Floods of 

May-June 1948 

in Columbia River 

Basin

Prepared under the direction of C. G. PAULSEN, Chief Hydraulic Engineer 

GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080

A presentation of data on 

floods, gathered from selected 

gaging stations and other sources

With a section on

Magnitude and Frequency of Floods

By S. E. RANTZ and H. C. RIGGS

* *

UNITED STATES

GOVERNMENT PRINTING OFFICE 

WASHINGTON : 1949
UNITED STATES DEPARTMENT OF THE INTERIOR

J. A. Krug, Secretary 

GEOLOGICAL SURVEY 

W. E. Wrather, Director

For sale by the Superintendent of Documents, U. S. Government Printing Office 

Washington 25, D. C. - Price $1.25 (paper cover)
CONTENTS

Abstract........................................................................... 1

Introductions...................................................................... 1

Administration and personnel....................................................... 3

Acknowledgments.................................................................... 4

General description of the floods.................................................. 5

Flood damage....................................................................... 13

Meteorologic and hydrologic conditions............................................. 15

Meteorology (prepared by staff of United States Weather Bureau)................... 15

Precipitation.................................................................... 21

Temperature...................................................................... 37

Determination of flood discharges.................................................. 37

Stages and discharges at stream-gaging stations.................................... 37

Explanation of data ............................................................ 37

Columbia River main stem......................................................... 45

Columbia River at Nicholson, British Columbia.................................. 45

Columbia River at Revelstoke, British Columbia................................. 47

Columbia River at Birchbank, British Columbia.................................. 48

Columbia River at international boundary....................................... 49

Franklin D. Roosevelt Lake at Grand Coulee Dam, Wash........................... 50

Columbia River at Grand Coulee Dam, Wash....................................... '51

Columbia River at Trinidad, Wash............................................... 53

Columbia River near The Dalles, Oreg........................................... 54

Kootenai River Basin............................................................. 55

Kootenay River at Canal Plats, British Columbia................................ 55

Kootenay River at Wardner, British Columbia.................................... 55

Kootenay River at Newgate, British Columbia.................................... 57

Kootenai River at Libby, Mont.................................................. 58

Kootenai River at Leonia, Idaho................................................ 59

Kootenai River at Boom Camp, near Bonners Perry, Idaho......................... 60

Kootenai River at Bonners Perry, Idaho......................................... 61

Kootenai River near Bonners Perry, Idaho....................................... 63

Kootenai River at Klockman Ranch, near Bonners Perry, Idaho.................... 64

Kootenai River near Copeland, Idaho............................................ 65

Kootenai River at Porthill, Idaho.............................................. 66

Kootenay Lake at Kuskonook, British Columbia................................... 67

Portine Creek near Trego, Mont................................................. 68

Lake Creek near Troy, Mont..................................................... 69

Boulder Creek near Leonia, Idaho............................................... 70

Moyie River at Eastport, Idaho................................................. 71

Moyie River at Elleen, Idaho................................................... 72

Deep Creek at Moravia, Idaho................................................... 73

Long Canyon Creek near Porthill, Idaho......................................... 74

Smith Creek near Porthill, Idaho............................................... 75

Boundary Creek near Porthill, Idaho............................................ 76

Slocan River at Crescent Valley, British Columbia.............................. 77

Pend Orellle River Basin......................................................... 73

Clark Pork above Missoula, Mont................................................ 73

Clark Pork below Missoula, Mont................................................ 79

Clark Pork at Tarkio, Mont.....................................'................ eo

Clark Pork at St. Regis, Mont.................................................. 81

Clark Pork near Plains, Mont................................................... 82

Clark Pork near Heron, Mont.................................................... 83

Pend Oreille Lake at Hope, Idaho............................................... 84

Pend Oreille River below Z Canyon, near Metaline Palls, Wash................... 85

Smaller reservoirs in Pend Oreille River Basin, Mont........................... 86

Flint Creek near Southern Cross, Mont.......................................... 90

Flint Creek at Maxville, Mont.................................................. 91

Flint Creek near Maxville, Mont................................................ 92

Flint Creek near Drummond, Mont................................................ 92

Trout Creek above main canal, near Philipsburg, Mont........................... 93

Trout Creek near Southern Cross, Mont.......................................... 94

Boulder Creek at Maxville, Mont................................................ 95

Willow Creek near Hall, Mont................................................... 96

Middle Fork Rock Creek near Philipsburg, Mont.................................. 97

Blackfoot River near Helmville, Mont........................................... 98

Blackfoot River near Ovando, Mont.............................................. 99

Blackfoot River near Bonner, Mont.............................................. 100

Nevada Creek above reservoir, near Finn, Mont.................................. 101

Nevada Creek near Helmville, Mont.............................................. 102

West Fork Bitterroot River near Conner, Mont................................... 103

Bltterroot River near Darby, Mont.............................................. 104

East Pork Bitterroot River at Conner, Mont..................................... 105

Rock Creek near Darby, Mont.................................................... 106

Rock Creek Canal near Darby, Mont.............................................. 106

Blodgett Creek near Corvallis, Mont............................................ 107

Bear Creek near Victor, Mont................................................... 109

Burnt Fork Creek near Stevensvllle, Mont....................................... 110

Plathead River at Flathead, British Columbia.................................... in

Flathead River near Columbia Falls, Mont....................................... 112

Plathead River at Columbia Palls, Mont......................................... 113

Plathewi Lake at Somers, Mont.................................................. 114

Plathead River near Poison, Mont............................................... 115

Middle Pork Plathead River at Essex, Mont...................................... lie

Middle Pork Plathead River near Belton, Mont................................... 117

Bear Oreek near Essex, Mont.................................................... 118

Skyland Creek near Essex, Mont................................................. 119

III
Stages and discharges at stream-gaging stations Continued.

Pend Oreille River Basin--Continued. Page

South Pork Flathead River near Columbia Palls, Mont............................ 120

Stlllwater River near WhitefIsh, Mont.......................................... 121

WhltefIsh Creek near Kalispell, Mont........................................... 122

Ashley Creek near Kaliapell, Mont.............................................. 123

Swan River near Big Pork, Mont................................................. 124

Priest Lake at outlet, near Coolln, Idaho...................................... 125

Priest River at outlet of Priest Lake, near Coolln, Idaho...................... 126

Priest River near Priest River, Idaho.......................................... 127

Kettle River Basin............................................................... 128

Kettle River near Perry, Wash.................................................. 128

Kettle River near Laurier, Wash................................................ 129

Colville River Basin.............................................................. 130

Colville River at Kettle Palls, Wash........................................... 130

Mill Creek near Colville, Wash................................................. 131

Spokane River Basin.............................................................. 132

Coeur d'Alene River near Prlchard, Idaho....................................... 132

Coeur d'Alene River at Enaville, Idaho......................................... 133

Coeur d'Alene River near Cataldo, Idaho........................................ 134

Coeur d'Alene Lake at Coeur d'Alene, Idaho..................................... 135

Spokane River at Post Palls, Idaho............................................. 136

Spokane River at Spokane, Wash................................................. 137

Spokane River at Long Lake, Wash............................................... 138

St. Joe River at Calder, Idaho ........................................*......... 139

St. Maries River at Lotus, Idaho............................................... 140

Hayden Creek near Hayden Lake, Idaho........................................... 141

Hayden Lake at Hayden Lake, Idaho.............................................. 141

Latah Creek at Spokane, Wash................................................... 142

Little Spokane River near Dartford, Wash....................................... 143

Okanogan River Basin............................................................. 144

Osoyoos Lake near Orovllle, Wash............................................... 144

Okanogan River at Oroville, Wash............................................... 145

Okanogan River near Tonasket, Wash............................................. 146

Simllkameen River near Nlghtha>rk, Wash......................................... 147

Methow River Bas in............................................................... 148

Methow River at Twlsp, Wash.................................................... 148

Chelan River Bas in............................................................... 149

Stehekln River at Stehekln, Wash............................................... 149

Lake Chelan at Chelan, Wash.................................................... 150

Chelan River at Chelan, Wash................................................... 151

Railroad Creek at Lucerne, Wash................................................ 152

Wenatchee River Basin............................................................ 152

Wenatchee Lake near Plain, Wash................................................ 152

Wenatchee River below Wenatchee Lake, Wash..................................... 153

Wenatchee River at Plain, Wash................................................. 154

Wenatchee River at Peshastin, Wash............................................. 155

Chlwawa River near Plain, Wash................................................. 156

Icicle Creek above Snow Creek, near Leavenworth, Wash.......................... 157

Crab Creek Basin................................................................. 158

Crab Creek at Irby, Wash....................................................... 158

Crab Creek near Moses L&ke, Wash............................................... 159

Crab Creek near Warden, Wash................................................... 159

Crab Creek near Smyrna, Wash................................................... 160

Park Creek below Park Lake, near Coulee City, Wash............................. 161

Rocky Ford Creek near Ephrata, Wash............................................ 1S1

Moses Lake at Moses Lake, Wash................................................. 162

Park Lake near Coulee City, Wash............................................... 162

Blue Lake near Coulee City, Wash............................................... 162

Lenore Lake near Soap Lake, Wash............................................... 162

Soap Lake near Soap Lake, Wash................................................. 162

Yakima River Basin............................................................... 183

Keechelus Lake near Martin, Wash............................................... 163

Yakima River near Martin, Wash................................................. 164

Yakima River at Cle Elum, Wash................................................. 165

Yakima River at Umtanum, Wash.................................................. 1S6

Yakima River near Parker, Wash................................................. 137

Yakima River at Kiona, Wash.................................................... 168

Kachess Lake near Easton, Wash................................................. 169

Kachess River near Easton, Wash................................................ 170

Cle Elum Lake near Roslyn, Wash................................................ 172

Cle Elum River near Roslyn, Wash............................................... 173

Teanaway River near Cle Elum, Wash............................................. 175

Naches River below Tieton River, near Naches, Wash............................. 176

Bumping Lake near Nile, Wash................................................... 177

Bumping River near Nile, Wash.................................................. 178

American River near Nile, Wash................................................. 179

Tieton Reservoir near Naches, Wash............................................. 180

Tieton River at Tieton Dam, near Naches, Wash.................................. 181

Tieton River at headworks of Tieton Canal, near Naches, Wash................... 182

North ?ork Ahtanum Creek near Tampico, Wash.................................... 183

South ?ork Ahtanum Creek at Conrad Ranch, near Tampico, Wash................... 184

Snake River Basin................................................................ 185

Snake River main stem.......................................................... 185

Snake River at Weiser, Idaho................................................. 185

Snake River at Oxbow, Oreg................................................... 186

Snake River near Clarkston, Wash............................................. 187

Payette River Basin............................................................ 189

Payette River near Payette, Idaho............................................ 189

Burnt River Basin.............................................................. 190

Burnt River near Hereford, Oreg.............................................. 190

Powder River Basin............................................................. 191

Powder River at Salisbury, Oreg.............................................. 191
CONTENTS V

Stages and discharges at stream-gaging stations Continued. 

Snake River Basin Continued.

Powder River Basin Continued. Page

Powder River near Haines, Oreg............................................... 192

Powder River near Robinette, Oreg............................................ 193

Wolf Creek near North Powder> Oreg........................................... 194

Imnaha River Basin.............v............................................... 195

Iranaha River above Gumboot Creek, Oreg.............................*.......... 195

Imnaha River at Imnaha, Oreg................................................. 196

Salmon River Basin............................................................. 197

Salmon River near Obsidian, Idaho............................................ 197

Salmon River below Valley Creek, at Stanley, Idaho........................... 198

Salmon River below Yankee Fork, near Clayton, Idaho.......................... 199

Salmon River near Challis, Idaho............................................. 200

Salmon River at Salmon, Idaho................................................ 201

Salmon River near S,houp, Idaho............................................... 202

Salmon River near French Creek, Idaho........................................ 203

Salmon River at Whitebird, Idaho............................................. 204

Alturas Lake Creek near Obsidian, Idaho...................................... 205

Valley Creek at Stanley, Idaho............................................... 206

Yankee Fork Salmon River near Clayton, Idaho................................. 207

Challis Creek near Challis, Idaho............................................ 208

Panther Creek near Shoup, Idaho.............................................. 209

Middle Fork Salmon River near Cape Horn, Idaho............................... 210

Bear Valley Creek near Cape Horn, Idaho...................................... 211

Big Creek near Big Creek, Idaho.............................................. 212

South Pork Salmon River near Knox, Idaho..................................... 213

Johnson Creek near Landmark ranger station, Idaho............................ 214

Johnson Creek at Yellow Pine, Idaho.......................................... 215

Secesh River near Burgdorf, Idaho............................................ 217

Warren Creek near Warren, Idaho.............................................. 218

Mud Creek near Tamarack, Idaho............................................... 219

Grande Ronde River Bas in....................................................... 220

Grande Ronde River near Hilgard, Oreg........................................ 220

Grande Ronde River at La Grande, Oreg........................................ 221

Grande Ronde River at Rondowa, Oreg...................................... >4W . 222

Grande Ronde River at Troy, Oreg............................................. 223

Catherine Creek near Union, Oreg............................................. 224

Indian Creek near Imbler, Oreg............................................... 225

East Fork Wallowa River near Joseph, Oreg.................................... 226

Wallowa Falls power-plant tailrace near Joseph, Oreg......................... 226

Hurricane Creek near Joseph, Oreg............................................ 227

Lostine River near Lostine, Oreg............................................. 228

Bear Creek near Wallowa, Oreg................................................ 229

Asotin Creek Basin............................................................. 230

Asotin Creek near Asotin, Wash............................................... 230

Clearwater River Basin......................................................... 231

Selway River above Meadow Creek, near Lowell, Idaho.......................... 231

Selway River near Lowell, Idaho.............................................. 232

Clearwater River at Kamiah, Idaho............................................ 233

Clearwater River at Spalding, Idaho.......................................... 234

Lochsa River near Lowell, Idaho.............................................. 235

South Fork Clearwater River near Elk City, Idaho............................. 236

South Fork Clearwater River near Grangevllle, Idaho.......................... 237

North Fork Clearwater River at Bungalow ranger station, Idaho................ 238

North Pork Clearwater River near Ahsahka, Idaho.............................. 239

Potlatch Creek at Kendrick, Idaho............................................ 240

Walla Walla River Basin.......................................................... 240.

South Fork Walla Walla River near Milton, Oreg................................. 241

North Fork Walla Walla River near Milton, Oreg................................. 242

Mill Creek near Walla Walla, Wash................................. i............ 243

Mill Creek at Walla Walla, Wash................................................ 244

Blue Creek near Walla Walla, Wash.............................................. 244

Yellowhawk Creek at Walla Walla, Wash.......................................... 245

Garrison Creek at Walla Walla, Wash............................................ 245

East Fork Touchet River near Dayton, Wash...................................... 246

Touchet River near Touchet, Wash............................................... 247

Umatilla River Basin............................................................. 248

Umatilla River above Meacham Creek, near Gibbon, Oreg.......................... 248

Umatilla River at Pendleton, Oreg^............................................. 249

Umatilla River at Yoakum, Oreg.. .".............................................. 250

Umatilla River near Umatilla, Oreg............................................. 251

McKay Creek near Pilot Rock, Oreg.............................................. 252

McKay Creek near Pendleton, Oreg............................................... 253

Birch Creek at Rieth, Oreg..................................................... 254

Butter Creek near Pine City, Oreg.............................................. 255

John Day River Basin............................................................. 256

John Day River at Prairie City, Oreg........................................... 256

John Day River at Picture Gorge, near Dayville, Oreg........................... 257

John Day River at Service Creek, Oreg.......................................... 258

John Day River at McDonald Perry, Oreg......................................... 259

Strawberry Creek above Slide Creek, near Prairie City, Oreg.................... 260

North Fork John Day River near Dale, Oreg...................................... 261

North Pork John Day River at Monument, Oreg.................................... 262

Camas Creek near Ukiah, Oreg................................................... 263

Middle Fork John Day River at Ritter, Oreg..................................... 264

Fox Creek at gorge, near Fox, Oreg............................................. 265

Deschutes River Basin............................................................ 266

Deschutes River at Moody, near Biggs, Oreg..................................... 266

Klickitat River Basin............................................................ 267

Klickitat River near Pitt, Wash................................................ 267

Hood River Basin................................................................. 267

Hood River near Hood River, Oreg............................................... 267
Stages and discharges at stream-gaging stations Continued. Page

White Salmon River Basin......................................................... 268

White Salmon River near Underwood, Wash........................................ 268

Little White Salmon River Basin.................................................. 268

Little White Salmon River at Willard, Wash..................................... 268

Wind River Basin................................................................. 269

Wind River near Carson, Wash................................................... 269

Sandy River Basin................................................................ 269

Sandy River below Bull Run River, near Bull Run, Oreg........................... 269

Washougal River Basin............................................................ 270

Washougal River near Washougal, Wash........................................... 270

Willamette River Basin........................................................... 270

Willamette River at Salem, Oreg................................................ 270

Willamette River at Portland, Oreg............................................. 270

Mill Creek at Salem, Oreg...................................................... 271

South Yamhill River near Whiteson, Oreg........................................ 271

North Yamhill River near Pike, Oreg............................................ 272

Mollalla River near Canby, Oreg................................................ 272

Pudding River near Aurora, Oreg................................................ 273

Tualatin River near Willamette, Oreg........................................... 273

Clackamas River near Cazadero, Oreg............................................ 274

Johnson Creek at Sycamore, Oreg................................................ 274

Lewis River Basin................................................................ 275

Lewis River at Ariel, Wash..................................................... 275

East Fork Lewis River near Heisson, Wash....................................... 275

Kalama River Basin............................................................... 276

Kalama River below Italian Creek, near Kalama, Wash............................ 276

Cowlitz River Basin.............................................................. 276

Cowlitz River at Castle Rock, Wash............................................. 276

Elokomin River Basin............................................................. 277

Elokonin River at Castle Rock, Wash............................................ 277

Youngs River Basin............................................................... 277

Youngs River near Astoria, Oreg................................................ 277

Summary of flood stages and discharges............................................. 278

Flood-crest stages................................................................. 306

Stage relations, Columbia River near international boundary........................ 315

Magnitude and frequency of floods in the Columbia River Basin, by

S. E. Bantz and H. C. Riggs....................................................... 317

Abstract......................................................................... 317

Introduction..................................................................... 317

Administration and acknowledgments............................................... 318

Physical features of the basin................................................... 318

Characteristics of floods in Columbia River Basin................................ 322

Methods of analysis.............................................................. 326

Plotting positions............................................................. 327

Annual-flood method............................................................ 328

Partial-duration-series method................................................. 328

Comparison of annual-flood and partial-duration-series methods................. 329

Probable error of a flood-frequency graph...................................... 330

The enveloping curve............................................................. 331

Flood magnitude and frequencies.................................................. 333

Columbia River main stem....................................................... 335

Columbia River at Kettle Falls, Wash......................................... 335

Columbia River near The Dalles, Oreg......................................... 336

Kootenai River Basin........................................................... 338

Kootenai River at Libby, Mont................................................ 338

Kootenai River at Leonia, Idaho.............................................. 342

Kootenai River at Bonners Perry, Idaho....................................... 344

Boulder Creek near Leonia, Idaho............................................. 346

Moyie River at Eileen, Idaho................................................. 349

Deep Creek -at Moravia, Idaho................................................. 352

Smith Creek near Porthill, Idaho............................................. 354

Boundary Creek near Porthill, Idaho.......................................... 357

Pend Oreille River Basin....................................................... 360

Clark Fork above Missoula, Mont.............................................. 360

Clark Fork below Missoula, Mont.............................................. 362

Clark Fork at St. Regis, Mont................................................. 364

Clark Fork near Plains, Mont................................................. 368

Pend Oreille River below 2 Canyon, near Metaline Falls, Wash................. 370

Flathead River near Columbia Falls, Mont..................................... 372

Flathead River at Columbia Falls, Mont....................................... 374

Flathead River near Poison, Mont............................................. 377

Middle Fork Flathead River at Belton, Mont................................... 378

South Fork Flathead River near Columbia Falls, Mont.......................... 381

Whitefish Creek near Kalispell, Mont......................................... 383

Swan River near Big Fork, Mont............................................... 385

Priest River at outlet of Priest Lake, near Coolin, Idaho.................... 387

Kettle River Basin............................................................. 389

Kettle River near Ferj?y, Wash................................................ 389

Kettle River near Laurier, Wash............................................... 392

Colville River Basin........................................................... 394

Colville River at Kettle Falls, Wash......................................... 394

Spokane River Basin............................................................ 397

Coeur d'Alene'River near Cataldo, Idaho...................................... 397

Spokane River at Post Palls, Idaho........................................... 401

Spokane River at Spokane, Wash............................................... 402

St. Joe River at Calder, Idaho............................................... 403

Okanogan River Basin........................................................... 407

Okanogan River near Tonasket, Wash........................................... 407

Similkameen River near Nighthawk, Wash...................... '. ................ 409
CONTENTS VII

Flood magnitude and frequencies Continued. Page

Methow River Basin............................................................... 413

Methow River at Twisp, Wash.................................................... 413

Chelan River Basin............................................................... 415

Stehekin River at Stehekin, Wash................................................ 415

Railroad Creek at Lucerne, Wash................................................ 419

 Wenatchee River Basin............................................................ 422

Wenatchee River at Plain, Wash................................................. 422

Yakima River Basin............................................................... 426

North Pork Ahtanum Creek near Tampico, Wash.................................... 426

Snake River Basin... ............................................................ 428

Snake River near Clarkston, Wash,.............................................. 428

South Pork Boise River near Lenox, Idaho....................................... 431

Malheur River near Drewsey, Oreg............................................... 435

Salmon River below Yankee Pork, near Clayton, Idaho............................ 437

Salmon River at Whitebird, Idaho............................................... 440

Grande Ronde River at Rondowa, Oreg............................................ 442

Clearwater River at Kamiah, Idaho.............................................. 445

Umatilla River Basin............................................................. 449

Umatilla River near Umatilla, Oreg............................................. 449

John Day River Basin............................................................. 452

John Day River at McDonald Perry, Oreg......................................... 452

Deschutes River Basin............................................................ 456

Deschutes River at Moody, near Biggs, Oreg..................................... 456

White River below Tygh Valley, Oreg............................................ 459

Klickitat River Basin............................................................ 463

Klickitat River near Olenwood, Wash............................................ 463

Cowlitz River Basin.............................................................. 466

Cowlitz River at Castle Rock, Wash............................................. 466

List of references................................................................. 469

Index.............................................................................. 471

ILLUSTRATIONS

Page 

Plate 1. Flood scenes at Vanport, Oreg., on Columbia River...................... 2

2. Flood scenes as Vanport, Oreg., was being flooded...................... 3

3. Flood scenes in Portland, Oreg., on Willamette River................... 10

4. A, United States Coast Ouard rescuing stranded family on Sauvies

Island in Columbia River about 20 miles northwest of Portland, Oreg.;

B, Fruit Valley Homes, housing project near Vancouver, Wash.......... 16

5. Maps of Columbia River Basin, showing total precipitation during the

periods October 1 to May 31, 1893-94 and 1947-48..................... 26

6. Map of Columbia River Basin, showing location of flood determinations.. .......................................................-In pocket

7. A, Cofferdam at McNary dam site overtopped by Columbia River; B, Orande

Ronde River at lower end of State ditch, looking southwest........... 54

8. A, Break in dike along Kootenai River in Idaho through which reclamation district No. 5 was flooded; B, Break in dike along Kootenai 

River near Bonners Ferry............................................. 62

9. A, Bonners Ferry, Idaho, flooded by Kootenai River; B, Bridge of the 

United States Forest Service over Long Canyon Creek near Porthill, 

Idaho................................................................ 63

10. Flood scenes on Clark Pork in Montana.................................. 82

11. A, Bridge over Methow River near Carlton, Wash.; B, Building damaged by

Entiat River about 5 miles above mouth............................... 148

12. A, Clearwater River at Kamiah, Idaho; B, Flood damage on Whitebird

Creek near Whitebird, Idaho. ........................ .. . > 234

Figure 1. Map showing location of area covered by this report.................... 2

2. Maximum annual floods of Columbia River at The Dalles, Oreg............ 6

3. Graphs of stage and discharge for the floods of 1894 and 1948 at

various stream-gaging stations in Columbia River Basin............... 8

4. Map showing air-flow pattern and air temperatures (°F.) at 850 millibars (about 5,000 feet altitude), 7 p.m. May 1, 1948................. 17

5. Map showing air-flow pattern and air temperatures (°F.) at 850 millibars (about 5,000 feet altitude), 7 p.m. May 27, 1948................ 18

6. Chart showing air temperatures at an altitude of 5,000 feet, at Spokane,

Wash., May 1 to June 15, 1948........................................ 19

7. Chart showing air temperatures at an altitude of 5,000 feet at Boise,

Idaho, May 1 to June 15, 1948........................................ 20

8. Isohyetal map of Columbia River Basin showing total precipitation, in

inches, May 16-31, 1948.............................................. 23

9. Daily precipitation at various precipitation stations of the United 

States Weather Bureau in Idaho and of the Meteorological Service, 

Dominion of Canada, in-British Columbia, January 1 to June 30, 1948.. 24

10. Daily precipitation at various precipitation stations of the United

States Weather Bureau in Oregon, Washington, and Montana, January 1

to June 30, 1948..................................................... 25

11. Map of Columbia River Basin showing depth, in inches, of water content

of snow on the ground about April 1, 1948............................ 27

12. Cumulative monthly precipitation for various precipitation stations of 

the United States Weather Bureau for October 1 to June 30, 1893-94 

and 1947-48.......................................................... 28
VIII ILLUSTRATIONS

Page

Figure 13. Daily range of temperature and accumulated departure of mean monthly 

temperature from normal at various temperature stations of the 

United States Weather Bureau and the Meteorological Service, Dominion of Canada, in Columbia River Basin, January 1 to June 30, 

1948................................................................. 36

14. Daily range of temperatures at various temperature stations of the 

United States Weather Bureau in Columbia River Basin, April 1 to 

June 30, 1894 and 1948............................................... 38

15. Graphs of mean daily discharge at various river-measurement stations in

Kootenai and Pend Oreille River Basins, May 1 to July 31, 1948....... 41

16. Graphs of mean daily discharge at various river-measurement stati9ns in

upper Columbia River Basin, May 1 to July 31, 1948............. I..... 42

17. Graphs of mean daily discharge at various* river-measurement stations in

Snake and lower Columbia River Basins, May 1 to July 31, 1948........ 43

18. Graphs of mean daily discharge at various river-measurement stations on

Columbia River, May 1 to July 31, 1948............................... 44

19. Maximum discharges, in second-feet per square mile, for various areas

in Columbia River Basin, May-June 1948, as given in table 3.......... 279

20. Curves comparing stages of Columbia River near international boundary 

before and after completion of Little Dalles excavation and Grand 

Coulee Dam........................................................... 316

21. Graphs of mean dally discharge for year of high runoff at rivermeasurement stations on Snake, Boise, and Deschutes Rivers........... 319

22. Graphs of mean daily discharge for year of high runoff at rivermeasurement stations on Columbia, Kootenai, and Swan Rivers.......... 320

23. Graphs of mean daily discharge for year of high runoff at rivermeasurement stations on St. Joe River and Boulder Creek.............. 321

24. Graphs of discharge of various floods at different river-measurement

stations in Columbia River Basin..................................... 325

25. Annual-flood frequency graph for Columbia River near The Dalles, Oreg.,

showing use of Gumbel diagram........................................ 329

26. Flood-frequency graph for Swan River near Big Fork, Mont., showing

probable limits of variation......................................... 331

27. Maximum discharges, in second-feet per square mile, of various floods

for different areas in Columbia River Basin.......................... 332

Page 

Table 1. Preliminary estimate of flood damage................................... 13

2. Equivalent depth of water, in inches, determined by snow surveys about

April 1............................................................... 29

3. Summary of flood stages and discharges................................. 280

4. Flood crest stages..................................................... 307
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

The flood of May-June 1948 in the Columbia River Basin was the greatest in the 

basin since the historic flood of 1894 and the most disastrous in respect to monetary 

loss in the history of the basin. Loss of life was relatively small when considered 

in the light of the extensive damage and destruction to homes and other property. 

Outstanding features of the flood were its magnitude in the large streams and the long 

duration of peak or near-peak stages.

The flood was caused by a combination of conditions conducive to the production of 

high runoff. Cold wet weather prevailed until mid-May. Snow surveys showed that the 

mountain snow pack, already above normal, increased in water content during April and 

early May. After May 15 temperatures over the basin rose sharply and continued to be 

abnormally high.

Pew discharge records in the basin are continuous since 1894. However, available 

records of discharge and heights of former floods indicate that on the main stem of the 

Columbia and on the principal tributaries above The Dalles, Oreg., the flood of 1948 

was the greatest since 1894. Streams in the upper Snake River Basin were not abnormally 

high, owing to a relatively light snow pack in the area. Willamette River made little 

contribution in discharge to the flood on the lower Columbia, although the Willamette 

near the mouth was raised by the Columbia. On many smaller tributaries in other parts 

of the basin the peak discharges of 1948 have been exceeded more recently than 1894, as 

high unit rates of discharge on small streams, especially those at low altitudes, are 

more likely to result from intense local rains than from snow melt.

Notable high rates of discharge largely from snow melt were 36.1 second-feet per 

square mile from 1,330 square miles in Methow River in Washington, 27.4 second-feet 

per square mile from 1,640 square miles in South Pork Plathead River in Montana, and 

18.5 second-feet per square mile from 9,570 square miles in Clearwater River in Idaho.

As soon as the magnitude of the flood became evident, prompt action was taken by 

the Congress in granting an appropriation to the Interior Department in general for 

the restoration "of facilities damaged or destroyed by the flood. To supplement the 

existing stream-gaging program, an allotment from this appropriation was made to the 

Geological Survey for preparation of a flood report and rehabiliation of gaging 

stations damaged by the flood. The Geological Survey thereby was enabled to take 

prompt steps towards collecting information relating to the flood and to plan the preparation of a flood report.

This report presents records of stage and discharge for the period including the 

flood at about 230 stream-gaging stations, records of storage in many reservoirs, a 

summary of peak discharges with comparative data for floods at about 490 measurement 

points, and tables showing crest stages along an aggregate length of stream channel 

for 657 miles.

The report also includes a discussion of weather associated with the flood, a 

discussion of snow as a factor in producing the flood, tables showing water content 

of snow prior to the flood period, and other data pertinent to the flood.

Following the main flood report is a brief report entitled, "Magnitude and 

Frequency of Floods in the Columbia River Basin," a study of recurrence intervals of 

floods of various magnitudes.

INTRODUCTION

During the latter part of May and the early part of June 1948 the Columbia 

River Basin in the United States and Canada was ravaged by a flood that was the 

greatest in magnitude of discharge since 1894 and the most disastrous with respect 

to monetary losses in the history of the basin. At least 51 persons lost their lives, 

and property damage has been estimated to exceed 100 million dollars. Land inundated 

by the flood included about 250,000 acres of farm land, on which the growing crops 

were destroyed. More than 20,000 acres of land was damaged or destroyed by erosion. 

Destruction of the community of Vanport at Portland, Oreg., left nearly 19,000 persons 

homeless and took the lives of at least 16. (See pis. 1, 2.)

The United States Geological Survey, operating through several district offices, 

maintains nearly 600 river-measurement stations within the Columbia River Basin in 

the United States, as a part of the regular Nation-wide stream-gaging program for the 

investigation of the water resources of the Nation. These stations have been maintained 

by the Geological Survey largely in cooperation with states, municipalities, and other 

Federal agencies. Many have been operated for continuous periods of such length that 

systematic records of stages, discharges, and volumes of flow covering the range from 

drought to extraordinary flood are available.

1
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Outline of «re« covered ij ttus report 

Outline of Columbia Rlvtr tfraJMfe basin

123' us' USFigure l.--Map showing location of area covered by this report.
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 1

A. BREAK IN RAILROAD FILL THROUGH WHICH VANPORT WAS FLOODED. 

Courtesy of The Oregonian.

B. VANPORT AFTER BEING FLOODED. 

Courtesy of Les T. Ordeman, Oregon Journal.

FLOOD SCENES AT VANPORT, OREG., ON COLUMBIA RIVER.
 GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 2

A. AUTOMOBILES BEING REMOVED FROM VANPORT AS FLOODWATERS RISE. 

Courtesy of Mel Junghans, Oregon Journal.

B. RESCUE OPERATIONS IN VANPORT AS WATER RISES. 

Courtesy of The Oregonian.

FLOOD SCENES AS VANPORT, OREG., WAS BEING FLOODED.
ADMINISTRATION AND PERSONNEL 3

Similarly the Dominion Water and Power Bureau, Department of Mines and Resources, 

Dominion of Canada, operates and maintains river-measurement stations in the Columbia 

River Basin in Canada. Many of the stations at or near the boundary between the two 

countries are operated by the two agencies under a formal diplomatic arrangement 

designed to make the records equally available and acceptable to users in the two 

countries.

Flood data have been collected in this report for both the United States and 

Canadian parts of the basin because of the importance of the Columbia River as an 

international stream and particularly because of the special usefulness of the data 

in studies currently being made of the development of the water resources of the basin 

by the International Joint Commission, the United States, and Canada.

As soon as the magnitude of the flood became apparent. Immediate action was

taken to collect and compile all available data concerning the maximum stages and

* 

discharges of streams throughout the flooded area. It was necessary that field work

be started promptly in order that all possible data could be collected before they were 

obliterated by processes of reconstruction, vegetal growth, or weathering. The work of 

the Geological Survey was done as a part of the current program for the investigation of 

the water resources, supplemented by $95,000 allocated to the Geological Survey for the 

preparation of this report from an appropriation of $2,000,000 made by the Congress to 

the Department of the Interior for repair of flood damage to facilities of the Interior 

Department in the Columbia River Basin.

The cost of printing the report was borne by funds appropriated to the Department 

of State and transferred to the Geological Survey for technical investigations relative 

to matters under study by the International Joint Commission.

The first published figures of stages and discharges during the flood were contained 

in a supplement to the May issue and in the June issue of the Water Resources Review - 

United States and Canada, prepared by the Geological Survey and released for distribution 

on June 10 and July 8, 1948, respectively. A preliminary report in more detail was 

released for distribution in September 1948.

This volume presents the records of stages and discharges of rivers in the Columbia 

River Basin during the floods of May and June 1948, discussions of the meteorologic and 

hydrologic aspects, and other information related to the flood.

Figure 1 shows the area covered by this report and the areas in which flooding was 

most severe.

An independent report is presented on pages 317-469 entitled, "Magnitude and frequency of floods in the Columbia River Basin," by S. E Rantz and H. C Riggs, hydraulic 

engineers of the Geological Survey. This report was prepared in the main as a part of 

the Columbia River Basin studies in progress under the International Joint Commission.

ADMINISTRATION AND PERSONNEL

This report was prepared by the water resources division of the Geological Survey 

under the general administrative supervision of C. G. Paulsen, chief hydraulic engineer.

The field work and the collection and tabulation of the baaic information relating 

to stages and discharges for all except the Canadian portion of the basin were performed 

by the district engineers and their staffs in the surface water branch, J. V. B. Wells, 

chief The district engineers responsible for collection and preparation of this infer-
4 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

mation were F. M. Veatch, Tacoma, Wash.; G. H. Canfield, Portland, Oreg., succeeded by 

K. N. Phillips; T. R. Newell, Boise, Idaho; Lynn Crandall, Idaho Palls, Idaho; and A. H. 

Tuttle, Helena, Mont. Valuable assistance in performing the field and office work was 

given by engineers detailed from other parts of the United States. The work was coordinated in the field by C. C. McDonald, district engineer, water utilization branch, Tacoma, 

Wash., and Hollister Johnson, hydraulic engineer, surface water branch.

All data,for the Canadian portion of the basin were furnished by C. E. Webb, 

district chief engineer, and his staff, of the Dominion Water and Power Bureau, Victor 

Meek, controller.

The report was given final review and was assembled for publication in the special 

reports section, 0. C. Stevens, chief, by C. D. Bue, hydraulic engineer, assisted by 

D. L. Milliken, hydraulic engineer on detail to the special reports section.

ACKNOWLEDGMENTS t

The Geological Survey, acting through its district field offices, cooperates with 

state, municipal, and Federal agencies in the several districts. Acknowledgment is 

made of the participation of the cooperating agencies in the collection of the systematic 

records of river discharge that form the broad base on which the specific flood Information has been placed.

The information in this report has been obtained from many sources, including 

Individuals, corporations, and governmental organizations - local, state, and Federal. 

Financial cooperation in connection with the regular river-measurement program of the 

Geological Survey In the areas covsred by this report has been received from the following state and local agencies: In Oregon, the office of State Engineer; in Washington, 

the State Department of Conservation and Development, Columbia County, and Walla Walla 

County Planning Commission; In Idaho, the Idaho Department of Reclamation; and In 

Montana, the office of State Engineer and the State Water Conservation Board.

Federal agencies in the United States to whom acknowledgments are made for 

financial assistance, services rendered, or data furnished Include the Corps of Engineers, the Bureau of Reclamation, the Department of State, the Office of Indian Affairs, 

the Weather Bureau, the Forest Service, and the Soil Conservation Service.

Assistance In collecting records was also rendered by North Side Canal Co., Board 

of Control for Boise Project, Crane Creek Reservoir Administration Board, Lake Irrigation District, Salmon River Canal Co., Idaho Power Co., Oakley Canal Co., city of 

Pocatello, watermasters for Snake, Welser, Big Lost, Big Wood, Boise, and Lake Fork 

Payette Rivers, Montana Power Co., Portland General Electric Co., Pacific Power and 

Light Co., Eastern Oregon Land Co., California-Pacific Utilities Co., Washington Water 

Power Co., and Puget Sound Power and Light Co. So far as practicable, acknowledgments 

for individual contributions of Information are given at appropriate places in the 

report.

The International Columbia River Engineering Board rendered valuable assistance 

In enlisting the cooperation and participation of other agencies, particularly those 

in Canada.

Records for stations in Canada other than those designated as International 

gaging stations and other information for the Canadian portion of the basin were 

furnished by the Dominion Water and Power Bureau, Department of Mines and Resources, 

Canada.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIOTER BASIN E 

GENEHAL DESCRIPTION OP THE FLOODS

The flood of May-June 1948 In the Columbia River Basin had its Immediate cause in 

a sequence of temperatures conducive to production of a flood from snow melt. During 

April and the early part of May temperatures had been subnormal, so that melting of the 

snows in the high mountains was delayed. Snow surveys showed that the mountain snow 

pack, already above normal, contraseasonally increased in water content during April 

and early May. The last surveys of the season, made about May 1, showed water contents 

greatly above normal for that date. Snow-survey records indicate that the water content 

for that date may have exceeded 200 percent of normal in some areas. On May 16 temperatures rose generally to an unusual amount above normal in the upper basin and remained 

abnormally, high. During the week ending May 25 precipitation totals of 2 to 3 inches 

were recorded in the area between Grand Coulee Dam, Wash., and Kalispell, Mont. Conditions were favorable for a major flood.

Possible flood hazard was recognized as early as March 1, and by May 1 runoff of 

damaging proportions was considered almost a certainty. "Water supply forecasts for the 

Columbia Basin," issued as of May 1 by the United States Weather Bureau, is quoted in 

part: "By and large, April precipitation over the Columbia Basin was unusually large, 

and runoff forecasts have been modified upwards very considerably over most of the 

area...... The Clark Pork-Pend Oreille, Spokane, and Clearwater Basins are forecast to

have very large runoffs exceeding in places the maxima of record..... Flood hazards

have increased on the Clark Pork-Pend Oreille, the Spokane and its tributaries, the 

Clearwater, the Kootenai, and the main stem of the Columbia River. Suitable precautions 

should be taken against flooding, seepages, and damage to irrigation works along these 

streams."

"Federal-state cooperative snow surveys and irrigation water forecasts for Columbia 

Basin," issued as of May 1 by the Soil Conservation Service, is quoted in part: "Retarded snow melt and above-normal precipitation during April will increase the amount 

and rate of runoff throughout the northern and western parts of the Columbia River 

Basin. The outlook a month ago in these areas for greater than normal runoff with possible flood hazard has changed to certainty of runoff of flood proportions with attendant damage in vulnerable areas..... Flood hazard exists on the stream in northern 

Idaho, western Montana, and in Washington. For the third consecutive year high water 

in Kootenai Valley at and below Bonners Ferry, Idaho, is expected...... Now it is possible that high [Kootenai] river stages will happen again, possibly higher than either 

of the past 2 years, and it is imperative that the situation be closely watched. More 

or less the same outlook for near maximum runoff and flood hazard holds for all the 

tributaries to Columbia River in northern Idaho, western Montana, Washington, and British Columbia..... Also, extra high water may be expected on all these streams during 

the latter part of May and in June. This same situation may also extend to lower Columbia River."

Available records indicate that the flood of 1948 was the greatest since 1894 on 

the large rivers of the basin, although on many smaller tributaries more recent floods 

have occurred, which were generally greater than that of 1948. This flood has been 

exceeded on the lower Columbia River during the last 100 years only by the floods of 

1894 and 1876, and probably the flood of 1849. (See fig. 2.) The 1948 flood was of 

greatest severity in the Columbia River tributaries in northern Washington, in the Pend
MAXIMUM DISCHARGE, IN THOUSANDS OFSECOND-FEET

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Figure 2.--Maximum annual floods of Columbia River at The D
GENERAL DESCRIPTION OP THE FLOODS 7

Orellle-Kootenal region, and In the lower Snake River tributaries. Peak flows were not 

unusually great In the upper Snake River Basin and In the tributaries to the Columbia 

River below Desohutes River.

Plates 1 to 4 and 7 to 12 illustrate conditions experienced on rivers in the 

Columbia River Basin during the floods of May-June 1948.

A critical feature of the flood was the long duration of peak or near-peak stages 

on the Columbia. (See fig. 3.) Willamette River at Portland, Oreg., backed up by the 

Columbia, reached peak stages of 29.95 feet on June 1 and 29.975 feet on June 14. The 

stage at Portland remained above 25 feet for 26 days, as compared with 29 days in 1894, 

and above flood stage of 18 feet for 43 days, as compared with 57 days in 1894. Columbia River near The Dalles, Oreg.,'reached a peak discharge of 1,010,000 second-feet on 

May 31. Discharge remained above 900,000 second-feet for 17 days, as compared with 24 

days in 1894, and above 500,000 second-feet for 42 days, as compared with 65 days in 

1894. Threatening stages were prolonged by heavy rains and continued high temperatures 

after the crest of the snow runoff had passed.

After May 15 above-normal temperatures prevailed, and headwater streams rose 

rapidly. On May 23 the first dike failure occurred along Kootenai River in Idaho. At 

Bonners Perry the crest elevation of 1,778.32 feet was reached on May 28, a level 

1.1 feet above the peak of the flood of 1894. As the discharge of the flood of 1948 was 

less than that of 1894, this increased flood level probably reflects the effect of river 

constriction by diking. Since 1894, and mostly within the past 25 years, the normal 

flood plain of Kootenai River between Bonners Ferry and Kootenay Lake has been diked off 

and reclaimed for agriculture. On the basis of studies by the Geological Survey, it is 

estimated that the crest of 1948 In Idaho would have been at least 1 to 2 feet higher 

except for the effect of channel excavation made in recent years below Nelson, British 

Columbia. Depths of water in Bonners Ferry ranged from 18 inches on sidewalks of the 

main street to eaves of houses in the lower areas. The city's water system failed on 

account of a broken main caused by the flood, and the sewerage system was not operating 

for several days. Power, telephone, and telegraphic services were practically uninterrupted. An official of the Great Northern Railway reported 7 or 8 miles of main 

line track under water in the Kootenai area. Several highways in the vicinity of 

Bonners Ferry were closed. About 40,000 acres of diked land was flooded, causing severe 

damage to growing crops. Upstream in Montana the Kootenai flooded basements in the 

business districts of Libby and Troy, and about 60 families were forced to leave their 

homes.

In Montana warm weather and heavy rains produced peak flows as early as May 23 on 

Plathead River and Clark Pork. A minor recession occurred, followed by another general 

peak on tributary streams about May 28. About 40 families were evacuated along Plathead 

River in the Kalispell area, and more than 1,500 acres of" farm land was flooded. Flooding of farm land was general along dark Fork between Missoula and the Montana-Idaho 

State line. Extensive flooding of low-lying land occurred along Bitterroot River, where 

in the upper reaches stages were exceeded by those of May 1947. In parts of Flathead 

River Basin the stages of 1948 were exceeded by those of 1928 and 1933.

Flooding occurred along Clark Fork in Idaho, with the peak discharge near the mouth 

(at Fend Orellle Lake) occurring on May 31. The town of Sandpoint, situated on Fend 

Oreille Lake near its outlet into Pend Oreille River, underwent considerable damage from

824933 O - 49 - 2
DISCHARGE IN THOUSANDS OF SECOND-FEET, 

SPOKANE RIVER AT SPOKANE, WASHINGTON

DISCHARGE IN THOUSANDS OF SECOND-FEET, 

COLUMBIA RIVER NEAR THE DALLES, OREGON

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GENERAL DESCRIPTION OF THE FLOODS 9

inundation. In Spokane River Basin in Idaho some farm land was flooded, and damage to 

forest roads and bridges is reported to have been especially severe. Highway communication along StJ. Joe River was cut off, but railway service was not interrupted. St. Joe 

River reached its peak on May 28 at a discharge substantially below those of December 

1933 and April 1938.

On May 31 Pend Orellle River flooded 12,000 acres around Cusick and Usk, Wash., and 

forced 600 residents to leave their homes when dikes were dynamited. The primary state 

highway to Metaline Falls was inundated in several places, and a bridge over Tacoma 

Creek near Usk was washed out.

Owing to regulation and diversion and a relatively light snow pack in the upper 

headwaters, the contribution from the upper Snake River was small in proportion to the 

area drained. However, heavy contributions were made by Salmon and Clearwater Rivers, 

and low-lying areas of several towns in the Clearwater Basin were flooded. Considerable 

damage was done to Forest Service roads and trails.

Considerable damage occurred in Grande Ronde River Valley in eastern Oregon during 

the latter part of May. On May 23 Catherine Creek, a tributary to Grande Ronde River, 

overflowed its banks and flooded part of the town of Union. For several subsequent days 

Union was flooded by overflow from Catherine and Little Creeks, which continued to rise 

until about May 27 or 28.

Severe damage occurred along Methow River in Washington. The towns of Twisp, 

' Methow, and Winthrop were isolated, and six state highway bridges were destroyed or rendered unusable. Sections of highway were washed out, and many orchards and homes were 

completely destroyed. Eleven weeks elapsed before the main highway was opened to 

traffic. Okanogan River flooded parts of the towns of Omak and Okanogan, and many residents were evacuated. Salmon Creek, tributary to Okanogan River, overflowed and ran 

down the main street of Conconnully. About half of the houses in town were damaged, the 

outlet highway was closed, and one man was drowned. It is of interest to note that the 

same town underwent greater destruction in 1894, when on May 27, according to newspaper 

accounts, a cloudburst in the headwaters of Salmon Creek sent a wall of water 8 to 12 

feet high through Conconnully, washing away every one of the 125 buildings except the 

hotel and post office, and drowning 1 person.

By May 27 Columbia River had overflowed its banks at Hanford, Wash., and 5,000 

persons were evacuated. On May 28 the shipyards at Washougal, Camas, Vancouver, and 

Ridgefield were shut down, and the Camas-Washougal port was under 5 feet of water. On 

May 29 the Columbia River Highway was closed between The Dalles and Cascade Locks in 

Oregon, and 1,400 persons were evacuated near Vancouver, Wash.

The greatest single disaster of the flood occurred at Vanport, Oreg., when a railroad fill serving as a dike broke at 4:15 p.m. on Sunday, May 30. A wall of water 

poured through the breach with such rapidity that few of the 18,700 residents escaped 

with more than the clothing they were wearing. Within an hour the town was completely 

destroyed. According to most recent reports at least 16 persons lost their lives. The 

disaster occurred on a Sunday afternoon, the middle of a 3-day holiday, when many people 

were absent or were using the holiday to move out of danger; had the disaster occurred 

at night on a work day the loss of life might have mounted to thousands. Because the 

area was surrounded by dikes it became a placid lake after it filled with water. Houses 

that had not been demolished by the first onrushing wave floated in 10 to 15 feet of 

water. Hundreds of volunteer workers, policemen, Fed Cross workers, national guardsmen,
10 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

soldiers, and sheriff's deputies searched the wreckage for bodies. The search was expedited by the use of war-developed amphibious vehicles. Sixty-five Portland elementary 

schools were converted Into emergency shelters for the evacuees.

At The Dalles, Oreg., the river broke through a levee at about 6 a.m. on May 30, 

flooding the lower section of the town. The crest reached The Dalles at 6:30 p.m. on 

May 31.

As the flood crest moved downstream, the Corps of Engineers on June 1 ordered mass 

evacuation from areas along both sides of the lower Columbia River below Portland, Oreg. 

Downstream from Portland, floodwaters of Lewis River, backed up by the Columbia, threatened the town of Woodland, Wash., with a disaster 4 similar to that which befell Vanport. 

By the night of June 1 the residents of all the threatened areas In the lower valley had 

been evacuated. On June 2 dikes failed In Woodland, and water stood 2 to 8 feet deep In 

the business district. Because of the foresight In evacuating the residential areas no 

lives were lost.

Willamette River at Portland, backed up by the Columbia, reached a stage of 29.95 

feet on June 1 from 11 a.m. to noon and then began to recede slowly, only to renew Its 

. threat as the upper river In British Columbia and Snake and Pend Oreille Rivers began to 

rise again. A second crest of 29.975 feet, as observed by Portland Harbor Patrol, occurred from 2 to 4 a.m. on June 14. During the period between crests, and for many days

thereafter, the river remained a menace. The Corps of Engineers ordered suspension of

 > *

river traffic below Portland, as waves caused by boats might break through dikes already

nearly overtopped and softened by days of high stage. Thousands of engineer troops and 

volunteer workers labored unceasingly to save the dikes along the lower river.

The runoff from Willamette River was not abnormally high during the flood period. 

On June 1 Willamette River was discharging about 34,000 second-feet at its mouth; however, it was backed up by Columbia River, and the Union Station in Portland stood in 

quiet backwater. (See pi. 3.)

The following description of the flood in Canada was furnished by C. S. Webb, 

district chief engineer, Dominion Water and Power Bureau, Vancouver, British Columbia:

"Flood damage was general throughout the Province of British Columbia during May 

and June of 1948, as the rivers rose to their highest levels since 1894. Thirty thousand 

civilians and 3,500 Air Force, Army, and Navy personnel battled to save the dykes. As 

the flood waters receded, 20,000 persons were displaced from their homes, and property 

damage amounted to $18,000,000.

"In the Skeena, Columbia, and Fraser Basins rivers rose to extreme heights, washing 

out highways and railroads in many localities, disrupting transportation and communication. The city of Fernie [jon Elk River in Kootenay Basin] was isolated for several 

weeks, while waters of Mark Creek LKootenay BasinJ flowed through the heart, of the city 

of Kimberley, destroying a considerable portion of the business section, as well as 

residential areas. The lower part of the city of Trail [_on main stem of ColumbiaJ was 

inundated. Some 15,000 acres of highly productive land in the Kootenay Valley in the 

vicinity of Creston was flooded.

"The Fraser River Basin, particularly in its lower reaches, was probably the hardest hit section of the Province. Fifty thousand acres of fruit and berry lands were 

flooded. The city of Vancouver was virtually isolated for approximately 3 weeks as 

railways were washed out and telegraph and telephone services were disrupted. The air 

lines were Vancouver's only outside connection until service was resumed on Canadian 

transcontinental railways."
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 3

A. UNION STATION. 

Courtesy of The Oregoniati.

VISITORS PLEASE WAIT LOBBY OF STATION

B. INSIDE UNION STATION. 

Courtesy of Herb Alden, Oregon Journal.

FLOOD SCENES IN PORTLAND, OREG., ON WILLAMETTE RIVER.

GENERAL DESCRIPTION OF THE FLOODS 11

Plash cloudburst floods occurred in several localities, adding to the damage 

caused by the general flood. On May 28 a flash flood from Iron Springs Creek at Ephrata, 

in east-central Washington, flooded the downtown area and left 3 feet of mud and water 

in the county courthouse. On the same day, a flash flood from Gorge Gulch and Canyon 

Creek sent water 2 feet deep through the town of Burke, Idaho, leaving only two houses 

undamaged.

Severe local storms began in the late afternoon of June 9 and continued intermittently for several days in Gilliam, Morrow, Wheeler, and Dinatilla Counties--the heart 

of the wheat belt of northeastern Oregon resulting in damage to growing grain and destruction of ferries, livestock, roads, and bridges. Several homes were flooded, 20 

miles of logging railroad was damaged, and two lives were lost. According to available 

reports the most concentrated of these storms occurred in the basins of Black Horse, 

Butter, and Thirtymile Creeks. Determinations of discharge were made at two points in 

Butter Creek Basin, where a cloudburst occurred on June 9. Computation by the slopearea method indicates discharges of 3,580 and 3,700 second-feet per square mile from 

two washes with drainage areas of 0.33 and 1.41 square miles, respectively. The latter 

discharge is equivalent to a runoff rate of nearly 6 inches per hour.

A disturbance crossed eastern Washington on June 10, causing intense storms in 

several localities. At Richland, Wash., high winds caused waves of such height on the 

still high Columbia River that the dikes were threatened. Officials of the atomic 

energy plant sent out urgent appeals for help, and 100,000 sand bags and other equipment were brought in by plane. Power and telephone lines were broken down around Sunnyside, Wash., by the heavy winds and torrential rains. This same storm hit near Harrington, Wash., and sent 5 feet of water sweeping over the main highway. Later in the 

evening another cloudburst in the same locality delayed train traffic for about 6 hours. 

Pine Canyon Creek near Waterville, Wash., rushed down Pine Canyon and destroyed several 

miles of paved highway. A slope-area measurement indicated a discharge from South Pork 

Pine Canyon Creek of 4,630 second-feet per square mile from a drainage area of 5.4 

square miles.

Plash floods occurred on Moses Creek in Washington about May 20 and on June 10. It 

is difficult to say which flood was the more destructive, although the second was the 

greater in discharge. According to Mr. William R. Van Dersal, acting regional conservator, Soil Conservation Service, i-t was "one of the worst flash floods of record.... 

Several miles of track and many bridges were destroyed on a branch line of the Great 

Northern Railway. One life was lost. There was considerable damage to county roads and 

bridges, farm property, etc..." The second flood was caused by the same storm that 

caused.the flood in Pine Canyon Creek. The reported rainfall for June 11 at Waterville, 

which is practically on the divide between Moses and Pine Canyon Creeks, was 2.79 inches. 

According to local residents, the greater part of this rain fell early in the evening of 

June 10.

Damage to highways and railroads was widespread. Many bridges were destroyed or 

damaged, and several major structures were declared unsafe during the flood period. 

Railroad service was suspended in many communities when railroads were washed out or 

rendered unsafe. Although local train service in the vicinity of Portland, Oreg., was 

suspended during the flood, train service was maintained with minor delays between Portland and points south by the Southern Pacific Company and between Portland and points
12 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

east by the Union Pacific Railroad Company through the use of a temporary east-side terminal in Portland.

No serious power shortages resulted during the flood, except for temporary disruptiqn of service in some areas due either to the flood or to lightning. The output at 

Bonneville and Grand Coulee plants was diminished by lessening of head due to high river 

stages. On the other hand, flood conditions caused curtailment in loads as a result of 

closing down of some of the industrial plants that were flooded or threatened with flooding. Power was made widely available through regional integrated operation of the power 

system, so that the curtailment in demand for power tended to offset the reduction in 

power output.

Telephone communication was disrupted in several areas when telephone lines were 

blown down by high winds or damaged by the flood. On June 2 the cable of the Pacific 

Telephone and Telegraph Co. across the Columbia River broke between Portland and Vancouver.

Communication and transportation facilities in the national forests were disrupted 

to such an extent that the Forest Service would have been greatly handicapped in fighting a serious forest fire had one occurred during the flood period. Fortunately, the 

general precipitation and high humidity that prevailed greatly reduced the severity of 

fires.

Radio station KPDQ, Portland, was flooded off the air. Station KPQ, Wenatchee, 

Wash., maintained its schedule by using floating transmitters on five large life rafts. 

Daily stage forecasts were broadcast by the United States Weather Bureau at Portland. 

Amateur radio operators set up emergency communication networks in several flooded 

areas.

The Portland airport and the adjacent military airport, just northeast of Portland, were inundated during the flood. On May 30 the Portland airport was closed because of flood hazard. On May 31 evacuation of the field was ordered by the Corps of 

Engineers, as only the dike of Multnomah County drainage district protected the airports 

from the water that flooded Vanport. On June 11 the dike broke at a point where the 

district's pump house was built within the dike, about 2 miles west of the airports. 

Attempts to close the breach were unsuccessful. The released water spread over an area 

of at least 10,000 acres, completely covering both airports. At the crest of the flood 

water stood 8 to 10 feet deep at the main passenger buildings and offices. The Portland 

airport was out of service from May 30 to September 3; use of the airport was not resumed by all regular airlines until about September 9.

Property adjacent to the airports was also flooded, including some small factories 

and food-processing plants, many homes, and most of the Alderwood, Broadmoor, Colwood, 

and Riverside golf courses. There was no widespread destruction of buildings as at Vanport. The water rose slowly, and current was not perceptible after the peak was reached.

One of the hazards of the flood was the threat to public health through contamination of water supply. Residents in all flooded areas were advised to boil their drinking 

water, and portable chlorinators were used in some areas. Vaccination for typhoid fever 

was made available in many communities affected by the flood. Prompt measures were taken 

by the Red Cross and local health officers to forestall outbreak of epidemic disease, and 

none occurred. No serious food shortages were reported.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 13 

FLOOD DAMAGE

At least 51 lives were lost as a result of the flood. House Document 308 Review 

Report, prepared by the Corps of Engineers as of October 1, 1948, based on a survey made 

immediately after the flood, states that 50 lives were lost. One more body was found 

subsequently at Vanport. Loss of life at Vanport was at least 16.

The Red Cross reported the following figures: 712 homes destroyed, including 490 

Government-dwned buildings at Vanport containing 6,809 dwelling units; 4,482 homes 

damaged; 38,500 persons made homeless; 53,495 persons given emergency care; and 9,190 

families registered as assisted by the Red Cross. The number of persons represented as 

being given emergency care were those in Red Cross shelters and in hoirfes of friends and 

relatives that were known to the Red Cross. The number of families represented as being 

assisted by the Red Cross were those who received rehabilitation assistance and who may 

or may not have received emergency care. According to the Oregon Journal for December 

26, 1948, the Red Cross spent nearly $3,500,000 for flood relief from Yakima, Wash., to 

Astoria, Oreg. and reckoned the disaster as the greatest since the Ohio and Mississippi 

flood in 1937.

Immediately after the flood, surveys of flood damage were begun by the Corps of 

Engineers, Department of Agriculture, and various state and county agencies and other 

organizations. Field surveys of damage have been largely completed, but final figures 

are not yet available. Figures of flood damage available for inclusion in this report 

are preliminary estimates.

The tabulation of flood damage by basins, presented in table 1, was abstracted from 

the report of the division engineer of the North Pacific Division, Corps of Engineers, 

as contained in House Document 308 Review Report.

Table 1.- Preliminary estimate of flood damage 

[From table 11-19, House Document 308 Review Report]

Location

Cl rk Fork

Columbia River:

Backwater, Wlllamette River (Portland and vicinity)

Acreage 

Inundated

89,000

44,000

26,000

28,000

21,000

8,000

18,000

27,000

3,000

22,000

27,000

15,000

3,000

57,000

71,000

30,000

16,000

5,000 

72,000

582,000

Flood 

damage

$4,380,000

5,792,000

848,000

2,000,000

2,435,000

4,172,000

250,000

2,282,000

200,000

875,000

350,000

175,000

150,000

1,475,000

18,670,000

1,940,000

38,796,000

10,275,000 

7,660,000

$102,725,000

Little information is at hand regarding direct losses incurred by industries. 

Damage to the Diamond Match Co.'s mill in the vicinity of Cusick, Wash., was estimated 

at $300,000. Several shipyards along the Columbia were closed, although the extent of 

flood damage is not yet known. Six Federal fish hatcheries reported heavy damage to 

buildings, holding ponds, and water-supply facilities.

The Corps of Engineers estimated that 582,000 acres of land was inundated during 

the flood. An item in the July 22, 1948, issue of the Engineering News-Record stated
14 FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

that more than 150,000 acres of diked lands, including both agricultural and industrialized areas, were saved from inundation by dikes. Another item in the July 1, 1948, 

issue of the same publication stated that the Corps of Engineers had saved the 

$43,000,000 aluminum plant at Troutdale, Oreg., by dumping 29,000 cubic yards of gravel 

across Columbia River Slough near Portland.

The Department of Agriculture estimated physical damage to land as follows: about 

250,000 acres of farm land inundated, resulting in loss of growing crops in addition to 

damage to improvements; 4,250 acres^ of land lost through stream-bank erosion, and an 

additional 19,000 acres damaged by deposition; and 161 million tons of top soil washed 

away. As an indication of the extent of movement of silt and debris, the flood deposited 

about 120,000 cubic yards of sand, silt, and rock in The Dalles-Celilo Canal.

Damages in national forests have been estimated by the United States Forest Service 

to be $6,368,300. Two regions, of three, reported physical damage to about 2,500 miles 

of roads, about 7,000 miles of trails, and about 300 bridges.

The following figures were taken from the report of a survey of flood damage in 

Washington made by the Washington National Guard: damaged or destroyed 4,471 homes 

and 21 cabins, 2,083 farm structures, 387 business structures, 117 industrial properties, 

21 public buildings, 11 water systems, 2 power systems, 87 bridges, and more than 700 

miles of road. Loss and damage to crops and pasture was estimated as about $8,000,000. 

Total community loss was estimated as $43,675,490.

Actual losses in Oregon through flooding of farm land have been estimated as 

$3,061,500 by the Oregon State College Extension Service, and an additional $2,926,000 

has been estimated as the value of potential losses for 1948 and 1949. Crops on S2,550 

acres were destroyed by innundation. The assistant State highway engineer of Oregon 

furnished an estimated figure of $492,000 as the amount of damage to State highways in 

Oregon, of which $380,000 represents damage in the vicinity of Portland.

About 40,000 acres of diked land in the Kootenai River Basin was flooded. Damages 

were estimated at $15,000,000. Estimated crop loss Included more than 1,000,000 bushels 

of wheat.

Break-down of losses to all railroads is not available at this time, but reports 

from railroad companies in the basin indicate that their losses may have been about 

$5,000,000. Probably the greatest single item of damage was the wash-out of track and 

many bridges of the Mansfield branch of the Great Northern Railway along Moses Creek east 

of Wenatchee, Wash., as the result of a cloudburst. The cost of rebuilding this line has 

been estimated at about $1,000,000.

The Pacific Telephone & Telegraph Co. reported that major damage to long-distance 

lines occurred at Vanport and at The Dalles. About 2,700 telephone stations and about 

60,000 feet of cable, varying in size from 11 to 600 pairs, were put out of service. 

About 2,700 feet of buried cable was destroyed at Portland Airport, and a 9-position 

switchboard with equipment was destroyed at Vanport.

Portland General Electric Co. reported outages on the overhead system as follows: 

5.8 miles of 57,000-volt lines, 15 days; 13.0 miles of 11,000-volt lines, 1 to 4 months; 

and 35.0 miles of smaller lines, 5 days to 4 months. Considerable damage to underground 

cables was reported. The general superintendent stated that "an Immense amount of preparatory work was done in anticipation of the flood by plugging duct lines and installing
METEOROLOGY 15

temporary pumps." These precautions doubtless prevented much greater damage. >

The Western Union Telegraph Co. reported loss of two minor cables in Portland. 

Service was operative during the entire flood period except possibly for brief interruption of some minor service.

Damage caused by the intense storm on June 9 in the basins of Black Horse and 

Butter Creeks in eastern Oregon was estimated at $35,900 by the United States Soil 

Conservation Service. Several severe local storms occurred in the basin of Thlrtymile 

Creek in eastern Oregon during the period June 9-15. On June 10 two persons were 

drowned in a small tributary of Thirtymile Creek. Damage in this basin as a result of 

these storms was estimated at "well over half a million" dollars by the Condon ^Oi-egJ 

Globe-Times of June 18.

The total flood damage in 1948 in the part of the Columbia River Basin in the 

United States was estimated as nearly $103,000,000 by the Corps of Engineers. Damages 

in British Columbia including the Praser River Basin was about $18,000,000, according 

to a report by C. E. Webb, district chief engineer, Dominion Water and Power Bureau, 

Vancouver, British Columbia.

The historic flood of 1894 was higher than the flood of 1948 by 3.0 feet at Portland and by 7.8 feet at The Dalles. An article in the Tacoma ^WashJ Daily Ledger for 

June 10, 1894, stated that the damage in the Northwest was conservatively estimated to 

be $5,200,000, of which $2,800,000 was in damage to railroads. It wae noted that the 

greater part of this loss occurred below the mouth of Snake River. The railroads were 

rebuilt oh higher ground insofar as possible, which minimized their losses in the flood 

of 1948. However, as the basin developed, it has been the tendency for communities to 

encroach on the flood plains of the rivers (see pi. 4); hence the loss of homes and 

other property was high in 1948. It has been estimated by the Corps of Engineers that 

a recurrence of a flood of the magnitude of the flood of 1894 would cause damage amounting to more than $350,000,000. Greater floods than that of 1948 have swept through the 

Columbia River Basin in the past; greater floods or at least the conditions to produce 

them will probably recur in the future.

METEOROLOGIC AND HYDROLOGIC CONDITIONS

Meteorology 

Prepared by the staff of the United States Weather Bureau

The Columbia River Basin lies in a climatic region meteorologically dominated 

by the Aleutian low and the Pacific high. One result is that precipitation in this 

basin, as along the rest of the west coast of the United States, is practically confined to the period from October to June. Over the basin the maximum monthly average 

occurs in December. The dominating centers of action, with mean positions at about 

latitudes 55° and 35°, respectively, exhibit an annual migration associated with the 

march of solar altitude, centering farthest north in summer and farthest south In 

winter. Accompanying this migration, with the seasonal variation in contrast between 

land and sea temperatures providing a major cause, Is the growth in intensity and 

extent of the Aleutlon low in winter and the simultaneous weakening of the Pacific 

high. The basin thus comes within the Aleutian low's circulation at the time of 

its greatest extent and Intensity, with the result that the basin is then exposed 

to frequent cyclonic and frontal passages Imbedded in a prevailing eastward or 

northeastward current of maritime air. The Coast and Cascade Ranges, intercepting
16 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

these currents, Intensify precipitation along their windward slopes, while elsewhere 

the normally lower Intensities may be Increased by temporary variations In such 

factors as carry-over, direction of flow, frontal passages, and Instability. Because 

of the comparatively steep lapse rates In the cool maritime air the precipitation 

falls as snow at the moderate elevations characterizing the basin, the snowfall 

normally accumulating till late spring. The typical Columbia River flood results 

from the melting in late spring of the snow pack thus accumulated in the colder months. 

Rains concurrent with the thaw may augment the flood but are seldom more than a minor 

contribution.

By April of 1948 the precipitation accumulated since October was in general 

above normal, as the result of unusually frequent cyclonic passages over the region, 

with snow pack also above normal on account of prevailing low temperatures. The magnitude of the flood that followed, however, depended to a large extent on the weather of 

the subsequent months. The critical period was approximately from the middle of April 

to the middle of June. This period can be divided into two parts, both with abovenormal precipitation, but the first half, mid-April to mid-May, had below-normal 

temperatures, while the second half, mid-May to mid-June, had above-normal temperatures. 

The two parts of the critical period were so consistently different in character that 

the differences appear clearly even in mean flow patterns such as those of the mean 

charts for 700 millibars (approximately 10,000 feet) regularly prepared by the Extended 

Forecast Section of the Weather Bureau.

The chart for the cold half of the critical period, mid-April to mid-May, showed 

air being brought to the basin from about latitude 60°, although its normal trajectory 

is from about latitude 40°. Though the air entered the basin from the west and southwest, 

it had been brought only a short distance cyclonlcally around a low-pressure center in 

the Gulf of Alaska. It was thus not only cold but had the short trajectory over water 

characterizing the most unstable maritime polar air. Heavier-than-normal precipitation 

was produced when the air was lifted by the north-south mountain ridges of the basin, 

with resulting precipitation mostly in the form of snow because of the low temperatures.

The mean map for the warm half of the critical period, mid-May to mid-June, showed 

a marked change in flow pattern. A low was established off northern California and a 

high-pressure ridge over midcontinent. Between them there was a flow from the south 

directly over the basin from latitudes 25°-30° instead of the usual latitudes 35°-40°. 

The air from so far south was warm and moist, experiencing a cyclonic flow which 

increased its instability and favored shower and thunderstorm activity. The air 

was thus in such a condition that even a small amount of lift or insolational heating 

would cause it to rise to high elevations, cool to condensation, and precipitate now 

as rain rather than snow because of the accompanying high temperatures.

Two maps (figs. 4 and 5), with concurrent temperatures plotted, have been 

selected to show typical rather than mean flow patterns during the contrasting periods. 

They are for the 850-millibar surface, at approximately 5,000 feet, which can be taken 

as the mean elevation of the basin. On the map for May 1, about the middle of the cold 

period, flow into the basin is from the northwest, with temperatures near or below' 

freezing throughout the basin. On the map for May 27, about the middle of the warm 

period, fl<jw into the basin is from the south or southeast, and temperatures in the 

basin are of the order of 70°, indicating temperatures near 90° at sea level and in
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 4 

I

A. UNITED STATES COAST GUARD RESCUING STRANDED FAMILY ON SAUVIES ISLAND IN

COLUMBIA RIVER ABOUT 20 MILES NORTHWEST OF PORTLAND, OREG.

Courtesy of The Oregonian.

B. FRUIT VALLEY HOMES, HOUSING PROJECT NEAR VANCOUVER, WASH. 

Courtesy of The Oregonian.

METEOROLOGY

COLUMBIA RIVER BASIN

H

Figure 4. Map showing air-flow pattern and air temperatures (P.) at 850 millibars 

(about 5,000 feet altitude), 7 p.m. May 1, 1948.
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

COLUMBIA RIVER BASIN

Figure 5. Map showing air-flow pattern and air temperature (°F.) at 850 millibars (about 

5,000 feet altitude), 7 p.m. May 27, 1948.
MAXIMUM TEMPERATURE OBSERVED IN MAY 1935-48

SPOKANE, WASHINGTON

POINTS ARE TEMPERATURES 

OBSERVED IN 1948

UJ 55 

CC

</>50

TREND OF_MED1

 

 

NMMTEMPERATURE OBSERVED IN MAY 1935-48

15

MAY 1948

Figure 6. Chart showing air temperatures at an altitude of 5,000 feet, at Spokane
I^AXIMyM_TEMPERATURE_ OBSERVED_[N_MAY_I_9392 48

BOISE, IDAHO

POINTS ARE TEMPERATURES 

OBSERVED IN 1948

z

U455

o: 

30 MINIMUM TEMPERATURE OBSERVED IN MAY 1939-48

i i i

15 

MAY 1948

30 

Figure 7.--Chart showing air temperatures at an altitude of 5,000 feet at Bois
PRECIPITATION 21

the 50'a at 10,000 feet far above freezing throughout the range of altitudes.

There were Interesting day-to-day variations from the synoptic patterns presented. 

In the cold period some days were comparatively dry, others comparatively wet. In both 

cases, as In the mean pattern, a low was centered north of latitude 45° and east of 

longitude 140°. When the low was off the coast the flow over the basin was from the 

southwest, cold but with heavy precipitation. When the low was Inland flow was from 

the northwest, still cold but with less precipitation. An important difference was 

the greater moisture content of the current from the southwest and its instability 

due to- short water trajectory. During the warm period the low was characteristically 

centered farther south, near northern California. When off the coast its Induced 

flow from the south brought air of great moisture content to the basin, with resultant 

heavy rainfall. As the low moved eastward into the continent the northward flow was 

more and more from a continental source, bringing somewhat warmer but now drier air, 

with less rainfall.

With the snow pack already of above-normal depth In early April, the two periods 

described provided an unusually efficient combination of factors to intensify the flood 

flow. During the cold period the snowfall was heavy, while the cold temperatures 

prevented the melting that normally begins In this period. Thus the early snow-melt 

contribution, ordinarily discharged from the soutnern tributaries and carried out to 

sea before the arrival of snow-melt discharge from the upper Columbia, was held up. 

When the warm period came, melting took place over the entire basin simultaneously, 

Increasing the snow-melt discharge at the mouth. To the snow melt was added the runoff 

from concurrent rainfall.

Part of the unusual sequence of circumstances combining to make this flood of the 

first magnitude is illustrated in the graphs of the variation of temperature, from 

May 1 to June 15, at 5,000 feet at two radiosonde stations in the basin, Spokane and 

Boise (figs. 6 and 7). The solid line shows the normal trend of the median temperature, 

the temperature exceeded 50 percent of the time. Dashed lines show the extreme maximum 

and minimum observed temperatures for May at this level, for the period of upper-air 

record through 1948. The dots show the actual temperatures observed during 1948. Most 

of the 1948 observations fall below the median during the first half of May and above 

the median thereafter. Furthermore, the observed May 1948 temperatures include the 

extremes of record at Boise and closely approach the extremes at Spokane with the lowest 

observed at the beginning of the month and with the highest observed at the end of the 

month at each station. The abruptness of such a change emphasizes the Infrequency of 

the combination of events which produced the 1948 flood.

Precipitation

Water content of snow as Indicated by snow surveys on or about April 1, 1948, 

although above normal, was not significantly different from that on April 1, 1946, when 

considering the Columbia River Basin as a whole. In some areas in the basin the water 

content even on April 1, 1947, was comparable to, or even greater than, that on April 1, 

1948.

On April 1, 1946, the Soil Conservation Service forecast "Throughout Columbia 

Basin, especially in Oregon, Washington, and British Columbia, unusually high river 

stages can be expected. Potential flood hazard exists In aome areas along the east
22 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

and west slopes of the Cascades and along the lower reaches of Kootenal River........"

The Weather Bureau forecast "near-normal precipitation from April through June will 

result in above-normal water supply over virtually the entire Columbia Basin........

while precipitation near the record maximum will result in flows considerably above 

normal but, with the exception of the Spokane, nowhere approaching the record maximum...

On April 1, 1948, the outlook for high runoff was quite similar. Conditions did 

not yet point to the imminence of a major flood. The Department of Lands and Forests, 

Water Rights Branch, British Columbia, forecast "The runoff Indicated for the Kootenay, 

Columbia, and tributary drainage......will be above normal, providing normal temperatures and precipitation prevail during the runoff period. On account of the lateness 

of the spring, the possible Increase In snow since the end of March, and the lack of 

snow melt to date there is a potential flood hazard on the Kootenay River......particularly if high temperatures or excessive precipitation occur from now on. If the snow 

is given a chance to melt slowly there should be no hazard." The Weather Bureau forecast that "Based on the assumption of near-normal precipitation for the remainder of 

the water year, the Columbia Basin above Brand Coulee and the Clearwater |_in Snake 

River Basin] will have much above normal runoff, approaching in places the maximum of 

record......" The Soil Conservation Service forecast that "The above-normal snow pack

Lin the upper Columbia Basin] could cause relatively high river stages this year....

Relatively high water may again be expected in Kootenai River. Flood protection 

measures are warranted......"

By May 1, 1948, differences between flood-producing factors in 1946 and 1948 

were apparent. Increases in water content of snow at higher altitudes during April 

were generally greater in 1948 than in 1946, and decreases at lower altitudes were 

less. Runoff in April 1946 was somewhat higher than normal and valley precipitation 

less than normal, which tended to ease the flood hazard, whereas opposite conditions 

prevailed in April 1948, so that by May 1, 1948, a flood of damaging proportions-was 

almost a certainty. Flood forecasts by the Weather Bureau and Soil Conservation 

Service as of May 1, 1948, are presented in greater detail on page 5.

Precipitation during the 1948 flood period was doubtless a prominent factor in 

producing the flood. Figure 8 presents an loohyetal map of Columbia River Basin 

showing total precipitation during the period May 16-31, 1948. Figures 9 and 10 show 

daily precipitation at various points in the basin during the period January 1 to 

June 30, 1948. No snow surveys were made in the basin after May 1, and only the 

regular United States Weather Bureau precipitation records are available after this 

date; however, it is known that snow fell at higher altitudes even after May 1, owing 

to the subnormal temperatures that prevailed until May 15. During May precipitation 

was considerably above normal over the parts of the basin where the flood was most 

severe. In Washington precipitation measured at regular United States Weather Bureau 

stations averaged 5.26 inches In May 1948 as compared with 1.02 inches in May 1946; 

precipitation at two widely separated Weather Bureau stations in Yakima River Basin 

averaged 5.00 Inches in May 1948 as compared with 2.01 inches in May 1946. in northern 

Idaho Weather Bureau precipitation records indicated an average of 5.51 Inches in May 

1948 as compared with 1.66 inches in May 1946 and in the Columbia River Basin in 

western Montana 3.33 inches In May 1948 as compared with 1.27 Inches In May 1946.
PRECIPITATION

Figure 8.--Isohyetal map of Columbia River Basin showing total precipitation. In inches,

May 16-31, 1948.
CRANBROOK, BRITISH COLUMBIA

REVELSTOKE, BRITISH COLUMBIA

I SIO 20 

^JANUARY

10 20 

FEBRUARY

10 20 

MARCH

10 20 

APRIL

Figure 9.--Dally precipitation at various precipitation stations of the united States Weather Bureau In 

Canada,In British Columbia, January 1 to January 30, 1
I 10 20 

JANUARY

10 20 

MARCH

10 20 

APRIL

Figure 10. Dally precipitation at various precipitation stations of the united States Weather Bur

to June 30, 1948.
26 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVKR BASIN

Although the water content of the anow on May 1 ia an index of the volume of 

seaaonal runoff that may be expected, it doea not neceaaarily indicate the probable 

runoff pattern, which ia determined to a great extent by temperatures during May and 

June. Temperatures associated with the flood are diacuaaed elaewhere in thia report.

Late aeasonal snowfall aeems to present a greater flood hazard than early seasonal 

snow, which aettlea into a denae pack. For a given depth of water in the snow on May 1, 

there appeara to be aome correlation between change in water content during April and 

volume of aubsequent flood runoff.

The two snow couraea in the Kootenai River Baain in Montana that were meaaured 

on May 1 in both years showed alightly greater water content on May 1, 1946, than on 

May 1, 1948; yet the average change during April 1946 was zero, while during April 1948 

there was an average gain of about 2 inchea. The runoff of Kootenai River at Leonia, 

Idaho, during May and June was 9.32 inches in 1946 and 12.06 inches in 1948. Peak discharges were 77,000 second-feet on May 30, 1946, and 123,000 second-feet on May 28, 1948.

In Yakima River Basin in Washington, five snow courses measured on May 1 showed 

slightly greater water content in 1946 than in' 1948. Two of these courses, which were 

also measured on April 1, showed an average loss in water content of 10 inches during 

April 1946, while the loss during April 1948 was less than 2 inches. The runoff of 

Yaklaa River at Kiona, Wash., during May .and June was 3.30 inches in 1946 and 5.24 

inches in 1948. Peak discharges were 15,300 second-feet on May 29, 1946, and 37,900 

second-feet on May 31, 1948.

In Fend Oreille River Basin in Idaho and Washington, five snow courses measured 

on May 1 showed appreciably more water content in 1946 than in 1948. One of these 

courses, which was also measured on April 1, showed a loss of 6.7 inches in water 

content during April 1946 and a loss of only 1.9 inches during April 1948. The runoff 

of Fend Oreille River below Z Canyon, near Metaline Falls, Wash., during May and June 

was 6.71 inches in 1946 and 10.17 inches in 1948. Peak discharges were 88,300 secondfeet on June 8, 1946, and 171,300 second-feet on June 13, 1948.

Table 2, taken from "Federal-State Cooperative Surveys and Irrigation Water 

Forcasts," by the Soil Conservation Service, lists water content of snow at courses 

measured on or about April 1 for the years 1946, 1947, and 1948. Snow surveys were 

also made on or about May 1 at a smaller number of courses; hence data for April 1 

are shown because greater coverage is afforded. The last column of the table shows 

change duriitg April 1948 for courses also measured on May 1, so water content as of 

May 1, 1948, can be computed if desired. A few courses in the basin are measured only 

on May 1 and not on April 1; data for these courses do not appear in the table.

Figure 11 presents a map of the basin showing water content of snow on or about 

April 1, 1948, based on data in table 2.

As the flood of May-June 1948 in the Columbia River Basin was the greatest 

basin-wide flood since that of 1894, and because of the similarity in occurrence of 

the two floods,.a comparison of the precipitation in the two flood years is of interest. 

Plate 5 presents maps of the basin showing total precipitation at a number of corresponding points during the period October 1 to May 31 in 1893-94 and in 1947-48. 

Figure 12 shows cumulative monthly and average precipitation for various United States 

Weather Bureau precipitation stations for October 1 to June 30, 1893-94 and 1947-48.
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1060 PLATE 5

,. >

f .Cranberry Loke

Sf Polebrid 

t 1586(3

Spohane 

23 59 (1954) 

I 

,Rosalia

2560(2500) 

Colfax I 

2572 (I973>« 

se. 1971 (1546)! MOSC

Yello«stone_Pai 

f 10*4(6239)

 ^ Island Park DarriT I "*- 

21.10(6300) ! I

TOTAL PRECIPITATION, IN INCHES 

OCTOBER I. IB93. TO MAY 31

TOTAL PRECIPITATION, IN INCHES 

OCTOBER 1,1947, TO MAY 31,1948

MAPS OF COLUMBIA RIVER BASIN, SHOWING TOTAL PRECIPITATION DURING THE PERIODS OCTOBER I TO MAY 31, I893-94.AND 1947-48

824933 O - 49 (Face p. 26)
PRECIPITATION

45°

Figure 11. Map of Columbia River Basin showing depth, in relation to average, of water 

content of snow on the ground about April 1, 1948.
28 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH APRIL 

_ __ _ NORMAL

MAY JUNE

Figure 12. Cumulative monthly precipitation for various precipitation stations of 

the United States Weather Bureau for October 1 to June 30, 1893-94 and 1947-48.
PRECIPITATION 29

Table 2. Equivalent depth of water, in Inches, determined by snow surveys about

April 1

Snow course

COLUMBIA RIVER MAIN

STEM

Blackwater Creek

Blackwater Lookout

Canoe River

Beaverfoot

Farron

Perguson

Field

Glacier

Invermere

Middle River

Mission Creek

Old' Glory

Revelstoke

Revelstoke Mountain

Sinclair Pass

KOOTEHAI RIVER BASIN

Baree Mountain

Bluebird Basin

Fergus on

Fernle

Gray Creek

Klmberly

Lardeau

Marble Canyon

Nelson

Red Mountain

Sandon

Sinclair Pass

Smith Creek

Sullivan Mine

Upper Elk River

PEND OREILLE RIVER

BASIN

Main stem-dark Fork

Chessman Reservoir

East Pork ranger

station

Intergaard

Limestone Pass

Medicine Creek

North Fork Jocko

Plpestone Pass

Rainy Lake

Skalkaho Summit

Slide Rock Mountain

Southern Cross

Stemple Pass

Storm Lake No. 2

Stuart Mill

Stuart Mountain No. 1

Tenmlle Creek, Upper

Main stem-Pend

Oreille River

Baree Mountain

Bent on Meadow

Bent on Spring

Boyer Mountain

Bunchgrass Meadow

Freezeout Summit

Hoodoo Creek

Lookout

Mosquito Ridge

Nelson

Smith Creek

Bitterroot River

Basin

East Pork ranger

station

Gibbons Pass

Mud Creek Pasture

Nezperce Camp

Nezperce Pass

State 

or 

Province

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

Mont.

Mont.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

B.C.

Mont.

B.C.

B.C.

Idaho

B.C.

B.C.

Mont.

Mont.

Mont.

Mont.

Idaho

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Idaho

Idaho

Wash.

Wash.

Mont.

Mont.

Idaho

Idaho

B.C.

Idaho

Mont.

Mont.

Mont.

Mont.

Idaho

Lat. and Long, 

or 

Sec. Twp. Rge.

51*34'-117 C 23'

51*34 I -117 C 23 I

52°51 I -119 C 08 I

Sl'ie'-llS'SZ'

49 C 17'-118C 07'

50°40 I -117 C 30 1

51 C 20 I -116 C 33 I

51 C 14 1 -117 C 29' so-sa'-iie'ie 1

51 0 17 l -liac 00 1

500 01 1 -118C 59 I

49°09 I -117 C 54 I

50C 54'-118C 16'

51 0 04'-118 C 16'

50C 41'-115°59 I

1 25N 31W

24 37N 26W 50C 40'-117 C 30'

49 C 31'-115C 01'

49C 37'-116C 41'

49°42£'-116c OO l

50C 36'-117C 16'

51 C 12'-116C 09'

49C 25 I -117 C 14 I

4 36N 29W

490 59'-117 C 13'

50 C 41'-115C 59'

29 64N 3W

490 43'-116C 00'

50C 01'-114C 55'

2 8N 5W

16 2N 17W

6 5N 13W

3,4 17N 15W

24 43N 10E

3 17N 17W

11 IN 7W

11 18N 16W

30 6N 17W

26 ION 16W

9 5N 13W

16 15N 7W

19 4N 13W

19 5N 13W

6 14N 18W

19 8N 5W

1 25H 31W

27 58N 4W

30 58N 3W

7 31W 43E

24 37N 44E

21 15N 27W

9,16 14N 27W

4 47N 6E

5 54N 2E 49 C 25 1 -117 C 14 I

29 64N 3W

16 2N 17W

4 2S 19W

24 UN 24W

19,20 IS 23W

32 28N 16E

Elevation 

(feet)

5,200

5,500

3,000

6,200

4,000

3,000

3,800

4,100

3,500

2,250

6,000

7,000

1,800

6,000

4,500

6,000

6,800

3,000

3,500

5,100

3,750

6,000

5,000

3,050

6,000

3,500

4,500

4,800

5,100

-

6,200

5,400

6,450

7,000

6,200

6,330

7,200

4,300

7,258

7,100

6,500

6,900

7,780

6,500

7,400

8,000

6,000

2,344

4,900

5,250

5,000

7,000

6,200

5,250

5,110

3,050

4,800

5,400

7,100

4,500

5,580

6,575

Average prior 

to 1948

No. of 

years

_

_

7

_

10

10

9

11

8

6

10

-

10

1

12

9

9

10

11

_

10

13

1

10

9

10

12

9

2

-

12

9

3

_

8

7

9

1

9

11

3

9

9

3

11

12

9

11

11

2

8

11

11

11

11

10

9

9

9

11

11

11

Depth.

_

_

3.2

_

9.7

18.3

3.6

21.5

4.1

13.2

17.7

.

8.1

-

4.6

34.7

32.9

18.3

6.7

-

4.1

14.2

_

11.7

16.2

10.0

4.6

38.1

13.5

-

4.0

3.6

6.3

-

33.0

36.6

5.3

-

20.7

12.2

2.9

8.6

13.1

4.3

28.2

12.3

34.7

1.2

18.1

26.4

27.5

28.4

42.4

29.4

32.1

11.7

38.1

3.6

20.6

5.1

11.8

15.4

1946

_

_

3.0

_

15.7

31.1

6.4

32,9

6.1

18.5

25.6

-

14.3

-

6.9

46.8

50.6

31.1

9.7

-

6.5

16.6

_

18.7

21.1

14.4

6.9

57.7

13.4

-

2.4

3.0

6.2

-

37.7

48.5

5.7

_

23.7

13.7

3.2

8.6

14.0

5.0

35.6

10.8

46.8

1.0

29.4

35.6

38.1

34.2

53.0

41.8

42.1

18.7

57.7

3.0

25.4

4.1

11.9

14.9

1947

_

-

4.0

_

6.5

26.4

6.0

30.5

4.8

15.3

17.9

-

13.4

47.6

4.7

51.5

40.5

26.4

7.5

-

4.9

16.3

11.3

13.3

23.2

12.3

4.7

51.4

13.6

-

4.7

5.5

7.0

-

46.4

52.0

7.0

10.1

29.9

16.6

3.4

13.0

17.6

4.9

38.2

17.5

51.5

0.0

16.3

17.1

29.1

39.8

57.2

36.8

33.3

13.3

51.4

5.5

26.8

0.0

12.9

20.8

1948

16.3

16.8

6.0

6.6

10.8

20.1

5.4

24.8

4.5

15.6

21.9

19.0

12.8

45.2

4.1

40.6

36.8

20.1

8.4

19.6

5.5

16.1

13.2

15.0

19.2

11.4

4.1

42.2

14.7

9.1

9.2

6.5

10.2

43.6

40.3

46.2

7.4

11.0

29.2

19.2

6.8

10.3

19.7

9.2

37.5

18.1

40.6

1.5

22.5

25.1

25.5

33.7

42.7

37.5

31.5

15.0

42.2

6.5

24.7

8.7

14.9

23.6

Change 

during 

April 

1948

_

_

_

_

-7.1

-1.6

-

+2.4

-

_

_

-

-

+3.9

-3.3

+6.6

_

-1.6

-4.5

+0.4

-

-

-1.1

-

-3.0

-7.2

-3.3

_

-4.8

-3.6

-4.6

-6.5

_

-

-

_

_

-

-2.5

_

_

-2.0

+1.5

_

-6.3

-3.5

+6.6

-1.5

-1.9

-

-3.1

-

_

-2.7

+3.1

_

-

-6.5

-3.4

_

-7.1

-8.5
FLOODS OP MAY-JUIJE 1948 IN COLUMBIA RIVER BASIN

Table 2.--Equivalent depth of water, In inches, determined by snow surveys about

April 1 Continued

Snow course

PEND OREILLE RIVER

BASIN Continued

Bitterroot River

Basin Continued

Packers Meadow

Skalkaho Summit

Stuart Mountain No. 1

Plathead River Basin

Big Creek

Cattle Queen

Desert Mountain

Goat Mountain

Hell Roaring Creek

Divide

Kishenehn

Limestone Pass

Logan Creek

Marias Pass

North Pork Jocko

Rainy Lake

Spotted Bear Mountain

Strawberry Lake

Trinkus Lake

Trout Lake

Upper Columbia snow

laboratory, station

13

SPOKANE RIVER BASIN

Above Burke

Above Roland

Below Roland

Copper Ridge

Forty-Nine Meadows

Fourth of July Summit

Kellogg Peak

Lookout

Medicine Creek

Mosquito Ridge

Roland

Sherwln

Sunset

SANPOIL RIVER BASIN

Sherman Creek Pass

OKANOOAN RIVER BASIN

Aberdeen Lake

Bouleau Creek

Brookmere

Preezeout Meadows

Harts Pass

McCulloch

Mutton Creek No. 1

Mutton Creek No. 2

Rusty Creek

Salmon Meadows

Summer-land Reservoir

Trout Creek

METHOW RIVER BASIN

Dagger Lake

Harts Pass

Mutton Creek No. 2

Rusty Creek

Salmon Meadows

CHELAN LAKE BASIN

Agnes Creek

Bridge Creek

Bridge Creek Trail

Bullion

Cloudy Pass

Cottonwood

Dagger Lake

State 

or 

Province

Idaho

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Mont.

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Wash.

B.C.

B.C.

B.C.

Wash.

Wash.

B.C.

Wash.

Wash.

Wash.

Wash.

B.C.

B.C.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Lat. and Long, 

or 

Sec. Twp. Rge.

15 38N 15E

30 6N 17W

6 14N 18W

6,7 22N 18W

7 35N 17W

24 31N 19W

47°31'-112°55 r

35 32N 22W

7 37N 21W

3,4 17N 15W

34 30N 24W

48 0 19 I -113°21 I

3 17N 17W

11 18N 16W

23 25N 15W

11 28N 19W

9 25N 17W

22 28N 17W

10 29N 14W

11 48N 5E

35 47N 6E

34 47N 6E

5,6 50N 1W

6 43N 5E

6 49N 1W

19 48N 3E

4 47N 6E

24 43N 10E

5 54N 2E

26 47N 6E

28,33 42N IE

28 49N 5E

19 36N 35E

50 0 08 I -119°03 I

50°16'-119 0 35 I

49°49 1 -120°52 I

8 40N 16E

7 37N 18E

50 0 01'-118 0 59'

30 37N 24E

19 37N 24E

18 35N 24E

33 37N 24E

490 50'-120 0 02'

49 0 46 I -120°12 I

48°28'-120 0 39'

7 37N 18E

19 37N 24E

18 35N 24E

33 37N 24E

48"12 I -120 0 56 I

48 0 26'-120 0 52'

48°27'-1200 52'

48°23'-1200 49 l

48°12'-120 0 55'

48 0 27'-120°58'

48°28 1 -120°39 I

Elevation 

(feet)

5,700

7,258

7,400

6,750

4,700

5,600

7,000

5,770

4,300

7,000

4,300

5,250

6,330

4,300

7,000

6,500

6,500

3,700

5,240

4,100

4,350

3,770

4,800

5,000

3,100

5,560

5,250

6,200

5,110

5,200

3,200

5,600

5,350

4,300

5,000

3,200

6,000

6,500

6,000

5,700

6,000

4,000

4,500

4,300

4,700

5,200

6,500

6,000

4,000

4,500

5,400

2,100

2,680

1,460

6,500

2,500

5,200

Average prior 

to 1948

No. of 

years

11

9

11

6

9

9

9

6

2

_

9

12

7

1

-

-

-

_

2

17

18

18

12

11

22

17

11

8

11

21

22

25

9

12

1

3

4

7

10

8

2

4

8

12

12

16

7

2

4

8

16

17

17

17

17

17

16

Depth

18.8

20.7

28.2

34.4

27.2

13.2

8.6

28.0

7.2

_

6.9

15.5

36.6

_

_

-

-

_

14.4

16.7

23.6

11.4

27.7

30.7

9.1

24.8

29.4

33.0

32.1

32.4

11.2

29.2

12.4

5.6

_

8.9

24.7

36.5

17.7

10.3

13.0

5.1

8.2

8.1

6.3

36.0

36.5

13.0

5.1

8.2

43.6

18.3

23.2

5.1

39.7

29.7

36.0

1946

22.4

23.7

35.6

46.0

39.4

15.3

9.9

36.4

5.6

_

8.6

17.7

48.5

_

_

_

_

_

10.4

24.1

34.7

18.3

38.8

44.6

12.7

37.0

41.8

37.7

42.1

44.6

17.6

38.6

19.2

7.9

_

12.1

32.3

51.8

25.6

14.8

16.3

9.4

13.8

12.9

9.2

48.7

51.8

16.3

9.4

13.8

60.4

30.5

37.1

8.3

60.5

47.1

48.7

1947

24.8

29.9

38.2

38.2

21.2

17.8

34.1

8.7

_

10.3

23.3

52.0

10.1

_

-

_

_

18.3

18.7

27.2

10.7

20.0

34.6

5.0

30.8

36.8

46.4

33.3

38.6

10.7

36.6

8.6

3.9

7.9

10.6

35.6

43.4

17.9

7.0

9.6

2.4

5.7

6.6

6.2

48.3

43.4

9.6

2.4

5.7

51.9

22.9

27.3

6.1

45.0

37.5

48.3

1948

24.3

29.2

37.5

45.8

31.2

14.7

11.7

28.6

5.5

43.6

10.0

18.9

46.2

11.0

15.3

43.9

47.6

14.6

13.7

18,3

25.9

12.7

30.9

35.6

9.8

28.4

37.5

40.3

31.5

31.5

11.8

28.9

9.2

5.6

9.7

7.6

39.9

45.1

21.9

9.2

11.8

3.3

6.6

7.5

7.2

42.1

45.1

11.8

3.3

6.6

63.2

24.5

25.8

8.7

51.9

34.7

42.1

Change 

during 

April 

1948

-2.3

-2.5

-6.3

_

+ .2

_

+2.4

_

_

-6.6

-3.6

_

_

_

_

_

_

_

_

_

_

+1.3

-.4

_

-2.7

+3.0

_

_

_

-

-

_

_

-.5

_

+3.1

_

+2.9

+4.1

-3.3

-1.5

_

+ .5

_

+3.1

+4.1

-3.3

-

_

_

_

-

-

_

-
PRECIPITATION

Table 2. Equivalent depth of water, In Inches, determined by snow surveys about

April 1 Continued

Snow course

CHELAN LAKE BASIN 

Continued

Greenwood Flat

Little Meadows

Lyman Lake

Park Creek Flat

Park Creek Pass

Park Creek Ridge

Pass Creek

Peters ons

Rainy Pass

Seven Mile

Two Mile

Upper Meadows

WKNATCHEE RIVER BASIN

Blewett Pass No. 2

Fish Lake

Lyman Lake

Stevens Pass

YAKIMA RIVER BASIN

Big Boulder Creek

Blewett Pass No. 2

Bumping Lake

Cayuse Pass

City Cabin

Corral Pass

Fish Lake

Fog Basin

Lake Cle Elum

North Fork Cedar

Olallle Meadows

Stampede Pass

Tunnel Avenue

SNAKE RIVER BASIN

Above Jackson Lake

Arizona

Aster Creek

Base Camp

Coulter Creek

Glade Creek

Huckleberry Divide

Lewis Lake Divide

Moran

Snake River Station

Sylvan Pass

Thumb Divide

Moran Bay

Jackson Lake to

Helse

Afton ranger station

Blackrock

Blind Bull Summit

Bryan Flat

CCC Camp

Cottonwood Lake

Deadman Ranch

East Rim Divide

Four Mile Meadows

Greys Boundary

Gros Ventre Summit

Grover Park Divide

Poison Meadow

Salt River Summit

Teton Pass No. 2

Togwotee Pass

Turpln Meadows

Yellowjacket

Helse to American

Falls

Austin Brothers

Ranch

Bechler ranger

station

State 

or 

Province

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Wyo.

Idaho

Wyo.

Lat. and Long, 

or 

Sec. Twp. Rge.

48°13 I -120°50 I

48°12'-120°54 I

48°12 I -120°55 I

480 26'-120 0 55'

23 35N 14E

48°27'-120°55 I

48°20'-120°55'

48°28'-120°43'

48°34'-120°44'

48°12'-120°44'

48°ll l -120°37'

48°13'-120 0 56'

35 22N 17E

34 24N 14E

48°12'-120°55'

14 26N 13E

35 23N 14E

35 22N 17E

46°52'-121°18 1

15 16N 10E

10 21N 10E

30 18N HE

34 24N 14E

32 17N HE

15 20N 14E

8 21N HE'

19 22N HE

25 21N HE

10 21N 12E

3 46N 115W

44°17 I -110°37'

20 46N 113W

44°09 I -110°33'

44°08 I -110°44'

32 48N 115W

44 0 13 I -110 0 40'

8,17 45N 114W

44°08 I -110°40 I

44°29'-110°02 I

44°22'-110°35 I

14 45N 116W

30 32N 118W

4 44N 111W

4 34N 115W

9 38N 115W

9 29N 118W

25 31N 118W

28 35N 116W

32 37N 111W

35 45N 112W

33 37N 118W

36 40N 111W

27 33N 118W

29 30N 116W

32 29N 118W

24 4iN new

29 44N HOW

14 45N 112W

33 42N 112W

27 7S 43E

44 0 09'-111°03'

Elevation 

(feet)

3,540

5,275

5,900

2,220

5,050

4,600

2,500

3,730

4,780

3,015

2,020

4,400

4,270

3,371

5,900

4,070

3,200

4,270

3,450

5,300

2,390

6,000

3,371

5,600

2,200

3,800

3,625

3,000

2,450

6,850

7,700

6,900

7,600

7,200

7,300

7,900

6,800

6,780

7,100

7,900

6,800

6,200

8,600

8,750

6,250

7,500

7,500

6,534

7,950

7,770

5,800

8,750

7,500

8,500

7,900

8,500

9,600

6,930

7,675

6,450

6,400

Average prior 

to 1948

No. of 

rears

17

17

16

17

3

16

16

16

16

17

17

14

2

5

16

4

7

2

29

7

-

8

5

9

9

1

3

3

7

29

29

1

29

29

29

29

29

29

9

1

29

12

12

-

12

12

12

11

12

12

12

-

12

-

-

3

12

12

11

12

11

Depth

19.9

37.8

50.5

26.1

71.7

35.3

23.8

23.0

32.5

17.7

6.8

31.0

17.0

32.1

50.5

50.7

15.3

17.0

12.1

77.2

-

34.6

32.1

41.4

2.8

_

47.7

\44.3

17.4

16.3

26.5

-

20.3

21.3

17.8

37.6

10.9

18.2

13.2

-

18.9

1.9

21.0

-

9.6

11.2

16.9

9.7

11.3

12.5

10.2

-

10.8

-

-

35.8

26.8

10.0

6.5

8.6

22.7

1946

37.2

51.8

74.1

40.5

86.0

53.4

38.5

33.2

46.7

28.4

11.6

45.4

22.5

41.0

74.1

61.9

31.3

22.5

26.2

139.5

-

53.8

41.0

70.1

10.4

_

68.9

63.9

33.0

19.3

33.0

-

21.7

22.0

19.9

44.1

11.6

19.9

12.7

-

20.9

0

22.9

-

9.4

9.0

18.2

9.2

11.6

13.4

11.5

-

9.1

-

-

34.5

28.8

9.4

5.7

8.0

25.0

1947

21.2

42.6

59.2

36.0

74.0

42.1

27.9

30.6

45.0

24.5

8.7

32.3

11.5

30.0

59.2

50.0

10.0

11.5

7.4

86.8

-

45.0

30.0

41.8

0.0

33.8

39.2

34.4

14.2

15.8

35.3

19.0

23.7

21.5

17.1

47.9

11.1

17.8

15.0

24.3

21.9

0

28.2

-

9.0

10.6

17.6

6.3

9.7

12.8

6.6

-

8.3

-

-

42.0

33.3

8.8

5.9

7.4.

17.9

1948

20.2

46.6

65.7

31.5

87.7

42.2

31.5

27.7

38.4

19.2

9.9

39.4

16.9

31.0

65.7

55.2

23.0

16.9

-

94.0

28.0

52.0

31.0

53.7

-

41.2

59.4

51.4

-

15.5

22.7

14.8

15.2

19.8

15.1

31.8

8.8

17.7

14.8

16.9

18.3

T

20.3

27.6

7.8

9.5

16.7

9.5

7.7

12.3

11.6

10.0

9.5

25.0

12.5

30.5

27.4

10.0

4.9

_

26.8

Change 

during 

April 

1948

_

-

-

-

-

-

-

-

-

-

-

-

-3.2

-

-

-

_

-3.2

-

-

-

-

-

-

-

_

_

+ .5

-

_

-

-

-

-

-

-

-

-

-

-

-

_

-

-

-7.8

-

-

-

-1.2

-

-

-

-

-

-

-

-

-

-4.9

_

-
32 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Table 2. Equivalent depth of water, in inches, determined by snow surveys about

April 1 Continued

Snow course

SNAKE RIVER BASIN 

Continued

Heise to American

Pal Is- -Continued

Big Springs

Blackfoot Dam

Blue Ledge Mine

Camp Creek

China Hat

Grassy Lake

Island Park No. 2

Kilgore

Mink Creek

Pebble Creek

Slug Creek Divide

Somsen Ranch

State line

Teton Pass No. 2

Valley View

 West Yellowstone

Tributaries below

American Falls

Badger Creek

Bear Creek Meadows

Bostetter ranger

station

Fox Creek

Magic Mountain

Seventy-Six Creek

Sub let t

Big Lost River

Basin

Copper Basin

Stickney Mill

White Knob

Big Wood River

Basin

Couch Summit

Galena

Graham Ranch

Mascot Mine

Sfildier ranger

station

Atlanta Summit

Bogus Basin

Cape Horn

Couch Summit

Galena

Moore Creek Summit

Redfish Lake

Soldier ranger station

Trinity Mountain

Owyhee River Basin

Big Bend

Buckskin, Lower

Buckskin, Upper

Fish Creek

Fry Canyon

Gold Creek ranger

station

Granite Peak

Jack Creek, Lower

Jack Creek, Upper

Martin Creek 

Rodeo Plat

South Mountain

No. 2

Taylor Canyon

Payette River Baaln

Big Creek Summit

Bogus Basin »

Crawford ranger

station

State 

or 

Province

Idaho

Idaho

Idaho

Idaho

Idaho

Wyo.

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Wyo.

Idaho

Mont.

Idaho

Nev.

Idaho

Nev.

Idaho

Nev.

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Ne .

Ne .

Ne .

Or g.

Ne .

Ne .

Ne .

Ne .

Ne .

Ne . 

Ne .

Idaho

Nev.

Idaho

Idaho

Idaho

Lat. and Long, 

or 

Sec . Twp . Rge .

34 14N 44E

1 5S 40E

27 13N 38E

21 13N 36E

17 7S 42E

6 48N 117W

28 13N 43E

6 12N 39E

33 7S 34E

34 7S 37E

15 10S 44E

25 5S 43E

32 3N 46E

24 41N 118W

7 15N 44E

34,35 13S 5E

*

21 15S 20E

31 46N 58E

6 14S 19E

3 45N 58E

14 14S 18E

6 44N 61E

8 12S 30E

24 6N 2 IE

9 6N 19E

25 7N 23E

9 2N 14E

3 6N 15E

10 5N 17E

8 4N 20E

19 2N 14E

23 5N 10E

16 5N 3E

2 12N HE

9 2N 14E

3 6N 15E

19 7N 7E

3 9N 13E

19 2N 14E

7 3N 9E

30 45N 56E

25 45N 39E

14 45N 39E

4 33S 33E

32 43N 54E

32 45N 56E

27 44N 39E

19 42N 53E

9 42N 53E

24 44N 39E 

31 43N 54E

35 7S 5W

32 39N 53E

24 15N 5E

16 5N 3E

21 14N 4E

Elevation 

(feet)

6,500

6,150

6,700

6,800

6,300

7,865

6,315

6,200

6,300

6,550

7,225

7,000

6,400

8,500

6,500

6,700

6,900

7,800

7,500

6,900

6,700

7,000

6,000

8,000

7,500

7,700

7,000

7,500

6,200

7,900

6,100

7,500

6,400

6,500

7,000

7,500

6,100

6,600

6,100

7,400

6,800

6,700

7,200

7,900

6,800-

6,600

7,800

7,000

7,250

6,700 

7,000

6,340

6,200

6,608

6,400

4,800

Average prior 

to 1948

No. of 

years

12

12

10

12

10

8

12

11

3

3

12

12

12

3

12

11

1

5

12

11

5

1

11

12

12

12

10

12

12

9

12

6

11

_

10

12

11

9

14

12

7

12

7

6

7

8

7

7

7 

6

8

7

12

6

11

Depth

19.5

8.4

15.1

8.5

6.7

29.9

14.3

10.6

12.8

13.5

15.2

11.3

15.1

35.8

14.0

10.6

.

19.0

17.8

8.0

18.8

-

12.2

9.1

8.6

9.6

17.2

12.7

14.8

11.1

30.2

25.8

17.0

_

17.2

28.9

8.7

11.1

39.4

9.9

7.1

11.2

23.7

8.9

6.1

12.0

2.8

9.9

9.7

10.6

3.6

30.0

25.8

5.5

1946

23.2

8.5

17.2

10.2

9.4

32.8

17.1

11.6

17.0

17.9

17.2

14.1

14.0

34.5

15.5

12.6

_

22.0

22.9

8.6

25.0

-

13.3

10.3

12.4

10.2

21.7

15.9

17.1

14.8

36.8

34.9

23.3

-

21.7

38.4

12.9

14.8

56.2

10.9

6.6

9.1

-

9.7

5.5

16.6

3.1

12.6

11.1

14.4

4.3

40.6

34.9

8.3

1947

20.7

4.8

17.1

6.1

0.0

29.2

15.1

6.1

6.6

7.1

12.2

9.5

11.0

42.0

14.3

10.4

9.1

15.0

14.4

2.8

12.4

6.7

-

11.6

13.4

10.4

19.0

10.4

17.9

7.1

30.9

23.1

18.0

-

19.0

32.1

10.7

7.1

41.3

3.6

0.0

1.4

-

4.4

0.0

7.2

0.0

4.2

4.2

3.6

0.0

41.2

23.1

T

1948

18.1

-

10.9

8.1

B.Z

35.6

13.8

8.4

16.2

11.5

13.3

-

13.1

30.5

12.8

-

12.2

20.0

17.2

7.6

17.4

11.2

10.3

8.5

8.0

7.4

14.3

13.9

9.9

13.2

8.9

26.7

20.4

19.6

14.3

13.9

23.0

8.6

8.9

37.5

8.3

10.2

10.4

25.1

7.9

5.8

9.7

4.7

11.6

9.1

-

.5

31.0

20.4

4.8

Change 

during 

April 

1948

.

-

-

-

_

-

-

-

_

_

-

-

-

-

-

-

_

-

-

_

-

-

-

_

-

-

_

_

_

-

-

+2.7

-

-

_

+1.7

-

-

-

_

-

-

-

-

.

_

_

-

_

-

-

.

+2.7

-
PRECIPITATION

Table 2. Equivalent depth of water, in inches, determined by snow surveys about

April I Continued

Snow course

SNAKE RIVER BASIN- -

Continued

Payette River

Basin Continued

Deadwood River Bam

Deadwood Summit

Lake Pork

Moore Creek Summit

Rock Plat Summit

Secesh Summit No. 2

Squaw Meadow

Trail Creek

Cape Horn

Malheur River Basin

Barney Creek

Blue Mt. Springs

Crane Prairie

Lake Creek

Rock Spring

Stinking Water

Weiser River Basin

Boulder Creek

Placer Creek

Burnt River Basin

Barney Creek

Blue Ht. Summit

Dooley Mountain

Tlpton

Powder River Basin

Anthony Lake

Bourne

Dooley Mountain

Eilertson Meadows

Gold Center

Goodrich Lake

Summit Springs

Taylor Green

Salmon River Basin

Big Creek Summit

Big Hole Pass

Boulder Creek

Cape Horn

Deadwood Summit

Gibbons Pass

Lemhi

Mill Creek Summit

Moose Creek

Redfish Lake

Rock Plat Summit

Secesh Summit No. 2

William Creek Summit

Imnaha River Basin

Aneroid Lake No. 1

Aneroid Lake No. 2

Coverdale

Grande Ronde River

Basin

Aneroid Lake No. 1

Aneroid Lake No. 2

Anthony Lake

Beaver Reservoir

Camp Carson

Moss Spring

Schneider Meadows

Summit Springs

Taylor Green

Toll Gate

State 

or 

Province

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Oreg.

dreg.

Oreg.

Oreg.

Oreg.

Oreg.

Idaho

Idaho

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Idaho

Mont.

Idaho

Idaho

Idaho

Mont.

Mont.

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg

Oreg

Oreg

Oreg

Oreg

Oreg

Oreg

Lat . and Long . 

or 

Sec . Twp . Rge .

8 11N 7E

23 UN 7E

3 18N 4E

19 7N 7E

1 18N 2E

34 22N 4E

8 21N 4E

19 UN 7E

2 12N HE

16 14S 36E

21 15S 35E

24 16S 34E

10 16S 33p

23 18S 32E

33 21S 34E

15 20N 1W

15,16 17N 3W

16 14S 36E

6 12S 36E

32 US 40E

34 10S 35|E

18 7S 37E

33 8S 37E

32 US 40E

18 8S 38E

21 9S 36E

34,35 8S 38E

9 6S 37E

3 6S 42E

24 15N 5E

28 3S 18W

15 20N 1W

2 12H HE

23 14N 7E

4 2S 19W

9 10S 15W

8 13N 17E

22,27 27N 21E

3 9N 13E

1 18N 2E

34 22N 4E

34 21N 20E

16 4S 45E

16 4S 45E

22 5S 47E

16 4S 45E

16 4S 45E

18 7S 37E

8 5S 37E

33 6S 36E

28 3S 41E

35 6S 45E

9 6S 37E

3 6S 42E

32 4N 38E

Elevation 

feet)

5,500

7,000

6,000

6,100

5,200

6,600

5,800

5,900

6,500

5,950

5,900

5,375

5,120

5,100

4,800

5,500

6,000

5,950

5,098

5,430

5,100

7,125

5,800

5,430

5,400

5,340

6,700

6,000

5,740

6,608

7,340

5,500

6,500

7,000

7,100

7,480

8,870

6,200

6,600

5,200

6,600

8,710

7,480

7,000

4,250

7,480

7,000

7,125

5,340

5,970

5,850

5,400

6,000

5,740

5,070

Average prior 

to 1948

Mo. of 

years

12

12

12

12

2

6

10

9

11

3

12

9

9

12

8

10

10

3

12

9

10

12

12

9

10

9

1

12

10

12

-

10

11

12

9

-

11

11

11

2

6

11

11

6

3

11

6

12

8

9

9

10

12

10

12

Depth

14.2

39.9

14.5

28.9

18.2

32.8

32.5

16.1

17.0

7.9

14.7

7.6

9.6

4.1

.8

20.9

16.2

7.9

6.6

7.8

9.0

26.2

14.7

7.8

10.8

10.2

-

20.9

15.0

30.0

-

20.9

17.0

39.9

20.6

-

18.8

14.3

8.7

18.2

32.8

11.5

34.1

27.7

8.8

34.1

27.7

26.2

10.0

8.5

23.0

27.5

20.9

15.0

25.9

1946

16.2

48.5

17.1

38.4

20.6

38.5

39.0

-

23.3

11.2

22.0

10.8

14.3

5.1

-

28.3

25.3

11.2

11.3

10.8

16.1

36.0

20.6

10.8

15.2

14.6

-

20.5

21.4

40.6

-

28.3

23.3

48.5

25.4

-

20.7

16.8

12.9

20.6

38.5

12.8

44.1

33.0

18.5

44.1

33.0

36.0

11.4

10.3

27.1

36.3

20.5

21.4

39.9

1947

16.3

48.9

10.7

32.1

15.8

40.2

38.8

14.1

18.0

5.2

10.4

2.4

4.8

0.0

0.0

19.3

13.5

5.2

2.4

1.9

1.0

30.6

9.6

1.9

6.8

6.9

31.3

21.8

12.4

41.2

-

19.3

18.0

48.9

26.8

-

22.4

20.4

10.7

15.8

40.2

13.9

38.2

29.4

0.0

38.2

29.4

30.6

8.2

5.8

18.5

20.4

21.8

12.4

21.4

1948

13.6

37.3

13.7

23.0

15.9

37.5

35.5

12.8

19.6

8.8

14. a

10.4

10.0

5.0

0.0

23.4

18.8

8.8

9.2

9.5

9.0

31.4

15.4

9.5

9.2

13.5

34.7

24.2

18.9

31.0

14.9

23.4

19.6

37.3

24.7

11.1

18.2

18.6

8.6

15.9

37.5

15.7

38.4

32.8

12.1

38.4

32.8

31.4

14.8

13.6

29.7

27.1

24.2

18.9

34.0

Change 

luring 

April 

1948

-3.3

-

-

+1.7

-

-

-

-2.6

-

_

-

-

-

-

-

_

-

_

-

-

-

_

-

-

-

-

-

-

-

_

-

-

-

-

-3.4

-

-

-5.1

-

-

-

-

_

-

-

_

-

-

-

-

-

-

-

-

-
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Table 2. Equivalent depth of water, in inches, determined by snow surveys about

April 1 Continued

Snow course

SNAKE RIVER BASIN- -

Continued

Clearwater River

Basin

Forty-Nine Meadows

Hoodoo Creek

Kit Carson Pasture

Nezperce Pass

Packers Meadow

Savage Pass

Shanghai Summit

Sherwin

WALLA WALLA RIVER

BASIN

Toll Qate

UMATILLA RIVER

BASIN

Arbuckle Mountain

Emigrant Springs

Lucky Strike

Meacham

Toll Qate

JOHN DAY RIVER

BASIN

Anthony Lake

Arbuckle Mountain

Beech Creek Summit

Blue Mountain

Springs

Blue Mountain

Summit

Derr

Dixie Springs

Qold Center

Izee Summit

Marks Creek

Olive Lake

Snow Mountain

Starr Ridge

Tipton

DESCHUTES RIVER

BASIN

Caldwell Ranch

Cascade Summit

Clear Lake

Crescent Lake

Derr

Hogg Pass

Marks Creek

New Dutchman Flat

Ochoco Meadows

Rock Creek

Snow Mountain

Three Creeks Meadows

WILLAMETTE RIVER

BASIN

Breitenbush

Cascade Summit

Champion

Clackamas Lake

Hogg Pass

Marion Forks

Marys Peak

McKenzie

Peavine Ridge

Phlox Point

Santiam Junction

Still Creek

Waldo Lake

State 

or 

Province

Idaho

Mont.

Idaho

Idaho

Idaho

Idaho

Idaho

Idaho

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Oreg.

Lat. and Long, 

or 

Sec . Twp . Rge .

6 43N 5E

9,16 14N 27W

4 27N 16E

32 28N 16E

15 38N 15E

18 36N 15E

7 37N 6E

28,33 42N IE

32 4N 38E

33 4S 29E

29 IN 35E

28 3S 32E

24,25 IS 35E

32 4N 38E

18 7S 37E

33 4S 29E

4 12S 30E

21 15S 35E

6 12S 36E

14 13S 23E

28 US 34E

21 9S 36E

28 16S 29E

25 12S 19E

14 9S 33p

1 19S 26E

20 15S 31E

34 10S 35iE

30 2 IS 8E

7 23S 6E

29 4S 9E

11 24S 6E

14 13S 23E

24 13S 7-|E

25 12S 19E

21 18S 9E

21 13S 20E

1 4S 10E

1 19S 26E

3 17S 9E

21 9S 7E

7 23S 6E

12 23S IE

35 5S 8iE

.24 13S 7|E

28 US 7E

21 12S 7W

35 15S 7|E

14,15 6S 7E

6 3S 9E

14 133 7E

25 3S a^E

15 2 IS 6E

Elevation 

(feet)

5,000

6,200

4,700

6,575

5,700

6,600

4,600

3,200

5,070

5,400

3,925

5,050

4,300

5,070

7,125

5,400

4,800

5,900

5,098

5,670

6,650

5,340

5,293

4,540

6,000

6,300

5,150

5,100

4,400

4,880

3,500

4,760

5,670

4,755

4,540

6,400

5,200

4,200

6,300

5,600

2,325

4,880

4,500

3,400

4,755

2,730

3,620

4,800

3,500

5,600

3,990

3,700

5,500

Average prior 

to 1948

No. of 

years

11

11

11

11

11

11

10

20

12

12

12

9

12

12

12

12

12

12

12

11

12

9

12

10

12

4

12

10

11

12

12

11

11

10

10

7

12

2

4

12

5

12

9

7

10

7

9

8

11

10

7

11

11

Depth

30.7

42.4

6.9

15.4

18.8

22.2

20.2

10.9

25.9

10.3

5.2

11.4

8.2

25.9

26.2

10.3

4.3

14.7

6.6

9.4

20.2

10.2

6.5

2.5

17.5

12.0

3.7

9.0

6.6

27.2

10.9

6.2

9.4

36.3

2.5

43.2

9.5

13.8

12.0

17.5

0.8

27.2

20.7

11.2

36.3

6.9

8.1

33.6

15.7

53.9

16.9

18.4

24.9

1946

44.6

53.0

_

14.9

22.4

26.7

30.4

6.2

39.9

15.6

9.5

16.4

13.1

39.9

36.0

15.6

7.0

22.0

11.3

11.5

31.1

14.6

8.9

5.1

23.9

17.7

7.5

16.1

17.1

43.9

18.4

19.5

11.5

59.4

5.1

_

16.4

21.4

17.7

31. -0

3.9

43.9

48.4

17.1

59.4

18.0

23.3

65.8

24.8

90.9

38.1

34.5

47.1

1947

34.6

57.2

6.0

20.8

24.8

33.6

24.8

8.7

21.4

3.7

0.0

10.0

.5

21.4

30.6

3.7

0.0

10.4

2.4

5.3

21.4

6.9

1.6

0.0

19.7

9.7

.3

1.0

T

21.0

1.4

0.0

5.3

35.8

0.0

_

T

6.2

9.7

14.5

_

21.0

10.1

-

35.8

3.4

.4

-

8.2

54.2

8.9

10.5

24.9

1948

35.6

42.7

10.3

23.6

24.3

32.5

33.5

11.8

34.0

12.5

9.9

15.3

12.9

34.0

31.4

12.5

6.0

14.9

9.2

12.4

24.1

13.5

10.1

2.8

30.0

19.0

5.9

9.0

7.7

34.2

15.4

12.0

12.4

45.8

2.8

52.2

11.5

17.3

19.0

19.9

4.6

34.2

36.6

13.0

45.7

10.4

13.2

46.6

19.1

68.7

25.4

27.1

29.0

Change 

during 

April 

1948

-0.4

-

_

_

-2.3

-.4

-1.6

-

-

_

_

-

-

-

_

-

_

_

_

_

_

_

-

_

_

-

-

-

_

-1.2

-

-

_

_

_

+3.2

_

-

_

-

_

_^

-

-

-

-

-

-

_

+3.8

_

-5.6

-
PRECIPITATION

Table 2.--Equivalent depth of water, in inches, determined by snow surveys about

April 1 Continued

Snow course

WHITE SALMON RIVER

BASIN

Cultus Creek

Surprise Lakes

LEWIS RIVER BASIN

Cultus Creek

Plains of Abraham

Surprise Lakes

COWLITZ RIVER BASIN

Cayuse Pass

White River Entrance

WHITE RIVER BASIN

Cayuse Pass

Corral Pass

Fog Basin

White River Entrance

State 

or 

Province

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Wash.

Lat . and Long . 

or 

Sec. Twp. Rge.

35 7N 8E

14 7N 8E

35 7N 8E

35 9N 5E

14 7N 8E

15 16N IDE

4 16N IDE

15 16N IDE

30 18N HE

32 17N HE

4 16N 10E

Elevation 

(feet)

4,000

4,250

4,000

4,700

4,250

5,300

3,550

5,300

6,000

5,600

3,550

Average prior 

to 1948

No. of 

years

3

4

3

4

4

7

7

7

8

9

7

Depth

44.8

47.5

44.8

64.8

47.5

77.2

15.3

77.2

34.6

41.4

15.3

1946

71.2

77.8

71.2

L09.7

77.8

L39.5

33.1

L39.5

53.8

70.1

33.1

1947

_

39.7

_

50.7

39.7

86.8

13.3

86.8

45.0

41.8

13.3

1948

44.8

47.8

44.8

60.2

47.8

94.0

22.9

94.0

52.0

53.7

22.9

Change 

during 

April 

1948

_

-

_

-

-

_

-

»

-

-

-

824933 O - 49 - 4
36 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Daily range of temperature

IDAHO FALLS.IDAHO

I +5 

0

MISSOULA, MONTANA

YAKIMA, WASHINGTON

REVELSTOKE, BRITISH

15 31 15 29 15 31 15 30 15 31 15 S

JANUARY FEBRUARY MARCH APRIL MAY JUNE

Accumulated departure of mean monthly temperature from the normal

Figure 13. Daily range of temperature and accumulated departure of mean monthly 

temperature from normal at various temperature stations of the United States 

Weather Bureau and the Meteorological Service, Dominion of Canada, in Columbia 

River Basin, January 1 to June 30^ 194B.
EXPLANATION OP DATA 37 

Temperature

Temperature was a major factor in producing the flood of May-June 1948. Prior to 

May 15, subnormal temperatures prevailed throughout the basin. After May 15 temperatures 

rose rapidly and in general remained abnormally high. Normal snow melt during April and 

early May was prevented, and rapid melting of the snow was concentrated into a comparatively short period after May 15.

Temperature is discussed in the section "Meteorology," prepared by the staff of the 

United States Weather Bureau, and is discussed briefly as a flood-producing factor in 

other preceding sections of this report.

Figure 13 shows the daily range in temperature and the accumulated departure of 

monthly mean temperature from normal at various stations of the United States Weather 

Bureau and the Meteorological Service, Dominion of Canada, in Columbia River Basin for 

the period January 1 to June 30, 1948.

Preceding sections of the report have compared other features of the floods in 

1894 aad 1948. Figure 14 shows a comparison of daily range in temperature for the period 

April 1 to June 30 in the years 1894 and 1948 at various United States Weather Bureau 

temperature stations in the basin.

DETERMINATION OP FLOOD DISCHARGES

The general methods employed by the Geological Survey in the determinations of 

maximum flood discharges at regular river-measurement stations and at locations where 

regular river-measurement stations are not maintained have been described in detail in 

several water-supply papers relating to floods, and repetition of the description in 

this report is deemed unnecessary.

At the regular river-measurement stations operations consiat principally of the 

determination of a stage-discharge relation, from which, under normal conditions and 

from a known stage, the discharge can be determined. At other places or for stages in 

excess of those defined by the stage-discharge relation, determinations of maximum flow 

have been based chiefly on (1) computation of flow over dams, (2) computation of flow 

from slope-area observations, and (3) computation of flow through contracted openings. 

Examples and general information in regard to the use of these methods with special 

references to the conditions experienced by the Geological Survey in applying them to 

various severe floods are given in Water-Supply Papers 773-E, 796-G, 798, 799, 800, 816, 

843, and 888.

STAGES AND DISCHARGES AT STREAM-GAGING STATIONS 

Explanation of data

One of the foremost purposes of this report is the publication of useful detailed 

information regarding the stages and discharges of streams during the floods of MayJune 1948 that will not be available in the summarized records of river discharge 

published annually in the water-supply papers of the Geological Survey. The Justification for making available such detailed information rests upon the recognized need 

for records of flood behavior that will show not only the mean daily discharge and the 

maximum rates of discharge during a flood as usually published for a gaging station but 

also the stages and rates of discharge at frequent times throughout the flood period.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

31 5 10 15 20 25 30 5 10 15 20 25 31 5 10 15 20 25 30 

APRIL MAY JUNE

1894 1948

Figure 14. Daily range of temperatures at various temperature stations of the United 

States Weather Bureau In Columbia River Basin, April 1 to June 30, 1894 and 1948.
STAGES AMD DISCHARGES AT STREAM-GAGING-STATIONS 39

Such records also will make possible a definition of conditions of stage and discharge 

at all stations in a basin at a given time during the progress of the flood. This 

detail is essential for intensive and comprehensive studies of the eharaeterisities of 

floods and promotes the formulation of appropriate plans for flood protection and 

control. It furnishes basic information for studying the behavior of flood crests, ineluding the incidence of crests from different tributaries of a stream, the progress of 

flood crests throughout a river system, and other features useful in deriving the elements necessary for forecasting flood heights and for appraising the characteristics of 

different basins in the shedding of flood waters. It furnishes basic information for 

the consideration of the feasibility of reservoirs, channel improvement, forest management, soil treatment, flood forecasting, and other measures with.respect to their merits 

for ameliorating damage and losses caused by floods. Moreover, in view of the recordsetting character of the floods of May-June 1948, it is important that full and authentic information concerning them be available for reference and guidance in connection with future urban and industrial development, with highway and bridge construction, and especially with the design of hydraulic structures in their relation to 

flood channels of streams.

Ih general, records of gaging stations published in this report relate to streams 

on which floods occurred or which are situated adjacent to the margins of the flooded 

regions and so serve to define the areal extent of the floods.

The basic data systematically collected at stream-gaging stations consist of records of stage, measurements of discharge, and general information useful in determining the daily flow from the records of gage heights and discharge measurements. The 

records of stage are obtained either by periodic direct readings on a nonreeording gage 

or by a water-stage recorder which provides a continuous graph of stage. Measurements 

of discharge are generally made by a current meter, the methods of use of which are outlined in standard textbooks. Oeeasionally determination of extraordinary peak flows 

must be made by auxiliary methods referred to in the preceding section of this report. 

A typical stream-gaging station is usually equipped with a water-stage recorder-and 

eableway and a suspended car from which discharge measurements are made. Rating tables 

showing the discharges for indicated stages are prepared from the results of discharge 

measurements. At some river stations other or auxiliary devices are used in the determination of discharge, such as artificial controls, turbines, venturi meters, and 

gates, so calibrated as to indicate rates of discharge.

The data presented in the following tables comprise, in general, for each streamgaging station a description of the station, a table showing the daily discharges 

throughout the 3-month period May to July 1948, and a table showing the stage and discharge at the indicated time during the period of major flood flow, generally May 17 

to June 21, which Is sufficiently detailed to permit the delineation of reasonably 

accurate graphs of the instantaneous stage and discharge for the flood period. The 

data are intended to be reasonably complete and explicit with respect to essential information, although they are presented in concise form.

The description of the station gives information concerning the type, location, 

and datum of the gage, the area of the drainage basin, and the record of gage heights. 

The information regarding gage heights describes the method of determining- the stage 

during the flood and is of special technical significance, because the flood conditions
40 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

at some localities prevented the use of the usual method of obtaining records of stage 

and discharge. A statement regarding the stage-discharge relation explains briefly the 

methods used In the definition of the rating curve over the ranges of stage occurring 

In the floods of May-June 1948 as well as of the previous maximum flood of record and 

gives information on conditions that affected the stage-discharge relation. The description also includes Information with respect to other auxiliary methods used In 

obtaining the discharge. The maximum stage and discharge at the gaging station are 

given for the floods of May-June 1948 and for the indicated period of record prior thereto, also at some stations for floods antedating such period of record. Miscellaneous 

notes and comments essential or helpful to an understanding of the record are Included 

as remarks.

The table of mean dally discharge presents the data generally for May, June, and 

July, which cover not only the period of the flood but also a time of sufficient length 

before and after the peak to show the relation of the flood discharges to the prevalent 

discharges of the preceding and following periods, thus giving a general perspective 

of the stream-flow conditions prior to, throughout, and subsequent to the flood rise. 

The table shows the mean monthly discharge for the 3 months and the volume of runoff 

expressed In depth in inches over the drainage area. Figures 15, 16,. and 17 show hydrographs of mean dally discharge at 25 selected stream-gaging stations for this 3-month 

period.

The tables showing stage and discharge at Indicated times are designed to present 

the rise and recession of the flood in detail. In general each table begins on May 17, 

well before the beginning of the major flood rise, and continues through June 21, when 

the flood had largely passed out of the river systems. Standard time Is used. This 

table is accompanied by supplemental records of stage and discharge when necessary to 

afford an adequate record for the given river-measurement station. Hydrographs of discharge showing characteristics of the flood peaks and conditions of stream flow during 

the period May to July are presented for stream-gaging stations on the main stem of the 

Columbia River In figure 18.

The stages at Indicated times were obtained from records of continuous water-stage 

recorders, so far as such records were available. For stations at which the records 

were broken because of some failure In the recording system the method of computing the 

missing periods has been explained In the section of the description concerning gage 

heights or discharge. For stations at which the records of stage consisted of only one 

or more gage readings per day, the stages at Indicated times generally represent such 

readings, unless otherwise explained.

The following tables present, for several reservoirs, records of stage and storage 

content through the flood period In a form similar to the data for the stream-gaging 

stations. These records are of special value In showing the Influence of storage reservoirs on flood flows, In relation both to the appraisal of their effect on flood flows 

and to the extending of Information on the natural characteristics of drainage basins in 

the shedding of flood waters.

The records are presented in the order regularly used by the Geological Survey In 

Its water-supply papers. Records for gaging stations on the main streams are presented 

first, in downstream order, and then stations on tributaries in similar order beginning 

with the uppermost. The table of contents lists the stations In the order In which
EXPLANATION OP DATA

75

50

25

0

100

KOOTENAY RIVER AT WARDNER, 

BRITISH COLUMBIA

I

KOOTENAI RIVER AT 

LEONIA, IDAHO

MOYIE RIVER AT 

EILEEN, IDAHO

z

O 50

O

LJ

cn 25

U.

O o

en 

a

z 

< 

en 100

ID 

O

X

ul 

o 

oc

X 

o 

en

Q 10

CLARK FORK AT 

ST. REGIS, MONTANA

50

50

PEND OREILLE RIVER

BELOW 2 CANYON, NEAR

J/IETALINE FALLS,WASHINGTON

FLATHEAD RIVER AT 

COLUMBIA FALLS, MONTANA

FLATHEAD RIVER NEAR 

POLSON, MONTANA

10 15 20 25 

MAY

10 15 20 25 30 

JUNE

10 15 20 25 31 

JULY

Figure 15. Graphs of mean dally discharge at various river-measurement stations 

In Kootenal and Pend Oreille River Basins, May 1 to July 31, 1948.
FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

MIDDLE FORK FLATHEAD 

RIVER AT ESSEX, MONTANA

COEUR D ALENE RIVER 

NEAR CATALOG,IDAHO

SPOKANE RIVER AT 

SPOKANE, WASHINGTON

ST JOE RIVER AT 

CALDER, IDAHO

OKANOGAN RIVER NEAR 

TONASKET, WASHINGTON

METHOW RIVER AT 

TWISP, WASHINGTON

WENATCHEE RIVER AT 

PESHASTIN, WASHINGTON

YAKIMA RIVER AT 

KIONA, WASHINGTON

10 15 20 25 

MAY

10 15 20 25 30 

JUNE

10 15 20 25 31 

JULY

Figure 16.--Graphs of mean dally discharge at various river-measurement stations In 

upper Columbia River Basin, May 1 to July 31, 1948.
EXPLANATION OP DATA

400

200

SNAKE RIVER, NEAR 

CLARKSTON, WASHINGTON

PAYETTE RIVER NEAR 

PAYETTE,IDAHO

SALMON RIVER AT 

WHITEBIRD, IDAHO

GRANDE RONDE RIVER AT 

RON DOWA, OREGON

CLEARWATER RIVER AT 

SPALDING, IDAHO

UMATILLA RIVER, NEAR 

UMATILLA, OREGON

JOHN DAY RIVER AT 

MCDONALD FERRY, OREGON

DESCHUTES RIVER AT MOODY 

NEAR BIGGS, OREGON

5 10 15 20 25 31 -5 10 15 20 25 30 5 10 15 20 25 31 

MAY JUME JULY

Figure IV. Graphs of mean dally discharge at various river-measurement stations in 

Snake and lower Columbia River Basins, May 1 to July 31, 1948.
SECOND-FEET OF THOUSANDS IN DISCHARGE, 

SdOO-U £0 aKQf-iVW 8*61 NI ViawmoO H3AIH NISVS 
EXPLANATION OP DATA 45

they appear herein; the Index presents them alphabetically by stream and place names.

The maximum discharges at these stream-gaging stations and at other places on these 

streams, with other related Information, are listed In table 3. The stations are Identified on plate 6 (In pocket) by means of the Index numbers shown In the first column of 

the table.

Reference should be made to the water-supply papers of the Geological Survey for 

other available published records of flow of the streams discussed In this report.
46 FLOODS OP MAY-JUKE 1948 IK COLUMBIA RIVER BASIN

Columbia River Main Stem

Columbia River at Nlcholson, British Columbia

Location.- Lat. 116°56'00", long. 510 14'10", at highway bridge about 100 yards west of 

Canadian Pacific Railway tracks, 5 miles south of Oolden. Datum of gage Is 2,563.89 

feet above mean sea level, datum of Geodetic Survey of Canada, adjustment of 1928.

Drainage area.- 2,490 square miles.

gage-height record.- Staff gage read once or twice dally.

Discharge record.- Stage-discharge relation defined by current-meter measurement's. 

Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 19,400 second-feet June 11, 1948 (gage height, 

13.60 feet).

1903-29 (Golden), 1929 to April 1948 (Nlcholson): Discharge, 23,700 second-feet 

June 25, 1916 (gage height, 12.50 feet, at Golden).

Remarks.- Records furnished by Dominion Water and Power Bureau, Department of Mines and 

Resources, Canada.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,330

2,630

2,530

2,430

2,430

2,330

2,280

2,330

2,480

2,530

June

' 14,900

15,500

15,900

16,200

16,600

16,800

17,300

17,900

18,300

19,000

July

13,500

13,300

13,200

13,100

12,600

12,400

11,900

11,500

11,200

10,800

Day

11

12

13

14

15

16

17

18

19

20

May

2,630

2,680

2,850

2,960

3,050

3,060

3,120

3,510

4,100

4,460

June

19,400

19,20C

18,60C

17,90C

16,900

16,40C

15,900

15,600

15,30C

15,000

July

10,300

9,910

9,490

9,160

8,840

8,520

8,280

8,040

7,880

7,880

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .

Runoff, in inches ...................................................... .....................................................................

May

4,980

5,730

6,670

7,640

8,520

9,160

10,000

10,800

11,600

12,600

13,900

5,110

2.36

June

14,800

14,800

14,800

14,900

14,900

14,800

14,600

14,300

14,100

13,800

16,100

7.22

July

7,880

7,800

7,880

8,040

8,200

8,330

8,360

8,280

8,200

8,040

7,850

9,700

4.50

Gage height, in feet, and discharge, in second-feet, at indicated time, 19&8

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

Gage 

height Discharge

May 17

3.55 3,120

May 18

3.90 3,510

May 19

4.40 4,100

May 20

4.70 4,460

May 21

5.10 4,980

May 22

5.65 5,730

May 23

6.30 6,670

May 24

6.95 7,640

May 25

7.50 8,520

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

Gage 

height Discharge

May 26

7.90 9,160

May 27

8.40 10,000

May 28

8.85 10,800

May 29

9.35 11,600

May 30

9.90 12,600

May 31

10.60 13,900

June 1

11.15 14,900

June 2

11.50 15,500

June 3

11.70 15,900

Hour

8

K

1

8a

8a

8a

8a

8a

8a

' 8a

8a

Gage 

height Discharge

June 4

11.90

11.85

11.87

Jun

12.10

Jun

12.25

Jun

12.50

Jun

12.80

Jun

13.05

Jun

13.40

Jun

13.60

Jun

13.50

16,200

16,100

16,200

e 5

16,600

e 6

16,800

e 7

17,300

e 8

17,900

e 9

18,300

e 10

19,000

e 11

19,400

e 12

19,200

Hour

8a

' 8a

8a

8a

8a

8a

8a

8a

4:30

8a

4:30

Gage 

height Discharge

June 13

13.20 18,600

June 14

12.80 17,900

June 15

12.30 16,900

June 16

12.00 16,400

June 17

11.70 15,900

June 18

11.55 15,600

June 19

11.40 15,300

June 20

11.25

11.20

15,000

15,000

June 21

11.10

11.10

14,800

14,800
COLUMBIA RIVER MAIN STEM 47

Columbia River at Revelstoke, British Columbia

Location.- Lat. 500 58'24", long. 118°13'24", at highway bridge about 70 yards downstream 

from Canadian Pacific Railway bridge, 1 mile west of Revelstoke. Datum of gage is 

1,422.94 feet above mean Sea level, datum of Geodetic Survey of Canada, adjustment of 

1928.

Drainage area.- 9,000 square miles.

gage-height record.- Wire-weight gage read once or twice daily.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths.

Maxima>- May-June 1948: Discharge, 178,000 second-feet June 9 (gage height, 22.49

1911-22, 1928 to April 1948: Discharge, 171,000 second-feet July 18, 1920 (gage 

height, 21.1 feet).

Flood of 1894 reached a stage of 23.55 feet (discharge, 215,000 second-feet). 

Remarks.- Records furnished by Dominion Water and Power Bureau, Department of Mines and 

Resources, Canada.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

13,800

19,200

20,400

20,300

19,800

19,800

20,700

21,000

23,500

26,100

June

125,000

130,000

115,000

118,000

117,000

132,000

136,000

161,000

178,000

170,000

July

82,400

80,200

69,100

58,200

56,700

59,300

61,400

57,900

55,700

54,700

Day

It

12

13

14

15

16

17

18

19

30

May

29,800

32,600

35,200

38,200

35,400

34,600

37,300

44,200

44,800

49,000

June

140,000

120,000

113,000

109,000

112,000

115,000

114,000

107,000

103,000

103,000

July

53,500

51,000

49,200

47,800

51,600

54,500

55,700

58,900

60,800

62,100

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

60,600

78,400

90,100

108,000

112,000

117,000

123,000

138,000

148,000

144,000

133,000

59,300

7.60

June

105,000

106,000

108,000

94,300

87,200

85, 300

82,900

80,300

79,200

84,100

114,000

14.14

July*

63,700

63,400

62,600

62,200

61,600

61,200

60,400

60,100

60,100

60,500

60,900

59,900

7.68

Gage height, in feel, and discharge, in second-feet, at indicated time, 1948

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

8a

hei^t | Discharge

May 17

10.54 37,300

May 18

11.53 44,200

May 19

11.60 44,800

May 20

12.17 49,000

May 21

13.57 60,600

May 22

15.35 78,400

May 23

16.36 90,100

May 24

17.79 108,000

May 25

18.13 112,000

May 26

18.44 117,000

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

8a

£& i 05**"*6

May 27

18.88 123,000

May 28

20.00 138,000

May 29

20.66 148,000

May 30

20.37 144,000

May 31

19.63 133,000

June 1

19.03 125,000

June 2

18.66 120,000

June 3

18.33 115,000

June 4

18.52 118,000

June 5

18.45 117,000

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

ufft D**"*8

June 6

19.58 132,000

June 7

19.84 136,000

June 8

21.46 161,000

June 9

22.49 178,000

June 10

22.00 170,000

June 11

20.08 140,000

June 12

18.68 120,000

June 13

18.16 113,000

June 14

17.86 109,000

Hour

8

4:30

8

4:30

8

4:30

8

4:30

8

4:30

8

4:30

8

4:30

A Discha^

June 15

18.02 111,000

18.11 112,000

June 16

18.37 116,000

18.26 114,000

June 17

18.27 114,000

18.23 114,000

June 18

17.72 107,000

17.75 108,000

June 19

17.43 103,000

17.38 103,000

June 20

17.35 102,000

17.42 103,000

June 21

17.57 105,000

17.61 106,000
48 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Columbia River at Blrchbank, British Columbia 

(international gaging station)

Location.- Lat. 49°11', long. 117°42', at Blrchbank, British Columbia, 7 miles upstream 

from Trail, 11 miles downstream from Kootenal River, and 17 miles upstream from 

international boundary. Datum of gage Is 1,329.909 feet above mean sea level, datum 

of Geodetic Survey of Canada, adjustment of 1947.

Drainage area.- 34,000 square miles.

Gage-height record.- Water-stage recorder graph except period July 7-31, when gage 

heights at Trail were used.

Discharge record.- Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 370,000 second-feet 4 p.m. June 11 (gage height,

 50T52 feet; gage height, 46.17 feet, at Trail).

1913 to April 1948: Discharge, 312,000 second-feet June 14, 15, 1913-(gage 

height, 41.6 feet, at Trail).

Remarks.- Small diversions above station for Irrigation. Plow affected by partial regulatlon of Kootenal River In Kootenay Lake. This station is one of the International 

gaging stations maintained by Canada under agreement with the United States.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

57,000

58,900

60,300

62,500

64,000

65,200

67,000

68,600

70,300

72,200

June

303,000

310,000

317,000

323,000

328,000

334,000

339,000

347,000

355,000

365,000

July

238,000

231,000

224,000

215,000

206,000

198,000

169,000

180,000

175,000

169,000

Day

11

12

18

14

15

16

17

18

19

20

May

74,500

77,000

80,500

83,700

86,000

89,000

93,100

97,500

102,000

109,000

June

369,000

369,000

363,000

356,000

349,000

343,000

338,000

331,000

324,000

317,000

July

162,000

157,000

152,000

148,000

143,000

140,000

137,000

134,000

133,000

126,000

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

120,000

131,000

146,000

164,000

185,000

205,000

227,000

249,000

268,000

282,000

294,000

i 99 onn

4.17

June

310,000

303,000

297,000

289,000

283,000

275,000

266,000

258,000

250,000

244,000

10.45

July

124,000

124,000

123,000

124,000

123,000

123,000

122,000

122,000

120,000

117,000

116.000

i *\A. *7nn

5.24

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

h. 

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

g&l Discharge

May 17

20.52 

20.61 

20.67 

20.78 

20.96 

21.07

92,100 

92,700 

92,700 

93,700 

94,800 

95,400

May 23

27.48 

27.86 

28.14 

28.57 

28.92 

29.37

Mi

40.60 

40.88 

41.12 

41.35 

41.55 

41.82

Ju

46.23 

46.32 

46.38 

46.46 

46.60 

46.65

140,000 

143,000 

145,000 

149,000 

152,000 

155,000

»y29

263,000 

266,000 

267,000 

271,000 

273,000 

276,000

ne4

322,000 

323,000 

323,000 

324,000 

326,000 

526,000

June 10

49.82 

50.03 

50.21 

50.35 

50.48 

50.51

Ju

48.30 

48.20 

48.14 

48.10 

48.11 

47.96

361,000 

363,000 

565,000 

367,000 

368,000 

569,000

nel6

344,000 

345,000 

545,000 

542,000 

342,000 

341,000

Gage 

height Discharge

May 18

21.17 

21.26 

21.50 

21.51 

21.62 

21.78

96,100 

96,700 

98,100 

98,200 

98,800 

99,800

May 24

29.74 

30.10 

30.40 

30.76 

31.10 

51.50

Mi

42.06 

42.27 

42.48 

42.70 

42.85 

43.10

Ju

46.75 

46.81 

46.86 

46.87 

47.00 

47.13

Ju

50.56 

50.58 

50.57 

50.62 

50.61 

50-. 60

158,000 

162,000 

164,000 

167,000 

170,000 

174,000

iy30

278,000 

280,000 

282,000 

285,000 

286,000 

289,000

ne5

327,000 

328,000 

528,000 

528,000 

530,000 

331,000

nell

369,000 

369,000 

369,000 

370,000 

570,000 

570,000

June 17

47.82 

47.72 

47.67 

47.56 

47.45 

47.40

539,000 

338,000 

537,000 

356,000 

335,000 

354,000

g&l Discharge

May 19

21.86 

21.95 

22.15 

22.25 

22.60 

22.68

100,000 

101,000 

102,000 

103,000 

105,000 

106,000

May 25

31.90 

32.31 

32.67 

33.08 

33.46 

35.89

Mi

43.31 

43.46 

43.65 

43.82 

43.90 

44.02

Ju

47.20 

47.27 

47.30 

47.35 

47.48 

47.61

178,000 

181,000 

185,000 

188,000 

192,000 

196,000

»y31

291,000 

293,000 

295,000 

297,000 

297,000 

299,000

ne6

552,000 

533,000 

553,000 

354,000 

335,000 

337,000

June 12

50.59 

50.56 

50.51 

50.42 

50.36 

[50.28

369,000 

569,000 

569,000 

368,000 

367,000 

366,000

June 18

47.28 

47.15 

46.98 

46.98 

46.85 

46.74

555,000 

552,000 

330,000 

350,000 

328,000 

327,000

Gage 

height Discharge

May 20

22.77 

22.98 

23.22 

23.41 

23.65 

24.07

106,000 

107,000 

109,000 

110,000 

112,000 

115,000

May 26

34.30 

34.65 

54.96 

35.14 

35.52 

35.96

Ju

44.20 

44.36 

44.41 

44.56 

44.71 

44.82

Jt

47.70 

47.75 

47.81 

47.90 

48.02 

48.13

Ju

50.19 

50.08 

49.99 

49.95 

49.81 

49.74

200,000 

204,000 

207,000 

208,000 

212,000 

217,000

ne 1

301,000 

302,000 

303,000 

304,000 

306,000 

307,000

ne7

338,000 

358,000 

339,000 

540,000 

341,000 

342,000

ne!3

365,000 

564,000 

363,000 

362,000 

361,000 

360,000

June 19

46.62 

46.54 

46.35 

46.28 

46.20 

46.00

326,000 

525,000 

523,000 

322,000 

322,000 

320,000

Gage 

height

Mi

24.23 

24.40 

24.75 

24.84 

25.18 

25.49

Discharge

iy 21

116,000 

117,000 

120,000 

120,000 

123,000 

125,000

May 27

36.36 

36.70 

37.00 

37.36 

37.71 

38.21

Ju

44.97 

45.05 

45.11 

45.30 

45.46 

45.55

Ju

48.24 

48.36 

48.50 

48.63 

48.79 

48.90

Ju

49.60 

49.47 

49.34 

49.26 

49.17 

49.01

Jui

45.89 

45.88 

45.74 

45.62 

45.51 

45.40

221,000 

224,000 

227,000 

231,000 

234,000 

239,000

ne2

309,000 

310,000 

310,000 

312,000 

314,000 

315,000

ne8

344,000 

345,000 

346,000 

348,000 

349,000 

351,000

ne!4

359,000 

357,000 

356,000 

355,000 

354,000 

352,000

lie 20

318,000 

318,000 

317,000 

316,000 

315,000 

313,000

i2Bl" -

May 22

25.79 

26.03 

26.34 

26.64 

26.73* 

27.16

127,000 

129,000 

132,000 

134,000 

135,000 

138,000

May 28

38.55 

38. 9O 

S3. 23 

3^.60 

39.89 

40,25

Ju

45.64 

45. 7& 

45.80 

4S.87 

46.00 

46.12

242,000 

246,000 

249,000 

253,000 

256,000 

259,000

ne3

316,000 

317,000 

317,000 

318,000 

320,000 

321,000

June 9

49.00 

49.09 

49.23 

49.34 

49.40 

49.50

Ju

48.90 

48.75 

48.67 

48.72 

48.52 

48,39

352,000 

353,000 

355,000 

356,000 

356,000 

358,000

ne!5

351,000 

349,000 

348,000 

349,000 

347,000 

345,000

June 21

45.30 

45.21 

45.09 

44.37 

44.86 

44.75

312,000 

311,000 

310,000 

309,000 

308,000 

306,000
COLOMBIA RIVER MAIN STEM 49

Columbia River at International boundary 

(International gaging station)

Location.- Lat. 49°00'03", long. 117°37'40", In SE-fc sec. 4, T. 40 N., R. 41 E., at 

International boundary, half a mile downstream from Pend Orellle River. Auxiliary 

water-stage recorder 2.2 miles downstream. Datum of gage is at mean sea level 

(Bureau of Reclamation 1937 datum).

Drainage area.- 59,700 square miles.

gage-height record.- Water-stage recorder graphs from base and auxiliary gages.

Discharge racord.- Computed by normal-fall method. Stage-fall-discharge relations 

defined by current-meter measurements. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 550,100 second-feet 6 a.m. June 12 (elevation, 

T7358.13 feet).

1938 to April 1948: Discharge, 360,200 second-feet June 6, 1946 (elevation, 

1,326.08 feet).

Remarks.- Small diversions above station for irrigation. Plow affected by regulation 

In Kootenai and Pend Oreille River Basins. This station Is one of the international 

gaging-stations maintained by the United States under agreement with Canada. Records 

provisional, subject to revision.

Day

1

2

3

4

5

6

7

8

9

10

May

106; 600

108,700

111,200

116,100

118,300

120,500

125,100

127,800

131,100

134,800

June

459,100

470,100

481,400

488,800

494,300

499,200

506,700

516,600

527,400

541,900

July

348,300

336,900

321,300

306,700

291,200

276,200

263,100

250,800

238,600

229,400

Day

11

12

13

14

15

16

17

18

19

20

May

138,500

142,400

149,700

154,100

157,600

162,800

169,700

175,800

182,600

194,700

June

548,600

548,500

542,400

533,400

525,200

516,900

509,600

499,300

489,600

477,900

July

221,000

211,700

203,600

196,000

190,300

186,300

181,700

177,300

172,000

165,800

Day

21

22

23

24

25

26

27

28

29

30

81

Monthly mean discharge, in second-feet...... ....................................... .. ........... ... _ .....

Runoff, in inches ....._...... .............................................................................................................

May

209,000

222,800

241,100

264,700

290,000

318,900

353,200

386,500

409,300

426,400

443,900

3.98

June

466,700

435,200

445,600

434,000

422,200

409,100

395,600

383,900

371,600

360,300

8.92

July

162,400

160,100

158,700

158,000

157,900

156,800

155,600

153,800

150,700

147,500

145,800

4.03

Elevation*, in feet, and discharge, in second-feet, at Indicated time, 1948

i

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

.3EJ" -

May 17

11.23 

11.34 

11.43 

11. 43 

11.66 

11.70

Ml

16.93 

3,7.25 

17.52 

17.89 

18.20 

18.43

Mi

28". ei

29.07 

29.26 

29.35 

29.50 

29.75

J«

34.20 

34.25 

34.33 

34.34 

34.40 

34.50

167,700 

168,700 

169,700 

170,400 

172,200 

172,600

iy23

233,000 

237,000 

240,800 

245,500 

Z49.400 

252,400

iy29

403,600 

407,400 

410,300 

411,500 

414,300 

417,900

me 4

487,200 

488,000 

489,300 

489,400 

.490,400 

492,000

June 10

37.20 

37.54 

37.69 

37.84 

37.94 

37.98

Ju

36.22 

36.13 

36.06 

36.04 

35.95 

35.90

535,200 

540,600 

543,000 

545,400 

547,000 

547,700

ne 16

519,000 

517,600 

516,500 

516,100 

514,700 

513,900

Elevation Discharge

May 18

11.83 

11.90 

12.00 

12.07 

12.12 

12.25

174,200 

175,000 

176,000 

176,800 

177,300 

178,600

May 24

18.79 

19.25 

19.51 

19.79 

20.05 

20.36

M

29.90 

30.12 

30.31 

30.45 

30.69 

30.85

Ju

34.57 

34.60 

34.66 

34.66 

34.72 

34.78

Ju

38.00 

38.03 

38.05 

38.02 

38.08 

38.07

255,900 

261,700 

265,000 

268,700 

272,500 

276,700

iy30

420,200 

423,500 

426,700 

428,900 

432,500 

434,900

ne5

493,100 

493,600 

494,600 

494,600 

495,500 

496,500

nell

548,000 

548,500 

548,800 

548,300 

549,300 

549,100

June 17

35.81 

35.77 

35.64 

35.45 

35.44 

35.36

513,000 

512,300 

509,700 

506,700 

506,500 

505,300

Supplemental record.- June ]

rS£J " * * 

May 19

12.36 

12.45 

12.54 

12.67 

12.87 

13.10

180,100 

181,100 

182,000 

183,500 

185,600 

188,100

May 25

20.73 

21.00 

21.34 

21.68 

21.98 

22.42

281,200 

284,900 

289,900 

294,500 

298,600 

304,600

May 31

31.10 

31.33 

31.50 

31.68 

31.73 

31.94

Ji

34.86 

34.90 

34.96 

34.95 

35.03 

35.18

Ju

38.11 

38.10 

38.05 

38.02 

37.93 

37.89

438,200 

442,100 

444,600 

447,300 

448,100 

451,200

ne6

497,800 

498,400 

499,400 

499,200 

500,500 

502,900

ne!2

549,800 

549,600 

548,800 

548,300 

546,900 

546,200

June 18

35.31 

35.20 

35.00 

34.90 

34.78 

34.73

504,000 

501,700 

498,500 

496,900 

495,000 

494,200

2, 6 a.m. , 1,;

*S£J « *«« 

May 20

13.29 

13.45 

13.70 

13.81 

14.05 

14.38

M<

22.83 

23.16 

23.42 

23.74 

24.02 

24.47

J«

32.14 

32.33 

32.48 

32.60 

32.67 

32.82

Ji

35.28 

35.36 

35.42 

35.42 

35.57 

35.72

190,500 

192,300 

194,900 

196,100 

198,900 

202,700

iy26

310,200 

315,000 

318,700 

323,400 

327,200 

333,700

me 1

454,600 

457,500 

459,700 

461,500 

463,000 

465,300

ne7

504,500 

505,800 

506,700 

506,700 

509,100 

511,500

June 13

37.82 

37.72 

37.67 

37.62 

37.45 

37.35

545,100 

543,500 

542,700 

541,900 

539,200 

537,600

June 19

34.60 

34.50 

34.40 

34.26 

34.11 

34.03

493,600 

492,000 

489,900 

487,700 

485,300 

484,000

 t?onl Dtach'u*e

May 21

14.60 

14.77 

14.97 

15.03 

15.25 

15.47

205,200 

207,200 

209,500 

210,300 

212,900 

215,400

May 27

25.06 

25.36 

25.66 

25.97 

26.30 

26.74

Ju

32.99 

33.05 

33.15 

33.24 

33.34 

33.54

Ju

35.85 

35.94 

36.06 

36.10 

36.21 

36.40

Ju

37.25 

37.20 

37.10 

37.00 

36.90 

36.80

344,400 

348,800 

353,200 

357,900 

363,100 

370,000

ne2

467,300 

468,300 

469,900 

471,300 

472,900 

476,100

ne8

513,600 

515,000 

517,000 

517,600 

519,400 

522,400

ne 14

536,000 

535,200 

533,600 

532,000 

530,400 

528,800

June 20

33.87 

33.84 

33.69 

33.56 

33.43 

33.29

481,400 

480,900 

478,000 

476,000 

473,500 

471,200

Vat?o'J Di8ch"*e

May 22

15.69 

15.88 

16.09 

16.32 

16.43 

16.68

218,300 

220,500 

223,000 

225,600 

227,000 

229,900

May 28

27.15 

27.55 

27.80 

28.03 

28.30 

28.58

Ju

33.71 

33^79 

33.86 

33.88 

33.97 

34.10

Ju

36.52 

36.61 

36.71 

36.81 

36.91 

37.01

377,200 

383,500 

387,300 

391,000 

395,100 

399,400

ne3

479,400 

480,600 

481,800 

482,100 

483,500 

485,600

ne9

524,300 

525,800 

527,400 

529,000 

530,600 

532,200

June 15

36.75 

36.68 

36.56 

36.50 

36.40 

36.33

528,000 

526,900 

525,000 

524,000 

522,400 

521,300

June 21

33.21 

33.13 

33.03 

32.89 

32.76 

32.66

470,500 

468,700 

467,100 

465,000 

463,000 

461,000

38.13 ft., 550,100 sec. -ft.

* Add 1,300.00 feet to obtain elevation above mean sea level.
50 FLOODS OP MAY-JUKE 1948 IN COLOMBIA RIVER BASIN

Franklin D. Roosevelt Lake at Grand Coulee Dam, Wash.

Location.- Lat. 47"57'20", long. 118°59'10 n , In lot 3, sec. 1, T. 28 N., R. 30 E.,

In block 12 of Grand Coulee Dam at Grand Coulee. Datum of gage Is at mean sea

level (levels by Bureau of Reclamation). 

Drainage area.- 74,100 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Remarks.- Reservoir formed by concrete dam;, capacity, 5,118,000 acre-feet between

elevations 1,208 feet (lower limit of operation) and 1,288 feet (top of gates).

Dead storage, 4,371,000 acre-feet. Figures given herein represent total contents.

Gage-height record and reservoir areas furnished by Bureau of Reclamation.

Elevation, in feet, and contents, in acre-feet, at 12 p.m. of indicated day

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change in

contents,

acre-feet

May

Elevation

1,288.9

1,288.9

1,288.7

1,289.0

1,289.1

1,289.2

1,289.6

1,290.0

1,290.0

1,290.0

1,289.9

1,290.0

1,289.7

1,289.7

1,289.9

1,289.8

1,289.8

1,290.0

1,289.9

1,289.9

1,290.0

1,290.0

1,290.0

1,290.0

1,290.1

1,290.0

1,289.8

1,290.0

1,290.0

1,290.0

1,289.9

Acre-feet

9,563,700

9,563,700

9,547,100

9,572,000

9,580,300

9,588,600

9,621,800

9,655,000

9,655,000

9,655,000

9,646,700

9,655,000

9,630,100

9,630,100

9,646,700

9,638,400

9,638,400

9,655,000

9,646,700

9,646,700

9,655,000

9,655,000

9,655,000

9,655,000

9,663,300

9,655,000

9,638,400

9,655,000

9,655,000

9,655,000

9,646,700

+99,600

June

Elevation

1,290.0

1,290.0

1,289.9

1,290.0

1,290.0

1,289.9

1,290.0

1,290.0

1,290.0

1,290.1

1,290.1

1,290.0

1,289.9

1,289.9

1,290.0

1,290.1

1,290.1

1,290.0

1,290.0

1,289.9

1,289.9

1,290.0

1,290.0

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

Acre-feet

9,655,000

9,655,000

9,646,700

9,655,000

9,655,000

9,646,700

9,655,000

9,655 000

9,655,000

9,663,300

9,663,300

9,655,000

9,646,700

9,646,700

9,655,000

9,663,300

9,663,300

9,655,000

9,655,000

9,646,700

9,646,700

9,655,000

9,655,000

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

0

July

Elevation

1,289.9

1,290.0

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,290.0

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,289.9

1,290.0

1,289.9

1,290.0

1,289.9

1,290.0

1,289.9

1,290.0

1,289.9

1,289.8

1,289.8

1,289.9

Acre-feet

9,646,700

9,655,000

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,655,000

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,646,700

9,655,000

9,646,700

9,655,000

9,646,700

9,655,000

9,646,700

9,655,000

9,646,700

9,638,400

9,638,400

9,646,700

0
COLOMBIA RIVER MAIN STEM 51

Columbia River at Grand Coulee Dam, Wash.

Location.- Lat. 47°58'00", long. 118°58'45", opposite lot 4, sec. 36, T. 29 N., R. 30 

E., in pier 3 of highway bridge at Grand Coulee, 2,500 feet downstream from Grand 

Coulee Dam and 14 miles upstream from Nespelem River. Datum of the gage is at mean 

sea-level, datum of 1929.

Drainage area.- 74,100 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage 

heights used to hundredths.

Maxima.- May-June 1948: Discharge, 637,800 second-feet 6 a.m. June 12 (gage height,

 57750 feet).

1913 to April 1948: Discharge, 492,000 second-feet June 15, 1913 (computed on 

basis of records of peak discharge at other gaging stations).

Discharge known, 725,000 second-feet (estimated) during flood of June 1894.

Remarks.- Plow regulated by Franklin D. Roosevelt Lake (see preceding page) and reservoirs in Kootenai, Pend Oreille, and Spokane River Basins.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

153,600

156,800

158,000

151,400

152,100

152,600

158,200

173,100

189,000

185,600

June

535,500

546,000

559,900

566,500

572,700

574,800

573,200

585,300

598,200

617,100

July

357,900

346,600

338,000

313,900

309,100

287,100

277,800

264,500

256,200

246,600

Day

11

12

13

14

15

16

17

18

19

20

May

193, '000

189,200

224,300

213,600

216,800

221,600

223,300

228,500

244,400

254,400

June

621,500

629,700

614,700

590,300

574,600

566,600

555,700

557,500

533,800

519,900

July

235,700

225,900

218,200

211,800

203,300

198,300

192,300

184,000

178,000

177,800

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ......... .................................................. ... .............

Runoff, in inches ............................................................................................................................

May

272,000

304,400

319,600

351,900

379,100

407,700

439,200

453,600

493,700

512,300

529,000

267,800

4.17

June

495,100

482,900

468,200

465,800

441,200

431,800

416,300

399,800

388,200

374,300

528,600

7.96

July

172,300

172,600

165,900

172,600

164,700

169,300

161,900

171,400

163,500

159,000

158,000

221,100

3.44

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

61.73 

61.70 

61.55 

61.25 

61.74 

51.50

225,000 

224,700 

223,000 

219,800 

225,100 

222,500

May 23

68.50 

69.10 

69.85 

70.05 

70.20 

70.35

306,500 

314,300 

324,000 

326,600 

328,600 

330,600

May 29

79.65 

80.30 

80.98 

81.78 

82.26 

82.08

Jl

84.63 

84.68 

84.51 

84.51 

84.51 

84.61

471,000 

482,400 

494,600 

509,800 

519,200 

515,600

ne4

567,200 

568,300 

564,700 

564,700 

564,700 

566,800

June 10

87.14 

86.80 

87.02 

86.70 

87.14 

87.20

621,100 

613,600 

618,400 

611,400 

621,100 

622,400

June 16

85.74 

85.76 

84.26 

83.10 

83.94 

83.94

590,500 

591,000 

559,500 

536,000 

552,800 

552,800

Gage 

height Discharge

May 18

61.52 

61.80 

62.04 

61.88 

62.70 

62.70

222,700 

225,800 

228,400 

226,700 

235,700 

235,700

May 24

71.05 

71.70 

71.76 

72.40 

72.85 

72.99

M

82.00 

81.74 

81.54 

81.78 

82.08 

82.50

Ju

84.62 

84.65 

84.81 

85.10 

85.23 

85.26

339,700 

348,800 

349,600 

358,600 

364,900 

366,900

»y30

514,000 

509,100 

505,300 

509,800 

515,600 

524,000

ne5

567,000 

567,600 

571,000 

577,100 

579,800 

580,500

June 11

87.48 

87.15 

86.80 

86.90 

87.45 

87.38

628,600 

621,300 

613,600 

615,800 

617 , 900 

626,400

June 17

84.30 

84.50 

84.23 

83.65 

83.60 

83.70

560,300 

564,500 

558,800 

547,000 

546,00? 

548,000

Gage 

height Discharge

May 19

63.23 

63.35 

63.60 

63.35 

63.70 

63.88

241,500 

242,800 

245,600 

242,800 

246,700 

248,700

May 25

73.27 

73.60 

73.76 

74.10 

74.60 

75.00

Me

82.60 

82.60 

82.68 

82.74 

82.88 

83.20

Ju

85.16 

85.28 

85.23 

84.70 

84.70 

84.62

370,800 

375,400 

377,600 

382,500 

390,000 

396,000

iy31

526,000 

526,000 

527,600 

528,800 

531,600 

538,000

ne6

578,400 

580,900 

579,800 

568,700 

568,700 

567,000

June 12

87.78 

87.67 

87.36 

87.30 

87.40 

87.61

635,200 

632,700 

625,900 

624,600 

626,800 

631,400

June 18 """

84.00 

84.30 

84.15 

83.60 

84.55 

84.66

554,000 

560,300 

557,200 

546,000 

565,600 

567,900

Gage 

height Discharge

May 20

63.85 

64.05 

64.20 

64.20 

65.30 

65.15

248,400 

250,600 

252,400 

252,400 

265,600 

263,800

May 26

75.70 

75.68 

75.60 

75.75 

76.05 

76.30

Ju

83.08 

83.03 

83.00 

82.90 

83.10 

83.48

Ju

84.98 

85.14 

85.00 

84.70 

84.71 

84.92

406,500 

406,200 

405,000 

407,200 

411,800 

415,800

ne 1

535,600 

534,600 

534,000 

532,000 

536,000 

543,600

ne 7

574,600 

577,900 

575,000 

568,700 

568,900 

573,300

June 13

86.85 

87.10 

87.00 

86.48 

86.60 

86.28

614,700 

620,200 

618,000 

606,600 

609,200 

602,200

June 19

83.53 

83.53 

82.95 

82.10 

82.26 

82.30

544,600 

544,600 

533,000 

516,000 

519,200 

520,000

£&! Discharge

May 21

65.60 

65.88 

65.80 

66.40 

65.82 

65.95

269,200 

272,600 

271,600 

279,200 

271,800 

273,400

May 27

76.00 

78.25 

78.05 

77.70 

78.60 

78.27

Ju

83.60 

83.64 

83.54 

83.48 

83.54 

83.86

411,000 

447,200 

443,800 

438,200 

453,200 

447 , 600

ne2

546,000 

546,800 

544,800 

543,600 

544,800 

551,200

June 8

85.50 

85.54 

85.20 

84.80 

85.80 

86.55

Ju

86.08 

86.00 

85.65 

35.40 

85.33 

85.35

585,500 

586,300 

579,200 

570,800 

591,800 

608,100

ne 14

597,800 

596,000 

588,600 

583,400 

581,900 

582,400

June 20

82.40 

82.40 

82.45 

82.00 

82.20 

82.00

522,000 

522,000 

523,000 

514,000 

518,000 

514,000

Gage 

height Discharge

May 22

67.15 

68.00 

69.40 

69.26 

68.75 

68.26

289,000 

300,000 

318,200 

316,400 

209,800 

303,400

May 28

79.10 

78.33 

78.10 

78.55 

78.80 7 a. 05

461,700 

448,600 

444,700 

452,400 

456,600 

460,800

June 3

83.90 

84.19 

84.39 

84.34 

84.49 

34.69

Ju

86.75 

86.26 

85.37 

85.24 

86.19 

86.94

552,000 

558,000 

562,200 

561,100 

564,300 

568,500

ne9

612,500 

601,700 

582,800 

580,000 

600,200 

616,700

June 15

86.00 

86.40 

85.02 

83.12 

83.85 

84.94

596,000 

604,800 

575,400 

536,400 

551,000 

573,700

June 21

81.00 

81.20 

81.35 

81.25 

80.20 

80.35

495,000 

498,800 

501,600 

499,800 

480,600 

483,300

824933 O - 49 - 5
52 FLOODS OF MAY-JUN3 1948 IN COLUMBIA RIVER BASIN

Columbia River at Grand Coulee Dam, Wash. Continued

Supplemental record:

 May 17, 5 a.m., 61.73 ft., 225,000 sec.-ft.; 6 a.m., 61.40 ft., 221,400 sec.-ft.j

1 p.m., 61.61 ft., 223,700 sec.-ft.; 6 p.m., 61.75 ft., 225,200 sec.-ft.;

7 p.m., 61.45 ft., 222,000 sec.-ft.; 10 p.m., 61.32 ft., 220,500 sec.-ft.

18. 6 a.m., 61.73 ft., 225,000 sec.-ft.; 7 a.m., 61.55 ft., 223,000 sec.-ft.; 

10 a.m., 62.08 ft., 228,900 sec.-ft.; 2 p.m., 62.10 ft., 229,100 sec.-ft.; 

5 p.m., 62.65 ft., 235,200 sec.-ft.; 6 p.m., 62.25 ft., 230,800 sec.-ft.

19. 6 a.m., 63.60 ft., 245,600 sec.-ft; 7 a.m., 63.30 ft., 242,300 sec.-ft.; 

10 a.m., 64.00 ft., 250,000 sec.-ft.; 6 p.m., 63.80 ft., 247,800 sec.-ft.; 

7 p.m., 63.50 ft., 244,500 sec.-ft.

20. 10 a.m., 64.45 ft., 255,400 sec.-ft.; 2 p.m., 64.05 ft., 250,600 sec.-ft.

21. 10 a.m., 66.10 ft., 275,300 sec.-ft.; 3 p.m., 65.80 ft., 271,600 sec.-ft.;

5 p.m., 66.65 ft., 282,400 sec.-ft.; 6 p.m., 65.85 ft., 272,200 sec.-ft.

22. 10 a.m., 69.20 ft., 315,600 sec.-ft.; 1 p.m., 69.55 ft., 320,200 sec.-ft.;

6 p.m., 69.20 ft., 315,600 sec.-ft.; 7 p.m., 68.65 ft., 308,400 sec.-ft.

23. 5 a.m., 68.80 ft., 310,400 sec.-ft.; 6 a.m., 68.50 ft., 306,500 sec.-ft.;

10 a.m., 69.75 ft., 322,800 sec.-ft.

24. 10 p_m., 73.05 ft., 367,700 sec.-ft.

25. 6 a.m., 73.02 ft., 387,300 sec.-ft.

26. 6 p.m., 76.05 ft., 411,800 sec.-ft.; 9 p.m., 76.40 ft., 417,400 sec.-ft.;

11 p.m., 75.40 ft., 417,400 sec.-ft.

27. 2 a.m., 75.95 ft., 410,200 sec.-ft.; 7 a.m., 78.65 ft., 454,000 sec.-ft.; 

2 p.m., 78.10 ft., 444,700 sec.-ft.; 6 p.m., 78.60 ft., 453,200 sec.-ft.; 

7 p.m., 78.15 ft., 445,600 sec.-ft.

28. 6 a.m., 79.10 ft., 461,700 sec.-ft.

29. 2 p.m., 81.08 ft., 496,500 sec.-ft.

31, 2 p.m., 82.32 ft., 530,400 sec.-ft.; 10 p.m., 83.22 ft., 538,400 sec.-ft. 

June 2, 10 a.m., 83.82 ft., 550,400 sec.-ft.

3. 3 p.m., 84.64 ft., 567,400 sec.-ft.; 6 p.m., 84.29 ft., 560,100 sec.-ft.

4. 10 p.m., 84.71 ft., 568,900 sec.-ft.

6. 6 a.m., 85.14 ft., 577,900 sec.-ft.; 2 p.m., 85.23 ft., 579,800 sec.-ft.; 

7 p.m., 84.53 ft., 565,100 sec.-ft.; 10 p.m., 84.50 ft., 564,500 sec.-ft.

7. 10 a.m., 85.24 ft., 580,000 sec.-ft.; 2 p.m., 85.06 ft., 576,300 sec.-ft.

8. 10 a.m., 85.58 ft., 587,200 sec.-ft.; 2 p.m., 85.20 ft., 579,200 sec.-ft.; 

6 p.m., 85.66 ft., 588,900 sec.-ft.; 10 p.m., 86.42 ft., 605,200 sec.-ft.

9. 5 p.m., 85.22 ft., 579,600 sec.-ft.; 10 p.m., 86.76 ft., 612,700 sec.-ft.

10. 11 p.m., 86.97 ft., 617,300 sec.-ft.

11. 2 a.m., 87.70 ft., 633,400 sec.-ft.; 1 p.m., 87.10 ft., 620,200 sec.-ft.; 

6 p.m., 86.93 ft., 616,500 sec.-ft.; 9 p.m., 87.13 ft., 620,900 sec.-ft.

12. 2 a.m., 87.76 ft., 634,700 sec.-ft.; 6 a.m., 87.90 ft., 637,800 sec.-ft.

13. 9 p.m., 86.74 ft., 612,300 sec.-ft.

14. 10 a.m., 86.00 ft., 596,000 sec.-ft.

15. 2 a.m., 85.80 ft., 591,800 sec.-ft.; 6 a.m., 86.60 ft., 609,200 sec.-ft.

16. 2 a.m., 85.60 ft., 587,600 sec.-ft.; 9 a.m., 85.77 ft., 591,200 sec.-ft.

17. 10 a.m., 84.64 ft., 567,400 sec.-ft.; 2 p.m., 84.15 ft., 557,200 sec.-ft.; 

9 p.m., 83.85 ft., 551,000 sec.-ft.

18. 10 a.m., 84.37 ft., 561,800 sec.-ft.; 2 p.m., 84.10 ft., 556,100 seo.-ft. 

19; 10 p.m., 82.40 ft., 522,000 sec.-ft.

20. 2 a.m., 82.45 ft., 523,000 sec.-ft.; 9 a.m., 82.53 ft., 524,600 sec.-ft.; 

7 p.m., 82.03 ft., 514,600'sec.-ft.; 9 p.m., 82.40 ft., 522,000 sec.-ft.

21. 6 a.m., 80.67 ft., 489,100 sec.-ft.
COLOMBIA RIVER MAIN STEM 53'

Columbia River at Trinidad, Wash.

Location.- Lat. 470 13 I 30", long. 120°00'50", In SEi sec. 13, T. 20 N., R. 22 E., half 

a mile southwest of Trinidad, 8j miles downstream from Colocham Creek, and 12 miles 

downstream from Rock Island Dam. Datum of gage Is 500 feet above mean sea level, 

subject to correction to datum of 1929.

Drainage area.- 89,700 square miles.

dage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 692,600 second-feet 10:30 p.m. June 12 (gage 

Height, 59.35 feet).

1913 to April 1948: Discharge, 528,000 second-feet June 15, 16, 1913 (gage 

height, 45.7 feet, site and datum then In use).

Discharge known, about 740,000 second-feet June 7, 1894 (based on Information 

obtained at other points).

Remarks.- Plow regulated by Franklin D. Roosevelt Lake and reservoirs In Kootenal, 

Pend Orellle, Spokane, Okanogan, and Chelan River Basins. The many diversions 

above station for Irrigation are probably a small percentage of flood discharge.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

154,200

162,700

163,900

166,600

164,200

171,400

172,800

170,200

188,500

199,900

June

609,800

612,000

614,400

624,600

627,000

637,000

639,700

641,900

658,500

667,600

July

409,800

392,000

376,800

351,000

337,500

332,800

312,600

304,500

281,900

273,600

Day

11

12

13

14

15

16

17

18

19

20

May

200,400

205,800

210, 700

233,600

228,400

232,000

236, 700

238,600

246,600

263,500

June

685, 700

689,900

682,700

663,900

641,100

625,200

620,100

613,600

606,200

585,400

July

268,000

257,600

248,300

236,800

230,500

223,600

218,800

213,200

206,800

205,700

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet..... .................................. _ .................... __ ...

Runoff, in inches............................................................................................................................

May

277,600

299,800

336,200

360,200

395,100

426,400

461,400

513,600

557,400

611,000

605,700

285,600

3.67

June

571,800

550,300

535,400

519,800

502,000

486,600

476,000

460,700

445,000

425,400

590,600

7.35

July

195,600

191,500

189,600

185,200

189,300

181,300

182,600

178,500

184,300

176,100

173,200

248,700

3.20

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

fiSt| Discharge

May 17

39.07 

39.06 

39.07 

39.26 

39.30 

39.31

235,200 

235,100 

235,200 

238,300 

238,900 

239,100

May 23

44.59 

44.92 

45.02 

45.09 

45.09 

45.28

Mi

54.00 

54.28 

54.60 

54.86 

55.23 

55.73

330,500 

336,800 

338,700 

340,000 

340,000 

343,900

ty29

540,900 

548,200 

556,500 

563,500 

573,500 

587,000

June 4

57.OO 

57.04 

57.03 

57.09 

57.19 

57.15

622,800 

624,000 

623,700 

625,400 

628,300 

627,200

June 10

58.30 

58.29 

58.41 

58.61 

58.81 

58.96

Ju

57.17 

56.87 

56.77 

57.04 

57.24 

57.30

660,800 

660,500 

664,100 

670,100 

676,100 

680,600

ne!6

627,700 

619,000 

616,200 

624,000 

629,800 

631,500

Gage 

height Discharge

May 18

39.29 

39.23

39.19 

39.21 

39.24 

39.30

ME

45.56 

45.83 

46.09 

46.36 

46.73 

47.02

Mi

56.28 

56.61 

56.81 

56.90 

56.77 

56.. 56

Ju

57.11 

57.11 

57.11 

57.14 

57.20 

57.26

238,700 

237,800 

237,100 

237,500 

237,900 

238,900

y24

349,000 

354,400 

359,600 

365,000 

372,400 

378,300

»y30

602,400 

611,700 

617,300 

619,900 

616,200 

610,300

ne5

626.000 

626,000 

626,000 

626,900 

628,600 

630,300

June 11

58.92 

59.04 

59.17 

59.22 

59.30 

59.26

Ju

57.04 

56.81 

56.75 

56.80 

56.90 

56.96

679,400 

683,000 

687,000 

688,500 

691,000 

689,800

ne!7

624,000 

617,300 

615,600 

617,000 

619,900 

621,600

Gage 

height Discharge

May 19

39.40 

39.54 

39.77 

39.90 

40.20 

40.45

Mi

47.31 

47.60 

47.84 

48.09 

48.30 

48.50

240,500 

242,700 

246,400 

248,500 

253,300 

257,300

jy25

384,400 

390,500 

395,500 

400,800 

405,400 

409,800

May 31

56.39

56.30 

56.31 

56.40 

56.45 

56.48

Ju

57.31 

57.41 

57.50 

57.60 

57.64 

57.70

605,500 

603, .000 

603,300 

605,800 

607,200 

608,000

ne6

631,800 

634,700 

637,300 

640,200 

641,400 

643,100

June 12

59.24

59.12 

59.12 

59.27 

59.32 

59.30

689,100 

685,400 

685,400 

690,100 

691,600 

691,000

June 18

56.86 

56.70 

56.58 

56.56 

56.58 

56.64

618,700 

614,200 

610,800 

610,300 

610,800 

612,500

Gage 

height Discharge

May 20

40.66 

40.74 

40.80 

40.90 

41.08 

41.18

260,700 

261,900 

262,900 

264,600 

267,700 

269,400

May 26

48.71 

48.94 

49.20 

49.50 

49.84 

50.14

Ju

56.50 

56.45 

56.50 

56.60 

56.64 

56.64

Ju

57.69 

57.58 

57.51 

57.50 

57.55 

57.64

Ju

59.21 

59.13 

59.00 

58.91 

58.88 

58.80

414,400 

419,500 

425,200 

431,800 

439,500 

446,400

me 1

608,600 

607,200 

608,600 

611,400 

612,500 

612,500

ne7

642,800 

639,700 

637,700 

637,300 

638,800 

641,400

ne!3

688,200 

685,700 

681,800 

679,100 

678,200 

675,800

June 19

56.60 

56.50 

56.37 

56.35 

56.29 

56.10

611,400 

608,600 

605,000 

604,400 

602,700 

597,400

^Discharge

May 21

41.30 

41.38 

41.56 

41.85 

42.10 

42.36

271,400 

272,800 

275,800 

280,800 

285,000 

289,600

May 27

50.30 

50.50 

50.67 

50.93 

51.33 

51.81

Ju

56.62 

56.57 

56.56 

56.64 

56.68 

56.68

Ju

57.59 

57.55 

57.55 

57.66 

57.80 

57.94

Ju

58.65 

58.51 

58.44 

58.30 

58.14 

57.97

450,100 

454,700 

458,600 

464,700 

474,300 

485,800

ne2

612,000 

610,600 

610,300 

612,500 

613,600 

613,600

ne8

639,900 

638,800 

638,800 

641,900 

646,000 

650,100

ne!4

671,300 

667,100 

665,000 

660,800 

656,000 

650,900

June 20

55.95

55.71 

55.56 

55.50 

55.50 

55.46

593,200 

586,500 

582,400 

580,800 

580,800 

579,700

GJJ&I Discharge

May 22

42.59 

42.73 

42.80 

42.95 

43.35 

43'. 96

Ma

52.20 

52.57 

53.00 

53.30 

53.67 

53.83

293,700 

296,200 

297,500 

300,200 

307,400 

318,500

y28

495,300 

504,600 

515,300 

522,800 

532,300 

536,500

June3

56.67 

56.67 

56.66 

56.70 

56.75 

56.89

Ju

57.96 

58.01 

58.19 

58.40 

58.54 

58.54

Ju

57.78 

57.61 

57.46 

57.56 

57.64 

57.51

Ju

55.40 

55.34 

55.24 

55.10 

54.85 

54.69

613,400 

613,400 

613,100 

614,200 

615,600 

619,600

ne9

650,600 

652,100 

657,500 

663,800 

668,000 

668,000

nelS

645,400 

640,500 

636,100 

639,000 

641,400 

637,600

ne21

578,100 

576,500 

573,800 

570,000 

563,200 

558,900

Supplemental record.- June 12, 10:30 a.m., 59.35 ft., 692,600 sec.-ft.
54 FLOODS OP MAY-JDNE 1948 IN COLUMBIA RIVER BASIN

Columbia River near The Dalles, Oreg.

Location.- Lat. 45°39', long. 120°58', In NE£ sec. 20, T. 2 N., R. 15 E., Just upstream 

from Celllo Palls, 3 miles downstream from Deschutes River, and 11 miles east of 

The Dalles. Datum of gage Is at mean sea level, datum of 1929. (See pi. 7A.)

Drainage area.- 237,000 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements 

below I,0l0,000 second-feet: extended to 1,240,000 second-feet. Gage heights used 

to hundredths.

Maxima.- May-June 1948: Discharge, 1,010,000 second-feet 1:30 p.m., 3:00 p.m., and 

6:30 p.m. May 31 (elevation, 154.56 feet).

1858 to April 1948: Discharge, 1,240,000 second-feet (revised) June 6, 1894 (elevation, 106.5 feet on gage at The Dalles, 160.1 feet at present site).

Remarks.- Storage and diversions for Irrigation are only a small part of total runoff. 

Some regulation by Franklin D. Roosevelt Lake above Grand Coulee Daro and many smaller 

reservoirs.

Mean discharge, in second-feel, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

261,000

270,000

272,000

273,000

276,000

278,000

280,000

291,000

320,000

352,000

June

980,000

949,000

934,000

937,000

960,000

958,000

947,000

948,000

949,000

959,000

July

541,000

518,000

498,000

473,000

456,000

432,000

411,000

396,000

376,000

360,000

Day

11

12

IS

14

15

Ifi

17

18

19

20

May

375,000

364,000

358,000

353,000

385,000

388,000

385,000

394,000

418,000

448,000

June

963,000

969,000

964,000

942,000

915,000

877,000

846,000

831,000

812,000

794,000

July

347,000

333,000

317,000

303,000

292,000

281,000

272,000

264,000

260,000

253,000

Day

21

22

23

24

25

26

27

38

»

30

31

Runoff, in inches ........................ ........... ........ ....

May

488,000

535,000

584,000

668,000

676,000

698,000

746,000

806,000

876,000

944,000

999,000

476,200

2.32

June

766,000

744,000

727,000

708,000

678,000

645,000

626,000

599,000

579,000

562,000

835,600

3.93

July

251,000

246,000

241,000

235,000

229,000

223,000

215,000

215,000

215,000

217,000

216,000

318,900

1.55

Elevation, In feet, and discharge, Ir. second-feet, at Indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

vat!;J Disch^e

May 17

138.76 

138.75 

138.72 

138.75 

138.79 

138.86

385,000 

385,000 

384,000 

385,000 

1386,000 

389,000

May 23

143.39 

143.59 

143.85 

144.21 

144.73 

145.33

Mi

150.74 

151.02 

151.33 

151.75 

152.09 

152.33

Ju

152. 8C 

152.78 

152.79 

152.89 

153.02 

153.13

560,000 

567,000 

577,000 

591,000 

611,000 

635,000

iy29

849,000 

860,000 

873,000 

890,000 

904,000 

914,000

ne 4

933, OOC 

932,000 

932,000 

936,000 

942,000 

946,000

June 10

153.38 

153.34 

153.40 

153.54 

153.59 

153.56

Ju

151.79 

151.56 

151.35 

151.22 

151.17 

151.07

957,000 

955,000 

957,000 

963,000 

965,000 

964,000

ne!6

891,000 

882,000 

873,000 

868,000 

866,000 

862,000

vlll~J Discharge

May 18

138.90 

138.91 

138.96 

139.06 

L39.19 

139.31

390,000 

390,000 

392,000 

396,000 

401,000 

405,000

May 24

L45.83 

146.19 

146.40 

146.45 

146.41 

146.36

M:

152.54 

152. 7C 

153.00 

153.32 

153.66 

153.96

Ju

L53.25 

153.39 

153.52 

153.61 

153.66 

153.60

654,000 

668,000 

677,000 

679,000 

677,000 

675,000

iy30

922,000 

929,000 

941,000 

954,000 

968,000 

980,000

ne5

951,000 

957,000 

962,000 

966,000 

968,000 

966,000

June 11

153.52 

153.49 

153.45 

L53.50 

L53.66 

153.71

962,000 

957,000 

959,000 

962,000 

968,000 

970,000

June 17

L50.92 

150.75 

150.62 

150.55 

150.50 

150.48

856,000 

849,000 

844,000 

841,000 

839,000 

838,000

Ei?"J Discharge 

vat Ion

May 19

139.44 

139.52 

139.64 

139.85 

139.90 

140.08

M:

146.31 

146.29 

146.30 

146.39 

146.47 

146.53

M:

154.21 

154.4J 

154.53 

154.53 

154.52 

154.42

Jl

L53.55 

L53.47 

L53.40 

L53.35 

L53.29 

153.22

Ju

153.69 

153.69 

153.70 

153.70 

153 . 67 

153.62

410,000 

413,000 

418,000 

425,000 

427,000 

434,000

iy25

673,000 

673,000 

673,000 

676,000 

679,000 

682,000

iy31

991, OOC 

999, OOC 

U303,000 

LP03.000 

.,003,000 

999,000

ne6

964,000 

960,000 

957,000 

955,000 

953,000 

946,000

ne!2

969,000 

969,000 

970,000 

970,000 

968,000 

966,000

June 18

150.42 

150.35 

150.26 

150.19 

150.10 

150.02

843,000 

833,000 

829,000 

827,000 

823,000 

820,000

v^-J Discharge

May 20

L40.26 

L40.36 

140.44 

140.54 

L40.66 

140.80

441,000 

445,000 

448,000 

452,000 

456,000 

461,000

May 26

L46.60 

L46.71 

L46.88 

147.14 

L47.35 

L47.50

Ju

154.26 

154.07 

153.89 

L53.79 

L53.68 

L53.53

Ju

153.17 

L53.ll 

L53.ll 

L53.15 

L53.18 

L53.18

684,000 

689,000 

695,000 

705,000 

714,000 

720,000

inel

993,000 

985, OOC 

977,000 

973,000 

968,000 

964,000

ne7

948,000 

946,000 

946,000 

947,000 

948,000 

948,000

June 13

L53.63 

L53.59 

L53.58 

L53.56 

L53.49 

L53.39

967,000 

965,000 

965,000 

964,000 

961,000 

957,000

June 19

L5O.OO 

149.95 

149.83 

149.76 

149.68 

L49.59

819,000 

817,000 

812,000 

809,000 

806,000 

803,000

tatloJ 1*8'*"*6

May 21

L40.96 

L41.22 

L41.48 

L41.85 

L42.12 

L42.36

467,000 

470,000 

487,000 

501,000 

512,000 

521,000

May 27

147 . 68 

147.87 

148.10 

148.44 

148.73 

148.96

727,000 

734,000 

743,000 

757,000 

768,000 

777,000

June 2

153.38 

153.24 

153.15 

153.09 

153.02 

152.96

Ju

153.16 

L53.ll 

153.10 

L53.12 

L53.19 

L53.17

957,000 

951,000 

947,000 

945,000 

942,000 

939,000

ne8'

948,000 

946,000 

945,000 

946,000 

952,000 

948,000

June 14

153.29 

153.16 

153.02 

L52.90 

152.78 

152.65

953,000 

948,000 

942,000 

937,000 

932,000 

927,000

June 20

149.56 

149.48 

149.37 

149.26 

149 . 17 

149.11

801,000 

798,000 

794,000 

789,000 

786,000 

783,000

£J£J Discharge

May 22

L42.46 

L42.54 

L42.69 

L42.89 

L43.08 

L43.24

524,000 

528,000 

533,000 

541,000 

548,000 

554,000

May 28

L49.16 

L49.36 

L49.58 

L49.93 

L50.25 

150.53

Ju

L52.87 

152.72 

L52.73 

L52.79 

L52.84 

152.87

Ju

L53.14 

.53.10 

.53.14 

L53.22 

.53.30 

L53.31

Ju

L52.56 

L52.46 

L52.35 

L52.28 

152,20 

151.99

785,000 

793,000 

802,000 

816,000 

829,000 

840,000

neS

936,000 

930,000 

930,000 

938,000 

934,000 

936,000

ne9

947,000 

945,000 

947,000 

950,000 

953,000 

954,000

ne!5

923,000 

919,000 

914,000 

Sll.OOO 

908,000 

900,000

June 21

148.98 

148.80 

148.65 

148.51 

148.42 

148.36

778,000 

771,000 

765,000 

759,000 

756,000 

753,000

Supplemental record.- May 51, 1:30 p.m., 3 p.m. and 6:30 p.m., 154.56 ft., 1,010,000 

sec.-ft.
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 7

A. COFFERDAM AT McNARY DAM SITE OVERTOPPED BY COLUMBIA RIVER. 

Courtesy of Engineering News-Record.

B. GRANDE RONDE RIVER AT LOWER END OF STATE DITCH, LOOKING SOUTHWEST. 

Courtesy of Corps of Engineers, United States Army.

FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 55

Kootenai River Basin

Kootenay River at Canal Flats, British Columbia

Location.- Lat. 508 08'57 n , long. 115 0 47'42", 1 mile southeast of Canal Flats and about

47 miles north of Cranbrook. Datum of gage is 2,675.09 feet above mean sea level,

datum of Geodetic Survey of Canada, adjustment of 1945. 

Drainage area.- 2,040 square miles. 

Gage-height record.- Staff gage read once daily. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 31,300 second-feet May 24 (gage height, 8.10 feet). 

 T939 to April 1948: Discharge, 22,800 second-feet May 29, 1946 (gage height, 7.10

feet). 

Remarks.- Records furnished by Dominion Water and Power Bureau, Department of Mines and

Resources, Canada.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

to

May

2,600

2,440

2,210

2,140

2,130

2,140

2,240

2,530

2,580

2,580

June

17,500

17,600

17,900

17,500

- 18,700

19,000

20,000

21,900

22,300

18,600

July

9,480

8,530

7,500

6,960

6,490

6,800

6,640

6,200

5,770

5,230

Day

11

12

13

14

15

16

17

18

19

20

May

2,580

2,740

2,830

2,980

2,950

2,880

3,440

4,770

6,060

6,940

June

14,600

12,300

11,600

11,200

12,000

11,500

11,000

9,730

9,480

9,730

July

5,230

5,910

6,800

6,200

5,640

5,640

5,500

5,640

5,500

5,500

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet

Runoff, in inches ............................................................................................................................

May

9,300

15,000

24,000

29,700

27,200

26,600

26,300

26,300

23,200

19,400

17,300

9,870

5.58

June

10,200

9,980

11,800

11,100

9,980

9,480

9,480

8,980

8,980

9,480

13,400

7.33

July

5,640

5,640

5,910

5,640

5,360

5,230

4,830

4,960

5,360

5,360

4,830

3.39

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

8a

8a

8

5

8a

8

5

8a

8a

8a

11:152

8a

height Discharge

May 17

3.15 3,440

May 18

3.75 4,770

May 19

4.15

4.30

Maj

4.50

5,850

6,300

r 20

6,940

May 21

5.00

5.20

8,860

9,780

May 22

6.05 15,000

May 23

7.25

Maj

8.10

7.75

24,000

r 24

31,300

28,700

May 25

7.62 27,200

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

8a

Gage 

height Discharge

May 26

7.55 26,600

May 27

7.50 26,300

May 28

7.50 26,300

May 29

7.10 23,200

May 30

6.60 19,400

May 31

6.30 17,300

June 1

6.32 17,500

June 2

6.33

Juti

6.36

17,600

e 3

17,900

June 4

6.30 17,500

Hour

8

9

11

12:10

8a

8a

8a

8a

8a

8a

8a

Gage

height Discharge

June 5

6.48

6.48

6.45

6.45

18,700

18,700

18,600

18,600

June 6

6.52 19,000

June 7

6.65 20,000

June 8

6.90 2i; 900

June 9

6.95 22,300

June 10

6.45 18,600

June 11

5.85

Jur

5.45

14,600

e 12

12,300

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

Gage 

height Discharge

June 13

5.32 11,600

June 14

5.25 11,200

June 15

5.40 12,000

June 16

5.30 11,500

June 17

5.20 11,000

June 18

4.95 9,730

June 19

4.90 9,480

June 20

4.95

Jun

5.05

9,730

e 21

10,200
56 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Kootenay River at Wardner, British Columbia

Location.- Lat. 49°20'05", long. 115°25'42", at highway bridge a third of a mile east 

 of tfardner station, above mouth of Elk River and below mouth of Bull River. Datum

of gage is 2,523.223 feet above mean sea level, datum of Geodetic Survey of Canada,

adjustment of 1928. 

Drainage area.- 5,200 square miles.

Gage-height record.- Standard chain gage read once daily. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Gage heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 65,000 second-feet noon May 29 (gage height, 13.17

1914 to April 1948: Discharge, 67,500 second-feet June 21, 1916 (gage height, 

14.3 feet).

Remarks.- Records furnished by Dominion Water and Power Bureau, Department of Mines and 

Resources, Canada.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

9,120

8,910

8,350

7,840

7,420

7,290

7,290

7,950

8,210

8,410

June

48,400

47,400

41,000

49,600

41,900

52,800

52,800

53,200

54,600

54,100

July

21,800

20,900

18,300

16,500

15,000

14,800

14,800

14,200

13,400

12,400

Day

11

12

13

14

15

16

17

18

19

20

May

8,290

8,350

8,940

9,860

9,790

9,450

10,000

12,700

16,200

21,000

June

55,000

50,600

39,400

39,200

34,000

34,400

34,400

30,200

27,400

24,100

July

11,700

11,700

12,200

12,800

11,800

11,600

11,300

10,900

10,900

11,000

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ............... .................................................

Runoff, in inches ............................................................................................................................

May

24,700

34, 400

49,200

53,300

58,400

62,700

63,300

63,700

63,700

60,500

53,700

25,300

5.62

June

21,100

21,500

21,400

21,500

22,100

20,600

23,000

21,900

'21,800

21,800

36,400

7.81

July

10,900

11, 900

10,700

10,800

10,800

10,000

9,210

9,450

10,600

10,400

10,000

12,700

2.81

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

8a

8a

8a

8a

8a

8

11:34

5:05

8a

8a

8a

Gage 

height Discharge

May 17

4.64 10,000

May 18

5.42 12,700

May 19

6.36 16,200

May 20

7.44 21,000

May 21

8.10 24,700

May 22

9.60

9.80

10.17

May

11.50

34,400

35,800

38,500

23

49,200

May 24

11.96 53,300

May 25

12.50 58,400

Hour

8a

8a

8a

8

10:10

11:10

N

1:20

8a

8a

8a

8a

Gage 

height Discharge

May 26

12.94 62,700

May 27

13.00 63,300

May 28

13.04 63,700

May 29

13.04

13.09

13.12

13.17

13.05

May

12.72

63,700

64,200

64,500

65,000

63,800

30

60,500

May 31

12.00

June

11.40

June

11.28

53,700

1

48,400

2

47,400

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

Gage 

height Discharge

June 3

10.50 41,000

June 4

11.54 49,600

June 5

11.80 51,900

June 6

11.90 52,800

June 7

11.90 52,800

June 8

11.94

Jun

12.10

Jun

12.04

Jun

12.14

53, 200

e 9

54,600

e 10

54,100

e 11

55,000

Hour

8a

8a

8a

8a

8a

8a

8a

8a

8a

8a

Gage 

height Discharge

June 12

11.65 50,600

June 13

10.30 39,400

June 14

10.26 39,200

June 15

9.54 34,000

June 16

9.60 34,400

June 17

9.60

Jun

9.00

Jun

8.55

Jun

8.00

Jun

7.46

34,400

e 18

30,200

e 19

27,400

e 20

24,100

e 21

21,100
KOOTENAI RIVER BASIN

Kootenay River at Newgate, British Columbia 

(international gaging station)

Location.- Lat. 49°01', long. 115C 10', 100 feet above old highway bridge site and former 

staff gage, 0.7 mile northwest of Newgate, and 0.9 mile north of international boundary. 

Datum of gage is 2,310.23 feet above mean sea level, datum of Geodetic Survey of 

Canada, adjustment of 1945.

Drainage area.- 7,660 square miles.

.Page-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

67,000 second-feet and extended to peak stage. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 91,900 second-feet 10:30 a.m. May 28 (gage height, 

15.00 feet).

1930 to April 1948: Discharge observed, 80,000 second-feet June 18, 1933 (gage 

height, 13.30 feet, present datum).

Remarks.- Records give total flow of main channel and slough. This is one of the international gaging stations maintained by Canada under agreement with the United States.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

17,600

17,300

15,700

14,700

13,800

13,100

13,000

13,700

14,500

15,000

June

67,600

65,000

64,000

64,100

65,400

65,400

65,000

65,200

65,900

66,200

July

30,100

29,500

27,300

24,600

22,700

21,400

21,000

20,200

18,900

17,500

Day

11

12

13

14

15

16

17

18

19

20

May

14,600

14,300

15,100

16,900

17,100

16,700

17,500

20,900

27,800

36,100

June

65,100

61,400

52,300

46,400

44,200

42,600

41,900

40,900

37,700

35,800

July

16,300

15,700

15,800

16,500

16,000

15,400

15,000

14,600

14,700

15,100

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . . ........

Runoff, in inches ............................................... ... . .....................................................................

May

40,800

51,200

69,100

80,500

85,400

88,100

90,700

91,500

88,600

83,100

74,200

38,300

5.76

June

35,700

35,700

35,900

36,400

36,300

35,200

33,500

32,000

30,900

30,200

48,800

7.11

July

15,200

15,000

14,600

14,400

14,400

13,600

12,500

12,900

14,700

16,100

15,800

17,700

2.66

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4' 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

^(Discharge

May 17

6.67 

6.70 

6.77 

6.84 

6.92 

7.98

16,900 

17,100 

17,400 

17,800 

18,200 

25,200

May 23

12.33 

12.58 

12.86 

13.05 

13.22 

13.45

Mi

14.81 

14.76 

14.72 

14.69 

14.68 

14.54

64,300 

66,800 

69,600 

71,500 

73,200 

75,600

iy29

89,800 

89,300 

88,800 

88,400 

88,200 

86,800

June 4

12.58 

12.59 

12.62 

12.66 

12.71 

12.75

63,900 

63,900 

64,100 

64,400 

65,000 

65,300

June 10

12.90 

12.90 

12.88 

12.87 

12.86 

12.85

Ju

10.52 

10.52 

10.50 

10.47 

10.44 

10.40

66,400 

66,400 

66,100 

66,000 

65,900 

65,800

ne!6

43,000 

43,000 

42,800 

42,500 

42,300 

41,900

Gage 

height Discharge

May 18

7.10 

7.23 

7.38 

7.53 

7.68 

7.81

19,200 

20,000 

20,900 

21,900 

23,000 

23,900

May 24

13.72 

13.88 

13.93 

14.03 

14.12 

14.18

M

14.45 

14.40 

14.23 

14.09 

13.95 

13.81

Ju

12.80 

12.81 

12.82 

12.82 

12.82 

12.81

Ju

12.86 

12.84 

12.78 

12.73 

12.70 

12.68

78,500 

80,100 

80,700 

81,700 

82,700 

83,300

»y30

86,700 

85,100 

83,300 

81,700 

80,200 

78,600

ne 5

65,700 

65,700 

65,700 

65,700 

65,600 

65,400

ne 11

65,900 

65,700 

65,100 

64,600 

64,200 

64,000

June 17

10.39 

10.38 

10.41 

10.42 

10.41 

10.40

41,800 

41,700 

42,000 

42,100 

42,000 

41,900

Gage 

height Discharge

May 19

7.94 

8.12 

8.33 

8.50 

8.70 

8.90

24,800 

26,200 

27,800 

29,000 

30,600 

32,200

May 25

14.26 

14.33 

14.40 

14.46 

14.50 

14.51

Ms

13.63 

13.52 

13.42 

13.28 

13.16 

13.05

Ju

12.81 

12.81 

12.81 

12.81 

12.79 

12.77

84,100 

84,900 

85,600 

86,200 

86,600 

86,800

iy31

76,600 

75,400 

74,300 

72,700 

71,400 

70,200

ne6

65,400 

65,400 

65,400 

65,400 

65,200 

65,000

June 12

12.61 

12.56 

12.49 

12.37 

12.23 

12.05

63,300 

62,800 

62,000 

60,800 

59,300 

57,500

June 18

10.37 

10.33 

10.29 

10.24 

10.17 

10.11

41,600 

41,300 

40,900 

40,500 

39 , 800 

39,300

Gage 

height Discharge

May 20

9.07 

9.23 

9.38 

9.48 

9.58 

9.64

33,700 

35,200 

36,500 

37,400 

38,300 

38,900

May 26

14.52 

14.56 

14.61 

14.68 

14.78 

14.83

86,900 

87,300 

87,800 

88,500 

89,600 

90,100

June 1

12.96 

12.88 

12.83 

12.79 

12.73 

12.68

Ju

12.76 

12.76 

12.77 

12.78 

12.76 

12.76

69,200 

68,300 

67,700 

67,200 

66,500 

65,900

ne7

64,900 

64,900 

65,000 

65,100 

64,900 

64,900

June 13

11.85 

11.65 

11.50 

11.35 

11.21 

11.11

55,500 

53,500 

52,000 

50,600 

49,300 

48,300

June 19 "!

10.04 

9.97 

9.92 

9.86 

9.80 

9.75

38,400 

38,100 

37,700 

37,200 

36,700 

36,300

Gage 

height

Me

9.67 

9.70 

9.74 

9.78 

10.30 

10.19

Discharge

iy21

39,100 

39,400 

39,800 

40,100 

44,800 

43,800

May 27

14.83 

14.88 

14.90 

14.93 

14.95 

14.95

90,100 

90,600 

90,800 

91,200 

91,400 

91,400

June 2

12.65 

12.63 

12.63 

12.63 

12.61 

12.59

Ju

12.76 

12.78 

12.79 

12.81 

12.81 

12.81

65,500 

65,200 

65,200 

65,100 

64,800 

64,500

ne8

64,900 

65,100 

65,200 

65,400 

65,400 

65,400

June 14

11.00 

11.02 

10.91 

10.83 

10.76 

10.71

47,300 

47,500 

46,500 

45,800 

' 45,100 

44,700

June 20

9.72 

9.70 

9.68 

9.67 

9.66 

9.65

36,000 

35,800 

35,700 

35,600 

35,500 

35,400

Gage 

height Discharge

May 22

10.51 

10.79 

11.00 

11.16 

11.67 

12.08

46,700 

49,300 

51,300 

52,800 

57,700 

61,800

May 28

14.96 

14.99 

14.99 

14.96 

14.97 

14.87

91,500 

91,800 

91,800 

91,500 

91,100 

90,500

June 3

12.57 

12.56 

12.62 

12.63 

12.60 

12.56

Ju

12.82 

12.84 

12.86 

12.88 

12.90 

12.92

64,200 

64,100 

64,600 

64,600 

64,200 

64,000

ne9

65,500 

65,700 

65,900 

66,100 

66,400 

66,600

June 15

10.68 

10.65 

10.64 

10.62 

10.59 

10.55

44,200 

44,200 

44,100 

43,900 

43,600 

43,200

June 21

9.64 

9.65 

9.68 

9.70 

9.71 

9.70

35,300 

35,400 

35,700 

35,800 

35,900 

35,800
58 FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Kootenal River at Libby, Mont.

Location.- Lat. 48°24', long. 1150 33', in JWi sec. 3, T. 30 N., R. 31 W., 1,200 feet 

downstream from highway bridge at Libby and half a mile downstream from Libby Creek.

Drainage area.- 10,240 square miles.

Gage-height 'record.- Water-stage recorder graph until 12 p.m. June 8j thereafter, graph 

based on inside gage equivalents of once-daily wire-weight gage readings. No gageheight record July 18-25.

Discharge record.- Stage-discharge relation defined by current-meter measurements below ( 

87,000 second-feet and extended to peak stage. Discharge for period of no gageheight record computed on basis of records for Flathead River at Columbia Falls.

Maxima.- May-June 1948: Discharge, 122,000 second-feet 10 a.m. May 28 (gage height,

 T9T53 feet).

1910 to April 1948: Discharge, 130,000 second-feet June 21, 1916 (gage height, 

20.7 feet, present datum).

Remarks.- No regulation or diversion.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

26,500

25,800

23,700

22,200

21,300

20,500

21,300

23,100

25,200

24,800

June

89,500

84,300

82,800

82,900

84,700

84,600

83,700

83,200

84,000

85,200

July

31,100

30,400

28,800

26,800

23,600

21,800

21,800

21,600

20,200

19,200

Day

11

12

13

14

15

16

17

18

19

20

May

23,400

22,600

23,300

25,300

25,500

24,700

25,800

29,600

37,200

49,700

June

83,700

77,800

67,300

56,200

51,300

49,700

49,900

47,900

43,800

40,700

July

18,300

17,500

17,400

17,700

17,600

16,900

16,600

16,000

15,500

15,000

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ............... . . .................................

Runoff, in inches ......................................... ... .............................................................................

May

59,800

68,000

85,300

99,100

108,000

113,000

118,000

121,000

120,000

114,000

101,000

5.91

June

39,900

40,200

40,000

40,600

40,800

39,100

36,500

34,000

32,600

31,700

6.49

July

16,000

16,500

16,500

16,000

15,500

15,300

14,500

13,800

15,300

17,000

17,400

2.13

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

7.72 

7.80 

7.87 

7.93 

8.02 

8.15

25,100 

25,400 

25,800 

26,000 

26,400 

27,100

May 23

15.66 

15.99 

16.36 

16.62 

16.89 

17.11

Ms

19.82 

19.79 

19.74 

19.68 

19.63 

19.54

Ju

16.07 

16.05 

16.04 

16.05 

16.10 

16.16

79,300 

82,300 

85,800 

88,400 

91,100 

93,300

iy29

121,000 

120,000 

120,000 

119,000 

118,000 

118,000

he 4

82,900 

82,700 

82,600 

82,700 

83,200 

83,800

June 10

16.28 

16.32 

16.32 

16.30 

16.29 

16.28

Ju

12.45 

12.40 

12.42 

12.46 

12.52 

12.59

85,000 

85,400 

85,400 

85,200 

85,100 

85,000

ne!6

49,600 

49,200 

49,400 

49,700 

50,200 

50,700

Gage height Discharge

May 18

8.32 

8.48 

8.63 

8.79 

9.01 

9.26

27,900 

28,700 

29,400 

30,200 

31,300 

32,600

May 24

17.31 

17.49 

17.69 

17.87 

18.08 

18.25

M

19.46 

19.34 

19.18 

19.01 

18.81 

 18.60

Ju

16.22 

16.25 

16.26 

16.27 

16.26 

16.28

Ju

16.27 

16.25 

16.18 

16.10 

16.00 

15.91

95,300 

97,100 

99,100 

101,000 

103,000 

105,000

iy30

117,000 

116,000 

114,000 

112,000 

110,000 

108,000

ne 5

84,400 

84,700 

84,800 

84,900 

84,800 

85,000

nell

84,900 

84,700 

84,000 

83,200 

82,200 

81,300

June 17

12.60 

12.51 

12.48 

12.44 

12.41 

12.37

50,800 

50,100 

49,800 

49,500 

49,300 

49,000

Gage 

height Discharge

May 19

9.57 

9.81 

10.02 

10.38 

10.71 

11.03

34,200 

35,500 

36,700 

38,700 

40,700 

42,600

May 25

18.41 

18.50 

18.58 

18.63 

18.72 

18.85

106,000 

107,000 

108,000 

108,000 

109,000 

111,000

May 31

18.41 

18.16 

17.91 

17.66 

17.44 

17.25

Ju

16.26 

16.24 

16.23 

16.21 

16.22 

16.22

106,000 

104,000 

101,000 

98,800 

96,600 

94,700

ne6

84,800 

84,600 

84,500 

84,300 

84,400 

84,400

June 12

15.80 

15.69 

15.57 

15.44 

15.31 

15.15

80,200 

79,100 

77,900 

76,600 

75,300 

73,700

June 18

12.34 

12.30 

12.23 

12.15 

12.07 

11.97

48,800 

48,500 

48,000 

47,400 

46,900 

46,200

Gage 

height Discharge

May 20

11.31 

11.64 

11.93 

12.28 

12.95 

13.25

44,500 

46,700 

48,700 

51,200 

56,400 

58,800

May 26

19.00 

19.08 

19.15 

19.16 

19.19 

19.29

Ju

17.06 

16.86 

16.68 

16.53 

16.43 

16.40

Ju

16.21 

16.16 

16.12 

16.11 

16.13 

16.14

112,000 

113,000 

114,000 

114,000 

114,000 

115,000

ne 1

92,800 

90,800 

89,000 

87,500 

86,500 

86,200

ne7

84,300 

83,800 

83,400 

83,300 

83,500 

83,600

June 13

14.94 

14.73 

14.52 

14.27 

14.03 

13.83

71,600 

69,500 

67,400 

65,100 

63,000 

61,200

June 19

11.85 

11.72 

11.60 

11.49 

11.39 

11.32

45,400 

44,400 

43,600 

42,900 

42,200 

41,800

Gage 

height

Mi

13.36 

13.38 

13.34 

13.35 

13.39 

13.59

Discharge

iy21

59,700 

59,800 

59,500 

59,600 

59,900 

61,500

May 27

19.43 

19.53 

19.61 

19.64 

19.68 

19.76

116,000 

118,000 

118,000 

119,000 

119,000 

120,000

June 2

16.34 

16.26 

16.17 

16.13 

16.11 

16.11

Ju

16.10 

16.07 

16.11 

16.10 

16.10 

16.12

Ju

13.62 

13.39 

13.19 

13.07 

12.95 

12.86

Ju

11.24 

11.19 

11.15 

11.11 

11.07 

11.04

85,600 

84,800 

83,900 

83,500 

83,400 

83,400

ne8

83,200 

82,900 

83,300 

83,200 

83,200 

83,400

ne 14

59,300 

57,200 

55,500 

54,600 

53,600 

52, 900

ne20

41,300 

40, 900 

40,700 

40,400 

40,200 

40,000

Gage 

height

M.

13.81 

14.00 

14.22 

14.59 

15.06 

15.33

Ma

19.86 

19.91 

19.92 

19.89 

19.85 

19.83

Ju

16.11 

16.07 

16.04 

16.01 

16.03 

16.07

Discharge

iy22

63,300 

64, 900 

66,800 

69,900 

73,900 

76,400

y28

121,000 

122,000 

122,000 

121,000 

121,000 

121', 000

ne3

83,400 

82,900 

82,600 

82,300 

82,500 

82,900

June 9

16.15 

16.16 

16.18 

16.20 

16.22 

16.25

Ju

12.77 

12.70 

12.64 

12.61 

12.55 

12.50

Ju

11.01 

11.00 

11.02 

11.04 

11.05 

11.07

83,700 

83,800 

84,000 

84,200 

84,400 

84,700

ne!5

52,200 

51,600 

51,100 

50,900 

50,400 

50,000

ne21

39,800 

39,700 

39,800 

40,000 

40,000 

40,200

Supplemental record.- May 28, 

12.61 ft., 50,900 sec.-ft.

10 a.m., 19.93 ft., 122,000 sec.-ft.; June 17, 2 a.m.,
KOOTENAI RIVER BASIN 59

Kootenal River at Leonia, Idaho

Location.- Lat. 48°37', long. 116°03', in SW£ sec. 17, T. 33 N., R. 34 W., at Leonia, 

450 feet east of Montana-Idaho State line and half a mile upstream from Boulder 

Su dt } 8a8e ±S 1 ' 700 ' 00 feet above mean sea level (U. S. Coast and Geodetic

Drainage area.- il,740 square miles.

gage-height record.- Water-stage recorder graph.

Dl33i?a^§f recopdT=~stage-dlscharge relation defined by current-meter measurements 

Shifting-control' method used May 24-29.

MaXl?ls3 40yfeet) 1948: Dlscharse ' I 23 - 000 second-feet 1:30 a.m. May 28 (elevation,

T 0 J?,28-, to. AEFU 1948: Discharge, 95,500 second-feet June 18, 1933 (elevation, l,oio.ll feet). '

Elevation known, 1,824.6 feet June 1894 (discharge not determined). 

Remarks.- No diversion or regulation above station.

Elevation,* in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

33,400

32,000

29,400

28,000

26,900

25,900

27,400

30,000

32,800

32,100

June

93,600

88,600

86,800

86,800

87,300

86,800

85,8001

85,100

84,800

85,900

July

36,800

36,200

33,900

30,700

28,600

27,000

26,200

25,800

24,500

23,100

Day

11

12

13

14

15

16

17

18

19

20

May

30,300

29,300

30,900

33,200

33,000

32,000

33,800

38,400

48,500

62,600

June

84,600

83,400

75,200

65,200

60,300

59,100

59,900

58,300

53,900

49,300

July

21,700

20,800

20,500

20,800

20,900

19,900

19,200

18,800

18,400

18,800

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches............................................................................................................................

May

75,300

82,200

96,700

107,000

113,000

117,000

120,000

122,000

119,000

113,000

103,000

5.82

June

47,800

47,600

47,000

48,100

48,700

46,800

43,600

41,100

39,100

37,800

6.24

July

18,900

18,600

18,200

17,800

17,500

17,300

16,500

16,300

17,600

19,000

19,800

22,260

2.19

Elevation,* in feet, and discharge, in second-feet, at indicated time, 1948

K

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

vatioJ DischarKe

May 17

9.51 

9.62 

9.75 

9.85 

9.96 

10.15

Mi

18.90 

19.26 

19.66 

20.00 

20.24 

20.45

Mi

22.99 

22.86 

22.75 

22.66 

22.61 

22.52

Ju

18.20 

18.19 

18.12 

18.13 

18.16 

18.22

32,800 

33,300 

33,900 

34,300 

34,800 

35,600

y23

91,900 

94,400 

97,200 

99,600 

101,000 

103,000

»y29

121,000 

120,000 

119,000 

118,000 

118,000 

117,000

ne4

87,000 

86,900 

86,400 

86,500 

86,700 

87,100

June 10

18.08 

18.11 

18.10 

18.04 

17.97 

17.88

Ju

14.09 

14.09 

14.07 

14.11 

14.16 

14.23

86,200 

86,400 

86,300 

85,900 

85,400 

84,800

nel6

58,900 

58,900 

58,800 

59,100 

59,400 

59,800

vat!onHhar*e

May 18

10.31 

10.50 

10.70 

10.86 

11.11 

11.45

36,400 

37,300 

38,300 

39,100 

40,600 

' 42,400

May 24

20.94 

21.31 

21.69

M

22.34 

22.13 

21.92 

21.68 

21.51 

21.28

Ju

18.23 

18.23 

18.23 

18.23 

18.28 

18.29

105,000 

108,000 

111,000

»y30

116,000 

115,000 

113,000 

112,000 

110,000 

109,000

ne5

87,200 

87,200 

87,200 

87,200 

87,600 

87,600

June 11

17.86 

17.86 

17.84 

17.83 

17.85 

17.88J

84,600 

84,600 

84,500 

84,400 

84,600 

84,800

June 17

14.35 

14.33 

14.24 

14.20 

14.18 

14.15

60,600 

60,500 

59,900 

59,600 

59,500 

59,300

vatioij Di**""*6

May 19

11.79 

12.10 

12.39 

12.75 

13.24 

13.68

44,300 

46,100 

47,900 

50,200 

53,400 

56,300

May 25

21.81 

21.99 

21.88 

21.96 

22.17 

22.34

Mi

21.01 

20.72 

20.40 

20.12 

19.94 

19.75

112,000 

113,000 

112,000 

113,000 

114,000 

116,000

iy31

107,000 

105,000 

102,000 

100,000 

99,200 

97,800

June 6

18.25 

18.18 

18.13 

18.11 

18.16 

18.17

87,400 

86,900 

86,500 

86,400 

86,700 

86,800

June 12

17.88 

17.80 

17.72 

17.59 

17.50 

17.35

84,800 

84,200 

83,600 

82,700 

82,100 

81,000

June 18

14.14 

14.11 

14.02 

13.93 

13.82 

13.71

59,200 

59,100 

58,400 

57,900 

57,100 

56,500

.atl^l 018'*^

May 20

14.34 

14.87 

15.77

60,500 

64,000 

70,100

May 26

22.44 

22.48 

22.48 

22.52 

22.67 

22.79

Ju

19.53 

19.30 

19.07 

18.89 

18.80 

18.72

Ju

18.12 

18.06 

17.98 

17.94 

18.01 

18.02

116,000 

117,000 

117,000 

117,000 

118,000 

119,000

me 1

96,300 

94,700 

93,100 

91,800 

91,200 

90,600

ne7

86,400 

86,000 

85,500 

85,200 

85,700 

85,700

June 13

17.13 

16.86 

16.54 

16.16 

15.86 

15.61

79,500 

77,600 

75,400 

72,800 

70,700 

69,100

June 19

13.60 

13.45 

13.31 

13.16 

13.03 

12.90

55,700 

54,800 

53,900 

52,900 

52,000 

51,200

filevatlon Discharge

May 21

16.39 

16.59 

16.60 

16.57 

16.68 

16.84

Mi

22.86 

22.90 

22.93 

23.08 

23.28 

23.38

Ju

18.63 

18.50 

18.37 

18.27 

18.31 

18.29

74,400 

75,700 

75,800 

75,600 

76,400 

77,500

y27

119,000 

119,000 

119,000 

120,000 

122,000 

123,000

ne2

90~, 000 

89,100 

88,200 

87,500 

87,800 

87,600

June 8

17.99 

17.94 

17.87 

17.85 

17.91 

17.91

85,500 

85,200 

84,700 

84,600 

85,000 

85,000

June 14

15.42 

15.24 

15.02 

14.81 

14.70 

14.60

Ju

12.79 

12.69 

12.58 

12.48 

12.43 

12.43

67,700 

66,500 

65,000 

63,700 

62,900 

62,200

ne20

50,400 

49,800 

49,200 

48,500 

48,200 

48,200

Elevation

Mi

17.07 

17.27 

17.39 

17.64 

18.03 

18.51

Discharge

»y22

79,100 

80,500 

81,300 

83,100 

85,800 

89,200

May 28

23.39 

23.34 

23.29 

23.19 

23.16 

23.09

Ju

18.25 

18.19 

18.12 

18.10 

18.14 

18.19

Ju

17.92 

17.89 

17.85 

17.85 

17.84 

17.93

Ju

14.46 

14.37 

14.28 

14.20 

14.17 

14.12

123,000 

123,000 

122,000 

122,000 

121,000 

121,000

ne3

87,400 

86,900 

86,400 

86,300 

86,600 

86,900

ne9

85,000 

84,800 

84,600 

84,600 

84,500 

85,100

ne 15

61,300 

60,700 

60,200 

59,600 

59,400 

59,100

June 21

12.40 

12.37 

12.32 

12.32 

12.36 

12.42

48,200 

47,800 

47,500 

47,500 

47,800 

48,100

Supplemental record.- May 28, 1:30 a.m., 23.40 ft., 123,000 sec.-ft. 

* Add 1,800.00 feet to obtain elevation above mean sea level.
60 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Kootenal River at Boom Camp, near Bonners Ferry, Idaho

Location.- Lat. 48°42'05 n , long. 1160 14'30", in NW£ sec. 29, T. 62 N., R. 2 E., 600 fe-Jt 

feet east of Boom Camp, 3j miles upstream from Bonners Ferry, and 4 miles downstream 

from Moyle River. Datum of gage is 1,700.00 feet above mean sea level (U, S. Coast 

and Geodetic Survey datum).

Qage-helght record.- Water-stage recorder graph.

Maxima.- May-June 1948; Elevation, 1,779.87 feet 8 p.m. May 28.

 T927 to April 1948: Elevation recorded, 1,776.58 feet June 18, 1933.

Remarks.- Elevations affected by backwater from Kootenay Lake May 19 to July 10.

Mean elevation*, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

64.93

64.77

64.26

63.99

63.75

63.56

63.85

64.34

64.90

64.86

June

77.90

77.15

76.75

76.60

76.54

76.45

76.30

76.14

76.05

76.12

July

66.59

66.32

65.88

65.24

64.66

64.19

63.91

63.74

63.43

63.10

Day

11

12

13

14

15

16

17

18

19

20

May

64.54

64.34

64.74

65.18

65.13

64.96

65.31

66.05

67.60

70.31

June

76.03

75.94

75.28

73.97

72.96

72.36

72.17

71.81

71.21

70.44

July

62.77

62.56

62.45

62.48

62.54

62.35

62.19

62.07

61.99

62.09

Day

21

22

23

24

25

26

27

28

29

30

31

May

73.44

75.24

76.98

78.24

78.80

78.46

79.31

79.59

79.66

79.34

78.77

June

69.88

69.58

69.27

69.21

69.20

68'. 92

68.39

67.85

67.35

66.94

July

62.10

62. 0*

61.9?

61.73

61.73

61.7:

61.51

61.47

61.7i3

62.11

62.29

* Add 1,700 feet to obtain elevation above mean sea level.

Elevation*, in feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Elevation Discharge

May 17

65.13 

65.23 

65.33 

65.41 

65.49 

65.61

May 23

76.70 

76.78 

77.00 

77.17 

77.19 

77.65

M

79.69 

79.69 

79.70 

79.64 

79.59 

79.54

Ju

76.62 

76.56 

76.55

*y29

ne4

June 10

76.14 

76.16 

76.10

June 16

72.39 

72.28 

72.25

T|£-J Discharge

May 18

65.74 

65.88 

66.04 

66.16 

66.29 

66.57

May 24

77.62 

77.84 

78.50 

78.62 

78.59 

78.50

May 30

79,46 

79.28 

79.10

Ju

76.55 

76.51 

76.53

ne5

June 11

76.03 

76.00 

76.01

June 17

72.26 

72.13 

72.00

Elevation Discharge

May 19

66.88 

67.19 

67.54 

67.94 

68.27 

68.74

May 25

78.34 

78.72 

79.04 

79.28 

78.89 

78.55

Ms

78.92 

78.66 

78.36

iy31

June 6

76.50 

76.40 

76.39

June 12

76.01 

75.91 

75.76

June 18

71.88 

71.74 

71.56

vltfoJ 019611^6

May 20

69.25 

69.74 

70.23 

70.74 

71.46 

72.18

May 26

78.39 

78.30 

78.30 

78.45 

78.70 

79.02

Ju

78.06 

77.72 

77.46

Ju

76.35 

76.25 

76.22

ne 1

ne7

June 13

75.51 

75.10 

74.58

June 19

71.34 

71.11 

70.81

vat?oJ Discha^

May 21

72.84 

73.32 

73.59 

73.76 

73.92 

74.15

May 27

79.34 

79.62 

79.74 

79.42 

78.82 

78.85

Ju

77.25 

77.04 

76.89

ne2

JuneS

76.19 

76.10 

76.09

June 14

74.17 

73.77 

73.39

Ju

70.54 

70.30 

70.12

ne20

Elevatl nn

Me

74.41 

74.85 

75.14 

75.42 

75.77 

76.34

Discharge

iy22

May 28

79.22 

79.50 

79.72 

79.81 

79.87 

79.79

Ju

76.79 

76.68 

76.64

Ju

76.07 

76.00 

76.04

ne3

ne9

June 15

73.09 

72.80 

72.57

June 21

69.94 

69.84 

69.71

Supplemental record.- May 24, 1:30 a.m., 77.82 ft., 6:15 a.m., 77.52 ft.

* Add 1,700 feet to obtain elevation above mean sea level.
KOOTENAI RIVER BASIN 61

Kootenai River at Bonners Ferry, Idaho

Location.- Lat. 48°42'00", long. 116°18'45", In NE£ sec. 27, T. 62 N., R. 1 E., on 

highway bridge at Bonners Ferry. Datum of gage Is 1,743.00 feet above mean sea 

level (U. S. Coast & Geodetic Survey datum). (See pi. 8, 9A.)

Drainage area.- 13,000 square miles.

Gage-height "record.- Water-stage recorder graph.

Discharge record.- Stage-fall-dlscharge relation defined by current-meter measurements below 120,000 second-feet and extended to peak discharge. Backwater effect 

from Kootenay Lake usually present at Bonners Perry. Discharge for periods of 

backwater at Boom Camp from Kootenay Lake, May 19 to July 10, computed on basis 

of fall between gages at Boom Camp and near Bonners Ferry; discharge for remainder 

of period computed on basis of stage-discharge relation for station at Boom Camp. 

Discharge measurements made at station near Bonners Perry.

Maxima.- May-June 1948: Discharge, 139,000 second-feet 6 p.m. May 27, affected by 

dike breakages downstream; elevation, 1,778.32 feet 7 p.m. May 28.

1927 to April 1948: Discharge, 99,800 second-feet June 18, 1933; elevation, 

1,774.98 feet June 19, 1933.

Flood In June 1894 reached an elevation of 1,777.2 feet.

Remarks.- No diversion or regulation above station.

Mean elevation*, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

57.58

57.82

57.10

56.53

56.13

55.66

56.04

57.02

58.25

58.44

June

76.40

77.47

74.92

74.69

74.57

74.47

74.30

74.14

73.99

74.03

July

63.74

63.29

62.73

61.99

61.14

60.33

59.73

59.17

58.53

57.77

Day

11

12

13

14

15

16

17

18

19

20

May

57.99

57.62

58.20

59.15

59.29

59.05

59.58

60.77

63.00

66.70

June

73.97

73.89

73.34

72.21

71.19

70.55

70.21

69.89

69.32

68.54

July

57.01

56.32

55.65

55.28

55.10

54.65

54.14

53.74

53.44

53.42

Day

21

22

23

24

25

26

27

28

29

30

31

May

70.53

72.57

74.26

75.99

76.51

75.77

77". 29

77.88

78.10

77.83

77.34

June

67.93

67.54

67.12

66.91

66.78

66.53

66.04

65.41

64.81

64.24

-

July

53.34

53.17

52.88

52.64

52.44

52.31

51.95

51.78

52.08

52.51

52.85

*Add 1,700 feet to obtain elevation above sea level.

Mean discharge, in seconds-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

36,600

35,600

32,500

30,900

29,500

28,400

30,100

33,000

36,400

36,200

June

104,000

97,400

94,500

93,900

93,900

93,500

91,900

90,200

89,500

90,800

July

38,600

37,900

35,800

32,700

30,100

28,200

27,100

26,400

25,000

23,400

Day

11

1!?

13

14

15

16

17

18

19

20

May

34,200

33,000

35,400

38,200

37,800

36,800

39,000

43,600

49,400

65,300

June

89,500

88,600

80,700

69,000

63,200

61,200

61,800

59,400

56,200

52,100

July

22,800

21,800

21,200

21,400

21,700

20,800

20,000

19 , 500

19,100

19,500

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .................. .. .. ... . ... .... .......... .

Runoff, in inches ............................................................................................................................

May

81,300

87,800

103,000

111,000

121,000

123,000

128,000

130,000

130,000

123,000

112,000

64,260

5.70

June

50,500

50,000

48,900

49,700

50,300

48,700

45,600

43,200

41,200

39,900

-

69,640

5.98

July

19,600

19,300

18,800

18,200

17,900

17,800

17,000

16,800

18,100

19,600

20,500

23,120

2.05
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Kootenai River at Bonners Perry, Idaho--Continued 

Elevation*, in feet, and discharge, in second-feet, at indicated time, 1948

s-t 

3

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Elevation Discharge

May 17

59.21 

59.38 

59.57 

59.72 

59.88 

60.07

37,800 

38,500 

39,100 

39,600 

40,100 

40,900

May 23

74.13 

74.10 

74.28 

74.24 

74.19 

75.08

98,700 

101,000 

103,000 

108,000 

106,000 

105,000

May 29

78.05 

78.14 

78.16 

78.10 

78.04 

78.01

131,000 

130,000 

130,000 

129,000 

128,000 

127,000

June 4

74.72 

74.65 

74.61

94,200 

93,600 

93,900

June 10

74.02 

74.07 

74.03

91,200 

91,300 

90,400

June 16

70.62 

70.46 

70.34

61,000 

61,000 

61,600

vf tlorj Discharge

May 18

60.28 

60.50 

60.70 

60.98 

61.25 

61.66

41,700 

42,600 

43,700 

44,500 

45,300 

47,200

May 24

75.14 

75.55 

76.15 

76.50 

76.73 

76.56

107,000 

108,000 

115,000 

113,000 

111,000 

113,000

May 30

77.96 

77.76 

77.62

125,000 

122,000 

118,000

June 5

74.59 

74.56 

74.52

94,100 

93,700 

94,300

June 11

73.98 

73.93 

73.93

89,300 

89,200 

89,500

June 17

70.28 

70.18 

70.05

62,400 

61,600 

60,800

Elevation Discharge

May 19

62.14 

62.57 

62.93 

63.37 

63.95 

64.64

45,000 

46,900 

49,000 

51,800 

53,800 

56,600

May 25

76.04 

76.41 

76.87 

77.42 

76.24 

75.74

116,000 

117,000 

118,000 

124,000 

132,000 

128,000

May 31

77.48 

77.26 

76.92

114,000 

110,000 

108,000

June 6

74.49 

74.43 

74.38

94,200 

92,700 

92,900

June 12

73.93 

73.87 

73.72

89,600 

88,200 

86,400

June 18

69.95 

69.85 

69.66

60,100 

59,000 

57,800

EJe " 1 Discharge 

vat ion!

May 20

65.32 

65.97 

66.44 

67.13 

67.96 

68.83

59,600 

62,200 

64,700 

67,400 

71,900 

75,600

May 26

75.43 

75.31 

75.41 

75.83 

76.49 

77.09

r 127, 000 

126,000 

123,000 

121,000 

120,000 

119,000

June 1

76.57 

76.23 

75.84

105,000 

102,000 

99,900

June?

74.34 

74.25 

74.21

92,500 

91,200 

91,000

June 13

73.51 

73.23 

72.80

83,400 

78,800 

73,300

June 19

69.46 

69.21 

68.93

56,900 

56,000 

53,900

Elevation

M;

69.65 

70.24 

70.51 

70.83 

71.10 

71.44

Discharge

iy21

79,400 

81,500 

82,300 

82,500 

82,500 

83,300

May 27

77.62 

78.09 

78.00 

77.11 

76.05 

76.77

120,000 

124,000 

130,000 

136,000 

137,000 

127,000

June 2

75.56 

75.35 

75.14

98,200 

96,300 

95,200

June 8

74.16 

74.12 

74.05

90,900 

89,300 

89,900

June 14

72.41 

72.03 

71.66

70,300 

67,400 

65,100

June 20

68.65 

68.43 

68.21

52,500 

51,400 

51,100

vg^J Discharge

May 22

71.81 

72.22 

72.52 

72.95 

73.42 

73.97

84,400 

87,500 

88,300 

88,600 

89,700 

93,600

May 28

77.31 

77.70 

78.12 

78.26 

78.31 

78.19

128,000 

129,000 

130,000 

131,000 

132,000 

133,000

June 3

74.98 

74.83 

74.74

94,800 

93,900 

94,200

June 9

74.01 

73.96 

73.97

89,900 

88,900 

89,600

June 15

71.34 

71.02 

70.75

64,000 

62,300 

61,600

June 21

68.02 

67.83 

67.68

50,200 

50,600 

50,100

Supplemental record.- May 23, 2 a.m., 74.21 ft., 2 p.m., 74.33 ft., 6 p.m., 74.12 

.; May 24, 1 a.m., 75.32 ft., 6 a.m., 75.96 ft.

* Add 1,700 feet to obtain elevation above mean sea level.
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 8

A. BREAK IN DIKE ALONG KOOTENAI RIVER IN IDAHO THROUGH WHICH RECLAMATION

DISTRICT NO. 5 WAS FLOODED. 

Courtesy of R. B. McComb, United States Weather Bureau.

B. BREAK IN DIKE ALONG KOOTENAI RIVER NEAR BONNERS FERRY. 

Courtesy of United States Forest Service.

GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 9

A. BONNERS FERRY, IDAHO, FLOODED BY KOOTENAI RIVER. 

Courtesy of R. B. McComb, United States Weather Bureau.

B. BRIDGE OF THE UNITED STATES FOREST SERVICE OVER LONG CANYON CREEK NEAR

PORTHILL, IDAHO.

KOOTENAI RIVER BASIN 63

Kootenai River near Bonners Perry, Idaho

Location^- Lat. 48°41'55 n , long. 116°20'40", in NWfc sec. 28, T. 62 N., R. 1 E., 1.6

 miles~downstream from highway bridge at Bonners Perry. Datum of gage is 1,700.00

feet above mean sea level (U. S. Coast and Qeodetic Survey datum). 

Drainage area.- 13,000 square miles. 

Gage-height record.- Water-stage recorder graph. 

Maxima.- May-June 1948; Elevation, 1,776.84 feet 6:30 p.m. May 28.

 T928 to April 1948: Elevation, 1,774.17 feet June 20, 1933. 

Remarks.- Elevations affected by backwater from Kootenay Lake.

Mean elevation*, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

56.83

57.21

56.52

55.95

55.57

55.13

55.47

56.37

57.59

57.85

June

75.35

74.54

74.06

73.83

73.81

73.61

73.47

73.30

73.19

73.23

July

63.40

62.92

62.42

61.69

60.90

60.14

59.54

58.94

58.27

57.63

Day

11

12

13

14

15

16

17

18

19

20

May

57.42

57.05

57.61

58.55

58.72

58.47

58.94

60.12

62.24

65.65

June

73.17

73.08

72.60

71.62

70.68

70.02

69.69

69.38

68.80

68.11

July

56.76

56.08

55.40

55.02

54.84

54.38

53.87

53.47

53.16

53.12

Day

21

22

23

24

25

26

27

28

29

30

31

May

69.58

71.78

73.24

75.03

75.25

74.44

75.81

76.46

76.65

76.53

76.26

June

67.48

67.04

66.67

66.46

66.34

66.10

65.65

65.07

64.48

63.89

July

53.04

52,87

52.61

52.33

52.17

52.02

51.68

51.44

51.70

52.14

52.40

* Add 1,700 feet to obtain elevation above mean sea level.

Elevation*, in feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

.atio'nl Discharge

May 17

58.60 

58.76 

58.93 

59.10 

59.26 

59.43

May 23

73.18 

73.12 

73.28 

73.01 

73.22 

74.07

Ms

76.61 

76.71 

76.72 

76.66 

76.60 

76.58

Ju

73.86 

73.80 

73.76

iy29

ne4

June 10

73.22 

73.26 

73.22

June 16

70.08 

69.92 

69.81

vatiod Dischar*e

May 18

59.63 

59.86 

60.14 

60.34 

60.55 

60.90

May 24

74.23 

74.62 

75.23 

75.63 

75.73 

75.44

May 30

76.58 

76.49 

76.44

June5

73.74 

73.70 

73.68

June 11

73.18 

73.14 

73.14

June 17

69.75 

69.64 

69.53

vatloJ Discharge

May 19

61.38 

61.80 

62.24 

62.62 

63.07 

63.68

May 25

74.83 

75.52 

76.06 

76.08 

74.48 

74.16

Ms

76.36 

76.16 

75.84

iy31

June 6

73.64 

73.58 

73.55

June 12

73.13 

73.07 

72.96

June 18

69.43 

69.33 

69.19

£11^ Discharge

May 20

64.32 

65.01 

65.67 

66.30 

67.02 

67.90

May 26

73,83 

73.77 

74.12 

74.63 

75,25 

75.97

June 1

75.52 

75.18 

74.87

Jt

73.50 

73.43 

73.40

ne 7

June 13

72.78 

72.50 

72.15

June 19

68.95 

68.71 

68.48

vationK1^

' May 21

68.73 

69.37 

69.76 

70.04 

70.32 

70.62

May 27

76.44 

76.70 

76.45 

75.28 

74.33 

75.35

June 2

74.64 

74.43 

74.25

Ju

73.34 

73.28 

73.24

ne8

June 14

71.79 

71.45 

71.12

Ju

68.23 

67.99 

67.76

ne 20

,at!;J Discha^

May 22

70.94 

71.33 

71.72 

72.13 

72.57 

73.08

May 28

75.98 

76.43 

76.70 

76.82 

76.83 

76.69

Ju

74.12 

73.99 

73.90

ne3

June 9

73.21 

73.17 

73.18

June 15

70.79 

70.53 

70.27

June 21

67.58 

67.38 

67.23

Supplemental record.- May 

7 p.m., 74.17 ft.; May 28, 6

23, 2 a.m., 73.33 ft.j May 25, 

:30 p.m., 76.84.

2 p.m., 76.24 f t. ; May 27,

Add 1,700 feet to obtain elevation above mean sea level.
64 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Kootenal River at Klockmann Ranch, near Bonnera Ferry, Idaho

Location.- Lat. 48°47'40", long. 116°22'50", In SE£ sec. 19, T. 63 N., R. 1 E., at 

Klockmann Ranch, 800 feet south of viaduct on Kootenal Valley branch of Great 

Northern Railway and 8 miles north of Bonners Ferry. Datum of gage Is 1,700.00 

feet above mean sea level (U. S. Coast and Geodetic Survey datum).

Gage-height record.- Water-stage recorder graph except period 2 p.m. July 9 to 9 a.m. 

July 12, for which mean elevations were computed on basis of records for other 

stations on Kootenal River.

Maxima.- May-June 1948: Elevation, 1,773.82 feet 8 p.m. May 28.

1928 to April 1948: Elevation, 1,771.24 feet June 20, 1933.

Remarks.- Elevations affected by backwater from Kootenay Lake.

Mean elevation*, In feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

54.75

55.15

54.56

54.03

53.67

53.24

53.52

54.35

55.52

55.79

June

72.74

72.12

71.71

71.50

71.37

71.27

71.18

71.05

70.93

70.92

July

62.02

61.52

61.05

60.44

59.66

58.94

58.34

57.75

57.00

56.40

Day

11

12

13

14

15

16

17

18

19

20

May

55.46

55.12

55.56

56.49

56.69

56.48

56.86

57.95

59.85

62.97

June

70.92

70.88

70.58

69.85

69.08'

68.48

68.14

67.81

67.38

66.79

July

55.50

54.88

54.25

53.84

53.62

53.16

52.68

52.28

51.97

51.89

Day

21

22

23

24

25

26

27

28

29

30

31

May

66.41

68.46

69.96

71.42

71.43

70.86

72.46

73.22

73.50

73.58

73.48

June

66.11

65.57

65.18

64.90

64.74

64.50

64.11

63.57

63.05

62.53

July

51.80

51.63

51.39

51.14

50.95

50.79

50.50

50.29

50.42

50.74

51.00

Add 1,700 feet to obtain elevation above mean sea level.

Elevation*, In feet, at Indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Elevation Discharge

May 17

56.55 

56.70 

56.85 

57.00 

57.17 

57.30

May 23

69.93 

69.91 

70.08 

69.86 

69.85 

70.52

May 29

73.56 

73.61 

73.50 

73.36 

73.37 

73.52

June 4

71.53 

71.48 

71.42

June 10

70.92 

70.95 

70.94

June 16

68.54 

68.40 

68.27'

vat!ou! Di"h^

May 18

57.50 

57.70 

57.95 

58.16 

58.38 

58.70

May 24

71.03 

71.17 

71.55 

71.99 

71.90 

71.13

May 30

73.61 

73.60 

73.52 

73.53 

73.60 

73.66

June 5

71.38 

71.34 

71.32

June 11

70.92 

70.92 

70.92

June 17

68.19 

68.09 

67.96

v!teion| Discharge

May 19

59.05 

59.42 

59.77 

60.28 

60.72 

61.21

Ms

70.50 

71.57 

72.08 

72.28 

71.18 

70.83

Ms

73.64 

73.40 

73.14

Ju

71.30 

71.25 

71.22

iy25

iy31

me 6

June 12

70.90 

70.85 

70.79

June 18

67.87 

67.75 

67.62

^-jDischarse

May 20

61.77 

62.39 

62.95 

63.53 

64.15 

64.81

May 26

70.51 

70.41 

70.56 

70.90 

71.38 

71.94

June 1

72.87 

72.60 

72.38

Ju

71.20 

71.16 

71.12

ne7

June 13

70.69 

70.52 

70.26

June 19

67.46 

67.29 

67.12

EJ?~J Discharge vatlon! B

May 21

65.48 

66.15 

66.60 

66.92 

67.15 

67.42

May 27

72.43 

72.84 

73.14 

72.73 

71.67 

72.18

Ju

72.20 

72.04 

71.88

Ju

71.09 

71.04 

70.99

ne2

ne8

June 14

70.00 

69.72 

69.45

June 20

66.90 

66.69 

66.44

Elevation Discharge

May 22

67.69 

68.02 

68.40 

68.80 

69.24 

69.67

May 28

72.62 

73.02 

73.41 

73.71 

73.82 

73.68

June 3

71.75 

71.67 

71.58

Ju

70.94 

70.90 

70.90

ne9

June 15

69.20 

68.95 

68.71

June 21

66.23 

66.00 

65.77

Supplemental record.- May 

70.32 ft., 3 p.m. , 72.32 ft

24, 5 a.m., 70.88 ft., 6 p.m., 71 

; May 27, 1 p.m., 73.16 ft.

02 ft,; May 25, 3 a.m.

* Add 1,700 feet to obtain elevation above mean sea level.
KOOTENAI RIVER BASIN

Kootenal River near Copeland, Idaho 

(international gaging station)

Legation.- Lat. 48°54'45", long. 116°25'00", in NW£NW£SW£ sec. 12, T. 64 N., R. 1 W., 

at Andrews Ranch, three-quarters of a mile downstream from Mission Creek and l£ 

miles northwest of Copeland. Datum of gage is 1,700.00 feet above mean sea level 

(U. S. Coast and Geodetic Survey datum).

Drainage area.- 13,400 square miles.

Gage-height record.- Water-stage recorder graph except July 16, 17, when elevation 

was determined on basis of records for other stations on Kootenai River.

Discharge record.- Discharge for flood period not available for this report.

Maxima.- May-June 1948: Elevation, 1,770.10 feet 5 a.m. May 31.

1929 to April 1948: Daily discharge, 90,500 second-feet June 19, 1933; elevation, 1,767.98 feet June 20, 1933.

Remarks.- Stage-discharge relation affected by backwater from Kootenay Lake. This 

station is one of the international gaging stations maintained by the United States 

under agreement with Canada.

Gage height, in feet, 1948

Day

1

2

3

4

5

6

7

8

10

May

51.76

52.26

51.88

51.45

51.16

50.83

51.01

51.70

52.65

53.00

June

68.93

68.59

68.25

68.03

67.92

67.86

67.80

67.72

67.63

67.62

July

59.60

59.18

58.75

58.20

57.59

56.97

56.42

55.84

55.27

54.66

Day

11

12

13

14

15

16

17

18

19

20

May

52.78

52.53

52.90

53.68

53.90

53.79

54.14

55.03

56.51

59.02

June

67.64

67.60

67.40

66.97

66.38

65.84

65.43

65.08

64.67

64.15

July

53.98

53.38

52.81

52.37

52.09

51.65

51.20

50.81

50.54

50.40

Day

21

22

23

24

25

26

27

28

29

30

31

May

62.17

64.04

65.64

66.78

67.27

67.05

69.03

69.61

68.89

69.53

69.77

June

63.58

63.10

62.71

62.39

62.15

61.87

61.53

61.08

60.52

60.06

July

50.27

50.10

49.87

49.68

49.62

49.34

49.10

48.90

48.94

49.12

49.26

Gage height, in feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

53.97 

54.25 

54.52

May 23

65.48 

65.59 

65.71 

65.75 

65.66 

65.97

M

68.77 

68.21 

69.41

Ju

68.04 

67.99

»y29

ne 4

June 10

67.62 

67.63

June 16

65.84 

65.63

Gage 

height Discharge

May 18

54.84 

55.22 

55.60

May 24

66.53 

66.67 

66.92 

66.98 

66.67 

67.24

Mi

69.54 

69.24 

69.15 

69.57 

69.95 

70.06

Ju

67.92 

67.90

Ju

67.63 

67.65

iy30

ne5

nell

June 17

65.42 

65.24

Gage 

height Discharge

May 19

56.15 

56.78 

57.56

May 25

66.64 

67.15 

67.64 

67.95 

67.21 

66.67

May 31

69.99 

69.60 

69.26

Jt

67.87 

67.83

ne6

June 12

67-. 60 

67.55

June 18

65.08 

64.88

Gage 

height Discharge

May 20

58.55 

59.53 

60.64

May 26

66.60 

66.77 

66.88 

87.17 

67.58 

68.07

Ju

68.87 

68.73

Ju

67.80 

67.77

Ju

67.42 

67.23

me 1

ne7

ne!3

June 19

64.68 

64.42

Gage 

height

M:

61.83 

62.69 

63.22

Discharge

iy21

May 27

68.33 

68.99 

69.53 

69.71 

68.97 

68.87

-

June 2

68.60 

68.37

June 8

67.72 

67.68

June 14

66.96 

66.65

Ju

64.15 

63.85

ne20

Gage 

height

M

63.71 

64.31 

65.04

Discharge

»y 22

May 28

69.46 

69.85 

70.00

JuneS

68.24 

68.11

Ju

67.63 

67.62

ne9

June 15

66.35 

66.08

June 21

63.59 

63.32

Supplemental record.- May 24, 2 p.m., 67.10 ft., 7 p.m., 66.62 ft., 11 p.m., 67.28 

ft.; May 25, 10 p.m., 66.80 ft.; May 26, 3 a.m., 66.57 ft.; May 27, 3 a.m., 68.39 ft., 

3 p.m., 69.74 ft., 10 p.m., 68.77 ft.; May 28, 1 p.m., 69.87 ft., May 29, 1 a.m., 70.07 

ft., 2 p.m., 68.06 ft.; May 30, 11 a.m., 69.11 ft.; May 31, 5 a.m., 70.10 ft.
66 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Kootenai River at Porthl'll, Idaho 

(International gaging station)

Location.- Lat. 49°00'00", long. 116°30'10", In SW£ sec. 8, T. 65 N., R. 1 W., 300 feet 

south of International boundary at Porthlll. Datum of gage Is 1,700.00 feet above 

mean sea level (U. S. Coast and Geodetic Survey datum) and 1,699.80 feet above mean 

sea level (datum of Geodetic Survey of Canada, adjustment of 1928).

Drainage area.- 13,700 square miles.

Qage-helght record.- Water-stage recorder graph except for period 5 p.m. June 9 to

2:15 p.m. June 17, for which dally mean elevations were computed on basis of recorded range In stage and records for other stations on Kootenai River.

Discharge record.- Discharge for flood period not available for this report.

Maxima.- May-June 1948: Elevation, 1,766.16 feet 1:30 a.m. May 31.

1928 to April 1348: Dally discharge, 93,200 second-feet June 19, 1933; elevation, 1,764.08 feet May 31, 1938.

Maximum elevation known, 1,772.7 feet sometime In June 1894.

Remarks.- Elevations affected by backwater from Kootenay Lake. Boundary dike of

Reclamation Farm and Forest Service roadway dike (south side of Boundary Creek) were 

breached In many places and there was flow entire width of valley. This station Is 

one of the International gaging stations maintained by the United States under 

agreement with Canada. Elevation*, In feet, 1948

Day

1

2

3

4

5

6

7

8

g

10

May

49.34

49.77

49.54

49.26

49.08

48.85

48.96

49.44

50.31

50.62

June

65.21

65.42

65.33

65.29

65.26

65.25

65.26

65.22

65.19

65.20

July

57.86

57.46

57.02

56.54

56.01

55.49

54.96

54.45

53.91

53.36

Day

11

12

13

14

15

16

17

18

19

20

May

50.52

50.39

50.73

51.33

51.51

51.47

51.81

52.52

53.72

55.82

June

65.25

65.25

65.15

64.70

64.25

63.85

63.58

63.21

62.81

62.37

July

52.81

52.25

51.74

51.33

50.99

50.63

50.21

49.81

49.54

49.35

Day

21

22

23

24

25

26

27

28

29

30

31

May

58.20

59.68

61.00

61.98

62.68

62.74

64.23

64.72

64.32

65.07

65.55

June

61.84

61.37

60.91

60.56

60.25

59.91

59.57

59.16

58.74

58.30

July

49.20

49.03

48.82

- 48.68

48.52

48.35

48.11

47.96

47.91

47.98

48.06

Elevation*, In feet, at Indicated time, 1948

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Elevation Discharge

May 17

51.59 

51.71 

51.80 

51.92 

52.03 

52.15

May 23

60.74 

60.89 

61.06 

61.21 

61.20 

61.27

M

65.07 

64.37 

63.62 

63.67 

64.15 

64.66

Jl

65.30 

65.28 

65.27

»y29

ne4

June 10

June!6

Elevation Discharge

May 18

52.24 

52.32 

52.45 

52.70 

52.84 

53.00

Mi

61.63 

61.85 

62.04 

62.22 

62.24 

62.45

M

64.88 

64.85 

64.75 

64.99 

65.55 

66.02

Ju

65.27 

65.25 

65.25

iy24

iy30

ine5

June 11

~ Ju

63.52 

63.40

ne!7

Elevation

Ma

53.20 

53.46 

53.70 

53.98 

54.29 

54.65

Discharge

y!9

May 25

62.41 

62.33 

62.68 

62.98 

63.01 

62.60

Mi

65.90 

65.65 

65.47 

65.34 

65.27 

65.21

iy31

June 6

65.25 

65.24 

65.26

June 12

June 18

63.27 

63.15 

63.03

EJe~ 1 Discharge vatiori

May 20

55.02 

55.40 

55.77 

56.22 

56.67 

57.14

May 26

62.50 

62.57 

62.62 

62.74 

63.00 

63.37

Junel

65.17 

65.13 

65.12 

65.19 

65.30 

65.40

Ju

65.27 

65.25 

65.25

ne7

June 13

June 19

62.89 

62.76 

62.61

vatioJ Discharge

May 21

57.54 

57.89 

58.25 

58.57 

58.85 

59^05

May 27

63.72 

64.04 

64.38 

64.65 

64.63 

64.40

Ju

65.46 

65.41 

65.38

Ju

65.24 

65.20 

65.20

ne2

ne8

June 14

June 20

62.47 

62.27 

62.11

E?; e~ I Discharge nation)

May 22

59.20 

59.41 

59.62 

59.89 

60.19 

60.46

May 28

64.50 

64.64 

64.76 

64.89 

64.90 

65.00

Ju

65.34 

65.30 

65.30

Jl

65.19 

65.15

ne3

ne9

June 15

June 21

61.93 

61.76 

61.59

Supplemental record.- May 25, 2 a.m., 62.55 ft., 6 a.m., 

ft.; May 27, 6 p.m., 64.73 ft.; May 29, 2:30 a.m., 65.16 ft. 

1:30 a.m., 66.16 ft.

62.30 ft., 6 p.m., 63.10

, 2 p.m., 63.57 ft.; May 31,

* Add 1,700.00 feet to obtain elevation above mean sea level.
KOOTENAI RXVER BASIN 67

Kootenay Lake at Kuskonook, British Columbia 

(international gaging station)

Location.- Lat. 49°17'57", long. 116°40'24", at Kuskonook Hotel on east shore of lake. 

Datum of gage is 1,735.00 feet above mean sea level, datum of Geodetic. Survey of 

Canada, adjustment of 1928. Elevations given herein are to U. S. Coast and Geodetic 

Survey datum, which is 0.20 foot lower than Canadian datum as determined at Porthill, Idaho.

Qage-height record.- Water-stage recorder graph, except May 10, 11, when elevations 

were computed on basis of unpublished records for gage at Queens Bay.

Maxima.- May-June 1948: Elevation, 1,761.25 feet June 11.

 1936 to April 1948: Elevation, 1,758.79 feet June 7, 1938.

Remarks.- This station is one of the international gaging stations maintained by Canada 

under agreement with the United States.

Mean elevation,* in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

44.16

44.40

44.59

44.75

44.85

44.88

44.93

45.01

45.13

45.29

June

58.54

59.03

59.57

60.01

60.38

60.66

60.88

60.97

61.02

61.18

July

54.63

53.67

53.25

52.85

52.51

52.20

51.83

51.47

51.08

50.68

Day

11

12

13

14

15

16

17

18

19

20

May

45.47

45.60

45.76

45.96

46.16

46.33

46.56

46.86

47.15

47.65

June

61.22

61.22

61.10

60.90

60.57

60.19

59.81

59.34

58.86

58.42

July

50.30

49.91

49.58

49.18

48.83

48.49

48.18

47.87

47.62

47.40

Day

21

22

23

24

25

26

27

28

29

30

31

May

48.51

49.57

50.68

51.90

53.03

54.05

55.06

56.15

56.92

57.50

58.06

June

58.00

57.58

57.12

56.72

56.31

55.90

55.49

55.09

54.72

54.38

July

47.26

47.11

47.00

46.91

46.77

46.60

46.42

46.25

46.11

45.97

45.80

Elevation,* in feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

vationl Dischanre

May 17

46.49 

46.52 

46.53 

46.59 

46.63 

46.68

May 23

50.29 

50.51 

50.70 

50.88 

51.08 

51.28

M

56.75 

56.87 

56.99 

57.08 

57.17 

57.27

Ju

59.88 

59.96 

60.03 

60.09 

60.15 

60.22

»y29

ne4

June 10

61.09 

61.11 

61.19 

61.20 

61.22 

61.24

Ju

60.32 

60.24 

60.21 

60.14 

60.08 

60.02

ne!6

vatforJ 0-1^

May 18

46.75 

46.80 

46.83 

46.88 

46.94 

46.98

ME

51.48 

51.68 

51.90 

52.10 

52.29 

52.50

M

57.34 

57.43 

57.49 

57.57 

57.65 

57.77

Ju

60.28 

60.34 

60.36 

60.40 

60.47 

60.56

iy24

iy30

ne5

June 11

61.25 

61.22 

61.22 

61.21 

61.22 

61.24

June 17

59.96 

59.88 

59.79 

59.72 

59.65 

59.59

VE^J Discharge

May 19

47.03 

47.10 

47.15 

47.20 

47.28 

47.37

May 25

52.70 

52.88 

53.03 

53.20 

53.38 

53.57

May 31

57.88 

57.95 

58.10 

58.15 

58.24 

58.30

Ji

60.60 

60.64 

60.65 

60.69 

60.73 

60.78

ne 6

June 12

61.24 

61.23 

61.22 

61.20 

61.19 

61.18

June 18

59.52 

59.45 

59.34 

59.24 

59.18 

59.10

EJ;?~ [Discharge vationl

May 20

47.46 

47.55 

47.66 

47.71 

47.90 

48.05

May 26

53.76 

53.93 

54.07 

54.22 

54.37 

54.54

Ju

58.40 

58.48 

58.54 

58.60 

58.70 

58.80

Ju

60.82 

60.85 

60.88 

60.90 

60.93 

60.97

ne 1

ne7

June 13

61.17 

61.14 

61.10 

61.06 

61.04 

61.01

June 19

59.04 

58.95 

58.86 

58.77 

58.68 

58.64

^on! 01"*"*8

May 21

48.20 

48.36 

48.51 

48.66 

48.87 

49.08

-

May 27

54.70 

54.88 

55.06 

55.21 

55.41 

55.62

June 2

58.85 

58.94 

59.04 

59.12 

59.22 

59.32

Ju

60.97 

60.97 

60.97 

60.96 

60.97 

61.01

ne8

June 14

60.98 

60.93 

60.87 

60.83 

60.78 

60.74

June 20

58.58 

58.50 

58.42 

58.36 

58.29 

58.19

va^oJ 0'**^

May 22

49.33 

49.42 

49.58 

49.73 

49.92 

50.09

May 28

55.84 

56.00 

56.15 

56.30 

56.46 

56.62

Ju

59.41 

59.50 

59.56 

59.63 

59.71 

59.79

ne3

June 9

61.01 

61.00 

61.00 

60.96 

61.00 

61.04

June 15

60.70 

60.66 

60.58 

60.50 

60.46 

60.36

Ju

58.13 

58.08 

58.03 

57.95 

57.87 

57.82

ne21

Add 1,700 feet to obtain elevation above mean level.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Fortlne Creek near Trego, Mont.

Location.- Lat. 48°39', long. 114°55', In NE^NEi sec. 11, T. 33 N., R. 26 W., a quarter

of a mile upstream from Edna Creek, 1 mile downstream from Stewart Creek, and 5?

miles southyest of Trego. 

Drainage area.- Ill square miles.

Gage -height record.- Wire-weight gage read once daily except for period May 21-24. 

Discharge.- Stage-discharge relation defined by current-meter measurements below 720

second-feet and extended to peak stage. Discharge for period of no gage-height -

 record computed on basis of floodmark and observer's notes. Gage heights used to

hundredths . 

Maxima . - May-June 1948: Discharge, 1,000 second-feet May 22 (gage height, 10.46 feet,

from floodmark) .

1946 to April 1948: Discharge, 962 second-feet Apr. 29, 1947 (gage height, 10.28

feet, from floodmark). 

Remarks . - No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

706

584

499

499

505

479

611

667

882

708

June

292

257

224

240

223

184

165

143

127

134

July

53

67

65

59

59

57

53

59

52

49

Day

11

}?,

13

14

15

16

17

18

19

20

May

569

514

551

624

521

485

540

674

744

773

June

143

169

149

143

134

119

137

150

133

113

July

47

49

47

43

46

45

42

40

51

103

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet................... . ..........................................................

Runoff, in inches ............................................................................................................................

May

800

1,000

900

800

778

682

600

514

424

398

330

624

6.48

June

116

109

106

105

116

105

116

99

88

80

147

1.47

July

83

51

47

42

40

34

35

35

105

78

65

54.9

0.57

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

8a

8a

9a

7a

lOa

9a

8a

9a

Gage 

height

May 

7.24

May 

8.42

May 

9.0Q

May 

9.22

May 

9.26

May 

8.48

May 

7.78

May 

7.00

Discharge

17 

540

18 

674

19

744

20 

773

25 

778

26 

682

27 

600

28 

514

Hour

lOa

lOa

lOa

lOa

7a

7a

7a

7a

Gage 

height

May

6.14

May 

5.88

May

5.20

Discharge

29 

424

30 

398

31 

330

June 1 

4.78 292

June 2 

4.38 257

June 3 

3.98 224

June 4 

4.18 240

June 5 

3.96 223

Hour

N

7a

8a

7a

7a

7 a

9a

lOa

Gage 

height Discharge

June 6 

3.48 184

June 7 

3.22 165

June 8 

2.92 143

June 9 

2.70 127

June 10 

2.80 134

June 11 

2.92 143

June 12 

3.28 169

June 13 

3.00 149

Hour

7a

8a

7a

7a

7a

7a

8a

7a

height ^charge

June 14 

2.92 143

June 15 

2 . 80 134

June 16 

2.58 119

June 17 

2.84 . 137

June 18 

3.02 150

June 19 

2.78 133

June 20 

2.50 113

June £1 

2.54 116
KOOTENAI RIVER BASIN bsj

Lake Creek at Troy, Mont.

Location.- Lat. 48°26'40", long. 115°52'30", in SW£ sec. 18, T. 31 N., R. 33 W., a 

quarter of a mile downstream from power plant, half a mile upstream from mouth, and 

l£ miles southeast of Troy.

Drainage area.- 211 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.-^Stage-discharge relation defined by current-meter measurements. Gage 

heights used to hundredths.

Maxima.- May-June 1948: Discharge, 3,250 second-feet 2 a.m. May 30 (gage height, 8.28

1945 to April 1948: Discharge, 2,400 second-feet May 9, 1947 (gage height, 6.48 

feet).

Mean discharge, in second-feet,

Day

1

2

3

4

5

6

7

8

9

10

May

708

682

657

675

651

657

714

798

805

786

June

2,860

2,900

2,910

2,910

2,800

2,710

2,720

2,670

2,640

2,700

July

1,180

1,140

1,100

1,040

995

945

925

886

838

790

Day

11

12

13

14

15

16

17

18

19

20

May

766

766

826

847

812

819

898

947

1,040

1,380

June

2,530

2,380

2,200

2,090

2,020

2,070

2,180

1,980

1,870

1,790

July

772

743

705

676

648

620

592

556

574

601

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...... .. .......................................... ... .. ........... ....

Runoff, in inches .................._........................................................................................................

May

1,740

2,030

2,060

2,170

2,120

2,220

2,440

3,000

3,180

3,060

2,880

1,391

7.59

June

1,700

1,630

1,550

1,520

1,490

1,450

1,400

1,340

1,290

1,240

2,118

11.20

July

592

592

565

538

493

484

475

538

520

475

430

711

3.88

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

a

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.40 

5.46 

5.43 

5.44 

5.44 

5.47

875 

917 

896 

903 

903 

924

May 23

6.77 

6.92 

6.95 

7.02 

7.05 

6.92

Ms

8.21 

8.22 

8.20 

8.22 

8.22 

8.25

Ju

8.10 

8.07 

8.01 

7.97 

7.94 

7.95

1,920 

2,050 

2,070 

2,130 

2,160 

2,050

iy29

3,180 

3,190 

3,180 

3,190 

3,190 

3,220

ne4

3,010 

2,970 

2,900 

2,850 

2,820 

2,830

June 10

7.91 

7.95 

7.90 

7.84 

7.74 

7.69

Ju

7.27 

7.27 

7.28 

7.32 

7.36 

7.43

2,780 

2,830 

2,770 

2,700 

2,580 

2,520

ne 16

2,030 

2,030 

2,040 

2,080 

2,130 

2,210

Gaze 

height Discharge

May 18

5.50 

5.48 

5.50 

5.49 

5.51 

5.54

945 

931 

945 

938 

952 

973

May 24

6.98 

7.05 

7.07 

7.13 

7.15 

7.10

M:

8.26 

8.16 

8.15 

8.08 

8.03 

8.03

Ju

7.97 

7.99 

7.95 

7.91 

7.85 

7.86

Ju

7.72 

7.73 

7.72 

7.68 

7.66 

7.66

2,100 

2,160 

2,170 

2,230 

2,240 

2,200

iy30

3,220 

3,090 

3,030 

2,990 

2,930 

2,930

ne5

2,850 

2,880 

2,830 

2,780 

2,710 

2,720

ne 11

2,550 

2,570 

2,550 

2,510 

2,480 

2,480

June 17

7.52 

7.47 

7.40 

7.34 

7.32 

7.28

Supplemental record.

2,140 sec. -ft.; May 23 

sec. -ft.; May 24, 2 a.i 

ft. , 6 p.m. , 2,680 sec 

3,040 sec. -ft.; May 30 

ft.; June 3, 11 a.m.,

2,310 2,aeo

2,180 

2,110 

2,030 

2,040

Gage 

height Discharge

May 19

5.57 

5.60 

5.63 

5.64 

5.70 

5.76

994 

1,020 

1,040 

1,040 

1,080 

1,130

May 25

7.04 

6.92 

7.00 

6.97 

7.00 

7.07

2,150 

2,050 

2,120 

2,090 

2,120 

2,170

May 31

8.05 

8.04 

8.00 

7.96 

7.91 

7.95

Jt

7.89 

7.90 

7.86 

7.80 

7.79 

7.86

Ju

7.66 

7.62 

7.56 

7.53 

7.50 

7.48

2,950 

2,940 

2,890 

2,840 

2,780 

2,830

me 6

2,760 

2,770 

2,720 

2,650 

2,640 

2,720

ne!2

2,480 

2,430 

2,360 

2,330 

2,290 

2,270

June 18

7.28 

7.27 

7.22 

7.20 

7.17 

7.16

2,040 

2,030 

1,970 

1,940 

1,910 

1,900

Gage 

height Discharge

May 20

5.87 

5.98 

6.13 

6.13 

6.30 

6.50

1,210 

1,300 

1,410 

1,410 

1,540 

1,700

May 26

7.10 

7.19 

7.19 

7.10 

7.04 

7.13

Ju

7.99 

8.01 

8.01 

7.97 

7.93 

7.97

Ju

7.92 

7.93 

7.87 

7.79 

7.78 

7.85

Ju

7.48 

7.46 

7.42 

7.38 

7.35 

7.34

2,200 

2,280 

2,280 

2,200 

2,150 

2,230

ne 1

2,880 

2,900 

2,900 

2,850 

2,810 

2,850

ne7

2,790 

2,810 

2,730 

2,640 

2,630 

2,710

ne!3

2,270 

2,240 

2,200 

2,150 

2,120 

2,110

June 19

7.17 

7.15 

7.13 

7.11 

7.09 

7.08

1,910 

1,890 

1,870 

1,850 

1,820 

1,810

Gage 

height Discharge

May 21

6.60 

6.56 

6.58 

6.52 

6.48 

6.64

1,780 

1,75O 

1,760 

1,720 

1,680 

1,810

May 27

7.25 

7.41 

7.37 

7.38 

7.56 

7.61

Ju

8.03 

8.08 

8.04 

7.98 

7.95 

7.97

2,330 

2,460 

2,430 

2,440 

2,590 

2,640

ne2

2,930 

2,990 

2,940 

2,870 

2,830 

2,850

June 8

7.90 

7.88 

7.81 

7.75 

7.72 

7.82

2,770 

2,750 

2,660 

2,590 

2,550 

2,670

June 14

7.35 

7.34 

7.34 

7.32 

7.30 

7.29

2,120 

2,110 

2,110 

2,080 

2,060 

2,050

June 20

7.08 

7.08 

7.07 

7.04 

7.03 

7.02

1,810 

1,810 

1,800 

1,770 

1,760 

1,750

Gage 

height Discharge

May 22

6.68 

6.85 

7.02 

7.02 

7.00 

6.93

1,840 

1,990 

2,130 

2,130 

2,120 

2,060

May 28

7.98 

8.00 

8.08 

8.00 

8.03 

8.15

2,970 

2,990 

3,060 

2,990 

3,020 

3,130

' June 3

8.03 

8.03 

8.02 

8.05 

7.98 

8.04

Ju

7.87 

7.84 

7.78 

7.74 

7.70 

7.77

2,930 

2,930 

2,910 

2,950 

2,870 

2,940

ne9

2,730 

2,700 

2,630 

2,580 

2,530 

2,610

June 15

7.30 

7.29 

7.27 

7.23 

7.23 

7.25

2,060 

2,050 

2,030 

1,980 

1,980 

2,000

June 21

7.02 

7.02 

6.97 

6.95 

6.94 

6.92

1,750 

1,750 

1,690 

1,670 

1,660 

1,640

- May 22, 3 a.m., 6.62 ft., 1,800 sec. -ft., 9 a.m., 7.03 ft., 

, 2 a.m., 6.90 ft., 2,030 sec. -ft., 10 a.m., 6.90 ft., 2,030 

n., 6.88 ft., 2,010 sec. -ft.; May 26, 6 a.m., 7.19 ft., 2,280 sec 

-ft.; May 28, 2 a.m. 7.85 ft., 2,860 sec. -ft., 6 a.m., 8.05 ft., 

, 2 a.m., 8.28 ft., 3,230 sec. -ft., 10 a.m., 8.12 ft., 3,040 sec. 

7.97 ft., 2,830 sec. -ft.
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVKR BASIN

Boulder Creek near Leonia, Idaho

Location.- Lat. 48°36', long. 116 0 06', in NW£ sec. 32, T. 61 N., R. 3 E., three-quarters

 of a mile downstream from McQinty Creek, three-quarters of a mile upstream from

buildings of Idamount Lead-Zinc Mines Co., 2£ miles upstream from mouth, and 2f miles 

southwest of Leonla.

Drainage area.- 53 square miles.

Gage-height record.- Water-stage recorder graph except period 4 a.m. May 29 to 11:30 

a.m. June 4, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below

 660 second-feet and extended to peak stage of flood of Oct. 19, 1947, on basis of 

contracted-opening computation. Discharge for period of no gage-height record computed on basis of records for Moyie River at Eileen. Shifting-control method used 

June 25 to July 31.

Maxima.- May-June 1948: Discharge, 1,710 second-feet 9 p.m. May 27 (gage height, 6.42

1928 to April 1948: Discharge, 2,700 second-feet Oct. 19, 1947 (gage height, 7.85 

feet), by contracted-opening determination. 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

332

305

305

328

298

361

426

535

525

460

June

720

690

660

656

586

563

525

498

451

426

July

92

83

74

71

70

67

70

67

59

56

Day

11

12

IS

14

15

16

17

18

19

20

May

460

535

718

584

535

590

699

721

878

1,070

June

390

341

291

358

288

304

291

259

229

207

July

52

51

48

46

42

40

38

37

50

66

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches............................................................................................ .---.. - 

May

983

1,030

1,070

1,290

1,150

1,110

1,270

1,190

1,00.0

880

770

723

15.72

June

193

178

166

172

169

151

137

125

115

104

341

7.19

July

50

44

39

37

34

32

32

64

56

45

41

53.3

1.16

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

*M

§

ffi

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.77 

4.73 

4.76 

4.82 

4.86 

4.83

634 

662 

678 

712 

736 

718

May 23

5.76 

5.49 

5.33 

5.26 

5.28 

5.27

M

5.29

Ju

4.64 

4.70 

4.78 

4.68

Ju

4.36 

4.34 

4.26 

4.20 

4.20 

4.18

Ju

3.94 

4.00 

4.01 

3.99 

4.00 

4.01

1,280 

1,110 

1,020 

976 

988 

982

»y29

994

ne 4

612 

645 

689 

634

ne 10

465 

455 

417 

390 

390 

382

ne!6

287 

309 

313 

305 

309 

313

Gage 

height Discharge

May 18

4.78 

4.71 

4.69 

4.87 

5.03 

4.99

689 

650 

640 

742 

838 

814

May 24

5.61 

5.81 

5.77 

5.96 

5.96 

5.67

1,190 

1,320 

1,290 

1,410 

1,410 

1,230

May 30

June 5

4.57 

4.52 

4.50 

4.60 

4.72 

4.61

574 

546 

535 

590 

656 

596

June 11

4.23 

4.25 

4.17 

4.15 

4.20 

4.22

404 

412 

377 

369 

390 

399

June 17

4.00 

3.96 

3.93 

3.92 

3.94 

3.92

309 

294 

283 

279 

287 

279

Gage 

height Discharge

May 19

4.90 

4.87 

5.00 

5.27 

5.39 

5.36

760 

742 

820 

982 

1,050 

1,040

May 25

5.39 

5.34 

5.27 

5.87 

5.79 

5.53

Mi

1,050 

1,020 

982 

1,360 

1,300 

1,140

iy31

June 6

4.53 

4.47 

4.45 

4.57 

4.69 

4.56

Ju

4.14 

4.09 

4.05 

4.04 

4.04 

4.02

552 

520 

510 

574 

640 

568

nel2

365 

344 

328 

325 

325 

317

June 18

3.87 

3.84 

3.83

262 

251 

248

Gage 

height Discharge

May 20

5.27 

5.30 

5.32 

5.53 

5.71 

5.36

982 

1,000 

1,010 

1,140 

1,250 

1,040

May 26

5.31 

5.21 

5.25 

5.77 

5.69 

5.52

1,010 

946 

970 

1,290 

1,240 

1,130

June 1

Ji

4.47 

4.40 

4.37 

4.53 

4.57 

4.48

Ju

3.98 

3.94 

3.92 

3.91 

3.94 

4.02

ne 7

520 

485 

470 

552 

574 

525

ne!3

302 

287 

279 

276 

287 

317

June 19

3.79 

3.75 

3.75

234 

220 

220

Gage 

height Discharge

May 21

5.12 

5.06 

5.10 

5.45 

5.46 

5.58

892 

856 

880 

1,090 

1,100 

1,170

May 27

5.33 

5.25 

5.53 

5.08 

6.37 

6.17

1,020 

970 

1,140 

1,490 

1,680 

1,550

June 2

June 8

4.38 

4.32 

4.31 

4.51 

4.56 

4.46

475 

445 

440 

540 

568 

515

June 14

4.23 

4.21 

4.11 

4.07 

4.06 

4.02

404 

394 

352 

536 

332 

317

June 20

3.72 

3.69 

3.68

211 

201 

198

Gage 

height Discharge

May 22

5.32 

5.21 

5.32 

5.37 

5.37 

5.43

1,010 

946 

1,010 

1,040 

1,040 

1,110

May 28

5.77 

5.56 

5.46 

5.52 

5.47 

5.36

1,290 

1,160 

1,100 

1,130 

1,100 

1,040

JuneS

June 9

4.35 

4.28 

4.24 

4.28 

4.39 

4.43

460 

426 

408 

426 

480 

500

June 15

3.97 

3.94 

3.91 

3.92 

3.94 

3.94

298 

287 

276 

279 

287 

287

June 21

3.67 

3.67 

3.64

194 

194 

185

Supplemental record.- May 19, 6 p.m., 5.28 ft., 988 sec. -ft. ; May 20, 2 p.m., 5.33 ft.,

j.,uc.u ,020 sec. DBu.-ib., -ft., 6 D p.m., p.m., o. 5.71 fj. ii/., ft., j.,cou 1,250 sec.-iv.j sec. -ft.; nay May cj., 21, j.j. 11 p.m., p.m., s.ti 5.47 ii/., ft., j.,j.uj 1,100 sec.- sec.-

ft.j May 25, 11 a.m., 5.18 ft., 928 sec.-ft., 6 p.m., 5.92 ft., 1,390 sec.-ft.; May 26, 

10 a.m., 5.18 ft., 928 sec.-ft., 6 p.m., 5.86 ft., 1,350 sec.-ft.; May 27, 9 a.m., 5.22 

ft., 952 sec.-ft., 6 p.m., 6.05 ft., 1,470 sec.-ft., 9 p.m., 6.42 ft., 1,710 sec.-ft.; 

May 28, 2 p.m., 5.61 ft., 1,190 sec.-ft.; June 14, 6 a.m., 4'. 28 ft., 426 sec.-ft.
KOOTENAI RIVER BASIN 71

Moyie River at Eastport, Idaho 

(International gaging station)

Location. - Lat. 49°00', long. 116°11', in SE-J- sec. 10, T. 65 N., R. 2 E., at Eastport,

1,000 feet downstream from international boundary. 

Drainage area.- 570 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

7,130 second-feet and extended to peak stage. 

Maxima.- May-June 1948: Discharge, 8,030 second-feet 11 p.m. May 24 (gage height, 10.25

feet).

1929 to April 1948: Discharge, 6,800 second-feet May 10, 1947; gage height, 9'.46

feet Apr. 28, 1934. 

Remarks.- Ho regulation or diversion above station. This station is one of the international gaging stations maintained by the United States under agreement with Canada.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,590

2,310

2,160

2,210

2,070

2,140

2,380

2,550

2,650

2,560

June

4,630

4,340

4,260

4,300

4,100

3,920

3,750

3,550

3,390

3,540

July

1,180

1,070

983

895

828

774

743

721

663

615

Day

11

12

13

14

15

16

17

18

19

20

May

2,510

2,610

3,460

3,240

2,960

3,140

3,620

3,780

4,290

5,140

June

3,390

3,400

3,080

3,020

2,840

2,740

2,820

2,690

2,460

2,220

July

582

615

563

513

489

466

438

411

427

483

Day

21

22

23

24

25

26

27

28

«9

.30

31

Monthly mean discharge, in second-feet . .. . ............ . . ........ ....................

Runoff, in inches ............................................................................................................................

May

5,960

6,590

7,280

7,680

7,750

7,790

7,770

7,410

6,600

5,670

5,000

4,318

8.73

June

2,010

1,850

1,820

1,900

1,830

1,700

1,650

1,540

1,400

1,300

5.57

July

432

406

379

369

350

330

330

443

460

416

379

573

1.16

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

t*

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

7.51 

7.50 

7.47 

7.47 

7.52 

7.59

M:

9.80 

9.90 

9.91 

9.85 

9.80 

9.75

Mi

9.63 

9.53 

9.40 

9.31 

9.25 

9.18

Ji

8.03 

7.98 

7.95 

7.93 

7.94 

7.95

3,640 

3,630 

3,590 

3,590 

3,660 

3,760

iy23

7,230

7,400 

7,420 

7,320 

7,230 

7,140

iy29

6,940 

6,770 

6,550 

6,400 

6,300 

6,190

ne 4

4,400 

4,320 

4,280 

4,240 

4,260 

4,280

June 10

7.56 

7.47 

7.43 

7.41 

7.38 

7.34

Ju

6.78 

6.76 

6.80 

6.91 

6.93 

6.92

3,710 

3,590 

3,530 

3,500 

3,460 

3,410

nel6

2,660 

2,640 

2,690 

2,830 

2,860 

2,850

Gage 

height Discharge

May 18

7.61 

7.58 

7.54 

7.54 

7.66 

7.83

3,780 

3,740 

3,690 

3,690 

3,850 

4,100

May 24

9.82 

9.97 

10.14 

10.20 

10.20 

10.24

Mi

9.08 

8.95 

8.83 

8.71 

8.65 

8.63

Ju

7.92 

7.86 

7.79 

7.74 

7.77 

7.83

7,260 

7,530 

7,830 

7,940 

7,940 

8,010

iy30

6,030 

5,820 

5,630 

5,440 

5,340 

5,310

ne5

4,230 

4,140 

4,040 

3,970 

4,010 

4,100

June 11

7.32 

7.32 

7.34 

7.32 

7.32 

7.38

3,380 

3,380 

3,410 

3,380 

3,380 

3,460

June 17

6.91 

6.88 

6.89

2,830 

2,790 

2,810

Gage 

height Discharge

May 19

7.88 

7.88 

7.90 

7.97 

8.09 

8.23

4,170 

4,170 

4,200 

4,300 

4,480 

4,700

May 25

10.16 

10.08 

10.00 

10.00 

10.10 

10.21

Mi

8.57 

8.48 

8.38 

8.32 

8.33 

8.36

Jt

7.80 

7.73 

7.65 

7.62 

7.68 

7.73

Ju

7.45 

7.39 

7.33 

7.28 

7.25 

7.23

7,870 

7,720 

7,580 

7,580 

7,760 

7,960

iy31

5,210 

5,070 

4,920 

4,830 

4,840 

4,890

ne6

4,050 

3,950 

3,840 

3,800 

3,880 

3,950

ne!2

3,560 

3,480 

3,390 

3,320 

3,280 

3,250

June 18

6.84 

6.76 

6.72

2,740 

2,640 

2,590

Gage 

height

Ma

8.28 

8.27 

8.32 

8.57 

8.96 

9.16

Discharge

y20

4,770 

4,760 

4,830 

5,210 

5,840 

6,160

May 26

10.23 

10.16 

10.06 

9.98 

10.08 

10.17

Ju

8.31 

8.22 

8.13 

8.08 

8.11 

8.14

Ji

7.67 

7.59 

7.52 

7.47 

7.58 

7.60

Ju

7.18 

7.14 

7.09 

7.04 

7.03 

7.06

7,990 

7,870 

7,690 

7,540 

7,720 

7,890

ne 1

4,820 

4,680 

4,540 

4,470 

4,520 

4,560

ne7

3,870 

3,760 

3,660 

3,590 

3,740 

3,770

ne!3

3,180 

3,130 

3,070 

3,000 

2,990 

3,030

June 19

6.65 

6.58 

6.53

2,500 

2,420 

2,360

height I 1***"*6

May 21

9.14 

9.02 

8.91 

8.91 

9.06 

9.23

Ma

10.17 

10.13 

10.02 

9.99 

10.13 

10.21

6,120 

5,930 

5,760 

5,760 

6,000 

6,270

y27

7,890 

7,810 

7,620 

7,560 

7,810 

7,960

June 2

8.10 

8.02 

7.93 

7.88 

7.94 

8.02

Ju

7.53 

7.45 

7.38 

7.35 

7.43 

7.46

Ju

7.07 

7.08 

7.07 

7.02 

7.03 

7.05

Jui

6.46 

6.36 

6.33

4,500 

4,380 

4,240 

4,170 

4,260 

4,380

neS

3,670 

3,560 

3,460 

3,420 

3,530 

3,570

ne 14

3,040 

3,050 

3,040 

2,980 

2,990 

3,020

ne20

2,270 

2,150 

2,120

Gage 

height

M!

9.32 

9.35 

9.37 

9.45 

9.61 

9.67

Discharge

iy22

6,410 

6,460 

6,500 

6,640 

6,910 

7,010

May 28

10.16 

10.03 

9.85 

9.72 

9.69 

9.71

Ju

7.99 

7.92 

7.87 

7.88 

7.96 

8.02

Ju

7.38 

7.31 

7.23 

7.26 

7.38 

7.42

7,870 

7,630 

7,320 

7,090 

7,040 

7,080

ne3

4,340 

4,230 

4,160 

4,170 

4,290 

4,380

ne9

3,460 

3,360 

3,250 

3,290 

3,460 

3,520

June 15

7.00 

6.95 

6.90 

6.85 

6.83 

6.82

2,950 

2,880 

2,820 

2,760 

2,730 

2,720

June 21

6.27 

6.21 

6.17

2,040 

1,970 

1,920
72 FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Moyle River at"Elleen, Idaho

Location.- Lat. 48°46', long. 116°10', In NE£ sec. 35, T. 63 N., R. 2 E., an eighth of a

mile downstream from Skin Creek, a quarter of a mile southeast of Elleen, and 4 miles

upstream from mouth. 

Drainage area.- 755 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements to

5,000 second-feet; extended to crest stage. Shift adjustments May 24-29 based on

records for station at Eastport. 

Maxima.- May-June 1948: Discharge, 9,650 second-feet 4 a.m. May 26 (gage height, 6.51

1925 to April 1948: Discharge, 8,780 second-feet Apr. 29, 1934 (gage height, 4.55 

feet), from rating curve extended above 6,500 second-feetj maximum gage height, 4.8 

feet, present datum, May 17, June 10, 11, 1927, May 13, 17-19, 1928. 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

3,190

2,830

2,640

2,760

2,570

2,610

2,980

3,210

3,380

3,240

June

5,660

5,290

5,160

5,180

4,980

4,690

4,430

4,160

3,920

4,090

July

1,420

1,300

1,200

1,090

1,050

990

950

930

852

807

Day

11

12

13

14

15

16

17

18

19

20

May

3,170

3,260

4,210

4,040

3,BOO

3,800

4,340

4,460

5,020

5,910

June

3,870

3,960

3,550

3,440

3,220

3,080

3,190

3,010

2,760

2,530

July

762

807

744

674

642

618

589

554

554

642

Day

21

22

28

24

25

26

27

28

29

30

31

Runoff, in inches ............................ .......................... . . ... ...... .................................................

May

7,150

7,690

8,490

9,000

9,250

9,490

9,200

8,900

7,930

6,850

6,170

5,205

7.95

June

2,320

2,180

2,120

2,240

2,200

2,040

1,960

1,830

1,680

1,550

4.94

July

589

547

526

512

477

457

457

610

642

575

526

745

1.14

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

IH

W

4

§ 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

height | Discha^

May 17

4.89 

4.93 

4.92 

4.91 

4.92 

4.93

Ms

5.97 

5.99 

6.03 

6.04 

6.05 

6.06

M

6.33 

6. -32 

6.31 

6.28 

6.27 

6.23

4,290 

4,410 

4,380 

4,350 

4,380 

4,410

iy23

8,280 

8,380 

8,560 

8,610 

8,660 

8,710

iy29

8,330 

8,150 

7,970 

7,710 

7,540 

7,250

June 4

5.65 

5.67 

5.66 

5.66 

5.65 

5.66

5,150 

5,210 

5,180 

5,180 

5,150 

5,180

June 10

5.31 

5.32 

5.31 

5.26 

5.24 

5.23

Ju

4.83 

4.83 

4.83 

4.86 

4.91 

4.92

4,160 

4,190 

4,160 

4,030 

3,970 

3,950

ne!6

3,020 

3,020 

3,020 

3,090 

3,190 

3,210

^Discharge

May 18

4.95 

4.95 

4.94 

4.92 

4.95 

5.01

Mi

6.06 

6.10 

6.13 

6.20 

6.26 

6.29

M

6.17 

6.08 

6.03

Ju

5.62 

5.55 

5.57

Ju

5.18 

5.18 

5.25

4,470 

4,470 

4,440 

4,380 

4,470 

4,650

y24

8,560 

8,760 

8,900 

9,250 

9,450 

9,500

iy30

7,030 

6,670 

6,470

ne 5

5,060 

4,850 

4,910

nell

3,820 

3,820 

4,000

June 17

4.90 

4.88

3,170 

3,130

Gage 

height Discharge

May 19

5.08 

5.10 

5.11 

5.14 

5.20 

5.25

4,870 

4,930 

4,960 

5,060 

5,260 

5,430

May 25

6.28 

6.30 

6.36 

6.47 

6.48 

6.43

9,350 

9,250 

9,150 

9,100 

9,200 

9,400

May 31

5.98 

5.90 

5.90

Jt

5.58 

5.51 

5.46 

5.45 

5.45 

5.49

6,280 

6,000 

6,000

ne6

4,940 

4,730 

4,580 

4,560 

4,560 

4,670

June 12

5.30 

5.20 

5.16

4,130 

3,870 

3,770

June 18

4.83 

4.76

3,020 

2,880

Gage 

height Discharge

May 20

5.30 

5.33 

5.35 

5.42 

5.49 

5.60

5,600 

5,710 

5,780 

6,030 

6,290 

6,720

May 26

6.51 

6.50 

6.48 

6.45 

6.47 

6.45

Ju

5.88 

5.84 

5.77 

5.75 

5.75 

5.77

9,650 

9,600 

9,500 

9,350 

9,450 

9,350

ne 1

5,930 

5,790 

5,540 

5,480 

5,480 

5>540

June?

5.49 

5.45 

5.35 

5.35 

5.36 

5.39

Ju

'5.11

5.05 

5.01 

5.02

4,670 

4,560 

4,270 

4,270 

4,300 

4,380

ne!3

3,640

3,500 

3,410 

3,440

June 19

4.70 

4.62

2,770 

2,630

Gage 

height Discharge

May 21

5.68 

5.70 

5.72 

5.71 

5.74 

5.78

7,040 

7,120 

7,200 

7,160 

7,290 

7,460

May 27

6.43 

6.43 

6.40 

6.43 

6.44 

6.47

9,250 

9,250 

9,100 

9,100 

9,150 

9,300

June 2

5.75 

5.73 

5.67 

5.63 

5.66 

5.68

Ju

5.35 

5.35 

5.30 

5.27 

5.26 

5.27

5,480 

5,400 

5,210 

5,090 

5,180 

5,240

ne8

4,270 

4,270 

4,130 

4,050 

4,030 

4,050

June 14

5.03 

5.04 

5.04 

5.02 

4.99 

5.00

3,460 

3,480 

3,480 

3,440 

3,370 

3,390

June 20

4.57 

4.49

2,540 

2,400

Gage 

height Discharge

May 22

5.79 

5.81 

5.82 

5.83 

5.89 

5.94

Ma

6.45 

6.43 

6.39 

6.39 

6.36 

6.35

Ju

5.66 

5.65 

5.64 

5.64 

5.64 

5.68

Ju

5.28 

5.24 

5.18 

5.14 

5.20 

5.29

7,500 

7,580 

7,630 

7,670 

7,930 

8,150

y28

9,200 

9,100 

8,900 

8,710 

8,560 

8,520

ne3

5,180 

5,150 

5,120 

5,120 

5,120 

5,240

ne9

4,080 

3,970 

3,820 

3,720 

3,870 

4,100

June 15

4.99 

4.96 

4.92 

4.88 

4.85 

4.85

3,370 

3,300 

3,210 

3,130 

3,060 

3,060

June 21

4.43 

4.39

2,310 

2,240
KOOTENAI RIVER BASIN '°

Deep Creek at Moravia, Idaho

Location.- Lat. 48°38 I , long. 116 0 24', In sec. 18, T. 61 N., R. I.E., at concrete

highway bridge, 1 mile downstream from Ruby Creek and 1 mile southwest of Moravia. 

Drainage area.- 133 square miles. 

gage-height record.- Staff gage read once dally to hundredths. 

Discharge record.-""Stage-discharge relation defined by current-meter measurements.

Shifting-control method used May 27 to July 31. 

Maxima.- May-June 1948: Discharge observed, 1,110 second-feet 2:30 p.m. May 24 (gage

Height, 4.12 feet).

1928 to April 1948: Discharge observed, 1,300 second-feet Dec. 22, 1933; gage

height observed, 4.46 feet May 6, 1945. 

Remarks.- Small diversion above station for Irrigation.

Mean discharge, in seamd-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

437

424

477

539

518

511

598

797

860

797

June

539

500

554

649

554

490

487

473

514

554

July

164

155

151

139

131

139

147

131

120

112

Day

11

12

13

14

15

16

17

18

19

20

May

669

598

941

887

806

685

770

685

752

1,000

June

477

417

417

373

342

355

417

348

318

277

July

109

109

101

88

80

79

73

70

76

88

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches . ..... ....... .. _ ....

May

1,000

1,040

1,080

1,110

1,060

1,000

936

950

856

677

550

775

6.71

June

238

289

289

300

283

274

257

246

200

181

387

3.25

July

91

85

82

76

73

76

82

135

120

91

79

105

0.91

Gage height, in feet, and discharge, in second-feet, af indicated time, 1948

Hour

4

3:30

4

3

3

3:30

4:30

2:30

3

Gage

height Discharge

May 17

3.40 770

May 18

3.20 685

May 19

3.36 752

May 20

3.90 1,000

May 21

3.90 1,000

May 22

3.98 1,040

May 23

4.06 1,080

May 24

4.12 1,110

May 25

4.02 1,060

Hour

3:10

3

2:30

3

4:20

3

3:10

3

3

Gage

height Discharge

May 26

3.90 1,000

May 27

3.76 936

May 28

3.78 950

May 29

3.56 856

May 30

3.14 677

May 31

2.80 550

June 1

2.76 539

June 2

2.64 500

June 3

2.78 554

Hour

3

3

4:10

4:20

3:10

4

4

4:20

12:15

4

3

Gage 

height Discharge

June 4 .

3.02 649

June 5

2.80

2.74

Jur

2.60

Jur

2.60

Jur

2.56

564

543

le 6

490

le 7

487

le 8

473

June 9

2.68 514

June 10

2.80

Jur

2.57

2.60

554

le 11

473

483

June 12

2.40 417

Hour

3

2:30

3

3

2:30

2:45

3

4

2:45

Gage 

height Discharge

June 13

2.40 417

June 14

2.26 373

June 15

2.16 342

June 16

2.20 355

June 17

2.40 417

June 18

2.18 348

June 19

2.08 318

June 20

1.94 277

June 21

1.80 238

Note.- All readings made after noon.
74 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Long Canyon Creek near Porthlll, Idaho

Location.- Lat. 48°57', long. 116°32', In NW£ sec. 36, T. 65 N., R. 2 W., at U. S.

Forest Service bridge at mouth of canyon, 4 miles southwest of Porthlll. (See pi. 9B.) 

Drainage area.- 29 square miles. ' 

Gage-height record.- Water-stage recorder graph to 10 p.m. May 26, when gage was

destroyed. 

Discharge record.- Stage-discharge relation defined by current-meter measurements

below 205 second-feet. 

Maxima.- May-June 1948: Discharge, 1.300 second-feet May 26 or 27, by slope-area

method (gage height not determined).

1928 to April 1948: Dally discharge, 950 second-feet (estimated) June 15,

1933; gage height, 8.55 feet, present datum, June 14, 15, 1933 (drift Jam). 

Remarks.- No diversion above station.

Mean discharge, in second-feet, 19^8

Day

1

2

3

4

5

6

7

8

9

10

May

79

74

74

77

73

79

93

113

120

115

June July Day

11

12

13

14

15

16

17

18

19

20

May

115

120

170

158

150

158

179

186

203

254

June July Day

21

22

23

24

25

26

27

28

29

30

31

May

307

320

369

366

403

429

June July

Gage height, in feet, and discharge, in second-feet, at indicated time,

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.56 

2.56 

2.56 

2.57 

2.57 

2.58

178 

178 

178 

180 

180 

182

May 23

3.30 

3.38 

3.40 

3.50 

3.40 

3.37

347 

367 

372 

398 

372 

364

Gage 

height Discharge

May 18

2.59 

2.60 

2.59 

2.60 

2.62 

2.65

184 

186 

184 

186 

190 

196

May 24

3.37 

3.38 

3.37 

3.33 

3.37 

3.38

364 

367 

364 

354 

364 

367

Gage 

height

ME

2.66 

2.66 

2.66 

2.68 

2.72 

2.76

Discharge

iy!9

199 

199 

199 

203 

211 

220

May 25

3.44 

3.39 

3.47 

3.46 

3.74 

3.55

382 

370 

390 

388 

462 

411

Gage 

height Discharge

May 20

2.80 

2.84 

2.86 

2.96 

3.07 

3.10

229

238 

242 

265 

291 

298

May 26

3.54 

3.52 

3.48 

3.55 

3.79

408 

403 

393 

411 

475

Gage 

height

M

3.14 

3.10 

3.11 

3.13 

3.19 

3.21

Discharge

»y21

308 

298 

300 

305 

320 

324

May 27

Gage 

height Discharge

May 22

3.17 

3.18 

3.17 

3.18 

3.25 

3.26

Ms

315 

317 

315 

317 

334 

337

iy28

Supplemental record.- May 22, 6 p.m., 3.16 ft., 312 sec.-ft.j May 23, 6 p.m., 3.51 

ft., 401 sec.-ft. ; May 24, 6 p.m., 3.33 ft., 354 sec.-ft., 7 p.m., 3.47 ft., 390 sec.- 

ft.; 10 p.m., 3.45 ft., 385 sec.-ft.; May 25, 10 a.m., 3.51 ft., 401 sec.-ft.; 10 p.m., 

8.82 ft., 484 sec.-ft. ; May 26, 1 a.m., 3.65 ft., 438 sec.-ft., 10 p.m., 4.07 ft., 544 

sec.-ft.
KOOTENAI RIVKR BASIN

Smith Creek near Porthill, Idaho 

Location.- Lat. 48°57'40", long. 116°33'20", In NE£ sec. 26, T. 65 N., R. 2 W., at

southwest 63! perthillbrid8e ' 1 mile 3°Uth °f Smith Cree]xi ranSer station and 4 miles 

Drainage area.- 70 square miles. 

Page-height record.- Water-stage recorder graph except periods 4:30 p.m. June 12 to

9 p.m. June 13, 5:30 a.m. June 14 to 1:30 p.m. June 15, for which gage heights were

computed on basis of recorder graph for Boundary Creek near Porthill. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

1,500 second-feet and extended to peak stage. Shifting-control method used May 1-26 

Maxima.- May-June 1948: Discharge, 2,480 second-feet 9 p.m. May 27 (gage height, 7.37

1928 to April 1948: Discharge, 3,150 second-feet May 17, 1941 (gage height, 7.36 

feet, site then in use), from rating curve extended above 1,600 second-feet. 

Remarks.- No diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

260

239

239

247

227

260

326

386

413

376

June

1,420

1,450

1,470

1,530

1,480

1,470

1,540

1,540

1,400

1,300

July

254

220

198

175

207

196

192

188

155

139

Day

11

12

13

14

15

16

17

18

19

20

May

370

406

640

522

465

541

669

681

864

1,310

June

1,270

1,160

955

845

781

988

860

700

630

562

July

130

124

131

111

106

104

92

108

111

107

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet...... ................................ .......................................

Runoff, in inches .............. . . ................................................

May 1

1,420

1,440

1,410

1,290

1,400

1,640

1,930

1,880

1,590

1,320

1,310

841

13.85

June

519

518

480

719

522

473

420

370

326

292

933

14.87

July

94

84

77

79

71

65

82

156

112

92

80

130

2.15

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

ft. 

ft. 

sec 

sec 

sec 

Jun 

6.0 

1,0

Gage 

height Discharge

May 17

4.48 

4.47 

4.45 

4.45 

4.47 

4.48

ME

5.84 

5.80 

5.74 

5.66 

5.66 

5.57

Ms

6.18 

6.00 

5.84 

5.88 

5.92 

5.81

Ju

5.89 

5.78 

5.78 

5.89 

6.02 

5.98

Ju

5.49 

5.45 

5.68 

5.55 

5.38 

5.20

Ju

4.57 

4.67 

5.01 

5.38 

5.20 

5.11

675 

670 

661 

661 

670 

675

y23

1,470 

1,450 

1,410 

1,370 

1,370 

1,310

iy29

1,710 

1,600 

1,500 

1,530 

1,550 

1,490

ne 4

1,530 

1,470 

1,470 

1,530 

1,610 

1,590

ne 10

1,290 

1,270 

1,410 

1,330 

1,230 

1,120

ne!6

781 

830 

1,020 

1,230 

1,120 

1,070

Gj^J Discharge

May 18

4.46 

4.42 

4.40 

4.44 

4.57 

4.65

675 

657 

648 

666 

724 

761

May 24

5.53 

5.47 

5.40 

5.44 

5.61 

5.72

Ms

5.68 

5.49 

5.34 

5.38 

5.60 

5.65

Ju

5.81 

5.62 

5.49 

5.78 

6.08 

6.02

Ju

5.23 

5.39 

5.33 

5.28 

5.82 

5.94

Ju

4.98 

4.80 

4.65 

4.55 

4.53 

4.50

1,300 

1,260 

1,220 

1,250 

1,350 

1,410

iy30

1,410 

1,290 

1,200 

l,2i<5 

1,360 

1,390

ne5

1,490 

1,370 

1,290 

1,470 

1,650 

1,610

nell

1,140 

1,230 

1,200 

1,170 

1,490 

1,-560

ne!7

999 

900 

820 

771 

761 

747

Supplemental record.- May 2

, 1,370 sec. -ft.; May 26, 10 

, 1,590 sec. -ft., 9 p.m., 7. 

.-ft.; June 2, 10 p.m., 6.23 

.-ft.; June 6, 9 p.m., 6.29 

.-ft.; June 9, 10 a.m., 5.31 

B 11, 2 a.m., 5.17 ft., 1,10 

4 ft., 1,620 sec. -ft.; June 

70 see. -ft.

Gage 

height Discharge

May 19

4.65 

4.64 

4.66 

4.89 

5.19 

5.32

766 

761 

771 

889 

1,050 

1,130

May 25

5.61 

5.46 

5.35 

5.66 

6.11 

6.17

Mi

5.52 

5.37 

5.27 

5.46 

5.73 

5.77

Ju

5.79 

5.50 

5.29 

5.77 

6.22 

6.10

Ju

5.63 

5.29 

5.55 

5.49

1,350 

1,260 

1,200 

1,380 

1,650 

1,690

iy31

1,310 

1,220 

1,160 

1,280 

1,440 

1,460

ne6

1,470 

1,300 

1,170

I,4r60

1,730 

1,660

ne!2

1,380 

1,170 

1,330 

1,290

June 18

4,43 

4.36 

4.28 

4.31 

4.51 

4.47

715 

683 

648 

661 

752 

733

Gage 

height Discharge

May 20

5.35 

5.39 

5.60 

5.80 

5.90 

5.83

1,160 

1,180 

1,310 

1,430 

1,490 

1,440

May 26

6.00 

5.82 

5.64 

6.07 

6.52 

6.48

Ju

5.67 

5.51 

5.44 

5.79 

5.93 

5.94

1,590 

1,490 

1,380 

1,640 

1,910 

1,890

ne 1

1,400 

1,310 

1,260 

1,470 

1,560 

1,560

June?

5.83 

5.57 

5.41 

6.00 

6.42 

6.15

Ju

1,500 

1,340 

1,250 

1,600 

1,850 

1,690

ne!3

June 19

4.33 

4.21 

4.10 

4.12 

4.29 

4.26

670 

618 

573 

581 

653 

640

Gage 

height Discharge

May 21

5.68 

5.51 

5.63 

5.85 

6.04 

5.96

1,360 

1,260 

1,330 

1,460 

1,580 

1,530

May 27

6.28 

6.09 

6.00 

6.69 

7.22 

7.16

Ju

5.74 

5.52 

5.31 

5.70 

6.13 

6.13

Ju

5.83 

5.58 

5.47 

6.03 

6.38 

6.04

Ju

Jui

4.16 

4.05 

3.98 

3.99 

4.09 

4.07

1,770 

1,650 

1,600 

2,030 

2,370 

2,330

ne2

1,440 

1,310 

1,190 

1,420 

1,680 

1,680

n«8

1,500 

1,350 

1,280 

1,620 

1,830 

1,620

ne 14

ne20

598 

553 

525 

529 

569 

561

Gage 

height

Ms

5.86 

5.74 

5.67 

5.76 

5.83 

5.86

Discharge

iy22

1,480 

1,410 

1,370 

1,420 

1,460 

1,480

May 28

6.76 

6.40 

6.17 

6.26 

6.38 

6.28

Ju

5.85 

5.65 

5.52 

5.66 

5.93 

5.97

Ju

5.72 

5.41 

5.29 

5.78 

5.94 

5.73

' Ju

4.68

Ju

3.98 

3.93 

3.91 

3.93 

3.98 

4.04

2,070 

1,840 

.1,700 

1,760 

1,830 

1,770

ne3

1,510 

1,390 

1,310 

1,400 

1,560 

1,580

ne9

1,430 

1,250 

1,170 

1,470 

1,560 

1,440

ne 15

835

ne21

525 

506 

499 

506 

525 

549

1, 9 a.m., 5.63 ft., 1,330 sec. -ft.; May 22, 9 a.m., 5.68 

p.m., 6.62 ft., 1,980 sec. -ft.; May 27, 11 a.m., 5.98 

57 ft., 2,480 sec. -ft.; May 30, 2 p.m., 5.31 ft., 1,190 

ft., 1,740 sec. -ft.; June 5, 9:30 p.m., 6.13 ft., 1,680 

Ft., 1,770 sec. -ft.; June 8, 10 a.m., 5.48 ft., 1,290 

ft., 1,190 sec. -ft., 5 p.m., 5.88 ft., 1,530 sec. -ft.; 

3 see. -ft., 6 a.m., 5.40 ft. 1,240 sec. -ft., 10 p.m., 

16, 10 a.m., 4.93 ft., 972 sec. -ft., 2 p.m., 5.11 ft..
FLOODS OP MAY-JUHE 1948 IN COLOMBIA RIVER BASIN

Boundary Creek near Porthill, Idaho 

(international gaging station)

Location.- Lat. 48°59'50", long. 116°34'05", In SW£ sec. 11, T. 65 N., R. 2 W., 140 

feet downstream from bridge at mouth of canyon, 0.2 mile south of International 

boundary, and 3 miles west of Porthlll.

Drainage area^- 97 square miles.

Gage-height record.- Water-stage recorder graph except for period May 5-10, when there 

was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

1,430 second-feet and extended to peak atage. Discharge for period of no gage-height 

record computed on basis of records for Smith Creek near Porthlll.

Maxlira.- May-June 1948: Discharge, 2,530 second-feet 12:30 a.m. May 28 (gage height,

1928 to'Aprll 1948: Discharge, 2,400 second-feet June 15, 1933 (gage height, 5.22 

feet), from rating curve extended above 1,500 second-feet.

Remarks.- No diversion above station. This station Is one of the International gaging 

stations maintained by the United States under agreement with Canada.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

328

298

294

312

280

340

400

450

490

440

June

1,450

1,420

1,410

1,440

1,400

1,350

1,380

1,360

1,280

1,230

July

250

226

206

188

206

201

198

206

173

158

Day

11

12

13

14

15

16

17

18

19

20

May

431

498

730

630

557

625

805

815

965

1,380

June

1,220

1,170

918

827

762

838

789

669

594

546

July

149

145

145

130

123

123

111

114

121

109

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet... . .... ........................................................

Runoff, in inches ............................................................................................................................

May

1,550

1,600

1,670

1,540

1,550

1,820

2,040

1,970

1,610

1,360

1,310

11.15

June

508

480

458

635

530

480

414

359

320

284

10.17

July

103

96

89

90

82

77

90

160

121

98

87

141

1.68

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

SH

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 8- 

12

Gage 

height Discharge

May 17

3.32 

3.31

3.31 

3.33

Ms

4.48 

4.50 

4.46 

4.39 

4.32 

4.35

Mi

4.55 

4.38 

4.25 

4.15

4.19

Jl

4.11 

4.05 

4.07 

4.12 

4.21 

4.22

809 

803

803 

815

ly23

1,710 

1,730 

1,710 

1,640 

1,580 

1,610

iy29

1,790 

1,650 

1,550 

1,470

1,500

ne4

1,420 

1,370 

1,390 

1,430 

1,500 

1,510

June 10

3.85 

3.83 

4.07 

3.93 

3.81 

3.72

1,190 

1,180 

1,370 

1,250 

1,160 

1,100

June 16

3.18 

3.26 

3.38 

3.51 

3.45 

3.42

736 

780 

852 

938 

897 

878

Gage 

height Discharge

May 18

3.33 

3.30 

3.37 

3.27 

3.33 

3.42

815 

797 

839 

780 

815 

871

May 24

4.35 

4.30 

4.22 

4.17 

4.20 

4.34

1,610 

1,570 

1,500 

1,460 

1,490 

1,600

May 30

4.11 

4.07 

3.97 

3.89 

3.91 

4.06

Ju

4.09 

3.99 

3.90 

4.07 

4.24 

4.14

1,440 

1,410 

1,330 

1,260 

1,280 

1,400

ne5

1,410 

1,330 

1,250 

1,390 

1,530 

1,450

June 11

3.71 

3.81

3.82 

4.12 

4.24

Ju

3.43 

3.32

3.20 

3.17

1,090 

1,160

1,170 

1,410 

1,500

ne!7

878 

809

741 

724

Gaze 

height Discharge

May 19

3.45 

3.44 

3.42 

3.50 

3.79 

3.92

897 

890 

878 

931 

1,130 

1,230

May 25

4.32 

4.16 

4.12 

4.12 

4.38 

4.70

M:

4.05 

3.95 

3.86 

3.83 

3.92 

4.11

1,590 

1,460 

1,430 

1,430 

1,640 

1,900

iy31

1,390 

1,310 

1,240 

1,210 

1,290 

1,440

June 6

4.04 

3.88 

3.84 

4.00 

4.28 

4.17

Ju

3.99 

3.82 

3.73 

3.69 

3.74 

3.66

1,360 

1,230 

1,200 

1,330 

1,550 

1,460

ne!2

1,290 

1,160 

1,100 

1,070 

1,110 

1,050

June 18

3.06 

3.00 

3.01 

3.10 

3.05

665 

635 

640 

686 

660

Gage 

height

Mi

3.97 

3.96 

4.04 

4.12 

4.33 

4.46

Discharge

iy20

1,280 

1,270 

1,330 

1,400 

1,570 

1,670

May 26

4.67 

4.54 

4.40 

4.35 

4.78 

4.96

1,880 

1,770 

1,660 

1,620 

1,980 

2,140

June 1

4.10 

4.05 

4.05 

4.13 

4.28 

4.22

Jl

4.03 

3.87 

3.84 

4.13 

4.35 

4.18

1,430. 

1,397 

1,390 

1,450 

1,570 

1,530

ne 7

1,350 

1,220 

1,200 

1,430 

1,610 

1,470

June 13

3.54 

3.46 

3.39 

3.38 

3.49 

3.45

966 

910 

864 

858 

931 

904

June 19

2.95

2.86 

2.85 

2.90 

2.97

610

566 

562 

585 

620

Gage 

height Discharge

May 21

4.41 

4.19 

4.15 

4.25 

4.35 

4.41

1,640 

1,460 

1,430 

1,510 

1,590 

1,640

May 27

4.87 

4.73 

4.62 

4.62 

5.03 

5.28

2,070 

1,950 

1,850 

1,850 

2,220 

2,470

June 2

4.10 

3.98 

3.86 

4.02 

4.33 

4.32

1,420 

1,330 

1,230 

1,360 

1,610 

1,600

June 8

4.01 

3.85 

3.82 

4.13 

4.30 

4.10

1,330 

1,200 

1,180 

1,420 

1,560 

1,400

June 14

3.38 

3.32 

3.28 

3.28 

3.38 

3.33

852 

815 

791 

791 

852 

821

June 20

2.87 

2.78

2.80 

2.78

566 

526

534 

526

Gage 

height

M

4.43 

4.35 

4.22 

4.27 

4.43 

4.47

Discharge

iy22

1,660 

1,600 

1,490 

1,530 

1,660 

1,690

May 28

5.13 

4.80 

4.57 

4.44 

4.56 

4.65

Ju

4.11 

4.01 

3.93 

4.01 

4.15 

4.21

Jl

3.89 

3.81 

3.74 

4.06 

4.13 

4.05

2,320 

2,010 

1,810 

1,700 

1,800 

1,880

ne3

1,430 

1,350 

1,290 

1,350 

1,460 

1,510

ne9

1,230 

1,170 

1,120 

1,370 

1,420 

1,360

June 15

3.25 

3.19 

3.14 

3.18 

3.31 

3.25

774 

741 

714 

736 

809 

774

June 21

2.75

2.71 

2.72 

2.77 

2.75

512

494 

498 

521 

512

Supplemental record.- May 27, 3 p.m., 4.56 ft., 1,800 sec.-ft.; May 28, 12:30 a.m., 

5.34 ft., Z,530 sec.-ft.; June 7, 7 p.m., 4.38 ft., 1,630 sec.-ft.; June 8, 7 p.m., 

4.32 ft., 1,570 sec.-ft.; June 10, 10 a.m., 4.02 ft., 1,330 sec.-ft.; June 11, 2 a.m., 

3.67 ft., 1,060 sec.-ft., 10 p.m., 4.32 ft., 1,570 sec.-ft.; June 19", 10 p.m., 2.98 ft. 

625 sec.-ft.
KOOTENAI RIVER BASIN 77

Slocan River at Crescent Valley, British Columbia

Location.- Lat. 49°29'57, long. 117°37'24JI , three-quarters of a mile upstream from

Crescent Valley post office. 

Drainage area.- 1,270 square miles. 

Gage-height record.- Water-stage recorder graph except for periods June 6, 7, 11-14,

when there was no gage-height record. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Discharge'for periods of no gage-height record estimated.

Maxima.- May-June 1948: Discharge, 24,700 second-feet 4 p.m. June 10 (gage height, 

 11784 feet).

1913-15, 1925 to April 1948: Discharge, 24,000 second-feet May 27, 1928. 

Remarks.- Records furnished by Dominion Water and Power Bureau, Department of Mines

and Resources, Canada.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

3,460

3,300

3,220

3,340

3,270

3,260

3,520

3,680

3,770

3,800

June

17,300

17,900

18,900

20,200

20,200

20,600

21,100

21,500

21,700

23,900

July

6,660

6,150

5,670

5,300

5,220

5,260

4,970

4,830

4,540

4,290

Day

11

1?

13

14

15

16

17

18

19

20

May

3,880

4,050

4,720

4,860

4,620

4,620

5,560

6,220

6,460

7,940

June

22,200e

20,500e

18,900e

17,200e

15,500

14,900

14,200

13,100

12,200

11,700

July

4,210

4,320

. 4,260

4,010

3,820

3,700

3,570

3,480

3,450

3,390

Day

21

22

83

24

25

26

27

28

29

SO

31

Monthly mean discharge, in second-feet . . . ..... . .

Runoff, in inches ............................................................................................................................

May

10,500

11,400

12,100

13,800

13,800

15,600

18,300

20,300

19,200

17,500

17,000

8,290

7.53

June

11,400

10,500

9,590

9,100

8,620

8,220

7,840

7,620

7,440

7,140

15,000

13.18

July

3,260

3,130

3,040

3,090

2,960

2,800

2,740

2,840

2,780

2,690

2,590

3,970

3.61

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.82 

6.98 

7.12 

7.23 

7.31 

7.41

5,130 

5,370 

5,590 

5,770 

5,900 

^6,070

May 23

10.06 

10.11 

10.24 

10.42 

10.61 

10.82

M<

13.23 

13.13 

12.98 

12.78 

12.68 

12.60

Ju

13.36 

13.30 

13.22 

13 -.25 

13.32 

13.40

11,500 

11,700 

12,000 

12,400 

12,900 

13,400

iy29

20,000 

19,700 

19,300 

18,700 

18,500 

18,200

ne4

20,400 

20,200 

20,000 

20,000 

20,200 

20,500

June 10

14.30 

14.45 

14.75 

14.84 

14.80 

14.62

23,100 

23,500 

24,400 

24,700 

24,600 

24,000

June 16

11.48 

11.38 

11.32 

11.31 

11.38 

11.38

15,200 

14,900 

14,700 

14,700 

14,900 

14,900

Gage 

height Discharge

May 18

7.47 

7.49 

7.50 

7.48 

7.51 

7.57

6,170 

6,200 

S.220 

6,190 

6,240 

6,340

May 24

10.96 

10.99 

10.98 

10.93 

10.92 

10.96

13,800 

13,900 

13,800 

13,700 

13,700 

13,800

May 30

12.51 

12.40 

12.28 

12.17 

12.14 

12.23

Ju

13.38 

13.28 

13.13 

13.10 

13.35 

13.50

18,000 

17,700 

17,300 

17,000 

17,000 

17,200

ne 5

20,400 

20,100 

19,700 

19,600 

20,300 

20,800

June 11

14.35 

14.05 

13.80

23,200 

22,300 

21,600

June 17

11.34 

11.18 

11.13 

11.01 

10.98 

10.98

14,800 

14,400 

14,200 

13,900 

13,800 

13 , 800

Gage 

height Discharge

May 19

7.61 

7.61 

7.60 

7.61 

7.66 

7.84

6,410 

6,410 

6,390 

6,410 

6,500 

6,820

May 25

10.99 

10.95 

10.86 

10.82 

10.97 

11.31

Ms

12.22 

12.17 

12.07 

12.02 

12.04 

12.17

Ju

13.42 

13.28 

13.12

13,900 

13,800 

13,500 

13,400 

13,800 

14,700

iy31

17,200 

17,000 

16,800 

16,600 

16,700 

17,000

ne6

20,500 

20,100 

19,700

June 12

June 18

10.90 

10.80 

10.70 

10.58 

10.58 

10.54

13,600 

13,400 

13,100 

12,800 

12,800 

12,700

Gage 

height Discharge

May 20

8.02 

8.18 

8.34 

8.52 

8.84 

9.23

7,160 

7,560 

7,780 

8,140 

8,780 

9,620

May 26

11.53 

11.57 

11.50 

11.52 

11.88 

12.35

Ju

12.23 

12.21 

12.19 

12.18 

12.30 

12.50

15,300 

15,400 

15,200 

15,300 

16,300 

17,500

ne 1

17/200 

17,100 

17,100 

17,100 

17,400 

18,000

June?

13.30 

13.60 

13.83

Ju

20,200 

21,000 

21,700

ne!3

June 19

10.49 

10.40 

10.30 

10.20 

10.21 

10.27

12,600 

12,400 

12,100 

11,900 

11,900 

12,000

Gage 

height Discharge

May 21

9.47 

9.60 

9.63 

9.64 

9.69 

9.86

10,200 

10,400 

10,500 

10,500 

10,700 

11,100

May 27

12.52 

12.54 

12.52 

12.50 

12.90 

13.37

18,000 

18,100 

18,000 

18,000 

19,100 

20,400

June 2

12.55 

12.48 

12.40 

12.38 

12.58 

12.77

Ju

13.82 

13.74 

13.12 

13.12 

13.88 

14.05

18,100 

17,900 

17,700 

17,600 

18,200 

18,700

ne8

21,700 

21,400 

19,700 

19,700 

21,900 

22,300

June 14

11.88 

11.88 

11.81 

11.89

16,300 

16,300 

16,100 

16,300

June 20

10.25 

10.19 

10.10 

10.02 

10.01 

10.05

12,000 

11,800 

11,600 

11,400 

11,400 

11,500

Gage 

height

Me

9.99 

10.03 

10.01 

9.98 

9.97 

10.02

Discharge

iy22

11,400 

11,500 

11,400 

11,300 

11,300 

11,400

May 28

13.55 

13.45 

13.30 

13.20 

13.20 

13.25

20,900 

20,600 

20,200 

19,900 

19,900 

20,000

June 3

12.80 

12.73 

12.65 

12.75 

13.07 

13.34

18,800 

18,600 

18,400 

18,600 

19,500 

20,300

June 9

13.98 

13.82 

13.65 

13.60 

13.80 

14.12

22,100 

21,700 

21,200 

21,000 

21,600 

22,500

June 15

11.78 

11.69 

11.58 

11.43 

11.41 

11.48

16,000 

15,700 

15,400 

15,000 

15,000 

15,200

June 21

10.07 

10.11 

10.07 

9.97 

9.91 

9.89

11,600 

11,700 

11,600 

11,300 

11,200 

11,100

824933 O - 49 - 7
FLOODS OP HAY-JOKE 1948 IN COLUMBIA RIVER BASIN

Fend Orellle River Basin

Clark Pork above Missoula, Mont.

Location.- Lat. 46°53', long. 113e 56', In NW£ sec. 19, T. 13 N., R. 18 W., 3 miles

downstream from Blackfoot River and 3 miles east of Missoula. 

Drainage area.- 5,740 square miles. 

Sage-height record.- Water-stage recorder graph. 

Discharge record. -^Stage-discharge relation defined by current-meter measurements.

Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 31,500 second-feet 3 p.m. May 23 (gage height, 

 I3TTJ7 feet).

1929 to April 1948: Discharge, 24,200 second-feet May 9, 1947 (gage height,

11.10 feet). 

Remarks.- Plow partly regulated by power plant at Bonner. Several diversions above

station for Irrigation.

Mean discharge, in seconds-feet, 1S4S

Day

1

2

3

4

5

6

7

8

9

10

May

8,130

7,960

7,500

7,280

7,260

6,930

7,330

10,200

11,700

11,300

June

22,100

21,100

21,100

23,800

25,300

24,600

23,200

21,400

19,800

18,500

July

7,960

8,040

8,350

7,150

6,670

5,970

5,830

5,510

5,180

5,120

Day

11

12

13

14

15

16

17

18

19

20

May

10,700

10,200

10,100

10,400

10,600

10,600

10,800

13,000

16,200

20,900

June

17,600

17,100

16,100

15,000

13,500

12,300

12,300

12,000

11,100

10,500

July

4,260

4,770

4,680

4,370

4,200

4,040

4,350

3,280

4,310

4,660

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..... . ...................................................................

Runoff, in inches ............................................................................................................................

May

26,200

28,200

28,800

27,600

25,400

25,000

25,300

25,300

25,900

25,100

23,400

15,980

3.20

June

10,000

10,600

11,200

11,600

11,600

11,300

10,600

9,880

9,110

8,450

15,420

3.00

July

4,540

4,220

3,880

3,760

3,670

3,480

3,310

3,330

3,530

3,650

3,440

4

00*

0.97

Gage height, in feet, arid discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.98 

6.98 

7.07 

7.14 

7.21 

7.31

10,500 

10,500 

10,700 

10,900 

11,100 

11,400

May 23

12.17 

12.25 

11.97 

12.85 

12.42 

12.40

M

11.58 

11.68 

11.65 

11.53 

11.52 

11.52

28,100 

28,400 

27 , 400 

30,700 

29,100 

29,000

»y29

25,900 

26,300 

26,200 

25,700 

25,700 

25,700

June 4

10.66 

10.80 

11.02 

11.22 

11.25 

11.32

22,600 

23,100 

23,900 

24,600 

24,700 

25,000

June 10

9.61 

9.56 

9.50 

9.46 

9.41 

9.37

Ju

7.71 

7.65 

7.60 

7.54 

7.53 

7.52

18,900 

18,700 

18,500 

18,300 

18,200 

18,000

nel6

12,600 

12,400 

12,300 

12,100 

12,100 

12,100

Gage 

height Discharge

May 18-

7.41 

7.61 

7.84 

8.07 

8.23 

8.37

Ms

12.33 

12.17 

12.02 

11.88 

11.71 

11.62

M

11.50 

11.41 

11.35 

11.30 

11.26 

11.17

Ju

11.39 

11.54 

11.45 

11.40 

11.40 

11.25

11,700 

12,300 

13,000 

13,700 

14,300 

14,700

y24

28,700 

28,100 

27,600 

27,000 

26,400 

26,100

»y 30

25,600 

25,300 

25,100 

24,900 

24,800 

24,500

ne 5

25,200 

25,800 

25,500 

25,300 

25,300 

24,700

June 11

9.33 

9.29 

9.20 

9.17 

9.14 

9.15

17,900 

17,800 

17,500 

17,400 

17,300 

17,300

June 17

7.50 

7.52 

7.58 

7.67 

7.67 

7.64

12,000 

12,100 

12,200 

12,500 

12,500 

12,400

Gage 

height Discharge

May 19

8.49 

8.65 

8.82 

8.97 

9.14 

9.36

Mi

11.55 

11.55 

11.40 

11.40 

11.33 

11.28

Mi

10.99 

10.93 

10.92 

10.83 

10.71 

10.70

15,100 

15,600 

16,200 

16,700 

17,300 

18,000

iy25

25,800 

25,800 

25,300 

25,300 

25,000 

24,800

iy31

23,800 

23,600 

23,600 

23,200 

22,800 

22,800

June 6

11.30 

11.28 

11.18 

11.22 

11.18 

 11.12

24,900 

24,800 

24,500 

24,600 

24,500 

24,300

June 12

9.14 

9.16 

9.13 

9.10 

9.04 

9.01

17,300 

17,300 

17,200 

17,100 

16,900 

16,800

June 18

7.58 

7.5-4 

7.50 

7.47 

7.43 

7.35

12,200 

12,100 

12,000 

11,900 

11,800 

11,600

h^t | Discharge

May 20

9.57 

9.81 

10.07 

10.77 

10.79 

11.05

18,700 

19,600 

20,500 

23,000 

23,100 

24,000

May 26

11.28 

11.33 

11.27 

11.48 

11.29 

11.34

24,800 

25,000 

24,800 

25,600 

24,900 

25,100

Juns 1

10.65 

10.58 

10.51 

10.48 

10.36 

10.38

Ju

11.00 

10.95 

10.78 

10.73 

10.58 

10.56

22,600 

22,300 

22,100 

22,000 

21,500 

21,600

ne7

23,800 

23,700 

23,000 

22,900 

22,300 

22,300

June 13

8.95 

8.86 

8.79 

8.74 

8.66 

8.60

Ju

7.30 

7.25 

7.19 

7.14 

7.09 

7.08

16,600 

16,300 

16,100 

15,900 

15,600 

15,400

ne!9

11,400 

11,200 

11,100 

10,900 

10,800 

10,800

Gage 

height

Mi

11.09 

11.25 

11.50 

12.15 

12.47 

12.37

Discharge

iy21

24,200 

24,700 

25,600 

28,000 

29,300 

28,900

May 27

11.36 

11.42 

11.47 

11.40 

11.40 

11.38

Ju

10.35 

10.33 

10.22 

10.18 

10.16 

10.17

Ju

10.48 

10.38 

10.27 

10.23 

10.19 

10.06

Ju

8.57 

8.55 

8.48 

8.40 

8.34 

8.25

25,100 

25,400 

25,500 

25,300 

25,300 

25,200

ne2

21,500 

21,400 

21,000 

20,900 

20,800 

20,900

ne8

22,000 

21,600 

21,200 

21,100 

20,900 

20,500

ne 14

15,300 

15,300 

15,100 

14,800 

14,600 

14,300

June 20

7.05 

7.03 

7.01 

6.99 

6.96 

6.91

10,700 

10,600 

10,500 

10,500 

10,400 

10,300

Gage 

height Discharge

May 22

12.25 

12.07 

12.00 

12.30 

12.30 

12.20

Ma

11.32 

11.38 

11.39 

11.45 

11.53 

11.51

Ju

10.14 

10.20 

10.17 

10.16 

10.42 

10.58

Ju

10.02 

10.01 

9.80 

9.84 

9.76 

9.66

Ju

8.19 

8.08 

7.99 

8.05 

7.83 

7.78

28,400 

27,700 

27,500 

28,600 

28,600 

28,200

y28

25,000 

25,200 

25,200 

25,500 

25,700 

25,700

ne3

20,700 

21,000 

20,900 

20,800 

21,700 

22,300

ne9

20,300 

20,300 

19,500 

19,700 

19,400 

19,000

ne!5

14,100 

13,800 

13,500 

13,700 

13,000 

12,800

June 21

6.86 

6.83 

6.82 

6.80 

6.82 

6.84

10,100 

10,000 

10,000 

9,960 

10,000 

10,100

Supplemental record.- May 20, 3 p.m., 10.29 ft., 21,300 sec.-ft.; May 21, 2 p 

11.40 ft., 25,300 sec.-ft.; May 23, 10 a.m., 12.22 ft., 28,300 sec.-ft., 2 p.m. 

ft., 29,800 sec.-ft., 3 p.m., 13.07 ft., 31,500 sec.-ft., 6 p.m., 12.52 ft., 29 

sec.-ft.; June 15, 5" p.m., 7.70 ft., 12,600 sec.-ft.

12.62

500
PEND OREILLE RIVER BASIN 79

Clark Fork below Missoula, Mont.

Location.- Lat. 46°5Z', long. 1148 07', in SE£ sec. 21, T. 13 N., R. 20 W., 2 miles downstream from Bitterroot River and 6 miles west of Mlssoula.

Drainage area.- 8,690 square miles.

Qage-helght record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage 

heights used to hundredths.

Maxima.- May-June 1948: Discharge, 52,800 second-feet 6 to 7 p.m. May 23 (gage height,

 I2To"8 feet).

1929 to April 1948: Discharge, 45,900 second-feet May 10, 1947 (gage height, 11.18 

feet).

Remarks.- Some regulation by power plant at Bonner. Many diversions above station for 

irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

Msy

12,900

12,600

12,100

11,600

11,300

10,700

11,100

14,800

17,300

15,900

June

45,800

43,400

43,600

47)400

48,000

45,100

42,500

40,900

39,600

38,100

July

14,800

14,600

14,600

13,200

12,400

11,100

10,300

9,600

8,840

8,600

Day

11

12

13

14

15

16

17

18

19

20

May

15,800

14,900

14,700

15,800

16,800

16,700

17,400

21,000

26,900

33,900

June

35,600

34,200

31,800

29,900

27,100

24,900

24,700

23,400

21,300

20,700

July

7,280

7,690

7,590

7,010

6,590

6,200

6,410

5,480

6,100

5,980

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .... . ... . ... . ..... ............................ ......................

Runoff, in inches ............................................................................................................................

May

42,600

48,500

51,700

49,400

45,600

45,100

46,900

49,000

51,200

52,000

50,500

3.67

June

20,000

21,200

21,600

21,200

21,000

20,400

19,200

18,000

16,700

15,600

3.86

July

7,100

6,800

5,230

5,930

5,730

5,480

5,170

5,120

5,560

5,960

5,900

8 n7A

1.07

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

Jieight Discharge

May 17

6.34 

&.37 

6.42 

6.49 

6.59 

6.71

16,800 

17,000 

17,200 

17,500 

18,000 

18,500

May 23

11.90 

11.95 

11.97 

11.88 

12.02 

11.90

MJ

11.82 

11.84 

11.88 

11.90 

11.92 

11.94

Ju

11.23 

11.32 

11.44 

11.54 

11.54 

11.54

51,400 

51,800 

52,000 

51,200 

52,400 

51,400

iy29

50/800 

50,900 

51,200 

51,400 

51,600 

51,700

ne4

46,100 

45,800 

47,700 

48,500 

48,500 

48,500

June 10

10.21 

10.21 

10.14 

10.05 

9.98 

9.93

Ju

8.08 

8.02 

7.93 

7.93 

8.00 

8.01

38,800 

38,800 

38,300 

37,700 

37,200 

36,800

ne!6

25,300 

25,000 

24,500 

24,500 

24,900 

25,000

Gage 

height Discharge

May 18

6.85 

7.00 

7.20 

7.42 

7.65 

7.83

Me

11.84 

11.78 

11.69 

11.57 

11.45 

11.33

Mi

11.97 

11.98 

11.97 

11.95 

11.99 

11.97

Ju

11.54 

11.52 

11.52 

11.45 

11.37 

11.31

19,100 

19,800 

20,800 

21,900 

23,000 

24,000

iy24

50,900 

50,400 

49,700 

48,800 

47,800 

46,900

iy30

52,000 

52,000 

52,000 

51,800 

52,100 

52,000

ne 5-

48,500 

48,400 

48,400 

47,900 

47,200 

46,700

June 11

9.87 

9.82 

9.74 

9.68 

9.63 

9.59

36,400 

36,000 

35,500 

35,100 

34,800 

34,500

June 17

7.99 

7.97 

7.95 

7.97 

7.95 

7.91

Supplemental record.

52,800 sec. -ft.; May 2

24,800 

24,700 

24,600 

24,700 

24,600 

24,400

Gage

height

Me

8.02 

8.20 

8.37 

8.55 

8.68 

8.85

Discharge

y!9

25,000 

26,000 

25,900 

28,000 

28,800 

29,800

May 25

11.25 

11.18 

11.15 

11.11 

11.08 

11.06

Mi

11.92 

11.86 

11.81 

11.68 

11.64 

11.47

45,300 

45,800 

45,600 

45,200 

45,000 

44,800

iy31

51,60C 

51,100 

50,700 

49,600 

49,300 

48,000

June 6

11.22 

11.17 

11.09 

11.02 

10.97 

10.92

46,000 

45,700 

45,100 

44,600 

44,200 

43,800

June 12

9.58 

9.60 

9.58 

9.53 

9.46 

9.40

34,500 

34,600 

34,500 

34,100 

33,700 

33,300

June 18

7.85 

7.78 

7.71 

7.65 

7.58 

7.53

24,100 

23,700 

23,400 

23,000 

22,700 

22,400

Gage 

height Discharge

May 20

9.04 

9.25 

9.47 

9.70 

9.97 

10.15

31,000 

32,300 

33,800 

35,200 

37,100 

38,400

May 26

11.04 

11.07 

11.10 

11.09 

11.17 

11.1(7

44,700 

44,900 

45,200 

45,100 

45,700 

45,700

June 1

11.38 

11.27 

11.22 

11.11 

10.96 

10.98

47,200 

46,400 

46,000 

45,200 

44,100 

44,200

June 7

10.88 

10.82 

10.78 

10.72 

10.62 

10.60

Ju

9.34 

9.24 

9.14 

9.08 

9.05 

9.00

Ju

7.45 

7.38 

7.28 

7.20 

7.18 

7.18

43,500 

43,000 

42,800 

42,300 

41,600 

41,500

nelS

32,900 

32,300 

31,600 

31,200 

31,000 

30,700

ne 19

22,000 

21,700 

21,200 

20,800 

20,700 

20,700

height | Discharge

May 21

10.36 

10.57 

10.80 

10.96 

11.15 

11.15

39,800 

41,300 

42,900 

44,100 

45,500 

45,500

May 27

11.25 

11.30 

11.33 

11.44 

11.40 

11.43

46,300 

46,600 

45,900 

47,700 

47,400 

47,600

June 2

10.95 

10.90 

10.86 

10.82 

10.77 

10.80

Ju

10.60 

10.58 

10.54 

10.48 

10.42 

10.39

Ju

8.97 

8.94 

8.89 

8.82 

8.76 

8.69

44,000 

43,600 

43,400 

43,000 

42,700 

42,900

ne8

41,500 

41,400 

41,100 

40,700 

40,200 

40,000

ne 14

30,500 

30,300 

30,000 

29,600 

29,300 

28,800

June 20

7.19 

7.21 

7.17 

7.17 

7.15 

7.11

20,800 

20,800 

20,600 

20,600 

20,600 

20,400

Gage 

height Discharge

May 22

11.31 

11.37 

11.48 

11.64 

11.87 

11.89

46,700 

47,200 

48,000 

49,300 

51,200 

51,300

May 28

11.49 

11.56 

11.60 

11.65 

11.70 

11.77

48,100 

48,700 

49,000 

49,400 

49,800 

50,400

JuneS

10.81 

10.85 

10.87 

10.90 

10.99 

11.08

Ju

10.38 

10.37 

10.37 

10.29 

10.26 

10.23

Ju

8.60 

8.50 

8.38 

8.36 

8.20 

8.15

43,000 

43,300 

43,400 

43,500 

43,300 

45,000

ne9

40,000 

39,900 

39,900 

39,300 

39,100 

38,900

nel5

28,300 

27,700 

27,000 

26,900 

26,000 

25,700

June 21

7.05 

7.03 

7.02 

7.02 

7.03 

7.07

20,000 

20,000 

19,900 

19,900 

20,000 

20,200

- May 23, 2 p.m., 11.80 ft., 50,600 sec. -ft., 6 p.m., 12.08 ft., 

3, 6 p.m., 11.04 ft., 44,700 sec. -ft.; May 31, 6 a.m., 12.02 ft.,

52,400 sec.-ft.
80 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Clark Pork at Tarkio, Mont.

Location^- Lat. 47°01', long. 114°44', In NE£ sec. 34, T. 15 N., R. 25 W., a quarter of 

a mile west of Tarkio, l{ miles upstream from Quartz Creek, and 3-£ miles downstream 

from Pish Creek.

Drainage area.- 9,630 square miles. '

Page-height record.- Graph constructed from once-daily gage readings and compared with 

water-stage recorder graph for stations below Mlssoula and at St. Regls. No gageheight record May 20, June 12.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Gage heights used to hundredths. Shifting-control method used July 5-31. Discharge 

for days of no gage-height record computed on basis of records for stations below 

Mlssoula and at St. Regls.

Maxima.- May-June 1948: Discharge, 63,200 second-feet 12 p.m. May SO (gage height, 

30.35 feet, from graph based on gage readings).

1944 to April 1948: Discharge observed, 57,200 second-feet May 10, 1947 (gage 

height, 27.60 feet).

Remarks.- Some regulation by power plant at Bonner. Many diversions above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

15,500

15,500

14,600

13,700

13,300

13,200

13,400

15,800

19,700

20,000

June

57,600

54,300

53,300

55,200

57,900

55,800

52,400

49,600

46,900

45,200

July

16,200

15,600

15,600

14,600

13,500

12,600

11,800

10,900

10,100

9,580

Day

11

12

13

14

15

16

17

18

19

an

May

19,000

18,100

17,700

18,300

19,400

19,300

20,000

23,100

29,200

38,100

June

42,700

39,000

37,400

35,000

32,200

29,300

28,100

27,000

24,200

22,800

July

8,460

8,250

8,460

8,080

7,830

7,250

6,870

6,580

6,870

7,360

Day

21

22

23

24

25

26

27

28

29

so

31

Runoff, in inches ............................................................................................................................

May

49,100

57,100

62,300

62,300

60,400

56,800

57,600

59,800

62,000

63,000

62,200

3.98

June

22,000

22,100

23,700

22,600

22,600

22,300

21,000

19,700

18,400

17,200

4.08

July

7,660

7,520

7,030

6,580

6,390

6,190

5,920

5,830

6,090

6,390

6,640

1.08

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

13.- 68 

13.71 

13.80 

14.00 

14.20 

14.42

ME

29.76 

30.00 

30.12 

30.20 

30.24 

30.22

M

29.72 

29.87 

30.01 

30.09 

30.13 

30.18

Ju

27.33 

27.45 

27.58 

27.73 

28.05 

28.46

19,600 

19,700

19,800 

20,200 

20,600 

21,000

iy23

61,500 

62,200 

62,600 

62,800 

62,900 

62,900

iy29

61,400 

61,800 

62,200 

62,500 

62,600 

62,700

ne 4

54,200 

54,600 

54,900 

55,400 

56,400 

57,600

June 10

24.32 

24.25 

24.16 

24.06 

23.93 

23.77

Ju

18.39 

18.22 

18.06 

17.90 

17.74 

17.58

45,700 

45,500 

45,200 

45,000 

44,600 

44,200

nel6

30,100 

29,7OO 

29,300 

29,000 

28,600 

28,200

Gage 

height Discharge

May 18

14.68 

14.98 

15.32 

15.70 

1-6.13 

16.57

Mi

30.17 

30.10 

30.04 

29.96 

29.88 

29.78

M

30.22 

30.24 

30.27 

30.31 

30.33 

30.35

Ju

28.58 

28.61 

28.60 

28.59 

28.56 

28.51

Ju

23.61 

23.44 

23.27 

23.05 

22.83 

22.56

21,600 

22,200 

22,900 

23,700 

24,700 

25,800

iy24

62,700 

62,500 

62,300 

62,100 

61,800 

61,500

iy30

62,900 

62,900 

63,000 

63,100 

63,200 

63,200

ne 5

57,900 

58,000 

58,000 

58,000 

57,900 

57,700

ne 11

43,700 

43,200 

42,800 

42,100 

41,600 

40,900

June 17

17.50 

17.54 

17.62 

17.60 

17.55 

17.50

28,000 

28,100 

28,300 

28,200 

28,100 

28,000

Gage 

height Discharge

May 19

17.03 

17.52 

18.00 

18.50 

19.00 

19.52

26,900 

28,000 

29,200 

30,400 

31,600 

33,000

May 25

29.67 

29.56 

29.45 

29.33 

29.13 

28.89

Mi

30.30 

30.23 

30.10 

29.89 

29.60 

29.30

Ji

28.34 

28.12 

27.91 

27.65 

27.41 

27.18

61,200 

60,900 

60,600 

60,200 

59,600 

58,900

iy31

63,100 

62,900 

62,500 

61,900 

61,000 

60,100

ne6

57,200 

56,600 

55,900 

55,200 

54,400 

53,700

June 12

22.27 

21.94 

21.70 

21.62 

21.59 

21.55

40,100 

39,200 

38,600 

38,400 

38,300 

38,200

June 18

17.45 

17.36 

17.14 

16.90 

16.70 

16.49

27,900 

27,700 

27,100 

26,600 

26,100 

25,600

Gage 

height Discharge

May 20

20.04 

20.58 

21.27 

22.22 

23.12 

23.85

34,300 

35,700 

37,500 

40,000 

42,300 

44,400

May 26

28.59 

28.30 

28.05 

27.95 

27.93 

27.99

58,000 

57,100 

56,400 

56,000 

56,000 

56,200

June 1

29.00 

28.70 

28.44 

28.21 

27.98 

27.80

59,200 

58,300 

57,500 

56,800 

56,100 

55,600

June 7

27.02 

26.85 

26.70 

26.57 

26.42 

26.21

Ju

21.52 

21.39 

21.23 

21.06 

20.90 

20.75

53,300 

52,800 

52,400 

52,000 

51,600 

51,000

ne!3

38,200 

37,800 

37,400 

37,000 

36,500 

36,200

June 19

16.25 

16.02 

15.82 

15.70 

15.60 

15.51

25,000 

24,400 

24,000 

23,700 

23,500 

23,300

Gage 

height Discharge

May 21

24.51 

25.10 

25.62 

26.05 

26.53 

26.98

46,200 

47,900 

49,300 

50,500 

51,900 

53,100

May 27

28.12 

28.27 

28.46 

28.63 

28.76 

28.86

56,600 

57,000 

57,600 

58,100 

58,500 

58,800

June 2

27.62 

27.46 

27.32 

27.19 

27.11 

27.05

55,100 

54,600 

54,200 

53,800 

53,500 

53,400

June 8

25.97 

25.78 

25.67 

25.59 

25.50 

25.36

Ju

20.60 

20.45 

20.30 

20.13 

19.97 

19.81

50,300 

49,800 

49,500 

49,300 

49,000 

48,500

ne 14

35,800 

35,400 

35,000 

34,500 

34,100 

33,700

June 20

15.43 

15.36 

15.28 

15.20 

15.13 

15.07

23,100 

23,000 

22,800 

22,600 

22,500 

22,400

Gage 

height

M

27.42 

27.87 

28.32 

28.73 

29.12 

29.46

Discharge

iy22

54,500 

55,800 

57,200 

58,400 

59,600 

60,600

May 28

28.96 

29.05 

29.17 

29.29 

29.43 

29.58

Ju

27.00 

26.97 

26.95 

26.99 

27.08 

27.21

Jl

25.13 

24.93 

24.64 

24.49 

24.42 

24.37

59,100 

59,400 

59,700 

60,100 

60,500 

60,900

me 3

53,200 

53,100 

53,100 

53,200 

53,400 

53,800

ne9

48,000 

47,400 

46 , 600 

46,200 

46,000 

45,800

June 15

19.62 

19.42 

19.22 

19.00 

18.80 

18.57

33,200 

32,700 

32,200 

31,600 

31,100 

30,600

June 21

15.01 

14.93 

14.85 

14.80 

14.77 

14.74

22,200 

22,100 

21,900 

21,800 

21,700 

21,700
FEND OREILLE RIVER BASIN 81

Clark Pork at St. Regls, Mont.

Location.- Lat. 47°18', long. 115°05', In SW| sec. 19, T. 18 N., R. 27 W., at St. Regls,

half a mile downstream from St. Regls River. (See pi. 10A.) 

Drainage area.- 10,500 square miles. 

Gage-height "record.- Water-stage recorder graph except for period 8 a.m. May 22 to

10 a.m. May 28 for which a graph was drawn based on fragmentary record and observer's

observations. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

67,400 second-feet and extended to peak stage. Gage heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 68,900 second-feet noon May 24 (gage height, 19.96

feet, from graph based on gage readings).

1910-23, 1929 to April 1948: Discharge, 62,800 second-feet May 30, 31, 1913

(gage height, 19.1 feet). 

Remarks.- Many diversions above station. Some regulation. Rating curve changed at

peak stage.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

18,500

18,600

17,700

16,900

16,500

16,100

17,100

19,600

23,200

23,600

JuiTe

63,700

59,200

58,000

59,703

62,500

60,500

57,100

54,100

51,800

50,300

July

18,600

17,800

17,600

16,900

15,300

14,300

13,100

12,300

11,500

11,100

Day

11

12

13

14

15

16

17

18

19

20

May

22,400

21,500

21,500

22,400

23,300

23,800

24,600

27,600

33,100

41,100

June

47,500

44,200

41,700

38,700

36,100

33,400

32,600

31,400

29,200

27,100

July

10,100

9,400

9,630

9,240

8,740

8,360

8,070

7,930

7,120

8,510

Day

21

22

23

24

25

26

27

28

29

SO

31

Monthly mean discharge, in second-feet ......... ................... .. ...............................................

Runoff, in inches ............................................................................................................................

May

50,600

60,200

65,600

68,100

64,300

61,900

63,200

66,900

68,000

67,600

67,200

37,180

4.08

June

26,300

25,800

26,800

26,200

25,900

25,200

24,200

22,600

21,100

19,800

39,420

4.18

July

8,640

8,540

8,050

7,540

7,260

7,050

6,780

6,670

6,870

7,030

7,190

10,230

1.12

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

Lheight Discharge

May 17

12.06 

12.12 

12.13 

12.16 

12.23 

12.41

Ms

19.28 

19.41 

19.52 

19.62 

19.72 

19.79

M:

19.76 

19.81 

19.86 

19.91 

19.88 

19.86

Jll

18.54 

18.54 

18.60 

18.70 

18.83 

18.96

24,200 

24,400 

24,500 

24,600 

24,900 

25,700

iy23

64,100 

65,000 

65,700 

66,400 

67,100 

67,600

iy29

67,400 

67,800 

68,200 

68,500 

68,300 

68,200

ne 4

58,900 

58,900 

59,300 

60,000 

60,900 

61,800

June 10

17.39 

17.38 

17.25 

17.13 

17.04 

16.98

Ju

14.26 

14.16 

14.08 

13.98 

14.03 

14.00

51,200 

51,200 

50,400 

49,700 

49,100 

48,800

ne!6

34,100 

33,700 

33,300 

32,800 

33,000 

32,900

Gage 

height Discharge

May 18

12.61 

12.76 

12.89 

13.02 

13.16 

13.37

26,600 

27,200 

27,800 

28,400 

29,000 

30,000

May 24

19.86 

19.92 

19.96 

19.87 

19.75 

19.63

M:

19.86 

19.84 

19.76 

19.72 

19.73 

19.78

68,200 

68,600 

68,900 

68,200 

67,400 

66,500

iy30

68,200 

68,000 

67,400 

67,100 

67,200 

67,600

June 5

19.08 

19.12 

19.09 

19.06 

19.03 

19.03

62,700 

62,900 

62,700 

62,500 

62,300 

62,300

June 11

16.92 

16.85 

16.79 

16.66 

16.61 

16.51

48,400 

48,000 

47,600 

46,900 

46,600 

46,000

June 17

13.97 

13.99 

13.95 

13.89 

13.85 

13.82

32,800 

32,900 

32,700 

32,400 

32,200 

32,100

Gage 

height Discharge

. May 19

13.61 

13.84 

14.03 

14.23 

14.44 

14.72

31,100 

32,200 

33,000 

34,000 

35,000 

36,400

May 25

19.52 

19.40 

19.30 

19.20 

19.14 

19.09

Ml

19.80 

19.80 

19.75 

19.68 

19.61 

19.59

65,700 

64,900 

64,200 

63,500 

63,100 

62,700

iy31

67,700 

67,700 

67,400 

66,900 

66,400 

66,200

June 6

19.00 

18.88 

18.76 

18.61 

18.55 

18.55

Ju

16.41 

16.31 

16.19 

16.10 

16.04 

16.01

62,100 

61,300 

60,400 

59,400 

59,000 

59,000

ne!2

45,400 

44,800 

44,100 

43,500 

43,200 

43,000

June 18

13.80 

13.77 

13.70 

13.63 

13.54 

13.44

32,000 

31,800 

31,500 

31 , 200 

30,800 

30,300

height l 0*^

May 20

15.01 

15.34 

15.65 

15.94 

16.21 

16.50

37,800 

39,500 

41,100 

42,600 

44,200 

45,900

May 26

19.05 

19.01 

18.97 

18.93 

18.90 

18.90

Ju

19.53 

19.39 

19.27 

19.06 

18.93 

18.88

Ju

18.49 

18.39 

18.26 

18.13 

18.09 

18.10

62,400 

62,200 

61 , 900 

61,600 

61,400 

61,400

ne 1

65,800 

64,800 

64,000 

62,500 

61,600 

61,300

ne7

58,500 

57,800 

56,900 

5&,000 

55,800 

SffjSOD

June 13

15.93 

15.85 

15.78 

15.72 

15.60 

15.47

42,600 

42,100 

41,800 

41,400 

40,800 

40,200

June 19

13.38 

13.31 

13.21 

13.11 

12.^9 

12.88

30,000 

29,700 

29,200 

28,800 

28,300 

27,800

Gage 

height

M!

16.78 

17.04 

17.28 

17.48 

17.75 

18.07

Discharge

iy21

47,600 

49,100 

50,600 

51,800 

53,600 

55,700

May 27

18.95 

19.02 

19.12 

19.25 

19.42 

19.58

61,800 

62,200 

62,900 

63,800 

65,000 

66,200

June 2

18.82 

18.68 

18.52 

18.41 

18.42 

18.45

Ju

18.01 

17,89 

17.79 

17.68 

17.69 

17.70

60,800 

59,900 

58,700 

58,000 

58,000 

58,200

ne8

55,300 

54,500 

53,800 

53,100 

53,200 

53,200

June 14

15.38 

15.28 

15.17 

15.08 

15.01 

14.96

39,700 

39,200 

38,600 

38,200 

37,800 

37,600

June 20

12.80 

12.74 

12.71 

12.70 

12.68 

12.67

27,400 

27,100 

27,000 

27,000 

26,900 

26,800

Gage 

height Discharge

May 22

18.40 

18.64 

18.77 

18.91 

19.04 

19.17

57,900 

59,600 

60,500 

61,500 

62,400 

63,300

May 28

19.69 

19.74 

19.71 

19.66 

19.66 

19.72

Ju

18.44 

18.39 

18.34 

18.39 

18.45 

18.53

Ju

17.65 

17.54 

17.43 

17.33 

17.32 

17.40

66,900 

67,300 

67,100 

66,700 

66,700 

67,100

ne3

58,200 

57,800 

57,500 

 57,800 

58,200 

58,800

ne9

52,900 

52,200 

51,500 

50,900 

50,800 

51,300

June 15

14.88 

14.78 

14.67 

14.54 

14.42 

14.30

37,200 

36,700 

36,200 

35,500 

34,900 

34,300

June 21

12.65 

12.62 

12.58 

12.51 

12.46 

12.41

26,700 

26,600 

26,400 

26,100 

25,900 

25,700
82 FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Clark Pork near Plains, Mont.

Location.- Lat. 47 C 26', long. 114°51', on lot 7, SW£ sec. 1, T. 19 N., R. 26 W., 2 miles 

upstream from Plains and 6 miles downstream from Plathead River. Datum of gage is 

2,499.34 feet above mean sea'level, datum of 1929 (levels by Corps of Engineers). 

(See pi. 10B.)

Drainage area.- 19,900 square miles.

Page-height record.- Water-stage recorder graph except parts of July 20-24, for which 

gage heights were partly estimated.

Discharge record.- Stage-discharge relation defined by current-meter measurements. Oage 

heights used to hundredths.

Maxima.- May-June 1948: Discharge, 134,000 second-feet 1:30 p.m. June 5 (gage height,

 I9TT7 feet).

1910 to April 1948: Discharge, 126,000 second-feet May 28, 1928 (gage height, 

18.4 feet).

Remarks.- Many diversions above station for irrigation. Some regulation by Plathead

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

35,600

37,400

37,900

37,600

37,600

38,000

39,200

42,500

48,100

50,000

June

132,000

129,000

129,000

131,000

133,000

132,000

130,000

128,000

125,000

124,000

July

31,400

26,000

25,100

24,900

23,800

22,900

22,000

21,300

20,600

18,200

Day

11

12

13

14

15

16

17

18

19

20

May

49,600

48,900

48,700

49,600

51,000

52,200

52,900

56,300

62,900

73,800

June

122,000

118,000

113,000

108,000

104,000

99,200

96,600

94,000

89,900

85,200

July

18,200

21,000

24,700

24,800

24,300

20,100

16,100

16,500

16,300

17,800

Day

21

22

23

24

25

26

27

28

29

80

31

Runoff, in inches ............................................................................................................................

May

87,400

100,000

109,000

114,000

117,000

J.18,000

122,000

127,000

130,000

132,000

133,000

4.18

June

82,300

79,900

79,300

77,700

76,000

74,200

71,500

68.400

64,500

52,600

5.70

July

23,200

24,300

24,100

21,200

16,800

15,300

15,000

15,000

19,200

22,800

23,800

1.22

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

11.35 

11.37 

11.38 

11.40 

11.43 

11.50

52,600 

52,800 

52,900 

53,000 

53,300 

53,900

May 23

16.77 

16.90 

16.98 

17.07 

17.20 

17.31

Mi

18.76 

18.82 

18.86 

18.91 

18.94 

18.97

106,000 

108,000 

109,000 

110,000 

111,000 

112,000

iy29

129,000 

130,000 

130,000 

131,000 

131,000 

131,000

June 4

18.83 

18.87 

18.90 

18.92 

18.97 

19.03

130,000 

130,000 

131,000 

131,000 

131,000 

132,000

June 10

18.45 

18.40 

18.32

Ju

16.43 

16.30 

16.20

124,000 

124,000 

123,000

nel6

99,900 

98,500 

97,400

£& \ Discharge

May 18

11.57 

11.67 

11.79 

11.86 

11.95 

12.06

Mi

17.39 

17.44 

17.50 

17.55 

17.56 

17.59

M

19.01 

19.01 

19.03 

19.04 

19.04 

19.05

Ju

19.08 

19.13 

19.16 

19.16 

19.15 

19.13

Ju

18.27 

18.20 

18.09

54,500 

55,400 

56,500 

57,100 

57,900 

58,900

iy24

113,000 

114,000 

114,000 

115,000 

115,000 

115,000

132,000 

132,000 

132,000 

132,000 

132,000 

132,000

ne5

133,000 

133,000 

134,000 

134,000 

134,000 

133,000

nell

122,000 

121,000 

120,000

June 17

16.15 

16.12 

16.03

96,800 

96,500 

95,500

Gage 

height Discharge

May 19

12.19 

12.33 

12.48 

12.61 

12.79 

12.95

60,100 

61,400 

62,900 

64,100 

65,800 

67,400

May 25

17.65 

17.72 

17.76 

17.77 

17.75 

17.75

Mi

19.06 

19.07 

19.08 

19.07 

19.06 

19.06

116,000 

117,000 

117,000 

117,000 

117,000 

117,000

iy31

J33.000 

133,000 

133,000 

133,000 

133,000 

133,000

June 6

19.11 

19.09 

19.07 

19.05 

18.99 

18.96

133,000 

133,000 

133,000 

132,000 

131,000 

131,000

June 12

17.97 

17.84 

17.72

118,000 

117,000 

115,000

June 18

15.96 

15.85 

15.71

94,800 

93,600 

92,000

Gage 

height Discharge

May 20

13.14 

13.37 

13.60 

13.76 

14.00 

14.38

69,300 

71,600 

73,900 

75,500 

77,900 

81,700

May 26

17.80 

17.85 

17.89 

17.92 

17.92 

17.92

Ju

19.06 

19.04 

19.01 

18.97 

18.93 

18.90

Ju

18.95 

18.92 

18.89 

18.85 

18.80 

18.78

Ju

17.64 

17.52 

17.39

118,000 

118,000 

119,000 

119,000 

119,000 

119,000

me 1

133,000 

132,000 

132,000 

131,000 

131,000 

131,000

ne7

131,000 

131,000 

130,000 

130,000 

129,000 

129,000

nel3

114,000 

113,000 

111,000

June 19

15.59 

15.47 

15.29

90,700 

89,400 

87,400

height

M

14.% 62 

14.80 

14.97 

15.12 

15.28 

15.48

Discharge

iy21

84,100 

85,900 

87,600 

89,100 

90,700 

92,700

May 27

18.08 

18.17 

18.20 

18.24 

18.28 

18.36

Ju

18.88 

18.85 

18.83 

18.77 

18.71 

18.72

Ju

18.75 

18.71 

18.70 

18.65 

18.61 

18.60

Ju

17.22 

17.09 

16.96

Ju

15.15 

15.02 

14.93

121,000 

122,000 

122,000 

123,000 

123,000 

124,000

ne2

130,000 

130,000 

130,000 

129,000 

128,000 

128,000

ne8

128,000 

128,000 

128,000 

127,000 

127,000 

126,000

ne 14

109,000 

108,000 

106,000

ne20

85,800 

84,400 

83,400

Oj£| Discharge

May 22

15.78 

16.06 

16.25 

16.37 

16.50 

16.67

95,700 

98,700 

101,000 

102,000 

104,000 

105,000

May 28

18.48 

18.59 

18.65 

18.67 

18.69 

18.72

.Ju

18.73 

18.75 

18.73 

18.73 

18.76 

18.79

Ju

18.59 

18.55 

18.54 

18.48 

18.43 

18.46

126,000 

127,000 

128,000 

128,000 

128,000 

128,000

ne3

129,000 

129,000 

129,000 

129,000 

129,000 

129,000

ne9

126,000 

126,000 

126,000 

125,000 

124,000 

125,000

June 15

16.85 

16.73 

16.55

Ju

14.88 

14.78 

14.69

105,000 

103,000 

101,000

ne21

82,900 

81,900 

81,000

Supplemental record.- June 5, 1:30 p.m., 19.17 ft., 134,000 sec.-ft.
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 10

A. U. S. HIGHWAY 10 NEAR SUPERIOR. 

Courtesy of H. H. Kuphal, Montana State Highway Department.

B. U. S. HIGHWAY 10A AT PERMA. 

Courtesy of H. H. Kuphal, Montana State Highway Department.

FLOOD SCENES ON CLARK FORK IN MONTANA.

FEND OREILLE RIVER BASIN 83

Clark Pork near Heron, Mont.

Location.- Lat. 48°04', long. 115°59', in sec. 28, T. 27 N., R. 34 W., 600 feet upstream 

from Dead Horse Creek and lj miles northwest of Heron.

Drainage area.- 21,800 square miles.

Gage-height record.- Water-stage recorder graph except for period 8 a.m. June 8 to 7 p.m. 

June 14, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used June 14 to July 31. Discharge for period of no gageheight record computed on basis of records for station at St. Regis and Plathead 

River near Poison.

Maxima.- May-June 1948: Discharge, 153,000 second-feet 4 p.m. May 29 to noon June 1; 

gage height, 50.97 feet 1 a.m. May 31.

1928 to April 1948: Discharge, 137,000 second-feet June 17, 1933 (gage height, 

46.62 feet, present datum).

Discharge known, 195,000 second-feet June 1894 (gage height, 59.1 feet, present 

datum, from floodmark an eighth of a mile downstream).

Remarks.- Some regulation by Plathead Lake. Diversions from tributaries above station 

for Irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

42,600

44,600

45,200

45,300

44,900

45,200

46,900

50,800

54,900

58,300

June

152,000

150,000

147,000

148,000

150,000

151,000

149,000

146,000

142,000

139,000

July

51,300

34,800

31,300

30,100

29,100

27,700

26,700

25,600

24,700

23,800

Day

11

12

13

14

15

16

17

18

19

20

May

58,400

57,700

58,100

59,500

60,000

61,100

62,800

66,400

72,200

83,300

June

137,000

134,000

129,000

124,000

118,000

114,000

110,000

107,000

103,000

98,100

July

21,400

21,100

24,900

27,200

27,100

26,300

21,800

18,500

19,000

18,700

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet

Runoff, in inches .............................................. ........... . ................................................

May

98,900

114,000

126,000

132,000

138,000

140,000

144,000

148,000

152,000

153,000

153,000

4.46

June

93,600

90,200

88,000

87,000

84,900

82,700

80,200

76,800

73,200

68,000

5.92

July

20,800

25,700

26,200

25,600

21,800

18,300

17,200

17,000

17,100

22,200

25,000

1.31

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

29.35 

29.39 

29.54 

29.72

29.97

61,900 

62,100 

62,600 

63,300

64,300

May 23

44.70 

45.36 

45.76

M

5O.60 

50.80 

50.85

126,000 

128,000 

130,000

iy29

152,000 

153,000 

153,000

June 4

49.52 

49.72 

49.88

147,000 

148,000 

148,000

June 10

Ju

42.14 

41.75 

41.48

ne 16

114,000 

113,000 

112,000

Gage 

height Discharge

May 18

30.28 

30.71 

31.16

65,500 

67,200 

69,000

May 24

46.14 

46.46 

46.82

132,000 

133,000 

135,000

May 30

50.90 

50.96

Ju

50.09 

50.30 

50.55

153,000 

153,000

ne 5

149,000 

150,000 

151,000

June 11

June 17

41.19 

40.96 

40.82

110,000 

109,000 

109,000

Gage 

height Discharge

May 19

31.65 

31.86 

32.16

33.00

71,000 

71,800 

73,000

76,400

May 25

47.20

47.46 

47.71 

47.87

M;

50.85 

50.83

Jl

50.60 

50.54 

50.40

137,000

138,000 

139,000 

140,000

iy31

153,000 

153,000

ne 6

152,000 

151,000 

151,000

June 12

June 18

40.72 

40.61 

40.46

40.21 

40.16'

108,000 

108,000 

107,000

106,000 

106,000

Gage 

height Discharge

May 20

33.47 

34.07

35.27 

35.98 

36.62

78,300 

80,700

85,600 

88,500 

91,200

May 26

47.98

48.04 

48.10

48.36

Ju

50.85 

50.85 

50.78

50.68

Ju

50.00 

49.70

140,000

140,000 

140,000

142,000

ne 1

153,000 

153,000 

152,000

152,000

ne 7

149,000 

148,000

June 13

June 19

39.98 

39.69

39.31 

38.96

105,000 

104,000

102,000 

101,000

Gage 

height Discharge

May 21

37.91 

39.08 

40.28

96,500 

101,000 

107,000

May 27

48.68 

49.27

143,000 

146,000

June 2

50.44 

50.10 

49.85

Ju

49.40

151,000 

149,000 

148,000

ne8

146,000

June 14

43.92 

43.73

122,000 

121,000

June 20

38.58 

38.19 

37.74

98,900 

97,300 

95,400

Gage 

height

Mi

41.44 

42.65 

43.69

Discharge

iy22

112,000 

117,000 

121,000

May 28

49.72 

50.05 

50.37

Ju

49.60 

49.42 

49.50

Ju

148,000 

149,000 

151,000

ne3

147,000 

146,000 

147,000

ne9

June 15

43.01 

42.87

42.53

118,000 

118,000

116,000

June 21

37.45 

37.34 

37.19 

37.01 

36.96

94,200 

93,700 

93,100 

92,300 

92,100
84 FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Pend Oreille Lake at Hope, Idaho

Location.- Lat. 48°15 I , long. 116°18', in lot 2, sec. 35, T. 57 H., R. 1 E., at floating 

dock near Northern Pacific Railway station at Hope. Datum of gage is 2,000.00 feet 

above mean sea level, datum of 1929.

Drainage area.- 22,900 square miles.

Gage-height record.- Water-stage recorder graph.

Maxima.- May-June 1948; Gage height, 71.82 feet 6 to 9 p.m.

 T921 to April 1948: Gage height, 68.78 feet June 21, 1933. 

Stage known, 76.08 feet June 1894.

Remarks.- Diversions from tributaries of Clark Pork for irrigation. Since 1938 inflow 

affected by Flathead Lake.

June 9.

Stage known, 76.08

Mean gage height, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

54.62

54.83

55.03

55.23

55.41

55.57

55.75

56.01

56.29

56.62

June

70.21

70.60

70.92

71.15

71.35

71.55

71.71

71.77

71.80

71.79

July

63.25

62.30

61.28

60.30

59.50

58.75

58.07

57.41

56.81

56.26

Day

11

12

13

14

15

16

17

18

19

20

May

56.95

57.22

57.51

57.77

58.02

58.22

58.45

58.69

58.99

59.48

June

71.68

71.60

71.38

71.11

70.77

70.42

70.03

69.60

69.15

68.70

July

55.75

55.26

54.84

54.56

54.34

54.13

53.89

53.59

53.31

53.12

Day

21

22

23

24

25

26

27

28

29

30

31

May

60.25

61.21

62.38

63.66

64.73

65.72

66.65

67.52

68.40

69.11

69.71

June

68.18

67.66

67.13

66.62

66.16

65.72

65.28

64.82

64.35

63.90

July

52.84

52.72

52.70

52.64

52.52

52.34

52.16

51.99

51.80

51.71

51.71
PEND OREILLE RIVER BASIN

Fend Oreille River below Z Canyon, near Metaline Falls, Wash. 

(International gaging station)

Location.- Lat. 48 0 59', long. 117°21', in lot 2, sec. 11, T. 40 N., R. 43 E., threequarters of a mile downstream from Z Canyon, 1-J miles south of International boundary, 5 miles downstream from Slate Creek, and 10 miles downstream from Metaline Palle. 

Datum of gage Is 1,721.80 feet above mean sea level, datum of 1929 (levels by Corps 

of Engineers).

Drainage area.- 25,200 square miles; 22,900 square miles affected by natural storage in 

Pend Oreille Lake.

Page-height record.- Water-stage recorder graph except for period noon June 16 to July 6.

Discharge record.- Stage-discharge relation defined by current-meter measurements. Discharge for period of no gage-height record was computed on basis of staff-gage 

readings for Pend Oreille River at Priest River, Idaho, furnished by Corps of Engineers. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 171,300 second-feet 3:30 p.m. June 13 (gage height, 

60.25 feet).

1912 to April 1948: Discharge, 139,000 second-feet June 16, 1913 (gage height, 

41.2 feet, site and datum then in use).

Remarks.- Some regulation by Plathead Lake. Many small diversions from upper tributaries 

for irrigation.

This is one of the international gaging stations maintained by the United States 

under agreement with Canada. Records provisional, subject to revision. 

Mean discharge, in second-feet, 19^8

Day

1

2

3

4

5

6

7

8

9

10

May

44,700

45,400

46,600

48 , 800

49,900

51,200

52,800

54,000

56,000

57,600

June

145,400

149,700

153,400

152,100

153,200

154,100

156,300

160,100

163,600

166,600

July

103,000

99,000

94,000

89,000

85,000

80,000

74,200

70,500

66,000

62,100

Day

11

12

13

14

15

16

17

18

19

20

May

59,100

61,000

63,600

65,300

66,500

68,300

69,800

70,800

72,500

75,400

June

169,200

171,000

171,100

170,600

169,300

168,000

168,000

164,000

160,000

156,000

July

58,500

54,800

51,500

48,900

46,700

45,300

43,600

42,200

40,600

39,000

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .......... ..................................................

Runoff, in inches .................................................. . .......................................................................

May

78,400

82,300

88,400

95,500

102,700

110,000

116,900

123,100

127,400

132,900

139,700

76,660

3.51

June

151,000

146,000

141,000

137,000

132,000

127,000

122,000

117,000

113,000

108,000

150,500

6.66

July

37,600

36,400

35,500

34,500

33,900

33,500

32,800

32,000

31,200

30,200

29,500

53,580

2.45

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

31.17 

31.24 

31.29 

31.34 

31.42 

31.45

69,500 

69,700 

69,800 

70,000 

70,200 

70,300

May 23

36.60 

36.97 

37.37 

37.81 

38.19 

38.53

M:

49.74 

49.89 

50.09 

50.35 

50.60 

50.91

86,000 

87,200 

88,400 

89,700 

90,900 

91,900

iy29

126,100 

126,600 

127,200 

128,000 

128,800 

129,800

June 4

56.40 

56.36 

56.43 

56.47 

56.51 

56.56

151,900 

151,700 

152,000 

152,200 

152,400 

152,600

June 10

59.20 

59.30 

59.36 

59.40 

59.47 

59.54

165,900 

166,400 

166,700 

166,900 

167,300 

167,600

June 16

59.64 

59.61 

59.60

168,200 

168,000 

168,000

Gage 

height Discharge

May 18

31.50 

31.54 

31.62 

31.67 

31.73 

31.82

70,500 

70,600 

70,800 

71,000 

71,200 

71,500

May 24

38.95 

39.32 

39.69 

40.08 

40.50 

40.86

M

51.22 

51.51 

51.81 

52.09 

52.41 

52.70

Ju

56.62 

56.66 

56.70 

56.72 

56.72 

56.74

93,200 

94,300 

95,500 

96,600 

97,900 

99,000

iy30

130,800 

131,800 

132,900 

133,900 

135,100 

136,200

ne5

152,900 

153,100 

153,300 

153,400 

153,400 

153,500

June 11

59.64 

59.75 

59.85 

59.99 

60.04 

60.09

168,200 

163,700 

169,300 

170,000 

170,200 

170,500

June 17

Gage 

height Discharge

May 19

31.91 

32.01 

32.14 

32.25 

32.44 

32.64

71,700 

72,000 

72,400 

72,800 

73,300 

74,000

May 25

41.23 

41.61 

42.00 

42.47 

42.93 

43.35

100,200 

101,300 

102,500 

103,900 

105,300 

106,600

May 31

53.10 

53.35 

53.60 

53.87 

54.11 

54.38

Jl

56.77 

56.76 

56.84 

56.91 

56.98 

57.01

137,700 

138,700 

139,700 

140,800 

141,800 

142,900

ne6

153,700 

153,600 

154,000 

154,300 

154,700 

154,800

June 12

60.11 

60.20 

60.20 

60.20 

60.20 

60.20

170,600 

171,100 

171,100 

171,100 

171,100 

171,100

June 18

Gage 

height Discharge

May 20

32. -83 

32.96 

33.07 

33.22 

33.42 

33.70

74,500 

74,900 

75,300 

75,700 

76,300 

77,200

May 26

43.70 

44.06 

44.42 

44.81 

45.23 

45.65

Ju

54.59 

54.81 

55.00 

55.19 

55.34 

55.50

Jb

57.10 

57.20 

57.28 

57.41 

57.54 

57.67

107,700 

108,800 

109,900 

111,100 

112,400 

113,600

ne 1

143,700 

144,700 

145,500 

146,400 

147,000 

147,700

ne7

155,300 

155,800 

156,200 

156,800 

157,500 

158,100

June 13

60.20 

60.15 

60.20 

60.22 

60.20 

60.20

171,100 

170,800 

171,100 

171,200 

171,100 

171,100

June 19

Gage 

height

ME

33.80 

33.90 

34.03 

34.20 

34.50 

34.70

Discharge

iy21

77,500 

77,800 

78,200 

78,700 

79,600 

80,200

May 27

45.97 

46.30 

46.67 

47.09 

47.54 

47.88

Ju

55.61 

55.73 

55.92 

56.09 

56.30 

56.47

Ju

57.80 

57.92 

58.06 

58.20 

58.35 

58.48

Ju

60.19 

60.16 

60.10 

60.05 

60.00 

60.00

114,600 

115,600 

116,700 

118,000 

119,400 

120,400

ne2

148,200 

148,800 

149,600 

150,400 

151,400 

152,200

ne8

158,800 

159,400 

160,100 

160,800 

161,600 

162,200

ne 14

171,000 

170,900 

170,600 

170,300 

170,000 

170,000

June 20

Gage 

height

M

34.84 

35.05 

35.30 

35.61 

35.94 

36.23

Discharge

iy22

80,700 

81,300 

82,100 

83,000 

84,000 

84,900

May 28

48.14 

48.46 

48.72 

49.06 

49.38 

49.58

121,200 

122,200 

123,000 

124,000 

125,000 

125,600

June 3

56.64 

56.78 

56.88 

56.80 

56.67 

56.50

Jt

58.53 

58.63 

58.80 

58.85 

58.95 

59.10

Ju

59.95 

59.90 

59.85 

59.85 

59.81 

59.70

153,000 

153,700 

154,200 

153,800 

153,200 

152,400

ne9

162,500 

163,000 

163,900 

164,100 

164,600 

165,400

ne 15

169,800 

169,500 

169,300 

169,300 

169,100 

168,500

June 21

Supplemental record.- June 13, 3:30 p.m., 60.25 ft., 171,300 sec.-ft.
86 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Smaller reservoirs in Pend Oreille River Basin, Mont. 

Georgetown Lake near Southern Cross, Mont.

Location.- Lat. 46°13', long. 113°16'40", in SW^ sec. 6, T. 5 N., R. 13 W., on Flint 

Creek at outlet of dam, 2 miles west of Southern Cross, and 8 miles south of Philipsburg. Datum of gage is at mean sea level (levels by Montana Power Co.).

Drainage area.- 50.6 square miles.

gage-height record.- Staff gage read to hundredths daily at 8 a/m.

Maxima.- May-June~l948: Contents, 28,510 acre-feet June 23, 24 (elevation, 6,428.65

1939 to April 1948: Contents, 29,520 acre-feet Dec. 2, 3, 1943 (elevation, 

6,428.99 feet, lake ice covered). 

Remarks.- Storage capacity, 31,040 acre-feet. Records furnished by Montana Power Co.

Elevation, in feet, and contents, in acre-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

May

Elevation

25.98

25.97

25.95

25.96

25.96

25.98

26.02

26.12

26.22

26.25

26.28

26.31

26.35

26.40

26.45

26.49

26.52

26.56

26.65

26.78

26.88

26.99

27.10

27.22

27.33

27.43

27.55

27.67

27.76

27.89

27.96

Contents

20,970

20,940

20,890

20,910

20,910

20,970

21,080

21,360

21,640

21,720

21,800

21,890

22,000

22,140

22,270

22,390

22,470

22,580

22,830

23,190

23,470

23,770

24,080

24,410

24,720

25,000

25,330

25,660

25,910

26,270

26,470

June

Elevation

28.02

28.09

28.16

28.28

23.35

28.41

28.44

28.46

28.49

28.50

28.51

28.56

28.58

28.58

28.57

28.55

28.58

28.56

28.55

28.52

28.52

28.61

28.65

28.65

28.64

28.63

28.62

28.59

28.55

28.51

Contents

26,640

26,850

27,060

27,410

27,620

27,800

27,890

27,950

28,040

28,070

28,100

28,240

28,300

28,300

28,270

28,220

28,300

28,240

28,220

28,130

28,130

28,390

28,510

28,510

28,480

28,450

28,420

28,330

28,220

28,100

July

Elevation

28.50

28.50

28.48

28.46

28.43

28.38

28.33

28.33

28.34

28.38

28.42

28.49

38.53

28.55

28.57

28.59

28.58

28.58

28.60

28.62

28.64

28.63

28.62

28.61

28.59

28.57

28.55

28.56

28.55

28.54

28.52

Contents

28,070

28,070

28,010

27,950

27,860

27,710

27,560

27,560

27,590

27,710

27,830

28,040

28,160

28,220

28,270

1.3,330

28,300

28,300

28,360

28,420

28,480

28, .450

28,420

28,390

28,330

28,270

28,220

28,240

28,220

28,190

28,130

Note.- Add 6,400 feet to obtain elevation above mean sea level.

East Fork Rock Creek Reservoir near Philipsburg, Mont.

Location.- Lat. 46°08', long. 113°23', in NE£ sec. 6, T. 4 N., R. 14 W., on East Fork 

Rock: Creek, 14 miles southwest of Philipsburg.

Drainage area.- 32 square miles.

Remarks.- Records furnished by Montana State Water Conservation Board. Dam completed 

in 1938 for irrigation in Flint Creek Valley and has a usable capacity of 16,000 

acre-feet at spillway crest; elevation, 6,055.5 feet. Contents reported as follows:

Contents, in acre-feet, 1948

May 1

15

June 1

15

12,400

12,700

16,000

16,000

July 1

15

Aug. 1

16,000

16,000

16,000
PEND OREILLE RIVER BASIN 8

Smaller reservoirs in Pend Oreille River Basin, Mont. Continued 

Nevada Creek Reservoir near Finn, Mont.

Location.- Lat. 46°48', long. 112°49', in NE-£ sec. 14, T. 12 N., R. 10 W., on Nevada 

Creek, 7 miles west of Finn.

Drainage area.- 145 square miles.

Remarks.- Records furnished by Montana State Water Conservation Board. Spillway «levation, 4,616.0 feet with usable capacity of 12,600 acre-feet. Only record available shows reservoir full and spilling on May 1, 1948, and until Sept. 4, 1948. Dam 

completed in 1938 for irrigation.

West Pork Bitterroot River Reservoir near Conner, Mont.

Location.- Lat. 45°43', long. 114°17', in SW£ sec. 26, T. IS., R. 22 W., on West Pork 

ETFEerroot River, 7 miles upstream from Nez Perce Creek and 23 miles south of Darby.

Drainage area.- 572 square miles.

Remarks.- Records furnished by Montana State Water Conservation Board. Dam completed 

in 1940 for irrigation in Bitterroot Valley and has a usable capacity of 31,600 

acre-feet at spillway crestj elevation, 4,450 feet. Contents reported as follows:

Contents, in acre-feet, 1948

May 1

8

22,000 

26,500

May 15 

Sept. 12

32,000 

32,000

Como Lake near Darby, Mont.

Location.- Lat. 46°08', long. 114°15', in sec. 32, T. 4 N., R. 21 W., l£ mile upstream 

from gaging station on Rock Creek near Darby and 4 miles northwest of Darby. Datum 

of gage is 4,188.5 feet above mean sea level (U. S. Coast and Geodetic Survey datum).

Drainage area.- 54 square miles.

Gage-height record.- Staff gage read occasionally.

Remarks.- Maximum capacity at 54.0 feet gage height (elevation, 4,242.5 feet), 34,800 

acre-feet. Records furnished by Bitterroot Irrigation District. Dam at Como Lake 

was completed in 1909. No record of maximum contents available. Records since 1940 

indicate that it has been filled to capacity at times during nearly every year.

Sage height, in feet, and contents, in acre-feet, 1948

Day

1

3

6

9

12

15

17

18

21

23

24

27

30

31

April

Gage 

height

38.58

Contents

21,300

May

Gage 

height

41.00

41.50

42.00

43.00

44.50

46.33

49.00

51.00

Contents

23,400

23,800

24,200

25,100

26,400

28,000

30,300

32,100

June

Gage 

height

51.00

51.00

50.50

51.00

52.00

52.50

53.00

53.00

54.00

54.00

54.00

Contents

32,100

32,100

31,600

32,100

33,000

33,400

33,900

33,900

34,800

34,800

34,800

July

Gage 

height

54.00

54.00

54.00

54.00

54.00

54.00

54.00

54.00

53.67

53.00

51.25

49.50

48.83

Contents

34,800

34,800

34,800

34,800

34,800

34,800

34,800

34,800

34,500

33,900

32,300

30,800

30,200

August

Gage 

height

47.67

Contents

29,100
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Smaller reservoirs in Pend Oreille River Basin, Mont. Continued 

Camas Reservoirs

A group of four reservoirs in Little Bitterroot River Basin operated for irrigation. 

Records furnished by Office of Indian Affairs. All gages set to sea level datum. No 

recording gages, complete record of month-end contents available since Sept. 30, 1940.

Little Bitterroot Lake on Little Bitterroot River, diversion works in sec. 21, T. 27 N., 

IT24 W., Z miles southwest of Marion; completed in 1918, has usable capacity of 

18,000 acre-feet at elevation 3,895.4 feet.

Maximum contents observed: May-July 1948, 24,000 acre-feet May 25 to July 31.

1940 to Apr. 30, 1948: 12,300 acre-feet June 30, 1947.

Hubbart Reservoir on Little Bitterroot River, diversion works in sec. 18, T. 25 N., R. 

24 W., 9 miles northwest of Niarada; completed in 1923, has usable capacity of12,100 acre-feet at spillway crest elevation 3,219.0 feet.

Maximum contents observed: May-July 1948, 12,100 acre-feet Apr. 30 to July 31.

1940 to Apr. 30, 1948: 12,100 acre-feet, May 31, June 30, 1943.

Upper Dry Fork Reservoir on Dry Pork Creek, diversion works in sec. 16, T. 23 N., R. 24 

W., 4 miles northwest of Loneplne; completed in 1940, has usable capacity of 2,700 

acre-feet at elevation 2,928.1 feet.

Maximum contents observed: May-June 1948, 2,660 acre-feet June 30.

1940 to April 30, 1948: 2,510 acre-feet June 30, 1947.

Dry Fork Reservoir on Dry Pork Creek, diversion works in sec. 3, T. 22 N., R. 24 W., 

1 mile west of Loneplne; completed in 1934, has usable capacity of 4,000 acre-feet 

at elevation 2,856.7 feet.

Maximum contents observed: May-June 1948, 3,750 acre-feet June 22, 30.

1940 to Apr. 30, 1948: 4,080 acre-feet, Apr. 30, 1942.

Contents, in acre-feet, on indicated date, 1948

Date

25...........

31...........

22...........

31...........

Little 

Bitterroot 

Lake

24 000

24,000

Hubbart 

Reservoir

12 000

12,120

Upper 

Dry Pork 

Reservoir

1,450

Dry 

Fork 

Reservoir

3,750

2,940

Total

42 130

42 320

40,510

Mission Valley Reservoirs

A group of eight reservoirs in area east of and tributary to Plathead River and 

Jocko River operated for irrigation. Records furnished by Office of Indian Affairs. 

All gages set to sea level datum. No recording gages. Complete record of month-end 

contents available since Sept. 30, 1940.

Twin Reservoir, fed entirely by canals, diversion works In sec. 18, T. 22 N., R. 19 

W., 4 miles southeast of Poison, completed in 1932, has usable capacity of 1,210 

acre-feet (revised) at elevation 3,095 feet.

Maximum contents observed, May-June 1948: 687 acre-feet June 1, 8. 

1940 to April 1948: 800 acre-feet June 30, 1947.

Pablo Reservoir, fed entirely by canals, diversion works in sec. 27, T. 22 N., R. 20 

W., 3 miles south of Poison; completed in 1914, has usable capacity of 25,000 acrefeet at elevation 3,211.3 feet.

Maximum contents observed, May-June 1948: 25,170 acre-feet June 1, 4. 

1940 to April 1948: 22,530 acre-feet June 30, 1942.
FEND OREILLE RIVER BASIN 89

Smaller reservoirs in Fend Oreille River Basin, Mont. Continued 

Mission Valley Reservoirs Continued

Lower Crow Reservoir, on Crow Creek, diversion works in sec. 11, T. 20 N., R. 21 W., 

6 miles west of Ronan, completed in 1933, has usable capacity of 10,350 acre-feet 

at elevation 2,877 feet.

Maximum contents observed, May-June 1948: 10,770 acre-feet May 21, 22. 

1940 to April 1948: 10,460 acre-feet May 31, 1942, June 30, 1947.

Kicking Horse Reservoir, fed entirely by canals, diversion works in sec. 31, T. 20 N., 

R. 19 W., 5 miles south of Ronan, completed in 1930, has usable capacity of 8,350 

acre-feet at elevation 3,061.94 feet.

Maximum contents observed, May-June 1948: 8,080 acre-feet May 22. 

1940 to April 1948: 8,000 acre-feet June 30, 1943, June 30, 1947.

Nlnepipe Reservoir, fed entirely by canals, diversion works in sec. 27, T. 20 N., R. 

ZO W., Z miles northwest of Charlo, completed In 1923, has usable capacity of 14,870 

acre-feet at elevation 3,010 feet.

Maximum contents observed, May-June 1948: 15,540 acre-feet June 8, 13, 14.

1940 to April 1948: 15,370 acre-feet June 30, 1942.

McDonald Reservoir, on Post Creek, diversion works in sec. 10, T. 19 N., R. 19 W., 

9 miles east of Charlo, completed In 1919, has usable capacity of 8,220 acre-feet 

at elevation 3,598 feet.

Maximum contents observed, May-June 1948: 8,160 acre-feet May 28, June 11.

1940 to April 1948: 8,160 acre-feet June 30, 1942.

Mission Reservoir, on Mission Creek, diversion works In sec. 16, T. 18 N., R. 19 W., 

4 miles east of St. Ignatius, completed In 1935, has a usable capacity of 7,250 

acre-feet at elevation 3,406 feet.

Maximum contents observed, May-June^ 1948: 7,720 acre-feet May 29, June 11. 

1940 to April 1948: 7,450 acre-feet June 30, 1942.

Tabor Reservoir, on Dry Creek, diversion works In sec. 6, T. 17 N., R. 18 W., 8 miles 

southeast of St. Ignatius, completed In 1919, has usable capacity of 23,000 acrefeet at elevation 4,024 feet.

Maximum contents observed: May-July 1948: 23,310 acre-feet July 8. 

1940 to April 1948: 22,690 acre-feet June 30, 1942.

Contents, In acre-feet, on Indicated dates, 1948

Date

May 31............

July 31............

Date

May 31............

July 31............

Twin 

Reservoir

238

452

McDonald 

Reservoir

8 n ?n

8 OQO

8,040

Pablo 

Reservoir

17,680

Mission 

Reservoir

6,880

Lower 

Crow 

Reservoir

9,510

8,610

Tabor 

Reservoir

15,700

21,460

20,640

Kicking 

Horse 

Reservoir

7,840

6,520

Ninepipe 

Reservoir

12,250

15,210

10,400

Total

QQ QK,Ct

QO 7 o*

79,222

Lower Jocko Lake near Arlee, Mont.

Lower Jocko Lake on Jocko River, diversion works In sec. 28, T. 17 N., R. 17 W., 

15 miles east of Arlee, completed In 1937, has usable capacity of 7,600 acre-feet 

at elevation 4,350 feet. Records furnished by Office of Indian Affairs. Gage set 

to sea level datura. Nonrecording. Complete record of month-end contents available 

since Sept. 30, 1940.

Maximum contents observed: May-June 1948, 6,700 acre-feet June 8.

1940 to April 1948: 5,760 acre-feet, June 30, 1943.

Contents reported as follows:

Contents, in acre-feet, 1948

May 12

31

June 8

30

1,670

6,150

6,700

5,240

July 12

23

31

4,500

4,030

3,640
90 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Flint Creek near Southern Cross, Mont.

Location.- Lat. 46°14', long. 113°18', In NW£ sec. 36, T. 6 N., R. 14 W., half a mile 

downstream from power plant, 2 miles downstream from Georgetown Lake, 3 miles 

northwest of Southern Cross, and 6 miles south of Phlllpsburg.

Drainage area.- 52.5 square miles.

gage-height record.- Staff gage read once dally.

Discharge record.-"Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths. Shifting-control method used May 1 to June 2, 

July 7-31. Gate-operation records used to determine mean dally discharge on days 

when gate had been closed or opened.

Maxima.- May-July 1948: Discharge, 146 second-feet (regulated) June 4 to July 6 (gage 

height, 1.78 feet).

1940 to April 1948: Discharge observed, 162 second-feet June 13, 1942 (gage 

height, 1.86 feet).

Remarks.-,Flow regulated by Georgetown Lake (see preceding page). Gage height and gateoperation record furnished by Montana Power Co.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

87

87

84

84

63

38

37

40

40

40

June

93

104

117

137

146

146

146

146

146

146

July

146

146

146

146

146

137

100

66

48

31

Day

11

12

13

14

IS

16

17

IS

19

20

May

40

40

40

40

40

40

42

42

44

45

June

146

146

146

146

146

146

146

146

146

146

July

31

39

45

45

45

51

56

59

70

71

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches .................................................................................................................. .

May

47

47

44

40

40

39

39

53

69

74

82

51.2

1.12

June

146

146

146

146

146

146

146

146

146

146

142

3.01

July

71

71

71

71

71

71

70

70

70

70

59

77.1

1.70

Gage height, in feet, and discharge, in second-feet, at in

Hour

10a

lOa

lla

lOa

lla

lla

lOa

lOa

Gage 

height Discharge

May 17

0.98 42

May 18 

.98 42

May 19 

1.00 44

May 20 

1.02 45

May 21 

1.04 47

May 22 

1.04 47

May 23 

1.00 44

May 24 

.95 40

May 25 

.94 40

Hour

10:30a

lOa

IP

lOa

2p

ll:30a

3p

3:30p

4p

Gage 

height Discharge

May 26

0.93 39

May 27 

.93 39

May 28 

.93 39

May 29 

1.22 64

May 30 

1.30 74

May 31 

1.40 87

June 1 

1.44 93

June 2 

1.60 110

June 3 

1.66 121

Hour

ll:30a

lla

2p

lOa

10:30a

12:30p

lla

10:30a

lOa

Gage 

height

dicated tvme, 1948

Discharge

June 4 

1.78 146

June 5 

1.78 146

June 6 

1.78 146

June 7 

1.78 146

June 8 

1.78 146

June 9 

1.78 146

June 10 

1.78 146

June 11 

1.78 146

June 12 

1.78 146

Hour

ll:30a

lOa

10:30a

IP

lla

N

10:30a

lp

10:30a

Gage 

height Discharge

June 13 

1.78 146

June 14 

1.78 146

June 15 

1.78 146

June 16 

1.78 146

June 17 

1.78 146

June 18 

1.78 146

June 19 

1.78 146

June 20 

1.78 146

June 21 

1.78 146
PEMD OREILLE RIVER BASIN 91

Flint Creek at Maxville, Mont.

Location.- Lat. 46°28'00", long. 113°14'30", in NW£ sec. 9, T. 8 N., R. 13 W., 0.4 mile

west of Maxville and 1 mile upstream from Boulder Creek. 

Drainage area.- 208 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

570 second-feet and extended to peak stage by logarithmic plotting. Gage heights

used to hundredths. 

Maxima.- May-June 1948: Discharge, 928 second-feet 2 p.m. June 4 (gage height, 5.25

1941 to April 1348: Discharge, 1,680 second-feet Mar. 28, 1943 (gage height, 6.79 

feet).

Remarks.- Flow regulated by Georgetown Lake and during irrigation season flow is supplemented by water from East Fork Rock Creek which is diverted in sec. 5, T. 4 N., R. 14 

W., 500 feet below Rock Creek Dam, through a canal into Trout Creek, thence into 

Flint Creek.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

277

233

214

208

195

175

198

328

313

260

June

307

349

379

764

721

515

464

434

395

351

July

335

442

374

333

306

282

248

216

181

154

Day

11

12

13

14

15

16

17

18

19

20

May

242

221

213

228

218

206

221

280

310

381

June

368

520

402

363

316

305

359

354

325

337

July

152

158

147

144

132

141

142

150

187

213

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches ................................................... ........................................................................

May

411

404

413

346

315

333

314

308

347

341

312

283

June

385

808

735

668

598

547

463

412

369

335

455

July

192

181

179

179

168

162

159

162

172

171

158

204

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

§M

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.19 

3.26 

3.31 

3.33 

3.32 

3.32

206 

218 

226 

229 

228 

228

May 23

4.17 

4.09 

4.04 

4.07 

4.05 

4.00

Mi

3.82 

3.82 

3.84 

3.89 

3.93 

3.93

Ju

4.33 

4.98 

5.23 

5.21 

5.10 

5.04

442 

415 

399 

408 

402 

386

»y29

335 

335 

341 

354 

366 

366

ne 4

499 

780 

916 

906 

845 

812

June 10

3.87 

3.83 

3.87 

3.90 

3.89 

3.85

Ju

3.70 

3.69 

3.69 

3.68 

3.69 

3.69

349 

338 

349 

357 

354 

344

ne!6

306 

304 

304 

302 

304 

304

Gage 

height Discharge

May 18

3.37 

3.61 

3.68 

3.69 

3.65 

3.61

237 

286 

302 

304 

295 

286

May 24

3.94 

3.88 

3.83 

3.83 

3.81 

3.71

369 

352 

338 

338 

333 

308

May 30

3.90 

3.82 

3.81 

3.82 

3.83 

3.80

Ju

4.98 

4.94 

4.88 

4.82 

4.71 

4.59

Ju

3.82 

3.84 

3.90 

3.96 

4.08 

4.10

357 

335 

333 

335 

338 

330

ne 5

780 

760 

730 

700 

650 

598

nell

335 

341 

357 

374 

412 

418

June 17

3.74 

3.86 

3.96 

4.03 

4.00 

3.94

316 

346 

374 

396 

386 

369

Gage 

height Discharge

May 19

3.62 

3.68 

3.71 

3.78 

3.78 

3.81

288 

302 

308 

325 

325 

333

May 25

3.64 

3.67 

3.73 

3.79 

3.83 

3.78

293 

299 

313 

328 

338 

325

May 31

3.72 

3.67 

3.70 

3.75 

3.77 

3.68

311 

299 

306 

318 

323 

302

June 6

4.44 

4.34 

4.28 

4.34 

4.38 

4.32

539 

502 

481 

502 

517 

495

June 12

4.17 

4.28 

4.47 

4.62 

4.54 

4.34

442 

481 

551 

611 

578 

502

June 18

3.92 

3.88 

3.87 

3.88 

3.88 

3.83

363 

352 

349 

352 

352 

338

Gage 

height Discharge

May 20

3.86 

3.91 

3.93 

4.12 

4.11 

4.14

346 

360 

366 

425 

421 

432

May 26

3.71 

3.75 

3.81 

3.87 

3.89 

3.88

308 

318 

333 

349 

354 

352

June 1

3.60 

3.62 

3.68 

3.75 

3.81 

3.82

284 

288 

302 

318

333 

335

June 7

4.21 

4.12 

4.12 

4.29 

4.36 

4.27

456 

425 

425 

484 

510 

477

June 13

4.17 

4.04 

3.98 

3.95 

3.96 

4.00

442 

399

sao

372 

374

386

June 19

3.78 

3.74 

3.74 

3.77 

3.81 

3.84

325 

316 

316 

323 

333 

341

Gage 

height Discharge

May 21

4.07 

4.04 

4.05 

4.10 

4.13 

4.02

408 

399 

402 

418 

428 

392

May 27

3.79 

3.72 

3.71 

3.72 

3.70 

3.62

328 

311 

308 

311 

306 

288

June 2

3.80 

3.77 

3.83 

3.92 

3.98 

3.99

Ju

4.14 

4.03 

4.03 

4.15 

4.26 

4.23

330 

323 

338 

363 

380 

383

ne8

432 

396 

396 

435 

474 

463

June 14

3.97 

3.93 

3.93 

3.92 

3.86 

3.81

377 

366 

366 

363 

346 

333

June 20

3.85 

3.84 

3.83 

3.82 

3.79 

3.80

344 

341 

338 

335 

328 

330

Gage 

height Discharge

May 22

3.99 

3.98 

4.00 

4.10 

4.17 

4.16

383 

380 

386 

418 

442 

438

May 28

3.54 

3.60 

3.69 

3.78 

3.84 

3.84

271 

284 

304 

325 

341 

341

June 3

3.94 

3.88 

3.90 

3.97 

4.06 

4.19

Ju

4.08 

3.97 

3.98 

4.02 

4.01 

3.95

369 

352 

357 

377 

405 

449

ne9

412 

377 

380 

392 

389 

372

June 15

3.75 

3.72 

3.73 

3.75 

3.74 

3.73

318 

311 

313 

318 

316 

313

June 21

3.85 

3.88 

3.93 

4.02 

4.14 

4.39

344 

352 

366 

392 

432 

520

Supplemental record.- May 20, 3 p.m., 3.98 ft., 380 sec.-ft.; June 4, 2 p.m.. 

ft., 928 sec.-ft.; June 11, 6 p.m., 4.07 ft., 408 sec.-ft. 

824933 0-49-8
92 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Flint Creek near Maxvllle, Mont.

Location.- Lat. 46°32', long. 113°14', In NE£ sec. 21, T. 9 N., R. 13 W., 50 feet down-

 stream from point of diversion of Allendale Canal and 4 miles north of Maxvllle.

Drainage area.- 324 square miles.

Page-height record.- Wire-weight gage read once dally except May 24, July 4.

Discharge record.- Stageydtischarge relation defined by current-meter measurements below 

140 second-feet and extended to peak stage by logarithmic plotting on basis of comparison with sum of flow at station at Maxvllle and Boulder Creek at Maxvllle. Discharge for days of no gage-height record computed on basis of records for station 

at Maxvllle. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge observed, 1,700 second-feet 9 a.m. June 4 (gage 

height, 6.39 feet). ,

1946 to April 1948: Discharge observed, 580 second-feet June 10, 1947 (gage 

height, 3.90 feet).

Remarks.- Many diversions for Irrigation above and below gage. During Irrigation sea-

 son flow Is supplemented by water from East Pork Rook Creek which Is diverted In 

sec. 5, T. 4 N., R. 14 W., 500 feet below East Pork Rock Creek Dam, through a canal 

Into Trout Creek, thence Into Flint Creek. Some regulation by dam at Georgetown 

Lake.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

10

May June

756

956

1,120

1,700

1,500

1,020

748

740

732

732

July

876

716

660

590

512

441

391

353

270

218

Day

11

1fl

13

14

15

1fi

17

18

19

SO

May June

748

940

710

696

674

654

640

618

584

576

July

279

265

218

178

163

181

170

185

235

239

Day

21

22

23

24

25

26

27

28

29

30

31

May

996

850

804

836

844

828

796

788

772

_

Runoff, in inches ........ .....................................................................................-.............. . »

June

916

1,120

1,070

1,000

916

804

748

674

640

590

-

844

-

July

248

230

213

235

213

205

201

193

205

201

193

306

-

Flint Creek near Drummond, Mont.

Location.- Lat. 46°38', long. 113°09', In NW^NEi sec. 18, T. 10 N. , R. 13 W. , at hlghway bridge If miles upstream from mouth and 2^ miles south of Drummond.

Drainage area.- 492 square miles.

Gage -height record.- Wire-weight gage read once dally except July 4. Gage readings 

doubtful June 28, 29, July 5.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

900 second-feet and extended to peak stage. Discharge for days of. doubtful or no 

gage-height record computed on basis of records for stations at Maxvllle and near 

Maxvllle.

Maxima.- May-June 1948: Discharge observed, 1,800 second-feet June 3 (gage height, 

TT7T5 feet).

1946 to April 1948: Discharge not determined June 10, 1947 (gage height, 5.10 

feet, site and datum then In use); gage height, 6.22 feet Jan. 7, 1947 (ice Jam), 

site and datum then in use.

Remarks . - Many diversions above and below station for Irrigation. During Irrigation 

season flow Is supplemented by water from East Fork Rock Creek which Is diverted In 

sec. 5, T. 4 N., R. 14 W. , 500 feet below East Pork Rock Creek Dam, through a canal 

Into Trout Creek, thence Into Flint Creek. Some regulation by Georgetown Lake.

Mean discharge, in second-feet, I91f8

Day

1

2

3

4

5

6

7

8

9

10

May June

849

951

1,800

1,640

1,250

1,060

988

899

1,020

793

July

596

800

699

600

500

442

392

311

256

224

Day

11

12

13

14

15

16

17

18

19

20

May June

772

800

807

842

687

719

752

655

620

988

July

247

199

166

157

150

161

157

143

322

301

Day

21

22

23

24

25

26

27

28

29

30

31

May

899

958

1,050

973

958

921

849

June

1,020

1,640

1,020

1,070

1,040

965

907

800

700

602

July

244

213

207

213

224

230

238

235

269

250

235
PEND OREILLE RIVER BASIN

Trout Creek above main canal, near Philipsburg, Mont.

Location.- Lat. 46°10'30", long. 113°24'20", in NW$ sec. 19, T. 5 H., R. 14 W., Just

above drop for main supply canal from East Pork Rock Creek and 12 miles southvest

of Phillpsburg.

Drainage area.- 4.2 square miles. 

Gage-height record.- Water-stage recorder graph except for periods May 1-13, May 27 to June 29. 

Discharge record.- Stage-discharge relation defined by current-meter measurements belov

10 second-feet and extended to peak stage. Discharge for periods of no gage-height

record computed on basis of recorded range in stage (1.45 feet to 1.89 feet) and

records for nearby streams. Gage heights used to hundredtha. 

Maxima.- May-June 1948: Discharge, 23 second-feet 6 a.m. May 20, June 4; gage height,

1.90 feet May 20.

1945 to April 1948: Discharge, 26 second-feet April 14, 1947 (gage height, 1.97

feet). 

Remarks.- Small diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

11

10

10

 10

9

9

11

14

13

11

June

10

11

15

20

18

17

16

15

14

12

July

11

10

9.2

8.9

8.3

8.0

8.0

7.7

7.7

7.4

Monthly mean discharge, in second-fee 

Runoff, in inches .......................................

Day

11

12

13

14

15

16

17

1R

19

20

May

12

12

12

13

11

10

10

10

13

16

June'

13

15

14

12

11

11

10

10

10

10

July

8.0

7.4

7.2

7.2

7.2

7.2

6.9

7.2

7.7

7.2

Day

21

22

23

24

25

26

27

28

29

30

31

t .........

May

11

11

11

10

9.6

9.1

8.E

7.E

8

8

9

10.6 

2.90

June

11

12

13

12

11

11

10

10

9.5

9.2

12.4 

3.29

July

6.9

6.6

6.6

6.6

6.6

6.4

6.6

6.6

6.6

6.4

6.4

7.47 

2.05

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8

N

12

Gage 

height Discharge

May 17

1.57 

1.56

11 

10

May 23

1.57 

1.56

11 

10

Gage 

height Discharge

May 18

1.57 

1.56

10

11

May 24

1.56 

1.54

10 

9.8

Gage 

height Discharge

May 19

1.58 

1.62 

1.62 

1.72 

1.72 

1.73

11 

12 

12 

16 

16 

16

May 25

1.54 

1.52

9.8 

9.2

Gage 

height Discharge

May »)

1.76 

1.83 

1.73 

1.6.7 

1.62 

1.61

18 

20 

16 

14 

12 

12

May 26

1.52 

1.51

9.2 

8.9

Gage 

height Discharge

May 21

1.61 

1.57 

1.56

12 

11 

10

May 27

1.51 8.9

Gage 

height Discharge

May 22

1.57 

1.57

11 

11

May 28
94 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Trout Creek near Southern Cross, Mont.

Location.- Lat. 46°17', long. 113°20', in NWi sec. 15, T. 6 N., R. 14 W., a quarter of

 a mile upstream from mouth, 4£ miles southwest of Philipsburg, and 6% miles northwest of Southern Cross. 

Drainage area.- 34.8 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

 80 second-feet and extended to peak stage by logarithmic plotting. Gage heights

used to hundredths. 

Maxima.- May-June 1948: Discharge, 124 second-feet (regulated) 10 a.m. June 23 (gage

 height, 4.18 feet).

1945 to April.1948: Discharge, 331 second-feet Apr. 16, 1948 (gage height, 5.67 

feet). 

Remarks.- During irrigation season flow is supplemented by water from East Pork Rock

 Creek which is diverted in sec. 5, T. 4 N., R. 14 W., 500 feet below Rock Creek Dam, 

through a canal into Trout Creek.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

46

41

40

41

37

37

47

61

54

48

June

32

33

44

58

52

49

47

38

35

47

July

112

115

106

102

99

92

87

82

74

72

Day

11

12

13

14

15

16

17

18

19

20

May

52

51

52

56

50

48

46

43

49

66

June

55

54

50

48

48

56

61

61

65

68

July

75

73

71

69

65

67

57

59

68

74

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .. . ... . ............. .. .... ..... .....

Runoff, in inches .................................................. ..... .......... .......................................................

May

47

43

42

37

31

25

22

22

25

24

24

June

96

110

117

109

109

107

103

106

103

104

July

69

68

69

66

65

63

56

54

56

57

56

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.37 

3.38 

3.38 

3.37 

3.30 

3.30

48 

48 

48 

48 

42 

42

May 23

3.31 

3.28 

3.25

43 

41 

38

May 29

3.01 

3.04 

3.07 

3.05 

3.01 

3.00

24 

26 

27 

26 

24 

23

June 4

3.41 

3.49 

3.57 

3.57 

3.49 

3.45

51 

57 

64 

64 

57 

54

June 10

3.34 

3.37 

3.40 

3.34 

3.38 

3.36

Ju

3.39 

3.39 

3.40 

3.47 

3.66 

3.59

45 

48 

50 

45 

48 

47

ne!6

49 

49 

50 

56 

72 

66

Gage 

height Discharge

May 18

3.32 

3.33 

3.34 

3.32 

3.30 

3.29

44 

44 

45 

44 

42 

41

May 24

3.25 

3.22 

3.20

M

3.01 

3.01

Ju

3.43 

3.41 

3.39

38 

36 

35

iy30

24 

24

ne 5

52 

51 

49

June 11

3.38 

3.40 

3.40 

3.46 

3.65 

3.51

48 

50 

50 

55 

72 

59

June 17

3.58 

3.53 

3.52 

3.51 

3.48 

3.54

65 

61 

60 

59 

56 

62

Gage 

height Discharge

May 19

3.31 

3.35 

3.37 

3.40 

3.45 

3.62

43 

46 

48 

50 

54 

69

May 25

3.19 

3.19 

3.11 

3.09 

3.07 

3.07

ME

3.01 

2.99

34 

34 

30 

28 

27 

27

iy31

24 

23

June 6

3.39 

3.38

49 

48

June 12

3.49 

3.46 

3.45 

3.40 

3.41 

3.40

57 

55 

54 

50 

51 

50

June 18

3.53 

3.53 

3.56 

3.54 

3.51 

3.54

61 

61 

63 

62 

59 

62

Gage 

height Discharge

May 20

3.57 

3.60 

3.72 

3.64 

3.51 

3.43

64 

67 

78 

71 

59 

52

May 26

3.07 

3.07 

3.04 

2.99 

2.98 

2.98

Ju

3.06 

3.18 

3.20 

3.19 

3.16 

3.17

Jll

3.39 

3.42 

3.40 

3.32 

3.28 

3.29

27 

27 

26 

23 

22 

22

me 1

27 

34 

35 

34 

33 

33

ne 7

49 

52 

50 

44 

41 

41

June 13

3.40 

3.40 

3.41

50 

50 

51

June 19

3.55 

3.57 

3.64 

3.62 

3.57 

3.56

62 

64 

71 

69 

64 

63

Gage 

height Discharge

May 21

3.40 

3.40 

3.38 

3.33 

3.30 

3.28

50 

50 

48 

44 

42 

41

May 27

2.98 

2.96

Ju

3.16 

3.18 

3.19 

3.13 

3.13 

3.19

Ju

3.30 

3.31 

3.30 

3.19 

3.17 

3.19

22 

21

ne2

23 

34 

34 

31 

31 

34

ne8

42 

43 

42 

34 

33 

34

June 14

3.41 

3.40 

3.39 

3.35 

3.33 

3.34

51 

50 

49 

46 

44 

45

June 20

3.56 

3.57 

3.62 

3.66 

3.64 

3.67

63 

64 

69 

72 

71 

73

Gage 

height Discharge

May 22

3.29 

3.29 

3.28 

3.26 

3.46 

3.37

41 

41 

41 

39 

55 

48

May 28

2.99 

3.00

Ju

3.25 

3.33 

3. 36 

3.36 

3.34 

3.40

Ju

3.19 

3.19 

3.18 

3.19 

3.19 

3.28

23 

23

ne3

38 

44 

47 

47 

45 

50

ne9

34 

34 

34 

34 

34 

41

June 15

3.36 

3.39 

3.40 

3.38 

3.38 

3.38

47 

49 

50 

48 

48 

48

June 21

3.74 

3.78 

3.93 

4.13 

4.04 

4.02

80 

83 

98 

118 

109 

107

Supplemental record.- May 20, 10 a.m., 3.62 ft., 69 seo.-ft.; May 22, 6 p.m., 3.33 ft., 

44 sec.-ft.; May 25, 10 a.m., 3.18 ft., 34 sec.-ft.; June 1, 2 a.m., 3.04 ft., 26 sec.- 

ft., 6 a.m., 3.15 ft., 32 sec.-ft. ; June 2, 2 p.m., 3.14 ft., 31 sec.-ft.; June 4, 2 p.m. 

3.59 ft., 66 sec.-ft.j June 7, 11 a.m., 3.44 ft., 53 sec.-ft., 1 p.m., 3.33 ft., 44 sec.- 

ft.; June 8, 1 p.m., 3.23 ft., 37 sec.-ft.; June 11, 3 p.m., 3.39 ft., 49 seo.-ft., 

6 p.m., 3.71 ft., 77 sec.-ft.; June 12, 2 a.m., 3.55 ft., 62 sec.-ft.; June 16, 6 p.m., 

3.63 ft., 70 sec.-ft.; June 17, 2 a.m., 3.61 ft., 68 sec.-ft.; June 20, 2 p.m., 3.67 ft., 

73 sec.-ft.
PEND OREILLE RIVER BASIN 95

Boulder Creek at Maxville, Mont.

Location.- Lat. 46°28'50", long. 113°14'00", in SE£ sec. 4, T. 8 N., R. 13 W., an eighth 

of a mile upstream from mouth and three-quarters of a mile north of Maxville.

Drainage area.- 71.3 square miles.

Gage-height record^- Water-stage recorder graph except for period June 27-30.

Discharge record.-^Stage-discharge relation defined by current-meter measurements below 

550 second-feet and extended to peak stage. Discharge for period of no gage-height 

record computed on basis of recorded range in stage and records for Flint Creek at 

Maxville.

Maxima.- May-June 1948: Discharge, 763 second-feet 5 p.m. June 3 (gage height, 4.24 

feeT).

1939 to April 1948: Discharge, 650 second-feet May 26, 1942 (gage height, 4.04 

feet).

Remarks.- Several small diversions above station for irrigation.

Mean discharge, in se&md-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

67

60

57

58

54

57

69

81

77

70

June

404

426

620

642

511

432

411

376

332

309

July

171

188

156

142

130

120

113

105

92

98

Day

11

12

13

14

15

16

17

18

19

20

May

70

67

75

81

78

85

119

196

274

378

June

326

314

250

216

190

197

222

196

175

167

July

95

91

82

78

73

75

68

67

78

86

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... . .... ....... . .

Runoff, in inches ................................................. . ........................................................................

May

483

527

436

372

410

447

462

525

' 485

421

400

227

3.67

June

224

289

277

265

248

226

210

190

180

157

299

4.67

July

75

68

66

69

62

58

58

69

78

73

63

91.5

1.48

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.23 

2.25 

2.27 

2.29 

2.42 

2.55

105 

108 

112 

115 

140 

167

May 23

3.59 

3.48 

3.39 

3.32 

3.31 

3.33

Mi

3.63 

3.58 

3.52 

3.51 

3.52 

3.52

Ju

4.01 

3.97 

3.95 

3.91 

3.89 

3.83

496 

455 

422 

397 

394 

401

i.y29

512 

492

470 

466 

470 

470

ne 4

664 

648 

640 

624 

616 

592

June 10

3.09 

3.06 

3.02 

2.99 

3.06 

3.09

Ju

2.57 

2.56 

2.56 

2.63 

2.81 

2.87

321 

311 

298 

289 

311 

321

ne!6

180 

178 

178 

193 

237 

254

Gage 

height Discharge

May 18

2.62 

2.63 

2.63 

2.69 

2.77 

2.83

185 

185 

185 

200 

221 

258

May 24

3.28 

3.22 

3.18 

3.16 

3.28 

3.38

M

3.48 

3.40 

3.33 

3.28 

5.35 

3.42

583 

365 

549 

542 

585 

419

ay 30

455 

426 

401 

585 

408 

455

June 5

5.72 

3.65 

5.65 

5.56 

5.52 

5.52

548 

520 

512 

485 

470 

470

June 11

3.10 

5.06 

5.00 

5.02 

5.25 

5.29

524 

311 

292 

298 

573 

587

June 17

2.85 

2.76 

2.74 

2.72 

2.67 

2.68

242 

224 

219

214 

202 

204

Gage 

height Discharge

May 19

2.89 

2.92 

2.94 

2.95 

5.02 

5.11

255 

264 

271 

274 

296 

525

May 25

5.58 

5.52 

5.28 

5.27 

3.45 

5.55

Mi

5.39 

3.54 

3.26 

5.25 

5.52 

5.45

Jl

5.49 

5.45 

5.37 

5.52 

5.59 

3.47

419 

597 

585 

580 

457 

475

iy3l

422 

404 

576 

367 

597 

457

ne6

458 

457 

415 

597 

422 

451

June 12

5.21 

5.12 

5.05 

2.98 

2.94 

2.91

559 

550 

508 

286 

274 

265

June 18

2.69 

2.67 

2.66 

2.62 

2.59 

2.57

207 

202 

200 

191 

184 

180

Gage 

height Discharge

May 20

3.16 

5.25 

5.25 

5.29 

5.55 

5.48

542 

566 

575 

587 

408 

455

May 26

5.52 

5.47 

5.40 

5.57 

5.46 

5.52

Ju

5.42 

5.54 

3.25 

3.21 

5.35 

5.50

Ju

3.46 

3.58 

5.31 

5.27 

5.51 

5.56

470 

451 

426 

415 

448 

470

ne 1

455 

404 

375 

359 

408 

462

ne7

448 

419 

594 

580 

594 

412

June 13

2.87 

2.84 

2.80

254 

245 

254

June 19

2.54 

2.55

2.53

175

176 

171

Gage 

height Discharge

May 21

5.50 

5.49 

5.46 

5.53 

5.69 

5.82

462

458 

448 

475 

556 

588

May 27

5.50 

3.46 

5.42 

5.42 

3.59 

3.67

462 

448 

455 

455 

496 

528

June 2

5.52 

5.45 

5.55 

5.28 

5.54 

5.44

Ju

5.54 

5.28 

5.21 

3.21 

5.23 

3.22

470 

444 

408 

585 

404 

440

ne8

404 

585 

559 

559 

566 

365

June 14

2.76 

2.69 

2.65

224 

207 

198

June 20

2.51

2.50 

2.51

167 

165 

167

Gage 

height Discharge

May 22

5.75 

5.72 

5.65 

5.60 

5.59 

5.60

560 

548 

512 

500 

496 

500

May 28

5.75 

5.69 

5.65 

5.60 

5.65 

5.67

552 

556 

512 

500 

520 

528

JuneS

5.56 

5.72 

5.92 

4.17 

4.15 

4.17

JL

5.19 

5.14 

3.10 

5.07 

5.09 

3.11

485 

548 

628 

752 

722 

752

ne9

555 

557 

524 

514 

521 

527

June 15

2.65 

2.61 

2.57

195 

188 

180

June 21

2.55 

2.57 

2.71 

2.88 

2.97 

3.05

176 

180 

212 

256 

285 

308

Supplemental record.- June 3, 5 p.m. 4.24 ft., 765 sec.-ft.; June 11, 2 p.m., 2.97 

ft., 283 sec.-ft.
96 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Willow Creek near Hall, Mont.

Location.- Lat. 46°37', long. 113°11', in NE£NW£ sec. 24, T. 10 N., R. 13 W., about 

half a mile upstream from mouth and 2 miles northeast of Hall.

Drainage araa.- 102 square miles.

Gage-height record.- Wire-weight gage read once daily except for period May 1-28.

Doubtful gage-height record June 3-5, 14, July 24. Gage heights used to hundredths.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used July 13-31. Discharge for periods of doubtful gageheight record computed on basis of records for stations on Flint Creek and precipitation records.

Maxima.- May-June 1948: Discharge observed, 162 second-feet 5 p.m. May 29 (gageheight, 3.88 feet).

1945 to April 1948: Discharge observed, 75 second-feet Apr. 22, 1947 (gage 

height, 2.83 feet).

Remarks.- Many diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May June

122

115

130

150

110

75

63

57

47

40

July

31

35

31

30

28

20

20

14

14

18

Day

11

IS

13

14

15

16

17

18

19

M

May June

49

47

82

85

76

63

55

51

44

44

July

18

18

17

16

17

17

17

19

45

44

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

_

-

_

_

-

-

-

-

159

144

133

_

-

June

82

87

72

61

63

66

66

68

45

34

-

71.6

-

July

38

37

37

31

21

24

21

19

34

17

19

24.7

-

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

5pVP

3p

2p

IP

IP

IP

Gage 

^height Discharge

May 29

3.88

3.86

162

157

May 30

3.80 144

May 31

5.74

June

3.68

June

3.64

June

3.60

133

1

122

2

115

3

Hour

IP

10 a

4p

*P

4 P

2p

Gage 

height Discharge

June 4

3.60

Ji

3.50

Ji

3.34

Jl

3.24

Jl

3.18

jne 5

ine 6

75

ine 7

63

ine 8

57

June 9

3.08 47

Hour

IP

IP

lOa

5p

6p

IP

Gage 

height Discharge

June 10

3.00

Jui

3.10

Jui

3.08

Jui

3.40

Jui

4.10

40

le 11

49

16 12

47

16 13

82

ie 14

June 15

3.35 76

Hour

lla

N

lp

N

6p

4p

Gage 

height

June

3.24

June

3.16

June

3.12

June

3.04

June

3.04

Discharge

! 16

63

i 17

55

i 18

51

i 19

44

20

44

June 21

3.40 82
FEND OREILLE RIVER BASIN 97

Middle Pork Rook Creek near Philipsburg, Mont.

Location.- Lat. 46°11', long. 113°30', in NE£ sec. 17, T. 5 N., R. 15 W., half a mile

upstream from East Pork, 2£ miles upstream from West Pork, and 15 miles southwest of

Philipsburg.

Drainage area.- 123 square miles. 

Gage-height record.- Staff gage read twice daily. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

550 second-feet and extended to peak stage on basis of logarithmic plotting and

slope-area measurement. Gage heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 1,360 second-feet 6:15 p.m. May 29 (gage height, 3.80

feet), by slope-area method.

1937 to April 1948: Discharge observed, 1,230 second-feet May 9, 1947 (gage

height, 3.60 feet). 

Remarks.- A few small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

184

178

175

175

164

170

192

200

195

198

June

1,120

1,130

1,240

1,230

1,080

967

985

1,020

925

854

July

388

412

408

400

388

353

306

275

255

249

Day

11

12

18

14

15

16

17

1ft

19

20

May

200

206

239

236

242

268

353

517

690

985

June

810

832

733

570

503

494

485

480

467

433

July

246

236

233

221

209

206

203

198

189

178

Day

21

22

28

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ........... .................... . .............. . ....................

Runoff, in inches............................................................................................................................

May

1,030

1,080

1,100

1,020

997

1,140

1,310

1,310

1,330

1,150

1,100

591

5.53

June

467

508

550

555

541

522

472

429

412

376

-

706

6.40

July

178

178

170

164

162

156

151

154

164

164

162

237

2.22

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

9

7

10

8

9

5

10

5

9

4

8

4

9

5

7

4

10

9

hej^t | Discharge

May 17

1.88 331

2.00 376

May 18

2.30 503

2.36 531

May 19

2.56 630

2.80 755

May 20

3.20 985

3.20 985

May 21

3.26 1,020

3.28 1,030

May 22

3.30 1,040

3.40 1,100

May 23

3.40 1,100

3.38 1,090

May 24

3.34 1,070

3.18 973

May 25

3.24 1,010

3.20 985

Hour

10

7

9

6

10

5

7

6

8

8

8

7

10

6

9

6

9

8

Gage

height

ME

3.52

3.40

Discharge

iy 26

1,180

1,100

May 27

3.76

3.70

1,330

1,300

May 28

3.74

3.72

1,320

1,310

May 29

3.72

3.80

1,310

1,360

May 30

3.54

3.40

1,190

1,100

May 31

3.40

3.40

1,100

1,100

June 1

3.44

3.42

1,130

1,120

June 2

3.44

3.44

1,130

1,130

June 3

3.60

3.64

1,230

1,260

Hour

10

8

8a

9P

9

5

10

7

8

6

9

9

8

4

10

4

9

7

Gage 

height

Ji

3.70

3.50

Discharge

ine 4

1,300

1,160

June 5

3.50

3.20

1,160

985

June 6

3.20

3.14

985

949

June 7

3.20

3.20

985

985

June 8

3.26

3.24

1,020

1,010

June 9

3.20

3.00

985

865

June 10

2.98

2.98

854

B54

June 11

2.90

2.90

810

810

June 12

2.94

2.94

832

832

Hour

10

8

7

7

8

6

8

8

8

5

8

6

7

7

9

7

9

6

Gage 

height

June

2.80

2.72

June

2.55

2.34

June

2.30

2.30

June

2.28

2.28

June

2.26

2.26

June

2.26

2.24

June

2.24

2.20

June

2.10

2.18

June

2.20

2.24

Discharge

13

755

711

14

625

522

15

503

503

16

494

494

17

485

485

18

485

476

19

476

458

20

416

450

21

458

476
98 FLOODS OP MAY-JUME 1948 IN COLUMBIA RIVER BASIN

Blackfoot River near Helmville, Mont.

Location.- Lat. 46°56', long. 112°57', in NW£SW£ sec. 25, T. 14 N., R. 11 W., 2 miles

downstream from Arrastre Creek and 5 miles northeast of Helmville. Datum of gage is

4,301.29 feet above mean sea level, datum of 1929 (levels by Corps of Engineers). 

Drainage area.- 481 square miles. 

Gage-height record.- Water-stage recorder graph except for period 8 a.m. June 4 to

8 a.mT June 6, for which graph was drawn based on fragmentary gage-height record. 

Discharge record.- Stage-discharge relation defined by current-meter measurements

below 2,500 second-feet and extended to peak stage by logarithmic plotting. Gage

heights used to hundredths.

 feeT). Maxima.- May-June 1948: Discharge, 3,180 second-feet 4 a.m. June 6 (gage height, 7.55 

1940 to April 1948: Discharge, 3,080 second-feet June 15, 1943 (gage height,

7.33 feet). 

Remarks.- Plow includes natural overflow channel on left bank, but does not include

unnamed diversions past station. Flood flow not materially affected by storage or

diversion.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

498

504

484

487

484

477

511

681

808

769

June

2,210

2,140

2,150

2,660

3,010

3,090

2,820

2,560

2,350

2,180

July

1,080

1,070

985

926

854

786

739

702

664

640

Day

11

12

13

14

15

16

17

18

19

20

May

739

727

735

818

921

916

936

1,170

1,680

2,170

June

2,030

1,880

1,660

1,520

1,380

1,280

1,300

1,240

1,150

1,100

July

644

672

609

579

558

554

536

522

550

620

Day^

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .. . .... . ... ...............................................

Runoff, in inches ................................................ ...........................................................................

May

2,450

2,690

2,900

2,670

2,420

2,440

2,530

2,600

2,580

2,510

2,330

1,440

3.45-

June

1,080

1,160

1,360

1,600

1,680

1,580

1,470

1,320

1,210

1,120

1,776

4.12

July

576

525

504

500

475

451

438

451

482

462

428

632

1.51

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.76 

3.76 

3.79 

3.83 

3.88 

3.93

912 

912 

926 

945 

970 

995

May 23

7.18 

7.19 

7.17 

7.16 

7.11 

7.05

2,920 

2,920 

2,910 

2,900 

2,870 

2,830

May 29

6.69 

6.66 

6.65 

6.65 

6.64 

6.62

Ju

6.55 

6.70 

6.81 

6.92 

7.02 

7.10

2,600 

2,580 

2,570 

2,570 

2,570 

2,550

ne 4

2,510 

2,600 

2,680 

2,750 

2,810 

2,860

June 10

6.11 

6.05 

6.02 

6.03 

6.02 

5.97

2,220 

2, '180 

2,160 

2,170 

2,160 

2,130

June 16

4.53 

4.50 

4.48 

4,47 

4.49 

4.53

1,300 

1,280 

1,270 

1,260 

1,280 

1,300

Gage 

height Discharge

May 18

4.00 

4.09 

4.24 

4.42 

4.58 

4.74

1,030 

1,080 

1,150 

1,240 

1,320 

1,410

May 24

6.96 

6.88 

6.80 

6.72 

6.66 

6.57

2,770 

2,720 

2,670 

2,620 

2,580 

2,520

May 30

6.61 

6.61 

6.58 

6.53 

6.46 

3.42

Ju

7.18 

7.25 

7.33 

7.40 

7.45 

7.50

2,550 

2,550 

2,530 

2,490 

2,450 

2,420

ne 5

2,920 

2,960 

3,020 

3,070 

3,100 

3,140

June 11

5.89 

5.83 

5.79 

5.76 

5.74 

5.69

2,080 

2,050 

2,020 

2,010 

1,990 

1,960

June 17

4.57 

4.57 

4.56 

4.54 

4.50 

4.50

1,320 

1,320 

1,310 

1 , 300 

1,280 

1,280

height Discharge

May 19

4.89 

5.06 

5.27 

5.33 

5.52 

5.70

1,490 

1,590 

1,690 

1,750 

1,860 

1,970

May 25

6.47 

6.41 

6.39 

6.39 

6.39 

6.39

2,460 

2,420 

2,400 

2,400 

2,400 

2,400

May 31

6.36 

6.30 

6.25 

6.23 

6.22 

6.19

2,380 

2,340 

2,310 

2,300 

2,290 

2,270

June 6

7.55 

7.49 

7.43 

7.38 

7.33 

7.27

3,180 

3,130 

3,090 

3,060 

3,020 

2,980

June 12

5.66 

5.62 

5.58 

5.51 

5.43 

5.35

1,950 

1,920 

1,900 

1,860 

1,810 

1,760

June 18

4.46 

4.43 

4.41 

4.38 

4.36 

4.32

1,260 

1,240 

1,240 

1,220 

1,210 

1,190

Gage 

height Discharge

May 20

5.83 

5.95 

6.03 

6.14 

6.22 

6.29

2,050 

2,120 

2,170 

2,240 

2,290 

2,340

May 26

6.37 

6.38 

6.42 

6.49 

6.51 

6.54

2,390 

2,400 

2,420 

2,470 

2,480 

2,500

June 1

6.13 

6. '08 

6.08 

6.08 

6.07 

6.05

2,230 

2,200 

2,200 

2,200 

2,200 

2,180

June 7

7.18 

7.10 

7.03 

6.95 

6.90 

6.84

2,920 

. 2,860 

2,820 

2,770 

2,740 

2,700

June 13

5.26 

5.19 

5.16 

5.13 

5.10 

5.07

1,710 

1,660 

1,650 

1,630 

1,610 

1,590

June 19

4.28 

4.26 

4.23 

4.22 

4.20 

4.19

1,170 

1,160 

1,140 

1,140 

1,130 

1,120

Gage 

height Discharge

May 21

6.35 

6.41 

6.46 

6.51 

6.55 

6.62

2,380 

2,420 

2,450 

2,480 

2,510 

2,550

May 27

6.53 

6.52 

6.57 

6.63 

6.66 

6.70

Ju

6.02 

5.98 

5.97 

5.98 

5.97 

5.93

Ju

6.77 

6.67 

6.62 

6.57 

6.53 

6.47

2,490 

2,490 

2,520 

2,560 

2,580 

2,600

ne 2

2,160 

2,140 

2,130 

2,140 

2,130 

2,110

ne 8

2,650 

2,590 

2,550 

2,520 

2,490 

2,460

June 14

5.03 

5.00 

4.95 

4.89 

4.85 

4.81

1,570 

1,560 

1,530 

1,490 

1,470 

1,450

June 20

4.16 

4.14 

4.13 

4.12 

4.09 

4.05

1,110 

1,100 

1,100 

1,090 

1,080 

1,060

Gage 

height

M<

6.66 

6.71 

6.78 

6.92 

7.05 

7.13

Discharge

jy22

2,580 

2,610 

2,660 

2,750 

2,830 

2,880

May 28

6.70 

6.68 

6.70 

6.72 

6.69 

6.68

Ju

5.89 

5.90 

5.93 

6.01 

6.08 

6.33

Ji.

6.39 

6.34 

6.28 

6.26 

6.23 

S.18

2,600 

2,590 

2,600 

2,620 

2,600 

2,590

ne3

2,080 

2,090 

2,110 

2,160 

2,200 

2,360

ne 9

2,400 

2,370 

2,330 

2,320 

2,300 

2,270

June 15

4.73 

4.69 

4.68 

4.67 

4.61 

4.57

1,410 

1,380 

1,380 

1,370 

1,340 

1,320

June 21

4.02 

4.02 

4.08 

4.15 

4.24 

4.26

1,040 

1,040 

1,070 

1,100 

1,150 

1,160
PEKD OREILLE RIVER BASIN 99

Blackfoot River near Ovando, Mont.

Location.- Lat. 47°01', long. 113°07', in SE^NW^ sec. 34, T. 15 N., R. 13 W., a quarter 

of a mile upstream from Monture Creek and 5 miles west of Ovando. Datum of gage is 

3,917.27 feet above mean sea level, datum of 1929 (Corps of Engineers bench mark).

Drainage area.- 1,280 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

6,700 second-feet and extended to peak stage. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 8,200 second-feet 10 a.m. May 22 (gage height, 

6.84 feet).

1940 to April 1948: Discharge, 6,950 second-feet June 20, 1943 (gage height, 

6.26 feet).

Ploodmarks indicate stage of 10 feet reached in recent years.

Remarks.- Flood flow not materially affected by storage or diversion.

Mean discharge, in second-feet, 19&8

Day

1

2

3

4

5

6

7

8

9

10

May

1,360

1,380

1,340

1,350

1,350

1,360

1,480

1,920

2,180

2,120

June

5,650

5,370

5,620

6,870

6,990

6,650

6,260

5,670

5,220

4,850

July

2,140

2,100

2,010

1,920

1,820

1,690

1,600

1,520

1,420

1,340

Day

11

12

18

14

15

16

17

18

19

20

May

2,090

1,990

1,980

2,020

2,050

2,100

2,300

3,170

4,350

5,150

June

4,460

4,040

3,660

3,350

3,080

2,900

2,870

2,730

2,560

2,430

July

1,310

1,370

1,310

1,240

1,190

1,170

1,130

1,100

1,180

1,310

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...................................... .........................................

Runoff, in inches ............................................................................................................................

May

5,850

7,890

7,570

7,000

6,570

6,500

6,630

6,660

6,600

6,090

5,830

3,740

3.37

June

2,360

2,440

2,610

2,880

2,970

2,860

2,730

2,570

2,390

2,240

3,909

3.40

July

1,280

1,170

1,100

1,070

1,030

983

950

961

1,000

1,020

961

1,335

1.20

Gage height, infect, and discharge, in second-feet, at indicated time,

*-l

W

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.08 

4.12 

4.14 

4.15 

4.18 

4.31

2,210 

2,270 

2,300 

2,320 

2,360 

2,570

May 23

6.65 

6.65 

6.59 

6.56 

6.52 

6.53

Mi

6.25 

6.25 

6.21 

6.22 

6.20 

6.16

Ju

6.23 

6.30 

6.34 

6.38 

6.42 

6.43

7,710 

7,710 

7,550 

7,480 

7,370 

7,400

iy29

6,670 

6,670 

6,570 

6,590 

6,540 

6,440

ne 4

6,620 

6,800 

6,900 

7,010 

7,110 

7,140

June 10

5.56 

5.56 

5.51 

5.45 

5.39 

5.36

5,010 

5,010 

4,900 

4,770 

4,640 

4,580

June 16

4.52 

4.52 

4.51 

4.49 

4.49 

4.50

2,920 

2,920 

2,900 

2,860 

2,860 

2,880

Gage 

height Discharge

May 18

4.51 

4.62 

4.68 

4.72 

4.78 

4.94

2,900 

3,100 

3,200 

3,280 

3,390 

3,710

May 24

6.52 

6.46 

6.37 

6.28 

6.23 

6.26

Mi

6.11 

6.06 

6.00 

5.95 

5.91 

5.93

7,370 

7,220 

6,980 

6,750 

6,620 

6,700

iy30

6,320 

6,200 

G,u60 

5,940 

5,840 

5,890

June 5

6.43 

6.42 

6.39 

6.35 

6.30 

6.28

7,140 

7,110 

7,030 

6,930 

6,800 

6,750

June 11

5.37 

5.36 

5.31 

5.27 

5.23 

5.20

4,600 

4,580 

4,470 

4,390 

4,300 

4,240

June 17

4.53 

4.55 

4.49

4.47 

4.46 

4.46

2,930 

2,970 

2,860 

2,830 

2,810 

2,810

Gage 

height Discharge

May 19

5.08 

5.18 

5.26 

5.32 

5.42 

5.53

3,990 

4,200 

4,370 

4,490 

4,700 

4,950

May 25

6.31 

6.28 

6.22 

6.14 

6.09 

6.16

M;

5.96 

5.96 

5.91 

5.87 

5.83 

5.86

6,830 

6,750 

6,590

o , 400 

6,280 

6,440

iy 31

5,960 

5,960 

5,840 

5,750 

5,650 

5,720

June 6

6.28 

6.27 

6.26 

6.22 

6.19 

6.20

6,750 

6,720 

6,700 

6,590 

6,520 

6,540

June 12

5.18 

5.14 

5.11 

5.07 

5.02 

4.99

4,200 

4,110 

4,050 

3,970 

3,870 

3,810

June 18

4.45 

4.44 

4.42

4.39 

4.37 

4.35

2,800 

2,780 

2,740 

2,690 

2,660 

2,630

Gage 

height Discharge

May 20

5.57 

5.58 

5.62 

5.65 

5.67 

5.71

5,030 

5,060 

5,150 

5,220

5,270 

5,360

May 26

6.23 

6.25

6.21 

fa. 14 

6.10 

6.18

Ju

5.89 

5.89 

5.85 

5.79 

5.74 

5.75

6,620 

6,670 

6,570 

6,400 

6,300 

6,490

ne 1

5,800 

5,800 

5,700 

5,560 

5,440 

5,460

June 7

6.19 

6.17 

6.10 

6.02 

5.95 

5.93

6,520 

6,470 

6,300 

6,110 

5,940 

5,890

June 13

4.97 

4.95 

4.92 

4.89 

4.86 

4.84

3,770 

3,730 

3,670 

3,610

3,550 

3,510

June 19

4.34 

4.32 

4.30 

4.29 

4.27 

4.26

2,610 

2,580 

2,550 

2,530 

2,500 

2,490

Gage 

height Discharge

May 21

5.77 

5.81 

5.85 

5.90 

6.05 

6.45

5,510 

5,600 

5,700 

5,820 

6,180 

7,190

May 27

6.25 

6.26 

6.26 

6.23 

6.20 

6.23

6,670 

6,700 

6,700 

6,620 

6,540 

6,620

June 2

5.78 

5.76 

5.73 

5.68 

5.64 

5.64

Ju

5.93 

5.90 

5.85 

5.78 

5.73 

5.73

5,530 

5,480 

5,410 

5,290 

5,200 

5,200

ne8

5,890 

5,820 

5,700 

5,530 

5,410 

5,410

June 14

4.82 

4.79 

4.77 

4.72 

4.69 

4.67

3,470 

3,410 

3,370 

3,280 

3,220 

3,190

June 20

4.25 

4.24 

4.23 

4.20 

4.19 

4.19

2,470 

2,450 

2,440 

2,390 

2,380 

2,380

Gage 

height Discharge

May 22

6.66 

6.81 

6.82 

6.75 

6.70 

L6.68

7,740 

8,130 

8,150 

7,970 

7,840 

/,7SO

May 28

6.26 

6.28 

6.26 

6.24 

6.21 

6.24

6,700 

6,750 

6,700 

6,640 

6,570 

6,640

June 3

5.67 

5.71 

5.74 

5.87 

6.00 

6.16

5,270 

5,360 

5,440 

5,750 

6,060 

6,440

June 9

5.74 

5.71 

5.66 

5.60 

5.56 

5.55

5; 440 

5,360 

5,240 

5,100 

5,010 

4,990

June 15

4.66 

4.64 

4.62 

4.59 

4.56 

4.54

3,170 

3,130 

3,100 

3,040 

2,990 

2,950

June 21

4.18 

4.17 

4.17 

4.16 

4.19 

4.21

2,360 

2,340 

2,340 

2,330 

2,380 

2,410

Supplemental record.- May 22, 10 a.m., 6.84 ft., 8,200 sec.-ft.; June 4, 9 p.m. to 

June 5, 7 a.m., 6.43 ft., 7,140 sec.-ft.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Blackfoot River near Bonner, Mont.

Location.- Lat. 46°54', long. 113°47', in SW^SWi sec. 8, T. 13 N., R. 17 W., 4 miles

northeast of Bonner, 6 miles downstream from Union Creek, and 6 miles upstream from

mouth .

Drainage area.- 2,280 square miles. 

Gage-height record.- Staff gage read once daily. Mean daily gage heights May 17 to

June 21 computed from graph based on gage readings, floodmark, and records for

station near Ovando and Clark Pork above Missoula. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

12,000 second- feet and extended to peak stage. Gage heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 16,300 second-feet 10 a.m. May 22 (gage height,

11.3 feet, from floodmark).

1939 to April 1948: Discharge observed, 12,800 second-feet May 9, 1947 (gage

height, 9.90 feet). 

Remarks . - Flood flow not materially affected by diversions or artificial storage.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

3,920

4,240

4,020

4,080

3,920

3,890

4,380

6,110

6,300

5,980

June

11,200

10,800

11,000

12,300

12,400

11,600

10,700

10,100

9,560

9,100

July

3,320

3,080

3,050

3,030

2,870

2,670

2,540

2,430

2,300

2,240

Day

11^?.

13

14

15

16

17

18

19

20

May

5,920

5,580

5,680

5,760

5,700

5,640

5,890

7,260

9,060

10,900

June

8,580

7,900

7,260

6,670

6,300

6,050

5,760

5,460

5,010

4,750

July

2,140

2,100

2,060

2,030

1,960

1,850

1,780

1,720

1,780

2,020

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

12,200

15,200

13,700

13,000

12,500

12,300

12,600

13,100

13,000

12,300

11,600

8,249

4.17

June

4,470

4,410

4,520

4,780

4,660

4,470

4,360

4,080

3,790

3,600

-

7,188

3.51

July

1,940

1,810

1,760

1,670

1,600

1,550

1,520

1,520

1,600

1,560

1,580

2,099

1.06

Gage height, in feet, and discharge, in second-feet, at indicated time, 19^8

Hour

8

8

8

8

8

8

8

8

8

Gage 

height

May 

6.48

May 

7.54

May 

8.56

May 

9.32

May 

9.93

May 

10.62

May 

10.23

May 

9.93

May 

9.71

Discharge

17 

6,050

18 

7,790

19 

9,820

20 

11,400

21 

12,800

22 

14,500

23 

13,600

24 

12,800

25 

12,300

Hour

8

8

8

8

8

8

8

a

2P

8

Gage 

height Discharge

May 26 

9.74 12,400

May 27 

9.94 12,900

May 28 

10.13 13,300

May 29 

9.94 12,900

May 30 

9.55 12,000

May 31 

9.36 11,500

June 1 

9.16 11,100

June 2 

8.98 10,700

June- 3 

9.08 10,900

9.32 11,400

Hour

8

7

7

7

8

8

7

7

7

Gage 

height Discharge

June 4

9.80 12,500

June 5 

9.69 12,300

June 6 

9.24 11,300

June 7 

8.89 10,500

June 8 

8.61 9,920

June 9 

8.34 9,350

June 10 

8.18 9,020

June 11 

7.82 8,310

June 12 

7.48 7,690

Hour

8

8

8

8

8

8

8

8

8

Gage 

height Discharge

June 13 

7.10 7,040

June 14 

6.76 6,500

June 15 

6.58 6,210

June 16 

6.41 5,940

June 17 

6.26 5,700

June 18 

5.27 5,280

June 19 

5.72 4,890

June 20 

5.58 4,690

June 21 

5.36 4,380

Note.- All readings made after noon.
PEND OREILLE RIVER BASIN 101

Nevada Creek above reservoir, near Finn, Mont.

Location.- Lat. 46°47', long. 112°46', in SVf£ sec. 20, T. 12 N., R. 9 W., 2 miles upstream from Buffalo Creek and 3 miles west of Finn. 

Drainage area.- 128 square miles. 

gage-height record.- Water-stage recorder graph. 

Discharge record. -"Stage-discharge relation defined by current-meter measurements below

330 second-feet and extended to peak stage. Gage heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 557 second-feet 2 p.m. May 22 (gage height, 4.22

1939 to April 1948: Discharge, 1,440 second-feet Apr. 16, 1948 (gage height, 6.04 

feet). 

Remarks.- Flood flow not materially affected by diversions.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

121

108

95

99

91

86

117

246

272

228

June

224

194

213

273

284

265

218

177

150

128

July

100

119

92

78

68

61

58

57

54

52

Day

11

12

13

14

15

16

17

18

19

20

May

202

157

146

159

153

1*5

170

294

444

491

June

137

146

118

105

85

99

163

100

89

87

July

66

65

54

49

47

47

44

44

64

63

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ........................................................... ...................

Runoff, in inches ...........................................................................................................................

May

465

532

477

381

327

314

308

315

320

285

255

252

2.27

June

93

95

142

145

148

170

137

117

99

92

150

1.31

July

54

47

46

48

41

37

38

44

55

47

39

57.4

0.52

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.72 

2.77 

2.82 

2.87 

2.91 

2.98

152 

161 

170 

179 

187 

202

May 23

4,10 

4.03 

4.00 

4.94 

3.88 

3.83

M

3.45 

3.45 

3.49 

3.54 

3.49 

3.43

Jl

3.13 

3.31 

3.38 

3.36 

3.34 

3.35

Ju

2.60 

2.60 

2.60 

2.54 

2.51 

2.55

515 

490 

480 

459 

439 

424

iy29

312 

312 

322 

337 

322 

308

ne4

235 

278 

295 

290 

285 

288

nelO

132 

132 

132 

124 

119 

125

June 16

2.18 

2.19 

2.20 

2.18 

2.66 

2.92

79 

80 

81 

79 

142 

189

Gage 

height Discharge

May 18

3.08 

3.22 

3.42 

3.53 

3.60 

3.67

Ma

3.78 

3.74 

3.70 

3.65 

3.57 

3.54

224 

255 

305 

334 

355 

376

iy24

409 

397 

385 

370 

346 

337

May 30

3. -39 

3.36 

3.35 

3.31 

3.28 

3.27

Ju

3. .32 

3.32 

3.34 

3.35 

3.34 

3.35

Ju

2.57 

2.57 

2.56 

2.54 

2.77 

2.90

298 

290 

288 

278 

270 

268

ne5

280 

230 

285 

238 

285 

288

ne 11

128 

128 

126 

124 

161 

185

June 17

3.00 

2.84 

2.77 

2.75 

2.58 

2.47

206 

174 ni

157 

129

114

Gage 

height Discharge

May 19

3.73 

3.81 

3.89 

3.93 

4.06 

4.12

394 

418 

442 

456 

501 

522

May 25

3.52 

3.52 

3.53 

3.50 

3.46 

3.45

M£

3.26 

3.25 

3.23 

3.20 

3.16 

3.13

331 

331 

334 

325 

315 

312

iy31

265 

262 

258 

250 

241 

235

June 6

3.32 

3.30 

3.28 

3.24 

3.17 

3.13

280 

275 

270 

260 

243 

235

June 12 1

2.83 

2.75 

2.67 

2.61 

2.52 

2.45

172 

157 

143 

134 

121 

112

June 18

2.43 

2.39 

2.36 

2.33 

2.28 

2.27

109 

104 

100 

97 

91 

89

Gage 

height Discharge

May 20

4.11 

4.08 

4.04 

3.99 

3.95 

3.93

518 

508 

494 

476 

462 

456

May 26

3.45 

3.47 

3.49 

3.47 

3.43- 

3.42

312 

318 

322 

318 

303 

305

June 1

3.12 

3.10 

3.10 

3.07 

3.04 

3.00

232 

228 

228 

221 

215 

206

June 7

3.11 

3.10 

3.08 

3.04 

2.97 

2.93

230 

228 

224 

215 

290 

191

June 13

2.43 

2.48 

2.57 

2.56 

2.51 

2.48

109 

115 

128 

126 

119 

115

June 19

2.26 

2.25 

2.29 

2.28 

2.27 

2.25

88 

87 

92 

91 

89 

87

Gage 

height Discharge

May 21

3.93 

3.95 

3.97 

3.96 

3.95 

4.04

456 

462 

470 

466 

462 

494

May 27

3.43 

3.45 

3.46 

3.44 

3.41 

3.39

308 

312 

315 

310 

302 

298

June 2

2.97 

2.96 

2.96 

2.94 

2.89 

2.87

Ju

2.90 

2.90 

2.89 

2.83 

2.78 

2.76

200 

198 

198 

193 

183 

179

ne8

185 

185 

183 

172 

162 

159

June 14

2.45 

2.44 

2.43 

2.38 

2.32 

2.27

112 

110 

109 

103 

95 

89

June 20

2.25 

2.25 

2.24 

2.26 

2.25 

2.23

87 

87 

86 

88 

87 

85

Gage 

height Discharge

May 22

4.07 

4.14 

4.20 

4.20 

4.18 

4.15

504 

529 

550 

550 

543 

532

May 28

3.40 

3.40 

3.44 

3.52 

3.53 

3.49

300 

300 

310 

331 

334 

322

June 3

2.87 

2.95 

3.08 

3.20 

3.12 

3.06

Ju

2.76 

2.75 

2.74 

2.69 

2.64 

2.61

Ju

2.26 

2.26 

2.26 

2.21 

2.18 

2.17

179 

196 

224 

250 

232 

219

me 9

159 

157 

155 

146 

138 

134

ne 15

88 

88 

88 

82 

79 

78

June 21

2.22 

2.23 

2.32 

2.38 

2.36 

2.33

83 

85 

95 

103 

100 

97

Supplemental record.- May 19, 11 p.m., 4.13 ft., 526 sec.-ft.; May 22, 2 p.m., 4.22 

ft., 557 sec.-ft.; May 28, 6 p.m., 3.55 ft., 340 sec.-ft.; June 12, 6 a.m., 2.43 ft., 

109 sec.-ft., 2 p.m., 2.58 ft., 129 sec.-ft.; June 16, 6 p.m., 2.32 ft., 95 sec.-ft., 

10 p.m., 2.88 ft., 181 sec.-ft.; June 17, 11 a.m., 2.76 ft., 159 sec.-ft., 2 p.m., 2.81 

ft., 168 sec.-ft.
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Nevada Creek near Helmville, Mont.

Location.- Lat. 46°49', long. 112°52', in SW£ sec. 4, T. 12 N., R. 10 W., 2 miles downstream from Nevada Creek Reservoir and 6 miles southeast of Helmville.

Drainage area.- 165 square miles.

Gage-height "record.- Staff gage read once dally. No gage-height record June 1, 2, July 

13-167 21-25, 27, 29, 30.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

220 second-feet and extended to peak stage. Stage-discharge relation uncertain July 

4-8. Discharge for periods of uncertain stage-discharge relation and no gage-height 

record computed on basis of records for station above reservoir near Finn. Gage 

heights used to hundredths. Shifting-control method used June 9 to July 3.

Maxima.- May-June 1948: Discharge, 470 second-feet probably on May 22 (gage height, 

5.3 feet, from floodmark).

1946 to April 1948: Discharge observed, 260 second-feet June 13, 1947 (gage 

height, 4.22 feet).

Maximum stage known, about 6 feet, from Information by local resident.

Remarks.- Almost complete regulation by Nevada Creek Reservoir. Several diversions 

above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May June

190

170

176

210

208

205

200

183

155

132

July

94

93

103

90

75

60

55

53

52

52

Day

11

12

13

14

15

16

17

18

19

20

May June

108

July

89 nel 98

113

110

94

97

103

101

93

85

75

65

60

60

57

63

67

89

Day

?,l

?,?,

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .... . ........... ....................... ...........

Runoff, in inches ............................................................... ............................................................

May

-

June

86

94

100

107

116

113

130

114

108

101

-

131

-

July

70

60

55

60

60

57

53

50

60

57

54

673
FEUD OREILLE RIVER BASIN 103

West Pork Bitterroot River near Conner, Mont.

Location.- Lat. 45°44', long. 114*17 ', in NE&Wj- sec. 26, T. 1 S., R. 22 W. , half a 

mile below West Pork Dam, 6 miles upstream from Nez Perce Creek, and 16 miles 

southwest of Conner.

Drainage area.- 322 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 3,880 second-feet 5 p.m. May 29 (gage height, 6.08

1941 to April 1948: Discharge, 4,020 second-feet May 9, 1947 (gage height, 6.17 

feet).

Remarks.- Flood flow affected by West Pork Bitterroot River Reservoir, 0.3 mile 

upstream.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

281

281

281

281

281

281

281

281

284

288

June

2,590

2,530

2,600

2,550

2,230

2,000

1,890

1,840

1,710

1,550

July

536

531

502

478

442

406

384

367

342

330

Day

11

12

13

14

15

16

17

18

19

20

May

296

274

699

870

916

988

1,320

1,970

2,360

2,940

June

1,400

1,280

1,140

1,030

964

910

868

790

786

751

July

326

326

299

288

277

263

256

256

270

277

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ....................................................... .......................

Runoff, in inches ............................................................................................................................

May

3,020

3,020

2,770

2,510

2,540

2,840

2,990

3,190

3,710

3,390

2,900

1,559

5.58

June

768

. 838

819

789

760

721

672

622

580

545

1,284

4.45

July

256

235

221

215

202

192

188

202

228

215

192

307

1.10

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.58 

3.71 

3.78 

3.85 

3.93 

4.10j

1,150 

1,260 

1,320 

1,380 

1,450 

1,600

May 23

5.32 

5.28 

5.22 

5.16 

5.10 

5.08

Mi

5.82 

5.94 

6.06 

6.06 

6.04 

5.95

Ji

5.12 

5.08 

5.03 

4.98 

4.93 

4.89

2,890 

2,850 

2,770 

2,700 

2,630 

2,610

iy29

3,520 

3,690 

3,850 

3,850 

3,830 

3,700

ne4

2,650 

2,610 

2,550 

2,500 

2,440 

2,400

June 10

4.11 

4.09 

4.05 

4.00 

3.96 

3.92

Ju

3.28 

3.24 

3.22 

3.20 

3.19 

3.20

1,610 

1,590 

1,560 

1,510 

1,470 

1,440

ne!6

942 

916 

903 

890 

884 

890

heigft | D**"*

May 18

4.27 

4.40 

4.53 

4.61 

4.66 

4.72

Mi

5.07 

5.03 

4.99 

4.94 

4.91 

4.95

Mi

5.88 

5.81 

5.72 

5.63 

5.55 

5.50

1,760 

1,880 

2,010 

2,090 

2,150 

2,210

iy24

2,600 

2,550 

2,510 

2,450 

2,420 

2,460

iy30

3,600 

3,500 

3,390 

3,270 

3,170 

3,110

June 5

4.86 

4.80 

4.73 

4.67 

4.63 

4.61

Ju

3.90 

3.89 

3.87 

3.88 

3.87 

3.86

Ju

3.20 

3.20 

3.18 

3.15 

3.12 

3.10

2,370 

2,300 

2,220 

2,160 

2,110 

2,090

nell

1,420 

1,410 

1,390 

1,400 

1,390 

1,390

ne!7

890 

890 

877 

858 

838 

825

Gage 

height Discharge

May 19

4.77 

4.80 

4.83 

4.86 

4.95 

5.08

2,270 

2,300 

2,330 

2,370 

2,460 

2,610

May 25

4.99 

5.02 

5.03 

5.03 

5.03 

5.12

Me

5.45 

5.40 

5.33 

5.23 

5.18 

5.15

2,510 

2,540 

2,550 

2,550 

2,550 

2,650

iy31

3,050 

2,990 

2,910 

2,790 

2,730 

2,690

June 6

4.60 

4.56 

4.52 

4.47 

4.43 

4.44

Ju

3.83 

3.78 

3.73 

3.68 

3.63 

3.59

2,080 

2,040 

2,000 

1,950 

1,910 

1,920

ne!2

1,360 

1,320 

1,280 

1,230 

1,190 

1,160

June 18

3.09 

3.06 

3.04 

3.01 

3.00 

2.99

819 

801 

789 

771 

765 

760

Gage 

height Discharge

May 20

5.23 

5.34 

5.42 

5.45 

5.45 

5.46

2,790 

2,920 

3,010 

3,050 

3,050 

3,060

May 26

5.20 

5.26 

5.30 

5.30 

5.33 

5.37

Ju

5.14 

5.10 

5.07 

5.02 

4.99 

5.00

Jl

4.45 

4.43 

4.40 

4.39 

4.36 

4.37

2,750 

2,820 

2,870 

2,870 

2,910 

2,950

me 1

2,680 

2,630 

2,600 

2,540 

2,510 

2,520

ne 7

1,930 

1,910 

1,880 

1,870 

1,840 

1,850

June 13

3.58 

3.57 

3.56 

3.55 

3.53 

3.51

1,150 

1,150 

1,140 

1,130 

1,110 

1,100

June 19

3.02 

3.05 

3.06 

3.04 

3.03 

3.03

777 

795 

801 

789 

783 

783

Gage 

height Discharge

May 21

5.48 

5.46 

5.42 

5.38 

5.37 

5.40

3,090 

3,060 

3,010 

2,970 

2,950 

2,990

May 27

5.41 

5.43 

5.40 

5.39 

5.38 

5.44

Ju

5.04 

5.05 

5.02 

4.99 

4.96 

4.98

3,000 

3,030 

2,990 

2,980 

2,970 

3,040

ne2

2,560 

2,580 

2,540 

2,510 

2,480 

2,500

June 8

4.39 

4.38 

4.35 

4.36 

4.32 

4.30

Ju

3.47 

3.44 

3.41 

3.38 

3.34 

3.31

1,870 

1,860 

1,830 

1,840 

1,800 

1,780

nel4

1,070 

1,050 

1,030 

1,010 

981 

962

June 20

3.01 

2.98 

2.97 

2.96 

2.94 

2.94

771 

754 

748 

743 

732 

732

Gage 

height

Mi

5.44 

5.45 

5.45 

5.43 

5.39 

5.36

Discharge

iy22

3,040 

3,050 

3,050 

3,030 

2,980 

2,940

May 28

5.51 

5.57 

5.59 

5.58 

5.59 

5.67

3,120 

3,190 

3,220 

3,210 

3,220 

3,320

June 3

5.03 

5.07 

5.10 

5.08 

5.09 

5.14

Ji

4.29 

4.27 

4.22 

4.18 

4.14 

4.13

2,550 

2,600 

2,630 

2,610 

2,620 

2,680

ne9

1,780 

1,760 

1,710 

1,670 

1,640 

1,630

June 15

3.31 

3.31 

3.33 

3.33 

3.30 

3.30

962 

962 

974 

974 

955 

955

June 21

2.94 

2.95 

2.98 

3.03 

3.08 

3.12

732 

738 

754 

783 

813 

838

Supplemental record.- May 28, 6 p.m., 5.55 ft., 3,170 sec.-ft.; May 

ft., 3,800 sec".-ft., 5 p.m., 6.08 ft., 3,880 sec.-ft.

29, 2 p.m., 6.02
104 FLOODS OP MAY-JUNE 1948 IK COLUMBIA RIVER BASIN

Bitterroot River near Darby, Mont.

Location.- Lat. 45°59', long. 114°09', in NE£ sec. 36, T. 3 N., R. 21 W., Just below

bridge on U. S. Highway 93, a quarter of a mile downstream from Chaffin Creek and

4 miles southeast of Darby. 

Drainage area.- 1,050 square miles. 

gage-height record.- Water-stage recorder graph except for period 3 a.m. to 4 p.m.

May 20, and 4 p.m. July 22 to 4 p.m. July 25, for "which graph was drawn based on

observer's reading and fragmentary gage-height record. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

10,900 second-feet and extended to peak stage. Gage heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 11,300 second-feet 11 a.m. May 29 (gage height, 8.12

1937 to April 1948: Discharge, 11,500 second-feet May 9, 1947 (gage height, 8.18 

feet).

Remarks.- Flood runoff affected slightly by artificial storage. Many diversions above 

station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,720

1,550

1,460

1,460

1,380

1,450

1,900

2,340

2,160

2,010

June

8,460

8,260

8,620

8,220

7,090

6,690

6,650

6,610

6,190

5,650

July

2,240

2,240

2,030

1,920

1,800

1,690

1,590

1,500

1,400

1,330

Day

11

12

13

14

15

16

17

18

19

20

May

1,950

1,870

2,360

2,920

2,880

3,110

3,760

5,420

6,630

8,560

June

5,310

4,790

4,420

4,050

3,660

3,580

3,300

2,920

3,040

2,870

July

1,440

1,450

1,280

1,170

1,100

1,040

990

990

1,130

1,180

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .......... ....................................... _ .......

Runoff, in inches ............................................................................................................................

May

8,790

9,290

8,750

7,880

8,170

8,960

9,340

10,200

11,000

10,400

9,350

5,130

5.64

June

2,990

3,200

2,930

2,850

2,760

2,630

2,450

2,330

2,250

2,170

4,565

4.85

July

1,110

980

882

855

802

725

685

725

882

882

759

1,252

1.37

Gage height, in feet, and dipcharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8

N

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.55 

4.57 

4.73 

4.79 

4.89 

5.15

3,480 

3,510 

3,780 

3,880 

4,050 

4,510

May 23

7.27 

7.24 

7.16 

7.03 

6.91 

6.86

Mi

7.90 

8.06 

8.08 

8.09 

8.06 

8.02

Ju

7.12 

7.07 

6.94 

6.75 

6.62 

6.57

9,130 

9,060 

8,860 

8,550 

8,260 

8,150

iy29

10,700 

11,100 

11,200 

11,200 

11,100 

11,000

ne4

8,770 

8,650 

8,340 

7,900 

7,600 

7,480

June 10

5.92 

5.84 

5.72 

5.59 

5.55 

5.62

Ju

4.72 

4.70 

4.62 

4.55 

4.48 

4.52

6,030 

5,860 

5,620 

5,360 

5,280 

5,420

ne!6

3,760 

3,730 

3,590 

3,480 

3,370 

3,430

Gage 

height Discharge

May 18

5.41 

5.58 

5.67 

5.72 

5.82 

5.88

M:

6.87 

6.83 

6.75 

6.67 

6.59 

6.68

Mi

7.99 

7.91 

7.81 

7.65 

7.55 

7.47

Ju

6.54 

6.51 

6.43 

6.31 

6.21 

6.24

5,000 

5,340 

5,520 

5,620 

5,820 

5,950

iy24

8,170 

8,080 

7,900 

7,710 

7,530 

7,730

»y30

10,900 

10,700 

10,500 

10,100 

9,820 

9,620

ne5

7,410 

7,340 

7,160 

6,880 

6,660 

6,730

June 11

5.67 

5.66 

5.54 

5.52 

5.47 

5.43

5,520 

5,500 

5,260 

5,220 

5,120 

5,040

June 17

4.57 

4.52 

4.45 

4.37 

4.32 

4.31

3,510 

3,430 

3,320 

3,190 

3,110 

3,100

Gage 

height Discharge

May 19

5.98 

6.13 

6.18 

6.25 

6.38 

6.57

6,160 

6,490 

6,600 

6,750 

7,040 

7,480

May 25

6.85 

6.94 

6.92 

6.86 

6.82 

6.96

Mi

7.58 

7.52 

7.38 

7.26 

7.12 

7.13

8,120 

8,340 

8,290 

8,150 

8,060 

8,380

iy3l

9,900 

9,750 

9,400 

9,100 

8,770 

8,790

June 6

6.32 

6.33 

6.25 

6.12 

6.10 

6.19

Ju

5.47 

5.43 

5.32 

5.19 

5.11 

5.12

6,910 

6,930 

6,750 

6,460 

6,420 

6,620

ne!2

5,120 

5,040 

4,830 

4,580 

4,440 

4,460

June 18

4.28 

4.23 

4.19 

4.14 

4.10 

4.13

3,050 

2,980 

2,920 

2,840 

2,780 

2,820

Gage 

height Discharge

May 20

6.81 

7.00 

7.17 

7.20 

7.16 

7.12

8,030 

8,480 

8,890 

8,960 

8,860 

8,770

May 26

7.15 

7.29 

7.27 

7.19 

7.15 

7.31

Ju

7.18 

7.14 

6.98 

6.85 

6.78 

6.88

J«

6.33 

6.26 

6.23 

6.13 

6.03 

6.24

8,840 

9,180 

9,130 

8,940 

8,840 

9,220

ne 1

8,310 

8,820 

8,430 

8,120 

7,960 

8,190

ne7

6,930 

6,770 

6,710 

6,400 

6,270 

6,730

June 13

5.14 

5.12 

5.11 

5.07 

5.06 

5.07

4,490 

4,460 

4,440 

4,370 

4,350 

4,370

June 19

4.25 

4.31 

4.32 

4.30 

4.26 

4.23

3,000 

3,100 

3,110 

3,080 

3,020 

2,980

Gage 

height

Mi

7.16 

7.16 

7.17 

7.11 

7.06 

7.13

Discharge

»y21

8,860 

8,860 

8,890 

8,740 

8,620 

8,790

May 27

7.42 

7.44 

7.37 

7.29 

7.23 

7.48

Ju

7.03 

7.04 

6.94 

6.78 

6.76 

6.89

Ju

6.37 

6.31 

6.17 

6.02 

6.07 

6.13

9,500 

9,550 

9,380 

9,180 

9,030 

9,650

ne2

8,550 

8,580 

8,340 

7,960 

7,920 

8,220

ne8

7,020 

6,880 

6,570 

6,240 

6,350 

6,490

June 14

5.07 

5.01 

4.90 

4.77 

4.68 

4.69

4,370 

4,260 

4,070 

3,850 

3,700 

3,710

June 20

4.22 

4.21 

4.16 

4.10 

4.09 

4.11

2,960 

2,940 

2,870 

2,780 

2,770 

2,800

Gage 

height Discharge

May 22

7.28

7.40 

7.44 

7.40 

7.30 

7.26

9,150 

9,450 

9,550 

9,450 

9,200 

9,100

May 28

7.68 

7.82 

7.77 

7.66 

7.62 

7.71

10,200 

10,500 

10,400 

10,100 

10,000 

10,200

June 3

7.05 

7.12 

7.11 

7.06 

7.03 

7.06

Ju

6.17 

6.10 

5.98 

5.85 

5.84 

5.92

Ju

4.72 

4.71 

4.67 

4.61 

4.57 

4.67

Ju

4.13 

4.15 

4.19 

4.27 

4.39 

4.48

8,600 

8,770 

8,740 

8,620 

8,550 

8,620

ne9

6,570 

6,420 

6,160 

5,880 

5,860 

6,030

ne 15

3,760 

3,750 

3,680 

3,580 

3,510 

3,680

ne21

2,820 

2,860 

2,920 

3,040 

3,220 

3,370

Supplemental record.- May 20, 10 p.m., 7.10 ft., 8,720 sec.-ft.; May 24, 6 a.m., 

6.82 rt.,~6,O60 sec.-ft.; May 27, 10 p.m., 7.31 ft., 9,220 sec.-ft.; May 29, 11 a.m., 

8.12 ft., 11,300 sec.-ft.; May 30, 2 a.m., 8.07 ft., 11,200 sec.-ft.; June 7, 2 p.m., 

6.23 ft., 6,710 sec.-ft.; June 9, 6 p.m., 5.82 ft., 5,820 sec.-ft.
FEND OREILLE RIVER BASIN 105

East Pork- Bltterroot River at Conner, Mont.

Location.- Lat. 45°56', long. 114°08', In SE£ sec. 7, T. 2 N., R. 20 W., 100 feet below 

highway bridge at Conner and half a mile upstream from confluence with West Pork.

Drainage area.- 404 square miles.

Gage-height record..- Graph drawn on basis of twice-daily wire-weight gage readings, 

observation of crest gage height, and shape of recorder graph of Bltterroot River 

near Darby for period May 17 to June 21. Average of twice-daily readings used 

May 1-17, June 22 to July 31. No gage reading July 4.

Discharge record.- Stage-discharge relation defined by current-meter measurements and 

shape of previous curve below 2,650 second-feet and extended to peak stage. Gage 

heights used to hundredths.

Maxima.- May-June 1948: Discharge, 3,760 second-feet 10 a.m. May. 29 (gage height, 5.70

1937 to April 1948: Discharge observed, 3,630 second-feet May 9, 1947 (gage 

height, 5.78 feet). 

Remarks.- Plow during flood period not affected by diversions.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

475

449

415

424

386

420

424

492

732

721

Jane

2,600

2,620

2,640

2,540

2,300

2,120

2,120

1,980

1,700

1,640

July

595

629

619

570

521

485

468

459

430

425

Day

11

12

13

14

15

16

17

18

19

20

May

738

755

755

778

796

846

1,020

1,570

2,170

3,090

June

1,580

1,530

1,370

1,290

1,110

1,050

981

842

883

826

July

425

421

380

360

349

341

333

326

341

349

Day

21

22

28

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...... ......... . .... ...... .. .........

Runoff, in inches............................................................................................................................

May

3,280

3,520

3,340

3,010

3,100

3,340

3,440

3,550

3,570

2,950

2,580

1,774

5.05

June

886

980

961

937

906

846

784

703

624

581

1,398

3.86

July

337

315

290

282

265

262

268

282

290

290

279

387

1.10

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

ts

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage

height Discharge

May 17

3.19 

3.23 

3.22 

3.23 

3.32 

3.50

Mi

5.50 

5.52 

5.46 

5.27 

5.17 

5.18

M

5.56 

5.66 

5.69 

5.56 

5.37 

5.27

Ju

4.69 

4.69 

4.61 

4.52 

4.44 

4.44

983 

1,010 

1,000 

1,010 

1,080 

1,220

y23

3,500 

3,530 

3,450 

3,200 

3,070 

3,080

»y29

3,580 

3,710 

3,750 

3,610 

3,400 

3,290

ne4

2,650 

2,650 

2,570 

2,480 

2,400 

2,400

Jane 10

3.70 

3.70 

3.62 

3.53 

3.50 

3.53

1,720 

1,720 

1,660 

1,580 

1,560 

1,580

Jane 16

2.87 

2.84 

2.81 

2.78 

2.78 

2.80

1,090 

1,070 

1,050 

1,030 

1,030 

1,040

Gage 

height Discharge

May 18

3.73 

3.82 

3.89 

3.94 

4.01 

4.10

1,430 

1,520 

1,590 

1,640 

1,710 

1,800

May 24

5.19 

5.18 

5.14 

5.07 

5.04 

5.06

M

5.16 

5.03 

4.93 

4.84 

4.78 

4.77

Ju

4.44 

4.43 

4.36 

4.25 

4.19 

4.24

Ju

3.58 

3.61 

3.-S4 

3.48 

3.46 

3.46

3,100 

3,080 

3,030 

2,940 

2,900 

2,930

iy30

3,170 

3,020 

2,910 

2,810 

2,750 

2,740

ne5

2,400 

2,390 

2,320 

2,210 

2,150 

2,200

me 11

1,620 

1,650 

1,590 

1,540 

1,530 

1,530

Jane 17

2.84 

2.78 

2.71 

2.63 

2.57 

2.55

1,070 

1,030 

986 

937 

900 

888

Gage 

height Discharge

May 19

4.22 

4.27 

4.34 

4.47 

4.74 

4.90

1,930 

1,990 

2,060 

2,210 

2,540 

2,730

May 25

5.14 

5.28 

5.27 

5.19 

5.14 

5.22

3,030 

3,210 

3,200 

3,100 

3,030 

3,140

May 31

4.79 

4.80 

4.64 

4.44 

4.41 

4.48

2,760 

2,770 

2,600 

2,400 

2,370 

2,440

Jane 6

4.27 

4.26 

4.18 

4.04 

4.00 

4.12

2,230 

2,220 

2,140 

2,020 

1,980 

2,090

Jane 12

3.58 

3.60 

3.51 

3.40 

3.33 

3.31

1,620 

1,640 

1,570 

1,480 

1,420 

1,410

June 18

2.53 

2.50 

2.47 

2.44 

2.42 

2.40

876 

858 

841 

823 

812 

800

Gage 

height Discharge

May 20

5.05 

5.16 

5.21 

5.26 

5.29 

5.35

2,920 

3,060 

3,120 

3,190 

3,230 

3,300

May 26

5.37 

5.52 

5.49 

5.34 

5.28 

5.33

Ju

4.72 

4.80 

4.72 

4.60 

4.49 

4.57

Ju

4.28 

4.22 

4.19 

4.12 

4.01 

4.14

3,330 

3,530 

3,490 

3,290 

3,210 

3,280

lie 1

2,680 

2,770 

2,680 

2,560 

2,450 

2,530

ne7

2,240 

2,180 

2,150 

2,090 

1,990 

2,110

June 13

3.29 

3.25 

3.24 

3.24 

3.23 

3.23

i,390 

1,360 

1,360 

1,360 

1,350 

1,350

June 19

2.48 

2.61 

2.63 

2.57 

2.51 

2.50

846 

924 

937 

900 

864 

858

,2$ | Discharge

May 21

5.39 

5.40 

5.34 

5.27 

5.27 

5.33

M:

5.44 

5.52 

5.50 

5.44 

5.39 

5.50

3,360 

3,370 

3,290 

3,200 

3,200 

3,280

iy27

3,420 

3,530 

3,500 

3,420 

3,360 

3,500

June 2

4.76 

4.84 

4.73 

4.56 

4.50 

4.58

Ju

4.24 

4.17 

3.98 

3.81 

3.80 

3.84

Ju

3.19 

3.16 

3.14 

3.14 

3.11 

3.04

2,730 

2,810 

2,690 

2,520 

2,460 

2,540

ne8

2,200 

2,130 

1,960 

1,810 

1,800 

1,840

ne 14

1,320 

1,300 

1,280 

1,280 

1,260 

1,210

Jane 20

2.49 

2.48 

2.46 

2.41 

2.38 

2.39

852 

846 

835 

806 

789 

794

Gage 

height

Mi

5.42 

5.55 

5.65 

5.57 

5.48 

5.47

Discharge

iy22

3,400 

3,560 

3,700 

3,590 

3,470 

3,460

May 28

5.60 

5.66 

5.62 

5.49 

5.38 

5.43

Ju

4.66 

4.71 

4.75 

4.72 

4.63 

4.65

Ju

3.82 

3.76 

3.65 

3.56 

3.55 

3.62

3,630 

3,710 

3,660 

3,490 

3,340 

3,410

ne3

2,620 

2,670 

2,720 

2,680 

2,590 

2,610

ne9

1,820 

1,770 

1,680 

1,610 

1,600 

1,660

June 15

2.97 

2.93 

2.88 

2.83 

2.80 

2.84

1,160 

1,140 

1,100 

1,070 

1,040 

1,070

June 21

2.39 

2.40 

2.50 

2.63 

2.75 

2.80

794 

800 

858 

937 

1,010 

1,040
106 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

 

Rook Creek near Darby, Mont.

Location.- Lat. 46°04', long. 114°13', In SW£ sec. 28, T. 4 N., R. 21 W., 500 feet upstream from diversion dam, 1-J- miles downstream from Como Lake, and 4 miles northwest

of Darby.

Drainage area.- 55.5 square miles. 

Gage-height record.- Gage read once dally. Doubtful gage-height record July 23-25, 27-31.

No gage-height record May 1-15. 

Discharge record.- Stage-discharge relation defined by current-meter measurements. Dlscharge for May 1-15 computed on basis of records of gate changes. Discharge for days

of doubtful gage-height record computed on basis of records for Rock Creek Canal. 

Maxima.- May-June 1948: Discharge observed, 1,500 second-feet 7 a.m. May 27 (gage height,

5.78 feet).

1946: Discharge observed, 408 second-feet May 10, July 4-10, 1946 (gage height, 4.10

feet). 

Remarks.- Plow regulated by Como Lake. No record during high-water period In 1947.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

66

66

66

66

66

66

130

230

230

230

June

1,100

1,190

1,270

1,290

1,220

1,220

1,220

1,080

1,080

1,080

July

320

320

328

351

351

343

336

328

320

320

Day

11

12

13

14

15

16

17

18

19

20

May

230

230

230

230

230

360

372

482

812

812

June

824

835

835

824

789

778

449

205

198

198

July

313

313

320

320

320

320

320

306

306

306

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... . ..... ......................................................

Runoff, in inches ................................................... ...................................................................

May

900

851

862

874

939

1,080

1,500

1,430

1,430

1,430

1,310

575

11.99

June

192

192

284

399

457

457

432

359

359

359

-

706

14.17

July

291

284

284

284

284

264

250

250

250

250

250

303

6.30

Rock Creek Canal near Darby, Mont.

Location.- Lat. 46°04', long. 114°13 T , In SWj sec. 28, T. 4 N., R. 21 W. , a quarter of 

a mile downstream from diversion dam, l£ miles downstream from Como Lake, and 4 miles 

northwest of Darby.

Gage-height record.- Staff gage read once dally except periods May 1-29, June 1.

Discharge records . - Stage-discharge relation defined by current-meter measurements. Dlscharge for June 1 Interpolated.

Maxima.- May-June 1948: Discharge observed, 286 second-feet July 1-17 (gage height, 4.64

1946: Discharge observed, 347 second-feet Apr. 25 to May 8, 1946; gage height, 5.06 

feet July 22-29, Aug. 2-22, 1946. 

Remarks . - Canal diverts from Rock Creek for Irrigation. No records for 1947.

Mean discharge, in second-feet. 19&8

Day

1

2

K

6

g

10

May June

251

251

262

215

158

136

136

134

134

0

July

286

286

286

286

286

286

286

286

286

286

Day

11

12

13

15

16

17

18

IQ

20

May June

0

0

0

0

93

124

124

124

124

118

July

286

286

286

286

286

286

286

283

283

280

Day

21

22

23

24

25

W

27

28

fW

30

31

Runoff, in inches .................................................................................. 

May

254

June

116

106

103

105

105

105

169

167

167

123

-

July

283

280

280

280

280

246

277

-
PEHD OREILLE RIVER BASIN 107

Blodgett Creek near Corvallls, Mont.

Location.,- Lat. 46°16', long. 114°13', In NW$NW£ see. 21, T. 6 N., R. 21 W., 4£ miles

upstream from mouth and 7 miles southwest of Corvallls. 

Drainage area.- 26.8 square miles. 

gage-height record.- Water-stage recorder graph. 

Discharge record.-~Stage-dlscharge relation defined by current-meter measurements below

510 second-feet and extended to peak stage. Of age heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 812 second-feet 3:30 a.m. May 28 (gage height, 6.33

1947 to April 1948: Discharge, 750 second-feet 3:30 a.m. May 9, 1947 (gage 

height, 6.10 feet). 

Remarks.- Flow slightly affected by storage for Irrigation in High Lake and Blodgett

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

127

111

106

113

103

111

176

186

156

135

June

465

521

663

515

439

460

511

523

509

456

July

170

174

137

120

117

104

93

82

74

71

Day

11

12

18

14

IS

16

17

18

19

20

May

124

120

150

166

150

172

255

405

493

616

June

461

366

380

338

298

308

241

203

222

243

July

70

63

59

51

48

44

41

43

50

60

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ............................................. ........ ...............

Runoff, in inches ............................................................................................................................

May

541

616

496

423

515

593

646

689

688

523

463

328

14.07

June

262

248

200

188

178

168

156

170

180

178

335

13.95

July

57

46

41

39

33

30

28

34

57

53

46

68.9

2.96

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.98 

4.04 

4.04 

4.05 

4.23 

4.61

Mi

5.42 

5.27 

5.09 

4.90 

4.82 

4.88

Mi

5.89 

6.03 

6.09 

5.86 

5.66 

5.64

Ju

5.45 

5.30 

5.14 

5.01 

4.95 

5.02

229 

242 

242 

244 

285 

374

y23

574 

536 

492 

444 

425 

439

iy29

695 

732 

747 

688 

636 

630

ne4

582 

544 

504 

472 

456 

474

June 10

5.30 

5.06 

4.78 

4.58 

4.70 

5.14

Ju

4.56 

4.47 

4.33 

4.19 

4.14 

4.17

544 

484 

415 

367 

396 

504

ne 16

362 

341 

308 

276 

264 

271

Gage 

height Discharge

May 18

4.84 

4.85 

4.74 

4.64 

4.64 

4.80

Ms

4.94 

4.87 

4.72 

4.62 

4.73 

5.12

Mi

5.57 

5.38 

5.14 

4.94 

4.91 

5.09

Ju

5.06 

4.98 

4.84 

4.70 

4.69 

4.97

Ju

5.35 

5.10 

4.84 

4.69 

4.76 

4.90

430 

432 

40S 

382 

382 

420

iy24

454 

437 

401 

377 

403 

499

iy30

612 

564 

504 

454 

446 

492

ne 5

484 

464 

430 

396 

394 

462

nell

556 

494 

430 

394 

410 

444

June 17

4.17 

4.11 

4.01 

3.93 

3.92 

3.98

271 

257 

235 

218 

215 

229

Gage 

height Discharge

May 19

4.92 

4.98 

5.03 

5.11 

5.26 

5.61

449 

464 

476 

496 

534 

623

May 25

5.36 

5.27 

5.08 

4.94 

5.10 

5.60

559

536 

489 

454 

494 

620

May 31

5.23 

5.12 

4.94 

4.77 

4.78 

4.99

Ju

5.18 

5.06 

4.83 

4.67 

4.87 

5.30

526 

499 

454 

413 

415 

466

ne6

514 

484 

427 

389 

437 

544

June 12

4.87 

4.68 

4.48 

4.36 

4.37 

4.51

437 

391 

343 

315 

317 

350

June 18

3.96 

3.89 

3.83 

3.78 

3.77 

3.88

224 

209 

196 

186 

184 

207

Gage 

height Discharge

May 20

5.93 

5.90 

5.65 

5.36 

5.20 

5.26

706 

698 

633 

559 

519 

534

May 26

5.75 

5.59 

5.37 

5.19 

5.33 

5.84

Ju

5.18 

5.10 

4.91 

4.74 

4.86 

5.27

659 

617 

562 

516 

552 

682

ne 1

514 

494 

446 

406 

434 

536

June 7

5.42 

5.23 

4.98 

4.85 

5.12 

5.55

574 

526 

464 

432 

499 

607

June 13

4.57 

4.57 

4.71 

4.72 

4.64 

4.68

365 

365 

398 

401 

382 

391

June 19

3.95 

3.96 

3.93 

3.94 

3.98 

4.02

222

224 

218 

220 

229 

237

Gage 

height

Mi

5.33 

5.28 

5.18 

5.10 

5.34 

5.74

Discharge

iy21

552 

539 

514 

494 

554 

656

May 27

5.97 

5.83 

5.57 

5.38 

5.53 

6.03

Ju

5.43 

5.32 

5.10 

4.92 

5.08 

5.55

Ju

5.56 

5.27 

4.99 

4.84 

5.11 

5.52

Ju

4.72 

4.56 

4.38 

4.25 

4.28 

4.43

716 

680 

612 

564 

602 

732

ne2

576 

549 

494 

449 

489 

607

ne8

610 

, 536 

466 

430 

496 

599

ne 14

401 

362 

319 

290 

296 

331

June 20

4.12 

4.09 

4.03 

3.97 

4.01 

4.08

260 

253 

240 

226 

235 

251

Gage 

height Discharge

May 22

5.85 

5.77 

5.58 

5.37 

5.33 

5.41

685 

664 

615 

562 

552 

572

May 28

6.33 

6.10 

5.85 

5.62 

5.48 

5.64

Ju

6.05 

6.16 

5.85 

5.57 

5.42 

5.47

Ju

5.50 

5.25 

4.97 

4.80 

4.99 

5.34

812 

750 

685 

625 

589 

630

ne3

737 

766 

685 

612 

574 

586

ne9

594 

532 

462 

420 

466 

554

June 15

4.46 

4.44 

4.20 

4.12 

4.12 

4.36

338 

334 

278 

260 

260 

315

June 21

4.07 

4.07 

4.06 

4.12 

4.23 

4.36

248 

248 

246 

260 

285 

315

824933 O - 49 - 9
108 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Blodgett Creek near Corvallis, Mont.--Continued 

Supplemental record;

May 19, 7 a.m., 5.02 ft., 474 sec.-ft.; 7 p.m., 5.30 ft., 544 sec.-ft. 

22, 2 a.m., 5.84 ft., 682 sec.-ft.

24. 6 p.m., 4.63 ft., 379 sec.-ft.

25. 3 a.m., 5.35 ft., 556 sec.-ft.; 6 p.m., 4.96 ft., 459 sec.-ft.

26. 2 a.m., 5.74 ft., 656 sec.-ft.; 6 p.m., 5.20 ft., 519 sec.-ft.

27. 3 a.m., 5.99 ft., 721 sec.-ft.; 6 p.m., 5.38 ft., 564 sec.-ft.

28. 3;30 a.m., 6.33 ft., 812 sec.-ft.

30. 6 p.m., 4.89 ft., 442 sec.-ft.

31. 6 p.m., 4.73 ft., 403 sec.-ft. 

June 1, 2 a.m., 5.12 ft., 499 sec.-ft.; 6 p.m., 4.74 ft., 406 sec.-ft.

2. 2 a.m., 5.40 ft., 569 sec.-ft.; 6 p.m., 4.94 ft., 454 sec.-ft.

3. 6 a.m., 6.20 ft., 777 sec.-ft.; 6 p.m., 5.46 ft., 584 sec.-ft.

6. 2 a.m., 5.12 ft., 499 sec.-ft.

7. 3 a.m., 5.44 ft., 579 sec.-ft.; 3 p.m., 4.85 ft., 432 sec.-ft.; 

6 p.m., 4.93 ft., 452 sec.-ft.

8. 2 a.m., 5.61 ft., 623 sec.-ft.; 2 p.m., 4.88 ft., 439 sec.-ft.; 

6 p.m., 4.92 ft., 449 sec.-ft.

9. 2 a.m., 5.58 ft., 615 sec.-ft.; 6 p.m., 4.84 ft., 430 sec.-ft.

10. 5 p.m., 4.58 ft., 367 sec.-ft.

11. 2 a.m., 5.35 ft., 556 sec.-ft.; 5 p.m., 4.67 ft., 389 sec.-ft.

12. 6 p.m., 4.33 ft., 308 sec.-ft.

13. 6 a.m., 4.54 ft., 358 sec.-ft.

14. 2 a.m., 4.73 ft., 403 sec.-ft.; 6 p.m., 4.23 ft., 285 sec.-ft.

15. 2 a.m., 4.47 ft., 341 sec.-ft.; 10 p.m., 419 ft., 276 sec.-ft.

16. 2 a.m., 4.50 ft., 348 sec.-ft.; 7 p.m., 4.13 ft., 262 sec.-ft.;

10 p.m., 4.17 ft., 271 sec.-ft. 

20, 6 a.m., 4.13 ft., 262 sec.-ft.; 6 p.m., 3.97 ft., 226 sec.-ft.
PEMD OREILLE RIVER BASIN 109

Bear Creek near Victor, Mont.

Location.- Lat. 46°23', long. 114°13', In NE£ sec. 9, T. 7 N., R. 21 W., 5 miles southwest of Victor.

Drainage area.- 26.6 square miles.

Gage-height record.- Water-stage recorder graph except for period May 21-24. 

Discharge record.- Stage-discharge relation defined by current meter measurements below

530 second-feet and extended to peak stage. Shifting-control method used 11 p.m.

May 26 to 10 p.m. May 28. Discharge for period of no gage-height record computed

from graph drawn on basis of records for Blodgett Creek near Corvallls. Gage heights

used to hundredths. 

Maxima.- May-June 194:8: Discharge, *1,100 second-feet 12 p.m. May 27 (gage height,

3.80 feet).

1938 to April 1948: Discharge, 865 second-feet Apr. 18, 1938, from rating curve

extended above 400 second-feet; gage height, 3.70 feet May 24, 1942. 

Remarks.- No regulation or diversion.

Mean discharge, in second-feet, 194.8

Day

1

2

3

4

5

6

7

8

9

10

May

119

100

92

92

84

95

139

143

121

105

June

513

579

701

545

479

495

570

581

552

501

Monthly mean discharge, S

July

158

121

92

81

77

69

61

55

52

50

Day

11

12

13

14

15

16

17

18

19

20

May

101

103

130

138

125

149

263

400

527

561

June

476

410

420

348

296

318

314

227

208

197

July

48

44

41

39

37

36

353*4

35

42

Day

21

22

23

24

25

26

m

28

29

30

31

becond-feet ............. _ .... . _........_........ ..... .. . . ........

Runoff, in inches ............................................................................................................................

May

594

658

479

453

585

660

761

812

759

525

491

334

14.41

June

279

261

196

174

158

163

150

152

148

142

352

14.73

July

42

35

32

31

29

28

27

34

61

53

41

52.3

2.26

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

t~t

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.34 

2.36 

2.36 

2.49 

2.80 

2.94

Mi

3.3 

3.1 

3.0 

2.9 

3.0 

3.0

M

3.26 

3.36 

3.22 

3.03 

3.03 

2.98

Ju

2.88 

2.79 

2.71 

2.69 

2.73 

2.75

214 

220 

220 

257 

362 

416

y23

576 

482 

440 

400 

440 

440

iy29

816 

879 

792 

678 

678 

649

ne4

595 

550 

514 

505 

523 

532

June 10

2.76 

2.60 

2.48 

2.51 

2.80 

2.85

Ju

2.31 

2.26 

2.15 

2.07 

2.13 

2.35

537 

466 

418 

430 

555 

580

ne!6

356 

338 

302 

278 

296 

370

^SSt\ Discharge

May 18

2.94 

2.88 

2.80 

2.85 

2.95 

3.00

416 

392 

362 

381 

420 

440

May 24

3.0 

2.9 

2.8 

3.0 

3.25 

3.36

M

2.84 

2.72 

2.62 

2.58 

2.74 

2.79

Ju

2.70 

2.61 

2.54 

2.50 

2.68 

2.72

440 

400 

362 

440 

552 

608

iy30

575 

518 

475 

458 

527 

550

ne 5

509 

470 

442 

426 

500 

518

June 11

2.71 

2.55 

2.46 

2.48 

2.70 

2.75

Ju

2.41 

2.27 

2.13 

2.01 

2.01 

2.04

514 

446 

411 

418 

509 

532

nel?

392 

342 

296 

261 

261 

270

Gage 

height Discharge

May 19

3.01 

3.09 

3.16 

3.23 

3.38 

3.52

444 

478 

509 

542 

619 

702

May 25

3.29 

/3.20 

3.12 

3.18 

3.53 

3.59

571 

527 

491 

518 

708 

744

May 31

2.73 

2.65 

2.55 

2.54

2.66 

2.80

Ju

2.63 

2.53 

2.45 

2.56 

2.91 

L2.95

523 

488 

446 

442 

492 

555

ne6

475 

438 

407 

450 

610 

632

June 12

2.61 

2.46 

2.32 

2.29 

2.43 

2.45

470 

411 

359 

349 

399 

407

June 18

1.98 

1.91 

1.83 

1.79 

1.84 

1.90

252 

233 

211 

200 

214 

230

h«^t | Discharge

May 20

3.49 

3.35 

3. ft 

3.15 

3.19 

3.24

684 

603 

542 

504 

522 

547

May 26

3.49 

3.34 

3.23 

3.28 

3.64 

3.51

684 

598 

542 

566 

776 

846

June 1

2.78 

2.66 

2.55 

2.52 

2.80 

3.00

546 

492 

446 

434 

555 

660

June?

2.81 

2.68 

2.57 

2.75 

3.09 

3.04

560 

500 

454 

532 

714 

684

June 13

2.40 

2.54 

2.52 

2.45 

2.50 

2.52

Ju

1.89 

1.85 

1.81 

1.77 

1.75 

1.76

388 

442 

434 

407 

426 

434

ne!9

227 

216 

206 

196 

190 

193

Gage 

height

Mi

3.24 

3.20 

3.16 

3.24 

3.6 

3.7

Discharge

iy21

547 

527 

509 

547 

750 

815

May 27

3.34 

3.20 

3.06 

3.20 

3.69 

3.80

744 

660 

585 

660 

964 

1,100

June 2

2.89 

2.76 

2.60 

2.64 

3.00 

3.23

Ju

2.84 

2.71 

2.60 

2.80 

3.08 

2.99

600 

537 

466 

483 

660 

798

ne8

575 

514 

466 

555 

708 

654

June 14

2.46 

2.33 

2.22 

2.16 

2.27 

2.33

41T 

363 

325 

306 

342 

363

June 20

1.75 

1.73 

1.71 

1.75 

1.86 

1.93

190 

186 

180 

190 

219 

238

Gage 

height

Mi

3.6 

3.5 

3.4 

3.2 

3.4 

3.4

Discharge

iy22

750 

690 

630 

527 

630 

630

May 28

3.64 

3.44 

3.24 

3.12 

3.13 

3.19

996 

866 

744 

672 

678 

774

June 3

3.27 

3.19 

3.01 

2.91 

2.92 

2.96

Ju

2.80 

2.70 

2.57 

2.72 

2.96 

2.92

Ju

2.25 

2.15 

2.05 

1.99 

2.06 

2.17

822 

774 

666 

610 

616 

638

ne9

555 

509 

454 

518 

638 

616

ne!5

335 

302 

272 

255 

275 

309

June 21

1.99 

2.01 

2.07 

2.19 

2.35 

2.31

155 

261 

278 

315 

370 

356
110 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

Burnt Pork Creek near Stevensvllle, Mont.

Location.- Lat. 46°28', long. 113°57', in SW£ sec. 11, T. 8 N., R. 19 W., at highway

bridge, 8 miles southeast of Stevensvllle. 

Drainage area.- 74 square miles.

Gage-height record.- Staff gage read once dally except Sundays and holidays. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

420 second-feet. Gage heights used to hundredths. Discharge Interpolated on days

of no gage-height record. 

Maxima.- May-June 1948: Discharge observed, 565 second-feet noon May 28, 29 (gage

height, 2.54 feet).

1920-24, 1938 to April 1948: Discharge observed, 641 second-feet May 28, 1938

(gage height, 2.92 feet). 

Remarks.- Several diversions above station for Irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

119

110

101

101

94

101

141

188

170

160

June

449

449

458

467

440

427

414

414

405

380

July

150

146

136

120

100

94

94

91

91

87

Day

11

12

13

14

15

16

17

18

19

20

May

160

160

188

200

188

220

253

346

371

502

June

363

354

330

305

282

260

260

226

219

225

July

85

84

84

84

78

78

78

71

74

71

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..........

Runoff, in inches .

May

458

502

450

414

405

440

458

565

565

547

500

296

4.61

June

233

282

260

246

239

226

200

182

177

155

311

4.69

July

66

64

60

60

55

49

46

49

60

53

46

80.8

1.26

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour height | ^charge

May 17 

1.80 253

May 18 

2.04 346

May 19 

2.10 371

May 20 

2.40 502

May 21 

2.30 458

May 22 

2.40 502

May 24 

2.20 414

May 25 

2.18 405

Hour Gage 

height

May 

2.26

May 

2.30

May 

2.54

May 

2.54

May

2.5

Discharge

26 

440

27

*458

28 

565

29 

565

30

547

June 1

2.28 44 y

June 2

2.28 449

June 3 

2.30 458

Hour

lOa

height Discharge

June 4 

2.32 467

June 5 

2.26 440

June 6 

2.23 427

June 7 

2.20 414

June 8 

2.20 414

June 9 

2.18 405

June 10 

2.12 380

June 11 

2.08 363

Hour height Discharge

June 12 

2.06 354

June 14 

1.94 305

June 15 

1.88 282

June 16 

1.82 260

June 17 

1.82 260

June 18 

1.72 226

June 19 

1.70 219

June 21 

1.74 233

Note.- Time for all 

July IS (4 p.m.)

readings Is noon except May 30. (unknown), June 6 (10 a.m.), and
PEMD OREILLE RIVER BASIN 111

Plathead River at Flathead, British Columbia 

(International gaging station)

Location.- Lat. 49°00', long. 114 0 29', at highway bridge, 0.2 mile north of international boundary, 0.2 mile northwest of Plathead, British Columbia, and 7 miles 

northwest of Trail Creek, Mont.

Drainage area.- 450 square miles.

Qage-height record.- Staff-gage read twice daily except for period May 17 to June 5, 

when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

8,000 second-feet and extended to peak stage. Discharge for period of no gageheight record computed on basis of records for station near Columbia Palls, Mont.

Maxima.- May-June 1948: Discharge, 14,600 second-feet May 23, 1948 (gage height, 9.1 

feet, from floodmark).

1929 to April 1948: Discharge observed, 10,600 second-feet June 17, 1933 (gage 

height, 7.10 feet, revised).

Remarks.- No regulation or diversion above station. This station is one of the international gaging stations maintained by Canada under agreement with the United 

States.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,670

2,070

1,780

1,810

1,730

1,690

1,780

1,780

1,790

1,810

June

6,400

7,000

6,900

6,900

6,100

4,950

5,160

5,130

4,950

4,490

July

1,500

1,340

1,250

1,160

1,100

1,060

1,030

1,020

967

911

Day

11

12

13

14

15

16

17

18

19

20

May

1,690

1,730

1,820

1,830

1,840

1,840

2,320

3,900

6,560

9,090

June

3,660

3,390

3,280

3,060

2,880

2,740

3,140

3,320

3,140

2,610

July

883

855

827

778

744

720

708

690

696

720

Day

21

22

28

24

26

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... .................. .. ............................. ....................

Runoff, in inches ............................................................................................................................

May

9,090

11,000

14,600

14,500

11,500

11,300

11,700

12,000

11,300

8,500

6,200

5,590

14.32

June

2,450

2,230

2,230

2,340

2,290

2,180

2,010

1,800

1,660

1,600

-

3,670

9.11

July

957

' 785

738

690

648

630

636

897

1,280

1,560

1,580

947

2.42

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

5:45p

8

8

B

8

8

7:20

Gage 

height Discharge

June 6

4.95 4,950

June 7

5.10

5.00

5,260

5,050

June 8

5.10

4.98

5,260

5,010

June 9

4.90

4.80

4,850

4,650

Hour

8

6:55

8

8

8

7:25

8

6:30

 

Gage 

height Discharge

June 10

4.80

4.64

4,650

4,330

June 11

4.40

4.20

3,850

3..470

June 12

4.18

4.15

3,440

3,380

June 13

4.10

4.10

3,280

3,280

Hour

8

8

8a

8:30f

8

8

8

8

Gage 

height Discharge

June 14

3.95

5.00

3,010

5,050

June 15

3.90

3.85

2,920

2,830

June 16

3.80

3.80

2,740

2,740

June 17

3.95

4.10

3,010

3,280

Hour

8

6:45

8a

8:2Cp

8

8

8

8

Gage 

height

. June

4.15

4.10

June

4.05

4.00

June

3.80

3.65

June

3.63

3.60

Discharge

18

3,370

3,280

19

3,190

3,100

20

2,740

2,500

21

2,470

2,420
112 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Plathead River near Columbia Palis, Mont.

Location.- Lat. 48°29', long. 114°05', in NW& see. 7, T. 31 N., R. 19 W., three-quarters 

of a mile upstream from Middle Pork and 10 miles northeast of Columbia Palls. Datum 

of gage is 3,109.70 feet above mean sea level, datum of 1929 (levels by Bureau of 

Reclamation).

Drainage area.- 1,620 square miles.

gage-height "record.- Water-atage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

16,000 second-feet and extended to peak stage. Oage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 26,400 second-feet 4 a.m. May 24 (gage height, 11.84 FliF).

1910-17, 1929 to April 1948: Discharge, 29,500 second-feet June 20, 1916 (gage 

height, 9.8 feet, site and datum then in use).

Remarks.- No diversion or regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

1

S

9

10

May

8,540

7,180

6,320

6,360

5,880

5,650

6,190

6,920

7,020

6,410

June

17,200

17,800

17,800

17,800

17,000

15,900

15,600

15,700

15,600

14,400

July

5,690

5,360

4,930

4,570

4,260

4,000

3,810

3,730

3,500

3,300

Day

11

12

13

14

15

16

17

18

19

20

May

5,900

5,670

6,010

6,430

6,140

6,100

6,820

9,190

13, 200

16,500

June

12,700

11,500

10,600

9,820

9,560

9,050

9,610

10,100

9,330

8,420

July

3,150

3,020

2,890

2,780

2,700

2,640

2,550

2,450

2,410

2,690

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .. . ... ..... ........ ................

Runoff, in inches .......................... . .... ................. .. . .....................................................

May

17,000

19,900

25,300

25,200

22,200

22,000

22,900

23,800

22,100

19,300

17,000

8.84

June

7,990

7,780

7,880

8,140

8,220

7,760

7,160

6,620

6,160

5,880

11,300

7.79

July

2,780

2,650

2,520

2,450

2,350

2,250

2,180

2,550

4,030

4,480

4,830

3,340

2.38

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.35 

6.40 

6.46 

6.56 

6.68 

6.84

6,460 

6,570 

6,710 

6,940 

7,230 

7,630

May 23

11.35 

11.51 

11.68 

11.75 

11.80 

11.82

Mi

11.10 

10.97 

10.86 

10.78 

10.67 

10.62

24,200 

24,900 

25,700 

26,000 

26,300 

26,400

iy29

23,100 

22,500 

22,100 

21,700 

21 , 300 

21,000

June 4

9.88 

9.89 

9.87 

9.84 

9.81 

9.80

17,900 

18,000 

17,900 

17,800 

17,600 

17,600

June 10

9.11 

9.03 

8.96 

8.92 

8.87 

8.78

14,900 

14,600 

14,300 

14,100 

14,000 

13,600

June 16

7.41 

7.37 

7.36 

7.35 

7.36 

7.36

9,150 

9,040 

9,010 

8,980 

9,010 

9,010

Gage 

height Discharge

May 18

7.00 

7.18 

7.39 

7.63 

7.82 

8.01

8,040 

8,520 

9,090 

9,780 

10,400 

11,000

May 24

11.84 

11.79 

11.65 

11.41 

11.26 

11.15

26,400 

26,200 

25,600 

24,500 

23,800 

23,300

May 30

10.50

10.36 

10.19 

10.05 

9.92 

9.83

Ju

9.77 

9.72 

9.65 

9.58 

9.54 

9.48

20,500 

19,900

19,200 

18,600 

18,100 

17,700

ne 5

17,500 

17,300 

17,000 

16,700 

16,500 

16,300

June 11

8.69 

8.61 

3.51 

8.43 

8.37 

8.29

13,300 

13,000 

12,700 

12,400 

12,200 

11,900

June 17

7.40 

7.50 

7.60 

7.67 

7.71 

7.72

9,120 

9,400 

9,690 

9,900 

10,000 

10,100

Gage 

height Discharge

May 19

8.21 

8.42 

8.63 

8.87 

9.08 

9.26

11,600 

12,400 

13,100 

14,100 

14,700 

15,400

May 25

11.03 

10.93 

10.86 

10.81 

10.78 

10.78

M:

9.73 

9.67 

9.62 

9.61 

9.63 

9.62

22 , 800 

22,400 

22,100 

21,900 

21,700 

21,700

iy31

17,300 

17,100 

16,900 

16,800 

16,900 

16,900

June 6

9.44 

9.40 

9.35 

9.32 

9.33 

9.31

16,100 

16,000 

15,800 

15,700 

15,700 

15,600

June 12

8.24 

8.21 

8.18 

8.14 

8.08 

,_ 8.03

11,700 

11,600 

11,500 

11,400 

11,200 

11,000

June 18

7.73 

7.73 

7.73 

7.72 

7.69 

7.64

10,100 

10,100 

10,100 

10,100 

9,960 

9,810

Gage 

height

Mi

9.40 

9.49 

9.57 

9.61 

9.62 

9.63

Discharge

y20

16,000 

16,300 

16,700 

16,800 

16,900 

16,900

May 26

10.78 

10.83 

10.85 

10.83 

10.95 

10.99

21,700 

21,900 

21,900 

21,900 

22,500 

22,600

June 1

9.62 

9.65 

9.67 

9.71 

9.78 

9.82

16,900 

17,000 

17,100 

17,200 

17,500 

17,700

June?

9.28 

9.29 

9.28 

9.29 

9.31 

9.31

15,500 

15,600 

15,500 

15,600 

15,600 

15,600

June 13

7.98 

7.93 

7.88 

7.83 

7.78 

7.71

10,900 

10,700 

10,600 

10,400 

10,200 

10,000

June 19

7.59 

7.53

7.48 

7.42 

7.36 

7.28

9,660 

9,490 

9,340 

9,180 

9,010 

8,790

Gage 

height Discharge

May 21

9.64 

9.63 

9.61 

9.65 

9.70 

9.80

16,900 

16,900 

16,800 

17,000 

17,200 

17,600

May 27

10.96 

10.96 

10.96 

11.10 

11.17 

11.24

22,500 

22,500 

22,500 

23,100 

23,400 

23,700

June 2

9.83 

9.85 

9.84 

9.85 

9.86 

9.86

Ju

9.32 

9.34 

9.34 

9.35 

9.35 

9.33

17,700 

17,800 

17,800 

17,800 

17,800 

17,800

ne8

15,700 

15,700 

15,700 

15,800 

15,800 

15,700

June 14

7.65 

7.63 

7.63 

7.63 

7.64 

7.64

9,840 

9,780 

9,780 

9,780 

9,810 

9,810

June 20

7.23 

7.17 

7.14 

7.10 

7.07 

7.05

8,650 

8,490 

8,410

8,300 

8,220 

8,170

Gage 

height

M:

9.93 

10.05 

10.28 

10.52 

10.81 

11.09

Discharge

iy22

18,100 

18,600 

19,600 

20,600 

21,900 

23,100

May 28

11.31 

11.39 

11.30 

11.21 

11.16 

11.13

24,000 

24,400 

24,000 

23,600 

23,400 

23,300

June 3

9.84 

9.83 

9.84 

9.86 

9.87 

9.88

Ju

9.31 

9.33 

9.31 

9.31 

9.27 

9.19

17,800 

17,700 

17,800 

17,800 

17,900 

17,900

ne9

15,600 

15,700 

15,600 

15,600 

15,500 

15,200

June 15

7.62 

7.59 

7.57 

7.53 

7.48 

7.44

9,750 

9,660 

9,600 

9,490 

9,340 

9,230

June 21

7.02 

7.00 

6.97 

6.96

6.95 

6.92

8,090 

8,040 

7,960 

7,940 

7,910 

7,830
PEND OREILLE RIVER BASIS 113

Plathead River at Columbia Palls, Mont.

Location.- Lat. 48°22', long. 114°11', in SW£ sec. 17, T. 30 N., R. 20 W., 200 feet

downstream from highway bridge at Columbia Palls and 5 miles downstream from South

Pork. Datum of gage is 2,978.00 feet above-mean sea level, datum of 1929 (levels

by Corps of Engineers). 

Drainage area.- 4,440 square miles. 

Gage-height record.- Water-stage recorder graph except 12 p.m. May 21 to 10 a.m.

May 22, for which partly estimated graph was drawn. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

83,400 second-feet and extended to peak stage on basis of revised figure for 1894

peak. Gage heights used to hundredths. Discharge obtained by shifting-control

method July 6-31. 

Maxima.- May-June 1948: Discharge, 102,000 second-feet 9 a.m. May 23 (gage height,

19.08 feet).

1922-23, 1928 to April 1948: Discharge, 102,000 second-feet June 1, 1923 (gage

height, 17.3 feet).

Maximum stage known, 22.7 feet in June 1894, from floodmarks (discharge, 135,000

second-feet, revised). 

Remarks.- No diversion.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

29,000

24,200

21,600

21,400

20,300

19,600

21,600

26,200

27,200

24,400

June

61,200

64,400

66,500

72,500

66,100

58,900

56,900

57,400

56,200

50,600

July

18,100

16,800

15,400

14,100

13,200

12,600

11,900

11,200

10,400

9,740

Day

11

12

13

14

15

16

17

18

19

20

May

22,200

20,800

22,200

24,800

23,200

22,700

25,800

38,700

55,300

65,700

June

44,200

39,200

35,500

33,000

31,900

30,600

33,500

33,500

30,100

27,000

July

9,230

8,810

8,350

7,990

7,690

7,430

7,120

6,900

6,800

7,380

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..... . . . ...... . ...

Runoff, in inches ......................................... .................... ... ... ....................................................

May

71,500

89,000

99,400

84,100

75,500

78,900

83,900

8 4, -100

75,400

64,200

58,100

45,840

11.87

June

25,900

25,100

25,000

25,400

25,300

23,600

22,000

20,500

19,600

19,000

39,350

9.88

July

7,640

7,170

6,820

6,700

6,400

6,020

5,810

6,450

8,990

9,680

9,980

9,445

2.46

Gage height, in feet, and, discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

8.60 

8.78 

9.00 

9.19 

9.40 

9.74

23,700 

24,600 

25,700 

26,600 

27,800 

29,700

May 23

18.97 

19.07 

19.01 

18.86 

18.50 

18.16

M:

16.51 

16.30 

16.04 

15.83 

15.60 

15.39

Jl

15.55 

15.77 

15.88 

15.88 

15.73 

15.56

101,000 

102,000 

101,000 

99,700 

96,500 

93,400

iy29

79,300 

77,600 

75,300 

73,600 

71,600 

69,800

ne 4

71,200 

73,000 

74,000 

74,000 

72,700 

71,300

June 10

13.19 

13.07 

12.97 

12.87 

12.75 

12.57

Ju

9.93 

9.90 

9.87 

9.89 

9.92 

10.00

52,200 

51,300 

50,600 

49,800 

49,000 

47,700

ne!6

30,700 

30,600 

30,400 

30,500 

30,700 

31,100

Gage 

height Discharge

May 18

10.27 

10.85 

11.38 

11.76 

12.04 

12.32

32,700 

36,200 

39,600 

42,000 

44,000 

45,900

May 24

17.84 

17.43 

17.10 

16.68 

16.27 

16.07

M

15.22 

14.97 

14.67 

14.44 

14.21 

14.03

90,600 

87,200 

84,400 

80,800 

77,300 

75,600

iy30

68,400 

66,300 

63,900 

62,000 

60,200 

58,700

June 5

15.37 

15.13 

14.93 

14.72 

14.51 

14.37

69,600 

67,600 

65,900 

64,300 

62,600 

61,500

June 11

12.40 

12.23 

12.05 

11.91 

11.76 

11.65

46,500 

45,300 

44,000 

43,100 

42,000 

41,300

June 17

10.08 

10.22 

10 .'41 

10.64 

10.70 

10.66

31,600 

32,400 

33,600 

34,900 

35,300 

35,100

Gage 

height Discharge

May 19

12.87 

13.36 

13.72 

13.99 

14.21 

14.36

49,800 

53,500 

56,300 

58,400 

60,200 

61,400

May 25

16.03 

16.09 

16.12 

16.08 

16.00 

16.04

75,300 

75,800 

76,000 

75,700 

75,000 

75,300

May 31

13.98 

13.97 

13.94 

13.92 

13.88 

13.95

58,300 

58,300 

58,000 

57,900 

57,500 

58,100

June 6

14.27 

14.18 

14.08 

13.93 

13.79 

13.76

60,700 

59,900 

59,100 

57,900 

56,800 

56,600

June 12

11.54 

11.45 

11.34 

11.21 

11.09 

10.99

40,600 

40,000 

39,300 

38,500 

37,700 

37,000

June 18

10.55 

10.46 

10.43 

10.32 

10.22 

10.13

34,400 

33,900 

33,700 

33,000 

32,400 

31,900

Gage 

height Discharge

May 20

14.54

14.74 

14.93 

15.08 

15.24 

15.36

62,800 

64,400 

65,900 

67,200 

68,500 

69,600

May 26

16.21 

16.46 

16.61 

16.61 

16.57 

16.61

76,800 

78,900 

80,200 

80,200 

79,800 

80,200

June 1

14.12 

14.35 

14.44 

14.47 

14.45 

14.52

Jl

13.81 

13.85 

13.85 

13.79 

13.72 

13.77

59,500 

61,100 

62,000 

62,300 

62,100 

62,700

ne 7

57,000 

57,300 

57,300 

56,800 

56,300 

56,700

June 13

10.88 

10.80 

10.74 

10.67 

10.57 

10.48

36,400 

35,900 

35,500 

35,100 

34,500 

34,000

June 19

10.02 

9.90 

9.81 

9.72 

9.60 

9.49

31,200 

30,600 

30,100 

29,600 

28,900 

28,300

Gage 

height Discharge

May 21

15.46 

15.53

15.56 

15.56 

15.71 

16.04

70,400 

71,000 

71,300 

71,300 

72,500 

75,300

May 27

16.84 

17.06 

17.20 

17.18 

17.14 

17.15

82,100 

84,000 

85,200 

85,000 

84,700 

84,800

June 2

14.66 

14.80 

14.86 

14.79 

14.71 

14.72

63,800 

64,900 

65,400 

64,800 

64,200 

64,300

June 8

13.88 

13.98 

14.00 

13.87 

13.72 

13.71

Ju

10.38 

10.37 

10.34 

10.28 

10.23 

10.20

57,500 

58,300 

58,500 

57,500 

56,300 

56,200

ne 14

33,400 

33,300 

33,100 

32,800 

32,500 

32,300

June 20

9.42 

9.32 

9.26 

9.18 

9.11 

3.07

27,900 

27,400 

27 , 000 

26,600 

26,200 

26,000

Gage 

height Discharge

May 22

16.6 

17.1 

17.87 

18.29 

18.57 

18.76

80,100 

84,400 

90,900 

94,600 

97,100 

98,800

May 28

17.26 

17.33 

17.18 

17.00 

16.78 

16.58

85,700 

86,300 

85,000 

83,500 

81,600 

79,900

June 3

14.79 

14.92 

15.04 

15.08 

15.13 

15.29

Jl

13.78 

13.85 

13.82 

13.72 

13.54 

13.38

64,800 

65,900 

66,800 

67,200 

67,600 

69,000

ne 9

56,700 

57,300 

57,100 

56,300 

54,800 

53,600

June 15

10.19 

10.18 

10.17 

10.12 

10.04 

9.97

32,200 

32,200 

32,100 

31,800 

31,300 

30,900

June 21

9.08 

9.07 

9.06 

3.03 

8.99 

3.96

26,100 

26,000 

26, -WO 

25,800 

25,600 

25,500

Supplemental record.- May 23, 9 a.m., 19.08 ft., 102,000 sec.-ft.
L14 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Plathead Lake at Somers, Mont.

Location.- Lat. 48°04', long. 114°13', in NEi}- sec. 26, T. 27 N., R. 21 W., at steamboat 

dock at Somers. Datum of gage is at mean sea level (Somers datum).

Drainage area.- 6,990 square miles.

Gage-height record.- Water-stage recorder graph except July 10-11, which was computed 

on basis of graph through twice-daily staff-gage readings. Elevations at 12 p.m. 

used to determine contents.

Maxima.- May-June 1948: Contents, 2,175,000 acre-feet 6 to 7 p.m. June 6 (elevation, 

S78"9~6.01 feet).

1922 to April 1948: Contents, 2,208,000 acre-feet June 19, 1933 (elevation, 

2,896.26 feet).

Remarks.- Since April 1938 elevation has been subject to regulation by Kerr Dam, 4 miles 

below outlet. No major regulation May 1 to June 29, 1948. Slight diversion and regulation above Flathead Lake.

Elevation, in feet, and contents, in acre-feet, at 12 p.m. of indicated day

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change in

contents

acrefeet

May

Elevation

2,886.36

2,886.57-

2,886.78

2,886.87

2,886.97

2,887.03

2,887.21

2,887.39

2,887.54

2,887.66

2,887.76

2,887.81

2,887.87

2,887.96

2,888.00

2,888.03

2,888.10

2,888.26

2,888.69

2,889.29

2,889.93

2,890.69

2,891.56

2,892.39

2,893.01

2,893.50

2,894.00

2,894.52

2,894.99

2,895.30

2,895.43

Acre-feet

973,800

999,100

1,024,000

1,035,000

1,047,000

1,055,000

1,076,000

1,098,000

1,116,000

1,131,000

1,143,000

1,149,000

1,156,000

1,167,000

1,172,000

1,176,000

1,184,000

1,204,000

1,256,000

1,330,000

1,408,000

1,503,000

1,610,000

1,714,000

1,792,000

1,854,000

1,917,000

1,984,000

2,044,000

2,084,000

2,100,000

+1,161,000

June

Elevation

2,895.47

g2,895.50

2,895.66

2,895.80

2,895.96

2,896.00

2,895.97

2,895.94

2,895.88

2,895.74

2,895.63

2,895.39

2,895.11

2,894.81

2,894.45

2,894.14

2,893.85

2,893.59

2,893.34

2,893.09

2,892.81

2,892.54

2,892.25

2,892.01

2,891.78

2,891.54

2,891.32

2,891.09

2,890.90

2,891.10

Acre-feet

2,106,000

2,110,000

2,130,000

2,148,000

2,169,000

2,174,000

2,170,000

2,166,000

2,159,000

2,140,000

2,126,000

2,095,000

2,059,000

2,021,000

1,975,000

1,935,000

1,898,000

1,865,000

1,834,000

1,802,000

1,767,000

1,733,000

1,696,000

1,666,000

1., 638, 000

1,608,000

1,581,000

1,552,000

1,529,000

1,553,000

-547,000

July

Elevation

2,891.41

2,891.67

2,891.89

2,892.05

2,892.24

2,892.42

2,892.56

2,892.68

2,892.82

2,892.94

g2,892.95

2,892.93

2,892.89

2,892.83

2,892.81

2,892.85

2,892.90

2,892.90

2,892.97

2,893.02

2,892.94

2,892.86

2,892.82

2,892.82

2,892.85

2,892.85

2,892.98

2,892.98

2,892.87

2,892.80

2,892.77

Acre-feet

1,592,000

1,624,000

1,651,000

1,671,000

1,695,000

1,718,000

1,736,000

1,751,000

1,768,000

1,783,000

1,785,000

1,782,000

1,777,000

1,770,000

1,767,000

1,772,000

1,778,000

1,778,000

1,787,000

1,794,000

1,783,000

1,773,000

1,768,000

1,768,000

1,772,000

1,772,000

1,788,000

1,788,000

1,775,000

1,766,000

1,762,000

+209,000

g Graph based on observer's twice-daily readings.
PEND OREILLE RIVER BASUf

Flathead River near Poison, Mont.

Location.- Lat. 47°41', long. 114"15', in NW^SEi sec. 11, T. 22 N., R. 21 W., half a

mile downstream from Kerr Dam and 6 miles downstream from Poison. 

Drainage area.- 6,990 square miles. 

flage-helght record.- Water-stage recorder graph. 

Discharge record.- Stage -discharge relation defined by current-meter measurements below

71,200 second-feet and extended to peak stage. Gage heights used to hundredths. 

Maxima . - May-June 1948: Discharge, 73,200 second-feet 10 a.m. June 6 (gage height,

19.15 feet) .

1907 to April 1948: Discharge, 82,100 second-feet May 29, 30, 1928 (gage height,

17.1 feet, site and datum then in use). 

Remarks . - Several small diversions from tributaries above Flathead Lake. Plow regulated

since April 1938 by Flathead Lake. Numerous small fluctuations caused by power plant

half a mile upstream not shown in detail in table of gage height and discharge at

indicated time.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

17,000

18,500

19,300

19,800

20,700

21,000

21,500

22,400

23,600

24,300

June

70,200

70,400

70,900

71,800

72,400

72,700

72,400

71,500

71,300

71,000

July

4,400

4,420

5,050

5,530

5,920

6,320

6,630

6,840

4,830

5,630

Day

11

12

13

14

IB

16

17

18

19

20

May

24,700

25,100

25,100

25,400

26,200

26,500

26,800

27,400

29,200

31,600

June

69,800

68,300

66,600

64,300

62,200

59,800

58,000

56,400

54,600

52,700

July

9,380

14,100

14,700

14,600

11,900

7,140

6,790

7,780

8,080

12,700

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .................. . ... ................

Runoff, in inches ........................... ..............................................................................................

May

34,600

38,200

42,500

47,600

52,200

55,500

58,800

62,200

65,200

67,900

69,500

34^533

- 5.70

June

51,200

49,600

48,200

47,200

45,700

44,800

42,900

41,000

34,600

12,500

58,170

9.29

July

15,300

15,200

13,400

8,550

6,840

6,960

6,960

10,800

14,600

16,200

15,800

9,463

1.56

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

11.11 

11.15 

11.14 

11.13 

11.16 

11.20

26,700 

26,900 

26,800 

26,800 

26,900 

27,100

May 23

14.02 

14.23 

14.30 

14.49 

14.64 

14.76

M

17.80 

17.98 

18.00 

18.12 

18.20 

18.27

40,800 

42,000 

42 ,400 

43,400 

44,200 

44,900

iy29

63,700 

65,000 

65,100 

65,900 

66,500 

67,000

Juue4

18.92 

18.95 

18.96 

18.98 

19.00 

19.03

71,500 

71,800 

71,800 

72,000 

72,100 

72,300

June 10

18.85 

18.91 

18.84 

18.83 

18.78 

18.75

Ju

17.26 

17.26 

17.23 

17.10 

17.13 

17.06

71,000 

71,500 

71,000 

70,900 

70,600 

70,400

ne 16

60,200 

60,200 

60,000 

59,200 

59,300 

58,900

Gage 

height Discharge

May 18

11.17 

11.28 

11.26 

11.28 

11.34 

11.40

26,900 

27,400 

27,400 

27,400 

27,700 

28,000

May 24

14.89 

15.10 

15.28 

15.43 

15.53 

15.69

M

18.28 

18.33 

18.42 

18.48 

18.49 

18.57

Ju

19.02 

18.04 

19.03 

19.06 

19.08 

19.08

J«

18.75 

18.72 

18.66 

18.63 

18.60 

18.42

45,600 

46,800 

47,900 

48,800 

49,400 

50,300

iy30

67,100 

67,400 

68,000 

68,500 

68,500 

69,100

ne5

72,200 

72,400 

72,300 

72,500 

72,700 

72,700

nell

70,400 

70,100 

69,700 

69,500 

69,300 

68,000

June 17

16.99 

17.05 

16.92 

16.90 

16.82 

16.76

58,400 

58,800 

58,000 

57,800 

57,300 

57,000

Gage 

height Discharge

May 19

11.45 

11.70 

11.62 

11.70 

11.90 

11.89

28,200 

29,400 

29,000 

29,400 

30,300 

30,300

May 25

15.76 

15.90 

16.02 

16.12 

16.19 

16.28

M:

18.58 

18.67 

18.63 

18.66 

18.63 

18.63

Jl]

19.10 

19.10 

19.08 

19.06 

19.06 

19.06

50,800 

51,600 

52,300 

52,900 

53,300 

53,900

iy31

69,200 

69,800 

69,500 

69,700 

69,500 

69,500

ne6

72,800 

72,800 

72,700 

72,500 

72,500 

72,500

June 12

18.51 

18.47 

18.48 

18.43 

18.41 

18.38

68,700 

68,400 

68,500 

68 , 100 

68,000 

67,800

June 18

16.69 

16.73 

16.70 

16.67 

16.59 

16.54

56,500 

56,700 

56,600 

56,400 

55,800 

55,500

Gage 

height Discharge

May 20 x

11.90 

12.13 

12.24 

12.27 

12.36 

12.51

30,300 

31,400 

31,900 

32,100 

32,500 

33,200

May 26

16.32 

16.44 

16.54 

16.63 

16.73 

16.79

54,100 

54,900 

55,500 

56,100 

56,700 

57,100

June 1

18.67 

18.74 

18.75 

18.74 

18.74 

18.77

Jl

19.04 

19.07 

19.08 

19.06 

19.00 

18.99

69,800 

70,300 

70,400 

70,300 

70,300 

70,500

ne7

72,400 

72,600 

72,700 

72,500 

72,100 

72,000

June 13

18.28 

18.31 

18.21 

18.17 

18.09 

18.04

Ju

16.46 

16.48 

16.40 

16.34 

16.31 

16.17

67,100 

67,300 

66,600 

66,300 

65,700 

65,400

me 19

55,000 

55,100 

54,600 

54,200 

54,100 

53,200

Gage 

height Discharge

May 21

xI2.56 

12.70 

12.81 

12.91 

13.04 

13.13

33,400 

34,100 

34,600 

35,200 

35,800 

36,200

May 27

16.82 

16.94 

17.03 

17.17 

17.29 

17.34

Ju

18.70 

18.80 

18.79 

18.74 

18.82 

18.72

Ju

18.96 

18.95 

18.92 

18.86 

18.84 

18.88j

57,300 

58,100 

58,700 

59,600 

60,400 

60,700

ne2 "^

70,000 

70,700 

70,600 

70,300 

70,800 

70,100

ne8

71,800 

71,800 

71,500 

71,100 

71,000 

71,300

June 14

17.90 

17.99 

17.94 

17.86 

17.77 

17.72

64,400 

65,000 

64,700 

64,100 

63,500 

63,200

June 20

16.18 

16.14 

16.08 

16.04 

16.03 

15.92

53,300 

53,000 

52,700 

52,400 

52,400 

51,700

Gage 

height Discharge

May 22

13.25 

13.56 

13.52 

13.66 

13.72 

13.80

36,800 

38,400 

38,200 

38,900 

39,200 

39,600

May 28

17.35 

17.47 

17.57 

17.65 

17.77 

17.79

60,800 

61,600 

62,200 

62,700 

63,500 

63,300

June 3

18.76 

18.85 

18.83 

18.87 

18.86 

18.88

Jl

18.86 

18.90 

18.93 

18.90 

18.87 

18.87

70,400 

71,000 

70,900 

71,200 

71,100 

71,300

ne9

71,100 

71,400 

71,600 

71,400 

71,200 

71,200

June 15

17.61 

17.68 

17.55 

17.57 

17.43 

17.42

62,500 

62,900 

62,100 

62,200 

61,300 

61,200

June 21

15.89 

15.95 

15.85 

15.79 

15.71 

15'. 68

51,500 

51,900 

51,300 

50,900 

50,500 

50,300

Supplemental record.- May 17, 2 a.m., 11.08 ft., 26,600 sec.-ft.; May 18, 2 a.m., 

11.12 ft., 26,700 sec.-ft., 6 a.m., 11.18 ft., 27,000 sec.-ft.; May 19, 6 a.m., 11.53 ft 

28,600 sec.-ft.; May 20, 6 a.m., 11.92 ft., 30,400 sec.-ft.; May 22, 6 a.m., 13.28 ft., 

37,000 sec.-ft.; May 24, 2 a.m., 14.77 ft., 44,900 sec.-ft., 6 a.m., 14.97 ft., 46,000 

see.-ft.; June 6, 10 a.m., 19.15 ft., 73,200 sec.-ft.; June 11, 10 p.m., 18.61 ft., 

69,400 sec.-ft.
116 FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Middle Fork Flathead River at Essex, Mont.

Location.- Lat. 48°16 I , long. 113°36', in SW£ sec. 14, T. 29 N., R. 16 W., 0.6 mile 

upstream from Ole Creek, 0.7 mile southeast of Essex, and 4 miles downstream from 

Bear Creek.

Drainage area.- 517 square miles.

Gage-height record.- Water-stage recorder graph except for period 8 a.m. May 20 to 

5 p.mT May 22 for which a graph was drawn based on fragmentary record and daily 

staff-gage readings and for period July 18 to 20.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

9,400 second-feet and extended to peak stage. Gage heights used to hundredths. Discharge interpolated July 18-20.

Maxima.- May-June 1948: Discharge, 14,500 second-feet 8 p.m. May 22 (gage height, 

10.95 feet, from partly estimated gage-height record).

1939 to April 1948: Discharge, 9,800 second-feet June 18, 1943 (gage height, 9.45 

feet).

Remarks.- Flood flow not affected by storage or diversion.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,760

2,290

2,060

2,120

1,930

1,940

2,280

2,820

2,790

2,360

June

7,600

7,800

8,260

8,870

7,850

7,050

6,760

6,570

6, 11C

5,120

July

1,730

1,590

1,450

1,350

1,270

1,190

1,120

1,040

982

93C

Day

11

12

13

14

15

16

17

18

19

20

May

2,070

1,920

2,260

2,560

2,350

2,530

3,430

6,080

8,190

8,820

June

4,280

3,870

3,470

3,190

3,110

3,210

4,360

4,10C

3,460

3,030

July

895

847

808

762

730

712

676

680

680

800

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet...

Runoff, in inches ...........................................................................................................................

May

9,390

13,600

12,000

9,020

9,020

9,730

10,300

9,460

7,980

6,740

6,840

12.11

June

2,850

2,760

2,680

2,580

2,500

2,360

2,220

2,100

2,000

1.85O

9.50

July

640

594

566

550

525

505

492

540

588

577

515

849

1.89

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

£

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.77 

5.89 

5.96 

6.08 

6.38 

6.86

3,000 

3,170 

3,270 

3,450 

3,930 

4,750

May 23

10.69 

10.38 

10.00 

9.73 

9.48 

9.38

M:

8.65 

8.57 

8.48 

8.38 

8.29 

8.20

13,700 

12,800 

11,800 

11,000 

10,400 

10,100

»y29

8,380 

8,200 

8,000 

7,780 

7,580 

7,380

June 4

9.07 

9.02 

8.85 

8.74 

8.71 

8.63

9,370 

9,250 

8,840 

8,590 

8,520 

8,340

June 10

7.25 

7.17 

7.09 

6.97 

6.87 

6.76

Ju

5.84 

5.85 

5.90 

5.94 

6.04 

6.04

5,460 

5,310 

5,160 

4,950 

4,770 

4,570

ne!6

3,100 

3,110 

 3,180 

3,240 

3,39O 

3,390

Gage 

height Discharge

May 18

7.31 

7.50 

7.52 

7.61 

7.86 

8.25

5,580 

5,940 

5,980 

6,160 

6,670 

7,490

May 24

9.23 

9.03 

8.82 

8.68 

8.67 

8.82

M

8.08 

7.95 

7.84 

7.72 

7.74 

7.84

Ju

8.56 

8.54 

8.41 

8.29 

8.25 

8.23

9,750 

9,270 

8,780 

8,450 

8,430 

8,780

»y30

7,130 

6,860 

6,620 

6,3SO 

6,420 

6,620

ne5

8,180 

8,130 

7,840 

7,580 

7,490 

7,450

June 11

6.67 

6.62 

6.58 

6.53 

6.51 

6.50

4,420 

4,330 

4,270 

4,180 

4,150 

4,130

June 17

6.31 

6.63 

6.84 

6.85 

6.78 

6.70

3,820 

4,350 

4,710 

4,730 

4,610 

4,470

Gage 

height Discharge

May 19

8.53 

8.66 

8.67 

8.58 

8.54 

L 8.58

8,110 

8,410 

8,430 

8,220 

8,130 

8,220

May 25

8.97 

8.95 

8.86 

8.79 

8.95 

9.21

9,130 

9,080 

8,870 

8,7-10 

9,080 

9,700

May 31

7.94 

7.95 

7.90 

7.88 

7.97 

8.20

Jl

8.22 

8.12 

7.99 

7.91 

7.91 

7.99

6,830 

6,860 

6,750 

6,710 

6,900 

7,380

ne6

7,420 

7,210 

6,940 

6,770 

6,770 

6,940

June 12

6.46 

8.40 

6.34 

6.27 

5.23 

6.20

4,060 

3,960 

3,860 

3,750 

3,690 

3,640

June 18

6.63 

6.55 

6.48 

6.40 

6.33 

6.26

4,350 

4,220 

4,100 

3,960 

3,850 

3,740

Gage 

height Discharge

May 20

8.66 

8.77 

8.9 

9.0 

8.97 

8.89

8,410 

8,660 

8,960 

9,200 

9,130 

8,940

May 26

9.37 

9.32 

9.16 

9.03 

9.13 

9.42

10,100 

9,970 

9,580 

9,270 

9,510 

10,200

June 1

8.37 

8.36 

8.28 

8.17 

8.28 

8.45

7,750 

7,730 

7,560 

7,320 

7,560 

7,930

June 7

8.02 

7,94 

7.83 

7.78 

7.87 

7.98

7,000 

6,830 

6,600 

6,500 

6,690 

6,920

June 13

6.17 

6.14 

6.10 

6.05 

6.01 

5.98

3,590 

3,540 

3,480 

3,400 

3,340 

3,300

June 19

6.20 

6.14 

6.08 

6.02 

5.96 

5.91

3,640 

3,540 

3,450 

3,360 

3,270 

3,200

Gage 

height Discharge

May 21

8.88 

8.90 

8.88 

9.00 

9.34 

10.0

8,910 

8,960 

8,910 

9,200 

10,000 

11,800

May 27

9.62 

9.60 

9.46 

9.33 

9.33 

9.32

10,800 

10,700 

10,300 

10,000 

10,000 

9,970

June 2

8.55 

8.48 

8.33 

8.24 

8.28 

8.43

Ju

7.99 

7.89 

7.75 

7.66 

7.69 

7.79

8,160 

8,000 

7,670 

7,470 

7,560 

7,890

ne 8

6,940 

6,730 

6,440 

6,260 

6,320 

6,520

June 14

5.96 

5.93 

5.90 

5.86 

5.86 

5.89

3,270 

3,220 

3,180 

3,120 

3,120 

3,170

June 20

5.86 

5.82 

5.78 

5.74 

5.73 

5.71

3,120 

3,070 

3,010 

2,960 

2,940 

2,910

Gage 

height Discharge

May 22

10.40 

10.53 

10.58 

10.81 

10.95 

10.90

12,900 

13,300 

13,400 

14,100 

14,500 

14,400

May 28

9.39 

9.32 

9.11 

8.95 

8.82 

8.72

Ju

8.57 

8.56 

8.52 

8. SB 

8.68 

8.91

Ju

7.80 

7.69 

7.58 

7.49 

7.39 

7.32

10,200 

9,970 

9,460 

9,080 

8,780 

8,550

ne3

8,200 

8,180 

8,090 

8,220 

8,450 

8,980

ne9

6,540 

6,320 

6,100 

5,920 

5,730 

5,600

June 15

5.90 

5.89 

5.83 

5.80 

5.80 

5.83

3,180 

3,170 

3,080 

3,040 

3,040 

3,080

June 21

5.71 

5.71 

5.68 

5.62 

5.61 

5.62

2,910 

2,910 

2,870 

2,790 

2,770 

2,790

Supplemental record.- June 17, 2 p.m., 6.87 ft., 4,770 sec.-ft.
PEHD OREILLE RIVER BASIN 117

Middle Pork Plathead River near Belton, Mont.

Location.- Lat. 48°29'50" J long. 1140 00'30", in NE£ sec. 34, T. 32 N., R. 19 W., threequarters of a mile downstream from McDonald Creek, l£ miles west of Belton, and 3§

miles upstream from mouth. 

Dr a 1nage area.- 1,140 square miles, 

gage-height record.- Graph drawn on basis of once-daily staff-gage readings, comparison

with other Plathead River stations, and crest gage height obtained from floodmark. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

20,500 second-feet and extended to peak stage. Gage heights used to hundredths. 

Maxima.- Hay-June 1948: Discharge, 32,600 second-feet 4 p.m. May 23 (gage height, 12.40

feet, from floodmark).

1939 to April 1948: Discharge observed, 20,600 second-feet June 18, 1943 (gage

height, 9.00 feet). 

Remarks.- No regulation or diversion.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

7,340

6,400

5,870

5,760

5,420

5,250

5,730

6,950

7,400

6,680

June

16,800

18,300

19,000

20,800

18,500

16,700

16,500

16,900

16,700

14,900

July

5,920

5,670

5,390

5,030

4,560

4,270

4,020

3,740

3,490

3,250

Day

11

12

13

14

15

16

17

18

19

20

May

5,840

5,560

5,920

6,890

6,860

6,680

7,670

11,800

16,400

19,700

June

13,300

11,500

9,710

9,300

9,370

9,480

10,900

10,900

9,880

9,210

July

3,120

2,890

2,690

2,500

2,330

2,280

2,260

2,170

2,120

2,170

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .... . ..... .... ... . ........................ . . .... .................

Runoff, in inches ............................................................................................................................

May

20,800

26,200

31,800

26,200

22,800

24,200

25,200

24,300

21,900

17,900

16,000

13.49

June

8,750

8,760

8,700

8,360

8,170

7,770

7,220

6,680

5,270

6,100

11,850

11.60

July

2,320

2,170

2,120

2,020

1,880

1,820

1,820

1,860

2,150

2,250

2,120

3.01

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 '8 

12

Gage 

height Discharge

May 17

4.90 

4.98 

5.14 

5.32 

.5.46 

5.52

6,860 

7,100 

7,580 

8,140 

8,580 

8,760

May 23

12.12 

12.30 

12.30 

12.40 

12.15 

11.72

Mi

9.78 

9.61 

9.48 

9.34 

9.18 

9.05

Jll

8.80 

9.10 

9.38 

9.50 

9.38 

9.10

31,600 

32,200 

32,200 

32,600 

31,700 

30,000

iy29

23,000 

22,400 

21,900 

21,400 

20,800 

20,400

ne4

19,500 

20,500 

21,500 

22,000 

21,500 

20,500

June 10

7.50 

7.30 

7.15

Ju

5.70 

5.75 

5.87

15,200 

14,500 

14,000

ne!6

9,340 

9,500 

9,880

Gage 

height Discharge

May 18

5.72 

6.20 

6.67 

6.93 

7.02 

7.06

9,400 

10,900 

12,400 

13,300 

13,600 

13,700

May 24

11.40 

11.10 

10.71 

10.22 

9.90 

9.68

Mi

8.97 

8.66 

8.28 

7.92 

7.70 

7.63

Ju

8.84 

8.55 

8.42 

8.35 

8.26 

8.13

Ju

7.00 

6.86 

6.69

28,800 

27,700 

26,300 

24,600 

23,400 

22,600

iy30

20,100 

19,000 

17,800 

16,500 

15,800 

15,600

ne 5

19,700 

18,700 

18,200 

18,000 

17,700 

17,200

nell

13,500 

13,100 

12,500

June 17

6.00 

6.30 

6.45

10,300 

11,300 

11,700

Gage 

height Discharge

May 19

7.21 

7.57 

7.95 

8.30 

8.49 

8.50

14,200 

15 , 400 

16,600 

17,800 

18,500 

18,500

May 25

9.54 

9.65 

9.93 

9.99 

9.73 

9.60

Mi

7.64 

7.70 

7.80 

7.83 

7.83 

7.75

22,100 

22,500 

23,500 

23,700 

22,800 

22,300

iy3l

15,600 

15,800 

16,100 

16,200 

16,200 

16,000

June 6

8.00 

8.00 

7.97 

7.94 

7.90 

7.85

16,800 

16,800 

16,700 

16,600 

16,500 

16,300

June 12

6.50 

6.29 

6.02

11,900 

11,200 

10,400

June 18

6.27 

6.09 

5.99

11,200 

10,600 

10,300

Gage 

height Discharge

May 20

8.55 

8.67 

8.83 

9.00 

9.19 

9.27

18,700 

19,100 

19,600 

20 , 200 

20,800 

21,100

May 26

9.64 

9.90 

10.27 

10.50 

10.42 

10.23

22,500 

23,400 

24,700 

25,600 

25,300 

24,600

June 1

7.68 

7.80 

8.10 

8.30 

8.26 

8.17

15,700 

16,100 

17,100 

17,800 

17,700 

17,400

June 7

7.76 

7.80 

7.98 

8.06 

8.00 

7.92

16,000 

16,100 

16,700 

17,000 

16,800 

16,500

June 13

5.80 

5.76 

5.74

9,660 

9,530 

9,470

June 19

5.89 

5.83 

5.77

9,950 

9,760 

9,560

Gage 

height Discharge

May 21

9.30 

9.23 

9.13 

9.05 

9.08 

9.18

21,200 

21,000 

20,600 

20,400 

20,500 

20,800

May 27

10.00 

10.12 

10.50 

10.75 

10.69 

10.50

23,800 

24,200 

25,600 

26,500 

26,200 

25,600

June 2

8.21 

8.40 

8.57 

8.58 

8.50 

8.44

17,500 

18,200 

18,700 

18,800 

18,500 

18,300

June 8

7.90 

7.96 

8.17 

8.12 

8.04 

7.98

16,500 

16,700 

17,400 

17,200 

16,900 

16,700

June 14

5.70 

5.67 

5.65

9,340 

9,240 

9,180

June 20

5.69 

5.63 

5.54

9,310 

9,120 

8,830

Gage 

height Discharge

May 22

9.50 

10.00 

10.80 

11.50 

11.77 

11.84

22,000 

23,800 

26,600 

29,200 

30,200 

30,500

May 28

10.20 

10.08 

10.10 

10.13 

10.14 

10.00

Ju

8.49 

8.67 

8.71 

8.72 

8.71 

8.67

Ju

7.96 

7.99 

8.07 

8.00 

7.88 

7.75

24,500 

24,000 

24,100 

24,200 

24,300 

23,800

ne3

18,500 

19,100 

19,200 

19,200 

19,200 

19,100

ne9

16,700 

16,800 

17,000 

16,800 

16,400 

16,000

June 15

5.70 

5.75 

5.70

9,340 

9,500 

9,340

June 21

5.50 

5.51 

5.53

8,700 

8,730 

8,800
118 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Bear Creek near Essex, Mont.

Location.- Water-stage recorder, lat. 48°16"50", long. 113°25'30", near south line of 

sec. 7, T. 29 N., R. 14 W., 0.8 mile downstream from Autumn Creek and 8^ miles northeast of Essex. 

'Drainage area.- 20.7 square miles.

Gage-height record.- Water-stage recorder graph except for periods May 23 to 1 p.m. May 

24, 2 p.m. to 12 p.m. June 5, 1 a.m. to 5 a.m. June 8, 7 p.m. July 4 to 9 a.m. July 

5, when gage heights were estimated on basis of records for Skyland Creek near Essex.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

300 second-feet and extended to peak stage. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 696 second-feet 1:30 p.m. May 22 (gage height, 3.01

1946 to April 1948: Discharge, 623 second-feet May 2, 1947 (gage height, 2.87 

feet). 

Remarks.- No diversion or regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

99

88

84

83

80

87

103

118

106

91

June

267

268

308

351

290

245

222

201

182

160

July

65

60

57

53

50

44

43

« 40

37

37

Day

11

12

13

14

15

16

17

18

19

May

83

84

99

95

95

110

164

264

309

304

June

155

150

132

116

114

165

262

214

177

150

July

35

34

31

29

29

29

28

28

27

28

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ...... ............ft..........................................

Runoff, in inches ................................ ....................................................

May

363

519

420

314

326

349

368

319

281

254

257

204

11.37

June

133

127

118

116

109

99

91

84

79

74

172

9.27

July

26

26

25

24

22

21

21

24

26

23

21

33.6

1.87

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

1.45 

1.43 

1.42 

1.70 

1.84 

1.83

134 

129 

127 

191 

226 

224

May 23

2.57 

2.48 

2.40 

2.34 

2.32 

2.28

478 

438 

405 

382 

375 

360

May 29

2.06 

2.02 

2.03 

2.06 

2.04 

2.00

286 

275 

278 

286 

281 

269

June 4

2.33 

2.28 

2.26 

2.24 

2.18 

2.18

Ju

1.50 

1.59 

1.58 

1.55 

1.54 

1.52

378 

360 

352 

345 

324 

324

nelO

167 

165 

152 

156 

153 

149

June 16

1.42 

1.60 

1.67 

1.63 

1.66 

1.69

127 

167 

184 

174 

181 

189

Gage 

height Discharge

May 18

1.82 

1.80 

1.81 

2.13 

2.21 

2.20

221 

216 

219 

308 

334 

331

May 24

2.20 

2.11 

2.03 

2.12 

2.19 

2.19

M

1.95 

1.90 

1.88 

1.95 

2.00 

1.99

331 

301 

278 

305 

328 

328

iy30

256 

242 

237 

256 

269 

266

June 5

2.13 

2.08 

2.07 

2.05 

2.02 

1.98

308 

292 

289 

283 

275 

264

June 11

1.51 

1.53 

1.56 

1.53 

1.59 

1.60

146 

151 

158 

151 

165 

167

June 17

2.06 

2.05 

2.00 

1.98 

1.94 

1.89

286 

283 

269 

264 

253 

239

^J Discharge

May 19

2.18 

2.14 

2.09 

2.10 

2.11 

2.17

324 

311 

295 

298 

301 

321

May 25

2.15 

2.08 

2.06 

2.20 

2.34 

2.32

M:

1.95

1.91 

1.89 

1.96 

2.02 

2.01

Ji

1.94 

1.91 

1.88 

1.90 

1.90 

1.88

314 

292 

286 

331 

382 

375

iy31

256 

245 

239 

258 

275 

272

ne6

253 

245 

237 

242 

242 

237

June 12

1.57 

1.53 

1.51 

1.50 

1.49 

1.48

160 

151 

143 

144 

142 

140

June 18

1.85 

1.82 

1.78 

1.75 

1.73 

1.72

229

221 

211 

204 

198 

196

Gage 

height

Ma

2.16 

2.12 

2.10 

2.10 

2.10 

2.09

Discharge

y20

318 

305 

298 

298 

298 

295

May 26

2.22 

2.19 

2.16 

2.28 

2.31 

2.35

338 

328 

318 

360 

371 

386

June 1

2.00 

1.95 

1.92 

2.00 

2.05 

2.03

269 

256 

248 

269 

283 

278

June 7

1.84 

1.81 

1.80 

1.82 

1.83 

1.81

226 

219 

216 

221 

224 

219

June 13

1.47 

1.47

1.45 

'1.42 

1.41 

1.40

138 

138 

134 

127 

125 

123

June 19

1.70 

1.66 

1.64 

1.61 

1.59 

1.58

191 

181 

177 

169 

165 

162

Gage 

height Discharge

May 21

2.08 

2.08 

2.14 

2.48 

2.56 

2.51

292 

292 

311 

438 

473 

451

May 27

2.34 

2.28 

2.28 

2.30 

2.30 

2.26

Ju

2.00 

1.96 

1.93 

2.00 

2.05 

2.02

Ju

1.77 

1.73 

1.71 

1.73 

1.74 

1.71

382 

360 

360 

367 

367 

352

ne2

269 

258 

250 

269 

283 

275

ne8

'208 

198 

194 

198 

201 

194

June 14

1.38 

1.37 

1.36 

1.35 

1.35 

1.-34

120

118 

116 

114 

114 

113

June 20

1.56 

1.54 

1.55 

1.50 

1.49 

1.47

158 

153 

.156 

144 

142 

138

Gage 

height

M:

2.48 

2.48 

2.91 

2.75 

2.71 

2.68

Discharge

iy22

438 

438 

643 

562 

543 

528

May 28

2.22 

2.18 

2.16 

2.14 

2.11 

2.07

338 

324 

318 

311 

301 

289

June 3

1.99 

2.01 

2.15 

2.21 

2.22 

2.35

Jl

1.70 

1.68 

1.66 

1.66 

1.63 

1.61

266 

272 

314 

334 

338 

386

ne9

191 

186 

181 

181 

174 

169

June 15

1.33 

1.32 

1.32 

1.33 

1.42 

1.41

111 

109 

109 

111 

127 

125

June 21

1.46 

1.44 

1.43 

1.42 

1.46 

1.52

136 

131

127 

127 

136 

149
PEND OREILLE RIVER BASIM 119

Skyland Creek near Essex, Mont.

Location.- Lat. 48°17'30", long. 113°23'20", In NW-J- sec. 9, T. 29 N., R. 14 W., 150

feet upstream from mouth and 10 miles northeast of Essex. 

Drainage area.- 8.09 square miles. 

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 284 second-feet 1 p.m. May 22 (gage height, 2.15

1946 to April 1948: Discharge, 189 second-feet May 9, 1947 (gage height, 1.84 

feet). 

Remarks.- Flood flov not affected by storage or diversion.

Mean discharge, in second-feet, 19&8

Day

1

2

3

4

5

6

7

8

9

10

May

14

13

13

13

12

13

15

20

19

17

June

137

142

166

185

162

130

114

104

99

84

July

28

27

26

24

22

22

21

20

20

19

Day

11

12

13

14

15

16

17

18

19

20

May

15

14

15

16

16

19

33

62

83

92

June

77

73

64

56

56

78

131

109

87

75

July

19

17

17

16

16

16

15

15

15

15

Day

21

22

23

24

25

26

27

28

29

30

81

Monthly mean discharge, in second-feet . .. . ............ ................................. ......................

Runoff, in inches ............................................................................................................................

May

11

209

176

140

172

199

197

139

116

120

123

71.5

10.19

June

64

56

49

45

42

38

35

33

31

30

85.1

11.72

July

14

14

13

13

13

13

13

14

14

13

12

17.3

2.47

Gage height, in feet, and discharge, in second-feet, at indicated time, 19^8

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

height | DischarS«

May 17

.92 

.92 

.93 

1.05 

1.17 

1.21

25 

25 

26 

36 

48 

52

May 23

1.92 

1.92 

1..87 

1.85 

1.85 

1.83

Mi

1.71 

1.71 

1.71 

1.72 

1.73 

1.71

JL

2.07 

2.05 

2.12 

2.05 

2.07 

2.05

183 

133 

170 

162 

162 

156

iy29

115 

115 

115 

117 

118 

115

ne4

183 

179 

193 

179 

183 

179

June 10

1.57 

1.54 

1.52 

1.51 

1.50 

1.49

Ju

1.41 

1.51 

1.51 

l.SO 

1.54 

1.62

91 

36 

82 

81 

79 

77

ne!6

65 

81 

81 

79 

86 

99

Gage 

height Discharge

May 18

1.23 

1.23 

1.23 

1.33 

1.45 

1.46

54 

54 

54 

64 

78 

79

May 24

1.77 

1.73 

1.71 

1.78 

1.84 

1.84

M

1.75 

1.73 

1.70 

1.74 

1.76 

1.75

Ju

1.99 

1.94 

1.96 

1.97 

1.94 

1.87

Ju

1.49 

1.49 

1.48 

1.48 

1.49 

1.49

137 

126 

121 

140 

159 

159

iy30

122 

118 

113 

120 

124 

122

ne5

167 

158 

161 

163 

158 

144

nell

77 

77 

76 

76 

77 

77

June 17

1.87 

1.84 

1.82 

1.81 

1.78 

1.75

144 

139 

135 

133 

127 

122

Gage 

height Discharge

May 19

1.48 

1.48 

1.48 

1.49

1.51 

1.56

82 

82 

82 

83 

85 

92

May 25

1.79 

1.77 

1.82 

1.95 

2.00 

1.98

Me

1.74 

1.72 

1.70 

1.77 

1.82 

1.82

142 

137 

152 

200 

220 

212

iy31

120 

117 

113 

126 

135 

135

June 6

1.84 

1.79 

1.77 

1.77 

1.79 

1.75

139 

129 

126 

126 

129 

122

June 12

1.48 

1.47 

1.46 

1.46 

1.45 

1.44

76 

74 

73 

73 

71 

69

June 18

1.73 

1.70 

1.67 

1.66 

1.63 

1.60

 118 

113 

108 

106 

101 

96

Gage 

height Discharge

May 20

1.57 

1.57 

1.56 

1.55 

1.55 

1.55

94 

94 

92 

91 

91 

91

May 26

1.96 

1.90 

1.88 

1.98 

1.98 

1.98

Ju

1.82 

1.78 

1.78 

1.86 

1.91 

1.88

Ju

1.72 

1.69 

1.68 

1.72 

1.71 

1.69

Ju

1.43 

1.42 

1.40 

1.39 

1.39 

1.38

204 

180 

173 

212 

212 

212

ne 1

135 

127 

127 

142 

152 

146

ne 7

117 

111 

110 

117 

115 

111

ne!3

68 

66 

63 

62 

62 

60

June 19

1.58 

1.56 

1.55 

1.53 

1.52 

1.51

93 

89 

88 

84 

82 

81

height I Vi"* **

May 21

1.53 

1.53 

1.56 

1.72 

1.82 

1.87

88 

88 

92 

123 

152 

170

May 27

1.97 

1.97 

1.95 

1.95 

1.89 

1.86

Ju

1.85 

1.84 

1.79 

1.88 

1.92 

1.86

Ju

1.66 

1.65 

1.62 

1.64 

1.66 

1.64

JL

1.36 

1.35 

1.35 

1.34 

1.34 

1.32

Ju

1.50 

1.49 

1.48 

1.47 

1.45 

1.44

208 

208 

200 

200 

176 

166

ne2

140 

139 

129 

146 

154 

142

me 8

106 

104 

99 

103 

106 

103

ne 14

58 

56 

56 

55 

55 

53

ne20

79 

77 

76 

74 

71 

69

Gage 

height Discharge

May 22

1.88 

1.82 

2.03 

2.12 

2.00 

1.99

173 

152 

233 

271 

220 

216

May 28

1.84 

1.81 

1.76 

1.74 

1.74 

1.71

159 

148 

134 

126 

126 

116

June 3

1.85 

1.87 

2.03 

2.09 

2.06 

2.15

Ju

1.62 

1.60 

1.63 

1.63 

1.60 

1.58

140 

144 

175 

187 

181 

199

ne9

99 

96 

101 

101 

96 

93

June 15

1.32 

1.31 

1.31 

1.33 

1.42 

1.41

53 

51 

51 

54 

66 

65

Jyne 21

1.42 

1.40 

1.39 

1.38 

1.40 

1.40

66 

63 

62 

60 

63 

63
120 FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

South Pork Flathead River near Columbia Palls, Mont.

Location.- Lat. 48°22', long. 114°03', in NE£ sec. 17, T. 30 N., R. 19 W., 2 miles upstream from mouth and 9 miles east of Columbia Palls. Datum of gage is 3,031.3 

feet above mean sea level, datum of 1929 (Corps of Engineers bench mark).

Drainage area.- 1,640 square miles.

Page-height record.- Graph based on staff-gage readings and shape of doubtful recorder 

graph except 8 p.m. May 20 to 8 a.m. May 22, 8 a.m. to noon May 25, 12 p.m. May 25 

to noon May 29, noon June 1 to 4 a.m. June 5, for which water-stage recorder graph 

was used.

Discharge record.- Stage-discharge relation defined by current-meter measurements below

~30,700 second-feet and extended to peak stage. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 43,400 se,cond-feet 12 p.m. May 22 (gage height, 

19.60 feet, from floodmark).

1910-16, 1923 to April 1948: Discharge, 46,200 second-feet June 19, 1916 (gage 

height, 16.6 feet, site and datum then in use), irom rating curve extended above 

20,000 second-feet.

Remarks.- No regulation or diversion.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

10,200

8,430

7,390

7.610

7,050

6,980

8,310

10,900

11,100

9,330

June

24,400

25,700

27,100

31,200

27,100

23,900

23,100

23,300

22,800

20,900

July

5,820

5,440

4,930

4,510

4,200

3,920

3,700

3,500

3,240

3,060

Day

11

12

13

14

15

16

17

18

19

20

May

8,390

7,790

8,730

9,910

9,150

8,790

10,600

17,100

24,100

27,600

June

18,700

15,800

14,000

13,000

12,400

11,800

12,500

11,600

10,000

9,010

July

2,890

2,790

2,640

2,540

2,400

2,330

2,240

2,160

2,130

2,380

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet..... .. . ................... .... ...................... ...........

Runoff, in inches ............................. . .......

May

31,800

40,800

38,900

29,700

28,500

30,900

33,100

33,200

28,500

23,800

22,600

18,110

12.68

June

8,720

8,470

8,670

8,790

8,510

7,710

7,160

6,700

6,440

6,260

15,190

10.33

July

2,320

2,110

1,980

1,920

1,840

1,730

1,700

1,890

2,320

2,240

2,090

2,871

2.02

Gage height, in feet, and discharge, in second-feet, at indicated time,

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

8.41 

8.68 

8.92 

9.15 

9.47 

9.92

9,370 

9,930 

10,500 

11,000 

11,700 

12,700

May 23

19.36 

18.95 

18.53 

18.05 

17.62 

17.15

Ms

16.20 

15.95 

15.68 

15.36 

15.04 

14.77

Ju

16.28 

16.58 

16.64 

16.55 

16.35 

16.11

42,400 

40,800 

39,100 

37,200 

35,500 

33,800

iy29

30,500 

29,600 

28,700 

27,600 

26,400 

25,600

ne4

30,800 

31 , 800 

32,000 

31,700 

31,000 

30,200

June 10

13.29 

13.25 

13.22 

13.18 

13.06 

12.95

Ju

9.59 

9.55 

9.53

9.48 

9.46 

9.47

21,200 

21,000 

21,000 

20,800 

20,600 

20,300

ne!6

12,000 

11,900 

11,800 

11,700 

11,700 

11,700

Gage 

height Discharge

May 18

10.60 

11.28 

11.85 

12.30 

12.59 

13.09

14,400 

16,100 

17,500 

18,600 

19,400 

20,600

May 24

16.66 

16.15 

15.77 

15.50 

15.43 

15.46

Ms

14.50 

14.26 

14.09 

13.92 

13.83 

13.78

Ju

15.81 

15.50 

15.17 

14.88 

14.65 

14.50

Ju

12.75 

12.53 

12.34 

12.06 

11.86 

11.69

32,100 

30,300 

29,000 

28,000 

27,800 

27,900

iy30

24,800 

24,100 

23,600 

23,100 

22,800 

22,600

ne 5

29,100 

28,000 

26,900 

25,900 

25,200 

24,800

ne 11

19,800 

19,200 

18,800 

18,000 

17,600 

17,100

June 17

9.59 

9.74 

9.94 

10.09 

9.99 

9.84

12,000 

12,300 

12,800 

13,100 

12,900 

12,500

Gage 

height Discharge

May 19

13.63 

14.15 

14.38 

14.60 

14.71 

14.88

22,200 

23,800 

24,400 

25,100 

25,400 

25,900

May 25

15.55 

15.66 

15.66 

15.60 

15.64 

15.82

28,200 

28,600 

28,600 

28,400 

28,500 

29,200

May 31

13.76 

13.74 

13.70 

13.70 

13.75 

14.00

22,600 

22,500 

22,400 

22,400 

22,600 

23,300

June 6

14.43 

14.33 

14.16 

13.98 

13.85 

13.88

25,600 

24,300 

23,800 

23,200 

22,800 

22,900

June 12

11.51 

11.34 

11.15 

10.97 

10.83 

10.71

16,700 

16,200 

15,800 

15,300 

15,000 

14,700

June 18

9.70 

9.55 

9.39 

9.26 

9.14 

9.02

12,200 

11,900 

11,500 

11,200 

11,000 

10,700

Gage 

height Discharge

May 20

15.05 

15.23 

15.35 

15.47 

15.70 

15.98

26,500 

27,100 

27,500 

27 , 900 

28,800 

29,700

May 26

16.19 

16.43 

16.43 

16.35 

16.33 

16.52

Ju

14.21 

14.42 

14.47 

14.43 

14.45 

14.62

Jl

13.96 

14.02 

13.96 

13.88 

13.87 

13.98

30,500 

31,300 

31,300 

31,000 

31,000 

31,600

ne 1

23,900 

24,600 

24,700 

24,600 

24,600 

25,200

ne 7

23,200 

23,400 

23,200 

22,900 

22,900 

23,200

June 13

10.59 

10.51 

10.45 

10.38 

10.29 

J.0.19

14,400 

14, 200 

14,000 

13,800 

13,600 

13,400

June 19

8.92 

8.81 

8.71 

8.64 

8.55 

8.46

10,500 

10,200 

10,000 

9,840 

9,650 

9,470

Gage 

height Discharge

May 21

16.22 

16.38 

16.45 

16.57 

16.95 

17.58

30,600 

31,100 

31,400 

31,800 

33,100 

35,300

May 27

16.86 

17.10 

17.09 

16.97 

16.92 

17.05

Ju

14.77 

14.89 

14.86 

14.78 

14.76 

14.85

Ju

14.12 

14.18 

14.08 

13.91 

13.83 

13.86

Ju

10.13 

10.12 

10.08 

10.00 

9.92 

9.86

32,800 

33,600 

33,600 

33,200 

33,000 

33,500

ne2

25,600 

26,000 

25,900 

25,600 

25,600 

25,800

ne8

23,700 

23,800 

23,500 

23,000 

22,800 

22,900

ne 14

13,200 

13,200 

13,100 

12,900 

12,700 

12,600

June 20

8.37 

8.30 

8.21 

8.14 

8.09 

8.07

9,290 

9,150 

8,970 

8,830 

8,730 

8,690

Gage 

height Discharge

May 22

18.36 

18.73 

19.10 

19.41 

19.48 

19.60

38,400 

39,900 

41,400 

42,600 

42,900 

43,400

May 28

17.22 

17.22 

17.08 

16.85 

16.61 

16.42

34,100 

34,100 

33,600 

32,800 

31,900 

31,300

JuneS

15.00 

15.14 

15.24 

15.27 

15.41 

15.82

Ju

14.00 

14.00 

13.94 

13.80 

13.63 

13.42

26,300 

26,800 

27,100 

27,200 

27,700 

29,200

ne9

23,300 

23,300 

23,100 

22,700 

22,200 

21,600

June 15

9.83 

9.81 

9.83 

9.77 

9.70 

9.65

12,500 

12,500 

12,500 

12,400 

12,200 

12,100

June 21

8.07 

8.07 

8.12 

8.11 

8.08 

8.06

8,690 

8,690 

8,790 

8,770 

8,710 

8,670

Supplemental record.- May 18, 6 p.m., 12.55 ft., 19,300 sec.-ft.; May 19, 7 a.m., 

14.15 ft., 23,800 sec.-ft.
FEND OREILLE RIVER BASIN 121

Stillwater River near Whitefish, Mont.

Location.- Lat. 48°19', long. 114°23', in SW£ sec. 34, T. 30 X., R. 22 W., 600 feet 

downstream from highway bridge, 7 miles southwest of Whitefish, and 10 miles upstream from Whitefish Creek.

Drainage area.- 529 square .miles.

Gage-height record.- Water-stage recorder graph except noon May 23 to noon May 29, 

May 30, 31, which are based on floodmark, fragmentary gage-height record, and engineer's observations.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

3,640 second-feet, and extended to peak stage. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 4,330 second-feet about 4 p.m. May 26 (gage height, 

20.90 feet, from floodmark).

1930 to April 1948: Discharge, 3,200 second-feet May 12, 1947 (gage height, 17.22 

feet).

Remarks.- Flood runoff not affected by artificial storage.

Mean discharge, in second-feet,

Day

1

2

3

4

5

6

7

8

9

10

May

1,690

1,760

1,810

1,830

1,820

1,790

1,750

1,750

1,790

1,870

June

2,960

2,690

2,460

2,300

2,170

2,080

1,970

1,860

1,740

1,630

July

715

675

637

608

584

558

539

527

515

500

Day

11

12

13

14

15

16

17

18

19

20

May

1,980

2,060

2,080

2,080

2,050

2,020

2,000

1,990

2,010

2,120

June

1,550

1,480

1,410

1,340

1,290

1,220

1,160

1,120

1,080

1,030

July

487

477

466

449

439

431

418

403

393

400

Day

21

22

23

U4

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ....... ........... ..........................................................

Runoff, in inches ............................................................................................................................

May

2,360

2,750

3,330

3,770

4,150

4,320

4,200

3,900

3,640

3,430

3,220

2,494

5.43

June

983

942

914

893

888

873

847

818

786

750

3.04

July

410

410

408

397

380

364

353

366

431

471

473

474

1.03

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

m 

g

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

12.68 

12.66 

12.66 

12.65 

12.64 

12.62

2,000 

2,000 

2,000 

2,000 

2,000 

1,990

May 23

17.05 

17.39 

17.67 

17.93 

18.17 

18.40

Mi

19.17 

19.03 

18.90 

18.82 

18.72 

^S.60

Jl,

14.44 

14.33 

14.23 

14.13 

14.04 

13.96

3,160 

3,260 

3,340 

3,420 

3,490 

3,560

iy29

3,720 

3,670 

3,630 

3,610 

3,580 

3,540

ne 4

2,350 

2,320 

2,300 

2,270 

2,250 

2,230

June 10

11.54 

11.44 

11.35 

11.26 

11.19 

11.12

Ju

9.40 

9.34 

9.29 

9.22

9.18 

9.12

1,670 

1,650 

1,630 

1,610 

1,600 

1,580

ne!6

1,240 

1,230 

1,220 

1,200 

1,200 

1,180

Gage 

height Discharge

May 18

12.62 

12.61 

12.61 

12.60 

12.60 

12.61

1,990 

1,990 

1,990 

1,980 

1,980 

1,990

May 24

18.64 

18.88 

19.12 

19.34 

19.55 

19.75

M

18.48 

18.36 

18.24 

18.13 

18.01 

17.90

Ju

13.88 

13.78 

13.73 

13.67 

13.60 

13.54

3,630 

3,700 

3,780 

3,840 

3,900 

3,960

iy30

3,500 

3,470 

3,430 

3,400 

3,360 

3,330

ne 5

2,210 

2,180 

2,170 

2,160 

2,140 

2,120

June 11

11.06 

11.00 

10.93 

10.87 

10.81 

10.76

1,570 

1,560 

1,550 

1,530 

1,520 

1,510

June 17

9.07 

9.03 

8.98 

8.95 

8.91 

8.88

1,170 

1,170 

1,160 

1,150 

1,140 

1,140

Gage 

height Discharge

May 19

12.62 

12.65 

12.69 

12.74 

12.79 

12.86

1,990 

1,990 

2,010 

2,020 

2,030 

2,050

May 25

19.99 

20.20 

20.42 

20.56 

20.68 

20.77

Mi

17.77 

17.67 

17.53 

17.40 

17.26 

17.12

Ju

13.48 

13.41 

13.35 

13.29 

13.22 

13.15

4,040 

4,100 

4,170 

4,220 

4,260 

4,290

iy31

3,290 

3,260 

3,220 

3,180 

3,140 

3,100

ne 6

2,110 

2,090 

2,080 

2,060 

2,040 

2,030

June 12

10.71 

10.65 

10.59 

10.54 

10.48 

10.42

1,500 

1,490 

1,480 

1,470 

1,460 

1,440

June 18

8.86 

8.84 

8.81 

8.78 

8.74 

8.70

1,130 

1,130 

1,120 

1,120 

1,110 

1,100

Gage 

height Discharge

May 20

12.94 

13.03 

13.15 

13.27 

13.37 

13.53

2,070 

2,090 

2,120 

-2,150 

2,180 

2,220

May 26

20.83 

20.87 

20.88 

20.90 

20.88 

20.83

Ju

16.99 

16.82 

16.68 

16.53 

16.36 

16.21

Ju

13.07 

12.99 

12.90 

12.82 

12.74 

12.65

4,310 

4,320 

4,320 

4,330 

4,320 

4,310

ne 1

3,060 

3,010 

2,960 

2,920 

2,870 

2,820

ne 7

2,010 

1,990 

1,970 

1,950 

1,930 

1,910

June 13

10.37 

10.32 

10.26 

10.19 

10.13 

10.07

1,430 

1,420 

1,410 

1,400 

1,390 

1,370

June 19

8.67 

8.64 

8.60 

8.56 

8.51 

8.46

1,100 

1,090 

1,080 

1,080 

1,070 

1,060

Gage 

height Discharge

May 21

13.70 

13.89 

14.07 

14.28 

14.51 

14.76

2,260 

2, .310 

2,350 

2,400 

2,460 

2,520

May 27

20.78 

20.70 

20.60 

20.47 

20.32 

20.17

4,280 

4,250 

4,220 

4,170 

4,120 

4,060

June 2

16.06 

15.90 

15.76 

15.61 

15.45 

15..27

Ju

12.57 

12.50 

12.44 

12.37 

12.28 

12.19

2,780 

2,730 

2,690 

2,640 

2,600 

2,560

ne8

1,890 

1,880 

1,860 

1,850 

1,820 

1 , 800

June 14

10.00 

9.97 

9.92 

9.87 

9.83 

9.79

1,360 

1,350 

1,340 

1,330 

1,330 

1,320

June 20

3.42 

8.38 

8.32 

8.26 

8.22 

8.17

1,050 

1,040 

1,030 

1,020 

1,020 

1,010

Gage 

height

M:

15.03 

15.34 

15.63 

15.92 

16.27 

16.67

Discharge

iy22

2,590 

2,670 

2,740 

2,820 

2,920 

3,040

May 28

20.01 

19.86 

19.71 

19.57 

19.44 

19.30

4,000 

3,950 

3,900 

3,850 

3,810 

3,760

June 3

15.12 

14.98 

14.88 

14.80 

14.68 

14.56

2,520 

2,480 

2,460 

2,440 

2,410 

2,380

June 9

12.08 

11.98 

11.89 

11.80 

11.70 

11.60

1,780 

1,760 

1,740 

1,720 

1,700 

1,680

June 15

9.75 

9.70 

9.66 

9.60 

9.53 

9.47

1,310 

1,300 

1,290 

1,280 

1,270 

1,250

June 21

8.12 

8.08 

8.05 

7.98 

7.96 

7.93

998 

990 

985 

972 

969 

963
122 FLOODS OF MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

Whlteflsh Creek near Kalispell, Mont.

Location.- Lat. 48°19', long. 114°16', in SWi sec. 34, T. 30 N., R. 21 W., 8 miles north

of Kalispell and 8 miles upstream from mouth. Datum of gage is 2,969.7 feet above

mean sea level, datum of 1929 (Corps of Engineers bench mark). 

Drainage area.- 173 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage

heights used to hundredths. 

Maxima.,- May-June 1948: Discharge, 1,290 second-feet 8 p.m. May 30 (gage height, 4.41

feet).

1928 to April 1948: Discharge, 1,260 second-feet June 3, 1932 (gage height, 4.26

feet). 

Remarks.- Some regulation by Whitefish Lake.

Day

1

2

3

4

5

6

7

8

9

10

May

566

546

538

538

534

534

570

620

628

603

June

1,260

1,240

1,240

1,-240

lj.230

1,210

1,200

1,180

1,150

1,120

July

442

423

400

385

366

351

339

324

309

298

Day

11

12

13

14

15

16

17

18

19

20

May

591

583

583

583

562

558

559

585

616

669

June

1,100

1,080

1,040

1,010

966

915

875

842

792

748

July

284

273

259

248

242

231

217

211

207

220

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ....... .. ........ . . ...............

Runoff, in inches ................................................... ... . . .............................................................

May

726

817

974

1,060

1,080

1,110

1,140

1,180

1,220

1,270

1,280

756

5.04

June

712

676

667

650

628

603

574

542

506

466

915

5.90

July

245

224

207

195

182

173

164

179

217

211

179

265

1.76

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.80 

2.80 

2.82

558 

558 

566

May 23

3.68 

3.82 

3.90

945 

1,010 

1,050

May 29

1.26 

4.29 

4.31

1,220 

1,230 

1,240

June 4

4. 1 31 

4.30 

4.30

Ju

4.06 

4.06 

4.03

Ju

3.64 

3.59 

3.56

1,240 

1,240 

1,240

ne 10

1,120 

1,120 

1,110

ne!6

926 

904 

890

Gage 

height Discharge

May 18

2.86 

2.88 

2.89

583 

591 

595

May 24

3.92 

3.93 

3.93

1,060 

1,060 

1,060

May 30

4.36 

4.40 

4.40

Ju

4.29 

4.27 

4.26

1,270 

1,280 

1,280

ne 5

1,230 

1,220 

1,220

June 11

4.01 

4.00 

3.99

1,100 

1,090 

1,090

June 17

3.54 

3.51 

3.50

881 

868 

863

Gage

height Discharge

May 19

2.92 

2.96 

2.99

607 

624 

637

May 25

3.95 

3.98 

4.00

Mi

4.39 

4.37 

4.36

Ju

4.25 

4.25 

4.24

_ 1,070 

1,080 

1,090

iy31

1,280 

1,270 

1,270

ne6

1,210 

1,210 

1,210

June 12

3.97 

3.95 

3.94

1,080 

1,070 

1,060

June 18

3.47 

3.44 

3.39

850 

836 

814

Gage 

height Discharge

May 20

3.04 

3.D9 

3.13

659 

681 

698

May 26

4.02 

4.04 

4.07

1,100 

1,110 

1,130

June 1

4.34 

4.33 

4.32

1,260 

1,250 

1,250

June 7

4.23 

4.22 

4.21

1,200 

1,200 

1,190

June 13

3.91 

3.87 

3.85

1,050 

1,030 

1,020

June 19

3.36 

3.33 

3.29

800 

786 

769

Gage 

height Discharge

May 21

3.18 

3.21 

3.25

720 

733 

751

May 27

4.09 

4.10 

4.14

1,140 

1,140 

1,160

June 2

4.32 

4.30 

4.30

Ju

4.19 

4.17 

4.16

1,250 

1,240 

1,240

ne8

1,180 

1,170 

1,170

June 14

3.83 

3.80 

3.78

1,010 

1,000 

991

June 20

3.26 

3.23 

3.20

755 

742 

729

Gage

height Discharge

May 22

3.35 

3.44 

3.55

/ 796 

836 

886

May 28

4.17 

4.20 

4.22

1,170 

1,190 

1,200

June 3

4,30 

4.29 

4.31

Ju

4.13 

4.12 

4.08

1,240 

1,230 

1,240

ne9

1,150 

1,150 

1,130

June 15

3.74 

3.71 

3.67

972 

959 

940

June 21

3.17 

3.15 

3.13

716 

707 

698

Supplemental record.- May 30, 1,290 sec.-ft. 

2 p.m., 4.40 ft., 1,280 sec.-ft., 8 p.m., 4.41 ft.,
FEND OREILLE RIVER BASIN 123

Ashley Creek near Kallspell, Mont.

Location. - Lat. 48°10', long. 114°26', In NW£ see. 29, T. 28 N., R. 22 W., 5 miles west 

of Kallspell (revised).

Drainage area.- 203 square miles.

Gage-height record.- Graph drawn on basis of two or more wire-weight gage readings dally 

for period May 17 to June 21. Average of twice-dally readings used May 1-17, June 22 

to July 31, except May 10-13 when no readings were obtained and discharge was estimated. Crest gage height determined from graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used May 8-23. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 749 second-feet 12 p.m. May 27 (gage height, 7.58

1931 to April 1948: Discharge, 365 second-feet May 12, 1947 (gage height, 6.26 

feet). 

Remarks.- Storage In Ashley and Smith Lakes.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

284

292

300

308

306

304

306

340

387

410

June

657

627

608

594

567

533

502

471

441

419

July

188

178

170

162

155

149

144

138

133

128

Day

11

12

13

14

15

16

17

18

19

20

May

425

440

455

468

462

454

452

455

457

476

June

394

385

370

347

327

312

302

293

286

275

July

127

124

119

114

109

104

101

98

98

99

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . .... ...........

Runoff, in inches ............................................................................................................................

May

510

533

562

643

694

714

729

733

719

715

680

464

2.74

June

265

251

242

231

229

22.4

234

227

215

201

368

2.02

July

98

94

90

87

84

8J.

79

80

82

82

81

115

0.65

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

B

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.84 

6.82 

6.84

454 

448 

454

May 23

7.36 

7.14 

7.22

M:

7.52 

7.50 

7.51

J«

7.22 

7.19 

7.16

544 

572 

602

iy29

723 

714 

718

ne4

602 

590 

580

June 10

6.66 

6.64 

6.59

Ju

6.20 

6.19 

6.17

423 

418 

404

ne 16

314 

312 

308

Gage 

height Discharge

May 18

6.84 

6.86 

6.86

M:

7.30 

7.37 

7.40

M

7.52 

7.50 

7.47

Ju

7.14 

7.11 

7.08

454 

456 

456

iy24

632 

660 

672

ay 30

723 

714 

701

ne5

572 

562 

551

June 11

6.55 

6.54 

6.53

394 

392 

390

June 17

6.15 

6.13 

6.11

304 

300 

296

Gage 

height Discharge

May 19

6.86 

6.87 

6.87

Me

7.44 

7.47 

7.49

M:

7.42 

7.41 

7.39

Ji

7.04 

7.01 

6.98

456 

459 

459

iy25

689 

701 

710

iy31

680 

676 

668

ne6

538 

527 

518

June 12

6.52 

6.51 

6.49

387 

384 

380

June 18

6.10 

6.09 

6.08

294 

292 

290

Gage 

height Discharge

May 20

6.88 

6.99 

7.04

462 

486 

498

May 26

7.50 

7.50 

7.51

Ju

7.38 

7.35 

7.32

Ju

6.95 

6.91 

6.88

714 

714 

718

ne 1

664 

652 

640

ne7

508 

495 

486

June 13

6.47 

6.43 

6.40

375 

365 

358

June 19

6.07 

6.05 

6.03

288 

284 

281

Gage 

height Discharge

May 21

7.09 

7.12 

7.16

508 

514 

521

May 27

7.52 

7.54 

7.58

723 

732 

749

June 2

7.30 

7.28 

7.25

Ju

6.85 

6.81 

6.78

Ju

6.37 

6.33 

6.31

632 

624 

613

ne8

477 

465 

456

ne 14

351 

342 

357

June 20

6.02 

5.99 

5.97

279 

273 

269

Gage 

height Discharge

May 22

7.22 

7.26 

7.29

531 

538 

541

May 28

7.55 

7.53 

7.52

Ju

7.24 

7.24 

7.22

Ji

6.74 

6.71 

6.68

736 

727 

723

ne3

609 

609 

602

ne9

445 

437 

429

June 15

6.30 

6.24 

6.20

335 

322 

314

June 21

5.96 

5.94 

5.92

267 

264 

260

824933 O - 49 - 10
124 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Swan River near Big Pork, Mont.

Location.- Lat. 48°01', long. 113°59', in NW£ sec. 14, T. 26 N., R. 19 W., at outlet ,of 

Swan Lake, 7 miles southeast of Big Pork.

Drainage area.- 647 square miles.

Gage-height "record.- Water-stage recorder graph except for periods noon May 23 to 8 a.m. 

May 25 and 11 p.m. May 26 to 6 p.m. May 27, when gage heights were estimated or obtained from graph through observer's readings. Peak stage determined from floodmark.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

6,500 second-feet and extended to peak stage. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 8,400 second-feet 8 a.m. to 4 p.m. May 24 (gage 

height, 7.12 feet, from floodmark).

1922 to April 1948: Discharge, 8,280 second-feet June 18, 1933 (gage height, 7.00 

feet).

Remarks.- No diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,870

2,920

2,870

2,740

2,720

2,620

2,610

2,790

3,290

3,780

June

6,510

6,300

6,410

6,780

7,100

6,970

6,580

6,340

6,280

6,400

July

2,610

2,540

2,460

2,340

2,240

2,080

1,970

1,900

1,800

1,760

Day

11

12

13

14

15

16

17

18

19

20

May

3,780

3,530

3,260

3,170

3,160

3,060

2,920

2,980

3,400

4,010

June

6,490

5,250

5,750

5,240

4,820

4,480

4,230

4,110

3,910

3,650

July

1,650

1,560

1,480

1,430

1,380

1,320

1,290

1,230

1,200

1,230

Day

21^

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... ..... .......... ........................................................

Runoff, in inches ............................................................................................................................

May

5,000

6,340

7,760

8,350

7,660

7,070

6,980

7,160

7,440

7,390

7,000

4,536

8.08

June

3,320

3,240

3,260

3,280

3,220

3,120

3,000

2,870

2,730

2,660

4,843

8.36

July

1,260

1,240

1,200

1,190

1,130

1,090

1,050

1,090

1,170

1,170

1,170

1,556

2.77

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

§

EC

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.50 

4.48 

4.45 

4.44 

4.45 

4.46

2,980 

2,950 

2,900 

2,880 

2,900 

2,920

May 23

6.68 

6.79 

6.87 

6.94 

7.00 

7.05

7,380 

7,640 

7,820 

7,980 

8,120 

8,240

May 29

6.68 

6.69 

6.70 

6.72 

6.74 

6.74

7,380 

7,410 

7,430 

7,480 

7,520 

7,520

June 4

6.34 

6.38 

6.41 

6.46 

6.49 

6.51

6,620 

6,710 

6,770 

6,880 

6,950 

6,990

June 10

6.22 

6.23 

6.25 

6.25 

6.26 

6.26

6,350 

6,380 

6,420 

6,420 

6,440 

6,440

June 16

5.37 

5.33 

5.30 

5.29 

5.28 

5. 25

4,590 

4,510 

4,450 

4,430 

4,410 

4,370

Gage 

height Discharge

May 18

4.47 

'4.47 

4.48 

4.50 

4.55 

4.59

2,930 

2,930 

2,950 

2, .980 

3,060 

3,110

May 24

7.10 

7.12 

7.12 

7.12 

7.10 

7.04

M;

6.73 

6.72 

6.70 

6.67 

6.62 

6.58

8,350 

8,400 

8,400 

8,400 

8,350 

8.210

»y30

7,500 

7,480 

7,430 

7,360 

7,250 

7,150

June 5

6.54 

6.56 

6.56 

6.56 

6.57 

6.57

Ju

6.26 

6.33 

6.27 

6.28 

6.29 

6.26

7,060 

7,110 

7,110 

7,110 

7,130 

_ 7,130

nell

6,440 

6,600 

6,460 

6,490 

6,510 

6,440

June 17

5.24 

5.21 

5.18 

5.16 

5.15 

5.14

4,330 

4,270 

4,210 

4,170 

4,150 

4,130

Gage 

height Discharge

May 19

4.65 

4.70 

4.74 

4.79 

4.86 

4.91

3,220 

3,310 

3,380 

3,470 

3,600 

3,690

May 25

6.94 

6.85 

6.78 

6.71 

6.67 

6.64

M;

5.59 

6.57 

6.54 

6.47 

6.42 

6.39

7,980 

7,800 

7,610 

7,450 

7,360 

7.290

»y31

7,180 

7,130 

7,060 

6,900 

6,790 

6,730

June 6

6.57 

6.54 

6.49 

6.46 

6.44 

6.43

7,130 

7,060 

6,950 

6,880 

6,840 

6,820

June 12

6.24 

6.22 

6.18 

6.13 

6.10 

6.07

6,400 

6,350 

6,270 

6,160 

6,090 

6,030

June 18

5.15 

5.15 

5.13 

5.12 

5.11 

5.09

4,150 

4,150 

4,110 

4,090 

4,070 

4,030

Gage 

height Discharge

May 20

4.95 

5.01 

5.07 

5.12 

5.20 

5.30

3,760 

3,880 

3,990 

4,090 

4,250 

4,450

May 26

6.63 

6.62 

6.49 

5.47 

6.48 

6.51

Ju

6.36 

6.33 

6.30 

6.24 

6.22 

6.20

Ju

6.42 

6.36 

6.30 

6.27 

6.25 

6.26

7,270 

7,250 

6,950 

6,900 

6,930 

6.990

ne 1

6,660 

6,600 

6,530 

6,400 

6,350 

6,310

ne 7

6,790 

6,660 

6,530 

6,460 

6,420 

6,440

June 13

6.03 

5.99 

5.93 

5.89 

5.85 

5.82

5,940 

5,860 

5,730 

5,650 

5,560 

5,500

June 19

5.07 

5.05 

5.02 

5.01 

4.98 

4.97

3,990 

3,960 

3,900 

3,880 

3,820 

3,800

hefg^t | D"d«*»

May 21

5.37 

5.46 

5.57 

5.66 

5.77 

5.92

4,590 

4,770 

4,990 

5,170 

5,400 

5,710

May 27

6.51 

6.51 

6.51 

6.50 

6.49 

6.49

Ju

6.20 

6.20 

6.18 

6.17 

6.20 

6.22

Ju

6.27 

6.25 

6.18 

6.18 

6.17 

6.18

6,990 

6,990 

6,990 

6,970 

6,950 

6.950

ne2

6,310 

6,310 

6,270 

6,240 

6,310 

6,350

ne8

6,460 

6,420 

6,270 

6,270 

6,240 

6,270

June 14

5.79 

5.74 

5.68 

5.64 

5.61 

5.59

5,440 

5,330 

5,210 

5,130 

5,070 

5,030

June 20

4.95 

4.94 

4.91 

4.85 

4.81 

4.76

3,760 

3,750 

3,690 

3,580 

3,510 

3,420

Gage 

height Discharge

May 22

6.06 

6.09 

6.18 

6.30 

6.41 

5.54

6,010 

6,070 

6,270 

6,530 

6,770 

7,060

May 28

6.53 

6.53 

6.56 

6.62 

6.67 

6.68

7,040 

7,040 

7,110 

7,250 

7,360 

7.380

June 3

6.22 

6.20 

6.23 

6.27 

6.28 

6.31

Ju

5.18 

6.19 

6.19 

6.17 

6.19 

6.23

6,350 

6,310 

6,380 

6,460 

6,490 

6,550

ne9

6,270 

6,290 

6,290 

6,240 

6,290 

6,380

June 15

5.55 

5.52 

5.49 

5.44 

5.41 

5.40

4,950 

4,890 

4,830 

4,730 

4,670 

4,650

June 21

4.75 

4.72 

4.69 

4.68 

4.67 

4.67

3,400 

3,350 

3,290 

3,280 

3,260 

3,260
PEMD ORETTiT.K RIVER BASIN 125

Priest Lake at outlet, near Coolln, Idaho

Location.- Lat. 48°29'30", long. 116°53'00", In SE£ seo. 5, T. 59 N., R. 4 W., half a 

mile east of outlet and l£ miles northwest of Coolln. Datum of gage Is 2,435.06 

feet (Coast and Geodetic Survey datum) or 2,437.99 feet (Geological Survey datum) 

above mean sea level.

Daalnage area.- 572 square miles.

Gage-height record.- Water-stage recorder graph except for periods May 1-28, July 12-24. 

Staff gage was read May 5, 10, 17, 25, July 13, 18, 20.

Maxima.- May-June 1948: Gage height, 6.46 feet 4 p.m. May 29 to 5 a.m. May 30. 

T928 to April 1948: Gage height observed, 5.94 feet May 23, 1932.

Mean gage height, In feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

3.50

3.73

June

6.19

6.10

6.02

5.96

5.87

5.77

5.65

5.55

5.45

5.38

July

2.97

2.86

2.76

2.66

2.59

2.54

2.50

2.45

2.39

2.33

Day

11

12

13

14

. 15

16

17

18

19

20

May

4.00

June

5.28

5.18

5.02

4.84

4.65

4.50

4.39

4.27

4.11

3.94

July

2.26

2.08

1.80

1.82

Day

21

22

23

24

25

26

27

28

29

30

31

May

5.78

6.45

6.43

6.32

June

3.82

3.71

3.63

3.62

3.56

3.4.9

3.40

3.30

3.20

3.08

July

1.67

1.63

1.58

1.62

1.62

1.60

1.57
126 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Priest River at outlet of Priest Lake, near Coolin, Idaho

Location.- Lat. 48°29', long.'116°54', in SW£ sec. 5, T. 59 N., R. 4 W., at southwest 

end of Priest Lake, 2 miles northwest of Coolin. Datum of gage is 2,435.06 feet 

(Coast and Geodetic Survey datum) or 2,437.99 feet (Geological Survey datum) above 

mean sea level.

Drainage area.- 572 square miles.

Gage-height "record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used May 1-12, July 21-31.

Maxima.- May-June 1948: Discharge, 8,560 second-feet 4 p.m. to 10 p.m. May 29 (gage 

height, 5.53 feet).

1911 to April 1948: Discharge, 7,290 second-feet May 30, 1917 (gage height, 6.83 

feet).

Remarks.- No diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,980

2,960

2,950

3,000

2,950

2,980

3,060

3,150

3,230

3,320

June

8,040

7,840

7,700

7,580

7,460

7,320

7,090

6,900

6,740

6,630

July

2,840

2,700

2,540

2,400

2,330

2,290

2,240

2,190

2,110

2,030

Day

11

12

13

14

15

16

17

18

19

20

May

3,400

3,830

' 4,110

4,220

4,280

4,330

4,410

4,560

4,730

5,080

June

6,460

6,300

6,010

5,700

5,380

5,140

4,970

4,750

4,490

4,230

July

1,930

1,850

1,780

1,710

1,640

1,590

1,530

1,460

1,000

1,000

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................... ........................ .. ...............................................................

May

5,620

6,180

6,760

7,120

7,290

7,510

7,840

8,250

8,500

8,480

8,270

5,011

10.10

June

4,060

3,930

3,790

3,790

3,720

3,630

3,480

3,340

3,180

3,010

5,422

10.58

July

1,210

1,280

1,230

1,180

1,130

1,110

1,080

1,110

1,100

1,080

1,070

1,669

3.36

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

IH

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.07 

3.09 

3.10 

3.11 

3.13 

3.15

4,360 

4,390 

4,410 

4,430 

4,460 

4,490

May 23

4.41 

4.46 

4.51 

4.55 

4.59 

4.63

Mi

5.46 

5.48 

5.50 

5.53 

5.53 

5.52

Ju

5.01 

5.00 

4.98 

4.97 

4.96. 

4.95

6,600 

6,680 

6,770 

6,840 

6,900 

6,970

iy29

8,440 

8,470 

8,510 

8,560 

8,560 

8,550

ne4

7,630 

7,610 

7,570 

7,560 

7,540 

7,520

June 10

4.46 

4.44 

4.44 

4.42 

4.39 

4.36

Ju

3.60 

3.56 

3.54 

3.52 

3.53 

3.51

6,680 

6,650 

6,650 

6,610 

6,560 

6,510

ne 16

5,220 

5,150 

5,120 

5,080 

5,100 

5,070

Gage 

height Discharge

May 18

3.17 

3.19 

3.20 

3.21 

3.22 

3.23

4,520 

4,550 

4,570 

4,590 

4,600 

4,620

May 24

4.67 

4.70 

4.71 

4.74 

4.76 

4.78

M.

5.51 

5.50 

5.49 

5.48 

5.45 

5.43

Ju

4.94 

4.93 

4.93 

4.91 

4.89 

4.88

Ju

4.36 

4.34 

4.32 

4.31 

4.31 

4.29

7,040 

7,090 

7,110 

7,160 

7,190 

7,230

iy30

8,530 

8,510 

8,490 

8,470 

8,420 

8,380

ne 5

7,500 

7,480 

7,480 

7,450 

7,410 

7,400

nell

6,510 

6,480 

6,440 

6,430 

6,430 

6,390

June 17

3.48 

3.47 

3.46 

3.44 

3.41 

3.38

5,020 

5,000 

4,990 

4,950 

4,910 

4,860

Gage 

height Discharge

May 19

3.25 

3.28 

3.30 

3.32 

3.35 

3.38

4,650 

4,700 

4,730 

4,760 

4,810 

4,860

May 25

4.79 

4.80 

4.81 

4.83 

4.85 

4.87

Ml

5.41 

5.38 

5.36 

5.35 

5.32 

5.30

7,240 

7,260 

7,280 

7,310 

7,340 

7,380

iy31

8,350 

8,290 

8,260 

8,240 

8,190 

8,150

June 6

4.87 

4.85 

4.84 

4.82 

4.80 

4.79

7,380 

7,340 

7,330 

7,290 

7,260 

7,240

June 12

4.28 

4.26 

4.24 

4.22 

4.19 

4.16

6,380 

6,340 

6,310 

6,270 

6,220 

6,170

^ June 18

3.36 

3.34 

3.32 

3.29 

3.25 

3.23

4,830 

4,790 

4,760 

4,710 

4,650 

4,620

Gage 

height

ME

3.42 

3.47 

3.51 

3.56 

3.61 

3.66

Discharge

iy20

4,920 

5,000 

5,070 

5,150 

5,240 

5,320

May 26

4.90 

4.93 

4.95 

4.96 

4.98 

5.03

7,430 

7,480 

7,520 

7,540 

7,570 

7,660

June 1

5.27 

5.26 

5.24 

5.22 

5.21 

5.19

Jl

4.73 

4.71 

4.69 

4.68 

4.66 

4.64

8,100 

8,080 

8,040 

8,010 

7,990 

7,950

ne7

7,140 

7,110 

7,070 

7,060 

7,020 

6,990

June 13

4.13 

4.10 

4.06 

4.03 

4.00 

3.97

6,120 

6,070 

6,000 

5,950 

5,900 

5,850

June-19

3.20 

3.18 

3.15 

3.12 

3.10 

3.07

4,570 

4,540 

4,490 

4,440 

4,410 

4,360

Gage 

height

Ml

3.72 

3.79 

3.84 

3.89 

3.95 

4.00

Discharge

iy21

5,420 

5,540 

5,630 

5,710 

5,820 

5,900

May 27

5.04 

5.09 

5.13 

5.17 

5.21 

5.25

7,680 

7,770 

7,840 

7,920 

7,990 

8,060

June 2

5.17 

5.15 

5.13 

5.11 

5.09 

5.08

Ju

4.63 

4.61 

4.59 

4.56 

4.54 

4.53

7,920 

7,880 

7,840 

7,810 

7,770 

7,750

ne8

6,970 

6,940 

6,900 

6,850 

6,820 

6,800

June 14

3.94 

3.91 

3.88 

3.85 

3.82 

3.79

5,800 

5,750 

5,700 

5,640 

5,590 

5,540

June 20

3.04 

3.01 

2.98 

2.96 

2.94 

2.91

4,310 

4,270 

4,220 

4,190 

4,150 

4,110

Gage 

height

M.

4.04 

4.08 

4.19 

4.23 

4.28 

4.36

Discharge

iy22

5,970 

6,040 

6,220 

6,290 

6,380 

6,510

May 28

5.29 

5.33 

5.37 

5.39 

5.42 

5.44

Ju

5.07 

5.06 

5.05 

5.04 

5.03 

5.02

Ju

4.52 

4.50 

4.48 

4.47 

4.48 

4.47

8,130 

8,200 

8,280 

8,310 

8,370 

8,400

ne3

7,740 

7,720 

7,700 

7,680 

7,660 

7,650

ne9

6,780 

6,750 

6,720 

6,700 

6,720 

6,700

June 15

3.76 

3.73 

3.70 

3.66 

3.63 

3.61

5,490 

5,440 

5,390 

5,320 

5,270 

5,240

June 21

2.89 

2.88 

2.86 

2.89 

2.88 

2.86

4,070 

4,060 

4,030 

4,070 

4,060 

4,030
PEHD OREILLE RIVER BASIN 127

Priest River near Priest River, Idaho

Location.- Lat. 48°13', long. 116°55', in NE^SE-^ sec. 11, T. 56 N., R. 5 W., 500 feet ' 

downstream from Saddler Creek, a quarter of a mile downstream from Lower West Branch, 

2j miles north of Priest River, and 3^ miles upstream from mouth.

Drainage area.- 902 square miles.

Gage-height Tecord.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 10,500 second-feet 10 a.m. May 29 to 10 a.m. May 30; 

gage height, 8.97 feet 10 p.m. May 29.

1903-5, 1910-11, 1923, 1929 to April 1948: Discharge, 8,890 second-feet May 23, 

1932 (gage height, 8.03 feet).

Remarks.- No diversion above station. Some regulation on tributary.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

4,570

4,500

4,540

5,020

4,870

4,720

5,080

5,470

5,530

5,500

June

9,680

9,440

9,300

9,360

9,160

8,810

8,530

8,250

8,060

7,970

July

3,600

3,430

3,300

3,140

3,160

3,090

2,830

2,800

2,650

2,540

Day

11

12

13

14

15

16

17

18

19

20

May

5,800

5,770

6,720

6,900

6,660

6,430

6,410

6,510

6,590

6,940

June

7,780

7,680

7,270

6,840

6,520

6,510

6,640

6,130

5,700

5,390

July

2,440

2,330

2,240

2,170

2,110

2,060

1,980

1,910

1,910

1,170

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .......................... . ............ .. .. . .... .....................

Runoff, in inches ............................................................................................................................

May

7,550

8,210

9,060

9,400

9,480

9,630

9,860

10,200

10,400

10,400

10,100

7,059

9.02

June

5,190

4,940

4,710

4,660

4,610

4,310

4,160

3,960

3,800

3,700

6,635

8.21

July

1,480

1,580

1,590

1,540

1,510

1,460

1,460

1,550

1,550

1,490

1,440

2,178

2.78

Gage height, infect, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.49 

6.51 

6.56

6,380 

6,420 

6,500

May 23

8.06 

8.18 

8.25

Mi

8.89 

8.94 

8.94

9,000 

9,210 

9,320

iy29

10,400 

10,500 

10,500

June 4

8.30 

8.28 

8.24

9,410 

9,380 

9,310

June 10

7.49 

7.40 

7.36

8,030 

7,880 

7,810

June 16

6.55

6.50 

6.53 

6.66 

6.71

6,480

6,400 

6,450 

6,660

6,740

Gage 

height Discharge

May 18

6.57 

6.57 

6.59

6,510 

6,510 

, 6,540

May 24

8.31 

8.32

9,430 

9,440

May 30

8.93 

8.88 

8.81

Ju

8.18 

8.14 

8.04

10,500 

10,400 

10,300

ne 5

9,210 

9,140 

8,970

June 11

7.35 

7.32 

7.32

7.35

7,800 

7,740 

7,740

7,800

June 17

6.72

6.68 

6.64

6.50

6,750

6,690 

6,620

6,400

Gage 

height Discharge

May 19

6.60 

6.62 

6.70

6,560 

6,590 

6,720

May 25

8.34 

8.37

Mi

8.76 

8.67 

8.56

9,480 

9,530

iy3l

10,200 

10,000 

9,850

June 6

7.98 

7.91 

7.86

8,870 

8,750 

8,660

June 12

7.35 

7.28

7.18

7,800 

7,680

7,510

June 18

6.45 

6.32

6.18

6,320 

6,110

5,890

Gage 

height Discharge

May 20

6.76 

6.89 

7.03

6,820 

7,020 

7,250

May 26

8.44 

8.46

Ju

8.49 

8.42 

8.39

9,650 

9,680

ne 1

9,730 

9,610 

9,560

June 7

7.81 

7.75 

7.>:t

8,580 

8,480 

8,410

June 13

7.03 

6.99

6.91

7,250 

7,180

7,060

June 19

6.04

5.98 

5.94

5,680

5,590 

5,530

Gage 

height Discharge

May 21

7.15 

7.27 

7.37

7,460 

7,660 

7,830

May 27

8.58 

8.63

9,890 

9,970

June 2

8.35 

8.29 

8.25

Ju

7.67 

7.64 

7.57

7.50

Ju

6.77 

6.64

9,500 

9,390 

9,320

ne8

8,340 

8,290 

8,170

8,050

ne 14

6,830 

6,620

June 20

5.90

5.85 

5.82

5.76

5,470

5,400 

5,350

5,260

Gage 

height Discharge

May 22

7.47 

7.60 

7.72 

7.75 

7.83

8,000 

8,220 

8,420 

8,480 

8,610

May 28

8.76 

8.79 

8.86

10,200 

10,200 

10,400

June 3

8.24 

8.22 

8.23

Ju

7.46 

7.44 

7.57 

7.54 

7.57

9,310 

9,270 

9,290

ne9

7,980 

7,950 

8,170 

8,120 

8,170

June 15

6.52 

6.54 

6.64 

6.60

6,430 

6,460 

6,620 

6,560

June 21

5.70 

5.72 

5.70 

5.65

5,170 

5,200 

5,170 

5,100

Supplemental record.- May 29, 

.46 ft.", 7,980 sec.-ft.; June

10.p.m., 8.97 

15, 2:30 p.m.,

ft., 10,500 sec.-ft.; June 9, 3 p.m., 

6.51 ft., 6,420 sec.-ft.
128 FLOODS OF MAY-JDME 1948 IN COLUMBIA RIVER BASIN

Kettle River Basin

* Kettle River near Ferry, Wash, 

(international gaging station)

Location.- Lat. 48°58'40", long. 118°46'10", In lot 7, sec. 10, T. 40 N., R. 32 E., l£ 

miles south of International boundary and Ferry and 3 miles upstream from Toroda 

Creek. Datum of gage Is 1,840.00 feet above mean sea level (subject to correction to 

datum of 1929).

Drainage area.- 2,220 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

16,700 second-feet and extended to peak stage on basis of conveyance-slope studies, 

area-velocity studies, and logarithmic plotting. Gage heights used to hundredths 

May 17 to June 21; half-tenths between 11.3 and 13.5 feet; hundredths below and 

tenths above these limits May 1-16 and June 22 to July 31.

Maxima.- May-June 1948: Discharge, 21,200 second-feet 4 a.m. May 29 (gage height,

 2TTT5 feet).

1928 to April 1948: Discharge, 18,200 second-feet May 27, 1942 (gage height, 

20.54 feet).

Remarks.- Several small diversions above station for Irrigation which are probably a 

very small percentage of flood discharge. This station Is one of the International 

gaging stations maintained by the United States under agreement with Canada. Records 

provisional, subject to revision.

Mean discharge, in second-feet, 19Jf8

Day

1

2

3

4

5

6

7

8

9

10

May

5,490

4,790

4,460

4,790

4,620

4,790

6,230

6,420

6,420

6,420

June

12,300

11,700

11,600

11,500

11,300

11,300

11,500

11,500

11,100

11,100

July

2,490

2,260

2,090

1,920

1,820

1,870

1,920

1,920

1,980

1,760

Day

11

12

13

14

15

16

17

18

19

?!0

May

6,420

7,000

8,010

8,430

7,800

7,400

8,170

9,450

9,450

9,420

June

13,900

11,200

9,520

8,160

7,450

7,590

8,440

7,980

6,840

6,110

July

1,610

1,710

1,820

1,610

1,460

1,360

1,320

1,220

1,220

1,320

Day

21

22

23

24

26

26

27

28

29

80

31

Monthly mean discharge, in second-feet . ... . .... ........ . . .. ..... ...........

Runoff, in inches ... . ........ . - .... ........... ..... .......................

May

11,300

13,700

14,200

15,800

16,500

15,900

17,100

19,300

20,300

17,900

13,900

5.22

June

6,080

6,610

5,670

4,960

4,460

4,000

3,640

3,300

3,040

2,730

4.13

July

1,320

1,170

1,060

1,020

1,040

984

928

1,060

1,510

1,320

1,150

0.79

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

,4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

15.67 

15.80 

1*99 

rfTl4 

16.26 

16.37

Mz

18.66 

18.58 

18.49 

18.47 

18.54 

18.69

Mi

21.15 

21.02 

20.79 

20.60 

20.60 

20.68

Ju

17.57 

17.39 

17.41 

17.49 

17.51 

17.41

7,540 

7,800 

8,200 

8,510 

8,770 

9,000

iy23

14,400 

14,200 

14,000 

13,900 

14,100 

14,500

iy29

21,200 

20,800 

20,200 

19,600 

19,600 

19,900

ne 4

11,700 

11,300 

11,400 

11,500 

11,600 

11,400

June 10

17.03 

16.91 

17.19 

17.49 

17.68 

17.83

10,500 

10,200 

10,800 

11,500 

12,000 

12,400

June 16

15.42 

15.44 

15.64 

15.87 

16.01 

16.05

7,040 

7,080 

7,480 

7,950 

8,240 

8,320

Gage 

height Discharge

May 18 .

16.45 

16.52 

16.60 

16.67 

16.68 

16.67

9,180 

9,330 

9,510 

9,660 

9,690 

9,660

May 24

18.87 

19.02 

19.19 

19.38 

19.56 

19.65

15,000 

15,400 

15,800 

16,300 

16,800 

17,000

May 30

20.64 

20.40 

20.05 

19.55 

19.28 

19.03

Ju

17.29 

17.23 

17.33 

17.46 

17.48 

17.46

19,700 

19,100 

18,100 

16,800 

16,000 

15,400

ne 5

11,100 

10,900 

11,200 

11,500 

11,500 

11,500

June 11

18.14 

18.45 

18.69 

18.76 

18.69 

18.10

13,100 

13,900 

14,500 

14,700 

14,500 

13,000

June 17

16.10 

16.13 

16.18 

16.15 

16.05 

15.98

8,430 

8,490 

8,600 

8,540 

8,320 

8,180

Gage 

height Discharge

May 19

16.65 

16.63 

16.59 

16.55 

16.48 

16.40

9,620 

9,580 

9,490 

9,400 

9,250 

9,070

May 25

19.68 

19.60 

19.49 

19.33 

19.23 

19.20

ME

18.80 

18.55 

18.38 

18.29 

18.23 

18.12

17,100 

16,900 

16,600 

16,200 

15,900 

15,800

iy3l

14,800 

14,100 

13,700 

13,500 

13,300 

13,100

June 6

17.19 

17.13 

17.31 

17.52 

17.60 

17.52

10,800 

10,700 

11,100 

11,600 

11,800 

11,600

June 12

17.61 

17.38 

17.27 

17.20 

17.14 

16.98

11,800 

11,300 

11,000 

10,900 

10,700 

10,400

June 18

15.89 

15.82 

15.89 

15.98 

15.90 

15.68

7,990 

7,840 

7,990 

8,180 

8,010 

7,560

Gage 

height Discharge

May 20

16.40 

16.41 

16.50 

16.66 

16.75 

16.87

9,070 

9,090 

9,290 

9,640 

9,840 

10,100

May 26

19.22 

19.14 

19.10 

19.14 

19.30 

19.47

15,900 

15,700 

15,600 

15,700 

16,100 

16,500

June 1

17.92 

17.71 

17.65 

17.81 

17.78 

17.66

12,600 

12,100 

11,900 

12,300 

12,200 

12,000

June 7

17.30 

17.19 

17.38 

17.62 

17.73 

17.69

11,100 

10,800 

11,300 

11,900 

12,100 

12,000

June 13

16.76 

16.65 

16.65 

16.59 

16.39 

16.19

9,860 

9,620 

9,620 

9,490 

9,050 

8,620

June 19

15.49 

15.35 

15.29 

15.24 

15.15 

15.05

7,180 

6,900 

6,780 

6,690 

6,520 

6,320

Gage 

height Discharge

May 21

17.04 

17.20 

17.38 

17.59 

17.76 

17.91

10,500 

10,900 

11,300 

11,800 

12,200 

12,600

May 27

19.63 

19.68 

19.63 

19.61 

19.80 

20.12

17,000 

17,100 

17,000 

16,900 

17,400 

18,300

June 2

17.53 

17.45 

17.53 

17.62 

17.65 

17.58

Ju

17.50 

17.29 

17.36 

17.54 

17.60 

17.47

11,600 

11,400 

11,600 

11,900 

11,900 

11,800

ne8

11,600 

11,100 

11,200 

11,700 

11,800 

11,500

June 14

16.05 

15.96 

15.99 

15.99 

15.87 

15.73

8,320 

8,140 

8,200 

8,200 

7,950 

7,660

June 20

14.95 

14.89 

14.95 

15.00 

14.90 

14.83

6,140 

6,020 

6,140 

6,230 

6,040 

5,910

Gage 

height

M

18.14 

18.29 

18.39 

18.52 

18.61 

18.67

Discharge

iy22

13,100 

13,500 

13,700 

14,100 

14,300 

14,500

May 28

20.33 

20.40 

20.40 

20.50 

20.71 

21.00

18,900 

19,100 

19,100 

19,400 

19,900 

20,800

June 3

17.41 

17.34 

17.45 

17.62 

17.73 

17.70

Jc

17.24 

17.08 

17.22 

17.44 

17.43 

17.27

11,400 

11,200 

11,400 

11,900 

12,100 

12,000

ne9

11,000 

10,600 

10,900 

11,400 

11,400 

11,000

June 15

15.62 

15.58 

15.65 

15.68 

15.60 

15.51

7,440 

7,360 

7,500 

7,560 

7,400 

7,220

June 21

14.80. 

14.80 

14.87 

15.00 

15.07 

15.13

5,850 

5,850 

5,980 

6,230 

6,360 

6,480
KETTLE RIVER BASIN

Kettle River near Laurier, Wash, 

(international gaging station)

Location.- Lat. 48°50'50", long. 118°13'00", in Sw£ sec. 11, T. 40 N., R. 36 E., 500

feet downstream from Deep Creek, if miles southeast of Laurier, and 12 miles upstream from Boulder Creek. 

Drainage area.- 3,800 square miles. 

Gage-height "record_- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

28,000 second-feet and extended to peak stage on basis of slope-area measurement.

Gage heights used to hundredths May 17 to June El; half-tenths below and tenths above

6.Q feet May 1-16, June El' to July 31. 

Maxima.- May-June 1948.: Discharge, 35,000 second-feet 11 p.m. May 29 (gage height,

17.25 feet), by slope-area method.

1929 to April 1948: Discharge, 27,400 second-feet May 28, 1942 (gage height,

15.73 feet).

Maximum stage known, about 22 feet sometime in May or June 1894, from information

by local residents. 

Remarks.- North Pork regulated by reservoir at Grand Forks, British Columbia. Numerous

small diversions for irrigation and domestic supply are probably a small percentage

of flood discharge.

This is an international gaging station maintained by the United States under

agreement with Canada. Records provisional, subject to revision.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

117300

10,100

9,170

9,650

9,630

9,400

11,100

12,600

12,600

12,600

June

22,400

21,200

21,000

21,000

20,500

20,300

20,400

20,600

19,600

19,200

July

4,810

4,460

4,040

3,720

3,490

3,490

3,490

3,490

3,490

3,260

Monthly mean discharge, in second-fee 

Runoff, in inches .......................................

Day

11

12

13

14

15

16

17

18

19

20

May

12,600

13,100

14,100

15,500

14,700

13,600

14,100

16,400

16,700

16,500

June 

22,200

20,800

17,300

14,900

13,500

13,100

14,300

13,800

12,600

11,300

July

3,050

2,910

3,050

2,910

2,650

2,530

2,410

2,300

2,240

2,300

Day

21

22

23

24

25

26

27

28

29

30

31

t .................. ......... ..... ....................

May

19,200

24,100

25,300

25,600

27,800

27,100

28,400

31,400

34,200

32,800

26,600

18,020 

5.47

June

10,700

11,100

10,300

8,710

8,260

7,380

6,960

6,340

5,740

5,360

14,700 

4.31

July

2,300

2,140

1,990

1,890

1,890

1,840

1,740

1,790

2,040

2,140

1,940

2,767

0 .84

Gage height, in feet, and discharge, in second-feet, at indicated time, 1943

3 

3

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

10.97 

11.00> 

11.12 

11.28 

11.48 

J.1.65

13,500 

13,600 

13,900 

14,300 

14,900 

15,400

May 23

15.07 

14.67 

14.55 

14.52 

14.49 

14.47

M:

17.03 

17.01 

16.99 

17.03 

17.18 

17.24

Ju

13.54 

13.52 

13.54 

13.49 

13.42 

13.36

26,500 

25,100 

24,600 

24,500 

24,400 

24,400

iy29

34,100 

34,000 

33,900 

34,100 

34,700 

34,900

ne 4

21,100 

21,100 

21,100 

21,000 

20,700 

20,500

June 10

12.93 

12.93 

12.88 

12.84 

12.94 

13.21

19,100 

19,100 

19,000 

18,900 

19,200 

20,100

June 16

10.75 

10.74 

10.78 

10.83 

10.92 

11.09

12,900 

12,900 

13,000 

13,100 

13,400 

13,800

Gage 

height Discharge

May 18

11.84 

11.95 

12.05 

12.10 

12.15 

12.17

15,900 

16,200 

16,500 

16,600 

16,800 

16,800

May 24

14.50 

14.61 

14.77 

14.98 

15.17 

15.30

24,500 

24,900 

25,400 

26,200 

26,900 

27,400

May 30

17.13 

16.88 

16.65 

16.48 

16.35 

16.10

Ju

13.35 

13.35 

13.35 

13.35 

13.35 

13.34

34,500 

33,500 

32,600 

31,900 

31 , 400 

30,400

ne5

20,500 

20,500 

20,500 

20,500 

20,500 

20,500

June 11

13.50 

13.80 

14.00 

14.15 

14.12 

14.02

21,000 

22,000 

22,700 

23,200 

23,100 

22,800

June 17

11.22 

11.26 

11.30 

11.32 

11.33 

11.28

14,200 

14,300 

14,400 

14,500 

14,500 

14,300

Gage 

height Discharge

May 19

12.17 

12.16 

12.15 

12.14 

12.10 

12.07

16,800 

16,800 

16,800 

16,700 

16,600 

16,500

May 25

15.37 

15.42 

15.45 

15.46 

15.51 

15.48

Mi

15.69 

15.29 

15.00 

14.80 

14.57 

14.32

27,600 

27,800 

27,900 

28,000 

28,100 

28,000

iy31

28,800 

27,300 

26,300 

25,500 

24,700 

23,800

June 6

13.28 

13.25 

13.25 

13.30 

13.33 

13.32

20,300 

20,200 

20,200 

20,400 

20,400 

20,400

June 12

13.88 

13.74 

13.45 

13.16 

12.96 

12.80

22,300 

21,800 

20,800 

19,900 

19,200 

18,700

June 18

11.20 

11.14 

11.10 

11.00 

10.93 

10.91

14,100 

14,000 

13,900 

13,600 

13,400 

13,400

Gage 

height Discharge

May 20

12.01 

11.97 

12.00 

12.06 

12.18 

12.35

16,400 

16,200 

16,300 

16,500 

16,900 

17,400

May 26

15.32 

15.14 

15.09 

15.15 

15.29 

15.38

Ju

14.10 

13.99 

13.91 

13.82 

13.72 

13.62

Ju

13.25 

13.25 

13.30 

13.35 

13.37 

13.40

27,400 

26,800 

26,600 

26,800 

27,300- 

27,700

ne 1

23,100 

22,700 

22,400 

22,100 

21,800 

21,400

ne7

20,200 

20,200 

20,400 

20,500 

20^,600 

20', 7 00

June 13

12.65 

12.48 

12.33 

12.16 

12.00 

11.87

18,300 

17,700 

17,300 

16,800 

16,300 

16,000

June 19

10.87 

10.74 

10.60 

10.45 

10.34 

10.26

13,300 

12,900 

12,600 

12,200 

11,900 

11,700

Gage 

height Discharge

May 21

12.52 

12.70 

12.91 

13.16 

13.40 

13.62

17,900 

18,400 

19,100 

19,900 

20,700 

21,400

May 27

15.38 

15.35 

15.44 

15.63 

15.87 

16.07

27,700 

27,600 

27,900 

28,600 

29,500 

30,300

June 2

13.55 

13.52 

13.54 

13.55 

13.55 

13.54

Ju

13.36 

13.36 

13.40 

13.40 

13.35 

13.25

21,200 

21,100 

21,100 

21,200 

21 , 200 

21,100

ne 8

20,500 

20,500 

20,700 

20,700 

20,500 

20,200

June 14

11.75 

11.56 

11.44 

11.33 

11.25 

11.19

15,600 

15,100 

14,800 

14,500 

14,300 

14,100

June 20

10.19 

10.15 

10.07 

10.00 

9.99 

9.97

11,500 

11,400 

11,200 

11,100 

11,000 

11,000

Gage 

height Discharge

May 22

13.78 

13.92 

14.03 

14.35 

15.46 

15.69

22,000 

22,400 

22,800 

23<900 

26,000 

28,800

May 28

16.16 

16.16 

16.24 

16.42 

16.69 

16.94

30,600 

30,600 

30,900 

31,600 

32,700 

33,700

June 3

13.46 

13.45 

13.49 

13.54 

13.^6 

13.56

Ju

13.15 

13.12 

13.12 

13.05 

12.95 

12.94

20,900 

20,800 

21,000 

21,100 

21,200 

21,200

ne 9

19,900 

19,800 

19,800 

19,500 

19,200 

19,200

June 15

11.10 

11.04 

10.96 

10.88 

10.84 

10.80

13,900 

13,700 

13,500 

13,300 

- 13,200 

13,100

June 21

9.92

9.83 

9.80 

9.78 

9.85 

9.94

10,900 

10,700 

10,600 

10,500 

10,700 

10,900

Supplemental record.- May 22, 3 

29,100 sec.-ft.; May 29, 11 p.m.,

p.m., 14.15 ft., 23,200 sec.-ft. 

17.25 ft., 35,000 sec.-ft.

10 p.m., 15.77 ft. .
130 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Colvllle River Basin

Colville River at Kettle Palls, Wash.

Location.- Lat. 48°36', long. 118°04', in sec. 29, T. 36 N., R. 38 E., 500 feet downstream from power plant at foot of Meyers Falls, half a mile south of town of Kettle

Falls, and 5 miles upstream from mouth. 

Drainage area.- 1,010 square miles. 

Gage-height record.- Staff gage read twice daily. 

Discharge record.- Stage-discharge relation defined by current meter measurements. Gage

heights used to hundredths May 17 to June 21; half-tenths below and tenths above 6.5

feet May 1-16, June 22 to July 31. Shifting-control method used June 26 to July 31. 

Maxima.- May-June 1948: Discharge observed, 2,200 second-feet 11:15 a.m. and 1:25 p.m.

May 14 (gage height, 9.45 feet).

1922 to April 1948: Discharge observed, 2,720 second-feet Apr. 20, 1938. 

Remarks.- Several ditches divert water above station for irrigation. Slight regulation

for power by small reservoir above falls. Gage-height record furnished by Washington

Water Power Co.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,350

1,350

1,350

1,470

1,590

1,650

1,770

1,770

1,890

2,030

June

1,380

1,300

1,240

1,200

1,180

1,160

1,120

1,050

997

946

July

762

668

668

622

577

622

622

622

577

577

Day

11

12

13

14

15

16

17

IK

19

20

May

2,100

2,100

2,030

2,170

2,170

2,100

1,960

1,900

1,860

1,820

June

908

928

971

976

933

971

1,080

1,110

1,120

1,050

July

533

533

512

490

469

428

408

408

389

389

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ........... ....................

Runoff, in inches .................................................. .............. .........................................................

May

1,750

1,700

1,710

1,700

1,650

1,600

1,560

1,520

1,500

1,500

1,440

1,744

1.99

June

1,010

958

958

1,010

1,010

958

958

908

858

810

1,035

1.14

July

370

352

352

334

317

317

300

317

334

317

300

467

0.53

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

7

4

7

4

7

4

7

4

7

2

3

4

7

4

7

4

7

4

7

4

height Discharge

May 17

9.10

9.10

1,960

1,960

May 18

9.05

9.00

1,920

1,890

May 19

8.95

8.95

1,860

1,860

May 20

8.90

8.88

1,830

1,820

May 21

8.80

8.75

8.72

8.75

May

8.70

8.68

1,770

1,740

1,720

1,740

22

1,710

1,700

May 23

8.70

8.70

May

8.70

8.65

1,710

1,710

24

1,710

1,680

May 25

8.60

8.60

1,650

1,650

Hour

7

4

7

4

7

4

7

4

7

4

7

4

7

4

7

4

7

4

Gage 

height Discharge

May 26

8.55

8.50

1,620

1,590

May 27

8.47

8.45

1,570

1,560

May 28

8.40

8.38

1,530

1,520

May 29

8.35

8.35

1,500

1,500

May 30

8.40

8.30

1,530

1,470

May 31

8.25

8.25

1,440

1,440

June 1

8.18

8.10

1,400

1,350

June 2

8.05

8.00

1,320

1,290

June 3

7.95

7.90

1,260

1,230

Hour

7

4

7

4

7

4

7

4

7

4

7

4

7

4

7

4

7

4

Gage 

height Discharge

June 4

7.85

7.85

1,200

1,200

June 5

7.82

7.80

1,190

1,180

June 6

7.77

7.75

1,160

1,150

June 7

7.72

7.68

1,130

1,110

June 8

7.60

7.55

1,060

1,040

June 9

7.50

7.45

1,010

984

June 10

7.40

7.35

958

933

June 11

7.30

7.30

908

908

June 12

7.33

7.35

923

933

Hour

7

4

7

4

7

4

7

4

7

4

7

4

7

4

7

4

7

4

Gage 

height

June

7.40

7.45

June

7.45

7.42

June

7.35

7.35

Discharge

13

958

984

14

984

968

15

933

933

June 16

7.40

7.45

June

7.60

7.65

June

7.67

7.70

June

7.70

7.68

June

7.60

7.55

June

7.50

7.50

958

984

17

1,060

1,090

18

1,100

1,120

19

1,120

1,110

20

1,060

1,040

21

1,010

1,010
COLVILLE RIVER BASIN 131

Mill Creek near Colville, Wash.

Location.- Lat. 48°34'55", long. 117°51'00", in lot 3, NW£ sec. 35, T. 36 N., R. 39 E., 

3 miles northeast of Colville and 5 miles downstream from North Pork. Datum of gage 

is 1,964.3 feet above mean sea level (Stevens County bench mark, subject to correction to datum of 1929).

Drainage area.- 82 square miles.

gage-height "record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

400 second-feet and extended to peak stage. Gage heights used to hundredths May 17 

to June 21; half-tenths above and hundredths below 3.4 feet May 1-16, June 22 to 

July 31.

Maxima.- May-June 1948: Discharge, 538 second-feet 7:30 a.m. May 4 (gage height, 5.25

1940 to April 1948: Discharge, 466 second-feet Apr. 19, 1946 (gage height, 5.19 

feet). 

Remarks.- Some diversion above station for irrigation. No regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

260

244

256

464

372

400

410

410

400

363

June

163

150

150

158

144

130

120

112

105

110

July

76

73

69

67

78

83

77

79

69

65

Day

11

12

13

14

15

16

17

18

19

20

May

354

354

439

391

354

336

332

330

306

296

June

119

138

111

102

96

130

162

130

115

109

July

63

61

58

56

53

51

49

48

50

53

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet................................................................................

Runoff, in inches............................................................................................................................

May

286

276

306

273

250

234

218

205

206

195

176

313

4.40

June

112

109

122

124

113

' 104

98

91

85

80

120

1.63

July

48

48

41

41

39

36

38

59

48

41

37

56.6

0.80

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.18

4.21 

4.18

332

338 

332

May 23

4.02 

4.06 

4.12

3.93

Mi

3.38 

3.40 

3.45 

3.47 

3.48 

3.45

Ju

3.09

3.11 

3.12

3.08

304 

311 

322

288

iy29

198 

201 

209 

212 

214 

209

ne4

156

158 

160

154

r June 10

2.70

2.77 

2.79

2.74

Ju

2.77 

2.79 

2.79 

2.95 

3.10 

3.23

105

113 

116

110

ne!6

113 

116 

116 

136 

157 

176

Gage 

height Discharge

May 18

4.18 

4.20 

4.18

4.09

332 

336 

332

316

May 24

3.84 

3.76

M

3.35 

3.28

273 

259

iy30

194 

183

June 5

3.00 

2.93

Ju

2.71 

2.83 

2.96 

3.09

143 

134

nell

106 

121 

138 

156

June 17

3.28 

3.12

2.98

183 

160

140

Gage

height Discharge

May 19

4.03 

3.98

305 

297

May 25

3.71 

L 3.65

251 

241

May 31

3.23 

3.18

Ju

2.91 

2.84

176 

168

ne6

131 

122

June 12

3.09 

3.01 

2.96

2.84 

2.80

156 

144 

138

122 

117

June 18

2.90 

2.81

130 

118

a|DW««-

May 20

3,98 

3.95

297 

292

May 26

3.62 

3.54

236 

223

June 1

3.15 

3.09

Ju

2.83 

2.78

164 

156

ne7

121 

115

June 13

2.75 

2.70

111 

105

June 19

2.79 

2.73

116 

109

Gage 

height Discharge

May 21

3.92 

3.89

286 

281

May 27

3.52 

3.46

Ju

3.06 

3.00

Ju

2.77 

2.72

220 

211

ne2

151 

143

ne8

113 

107

June 14

2.68 

2.62

103 

95

June 20

2.73 109

Gage 

height

Mi

3.83 

3.84

3.92

Ms

3.43 

3.38

Ju

3.00

3.13 

3.13

Ju

2.71

2.67 

2.68

Ju

2.61 

2.60 

2.67 

2.73

Discharge

iy22

271 

273

286

y28

206 

198

ne3

143

161 

161

ne9

106

101 

103

ne!5

94 

93 

101 

109

June 21

2.77 

2.75

113 

111
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Spotcane River Basin

Coeur d'Alene River near Prichard, Idaho

Location.- Lat. 47°38', long. 115°59', in lot 7, sec. 32, T. 50 N., R. 4 E., 0.2 mile

downstream from Beaver Creek and If miles southwest of Prichard. 

Drainage area.- 596 square miles. 

Page-height record.- Staff gage read once daily to hundredths except May 7, 8, 13, 14,

17,20-29, when it was read twice daily. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

9,750 second-feet and extended to peak stage by logarithmic plotting. 

Maxima.- May-June 1948: Discharge observed, 11,300 second-feet 6 a.m. May 21 (gage

height, 9.24 feet).

1944 to April 1948: Discharge observed, 11,700 second-feet Apr. 26, 1946 (gage

height, 9.40 feet). 

Remarks.- No regulation or diversion above station.

Mean discharge, in second-feet, 19&8

Day

1

2

3

4

5

6

7

8

9

10

May

4,850

4,210

3,740

4,150

4,210

4,270

7,080

7,200

6,630

5,990

June

4,270

4,060

3,850

4,060

3,910

3,430

3,220

2,960

2,700

2,700

July

1,020

976

928

864

832

788

772

788

716

653

Day

11

12

13

14

15

16

17

18

19

20

May

5,400

4,210

6,670

7,380

6,200

5,030

7,620

7,600

6,720

9,290

June

2,460

2,270

1,790

1,920

1,720

1,720

2,340

2,270

2,070

1,920

July

630

618

596

575

555

535

525

506

506

716

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ...........................................................................................................................

May

11,000

10,100

9,290

10,500

9,810

9,290

8,780

8,280

6,740

5,790

4,680

6,862

13.27

June

1,820

1,660

1,530

1,400

1,370

1,350

1,310

1,220

1,170

1,100

2,319

4.34

July

788

618

555

535

496

487

460

535

- 716

596

535

659

1.27

Gage height, in feet, and discharge, in second-feet, at indicated time,

Hour

6a

?P

7

8:45

12:25

6a

6a

?P

6a

?P

7

6

7

7

6a

?P

height

May

7.60

8.06

May

7.94

7.90

7.82

May

7.44

May

8.10

8.90

May

9.24

9.00

May

8.94

8.70

May

8.40

8.60

May

9.06

8.90

Discharge

17

7,080

8,180

18

7,890

7,790

7,600

19

6,720

20

8,280

10,200

21

11,300

10,600

22

10,300

9,810

23

9,030

9,550

24

10,800

10,200

Hour

6

6

6

6

6

6

6

6

6

6

6a

6a

6a

Gage 

height

May

8.80

8.60

May

8.60

8.40

May

8.40

8.20

May

8.30

7.90

May

7.60

7.30

May

7.00

May

6.40

June

6.14

Discharge

25

10,100

9,550

26

9,550

9,030

27

9,030

8,530

28

8,780

7,790

29

7,080

6,410

30

5,790

31

4,680

1

4,270

Hour

6a

6a

6a

6a

6a~

6a

6a

6a

6a

6a

Gage 

height Discharge

June 2

6.00

Jun

5.86

4,060

e 3

3,850

June 4

6.00

Jun

5.90

4,060

e 5

3,910

June 6

5.56

Jun

5.40

3,430

e 7

3,220

June 8

5.20

Jun

5.00

Jun

5.00

2,960

e 9

2,700

e 10

2,700

June 11

4.80 2,460

Hour

6a

6a

6a

6a

6a

6a

6a

6a»

6a

6a

Gage 

height Discharge

June 12

4.64

Jun

4.20

2,270

e 13

1,790

June 14

4.33

Jun

4.13

1,920

e 15

1,720

June 16

4.13

Jun

4.70

1,720

e 17

2,340

June 18

4.64

Jun

4.46

Jun

4.33

2,270

e 19

2,070

e 20

1,920

June 21

4.23 1,820
SPOKANE RIVER BASIN 133

Coeur d'Alene River at Enavllle, Idaho

Location.- Lat. 47°34', long. 116°15', In NW£ sec. 30, T. 49 N., R. 2 E., 800 feet

upstream from highway bridge, a quarter of a mile northwest of Enavllle post office, 

1.1 miles upstream from South Pork, and 3.5 miles downstream from North Pork. Datum 

of gage Is 2,100.00 feet above mean sea level, referenced to bench mark near mouth 

of North Pork, elevation 2,204.880 (U. S. Geol. Survey Bull. 567, p. 82).

Drainage area.- 895 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements 

below 13,100 second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge, 14,600 second-feet 1 p.m. May 21 (gage height, 

69.89 feet).

1939 to April 1948: Discharge, 17,700 second-feet Apr. 15, 1943 (gage height, 

71.80 feet).

Prom local Information concerning high-water marks, flood In December 1933 

reached a stage of 79.47 feet and that In April 1938 a stage of 78.16 feet.

Remarks.- No appreciable diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

7,180

6,040

5,300

5,870

6,350

6,520

9,600

11,100

10,200

8,840

June

5,620

5,250

5,010

5,210

4,870

4,350

4,030

3,770

3,480

3,330

July

1,480

1,390

1,300

1,230

1,220

1,180

1,140

1,130

1,040

982

Day

11

12

13

14

Ifi

16

17

18

19

20

May

7,980

8,060

9,280

10,900

8,950

7,940

10,100

10,900

9,280

11,100

June

3,130

2,980

2,720

2,530

2,350

2,370

2,960

2,930

2,720

2,490

July

953

924

883

850

830

805

774

' 755

843

1,260

Day

21

22

23

24? >

26

27

28

29

30

31

Monthly mean discharge, in second-feet ............................................ ..... . ..................._.....

Runoff, in inches ............................................................................................................................

May

14,100

13,600

12,600

14,100

13,700

13,000

12,000

11,300

9,510

7,540

6,220

9,650

12.43

June

2,380

2,280

2,110

1,990

2,010

1,920

1,860

1,750

1,630

1,540

3,052

3.81

July

1,180

960

870

818

762

731

737

938

1,180

1,050

924

1,004

1.29

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

67.50 

67.80 

68.15 

68.42 

68.56 

68.60

8,820 

9,480 

10,300 

10,900 

11,300 

11,400

May 23

69.17 

69.08 

69.02 

69.03 

69.15 

69.30

M;

68.06 

67.95 

67.84 

67.70 

67.52 

67.34

Jll

65.38 

65.49 

65.57 

65.57 

65.49 

65.46

12,700 

12,500 

12,400 

12,400 

12,700 

13,100

y29

10,100 

9,840 

9,580 

9,260 

8,860 

8,480

ne 4

5,040 

5,220 

5,350 

5,350 

5,220 

5,170

June 10

64.28 

64.27 

64.22 

64.13 

64.07 

64.03

Ju

63.37 

63.36 

63.35 

63.38 

63.48 

63.56

3,450 

3,440 

3,370 

3,260 

3,180 

3,120

ne!6

2,330 

2,320 

2,310 

2,340 

2,460 

2,560

Gage 

height Discharge

May 18

68.57 

68.48 

68.40 

68.32 

68.18 

68.05

11,300 

11,100 

10,900 

10,700 

10,400 

10,100

May 24

69.56 

69.75 

69.87 

69.83 

69.70 

69.58

13,700 

14,200 

14,500 

14,400 

14,100 

13,800

May 30

67.17 

67.00 

66.84 

66.68 

66.54 

66.40

Ju

65.37 

65.34 

65.31 

65.21 

65.14 

65.07

8,140 

7,800 

7,500 

7,210 

6,960 

6,720

ne 5

5,030 

4,980 

4,930 

4,77O 

4,660 

4,560

June 11

64.02 

64.05 

64.06 

64.04 

64.03 

64.02

3,110 

3,150 

3,160 

3,140 

3,120 

3,110

June 17

63.79 

63.91 

63.96 

63.95 

63.93 

63.94

Supplemental record.

64.30 ft., 3,480 sec.-f

2,850 

3,000 

3,060 

3,050 

3,020 

3,030

Gage 

height Discharge

May 19

67.89 

67.75 

67.64 

67.56 

67.54 

67.65

9,700 

9,370 

9,130 

8,950 

8,910 

9,150

May 25

69.55 

69.58 

69.61 

69.56 

69.49 

69.38

ME

66.28 

66.18 

66.10 

66.01 

65.93 

65.87

Ju

65.02 

64.97 

64.93 

64.89 

64.83 

64.78

13,700 

13,800 

13,800 

13,700 

13,600 

13,300

y31

6,520 

6,350 

6,210 

6,060 

5,920 

5,820

[ne6

4,480 

4,410 

4,350 

4,290 

4,200 

4,130

June 12

63.99 

63.95 

63.92 

63.87 

63.81 

63.76

3,090 

3,030 

3,000 

2,930 

2,860 

2,800

June 18

63.91 

63.88 

63.87 

63.83 

63.81 

63.78

3,000 

2,960 

2,940 

2,890 

2,870 

2,830

Gage 

height Discharge

May 20

67.88 

68.21 

68.54 

68.82 

69.09 

69.31

9,670 

10,400 

11,200 

11,900 

12,600 

13,100

May 26

69.36 

69.37 

69.37 

69.29 

69.14 

69.02

Ju

65.82 

65.79 

65.79 

65.73 

65.65 

65.60

13,200 

13,200 

13,200 

13,100 

12,700 

12,400

ne 1

5,730 

5,680 

5,680 

5,590 

5,460 

5,380

June 7

64.76 

64.75 

64.73 

64.68 

64.64 

64.60

Ju

63-. 73 

63.72 

63.70 

63.67 

63.64 

63.62

4,100 

4,080 

4,060 

3,990 

3,930 

3,870

ne!3

2,760 

2,750 

2,730 

2,690 

2,650 

2,630

June 19

63.75 

63.72 

63.69 

63.65 

63.62 

63.58

2,800 

2,760 

2,730 

2,680 

2,640 

2,590

Gage 

height Discharge

May 21

69.51 

69.70 

69.83 

69.86 

69.73 

69.60

13,600 

14,100 

14,400 

14,500 

14,200 

13,800

May 27

68.96 

68.96 

68.93 

68.85 

68.72 

68.65

12,200 

12,200 

12,200 

12,000 

11,600 

11,500

June 2

65.58 

65.57 

65.54 

65.49 

65.44 

65.39

Ju

64.57 

64.56 

64.55 

64.49 

64.43 

64.38

5,350 

5,330 

5,280 

5,200 

5,120 

5,040

ne8

3,850 

3,830 

3,820 

3,730 

3,650 

3,580

June 14

63.59 

63.59 

63.54 

63.51 

63.47 

63.43

2,590 

2,570 

2,530 

2,500 

2,450 

2,400

June 20

63.55 

63.52 

63.50 

63.47 

63.43 

63.42

2,560 

2,520 

2,500 

2,460 

2,410 

2,400

Gage 

height

Ms

69.55 

69.57 

69.60 

69.57 

69.45 

69.32

Discharge

iy22

13,700 

13,700 

13,800 

13,700 

13,400 

13,100

May 28

68.67 

68.73 

68.70 

68.57 

68.39 

68.21

Ju

65.35 

65.33 

65.32 

65.36 

65.41 

65.37

11,500 

11,700 

11,600 

11,300 

10,900 

10,400

ne3

5,000 

4,960 

4,950 

5,010 

5,090 

5,030

June 9

64.34 

64.31 

64.29 

64.25 

64.28 

64.25

Ju

63.41 

63.38 

63.37 

63.40 

63.36 

63.35

3,530 

3,490 

3,460 

3,410 

3,450 

3,410

ne!5

2,380 

2,340 

2,330 

2,370 

2,320 

2,310

June 21

63.41 

63.40 

63.40 

63.39 

63.38 

63.36

2,400 

2,390 

2,390 

2,380 

2,370 

2,340

- May 21, 1 p.m., 69.89 ft., 14,600 sec. -ft.; June 9, 6 p.m.,

t.
.34 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Coeur d'Alene River near Cataldo, Idaho

Location.- Lat. 47°34', long. 116°18', in sec. 26, T. 49 N., R. IE., l| miles upstream 

 from tiataldo and 3 miles downstream from South Fork. Datum of gage is 2,100 feet

above mean sea level, referenced to bench mark "2143 S" (U. S. Geol. Survey Bull.

567, p. 82).

Drainage area.- 1,220 square miles. 

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 18,600 second-feet 10 a.m. to 3 p.m. May 21; gage

height, 47.47 feet noon to 2 p.m. May 21.

1911-12, 1920 to April 1948: Discharge, 55,300 second-feet Dec. 22 or 23, 1933

(gage height, 56.9 feet, from floodmark), from rating curve extended above 24,000

second-feet by logarithmic plotting. 

Remarks.- No appreciable diversion or regulation above station. Water-stage recorder

graph and two discharge measurements furnished by Washington Water Power Co.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

9,300

8,010

7,220

7,930

8,290

8,490

12,100

13,900

13,000

11,400

June

8,420

7,870

7,500

7,570

7,040

6,300

5,880

5,470

5,080

4,820

July

2,170

2,050

1,940

1,850

1,820

1,760

1,720

1,670

1,550

1,480

Day

11

12

13

14

15

16

17

18

19

2tt

May

10,400

10,400

12,000

13,800

11,600

10,700

13,100

14,000

12,400

14,700

June

4,580

4,290

3,910

3,630

3,380

3,430

4,060

4,020

3,760

3,490

July

1,450

1,400

1,340

1,290

1,260

1,240

1,200

1,160

1,330

1,880

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches............................................................................................................................

May

18,300

18,200

16,500

18,000

18,100

17,600

16,300

15,800

13,500

11,000

9,240

12,750

12.05

June

3,340

3,200

3,010

2,850

2,840

2,760

2,690

2,530

2,380

2,260

4.03

July

1,790

1,490

1,320

1,250

1,150

1,090

1,090

1,420

1,760

1,560

1,400

1,512

1.43

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

IM

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

S 

N 

4 

8 

12

Gage 

height Discharge

May 17

45.62 

46.05 

46.22

Mi

46.86

46.75 

46.80 

47.00

M:

46.18 

45.86 

45.58

Ju

43.80

43.88 

43.86

43.77

12,600 

13,900 

14,400

iy23

16,500

16,100 

16,300 

17,000

iy29

14,000 

13,100 

12,200

ne4

7,500

7,690 

7,650

7,430

June 10

42.55 

42.50 

42.40

42.31

Ju

41.52

41.51 

41.49 

41.67 

41.78

4,960 

4,870 

4,690

4,530

ne!6

3,380

3,360 

3,340 

3,590 

3,760

Gaze 

height Discharge

May 18

46.19 

46.03 

45.82

14,300 

13,800 

13,200

May 24

47.19 

47.32 

47.41

47.32 

47.32

M:

45.14 

44.76

Ju

43.60 

43.39

Ju

42.36 

42.32 

42.31

17,600 

18,100 

18,400

18,100 

18,100

iy30

10,900 

9,920

ne 5

7,070 

6,610

nell

4,630 

4,560 

4,540

June 17

41.85 

41.98 

42.04

42.01

3,880 

4,070 

4,170

4,120

Gage 

height Discharge

May 19

45.45 

45.42 

45.44 

45.56

12,100 

12,000 

12,100 

12,400

May 25

47.37

47.27 

47.26

Mi

44.50 

44.30

18,300

17,900 

17,900

iy31

9,190 

8,680

June 6

43.24 

43.12

6,280 

6,030

June 12

42.16 

41.99

4,300 

4,030

June 18

41.95 

41.85

4,030 

3,880

Gaze 

height

Ma

46.05 

46.53 

47.01

Discharge

y20

13,900 

15,400 

17,000

May 26

47.27 

47.25

47.02 

47.00

17,900 

17,800

17,100 

17,000

June 1

44.20 

44.06

8,440 

8,100

June?

43.05 

42.94

Ju

41.91 

41.80

5,910 

5,690

ne!3

3,920 

3,760

June 19

41.77 

41.66

3,770 

3,600

Gage 

height Discharge

May 21

47.27 

47.41 

47.47

47.40

17,900 

18,400 

18,600

18,400

May 27

46.90 

46.74 

46.74

16,500 

16,000 

16,000

June 2

44.02 

43.92 

43.83

Ju

42.88 

42.79 

42.70

Ju

41.71 

41.60

Ju

41.57 

41.49

8,010 

7,770 

7,550

ne8

5,570 

5,390 

5,210

ne 14

3,640 

3,480

ne20

3,490 

3,380

Gage 

height

Mi

47.40 

47.35

47.10

Discharge

iy22

18,400 

18,200

17,300

May 28

46.83 

46.77

46.39

16,200 

16,000

14,800

June 3

43.77

43.82 

43.80

Ju

42.63

42.55 

42.63 

42.59

7,430

7,550 

7,500

ne9

5,100

4,960 

5,100 

5,030

June 15

41.51 

41.50

3,350 

3,340

June 21

41.47 

41.42

3,350 

3,280

Supplemental record.-.June 9, 6 p.m., 42.63 ft., 5,100 sec.-ft.
SPOKANE RIVER BASIN 135

Coeur d'Alene Lake at .Coeur d'Alene, Idaho

Location.- Lat. 47°40", long. 116°46', In sec. 24, T. 50 N., R. 4 W., 500 feet southwest 

of south end of Eleventh Stueet, Coeur d'Alene. Datum of gage Is 2,100.00 feet above 

mean sea level, referred to originally accepted elevation (2,157.40 feet) of Geological Survey bench mark in southeast corner of Merrlam Building (see Water-Supply Paper 

882).

Drainage area.- 3,750 square miles.

Gage-height "record.- Water-stage recorder graph.

Maxima. - May-June 1948; Gage height, 35.95 feet 3 to 4 p.m. May 30. 

T903 to April 1948: Gage height, 39.05 feet Dec. 25, 1933. 

Maximum stage known prior to 1903, 37.6 feet May 31, 1894, from high-water marks.

Remarks.- Washington Water Power Co. stores considerable water In lake. Stage regulated 

by talntor gates and bear-trap dam at Post Falls. Water-stage recorder graph 

furnished by Washington Water Power Co.

Mean gage height, In feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

31.57

31.45

31.27

31.08

30.93

30.82

30.80

31.11

31.58

31.93

June

35.47

35.09

34.71

34.39

34.06

33.71

33.32

32.95

32.56

32.16

July

26.59

26.75

26.93

27.13

27.34

27.51

27.65

27.76

27.84

27.92

Day

11

12

13

14

15

16

17

18

19

20

May

32.09

32.13

32.18

32.27

32.40

32.44

32.44

32.54

32.71

32.88

June

31.82

31.51

31.17

30.82

30.44

30.10

29.81

29.51

29.21

28.94

July

27.94

27.96

27.93

27.94

27.95

27.94

27.94

27.95

27.96

28.02

Day

21

22

23

24

25

26

27

28

29

30

31

May

33.12

33.55

34.19

34.81

35.08

35. SI

35.56

35.66

35.87

35.94

35.76

June

28.72

28.46

28.18

27.93

27.68

27.46

27.22

26.95

26.67

26.47

July

28.01

27.97

27.95

27.93

27.91

27.93

27.96

27.97

28.00

27.96

27.96
136 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Spokane River at Post Falls, Idaho

Location.- Lat. 47°42', long. 116°58', In see. 4, T. 50 N., R. 5 W., 1,500 feet downstream from power plant of Washington Water Power Co., 3,300 feet downstream from 

Intake of Spokane Valley Farms Co. 's canal, and 1 mile west of Post Falls. Datum 

of gage Is 2,000 feet above mean sea level, referenced to same datum as gage on 

Coeur d'Alene Lake at Coeur d'Alene (see preceding page).

Drainage area.- 3,880 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.-^"Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 40,300 second-feet 10 p.m. May 30 (gage height, 

78.98 feet).

1913 to April 1948: Maximum discharge, 50,100 second-feet when recorder was not 

operating Dec. 25, 1933 (determined from unpublished records collected by Washington 

Water Power Co. for station at Liberty Bridge).

Remarks.- Spokane Valley Farms Co.'s canal and Rathdrum Prairie Canal divert water above 

gage for Irrigation. Flow partly regulated by Coeur d'Alene Lake (see preceding 

page). Diurnal fluctuation due to power plant operation May 1-24, June 15 to July 

31. Water-stage recorder graph and three discharge measurements furnished by 

Washington Water Power Co.

Mean discharge, in second-feet,

Day

1

2

3

4

5

6

7

8

9

10

May

25,000

24,300

24,100

23,300

22,700

22,400

22,500

23,200

24,500

25,800

June

38,400

37,000

35,600

34,300

33,200

32,000

30,700

29,300

27,900

26,400

July

1,650

822

283

255

277

618

1,300

1,150

1,390

1,520

Day

11

12

13

14

1fi

16

17

18

19

20

May

26,400

26,600

26,800

26,900

27,300

27,300

27,400

27,600

28,200

28,600

June

25,300

24,500

23,500

22,200

20,800

19,800

19,000

18,200

17,300

16,200

July

2,130

3,290

2,420

2,170

2,130

2,120

1,900

1,850

2,130

2,890

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .................................................

Runoff, in inches ............................................ .................. ............................................................

May

29,500

30,900

33,000

35,400

36,700

37,800

38,700

39,200

39,800

40,200

39,700

29,410

8.74

June

15,800

15,100

14,400

13,700

13,200

12,700

11,900

11,500

-11,000

5,680

21,890

6.29

July

4,390

3,540

2,830

2,220

1,200

1,620

2,400

3,930

5,710

4,590

3,540

2,202

0.65

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 23

M:

78.84 

78.87 

78.90 

78.91 

78.93 

78.94

iy29

39,700 

39,800 

39,900 

40,000 

40,000 

40,100

June 4

77.75 

77.69 

77.63 

77.57 

77.54 

77.50

34,800 

34,500 

34,200 

34,000 

33,900 

33,700

June 10

75.97 

75.91 

75.83 

75.76 

75.72 

75.69

27,000 

26,700 

26,400 

26,000 

25,900 

25,800

Gage 

height Discharge

May 24

78.07

M

78.94 

78.94 

78.95 

78.96 

78.96 

78.97

Ju

77.46 

77.41 

77.38 

77.29 

77.42 

77.30

Ju

75.65 

75.62 

75.58 

75.58 

75.52 

75.50

36,200

ly30

40,100 

40,100 

40,200 

40,200 

40,200 

40,200

ne5

33,500 

33 , 200 

33,100 

32,800 

33,300 

32,800

nell

25,600 

25,400 

25,200 

25,200 

25,000 

24,900

Gage 

height Discharge

May 25

78.09 

78.13 

78.17 

78.22 

78.28 

78.34

36,300 

36,400 

36,600 

36,900 

37,100 

37,400

May 31

78.91 

78.89 

78.86 

78.81 

78.77 

78.73

40,000 

39,900 

39,700 

39,500 

39,400 

39,200

June 6

77.25 

77.18 

77.12 

77.08 

77.02 

76.99

32,600 

32,200 

32,000 

31,800 

31,600 

31,400

June 12

75.47 

75.42 

75.40 

75.36 

75.32 

75.29

24,800 

24,600 

24,500 

24,300 

24,200 

24,000

Gage 

height Discharge

May 26

78.37 

78.40 

78.39 

78.46 

78.50 

78.55

37,600 

37,700 

37,600 

37,900 

38", 100 

38,400

June 1

78.68 

78.64 

78.57 

78.53 

78.46 

78.42

Ju

76.94 

76.88 

76.81 

76.77 

76.71 

76.67

38,900 

38,800 

38,400 

38,200 

37,900 

37,800

ne7

31,200 

30,900 

30,600 

30,400 

30,200 

30,000

June 13

75.24 

75.22 

75.18 

75.15 

75.09 

75.04

23 , 800 

23,700 

23,500 

23,400 

23,200 

23,000

Gage 

height Discharge

May 27

78.58 

78.59 

78.62 

78.66 

78.71 

78.73

38,500 

38,600 

38,700 

38,800 

39,000 

39,200

June 2

78.37 

78.29 

78.26 

78.21 

78.16 

78.10

37,600 

37,200 

37,000 

36,800 

36,600 

36,300

June 8

76.63 

76.57 

76.50 

76.45 

76.39 

76.35

29,800 

29,600 

29,300 

29,000 

28,800 

28,600

June 14

75.00 

74.97 

74.88 

74.82 

74.78 

74.30

22,800 

22,700 

22,300 

22,100 

21,900 

19,900

Gage 

height

Ms

78.72 

78.74 

78.73 

78.73 

78.75 

78.78

Ju

78.06 

77.98 

77.90 

77.85 

77.84 

77.80

Jll

76.30 

76.24 

76.18 

76.13 

76.07 

76.00

Ju

Discharge

y28

39,100 

39,200 

39,200 

39,200 

39,200 

39,400

ne3

36,100 

35,800 

35,400 

35,200 

35,200 

35,000

ne9

28,400 

28,200 

27,900 

27,600 

27,400 

27,100

ne!5

Supplemental record.- May 30, 10 p.m., 78.98 ft., 40,300 sec.-ft.} June 5, 2 p.m. 

77.36 ft., 33,000 sec.-ft., 3 p.m., 77.24 ft., 32,500 sec.-ft., 7 p.m., 77.51 ft., 

33,700 sec.-ft.j June 14, 10 p.m., 74.75 ft., 21,800 sec.-ft., 11 p.m., 74.09 ft., 

19,000 sec.-ft.
SPOKANE RIVER BASIN 137

Spokane River at Spokane, Wash.

Location.- Lat. 47°39 I 30", long. 117°26 I 50", In see. 13, T. 25 N., R. 42 E., at Cochran 

Street In Spokane and ha-lf a mile upstream from Latah Creek. Datum of gage Is about 

1,700 feet above mean sea level, subject to correction to datum of 1929.

Drainage area.- 4,350 square miles; 3,750 square miles affected by storage In Coeur 

d'Alene Lake.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage 

heights used to hundredths May 17 to June 21; half-tenths below and tenths above 20.2 

feet May 1-16 and June 22 to July 31. Shifting-control method used June 1 to July 30.

Maxima.- May-June 1948: Discharge, 39,600 second-feet 1:30 a.m. May 31 (gage height, 

28.35 feet).

1891 to April 194'8: Discharge, 49,000 second-feet (estimated) May 31, 1894.

Remarks.- Plow partly regulated by Coeur d'Alene Lake and some diurnal fluctuation 

caused by power plant at Spokane Palls. Spokane Valley Farms Co.'s canal diverts 

water for irrigation.

Discharge records for this station are collected in cooperation with Washington 

Water Power Co.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

25,000

24,600

24,100

23,700

22,800

22,800

22,300

23,200

24,600

25,500

June

37,900

36,300

35,000

34,000

33,000

32,100

30,900

29,700

28,400

27,100

July

4,080

3,210

2,540

2,140

2,140

2,140

2,550

2,660

2,810

2,460

Day

11

12

13

14

15

16

17

18

19

20

May

26,000

26,500

26,500

26,500

27,000

27,000

27,100

27,300

27,800

28,300

June

26,200

25,300

24,400

23,200

22,000

21,000

20,200

19,400

18,400

17,500

July

3,080

4,260

3,820

3,040

3,240

3,130

2,960

2,850

2,960

3,650

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . . .... ..

Runoff, in inches .......................... .......... ....... .............. ... . ........ ...............................................

May

29,000

30,200

32,400

35,000

35,700

36,700

37,600

38,300

39,100

39,500

39,300

OQ rjorj

7.71

June

17,200

16,400

15,700

14,900

14,600

13,800

13,500

12,800

12,100

9,300

5.83

July

4,800

4,280

3,780

3,340

2,820

2,620

2,800

4,140

5,380

5,400

4,160

3 330

0.88

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

25.73 

25.85 

26.04 

25.95 

25.96 

25.96

Mi

26.62 

26.80 

27.12 

27.11 

27.26 

27.38

Mi

28.19 

28.22 

28.25 

28.28 

26.30 

28.31

Jt

27.57 

27.54 

27.48 

27.47 

27.43 

27,40

26,100 

26,700 

27,600 

27,200 

27,200 

27,200

y23

30,500 

31,400 

33,100 

33,000 

33,800 

34,400

iy29

38,800 

38,900 

39,100 

39,200 

39,400 

39,400

ne4

34,400 

34,200 

33,900 

33,900 

33,700 

33,500

June 10

26.21 

26.19 

26.15 

26.10 

26.03 

25.96

Ju

24.60 

24.76 

25.05 

24.80 

24.76 

24.74

27,500 

27,400 

27,200 

27,000 

26,700 

26,300

ne 16

20,200 

20,900 

22,100 

21,000 

20,900 

20,800

Gage 

height Discharge

May 18

25.74 

25.87 

26.13 

26.05 

26.04 

26.04

26,200 

26,800 

28,100 

27,700 

27,600 

27,600

May 24

27.20 

27.36 

27.62 

27.59 

27.57 

27.54

M<

28.30 

28.30 

28.32 

28.33 

28.33 

28.33

Ju

27.36 

27.32 

27.32 

27.30 

27.20 

27.30

Ju

25.96 

25.94 

25.95 

25.94 

25.90 

25.82

33,500 

34,300 

35,700 

35,500 

35,400 

35,300

iy30

39,400 

39,400 

39,500 

39,500 

39,500 

39,500

ne 5

33,300 

33,100 

33,100 

33,000 

32,500 

33,000

ne 11

26,300 

26,200 

26,300 

26,200 

26,000 

25,700

June 17

24.41 

24.60 

24.87 

24.65 

24.58 

24.48

19,400 

20,200 

21,300 

20,400 

20,100 

19,700

Gage 

height Discharge

May 19

25.84 

26.00 

26.15 

26.13 

26.13 

26.13

26,700 

27,400 

28,200 

28,100 

28,100 

28,100

May 25

27.57 

27.59 

27.64 

27.64 

27.68 

27.72

Me

28.30 

28.30 

28.29 

28.28 

28.23 

28.20

35,400 

35,500 

35,800 

35,800 

36,000 

36,200

iy31

39,400 

39,400 

39,300 

39,200 

39,000 

38,800

June 6

27.19 

27.17 

27.14 

27.10 

27.04 

26.99

32,400 

32,300 

32,200 

32,000 

31,700 

31,400

June 12

25.81 

25.77 

25.75 

25.74 

25.68 

25.64

25,600 

25,400 

25,300 

25,300 

25,000 

24,800

June 18

24.23 

24.41 

24.72 

24.46 

24.34 

24.30

18,600 

19,400 

20,700 

19,600 

19,100 

18,900

Gage 

height Discharge

May 20

25.96 

26.08 

26.26 

26.30 

26.24 

26.25

27,200 

27,800 

28,700 

28,900 

28,600 

28,700

May 26

27.78 

27.80 

27.81 

27.83 

27.84 

27.90

36,500 

36,600 

36,700 

36,800 

36,900 

37,200

June 1

28.20 

28.16 

28.14 

28.11 

28.06 

28.03

Ju

26.97 

26.95 

26.91 

26.86 

26.80 

26.74

Ju

25.60 

25.56 

25.54 

25.52 

25.48 

25.44

38,600 

38,300 

38,000 

37,700 

37,200 

36,900

ne 7

31,300 

31,200 

31,000 

30,800 

30,400 

30,200

ne!3

24,600 

24,400 

24,400 

24,300 

24,100 

23,900

June 19

24.04 

24.16 

24.44 

24.18 

24.17 

24.12

17,800 

18,300 

19,500 

18,400 

18,400 

18,200

Gage 

height Discharge

May 21

26.05 

26.18 

26.37 

26.38 

26.41 

26.46

27,700 

28,300 

29,200 

29,300 

29,400 

29,700

May 27

27.90 

27.94 

27.98 

28.00 

28.04 

28.09

Ju

28.00 

27.93 

27.93 

27.90 

27.85 

27.80

Ju

26.72 

26.70 

26.67 

26.62 

26.56 

26.51

Ju

25.39 

25.34 

25.31 

25.23 

25.21 

25.15

37,200 

37,400 

37,600 

37,700 

37,900 

38,203

ne2

36,700 

36,300 

36,300 

36,200 

35,900 

35,600

ne8

30,000 

30,000 

29,800 

29,600 

29,200 

29,003

ne 14

23,700 

23,400 

23,300 

22,900 

22,800 

22,600

June 20

23.84 

24.00 

23.98 

24.26 

23.38 

24.10

17,000 

17,700 

17,600 

18,700 

15,300 

18,100

Gage 

height

M:

26.25 

26.44 

26.66 

26.66 

26.69 

26.76

Discharge

»y22

28,700 

29,600 

30,700 

30,700 

30,800 

31,300

May 28

28.10 

28.05 

28.11 

28.11 

28.13 

28.20

38,300 

38,000 

38,300 

38,300 

38,400 

38,800

June 3

27.77 

27.74 

27.71 

27.61 

27.62 

27.60

Jt

26.48 

26.43 

26.40 

26.34 

26.24 

26.24

35,500 

35,300 

35,100 

34,600 

34,700 

34,600

ne9

28,900 

28,600 

28,500 

28,200 

27,700 

27,700

June 15

24.86 

24.98 

25.26 

25.04 

24.97 

24.90

21,300 

21,800 

23,100 

22,100 

21,800 

21,500

June 21

23.78 

23.85 

24.13 

23.91 

23.80 

23.76

16,800 

17,100 

18,200 

17,300 

16,900 

16,700
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Spokane River at Spokane, Wash. Continued

Supplemental record:

May 17,

18,

19,

20,

21,

22,

24,

31,

June 2,

5,

12,

15,

16,

17-,

18,

19,

20,

21,

2 a.m.,

6 a.m.,

2 a.m.,

10 a.m.

10 a.m.

2 a.m.,

10 a.m.

5 p.m. ,

2 a.m.,

10 a.m.

1 p.m.,

1 a.m.,

1 p.m. ,

10 a.m.

1:30 a.

10 a.m.

6 p.m.,

6 p.m.,

10 a.m.

10 a.m.

5 a.m. ,

10 a.m.

10 a.m.

 5 a.m. ,

6 p.m. ,

10 p.m.

2 a.m.,

25.86 ft., 26,800 sec.-ft.} 3 a.m., 25.67 ft., 25,800 sec.-ft.j

25.83 ft., 26,600 sec.-ft.; 10 a.m., 26.13 ft., 28,100 sec.-ft.

25.96 ft., 27,200 sec.-ft.} 5 a.m., 25.68 ft., 25,900 sec.-ft.; 

, 26.14 ft., 28,100 sec.-ft.; 1 p.m., 26.00 ft., 27,400 sec.-ft. 

, 26.28 ft., 28,800 sec.-ft.

26,11 ft., 28,000 sec.-ft.; 5 a.m., 25.94 ft., 27,100 sec.-ft.; 

, 26.34 ft., 29,100 sec.-ft.; 2 p.m., 26.20 ft., 28,400 sec.-ft.;

26.23 ft., 28,600 sec.-ft.

26.24 ft., 28,600 sec.-ft.; 6 a.m., 26.16 ft., 28,200 sec.-ft.; 

, 26.37 ft., 29,200 sec.-ft; 11 a.m., 26.47 ft., 29,800 sec.-ft.j

26.52 ft., 30,000 aec.-ft.; 2 p.m., 26.37 ft., 29,200 sec.-ft.

26.48 ft., 29,800 ft.; 10 a.m., 26.69 ft., 30,800 sec.-ft.;

26.60 ft., 30,400 sec.-ft.

, 27.61 ft., 35,600 sec.-ft.; 1 p.m., 27.69 ft., 36,000 sec.-ft. 

m., 28.35 ft., 39,600 sec.-ft. 

, 27.95 ft., 36,400 sec.-ft.

27.27 ft., 32,800 sec.-ft.; 7 p.m., 27.17 ft., 32,300 sec.-ft.

25.63 ft., 24,800 sec.-ft.

, 25.00 ft., 21,900 sec.-ft.; 11 a.m., 25.29 ft., 23,200 sec.-ft. 

L 24.80 ft., 21,000 see.-ft.

24.34 ft., 19,100 sec.-ft.; 10 a.m., 24.62 ft., 20,200 sec.-ft. 

, 24.41 ft., 19,400 sec.-ft. 

, 24.17 ft., 18,400 sec.-ft.

23.81 ft., 16,900 sec.-ft.; 2 p.m., 24.00 ft., 17,700 sec.-ft.;

24.10 ft., 18,100 sec.-ft.; 9 p.m., 23.87 ft., 17,200 sec.-ft.; 

, 23.77 ft., 16,800 sec.-ft.

23.80 ft., 16,900 sec.-ft.; 10 a.m., 23.85 ft., 17,100 aec.ft.

Spokane River at Long Lake, Wash.

Location.- Lat. 47°50', long. 117°50', in SWj aec. 13, T. 27 N., R. 39 E., at Long

Lake power plant, 12 miles north of Reardon. Datum of gage is 1,300.00 feet above

mean sea level, subject to correction to datum of 1929. 

Drainage area.- 6,100 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation unstable, affected by backwater. Daily

discharges computed from records of power generation. 

Maxima.- May-June 1948: Discharge, 49,400 second-feet 11 p.m. May 24 (gage height,

78.66 feet).

1939 to April 1948: Discharge, 41,800 second-feet May 15, 1946 (gage height,

76.15 feet). 

Remarks.- Water diverted above station for irrigation. Plow affected considerably

by power regulation at Long Lake and by Coeur d'Alene Lake. Figures of discharge

not adjusted for change in contents of reservoirs. Capacity of Coeur d'Alene Lake

between elevations 2,120 and 2,140 feet (lake gage datum), 889,000 acre-feet.

Capacity of Long Lake between elevations 1,512 and 1,531 feet, 79,600 acre-feet.

Records of discharge furnished by Washington Water Pover Co.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

36,100

30,300

18,400

25,200

25,800

25,600

27,300

34,200

30,800

26,300

June

41,600

40,600

39,900

38,300

39,400

37,200

29,900

32,100

31,800

31,000

July

5,350

4,630

4,100

1,560

3,850

3,570

4,290

4,410

4,250

4,760

Day

11

12

13

14

15

16

17

18

19

M

May

28,200

29,600

30,000

31,400

35,300

32,000

26,400

28,600

29,400

32,100

June

28,400

30,900

28,800

25,800

22,900

23,000

22,600

23,300

26,600

24,100

July

2,410

5,080

5,080

4,700

4,940

4,310

3,920

1,960

3,830

3,730

Day 2l'

22

23

24

25

26

2V

28

29

30

31

Runoff, in inches ............................................................................................................................

May

31,300

36,900

38,300

45,600

47,300

42,800

42,400

42., 100

42,500

43,300

43,600

33,520

6.34

June

16,900

16,300

15,900

16,900

13,900

18,000

16,400

13,400

13,400

10,300

25,650

4.69

July

4,270

5,280

4,310

5,140

2,860

4,370

4,440

4,390

4,680

6,270

5,780

4,275

0.81
SPOKANE RIVER BASIN 139

St. Joe River at Calder, Idaho

Location.- Lat. 47°16', long. 116°11', in sec. 3, T. 45 N., R. 2 E., 150 feet southwest 

of Chicago, Milwaukee, St. Paul & Pacific Railway station at Calder. Datum of gage 

is 2,100 feet above mean sea level, referenced to original elevation of bench mark 

"2188 1911 20" (U. S. Geol. Survey Bull. 567). Bench mark has since been moved; 

revised elevation about 0.86 foot higher.

Drainage area.- 1,080 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.-^"Stage-dlscharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 23,700 second-feet 6 a.m. May 28 (gage height, 

89.04 feet).

1911-12, 1920 to April 1948: Discharge, 53,000 second-feet Dec. 23, 1933 (gage 

height, 92.5 feet), computed on basis of slope between gages downstream; maximum 

gage height, 93.1 feet Apr. 18, 1938, from floodraark.

Remarks.- Ho diversion above station. Water-stage recorder graph furnished by Washington Water Power Co.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

7,370

6,480

6,270

6,880

6,400

7,370

11,200

11,400

9,600

8,300

June

14,700

14,300

14,400

14,200

12,500

11,300

10,900

10,400

9,650

9,080

July

2,590

2,460

2,330

2,230

2,120

2,010

2,000

1,910

1,800

1,740

Day

11

12

13

14

15

16

17

18

19

20

May

7,730

8,270

11,OOO

11,600

9,570

10,500

13,400

14,800

14,000

17,400

June

8,710

7,520

6,800

6,200

5,680

5,510

5,170

4,750

4,410

4,150

July

1,680

1,620

1,540

1,480

1,420

1,390

1,340

1,320

1,530

2,100

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches ............................................................................................................................

May

19,500

21,100

19,000

19,300

20,700

21,100

21,900

22,600

20,600

17,200

15,800

14.41

June

4,160

3,900

3,640

3,450

3,350

3,200

3,100

2,940

2,800

2,720

7,120

7.36

July

1,600

1,370

1,280

1,240

1,180

1,120

1,180

1,980

2,150

1,650

1,440

1.82

Gage height, in feet, and discharge, in second-feet, at indicated time, 194S

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

86.73 

86.85 

86.86 

86.62 

86.85 

87.01

13,100 

13*, 600 

13,600 

13,500 

13,600 

14,200

May 23

88.13 

88.04 

88.01 

88.06 

88.14 

88.18

M,

88.52 

88.53 

88.52 

88.39

88.09

Ju

87.19

87.03 

86.96

86.86

19,200 

18,800 

18,600 

18,800 

19,200 

19,400

iy29

21,100 

21,200 

21,100 

20,400

19,000

ne4

14,800

14,200 

13,900

13,500

June 10

85.81 

85.78 

85.57 

85.45 

85.43 

85.42

9,660 

9,570 

8,970 

8,640 

8,590 

8,560

June 16

84.15 

84.15 

84.09 

84.06 

84.08 

84.11

5,580 

5,580 

5,470 

5,410 

5,450 

5,510

height | Discharge

May 18

87.19 

87.26 

87.24 

87.16 

87.07 

87.01

15,000 

15,200 

15,200 

14,800 

14,500 

14,200

May 24

88.20 

88.17 

88.13 

88.05 

88.15 

88.39

M

87.83

87.51 

87.49 

87.53

Ju

86.78 

86.69 

86.57 

86.49

86.47

19,500 

19,400 

19,200 

18,800 

19,200 

20,400

iy30

17,700

16,300 

16,200 

16,400

ne5

13,200 

12,800 

12,300 

12,000

11,900

June 11

85.47 

85.55 

85.45 

85.51 

85.47 

85.37

8,700 

8,910 

8,640 

8,800 

8,700 

8,430

June 17

84.05 

83.96 

83.91 

83.86 

83.82 

83.81

5,390 

 5,230 

5,140 

5,050 

4,970 

4,960

Gage 

height Discharge

May 19

86.95 

86.89 

86.82 

86.82 

86.99 

87.31

Mi

88.53 

88.54 

88.44 

88.32 

88.38 

88.53

14,000 

13,800 

13,500 

13,500 

14,200 

15,400

iy25

21, "200 

21,200 

20,700 

20,100 

20,400 

21,200

May 31

87.57

87.37 

87.27

87.30

16,500

15,600 

15,200

15,400

June 6

86.42 

86.34 

86.23 

86.17 

86.25 

86.33

11,700 

11,400 

11,100 

10,800 

11,100 

11,400

June 12

85.21 

85.08 

84.99 

84.89 

84.85 

84.80

7,980 

7,660 

7,440 

7,200 

7,100 

6,990

June 18

83.78 

83.74 

83.68 

83.64 

83.61 

83.60

4,900 

4,840 

4,730 

4,660 

4,610 

4,600

Gage 

height Discharge

May 20

87.61 

87.73 

87.74 

87.76 

87.91 

88.13

16,800 

17,300 

17,400 

17,400 

18,200 

19,200

May 26

88.64 

88.60 

88.48 

88.36 

88.44 

88.62

21,700 

21,500 

20,900 

20,300 

20,700 

21,600

Junel

87.27 

87.21 

87.13 

87.05 

87.05 

87.12

Ju

86.31 

86.23 

86.14 

86.08 

86.17 

86.23

15,200 

15,000 

14,600 

14,300 

14,300 

14,600

ne7

11,300 

11,000 

10,700 

10,500 

10,800 

11,000

June 13

84.74 

84.68 

84.68 

84.70 

84.74 

84.69

6,850 

6,720 

6,720 

6,770 

6,850 

6,740

June 19

83.56 

83.53 

83.49 

83.46 

83.41 

83.39

4,530 

4,480 

4,410 

4,360 

4,280 

4,250

^[Discharge

May 21

88.31 

88.31 

88.19 

88.06 

88.10 

88.37

20,000 

20,000 

19,400 

18»800 

19,000 

20,400

May 27

88.74 

88.73 

88.62 

88.53 

88.66 

88.90

Ju

87.14 

87.10 

87.02 

86.95 

87.01 

87.08

Ju

86.19 

86.09 

85.97 

85.90 

85.95 

85.97

22,200 

22,200 

21,600 

21,200 

21,800 

23,000

ne2

14,700 

14,500 

14,200 

13,900 

14,200 

14,400

ne8

10,900 

10,500 

10,200 

9,950 

10,100 

10,200

June 14

84.58

84.42 

84.36

84.30

6,480

6,140 

6,020

5,900

June 20

83.37 

83.34 

83.33 

83.29 

83.26 

83.27

4,230 

4,190 

4,170 

4,110 

4,060 

4,070

Gage 

height Discharge

May 22

88.57 

88.68 

88.64 

88.53 

88.39 

88.23

21,400 

21,900 

21,700 

21,200 

20,400 

19,600

May 28

89.03 

89.03 

88.89 

88.70 

88.59 

88.53

23,600 

23,600 

23,000 

22,000 

21,400 

21,200

June 3

87.08 

87.04 

87.02 

87.03 

87.11 

87.22

14,400 

14,200 

14,200 

14,200 

14,500 

15,000

June 9

85.94 

85.85 

85.74 

85.67 

85.72 

85.74

Ju

84.20 

84.15 

84.15 

84.16 

84.16

10,100 

9,800 

9,480 

9,280 

9,420 

9,480

ne!5

5,700 

5,600 

5,600 

5,620 

5,620

June 21

83.30 

83.37 

83.38 

83.33 

83.31 

83.27

4,120 

4,230 

4,250 

4,170 

4,140 

4,070

Supplemental record.- May 28, 6 a.m. 

824933 0-49-11

89.04 ft., 23,700 sec.-ft.
140 FLOODS OF MAY-JOKE 1948 IN COLOMBIA RIVER BASIN

St. Maries River at Lotus, Idaho

Location.- Lat. 47°14'40", long. 116 0 37'30", in sec. 17, T. 45 N., R. 2 W., 1 mile

 northwest of Lotus, 1 mile downstream from Carlton Creek, and 5f miles southwest 

of St. Maries. Datum of gage is 2,140.19 feet above mean sea level, referenced 

to bench mark "U. S. G. S. 2155 1911 35" (0. S. Geol. Survey Bull. 567, p. 45).

Drainage area.- 437 square miles.

Gage height record.- Staff gage read once daily except May 29, when there was no 

gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements

 below 2,410 second-feet and extended to peak stage on basis of slope-area measurement.

Backwater from log Jam July 20-29. Discharge for periods of no gage-height 

record or backwater computed on basis of records for Potlatch Creek at Kendrick 

and observer's notes.

Shifting-control method used June 22 to July 19, July 30, 31.

Maxima.- May-June 1948: Discharge, 7,500 second-feet May 24 (gage height, about 6.5 

feet), by slope-area method.

1911-12, 1920 to April 1948: Discharge observed, 23,800 second-feet Dec. 22, 

23, 1933 (gage height, 12.1 feet), from rating curve extended above 4,000 secondfeet by logarithmic plotting.

Remarks.- No diversion above station. Staff-gage readings and one discharge measurement furnished by Washington Water Power Co. *

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,940

1,700

1,530

2,000

1,810

1,890

2,490

3,630

4,300

3,850

June

2,120

1,840

1,860

2,060

1,750

1,510

1,290

1,180

1,060

951

July

369

340

317

301

363

312

296

290

259

259

Day

11

1?,

13

14

15

16

17

18

19

20

May

3,090

2,890

2,950

2,790

2,360

2,290

2,250

2,210

2,010

2,350

June

1,100

1,020

838

884

732

980

847

666

641

587

July

245

221

207

194

178

186

182

178

212

300

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .......................... .......

Runoff, in inches .................................. .......... .. ... . .... ..... .....................................................

May

2,550

2,780

5,510

6,410

4,350

3,460

3,060

2,760

4,500

3,140

2,420

2,944

7.77

June

682

666

595

557

572

542

521

438

406

388

-

976

2.49

July

400

210

170

150

140

125

135

440

1,000

723

506

297

0.78

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

l:50p

l:45p

2:10p

3:30p

2:25p

l:25p

2:10p

10

2:50

2:05p

Gage 

height

May

4.13

May

4.10

May

3.94

May

4.20

May

4.34

May

4.49

May

5.80

May

6.26

6.00

May

5.33

Discharge

17

2,250

18

2,210

19

2,010

20

2,350

21

2,550

22

2,780

23

5,510

24

6,780

6,050

25

4,350

Hour

l:20p

1:15 P

6 p

l:10p

3:05p

2:10p

12:40p

2:25p

3:40p

l:50p

2:40p

Gage 

height Discharge

May 26

4.90 3,460

May 27

4.67

4.60

3,060

2,950

May 28

4.48 2,760

May 30

4.72 3,140

May 31

4.25 2,420

June 1

4.02

4.03

4.01

2,110

2,120

2,090

June 2

3.80 1,840

June 3

3.82 1,860

Hour

l:40p

2p

2:10p

2:30p

2:40p

2:10p

l:50p

3:05p

3:10p

Gage 

height Discharge

June 4

3.98 2,060

June 5

3.72

Jur

3.50

Jur

3.29

Jur

3.18

Jur

3.06

1,750

le 6

1,510

le 7

1,290

le 8

1,180

le 9

1,060

June 10

2.95 951

June 11

3.10 1,100

June 12

3.02 1,020

Hour

2:45p

3:10p

2:10p

2:10p

l:45p

3:15p

4:45p

2:20p

2 : 30p

l:50p

2:15p

Gage 

height Discharge

June 13

2.83 838

June 14

2.88

June

2.71

June

2.98

June

2.84

2.83

2.80

884

15

732

16

980

17

847

838

810

June 18

2.63

June

2.60

666

19

641

June 20

2.53 587

June 21

2.65 682
SPOKANE RIVKR BASIN 141

Hayden Creek near Hayden Lake, Idaho

Location.- Lat. 47'49'20", long. 116°39'20", in NWfcSWi sec. 25, T. 52 N., R. 3 W., 

0.35 mile downstream from confluence of North Pork and East Pork, 2 miles upstream 

from mouth, and 7 miles northeast of Hayden Lake post office. Prior to Apr. 17, 

1948, at site 1.3 miles downstream at different datum.

Drainage area.- 22.0 square miles; 26.0 square miles at former site.

Sage-height record. - Staff gage read once or twice daily except May 1, 2, 8, 9, 16, 22, 

23, 25, 30, June 6, 7, 13, 20, 21, 27, July 3-5, 11, 18, 25, when there was no 

gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

300 second-feet and extended to peak stage of Apr. 17, 1948, on basis of slope-area 

measurement. Discharge for periods of no gage-height record interpolated or computed on basis of records for St. Maries River at Lotus and Potlatch Creek near 

Kendrick.

Maxima.- May-June 1948: Daily discharge, 320 second-feet May 9.

1946 to April 1948: Discharge, 680 second-feet Apr. 17, 1948 (gage height, 4.38 

feet, present site and datum, from floodmark), by slope-area method.

Remarks . - No diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

110

98

87

90

92

136

207

260

320

256

June

71

66

58

56

.51

47

43

40

39

35

July

25

23

22

21

20

20

26

22

19

18

Day

11

1?l

13

14

15

16

17

18

19

20

May

209

186

222

212

170

173

178

155

129

136

June

33

35

31

29

28

30

34

31

28

27

July

18

17

17

16

15

14

14

13

13

26

Day

21

22

23

24

«5

26

27

28

29

30

31

Monthly mean discharge, in second-feet...................................................................... ..... ...

Runoff, in inches ........................................... .......................... ..................................................

May

142

160

190

217

230

207

170

142

122

100

81

167

8.77

June

33

32

31

35

35

32

31

30

28

26

-

37.5

1.90

July

22

20

18

17

16

14

14

35

39

31

27

20.4

1.07

Hayden Lake at Hayden Lake, Idaho

Location.- Lat. 47*46', long. 116°45', in sec. 18, T. 51 N., R. 3 W., at Avondale and

 Hayden Lake pumping plants, a quarter of a mile north of Bozanta Tavern. Datum of

gage is 2,200.21 feet above mean sea level, datum of 1929. 

Gage-height record.- Staff gage read once daily. 

Maxima.- May-June 1948; Gage height, 38.19 feet May 30, from floodmark.

 1920 to April 1948: Gage height, 40.41 feet Apr. 30 to May 18, 1921.

Maximum stage in 1913 exceeded that of 1948, from information t>y local residents. 

Remarks.- Water is pumped from lake for irrigation and domestic supply.

Mean gage height, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

35.84

35.88

35.89

35.96

36.00

36.04

36.16

36.36

36.62

36.90

June

38.12

38.02

37.98

37.96

37.94

37.82

37.78

37.74

37.72

37.64

July

36.74

36.72

36.64

36.62

36.58

36.54

36.54

36.50

36.44

36.42

Day

11

12

13

14

15

16

17

18

19

20

May

36.94

37.04

37.34

37.38

37.40

37.44

37.48

37.52

37.60

37.62

June

37.62

37.56

37.50

37.42

37.34

37.32

37.34

37.30

37.24

37.22

July

36.36

36.34

36.24

36.14

36.12

36.08

36.02

35.96

35.94

35.92

Day

21

22

23

24

25

26

27

28

29

30

31

May

37.62

37.64

37.72

37.86

37.96

38.02

38.06

38.08

38.14

38.16

38.14

June

37.14

37.10

37.08

37.04

37.04

37.00

36.96

36.92

36.88

36.84

July

35,89

35.84

35.80

35.76

35.72

35.70

35.68

35.66

35.66

35.64

35.64
142 FLOODS OP HAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Latah Creek at Spokane, Wash.

Location.- Lat. 47°38'50", long. 117°26'58", In S¥£ see. 24, T. 25 N., R. 42 E. f at 

Spokane, 1 mile above mouth.

Jralnage area.- 630 square miles.

Gage-height record.- Graph based on twice-daily gage readings and recorder graphs for 

nearby streams May 16 to June 21j mean of twice-daily gage readings May 1-15, 

June 22 to July 31.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

1,700 second-feet and extended to peak stage on basis of slope-area and contractedopening measurements. Gage heights used to hundredths May 17 to June 21} half-tenths 

below and tenths above 8.3 feet May 1-16, June 22 to July 31. Shifting-control method 

used May 1-23.

Maxima.- May-June 1948: Discharge, 11,900 second-feet about 1 a.m. May 24 Igage height, 

IS.73 feet, from floodmarks).

Remarks.- Diversions for Irrigation are probably small percentage of flood discharge.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

395

335

296

540

490

440

570

1,180

5,370

4,040

June

628

503

478

512

482

398

325

273

241

466

July

118

102

98

93

98

128

118

171

112

102

Day

11

1?

13

14

IB

16

17

18

19

20

May

2,380

2,180

3,280

1,730

1,000

700

545

476

441

1,110

June

252

659

390

322

263

328

476

367

256

393

July

88

84

76

72

64

60

57

54

54

57

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ... ..... .............................................. _ ......

Runoff, in inches ............................................................................................................................

May

1,590

1,550

8,020

9,570

3,810

1,770

1,080

736

1,630

1,580

826

1,925

3.52

June

1,270

395

315

260

465

296

227

184

158

134

391

0.69

July

54

50

46

46

50

46

44

50

57

57

112

78.0

0.14

Gage height, in feet, and discharge, in second-feet, at indicated time,

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

9.87 

9.80 

9.73 

9.67 

9.62 

9.57

C82 

561 

540 

525 

512 

500

May 23

15.10 

16.00 

16.95 

17.85 

18.50 

18.72

5,110 

6,280 

7,700 

9,690 

11,300 

11,900

May 29

10.95 

11.57 

12.45 

13.43 

13.61 

13.40

Ju

10.28 

10.26 

10.28 

10.31 

10.30 

10.29

718 

990 

1,540 

2,410 

2,600 

2,380

ne4

510 

505 

510 

518 

515 

512

June 10

10.32 

10.85 

10.50 

9.88 

9.40 

9.22

528 

682 

570 

411 

315 

282

June 16

9.01 

9.01 

9.25 

9.90 

9.98 

9.99

245 

245 

287 

415 

435 

458

Gage 

height Discharge

May 18

9.53 

9.50 

9.47 

9.45 

9.42 

9.39

490 

482 

475 

470 

462 

455

May 24

18.60 

18.31 

17.88 

17.38 

16.85 

16.25

M,

13.04 

12.71 

12.40 

12.12 

11.89 

11.67

Ju

10.27 

10.22 

10.18 

10.12 

10.07 

10.01

11,600 

10,800 

9,760 

8,620 

7,490 

6,330

>y30

2,030 

1,740 

1,500 

1,310 

1,170 

1,040

ne5

508 

495 

485 

470 

458 

442

June 11

9.12 

9.03 

9.00 

8.98 

8.97 

9.17

264 

2*8 

243 

240 

238 

272

June 17

9.98 

10.03 

10.19 

10.30 

10.30 

10.13

435 

448 

488 

515 

515 

472

Gage 

height Discharge

May 19

9.36 

9.32 

9.30 

9.28 

9.31 

9.46

448 

442 

432 

428 

435 

472

May 25

15.56 

14.89 

14.37 

14.00 

13.68 

13.36

5,150 

4,170 

3,480 

3,040 

2,680 

2,340

May 31

11.48 

11.28 

11.17 

11.07 

10.98 

10.89

Ju

9.95 

9.87 

9.81 

9.74 

9.68 

9.62

Ju

10.75 

11.36 

11.11 

10. 81 

10.53 

10.28

945 

851 

803 

763 

728 

696

ne6

428 

409 

397 

383 

371 

359

ne!2

648 

887 

779 

668 

579 

510

June 18

9.92 

9.74 

9.62 

9.51 

9.41 

9.31

420 

383 

359 

337 

317 

298

Gage 

height Discharge

May 20

10.00 

10.99 

11.30 

11.50 

11.63 

11.74

621 

1,040 

1,220 

1,340 

1,430 

1,510

May 26

13.12 

12.88 

12.70 

12.52 

12.34 

12.17

2,100 

1,880 

1,730 

1,590 

1,460 

1,340

June 1

10.82 

10.76 

10.69 

10.63 

10.55 

10.46

672 

651 

627 

609 

585 

558

June 7

9.57 

9.50 

9.44 

9.39 

9.34 

9.30

349 

335 

323 

313 

304 

296

June 13

10.02 

9.81 

9.67 

9.58 

9.57 

9.57

445 

397 

369 

351 

349 

349

June 19

9.23 

9.14 

9.04 

8.95 

8.94 

8.93

283 

26T 

250 

235 

233 

232

Gage 

height Discharge

May 21

11.86 

11.93 

11.95 

11.94 

11.80 

11.50

1,590 

1,650 

1,670 

1,660 

1,550 

1,340

May 27

11.99 

11.83 

11.68 

11.60 

11.48 

11.34

1,230 

1,130 

1,050 

1,000 

945 

878

June 2

10.36 

10.28 

10.23 

10.18 

10.15 

10.14

Ju

9.25 

9.22 

9.19 

9.12 

9.07 

9.03

Ju

9.55 

9.55 

9.49 

9.36

a. 26

9.20

530 

510 

498 

485 

478 

475

ne8

287 

282 

276 

264 

255 

248

ne 14

345 

345 

333 

307 

289 

278

June 20

8.94 

8.98 

9.11 

9.42 

10.65 

11.85

233 

240 

262 

319 

615 

1,150

Gage 

height

M

11.16 

10.81 

10.64 

10.30 

13.20 

14.20

Discharge

iy22

1,130 

945 

864 

724 

2,890 

4,140

May 28

11.20 

11.05 

10.95 

10.87 

10.81 

10.79

815 

755 

718 

690 

668 

662

June 3

10.12 

10.12 

10.11 

10.11 

10.24 

10.29

470 

470 

468 

468 

500 

512

June 9

8.99 

8.97 

8.94 

8.89 

8.93 

9.32

241 

238 

233 

226 

232 

300

June 15

9.19 

9.18 

9.13 

9.06 

9.03 

9.02

276 

274 

265 

253 

248 

246

June 21

-12.63 

12.98 

12.58 

11.35 

10.65 

10.35

L,670 

1,970 

1,630 

882 

615 

528

Supplemental record.- May 24, 1 a.m., 18.73 ft., 11,900 sec.-ft.
SPOKAME RIVER BASIN 143

Little Spokane River near Hartford, Wash.

Location.- Lat. 47°46'47", long. 117 0 29'36", in NW£ sec. 3, T. 26 N., R. 42 E., 3 miles

upstream from mouth and 4 miles west of Hartford. 

Drainage area.- 663 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Gage heights used to hundredths May 17 to June 21; half-tenths May 1-16, June 22

to July 31. 

Maximum.- May-June 1948: Discharge, 2,170 second-feet 6 to 8 p.m. May 24 (gage height,

7.12 feet.

Remarks.- Small diversions for domestic use are probably small percentage of flood 

Ischarge.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,070

1,040

1,020

1,110

1,340

1,250

1,300

1,340

1,490

1,600

June

1,240

1,150

1,110

1,110

1,130

1,090

1,020

964

927

898

July

779

762

730

700

700

746

746

746

715

672

Day

11

12

13

14

15

16

17

18

19

20

May

1,540

1,490

1,600

1,850

1,660

1,540

1,460

1,380

1,330

1,280

June

939

1,070

1,090

993

941

934

1,040

1,060

982

936

July

646

634

610

588

568

558

540

532

523

532

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ....... . . ... ..... .. ...........

Runoff, in inches ............................................................................................................................

May

1,240

1,220

1,380

1,980

1,790

1,490

1,390

1,300

1,340

1,560

1,430

1,413

2.46

June

929

1,020

1,020

963

963

940

916

873

853

814

997

1.68

July

523

516

501

494

488

481

469

488

501

488

481

595

1.04

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.60 

6.58 

6.57 

6.56 

6.54 

6.52

1,490 

1,470 

1,460 

1,450 

1,430 

1,410

May 23

6.35 

6.41 

6.48 

6.54 

6.61 

6.73

1,250 

1,300 

1,370 

1,430 

1,500 

1,640

May 29

6.40 

6.42 

6.43 

6.45 

6.51 

6.59

Ju

6.14 

6.14 

6.15 

 6.16 

6.18 

6.18

1,300 

1,310 

1,320 

1,340 

1,400 

1,480

ne 4

1,100 

1,100 

1,110 

1,120 

1,130 

1,130

June 10

5.77 

5.77 

5.76 

5.76 

5.74, 

5.73

903 

903 

899 

899 

890 

886

June 16

5.78 

5.78 

5.82 

5.87 

5.90 

5.98

907 

907 

925 

949 

963 

1,000

Gage 

height Discharge

May 18

6.51 

6.49 

6.48 

6.48 

6.47 

6.45

1,400 

1,380 

1,370 

1,370 

1,360 

1,340

May 24

6.86 

6.94 

7.00 

7.09 

7-. 12 

7.07

M

6.67 

6.68 

6.66 

6.65 

6.68 

6.68

Ju

6.18 

6.18 

6.19 

6.19 

6.19 

6.20

1,800 

1,910 

1,990 

2,120 

2,170 

2,100

iy30

1,570 

1,580 

1,560 

1,540 

1,580 

1,580

ne 5

1,130 

1,130 

1,130 

1,130 

1,130 

1,140

June 11

5.77 

5.79 

5.84 

5.91 

5.92 

5.97

903 

912 

935 

968 

973 

999

June 17

6.08 

6.10 

6.06 

6.03 

6.03 

6.07

1,060 

1,070 

1,050 

1,030 

1,030 

1,060

Gage 

height Discharge

May 19

6.44 

6.44 

6.44 

6.44 

6.43 

6.42

1,330 

1,330 

' 1,330 

1,330 

1,320 

1,310

May 25

7.00 

6.89 

6.81 

6.77 

6.73 

6.68

1,990 

1,840 

1,730 

1,680 

1,640 

1,580

May 31

6.66 

6.59 

6.52 

6.46 

6.43 

6.41

1,560 

1,480 

1,410 

1,350 

1,320 

1,300

June 6

6.18 

6.16 

8.13 

6.11 

6.07 

6.06

Ju

5.98 

6.00 

6.12 

6.20 

6.18 

6.15

1,130 

1,110 

1,090 

1,080 

1,060 

1,050

ne!2

1,000 

1,020 

1,090 

1,140 

1,130 

1,110

June 18

6.10 

6.10 

6.09 

6.07 

6.03 

6.00

1,070 

1,070 

1,070 

1,060 

1,030 

1,020

Gage 

height Discharge

May 20

6.40 

6.39 

6.38 

6.38 

6.37 

6.36

1,300 

1,290 

1,280 

1,280 

1,270 

1,260

May 26

6.64 

8.62 

6.59 

6.58 

6.57 

6.55

J\l

6.38 

6.36 

6.33 

6.32 

6.30 

6.28

Ju

6.04 

6.03 

6.00 

5.98 

5.97 

5.95

1,530 

1,510 

1,480 

1,470 

1,460 

1,440

me 1

1,280 

1,260 

1,240 

1,230 

1,210 

1,200

ne7

1,040 

1,030 

1,020 

1,000 

999 

989

June 13

6.14 

6.15 

6.15 

6.13 

6.10 

6.05

1,100 

1,110 

1,110 

1,090 

1,070 

1,040

June 19

5.98 

5.96 

5.93 

5.92 

5.89 

5.88

1,000 

994 

979 

973 

958 

954

Gage 

height Discharge

May 21

6.34 

6.33 

6.32 

6.32 

6.32 

6.33

1,250 

1,240 

1,230 

1,230 

1,230 

1,240

May 27

6.54 

6.52 

6.50 

6.48 

6.47 

6.46

1,430 

1,410 

1,390 

1,370 

1,360 

1,350

June 2

6.27 

6.25 

6.22 

6.19 

6.17 

6.16

Ju

5.93 

5.92 

5.90 

5.88 

5.87 

5.86

1,190 

1,180 

1,150 

1,130 

1,120 

1,110

ne8

979 

973 

963 

954 

949 

944

June 14

6.00 

5.97 

5.94 

5.93 

5.92 

5.91

1,020 

999 

984 

979 

973 

968

June 20

5.87 

5.85 

5.83 

5.83 

5.83 

5.82

949 

940 

930 

930 

930 

925

Gage 

height Discharge

May 22

6.31 

6.30 

6.31 

6.30 

6.30 

6.30

1,220 

1,210 

1,220 

1,210 

1,210 

1,210

May 28

6.45 

6.42 

6.40 

6.38 

6.37 

6.38

1,340 

1,310 

1,300 

1,280 

1,270 

1,280

June 3

6.15 

6.15 

6.15 

6.15 

6.15 

6.14

Jl

5.84 

5.83 

5.82 

5.82 

5.81 

5.78

1,110 

1,110 

1,110 

1,110 

1,110 

1,100

ne9

935 

930 

925 

925 

921 

907

June 15

5.90 

5.88 

5.85 

5.83 

5.81 

5.79

963 

954 

940 

930 

921 

912

June 21

5.81 

5.80 

5.81 

5.83 

5.86 

5.90

921 

916 

921 

930 

944 

963

Supplemental record.- May 24, 6 p.m., 7.12 ft., 2,170 sec.-ft.
144 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Okanogan River Basin

Osoyoos Lake near Orovllle, Wash. 

(International gaging station)

Location.- Lat. 48°59'15", long. 119°27'15", In lot 1, sec. 8, T. 40 N., R. 87 E., on

 west shore, 1 mile south of International boundary, and 3 miles north'of Orovllle. 

Datum of gage Is at mean sea level, U. S. Coast and Geodetic Survey datum of 1929. 

Drainage area.- 3,250 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Remarks.- Diversion In Canada for Irrigation. Elevation may occasionally be affected

 by dam at Zosel's mill In Orovllle and by backwater from Simllkameen River, a tributary to Okanogan River. Okanogan River subject to natural regulation In several 

lakes and to artificial regulation as an aid to navigation in Okanagan Lake. This 

station is one of the international gaging stations maintained by the United States 

under agreement with Canada.

Mean elevation*, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

11.59

11.63

11.66

11.71

11.70

11.75

11.77

11.78

11.75

11.76

June

16.60

16.26

15.88

15.57

15.29

15.05

14.88

14.75

14.65

14.61

July

12.34

12.22

12.13

12.06

12.01

11.98

12.02

12.06

12.10

12.14

Day

11

12

13

14

15

16

17

18

19

20

May

11.75

11.70

11.70

11.71

11.70

11.70

11.70

11.73

11.75

11.75

June

14.59

14.56

14.52

14.37

14.20

14.07

14.04

14.04

14.00

13.85

July

12.19

12.19

12.21

12.21

12.18

12.17

12.14

12.11

12.10

12.08

Day

21

22

23

24

25

26

27

28

29

30

31

May

11.80

11.88

12.01

12.21

12.57

13.12

13.77

14.61

15.59

16.40

16.73

June

13.72

13.59

13.47

13.32

13.15

13.00

12.85

12.71

12.60

12.48

July

12.07

12.05

12.04

12.00

11.99

11.97

12.01

11.99

11.96

11.96

11.98

* Add 900 feet to obtain elevation above mean sea level.
OKANOOAN RIVER BASIN 145

Okanogan River at Orovllle, Wash.

Location.- Lat. 48°56 I , long. US'SS', In SW£ sec. 27, T. 40 N., R. 27 E., In Orovllle, 

half a mile downstream from Tonasket Creek and l£ miles downstream from Osoyoos 

Lake. Auxiliary gage 0.4 mile downstream. Datum of gage Is 900 feet above mean sea 

level, datum of 1929.

Drainage area.- 3,320 square miles.

Gage-height "record.- Water-stage recorder graphs from base and auxiliary gages.

Discharge record.-""Computed by constant-fall method for periods of normal flow and by 

slope-area method for period of reverse flow. Stage-fall-discharge relations defined by current-meter measurements. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 3,480 second-feet 11 a.m. to noon June 2j gage 

height, 16.53 feet noon to 4 p.m. May 31 (backwater from SImllkameen River).

1942 to April 1948: Discharge, 2,230 second-feet May 17, 1946} gage height, 12.35 

feet June 1, 1945 (backwater from SImllkameen River).

Remarks.- Reverse flow May 25-30 caused by backwater from Similkameen River flowing 

Into Osoyoos Lake. Diversions in Canada for Irrigation.. Natural regulation In 

several large lakes and artificial regulation in Okanagan Lake as an aid to navigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

901

914

996

1,070

1,060

1,210

1,310

1,300

1,290

1,260

June

3,050

3,360

3,170

2,900

2,700

2,430

2,190

1,960

1,820

2,050

July

1,860

1,760

1,720

1,680

1,630

1,470

1,390

1,350

1,370

1,430

Day

11

12

13

14

15

16

17

18

19

20

May

1,380

1,410

1,380

1,390

1,390

1>390

1,360

1,340

1,340

1,270

June

2,040

2,160

2,360

2,620

2,410

2,410

2,230

2,200

2,450

2,560

July

1,480

1,490

1,500

1,580

1,600

1,580

1,570

1,570

1,540

1,460

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ......................................... . ..................................

Runoff, in inches ............................................................................................................................

May

1,110

1,030

1,190

1,160

0

-636

-1,050

-1,180

-1,900

-1,880

2,010

800

0-28

June

2,520

2,430

2,470

2,490

2,430

2,310

2,240

2,030

1,960

1,950

2,400

0.80

July

1,450

1,470

1,490

1,490

1,460

1,470

1,500

1,470

1,460

1,440

1,440

1,522

0.53

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

7.79 

7.78 

7.78 

7.78 

7.80 

7.82

1,380 

1,360 

1,360 

1,350 

1,350 

1,360

May 23

9.98 

10.16 

10.32 

10.47 

10.58 

10.66

M:

15.30 

15.48 

15.65 

15.80 

15.93 

16.07

Ju

14.71 

14.68 

14.64 

14.57 

14.53 

14.49

1,000 

1,060 

1,070 

1,120 

1,230 

1,200

iy29

ne 4

2,900 

2,930 

3,000 

2,850 

2,830 

2,820

June 10

14.09 

14.05 

14.00 

13.93 

13.92 

13.95

1,970 

2,030 

2,140 

2,120 

2,120 

2,060

June 16

12.67 

12.60 

12.59 

12.62 

12.71 

12.83

2,500 

2,460 

2,390 

2,400 

2,320 

2,260

Gage 

height Discharge

May 18

7.82 

7.82 

7.85 

7.83 

7.83 

7.83

1,360 

1,350 

1,380 

1,330 

1,310 

1,300

May 24

10.76 

10.89 

11.11 

11.24 

11.43 

11.67

M

16.18 

16.32 

16.41 

16.47 

16.52 

16.53

1,140 

1,080 

1,300 

1,280 

1,080 

924

iy30

June 5

14.43 

14.38 

14.33 

14.29 

14.29 

14.29

2,740 

2,780 

2,760 

2,650 

2,600 

2,550

June 11

13.98 

14.01 

14.02 

13.98 

13.95 

13.92

2,020 

2,020 

2,070 

2,020 

2,010 

2,120

June 17

12.89 

12.92 

12.98 

13.02 

13.06 

13.09

2,240 

2,260 

2,240 

2,200 

2,230 

2,140

Gage 

height Discharge

May 19

7.87 

7.87 

7.88 

7.87 

7.83 

7.82

1,350 

1,350 

1,370 

1,360 

1,300 

1,290

May 25

11.93 

12.20 

12.40 

12.52 

12.62 

12.73

M:

16.53 

16.51 

16.45 

16.35 

16.27 

16.17

iy31

1,480 

1,960 

2,240 

2,350 

2,700 

2,680

June 6

14.31 

14.28 

14.25 

14.22 

14.22 

14.22

2,500 

2,490 

2,480 

2,400 

2,350 

2,200

June 12

13.87 

13.82 

13.77 

13.74 

13.74 

13.75

2,100 

2,180 

2,210 

2,200 

2,160 

2,160

June 18

13.11 

13.12 

13.09 

13.05 

12.99 

12.92

2,150 

2,190 

2,180 

2,320 

2,240 

2,300

Gage 

height Discharge

May 20

7.83 

7.83 

7.83 

7.85 

7.88 

7.92

1,300 

1,300 

1,290 

1,270 

1,210 

1,210

May 26

12.87 

12.99 

1'3.10 

13.20 

13.30 

13.42

June 1

16.09 

16.01 

15.87 

15.76 

15.64 

15.56

Ju

14.24 

14.22 

14.20 

14.18 

14.18 

14.20

2,860 

3,060 

3,070 

3,160 

3,180 

3,260

ne7

2,260 

2,200 

2,250 

2,190 

2,120 

2,070

June 13

13.76 

13.72 

13.65 

13.55 

13.48 

13.37

2,200 

2,310 

2,430 

2,400 

2,500 

2,530

June 19

12. 83- 

12.73 

12.63 

12.54 

12.44 

12.35

2,360 

2,450 

2,440 

2,530 

2,510 

2,530

Gage 

height Discharge

May 21

7.97 

8.02 

8.09 

8.24 

8.45 

8.67

1,210 

1,200 

1,090 

1,040 

1,010 

1,030

May 27

13.55 

13.69 

13.82 

13.93 

14.05 

14.19

June 2

15.47 

15.38 

15.32 

15.23 

15.14 

15.08

Ju

14.23 

14.23 

14.22 

14.18 

14.20 

14.22

Ju

13.27 

13.15 

13.12 

13.03 

13.01 

12.99

3,310 

3,340 

3,480 

3,440 

3,350 

3,330

ne8

2,010 

2,010 

2,070 

1,820 

1,930 

1,830

ne!4

2,570 

2,610 

2,870 

2,570 

2,560 

2,550

June 20

12.26 

12.17 

12.10 

12.04 

11.98 

11.93

2,560 

2,610 

2,560 

2,530 

2,540 

2,580

Gage 

height

M

8.85 

9.00 

9.14 

9.32 

9.52 

9.77

Discharge

jy22

1,050 

1,110 

1,070 

1,030 

942 

978

May 28

14.35 

14.51 

14.65 

14.80 

14.93 

15.12

Ju

15.02 

14.94 

14.86 

14.79 

14.76 

14.73

Ju

14.23 

14.23 

14.18 

14.13 

14.10 

14.09

ne3

3,320 

3,290 

3,140 

3,060 

3,050 

2,960

ne9

1,740 

1,840 

1,820 

1,810 

1,900 

1,800

June 15

12.95 

12.88 

12.81 

12.76 

12.75 

12.75

2,490 

2,510 

2,510 

2,500 

3,490 

2,530

June 21

11.88 

11.79 

11.73 

11.69 

11.68 

11.68

2,630 

2,520 

2,520 

2,510 

2,460 

2,440

Supplemental record.- June 2, 11 a.m., 15.32 ft., 3,480 sec.-ft.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Okanogan River near Tonasket, Wash. 

(International gaging station)

Location.- Lat. 48°38'00", long. 119°27'50", in lot 3, sec. 8, T. 36 N., R. 27 E., 1,000

feet upstream from Chewiliken Creek and 65 miles south of Tonasket. 

Drainage area.- 7,250 square miles; 2,340 square miles affected by storage in Okanagon

Lake. 

Gage-height record.- Water-stage recorder graph except for period 11 p.m. May 30 to

10 p.m. May 31 for which graph was drawn based on floodmark and two water-level

observations. 

Discharge record.- Rating curve defined by current-meter measurements. Gage heights

used to hiindredths May 17 to June 21; tenths May 1-16 and June 22 to July 31. 

Maxima.- May-June 1948: Discharge, 40,900 second-feet 11 a.m. to noon May 31 (gage

Height, 21.79 feet).

1911-25, 1929 to April 1948: Discharge recorded, 25,400 second-feet Apr. 27, 1934

(gage height, 18.3 feet). 

Remarks.- Plow subject to natural regulation by several lakes and to some regulation by

Okanagan Lake. Many diversions above station for irrigation.

This station is one of the international gaging stations maintained by the United

States under agreement with Canada. Records provisional, subject to revision.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,990

2,880

2,880

2,990

3,110

3,110

3,350

3,980

4,260

4,540

June

37,600

32,900

29,400

27,600

26,300

25,600

25,400

25,500

25,800

25,400

July

7,770

7,230

6,690

6,150

5,980

5,810

5,640

5,980

6,330

5,810

Day

11

12

13

14

15

16

17

18

19

20

May

4,840

5,470

5,980

6,330

6,150

6,150

6,240

6,620

7,060

7,190

June

24,700

24,100

23,000

21,200

19,700

19,000

19,600

20,500

19,700

17,800

July

5,470

5,310

5,150

4,840

4,690

4,540

4,400

4,260

4,260

4,840

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet

Runoff, in inches ................... ........................................................................................................

May

7,900

10,800

12,700

14,400

16,900

20,400

23,200

27,000

32,400

38,000

40,500

10,980

1.75

June

16,600

16,000

15,000

13,500

12,300

11,500

10,600

9,640

9,070

8,500

20,450

3.15

July

4,990

4,540

4,400

4,120

4,120

3,850

3,850

3,720

3,720

3,720

3,590

5,020

0.80

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

h

3 

O 

ffi

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

9.69 

9.75 

9.77 

9.77 

9.79 

9.82

6,130 

6,240 

6,280 

6,280 

6,310 

6,370

May 23

12.75 

12.91 

13.08 

13.23 

13.38 

13.51

12,000 

12,400 

12,700 

13,100 

13,400 

13,700

May 29

19.08 

19.34 

19.66 

19.88 

20.07 

20.26

30,500 

31,400 

32,600 

33,400 

34,100 

34,700

June 4

18.36 

18.30 

18.26 

18.24- 

18.19 

18.13

27,900 

27,700 

27,600 

27,500 

27,400 

27,200

June 10

17.70 

17.65 

17.64 

17.58 

17.50 

17.45

25,700 

25,600 

25,500 

25,300 

25,100 

24,900

June 16

15.60 

15.56 

15.54 

15.50 

15.47 

15.47

19,300 

19,100 

19,000 

19,000 

18,900 

18,900

Gage 

height Discharge

May 18

9.87 

9.91 

9.96 

10.01 

10.06 

10.09

6,460 

6,530 

6,620 

6,710 

6,800 

6,850

May 24

13.60 

13.69 

13.78 

13.86 

13.99 

14.12

M

20.55 

20.84 

21.14 

21.34 

21.46 

21.60

14,000 

14,200 

14,400 

14,600 

14,900 

15 , 200

iy30

35,900 

37,000 

38,200 

39,000 

39,500 

40,100

June 5

18.05 

18.00 

17.94 

17.84 

17.76 

17.70

26,900 

26,700 

26,500 

26,200 

25,900 

25,700

June 11

17.40 

17.34 

17.36 

17.39 

17.40 

17.39

24,800 

24,600 

24,600 

24,700 

24,800 

24,700

June 17

15.50 

15.60 

15.67 

15.74 

15.80 

15.86

19,000 

19,300 

19,500 

19,700 

19,800 

20,000

Gage 

height Discharge

May 19

10.12 

10.18 

10.22 

10.26 

10.28 

10.28

6,910 

7,010 

7,090 

7,160 

7,190 

7,190

May 25

14.26 

14.45 

14.64 

14.99 

15.25 

15.47

Mi

21.70 

21.77 

21.79 

21.73 

21.64 

21.50

Jt

17.67 

17.66 

17.66 

17.68 

17.64 

17.62

15,600 

16,100 

16,600 

17,500 

18,300 

18,900

iy31

40,500 

40,800 

40,900 

40,600 

40,200 

39,700

ne6

25,600 

25,600 

25,600 

25,700 

25,500 

25,500

June 12

17.36 

17.30 

17.24 

17.16 

17.06 

17.00

24,600 

24,400 

24,200 

24,000 

23,800 

23,500

June 18

15.93 

15.97 

16.04 

16.07 

16.06 

16.04

20,200 

20,300 

20,500 

20,600 

20,600 

20,500

Gage 

height Discharge

May 20

10.27 

10.27 

10.28 

10.28 

10.28 

10.30

7,180 

7,180 

7,190 

7,190 

7,190 

7,230

May 26

15.66 

15.84 

16.00 

16.13 

16.28 

16.45

19,400 

20,000 

20,400 

20,800 

21,300 

21,800

June 1

21.37 

21.19 

21.00 

20.79 

20.60 

20.37

39,200 

38 , 400 

37,700 

36,900 

36,100 

35,200

June 7

17.60 

17.61 

17.62 

17.62 

17.60 

17.59

25,400 

25,400 

25,500 

25,500 

25,400 

25,400

June 13

16.95 

16.92 

16.90 

16.86 

16.80 

16.71

23,300 

23,200 

23,200 

23,000 

22,800 

22,600

June 19

15.99 

15.91 

15.80 

15.68 

15.56 

15.46

20,400 

20,200 

19,800 

19,500 

19,100 

18,900

Gage 

height Discharge

May 21

10.36 

10.43 

10.55 

10.67 

11.20 

11.52

7,340 

7,460 

7,680 

7,900 

8,880 

9,490

May 27

16.60 

16.74 

16.90 

17.06 

17.25 

17.42

Ju

20.14 

19.94 

19.74 

19.56 

19.37 

19.19

Ju

17.59 

17.60 

17.64 

17.65 

17.68 

17.66

22,200 

22,700 

23,200 

23,700 

24,300 

24,800

ne2

34,400 

33,600 

32,900 

32,200 

31,500 

30,900

ne8

25,400 

25,400 

25,500 

25,600 

25,700 

25,600

June 14

16.61 

16.49 

16.34 

16.17 

16.04 

15.94

22,300 

21,900 

21,400 

20,900 

20,500 

20,200

June 20

15.34 

15.23 

15.12 

15.01 

14.91 

14.86

18,500 

18,200 

17,900 

17,600 

17,300 

17,200

Gage 

height Discharge

May 22

11.77 

12.03 

12.24 

12.39 

12.51 

12.64

9,980 

10,500 

10,900 

11,200 

11,500 

11,800

May 28

17.63 

17.81 

18.06 

18.30 

18.59 

18.80

25,500 

26,100 

26 , 900 

27,700 

28,700 

29,500

June 3

19.04 

18.90 

18.76 

18.67 

18.55 

18.44

Jt

17.69 

17.70 

17.72 

17.73 

17.73 

17.72j

30,300 

29,800 

29,300 

29,000 

28,600 

28,200

ne9

25,700 

25,700 

25,800 

25,800 

25,800 

25,800

June 15

15.88 

15.84 

15.79 

15.74 

15.67 

15.61

20,100 

20,000 

19,800 

19,700 

19,500 

19,303

June 21

14.77 

14.72 

14.67 

14.60 

14.52 

14.47

16,900 

16,800 

16,700 

16,500 

16,300 

16,200

Supplemental record.- May 21, 6 p.m., 10.73 ft., 8,000 sec.-ft.; May 31, 11 a.m.,

21.79 ft., 40,500 sec.-ft.
OKANOGAN RIVER BASIN 147

Slmllkameen River near Highthawk, Wash. 

(International gaging station)

Location.- Lat. 48°59'10", long. 119°37'00", In NW£ sec. 7, T. 40 N., R. 26 E., about 

It miles downstream from Nlghthawk and 12 miles upstream from mouth.

Drainage area.- 3,420 square miles.

Gage-height "record.- Water-stage recorder graph.

Discharge record.-""Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths May 17 to June 21 j half-tenths below and tenths 

above 6.1 feet May 1-16, June 21 to July 31.

Maxima.- May-June 1948: Discharge, 38,700 second-feet 10 a.m. May 30 (gage height,

 T776"2 feet) .

1928 to April 1948: Discharge, 27,200 second-feet Apr. 26, 1934 (gage height, 

14.96 feet).

Remarks.- Flow regulated by natural diversion Into and release from Palmer Lake. Small 

diversions above station for Irrigation. This station Is an International gaging 

station maintained by the United States under agreement with Canada. Records provisional, subject to revision.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,090

2,040

2,040

2,090

2,200

2,310

2,800

3,430

3,560

3,840

June

29,200

25,600

23,900

23,300

22,500

22,700

23,000

23,700

23,500

22,100

July

5,780

5,250

4,910

4,590

4,430

4,430

4,430

5,080

4,910

4,280

Day

11

12

13

14

15

16

17

18

19

20

May

4,280

4,910

5,250

5,250

5,080

5,250

5,550

6,100

6,350

6,730

June

22,100

20 , 700

19,600

17,200

16,500

16,400

18,000

18,100

15,800

14,200

July

4,130

3,980

3,700

3,560

3,300

3,170

3,040

2,910

3,300

3,980

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in 'second-feet ... .. ....... . . .. ........... . ............... .

Runoff, in inches ............................................................................................................................

May

9,030

11,900

14,300

16,200

20,700

23,300

27,000

31,800

37,000

38,100

34,600

11,130

3.75

June

13,500

13,100

11,500

10,500

9,510

8,830

8,170

7,330

6,930

6,340

17,130

5.59

July

3,560

3,300

3,040

2,910

2,850

2,610

2,490

2,490

2,610

2,430

2,260

3,668

1.24

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

t*

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

7.57 

7.59 

7.62 

7.72 

7.81 

7.85

5,370 

5,400 

5,460 

5,640 

5,800 

5,870

May 23

11.22 

11.33 

11.42 

11.47 

11.51 

11.56

Mi

17.02 

17.20 

17.32 

17.42 

17.50 

17.48

13,800 

14,100 

14,400 

14,500 

14,700 

14,800

iy29

35,900 

36,700 

37 , 300 

37,700 

38,100 

38,000

June 4

14.11 

14.02 

13.99 

13.94 

13.91 

13.86

23,800 

23,400 

23,300 

23,100 

23,000 

22,800

June 10

13.81 

13.66 

13.55 

13.53 

13.59 

13.70

Ju

11.90 

11.85 

11.95 

12.12 

12.30 

12.40

22,600 

22,100 

21,700 

21,600 

21,800 

22,200

ne!6

15,900 

15,700 

16,100

16,600 

17,200 

17,600

Gage 

height Discharge

May 18

7.87 

7.89 

7.92 

8.05 

8.11 

8.13

5,910 

5,940 

6,000 

6,240 

6,360 

6,400

May 24

11.64 

11.75 

11.90 

12.10 

12.35 

12.79

15,100 

15,400 

15,900 

16,600 

17,400 

18,900

May 30

17.49 

17.61 

17.60 

17.53 

17.43 

17.31

38,100 

38,600 

38,600 

38,200 

37,800 

37,200

June 5

13.81 

13.75 

13.70 

13.72 

13.80 

13.86

22,600 

22,300 

22,200 

22,300 

22,600 

22,800

June 11

13.75 

13.75 

13.70 

13.63 

13.56 

13.47

22,400 

22,400 

22,200 

22,000 

21,700 

21,400

June 17

12.42 

12.46 

12.50 

12.56 

12.64 

12.67

17,600 

17,800 

17,900 

18,100 

18,400 

18,500

Gage 

height Discharge

May 19

8.13 

8.10 

8.08 

8.09 

8.11 

8.11

6,400 

6,340 

6,300 

6,320 

6,360 

6,360

May 25

13.08 

13.28 

13.33 

13.37 

13.45 

13.59

20,000 

20 , 700 

20,900 

21,000 

21,300 

21,800

May 31

17.17 

16.95 

16.72 

16.49 

16.27 

16.09

36,600 

35,600 

34,600 

33,500 

32,600 

31,800

June 6

13.86 

13.80 

13.76 

13.76 

13.84 

13.91

Ju

13.36 

13.27 

13.23 

13.23 

13.29 

13.33

22,800 

22,600 

22,500 

22,500 

22,800 

|_ 23,000

ne!2

21,000 

20,600 

20,500 

20,500 

20,700 

20,900

June 18

12.68 

12.66 

12.60 

12.50 

12.40 

12.27

18,500 

18,500 

18,300 

17,900 

17,600 

17,100

Gage 

height Discharge

May 20

8.10 

8.09 

8.19 

8.40 

8.59 

8.73

6,340 

6,320 

6,510 

6,930 

7,310 

7,600

May 26

13.75 

13.87 

13.95 

14.03 

14.22 

14.45

Ju

15.89 

15.68 

15.42 

15.23 

15.08 

14.94

22,400 

22,900 

23,200 

23,500 

24,200 

25,100

ne 1

30,900 

30,100 

29,000 

28,200 

27 , 600 

27,000

June 7

13.91 

13.86 

13.85 

13.89 

13.98 

14.04

23,000 

22,800 

22,800 

22,900 

23,300 

23,500

June 13

13.28 

13.14 

12.95 

12.81 

12.69 

12.54

20,700 

20,200 

19,500 

19,000 

18,600 

18,000

June 19

12.11 

11.95 

11.83 

11.75 

11.66 

11.55

16,600 

16,100 

15,700 

15,400 

15,100 

14,800

Gage 

height Discharge

May 21

8.86 

9.03 

9.32 

9.67 

9.94 

10.12

7,880 

8,240 

8,870 

9,670 

10,300 

10,800

May 27

14.63 

14.80 

14.90 

15.05 

15.22 

15.51

25,800 

26,500 

26,900 

27 , 500 

28,200 

29,300

June 2

14.82 

14.68 

14.54 

14.43 

14.39 

14.35

26,500 

26,000 

25,400 

25,000 

24,900 

24,700

JuneS

14.08 

14.06 

14.03 

14.05 

14.14 

14.22

23,700 

23,600 

23,500 

23,600 

23,900 

24,200

June 14

12.37 

12.24 

12.20 

12.24 

12.26 

12.24

17,500 

17,000 

16,900 

17,000 

17,100 

17,000

June 20

11.43 

11.36 

11.34 

11.30 

11.26 

11.21

14,400 

14,200 

14,100 

14,000 

13,900 

13,800

Gage 

height Discharge

May 22

10.25 

10.36 

10.50 

10.70 

10.89 

11.06

11,100 

11,400 

11,700 

12,300 

12,800 

13,300

May 28

15.65 

15.86 

16.06 

16.26 

16.51 

16.80

29,900 

30,800 

31,700 

32,500 

33,600 

34,900

June 3

14.30 

14.18 

14.07 

14.02 

14.06 

14.11

Ju

14.21 

14.09 

14.00 

13.94 

13.93 

13.91

24,500 

24,000 

23,600 

23,400 

23,600 

23,800

ne 9

24,200 

23,700 

23,400 

23,100 

23,100 

23,000

June 15

12.16 

12.06 

12.00 

12.04 

12.07 

12.00

16,800 

16,400 

16,200 

16,400 

16,500 

16,200

June 21

11.16 

11.12

11.00 11.11

11.14 

11.16

13,600 

13,500 

13,100 

13,400 

13,500 

13,600

Supplemental record.- May 29, 10 p.m., 17.52 ft., 38,200 sec.-ft.; May 30, 2 a.m., 

17.43 ft., 37,800 sec.-ft., 7 a.m., 17.53 ft., 38,200 sec.-ft., 10 a.m., 17.62 ft., 

38,700 sec.-ft.; June 13, 2 a.m., 13.33 ft., 20,900 sec.-ft.
48 FLOODS OP MAY-JUKE 1948 IS COLUMBIA RIVER BASIN

Methow RiVer Basin 

Methow River at Twisp, Wash.

Location.- Lat. 48°21'40", long. 120°06'50", in sec. 17, T. 33 H., R. 22 E., at highway 

 bridge at Twisp, a quarter of a mile downstream from Twisp River. (See pi. 11A.) 

Drainage area.- 1,330 square miles. 

Qage-height record.- Water-stage recorder graph except 8 a.m. July 30 to July 31 tor

which gage heights were interpolated. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

10,000 second-feet and extended to peak stage on basis of slope-area measurement.

Shifting-control method used 12 p.m. May 28 to 2 p.m. May 29. Gage heights used to

hundredths May 17 to June 21; half-tenths below and tenths above 4.0 feet May 1-17,

June 22 to July 30. 

Maxima.- May-June 1948: Discharge, 40,800 second-feet 2 p.m. May 29 (gage height, 12.94

feet), by slope-area method.

1919-29, 1933 to April 1948: Discharge, 21,300 second-feet May 26, 1942 (gage

height, 10.76 feet). 

Remarks.- Diversions above station for irrigation are probably a small percentage of

flood discharge.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,450

1,350

1,400

1,500

1,450

1,500

1,650

1,700

1,760

1,920

June

9,050

8,920

9,220

9,900

10,500

10,900

10,600

9,840

10,000

10,400

July

3,140

2,770

2,550

2,340

2,290

2,550

2,600

2,600

2,340

2,200

Day

11

12

13

14

15

16

17

18

19

20

May

1,980

2,160

2,480

2,350

2,280

2,280

2,390

2,590

2,770

3,180

June

11,000

10,300

8,780

8,480

7,870

9,320

11,000

9,180

7,900

7,490

July

2,100

2,100

1,890

1,810

1,770

1,730

1,700

1,730

2,100

2,060

Day

21

22'£&

24

25

26

27

28

29

80

31

Monthly mean discharge, in second-feet ...........

Runoff, in inches ............................................................................................................................

May

4,900

7,000

8,580

10,100

10,700

12,400

14,800

18,600

32,500

17,900

10,000

5.25

June

6,970

6,210

5,590

5,210

4,840

4,500

4,170

4,010

3,850

3,700

6.70

July

1,970

1,810

1,700

1,620

1,520

1,430

1,400

1,350

1,350

1,300

1,300

1,972

1.71

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.30 

4.33 

4.34 

4.35 

4.36 

4.37

2,350 

2,390 

2,400 

2,420 

2,430 

2,440

May 23

7.42 

7.48 

7.52 

7.55 

7.71 

7.97

8,300 

8,440 

8,520 

8,590 

8,940 

9,520

May 29

12.27 

12.66 

12.83 

12.76 

12.20 

11.08

25,500 

31,700 

37,600 

39,500 

35,600 

28,500

June 4

6.64 

6.74 

6.77 

6.64 

6.94 

7.14

Ju

6.86 

6.93 

6.96 

6.98 

6.98 

7.06

Ju

6.10 

6.14 

6.46 

6.86 

7.13 

7.11

9,530 

9,820 

9,910 

9,530 

10,400 

11,000

ne 10

10,200 

10,400 

10,500 

10,500 

10,500 

10,800

ne!6

8,070 

8,170 

9,020 

10,200 

11,000 

10,900

Gage 

height Discharge

May 18

4.44 

4.48 

4.51 

4.50 

4.49 

4.53

2,540 

2,590 

2,630 

2,620 

2,610 

2,660

May 24

8.25 

8.35 

8.32 

8.17 

8.11 

8.25

10,200 

10,400 

10,300 

9,980 

9,840 

10,200

May 30

10.19 

9.40 

8.78 

8.00 

7.74 

7.45

' 23,600 

19,600 

17,000 

13,900 

12,900 

12,000

June 5

7.18 

6.94 

6.73 

6.76 

7.07 

7.21

11,100 

10,400 

9,790 

9,880 

10,800 

11,200

June 11

7.23 

7.20 

7.20 

7.05 

6.97 

7.06

11,300 

11,200 

11,200 

10,800 

10,500 

10,800

June 17

7.14 

7.25 

7.22

7.18 

7.02 

6.90

11,000 

11,400 

11,300 

11,100 

10,700 

10,300

Gage 

height Discharge

May 19

4.59 

4.61 

4.63 

4.62 

4.62 

4.64

Mi

8.39 

8.51 

8.52 

8.41 

8.44 

8.72

Mi

7.32 

7.04 

6.61 

6.45 

6.36 

6.62

2,750 

2,770 

2,800 

2,790 

2,790 

2,820

iy25

10,500 

10,800 

10,800 

10,500 

10,600 

11,300

iy31

11,600 

10,700 

9,440 

9,000 

8,750 

9,470

June 6

7.19 

7.07 

6.88 

7.00 

7.27 

7.33

11,200 

10,800 

10,200 

10,600 

11,400 

11,600

June 12

7.18 

7.06 

6.96 

6.80 

6.64 

6.62

11,100 

10,800 

10,500 

10,000 

9,530 

9,470

June 18

6.74 

6.62 

6.50 

6.39 

6.27 

6.22

9,820 

9,470 

9,130 

8,830 

8,510 

8,380

Gage 

height Discharge

May 20

4.69 

4.77 

4.86 

4.95 

5.06 

5.26

2,890 

3,000 

3,140 

3,280 

3,460 

3,810

May 26

9.04 

9.23 

9.30 

9.21 

9.26 

9.54

12,000 

12,500 

12,700 

12,500 

12,600 

13,300

June 1

6.64 

6.60 

6.52 

6.28 

6.23 

6.44

9,530 

9,410 

9,190 

8,540 

8,410 

8,970

June 7

7.24 

6.94 

6.71 

6.86 

7.05 

7.03

11,300 

10,400 

9,730 

10,200 

10,800 

10,700

June 13

6.58 

6.42 

6.30 

6.20 

6.23 

6.33

9,350 

8,910 

8,590 

8,330 

8,410 

8,670

June 19

6.10 

6.08 

6.02 

5.98 

5.92 

5.97

8,070 

8,020 

7,870 

7,770 

7,620 

7,740

Gage 

height Discharge

May 21

5.51 

5.70 

5.86 

5.93 

6.08 

6.38

4,380 

4,660 

4,980 

5,120 

5,430 

6,060

May 27

9.87 

10.17 

10.25 

10.17 

10.24 

10.60

14,200 

14,900 

15,200 

14,900 

15,100 

16,100

June 2

6.58 

6.54 

6.43 

6.24 

6.26 

6.51

Ju

6.92 

6.76 

6.56 

6.60 

6.67 

6.86

9,350 

9,240 

8,940 

8,430 

8,490 

9,160

ne8

10,400 

9,880 

9,300 

9,410 

9,610 

10,200

June 14

6.41 

6.38 

6.31 

6.12 

6.11 

6.10

8,890 

8,810 

8,620 

8,120 

8,100 

8,070

June 20

5.98 

5.97 

5.83 

5.79 

5.76 

5.74

7,770 

7,740 

7,400 

7,310 

7,240 

7,190

Gage 

height

M

6.63 

6.79 

6.86 

6.88 

6.99 

7.23

Discharge

iy22

6,580 

6,920 

7,070 

7,120 

7,360 

7,890

May 28

11.02 

11.47 

11.63 

11.59 

11.62 

11.77

17,400 

18,700 

19,200 

19,100 

19,200 

19,600

June 3

6.65 

6.72 

6.46 

6.37 

6.40 

6.59

Jl

6.84 

6.85 

6.83 

6.81 

6.74 

6.70

9,560 

9,760 

9,080 

8,780 

8,860 

9,380

ne9

10,100 

10,200 

10,100 

10,000 

9,820 

9,700

June 15

6.12 

5.99 

5.97 

5.93 

6.03 

6.06

8,120 

7,800 

7,740 

7,640 

7,900 

7,970

June 21

5.74 

5.73 

5.67 

5.60 

5.52 

5.46

7,190 

7,170 

7,030 

6,870 

6,690 

6,550

Supplemental record.- May 29, 2 p.m., 12.94 ft., 40,800 sec.-ft.
WATER-SUPPLY PAPER 1080 PLATE 11

BRIDGE OVER METHOW RIVER NEAR CARLTON, WASH.

B. BUILDING DAMAGED BY ENTIAT RIVER ABOUT 5 MILES ABOVE MOUTH.

FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

149 

Chelan River Basin

Stehekin River at Stehekin, Wash.

Location.- Lat. 48°19'50", long. 120°41'40", In SE£ sec. 26, T. 33 N., R. 17 E., 1,300 

feet upstream from Boulder Creek and 2 miles upstream from Lake Chelan and Stehekln.

Drainage area.- 372 square miles, including that of Boulder Creek.

Gage-height record.- Water-stage recorder graph except for May 1, 2, when there was no 

gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

8,400 second-feet and extended to peak stage on basis of slope-area measurement. 

Gage heights used to hundredths May 17 to June 21; half-tenths below and tenths above 

32.3 feet May 1 to 16, June 23 to July 31. Suifting-control method used May 38. Discharge for period of no gage-height record computed on basis of records for nearby 

streams and weather records.

Maxima.- May-June 1948: Discharge, 18,600 second-feet 2 a.m. May 39 (gage height, 29.00 

feet), by slope-area method.

1910-15, 1927 to April 1948: Discharge, 13,900 second-feet June 2, 1936 (gage 

height, 27.18 feet).

Remarks.- Flood flow not affected by diversion or storage. Gage-height record collected 

in cooperation with Washington Water Power Co., which furnished some discharge 

measurements.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,080

1,080

1,080

1,040

1,080

1,250

1,380

1,430

1,530

1,630

June

6,010

5,890

6,140

6,030

7,040

7,980

9,370

9,260

8,590

8,990

July

3,980

2,560

2,440

2,330

2,110

2,380

2,280

1,950

1,800

1,950

Day

11

12

13

14

15

16

17

18

19

20

May

1,730

1,780

1,880

1,780

1,780

1,780

2,020

2,170

2,200

2,620

June

7,650

5,930

5,270

4,940

4,640

4,910

5,050

4,360

4,540

4,640

July

2,060

1,900

1,850

1,900

2,060

2,280

2,330

2,440

2,280

2,060

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...... .... ... .. .......................... .......................

Runoff, in inches ............................................................................................................................

May

3,960

5,160

5,600

6,290

7,060

8,810

11,200

16,000

15,400

8,200

6,400

4,077

12.64

June

4,420

3,870

3,730

3,590

3,450

3,450

3,590

3,870

4,020

3,590

5,494

16.48

July

2,000

2,000

1,900

1,610

1,480

1,480

1,700

1,520

1,560

1,660

1,700

3,018

6.25

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

h> 

K

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

31.43 

21.42 

21.42 

21.48 

21.58 

21.62

1,960 

1,960 

1,960 

2,030 

2,140 

2,180

May 23

23.89 

23.79 

23.73 

23.80 

24.06 

24.31

M

28.91 

28.47 

27.99 

27.40 

26.91 

26.33

Ju

23.82 

23.70 

23.59 

23.80 

24.36 

24.56

5,580 

5,400 

5,290 

5,420 

5,890 

6,360

»y29

18,300 

17,000 

15,600 

14,000 

12,600 

11,200

ne 4

5,850 

5,630 

5,440 

5,810 

6,840 

7,240

June 10

25.61 

25.54 

25.26 

25.16 

25.32 

25.32

9,470 

9,310 

8,690 

8,480 

8,820 

8,820

June 16

23.02 

23.02 

23.24 

23.45 

23.58 

23.55

4,500 

4,500 

4,850 

5,200 

5,430 

5,380

Gage 

height Discharge

May 18

21.61 

21.59 

21.56 

21.59 

21.66 

21.67

2,170 

2,150 

2,120 

2,150 

2,230 

2,240

May 24

24.31 

24.19 

24.04 

24.10 

24.43 

24.81

M:

25.59 

25.25 

24.68 

24.55 

24.57 

24.48

Ju

24.52 

24.35 

24.12 

24.21 

24.76 

24.97

6,360 

6,130 

5,850 

5,960 

6,590 

7,350

iy30

9.430 

8,670 

7,480 

7,220 

7,260 

7,080

ne 5

7,160 

6,820 

6,390 

6,560 

7,640 

8,080

June 11

25.06 

24.83 

24.65 

24.64 

24.54 

24.37

Ju

23.51 

23.47 

23.38 

23.25 

23.19 

23.12

8,270 

7,780 

7,420 

7,400 

7,200 

6,860

ne!7

5,310 

5,240 

5,090 

4,870 

4,770 

4,660

Gage 

height Discharge

May 19

21.67 

21.64 

21.62 

21.62 

21.62 

21.66

2,240 

2,210 

2,180 

2,180 

2,180 

2,230

May 25

24.56 

24.43 

24.30 

24.50 

25.06 

25.38

M:

24.26 

24.08 

23.92 

23.96 

24.14 

24.25

Ji

24.83 

24.62 

24.46 

24.75 

25.50 

25.71

6,850 

6,590 

6,340 

6,730 

7,880 

8,570

iy31

6,650 

6,310 

6,030 

6,100 

6,430 

6,640

ne6

7,780 

7,360 

7,040 

7,620 

9,220 

9,700

June 12

24.14 

23.96 

33.71 

33.64 

33.70 

33.70

6,430 

6,100 

5,650 

5,530 

5,630 

5,630

June 18

23.03 

32.92 

22.81 

22.80 

22.94 

23.01

4,500 

4,350 

4,180 

4,170 

4,380 

4,490

Gage 

height Discharge

May 20

21.72 

21.79 

21.84 

21.99 

22.34 

22.61

2,300 

2,390 

2,450 

2,630 

3,090 

3,460

May 26

25.34 

25.15 

25.05 

25.37 

26.07 

26.39

Ju

24.07 

23.90 

23.73 

23.73 

23.91 

24.00

Ju

25.56 

25.30 

25.10 

25.41 

26.00 

26.21

8,480 

8,060 

7,860 

8,540 

10,200 

10,900

ne 1

6,300 

5,990 

5,680 

5,680 

6,010 

6,170

ne7

9,360 

8,780 

8,350 

9,020 

10,400 

10,900

June 13

23.54 

23.46 

23.36 

23.40 

23.54 

23.53

5,360 

5,220 

5,050 

5,120 

5,360 

5,340

June 19

22.96 

22.87 

22.79 

22.99

23.38 

23.41

4,410 

4,280 

4,160 

4,460 

5,090 

5,140

Gage 

height Discharge

May 21

22.71 

22.74 

22.72 

22.95 

23.34 

23.57

3,620 

3,660 

3,630 

3,980 

4,620 

5,010

May 27

26.27 

26.06 

25.91 

26.40 

27.19 

27.54

Ju

23.91 

23.75 

23.60 

23.64 

24.04 

24.20

Ju

25.90 

25.43 

25.02 

25.14 

25.61 

25.73

10,600 

10,100 

9,770 

11,000 

13,000 

14,000

ne2

6,010 

5,720 

5,460 

5,530 

6,240 

6,540

ne8

10,100 

9,070 

8,180 

8,430 

9,470 

9,750

June 14

23.42 

23.30 

23.17 

23.17 

23.30 

23.30

5,150 

4,950 

4,740 

4,730 

4,950 

4,950

June 20

23.30 

23.12 

23.02 

22.97 

22.99 

23.02

4,950 

4,660 

4,500 

4,420 

4,460 

4,500

Gage 

height Discharge

May 22

23.65 

23.61 

23.56 

23.59 

23.79 

23.92

5,150 

5,080 

4,990 

5,040 

5,400 

5,640

May 28

28.19 

28.34 

27.92 

28.01 

28.52 

28.90

15,800 

16,400 

15,200 

15,600 

17,100 

18,300

June 3

24.18 

24.01 

23.91 

23.85 

23.89 

23.90

6,500 

6,190 

6,010 

5,900 

5,970 

5,990

June 9

25.50 

25.10 

24.74 

24.86 

25.35 

25.65

9,220 

8,350 

7,600 

7,850 

8,890 

9,560

June 15

23.21 

23.18 

22.96 

23.02 

23.09 

23.06

4,810 

4,760 

4,410 

4,500 

4,610 

4,570

June 21

23.06 

23.05 

22.98 

22.91 

22.83 

22.81

4,570 

4,550 

4,440 

4,340 

4,290 

4,180

Supplemental record.- May 2 a.m., 29.00 ft., 18,600 sec. -ft.
FLOODS OP MAY-JOKE 1948 IN COLUMBIA RIVER BASIN

Lake Chelan at Chelan, Wash.

Location.- Lat. 47°50'00", long. 120°03'40", in lot 3, sec. 15, T. 27 N., R. 22 E., 

2 miles west of Chelan. Datum of gage is at mean sea level, adjustment of 1912.

Drainage area.- 950 square miles.

Gage-height record.- Water-stage recorder graph. Elevations given are mean 12 p.m. 

readings for stations at Chelan and at Purple Point at Stehekin.

Remarks.- Reservoir is formed by low concrete dam at lake outlet. Capacity, 676,100 

acre-feet between elevations 1,079 and 1,100 feet. Regulation between these elevations is allowed by stipulation of Federal Power Commission. Water is used for 

power development. Gage-height record collected in cooperation with Washington 

Water Power Co.

Elevation*, in feet, and contents, in acre-feet, at 12 p.m., 1948

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change in contents, acrefeet

Change in contents, equivalent mean

second-feet

May

Feet

88.10

88.16

88.23

88.25

88.29

88.34

88.38

88.46

88.60

88.70

88.78

88.95

89.09

89.22

89.34

89.51

89.66

89.82

90.01

90.26

90.58

91.04

91.63

92.18

92.75

93.48

94.43

95.98

97.02

97.20

97.24

Acre-feet

288,970

290,900

293,160

293,800

295,090

296,700

297,990

300,560

305,070

308,290

310,870

316,340

320,850

325,030

328,900

334,370

339,200

344,350

350,470

357,280

368,940

383,850

402,960

420,780

439,250

463,000

493,970

544,500

578,400

584,290

585,600

+298,560

+4,856

June

Feet

97.28

97.39

97.56

97.70

97.92

98.19

98.54

98.74

98.80

98.90

98.91

98.74

98.50

98.36

98.32

98.49

98.65

98.68

98.70

98.74

98.72

98.64

98.64

98.71

98.74

98.78

98.83

98.92

99.00

99.12

Acre-feet

586,910

590,510

596,090

600,680

607,900

616,750

628,230

634,790

636,760

640,040

640,370

634,790

626,920

622,330

621,020

626,590

631,840

632,820

633,480

634,790

634,140

631,510

631,510

633,810

634,790

636,100

637,740

640,700

643,320

647,260

-+61,660

+1,036

July

Feet

99.18

99.19

99.29

99.48

99.70

99.83

99.88

99.84

99.83

99.88

99.82

99.82

99.84

99.85

99.88

99.89

99.85

99.84

99.84

99.80

99.82

99.88

99.85

99.79

99.84

99.80

99.80

99.79

99.78

99.86

99.90

Acre -feet

649,220

649,550

652,830

659,060

666,280

670,540

672,180

670,870

670,540

672,180

670,220

670,220

670,870

671,200

672,180

672,510

671,200

670,870

670,870

669,560

670,220

672,180

671,200

669,230

670,870

669,560

669,560

669,230

668,900

671,530

672,840

+25,580

+416

* Add 1,000 feet to obtain elevation above mean sea level.
CriELAN RIVER BASIN 151

Chelan River at Chelan, Wash.

Location.- Lat. 47°50'05", long. 120°00'40", in SE£ sec. 12, T. 27 N., R. 22 E., in

forebay upstream from cpntrol dam at Chelan. Datum of gage is at mean sea level,

subject to correction to datum of 1929. 

Drainage area.- 950 square miles. 

Gage-height record.- Water-stage recorder graph, supplemented by records of powerplant operation. 

Discharge record.- Figures of daily discharge computed by adding discharge over

spillway, discharge through turbines, and diversions past dam. 

Maxima.- May-June 1948: Daily discharge, 16,000 second-feet (regulated) May 30.

1903 to April 1948: Discharge, 12,800 second-feet (regulated) June 3, 1936. 

Remarks.- Diversions above station for irrigation are small percentage of total runoff.

Washington Water Power Co. diverts water at Chelan for power and irrigation, which

quantity is included in records of daily discharge. Plow regulated by Lake Chelan.

Figures of discharge not adjusted for storage. Records collected in cooperation

vith Washington Water Power Co.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

708

332

1,330

1,320

1,320

1,300

1,300

918

193

1,240

June

12,600

11,100

10,300

10,500

10,600

10,900

11,200

13,300

14,800

15,000

July

4,090

3,740

2,090

1,040

697

1,940

2,770

3,780

3,270

2,320

Day

11

1?

13

14

15

16

17

18

19

20

May

1,190

678

745

761

527

180

726

760

760

753

June

15,100

15,100

14,700

12,300

9,500

8,100

8,270

8,340

8,350

8,440

July

4,200

2,790

2,660

2,810

2,680

3,370

4,560

4,750

3,770

4,340

Day

21

22

23

24

25

?fi

W

as

29

30

31

Monthly mean discharge, in second-feet ...............................................................................

Runoff, in inches .......................................................................................... ...:..............................

May

798

1,000

293

1,420

1,790

1,870

1,790

2,650

13,400

16,000

13,500

2,308

2.80

June

8,420

8,410

6,410

5,260

5,270

5,310

5,330

5,310

4,800

3,950

9,566

11.23

July

?,850

2,070

3,320

2,960

- ,400

2,200

2,240

2,130

1,930

1,420

1,670

2,802

3.40
152 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Railroad Creek at Lucerne, Wash.

Location.- Lat. 48°11'40", long. 120°35'50", in sec. 9, T. 51 N,, R. 18 E., half a mile 

upstream from mouth and half a mile southwest of Lucerne.

Drainage area.- 64 square miles.

Gage-height record.- Water-stage recorder graph May 1 to May 24. Staff gage read once 

daily July 2-30 except July 18, 25, when there was no gage-height record. No gageheight record May 25 to July 1. .

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

1,280 second-feet and extended to peak stage on basis of combination slope-area and 

contracted opening measurement. Gage heights used to hundredths. Discharge for 

periods of no gage-height record computed on basis of records for nearby streams.

Maxima.- May-June 1948: Discharge, 5,900 second-feet May 28 (gage height, 8.1 feet, 

from floodmarks).

1910-15, 1927 to April 1948: Discharge, 1,910 second-feet June 8, 1927 (gage 

height, 5.5 feet).

Remarks.- No diversion or regulation. Gage-height record collected in cooperation with 

Washington Water Power Co. which furnished several discharge measurements.

Mean discharge, in second-feet,

Day

1

2

3

4

5

6

7

8

9

10

May

157

152

157

175

175

191

197

207

218

241

June

1,100

1,100

1,200

1,300

1,403

1,603

1,700

1,700

1,600

1,600

July

610

544

526

517

454

544

490

401

377

361

Day

11

12

13

14

IS

16

17

18

19

20

May

247

258

282

276

270

276

296

320

334

394

June

1,400

1,200

1,100

1,000

980

1,000

1,000

900

960

960

July

385

418

377

401

427

445

472

490

472

454

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . .... .. ...

Runoff, in inches ...................................... . .. ................................................................................

May

534

731

828

970

1,200

1,500

2,000

3,000

2,300

1,500

1,300

667

12.02

June

900

800

740

700

670

680

700

730

760

710

1,073

18.71

July

427

427

427

409

350

299

345

291

284

314

329

422

7.59

Gage height, in feet, ami discharge, in second-feet, at indicated time, 1948

t§

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.40 

3.40 

3.40 

3.42 

3.43 

3.44

288 

288 

288 

301 

308 

314

May 23

4.16 

4.13 

4.10 

4.11 

4.19 

4.25

838 

814 

790 

798 

862 

910

Gage 

height Discharge

May 18

3.44 

3.44 

3.44 

3.45 

3.47 

3.47

314 

314 

314 

320 

334 

334

May 24

9.33 

4.31 

4.30 

4.31 

4.37 

4.40

974 

958 

850 

958 

1,010 

1,030

Gage 

height Discharge

May 19

3.47 

3.47 

3.47 

3.47 

3.47 

3.48

334 

334 

334 

334 

334 

340

May 25

Gage 

height Discharge

May 20

3.50 

3.52 

3.53 

3.58 

3.64 

3.70

353 

366 

373

407 

448 

490

May 26

Gage 

height Discharge

May 21

3.72 

3.71 

3.71 

3.76 

3,85 

3.93

504 

497 

497 

533 

599 

659

May 27

Gage 

height Discharge

May 22

3.98 

4.00 

4.01 

4.03 

4.09 

4,14

697 

712 

720 

735 

782 

822

May 28

Wenatchee River Basin

Wenatohee Lake near Plain, Wash.

Location.- Lat. 47°49'50", long. 120°46'30", in sec. 19, T. 27 N., R. 17 E., on north 

shore, 2-f miles upstream from outlet, 7^- miles northwest of Plain, and 33 miles upstream from Leavenworth. Datum of gage is 1,800.00 feet above mean sea level, 

subject to correction to datum of 1929.

Drainage area.- 277 square miles.

Gage-height "record.- Water-stage recorder graph except for period June 24-28.

Mean gage height, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

70.97

70.89

70.89

71.00

71.02

71.14

71.42

71.50

71.52

71.52

June

75.74

75.52

75.64

75.76

75.84

76.16

76.65

77.16

77.27

77.20

July

73.09

72.61

72.31

72.16

71.94

71.86

71.87

71.73

71.58

71.57

Day

11

12

13

14

15

16

17

18

19

20

May

71.53

71.56

71.72

71.79

71.78

71.77

71.89

72.08

72.17

72.34

June

77.00

76.40

75.51

74.82

74.31

74.18

74.27

73.95

73.72

73.75

July

71.60

71.52

71.43

71.43

71.49

71.58

71.62

71.63

71.55

71.46

Day

21

22

23

24

25

26

27

28

29

30

31

May

73.06

73.92

74.28

74.54

75.06

75.74

76.83

78.46

79.35

78.02

76.49

June

73.70

73.50

73.24

73.28

73.42

73.43

July

71.46

71.39

71.30

71.15

71.00

70.91

70.89

70.85

70.80

70.82

70.86
WENATCHEE RIVER BASIN 153

Wenatchee River below Wenatchee Lake, Wash.

Location.- Lat. 47°49'50", long. 120°46'30", in sec. 19, T. 27 N., R. 17 E., on north 

shore of Wenatchee Lake, 2£ miles upstream from outlet, 7j miles northwest of Plain, 

and 33 miles upstream from Leavenworth. Datum of gage is 1,800.00 feet above mean 

sea level, subject to correction to datum of 1629. Discharge measurements made half 

a mile downstream from lake outlet.

Drainage area.- 277 square miles.

Gage-height "record.- Water-stage recorder graph except for period June 24-28 when there 

was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

11,000 second-feet and extended to peak stage. Gage heights used to hundredths. 

Discharge for period of no gage-height record computed on basis of records for 

stations on nearby streams.

Maxima.- May-June 1948: Discharge, 13,700 second-feet 6 a.m. May 29 (elevation of lake 

surface, 1,879.65 feet).

1932-42, 1946 to April 1948: Discharge, 8,310 second-feet June 16, 1933 (elevation of lake surface, 1,876.57 feet).

Remarks.- No diversion.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,210

1,130

1,130

1,240

1,260

1,380

1,670

1,760

1,780

1,780

June

6,950

6,660

6,820

7,000

7,080

7,530

8,220

8,960

9,120

9-, 050

July

3,580

3,000

2,650

2,490

2,240

2,160

2,170

2,010

1,850

1,840

Day

11

12

13

14

15

16

17

18

19

20

May

1,790

1,830

2,000

2,080

2,070

2,060

2,190

2,390

2,500

2,690

June

8,720

7,880

6,660

5,760

5,100

4,910

5,030

4,620

4,340

4,370

July

1,870

1,780

1,680

1,680

1,750

1,850

1,890

1,900

1,820

1,720

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet........................................... ...................... ............

Runoff, in inches ...........................................................................................................................

May

3,540

4,590

5,060

5,390

6,080

6,970

8,480

11,300

13,000

10,500

7,990

3,834

15.96

June

4,310

4,070

3,760

3,700

3,640

3,570

3,600

3,810

3,970

3,990

5,773

23.25

July

1,720

1,640

1,540

1,390

1,240

1,150

1,130

1,090

1,040

1,060

1,100

1,807

7.52

Gage height, in feet, and discharge, in secrrnd-feet, at indicated time, 1948

W

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

71.83 

71.87 

71.90 

71.92 

71.95 

71.97

2,120 

2,170 

2,200 

2,220 

2,260 

2,280

May 23

74.26 

74.30 

74.30 

74.30 

74.30 

74.30

5,030 

5,080 

5,080 

5,080 

5,080 

5,080

May 29

79.57 

79.57 

79.43 

79.26 

79.09 

78.86

13,500 

13,500 

13,200 

12,900 

12,500 

12,000

June 4

75.78 

75.79 

75.80 

75.78 

75.75 

75.75

7,000 

7,020 

7,030 

7,000 

6,960 

6,960

June 10

77.18 

77.23 

77.26 

77.24 

77.21 

77.14

Ju

74.15 

74.18 

74.17 

74.17 

74.18 

74.23

9,000 

9,080 

9,130 

9,090 

9,050 

8,930j

ne!6

4,880 

4,920 

4,910 

4,910 

4,920 

4,990

Gage 

height Discharge

May 18

72.02 

72.07 

72.09 

72.10 

72.10 

72.12

2,330 

2,390 

2,410 

2,420 

2,420 

2,440

May 24

74.36 

74.47 

74.57 

74.64 

74.67 

74.76

5,160 

5,300 

5,430 

5,520 

5,560 

5,680

May 30

78.62 

78.32 

78.04 

77.71 

77.42 

77.15

11,600 

11,000 

10,500 

9,880 

9,380 

8,950

June 5

75.78 

75.82 

75.86 

75.87 

75.87 

75.91

7,000 

7,060 

7,110 

7,120 

7,120 

7,170

June 11

77.10 

77.08 

77.02 

76.96 

76.86 

76.78

8,870 

8,840 

8,750 

8,660 

8,510 

8,390

June 17

74.27 

74.30 

74.30 

74.27 

74.22 

74.16

5,040 

5,080 

5,080 

5,040 

4,980 

4,900

Gage 

height Discharge

May 19

72.14 

72.16 

72.18 

72.18 

72.18 

72.22

2,460 

2,490 

2,510 

2,510 

2,510 

2,550

May 25

74.88 

75.QO 

75.10 

75.17 

75.22 

75.31

5,830 

5,990 

6,120 

6,210 

6,280 

6,390

May 31

76.91 

76.68 

76.48 

76.28 

76.08 

75.94

8,580 

8,240 

7,960 

7,680 

7,400 

7,210

June 6

76.01 

76.14 

76.23 

76.26 

76.28 

76.34

7,300 

7,490 

7,610 

7,650 

7,680 

7,770

June 12

76.70 

76.68 

76.44 

76.27 

76.08 

75.91

8,270 

8,240 

7,910 

7,670 

7,400 

7,170

June 18

74.10 

74.03 

73.95 

73.86 

73.78 

73.75

4,820 

4,730 

4,620 

4,510 

4,410 

4,370

Gage 

height Discharge

May 20

72.22 

72.25 

72.30 

72.39 

72.47 

72.62

2,550 

2,580 

2,640 

2,740 

2,830 

3,010

May 26

75.45 

75.60 

75.74 

75.94 

7S.04 

76.18

6,580 

6,770 

6,950 

7,210 

7,350 

7,540

June 1

75.88 

75.82 

75.75 

75.67 

75.58 

75.54

7,130 

7,080 

6,960 

6,860 

6,740 

6,690

June?

76.48 

76.61 

76.71 

76.77 

76.80 

76.87

7,960

8,140 

8,280 

8,380 

8,420 

8,520

June 13

75.78 

75.65 

75.51 

75.38 

75.25 

75.15

7,000 

6,840 

6,650 

6,480 

6,320 

6,180

June .19 n

73.75 

73.76 

73.74 

73.68 

73.68 

73.70

4,370 

4,380 

4,360 

4,290 

4,290 

4,310

Gage 

height Discharge

May 21

72.80 

72.96 

73.10 

73.20 

73.28 

73.44

3,230 

3,420 

3,590 

3,710 

3,810 

4,000

May 27 1

76.38 

76.61 

76.82 

77.05 

77.26 

77.49

7,820 

8,140 

8,450 

8,800 

9,130 

9,500

June 2

75.54 

75.54 

75.53 

75.50 

75.46 

75.47

6,690 

6,690 

6,680 

6,640 

6,590 

6,600

June 8

77.00 

77.18 

77.25 

77.25 

77.21 

77.21

8,720 

9,000 

9,110 

9,110 

9,050 

9,050

June 14

75.05 

74.95 

74.83 

74.71 

74,60 

74.50

6,060 

5,920 

5,770 

5,610 

5,470 

5,340

June 20

73.74 

73.77 

73.77 

73.76 

73.74 

73.72

4,360 

4,390 

4,390 

4,380 

4,360 

4,330

heT^t Disch^

Miy22

73.65 

73.34 

73.99 

74.08 

74.15 

74.20

4,250 

4,480 

4,680 

4,790 

4,880 

4,950

May 28

77.78 

78.16 

78.51 

78.80 

79.13 

79.38

10,000 

10,700 

11,400 

11,900 

12,600 

13,100

June 3

75.54 

75.60 

75.66 

75.70 

75.72 

75.75

6,690 

6,770 

6,850 

6,900 

6,930 

6,960

June 9

77.26 

77.31 

77.32 

77.27 

77.18 

77.15

9,130 

9,210 

9,220 

9,140 

9,000 

8,950

June 15

74.44 

74.39 

74.32 

74.25 

74.17 

74.14

5,260 

5,200 

5,110 

5,020 

4,910 

4,870

June 21

73.72 

73.72 

73.71 

73.70 

73.68 

73.66

4,330 

4,330 

4,320 

4,310 

4,290 

4,260

Supplemental record.- May 29, 6 a.m., 79.65 ft., 13,700 sec.-ft. 

824933 O - 49 - 12
154 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Wenatchee River at Plain, Wash.

Location.- Lat. 47°45'50", long. 120°39'30", in lot 8, sec. 12, T. 26 N., R. 17 E., at

Plain, a quarter of a mile downstream from Beaver Creek, 7% miles downstream from

Nason Creek, and 12 miles north of Leavenworth. Datum of gage is 1,805 feet above

mean sea level. ' 

Drainage area.- 591 square miles. 

Gage-height "record.- Water-stage recorder graph except for period 11:30 p.m. May 28 to

6 p.m. May 29, for which graph was drawn based on floodmark. 

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage

heights used to hundredths May 17 to June 21; half-tenths below and tenths above 5.5

feet May 1-16 and June 22 to July 31. 

Maxima.- May-June 1948: Discharge, 22,700 second-feet about 8 a.m. May 29 (gage height,

12.43 feet, from floodmark).

1910-29, 1931 to April 1948: Discharge observed, 20,800 second-feet Dec. 13, 1921

(gage height, 11.8 feet, site and datum then in use). 

Remarks.- Small diversion for irrigation from Chiwawa River is probably a small percent

of the flood discharge.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,030

1,920

2,030

2,200

2,200

2,490

3,000

3,000

3,070

3,070

Juhe

12,200

11,800

12,000

12,300

12,500

13,300

14,400

15,500

15,600

15,500

July

6,000

5,070

4,550

4,210

3,810

3,73C

3,730

3,430

3,070

3,070

Day

11

12

13

14

15

16

17

18

19

20

May

3,140

3,210

3,500

3,580

3,500

3,580

3,800

4,100

4,250

4,900

June

15,000

13,400

11,300

9,860

8,830

8,700

9,080

8,290

7,820

7,930

July

3,140

3,000

2,800

2,800

2,870

3,000

3,070

3,070

2,940

2,800

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ... . .. ................ ........ .....................

Runoff, in inches ............................................................................................................................

May

6,480

8,200

8,900

9,500

10,500

12,000

14,400

18,600

21,900

18,000

14,000

6,615

12.90

June

7,720

7,200

6,790

6,590

6,390

6,190

6,190

6,590

6,790

6,790

10,080

19.04

July

2,740

2,610

2,490

2,200

1,980

1,860

1,920

1,810

1,710

1,760

1,760

3,000

5.85

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

»*

K

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 4' 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.09 

5.12 

5.16 

5.16 

5.19 

5.24

3,720 

3,760 

3,830 

3,830 

3,870 

3,950

May 23

7.73 

7.80 

7.81 

7.79 

7.80 

7.82

8,790 

8,950 

8,970 

8,930 

8,950 

9,000

May 29

12.31 

12.43 

12.40 

12.17 

11.98 

11.79

22,300 

22,700 

22,600 

21,800 

21,100 

20,500

June 4

9.11 

9.13 

9.15 

9.15 

9.12 

9.10

12,300 

12,300 

12,400 

12,400 

12,300 

12,200

June 10

10.19 

10.20 

10.29 

10.30 

10.22 

10.17

15,400 

15,400 

15,700 

15,700 

15,400 

15,300

June 16

7.61 

7.65 

7.69 

7.71 

7.7.8 

7.83

8,510 

8,600 

8,700 

8,740 

8,900 

9,020

Gage 

height Discharge

May 18

5.31 

5.34 

5.34 

5.34 

5.35 

5.38

4,070 

4,110 

4,110 

4,110 

4,130 

4,180

May 24

7.88 

7.98 

8.08 

8.12 

8.13 

8.19

9,130 

9,370 

9,610 

9,710 

9,730 

9,880

May 30

11.55 

11.31 

11.06 

10.77 

10.50 

10.30

Ju

9.11 

9.19 

9.22 

9.26 

9.26 

9.28

19,700 

18,900 

18,100 

17,100 

16,300 

15,700

ne 5

12,300 

12,500 

12,600 

12,700 

12,700 

12,700

June 11

10.12 

10.10 

10.12 

10.06 

9.96 

9.87

15,200 

15,100 

15,700 

15,000 

14,700 

14,400

June 17

7.89 

7.91 

7.90 

7.86 

7.81 

7.73

9,160 

9,200 

9,180 

9,090 

8,970 

8,790

Gage 

height Discharge

May 19

5.41 

5.42 

5.43 

5.42 

5.42 

5.50

4,230 

4,240 

4,260 

4,240 

4,240 

4,380

May 25

8.30 

8.39 

8.46 

8.51 

8.53 

8.62

ME

10.06 

9.87 

9.70 

9.54 

9.39 

9.26

10,200 

10,400 

10,600 

10,700 

10,700 

11,000

iy31

15,000 

14,400 

13,900 

13,500 

13,000 

12,700

June 6

9.34 

9.42 

9.51 

9.56 

9.57 

9.59

12,900 

13,100 

13,400 

13,500 

13,500 

13,600

June 12

9.79 

9.67 

9.55 

9.38 

9.22 

9.07

14,200 

13,800 

13,500 

13,000 

12,600 

12,200

June 18

7.68 

7.61 

7.52 

7.41 

7.32 

7.31

8,670 

8,510 

8,310 

8,070 

7,870 

7,850

Gage 

height Discharge

May 20

5.58 

5.70 

5.80 

5.86 

6.00 

6.23

4,520 

4,720 

4,890 

5,000 

5,250 

5,680

May 26

8.75 

8.90 

9.00 

9.14 

9.23 

9.35

11,300 

11,700 

12,000 

12,300 

12,600 

12,900

June 1

9.21 

9.17 

9.12 

9.06 

8.98 

8.93

Ju

9.66 

9.78 

9.90 

9.99 

10.02 

10.05

12,500 

12,400 

12,300 

12,100 

11,900 

11,800

ne 7

13,800 

14,200 

14,500 

14^,800 

14,800 

14,900

June 13

8.95 

8.85 

8.76 

8.66 

8.54 

8.42

11,800 

11,600 

11,300 

11,100 

10,800 

10,400

June 19

7.32 

7.33 

7.32 

7.27 

7.23 

7.27

7,870 

7,900 

7,870 

7,770 

7,680 

7,770

Gage 

height Discharge

May 21

6.43 

6.58 

6.66 

6.72 

6.83 

7.04

6,060 

6,350 

6,510 

6,630 

6,850 

7,280

May 27

9.50 

9.66 

9.83 

10.02 

10.21 

10.40

13,400 

13,800 

14,300 

14,800 

15,400 

16,000

June 2

8.94 

8.96 

8.96 

8.92 

8.88 

8.88

Ju

10.11 

10.23 

10.33 

10.33 

10.29 

10.27

11,800 

11,900 

11,900 

11,800 

11,600 

11,600

ne8

15,100 

15,500 

15,800 

15,800 

15,700 

15,600

June 14

8.35 

8.28 

8.20 

8.10 

8.00 

7.90

10,300 

10,100 

9,900 

9,660 

9,420 

9,180

June 20

7.34 

7.39 

7.39 

7.36 

7.31 

7.29

7,920 

8,030 

8,030 

7,960 

7,850 

7,810

Gage 

height Discharge

May 22

7.27 

7.42 

7.52 

7.60 

7.64 

7.68

7,770 

8,090 

8,310 

8,490 

8,580 

8,670

May 28

10.61 

10.89 

11.19 

11.50 

11.81 

12.09

Ju

8.93 

8.99 

9.06 

9.10 

9.10 

9.10

Ju

10.27 

10.31 

10.33 

10.30 

10.26 

10.19

16,600 

17,500 

18,500 

19,500 

20,500 

21,500

ne 3

11,800 

11,900 

12,100 

12,200 

12,200 

12,200

ne9

15,600 

15,700 

15,800 

15,700 

15,600 

15,400

June 15

7.85 

7.82 

7.77 

7.70 

7.61 

7.60

9,060 

9,000 

8,880 

8,720 

8,510 

8,440

June 21

7.29 

7.28 

7.27 

7.24 

7.20 

7.14

7,810 

7,790 

7,770 

7,700 

7,620 

7,490
WENATCHEE RIVER BASIN 155

Wenatchee River at Peshastln, Wash.

Location.- Lat. 47°34'50", long. 120°37'00", in SEjSW^ sec. 8, T. 24 N., R. 18 E.,

1 mile northwest of Peshastin and 3^ miles upstream from Peshastin Creek. Datum of

gage is 1,028.04 feet above mean sea level, datum of 1929. 

Drainage area.- 1,000 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record. -"Stage-discharge relation defined by current-meter measurements below

25,000 second-feet and extended to peak stage.

Gage heights used to hundredths May 17 to June 21; half-tenths below and tenths

above 5.2 feet May 1-16 and June 22 to July 31. 

Maxima.- May-June 1948: Discharge, 32,200 second-feet 8 p.m. May 28, 1948 (gage height,

I5T§~7 feet).

1929 to April 1948: Discharge, 20,400 second-feet June 16, 1933 (gage height,

11.82 feet).

The flood of May 28, 1948 is the greatest known since 1905. 

Remarks.- Several diversions above station for Irrigation. Some regulation by power

plant in Tumwater Canyon.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,720

2,600

2,720

2,980

2,980

3,320

4,040

4,040

4,040

4,190

June

17,400

17,200

17,800

18,000

18,400

19,600

21,400

22,800

22,700

22,400

July

8,620

7,190

6,430

5,880

5,350

5,520

5,350

4,840

4,510

4,350

Day

11

12

13

14

15

16

17

18

19

20

May

4,190

4,350

4,670

4,840

4,670

4,840

5,220

5,590

5,820

7,150

June

2-2,700

20,100

16,600

14,400

12,700

12,900

13,600

12,100

11,400

11,600

July

4,510

4,350

4,040

4,040

4,040

4,190

4,190

4,350

4,190

3,890

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet............... .... ... ......................................................

Runoff, in inches ............................................................................................................................

May

9,240

11,500

12,200

13,800

15,600

17,800

22,100

29,200

30,900

25,400

19,700

9,430

10.87

June

11,400

10,400

9,700

9,480

9,260

9,040

8,830

9,260

9,700

9,700

14,750

16.46

July

3,820

3,600

3,390

3,050

2,790

2,600

2,540

2,540

2,360

2,360

2,360

4,230

4.88

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.94 

6.00 

6.04 

6.07 

6.08 

6.13

5,080 

5,180 

5,250 

5,300 

5,32£> 

5,400

May 23

9.40 

9.38 

9.38 

9.34 

9.40 

9.62

Mi

15.75 

15.68 

15.62 

15.46 

15.25 

14.97

Ju

11.61 

11.53 

11.47 

11.46 

11.62 

11.72

12,200 

12,200 

12,200 

12,100 

12,200 

12,800

iy29

31,700 

31,500 

31,200 

30,600 

29,900 

28,900

ne 4

18,100 

17,900 

17,700 

17,700 

18,100 

18,400

June 10

 13.11 

12.98 

12.86 

12.97 

13.10 

13.10

Ju

9.46 

9.47 

9.58 

9.78 

9.97 

10.10

22,600 

22,200 

21,900 

22,200 

22,600 

22,600

ne!6

16,400 

12,400 

12,700 

13,200 

13,700 

14,000

Gage 

height Discharge

May 18

6.19 

6.25 

6.25 

6.25 

6.27 

6.30

5,500 

5,610 

5,610 

5,610 

5,650 

5,700

May 24

9.85 

9.96 

10.02 

10.08 

10.28 

10.48

M

14.66 

14.32 

13.95 

13.56 

13.23 

12.94

Ju

11.72 

11.64 

11.57 

11.60 

11.80 

12.00

13,400 

13,600 

13,800 

13,900 

14,500 

15,000

»y30

27,800 

26,600 

25,400 

24,100 

23,000 

22,100

ne 5

18,400 

18,200 

18,000 

18,100 

18,700 

19,200

June 11

12.94 

12.91 

13.13 

13.35 

13.30 

13.10

22,100 

22,000 

22,700 

23,400 

23,200 

22,600

June 17

10.13 

10.08 

9.99 

9.88 

9.79 

9.68

14,100 

13,900 

13,700 

13,400 

13,200 

12,900

Gage 

height Discharge

May 19

6.31 

6.34 

6.37 

6.38 

6.38 

6.52

5,720 

5,770 

5,830 

5,840 

5,840 

6,100

May 25

10.58 

10.63 

10.63 

10.66 

10.90 

11.14

15,300 

15,400 

15,400 

15,500 

16,100 

16,800

May 31

12.65 

12.32 

12.05 

11.83 

11.72 

11.67

21,200 

20,200 

19,400 

18,700 

18,400 

18,300

June 6

12.03 

12.02 

11.99 

12.09 

12.37 

12.57

19,300 

19,300 

19,200 

19,500 

20,400 

21,900

June 12

12.81 

12.52 

12.24 

11.97 

11.76 

11.55

21,700 

20,800 

20,000 

19,200 

18,500 

17,900

June 18

9.56 

9.42 

9.30 

9.17 

9.12 

9.11

12,600 

12,300 

12,000 

11,700 

11,600 

11,600

Gage 

height Discharge

May 20

6.74 

6.96 

7.09 

7.23 

7.36 

7.61

6,510 

6,920 

7,170 

7,450 

7,710 

8,220

May 26

11.31 

11.37 

11.43 

11.50 

11.81 

12.13

17,300 

17,400 

17,600 

17,800 

18,700 

19,600

June 1

11.55 

11.41 

11.31 

11.22 

11.25 

11.33

17,900 

17,500 

17,300 

17,000 

17,100 

17,300

June 7

12.62 

12.60 

12.60 

12.69 

12.94 

13.12

21,100 

21,000 

21,000 

21,300 

22,100 

22,700

June 13

11.36 

11.19 

11.05 

10.91 

10.80 

10.69

17,400 

16,900 

16,500 

16,100 

15,800 

15,600

June 19

9.10 

9.04 

9.00 

8.98 

9.10 

9.15

11,500 

11,400 

11,300 

11,200 

11,500 

11,600

Gage 

height Discharge

May 21

7.81 

7.97 

8.06 

8.18 

8.40 

*8.62

8,640 

8,980 

9,170 

9,440 

9,920 

10,400

May 27

12.44 

12.70 

12.90 

13.10 

13.44 

13.97

Ju

11.30 

11.26 

11.20 

11.18 

11.32 

11.45

Ju

13.17 

13.13 

13.07 

13.11 

13.30 

13.38

20,600 

21 , 400 

22,000 

22,600 

23,700 

25,400

ne2

17,200 

17,100 

17,000 

16,900 

17 , 300 

17,600

ne8

22,800 

22,700 

22,500 

22,600 

23,200 

23,500

June 14

10.53 

10.47 

10.22 

10.06 

9.95 

9.86

15,100 

15,000 

14,300 

13,900 

13,600 

13,400

June 20

9.14 

9.16 

9.16 

9.12 

9.08 

9.07

11,600 

11,700 

11,700 

11,600 

11,500 

11,500

Gage 

height Discharge

May 22

8.83 

9.03 

9.14 

9.21 

9.32 

9.39

10,900 

11,400 

11,600 

11,800 

12,100 

12,200

May 28

14.34 

14.53 

14.91 

15.70 

15.87 

15.84

26,700 

27,300 

28,700 

31,500 

32,200 

32,000

June 3

11.48 

11. 4B 

11.48 

11.50 

11.56 

11.62

Ju

13.30 

13.18 

13.03 

12.98 

13.06 

13.16

17,700 

17,700 

17,700 

17,800 

18,000 

18,100

ne9

23,200 

22,900 

22,400 

22,200 

22,500 

22,800

June 15

9.79 

9.67 

9.56 

9.47 

9.40 

9.44

13,200 

12,900 

12,600 

12,400 

12,200 

12,300

June 21

9.06 

9.08 

9.03 

9.02 

8.97 

8.90

11,400 

11,500 

11,400 

11,300 

11,200 

11,100

Supplemental record.- May 28, 6 p.m., 15.83 ft., 32,000 sec.-ft.
156 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Chiwawa River near Plain, Wash.

Location.- Lat. 47°50'30", long. 120°39'40", in SEj sec. 13, T. 27 N., R. 17 E., half a 

mile upstream from Goose Creek, 6 miles north of Plain, 7 miles upstream from mouth, 

and 11 miles northeast of Chiwaukum. Datum of gage is 2,100 feet above mean sea 

level (from river-profile map).

Drainage area.- lt>9 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage 

heights used to hundredths.

Maxima.- May-June 1948: Discharge, 5,880 second-feet 3 a.m. May 29 (gage height, 9.17

1911-14, 1936 to April 1948: Discharge, 3,210 second-feet May 25, 26, 1938 (gage 

height, 7.66 feet). 

Remarks.- No diversions or regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

453

458

514

536

536

656

734

734

767

829

June

3,250

3,210

3,260

3,300

3,430

3,640

4,000

4,250

4,080

4,080

July

1,460

1,210

1,090

1,050

962

983

913

836

767

780

Day

11

12

13

14

15

16

17

18

19

20

May

843

864

962

927

913

913

956

1,030

1,100

1,330

June

3,910

3,400

2,850

2,470

2,240

2,300

2,490

2,240

2,120

2,260

July

808

767

722

728

748

774

774

760

741

715

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..... . .... .... ........................

Runoff, in inches .......................... .................... ................. ..........................................................

May

1,790

2,310

2,570

2,710

2,840

3,380

4,170

4,980

5,580

4,530

3,520

1,756

11.98

June

2,100

1,860

1,770

1,710

1,700

1,650

1,620

1,710

1,760

1,710

2,679

17.69

July

741

696

656

560

508

486

508

464

453

475

475

762

5.20

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.54 

5.54 

5.54 

5.54 

5.57 

5.63

948 

948 

948 

948 

969 

1,010

May 23

7.17 

7.18 

7.17 

7.14 

7.17 

7.19

,580 

,590 

,580 

,540 

,580 

,610

May 29

9.14 

9.12 

9.06 

8.93 

8.87 

8.88

Ju

7.69 

7.70 

7.70 

7.70 

7.70 

7.71

5,820 

5,780 

5,660 

5,400 

5,280 

5,300

ne4

3,290 

3,300 

3,300 

3,300 

3,300 

3,310

June 10

8.12 

8.19 

8.29 

8.26 

8.20 

8.11

Ju

6.84 

6.90 

6.92 

7.00 

7.02 

7.08

3,950 

4,060 

4,230 

4,180 

4,080 

3,940

ne!6

2,180 

2,250 

2,270 

2,370 

2,390 

2,470

Gage 

height Discharge

May 18

5.66 

5.65 

5.63 

5.64 

5.68 

5.73

1,040 

1,030 

1,010 

1,020 

1,050 

1,090

May 24

7.22 

7.27 

7.29 

7.29 

7.28 

7.29

?,650 

2,710 

2,740 

2,740 

2,720 

2,740

May 30

8.80 

8.55 

8.24 

8.34 

8.21 

8.06

5,150 

4,690 

4,150 

4,320 

4,100 

3,860

June 5

7.74 

7.78 

7.81 

7.83 

7.83 

7.75

3,360 

3,420 

3,460 

3,500 

3,500 

3,380

June 11

8.08 

8.11 

8.15 

8.12 

8.05 

7.97

3,890 

3,940 

4,000 

3,950 

3,840 

3,710

June 17

7.12 

7.13 

7.12 

7.10 

7.08 

7.00

2,520 

2,530 

2,520 

2,490 

2,470 

2,370

Gage 

height Discharge

May 19

5.75 

5.74 

5.73 

5.71 

5.71 

5,79

1,110 

1,100 

1,090 

1,080 

1,080 

1,140

May 25

7.32 

7.33 

7.38 

7.38 

7.41 

L_ 7.47

M,

7.96 

7.89 

7.83 

7.77 

7.73 

7.69

Ju

7.81 

7.87 

7.95 

8.01 

8.01 

7.98

2,780 

2,790 

2,850 

2,850 

2,890 

2,980

iy3l

3,700 

3,580 

3,500 

3,400 

3,340 

3,290

ne6

3,460 

3,560 

3,680 

3,780 

3,780 

3,730

June 12

7.89 

7.83 

7.78 

7.73 

7.63 

7.51

3,580 

3,500 

3,420 

3,340 

3,200 

3,030

June 18

6.99 

6.94 

6.89 

6.83 

6.80 

6.79

2,360 

2,300 

2,240 

2,170 

2,130 

2,120

Gage 

height Discharge

May 20

5.87 

5.94 

5.99 

6.03 

6.17 

6.28

1,210 

1,270 

1,310 

1,350 

1,470 

1,580

May 26

7.55 

7.68 

7.77 

7.87 

7.90 

7.97

3,090 

3,270 

3,400 

3,560 

3,600 

3,710

June 1

7.68 

7.67 

7.67 

7.65 

7.64 

7.63

3,270 

3,260 

3,260 

3,230 

3,220 

3,200

June 7

8.02 

8.15 

8.21 

8.22 

8.21 

8.21

3,790 

4,000 

4,100 

4,110 

4,100 

4,100

June 13

7.46 

7.42 

7.38 

7.33 

7.28 

7.23

2,960 

2,910 

2,850 

2,790 

2,720 

2,660

June 19

6.81 

6.81 

6.80 

6.77 

6.77 

6.82

2,140 

2,140 

2,130 

2,100 

2,100 

2,150

Gage 

height

M

6.39 

6.44 

6.45 

6.48 

6.62 

6.78

Discharge

iy21

1,690 

1,740 

1,750 

1,780 

1,930 

2,110

May 27

8.07 

8.17 

8.26 

8.38 

8.40 

8.47

Ju

7.64 

7.66 

7.66 

7.63 

7.62 

7.61

Ju

8.27 

8.38 

8.39 

8.34 

8.23 

8.18

3,870 

4,030 

4,180 

4,390 

4,420 

4,550

ne2

3,220 

3,240 

3,240 

3,200 

3,190 

3,170

ne8

4,200 

4,390 

4,400 

4,320 

4,130 

4,050

June 14

7.19 

7.15 

7.09 

7.02 

6.97 

6.93

2,610 

2,560 

2,480 

2,390 

2,330 

2,290

June 20

6.90 

6.97

6.97 

6.93 

6.87 

6.83

2,250 

2,330 

2,330 

2,290 

2,210 

2,170

Gage 

height Discharge

May 22

6.86 

6.93 

6.95 

6.97 

7.03 

7.11

2,200 

2,290 

2,310 

2,330 

2,410 

2,500

May 28

8.53 

8.58 

8.60 

8.83 

9.00 

9.10

4,650 

4,740 

4,780 

5,210 

5,540 

5,740

June 3

7.64 

7.67 

7.68 

7.69 

7.69 

7.68

Ju

8.18 

8.23 

8.24 

8.21 

8.18 

8.13

3,220 

3,260 

3,270 

3,290 

3,290 

3,270

ne9

4,050 

4,130 

4,150 

4,100 

4,050 

3,970

June 15

6.93 

6.92 

6.90 

6.87 

6.84 

6.83

2,290 

2,270 

2,250 

2,210 

2,180 

2,170

June 21

6.81 

6.80 

6.78 

6.76 

6.72 

6.68

2,140 

2,130 

2,110 

2,090 

2,040 

2,000

Supplemental record.- May 28, 5 a.m., 8.35 ft., 4,340 sec.-ft.; May 29, 

ft., 5,880 sec.-ft.; May 30, 1 p.m., 8.50 ft., 4,600 sec.-ft.

3 a.m., 9.17
WENATCHEE RIVER BASIN 157

Icicle Creek above Snow Creek, near Leavenworth, Wash.

Location.- Lat. 47 a 32'25", long. 12C a 42'55", in SE£ sec. 28, T. 24 N., R. 17 E., threeeighths of a mile upstream from Snow Creek and 4-J miles southwest of Leavenworth. 

Drainage area.- 193 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

6,910 second-feet and extended to^peak stage on basis of slope-area measurement. 

Maxima.- May-June 1948: Discharge, 17,500 second-feet 3 p.m. May 28 (gage height, 13.93

feet), by slope-area method.

1936 to April 1948: Discharge, 4,320 second-feet June 3, 1937 (gage height, 10.10

feet). 

Remarks.- No diversion. Some regulation in headwater lakes for irrigation.

Mean discharge, in second-feet, 19&8

Day

1

2

3

4

5

6

7

8

9

10

May

475

448

504

518

518

658

794

736

717

717

June

3,590

3,850

4,260

4,060

4,240

4,870

5,460

5,650

5,170

4,820

July

1,820

1,510

1,400

1,320

1,150

1,250

1,220

1,050

1,000

1,000

Day

11

12

13

14

15

16

17

18

19

20

May

699

736

834

794

794

875

1,020

1,060

1,090

1,820

June

5,170

4,040

3,460

3,110

2,850

3,260

3,260

2,710

2,780

2,810

July

1,030

960

895

895

895

915

915

1,000

895

835

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet..... ............................... .... ................ ..................

Runoff, in inches ............................................................................................................................

May

2,420

2,770

2,600

3,630

4,350

5,260

7,590

13,600

6,770

4,050

3,500

2,334

13.94

June

2,830

2,530

2,270

2,270

2,190

2,110

2,110

2,350

2,440

2,350

3,429

19.82

July

795

755

715

628

577

546

562

546

517

517

532

924

5.52

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

L8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.01 

6.03 

6.02 

6.01 

6.08 

6.17

1,010 

1,020 

1,010 

1,010 

1,040 

1,080

May 23

8.53 

8.46 

P. 36 

8.35 

8.52 

9.03

M,

12.30 

11.87 

11.53 

11.17 

10.83 

10.51

2,620 

2,550 

2,450 

2,440 

2,610 

3,120

iy29

8,320 

7,190 

6,500 

5,870 

5,340 

4,900

June 4

9.80 

9.70 

9.57 

9.60 

10.00 

10.11

4,080 

3,980 

3,850 

3,880 

4,300 

4,420

June 10

10.70 

10.40 

10.18 

10.22 

10.45 

10.50

Ju

8.61 

8.65 

8.95 

9.23 

9.41 

9.41

5,160 

4,760 

4,500 

4,540 

4,820 

4,890

ne!6

2,900 

2,940 

3,230 

3,510 

3,690 

3,690

Gage 

height Discharge

May 18

6.18 

S.13 

5.08 

6.05 

6.11 

6.14

1,090 

1,060 

1,040 

1,030 

1,050 

1,070

May 24

9.33 

9.34 

9.26 

9.49 

9.92 

10.04

3,450 

3,460 

3,380 

3,630 

4,140 

4,290

May 30

10.20 

9.88 

9.60 

9.43 

9.45 

9.42

Ju

10.00 

9.80 

9.64 

9.71 

10.20 

10.50

4,520 

4,170 

3,880 

3,710 

3,730 

3,700

ne 5

4,300 

4,080 

3,920 

3,990 

4,520 

4,890

June 11

10.30 

10.38 

10.90 

11.10 

10.93 

10.60

4,640 

4,740 

5,450 

5,760 

5,500 

5,020

June 17

9.30 

9.11 

8.96 

8.80 

8.70 

8.61

3,580 

3,390 

3,240 

3,080 

2,980 

2,900

Gage 

height Discharge

May 19

6.13 

6.09 

6.10 

6.13 

6.30 

6.67

1,060 

1,050 

1,050 

1,060 

1,140 

1,320

May 25

10.05 

9.91 

9.73 

9.94 

10.48 

10.70

4,300 

4,130 

3,920 

4,170 

4,850 

5,160

May 31

9.31 

9.19 

9.07 

9.05 

9.26 

9.40

3,590 

3,470 

3,350 

3,330 

3,540 

3,680

June 6

10.44 

10.20 

10.07 

10.40 

10.90 

11.08

4,810 

4,520 

4,380 

4,760 

5,450 

5,730

June 12

10.25 

9.89 

9.52 

9.41 

9.40 

9.34

4,580 

4,180 

3,800 

3,690 

3,680 

3,620

T June 18

8.51 

8.37 

8.24 

8.24 

8.41 

8.51

2,810 

2,680 

2,570 

2,570 

2,720 

2,810

Gage 

height Discharge

May 20

7.13 

7.43 

7.47 

7.60 

8.03 

8.25

1,560 

1,740 

1,760 

1,850 

2,160 

2,360

May 26

10.70 

10.57 

10.43 

10.73 

11.09 

11.40

5,160 

4,980 

4,790 

5,200 

5,740 

6,260

June 1

9.40 

9.30 

9.17 

9.11 

9.37 

9.59

Jl

11.00 

10.80 

10.57 

10.67 

11.10 

11.40

3,680 

3,580 

3,450 

3,390 

3,650 

3,870

ne 7

5,600 

5,300 

4,980 

5,120 

5,760 

6,260

June 13

9.26 

9.20 

9.17 

9.12 

9.10 

9.06

3,540 

3,480 

3,450 

3,400 

3,380 

3,340

June 19

8.46 

8.35 

8.28 

8.45 

8.69 

8.71

2,760 

2,660 

2,600 

2,760 

2,970 

2,990

Gage 

height Discharge

May 21

8.26 

8.21 

8.13 

8.24 

8.53 

8.73

2,360 

2,320 

2,250 

2,350 

2,620 

2,820

May 27

11.73 

11.83 

11.75 

12.02 

12.45 

12.83

6,890 

7,110 

6,940 

7,550 

8,820 

10,200

June 2

9.62 

9.56 

9.41 

9.33 

9.67 

10.01

3,900 

3,840 

3,690 

3,610 

3,950 

4,310

June 8

11.15 

10.80 

10.65 

11.00 

11.22 

11.22

5,840 

5,300 

5,090 

5,600 

5,950 

5,950

June 14

9.00 

8.98 

8.72 

8.68 

8.71 

8.70

3,280 

3,260 

3,000 

2,960 

2,990 

2,980

June 20

8.64 

8.54 

8.46 

8.40 

8.44 

8.50

2,930 

2,840 

2,760 

2,710 

2,750 

2,800

Gage 

height Discharge

May 22

8.78 

8.73 

8.64 

8.61 

8.66 

8.63

2,870 

2,820 

2,730 

2,700 

2,750 

2,720

May 28

13.18 

13.50 

13.75 

13.85 

13.30 

J.2.75

Ju

10.12 

10.08 

9.94 

9.85 

9.86 

9.86

11,900 

14,000 

15,900 

16,800 

12,600 

9,910

ne3

4,430 

4,390 

4,230 

4,140 

4,150 

4,150

June 9

10.90 

10.55 

10.33 

10.50 

10.81 

10.90

5,450 

4,960 

4,680 

4,890 

5,320 

5,450

June 15

8.62 

8.52 

8.42 

8.47 

8.61 

8.66

2,910 

2,820 

2,730 

2,770 

2,900 

2,940

June 21

8.56 

8.58 

8.58 

8.53 

8.48 

8.40

2,850 

2,870 

2,870 

2,830 

2,780 

2,710

Supplemental record.- May 28, 3 p.m., 13.93 ft., 17,500 sec.-ft.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Crab Creek Basin

Crab Creek at Irby, Wash.

Location.- Lat. 47°21'30", long. 118 0 51'00", in NW£ sec. 31, T. 22 N., R. 32 E., 8 feet

upstream from county road bridge at Irby, 5 miles downstream from Lake Creek, and

7 miles west of Odessa. f 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage

heights used to hundredths May 1 to June 21; half-tenths above 3.2 feet and

hundredths below June 22 to July 31. 

Maxima.- May-June 1948: Discharge, 1,190 second-feet 5 a.m. June 12, 1948 (gage height,

6T98 feet).

1942 to April 1948: Discharge, 965 second-feet Feb. 25, 1946 (gage height, 6.65

feet). 

Remarks.- No regulation. Some diversion above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

35

35

38

44

46

49

48

41

39

42

June

591

561

519

545

510

456

415

379

352

364

July

194

184

177

169

164

158

154

153

132

120

Day

11

12

13

14

15

16

17

18

19

20

May

45

50

55

56

58

66

72

77

86

96

June

574

1,060

732

620

541

562

517

499

436

373

July

113

116

120

116

107

94

90

84

82

80

Day

21

22

23

24

25

26

27

28

29

80

31

Monthly mean discharge, in second-feet ........ ............... ............. ......................

Runoff, in inches ....................................................... ... ................................................................

May

101

112

133

188

377

601

545

448

428

434

522

June

333

308

292

278

263

250

237

220

210

205

440

July

76

71

64

64

68

63

66

78

78

76

76

109

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

« 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.56 

2.56 

2.57 

2,57 

2.57 

2.58

71 

71 

73 

73 

73 

75

May 23

2.84 

2.84 

2.85 

2.88 

2.90 

2.93

Mi

4.82 

4.82 

4.80 

4.77 

4.75 

4.77

128 

128 

130 

136 

140 

145

iy29

434 

434 

430 

424 

420 

424

June 4

5.22 

5.30 

5.34 

5.35 

5.34 

5.29

525 

545 

555 

558 

555 

542

June 10

4.35 

4.37 

4.49 

4.54 

4.57 

4.58

342 

346 

368 

378 

384 

386

June 16

5.31 

5.50 

5.47 

5.35 

5.29 

5.24

548 

600 

591 

558 

542 

530

Gage 

height Discharge

May 18

2.58 

2.59 

2.60 

2.60 

2.60 

2.60

75 

76 

78 

78 

78 

78

May 24

3.01 

3.10 

3.20 

3.33 

3.45 

3.59

160 

174 

188 

203 

215 

230

May 30

4.75 

4.77 

4.81 

4.84 

4.89 

4.95

Ju

5.25 

5.20 

5.16 

5.12 

5.08 

5.04

420 

424 

432 

438 

448 

460

ne5

532 

520 

510 

500 

490 

480

June 11

4.58 

4.60 

4.72 

5.52 

6.33 

6.81

386 

390 

414 

606 

897 

1,110

June 17

5.21 

5.19 

5.15 

5.16 

5.19 

5.20

522 

518 

503 

510 

518 

520

Gage 

height Discharge

May 19

2.62 

2.63 

2.64 

2.65 

2.67 

2.68

82 

84 

86 

88 

92 

94

May 25

3.77 

4.02 

4.41 

4.88 

5.21 

5.39

Mi

5.04 

5.13 

5.22 

5.31 

5.36 

5.41

Ju

5.00 

4.97 

4.93 

4.89 

4.86 

4.83

252 

288 

353 

446 

522 

568

»y3l

480 

502 

525 

548 

560 

573

ne6

470 

464 

456 

448 

442 

436

June 12

6.96 

6.90 

6.74 

6.57 

6.41 

6.25

1,180 

1,150 

1,030 

1,000 

930 

865

June 18

5.19 

5.17 

5.12 

5.08 

5.04 

4.99

518 

512 

500 

490 

480 

468

Gage 

height Discharge

May 20

2.70 

2.69 

2.69 

2.69 

2.69 

2.69

98 

96 

96 

96 

96 

96

May 26

5.47 

5.50 

5.52 

5.54 

5.54 

5.50

591 

600 

606 

612 

612 

600

June 1

5.47 

5.49 

5.49 

5.48 

5.47 

5.44

Ju

4.79 

4.75 

4.73 

4.69 

4.66 

4.63

591 

597 

597 

594 

591 

582

ne 7

428 

420 

416 

408 

402 

396

June 13

6.12 

5.97 

5.85 

5.77 

5.72 

5.69

813 

754 

712 

684 

667 

657

June 19

4.95 

4.90 

4.84 

4.78 

4.68 

4.64

460 

450 

438 

426 

406 

398

Gage 

height Discharge

May 21

2.70 

2.71 

2.71 

2.72 

2.73 

2.74

98 

100 

100 

102 

105 

107

May 27

5.43 

5.35 

5.30 

5.24 

5.17 

5.09

579 

558 

545 

530 

512 

492

June 2

5.42 

5.39 

5.37 

5.33 

5.31 

5.27

Ju

4.60 

4.58 

4.55 

4.52 

4.48 

4.45

Ju

5.68 

5.63 

5.58 

5.52 

5.45 

5.41

576 

568 

562 

552 

548 

538

ne8

390 

386 

380 

374 

366 

360

ne 14

654 

639 

624 

606 

585 

573

June 20

4.59 

4.55 

4.50 

4.47 

4.44 

4.40

388 

380 

370 

364 

359 

351

Gage 

height

M:

2.74 

2.75 

2.76 

2.76 

2.79 

2.81

Discharge

iy22

107 

109 

111 

111 

118 

122

May 28

4.99 

4.92 

4.87 

4.83 

4.78 

4.78

468 

454 

444 

436 

426 

426

June 3

5.24 

5.21 

5.18 

5.15 

5.16 

5.22

L Ju

4.43 

4.43 

4.41 

4.38 

4.39 

4.36

530 

522 

515 

508 

510 

525

ne 9

357 

357 

353 

347 

349 

344

June 15

5.36 

5.38 

5.30 

5.20 

5.16 

5.20

560 

565 

545 

520 

510 

520

June 21

4.38 

4.34 

4.29 

4.24 

4.23 

4.23

347 

340 

331 

323 

321 

321

Supplemental record.- June 10, 2 a.m., 4.38 ft., 347 sec.-ft., 6 a.m., 4.33 ft., 338 

sec .-ft.; June 12, 5 a.m., 6.97 ft., 1,180 sec.-ft.; June 16, 10 a.m., 5.55 ft., 615

sec.-ft.
CRAB CREEK BASIN

Crab Creek near Moses Lake, Wash.

Location.- Lat. 47 a ll'25", long. 119°16'00", in SW£SE£ sec. 26, T. 20 N., R. 28 E.,

3 miles upstream from Parker Horn and 4 milea north of Hoses Lake. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.-~Stage-discharge relation defined by current-meter measurements.

Gage heights used to hundredths. Shifting-control method used June 5-15, June 28 to

July 31. 

Maxima.- May-June 1948: Discharge, 618 second-feet 2:30 p.m. June 16 (gage height,

3775 feet).

1942 to April 1948: Discharge, 456 second-feet Mar. 2, 1946 (gage height, 3.47

feet). 

Remarks.- Some diversion in upper Crab Creek Basin for irrigation. Most of flow

from upper basin passes this station under ground. No regulation. 

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May June

0

0

0

0

45

144

174

190

200

215

July

187

177

165

147

138

134

121

119

125

110

Day

11

12

13

14

15

16

17

18

19

20

May June

237

227

254

350

472

566

550

516

488

477

July

92

82

73

66

56

48

43

41

38

36

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet , ......... .. .... . .... .. ... ... . ..... ....

Runoff, in inches ...................................... ............... ....................................................................

May

-

June

460

422

393

362

333

304

280

260

245

226

July

32

27

22

18

15

12

10

9.0

7.4

5.4

4.3

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

»*

3

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

June 4

June 10

2.81 

2.81 

2.90 

2.91_,

210 

210 

234 

237

June 16

3.59 

3.65 

3.68 

3.74 

3.70 

3.67

520 

555 

573 

611 

585 

567

Gage 

height Discharge

June 5

2.27 

2.36 

2.42

0 

0 

0 

88 

106 

119

June 11

2.92 

2.92 

2.90

2.87

243 

243 

237

229

June 17

3.64 

3.62

549 

537

Gage 

height Discharge

June 6

2.47 

2.51 

2.54 

2.57 

2.60 

2.63

129 

138 

145 

151 

158 

165

June 12

2.85 

2.85

226 

226

June 18

3.58 

3.55

514 

498

Gage 

height Discharge

June 7

2.67 

^2.70

174 

182

June 13

2.86 

2.89 

2.94 

2.97 

3.02 

3.06

231 

240 

254 

263 

277 

289

June 19

3.53 

3.52

486 

481

Gage 

height Discharge

June 8

2.74 

2.75

192 

194

June 14

3.25 

3.37

354 

401

June 20

3.51 

3.51

476 

476

Gage 

height Discharge

June 9

2.76 

2.77 

2.78 

2.77 

2.76 

2.76

197 

200 

202 

 200 

197 

197

June 15

3.53 

3.57 

3.58 

3.59

481 

503 

503 

514

June 21

3.48 

3.45

460 

446

Supplemental record.- June 5, 1 p.m., 2.07 ft., 53 sec.-ft., 2 p.m., 2.18 ft., 72 

sec.-ft.j June 9, 10 p.m., 2.82 ft., 213 sec.-ft.; June 10, 2 a.m., 2.80 ft., 207 sec.- 

ft.; June 16, 2:30 p.m., 3.75 ft., 618 sec.-ft.

Crab Creek near Warden, Wash.

Location.- Lat. 46°58'20", long. 119°15'40", in SE^SE^ sec. 11, T. 17 N. , R. 28 E., 

three-quarters of a mile downstream from Lind Coulee and 10 miles west of Warden.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

25 second-feet and extended to peak stage. Gage heights used to hundredths. 

Shifting-control method used May 5-30, June 7-11, June 14 to July 31.

Maxima.- May-June 1948: Discharge, 28 second-feet 6 p.m. May 28 (gage height, 8.45

1909-12, 1942 to April 1948: Discharge, 3,000 second-feet Feb. 7, 1943 (gage 

height, 4,25 feet, datum then in use).

Remarks.- Many small -diversions for irrigation. Some regulation by Moses Lake. Flow 

regulated by construction of Potholes Dam.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

16

15

16

16

15

16

17

19

22

21

June

17

16

15

15

15

15

16

15

14

15

July

4.2

5.2

8.3

8.8

11

12

12

15

15

16

Day

11

12

13

14

15

16

17

18

19

20

May

17

17

18

21

17

16

17

21

20

18

June

17

23

22

20

17

16

16

16

16

16

July

16

17

16

14

9.4

8.8

12

8.8

8.3

8.3

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ..... ...................................... .. ... ... ... ............. .................................................

May

18

17

18

18

22

21

18

20

23

20

18

18.3

June

11

10

7.8

6.5

6.2

5.2

5.2

5.6

5.2

3.8

13.3

July

6.6

6.6

6.2

6.2

6.2

6.6

6.6

6.6

6.6

6.2

6.2

9.57
160 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Crab Creek near Smyrna, Wash.

Location.- Lat. 46°50'35", long. 119°36'25", in SE£ sec. 30, T. 16 N., R. 26 E., at

county road bridge, 2j miles east of Smyrna. 

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.^- May-June 1948: Discharge, 19.8 second-feet 3 a.m. to noon May 28 (gage

height, 1.97 feet).

1942 to April 1948: Discharge, 3,300 second-feet Feb. 8, 1943 (gage height,

7.5 feet, estimated by observer). 

Remarks.- Many diversions above station for irrigation. Some regulation by Moses T -.1.0

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

8.1

6.7

7.4

7.8

8.1

9.1

8.8

7.6

9.4

12

June

14

12

9.8

9.6

9.7

9.1

8.2

7.3

6.4

5.6

July

0.5

.4

.4

.3

.5

.8

.6

.6

.6

.6

Day

11

12

13

14

15

16

17

18

19

20

May

12

11

12

10

9.6

10

11

9.5

12

14

June

11

8.8

8.8

9.9

9.3

9.4

9.6

9.6

8.4

7.4

July

0.8

.7

.6

.5

.4

.4

.4

.4

.6

1.0

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . . ........ .... ............................................

Runoff, in inches .............................................. .............................................................................

May

12

10

11

13

13

12

19

20

18

17

16

11.5

June

6.8

6.9

5.6

4.3

3.2

2.2

1.7

1.3

1.0

.6

7.25

July

1.1

.9

.6

.6

.5

.4

.4

.3

.3

.3

.4

.55

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

SH

g 

K

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

1.73 

1.73 

1.72 

1.72 

.1.70 

1.68

11 

11 

11 

11 

10 

9.6

May 23

1.72 

1.73 

1.73 

1.73 

1.75 

1.78

11 

11 

11 

11 

12 

13

May 29

1.96 

1.94 

1.93 

1.91 

1.90 

1.89

19 

19 

18 

17 

17 

17

June 4

1.67 

1.68 

1.63 

1.68 

1.68 

1.68

9.4 

9.6 

9.6 

9.6 

9.6 

9.6

June 10

1.50 

1.50 

1.50 

1.50 

1.49 

1.67

Ju

1.66 

1.69 

1.69 

1.68 

1.66 

1.6S

5.4 

5.4 

5.4 

5.4 

5.3 

9.4

ne!6

9.1 

9.9 

9.9 

9.6 

9.1 

9.1

Gage 

height Discharge

May 18

1.68 

1.68 

1.68 

1.68 

1.66 

1.6S

9.6 

9.6 

9.6 

9.6 

9.1 

9.1

May 24

1.78 

1.78 

1.79 

1.79 

1.78 

1.78

13 

13 

13 

13 

13 

13

May 30

1.89 

1.90 

1.91 

1.90 

1.89 

1.88

Ju

1.68 

1.68 

1.69 

1.69 

1.68 

1.67

17 

17 

17 

17 

17 

16

ne 5

9.6 

9.6 

9.9 

9.9 

9.6 

9.4

June 11

1.73 

1,74 

1.74 

1.70 

1.68 

1.67

11 

12 

12 

10 

9.6 

9.4

June 17

1.67 

1.68 

1.69 

1.69 

1.68 

1.68

9.4 

9.6 

9.9 

9.9 

9.6 

9.6

Gage 

height Discharge

May 19

1.67 

1.69 

1.78 

1.78 

1.80 

1.82

9.4 

9.9 

13 

13 

13 

14

May 25

1.78 

1.79 

1.80 

1.79 

1.78 

1.77

13 

13 

13 

13 

13 

12

May 31

1.88 

1.88 

1.88 

1.87 

1.86 

1.84

16 

16 

16 16 ' 

16 

15

June 6

1.67 

1.67 

1.66 

1.6S 

1.65 

1.64

9.4 

9.4 

9.1 

9.1 

8.8 

8.6

June 12

1.66 

1.66 

1.66 

1.64 

1.62 

1.61

9.1 

9.1 

9.1 

8.6 

8.1 

7.8

June 18

1.67 

1.67 

1.70 

1.69 

1.67 

1.66

9.4 

9.4 

10 

9.9 

9.4 

9.1

Gage 

height Discharge

May 20

1.83 

1.83 

1.82 

1.82 

1.81 

1.80

14 

14 

14 

14 

14 

13

May 26

1.76 

1.76 

1.76 

1.77 

1.77 

1.90

Ju

1.82 

1.82 

1.81 

1.80 

1.79 

1.77

12 

12 

12 

12 

12 

17

ne 1

14 

14 

14 

13 

13 

12

June 7

1.63 

1.63 

1.63 

1.62 

1.61 

1.60

8.3 

8.3 

8.3 

8.1 

7.8 

7.6

June 13

1.62 

1.64 

1.66 

1.66 

1.67 

1.68

8.1 

8.6 

9.1 

9.1 

9.4 

9.6

June 19

1.65 

1.65 

1.65 

1.63 

1.59 

1.58

8,8 

8.8 

8.8 

8.3 

7.4 

7.1

Gage 

height Discharge

May 21

1.80 

1.79 

1.78 

1.75 

1.72 

1.72

13 

13 

13 

12

11 

11

May 27

1.94 

1.94 

1.94 

1.94 

1.93 

1.96

19 

19 

19 

19 

18 

19

June 2

1.76 

1.76 

1.76 

1.75 

1.74 

1.72

12 

12 

12 

12 

12 

11

June 8

1.60 

1.60 

1.60 

1.58 

1.57 

1.57

7.6 

7.6 

7.6 

7.1 

6.9 

6.9

June 14

1.68 

1.69 

1.70 

1.70 

1.69 

1.69

9.6 

9.9 

10 

10 

9.9 

9.9

June 20

1.58 

1.59 

1.60 

Io60 

1.59 

1.58

7.1 

7.4 

7.6 

7.6 

7.4 

7.1

Gage 

height Discharge

May 22

1.70 

1.69 

1.70 

1.70 

1.70 

1.70

10 

9.9 

10 

10 

10 

10

May 28

1.97 

1.97 

1.97 

1.97 

1.97 

1.96

20 

20 

20 

20 

20 

19

June 3

1.71 

1.71 

1.68 

1.68 

1.67 

1.67

Ju

1.57 

1.57 

1.56 

1.54 

1.51 

1.51

10 

10 

9.6 

9.6 

9.4 

9.4

ne9

6.9 

6.9 

6.7 

6.2 

5.6 

5.6

June 15

1.68 

1.68 

1.68 

1.66 

1.64 

1.63

9.6 

9.6 

9.6 

9.1 

8.6 

8.3

June 21

1.57 

1.57 

1.57 

1.56 

1.56 

1.57

6.9 

6.9 

6.9 

6.7 

6,7 

6.9

pigmental record.- June 10, 10 p.m., 1.51 ft., 5.6 sec.-ft.
CRAB CREEK BASIN 161

Park Creek below Park Lake, near Coulee City, Wash.

*

Location.- Lat. 47°34', long. 119 0 25', in SW£ sec. 15, T. 24 N., R. 27 E., 100 feet upstream from mouth, 500 feet downstream from Park Lake, and 65- miles southeast of 

Coulee City.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths. Shifting-control method used May 1 to July 31.

Maxima.- May-June 1948: Discharge, 13.6 second-feet 8 to 10 a.m. June 12 (gage height,

1945 to April 1948: Discharge, 25 second-feet Feb. 10, 1948 (gage height, 2.67 

feet). 

Remarks.- No regulation. Some diversion during summer months for irrigation above Park

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

8.9

8.6

8.9

8.9

8.9

9.4

9.4

9.1

9.4

9.6

June

12

12

12.5

12

11.5

12.5

12.5

12

12

12

July

7.0

6.2

6.2

5.8

5.6

5.6

5.6

5.0

5.2

5.2

Day

11

12

13

14

15

16

17

18

19

20

May

9.6

9.6

9.9

9.6

9.6

9.4

9.4

9.1

9.9

10.5

June

12.5

13

12.5

12.5

12

12.5

12.5

12.5

12

11.5

July

4.8

4.7

4.7

4.3

4.7

4.5

4.3

4.2

4.3

4.0

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..... . .............................

Runoff, in inches ............................................................................................................................

May

10

9.9

9.9

10

10

9.6

9.6

10.5

11.5

11.5

12

9.75

June

11.5

10.5

10.5

10

9.6

9.4

9.1

8.6

8.4

7.9

11.3

July

4.0

4.0

3.5

3.2

3.2

3.4

3.1

2.9

3.1

3.2

3.1

4.47

Rocky Ford Creek near Ephrata, Wash.

Location.- Lat. 47°18 I 20", long. 119°26'50", in NW^NWi sec. 21, T. 21 N., R. 27 E., 5£

miles upstream from mouth and 5 miles east of Ephrata. 

Gage-height record.- Water-stage recorder graph. 

Discharge record. -"Stage-discharge relation defined by current-meter measurements.

3age heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 71 second-feet (regulated) 5 p.m. June 28 (gage

height, 1.96 feet).

1909-11, 1942 to April 1948: Discharge, 120 second-feet (regulated) Aug. 29,

1942 (gage height, 2.70 feet). 

Remarks.- No diversion. Some regulation by temporary dams for irrigation and by fish

hatchery.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

41

42

43

43

43

44

44

45

45

46

June

54

55

55

56

56

57

57

57

58

59

July

70

70

71

72

72

74

75

75

75

75

Day

11

12

13

14

15

16

17

18

19

20

May

46

48

48

48

48

49

49

50

52

52

June

60

60

60

60

61

63

62

62

63

63

July

76

76

77

77

77

78

78

79

78

79

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

52

52

52

52

52

53

53

53

54

54

54

48.6

-

June

63

64

65

65

66

66

67

68

68

69

61.3

-

July

81

80

81

81

81

81

81

83

83

83

83

77.5

-
162 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Moses Lake at Moses Lake, Wash.

Location.- Lat. 47°06', long. 119°20', in NEf- sec. 32, T. 19 N., R. 28 E., at crossing 

of State Highway 18, l£ miles uplake from mouth and 3 miles southwest of Moses Lake. 

Datum of gage is at mean sea level (Bureau of Reclamation bench mark).

gage-height record.- Water-stage recorder graph.

Remarks.- Water surface controlled by dam at lake outlet. Many diversions for irrigation.

Mean elevation*, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

45.60

45.60

45.60

45.62

45=63

45.65

45.65

45.65

45.65

45.66

June

45.89

45.90

45.90

45.90

45.90

45.90

45.93

45.96

45.99

46.05

July

47.35

47.33

47.31

47,28

47.26

47.25

47.23

47.21

47.19

47.17

Day

11

12

13

14

15

16

17

18

19

20

May

45.67

45.67

45.67

45.67

45.68

45.68

45.67

45.69

45.73

45.79

June

46.13

46.18

46.23

46.29

46.39

46.54

46.68

46.81

46.91

47.00

July

47.14

47.11

47.08

47.04

47.01

46.98

46.97

46.97

46.97

46.95

Day

21

22

23

24

25

26

27

28

29

30

31

May

45.81

45.83

45.84

45.86

45.87

45.87

45.87

45.87

45.88

45.89

45.89

June

47.08

47.15

47.20

47.26

47.31

47.34

47.37

47.33

47.39

47.38

July

46.94

46.92

46.88

46.85

46.82

46.79

46.75

46.72

46.69

46.63

46.61

Add 1,000 feet to obtain elevation above mean sea level.

Park Lake near Coulee City, Wash.

Location.- Lat. 47°35', long. 119°24', in NW£ sec. 14, T. 24 N., R. 27 E., 1 mile uplake 

from mouth and 5^ miles southwest of Coulee City. Datum of gage is at mean sea level 

(Bureau of Reclamation bensh mark).

gage-height record.- Staff gage read occasionally.

Remarks.- Some diversion from tributaries for irrigation.

Elevation, in feet, 1948

May 5 

20

1,095.72 

1,095.82

June 11 

22

1,095.86 

I,095v81

July 8 

22

1,095.54 

1,095.46

Blue Lake near Coulee City, Wash.

Location.- Lat. 47°34', long. 119°26', in SE£ sec. 16, T. 24 N., R. 27 E., 2| miles uprake from mouth and 7 miles southwest of Coulee City. Datum of gage is at mean sea 

level (Bureau of Reclamation bench mark). *

Gage-height record.- Staff gage read occasionally.

Remark's.- Some diversion from tributaries for irrigation.

Elevation, in feet, 1948

May 5 

20

1,093.28 

1,093.36

June 11 

22

1,093.40 

1,093.34

July 8 

22

1,093.10 

1,092.93

Lenore Lake near Soap Lake, Wash.

Location.- Lat. 47°31', long. 119°30', in SW^ sec. 1, T. 23 N., R. 26 E., 5| miles uplake from mouth and 9 miles north of Soap Lake. Datum of gage is at mean sea level 

(Bureau of Reclamation bench *nark).

gage-height record.- Staff gage read occasionally.

Remarks.- Some diversion from tributaries for irrigation.

Elevation, in feet, 1948

May 5 

20

1,080.71 

1,081.00

June 11 

22

1,081.45 

1,081.67

July 8 

22

1,031.59 

1,081.50

Soap Lake near Soap Lake, Wash.

Location.- Lat. 47°25', long. 119°30', in SE£ sec. 12, T. 22 N., R. 26 E., l£ miles uplake From mouth and 2 miles north of Soap Lake. Datum of gage is at mean sea level 

(Bureau of Reclamation bench mark).

Gage-height record.- Staff gage read occasionally.

Remarks.- Some diversion from tributaries for irrigation.

Elevation, in feet, 1948

May 5 

20

1,072.94 

1,073.12

June 11 

22

1,073.30 

1,073.37

July 8 

22

1,073.21 

1,073.11
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Yakima River Basin

Keechelus Lake near Martin, Wash.

Location.- Lat. 47°19', long. 121°20', at dam on Yakima River in NE£ sec. 12, T. 21 N. ,

R. 11 E. , at outlet of Keechelus Lake, 3-j miles northwest of Martin and 9f miles

hwest of Easton. Datum of gage is at .mean sea level (Bureau of Reclamation bench

Drainage area.- . 55 square miles.. 

Gage-height record.- Twice-daily staff -gage readings.

furnished by Bureau of Reclamation, reviewed and prepared for publication by SeoMean elevation*, in feet, and contents, in acre-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change in contents, acrefeet

Change in contents, equivalent mean

second-feet

May

Feet

1.05

1.26

1.58

2.03

2.47

3.06

3.82

4.49

4.99

5.43

5.83

6.24

6.74

7.26

7.75

8.21

8.80

9.40

9.95

10.46

11.19

12.14

12.96

13.67

14.32

15.20

16.04

16.57

16.40

15.74

15.66

Acre-feet

119,420

119,890

120,610

121,620

122,620

123,960

125,700

127,240

128,400

129,420

130,350

131,310

132,490

133,720

134,880

135,970

137,390

138,840

140,170

141,410

143,200

145,540

147,570

149,340

150,980

153,200

155,320

156,670

156,240

154,560

154,360

+35,430

+576

June

Feet

15.70

15.77

15.90

15.82

15.71

15.78

15.97

16.09

16.11

16.15

16.08

15.94

15.70

15.55

15.39

15.35

15.42

15.31

15.25

15.24

15.40

15.43

15.31

15.22

15.15

15.30

15.54

15.66

15.78

15.80

Acre-feet

154,460

154,640

154,970

154,760

154,490

154,660

155,140

155,450.

155,503

155,600

155,420

155,070

154,460

154,080

153,630

153,580

153,750

153,470

153,320

153,300

153,700

153,780

153,470

153,250

153,070

153,450

154,060

154,360

154,660

154,710

+350

+5.9

July

Feet

15.74

15.67

15.60

15.55

15.53

15.55

15.58

15.54

15.48

15.41

15.29

15.18

14.99

14.74

14.49

14.29

14.05

13.81

13.55

13.29

13.00

12.71

12.42

12.10

11.81

11.47

11.17

10.90

10.57

10.26

9.93

Acre-feet

154,560

154,380

154,210

154,080

154,030

154,080

154,160

154;060

153,900

153,730

153,420

153,140

152,660

152,040

151,400

150,900

150,300

149,700

149,040

148,400

147,670

146,950

146,230

145,440

144,720

143,890

143,150

142,490

141,680

140,920

140,120

-14,590

-237

Add 2,500 feet to obtain elevation above mean sea level.
164 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Yakima River near Martin, Wash.

Location.- Lat. 47°19'10", long. 121°20'10", Just downstream from dam at outlet of Keechelus Lake, 3^ miles northwest of Martin, Kittitas County, and 12 miles upstream 

from Easton.

Drainage area.- 55 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record. -~Stage-dls charge relation defined by current-meter measurements. Gageheights used to hundredths May 1 to June 21; hundredths below and half -tenths above 4.5 

feet June 22 to July 30. Shifting-control method used May 1-24, July 9-31. Discharge 

7 a.m. May 26 to noon July 13 is combined flow past gage and over lake spillway.

Maxima.- May-June 1948: Discharge, 4,150 second-feet 6:30 a.m. May 29 (gage height, 8.59

.

1903 to April 1948: Discharge, 7,370 

dam was vashed out.

Remarks . - Plow regulated by Keechelus Lake. 

in contents of Keechelus Lake. Records 

Bureau of Reclamation.

second-feet Mar. 26, 1915, when temporary crib

Figures of discharge not adjusted for change 

collected and prepared in cooperation with

Mean discharge, in second-feet, 19^8

Day

1

2

3

4

5

6

7

8

9

10

May

4.9

4.9

5.9

6.5

6.2

7.2

6.5

6.5

6.2

6.2

June

1,370

1,490

1,670

1,530

1,400

1,490

1,770

1,950

1,990

2,020

July

642

552

467

411

389

411

445

400

393

431

Day

11

12

13

14

15

16

17

18

19

20

May

6.2

6.2

6.2

6.2

6.5

6.5

6.9

6.7

-98

248

June

1,970

1,720

1,410

1,200

1,040

1,010

1,060

992

938

925

July

433

467

500

554

554

554

554

554

554

554

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ... ... ..................... ...... ..............

Runoff, in inches .......................... . . ................... .........................................................................

May

220

146

147

432

813

965

1,920

3,170

3,230

1,680

468

9.81

June

1,050

1,080

974

910

642

293

413

540

695

722

1,210

24.52

July

554

554

554

554

554

554

554

554

554

554

513

10.76

Gage height, in feet, and discharge, in second-feet, at indicated time, 19Jt8

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.23 

2.23 

2.23 

2.23 

2.23 

2.23

6.9 

6.9 

6.9 

6.9 

6.9 

6.9

May 23

4.01 

4.01 

4.00 

4.00 

4.01 

4.01

M

8.58 

8.59 

8.59 

8.60 

8.60 

8.59

147 

147 

146 

146 

147 

147

iy29

4,110 

3,820 

3,170 

2,720 

2,400 

2,230

June 4

7.00 

7.00 

7.00 

7.00 

7.00 

7.00

1,560 

1,550 

1,530 

1,520 

1,490 

1,480

June 10

7.01 

7.00 

7.00 

7.00 

7.00 

7.00

2,020 

2,020 

2,030 

2,030 

2,030 

2,030

June 16

6.99 

6.99 

6.99

7.00 

7.00 

7.00

989 

997 

1,000 

1,020 

1,030 

1,050

Gage 

height Discharge

May 18

2.23 

2.23 

2.22 

2.22 

2.22 

2.22

6.9 

6.9 

6.5 

6.5 

6.5 

6.5

May 24

4.01 

4.01 

5.40 

6.25 

7.04 

7.04

147 

147 

393 

592 

818 

818

May 30

8.59 

8.58 

7.27 

6.99 

7.00 

7.00

2,100 

2,040 

1,540 

1,380 

1,350 

1,310

June 5

7.00 

7.00 

6.99 

6.98 

6.98 

7.00

1,460 

1,340 

1,410 

1,390 

1,380 

1,380

June 11

7.00 

7.00 

7.00 

7.01 

7.01 

7.01

2,020 

1,980 

1,970 

1,950 

1,920 

1,880

June 17

7.00 

7.00 

7.00 

7.00 

7.00 

7.00

1,060 

1,080 

1,080 

1,060 

1,040 

1,030

Gage 

height Discharge

May 19

2.22 

2.22 

4.00 

4.07 

4.01 

4.01

6.5 

6.5 

146 

155 

147 

147

May 25

7.05 

7.02 

7.01 

'7.01 

7.02 

7.03

822 

812 

809 

809 

812 

815

May 31

7.00 

7.00 

7.00 

6.98 

7.00 

7.01

Jl

7.00 

7.00 

6.99 

6.99 

7.00 

7.01

1,310 

1,310 

1,320 

1,320 

1,320 

1,340

ne6

1,420 

1,450 

1,490 

1,530 

1,560 

1,610

June 12

7.01 

7.01 

7.00 

7.00 

7.01 

7.01

1,830 

1,790 

1,710 

1,660 

1,610 

1,550

June 18

7.00 

7.00 

7.00 

6.99 

6.99 

6.99

1,020 

1,000 

992 

980 

963 

963

Gage 

height Discharge

May 20

4.01 

4.02 

5.00 

5.01 

5.01 

5.01

147 

148 

309 

311 

311 

311

May 26

7.04 

7.04 

7.04 

7.04 

7.05 

7.06

818 

835 

908 

1,010 

1,150 

1,320

June 1

7.01 

7.01 

7.00 

6.99 

7.00 

7.01

1,350 

1,360 

1,360 

1,380 

1,380 

1,390

June 7

7.01 

7.01 

7.01 

7.00 

7.01 

7.02

1,660 

1,720 

1,770 

1,820 

1,880 

1,920

June 13

7.01 

7.01 

7.00 

7.00 

7.00 

7.00

1,490 

1,450 

1,410 

1,370 

1,340 

1,300

June 19

6.99 

6.99 

6.99 

6.99 

6.99 

6.99

956 

942 

928 

928 

928 

928

Gage 

height Discharge

May 21

5.01 

5.01 

3.92 

3.99 

4.00 

4.01

311 

311 

135 

144 

146 

147

May 27

7.07 

7.07 

7.07 

7.07 

7.08 

7.08

1,490 

1,680 

1,990 

2,110 

2,320 

2,550

June 2

7.01 

7.01 

7.00 

7.00 

7.01 

7.02

Ju

7.02 

7.02 

7.01 

7.00 

7.01 

7.02

1,430 

1,450 

1,480 

1,520 

1,560 

1,600

ne8

1,920 

1,930 

1,950 

1,970 

1,980 

1,980

June 14

7.00 

7.00 

7.00 

7.00 

7.00 

7.00

1,260 

1,230 

1,210 

1,170 

1,140 

1,110

June 20

6.99 

6.99 

6.99 

6.99 

6.99 

6.99

928 

921 

921 

921 

928 

935

Gage 

height Discharge

May 22

4.02 

4.02 

3.99 

3.98 

4.00 

4.00

148 

148 

144 

143 

146 

146

May 28

7.09 

7.10 

7.11 

8.32 

8.57 

8.58

2,760 

2,920 

2,980 

3,490 

3,720 

3,920

June 3

7.02 

7.02 

7.02 

7.00 

7.00 

7.00

Jl

7.02 

7.02 

7.00 

7.00 

7.01 

7.01

1,700 

1,740 

1,710 

1,630 

1,620 

1,590

ne9

1,980 

1,980 

1,980 

2,000 

2,000 

2,000

June 15

7.00 

7.00 

7.00 

6.99 

6.99 

6.99

1,090 

1,050 

1,030 

1,010 

989 

989

June 21

6.99 

7.00 

7.01 

7.01 

7.01 

7.01

963 

1,000 

1,050 

1,090 

1,130 

1,150
YAKIMA RIVER BASIN

Yakima River at Cle Elum, Wash.

Location.- Lat. 47°11'20", long. 120°56'40", in sec. 27, T. 20 N., R. 15 E., at highway 

bridge at Cle Elum, Just upstream from Roslyn Creek and 7 miles upstream from Teanaway River.

Drainage area.- 500 square miles.

Gage-height Tecord.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

13,200 3ec6hd~-feet and extended to peak stage. Gage heights used to hundredths 

May 17 to June 21; half-tenths 5.5 to 8.3 feet, hundredths below and tenths above 

these limits May 1-16, June 22 to July 31. Shifting-control method used May 31 to 

July 31.

Maxima.- May-June 1948: Discharge, 16,700 second-feet 7 to 11 a.m. May 29 (gage height, 

12731 feet).

1906 to April 1948: Discharge, 25,600 second-feet Nov. 14, 1906 (gage height, 

12.5 feet, from floodmarks).

Remarks.- Kittitas Canal diverts water above station for irrigation. Plow partly regulated by Keechelus, Kachess, and Cle Elum Lakes. Figures of discharge not adjusted 

for diversion or change in contents of lakes (average discharge, May 147 second-feet; 

June 485 second-feet; July 1,058 second-feet). Records collected in cooperation with 

Bureau of Reclamation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

811

740

718

835

876

1,120

1,470

1,520

1,620

1,620

June

9,840

9,780

10,400

10,500

10,500

11,000

11,200

11,300

11,400

10,900

July

2,720

2,490

3,430

4,000

3,970

3,190

2,640

2,580

2,540

2,600

Day

11

12

18

14

15

16

17

18

19

20

May

1,680

1,850

2,030

2,150

2,220

2,280

2,510

2,660

2,840

3,640

June

10,400

10,200

8,640

6,930

5,600

4,920

5,790

5,810

5,570

5,140

July

2,660

2,670

2,670

2,730

2,760

2,780

2,750

2,730

2,720

2,660

Duy

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...... ... . . .....

Runoff, in inches ........................................... ....... ...... . ..............................................................

May

3,860

2,600

2,320

2,660

6,050

8,790

10,600

14,300

16,300

13,700

11,200

4 115

9.49

June

5,070

5,100

4,870

4,540

3,850

2,970

2,670

2,680

2,760

2,810

15.85

July

2,670

2,700

2,860

2,940

2,970

2,940

3,000

3,070

3,050

3,020

3,050

2

QQQ

6.66

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

g 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.63 

6.65 

6.67 

6.68 

6.73 

6.75

2,450 

2,480 

2,510 

2,520 

2,600 

2,620

May 23

6.61 

6.54 

3.53 

6.49 

6.46 

6.46

2,420 

2,330 

2,320 

2,270 

2,230 

2,230

May 29

12.29 

12.31 

12.30 

12.20 

11.90 

11.60

16,700 

16,700 

16,700 

16,400 

15,500 

14,600

June 4

10.89 

10.91 

10.88 

10.85 

10.88 

10.89

10,500 

10,500 

10,500 

10,400 

10,500 

10,500

June 10

11.22 

11.23 

11.20 

11.11 

10.94 

10.92

11,200 

11,200 

11,100 

10,800 

10,300 

10,300

June 16

8.74 

8.73 

8.75 

9.03 

9.14 

9.17

4,580 

4,560 

4,600 

5,290 

5,420 

5,480

Gage 

height Discharge

May 18

6.77 

6.79 

6.79 

6.74 

6.77 

6.78

2,660 

2,680 

2,680 

2,610 

2,660 

2,670

May 24

6.46 

6.45 

6.44 

6.72 

7.34 

7.56

2,230 

2,220 

2,200 

2,580 

3,610 

4,020

May 30

11.49 

11.46 

11.35 

11.19 

11.09 

10.95

14,300 

14,200 

13,800 

13,400 

13,100 

12,600

June 5

10.85 

10.83 

10.88 

10.96 

11.01 

11.01

10,300 

10,300 

10,400 

10,700 

10,800 

10,800

June 11

10.94 

10.98 

10.99 

11.00 

11.02 

11.01

10,300 

10,400 10,400' 

10,500 

10,500 

10,500

June 17

9.20 

9.18 

9.40 

9.43 

9.44 

9.42

5,510 

5,460 

5,950 

6,020 

6,050 

6,000

Gage 

height Discharge

May 19

6.80 

6.82 

6.83 

6.91 

7.02 

7.10

2,700 

2,730 

2,750 

2,880 

3,050 

3,190

M?y25

7.78 

7.92 

8.10 

9.07 

9.41 

9.52

4,460 

4,740 

5,120 

7,380 

8,260 

8,550

May 31

10.80 

10.79 

10.81 

10.59 

10.62 

10.64

11,300 

11,200 

11,300 

10,700 

10,800 

10,800

June 6

10.98 

10.97 

11.18 

11.18 

11.16 

11.15

10,700 

10,700 

11,300 

11,300 

11,200 

11,200

June 12

10.99 

10.96 

10.90 

10.88 

10.83 

10.80

10,400 

10,300 

10,100 

10,100 

9,910 

9,820

June 18 n

9.40 

9.36 

9.36 

9.32 

9.31 

9.31

5,910 

5,860 

5,820 

5,730 

5,700 

5,700

Gage 

height Discharge

May 20

7.19 

7.28 

7.34 

7.42 

7.53 

7.63

3,340 

3,500 

3,610 

3,760 

3,970 

4,160

May 26

9.60 

9.60 

9.60 

9.59 

9.61 

9.75

8,770 

8,770 

8,770 

8,740 

8,800 

9,180

June 1

10.65 

10.65 

10.54 

10.63 10.58' 

10.58

9,880 

9,880 

9,570 

9,820 

9,680 

9,680

June 7

11.18 

11.20 

11.20 

11.19 

11.16 

11.20

11,200 

11,300 

11,300 

11,200 

11,200 

11,300

June 13

10.67 

10.61 

10.40 

10.24 

10.02 

9.95

9,400 

9,240 

8,660 

8,230 

7,660 

7,480

June 19

9.30 

9.28 

9.27 

9.26 

9.24 

9.21

5,640 

5,590 

5,570 

5,550 

5,510 

5,440

Gage 

height Discharge

May 21

7.71 

7.76 

7.79 

7.33 

6.84 

6.73

4,320 

4,420 

4,480 

3,590 

2,760 

2,600

May 27

9.86 

10.02 

10.22 

10.40 

10.64 

10.90

9,490 

9,940 

10,500 

11,000 

11,700 

12,500

June 2

10.58 

10.63 

10.65 

10.61 

10.63 

10.68

9,660 

9,800 

9,850 

9,740 

9,800 

9,940

June 8

11.20 

11.21 

11.24 

11.24 

11.23 

11.24

11,200 

11,200 

11,300 

11,300 

11,300 

11,300

June 14

9.94 

9.92 

9.72 

9.61 

9.55 

9.51

7,400 

7,350 

6,850 

6,590 

6,450 

6,350

June 20

9.21 

9.21 

9.02 

8.98 

8.99 

9.00

5,400 

5,400 

4,990 

4,910 

4,930 

*,950

Gage 

height

Mi

6.76 

6.76 

6.75 

6.72 

6.70 

6.65

Discharge

iy22

2,640 

2,640 

2,620 

2,580 

2,550 

2,480

May 28

11.00 

11.17 

11.40 

11.79 

12.00 

12.21

12,800 

13,300 

14,000 

15,200 

15,800 

16 , 400

June 3

10.70 

10.73 

10.87 

10.90 

10.95 

10.98

9,970 

10,100 

10,500 

10,500 

10,700 

10,800

June 9

11.24 

11.24 

11.26 

11.31 

11.28 

11.24

11,300 

11,300 

11,300 

11,500 

11,400 

11,300

June 15

9.47 

9.45 

9.17 

9.11 

8.81 

8.78

6,210 

6,160 

5,530 

5,400 

4,760 

4,700

June 21

9.04 

9.06 

9.03 

9.11 

9.11 

9.11

4,990 

5,040 

5,080 

5,140 

5,140 

5,140

Supplemental record.- May 21, 2 p.m., 7.80 ft., 4,500 sec 

ft., 7,970 sec.-ft.; May 29, 2 p.m., 12.29 ft., 16,700 sec. 

ft., 11,900 sec.-ft.

,-ft.; May 25, 6 p.m., 9.30 

-ft.; May 31, 10 a.m., 11.02
166 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Yaklma River at Umtanum, Wash.

Location.- Lat. 46°51'45", long. 120°28'30", In NW£ sec. 20, T. 16 N., R. 19 E., at 

Umtanum, half a mile upstream from Umtanum Creek and 10 miles south of Ellensburg. 

Datum of gage Is 1,300.0 feet above mean sea level, datum of 1929.

Drainage area.- 1,620 square miles.

Gage-height record.- Water-stage recorder graph.

Pischarge record. -"Stage-discharge relation defined by current-meter measurements 

below 22,800 second-feet and extended to peak stage. Gage heights used to 

hundredths May 17 to June 21j half-tenths between 31.6 feet and 34.2 feet, hundredths below and tenths above these limits May 1-16, June 22 to July 31.

Maxima.- May-June 1948: Discharge, 27,700 second-feet 6 p.m. May 29 (gage height, 

38.98 feet).

1906 to April 1948: Discharge, 41,000 second-feet Nov. 15 or 16, 1906 (gage 

height, 41.1 feet, from floodmarks, present datum).

Remarks.- Flow partly regulated by Keechelus, Kachess, and Cle Elum Lakes. Water 

diverted above station for Irrigation of about 91,000 acres. Figures of discharge 

not adjusted for diversion or change In contents of lakes. Records collected and 

prepared In cooperation with Bureau of Reclamation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,040

1,940

1,940

2,540

2,630

3,100

4,580

4,360

4,020

4,020

June

14,100

13,000

12,600

12,700

12,200

12,400

12,800

12,800

12,700

12,500

July

3,390

3,190

3,290

4,240

4,240

4,240

3,290

3,290

3,190

3,100

Day

11

12

13

14

15

16

17

18

19

20

May

3,910

3,910

4,240

4,360

4,130

4,360

4,600

4,730

4,790

6,650

June

12,500

12,500

11,400

9,420

8,060

7,370

8,750

8,440

7,840

7,490

July

3,190

3,190

3,100

3,100

3,100

3,100

3,000

3,100

3,190

3,100

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .. ............ . .. .................................. . ..................

Runoff, in inches ............................ . ........ ....................................................

May

8,400

7,460

6,890

6,490

7,960

11,600

13,800

18,500

26,200

22,700

17,000

7,221

5.14

June

7,010

6,820

6,520

6,100

5,440

4,580

4,020

3,800

3,700

3,590

9,105

6.27

July

3,000

3,000

3,000

3,190

3,190

3,190

3,190

3,190

3,190

3,190

3,190

3,263

2.32

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

32.91 

32.93 

32.99 

33.00 

32.98 

32.97

4,490 

4,540 

4,680 

4,700 

4,650 

4,630

May 23

33.88 

33.91 

33.88 

33.80 

33.72 

33.65

7,060 

7,150 

7,060 

6,820 

6,580 

6,380

May 29

-58.35 

38.58 

38.81 

38.89 

38.96 

38.84

Ju

35.53 

35.52 

35.53 

35.50 

35.46 

35.40

24,8oO 

25,900 

26,900 

27,300 

27,600 

27,100

ne 4

12 , 800 

12,800 

12,800 

12,700 

12,500 

12,300

June 10

35.49 

35.49 

35.45 

35.42 

35.37 

35.40

12,700 

12,700 

12,500 

12,400 

12,200 

12,300

June 16

33.88 

33.83 

33.88 

33.98 

34.13 

34.36

7,060 

6,910 

7,060 

7,360 

7,840 

8,570

Gage 

height Discharge

May 18

33.00 

33.02 

33.03 

33.03 

33.02 

33.00

4,700 

4,750 

4,770 

4,770 

4,750 

4,700

May 24

33.63 

33.67 

33.74 

33.73 

33.68 

33.72

M

38.66 

38.29 

37.68 

37.38 

37.24 

37.08

6,320 

6,440 

6,640 

6,610 

6,460 

6,580

»y 30

£8,2uO 

24,500 

21,800 

20,500 

19,900 

19,200

June 5

35.39 

35.41 

35.39 

35.38 

35.32 

35.33

12,300 

12,300 

12,300 

12,200 

12,000 

12,000

June 11

35.38 

35.36 

35.41 

35.51 

35.60 

35.60

12,200 

12,100 

12,300 

12,700 

13,100 

13,100

June 17

34.44 

34.45 

34.43 

34.38 

34.40 

34.40

8,840 

8,870 

8,800 

8,640 

8,700 

8,700

Gage 

height Discharge

May 19

32.99 

33.02 

33.04 

33.05 

33.05 

33.14

4,680 

4,750 

4,800 

4,820 

4,820 

5,040

May 25

33.87 

34.10 

34.26 

34.32 

34.34 

34.47

7,030 

7,740 

8,250 

8,440 

8,510 

8,940

May 31

33.83 

36.72 

36.55 

36.35 

36.25 

36.08

18,300 

17,700 

17,000 

16,100 

15,700 

15,000

June 6

35.39 

35.44 

35.47 

35.43 

35.41 

35.50

12,300 

12,500 

12,600 

12,400 

12,300 

12,700

June 12

35.60 

35.55 

35.48 

35.38 

35.31 

35.27

13,100 

12,900 

12,600 

12,200 

12,000 

11,800

June 18

34.39 

34.38 

34.34 

34.29 

34.22 

34.20

8,670 

8,640 

8,500 

8,350 

8,120 

8,060

Gage 

height Discharge

May 20

33.34 

33.56 

33.80 

34.00 

34.06 

34.11

5,540 

6,130 

6,820 

7,420 

7,610 

7,770

May 26

34.81 

35.14 

35.38 

35.51 

35.51 

35.53

Ju

35.96 

35.91 

35.86 

35.80 

35.70 

35.66

Ju

35.50 

35.54 

35.58 

35.54 

35.51 

35.49

10,100 

11,300 

12,200 

12,700 

12 , 700 

12,800

ne 1

14,500 

14,300 

14,100 

13,900 

13,500 

13,300

ne7

12,700 

12,900 

13,000 

12,900 

12,700 

12,700

June 13

35.22 

35.26 

35.19 

35.12 

35.03 

34.92

11,600 

11,800 

11,500 

ll,2dO 

10,900 

10,500

June 19

34.17 

34.16 

34.15 

34.10 

34.08 

34.05

7,960 

7,930 

7,900 

7,740 

7,680 

7,580

Gage 

height Discharge

May 21

34.23 

34.32 

34.38 

34.39 

34.33 

34.27

8,160 

8,440 

8,640 

8,670 

8,480 

8,280

May 27

35.61 

35.68 

35.78 

35.90 

35.99 

36.03

13,100 

13,400 

13,800 

14,300 

14,700 

14,800

June 2

35.63 

35.61 

35.58 

35.54 

35.50 

35.48

Ju

35.49 

35.53 

35.57 

35.58 

35.55 

35.49

13., 200 

13,100 

13,000 

12,900 

12,700 

12,600

ne8

12,700 

12,800 

13,000 

13,000 

12,900 

12,700

June 14

34.76 

34.66 

34.61 

34.55 

34.44 

34.36

9,940 

9,580 

9,410 

9,210

8,840 

8,570

June 20

34.05 

34.05 

34.05 

34.05 

33.95 

33.90

7,580 

7,580 

7,580 

7,580 

7,270 

7,120

Gage 

height Discharge

May 22

34.07 

34.02 

34.01 

33.98 

33.92 

33.86

7,640 

7,480 

7,450 

7,360 

7,180 

7,000

May 28

36.34 

36.56 

36.90 

37.16 

37.58 

37.81

16,100 

17,000 

18,400 

19,500 

21,400 

22,400

June 3

35.48 

35.51 

35.51 

35.48 

35.46 

35.50

12,600 

12,700 

12,700 

12,600 

12,500 

12,700

June 9

35.50 

35.53 

35.54 

35.51 

35.50 

35.48

Ju

34.30 

34.27 

34.22 

34.18 

34.06 

54.00

12 , 700 

12,800 

12,900 

12,700 

12,700 

12,600

ne!5

8,380 

8,280 

8,120 

8,000 

7,610 

7,420

June 21

33.88 

33.88 

33.88 

33.85 

33.83 

33.82

7,060 

7,060 

7,060 

6,970 

6,910 

6,880

Supplemental record.- May 29, 6 p.m., 38.98 ft., 27,700 sec.-ft.
YAKIMA RIVER BASIN 167

Yakima River near Parker, Wash.

Location.- Lat. 46°29'40", long. 120"26'10", in sec. 28, T. 12 N., R. 19 E., just downstream from Sunnyside diversion dam, lj miles east of Parker, and 3 miles downstream 

from Ahtanum Creek.

Drainage area.- 3,560 square miles.

Gage-height "record.- Water-stage recorder graph.

Discharge record. -~Stage-discharge relation defined by current-meter measurements. Gage 

heights used to hundredths May 17 to June 21; half "tenths between 3.3 feet and 5.8 

feet, hundredths below and tenths above these limits May 1-16, June 22 to July 31. 

Shifting-control method used July 7-31.

Maxima.- May-June 1948: Discharge, 37,700 second-feet 10 p.m. May 29 (gage height,

 T5752 feet).

1908-21, 1931 to April 1948: Discharge, 54,300 second-feet Dec. 23, 1933 (gage 

height, 15.0 feet, from floodmarks).

Remarks.- Flow partly regulated by diversions and by Keechelus, Kachess, Cle Elum, and 

Bumping Lakes. New Reservation, Old Reservation, Roza (Yakima Ridge), Sunnyside, 

and Union Gap Canals divert above station for irrigation (average total discharge, 

May, 3,647 second-feet: June, 3,504 second-feet: July, 3,919 second-feet). Figures 

of discharge not adjusted for diversions or change in contents of reservoirs. 

Records collected and prepared in cooperation with Bureau of Reclamation and Office 

of Indian Affairs.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

320

345

499

998

1,380

1,830

3,570

3,680

3,160

2,960

June

17,800

16,500

17,200

18,600

17,700

17,400

18,500

19,000

19,000

18,300

July

2,960

2,450

2,000

2,700

3,020

3,090

2,100

1,470

772

325

Day

11

12

13

14

15

16

17

18

19

20

May

2,760

2,760

3,160

3,300

-3,090

3,680

3,630

4,160

4,350

6,260

June

19,000

19,700

16,500

13,600

11,000

10,100

11,700

11,600

10,600

10,000

July

236

224

142

187

350

356

320

436

646

448

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ............

Runoff, in inches ............................................................................................................................

May

10,100

11,000

10,400

9,770

12,300

17,100

22,600

27,600

35,400

33,100

23,200

8,660

2.80

June

9,650

9,070

8,070

7,150

6,510

5,510

4,590

4,000

3,160

3,300

12,490

3.92

July

207

165

96

207

277

264

142

277

340

136

73

852

0.28

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

h

g 

K

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.31 

5.35 

5.42 

5.46 

5.56 

5.56

3,460 

3,520 

3,630 

3,700 

3,860 

3,860

May 23

8.65 

8.60 

8.62 

8.62 

8.54 

8.41

M

13.31 

13.34 

13.60 

13.74 

13.78 

13.77

Ju

10.65 

10.73 

10.75 

10.75 

10.71 

10.64

10,600 

10,400 

10,500 

10,500 

10,300 

9,910

iy29

33,600 

33,800 

35,900 

37,000 

37,300 

37,300

ne 4

18,400 

18,800 

18,800 

18,800 

18,600 

18,300

June 10

10.70 

10.68 

10.63 

10.63 

10.58 

10.59

Ju

8.50 

8.45 

8.41 

8.45 

8.54 

8.65

18,600 

18,500 

18,200 

18,200 

18,000 

18,000

ne!6

10,200 

10,000 

9,910 

10,000 

10,300 

10,650

Gage 

height Discharge

May 18

5.68 

5.72 

5.79 

5.82 

5.81 

5.78

4,050 

4,110 

4,230 

4,280 

4,270 

4,220

May 24

8.33 

8.30 

8.33 

8.37 

8.38 

8.51

9,680 

9,600 

9,680 

9,800 

9,820 

10,200

May 30

13.66 

13.50 

13.31 

13.08 

12.67 

12.34

Ju

10.57 

10.52 

10.50 

10.50 

10.45 

10.40

Ju

10.72 

10.72 

10.75 

10.79 

10.92 

11.00

36,400 

35,100 

33,600 

32,000 

29,100 

27,100

ne 5

18,000 

17,700 

17,600 

17,600 

17,400 

17,200

nell

18,700 

18,700 

18,800 

19,000 

19,700 

20,100

June 17

8.83 

9,03 

9=10 

9=12 

9.08 

8.99

11,200 

11,800 

12,000 

12,100 

12,000 

11,700

Gage 

height Discharge

May 19

5.78 

5.77 

5.86 

5.90 

5.94 

6.03

4,220 

4,200 

4,350 

4,420 

4,490 

4,640

May 25

8.60 

8.89 

9.14 

9.44 

9.63 

9.73

10,400 

11,300 

12,200 

13,400 

14,100 

14,500

May 31

12.07 

11.85 

11.60 

11.35 

11.10 

10.96

Ju

10.38 

10.40 

10.48 

10.52 

10.53 

10.50

25,500 

24,400 

23,100 

21,800 

20,600 

19,900

ne6

17,100 

17,200 

17,500 

17,700 

17,800 

17,600

June 12

11.07 

11.07 

11.01 

10.89 

10.74 

10.57

20,400 

20,400 

20,200 

19,600 

18,800 

18,000

June 18

8.95 

8.95 

9.02 

9.00 

8.95 

8.85

11,500 

11,500 

11,800 

11,700 

11,500 

11,200

Gage 

height Discharge

May 20

6.16 

6.34 

6.77 

7.22 

7.61 

7.91

4,880 

5,210 

6,040 

6,970 

7,850 

8,580

May 26

9.83 

9.96 

10.27 

10.60 

10.87 

11.27

14,900 

15,400 

16,700 

18,100 

19,400 

21,400

June 1

10.72 

10.58 

10.47 

10.41 

10.37 

10.28

Ju

10.55 

10.64 

10.72 

10.77 

10.79 

10.77

18,700 

18,000 

17,500 

17,200 

17,100 

16,700

ne7

17,800 

18,300 

18,700 

19,000 

19,000 

19,000

June 13

10.45 

10.34 

10.21 

10.10 

10.03 

9. '95

17,400 

17,000 

16,400 

16,000 

15,700 

15,400

June 19

8.76 

8.69 

8.65 

8.61 

8.58 

8.51

10,900 

10,700 

10,600 

10,500 

10,400 

10,200

Gage 

height

Mi

8.11 

8.33 

8.53 

8.75 

8.81 

8.84

Discharge

iy2l

9,100 

9,680 

10,200 

10,900 

11,100 

11,200

May 27

11.40 

11.32 

11.39 

11.57 

11.75 

11.86

Ju

10.23 

10.20 

10.26 

10.22 

10.21 

10.20

22,100 

21,700 

22,000 

23,000 

23,800 

24,400

ne2

16,500 

16,400 

16,600 

16,500 

16,400 

16,400

June 8

10.74 

10.73 

10.76 

10.80 

10.82 

10.82

18,800 

18,800 

18,900 

19,100 

19,200 

19,200

June 14

9.83 

9.66 

9.48 

9 = 32 

9.25 

9.12

14,900 

14,200 

13,500 

12,900 

12,600 

12,100

June 20

8.47 

8.41 

8.42 

8.45 

8.43 

8.43

10,100 

9,910 

9,940 

10,000 

9,960 

9,960

Gage 

height Discharge

May 22

8.85 

8.88 

8.81 

8.74 

8.72 

8.68

11,200 

11,300 

11,100 

10,900 

10,800 

10,700

May 28

12.00 

12.12 

12.36 

12.57 

12.90 

13.15

Ju

10.25 

10.33 

10.38 

10.50 

10.56 

10.64

Ju

10.80 

10.80 

10.78 

10.77 

10.72 

10.76

25,100 

25,800 

27,300 

28,500 

30,700 

32,400

ne3

16,600 

16,900 

17,100 

17,600 

17,900 

18,300

ne9

19,100 

19,100 

19,000 

19,000 

18,700 

18,900

June 15

8.94 

8.83 

8.79 

8.67 

8.59 

8.51

11,500 

11,200 

11,000 

10,700 

10,400 

10,200

June 21

8.38 

8.32 

8.30 

8.31 

8.27 

8.22

9,820 

9,660 

9,600 

9,630 

9,520 

9,380

Supplemental record.- May 29, 10 p.m., 13.82 ft., 37,700 sec.-ft.
168 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Yakiraa River at Kiona, Wash.

Location.- Lat. 46°15'10". long. 119°28'50", In sec. 19, T. 9 N., R. 27 E., at highway bridge at Kiona, 3^ miles downstream from intake of Kiona Canal and 25 miles

upstream from mouth, 

Drainage area.- 5,520 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Gage heights used to hundredths May 17 to June 21; half-tenths below and tenths

above 5.6 feet May 1-16, June 22 to July 31. 

Maxima..- May-June 1948: Discharge, 37,900 second-feet 8 a.m. May 31 (gage height,

17.20 feet).

1896-1915, 1933 to April 1948: Discharge, 71,100 second-feet Dec. 23, 1933

(gage height, 21.57 feet).

The flood of Dec. 23, 1933 is the greatest known since 1896. 

Remarks.- Water diverted above station for irrigation of approximately 425,000 acres.

Plow partly regulated by diversions and by Keechelus, Kachess, Cle Elum, and Bumping

Lakes, and Tieton Reservoir. Records collected and prepared in cooperation with

Bureau of Reclamation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,220

1,920

1,860

1,920

2,290

2,970

3,420

4,860

5,200

5,030

June

29,900

23,900

21,000

19,900

20,300

20,300

19,700

19,900

20,400

20,800

July

4,860

4,360

3,800

3,420

4,040

4,520

4,690

3,800

3,200

2,830

Day

11

12

13

14

15

16

17

18

19

20

May

4,860

4,860

4,860

5,370

5,550

5,550

5,840

6,030

6,510

6,920

June

20,900

21,000

21,900

20,000

18,500

16,300

15,100

15,400

15,800

15,100

July

2,480

2,220

2,100

1,980

1,860

1,920

1,920

1,860

1,920

2,160

Day

21

22

23

24

26

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .......... ....... . ... .. . .. ........................

Runoff, in inches ............................................................................................................................

May

8,500

11,200

12,400

12,800

12,500

12,800

14,600

18,700

23,000

32,300

36,800

1.91

June

14,600

13,400

12,700

11,600

10,200

9,200

7,990

6,830

5,910

5,030

3.33

July

2,100

1,920

1,760

1,760

1,860

1,980

1,980

1,920

1,920

1,980

1,860

0.55

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.82 

6.71 

6.59 

6.57 

6.58 

6.63

6,130 

5,930 

5,710 

5,680 

5,690 

5,780

r May 23

9.75 

9.81 

9.87 

9.92 

9.97 

10.01

Ms

13.28 

13.44 

13.62 

13.98 

14.38 

14.83

Ju

12.86 

12.82 

12.80 

12.80 

12.82 

12.85

12,100 

12,300 

12,400 

12,500 

12,600 

12,700

»y29

21,300 

21,800 

22,400 

23,700 

25-, 200 

26,900

ne 4

20,000 

19,900 

19,800 

19,800 

19,900 

20,000

June 10

13.09 

13.13 

13.17 

13.17 

13.16 

13.16

20,700 

20,800 

20,900 

20,900 

20,900 

20,900

June 16

11.73 

11.58 

11.44 

11.41 

11.23 

11.15

16,900 

16,500 

16,200 

16,100 

15,600 

15,400

Gage 

height Discharge

May 18

6.68 

6.71 

6.76 

6.82 

6.86 

6.93

5,870 

5,930 

6,020 

6,130 

6,200 

6,320

May 24

10.03 

10.04 

10.05 

10.06 

10.06 

10.03

12,800 

12,800 

12,800 

12,800 

12,800 

12,800

May 30

15.30 

15.74 

16.13 

16.44 

16.74 

17.01

Ju

12.89 

12.93 

12.97 

13.01 

13.04 

13.06

28,800 

30,800 

32,600 

34,000 

35,500 

36,900

ne 5

20,100 

20,200 

20,300 

20,400 

20,500 

20,600

June 11

13.16 

13.16 

13.15 

13.16 

13.15 

13.16

20,900 

20,900 

20,900 

20,900 

20,900 

20,900

June 17

11.09 

11.04 

11.00 

10.98 

10.97 

10.97

15,300 

15,200 

15,100 

15,000 

15,000 

15,000

Gage 

height Discharge

May 19

6.96 

7.00 

7. '03 

7.09 

7.09 

7.11

6,380 

6,450 

6,510 

6,620 

6,620 

6,660

May 25

9.95 

9.89 

9.86 

9.85 

9.85 

^9.86

12,600 

12,500 

12,400 

12,400 

12,400 

12,400

May 31

17.14 

17.20 

17.10 

16.98 

16.72 

16.42

37,600 

37,900 

37,400 

36,800 

35,400 

33,900

June 6

13.06 

13.01 

12.96 

12.92 

12.89 

12.85

20,600 

20,400 

20,300 

20,200 

20,100 

20,000

June 12

13.15 

13.16 

13.16 

13.17 

13.21 

13.30

20,900 

20,900 

20,900 

20,900 

21,100 

21,400

June 18

11.00 

11.08 

11.13 

11.19 

11.26 

11.29

15,100 

15,200 

15,400 

15,500 

15,700 

15,800

Gage 

height

Ms

7.14 

7.18 

7.24 

7.30 

7.34 

7.44

Discharge

y20

6,720 

6,790 

6,910 

7,020 

7,100 

7,290

May 26

9.90 

9.94 

10.02 

10.11 

10.21 

JL0.33

12,500 

12,600 

12,800 

13,000 

13,200 

13,500

June 1

16.12 

15.80 

15.50 

15.22 

14.94 

14.69

32,500 

31,000 

29,700 

28,500 

27,400 

26,400

June 7

12.82 

12.77 

12.76 

12.74 

12.75 

12.76

19,900 

19,700 

19,700 

19,600 

19,600 

19,700

June 13

13.40 

13.44 

13.50 

13.52 

13.56 

13.49

21,700 

21,800 

22,000 

22,100 

22,200 

22,000

June 19

11.30 

11.31 

11.31 

11.30 

11.28 

11.24

15,800 

15,800 

15,800 

15,800 

15,800 

15,700

Gage 

height Discharge

May 21

7.56 

7.75 

8.01 

8.30 

8.57 

8.77

7,510 

7,890 

8,410 

8,990 

9,560 

9,980

May 27

10.45 

10.57 

10.68 

10.80 

11.44 

11.65

13,800 

14,000 

14,300 

14,600 

16,200 

16,700

June 2

14.45 

14.22 

14.00 

13.80 

13.66 

13.50

25,400 

24,600 

23,800 

23,000 

22,600 

22,000

June 8

12.77 

12.80 

12.82 

12.85 

12.90 

12.92

19,700 

19,800 

19,900 

20,000 

20,100 

20,200

June 14

13.38 

13.24 

13.11 

12.97 

12.84 

12.73

21,600 

21,200 

20,800 

20,300 

19,900 

19,600

June 20

11.14 

11.06 

10.99 

10.90 

10.84 

10.78

15,400 

15,200 

15,100 

14,800 

14,700 

14,600

Gage 

height Discharge

May 22

8.97 

9.23 

9.39 

9.49 

9.60 

9.68

10,400 

11,000 

11,300 

11,500 

11,800 

12,000

May 28

11.94 

12.20 

12.44 

12.62 

12.84 

13.08

17,400 

18,100 

18,100 

19,300 

19,900 

20,700

June 3

13.36 

13.26 

13.14 

13.07 

13.00 

12.92

21,600 

21,200 

20,800 

20,600 

20,400 

20,200

June 9

12.96 

12.99 

12.98 

12.98 

13.00 

13.06

20,300 

20,400 

20,300 

20,300 

20,400 

20,600

June 15

12.60 

12.48 

12.34 

12.22 

12.08 

12.00

19,200 

18,900 

18,500 

18,200 

17,800 

17,600

June 21

10.74 

10.68 

10.65 

10.63 

10.60 

10.54

14,500 

14,300 

14,200 

14,200 

14,100 

14,000

Supplemental record.- May 17, 2 a.m., 6.81 ft., 6,110 sec.-ft.; May 22, 5:30 a......

9.00 ft., 10,500 sec.-ft., 6 a.m., 9.12 ft., 10,700 sec.-ft., 6 p.m., 9.57 ft., 11,700 

sec.-ft.; May 27, 7 p.m., 10.93 ft., 14,900 sec.-ft.; May 31, 2 a.m., 1-7.10 ft., 37,400 

sec.-ft., 6 a.m., 17.18 ft., 37,800 sec.-ft., 10 a.m., 17.18 ft., 37,800 sec.-ft., 

2 p.m., 17.06 ft., 37,200 sec.-ft., 6 p.m., 16.87 ft., 36,200 sec.-ft., 10 p.m., 16..60 

ft., 34,800 sec.-ft.; June 16, 4 a.m., 11.73 ft., 16,900 sec.-ft.
YAKIMA RIVER BASIN 169

Kachess Lake near Eastern, Wash.

Location.- Lat. 47°16', long. 121°12', at dam on Kachess River In SW£ sec. 34, T. 21 N., 

R. 13 E., at outlet of Kachess Lake, 2^ miles northwest of Easton. Datum of gage is 

at mean sea level (Bureau of Reclamation bench mark).

Drainage area.- 64 square miles.

Gage-height record.- Twice-daily staff-gage readings.

Remarks.- Reservoir is formed on natural lake by earth- and gravel-fill dam. Capacity, 

239,000 acre-feet between gate sill (elevation, 2,192.75 feet) and top of spillway 

gate (elevation, 2,262.00 feet). Records given herein represent usable contents. 

Records furnished by Bureau of Reclamation, reviewed and prepared for publication by 

Geological Survey.

Mean elevation*, in feet, and contents, in acre-feet, 1948

Day

~ZI

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change in contents, acrefeet

Change in contents, equivalent mean

second-feet

May

"Feet

55.49

55.47

55.51

55.59

55.68

55.77

55.94

56.03

56.09

56.11

56.09

56.09

56.13

56.17

56.16

56.17

56.19

56.25

56.28

56.41

56.68

57.17

57.65

58.09

58.44

58.90

59.44

60.31

60.47

60.15

59.89

Acre-feet

209,980

209,900

210,070

210,420

210,820

211,210

211,960

212,350

212,620

212,700

212,620

212,620

212,790

212,970

212,920

212,970

213,050

213,320

213,450

214,020

215,210

217,370

219,490

221,440

223,000

225,040

227,450

231,350

232,070.

230,630

229,470

+19,220

+313

June

Feet

59.75

60.03

60.25

60.42

60.50

60.68

60.86

61.08

61.27

61.40

61.53

61.62

61.56

61.58

61.58

61.65

61.81

61.86

61.90

61.97

62.08

62.13

62.16

62.18

62.10

62.05

62.00

61.98

61.99

61.97

Acre-feet

228,840

230,100

231,080

231,850

232,210

233,020

233,830

234,820

235,680

236,260

236,850

237,260

236,980

237,080

237,080

237,390

238,120

238,340

238,530

238,840

239,340

239,570

239,710

239,800

239,430

239,210

238,980

238,890

238,940

238,840

+9,370

+157

July

Feet

61.89

61.78

61.62

61.34

61.07

60.82

60.55

60.23

59.94

59.72

59.43

59.14

58.85

58.57

58.26

57.94

57.66

57.39

57.10

56.76

56.45

56.13

55.80

55.44

55. oa

54.74

54.38

54.05

53.69

53.34

52.98

Acre-feet

238,480

237,980

237,260

235,990

234,770

233,650

232,430

230,990

229,690

228,700

227,410

226,110

224,820

223,570

222,190

220,770

219,530

218,340

217,060

215,560

214,200

212,790

211,340

209,770

208,200

205,720

205,150

203,720

202,160

200,640

199,090

-39,750

-646

* Add 2,200 feet to obtain elevation above mean sea level.

824933 O - 49 - 13
I 70 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Kachess River near Easton, Wash.

Location.- Lat. 47°15'30", long. 121°11'50", in sec. 3, T. 20 N., R. 13 E., threequarters of a mile downstream from Kachess Lake and 2 miles northwest of Easton. 

Drainage area^- S4 square miles. 

Gage-height record.- "Water-stage recorder graph.

Discharge record. -"Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 2,530 second-feet 8 p.m. May 28 (gage height, 7.12

1903 to April 1948: Discharge, 2,240 second-feet (computed from gate opening at 

Kachess Lake) Aug. 27, 1920.

Remarks.- No diversion. Flow regulated by Kachess Lake. Figures of discharge not 

adjusted for change in contents. Records collected in cooperation with Bureau of 

Reclamation, who furnish some discharge measurements.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

302

296

306

329

353

393

448

488

500

500

June

1,200

1,090

1,090

1,110

1,130

1,140

1,160

1,190

1,220

1,220

July

642

642

915

1,040

990

965

940

915

890

868

Day

11

12

13

14

15

16

17

18

19

20

May

500

500

520

520

520

520

537

557

583

627

June

1,240

1,240

990

833

729

665

665

665

665

665

July

845

845

845

868

940

940

940

915

890

890

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ......... .....................................................

Runoff, in inches ............................................. .............................................................................

May

371

117

99

370

732

927

1,060

1,780

2,480

2,060

1,550

12.11

June

665

665

665

665

665

665

665

665

642

642

15.41

July

868

845

890

890

890

890

890

890

890

890

890

15.95

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

g

a

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.79 

3.82

536 

548

May 23

2.39 

2.40 

E*42 

2.42 

2.42 

2.42

95 

97 

102 

102 

102 

102

May 29

7.10 

7.10 

7.05 

7.04 

7.05 

7.04

Ju

5.03 

5.04 

5.04 

5.05 

5.05 

5.06

2,510 

2,510 

2,460 

2,460 

2,460 

2,460

ne 4

1,100 

1,110 

1,110 

1,120 

1,120 

1,120

June 10

5.26 

5.28

1,220 

1,230

June 16

4.10 

4.10

665

665

Gage 

height Discharge

May 18

3.84 

3.87

556 

568

May 24

2.42 

2.43 

3.47

4.22 

4.20

Mi

7.00 

6.98

6.44 

6.17 

6.17

102 

104 

409

719 

710

iy 30

2,420 

2,400

1,950 

1,760 

1,760

June 5

5.07 

5.07 

5.08 

5.08 

5.09 

5.10

1,120 

1,120 

1,130 

1,130 

1,140 

1,140

June 11

5.30 

5.30

1,240 

1,240

June 17

4.10 

4.10

665 

665

Gage 

height Discharge

May 19

3.90 

3.96

580 

604

May 25

4.25 

4.30

Mi

6.14 

6.12 

5.81 

5.80 

5.52 

5.54

732 

755

iy31

1,740 

1,720 

1,530 

1,520 

1,350 

1,360

June 6

5.11 

5.13

1,140 

1,160

June 12

5.29 

5.28

1,240 

1,230

June 18

4.10 

4.10

665 

665

Gage 

height Discharge

May 20

4.00 

4-. 10

620 

665

May 26

4.32

4.86 

4.90 

4.90 

4.90

764

1,020 

1,040 

1,040 

1,040

June 1

5.52 

5.52

4.98 

4.98

1,350 

1,350

1,080 

1,080

June 7

5.15 

5.18

1,160 

1,180

June 13

5.28 

4.47

4.47

1,230 

832

832

June 19

4.10 

4.10

665 

365

Gage 

height Discharge

May 21

4.13 

4.19 

2.52 

2.52 

2.52 

2.52

678 

706 

125 

125 

125 

125

May 27

4.92 

4.94 

4.96 

4.98 

5.00 

4.90

1,050 

1,030 

l,t)70 

1,080 

1,090 

1,040

June 2

5.00 

5.01 

5.02 

4.98

Ju

5.20 

5.22

1,090 

1,100 

1,100 

1,080

ne8

1,190 

1,200

June 14

4.47 

4.48

832

836

June 20

4.10 

4.10

665 

665

Gage 

height

M

2.52 

2.53 

2.54 

2.54 

2.39 

2.39

Discharge

iy22

125 

127 

130 

130 

95 

95

May 28

4.94

6.30 

6.92 

7.12 

7.10

1,060

1,850 

2,350 

2,530 

2,510

June 3

4.98 

4.97 

5.00 

5.02 

5.0? 

5.02

Ji

5.25 

5.25

1,080 

1,080 

1,090 

1,100 

1,100 

1,100

ne9

1,220 

1,220

June 15

4<,48 

4.48 

4.12 

4.10 

4.10 

4.10

836 

836 

674 

665 

. 665 

665

June 21

4.10 

4.10

665 

665
YAKIMA RIVER BASIN 171

Kaohess River near Easton, Wash.--Continued

Supplemental record; * 

May 21, 10 a.m., 4.19 ft., 706 sec.-ft.; 11 a.m., 2.52 ft., 125 sec.-ft. 

22, 5 p.m., 2.39 ft., 95 sec.-ft. 

24, 10 a.m., 2.43 ft., 104 sec.-ft.; 11 a.m., 3.40 ft., 382 sec.-ft.; 3 p.m.,

3.47 ft., 409 sec.-ft.; 6 p.m., 4.22 ft., 719 sec.-ft. 

26, 9 a.m., 4.34 ft., 773 sec.-ft.; 10 a.m., 4.84 ft., 1,010 sec.-ft. 

28, 9 a.m., 4.98 ft., 1,080 sec.-ft.; 2 p.m., 6.88 ft., 2,310 sec.-ft. 

30, 9 a.m., 4.98 ft., 1,080 sec.-ft.; 2 p.m., 6.88 ft., 2,310 sec.-ft. 

30, 9 a.m., 6.43 ft., 1,940 sec.-ft.; 2 p.m., 6.44 ft., 1,950 sec.-ft.;

5 p.m., 6.17 ft., 1,760 sec.-ft.

31,9 a.m., 5.82 ft., 1,530 sec.-ft.; 5 p.m., 5.51 ft., 1,350 sec.-ft. 

June 1, 10 a.m., 5.52 ft., 1,350 sec.-ft.; 11 a.m., 5.00 ft., 1,090 sec.-ft.;

1 p.m., 5.00 ft., 1,090 sec.-ft.; 2 p.m., 4.98 ft., 1,080 sec.-ft. 

13, 9 a.m., 5.28 ft., 1,230 sec.-ft.; 10 a.m., 4.47 ft., 832 sec.-ft. 

15, 9 a.m., 4.15 ft., 688 sec.-ft.
172 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Cle Elum Lake near Roslyn, Wash.

Location.- Lat.'47°15', long. 121°04', at dam on Cle Elum River, in NE£ sec. 10, T. 20 

N., R. 14 E., at outlet of Cle Elum Lake, 4 miles northeast of Roslyn. Datum of gage 

is at mean sea level (Bureau of Reclamation bench mark).

Drainage area.- 202 square miles.

Gage-height "record.- Twice-daily staff-gage readings.

Remarks.- Reservoir is formed on natural lake by earth- and gravel-fill dam. Capacity, 

436,000 acre-feet between gate sill (elevation, 2,110.00 feet) and top of spillway 

gate (elevation, 2,240.00 feet). Records given herein represent usable contents. 

Records furnished by Bureau of Reclamation, reviewed and prepared for publication by 

Geological Survey.

Mean elevation*, in feet, and contents, in acre-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change in contents, acrefeet

Change in contents, equivalent mean

second-feet

May

Feet

19.95

20.25

20.59

21.09

21.64

22.30

23.24

24.11

24.90

25.50

26.02

26.49

27.00

27.46

27.78

28.08

28.57

28.97

29.39

29.96

30.95

32.77

34.56

36.26

37.76

38.33

39.10

40.24

39.94

39.35

39.10

Acre-feet

345,100

346,410

347,890

350,080

352,500

355,400

359,550

363,410

366,920

369,600

371,930

374,040

376,330

378,400

379,850

381 , 200

383,430

385,250

387,170

389,780

394,330

402,750

411,100

419,100

426,220

428,940

432,630

438,100

436,660

433,820

432,630

+88,790

+1,444

June

Feet

39.15

39.38

39.81

40.08

40.24

40.23

40.16

40.23

40.22

40.10

40.17

40.20

39.99

39.90

39.87

40.11

40.34

40.27

40.13

40.01

40.08

40.17

40.16

40.05

39.96

40.04

40.10

40.17

40.32

40.46

Acre-feet

432,870

433,970

436,040

437,330

438,100

438,060

437,720

438,060

438,010

437,430

437,770

437,910

436,900

436,470

436,320

437,480

438,590

438,250

437,570

437,000

437,330

437,770

437,720

437,190

436,760

437,140

437,430

437,770

438,490

439,160

+6,530

+110

July

Feet

40.50

40.36

39.96

39.23

38.43

37.76

37.42

37.04

36.63

36.16

35.71

35.18

34.64

34.14

33.61

33.00

32.49

32.05

31.60

31.03

30.46

29.92

29.32

28.65

27.80

27.06

26.31

25.38

24.66

23.81

22.97

Acre-feet

439,360

438,680

436,760

433,250

429,420

426,220

424,600

422,790

420,850

418,620

416,500

414,010

411,480

409,140

403,660

403,820

401,450

399,410

397,330

394,700

392,080

389,600

386,850

383,790

379,940

376,600

373,230

369,060

365,850

362,080

358,360

-80,800

-1,314

* Add 2,200 feet to obtain elevation above mean sea level.
YAKIMA RIVER BASIN 173

Cle Elum River near Roslyn, Wash.

Location.- Lat. 47°14 I 0011 , long. 121°03'30", in SW£ sec. 11, T. 20 N., R. 14 E., 1,000 

feet downstream from dam at Cle Eltun Lake and 4 miles northwest of Roslyn.

Drainage area.- 202 square miles.

Gage-height record.- Water-stage recorder graph, except for period May 1 to May 9, when 

gage-heights were computed on basis of interpolation and one observation.

Discharge record.- Stage-discharge relationship defined by current-meter measurements 

below 6,380 second-feet and extended to peak stage. Gage heights used to hundredths 

May 17 to June 21; to half-tenths between 6.1 and 8.4 feet, hundredths below and 

tenths above these limits May 1-17, June 22 to July 31. Shifting-control method 

used May 28.

Maxima.- May-June 1948: Discharge, 11,000 second-feet 8 to 9 p.m. May 28 (gage height, 

IOJO feet).

1903 to April At8: Maximum discharge, 18,700 second-feet Nov. 15, 1906 (gage 

height, 14.05 feetTRemarks.- Flow partly regulated by Cle Elum Lake. Figures of discharge not adjusted 

for change in contents of Cle Elum Lake. Records collected and prepared in cooperation with Bureau of Reclamation,

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2.3

2.3

2.3

2.3

2.3

2.3

2.3

45

202

356

June

 4,380

4,290

4,510

4,730

5,290

6,140

6,320

6,360

6,380

5,880

July

2,140

2,100

3,090

3,200

3,200

2,560

2,140

2,140

2,140

2,190

Day

11

12

13

14

15

16

VI

18

19

20

May

474

580

722

830

920

1,010

1,130

1,240

1,420

1,640

June

5,440

5,390

4,440

3,600

2,820

2,610

3,150

3,260

3,230

2,950

July

2,190

2,190

2,190

2,190

2,190

2,240

2,190

2,190

2,190

2,190

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches ............................................................................................................................

May

1,140

296

315

844

3,400

5,480

5,980

9,090

9,490

5,800

4,650

1,841

10.51

June

2,840

2,870

2,770

2,670

2,240

2,060

2,060

2,060

2,100

2,140

3,833

21.17

July

2,240

2,240

2,370

2,420

2,420

2,420

2,470

2,470

2,470

2,470

2,520

2,366

13.51

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.58 

6.60 

6.61 

6.74 

6.77 

6.79

1,070 

1,080 

1,090 

1,180 

1,200 

1,210

May 23

5.12 

5.13 

5.13 

5.15 

5.16 

5.16

M

13.92 

13.88 

13.81 

13.20 

11.76 

11.47

Jl

10.17 

10.17 

10.17 

10.32 

10.33 

10.34

308 

312 

312 

320 

324 

324

iy29

10,800 

10,800 

10,600 

9,490 

7,010 

6,540

ne 4

4,650 

4,650 

4,650 

4,860 

4,870 

4,890

June 10

11.35 

11.26 

11.25 

10.73 

10.72 

10.72

6,360 

6,220 

6,200 

5,430 

5,420 

5,420

June 16

8.22 

8.21 

8.59 

8.62 

8.63 

8.64

2,390 

2,380 

2,760 

2,790 

2,800 

2,810

Gage 

height Discharge

May 18

6.80 

6.83 

6.78 

6.86 

6.88 

6.92

Ms

5.17

6.12 

7.45

M

11.43 

11.39 

10.74 

10.72 

10.55 

10.52

1,220 

1,240 

1,210 

1,260 

1,280 

1,300

y24

328

782 

1,680

iy30

6,480 

6,420 

5,450 

5,420 

5,180 

5,140

June 5

10.36 

10.49 

10.69 

10.87 

10.88 

10.90

4,910 

5,100 

5,380 

5,640 

5,650 

5,680

June 11

10.73 

10.75

5,430 

5,460

June 17

8.65 

9.04 

9.06 

9.07 

9.07 

9.07

2,820 

3,240 

3,270 

3,280 

3,280 

3,280

Gage 

height Discharge

May 19

6.94 

6.96 

6.99 

7.22 

7.26 

7.28

1,320 

1,330 

1,350 

1,510 

1,540 

1,560

May 25

8.78 

10.42 

10.93 

10.94

2,850 

4,730 

5,390 

5,400

May 31

10.50 

10.50 

9.92 

10.00

10.00

5,110 

5,110 

4,330 

4,430

4,430

June 6

10.90 

11.32 

11.33 

11.33 

11.33 

11.33

5,680 

6,310 

6,320 

6,320 

6,320 

6,320

June 12

10.71 

10.70 

10.70 

10.69 

10.68 

10.47

5,400 

5,390 

5,390 

5,380 

5,360 

5,070

June 18

9.07 

9.06 

9.05 

9.04 

9.03 

9.03

3,280 

3,270 

3,260 

3,240 

3,230 

3,230

wStl ««*«» 

May 20

7.32 

7.36 

7.40 

7.43 

7.47 

7.51

1,580 

1,610 

1,640 

1,660 

1,700 

1,730

May 26

11.00 

11.06

Ju

10.00 

10.00 

9.99 

9.99

3.87

Jl

11.33 

11.34

Ju

10.43 

10.08 

10.06 

9.69 

9.66 

9.66

5,480 

5,560

me 1

4,430 

4,430 

4,420 

4,420

4,260

ne7

6,320 

6,340

nel3

5,010 

4,530 

4,510 

4,030 

3,990 

3,990

June 19

9.03 

9.02

3,230 

3,220

Gage 

height

m

7.55 

7.58 

7.62 

5.32 

5.09 

5.08

Discharge

iy21

1,760 

1,780 

1,820 

388 

296 

292

May 27

11.08 

11.10 

11.14 

11.17 

11.98 

12.03

Ju

9.88 

9.88 

9.89 

9.90 

9.90 

9.91

5,590 

5,620 

5,680 

5,720 

6,880 

6,960

ne2

4,270 

4,270 

4,290 

4,300 

4,300 

4,310

June 8

11.35 

11.37

Ju

9.65 

9.35 

9.33 

9.17 

9.14 

9.14

6,360 

6,380

ne 14

3,980 

3,610 

3,590 

3,390 

3,360 

3,360

June 20

9.02 

8.69 

8.68 

8.67 

8.67 

8.67

3,220 

2,860 

2,850 

2,840 

2,840 

2,840

^[Discharge

May 22

5.08 

5.08 

5.09 

5.09 

5.10 

5.11

292 

292 

296 

296 

300 

304

May 28

12.05 

12.11

13.46 

14.00 

13.97

7,080 

7,280

9,820 

11,000 

10,900

June3

9.92 

10.08 

10.11

10.15 

10.16

Jl

11.37 

11.35

4,330 

4,530 

4,570

4,620 

4,640

ne9

6,380 

6,360

June 15

9.13 

8.70 

8.67 

8.27 

8.24 

8.23

3,350 

2,870 

2,840 

2,440 

2,410 

2,400

June 21

8.67 

8.67

2,840 

2,840
174 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Cle Elum River near Roslyn, Wash.--Continued

Supplemental record:

May 19, 1 p.m., 7.19 ft., 1,490 sec.-ft.

21, 1 p.m., 6.30 ft., 890 see.-ft.; 3 p.m., 6.09 ft., 764 sec.-ft.; 

5 p.m., 5.14 ft., 316 see.-ft.

24. 10 a.m., 5.18 ft., 332 sec.-ft.j 11 a.m., 6.04 ft., 734 sec.-ft.j 

5 p.m., 7.27 ft., 1,550 sec.-ft.; 6 p.m., 7.37 ft., 1,620 sec.-ft.

25. 7. a.m., 7.47 ft., 1,700 sec.-ft.; 9 a.m., 7.48 ft., 1,700 sec.-ft.; 

10 a.m., 8.02 ft., 2,140 sec.-ft.; 11 a.m., 8.72 ft., 2,790 sec.-ft.; 

2 p.m., 10.34 ft., 4,620 sec.-ft.; 5 p.m., 10.64 ft., 5,010 sec.-ft.;

6 p.m., 10.90 ft., 5,350 sec.-ft.

27. 5 p.m., 11.48 ft., 6,150 sec.-ft.; 6 p.m., 11.70 ft., 6,460 sec.-ft.;

7 p.m., 11.91 ft., 6,780" sec.-ft.

28. 9 a.m., 12.77 ft., 8,370 sec.-ft.; 10 a.m., 13.32 ft., A340 sec.-ft. 

11 a.m., 13.44 ft., 9,600 sec.-ft.; 5 p.m., 13.80 ft., W,500 sec.-ft. 

6 p.m., 14.00 ft., 10,900 sec.-ft.; 9 p.m., 14.00 ft., 11,000 sec.-ft.

29. 1 p.m., 13.58 ft., 10,200 sec.-ft.; 2 p.m., 13.26 ft., 9,600 sec.-ft. 

5 p.m., 12.60 ft., 8,410 sec.-ft.; 6 p.m., 12.08 ft., 7,530 sec.-ft.; 

7 p.m., 11.85 ft., 7,150 sec.-ft.; 11 p.m., 11.71 ft., 6,930 sec.-ft.

30. 9 a.m., 11.39 ft., 6,420 sec.-ft.; 10 a.m., 10.79 ft., 5,520 sec.-ft. 

7 p.m., 10.71 ft., 5,400 sec-.-ft.

31. 9 a.m., 10.00 ft., 4,430 sec.-ft.; 3 p.m., 9.91 ft., 4,310 sec.-ft. 

June 1, 10 a.m., 10.00 ft., 4,430 sec.-ft.; 5 p.m., 9.89 ft., 4,290 sec.-ft.; 

6 p.m., 9.87 ft., 4,260 sec.-ft.

3. 7 a.m., 9.93 ft., 4,340 sec.-ft.; 3 p.m., 10.13 ft., 4,600 sec.-ft.

4. 3 p.m., 10.18 ft., 4,660 sec.-ft.

5. 7 a.m., 10.36 ft., 4,910 sec.-ft.; 9 a.m., 10.50 ft., 5,110 sec.-ft.; 

11 a.m., 10.50 ft., 5,110 sec.-ft.; 2 p.m., 10.70 ft., 5,390 sec.-ft.; 

3 p.m., 10.82 ft., 5,560 sec.-ft.

6. 6 a.m., 10.90 ft., 5,680 sec.-ft.; 7 a.m., 11.30 ft., 6,280 sec.-ft. 

10, 7 a.m., 11.35 ft., 6,360 sec.-ft.; 1 p.m., 10.76 ft., 5,470 sec.-ft.; 

2 p.m., 10.74 ft., 5,450 sec.-ft.

12. 3 a.m., 10.76 ft., 5,470 sec.-ft.; 11 p.m., 10.67 ft., 5,350 sec.-ft.

13. 6 a.m., 10.42 ft., 5,000 sec.-ft.; 7 a.m., 10.11 ft., 4,570 sec.-ft.; 

1 p.m., 9.85 ft., 4,250 sec.-ft.; 3 p.m., 9.84 ft., 4,220 sec.-ft.; 

5 p.m., 9.67 ft., 4,000 sec.-ft.

14. 6 a.m., 9.65 ft., 3,980 sec.-ft.; 7 a.m., 9.38 ft., 3,650 sec.-ft.;

1 p.m., 9.20 ft., 3,430 sec.-ft.

15. 6 a.m., 9.13 ft., 3,350 sec.-ft.; 7 a.m., 8.78 ft., 2,960 sec.-ft.;

2 p.m., 8.67 ft., 2,840 sec.-ft.; 3 p.m., 8.31 ft., 2,480 sec.-ft.

16. 10 a.m., 8.21 ft., 2,380 sec.-ft.; 11 a.m., 8.55 ft., 2,720 sec.-ft.

17. 6 a.m., 8.66 ft., 2,830 sec.-ft.; 7 a.m., 9.00 ft., 3,200 sec.-ft. 

20, 6 a.m., 9.02 ft., 3,220 sec.-ft.; 7 a.m., 8.73 ft., 2,900 sec.-ft.
YAKIMA RIVER BASIN

Teanaway River near Cle Elum, Wash.

Location.- Lat. 47°12', long. 120°47', in SW£ sec. 25, T. 20 N., R. 16 E., 4 miles upstream from mouth and ?£ miles east of Cle Elum. 

Drainage area.- 205 square miles. 

Gage-height record.- Water-stage recorder graph prior to 2 p.m. May 27, once-daily staffgage readings thereafter, except for periods 2 p.m. May 27 to May 30, July 25-30,

when there was no gage-height record. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

2,240 second-feet and extended to peak stage. Gage heights used to hundredths.

Shifting-control method used May 29, 30. Discharge for periods of no gage-height

record computed on basis of interpolated gage heights or gage-height graph based on

floodmarks and records for Chiwawa River near Plain. 

Maxima.- May-June 1948: Discharge, 4,170 second-feet about 10 p.m. May 28 (gage height,

35.57 feet, from floodmarks).

1909-14, 1946 to April 1948: Discharge, 4.030 second-feet Mar. 20, 1910 (gage

height, 7.20 feet, site and datum then in use;. 

Remarks.- Small diversions in Teanaway Valley for irrigation. No regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

502

535

725

1,020

962

1,380

1,750

1,360

1,210

1,100

June

1,830

1,830

1,830

1,670

1,520

1,520

1,520

1,520

1,370

1,240

July

258

258

192

192

163

224

192

192

192

163

Day

11

12

13

14

15

16

17

18

19

20

May

1,070

1,090

1,150

1,060

1,030

1,150

1,220

1,200

1,230

2,240

June

1,370

1,240

1,110

885

709

709

1,110

885

792

792

July

163

163

135

135

135

110

110

110

88

88

Day

21

22

23

24

25

2fi

27

28

29

30

31

Monthly mean discharge, in second-feet .. ............. ........... ...... . . ...........

Runoff, in inches ............................................................................................................................

May

2,320

2,490

2,160

2,250

2,310

2,400

2,710

3,100

3,340

2,210

1,850

1,617

9.09

June

709

572

516

466

466

419

374

374

332

332

1,000

5.44

July

69

69

42

34

33

32

30

30

28

28

25

119

0.67

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

£

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

34.17 

34.17 

34.15 

34.13 

34.15 

34.17

1,240 

1,240 

1,220 

1,200 

1,220 

1,240

May 23

34.95 

34.87 

34.78 

34.72 

34.70 

34.80

2,420 

8,250 

8,070 

1,970 

1,930 

2,110

May 29

35.47 

35.48 

35.48 

35.47 

35.46 

35.44

3,830 

3,520 

3,310 

3,090 

2,870 

2,670

Gage 

height Discharge

May 18

34.17 

34.15 

34.12 

34.09 

34.12 

34.15

1,240 

1,220 

1,190 

1,160 

1,190 

1,220

May 24

34.90 

34.90 

34.83 

34.82 

34.89 

34.95

2,310 

2,310 

2,170 

2,150 

2,290 

2,420

May 30

35.41 

35.38 

35.33 

35.28 

35.24 

35.20

2,440 

2,230 

2,170 

2,090 

2,020 

1,950

Gage 

height Discharge

May 19

34.15 

34.13 

34.11 

34.10 

34.19 

34.40

1,220 

1,200 

1,180 

1,170 

1,260 

1,490

May 25

34.92 

34.87 

34.84 

34.84 

34.96 

34.99

2,350 

2,250 

2,190 

2,190 

2,440 

2,510

May 31

35.18 

35.15 

35.13 

35.12 

35.11 

35.09

1,920 

1,870 

1,830 

1,820 

1,800 

1,770

Gage 

height Discharge

May 20 

34.71 

34.86 

34.87 

34.90 

35.03 

35.06

1,950 

2,230 

2,250 

2,310 

2,600 

2,670

May 26

34.97 

34.92 

34.87 

34.83 

34.99 

35.09

2,460 

2,350 

2,250 

2,170 

2,510 

2,750

June 1

Gage 

height Discharge

May 21

35.03 

34.94 

34.83 

34.74 

34.84 

34.98

2,600 

2,400 

2,170 

2,000 

2,190 

2,490

May 27

35.18 

35.26 

35.14 

34.93 

34.90 

34.91

2,980 

3,200 

2,870 

2,380 

2,310 

2,330

June 2

Gage 

height Discharge

May 22

35.07 

35.02 

34.95 

34.88 

34.96 

35.02

2,700 

2,580 

2,420 

2,270 

2,440 

2,580

May 28

34.96 

35.04 

35.17 

35.32 

35.50 

35. 5£

2,440 

2,630 

2,950 

3,370 

3,930 

4,130

June 3

 Hour

8:10a

7:50a

6:40a

8:15a

8:10a

8:45a

Gage 

height Discharge

June 1 

35.13 1,830

June 2 

35.13 1,830

June 3 

35.13 1,830

June 4 

35.03 1,670

June 5 

34.93 1,520

June 6 

34.93 1,520

Hour

lla

7 ; 40a

8: 10s

7:45a

8a

8:10a

Gage 

height Discharge

June 6 

34.93 1,520

June 7 

34.93 1,520

June 8 

34.93 1,520

June 9 

34.83 1,370

 June 10 

34.73 1,240

June 11 

34.83 1,370

Hour

7:25a

8a

7:45a

7:45a

7:15n

7:05a

Gage 

height Discharge

June 12 

34.73 1,240

June 13 

34.63 1,110

June 14 

34.43 885

June 15 

34.23 709

June 16 

34.23 709

June 17 

34.63 1,110

Hour

7:10a

7:35a

7:45a

7:r>5a

Gage 

height Discharge

June 18 

34.43 885

June 19 

34.33 792

June 20 

34.33 792

June 21 

34.23 709

Supplemental record.- May 28, 10 p.m., 35.57 ft., 4,170 sec.-ft.
176 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Naches River below Tieton River, near Naches, Wash.

Location.- Lat. 46°44'40", long. 120°46'00", in SW-jNEi sec. 36, T. 15 N., R. 16 E., half 

a mile downstream from Wapatox power canal, three-quarters of a mile downstream from 

Tieton Hiver, and 5j miles northwest of Naches. Datum of gage is 1,550 feet above 

mean sea level (U. S. Coast and Geodetic Survey datum, as adjusted in 1929).

Drainage area.- 943 square miles.

Gage-height record.- Water-stage recorder graph.

STscharge record.- Stage-discharge relation defined by current-meter measurements below 

10,800 second-feet and extended to peak stage. Gage heights used to hundredths 

May 17 to June 21; half-tenths above and hundredths below 12.4 feet May 1-16, June 22 

to July 31.

Maxima.- May-June 1948: Discharge, 12,600 second-feet 4 p.m. May 28 (gage height, 17.58 

TeeT).

1905, 1908-12, 1915 to April 1948: Discharge, 32,200 second-feet Dec. 22, 23, 

1933 (gage height, 14.33 feet, site and datum then In use).

Remarks.- Flow regulated by Bumping Lake and Tieton Reservoir, and by diversion of Selah 

Valley, Tieton, and Wapatox Canals (total average diversion: May, 768 second-feet; 

June, 825 second-feet; July, 957 second-feet). Figures of discharge not adjusted for 

storage or diversions. Other small diversions above station are small percentage of 

flood discharge. Records collected and prepared in cooperation with Bureau of Reclamation, who furnish some discharge measurements.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,190

1,420

1,700

1,950

2,020

2,210

2,560

2,210

2,080

1,880

June

6,890

6,980

8,190

8,630

8,270

8,470

9,000

9,420

9,690

9,160

July

2,860

2,420

2,350

2,490

2,490

2,420

2,080

1,640

1,160

890

Day

11

12

13

14

15

16

17

18

19

20

May

1,820

1,880

2,080

2,020

1,950

2,020

2,280

2,560

2,630

3,410

June

9,850

9,110

7,380

6,490

5,500

5,950

6,180

5,430

4,910

A, 850

July

841

990

805

1,270

1,240

1,200

1,180

1,320

1,240

1,060

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .... . .

Runoff, in inches ........................... ....... ........ . ....... .............................................

May

4,410

5,080

5,030

5,350

7,090

8,690

10,100

11,800

10,600

8,420

7,250

4.96

June

4,850

4,420

3,950

3,680

3,520

3,340

3,260

3,020

2,720

3,180

7.35

July

930

900

841

814

787

769

760

769

680

570

584

1.59

Gage height, in feet, and discharge, in second-feet, at indicated time,

X

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

12.97 

13.02 

13.05 

13.05 

13.14 

13.22

Ms

14.72 

14.70 

14.67 

14.58 

14.55 

14.61

2,170 

2,240 

2,280 

2,280 

2,410 

2,520

y23

5,180 

, 5,140 

5,080 

4,890 

4,820 

4,950

May 29

17.23 

17.06 

16.88 

16.71 

16.55 

16.41

11,600 

11,100 

10,600 

10,100 

9,680 

9,300

June 4

16.22 

16.22 

16.18 

16.11 

16.07 

16.08

8,790 

8,790 

8,690 

8,510 

8,400 

8,430

June 10

16.45 

16.38 

16.34 

16.26 

16.31 

16.32

9,400 

9,220 

9,110 

8,900 

9,030 

9,050

June 16

14.96 

15.01 

15.09 

15.15 

15.19 

15.22

5,700 

5,810 

6,000 

6,140 

6,230 

6,300

Gage 

height Discharge

May 18

13.26 

13.27 

13.26 

13.23 

13.22 

13.25

2,580 

2,600 

2,580 

2,540 

2,520 

2,560

May 24

14.67 

14.68 

14.68 

14.79 

14.92 

15.46

M

16.30 

16.18 

16.11 

15.91 

15.84 

15.79

Ju

16.07 

16.03 

16.01 

15.98 

15.98 

16.01

Ju

16.37 

16.60 

16.74 

16.76 

16.72 

16.69

5,080 

5,100 

5,100 

5,330 

5,610 

6,860

iy30

9,000 

8,690 

8,510 

7,990 

7,810 

7,680

ne5

8,400 

8,300 

8,250 

8,170 

8,170 

8,250

nell

9,190 

9,810 

10,200 

10,200 

10,100 

10,100

June 17

15.25 

15.24 

15.22 

15.14 

15.07 

15.00

6,360 

6,340 

6,300 

6,110 

5,950 

5,790

Gage 

height Discharge

May 19

13.27 

13.27 

13.28 

13.29 

13.33 

13.40

2,600 

2,600 

2,610 

2,620 

2,680 

2,790

May 25

15.47 

15.51 

15.54 

15.56 

15.64 

15.74

6,890 

6,980 

7,060 

7,110 

7,310 

7,560

May 31

15.73 

15.68 

15.60 

15.53 

15.50 

15.52

Jl

16.07 

16.10 

16.10 

16.09 

16.12 

16.20

7,540 

7,410 

7,210 

7,040 

6,960 

7,010

ne6

8,400 

8,480 

8,480 

8,450 

8,530 

8,740

June 12

16.61 

16.51 

16.37 

16.19 

16.02 

15.94

9,840 

9,570 

9,190 

8,710 

8,270 

8,060

June 18

14.96 

14.90 

14.85 

14.76 

14.70 

14.67

5,700 

5,570 

5,460 

5,270 

5,140 

5,080

Gage 

height Discharge

May 20

13.52 

13.69 

13.85 

13.91 

13.98 

L14.12

2,970 

3,240 

3,520 

3,620 

3,740 

3,990

May 26

16.04 

16.10 

16.16 

16.34 

16.43 

16.28

Ju

15.53 

15.52 

15.49 

15.42 

15.38 

15.42

Ju

16.26 

16.30 

16.32 

16.31 

16.33 

16.36

8,320 

8,480 

8,640 

9,110 

9,350 

8,950

ne 1

7,040 

7,010 

6,940 

6,770 

6,670 

6,770

ne 7

8,900 

9,000 

9,050 

9,030 

9,080 

9,160

June 13

15.82 

15.75 

15.67 

15.58 

15.50 

15.43

7,760 

7,580 

7,380 

7,160 

6>960 

6,790

June 19

14.66 

14.62 

14.59 

14.57 

14.52 

14.51

5,060 

4,970 

4,910 

4,870 

4,760 

4,740

Gage 

height Discharge

May 21

14.25 

14.33 

14.38 

14.39 

14.40 

14.50

4,240 

4,390 

4,480 

4,500 

4,520 

4,720

May 27

16.51 

16.78 

16.82 

16.76 

16.77 

16.83

9,570 

10,300 

10,400 

10,200 

10,300 

10,400

June 2

15.46 

15.48 

15.48 

15.50 

15.56 

15.69

Ju

16.40 

16.42 

16.47 

16.52 

16.48 

16.55

Ju

15.38 

15.33 

15.27 

15.37 

15.22 

15.07

6,860 

6,910 

6,910 

6,960 

7,110 

7,440

ne8

9,270 

9,320 

9,460 

9,590 

9,490 

9,680

ne 14

6,670 

6,550 

6,410 

6,650 

6,300 

5,950

June 20

14.51 

14.76 

14.55 

14.55 

14.50 

14.51

4,740 

5,270 

4,820 

4,820 

4,720 

4,740

Gage 

height

M

14.63 

14.69 

14.72 

14.69 

14.68 

14.72

Discharge

iy22

4,990 

5,120 

5,180 

5,120 

5,100 

5,180

May 28

16.98 

17.28 

17.48 

17.58 

17.50 

17.39

10,900 

11,700 

12,300 

12,600 

12,300 

12,003

June 3

15.82 

15.89 

15.98 

16.10 

16.17 

16.21

7,760 

7,940 

8,170 

8,480 

8,660 

8,770

June 9

16.58 

16.59 

16.57 

16.58 

16.49 

16.49

9,760 

9,780 

9,730 

9,760 

9,510 

9,510

June 15

15.00 

14.92 

14.86 

14.77 

14.73 

14.81

5,790 

5,610 

5,480 

5,290 

5,200 

5,370

June 21

14.55 

14.60 

14.60 

14.57 

14.54 

14.50

4,820 

4,930 

4,930 

4,870 

4,800 

4,720
YAKIMA RIVER BASIN 177

Bumping Lake near Nile, Wash.

Location.- Lat. 46°52', long. 121°18', at dam on Bumping River in SW£ sec. 23 (unsurve'yed), T. 16 N., R. 12 E., at outlet of Bumping Lake, llj miles upstream from 

American River, and 19 miles west of Nile. Datum of gage is at mean sea level (Bureau 

of Reclamation bench mark).

Drainage area.- 68 square miles.

Gage-height record.- Staff gage read twice daily.

Remarks.- Reservoir is formed on natural lake by earth-fill dam. Capacity, 33,800 aerefeet between gate sill (elevation, 3,389.00 feet) and spillway crest (elevation, 

3,426.00 feet). Records given herein represent usable contents. Water used for irrigation. Records furnished by Bureau of Reclamation, reviewed and prepared for publication by Geological Survey.

Elevation,* in feet, and contents, in acre-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change in contents, acrefeet

Change in contents, equivalent mean

second-feet

May

Feet

5.92

6.02

6.15

6.23

6.28

6.29

6.50

7.07

7.44

7.77

7.95

8.17

8.48

8.69

8.86

9.08

9.33

9.65

10.07

10.55

11.47

12.70

14.08

15.36

17.21

19.52

22.42

25.78

27.63

27.89

27.85

Acre-feet

11,940

12,030

12,140

12,210

12,250

12,260

12,440

12,930

13,260

13,550

13,710

13,910

14,190

14,380

14,540

14,740

14,970

15,270

15,670

16,130

17,030

18,260

19,690

21,050

23,080

25,710

29,180

33,420

35,860

36,210

36,160

+24,290

+395

June

Feet

27.88

27.99

28.11

28.19

28.16

28.24

28.41

28.49

28.46

28.39

28.40

28.29

28.03

27.85

27.71

27.69

27.76

27.72

27.66

27.61

27.58

27.50

27.47

27.44

27.42

27.41

27.40

27.41

27.45

27.46

Acre-feet

36,200

36 , 340

36,500

36,610

36,570

36,680

36,910

37,020

36,980

36,880

36 , 900

36,750

36,400

36,160

35,970

35,940

36,030

35,980

35,900

35,830

35,790

35,690

35,650

35,610

35,580

35,570

35,550

35,570

35,620

35,630

-530

-8.9

July

Feet

27.44

27.41

27.37

27.28

27.18

27.08

27.03

26.97

26.93

26.89

26.85

26.83

26.80

26.79

26.78

26.76

26.74

26.78

26.77

26.71

26.62

26.51

26.39

26.28

26.15

26.02

25.79

25.56

25.35

25.12

24.89

Acre-feet

35,610

35,570

35,510 -

35,390

35,260

35,130

35,060

34,980

34,930

34,880

34,820

34,800

34,760

34,740

34,730

34,700

34,680

34,730

34,720

34,640

34,520

34,370

34,220

34,070

33,900

33,730

33,440

33,140

32,870

32,570

32,280

-3,350

-54

Add 3,400.00 feet to obtain elevation above mean sea level.
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Bumping River near Nile, Wash.

Location.- Lat. 46°52', long. 121°18', a quarter of a mile downstream from spillway of

Bumping Lake Dam and 19 miles west of Nile, Yakima County. 

Drainage area.- 68 square miles. 

Gage-height "record.- Water-stage recorder graph.

July 31.

Maxima.- May-June 1948: Discharge, 1,860 second-feet 6:45 a.m. June 8 (gage height, 

5.35 feet).

1906, 1909 to April 1948: Discharge, 5,180 second-feet Dec. 29, 1917 (gage 

height, 9.33 feet).

Remarks.- Flow regulated by Bumping Lake. Figures of discharge not adjusted for change 

in contents of Bumping Lake. No diversion. Records collected and prepared in cooperation with Bureau of Reclamation.

Mean discharge, in second-feet, 194.8

Day

1

2

3

4

5

6

7

8

9

10

May

188

188

196

216

274

295

302

305

309

313

June

1,300

1,410

1,570

1,560

1,540

1,620

1,750

1,810

1,800

1,730

July

760

640

575

531

470

498

484

430

388

371

Day

11

12

13

14

15

16

17

18

19

!>0

May

313

316

316

320

320

324

328

329

334

343

June

1,760

1,600

1,380

1,230

1,120

1,140

1,150

1,060

1,000

1,000

July

363

343

331

316

302

295

295

331

291

281

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet.... .............. . .... ....... ................................

Runoff, in inches ............................................................................................................................

May

359

376

393

372

301

318

303

397

1,130

1,300

1,240

397

6.74

June

982

880

820

790

760

760

760

760

820

820

1,223

20.06

July

305

281

264

271

288

298

305

305

305

305

305

372

6.30

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.78 

2.78

328 

328

May 23

2.94 

2.96

392 

400

May 29

4.00 

4.26 

4.40 

4.50 

4.56 

4.60

940 

1,100 

1,180 

1,250 

1,290 

1,320

June 4

4.99 

4.97 

4.93 

4.90 

4.89 

4.91

1,590 

1,580 

1,550 

1,530 

1,520 

1,540

June 10

5.24 

5.21 

5.15 

5.12 

5.19 

5.20

Ju

4.26 

4.30 

4.34 

4.38 

4.40 

4.39

1,770 

1,750 

1,700 

1,680 

1,730 

1,740

ne!6

1,100 

1,120 

1,140 

1,170 

1,180 

1,170

Gage 

height Discharge

May 18

2.78 

2.79

328 

331

May 24

2.97 

2.78 

2.78 

2.71

404 

328 

328 

302

May 30

4.61 

4.60 

4.59 

4.55 

4.53 

4.52

1,330 

1,320 

1,310 

1,280 

1,270 

1,260

June 5

4.91 

4.91 

4.88 

4.88 

4.90 

4.97

1,540 

1,540 

1,520 

1,520 

1,530 

1,580

June 11

5.22 

5.23 

5.23 

5.24 

5.23 

5.20

1,760

1,760 

1,760 

1,770 

1,760 

1,740

June 17

4.41 

4.39 

4.35 

4.31 

4.29 

4.28

1,190 

1,170 

1,150 

1,130 

1,110 

1,110

Gage 

height Discharge

May 19

2.80 

2.80

335 

335

May 25

2.72 

2.69 

2.69 

2.70 

2.72 

2.73

305 

295 

295 

298 

305 

309

May 31

4.51 

4.49 

4.47 

4.48 

4.49 

4.52

1,260 

1,240 

1,230 

1,240 

1,240 

1,260

June 6

5.00 

5.01 

5.00 

5.00 

5.06 

5.14

1,600 

1,610 

1,600 

1,600 

1,640 

1,700

June 12

5.14 

5.08 

5.00 

4.91 

4.88 

4.81

1,700 

1,660 

1,600 

1,540 

1,520 

1,470

June 18

4.27 

4.24 

4.20 

4.15 

4.13 

4.13

1,100 

1,080 

1,060 

1,030 

1,020 

1,020

Gage 

height Discharge

May 20

2.82 

2.84

343 

351

May 26

2.74 

2.75 

2.75 

2.77 

2.78 

2.74

313 

316 

316 

324 

328 

313

June 1

4.56 

4.57 

4.58 

4.57 

4.60 

4.65

1,290 

1,300 

1,310 

1,300 

1,320 

1,360

June 7

5.20 

5.21 

5.20 

5.21 

5.24 

5.29

1,740 

1,750 

1,740 

1,750 

1,770 

1,810

June 13

4.78 

4.74 

4.69 

4.63 

4.59 

4.58

1,450 

1,420 

1,380 

1,340 

1,310 

1,310

June 19

4.12 

4.12 

4.12 

4.09 

4.07 

4.08

1,010 

1,010 

1,010 

994 

982 

988

Gage 

height Discharge

May 21

2.86 

2.88

359 

367

May 27

2.77 

2.71 

2.68 

2.68 

2.69 

2.70

324 

302 

291 

291 

295 

298

June 2

4.69 

4.70 

4.70 

4.72 

4.78 

4.85

Ju

5.34 

5.14 

5.21 

5.29 

5.30 

5.32

1,380 

1,390 

1,390 

1,400 

1,450 

1,500

ne8

1,850 

1,700 

1,830 

1,810 

1,820 

1,840

June 14

4.56 

4.50 

4.45 

4.41 

4.39 

4.38

1,290 

1,250 

1,220 

1,190 

1,170 

1,170

June 20

4.10 

4.11 

4.10 

4.09 

4.10 

4.10

1,000 

1,010 

1,000 

994 

1,000 

1,000

Gage 

height Discharge

May 22

2.90 

2.93

375 

388

May 28

2.71 

2.72 

2.71 

2.86 

3.42 

3.64

Ju

4.92 

4.96 

4.97 

4.98 

4.99 

5.00

Ju

5.32 

5.27 

5.28 

5.24 

5.25 

5.25

302 

305 

302 

359 

615 

727

ne3

1,540 

1,570 

1,580 

1,590 

1,590 

1,600

ne 9

1,840 

1,800 

1,800 

1,770 

1,780 

1,780

June 15

4.35 

4.32 

4.29 

4.23 

4.25 

4.26

1,150 

1,130 

1,110 

1,080 

1,090 

1,100

June 21

4.11 

4.09 

4.08 

4.06 

4.02 

4.00

. 1,010 

994 

988 

976 

952 

940

Supplemental record.- May 24, 2 p.m., 2.97 ft., 404 sec.-ft.; May 27, 7 a.m., 2.78 

ft., 328 sec.-ft.; May 28, 2 p.m., 2.71 ft., 302 sec.-ft.
YAKIMA RIVER BASIN 179

American River near Nile, Wash.

Location.- Lat. 46°58'30", long. 121°10'10", in SW£ sec. 12, T. 17 N., R. 13 E., 300 

feet upstream from Bumping Lake road crossing, three-quarters of a mile upstream 

from mouth, and 16 miles northwest of Nile. Datum of gage ia 2,700.0 feet above 

mean sea level (Washington State Highway Department bench mark).

Drainage area.- 79 square miles.

Gage-height record.- Water-stage recorder graph except for period 5 a.m. May 27 to 12 

p.m. May 28, for which graph was drawn based on floodmark.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths May 1 to June 21; half-tenths between 73.90 and 

75.90, hundredths below and tenths above these limits June 22 to July 31. Shifting-control method used May 27.

Maxima.- May-June 1948: Discharge, 2,600 second-feet about 10 p.m. May 27 (gage height, 

76.60 feet, from floodmark in well).

1909-11, 1913-15, 1939 to April 1948: Discharge observed, 1,580 second-feet 

June 2, 1909 (gage height, 4.55 feet, datum then in use).

Remarks.- No diversion or regulation. Records collected in cooperation with Bureau of 

Reclamation, who furnish some discharge measurements.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

226

220

240

261

268

368

522

488

437

413

June

1,180

1,260

1,430

1,430

1,360

1,430

1,540

1,610

1,550

1,490

July

602

490

441

414

379

388

375

345

309

309

Day

11

12

13

14

15

16

17

18

19

20

May

398

421

458

437

425

454

506

524

536

657

June

1,610

1,380

1,050

951

843

838

836

732

702

750

July

313

284

277

270

270

250

250

280

250

228

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ... . . .... .. ..

Runoff, in inches .................................. ...... ........................... ......................................................

May

888

1,120

1,150

1,240

1,480

1,710

2,330

2,420

1,830

1,330

1,140

803

11.72

June

740

662

624

602

580

- 575

596

673

690

695

1,014

14.32

July

219

202

193

177

1S4

154

151

146

134

128

122

275

4.01

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

75

Gage 

height Discharge

May 17

73.76 

73.79 

73.80 

73.81 

73.82 

73.83

492 

505 

509 

514 

513 

522

May 23

74.99 

74.94 

74.90 

74.87 

74.92 

75.00

1,190 

1,160 

1,130 

1,110 

1,140 

1,200

May 29

75.92 

75.79 

75.67 

75.42 

75.32 

75.21

Ju

75.17 

75.13 

75.08 

75.00 

74.95 

74.96

2,060 

1,950 

1,860 

1,670 

1,600 

1,530

ne 4

1,500 

1,470 

1,440 

1,380 

1,340 

1,350

June 10

75.22 

75.22 

75.18 

75.09 

75.07 

75.09

1,530 

1,530 

1,510 

1,440 

1,430 

1,440

June 16

74.11

74.13 

74.16 

74.18 

74.19 

74.21

811

823 

841 

853 

859 

871

Supplemental i

31 ft. , 1,600

Gage 

height Discharge

May 18

73.84 

73.84 

73.83 

73.82 

73.83 

73.85

527 

527 

522 

518 

522 

532

May 24

75.02 

75.03 

75.02 

75.02 

75.13 

75.24

1,210 

1,220 

1,210 

1,210 

1,290 

1,370

May 30

75.10 

75.01 

74.90 

74.81 

74.76 

74.72

1,450 

1,390 

1,310 

1,250 

1,210 

1,180

June 5

75.01 

75.03 

75.01 

74.93 

74.90 

74.99

1,390 

1,400 

1,390 

1,330 

1,310 

1,370

June 11

75.24 

75.34 

75.39 

75.38 

75.37 

75.35

1,550 

1,620 

1,650 

1,650 

1,640 

1,620

June 17

74.22 

74.21 

74.18 

74.11 

74.06 

74.03

877 

871 

853 

811 

783 

766

Gage 

height Discharge

May 19

73.85 

73.85 

73.85 

73.85 

73.87 

73.93

532 

532 

532 

532 

540 

568

May 25

75.30 

75.36 

75.39 

75.33 

75.43 

75.55

1,420 

1,470 

1,490 

1,480 

1,520 

1,620

May 31

74.71 

74.69 

74.65 

74.59 

74.61 

74.67

1,180 

1,160 

1,140 

1,100 

1,110 

1,150

June 6

75.08 

75.12 

75.09 

75.02 

75.05 

75.11

1,440 

1,460 

1,440 

1,390 

1,420 

1,460

June 12

75.26 

75.15 

75.00 

74.89 

74.73 

74.63

1,560 

1,480 

1,380 

1,300 

1,190 

1,120

June 18

74.02 

74.01 

73.98 

73.93 

73.90 

73.90

761 

756 

739 

712 

695 

695

Gage 

height Discharge

May 20

73.99 

74.03 

74.08 

74.15 

74.25 

74.36

596 

616 

641 

677 

730 

791

May 26

75.67 

75.67 

75.64 

75. SO 

75.70 

75.86

1,720 

1,720 

1,690 

1,660 

1,740 

1,870

June 1

74.72 

74.73 

74.72 

74.69 

74.70 

74.76

1,180 

1,190 

1,180 

1,150 

1,170 

1,210

June 7

75.23 

75.29 

75.29 

75.23 

75.19 

75.26

1,540 

1,580 

1,580 

1,540 

1,510 

1,560

June 13

74.60 

74.56 

74.51 

74.46 

74.42 

74.41

1,100 

1,080 

1,050 

1,020 

997 

991

June 19

73.92 

73.94 

73.91 

73.39 

73.39 

73.94

706 

717 

700 

690 

690 

717

Gage 

height Discharge

May 21

74.44 

74.48 

74.49 

74.55 

74.65 

74.76

836 

859 

865 

900 

960 

1,030

May 27

76.06 

76.25 

76.41 

76.52 

76.58 

76.58

2,060 

2,230 

2,390 

2,500 

2,570 

2,580

June 2

74.83 

74.87 

74.90 

74.78 

74.80 

74.86

Ju

75.32 

75.38 

75.40 

75.31 

75.28 

75.27

1,260 

1,290 

1,310 

1,230 

1,240 

1,280

ne 8

1,600 

1,650 

1,660 

1,600 

1,580 

1,570

June 14

74.42 

74.40 

74.35 

74.31 

74.26 

74.23

997 

985 

955 

931 

901 

883

June2Q

74.01 

74.03 

74.01 

73.99 

73.98 

74.01

756 

766 

756 

744 

739 

756

Gage 

height Discharge

May 22

74.83 

74.90 

74.89 

74.90 

74.93 

74.96

1,080 

1,130 

1,120 

1,130 

1,150 

1,170

May 28

76.55 

76.49 

76.41 

76.30 

76.19 

76.06

2,560 

2,510 

2,450 

2,360 

2,270 

2,170

June 3

74.96 

75.07 

75.10 

75.13 

75.15 

75.17

Ju

75.32 

75.31 

75.26 

75.19 

75.17 

75.18

1,350 

1,430 

1,450 

1,470 

1,480 

1,500

ne 9

1,600 

1,600 

1,560 

1,510 

1,500 

1,510

June 15

74.22 

74.21 

74.18 

74.12 

74.08 

74.10

877 

871 

853 

817 

794 

805

June 21

74.03 

74.03 

74.00 

73.96 

73.92 

73.90

766 

766 

750 

728 

706 

695

 eeord.- May 27, 10 p.m., 76.60 ft., 2,600 sec. -ft.; June 7, 10 a.m.,
180 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Tleton Reservoir near Naohes, Wash.

Location.- Lat. 46°39', long. 121°07', in SW£ sec. 31 (unsurveyed), T. 14 N., R. 14 E., 

on face of dam on Tleton River, at spillway, 2,000 feet upstream from Wildcat Creek, 

at Rimrock, 7£ miles upstream from headworks of Tleton Canal, and 22| miles southwest of Naches. Datum of gage is at mean sea level (Bureau of Reclamation bench 

mark).

Drainage area.- 187 square miles.

Gage^^lght record.- Staff-gage read twice daily.

Remarks '.- Reservoir is formed by earth- and gravel-fill dam. Capacity, 197,000 acrefeet between sill of tunnel entrance (elevation, 2,766.00 feet) and crest of spillway gates (elevation, 2,926.00 feet). Records given herein represent usable contents. Water used for Irrigation. Records furnished by Bureau of Reclamation, 

reviewed and prepared for publication by Geological Survey.

Elevation,* in feet, and contents, in acre-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Change In contents, acrefeet

Change in contents, equivalent mem

second-feet

May

Peet

8.37

8.13

7.71

7.24

6.76

6.64

6.99

7.71

8.35

8.96

9.49

10.03

10.62

11.17

11.71

12.25

12.78

13.18

13.56

14.07

14.83

15.92

17.11

18.27

18.74

19.07

20.35

22.18

23.57

24.43

25.05

Acre-feet

156,650

156,120

155,210

154,190

153,150

152,890

153,650

155,210

156,600

157,940

159,100

160,290

161,600

162,820

164,030

165,240

166,440

167,340

169,210

169,370

171,110

173,620

176,390

179,120

180,230

181,020

184,080

188,510

191,930

194,060

195,610

+38,900

+633

June

Feet

25.64

26.24

26.59

26.84

26.81

26.85

26.94

27.05

27.10

27.13

27.24

27.15

26.91

26.75

26.62

26.74

26.80

26.66

26.56

26.56

26.59

26.53

26.41

26.32

26.30

26.25

26.22

26.28

26.68

26.87

Acre-feet

197,090

198,603

199,490

200,130

200,050

200,150

200,380

200,660

200,790

200,830

201,150

200,920

200,300

199,900

199,570

199,870

200,020

199,670

199,410

199,410

199,490

199,340

199,030

193,800

198,750

198,630

198,550

198,700

199,720

200,200

+4,590

+77

July

Feet

26.82

26.71

26.58

26.18

25.62

25.10

24.80

24.66

24.73

24.94

25.22

25.37

25.40

25.20

24.83

24.57

24.28

24.06

23.78

23.48

23.26

23.06

22.82

22.53

22.20

21.88

21.58

21.31

20.98

20.72

20.46

Acre-feet

200,030

199,800

199,460

198,450

197,040

195,730

194,980

194,630

194,810

195,330

196,030

196,410

196,430

195,980

195,180

194,410

193,690

193,140

192,440

191,700

191,160

190,670

190,080

189,370

188,560

187,780

187,050

186,400

185,600

184,970

184,340

-15,860

-258

* Add 2,900.00 feet to obtain elevation above mean sea level.
YAKIMA RIVER BASIN 181

Tleton River at Tieton Dam, near Naches, Wash.

Location.- Lat. 46°39'30", long. 121°07'20", 900 feet upstream from Wild Cat Creek, 

1,200 feet downstream from Tleton Dam, 19 miles upstream from Oak Creek, and 

22 miles southwest of Naches, Yakima County.

Drainage area.- 187 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

2,500 second-feet and extended to peak stage. Gage heights used to hundredths May 

17 to June 21; half-tenths above and hundredths below 4.4 feet May 1-16, June 22 to 

July 31.

Maxima.- May-June 1S48: Discharge, 2,930 second-feet 10 p.m. June 11 (gage height, 

S~753" feet).

1908-14, 1918-19, 1925 to April 1948: Dl&charge, 8,450 second-feet Doc. 22, 

1933 (gage height, 9*24 feet).

Reraarks^- No diversion. Plow regulated by Tleton Reservoir. Figures of discharge not 

adjusted for change In reservoir contents. Records collected and prepared In cooperation with Bureau of Reclamation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

518

869

1,040

1,120

1,040

689

258

113

121

121

June

1,060

1,280

1,980

2,270

2,250

2,300

2,430

2,510

2,620

2,570

July

1,200

965

1,320

1,550

1,640

1,420

 1,080

730

446

345

Day

11

12

13

14

1ft

1fi

17

18

19

20

May

145

159

154

152

152

154

291

428

451

439

June

2,790

2,640

2,240

1,990

1,800

2,040

2,120

1,890

1,730

1,690

July

402

488

679

1,040

1,040

1,040

1,040

1,040

1,040

928

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .................. ..... . .... . _ .....

Runoff, in inches .............................................................. ....................................................

May

348

238

248

657

1,690

2,040

1,230

1,070

1,080

1,090

1,070

619

3.81

June

1,740

1,600

1,460

1,370

1,320

1,280

1,280

897

905

1,320

1,846

11.01

July

890

890

890

890

890

890

890

890

806

778

834

935

5.76

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.51 428

May 23

3.03 

3.06

Mi

4.56

248 

257

iy29

1,090

June 4

5.87 

5.89 

5.36 

5.07 

5.68 

5.83

2,270 

2,290 

2,260 

2,270 

2,280 

2,250

June 10

6.19 

6.18 

6.15

6.15

2,590 

2,580 

2,550

2,550

June 16

5.43 

5.58 

5.68 

5.77 

5.79 

5.80

1,850 

1,980 

2,080 

2,170 

2,190 

2,200

Gage 

height Discharge

May 18

3.51 428

May 24

3.06 

3.12 

4.19 

4.33 

5.09 

5.19

M,

4.56

Ju

5.88 

5.85 

5.84 

5.82 

5.84 

5.88

257 

277 

301 

353 

1,540 

1,530

iy30

1,090

ne 5

2,280 

2,260 

2,240 

2,220 

2,240 

2,280

June 11

6.21 

6.32 

6.50 

6.50 

6.48 

6.47

2,610 

2,720 

2,900 

2,900 

2,880 

2 , 870

June 17

5.80 

5.80 

5.73 

5.68 

5.64 

5.60

Supplemental record.

sec.-fl.; May 20, 7 a.m 

24, 6 p.m., 5.03 ft., 1 

10 a.m. , 4.54 ft., 1,07 

2 a.m., 6.51 ft., 2,910

2,200 

2,200 

2,130 

2,080 

2,040 

2,000

Gage 

height Discharge

May 19

3.51 

3.59

3.60

3.60

428 

464 

469

469

May 25

5.26 

5.27 

5.23 

5.24 

5.28 

5.37

1,690 

1,700 

1,670 

1,680 

1,710 

1,790

May 31

4.56 

4.53

4.53

Ji

5.38 

5.90 

5.90' 

5.89 

5.92 

5.97

Ju

6.39 

6.30 

6.23 

6.16 

6.09 

S.OO

1,090 

1,060

1,060

ne6

2,280 

2,300 

2,300 

2,290 

2,320 

2,370

ne!2

2,790 

2,700 

2,630 

2,560 

2,490 

2,400

June 18

5.57 

5.52 

5.47 

5.41 

5.40 

5.37

1,970 

1,930 

1,880 

1,830 

1,820 

1,790

Gage 

height Discharge

May 20

3.50 424

May 26

5.46 

5.81

6.10 

6.10 

5.05 

5.04

1,870 

2,210 

2,500 

2,500 

1,500 

1,500

June 1

4.53 1,060

June 7

6.04 

6.05 

6.01 

6.02 

6.04 

6.08

2,440 

2,450 

2,410 

2,420 

2,440 

2,480

June 13

5.96 

5.90 

5.84 

5.78 

5.72 

5.59

2,360 

2,300 

2,240 

 ^,183 

2,120 

2,090

June 19

5.34 

5.32 

5.32 

5.27 

5.22 

5.22

1,770 

1,750 

1,750 

1,700 

1,660 

1,660

Gage 

height Discharge

May 21

3.50 

3.03 

3.00

424 

248 

238

May 27

5.04 

5.03

4.57 

4.53 

4.53

Ju

4.56 

4.63 

4.77 

4.90 

5.04 

5.18

Ju

6.13 

6.11 

6.11 

6.08 

6.11 

6.20

1,500 

1,490

1,100 

1,060 

1,060

ne 2

1,090 

1,140 

1,260 

1,370 

1,500 

1,620

ne8

2,530 

2,510 

2,510 

2,480 

2,510 

2,600

June 14

5.66 

5.61 

5.60 

5.56 

5.52 

5.50

2,060 

2,010 

2,000 

1,960 

1,930 

1,910

June 20

5.23 

5.25 

5.27 

5.27 

5.27 

5.28

1,670 

1,680 

1,700 

1,700 

1,700 

1,710

Gage 

height Discharge

May 22

3.00 

3.01

238

241

May 28

4.55 1,080

June 3

5.31 

5.49 

5.65 

5.69 

5.76 

5.81

1,740 

1,900 

2,050 

2,090 

2,160 

2,210

June 9

6.20 

6.25 

6.26 

6.19 

6.20 

6.20

2,600 

2,650 

2,660 

2,590

2,600 

2,600

June 15

5.46 

15.40 

5.36 

5.3U 

5.31 

5.34

1,870 

1,820 

1,780 

1,730 

1,740 

1,770

June 21

5.31 

5.31 

5.32 

5.33 

5.30 

5.28

1,740 

1,740 

1,750 

1,760 

1,730 

1,710

- May 17, 11 a.m., 2.70 ft., 154 sec. -ft., 1 p.m., 3.51 ft., 428 

, 3.60 ft., 469 sec. -ft., 9 a.m., 3.50 ft., 424 sec. -ft.} May 

490 sec. -ft.; May 26, 6 a.m., 5.71 ft., 2,110 sec. -ft.; May 27, 

D sec. -ft.; June 11, 10 p.m., 6.53 ft., 2,930 sec. -ft.; June 12, 

sec. -ft.
FLOODS OP MAY-JUKE 1948 IN COLUMBIA RtVER BASIN

TIeton River at headworks of Tieton Canal, near Naches, Wash.

Location.- Lat. 46°40'10", long. 121°00'20", in sec. 30, T. 14 N., R. 15 E. (unsurveyed),Just downstream from intake of Tieton Canal, 12 miles upstream from Oak Creek, 

and 16 miles southwest of Naches,,

Drainage area.- 240 square miles.

Page-height "record.- Water-stage recorder graph.

Discharge record°-~Stage-discharge relation defined by current-meter measurement below 

2,200 second-feet and extended to peak stage. Gage heights used to hundredths May 1 

to June 21; half-tenths above 3.9 feet and hundredths below June 22 to July 31.

Maxima.- May-June 1948: Discharge, 2,960 second-feet 3 p.m. June 11, 1948 (gage height,

 5757 feet).

1907 to April 1948: Discharge, 8,910 second-feet Dec. 22, 1933 (gage height, 

9.70 fee.t).

Remarks.- Diversion for irrigation by Tieton Canal (average diversion: May, 185 secondfeet; June, 260 second-feet; July, 531 second-feet). Plow regulated by Tieton Reservoir. Figures of discharge not adjusted for diversion or change in reservoir contents. Records collected and prepared in cooperation with Bureau of Reclamation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

448

863

1,030

1,120

1,070

754

311

99

90

84

June

1,120

1,290

1,980

2,220

2,150

2,220

2,390

2,480

2,550

2,550

July

912

701

945

1,200

1,340

1,160

810

570

168

53

Day

11

12

13

14

15

16

17

18

19?,o

May

94

114

106

9?

94

106

216

385

419

532

June

2,860

2,580

2,220

1,870

1,640

2,020

2,080

1,800

1,620

1,570

July

342

161

300

685

685

685

685

693

693

615

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

477

372

359

859

1,980

2,300

1,510

1,300

1,220

1,180

1,150

669

3.21

June

1,610

1,490

1,300

1,200

1,160

1,120

1,070

779

615

1,030

1,753

8.15

July

556

556

570

563

563

563

563

563

502

434

502

624

3.00

Gage height, in feet, and discharge, in second-feet, at indicated time, 194S

1

4 8' 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.18 

2.18 

2.18 

2.88 

2.89 

2.90

111 

111 

111 

374 

379 

384

May 23

2.86 

2.83 

2.80 

2.83 

2.89 

2.89

364 

348 

333 

348 

379 

379

May 29

4.00 

3.97 

3.95 

3.94 

3.94 

3.94

1,250 

1,220 

1,200 

1,200 

1,200 

1,200

June 4

5.00 

5.01 

4.98 

4.98 

5.01 

4.94

2,230 

2,240 

2,210 

2,210 

2,240 

2,170

June 10

5.30 

5.27 

5.25 

5.37 

5.31 

5.30

Ju

4.58 

4.80 

4.84 

4.90 

4.92 

4.92

2,550 

2,520 

2,500 

2,630 

2,560 

2,550

ne!6

1,810 

2,030 

2,070 

2,130 

2,150 

2,150

Gage 

height Discharge

May 18

2.90 

2.90 

2.90 

2.89 

2.91 

2.91

384 

384 

384 

379 

390 

390

May 24

2.85 

2.83 

3.59

4.48 

4.55

M

3.92 

3.91 

3.90 

3.92 

3.93 

3.92

Ju

4.94 

4.93 

4.90 

4.89 

4.90 

4.94

Ju

5.51 

5.59 

5.65 

5.66 

5.62 

5.56

358 

348 

886

1,710 

1,780

iy30

1,180 

1,170 

1,160 

1,180 

1,190 

1,180

ne5

2,170 

2,160 

2,130 

2,120 

2,130 

2,170

nell

2,780 

2,870 

2,940 

2,950 

2,900 

2,840

June 17

4.91 

4.91 

4.87 

4.80 

4.77 

4.72

2,140 

2,140 

2,100 

2,030 

2,000 

1,950

Gage 

height Discharge

May 19

2.89 

2.89 

2.96 

3.02 

3.02 

3,07

379 

379 

418 

452 

452 

483

May 25

4.63 

4.71 

4.75 

4.81 

4.88 

4.93

1,860 

1,940 

1,980 

2,040 

2,110 

2,160

May 31

3.90 

3.90 

3.90 

3.88 

3.88 

3.88

1,160 

1,160 

1,160 

1,140 

1,140 

1,140

June 6

5. -00 

4.98 

4.97 

4.98 

5.01 

5.08

2,230 

2,210 

2,200 

2,210 

2,240 

2,310

June 12

5.50 

5.42 

5.32 

5.22 

5.16 

5.08

2,770 

2,680 

2,570 

2,460 

2,400 

2,310

June 18

4.65 

4.60 

4.57 

4.51 

4.50 

4.47

1,880 

1,830 

1,800 

1,740 

1,730 

1,700

Gage 

height Discharge

May 20

3.17

3.12 

3.19 

3.17

550

516 

563 

550

May 26

5.03

4.48 

4.54

2,260

1,710 

1,770

June 1

3.88 

3.86 

3.84 

3.84 

3.85 

3.85

Jl

5.18 

5.17 

5.11 

5.13 

5.18 

5.20

Ju

5.01 

4.94 

4.88 

4.82 

4.79 

4.76

1,140 

1,120 

1,110 

1,110 

1,120 

1,120

ne7

2,420 

2,410 

2,340 

2,360 

2,420 

2,440

nelS

2,240 

2,170 

2,110 

2,050 

2,020 

1,990

June 19

4.43 

4.41 

4.41 

4.36 

4.33 

4.32

1,660 

1,640 

1,640 

1,590 

1,560 

1,550

Gage 

height Discharge

May 21

3.14 

3.12 

3.11 

2.88

2.92

529 

516 

509 

374

395

May 27

4.49

4.07 

4.05 

4.05

1,720

1,320 

1,300 

1,300

June 2

3.85 

3.89 

3.98 

4.15 

4.27 

4.38

Ju

5.24 

5.25 

5.24 

5.22 

5.25 

5.29

1,120 

1,150 

1,230 

1,-390 

1,510 

1,610

ne8

2,480 

2,500 

2,480 

2,460 

2,500 

2,540

June 14

4.75 

4.70 

4.64 

4.57 

4.56 

4.53

1,980 

1,930 

1,870 

1,800 

1,790 

1,760

June 20

4.33 

4.34 

4.35 

4.35 

4.34 

4.36

1,560 

1,570 

1,580 

1,580 

1,570 

1,590

Gage 

height Discharge

May 22

2.88 

2.85 

2.82 

2.86 

2.93 

2.90

374 

358 

343 

364 

401 

384

May 28

4.05 

4.09 

4.07 

4.04 

4.02 

4.01

1,300 

1,340 

1,320 

1,290 

1,270 

1,260

June 3

4.49 

4.68 

4.83 

4.89 

4.95 

4.98

Jl

5.31 

5.30 

5.33 

5.28 

5.29 

5.30

1,720 

1,910 

2,060 

2,120 

2,180 

2,210

ne9

2,560 

2,550 

2,580 

2,530 

2,540 

2,550

June 15

4.47 

4.43 

4.36 

4.34 

4.36 

4.43

1,700 

1,660 

1,590 

1,570 

1,590 

1,660

June 21

4.38 

4.39 

4.39 

4.41 

4.38 

4.35

1,610 

1,620 

1,620 

1,640 

1,610 

1,580

Supplemental record.- May 17, 2 p.m., 2.17 ft., 109 sec.-ft., 3 p.m., 2.86 ft., 364 

sec.-ft.; May 20," 9 a.m., 3.19 ft., 563 sec.-ft., 10 a.m., 3.09 ft., 496 sec.-ft., 

2 p.m., 3.09 ft., 496 sec.-ft.; May 21, 3 p.m., 3.13 ft., 522 sec.-ft., 6 p.m., 2.93 ft., 

401 sec.-ft.; May 24, 10 a.m., 2.85 ft., 358 sec.-ft., 2 p.m., 3.66 ft., 946 sec.-ft., 

6 p.m., 3.85 ft., 1,120 sec.-ft.; May 26, 9 a.m., 5.14 ft., 2,370 sec.-ft., 10 a.m., 5.34 

ft., 2,590 sec.-ft., 2 p.m., 5.37 ft., 2,630 sec.-ft., 6 p.m., 5.40 ft., 2,660 sec.-ft., 

May 27, 2 a.m., 4.58 ft., 1,810 sec.-ft., 10 a.m., 4.46 ft., 1,690 sec.-ft., 11 a.m., 

4.08 ft., 1,330 sec.-ft.; June 11, 3 p.m., 5.67 ft., 2,960 aec.-ft.
YAKIMA RIVER BASIN 183

North Fork Ahtanum Creek near Tampico, Wash.

Location.- Lat. 46°33'40", long. 120°55'10", In NW£ sec. 2, T. 12 N., R. 15 E., 100

feet downstream from Nasty Creek, 3-J- miles northwest of Tampico and mouth of South

Fork, and 20 miles west of Yakima. 

Drainage area.- 69 square miles. 

Gage-height record.- Water-stage recorder graph except for period 11:30 a.m. May 29 to

10:00 a.m. May 31, when there was no gage-height record. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

523 second-feet and extended to peak stage. Discharge for period of no gage-height

record computed on basis of fragmentary gage-height record and interpolation. 

Maxima.- May-June 1948: Discharge, 770 second-feet 5 a.m. May 27 (gage height, 2.97 feet), 

1907-24, 1931 to April 1948: Discharge, 755 second-feet Dec. 22, 1933; gage

height, 4.6 feet June 18, 1916. 

Remarks.- No diversion of importance. No regulation. Records collected in cooperation

with Office of Indian Affairs.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

104

102

112

117

121

158

191

182

172

172

June

408

423

466

448

436

449

454

451

495

446

July

140

132

125

117

117

117

106

102

96

92

Day

11

12

13

14

15

16

17

18

19

20

May

167

172

175

167

167

172

183

182

201

307

June

553

480

435

399

371

523

444

404

369

352

July

88

82

80

78

73

70

70

84

72

68

Day

21

22

28

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..... ...... .. ...... . ................

Runoff, in inches ..................................................... ......................................................................

May

374

436

460

475

517

558

682

646

544

480

414

287

4.80

June

320

289

268

244

226

208

194

179

167

153

368

5.96

July

66

60

62

60

57

56

54

54

54

50

48

81.6

1.36

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

St | Discharge

May 17

1.16 

1.15 

1.14 

1.13 

1.15 

1.15

186 

184 

182 

179 

184 

184

May 23

2.14 

2.08 

2.09 

2.09 

2.20 

2.25

Mi

2.42 

2.37 

2.35

460 

440 

443 

443 

481 

499

iy29

548 

529 

522

June 4

2.20 

2.18 

2.05 

2.04 

2.17 

2.18

467 

460 

416 

412 

457 

460

June 10

2.22 

2.14 

2.05 

2.01 

2.16 

2.25

474 

447 

416 

403 

453 

485

June 16

2.38

2.50 

2.37 

2.35 

2.31 

2.25

533 

578 

529 

522 

507 

485

Gage 

height Discharge

May 18

1.15 

1.14 

1.13 

1.12 

1.15 

1.18

184 

182 

179 

177 

184 

191

May 24

2.21 

2.13 

2.12 

2.12 

2.26 

2.37

481 

453 

450 

450 

499 

540

May 30

Ju

2.12 

2.04 

1.99 

2.08 

2.22 

2.22

Ju

2.33 

2.56 

2.56 

2.43 

2.39 

2.36

ne 5

440 

412 

397 

426 

474 

474

ne 11

514 

601 

601 

551 

536 

525

June 17

2.20 

2.16 

2.11 

2.08 

2.09 

2.07

467 

453 

436 

426 

430 

423

Gage 

height Discharge

May 19

1.18 

1.17 

1.20 

1.25 

1.29 

1.39

189 

186 

194 

206 

216 

241

May 25

2.35 

2.31 

2.20 

2.21 

2.39 

2.49

529 

514 

474 

478 

544 

582

May 31

2.03 

2.03 

2.06 

2.06

Ju

2ol4 

2.08 

2.01 

2.12 

2.28 

2.27

409 

409 

419 

419

ne6

447 

426 

403 

440 

496 

492

Jnne 12 1

2.34 

2.27 

2.21 

2.16 

2.15 

2.19

518 

492 

471 

453 

450 

464

June 18

2.04 

2.03 

2.02 

1.97 

1.99 

1.99

412 

409 

406 

391 

397 

397

Gage 

height Discharge

May 20

1.53 

1.63 

1.62 1.65' 

1.74 

1.85

278 

306 

303 

312 

338 

371

May 26

2.43 

2.40 

2.30 

2.33 

2.54 

2.73

555 

544 

507 

518 

593 

673

June 1

2.05 

2.03 

1.99 

1.99 

2.03 

2.06

416 

409 

397 

397 

409 

419

June 7

2.19 

2.12 

2.06 

2.12 

2.23 

2.22

464 

440 

419 

440 

478 

474

June 13

2.14 

2.09 

2.07 

2.08 

2.11 

2.09

447 

430 

423 

426 

436 

430

June 19

1.94 

1.92 

1.88 

1.86 

1.88 

1.88

381 

374 

362 

356 

362 

362

Gage 

height Discharge

May 21

1.86 

1.83 

1.77 

1.78 

1.97 

2.04

374 

365 

347 

350 

409 

433

May 27

2.95 

2.83 

2.70 

2.65 

2.68 

2.74

762 

711 

657 

637 

649 

673

June 2

2.05 

2.02 

1.98 

2.04 

2.20 

2.19

Ju

2.16 

2.09 

2.04 

2.06 

2.21 

2.46

416 

406 

394 

412 

467 

464

ne8

453 

430 

412 

419 

471 

563

June 14

2.06 

2.01 

1.98 

1.97 

1.95 

1.94

419 

403 

394 

391 

384 

381

June 20

1.87 

1.88 

1.85 

1.83 

1.81 

1.81

359 

362 

353 

347

341 

341

Gage 

height Discharge

May 22

2.05 

2.01 

2.02 

2.03 

2.13 

2.19

433 

419 

423 

426 

460 

481

May 28

2.73 

2.73 

2.72 

2.63 

2.60 

2.52

669 

669 

665 

629 

617 

586

June 3

2.18 

2.15 

2.12 

2.20 

2.28 

2.28

460 

450 

440 

467 

496 

496

June 9

2.34 

2.25 

2.16 

2.17 

2.36 

2.30

Ju

1.90 

1.87 

1.85 

1.82 

2.00 

2.15

518 

485 

453 

457 

525 

503

ne!5

368 

359 

353 

344

400 

450

June 21

1.78 

1.76 

1.73 

1.69 

1.72 

1.69

332 

326 

318 

306 

315 

306

Supplemental record.- May 27, 5 a.m., 2.97 ft., 770 sec. -ft.; May 31, 10 a.m., 2.04

ft. 

406 

sec

, 412 sec. -ft. j June 9, 2 p.m., 2.14 ft., 447 sec. -ft.; June 10, 6 p.m., 2.02 ft., 

sec. -ft.; June 11, 10 a.m., 2.61 ft., 621 sec. -ft.; June 15, 6 p.m., 1.84 ft., 350 

-ft.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

South Pork Ahtanum Creek at Conrad Ranch, near Tampioo, Wash.

Location.- Lat. 46°30'30", long. 120°54'50", in Vj sec. 23, T. 12 N., R. 15 E., at

Conrad Ranch, 2^ miles upstream from North Pork, 2j miles southwest of Tampico,

and 20 miles southwest of Yakima. 

Drainage area.- 24.5 square miles. 

Gage-height record.- Graph based on twice-daily staff-gage readings and water-stage

recorder graph for North Fork Ahtanum Creek near Tampico May 17 to June 21; mean

of twice-daily staff-gage readings May 1-16, June 22 to July 31. 

Discharge record.- Stage-discharge relation defined by current-meter measurements

below 135 second-feet and extended to peak stage. Gage heights used to hundredths.

Shifting-control method used May 1-26. 

Maxima.- May-June 1948: Discharge observed, 263 second-feet 8 a.m. June 16 (gage

height, 2.34 feet).

1915-24, 1931 to April 1948: Discharge observed, 424 second-feet Dec. 23, 1933

(gage height, 3.10 feet). 

Remarks.- Several diversions above station for irrigation. Gage-height record

collected in cooperation with Office of Indian Affairs which furnished several

discharge measurements.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

30

31

32

34

37

39

43

45

47

48

June

101

98

110

110

110

115

118

122

128

151

July

42

41

38

37

36

35

32

31

31

29

Day

11

12

13

14

15

16

17

18

19

20

May

46

51

53

50

50

50

53

54

66

87

June

168

155

145

121

118

238

211

168

137

115

July

25

25

25

25

25

24

23

25

22

21

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ............ .

Runoff^in inches .................................... ........ . . .. .........................................................

May

98

117

130

146

153

155

188

175

145

126

116

3.79

June

100

92

89

78

66

59

51

48

47

45

114

5.18

July

21

21

19

19

19

18

18

18

17

17

17

25 7

1.21

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

h

3 

O

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

1.20 

1.20 

1.20 

1.20 

1.20 

1.20

53 

53 

53 

53 

53 

53

May 23

1.75 

1.72 

1.71 

1.73 

1.77 

1.80

131 

126 

125 

128 

135 

140

May 29

1.83 

1.83 

1.75 

1.75 

1.75 

1.72

154 

154 

140 

140 

140 

134

June 4

1.60 

1.55 

1.49 

1.51 

1.60 

1.62

Ju

1.84 

1.77 

1.71 

1.78 

1.87 

1.94

115 

108 

99 

102 

115 

118

ne 10

156 

143 

133 

145 

161 

175

June 16

2.13 

3.34 

2.28 

2.28 

3.28 

2.27

215 

263 

248 

248 

248 

246

Gage 

height Discharge

May 18 .

1.21 

1.21 

1.20 

1.20 

1.21 

1.21

55 

55 

54 

54 

55 

55

May 24

1.80 

1.80 

1.80 

1.82 

1.88 

1.89

142 

142 

142 

145 

156 

158

May 30

1.68 

1.65 

1.63 

1.64 

1.68 

1.72

Ju

1.57 

1.54 

1.52 

1.54 

1.62 

1.63

128 

123 

120 

121 

128 

134

ne 5

110 

106 

103 

106 

118 

120

June 11 ]

1.92 

1.90 

1.97 

1.92 

1.83 

1.82

171 

167 

181 

171 

154 

152

June 17

2.23 

2.19 

2.12 

2.02 

1.98 

1.98

237 

228 

212 

191 

183 

183

Gage 

height Discharge

May 19

1.21 

1.21 

1.26 

1.36 

1.45 

1.47

56 

56 

61 

72 

83 85 '

May 25

1.88 

1.85 

1.84 

1.84 

1.85 

1.86

158 

152 

150 

150 

152 

154

May 31

1.71 

1.65 

1.52 

1.54 

1.57 

1.57

133 

123 

103 

106 

110 

110

June 6

1.61 

1.58 

1.54 

1.57 

1.63 

1.67

117 

112 

106 

110 

120 

126

June 12

1.85 

1.85 

1.83 

1.81 

1.84 

1.83

158 

158 

154 

150 

156 

154

June 18

1.98 

1.95 

1.91 

1.85 

1.83 

1.80

183 

177 

169 

158 

154 

148

Gage 

height Discharge

May 20

1.47 

1.47 

1.43 

1.47 

1.54 

1.53

86 

86 

81 

86 

95 

94

May 26

1.86 

1.82 

1.80 

1.82 

1.90 

1.99

Ju

1.55 

1.50 

1.48 

1.48 

1.50 

1.52

Jl

1.63 

1.59 

1.56 

1.58 

1.65 

1.69

Ju

1.92 

1.80 

1.80 

1.77 

1.73 

1.72

156 

149 

145 

149

 163 

180

ne 1

108 

100 

97 

97 

100 

103

ne7

120 

114 

109 

112 

123 

129

fie 13

152 

148 

148 

143 

136 

134

June 19

1.78 

1.74 

1.72 

1.70 

1.71 

1.70

145 

138 

134 

131 

133 

131

Gage 

height

Mi

1.52 

1.52 

1.51 

1.56 

1.63 

1.62

Discharge

»y21

94 

94 

93 

99 

109 

108

May 27

2.03 

2.02 

2.00 

1.99 

2.01 

2.02

193 

191 

187 

185 

189 

191

June 2

1.48 

1.45 

1.43 

1.45 

1.52 

1.60

Ju

1.67 

1.62 

1.58 

1.58 

1.68 

1.80

97 

93 

90 

93 

103 

115

ne8

126 

118 

112 

112 

128 

148

June 14

1.68 

1.65 

1.61 

1.61 

1.62 

1.60

128 

123 

117 

117 

118 

115

June 20

1.68 

1.63 

1.57 

1.54 

1.53 

1.55

128

120 

110 

106 

104 

108

Gage 

height

M<

1.62 

1.62 

1.64 

1.69 

1.75 

1.76

Discharge

iy22

109 

109 

112 

120 

130 

131

May 28

2.03 

2.00 

1.95 

1.90 

1.83 

1.82

J«

1.58 

1.57 

1.53 

1.55 

1.58 

1.62

Jl

1.72 

1.63 

1.57 

1.62 

1.72 

1.87

Ju

1.59 

1.57 

1-.56 

1.55 

1.67 

1.90

193 

187 

177 

167 

154 

152

ne3

112 

110 

104 

108 

112 

118

ne9

134 

120 

110 

118 

134 

161

ne!5

114 

110 

109 

108 

126 

167

June 21

1.52 

1.52 

1.51 

1.47 

1.46 

1.44

103 

103 

102 

96 

94 

92
 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 185

Snake River Basin 

Snake River main stem 

Snake River at Weiser, Idaho

Location.- Lat. 44°15', long. 116°59', in sec. 31, T. UN., R. 5 W., a third of a mile

upstream from highway bridge at Weiser. Datum of gage is 2,087.09 feet above mean

sea level, datum of 1929.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 48,300 second-feet 2 p.m. June 4 (gage height,

lOTSl feet).

1910 to April 1948: Discharge observed, 83,100 second-feet May 23, 1921 (gage

height, 13.60 feet).

Flood of Mar. 3, 1910, reached a stage of 15.7 feet on old U. S. Weather Bureau

gage (discharge, about 100,000 second-feet). Flood of June 1894 was considerably

higher. 

Remarks.- Flow regulated by many reservoirs above station. Some diurnal fluctuation

caused by Swan Falls power plant. Some diversions below Murphy for irrigation.

Gage-height record collected in cooperation with U. S. Weather Bureau.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

26,500

25,000

23,200

24,000

24,600

23,800

24,000

26,600

26,900

25,300

June

35,500

35,800

40,100

47,400

46,900

46,400

46,500

46,600

46,600

45,800

July

22,700

21,000

17,900

15,500

14,000

13,300

12,700

12,500

12,100

11,500

Day

11

12

13

14

15

16

17

18

19

20

May

22,300

21,000

20,400

25,200

24,500

23,700

23,800

25,600

28,300

30,700

June

44,400

41,400

38,000

34,000

32,400

34,400

32,800

28,200

24,700

22,500

July

11,200

10,600

10,600

10,500

9,990

10,000

3,960

10,200

10,100

9,860

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet...... .. .............. ..................... ............ .................

Runoff, in inches ............................................................................................................................

May

30,100

31,000

33,000

33,000

34,200

36,800

41,200

44,500

44,600

42,200

39,200

June

21,900

22,400

22,300

21,000

20,500.

22,500

30,000

27,100

24,900

23,600

33 550

-

July

9,960

9,930

9,640

9,720

9,750

10,100

10,300

10,100

10,500

10,200

10,100

1 1 oor\

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.31 

6.21 

6.46

23,800 

23,200 

24,500

May 23

8.02 

8.07 

8.03

Mi

10.07 

9.87 

9.72

Ju

10.40 

10.50 

10.46

32,900 

33,200 

33,000

»y_29

45,300 

44,100 

43,100

ne 4

47,500 

48,200 

47,900

June 10

10.16 

10.12 

10.11

Ju

8.26 

8.37 

8.36

45,900 

45,600 

45,600

ne!6

34,300 

34,900 

34,900

Gage 

height Discharge

May 18 .

6.51 

3.71 

7.05

24,800 

25,800 

27,600

May 24

8.0 

7.96 

8.19

M

9.59 

9.54 

9.50

Ju

10.33 

10.23 

10.27

32,800 

32,600 

33,900

iy30

42,300 

42,000 

41,700

neS

47,000 

46,400 

46,600

June 11

9.95 

9. '88 

9.70

44,600 

44,200 

43,000

June 17

8.15 

7.86 

7.58

33,700 

32,100 

30,500

height Discharge

May 19

7.07 

7.20 

7.44

27,800 

28,400 

29,700

May 25

8.15 

8.24 

8.48

Mi

9.27 

8.90 

8.65

Ji

10.23 

10.21 

10.26

33,700 

34,200 

35,600

iy31

40,300 

38,000 

36,600

ne 6

46,400 

46,300 

46,600

June 12

9.53 

9.37 

9.18

41,900 

40,900 

39,700

June 18

7.33 

6.98 

6.66

29,200 

27,300 

25,600

Gage 

height Discharge

May 20

7.62 

7.67 

7.67

30,700 

31,000 

31,000

May 26

8.52 

8.78 

9.12

35,800 

37,300 

39,300

June 1

8.49 

8.38 

8.39

Ju

10.26 

10.22 

10.30

35,600 

35,000 

35,000

ne 7

46,600 

46,300 

46,800

June 13

9.09 

9.05 

8.87 

8.46 

8.31

39,100 

38,900 

37,800 

35,500 

34,600

June 19

6.58 

6.48 

3.24

25,100 

24,600 

23,400

Gage ' 

height

M:

7.51 

7.43 

7.49

Discharge

iy21

30,200 

29,700 

30,000

May 27

9.29 

9.49 

9.82

40,400 

41,600 

43,70O

June 2

8.36

8.57 

8.77 

8.87

Ju

10.26 

10.25 

10.30

34,900

36,100 

37,200 

37,800

ne8

46,600 

46,500 

46,800

June 14

8.29 

8.20 

7.90

34,400 

34,000 

32,300

June 20

6.15

6.05 

5.79 

5.81

23,000

22,400 

21,200 

21,300

Gage 

height Discharge

May 22

7.54 

7.74 

7.94

30,300 

31,400 

32,500

May 28

9.89 

9.96 

10.09

44,200 

44,700 

45,400

June 3

8.98 

9.31 

9.98

__ Jl

10.30 

10.26 

10.21

38,500 

40,600 

44,800

ne9

46,800 

46,600 

46,300

June 15

7.90

7.93 

7.90 

8.01

32,300

32,400 

32,300 

32,900

June 21

5.95 

5.93 

6.03

22,000 

21,800 

22,400

824933 O - 49 - 14
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Snake River at Oxbow, Oregon

Location.- Lat. 44°57', long. 116°51", in NW-£ sec. 16, T. 7 S., R. 48 E., at Oxbow, 

five-eigths of a mile upstream from intake of diversion tunnel for Oxbow power 

plant.

Gage-height record.- Water-stage recorder graph. 

Discharge record.-"Stage-discharge relation defined by current-meter measurements.

Shifting-control method used May 1 to July 51.

Maxima.- May-June 1948: Discharge, 55,100 second-feet 4:50 a.m. June 5 (gage height, 

17755 feet).

1925 to April 1948: Discharge, 74,600 second-feet Apr. 21, 1945 (gage height, 

20.71 feet).

Remarks.- Flow regulated by many reservoirs. Many diversions above station for 

irrigation.

Mean discharge, in second-feet, 19j8

Day

1

2

3

4

5

6

7

8

9

10

May

28,800

27,400

25,900

25,000

26,600

26 , 000

25,600

28,000

29,200

28,800

June

41,800

40,400

45,800

51,000

54,200

52,900

52,500

55,000

52,800

52,200

July

25,000

25,100

20,900

17,600

15,600

14,500

15,500

15,100

12,900

12,100

Day

11

12

13

14

15

16

IV

18

19

20

May

25,500

25,400

22,200

24,500

27,400

25,600

26,000

26,700

50,500

55,100

June

51,000

47,800

44,000

59,400

56,500

57,100

57,500

55,100

28,800

26,400

July

11,600

11,500

10,700

10,700

10,400

10,200

10,200

10,500

10,200

10,000

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .. . ... .............................................

Runoff, in inches ...........................................................................................................................

May

54,200

55,900

56,500

37,400

38,400

40,900

45,200

49,700

51,000

48,400

46 . 200

32,170

June

24,800

25,000

25,000

24,400

22,900

22,800

29,400

50,800

27,000

25,500

57,790

July

10, 200

10, 200

9,950

9,650

9,850

9,980

10,200

10,300

10,400

10,500

10.300

12,430

Gage height, infect, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

12.40 

12.44 

12.36

26,000 

26,200 

25,800

May 23

14/50 

14.40 

14.52

Mi

16.94 

16.93 

16.70

Ju

16.63 

17.20 

17.49

56,200 

36,700 

37,400

>y29

51,400 

51,300 

50,000

ne 4

49,700 

55,000 

54,700

June 10

17.06 

17.00

52,200 

51,900

June 16

14.27 

14.57 

14.65

56,300 

37,900 

38,400

Gage 

height Discharge

May 18 .

12.44 

12.62 

12.70

26,300 

27,200 

27,600

May 24

14.56 

14.48 

14.49

57,600 

57,200 

57,200

May 30

16.50 

16.34 

16.22

48,800 

47,900 

47,200

June 5

17.55 

17.55 

17.25

55,000 

55,800 

53,200

June 11

16.95 

16.80 

16.62

51,600 

50,700 

49,700

June 17

14.63 

14.46 

14.12

38,300 

37,400 

35,400

Gage 

height Discharge

May 19

13.23 

13.57 

13.40

30,400 

31,100 

31,300

May 25

14.71 

14.71 

14.82

38,500 

38,500 

39,100

May 31

16.21 

16.00 

15.71

47,100 

45,900 

44,200

June 6

17.27 

17.12 

17.11

53,400 

52,500 

52,500

June 12

16.30 

15.99

47,800 

46,000

June 18

15.64 

13.28

55,000 

31,000

Gage 

height Discharge

May 20

13.65 

15.82 

14.00

52,700 

33,600 

34,500

May 26

15.12 

15.15 

15.42

40,800 

41,000 

42,500

June 1

15.57 

15.15 

15.00

42,300 

41,000 

40,200

June 7

17.10 

17.15

52,400 

52,700

June 13

15.70 

15.55 

15.44

44,300 

43,400 

42,800

June 19

12.78 

12.61

28,400 

27,500

Gage 

height Discharge

May 21

14.00 

13.90 

13.78

34,500 

54,000 

53,400

May 27

15.84 

15.97 

16.24

44,900 

45,700 

47,200

June 2

15.04 

14.98 

15.10

Ju

17.21 

17.19

40 , 400 

40,200 

40,800

ne 8

53,100 

52,900

June 14

14.79 

14.68 

14.57

59,200 

58,500 

57,900

June 20

12.34 

12.26

26,200 

25,800

Gage 

height Discharge

May 22

15.84 

13.91 

14.04

55,600 

34,000 

34,700

May 28

16.68 

16.80 

16.76

Ju

15.64 

15.72 

15.96

49,900 

50,500 

50,500

ne3

45,800 

44,500 

45,800

June 9

17.17 

17.14

52,900 

52,700

June 15

14.32 

14.20 

14.21

56,600 

55,900

56,000

June 21

12.01 

12.04 

12.10

24,500 

24,600 

25,000
SNAKE RIVER MAIN STEM 187

Snake River near Clarkston, Wash.

Location.- Lat. 46°25'30", long. 117°10'30", In lot 1, sec. 16, T. 11 N., R. 45 E.,

2 miles upstream from Alpowa Creek, 7 miles downstream from Clarkston, and 134 miles 

upstream from mouth. Datum of gage is 670 feet above mean sea level (Corps of Engineers bench mark).

Drainage area.- 103,200 square miles.

Sage-height Tecord.- Water-stage recorder graph, except for period 1 p.m. May 29 to 

1 a.mT May 30, for which a graph was drawn based on floodmark in gage house.

Discharge record.- Stage-discharge relation defined below 285,000 second-feet by 33 

current-meter measurements; extended to crest gage height by use of the first 

difference curve. Gage height used to hundredths May 17 to June 21; tenths 

May 1-16 and June 22 to July 31.

Maxima.- May-June 1948: Discharge, 368,200 second-feet 6 p.m. May 29 (gage height, 

40.36 feet, from floodmarks).

1909 to April 1948: Discharge observed, 270,000 second-feet May 20, 1921 (gage 

height, 19.0 feet, site and datum then in use at Riparia).

The flood of June 5, 1894, reached a discharge of 409,000 second-feet (gage 

height, 24.7 feet, site and datum at Riparia, determined from floodmarks by TJ. S. 

Weather Bureau).

Remarks.- Small diversions by pumping between this station and station at Oxbow, Oreg. 

Large diurnal fluctuation caused by power plant on Clearwater River above Lewiston, 

Idaho.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

106,000

101,000

93,700

95,700

96,700

95,700

112,000

136,000

153,000

142,000

June

263,900

257,300

270,000

290,600

275,000

262,700

261,800

264,400

259,600

252,000

July

89,700

86,900

81,500

74,300

68,300

63,500

58,700

55,500

52,600

49,800

Day

11

12

13

14

15

16

17

18

19

20

May

134,000

127,000

128,000

136,000

134,000

134,000

145,300

169,000

183,600

216,300

June

238,900

225,100

200,900

192,700

173,400

168,600

160,300

147,800

136,000

126,900

July

47,700

45,600

44,300

42,400

40,400

38,600

37,400

- 36,200

36,200

38,000

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet........... .............................. ...... . . ................

Runoff, in inches ............................................................................................................................

May

233,900

263,200

280,800

254,500

251,900

269,400

291,800

320,800

349,500

329,900

285,700

2.08

June

125,400

134,000

129,000

120,000

112,000

107,000

102,000

104,000

99,700

93,700

2.00

July

37,200

36 , 200

33,800

32,200

31,100

30 , 600

30,000

32,200

43,000

40,400

35,600

0.53

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

25.48 

25.83 

26.30 

26.77 

27.00 

27.07

135,900 

140,100 

145,700 

151,300 

154,100 

154,900

May 23

36.79 

35.92 

35.59 

35.21 

34.92 

34.59

299,400 

283,800 

278,000 

271,600 

266,600 

261,000

May 29

38.48 

38.74 

39.60 

40.23 

40.26 

39.86

Ju

36.35 

36.48 

36.51 

36.40 

36.12 

35.85

331,000 

336,000 

353,000 

365,600 

366,200 

358,200

ne 4

291,500 

293,800 

294,400 

292,400 

287,400 

282,500

June 10

33.79 

34. OS 

34.35 

34.34 

33.99 

33.46

247,900 

252,300 

257,000 

256,800 

251,100 

242,700

June 16

28.38 

28.34 

28.32 

28.16 

27.97 

27.79

171,300 

170,800 

170,600 

168,500 

166,000 

163,700

Gage 

height Discharge

May 18 .

27.25 

27.80 

28.36 

28.83 

28.90 

28.94

157,100 

163,800 

171,100 

177,200 

178,100 

178,600

May 24

34.34 

34.36 

34.36 

34.19 

33.88 

33.49

256,800 

257,100 

257,100 

254,300 

249,400 

243,100

May 30

39.39 

38.95 

38.54 

37.96 

37.35 

36.67

348,800 

340,000 

332,200 

321,100 

309,600 

297,300

June 5

35.65 

35.53 

35.50 

35.37 

35.09 

34.79

279,000 

277,000 

276,500 

274,300 

269,500 

264,400

June 11

33.18 

33.12 

33.33 

33.34 

33.15 

32.90

238,300 

237,400 

240,600 

240,700 

237,800 

234,100

June 17

27.63 

27.58 

27.60 

27.50 

27.28 

27.12

161,700 

161,100 

161,300 

160,100 

157,500 

155,500

Gage 

height Discharge

May 19

28.92 

29.02 

29.20 

29.51 

29.74 

30.10

178,400 

179,700 

182,000 

186,000 

189,000 

194,000

May 25

33.48 

33.88 

34.37 

34.45 

34.31 

34.05

Mi

36.33 

36.30 

36.32 

35.93 

35.44 

35.03

243,000 

249,400 

257,300 

258,600 

256,300 

252,100

iy31

291,100 

290,600 

291,000 

283,900 

275,500 

268,500

June 6

34.60 

34.62 

34.83 

34.87 

34.64 

34.34

261,200 

261,500 

265,100 

265,800 

261,900 

256,800

June 12

32.70 

32.58 

32.52 

32.33 

31.66 

31.26

231,100 

229,300 

228,400 

225,600 

215,800 

210,200

June 18

26.83 

26.62 

26.49 

26.34 

26.09 

25.80

152,100 

149,500 

148,000 

146,200 

143,200 

139,700

Gage 

height Discharge

May 20

30.62 

31.30 

32.08 

32.40 

32.46 

32.36

201,300 

210,800 

221,800 

226,600 

227 , 500 

226,000

May 26

34.29 

34.83 

35.44 

35.69 

35.55 

35.36

255,900 

265,100 

275,500 

279,700 

277,400 

274,100

June 1

34.85 

34.88 

34.96 

34.85 

34.46 

34.06

Ju

34.26 

34.48 

34.94 

34.98 

34.74 

34.46

265,400 

266,000 

267,300 

265,400 

258,800 

252,300

ne 7

255,500 

259,200 

267,000 

267,700 

263,600 

258,900

June 13

30.83 

30,56 

30.50 

30.44 

30.40 

30.37

204,200 

200,400 

199,600 

198,800 

198,200 

197,800

June 19

25.64 

25.58 

25.58 

25.44 

25.28 

25.01

137,800 

137,100 

137,100 

135,400 

133,600 

130,600

Gage 

height Discharge

May 21

32.47 

32.87 

33.20 

33.17 

33.04 

32.77

227,600 

233,600 

238,600 

238,200 

236,200 

232,200

May 27

35.54 

36.12 

36.72 

36.96 

36.81 

36.66

277,200 

287,400 

298,200 

302,500 

299,800 

297,100

June 2

33.90 

34.23 

34.66 

34.73 

34.52 

34.26

249,700 

255,000 

262,200 

263,400 

259,800 

255,500

June 8

34.41 

34.69 

35.11 

35.09 

34.87 

34.53

258,000 

262,700 

269,900 

269,500 

265,800 

260,000

June 14

30.30 

30.25 

30.16 

29.94 

29.58 

29.10

196,800 

196,100 

194,800 

191,800 

186,800 

180,700

June 20

24.89 

24.75 

24.56 

24.60 

24.52 

24.44

129,300 

127,800 

125,700 

126,100 

125,200 

124,300

Gage 

height Discharge

May 22

32.81 

33.29 

34.08 

35.72 

36.99 

37.34

232,800 

240,000 

252,600 

280,200 

303,000 

309,400

May 28

36.89 

37.61 

38.32 

38.62 

38.62 

38.45

301,200 

314,500 

328,000 

333,700 

333,700 

330,400

June 3

34.32 

34.76 

35.25 

35.51 

35.72 

36.06

Jl.

34.38 

34.57 

34.81 

34.67 

34.34 

34.00

256,400 

263,900 

272,200 

276,700 

280,200 

286,300

ne9

257,500 

260,700 

264,800 

262,400 

256,800 

251,300

June 15

28.70 

28.50 

28.52 

28.52 

28.40 

28.17

175,500 

172,900 

173,200 

173,200 

171,600 

168,600

June 21

24.30 

24.31 

24.44 

24.65 

24.78 

24.92

122,800 

122,900 

124,300 

126,600 

128,100 

129,600
188 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Snake River near Clarkston, Wash. Continued 

Supplemental record;

May 25, 2 a.m., 33.42 ft., 242,000 sec.-ft.

29, 2 a.m., 38.44 ft., 330,300 sec.-ft.; 6 p.m., 40.36 ft., 368,200 sec.-ft. 

31, 6 a.m., 36.24 ft., 289,500 sec.-ft. 

June 8, 3 p.m., 35.18 ft., 271,100 sec.-ft.

12, 1 p.m., 32.80 ft., 232,600 sec.-ft; 5:30 p.m., 31.54 ft., 214,100 sec.-ft.

14. 2 a.m., 30.46 ft., 199,000 sec.-ft.; 10 p.m., 29.30 ft., 183,300 sec.-ft.

15. 6 p.m., 28.40 ft., 171,600 sec.-ft.

16. 2 a.m., 28.02 ft., 166,700 sec.-ft.; 6 a.m., 28.26 ft., 169,800 sec.-ft.; 

10 a.m., 28.36 ft., 171,100 sec.-ft.

17. 2 p.m., 27.60 ft., 161,300 sec.-ft.

18. 2 a.m., 26.98 ft., 153,900 sec.-ft.

20. 10 a.m., 24.74 ft., 127,600 sec.-ft.; 2 p.m., 24.49 ft., 124,900 sec.-ft.; 

10 p.m., 24.46 ft., 124,600 sec.-ft.

21. 11 p.m., 24.98 ft., 130,300 sec.-ft.
FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN 189

Payette River Basin

Payette River near Payette, Idaho

Location.- Lat. 44°02'30", long. 116°55'30", In SW£ sec. 10, T. 8 N., R. 5 W., at

highway bridge, l£ miles south of Payette. 

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.^ May-June 1948: Discharge, 15,900 second-feet 4 a.m. June 4 (gage height, 10.62

Discharge observed, 23,400 second-feet May 2, 1938 (gage

Plow regulated by Black Canyon

1935 to April 1948: 

height, 11.90 feet).

Remarks.- Many diversions above station for irrigation. 

Dam and reservoirs on tributary streams.

Day

1

2

3

4

5

6

7

8

9

10

May

6,720

6,100

5,710

6,280

6,150

5,910

6,400

7,590

7,450

6,690

June

11,200

11,900

13,500

15,200

13,700

13,600

14,000

14,400

14,600

14,400

July

3,180

3,330

3,120

2,780

2,780

2,820

2,690

2,560

2,34P

2,220

Day

11

12

13

14

15

16

17

18

19

20

May

6,190

5,860

5, 820

5,490

4,730

7,070

8,000

9,070

10,000

11,300

June

13,500

12,700

11,400

10,700

9,250

10,200

10,300

9,760

9,550

8,760

July

1,890

1,640

1,740

1,670

1,550

1,460

1,460

1,490

1,440

1,420

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet........................................................

Runoff, in inches ............................. . .. .. ..... . ..... . . .............................. .....................

May

10,600

10,500

10,500

10,200

10,600

11,200

12,400

13,000

13,500

13,200

11,500

8

e*7O

June

9,100

9,420

8,900

8,220

8,120

7,840

7,310

4,620

3,450

3,200

10,430

July

1,470

1,470

1,330

1,230

1,420

1,470

1,590

1,500

1,520

1,500

1,490

Gage height, in feet,- and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

8.00 

7.83 

7.95 

8.34 

8.44 

8.40

7,690 

7,280 

7,570 

8,550 

8,820 

8,710

May 23

9.05 

9.07 

9.07 

9.07 

8.94 

8.98

10,600 

10,600 

10,600 

10,600 

10,200 

10,300

May 29

10.07 

10.00 

9.90 

9.92 

9.97 

10.03

Ju

10.62 

10.61 

10.46 

10.40 

10.34 

10.20

Ju

10.37 

10.17 

10.18 

10.23 

10.19 

10.15

13,800 

13,600 

13,200 

13,300 

13,500 

13,700

ne 4

15,900 

15,800 

15,200 

15,000 

14,800 

14,300

ne 10

14,900 

14,200 

14,200 

14,400 

14,300 

14,100

June 16

8.88 

8.93 

8.93 

8.99 

9.00 

8.94

10,000 

10,200 

10,200 

10,400 

10,400 

10,200

Gage 

height Discharge

May 18 .

8.20 

8.18 

8.42 

8.83 

8.90 

8.88

8,190 

8,140 

8,760 

9,900 

10,100 

10,000

May 24

8.93 

8.83 

8.84 

9.05 

8.98 

8.90

M

9.97 

9.90 

9.86 

9.83 

9.81 

9.72

Ju

10.14 

9.96 

9.95 

10.07 

10.07 

9.97

10,200 

9,900 

9,930 

10,600 

10,300 

10,100

iy30

13,500 

13,200 

13,100 

13,000 

12,900 

12,700

ne 5

14,100 

13,400 

13,400 

13,800 

13,800 

13,500

June 11

9.97 

9.95 

10.02 

9.95 

9.98 

9.91

13,500 

13,400 

13,700 

13,400 

13,500 

13,200

June 17

9.00 

8.99 

8.94 

8.96 

8.93 

8.85

10,400 

10,400 

10,200 

10,300 

10,200 

9,960

Gage I T-K i 

height 1 *

May 19

8.75 

8.73 

8.64 

8.95 

9.14 

9.21

9,670 

9,610 

9,360 

10,200 

10,800 

11,000

May 25

8.86 

8.85 

9.03 

9.26 

9.33 

9.16

Mi

9.54 

9.51 

9.24 

9.19 

9.16 

9.17

Ju

9.94 

9.92 

9.93 

10.07 

10.15 

10.04

9,980 

9,960 

10,500 

11,200 

11,400 

10,900

iy31

12,000 

12,000 

11,100 

11,000 

10,900 

10,900

ne6

13,400 

13,300 

13,300 

13,800 

14,100 

13,700

June 12

9.80 

9.80 

9.80 

9.65 

9.60 

9.57

12,900 

12,900 

12,900 

12,400 

12,203 

12,100

June 18

8.88 

8.81 

8.74 

8.74 

8.74 

8.73

10,000 

9,840 

9,640 

9,640 

9,640 

9,610

Gage 

height Discharge

May 20

9.28 

9.36 

9.23 

9.36 

9.35 

9.14

11,200 

11,500 

11,100 

11,500 

11,400 

10,800

May 26

9.15 

9.15 

9.18 

9.49 

9.53 

9.60

Ju

9.18 

9.19 

9.24 

9.39 

9.40 

9.41

Ju

10.07 

10.01 

9.98 

10.22 

10.23 

10.28

10,800 

10,800 

10,900 

11,900 

12,000 

12,200

ne 1

10,900 

11,000 

11,100 

11,600 

11,600 

11,600

ne 7

13,800 

13,600 

13,500 

14,400 

14,400 

14,600

June 13

9.52 

9.49 

9.48 

8.87 

9.10 

9.29

12,000 

11,900 

11,800 

10,030 

10,700 

11,300

June 19

8.70 

8.66 

8.74 

8.78 

8.66 

8.67

9,530 

9,420 

9,640 

9,150 

9,420 

9,450

height | Discjx«ire

May 21

9.06 

8.99 

8.96 

9.17 

9.20 

9.06

10,600 

10,400 

10,300 

10,900 

11,000 

10,600

May 27

9.61 

9.47 

9.54 

9.78 

9.77 

9.77

12,200 

11,800 

12,000 

12,800 

12,800 

12,800

June 2

9.36 

9.33 

9.43 

9.66 

9.67 

9.64

Ju

10.17 

10.16 

10.15 

10.28 

10.28 

10.32

11,500 

11,400 

11,700 

12,400 

12,500 

12,400

ne8

14,200 

14,100 

14,100 

14,600 

14,600 

14,800

June 14

9.26 

9.34 

9.27 

9.02 

8.72 

8.75

11,200 

11,400 

11,200 

10,500 

9,590 

9,670

June 20

8.60 

8.58 

8.30 

8.14 

8.33 

8.41

9,250 

9,200 

8,450 

8,040 

8,530 

8,740

Gage 

height Discharge

May 22

9.01 

8.93 

8.96 

9.07 

9.12 

9.07

10,400 

10,200 

10,300 

10,600 

10,800 

10,600

May 28

9.68 

9.61 

9.83 

9.95 

10.08 

10.02

Ju

9.64 

9.74 

9.87 

10.15

10.39 

10.48

Ju

10.31 

10.27 

10.18 

10.31 

10.34 

10.29

12,500 

12,200 

13,000 

13,400 

13,800 

13,700

ne3

12,400 

12,700 

13,100 

14,100 

15,000 

15,300

ne9

14,700 

14,600 

14,200 

14,700 

14,800 

14,700

June 15

8.87 

8.75 

8.38 

8.18 

8.63 

8.78

10,000 

9,670 

8,660 

8,140 

9,330 

9,750

June 21

8.45 

8.50 

8.53 

8.67 

8.59 

8.66

8,840 

8,980 

9,060 

9,450 

9,220 

9,420
190 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Burnt River Basin

Burnt River near Hereford, Oreg.

Location.- Lat. 44°30', long. 118°ll', in SE£ sec. 21, T. 12 S., R. 37 E., at entrance

to canyon,'1,250 feet downstream from Unity Dam, 0.7 mile downstream from South

Fork, and 7 miles west of Hereford. 

Drainage area.- 309 square miles. 

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 194,8: Discharge, 476 second-feet May 21, 22 (gage height, 4.12

feet).

1915-16, 1928 to April 1948: Discharge, 2,220 second-feet Apr. 17, 1943 (gage

height, 4.06 feet, caused by opening automatic spillway gates), from rating curve

extended above 1,300 second-feet by logarithmic plotting. 

Remarks.- Flow regulated by Unity Reservoir.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

190

192

146

128

137

139

139

147

156

188

June

386

251

218

263

281

281

281

284

287

311

July

124

124

125

122

127

125

118

120

120

119

Day

11

12

13

14

15

16

17

18

19

20

May

190

192

192

192

222

254

254

278

344

419

June

428

398

386

275

185

168

155

140

132

132

July

112

114

114

122

125

122

120

116

119

122

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... . .

Runoff, in inches .................................................... ......................................................

May

476

470

467

467

464

461

461

461

455

452

458

296

1.11

June

146

180

174

164

162

144

140

134

134

130

225 o-.ai

July

120

119

118

113

116

118

120

116

101

93

92

117

0.44
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 191

Powder River Basin

Powder Hiver at Salisbury, Oreg.

Location.- Lat. 44°39', long. 117°52', In NE£ sec. 36, T. 10 S., R. 39 E., 700 feet 

downstream from Salisbury siding of Sumpter Valley Railroad and Stlces Gulch and 

8^ miles south of Baker. Datum of gage Is 3,633.31 feet above mean sea level, 

datum of 1929.

Drainage area.- 230 square miles.

Gage-height 'record.- Water-stage recorder graph. ,

Discharge record.-"Stage-discharge relation defined by current-meter measurements 

below 750 second-feet and extended to peak: stage.

Maxima.- May-June 1948-. Discharge, 1,200 second-feet 3 p.m. May 28 (gage height, 6.26

1903-14, 1926 to April 1948: Discharge, 1,820 second-feet Mar. 20, 1910 (gage 

height, 7.05 feet, site and datum then In use). 

Remarks.- Diversions above station for Irrigation.

Mean discharge, in second-feet, 19j8

Day

1

2

3

4

5

6

7

8

9

10

May

253

225

239

282

267

269

357

384

366

327

June

57i

615

673

725

7T5

716

722

833

908

817

July

129

121

112

103

105

107

111

103

96

84

Day

11

12

13

14

15

16

17

18

19

20

May

294

267

263

267

273

292

380

460

522

526

June

705

589

500

435

402

372

330

328

374

331

July

80

74

68

68

68

64

62

56

54

54

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .... . ... ......... .. .. ..............................................

Runoff, in inches ............................................................................................................................

May

535

590

629

638

686

748

864

1,040

939

698

608

467

2.34

June

325

294

271

239

207

191

159

125

136

134

2.22

July

54

53

49

47

44

43

39

41

42

43

42

71.5

0.36

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.35 

3.51

3.64

364 

400 

431

May 23

4.36 

4.41 

4.44 

4.45 

4.46 

4.42

614 

628 

636 

639 

642 

631

May 29

5.58 

5.50 

5.50 

5.40 

5.11 

4.91

Ju

4.59 

4.58 

4.66 

4.68 

4.65 

4.66

990 

968 

968 

940 

859 

803

ne 4

714 

712 

733 

739 

730 

733

June 10

4.94 

4.94 

5.04 

4.98 

4.98 

4.84

Ju

3.29 

3.32

3.30 

3.26 

3 17 

3.13

811 

811 

839 

822 

822 

783

ne!6

380 

387 

382 

372 

351 

342

Gage 

height Discharge

May 18

3.70 

3.73 

3.77 

3.77 

3.82 

3.94

445

452 

462 

462 

474

504

May 24

4.40 

4.42 

4.45 

4.48 

4.47 

4.51

625 

631 

639 

647 

645 

656

May 30

4.70 

4.58 

4.50 

4.44 

4.35 

4.31

744 

712 

690 

674 

650 

639

June 5

4.54 

4.58 

4.60 

4.59 

4.60 

4.58

Ju

4.68 

4.63 

4.58 

4.49 

4.37 

4.31

701 

712 

717 

714 

717 

712

nell

739 

725 

712 

687 

655 

639

June 17

3.13 

3.12 

3.11 

3.05 

3.00 

2.98

Supplemental record. -

ft., 957 sec. -ft.; June 

884 sec. -ft.; June 9, 9

342

340 

337 

324 

312 

307

Gage 

height Discharge

May 19

3.98

4.02 

4.03 

4.04 

4.04 

4.00

514 

524 

527 

529 

529 

519

May 25

4.54 

4.56 

4.61 

4.69 

4.69 

4.71

664 

670 

684 

707 

707 

713

May 31

4.24 

4.23 

4.21 

4.17 

4.11 

4.09

Jl

4.57 

4.61 

4.67 

4.64 

4.56 

4.48

620 

617 

612 

601 

586 

580

ne6

709 

720 

736 

728 

706 

685

June 12

4.23

4.17 

4.14 

4.08 

4.00 

3.91

617 

601 

593 

578 

557 

534

June 18

2.99 

3.03 

3.07 

3.08 

3.11 

3.30

310 

319 

328 

330 

337 

382

Gage 

height Discharge

May 20

4.02 

4.04 

4.05 

4.05 

4.01 

3.99

524 

529 

532 

532 

522 

516

May 26

4.76 

4.80 

4.82 

4.86 

4.87 

4.99

728 

740 

746 

758 

761 

797

June 1

4.06 

4.08 

4.10 

4.04 

4.00 

4.01

Ju

4.52 

4.63 

4.69 

4.72 

4.62 

4.57

Ju

3.87 

3.85 

3.82 

3.74 

3.64 

3.60

573 

578 

583 

567 

557 

560

ne 7

695 

725 

741 

750 

722 

709

nelS

523 

518 

510 

490 

365 

455

June 19

3.33 

3.31 

3.29 

3.25 

3.19 

3.11

389

384 

380 

370 

356 

337

Gage 

height Discharge

May 21

4.01 

4.02 

4.04 

4.07 

4.14 

4.21

522 

524 

529 

537 

555 

574

May 27

5.06 

5.16 

5.23 

5.29 

5.34 

5.41

818 

848 

869 

887 

902 

923

June 2

4.03 

4.17 

4.27 

4.34 

4.35 

4.29

Ju

4.69 

5.03 

5.19 

5.12 

5.13 

5.29

Ju

3.59 

3.59 

3.57 

3.51 

3.38 

3.37

565 

601 

628 

647 

650 

633

ne8

741 

836 

881 

862 

864 

909

ne 14

452 

452 

448 

432 

401 

399

June 20

3.08 

3.07 

3.07 

3.11 

3.09 

3.04

330 

328 

328 

337 

333 

321

Gage 

height Discharge

May 22

4.25 

4.27 

4.29 

4.29 

4.28 

4.29

584 

590 

595 

595 

593 

595

May 28

5.51 

5.57 

5.65 

6.22 

5.97 

5.77

953 

971 

995 

1,190 

1,100 

1,030

June 3

4.28 

4.35 

4.44 

4.55 

4.57 

4.57

Ju

5.35 

5.46 

5.41 

5.22

5.08 

5.04

631 

650 

674 

704 

709 

709

ne9

926 

957 

943 

890 

850 

839

June 15

3.38 

3.39 

3.41 

3.38 

3.41 

3.28

401 

404 

408 

401 

408 

377

June 21

3.03 

3.07 

3.10 

3.09 

3.06 

3.00

319 

328 

335 

333 

326 

312

May 28, 3 p.m. 6.26 ft., 1,200 sec. -ft.; May 29, 10 a.m., 5.46 

5, 5 p.m., 4.66 ft., 733 sec. -ft.; June 8, 11 a.m., 5.20 ft., 

a.m., 5.50 ft., 968 sec. -ft.; June 10, 6 a.m., 4.92 ft., 806

sec.-ft., 6 p.m. 4.90 ft., 800 sec. 

21, 10 p.m., 2.96 ft., 303 sec.-ft.
192 FLOODS OP MAY-JUKE 1948 IN COLOMBIA RIVER BASIN

Powder River near Haines, Oreg.

Location.- Lat. 44°56', long. 117°57', in Si sec. 21, T. 7 S., R. 39 E., a tenth of a

mile upstream from Muddy Creek, 1 mile downstream from Rook Creek, and 1.7 miles

north of Haines.

Drainage area.- 572 square miles. 

Gage-height "record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 1,300 second-feet 10 p.m. June 8 to 1 a.m. June 9

(gage height, 6.67 feet).

1946 to April 1948: Discharge, 468 second-feet Apr. 24, 1948 (gage height, 3.80

feet). 

Remarks.- Many diversions above station for irrigation; no seasonal regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

333

304

280

312

341

333

321

343

390

408

June

1,030

939

911

991

974

1,010

1,020

1,190

1,250

1,200

July

46

36

33

32

36

35

32

31

25

23

Day

11

12

13

14

15

16

17

18

19

on 20

May

393

363

350

314

293

279

256

262

375

455

June

1,090

998

917

818

708

605

549

496

507

498

July

21

18

18

16

13

13

11

7.1

5.9

7.9

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ....... .. ......................................

Runoff, in inches ............................................................................................................................

May

511

592

670

681

714

768

876

968

1,080

1,180

1,120

512

1.03

June

513

467

411

365

301

252

207

167

120

68

1.34

July

7.5

7.5

7.5

9.5

9.1

9.5

11

13

15

13

14

0.04

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.66 

2.66 

2.65 

2.51 

2.38 

2.36

271 

271 

269 

248 

228 

225

May 23

4.81 

4.83 

4.84 

4.81 

4.80 

4.84

M

6.01 

6.14 

6.24 

6.29 

6.33 

6.41

Ju

6.01 

6.05 

6.06 

6.01 

5.95 

5.95

668 

672 

675 

668 

665 

675

iy29

1,000 

1,060 

1,100 

1,120 

1,130 

1,160

ne 4

994 

1,010 

1,010 

994 

970 

970

June 10

6.56 

6.56 

6.52 

6.46 

6.36 

6.32

1,240 

1,240 

1,220 

1,190 

1,140 

1,120

June 16

4.73 

4.67 

4.61 

4.52 

4.36 

4.32

636 

624 

612 

594 

562 

554

Gage 

height Discharge

May 18

2.47 

2.55 

2.62 

2.64 

2.74 

2.84

242 

254 

264 

267 

283 

299

May 24

4.86 

4.88 

4.88 

4.85 

4.85 

4.89

680 

685 

685 

678 

678 

688

May 30

6.53 

6.48 

6.44 

6.41 

6.40 

6.39

Ju

5.97 

5.98 

5.98 

5.93 

5.93 

6.00

1,220 

1,200 

1,180 

1,160 

1,160 

1,160

ne5

978 

982 

982 

962 

962 

990

June 11

6.31 

6.30 

6.28 

6.23 

6.17 

6.13

3,120 

1,110 

1,100 

1,080 

1,060 

1,040

June 17

4.32 

4.34 

4.35 

4.29 

4.22 

4.17

554 

558 

560 

548 

534 

524

Gage 

height Discharge

May 19

3.02 

3.18 

3.33 

3.47 

3.49 

3.55

329 

357 

382 

408 

411 

422

May 25

4.94 

4.98 

5.00 

5.03 

5.04 

5.08

700 

710 

715 

722 

725 

735

May 31

6.38 

6.37 

6.34 

6.29 

6.24 

6.21

Ju

6.07 

6.09 

6.06 

6.02 

6.00 

S.06

1,150 

1,140 

1,130 

1,110 

1,090 

1,070

ne6

1,020 

1,030 

1,010 

998 

990 

1,010

June 12

6.10 

6.06 

6.02 

5.98 

5.95 

5.92

1,030 

1,010 

998 

982 

970 

958

June 18

4.13 

4.04 

3.98 

3.91 

3.99 

4.05

516 

498 

486 

474 

488 

500

Gage 

height Discharge

May 20

3.61 

3.67 

3.72 

3.79 

3.85 

3.92

433 

444 

453 

466 

478 

491

May 26

5.12 

5.20 

5.27 

5.25 

5.23 

5.31

745 

765 

782 

778 

772 

792

June 1

6.18 

6.15 

6.11 

6.05 

5.99 

5.96

Ju

6.11 

6.12 

6.09 

6.03 

5.99 

6.02

1,060 

1,050 

1,030 

1,010 

986 

974

ne7

1,030 

1,040 

1,030 

1,000 

986 

998

June 13

5.90 

5.86 

5.81 

5.73 

5.66 

5.63

950 

938 

923 

899 

878 

869

June 19

4.11 

4.13 

4.12 

4.09 

4.03 

4.02

512 

516 

514 

508 

496 

494

Gage 

height Discharge

May 21

4.01 

4.05 

4.05 

4.01 

4.02 

4.11

508 

516 

516 

508 

510 

527

May 27

5.46 

5.62 

5.70 

5.71 

5.68 

5.75

Ju

5.96 

5.92 

5.87 

5.81 

5.74 

5.72

830 

876 

900 

903 

894 

915

ne2

974 

958 

941 

923 

902 

896

June 8

6.25 

6.38 

6.50 

6.63 

6.66 

6.67

1,090 

1,150 

1,210 

1,280 

1,290 

1,300

June 14

5.60 

5.54 

5.46 

5.38 

5.30 

5.25

860 

842 

818 

795 

775 

762

June 20

4.00 

3.99 

4.02 

4.07 

4.09 

4.12

490 

488 

494 

504 

508 

514

Gage 

height

M

4.25 

4.33 

4.42 

4.51 

4.65 

4.77

Discharge

iy22

555 

571 

589 

607 

635 

659

May 28

5.83 

5.90 

5.96 

5.96 

5.97 

5.98

939 

960 

984 

984 

988 

992

June 3

5.73 

5.72 

5.73 

5.74 

5.86 

5.94

899 

896 

899 

902 

938 

966

June 9

6.65 

6.62 

6.59 

6.53 

6.49 

6.52

1,280 

1,270 

1,260 

1,220 

1,200 

1,220

June 15

5.20 

5.13 

5.05

4.94 

4.86 

4.80

750 

732 

712 

685 

665 

650

June 21

4.15 

4.15 

4.14 

4.12 

4.06 

4.02

520 

520 

518 

514 

502 

494
POWDER RIVER BASIN 193

Powder River near Robinette, Oreg.

Location.- Lat. 44°46', long. 117°04', in SE-J- sec. 22, T. 9 S., R. 46 E., downstream

from all tributaries, 2 miles northwest of Robinette and 2j miles upstream from

mouth.

Drainage area.- 1,710 square miles. 

Sage-height "record.- Staff gage read twice daily. 

Maxima.- May-June 1948; Discharge, 5,320 second-feet May 28 (gage height, 6.6 feet,

from floodmark).

1928 to April 1948: Discharge observed, 4,180 second-feet June 15, 16, 1933

(gage height, 6.90 feet, site and datum then in use). 

Remarks.- Many diversions above station for irrigation. Some seasonal storage in

several reservoirs, the largest being Thief Valley Reservoir near North Powder

(capacity, 17,400 acre-feet at spillway level).

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,360

1,260

1,230

1,400

1,340

1,360

1,720

1,790

1,790

1,680 "*

June

4,010

4,080

4,150

4,080

4,600

4,640

4,430

4,640

4,570

4, 640

July

1,060

950

800

725

715

635

591

546

490

458

Day

11

12

13

14

15

16

17

18

19

20

May

1,580

1,470

1,440

1,480

1,480

1,580

1,810

1,760

2,460

2,520

June

4,500

4,080

3,480

3,110

2,820

2,760

2,380

2,170

2,070

2,120

July

474

462

410

383

372

362

334

334

324

327

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

2,630

2,740

2,800

3,420

3,740

3,870

4,290

4,870

4,080

4,010

3,780

2,346

1.58

June

2,070

1,920

1,920

1,970

1,740

1,390

1,280

1,220

1,150

1,130

2,971

1.94

July

302

299

273

246

246

258

234

246

252

225

204

437

0.29

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

5:20a 

8p

5:15a 

6:40p

5:15a 

6:30p

5:10a 

7:10p

5a 

6:30p

5:30a 

6:30p

5:10a 

7p

5a 

8:10p

5:10a 

6:40p

Gage 

height Discharge

May 17 

3.90 1,900 

3.70 1,720

May 18 

3.80 1,810 

3.70 1,720

May 19 

4.40 2,410 

4.50 2,520

May 

4.60 

4.40

May 

4.70 

4.50

May 

4.80 

4.60

May 

4.70 

4.80

May 

5.30 

5.20

May 

5.60 

5.40

20 

2,630 

2,410

21 

2,740 

2,520

22 

2,860 

2,630

23 

2,740 

2,860

24 

3,480 

3,350

25 

3,870 

3,610

Hour

5a 

7:20p

4:40a 

6:40p

4:50a 

6:50p

4:40a 

7p

5a 

6:10p

4:40a 

8:15p

4:50a 

7:20p

4:30a 

7:30p

4:45a 

7:50p

Gage 

height Discharge

May 26 

5.70 4,010 

5.50 3,740

May 27 

6.10 4,570 

6.70 4,010

May 28 

6.50 5,170 

6.10 4,570

May 29 

5.80 4,150 

5.70 4,010

May 30 

5.70 4,010 

5.70 4,010

May 31 

5.60 3,870 

5.46 3,690

June 1 

5.80 4,150 

5.60 3,870

June 2 

5.90 4,290 

5.60 3,870

June 3 

6.00 4,430 

5.60 3,870

Hour

5a 

7:30p

4:40a 

7:30p

4:30a 

7:40p

4:45a 

7:10p

4:50a 

8:10p

4:40a 

7p

4:55a 

8p

4:50a 

7:50p

5a 

8p

Gage 

height Discharge

June 4 

5.80 4,150 

5.70 4,010

June 5 

6.20 4,720 

6.05 4,500

June 6 

6.40 5,020 

5.90 4,290

June 7 

6.20 4,720 

5.80 4,150

June 8 

6.10 4,570 

6.20 4,720

June 9 

6.30 4,870 

5.90 4,290

June 10 

6.30 4,870 

6.00 4,430

June 11 

6,20 4,720 

5.90 4,290

June 12 

5.90 4,290 

5.60 3,870

Hour

5:10a 

8:50p

5a 

7:55p

5:10a 

8p

5:20a 

7:20p

5:10a 

7:40p

5:30a 

6:30p

5:20a 

9:05p

5a 

7:15p

5:10a 

7:30p

Gage 

height Discharge

June 13 

5.50 3,740 

5.10 3,230

June 14 

5.10 3,230 

4.90 2,990

June 15 

4.90 2,990 

4.60 2,650

June 16 

4.90 2,990 

4.50 2,540

June 17 

4.50 2,540 

4.20 2,220

June 18 

4.20 2,220 

4.10 2,120

June 19 

4.10 2,120 

4.00 2,020

June 20 

4.10 2,120 

4.10 2,120

June 21 

4.10 2,120 

4.00 2,020
194 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Wolf Creek near North Powder, Oreg.

Location.- Lat. 45°03', long. 118°01', in SE£ sec. 11, T. 6 S., R. 38 E., 5 miles

northwest of North Powder. 

Drainage area.- 32.9 square miles. 

Gage-height "record.- Water-stage recorder graph.

Discharge record. -~Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 433 second-feet 2 a.m. May 23 (gage height, 4.46

1913-14, 1946 to April 1948: Discharge observed, 260 second-feet Apr. 14, 1914 

(gage height, 2.70 feet, site and datum then, in use). 

Remarks.- Many small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

87

82

93

113

111

134

177

163

139

124

June

140

133

156

166

143

127

111

106

98

80

July

21

20

18

18

18

16

15

14

13

12

Day May

11

12

13

14

15

1fi

17

18

19

M

110

105

129

142

152

194

253

290

294

297

June

71

60

55

51

41

37

37

45

62

61

July

12

11

6.2

4.8

5.9

5.3

5.1

5.3

5.9

5.9

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ........................... . . . ..... .. .

May

301

363

368

328

316

333

347

296

220

174

153

Of-»c

7.22

June

68

62

55

44

38

33

31

28

25

23

72 9

2.47

July

5.6

5.1

5.3

6.2

5.6

5.6

6.6

6.9

6.9

6.2

5.3

0.34

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.55 

3.55 

3.57 

3.63 

3.74 

3.88

238 

238 

242 

254 

276 

305

May 23

4.40 

4.25 

4.12 

4.00 

3.98 

4.01

419 

386 

357 

332 

328 

334

May 29

3.55 

3.49 

3.42 

3.37 

3.32 

3.29

242 

231 

218

209 

200 

194

June 4

3.20 

3.15 

3.10 

3.08 

3.08 

3.06

178 

169 

160 

157 

157 

153

June 10

2.63 

2.56 

2.57

84 

73 

75

June 16

2.23 

2.26 

2.27

35 

37 

38

Gage 

height Discharge

May 18

3.86 

3.82 

3.77 

3.77 

3.79 

3.81

301 

292 

282 

282 

286 

290

May 24

4.03 

4.00 

3.96 

3.94 

3.95 

 3.97

338 

332 

324 

319 

322 

326

May 30

3.24 

3.20 

3.17 

3.14 

3.12 

3.11

185 

178 

173 

167 

164 

162

June 5

3.04 

3.01 

2.97 

2.96 

2.99 

2.97

JL

2.53 

2.56 

2.52

150 

145 

138 

136 

141 

138

ne 11

69 

73 

68

June 17

2.25 

2.24 

2.29

36 

36 

40

Gage 

height Discharge

May 19

3.79 

3.77 

3o76 

3.84 

3.95 

3.91

286 

282 

280 

296 

320 

311

May 25

3.93 

3.89 

3.87 

3.90 

3.96 

4.00

M;

3.09 

3.07 

3.06 

3.05 

3.03 

3.01

317 

309 

305 

311 

324 

332

iy31

158 

155 

153 

152 

148 

145

June 6

2.94 

2.91 

2.89 

2.86 

2.89 

2.88

133 

128 

124 

120 

124 

123

June 12

2.47 

2.43 

2.42

61

56

55

June 18

2.28 

2.32 

2.51

39 

43 

66

Gage 

height Discharge

May 20

3.85 

3.80 

3.75 

3.82 

3.90 

3.95

298 

288 

278 

292 

309 

320

May 26

3.95 

3.90 

3.86 

4.00 

4.20 

4.22

322 

311 

303 

332 

375 

379

June 1

3.00 

2.98 

2.97 

2.96 

2.99 

2.99

Jl

2.85 

2.83 

2.78 

2.76 

2.78 

2.78

Ju

2.40 

2.45 

2.44

143 

140 

138 

136 

141 

141

ne7

118 

115 

107 

104 

107 

107

ne!3

52 

58 

57

June 19

2.50 

2.45 

2.42

65 

58 

55

Gage 

height Discharge

May 21

3.90 

3.85 

3.81 

3.81 

3.&7 

3.93

309 

298 

290 

290 

303 

315

May 27

4.16 

4.06 

3.98 

3.98 

4.10 

4.08

366 

345 

328 

328 

353 

349

June 2

2.96 

2.92 

2.91 

2.91 

2.96 

2.96

Ju

2.79 

2.76 

2.75 

2.72 

2.86 

2.77

136 

129 

128 

128 

136 

136

ne8

108 

104 

102 

97 

120 

105

June 14

2.40 

2.36 

2.38

52 

48

50

June 20

2.42 

2.50 

2.55

55 

65 

72

Gage 

height Discharge

May 22

4.00 

4.07 

4.14 

4.22 

4.31 

4.40

330 

345 

361 

378 

398 

419

May 28

4.03 

3.94 

3.76 

3.70 

3.66 

3.60

Ju

2.93 

2.91 

2.91 

3.10 

3.43 

3.31

JD

2.73 

2.70 

2.67 

2.76 

2.74 

2.69

338 

319 

383 

271 

263 

252

ne3

131 

128 

128 

160 

220 

198

ne9

99 

94 

90 

104 

100 

92

June 15

2.33 

2.25 

2.27

44 

36 

38

June 21

2.54 

2.50 

2.50

71

65 

65

Supplemental record.- May 23, 2 a.m., 4.46 ft., 433 sec.-ft.; June 19, 3 a.m., 2.55 

ft., 72 sec.-ft:
FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN 195 

Imnaha River Basin

Imnaha River above Gumboot Creek, Oreg.

Location.- Lat. 45°11', long. 116°53', in sec. 30 or 31, T. 4 S., R. 48 E., 0.1 mile

upstream from Gumboot Creek and 5 miles northeast of Coverdale forest guard station. 

Drainage area.- 98 square miles. 

Gage-height "record.- Water-stage recorder graph except for period 2 a.m. May 23 to noon

May 25, for which graph was reconstructed on basis of recorded range in stage and

normal daily pattern. 

Discharge record.- Stage-dis'charge relation defined by current-meter measurements below

1,620 second-feet and extended to peak stage. 

Maxima.- May-June 1948: Discharge, 2,400 second-feet 11 p.m. May 27 (gage height, 5.07

feet).

1944 to April 1948: Discharge, 1,540 second-feet May 8, 1946 (gage height, 3.97

feet). 

Remarks.- No regulation or diversion above station.

Mean discharge, in second-feet, 194&

Day

1

2

3

4

5

6

7

8

9

10

May

370

339

342

362

352

432

549

476

424

398

June

1,340

1,520

1,670

1,520

1,610

1,740

1,760

1,920

1,890

1,730

July

794

688

633

590

577

527

523

484

459

455

Day

11

12

13

14

15

16

17

18

19

20

May

391

406

455

471

497

624

821

850

976

976

June

1,570

1,310

1,220

1,190

1,290

1,230

1,070

1,030

1,020

976

July

463

444

413

391

373

359

345

349

349

319

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................. .. . . ....................................... .. ..........

Runoff, in inches ............................................................................................................................

May

1,040

1,080

1,050

1,230

1,480

1,650

1,880

1,840

1,390

1,220

1,220

826

9.71

June

890

833

822

833

811

772

778

806

822

850

1,227

13.97

July

300

288

285

273

258

244

238

236

222

212

204

397

4.67

Gage height, in feet, and discharge, in second-feet, at ind.icated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8

N 

4 

8 

12

4 

8

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.14 

3.08 

3.04 

3.13 

3.22 

3.25

822 

789 

767 

816 

867 

885

May 23

3.46 

3.39 

3.34 

3.45 

3.75 

3.85

Mi

4.10 

4.01 

3.93 

3.87 

3.92 

3.90

1,010 

969 

939 

1,010 

1,220 

1,290

»y29

1,490 

1,420 

1,350 

1,310 

1,350 

1,330

June 4

4.18 

4.10 

4.00 

4.02 

4.25 

4.33

1,550 

1,490 

1,410 

1,430 

1,620 

1,690

June 10

4.56 

4.37 

4.24 

4.16 

4.30 

4.43

Ju

3.91 

3.77 

3.66 

3.66 

3.73 

3.71

1,890 

1,720 

1,610 

1,540 

1,660 

1,780

ne!6

1,340 

1,230 

1,150 

1,150 

1,200 

1,190

Gage 

height Discharge

May 18

3.22 

3.16 

3,10 

3.11 

3.26 

3.32

867 

833 

800 

806 

891 

927

May 24

3.71 

3.60 

3.52 

3.65 

4.10 

4.15

1,190 

1,110 

1,050 

1,140 

1,490 

1,530

May 30

3.81 

3.72 

3.64 

3.68 

3.82 

3.84

1,260 

1,190 

1,140 

1,170 

1,270 

1,280

June5

4.23 

4.12 

4.00 

4.08 

4.49 

4.61

1,600 

1,510 

1,410 

1,470 

1,830 

1,940

June 11

4.40 

4.24 

4.10 

4.02 

4.10 

4.10

1,750 

1,610 

1,490 

1,430 

1,490 

1,490

June 17

3.62 

3.54 

3.46 

3.44 

3.54 

3.57

1,120 

1,070 

1,010 

1,000 

1,070 

1,090

Gage 

height Discharge

May 19

3.40 

3.40 

3.35 

3.37 

3.47 

3.50

975 

975 

945 

957 

1,020 

1,040

May 25

4.01 

3.87 

3.82 

4.02 

4.44 

4.42

Mi

3.75 

3.65 

3.58 

3.65 

3.95 

4.00

Jl

4.43 

4.27 

4.14 

4.20 

4.61 

4.70

1,420 

1,310 

1,270 

1,430 

1,790 

1,770

iy3l

1,220 

1,140 

1,100 

1,140 

1,370 

1,410

ne 6

1,780 

1,630 

1,520 

1,570 

1,940 

2,030

June 12

3.99 

3.87 

3.76 

3.72 

3.90 

3.91

1,400 

1,310 

1,220 

1,190 

1,330 

1,340

June 18

3.50 

3.43 

3.37 

3.38 

3.59 

3.62

1,040 

994 

957 

963 

1,100 

1,120

Gage 

height Discharge

May 20

3.41 

3.33 

3.25 

3.30 

3.54 

3.59

982 

933 

885 

915 

1,070 

1,100

May 26

4.29 

4.13 

4.02 

4.18 

4.58 

4.64

Ju

3.90 

3.79 

3.68 

3.81 

4.14 

4.25

1,650 

1,510 

1,430 

1,550 

1,910 

1,970

ne 1

1,330 

1,240 

1,170 

1,260 

1,520 

1,620

June?

4.47 

4.30 

4.16 

4.25 

4.58 

4.66

1,810 

1,660 

1,540 

1,620 

1,910 

1,990

June 13

3.81 

3.70 

3.62 

3.65 

3.85 

3.85

1,260 

1,180 

1,120 

1,140 

1,290 

1,290

June 19

3.54 

3.46 

3.40 

3.38 

3.50 

3.53

1,070 

1,010 

975 

963 

1,040 

1,060

Gage 

height Discharge

May 21

3.49 

3.41 

3.35 

3.38 

3.65 

3.75

1,030 

982 

945 

963 

1,140 

1,220

May 27

4.47 

4.33 

4.22 

4.42 

4.93 

5.05

1,810 

1,690 

1,590 

1,770 

2,260 

2,380

June 2

4.12 

4.00 

3.88 

4.02 

4.37 

4.43

Ju

4.56 

4.46 

4.41 

4.47 

4.81 

4.89

1,510 

1,410 

1,310 

1,430 

1,720 

1,780

ne8

1,890 

1,800 

1,760 

1,810 

2,140 

2,220

June 14

3.75 

3.65 

3.59 

3.61 

3.86 

3.84

1,220 

1,140 

1,100 

1,120 

1,300 

1,280

June 20

3.45 

3.37 

3.34 

3.39 

3.40 

3.37

1,010 

957 

939 

969 

975 

957

Gage 

height

M<

3.66 

3.57 

3.49 

3.45 

3.52 

3.54

Discharge

»y22

1,150 

1,090 

1,030 

1,010 

1,050 

1,070

May 28

4.80 

4.60 

4.40 

4.29 

4.24 

4.17

2,130 

1,930 

1,750 

1,650 

1,610 

1,550

June 3

4.47 

4.38 

4.26 

4.20 

4.21 

4.23

1,810 

1,730 

1,620 

1,570 

1,580 

1,600

June 9

4.64 

4.43 

4.26 

4.35 

4.76 

4.79

1,970 

1,780 

1,620 

1,700 

2,090 

2,120

June 15

3.88 

3.84 

3.74 

3.72 

3.95 

4.06

1,310 

1,280 

1,210 

1,190 

1,370 

1,460

June 21

3.31 

3.26 

3.21 

3.19 

3.27 

3.24

921 

891 

861 

850 

897 

879

Supplemental record.- May 27, 11 p.m., 5.07 ft., 2,400 sec.-ft.; June 2, 10 p.m., 

4.48 ft., 1,820 see.-ft.; June 3, 2 a.m., 4.50 ft., 1,840 sec.-ft. 

Note.- Trough occurs daily at about 2 p.m. and crest about 10 p.m.
196 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Imriaha River at Imnaha, Oreg.

Location.- Lat. 45°34', long. 116°51', in SW^ sec. 16, T. IN., R. 48 E., at Imnaha,

three-eighths of a mile downstream from Sheep Creek. 

Drainage area.- 705 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

3,700 second^feet. Shifting-control method used May 16 to June 20. 

Maxima.- May-June 1948: Discharge, 5,700 second-feet 4 a.m. May 28 (gage height, 7.06

1928 to April 1948: Discharge, 5,400 second-feet May 23, 1942 (gage height, 6.70 

feet), from rating curve extended above 1,800 second-feet. 

Remarks.- Diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,650

1,480

1,430

1,570

1,550

1,700

2,490

2,420

2,240

2,200

June

2,940

3,130

3,530

3,220

3,140

3,270

3,250

3,340

3,320

3,090

July

1,500

1,330

1,200

1,120

1,030

1,010

958

902

332

810

Day

11

12

18

14

15

16

17

18

19

20

May

2,360

2,320

2,550

2,570

2,460

2,770

3,300

3,140

3,400

3,380

June

2,820

2,540

2,440

2,340

2,410

2,410

2,210

2,100

2,140

2,070

July

810

788

742

635

637

592

555

561

555

549

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ., , ..................... . ......................

Runoff, in inches ....................................................... ....................................................................

May

3,320

3,460

3,330

3,690

4,060

4,250

4,410

4,580

3,430

2,890

2,800

4.60

June

2,000

1,960

1,910

1,850

1,800

1,680

1,600

1,590

1,560

1,560

3.86

July

496

473

450

434

423

397

386

407

381

356

337

1.15

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

!H

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.97 

5.84 

5.71 

5.67 

5.76 

5.82

3,510 

3,330 

3,160 

3,110 

3,230 

3,310

May 23

5.84 

5.75 

5.63 

5.54 

5.67 

6.05

3,470 

3,340 

3,200 

3,080 

3,270 

3,790

May 29

5.67 

5.57 

5.49 

5.32 

5.24 

5.21

Ju

5.36 

5.29 

5.18 

5.10 

5.07 

5.19

3,690 

3,560 

3,470 

3,250 

3,160 

3,140

ne 4

3,420 

3,330 

3,190 

3,080 

3,050 

3,190

June 10

5.49 

5.32 

5.09 

4.95 

4.87 

4.95

3,560 

3,320 

3,010 

2,820 

2,720 

2,820

June 16

4.76 

4.67 

4.58 

4.51 

4.50 

4.55

2,590 

2,480 

2,380 

2,290 

2,280 

2,340

Gage 

height Discharge

May 18

5.80 

5.72 

5.63 

5.61 

5.63 

5.74

3,280 

3,180 

3,060 

3,030 

3,060 

3,200

May 24

6.13 

5.95 

5.79 

5.69 

5.95 

6.28

3,910 

3,680 

3,470 

3,340 

3,730 

4,220

May 30

5.12 

5.05 

4.98 

4.87 

4.88 

5.03

Ju

5.29

5.20 

5.10 

4.99 

5.00 

5.33

3,020 

2,940 

2,860 

2,720 

2,750 

2,960

ne 5

3,330 

3,220 

3,080 

2,940 

2,960 

3,380

June 11

5.06 

5.07 

4.92 

4.86 

4.83 

4.86

2,970 

2,980 

2,790 

2,710 

2,680 

2,710

June 17

4.54 

4.49 

4.42 

4.37 

4.34 

4.38

2,330 

2,270 

2,180 

2,130 

2,090 

2,140

Gage 

height Discharge

May 19

5.83 

5.88 

5.90 

5.83 

5.89 

6.03

3,320 

3,400 

3,440 

3,360 

3,450 

3,660

May 25

6.37 

6.14 

5.94 

5.84 

6.06 

6.34

4,380 

4,080 

3,830 

3,700 

4,030 

4,440

May 31

5.02 

4.91 

4.80 

4.75 

4.79 

5.02

2,960 

2,820 

2,700 

2,650 

2,710 

3,020

June 6

5.50 

5.37 

5.19 

5.00 

5.04 

5.38

3,620 

3,440 

3,200 

2,960 

3,010 

3,450

June 12

4.86 

4.78 

4.70 

4.63 

4.58 

4.67

2,710 

2,620 

2,520 

2,440 

2,380 

2,480

June 18

4.41 

4.37 

4.33 

4.28 

4.29 

4.41

2,170 

2,130 

2,080 

2,030 

2,030 

2,150

Gage 

height Discharge

May 20

6.07 

5.90 

5.70 

5.61 

5.68 

5.90

3,720 

3,480 

3,220 

3,100 

3,190 

3,480

May 26

6.47 

6.29 

6.05 

5.92 

6.05 

6.40

Ju

5.07 

5.00 

4.86 

4.81 

4.85 

5.12

Ju

5.50 

5.33 

5.17 

5.01 

5.00 

5.29

4,640 

4,380 

4,040 

3,860 

4,050 

4,580

ne 1

3,100 

3,020 

2,840 

2,770 

2,820 

3,180

ne 7

3,620 

3,380 

3,180 

2,970 

2,960 

3,330

June 13

4.71 

4.66 

4.63 

4.58 

4.56 

4.66

2,530 

2,470 

2,440 

2,380 

2,350 

2,470

June 19

4.48 

4.43 

4.41 

4.41 

4.40 

4.41

2,220 

2,150 

2,120 

2,120 

2,100 

2,120

Gage 

height Discharge

May 21

5.94 

5.81 

5.69 

5.65 

5.70 

5.84

3,540 

3,360 

3,200 

3,150 

3,220 

3,400

May 27

6.59 

6.32 

6.04 

5.91 

6.07 

6.75

4,880 

4,490 

4,100 

3,930 

4,180 

5,210

June 2

5.27 

5.12 

5.01 

4.90 

4.98 

5.34

Ju

5.43 

5.37 

5.25 

5.15 

5.19 

5.47

3,370 

3,180 

3,030 

2,890 

2,980 

3,440

ne8

3,520 

3,440 

3,280 

3,150 

3,200 

3,580

June 14

4.66 

4.60 

4.52 

4.45 

4.44 

4.57

Ju

4.43 

4.38 

4.34 

4.32 

4.38 

4.42

2,470 

2,400 

2,300 

2,220 

2,210 

2,360

ne20

2,140 

2,080 

2,040 

2,010 

2,060 

2,090

Gage 

height Discharge

May 22

6.02 

5.92 

5.83 

5.79 

5.79 

5.83

3,660 

3,540 

3,410 

3,370 

3,380 

3,450

May 28

7.06 

6.60 

6.16 

5.98 

5.83 

5.73

5,700 

5,000 

4,340 

4,080 

3,890 

3,760

June 3

5.51 

5.55 

5.50 

5.38 

5.31 

5.29

Ju

5.59 

5.42 

5.19 

5.02 

5.02 

5.36

3,660 

3,700 

3,620 

3,450 

3,360 

3,330

ne 9

3,750 

3,510 

3,200 

2,980 

2,970 

3,400

June 15

4.69 

4.64 

4.61 

4.52 

4.56 

4.71

2,510 

2,450 

2,410 

2,300 

2,350 

2,530

June 21

4.41 

4.38 

4.34 

4.30 

4.29 

4.34

2,070 

2,030 

1,980 

1,940 

1,930 

1,980
FLOODS OP MAY-JUHE 1948 IN COLUMBIA RIVER BASIN 197 

Salmon River Basin

Salmon River near Obsidian, Idaho

Location.- Lat. 43*58', long. 114*48', In sec. 3, T. 7 N., R. 14 E., three-eighths of a

mile below Irrigation diversion dam, 1 mile upstream from Lost Creek, and 2j miles

southeast of Obsidian. 

Drainage area.- 94.7 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

520 second-feet and extended to peak stage. Shifting-control method used May 1-18,

June 27 to July 31. 

Maxima.- May-June 1948: Discharge, 706 second-feet 9 a.m. June 3 (gage height, 4.22

feet).

1940 to April 1948: Discharge, 664 second-feet May 30, 1943 (gage height, 4.18

feet); gage height recorded, 4.74 feet sometime between Dec. 5, 1940, and Jan. 23,

1941 (lee Jam). 

Remarks.- Several diversions above station for Irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

41

40

42

41

40

61

99

81

67

63

June

445

507

625

541

512

507

533

520

547

514

July

171

160

155

151

119

101

98

85

70

66

Day

11

12

13

14

15

16

17

18

19

20

May

68

84

105

105

128

168

211

258

340

294

June

513

463

494

443

424

396

347

321

299

287

July

63

60

59

57

44

34

32

31

30

29

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...............................................................................

Runoff, in inches ............................................................................................................................

May

301

266

262

323

394

457

499

571

559

458

404

220

2.68

June

315

276

240

228

222

208

200

188

178

180

382

4.51

July

28

21

19

18

18

17

17

17

17

16

15

0.71

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

*H

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.90 

2.85 

2.83 

3.04 

3.28 

3.29

180 

168 

164 

217 

292 

296

May 23

3.18 

3.13 

3.11 

3.15 

3.33 

3.43

253 

237 

231 

244 

303 

339

May 29

4.05 

4.01 

3.93 

3.86 

3.82 

3.82

616 

596 

557 

523 

504 

504

June 4

3.97

3.90 

3.84 

3.82 

3.88

576

542 

514 

504 

532

June 10

3.92 

3.88 

3.82 

3.76 

3.78 

3.85

Ju

3.64

3.55 

3.52

3.54

552 

532 

504 

477 

486 

518

ne!6

424

386 

374

382

,3£| Discharge

May 18

3.18 

3.10 

3.06 

3.12 

3.30 

3.37

256 

231 

220 

237 

296 

321

May 24

3.38 

3.32 

3.27 

3.31 

3.49 

3.62

321 

299 

282 

296 

362 

416

May 30

3.81 

3.77 

3.70 

3.65

3.63

Ju

3.90 

3.87 

3.82 

3.76 

3.78 

3.88

500 

482 

450 

428

420

ne 5

542 

528 

504 

477 

486 

532

June 11

3.93 

3.85

3.73 

3.81

557 

518

464 

500

June 17

3.46 

3.38

3.40

351 

321

328

Gage 

height Discharge

May 19

3.44 

3.48 

3.45 

3.43 

3.42 

3.36

343 

358 

347 

.339 

336 

314

May 25

3.59 

3.52 

3.47 

3.47 

3.64 

3.78

Mi

3.61 

3.60 

3.58 

3.51 

3.58 

3.70

Ju

3.89 

3.86 

3.80 

3.73 

3.78 

3.89

403 

374 

355 

355 

424 

486

iy31

411

407 

399 

370 

399 

450

ne6

537 

523 

495 

464 

486 

537

June 12

3.81 

3.77 

3.70 

3.65 

3.65 

3.77

500 

482 

450 

428 

428 

482

June 18

3.36

3.39 

3.40

314

324 

328

Gage 

height Discharge

May 20

3.30 

3.23 

3.21 

3.26 

3.40 

3.46

292 

269 

262 

279 

328 

. 351

May 26

3.81 

3.74 

3.63 

3.60 

3.70 

3.83

Ju

3.73

3.65 

3.62 

3.68 

3.80

Ju

3.97 

3.91 

3.88 

3.82 

3.83 

3.87

500 

468 

420 

407 

450 

509

ne 1

464

428 

416 

441 

495

ne 7

576 

547 

532 

504 

509 

528

June 13

3.83 

3.89

3.75 

3.72 

3.76

509 

537

472 

459 

477

June 19

3.33

3.28 

3.28 

3.32

303

285 

285 

299

Gage 

height

M:

3.33 

3.28 

3.27

3.30

Discharge

iy21

303 

285 

282

292

May 27

3.87 

3.83 

3.76 

3.70 

3.80 

3.94

Ju

3.85

3.81 

3.76 

3.81 

3.97

Ju

3.88

3.85 

3.80 

3.82 

3.95

528 

509 

477 

450 

495 

562

ne2

518

500 

477 

500 

576

ne8

532

518 

495 

504 

566

June 14

3.76

3.61 

3.63 

3.69

477

411 

420 

446

June 20

3.29

3.24 

3.28 

3.32

289

272 

285 

299

Gage 

height Discharge

May 22

3.17 

3.17 

3.25 

3.23

Ma

3.99 

3.98 

3.93 

3.90 

3.96 

4.05

250 

250 

276 

269

y28

586 

581 

557 

542 

571 

616

June3

4.11 

4.20 

4.15 

4.02 

3.95 

3.95

Ju

4.00 

3.95 

3.89 

3.85 

3.85 

3.90

647 

695 

668 

601 

566 

566

ne9

591

566 

537 

518 

518 

542

June 15

3.72

3.56 

3.60 

3.66

459

391 

407 

433

June 21

3.32 

3.35 

3.38

3.40 

3.38

299 

310 

321

328 

321
198 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Salmon River below Valley Creek, at Stanley, Idaho

Location.- Lat. 44°14', long. 114°55', In SE-frSE£ sec. 34, T. 11 N., R. 13 E., threequarters of a mile downstream from Valley Creek and It miles northeast of Stanley.

Datum of gage Is 6,190.32 feet above mean sea level, datum of 1929. 

Drainage area.- 535 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.-"Stage-discharge relation defined by current-meter measurements below

3,800 second-feet and extended to peak stage. Shifting-control method used May 1 to

July 31. 

Maxima.- May-June 1948: Discharge, 4,090 second-feet 1 to 4 p.m. June 9 (gage height,

1925 to April 1948: Discharge, 5,020 second-feet June 27, 1927 (gage height, 4.41 

feet), from rating curve extended above 4,000 second-feet. 

Remarks.- Diversions above station for Irrigation.

Mean discharge, in seeondrfeet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

687

654

730

791

738

930

1,190

960

836

854

June

2,880

3,120

3,770

3,840

3,600

3,570

3,670

3,790

3,990

3,900

July

1,730

1,720

1,660

1,590

1,430

1,320

1,250

1,200

1,120

1,060

Day

11

12

13

14

15

16

17

18

19

20

May

902

980

1,180

1,170

1,160

1,290

1,430

1,720

2,150

2,090

June

3,700

3,460

3,560

3,400

3,130

2,930

2,700

2,470

2,360

2,190

July

1,040

1,010

980

940

892

845

800

791

764

746

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...... .... ........... .................................................

Runoff, in inches ............................................................................................................................

May

2,130

2,050

1,940

1,980

2,240

2,560

2,860

3,260

3,680

3,410

2,990

1,663

3.58

June

2,360

2,260

2,010

1,870

1,820

1,770

1,690

1,650

1,610

1,620

2,823

5.89

July

721

696

670

646

630

605

589

581

565

533

509

956

2.06

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

t~,

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.16 

2.09 

2.06 

2.09

2.40

1,430 

1,360 

1,330 

1,360

1,710

May 23

2.64

2.56 

2.53 

2.54 

2.59

Ms

3.71 

3.71

3.61

2,020

1,920 

1,880 

1,890 

1,960

>y29

3,790 

3,790

3,590

June 4

3.80 

3.78

3.69

3,910 

3,870

3,690

June 10

3.84 

3.84

3.73

3,950 

3,950

3,730

June 16

3.32 

3.25

2,950 

2,830

Gage 

height Discharge

May 18

2.45

2.34 

2.32

2.54

1,780

1,650 

1,620

1,890

May 24

2.65 

2.65

2.57 

2.60 

2.69

Mt

3.54 

3.41

Ju

3.66 

3.67

3.62

2,020 

2,020

1,920 

1,960 

2,080

iy30

 3,430 

3,180

ne5

3,610 

3,630

3,530

June 11

3.72

3.75 

3.72

3.65

3,710

3,770 

3,710

3,570

June 17

3.19 

3.06

2,720 

2,510

Gage 

height

Ma

2.75 

2.79

2.77 

2.79

Discharge

y!9

2,180 

2,230

2,200 

2,230

May 25

2.78 

2.83 

2.82 

2.79 

2.81 

2.88

ME

3.31

3.22 

3.20

J«

3.61 

3.68

3.62 

3.63

2,200 

2,270 

2,260 

2,220 

2,250 

2,340

iy31

3,000

2,840 

2,810

ne 6

3,510 

3,650

3,530 

3,550

June 12

3.62

3.52 

3.53

3,510

3,310 

3,330

June 18

3.02 

3.03 

3.05

2,450 

2,460 

2,500

Gage 

height

Mi

2.78 

2.70 

2.63 

2.62 

2.64 

2.71

Discharge

iy20

2,220 

2,110 

2,010 

2,000 

2,020 

2,120

May 26

3.04 

3.09 

3.06 

3.04 

3. OS

Ju

3.27

3.25 

3.26

Ju

3.64 

3.74

3.72

2,580 

2,660 

2,610 

2,580 

2,610

ne 1

2,910

2,880 

2,900

ne 7

3,550 

3,750

3,710

June 13

3.59 

3.65 

3.66 

3.71

3.63

3,450 

3,570 

3,590 

3,690

3,530

June 19

3.03

2.96 

2.92

2.86

2,460

2,360 

2,300

2,220

Gage 

height

M«

2.78 

2.78

2.65 

2.65 

2.69

Discharge

iy21

2,220 

2,220

2,040 

2,040 

2,030

May 27

3.22 

3.25

3.24 

3.27

Ju

3.29 

3.42

3.43 

3.50

Ju

3.72 

3.79

3.77

2,880 

2,930

2,910 

2,960

ne2

2,950 

3,180

3,200 

3,330

ne 8

3,710 

3,850

3,810

June 14

3.58 

3.47

3,430 

3,220

June 20

2.84 

2.82

2.84

2,190 

2,160

2,190

Gage 

height Discharge

May 22

2.70

2.66 

2.62

2.62

2,110

2,050 

2,000

2,000

May 28

3.33 

3.50

3.50 

3.55

3,050 

3,370

3,370 

3,470

JuneS

3.78 

3.82

3.82

J«

3.80

3.90 

3.91

3.86

3,870 

3,950

3,950

ne9

3,870

4,070 

4,090

3,990

June 15

3.44 

3.40 

3.37 

3.35

3,160 

3,090 

3,030 

3,000

June 21

2.87 

2.93 

2.97 

3.01 

3.04 

3.02

2,230 

2,320 

2,380 

2,440 

2,480 

2,450
SALMON RIVER BASIN 19i

Salmon River below Yankee Pork, near Clayton, Idaho

Location.- Lat. 44°16S long. 114°44', in sec. 20, T. 11 N., R. 15 E., a quarter of a 

mile downstream from Yankee Pork and 18 miles upstream from Clayton.

Drainage area.- 841 square miles.

Gage-height "record.- Water-stage recorder graph.

Discharge record. -^Stage-discharge relation defined by current-meter measurements below 

5,800 second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge, 7,060 second-feet 10 p.m. June 3 (gage height, 9.27

1921 to April 1948: Discharge, 8,000 second-feet (estimated) June 27, 1927. 

Remarks.- Small diversions above station for Irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

939

888

963

1,040

974

1,230

1,850

1,510

1,250

1,210

June

5,230

5,-760

6,830

6,680

6,210

6,210

6,390

6,520

6,650

6,300

July

2,460

2,430

2,310

2,210

1,990

1,830

1,720

1,620

1,520

1,440

Day

11

12

13

14

15

16

17

18

19

20

May

1,230

1,300

1,560

1,690

1,780

2,170

2,660

3,270

4,000

3,930

June

5,810

5,360

5,380

5,020

4,610

4,360

3,990

3,670

3,480

3,290

July

1,390

1,340

1,280

1,230

1,170

1,110

1,060

1,030

998

968

Day

21

22

23

24

9R

26

27

28

29

30

31

Monthly mean discharge, in second-feet.. ..................................... ... ......

Runoff, in inches ............................................................................................................................

May

3,770

3,510

3,230

3,450

4,170

5,020

5,620

6,280

6,570

5,940

5,190

2,845

3.90

June

3,510

3,370

3,010

2,830

2,720

2,620

2,480

2,410

2,340

2,340

4,513

5.99

July

957

934

911

871

848

826

804

798

787

749

727

1,301

1.78

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.54 

5.41 

5.28 

5.36 

5.98 

6.32

2,620 

2,500 

2,380 

2,450 

3,010 

3,350

May 23

6.30 3,330 

6.24 3,270 

6.13| 3,160 

6.081 3,110 

6.17< 3,200 

6.30 3,330

May 29

9.00 

8.99 

8.96 

8.92 

8.90 

8.82

Ju

9.17 

9.09 

9.00 

8.93 

8.89 

8.84

6,650 

6,640 

6,590 

6,540 

6,510 

6,400

ne 4

6,900 

6,780 

6,650 

6,550 

6,500 

6,430

June 10

8.85 

8.78 

8.72 

8.68 

8.68 

8.61

Ju

7.30 

7.21 

7.12

6,440 

6,340 

6,260 

6,200 

6,200 

6,100

ne!6

4,410 

4,300 

4,200

Gage 

height Discharge

May 18

6.38 

6.27 

6.10 

6.05 

6.24 

6.52

3,410 

3,300 

3,130 

3,080 

3,270 

3,550

May 24

6.35 

6.36 

6.30 

6.30 

6.62 

6.83

3,380 

3,390 

3,330 

3,330 

3,650 

3,880

May 30

8.59 

8.38 

8.19

6,080 

5,780 

5,530

June 5

8.75 

8.68 

8.62 

8.60 

8.69 

8.72

6,300 

6,200 

6,120 

6,090 

6,220 

6,260

June 11

8.50 

8.43

8.35 

8.27

5,950 

5,850

5,740 

5,630

June 17

6.99 

6.87 

6.72

4,060 

3,930 

3,760

Gage 

height Discharge

May 19

6.69 

6.88 

6.96 

7.04 

7.17 

7.17

3,730 

3,940 

4,030 

4,110 

4,260 

4,260

May 25

6.94 

7.00 

6.99 

7.03 

7.37 

7.58

m

7.96 

7.86 

7.79 

7.84 

7.88

4,000 

4,070 

4,060 

4,100 

4,490 

4,750

iy31

5,230 

5,100 

5,010 

5,070 

5,120

June 6

8.69 

8.65 

8.62 

8.62 

8.77 

8.82

6,220 

6,160 

6,120 

6,120 

6,330 

6,400

June 12

8.12

7.98 

7.93 

7.93

5,440

5,250 

5,190 

5,190

June 18

6.58 

6.60 

6.65 

6.64

3,610 

3,630 

3,680 

3,670

Gage 

height Discharge

May 20

7.11 

6.95 

6.74 

6.66 

6.77 

6.84

4,190 

4,020 

3,780 

3,700 

3,820 

3,890

May 26

7.68 

7.73 

7.74 

7.81 

7.98 

8.12

4,870 

4,930 

4,940 

5,030 

5,250 

5,440

June 1

7.90 

7.92 

8.10 

8.22

Ju

8.79 

8.77 

8.78 

8.79 

8.88 

8.92

5,150 

5,180 

5,410 

5,570

ne7

6,360 

6,330 

6,340 

6,360 

6} 480 

6,540

June IS'

8.12 

8.13 

8.09 

8.07 

8.07 

7.99

5,440 

5,450 

5,400 

5,370 

5,370 

5,270

June 19

6.51

6.37 

6.33

6.35

3,540

3,400 

3,360

3,380

Gage 

height Discharge

May 21

6.88 

6.86 

6.72 

6.59 

6.60 

6.62

3,940 

3,920 

3,760 

3,620 

3,630 

3,650

May 27

8.16 

8.18 

8.17 

8.24 

8.46 

8.59

.Ju

8.30 

8.33 

8.54 

8.78

Ju

8.87

8.84 

8.87 

9.00 

9.04

5,490 

5,510 

5,500 

5,590 

5,890 

6,080

ne2

5,670 

5,710 

6,010 

6,340

ne8

6,470

6,430 

6,470 

6,650 

6,710

June 14

7.86 

7.72 

7.61

5,100 

4,920 

4,780

June 20

6.28

6.20 

6.22 

6.28

3,310

3,230 

3,250

3,310

Gage 

height Discharge

May 22

6.60 

6.55 

6.48 

6.40 

6.35 

6.33

3,630 

3,580 

3,510 

3,430 

3,380 

3,360

May 28

8.61 

8.66 

8.71 

8.77 

8.87 

8.98

Ju

9.00 

9.10 

9.16 

9.20 

9.25 

9.24

Ju

9.00 

8.99

9.01 

8.97

6,100 

6,170 

6,240 

6,330 

6,470 

6,620

ne3

6,650 

6,800 

6,890 

6,950 

7,020 

7,010

ne9

6,650 

6,640

6,660 

6,610

June 15

7.45 

7.39 

7.40 

7.41

4,590 

4,520 

4,530 

4,540

June 21

6.32 

6.43 

6.51 

6.54 

6.63 

6.61

3,350 

3,460 

3,540 

3,570 

3,660 

3,640

Supplemental record.- June 3, 10 p.m., 9.27 ft., 7,060 sec.-ft.
200 FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Salmon River near Challis, Idaho

Location.- Lat. 44°23', long. 114°15', in sec. 7, T. 12 N., R. 19 E., 250 feet downstream from Bayhorse Creek and 9 miles south of Challis. Datum of gage is 5,163.99

feet above mean sea level, datum of 1929. 

Drainage area.- 1,800 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

8,400 second-feet and extended to peak stage. 

Maxima.- May-June 1948: Discharge, 10,300 second>-feet 3 to 5 p.m. June 3; gage height,

8.04 feet 3:30 p.m. June 3.

1928 to April 1948: Discharge, 10,500 second-feet May 30, 1943 (gage height,

8.07 feet). 

Remarks.- Some diversion above station for irrigation.

Mean discharge, in second-feet, 1H8

Day

1

2

3

4

5

6

7

8

9

10

May

1,320

1,200

1,240

1,350

1,270

1,420

2,180

2,130

1,740

1,630

June

7,280

8,060

9,790

9,610

8,800

8,820

9,170

9,380

9,750

9,160

July

3,740

3,730

3,490

3,350

3,060

2,810

2,640

2,510

2,380

2,280

Day

11

12

13

14

IB

16

17

18

19

20

May

1,580

1,620

1,840

2,110

2,130

2,550

3,180

4,210

4,840

5,090

June

8,690

7,870

7,690

7,320

6,640

6,270

5,800

5,23C

-5,010

4,790

July

2,240

2,180

2,100

2,010

1,910

1,840

1,770

1,710

1,670

1,620

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ............... .......... ....................................

Runoff, in inches ................................................... .... ..................................................................

May

4,890

4,790

4,430

4,670

5,800

7,160

7,790

8,830

9,280

8,220

7,230

3 797

2.43

June

5,050

4,990

4,490

4,240

4,110

3,950

3,780

3,680

3,640

3,620

4.06

July

1,580

1,540

1,500

1,440

1,390

1,340

1,290

1,270

1,260

1,220

1,180

1.32

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.81 

4.99 

4.95 

4.87 

4.82 

5.07

3,080 

3,860 

3,300 

3,180 

3,100 

3,490

May 23

5.68 

5.64 

5.61 

5.56 

5.50 

5.55

M,

7.73 

7.78 

7.74 

7.64 

7.56 

7.50

Ju

7.95 

7.88 

7.80 

7.67 

7.62 

7.60

4,580 

4,510 

4,450 

4,350 

4,240 

4,340

ly 29

9,440 

9,580 

9,470 

9,200 

8,990 

8,830

ne 4

10,100 

9,860 

9,640 

9,280 

9,140 

9, -090

June 10

7.77 

7.69 

7.62 

7.53 

7.47 

7.55

Ju

6.54 

6.51 

6.45

6.35

9,5SO 

9,330 

9,140 

8,910 

8,750 

8,960

ne!6

6,470 

6,400 

6,260

6,040

Gage 

height Discharge

May 18

5.50 

5.65 

5.61 

5.47 

5.39 

5.45

4,240 

4,520 

4,450 

4,190 

4,040 

4,150

May 24

5.68 

5.75 

5.76 

5.74 

5.69 

5.87

4,5ffO 

4,720 

4,740 

4,700 

4,600 

4,970

May 30

7.33 

7.17 

7.06

Ju

7.58 

7.53 

7.46 

7.41 

7.42 

7.47

8,400 

8,000 

7,720

ne 5

9,040 

8,910 

8,730 

8,600 

8,620 

8,750

June 11

7.60 

7.56 

7.45 

7.38 

7.28 

7.25

9,090 

8,990 

8,700 

8,520 

8,270 

8,200

June 17

6.32

6.20 

6.08

5,970 

5,690 

5,420

Gage 

height Discharge

May 19

5.61 

5.75 

5.84 

5.91 

5.96 

6.07

4,450 

4,720 

4,900 

5,050 

5,160 

5,390

May 25

6.14 

6.27 

6.31 

6.30 

6.28 

6.50

5,550 

5,850 

5,940 

5,920 

5,870 

6,380

May 31

6.93

6.74 

6.73 

6.79

7,400

6,950 

6,920 

7,070

June 6

7.54 

7.56 

7.49 

7.45 

7.44 

7.52

8,930 

8,990 

8,800 

8,700 

8,670 

8,880

June 12

7.25 

7.20 

7.15 

7.05 

6.97 

6.96

8,200 

8,070 

7,940 

7,700 

7,500 

7,470

June 18

6.03 

5.93 

5.97

5,310 

5,090 

5,180

Gage 

height Discharge

May 20

6.08 

6.05 

5.95 

5.83 5.73' 

5.79

5,420 

5,350 

5,140 

4,880 

4,680 

4,800

May 26

6.80 

6.90 

6.90 

6.83 

6.84 

6.91

7,090 

7,330 

7,330 

7,160 

7,190 

7,350

June 1

6.87 

6.88 

6.87 

6.87 

6.88 

7.01

7,260 

7,280 

7,260 

7,260 

7,280 

7,600

June 7

7.66 

7.68 

7.65 

7.60 

7.60 

7.67

9,250 

9,310 

9,220 

9,090 

9,090 

9,280

June 13

6.99 

7.10 

7.13 

7.08

7.01 

7.00

7,550 

7,820 

7,900 

7,770 

7,600 

7,570

June 19

6.60 

5.95

5.83 

5.80 

5.78

5,240 

5,140

4,880 

4,820 

4,780

Gage 

height

M

5.88 

5.90 

5.89 

5.82 

5.74 

5.74

Discharge

iy2l

4,990 

5,030 

5,010 

4,860 

4,700 

4,700

May 27

7.11 

7.13 

7.09 

7.05 

7.07 

7.26

7, -840 

7,900 

7,800 

7,700 

7,740 

8,220

June 2

7.13 

7.18 

7.19 

7.20 

7.25 

7.43

Ju

7.75 

7.74 

7.71 

7.65 

7.66 

7.79

7,900 

8,020 

8,040 

8,070 

8,200 

8,650

ne8

9,500 

9,470 

9,390 

9,220 

9,250 

9,610

June 14

7.02 

6.98 

6.92 

6.83 

6.77 

6.72

Ju

5.83 

5.85

5.76 

5.72 

5.72

7,620 

7,520 

7,380 

7,160 

7,020 

6,900

ne20

4,880 

4,920

4,740 

4,660 

4,660

&£ \ Discharge

May 22

5.81 

5.85 

5.84 

5.79 

5.72 

5.68

4,840 

4,920 

4,900 

4,800 

4,660 

4,580

May 28

7.44 

7.50 

7.58 

7.55 

7.47 

7.65

8,670 

8,830 

9,040 

8,960 

8,750 

9,220

June 3

7.63 

7.80 

7.93 

8.03 

8.01 

7.98

Ju

7.91 

7.33 

7.88 

7.79 

7.75 

7.77

9,170 

9,640 

10,000 

10,300 

10,200 

10,200

ne9

9,950 

10,000 

9,860 

9,610 

9,500 

9,560

June 15

6.71 

6.67 

6.62 

6.56 

6.50 

6.49

Ju

5.87 

5.92 

5.99

6.03

6,870 

6,780 

6,660 

6,520 

6,380 

6,360

ne21

4,970 

5,070 

5,220

5,310
SALMON RIVER BASIN 201

Salmon River at Salmon, Idaho

Location.- Lat. 45°11', long. 1I3°54', in sec. 6, T. 21 N., R. 22 E., Just upstream 

from Lemhi River, near Rose ranch buildings, 1,000 feet downstream from island, and 

three-eighths of a mile downstream from highway bridge at Salmon.

Drainage area.- 3,760 square miles.

Gage-height "record.- Water-stage recorder graph.

Discharge record.-^Stage-discharge relation defined by current-meter measurements.

Maxima.- May-'june 1948: Discharge, 10,900 second-feet 11 a.m. June 4 (gage height,

1912-16, 1919 to April 1948: Discharge observed, 16,400 seeond-feet June 12, 

1921 (gage height, 9.35 feet, staff gage at site 700 feet upstream). 

Remarks.- Diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,820

1,630

1,510

1,560

1,630

1,540

1,940

2,820

2,510

2,210

June

8,660

8,930

9,770

10,800

10,200

9,750

9,840

9,950

10,100

10,000

July

4,460

4,620

4,510

4,350

4,090

3,820

3,510

3,310

3,180

2,970

Day

11

12

13

14

15

16

17

18

19

20

May

2,090

2,050

2,090

2,390

2,510

2,660

3,270

4,270

5,150

6,140

June

9,540

9,140

8,720

8,490

7,880

7,360

7,040

6,510

6,230

5,950

July

2,850

2,870

2,730

2,620

2,500

2,390

2,280

2,240

2,190

2,130

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet

Runoff, in inches............................................................................................................................

May

5,970

5,840

5,420

5,200

5,820

7,080

8,280

9,320

10,300

10,200

9,250

1.33

June

6,270

6,680

6,070

5,700

5,450

5,250

4,990

4,760

4,600

4,490

7

C*'7

2.27

July

2,080

2,000

1,920

1,850

1,780

1,730

1,690

1,630

1,620

1,600

1,540

2

/>*?Q

0. 82

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.30 

4.27 

4.26 

4.42 

4.62 

4.66

3,080 

3,020 

3,000 

3,310 

3,710 

3,800

r May 23

5.44 

5.40 

5.37 

5.34 

5.32 

5.30

M:

7.07 

7.07 

7.08 

7.14 

7.19 

7.20

Ju

7.29 

7.31 

7.31 

7.30 

7.28 

7.25

5,570 

5,470 

5,400 

5,330 

5,280 

5,230

»y29

10,100 

10,100 

10,200 

10,400 

10,500 

10,500

ne4

10,800 

10,900 

10,900. 

10,900 

10,800 

10,700

June 10

7.09 

7.06 

7.03 

7.02 

7.00 

6.95

Ju

6.12 

6.09 

6.08 

6.12 

' 6.12 

6.08

10,200 

10,100 

10,000 

9,980 

9,920 

9,770

ne!6

7,390 

7,310 

7,280 

7,390 

7,390 

7,280

Gage 

height Discharge

May 18

4.64 

4.64 

4.74 

5.07 

5.21 

5.24

3,750 

3,750 

3,960 

4,690 

5,010 

5,090

May 24

5.27 

5.22 

5.24 

5.31 

5.35 

5.37

5,160 

5,040 

5,090 

5,250 

5,350 

5,400

May 30

7.16 

7.12 

7.08 

7.05 

6.98 

6.92

10,400 

10,300 

10,200 

10,100 

9,860 

9,680

June 5

7.17 

7.12 

7.09 

7.06 

7.03 

6.98

Ju

6.90 

6.86 

6.85 

6.86 

6.87 

6.84

10,400 

10,300 

10,200 

10,100 

10,000 

9,860

ne 11

9,620 

9,500 

9,470 

9,500 

9,530 

9,440

June 17

6.05 

6.01 

5.98 

5.98 

5.94 

5.90

7,200 

7,090 

7,000 

7,000 

6,900 

6,790

Gage 

height Discharge

May 19

5.19 

5.15 

5.18 

5.31 

5.40 

5.49

4,970 

4,880 

4,940 

5,250 

5,470 

5,700

May 25

5.38 

5.37 

5.47 

5.66 

5.75 

5.80

5,420 

5,400 

5,640 

6,130 

6,360 

6,490

May 31

6.87 

6.83 

6.78 

6.73 

6.68 

6.62

.Ju

6.95 

6.93 

6.92 

6.95 

6.97 

6.95

9,530 

9,410 

9,260 

9,110 

8,960 

8,790

ne6

9,770 

9,710 

9,680 

9,770 

9,830 

9,770

June 12 1

6.79 

6.75 

6.72 

6.71 

6.71 

6.66

9,290 

9,170 

9,080 

9,050 

9,050 

8,900

June 18

5.86 

5.81 

5.77 

5.76 

5.73 

5.70

6,710 

6,570 

6,460 

6,440 

6,360 

6,280

Gage 

height Discharge

May 20

5.57 

5.63 

5.71 

5.74 

5.74 

5.69

5,900 

6,050 

6,260 

6,330 

6,330 

6,200

May 26

5.82 

5.84 

5.97 

6.16 

6.27 

6.32

6,540 

6,600 

6,950 

7,480 

7,790 

7,930

June 1

6.57 

6.55 

6.56 

6.59 

6.59 

6.58

8,640 

8,580 

8,610 

8,700 

8,700 

8,670

June 7

6.94 

6.94 

6.95 

6.99 

7.03 

7.02

9,740 

9,740 

9,770 

9,890 

10,000 

9,980

June 13

6.63 

6.58 

6.57 

6.56 

6.60 

6.62

8,820 

8,670 

8,640 

8,610 

8,730 

8,790

June 19

5.69 

5.69 

5.69 

5.69 

5.65 

5.61

6,260 

6,260 

6,260 

6,260 

6,150 

6,050

Gage 

height Discharge

May 21

5.61 

5.54 

5.56 

5.61 

5.62 

5.63

6,000 

5,820 

5,870 

6,000 

6,020 

6,050

May 27

6.34 

6.36 

6.41 

6.52 

6.59 

6.62

7,980 

8,040 

8,180 

8,500 

8,700 

8,790

June 2

6.58 

6.59 

6.65 

6.72 

6.77 

6.80

Ju

7.00 

6.99 

6.99 

7.02 

7.03 

7.05

8,670 

8,700 

8,880 

9,080 

9,230 

9,320

ne8

9,920 

9,890 

9,890 

9,980 

10,000 

10,100

June 14

6.58 

6.53 

6.51 

S.50 

6.47 

6.42

8,670 

8,530 

8,470 

8,440 

8,350 

8,210

June 20

5.56 

5.61 

5.56 

5.56 

5.56 

5.55

5,920 

6,050 

5,920 

5,920 

5,920 

5,900

Gage 

height Discharge

May 22

5.60 

5.55 

5.53 

5.53 

5.52 

5.49

5,970 

5,840 

5,800 

5,800 

5,770 

5,700

May 28 -

6.64 

6.67 

6.77 

6.89 

7.00 

7.03

8,850 

8,930 

9,230 

9,590 

9,920 

10,000

June3

6.81 

6.85 

6.91 

7.00 

7.12 

7.23

Jl

7.02 

7.00 

7.01 

7.06 

7.10 

7.12

9,350 

9,470 

9,650 

9,920 

10,300 

10,600

ne9

9,980 

9,920 

9,950 

10,100 

10,200 

10,300

June 15

6.37 

6.32 

6.29 

6.27 

6.22 

6.17

8,090 

7,950 

7,870 

7,810 

7,670 

7,530

June 21

5.57 

5.61 

5.67 

5.74 

5.81 

5.87

5,970 

6,070 

6,230 

6,410 

6,600 

6,760

Supplemental record.- June 4, 11 a.m., 7.32 ft., 10,900 see.-ft. 

824933 O - 49 - 15
202 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Salmon River near Shoup, Idaho

Location.- Lat. 45°19'30", long. 114°25', In sec. 13, T. 23 N., R. 17 E., 200 feet downstream from highway bridge, 1 mile downstream from Panther Creek, and 8 miles southwest of Shoup.

Drainage area.- 6,270 square miles.

gage-height record.- Staff gage read once daily.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

11,400 second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge observed, 16,900 second-feet 5 p.m. June 4 (gage 

height, 7.90 feet).

1944 to April 1948: Discharge observed, 16,600 second-feet May 10, 1947 (gage 

height, 7.79 feet).

Remarks. - Diversions .above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,840

2,680

2,520

2,370

2,370

2,460

3,010

4,410

4,200

3,580

June

12,600

13,200

15,300

16,900

16,600

15,300

14,500

14,500

15,000

14,800

July

6,870

7,100

7,100

6,640

6,410

5,950

5,510

5,070

5,070

4,630

Day

11

12

13

14

15

16

17

18

19

20

May

3,380

3,190

3,380

3,780

3,990

4,200

4,200

7,100

8,730

10,200

June

13,700

12,500

11,900

9,900

10,200

9,900

9,700

8,730

8,490

8,250

July

4,410

4,200

3,990

3,780

3,580

3,380

3,190

2,840

3,010

3,010

Day

21

22

23

24

25

26

27

28

39

30

31

Monthly mean discharge, in second-feet . . . .... . .... ., .. . .. ... ..... .. . . ......................

Runoff, in inches ............................................................................................................................

May

9,900

10,200

9,700

7,100

9,450

11,100

13,200

15,300

16,600

15,800

13,200

6,908

1.27

June

8,730

9,900

8,970

8,730

8,020

8,020

7,790

7J330

7,100

6,870

11,110

1.98

July

3,010

2,680

2,680

2,680

2,520

2,370

2,370

2,370

2,370

2,370

2,370

3,985

0.73

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

6

5

5

5

12:40

5:30

6

2

5

5

Gage 

height Discharge

May 17

2.70 4,200

May 18

4.00 7,100

May 19

4.70 8,730

May 20

5.30 10,200

May 21

5.25

5.15

10,000

9,800

May 22

5.30 10,200

May 23

5.10 9,700

May 24

4.00 7,100

May 25

5.00 9,450

Hour

5

5

4

5

4

5

5

5

5

height Discharge

May 26

5.70 11,100

May 27

6.50 13,200

May 28

7.30 15,300

May 29

7.80 16,600

May 30

7.50 15,800

May 31

6.50

Jun

6.30

13,200

e 1

12,600

June 2

6.50 13,200

June 3

7.30 15,300

Hour

5

5

6

5

5

4

5

4

12:50

5

Gage 

height Discharge

June 4

7.90 16,900

June 5

7.80 16,600

June 6

7.30 15,300

June 7

7.00 14,500

June 8

7.00 14,500

June 9

7.20

June

7.10

15,000

10

14,800

June 11 .

6.70 13,700

June 12

6.30

6.20

12,600.

12,400

Hour

5

7

6

7

6

5:45

5

4

5

Gage 

height

June

6.00

June

5.20

June

5.30

June

5.20

June

5.10

June

4.70

June

4.60

June

4.50

June

4.70

Discharge

13

11,900

14

9,900

15

10,200

16

9,900

17

9,700

18

8,730

19

8,490

20

8,250

21

8,730

Note.- All readings made after noon.
SALMON RIVER BASIN 203

Salmon River near French Creek, Idaho

Location.- Lat. 45°26', long. 115°59', in sec. 8, T. 24 N., R. 4 E., 100 feet downstream

from Pall Creek, 2| miles northeast of French Creek post office, and 16 miles east of

Riggins.

Drainage area.- 12,270 square miles. 

Gage-height record.- Staff gage read twice daily. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

65,500 second-feet and extended to peak stage. 

Maxima.- May-June 1948: Discharge observed, 75,300 second-feet 7:25 a.m. May 29 (gage

Height, 33.50 feet).

1944 to April 1948: Discharge observed, 67,300 second-feet May 9, 1947 (gage

height, 30.7 feet, from high-water mark). 

Remarks.- Diversion above station for irrigation is negligible percentage of total flow.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

11,300

10,600

9,900

9,690

9,520

9,960

13,600

17,400

17,400

15,600

Jane

60,700

62,300

71,700

71,000

66,800

64,500

66,500

67,300

65,700

63,100

July

23,600

23,700

22,200

20,700

19,400

 18,100

16,600

15,700

14,800

14,100

Day

11

12

18

14

15

16

17

18

19

20

May

14,400

13,900

14,700

17,300

18,600

20,900

25,700

37,300

42,900

49,100

June

59,400

54,400

51,900

48,700

45,300

43,200

40,100

37,500

35,300

33,900

July

13,500

13,300

12,700

12,000

11,500

11,000

10,500

10,300

10,400

10,500

Day

21

22

28

24

25

26

27

28

29

30

81

Monthly mean discharge, in second-feet ..............................................................................

Runoff, in inches ............................................................................................................................

May

50,100

50,200

48,200

47,000

50,400

57,400

63,700

69,800

74,800

68,500

62,600

32,980

3.10

June

35,900

37,700

34,700

32,400

30,800

29,300

27,500

26,200

24,900

23,900

47,090

4.28

July

9,900

9,380

9,000

8,560

8,200

7,860

7,670

7,980

8,660

8,260

7,600

12,830

1.21

Gage height, in feet, and discharge, in second-feet, at indicated time,

Hour

7:30 

6:30

7:30 

6:30

7:45 

6:30

7:15 

6:25

7:45 

6:20

8 

6:20

7:45 

6:20

7:45 

6:25

7:30 

6:30

Gage 

height Discharge

May 17 

12.66 21,900 

15.96 29,600

May 18 

18.52 35,700 

19.82 38,900

May 19 

20.72 41,100 

22.14 44,600

May 20 

23.66 48,400 

24.20 49,800

May 21 

24.42 50,400 

24.22 49,800

May 22 

24.26 49,900 

24.46 50,500

May 23 

23.78 48,700 

23.36 47,700

May 24 

23.30 47,500 

22.88 46,500

May 25 

24.12 49,600 

24.76 51,200

Hour

7:35 

6:30

7:50 

6:25

7:30 

6:30

7:25 

6:30

7:20 

6:35

7:45 

6:25

7:10 

6:20

7:15 

6:15

7:30 

6:35

Gage 

height

May 

26.42 

27.68

May 

29.00 

29. 8O

May 

31.40 

31.76

May 

33.50 

33.10

May 

31.70 

30.48

Discharge

26 

55,600 

59,000

27

62,600 

64,800

28 

69,300 

70,300

29 

75,300 

74,200

30 

70,200 

66,700

May 31 

29.54 64,100 

28.48 61,200

June 1 

28.48 61,200 

28.14 60,300

June 2 

28.26 60,600 

29.48 63,900

June 3 

31.40 69,300 

33.04 74,000

Hour

7:30 

6:40

7:30 

6:30

7:20 

6:30

7:15 

7

7 6*

6:15a 

6:30p

6a 

6:3Qf

7:20 

6:30

7 

6:15

Gage 

height Discharge

June 4 

32.50 72,400 

31.50 69,600

June 5 

30.90 67,900 

30.10 65,700

June 6 

30.28 66,100 

29.04 62,700

June 7 

30.30 66,200 

30.50 66,800

June 8 

30.80 67,600 

30.58 67,000

June 9 

30.34 66,300 

29.84 64,900

June 10 

29.56 64,200 

28.76 62,000

June 11 

28.02 60,000 

27.56 58,700

June 12 

26.44 55,600 

25.48 53,100

Hour

7 

6:20

7 

6:35

7:30 

6:30

7:30 

6:30

8:45 

6:45

7:30 

6:35

7:15 

6:35

7:20 

6:30

7:30 

6:40

Gage 

height Discharge

June 13 

25.08 52,100 

24.94 51,700

June 14 

24.08 49,500 

23.48 48,000

June 15 

22.64 45,900 

22.18 44,700

June 16 

21.82 43,800 

21.34 42,600

June 17 

20.38 40,200 

20.26 39,900

June 18 

19.52 38,100 

18.94 36,700

June 19 

18.42 35,500 

18.28 35,200

June 20 

17.94 34,400 

17.56 33,400

June 21 

18.12 34,800 

19.04 37,000
204 FLOODS OP MAY-TONE 1948 IN COLUMBIA RIVER BASIN

Salmon River at Whitebird, Idaho

Location.- Lat. 45°45", long. 116°20', in sec. 22, T. 28 N., R. IE., Just upstream

from Whitebird Creek, half a mile downstream from Canfield-Joseph highway bridge,

and 1 mile southwest of Whitebird.

Drainage area.- 13,550 square miles, including that of Whitebird Creek. 

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 103,000 second-feet 9 to 12 p.m. June 3 (gage

height, 32.95 feet).

1910-17, 1919 to April 1948: Discharge observed, 88,800 second-feet June 9,

1921 (gage height, 31.2 feet).

Stage known, about 37.5 feet, present datum, June 1894 (discharge, 120,000

second-feet). 

Remarks.- Negligible amount of diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

14,600

14,000

13,000

12,800

12,700

12,800

16,000

20,000

21,500

19,400

June

80,800

84,300

96,400

98,200

91,000

88,900

90,000

90,900

88,400

85,100

July

26,000

25,800

24,000

22,500

21,100

19,500

18,100

17,000

16,200

15,400

Day

11

12

13

14

15

16

17

18

19

20

May

18,000

17,200

17,900

20,500

22', 300

24,200

31,000

41,800

50,400

59,100

June

78,900

71,400

66,600

62,000

56,500

53,200

48,500

44,300

41,100

39,400

July

14,900

14,600

13,900

12,500

12,000

11,500

11,200

11,200

11,500

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet. . . ..................................................

Runoff, in inches ............................................................................................................................

May

- 62,100

67,500

66,400

62,600

66,200

75,900

85,500

92,600

99,200

92,900

84,500

3.61

June

40,900

43,800

40,700

37,200

35,000

33,000

30,900

29,200

27,700

26,400

4.94

July

11,000

10,400

9,860

9,430

9,180

8,810

8,580

8,990

9,980

9, .790

9,110

1.20

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

M

4 

8 

N 

4 

8 

12

x

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

20.95 

21.30 

21.65 

21.85 

22.10 

22.57

28,300 

29,800 

31,400 

32,300 

33,500 

35,800

May 23

28.00 

27.80 

27.56 

27.37 

27.32 

27.27

Mi

32.12 

32.53 

32.59 

32.53 

32.42 

32.24

68,900 

67,500 

65,900 

64,700 

64,300 

64,000

iy29

97,400 

100,400 

100,800 

100,400 

99,600 

98,300

June 4

32.75 

32.50 

32.19 

31.90 

31.73 

31.65

102,000 

100,200 

97,900 

95,900 

94,700 

94,200

June 10

30.75 

30.60 

30.36 

30.12 

29.98 

30.01

87,800 

86,700 

85,000 

83,300 

82,400 

82,600

June 16

25.84 

25.71 

25.60 

25.48 

25.41 

25.40

54,600 

53,800 

53,100 

52,300 

51,900 

51,800

Gage 

height

M;

23.08 

23.45 

23.80 

23.95 

24.26 

24.64

Discharge

iy 18

38,400 

40,400 

42,400 

43,200 

45,000 

47,200

May 24

27.21 

27.13 

27.00 

26.85 

26.96 

L27.15

63,600 

63,100 

62,200 

61,200 

61,900 

63,200

May 30

32.03 

31.79 

31.45 

31.14 

30.93 

30.78

Ju

31-. 50 

31.36 

31.16 

30.95 

30.92 

31.05

Ju

29.88 

29.67 

29.45 

29.26 

29.11 

29.10

96,800 

95,100 

92,800 

90,600 

89,000 

88,000

ne5

93,100 

92,100 

90,700 

89,200 

88,900 

89,900

nell

81,700 

80,200 

78,600 

77,300 

76,300 

76,200

June 17

25.21 

24.98 

24.80 

24.62 

24.55 

24.53

50,600 

49,200 

48,100 

47,100 

46,700 

46,600

Gage 

height

M£

24.81 

24.97 

25.09 

25.26 

25.55 

26.00

Discharge

iy 19

48,200 

49,100 

49,800 

50,900 

52,800 

55,600

May 25

27.29 

27.49 

27.56 

27.61 

27.89 

28.32

Mi

30.64 

30.49 

30.27 

30.07 

29.90 

29.88

Jl

31.07 

30.98 

30.82 

30.71 

30.83 

31.05

64,100 

65,400 

65,900 

66,300 

68,100 

71,000

iy31

87,000 

85,900 

84,400 

83,000 

81,800 

81,700

ne6

90,100 

89,400 

88,200 

87,500 

88,300 

89,900

June 12

28.89 

28.64 

28.31 

28.02 

27.89 

27.87

74,800 

73,200 

71,000 

69,000 

68,100 

68,000

June 18

24.44 

24.27 

24.11 

23.98 

23.85 

23.80

46,000 

45,000 

44,200 

43,400 

42,600 

42,400

Gage 

height

Ms

26.30 

26.54 

26.64 

26.70 

26.87 

26.99

M:

28.61 

28.90 

29.03 

29.17 

29.45 

29.84

Discharge

y20

57,500 

59,100 

59,800 

60,200 

61,300 

62,100

iy26

73,000 

74,900 

75,800 

76,700 

78,600 

81,400

June 1

29.85 

29.82 

29.73 

29.64 

29.63 

29.88

Ju

31.10 

31.10 

30.98 

30.90 

31.09 

31.30

Ju

27.77 

27.73 

27.66 

27.51 

27.55 

27.59

81,400 

81,200 

80,600 

80,000 

79,900 

81,700

ne7

90,300 

90,300 

89,400 

88,800 

90,200 

91,700

ne 13

67,300 

67,100 

66,600 

65,600 

65,800 

66,100

June 19

23.70 

23.60 

23.53 

23.43 

23.44 

23.50

41,800 

41,300 

40,900 

40,400 

40,400 

40,700

Gage 

height

M

27.03 

27,07 

26.92 

26.86 

27.00 

27.06

Discharge

iy21

62,400 

62,700 

61,600 

61,300 

62,200 

62,600

May 27

30.10 

30.29 

30.38 

30.43 

30.66 

30.96

Ju

30.05 

30.24 

30.26 

30.26 

30.42 

30.74

Ju

31.36 

31.30 

31.16 

31.04 

31.04 

31.11

83,200 

84,500 

85,200 

85,500 

87,100 

89,200

ne2

82,800 

84, 200 

84,300 

84,300 

85,400 

87,700

ne8

92,100 

91,700 

90,700 

89,800 

89,800 

90,400

June 14

27.40 

27.17 

26.92 

26.67 

26.55 

26.60

64,900 

63,300 

61,600 

60,000 

59,200 

59,500

June 20

23.45 

23.31 

23.21 

23.11 

23.12 

23.24

40,400 

39,700 

39,200 

38,600 

38,600 

39,300

Gage 

height

Me

27.21 

27.55 

28.03 

28.16 

28.24 

28.17

Discharge

iy22

63,600 

65,800 

69,100 

70,000 

70,500 

70,000

May .28

31.21 

31.43 

31.49 

31.51 

31.58 

31.77

91,100 

92,600 

93,000 

93,200 

93,700 

95,000

June 3

30.92 

31 .-28 

32.15 

32.65 

32.94 

32.95

Ju

31.09 

30.96 

30.79 

30.58 

30.66 

30.82

88,900 

91,600 

97,600 

101,200 

103,300 

103,400

ne 9

90,200 

89,200 

88,000 

86,600 

87,100 

88,200

June 15

26.48 

26.21 

26.00 

25.85 

26.04 

25.95

58,800 

57,000 

55,600 

54,600 

55,800 

55,300

June 21

23.28 

23.36 

23.54 

23.70 

23.79 

23.90

39,500 

40,000 

40,900 

41,800 

42,300 

42,900

Supplemental record.- June 3, 9 p.m., 32.95 ft., 103,400 sec.-ft.
SALMON RIVER BASIN . 205

Alturas Lake Creek near Obsidian, Idaho

Location.- Lat. 43°56', long. 114°50', in SWf sec. 9, T. 7 N., R. 14 E., 1 mile downstream from outlet of Perkins Lake, 1-J miles downstream from outlet of Alturas Lake,

and 4 miles south of Obsidian. 

Drainage area.- 35.7 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

570 second-feet and extended to peak stage. Shifting-control method used May 1 to

July 31. 

Maxima.- May-June 1948: Discharge, 609 second-feet noon> to 4 p.m. June 9 (gage height,

5.41 feet).

1940 to April 1948: Discharge, 612 second-feet May 31, 1943 (gage height, 5.30

feet). 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

43

42

42

44

43

46

50

57

59

60

June

452

488

568

594

564

548

557

568

601

592

July

201

189

176

162

148

133

123

115

107

101

Day

11

12

18

14

15

16

17

18

19

20

May

62

65

74 -80

90

102

125

166

234

255

June

568

535

538

532

494

460

414

373

338

308

July

95

90

86

83

78

74

70

65

63

60

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches............................................................................................................................

May

268

264

247

244

279

358

427

509

586

553

473

6.20

June

310

282

260

242

232

220

209

199

194

197

415

12.96

July

58

56

53

54

49

47

45

42

40

39

39

pp A

2.86

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

«$ft | Discharge

May 17

3.08 

3.11 

3.17 

3.27 

3.35 

3.37

til

4.01 

3.97 

3.96

Mi

5.27 

5.31 

5.34 

5.33

5.29

110 

113 

121 

133 

143 

146

iy23

251 

242 

240

iy29

576 

588 

597 

394

582

June 4

5.38 

5.34 

5.29

603 

591 

576

June 10

5.38 

5.34 

5.30

Ju

4.90 

4.85 

4.80

600 

588 

576

ne!6

467 

454

440

Gage 

height Discharge

May 18

3.39 

3.43 

3.49 

3.55 

3.68 

3.71

148 

153 

162 

171 

192 

197

May 24

3.98

3.98 

4.02

M

5.28 

5.20

5.06

Ju

5.26 

5.23

5.21

Ju

5.30 

5.25 

5.20

244

244 

253

iy30

579 

555

515

ne 5

567 

558

552

nell

579 

564 

549

June 17

4.74 

4.67 

4.60

424 

405 

387

h^l Discharge

May 19

3.81 

3.88 

3.89 

4.00 

3.99 

4.00

215 

228 

230 

253 

251 

253

May 25

4.14 

4.17 

4.22 

4.28

278 

285 

297 

311

May 31

- 4.96

4.86 

4.83 

4.82

Ju

5.22

5.18 

5.19

Ju

5.18

5.13 

5.09 

5.12

484

456 

448 

445

ne6

552

540 

543

ne!2

543

529

517 

526

June 18

4.55 

4.53 

4.51

374 

369 

364

Gage 

height Discharge

May 20

4.01

4.03 

L4.07

253

257 

266

May 26

4.49 

4.51

4.62

Ju

4.85

4.85 

4.87

364 

369

397

ne 1

454

454 

459

June 7

5.24 

5.25 

5.25

558 

561 

561

June 13

5.17

5.17 

5.16

540

540 

538

June 19

4.44 

4.37 

4.32

346 

328 

316

Gage 

height

Mi

4.08 

4.08

Discharge

iy21

269 

269

May 27

4.68 

4.73 

4.74 

4.75 

4.77 

4.82

413 

426 

429 

432 

437 

451

June 2

4.95

4.99 

5.03 

5.12

Ju

5.28

5.27 

5.28 

5.30

481

492 

503 

529

ne8

570

567 

570 

576

June 14

5.17

5.13 

5.10 

5.08

540

529 

520 

515

June 20

4.30 

4.28 

4.25

311 

306 

299

Gage 

height Discharge

May 22

4.08 

4.06 

4.04

266 

262 

257

May 28

4.91 

4.99 

5.04 

5.12 

5.15 

5.21

Ju

5.16

5.28 

5.32

5.37

Ju

5.35 

5.39 

5.41 

5.41

5.39

473 

495 

509 

532 

540 

558

ne3

538

573 

585

600

ne9

591 

603 

609 

609

603

June 15

5.04 

4.97 

4.94

503 

484 

475

June 21

4.34 

4.27 

4.29 

4.30

4.25

324 

306 

311 

314

301
206 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Valley Creek at Stanley, Idaho

Location.- Lat. 44 0 13', long. 114°56', in sec. 3, T. 10 H., R. 13 E., a quarter of a

mile upstream from mouth, three-eighths of a mile downstream from upper Stanley,

and three-quarters of a mile upstream from lower Stanley. 

Drainage area.- 176 square miles. 

Page-height record.- Staff gage read once daily during high water; three times

weekly at other times. Reading doubtful July 3; no reading June 30, July 21, 23,

25, 26, 28, 30. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

1,160 second-feet and extended to peak stage. Shifting-control method used May 1 to

July 13. Discharge interpolated on days of doubtful or no gage-height record. 

Maxima,.- May-June 1948: Discharge observed, 1,290 second-feet 12=40 p.m. June 3 (gage

height, 3.50 feet).

1910-13, 1921 to April 1948: Discharge observed, 1,850 second-feet May'29, 1921

(gage height, 4.4 feet), from rating curve extended above 1,300 second-feet. 

Remarks.- Diversions above station for irrigation.

Mean discharge, in second-feet, 19&8

Day

1

2

3

4

5

6

7

8

9

10

May

203

173

239

283

196

385

520

319

250

256

June

940

996

1,290

1,120

1,110

1,120

1,140

1,150

1,200

1,150

July

508

474

454

435

380

354

327

315

294

283

Day

11

12

13

14

15

16

17

18

19

20

May

440

457

446

405

362

508

568

670

926

800

June

1,030

989

1,010

947

842

765

751

676

682

622

July

275

260

250

246

236

219

206

196

199

193

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .

Runoff, in inches ................................................................... ........................................................

May

786

800

706

712

835

912

975

1,110

1,210

1,030

912

593

3.89

June

682

664

550

520

502

502

462

440

452

480

ooc

5.24

July

187

181

177

173

167

160

154

152

151

144

138

254

1.67

Gage height, in feet, and discharge, in second-feet, at indicated time, 191$

Hour

3:35p

4:20p

2:20p

3:20p

3p

L0:35a

8:20

L0:35

1:50

Ll:30a

Ll:15a

Gage 

height Discharge

May 17

2.48 568

May 18

2.65

May

3.04

May

2.86

67Q

19

926

20

800

May 21

2.84

May

2.86

May

2.77

2.74

2.70

May

2.73

May

2.91

786

22

800

23

737

718

694

24

712

25

835

Hour

4:30p

ll:15a

4:30p

12:20p

6p

6p

12:10p

3:25p

12:40p

Gage 

height

May

3.02

May

3.11

May

3.28

May

3.41

May

3.18

xMay

3.02

Discharge

26

912

27

975

28

1,110

29

1,210

30

1,030

31

912

June 1

3.06

Jun

3.14

Jun

3.50

940

e 2

996

e 3

1,290

Hour

3:30p

10:35a

lOa

9:45a

12:05p

2:30p

9:15a

ll:45a

2:20p

ll:10p

Gage 

height Discharge

June 4

3.30 1,120

June 5

3.28 1,110

June 6

3.30 1,120

June 7

3.32 1,140

June 8

3.33

3.35

1,150

1,160

June 9

3.40 1,200

June 10

3.34 1,150

June 11

3.18 1,030

June 12

3.13 989

Hour

6.P

8a

M

5p

ll:25a

l:50p

10:20a

2:30p

8a

Gage 

height Discharge

June 13

3.16 1,010

June 14

3.06 947

June 15

2.91 842

June 16

2.80 765

June 17

2.79

June

2.66

751

> 18

676

June 19

2.67

June

2.56

June

2.66

682

 20

622

> 21

682
SALMON RIVER BASIN 207

Yankee Pork Salmon River near Clayton, Idaho

Location.- Lat. 44°17', long. 114°44', in sec. 17, T. 11 N., R. 15 E., half a mile upstream from mouth and 17 miles west of Clayton.

Drainage area.- 195 square miles.

Gage-hetght record.- Water-stage recorder graph except period May 1-8 when there was 

no gage-height record except staff-gage reading on May 4.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

1,710 second-feet and extended to peak stage. Discharge for periods of no gageheight record computed on basis of records for Salmon River below Valley Creek, at 

Stanley, and below Yankee Pork, near Clayton.

Maxima.- May-June 1948: Discharge, 2,260 second-feet 2 a.m. to 3 a.m. May 29 (gage 

height, 5.97 feet).

1921 to April 1948: Discharge, 3,360 second-feet June 12, 1921 (gage height, 

6.79 feet, site and datum then in use), from rating curve extended above 2,300 

second-feet.

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

175

165

165

174

165

220

480

400

299

258

June

1,700

1,920

2,180

2,040

1,890

1,950

2,030

2,000

1,950

 1,740

July

487

466

434

408

378

361

341

321

305

294

Day

11

12

18

14

15

16

17

18

19

20

May

232

225

284

361

424

595

856

1,100

1,320

1,310

June

1,600

1,380

1,330

1,200

1,030

952

823

751

689

685

July

281

271

258

246

236

227

220

213

209

200

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .............. .. ......... .................

Runoff, in inches ................................................................ . . . ....................................................

May

1,160

996

869

1,020

1,510

1,890

2,070

2,140

2,080

1,780

1,540

5.01

June

743

690

636

628

603

572

535

521

504

493

1,192

6.82

July

194

188

182

178

170

165

161

159

159

150

145

258

1.53

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

»Hi

S3

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.98 

3.93 

3.87 

3.89 

4.49 

4.78

782 

755 

724 

734 

1,100 

1,300

May 23

4.17 

4.11 

4.06 

4.04 

4.16 

4.29

888 

854 

826 

815 

882 

960

May 29

5.88 

5.83 

5.70 

5.68 

5.60 

5.62

Ju

5.79 

5.72 

5.65 

5.64 

5.61 

5.63

2,180 

2,140 

2,040 

2-,020 

1,960 

1,980

ne4

2,110 

2,060 

2,000 

1,990 

1,970 

1,980

June 10

5.43 

5.35 

5.30 

5.22 

5.27 

5.30

1,820 

1,760 

1,720 

1,660 

1,700 

1,720

June 16

4.29 

4.17 

4.13

984 

912 

888

Gage 

height Discharge

May 18

4.67 

4.52 

4.40 

4.32 

4.32 

4.62

1,220 

1,120 

1,030 

978 

978 

1,190

May 24

4.28

4.19 

4.23 

4.63 

4.93

M

5.56 

5.42 

5.36 

5.28 

5.25 

5.20

Ju

5.60 

5.51 

5.43 

5.41 

5.51 

5.61

960

906 

930 

1,200 

1,410

iy30

1,930 

1,820 

1,770 

1,700 

1,680 

1,640

ne5

1,960 

1,890 

1,820 

1,810 

1,890 

1,970

June 11

5.23 

5.05 

5.02

1,660 

1,520 

1,500

June 17

4.05 

3.96 

3.94

842 

793 

782

Gage 

height Discharge

May 19

4.66 

4.75 

4.72 

4.85 

5.00 

5.01

1,210 

1,280 

1,260 

1,350 

1,460 

1,470

May 25

4.98

4.96 

4.90 

4.93 

5.28 

5.58

1,460 

1,440 

1,400 

1,420 

1,690 

1,930

May 31

5.12 

5.02 

4.96 

4.97 

5.07 

5.26

Jt

5.65 

5.60 

5.50 

5.47 

5.60 

5.73

1,580 

1,500 

1,460 

1,470 

1,540 

1,690

ne6

2,000 

1,960 

1,880 

1,860 

1,960 

2,060

June 12

4.98

4.83 

4.77

4.77

1,470

1,360 

1,320

1,320

June 18

3.89

3.85 

3.87 

3.86

755

734 

745 

740

Gage 

height Discharge

May 20

4.95 

4.85 

4.70 

4.61 

4.74 

4.79

1,420 

1,350 

1,240 

1,180 

1,270 

1,300

May 26

5.61 

5.47 

5.35 

5.40 

5.66 

5.78

Ju

5.28 

5.23 

5.17 

5.16 

5.39 

5.55

1,960 

1,850 

1,750 

1,790 

2,000 

2,100

ne 1

1,700 

1,660 

1,620 

1,610 

1,790 

1,920

June 7

5.71 

5.71 

5.67 

5.60 

5.67 

5.74

2,050 

2,050 

2,020 

1,960 

2,020 

2,070

June 13

4.83 

4.85

4.75 

4.75

1,360 

1,380

1,300 

1,300

June 19

3.77

3.70 

3.69 

3.79

695

662 

658 

704

Gage 

height Discharge

May 21

4.72 

4.63 

4.52 

4.47 

4.49 

4.50

1,260 

1,190 

1,120 

1,080 

1,100 

1,100

May 27

5.80 

5.72 

5.59 

5.61 

5.83 

5.92

2,120 

2,060 

1,950 

1,970 

2,140 

2,220

June 2

5.57 

5.54 

5.50 

5.45 

5.60 

5.74

1,940 

1,910 

1,880 

1,840 

1,960 

2,070

June8

5.73 

5.70 

5.60 

5/53 

5.65 

5.70

2,06O 

2,040 

1,960 

1,900 

2,000 

2,040

June 14

4.70 

4.50 

4.50

Ju

3.80

3.70 

3.71 

3.77

1,270 

1,130 

1,130

ne20

709

662 

667 

695

Gage 

height Discharge

May 22

4.43 

4.37 

4.34 

4.29 

4.27 

4.25

1,050 

1,010 

990 

960 

948 

936

May 28

5.87 

5.82 

5.78 

5.70 

5.30 

5.95

Ju

5.89 

5.92 

5.88 

5.88 

5.91 

5.88

2,180 

2,140 

2,100 

2,040 

2,120 

2,240

ne3

2,190 

2,220 

2,180 

2,180 

2,210 

2,180

June 9

5.70 

5.63 

5.57 

5.47 

5.53 

5.53

2,040 

1,980 

1,940 

1;860 

1,900 

1,900

June 15

4.37

4.27 

4.30 

4.36

1,040

972 

990 

1,030

June 21

3.87 

3.90 

3.89

3.89

745 

760 

755

755

Supplemental record.- May 29, 2 to 3 a.m., 5.97 ft., 2,260 sec.-ft.; June 3, 

5.96 ft., 2,250"secT::ft.

6 a.m.,
208 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Challis Creek near Challis, Idaho

Location.- Lat. 44°34', long. 114"19', in sec. 2, T. 14 N., R. 18 E., an eighth of a 

 mile downstream from Eddy Creek, 6 miles northwest of Challis, and 6f miles upstream

from mouth.

Drainage area.- 85 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

300 second-feet and extended to peak stage. 

Maxima.- May-June 1948: Discharge, 418 second-feet 2 a.m. and 6 a.m. June 4 (gage

height, 2.30 feet).

1943 to April 1948: Discharge, 388 second-feet May 9, 1947 (gage height, 2.07

feet). 

Remarks.- Diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

27

25

25

25

24

28

42

43

39

38

June

284

317

373

403

380

380

380

384

373

330

July

127

126

118

113

103

100

96

91

86

85

Day

11

12

13

14

15

16

17

18

19

20

May

35

34

37

41

45

56

78

110

137

146

June

313

297

272

245

215

204

189

180

171

163

July

82

81

79

75

72

71

68

67

63

62

Day

21

22

23

24

25

26

27

28

29

80

31

Monthly mean discharge, in second-feet . . . . ..... . .......... .........

Runoff, in inches ............................................ ....................... .......................................................

May

142

142

137

135

152

207

240

288

330

327

294

June

185

167

154

154

150

148

140

135

129

127

245

July

61

58

57

55

53

52

49

52

53

50

47
SALMON RIVER BASIN 209

Panther Creek near Shoup, Idaho

Location.- Lat. 45°19', long. 114°23', in sec. 19, T. 23 N., R. 18 E., 25 feet downstream from bridge on private road, 1 mile upstream from mouth, and 7 miles southwest 

of Shoup.

Drainage area.- 529 square miles.

Gage-height record.- Staff gage read once daily to hundredths.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

1,830 second-feet and extended to peak stage by logarithmic plotting.

Maxima.- May-June 1948: Discharge observed, 2,400 second-feet 9 a.m. May 29 (gage 

height, 4.10 feet).

1944 to April 1948: Discharge observed, 2,500 second-feet May 9, 1947 (gage 

height, 4.20 feet).

Remarks.- Small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

270

225

257

250

311

347

422

438

372

347

June

1,780

1,830

2,200

1,920

1,780

1,740

1,700

1,700

1,570

1,370

July

608

634

608

569

513

522

470

430

430

410

Day

11

12

13

14

15

16

17

18

19

20

May

325

325

372

407

438

559

715

1,030

1,330

1,410

June

1,290

1,140

996

930

897

897

866

744

715

660

July

414

384

361

354

336

318

318

311

311

300

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet.... ...........................................................................

Runoff, in inches .............................................................................................................................

May

1,390

1,410

1,250

1,330

1,530

2,010

2,200

2,200

2,250

1,830

1,830

948

2.07

June

1,140

996

962

930

859

834

715

660

629

608

1,169

2.46

July

290

283

270

270

250

250

238

231

250

250

250

369

0.80

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

6:30p

7:30p

6:15p

6:30p

9:05

10:05

11:40

6:15

7p

7:45p

8p

9:30

7:30

Gage 

height Discharge

May 17

2.00 715

May 18

2.50 1,030

May 19

2.90 1,330

May 20

3.00 1,410

May 21

2.98

3.00

2.98

3.95

1,390

1,410

1,390

1,370

May 22

3.00 1,410

May 23

2.80 1,250

May 24

2.90 1,330

May 25

3.10

3.20

1,490

1,570

Hour

6:30p

7:30p

9:30

7

9

8

6p

6p

7p

7:30p

8p

Gage 

height Discharge

May 26

3.70 2,010

May 27

3.90 2,200

May 28

4.00

3.80

2,300

2,100

May 29

4.10

3.80

Ma

3.50

Ma

3.50

Ju

3.45

Ju

3.50

Ju

3.90

2,400

2,100

y 30

1,830

y 31

1,830

ne 1

1,780

ne 2

1,830

ne 3

2,200

Hour

7:30p

6:30p

?P

6:30p

7p

7:45p

7p

6:30p

10:35

12:15

7

Gage 

height Discharge

June 4

3.60 1,920

June 5

3.45 1,780

June 6

3.40 1,740

June 7

3.35 1,700

June 8

3.35 1,700

June 9

3.20 1,570

June 10

2.95 1,370

June 11

2.85 1,290

June 12

2.70

2.70

2.60

1,170

1,170

1,100

Hour

7:30p

6p

?P

5:30p

7p

5:30p

6:30p

6p

7:30p

Gage 

height Discharge

June 13

2.45 996

June 14

2.35 930

June 15

2.30 897

June 16

2.30 897

June 17

2.25 866

June 18

2.05 744

June 19

2.00 715

June 20

1.90 660

June 21

2.65 1,140
210 FLOODS OP MAY-JUME 1948 IN COLUMBIA RIVER BASIN

Middle Pork Salmon River near Cape Horn, Idaho

Location.- Lat. 44°25', long. 115°11', In sec. 34, T. 13 N., R. 11 E., 1,100 feet downstream from Little Beaver Creek, half a mile downstream from confluence of Marsh and

Beaver Creeks, and 2 miles northwest of Cape Horn. 

Drainage area.- 138 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

1,750 second-feet and extended to peak stage. 

Maxima.- May-June 1948: Discharge, 2,340 second-feet 3 to 4 a.m. June 3 (gage height,

6.26 feet).

1928 to April 1948: Discharge, 2,340 second-feet June 9, 1933, and about May 31,

1943; gage height, 6.26' feet June 9, 1933. 

Remarks.- No diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

147

141

143

143

141

174

261

248

223

212

June

1,730

1,920

2,220

2,020

1,920

1,950

2,010

2,030

2,010

1,830

July

514

496

465

443

398

371

352

337

318

308

Day

11

12

18

14

15

16

17

18

19

20

May

215

229

312

348

402

518

732

974

1,250

1,300

June

1,690

1,520

1,570

1,350

1,210

1,130

1,030

965

889

858

July

301

287

277

267

254

245

238

232

223

220

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... ........... .............. ...................

Runoff, in inches .................................................... ..... .................................................................

May

1,230

1,120

1,110

1,230

1,400

1,600

1,820

2,010

2,020

1,770

1,620

808

6.75

.June

964

856

757

713

674

630

580

551

527

509,

1,287

10.41

July

215

206

201

195

192

187

187

190

190

179

172

279

2.33

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

hi 1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.09 

4.01 

4.02 

4.39 

4.76 

4.69

620 

580 

585 

784 

1,010 

968

May 23

4.74 

4.64 

4.66 

5.01 

5.32 

5.08

1,000 

936 

949 

1,190 

1,430 

1,240

May 29

6.10 

5.97 

5.87 

5.88 

5.94 

5.92

2,160 

2,030 

1,930 

1,940 

2,000 

1,980

June 4

6.05 

5.95 

5.89 

5.87 

5.95 

5.95

2,110 

2,010 

1,950 

1,930 

2,010 

2,010

June 10

5.85 

5.78 

5.73 

5.68 

5.76 

5.76

1,910 

1,840 

1,790 

1,740 

1,820 

1,820

June 16

4.94 

4.90 

4.89

4.88

1,140 

1,110 

1,100

1,100

Gage 

height Discharge

May 18

4.58 

4.48 

4.51 

4.76 

5.00 

4.96

898 

838 

856 

1,010 

1,180 

1,150

May 24

4.85 

4.72 

4.77 

5.28 

5.47 

5.30

M

5.81 

5.72 

5.64 

5.62 

5.68 

5.65

Ju

5.90 

5.83 

5.77 

5.80 

5.93 

5.95

Ju

5.65 

5.55 

5.56

1,080 

988 

1,020 

1,390 

1,550 

1,410

iiy 30

1,870 

1,780 

1,710 

1,690 

1,740 

1,720

ne 5

1,960 

1,890 

1,830 

1,860 

1,990 

2,010

nell

1/720 

1,620 

1,630

June 17

4.75 

4.77 

4.76 

4.71

1,010 

1,020 

1,010 

982

Gage 

height Discharge

May 19

4.94 

4.49 

5.03 

5.23 

5.33 

5.19

1,140 

1,170 

1,200 

1,350 

1,430 

1,320

May 25

5.10 

5.00 

5.04 

5.44 

5.62 

5.55

1,250 

1,180 

1,210 

1,530 

1,690 

1,620

May 31

5.57 

5.49 

5.42 

5.48 

5.66 

5.69

Jl

5.92 

5.85 

5.80 

5.81 

5.96 

6.02

1,640 

1,570 

1,510 

1,560 

1,720 

1,750

ne6

1,980 

1,910 

1,860 

1,870 

2,020 

2,080

June 12

5.45 

5.34 

5.43

1,540 

1,440 

1,520

June 18

4.62 

4.61 

4.75 

4.75 

4.70

923 

916 

. 1,010 

1,010 

975

.^Discharge

May 20

5.00 

4.91 

4.96 

5.24 

5.52 

5.31

1,180 

1,120 

1,150 

1,360 

1,600 

1,420

May 26 '

5.42 

5.34 

5.35 

5.60 

5.77 

5.73

1,510 

1,440 

1,450 

1,670 

1,830 

1,790

June 1

5.66 

5.58 

5.53 

5.61 

5.83 

5.89^

Jl

6.00 

5.95 

5.88 

5.88 

5.98 

6.01

Ju

5.60 

5.56

5.43 

5.39

1,720 

1,650 

1,610 

1,680 

1,890 

1,950

ne 7

2,060 

2,010 

1,940 

1,940 

2,040 

2,070

ne 13

1,670 

1,630

1,520 

1,480

June 19

4.58 

4.50 

4.52

898 

850 

862

Gage 

height Discharge

May 21

5.08 

4.94 

4.96 

5.07 

5.16 

5.11

1,240 

1,140 

1,150 

1,230 

1,300 

1,260

May 27

5.64 

5.56 

5.57 

5.79 

6.05 

^6.07

1,710 

1,630 

1,640 

1,850 

2,110 

2,130

June 2

5.85 

5.78 

5.73 

5.80 

6.04 

6.08

Ju

-5.99 

5.95 

5.90 

5.91 

6.02 

6,06

1,910 

1,840 

1,790 

1,860 

2,100 

2,140

ne8

2,050 

2,010 

1,960 

1,970 

2,080 

2,120

June 14

5.26 

5.15 

5.13

1,380 

1,290 

1,270

June 20

4.47 

4.50 

4.56 

4.59

832 

850 

886 

904

Gage 

height Discharge

May 22

4.96 

4.86 

4.82 

4.89 

4.94 

4.85

1,150 

1,080 

1,050 

1,100 

1,140 

L 1,080

May 28

5.99 

5.87 

5.83 

5.87 

6.05 

6.13

2,050 

1,930 

1,890 

1,930 

2,110 

2,190

June 3

6.26 

6.21 

6.14 

6.11 

6.13 

6.13

Ju

6.03 

5.95 

5.90 

5.86 

5.95 

5.92

2,340 

2,280 

2,200 

2,170 

2,190 

2,190

ne9

2,090 

2,010 

1,960 

1,920 

2,010 

1,980

June 15

5.05

4.97 

5.04 

5.05

1,220

1,160 

1,210 

1,220

June 21

4.59 

4.65 

4.71 

4.76 

4.75 

4.69

904 

942 

982 

1,010 

1,010 

968

Supplemental record.- 6.26 ft., 3 a.m., June 3,2,340 sec.-ft.
SALMON RIVER BASIN 211

Bear Valley Creek near Cape Horn, Idaho

Location.- Lat. 44°26', long. 115°17', In sec. 29, T. 13 N., R. 10 E., 250 feet downstream from Plr Creek, 3 miles upstream from mouth, and 7 miles northwest of Cape 

Horn.

Drainage area.- 180 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

2,250 second-feet and extended to peak stage. Shifting-control method used May 1 to 

July 31.

Maxima.- May-June 1948: Discharge, 2,960 second-feet 7 a.m. May 29 (gage height, 5.15

1921 to April 1948: Discharge, 3,450 second-feet June 9, 1933 (gage height, 5.49 

feet), from rating curve extended above 2,000 second-feet. 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

222

201

208

205

194

229

376

367

330

304

June

1,960

2,080

2,460

2,270

2,100

2,100

2.150

2,140

2,120

1,930

July

467

484

440

420

386

362

348

330

308

296

Day

11

12

13

14

15

16

17

18

19

20

May

296

322

440

544

645

826

1,100

1,360

1,680

1,750

June

1,750

1,600

1,510

1,390

1,300

1,250

1,180

1,040

1,020

906

July

292

292

275

259

248

240

233

225

222

218

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . ..... . .......... .. ...... . .

Runoff, in inches ............................................................................................................................

May

1,750

1,680

1,500

1,670

1,950

2,160

2,190

2,610

2,620

2,230

1,930

7.00

June

1,050

938

786

701

651

609

561

522

489

462

8.48

July

215

205

198

191

188

185

182

185

191

 182

173

272

1.74

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.16

3.16 

3.42 

3.63 

3.58

975

975 

1,170 

1,340 

1,300

May 23

3.74 

3.71 

3.85 

3.93

M

5.01 

5.14 

4.99 

4.76 

4.61 

4.57

- Jt

4.63 

4.59 

4.58 

4.52

4.36

1,440 

1,420 

1,540 

1,610

iy29

2,790 

2,950 

2,770 

2,500 

2,340 

2,290

ne4

2,360 

2,310 

2,300 

2,240

2,060

June 10

4.22 

4.24 

4.33 

4.26

4.08

Ju

3.47 

3.44 

3.44 

3.47 

3.47 

3.46

1,920 

1,940 

2,030 

1,960

1,780

ne!6

1,260 

1,230 

1,230 

1,260 

1,260 

1,250

*£| Discharge

May 18

3.56

3.57 

3.72 

3.86 

3.82

1,280

1,290 

1,410 

1,530 

1,490

May 24

3.99 

4.00 

3.95 

3.92

4.17

Mi

4.66 

4.70 

4.60 

4.43 

4.30 

4.26

Ju

4.34 

4.39 

4.48 

4.45

4.29

1,670 

1,680 

1,630 

1,610

1,840

ly 30

2,390 

2,430 

2,320 

2,140 

2,000 

1,960

ne5

2,040 

2,090 

2,190 

2,160

1,990

June 11

4.03 

4.03 

4.10 

4.11

3.94

1,730 

1,730 

1,800 

1,810

1,650

June 17

3.44 

3.42

3.34 

3.23

1,230 

1,220

1,160 

1,070

Gage 

height Discharge

May 19

3.87 

3.91 

4.00 

4.16 

4.19 

4.13

1,540 

1,580 

1,660 

1,810 

1,840 

1,780

May 25

4.30 

4.37 

4.25 

4.19 

4.24 

4.35

Mi

4.28 

4.31 

4.30

4.12 

4.10

Jl

4.28 

4.39 

4.54 

4.48 

4.38 

4.31

1,980 

2,050 

1,930 

1,870 

1,920 

2,030

iy31

1,480 

2,010 

2,000

1,820 

1,800

ne6

1,980 

2,090 

2,260 

2,190 

2,080 

2,010

June 12

3.90 

3.88 

3.91 

3.91

3.80

1,620 

1,600 

1,620 

1,620

1,530

June 18

3.19 

3.17 

3.16 

3.17

3.21

1,040 

1,030 

1,020 

1,030

1,060

^[Discharge

May 20

3.9.9 

3.96 

4.03 

4.19 

4.25 

4.21

1,650 

1,620 

1,690 

1,840 

1,900 

1,860

May 26

4.55 

4.64 

4.-S2 

4.35 

4.34 

4.42

Ju

4.17 

4.34 

4.42 

4.30 

4.17 

4.14

Ju

4.30 

4.44 

4.60 

4.54 

4.42 

4.34

2,260 

2,360 

2,220 

2,040 

2,030 

2,120

ne 1

1,870 

2,040 

2, ISO 

2,000 

1,870 

1,840

ne7

2,000 

2,150 

2,320 

2,260 

2,130 

2,040

June 13

3.76 

3.75 

3.80 

3.82 

3.80 

3.75

1,490 

1,480 

1,530 

1,540 

1,530 

1,480

June 19

3.23 

3.22 

3.16

3.04

1,060 

1,060 

1,010

924

Gage 

height Discharge

May 21

4.14

4.05 

4.08 

4.04 

4.07

1,800

1,720 

1,740 

1,710 

1,730

May 27

4.53 

4.61 

4.52 

4.38 

4.34 

4.51j

2,250 

2,340 

2,240 

2,080 

2,040 

2,220

June 2

4.22 

4.40 

4.57 

4.49 

4.37 

4.32

Ju

4.31 

4.42 

4.55 

4.52 

4.44 

4.38

1,920 

2,100 

2,290 

2,200 

2,070 

2,020

ne8

2,010 

2,130 

2,270 

2,240 

2,150 

2,080

June 14

3.69 

3.65

3.62 

3.58 

3.52

1,430 

1,400

1,380 

1,350 

1,300

June 20

3.00 

2.99 

2.99 

3.00 

3.04 

3.09

896 

889 

889 

896 

924 

960

Gage 

height

M

4.09

4.03 

3.99

3.89

Discharge

iy22

1,750

1,700 

1,660

1,570

May 28

4.88 

5.15 

5.01 

4.80 

4.66 

4.72

2,630 

2,960 

2,790 

2,540 

2,390 

2,460

Juns3

4.45 

4.68 

4.89 

4.92 

4.85 

4.74

Jl

4.35 

4.42 

4.53 

4.47

4.26

2,160 

2,410 

2,650 

2,680 

2,600 

2,480

ne9

2,050 

2,130 

2,250 

2,180

1,960

June 15

3.49 

3.49 

3.51 

3.56 

3.59 

3.53

Ju

3.20 

3.26 

3.27

3.20

1,270 

1,270 

1,290 

1,330 

1,350 

1,310

ne21

1,040 

1,090 

1,100

1,040
212 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Big Creek near Big Creek, Idaho

Location.- Lat. 45°07', long. 114°55', In sec. 31, T. 21 N., R. 13 E. , l£ miles downstream from Cabin Creek, 2 miles southeast of Wallace Ranch, and 9f miles east of

Big Creek post office. 

Drainage area.- 470 square miles. 

Sage-height record.- Staff gage read once dally. 

Discharge record. -^"Stage-discharge relation defined by current-meter measurements below

2,840 second-feet and extended to peak stage by logarithmic plotting. 

Maxima.- May-June 1948: Discharge, 5,800 second-feet June 3 (gage height, 7.12 feet,

from floodmark).

1944 to April 1948: Discharge observed, 4,010 second-feet May 9, 1947 (gage

height, 5.8 feet). 

Remarks.- Small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

525

497

506

478

534

573

950

1,010

798

719

June

4,230

4,920

5,480

4,360

3,960

4,260

4,110

4,520

4,160

3,600

July

1,390

1,380

1,290

1,140

1,120

1,140

1,010

856

764

697

Day

11

12

13

14

15

16

17

18

19

20

May

687

665

891

926

998

1,210

1,620

2,400

2,780

2,980

June

3,110

2,880

2,880

2,830

2,540

2,380

2,160

2,020

2,060

2,110

July

676

676

644

613

613

613

573

597

487

469

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

2,680

2,310

2,400

2,380

3,130

3,650

4,130

4,680

4,920

4,030

3,420

4.71

June

2,110

1,930

1,890

1,740

1,680

1,630

1,440

1,380

1,360

1,440

6.74

July

460

460

425

434

421

404

404

400

391

400

412

1.69

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

3:15p

N

2p

ll:20a

4:15p

9:20a

9:45a

3:10p

lla

Gage 

height Discharge

May 17

3.42 1,620

May 18

4.32 2,400

May 19

4.70 2,780

May 20

4.90 2,980

May 21

4.60

Maj

4.22

2,680

r 22

2,310

May 23

4.32

Maj

4.30

Mas

5.04

2,400

r 24

2,380

r 25

3,130

Hour

ll:30a

10:30a

lla

12:30p

Sp

10:20a

2:10p

lOa

5:15p

Gage 

height

May

5.50

May

5.90

May

6.32

May

6.50

May

5.82

May

5.30

Discharge

26 '

3,650

27

4,130

28

4,680

29

4,920

30

4,030

31

3,420

June 1

5.98

Jun

-6.50

Jun

6.90

4,230

e 2

4,920

e 3

5,480

Hour

4:10p

3p

10:45a

9:15a

N

l:15p

2:10p

3:15p

6:30p

Gage 

height Discharge

June 4

6.08 4,360

June 5

5.76 3,960

June 6

6.00 4,260

June 7

5.88 4,110

June 8

6.20

Ju

5.92

4,520

ne 9

4,160

June 10

5.46

Jun

5.02

Jun

4.80

3,600

e 11

3,110

e 12

2,880

Hour

10:40a

8:30a

10:05a

2:45p

6:30p

5:40p

6p

3:10p

3:20p

l:10p

Gage 

height Discharge

June 13

4.80 2,880

June 14

4.80

4.70

2,880

2,780

June 15

4.46 2,540

June 16

4.30 2,380

June 17

4.06

Jun

3.90

Jun

3.94

2,160

5 18

2,020

5 19

2,060

June 20

4.00

Jun

4-. 00

2,110

5 21

2,110
SALMON RIVER BASIN 213

South Pork Salmon River near Knox, Idaho

Location.- Lat. 44 0 39', long. 115°42', in NWj see. 11,,T. 15 N., R. 6 E., 800 feet 

downstream from Curtis Creek, 1 mile upstream from Warm Lake Creek, 1-| miles southwest of'Knox, and 21 miles northeast of Cascade.

Drainage area.- 92 square miles.

Gage-height "record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

1,150 second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge, 1,330 second-feet 10:40 p.m. May 27 (gage height,

1928 to April 1948: Discharge observed, 1,560 second-feet June 9, 1933 (gage 

height, 4.69 feet, site and datum then in use), from rating curve extended above 

1,000 second-feet. 

Remarks.- No diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

186

172

184

202

195

271

398

342

280

263

June

998

1,100

1,260

1,160

1,140

1,150

1,150

1,150

1,100

1,010

July

254

224

202

186

172

164

157

149

142

138

Day

11

12

13

14

15

16

17

18

19

20

May

260

271

391

406

428

522

674

769

974

911

June

913

807

763

681

630

569

517

489

463

457

July

140

132

126

122

116

114

110

108

110

106

Day

21

22

23

24

25

26

27

28

29

SO

31

Monthly mean discharge, in second-feet .............................. .................................................

Runoff, in inches ............................................................................................................................

May

863

974

861

871

985

1,090

1,210

1,230

1,180

1,020

952

7.82

June

508

424

377

342

312

286

266

249

23£

222

691

8.38

July

103

97

93

90

86

83

84

93

SO

83

79

1.60

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

« 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.65 

4.58 

4.53 

4.69 

4.94 

4.99

647 

615 

593 

665 

787 

812

May 23

5.13 

5.05 

4.99 

5.02 

5.14 

5.17

Mi

5.88 

5.77 

5.69 

5.62 

5.60 

5.61

882 

842 

812 

827 

887 

902

iy29

1,270 

1,210 

1,160 

1,130 

1,120 

1,120

June 4

5.74 

5.68 

5.58 

5.56 

5.69 

5.77

1,190 

1,160 

1,110 

1,103 

1,160 

1,210

June 10

5.54 

5.38 

5.27 

5.21 

5.33 

5.43

1,090 

1,010 

952 

922 

983 

1,040

June 16

4.55 

4.49 

4.45 

4.40 

4.40 

4.45

602 

576 

559 

538 

538 

559

Gage 

height Discharge

May 18

4.89 

4.82 

4.78 

4.84 

5.04 

6.11

Mi

5.09 

5.00 

4.94 

5.04 

5.30 

5.38

762 

728 

708 

738 

837 

872

iy24

862 

817 

787 

837 

967 

1,010

May 30

5.53 

5.43 

5.35 

5.31 

5.34 

5.39

Ju

5.72 

5.64 

5.50 

5.50 

5.69 

5.76

Ju

'5.33 

5.20 

5.11 

5.08 

5.12 

5.17

1,080 

1,040 

994 

972 

988 

1,010

ne 5

1,180 

1,140 

1,070 

1,070 

1,160 

1,200

nell

983 

917 

872 

857 

877 

902

June 17

4.39 

4.34 

4.30 

4.30 

4.37 

4.34

534 

513 

497 

497 

526 

513

Gage 

height Discharge

May 19

5.21 

5.39 

5.35 

5.32 

5.39 

5.35

Mi

5.30 

5.20 

5.13 

5.2-7 

5.51 

5.71

922 

1,010 

994 

978 

1,010 

994

iy25

967 

917 

882 

952 

1,080 

1,180

May 31

5.33 

5.24 

5.17 

5.17 

5.31 

5.41

Ju

5.72 

5.65 

5.52 

5.52 

5.73 

5.85

983 

937 

902 

902 

972 

1,020

ne6

1,180 

1,140 

1,080 

1,080 

1,190 

1,250

June 12

5.07 

4.98 

4.90 

4.85 

4.98 

5.02

852 

807 

767 

7*2 

807 

827

June 18

4.28 

4.24 

4.21 

4.22 

4.35 

4.35

489 

474 

462 

466 

518 

518

Gage 

height Discharge

May 20

5.25 

5.15 

5.08 

5.10 

5.24 

5.27

942 

892 

857 

867 

937 

952

May 26

5.62 

5.44 

5.36 

5.44 

5.70 

5.80

1,130 

1,040 

999 

1,040 

1,170 

1,220

June 1

5.38 

5.29 

5.22 

5.24 

5.47 

5.70

Ju

5.75 

5.68 

5.53 

5.53 

5.71 

5.76

1,010 

962 

927 

937 

1,060 

1,170

ne 7

1,200 

1,160 

1,080 

1,080 

1,180 

1,200

June 13

4.97 

4.90 

4.84 

4.82 

4.87 

4.88

802 

767 

738 

728 

752 

757

June 19

4.27 

4.20 

4.16 

4.13 

4.16 

4.29

485 

458 

443 

431 

443 

493

Gage 

height Discharge

May 21

5.17 

5.09 

5.00 

5.00 

5.07 

5.17

902 

862 

817 

817 

852 

902

May 27

5.77 

5.72 

5.64 

5.72 

5.88 

5.97

1,210 

1,180 

1,140 

1,180 

1,270 

1,320

June 2

5.66 

5.50 

5.42 

5.40 

5.63 

5.77

Ju

5.72 

5.67 

5.57 

5.55 

5.70 

5.75

Ju

4.81 

4.74 

4.67 

4.62 

4.69 

4.72

1,150 

1,070 

1,030 

1,020 

1,140 

1,210

ne8

1,180 

1,160 

1,100 

1,100 

1,170 

1,200

ne 14

723 

689 

656 

633 

665 

680

June 20

4.20 

4.14 

4.10 

4.12 

4.27 

4.39

458 

435 

420 

428 

485 

534

Gage 

height

M

5.37 

5.34 

5.30 

5.36 

5.32 

5.. 22

Discharge

»y22

1,000 

988 

967 

999 

978 

927

May 28

5.88 

5.80 

5.74 

5.74 

5.80 

5.94

1,270 

1,220 

1,190 

1,190 

1,220 

1,300

June 3

5.82 

5.92 

5.94 

5.83 

5.82 

5.80

1,240 

1,290 

1,300 

1,240 

1,240 

1,220

June 9

5.70 

5.55 

5.42 

5.40 

5.58 

5.70

1,170 

1,100 

1,030 

1,020 

1,110 

1,170

June 15

4.68 

4.63 

4.55 

4.52 

4.60 

t.65

661 

638 

602 

589 

624 

647

June 21

4.32 

4.30 

4.31 

4.35 

4.34 

4.28

505 

497 

501 

518 

513 

489

Supplemental record.- May 25, 10 p.m., 5.69 ft., 1,160 sec.-ft.; May 26, 

ft., 1,080 sec.-ft.; May 27, 10:40 p.m., 5.99 ft., 1,330 sec.-ft.; June 3,

5 a.m., 5.52

ii.., j.,uo'_> sec.-it.; nay c.i, iu:*u p.m., o.aa it., i,oou seu.-iu.; ouiie o, 10 a.m., 

5.97 ft., 1,320 sec..-ft.; June 9, 10 p.m., 5.70 ft., 1,170 sec.-ft.; June 18, 10 p.m., 

4.40 ft., 538 sec.-ft.; June 19, 10 p.m., 4.29 ft., 493 sec.-ft.
FLOODS OF HAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Johnson Creek near Landmark ranger station, Idaho

Location.- Lat. 44°41', long. 115°33', In sec. 51, T. 16 N., R. 8 E., 0.5 mile down-

 stream from Bob Cat Creek, 0.8 mile upstream from Lunch Creek, If miles north of 

Landmark ranger station, and 20 miles south of Yellow Pine.

Drainage area.- 54.7 square miles.

Gage-height record.- Water-stage recorder graph except 12:30 p.m. June 9 to 12:30 p.m. 

June 15 when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

1,000 second-Teet and extended to peak stage. Stage-discharge relation affected by 

ice May 1. Discharge for period of no gage-height record computed on basis of recorded range in stage and records for station at Yellow Pine. Shifting-control 

method used May 26-29, June 3, June 20 to July 31.

Maxima.- May-June 1948: Discharge, 1,510 second-feet 11 p.m. May 27 (gage height, 5.95

1942 to April 1948: Discharge, 1,240 second-feet May 8, 9, 1947 (gage height, 

5.62 feet).

Remarks.- During late fall of 1936, the Bureau of Reclamation cut a transmountaln canal 

to divert a small flow from a tributary of Johnson Creek to Deadwood River Basin to 

supplement storage in Deadwood Reservoir. Discharge measurement of July 16 Indicated 

flow in this canal of 6.05 second-feet.

Mean discharge, in seconds-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

72

69

70

68

72

88

132

138

127

119

June

927

1,010

1,180

949

896

894

881

850

796

700

July

176

155

134

118

110

100

93

86

82

75

Day

11

12

13

14

15

16

17

18

19

20

May

119

129

165

174

196

266

382

508

672

714

June

640

560

540

470

410

383

349

325

314

299

July

77

75

69

63

60

56

53

52

53

52

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet..... ... ......................................................

Runoff, in inches ...................................................... .. ..................................................................

May

716

674

637

737

902

998

1,120

1,240

1,140

925

850

459

9.67

June

355

289

252

226

210

194

181

165

155

148

518

10.57

July

48

44

42

40

39

36

39

49

44

39

36

70.8

1.49

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

,Sja| Discharge

May 17

3.59 

3.55 

3.51 

3.66 

3.95 

4.04

349 

336 

323 

372 

476 

510

May 23

4.31 

4.23 

4.21 

4.30 

4.50 

4.55

M:

5.65 

5.29 

5.07 

5.02 

5.08 

5.14

623 

587 

578 

618 

715 

742

iy29

1,270 

1,210 

1,060 

' 1,020 

1,060 

1,100

June 4

5.07 

4.95 

4.84 

4.76 

4.78 

4.90

1,060 

978 

908 

859 

871 

945

June 10

June 16

3.74 

3.71 

3.68 

3.64 

3.66 

3.67

400 

390 

379 

366 

372 

376

Gage 

height Discharge

May 18

4.00 

3.96 

3.92 

3.99 

4.17 

4.27

494 

479 

464 

490 

562 

605

May 24

4.46 

4.37 

4.35 

4.48 

4.80 

4.91

695 

651 

642 

705 

883 

952

May 30

5.05 

4.89 

4.78 

4.72 

4.77 

4.83

Ju

4.96 

4.38 

4.77 

4.68 

4.72 

4.89

1,040 

939 

871 

836 

865 

902

ne 5

984 

933 

865 

813 

836 

939

June 11

June 17

3.65 

3.62 

3.58 

3.55 

3.54 

3.53

369 

359 

346 

336 

333 

330

Gage 

height Discharge

May 19

4.26 

4.32 

4.38 

4.48 

4.59 

4.57

600 

627 

656 

705 

763 

752

May 25

4.79 

4.66 

4.66 

4.75 

5.05 

5.17

M:

4.80 

4.71 

4.63 

4.63 

4.78 

4.96

877 

802 

802 

854 

1,040 

1,120

iy31

883 

830 

785 

785 

871 

984

June 6

4.96 

4.88 

4.77 

4.68 

4.71 

4.88

984 

933 

865 

813 

830 

933

June 12

June 18

3.51 

3.48 

3.47 

3.48 

3.58 

3.60

323 

314 

311 

314 

346 

352

Gage 

height Discharge

May 20

4.50 

4.42 

4.40 

4.43 

4.61 

4.65

715 

675 

665 

680 

774 

796

May 26

5.02 

4.87 

4.82 

4.82 

5.14 

5.55

1,020 

926 

895 

895 

1,100 

1,190

June 1

4.96 

4.85 

4.73 

4.71 

4.88 

5.18

Ju

4.95 

4.87 

4.75 

4.67 

4.68 

4.80

984 

914 

842 

830 

933 

1,130

ne7

978 

926 

854 

807 

813 

883

June 13

June 19

3.57 

3.50 

3.46 

3.42 

3.41 

3.43

342 

320 

308 

295 

292 

298

Gage 

height Discharge

May 21

4.58 

4.48 

4.41 

4.44 

4.49 

4.54

757 

705 

670 

685 

710 

736

May 27

5.13 

4.95 

4.87 

5.02 

5.79 

5.92

1,100 

978 

926 

1,020 

1,380 

1,480

June 2

5.18 

5.01 

4.87 

4.80 

4.89 

5.23

Ju

4.85 

4.81 

4.73 

4.66 

4.64 

4.74

1,130 

1,020 

926 

883 

939 

1,170

ne8

914 

889 

842 

802 

790 

848

June 14

*

June 20

3.41 

3.38 

3.38 

3.40 

3.47 

3.56

295 

286 

286 

292 

314 

342

Gage 

height Discharge

May 22

4.47 

4.42 

4.35 

4.37 

4.42 

4.39

700 

675 

642 

651 

675 

650

May 28

5.70 

5.58 

5.13 

5.18 

5.66 

5.79

1,310 

1,220 

1,100 

1,130 

1,280 

1,380

June 3

5.60 

5.64 

5.59 

5.23 

5.14 

5.12

Ju

4.79 

4.73 

4.64

1,230 

1,260 

1,220 

1,170 

1,100 

1,090

ne9

877 

842 

790

June 15

3.78 

3.73 

3.73 

3.76

414 

396 

396 

407

June 21

3.60 

3.61 

3.62 

3.62 

3.60 

3.54

355 

359 

362 

362 

355 

336

Supplemental record.- May 27, 11 p.m., 5.95 ft., 1,510 sec.-ft.; June 2, 2 a.m., 

ft.,1,170 sec.-ft.
SALMON RIVER BASIN 215

Johnson Creek at Yellow Pine, Idaho

Location.- Lat. 44°58', long. 115°30', in NE£ sec. 29, T. 19 N., R. 8 E., 700 feet upstream from mouth and a quarter of a mile southwest of Yellow Pine post office. 

Drainage area.- 213 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

3,l6o. second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge, 4,620 second-feet 11:30 p.m. May 27 (gage height, 

 TOT feet).

1928 to April 1948: Discharge, 5,150 second-feet June 9, 1933 (gage height, 7.62

feet), from rating curve extended above 2,800 second-feet. 

Remarks.- Small diversion, from Johnson Creek Basin to Deadwood River Basin (see Remarks

for station near Landmark ranger station).

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

 7

8

9

10

May

307

285

296

300

289

367

570

570

496

454

June

3,040

3,420

4,070

3,280

3,270

3,480

3,520

3,450

3,240

2,890

July

861

759

671

610

560

515

501

450

427

405

Day

11

12

13

14

15

16

17

18

19

20

May

450

468

655

710

759

969

1,340

1,660

2,200

2,160

June

2,610

2,280

2,230

1,960

1,820

1,650

1,500

1,420

1,390

1,320

July

401

388

359

338

311

292

278

271

271

264

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet

Runoff, in inches ............................................................................................................................

May

2,090

2,040

1,840

2,050

2,580

2,990

3,460

3,920

3,610

2,910

2,720

1,468

7.95

June

1,480

1,280

1,140

1,060

981

915

855

814

776

748

2,063

10.81

July

250

237

224

215

208

202

205

244

237

212

193

365

1.98

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.83 

3.74 

3.64 

3.71 

4.22 

4.44

Ms

4.58 

4.44 

4.35 

4.35 

4.63 

4.75

Mi

6.71 

6.30 

5.92 

5.80 

5.96 

5.98

Ju

6.09 

5.86 

5.70 

5.68 

5.91 

6.06

1,300 

1,230 

1,160 

1,210 

1,600 

1,780

iy23

1,900 

1,780 

1,700 

1,700 

1,950 

2,060

iy29

4,240 

3,750 

3,290 

3,160 

3,340 

3,370

ne 4

3,500 

3,230 

3,050 

3,030 

3,280 

3,460

June 10

5.74 

5.55 

5.36 

5.28 

5.61 

5.65

3,090 

2,880 

2,680 

2,590 

2,950 

3,000

June 16

4.42 

4.32 

4.23 

4.17 

4.17 

4.25

1,760 

1,680 

1,600 

1,560 

1,560 

1,620

hGe?$t | Discharge

May 18

4.35 

4.22 

4.10 

4.12 

4.48 

4.66

1,700 

1,600 

1,500 

1,520 

1,810 

1,970

May 24

4.68 

4.57 

4.45 

4.55 

5.11 

5.36

M

5.84 

5.63 

5.42 

5.33 

5.49 

5.58

Ju

5.94 

5.77 

5.60 

5.68 

6.18 

6.33

Ju

5.47 

5.29 

5.15 

5.12 

5.28 

5.28

1,990 

1,890 

1,780 

1,880 

2,410 

2,680

*y30

3,200 

2,970 

2,740 

2,640 

2,820 

2,920

ne 5

3,320 

3,130 

2,940 

3,030 

3,610 

3,790

nell

2,800 

2,600 

2,450 

2,420 

2,590 

2,590

June 17

4.18 

4.10 

4.05 

4.04 

4.08 

4.10

1,560 

1,500 

1,460 

1,460 

1,480 

1,500

Gage 

height Discharge

May 19

4.66 

4.76 

4.89 

4.96 

5.16 

5.15

1,970 

2,060 

2,190 

2,260 

2,460 

2,450

May 25

5.26 

5.05 

4.90 

5.03 

5.72 

5.88

2,570 

2,350 

2,200 

2,330 

3,070 

3,250

May 31

5.48 

5.32 

5.16 

5.20 

5.58 

5.76

2,810 

2,630 

2,460 

2,500 

2,920 

3,120

June 6

6.16 

5.93 

5.73 

5.74 

6.44 

6.50

3,580 

3,310 

3,080 

3,090 

3,920 

3,990

June 12

5.11 

4.98 

4.84 

4.76 

5.00 

5.07

2,410 

2,280 

2,140 

2,060 

2,300 

2,370

June 18

4.03 

3.96 

3.90 

3.90 

4.08 

4.12

1,450 

1,400 

1,350 

1,350 

1,480 

1,520

Gage 

height Discharge

May 20

5.00 

4.78 

4.66 

4.67 

4.95 

5.07

2,300 

2,080 

1,970 

1,980 

2,250 

2,370

May 26

5.76 

5.51 

5.31 

5.41 

5.89 

6.17

3,120 

2,840 

2,620 

2,730 

3,260 

3,590

June 1

5.72 

5.53 

5.33 

5.41 

6.13 

6.28

3,070 

2,860 

2,640 

2,730 

3,550 

3,730

June 7

6.20 

6.00 

5.78 

5.83 

6.41 

6.40

3,630 

3,390 

3,140 

3,190 

3,880 

3,870

June 13

5.02 

4.95 

4.85 

4.82 

4.92 

4.92

2,320 

2,250 

2,150 

2,120 

2,220 

2,220

June 19

4.04 

3.95 

3.87 

3.82 

3.90 

3.99

1,460 

1,390 

1,330 

1,290 

1,350 

1,420

Gage 

height Discharge

May 21

4.98 

4.80 

4.65 

4.63 

4.73 

4.80

2,280 

2,100 

1,960 

1,950 

2,040 

2,100

May 27

5.99 

5.74 

5.53 

5.75 

6.71 

6.99

3,380 

3,090 

2,860 

3,100 

4,240 

4,600

June 2

6.12 

5.89 

5.66 

5.70 

6.36 

6.50

3,530 

3,260 

3,010 

3,050 

3,820 

3,990

x June 8

6.16 

5.98 

5.81 

5.79 

6.21 

6.25

3,580 

3,370 

3,170 

3,150 

3,640 

3,690

June 14

4,80 

4.66 

4.56 

4.49 

4.58 

4.64

2,100 

1,970 

1,880 

1,820 

1,900 

1,960

June 20

3.90 

3.82 

3.77 

3.73 

3.88 

4.06

1,350 

1,290 

1,250 

1,230 

1,340 

1,470

Gage 

height Discharge

May 22

4.80 

4.79 

4.70 

4.66 

4.68 

4.66

2,100 

2,090 

2,010 

1,970 

1,990 

1,970

May 28

6.73 

6.32 

5.99 

6.08 

6.62 

6.85

4,270 

3,770 

3,380 

3,490 

4,130 

4,420

June 3

6.53 

6.76 

6.68- 

6.50 

6.47 

6.35

4,030 

4,300 

4,210 

3,990 

3,950 

3,810

June 9

6.02 

5.83 

5.63 

5.60 

5.99 

5.96

3,410 

3,190 

2,970 

2,940 

3,380 

3,340

June 15

4.57 

4.50 

4.41 

4.35 

4.49 

4.51

1,890 

1,830 

1,750 

1,700 

1,820 

1,840

June 21

4.07 

4.08 

4.08 

4.09 

4.10 

4.04

1,480 

1,480 

1,480 

1,490 

1,500 

1,460
216 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

	Johnson Creek at Yellow Pine, Idaho Continued 

Supplemental record:

May 17, 2 p.m., 3.62 ft., 1,150 sec.-ft.

18. 2 p.m., 4.08 ft., 1,480 sec.-ft.

19. 6 a.m., 4.68 ft., 1,990 sec.-ft.; 10 a.m., 4.88 ft., 2,180 sec.-ft.;' 

10 p.m., 5.18 ft., 2,480 sec.-ft.

21. 2 p.m., 4.60 ft., 1,920 sec.-ft.

22. 2 a.m., 4.83 ft., 2,130 sec.-ft.

26. 2 p.m., 5.28 ft., 2,590 sec.-ft.

27. 1 p.m., 5.51 ft., 2,840 sec.-ft.; 11:30 p.m., 7.01 ft., 4,620 sec.-ft.

31, 2 p.m., 5.13 ft., 2,430 sec.-ft.

June 1, 2 p.m., 5.29 ft., 2,600 sec.-ft.

2. 2 p.m., 5.60 ft., 2,940 sec.-ft.; 9 p.m., 6.46 ft., 3,940 sec.-ft.

3. 9 a.m., 6.78 ft., 4,330 sec.-ft.

4. 2 p.m., 5.64 ft., 2,980 sec.-ft.; 11 p.m., 6.04 ft., 3,440 sec.-ft.

5. 2 p.m., 5.56 ft., 2,900 sec.-ft.

6. 2 p.m., 5.66 ft., 3,010 sec.-ft.; 10 p.m., 6.56 ft., 4,060 sec.-ft.

7. 2 p.m., 5.73 ft., 3,080 sec.-ft.; 10 p.m., 6.46 ft., 3,940 sec.-ft.

8. 2 p.m., 5.75 ft., 3,100 sec.-ft.; 10 p.m., 6.31 ft., 3,760 sec.-ft.

9. 2 p.m., 5.56 ft., 2,900 sec.-ft.; 10 p.m., 6.04 ft., 3,440 sec.-ft.

10. 3'p.m., 5.26 ft., 2,570 sec.-ft.; 10 p.m., 5.68 ft., 3,030 sec.-ft.

11. 10 p.m., 5.32 ft., 2,630 sec.-ft.

13, 10 p.m., 4.95 ft., 2,250 sec.-ft.

19, 10 p.m., 4.01 ft., 1,430 sec.-ft.
SALMON RIVER BASIN 217

Secesh River near Burgdorf, Idaho

Location.- Lat. 45°14', long. 1150 49', in N£ sec. 23, T. 22 N., R. 5 E., at highway

hl"idge l£ miles upstream from Long Gulch Creek and 5^ miles southeast of Burgdorf. 

Drainage area.- 102 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

970 second-feet and extended to peak stage on basis of slope-area measurement.

Shifting-control method used May 26 to June 2. 

Maxima.- May-June 1948: Discharge, 2,500 second-feet 7:40 a.m. June 3 (gage height,

8.24 feet), by slope-area method.

1943 to April 1948: Discharge, 1,580 seconi-feet May 7, 1947 (gage height, 7.12

feet), from rating curve extended above 1,000 second-feet. 

Remarks , - No regulation or appreciable diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

212

194

194

183

176

245

347

312

264

237

June

1,550

1,630

2,080

1,610

1,540

1,580

1,620

1,650

1,580

1,570

July

614

539

483

436

407

374

352

329

302

287

Day

11

12

13

14

15

16

17

18

19

20

May

234

253

331

354

397

530

760

917

1,080

1,080

June

1,460

1,340

1,390

1,310

1,260

1,230

1,120

1,060

1,010

990

July

284

266

247

233

221

209

197

197

205

204

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet................... . ........................................................

Runoff, in inches............................................................................................................................

May

1,100

1,240

1,210

1,310

1,420

1,500

1,590

1,640

1,660

1,530

1,490

774

8.75

June

1,140

976

849

805

761

700

660

632

605

587

1,210

13.23

July

180

165

156

151

144

140

144

179

191

156

140

262

2.96

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

*H

i

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.64 

5.56 

5.53 

5.89 

6.18 

6.14

677 

637 

623 

810 

977 

953

May 23

6.42 

6.36 

6.35 

6.60 

6.85 

6.79

Mi

7.41 

7.36 

7.29 

7.26 

7.27 

7.25

1,130 

1,090 

1,080 

1,250 

1,420 

1,370

iy29

1,730 

1,690 

1,630 

1,610 

1,620 

1,600

June 4

7.48 

7.40 

7.34 

7.30 

7.35 

7.39

1,710 

1,610 

1,540 

1,500 

1,560 

1,600

June 10

7.49 

7.38 

7.30 

7.25 

7.30 

7.37

Ju

7.10 

7.04 

6.98 

6.96 

6.95 

6.97

1,720 

1,590 

1,500 

1,450 

1,500 

1,580

ne!6

1,310 

1,260 

1,200 

1,190 

1,180 

1,200

£& \ Discharge

May 18

6.04 

5.93 

5.90 

6.09 

6.31 

6.22

894 

832 

815 

923 

1,060 

1,000

May 24

6.65 

6.53 

6.47 

6.69 

6.95 

6.93

M

7.20 

7.15 

7.09 

7.09 

7.17 

7.19

Ju

7.36 

7.30 

7.25 

7.25 

7.41 

7.49

1,280 

1,200 

1,160 

1,310 

1,480 

1,470

iy30

1,560 

1,520 

1,480 

1,480 

1,540 

1,550

ne5

1,570 

1,500 

1,450 

1,450 

1,620 

1,720

June 11

7.35 

7.28 

7.23 

7.19 

7.19 

7.22

1,560 

1,480 

1,430 

1,390 

1,390 

1,420

June 17

6.95 

6.90 

6.85 

6,84 

6.84 

6.85

1,180 

1,140 

1,100 

1,090 

1,090 

1,100

Gage 

height Discharge

May 19

6.13 

6.23 

6.37 

6.48 

6.52 

6.43

947 

1,010 

1,100 

1,170 

1,190 

1,1'40

. May 25

6.83 

6.72 

6.66 

S.85 

7.08 

7.04

1,400 

1,330 

1,290 

1,420 

1,580 

1,550

May 31

7.16 

7.09 

7.01 

7.00 

7.15 

7.25

Ju

7.41 

7.34 

7.27 

7.27 

7.43 

7.53

Ju

7.21 

7.15 

7.09 

7.04 

7.08 

7.15

1,530 

1,480 

1,420 

1,420 

1,520 

1,600

ne6

1,620 

1,540 

1,470 

1,470 

1,650 

1,770

ne!2

1,410 

1,360 

1,300 

1,260 

1,290 

1,360

June 18

6.85 

6.81 

6.75 

6.74 

6.79 

6.81

1,100 

1,070 

1,020 

1,020 

1,050 

1,070

Gage 

height Discharge

May 20

6.30 

6.20 

6.15 

6.36 

6.54 

6.50

1,050 

989 

959 

1,090 

1,210 

1,180

May 26

6.97 

6.90 

6.84 

6.94 

7.22 

7.29

1,500 

1,450 

1,410 

1,480 

1,580 

1,630

June 1

7.21 

7.12 

7.05 

7.09 

7.28 

7.38

Jl

7.46 

7.38 

7.32 

7.29 

7.44 

7.60

1,570 

1,500 

1,450 

1,480 

1,620 

1,710

ne 7

1,680 

1,590 

1,520 

1,490 

1,660 

1,850

June 13

7.23 

7.24 

7.18 

7.11 

7.18 

7.23

1,430 

1,440 

1,380 

1,320 

1,380 

1,430

June 19

6.79 

6.74 

6.69 

6.66 

6.68 

6.73

1,050 

1,020 

983 

962 

976 

1,010

Gage 

height Discharge

May 21

6.37 

6.26 

6.21 

6.41 

6.52 

6.52

1,100 

1,030 

995 

1,130 

1,190 

1,190

May 27

7.22 

7.15 

7.10 

7.20 

7.36 

7.42

1,580 

1,520 

1,480 

1,560 

1,690 

1,740

June 2

7.32 

7.23 

7.17 

7.19 

7.37 

7.50

1,660 

1,580 

1,540 

1,550 

1,700 

1,820

June 8

7.52 

7.42 

7.36 

7.34 

7.41 

7.48

1,750 

1,630 

1,570 

1,540 

1,620 

1,710

June 14

7.20 

7.13 

7.07 

7.02 

7.03 

7.09

1,400 

1,340 

1,280 

1,240 

1,250 

1,300

June 20

6.73 

6.67 

6.63 

6,65 

6.75 

6.83

1,010 

969 

941 

955 

1,020 

1,080

Gage 

height

M:

6.67 

6.67 

6.59 

6.56 

6.55 

6.47

Discharge

iy22

1,300 

1,300 

1,240 

1,220 

1,220 

1,160

May 28

7.34 

7.27 

7.21 

7.25 

7.35 

7.38

1,670 

1,620 

1,570 

1,600 

1,680 

1,710

June 3

7.59 

8.24 

7.87 

7.73 

7.66 

7.59

Jl

7.43 

7.36 

7.29 

7.26 

7.39 

7.52

1,910 

2,500 

2,210 

2,020 

1,930 

1,840

ne9

1,650 

1,570 

1,490 

1,460 

1,600 

1,750

June 15

7.10 

7.09 

7.03 

6.98 

7.01 

7.08

1,310 

1,300 

1,250 

1,200 

1,230 

1,290

June 21

6.85 

6.87 

6.92 

6.96 

6.92 

6.84

1,100 

1,120 

1,160 

1,190 

1,160 

1,090

Supplemental record.- June 3, 3 a.m., 7.50 ft., 1,820 sec.-ft., 6 a.m., 7.99 ft., 

2,410 sec.-ft., 9 a.m., 7.66 ft., 2,190 sec.-ft.

824933 O - 49 - 16
218 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Warren Creek near Warren, Idaho

Location.- Lat. 45°17 f , long. 115°42', In sec. 3, T. 22 N., R. 6 K., 30 feet downstream 

from bridge on Warren-McCall road, a tenth of a mile downstream from Steamboat Creek, 

and 1.3 miles northwest of Warren.

Drainage area.- 37 square miles.

Gage-height record.- Water-stage recorder graph prior to May 25; staff gage at site 75 

feet downstream read once dally thereafter except periods May 26 to June 11, June 23 

to July 5, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

490 second-feet and extended to peak stage on basis of slope-area measurement. Discharge for periods of no gage-height record computed on basis of records for Secesh 

River near Burgdorf and Johnson Creek at Yellow Pine. Shifting-control method used 

May 1-25.

Maxima.- May-June 1948: Discharge, 1,100 second-feet June 3 (gage height, 5.3 feet, 

from floodmarks), by slope-area method. ,

1943 to April 1948: Discharge observed, 790 second-feet May 27, 1943 (gage 

height, 5.37 feet, site then in use), from rating curve extended above 350 secondfeet.

Remarks.- No diversion or regulation above station. Small amount of flow bypasses 

station through debris from dredging operations.

Mean discharge, in second-feet, 19&8

Day

1

2

3

4

5

6

7

8

9

10

May

59

54

52

50

51

76

109

99

86

77

June

580

640

750

600

560

600

620

600

560

500

July

140

125

110

100

93

86

84

74

69

65

Day

11

12

13

14

15

16

17

18

19

20

May

71

71

92

102

128

192

296

364

409

432

June

450

393

384

346

318

302

265

240

216

216

July

74

60

58

54

51

48

48

50

56

48

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...... .... . . ............

Runoff, in inches ............................................................................................................................

May

427

450

442

469

517

570

620

680

620

580

550

284

8.84

June

235

198

180

165

155

140

135

130

125

120

357

10.78

July

44

39

36

34

34

34

38

50

41

33

32

61.5

1.92

Gage height, in feet, and discharge, in second-feet, at indicated time,

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.11 

4.10 

4.14 

4.39 

4.53 

4.52

260 

258 

267 

324 

357 

354

May 23

4.86 

4.82 

4.80 

4.96 

5.04 

4.97

433 

423 

419 

456 

474 

458

Gage . 

height Discharge

.May 18

4.50 

4.49 

4.49 

4.61 

4.69 

4.64

350 

348 

348 

375 

394 

382

May 24

4.92 

4.89 

4.87 

5.10 

5.27 

5.15

446 

440 

435 

488 

527 

499

Gage 

height Discharge

May 19

4.60 

4.70 

4.70 

4.89 

4.89 

4.88

373 

396 

396 

440 

440 

437

May 25

5.08 

5.02 

5.02 

5.28 

5.62 

5.54

483 

469 

469 

529 

607 

589

Gage 

height Discharge

May 20

4.83 

4.80 

4.78 

4.91 

4.95 

4.89

426 

419 

414 

444 

453 

440

May 26

Gage 

height

M

4.83 

4.77 

4.74 

4.88 

4.89 

4.89

Discharge

iy21

426 

412 

405 

457 

440 4'40

May 27

Gage 

height

M

5.00 

4.92 

4.91 

4.94 

4.94 

4.89

Discharge

iy22

465 

446 

444 

451 

451 

440

May 28
SALMON RIVER BASIN

Mud Creek near Tamarack, Idaho

Location.- Lat. 45°00', long. 116°21', In sec. 9, T. 19 N., R. IE., 0.5 mile upstream

from"Little Mud Creek, 3j miles northeast of Tamarack, and 5 miles upstream from

mouth.

Drainage area.- 15.8 square miles. 

Gage-height "record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

136 second-feet and extended to peak stage on basis of shape of former curve defined

below 286 second-feet. 

Maxima.- May-June 1948: Discharge, 204 second-feet 12 m. May 7 (gage height, 4.12

1937-38, 1945 to April 1948: Discharge observed, about 300 second-feet probably 

on May 1, 1938 (gage height, 3.34 feet, from floodmark, site and datum then In use). 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

116

98

103

123

121

146

198

185

151

127

June

44

39

72

54

46

40

35

31

28

26

July

9.1

8.2

7.0

6.7

6.5

6.0

6.0

5.7

5.4

5.2

Day

11

12

13

14

15

16

17

18

19

20

May

110

108

121

136

136

140

159

157

153

136

June

24

22

22

19

18

19

18

18

18

16

July

5.4

5.2

4.7

4.4

4.2

4.2

4.2

4.2

4.2

4.2

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ........ ............. . ......... .................................. .........

Runoff, in inches ............................................. ............... . ...... .....................................................

May

124

145

126

118

112

107

99

88

76

64

52

124

9.03

June

14

14

12

11

10

9.4

8.8

8.2

7.3

7.6

23.7

1.67

July

4.0

3.8

3.6

3.4

3.4

3.1

3.4

4.2

4.0

3.6

3.8

4.87

0.36

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.90 

3.90 

3.88 

3.88 

3.92 

3.93

159 

159 

155 

155 

163 

165

May 23

3.74 

3.73 

3.71 

3.70 

3.72 

3.72

M

3.47 

3.44 

3.42 

3.40 

3.39 

3.38

Jl

3.29 

3.28 

3.27 

3.25 

3.23 

3.23

Ju

2.95 

2.95 

2.95 

2.93 

2.92 

2.91

129 

127 

123 

121 

125 

125

iy29

82 

78 

75 

72 

71 

69

ne4

57 

56 

54 

52 

50 

50

ne 10 ^

26 

26 

26 

25 

25 

24

June 16

2.77 

2.78 

2.83 

2.86 

2.82 

2.83

17 

18 

20 

22 

20 

20

Gage 

height Discharge

May 18

3.92 

3.89 

3.85 

3.86 

3.90 

3.89

163 

157 

150 

151 

159 

157

May 24

3.70 

3.69 

3.67 

3.66 

3.68 

3.68

M

3.36 

3'. 35 

3.34 

3.32 

3.33 

3.31

121 

119 

116 

114 

117 

117

iy30

66 

65 

64 

61 

62 

59

June 5

3.22 

3.21 

3.20 

3.18 

3.16 

3.16

Jv

2.92 

2.93 

2.93 

2.91 

2.89 

2.89

48 

47 

46 

44 

42 

42

ne 11

25 

25 

25 

24 

23 

23

June 17

2.80 

2.79 

2.78 

2.78 

2.78 

2.78

18 

18 

18 

18 

18 

18

Gage 

height Discharge

May 19

3.91 

3.89 

3.85 

3.85 

3.85 

3.84

161 

157 

150 

150 

150 

148

May 25

3.67 

3.66 

5.64 

3.63 

3.65 

3.65

116 

114 

110 

108 

112 

112

May 31

3.28 

3.27 

3.25 

3.23 

3.22 

3.22

56 

54 

52 

50 

48 

48

June 6

3.16 

3.16 

3.14 

3.11 

3.09 

3.09

Ju

2.89 

2.89 

2.89 

2.86 

2.85 

2.86

42 

42 

41 

38 

36 

36

nel2

23 

23 

23 

22 

21 

22

June 18

2.78 

2.78 

2.76 

2.76 

2.80 

2.80

18 

18 

17 

17 

18 

18

Gage 

height Discharge

May 20

3.82 

3.78 

3.76 

3.74 

3.76 

3.76

144 

136 

132 

129 

132 

132

May 26

3.65 

3.63 

3.62 

3.60 

3.61 

3.61

112 

108 

107 

103 

105 

105

June 1

3.21 

3.20 

3.19 

3.16 

3.16 

3.15

Jl

3.10 

3.10 

3.09 

3.06 

3.04 

3.04

47 

46 

45 

42 

42 

L 42

ne7

37 

37 

36 

34 

32 

32

June 13

2.88 

2.88 

2.87 

2.86 

2.85 

2.82

22 

22 

22 

22 

21 

20

June 19

2.78 

2.76 

2.76 

2.75 

2.78 

2.78

18 

17 

17 

17 

18 

18

Gage 

height

Mi

3.74 

3.72 

3.70 

3.70 

3.70 

3.71

Discharge

iy21

129 

125 

121 

121 

121 

123

May 27

3.60 

3.59 

3.57 

3.55 

3.56 

3.55

103 

101 

98 

95 

97 

95

June 2

3.15 

3.14 

3.13 

3.10 

3.09 

3.09

42 

41 

40 

37 

36 

36

June 8

3.04 

3.04 

3.04 

3.02 

3.00 

2.99

Jl

2.82 

2.82 

2.82 

2.80 

2.79 

2.79

32 

32 

32 

31 

30 

29

ne 14

20 

20 

20 

18 

18 

18

June 20

2.78 

2.78 

2.77 

2.74 

2.67 

2.67

18 

18 

17 

16 

13 

13

Gage 

height Discharge

May 22

3.87 

3.92 

3.82 

3.79 

3.79 

3.76

153 

163 

144 

138 

138 

132

May 28

3.54 

3.53 

3.50 

3.48 

3.47 

3.47

Ju

3.25 

3.69 

3.47 

3.38 

3.33 

3.31

Jl

3.00 

2.99 

2.99 

2.97 

2.95 

2.95

93 

92 

87 

84 

82 

82

ne3

52 

119 

82 

69 

62 

59

ne9

30 

29 

29 

28 

26 

26

June 15

2.79 

2.79 

2.79 

2.78 

2.77 

2.77

Ju

2.70 

2.72 

2.73 

2.73 

2.71 

2.70

18 

18 

18 

18 

17 

17

ne21

14 

15 

15 

15 

14 

14

Supplemental record.- May 22, 6 a.m., 3.95 ft., 169 sec.-ft.; June 3, 2 a.m., 3.13 

ft., 40 see.-ft., 6 a.m., 3.50 ft., 87 sec.-ft., 10 a.m., 3.63 ft., 108 sec.-ft.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Grande Ronde River Basin

Grande Ronde River near Hilgard, Oreg.

Location.- Lat. 45°19', long. 118°16', near center of sec. 11, T. 3 S., R. 36 E., 

three-quarters of a mile upstream from Spring Creek and 3 miles southwest of 

Hilgard.

Drainage area.- 489 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 3,300 second-feet 3:30 a.m. May 28 (gage height.

1937 to April 1948: Discharge, 3,240 second-feet Dec. 12, 1946 (gage height, 

5.22 feet) . 

Remarks.- Small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

-

May

910

822

822

998

946

1,070

1,670

1,740

1,800

1,640

June

1,760

1,870

1,950

2,480

1,960

1,810

1,650

1,550

1,440

1,360

July

340

308

288

272

312

276

264

233

214

195

Day

11

12

13

14

15

16

17

18

19

20

May

1,550

1,470

2,060

2,020

1,730

1,770

2,020

1,920

2,160

2,110

June

1,170

1,010

926

874

797

762

702

735

933

843

July

191

180

163

152

142

136

129

132

123

132

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . .. ........ .. ............................... .

Runoff, in inches ............................... ... .... . .... ... . . .. ...................................................

May

2,220

2,970

2,910

2,720

2,700

2,750

2,980

2,990

2,340

1,930

1,850

1,922

4.53

June

958

872

795

715

635

573

510

456

412

376

1,096

2.50

July

119

110

104

102

93

87

87

104

96

87

82

169

0.40

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.40 

4.41 

4.36

2,050 

2,060 

2,000

May 23

5.10 

5.12 

5.02 

4.90 

4.87 

4.90

Mi

4.76 

4.67 

4.61 

4.51 

4.44 

4.43

Ju

5.04 

4.80 

4.68 

4.57 

4.51 

4.48

3,060 

3,090 

2,940 

2,760 

2,720 

2,760

iy29

2,550 

2,430 

2,340 

2,200 

2,110 

2,090

ne 4

2,970 

2,610 

"2,440 

2,290 

2,200 

2,160

June 10

4.00 

3.85 

3.74 

3.66 

3.63 

3.66

Ju

2.98 

2.92 

2.94 

2.89 

2.86 

2.87

1,560 

1,410 

1,310 

1,240 

1,210 

1,240

ne!6

790 

760 

770 

745 

730 

735

Gage 

height Discharge

May 18

4.34 

4.32 

4.30 

4.25 

4.24 

4.37

1,970 

1,950 

1,920 

1,860 

1,840 

2,010

May 24

4.96 

4.94 

4.88 

4.81 

4.78 

4.89

M

4.39 

4.36 

4.32 

4.21 

4.20 

4.27

Ju

4.42 

4.36 

4.30 

4.24 

4.25 

4.36

2,850 

2,820 

2,730 

2,620 

2,580 

2,740

iy30

2,040 

2,000 

1,950 

1,800 

1,790 

1,880

ne5

2,080 

2,000 

1,920 

1,840 

1,860 

2,000

June 11

3.64 

3.59 

3.52 

3.50 

3.60 

3.54

1,220 

1,180 

1,130 

1,110 

1,190 

1,140

June 17

2.88 

2.83 

2.79 

2.74 

2.71 

2.87

740 

715 

695 

670 

655 

735

Gage 

height Discharge

May 19

4.56 

4.56 

4.45 

4.41 

4.45 

^ 4.51

2,270 

2,270 

2,120 

2,060 

2,120 

2,200

May 25

4.95 

4.91 

4.84 

4.78 

4.80 

4.89

2,840 

2,780 

2,670 

2,580 

2,610 

2,740

May 31

4.37 

4.30 

4.21 

4.16 

4.17 

4.23

Jl

4.34 

4.25 

4.16 

4.10 

4.10 

4.25

2,010 

1,920 

1,800 

1,740 

1,750 

1,830

ne6

1,970 

1,860 

1,740 

1,670 

1,670 

1,860

June 12

3.46 

3.40 

3.34 

3.27 

3.25 

3.29

1,080 

1,040 

998 

952 

940 

964

June 18

2.90 

2.83 

2.81 

2.82 

2.90 

3.05

750 

715 

705 

710 

750 

828

Gage 

height Discharge

May 20

4.50 

4.48 

4.44 

4.40 

4.36 

4.44

2,190 

2,160 

2,110 

2,050 

2,000 

2,110

May 26

4.92 

4.90 

4.86 

4.81 

4.87 

5.11

Ju

4.27 

4.23 

4.16 

4.09 

4.08 

4.21

Ju

4.21 

4.12 

4.04 

3.97 

3.98 

4.06

Ju

3.29 

3.24 

3.19 

3.14 

3.22 

3.25

2,790 

2,760 

2,700 

2,620 

2,720 

3,080

ne 1

1,880 

1,830 

1,740 

1,660 

1,650 

1,800

ne7

1,800 

1,690 

1,800 

1,530 

1,540 

1,630

ne!3

964 

934 

904 

877 

922 

940

June 19

3.38 

3.40 

3.28 

3.17 

3.08 

3.06

1,030 

1,040 

958 

894 

844 

833

Gage 

height

M.

4.50 

4.52 

4.48 

4.44 

4.56 

4.83

Discharge

iy21

2,190 

2,220 

2,160 

2,110 

2,270 

2,660

May 27

5.14 

5.07 

4.98 

4.94 

5.02 

5.17

3,120 

3,020 

2,880 

2,820 

2,940 

3,160

June 2

4.36 

4.35 

4.25 

4.17 

4.18 

4.34

' 2,000 

1,980 

1,860 

1,750 

1,770 

1,970

June 8

4.08 

4.00 

3.93 

3.92 

3.94 

4.05

1,650 

1,560 

1,490 

1,480 

1,500 

1,620

June 14

3.25 

3.17 

3.10 

3.04 

3.07 

3.08

940 

894 

855 

822 

838 

844

June 20

3.04 

3.00 

3.02 

3.08 

3.17 

3.26

822 

800 

811 

844 

894 

946

Gage 

height

M

4.98 

5.05 

5.10 

5.08 

5.08 

5.10

Discharge

*y22

2,880 

2,980 

3,060 

3,030 

3,030 

3,060

May 28

5.25 

5.16 

5.04 

4.98 

4.89 

4.84

3,280 

3,150 

2,970 

2,880 

2,740 

2,670

JuneS

4.37 

4.31 

4.23 

4.15 

4.30 

4.80

Jl

3.98 

3.88 

3.80 

3.75 

3.80 

4.03

2,010 

1,930 

1,830 

1,730 

1,920 

2,610

ne9

1,540 

1,440 

1,360 

1,320 

1,360 

1,590

June 15

3.06 

3.01 

2.96 

2.93 

2.93 

3.04

833 

806 

780 

765 

765 

822

June 21

3.30 

3.35 

3.32 

3.25 

3.23 

3.20

970 

1,000 

984 

940 

928 

910

Supplemental record.- May 28, 3:30 a.m., 5.26 ft., 3,300 sec.-ft.
GRAHDE ROMDE RIVER BASIN 221

Grande Ronde River at La Grande, Oreg.

Location.- Lat. 45°21', long. 118°08', in see. 36, (revised) T. 2 S., R. 37 E., 2 miles 

(revised) northwest of La Grande and 4 miles downstream from Pivepoint Creek. Datum 

of gage la 2,831.25 feet above mean aea level, datum of 1929.

Drainage area.- 678 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.-"Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 4,620 aecond-feet 9 p.m. May 22 (gage height, 7.04

1903-15, 1918-23, 1925 to April 1948: Discharge, 8,880 second-feet Mar. 18, 1932 

(gage height, 8.90 feet). 

Remarks.- Small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

78 '

9

10

May

1,380

1,240

1,230

1,500

1,410

1,560

2,360

2,490

2,680

2,450

June

2,160

2,240

2,280

2,790

2,260

2,080

1,920

1,790

1,720

1,630

July

420

375

340

317

360

330

312

274

250

230

Day

11

12

13

14

15

16

17

18

19

20

May

2,290

2,160

2,770

2,790

2,470

2,530

2,810

2,660

3,020

3,000

June

1,430

1,280

1,140

1,090

991

964

869

904

1,170

1,050

July

226

214

192

182

169

156

149

149

149

153

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ........................................... ....................................

Runoff, in inches ............................................................................................................................

May

3,000

4,350

4,240

3,770

3,750

3,740

3,820

3,730

2,940

2,460

2,310

2,675

4.55

June

1,240

1,150

1,030

917

814

723

650

573

518

465

1,328

2.19

July

138

124

119

111

106

98

98

119

116

104

91

199

0.34

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.60 

5.63 

5.64 

 5.66 

5.62 

5.58

2,790 

2,830 

2,840 

2,860 

2,810 

2,770

May 23

6.97 

6.90 

6.78 

6.62 

6.50 

6.50

4,530 

4,440 

4,280 

4,080 

3,920 

3,920

May 29

5.94 

5.83 

5.72 

5.60 

5.50 

5.48j

Ju

5.93 

5.81 

5.61 

5.48 

5.38 

5.34

3,200 

3,070 

2,930 

2,790 

2,670 

2,650

ne 4

3,190 

3,040 

2,800 

2,650 

2,530 

2,480

June 10

4.82 

4.66 

4.53 

4.42 

4.37 

4.38

Ju

3.84 

3.80 

3.78 

3.77 

3.71 

3.70

1,880 

1,720 

1,590 

1,490 

1,440 

1,450

ne!6

1,010 

980 

966 

959 

917 

910

Gage 

height Discharge

May 18

5.55 

5.51 

5.47 

5.43 

5.40 

5.58

2,730 

2,680 

2,640 

2,590 

2,550 

2,770

May 24

6.49 

6.50 

6.39 

6.26 

6.25 

6.33

3,910 

3,920 

3,780 

3,610 

3,600 

3,700

May 30

5.44 

5.38 

5.34 

5.24 

5.17 

5.22

2,600 

2,530 

2,480 

2,360 

2,270 

2,330

June 5

5.29 

5.21 

5.14 

5.06 

5.02 

5.10

2,420 

2,320 

2,240 

2,150 

2,100 

2,190

June 11

4.38 

4.33 

4.27 

4.32 

4.39 

4.42

1,450 

1,410 

1,350 

1,400 

1,460 

1,490

June 17

3.71 

3.68 

3.64 

3.60 

3.57 

3.59

Supplemental record. -

917 

896 

868 

840 

820 

834

Gage 

height Discharge

May 19

5.82 

5.89 

5.80 

5.76 

5.79 

5.85

3,050 

. 3,140 

3,030 

2,980 

3,020 

3,090

May 25

6.45 

6.45 

6.37 

6.28 

6.30 

6.39

3,860 

3,850 

3,750 

3,630 

3,660 

3,780

May 31

5.31 

5.29 

5.19 

5.12

5.11 

5.11

Ji

5.16 

5.09 

5.00 

4.90 

4.85 

4.91

3,440 

2,420 

2,300 

2,210 

2,200 

2,200

ne6

2,260 

2,180 

2,080 

1,970 

1,920 

1,980

June 12

4.31 

4.23 

4.16 

4.10 

4.03 

4.02

1,390 

1,320 

1,260 

1,210 

1,150 

1,150

June 18

3.72 

3.67 

3.63 

3.65 

3.73 

3.91

924 

889 

861 

875 

931 

1,060

Gage 

L height Discharge

May 20

5.86 

5.83 

5.76 

5.70 

5.69 

5.74

3,100 

3,070 

2,980 

2,910 

2,900 

2,960

May 26

6.45 

6.43 

6.34 

6.27 

6.31 

6.41

3,860 

3,830 

3,710 

3,620 

3,670 

3,800

June 1

5.16 

5.17 

5.08 

4.99 

4.95 

5.02

Ju

5.02 

4.95 

4.85 

4.75 

4.70 

4.75

Ju

4.05 

4.03 

3.98 

4.00 

4.00 

4.05

2,260 

2,270 

2,170 

2,070 

2,020 

2,100

ne 7

2,100 

2,020 

1,920 

1,810 

1,760 

1,810

nel3

1,170 

1,150 

1,110 

1,130 

1,130 

1,170

June 19

4.12 

4.22 

4.13 

4.02 

3.92 

3.88

1,230 

1,310 

1,230 

1,150 

1,070 

1,040

Gage 

height Discharge

May 21

5.76 

5.78 

5.75 

5.72 

5.71 

6.10j

2,980 

3,010 

2,970 

2,930 

2,920 

3,400

May 27

6.55 

6.52 

6.42 

6.30 

6.30 

6.47

3,980 

3,950 

3,820 

3,660 

3,660 

3,880

June 2

5.17 

5.28 

5.17 

5.08 

5.05 

5.14

Ju

4.83 

4.77 

4.67 

4.66 

4.7E 

4.76

2,270 

2,410 

2,270 

2,170 

2,140 

2,240

ne 8

1,890 

1,830 

1,730 

1,720 

1,780 

1,820

June 14

4.05 

4.01 

3.95 

3.88 

3.86 

3.88

1,170 

1,140 

1,090 

1,040 

1,020 

1,040

June 20

3.86 

3.84 

3.83 

3.88 

3.97 

4.06

1,020 

1,010 

1,000 

1,040 

1,110 

1,180

Gage 

height Discharge

May 22

6.57 

6.83 

6.99 

7.03 

7.00 

6.96

4,010 

4,350 

4,560 

4,610 

4,570 

4,520

May 28

6.62 

6.51 

6.35 

6.26 

6.15 

6.04

4,080 

3,930 

3,720 

3,610 

3,460 

3,320

June 3

5.26 

5.22 

5.13 

5.05 

5.06 

5.45

Ju

4.76 

4.64 

4.56 

4.58 

4.61 

4.78

Ju

3.88 

3.85 

3.80 

3.77 

3.73 

3.82

2,380 

2,330 

2,230 

2,140 

2,150 

2,610

ne9

1,820 

1,700 

1,620 

1,640 

1,670 

1,840

ne!5

1,040 

1,020 

980 

959 

931 

994

June 21

4.14 

4.16 

4.19 

4.14 

4.10 

4.08

1,240 

1,260 

1,280 

1,240 

1,210 

1,190

May 22, 9 p.m. 7.04 ft., 4,620 sec. -ft.; June 9, 2 a.m., 4.80

ft., 1,860 sec. -ft'.; June 11, 10 p.m., 4.50 ft., 1,560 sec. -ft.
222 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Grande Ronde River at Rondowa, Oreg.

Location.- Lat. 45°44', long. 117°47', in NW£ sec. 23, T. 3 N., R. 40 E., at Rondowa,

500 feet downstream from Wallowa River. Datum of gage is 2,281.4 feet above mean

sea Isvel, datura of 1929 (union Pacific System track profile). 

Drainage area.- 2,555 square miles. 

Gage-height record.- Water-stage recorder graph except for periods of faulty float

operation 4 a.m. to 8 a.m. May 28, 12 p.m. June 3 to 8 p.m. June 5, 8 a.m. to 8 p.m.

June 6, record for which was -computed on basis of shape of graph as recorded and

floodmark in well. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

13,400 second-feet. 

Maxima.- May-June 1948: Discharge, 19,900 second-feet 2 a.m. May 28 (gage height, 9.76

feet, from floodmark in well).

1926 to April 1948: Discharge, 18,300 second-feet (revised) Mar. 18, 1932 (gage

height, 9.30 feet). 

Remarks.- Many diversions above station for irrigation. Plow slightly regulated by

Wallowa Lake Reservoir.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

5,380

5,040

5,080

5,640

5,340

5,580

7,520

7,520

7,540

7,470

June

12,700

13,500

14,000

13-, 000

12,500

13,100

13,400

13,800

13,800

13,400

July

5,400

4,730

4,100

3,710

3,530

3,230

3,080

2,830

2,640

2,540

Day

11

12

13

14

15

16

17

18

19

20

May

7,260

6,960

7,420

7,520

7,540

-7,880

8,980

8,900

11,200

12,000

June

12,100

10,700

9,760

9,300

9,510

9,000

8,080

7,550

7,760

7,810

July

2,540

2,530

2,320

2,150

2,020

1,900

1,790

1,710

1,700

1,670

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ....... . ............. .................................................

Runoff, in inches ............................................................................................................................

May

12,000

13,000

13,300

14,500

15,600

16,500

17,800

18,500

15,500

13,300

12,500

4.52

June

8,320

7,540

6,940

6,730

6,510

6,040

5,780

5,820

5,700

5,700

4.22

July

1,580

1,480

1,420

1,360

1,290

1,210

1,160

1,210

1,220

1,160

1,110

1.02

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

6.23 

6.23 

6.19 

6.14 

6.12 

6.14

9,130 

9,130 

9,020 

8,890 

8,830 

8,890

May 23

7.64 

7.64 

7.62 

7.65 

7.84 

8.08

M,

8.72 

8.55 

8.38 

8.21 

8.09 

8.02

Ju

7.77 

7.72 

7.59 

7.45 

7.41 

7.50

13,100 

13,130 

13,100 

13,200 

13,700 

14,400

iy*29

16,500 

15,900 

15,400 

14,900 

14,500 

14,300

ne 4

13,500 

13,400 

13,000 

12,600 

12,400 

12,700

r June 10

8.11 

7.88 

7.68 

7.51 

7.47 

7.52

Ju

6.33 

6.29 

6.20 

6.08 

6.00 

6.02

14,500 

13,800 

13,200 

12,700 

12,600 

12,800

ne!6

9,400 

9,290 

9,050 

8,730 

8,520 

8,570

Gage 

height Discharge

May 18

6.16 

6.15 

6.13 

6.09 

6.10 

6.32

8,940 

8,920 

8,860 

8,750 

8,780 

9,370

May 24

8.15 

8.07 

7.96 

7.92 

8.12 

8.44

M

7.93 

7.78 

7.63 

7.49 

7.52 

7.61

14,700 

14,400 

14,100 

14,000 

14,600 

15,600

iy30

14,000 

13,500 

13,100 

12,700 

12,800 

13,000

June 5

7.57 

7.52 

7.42 

7.31 

7.34 

7.50

Ju

7.51 

7.41 

7.30 

7.17 

7.12 

7.18

12,900 

12,800 

12,500 

12,100 

12,200 

12,700

ne 11

12,700 

12,400 

12,100 

11,700 

11,600 

11 , 800

June 17

5.98 

5.91 

5.82 

5.72 

5.67 

5.72

8,470 

8,290 

8,060 

7,810 

7,690 

7,810

Gage 

height Discharge

May 19

6.65 

7.09 

7.19 

7.08 

7.09 

7.30

10,300 

11,500 

11,800 

11,500 

11,500 

12,100

May 25

8.51 

8.43 

8.31 

8.25 

8.47 

8.79

15,800 

15,503 

15,200 

15,000 

15,700 

16,700

May 31

7.58 

7.47 

7.33 

7.24 

7.33 

7.57

Jl

7.66 

7.76 

7.69 

7.54 

7.55 

7.65

12,900 

12,600

12,200 

11,900 

12,200 

12,900

ne6

13,200 

13,500 

13,300 

12,800 

12,800 

13,200

June 12

7.09 

6.92 

6.78 

6.61 

6.53 

6.63

11,500 

11,000 

10,600 

10,200 

9,940 

10,200

June 18

5.70 

5.62 

5.57 

5.50 

5.56 

5.73

7,760 

7,570 

7,540 

7,280 

7,420 

7,840

Gage 

height Discharge

May 20

7.41 

7.31 

7.21 

7.15 

7.18 

7.31

12,400 

12,100 

11,900 

11,700 

11,800 

12,100

May 26

8.80 

8.72 

8.58 

8.56 

8.78 

9.15

Ju

7.59 

7.50 

7.38 

7.30 

7.48 

7.77

Ju

7.77 

7.81 

7.71 

7.58 

7.76 

7.96

16,700 

16,500 

16,000 

15,900 

16,600 

17,800

ne 1

13,000 

12,700 

12,400 

12,300 

12,600 

13,500

ne 7

13,500 

13,600 

13,300 

12,900 

13,500 

14,100

June 13

6.60 

6.50 

6.41 

6.33 

6.41 

6.46

10,100 

9,860 

9,620 

9,400 

9,620 

9,750

June 19

5.76 

5.71 

5.66 

5.64 

5.66 

5.78

7,910 

 7,730 

7,660 

7,620 

7,660 

7,960

Gage 

height Discharge

May 21

7.35 

7.28 

7.21 

7.15 

7.14 

7.25

12,300 

12,100 

11,900 

11,700 

11,700 

12,000

May 27

9.21 

9.12 

9.00 

8.92 

9.28 

9.66

18,000 

17,700 

17,400 

17,100 

18,300 

19,500

June 2

7.84 

7.77 

7.64 

7.59 

7.82 

8.14

Ju

8.00 

7.86 

7.76 

7-. 68 

7.89 

8.11

13,700 

13,500 

13,100 

13,000 

13,700 

14,600

ne 8

14,200 

13,800 

13,500 

13, 200 

13,900 

14,500

June 14

6.45 

6.36 

6.23 

6.12 

6.23 

6.30

Ju

5.80 

5.75 

5.69 

5.66 

5.67 

5.71

9,720 

9,480 

9,130 

8,830 

9,130 

9,320

ne20

8,010 

7,880 

7,740 

7,660 

7,690 

7,780

Gage 

height Discharge

May 22

7.47 

7.60 

7.71 

7.72 

7.65 

7.64

12,600 

13,000 

13,300 

13,400 

13,200 

13,100

May 28

9.74 

9.58 

9.39 

9.18 

9.01 

8.86

Ju

8.18

8.07 

7.94 

7.79 

7.70 

7.74

Ju

8.06 

7.91 

7.73 

7.58 

7.81 

8.13

19,800 

19,300 

18,600 

17,900 

17,400 

16,900

iie3

14,800 

14,400 

14,000 

13,600 

13,300 

13,400

ne9

14,400 

13,900 

13,400 

12,900 

13,600 

14, 600

June 15

6.31 

6.57 

6.41 

6.23 

6.36 

6.33

9,350 

10,100 

9,620 

9,130 

9,480 

9,400

June 21

5.79 

5.92 

6.11 

6.02 

5.92 

5.82

7,980 

8,310 

8,810 

8,570 

8,310 

8,060

Supplemental record.- May 28, 2 a.m., 9.76 ft., 19,900 sec.-ft.
GRAMDE RONDE RIVER BASIN 22;

Grande Ronde River at Troy, Oreg.

Location.- Lat. 45°57', long. 117°27', in NW£ sec. 4, T. 5 N., R. 45 E., at bridge at

Troy, 100 feet downstream from Wenaha River. 

Drainage area.- 3,275 square miles. 

gage-height recora.- Wire-weight gage read once daily except May 6, 30, 31, June 6,

July I, when there was no gage-height record. Doubtful reading May 4. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Discharge for days of doubtful or no gage-height record computed on basis of

records for station at Rondowa. 

Maxima.- May-June 1948: Discharge, 23,600 second-feet May 27 (gage height, 22.15 feet,

from floodmarks).

1944 to April 1948: Discharge observed, 26,500 second-feet Dec. 15, 1946 (gage

height, 23.20 feet). 

Remarks.- Many diversions above station for irrigation. Plow slightly regulated by

Wallowa Lake and Minam Lake Reservoirs.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

8,090

7,670

7,160

8,500

8,280

8,800

12,300

12,000

11,900

11,600

June

14,700

15,700

16,400

15,000

14,700

15,300

15,300

15,500

16,000

15,000

July

7,000

6,880

6,570

6,310

5,640

4,060

3,580

3,500

3,360

3,290

Day

11

12

13

14

15

16

17

18

19

20

May

11,200

10,900

11,800

11,300

11,100

12,000

12,700

12,600

16,300

17,100

June

14,400

14,000

11,200

11,200

11,500

11,300

10,500

9,600

9,670

9,810

July

3,190

3,020

2,830

2,700

2,490

2,290

2,120

2,070

1,990

1,940

Day

21

22

23

24

25

26

27

28

29

an

31

Monthly mean discharge, in second-feet .... ... ....... .. .. ........................... .....................

Runoff, in inches ............................................................................................................................

May

17,400

17,600

16,700

18,000

19,500

20,900

22,800

22,200

18,700

16,000

15,000

13,820

4.86

June

10,400

9,330

8,670

8,280

8,030

7,670

7,440

7,270

6,830

7,160

11,600

3.95

July

1,920

1,850

1,800

1,730

1,710

1,660

1,620

1,600

1,560

1,520

1,480

3,009

1.06

Gage height, in feet, and discharge, in second-feet, at indicated timer 19J8

Hour

8^

8a

ll:30a

lOa

8a

5:30p

lla

8a

Gage 

height Discharge

May 17

19.94 12,700

May 18

19.92 12,600

May 19

20.78 16,300

May 20

20.98 17,300

May 21

21.00 17,400

May 22

21.04 17,600

May 23

20.86 16,700

May 24

21.12 18,000

Hour

8a

7:30a

7;35a

9;15a

8a

8a

6a

12:35p

6p

Gage 

height Discharge

May 25

21.40 19,500

May 26

21.66 20,900

May 27

22.00

21.90

22,800

22,200

May 28

21.90 22,200

May 29

21.26 18,700

June 1

20.42 14,700

June 2

20.64

Jui

20.80

15,700

le 3

16,400

Hour

1 P

8a

10:30a

8a

7a

8a

8a

8a

2:30p

Gage 

height Discharge

June 4

20.50 15,000

June 5

20.42 14,700

June 7

20.56 15,300

June 8

20.60 15,500

June 9

20.70 16,000

June 10

20.50 15,000

June 11

20.36 14,400

June 12

20.26

JL

19.56

14,000

me 13

11,200

Hour

3p

2p

8a

8a

8a

8a

3p

8a

Gage 

height Discharge

June 14

19.54 11,200

June 15

19.64 11,500

June 16

19.58 11,300

June 17

19.56 10,500

June 18

19.10 9,600

June 19

19.12 9,670

June 20

19. 1& 9,810

June 21

19.34 10,400
224 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

Catherine Creek near Union, Oreg.

Location.- Lat. 45°09', long. 117°47', in SE£ sec. 2, T. 53., R. 40 E., 3 miles downstream from Little Catherine Creek and 6 miles southeast of Union. Datum of gage is

3,082.11 feet above mean sea level, datum of 1929. 

Drainage area.- 105 square miles. 

Page-height record.- Water-stage recorder graph; gage-height record doubtful from about

May 29 to 3:30 p.m. June 1.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 1,740 second-feet 8 to 9 p.m. May 27 (gage height,

4.57 feet).

1906-7, 1911-12, 1915, 1918-19, 1925 to April 1948: Discharge observed, 1,240

second-feet May 21, 1912, June 3 or 4, 1933. 

Remarks.- Small diversions above station for irrigation and some water diverted into Big

Creek in Powder River Basin.

Mean discharge, in second-feet, 19&8

Day

1

2

3

4

5

6

7

8

9

10

May

277

255

264

280

277

356

492

452

412

372

June

940

1,070

1,100

1,040

1,040

1,030

984

978

943

870

July

255

222

202

185

178

163

157

147

135

128

Day

11

12

13

14

15

16

17

18

19

20

May

360

352

412

474

500

630

794

772

1,070

1,090

June

762

638

582

551

536

493

437

407

397

389

July

131

121

121

114

110

103

100

103

98

97

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . .... ...................................

Runoff, in inches .................................................. .............. .........................'................................

May

1,080

1,170

1,160

 1,260

1,400

1,450

1,500

1,390

1,030

863

813

741

8.14

June

443

385

357

343

326

303

291

282

276

267

616

6.54

July

90

84

81

81

75

74

77

91

81

74

68

121

1.33

Gage height, in feet, and discharge, in second-feet, at indicated time, 19j8

t~t

1

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.41 

3.36 

3.32 

3.31 

3.34 

3.37

826 

796 

772 

766 

784 

802

May 23

3.87 

3.81 

3.74 

3.81 

4.11 

4.10

Mi

3.71 

3.63 

3.55 

3.47 

3.49 

3.49

Ju

3.62 

3.55 

3.48 

3.54 

3.72 

3.71

1,140 

1,090 

1,040 

1,090 

1,330 

1,320

iy29

1,110 

1,060 

1,010 

962 

974 

974

ne4

1,050 

1,010 

968 

1,000 

1,110 

1,110

June 10

3.39 

3.30 

3.22 

3.23 

3.34 

3.32

914 

860 

812 

818 

884 

872

June 16

2.64 

2.58 

2.54 

2.53 

2.56 

2.54

518 

492 

47S 

472 

484 

476

Gage 

height Discharge

May 18

3.34 

3.27 

3.22 

3.24 

3.37 

3.55

784 

744 

716 

727 

802 

910

May 24

3.99 

3.91 

3.84 

3.95 

4.25 

4.31

M

3.40 

3.31 

3.23 

3.21 

3.30 

3.27

Ju

3.61 

3.53 

3.45 

3.57 

3.73 

3.67

1,230 

1,170 

1,110 

1,200 

1,460 

1,510

iy30

920 

866

818 

806

eso

842

ne 5

1,050 

998 

950 

1,020 

1,120 

1,080

June 11

3.24 

3.17 

3.06 

3.06 

3. OS 

3.02

824 

784 

723 

723 

734 

701

June 17

2.49 

2.46 

2.42 

2.39 

2.43 

2.39

456 

444 

428 

416 

432 

416

Gage 

height Discharge

May 19

3.67 

3.80 

3.74 

3.80 

3.93 

3.93

989 

1,080 

1,040 

1,080 

1,180 

1,180

May 25

4.17 

4.09 

4.01 

4.11 

4.45 

4.30

1,380 

1,310 

1,250 

1,330 

1,640 

1,500

May 31

3.21 

3.15 

3.11 

3.12 

3.36 

3.46

806 

772 

750 

756 

896 

956

June 6

3.58 

3.52 

3.42 

3.56 

3.73 

3.64

1,030 

992 

932 

1,020 

1,120 

1,060

June 12

2.96 

2.91 

2.85 

2.82 

2.90 

L2.86

670 

645 

615 

600 

640 

620

June 18

2.35 

2.32 

2.30 

2.32 

2.47 

2.43

402 

392 

385 

392 

448 

432

Gage 

height

Ma

3.86 

3.78 

3.71 

3.73 

3.87 

3.87

Discharge

y20

1,130 

1,070 

1,020 

1,030 

1,140 

1,140

May 26

4.20 

4.11 

4.04 

4.17 

4.56 

4.47

1,410 

1,330 

1,270 

1,380 

1,730 

1,650

June 1

3.34 

3.26 

3.25 

3.46 

3.72 

3.68

Ju

3.52 

3.46 

3.39 

3.49 

3.59 

3.55

884 

836 

830 

956 

1,110 

1,090

ne7

992 

956 

914 

974 

1,030 

1,010

June 13

2.81 

2.76 

2.72 

2.74

2,82 

2.80

595 

572 

554 

563 

600 

590

June 19

2.36 

2.32 

2.31 

2.30 

2.34 

2.33

406 

392 

388 

385 

399 

396

Gage 

height Discharge

May 21

3.80 

3.78 

3.70 

3.73 

3.87 

3.89

1,080 

1,070 

 1,010 

1,020 

1,140 

1,150

May 27

4.28 

4.17 

4.07 

4.25 

4.57 

4.44

1,480 

1,380 

1,300 

1,460 

1,740 

1,660

June 2

3.59 

3.53 

3.48 

3.61 

3.87 

3.86

1,030 

998 

968 

1,050 

1,220 

1,210

JuneS

3.48 

5.45 

3.41 

3.49 

3.62 

3.52j

968 

950 

926 

974 

1,050 

' 992

June 14

2.75 

2.69 

2.65 

2.67 

2.76 

2.72

568 

540 

522 

532 

572 

554

June 20

2.30 

2.27 

2.27 

2.33 

2.35 

2.36

385 

374 

374 

396 

402 

406

height

Mi

3.84 

3.94 

3.97 

3.90 

3.91 

3.90

Discharge

ly 22

1,110 

1,190 

1,220 

1,160 

1,170 

1,160

May 28

4.31 

4.17 

4.08 

3.97 

3.91 

3.80

1,560 

1,450 

1,370 

1,290 

1,250 

1,170

June 3

3.77 

3.68 

3.59 

3.63 

3.74 

3.7,0

JL

3.42 

3.36 

3.29 

3.41 

3.63 

3.52

1,150 

1,090 

1,030 

1,060 

1,130 

1,100

ne9

932 

896 

854 

926 

1,060 

992

June 15

2.73 

2.68 

2.62 

2.61 

2.72 

2.72

558 

536 

509 

504 

554 

554

June 21

2.44 

2.62 

2.50 

2.43 

2.38 

2.37

436 

509 

460 

432 

413 

410

Supplemental record.- May 19, 5 a.m., 3.79 ft., 1,070 sec.-ft.; May 27, 9 p.m. 

ft., 1,740 sec.-ft.

4.57
GRANDE RONDE RIVER BASIN 225

Indian Creek near Imbler, Oreg.

Location.- Lat. 45°26', long. 117°49', in S| sec. 33, T. 1 S., R. 40 E., 200 yards upstream from North Fork and 7 miles southeast of Imbler. 

Drainage area.- 22 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

400 second-feet. Shifting-control method used May 22-28. 

Maxima.- May-June 1948: Discharge, 818 second-feet 9 to p.m. May 27 (gage height, 3.52

1938 to April 1948: Discharge, 730 second-feet May 28, 1946; gage height, 3.92 

feet (backwater from ice) sometime during period Dec. 7, 1941 to Apr. 19, 1942. 

Remarks.- No diversion or regulation above station.

Mean discharge, in secondrfeet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

46

43

43

42

39

50

72

72

66

61

June

360

432

438

390

395

398

412

451

466

415

July

119

105

92

83

80

73

70

63

57

52

Day

11

12

13

14

15

16

17

18

19

20

May

59

59

87

90

97

130

187

218

303

299

June

336

289

255

238

230

213

194

185

190

183

July

50

45

40

37

35

32

30

30

28

26

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...................................... ... .. .. .... ...

Runoff, in inches ............................................................................................................................

May

275

364

382

400

444

537

665

637

460

359

341

223

11.71

June

229

205

178

165

155

144

136

134

132

130

269

13.66

July

24

22

21

20

18

18

17

19

20

18

16

439

2.30

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

sec

£&\ Discharge

May 17

2.42 

2.43 

2.43 

2.45 

2.46 

2.47

179 

184 

184 

192 

197 

202

May 23

2.85 

2.83 

2.80 

2.86 

2.88 

2.86

391 

377 

349 

391 

398 

384

May 29

2.95 

2.86 

2.80 

2.79 

2.78 

2.73

535 

472 

430 

424 

418 

388

June 4

2.75 

2.74 

2.71 

2.72 

2.73 

2.74

Ju

2.84 

2.79 

2.74 

2.74 

2.73 

2.69

Ju

2.34 

2.32 

2.31 

2.33 

2.33 

2.30

400 

394 

376 

382 

388 

394

ne 10

45'8 

424 

394 

394 

388 

365

nel6

217 

211 

208 

214 

214 

205

Gage 

height Discharge

May 18

2.47 

2.47 

2.48 

2.50 

2.54 

2.64

202 

202 

206 

215 

237 

296

May 24

2.86 

2.86 

2.83 

2.92 

2.97 

2.98

M

2.70 

2.67 

2.65 

2.66 

2.69 

2.67

Ju

2.73 

2.71 

2.69 

2.76 

2.80 

2.78

Ju

2.66 

2.63 

2.61 

2.61 

2.64 

2.60

377 

377 

356 

420 

458 

442

»y30

370 

355 

345 

350 

365 

355

ne5

388 

376 

365 

406 

430 

418

nell

350 

335 

325 

325 

340 

320

June 17

2.28 

2.27 

2.24 

2.25 

2.27 

2.24

Supplemental record.

.-ft., 11 p.m., 3.52

199 

196 

187 

190 

196 

187

Gage 

height

Ma

2.66 

2.64 

2.63 

2.65 

2.67 

2.67

Discharge

yl9

309 

296 

290 

302 

316 

316

May 25

2.98 

2.95 

2.95 

3.06 

3.01 

3.12

428 

405 

405 

488 

450 

536

May 31 '

2.64 

2.62 

2.60 

2.65 

2.67 

2.67

340 

330 

320 

345 

355 

355

June 6

2.75 

2.70 

2.70 

2.75 

2.79 

2.79

Ju

2.56 

2.54 

2.51 

2.50 

2.53 

2.49

Ju

2.23 

2.21 

2.20 

2.21 

2.29 

2.29

400 

370 

370 

400 

424 

424

ne!2

302 

293 

280 

275 

288 

271

ne!8

184 

178 

175 

178 

202 

202

Gage 

height Discharge

May 20

2.65 

2.64 

2.63 

2.64 

2.65 

2.64

302 

296 

290 

296 

302 

296

May 26

3.09 

3.06 

3.05 

3.17 

3.20 

3.23

512 

488 

480 

576 

600 

600

June 1

2.66 

2.62 

2.61 

2.67 

2.76 

2.76

Jl

2.78 

2.75 

2.70 

2.75 

2.82 

2.83

Ju

2.46 

2.43 

2.42 

2.45 

2.47 

2.44

350 

330 

325

' 355 

406 

406

ne7

418 

400 

370 

400 

444 

451

ne!3

259 

247 

243 

255 

263 

251

June 19

2.26 

2.25 

2.24 

2.24 

2.25 

2.24

193 

190 

187 

187 

190 

187

Gage 

height Discharge

May 21

2.63 

2.60 

2.59 

2.59 

2.60 

2.62

290 

270 

264 

264 

270 

283

May 27

3.24 

3.28 

3.25 

3.34 

3.49 

3.47

592 

624 

600 

672 

792 

792

June 2

2.78 

2.77 

2.76 

2.82 

2.87 

2.85

Ju

2.78 

2.77 

2.75 

2.80 

2.93 

2.90

Ju

2.41 

2.39 

2.37 

2.39 

2.44 

2.42

Ju

2.23 

2.21 

2.20 

2.21 

2.25 

2.27

418 

412 

406 

444 

479 

465

ne8

418 

412 

400 

430 

521 

500

ne 14

239 

232 

226 

232 

251 

243

ne20

184 

178 

175 

178 

190 

196

Gage 

height

Mi

2.67 

2.79 

2.83 

2.84 

2.85 

2.85

Discharge

iy22

302 

363 

391 

391 

398 

391

May 28

5.40 

3.30 

3.15 

3.05 

2.98 

3.00

^ 757 

693 

592 

563 

535 

570

June 3

2.84 

2.82 

2.81 

2.80 

2.79 

2.76

458 

444 

437 

430 

424 

406

June 9

2.86 

2.81 

2.77 

2.83 

2.93 

2.90

Ju

2.40 

2.37 

2.36 

2.39 

2.39 

2.36

472 

437 

412 

451 

521 

500

ne!5

235 

226 

223 

232 

232 

223

June 21

2.29 

2.39 

2.45 

2.42 

2.39 

2.36

202 

232 

255 

243 

232 

223

- May 27, 9 p.m., 3.52 ft., 818 sec. -ft., 10 p.m., 3.49 ft., 792 

ft., 818 sec. -ft.; June 1, 10 p.m., 2.80 ft., 430 sec. -ft.;

June 8, 6 p.m. 3.00 ft., 570 sec.-ft.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

East Fork Wallowa River near Joseph, Oreg.

Location.- Lat. 45°16', long. 117°13', In SW£ sec. 29, T. 3 S., R. 45 E., a quarter of 

a mile upstream from mouth, 1 mile upstream from Wallowa Lake, and 6 miles south of 

Joseph. Datum of gage Is 4,517.69 feet above mean sea level, datum of 1929.

Drainage area.- 9.6 square miles.

Gage-height record.- Graph based on twice-daily staff-gage readings except May 13, 26,

 2'7,' 29, 31, June 1, 4-9, 11-13, 16, 22, 23, July 14, 17, 28-31 (once-daily readings), 

June 2, 10 (no gage reading), and July 1, 26, 29 (doubtful gage reading).

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

87 second-feet and extended to peak stage by logarithmic plotting. Shifting-control 

method used June 20 to July 31.

Maxima.- May-June 1948: Discharge, 171 second-feet 4 p.m. June 8 (gage height, 2.70

1924 to April 1948: Discharge, 300 second-feet July 25, 1937 (gage height, 3.63 

feet, from floodmark), computed on basis of rating curve extended above 80 secondfeet and unpublished records of storage in Wallowa Lake Reservoir.

Remarks.- Wallpwa Palls power plant of Pacific Power & Light Co. diverts water 1 mile 

above station; combined flow given herein.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

16

14

15

14

15

18

20

17

18

18

June

76

90

87

96

106

113

127

167

157

158

July

84

77

71

61

60

67

64

62

62

61

Day

11

12

13

14

15

16

17

18

19

20

May

18

17

18

16

18

27

29

29

31

33

June

144

132

. 127

131

142

132

136

134

151

135

July

61

62

60

61

59

56

55

52

53

50

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... . .....................................................

Runoff, in inches ............................................................................................................................

May

31

34

39

46

58

59

67

77

66

63

69

32.7

3.93

June

106

90

89

89

89

94

95

96

92

89

116

13.44

July

49

48

46

46

42

40

41

41

37

32

30

54.5

6.55

Wallowa Palls power-plant tallrace near Joseph, Oreg.

Location.- Lat. 45 D 16', long. 117 D 13', in SE£ sec. 29, T. 3 S., R. 45 E., a quarter of

a mfle" upstream from mouth and 6 miles south of Joseph. Datum of gage is 4,624.79

feet above mean sea level, datum of 1929. 

Page-height record.- Staff gage read hourly. 

Discharge record.-"Stage-discharge relation for sharp-crested weir control defined by

current-meter measurements.

Maximum.- May-June 1948: Daily discharge, 14 second-feet May 9-25, June 18. 

Remarks.- Plow regulated-for impulse wheel in powerhouse. Water diverted at dam on

East Pork Wallowa River into conduit 1 mile above powerhouse and discharged into

West Pork a quarter of a mile below station.

Mean discharge, in secondly

1

2

3

4

5

6

7

8

9

10

Ma$r

13

12

13

12

13

13

13

13

14

14

June

13

12

12

13

12

11

11

13

8.3

9.7

July

13

11

11

11

10

12

12

12

12

13

Day

11

12

13

14

15

16

17

18

19

20

May

14

14

14

14

14

14

14

14

14

14

June

12

12

12

12

12

12

13

14

13

12

feet, 1948

July

12

13

12

13

13

12

12

10

13

12

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

14

14

14

14

14

13

13

4.0

12

12

13

June

12

12

13

13

13

13

11

12

11

13

July

11

13

13

12

11

9.6

11

12

12

13

12
GRANDE RONDE RIVER BASIN 221

Hurricane Creek near Joseph, Oreg.

Location.- Lat. 45°20', long. 117°18', In NE£ sec. 3, T. 3 S., R. 44 E., upstream from

intake of Moonshine ditch and 3^ miles southeast of Joseph. 

Drainage area.- 31 square miles. 

gage-height record.- Water-stage recorder graph except period 1 p.m. May 7 to 2 p.m.

May 11, when there was no gage-height record. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

455 second-feet and extended to peak stage by logarithmic plotting. Discharge for

period of no gage-height record computed-on basis of records for Bear Creek near

Wallowa and Lostine River near Lostine. 

Maxima.- May-June 1948: Discharge, 1,110 second-feet 11:30 p.m. June 9 (gage height,

3.55 feet).

1915, 1924 to April 1948: Discharge, 774 second-feet July 7, 1943 (gage height,

3.13 feet). 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

53

52

53

52

50

71

86

80

75

70

June

465

499

557

516

558

595

660

738

783

624

July

326

270

259

254

259

254

259

243

243

249

Day

11

12

13

14

IS

16

17

18

19

an

May

68

66

74

74

84

128

167

166

166

188

June

508

462

434

430

431

414

367

345

387

353

July

281

259

238

222

218

214

209

232

214

191

Day

21

22

23

24

25

26

27

28

ft)

80

31

Monthly mean discharge, in second-feet.................................................... .. ... ...................

Runoff, in inches ............................................................................................................................

May

206

207

245

350

407

446

559

503

389

357

420

191

7.09

June

313

287

281

287

281

281

307

313

339

360

439

15.80

July

186

191

186

171

155

148

148

138

128

119

119

212

7.90

Gage height, in feet, and discharge, in second-feet, at indicated timq, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.09 

2.08 

2.04 

2.08 

2.10 

2.11

169 

166 

155 

166 

172 

175

May 23

2.19 

2.17 

2.19 

2.38 

2.49 

2.50

ME

2.61 

2.60 

2.59 

2.60 

2.58 

2.56

Ju

2.85 

2.75 

2.70 

2.76 

2.88 

2.83

Ju

3.23 

3.22 

3.12 

3.14 

3.20 

3.18

201 

194 

201 

276 

330 

335

iy29

396 

390 

384 

390 

379 

368

ne4

555 

485 

450 

492 

576 

541

ne 10

620 

610 

518 

536 

590 

572

June 16

3.02 

2.97 

2.96 

2.99 

3.00 

2.98

436 

398 

390 

412 

420 

405

Gage 

height Discharge

May 18

2.11 

2.10 

2.08 

2.07 

2.07 

2.06

175 

172 

166 

163 

163 

160

May 24

2.48 

2.42 

2.45 

2.58 

2.65 

2.62

325 

295 

310 

379 

420 

402

May 30

2.54 

2.48 

2.47 

2.54 

2,61 

2.63

Ju

2.80 

2.73 

2.78 

2.98 

3.00 

2.91

Ju

3.13 

3.11 

3.09 

3.08 

3.10 

3.10

357 

325 

320 

357 

396 

408

ne5

520 

471 

506 

654 

670 

598

ne 11

527 

509 

492 

484 

500 

500

June 17

2.95 

2.93 

2.91 

2,91 

2.93 

2.92

382 

368 

352 

352 

368 

360

Gage 

height Discharge

May 19

2.08 

2.04 

2.06 

2.08 

2.11 

2.12

166 

155 

160 

166 

175 

178

May 25

2.58 

2.51 

2.56 

2.71 

2.75 

2.65

379 

340 

368 

457 

485 

420

May 31

2.61 

2.60 

2.58 

2.67 

2.75 

2.73

Ju

2.89 

2.81 

2.82 

2.90 

3.07 

3.08

396 

390 

379 

432 

485 

471

ne6

583 

527 

534 

590 

726 

 734

June 12

3.07 

3.04 

3.02 

3.03 

3.05 

3.05

476 

452 

436 

444 

460 

460

June 18

2.91 

2.90 

2.88 

2.87 

2.91 

2.93

352 

545 

332 

326 

352 

368

Gage 

height Discharge

May 20

2.12 

2.10 

2.09 

2.17 

2.25 

2.22

178 

172 

169 

194 

222 

211

May 26

2.65 

2.58 

2.58 

2.77 

2.81 

2.80

420 

379 

379 

499 

527 

520

June 1

2.73 

2.68 

2.66 

2.75 

2.77 

2.73

Ju

2.96 

2.97 

2.85 

3.00 

3.10 

3.00

471 

438 

426 

485 

499 

471

ne 7

638 

646 

555 

670 

750 

670

June 13

3.00 

2.97 

2.97 

3.04 

3.07 

3.05

420 

398 

398 

 452 

476 

460

June 19

2.92 

2.92 

2.95 

2.99 

3.00 

2.98

360 

360 

382 

412 

420 

405

Gage 

height Discharge

May 21

2.21 

2.19 

2.15 

2.18 

2.24 

2.27

208 

201 

188 

198 

218 

229

May 27

2.78 

2.72 

2.77 

3.00 

3.00 

2.87

506 

464 

499 

670 

670 

569

June 2

2.65 

2.63 

2.64 

2.86 

2.99 

2.90

Ju

3.02 

3.01 

3.00 

3.16 

3.22 

3.20

Ju

3.02 

2.98 

2.96 

3.03 

3.05 

3.02

420 

408 

414 

562 

662 

590

ne8

686 

678 

670 

798 

846 

830

ne 14

436 

405 

390 

444 

460 

436

June 20

2.94 

2.91 

2.90 

2.89 

2.89 

2.88

375 

352 

345 

339 

339 

332

Gage 

height

M<

2.23 

2.20 

2.19 

2.20 

2.20 

2.20

Discharge

iy 22

215 

204 

201 

204 

204 

204

May 28

2.83 

2i87 

2.77 

2.70 

2.72 

2.66

541 

569 

499 

450 

464 

426

June 3

2.95 

2.90 

2.82 

2.77 

2.81 

2.82

Ju

3.04 

2.97 

2.98 

3.16 

3.31 

3.49

Ju

3.01 

2.97 

2.95 

3.03 

3.09 

3.04

630 

590 

534 

499 

527 

534

ne9

702 

646 

654 

798 

918 

1,060

ne 15

428 

398 

382 

444 

492 

452

June 21

2.87 

2.86 

2.85 

2.84 

2.83 

2.82

326 

319 

313 

307 

300 

294

Supplemental record.- May 18, 6 a.m., 2.05 ft., 158 sec.-ft.; May 19, 2 a.m., 2.09 

ft., 169 sec.-ft.; June 5, 10 p.m., 2.84 ft., 548 sec.-ft.; June 6, 10 p.m., 2.93 ft., 

614 see.-ft.; June 9, 11:30' p.m., 3.55 ft., 1,110 sec.-ft.; June 10, 9 a.m., 3.30 ft., 

690 see.-ft.; June 12, 1 a.m., 3.15 ft., 545 sec.-ft.
228 FLOODS OP HAY-JUKE 1948 IN COLUMBIA RIVER BASIN

Lostlne River near Lostine, Oreg.

Location.- Lat. 45°26', long. 117°26', in NW£ see. 34, T. 1 S., R. 43 E., 3| miles

south of Lostlne and 10 miles upstream from mouth. 

Drainage area.- 70 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

1,350 second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge, 1,960 second-feet 11:30 p.m. June 9 (gage height, 

 TFT feet).

1912-14, 1915, 1925 to April 1948: Discharge, 2,540 second-feet May 27, 1913. 

Remarks.- Flx>w slightly regulated by Mlnam Lake Reservoir.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

185

169

171

174

161

218

317

275

246

226

June

1,170

1,400

1,500

1,310

1,330

1,540

1,650

1,740

1,750

1,700

July

1,110

900

738

676

672

599

602

536

506

524

Day

11

12

13

14

15

16

17

18

19

20

May

210

210

264

277

283

395

569

560

609

635

Jane

1,560

1,330

1,250

1,260

1,300

1,260

1,080

1,010

1,120

1,120

July

575

539

476

431

408

390

365

405

390

340

Day

21

22

23

24

25

26

27

28

ft

30

31

Monthly mean discharge, in second-feet .... ... . ........ .. ....... .....

Runoff, in inches ............................................ ... . ........ .......................................................

May

711

749

766

962

1,180

1,330

1,560

1,640

1,240

1,040

1,050

593

9.77

June

1,070

886

819

889

924

917

962

1,050

1,120

1,190

1,240

19.77

July304

302

302

277

238

218

220

209

190

171

166

444

7.32

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.79 

3.75 

3.68 

3.64 

3.67 

|_ 3.73

592 

580 

559 

547 

556 

574

May 23

4.21 

4.15 

4.11 

4.30 

4.74 

4.91

718 

700 

688 

745 

899 

964

May 29

5.89 

5.74 

5.56 

5.37 

5.31 

5.34

1,360 

1,300 

1,220 

1,150 

1,120 

1,140

June 4

6.00 

5.89 

5.71 

5.60 

5.63 

5.75

1,400 

1,360 

1,280 

1,240 

1,250 

1,300

June 10

7.02 

6.72 

6.39 

6.24 

6.49 

6.66

Ju

5.92 

5.68 

5.43 

5.26 

5.34 

5.44

1,850 

1,730 

1,600 

1,540 

1,640 

1,700

ne!6

1,410

1,310 

1,210 

1,140 

1,180 

1,220

Gage 

height Discharge

May 18

3.75 

3.72 

3.65 

3.62 

3.65 

3.71

580 

571 

550 

541 

550 

568

May 24

4.82 

4.68 

4.60 

4.81 

5.28 

5.51

928 

878 

850 

924 

1,110 

1,200

May 30

5.24 

5.08 

4.94 

4.93 

5.16 

5.29

Ju

5.76 

5.64 

5.49 

5.61 

6.27 

6.62

1,100 

1,030 

976 

972 

1,060 

1,120

ne5

1,300 

1,260 

1,200 

1,240 

1,510 

1,660

June 11

6.63 

6.44 

6.18 

597 

6.10 

6.18

1,690 

1,620 

1,510 

1,430 

1,480 

1,510

June 17

5.29 

5.10 

4.91 

4.83 

5.04 

5.13

Supplemental record.

1,160 

1,080 

1,020 

990 

1,060 

1,100

Gage 

height Discharge

May 19

3.87 

3.84 

3.79 

3.83 

3.93 

3.94

616 

607 

592 

604 

634 

637

May 25

5.40 

5.25 

5.16 

5.37 

5.82 

5.96

1,160 

1,100 

1,060 

1,150 

1,330 

1,380

May 31

5.21 

5.07 

4.92 

4.90 

5.26 

5.52

1,080 

1,030 

968 

960 

1,100 

1,210

June 6

6.49 

6.23 

5.97 

6.00 

6.60 

6.95

1,610 

1,490 

1,390 

1,400 

1,660 

1,810

June 12

6.05 

5.80 

5.55 

539 

5.56 

5.75

1,460 

1,360 

1,260 

1,200 

1,260 

1,340

June 18

5.05 

4.88 

4.72 

4.67 

4.87 

5.10

1,070 

1,010 

952 

934 

1,000 

1,080

Gage 

height Discharge

May 20

3.91 

3.85 

3.78 

3.85 

4.11 

4.27

628 

610 

589 

610 

688 

736

May 26

5.84 

5.61 

5.49 

5.65 

6.16 

6.41

1,340 

1,240 

1,200 

1,260 

1,460 

1,570

June 1

5.47 

5.31 

5.15 

5.23 

5.75 

6.10

1,190 

1,120 

1,060 

1,090 

1,300 

1,440

June 7

6.76 

6.50 

6.25 

6.34 

6.78 

6.95

1,730 

1,610 

1,500 

1,540 

1,740 

1,810

June 13

5. 65 

'5.46 

5.29 

5.28 

5.63 

5.88

1,300 

1,220 

1,160 

1,150 

1,290 

1,390

June 19

5.10 

5.04 

5.07 

5.18 

5.43 

5.59

1,080 

1,060 

1,070 

1,110 

1,210 

1,280

Gage 

height Discharge

May 21

4.25 

4.16 

4.08 

4.05 

4.24 

4.39

730 

703 

679 

670 

727 

776

May 27

6.34 

6.16 

5.99 

6.23 

6.85 

7.06

1,540 

1,460 

1,400 

1,498 

1,770 

1,860

June 2

6.02 

5.85 

5.66 

5.71 

6.34 

6.70

1,410 

1,340 

1,260 

1,280 

1,540 

1,700

June 8

6.84 

6.68 

6.53 

6.57 

7.02 

7.16

Ju

5.78 

5.54 

5.31 

5.26 

5.64 

5.82

1,760 

1,690 

1,620 

1,640 

1,840 

1,910

nel4

1,350 

1,260 

1,150 

1,140 

1,300 

1,370

June 20

5.43 

5.22 

5.07 

5.00 

5.06 

5.13

1,210 

1,130

1,070 

1,050 

1,070 

1,100

Gage 

height Discharge

May 22

4.42 

4.37 

4.28 

4.22 

4.23 

4.25

787 

770 

739 

721 

724 

730

May 28

7.00 

6.80 

6.56 

6.32 

6.13 

6.01

1,840 

1,740 

1,640 

1,530 

1,450 

1,400

June 3

6.63 

6.40 

6.15 

5.97 

5.92 

6.00

Jl

6.95 

6.67 

6.41 

6.52 

7.06 

7.26

1,670 

1,560 

1,460 

1,390 

1,370 

1,400

ne9

1,810 

1,690 

1,570 

1,620 

1,860 

1,950

June 15

5.81 

5.63 

5.43 

5.42 

5.78 

6.00

Ju

5.12 

5.17 

5.15 

5.00 

4.90 

4.81

1,360 

1,290 

1,210 

1,210 

1,350 

1,440

ne21

1,090 

1,110 

1,100 

1,050 

1,020 

984

- June 6, 2 p.m., 5.90 feet, 1,360 sec. -ft.; June 7, 2 p.m., 6.22

ft , 1,490 sec. -ft.; June 9, 1 p.m., 6.37 ft., 1,550 sec. -ft., 11:30 p.m. 7.27 ft., 

1,960 sec. -ft. ; June 12, 6 p.m., 5.43 ft., 1,210 sec. -ft.; June 15, 2 p.m., 5.38 ft., 

1,190 sec. -ft.
GRANDE ROMDE RIVER BASIN 229

Bear Creek near Wallowa, Oreg.

Location.- Lat. 45°32', long. 117 0 33 ! in sec. 34, T. IN., R. 42 E. , at bridge

miles southwest of Wallowa. 

Drainage area.- 68 square miles. 

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current -meter measurements. 

Maxima.- May- June 1948: Discharge, 1,180 second-feet 4 a.m. June 11 (gage height, 3.29

1915, 1924 to April 1948: Discharge, 1,620 second-feet Apr. 22, 1936 (gage 

height, 3.82 feet, from f loodmarks ) , from rating curve extended above 950 secondfeet. 

Remarks . - Small diversions above station for Irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

202

194

198

226

226

270

381

365

325

298

June

554

729

980

964

917

1,020

1,040

1,020

1,010

1,040

July

512

412

356

335

325

280

270

232

209

200

Day

11

12

13

14

15

16

17

18

19

20

May

280

270

345

370

370

437

519

491

539

631

June

1,110

923

898

853

844

770

567

642

676

656

July

214

180

153

136

119

105

97

111

105

97

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet..... ................. ............................ .. ............

Runoff, in inches ............................................................................................................................

May

596

611

634

673

772

' 926

977

765

659

582

536

8.02

June

794

653

597

590

590

597

558

564

570

584

12.75

July

84

71

66

59

53

50

51

61

56

52

46

2.79

Gage height, in feet, and discltarge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.36 

2.34 

2.35

Ms

2.52 

2.52 

2.49 

2.51 

2.62 

2.62

Mi

2.72 

2.64 

2.56 

2.52 

2.50 

2.47

521 

509 

515

ty23

623 

623 

604 

616 

689 

689

»y29

759 

703 

649 

623 

610 

590

June 4

3.07 

3.05 

3.01 

2.96 

2.96 

2.92

1,010 

998 

968 

945 

930 

900

June 10

3.15 

3.11 

3.08 

3.07 

3.09 

3.19

1,070 

1,040 

1,020 

1,010 

1,030 

1,100

June 16

2.66 

2.85 

2.76 

2.61 

2.67 

2.65

645 

838 

772 

657 

709 

695

Gage 

height Discharge

May 18

2.31 

2.29 

2.31

491 

479 

491

May 24

2.58 

2.56 

2.55 

2.58 

2.65 

2.69

Mi

2.44 

2.47 

2.45

662 

649 

642 

662 

710 

738

>y30

571 

590 

578

June 5

2.87 

2.83 

2.80 

2.95 

3.12 

3.23

Ju

3.29 

3.25 

3.21 

3.20 

3.15 

3.06

864 

836 

815 

922 

1,050 

1,130

ne 11

1,180 

1,150 

1,120 

1,110 

1,070 

1,010

June 17

2.55 

2.42 

2.38 

2.40 

2.47 

2.47

625 

538 

512

525 

570 

570

Gage 

height Discharge

May 19

2.37 

2.40 

2.48

527 

545 

597

May 25

2.72 

2.67 

2.67 

2.70 

2.85 

2.94

Mi

2.39 

2.34 

2.39

759 

724 

724 

745 

850 

915

>y31

539 

509 

539

June 6

3.15 

3.06 

3.00 

3.00 

3.08 

3.20

1,070 

1,000 

960 

960 

1,020 

1,110

June 12

2.98 

2.91 

2.91 

2.92 

3.03 

2.99

935 

882 

882 

890 

974 

942

June 18

2.54 

2.55 

2.57 

2.55 

2.65 

2.71

616 

625 

639 

625 

695 

737

Gage 

height Discharge

May 20

2.53 

2.56 

2.53

630 

649 

630

May 26

2.94 

2.93 

2.94 

3.04 

2.97 

2.88

Ju

2.40 

2.44 

2.44 

2.39 

2.40 

2.44

Ju

3.14 

3.07 

3.03 

3.09 

3.16 

3.10

915 

908 

915 

990 

938 

871

ne 1

545 

57.1 

571 

539 

545 

571

ne 7

1,060 

1,010 

982 

1,030 

1,060 

1,040

June 13

2.95 

2.87 

2.85 

2.91 

3.02 

2.97

912 

852 

838 

862 

966 

928

June 19

2.60 

2.52 

2.54 

2.56 

2.79 

2.74

660 

604 

618 

632 

793 

756

Gage 

height Discharge

May 21

2.49 

2.43 

2.50

604 

564 

610

May 27

2.98 

3.00 

2.97 

2.96 

3.17 

3.23

945 

960 

938 

930 

1,090 

1,130

June 2

2.65 

2.64 

2.58 

2.60 

2.81 

3.09

Ju

3.02 

3.00 

3.09 

3.13 

3.15 

3.13

710 

703 

662 

675 

822 

1,030

ne8

975 

960 

1,030 

1,060 

1,070 

1,060

June 14

2.93 

2.86 

2.80 

2.88 

2.87 

2.80

898 

845 

800 

860 

852 

800

June 20

2.60 

2.55 

2.52 

2.53 

2.63 

2.73

660 

625 

604 

611 

681 

751

Gage 

height

Ms

2.50 

2.50 

2.51

Ma

3.05 

2.82 

2.65 

2.48 

2.45 

2.53

Discharge

»y22

610 

610 

616

y28

998 

829 

708 

597 

578 

630

June 3

3.17 

3.08 

3.00 

2.93 

2.92 

3.01

Ju

3.10 

3.02 

3.00 

3.02 

3.10 

3.17

1,090 

1,020 

960 

908 

900 

968

ne9

1,040 

975 

960 

975 

1,040 

1,090

June 15

2.79 

2.81 

2.86 

2.89 

2.95 

2.90

793 

808 

845 

868 

912 

875

June 21

2.80 

2.87 

2.84 

2.77 

2.74 

2.72

800 

852 

830 

779 

758 

744
230 FLOODS OP MAY-JTJME 1948 IN COLUMBIA RIVER BASIN

Asotin Creek Basin

Asotin Creek near Asotin, Wash.

Location.- Lat. 46°20', long. 117°12', in sec. 20, T. 10 N., R. 45 E., half a mile 

upstream from Washington Water Power Co.'s diversion for water supply and irrigation, 4 miles upstream from George Creek, and 8 miles west of Asotin.

Drainage area.- 171 square miles.

Gage-height record.- Staff gage read twice daily.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used May 1 to July 31. Gage height used to hundredths 

May 17 to June 21; half tenths above and hundredths below 1.0 feet May 1-16, June 

22 to July 31.

Maxima.- May-June 1948: Discharge observed, 511 second-feet 8 a.m. May 28 (gage 

Height, 2.80 feet).

1904-6, 1910-11, 1928 to April 1948: Discharge observed, 1,180 second-feet Apr. 

15, 1904 (gage height, 4.3 feet, datum then In use).

Remarks.- Diversions above station for irrigation. No regulation. Gage-height 

record furnished by Washington Water Power Co.

Mean discharge, in secondDay

1

2

3

4

5

6

7

8

9

10

May

149

138

128

138

138

149

197

184

184

197

June

362

377

398

370

333

326

320

320

304

296

July

70

67

63

60

65

61

63

60

57

55

Day

11

\?,

13

14

15

16

17

18

19

20

May

210

238

300

333

300

284

323

300

313

360

June

262

210

205

172

193

202

165

149

134

130

feet, 1948

July

56

55

52

51

50

48

47

47

50

54

Day

21

22

23

24

25

26

27

28

29

31)

31

Monthly mean discharge, in second-feet

Runoff, in inches ...........................................................................................................................

May

378

391

380

374

398

436

489

493

450

398

384

295

1.99

June

120

118

100

97

90

86

81

77

74

74

205

1.34

July

50

47

46

45

44

44

44

50

48

46

43

528

0.36

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

8

5

8

5

8

5

8

5

8

5

8

5

8

5

8

5

8

5

Gage 

height Discharge

May 17

2.28

2.24

330

316

May 18

2.20

2.18

303

297

May 19

2.20

2.28

303

323

May 20

2.38

2.36

364

357

May 21

2.35

2.50

353

404

May 22

2.38

2.54

364

418

May 23

2.44

2.42

384

377

May 24

2.48

2.34

398

350

May 25

2.50

2.46

404

391

Hour

8

5

8

5

8

5

8

5

8

5

8

5

8

5

8

5

8

5

Gage 

height Discharge

May 26

2.58

2.60

432

440

May 27

2.78

2.70

503

475

May 28

2.80

2.70

511

475

May 29

2.64

2.64

450

450

May 30

2.54

2.46

412

384

May 31

2.50

2.44

394

374

June 1

2.45

2.38

374

350

June 2

2.50

2.46

384

370

June 3

2.58

2.54

404

391

Hour

8

5

8

5

8

5

8

5

8

5

8

5

8

5

8

5

8

5

Gage 

height Discharge

June 4

2.54

2.46

384

357

June 5

2.42

2.40

336

330

June 6

2.42

2.40

330

323

June 7

2.44

2.38

330

310

June 8

2.46

2.40

330

310

June 9

2.42

2.38

310

297

June 10

2.43

2.36

307

284

June 11

2.32

2.30

265

259

June 12

2.18

2.12

218

202

Hour

8

5

8

5

8

9

10

5

8

5

8

5

8

5

8

5

8

5

8

5

Gage 

height

June

2.12

2.18

June

2.08

2.00

June

2.10

2.16

2.14

2.18

June

2.16

2.20

June

2.06

2.00

June

1.98

1.94

June

1.90

1.88

June

1.84

1.90

June

1.84

1.80

Discharge

13

197

213

14

182

162

15

182

197

192

202

16

197

207

17

172

158

18

153

145

19

136

132

20

124

136

21

124

116
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 231

Clearwater River Basin

Selway River above Meadow-Creek, near Lowell, Idaho

Location.- Lat. 46°03', long. 115 0 18', In sec. 11, T. 31 N., R. 9 E., a quarter of a 

mile upstream from Meadow Creek, If miles upstream from Selway Palls, 13 miles upstream from gaging station on Selway River near Lowell, and 16.5 miles southeast of 

Lowell post office.

Drainage area.- 1,550 square miles.

Sage"-helght record.- Water-stage recorder graph except period 11 p.m. May 19 to 1:10 

p.m. July 12, when there was no gage-height record. Staff gage read June 3, 10, 25.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

22,800""second-feet and extended to peak stage on basis of slope-area measurement. 

Discharge for periods of no gage-height record computed on basis of records for 

station near Lowell. Shifting-control method used June 25, July 12-31.

Maxima.- May-June 1948: Discharge, 42,000 second-feet May 29 (gage height, 22.4 feet, 

from floodmark), by slope-area method.

1944 to April 1948: Discharge, 33,200 second-feet May 8, 1947 (gage height, 

18.85 feet, from floodmark).

Remarks.- Small diversions to Bltterroot River Basin from headwaters are reported and 

are shown on maps In T. 32 N., R. 16 E.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

6,570

5,830

5,530

5,800

5,340

5,980

8,440

8,790

7,780

7,110

June

26,000

27,500

28,600

25,000

21,000

21,500

22,000

22,000

20,500

18,600

July

5,000

4,800

4,300

3,900

3,650

3,400

3,200

3,000

2,800

2,650

Day

11

12

18

14

15

16

17

18

19

20

May

7,020

7,210

8,240

8,600

8,260

9,510

12,800

17,100

18,100

23,500

June

18,000

15,500

15,000

13,000

12,000

11,500

10,000

9,000

3,500

8,200

July

2,500

2,490

2,340

2,200

2,080

1,960

1,880

1,870

1,980

2,280

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

23,700

26,000

22,000

21,500

25,000

27,000

30,000

32,500

36,500

30,000

27,500

15,780

11.74

June

9,400

9,600

8,000

7,400

7,200

6,600

6,000

5,600

5,400

5,200

14,130

10.17

July

2,230

1,940

1,770

1,650

1,560

1,460

1,420

1,720

2,420

2,240

1,930

2,536

1.89
FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Selway River near Lowell, Idaho

Location.- Lat. 46"OS 1 , long. 115°31', In sec. 25, T. 32 N., R. 7 E., a quarter of a

mile upstream from 0'Kara Creek and 7 miles upstream from Lowell post office. 

Drainage area.- 1,910 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

31,600 second-feet and extended to peak stage. Shifting-control method used May 1

to July 31.

Maxima.- May-June 1948: Discharge, 48,900 second-feet 4 a.m. May 29 (gage height, T6~70~4 feet).

1929 to April 1948: Discharge, 37,000 second-feet May 8, 1947 (gage height,

13.71 feet). 

Remarks.- No regulation or diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

8,470

7,670

7,250

7,640

7,030

7,910

10,900

11,200

10,200

9,320

June

31,000

32,200

33,600

29,900

26,200

27,000

28,200

28,000

26,000

24,100

July

6,370

6,120

5,390

4,980

4,670

4,330

4,060

3,790

3,540

3,360

Day

11

\?,

13

14

15

16

17

18

19

20

May

9,190

9,420

10,700

11,200

10,800

12,000

15,700

20,400

21,300

28,400

June

23,200

19,800

19,100

16,800

15,000

14,500

13,000

11,300

10,800

10,400

July

3,220

3,180

2,940

2,740

2,600

2,480

2,360

2,380

2,550

3,040

Day

21

W,

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .. ...... ...................................

Runoff, in inches ................................................. .. ................................................................

Msy

29,000

31,400

27,400

26,600

30,300

34,100

37,100

41,400

45,300

35,900

31,500

19,570

11.81

June

12,000

12,300

10,300

9,550

9,100

8,380

7,670

7,190

6,900

6,580

17,670

10.32

July

2,870

2,420

2,190

2,050

1,930

1,840

1,810

2,430

3,450

2,940

2,480

3,242

1.96

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

9.27 

9.37 

9.37 

9.52 

9.98 

10.56

14,500 

14,900 

14,900 

15,600 

17,500 

20,000

May 23

12.59 

12.34 

12.06 

11.88 

12.01 

12.22

Mi

16.04 

15.84 

15.47 

15.07 

14.79 

14.60

Jl

12.95 

12.64 

12.33 

12.08 

11.98 

11.95

29,200 

28,000 

26,700 

25,800 

26,400 

27,400

»y29

48,900 

47,800 

45,800 

43,600 

42,200 

41,100

ne4

32,500 

31,000 

29,400 

28,200 

27,700 

27,600

June 10

11.60 

11.18 

10.83 

10.73 

11.00 

11.25

26,200 

24,200 

22,600 

22,100 

23,400 

24,500

June 16

9.19 

9.11 

8.95 

8.84 

8.84 

8.87

15,400 

15,100 

14,500 

14,000 

14,000 

14,100

Gage 

height DischargeMay 18

10.85 

10.82 

10.73 

10.62 

10.59 

10.67

21,100 

20,900 

20,500 

20,000 

19,900 

20,300

May 24

12.10 

11.85 

11.63 

11.75 

12.33 

12.86

M:

14.21 

13.78 

13.38 

13.14 

13.26 

13.28

Ju

11.82

11.60 

11.38 

11.33 

11.60 

11.91

26,900 

25,700 

24,700 

25,200 

28,000 

30,600

»y30

39,000 

36 , 800 

34,700 

33,400 

34,100 

34,200

ne5

27,200 

26,200 

25,100 

24,900 

26,200 

27,600

June 11

11.23 

10.95 

10.78 

10.79 

10.93 

10.96

24,400 

23,100 

22,300 

22,400 

23,000 

23,200

June 17

8.84 

8.72 

8.57 

8.42 

8.36 

8.34

14,000 

13,500 

13,000 

12,400 

12,200 

12,100

Gage 

height Discharge

May 19

10.75 

10.69 

10.60 

10.70 

11.27 

12.18

20,600 

20,400 

20,000 

20,400 

23,000 

27,300

May 25

12.85 

12.60 

12.35 

12.53 

13.19 

13.77

Mi

13.05 

12.73 

12.45 

12.36 

12.72 

12.96

30,500 

29,300 

28,100 

28,900 

32,200 

35,200

iy31

33,000 

31,400 

30,000 

29,600 

31,400 

32,600

June 6

11.90 

11.65 

11.38

11.50 

12.04 

12.37

Ju

10.67 

10.32 

10.04 

9.86 

9.89 

9.99

27,600 

26,400 

25,100 

25,700 

28,300 

29,900

ne!2

21,800 

20,300 

19,300 

18,300 

18,400 

18,800

June 18

8.32 

8.22 

8.11 

8.01 

7.99 

8.04

12,000 

11,600 

11,200 

10,900 

10,800 

J.1,000

Gage 

height Discharge

May 20

12.64 

12.54 

12.25 

12.20 

12.44 

12.69

29,500 

29,000 

27,600 

27,400 

28,500 

29,700

May 26

13.75 

13.43 

13.09 

13.20 

13.32 

14.40

35,000 

33,400 

31,700 

32,200 

35,400 

38,500

June 1

12.89 

12.60 

12.31 

12.29 

12.76 

13.13

Ju

12.19 

11.84 

11.58 

11.74 

12.32 

12.62

32,200 

30,800 

29,300 

29,200 

 31,600 

33,400

ne 7

29,000 

27,300 

26,100 

26,800 

29,600 

31,100

June 13

10.04 

10.13 

10.21 

10.05 

9.97 

9.94

|Ju

8.C8 

8.C6 

8. CO 

7.92 

7.87 

7.83

19,000 

19,400 

19,800 

19,100 

18,700 

18,600

ne!9

11,100 

11,100 

10,800 

10,600 

10,400 

10,400

Gage 

height Discharge

May 21

12.63 

12.41 

12.16 

12.20 

12.77 

13.37

29,400 

28,400 

27,200 

27,400 

30,100 

33,100

May 27

14.48 

14.04 

13.68 

13.81 

14.60 

15.26

38,400 

36,100 

34,200 

34,800 

38,800 

42,000

June 2

13.09 

12.83 

12.54 

12.57 

13.05 

13.48

33,200 

31,900 

30,500 

30,600 

33,000 

35,200

June 8

12.37 

11.95 

11.61 

11.63 

12.02 

12.13

Jl

9.86 

9.66 

9.44 

9.26 

9.29 

9.36

29,900 

27,800 

26,200 

26,300 

28,200 

28,700

nr 14

18,300 

17,400 

16,500 

15,700 

15,800 

16,100

June 20

7.84 

7.87 

7.88 

7.82 

7.85 

7.94

10,300 10,400" 

10,400 

10,200 

10,300 

10,600

Gage 

height Discharge

May 22

13.40 

13.26 

13.02 

12.76 

12.67 

12.68

33,200 

32,600 

31,400 

30,100 

29,600 

29,700

May 28

14.80 

14.64 

14.31 

14.14 

14.81 

15.57

42,200 

41,300 

39,600 

38,700 

42,200 

46,400

June 3

13.46 

13.30 

13.10 

12.93 

12.99 

13.08

Jl

11.87 

11.52 

11. §1 11.20* 

11.60 

11.84

35,100 

34,300 

33,200 

32,400 

32,700 

33,200

ne9

27,400 

25,800 

24,300 

24,300 

26,200 

27,300

June 15

9.31 

9.16 

9.02 

8.94 

8.92 

9.05

15,900 

15,300 

14,700 

14,400 

14,300 

14,900

June 21

8.07 

8.16 

8.29 

8.43 

8.63 

8.76

11,100 

11,400 

11,900 

12,400 

13,200 

13,700

Supplemental record.- May 19, 2 p.m., 10.59 ft., 19,900 sec.-ft.; May 21, 2 p.m., 

12.11 ft., 26,900 sec.-ft.; May 26, 2 a.m., 13.83 ft., 35,500 sec.-ft., 2 p.m., 13.07 

ft., 31,600 aec.-ft.; May 27, 2 a.m., 14.50 ft.. 39,000 sec.-ft., 2 p.m., 13.67 ft., 

34,100 sec.-ft.; May 28, 1 a.m., 15.01 ft., 42,000 sec.-ft., 2 a.m., 14.79 ft., 42,200 

sec.-ft.j June 1, 2 p.m., 12.25 ft., 29,000 sec.-ft.; June 2, 2 a.m., 13.15 ft., 33,500 

sec.-ft., 2 p.m., 12.49 ft., 30,200 sec.-ft.j June 5, 2 p.m., 11.31 ft., 24,800 sec.- 

ft.j June 6, 2 a.m., 11.95 ft., 27,800 sec.-ft., 2 p.m., 11.35 ft., 25,000 sec.-ft.; 

June 8, 2 p.m., 11.57 ft., 26,000 sec.-ft., 10 p.m., 12.14 ft., 28,700 sec.-ft.; June 9, 

2 p.m., 11.15 ft., 24,000 sec.-ft.; June 11, 2 a.m., 11.30 ft., 24,700 sec.-ft.
CLEARWATER RIVER BASIN 2:

Clearwater River at Kamlah, Idaho

Location.- Lat. 46°14', long. ia6°01', in sec. 1, T. 33 N., R. 3 E., a quarter of a 

mile downstream from highway bridge at Kamiah, three-quarters of a mile downstream 

from Lawyer Creek, and 6 miles downstream from South Pork. (See pi. 12A.)

Drainage area.- 4,860 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used May 30 to July 31.

Maxima.- May-June 1948: Discharge, 99,000 second-feet 8 a.m. May 29 (gage height,

 T37S2 feet).

1910 to April 1948: Discharge observed, 81,400 second-feet June 10, 1933 (gage 

height, 16.53 feet, former site).

Remarks.- Gage-height record collected in cooperation with U. S. Weather Bureau.

Mean discharge, in sectmd-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

21,500

19,000

17,500

1&,900

17,700

18,500

26,700

31,200

30,800

36,700

June

64,200

65,400

68,800

62,700

54,500

52,900

55,600

55,900

52,200

49,800

July

13,800

13,100

11,700

10,900

10,200

9,520

8,740

8,280

7,740

7,240

Day

11

12

13

14

15

16

17

18

19

20

May

26., 700

25,300

29,500

31,900

29,000

30,700

36,900

47,400

47,800

59,500

June

46,800

42,500

38,800

36,100

31,600

30,500

28,300

24,400

23,400

21,800

July

6,840

6,710

6,250

5,820

5,520

5,250

5,040

4,970

5,390

6,140

Day

21

22

28

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................... ............

Runoff, "in inches ........................ ....................... ........... . ...............................................

May

61,100

77,800

66,800

61,800

65,600

72,200

77,700

86,800

94,000

77,300

67,400

10.75

June

24,900

28,100

24,000

21,900

20,600

19,000

17,300

16,000

15,200

14,200

8.49

July

6,140

5,170

4, £20

4,320

4,060

3,850

3,790

5,010

8,150

6,540

5,370

6,973

1.66

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

s

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

^height Discharge

May 17

11.74 

11.99 

12.13 

12.17 

12.27 

12.74

34,500 

36,300 

37,400 

37,600 

38,400 

42,000

May 23

16.10 

15.94 

15.60 

15.31 

15.21 

 5.25

M,

18.95 

19.22 

18.99 

18.54 

18.22 

17.94

Jl

15.74 

15.65 

15.37 

15.13 

14.98 

14.86

70,600 

69,200 

66,100 

63,500 

62,600 

63,000

iy29

96,600 

99,000 

96,900 

92,900 

89,900 

87,400

ne4

66,000 

65,200 

62,700 

60,600 

59,300 

58,200

June 10

14.39 

14.35 

13.96 

13.56 

13.39 

13.55

Ju

11.60 

11.35 

11.27

53,800 

53,400 

50,200 

46,900 

45,500 

46,800

nel6

31,500 

29,900 

29,400

Gage 

height Discharge

May 18

13.24 

13.56 

13.65 

13.58 

13.46 

13.39

45,900 

48,500 

49,300 

48,700 

47,700 

47,100

May 24

15.32 

15.22 

15.13 

14.87 

14.93 

15.27

63,600 

62,700 

61,900 

59,600 

60,100 

63,100

May 30

17.65 

17.27 

16.76 

16.28 

16.16 

16.36

Ju

14.78 

14.67 

14.47 

14.22 

14.10 

14.27

Jl

13.70 

13.78 

13.63 

13.36 

13.32 

13.42

84,300 

80,800 

76,200 

71,800 

70,700 

72,500

ne 5

57,100 

56,200 

54,500 

52,300 

51,400 

52,800

nell

48,000 

48,700 

47,500 

45,300 

45,000 

45,900

June 17

11.31 

11.18 

11.07 

10.81 

10.69

29,600 

28,800 

28,100 

26,500 

25,700

Gage 

height Discharge

May 19

13.39 

13.42 

13.38 

13.34 

13.51 

14.12

47,100 

47,400 

47,100 

46,700 

48,100 

53,200

May 25

15.69 

15.73 

15.51 

15.31 

15.39 

16.04

66,900 

67,300 

65,300 

63,500 

64,200 

70,100

May 31

16.35 

16.10 

15.75 

15.43 

15.40 

15.65

Jl

14.54 

14.51 

14.28 

14.02 

14.01 

14.39

Ju

13.59 

13.41 

13.08 

12.76 

12.49 

12.44

72,000 

69,700 

66,600 

63,700 

63,400 

65,600

ne6

55,100 

54,800 

52,900 

50,700 

50,600 

53,800

ne!2

46,700 

45,300 

42,700 

40,200 

38,200 

37,800

June 18

10.60 

10.55

10.29 

10.37

24,900 

24,600

23,100 

23,600

Gage 

height Discharge

May 20

14.89 

15.09 

15.02 

14.78 

14.79 

15.04

59,800 

61,500 

60,900 

58,800 

58,900 

61,100

May 26

16.52 

16.56 

16.24 

15.42 

16.06 

16.66

74,500 

74,800 

71,900 

69,000 

70,200 

75,700

June 1

15.85 

15.76 

15.48 

15.19 

15.22 

15.68

Jl

14.86 

14.89 

14.62 

14.23 

14.21 

14.63

67,000 

66,200 

63,700 

61,100 

61,400 

65,500

ne 7

58,200 

58,500 

56,200 

52,900 

52,700 

56,300

June 13

12.49 

12.66 

12.69

38,200 

39,400 

39,700

June 19

10.39 

10.17

23,700 

22,400

Gage 

height Discharge

May 21

15.24 

15.20 

15.02 

14.78 

14.80 

15.36

62,900 

62,500 

60,900 

58,800 

59,000 

63,900

May 27

17.14 

17.13 

16.78 

16.46 

16.72 

17.38

80,100 

80,000 

76,800 

73,900 

76,300 

82,200

June 2

16.03 

15.93 

15.63 

15.33 

15.38 

15.83

Ju

15.03 

15.01 

14.64 

14.24 

14.13 

14.37

68,600 

67,700 

65,000 

62,300 

62,800 

66,800

He 8

59,700 

59,500 

56,300 

52,900 

52,000 

54,000

June 14

12.67 

12.43

11.96 

11.74 

11.69

39,500 

37,700

34,300 

32,800 

32,400

June 20

10.02

10.01 

10.07

21,600

21,500 

21,900

Gage 

height Discharge

May 22

15.99 

16.58 

17.64 

17.78 

17.38 

16.48^

69,600 

75,000 

84,700 

85,900 

82,200 

74,100

May 28

18.08 

18.18 

17.49 

17.64 

17.58 

18.21

Ju

16.21 

16.23 

16.10 

15.93 

15.76 

15.73

88,600 

89,500 

87,800 

84,700 

84,100 

89,800

ne3

70,700 

70,900 

69,700 

68,200 

66,600 

66,400

June 9

14.62 

14.56 

14.20 

13.84 

13.76 

14.03

 55,700 

55,200 

52,200 

49,200 

48,500 

50,800

June 15

11.72

11.56 

11.42 

11.48

32,300

31,200 

30,300 

30,700

June 21

10.17 

10.48

10.82 

11.02

22,400 

24,200

26,200 

27,500

Supplemental record.- May 22, 2 p.m., 17.84 ft., 86,500 sec.-ft.; May 27, 6 a.m., 

17.19 ft. , 80» 500 sec. - ft. 

824933 O - 49 - 17
234 FLOODS OF MAY-JUNE 1948 IK COLUMBIA RIVER BASIN

Clearwater River at Spalding, Idaho

Location.- Lat. 46°25', long. 116°51', in lot 22, sec. 22, T. 36 N., R. 4 W., a quarter

of a mile downstream from Lapwal Creek and three-eighths of a mile northwest of

Spalding post office. 

Drainage area.- 9,570 square miles. 

gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements to

100,000 second-feet; extended to crest stage.

Maxima.- May-June 1948: Discharge, 177,000 second-feet 3 p.m. May 29 (gage height, 

 23776 feet).

1926 to April 1948: Discharge, 172,000 second-feet Dec. 23, 1933, from rating

curve extended above 100,000 second-feet by logarithmic plotting. 

Remarks. - Negligible' amount of diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

42,600

37,700

34,500

37,400

37,000

36,700

50,000

65,300

73,700

63,600

June

118,000

116,000

119,000

115,000

99,900

92,700

93,600

94,100

89,100.

85,600

July

22,300

21,200

19,600

18,000

16,800

15,800

14,800

14,200

13,400

12,500

Pay

11

12

13

14

15

16

17

18

19

20

May

57,600

54,200

58,900

64,800

57,600

56,500

64,700

80,300

82,800

105,000

June

81,000

76,400

65, 200

64,200

54,900

55,200

50,300

43, 900

41,500

38,200

July

12,000

11,600

11,100

10,300

9,820

9,440

9,020

8,650

9,050

11,000

Day

21

22

28

24

25

26

27

28

29

.SO

81

Monthly mean discharge, in second-feet . .. ..... . .

Runoff, in inches ...................................... ..... . .............. .. . ........................................................

May

113,000

142,000

142,000

124,000

124,000

131,000

138,000

150,000

166,000

145,000

127,000

QC QHfi

10.85

June

40,400

46,400

41,100

36,300

33,800

31,700

29,600

27,100

25,200

23,600

7.50

July

11,700

9,890

8,720

8,090

7,620

7,290

7,080

9,440

19,000

14,600

11,100

1.50

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

13.42 

13.83 

14.25 

14.43 

14.41 

14.40

59,100 

62,800 

66,700 

68,500 

68,300 

68,200

May 23

21.76 

21.01 

20.75 

20.43 

20.13 

19.82

Mi

21.82 

22.67 

23.49 

23.74 

23.35 

22.78

Ju

18.92 

18.92 

18.83 

18.57 

18.19 

17.87

152,000 

143,000 

140,000 

136,000 

132,000 

129,000

iy29

153,000 

163,000 

173,000 

176,000 

172,000 

164,000

ne 4

118,000 

118,000 

117,000 

114,000 

110,000 

106,000

June 10

15.88 

16.39 

16.56 

16.30 

15.79 

15.38

83,400 

89,000 

91,000 

88,000 

82,400 

78,000

June 16

13.28 

13.29 

13.03 

12.99 

12.78 

12.57

57,700 

57,800 

55,500 

55,100 

53,200 

51,500

Gage 

height Discharge

May 18

14.78 

15.45 

15.93 

16.13 

16.04 

15.88

72,000 

78,700 

83,900 

86,100 

85,100 

83,400

May 24

19.75 

19.78 

19.64 

19.31 

18.87 

18.74

M

22.22 

21.80 

21.32 

20.71 

20.12 

19.77

Ju

17.68 

17.59 

17.46 

17.19 

16.88 

16.65

128,000 

128,000 

126,000 

123,000 

117,000 

116,000

»y30

157,000 

152,000 

146,000 

139,000 

132,000 

128,000

ne 5

104,000 

103,000 

101,000 

98,100 

94,500 

92,000

June 11

15.36 

15.67 

15.96 

15.87 

15.62 

15.53

77,800 

81,100 

84,300 

83,300 

80,500 

79,500

June 17

12.59 

12.54 

12.55 

12.38 

12.20 

12.09

51,600 

51,200 

51,200 

-49,900 

48,400 

47,600

Gage 

height Discharge

May 19

15.77 

15.76 

15.80 

15.77 

15.80 

16.21

82,200 

82,100 

82,500 

82,200 

82,500 

87,000

May 25

19.14 

19.70 

19.91 

19.67 

19.28 

19.20

121,000 

127,000 

130,000 

127,000 

122,000 

121,000

May 31

19.89 

20.15 

20.00 

19.56 

19.09. 

18.85

Ju

16.69 

16.91 

16.99 

16.80 

16.46 

16.28

129,000 

132,000 

131,000 

125,000 

120,000 

117,000

ne6

92,400 

94,800 

95,800 

93,600 

89,800 

87,800

June 12

15.52 

15.57 

15.49 

15.14 

14.69 

14.27

79,400 

80,000 

79,100 

75,600 

71,100 

66,900

June 18

11.84 

11.70 

11.60 

11.52 

11.43 

11.34

45,600 

44,400 

43,600 

43,000 

42,300 

41,600

kGage 

height Discharge

May 20

16.87 

17.85 

18.38 

18.43 

18.19 

18.10

Mi

19.71 

20.31 

20.57 

20.32 

19.87 

19.80

Ju

18.95 

19.20 

19.25 

18.95 

18.52 

18.32

Ju

16.57 

17.04 

17.23 

16.99 

16.59 

16.40

94,400 

106,000 

112,000 

112,000 

110,000 

108,000

iy26

127,000 

134,000 

137,000 

134,000 

129,000 

128,000

me 1

118,000 

121,000 

122,000 

118,000 

113,000 

111,000

ne7

91,100 

96,300 

98,500 

95,800 

91,300 

89,100

June 13

14.03 

13.99 

14.01 

14.04 

14.18 

14.32

64,600 

64,200 

64,400 

64,700 

66,000 

67,400

June 19

11.29 

11.39 

11.43 

11.37 

11.28 

11.20

41,100 

41,900 

42,200 

41,700 

41,000 

40,400

Gage 

height Discharge

May 21

18.38 

18.78 

18.85 

18.63 

18.33 

18.28

112,000 

116,000 

117,000 

115,000 

111,000 

111,000

May 27

20.32 

20.86 

21.10 

20.86 

20.47 

20.48

Ju

18.60 

19.05 

19.15 

18.88 

18.46 

18.30

Ju

16.70 

17.15 

17.30 

16.99 

16.56 

16.31

Ju

14.33 

14.31 

14.10 

13.87 

13.53 

13.20

134,000 

141,000 

144,000 

141,000 

136,000 

136,000

ne2

114,000 

120,000 

121,000 

118,000 

113,000 

111,000

ne8

92,500 

97,600 

99,300 

95,800 

91,000 

38,100

ne 14

67,500 

67,300 

65,200 

63,100 

60,100 

57,100

June 20

11.06 

10.94 

10.88 

1O.83 

10.81 

10.80

39,200 

38,300 

37,900 

37,500 

37,400 

37,300

Gage 

height

Mi

18.69 

19.45 

20.75 

22.50 

23.31 

22.80

Discharge

iy22

115,000 

124,000 

140,000 

161,000 

171,000 

165,000

May 28

21.11 

21.81 

22.17 

22.02 

21.66 

21.58

144,000 

152,000 

157,000 

155,000 

151,000 

150,000

June 3

18.63 

19.11 

19.28 

19.17 

19.03 

18.93

Ju

16.39 

16.70 

16.76 

16.46 

16.03 

15.77

Ju

13.02 

12.99 

13.01 

12.95 

12.84 

12.70

Ju

10.82 

10.92 

11.17 

11.43 

11.60 

11.77

115,000 

120,000 

122,000 

121,000 

119,000 

118,000

me 9

89,000 

92,500 

93,200 

89,800 

85,000 

82,200

ne!5

55,500 

55,20O 

55,400 

54,800 

53,900 

52,600

ne21

37,500 

38,200 

40,000 

42,100 

43,500 

44,800

Supplemental record.- May 29, 3 p.m., 23.76 ft., 177,000 sec. -ft.
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1080 PLATE 12

A. CLEAR WATER RIVER AT KAMI AH, IDAHO. 

Courtesy of United States Forest Service.

B, FLOOD DAMAGE ON WHITEBIRD CREEK NEAR WHITEBIRD, IDAHO. 

Courtesy of United States Forest Service.

CLSARWATER RIVER BASIN 

Lochaa River near Lovell, Idaho

235

Location.- Lat. 46°09', long. 115°35', In SW£SE£ sec. 33, T. 33 N., R. 7 E., threequarters of a mile upstream from Lovell post office, seven-eighths of a rail" upstream from mouth, and l£ miles downstream from Pete King Creek.

Drainage area.- 1,180 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements 

below 24,700 second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge, 34,600 second-feet 5:30 a.m. May 29 (gage height,

 T3T62 feet).

1929 to April 1948: Discharge, 34,800 second-feet June 10, 1933 (gage height, 

13.44 feet), from rating curve extended above 25,000 second-feet.

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

7,600

6,910

6,700

7,630

7,170

7,840

10,100

9,570

8,700

8,360

June

21,900

22,400

23,100

20,800

18,400

17,800

18,600

18,500

17,600

16,900

July

4,120

3,830

3,490

3,250

3,050

2,840

2,690

2,540

2,390

2,260

Day

11

1?

13

14

15

16

17

18

19

20

May

8,200

8,360

9,880

10,900

10,000

10,900

13,600

15,900

16,100

20,200

June

15,700

14,100

13,200

11,700

10,200

9,700

9,080

7,940

7,450

7,120

July

2,160

2,070

1,950

1,850

1,760

1,670

1,610

1,610

1,650

1,860

Day

21

22

23

24

25

26

27

28

29 30

81

Monthly mean discharge, in second-feet.... ....... ...................................................................

Runoff, in inches ............................................................................................................................

May

22,000

24,800

21,900

21,300

23,500

25,700

27,600

30,000

31,900

24,800

22,400

15,500

15.14

June

8,100

8,430

7,120

6,520

6,180

5,850

5,360

4,960

4,660

4,380

12,120

11.46

July

1,810

1,570

1,430

1,360

1,270

1,210

1,220

1,940

2,440

1,900

1,580

2,141

2.09

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I*i

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

7.90 

7.98 

7.99 

8.15 

8.57 

8.80

12,800' 

13,100 

13,100 

13,600 

15,000 

15,800

May 23

10.69 

10.50 

10.30 

10.20 

10.41 

10.50

M:

13.51 

13.41 

13.00 

12.73 

12.63 

12.27

Ju

10.88 

10.67 

10.42 

10.28 

10.22 

10.18

22,800 

22,100 

21,300 

20,900 

21,700 

22,100

iy29

34,100 

33,600 

31,600 

30,400 

29,900 

28,300

ne4

22,300 

21,500 

20,500 

20,000 

19,800 

19,600

June 10

9.89 

9.64 

9.24 

9.05 

9.10 

9.25

Ju

7.19 

7.10 

7.07 

7.09 

7.10 

7.16

18,600 

17,700 

16,200 

15,600 

15,700 

16,300

ne!6

9,880 

9,650 

9,570 

9,620 

9,650 

9,800

Gage 

height Discharge

May 18

8.97 

8.93

8.82 

8.74 

8.72 

8.70

16,400 

16,300 

15,900 

15,600 

15,500 

15,400

May 24

10.39 

10.17 

9.93 

10.05 

10.62 

10.92

M

11.98 

11.55 

11.24 

11.16 

11.28 

11.30

Ju

10.10 

9.92 

9.67 

9.62 

9.76 

9.85

Ju

9.32 

9.17 

8.95 

8.88 

8.99 

9.17

21,600 

20,800 

19,900 

20,300 

22,500 

23,700

iy30

26,800 

25,000 

23,700 

23,400 

23,900 

24,000

ne 5

19,300 

18,700 

17,800 

17,600 

18,100 

18,400

ne 11

16,500 

16,000 

15,200 

15,000 

15,300 

16,000

June 17

7.09 

7.02 

6.91 

6.74 

6.64 

6.57

9,620 

9,440 

9,160 

8,730 

8,480 

8,300

Gage 

height Discharge

May 19

8.69 

8.61 

8.52 

8.77 

9.46 

9.84

15,400 

15,100 

14,800 

15,700 

18,200 

19,600

May 25

10.98 

10.78 

10.52 

10.68 

11.20 

11.53

M:

11.19 

10.94 

10.67 

10.60 

10.80 

11.00

Ju

9.83 

9.67 

9.43 

9.47 

9.79 

10.07

23,800 

23,000 

22,000 

22,600 

24,700 

26,100

iy3l

23,500 

22,500 

21,500 

21,200 

22,000 

22,800

ne6

18,300 

17,800 

16,900 

17,000 

18,200 

19,200

June 12

9.12 

8.83 

8.49 

8.27 

8.21 

8.19

15,800 

14,800 

13,700 

13,000 

12,800 

12,700

June 18

6.56 

6.49 

6.40 

6.31 

6.29 

6.38

8,280 

8,110 

7,890 

7,680 

7,630 

7,840

Gage 

height Discharge

May 20

9.94 

9.89 

9.84 

9.97 

10.24 

10.40

19,900 

19,700 

19,600 

20,000 

21,100 

21,700

May 26

11.62 

11.41 

11.18 

11.36 

11.69 

11.99

Ju

10.97 

10.77 

10.50 

10.53 

10.88 

11.15

Ju

10.13 

9.90 

9.63 

9.68 

9.94 

10.22

26,200 

25,300 

24,400 

25,100 

26,500 

27,800

ne 1

22,700 

21,900 

20,800 

20,900 

22,300 

23,400

ne7

19,400 

18,600 

17,600 

17,800 

18,700 

19,800

June 13

8.2.. 

8.33 

8.42 

8.46 

8.37 

8.28

12,800 

13,200 

13,400 

13,600 

13,300 

13,000

June 19

6.35 

6.28 

6.20 

6.14 

6.11 

6.06

7,770 

7,600 

7,410 

7,270 

7,200 

7,080

Gage 

height Discharge

May 21

10.37 

10.39 

10.25 

10.33 

10.75 

11.30

21,600 

21,600 

21,100 

21,400 

23,100 

25,300

May 27

12.04 

11.82 

11.61 

11.82 

12.27 

12.70

Ju

11.13 

10.92 

10.63 

10.68 

10.96 

11.23

Ju

10.23 

9.95 

9.63 

9.58 

9.76 

9.97

Ju

8.20 

8.01 

7.79 

7.61 

7.55 

7.53

27,800 

26,900 

25,900 

26,800 

28,800 

30,800

Jie2

23,300 

22,500 

21,300 

21,500 

22,600 

23,700

ne8

19,800 

18,800 

17,600 

17,400 

18,100 

18,900

ne 14

12,800 

12,200 

11,500 

11,000 

10,900 

10,800

June 20

6.04 

6.02 

6.03 

6.06 

6.15 

6.26

7,030 

6,980 

7,000 

7,080 

7,290 

7,560

Gage 

height Discharge

May 22

11.38 

11.40 

11.24 

1L.05 

10.89 

10.82

25,600 

25,700 

25,100 

24,300 

23,600 

23,300

May 28

12.80 

12.63 

12.35 

12.20 

12.53 

13.42

Ju

11.30 

11.17 

11.06 

10.98 

10.92 

10.91

Ju

9.95 

9.66 

9.36 

9.28 

9.53 

9.91

30,900 

30,200 

28,900 

28,200 

29,700 

33,900

ne3

24,000 

23,500 

23,000 

22,700 

22,500 

22,400

ne9

18,800 

17,700 

16,600 

16,400 

17,300 

18,600

June 15

7.49- 

7.38 

7.26 

7.15 

7.10 

7.17

10,700 

10,400 

10,100 

9,780 

9,650 

9,830

June 21

6.25 

6.35 

6.48 

<£.63 

6.73 

6.68

7,530 

7,770 

8,080 

8,460 

8,700 

8,580

8.55 ft., 14,900 sec.-ft.; May 21, 2 p.m., 

2 p.m., 9.91 ft., 19,800 sec.-ft.; May 25, 2 a.m.,

Supplemental record.- May 19, 2 p.

10.20 ft. , 20,900 SeC.-ft.; May 24, 2 p.m., 3.3J. J.o., ±s,ouu HCU.-IU.J nay to, £ a.m.,

"1.00 ft., 23,900 sec.-ft., 2 p.m., 10.48 ft., 21,800 sec.-ft.; May 26, 2 p.m., 11.14 

t., 24,200 sec.-ft.; May 29, 2 a.m., 13.57 ft., 34,300 sec.-ft., 5.30 a.m., 13.62 ft., 

4,600 sec.-ft.; June 1, 2 p.m., 10.45 ft., 20,600 sec.-ft.; June 2, 2 a.m., 11.18 ft.,

^ n;nn aor* _ft > n m Id GC1 ft- OT 9nn oan _* <- Tuna ^ 5am 11 VI ft: PA nni~l

11.00 ft., 

ft.

34, sec.-.; une , p.m., . ., , sec.-.; une , a.., . ., 

23,500 sec.-ft., 2 p.m., 10.60 ft.. 21,200 sec.-ft.; June 3, 2 a.m., 11.30 ft., 24,000 

sec.-ft.; June 6, 2 p.m., 9.40 ft., 16,800 sec.-ft.; June 7, 2 p.m., 9.58 ft., 17,400 

sec.-ft.; June 9, 2 a.m., 10.00 ft., 19,000 sec.-ft.; June 10, 2 a.m., 9.97 ft., 18,900 

see.-ft.; June 11, 3 a.m., 9.35 ft., 16,600 sec.-ft.; June 13, 2 p.m., 8.48 ft., 13,600 

sec.-ft.
FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

South Pork Clearvrater River near Elk City, Idaho

Location.- Lat. 45°49', long. 115°32', in WE£ see. 25, T. 29 N., R. 7 E., at bridge

on road to Orogrande, 0.2 mile upstream from Crooked River and 4j miles west of

Elk City.

Drainage area.- 261 square miles. 

Gage-height record.- Wire-weight gage read twice daily except Sundays and except May

27-29,when gape was read once daily. 

Discharge record.- Stage-discharge relation defined by current-meter measurements

below 2,890 second-feet -and extended to peak stage. Discharge for periods of no

gage-height record computed on basis of records for station near Grangeville. 

Maxima.- May-June 1948: Discharge observed, 3,700 second-feet 7:35 a.m. May 29 (gage

height, 13.06 feet).

1944 to April 1948: Discharge observed, 2,2QO second-feet May 9, 1947 (gage

height, 11.86 feet). 

Remarks.- No diversion or regulation above station except for mining operations.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,070

950

898

898

860

881

1,660

1,560

1,450

1,370

June

2,060

1,800

1,760

1,620

1,430

1,400

1,250

1,150

1,130

1,040

July

446

446

367

350

329

312

277

265

240

230

Day

11

}?.

13

14

15

16

17

18

19

20

May

1,330

1,340

1,430

1,620

1,530

1,700

2,200

2,540

2,240

2,810

June

1,050

925

800

700

640

640

645

545

545

520

July

225

219

200

193

184

179

176

190

206

281

Day

21

22

28

24

25

26

87

28

29

30

31

Monthly mean discharge, in second-feet . . .

Runoff, in inches ..................................................... . ..................................................

May

2,800

3,390

3,000

2,700

2,620

2,820

2,900

2,750

3,700

2,750

2,250

2,001

8.84

June

892

930

876

710

670

660

600

550

500

460

950

4.06

July

209

149

112

86

85

85

88

181

308

173

147

224

.99

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

7:30

4:05

7:25

4:20

7:20

4:20

7:30

4:35

7:25

4:10

7:25

6:20

7:25

1

2:15

4:45

Gage 

height

Ma

11.78

11.36

Discharge

7 17

2,110

2,300

May 18

12.38

11.98

2,780

2,320

May 19

11.88

11.94

Ma

12.44

12.38

2,210

2,270

y 20

2,850

2,780

May 21

12.42

12.38

2,820

2,780

May 22

12.86

12.84

3,400

3,380

May 24

12.18

12.55

12.40

12.14

2,540

2,980

2,800

2,490

Hour

7:30

4:50

7:25

4:40

7:30a

l:40p

7:35a

7:25

4:40

9:45

4:30

7:25

4:45

£& | Discharge

May 25

12.22 2,580

12.28 2,660

May 26

12.42 2,820

12.42 2,820

May 27

12.48 2,900

May 28

12.36 2,750

May 29

13.06 3,700

May 31

11.96 2,300

11.88 2,210

June 1

11.88 2,210

11.58 1,920

June 2

11.50 1,850

11.38 1,740

Hour

7:25

4:40

7:20

4:50

7:25

4:30

7:30

4:25

7:25

4:25

7:30

4:30

7:20

4:10

7:30

4:40

Gage 

height

JUl

11.38

11.42

Discharge

tie 3

1,740

1,780

June 4

11.24

11.20

1,630

1,600

June 5

10.98

10.92

Jli]

10.68

10.64

1,450

1,410

ne 7

1,260

1,230

June 8

10.52

10.48

1,160

1,140

June 9

10.46

10.46

1,130

1,130

June 10

10.32

10.28

Jui

10.28

10.36

1,050

1,020

le 11

1,020

1,070

Hour

7:20

4:20

7:20

4:45

7:20

4:35

7:25

4:40

7:25

4:30

7:30

4:35

7:20

4:30

7:25

4:45

Gage 

height

June

10.08

10.12

Discharge

3 I'd

914

936

June 14

9.70

9.64

715

685

June 15

9.58

9.52

June

9.50

9.60

655

615

3 16

615

665

June 17

9.58

9.54

655

635

June 18

9.38

9.34

555

535

June 19

9.40

9.32

June

9.96

10.14

565

525

s 21

845

942
CLEARWATER RIVER BASIN

South Pork Clearwater River near Orangevllle, Idaho

Location.- Lat. 45°55', long. 1160 01', In SE^NWi sec. 30, T. 30 N., R. 4 E., Just

downstream from powerhouse of Washington Water Power Co., 6 miles southeast of

Orangevllle .

Drainage area.- 865 square miles. 

Gage-height record.- Water-stage recorder graph May 1-27, July 10-31. Staff gage

read twice dally May 28 to July 9; graph based on gage readings used May 28-31. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Shifting-control method used June 23 to July 31. 

Maxima.- May-June 1948: Discharge, 12,600 second-feet 8 a.m. May 29 (gage height,

12.50 feet, from graph based on gage readings).

1910-16, 1923 to April 1948: Discharge observed, 9,830 second-feet May 30,

1912 (gage height, 9.7 feet), from rating curve extended above 6,500 second-feet. 

Remarks . - Diurnal fluctuation at low flow caused by power plant Just above station.

Ho diversion for Irrigation. Water-stage recorder Inspected and gage readings

furnished by Washington Water Power Co. In connection with a Federal Power

Commission project.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

2,970

2,670

2,500

2,530

2,390

2,770

4,360

4,490

4,280

4,070

June

7,960

7,880

8,580

7,410

6,640

6,450

6,450

6,450

6,000

5,600

July

2,360

2,190

1,980

1,860

1,680

1,520

1,430

1,350

1,260

1,120

Day

11

12

13

14

15

16

17

18

19

20

May

3,930

3,950

4,460

5,190

5,070

5,120

6,410

7,440

7,320

8,130

June

5,410

4,890

4,890

4,300

3,850

3,850

3,590

3,240

3,210

2,980

July

1,050

1,010

946

886

840

802

759

840

940

1,100

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . .. . ..... ................... . ................... . .................

Runoff, in inches ..........................................................................................................................

May

8,340

10,200

10,200

9,800

9,850

10,100

10,300

10,600

11,300

9,300

8,580

6,407

8.54

June

4,600

4,820

4,200

3,900

3,630

3,280

2,980

2,730

2,520

2,350

4,821

6.22

July

892

759

683

632

600

573

583

1,030

1,430

899

747

1,121

1.49

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

8.89 

9.12 

9.25 

9.31 

9.72 

9.92

M£

11.57 

11.44 

11.36 

11.40 

11.50 

11.44

5,920 

6,220 

6,380 

6,460 

7,010 

7,290

iy23

10,400 

10,100 

9,910 

10,000 

10,200 

10,100

May 29

12.12 

12.50 

12.07 

11.82 

11.66 

11.57

11,700 

12,600 

11,500 

11,000 

10,600 

10,400

Gage 

height Discharge

May 18

10.11 

10.11 

10.06 

9.97 

9.91 

9.98

7,580 

7,580 

7,500 

7,360 

7,280 

7,380

May 24

11.37 

11.30 

11.22 

11.21 

11.33 

11.38

9,930 

9,780 

9,610 

9,590 

9,850 

9,960

May 30

11.33 

11.10 

10.81 

10.77 

11.00 

11.12

9,850 

9,360 

8,790 

8,710 

9,160 

9,400

Gage 

height Discharge

May 19

9.86 

9.83 

9.81 

9.81 

10.12 

10.38

7,200 

7,160 

7,130 

7,130 

7,590 

8,020

May 25

11.31 

11.28 

11.26 

11.32 

11.38 

11.50

Mi

11.03 

10.80 

10.45 

10.37 

10.60 

10.68

9,800 

9,740 

9,700 

9,820 

9,960 

10,200

iy31

9,220 

8,770 

8,140 

8,000 

8,400 

8,540

Gage 

height Discharge

May 20

10.49 

10.58 

10.37 

10.25 

10.48 

10.64

8,200 

8,360 

8,000 

7,800 

8,190 

8,470

May 26

11.44 

11.40 

11.36 

11.41 

11.56 

11.67

10,100 

10,000 

9,910 

10,000 

10,400 

10,600

June 1

Gage 

height

M;

10.61 

10.56 

10.39 

10.41 

10.68 

10.84

Discharge

iy2l

8,420 

8,330 

8,030 

8,070 

8,540 

8,850

May 27

11.52 

11.45 

11.43 

11.46 

11.66 

11.73

10,300 

10, -100 

10,100 

10,100 

10,600 

10,800

June 2

Gage 

height

M

11.09 

11.37 

11.60 

11.78 

11.70 

11.61

Discharge

iy22

9,340 

9,930 

10,500 

10,900 

10,700 

10,500

May 28

11.77 

11.70 

11.54 

11.50 

11.59 

11.80

10,800 

10,700 

10,300 

10,200 

10,500 

"10,900

June3

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

8 

4:30

8 

4:30

8 

4:30

8 

4:30

8 

4:30

Gage 

height

June 

10.40 

10.30

June 

10.40 

10.20

June 

10.70 

10.70

June 

10.20 

9.80

June 

9.50 

9.40

Discharge

1 

8,050 

7,880

2 

8,050 

7,720

3 

8,580 

8,580

4 

7,720 

7,120

5 

6,710 

6,580

Hour

8 

4:30

8 

4:30

8 

4:30

8 

4:30

8 

4:30

8 

4:30

Gage 

height Discharge

June 6 

9.40 6,580 

9.20 6,320

June 7 

9.40 6,580 

9.20 6,320

June 8 

9.40 6,580 

9.20 6,320

June 9 

9.10 6,190 

8.80 5,800

June 10 

8.80 5,800 

8.50 5,410

June 11 

8.50 5,410 

8.50 5,410

Hour

8 

4:30

8 

4:30

.8 

4:30

8 

4:30

8 

4:30

Gage 

height Discharge

June 12 

8.20 5,020 

8.00 4,760

June 13 

8.20 5,020 

8.00 4,760

June 14 

7.80 4,500 

7.50 4,110

June 15 

7.40 3,980 

7.20 3,720

June 16 

7.30 3,850 

7.30 3,850

Hour

8 

4:30

8 

4:30

8 

4:30

8 

4:30

8 

4:30

Gage 

height Discharge

June 17 

7.20 3,720 

7.00 3,460

June 18 

6.90 3,330 

6.76 3,150

June 19 

6.86 3,280 

6.76 3,150

June 20 

6.64 3,010 

6.60 2,960

June 21 

7.56 4,190 

8.20 5,020
238 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

North Pork Clear-water River at Bungalow ranger station, Idaho

Location.- Lat. 46°38', long. 115°30', In sec. 18, T. 38 N., R. 8 E., at Bungalow

ranger station, 300 feet downstream from mouth of Orogrande Creek, 1,000 feet downstream from steel highway bridge, and 17 miles northeast of Pierce.

Drainage area.- 996 square miles.

Gage-hilght record.- Water-stage recorder graph except June 7 to 9 a.m. June 13, when 

there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements to 

20,000 second-feet and extended to peak stage on basis of velocity-area study. Discharge for period June 7-13 computed on basis of records for station near Ahsahka.

Maxima.- May-June 1948: Discharge, 27,400 second-feet 1:30 a.m. May 29 (gage height,

 IT7T3 feet).

1944 to April 1948: Discharge, 19,700 second-feet May 8, 1947 (gage height, 

9.17 feet).

Remarks.- No diversion or regulation above station. Water-stage recorder Inspected by 

U. S. Forest Service ranger at Bungalow ranger station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

7,520

6,800

6,770

7,550

6,960

7,980

10,200

9,940

9,020

8,410

June

17,800

17,600

17,900

16,500

14,900

14,200

14,000

13,800

13,000

12,800

July

3,530

3,340

3,140

2,990

2,880

2,740

2,630

2,530

2,410

2,280

Day

11

12

13

14

15

16

17

18

19

20

May

8,240

8,470

10,200

10,300

9,760

10,300

12,500

13,800

14,100

17,400

June

12,400

11,000

9,800

9,020

8,110

7,850

7,250

6,580

6,210

6,020

July

2,240

2,110

1,990

1,920

1,870

1,820

1,750

1,710

1,990

2,220

Day^

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet.

Runoff, in inches ............................................................................................................................

May

19,000

19,900

17,600

17,800

19,100

20,600

22,900

24,600

25,200

20,300

18,700

15.75

June

6,300

5,840

5,360

5,010

4,870

4,700

4,500

4,150

3,900

3,700

9

crvp

10.64

July

1,890

1,680

1,550

1,480

1,430

1,400

1,460

2,490

2,670

1,820

1,580

2,179

2.52

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

i

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

7.14 

7.08 

7.05 

7.16 

7.57 

7.75

12,200 

ll,900 

11,800 

12,200 

13,700 

14,400

May 23

8.68 

8.53 

8.50 

8.58 

8.73 

8.76

M:

11.01 

10.95 

10.64 

10.22 

10.14 

9.92

18,800 

17,200 

17,100 

17,400 

18,000 

18,100

iy29

26,900 

26,700 

25,500 

23,800 

23,500 

22,600

June 4

8.24

8.22 

8.17

16,200

16,100 

15,900

June 10

June 16

*5.90 *7,850

Gage 

height Discharge

May 18

7.69 

7.61 

7.53 

7.50 

7.55 

7.59

14,200 

13,800 

13,600 

13,500 

13,600 

13,800

May 24

8.63 

8.46 

8.32 

8.50 

9.08 

9.23

M

9.55 

9.23 

9.03 

9.07 

9.45 

9.49

17,600 

17,000 

16,500 

17,100 

19,300 

19,900

iy30

21,100 

19,900 

19,100 

19,300 

20,800 

20,900

June 5

7.80 

7.78 

7.88 

7.89

Ju

14,500 

14,400 

14,800 

14,900

ne 11

June 17

*5.72 *7,250

Gage 

Jieight Discharge

May 19

7.53 

7.45 

7.40 

7.55 

8.15 

8.50

13,600 

13,300 

13,100 

13,600 

15,800 

17,100

May 25

8.97 

8.76 

8.64 

8.86 

9.50 

9.68

Mi

9.13 

8.85 

8.64 

8.68 

8.95 

9.04

Ju

7.62 

7.52 

7.62 

7.88 

7.89

18,900 

18,100 

17,700 

18,500 

20,900 

21,600

iy31

19,500 

18,400 

17,700 

17,800 

18,800 

19,200

ne6

13,900 

13,600 

13,900 

14,800 

14,900

June 12

June 18

*5.51 *6,580

Gage 

height Discharge

May 20

8.48 

8.40 

8.32 

8.51 

8.96 

9.01

17,000 

16,800 

16,500 

17,100 

18,800 

19,000

May 26

9.38 

9.12 

8.95 

9.22 

9.94 

10.03

Ju

8.81 

8.58 

8.41 

8.48 

8.85 

8.90

Ju

20,500 

19,500 

18,800 

19,900 

22,700 

23,000

ne 1

18,300 

17,400 

16,800 

17,000 

18,400 

18,600

ne 7

June 13

June 19

*5.39 *6,210

Gage 

height

M:

8.84 

8.70 

8.64 

8.92 

9.53 

9.75

Discharge

iy21

18,400 

17,900 

17,700 

18,700 

21,000 

21,900

May 27

9.81 

9.57 

9.47 

9.85 

10.75 

11.02

22,100 

21,200 

20,800 

22,300 

25,900 

27,000

June 2

8.68 

8.48 

8.36 

8.52 

8.89 

8.91

Ju

17,800 

17,000 

16,600 

17,200 

18,600 

18,600

ne8

June 14

*6.25 *9,020

June 20

*5.33 *6,020

Gage 

height

M

9.30 

9.05 

8.86

Discharge

iy22

20,200 

19,200 

18,500

May 28

10.67 

10.34 

10.08 

10.06 

10.41 

10.98

25,600 

24,300 

23,200 

23,100 

24,500 

26,800

June 3

8.73 

8.64 

8.66 

8.68 

8.76 

8.65

Jl

18,000 

17,700 

17,700 

17,800 

18,100 

17,700

ne9

June 15

*5.98 *8,110

June 21

*5.42 *6,300

* Mean for the day.
CLEARWATER RIVER BASIN 239

North Pork Clearwater River near Ahsahka, Idaho

Location.- Lat. 46°31', long. 116°18', in SE£ sec. 26, T. 37 N., R. IE., at Bruce's

Eddy, ij miles northeast of Ahsahka and 2 miles upstream from mouth. 

Drainage area.- 2,440 square miles. 

Gage-height record.- Water-stage recorder graph.

Discharge record.-^Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 55,600 second-feet noon May 29 (gage height, 25.79

1926 to April 1948: Discharge, 100,000 second-feet Dec. 23, 1933 (gage height, 

35.5 feet, from floodmarks), from rating curve extended above 41,000 second-feet by 

logarithmic plotting. 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

15,500

13,800

13,000

15,200

14,200

15,100

21,100

23,200

21,700

20,000

June

36,200

35,200

35,800

34,600

30,300

27,900

27,600

27,000

25,600

25,100

July

6,830

6,490

6,020

5,750

5,490

5,230

5,020

4,860

4,600

4,390

Day

11

12

13

14

15

16

17

18

19

20

May

18,700

18,300

21,600

22/500

19,800

20,800

24,100

27,700

27,100

33,800

June

24,400

21,700

19,100

18,000

15,800

15,000

14,000

12,600

12,000

11,200

July

4,270

4,130

3,930

3,750

3,640

3,570

3,430

3,320

3,570

4,780

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet. .............

Runoff, in inches ............................................................................................................................

May

37,400

43,200

40,700

39,400

41,000

42,800

45,300

49,500

52,000

43,200

39,500

28,430

13.43

June

11,600

11,300

10,300

9,540

9,100

8,840

8,670

7,960

7,500

7,220

18,700

8.55

July

4,360

3,570

3,240

3,110

2,960

2,840

2,840

5,460

8,100

5,120

4,040

4,475

2.11

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

15.95 

16.43 

16.78 

16.57 

16.44 

16.78

22,900 

24,200 

25,100 

24,500 

24,200 

25,100

May 23

22.06 

21.70 

21.51 

21.62 

21.71 

21.70

Ms

24.19 

25.15 

25.79 

25.46 

24.85 

24.04

Ju

20.51 

20.34 

20.01 

19.65 

19.29 

19.16

41,600 

40,400 

39,700 

40,100 

40,400 

40,400

iy29

49,400 

 53,000 

55,600 

54,200 

51,900 

48,800

ne4

36,400 

35,800 

34,800 

33,600 

32,500 

32,100

June 10

16.98 

17.25 

17.15 

16.61 

16.16 

16.31

25,700 

26,400 

26,200 

24,600 

23,400 

23,800

June 16

12.80 

12.89 

12.77 

12.63 

12.56 

12.45

15,200 

15,400 

15,200 

14,900 

14,700 

14,500

Gage 

height Discharge

May 18

17.38 

18.04 

18.07 

17.82 

17.60 

17.49

26 , 800 

28,700 

28,800 

28,100 

27,400 

27,100

May 24

21.77 

21.74 

21.47 

21.06 

20.92 

21.43

40,600 

40,500 

39,600 

38,200 

37,700 

39,400

May 30

23.53 

23.05 

22.44 

21.79 

21.40 

21.54

Ju

19.08 

18.89 

18.60 

18.28 

17.99 

17.97

46,900 

45,100 

42,900 

40,700 

39,300 

39,800

ne5

31,800 

31,300 

30,400 

29,400 

28,600 

28,500

June 11

16.43 

16.82 

16.68 

16.38 

16.54 

16.48

24,200 

25,200 

24,800 

24,000 

24,400 

24,300

June 17

12.36 

12.42 

12.24 

12.08 

11.89 

11.75

14,300 

14,400 

14,100 

13,800 

13,400 

13,100

Gage 

height Discharge

May 19

17.47 

17.51 

17.47 

17.26 

17.38 

18.12

27,100 

27,200 

27,100 

26,500 

26,800 

29,000

May 25

22.01 

22.36 

22.14 

21.57 

21.44 

21.96

41,400 

42,700 

41,900 

39,900 

39,500 

41,300

May 31

22.09 

22.16 

21.66 

20.94 

20.60 

20.66

Ju

18.07 

18.05 

17.80 

17.45 

17.31 

17.64

41,700 

42,000 

40,200 

37,800 

36,700 

36,900

ne 6

28,800 

28,800 

28,000 

27,000 

26,600 

27,600

June 12

16.12 

15.81 

15.60 

15.15 

14.77 

14.65

23,300 

22,500 

21,900 

20,800 

19,800 

19,500

June 18

11.71 

11.61 

11.54 

11.36 

11.26 

11.26

13,000 

12,800 

12,700 

12,400 

12,200 

12,200

Gage 

height Discharge

May 20

19.20 

19.95 

20.09 

19.87 

19.86 

20.37

32,200 

34,600 

35,000 

34,300 

34,300 

35,900

May 26

22.52 

22.92 

22.63 

22.12 

21.97 

22.53

43,200 

44,700 

43,600 

41,800 

41,300 

43,300

June 1

20.84 

20.89 

20.68 

20.14 

19.87 

20.08

Jl

17.93 

18.04 

17.78 

17.39 

17.23 

17.56

37,500 

37,600 

36,900 

35,200 

34,300 

35,000

ne 7

28,400 

28,700 

28,000 

26,800 

26,400 

27,300

June 13

14.53 

14.41 

14.34 

14.36 

14.57 

14.61

19,200 

18,900 

18,700 

18,800 

19,300 

19,400

June 19

11.25 

11.23 

11.24 

11.19 

10.98 

10.88

12,200 

12,100 

12,100 

12,000 

11,700 

11,500

Gage 

height Discharge

May 21

20.96 

21.22 

20.98 

20.63 

20.53 

20.98

37,900 

38,700 

37,900 

36,800 

36,400 

37,900

May 27

23.12 

23.51 

23.30 

22.83 

22.78 

23.49

45,400 

46,800 

46,000 

44,300 

44,200 

46,700

June 2

20.43 

20.59 

20.31 

19.82 

19.65 

19.97

36,100 

36,600 

35,700 

34,200 

33,600 

34,700

June 8

17.80 

17.87 

17.54 

17.13 

16.95 

17.16

Ju

14.47 

14.31 

14.13 

13.76 

13.49 

13.41 J

28,000 

28,200 

27,300 

26,100 

25,600 

26,200

ne 14

19,100 

18,700 

18,200 

17,400 

16,800 

16,600

June 20

10.81 

10.74 

10.74 

10.73 

10.62 

10.59

11,300 

11,200 

11,200 

11,200 

11,000 

11,000

Gage 

height Discharge

May 22

21.76 

22.32 

22.88 

23.19 

22.96 

22.54

40,600 

42,500 

44,500 

45,600 

44,800 

43,300

May 28

24.40 

24.98 

24.69 

24.02 

25.65 

23.61

50,200 

52,400 

51,300 

48,700 

47,300 

47,200

June 3

20.39 

20.59 

20.35 

20.17 

20.28 

20.52

Jl

17.31 

17.36 

17.04 

16.62 

16.45 

16.63

36,000 

36,600 

35,800 

35,300 

35,600 

36,400

ne9

26,600 

26,700 

25,800 

24,700 

24,200 

24,700

June 15

13.34 

13.22 

13.12 

12.89 

12.69 

12.71

16,400 

16,200 

15,900 

15,400 

15,000 

15,100

June 21

10.67 

10.86 

11.10 

11.14 

11.14 

11.11

11,100 

11,400 

11,900 

11,900 

11,900 

11,900
240 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Potlatch Creek at Kendrick, Idaho

Location.- Lat. 46°37', long. 116°39', in NW£ sec. 25, T. 38 N., R. 3 W., at Mill 

Street Bridge in Kendriek, 0.9 mile downstream from Bear Creek and 3.2 miles upstream from Middle Potlatch Creek.

Drainage area.- 460 square miles.

Gage-height record.- Wire-weight gage read once daily.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge observed, 7,820 second-feet 2:10 p.m. May 22 (gage 

height, 10.53 feet).

1945 to April 1948: Discharge, 13,000 second-feet Feb. 26, 1948 (gage height, 

12.6 feet, from floodmark), by slope-area method.

Remarks.- No diversion or regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

759

673

594

660

679

617

773

2,880

5,280

3,720

June

867

660

617

654

480

444

379

323

288

250

July

156

125

116

101

107

101

99

87

87

83

Day

11

12

13

14

15

16

17

18

19

20

May

2,650

2,410

2,460

1,950

1,370

1,030

959

874

801

2,940

June

269

588

340

323

265

435

397

288

402

425

July

76

89

64

60

56

53

52

45

60

167

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . . ............ ..................................

Runoff, in inches ............................................................................................................................

May

1,760

3,800

4,490

4,080

1,780

1,330

992

837

1,920

1,430

1,110

1,858

4.66

June

411

464

388

296

262

229

203

190

150

156

381

0.93

July

158

83

65

65

58

53

52

93

444

307

197

108

0.27

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

Hour

6a

6a

5:30a

5:55a

6:05a

6

2:10

5:30

5:45p

6:15p

3:10p

Gage 

height Discharge

May 17

6.99 959

May 18

6.88 874

May 19

6.78 801

May 20

8.41 2,940

May 21

7.71

Maj

7.31

10.53

10.08

1,760

T 22

1,250

7,820

6,700

May 23

9.17

Maj

8.98

4,490

T 24

4,080

May 25

7.73 1,780

Hour

7:30p

lOa

10:25a

5:30

4:20

6:50

8:05a

7:30a

8:25a

l:25p

3:15p

Gage 

height

May

7.38

May

7.03

May

6.83

May

7.79

7.84

7.85

May

7.47

May

7.17

Discharge

26

1,330

27

992

28

837

29

1,880

1,950

1,970

30

1,430

31

1,110

June 1

6.87

Jun

6.57

867

s 2

660

June 3

6.50 617

Hour

Noon

8:10p

10:20a

5:45

3:30

6:053

6:20p

9:10a

l:25p

9:50a

8:15a

Gage 

height Discharge

June 4

6.56 654

June 5

6.25 480

June 6

6.18 444

June 7

6.07

6.01

392

366

June 8

5.93

5.89

332

315

June 9

5.82 288

June 10

5.72

Jui

5.77

250

ne 11

269

June 12

6.45 588

Hour

9:35a

4:40a

N

7:10a

8:35a

9:05a

8:05a

4p

9:00a

Gg- (Discharge

June 13

5.95 340

June 14

5.91 323

June 15

5.76 265

June 16

6.16 435

June 17

6.08 397

June 18

5.82 288

June 19

6.09 402

June 20

6.14 425

June 21

6.11 411
FLOODS OF MAY-JUNE 1948 IS COLUMBIA RIVER BASIN 241

Walla Walla River Baaln 

South Fork Walla Walla River near Milton, Oreg.

Location.- Lat. 45°40', long. 118°10', In NE£ sec. 15, T. 4 N., R. 37 E., 1 mile upstream from Pacific Power & Light Co.'s penstock intake and 13 miles southeast of 

Milton. Altitude of gage, about 2,050 feet (from river-profile map).

Drainage area.- 63 square miles.

Gage-Height record.- Water-stage recorder graph except for periods 11 a.m. May 30 to 

11 a.m. June 1, 10 p.m. June 4 to 1 p.m. June 15, when there was no gage-height 

record. ^

Discharge record.- Stage-discharge relation defined by current-meter measurements

below 680 second-feet and extended to peak stage. Discharge for periods of no gageheight record computed on basis of records for North Fork Walla Walla River near 

Milton.

Maxima.- May-June 1948: Discharge, 1,180 second-feet 4 p.m. May 22 (gage height, 3.20

1906-17, 1931 to April 1948: Discharge, 2,430 second-feet Dec. 12, 1946 (gage 

height, 4.20 feet).

Maximum stage known, about 6 feet Mar. 31, 1931, present site and datum. 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

268

261

315

420

355

370

409

498

706

528

June

500

568

552

494

470

460

485

510

510

490

July

205

196

189

183

189

175

186

170

165

160

Day

11

12

13

14

15

16

17

18

19

20

May

498

450

634

534

492

528

542

490

569

625

June

460

420

380

350

310

330

309

295

236

302

July

162

157

153

153

151

151

149

149

146

146

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .. ... .. .... ...... , ...... . .

Runoff,jn inches .................................................................... .......................................................

May

665

996

909

805

738

788

863

788

600

518

480

569

10.41

June

480

429

370

322

290

266

243

232

226

218

386

6.83

July

144

142

140

138

138

136

142

178

149

142

140

159

2.91

Gage height, in feet, and discharge, in second-feet, at indicated time, 191&

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.53 

2.51 

2.50 

2.49 

2.47 

2.46

561 

547 

540 

534 

532 

516

May 23

3.02 

2.97 

2.91 

3.00 

3.09 

3.03

JAl

2.70 

2.67 

2.64 

2.63 

2.63 

2.60

Ju

2.52 

2.51 

2.48

920 

870 

810 

900 

990 

930

iy29

630 

609 

588 

581 

581 

560

ne 4

512 

506 

488

June 10

Ju

2.20 

2.18 

2.18 

2.19 

2.18 

2.17

nel6

335 

326 

326 

330 

326 

322

Gage 

height Discharge

May 18

2.44 

2.42 

2.41 

2.38 

2.39 

2.46

504 

492 

486 

468 

474 

516

May 24

2.92 

2.84 

2.78 

2.89 

3.03 

2.86

M

2.57 

2.54

Ju

820 

746 

694 

791 

930 

764

iy30

542 

524

ne 5

June 11

Ju

2.16 

2.15 

2.14 

2.13 

2.13 

2.12

nel?

317 

312 

508 

304 

304 

299

Gage 

height Discharge

May 19

2.49 

2.52 

2.53 

2.56 

2.61 

2.61

534 

554 

561 

582 

618 

618

May 26

2.79 

2.75 

2.75 

2.87 

2.94 

2.88

Ms

Ju

702 

670 

670 

773 

840 

782

iy31

ne6

June 12

June 18

2.11 

2.10 

2.09 

2.09 

2.13 

2.18

294 

290 

286 

286 

304 

326

Gage 

height Discharge

May 20

2.59 

2.57 

2.53 

2.61 

2.72 

2.75

603 

589 

561 

618 

706 

730

May 26

2.85 

2.79 

2.74 

2.90 

3.07 

3.00

755 

702 

662 

800 

970 

900

June 1

2.54 

2.62 

2.66 

2.63

Ju

524 

574 

602 

581

ne7

June 13

June 19

2.14 

2.11 

2.10 

2.09 

2.10 

2.10

3O8 

294 

290 

286 

290 

290

Gage 

height Discharge

May 21

2.70 

2.65 

2.61 

2.62 

2.67 

2.77

690 

650 

618 

626 

666 

746

May 27

2.93 

2.88 

2.88 

2.94 

3.05 

3.10

830 

782 

782 

840 

950 

1,000

June 2

2.59 

2.56 

2.54 

2.63 

2.69 

2.66

Ju

554 

536 

524 

581 

623 

602

ne8

June 14

Jui

2.09 

2.08 

2.08 

2.16 

2.20 

2.18

ne20

286 

282 

282 

317 

335 

326

Gage 

height Discharge

May 22

2.87 

3.00 

3.19 

3.20 

3.08 

3.04

833 

960 

1,170 

1,180 

1,050 

1,000

May 28

3.01 

2.92 

2.86 

2.80 

2.78 

2.74

Ju

2.62 

2.59 

2.57 

2.57 

2.56 

2.54

Jl

910 

820 

764 

710 

694 

662

ne3

574 

554 

542 

542 

536 

524

ne9

June 15

2.16 

2.24 

2.24

317 

355 

355

June 21

2.32 

2.61 

2.56 

2.50 

2.47 

2.45

396 

567 

536 

500 

482 

470

Supplemental record.- May 22, 2 p.m., 315 ft., 1,120 sec.-ft., 5 p.m., 3.02 ft., 982 

sec.-ft., 10 p.m., 3.10 ft., 1,070 sec.-ft.j May 27, 10 p.m., 315 ft., 1,060 sec.-ft.
242 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

North Pork Walla Walla River near Milton, Oreg.

Location. - Lat. 45°54', long. 118°18', In NW^HEi sec. 22, T. 5 N. , R. 36 E. at bridge 

half a mile upstream from confluence with South Pork and 4.5 miles southeast of 

Milton. Datum of gage Is 1,405.69 feet above mean sea level, datum of 1929.

Drainage area.- 47 square miles.

gage-height record.- Water-stage recorder graph.

Discharge reeord^-~Stage-dlseharge relation defined by current -meter measurements below 

330 second-feet and extended to peak stage. Shifting-control method used May 1-21.

Maxima.- May-June 1948: Discharge, 570 second-feet 5 p.m. May 22 (gage height, 5.92

1929 to April 1948: Discharge, 1,980 second-feet Dec. 12, 1946 (gage height, 

6.97 feet). 

Remarks . - Diversions above station for irrigation of about 220 acres; no regulation.

Mean discharge, in second-feet, 1948.

Day

1

2

3

4

5

6

7

8

9

10

May

100

94

100

127

140

140

170

252

267

165

June

272

276

274

244

218

214

225

229

219

196

My

54

47

42

39

44

42

47

40

38

36

Day

11

12

13

14

15

16

17

18

19

20

May

148

185

300

254

200

221

199

167

184

168

June

170

148

142

128

122

126

108

100

100

102

July

36

34

28

22

18

19

16

16

13

15

Day

21

22

28

24

25

26

27

28

39

30

31

Monthly mean discharge, in second-feet ......... . ........................................... _ .....

Runoff, in inches ............................................................................................................................

May

231

470

431

416

337

338

366

500

428

328

288

249

6.10

June

298

268

209

160

130

111

95

77

64

61

170

4.02

July

15

15

15

15

15

14

14

47

38

23

18

28.2

0.69

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

4.80 

4.79 

4.80 

4.80 

4.79 

4.76

200 

197 

200 

200 

197 

188

May 23

5.52 

5.47 

5.57 

5.75 

5.70 

5.75

M

5.64 

5.57 

5.46

389 

368 

412 

492 

470 

492

iy29

443 

412 

364

June 4

5.15 

5.12 

5.10

248 

237 

230

June 10

5.01 

4.96 

4.94

Ju

4.72 

4.71 

4.68

203 

188 

182

ne 16

125 

122 

115

Gage 

height Discharge

May 18

4.76 

4.76 

4.72 

4.69 

4.67 

4.83

173 

173 

162 

155 

150 

194

May 24

5.68 

5.58 

5.51 

5.59 

5.51 

5.46

M

5.37 

5.34 

5.34

Ju

5.06 

5.04 

5.05

Ju

4.91 

4.88 

4.86

461 

416 

384 

420 

384 

364

iy 30

328 

316 

316

ne5

218 

212 

215

nell

173 

165 

160

June 17

4.66 

4.63 

, 4.62

Supplemental record. -

f t . , 394 sec . -ft . ; May

111 

104 

102

Gage

height Discharge

May 19

4.77 

4.81 

4.80 

4.79 

4.81 

4.77

M:

5.41 

5.39 

5.36 

5.37 

5.40 

5.40

M.

5.26 

5.24 

5.24

176 

188 

185 

182 

188 

176

iy25

344 

336 

324 

328 

340 

340

iy31

286 

279 

279

June 6

5.04 

5.04 

5.08

212 

212 

224

June 12

4.83 

4.78 

4.80

152 

140 

145

June 18

4.61 

4.59 

4.66

99 

95 

111

Gage 

height Discharge

May 20

4.67 

4.69 

4.73 

4.77 

4.80 

4.79

150 

155 

165 

176 

185 

182

May 26

5.36 

5.35 

5.39 

5.45 

5.43 

5.39

324 

320 

336 

360 

352 

336

June 1

5.21 

5.21 

5.24

268 

268 

279

June?

5.07 

5.08 

5.11

221 

224 

234

June 13

4.79 

4.79 

4.77

142 

142 

138

June 19

4.63 

4.59 

4.58

104 

95 

93

Ggj- | Discharge

May 21

4.83 

4.86 

4.90 

5.02 

5.21 

5.38

Ms

5.39 

5.45 

5.40 

5.38 

5.55 

5.70

Ju

5.21 

5.23 

5.27

Ju

5.10 

5.07 

5.13

Ju

4.75 

4.72 

4.71

179 

188 

200 

237 

304 

372

y27

336 

360 

340 

332 

402 

470

ne2

268 

276 

290

ne8

230 

221 

240

ne!4

132 

122 

122

June 20

4.57 

4.64 

4.72

91 

106 

125

Gage 

height

M.

5.57 

5.79 

5.71 

5.87 

5.67 

5.59

Discharge

iy22

412 

510 

474 

546 

456 

420

May 28

5.82 

5.78 

5.75 

5.75 

5.75 

5.75

Ju

5.23 

5.21 

5.20

Jl

5.06 

5.04 

5.05

524 

506 

492 

492 

492 

492

me 3

276 

268 

265

ne9

218 

212 

215

June 15

4.71 

4.69 

4.67 

4.66 

4.75 

4.82

Ju

5.00 

5.51 

5.42 

5.37 

5.33 

5.31

122 

118 

113 

111 

132 

150

ne21

200

384 

348 

328 

312 

304

May 22, 5 p.m., 5.92 ft., 570 sec. -ft. ; May 27, 6 a.m., 5.53 

28, 6 a.m., 5.87 ft., 546 sec. -ft.
WALLA WALLA RIVER BASIN 243

Mill Creek near Walla Walla, Wash.

Location.- Lat. 46°00', long. IIS^O?', In SEiSEj sec. 12, T. 6 N., R. 37 E., 4 miles 

downstream from city of Walla Walla diversion dam, 4j miles upstream from Blue Creek, 

and llj miles southeast of Walla Walla. Datum of gage Is 2,000 feet above mean sea 

level, unadjusted.

Drainage area.- 54 square miles.

Gage-height record.- Water-stage recorder graph except June 28 to July 2, July 8-10.

Discharge record.-"Stage-discharge relation defined by current_-meter measurements. Gage 

heights used to hundredths. Shifting-control method used May 1 to July 31. Discharges for periods of no gage-height record computed on basis of records for nearby 

streams.

Maxima- - May-June 1948: Discharge, 873 second-feet 5 a.m. May 9 (gage height, 16.34

1913-17, 1938, 1939 to April 1948: Discharge, 1,880 second-feet Dec. 28, 1945 

(gage height, 17.85 feet).

Remarks.- City of Walla Walla diverts about 22 second-feet 4 miles above gage for municlpal use.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

204

187

200

238

233

248

293

487

684

377

June

193

194

193

163

146

146

147

154

145

134

July

70

67

67

64

69

64

65

62

58

53

Day

11

12

13

14

15

16

17

18

19

20

May

323

287

437

359

299

293

281

229

298

356

June

125

112

112

103

104

101

93

90

89

90

July

49

48

48

48

49

49

49

47

47

47

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches............................................................................................................................

May

369

466

464

397

400

394

388

343

254

212

204

329

7.03

June

132

115

106

97

90

86

80

78

75

72

119

2.46

July

44

44

45

44

44

42

48

70

67

60

42

53.9

1.15

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

15.58 

15.58 

15.55 

15.53 

15.51 

15.49

299 

299 

281 

270 

259 

248

May 23

15.86 

15.85 

15.8? 

15.81 

15.81 

15.74

Ms

15.49 

15.46 

15.43 

15.41 

15.40 

15.40

485 

479 

461 

455 

455 

413

iy29

281 

264 

248 

238 

233 

233

June 4

15.24 

15.22 

15.20 

15.19 

15.19 

15.17

174 

168 

160 

157 

157 

150

June 10

15.11 

15.10 

15.08 

15.07 

15.07 

15.07

140 

137 

132 

129 

129 

129

Jnne 16

14.95 

14.94 

14.93 

14.93 

14.93 

14.92

104 

101 

99 

99 

99 

97

Gage 

height Discharge

May 18 .

15.48 

15.46 

15.44 

15.43 

15.42 

15.48

243 

233 

222 

218 

213 

243

May 24

15.72 

15.72 

15.69 

15.69 

15.72 

15.74

401 

401 

383 

383 

401 

413

May 30

15.38 

15.36 

15.34 

15.33 

15.36 

15.36

Ju

15.17 

15.16 

15.15 

15.15 

15.16 

15.16

222 

213 

204 

200 

213 

213

ne5

150 

146 

143 

143 

146 

146

June 11

15.07 

15.07 

15.06 

15.05 

15.04 

15.03

129 

129 

126 

123 

121 

118

June 17

14.91 

14.91 

14.90 

14,. 90 

14.89 

14.89

94 

94 

92 

92 

90 

90

Gage 

height Discharge

May 19

15.53 

15.56 

15.56 

15.58 

15.62 

15.67

275 

293 

293 

305 

329 

359

May 25

15.72 

15.71 

15.67 

15.69 

15.72 

15.74

M:

15_~35 

15.33 

15.31 

15.31 

15.33 

15.33

Ji

15.16 

15.16 

15.11 

15,14 

15.16 

15.16

407 

. 401 

377 

389 

407 

419

»y31

213 

204 

196 

196 

204 

204

ne6

150 

150 

135 

143 

150 

150

June 12

15.01 

15.01 

15.00 

14.97 

14.98 

15.01

115 

115 

113 

106 

108 

115

June 18

14.89 

14.89 

14.88 

14.88 

14.89 

14.92

90 

90 

88 

88 

90 

97

Gage 

height Discharge

May 20

15.67 

15.65 

15.64 

15.66 

15.69 

15.70

359 

347 

341 

353 

371 

377

May 26

15.72 

15.68 

15.66 

15.68 

15.72 

15.72

Ju

15.32 

15.30 

15.29 

15.30 

15.30 

15.31

Ju

15.16 

15.15 

15.14 

15.14 

15.16 

15.16

407 

383 

371 

383 

407 

407

ne 1

200 

191 

187 

191 

191 

196

ne7

150 

146 

143 

143 

150 

150

June 13

15.02 

15.00 

15.00 

14.98 

14.98 

14.98

118 

113 

113 

108 

108 

108

June 19

14.90 

14.88 

14.88 

14.87 

14.87 

14.87

92 

88 

88 

86 

86 

86

Gage 

height Discharge

May 21

15.68 

15.67 

15.65 

15.66 

15.65 

15.74

371 

365 

347 

359 

353 

407

May 27

15.68 

15.66 

IB. 65 

15.65 

15.72 

15.70

389 

377 

371 

371 

413 

401

June 2

15.29 

15.29 

15.28 

15.29 

15.32 

15.33

191 

191 

187 

191 

204 

209

June 8

15.16 

15.15 

15.13 

15.13 

15.20 

15.17

Ju

14.96 

14.95 

14.95 

14.94 

14.94 

14.94

154 

150 

143 

143 

168 

157

ne 14

106 

104 

104 

101 

101 

101

June 20

14.87 

14.87 

14.87 

14.91 

14.93 

14.92

86 

86 

86 

94 

99 

97

Gage 

height Discharge

May 22

15.75 

15.87 

15.85 

15.88 

15.88 

15.87

Ma

15.66 

15.63 

15.60 

15.57 

15.55 

15.52

413 

485 

473 

491 

491 

485

y28

377 

359 

341 

323 

311 

293

June 3

15.32 

15.30 

15.29 

15.29 

15.27 

15.25

Ju

15.15 

15.13 

15.13 

15.13 

15.13 

15.13

204 

196 

191 

191 

182 17*4

ne9

150 

143 

143 

143 

143 

143

June 15

14.94 

14.95 

14.94 

14.93 

14.97 

14.99

101 

104 

101 

99 

108 

113

June 21

15.05 

15.12 

15.08 

15.07 

15.05 

15.03

129 

150 

137 

135 

129 

123

Supplemental record.- May 19, 2 a.m., 15.48 ft., 248 sec.-ft.} June 8, 6 p.m., 15.23 

ft., 178 sec.-ft.; June 15, 6 p.m., 14.92 ft., 97 sec.-ft., ]"

sec.-ft.; May 21, 10 p.m., 15.78 ft., 431 sec.-ft.

10 p.m., 15.03 ft., 123
244 FLOODS OF MAY-JUNE 1948 IK COLUMBIA RIVER BASIN

Mill Creek at Walla Walla, Wash.

Location.- Lat. 46°04'40", long. 118°17'00", In NE£ sec. 22, T. 7 N., R. 36 E., at 

bridge, 0.9 mile downstream from diversion dam and 1.0 mile east of Walla Walla.

Drainage area.- 90 square miles.

Gage-height "record.- Water-stage recorder graph except for period June 19 to July 

19, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements 

below 900 second-feet and extended to peak stage on basis of slope-area measurement. Gage heights used to hundredths. Shifting-control method used May 1 to 

July 31. Discharge for period of no gage-height record computed on basis of 

records for other stations in basin.

Maxima.- May-June 1948: Discharge, 978 second-feet 7 a.m. May 9 (gage height, 2.72

1941 to April 1948: Discharge, 2,760 second-feet Dec. 28, 1945 (gage height, 

4.0 feet).

Remarks.- Some regulation at diversion dam, 0.9 mile above station where water Is 

diverted into Yellowhawk and Garrison Creeks for flood control and Irrigation. 

City of Walla Walla diverts water for municipal supply. Other small diversions 

above station for Irrigation. Records subject to revision.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

142

133

138

156

160

160

166

337

954

591

June

98

101

112

112

128

115

120

124

120

98

July

13

10

14

12

7

4

3

7

6

5

Day

11

12

13

14

15

16

17

18

19

m

May

440

353

558

420

310

271

243

204

278

302

June

74

63

63

72

58

55

38

20

10

25

July

5

4

4

3

2

4

3

4

3

2.8

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet..................................................................... _ ......

Runoff, in inches............................................................................................................................

May

302

514

430

310

257

215

210

160

104

98

98

3.72

June

75

60

45

35

27

20

14

23

19

16

64.7

0.80

July

3.9

3.9

3.9

.8

1.8

2.8

1.8

12

12

9.8

9.8

5.75

0.07

Blue Creek near Walla Walla, Wash.

Location.- Lat. 46°03'40", long. 118°07'50", In SE£NW$ sec. 25, T. 7 N., R. 37 E., 1 

mile upstream from mouth and 10 miles east of Walla Walla. Datum of gage is at 

mean sea level, unadjusted.

Drainage area.- 17.0 square miles.

Qage-helght record.- Water-stage recorder graph except periods June 3-16, June 18 to 

July 16. Discharge record.- Stage-discharge relation defined by current-meter measurements 

below 310 second-feet and extended to peak stage. Discharge for periods of no 

gage-height record computed on basis of records for nearby streams. Qage heights 

used to hundredths. Shifting-control method used May 11 to July 31.

Maxima.- May-June. 1948: Discharge, 415 second-feet 4 p.m. May 22 (elevation, 1,742.65 

Feet). 1939 to April 1948: Discharge, 725 second-feet Dec. 28, 1945 (elevation, 

1,743.35 feet).

Remarks.- No known diversion of regulation.

Mean discharge, in second-feet, 1948

Day

1

5

6

7

8

10

May

35

31

29

26

26

40

156

172

June

24

22

21

17

15

15

17

18

15

12

July

6

6

5

5

6

5

5

4

3

2

Monthly mean discharge, in second-f e< 

Runoff, in inches

Day

11

12

13

14

15

16

17

18

19

20

May

105

81

91

83

56

44

34

31

53

60

June

9

8

8

7

7

6

4.9

4

5

6

July

1

1

1

1

1

1

1.0

1.0

1.1

1.2

Day

21

22

28

24

25

26

27

28

29

30 

31

it

....................................................................................

May

67

266

218

146

95

72

57

46

37

32 

29

73.6 

4.99

June

9

26

22

16

13

11

12.3 

0.81

July

1.2

1.1

1.6

1.2

1.5

2.6

1.8

1.5 

1.4

2.38

0.16
WALLA WALLA RIVER BASIN 245

Yellowhawk Creek at Walla Walla, Wash.

Location.- Lat. 46°04'20", long. 118°16'55It , In NW|SWi sec. 23, Th 7 N., R. 36 E., 0.8 

mile downstream from diversion of Garrison Creek, 1 mile downstream from point of 

diversion from Mill Creek, and 1 mile east of Walla Walla.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

130 second-feet and extended to peak stage. Oage heights used to hundredths. Shifting-control method used July 22-30.

Maxima.- May-June 1948: May-June 1948: Discharge, 250 second-feet 2 a.m. May 9 (gage 

height, 2.31 feet).

1941 to April 1948: Discharge not determined, occurred June 7, 1941 (gage height, 

4.00 feet).

Remarks.- Yellowhawk Creek diverts water from Mill Creek which Is subject to regulation 

at flood-control dam on Mill Creek. Many small diversions above station for 

Irrigation.

Mean discharge, in secondDay

1

2

3

4

5

6

7

8

9

10

May

44

 38

43

52

53

58

69

121

210

123

June

79

86

92

81

72

72

105

112

125

110

July

62

61

58

57

69

64

64

58

54

51

Day

11

12

13

14

15

16

17

18

19

20

May

89

84

123

104

79

73

69

58

82

94

June

100

69

76

53

66

86

70

70

54

53

feet, 1948

July

56

53

51

48

47

46

46

44

48

50

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches............................................................................................................................

May

97

154

138

110

97

90

86

75

56

47

63

86.4

June

62

77

78

73

69

64

60

60

61

65

76.7

July

50

43

37

32

33

35

32

57

43

35

33

48.9

Garrison Creek at Walla Walla, Wash.

Location.- Lat. 46°04'25", long. 1180 17 ! 10", In NE-j- sec. 22, T. 7 N., R. 36 B., 30 feet 

downstream from county bridge. 0.8 mile downstream from Yellowhawk Creek diversion, 

and 0.9 mile east of Walla Walla.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Qage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 60 second-feet 2 a.m. May 9 (gage height, 3.28 ft.).

 1941 to April 1948: Discharge, 58 second-feet Feb. 26, 1948 (gage height, 3.25 

feet).

Remarks.- Regulation at Mill Creek flood-control dam, 0.8 mile upstream. Garrison

Creek diverts some flood water from Mill Creek and water for irrigation during irrigation seasons.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

11

9.1

10

12

12

13

15

30

50

29

June

16

18

19

15

12

13

21

16

1.3

.8

July

3.0

2.2

2.0

1.6

2.0

2.0

2.2

2.5

2.2

2.2

Day

11

12

13

14

15

16

17

18

19

20

May

22

20

32

26

20

17

16

12

19

22

June

0.5

.1

.1

4.1

12

16

14

14

9.5

8.2

July

2.5

2.2

2.0

1.9

1.9

1.4

1.6

2.0

.9

1.9

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..................................................................... _ .....

Runoff, in inches ...................................... ........................ ............................................................

May

22

36

32

25

22

20

18

16

11

9.1

12

20.0

-

June

9.1

12

12

10

9.5

7.9

7.5

5.0

4.4

3.2

9.71

-

July

2.2

2.7

2.2

1.6

1.4

1.3

1.4

2.7

2.5

2.2

2.2

2.02

-
FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

East Pork Touchet River near Dayton, Wash.

Location.- Lat. 46°16'45", long. 117°54'05". In NW^-HWi sec. 11, T. 9 N. , R. 39 E. , 250 

feet upstream from city of Dayton's water-supply headworks, 1,000 feet upstream from 

Hatley Creek, three-quarters of a mile downstream from Wolf Creek, 3 miles upstream 

from confluence with South Pork, and 4 miles southeast of Dayton. Datum of gage is 

1,768.3 feet above mean sea level (river-profile survey).

Drainage area. - 102 square miles.

Gage-height record.- Water-stage recorder graph except for July 23, 24, for which gage 

heights were interpolated.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

460 second-feet and extended to peak stage. Gage heights used to hundredths May 17 

to June 21; hundredths below and half-tenths above 3.7 feet May 1-16, June 22 to 

July 31. Shifting-control method used May 1-8.

Maxima. - May-June 1948: Discharge, 820 second-feet 1 a.m. May 13 (gage height, 4.06

1941 to April 1948: Discharge, 1,380 second-feet Feb. 26, 1948 (gage height, 5.05 

feet). 

Remarks . - Small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

77

58

64

48

36

38

41

104

283

459

June

334

314

302

288

270

250

235

225

216

208

July

84

82

81

82

84

84

81

77

73

73

Day

11

12

13

14

15

16

17

18

195>0

May

454

477

640

580

482

442

446

412

483

494

June

198

185

172

163

159

155

142

136

127

124

July

75

71

68

68

66

66

64

64

70

68

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .... .................. ..................................................

Runoff, in inches ............................................................................................................................

May

515

494

474

465

456

519

519

489

444

394

360

363

4.10

June

118

121

112

107

101

99

92

88

86

84

174

1.90

July

66

63

66

61

56

56

69

110

77

63

63

72.1

0.82

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.28 

3.28 

3.33 

3.29 

3.27 

3.25

442 

442 

464 

446 

438 

430

May 23

3.35 

3.34

M

3.29 

3.21

Ju

2.87

472 

468

iy29

446 

414

ne4

281

June 10

2.64 204

June 16

2.45 151

hefght | Discharge

May 18

3.23 

3.20 

3.18 

3.17 

3.17 

3.30

422 

410 

402 

398 

398 

450

May 24'

3.33 

3.33

M

3.11

Ju

2.81

464 

464

374

ne5

260

June 11

2.60 192

June 17

2.40 

2.40

138 

138

Gage 

height Discharge

May 19

3.57 

3.33 

3.30 

3.35 

3.36 

3.38

575 

464 

450 

472 

477 

486

May 25

3.30 

3.30

3.33

M

3.04

Ju

2.75

Ju

2.55

450 

450

464

iy31

346

ne6

240

ne!2

178

June 18

2.40

2.37 

2.40 

2.39

138

131 

138 

136

Gage 

height Discharge

May 20

3.38 

3.37 

3.35 

3.36 

3.49 

3.50

486 

482 

472 

477 

536 

540

May 26

3.51 

3.47 

3.40 

3^40 

3.47 

3.46

Ju

2.98

Ju

2.72

545 

526 

495 

495 

526 

522

ne 1

322

ne7

230

June 13

2.51 167

June 19

2.35 

2.33

2.35

126

121

126

Gage 

height

M

3.47 

3.45 

3.42 

3.43 

3.43 

3.42

Discharge

iy21

' 526 

518 

504 

508 

508 

504

May 27

3.44 

3.45 

3.38 

3.40 

3.50 

3.58

513 

518 

486 

495 

540 

580

June 2

2.94 307

June 8

2.69 220

June 14

2.48

Ju

2.33

159

ne20

121

Gage 

height

M!

3.40 

3.37

Discharge

iy22

495 

482

May 28

3.40 

3.38

3.34

495 

486

468

June 3

2.91

Ju

2.68 

2.66

296

ne9

217

211

June 15

2.48 159

June 21

2.30 114

Supplemental record.- May 17, 9 a.m., 3.33 ft., 464 sec.-ft.; May 18, 10 p.m., 3.25 

ft. 430 see.-ft.; May 19, 1 a.m., 3.30 ft., 450 sec.-ft., 2 a.m., 3.47 ft., 526 sec.- 

ft., 3 a.m., 3.67 ft., 625 sec.-ft., 6 a.m., 3.36 ft., 477 sec.-ft.; May 20, 6 p.m., 

3.42 ft., 504 sec.-ft.; May 21, 2 a.m., 3.50 ft., 540 sec.-ft.; May 26, 1 a.m., 3.53 

ft., 555 sec.-ft.; May 27, 6 p.m., 340 ft., 495 sec.-ft., 9 p.m., 3.60 ft., 590 sec.-ft
WALLA WALLA RIVER BASIN 247

Touchet River near Touohet, Wash.

Location.- Lat. 46°05'25", long. 118°39'40", in NE£ sec. 15, T. 7 N., R. 33 E., 100 feet

downstream from county road bridge, 5^ miles north of Touchet, and 4-| miles upstream

from mouth.

Drainage area.- 726 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

4,300 seoond-feet and extended to peak stage on basis of slope-area measurements.

Gage heights used to half tenths between 4.0 and 6.0 feet; hundredths below and

tenths above these limits. 

Maxima.- May-June 1948: Discharge, 2,510 second-feet noon May 9 (gage height, 7.51

1941 to April 1948: Discharge, 4,850 second-feet Feb. 26, 1948 (gage height, 

10.07 feet). 

Remarks.- Many large diversions above station for irrigation. Ho regulation.

Mean discharge, in second-feet, 194.8

Day

1

2

3

4

5

6

7

8

9

10

May

540

500

492

669

580

560

648

781

1,870

1,870

June

540

500

468

439

411

380

355

337

328

319

July

98

89

86

84

89

108

90

95

90

84

Day

11

}?.

13

14

15

16

17

18

19

20

May

1,470

1,240

1,510

1,470

1,180

985

885

835

1,200

1,110

June

313

301

286

272

263

337

261

224

283

212

July

77

76

76

71

67

63

60

59

67

92

Day

21

22

23

24

25

20

«7

28

29

30

31

Monthly mean discharge, in second-feet .. ... ......................

Runoff, in inches ............................................................................................................................

May

960

1,060

1,010

910

835

810

785

1,010

760

648

580

960

1.52

June

209

216

195

177

158

148

139

130

120

111

281

0.43

July

74

63

58

55

55

54

51

61

113

85

68

76.1

0.12

824933 O - 49 - 18
248 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

Pmatllla River Basin 

Umatllla River above Meacham Creek, near Gibbon, Oreg.

Location.- Lat. 45°43', long. 118°20', in SVf£ sec. 21, T. 3 N., R. 36 E., 0.8 mile 

downstream from Ryan Creek, 2j miles upstream from Meacham Creek, and 2j miles 

northeast of Gibbon. Datum of gage is 1,865.25 feet above mean sea level, datum 

of 1929,

Drainage area.- 125 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Rating curve defined by current-meter measurements below 1,950 

second-feet and extended to peak stage by logarithmic plotting.

Maxima.- May-June 1948: Discharge, 3,380 second-feet 1 p.m. May 22 (gage height, 6.88

1933 to April 1948: Discharge, 6,660 second-feet Dec. 12, 1946 (gage height, 

8.84 feet). 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

468

432

516

752

680

758

935

1,230

1,720

1,210

June

685

694

698

629

574

568

577

588

570

509

July

219

198

180

166

172

153

156

133

124

114

Day

11

12

13

14

15

16

17

18

19

20

May

1,050

1,000

1,400

1,200

1,030

1,100

1,110

922

1,130

1,210

June

461

413

417

384

351

345

314

293

306

311

July

114

108

100

97

94

91

88

89

88

86

Day

21

22

23

24

25

26

27

28

«9

30

31

Monthly mean discharge, in second-feet .......... . ... ... ................................

Runoff, in inches .............................................. . .......................................................................

May

1,220

2^720

2,140

1,630

1,430

1,370

1,340

1,190

839

700

732

1,134

10.46

June

796

656

520

440

388

340

302

274

255

246

463

4.14

July

81

78

76

72

70

67

70

103

85

74

67

110

1.02

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

ft 

1,2 

sec

Gage 

height Discharge

May 17

4.69 

4.54

1,100 

998

May 23

6.09 

5.94 

5.70 

5.65 

5.73 

5.58

Mi

4.46 

4.35 

4.27 

4.21 

4.20 

4.17

Ju

4.02 

3.98 

3.93 

3.91 

3.92 

3.90

2,410 

2,240 

1,980 

1,930 

2,010 

1,860

jy29

942 

865 

812 

776 

770 

752

ne4

662 

640 

615 

605 

610 

600

June 10

3.78 

3.73 

3.69 

3.65 

3.69 

3.67

540 

515 

496 

480 

496 

488

June 16

3.33 

3.31 

3.29 

3.31 

3.31 

3.29

352 

344 

336 

344 

344 

336

Gage 

height Discharge

May 18

4.50 

4.46 

4.41 

4.36 

4.33 

4.52

970 

942 

907 

872 

851 

984

May 24

5.50 

5.32 

5.17 

5.24 

5.39 

5.28

M

4.11 

4.06 

4.01 

4.00 

4.08 

4 .'31

Ju

3.87 

3.83 

3.80 

3.81 

3.88 

3.89

1,780 

1,610 

1,480 

1,540 

1,670 

1,570

iy30

716 

686 

656 

650 

698 

837

ne 5

585 

565 

550 

555 

590 

595

June 11

3.64 

3.61 

3.59 

3.56 

3.59 

3.58

Ju

3.27 

3.24 

3.21 

3.19 

3.19 

3.20

476 

464 

456 

444 

456 

452

ne!7

330 

319 

308 

302 

302 

305

Supplemental record.- May 22

, 1,880 sec. -ft.; May 24, 2 

90 sec. -ft. j May 27, 9 p.m. 

.-ft.

Gage 

height Discharge

May 19

4.67 

4.72 

4.72 

4.76 

4.81 

4.87

1,090 

1,120 

.1,120 

1,150 

1,190 

1,240

May 25

5.14 

5.05 

4.98 

5.06 

5.27 

5.14

Mi

4.21 

4.13 

4.08 

4.06 

4.13 

4.12

Jl

3.83 

3.80 

3.77 

3.82 

3.92 

3.89

1,450 

1,380 

1,320 

1,390 

1,560 

1,450

iy31

776 

728 

698 

686 

728 

722

me 6

565 

550 

535 

560 

610 

595

June 12

3.53 

3.49 

3.45 

3.43 

3.44 

3.52

432 

416 

400 

392 

396 428'

June 18

3.18 

3.16 

3.15 

3.14 

3.14 

3.23

298 

291 

288 

284 

284 

316

Gage 

height Discharge

May 20

4.85 

4.78 

4.72 

4.72 

5.00 

5.01

1,220 

1,170 

1,120 

1,120 

1,340 

1,350

May 26

5.03 

4.94 

4.86 

5.01 

5.23 

5.13

Ju

4.07 

4.03 

4.00 

4.00 

4.13 

4.12

Ju

3.87 

3.83 

3.80 

3.84 

3.89 

3.90

1,360 

1,290 

1,230 

1,350 

1,530 

1,440

nel

692 

668 

650 

650 

728 

722

ne7

585 

565 

550 

570 

595 

600

June 13

3.55 

3.49 

3.47 

3.45 

3.48 

3.50

440 

416 

408 

400 

412 

420

June 19

3.27 

3.22 

3.18 

3.16 

3.17 

3.16

330 

312 

298 

291 

294 

291

Gage 

height Discharge

May 21

4.92 

4.84 

4.79 

4.76 

4.79 

5.02

1,280 

1,210 

1,170 

1,150 

1,170 

1,360

May 27

4.98 

4.93 

4.80 

4.91 

5.15 

5.17

Ju

4.07 

4.03 

4.00 

4.02 

4.18 

4.17

Ju

3.88 

3.84 

3.81 

3.79 

4.01 

3.95

Ju

3.42 

3.37 

3.38

Jui

3.15 

3.12 

3.14 

3.24 

3.36 

3.40

1,320 

1,280 

1,180 

1,270 

1,460 

1,480

ne2

692 

668 

650 

662 

758 

752

ne8

590 

570 

555 

545 

656 

625

ne 14

388 

368 

372

ne20

288 

277 

284 

319 

364 

380

Gage 

height

M

5.70 

6.44 

6.81 

6.72 

6.59 

6.36

Discharge

ay 22

1,980 

2,820 

3,220 

3,170 

3,000 

2,720

May 28

4.89 

4.68 

4.52

Ju

4.11 

4.0T 

4.06 

4.05 

4.07 

4.06

Jl

3.88 

3.83 

3.79 

3.80 

3.85 

3.83

1,250 

1,100 

984

ne3

716 

692 

686 

680 

692 

686

ne9

590 

565 

545 

550 

575 

565

June 15

3.37 

3.34 

3.31 

3.28 

3.29 

3.37

Ju

3.91 

4.57 

4.43 

4.33 

4.26 

4.19

368 

356 

344 

333 

336 

368

ne21

605 

1,020 

921 

851 

806 

764

, 1 p.m., 6.88 ft., 3,380 sec. -ft.; May 23, 2 p.m., 5.60 

p.m., 5.14 ft. 1,450 sec. -ft.; May 25, 1 p.m., 4.94 ft., 

5.26 ft., 1,550 sec. -ft.; June 19, 2 a.m., 3.30 ft., 340
UMATILLA RtVER BASIH

Umatilla River at Pendleton, Oreg.

in NEj sec. 10, T. Z N., R. 32 E., at Pendleton, 

Datum of gage Is 1,062.54 feet above mean sea

Location.- Lat. 45°40', long. 118°48'.

2$ miles upstream from McKay Creek.

level, datum of 1923. 

Drainage area.- 637 square miles. 

Qage-height record.- Water-stage recorder graph except period 11 a.m. May 23 to 9 a.m.

May 2!, when there was no gage-height record. 

Discharge record.- Stage-discharge relation defined by current-meter measurements belov

3,500 second-feet and extended to peak stage. Gage heights used to hundredtha.

Discharge for period of no gage-height record computed on basis of gage-height graph

based on recorded range In stage.

Maxima.- May-June 1948: Discharge, 6,970 second-feet 8 to 10 p.m. May 22 (gage height, 

 TTTTU feet).

1891-92, 1903-5, 1921 to April 1948: Discharge, 13,700 second-feet Dec. 12, 1946

(gage height, 8.45 feet).

Flood of May 30-31, 1906, reached a stage of 11.0 feet (discharge, 15,500 secondfeet, estimated by Corps of Engineers).

Maximum flood known, 17,000 second-feet Dec. 14, 1882 (furnished by Corps of

Engineers). 

Remarks.- Small diversion above station for irrigation.

Mean discharge, in second-feet, 191t8

Day

1

2

3

4

5

6

7

8

9

10

May

1,330

1,245

1,240

1,860

1,860

1,790

2,230

2,530

4,150

3,640

June

1,230

1,180

1,150

1,080

984

935

923

903

908

822

July

306

266

238

221

338

263

228

211

189

172

Day

11^?,

13

14

15

Ifi

17

18

19

20

May

2,890

2,350

3,120

3,080

2,640

2,520

2,530

2,0,60

2,420

2,610

June

748

680

658

611

563

748

513

464

483

483

July

158

152

137

125

120

112

104

101

99

99

Day

21

2223

24

2526

917

28

29

30

31

Monthly mean discharge, in second-feet........ .._ , __ . _ ..... . _ ...... .. _ ..........

Runoff, in inches.................................................................. _ ...................................................

May

2,600

5,050

4,990

3,380

2,750

2,460

2,300

2,150

1,640

1,320

1,350

2,519

4.56

June

855

990

818

690

600

540

4*5

431

377

334

740

1.30

July

91

84

79

77

77

73

71

84

109

89

77

147

0.27

Gage height, in feet, and discharge, in second-feet, at indicated time,

8

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

^t | Discharge

May 17

3.73 

3.68 

3.67 

3.59 

3.42 

3.40

2,730 

2,650 

2,640 

2,520 

2,270 

2,240

May 23

5.54 

5.36 

5.13 

4.98 

4.90 

4.80

Hi

3.39 

3.19

Jc

2.84 

2.82 

2.84 

2.81 

2.77 

2.75

5,770 

5,320 

4,760 

4,410 

4,230 

4,010

iy29

1,630 

1,420

me 4

1,100 

1,090 

1,100 

1,080 

1,050 

1-,030

June 10

2.52 

2.50 

2.47 

2.42 

2.38 

2.39

Ju

3.10 

2.45 

2.14 

2.07 

2.02 

2:00

864 

850 

830 

798 

772 

778

ne!6

1,330 

818 

624 

584 

556 

545

Gage 

height Discharge

May 18

3.35 

3.26 

3.26 

3.22 

3.16 

3.18

2,180 

2,060 

2,060 

2,010 

1,930 

1,960

May 24

4.72 

4.65 

4.49 

4.33 

4.22 

4.31

Mi

3.16 

3.13 

3.08 

3.02 

2.98 

3.07

JB

2.75 

2.72 

2.69 

2.66 

2.62 

2.63

3,830 

3,680 

3,360 

3,050 

2,840 

3,010

ay 30

1,390 

1,360 

1,310 

1,260 

1,220 

1,300

me 5

1,030 

1,010 

983 

982 

934 

941

June 11

2.38 

2.36 

2.34 

2.34 

2.31 

2.27

772 

759 

746 

746 

726 

702

June 17

1.95 

1.86

518 

470

Gage 

height

Mi

3.50 

3.50 

3.58 

3.56 

3.56 

3.66

Discharge

y!9

2,380 

2,380 

' 2,500 

2,470 

2,470 

2,620

May 25

4.33 

4.23 

4.13 

4.08 

4.02 

4.13

Mi

3.25 

3.19 

3.13 

3.06 

3.01 

3.03

Jl

2.67 

2.65 

2.63 

2.59 

2.57 

2.61

3,050 

2,860 

2,670 

2,590 

2,480 

2,670

ay 31

1,480 

1,420 

1,360 

1,290 

1,250 

1,270

me 6

969 

955 

941 

913 

899 

927

June 12

2.28 

2.27 

2.24 

2.20 

2.19 

2.17

708 

702 

684 

660 

654 

642

June 18

1.85 

1.83

465 

455

Gage 

height Discharge

May 20

3.77 

3.72 

3.67 

3.60 

3.54 

3.58

2,790 

2,710 

2,640 

2,530 

2,440 

2,500

May 26

4.12 

4.03 

3.96 

3.91 

3.90 

4.03

Jtl

3.06 

3.03 

3.00 

2.96 

2.91 

2.95

Jr

2.64 

2.64 

2.61 

2.58 

2.56 

2.58

Jn

2.18 

2.25 

2.23 

2.19 

2.17 

2.16

Ju

1.86 

1.94 

1.93 

1.89 

1.86 

1.83

2,660 

2-, 500 

2,390 

2,310 

2,290 

2,500

mel

1,290 

1,270 

1,240 

1,200 

1,160 

1,200

ne7

948 

948 

927 

906 

892 

906

ne!3

648 

690 

678 

654 

642 

636

ne!9

470 

512 

506 

485 

470 

455

&i\ *» 

May 21

3.70 

3.72 

3.64 

3.62 

3.58 

3.55

2,680 

2,710 

2,590 

2,560 

2,500 

2,460

May 27

3.99 

3.90 

3.86 

3.85 

3.83 

3.94

2,430 

2,290 

2,230 

2,220 

2,180 

2,350

Jane 2

3.00 

2.97 

2.93 

2.88 

2.84 

2.93

Ju

2.62 

2.62 

2.59 

2.55 

2.52 

2.57

Ju

2.17 

2.16 

2.13 

2.09 

2.05 

2.05

Jai

1.82 

1.83 

1.86 

1.85 

2.04 

1.97

1,240 

1,210 

1,180 

1,130 

1,100 

1,180

me 8

934 

934 

913 

885 

864 

899

ne!4

642 

636 

618 

594 

572 

572

ie2Q

450 

455 

470 

465 

567 

528

h^t ] Discharge

May 22

3.63 

4.40 

5.28 

5.40 

5.68 

5.65

2,580 

3,960 

5,940 

6,230 

6,920 

6,840

May 28

4.00 

3.88 

3.80 

3.71 

3.65 

3.59

2,450 

2,260 

2,140 

2,010 

1,940 

1,860

June 3

2.99 

2.96 

2.90 

2.85 

2.82 

2.84

1,230 

1,200 

1,150 

1,110 

1,090 

1,100

June 9

2.66 

2.66 

2.59 

2.54 

2.50 

2.52

Jn

2.05 

2.04 

2.03 

2.01 

1.98 

2.12

Jni

1.98 

2.45 

2.52 

2.84 

2.83 

2.81

962 

962 

913 

878 

850 

864

ne!5

572 

567 

562 

550 

534 

612

ne21

534 

818 

864 

1,100 

1,090 

1,080

Supplemental record.- May 19, 

2,310 sec.-ft., 1 p.m., 3.50 ft. 

21, 6 a.m., 3.79'ft., 2,820 sec. 

2.55 ft., 885 sec.-ft., 11 a.m., 

ft.

3 a.m., 3.60 ft., 2,530 sec.-ft., 6 a.m., 3.45 ft., 

, 2,380 sec.-ft., 3 p.m., 3.57 ft., 2,480 sec.-ft.} May 

-ft.; June 21, 7 a.m., 2.03 ft., 562 sec.-ft., 8:30 a.m.

2.32 ft., 733 sec.-ft., 2 p.m., 2.79 ft., 1,060 sec.-
250 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Umatilla River at Yoakum, Oreg.

Location.- Lat. 45°41', long. 119°02', in SW-fc sec. 2, T. 2 N., R. 30 E., at highway 

bridge, half a mile northeast of Yoakum station and 2£ miles downstream from 

abandoned Furnish Reservoir. Datum of gage is 770.41 feet above mean sea level, 

datum of 1929.

Drainage area.- 1,280 square miles.

Gage-height record.- Water-stage recorder graph except period June 28 to 9 a.m. 

June 30, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements 

below 4,000 second-feet and extended to peak stage. Discharge for period of no 

gage-height record computed on basis of interpolated gage heights.

Maxima.- May-June 1948: Discharge, 6,430 second-feet 11 p.m. May 22 (gage height, 770"2" feet).

1903 to April 1948: Discharge, 20,000 second-feet May 30, 1906 (gage height, 

15.0 feet, datum then in use, from floodmarks), from rating curve extended above 

6,000 second-feet on basis of records for station near Umatllla.

Remarks.- Many diversions above station for irrigation. Flow regulated by McKay

Reservoir; outlet gates regulated May 3, 8, 10-15, 2Q, 21, June, 2, 5, 7, 13, July 2, 

3, 12, 15, 19, 25, 30.

Mean discharge, in secondDay

1

2

3

4

5

6

1

8

9

10

May

1*,810

1,650

1,640

2,420

2,460

2,430

2,980

3,270

t, 800

4,420

June

1,880

1,810

1,640

1,520

1,350

1,260

1,220

1,03C

1,010

931

July

343

308

326

430

387

502

462

462

446

422

Monthly mean discharge, in second-fee 

Runoff, in inches .......................................

Day

11

12

13

14

15

16

17

18

19

20

May

4,390

3,970

4,560

4,910

3,970

3,640

3,670

3,350

3,600

3,810

June

855

797

780

710

630

975

638

571

562

552

feet, 1948

July

402

414

362

340

336

350

354

350

350

366

t '

Day

21

22

28

24

25

26

27

28

29

80

31

..........

May

3,650

4,920

5,650

4,400

3,820

3,520

3,340

3,160

2,500

2,060

2,040

3,445 

3.10

June

908

1,180

958

790

680

596

551

488

430

374

923 

0.80

July

366

362

362

382

382

390

382

386

414

406

398

385 

0.35

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

I

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage height Discharge

May 17

5.18 

5.08 

4.93

3,800 

3,680 

3,500

May 23

6.93 

6.79 

6.54 

6.28 

6.02 

5.87

Mi

4.12 

3.94 

3.74

Jll

3.00 

3.00 

2.97 

2.93 

2.88 

2.83

6,300 

6,080 

5,710 

5,320 

4,940 

4,730

iy29

2,590 

2,410 

2,210

ne4

1,560 

1,560 

1,540 

1,500 

1,460 

1,420

June 10

2.17 

2.18 

2.17 

2.13 

2.07 

2.02

952 

958 

952 

928 

892 

862

June 16

1.78 

3.12 

2.28 

1.87 

1.72 

1.63

740 

1,660 

1,020 

785 

710 

665

Gage height Discharge

May 18

4.90 

4.87 

4.84 

4.76 

4.70 

4.64

3,460 

3,420 

3,390 

3,290 

3,220 

3,150

May 24

5.92 

5.82 

5.67 

5.48 

5.32 

5.25

4,800 

4,660 

4,450 

4,190 

3,990 

3,900

May 30

3.68 

3.65 

3.59 

3.51 

3.44 

3.46

Ju

2.82 

2.82 

2.66 

2.70 

2.66 

2.62

2,150 

2,120 

2,070 

2,000 

1,940 

1,950

ne5

1,420 

1,420 

1,290 

1,320 

1,290 

1,260

June 11

2.02 

2.02 

2.00 

1.97 

2.04 

1.97

Ju

1.60 

1.57 

1.4?

Supplemental record.

ft., 3,690 sec. -ft., 3 

sec. -ft.; June 3, 1 a.m 

sec. -ft., 1 p.m., 2.55 

10 p.m., 2.50 ft., 1,17 

2:30 a.m., 2.00 ft., 85 

1,420 sec.-ft.j June 21

862 

862 

850 

835 

874 

835

ne 17

650 

636 

592

Gage 

height Discharge

May 19

4.81 

5.05 

5.04 

5.10 

5.11 

5.12

3,350 

3,640 

3,630 

3,700 

3,710 

3,730

May 25

5.40 

5.35 

5.22 

5.08 

4.96 

4.96

Mi

3.53 

3.72 

3.63 

3.54 

3.46 

3.41

Jll

2.64 

2.68 

2.65 

2.61 

2.56 

2.54

Ju

1.88 

1.91 

1.90 

1.87 

1.86 

1.91

4,090 

4,020 

3,860 

3,680 

3,530 

3,530

iy31

2,020 

2,190 

2,110 

2,030 

1,950 

1,910

ne6

1,270 

1,300 

1,280 

1,250 

1,210 

1,200

ne!2

790 

805 

800 

785 

780 

805

June 18

1.42 

1.42

1.40

569 

569 

560

Gage 

height Discharge

May 20

5.25 

5.34 

5.32 

5.12 

5.02 

4.96

M:

5.11 

5.10 

4.98 

4.88 

4.77 

4.79

Jl]

3.44 

3.43 

3.40 

3.37 

3.30 

3.26

Jl

2.60 

2.62 

2.61 

2.58 

2.53 

2.33

Ju

1.84 

1.83 

1.88 

1.91 

1.85 

1.80

3,900 

4,010 

3,990 

3,730 

3,600 

3,530

iy26

3,710 

3,700 

3,560 

3,440 

3,300 

3,330

ne 1

1,940 

1,930 

1,900 

1,870 

1,810 

1,770

ne7

1,240 

1,260 

1,250 

l',230 

1,190 

1,050

nel3

770 

765 

790 

805 

775 

750

June 19

1.39 

1.42 

1.40

556 

569 

560

Gage 

height Discharge

May 21

5.10 

5.20 

5.16 

5.00 

4.96 

4.96

3,700 

3,830 

3,780 

3,580 

3,530 

3,530

May 27

4.95 

4.94 

4.84 

4.74 

4.64 

4.62

3,520 

3,510 

3,390 

3,270 

3,150 

3,130

June 2 _,

3.34 

3.38 

3.35 

3.28 

3.22 

3.15

Ju

2.33 

2.35 

2.35 

2.30 

2.24 

2.21

1,850 

1,880 

1,860 

1,790 

1,740 

1,680

ne8

1,050 

1,060 

1,060 

1,030 

994 

976

June 14

1.74 

1.72 

1.73 

1.71 

1.70 

1.65

Ju

1.38 

1.38 

1.38

720 

710 

715 

705 

700 

675

tie 20

551 

551 

551

Gage 

height Discharge

May 22

4.98 

5.20 

5.95. 

6.76 

6.91 

7.00

3,560 

3,830 

4,840 

6,040 

6,260 

6,400

.May 28

4.82 

4.85 

4.74 

4.57 

4.43 

4.31

3,360 

3,400 

3,270 

3,080 

2,920 

2,790

June 3

3.14 

3.18 

3.13 

3.07 

3.02 

2.99

Jll

2.27 

2.35 

2.34 

2.27 

2.19 

2.16

1,670 

1,700 

1,660 

1,620 

1,580 

1,550

ne9

1,010 

1,060 

1,060 

1,010 

964 

946

June 15

1.57 

1.57 

1.57 

1.54 

1.51 

1.49

Ju

1.60 

1.58 

2.16 

2.36 

2.66 

2.67

636 

636 

636 

623 

610 

600

ne21

650 

641 

946 

1,070 

1,290 

1,300

- May 19, 6 a.m., 5.12 ft., 3,730 sec. -ft.} May 21, 2 p.m., 5.09 

p.m., 4..90 ft., 3,460 sec. -ft.; May 22, 11 p.m., 7.02 ft., 6,430 

., 3.08 ft., 1,620 sec.-ft.j June 5, 11 a.m., 2.80 ft., 1,400 

ft.,' 1,200 sec. -ft., 3 p.m., 2.72 ft., 1,340 sec. -ft.; June 7, 

3 sec. -ft.; June 8, 2 a.m., 2.31 ft., 1,040 sec. -ft.; June 16, 

3 sec. -ft., 5 a.m., 2.96 ft., 1,530 sec. -ft., 6 a.m., 2.82 ft., 

, 2 a.m., 1.63 ft., 665 sec. -ft., 11 a.m., 1.62 ft., 660 sec. -ft.
UMATILLA RIVER BASIN 251

Umatllla River near Umatllla, Oreg.

Location.- Lat. 45°54 I , long. 119°20', in KW^ sec. 21, T. 5 N., R. 28 E., if miles 

downstream from West Division main canal of Umatllla project and 2 miles upstream 

from Umatllla and mouth of river. Datum of gage is 330.57 feet above mean sea 

level, datum of 1929.

Drainage area.- 2,290 square miles.

gage-height "record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

6,000 second-feet. Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 6,080 second-feet 8 p.m. May 23 (gage height, 6.26

1903 to April 1948: Discharge observed, 19,600 second-feet May 31, 1906 (gage 

height, 11.0 feet).

Remarks.- Many diversions above station for irrigation; Brownell Canal diverts below 

station. Plow regulated by McKay and Cold Springs Reservoirs.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,440

1,330

1,250

1,800

2,300

2,160

2,560

3,050

3,950

4,840

June

1,530

1,280

1,130

1,010

893

764

692

567

456

674

July

11

12

12

11

14

186

130

110

107

102

Day

11

12

13

14

1ft

16

17

18

19

20

May

4,450

4,560

4,280

5,080

4,660

3,900

3,870

3,700

3,570

3,940

June

686

533

577

526

418

612

482

336

282

276

July

69

85

61

26

14

13

11

11

11

11

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet.. .................... ....................... ....................

Runoff, in inches .................................... .................... .................................................*...........

May

3,760

3,780

5,670

4,720

4,050

3,510

3,220

3,030

2,370

1,850

1,660

1.69

June

324

857

710

478

306

174

72

35

15

13

0.27

July

11

25

17

15

18

14

14

23

25

65

44

0.02

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.39 

5.37 

5.37 

5.43 

5.45 

5.44

Mi

5.90 

6.13 

6.21 

'6.22 

6.26 

6.15

M

4.87 

4.80 

4.74 

4.67 

4.58 

4.58

Ju

3.93 

3.92 

3.89 

3.90 

3.88 

3.86

3,830 

3,780 

3,780 

3,920 

3,980 

3,950

y23

5,130 

5,730 

5,950 

5,970 

6,080 

5,780

iy29

2,630 

2,480 

2,360 

2,220 

2,120 

2,040

ne4

1,040 

1,020 

989 

1,000 

978 

956

June 10

3.59 

3.57 

3.51 

3.68 

3.67 

3.66

671 

653 

599 

760 

750 

740

June 16

3.18 

3.20 

3.17 

4.06 

3.83 

3.56

348 

360 

342 

1,200 

923 

644

h^t | Discharge

May 18,

5.38 

5.34 

5.33 

5.31 

5.30 

5.28

Mi

5.97 

5.70 

5.66 

5.64 

5.60 

5.62

M

4.54 

4.50 

4.48 

4.45 

4.37 

4.37

Ju

3.84 

3.83 

3.80 

3.80 

3.76 

3.71

Ju

3.65 

3.63 

3.62 

3.61 

3.59 

3.37

3,800 

3,710 

3,680 

3,630 

3,610 

3,560

y24

5,130 

4,610 

4,510 

4,450 

4,350 

4,400

»y30

1,970 

1,890 

1,850 

.1,800 

- 1,750 

1,660

neft

934 

923 

890 

890 

846 

791

nell

730 

710 

700 

690 

671 

486

June 17

3.44 

^37 

3.32 

3.30 

3.34 

3.27

542 

486 

446 

430 

462 

409

Gage 

height Discharge

May 19

5.24 

5.22 

5.24 

5.34 

5.33 

5.37

3,470 

3,420 

3,470 

3,710 

3; 680 

3,780

May 25

5.53 

5.47 

5.49 

5.48 

5.43 

5.34

4,180 

4,020 

4,080 

4,050 

3,920 

3,710

May 31

4.36 

4.36 

4.36 

4.41 

4,38 

4.34

Ju

3.71 

3.70 

3.67 

3.67 

3.67 

3.65

1,640 

1,640 

1,640 

1,730 

1,680 

1,610

me 6

791 

780 

750 

750 

750 

730

June 12

3.36 

3.43 

3.38 

3.48 

3.50 

3.48

478 

534 

494 

574 

590 

574

June 18

3.22 

3.20 

3.17 

3.11 

3.08 

3.08

374 

360 

342 

306 

289 

289

Gage 

height Discharge

May 20

5.38 

5.38 

5.44 

5.50 

5.52 

5.44

3,800 

3,800 

3,950 

4,100 

4,150 

3,950

May 26

5.26 

5.24 

5.29 

5.29 

5.22 

5.16

3,510 

3,470 

3,590 

3,590 

3,420 

3,280

June 1

4.31 

4.37 

4.35 

4.27 

4.18 

4.15

1,560 

1,660 

1,620 

1,500 

1,360 

1,320

June?

3.64 

3.63 

3.61 

3.60 

3.58 

3.56

720 

710 

690 

680 

662 

644

June 13

3.47 

3.49 

3.52 

3.48 

3.46 

3.48

566 

582 

608 

574 

558 

574

June 19

3.09 

3.09 

3.07 

3.07 

3.02 

3.07

294 

294 

283 

283 

255 

283

Gage 

height Discharge

May 21

5.35 

5.31 

5.34 

5.40 

5.40 

5.31

3,730 

3,630 

3,710 

3,850 

3,850 

3,630

May 27

5.11 

5.12 

5.17 

5.16 

5.13 

5.08

3,160 

3,190 

3,300 

3,280 

3,210 

3,090

June 2

4.14 

4.13 

4.12 

4.13 

4.11 

4.08

Ju

3.56 

3.53 

3.45 

3.41 

3.39 

3.38

1,310 

1,290 

1,280 

1,290 

1,260 

1,220

ne8

644 

617 

550 

518 

502 

494

June 14

3.49 

3.46 

3.45 

3.36 

3.35 

3.34

582 

558 

550 

478 

470 

462

June 20

3.09 

3.07 

3.06 

3.04 

3.03 

3.03

294 

283 

278 

266 

261 

261

Gage 

height Discharge

May 22

5.29 

5.27 

5.28 

5.35 

5.52 

5.68

3,590 

3,540 

3,560 

3,730 

4,150 

4,560

May 28

5.05 

5.05 

5.09 

5.09 

5.03 

4.95

Ju

4.06 

4.03 

3.98 

3.98 

3.95 

3.95

3,020 

3,020 

3,120 

3,120 

2,980 

2,800

ne3

1,200 

1,160 

1,100 

1,100 

1,060 

1,060

June 9

3.36 

3.33 

3.28 

3.30 

3.35 

3.37

478 

454 

416 

430 

470 

486

June 15

3.33 

3.32 

3.30 

3.25 

3.22 

3.19

454 

446 

430 

395 

374 

354

June 21

3.04 

3.06 

3.13 

3.15 

3.14 

3.51

266 

278 

318 

330 

324 

599
252 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

McKay Creek near Pilot Rook, Oreg,

Location.- Lat. 45e 33', long. 118*46', in NEi sec. 23, T. IN., R. 32 E., 400 feet 

downstream from county road bridge, three-quarters of a mile upstream from maximum flow line (altitude, 1,322 feet)of McKay Reservoir, and 6 miles northeast of 

Pilot Rock. Datum of gage is 1,335.85 feet above mean sea level, datum of 1929.

Drainage area.- 178- square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used July 24-31.

Maxima.- May-June 1948: Discharge, 1,140 second-feet 5:30 a.m. May 13 (gage height, 

4.35 feet).

1921, 1926 to April 1948: Discharge, 6,000 second-feet Apr. 1, 1931 (gage 

height, 10.4 feet, site and datum then in use).

Remarks.- Many small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

334

326

326

373

342

382

500

574

891

940

June

171

148

129

119

107

93

80

69

60

56

July

26

24

24

24

29

27

18

17

15

12

Day

11

12

13

14

15

16

17

18

19

20

May

926

816

980

858

684

580

503

465

542

527

June

56

53

55

50

47

89

69

58

56

56

July

12

11

10

10

9.5

8.2

7.8

6.6

6.6

6.2

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .. .... ........................... _ .................

Runoff, in inches ............................................................................................................................

May

494

523

495

418

353

300

259

233

203

174

174

3.24

June

16'2

174

142

116

97

73

68

50

38

33

85.8

0.54

July

5.8

5.8

5.4

5.4

5.4

5.4

5.4

5.0

5.0

5.0

5.0

0.08

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.35 

3.30 

3.25

Mi

3.55 

3.27 

3.23

Mi

2.58 

2.54 

2.50

Ju

2.22 

2.18 

2.17

515

490 

468

iy23

515 

476 

458

iy29

209 

198 

187

ne4

124 

116 

114

June 10

1.85 

1.83 

1.82

Ju

1.98 

2.10 

2.04 

2.03 

2.00 

1.97

58 

56 

54

ne!6

80 

101 

90 

88 

83 

78

Gage 

height Discharge

May 18

3.32 

3.26 

3.22 

3.19 

3.18 

j 3.27^

500 

472 

454 

440 

436 

476

May 24

3.18 

3.10 

3.05

M

2.49 

2.47 

2.45 

2.41 

2.40 

2.45

Ju

2.15 

2.12 

2.08

Ju

1.82 

1.82 

1.82 

1.83 

1.82 

1.83

436 

400 

378

ay 30

184 

180 

174 

164 

162 

174

ne 5

110 

105 

97

ne 11

54 

54 

54 

56 

54 

56

June 17

1.93 

1.90 

1.86

71 

66 

60

Gage 

height Discharge

May 19

3.46 

3.46 

3.41 

3.37 

3.38 

3.42

570 

570 

545 

525 

530 

550

May 25

3.03 

2.96 

2.93

Mi

2.51 

2.49 

2.45 

2.42 

2.39 

2.41

Ju

2.08 

2.05 

2.01

Ju

1.82 

1.82 

1.80 

1.78 

1.94 

1.791

Ju

1.85 

1.85 

1.85

368 

338 

326

»y31

190 

184 

174 

167 

160 

164

ne6

97 

92 

85

ne!2

54 

54 

51 

48 

73 

50

ne!8

58 

58 

58

height | Dischar*e

May 20

3.39 

3.35 

3.34

Mi

2.90 

2.83 

2.79

Ju

2.51 

2.49 

2.44 

2.41 

2.38 

2.36

Ju

2.01 

1.97 

1.93

535 

515 

510

iy26

313

287 

273

inel

190 

184 

172 

164 

158 

153

ne7

85 

78 

71

June 13

1.79 

1.80 

1.82 

1.81 

1.84 

1.81

50 

51 

54 

51 

57 

52

June 19

1.85 

1-.83 

1.80

58 

56 

51

Gage 

height

Mi

3.33 

3.29 

3.26

Discharge

iy21

505 

486 

472

May 27

2.79 

2.78 

2.75 

2.72 

2.69 

2.71

273 

269 

260 

250 

240 

246

June 2

2.36 

2.33 

2.28

Ju

1.93 

1.91 

1.88

153 

147 

136

neS

71 

68 

63

June 14

1.82 

1.78 

1.75

54 

48 

44

June 20

1.80 

1.82 

1.95

51 

54 

74

Gage 

Jieight

M

3.27 

3.35 

3.47 

3.40 

3.38 

3.38

Discharge

iy22

476 

515 

575 

540 

530 

530

May 28

2.69 

2.65 

2.61

Ju

2.27 

2.22 

2.20

Jl

1.88 

1.85 

1.84

Ju

1.75 

1.74 

1.74 

1.73 

1.72 

2.16

Ju

2.01 

2.14 

2.60 

2.57 

2.54 

2.52

240 

228 

217

me 3

134 

124 

120

me 9

63 

58 

57

ne 15

44 

43 

43 

42 

41 

112

ne21

85 

109 

214 

206 

198 

192

Supplemental record.- May 18, 10 p.m., 3.29 ft., 486 sec.-ft.j June 11, 2 p.m., 1.91 

ft., 68 sec.-ft.j June 12, 7 p.m., 1.78 ft., 48 sec.-ft., 9 p.m., 1.83 ft., 56 sec.- 

ft.} June 13, 5:30 p.m., 2.00 ft., 83 sec.-ft.; June 15, 10 p.m., 1.71 ft., 39 sec.- 

ft., 11:30 p.m., 2.24 ft., 128 sec.-ft.; June 16, 1 a.m., 1.90 ft., .66 sec.-ft., 2 a.a» 

2.17 ft., 114 sec.-ft.j June 21, 10 a.m., 2.62 ft., 220 sec.-ft.
UMA.TTLLA RIVER BASIN 255

McKay Creek near Pendleton, Oreg.

Location.- Lat. 45*37', long. 118*48", In see. 34, T. 2 N., R. 32 E., Juat upstream

from Irrigation diversion dam, a quarter of a mile downstream from McKay Dam, and

4 miles south of Pendleton. 

Drainage area.- 236 square miles. 

Gage-height record.- Water-stage recorder graph except periods 2 a.m. May 11 to 10 a.m.

May 12, 9 a.m. May 13 to 10 a.m. May 15, for which graph was reconstructed on basis

of dally gage readings, two discharge measurements, and records for McKay Creek near

Pilot Rock and Umatllla River at Yoakum.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge observed, 1,270 second-feet 2 to 3 p.m. May 13 (gage

height, 2.68 feet).

1918 to April 1948: Discharge observed, 3,250 second-feet Feb. 10, 1921 (gage

height, 4.4 feet, site and datum then In use), from rating curve extended above

1,200 second-feet. 

Remarks.- Diversions above station for Irrigation. Flow completely regulated since

1927 by McKay Reservoir. Maximum eJLavatlon McKay Reservoir during flood period,

1,321.9 feet probably on May 13 (contents, 73,550 acre-reet), from floodmarks.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

251

251

330

404

404

404

404

479

550

612

June

458

434

288

288

261

270

230

80

78

78

July

15

55

109

230

230

226

230

233

233

233

Day

11

12

13

14

15

16

17

18

19

20

May

1,000

900

1,100

1,100

800

696

696

689

682

544

June

78

78

70

17

17

17

18

18

18

18

July

233

249

218

218

241

254

254

254

266

283

Day

21

22

28

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ,,,..,,. ,.,. ._..,.... .................................................

Runoff, in inches ............................................................................................................................

May

440

464

464

464

470

470

470

464

464

458

458

561

2.74

June

19

19

18

16

15

15

15

15

15

14

99.2

0.47

July

283

283

283

279

301

320

320

320

320

329

344

247

1.20
854 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Birch Creek at Rieth, Oreg.

Location.- Lat. 45°39', long. 118°53', in SE£ sec. 13, T. 2 N., R. 31 E., a quarter of

a mile upstream from mouth and half a mile southwest of Rieth. 

1'"a 1 nage area.- 291 square miles. 

'jage height record.- Water-stage recorder graph.

£ * ocharge record.- Stage-discharge relation defined by current-meter measurements. , 

Maxima.- May-June 1948: Discharge, 760 second-feet 8 a.m. May 14 (gage height, 4.70

feet).

1921-23, 1927 to April 1948: Discharge, 1,640 second-feet Jan. 29, 1928 (gage

height, 6.00 feet site and datum then in use), from rating curve extended above

300 second-feet. 

Remarks.- Numerous canal head-gate regulations materially affected natural discharge

after June 1.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

186

171

168

214

227

264

426

438

483

492

June

176

149

131

124

115

102

88

80

69

61

July

14

6.0

3.6

2.4

4.2

10

9.2

8.8

10

9.6

Day

11

IB

13

14

15

16

17

18

19

80

May

528

573

725

760

561

522

512

528

652

699

June

58

60

62

64

59

83

74

72

66

66

July

7.0

6.2

4.9

2.8

1.5

1.4

4.5

6.8

6.8

4.0

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

666

678

607

517

460

398

356

304

248

211

196

444

1.76

June

75

71

60

50

45

42

27

21

24

13

72.9

0.28

July

1.2

5.8

6.0

4.2

4.0

4.7

4.5

3.0

2.0

4.9

2.4

5.37

0.02

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

h

K

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.93 

3.97 

3.93 

3.90 

3.84 

3.80

519 

531 

519 

510 

495 

485

May 23

4.35 

4.30 

4.25 

4.16 

4.06 

4.05

Mi

2.79 

2.69 

2.60

645 

650 

615 

588 

558 

555

iy29

258 

238 

225

Gage 

height Discharge

May 18

3.86 

4.04 

4.04 

3.98 

3.93 

3.94

500 

552 

552 

534 

519 

522

May 24

4.05 

4.01 

5.96 

3.82 

3.75 

3.76

M

2.57 

2.46 

2.40

555 

543 

528 

490 

472 

475

iy30

220 

204 

195

Gage 

height Discharge

May 19

4.17 

4.40 

4.45 

4.49 

4.48 

4.57

591 

660 

675 

687 

684 

714

May 25

3.79 

3.77 

3.74 

3.66 

3.58 

3.57

482 

478 

470 

450 

430 

428

May 31

2.46 

2.49 

2.44 

2.39 

2.33 

2.30

204 

208 

201 

194 

184 

180

Gage 

height Discharge

May 20

4.60 

4.58 

4.50 

4.47 

4.50 

4.48

725 

718 

690 

681 

690 

684

May 26

3.57 

3.54 

3.48 

5.40 

3.30 

3.28

428 

420 

405 

385 

560 

356

Junel

2.32 

2.32 

2.30 

2.27 

2.21 

2.15

183 

183 

180 

176 

166 

158

Gage 

height Discharge

May 21

4.44 

4.45 

4.42 

4.37 

4.36 

4.48

672 

675 

666 

651 

648 

684

May 27

3.36 

3.58 

3.52 

3.25 

3.15 

3.12

375 

380 

365 

546 

330 

324

June 2

Gage 

height

Mi

4.47 

4.50 

4.50 

4.45 

4.41 

4.38

Discharge

»y 22

681 

690 

690 

675 

663 

654

May 28

3.08 

2.98 

2.87

316 

296 

274

June 3

Supplemental record.- May 18, 10 a.m., 4.11 feet, 573 sec.-ft.; May 20, 6 p.m., 4.42 

ft.,666 sec.-ft.
OMATTTiLA RIVER BASIN 255

Butter Creek near Pine City, Oreg.

Location.- Lat. 45°33', long. 119°18', in S| sec. 22, T. IN., R. 28 E., half a mile

below Mattlock Canyon, 6 miles southeast of Pine City, and 20 miles south of

Henniston.

Drainage area.- 291 square miles. 

Gage-height record.- Water-stage recorder graph except period 12:30 p.m. May 19 to

10:30 a.m. May 24, when there was no gage-height record. 

Discharge records Stage-discharge relation defined by current-meter measurements below

205 second-feet and extended to peak stage. Discharge for period of no gage-height

record computed on basis of unpublished records for statibn at Foley's Bridge near

Echo.

Maxima.- May-June 1948: Discharge, 261 second-feet May 19 (gage height, 2.70 feet). 

 T921 to April 1948: Discharge, 1,600 second-feet Jan. 28, 1942 (gage height,

7.91 feet). 

Remarks.- Small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

93

90

82

107

115

114

120

115

109

114

June

83

73

65

67

63

56

51

47

49

47

July

20

20

18

18

25

24

22

21

19

17

Day

11

12

18

14

15

16

17

18

19

20

May

114

105

120

118

111

106

107

129

240

230

June

48

52

66

62

51

46

44

42

46

44

July

16

15

14

13

12

8.2

7.4

7.8

7.8

7.8

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ........... . . ........ .

Runoff, in inches ............................................................................................................................

May

210

190

170

154

140

128

127

118

106

95

90

128

0.51

June

56

57

53

47

42

36

32

28

21

22

49.9

0.19

July

7.4

7.1

6.8

7.1

6.4

6.8

6.4

6.4

7.4

7.4

6.8

12.5

0.05

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

,SSi| Discharge

May 17

1.48 

1.47 

1.49 

1.51 

1.52 

1.53

105 

103 

106 

108 

109 

111

May 23

May 29

1.51 

1.47 

1.46

Ju

1.13 

1.18 

1.16

108 

103 

102

ne4

64 

70 

68

June 10

1.00 

1.00 

.93 

.92 

.91 

.91

Ju

.95 

.95 

.95

51 

51 

45 

44 

43 

43

tie 16

46 

46 

46

Gage 

height Discharge

May 18

1.55 

1.57 

1.69 

1.75 

1.79 

1.97

Ma

1.89 

1.87 

1.85 

1.82

Mi

1.42 

1.38 

1.35

Ju

1.12 

1.11 

1.08

113 

115 

130 

137 

142 

164

y24

154 

151 

149 

145

iy30

97 

93 

89

ne5

63 

62 

59

June 11

.90 

.91 

.96 

1.02 

1.04 

1.00

42 

43 

47 

53 

55 

51

June 17

.93 

.92 

.90

45 

44 

42

height I 018"*"*6

May 19

2.26 

2.40 

2.66

202 

220 

255

May 25

1.78 

1.77 

1.72

141 

139 

133

May 31

1.32 

1.32 

1.38 

1.41 

1.37 

1.35

85 

85 

93 

96 

91 

89

June 6

1.06 

1.04 

1.03

57 

55 

54

June 12

.98 

.97 

.95 

.94 

.97 

1.78

49 

48 

46 

46 

48 

141

June 18

.90 

.89 

.93

42 

41 

45

Gage 

height

Ma

Discharge

y20

May 26

1.67 

1.67 

1.65

Ju

1.39 

1.31 

1.28 

1.27 

1.25 

1.23

Ju

1.01 

.99 

.98

127 

127 

125

nel

94 

84 

81 

80 

78 

75

ne 7

52 

50 

49

June 13

1.06 

1.14 

1.08 

1.09 

1.06 

1.03

57 

65 

59 

60 

57 

54

June 19

.98 

.94 

.91

49 

46 

43

Gage 

height Discharge

May 21

May 27

1.71 

1.69 

1.69 

1.66 

1.64 

1.61

Ju

1.21 

1.21 

1.18

132 

130 

130 

126 

124 

120

ne2

73 

73 

70

June 8

.96 

.94 

.93

47 

46 

45

June 14

1.06 

1.18 

1.12 

1.08 

1.06 

1.04

57 

70 

63 

59 

57 

55

June 20

.90 

.93 

.95

42 

45 

46

hGe^t | N"*-"-

May 22

May 28

1.58 

1.60 

1.56

117 

119 

114

June 3

1.14 

1.13 

1.13

Ju

.92 

.92 

.92 

.92 

.98 

1.04

65 

64 

64

ne9

44 

44 

44 

44 

49 

55

June 15

1.01 

.98 

.97

52 

49 

48

June 21

.98 

1.02 

1.07 

1.12 

1.12 

1.09

49 

53 

58 

63 

63 

60

Supplemental record.- May 27, 3 a.m., 1.62 ft.., 121 sec.-ft.; June 9, 9:30 a.m., 1.33 

ft., 87 sec.-ft.; June 10, 6 a.m., 0.95 ft., 46 sec.-ft.; June 11, 10 a.m., 0.98 ft., 

49 sec.-ft.; June 12, 10 p.m., 1.20 ft., 72 sec.-ft., 11 p.m., 1.12 ft., 63 sec.-ft.; 

June 14, 5 a.m., 1.24 ft., 76 sec.-ft.
256 FLOODS OF MAY-JOKE 1948 IN COLUMBIA RIVER BASIN

John Day River Basin

John Day River at Prairie City, Oreg.

Location.- Lat. 44e 27", long. 118e 43", In KE$ sec. 10, T. 13 S., R._ 33 E., 600 feet upstream from power plant and outlet of Prairie power canal, a third of a mile below

Dixie Creek, and three-quarters of a mile southwest of Prairie City. Datum of-gage

Is 3,496.99 feet above mean sea level, datum of 1929. 

Drainage area.- 231 square miles. 

Gage-height "record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- Hay-June 1948: Discharge, 1,150 second-feet 1:30 a.m. May 28 (gage height,

B7IT feet).

1926 to April 1948: Discharge observed, 1,550 second-feet Mar. 19, 1932 (gage

height, 4.7 feet, former site and datum), from rating curve extended above 500

second-feet. 

Remarks.- Diversions above station for Irrigation and for power; diversion In Prairie

power canal measured as 60 second-feet Apr. 21 and May 27, 57 second-feet June 20,

and 37 second-feet Aug. 10.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

240

221

232

273

265

299

435

455

398

348

June

576

583

654

780

704

652

637

687

622

571

July

80

76

83

80

95

86

80

66

60

51

Day

11

12

13

14

15

16

17

18

19

20

May

311

296

314

329

341

385

479

519

497

452

June

507

420

372

328

307

314

278

286

291

289

July

51

44

40

38

38

36

32

28

28

28

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ...........................................................................................................................

May

600

948

915

905

917

975

1,080

1,090

914

724

630

542

2.70

June

300

276

253

226

203

162

136

110

83

85

390

1.88

July

32

32

26

28

26

24

24

28

24

22

20

45.4

0.23

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

8&\ Discharge

May 17

3.40 

3.50 

3.56

462 

497 

519

May 23

4.63 

4.55 

4.57

M:

4.74 

4.69 

4.65 

4.49 

4.31 

4.27

Ju

4.25 

4.33 

4.29 

4.24 

4.19 

4.16

938 

904 

912

iy29

984 

963 

946 

879 

805 

789

ne4

781 

813 

797 

777 

757 

745

June 10

3.76 

3.59 

3.75

Ju

2.99 

2.98 

3.02 

2.88 

2.84 

2.84

591 

529 

588

nel6

329 

326 

338 

296 

285 

285

Gage 

height Discharge

May 18

3.58 

3.50 

3.64

526 

497 

547

May 24

4.60 

4.51 

4.53

Mi

4.14 

4.04 

4.00

Ju

4.13 

4.10 

4.06 

4.01 

3.97 

3.98

Ju

3.58 

3.44 

3.37

925 

887 

696

iy30

737 

698 

682

ne5

733 

721 

705 

686 

671 

674

nell

526 

476 

452

June 17

2.84 

2.80 

2.77

285 

273 

265

Gage 

height Discharge

May 19

3.57 

3.46 

3.42 

3.45 

3.52 

3.50

522 

483 

469 

480 

504 

497

May 25

4.59 

4.57 

4.64

921 

912 

942

May 31

3.87 

3.82 

3.79

633 

614 

602

June 6

3.98 

3.97 

3.93 

3.87 

3.85 

3.87

674 

671 

655 

633 

625 

633

June 12

3.34 

3.20 

3.20

442 

395 

395

June 18

2.79 

2.80 

2.82 

2.84 

2.95 

2.96

270 

273 

279 

285 

317 

320

Gage 

height Discharge

May 20

3.39 

3.31 

3.33

Mi

4.70 

4.72 

4.82

Jl

3.75 

3.66 

3.73

Jl

3.90 

3.92 

3.91 

3.85 

3.83 

3.89

459 

431 

438

iy26

967 

976 

1,020

ne 1

588 

555 

580

ne7

644 

652 

646 

625 

617 

640

June 13

3.17 

3.08 

3.06

385 

357 

351

June 19

2.90 

2.82 

2.77

302 

279 

265

Gage 

height

M:

3.35 

3.35 

3.36 

3.82 

4.59 

4.81

Discharge

iy2l

445 

445 

448 

614 

921 

1,010

May 27

4.94 

4.95 

4.98 

4.99 

4.95 

5.06

Ju

3.75 

3.72 

3.76

Ju

4.20 

4.16 

4.01 

3.92 

3.66 

3.90

1,070 

1,080 

1,090 

1,100 

1,080 

1,130

ne2

588 

576 

591

ne8

761 

745 

666 

652 

636 

644

June 14

3.05 

2.93 

2.88

348 

311 

296

June 20

2.78 

2.93 

2.94

267 

311 

314

OJ£ | Discharge

May 22

4.87 

4.79 

4.62 

4.48 

4.49 

4.53

1,040 

1,010 

933 

875 

879 

896

May 28

5.01 

5.00 

4.97 

4.96 

4.90 

4.83

1,100 

1,100 

1,090 

1,080 

1,060 

1,020

June 3

3.60 

3.82 

3.86 

3.93 

4.16 

4.21

Jl

3.90 

3.79 

3.78j

606 

614 

629 

655 

745 

765

ne9

644 

602 

599

June 15

2.89 

2.92 

3.00

Ju

2.91 

2.87 

2.85

299 

306 

332

ne21

305 

293 

288

Supplemental record.- May 28, 1:30 a.m., 5.11 ft., 1,150 sec.-ft.
JOHK DAT RIVER BASIN 257

John Day River at Picture .Oorge, near Dayville, Oreg.

Location.- Lat. 44"31'20", long. US'ST'SO", in sec. 20, T. 12 S., R. 26 E., on John 

Day Highway, 0.7 mile upstream from Rock Creek bridge and 7 miles northwest of Dayville. Datum of gage is 2,232.10 feet above mean sea level, datum of 1929.

Drainage area.- 1,640 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.-^Stage-dlscharge relation defined by current-meter measurements below 

4,100 second-feet and extended to'peak stage.

Maxima.- May-June 1948: Discharge, 6,520 second-feet 9 a.m. May 22 (gage height, 13.72

1926 to April 1948: Discharge, 6,000 second-feet Mar. 19, 1932 (gage height, 14.0 

feet), -from rating curve extended above 2,300 second-feet. 

Remarks.- Many diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,940

1,780

1,760

2,200

2,140

2,230

2,610

2,890

2,650

2,340

June

2,870

2,640

2,590

2,790

2,980

2,770

2,600

2,680

2,720

2,480

July

615

567

515

487

548

583

540

508

477

441

Day

11

12

13

14

15

16

17

18

19

20

May

a, 080

1,930

1,920

1,930

1,920

1,970

2,210

2,550

2,910

3,190

June

2,620

2,300

1,980

1,770

1,580

1,640

1,660

1,570

1,490

1,540

July

419

387

361

334

310

288

257

245

240

232

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...................................................................... _ .....

Runoff, in inches............................................................................................................................

May

3,150

5,580

5,070

4,490

4,130

4,540

4,400

4,270

4,040

3,540

3,240

2,955

2.08

June

1,720

1,650

1,470

1,330

1,210

1,090

962

871

744

663

1,899

1.29

July

224

196

180 ia?

158

149

148

153

177

173

ISO

330

0.23

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

h^t I Discing

May 17

8.32 

8.52 

8.73

2,150 

2,260 

2,390

May 23

12.40 

12.38 

12.34 

12.13 

12.00 

11.86

Mi

11.18 

10.99 

10.69

Ju

9.31 

9.60

5,230 

5,210 

5,170 

4,970 

4,850 

4,730

iy29

4,150 

3,990 

3,770

ne 4

2,770 

2,970

June 10

9.02 

8.93 

8.85 

8.79 

8.72 

8.89

Ju

7.28 

7.53 

7.53

2,560 

2,510 

2,460 

2,420 

2,380 

2,480

ne!6

1,590 

1,720 

1,720

Gage 

height Discharge

May 18

8.91 

8.98 

9.07 

9.06 

9.05 

9.08

2,500 

2,540 

2,600 

2,590 

2,580 

2,610

May 24

11.67 

11.47 

11.32

M

10.41 

10.28 

10.21

Ju

9.69 

9.63 

9.47

Ju

9.14 

9.24 

9.20 

9.12 

9.02 

8.90

4,570 

4,400 

4,270

iy30

3,560 

3,460 

3,410

ne5

3,030 

2,990 

2,880

nell

2,650 

2,720 

2,690 2,630- 

2,560 

2,490

June 17

7.45 

7.35 

7.33

1,680 

1,620 

1,620

Gage 

height Discharge

May 19

9.19 

9.38 

9.53 

9.72 

9.82 

9.83

2,680 

2,820 

2,920 

3,050 

3,120 

3,130

May 25

11.20 

11.06 

11.06

4,170 

4,050 

4,050

May 31

10.08 

9.90 

9.70

Ju

9.30 

9.19

3,310 

3,180 

3,040

ne6

2,760 

2t 680

June 12

8.58 

8.24

2,300 

2,090

June 18

7.27 

7.23 

7.15

1,580 

1,560 

1,520

Gage 

height Discharge

May 20

10.17 

10.00 

9.93 

9.84 

9.75 

9.69

3,380 

3,250 

3,200 

3,140 

3,080 

3,030

May 26

11.42 

12.06 

11.90 

11.64 

11.48 

11.53

Ju

9.45 

9.25

Ju

9.05 

9.00

Ju

8.05 

7.83

Ju

7.10 

7.04 

7.03

4,360 

4,910 

4,760 

4,540 

4,410 

4,450

ne 1

2,860 

2,720

ne7

2,580 

2,550

ne 13

1,980 

1,860

ne!9

1,500 

1,470' 

1,460

Gg&lDfafaq.

May 21

9.64 

9.56 

9.50 

9.58 

10.28 

11.26

3,000 

2,940 

2,900 

2,960 

3,460 

4,220

May 27

11.55 

11.40 

11.37

Ju

9.11 

9.05

Ju

9.16 

9.22 

9.33

Ju

7.65 

7.44

4,470 

4,340 

4,310

ne2

2,630 

2,580

ineS

2,660 

2,700 

2,780

ne!4

1,780 

1,670

June 20

7.15 

7.21 

7.34

1,520 

1,560 

1,620

Gage 

height

M:

12.43 

13.67 

13.28 

12.72 

12.52 

12.44

Ma

11.34 

11.30 

11.26

Ju

9.03 

9.14

Ju

9.31 

9.20 

9.11

Discharge

iy22

5,260 

6,470 

6,080 

5,530 

5,340 

5,270

y28

4,290 

4,260 

4,220

ne3

2,570 

2,650

ne9

2,770 

2,690 

2,630

June 15

7.23 

7.13

Ju

7.58 

7.62 

7.54

1,560 

1,520

ne21

1,740 

1,760 

1,720

Supplemental record.- May 22, 

12.08 ft., 4,930 sec.-ft.

9 a.m., 13.72 ft., 6,520 sec.-ft.; May 26, 9 a.m.,
258 FLOODS OP MAY-JTJME 1948 IN COLUMBIA RIVER BASIN

John Day River at'Service Creek, Oreg.

Location.- Lat. 44°48', long. 120°00', in NE£ sec. 18, T. 9 S., R. 23 E., a quarter of

a mile downstream from Service Creek and three-quarters of a mile southwest of

Service Creek post office. Datum of gage is 1,635.83 feet above mean sea level,

datum of 1929.

Drainage area.- 5,090 square miles. 

Gage-height "record.- Water-stage recorder graph; adjusted for sluggish intake action

7 p.mT June 11 to 5 a.m. June 18, noon June 25 to 7 p.m. June 29, 6 a.m. June 30

to July 8. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

17,100 second-feet and extended to peak stage. Shifting-control method used May 22,

June 10 to July 31. 

Maxima.- May-June 1948: Discharge, 23,900 second-feet noon May 22 (gage height, 15.25

1929 to April 1945: Discharge, 28,900 second-feet Mar. 19, 1932 (gage height, 

16.75 feet), from rating curve extended above 11,000 second-feet. 

Remarks.- Many diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

6,960

6,510

6,120

8,190

7,910

7,910

9,730

10,800

9,810

8,780

June

13,000

12,400

12,200

13,900

13,400

12,200

11,500

11,300

11,400

10,900

July

3,050

2,670

2,430

2,250

2,410

2,770

2,440

2,220

2,010

1,850

Day

11

12

13

14

15

16

17

18

19

20

May

8,060

7,390

7,760

8,440

8,220

8,410

9,480

11,100

13,200

14,500

June

10,300

8,920

8,170

7,230

6,520

6,440

6,380

6,760

7,680

7,090

July

1,670

1,580

1,470

1,350

1,250

1,170

1,100

1,050

1,000

1,000

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...................................................................

Runoff, in inches ...........................................................................................................................

May

13,100

21,400

19,700

17,800

17,100

18,800

19,800

20,600

17,400

14,400

14,300

12,050

2.73

June

7,820

7,580

6,510

5,770

5,120

4,560

4,050

3,680

3,560

3,460

8,327

1.83

July

945

900

828

782

746

710

686

674

706

730

678

1,456

0.33

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

f~, 1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

10.23 

10.70 

10.86

8,970 

10,000 

10,300

May 23

13.95 

13.85 

13.84 

13.73 

13.52 

13.32

M«

13.21 

12.77 

12.30

Ju

10.89 

11.34 

11.99 

12.04 

12.00 

11.79

20,200 

20,000 

19,900 

19,600 

19,000 

18,400

iy29

18,000 

16,800 

15,600

ne 4

12,100 

13,200 

14,900 

15,000 

14,900 

14,400

June 10

10.38 

10.37 

10.37 

10.36 

12.00 

10.60

10,800 

10,800 

10,800 

10,800 

13,400 

10,200

June 16 '

8.56 

8.76 

8.82

6,240 

6,580 

6,690

Gage 

height Discharge

May 18

11.02 

11.37 

11.44

10,700 

11,600 

11,700

May 24

13.16 

13.16 

13.24 

13.14 

12.97 

12.80

17,900 

17,900 

18,100 

17,800 

17,300 

16,900

May 30

11.88 

11.63 

11. SO

Ju

11.46 

11.29 

11.02

14,600 

14,000 

13,600

ne 5

13,600 

13,100 

12,400

June 11

10.58 

10.89 

10.90 

10.61 

10.40 

10.36

10,200 

10,900 

10,900 

10,200 

9,790 

9,490

June 17

8.73 

8.58 

8.40

6,530 

6,280 

5,980

Gage 

height Discharge

May 19

11.66 

12.51 

12.37

12,300 

14,500 

14,100

May 25

12.73 

12.81 

12.98 

13.00 

12.89 

12.86

16,700 

16,900 

17,400 

17,400 

17,100 

17,000

May 31

11.76 

11.96 

12.06 

11.84 

11.52 

11.29

Ju

10.87 

10.92 

10.99 

10.95 

10.86 

10.72

14,300 

14,800 

15,000 

14,500 

13,700 

13,100

ne6

12,108 

12,200 

12,400 

12,300 

12,000 

11,700

June 12

9.96 

9.80

8,840 

8,500

June 18

8.50 

8.65 

8.73 

9.10 

9.28 

9.29

6,140 

6,400 

0,530 

7,200 

7,540 

7,560

Gage 

height Discharge

May 20

12.48 

12.71 

12.78 

12.56 

12.34 

12.11

14,400 

15,000 

15,200 

14,600 

14, COO 

13,400

May 26

12.86 

13.30 

13.70 

13.93 

13.80 

13.47

17,000 

18,000 

19,500 

20,200 

19,800 

18,800

June 1

11.20 

11.27 

11.32 

11.32 

11.20 

11.06

Ju

10.61 

10.59 

10.68 

10.66 

10.58 

10.51

12,900 

13,100 

' 13,200 

13,200 

12,900 

12,600

ne7

11,400 

11,400 

11,600 

11,600 

11,400 

11,200

June 13

9.63 

9.41

8,190 

7,780

June 19

9.30 

9.34 

9.32 

9.39 

9.46 

9.38

7,580 

7,650 

7,610 

7,740 

7,870 

7,720

Gage 

height Discharge

May 21

11.98 

11.91 

11.95 

11.95 

11.95 

12.08

13,100 

12,900 

13,000 

13,000 

13,000 

13,300

May 27

13.35 

13.60 

14.10 

14.18 

13.97 

13.81

18,400 

19,200 

20,700 

20,900 

20,300 

19,800

June 2

10.93 

10.93 

11.07 

11.12 

11.03 

10.88

Ju

10.45 

10.46 

10.57 

10.61 

10.59 

10.75

12,200 

12,200 

12,600 

12 , 700 

12,500 

12,100

me 8

11,000 

11,000 

11,300 

11,400 

11,400 

11,800

June 14

9.10 

8.85

7,200 

6,740

June 20

9.05 

8.89 

8.97

7,110 

6,820 

6,960

Gage 

height Discharge

May 22

14.05 

14.98 

15.25 

15.10 

14.78 

14.28

19,300 

22,600 

23,900 

23,000 

22,300 

21,100

May 28

13.85 

14.30 

14.39 

14.24 

13.88 

13.68

20,000 

21,300 

21,600 

21,100 

20,000 

19,400

June 3

10.74 

10.78 

11.01 

11.05 

10.96 

10.90

11,800 

11,800 

12,400 

12,500 

12,300 

12,200

June 9

10.73 

10.65 

10.62 

10.55 

10.60 

10.44

Ju

8.72 

8.60

11,700 

11,500 

11,400 

11,300 

11,400 

11,000

ne!5

6,510 

6,310

June 21

9.28 

9.68 

9.69

7,540 

8,280 

8,300

Supplemental record.- May 26, 6 p.m., 14.05 ft., 20,600 sec.-ft.; June 10, 10 p.m., 

10.58 ft., 10,200 sec.-ft.; June 11, 10 a.m., 11.02 ft., 11,200 sec.-ft.
JOHN DAY RIVER BASIN 259

John Day River at McDonald Ferry, Oreg.

Location.- Lat. 45°35', long. 120°25'» in NW£ sec. 11, T. 1 N., R. 19 E., at McDonald

Perry, half a mile downstream from Rock Creek and 10 miles east of Klondike. Datum

of gage Is 392.27 feet above mean sea level, datum of 1929. 

Drainage area.- 7,580 square miles. 

Qage-helght record.- Water-stage recorder graph except for period 2 a.m. June 20 to

4 p.mT June 21 for which a graph was drawn based on fragmentary records. 

Discharge record.- Stage-discharge relation defined by current-meter measurements. Gage

heights used to hundredths. 

Maxima.- May-June 1948: Discharge, 23,000 second-feet 2:30 p.m. May 23 (gage height,

9.83 feet).

1904 to April 1948: Discharge, 27,800 second-feet (revised) Feb. 6, 1907 (gage

height, 10.8 feet, from hourly gage readings).

Stage known, 12.8 feet, probably occurred in 1894 (discharge, 39,100 second-feet,

revised, from rating curve extended above 22,000 second-feet by logarithmic

plotting). 

Remarks.- Diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

8,130

7,740

- 6,920

6,810

9,310

8,740

8,800

10,700

11,400

10,400

June

14,600

13,200

12,400

12,400

14,400

13,200

12,000

11,100

10,900

11,800

July

3,740

3,420

3,130

2,890

2,800

3,070

3,170

2,890

2,660

2,450

Day

11

12

13

14

15

16

17

18

49

20

May

9,370

8,680

8,160

8,560

9,120

8,870

9,110

10,300

11,900

14,100

June

12,100

11,800

11,300

9,890

8,290

8,090

8,090

7,660

6,720

8,990

July

2,260

2,080

1,980

1,860

1,730

1,620

1,500

1,410

1,330

1,270

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches ............................................................................................................................

May

15,000

14,100

21,400

19,700

18,000

17,500

20,000

20,800

21,400

17,700

14,800

1.90

June

8,680

9,210

8,590

7,500

6,670

5,990

5,400

4,870

4,430

4,120

9 546

1.41

July

1,220

1,180

1,140

1,060

995

940

870

813

804

795

813

1,867

0.28

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

g&l Discharge

May 17

6.22 

8.29 

6.38 

6.41 

6.41 

6.42

8,740 

8,960 

9,250 

9,340 

9,340 

9,370

May 23

9.07 

9.50 

9.78 

9. SO 

9.64 

9.38

Mi

9.50 

9.62 

9.61 

9.47 

9.31 

9.14

Ju

7.20 

7.32 

7.37 

7.34 

7.30 

7.31

19,600 

21,600 

22,800 

22,900 

22,200 

21,000

y29

21,600 

22,100 

22,000 

21,400 

20,700 

19,900

ne4

12,000 

12,500 

12,600 

12,500 

12,400 

12,400

June 10

7.05 

7.12 

7.66 

7.10 

6.86 

6.72

11,500 

11,700 

13,700 

11,700 

10,800 

10,400

June 16

5.87 

6,15 

6.25 

6.07 

5.84 

5.78

7,680 

8,520 

8,840 

8,280 

7,590 

7,410

GjRl Discharge

May 18

6.45 

6.61 

6.75 

6.83 

6.87 

6.93

Ma

9.23 

9.?0 

9.13 

9.02 

8.88 

8.77

Mi

8.95 

8.80 

3.64 

8.47 

8.32 

8.15

Ju

7.64 

7.98 

8.02 

7.96 

7.85 

7.74

Ju

6.62 

6.74 

7.73 

7.87 

7.34 

7.11

9,470 

9,990 

10,500 

10,700 

10,900 

11,100

y24

20,300 

20,200 

19,900 

19,400 

18,800 

18,300

»y30

19,100 

18,400 

J.7,700 

17,000 

16,400 

15,700

n»5

13,700 

15,000 

15,200 

14,900 

14,500 

14,100

ne 11

10,000 

10,400 

14,000 

14,600 

12,500 

11,700

June 17

5.76 

5.75 

6.32 

6.17 

6.05 

6.06

7,350 

7,320 

9,050 

8,590 

8,22O 

8,250

Gage 

height Discharge

 May 19

7.02 

7.12 

7.21 

7.26 

7.29 

7.32

Me

8.76 

8.80 

8.75 

8.68 

8.58 

8.49

Mi

8.03 

7.93 

7.84 

7.83 

7.85 

7.92

Ju

7.64 

7.58 

7.50 

7.45 

7.37 

7.27

11,400 

11,700 

12,100 

12,200 

12,400 

12,500

iy25

18-, 200 

18,400 

18,200 

17,900 

17,400 

17,100

iy3l

15,200 

14,800 

14,500 

14,400 

14,500 

14,800

ne6

13,700 

13,400 

13,100 

12,900 

12,600 

12,300

June 12

7.38 

7.37 

7.19 

7.02 

6.82 

6.67

12,700 

12,600 

12,000 

11.4QO 

10,700 

10,200

June 18

5.96 

5.87 

5.85 

5.81 

5.77 

5.80

7,950 

7,680 

7,620 

7,500 

7,380 

7,470

GJJSJI Discharge

May 20

7.45 

7.72 

7.88 

7.90 

7.87 

7.93

12,900 

14,000 

14,600 

14,700 

14,600 

14,800

May 26

8.53 

8.62 

8.64 

8.61 

8.63 

8.73

17,200 

17,600 

17,700 

17,500 

17,600 

18,100

June 1

8.03 

8.07 

7.92 

7.78 

7.64 

7.55

15,200 

15,400 

14,800 

14,200 

13,700 

13,300

June 7

7 U 23 

7.25 

7.24 

7.18 

7.09 

7.00

Ju

7.00 

7.35 

7.03 

6.97 

6.73 

6.54

12,100 

12,200 

12,200 

12,000 

11,600 

11,300

ne!3

11,300 

12,600 

11,400 

11,200 

10,400 

9,760

June 19

6.07 

6.20 

6.27 

6.32 

6.34 

6.34

8,280 

8,680 

8,900 

9,050 

9,120 

9,120

a | Discharge

May 21

8.03 

8.12 

8.12 

7.96 

7.83 

7.73

15,200 

15,600 

15,600 

14,900 

14,400 

14,000

May 27

8.84 

9.08 

9.39 

9.42 

9.18 

9.06

18,600 

19,700 

21,100 

21,200 

20,100 

19,600

June 2

7.56 

7.57 

7.55 

7.47 

7.43 

7.33

Ju

6.96 

6.99 

7.01 

6.95 

6.88 

6.80

Ju

6.78 

6.82 

6.62 

6.48 

6.36 

6.26

13,400 

13,400 

13,300 

13,100 

12,900 

12,500

ne8

11,200 

11,300 

11,400 

11,100 

10,900 

30,600

me 14

10,600 

10,700 

10,000 

9,570 

9,180 

8,870

June 20

Gage 

height Discharge

May 22

7.66 

7.65 

7.65 

7.66 

7.78 

8.54

13,700 

13,700 

13,700 

13,700 

14,200 

17,300

May 28

9.14 

9.37 

9.48 

9.45 

9.34 

9.32

19,900 

21,000 21,500' 

21,300 

20,800 

20,700

June 3

7.30 

7.33 

7.36 

7.35 

7.27 

7.19

Ju

6.77 

6.85 

6.92 

6.92 

6.98 

7.04

12,400 

12,500 

12,600 

12,600 

12,300 

12,000

ne9

10,500 

10,800 

11,000 

11,000 

11,200 

11,500

June 15

6.17 

6.10 

6.06 

6.G2 

5.99 

5.92

Ju

6.15 

6.16

8,590 

8,370 

8,250 

8,130 

8,040 

7,830

ne21

8,526 

8,560

Supplemental record1.- May 23, 2:30 p.m., 9.83 ft., 23,000 sec.-ft.; May 27, 2 p.m., 

9.47 ft., 21,400 sec.-ft.j May 28, 1 p.m., 9.48 ft., 21,500 sec.-ft.; May 29, 10 a.m., 

9.64 ft., 22,200 sec.-ft.j June 10, 11 a.m., 7.75 ft., 14,100 sec.-ft.} June 11, 3 p.m. 

7.99 ft., 15,100 sec.-ft.j June 12, 5 a.m., 7.48 ft., 13,100 sec.-ft.j June 13, 6 a.m., 

7.68 ft., 13,800 sec.-ft.j,June 16, 11:30 a.m., 6.25 ft., 8,840 sec.-ft.; June 17, 

2 p.m., 6.35 ft., 9,150 sec.-ft.
260 FLOODS 07 MAT-JOKE 1948 IK COLUMBIA RIVER BASIN

Strawberry Creek above Slide Creek, near Prairie City, Oreg.

Location.- Lat. 44°20', long. 118°39', In SW£ sec. 20, T. 14 S., R. 34 E., 100 feet upstream from Slide Creek and 8^ miles south of Prairie City.

Drainage area.- 7.2 square miles.

Page-height record.- Water-stage recorder graph except for period July 14-31, when 

there was no gage-height record. *

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Shifting-control method used May 27 to June 9. Discharge for period of no gageheight record computed on basis of records for other stations In John Day River 

Basin.

Maxima.- May-June 1948: Discharge, 172 second-feet 5 a.m. June 8 (gage height, 2.23

1930 to April 1948: Discharge, 150 second-feet June 9, 1933 (gage height, 2,44 

feet), from rating curve extended above 85 second-feet. 

Remarks.- Ho diversion above station.

Mean discharge, in secondDay

1

2

3

4

5

6

7

8

9

10

May

10

10

12

14

15

17

22

20

19

17

June

106

116

132

138

136

140

136

159

147

122

July

52

49

45

42

39

37

35

33

31

29

Day

11

12

18

14

15

16

17

18

19

ao

May

17

16

17

18

19

25

32

32

30

31

June

108

92

89

86

84

82

79

74

72

76

feet, 1948

July

27

25

23

22

20

19

17

16

15

14

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................. _ , _ . __

Runoff, in inches ........... ,

May

35

44

46

49

57

68

103

147

129

117

108

41.8

6.69

June

85

89

83

76

72

68

62

59

56

53

95.9

14.86

July

14

13

12

11

10

10

11

11

11

10

9.8

23.0

3.68

Gage height, in feet, and discharge, in seeond-feet, at indicated time, 1948

a

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

1.64 

1.65

M

1.78 

1.80

M

2.12 

2.08 

2.07

Jl

2.00 

2.03 

2.06 

2.06 

2.10 

2.07

32 

32

»y23

45

47

iy29

131 

124 

122

ne4

129 

134 

140 

140 

147 

142

June 10

1.87 

1.82 

1.84

Ju

1.63 

1.62

124 

115 

118

ne!6

83 

81

Gage 

height Discharge

May 18

1.64

1.63

32

31

May 24

1.80 

1.86

M

2.05 

2.03 

2.02

Ju

2.05 

2.02 

2.04 

2.05 

2.04 

2.00

Ju

1.79 

1.78 

1.73

47

54

iy30

118 

115 

113

ne5

138 

133 

136 

138 

136 

129

me 11

109 

108 

99

June 17

1.61 

1.58

80 

75

Gage 

height Discharge

May 19

1.62 

1.63

30 

31

May 25

1.89 

1.92

Me

1.99 

1.99 

1.97

Ju

2.07 

2.08 

2.07 

2.07 

2.05 

2.08

Ju

1.69 

1.68 

1.67

Ju

1.57 

1.56

57

60

iy31

108 

108 

104

ne6

142 

143 

142 

142 

138 

143

ne!2

92 

91 

89

ne!8

74 

72

Oj&l Discharge

May 20

1.63 

1.65

Mi

1.98 

2.06

Ju

1.97 

1.99 

2.00

Ju

1.98 

2.00 

2.01 

2.05 

2.05 

2.19

Ju

1.66 

1.68 

1.66

Ju

1.56 

1.56

31 

32

iy26 »

68 

78

me 1

104 

108 

109

ne7

125 

129 

131 

138 

138 

164

ne!3

88 

91 

88

ne!9

72 

72

^(Discharge

May 21

1.67 

1.73

34 

40

May 27

2.08 

2.10 

2.19 

2.23 

2.23 

2.22

Ju

2.01

2.06 

2.09

Ju

2.20 

2.12 

2.19 

2.17 

2.12 

2.10

81 

88 

107 

118 

124 

127

ne2

111 

120 

125

ne8

166 

151 

164 

160 

151 

147

June 14

1.64 

1.65

84 

86

June 20

1.59 

1.61

76 

80

height

M

1.78 

1.80

Discharge

iy22

45 

47

May 28

2.20 

2.28 

2.28 

2.32 

2.20 

2.17

Ju

2.12 

2.15 

2.14

Ju

2.10 

2.07 

2.12 

2.14 

2.08 

2.00

129 

149 

155 

168 

145 

140

ne3

131 

136 

134

me 9

147 

142 

151 

155 

147 

133

June 15

1.63 

1.63

83

83

June 21

1.64 

1.68

84 

91

Supplemental record.- May 28, 

ft., 172 sec.-ft.

3 p.m., 2.33 ft., 170 sec.-ft.; June 8, 5 a.m., 2.23
JOHN DAY RIVER BASIN 261

North Pork John Day River near Dale, Oreg.

Location.- Lat. 45°00', J.ong. 118°57', in SE£ sec. 35, T. 6 S., R. 31 E., three-eighths 

of a mile downstream from Desolation Creek and l£ miles northeast of Dale. Datum of 

gage is 2,775.85 feet above mean sea level, datum of 1929.

Drainage area.- 525 square miles.

gage-height record.- Water-stage recorder graph.

DiScharge record.- Stage-discharge relation defined by current-meter measurements below 

6,OOo second-feet and extended to peak stage.

Maxima.- May-June 1948: Discharge, 8,170 second-feet 11 p.m. May 26 (gage height, 10.48

1929 to April 1948: Discharge, 4,990 second-feet May 14, 1932 (gage height, 8.4 

feet).

Remarks.- Several small diversions above station for irrigation and mining.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

978

882

936

1,120

1,060

1,400

2,250

2,030

1,720

1,530

June

4,100

4,410

4,780

5,430

4,420

4,280

4,050

4,280

3,750

3,390

July

780

700

645

615

670

595

580

520

480

439

Day

11

12

13

14

15

16

17

18

19

20

May

1,400

1,350

1,790

1,990

2,140

2,680

3,340

3,120

3,090

3,280

June

2,890

2,500

2,270

2,020

,1,870

1,760

1,580

1,690

2,050

1,890

July

426

396

359

336

313

292

278

278

271

271

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ...................... ..........................................................

Runoff, in inches .. .. . ... ... . .......... ............

May

3,660

4,770

4,850

5,080

5,750

6,540

7,390

6,680

5,040

4,190

4,080

3,101

6.81

June

2,360

2,010

1,770

1,570

1,400

1,250

1,120

1,010

930

852

2,589

5.50

July

252

236

221

212

201

192

190

224

215

195

179

373

0.82

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

7.24 

7.22 

7.18 

7.14 

7.17 

7.23

ME

8.39 

8.26 

8.12 

8.11 

8.50 

8.70

Mi

8.80 

8.58 

8.38 

8.27 

8.22 

8.16

Ju

9.29 

8.91 

8.62 

8.40 

8.29 

8.28

3,400 

3,370 

3,330 

3,280 

3,310 

3,390

iy23

4,930 

4,740 

4,550 

4,530 

5,080 

5,370

»y29

5,520 

5,190 

4,910 

4,760 

4,690 

4,600

ne4

6,260 

5,680 

5,250 

4,940 

4,790 

4,770

June 10

7.54 

7.31 

7.14 

6.99 

7.02 

7.07

Ju

5.73 

5.61 

5.58

3,770 

3,480 

3,280 

3,100 

3,130 

3,190

ne!6

1,820 

1,710 

1,680

Gage 

height Discharge

May 18

7.18 

7.05 

6.94 

6.86 

6.88 

6.97

3,330 

3,170 

3,040 

2,960 

2,980 

3,080

May 24

8.57 

8.40 

8.24 

8.24 

8.68 

8.95

M

8.02 

7.87 

7.73 

7.63 

7.82 

8.01

Ju

8.17 

8.04 

7.91 

7.83 

7.97 

8.18

5,180 

4,940 

4,720 

4,720 

5,340 

5,740

iy30

4,410 

4,200 

4,020 

3,890 

4,140 

4,390

ne 5

4,620 

4,440 

4,250 

4,150 

4,340 

4,630

June 11

7.02 

6.88 

6.76 

6.65 

6.64 

6.65

3,130 

2,980 

2,850 

2,720 

2,710 

2,720

June 17

5.48 

5.38 

5.42

Supplemental record.

10.48 ft., 8,176 sec.-

1,600 

1,520 

1,560

Gage 

height Discharge

May 19

6.88 

6.83 

6.80 

6.95 

7.25 

7.31

2,980 

2,920 

2,890 

3,060 

3,410 

3,480,

May 25 .

8.91 

8.80 

8.68 

8.75 

9.40 

9.43

Mi

7.93 

7.80 

7.67 

7.61 

7.72 

7.88

Ju

8.09 

7.93 

7.81 

7.69 

7.88 

8.09

5,680 

5,520 

5,340 

5,440 

6,420 

6,470

iy31

4,280 

4,110 

3,940 

3,860 

4,010 

4,210

ne6

4,510 

4,280 

4,120 

3,970 

4,210 

4,510

June 12

6.60 

6.49 

6.40 

6.32 

6.32 

6.39

2,670 

2,560 

2,460 

2,380 

2,380 

2,450

June 18

5.50 

5.50 

5.54 

5.58 

5.66 

5.97

1,620 

1,620 

1,650 

1,680 

1,750 

2,030

Gage 

height Discharge

May 20

7.21 

7.08 

6.96 

6.98 

7.23 

7.41

3,360 

3,210 

3,070 

3,090 

3,390 

3,600

May 26

9.33 

9.16 

9.00 

9.18 

10.07 

10.40

Ju

7.93 

7.81 

7.68 

7.59 

7.76 

8.04

Ju

7.95 

7.78 

7.63 

7.54 

7.67 

7.84

Ju

6.25 

6.11 

6.14

6,320 

6,060 

5,820 

6,090 

7,490 

8,030

me 1

4,280 

4,120 

3,950 

3,840 

4,060 

4,440

ne 7

4,310 

4,080 

3,890 

3,770 

3,940 

4,160

ne 13

2,310 

2,170 

2,200

June 19

6.21 

6.20 

6.00 

5.85 

5.78 

5.77

2,270 

2,260 

2,060 

1,920 

1,860 

1,850

Gage 

height

Mi

7.36 

7.27 

7.19 

7.33 

7.78 

8.14

Discharge

iy21

3,540 

3,430 

3,340 

3,510 

4,080 

4,580

May 27

10.14 

9.93 

9.70 

9.80 

10.13 

10.25

Ju

8.20 

8.06 

7.90 

7.78 

8.00 

8.30

Ju

7.80 

7.89 

8.11 

7.95 

7.96 

7.88

Ju

6.00 

5.84 

5.90

7,600 

7,270 

6,900 

7,060 

7,590 

7,780

ne2

4,660 

4,460 

4,240 

4,080 

4,380 

4,800

ne8

4,110 

4,230 

4,530 

4,310 

4,320 

4,210

ne!4

2,060 

1,920 

1,970

June 20

5.73 

5.67 

5.65 

5.77 

6.00 

6.28

.1,820 

1,760 

1,740 

1,850 

2,060 

2,340

Gage 

height

Mi

8.22 

8.20 

8.16 

8.16 

8.49 

8.54

Ma

9.99 

9.76 

9.52 

9.31 

9.14 

8.98

Ju

8.29 

8.14 

7.97 

7.86 

8.54 

9.46

Ju

7.69 

7.50 

'7.36 

7.29 

7.48 

7.72

Discharge

iy22

4,690 

4,660 

4,600 

4,600 

5,070 

5,140

y28

7,360 

7,000 

6,610 

6,280 

6,030 

5,790

ne3

4,790 

4,580 

4,340 

4,190 

5,140 

6,520

ne9

3,970 

3,720 

3,540 

3,460 

3,690 

4,010

June 15

5.80 

5.73 

5.77

Ju

6.43 

6.26 

6.11

1,880 

1,820 

1,850

ne21

2,490 

2,320 

2,170

- May 22, 3 a.m., 8.38 ft., 4,910 sec. -ft.; May 26, 11 p.m., 

ft.; June 4, 10 a.m., 9.47 ft., 6,530 sec. -ft.
262 FLOODS OF MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

North Fork John Day River at Monument, Oreg.

Location.- Lat. 44°49", long. 119°26', in E| sec. 1, T. 9 S., R. 27 E., Just downstream 

from entrance to canyon, three-quarters of a mile west of Monument.

Drainage area.- 2,520 square miles.

Gage-height Tecord.- Water-stage recorder graph except for periods 8 p.m. May 29 to 

8 p.m7 May 30 and July 8-31, for which there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

12,000 second-feet and extended to peak stage. Discharge for periods of no gageheight record computed on basis of reconstructed gage-height graph or records for 

station near Dale and Middle Fork John Day River at Ritter.

Maxima.- May-June 1948: Discharge, 21,100 second-feet 3 a.m. May 22 (gage height, 14.67

1925 to April 1948: Discharge, 22,000 second-feet Mar. 18, 1932 (gage height, 

14.8 feet), from rating curve extended above 9,000 second-feet. 

Remarks.- Many small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

4,670

4,070

4,130

6,020

5,170

5,430

7,390

7,380

6,620

6,110

June

8,250

8,080

8,040

10,300

8,740

7,950

7,400

7,320

7,000

6,390

July

1,690

1,540

1,420

1,330

1,440

1,560

1,300

1,200

1,100

1,000

Day

11

12

18

14

15

16

17

1«

1920

May

5,600

5,170

6,060

6,340

6,070

6,480

7,470

8,300

10,300

10,400

June

6,270

5,130

4,830

4,320

3,970

4,200

3,960

4,180

4,740

4,240

July

960

880

800

740

680

640

620

620

600

580

Day

21

22

23

24

25

26

27

28

29

HO

31

Runoff, in inches ............................................................................................................................

May

10,700

17,200

13,600

12,600

12,600

14,100

16,300

16,600

11,900

8,900

8,920

8,794

4.02

June

5,310

4,610

3,950

3,460

3,020

2,690

2,400

2,200

1,990

1,880

5,227

2.31

July

540

500

480

460

440

430

420

450

470

440

400

830

0.38

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

8.50 

8.72 

8.77 

8.78 

8.79 

8.80

7,160 

7,560 

7,650 

7,660 

7,680 

7,700

May 23

12.23 

12.03 

11.71 

11.43 

11.23 

11.31

Mi

11.22 

10.60 

10.00

14,800 

14,300 

13,600 

13,000 

12,500 

12,700

iy29

12,500 

11,200 

9,950

June 4

10.15 

10.64 

10.51 

10.38 

10.07 

9.77

10,200 

11,200 

11,000 

10,700 

10,100 

9,500

June 10

8.13 

8.31 

8.12 

7.88 

7.79 

8.15

Ju

6.57 

6.63 

6.73 

6.70 

6.82 

6.66

6,530 

6,840 

6,510 

6,110 

5,950 

6,560

ne!6

4,060 

4,140 

4,300 

4,250 

4,430 

4,190

Gage 

height Discharge

May 18

8.92 

9.12 

9.22 

9.20 

9.25 

9.35

7,920 

8,280 

8,460 

8,420 

8,520 

8,700

May 24

11.63 

11.54 

11.32 

11.05 

10.88 

11.13

13,400 

13,200 

12,700 

12,100 

11,700 

12,300

May 30

9.73 

9.52 

9.35 

9.24 

9.18 

9.36

Ju

9.50 

9.25 

8.94

Ju

8.30 

8.22 

8.00 

7.83 

7.66 

7.49

9,430 

9,030 

8,700 

8,500 

8,380 

8,720

ne 5

8,990 

8,520 

7,950

nell

6,820 

6,680 

6,310 

6,020 

5,750 

5,470

June 17

6.58 

6.54 

6.48 

6.39 

6.50 

6.46

4,070 

4,010 

3,920 

3,790 

3,950 

3,890

G.'ge 

height Discharge

May 19

10.00 

10.52 

10.37 

10.07 

10.13 

10.66

9,950 

11,000 

10,700 

10,100 

10,200 

11,300

May 25

11.43 

11.48 

11.34 

11.16 

11.02 

11.31

M<

9.88 

9.33 

9.00

13,000 

13,100 

12,800 

12,400 

12,000 

12,700

iy31

9,710 

8,670 

8,060

June 6

9.17 

8.89 

8.58

8,370 

7,860 

7,300

June 12

7.37 

7.19 

7.05

5,280 

4,990 

4,780

June 18

6.47 

6.50 

6.70 

6.78 

6.81 

6.86

3,900 

3,950 

4,250 

4,370 

4,420 

4,490

Gage 

height Discharge

May 20

10.79 

10.52 

10.25 

9.93 

9.70 

9.62

11,600 

11,000 

10,400 

9,810 

9,370 

9,220

May 26

12.10 

12.43 

12.14 

11.82 

11.56 

11.88

Ju

9.36 

9.07 

8.76

14,500 

15,300 

14,600 

13,800 

13,300 

14,000

ne 1

8,720 

8,190 

7,630

June 7

8.86 

8.61 

8.28

7,810 

7,360 

6,790

June 13

7.26 

7.03 

6.87

5,110 

4,740 

4,500

June 19

6.86 

7.10 

7.20 

7.16 

6.98 

6.82

4,490 

4,950 

5,010 

4,950 

4,670 

4,430

Gage 

height Discharge

May 21

9.73 

9.74 

9.64 

9.60 

12.47 

13.41

9,430 

9,450 

9,260 

9,180 

15,400 

17,800

May 27

13.10 

13.20 

12.95 

12.60 

12.40 

13.66

17,000 

17,200 

16,600 

15,700 

15,200 

18,400

June 2

9.20 

9.08 

8.74

Ju

8.34 

8.58 

8.58 

8.68 

8.86 

8.70

8,420 

8,200 

7,590

ne8

6,890 

7,300 

7,300 

7,480 

7,810 

7,520

June 14

6.83 

6.72 

6.55

4,440 

4,280 

4,010

June 20

6.60 

6.58 

6.96

4,100 

4,070 

4,640

Gage 

height Discharge

May 22

14.56 

13.73 

13.03 

12.54 

12.15 

12.07

20,800 

18,600 

16,800 

15,600 

14,600 

14,400

May 28

13.72 

13.52 

12.90 

12.60 

12.22 

11.82

18,600 

18,100 

16,500 

15,700 

14,800 

13,800

June 3

9.20 

9.00 

8.80

Ju

8.62 

8.25 

7.97

8,420 

8,060 

7,700

ne9

7,380 

6,740 

6,260

June 15

6.54 

6.50 

6.47

4,010 

3,950 

3,900

June 21

7.50 

7.54 

7.27

5,490 

5,550 

5,120

Supplemental record.- May 21, 6 p.m., 9.72 ft., 9,410 sec.-ft., 10 p.m., 12.51 ft., 

15,500 sec.-ft.5 May 22, 3 a.m., 14.67 ft., 21,100 sec.-ft.; May 28, 2 a.m., 13.52 ft., 

18,100 sec.-ft.
JOHN DAY RIVER BASIN ' 263

Camas Creek near Ukiah, Oreg.

Location.- Lat. 45°09', long. 118°49', in SE£ sec. 3, T. 5 S., R. 32 E., 1.2 miles upstream from Cable Creek and 6 miles east of Ukiah. 

Drainage area.- 121 square miles. 

Page-height record.- Water-stage recorder graph except for period of faulty intake

action, 12 p.m. May 26 to 2 p.m. June 4, for which discharge was computed on basis of

records for other stations in John Day River Basin. 

Discharge record.- Stage-discharge relation defined by current-meter measurements below

810 secona-feet and extended to peak stage by logarithmic plotting. 

Maxima.- May-June 1948: Discharge, 1,090 second-feet 6 a.m. May 13 (gage height, 3.68

1914-17, 1919-24, 1932 to April 1948: Discharge, 2,350 second-feet Dec. 12, 1946 

(gage height, 4.58 feet). 

Remarks.- Small diversions above station for irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

419

348

391

512

461

572

852

763

702

718

June

480

440

480

538

405

354

311

268

234

219

July

51

44

40

37

57

45

41

34

29

26

Day

11

12

13

14

15

16

17

18

19

20

May

710

665

992

844

725

732

771

730

846

746

June

188

166

164

150

134

128

118

120

136

141

July

24

22

20

18

16

15

14

14

14

14

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet.... ....................... ......... .. .....................................

Runoff, in inches ............................................................................................................................

May

710

786

773

738

764

816

886

779

600

480

460

6.54

June

173

167

155

135

118

105

93

80

68

61

1.95

July

12

12

11

10

10

9.5

9.1

11

10

9.1

8.4

0.21

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

K

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

3.34 

3.31 

3.28

787 

763 

740

May 23

3.33 

3.29 

3.32

M:

Ju

2.97 

2.88

779 

748 

771

»y29

ne4

518 

461

June 10

2.39 

2.34

220 

202

June 16

2.06 

2.11 

2.08

123 

135 

127

Gage 

height Discharge

May 18

3.29 

3.24 

3.22 

3.21 

3.26 

3.47

748 

710 

695 

688 

725 

894

May 24

3.28 

3.24 

3.30

M:

Ju

2.80 

2.75 

2.72

740 

710 

755

»y30

ne 5

413 

386 

369

June 11

2.30 

2.25

188 

173

June 17

2.05 

2.02 

2.01

120 

114 

111

Gage 

height Discharge

May 19

3.49 

3.42 

3.39 

3.38 

3.38 

3.36

912 

852 

827 

819 

819 

803

May 25

3.30 

3.30 

3.37

Ms

755 

755 

811

iy31

June 6

2.70 

2.65

358 

333

June 12

2.22 

2.20 

2.28

164 

158 

182

June 18

2.02 

2.07 

2.09

114 

125 

130

Gage 

height Discharge

May 20

3.29 

3.26 

3.26

748 

725 

725

May 26

3.37 

3.31 

3.52

Ju

811 

763 

938

ne 1

June 7

2.61 

2.55

313 

286

June 13

2.22 

2.18 

2.23

164 

153 

167

June 19

2.14 

2.12 

2.08

142 

137 

127

Gage 

height Discharge

May 21

3.22 

3.21 

3.32

695 

688 

771

May 27

Ju

Ju

2.51 

2.47

ne2

ne8

268 

251

June 14

2.18 

2.15 

2.12

153 

145 

137

June 20

2.09 

2.26

130 

176

Gage 

height

M:

3.33 

3.34 

3.37

Ma

Ju

Ju

2.43 

2.40 

2.43

Ju

2.12 

2.10 

2.08

Discharge

»y22

779 

787 

811

y28

ne3

ne9

235 

223 

235

ne!5

137 

 132 

127

June 21

2.25 

2.24

173 

170

824933 0-49-19
264 FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Middle Fork John Day River at Ritter, Oreg.

Location.- Lat. 44°55', long, 119°08', In NW^- sec. 8, T. 83., R. 50 E., at bridge half

a mile south of Ritter. 

Drainage area.- 526 square miles. 

Gage-height reco,cd.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 2,500 second-feet 4: a.m. May 28 (gage height, 6.57

1929 to April 1948: Discharge, 4,000' second-feet Mar. 19, 1952 (gage height, 7.78 

feet). 

Remarks.- Several small diversions above station for Irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

840

750

725

955

889

970

1,580

1,440

1,520

1,200

June

1,550

1,490

1,550

1,840

1,770

1,710

1,660

1,670

1,590

1,490

July

520

287

264

250

270

260

247

225

206

188

Day

11

12

13

14

15

16

17

18

19

20

May

1,040

948

1,050

1,070

1,040

1,120

1,250

1,250

1,410

1,580

June

1,550

1,150

1,050

954

860

856

769

740

804

776

July

182

175

158

147

158

150

122

118

117

115

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................... ....................................

Runoff, in inches ..................................... .. ...................................................................................

May

1,540

2,000

2,050

1,960

2,000

2,160

2,570

2,580

2,020

1,690

1,620

1,417

5.11

June

1,190

948

794

694

612

546

490

458

589

355

1,066

2.26

July

109

102

94

91

86

85

84

88

91

84

76

158

0.55

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

K

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

5.15 

5.12 

5.12

1,250 

1,240 

1,240

May 23

6.01 

5.99 

5.94 

5.89 

5.87 

5.89

Mi

6.11 

6.05 

5.90 

5.82 

5.74 

5.71

Ju

5.85 

5.78 

5.72

2,100 

2,080 

2,050 

1,980 

1,960 

1,980

*y 29

2,210 

2,120 

1,990 

1,910 

1,850 

1,800

ne4

1,920 

1,870 

1,810

June 10

5.39 

5.25 

5.40

Ju

4.64 

4.64 

4.56

1,480 

1,560 

1,490

ne!6

868 

868 

814

Gage 

height Discharge

May 18

5.15 

5.08 

5.09

MJ

5.90 

5.90 

5.88 

5.84 

5.85 

5.89

M

5.66 

5.65 

5.58 

5.54 

5.55 

5.60

Ju

5.71 

5.63 

5.66

Ju

5.26 

5.15 

5.11

1,260 

1,200 

1,210

iy24

1,990 

1,990 

1,970 

1,950 

1,920 

1,980

*y30

1,750 

1,720 

1,670 

1,650 

1,640 

1,690

ne5

1,800 

1,720 

1,750

nell

1,560 

1,260 

1,230

June 17

4.52 

4.46 

4.42

788 

750 

725

Gage 

height Discharge

May 19

5.54 

5.54 

5.29 

5.26 

5.28 

5.59

1,440 

1,440 

1,590 

1,560 

1,580 

1,680

May 25

5.89 

5.90 

5.92 

5.90 

5.91 

6.02

Ms

5.59 

5.55 

5.55 

5.45 

5.54 

5.46

Jv

5.66 

5.58 

5.59

1,980 

1,990 

2,010 

1,990 

2,000 

2,110

iy31

1,680 

1,640 

1,620 

1,520 

1,650 

1,550

ne6

1,750 

1,670 

1,680

June 12

5.02 

4.95 

4.95

Ju

4.45 

4.46 

4.47

1,160 

1,080 

1,080

ne!8

751 

750 

756

Gage 

height Discharge

May 20

5.57 

5.56 

5.49 

5.46 

5.58 

5.56

1,660 

1,650 

1,580 

1,550 

1,470 

1,450

May 26

6.01 

6.04 

6.05 

6.06 

6.08 

6.27

2,100 

2,150 

2,120 

2,160 

2,180 

2,590

June 1

5.49 

5.51 

5.45 

5.40 

5.56 

5.41

1,580 

1,600 

1,540 

1,490 

1,450 

1,500

June 7

5.59 

5.55 

5.56

1,680 

1,620 

1,650

June 13

4.89 

4.82 

4.79J

1,050 

1,000 

978

June 19

4.66 

4.51 

4.44

882 

782 

757

Gage 

height Discharge

May 21

5.57 

5.57 

5.57 

5.70 

5.51 

5.71

1,460 

1,460 

1,460 

1,790 

1,600 

1,800

May 27

6.28 

6.28 

6.24 

6.17 

6.27 

6.55

Ju

5.44 

5.45 

5.59 

5.54 

5.54 

5.42

Ju

5.57 

5.59 

5.58

Ju

4.76 

4.71 

4.66

Ju

4.42 

4.40 

4.59 

4.45 

4.65 

4.95

2,400 

2,400 

2,550 

2,280 

2,590 

2,450

me 2

1,550 

1,520 

1,480 

1,440 

1,440 

1,510

ne8

1,660 

1,680 

1,670

ne 14

955 

918 

882

ne20

725 

712 

706 

751 

861 

1,100

Gage 

height

M

5.86 

5.88 

5.94 

5.96 

5.96 

6.01

Discharge

iy22

1,950 

1,970 

2,050 

2,050 

2,050 

2,100

May 28

6.57 

6.32 

6.26 

6.21 

6.20 

6.16

2,500 

2,440 

2,580 

2,520 

2,510 

2,270

June3

5.48 

5.46 

5.42 

5.59 

5.40 

5.56

Ji

5.56 

5.45 

5.42

1,570 

1,550 

1,510 

1,480 

1,490 

1,650

me 9

1,650 

1,520 

1,510

June 15

4.65 

4.60 

4.61

875 

840 

847

June 21

5.01 

5.09 

5.24 

5.10 

4.98 

4.88

1,150 

1,210 

1,550 

1,220 

1,120 

1,040

Supplemental record.- May 21, 

1,560 sec.-ft.; June 10, 9 p.m.

5 p.m., 5.40 

, 5.60 ft., I,

ft.,.1,490 sec 

690 sec.-ft.

,-ft., 6 p.m., 5.47 ft.,
JOHN DAY RIVER BASIN 265

Pox Creek at gorge, near Pox, Oreg. 

(The lower part of this stream Is named Cottonwood Creek)

Location.- Lat. 44°37', long. 119°16', In NW£ sec. 17, I. 11 S., R. 29 E., at head of 

gorge, 6 miles southwest of Pox.

Drainage area.- 92 square miles.

Page-height "record.- Water-stage recorder graph except for period 2 a.m. June 16 to 

noon June 19, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current meter measurements 

below 320 second-feet and extended to peak stage on basis of slope-area measurement. Discharge for period of no gage-height record computed on basis of records 

for other stations In John Day River Basin.

Maxima.- May-June 1948: Discharge, 1,850 second-feet a.m. May 22 (gage height, 5.84 

feet), by s'lope-area method.

1930 to April 1948: Discharge, 800 second-feet Mar. 18, 1932, from rating curve 

extended above 250 second-feet; gage height observed, 5.37 feet Feb. 21, 1943 

(affected by ice).

Remarks.- Several diversions above station for Irrigation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

176

134

132

223

161

179

272

278

218

181

June

226

153

122

222

213

131

100

- 174

205

153

July

35

28

26

24

32

35

34

28

24

21

Day

11

18

13

14

15

16

17

18

19

SO

May

154

142

161

167

163

167

196

318

686

532

June

215

148

104

96

84

120

100

135

340

240

July

18

16

14

12

11

9.8

8.8

8.4

7.7

7.4

Day

21

W,

23

24

25

26

27

28

W

30

31

Monthly mean discharge, in second-feet........................... ....................................... __ ...

Runoff, in inches............................................................................................................................

May

648

1,090

422

324

287

390

312

362

250

205

225

295

3.70

June

217

170

125

100

83

70

60

51

41

40

141

1.71

July

6.8

6.5

5.8

5.5

5.5

5.2

5.0

4.0

3.6

3.8

4.0

14.7

0.18

Gage height, in feet, and discharge, in second-feet, at indicated time, 1948

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

Gage 

height Discharge

May 17

2.39 

2.44 

2.50 

2.53 

2.57 

2.61

Ms

3.38 

3.31 

3.23 

3.15 

3.06 

3.01

M<

2.79 

2.74 

2.70 

2.65 

2.62 

2.57

Ju

2.40 

2.57 

2.65 

2.70 

2.71 

2.71

172 

184 

198 

206 

216 

226

y23

477 

449 

420 

392 

361 

344

y29

275 

261 

250 

236 

228 

216

ne4

174 

216 

236 

250 

253 

253

June 10

2.24 

2.20 

2.17 

2.13 

2.43 

2.85

140 

132 

127 

119 

181 

293

June 16

2.11 116

Gage 

height Discharge

May 18

2.70 

2.78 

2.86 

2.94 

3.11 

3.58

250 

272 

296 

321 

378 

557

May 24

3.00 

3.O1 

2.99 

2.92 

2.86 

2.81

340 

344 

337 

314 

296 

281

May 30

2.52 

2.49 

2.47 

2.43 

2.59 

2.75

Ju

2.71 

2.65 

2.58 

2.49 

2.39 

2.32

203 

196 

191 

181 

220 

264

ne5

253 

236 

218 

196 

172 

156

June 11

2.73 

2.54 

2.49 

2.47 

2.45 

2.43

258 

208 

196 

191 

186 

181

June 17

Supplemental record.

2.71 ft., 253 sec .-ft.;

Gage 

height Discharge

May 19

3.71 

3.76 

4.11 

4.01 

3.91 

3.77

614 

637 

805 

755 

705 

642

May 25

2.81 

2.83 

2.82 

2.79 

2.78 

3.07

281 

287 

284 

275 

272 

364

May 31

2.68 

2.65 

2.62 

2.57 

2.50 

2.48

Ju

2.27 

2.23 

2.20 

2.15 

2.11 

2.07

Ju

2.40 

2.35 

2.29 

2.21 

2.14 

2.10

245 

236 

228 

216 

198 

193

ne6

146 

138 

132 

123 

116 

109

ne!2

174 

163 

150 

134 

121 

114

June 18

GgSj| Discharge

May 20

3.69 

3.74 

3,56 

3.37 

3.23 

3.13

606 

628 

549 

473 

420 

386

May 26

3.35 

3.35 

3.19 

3.03 

2.94 

2.86

465 

465 

406 

350 

321 

296

June 1

2.58 

2.65 

2.72 

2.66 

2.57 

2.47

Ju

2.05 

2.03 

1.02 

1.99 

1.96 

1.97

Ju

2.07 

2.04 

2.03 

2.02 

2.02 

2.04

218 

236 

256 

239 

216 

191

ne?

106 

103 

101 

96 

92 

94

ne!3

109 

104 

103 

101 

101 

104

June 19

3.12 

3.18 

3.10 

2.97

382 

403 

375 

330

Gage 

height Discharge

May 21

3.07 

3.06 

3.05 

3.67 

4.83 

5.57

364 

361 

358 

596 

1,190 

1,650

May 27

2.83 

2.82 

2.81 

2.76 

2.94 

3.71

Ju

2.40 

2.34 

2.30 

2.25 

2.19 

2.16

Ju

2.06 

2.28 

2.39 

2.52 

2.66 

2.73

287 

284 

281 

267 

321 

614

ne2

174 

161 

152 

142 

130 

125

neS

108 

148 

172 

203 

239 

258

June 14

2.04 

2.02 

2.00 

1.97 

1.93 

1.91

104 

101 

98 

94 

88 

84

June 20

2.81 

2.66 

2.60 

2.53 

2.55 

2.63

281 

239 

223 

206 

210 

231

Gage 

height Discharge

May 22

5.68 

4.99 

4.49 

4.02 

3.67 

3.48

1,730 

1,280 

995 

760 

596 

517

May 28

3.27 

3.02 

2.97 

2.93 

2.86 

2.82

Ju

2.13 

2.11 

2.10 

2.11 

2.20 

2.29

Ju

2.71 

2.62 

2.53 

2.41 

2.33 

2.28

434 

347 

330 

318 

296 

284

ne3

119 

116 

114 

116 

132 

150

ne9

253 

228 

206 

176 

159 

148

June 15

1.90 

1.88 

1.87 

1.87 

1.91 

2.06

83

80 

79 

79 

84 

108

June 21

2.64 

2.60 

2.57 

2.55 

2.53 

2.51

234 

223 

216 

210 

206 

200

- May 22, 2 a.m., 5.84 ft., 1,850 sec. -ft.; May 27, 6:30 p.m., 

June 9, 2 a.m., 2.74 ft., 261 see. -ft.; June 11, 1 a.m., 2.91

ft., 311 sec.-ft.
266 FLOODS OE MAY-JOTtE 1948 IS COLOMBIA RIVER BASHT

Deschutea River Basin

Deschutes River at Moody, near Biggs, Oreg.

Location.- Lat. 45°37», long. 120e 54', In SEi sec. 26, T. 2 M., R. 15 E., -at Moody, l£ 

miles upstream from mouth and 5 miles southwest of Biggs. Datum of gage Is 167.43 

feet above mean sea level, datum of 1929.

Drainage area.- 10,500 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

14,200 second-feet. Qage heights used to nundredths.

Maxima.- May-June 1948: Discharge, 10,300 second-feet 12 p.m. May 27 (gage height, 4.13

FeeT).

1897-99, 1906 to April 1948: Discharge, 

height, 10.2 feet).

Remarks.- Many diversions In upper river basin for Irrigation. 

Crane Prairie, Wickiup, Crescent Lake, and Ochoco Reservoirs.

43,600 second-feet Jan. 7, 1923 (gage

Affected by storage In

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

6j,650

6.4J5

6,340

6,720

6,790

7,230

7,340

7,530

7,560

7,190

June

8,760

9,190

9,000

9,030

 9.380 9,i?a

8,780

8,590

8,280

8,100

July

5,640

5,480

5,290

5,080

5,050

5,170

5,200

5,170

5,080

4,960

Day

11

12

IS

14

15

16

17

18

19

20

May

6,830

6,580

6,480

6,440

6,370

6,300

6,420

6,530

6,650

6,940

June

8,380

8,390

8,520

8,540

8,080

8,120

7,530

7,260

7,610

7,810

July

4,930

4,900

4,810

4,690

4,660

4,660

4,550

4,490

4,490

4,610

Day

21

22

28

24

25

26

27

28

29

30

31

Monthly mean discharge, in aecond-f eet . .. ___ .. ...,. . ... _ .........

Runoff, in inches ............................................................................................................................

May

7,450

8,180

8,660

8,440

8,550

8,570

9,860

10,200

9,880

9,410

8,780

7,526

0.83

June

7,940

7,720

7,450

7,080

6,7£0

6,400

6,100

. 5,930

5,700

5,600

7 flTQ

0.83

July

4,780

4,610

4,460

4,410

4,320

4,290

4,290

4,380

4,320

4,350

4,320

4,756

0.52

Gage height, in feet, and discharge, in second-feet, at indicated, time,

1

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8 

N 

4 

8 

12

4 

8

N 

4 

8 

12

4 

8 

N 

4 

8 

12

GW&| Discharge

May 17

3.10 

3.13 

3.13 

3.12 

3.11 

3.12

6,370 

6,480 

6,480 

6,440 

6,400 

6,440

May 23

3.70 

3.75 

3.74 

3.72 

3.71 

3.69

M:

4.06 

4.06 

4.01 

4.00 

3.98 

3.97

Ju

3.77 

3.79 

3.78 

3.83 

3.86 

3.87

8,600 

8,800 

8,760 

8,680 

8,640 

8,560

iy29

10,000 

10,000 

9,840 

9,800 

9,720 

9,680

ne4

8,880 

8,960 

8,920 

9,120 

9,240 

9,280

June 10

3.54 

3.59 

3.61 

3.54 

3.58 

3.58

Ju

3.55 

3.69 

3.60 

3.56 

3.53 

3.51

7,980 

8,170 

8,250 

7,980 

8,130 

8,130

ne!6

8,020 

8,560 

8,210 

8,060 

7*940 

7,870

Gage 

height Discharge

May 18

3.14 

3.15 

3.16 

3.15 

3.14 

3.15

Ml

3.68 

3.67 

3.66 

3.64 

3.64 

3.65

M

3.9? 

3.94 

3.90 

3.87 

3.84 

3.81

Ju

3.89 

3.89 

3.88 

3.90 

3.91 

3.92

Ju

3.56 

3.68 

3.65 

3.67 

3.69 

3.66

Ju

3.47 

3.44 

3.40 

3.39 

3.39 

3.36

6,510 

6,540 

6.580 

6,540 

6,510 

6,540

y24

8,520 

8,480 

8,440 

8,370 

8,370 

8,400

iy30

9,680 

9,560 

9,400 

9,280 

9,160 

9,040

ne5

9,360 

9,360 

9,320 

9,400 

9,440 

9,480

me 11

8,060 

8,520 

8,400 

8,480 

8,560 

8,440

me 17

7,720 

7,600 

7,450 

7,410 

7,410 

7,300

^Discharge

May 19

3.16 

3.17 

3.18 

3.19 

3.20 

3.21

6,580 

6,620 

6,650 

6,680 

6,720 

6,760

May 25

3.68 

3.70 

3.71 

3.69 

3.68 

3.68

Mi

3.79 

3.77 

3.74 

3.72 

3.70 

3.70

Jl

3.90 

3.89 

3.85 

3.81 

3.77 

3.74

8,520 

8,600 

8,640 

8,560 

8,520 

8,520

iy31

8,960 

8,880 

8,760 

8,680 

8,600 

8,600

me 6

9,400 

9,360 

9,200 

9,040 

8,880 

8,760

June 12

3.62 

3.62 

3.66 

3.69 

3.65 

3.61

8,290 

8,290 

8,440 

8,560 

8,400 

8,250

June 18

3.34 

3.34 

3.34 

3.34 

3.36 

3.31

7,230 

7,230 

7,230 

7,230 

7,300 

7,340

h^t | Discharge

May 20

3.23 

3.25 

3.27 

3.28 

3.29 

3.30

6,830 

6,900 

6,970 

7,010 

7,040 

7,080

May 26

3.69 

3.70 

3.69 

3.68 

3.69 

3.72

Ju

3.72 

3.73 

3.74 

3.75 

3.76 

3.78

Jl

3.73 

3.74 

3.75 

3.76 

3.75 

3.73

Ju

3.59 

3.65 

3.72 

3.71 

3.73 

3.75

Ju

3.39 

3.40 

3.44 

3.49 

3.50 

3.49

8,560 

8,600 

8,560 

8,520 

8,560 

8,580

mel

8,680 

8,720 

8,76O 

8,800 

8,840 

8,920

ne7

8,720 

8,760 

8,800 

8,840 

8,800 

8,720

ne!3

8,170 

8,400 

8,680 

8,640 

8,720 

8,800

ne!9

7,410 

7,450 

7,600 

7,790 

7,830 

7,790

iSgSl 0'**^

May 21

3.32 

3.36 

3.38 

3.43 

3.49 

3.54

7,150 

7,300 

7,380 

7,560 

7,790 

7,980

May 27

4.07 

3.98 

3.96 

4.03 

4.12 

4.13

Ju

3.85 

3.87 

3.87 

3.85 

3.84 

3.83

Ju

3.72 

3.73 

3.69 

3.68 

3.67 

3.6S

Ju

3.69 

3.70 

3.71 

3.69 

3.65 

3.80

10,100 

9,720 

9,640 

9,920. 

10,300 

10,300

ine2

9,200 

9,280 

9,280 

9,200 

9,160 

9,120

ne8

8,680 

8,720 

8,560 

8,520 

8,480 

8,400

me 14

8,560 

8,600 

8,640 

8,560 

8,400 

8,210

June 20

3.50 

3.50 

3.48 

3.48 

3.51 

3.52

7,830 

7,830 

7,750 

7,750 

7,870 

7,910

£j» j Discharge

May 22

3.57 

3.59 

3.59 

3.59 

3.61 

3.65

8,100 

8,170 

8,170 

8,170 

8,250 

8,400

May 28

4.10 

4.08 

4.07 

4.11 

4.O9 

4.09

Ju

3.84 

3.83 

3.79 

3.77 

3.77 

3.77

Jv

3.64 

3.64 

3.62 

3.60 

3.60 

3.57

10,200 

10,100 

10,100 

10,200 

10,200 

10,200

me 3

9,160 

9,120 

8,960 

8,880 

8,880 

8,880

ine9

8,370 8,370- 

8,290 

8,210 

8,210 

8,100

June 15

3.56 

3.55 

3.59 

3.55 

3.56 

3.55

8,060 

8,020 

8,170 

8,020 

&, 060 

8,020

June 21

3.52 

3.52 

3.54 

3.54 

3.54 

3.52

7,910 

7,910 

7,980 

7,980 

7,980 

7,910
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 267 

Kllckltat River Basin

Klickitat River near Pitt, Wash.

Location.- Lat. 45°45', long. 120°12', in SW£ sec. 8, T. 3 N., R. 13 E., 3| miles south 

of Pltt, 5 miles upstream from Silvias Creek, and 7 miles upstream from mouth at 

Lyle. Altitude of gage Is 285 feet (from river-profile map ) .

Drainage area.- 1,170 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

6,000 second-feet and extended to peak stage. Gage heights used to half-tenths 

betveen 4.4 and 6.8 feet; hundredths belov and tenths above these limits. Shiftingcontrol method used May 1 to July 31.

Maxima.- May-June 1948: Discharge, 6,860 second-feet 9:30 a.m. May 27 (gage height,

 7755 feet).

1909-12, 1928 to April 1948: Discharge observed. 21,000 seoond-feet Dec. 22, 1933 

(gage height, 12.5 feet, site and datum then.In use).

Remarks.- Small diversions above station for Irrigation. No regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,790

1,730

1,910

2,430

2,300

2,570

2,860

2,790

2,720

2,640

June

3,950

3,950

4,220

4,400

4,130

4,220

4,310

4,220

4,130

3,860

July

1,850

1,730

1,670

1,610

1,560

1,560

1,500

1,440

1,440

1,380

Day

11

12

13

14

15

16

17

18

19

m

May

2,570

2,570

2,720

2,570

2,500

2,570

2,640

2,640

2,640

2,940

June

3,950

3,770

3,260

3,020

2,860

3,430

3,340

2,940

2,720

2,640

July

1,390

1,360

1,360

1,360

1,320

1,310

1,300

1,360

1,320

1,290

Day

21

22 23

24

25

26

27

28

5»

30

31

Runoff, in inches ............................................................................................................................

May

3,430

3,770

3,950

4,040

4,130

4,400

6,100

5,890

5,280

4,500

4,130

3,217

3.17

June

2,640

2,500

2,360

2,230

2,160

2,100

2,040

2,040

1,970

1,970

3,178

3.03

July

1,280

1,250

1,210

1,180

1,150

1,130

1,140

1,130

1,100

1,100

1,090

1,351

1.33

Hood alTer Baain 

Hood River near Hood River, Oreg.

Location.- Lat. 45°42', long. 121°31', In SE£ sec. 36, T. 3 N., R. 10 E., at Powerdale, 

a quarter of a mile upstream from Pacific Power & Light Co."s plant and threequarters of a mile south of town of Hood River. Datum of gage IB 106.23 feet above 

mean sea level, datum of 1929.

Drainage area.- 329 square miles.

Gage-height record.- Water-stage recorder graph except for period July 24-26 and part 

of each day July 21-23, 27, 30, 31, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements. Dlscharge Tor periods of fragmentary or no gage-height record computed on basis of one 

gage reading and reconstructed graph.

Maxima.- May-June 1948: Discharge (river only), 2,270 seoond-feet 6 p.m. May 3 (gage

 Height, 3.95 feet).

1913-to April 1948: Discharge, 34,000 second-feet Jan. 6, 1923 (gage height, 11.1 

feet), no diversion by power conduit.

Remarks.- Diversions above station for irrigation. Daily discharge regulated by pondage 

at sawmill at Dee and by Pacific Power & Light Co.'s conduit which diverts about 450 

second-feet around gage.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

574

539

1,270

1,430

1,400

1,550

- 1,480

1,280

1,140

1,020

June

1,OSO

1,090

1,190

1,080

1,050

1,160

1,270

1,280

1,170

1,050

July

324

249

215

198

198

308

308

209

178

171

Day

11

12

13

14

15

16

17

18

19

m

May

932

948

972

684

820

884

939

873

838

871

June

1,240

1,120

1,120

895

819

939

759

649

607

668

July

185

159

135

110

94

81

94

112

103

92

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................................................................................

Runoff, in inches............................................................................................................................

May

967

1,080

1,080

1,170

1,310

1,490

1,590

1,630

1,340

1,160

1,120

1,115

3.91

June

839

645

550

485

426

388

375

384

397

402

837

2.84

July

84

66

82

65

60

56

135

175

84

66

65

144

0.50
268 FLOODS. 07 MAT-JUKE 1948 IK COLOMBIA RIVER BASIN

White Salmon River Basin

White Salmon River near Underwood, Wash.

Location.- Lat. 45e 45'00", long. 121°31'30 n , in NWj sec. 14, T. 3 N., R. 10 E., 1,000

feet downstream from Northwestern Electric Go's conduit power plant and 2 miles

north of Underwood and mouth. 

Drainage area.- 384 square miles. 

Gage-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Gag~e heights used to hundredths. Shifting-control method used May 1 to July 31. 

Maxima.- May-June 1948: Discharge, 2,530 second-feet (regulated) 11 p.m. May 26 (gage 

 Height, 5.69 feet).

1915-30, 1935 to April 1948: Discharge, 9,700 aecond-feet Dec. 29, 1917 (gage

height, 9.5 feet, datum then in use). 

Remarks.- Many diversions near Trout Lake for irrigation. Flow regulated by power

Mean discharge, in secondDay

1

2

3

4

5

6

1

8

9

10

May

1,260

1,230

1,350

1,690

1,760

1,980

2,090

1,960

1,840

1,790

June

1,830

1,780

1,860

1,850

1,830

1,770

1,800

1,810

1,840

1,830

July

1,110

1,030

1,040

1,010

1,000

996

1,030

1,080

1,030

994

Monthly mean discharge, in second-f et 

Runoff, in inches .......................................

Day

11

1?!

13

14

15

1fi

17

18

19

M

May

1,720

1,700

1,770

1,780

1,710

1,690

1,700

1,690

1,720

1,690

June

1,890

2,000

1,880

1,800

1,660

1,820

1,770

1,630

1,540

1,530

feet, 1948

July

1,000

905

957

920

912

844

847

868

873

864

Day

21

22

23

24

25

26

27

28

29

30

31

...........

May

1,800

1,900

1,990

2,020

2,110

2,260

2,330

2,330

2,270

2,040

1,900

1,841 

5.53

June

1,560

1,490

1,410

1,460

1,280

1,280

1,280

1,270

1,130

1,060

1,631 

4.74

July

856

836

801

842

799

803

792

822

782

. 776

792

910 

2.73

Little Vhlte Salmon River Basin

Little White Salmon River at Willard, Wash.

Location.- Lat. 45C 47'00", long. 121e 37'30", in HWJ sec. 1, T. 3 N., R. 9 JE., at

Willard, a quarter of a mile downstream from Lava Creek. 

Drainage area.- 117 square miles. 

Page-height record.- Water-stage recorder graph. 

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Gage heights used to half-tenths between 3.4 and 5.0 feet; hundredths below and

tenths above these limits. 

Maxima.- May-June 1948: Discharge, 771 second-feet 11 a.m. May 6 (gage height, 5.73

1903-6, 1944 to April 1948: Discharge, 4,140 second-feet Dec. 15, 1946 (gage 

height, 9.48 feet).

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

440

440

558

666

691

771

744

691

642

618

June

452

452

452

452

452

452

452

440

452

452

July

440

440

429

429

429

429

429

418

407

396

Day

11

1?,

13

14

15

16

17

18

19

20

May

582

570

570

558

546

546

534

522.

522

510

June

452

464

464

464

464

475

464

464

464

464

July

396

385

374

374

363

363

352

352

342

342

Day

fil

22

7S

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet . . ... .. __ . .

Runoff, in inches ...................................................... .. . ..........................................................

May

498

498

486

486

475

475

475

475

464

452

452

547

5.39

June

464

464

464

464

464

464

464

464

452

452

459

4.37

July

332

332

321

310

310

300

300

280

290

280

270

 362

3.56
FLOODS OF MAY-JOSE 1948 IK COLOMBIA RIVER BASIN 269

Wind River Basin

Wind River near Carson, Wash.

Location.- Lat.. 45°44'10 n , long. 121°48'10", In SW^NEi sec. 21, T. 3 H., R. 8 E., 

three-quarters of a mile upstream from Little Wind River, 1 mile northeast of 

Carson, and 2£ miles upstream from mouth. Discharge measurements made Just 

downstream from mouth- of Little Wind River.

Drainage area.- 225 square miles, Including that of Little Wind River.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Gage heights used to half-tenths below and tenths above 6.70 feet.

Maxima.- May-June 1948: Discharge, 3,920 second-feet 4 to 5 p.m. May 6 (gage height,

 TTSff feet).

1934 to April 1948: Discharge, 16,700 second-feet Dec. 29, 1937 (gage height, 

17.30 feet).

Remarks . - Plow occasionally affected by pondage at Forest Service power plant on 

irout Creek. Ho diversion.

Day

1

2

3

4

5

6

7

8

9

10

May

1,180

1,1OO

2,36O

3,290

3,000

3,590

3,290

2,640

2,240

1,88O

June

1,220

1,180

1,180

1,080

1,020

1,000

1,020

1,000

950

910

July

468

455

442

428

428

482

482

442

415

402

Day

11

12

18

14

15

16

17

18

1920

May

1,670

1,610

1,740

1,670

1,550

1,490

1,550

1,430

1,370

1,340

June

975

930

890

810

750

850

770

715

680

680

July

402

389

376

376

364

351

351

339

339

339

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ................ ...... ...................... _ ..... ...................

May

1,370

1,370

1,310

1,340

1,460

1,490

1,550

1,610

1,430

1,250

1,200

1,786

9.15

June

715

662

628

592

575

558

540

525

510

496

814

4.03

July

327

327

316

316

304

304

316

339

316

304

304

372

1.91

Sandy River Basin 

Sandy River below Bull Run River, near Bull Run, Oreg.

Location.- Lat. 45e 27', long. 122"15', In NW£ sec. 30, T. 1 8., R. 5 E., 1 mile downstream from Bull Run River and 2 miles northwest of Bull Run. Altitude of gage, 202 

*eet (from river-profile map).

Drainage area.- 440 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge-relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 8,150 second-feet 9 p.m. May 3 (gage height, 7.92

19io-14, 1929 to April 1948: Discharge, 58,000 second-feet Mar. 31, 1931 (gage 

height, 20.6.feet), from .rating curve extended above 15,000 second-feet. 

Remarks.- No diversion above- station for Irrigation; about 60,000 acre-feet annually 

diverted from Bull Run River by Portland Water Bureau. ' Practically no regulation of 

flow during period May to July by Bull Run Lake and Lake Ben Morrow Reservoir of 

Portland Water Bureau; considerable diurnal fluctuation July 19-31 by Bull Run power 

plant of Portland General Electric Co.

Mean discharge, in second-feet, 1948

Day

1

2

. 3

4

5

6

7

8

9

10

May

2,120

1,990

4,210

5,920

5,400

6,730

6,090

4,790

4,170

3,520

June

3,130

3,030

3,160

2,770

2,530

2,560

2,590

2,490

2,310

2,110

July

1,150

1,060

1,030

996

990

1,170

1,200

1,030

966

930

Day

11

12

13

14

15

16

17

18

19

20

May

3,180

3,210

3,520

3,160

2,880

3,120

3,160

3,010

2,730

2,690

June

2,320

2,150

2,090

1,810

1,650

1,710

1,530

1,430

1,350

1,640

July

900

864

816

780

770

770

687

633

721

678

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet __ . __ _ . __ .... _ . .. __ , ___ .. __. ..

Runoff, in inches ....................... .... . ................... _ .... ..................

May

3,020

3,080

3,040

3,380

3,960

4,170

4,180

4,750

3,960

3,300

3,120

3,728

.9.77

June

2,940

2,330

1,970

1,760

1,620

1,520

1,430

1,350

1,290

1,230

2,060

5.22

July

589

618

758

796

370

474

1,010

1,200

1,160

1,140

808

8.73

2.29
270 FLOODS OF MAY-JUNK 1948 IK COLUMBIA RIVER BASIK 

Vashougal River Basin

Washougal River near Washougal, Wash.

Location.- Lat. 45°37'20", long. IZZ'lS'OO", In SE$ sec. 27, T. 2 H., R. 4 E., half a

 ,mile above Cougar Creek and 5i miles northeaet of Washougal.

Drainage area.- 108 square miles.

Page-height record.- :3taff gage read twice dally.

Discharge recor'dT^~Stage-dlscharge relation defined by current-meter measurements.

Maxima. ^ May-June 1948: Discharge observed, 3,880 second-feet 4:30 p.m. May 3 (gage

1944 to April 1948s Discharge observed, 22,100 second-feet Feb. 7, 1945 (gage 

height, 14.40 feet). 

Remarks.- No diversion or regulation.

Mea.n discharge, in second-feet. 1948

Day

1

2

4

5

6

7

10

May

614

588

1,920

1,840

2,010

2,710

2,010

1,380

1,100

964

Monthly mean di 

Runoff, in inches

June

306

286

286

268

249

232

215

215

215

209

July

173

167

156

159

162

187

203

167

151

151

scharge, in second-fee

Day

11

12

13

14

15

16

17

18

19

«0

£

May

840

781

781

781

724

724

668

614

588

510

June

268

268

232

212

200

190

190

184

173

268

r July

151

140

135

135

130

125

120

120

123

123

Day

21

22

23

24

25

26

27

28

29

30

31

May

510

486

414

392

414

369

392

510

392

326

306

860 

9.18

June

326

306

286

249

249

232

209

193

190

236

2.44

July

118

106

104

130

120

139 

1.48

Wlllamette River Basin 

Wlllamette River at Salem, Oreg.

Location.- Lat. 44 0 56'40", long. 123°02'30", In SW£ sec. 22, T. 7 S., R. 3 V., 300 feet 

upstream from highway bridge at Salem. Datum of gage Is 113.61 feet above mean aea 

level, datum of 1929.

Drainage area.- 7,280 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-dlaoharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 48,500 second-feet 2 p.m. to 3 p.m. May 5 (gage

 Height, 7.29 feet).

1909-16, 1927 to April 1948: Maximum discharge observed, 315,000 second-feet 

Nov. ?5, 1909 (gage height, 30.5 feet).

Maximum discharge known, 500,000 second-feet Dec. 4, 1861 (gage height, about 

39 feet), from rating curve extended above 250,000 second-feet in 1916. 

Flood of Feb. 5, 1890, reached a stage of 37.1 feet.

Remarks.- Many small diversions above station for Irrigation; part of flow of Salem 

Canal, which diverts water from North Santlam River, returns to Wlllamette River 

below station, through Mill Creek at Salem. Flow regulated at times by Cottage 

Grove and Fern Ridge Reservoirs. Gage-height record collected in cooperation with 

IT. S. Weather Bureau.

Mean discharge, in second-feet, 19Jf8

Day

1

2

3

4

5

6

7

8

9

10

May

23,400

21,900

21,600

38,200

47,800

44,800

43,900

42,900

39,900

36,200

June

24,200

23,800

23,600

24,100

22,900

21,200

21,100

22,600

23,000

21,900

July

10,800

10,500

10,100

9,650

9,330-

9,360

9,880

9,970

9,430

8,880

Day

11

12

13

14

15

16

17

18

19

20

May

32,300

28,700

28,200

30,600

29,800

27,400

27,300

28,300

27,600

26,300

June

21,700

23,400

21,900

20,100

18,600

17,100

16,100

15,300

14,700

14,600

July

8,580

8,340

7,980

7,720

7,420

7,180

7,030

6,950

6,900

6,790

Day

21

22

28

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ... .. . ... .... .. . .........'........................ ..... ___ ..

Runoff, in inches ...........................................................................................................................

May

25,700

25,900

25,200

24,700

25,900

28,100

29,800

30,800

31,800

28,700

25,500

30,620

4.85

June

14,900

16,300

16,000

14,700

13,600

12,900

12,400

11,900

11,400

11,100

18,240

2.79

July

6,640

6,450

6,380

6,320

6,230

6,140

6,030

6,050

6,380

6,320

6,050

7,799

1.24

Willamette River at Portland, Oreg. 

Location.- Lat. 45°32', long. 122'4,0', In SE£ sec. 34, T. 1 N., R. 1 E., at Morrison

Street Bridge in Portland, 13 miles upstream from mouth. Datum of gage Is 1.15 feet

above mean sea level (levels by U. S. Weather Bureau). 

Drainage area.- 11,250 square miles (authority, U. S. Weather Bureau). 

gage-height record.- One or more gage readings daily. 

Maxima.- Hay-June 1948; Gage height observed, 29.975 feet 2 to 4 a.m. June 14, read

by Portland Harbor Patrol.

1879 to April 1948: Gage height, 33.0 feet June 7, 1894. 

Flood stage considered to be 18 feet.

Remarks.- Gage heights affected by backwater from Columbia River to such an extent that 

 there was practically no slope between station and mouth of river. Records furnishec

by U. S. Weather Bureau.
WILLAMETTE RIVER BASIN

Willamette River at Portland, Oreg. Continued

Mean gage height, in feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

8.9

8.8

9.0

10.3

11.4

12.1

12.8

12.9

12.8

13.2

June

29.8

29.5

29.4

29.3

29.4

29.7

29.6

29.6

39.6

29.8

July

20.2

19.7

18.8

17.9

17.2

16.6

15.8

15.2

14.5

13.8

Day

11

12

13

14

15

16

17

18

19

20

May

13.7

14.3

14.4

14.3

14.0

14.4

14.8

14.7

15.0

15.7

June

29.7

29.7

29.9

29.8

29.3

28.8

28.0

27.4

26.8

26.4

July

12.9

12.2

11.6

10.9

10.3

9.8

9.5

9.0

8.8

8.7

Day

21

22

23

24

25

26

27

28

29

30

31

May

16.7

18.1

19.5

20.9

22.3

23.0

24.0

25.2

26.5

28.0

29.2

June

26.1

25.6

25.1

24.6

24.1

23.4

22.8

22.0

21.4

20.6

July

8.3

8.2

7.9

7.4

6.8

6.3

6.0

5.9

5.8

5.6

6.0

Mill Creek at Salem, Oreg.

Location.- Lat. 44°56'05", long. 123°01'00", in NE£ sec. 26, -T. 7 S., R. 3 W., at 

State Street Bridge in Salem, 220 feet downstream from 19th Street diversion. 

Datum of gage is 165.50 feet above mean sea level, datum of 1929.

Drainage area.- 108 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 430 second-feet (regulated) 8 a.m. May 4 (gage

1938 to April 1948: Discharge, 1,110 second-feet Feb. 7, 1943 (gage height, 

5.53 feet, from floodmarK); .gage height, 5.61 feet Dec. 15, 1946. 

Remarks.- Salem power canal diverts water into Mill Creek near Stayton; several 

diversions from Mill Creek, including Shelton flood bypass l£ miles upstream, 

and 19th Street power diversion 220 feet upstream. Diurnal fluctuation caused 

by power plants above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

76

101

222

294

270

311

295

297

260

227

June

62

57

56

52

44

45

45

45

44

51

July

29

28

26

26

28

19

19

21

19

12

Day

11

12

13

14

15

16

17

18

19

20

May

197

132

234

191

156

146

142

110

94

106

June

42

57

58

42

41

34

36

38

37

38

July

4.0

8.5

16

24

30

39

46

46

50

52

Day

21

m

?,s

?4

?,5

?fi

m

28

«9

30

31

Monthly mean discharge, in second-feet....................................................... . ............. ...

Runoff, in inches ...........................................................................................................................

May

88

71

65

56

44

68

76

111

108

92

70

154

June

42

42

47

48

50

48

53

.47

45

37

46.1

July -

53

53

47

51

57

52

58

58

58

56

46

36.5

South Yamhill River near Whiteson, Oreg.

Location.- Lat. 45°10'10", long. 123°12'25", in NW£ sec. 5, T. 5 S., R. 4 W., at

 Vhiteson Bridge on Pacific Highway West, 1 mile downstream from Salt Creek and 

l£ miles northwest of Whiteson. Datum of gage is 82.30 feet above mean sea level, 

datum of 1929.

Drainage area. r 502 square miles.

ftage-heighfc record.- Water-stage recorder graph except for period June ZO-29, when 

there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements

 below 17,000 second-feet. Discharge for period of no gage-height record computed

on basis of records for North Yamhill River near pike. 

Maxima.- May-June 1948: Discharge, 4,340 second-feet 11:30 a.m. May 4 (gage height,

 21.03 feet).

1940 to April 1948: Discharge, 24,500 second-feet Jan. 7, 1948 (gage height,

Remarks.- Small diversions above station for irrigation. Gage-height record collected

 in cooperation with U. S. Weather Bureau.

Mean discharge, in second-feet^ 1948

Day

1

4

5

6

7

10

May

1,530

1,380

1,610

4,020

3,610

3,710

3,590

3,170

2,680

2,280

June

650

602

561

523

506

474

443

403

381

366

July

166

162

157

157

161

177

198

185

177

162

Monthly mean discharge, in seccnd-fe* 

Runoff, in inches .......................................

Day

11

12

13

14

15

16

17

18

19

20

May

r 1,970

1,750

1,780

1,870

1,660

1,520

1,660

1,460

1,340

1,300

June

356

339

328

318

308

292

278

271

263

270

July

152

146

135

126

115

115

110

108

109

104

it .................................................................

Day

21

22

23

24

25

26

27

28

29

30

31

May

1,170

1,060

988

920

850

799

772

848

952

834

724

1,736 

4.06

June

280

270

260

240

230

220

210

195

185

177

340 

0.77

July

100

97

91

93

91

88

90

127 

0.30
272 RWODS 1948 OT KW8W B*SI»

North Yamhlll River near Pike, Oreg.

Location.- Lat. 45°22'15", long. 123°17'10", In NE$ aec. 27, T. 2 S., R. 5 W., l£ miles 

downstream from Haaklna Creek and l| miles vest of Pike. Datum of gage IB 249.2 

feet above mean aea level (Corps of Engineers bench mark).

Drainage area.- 48 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements 

belov 2,600 second-feet.

Maxima.- May-June 1948i Discharge, 610 second-feet 12:30 p.m. May 3 (gage height, 3.45

1940 to April 1948: Discharge, 3,830 second-feetUec. 18, 1941 (gage height, 8.24 

feet), affected by release of vater from log pond upstream.

Remarks.- Occasional diurnal fluctuation caused by small dams upstream] no seasonal 

regulation. Water supply for city of McMlnnvllle Is ^diverted from Basklns Creek - 

above station, mean annual diversion being about 1 second-fool.

Day

1

2

3

4

5

6

7

8

9

10

May

176

167

396

360

408

450

375

293

251

219

June

102

96

91

89

86

80

77

74

72

70

July

35

35

34

34

36

41

38

37

35

33

Day

11

12

13

14

15

16

17

18

19

20

May

198

243

313

276

251

265

243

219

211

194

June

70

68

66

65

64

61

59

58

57

64

July

32

31

29

27

28

27

25

26

26

26

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in seccnd-feet . ... . ................................

Runoff, in inches

May

176

164

152

139

128

126

124

155

130

117

107

227

5.44

June

58

56

52

50

49

47

45

43

38

35

64.7

1.50

July

26

25

25

24

23

22

25

25

23

22

21

28.9

0»69

Molalla River near Canby, Oreg.

Location.- Lat. 45°15', long. 122°41', In !IE£ sec. 9, T. 4 S., R. IE., at bridge l£

miles south of Canby. Datum of gage Is 104.56 feet above mean sea level, datum of

1929.

Drainage area.- 323 square miles. 

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge, 4,380 second-feet 10:30 p.m. May 3 (gage height,

S7T5 feet).

1928 to April 1948: Discharge, 25,100 second-feet Jan. 7, 1948 (gage height,

14.9 feet). 

Remarks.- Small diversions above station for Irrigation] no regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,090

982

1,970

3,440

2,730

3,070

3,160

2,690

2,220

1,870

June

l,l£0

1,040

982

878

774

735

720

698

640

581

July

258

246

232

226

218

236

286

250

222

209

Day

11

12

13

14

15

16

17

18

19

20

May

1,620

1,520

1,780

1,630

1,450

1,400

1,410

1,340

1,240

1,200

June

675

661

587

527

474

436

410

380

362

380

July

200

194

182

175

170

165

160

148

155

155

Day

21

22

23

24

25

26

27

23

29

80

31

Monthly mean discharge, in second-feet ... .... ....................................................... _ ......

Runoff, in inches ............................................................................................................................

May

1,190

1,180

1,140

1,150

1,300

1,320

1,270

1,490

1,400

1,240

1,200

1,667

5.95

June

587

557

491

436

395

371

344

317

294

278

571

1.97

July

148

142

142

148

140

131

135

17$

170

150

138

184

0.66
VXELAMBTTE RIVER BASIN 273

Pudding River at Aurora, Oreg.

Location.- Lat. 45°14', long. 122°45', In SEfc sec. 12, T. 4 S., R. 1 W., at highway

bridge at Aurora, half a mile upstream from Mill Creek. Datum of gage Is 76.79

feet above mean sea level, datum of 1929. , 

Drainage area.- 493 square miles. 

Gage-height record.- Wire-weight gage read twice dally prior to June 30, once dally

thereafter.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Maxima.- May-June 1948: Discharge observed, 2,760 second-feet 6:20 p.m. May 7 (gage 

 Kelght, 10.64 feet).

1928 to April 1948: Discharge, 19,400 second-feet (revised) Dec. 30, 1937 (gage

height, 24.5 feet, from graph based on gage readings), from rating curve extended

above 11,600 second-feet.

Maximum stage known, 25.0 feet Jan. 9, 1923 (discharge* 20,700 second-feet,

revised, from subsequent rating curve extended above 11,600 second-feet). 

Remarks.- Small diversions above station; slight regulation at times In summer by mills

on tributaries.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,220

1,100

1,050

2,190

2,550

2,590

2,760

2,670

2,410

2,080

June

785

695

621

577

549

521

489

451

425

401

July

186

175

175

162

163

165

175

206

213

186

Day

11

12

13

14

15

16

17

18

19

20

May

1,800

1,590

1,580

1,640

1,500

1,330

1,260

1,190

1,090

1,020

June

389

431

445

413

381

353

327

314

301

292

July

170

163

160

154

142

141

128

122

124

122

Day

21

22

23

24

25

26

27

28

29

ft)

31

Runoff, in inches ...... .................. . . . .... ...............................................

May

978

920

850

795

760

745

700

738

1,020

950

828

1,420

3.31

June

310

367

339

292

268

251

240

228

214

199

396

0.90

July

124

121

117

117

116

115

112

108

119

128

121

146

0.34

Tualatln River near Wlllamette, Oreg.

Location.- Lat. 45°21 f 05", long. 122°40'35", In SWj- sec. 34, T. 2 S.. R. 1 E., 300 feet 

upstream from county bridge and 1 mile northwest of Wlllamette. Datum of gage Is 

85.61 feet above mean sea level, datum of 1929 (levels by Corps of Engineers).

Drainage area.- 710 square miles.

Page-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 3,420 second-feet 2 p.m. to 10 p.m. May 8 (gage

 Kelght, 7.55 feet).

1928 to April 1948: Discharge, 23,300 second-feet Dec. 23, 1933 (gage height, 

17.72 feet, present datum).

Remarks. - Oswego Canal diverts water 4£ miles above station, average diversion being 

72 second-feet In May, 73 second-feet In June, and 69 second-feet In July (Included 

In monthly values below).

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,420

1,310

1,370

1,700

2,140

2,760

3,220

3,410

3,360

3,240

June

888

838

794

734

695

645

425

378

418

410

July

179

167

159

159

157

162

174

184

186

184

Day

11

12

13

14

15

16

17

18

19

20

May

3,070

2,840

2,590

2,290

2,080

1,910

1,800

1,730

1,640

1,540

June

398

398

410

410

386

366

347

329

318

315

July

176

164

150

139

127

111

106

102

97

94

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet _ ....................... _ ........... _ .... _ .........................

Runoff, in inches ......................._...................................................................................................

May

1,470

1,390

1,270

1,170

1,100

1,050

993

981

1,020

1,060

975

1,940

3.15

June

329

344

336

301

278

259

243

234

225

200

494

a 78

July

94

90

90

90

88

87

85

83

82

80

78

196

0.32
274 FLOODS OF MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

Clackamas River near Cazadero, Oreg.

Location.- Lat. 45 8 14', long. 122°16', in NEfc sec. 11, T. 4 S., R. 4 E., half a mile 

upstream from backwater from Cazadero Dam of-Portland General Electric Co., and 3 

miles southeast of Cazaderp. Datum of gage is 532.0 feet above mean sea level 

(levels by Portland General Electric Co.); gage readings have been reduced to elevations above mean sea xevel.

Drainage area.- 665 square miles.

Page-height record.- Water-stage recorder graph, adjusted May 3 because of sluggish 

inlet condition on basis of outside gage reading

Discharge record.- Stage-discharge relation defined by current-meter measurements below 

23,400 second-feet, and extended on basis of computation of flow over dam.

Maxima.- May-June 1948: Discharge, 7,400 second-feet May 3, computed on basis of 

records for Clackamas River above Three Lynx Creek.

1909 to April 1948: Discharge, 60,800 second-feet Mar. 31, 1931 (elevation, 

556.5 feet).

Remarks.- Some diurnal fluctuation due to Oak Grove power plant.

Day

1

2

3

4

5

6

7

8

9

10

May

2,680

2,540

3,730

6,290

5,470

5,560

5,840

5,110

4,420

3,880

June

4,140

4,060

4,240

3,990

3,600

3,470

3,600

3,690

3,590

3,340

July

1,710

1,660

1,610

1,570

1,550

1,580

1,600

1,560

1,500

1,460

Day

11

12

13

14

15

16

17

18

19

ao

May

3,540

3,360

3,640

3,650

3,400

3,360

3,490

3,560

3,420

3,280

June

3,450

3,350

3,110

2,900

2,66C

2,560

2,440

2,300

2,210

2,170

July

1,430

1,400

1,370

1,340

1,320

1,300

1,290

1,280

1,290

1,290

Day

21

22

23

24

25

26

27

28

29

80

31

Runoff, in inches ............................................. . ............. ............................................................

May

3,270

3,360

3,460

3,700

4,390

5,030

5,420

5,800

5,470

4,800

4,290

4,168

7.23

June

2,630

2,620

2,400

2,220

2,100

2,010

1,940

1,890

1,830

1,760

2,876

4.82

July

1,270

1,240

1,240

1,230

1,200

1,180

1,200

1,320

1,300

1,240

1,180

1,378

2.39

Johnson Creek at Sycamore, Oreg.

Location.- Lat. 45°28'40 n , long. 122°30'30", in lot 2, SWfc sec. 13, T. 1 S.j R. 2 E., 

a third of a mile southwest of Sycamore station. Datum of gage is 228.03 feet 

above mean sea level, datum of 1929.

Drainage area.- 28.2 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements 

below 1,100 second-feet.

Maxima.- May-June 1948s Discharge, 336 second-feet 6:30 a.m. May 6 (gage height, 5.12

1940 to April 1948: Discharge, 1,820 second-feet Jan. 7, 1948 (gage height, 

13.06 feet} 

Remarks.- Small diversions above station for irrigation; no regulation.

Mean discharge, in second^ bet, 1948

Day_

1

2

3

4

5

6

7

8

9

10

Msy

34

30

106

91

231

278

156

106

80

62

June

14

12

11

10

9.0

8.2

7.0

6.6

6.6

July

4.0

4.0

4.0

4.0

4.0

4.5

5.3

4.9

4.3

4.0

Day

11

12

13

14

15

1fi

17

18

19

20

May

50

52

52

44

37

32

29

24

23

23

June

13

9.9

9.4

8.2

7.4

7.0

6.6

6. a

5.7

7.4

July

4.0

4.0

4.0

3.8

3.8

3.8

3.6

3.6

3.6

3.6

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet ..... . ........ _ .. ....... ___ ......... __

Runoff, in inches............................................................................................................................

May

19

17

15

13

12

11

12

46

29

20

15

56.4

2.31

June

9.9

7.8

7.4

6.6

5.7

5.3

5.3

4.9

4.5

4.0

7.93

0.31

July

3.6

3.6

3.8

3.6

3.4

3.1

4.0

4.0

4.-0

3.8

3.6

3.91

0.16
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Lewla River Baa in

Levis River near Ariel, Wash.

Location.- Lat. 45°57'10", long. 122°33'45", in NW^NE^ sec. 4, T. 5 N., R. 2 E., at

 Ariel, half- a mile downstream from Ariel Dam and power plant and 3 miles upstream 

from Cedar Creek. Datum of gage is 44 feet above mean sea level, unadjusted 

(levels by Northwestern Slectric Co j.

Drainage area.- 731 square miles.

gage-height record.- Water-stage recorder graph except period 10 p.m. June 11 to noon 

June 22, when there was no gage-height record.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

 Sage heights used to hundredths. Discharges for period of no gage-height record

computed on basis of power-plant records. 

Maxima.- May-June 1948: Discharge, 16,500 second-,feet 7 p.m. May 6 (gage height, 10.1^

1909, 1922 to April 1948: Discharge, 129,000 second-feet Dec. 22, 1933 (gage 

height, 35.0 feet, from floodmarks). 

Remarks.- No diversions. Flow regulated by Lake Merwin Reservoir on Lewis River, lat.

 45"57'50", long. 122°33'10", in SW£ sec. 34, T. 6 N., R. 2 E., at Ariel, completed 

in 1931; usable storage, 246,000 acre-feet between elevations 165 feet (set by 

Federal Power Commission) and 235 feet (.spillway crest) above mean sea level. Water 

is used for power. Figures of discharge not corrected for change in contents of Lake 

Merwin. Gage-height record collected in cooperation with Pacific Power & Light Co.

Mean discharge, in secoruL-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

4,630

4,360

7,260

8,860

9,960

14,500

14,600

11,000

9,120

7,480

June

6,750

6,740

7,690

6,920

6,590

6,880

7,200

7,420

7,230

6,840

Jufy

3,470

3,450

3,260

1,780

972

2,600

2,480

2,750

3,610

2,500

Day

11

12

IS

14

15

16

17

18

19

20

May

6,890

6,680

7,260

7,330

6,730

6,880

6,790

6,700

6,400

6,230

June

5,020

6,690

6,100

5,450

4,800

5,270

4,910

4,410

3,890

4,310

July

671

2,270

2,120

2,010

1,730

2,070

1,480

655

2,110

2,120

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .... . .....

Runoff, in inches ........ ................................................... .......... .....................................................

May

6,450

7,100

6,920

7,540

8,650

9,750

10,000

10,000

8,690

7,350

6,870

8,032

12.67

June

4,500

3,890

3,910

3,420

3,410

3,380

3,250

2,550

2,380

2,990

5,160

7.88

July

2,110

2,110

1,650

694

646

2 r04C

1,500

1,960

1,810

1,980

1,090

1,990

3.14

East Pork Lewis River near Heisson, Wash.

Location.- Lat. 45°50', long. 122°28', in N£ sec. 17, T. 4 N., R. 3 E., Just upstream 

from Basket Creek, lj miles northeast of Heisson, and 20 miles upstream from mouth. 

Datura of gage is 366.8 feet above mean sea level (from river-profile surveys).

Drainage area.- 125 square miles.

Sage-height "record.- Water-stage recorder graph.

Discharge reeQrd.- Stage-discharge relation defined by current-meter measurements. 

Gage heights used to half-tenths between 2.4 and 6.1 feet; hundredths below and 

tenths above these limits. Shifting-control method used July 6-31.

Maxima.- May-June 1948: Discharge, 3,330 second-feet 6 a.m. May 6 (gage height, 6.09

1929-48: Discharge, 15,600 second-feet Dec. 22, 1933 (gage height, 12.3 feet), 

from rating curve extended above 12,000 second-feet. 

Remarks.- No diversion or regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

590

570

1,830

1,920

2,060

2,950

2,290

1,680

1,320

1,070

June

427

400

390

357

332

320

305

288

267

249

July

159

154

147

142

147

168

174

155

136

135

Day

11

1?,

13

14

15

16

17

18

19

m

May

935

960

1,010

935

835

860

835

720

675

630

June

314

272

272

235

217

208

198

189

183

254

July

130

124

118

113

109

105

104

105

115

117

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches.......................................................................................................................

May

652

610

550

570

590

550

530

698

530

466

444

996

9.18

June

335

308

275

249

230

217

204

189

176

164

267

2.39

July

110

104

101

97

92

89

133

166

132

114

103

126

1.16
276 FLOODS OP MAT-JUKE 1948 IS COLUMBIA RIVER BASUT

Kalama River Baa In

Kalama River belov Italian Creek, near Kalama, Wash.

Location.- Lat. 46 e 02'30"J long. 122 0 49'00" 1 In sec. 33, T. 7 N., R. 1 ¥.,

miles northeast of Kalama and 4 miles above mouth. 

Drainage area.- 195 square miles. 

Gage-height record.- Staff gage read tvice dally.

Discharge record. -~Stage-dlscharge relation defined by current-meter measurements. 

Maxima.- May- June 1948: Dlacharge observed, 5,340 aecond-feet 6 p.m. May 6 (gage height,

7754 feet).

1946 to April 1948: Dlacharge observed, 14,400 second-feet Dec. 13, 1946, gage

height, 13.40 feet), from rating curve extended above 6,670 second- feet. 

Remarka . - Negligible amount of diversion above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

1,070

1,000

1,490

2,060

2,700

4,820

3,860

2,600

2,060

1,730

June

1,000

1,000

1,000

881

881

881

881

881

821

707

July

498

474

474

450

450

498

523

474

450

450

Day

11

\?,

13

14

IB

16

17

18

19

20

May

1,570

1,570

1,730

1,810

1,650

1,570

1,490

1,420

1,340

1,340

June

821

763

763

652

626

599

599

574

574

652

July

426

404

404

404

404

382

382

382

382

382

Day

21

ft?

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .. .

Runoff, in inches ......................................... .... . . ..............................................................

May

1,420

1,340

1,270

1,270

1,420

1,420

1,340

1,490

1,270

1,140

1,070

1,720

10.17

June

763

707

652

626

599

574

548

523

523

498

719

4.11

July

382

359

359

359

338

338

404

404

382

359

338

410

2.42

 Cowlltz River Basin

Cowlltz River at Castle Rock, Wash.

Location.- Lat. 46 e 16 1 30", long. 122°55'00", In SE£ aec. 10, T. 9'N., R. 2 ¥., at hlghway bridge In Castle Rock, 2£ miles downstream from Toutle River and 14 miles upstream from mouth. Datum of gage Is 19.73 feet above mean sea level, datum of 1929.

Drainage area.- 2,240 square miles.

Gage-height record.- Water-stage recorder graph.

Discharge record.-"Stage-discharge relation defined by current-meter measurements. 

Gage heights used to hundredths.

Maxima.- May-June 1948: Discharge, 30,000 second-feet 5 to 6 p.m. May 28 (gage height,

1926 to April 1948: Discharge obaerved, 139,000 second-feet Dec. 23, 1933 (gage 

height, 31.6 feet, present datum).' 

Remarks.- No diversion or regulation.

Mean discharge, in second-feet. 1948

Day

1

2

3

4

5

6

7

8

9

10

May

8,030

7,450

8,970

12,600

15,400

23,000

28,800

24,000

19,100

16,100

June

16,900

17,600

19,300

19,900

17,700

17,900

19,800

21,400

21,600

20,900

July

9,600

8,320

7,360

7,030

6,720

6,270

6,550

6,330

5,500

5,440

Day

11

12

18

14

IB

IB

17

18

19

m

May

13,900

13,100

14,000

14,500

13,400

12,700

13,100

13,500

13,000

12,900

June

1 20,200

20,900

17,900

15,800

13,900

12,900

14,300

12,900

11,600

11,700

July

5,440

5,390

5,010

4,960

4,880

4,800

4,740

4,770

4,980

4,740

Day

21

22

28

24

25

26

27

28

29

.30

31

Monthly mean discharge, in second-feet . ......................................... __ .........

Runoff, in inches ............................................................................................................................

May

13,900

16,100

16,900

16,500

19,100

23,100

26,000

29,300

27,000

21,400

17,400

16,910

8.70

June

13,400

13,800

12,000

11,000

10,500

10,000

9,750

9,720

9,900

10,200

15,180

7.56

July

4,550

4,420

4,260

4,230

3,950

3,770

3,950

4,690

4,360

3,920

3,790

5,314

2.73
FLOODS OF MAY-JUNE 1948 Bt COLUMBIA RIVER BASBt 277

Elokomln River Baain

Elokomln River near Cathlamet, Wash.

Location.- Lat. 46°13'10", long. 123°20'30 I> , in SE£ sec. 31, T. 9 N., R. 5 W., 2 miles 

northeast of Cathlamet and 4 miles upstream from mouth. Datum of gage is 29.60 feet 

above mean sea level, datum of 1929.

Drainage area.- 66 square miles.

Page-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements. 

Oage heights used to hundredths below and half-tenths above 3.9 feet. Shiftingcontrol method used June 1 to July 31.

Maxima.- May-June 1948: Discharge, 1,630 second-feet 2:30 a.m. May 6 (gage height, 

6.20 feet).

1940 to April 1948: Discharge, 6,210 second-feet Jan. 25, 1947 (gage height, 

10.76 feet).

Maximum stage known, 17.2 feet in December 1933, from information by local 

residents.

Remarks.- Mo diversion or regulation.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

277

261

506

566

844

1,410

938

710

566

475

June

163

156

152

148

142

134

130

124

120

118

July

69

68

68

64

68

75

74

74

66

62

Day

11

12

13

14

15

16

17

18

19

20

May

408

424

441

398

370

382

367

328

308

310

June

120

118

113

109

105

102

98

9896*

115

July

60

58

57

56

53

50

49

49

53

54

Day

21

22

23

24

25

26

27

28

29

30

31

Runoff, in inches ............................................................................................................................

May

274

256

241

226

214

203

200

241

203

182

176

7.16

June

115

100

94

91

86

84

82

77

74

70

1.88

July

51

47

47

44

43

43

57

53

47

43

41

56.2

0.98

Youngs River Basin

Youngs River near Astorla, Oreg.

Location.- Lat. 46°04', long. 123°47', In NW£ sec. 27, T. 7 H., R. 9 W., 50 feet upstream from crest of Youngs River Palls, 2^ miles southwest of Olney, and 9 miles 

southeast of Astorla. Datum of gage Is 62.64 feet above mean sea level, datum of 

1929.

Drainage area.- 32 square miles.

gage-height record.- Water-stage recorder graph.

Discharge record.- Stage-discharge relation defined by current-meter measurements.

Maxima.- May-June 1948: Discharge, 708 second-feet 1:30 a.m. May 6 (gage height, 5.96

1927 to April 1948': Discharge, 6,300 second-feet Nov.. 24, 1927 (gage height, 

6.52 feet, site and datum then In use), from rating curve extended above 2,000 

second-feet. 

Remarks.- No diversion or regulation above station.

Mean discharge, in second-feet, 1948

Day

1

2

3

4

5

6

7

8

9

10

May

142

128

288

265

470

582

412

307

232

188

June

51

48

45

44

42

38

34

33

31

3C

July

15

15

15

15

15

15

15

15

14

13

Day

11

12

13

14

15

16

17

18

19

20

May

160

173

236

271

217

190

165

142

128

132

June

29

29

28

28

27

25

25

24

23

36

July

12

12

11

11

11

10

10

11

12

13

Day

21

22

23

24

25

26

27

28

29

30

31

Monthly mean discharge, in second-feet .............. _ ..................... _ .............. _ ..................

Runoff, in inches ........................................................................................I.... ...............................

May

113

101

93

84

79

75

70

81

69

61

55

184

6.63

June

48

33-

27

24

24

23

22

20

18

16

30.8

1.08

July

12

11

11

9.8

9.3

9.1

16

15

13

11

9.8

12.5

0.45
278 FLOODS OF MAY-JTJNE 1948 IN COLUMBIA RIVER BASIN 

SUMMARY OF FLOOD STAGES AND DISCHARGES

The results of the determinations of maximum flood flows at existing streamgaging stations and other places on streams In the area covered by this report are 

summarized and presented in table 3, "Summary of flood stages and discharges." The 

time of day in this table is for standard time. The map reference number in this 

table Is applicable to plate 6 (in pocket) and will aid In identifying the place where 

the discharge was determined.

The discharges for the existing stream-gaging stations were determined by methods 

described in greater detail in the presentation of the record for the respective 

stations in the section "Stages and discharges at stream-gaging stations." For 

existing stream-gaging stations the method of determination is designated "Stagedischarge relation," because the determination is based on the comprehensive studies 

of that subject that are conducted at such stations. Where the recorded discharge 

was not measured at a regular station a brief reference is generally made to the 

method of determination.

At some places pertinent information regarding stages antedating the period of 

record of discharge is shown by a footnote. Explanatory footnotes on other features 

of the table are also included.

Figure 19 shows the flood discharges, in second-feet per square mile, which are 

listed in table 3, plotted against the corresponding drainage areas. In this 

connection it should be understood that except for a small number of items as indicated 

in the table the discharges are given as observed and many are affected by artificial 

storage, release of water resulting from failure of dams, or other similar factors, on 

which available information is presented in the preceding section, "Stages and discharges at stream-gaging stations during the flood period."

The basic data and computations for the determinations of discharge are filed in 

the district offices of the Geological Survey in the several districts where the floods 

occurred and may be examined in those offices.
SUMMARY OP FLOOD STAGES AND DISCHARGES 279

9 a a 

aavnos aad laaj-oNOoas NI 'soavnosia

824933 O - 49 - 20
FLOODS OF MAY-JUNE 1948 IN COLUMBIA KTVEH BASlff

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SUMMARY OP FLOOD STAGES AND DISCHARGES

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0 » * .CJ.H
282 FLOODS OF MAY-JUKE 1948 IH COLUMBIA RIVER BASIN

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Eattleinake Creek at Mieeoula. Mont.

West 1'ork Bltterroot River near Conner, Mont.

Bltterroot Elver near Darby, Mont.

East fork Bltterroot Elver at Conner, Mont.

Bock Creek near Darby, Mont.

Loit Horse Creek near Hamilton, Mont.

Skalkaho Creek near Hamilton, Mont.

Blodgett Creek near CorvallU, Mont.

1'red Burr Creek near Victor, Mont.

Bear Creek near Victor, Mont.

Kootenai Creek near Stevenivllle, Mont.

Burnt fork Creek near Sterengvllle, Mont.

Lolo Creek near Lolo, Mont.

Nlnemlle Creek near Ninemile, Mont.

i'lsh Creek near larklo, Mont.

St. Begis Elver near St. Beglg, Mont.

Flathead Elver at Flathead. fi. C.

Jlathead Elver near Columbia 1'alls, Mont.

ilathead Elver at Columbia Vails, Mont.

Ilatbead Elver near Poison, Mont.

Middle fork 1'lathead Elver at issex. Mont.

Middle Jerk Jlathead Elver at Bel ton, Mont.

kiddle 1'orte 1'lathead River near Belton, Mont.

Bear Creek near )&e»ex, Mont.

398

73-8

322

1,050

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55-5

67.0

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26. 8

18.6

26.6

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146

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517

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1921-23

May to

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1941-US

1937-^S

1937-1*8

1946.

1948

-

1920-2U

1947-48

-

1938-48

-

1920-21*.

1938-1*8

1911-15

-

-

1910-17

1929-1*8

1910-17.

1929-48'

1922-23,

1928-48

1907-48

1939-48

1910-23,

1929-33.

1943-47

igsg-^s

1946-48

May 12, 26.

1922

June 18. 1899

May 9. 1947

May 9. 1947

May 9. 1947

May 10, July

4-10. 1946

-

June 14, 1922

May 9. 1947

-

Apr. 18, 1938

-

May 28, 1938

May 28, 1913

-

-

May 28, 1917

7 a.m. June 17,

1933

June 20, 1916

1894

May 29. 30,

1928

May 24, 1942

June 21, 1916

June 18. 1943

May 2, 1947

3-9

6.25

u .17

8.18

5.78

U4.10

-

3.80

6.10

-

3.*9

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2.92

5.2

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8.65

7.10

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2.87

2.400

2. 047

4,020

11,500

3.630

408

-

1,110

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865

-

641

2,500

-

-

7.740

10.600

29.500

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82.100

7,740

49,000

20,600

623

6.03

-

12.5

11.0

8.99

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11.1

28.0

-

32.5

-

8.66

-

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25.6

23.56

18.2

30.4

11.7

15.0

51.6

18.1

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10 p.m

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7 a.m. 

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12 p.m. 

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May 23

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9 a.m. 

10 a.m. 

8 p.m. 

4 p.m. 

1:30 p.

m From floodmark.

n Site and datum then in use.

u Affected by regulation.

w Revised.

z Small dam above station fai

y Bureau of Heclemntlon gage.
284 FLOODS OF MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

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a o P. 3 »
286 FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

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151

152

153

154 Saloon Creek at Okanogan, tfa*h. 

MfitHOW BIVXH BASIH

155 Methow River near Tentura, Wash.

156 Methow Btver near Winthrop, Wash. 

Methow River at Twlcp, Wash.

Toats Coulee Creek mear Loonis, Wash. 

Salaoa Creek above Conconully, Wash.

Salaon Creek below Coaeonully, Wash.

Chevaek Creek above Boulder Creek, mear

near Winthrop, Wash. 

Chewack Creek at Winthrop. Wash.

157

158 Methow River near Pateros, Wash

159

160

161

162

163

164

165

166

167

168

169

T»isp Rivar at Xwiep,

Halny Creek near Methow, Wash.

CHJSLAB BITER BASIH 

Stehefcin River at Stehekin, Wash. 

Chelen River at Chelan, Wash. 

Ballroad Creek at Lucerne, Wash. 

Prince Creek near Lucerne, Wash.

Twenty-five Nile Creek near 25-«ile ranger 

station, Wash.

EHIIAT HITCH BASIH 

Xntiat River near Brief, Wash. 

Sntiat River near Xntlat, Wash.

170 Mad River near Ardenroir, Wash.

h Mean daily discharge.

m From floodmark.

n Site and datum then in use.

u Affected by regulation.

ac Observed.

132

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126

170

58

1,020

1.330

1.796

390

548

248

6.6

372

950

64

35

39

207

417

87

1920-26

-

1910-22

1903-12

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1912

1919-29,

1903-20

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1912-13

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1910-15.

1927-48

1903-48

1910-13.

1927-48

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1910-25

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June 3, 1922

-

July 20-82, 1921

Apr. 29, 1904

-

May 1912

May 26, 1942

May 11, 1910

-

June 1913

-

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June 2. 1936

June 3, 1936

June 8, 1927

-

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June 17, 1916

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10.76

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27.18

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21,300

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2 p.B. M

2 a.B. M

May 30

May 28

ad floods of December 1933 and April 1938 reached stages

of 79.47 and 78.16 feet respectively, 

ae 1*31 square miles prior to Oct. 1, 1945. 

af E6.0 square miles prior to Apr. 17, 1948. 

ag from drainage area of 971 square miles.
288 FLOODS OF MAY-JUKE 1948 IS COLUMBIA RIVER BASIN

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SUMMARY OF FLOOD STAGES AND DISCHARGES 289

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BUM
290 J-LOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

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SUMMARY OF FLOOD STAGES AND DISCHARGES 291

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E4G4G4G4HP* PQ Pi i/1 W ^

in VD r*tOOAOfH<MK\J±lOVD r* !-- CO »»»*****«« « «
292 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

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1

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during Mi IB Discharge (iec.-ft.)

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SUMMARY OF FLOOD STAGES AND DISCHARGES

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S S g d cu cu cu eu 4 a a A * * *
294 FLOODS OP MAY-JUNE 1948 BT COLUMBIA RIVER BASIN

Inued harge* Cont 

3

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Method ofdetermination

J .

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ad

is

4» -S

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Data andhour

4» a

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2

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BASIS Continued SHAUi BIVjiB Continued Boi*easin, Hirer

Moore Creek Idaho Arrowrock, near 

V

K S

« 1

3 & 1T> IT\

S? 1

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a 8

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P\ c\

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in

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2 1

BO e>P 1

SI 8 0- r^

Baaln Malheur Hirr

Blrer Dreweey, Malheur Oreg. near 

Blrer Malheur belowWaraapringe Beeerroir, 

Rlrer*ide, Oreg. aear 

* eo

CM CM

ni

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 $

w

ift i-t

1 

a

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Blrer Malheur Hope, Oreg. near 

S

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£

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a 

to

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nj

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Horth Trk Malheur Rive abore Agency Valley Recerroir, Beulah, Oreg. near 

S

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*"*

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to art ift ir\

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Horth Trk Malheur Blr Beulah, at Oreg. 

Creek Vale, BulyOreg. near 

Payette Blreraaln

8? cu

 » to \O Ift ON O U

r-t (J\ tO \O

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- 7 V §

P 51 S S

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BO *O BO V0 

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* £ ! !

South TorkPayette Hirer Lowman, Idaho at 

South Tork Payette Blrer Gaden Valley, near 

Idaho 

South Tork Payette Hirer Bank*, Idaoo near Blrer Faytte Horeeehoe Bend, Idaho near 

s a1 a- $

S 1

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Birer Paytte Snaet, Idaho near Fayette Hirer Idaho Payette, near 

$ 8?

M> W O

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Clear Lowoan, Idaho Creek at

Deadwood Hirer below Reeerroir, near 

Idaho Lownan, 

Deadwood Blrer toman, Idaho near 

a- 8 §,
301

302

303

30U

305

306

307

308

309

310

3H

312

313

31>*

315

316

317

318

319

Horth rork Fayette River at MeCall, Idaho

Horth rork Payette Hirer at Cascada, Idaho

Horth Fork Fayette River near Bankt, Idaho

Jtake rork Fayette River above Jumbo Creek,

hear MeCall, Idaho

Lake rork Fayette River below Lake Irrigation

Diatrict Canal, near MeCall, Idaho

Weiter River Basin

Weiaer River at Tamarack, Idaho

Weiter River at Starkey, Idaho

Weiaer River near Council, Idaho

Weiter River near Cambridge, Idaho

Weiter River above Crane Creek, near Weiaer,

Idaho

Weat rork Ueieer River near rruitvale.

Idaho

Lott Creek near Tamarack, Idaho

Johnaon Creek below Johnaon Fark, near Council

Idaho

Little tfeiaer River near Indian Valley, Idaho

Crane Creek near Midvale, Idaho

Crane Creek at mouth near Weiaer, Idaho

Mann Creek near Weiaer, Idaho

Monroe Creek above Sheep Creek, near

Weiaer, Idaho

a'rrom floodaark. ah Affected \

14U

626

933

48.9

_

36.5

106

390

605

1.160

78

29.1*

86.5

5

81.9

242

288

56

_

y bacfcva

1908-17,

19>*l-48

bg!941-

19U7-48

1945-48

1940-48

1936-48

1920,

1939^8

1937-48

1939-^8

1920-1+8

1910-13,

1919-25,

1937-48

1910-14,

1920-21,

1924-48

1919-21, 

1937-*8

1920-21,

1923-27.

1938-48

1910-16.

1924-48

1920-48

1911-13,

1920,

1945-1*8

June 10. 1933

May 10, 19>»7

June 3, 19>»3

May 7. 19*7

May 9. 1947

Mar. 27, 1940

Mar. 27, 1940

Mar. 16 or 17.

1938

Mar. 31, 1940

Mar. 19, 1932

Mar. 31, 1940

May 17. 18,

1921

May 1 1938

May 30, 19>*5

Feb. U, 1925

Dec. 3, 1910

Feb. 7, 1925

Mar. 27. 1940

Mar. 18. 19,

1946

7.5

6.29

10.70

8.19

6.39

6.00

6.00

m,ni7.6

8.30

mlO.8

n3.79

4.29

3.00

nU.19

8.9

6.80

rn.n5.t5

2.40

4.260

7,320

9.110

1.570

ul.520

775

bi2,450

bj6,700

6.670

bkl6,900

1.170

u688

1,380

w201

wl,840

4,240

"8,350

bnl.540

ah!70

29.6

11.7

9.76

32.1

_

a. 2

23.1

17.2

11.0

14.6

15.0

23. 4

16.0

40.2

22.5

17.5

8.16

27.5

_

9 m.m. 

9 a.m. 

1 p.m. 

10 a.«

6 p.m. 

4 p.m. 

11 a.m

6 to 9 

5OO p

12 p.m

May 19

8130 a

6 p.m. 

1*130 a

7»30 p

12101 

4I30 p

3 p.m. 

May 19

8 a.m. 

er. bh From rating curve extended 

n Site and datun then in use, 

u Affected by regulation, 

w Revised.

be Higher atagea hare resulted from ice Jan*, 

bg 191*1-47 at aite near Smith Ferry, 12 oilea 

upatream; drainage area, 893 square milet.

bi From rating curve extended 

bj from rating curve extended 

bk Fron rating curve extended 
296 FLOODS OP HAY-JUNE 1948 IN COLUMBIA RIVER BASIN

I

y

jj

1

§

5

5

1

 8

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1

St

1

£

Method ofdetemination

4» .

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n

K

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sj

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A

i

H

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|,8

1

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h

Vi e

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5 <*

and ofplace determination

9

4* 

EQ

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 H ir\ ni K* r«i o\ .st w r*-r 9Oir\niAiir\vor r*.

rH -H ft* ^

| 8 S S 5 S II Sll&tli&ivf

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CU V0 f1 VO > VD CU r4 l"~ A Al O O in * ^ (SvavoJh o O ojelVctt^r^aK ir. 5^ 5 

j» vovavnjt 1 (0 r-1 jtiAeAwr^r^'rAnl^

5 t "

Sg^sf ~s ? " I i I * 1*-1

". 1-41' ^1 11 -8 4 ? 4 * * t

a* a IB~ a ! e B =» B! » B! B 8? * a 5cx

> p. *«& « « «5°is!S?5 §§

3 K\ °^S cu Sjt cr\rtS?»!H>r.5rlcr\ s£ if

tO rl N ^ O VD r-l 10 r-l r^ VD (T. tOin 

rH ONJ^JO^ I^»VO OK\tntOK\VO JfinM

iH I?

o p o o o o o J- p o o o o 9901

ni gji-ltOvO Jt O VOMOOOO OQrl n^ to^ti-icui >t\ jt voooinj»vo nSvo

O) iH J- rHin U\tOOVOVo'p~IO 

9 0> rl iH rl VO 10

vp unin o S^ r S O K\ S r (y ro

j» i^rAvocu 1 r^vo jt toinr Ortin

r-T o'-tfNj-* 1 rf . . i^! r-^ . o . 1H ..

|H Qjrtrlr* >Kk OWKjOrOl-CTirt

i i 1 i i 11 1 1 1 i i ill

o to jf'to to to jt'to to to to to to to ^i to to to r-^to to si X13 1x3' fi Il^lilvl.J sil

rH iH t-iMflrHr-lf-l rH »H *H i-l iH >H iH rH tHvHt-lvH

£ a>SS*! * g ^R|| &IS§«

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L r a ? . i * '- 3 1 . i 1 i i 1 . i '- « 1 I

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m « h h i, CO hooi.3fc.ooS CO 0«l«««l . J3 jq 

«5C

3fi ^° 1 ! i s J 3 I 1 | | 3 5 1 2 | I | I 1 -|

alsl3 3s * * i 1 * * * i - 1 8 s : H. « 1 J i * i :a ? l-ls^^s^isasl g*|Ii;US§| 3S3J?8S283S3SSJ

| aaa|8 f a « as a o a a a a a a ^

g aa»-as ^sr s$&as<R-3,£££
STJMMARY OP FLOOD STAGES AND DISCHARGES 297

i*- ft

O Q CT> <S fii si

O r in cr*

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C X

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1 J

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fi i-i

Creek Stanley, Idaho atLey 

fork SalmonBiTer Clayton, Ice* near 

i r

no ' cr,

.=;

no

O

a

VO

0 

4*

CU

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s

& 

cu

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 J

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June 3 

1*0 May 2710! p.m. Frobably My28 Frobably My28

in o CM

00 t 1 

o o p

i-l VO O

o in i o

 » *£ ^° <S> fi 

 i » 

O fl

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ON

I 1 1

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t <Tv ni v£>

Creek Big Creek, Idaho near 

th Tork SalmonBiTer Euox, Idaho near 

fork SalmonKrasgel th BiTer atranger 

Idaho ation. 

bh fork Salmon BiTer Idabo Wrren, near 

M g g «g 

ca OT a? &

3 * % 5"

1

1

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0 0

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£

in

Frobably My28 

27May 11 p.m. 

^

SI

o 

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ON

i

eo

'1

t 

Fork forSouthalmon RiTer mouth, b at

Tellov Fine, Idaho lar

Creek Landmark ttation, near nonranger 

iabo

rr

no crv

Si

1

g

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Creek Tellov Idabo Fine, at non

4&

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 a

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BiTerurgdorf, Idaho ss near 

s

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s : i ^ f> 0 A 

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no

in en o in & u in ft fi in

Creek Schissler Creek, belov ren near 

Idabo urren, 

Bound Valley tie Salmon BiTer above

Hev IdahoMeadov*, reek,near 

Salmon BiTer2miles abovemouth, ble 

Rigging, Idaho sar

Creek Tamarack, Idaho near 

K a f o «» a« 

 S .» 5 fJ *s fl 381

K\ 4 m >-D m tn in in

S S S

888

ft C«J K\

Frobably May29

About June 1

May 22

i i i

i i i

no 

1

S* ' ' '

3N

S

r \O 

CM OS fl fl

below Shingle Ld Biver Creek, nar 

Idaho >llock, 

Creek, Idaho Creek Slate benear Idaho lebird Creek Whitbird, at BondeiTer Basin Orande 

ra i

In in in

0

 a,

 I

7 |

5

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May 3<30 28a.m. 

above extended 11, ve

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in |8

iss

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in

fi 

1

no

f

Bonde Kilgard, ide RivrOreg. near 

floodmark. i

then anddatum inuse.i 

icted by regulation, 

proximate.

s sssf S *»:j

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298 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

1

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o o h q o

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r» (^* tf\ O QO i*\

r-l <M 01 W iH K\

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Q O O O O 

Q O O O O

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1 &j s s 0 '

w fx7 «7 Ri

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5 3 j» to i^ s

r*\ r** M w

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in i-i

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£5 §

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M to to to 3 , i i i ,

i-l r4 <-l ' fH

S S &^ § K t

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" tolls' i v ! 13 ;. i

k o M a

 <S » . 4 S 3

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£ t^.. * 1 1 53

|"J! 1 5 S 1 a ..a a s j>.

ini^ i i *|

5 5 5 3 o i

cu K\ j^ in vo r*-
SUMMARY OF FLOOD STAGES AND DISCHARGES

^

8?

S

t^

s

17

1

a

o 

urt

ir\

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« 

1

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R -S

« «

lf\ K\

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8

fll ir»

1 »'

! ill.

s. & s & & - | & 8-

Mvo>Hi^ir\i^eooiw

tf\jd- eocnr ir\oi.4- Kk

>Hr4r4v» OIWO|M>K\

JSSctJiSsi

v£ cvi K\tf\r*-f*-irvr«>j* H 01 M-i in ft ft

g. 2 e

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5 ; l & ; ^ * ° «. & ° ^

fta'SfSS o?*!S«

i : 1 1 ~ 1 1 i !

J» to O

' fi ' ' cA ' ft ' '

O 4> 

1 |

0

r- '

g § §

f^- K\ ft

R &

0 ' J

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a 1 1

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^.

toft

s

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3

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1

8

VO

to

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cr.

ir\

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a

CVJ

vo

&

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cr. 

1

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cr.

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cr\

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1

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8

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1

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3

0

ft

to1

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r<*

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Locheaot Blver near 

to

K\

$

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1

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01 rt f^ vfi

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1 i & & 

s. fi

fork Crooked mouti at

Idaho ettin, 

South IbrkClearwatel 

Idaho

S 8

K^ Kk

r 

cr>

01

' £

1

, 5j

o>cr>

* VS

fH

«4

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*l

3 i ft 0

 § iJa

lark South Clearwatel Creek, ttolden, near fork South Clearwatel 

Idaho

£ 81 >»\ t^

i

,

R

,

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c

Creek Oi Orof Inoaear 

S

K\

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cr.

7

i 

1

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S M 5 fc * 2 a*4,

*3* a-a

lorth forkClearwatel Bungalow ranccnear 

lorth York Clearwatel

3 & f\ t^

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to ?

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1

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s

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r^ nj

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si » j 35 ."* lei

h h b

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Idi Ion, tat ranger e lorth YorkClearwatel & North York, near lorth YorkClearwatel

$ & K\ K%

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8

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rn

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Kelly Creek nouth a 

S >^

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01 s

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7 

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Idaho etation, 

Fork CliLittle lorth He«do.uartere, near Kei Creek Fotlateh a

S & f\ r^

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Lapwi Lpwal Creek atMletlon »1 Creek nar 

VALLA WALLJ

cr. en

f^ K\

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ft ft

*\

8

fH

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h

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$

i

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s & vo J-j

i. £

2! S

1 1

to r-T «

1 i?i?s

5- *'

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i i

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5 .

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5 ,. 3 i

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1! £

s s

I 1

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w, a

< i

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5 3 1* 

-. 1

1 1 0 0

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J* K\

£ !&

J«

55

1 1

!i

4 J! : 3

? ^

Tellowhawk Creekat 1Creek Oarrieon at.Wal

R i

£

UT\

40

«

2

!*

0,

!

!!

Tork £aetlouchet Bit 

From floodmark. 

then 1Siteand datua 

Beriied. Obterred. : 

§ B ° * *
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

1*»

1

s

 el 

1

1

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0

1

fr

o 

1

«J

f

§

*

1

1

5

1

S

i

1

I

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4

1

< 

i

c

c

a

Method ofdetermination

V b "a

2"C

8S

Si

8,1,? * -H <D

3

3

1 

1

«

1

« *

,

°] 5

i« ;<*-» o 

o o

8

'I*

8* 

 »

Stream andplace of determination

si

BIVJtB WALLA VALLA BASIH Uontinued

jil,

S OON 8 3 3 £ 3 £

ro 5-0 in nj ko m nj g o

CM iH O BO

O go OOpOOiHO O 

T> f\ ON ^ o <-< tS t~ S ni i-«

a S & 8 ft K 3 ?- 2. '-* *$ * w

a 3

? o 3 §

o p.5 *^^°S's»a a 

a t-<eo <-<«>ir>ni«>:KPi (i

IT\ CVJ iH K\ iH

8 SSili^II, ,

SO JJ OON^^..

o- * S1 oo^^SSN

o QOQO ir\ 1-1 o J- >*o r 

 ^. O^ ^.^ O> O\ ysvs^S^-ai O O K*\ ON O\ w\

MS* eu* oT - cT ON w»* i i

i i i 1 1 i i i i

00 00 CU *QO 00 QO 50 50 K\ BO 50 ^ ^ Tltrv^'^' ^ 'T*? n''?'^'

<M IO 

^» to

r7 <\T

'. . II i 1 ? . I i * f s s , (D 91 O O U) Oh O -** « » 

» i-« * O S^O 0> S U <8 » (1) cq ^

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»3«8 0 H ? J 0 0 *

H Tj ; J a s ; 3 j| i| |

Sllol ||j-r^*«-2^°"

1 I 1 ! i I ! ! 1 1 I s I s

| f| flflfl^ 3

S.O If<*» 0

sl

V 

 O «4

S ^8

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3 K-V

^ O ir\ oj o o

s? s?

S ii SS1 »

in tA in o5>

to

& S?

 -» ^» a j- * P.

Pi Pi rH ON a CM

fi S ?>

vO K\ lf> 10

O O Q Q 

m o o o

II lf> O ON W

ni ni

,4 « a |

(M (M (M (M

KJ KJ KJ 2! ON ON ON ON 

II ON ON ON O*

1 1 1 1

r4 iH iH M

O J

1^ IO iH O Q Q 

rJ OJ (^ J* *> 55 ni ta o ir> 

 H" in i-^

Black Horse Lexington, Creek Org. near Black Boree Creek Lexington, at Oreg. HlViia BASIS JOHN DATJohn Day Elver Prairie atCiy, Oreg. John Day River Picture Oorg*, at near 

Dayville, Oreg. 

John Biver Day Service Creek, at Oreg. John Day Biver McDonald Jerry, at Oreg.

W\ Jt KN VC t «O
SUMMARY OP FLOOD STAGES AMD DISCHARGES

1

_

s -

Ol Q 

r^ S

CO '

to1 '

ir\

CO

o

5 

ON 

I

rH

01

U

above Strawberry Slide Creekreek, 

Frairie City, Oreg.near 

John Canyonreek Day, Oreg. near 

3 S

8

Ol 

UN VO

UN UN

» S

KN W

to

s

SPsi 

a

Pk

o

g

1 SN-a*

SN 

2?

i

rH

IS

lork JhnBiverayville, Sonth Day near 

Oreg. 

John frk Day Biver Dale, Horth Oreg. near 

Ol QJ

£

w

8rH

a

\0

^

Si

1

a

S

w

1

w

 rH

Ol

S

 H

 H

1

ON

!

fork Jhn Day Biver HorthMonument, at Oreg.

F

g

ON

o

"

wto

3

1

a 

a 

to

*

ON

§

UN

 *

1 

1

e

-a

§

01

£

CO

Ol 1

a

-a

S

IV.

S

to

*~

CM 

r-t 

ON

HI

3

ro

 s

iri

fork JhnBiver Middle Day Bitter, Oreg. at 

f

S

H

8

' W

*"1

*

Si1-a

a

01

o

90

§

UN

^*

ni 

1

to

SN

*

8

i

u

toni

^

»

S

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1

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1

rH 

rH

Khirtynile Creekondon belowCanyon, near 

Condon, Oreg.

Ja7

I

5

S

>

i

i

i

'

i

3

Creek mouth, Creek, Bock atOreg. near 

BBSCHUTSS BIVXRASIB

1

, ? ,

tO g, O

of

ft R £

rH rH r»N

O B 

0 *

a £-"

: illl

S

rH 1A

Ol J

& 1"1 01 cu" 

5« >» SB

'

o

8

*

i^>

o

rH

1

1

&

to

8

r*t rH Ol O Ol Ol Ol 

rH rH rH rH rH rH rH

 i 

Biver SnowDeeehutee below Creek, nar 

Lapine, Oreg.

Biver CraaeDesehutee aFrairie, near 

Oreg. Lapine, 

Deechutee Biverenham falls, at near 

Bend, Oreg.

ON O rH

1

Biver Deechutee Madras, Oreg. near 

01

CO Ol 

ON CO

to

1*

3 S

# rH

1 OJ

* 2 2

UN

-s o

rH

C tQ

\j5 ^p

KN

-S

Ol KN

0 rH

0? ^.

- <3 

1 I

ONWJ-" 

ONJS- rH

OX O rH 

rH rH rH

S

ON r*%

eT

Desehutee Bivergge, Moodyat Oreg. near 

Creek Ceecent, Odell Oreg. near 

^ .a

K% KN ^ ^

«o

3

«

' H

KN

O

rH

KN

CU

rH

ON

*

0

E

*

to

a

III

1TN

Tunalo Bend, Creek Org. near 

to

*

i i 

f

0

-TN

 »

P.

ON

Jj

0 

iH

tfN 1

I1*. 1 W I a

S

rt

of

5-

 *

i

a

V

Ol

S1

^vg

^to

of .ao"

Ol Ol CU

SB 3 A

cn en

to

?

o

B

 MCO

1 

*

o

 o5"

1

S

of

Crooked Biver Fot, Oreg. near 

J?

cu

rt

8

to

m

oi 

1

«

o?

«

ON

^

a

0

en

13 

r^\O XrH.

o 

of

Bof CrokedBiver Dan, nbove foannear 

Frineville, Oreg.

w

*

!

iA

sr 

1

a

to

^

t 

w

o

l< 

0

5

IIrH rH

0

-a"R

Biver Crooked Culver, Oreg. near 

J?

e

rS

1

8!"

w

""I" gN

1 J 

a A

fi |

s i

O CO 

rH-" 3

g i

~ I i 

1 i!

bo. Estimate br Maximum 

Jingine 

Maximum Dw 

<N

fromloodaark. m

Site and datum theninn ue. 

Affected by regulation, u 

Bevised. w 

Obeerved. ac 
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

I 

![

0

3 

1

|

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e

c

Vl

0

11

1

K\

0 

1

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i-l

|

i i

i

i

I

*

i1

i

0

I

i

si

Method ofdetermination

*» 

1**

Discharge -ft.) (see. 

*»~

if«

Bate and hour

4» 

I 1 *

h *>' S **

Ij

*~

JJ^'

1

, T3

*H 0

0 

JH

I 

OJ 0*

.t

 H *»

S

4»

IS 

0

1

1

I

si

VD

0

o

I

s

8

o

o 

o

8

8

VD

s

V,

to

Ol

1

I

»

USCHUIBS BASIN BIVBE Continued Bearer Oreefc Paulina, cfc Oreg. near 

m South I'D

I

R S

ni vo

S\ S 

crv ^

$ &

r«l r«l

C9 CU 

1 1

a a

A «

 H >0

d cu

O CTv

~*

o cu o>

o in

in in

F-l a" a"

0 0

s s

% s

f °

reek Paulina, Oreg.near 

Bearer rfc Creefc Paulina, Oreg. near 

Bearer CNorth fo

1 1

to cr. 1^1 h- r*-v <y\

;* f in

O O O

VD in cu

to in - o

CTV K\ CT\

Ol VD

ma 

: a

 » *j 3

* 1 8

cu cu 

to 

o to to

§

O Q 

00 CO

cu cu in

f CU CU 

r4 in m

S * 8

r-* S n114

50 50 &o

"^ a

Crooked rfcHirer Deep Crek, abore 

Oreg. ralina, 

Crooked HirerDeep Crek, rk below 

rallna, Oreg.

Birer Qrandrlev, Oreg. near 

sisil S fl S fl ti

a a x

f I f

® EA

^ "3

i-l

(*» I* 

CU rr\

I 1

a a 

A A 

o o

i>- in

1 1

m

tO K\ in ^

ni vc

m vo

S\ ^ 1-1 1-1

o in 1-1 1-1

4 1

III

in

 H

Sieters, Oreg. ik near Wapinitia, Oreg. near rr

Cre< Lake Hii White 

I £

It S

§

60 80 

cu*

o m in rr\

in cu

« t

i i i'»

R 4

s s

!H

« 8

hj r«l

s I1

 in

VO i-l

4 1

no to

m »

below Tygh Valley, Oreg. rer 

>ek Qorrnnent Camp, Oreg. near 

PIPUiiaiklLi CEUi£ BASIN

 & 5

£ 2 

S 3

I f

1

^3> *-»

r-r\ r^

83

S

K\ 

01

in m

If

a «

1 i

S '

t ,

 S» K

VO ^

to i 

1-1 1-1

4 4

CO CO

s *

Creek lWrenthan, Oreg. near 

Creek Boyd, Oreg.near )KLICKITAl BIVX8 BASIN

1 3 

Z 4

S 3

O i-l

in *

S «

!!

00 O

cu o

 * *~

Kr

P< B 

^? i-l

' '

O O

n Eo- i-i 0>

toni o>

vo ?% 

"$\ 2

r* cu

1 I

to to

in vo

Hirer abore Westfork, t near 

Wash. >d. 

Eirer Olenwood, Wash. t near 

Kliekita 01 envoiKliekita

CU Ht

to cu

in «o

VD 00 85 in

S Sf

f- ^

* a

i i

§

Q W i-l

RJ rf 

8

^ 8<

yj «

g |

a «

1 1

lid

1-1*

Hirer Pitt, Wash, tnear

Klickitat Hirer Olenwood, c near 

5 I; 3 * 

I1 J>

* * S

IT* «-» cH

Q ON cu

1 " ?

in o i- i"- vo in

^ cu m

a a * * . o

Pi « CO

i I i

O O 0 crv vo ^ Si vB vjo

" " ?

R IR 8

£ in o>

I i-l **ON i-l 

 - VO CU

** Q o

s 4 a

I 00*00 no to

in

Creek Olenwood, Wash. rnear

Liefcitat Eirer Ooldendale, Wash. near

Liefcitat EirerVahlciacus, Wash near 

inttf +» +»

VD r eo
SUMMARY OP FLOOD STAGES AND DISCHARGES 303

g

o

Rr

nT

S

1

a

A

8

§

*

a

1

«j

a

1<T\

S

BASIB HOODBITXB Hood Biver, Bver Oreg. near 

a\

to

o

fl

to

i

a

A

»

I

ni

ni

5?

 H

Si

1

II

*

Tcrk HoodWeet BivrDee, Oreg. near WHISK BITJSBASI SAUtOH 

O

2

s

o

a

'

I

ON

*£

h-

$

1

0*10

 H KN

*

Underwood, Salmon BiverWaah. Wiite nearLITtLS WHITS BITJJBASIJi SALHOH 

£

S

S

3

in

1

a

o

'

1

8

"~

I

*-"

s

u

i

d

1

1

5 

I

4* 

4*

ni 

SP

S

p:

P

1

a

rt

i

5r*

"*

to

<T\

I

in

1

00 S

rH r-l

Little Salmon White BiverWillard, Waah. at

WIHD BITXBASU

*

!?

o 

fl

81

VJ3 

1

A

'

i

to

 3

1

to"

.0

i

5

Trout Ceek Wind Biver above Carson, near 

Waah.

3

"

1

in

1

A

in

I

8

<j>

o

£j

r 

8?

1

1

S

ie"

h

O 

*

3

»

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 +

1

<*o f\

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1

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iu

0

«- 

2

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«

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to in

P.

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1^

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f

 ^

s

i

i

Trout OreekCaraon, Wah. near 

^9

 +

R

K

1

A

1

&

ni

in

f-4

^

1

0

Caraon, Panther Creek Waah. nearSAHDT BITXBASIB

to *£

"

f.

j-o

i

A

3

1

a5

8

«r

9

3M

*

Sandy Biver Marmot, Oreg. near 

a\

f

r-l M

O VO

» 3 to*

Si S

«0 

K\ (M

1 1

A a

5k i

o o

to in

VO ^

8 -

i §

!* 8J

i i

o to

Biver, Sandy Biver below Bulln near 

Oreg. Bulln,

Salmon Biver Government Camp, Oreg. near 

0 r-l

"

S

s

ni 

1

jr 

in

o

S

 *

ti

r-l 

r-l

r-4

1

i

*

o

&

CM

fH

0

m

8

P, 

w

2

S

1i*»

S

<T> 

C

 H 

 H

«H

1

ON <T\C

»H »H » 

S

Boulder Creek, Salmon Biver above near 

Brightwood, Oreg.

P

r^t ni

S

o S ru n

nT M"

Si S

c

' ;

p. x

a A

to ni

s o!

8 -4 VO1

IH ni

5 «,

« »

C

M iH

^ S,

1 1

K! .nl j w ON ftON SO

* a.

Bulliver Lake Morrow Bunbelow Ben 

Beaervoir, Oreg.

Biverun, Bll flun Oreg. near 

 ?. s

SP3j

!

1

ni

1

K\

to

<T\

1

S

1.

'II

s?

i0

i

r-4 i

I 

s

 H

£

I

i

l-feet. 

Biver nea

S 1

 r-i § i

itended abovebeen greater f records for

1-

.*** Mi* h&

III! ^5^5

Elevation abovelevel. meansa 

from floodmark. 

Site then anddatum inuse. 

Affected regulation. by

Obaerved. : 

vi a a a a
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

2 i

a

y

1

i

tt

1

%

1

0 r-l

1

to

"

I

I

1

g

Jo

Pi

1

1

1

a

a

V 

Vl

+» .

1 rl 8

I s-?

Discharge (sec. -ft.)

^Ss *5i

5

1V

Vl -H

1**

§2

0 0

a a

&is

%

1

v.1

o

'j3

Sj

a

49

g 

 o

Vl

§

 3.

1

b

1? 1

ON

S

i

toi

s

1

s]

p.

0

,

I

1

8

"

I

r-T 

r-l

1

CO

8

VASBOUOAL BIVKR BASIN Washougal Biver Vashougal, Wash. near WILLAMItm BIMH BASIN

51

*

VO

8

R?

1 

P.

cu

10

S*

§

?

in

o

»

S

VO, ^

§

Elver Willamette Salem, Org. at 

BO

Jt

to

o 51

t2 cu

<T> CO

it

d X 

"* a

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test Hirer Vork Lewis Heisson, Wah. near 

KALAMA EIVJSH BASIN

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SUMMARY OF FLOOD STAGES AMD DISCHARGES 305

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306 FLOODS OF MAY-JtTNE 1948 IN COLUMBIA RIVER BASIN

FLOOD-CREST STAGES

Records of flood-crest stages were collected by the Corps of Engineers. Field 

surveys were not completed at the time of preparation of this report; however, all 

records already collected were made available to the Gteological Survey. These data, 

together with a few observations by other agencies, are given in table 4. Such 

records are of special interest in presenting a limiting factor with respect to future 

developments along rivers and in furnishing basic information as to velocity of 

transmission of flood crests, valley or channel storage, the effects of natural or 

artificial channel constrictions, and other aspects of river behavior.

The table describes the observation points by reference to local features measured 

along the banks and river distances above the mouth. The date and time of crest are 

given where known and the elevation of the crest at the observation point. It has been 

found that the crests of floods within the building limits of cities and towns and at 

other places more or less distant from a river may be materially different from those 

along the main river channel, as a result of various factors. Consequently, 

inconsistencies may occasionally appear to exist between local information and the 

records herein published. Flood crests on opposite banks of a stream are frequently at 

different elevations owing to the effect of bends and obstructions in the channel.
FLOOD-CREST STAGES 307

Table 4. Flood-crest stages 

[furnished by Corps of Engineers except as noted)

Stream and location

COLUMBIA RIVER MAIN STEM

Columbia River:

Ringold Station, Wash.

Ringold, Wash., 1 mile below, left bank

Ringold, Wash., 2.1 miles below, left bank 

Ringold, Wash., 3.4 miles below, left bank

Byers Landing, Wash., 2.70 miles above, left bank 

Byers Landing, Wash., 0.90 mile above, left bank 

Byers Landing, Wash., 0.60 mile below, left bank 

Byers Landing, Wash., 2.50 miles below, left bank

Byers Landing, Wash., 4.8 miles, below, left bank

Byers Landing, Wash., 6.1 miles below, left bank

Merwin Ferry, Wash., 2.5 miles above, left bank

Merwin Ferry, Wash., 1.2 miles above, left bank

Merwin Ferry, Wash., slip, left bank

Merwin Ferry, Wash., 1.2 miles below, left bank

Merwin Ferry, Wash., 2.3 miles below, left bank

Highway bridge, 3.50 miles above, left bank

Highway bridge, 1.8 miles above, left bank 

Northern Pacific Ry. bridge, left bank

Snake River, 2.3 miles above mouth, left bank

Snake River, 0.8 mile above mouth of, left bank 

Oregon-Washington R. R. & Navigation Co. bridge,

0.1 mile below, left bank

Oregon-Washington R. R. & Navigation Co. bridge,

1.0 miles below, left bank 

Oregon-Washington R. R. & Navigation Co. bridge,

2.5 miles below, left bank

Atalia pumping station, 2.3 miles above, left bank 

Atalia pumping station, 1.0 mile above, left bank 

Walla Walla River mouth of, left bank 

Walla Walla River 0.4 mile below mouth, left bank

Walla Walla River 0.9 mile below mouth, left bank 

Walla Walla River 1.3 miles below mouth, left bank 

Walla Walla River 2.6 miles below mouth, left bank

Spring Gulch, mouth of, left bank 

Spring Gulch, 0.5 mile below mouth, left bank 

Spring Gulch, 1.0 mile below mouth, left bank 

Spring Gulch, 1.6 miles below mouth, left bank

Left bank

Left bank

Left bank ,_ ,

Juniper Canyon bridge, 1.9 miles above, left bank 

Juniper Canyon bridge, 1.0 mile above, left bank 

Juniper Canyon bridge, 0.5 mile above, left bank 

Juniper Canyon bridge, left bank 

Juniper Canyon bridge, 0.5 mile below, left bank 

Juniper Canyon bridge, 1.0 mile below, left bank 

Juniper Canyon bridge, 1-5 miles below, left bank 

Juniper Canyon bridge, 2.0 miles below, left bank 

Juniper Canyon bridge, 3.2 miles below, left bank 

Juniper Canyon bridge, 3.9 miles below, left bank

Cold Springs R. R. station, 0.6 miles above, left bank 

Cold Springs R. R. station, left bank 

Cold Springs, 0.7 mile below mouth, left bank 

Cold Springs, 2.3 miles below mouth, left bank 

Cold Springs, 2.7 miles below mouth, left bank 

McNary Dam, 3.9 miles above, left bank 

McNary Dam, 3.5 miles above, left bank

McNary Dam, 3.1 miles above, left bank 

McNary Dam, 2.5 miles above, head of Upper Umatilla

Rapids, left bank 

Upper Umatilla Rapids, left bank 

Upper Umatilla Rapids, foot of, left barik

Left bank

Lower Umatilla Rapids, left bank

Miles 

above 

mouth

353.6

352.6

351.5 

350.2

348.1 

346.3 

344.8 

343.0

340.7

339.4

338.4

337.1

335.9

334.7

333.6

331.5

329.8 

328.0

326.5

325.0 

323.1

323.3

320.7

318.4 

317.1 

313.7 

313.2

312.7 

313.3 

311.0

310.5 

310.0 

309.5 

308.9

308.4

307.9

307.4

307.0 

306.1 

305.6 

305.1 

304.6 

304.1 

303.6 

303.1 

301.9 

301.3

300.1 

399.5 

297.4 

296.6 

,296.2 

295.8 

295.4

395.0 

294.4

294.0 

293.6

292.7

Day 

and 

hour 

1948

June 12

12 pm

June 12

12 p.m.

June 12

4 pm

June 12

4 pm

June 13

4 pm or

May 31

4 am

May 30

9 pm

May 30 

10 pm

May 30 

11 pm

May 30 

13 pm

May 31 

1 am

Altitude 

in 

feet

376.5

373.7

371.2 

369.9

367.6 

365.3 

364.4 

361.9

359.6

358.5

356.9

355.4

353^5

351.8

350.8

347.9

346.2 

344.2

34l!s

335.7

332.0

339.3

327.1 

323.3 

319.1 

318.1

317.0 

316.6 

315.3

sisiz

313.9 

313.0

311-3

310.8

310.3,

309.8 

308.5 

308.3 

307.1 

306.3 

306.0 

305.4 

305.1 

304.9 

304.5

304.4 

301.3 

300.4 

296.2 

295.3 

294.1 

393.6

393.9 

390.5

389.3 

387.9

OQC COD *7/

OQC Q

COD 3
308 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Table 4. Flood-crest stages Continued

Stream and location

COLUMBIA RIVER MAIN STEM--Continued

Columbia River Continued

Lower Umatilla Rapids, left bank

Lower Umatilla Rapids, McNary Dam axis, left bank

Lower Umatilla Rapids, left bank

Umatilla. Oreg., left bank

Left bank

Umatilla, Oreg., staff gage at grain elevator

Umatilla River, bridge over mouth

Left bank 

Left bank 

Left bank 

Devels Bend Rapids, head of, left bank 

Devels Bend Rapids, middle of, left bank 

Left bank 

Devels Bend Rapids, foot of, left bank 

Left bank

Left bank 

Left bank 

Left bank

Irrigon, Oreg., left bank 

Left bank

Left bank

Left bank

Left bank

Left bank 

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank 

Left bank 

Left bank 

Left bank 

Coyote, Oreg., left bank 

Left bank

Left bank

Left bank

Left bank

Boardman, Oreg., left bank 

Left bank 

Left bank

Left bank

Left bank

Canoe Encampment Rapids, head of, left bank 

Canoe Encampment Rapids, left bank 

Canoe Encampment Rapids, middle of, left bank 

Canoe Encampment Rapids, foot of, left bank 

Left bank

Left bank

Castle Rock, Oreg. 

Left bank

Left bank

Left bank

Six Mile Canyon, mouth of, left bank 

Left bank

Left bank

Alderdale Perry, left bank 

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank 

Heppner Junction, Oreg., railroad bridge across

Willow Creek, left bank

Left bank

Left bank

Left bank 

Willows, Oreg., left bank 

Left bank

Left bank

Miles 

above 

mouth

292.2

291.8

291.2

290.2

289.5

289.3

288.5

288.1 

287.2 

286.6 

286.2 

285.6 

285.0 

284.5 

283.8

283.3 

282.8 

282.4

281.8 

281.2

280.7

280.1

279.6

279.1 

278.1

276.8

276.4

275.8

275.1

274.3

273.6

273.1 

272.8 

272.3 

271.8 

271.0 

270.5

270.0

269.5

269.1

268.5 

267.9 

267.2

266.8

266.4

265.9 

265.4 

264.8 

264.3 

263.7

262.7

262.2 

261.2

260.7

260.2

258.7 

258.3

257.9

256.9 

256.3

254.9

254.5

254.0

253.5

253.0 

252.5

252.0

251.5

251.0 

250.6 

250.0

249.4

Day 

and 

hour 

1948

May 31

2 am

May 31

3 am

May 31

4 am

May 31

5 am

May 31

6 am

May 31

7 am

Altitude 

in 

feet

a284.2

a280.0

278.8

278.6

277.7

b277.0

276.9

275.7 

274.4 

274.2 

273.3 

272.9 

270.9 

270.0 

269.4

268.2 

267.9 

266.8

266.3 

265.0

263 .4

263.0

262.2

261.8 

261.2

260.5

259.3

258.3

257.4

256.3

255.8

255.3 

254.6 

254.0 

253.4 

252.3 

251.2

250.8

249.4

248 .9

249.0 

247.4 

246.4

246.1

245 . 1

244 . 9 

244.3 

242.9 

242.5 

241.8

240.3

239.8 

239.1

239.0

237.8

236.1 

235.6

235.2

234.4 

233.5

232.0

231.7

230.9

230.1

229.3 

228.4

228. 0'

227.7

226 . 9 

226.7 

226.5

225.3

a Affected by McNary cofferdam.

b Furnished by U. S. Weather Bureau.
FLOOD-CREST STAGES

Table 4.--Flood-crest stages Continued

Stream and location

COLUMBIA RIVER MA.IH STEM Continued

Columbia River Continued

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Arlington, Oreg., mouth of Alkali Canyon, left bank

Left bank

Owyhee Rapids, head of, left bank

Owyhee Rapids, left bank

Owyhee Rapids, mouth of Jones Canyon, left bank

Owyhee Rapids, left bank

Owyhee Rapids, left bank

Owyhee Rapids, left bank

Left bank

Left bank

Lang Canyon, mouth of, left bank

Left bank

Blalock Rapids, head of, left bank

Left bank

Left bank

Blalock Rapids, left bank

Left bank

Blalock, Oreg., left bank

Four O'clock Rapids, head of, left bank

Four O'clock Rapids, left bank

Four O'clock Rapids, foot of, left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Rock Creek Rapids, left bank

Rock Creek Rapids, foot of, left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Squally Hook Rapids, left bank

Squally Hook Rapids, left bank

Squally Hook Rapids, foot of, left bank

Left bank

Left bank

Left bank

Indian Rapids, head of, left bank

Indian Rapids, foot of, left bank

Left bank

Left bank

John Day River, mouth of, Upper John Day Rapids,

left bank

Middle John Day Rapids, head of, left bank

Middle John Day Rapids, left bank

Left bank '

Lower John Day Rapids, left bank

Left bank

Schofleld Rapids, left bank

Left bank

Left bank

Qlrkllng Canyon, mouth of, left bank

Ruf us , Oreg .

Left bank

Left bank

Left bank

Left bank

Miles 

above 

mouth

249.0

248.6

248.2

247.5

247.0

246.5

246.0

245.6

245.0

244.4

243.8

243.3

242.8

242.2

241.6

241.3

240.9

240.4

239.9

239.4

238.9

238.5

237.9

237.3

236.9

236.3

235.9

235.3

234.9

234.4

233.9

233.4

233.0

232.4

231.9

231.4

230.9

230.5

230.0

229.5

229.0

228.4

227.9

227.3

226.8

226.4

225.9

224.9

224.5

224.0

223.5

222.8

222.2

221.7

221.2

220.6

220.2

219.7

219.1

218.5

217.9

217.5

217.0

216.5

216.0

215.5

215.1

214.6

214.1

213.6

213.0

212.6

212.1

211.6

211.1

Day 

and 

hour 

1948

May 31

8 am

May 31

9 am

May 31

10 am

May 31

11 am

May 31

Hoon

Altitude 

In 

feet

224.8

224.5

223.1

222.8

222.3

222.1

221.4

220.3

219.9

219.3

218.6

218.0

217.3

217.2

217.0

215.5

214.4

213.9

213.6

213.2

212.8

211.8

210.9

 210.5

209.9

209.1

208.3

208.1

207.6

206.6

206.5

206.2

205.8

205.5

205.2

204.2

203.5

203.3

202.9

201.9

201.2

200.0

199.9

199.5

198.6

197.0

195.7

194.3

193.5

192.5

191.9

190.7

188.9

188.7

188.4

187.0

186.6

185.4

184.3

183.9

183.1

182.7

179.9

179.3

178.9

177.4

176.9

176.2

175.4

174.5

174.0

173.2

173.0

172.4

171.7
310 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Table 4. Flood-crest stages Continued

Stream and location

COLUMBIA RIVER MAIN STEM Continued

Columbia River Continued

Left bank

Grant, Oreg., staff gage at gaglng-cable tower,

left bank

Grant, Oreg., at ferry landing, left bank

Left bank

Left bank

Spanish Hollow, mouth of, left bank

Biggs Rapids, head of, left bank

Biggs Rapids, left bank

Biggs Rapids, foot of, left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Left bank

Deschutes River, mouth of, left bank

Left bank

Left bank

Left bank

Left bank

Celllo, Oreg., Geological Survey gage, left bank

Celllo, Oreg.,. from recorder graph, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celilo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celllo Canal, left bank

The Dalles-Celilo Canal, left bank

The Dalles-Celilo Canal, left bank

The Dalles, Oreg., staff gage, left bank

Grandalles, Wash., right bank

Left bank

Left bank

Left bank

Right bank

Rowena, Oreg., left bank

Lyle , Wash . , right bank

Left bank

Left bank

Mosler, Oreg., left bank

Mosler Creek, mouth of, left bank

Left bank

Hood River, White Salmon Bridge, left bank

Left bank

Left bank

Mitchell Point, Oreg., left bank

Across Columbia River from Cooks, Wash., left bank

Left bank

Llndsey Creek, (backwater), mouth of, left bank

Left bank

Left bank

Herman Creek, mouth of, left bank

Cascade Locks , Oreg . , left bank

Eagle Creek, mouth of, left bank

Bonnevllle Dam, powerhouse, forebay, left bank

Miles 

above 

mouth

210.6

210.3

210.1

209.7

209.1

208.6

208.1

207.4

206.9

206.0

205.7

205.3

204.9

204.6

204.2

203.8

203.4

203.1

202.7

202.1

201.5

201.1

201.1

200.9

200.5

200.0

199.5

198.9

198.5

198.0

197.5

197.0

196.5

195.9

195.4

194.9

189.3

189.0

187.8

185.8

183.7

183.7

181.1

180.4

177.9

176.2

174.7

173.4

171.0

169.5

167.6

165.1

163.6

161.5

159.9

158.6

156.5

152.5

150.8

148.9

146.1

145.3

Day 

and 

hour 

1948

May 31

1 pm

May 31

2 pm

May 31

2 pm

May 31

1:30, 3,

6:30 pm

May 31

6:30 pm

May 31

3 pm

June 2

6 pm

May 29

12 pm

June 2

3 to 6 pm

May 21,23,

24,25,26,

27

May 21,23,

24,25,26,

27

Altitude 

In 

feet

171.3

C170.3

170.1

169.8

168.8

167.8

167.5

167.1

166.7

165.9

165.6

164.4

163 .«

162.2

161.7

161.2

159.5

159.0

157.9

157.0

155.8

154.5

154.56

154.5

153.8

152.4

150.9

149.8

149.2

148.4

147.7

146.8

146.5

146.1

146.1

145.7

98.71

98.0

96.9

95.3

94.2

95.8

94.5

94.8

93.4

91.8

91.7

91.5

90.7

91.0

89.9

89.3

 88.9

88.5

87.9

' 87.8

87.4

86.7

87.7

88.1

83.0

82.50

c Observed by Geological Survey.

Note.- Stage between river miles 189.3 and 145.3 affected by backwater from 

Bonnevllle Dam.
FLOOD-CREST STAGES 311

Table 4. Flood-crest stages Continued

Stream and location

COLUMBIA RIVER MAIN STEM Continued

Columbia River Continued

Bonnevllle Jam, tallwater, left bank

Moffett Creek, mouth of, left bank

Warrendale, Oreg., left bank

Warrendale, Oreg., left bank

Dodson, Oreg., left bank

Dodson, Oreg., left bank

Horsetail Falls, Creg., left bank

Multnomah Falls, Oreg., left bank

Bridal Veil, Oreg., left bank

Bridal Veil, Oreg., left bank

Left bank (backwater)

Rooster Rock, Creg. (backwater), left bank

Mount Pleasant, Wash., right bank

Tunnel Point, Oreg., left bank

Corbett, Oreg., left bank

Taylor, Oreg., left bank

Left bank

Washougal, Wash., right bank

Railroad bridge over Sandy River, left bank

Parker Landing, Wash., right bank

Camas, Wash., Crown Willamette Paper Co. dock,

right bank

lone Reef, Oreg., left bank

Sandy Pumphouse, left bank

Smith Rock Quarry, Wash., right bank

Portland, Oreg., foot of Northeast 105th St.,

left bank

Elsworth Cannery dock. Wash., right bank

Vancouver, Wash., right bank

Left bank

Power-line crossing on Vancouver 'bar, left bank

Sauvles Island, head of, (Willamette River channel).

left -bank

Sauvies Island, Kelley Point, mouth of Willamette

River, left bank

Sauvies Island, mouth of Dairy Creek, left bank

Scappoose, Oreg., Multnomah channel, 1 mile below

Johnson's landing, left bank

Henric landing, Sauvies Island, left bank

St. Helens, Oreg., left bank

Left bank

Deer Island, left bank

Martins Bluff, Wash., right bank

Coffin Rock, Oreg., left bank

Thayer Dock, Oreg., left bank

Rainier, Oreg., left bank

Dibblee dike, Oreg., left bank

Left bank

Mayger, Oreg., left bank

Bradbury, Oreg., Johns bridge, left I nk

Beaver Dock, left bank

Webb-Midland drainage district gage, left bank

Marshland, Oreg., opposite Cape Horn, Wash., left

bank

Miles 

above 

mouth

145.2

143.3

141.8

141.5

140.2

139.7

138.2

135.8

131.8

131.8

129.2

128.7

128.7

127.5

126.8

125.9

124.6

122.7

121.5

121.6

120.3

119.8

118.8

116.1

113.1

112.1

106.3

105.4

104.2

102.3

101.3

100.6

95.0

90.1

86.1

83.7

80.2

79.2

73.0

69.7

67.7

64.6

62.6

58.6

55.0

52.3

47.4

46.3

Day 

and 

hour 

1948

May 31

2 pm

May 31

3 pm

May 31

4 pm

May 31

5 pmMay 31

6 pm

May 31

8 pm

May 31

. 10 pm 

May 31

11 pm

May 31

12 pm

June 1

1 am

June 1

2 am

June 1

3 am

June 1

4 am

June 1

5 am

June 1

6 am

June 1

7 am

June 1

9 am

June 1

10 am

June 1

1 pm

June 14

8 am

June 1

1 pm

June 13,

14

June 1

1 pm

June 1

1 pm

June 1

1 pm

June 13

1 pm

June 9

4 am

June 8

4 am

June 10

4:45 am

June 9

4:30 am

June 10

4:45 am

Altitude 

in 

feet

48.7

44.2

43.1

43.2

41.5

42.3

42.1

41.7

41.1

41.5

40.3

40.1

39.9

40.2

39.6

39.8

39.2

39.1

38.5

38.8

37.9

37.7

37.3

36.2

35.5

34.8

32.55

32.0

31.5

31.2

30.7

30.4

29.7

28.7

27.4

26.6

26.4

25.6

22.7

21.2

20.4

18.8

17.8

16.6

15.7

14.2

12.5

12.9

824933 O - 49 - 22
FLOODS OP MAY-OWE 1948 IN COLUMBIA RIVER BASIN

Table 4. Flood-crest stages Continued

Stream and location

COLUMBIA RIVER MAIN STEM--Continued

Columbia River Continued

Westland Slough, Oreg., left bank

Garden Slough on Puget Island, left bank

Clifton, Oreg., left bank

Elokomin Slough, Wash., right bank

Right bank

YAKIMA RIVER BASIN

Yakima River:

Irrigation dam, Just above, right bank

Irrigation dam, 1.6 miles below, right

Bridge near Grosscup Ranch, 1.3 miles above,

right bank

Bridge near Grosscup Ranch, right bank

Bridge near Grosscup Ranch, 1.4 miles below,

right bank

Van Geisen St. Bridge, right bank

Van Geisen St. Bridge, 1.1 miles below, right bank

Right bank

Richland, Wash., highway bridge, 1.6 miles above

Richland, Wash., Junction of Yakima Highway

(in backwater), right bank

SNAKE RIVER BASIN

Snake River:

Right bank

Right bank

Lewiston, Idaho, right bank

Lewiston, Idaho, right bank

Lewiston, Idaho, right abutment of highway bridge,

right bank

Clarkston, Wash., under power line, left bank

Clarkston, Wash., left bank

Clarkston, Wash., right bank

Alpowa Ferry, 2.7 miles above, right bank

Clarkston, Wash., Geological Survey gage, right bank

Moses, Wash., 1.0 mile above, right bank

Steptoe Creek, 0.5 mile below, right bank

Indian, Wash., 0.7 mile above, right bank

Right bank

Bishop, Wash., 0.7 mile above Yakawawa Canyon,

right bank

Truax, Wash., right bank

Truax, Wash., Truax Rapids, right bank

Granite Point Rapids, right bank

Granite Point, right bank

Granite Point, right bank

Granite Dam axis, 0.6 mile above road up Cluge

Creek draw, right bank

Cluge Creek, mouth of, right bank

Mayview, Wash., 0.2 mile above grain tramway,

right bank

Mayview, Wash., 0.3 mile below grain tramway,

right bank

Wawawai, Wash., 0.7 mile below, right bank

Log Cabin Island, opposite downstream end of,

right bank

Almota, Wash., near Ferry cable, right bank

Lower Ilia Rapids, railroad bridge, right bank

Swift, Wash., 0.9 mile above, right bank

Swift, Wash., railroad bridge, 1.2 miles below,

right bank

Penawawa, Wash., railroad bridge, right bank

Purrington, Wash., 1.9 miles above, right bank

Purrington, Wash., 1.1 miles below, right bank

Central Ferry, Wash., 0.6 mile below, Central Ferry

bridge, right bank

Ridpath, Wash., 2.7 miles above, right bank

Ridpath, Wash., 1.1 miles below, right bank

Little Goose damsite, right bank

Little Goose damsite, right bank

Miles 

above 

mouth

44.0

40.0

35.5

35.5

35.0

17.9

16.3

14.4

13.1

11.7

8.3

7.2

5.4

3.7

1.1

141.7

141.0

140.2

140.0

139.6

139.0

138.3

137.3

133.5

132.5

130.3

127.7

124.1

121.3

118.7

116.0

115.7

114.9

114.2

113.8

113.6

113.0

112.3

111.8

110.1

107.2

103.3

100.6

97.6

94.8

91.7

88.3

85.2

82.6

79.7

75.9

75.3

74.6

Day 

and 

hour 

1948

June 8,9,30

4 am

June 9

4 am

June 9

3 am

June 10

3:35 am

June 9

3 am

May 31, 9 am

May 31

May 31

May 31

May 31

May 31,10 am

May 31

May 31

May 31, 11am

Noon

June 12,4pm

May 29

5 pm

May 29

May 29

May 29

May 29

May 29

May 29

May 29

May 29

May 29

6 pm

May 29

May 29

May 29

May 29

7 pm

May 29

May 29

May 29

May 29

May 29

May 29

May 29

May 29

8 pm

May 29

May 29

May 29

May 29

May 29

9 pm

May 29

May 29

May 29

10 pm

May 29

May 29

May 29

May 29

11 pm

May 29

May 29

May 29

May 29

Altitude 

in 

feet

11.4

10.4

9.5

9.4

9.4

421.9

402.8

394.4

390.5

384.5

371.4

367.6

361.3

355.9

353.6

735.2

734.1

732.5

731.1

730.9

728.5

726.1

732.8

714.4

710.4

703.8

696.0

687.7

680.7

674.2

667.2

666.1

663.5

662.1

661.0

660.5

659.5

658.1

656.7

652.6

d643.0

d632.1

d623.8

d616.1

d609.2

602.4

d592.5

d584.0

d576.9

d569.3

d558.8

d556.7

d555.8

d Elevation of crest estimated from daily water-surface elevations
FLOOD-CREST STAGES 313

Table 4.--Flood-crest stages Continued

Stream and location

SHAKE RIVER BASIN Continued

Snake River Continued

Little Goose damsite, right bank

Flagpole, Wash., 1.4 miles above, right bank

Little Goose damsite, 1.0 mile above Flagpole, Wash.,

right bank

Little Goose damsite, 0.6 mile above Flagpole, Wash.,

right bank

Little Goose Dam axis, 0.1 mile below Flagpole, Wash.,

right bank

Little Goose damsite, 0.3 mile below Flagpole, Wash.,

right bank

Flagpole, Wash., 0.6 mile below, right bank

Right bank

Right bank

Riparia, Wash., 2.7 miles above railroad bridge,

right bank

Riparia, Wash., 1.5 miles below, right bank

Tucannon River, 0.3 mile below mouth of, right bank

Palouse River, mouth of, right bank

Oregon-Washington R. R. & Navigation Co. railroad

bridge, 2.3 miles below, right bank

Ayer, Wash., 1.0 mile above, right bank

Ayer, Wash., 1.3 miles below, right bank

Harder, Wash., 1.3 miles above, right bank

Magallon, Wash., Monumental Dam axis, right bank

Devils Canyon, mouth of, right bank

Windust, Wash., 2.0 miles above, right bank

Windust, Wash., 1.2 miles below, right bank

Burr Canyon, 0.8 mile above, right bank

Burr Canyon, 1.1 miles below, right bank

Right bank

Right bank

Walker, Wash., right bank

Simmons Rapids, right bank

Snake River Junction, Wash., 1 mile above, right bank

Copleys Cutoff Rapids, head of, right bank

Anchor Rapids, foot of, right bank

Page , Wash . , right bank

Fish Hook Rapids, head of, right bank

Levey, Wash., 2.0 miles above, right bank

Levey, Wash., 0.8 mile below, right bank

Right bank

Gage Island Rapids, right bank

Ice Harbor damsite, right bank

Ice Harbor damsite, right bank

Ice Harbor damsite, right bank

Pasco, Wash., Geological Survey gage, right bank

Martindale, Wash., 5-mile damsite, right bank

Strawberry Island, head of, right bank

Strawberry "island, opposite, right bank

Strawberry Island, opposite, right bank

Highway bridge, right bank

Northern Pacific Ry. bridge, 0.4 mile below, right

bank

Mouth, right bank

Grande Ronde River:

Island City, Oreg., county road bridge, center pier

Island City, 1.4 miles east of, county road bridge,

right bank

Island City, 4.1 miles east of, county road bridge,

left bank

County road bridge, State ditch, right bank

~ ~~ .-

County road bridge, left bank

Allcel, Oreg., 2 miles east of, county road bridge,

left bank

County road bridge, left bank

Imbler, Oreg., 1 mile south of, county road bridge,

left bank

Miles 

above 

mouth

74.0

73.7

73.3

72.9

72.2

72.0

 ^71.7

71.2

70.3

69. B

66.7

62.0

59.4

56.6

53.6

51.1

47.1

44.7

42.6

40.7

38.5

36.6

34.7

32.6

31.4

29.7

28.0

26.9

24.9

21.2

19.5

18.0

14.1

11.9

11.7

11.0

10.5

9.5

9.0

6.3

6.0

4.9

4.3

3.3

2.2

1.1

0

e!28.25

e!26.75

e!24.18

6121.97

ell9.72

118.65

113.82

109.85

Day 

and 

hour 

1948

May 29

May 29

12 pm

May 30

May 30

May 30

May 30

May 30

May 30

May 30

May 30

May 30

1 am

May 30

May 30

May 30

May 30

2 am

May 30

May 30

May 30

3 am

May 30

May 30

May 30

May 30

May 30

4 am

May 30

May 30

May 30

May 30

May 30

May 30

5 am

May 30

May 30

May 30

May 30

6 pm

May 30

May 30

May 30

May 30

May 30

May 30

May 30

7 am

May 30

May 30

May 30

May 30

May 30

May 30

May 30

May 22

5:35 pm

May 22

5:25 pm

May 22

5:15 pm

May 22

8 : 15 pm

May 22

7:50 pm

May 23

4:45 pm

May 23

5 pm

May 23,

24,28,29

Altitude 

in 

feet

d554.2

d553.3

d551.7

d550.8

d548.9

d548.6

d547.8

544.2

d543.4

d541.9

533.6

d516.0

505.1

d495.4

d488.1

d480.0

d470.1

d460.4

454.6

450.3

444.3

438.6

431.6

425.6

423.3

417.9

415.4

411.7

406.9

400.3

394.2

390.9

375.8

371.1

369.0

366.1

363.9

362.3

361.9

353.5

350.8

348.8

347.2

345.6

343.4

341.7

341.5

2,730.2

2,709.3

2,696.1

2,691.1

2,685.1

2,683.1

2,680.9

2,678.5

d Elevation of crest estimated from daily water-surface elevations, 

e State ditch is present channel of Grande Ronde River above mile 118.72 and 

carried all flow of river during 1948 flood.
314 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Table 4. Flood-crest stages Continued

Stream and location

SNAKE RIVER BASIN Continued

Grande Ronde River Continued

Rhinehart, Oreg., 0.5 mile east of, county road

bridge, left bank

Rhinehart, Oreg., 1.2 miles northeast of, Highway 82

bridge, left bank

Rondowa, Oreg., 500 feet below Wallowa River,

Geological Survey gage, right bank

Catherine Creek f/: 

Union, Oreg., 6 miles southeast of

Hot Lake, Oreg., 1.5 miles east of, on Highway 30

bridge, right bank

County road bridge, left bank

Highway 342 bridge, right bank

County road bridge, center of bridge

County road bridge, right bank

Confluence of Catherine Creek and State ditch

Clearwater River:

Oroflno, Idaho, right bank

Myrtle, Idaho, highway bridge, right bank

Spalding, Idaho, right abutment of railroad bridge,

right bank

Spalding, Idaho, Geological Survey gage on highway

bridge, right bank

Potlatch Lumber Co. dam, 300 feet below, right bank

Pot latch Lumber Co. dam, 0.4 mile below, right bankRight bank

Lewiston Idaho north end 30th St . , right bank

Lewlston Idaho east end 1st Ave . , right bank

Lewiston Idaho 18th St. Bridge, right bank

Lewlston Idaho left bank

Lewiston Idaho left bank

WALLA WALLA RIVER BASIN

Walla Walla River:

Right bank

Right bank

Reese, Wash., right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Right bank

Wallula,' Wash., Union Pacific R. R. bridge.

left bank

Left bank

Walla Walla River, mouth of, left bank

WILLAMETTE RIVER BASIN

Willamette River:

Oregon City, Oreg., below Oregon City Palls, right

bank

Gladstone, Oreg., mouth of Clackamas River, right

bank

Jennings Lodge, Oreg., right bank

Marylhurst College, left bank

Oswego, Oreg., mouth of Oswego Creek, left bank

Oswego, Oreg., Southern Pacific R. R. bridge, left

abutment

Miles 

above 

mouth

104.80

103.30

81.5

49.76

37.98

34.86

23.63

18.08

9.41

0

44.8

18.2

12.0

11.6

4.6

4.2

3.3

2.8

2.3

1.8

1.4

.8

13.1

12.6

12.1

11.6

11.2

10.8

10.3

9.5

8.9

8.5

7.9

7.4

6.6

5.7

5.2

4.7

4.1

3.6

.7

0

25.6

24.3

22.6

21.5

20.4

19.5

Day 

and 

hour 

1948

May 24

10:40 am

May 29

11:45 am

May 24

1:20 pm

May 28

2 am

May 27

8:30 pm

May 28

1:30 pm

May 27,28,

29,30

May 30

11:30 am

May 28

4:30 pm

May 29

11 am

May 29

May 29

3 pm

May 29

May 29

May 29

May 29

May 29

May 29

May 29

May 29

5 pm

May 30

May 30

May 30

May 30

June 1,14

June 1,14

June 1,14

June 1,14

June 1,14

June 1,14

Altitude 

in 

feet

2,675.5

2,672.9

2,291.2

3,086.6

2,705.3

2,695.5

2,690.1

2,686.3

2,683.2

1,017.78

852.4

796.8

C795.7

756.1

753.3

748.5

744.2

739.1

735.7

734.5

732.5

379.7

377.8

375.0

374.0

370.9

367.6

365.0

362.0

358.2

353.4

352.9

347.9

342.2

340.0

333.4

327.3

320.4

320.4

320.5

320.0

31.0

31.2

30.9

31.6

31.6

31.3

c Observed by Geological Survey.

f Catherine Creek flows in former Grande Ronde River channel; mouth is considered 

to be at point where State ditch returns to natural channel of Grande Ronde River at 

mile 118.7.
STAGE RELATIONS, COLUMBIA RIVER HEAR INTERNATIONAL BOUNDARY 315

Table 4. Flood-crest stages Continued

Stream and location

WILLAMETTE RIVER BASIN Continued

Wlllamette River Continued

Riverwood, Oreg., left bank

Portland, Oreg., U. S. Weather Bureau gage at

Morris on St. Bridge

Portland, Oreg., foot of S.W. Stark St., left bank

Portland, Oreg., government moorings, left bank

Wlllamette River, mouth of, left bank

Miles

above

mouth

17.9

12.6

12.5

6.1

- 0

Day 

and

hour

1948

June 1,14

June 14

June 1,14

June 1,14

June 1,14

Altitude

In

feet

31.2

g31.13

30.0

30.0

31.3

g Furnished by Portland Harbor Patrol.

STAGE RELATIONS, COLUMBIA RIVER NEAR INTERNATIONAL BOUNDARY

The effects of Grand Coulee Dam and the channel excavation of 1941-42 at the 

Little Dalles on the stages of the flood of 1948 at and near the International boundary 

are Illustrated In figure 20. Franklin D. Roosevelt Lake was essentially full throughout the flood period. The following deductions concerning the flood of 1948 may be 

drawn from the diagram:

1. For discharges above about 430,000 second-feet, stages of Columbia River 

above the Little Dalles were lower than they would have been under natural 

conditions. The lowering in stage was apparently Inappreciable at the 

International boundary.

2. For discharges above about 430,000 second-feet, stages of-Columbia River 

at the International boundary were not affected by Backwater from Franklin D. 

Roosevelt Lake. For discharges below about 430,000 second-feet, such backwater, 

If present at all, was Inappreciable.
OF BUREAU BOUNDARY, INTERNATIONAL AT FEET, IN STAGE, 

1937 OF DATUM RECLAMATION 

SECOND-FEET) IN (DISCHARGE, 

9T£ SdOOTtf £0 SNOf-iVW 8?6T NI VIQHniOO H3AIH MISVS 


MAONITUDE AND FREQUENCY OP FLOODS IN THE COLUMBIA RIVER BASIN

By S. E. Rantz and H. C. Riggs

ABSTRACT

The report presents in convenient form the existing data on flood magnitudes and 

frequencies at selected gaging stations In Columbia River Basin. The moat commonly 

used methods of analyzing flood data and plotting flood frequencies are discussed 

briefly. There is no Intention of suggesting the superiority of one method over 

another. For further Information on frequency distributions, a list of references is 

furnished.

The main body of the report contains for each gaging station a brief description, 

a tabulation of all recorded floods, and frequency graphs computed by both the annualflood and the partial-duratlon-aeriea methods. An enveloping curve of flood discharge 

is also presented.

INTRODUCTION

In the relatively short period of time aince white men settled in the Columbia 

River Basin a number of damaging floods have occurred. In apite of the diminution of 

average precipitation and runoff since 1900 flood damage seems to be increasing. A 

popular conception attributes the Increasing damage to greater and more frequent floods. 

This appears to be an unsertaln point, as accurate records of floods have not been 

kept for a sufficient length of time to be conclusive. It Is probable that man's 

encroachment on the flood plains of rivers places more valuable property In the path of 

recurring floods.

Prom a practical engineering standpoint, a study of the economics of structures 

within reach of flood waters must include consideration of the possibility of damaging 

floods. Highway bridges and culverts must be designed to provide for the passage of 

flood flows. Provision for the passage of the greatest expected flood must be made in 

the design of dams and other important structures whose failure would cause loss of life 

or great economic loss. Where failure of the structure would result In only nominal 

property damage, a study of flood frequency provides a valuable tool for obtaining a 

balance between cost and damage or liability resulting from failure. Where great 

damage would be caused by failure, the danger involved in determining the "design" 

flood by extrapolation of flood frequensy graphs cannot be overemphasized. The 

inherent errors of sampling when using short-terra flood records are such that curves 

extrapolated beyond the range of data are of limited value. For design of dam spillways 

and similar Important structures, the maximum possible discharge must be determined by 

methods that involve an analysis of such hydrologlc factors as the physical characteristics of the drainage basin, maximum possible precipitation, and maximum rates of 

snow melt (Creager, Justin, and Hinds, 1944) I/.

All of the existing data on flood magnitudes and frequencies at selected gaging 

stations in Columbia River Basin are presented In concise form. The stations were 

selected on the basis of length of record and absence of substantial artificial 

regulation or diversion.

The variations In the flood frequency graphs reflect differences In drainage basin

I/ See p.469 for list of references cited. 

824933 O - 49 - 23
318 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

characteristics, such as size, shape, stream pattern, geology, vegetal cover, and 

channel storage, as well as differences In precipitation. The effect of these factors 

or Influences on stream flow Is complex, and short-cut formulas or procedures that take 

Into account only a few of the many factors rarely give completely satisfactory results.

ADMINISTRATION AND ACKNOWLEDGMENTS

The data In this report were compiled and prepared for publication In the Tacoma, 

Wash., office of the branch of water utilization, Geological Survey, under the direction 

of C. C. McDonald, district engineer. The procedures used were outlined by R. W. 

Davenport, chief, and W. B. Langbein, hydraulic engineer,, of the branch of water 

utilization.

The examination and compilation of the data and the preparation of the text and 

illustrations were done principally by S. E. Rantz and H. C. Riggs, hydraulic engineers. 

F. W. Kennon, hydraulic engineer, assisted in the preliminary work.

Determination of the flood peaks was made from original data in the files of the 

Helena, Mont., Boise, Idaho, Tacoma, Wash., and Portland, Oreg., districts of the 

surface water branch, Geological .Survey. Grateful acknowledgment is made to the 

following district engineers of the surface water branch for cooperation in furnishing 

assistance in obtaining and checking data: In Montana, A. H. Tattle} in Idaho. T. R. 

Newellj in Washington, F. M. Veatch; and in Oregon, G. H. Canfield prior to Aug. 31, 

1948, and K. N. Phillips thereafter. Additional information was obtained from the files 

of the Washington Water Power Co., Spokane, Wash., and from the Bureau of Indian 

Affairs, Wapato, Wash. The cooperation and assistance of these organizations are 

gratefully acknowledged.

PHYSICAL FEATURES OF THE BASIN

Columbia River rises in the mountains of British Columbia and flows northwest for 

nearly 200 *iiles before it turns south--270 miles from where it crosses the boundary 

line between British Columbia and Washington. It turns west abruptly 112 miles south 

of the Canadian boundary and continues for more than 100 miles to the eastern foothills of the Cascade Range, which it follows southward to the mouth of Snake River. 

A few miles downstream from this Junction, Columbia River again turns west and forms the 

boundary between Oregon and Washington all the way to the Pacific. Kootenai, Pend 

Oreille, and Spokane Rivers are tributaries draining parts of western Montana, northern 

Idaho, and British Columbia. From the west a number of streams heading in the Cascades 

contribute to Columbia River. Snake River, the largest tributary, drains practically 

all of southern and central Idaho, a large area in eastern Oregon, and parts of Wyoming, 

Utah, and Nevada.

Columbia River is the largest stream in the western United States. It drains an 

area of about 295,000 square miles, of which 39,000 square miles is in Canada. Nearly 

40 percent of the total area is above the mouth of Snake River. Although Snake River 

drains 109,000 square miles, its discharge is considerably less than that of Columbia 

River at their confluence.

The headwaters of Columbia River drain an area of high mountains, heavy forests, 

numerous glaciers, and extensive snow fields. Tributaries from the east drain a 

timbered mountainous area west of the Rocky Mountains. East of Columbia River in
SOUTH FORK BOISE RI

19

OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH

Figure 21."Graphs of mean daily discharge for year of high runoff at river-measurement st
rl,000,000

NOVEMBER DECEMBER JANUARY FEBRUARY MARCH

Figure 22. Graphs of mean dally discharge for year of high runoff at river-measurement st
(-100,000

BOULDER CREEK NEAR

FEBRUARY MARCH APRIL MAY 

OCTOBER NOVEMBER DECEMBER JANUARY

Figure 23. Graphs of mean daily discharge for year of high runoff at river-measurement statio
322 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Washington Is the great rolling Columbia River Plateau. This plateau, which has few 

stream channels, Is arid and covered with sagebrush, although In the eastern part there 

is sufficient moisture for dry farming. Prom this area no tributary of consequence 

enters Columbia River for the 317 miles between Spokane and Snake Rivers. The annual 

runoff for this 9,000 square miles Is nearly zero. It Is In this area that the great 

Columbia Basin Irrigation project Is being developed.

Much of the Snake River Basin Is arid, especially In southern Idaho, and from the 

mouth of Snake River to the Cascade Mountains precipitation Is quite low. That part 

of Columbia River Basin west of the Cascade Range Is humid and subject to winter 

floods, which are due to Intense rains. It differs radically from the rest of the 

basin and contributes only a small percentage of the spring flood volumes of Columbia 

River.

CHARACTERISTICS OP FLOODS IN COLOMBIA RIVER BASIN

Storms traveling eastward from the Pacific lose a considerable part of their 

moisture on the west side of the Cascade Range, with the result that the eastern 

slopes receive little rain. In the region just east of the Cascade Range the annual 

precipitation Is 4 to 10 Inches a year. As the storms move eastward and encounter 

higher altitudes the precipitation increases until the Continental Divide Is reached. 

A large percentage of this precipitation occurs during the winter and spring, and at 

the^hlgher altitudes It occurs as snow.

Columbia River and Its larger tributaries, particularly In the upper part of 

the basin, are unusually regular In their annual high-water cycle. The one highwater period each year occurs In summer and Is due primarily to snow melt at high 

altitudes. Except for that part of the basin west of the Cascade Range, floods are 

rarely due directly to storm rainfall, even on the smaller streams. Floods of record 

proportions have occurred on some Columbia River tributaries during winter months, 

but snow melt was a contributing factor.

Except in the Kootenay Plats, normal spring floods cause comparatively little 

damage because of deep channels and adequate fall. In fact, these spring floods 

are generally beneficial, as they come at a time when water is needed for Irrigation. 

An unusually large flood, such as that of 1948, causes disastrous losses, because 

the major part of the commercial development and much agricultural development are 

along the river channels.

Figures 21-23 show typical hydrographs of daily mean discharge for water 

years during which high peak flows occurred. All these hydrographs show a spring 

rise due to snow melt. The rise is more gradual on the larger streams, as their 

flow Is the combination of flows of many small streams, the peaks of which do not 

coincide. Hydrographs for St. Joe River at Calder, Idaho, and Boulder Creek near 

Leonia, Idaho (fig. 23), are shown for selected years during which the annual peak 

flow occurred in winter. These high winter flows resulted from heavy rains and high 

temperatures which melted snow that was already on the ground. The hydrograph 

patterns of these two streams are usually similar to the others shown, in that 

the peak discharge occurs during the spring rise. Snow runoff from the lower 

Columbia River tributaries occurs earlier in the year than from tributaries in 

the northern part of the basin. Normally Snake River attains its peak flow 

before Columbia River below the Junction, but in -both the floods of 1894 and 1948 

the respective peaks were nearly coincident.
MAGNITUDE AND FREQUENCY OF FLOODS 323

Some flood hydrographs Illustrating unusually rapid flood rises are shown In 

figure 24. Except on small streams this form of flood hydrograph Is ndt typical for 

flood rises In the Columbia River Basin, and yet a considerable number of record peak 

flows are of the type shown. Melting snow contributes an Important part of the flood 

discharge In nearly all Instances.

Records of peak stage In the vicinity of The Dalles, Oreg., have been kept since 

1858. Major floods occurred In 1862, 1876, 1894, and 1948. The flood of 1849, of 

which there Is no authentic record, was reported to have been 5 feet higher than that 

of 1862. The greatest of these five floods was that of 1894.

The following description of It Is taken largely from newspaper accounts, as 

there are few official records. It Is reported that the winter of 1893-94 was colder 

than usual and that record depths of snow accumulated In the mountains. Apparently 

the precipitation for the year was about 150 percent of normal. Unusually high 

temperatures during late May and early June greatly accelerated the runoff. By 

May 30 the tributaries were at extreme flood stage, and many railroads were made 

Impassable by washouts and Inundation. Columbia River continued to rise at The Dalles 

until June 6, when a peak discharge of 1,240,000 second-feet was reached. During the 

period of the rise thunderstorms of cloudburst proportions added to flood volumes In 

many smaller streams, causing Increased damage. The main line of the Great Northern 

Railway was blocked west of Helena, Mont., by high water and washouts. Damage along 

Kootenal River was extreme. Be'tween Newport and Bonners Perry 2 miles of track were 

completely destroyed, and the town of Bonners Perry was under 7 feet of water. Along 

Wenatchee River numerous washouts made the railroad impassable. The flood waters of 

Columbia River reached the top of rails at the Great Northern depot In Wenatchee, 

Wash. The peak discharge at this point was estimated to have been 740,000 secondfeet. On Yaklma River all bridges between Yaklma and Prosser were unapproachable, 

the Union Gap bridge was broken In two, the flats opposite Yaklma City were 

inundated, and In the bottom lands near Parker water was several feet deep, nearly 

reaching the tops of the hop poles. The Northern Pacific Railway along Clark Fork, 

normally 20 feet above water, was 1 to 5 feet under water for 95 miles, from Horse 

Plains, Mont., to a point a few miles west of Hope, Idaho. Flood damage In Montana 

was very great and would have been greater had it not been for the fact that the 

country was rather thinly settled. All wooden railroad and wagon bridges across 

Spokane River In the vicinity of Spokane were washed out. By far the greatest flood 

damage occurred on Columbia River below The Dalles. Although the Cascade locks were 

saved, cost of repairs was estimated to be $600,000. Two hundred miles of the Union 

Pacific railroad was Inundated, water being over the tops of telegraph poles for 

miles, and 100 miles of the track was almost completely destroyed. The entire 

wholesale district of Portland was under 6 to 10 feet of water. Travel east from 

Portland was by transfer boat to Kelso, Wash., railroad to Tacoma, Northern Pacific 

Railway to Spokane, and thence by branch line to Umatilla, Oreg., on the main line 

of the Union Pacific Railroad. An enormous area in the lower Columbia River Valley 

was inundated. Passengers on one trip by transfer boat from Portland to Kelso 

counted 100 houses floating in the river. Floods on Fraser River in British 

Columbia and on the streams west of the Cascade Range in Washington added to 

transportation difficulties. The flood subsided slowly on the larger streams and
324 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

especially on Columbia River. Snow was reported to be 10 to 30 feet deep on the headwaters of Okanogan, Yaklma, and Cowlltz Rivers and other streams as late as June 6, the 

date of the flood crest at The Dalles. Estimates of the flood damage varied greatly. 

An article In the Tacoma Dally Ledger for June 10, 1894, states that the damage In the 

Northwest was conservatively estimated to be $5,200,000, of which $2,800,000 was to 

railroads and $1,000,000 was attributed to farms damaged and crops lost In British 

Columbia, Oregon, Washington, Idaho, and Montana. It was noted that the greater part 

of the damage occurred below the mouth of Snake River.

In the 53-year period between 1894 and 1948 the nine highest flood peaks on 

Columbia River In the vicinity of The Dalles ranged In magnitude from 722,000 secondfeet to 787,000 second-feet. The highest of these is less than 70 percent of the 

1894 peak. During recent years long-range estimates of peak flow, determined from 

snow surveys, and accurate forecasting of flood stages several days In advance have 

been valuable in reducing flood losses on the larger streams.

An example of a comparatively localized flood is that of December 1921 on 

Wenatchee River. November was a mild month except for a sudden cold spell from 

November 17 to«24. During this period about 46 Inches of snow fell on the eastern 

slope of the Cascades. Much of this snow was melted by a rain that began at the lower 

altitudes on November 22. By the end of the month only 20 Inches of snow remained. 

This remaining snow was taken off by excessive rains and warm winds between December 

10 and 14, particularly those of December 11 and 12. The resulting flood caused 

considerable losses and, until 1948, was the largest of record. (See fig. 24.)

The most general winter flood of record in Columbia River Basin occurred In 

December 1933. This flood was unusual on account of Its severity, the great length 

of time It prevailed, and the large area affected. In the Yakima and Spokane River 

Basins record flood peaks were established. Although Columbia River did not reach 

flood stage, the damage along tributary streams was enormous. Damage In the State 

of Washington was estimated to be $10,400,000.

The flood In the Yakima River Basin Is described, as the pattern of precipitation 

was somewhat typical of that which occurred throughout much of the upper Columbia 

River Basin. Yakima and Naches Rivers began to rise noticeably on December 9, 

1933, reaching on December 12 the highest crest since 1917. The flood waters 

receded gradually from December 13 to 17, rose slightly from December 18 to 22, and 

then on December 23 rose to a peak discharge that was approximately three times 

greater than the one recorded on December .12.

The floods resulted from a heavy snow cover on the upper drainage area, unseasonably warm weather with melting of snow, and copious rainfall. An unusually high 

temperature accumulation took place after October 1 and through December. Precipitation 

for December averaged 367 percent of normal at the various reservoirs on the headwaters 

of Yakima River. The peak discharge of Yakima River at Union Gap was 54,300 secondfeet, and had It not been for reservoir storage the peak probably would have been 

above 80,000 second-feet.

Intense precipitation over small areas In Columbia River Basin occasionally causes 

considerable damage. On May 27, 1894,, a storm of cloudburst proportions occurred on the 

headwaters of Salmon Creek, a tributary of Okanogan River. Newspapers reported that the 

resulting flood crest, which was 8 to 12 feet high when It passed through the town of 

Conconully, Wash., destroyed or washed away every one of the 125 buildings except the
DISCHARGE, IN SECOND-FEET

\

I
326 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

post office and a hotel. Only one life was lost, because the inhabitants had warning. 

The water receded within an hour or two.

Considerable data are available on the Squillehuek Creek flood of 1925. This creek 

is tributary to Columbia River at Wenatehee, Wash. It has a total drainage area of 27.2 

square miles and a fall of 6,200 feet in 11 miles. On September 5 a very localized 

storm centered over a part of this basin and caused such a rapidly advancing flood that 

14 people were drowned, and property near the mouth of the creek was damaged to the 

extent of $130,000. Computations made from field information indicate that the 

intensity of runoff was 62Q second-feet per square mile from 26.6 square miles.

METHODS OF ANALYSIS

In this report the flood data are analyzed by the annual-flood method and by the 

partial-duration-series method (Foster, 1924, pp. 142-203). In the former method only 

the highest peak discharge in each water year is used. In the latter method all peak 

discharges above an arbitrarily chosen base are used, without regard to the number of 

peaks within a water year. Consequently only the annual series is a complete 

probability or frequency series and thus is readily susceptible of mathematical analysis 

by fitting frequency curves to the plotted points. On the other hand, the partialduration series may often list major floods excluded from the annual series, and though 

not representing a complete tiine series it gives results in a form that may be more 

nearly what is desired than those obtained by the annual-flood method. For those 

stations having few years with more than one peak, the two methods give essentially the 

same results.

Statistical analysis of the probability of recurrence of floods of various 

magnitudes has been the subject of numerous investigations. Some of the best known are 

those of Hazen (1930), Foster (1924, pp. 142-203), (Joodrieh (1927, pp. 1-91), Slade 

(1936, pp. 35-104), and Gumbel (1943, pp. 699-716j 1945, p. 83). Each investigator has 

favored some particular method of analysis. The Qumbel theory, based on the consideration that the annual flood is the maximum of a large number of independent events, 

arrives at a frequency distribution of floods with coefficient of skew implied as a 

constant, 1.139. Qumbel introduces two parameters, u and I/a, representing, 

respectively, the modal (most common) flood discharge and the logarithmic rate of 

increase. These two parameters are computed from the mean flood and the"standard 

deviation of the series. Furthermore, by introducing a dimensionless variable y 

(reduced flood), related to the return period T, Ourabel arrives at an equation for his 

theoretical magnitude-frequency curve: x = u + (I/a) y, where x is the flood equaled 

or exceeded on the average once in T years.

The Gumbel procedure has much to recommend it. The linear form of his equation of 

the magnitude-frequency curve simplifies plotting, and he has fixed the rather uncertain 

coefficient of skew by the development of a rational theory. A possible weakness of the 

theory lies in the fact that it is based on two premises that have yet to be conclusively 

demonstrated: (1) that a year includes a large number of independent flood events and 

(2) that the duration curve of daily discharge approaches an exponential function of 

the form e~x at its upper extremity.

Oumbel also t derives by mathematical means a plotting position which assumes that 

each flood in the sample available corresponds to the modal or most probable value of 

floods of the same relative magnitude in a large number of series. He presents formulas
MAGNITUDE AND FREQUENCY OP FLOODS 327

and tables for the plotting positions of the highest and lowest values of an array, as 

well as a formula and table for interpolating the remaining plotting positions between 

these two extremes.

Plotting positions

In each of the two arrays, the annual series and the partial-duration .series, the 

tabulated floods were numbered in order of their magnitude, beginning with the highest. 

The recurrence interval of each flood was then computed by the formula T ff ^ = for 

determining plotting position, in which T is the recurrence interval in years, M is the 

relative magnitude of the flood, and N is the total number of years. This formula is 

based on the premise that for any number of items (N) In an annual series there are 

N + 1 intervals into which any subsequent flood will fall. That Is to say, a 

subsequent flood may either exceed the highest in any array, fall short of the lowest, 

or fall into one of the N-l intervals between the two. This formula gives results 

acceptably in conformance with those obtained by the Gumbel formulas. It is simple 

to compute, and It is equally applicable to the annual series and partial-duration 

series.

Where the maximum flood is one that antedates the period of record, its recurrence 

Interval Is computed entirely Independently of those floods within the period of record. 

Its recurrence interval Is assumed to be equal to one plus the number of years for which 

It is known to be the highest flood.

The Hazen method of computing plotting positions has been widely used In the past. 

In this method, the recurrence Interval, T is computed as ^ fl ^ where N Is the 

number of years of record, and M Is the rank of the flood beginning with the largest. 

This method assumes that a flood of any relative magnitude in a series will occupy a 

medial position among floods of the same relative rank in a large number of series, in 

contrast to the modal position advocated by Gumbel.

The equation T = ^ has also been used In flood-frequency studies. This method 

assumes that the flood events In the period of record have the same frequency 

distribution as those of a longer period; that is, the highest flood in "10 years of 

record has a recurrence Interval of 10 years.

The following table Illustrates the recurrence Interval obtained from various 

plotting formulas and by the binomial theorem expansion for a 10-year record:

Recurrence Interval (years)

Magnitude of 

annual flood

1/1

2

3

5

7

10

Hazen,

N

20.0

6.67

4.00

2.22

1.54

1.05

N 

H

10.0

5.00

3.33

2.00

1.43

1.00

Qumbel

10.5

5.31

3.55

2.14

1.53

1.07

N+l 

TT

11.0

5.50

3.67

2.20

1.57

1.10

Binomial theorem expansion

Medial

14.9

6.25

3.84

Z.24

1.56

1.07

Modal

10.5

4.87

3.26

2.00

1.45

1.05

£/ Highest; numbered In order of magnitude.

From this table It can be seen that the Hazen recurrence Interval of 20 years Is 

nearly double the recurrence interval derived by other methods, except for the medial 

flood In the binomial theorem expansion. The Geological Survey has In the past 

(Jarvis and others, 1936) used the Hazen method for computing the recurrence interval.
328 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

However, later developments, Including the Gumbel theory, have resulted In a preference 

for a method that assumes a modal position for the largest flood. In this report, the 

equation T = Itl has been used' exclusively.

For discussions of other plotting procedures the reader Is referred to the various 

articles cited In the list of references.

Annual-flood method

Having determined the recurrence Intervals for the annual-flood series as described 

above, the next step was to plot the flood magnltude-frequency relation. For this 

purpose a special plotting paper was prepared In accordance with the Gumbel theory as 

suggested by Powell (Feb. 1943, pp. 35-104). The horizontal lines are spaced uniformly 

for the discharge scale, and the distance between the vertical lines Is made 

proportional to y (reduced flood) for the recurrence Interval scale. The Intercept on 

the y = 0 ordlnate (the dashed line at T = 1.58 years) Is u, the computed modal flood, 

and I/a Is the slope of the line. The mean discharge plots at y = +0.577 or T s 2.33 

years, shown as a dotted line.

With the data plotted, the question of fitting a curve naturally arises. A line 

could be fitted using the Gumbel equations or the methods of least squares. The short 

lengths of the records and the sampling errors Inherent In the data Indicate that 

analytically fitted functions are not worth while and may be misleading. The plotted 

points were, therefore, merely Joined by straight lines and any curve fitting"Is left 

to the Judgment of the user. As the plots on Gumbel paper should approximate a 

straight line, fitting such a line by eye probably gives results as reliable as those 

obtained by more Involved methods. The Gumbel theory has not yet been proved 

conclusively. The use of a curve as the line of best fit cannot be considered erroneous.

The annual-flood frequency graph for Columbia River near The Dalles, Oreg., for the 

period 1858-1946 (fig. 25), Illustrates the applicability of the Gumbel diagram. The 

computed Gumbel line is sho/m.

Partlal-duratlon-serles method

The objection to the omission of major floods In the annual series Is met In the 

partial-duration series by listing all floods above a selected base, without regard to 

the number within any given time period. When the maximum dally flood flows, rather 

than Instantaneous peaks, are listed, such a series Is essentially the upper end of 

the flow duration curve for the gaging station, hence the name partial duration. 

However, Instantaneous peak discharges are used In this report with few exceptions.

With all the floods above the selected base tabulated and the recurrence Intervals 

computed, as described on preceding pages, the data were plotted on semllog paper. 

Discharges are plotted arithmetically and recurrence Intervals logarithmically. The 

plotted points were Joined by straight lines; no curve or line of best fit was 

attempted. As the data of a partial-duration series do not form a complete frequency 

series, statistical analysis is difficult. Should the user of the data desire to fit 

a curve to the plotted points, he can do so by inspection.

Geyer (1940, pp. 660-568) has proposed a graphical method of determining the 

equation of the curve of best fit, but it has been found, in this study at least, 

to be of very limited applicability. One of the objectionable features is that his
MAGNITUDE AND FREQUENCY 0? FLOODS 329

1 300

1,200

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RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

Figure 25. Annual-flood frequency graph for Columbia River near The Dalles, Oreg. 

shoving use of Gumbel diagram.

equation employs as one of Its constants the upper limiting flood of the drainage basin. 

This limiting value Is of course very Indefinite.

Comparison omp. of annual-flood and

partlal-duratlon-serles art methods

The special applicability of the frequency graphs of the annual flood series on the 

one hand and the partial-duration series on the other Is apparent If distinction In 

meaning of the term "recurrence Interval" as applied to each method Is kept in mind. 

In the annual-flood series the recurrence Interval le the average Interval In which 

a flood of given size will be equaled or exceeded as an annual maximum. In the partialduration series It Is the average Interval In which a given flood will be equaled or 

exceeded, regardless of relationship to the year or any other period of tin*. This 

distinction remains, even though for very large floods the numerical values of the two 

are sensibly the same.

The annual-flood series might, for example, be used In the design of a bridge, 

which once destroyed might take as long as a year to replace. In this case the flood 

to be considered Is the highest flood In a year. Other floods, though they may exceed 

ranking floods In other years, will cause no further damage to the structure. However, 

If one considers a highway,that will be Inundated but not necessarily destroyed by any 

flood, or If damaged will be repaired rapidly and again be exposed to risk, It Is 

apparent that the partial-duration series should be employed.

The greater number of floods listed In the partial-duration series is commonly 

considered an advantage, particularly when the record Is short. However, most of 

these points are at the low end of the graph, and the points at the upper end are
330 FLOODS OP MAY-JUME 1948 IN COLUMBIA RIVER BASIN

generally Identical with those In the annual-flood series. An objection to the use of 

the partial-duration series is the fact that the floods listed may not be fully 

Independent events; that la, one flood sets the stage for another. A related objection 

Is the fact that when the listed peaks follow each other closely any damage will 

probably be caused by the highest, the associated peaks having only Indirect or 

secondary effects on the losses.

For Intervals of less than 10 years, a flood of given size will have a shorter 

recurrence Interval In the partial-duration series than It will In the annual series. 

The two methods give essentially Identical results for the larger floods for intervals 

greater than about 10 years. As most designs are for Intervals greater than this, It 

Is apparent that from a practical standpoint either method Is satisfactory* although 

perhaps the simplicity of the annual-flood method makes It attractive.

Probable error of a flood-frequency graph

The plotting positions used In this report are based on the assumption that the 

flood aerlea listed would occupy a. modal position In a large number of flood seplea 

of the same length. However, the single series available may represent a period of 

high flood activity or low flood activity. There Is little knowledge of Its normality 

In this respect. By use of the binomial theorem of probability the probable limits of 

variation can be determined. It Is conventional to let the quartlle points (25 percept 

and 75 percent probabilities) mark these limits. The recurrence Intervals for a 

25-year series for probabilities of 25 percent and 75 percent and the recurrence 

intervals computed by the formula T - ^- = would be as follows:

Magnitude

1

2

3

4

5

6

7

8

9

10

15

20

25

Recurrence Interval (years)

Probability = O.ZS

18.5

9.9

6.8

5.2

4.2

3.6

3.1

2.7

2.4

2.23

1.58

1.23

1.01

Probability = 0.75

90\8

25t6

14.5

9.8

7.4

5.8

4.9

4.1

3.6

3.17

1.97

1.40

1.06

-H H + 1

26.0

13.0

8.7

6.5

5.2

4.3

3.7

3.2

2.9

2.60

1.73

1.30

1.04

These limits of variation are shown on the flood-frequency graph for Swan River 

near Big Pork, Mont., for the period 1922-46, a 25-year record. (See fig. 26.) 

The quartlle graphs shown were drawn after smoothing the Irregularities of the modal 

graph. According to the theory here expressed, there is a 50-percent chance that 

future experience will show that the probable error will be between tfce limits shown. 

Of course there is also a 50-percent chance that it will be outside the limits shown, 

but the 50-percent brackets are customary for expressing "probable" limits of 

variation.

Considering the wide range of probable error indicated, the results obtained from 

elaborate mathematical processes for analyzing flood frequency data are highly 

questionable. Extrapolation, whether graphical or analytical, has a firm basis only 

when the phenomena have been demonstrated to conform to underlying law. This law of 

flood occurrences has not yet been discovered.
MAGNITUDE AND FREQUENCY OP FLOODS

10 

9 

8 

7 

6 

5 

4 

3 

2 

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RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

Figure 26. Flood-frequency graph for Swan River near Big Fork, Mont., showing probable

limits of variation.

THE ENVELOPING CURVE

The enveloping curve of maximum discharges per square mile for stations In the 

Columbia River Basin (fig. 27) Is based mainly on data given In the summary of flood 

discharges In this flood report. It should not be construed as a maximum expected flood 

discharge curve. For drainage areas smaller than 4,000 square miles the enveloping 

curve Is based on stream-flow records that are generally less than 30 years In length. 

The comparatively few records of long duration Indicate that the last two decades have 

been considerably drier than preceding years, and consequently the plotted discharges 

In general represent a period of relatively low flow. It Is probable that the flood 

activity during this period was below normal. For areas larger than 4,000 square miles 

the curve Is based mainly on the flood of 1894, which Is known to have been the greatest 

general flood In the basin In nearly 100 years. Only 9 determinations of discharge for 

that flood have been made.

Available records produce no evidence that large-scale major floods In the Columbia 

River Basin above the Cascade Range have been caused by rains not associated with melting 

snow. Much of the basin is semlarld, and although summer oloudburat storms cause 

occasional flash floods, these storms are confined to small areas. A discharge of 620 

second-feet per square mile was attained on Squlllohuok Creek at tfenatchee, Wash., in 

September 1925 from a drainage area of 26.6 square miles. Few computations of peak flow 

have been made on floods of this type, but a considerable number of these floods have been 

reported.

The enveloping curve of peak discharges from areas larger than 50,000 square miles 

gives rates of flow equal to or greater than those that have occurred in other western 

river systems. For areas under 10,000 square miles, but excluding the extremely small 

areas, the curve shows the lowest flood discharge per square mile of any basin west of
I.OOO

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DRAINAGE AREA, IN SQUARE MILES

Figure 27. Maximum discharges, in second-feet per square mile, of various floods 
MAGNITUDE AND FREQUENCY OP FLOODS 333

Mississippi River, with the exception of Great Basin. The maximum rate at which snow 

melts under natural conditions is not sufficiently rapid to produce discharges from 

small basins, even approaching those that result from intense rains. However, snow melt 

over large areas, contributing simultaneously through many tributaries to the major 

stream, results in flood flows comparable with those from heavy rains.

The curves for the sub-basins reflect varied characteristics. A line enveloping 

discharges for streams in the Spokane River Basin would have a steep slope, owing to 

two conditions. Storage in Coeur d'Alene Lake flattens the flood peaks on Spokane River 

considerably. As for Spokane River itself, its bed and banks are composed of a glacial 

outwash of gravel, with the bed having a silt overburden. As the stage rises above this 

overburden, water rapidly percolates into the exposed gravel banks and goes into bank 

storage to be released at a lower river stage.

The enveloping curve for the Okanogan River Basin would also have a very steep 

slope. Similkameen River is the principal tributary of Okanogan River and flows into 

it a short distance upstream from the gaging station near Tonasket. At the Junction 

the two stream basins are roughly equal In drainage area. Lighter precipitation and 

the considerable lake storage In the upper Okanogan Basin combine to reduce its peak 

discharges to about 10 percent of those on Similkameen River. The time lag between 

peaks on these two streams further tends to bring about peaks of nearly equal magnitude 

on Similkameen River and Okanogan River below the Junction. ""*

If sufficient records of virgin flow on other tributary basins were available the 

effects of other basin characteristics might be shown. The enveloping curve is 

principally of value in presenting an over-all view of known flood occurrences. It has 

limited use as a means of determining the flood-producing potentiality of a stream with 

a relatively short runoff record by Comparison with a neighboring stream having a longer 

record. Only where a reasonable relation can be found between each of the various 

characteristics of the two basins will this method give plausible results.

FLOOD MAGNITUDE AND FREQUENCIES

The Information on time, gage height, and discharge of floods In the following 

flood frequency studies is taken, with few exceptions, from the original stream-gaging 

records of the Geological Survey. Most of the gaging-station records studied are of more 

than 20 years duration. As a matter of general interest annual peak discharges for two 

Spokane River stations are included, although the large degree of regulation on that 

river for power operations precludes any analysis of flood frequency.

For the purpose of this compilation a flood peak is defined as a discharge which 

significantly exceeds the preceding and following discharges. It is usually at least 

25 percent greater than the adjacent troughs in the discharge graphs, and In general is 

associated with a separate and distinct meteorological event. The base flow or lower 

limiting value in selecting flood peaks at each station is in general taken as the 

minimum annual peak, so as to include at least one flood in each year of record. Most of 

the floods in the upper Columbia River Basin result from snow melt, and consequently there 

is often a lack of complete independence between peaks.

Flood data may be collected on the basis of either maximum daily mean discharge or 

instantaneous peak discharge for each flood rise. The former has been extensively used

in previous studies because of the availability of the daily mean discharges. 

824933 O - 49 - 24
334 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Instantaneous peak values determined from recorder charts or from graphs based on 

nonrecording gage readings are used In this report, except at a few gaging stations 

where the Instantaneous peaks and dally mean discharges have sensibly the same value. 

Where dally figures have been used, this fact Is noted In the Individual station 

description.

In the tabulations of peaks at each gaging station, all complete years are used. 

Incomplete years are used for the annual-flood series If It Is known that the maximum 

flood of the year occurred during the period of record. For the partial-duration series, 

Incomplete years are used only when there Is good evidence that no floods above the base 

occurred during the missing period. For several stations where the discharge Is known 

for a flood prior to the period of record, as the 1894 flood, It Is Included In the 

tabulation If It Is known to have been the maximum for the time between Its occurrence 

and the start of the period of record.

Records for each gaging station have been reviewed critically for accuracy and 

consistency In the light of present standards and practices. In some Instances figures 

of discharge have been used that differ from those previously published In water-supply 

papers. These differences may be due to revision of the rating curve on the basis of 

later and more accurate Information or to the use of graphs constructed from nonrecording 

gage readings In place of the readings themselves as used originally. Where the 

differences are"appreclable the previously published figures are considered as being 

revised, and as such will be reported In the annual reports on Surface Water Supply of 

the United States. Where no-such revisions are reported, It can be assumed that the 

figures originally published can be used without significant loss of accuracy.

The data are listed by water years ending September 30.
MAGNITUDE AND FREQUENCY. OP FLOODS 335

COLUMBIA RIVER MAIN STEM 

Columbia River at Kettle Falls, Wash.

Location.- Lat. 48°37'20", long. 118°07'00", at Kettle Falls, 3£ miles upstream from 

Colvllle River, May 3, 1931 to June 9, 1941. At site 1-f miles downstream from Kettle 

Falls, June 5, 1921 to May 2, 1931. Prior to June 5, 1921, and during part of winter 

1922-23, U. S. Weather Bureau gage at Marcus, 4j miles upstream from Kettle Falls.

Drainage area.- 64,500 square miles.

Records available.- April 1913 to June 1941, Including estimated monthly discharge for 

period prior to April 1916 and for winter months prior to winter of 1921-22.

Gage.- Non-recording gage read once dally to Apr. 19, 1921; twice dally thereafter to 

llay 2, 1931. Recording gage May 3, 1931, to June 9, 1941. After June 5, 1921, datum 

of gage at mean sea level, subject to correction to datum of 1929. Datum of U. S. 

Weather Bureau gage is 1,205.55 feet above mean sea level, subject to correction to 

datum of 1929.

Stage-discharge feet. relation.- Defined by current-meter measurements below 431,000 secondMaximum flood of record.- 468,000 second-feet June 14, 1913.

Historical data.- Flood of June 1894 reached a stage of 44.7 feet on U. S. Weather 

Bureau gage at Marcus (discharge, 700,000 second-feet, based on information from 

several sources)..

Remarks.- Discharges listed are daily means. Flow affected by natural storage in many 

lakes. Many diversions above station for irrigation, but quantity diverted Is very 

small percentage of total flow. Gage heights prior to June 5, 1921, obtained from 

stage-relation curve between Kettle Falls and Marcus.

Year

1894

1913

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

-1934

1935

1936

1937

1938

1939

1940

Month

June

June

June

June

June

June

July

June

June

June

May

May

May

June

May

June

June

June

June

June

June

June

June

June

June

June

June

Day

14

30

24

26

1

17

11

17

17

25

27

7

18

30

16

15

13

18

22

2

19

4

24

8

1

2

Gage 

height 

(f*t)

a44.7

a34.2

1,233.8

1,230.0

1,231.2

1,227.5

1,228.5

1,192.7

1,190.7

1,190.6

1,186.9

1,190.7

1,180.0

1,192.4

1,194.6

1,188.1

1,184.8

1,188.0

1,194.4

1,198.1

1,194.9

1,193.3

1,195.0

1,189.2

1,193.6

1,190.4

1,190.4

Period 1915, 1916-40

Discharge 

( eeondJMt)

700,000

468,000

458,000

367,000

396,000

309,000

332,000

420,000

373,000

371,000

287,000

373,000

168,000

413,000

466,000

313,000

246,000

240,000

351,000

435,000

369,000

355,000

374,000

256,000

344,000

279,0"00

277,000

Annual floods

Older

(M)

1

1

3

13

7

19

17

5

9

11

20

10

26

6

2

18

24

25

14

4

12

16

8

23

15

21

22

R0CU1T6&C6

interval

(van)

56.0

27.0

9.00

2.08

3.86

1.42

1.59

5.40

3.00

2.45

1.35

2.70

1.04

4.50

13.5

1.50

1.12

1.08

1.93

6.75

2.25

1.69

3.38

1.17

1.80

1.29

1.23

Partial 

duration series

Order

(M)

R0CU1T6&C6

interral

(gtOM)

346 , 900 Mean annual

a U. S. Weather Bureau gage at Marcus.
336 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Columbia River at Kettle Falls, Wash., 1894, 1913, 1916-40

800

700

O 500

< 400

uj' 200

 ^

82 8 ~ « * » o 2 o o 3 g g g 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

Columbia River near The Dalles, Oreg., 1858-1948

UJ 

UJ

4-1,100 o 

o

to 

u. 

O 900

to

Q

to 

O

j£ 700

Z

UJ 600 

O 

cc

5 500 

to

Q

300

200, 

<

^\

3 c

r*

3 S

^

r'

3

t*

t

1

r-'

? p

^

j

X

c

>

^

^

y

u

*»*

1

»* »^

^

0 u

^*

2 S

^

3 S

^

/

? ?

/

1 S

]

4

?

/

/

/

8 5? g

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS
MAGNITUDE AND PREQU3NCY QP FLOODS

COLUMBIA RIVER MAIN STEM

Columbia River near The Dalles, Oreg.

(Formerly published as Columbia River at The Dalles)

Location.- Lat. 45 39', long. 120°58', Just upstream from Celilo Palls, 3 miles downstream from Desehutes River, and 11 miles east of The Dalles. Prior to Oct. 1, 

1931, at following sites: June 1 to Dec. 11, 1878, at Umatilla, 100 miles upstream 

from The Dalles; Dec. 12, 1878, to Oct. 9, 1879, Just upstream from Cascade Locks, 

42 miles downstream from The Dalles; Oct. 10, 1879, to June 30, 1881, at The Dalles; 

July 1, 1881, to Jan. 31, 1892, Just upstream from Cascade Locks; Feb. 1, 1892, to 

Sept. 30, 1931 at The Dalles. Umatilla, Jonir Day, and Desehutes Rivers enter between 

Umatilla and Celilo Palls; Hood, JClidcitat, and White Salmon Rivers enter between The 

Dalles and Cascade Locks.

Drainage area.- 237,000 square miles (above The Dalles).

Records available.- June 1878 to September 1948. Annual floods 1858-77.

Gage.- Non-recording gage read once daily prior to Oct. 1, 1931, twice daily Oct. 1, 

1931, to May 1, 1935; recording gage thereafter. Gage datum elevations are as 

follows: June 1, 1878, to Dec. 11, 1878, not known; Dec. 12, 1878, to Oct. 9, 1879, 

July 1, 1881, to Jan. 31, 1892, 52.56 feet below mean sea level (readings reduced 

96.0 feet before publication); Oct. 10, 1879, to June 30, 1881, Peb. 1, 1892, to 

Sept. 30, 1931, 46.86 feet above mean sea level; Oct. 1, 1931, to May 1, 1935, 37.59 

feet above mean sea level; May 2, 1935, to Sept. 30, 1946, at mean sea level. All 

elevations refer to datum of 1929.

Stage-discharge relation.- Defined by current-meter measurements below 1,000,000 secondfeet.

Maximum flood of record.- 1,840,000 second-feet (revised) June 6, 1894.

Historical data.- Gage-height records were"pbtained for annual floods 1858-77 by Oregon 

Steam Navigation Co. at Lower Cascade Landing. Discharges have been applied to 

represent flow at The Dalles. Plood of 1862 reached a stage of 48.9 feet and flood 

of 1876 a stage of 52.3 feet (corrected) at The Dalles. Plood of 1849, of which 

there is no authentic record, reported to be 5 feet higher than that of 1862.

Remarks.- Discharges listed are daily means. Storage and diversion for irrigation are 

only a small part of the total flow. Some regulation since 1940 by Pranklin D. 

Roosevelt Lake above Grand Coulee Dam; usable capacity 5,120,000 acre-feet.

Year

1858

1859

1860

1861

1862

1863

1864

1865

1866

1867

1868

1869

1870

1871

1872

1873

1874

1875

1876

1877

1878

1879

1880

1881

1882

1883

1884

1885

1886

1887

1888

1889

1890

1891

1892

1893

1894

1895

1896

1897

1898

1899

1900

1901

1902

Month

_

-

-

_

-

_

-

-

_

-

_

-

_

_

-

_

-

_

_

-

June

June

July

June

June

June

June

June

June

June

June

June

May

June

June

June

June

May

June

May

June

June

May

June

June

Day

_

_

_

_

-

_

_

_

_

-

_

_

_

_

-

_

_

_

_

-

12

18

1

17

13

14

13

23

9

19

18

5

14

2

22

14

6

31

22

24

20

22

19

1

1

Gage 

height

(feet)

_

_

-

-

48.9

_

_

-

_

-

_

-

_

_

-

_

_

_

b52.3

-

18.0

31.2

48.5

34.6

40.8

28.3

31.4

22.5

30.4

39.3

25.9

14.7

28.8

21.1

35.0

38.3

59.6

28.7

42.9

42.7

36.9

43.0

32.2

37.5

33.7

Discharge 

(»ecmd-feet>

563,000

874,000

668,000

618,000

919,000

777,000

654,000

714,000

839,000

671,000

483,000

328,000

777,000

856,000

737,000

638,000

582,000

684,000

1,020,000

486,000

485,000

643,000

914,000

598,000

883,000

573,000

698,000

482,000

673,000

896,000

564,000

302,000

633,000

448,000

607,000

679,000

1,240,000

475,000

785,000

780,000

649,000

787,000

547,000

662,000

644,000

Annual floods

Order

(M)

59

8

33

44

4

15

35

24

10

32

69

85

16

9

20

41

49

27

2 

67

68

39

5

47

7

54

25

70

31

6

58

89

42

75

45

28

1

72

13

14

37

11

61

34

38

Recurrence 

interval 

(yeo/n)

1.56

11.5

2.79

2.09

23.0

6.13

2.63

3.83

9.20

2.88

1.33

1.08

5.75

10.2

4.60

2.24

1.88

3.41

46.0

1.37

1.35

2.36

18.4

1.96

13.2

1.70

3.68

1.32

2.97

15.3

1.58

1.03

2.19

1.23

2.04

3.28

92.0

1.28

7.08

6.58

2.49

8.36

1.51

2.71

2.42

Partial 

duration series

Order

(M)

Recurrence 

interval 

(yton>
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

COLUMBIA RIVER MAIN STEM 

Columbia River near The Dalles, Oreg. Continued

Year

1903

1904

1905

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

June

May

June

June

June

June

June

May

June

June

June

May

June

July

June

June

June

June

June

June

June

May

May

May

June

May

June

June

May

May

June

May

June

May

June

May

May

June

June

June

June

June

June

May

May

May

Day

18

26

15

1

5

18

19

14

17

1

12

27

1

1

20

25

1

26

11

9

14

26

24

8

18

29

19

14

19

24

18

2

10

17

24

31

21

5

11

18

21

19

8

30

11

31

height 

(ftet)

43.0

36.0

25.5

23.4

34.1

37.1

38.1

33.1

33.5

33.2

41.8

29.6

20.8

40.4

40.4

33.7

32.5

26.3

42.4

38.2

33.8

26.6

36.6

17.1

38.8

42.1

27.7

20.2

18.8

106.0

110.0

103.1

141.31

142.7

138.62

144.6

138.9

138.42

135.7

140.06

143.00

137.15

141.94

143.96

_

-

Period 1858-1948

Discharge 

(Kxond-feet)

787,000

629,000

412,000

374,000

587,000

653,000

675,000

566,000

574,000

568,000

759,000

493,000

328,000

727,000

727,000

578,000

553,000

428,000

773,000

677,000

581,000

433,000

642,000

269,000

690,000

766,000

460,000

332,000

308,000

565,000

722,000

453,000

476,000

529,000

376,000

605,000

387,000

369,000

272,000

428,000

541,000

326,000

505,000

581,000

536,000

999,000

Annual floods

Order

(M)

12

43

79

82

48

36

30

56

53

55

19

66

86

21

22

52

60

77

17

29

50

76

40

91

26

18

73

84

88

57

23

74

71

64

81

46

80

83

90

78 .

62

87

65

51

63

3

Recurrence 

interval

(yean)

7.67

2.14

1.17

1.12

1.92

2.56

3.07

1.64

1.74

1.67

4.84

1.39

1.07

4.38

4.18

1.77

1.53

1.19

5.41

3.17

1.84

1.21

2.30

1.01

3.54

5.11

1.26

1.10

1.05

1.61

4.00

1.24

1.30

1.44

1.14

2.00

1.15

1.11

1.02

1.18

1.48

1.06

1.42

1.80

1.46

30.7

Partial 

duration series

Order

(M)

610,500 Mean annual

Recurrence 

interval

(yean)

b Corrected.

KOOTENAI RIVER BASIN 

Kootenai River at Libby, Mont.

Location.- Lat. 48°24', long. 115°33', 1,200 feet downstream from highway bridge at Libby 

' and half a mile downstream from Libby Creek. Prior to Apr. 28, 1931, at highway

bridge at different datum. 

Drainage area.- 10,240 square miles.

gecords available.- October 1910 to September 1948 (1934 fragmentary). 

Gage.- Non-recording gage read twice daily 1911-19, 1928-29; once daily 1920-27, 1930 to

Apr. 27, 1931. Recording gage thereafter.

Stage-discharge relation.- Defined by current-meter measurements below 87,000 second-feet. 

Maximum flood of recorjTr^ 130,000 second-feet June SI, 1916. 

Remarks.- No diversion or regulation. Gage heights for period when non-recording gage

was used are from graphs based on gage readings.
MAGNITUDE AND FREQUENCY OP FLOODS 

Koot.enai River at Llbby, Mont.

339

130 

120 

110 

100 

90 

80 

70 

60 

50 

40 

30 

20.

 '

/

^

^

J

/

/

/

!

/

S

«^

/- 

1

^» 

9

f*'

1

1

I -L48

** ^

/

/^

 ^

382 8 " « * « o u, o o § g ggg

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

130

120

no 

100

90

80

70

60

50

40

30

20

1911-33, -48

9 g

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 26.400 SECOND-FEET
340 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN 

Kootenai River at titty, Mont. Continued

Year

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

Month

MayJune

May

June

July

June

May

June

July

May

June

May

June

May

June

May

June

Apr.

May

June

May

June

July

May

June

May

June

May

June

May

May

June

May

Apr.

May

June

May

July

May

June

May

June

May

June

May

June

Day

8

18

4

16

18

28

19

15

4

11

5

18

5

20

6

11

28

8

21

16

29

11

18

6

17

13

30

29

23

13

19

4

27

9

24

20

6

24

14

18

23

23

1

29

18

12

27

2

25

4

21

1

10

17

4

20

15

23

5

16

Gage 

height 

(feet)

8.2

8.5

12.4

13.8

9.6

8.6

9.4

8,3

14.3

14.0

8.7

10.5

12.1

12.0

9.9

8.2

9.5

10.1

19.24

9.77

10.83

12.28

12.99

9.69

8.73

14.29

8.71

14.59

11.47

8.06

11.64

12.51

13.48

13.84

10.82

10.39

13.45

10.20

13.67

10.74

14.38

10.68

8.04

8.40

9.99

14.90

13.85

10.17

11.67

12.17

8.00

11.46

11.17

10.66

8.70

8.39

11.75

13.27

13.87

14.06

Discharge 

( eamd-fat)

27,600

29,500

59,500

72,500

36,800

30,100

35,400

 27,600

77,300

74,400

30,700

43,500

56,900

56,000

39,000

27,600

36,100

40,400

130,000

38,200

45,900

58,600

65,000

37,500

30,700

77,300

30,700

80,200

51,700

27,000

52,500

60,400

69,600

72,500

45,900

42,700

58,700

41,200

71,500

45,100

78,200

45,100

26,400

28,800

39,700

83,100

70,200

42,300

53,500

57,400

28,100

52,100

50,000

41,200

29,600

27,900

47,100

56,800

60,800

62,000

Annual floods

Older

(M)

12

34

8

23

35

1

18

9

5

21

13

16

14

30

7

38

4

15

22

25

31

20

Recurrence 

interval 

femnt)

3.25

1.15

4.88

1.70

1.11

39.0

2.17

4.33

7.80

1.86

3.00

2.44

2.79

1.30

5.57

1.03

9.75

2.60

1.77

1.56

1.26

1.95

. Partial 

duration series

Order

(M)

93

88

25

13

74

86

76

94

8

10

83

57

28

30

59

95

75

65

1

70

49

26

20

73

84

9

85

5

36

97

33

23

17

14

50

58

18

51

15

52

7

53

101

89

68

4

16

59

32

27

90

35

40

62

87

91

45

29

22

21

Recurrence 

interval 

(yean>

0.41

.43

1.52

2.92

.51

,44

.50

.40

4.75

3.80

.46

.67

1.36

1.27

.55

.40

.51

.58

38.0

.54

.78

1.46

1.90

.52

.45

4.22

.45

7.60

1.06

.39

1.15

1.65

2.24

2.71

.76

.65

2.11

.62

2.53

.73

5.42

.72

.38

.43

.56

9.50

2.38

.64

1.19

1.40.

.42

1.09

.95

.61

.44

.42

.84

1.31

1.73

1.81
MAGNITUDE AND FREQUENCY OP FLOODS 341

KOOTENAI RIVER BASIN 

Kootenai River at Libby, Mont. Continued

Year

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942-

1943

1944

1945

1946

1947

1948

Month

Apr.

June

Apr.

May

May

June

Apr.

May

June

May

June

Apr.

May

June

May

July

May

June

May

May

June

July

Apr. 

May

June

July

May

June

June

May

May

June

May

Day

29

6

18

29

18

31

24

2

24

16

1

28

4

19

19

3

28

24

5

18

31

2

13

26

15

19

13

27

9

4

21 

29

19

4

21

1

2

23

7

30

11

4

1

28

Gage 

height 

(f*t)

9.21

13.80

16.90

14.04

13.64

14.39

12.66

11.79

8.21

11.59

12.18

10.76

10.65

10.21

9.94

9.58

15.60

12.17

9.28

10.80

10.00

9.04

10.35

11.88

9.06

8.18

11.74

14.45

12.79

11.69

11.26 

11.86

12.19

11.32

8.18

8.44

12.44

10.92

11.25

15.12

15.06

11.87

 8.12

19.93

Period 1911-48

Discharge 

( econdjeel)

31,600

59,700

85,600

61,000

58,400

63,700

52,500

46,900

27,300

45,700

49,400

41,000

39,900

37,600

35.000

33,200

78,800

50,500

32,800

41,000

40,000

31,200

38,200

48,500

31,200

26,800

46,500

67,900

54,600

46,500

43,800 

47,900

50,100

43,800

26,800

27,800

51,600

41,8QO

43,800

74,300

74,300

48,500

26,800

122,000

Annual floods

Otder

(M)

3

19

24

28

32

6

33

29

37

17

27

36

26

10

11

2

ROCUZTBUC6

interval 

<*«* >

13.0

2.05

1.62

1.39

1.22

6.50

1.18

1.35

1.05

2.30

J..44

1.08

1.50

3.90

3.54

19.5

Partial 

duration series

Older

(M)

80

24

3

-

-

-

34

46

96

51

41

63

67

72

77

78

6

38

79

64

66

81

71

42

82

98

47

19

31

48

55 

44

39

54

99

92

37

60

56

11

12

43

100

2

1

Recurrence 

interval

AM-M} (JfWM mf

0.48

1.58

12.7

-

-

-

1.12

.83

.40

.74

.93

.60

.57

.53

.49

.49

6.33

1.00

.48

.59

.58

.47

.54

.90

.46

.39

.81

2.00

1.23

.79

.69 

.86

.97

.70

.38

.41

1.03

.63

.68

3.46

3.16

.88

.38

19.0

62,530 Mean annual
342 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN. 

Kootenal River at Leonla, Idaho

Location.- Lat. 48°37", long. 116°03', at Leonla, 450 feet east of Montana-Idaho State 

line and half a mile upstream from Boulder Creek.

Drainage area.- 11,740 square miles.

Records available.- March 1928 to September 1948.

Gage.- Hon-recordlng gage read once or twice dally prior to Nov. 13, 1928, recording 

gage thereafter. Datum of non-recording gage was 1,799.58 feet above mean sea 

level, that of recording gage is 1,700.00 feet above mean sea level (U. S. Coaat 

and Geodetic Survey datum).

Stage-discharge relation.- Defined by current-meter measurements.

Maximum flood of recorlT^ 123,000 second-feet May 28, 1948.

Historical data.- Floods of June 1894 and 1916 reached elevations of 1,824.6 and 

1,821.6 feet, respectively (discharge not determined), from Information by Great 

Northern Railway Co.

Remarks.- No diversion or regulation above station. Gage heights for period when nonrecording gage was used are from graphs based on gage readings. Major shift In 

stage-discharge relation occurred after June 1933 flood.

Year

1928

1929

1930

1931

1932

1933

1933

1934

1935

1936

1937

1938

1939

1940

1941

Month

Apr.

May

July

May

June

May

June

May

June

May

June

Apr.

June

Dec.

Apr.

May

May

June

Apr.

May

June

May

June

Apr.

May

June

May

July

May

June

May

Day

29

25

2

25

4

21

1

10

17

4

11

15

23

5

16

29

7

18

23

29

18

30

7

24

2

23

17

1

28

5

19

19

2

28

24

4

18

31

2

13

26

15

17

Elevation 

(feet)

1,808.90

1,816.05

1,811.02

1,813.30

1,813.47

1,808.24

1,812.72

1,812.24

1,810.97

1,808.12

1,807.76

1,813.55

1,814.96

1,815.04

1,814.99

1,811.09

1,815.50

1,818.11

1,811.66

1,816.40

1,815.09

1,815.55

1,809.60

1,815.04

1,813.85

1,810.13

1,813.23

1,813.29

1,812.40

1,811.79

1,811.23

1,813.33

1,811.79

1,817.64

1,813.20

1,810.90

1,812.11

1,811.12

1,809.12

1,811.55

1,812.92

1,809.00

1,809.05

Discharge 

(second-feet)

32,800

77,500

44,000

60,300

61,600

31,400

57,300

54,400

46,600

31,600

30,200

60,100

69,400

69,400

71,000

44,800

73,200 *

95,500

46,000

75,200

65,900

69,100

31,600

63,600

56,100

35,500

53,900

54,200

47,900

44,600

41,800

53,500

44,900

83,000

53,000

40,100

47,500

41,900

33,000

44,000

52,000

32,300

31,900

Annual floods

Older

(M)

5

11

14

19

9

2

7

10

15

17

3

18

16

20

Recurrence 

interval 

(yean)

4.40

2.00

1.57

- 1.16

2.44

11.0

3.14

2.20

1.47

1.29

7.33

1.22

1.37

1.10

Partial 

duration series

Order

(M)

56

5

45

17

16

62

23

2?

40

59

63

18

12

11

10

43

9

2

41

7

14

13

60

15

24

53

29

28

36

44

49

30

42

3

31

50

37

48

55

46

34

57

58

Recurrence 

interval 

(yean)

0.39

4.40

.49

1.29

1.37

.36

.96

.81

.55

.37

.35

1.22

1.83

2.00

2.20

.51

2.44

11.0

.54

3.14

1.57

1.69

.37

1.47

.92

.42

.76

.79

.61

.50

.45

.73

.52

7.33

.71

.44

.59

.46

.40

.48

.65

.39

.38
DISCHARGE, IN THOUSANDS OF SECON

c.2

-cl.O

8 10

§20 

O

s s 8858 

1.05

1.10

O *" 

2 50

150

200
FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN 

Kootenai River at Leonia, Idaho Continued

Year

1942

1943

1944

1945

1946

1947

1947

194,8

Month

May

June

July

Apr.

May

June

July

June

May

June

Apr.

May

May

Oct.

Apr.

May

Day

13

27

9

17

2

21

29

19

4

1

7

2

23

28

7

30

11

28

20

23

28

Elevation 

(feet)

1,813.81

1,816.60

1,814.40

1,812.36

1,813.05

1,814.28

1,814.37

1,814.03

1,812.57

1,808.80

1,809.15

1,814.32

1,811.78

1,810.19

1,813.84

1,816.92

1,817.56

1,813.06

1,810.84

1,810.03

1,823.40

Period 1928-48

Discharge 

(»econd-feet)

52,700

74,300

59,600

47,100

51,100

57,500

58,000

56,000

47,400

30,000

31,500

57,700

43,200

35,900

55,100

77,100

82,500

52,200

39,000

35,100

123,000

Annual floods

Order

(M)

8

12

21

13

6

4

1

Recurrence 

interval

(yean)

2.75

1.83

1.05

1.69

3.67

5.50

22.0

Partial 

duration series

Order

(M)

32

8

19

39

35

22

20

25

38

64

61

21

47

52

26

6

4

33

51

54

1

K6currenc6 

interval

(yean)

0.69

2.75

1.16

.56

.63

1.00

1.10

.88

.58

.34

.36

1.05

.47

.42

.85

3.67

5.50

.67

.43

.41

22.0

65,110 Mean annual

Kootenai River at Bonners Perry, Idaho

Location.- Lat. 48°42'00", long. 116°18'45", on highway bridge at Bonners Perry.

Drainage area.- 13,000 square miles.

Records available.- October 1927 to September 1948j gage heights only prior to April 

1928.May to October 1904, gage heights at site three-quarters of a mile downstream. Gage heights collected by U. S. Weather Bureau Hay 1904 to September 1927.

Gage.- Non-recording gage read twice daily. Beginning May 9, 1942, water-stage recorder across river at same datum used as supplemental gage. Datum of gage is at mean 

sea level (U. S. Coast and Geodetic Survey datum).

Stage-discharge relation.- Backwater effect from Kootenay Lake usually present at 

Bonners Perry and discharge computed by stage-fall-discharge relation dr other 

special means, defined by current-meter measurements.

Maximum flood of record.- 139,000 second-feet May 27, 1948j maximum daily discharge, 

130,000 second-feet May 28, 29, 1948.

Historical data.- Flood of June 1894 reached an elevation of 1,777.2 feet (.discharge 

not determined).

Remarks.- No diversion or regulation above station. Gage heights are the average of 

twice-daily gage readings prior to May 9, 1942j thereafter based on correlation 

curve between recording and non-recording gages. Daily discharges are listed 

throughout.

Year

1928

1929

1930

1931

1932

1933

Month

Apr.

May

July

May

June

May

June

May

June

May

June

Apr.

June

Day

29

25

3

25

4

22

2

10

17

4

14

23

5

16

29

6

18

Elevation 

(feet)

1,757.34

1,772.15

1,763.23

1,765.21

1,766.36

1,758.39

1,764.89

1,764.72

1,762.30

1,758.09

1,767.24

1,769.70

1,769.75

1,770.38

1,761.64

1,771.74

1,774.74

Discharge 

deeondSeeO

36,600

82,800

45,900

62,700

62,200

33,700

59,200

55,600

49,400

31,900

64,500

74,700

73,700

73,000

50,000

80,900

99,800

Annual floods

Order

(Mi.

6

12

14

19

9

2

Rdcurrenofi 

interval 

(Vean)

3.67

1.83

1.57

1.16

2.44

11.0

Partial 

duration series

Order

(M)

53

6

46

20

21

57

25

29

40

60

17

10

12

13

39

8

2

Recurrence 

interval 

<V«an)

0.42

3.67

.48

1.10

1.05

.39

.88

.76

.55

.37

1.29

2.20

1.83

1.69

.56

2.75

11.0
MAGNITUDE AND FREQUENCY OF FLOODS 

Kootenai River at Bonners Ferry, Idaho, 1928-49

ion

110

90

Hi

Ul H- 40

a 

o

Ul (/> 

u. i ^ g « «-

X

3 S

 « f-

/

/

>H

X'

D

4

§ *

miDD

^

/

j 

rwr

 ^

^

f 

r it

^

^i

JTCD

r~

IT

mi liti >if

,

11

'

(

r»

/

3 U

H r

s cnc

/

/

 > c

H 0 

AH

7

3 S

MIIAI

; i

n /

; 5

 \r\r

{ 

\c

8 S| |

cvirotm oooo 

RECURRENCE INTERVAL. IN YEARS, FOR FLOODS ABOVE 31,100 SECOND-FEET
FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN 

Kootenal River at Bonners Perry, Idaho Continued

Tear

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1947

1948

Month

Dec.

Apr.

May

May

June

Apr.

May

June

May

June

Apr.

May

June

May

July

May

June

May

May

June

July

Apr.

May

June

July

June

May

June

Apr.

May

May

Oct.

Apr.

May

D»y

23

29

18

31

7

24

2

24

17

1

28

4

19

19

2

27

23

4

18

31

2

13

26

15

18

14

27

8

17

1

21

29

19

4

1

7

2

23

21

30

11

28

21

23

29

Elevation 

(feet)

1,760.36

1,772.99

1,770.24

1,771.44

1,757.86

1,768.30

1,768.12

1,760.16

1,766.70

1,766.50

1,764.13

1,763.71

1,763.84

1,763.13

1,763.35

1,772.50

1,767.61

1,761.40

1,763.50

1,761.85

1,758.25

1,761.34

1,764.84

1,758.59

1,758.62

1,763.56

1,771.22

1,768.18

1,764.32

1,764.98

1,767.48

1,767.92

1,766.69

1,764.74

1,756.70

1,757.10

1,766.58

1,761.84

1,755.75

1,772.95

1,774.18

1,765.96

1,760.50

1,758.19

1,778.10

Period 1928-48

£SS

47,000

87,800

69,100

73,900

35,500

69,000

61,200

41,200

55,700

55,700

52,300

47,900

46,100

56,000

50,500

89,800

54,500

44,200

50,200

42,900

32,800

46,900

55,100

32,800

35,200

53,000

81,100

63,200

49,400

53,800

65,000

63,700

59,400

51,300

31,100

35,100

61,300

42,100

31,800

80,500

89,600

54,500

39,600

39,700

c 103, 000

Annual floods

Older

(M)

5

10

15

17

3

18

16

20

7

11

21

13

8

4

1

 111 ! »! ! nitervw

4.40

2.20

1.47

1.29

7.33

1.22

1.38

1.10

3.14

2.00

1.05

1.69

2.75

5.50

22.0

Partial 

duration series

Older

(M)

43

5

14

11

54

15

23

50

27

28

35

42

45

26

37

3

31

47

38

48

58

44

30

59

55

34

7

19

41

33

16

18

24

36

62

56

22

49

61

9

4

32

52

51

1

Recurrence

tyrant)

0.51

4.40

1.57

2.00

.41

1.47

.96

.44

.81

.79

.63

.52

.49

.85

.59

7.33

.71

.47

.58

.46

.38

.50

.73

.37

.40

.65

3.14

1.16

.54

.67

1.38

1.22

.92

.61

.35

.39

1.00

.45

.36

2.44

5.50

.69

.42

.43

22.0

68,350 Mean ammal |

o Daily discharge for May 28, 103,000 second-feet (elevation 1,777.88 feet).

Boulder Creek near Leonla, Idaho

Location^- Lat. 48°36', long. 116°06', half a mile downstream from McOlnty Creek, 3 miles

upstream from mouth, and 3 miles southwest of Leonia. 

Drainage area.- 53 square miles. 

Records available.- November 1928 to September 1948. April to November 1928 at site l£

miles downstream. 

Gage.- Non-recording gage read twice dally prior to November 1928, once dally January to

September 1934. Recording gage after November 1928, except for period January to

September 1934. 

Stage-discharge relation.- Defined by current-meter measurements below 1,680 second-feet

and by contracted-opening measurement of maximum discharge. 

Maximum flood of record.- 2,700 second-feet Oct. 19, 1947. 

Remarks.- Negligible diversion prior to 1936, none thereafter. No regulation. Peak clischarges for 1934 water year omitted because of Incomplete data. Major shift in stagedischarge relation after December 1933 flood.
DISCHARGE. IN HUNDREDS OF SECON

 ft

TO

c

 x 

m ,

0

m .4

^ - 5 fTI

<

Z 1.0

-<

>

33

3 9

 73

 n

0 d 

O 

O .

R<

m m

in 

m

O

Z

 n

^30

40

a

nN

i a

"* 

> c

V^fc

^

I N

»

^

1 '

^

- *.

* e

N,^

n a

N,

; \

~~ 

i K

h«

\

\

^v

i :

\

2 \

\.

\^

I 4

1.01 

1.05

1.10

JO

ni 1.50

JO

m z

rn

Z 3

5

> A

Z

>

W 10

T|

o 15

z

? 30

O

150

200

k 0

"x

...............

1 

v

\
348 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN 

Boulder Creek near Leonia, Idaho Continued

Year

1929

1930

1931

1932

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1941

1942

1943

1944

1945

1946

Month

Apr.

May

Apr.

May

Feb.

Apr.

May

June

Nov.

Dec.

Apr.

May

June

Nov.

May

Apr.

May

May

Apr.

May

Apr.

May

May

May

Dec.

Apr.

May

Apr.

Mav nay

May

May

Apr.

Mav ndjr

June

Day

27

12

8

14

22

2

13

27

13

7

21

2

13

2

28

14

26

30

4

8

7

5

22

(a)

25

4

11

4

25

18

30

25

21

29

3

14

3

11

17

2

20

22

9

25

19

4

25

9

5

15

26

19

26

29

4

11

17

25

28

3

6

Gage 

height 

(fit)

3.50

4.10

3.40

3.70

3.43

4.00

3.87

4.94

3.77

4.80

4.16

3.79

3.80

3.52

4.67

4.17

4.79

4.53

4.33

4.76

4.40

3.54

3.93

3.75

3.47

3.55

3.45

3.40

3.35

5.50

3.52

3.72

2.73

3.30

3.36

2.80

3.08

3.20

4.05

5.61

3.67

3.22

2.70

2.88

3.70

2.87

4.05

2.62

3.90

3.40

2.90

2.78

3.10

3.02

4.15

3.49

3.76

3.41

3.65

2.96

3.45

Discharge

(tKX*dJMQ

590

880

545

683

558

840

758

1,330

704

1,330

848

656

656

516

1,220

848

1,330

1,160

1,040

1,300

1,540

980

1,280

1,100

938

1,010

950

920

890

2,050

990

1,110

524

815

854

575

700

760

1,200

2,170

1,120

871

610

700

980

588

1,170

488

1,080

830

600

552

690

654

1,220

825

970

810

930

600

825

Animal floods

Orte

(M)

14

18

16

6

7

5

11

13

3

15

17

9

2

10

19

12

8

Recurrence 

intemu 

<v*n>

1.43

1.11

1.25

3.33

2.86

4.00

1.82

1.54

6.67

1.33

1.18

2.22

10.0

2.00

1.05

1.67

2.50

Partial 

duration series

Order

(M)

64

35

70

55

67

41

49

7

50

8

39

56

57"?3

13

40

9

17

23

10

5

-27

11

21

31

24

30

33

34

3

26

20

71

45

37

66

52

47

15

2

19

36

61

53

28

65

16

74

22

42

62

68

54

58

14

43

29

46

32

63

44

Recurrence 

interval 

(part)

0.31

.57

.29

.36

.30

.49

' .41

2.86

.40

2.50

.51

.36

,35

.27

1.54

.50

2.22

1.18

.87

2.00

4.00

.74

1.82

.95

.64

.83

.67

.61

.59

6.67

.77

1.00

.28

.44

.54

.30

.38

.42

1.33

10.0

1.05

.56

.33

.38

.71

.31

1.25

.27

.91

.48

.32

.29

.37

.34

1.43

.46

.69

.43

.62

.32

.45
MAQNITDDE AMD FREQUENCY OP FLOODS

KOOTENAI RIVER BASIN 

Boulder Creek near Leonla, Idaho Continued

Year

1947

1948

Month

April

Hay

Oct.

Apr.

May

Day

19

2

7

20

25

16

19

21 or

22

8

13

20

24

27

Gage 

height 

(f<*t)

4.43

5.09

4.76

3.69

3.62

4.07

7.85

4.64

4.66

4.90

5.71

5.96

6.42

Period 1929-33, 1935-48

Discharge 

<**<md-fi*t>

854

1,160

1,000

551

523

703

- 2,700

612

623

760

1,250

1,410

1,710

Annual floods

Older

(M)

1

4

R6CUTP6DC6

interval 

(V»art)

20. U

5.00

Partial 

duration series

Order

(M)

38

18

25

69

72

51

1

60

59

48

12

6

4

R6CUTP6DC6

interval 

from)

0.53

1.11

.80

.29

.28

.39

20.0

.33

.34

.42

1.67

3.33

5.00

1 , 264 Mean annual

d Between Apr. 19 and 23.

Moyle River at Elleen, Idaho

Location.- Lat. 48°46', long. 116°10', an eighth of a mile downstream from Skin Creek, a

quarter of .a mile southeast of Elleen, and 4 miles upstream from mouth. 

Drainage area.- 755 square miles.

Records available.- October 1925 to September 1948. 

Gage.- Non-recording gage read twice daily prior to June 1, 1928, recording gage thereafter. Qage datum lowered 1 foot Oct. 11, 1944.

Stage-discharge relation.- Defined by current-meter measurements below 5,200 second-feet. 

Maximum flood"of record.- 9,650 second-feet May 26, 1948. 

Remarks.- No diversion or regulation above station. Qage heights for period when nonrecofdlng gage was used are from graphs based on gage readings. Major change in

stage-discharge relation occurred during floods of May 1932.

Year

1926

1927

1928

1929

1950

1931

1932

1933

Month

Apr.

Apr.

May

June

Apr.

May

Apr.

May

June

Apr.

May

May

Apr,

May

June

Apr.

May

June

824933 O - 49 - 25

Day

20

30

28

17

10

28

19

29

24

9

14

15

27

21

31

7

15

14

23

14

22

2

29

15

31

16

Gage 

height 

<f"t)

3.64

3.90

4.46

4.80

4.80

3.97

4.82

3.07

4.33

3.60

3.56

3.36

3.97

3.68

4.00

3.70

3.95

3.50

3.53

4.15

4.24

3.90

4.02

3.70

4.16

4.05

Discharge

( axrndS**)

2,570

3,200

4,890

5,910

5,910

S 3,580

s6,150

1,860

4,820

2,760

2,660

2,260

3,540

2,930

3,680

2,930

3,540

2,720

2,820

6,340

6,840

5,120

5,670

4,310

6,390

5,820

Annual floods

Order

(M)

22

12

11

14

18

20

6

8

Recurrence 

interval 

Ammt)

1.09

2.00

2.18

1.71

1.33

1.20

4.00

3.00

Partial 

. duration series

(Mer

(M)

73

59

27

15

16

51

13

80

28

69

72

76

53

64

49

65

54

71

67

10

7

22

19

38

9

17

Recurrence 

interval 

Ammt)

0.33

.41

.89

1.60

1.50

.47

1.85

.30

.86

.35

.33

.32

.45

.38

.49

.37

.44

.34

.36

2.40

3.43

1.09

1.26

.63

2.67

1.41
350 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Moyie River at Eileen, Idaho, 1926-48

70

30

K 20

o 

z 

O 10

"S S 2

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

100 

90 

80 

70 

60 

50 

40 

30 

20 

10

i f

S

f

^

f

,

-* 

f

<~s

^- *** /

'

/

^

r

'

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 1,840 SECOND-FEET
MAGNITUDE AND FREQUENCY OP FLOODS 351

KOOTENAI RIVER BASIN 

Moyie River at Elleen, Idaho Continued

Year

1933

1934

1935

1936

1937

1938

1939

1940

1941

1941

1942

1943

1944

1945

1946

1947

1947 

1948

Month

Dec.

Apr.

May

Apr.

May

Apr.

May

May

June

Apr.

May

Apr.

May

Apr. 

May

May

Dec.

Apr.

May

June

Apr. 

May 

June

May

May

June

Apr.

May

Apr.

May 

June

Oct. 

Apr.

May

Day

23

9

14

29

16

21

26

6

23

20

23

26

5

12

5

27

20

18

1

26

4 

22

4 

16

15 

3 

12

2 

17

3 

20

14 

22

13 

27

5

28

19 

27 

19

9

6 

14

1

20 

26

6

2 

20

29

10 

10

19 

23 

30

26

Gg,

<f«t)

3.29

3.55

3.78

4.55

3.86

2.95

3.25

3.62

4.16

3.90

3.87

3.91

3.70

3.72

3.62

3.61

3.18

4.39

4.07

4.25

2.43 

3.03

3.54 

3.23

2.55 

2.97 

3.39

2.66 

3.24

3.62 

2.73

3.23

3.58 

4.23

3.89

3.82

4.35 

4.07 

3.40

2.50

4.97 

4.89

4.77

4.73 

5.07

5.41

3.52 

4.73

5.21

5.72 

4.36

4.57 

4.96 

4.78

6.51

Period 1926-48

Discharge

(teamd^ett)

3,030

3,780

4,620

8,780

4,950

2,380

2,940

3,850

6,230

4,900

4,770

4,950

4,110

4,150

3,850

3,820

2,800

7,680

5,730

7,020

1,860 

3,050

4,500 

3,550

2,010 

2,730 

3,630

2,190 

3,290

4,210 

2,300

t2,900 

3,240

4,070 

6,320

4,990

4,700

6,680 

5,500 

3,540

1,840

4,780 

4,530

4,180

4,350 

5,480

6,900

1,870 

4,350

6,030

7,210 

2,980

3,450 

4,500 

3,990

9,650

Annual floods

Order

(M)

2

10

13

17

3

16

19

21

9

7

23

15

5

4

1

R6CttvrGHQ6 

interval 

frwni>

12.0

2.40

1.85

1.41

8.00

1.50

1.26

1.14

2,67

3.43

1.04

1.60

4.80

6.00

24.0

Partial 

duration series

Order

(M)

61

48

32

2

24

74

63

45

12

26

30

25

42

41

46

47

68

3

18

5

81 

60

34 

52

78 

70 

50

77 

57

39 

75

66 

58

43 

11

23

31

8 

20 

55

82

29 

33

40

36 

21

6

79 

37

14

4 

62

56 

35 

44

1

interval

fo*m>

P. 39

.50

.75

12.0

1.00

.32

.38

.53

2.00

.92

.80

.96

.57

.58

.52

.51

.35

8.00

1.33

4»SO

.30 

.40

.71 

.46

.31 

.34 

.48

.31 

.42

.62 

.32

.36 

.41

.56 

2.18

1.04

.77

3.00 

1.20 

.44

.29

.83 

.73

.60

.67 

1.14

4.00

.30 

.65

1.71

6.00 

.39

.43 

.68 

.55

24.0

5,514 Mean annual 1

Estimated from dally discharge.

Computed on basis of records for station at Eastport.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN 

Deep Creek at Moravia, Idaho

Location.- Lat. 48°38', long. 116 q 24', at concrete highway bridge, 1 mile downstream

from Ruby Creek and 1 mile southwest of Moravia. 

Drainage area.- 133 square miles.

Records available . - May 1928 to September 1948 (no winter records prior to 1933) 

Gage.- Non- recording gage read once daily

Stage-discharge relation.- Defined by current-meter measurements below 1,290 second-feet. 

Maximum ^flood~of record. - 1,330 second-feet Dec. 22, 1933.

Remarks.- Small diversion above station for irrigation. Gage heights are from graphs 

based on gage readings.

Yew1929

1930

1931

1932

1932

1933

1933

1934.

1934

1935

1936

1937

1937

1938

1939

Month

May

June

Apr.

Apr.

May

Feb.

Apr.

May

June

Nov.

Dec.

Apr.

May

June

Dec.

Jan.

Apr.

May

Nov.

Jan.

Mar.

Apr.

May

Apr.

May

Apr.

May

June

Nov.

Dec.

Jan.

Mar.

Apr.

May

Mar.

Apr.

May

D*y

3

13

23

2

9

14

24

8

4

.14

27

4

14

8

22

3

13

13 -

2

3

29

14

26

9

15

22

4

23

1

8

14

28

11

7

25

14

22

25

7

22

25

4

15

29

4

20

25

30

15

16

18

3

26

26

5

19

30

15

Gage 

hei^t 

<f«*)

1.83

1.98

2.05

1.69

1.90

2.10

2.03

2.25

2.02

2.05

3.3

2.55

3.16

3.15

3.32

2.19

2.20

1.82

2.30

2.32

3.69

2.88

2.96

2.94

3.02

4.27

2.88

2.80

2.97

2.88

3.05

3.73

2.30

1.87

3.00

2.07

2.88

2.84

3.30

3.22

3.66

3.02

3.40

2.62

3.23

2.57

2.48

3.06

2.56

3.10

4.20

3.64

3.21

1.93

2.10

2.00

2.43

2.08

Duehaige

290

358

390

259

330

403

378

374

309

318

819

534

765

761

827

398

402

269

440

447

971

658

689

681

711

1,330

629

594

670

629

708

1,040

397

264

e400

328

675

656

825

790

950

639

830

502

745

484

453

686

506

735

1,260

955

745

311

360

331

459

354

Annual floods

fete

(M)

18

17

19

11

7

1

12

8

10

3

16

Beearrene* 

farteral 

fr-rrf

1.17

1.23

1.10

1.91

3.00

21.0

1.75

2.62

2.10

7.00 .

1.31

Partial 

duration aeries

<M«r

(M)

94

80

73

100

86

68

75

76

92

90

19

53

26

27

17

71

69

98

64

63

8

39

34

36

32

1

44

49

38

45

33

6

72

99

70

87

37

40

18

24

10

42

16

57

28

58

61

35

56

31

3

9

29

91

78

85

60

81

Recurrence 

farteral 

(V*n>

0.22

.26

.29

.21

.24

.31

.28

.28

.23

.23

1.10

.40

.81

.78

1.23

.30

.30

.21

.33

.33

2.62

.54

.62

.58

.66

21.0

.48

.43

.55

.47

.64

3.50

.29

.21

.30

.24

.57

.52

1.17

.88

2.10

.50

1.31

.37

.75

.36

.34

.60

.38

.68

7.00

2.33

.72

.23

.27

.25

.35

.26
MAGNITUDE AND FREQUENCY OF FLOODS 

Deep Creek at Moravia, Idaho, 1929-48

14 

12

10 

B 

6

4

fcUl , 

U. 2

0

o o o u

Ul

in 

u. 

O j 

in

SOf

o

z 

o 

7 

z 

ui

15 

Of

0

in 

o

14 

12 

10 

8 

6 

4 

2 

0

/

/"

-f^

/

I

!

|

/

i 

I

^

/

9

 

/

/

t>~ .»- _ *

8

0 QCM eo * m OtnoooQ OQG 

-< 35 " -< CM eo 9 in ° 2 K

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

«

X

/

^

^ r

S

* ' ^

~s* s ~~* _^ » ./ /

--

_» -

*

*

nj-*io O o o o 

RECURRENCE INTERVAL, IN"YEARS, FOR FLOODS ABOVE 244 SECOND-FEET
354 FLOODS OF MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN 

Deep Creek at Moravia, Idaho Continued

Year

1940

1941

1941

1942

1943

1944

1945

1946

1947

1947

1948

Month

Mar.

May

May

Dec.

Apr.

May

June

Apr.

May

June

Apr.

Apr.

May

June

Mar.

Apr.

May

June

Feb.

Mar.

Apr.

May

Oct.

Jan.

Feb.

Apr.

May

June

Day

27

2

11

17

3

20

14

12

27

26

3

9

16

1

26

17

12

22

6

15

4

27

19

26

29

5

6

15

24

2

20

29

8

26

20

15

18

3

22

9

13

24

4

Gage 

height 

(f*t>

2.75

2.08

2.10

2.72

3.18

3.58

2.35

1.88

2.46

1.94

2.92

3.50

4.12

3.05

2.81

2.23

1.88

2.04

4.46

3.45

2.50

2.50

3.42

3.48

3.45

3.98

2.72

2.32

2.14

2.62

3.00

3.00

3.36

2.20

2.66

2.00'

2.16

2.10

5.68

3.60

3.78

4.12

3.02

Period 1929-48

Discharge 

(««md-/«t)

570

354

3£0

558

742

921

420

284

453

300

618

862 

1,110

626

536

346

244

289

1,280

792

430

430

779

806

792

1,040

. 525

382

327

480

626

637

802

361

511

277

324

348

932

860

941

1,110

649

Annual floods

Order

(M)

14

15

9

4

20

2

6

13

5

R6CUIT6&66

interval 

(ytoiFv

1.50

1.40

2.33

5.25

1.05

10.5

3.50

1.62

4.20

Partial 

duration series

Order

(M)

50

82

79

51

30

13

67

96

62

93

48

14

4

47

52

84

101

95

2

22

65

66

25

20

23

7

54

74

88

59

46

43

21

77

55

97

89

83

12

15

11

5

41

interval

A.____i (yMfw

0.42

.26

.27

.41

.70

1.62

.31

.22

.34

.23

.44

1.50

5.25

.45

.40

.25

.21

.22

10.5

.95

.32

.32

.84

1.05

.91

3.00

.39

.28

.24

.36

.46

.49

1.00

.27

.38

.22

.24

.25

1.75

1.40

1.91

4.20

.51

813 Mean annual

e Estimated; stage-discharge relation affected by ice.

Smith Creek near Porthili; Idaho

Location.- Lat. 48°57'40", long. 116"33'20", at 0. S. Forest Service bridge, 1 mile south

of Smith Creek ranger station and 4 miles southwest of Porthill. 

Drainage area.- 70 square miles. 

Records available.- May 1928 to September 1948 (no winter records 1928-30, 1932-34, incomplete records 1945). 

Gage.- Non-recording gage read once daily prior to Apr. 20, 1929, recording gage thereafter. Datum of non-recording gage was 2.67 feet lower than that of recording gage. 

Stage-discharge relation.- Defined by current-meter measurements below 1,500 second-feet. 

Maximum flqod~of record.- 3,150 second-feet May 17, 1941. 

Remarks.- No diversion or regulation above station.
MAGNITUDE AND FREQUENCY OP FLOODS 

Smith Creek near Porthill, Idaho, 1929-44, 1946-48

355

28

10

,.

/

/

i c

/

3

?~*.^

9 ^

/

,- '

tr

/

'

 4

/

'

If

/

)

/

/

/

C

^~-

3 U

- ^

 > c> =» <;? <;

-

1-1 CM to

> s s? s

RECURRENCE INTERVAL. IN YEARS, FOR ANNUAL FLOODS

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 830 SECOND-FEET
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

KOOTENAI RIVER BASIN 

Smith Creek near Porthill, Idaho Continued

Tear

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1941 

1942

1943

1944

1945f

1946

Month

May

June

Apr.

May

May

May

June

May

June

Apr.

May

May

June

Apr.

May

May

June

Apr.

May

June

Apr.

May

May

May

Dec. 

May

June

Apr.

May

June

July

May

May

May

June

Day

14

22

31

9

14

14

24

20

6

14

13

20

2

13

26

30

4

14

13

28

8

15

25

22

30

5

25

4

14

29

26

2

19

18

1

25

13

29

3

15

29

3

11

23

1

17

2

23

7

15

20

26

9

17

4

9

6

14

5

8

13

17

25

3

6

14

20

Gage 

height 

(f**)

4.65

5.35

4.69

4.87

4.87

4.50

4.95

4.75

4.85

5.45

5.47

5.58

5.12

5.16

5.50

5.55

5.68

7.15

4.60

6.20

5.02

5.56

5.51

5.61

5.48

5.35

4.65

5.33

5.58

4.67

5.37

5.44

5.68

6.30

5.00

6.35

5.23

5.35

5.41

5.50

4.66

4.93

5.44

4.95

4.83

7.36

7.00 

5.48

4.58

4.92

4.98

5.60

5.10

6.00

4.58

4.42

4.68

4.79

5.12

4.99

5.02

5.45

5.88

5.16

5.86

4.83

4.54

Discharge 

(Wwm*/«<>

1,010

1,480

1,040

1,140

1,140

920

1,210

1,080

1,140

1,560

1,380

1,490

1,150

1,180

1,420

1,460

1,570

3,060

830

1,960

1,060

1,440

1,400

1,520

1,440

1,340

858

1,300

1,470

858

1,300

1,360

1,550

2,050

1,060

2,100

1,220

1,300

1,330

1,400

840

1,020

1,360

1,020

960

3,150

2,750 

1,430

830

1,020

1,130

1,550

1,200

1,870

890

830

950

1,040

1,210

1,120

1,140

1,460

1,870

1,340

1,890

1,110

934

Annual floods

Older

(M)

14

18

10

13

2

6

12

15

11

5

16

17

1

3

8

19

7

Recurrence 

interval 

(yeond

1.43

1.11

2.00

1.54

10.0

3.33

1.67

1.33

1.82

4.00

1.25

1.18

20.0

6.67

2.50

1.05

2.86

Partial 

duration series

Order

(M)

67

23

63

51

52

71

45

59

53

18

33

22

50

49

30

25

17

2

78

8

60

27

31

21

28

36

76

39

24

75

40

34

19

6

61

5

44

41

38

32

77

65

35

64

69

1

3 

29

79

66

55

20

47

10

74

80

46

56

54

26

11

37

9

57

70

Recurrence 

interval 

(vtan)

0.30

.87

.32

.39

.38

.28

.44

.34

.38

1.11

.61

.91

.40

.41

.67

.80

1.18

10.0

.26

2.50

.33

.74

.64

.95

.71

.56

.26

.51

.83

.27

.50

.59

1.05

3.33

.33

4.00

.45

.49

.53

.62

.26

.31

.57

.31

.29

20.0

6.67

 COby

«25

[SO

o 36

1.00

 43

2! oo

.27

.25

.43

.36

.37

.77

1

QO

 Ot,

C.A 

 O*

2 0 22

1 35

.29
MAGNITUDE AMD FREQUENCY OP FLOODS 357

KOOTENAI RIVER BASIN 

Smith Creek near Porthlll, Idaho Continued

Year

1947

1947

1948

Month

Apr. .

May

June

Oct.

May

June

Day

29

8

21

26

30

9

16

19

21

27

2

7

11

16

24

Gage 

height 

(ft*)

4.72

5.64

4.59

5.13

4.49

4.97

4.81

6.32

6.04

7.37

6.23

6,42

6.04

5.38

4.82

Period 1929-44, 1946-48

Discharge 

(teeandjttt)

1,060

1,610

978

1,290

910

1,190

1,100

2,040

1,580

2,480

1,740

1,850

1,620

1,230

911

Annual floods

Order

(M)

9

4

Recurrence 

interval

(vran)

2,22

5.00

Partial 

duration series

Order

(M)

62

15

68

42

73

48

58

7

16

4

13

12

14

43

72

Recurrence 

interval

<V*»rt>

0.32

1.33

.29

.48

.27

.42

.34

2.86

1.25

5.00

1.54

1.67

1.43

.46

.28

1,828 Mean annual

Incomplete year.

Boundary Creek near Porthill, Idaho 

(International gaging station)

Location.- Lat. 48°59'50", long. 116°34'05", 140 feet downstream from bridge at mouth 

of canyon, 0.2 mile south of international boundary, and 3 miles west of Porthill.

Drainage area.- 97 square miles.

Records available.- May 1928 to September 1948 (no winter records for water years 1929- 

307T

Page.- Non-recording gage read two or three times weekly during summer months prior to 

April 24, 1929, recording gage thereafter.

Stage-discharge relation.- Defined by current-meter measurements below 1,430 secondfeet.

Maximum flood of record.- 2,530 second-feet May 28, 1948.

Remarks.- No diversion above station. This is one of the international gaging stations 

maintained by the United States under agreement with Canada.

Year

1929

1930

1931

1932

1933

1934

1935

1936

Month

May

June

Apr.

Majr

May

May

June

Apr.

May

June

Apr.

May

May

June

Apr.

May

Day

14

23

31

8

24

20

6

13

12

20

£

13

28

15

26

30

4

15

13

28

15

24

5

22

30

5

25

4

14

27

Gage 

height 

(feet)

3.56

4.02

3.49

3.63

3.50

3.61

3.51

4.03

4.25

4.44

3.98

4.02

3.29

3.38

4.43

4.30

4.62

5.22

3.46

4.66

4.20

3.92

3.24

4.45

4.25

4.07

3.67

4.04

4.37

3.40

Discharge 

( eeondfett)

988

1,300

955

1,050

950

1,020

950

1,320

1,510

1,680

1,310

1,310

820

885

1,680

1,590

1,860

2,400

851

1,760

1,370

1,160

747

1,600

1,440

1,280

968

1,250

1,490

815

Annual floods

Older

(M)

17

19

15

9

2

7

12

13

Recurrence 

interval

QPMFV

1.24

1.10

1.40

2.33

10.5

3.00

1.75

1.62

Partial 

duration series

Order

(M)

57

35

62

52

63

53

64

31

21

11

33

34

74

69

12

19

7

2

70

9

26

44

78

18

24

36

58

38

22

75

R6CQTT0nC6

interval 

fyean>

0.37

.60

.34

.40

.33

.40

.33

.68

1.00

1.91

.64

.62

.28

.30

1.75

1.10

3.00

10.5

.30

2.33

.81

.48

.27

1.17

.88

.58

.36

.55

.95

.28
1.0

10

40

RO

%

k

\v~

-V*1

^

v

X

^

N

*

 \

\

1. 01

1.10

70

o 1-50

C 

70

m 0 m 2 o

Z 3

m 

? 4

Zm

w 10 

 n

* 15

> 

Z 20

Z ^u

^ 30

 n

g 50

U)

200
MAGNITUDE AND FREQUENCY OF FLOODS

KOOTENAI RIVER BASIN 

Boundary Creek near Porthlll, Idaho Continued

Year

1937

1938

1939

1940

1941

1941

1942

1943

1944

1945

1946

1947

1947

1948

Month

May

June

?T

June

June

Apr.

May

May

May

Dec.

May

Apr.

May

June

May

May

June

Apr.

May

June

Apr.

May

June

Oct.

May

June

Day

26

2

18

18

1

25

13

29

3

15

29

3

11

1

17

2

23

20

26

9

17

15

6

14

31

4

26

6

8

13

17

25

2

6

14

20

29

7

21

26

2

9

13

19

13

28

7

11

16

24

Gage 

height 

(/ *>

3.98

4.07

3.56

3.55

3.76

5.12

3.85

3.80

3.93

4.13

3.35

3.43

4.01

3.65

5.1

3.88

4.50

3.71

4.45

3.84

5.05 .

3.23

3.33

3.70

4.54

4.18

3.23

4.07

3.94

3.90

4.20

4.83

4.07

4.40

3.76

3.47

3.78

4.54

3.54

4.07

3.57

3.73

3.48

4.64

3.23

5.34

4.38

4i32

3.51

3.38

Period 1929-48

Discharge 

( econdjeet)

1,280

1,320

960

960

1,100

2,270

1,160

1,130

1,240

1,400

840

830

1,200

1,020

2,300

1,200

1,610

990

1,630

1,160

2,140

746

767

1,000

1,640

1,350

758

1,340

1,240

1,210

1,450

1,970

1,370

1,650

1,140

938

1,100

1,690

931

1,330

966

1,080

910

1,790

746

2,530

1,630

1,570

938

839

Annual floods

Older

(M)

16

4

14

18

3

11

5

20

10

6

8

1

Recurrence 

interval 

(»an>

1.31

5.25

1.50

1.17

7.00

1.91

4.20

1.05

2.10

3.50

2.62

21.0

Partial 

duration series

Order

(M)

37

32

60

61

49

4

45

48

39

25

71

73

42

54

3

43

17

56

15

46

5

79

76

55

14

28

77

29

40

41

23

6

27

13

47

65

50

10

67

30

59

51

68

8

80

1

16

20

66

72

Recurrence 

interral 

f*«r«>

0.57

.66

.35

.34

.43

5.25

.47

.44

.54

.84

.30

.29

.50

.39

7.00

.49

1.24

.38

1.40

.46

4.20

.27

.28

.38

1.50

.75

.27

.72

.52

.51

.91

3.50

.78

1.62

.45

.32

.42

2.10

.31

.70

.36

.41

.31

2.62

.26

21.0

1.31

1.05

.32

.29

1,669 Mean annual
360 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

PEND OREILLE RIVER BASIN 

Clark Pork above Mlssoula, Mont.

Location.- Lat. 46°53', long. 113°56', 3 miles downstream from Blackfoot-River and

3 miles east of Mlssoula, 

Drainage area.- 5,740 square miles. 

Records available.- March 1929 to September 1948. 

gage.- Recording. 

Stage-discharge reet. relation.- Defined by current-meter measurements below 26,000 secondMaximum flood of record.- 31,500 second-feet May 23, 1948.

Remarks.- Some regulation by power plant at Bonner. Several small diversions above 

station for Irrigation. For frequency study, flood peaks affected by regulation 

are adjusted to their natural values. When annual peak Is so affected, both-unadjusted and adjusted values are listed, except latter figure Is omitted when 

smaller than base flood.

Year

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

Month

Apr.

May

May

June

May

June

Apr.

June

Apr.

May

June

May

Apr.

May

June

May

June

May

June

July

Mar.

May

June

May

June

Apr.

May

June

Day

28

5

31

17

21

14

14

22

17

30

2

5

13

14

25

9

8

24

25

12

26

6

16

2

9

5

29

18

3

29

30

25

4

22

5

5

18

20

13

6

6

23

27

9

12

Gage 

height 

(f*t)

6.54

6.30

5.84

4.20

4.36

7.65

h?.40

7.60

6.75

4.90

9.90

9.40

8.42

7.40

8.00

7.40

5.80

6.50

6.74

4.80

5.96

6.48

7.51

6.06

5.85

5.80

4.68

4.23

5.96

9.85

10.01

7.00

6.45

4.30

7.10

h6.95

6.06

4.50

5.17

4.89

h4.80

5.10

8.80

7.72

9.58

Discharge 

(teamd-feet)

g9,200

8,660

7,350

3,880

<54,150

812,800

hi 2, 200

12,800

10, 300

5,410

& 21, 600

19,700

g!5,300

12,300

14,100

12,300

7,790

9,710

g>10,300

5,300

8,330

9,700

12,600

8,600

7,790

S7.790

4,940

4,020

7,540

19,100

819,700

10,700

9,060

4,260

611,000

hlO,700

8,380

4,680

6,140

£5,400

h5,170

6,000

16,400

13,000

819,100

Annual floods

Order

(M)

14

19

8

3

7

12

9

18

4

10

16

17

6

R6CUZT8DC6

interval 

frw>

1.43

1.05

2.50

6.67

2.86

1.68

2.22

1.11

5.00

2.00

1.25

1.18

3.33

Partial 

duration series

Older

(M)

25

35

50

16

12

19

42

3

14

10

15

32

21

43

29

22

13

27

31

46

49

33

4

17

24

48

18

28

47

40

44

41

7

11

R6CUZT8DC6

intenwl 

frw>

0.80

.57

.40

1.25

1.67

1.05

.48

6.67

1.43

2.00

1.33

.62

.95

.46

.69

.91

1.54

.74

.65

.44

.41

.61

5.00

1.18

.83

.42

1.11

.72

.43

.50

.46

.49

2.86

1.81
MAGNITUDE AMD FREQUENCY OP FLOODS 

Clark Pork above Missoula, Mont., 1930-48

361

35

30

25

20

15

10

fe s

« » ** 2 S 8 g § g 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

0

S2 35

30

25

20

15

10

5

0

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 3,880 SECOND-FEET
362 FLOODS OP MAY-JJJNE 1948 IN COLUMBIA RIVER BASIN

PEND OREILLE RIVER BASIN 

Clark Pork above Mlssoula, Mont. Continued

Year

1943

1944

1945

1946

1947

1948

Month

Mar.

Apr.

May

June

May

June

Apr.

June

May

May

June

Apr.

May

Day

28

3

20

21

31

20

20

20

18

29

18

7

7

7

29

9

10

10

24

23

heignt 

</«*>

4.70

5.28

9.50

8.37

8.82

9.27

5.99

h5.90

5.40

5.66

5.30

6.75

h6.67

5.57

6.84

11.10

10.73

8.36

6.30

13.07

Period 1930-48

Discharge

5,110

6,470

g 18, 700

15,100

16,400

18,000

g8,230

h?,970

6,710

7,460

6,330

g9,860

h9,590

7,050

10,100

g 24, 200

22,800

14,800

8,630

J 31, 500

Annual floods

Order

(M)

5

15

13

11

2

1

interval

4.00

1.33

1.54

1.82

10.0

20.0

Partial 

duration series

Order

(M)

45

38

8

6

5

30

37

34

39

23

36

20

2

9

26

1

Recurrence 

interval

0.44

.53

2.50

3.33

4.00

.68

.54

.59

.51

.87

.56

1.00

10.0

2.22

.77 -

20.0

12,830 Mean annual

g Result of regulation; not used In frequency study.

n Adjusted for storage.

J Partly regulated.

Clark Fork below Mlssoula, Mont.

Location.- Lat. 46°52', long. 114°07 ! , 2 miles downstream from Bltterroot River and

6 miles west of Mlssoula. 

Drainage area.- 8,690 square miles.

Records available.- October 1929 to September 1948 (1934 fragmentary). 

Gage.- Recording. 

Stage-discharge relation.- Defined by current-meter measurements below 46,900 seeondfeet.

Maximum flood of record.- 52,800 second-feet May 23, 1948. 

Remarks \ - Some regulation by power plant at Bonner. Many diversions above station for

irrlgablon.

Year

1930

1931

1932

1933

1934

1935

1936

1937

Month

Apr.

May

May

May

June

Apr.

June

Apr.

May

June

May

Apr.

May

June

May

Day

26

22

31

18

15

23

17

29

11

15

26

9

8

25

26

6

16

2

9

27

Gage 

height 

(fat)

6.32

5.50

6.20

5.08

7.97

8.12

7.27

5.15

10.14

7.21

8.00

7.44

5.96

6.80

6.57

7.02

8.34

7.09

6.22

5.09

Discharge 

( econd-fett)

17,500

13,900

17,100

12,200

24,400

25,000

21,000

12,400

36,800

21,300

25,700

22,400

15,200

20,200

18,200

20,200

26,700

20,700

16,300

11,700

Annual floods

Older

(M)

14

17

9

3

8

11

7

18

Rsjcurmtoo 

interval 

<V«>n)

1.43

1.18

2.22

6.67

2.50

1.82

2.86

1.11

Partial 

duration series

Order

(M)

25

35

26

42

13

11

15

41

3

_

-

-

-

17

24

18

9

16

27

43

Rsjcurmtoo 

interval 

(Vtart>

0.76

.54

.73

.45

1.46

1.73

1.27

.46

6.33

_

' -

-

-

1.12

.79

1.06

2.11

1.19

.70

.44
MAGNITUDE AND FREQUENCY OF FLOODS 

Clark Pork below Missoula, Mont.

193O-48

w 3 8 2 

o - j «

8 S

RECURRENCE INTERVAL. IN YEARS, FOR ANNUAL FLOODS

o

z

g «

K

5 50 

tf) 

O 

45

40 

35 

30 

25 

2O 

15 

10 

5 

Q

f\

1*

ft t

r<

193O-3

_. s

J

3, 1

»-

y

33E

\A

-41

r

j

*-

1

/

/

X

j

o o o o ^ CM co ^ m

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 10,400 SECOND-FEET
364 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

PEHD OREILLE RIVER BASIN 

Clark Pork below Missoula, Mont. Continued

Year

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

Apr.

May

June

May

May

June

Apr.

May

June

Mar.

Apr.

June

May

June

May

June

May

May

June

Apr.

May

Day

20

2

30

19

25

5

18

31

13

2

23

27

10 .

30

20

1

20

20

2

18

7

2

23

6

29

10

10

23

23

Gage 

height 

(f*t>

5.42

6.12

10.00

6.68

6.99

7.29

6.72

5.90

5.56

4.61

4.83

8.96

7.87

5.79

8.42

9.00

9.47

5.36

5.19

5.58

5.33

6.66

5.91

5.37

6.72

11.18

8.23

5.87

12.08

Period 1930-1948

Discharge 

( eamd-fett)

12,800

15,900

35,700

18,700

20,200

22,000

19,100

15,600

14, 200

10,400

11,500

30,500

25,000

15,200

27,500

30,500

33,200

13,500

12,700

14,400

13,100

19,100

15,600

13,800

19,700

45,900

26,000

14,800

52,800

Annual floods

Order

(M)

4

10

16

19

6

5

15

13

12

2

1

Recurrence 

interval 

(y0um)

5.00

2.00

1.25

1.05

3.33

4.00

1.33

1.54

1.67

10.0

20.0

Partial 

duration series

Order

(M)

39

28

4

23

19

14

21

29

34

45

44

6

12

31

8

7

5

37

40

33

38

22

30

36

20

2

10

32

1

ftoCtZTTBDM interval 

CyMm)

0.49

.68

4.75

.83

1.00

1.36

.90

.66

.56

.42

.43

3.17

1.58

.61

2.38

2.71

3.80

.51

.48

.58

.50

.86

.63

.53

.95

9.50

1.90

.59

19.0

24,930 Mean annual 1

Clark Pork at St. Regls, Mont.

Location.- Lat. 47°18', long. IIS'OS', at St. Regls and half a mile downstream from

St. Regls River.

Drainage area.- 10,500 square miles.

Records available.- October 1910 to September 1923, February 1929 to September 1948. 

Gage.- Non-recording gage read once dally prior to Nov. 29, 1933, recording gage

thereafter. 

Stage-discharge relation.- Defined by current-meter measurements below 67,400 secondfeet.

Maximum flood of record.- 68,900 second-feet May 24, 1948. 

Remarks.- Some regulation. Many diversions above station. Gage heights for period

when non-recording gage was used are from graphs based on gage readings.

Tear

1911

1912

1913

1914

Month

May

June

May

June

May

May

June

Day

8

14

23

12

4

13

30

10

15

15

23

(ftet)

11.5

13.9

15.1

15.5

14.0

14.1

19.2

13.4

14.2

12.4

10.0

Discharge 

( Kondrftet)

23,400

33,800

39,500

41,400

34,300

34,800

63,500

31,200

35,000

26,700

17,300

Annual floods

Older

(M)

17

11

2

15

Recurrence 

interval

(yean)

2.00

3.09

17.0

2.27

Partial 

duration series

Order

(M)

59

33

19

16

30

28

2

40

26

50

74

Recurrence 

interval

(limn)

0.58

1.03

1.79

2.12

1.13

1.21

17.0

.85

1.31

.68

.46
70

50

30

LU 

LU

i 20

z 

o

O 15

LU a 

CO

0 10

'

/*-

,*-

p

^

-^

1 

)

.>

LV

rfy

x

^

4J-

/

'

x

/

s

/

'

S

OJ COTflf) OlAOOOO OQ 

 -« ^-»CM ro^in p<n

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

RECURRENCE INTERVAL. IN "YEARS, FOR FLOODS ABOVE 12.000 SECOND-FEET 

824933 0-49-26

p o
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

PEND OREILLE RIVER BASIN 

Clark Fork at St. Regis, Mont. Continued

Year

1915

1916

1917

1918

1919

1920

1921

1922

1923

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

Month

June

Mar.

Apr.

May

June

July

Apr.

May

June

Apr.

May

June

Apr.

May

May

June

May

May

June

Apr.

May

June

May

June

Apr.

June

May

May

June

Apr.

June

Dec.

Mar.

Apr.

May

June

May

Apr.

May

June

May

Apr.

May

May

May

June

Day

21

22

27

8

19

20

1

18

27

29

11

19

14

25

2

7

2

14

27

29

31

18

17

28

8

27

8

20

29

26

12

26

11

26

1

17

15

23

17 -

29

11

23

31

26

9

9

25

26

7

17

3

28

18

3

31

5

19

13

3

Gage 

height 

(/**)

10.0

9.65

13.1

14.4

15.1

17.5

16.8

14.0

9.2

18.5

16.4

17.4

11.25

14.2

16.0

14.9

13.0

16.7

13.4

10.4

13,0

13.6

13.6

15.5

9.6

15.8

16.5

9.0

9.2

13.3

13.8

13.7

11.8

11.30

10.5

9.55

13.60

13.70

12.1

10.20

16.85

14.10

11.43

14.27

12.92

10.39

12.36

12.19

12.37

14.16

12.08

10.06

11.01

11.35

16.00

12.81

11.92

10.38

8.82

Discharge 

(Mtxmd-feet)

17,300

15,900

29,800

36,000

39,600

53,000

48,900

34,000

14,500

59,100

46,700

52,400

21,800

35,000

44,500

38,500

29,300

48,400

31,200

18,800

29,300

32,100

32,100

41,800

15,900

43,400

47,200

13,800

14,500

30,700

33,100

32,600

24,200

22,200

19,200

15,900

32,300

32,700

25,400

18,000

49,000

34,700

22,400

35,700

29,000

18,200

27 , 400

24,800

25,700

34,000

24,400

17,100

20,400

22,100

46,400

26,100

22,600

17 , 200

12,000

Annual floods

Order

(M)

28

5

3

7

22

21

10

8

18

20

27

32

19

6

14

23

16

30

9

24

29

33

Recurrence 

interval 

(yean)

1.22

6.80

11.3

4.86

1.55

1.62

3.40

4.30

1.89

1.70

1.26

1.06

1.79

5.67

2.43

1.48

2.12

1.13

3.78

1.42

1.17

1.03

Partial 

duration aeries

Order

(M)

75

80

44

22

18

5

8

32

85

3

11

6

65

27

13

21

45

9

41

70

46

38

39

15

81

14

10

89

86

43

34

36

56

62

68

82

37

35

53

73

7

29

61

24

47

71

49

54

52

31

55

77

66

64

12

51

60

76

90

Recurrence 

intervv 

(vear*)

0.45

.42

.77

1.54

1.89

6.80

4.25

1.06

.40

11.3

3.09

5.67

.52

1.26

2.62

1.62

.75

3.78

.83

.49

.74

.90

.87

2.27

.42

2.43

3.40

.38

.40

.79

1.00

.94

.61

.55

.50

.42

.92

.97

.64

.47

4.86

1.17

.56

1.42

.72

.48

.69

.63

.65

1.10

.62

.44

.51

.53

2.83

.67

.57

.45

.38
MAGNITUDE AND FREQUENCY OP FLOODS 367

PEND OREILLE RIVER BASIN 

Clark Fork at St. Regis, Mont. Continued

Year

1942

1943

1944

1945

1946

1947

1948

Month

Apr.

May

June

Mar.

Apr.

June

May

June

May

June

May

Dec.

May

June

Apr.

May

Day

23

28

11

30

21

1

21

21

2

18

8

2

23

7

30

15

10

11

24

24

Gage 

height 

(f*t)

9.64

14.22

12.84

10.00

14.47

15.23

15.69

9.84

9.57

9.94

10.83

12.05

10.60

11.02

12.03

9.65

17.91

13.58

11.63

19.96

Period 1911-23, 1929-48

Discharge 

( eamdfiHt)

14,900

35,800

28,500

16,400

35,300

38,800

41,300

15,100

14,300

16,000

18,900

23,900

18,100

19,700

23,900

14,300

54,600

31,000

22,200

68,900

Annual floods

Order

(M)

13

12

31

25

26

4

1

Recurrence 

interval

& «*>

2.62

2.83

1.10

1.36

1.31

8.50

34.0

Partial 

duration series

Order

(M)

84

23

48

78

25

20

17

83

87

79

69

57

72

67

58

88

4

42

63

1

Recurrence 

interval

(»««rt)

0.40

1.48

.71

.44

1.36

1.70

2.00

.41

.39

.43

.49

.60

.47

.51

.59

.39

8.50

.81

.54

34.0

35, 380 Mean annual
368 FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN

PEND OREILLE RIVER BASIN 

Clark Pork near Plains, Mont.

Location.- Lat. 47°26', long. 114°51', 2 miles upstream from Plains and 6 miles downstream from Plathead River.

Drainage area.- 19,900 square miles.

Records available.- October 1910 to September 1948 (1934 partly estimated).

gage.- Recording. Datum of gage is 2,449.34 feet above mean sea level, datum of 1929.

Stage-discharge feet. relation.- Defined by current-meter measurements below 128,000 secondMaximum flood of record.- 134,000 second-feet June 5, 1948.

Remarks.- Flow somewhat affected by natural storage in Plathead Lake. Some regulation 

by FTathead Lake since the completion of Kerr Dam Apr. 12, 1938; usable capacity, 

1,219,000 acre-feet. Many diversions above station for irrigation.

Year

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

June

June

May

June

May

July

May

June

May

June

May

June

May

June

June

May

May

May

June

May

June

June

May

May

June

May

June

May MayMay

May

June

May

June

May

June

July

Apr.

June

June

June

May

June

July

May

June

Oct.

June

Day

11

5

25

7

9

2

30

20

7

16

31

18

28

9

14

20

22

6

14

28

11

1

19

24

17

10

3

17

30

31

20

20

27

6

29

11

16

1

22

22

6

13

4

24

30

26

5

11

30

23

5

Gage 

height 

<fi*t)

14.0

17.94

13.1

9.76

17.9

' 16.6

17.0

13.3

16.45

13.8

13.8

16.0

17.25

15.5

14.0

16.55

11.0

17.6

18.41

12.95

10.76

10.85

14.53

18.00

14.01

13.27

14.38

11.05

14.98

13.07

9.97

10.88

8.91

13.14

13.65

11.62

10.75

12.57

15.30

9.16

9.27

13.66

12.08

13.33

10.58

9.12

16.41

10.60

9.40

19.17

Period 1912-48

Discharge

(teeond-feet)

74,500

115,000

67,000

37,900

k67,400

115,000

102,000

106,000

69,100

100,000

73,800

73,800

100,000

114,000

96,500

80,300

106,000

47,800

117,000

126,000

67,300

47,300

47,300

83,600

120,000

76,800

71,200

81,800

50,000

88,000

68,000

40,500

48,100

32,200

69,000

74,000

54,900

47,300

64,000

92,500

35,400

36,200

74,900

59,200

70,900

46,200

34,700

104,000

46,200

36,900

134,000

Annual floods

Order

(M)

21

5

29

35

6

8

11

23

24

12

7

13

18

9

32

4

2

28

33

34

16

3

19

25

17

30

15

27

31

37

22

14

36

20

26

10

1

K6CU1T6OO6

interval

(v*m>

1.81

7.60

1.31

1.08

6.34

4.75

3.45

1.65

1.58

3.17

5.43

2.92

2.11

4.22

1.19

9.50

19.0

1.36

1.15

1.12

2.37

12.7

2.00

1.52

2.24

1.27 '

2.53

1.41

1.23

1.03

1.73

2.71

1.06

1.90

1.46

3.80

38.0

Partial 

duration series

Older

(M)

21

5

33

46

31

6

11

8

28

12

23

24

13

7

14

19

9

39

4

2

32

41

40

17

3

25

18

37

16

30

45

38

51

29

22

36

42

34

15

49

48

20

35

27

43

50

10

44

47

1

Recurrence 

interval

fii.Bl ai fynMP

1.76

7.40

1.12

.80

1.19

6.17

3.36

4.62

1.32

3.08

1.61

1.54

2.85

5.28

2.64

1.95

4.11

.95

9.25

18.5

1.16

.90

.92

2.18

12.3

1.48

2.06

1.00

2.31

1.23

.82

.97

.73

1.28

1.68

1.03

.88

1.09

2.47

.76

.77

1.85

1.06

1.37

.86

.74

3.70

.84

.79

37.0

81,590 Mean annual

Estimated.
MAGNITUDE AND FREQUENCY OP FLOODS 

Clark Fork near Plains, Mont., 1912-48

369

130 

120 

110 

100 

90 

80 

70 

60

l_ W 

UJ 

i <°

§ 30

u_ 

O 

«o e

Q

1

O

X

z 

£130

Of

5 120 

£ 

Q

S

^

r*" 1

"

^

4

\

1*

j> ^

r

 -* -'^

X

^

^

? § 2 8 N » * «» 22gg§S |S^ 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

\

j

t

J

f

1

*

/

J

S

^

'r

i

i *^ f

^

"' ^

!

o o o

RECURRENCE INTERVAL. IN YEARS, FOR FLOODS ABOVE 32,200 SECOND-FEET
S70 FLOODS OP MAY-JOKE 1948 IN COLOMBIA RIVER BASIN

PEHD OREILLE RIVER BASIN 

Pend Orellle River below Z Canyon, near Metallne Palls, Wash.

(Formerly called Clark Pork) 

(International gaging station)

Location.- Lat. 48°59", long. 117°21', three-quarters of a mile downstream from Z 

Canyon, 1£ miles south of International boundary, 5 miles downstream from Slate 

Creek, and 10 miles downstream from Metaline Palls. Prior to Oct. 1, 1928, at 

sites at Metaline Palls and Newport, Wash., and Priest River, Idaho.

Drainage area.- 25,200 square miles at sites below Z Canyon and at Metaline Palls; 

24,ZOO square miles at Newport and Priest River.

Records available.- June 1903 to April 1905 at Priest River, Idaho} May 1905 to

September 1912 at Newport, Wash., except during most of the winter months; October 

1912 to September 1928 at Metaline Palls; October 1928 to September 1948 below Z 

Canyon, near Metaline Falls.

Qage.- Non-recording gage read once daily prior to Oct. 1, 1928; recording gage thereafter. Datum of Z Canyon gage is 1,721.80 feet above mean sea level, datum of 1929 

(levels by Corps of Engineers).

Stage-discharge relation.- Defined by current-meter measurements.

Maximum TIdod of record^- 171,300 second-feet June 13, 1948.

Historical data.- Maximum discharge known, 195,000 second feet (revised), estimated, 

in June 1894.

Remarks.- Peak daily discharges are listed throughout. Several small diversions for 

TrrTgation from upper tributaries have negligible effect on flood flows. Plow 

affected by natural storage in Pend Oreille and Plathead Lakes. Slight regulation 

by Plathead Lake since 1938; usable capacity, 1,219,000 acre-feet. This station 

ia one of the international gaging stations maintained by the United States under 

agreement with Canada.

Year

1894

1904

1905

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

June

June

June

June

June

June

June

May

June

June

June

June

May

July

June

Jan.

June

June

June

June

June

June

May

May

May

June

Dec.

June

June

June

June

May

June

Dec.

May

June

May

June

June

May

May

June

June

June

June

June

June

May

June

Day

8

17

10

15

16

25

15

21

16

16

1

31

9

25

6

24

5

25

14

15

17

28

30

11

23

7

4

19

7

1

28

22

29

14

12

22

8

10

26

31

13

14

28

20

11

8

18

13

Gage 

height

(fix*)

56.40

8.8

7.5

16.7

21.7

34.85

29.15

29.55

16.0

41.2

28.7

19.8

40.02

36.2

16i4

31.55

27.4

28.00

34.0

33.00

29.96

27.30

34.03

19.91

37.65

14.90

37.88

32.27

25.22

25.39

40.86

53.56

26.20

39.45

36.70

37.22

28.21

40.05

33.73

27.14

19.04

31.70

42.0

20.71

34.78

37.44

43.52

60.20

Period 1904-48

( KOHdJMt)

195,000

88,200

50,800

43,800

95,200

124,000

104,000

75,500

77,400

89,000

139,000

70,100

44,000

133,000

122,000

- 38,500

99,100

79,100

82,600

111,000

107,000

91,900

81,000

114,000

50,400

133,000

35,600

137,000

74,500

50,900

51,500

98,000

137,000

53,700

94,400

85,500

87,200

59,900

96,500

76,400

56,600

32,000

70,300

103,000

38,100

79,500

88,000

107,000

ml.71, 100

Annual floods

Older

(M)

1

22

40

43

18

7

13

32

30

21

2

35

42

5

8

15

29

26

10

11

20

27

9

41

6

3

33

39

38

16

4

19

25

24

36

17

31

37

45

34

14

44

28

23

12

1

Recurrence

mcerTO Fill i^nal

56.0

2.09

1.15

1.07

2.56

6.57

3.54

1.44

1.53

2.19

23.0

1.32

1.10

9.20

5.75

3.07

1.59

1.77

4.60

4.18

2.30

1.70

5.11

1.12

7.67

15.3

1.39

1.18

1.21

2.88

11.5

2.42

1.84

1.92

1.28

2.70

1.48

1.24

1.02

1.35

3.38

1.05

1.64

2.00

3.83

46.0

Partial 

duration series

Older

(M)

22

41

44

18

7

13

32

30

21

2

35

43

5

8

45

15

29

26

10

11

20

27

9

42

6

47

3

33

40

39

16

4

38

19

25

24

36

17

31

37

48

34

14

46

28

23

12

1

Recurrence

mcerTO Fill i^nal

2.09

1.12

1.05

2.56

6.57

3.54

1.44

1.53

2.19

23.0

1.32

1.07

9.20

5.75

1.02

3.07

1.59

1.77

4.60

4.18

2.30

1.70

5.11

1.10

7.67

.98

15.3

1.39

1.15

1.18

2.88

11.5

1.21

2.42

1.84

1.92

1.28

2.70

1.48

1.24

.96

1.35

3.38

1.00

1.64

2.00

3.83

46.0

88,880 Mean annual

m Provisional, subject to revision.
MAGNITUDE AND FREQTJENCY OP FLOODS 371 

Fend Oreille River below Z Canyon, near Metaline Palls, Wash.

DISCHARGE. THOUSANDS INOFSECOND-FEET 

8g8S8§iiS SSSSSSSIgg ... 

^

i

*»* /

+ '^

\

 s

\

s" s"^

^

fy

^^» 

/

89

X

4,

/

/

9CD4 48

382 8 N * » o 2 o o 3 g §88 

RECURRENCE INTERVAL. IN YEARS, FOR ANNUAL FLOODS

J

s

s'X

S

f

J

-*

'19O4-48

K

/

S

/

S

o o g o 

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 32.000 SECOND-FEFT
FLOODS OP MAY-JOTS 1948 IN COLOMBIA RIVER BASIN

PEND OREILLE RIVER BASIN

Flathead River near Columbia Falls, Mont.

(Formerly published as North Fork Flathead River near Columbia Falls)

Location.- Lat. 48°29', long. 114°05', at Potter Ranch, three-quarters of a. mile up- 

 stream from Middle Fork and 10 miles northeast of Columbia Falls. Records for

period 1910-17 at site 1,000 feet downstream at different datum. 

Drainage area.- 1,620 square miles. 

Records available.- September 1910 to September 1917, April 1929 to September 1948

(1930, 1931, 1933-36 fragmentary or partly estimated). 

Gage.- Non-recording gage read twice dally prior to May 1, 1930, recording gage thereafter. 

Stage-discharge relation.- Defined by current-meter measurements below 23,400 secondfeet.

Maximum flood of record.- 30,100 second-feet June 20, 1916. 

Remarks.- No diversion or regulation. Gage heights for period when non-recording

gage waa used are from graphs based on gage readings.

Year

1911

1912

1913

1914

1915

1916

1917

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

Month

May

June

May

June

May

June

May

June

June

May

June

May

June

May

June

May

May

May

June

June

Apr.

May

May

May

June

Apr.

May

June

Apr.

May

Day

6

17

14

17

13

12

2

4

25

4

18

27

7

20

16

26

10

17

15

24

3

31

17

14

23

2

15

17

26

24

16

5

28

14

19

2

28

17

30

17

30

Gage 

height 

0W

6.15

5.9

7.20

6.45

5.6

5.4

8.7

5.8

6.6

6.8

5.6

5.6

6.8

9.9

7.9

7.7

9.0

9.0

7.4

10.2

9.0

7.96

8.93

9.93

10.35

9.59

9.24

11.14

9.95

10.34

9.86

7.86

8.74

7.80

8.60

8.50

10.87

8.75

8.91

8.68

7.55

Discharge 

foomd/Mt)

10,500

9,600

15,100

11,700

8,540

7,900

23,200

9,220

12,400

13,300

8,540

8,540

13,300

30,100

18,800

17,600

24,900

24,900

9,900

20,300

15,400

11,800

15,000

19,000

21,200

17,800

16,200

24,400

19,400

20,800

19,000

11,200

13,900

10,800

13,600

13,200

24,000

14,700

13,900

13,200

9,900

Annual floods

Order

(M)

17

24

7

22

25

1

3

11

23

18

9

4

12

10

13

19

5

20

Recurrence

*$nn^

1.65

1.17

4.00

1.27

1.12

28.0

9.33

2.55

1.22

1.56

3.11

7.00

2.33

2.80

2.15

1.47

5.60

1.40

Partial 

duration series

Order

(M)

42

49

21

38

53

57

7

50

37

31

54

55

32

1

12

15

3

4

45

10

17

-

-

11

9

14

16

-

-

-

-

39

27

41

30

34

5

22

28

35

46

R0CULT8H06

*&S!$

0.52

.45

1.05

.58

.42

.39

3.14

.44

.59

.71

.41

.40

.69

22.0

1.83

1.47

7.33

5.50

.49

2.20

1.29

-

-

2.00

2.45

1.57

1.38

-

-

-

-

.56

.81

.54

.73

.65

4.40

1.00

.78

.63

.48
MAGNITUDE AND FREQUENCY OP FLOODS 

Plathead River near Columbia Palls, Mont.

34 

30 

26 

22

18 

14 

10

Ul

z 6 

o

0 

Ul to 

u.

o 

(/) «

Q

»

 * 

r

j

/

J

A

**

 ^^.X

K*- <* . 

_- 

,-^

/

191

^

 

i-nr t _19 2 3- 4!

S in o o CM «n *t <n o in o o o o O <2 Q 3 p S in i r-c eg m 5 K Sine

RECURRENCE INTERVAL, JN YEARS, FOR ANNUAL FLOODS

34 

30 

26 

22

18 

14 

10 

6

4

/"

/^ r

/ D

19

_/ 

K

11-17,

^"

19

r~

29

-^

**~

IS 3

 ^

2, 1937-4

^

8

o o o

RECURRENCE INTERVAL. IN YEARS, FOR FLOODS ABOVE 7.850 SECOND-FEET
FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

FEND OREILLE RIVER BASIN 

Flathead River near Columbia Palls, Mont. Continued

Year

1940

1941

1942

1943

1944

1945

1946

1947

1947

1948

Month

May

May

Apr.

May

June

Apr.

May

June

May

May

June

May

Apr.

May

May

Oct. Apr.

May

Day

12

25

3

23

11

27

7

29

20

28

19

17

6

2

22

7

29

30

10

27

20

30

24

Gage

height 

(fiet)

8.57

8.12

6.71

7.30

7.70

9.57

8.92

7.44

8.74

8.87

8.90

6.82

7.64

9.19

7.12

9.00

10.79

8.62

11.08

8.81

7.58

7.40

11.84

Period 1911-17, 1929-48

Discharge 

(MconA-fttt)

13,900

12,500

8,010

9,800

11,100

18,000

15,300

10,100

14,500

15,300

14,300

7,850

10,200

15,400

8,680

14,700

22,000

13,300

23,500

14,000

9,690

9,120

26,400

Annual floods

Order

(M)

21

26

14

16

27

15

8

6

2

B6CU1T6B08

interval 

(near*)

1.33

1.08

2.00

1.75

1.04

1.87

3.50

4.67

14.0

Partial 

duration series

Order

(M)

29

36

56

47

40

13

19

44

24

20

25

58

43

18

52

23

8

33

6

26

48

51

2

B6CU1T6B08

interval 

front

0.76

.61

.39

.47

.55

1.69

1.16

.50

.92

1.10

.88

.38

.51

1.22

.42

.96

2.75

.67

3.67

.85

.46

.43

11.0

17,810 Mean annual

Plathead River at Columbia Palls, Mont.

Location.- Lat. 48°22', long. 114°11'-, 200 feet downstream from highway bridge at

Columbia Palls and 5 miles downstream from South Pork. 

Drainage area.- 4,440 square miles. 

Records available.- May 1922 to September 1923 (fragmentary), June 1928 to September

1948.

Sage.- Non-recording gage read once daily prior to Nov. 12, 1928, recording gage thereafter. Datum of gage is 2,978.00 feet above mean sea level, datum of 1929 (levels

by Corps of Engineers). 

Stage-discharge relation.- Defined by current-meter measurements below 83,400 secondfeet.

Maximum flood of record.- 102,000 second-feet May 23, 1948. 

Historical data.- Maximum stage known, 22.7 feet in June 1894, from floodmarks (discharge, 150,000 second-feet, from rating curve extended above 83,400 second-feet by

logarithmic plotting). 

Remarks.- No diversion or regulation. Major shift in stage-discharge relation in 1933.

Year

1894

1929

1930

1931

1932

Month

June

May

June

Apr.

May

May

June

May

June

Day

14

24

2

9

15

25

4

21

31

7

16

26

2

14

22

2

15

height 

(feet)

22.7

10.54

14.44

12.00

11.37

9.56

10.40

10.28

9.80

10.80

10.80

13.60

9.97

9.50

15.36

16.46

12.50

12.66

Discharge

(oecond-fcet)

150,000

36,600

69,700

48,200

43,400

30,600

35,900

35,200

31,800

38,800

38,800

62,300

33,200

30,000

79,300

89,800

52,400

54,100

Annual floods

Order

(M)

1

8

18

12

3

Recurrence 

interval

(yean)

56.0

2.62

1.17

1.75

7.00

Partial 

duration series

Order

tu\ \mj

53

10

29

36

67

54

57

63

47

48

14

62

69

6

3

25

22

Recurrence 

interval

(yean)

0.40

2.10

.72

.58

.31

.39

.37

.33

.45

.44

1.50

.34

.30

3.50

7.00

.84

.96
MAGNITUDE AND FREQUENCY OF FLOODS 

Flathead River at Columbia Falls, Mont.

1894, 1929-48

X

S 2

Q ~ ~ ~

8 ~ « * » o jo o o 3 g 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

g g

1929-48

16O 

140 

120 

100 

80 

60 

40 

20 

0

oog

RECURRENCE INTERVAL. IN YEARS, FOR FLOODS ABOVE 26,400 SECOND-FEET
376 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

PEND OREILLE RIVER BASIN 

Plathead River at Columbia Falls, Mont.- Continued

Year

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

Apr. 

June

Apr.

May

June

May

Apr.

May

June

May

June

Apr.

May

June

Apr.

May

May

May

Apr.

May

June

Apr.

May

June

May

May

June

Apr.

May

June

Apr.

May

Apr.

Apr.

May

Day

29

10

16

14 

25

8 

17

28

8

6 

24

20

5

15

1

5

28

3

17

19

2 

27

17

23

30

17

30

4

12

25

14

22

11

27

7

20

28

18

20

31

6

11

1

22

20

27

6

29

6

29

9

27

10

23

30

9

23

height

11.65 

16.70

17.63

10.89 

13.92

13.71 

13.10

12.32

9.70

9.67 

15.28

11.00

12.76

15.40

12.78

10.85 

11.99

11.04

10.68

13.94

11.63 

15.30

10.56

10.32 

14.63

14.09

11.77

9.20

11.67

11.26

9.06

10.39

10.14

13.94

11.83

13.71

13.90

14.89

10.91

9.52

12.10

11.31

13.64

11.04

10.77

11.57

12.54

15.68

13.11

12.68

17.27

12.74

12.13

9.30

10.05

9.44

19.08

Period 1929-48

Discharge

hectmd-ftet)

42,600 

83,500

91,200

37,700 

60,200

58,600 

53,900

47,700

30,200

31,000 

71,000

39,100

51,800

71,800

51,800

37,700 

46,000

39,100

37,100

59,900

42,500 

71,200

35,600

33,700 

65,600

57,700

41,900

26,900

41,300

38,900

26,400

33,500

31,700

56,300

41,900

54,900

56,300

63,600

34,700

27,000

42,200

 37,100

52,700

35,300

34,100

39,000

45,000

69,300

49,200

47,900

83,700

47,900

43,800

27,200

31,700

27,800

102,000

Annual floods

Order

(M)

2

13

7

5

16

6

10

17

20

14

11

19

15

9

4

1

Recurrence 

interval

10.5

1.62

3.00

4.20

1.31

3.50

2.10

1.24

1.05

1.50

1.91

1.11

1.40

2.33

5.25

21.0

Partial 

duration series

Order

(M)

37 

5

2

49

15

17 

23

32

68

66 

9

43

27

7

26

50 

33

44

51

16

38 

8

55

SO 

12

18

40

73

42

46

74

61

64

19

41

21

20

13

58

72

39

52

24

56

59

45

34

11

28

30

4

31

35

71

65

70

1

53,380 Mean annual

Recurrence 

interval 

tgearf

0.57 

4.20

10.5

.43 

1.40

1.24 

.91

.66

.31

.32 

2.33

.49

.78

3.00

.81

.42 

.64

.48

.41

1.31

.55 

2.62

.38

.35 

1.75

1.17

.52

.29

.50

.46

.28

.34

.33

1.10

.51

1.00

1.05

1.62

.36

.29

.54

.40

.89

.38

.35

.47

.62

1.91

.75

.70

5.25

.68

.60

.30

.32

.30

21.0
MAGNITUDE AND FREQUENCY OP FLOODS

FEND OREILLE RIVER BASIN 

Flathead River near Poison, Mont.

Location.- Lat. 47°41', long. 114°15', half a mile downstream from Kerr Dam and 6 miles 

downstream from Poison. Prior to Oct. 1, 1941, at site 6*miles downstream.

Drainage area.- 6,990 square miles; 7,010 square miles at former site.

Recordsavallalile. - July 1907 to September 1948.

Gage.- Mon-recordlng gage read once daily prior to Nov. 24, 1928, recording gage thereafter. Datum of gage prior to Oct. 1, 1941, was 2,629.0 feet above mean sea level 

(from river-profile survey). Datum of gage since Oct. 1, 1941, is 2,693.7 feet above 

mean sea level (Somers datum).

Stage-discharge relation.- Defined by current-meter measurements below 71,200 second- feet. 

Maximum flood of record.- 82,800 second-feet May 29, 1928,

Remarks.- Several small diversions from tributaries above Flathead Lake. Flow somewhat 

affected by natural storage in Flathead Lake prior to completion of Kerr Dam Apr. 12, 

1938, which regulated flow thereafter. Usable capacity of Flathead Lake, 1,219,000 

acre-feet. For frequency study, flood peaks affected by regulation (1940-42, 1945-47) 

are adjusted to their natural values. Both maximum recorded and maximum adjusted 

figures of discharge are listed for each year except 1941, when regulation was so 

pronounced that no adjusted value could be determined.

Year

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1941

1948

Month

June

June

May

June

June

June

May

May

July

June

June

June

June

June

June

June

May

May

May

June

May

June

June

May

May

June

May

June

May

June

June

May

May .

June

May

June

June

June

June

June

May

June

Day

13

22

15

20

15

10

26

18

4

23

20

1

24

11

10

15

26

25

8

19

29

13

11

20

24

19

12

5

19

4

7

20

27

28

4

30

10

24

6

3

5

7

8

15

16

6

Gage 

height 

0W>

14.6

13.75

11.55

11.9

-

16/4

11.4

8.0

16.3

14.1

14.0

12.5

11.9

14.3

13.5

13.43

12.09

15.02

9.22

16.1

17.2

11.70

9.98

10.52

13.60

17.30

13.30

13.03

13.12

10.83

13.07

12.42

11.20

hlO.4

8.56

hl3.1

16.20

15.52

10.57

17.04

h!5. 90

15.67

hlS. 56

16.80

h!6.62

19.15

Period 1908-40, 1942-48

Discharge 

(uxond-feet)

62,100

58,800

42,800

44,200

k 36, 500

75,400

41,000

21,000

74,700

59,100

58,400

48,200

44,200

62,000

56,400

55,700

47,000

67,000

29,200

75,000

82,800

45,500

31,700

35,400

51,800

78,100

52,200

50,200

50,900

35,800

49,200

45,900

g 38, 400

h 33, 300

g22,200

h36,200

g53,500

49,300

24,500

g 58, 400

h51,700

g 50, 500

h49,900

g56,600

h55,400

73,200

Annual floods

Order

(M)

8

11

30

28

32

3

31

40

5

10

12

24

29

9

13

14

25

7

38

4

1

27

37

35

17

2

16

20

19

34

23

26

36

33

22

39

18

21

15

6

Recurrence 

interval

(year.)

5.25

3.82

1.40

1.50

1.31

14.0

1.35

1.05

8.40

4.20

3.50

1.75

1.45

4.67

3.23

3.00

1.68

6.00

1.10

10.5

42.0

1.56

1.14

1.20

2.47

21.0

2.62

2.10

2.21

1.24

1.83

1.62

1.17

1.27

1.91

1.08

2.33

2.00

2.80

7.00.

Partial 

duration series

Order

(M)

Recurrence 

interval

(yean)

51 , 040 Mean annual 1

g Result of regulation; 

h Adjusted for storage. 

k Estimated.

not used in frequency study.
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Plathead River near Poison,'Mont., 1908-48

UJ

LV 90 

O

8 80

UJ

t/>

O 70

60

£ 50

40

< 30

O 20

K"

-3

82

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

Middle Fork Plathead River at Belton, Mont.

Location.- Lat. 48°30'00", long. 113°58'30", at Belton-, half a mile upstream from highway bridge and 2 miles upstream from McDonald Creek.

Drainage area.- 950 square miles.

Records available.- October 1910 to September'1923 (1913-14 fragmentary), February 1929 

to June 1933, August 1943 t'o September 1947. Annual peak only 1947-48.

Gage.- Non-recording gage read once daily.

Stage-discharge feet. relation.- Defined by current-meter measurements below 22,800 s'econdMaximum flood of record.- 49,000 second-feet June 21, 1916.

Remarks.- Wo diversion or regulation.

Year

1911

1912

1913

1914

1915

1916

1917

Month

Apr.

May

June

May

May

May

May

Apr.

May

June

May

June

Day

27

6

17

3

14

16

27

27

17

2

28

7

21

5

10

21

15

26

9

17

Gage 

height 

(ftet)

7.9

9.9

8.8

9.9

9.1

9.5

8.9

14.2

9.2

7.4

8.4

10.9

8.0

9.9

9.9

20.0

12.7

10.45

11.3

11.5

Discharge 

(tecond-feet)

8,430

13,000

10,500

13,000

11,200

12,200

10,700

26,900

11,500

7,250

9,540

16,200

8,600

13,400

13,400

49,000

21,800

14,800

17,400

18,000

Annual floods

Order

(M)

17

18

3

20

23

1

9

Recurrence 

interval 

(V*m>

1.41

1.33

8.00

1.20

1.04

24.0

2.67

Partial 

duration series

Order

(M)

65

31

52

32

43

34

48

-

-

68

57

19

64

28

29

1

8

22

15

13

R6CQTF6Q06

interval 

<»Mnt»

0,34

.71

.42

.69

.51

.65

.46

-

-

.32

.39

1.16

.34

.79

.76

22.0

2.75

1.00

1.47

1.69
MAGNITUDE AND FREQUENCY OF FLOODS 

Middle Fork Flathead River at BeIton, Mont.

1911-23, 1929-33, 1944-48

7

O 5

"> * « 8 8

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

1911-12, 1915-23, 1929-33, 1944-48

t'-'

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 7,250 SECOND-FEET
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

PEND OREILLE RIVER BASIN 

-Middle Fork Flathead River at Belton, Mont. Continued

Year

1918

1919

1920

1921

1922

1923

1929

1930

1931

1932

1933

1944

1945

1946

1947

1948

Period

Month

May

June

May

May

June

May

June

May

June

Apr.

May

June

May

June

Apr.

May

May

May

June

Apr.

May

June

May

May

June

Apr.

May

June

Apr.

May

May

Day

4

16

31

11

2

28

18

9

11

27

8

20

5

29

9

26

11

14

24

1

7

14

25

3

21

30

7

16

25

14

22

15

28

31

16

20

6

11

1

22

20

26

13

18

28

6

29

9

23

Gage 

height 

(ftet)

11.0

8.2

8.4

12.9

8.1

10.0

9.3

8.9

10.1

12.6

10.2

12.0

12.9

7.5

9.4

11.1

10.6

9.1

10.7

10.0

8.5

8.8

8.7

8.6

7.6

8.5

9.1

10.7

8.0

11.5

12.5

8.9

9.05

9.6

12.0

12.7

8.3

9.3

8.8

9.9

8.3

3.3

8.7

9.2

9.3

10.3

8.8

9.70

n!3.00

n!4.3

1911-23, 1929-33, 1944-48

Discharge 

deemirfttD

16,500

9,060

9,540

22,500

8,830

13,600

11,800

10,800

13,900

21,500

14,200

19,600

22,500

7,470

12,000

16,800

15,400

11,900

17,300

14,900

10,000

10,900

10,600

10,300

7,660

10,000

11,900

18,000

8,630

20,200

24,100

11,200

11,600

12,500

20,600

23,400

9,190

12,000

10,700

13,700

9,470

9,610

10,600

11,800

12,100

14,800

10,800

13,100

24,500

30,000

Annual floods

Order

(M)

7

16

19

10

8

13

12

21

11

5

6

22

15

14

4

2

Recurrence 

interval 

(veon)

3.43

1.50

1.26

2.40

3.00

1.85

2.00

1.14

2.18

4.80

4.00

1.09

1.60

1.71

6.00

12.0

Partial 

duration series

Order

(M)

18

61

58

6

62

27

40

46

25

9

24

12

7

67

36

17

20

38

16

21

54

45

50

53

66

55

39

14

63

11

4

44

42

33

10

5

60

37

49

26

59

56

51

41

35

23

47

30

3

2

H6CIHT6U06

interval 

ftwortf

1.22

.36

.38

3.67

.36

.81

.55

.48

.88

2.44

.92

1.83

3.14

.33

.61

1.29

1.10

.58

1.38

1.05

.41

.49

.44

.42

.33

.40

.56

1.57

.35

2.00

5.50

.50

.52

.67

2.20

4.40

.37

.59

.45

.85

.37

.39

.43

.54

.63

.96

.47

.73

7.33

11.0

13,970 Mean annual

n From floodmarks.
MAGNITUDE AND FREQUENCY OF FLOODS 381

FEND OHEILLE RIVER BASIN 

South Fork Flathead River near Columbia Falls, Mont.

Location.- Lat. 48°22', long. 114°03', 2 miles upstream from mouth and 9 miles east of 

Columbia Falls. Prior to Aug. 29, 1928, at site 6,000 feet downstream at different 

datura.

Drainage area.- 1,640 square miles.

Records available.- September 1910 to September 1916 (fragmentary), April 1923 to 

September 1948^(1925-26 fragmentary).

Gage.- Non-recording gage prior to Apr. 13, 1923, recording gage thereafter. Datum of 

gage since Aug. 29, 1928, is 3,031.3 feet above mean sea level, datum of 1929 (Corps 

of Engineers bench mark).

Stage-discharge relation.- Defined by current-meter measurement's below 30,700 secondfeet.

Maximum flood of record.- 46,200 second-feet June 19, 1916.

Remarks.- No diversion or regulation. Flood of June 19, 1916, is known to be greatest 

since September 1910.

Year

1916

1923

1924

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

Month

June

May

May

June

May

June

May

May

June

Apr.

May

May

May

June

Apr.

June

Apr.

May

June

Apr.

May

May

Apr.

May

Apr.

May

May

May

Day

19

11

26

4

17

4

15

1

17

26

9

25

14

24

2

9

15

25

4

31

7

16

26

14

22

2

15

28

5

16

25

6

23

1

20

5

15

31

5

28

19

2

17

27

30

17

30

12

25

14

Gage 

height 

(f«t)

16.6

9.90

11.40

9.92

12.13

7.52

7.94

8.25

12.25

8.95

14.85

14.2

10.72

14,58

11.70

11.30

9.88

10.92

10.23

10.50

11.47

13.98

10.56

15.54

16.53

11.46

12.11

11.47

16.97

1S.22

13.27

9.43

14.84

12.99

11.44

12.98

16.33

13.15

10.06

11.19

12.84

10.74

9.08

13.73

15.2

14.65

11.63

10.84

10.84

9.12

Discharge

<«cW-/«t>

46,200

17,200

21,900

17,500

25,400

11,400

12,700

13,600

27,500

16,300

38,000

34,100

14,400

24,400

16,700

15,800

12,600

14,800

13,300

13,900

16,200

22,700

14,200

27,000

30,000

16,200

17,700

17,000

33,100

36,800

22,000

11,600

26,400

21,100

16,700

21,100

30,900

21,700

13,900

17,000

20,400

14,800

11,200

23,100

27,000

25,100

16,700

14,700

14,700

11,200

Annual floods

Order

(M)

1

18

10

2

5

13

22

16

7

3

17

9

6

20

15

8

23

24

Recurrence 

interval 

<iwr»>

39.0

1.39

2.50

12.5

5.00

1.92

1.14

1.56

3.57

8.33

1.47

2.78

4.17

1.25

1.67

3.12

1.09

1.04

Partial 

duration series

Order

(M)

-

41

26

39

15

74

69

66

11

47

2

5

61

19

44

51

69

54

66

63

48

23

63

12

10

49

38

42

7

3

25

73

14

28

45

29

9

27

65

43

30

56

75

21

13

17

46

58

59

76

R6CUXT6&06

interval 

Cxar.)

-

0.61

.96

.64

1.67

.34

.36

.38

2.27

.53

12.5

5.00

.41

1.32

.57

,49

.36

.46

.38

.40

.52

1.09

.40

2.08

2.50

.51

.66

.60

3.57

8.33

1.00

.34

1.79

.89

.56

.86

2.78

.92

.38

.58

.83

.45

.33

1.19

1.92

1.47

.54

.43

.42

.33

824933 O - 49 - 27
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

South Fork Flathead River near Columbia Falls, Mont.

THOUSANDS DISCHARGE, IN SECOND-FEET OF

ogggg oS8o£g = 

*

/

^

^

*+ ^

r

/

-

*'» -.-^

191

J

6, 1£

^

23-2^

X

-

1,

-

1 327 -48

382 g < > * « 2 S 8 8 § g § § 1 

RECURRENCE INTERVAL.-IN YEARS, FOR ANNUAL FLOODS

*

/

**

< >«

.

b

^x. r

(«'

T4

X

* - r^

*--

1

^*-

J23-24, 1927-

/

- ^

X

48

OOOO

CM ro ^ lO

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 11.200 SECOND-FEET
MAGNITUDE AMD FREQUENCY OF FLOODS

PEND OREILLE RIVER BASIN 

South Fork Flathead River near Columbia Falls, Mont.--Continued

Year

1942

1943

1944

1945

1946

1947

1948

Month

Apr.

May

June

Apr.

May

June

July

May

May

June

Apr.

May

June

Apr.

May

May

June

Apr.

May

June

Day

22

11

27

8

20

28

19

1

16

6

11

1

22

20

27

6

18

29

6

29

9

27

10

30

8

22

28

4

Gage 

height 

(feet)

9.91

9.02

13.38

10.98

13.31

13.74

14.68

12.43

10.73

11.84

10.57

12.53

10.53

10.30

10.79

11.96

10.89

14.58

11.89

11.66

17.70

12.12

11.77

9.58

9.52

19.60

17.22

16.65

Period 1923-24-, 1927-48

Discharge

(xxvnd-feet)

13,000

11,200

23,300

16,100

23,000

22,700

25,400

19,300

15,100

17,800

14,800

19,500

14,600

14,400

15,300

18,300

15,600

25,100

18,300

17,500

35,500

18,500

17,800

12,000

11,800

43,400

34,100

32,100

Annual floods

Order

(M)

14

11

21

19

12

4

1

Recurrence 

interval

1.79

2.27

1.19

1.32

2.08

6.25

25.0

Partial 

duration series

Order

(M)

68

77

20

50

22

24

16

32

54

36

57

31

60

62

53

34

52

18

35

40

4

33

37

71

72

1

6

8

Recurrence 

interval 

(year*)

0.37

.32

1.25

.50

1.14

1.04

1.56

.78

.46

.69

.44

.81

.42

.40

.47

.74

.48

1.39

.71

.62

6.25

.76

.68

.35

.35

25.0

4.17

3.12

25,320 Mean annual

Location.- Lat. 48°19 

from mouth.

Whitefish Creek near Kalispell, Mont, 

long. 114°16' 8 miles north of Kalispell and 8 miles upstream

Records available.- November to December 1906 (gage heights only), July 1928 to September 1948.»

Gage.- Non-recording gage read once daily prior to Oct. 16, 1930, recording gage thereafter. Datum of recording gage is 2,969.7 feet above mean sea level, datum of 1929 

(Corps of Engineers bench mark).

Stage-discharge relation.- Defined by current-meter measurements.

Maximum flood of record.- 1,290 second-feet May 30, 1948.

Remarks.- Some regulation by Whitefish Lake. No diversion.

Year

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

June

June

May

May

June

June

May

June

May

June

May

May

May

May

June

Apr*

June

May

June

June

May

June

May

Day

4

8

19

24

3

18

1

16

17

8

31

20

26

6

6

22

23

20

6

1

12

11

30

Gage 

height 

(feet)

12.52

12.85

2.81

3.84

4.26

4.01

3.55

3.36

3.25

2,84

3.18

3.22

2.73

2.60

2.98

2.76

3.18

2.43

3.25

3.94

4.17

4.14

4.41

Period 1929-48

Discharge 

(xxvnd-feet)

684

827

648

1,070

1,270

1,140

982

905

856

661

782

757

552

488

682

568

709

406

710

1,110

1,170

1,160

1,290

Annual floods

Order

(M)

14

9

17

2

4

6

7

8

16

10

11

18

19

15

13

20

12

5

3

1

Recurrence 

interval

(yean)

1.50

2.33

1.24

10.5

5.25

3.50

3.00

2.62

1.31

2.10

1.91

1.17

1.10

1.40

1.62

1.05

1.75

4.20

7.00

21.0

Partial 

duration series

Order

(M)

16

11

19

7

2

5

8

9

10

18

12

13

21

22

17

20

15

23

14

6

3

4

1

Recurrence 

interval

( yean)

1.31

1.91

1.10

3.00

10.5

4.20

2.62

2.33

2.10

1.17

1.75

1.62

1.00

.95

1.24

1.05

1.40

.91

1.50

3.50

7.00

5.25

21.0

831 Mean annual
FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN 

Whitefish Creek near Kalispell, Mont., 1929-48

13 

12 

11 

10 

9 

8 

7

6

ul

e 5

Q

§4

Ul 

(A

U.

° \

2 -

Ul

ce.

Q

z 

r>

X

z

Ul 

C5

cc 

513

(A 

Q 

12

11

10 

9 

8 

7 

6 

5 

4

/

/

r

s" y

f

|

H>

/

/

/

f^^

^

/

/

,~-~~~

?8S 8" « * » 228S§8 §S| 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

i

--

]

i

/

ri

i 

9

7/

^

s

»- ,*-

/ s

, 

CM to ^ m o 

_; 

CM to * in "-" O CM OQQO

m 5f OS

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 406 SECOND-FEET
MAGNITUDE AND FREQUENCY OF FLOODS 385

PEND 03EILLE RIVER BASIN 

Swan River near Big Fork, Mont.

Location.- Lat. 48°01', long. 113"59', at outlet of Swan Lake, 7 miles southeast of Big 

Fork. At site 800 feet upstream Apr. 28, 1922, to Oct. 14, 1930. Prior to Apr. 28, 

1922, at site 2 miles upstream from Swan Lake.

Drainage area.- 647 square miles.

Records available.- October 1910 to May 1911 (gage heights only), April 1922 to September 1948.

Gage.- Non-recording gage read twice daily prior to Oct. 15, 1930, recording gage thereafter at different datum.

Stage-discharge relation.- Defined by current-meter measurements below 6,500 secondreet.

Maximum flood of record.- 8,400 second-feet May 24, 1948.

Remarks.- No diversion. Natural storage in Swan Lake.

Year

1922

1923

1924

1925

1926

1926

1927

1928

1929

1930

1931

1932.

1933

1933

1934

1935

1936

1937

1938

Month

May

June

May

June

May

Apr.

May

June

Apr.

May

Dec.

Apr.

May

June

Apr.

May

June

May

June

Apr.

June

May

June

Apr.

May

June

Apr.

June

Oct.

Dec.

Apr.

June

May

Apr.

May

June

May

June

Apr.

May

Day

22

8

12

28

14

19

14

23

23

21

2

24

5

30

19

13

30

28

30

26

12

29

1

18

3

19

16

24

18

30

18

24

25

30

1

25

25

17

2

29

23

21

3

30

Gage 

height 

(f*t>

4.25

4.82

3.35

3.93

4.35

4.68

4.24

5.. 45

3.88

3.80

3.74

3.24

2.58

4.10

4.34

5.56

3.70

5.90

4.00

4.4

3.80

2.76

2.88

5.57

4.63

4.41

5.49

5.92

5.32

4.51

7.00

3.97

5.42

4.99

4.80

5. S3

5.41

5.97

5.66

4.71

4.56

4.39

4.26

5.26

Discharge 

(toeond-fttt)

4,530

5,440

3,220

4,020

4,870

5,380

4,530

6,660

4,020

3,860

3,700

2,920

2,120

4,360

4,700

7,060

4,140

7,820

4,640

5,300

4,310

2,780

2,920

5,14C

3,400

2,970

4,950

5,710

4,570

3,050

8,280

2,200

4,750

3,950

3,560

4,650

4,850

6,180

5,550

3,380

3,130

2,640

2,560

4,350

Annual floods

Order

(M)

10

14

11

5

22

4

3

12

26

13

8

2

15

16

6

24

18

RocuTTvnoo 

interval 

(vxm>

2.80

2.00

2.55

5.60

1.27

7.00

9.33

2.33

1.08

2.16

3.50

14.0

1.87

1.75

4.67

1.17

1.56

Partial 

duration series

Order

(M)

24

11

47

34

16

12

25

5

35

39

40

54

64

27

19

4

33

3

21

13

30

56

55

14

45

52

15

8

23

51

2

63

18

37

44

20

17

6

10

46

49

57

59

28

Recurrence 

interval 

(ymrt)

1.17

2.55

.60

.82

1.75

2.34

1.12

5.60

.80

.72

.70

.52

.44

1.04

1.47

7.00

.85

9.33

1.33

2.15

.93

.50

.51

2.00

.62

.54

1.87

3.50

1.22

.55

14.0

.44

1.56

.76

.64

1.40

1.65

4.67

2.80

.61

.57

.49

.47

1.00
Q -H rt ^

FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Swan River near Big Pork, Mont., 1922-48

UJ 

UJ«V 2

Q

Z

o 0 1

UJ *

en

LL. 

0 0

en c

,

\ =

/

3 S

^

>

X*

/

g ft

^

i

 -» 

<n

^

^t

X

If

/

>

^

p

^^

0 u2 $

 . 

5 5; i? 5 s s' §

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

i

f

f

/'r^r~~~X

x

/

/

^- _ - 

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 2,1 20 SECOND-FEET
MAGNITUDE AND FREQUENCY OP FLOODS 387

PEND OREILLE RIVER BASIN 

Swan River near Big Fork, Mont Continued

Year

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

May

 ffune

May

June

Apr.

May

June

July

Apr.

May

June

May

June

May

June

May

May

June

May

Day

6

21

27

3

24

28

10

2

21

30

21

20

3

17

4

24

9

30

11

12

24

Gage 

height 

(/«*>

5.24

4.35

4.82

3.88

4.01

5.06

4.91

4.20

5.17

5.16

5.82

4.53

4.18

4.46

5.01

4.83

4.62

5.34

6.11

5.32

7.12

Period 1922-48

Discharge 

(oeeond-foet)

4,350

2,640

3,650

2,120

2,220

3,980

3,690

2,520

4,220

4,220

5,570

3,120

2,550

2,960

3,940

3,660

3,210

4,610

5,960

4,380

8,400

Annual floods

Order

(M)

19

23

27

20

9

25

21

17

7

1

Recurrence 

interval

(yean)

1.47

1.22

1.04

1.40

3.11

1.12

1.33

1.65

4.00

28.0

Partial 

duration series

Order

(M)

29

58

43

65

62

36

41

61

31

32

9

50

60

53

38

42

48

22

7

26

1

Recurrence 

interval

(yean)

0.97

.48

.65

.43

.45

.78

.68

.46

.90

.88

3.11

.56

.47

.53

.74

.67

.58

1.27

4.00

1.08

28.0

5 , 091 Mean annual

Prieat River at outlet of Prieat Lake, near Coolin, Idaho

Location.- L4t. 48°29 I , long. 116 0 54', at aouthweat end of Priest Lake, 2 miles northweat of Coolin. Prior to Nov. 25, 1914, at aite on lake Just upstream from outlet.

Drainage area.- 572 square miles.

Records available.- June 1911 to September 1918 (fragmentary), May 1919 to September 

1948.

Page.- Non-recording gage read once dally prior to Nov. 25, 1914, recording gage 

thereafter. Datum of recording gage is 2,435.06 feet (Coaat and Geodetic Survey 

datum) or 2,437.99' feet (Geological Survey datum) above mean aea level.

Stage-dlacharge relation.- Defined by current-meber meaaurementa.

Maximum flood~of record.- 8,560 second-feet May 29, 1948.

Remarks.- No dlversion above station. Some regulation due to dumping logs Into outlet 

of Priest Lake. Major change In atage-diacharge relation after 1928 water year.

Year

1913

1914

1915

1916

1917

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

.1930

1931

1932

1933

Month

June

May

May

June

May

May

May

Apr.

May

June

May

May

May

May

June

May

May

Apr.

May

May

June

Day

5

23

2

20

30

29

21

25

27

7

27

20

23

4

14

28

26

28

17

23

17

Gage 

height 

(f»*)

7.42

6.7

3.49

5.85

6.83

5.86

4.02

4.23

6.28

5.32

4.48

4.64

5.55

4.07

5.38

5.18

3.95

3.85

3.98

5.29

4.89

Discharge

( xxmdjett)

5,970

5,030

2,450

5,640

7,290

5,800

3,170

3,480

6,440

5,120

4,080

4,220

5,730

3,080

5,410

5,250

3,800

3,710

4,310

6,890

5,940

Annual floods

Order

(M)

7

19

34

13

2

10

32

4

18

25

22

12

33

15

16

28

30

21

3

8

R6CUIT6UC6

interval

(yean)

5.14

1.89

1.06

2.77

18.0

3.60

1.13

9.00

2.00

1.44

1.64

3.00

1.09

2.40

2.25

1.29

1.20

1.71

12.0

4.50

Partial 

duration series

Order

(M)

7

19

36

13

2

10

34

32

4

18

26

22

12

35

15

16

29

31

21

3

8

Recurrence 

interval

(yean)

5.14

1.89

1.00

2.77

18.0

3.60

1.06

1.13

9.00

2.00

1.38

1.64

3.00

1.03

2.40

2'.25

1.24

1.16

1.71

12.0

4.50
388 FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

Priest River at outlet of Priest Lake, near Coolin, Idaho, 1913-17, 1919-48

SECOND-FEET THOUSANDS INOF DISCHARGE. 

MU>-I*<J!<D-J<»1O MOJ.(*<Jla>-JOO«>

 7

J

t**,J

1

-4

^

|

*~ . - -

X- 1- ^

'x

X

X

X

3. 8 2 8 " « * » 228838 I 8 g 

RECURRENCE INTERVAL. IN YEARS. FOR ANNUAL FLOODS

V

x

-**" /

V--1

^'

X'

s

/

x

s

POQO

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS AB9VE 2.430 SECOND-FEET
MAGNITUDE AND FREQUENCY OP FLOODS 389

FEND OREILLE RIVER BASIN 

Priest River at outlet of Priest Lake, near Coolln, Idaho Continued

Year

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

Apr.

June

May

May

May

May

May

May

May

Apr.

June

May

May

May

May

May

Day

30

1

16

29

30

5

15

20

29

23

1

17

17

29

11

29

Gage 

height

4.84

4.35

4.13

3.21

4.78

3.62

3.46

3.53

3.63

3.77

3.48,

2.35

4.27

4.64

4.20

5.53

Period 1913-17, 1919-48

Discharge

5,870

5,130

4,540

3,220

5,780

4,010

3,760

3,920

4,100

4,100

4,180

2,430

5,620

6,390

6,100

8,560

Annual floods

Order

(M)

9

17

20

31

11

26

29

27

24

23

35

14

5

6

1

K6CUIT8IIC6

intern! f ,1- ,t lyMrv

4.00

2.12

1.80

1.16

3.27

1.38

1.24

1.33

1.50

1.57

1.03

2.57

7.20

6.00

36.0

Partial 

duration series

Order

(M)

9

17

20

33

11

27

30

28

24

25

23

37

14

5

6 

1

R6CUCT8DC6

intern!

<V»an)

4.00

2.12

1.80

1.09

3.27

1.33

1.20

1.29

1.50

1.44

1.57

.97

2.57

7.20

6.00

36.0

4»9*1 Mean annual

KETTLE RIVER BASIN

Kettle River near Ferry, Wash, 

(international gaging station)

Location.- Lat. 48e 58'40", long. 118<> 46 I 10", l£ miles south of international boundary

and Ferry and 3 miles upstream from Toroda Creek. 

Drainage area.- 2,220 square miles. 

Records available.- August 1928 to September 1948. 

Gage.- Recording. Datum of gage is 1,840.00 feet above mean sea level (subject to

correction for datum of 1929). 

Stage-discharge relation.- Defined by current-meter measurements below 16,700 secondfeet.

Maximum flood of record.- 21,400 second-feet May 29, 1948. 

Remarks.- Several small diversions above station for irrigation. This station is

one of the International gaging stations maintained by the United States under

agreement with Canada.

Year

1929

1930

1931

1932

1933

1934

1935

Month

May

June

June

May

May

June

Apr

May

June

July

Apr.

May

May

June

July

Day

24

2

1

7

15

10

22

3

15

29

14

27

5

17

26

2

14

28

16

26

31

6

23

31

6

2

Gage 

height 

(f«t)

15.15

14.73

14.46

15.18

15.90

16.87

17.01

16.32

16.14

16.11

15.92

17.19

17.10

18.40

15.50

15.60

14.89

17.43

15.17

14.72

14.69

14.81

17.23

16.64

16.16

16.14

Discharge ( oamdjett)

7,420

6,400

6,000

7,420

9,020

10,100

10,300

8,970

8,590

8,700

8,310

11,100

10,800

14,000

7,550

7,740

6,410

11,500

6,980

6,030

6,030

6,220

11,100

9,730

8,900

8,700

Annual floods

Older

(M)

19

20

16

11

3

7

8

jMCumncA 

interval 

<V*m)

1.10

1.05

1.31

1.91

7.00

3.00

2.62

Partial 

duration series

Order

(M)

47

62

68

48

28

18

17

30

37

34

40

11

14

4

45

43

61

10

54

64

65

63

12

24

31

35

Recurrence interval 

Awn)

0.45

.34

.31

.44

.75

1.17

1.24

.70

.57

.62

.52

1.91

1.50

5.25

.47

.49

.34

2.10

.39

.33

.32

.33

1.75

.87

.68

.60
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Kettle River near Ferry, Wash., 1929-48

20

Q -; _;

8 2 3 " « * « o « o o 3 g 

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

.,*-"

oo

^ tf>

RECURRENCE INTERVAL. IN YEARS. FOR FLOODS ABOVE 6,000 SECOND-FEET
MAGNITUDE AND FREQUENCY OP FLOODS 391

KETTLE RIVER BASIN 

Kettle River near Ferry, Wash. Continued

Year

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

Apr.

May

June

May

June

May

May

May

June

May

Apr.

May

June

May

June

May

June

May

June

Apr.

May

June

May

May

June

Day

26

5

15

29

3

27

3

19

23

1

13

26

4

17

29

11

26

1

2

13

17

22

14

27

7

16

27

10

18

16

2

6

15

1

5

27

10

29

15

8

29

11

Gage 

height

17.22

16.74

16.54

15.19

16.25

16.06

16.66

14.70

14.73

16.24

15.28

17.6.6

16.03

16.86

15.38

16.43

16.83

15.79

16.38

15.12

15.00

15.31

15.68

20.54

16.78

15.50

15.92

15.41

15.26

15.53

15.96

17.21

16.78

18.25

18.10

16.30

18.01

18.66

15.62

16.39

21.15

18.76

Period 1929-48

Discharge 

( xxmdjeet)

11,100

9,940

9,520

6,980

8,900

8,700

9,940

6,030

6,030

8,900

7,170

12,200

8,500

10,400

7,360

8,990

9,930

7,680

9,310

6,630

6,440

6,790

7,550

18,200

9,790

7,170

7,950

6,980

6,790

7,310

8,280

10,800

9,920

12,500

12,200

8,400

12,000

13,600

7,170

9,070

m21,400

m!4,800

Annual floods

Order

(M)

9

12

6

10

13

14

2

18

17

5

4

15

1

Recurrence 

interval

2.33

1.75

3.50

2.10

1.62

1.50

10.5

1.17

1.24

4.20

5.25

1.40

21.0

Partial 

duration aeries

Order

(M)

13

19

25

55

32

36

20

66

67

33

51

7

38

16

49

29

21

44

26

59

60

57

46

2

23

52

42

56

58

50

41

15

22

6

8

39

9

5

53

27

1

3

interval

<*«*>

1.62

1.10

.84

.38

.66

.58

1.05

.32

.31

.64

.41

3.00

.55

1.31

.43

.72

1.00

.48

.81

.36

.35

.37

.46

10.5

.91

.40

.50

.37

.36

.42

.51

1.40

.95

3.50

2.62

.54

2.33

4.20

.40

.78

21.0

7.00

11,160 Mean annual

m Provisional, subject to revision.
392 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

KETTLE RIVER BASIN

Kettle River near Laurier, Wash. 

(International gaging station)

Location.- Lat. 48°50 I 50", long. 118 0 13'00", 500 feet downstream from Deep Creek, l£ 

miles southeast of Laurier, and 12 miles upstream from Boulder Creek.

Drainage area.- 3,800 square miles.

Records available.- September 1929 to September 1948.

Gage.- Recording.

Stage-discharge relation.- Defined by current-meter measurements below 28,000 secondfeet, and by slope-area measurement of peak discharge.

Maximum flood of record.- 34,800 second-feet May 29, 1948 (gage height, 17.25 feet).

Historical data.- Maximum stage known, about 22 feet sometime in May or June 1894, 

from information by local residents.

Remarks.- Plow regulated by storage on North Fork at Grand Forks, British Columbia. 

Numerous small diversions for irrigation and domestic supply. This station is 

one of the international gaging stations maintained by the United States under 

agreement with Canada.

Year

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

Month

June

May

June

Apr.

May

June

Apr.

May

June

July

Apr.

May

May

June

July

Apr.

May

June

May

June

May

May

Apr.

May

June

Apr.

May

June

Day

1

8

15

Z

15

11

22

4

16

29

15

27

6

17

3

14

26

17

27

7

24

1

7

3

26

6

16

3

18

5

28

4

24

2

27

5

17

30

28

12

26

2

13

3

18

1

9

21

Gage 

height 

<f*t)

8.64

10.71

11.58

8.59

10.48

13.20

13.00

11.31

11.28

12.10

11.8

13.15

12.94

14.48

10.24

10.73

13.60

10.54

9.79

10.53

13.03

11.92

11.26

10.20

12.93

11.92

11.53

10.66

8.68

9.70

11.13

11.66

10.00

12.26

13.82

11.60

12.05

9.90

9.69

12.06

12.33

10.53

9.23

11.80

10.61

9.33

8.93

8.67

Discharge 

(»eoml-fttt>

 7,820

12,500

14,800

7,820

12,000

19,200

18,600

14,000

14,000

16,600

. 15,700

19,900

19,000

23,800

11,200

12,600

21,100

12,000

10,300

12,000

19,300

16,000

14,200

11,300

19,000

16,000

14,800

12,600

8,000

10,100

13,700

15,400

10,900

17,200

21,700

15,200

16,300

10,700

10,200

16,600

17,200

12,200

8,980

15,700

12,500

9,210

8,290

7,850

Annual foods

Onier

(M)

19

16

9

3

7

8

10

15

5

12

11

14

R0CUITC&G0

intern) 

fram)

1.05

1.25

2.22

6.67

2.86

2.50

2.00

1.33

4.00

1.67

1.82

1.43

Partial 

duration series

Order

(M)

72

43

31

73

47

13

16

34

35

20

27

10

14

4

53

41

9

48

61

49

12

24

33

52

15

25

32

42

70

63

37

29

56

17

6

30

22

59

62

21

18

46

67

28

44

65

68

71

Recurrence 

intern) 

CyMrt)

0.28

.46

.64

.27

.43

1.54

1.25

.59

.57

1.00

.74

2.00

1.43

5.00

.38

.49

2.22

.42

.33

.41

1.67

.83

.61

.38

1.33

.80

.62

.48

.29

.32

.54

.69

.36

1.18

3.33

.67

.91

.34

.32

.95

1.11

.43

.30

.71

.45

.31

.29

.28
0.2

O 2

5 3 

O

S 4

H- " M

ro 01 o

DISCHARGE, IN THOUSANDS OF SECON

no o-^o

o

c 

 a

70 o

m 

5 3

m 

TO 4

< 

> K

^ m

-n 

O

70 15

>

i 2°

c 

>

-n 

5 40

0 50

U)

150

900
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

KETTLE RIVER BASIN 

Kettle River near Laurier, Wash. Continued

Year

1943

1943

1944

1945

1946

1947

1948

Month

Apr.

May

June

Apr.

May

June

May

June

May

June

Apr.

May

June

Apr.

May

Apr.

May

Day

22

15

28

8

20

28

11

18

10

17

3

15

6

1

_

27

10

29

16

30

9

 28

23

22

29

Gage 

height 

(ftet)

10.67

10.75

15.73

12.30

10.05

11.09

10.23

10.10

9.17

10.46

10.72

8.78

13.24

13.82

10.0

12.01

13.99

13.66

10.45

9.94

11.93

9.26

9.81

15.77

17.25

Period 19 30 -48

Discharge 

(nomd/nt)

12,700

13,000

27,400

17,200

10,900

13,800

11,400

11,200

9,150

12,300

12,800

8,230

19,900

21,700

11,000

16,300

. 22,000

21,400

12,000

10,800

16,000

9,400

m 10, 600

m 29, 200

m 34, 800

Annual floods

Order

(M)

2

17

18

6

4

13

1

Recurrence 

interval 

frnmi)

10.0

1.18

1.11

3.33

5.00

1.54

?0.0

Partial 

duration series

Order

(M)

40

38

3

19

57

36

51

54

66

45

39

69

11

7

55

23

5

S

50

58

26

64

60

2

Beemrenee 

interval 

<VMm>

0.50

.53

6.67

1.05

.35

.56

.39

.37

.30

.44

.51

.29

1.82

2.86

.36

.87

4.00

2.50

.40

.35

.77

.31

.33

10.0

20.0

18 , 900 Mean annual

m Provisional, subject to revision.

COLVILLE RIVER BASIN

Colville River at Kettle Falls, Wash. 

(Formerly published as Colville River at Meyers Falls)

Location.- Lat. 48°36', long. 1180 04', 500 feet downstream from Stevens County Light

& Pover Co.'s plant at foot of Meyers Falls,' half a mile south of town of Kettle

Falls and 5 miles upstream from mouth. Prior to Oct. 21, 1932, at site 500 feet

upstream, at different datum.

Records available.- October 1922 to September 1948. 

Gage.- Hon-recording gage read twice daily. Gag"e destroyed Apr. 20, 1938j re-established May 14, 1938, at site 200 feet downstream at datum 5 feet lower. 

Stage-discharge relation.- Defined by current-meter measurements below 2,280 secondfeet.

Maximum flood of record.- 2,720 second-feet Apr. 20, 1938. 

Remarks.- Several ditches divert water above station for irrigation. Slight regulatlon for power by small reservoir above falls. Gage heights are from graphs based

on gage readings.

Year

1922

1923

1924

1925

Month

Dec.

Jan.

Apr.

June

July

Feb.

Mar.

Apr.

Feb.

Mar.

Apr.

June

Day

28

13

20

14

10

8

3

14

10

4

19

12

Gage 

height 

<f«t)

2.32

2.50

3.92

2.69

2.43

2.73

2.40

2.30

3.71

3.42

4.65

2.44

Discharge

(Hcondf**)

K240

338

916

404

322

422

307

277

k772

683

1,270

310

Annual floods

Order

(M)

15

22

9

Reeorrenoe 

interval

toon..)

1.80

1.23

3.00

Partial 

duration series

Order

(M)

81

56

18

49

62

44

68

74

21

27

10

67

Recurrence 

interval

<iw>n»

0.33

.48

1.50

.55

.44

.61

.40

.36

1.28

1.00

2.70

.40
30

MAGNITUDE AND FREQUENCY OP FLOODS 

Colville River at Kettle Falls, Wash., 1923-48

395

20

7

8 "" -* CM to ° 8 §2 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

z

UJ

o:

<

Xc/l

Q

- O1 f

-*4**

u

/ 

 )

^

/

-'

L./

0 0J ff

/

) r

X

t ir

r

>

/

/

^x

0 C

V

3 C> CJ 8

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 220 SECOND-FEET
FLOODS OF MAY-JOTIE 1948 IN COLTJMBIA RIVER BASHf

COLVILLE RIVER BASIN 

Colville River at Kettle Palls, Wash. Continued

Tear

1926

1926

1927

1927

1928

1929

1930

1931

1932

1933

1933

1934

1935

1936

1937

1937

1938

1939

1939

1940

1940

1941

1941

1942

1942

1943

1944

Month

Feb.

Apr.

Dec.

Jan.

May

June

Sept.

Oct.

Dec.

Jan.

Feb.

Apr.

May

July

Mar.

Apr.

Feb.

Mar.

Apr.

Mar.

Apr.

Apr.

Dec.

Jan.

Apr.

Jan.

Feb.

Apr.

- July

Mar.

Apr.

June

Mar.

Apr.

June

Nov.

Dec.

Jan.

Mar.

Apr.

Jan.

Mar.

Dec.

Feb.

Mar.

Apr.

Dec.

Jan.

Mar.

May

Sept.

Nov.

Dec.

Feb.

Apr.

May

Nov.

Dec.

Apr.

June

Feb.

Mar.

Apr.

May

Day

12

19

3

5

1

12

15

7

5

13

7

3

1

5

14

23

25

23

9

5

27

30

25

28

3

8

5

28

3

7

27

10

19

22

24

28

20

1

23

22

20

4

28

18

13

8

4

29

31

10

19

21

18

6

26

11

16

29

25

18

16

22

9

10

18

26

Gage 

height 

(/««>

2.38

2.39

2.70

2.30

4.95

3.74

2.85

2.58

3.45

2.90

2.98

4.55

4.55

2.43

2.55

2.50

2.13

2.14

2.16

2.84

5.55

4.44

2.89

3.15

3.65

1.75

2.29

4.08

1.79

2.15

2.97

1.80

2.03

2.88

2.17

2.09

1.90

2.44

2.75

5.57

6.10

6.08

6.82

5.86

5.80

6.78

8.26

5.95

6.20

7.30

6.60

5.73

6.03

6.25

7.02

6.68

7.40

7.88

5.90

6.00

7.40

6.00

5.78

6.39

6.20

5.90

Discharge 

(moatirft*}

285

285

357

246

1,280

730

417

356

625

450

485

1,260

1,260

324

356

340

k220

237

237

461

1,760

1,540

k600

820

1,040

220

430

1,380

239

348

753

237

314

703

331

312

244

458

605

2,300

2,720

332

620

237

220

620

1,450

304

389

880

547

244

337

408

730

608

973

1,270

280

314

973

314

248

470

408

264

Annual floods

(Mar

(M)

24

8

11

23

26

25

3

5

13

7

17

18

1

20

6

16

10

14

21

R0CUET6O06

interval 

(*«**>

1.12

3.38

2.46

1.18

1.04

1.08

9,00

5.40

2.08

3.86

1.59

1.50

27.0

1.35

4.50

1.69

2.70

1.93

1.28

Partial 

duration series

(Mar

(M)

72

71

51

78

9

24

45

52

29

41

37

12

13

61

53

55

91

87

86

39

4

6

34

20

15

92

43

8

83

54

23

88

63

26

60

66

79

40

33

2

1

59

30

89

93

31

7

69

50

19

35

80

57

46

25

32

16

11

73

65

17

64

77

38

47

75

Rocumnoo 

interval 

fr~m>

0.38

.37

.53

.35

3.00

1.12

.60

.52

.93

.66

.73

2.25

2.08

.44

.51

.49

.30

.31

,31

.69

6.75

4.50

.79

1.35

1.80

.29

.63

3.38

.32

.50

1.1?

.31

.43

1.04

.45

.41

.34

.68

.82

13.5

27.0

.46

.90

.30

.29

.87

3.86

.39

.54

1.42

.77

.34

.47

.59

1.08

.84

1.69

2.46

.37

.42

1.59

.42

.35

.71

.57

.36
MAGNITUDE AND FREQUENCY OP FLOODS

COLVILLE RIVER BASIN 

Colville River at Kettle Falls, Wash. Continued

» 

Year

1945

1946

1946

1947

1947

1948

Month

Feb.

Mar.

May

Jan.

Apr.

June

Dec.

Jan.

Feb.

Apr.

June

Oct.

Jan.

Feb.

May

Day

9

28

6

7, 8

22

29

8

25

14

21

10

23

9

22

15

Gage 

height 

</ *)

6.46

6.95

7.65

5.95

8.72

6.00

5.72

5.75

6.20

6.80

5.75

5.68

5.66

6.30

9.45

Period 1923-48

Discharge 

( econdjeet)

492

758

1,060

297

1,710

334

238

k240

408

668

253

238

m224

m448

m2,200

Annual floods

Order

(M)

12

4

19

2

RtMMUTBDCO

interval

(Vtan)

2.25

6.75

1.42

13.5

Partial . 

duration series

Order

(M)

36

22

14

70

5

58

84

82

48

28

76

85

90

42

3

Recurrence 

interval

<V»an)

0.75

1.23

1.93

.39

5.40

.47

.32

.33

.56

.96

.36

.32

.30

.64

9.00

1,060 Mean annual

k Estimated 

m Provisional, subject to revision.

SPOKANE RIVER BASIN 

Coeur d'Alene River near Cataldo, Idaho

Location.- Lat. 47°34', long. 116°18', l£ miles upstream from Cataldo and 3 miles

downstream from South Pork. 

Drainage area.- 1,220 square miles.

Records available.- April 1911 to December 1912, July 1920 to September 1948. 

Gage.- Non-recording gage read once daily prior to Oct. 11, 1925, recording gage

thereafter. Datum of gage since July 1920 is 2,100 feet above mean sea level

(Geological Survey datum). 

Stage-discharge feet. relation.- Defined by current-meter measurements below 22,700 secondMaximum flood of record.- 55,300 second-feet Dec. 22 or 23, 1933. 

Remarks.- Ro appreciable diversion or regulation above station. Gage heights for

period when non-recording gage was used are fAsm graphs based on gage readings.

Stage-discharge relation frequently affected by log Jams and occasionally by

backwater from Coeur d'Alene Lake.

Year

1912

1920

1921

1921

1922

1923

1924

Month

Apr.

May

Dec.

Feb.

Mar.

Apr.

May

Dec.

Apr.

May

June

Jan.

Apr.

May

June

Feb.

Apr.

May

Day

5

11

10

30

13

18

25

3

14

23

8

15

12

8

23

5

18

2

8

2

18

28

8

2

13

13

4

12

Gage 

height

9.45

10.80

10.10

47.00

48.00

50.00

43.87

44.00

45.50

47.20

47.26

46.00

48.40

44.88

44.72

46.69

48.30

43.12

45.50

45.42

47.52

45.56

46.60

43.80

46.00

43.86

47.47

45.00

Discharge

( econd-fett)

11,300

14,900

13,000

16,100

19,000

25,000

7,790

8,070

11,800

16,700

15,800

11,800

20,200

10,200

9,770

15,100

18,500

6,240

11,800

11,600

17,600

12,000

14,900

7,720

13,200

7,910

16,600

10,000

Annual floods

Order

(M)

19

6

12

16

18

Recurrence 

interval

1.58

5.00

2.50

1.88

1.67

Partial 

duration series

Order

(M)

78

41

56

34

20

6

136

129

70

30

35

69

17

91

99

39

22

152

71

73

25

65

42

137

52

131

31

94

Recurrence 

interval 

(yean)

0.38

.73

.54

.88

1.50

5.00

.22

.23

.43

1.00

.86

.43

1.77

.33

.30

.77

1.36

.20

.42

.41

1.20

.46

.71

.22

.58

.23

.97

.32

824933 O - 49 - 28
398 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Coeur d'Alene River near Cataldo, Idaho, 1912, 1921-48

25

c

 

? c

-^

I S

r*

J

 >

H

^

^-» *

t* f

8

S

\

(*"

^

t

y

IT

^x

/

/

V

/

/

/

o u

/

 > c

i C

/

3 £5 if & § 5i s

RECURRENCE INTERVAL IN YEARS, FOR ANNUAL FLOODS

55 

50 

45 

40 

35 

30 

25 

20 

15 

10

5 

n

,x

X1 ^

^

++

? 

»»

^

r~~ -^

^

?s y

/ 

1

V

J1

/

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 6,210 SECOND-FEET
MAGNITUDE AMD FREQUENCY OP FLOODS

SPOKANE RIVER BASIN 

Coeur d'Alene River near Cataldo, Idaho--Continued

Year

1924

1925

1926

1926

1927

1927

1928

1929

1930

1931

1932

1932

1933

1933

1934

1934

1935

1936

Month

Dec.

Feb.

Mar.

Apr.

May

Apr.

Nov.

Dec.

Feb.

Apr.

May

June

Nov.

Dec.

Jan.

Mar.

Apr.

May

Mar.

Apr.

May

Feb.

Mar.

Apr.

Mar.

Apr.

May

Feb.

Mar.

Apr.

May

Nov.

Dec.

Apr.

May

June

Nov.

Dec.

Jan.

Mar.

Dec.

Mar.

Apr.

May

Apr.

May

Day

14

1

5

5

26

4

12

18

7

16

22

19

30

3

21

15

27

16

9

7

26

3

13

11

23

1

28

8

29

29

14

20

30

8

14

22

2

8

1

28

20

3

14

8

23

14

3

4

28

15

27

31

10

3

7

11

23

4

24

3

16

29

22

14

21

27

6

23

19

12

height 

(fit)

44.00

46.20

51.3

43.12

45.70

45.83

49.30

46.93

44.45

44.05

44.25

45.30

45.72

46.28

43.78

44.22

50.78

47.88

44.39

44.75

48.37

45.75

44.88

44.81

45.64

45.14

46.33

46.95

43.86

45.58

44.40

43.60

43.47

43.95

43.74

45.74

44.65

46.45

44.53

47.70

44.65

46.67

49.58

47.52

46.26

44.14

44.79

43.88

49.44

45.74

45.61

45.33

47.83

45.68

43.98

50.17

56.9

48.53

47.86

44.10

44.07

49.88

43.40

44.10

46.70

46.00

46.79

45.53

49.40

44.57

Discharge 

( eemtdrfeet)

7,820

13,100

27,600

6,430

11,900

12,200

21,700

15,000

9,090

8,250

8,670

11,000

11,900

13,400

7,830

8,670

26,100

16,400

8,460

9,610

18,500

11,900

9,830

9,610

11,400

10,300

13,100

14,800

7,670

11,400

8,730*

7,060

6,860

7,880

7,260

11,300

8,830

13,100

8,830

16,800

9,470

14,200

22,400

15,800

12,400

7,990

9,470

7,590

21,500

11,300

11,000

10,300

16,600

11,300

7,560

24,700

55,300

22,800

16,800

7,390

7,390

22,200

6,700

8,100

14,200

12,400

14,400

11,600

23,100

9,140

Annual floods

Order

(M)

4

25

5

14

24

27

21

8

10

1

20

7

Recurrence 

interval 

(yean)

7.50

1.20

6.00

2.14

1.25

1.11

1.43

3.75

3.00

30.0

1.50

4.29

Partial 

duration series

Order

(M)

135

53

4

151

66

64

13

40

111

124

119

84

67

51

134

120

5

33

122

103

23

68

97

102

75

89

54

43

138

76

117

146

147

133

145

79

115

55

116

28

106

45

10

36

61

130

107

139

14

80

85

90

32

81

140

7

1

9

29

141

142

11

148

128

46

62

44

74

8

110

Recurrence 

interval 

(yean)

0.22

.57

7.50

.20

.45

.47

2.31

.75

.27

.24

.25

.36

.45

.59

.22

.25

6.00

.91

.25

.29

1.30

.44

.31

.29

.40

.34

.56

.70

.22

.40

.26

.21

.20

.23

.21

.38

.26

.55

.26

1.07

.28

.67

3.00

.83

.49

.23

.28

.22

2.14

.38

.35

.33

.94

.37

.21

4.29

30.0

3.33

1.03

.21

.21

2.73

.20

.23

.65

.48

.68

.41

3.75

.27
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

SPOKANE RIVER BASIN 

Coeur d'Alene River near Cataldo, Idaho--Continued

Year

1937

1938

1939

1940

1941

1941

1942

1942

1943

1944

1945

1945

1946

1946

1947

1948

Month

Apr.

May

Mar.

Apr.

May

Mar.

Apr.

Feb.

Mar.

Apr.

May

Dec.

Apr.

Nov.

Mar.

Apr.

May

Apr.

Jan.

Feb.

Apr.

May

Dec.

Mar.

Apr.

May

Nov.

Dec.

Jan.

Feb.

Mar.

Apr.

May

Jan.

Apr.

May

Day

15

21

27

4

17

19

14

26

3

22

29

29

28

10

15

19

4

20

12

22

24

28

2

8

15

2

23

13

14

9

22

5

29

28

20

27

5

18

19

28

15

24

16

23

1

20

29

3

8

18

22

30

8

14

21

Gage 

height 

</«*>

46.78

46.10

45.70

47.40

44.23

55.15

43.49

45.17

44.90

45.62

46.17

44.00

45.11

44.40

44.00

43.35

44.54

45.97

44.86

44.01

45.41

45.24

46.10

45.68

48.40

44.64

44.26

43.73

45.20

45.35

44.02

47.35

45.55

46.33*

47.82

47.76

46.85

43.94

44.92

44.24

51.35

44.32

43.62

43.87

43.43

44.47

44.48

44.28

44.43

7.99

48.03

44.71

46.10

46.10

47.47

Period 1912, 1921-48

Discharge 

(MtxmA-ftet)

15,500

13,500

12,400

17,300

8,570

46,300

6,440

10,500

9,750

11,800

13,000

7,900

10,700

9,030

8,120

6,440

9,030

13,000

10,200

8,120

11,000

11,400

14,000

12,800

22,000

9,790

9,010

6,210

9,530

11,300

8,200

18,200

12,600

15,400

19,800

19,700

17,000

8,680

11,200

9,660

35,800

9,190

7,310

8,270

7,270

9,890

9,950

9,450

9,480

20,500

20,600

10,100

14,000

14,000

18,600

Annual floods

Older

(M)

17

2

22

26

28

23

9

29

15

13

3

11

Recurrence 

interval

(yean)

1.76

15.0

1.36

1.15

1.07

1.30

3.33

1.03

2.00

2.31

10.0

2.73

Partial 

duration series

Order

(M)

37

50

63

26

121

2

149

88

100

72

57

132

87

112

126

150

113

58

92

127

86

77

47

59

12

98

114

153

104

82

125

24

60

38

18

19

27

118

83

101

3

109

143

123

144

96

95

108

105

16

15

93

48

49

21

Recurrence 

interval

(year*)

0.81

.60

.48

1^15

.25

15.0

.20

.34

.30

.42

.53

.23

.34

.27

.24

.20

.27

.52

.33

.24

.35

.39

.64

.51

2.50

.31

.26

.20

.29

.37

.24

1.25

.50

.79

1.67

1.58

1.11

.25

.36

.30

10.0

.28

.21

.24

.21

.31

.32

.28

.29

1.88

2.00

.32

.62

.61

1.43

19,860 Mean annual
MAGNITUDE AND FREQUENCY OP FLOODS 401

SPOKANE RIVER BASIN 

Spokane River at Post Falls, Idaho

Location.- Lat. 47 0 42', long. 116°58', 1,500 feet downstream from power plant of Washington Water Power Co., 3,300 feet downstream from intake of Spokane Valley Farms 

Co.'s canal, and 1 mile west of Post Falls.

Drainage area.- 3,880 square miles.

Records available.- January 1913 to September 1948.

Gage.- Non-recording gage read once daily prior to Nov. 22, 1920; recording gage 

thereafter. Datum of gage is 2,000 feet above mean sea level, unadjusted.

Stage-discharge relation.- Defined by current-meter measurements below 40,100 secondfeet. ' 

Maximum flood of record.- 50,100 second-feet when recorder was not operating Dec. 25, 

1933 (determined from unpublished records collected by Washington Water Power Co.)

Remarks.- Spokane Valley Farms Go's canal and Rathdrum Prairie canal divert water 

above gage for irrigation. Regulation by Coeur d'Alene Lake at all but extreme 

high stages, at which time flow is affected by natural storage in lake (usable 

capacity, 160,000 acre-feet). Gage heights for period when non-recording gage 

was used are from graphs based on gage readings. Annual peaks are tabulated 

for information only; no computations of flood frequency are warranted owing to 

effects of regulation.

Year

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

- 1932

1933

1933

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1946

1948

Month

May

Apr.

Apr.

May May

Jan.

May May May May

May May

Apr.

Apr.

May

May May Mar.

Apr.

May

May

Dec.

May

Apr.

May

Apr.

May

Apr.

May

May

Apr.

Apr.

May May

Dec.

May

Dav is»jr

30

19

21

9

18

3

2

19

20

22

13

17

19

29

3

14

23

30

14

15

1

25

9

26

8

22

6

17

19

26

22

13

11

10,11

18

30

Gage fc-Ta,* neignt

77.82

74.80

72.32

76.73

79.23

79.12

76.00

74.25

74.32

74.12

73.35

72.52

75.22

72.13

74.68

74.45

71.76

71.53

72.13

75.72

74.93

75.47

77.81

75.00

77.39

75.00

73.57

74.57

77.68

71.30

75.22

76.53

75.68

78.98

Period

OiflctiinTro (**»***>

31,500

20,600

13,000

28,000

39,800

39,200

25,800

18,800

25,900

24,900

21,400

17,500

30,600

p!5,800

27,900

26,300

14,400

p!3,200

15,600

32,400

28,900

50,100

25,500

35,400

23,100

33,500

23,200

p!7,500

pq!8,000

P21.600

34,900

plO.OOO

23,700

29,400

25,700

40,300

Annual floods

Older

(M)

Bocuifeuc*) 

interval

Partial 

duration series

Older

(M)

Recurrence 

interv*!

Mean annual

p Affected by regulation.

q No gage-height record; discharge computed on basis of records for station at 

Spokane.
402 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

SPOKANE RIVER BASIN 

Spokane River at Spokane, Wash.

Location.- Lat. 47°39'30", long. 117°26'50", at Coehran Street In Spokane, 1 mile downstream from Spokane Palls and half a mile upstream from Latah Creek. Prior to July 

1, 1921, at various sites above Spokane Palls In Spokane.

Drainage area.- 4,350 square miles.

Records available.- April 1891 to September 1948.

"e.- Non-recording gage read once daily prior to July 31, 1915, recording gage thereafter. Gage datum elevations are as follows: Mar. 22, 1891, to Oct. 24, 1896, 

1,803.52 feet above mean sea level} Oct. 25, 1896, to July 23, 1911, unknown; July 24, 

24, 1911, to June 30, 1921, 1,800 feet above mean sea level; since July 1, 1921, 

1,700 feet above mean sea level. Elevations subject to correction to datum of 1929.

f

e-dlscharge relation.- Defined by current-meter measurements below 45,200 secondeeTI

Maximum flood of record.- 49,000 second-feet (estimated) May 31, 1894. 

.Remarks.- Vater for Irrigation diverted above station by Spokane Valley Farms Co.; maxImum diversion, 304 second-feet. Regulation for power operations by Coeur d'Alene 

Lake at all but extreme high stages, at which time flow Is affected by natural 

storage In lake (usable capacity, 160,000 acre-feet). Slight regulation by pondage 

at Spokane. Annual peaks are tabulated for Information only; no computations of flood 

frequency are warranted owing to effects of regulation.

St

Year

1892

1893

1894

1895

1896

1897

1898

1899

1900

1901

1902

1903

1904

1905

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1933

1935

1936

1937

1938

1939

1940

1941

Month

May

May

May

May

June

Apr.

May

May

Apr.

May

May

June

Apr.

June

Apr.

May

Apr.

June

Mar.

May

May

June

Apr.

May

May

May

Jan.

May

May

May

May

May

May

Apr.

Apr.

May

May

May

Apr.

Apr.

May

May

Dec.

May

Apr.

May

Apr.

May

Apr.

May

Day

31

21

31

10

7

23

1

29

10

20

26

6

23

8

27

23

27

7

25

9

24

1

19

23

 9

17

4

1

20

21

22

13

17

20

22

20

- 15

25

17

15

15

1

26

10

27

10

22

5

17

19

Gage 

htignt 

</**>

9.00

11.45

12.42

7.67

8.92

11.80

10.40

10.80

7.60

9.10

9.80

9.85

12.10

6.0

9.31

27.22

27.35

25.8

29.25

25.6

78.2

81.72

77.6

74.6

80.25

83.8

83.50

79.41

77.32

79.8

25.3

24.49

23.6

26.30

23.07

25.7

25.38

22.80

22.26

23.14

26.75

25.9

29.75

25.38

27.1

24.8

26.86

25.0

23.53

23.44

Discharge 

( KxmdrfnQ

21,800-

37,500

49,000

17,100

21,400

33,900

27,200

28,900

17,000

22,200

24,800

23,900

27,900

9,510

18,400

25,800

26,300

19,400

28,100

17,200

21,200

33,600

19,600

11,500

28,400

41,900

39,600

24,600

18,200

26,200

'26,300

22,000

17,800

31,700

pl5,800

28,200

26,600

14,700

p!2,900

15,800

33,500

28,500

47,800

25,400

33,700

22,100

32,700

23,300

p!6,500

p 16, 100

Annual floods

Ofdor

(M)

Recurrence 

interval 

ftwtf

f Partial _ 

duration serin

Order

(M) Marvel 

to-nt
KAONITODE AMD FREQUENCY OP FLOODS

SPOKANE RIVER BASIN 

Spokane River at Spokane, Wash. Continued

Year

1942 

1943 

1944 

1945 

1946

1946 

1948

Month

May 

Apr. 

Apr. 

May 

May

Dec. 

May

Day

26 

22 

15 

11 

10

18 

31

Gage 

height

23.97 

27.04 

22.10 

25.03 

26.17

25.48 

28.34

Period

Discharge 

(teamd-feet)

p 18, 400 

32,400 

pll,400 

22,800 

28,400

25,000 

39,600

Annual floods

Order

(M)

Recurrence 

interval 

(yean)

Partial 

duration aeries

Order

(M)

Recurrence 

interval

Mean annual

p Affected by regulation.

St. Joe River at Calder, Idaho

Location.- Lat. 47°16', long. 116°11', 150 feet aouthweat of Chicago, Milwaukee

& Pacific Railway station at Calder. April 1911 to September 1912 at alte 2

downstream.

Drainage area.- 1,080 square miles.

Records available.- April 1911 to September 1912, July 1920 to September* 1948. 

Gage.- Non-recording gage read once daily 1911-12. Recording gage thereafter.

recording gage is about 2,100 feet above mean sea level. 

Stage-discharge relation.- Defined by current-meter measurements below 22,000 secondfeet. 

Maximum flood of record.- 53,000 second-feet Dec. 23, 1933, computed on baals of slope

between gages downstream. 

Remarks.- Ho diversion above station. Some regulation on upstream tributaries for

logging operations. Gage heights for period when non-recording gage was used are

from graphs based on gage readings. Numerous shifts in stage-discharge relation due

to log Jams and channel changes.

St. Paul 

milea

Datum of

Year

1911

1912

1920

1921

1921

1922

1923

1924

Month

Apr.

May

June

Apr.

May

Dec.

Feb.

Mar.

Apr.

May

Dec.

Apr.

May

June

Jan.

Apr.

May

June

Apr.

May

Day

25

6

18

2

3

12

30

10

16

21

27

30

13

5

18

13

22

8

16

1

13

22

27

5

18

5

8

2

18

28

9

26

10

13

3

13

Gage 

height

8.1

8.7

6.82

6.82

5.6

6.83

6.4

8.4

8.7

9.1

7.6

85.40

83.45

83.50

86.06

84.50

85.50

87.52

87.46

83.50

85.35

83.76

83.96

85.48

87.77

86.07

84.19 

84.56

86.14

85.83

86.60

85.50

85.03

84.20

86.16

86.45

Discharge 

(teemir-ftet)

12,600

14,400

8,660

8,660

5,520

8,660

7,540

13,500

14,400

15,700

11,000

10,600

5,350

5,450

12,700

7,900

10,900

17,400

17,400

5,540

10,500

6,220

6,700

10,800

17,600

12,000

6,540

7,560

12,000

11,100

13,600

10,200

8,700

6,540

12,300

13,100

Annual floods

Order

(M)

17

14

9

8

19

21

interval 

(yean>

1.82

2.21

3.45

3.88

1.63

1.48

Partial 

duration series

Order

(M)

145

93

109

41

30

22

64

73

148

147

46

106

66

12

13

144

75

132

123

68

11

55

125

108

56

63

40

78

91

126

52

44

Recurrence 

interval 

(year*)

0.21

.32

.28

.73

1.00

1.36

.47

.41

.20

.20

.65

.28

.45

2.50

2.31

.21

.40

.23

.24

.44

2.73

.55

.24

.28

.54

.48

.75

.38

.33

.24

.58

.68
DISCHARGE, IN THOUSANDS OF SECOND

5 .3

= 1.0

10

30

40

50

8 8 S 

1.10

1.50

10

30

150

?on

.

^

-4
MAGNITUDE AND FREQUENCY OP FLOODS 405

St,

SPOKANE RIVER BASIN 

Joe River at Calder, Idaho Continued

Year

1924

1925

1926

1926

1927

1927

1928

1929

1930

1931

1932

1932

1933

1933

1934

1935

1936

Month

Dec.

Feb. 

Apr.

May

Apr.

Nov.

Dec.

Apr. 

May

June

Nov.

Dec.

Jan.

Mar.

Apr.

May

Mar.

Apr.

May

Apr.

May

Apr.

May

Feb.

Mar.

Apr.

May

Dec.

Apr.

May

June

Oct.

Nov.

Dec.

Jan.

Mar.

Apr.

Mar.

Apr.

May

Apr.

May

Day

14

4 

12

17

7

21

19

30

25

29

2

28 

16

9

7

25

3

12

23

1

28

8

29

23

29

22

8

15

24

3

8

3

15

27

19

3

14

5

14

22

3

28

15

27

9

29

3

11

23

4

23

16

29

14

24

14

16

21

27

6

23

18

5

12

Gage 

height 

<f*t>

84.16

90.2 

87.38

87.17

86.37

86.53

85.97

84.90

83.75

84.86

85.66

87.92 

87.95

86.76

85.84

87.03

85.60

89.09

84.55

84.01

86.50

87.47

83.74

83.94

84.92

85.22

84.43

84.83

84.70

84.10

84.09

85.00

84'. 50

86.05

83.76

84.32

86.63

87.33

87.48

86.83

84.07

- 87.19

85.39

86.48

88.23

84.81

86.78

87.85

92.5

86.36

86.25

84.47

88.43

86.49

86.32

84.13

85.73

86.08

85.74

86.71

86.90

88.65

87.00

86.53

Discharge 

Awond^K)

6,800

617,000 

17,200

16,600

13,800

14,100

11,500

8,330

5,630

8,330

10,600

17,700 

18,000

14,000

10,900

14,600

10,300

ell, 500

7,530

6,060

13,000

16,600

5,570

6,010

8,510

9,360

7,450

8,510

8,240

6,710

6,470

8,790

7,450

12,100

6,010

7,200

14,100

16,600

17,400 

14,800

6,710

15,900

9,940

13,400

19,600

7,970

14,100

18,200

53,000

12,400

12,100

6,950

20,200

11,800

11,500

5,760

9,660

10,700

9,660

12,700

13,400

20,000

13,800

12,000

Annual floods

Older

(M)

11

23

7

13

25

27

26

10

6

1

20

5

R0CU1T6HC6

intern! 

(your*)

2.82

1.35

4.43

2.38

1.24

1.15

1.19

3.10

5.17

31.0

1.55

6.20

Partial 

duration series

Order

(M)

120

16 

15

18

36

31

60

98

142

99

74

10 

9

34

67

28

77

61

110

133

45

19

143

135

95

87

111

96

1OO

121

130

90

112

53

136

114

32

20

14

26

122

21

80

42

7

105

33

8

1

50

54

117

5

58

62

138

84

72

83

47

43

6

37

57

Recurrence 

interval / 1, ... ,i (yMfW

0.25

1.88 

2.00

1* 67

.83

.97

.50

.31

.21

.30

.41

3.00 

3.33

OQ

 oo

.45

1.07

.39

.49

.27

.23

.67

1.58

.21

.22

.32

.34

.27

.31

.30

.25

.23

.33

.27

.57

.22

.26

.94

1.50

2.14

1.15

.25

1.43

.38

.71

4.28

.29

.91

3.75

30.0

.60

.56

.26

6.00

.52

.48

.22

.36

.42

.36

.64

.70

5.00

.81

.53
406 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

SPOKANE RIVER BASIN 

St. Joe River at Calder, Idaho Continued

Year

1937

1938

1939

1940

1941

1941

1942

1942

1943

1944

1945

1945

1946

1946

1947

1948

Month

Apr.

May

Apr.

May

Mar.

Apr.

Mar.

Apr.

May

May

Bee.

Apr.

Nov.

Mar.

Apr.

May

June

May

Jan.

May

Dec.

Apr.

May

Bee.

Mar.

Apr.

May

June

Jan.

Apr.

May

Day

15

21

27

4

15

26

18

1

16

26

26

3

22

30

27

15

20

3

11

18

3

14

22

24

28

2

8

16

2

26

10

19

7

16

13

5

29

20

26

6

18

11

15

22

20

8

9

7

J.8

22

30

8

14

26

Gage

height 

(f*t)

85.20

85.20

84.87

86.68

86.14

85.34

93.2

86.80

85.54

85.98

84.51

84.42

86.03

86.90

84.26

84.66

84.70

84.82

85.21

83.86

85.99

85.76

85.60

84.11

84.50

84.69

84.94

87.33

85.76

86.69

85.10

85.47

83.96

84.04

84.14

87.53

84.52

87.04

87.40

87.22

85.82

85.56

88.98

84.0~3

85.14

87.54

84.10

85.38

86.13

87.37

85.46

86.40

86.57

89.04

Period 1911-12, 1921-48

Discharge

(taxmd-ft*)

8,140

8,140

7,150

12,700

10,700

8,400

46,000

13,800

9,800

11,000

6,480

6,480

10,700

13,800

6,060

6,920

6,920

7,150

8,140

5,280

10,400

10,100

9,510

5,660

6,270

6,700

7,390

14,800

9,510

12,400

7,880

8,670

5,280

5,470

5,660

15,500

6,520

13,900

15,200

14,600

9,860

9,110

23,400

5,660

8,170

16,800

5,800

8,620

10,800

15,700

8,830

11,800

12,500

23,700

Annual floods

Order

(M)

22

2

18

28

30

24

16

29

15

4

12

*

3

Recurrence

interval

(yean)

1.41

15.5

1.72

1.11

1.03

1.29

1.94

1.07

2.07

7.75

2.58

10.?

Partial 

duration series

Order

(M)

102

103

115

48

71

97

2

58

82

65

128

129

70

39

134

119

118

116

104

194

76

79

85

139

131

124

113

27

86

51

107

92

150

146

140

24

127

35

25

29

81

88

4

141

101

17

137

94

69

23

89

59

49

3

R6CHLT6n06

interval

(yean)

0.29

.29

.26

.62

.42

.31

15.0

.79

.37

.46

.23

.23

.43

.77

.22

.25

.25

.26

.29

.20

.40

.38

.35

.22

.23

.24

.27

1.11

.35

.59

.28

.33

.20

.21

.21

1.25

.24

.86

1.20

1.03

.37

.34

7.50

.21

.30

1.76

.22

.32

.43

1.30

.34

.51

.61

10.0

16,700 Mean annual

e Estimated; stage-discharge relation affected by Ice.
MAGNITUDE AND FREQUENCY OF FLOODS 407

OKANOGAN RIVER BASIN

Okanogan River near Tonasket, Wash.

(International gaging station) 

(Formerly called Okanogan River at Okanogan)

Location.- Lat. 48°38'00", long. 119 0 27'50", 1,000 feet upstream from Chewlllken Creek 

and 5£ miles south of Tonasket. Prior to Oct. 1, 1925, at site, at Okanogan, a 

quarter of a mile upstream from Salmon Creek, several miles below present site.

Drainage area.- 7,250 square miles; 7,740 square miles at former site.

Records available.- April 1929 to September 1948. May 1911 to September 1925, equivalent records at site at Okanogan, a quarter of a mile upstream from Salmon Creek 

(published as Okanogan River at Okanogan).

Gage.- Non-recording gage read twice daily to June 1916; once daily thereafter to 

September 1925. Recording gage April 1929 to September 1948.

Stage-discharge relation.- Defined by current-meter measurements.

Maximum floodof record.- 40,500 second-feet May 31, 1948.

Remarks.- Many diversions above station for irrigation. Flow subject to natural 

regulation by several lakes and to some artificial regulation by Okanagan Lake as 

an aid to navigation. Gage-heights for period when non-recording gage was used 

are from graphs based on gage readings. Stage-discharge relation shifts frequently. 

This station is one of the international gaging stations maintained by the United 

States under agreement with Canada.

Year

1912

1913

1914

1915

1916

1917

1918

1919

1920

1921

1922

1923

1924

1924

1925

1929

1930

1931

Month

May

June

May

June

May

May

June

May

June

Jan.

May

June

May

June

May

June

July

May

June

May

June

Apr.

May

June

May

Dec.

Apr.

May

May

June

Apr.

May

June

May

Day

22

5

18

4

18

26

8

20

15

31

18

3

6

16

1

15

2

30

23

18

19

2

27

9

 0

7

30

24

12

20

15

14

22

25

10

25

18

9

4

16

Gage 

height 

(feet)

9.62

11.20

9.80

9.30

8.71

6.98

9.81

12.22

7.20

11.20

11.28

6.20

9.27

9.80

9.10

11.18

7.90

12.27

10.31

7.75

8. Op

7.66

12.10

12.44

9.45

12.50

5.76

8.67

10.43

10.94

5.57

5.67

11.38

10.14

10.16

9.10

9.89

10.06

9.75

10.23

Discharge 

( tamdjest)

13,700

18,800

14,300

12,800

11,000

7,220

14,300

22,200

7,350

16,200

16,500

5,600

11,700

12,900

11,300

16,200

8,520

18,700

13,900

8,150

11,000

10,200

20,100

20,800

13,900

20,600

5,820

12,000

' 16,200

17,800

5,470

5,64.0

19,200

8,310

8,500

6,460

7,930

8,310

7,720

8,480

Annual floods

Older

(M)

21

10

20

33

3

15

16

11

26

5

6

17

13

8

29

31

30

Recurrence 

iaterad 

(y«*n>

1.67

3.50

1.75

1.06

11.7

2.33

2.19

3.18

1.35

7.00

5.84

2.06

2.70

4.38

1.21

1.13

1.17

Partial 

duration series

Order

(M)

28

11

24

35

41

66

25

3

64

17

16

74

38

34

39

18

53

12

26

58

42

46

8

5

27

6

71

36

19

14

75

73

9

56

54

69

59

57

61

55

Recurrence 

intervtl 

(yean)

1.25

3.18

1.46

1.00

.85

.53

1.40

11.7

.55

2.06

2.19

.47

.92

1.03

.90

1.94

.66

2.92

1.35

.60

.83

.76

4.38

7.00

1.30

5.84

.49

.97

1.84

2.50

.47

.48

3.89

.62

.65

.51

.59

.61

.57

.64
40~8 FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

Okanogan River near Tonasket, Wash., 1912-25, 1929-48

45 

40 

35 

30 

25 

20 

15 

10

t 5

LJ 

I °

O

o%L. 

O

i ' 

(/> 

O

Z

g«

cc

I 40

0

35 

30 

25 

20 

15 

10 

5 

0

s

^

^

^^

,X^

 *-

^" ^ < *

-*-"

,^

/

7

f

/

382 5?" « > *« S'SSSSg § g | 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

/

^

*--

*****

s"**- 7*-, = 

- *

/

/

.-/

/ 

/

/

evi eo * in p CM co * in O o o ^ g 

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 5.180 SECOND-FEET
MAONITDDE AND FREQUENCY OP FLOODS 409

OKANOQAN RIVER BASIN 

Okanogan River near Tonasket, Wash. Continued

Year

1932

1933

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

Feb.

May

June

May

June

Oct.

Apr.

May

June

May

June

June

May

May

May

May

Apr.

May

Apr.

May

June

May

June

June

May

May

May

Day

29

12

15

1

7

18

29

27

17

31

2

6

16

4

5

2

28

17

30

12

26

3

23

28

21

28

11

17

3

16

2

13

29

10

29

31

Gage 

heigk 

(f**>

9.83

11.52

10.80

9.33

13.47

15.37

8.84

18.31

13.36

13.06

14.08

11.61

12.60

12.18

14.16

11.77

16.51

12.35

11.39

10.12

10.61

9.81

10.07

15.78

10.18

13.18

13.41

12.29

13.43

12.36

15.74

14.72

15.12

13.47

12.29

21.79

Period 1912-25, 1929-48

Discharge 

 <H<xml-fttt)

7,640

10,600

9,340

6,790

15,600

20,200

5,940

26,600

13,700

13,100

14,900

9,800

11,800

11,000

15,100

10,000

21,400

11,200

9,210

6,640

7,540

5,180

5,780

18,900

7,280

13,100

13,500

7,890

10,200

9,220

18,200

16,000

16,900

13,400

11,000

m40,500

Annual floods

Order

(M)

27

7

2

19

24

18

4

25

32

34

1 9

22

28

12

14

23

1

interval

(yean)

1.30

5.00

17.5

1.84

1.46

1.94

8.75

1.40

1.09

1.03

3.89

1.59

1.25

2.92

2.50

1.52

35.0

Partial 

duration series

Older

(M)

62

45

50

67

21

7

70

2

29

32

23

49

37

43

22

48

4

40

52

68

63

76

72

10

65

33

30

60

47

51

13

20

15

31

44

1

Recurrence 

internl

<*** >

0.56

.78

.70

.52

1.67

5.00

.50

17.5

1.21

1.09

1.52

.72

.95

.81

1.59

.73

8.75

.88

.67

.52

.56

.46

.49

3.50

.54

1.06

1.17

.58

.74

.69

2.69

1.75

2.33

1.13

.80

35.0

15,720 Mean annual

m Provisional, subject to revision.

Simiikameen River near Nighthawk, Wash.

(International gaging station) 

(Formerly called Similkameen River near Oroville)

Location.- Lat. 48"59'10", long. 119°37'00", about l£ miles downstream from Nighthawk 

and 12 miles upstream from mouth. Prior to Oct. 1, 1928, at Okanogan Valley Power 

Go's plant, 4 miles upstream from Oroville and about 8 miles downstream from Nighthawk.

Drainage area.- 3,420 square miles; 3,450 square miles at former site.

Records available.- September 1928 to September 1948. May 1911 to September 1928 at 

site 4 miles upstream from Oroville (published as Similkameen River near Oroville); 

records equivalent if flov in Oroville-Tonasket Irrigation District canal is included.

Page.- Non-recording gage read twice daily prior to Oct. 1, 1928, recording gage thereafter. Datum of gage at mean sea level Mar. 4, 1924, to Sept. 30, 1928. Datum of 

gage prior to and subsequent to this period not known.

Stage-discharge relation.- Defined by currenb-meter measurements belov 36,100 secondfeet.

Maximum flood of record.- 38,600 second-feet May 30, 1948.

Remarks.- Orovllle-Tonasket Irrigation District canal diverts water at a point threequarters of a mile downstream from gage near Nighthawk and about 6 miles upstream 

from former site near Oroville. Diversion, which began in April 1916, is small part 

of total flov. Some regulation at high stage caused by natural diversion into and 

release from Palmer Lake. Sage heights for period when non-recording gage was used 

are from graphs based on gage readings. This station is one of the international 

gaging stations maintained by the United States under agreement with Canada.
FLOODS OF MAY-JOKE 1948 IN COLUMBIA RIVER BASIH 

Similkameen River near Highthawk, Wash., 1912-48

40 

36 

32 

28 

24 

20 

16

12 

t

UJ

u. a

i

o

U 4

UJ

en 

u. 

O 0 

en <

Q

cn 

O

z

UJ

o at

I 40

a 

36

32 

28 

24 

20 

16 

12 

8 

4 

0

^

r*J

,/

1

I

1

^

r**L^

 4 /

/

/

/

'

/

/

-

9 p -« 8°" « « o» fo ° 8 8 8 e 

RECURRENCE INTERVAL. IN YEARS, FOR ANNUAL FLOODS

/

^

* 

/'

-< 01 m ^ 10

y-^

^

/' -*-

 «-

- -^

/

.^/

/

/

/

/

q «« *» o S29S

RECURRENCE INTERVAL IN YEARS. FOR FLOODS ABOVE 4,750 SECOND-FEET
MAGNITUDE AND FREQUENCY OF FLOODS 411

OKANOGAN RIVER BASIN 

Slmilkameen River near Nighthawk, Wash.--Continued

Year

1912

1913-

1914

1915

1916

1917

.1918

1919

1920

1921

1922

1923

1924

1924

1925

1926

1927

1928

1929

Month

May

June

May

June

Apr.

May

May

June

May

June

Jan.

May

June

May

June

May

June

July

May

June

May

June

Apr.

May

June

July

Hay

June

Dec.

Apr.

May

Apr.

May

June

Apr.

May

May

June

Day

16

22

4

3

17

3

17

20

30

6

19

14

29

9

17

2

5

16

31

14

2

28

21

18

22

2

26

8

19

5

28

10

23

10

8

4

17

3

14

13

21

20

30

18

25

9

28

23

23

9

Gage 

height 

(ftt>

13.18

13.73

16.92

10.46

13.80

12.90

11.70

7.56

8.70

13.70

18.30

9.25

15.70

14.38

14.88

7.62

12.80

13.86

11.67

16.20

9.80

17.84

13.09

9.96

11.87

11.35

18.23

18.00

14.70

18.54

8.80

13.20

13.25

15.80

10.30

971.85

979.33

973.32

971.90

971.58

979.32

971.60

972.05

973.68

973.33

978.84

971.91

980.56

9.14

8.94

Discharge 

(»econd-feet)

12,100

12,800

17,900

8,200

13,000

11,600

9,880

4,750

5,920

12,800

20,600

6,980

16,400

14,300

15,100

5,160

11,900

13,600

10,300

17,200

7,740

19,600

12,400

7,750

10,400

9,700

20,800

20,400

14,200

21,400

5,310

11,600

11,600

16,200

7,240

5,580

18,300

7,680

5,710

5,320

18,300

5,320

5,840

8,320

7,680

17,300

5,710

20,700

8,500

8,100

Annual floods

Older

(M)

25

13

24

35

7

17

16

10

27

5

3

18

11

12

36

15

6

32

Recurrence 

interval 

(veart)

1.52

2.92

1.58

1.09

5.43

2.24

2.38

3.80

1.41

7.60

12.7

2.11

3.45

3.17

1.06

2.53

6.33

1.19

Partial 

duration series

Order

(M)

39

35

14

65

34

41

52

93

82

36

7

76

18

26

23

92

40

30

48

17

71

11

38

68

47

54

5

8

29

3

91

43

42

19

75

87

12

72

85

89

13

90

83

64

73

16

86

6

61

66

Recurrence 

interval 

(ytan)

0.97

1.09

2.72

.58

1.12

.93

.73

.41

.46

1.05

5.43

.50

2.11

1.46

1.65

.41

.95

1.27

.79

2'. 24

.54

3.46

1.00

.56

.81

.70

7.60

4.75

1.31

12.7

.42

.88

.90

2.00

.51

.44

3.17

.53

.45

.43

2.92

.42

.46

.59

.52

2.38

.44

6.33

.62

.58
412 FLOODS OP MAY-JUNE 1948 IK COLUMBIA RIVER BASDf

OKANOGAN RIVER BASIN 

Slmilkameen River near Nlghthawk, Wash. Continued

Year

1930

1931

1932

1933

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

Apr.

May

June

May

June

Feb.

May

June

Apr.

June

Oct.

Apr.

May

Mey

June

July

May

June

June

May

May

May

May

June

Apr.

May

Apr.

May

June

May

June

June

Apr.

May

June

Apr.

May

May

Day

24

17

8

3

15

1

28

11

14

29

7

17

29

26

16

30

31

7

2

5

15

3

4

1

27

16

29

25

2

8

22

27

20

27

10

16

2

1

27

12

28

15

29

9

27

30

Gage 

height

8.26

8.93

9.08

9.05

9.49

7.51

9.22

10.0

9.46

8.01

11.45

13.30

7.78

14.96

11.00

10.77

11.42

11.29

8.19

9.50

10.34

9.91

11.90

9.50

13.60

9.52

8.74

7.21

7.23

7.20

13.09

8.13

11.11

11.14

8.77

9.72

12.40

7.91

11.69

11.93

10.38

8.81

11.43

10.43

17.62

Period 1912-48

Discharge

6,930

8,100

8,500

8,330

9,380

5,370

8,590

10,200

9,190

6,210

14,600

20,000

5,830

25,800

13,400

12,800

14,600

14,300

6,600

9,310

11,4"00

10,300

16,100

9,310

21,400

klO.OOO

9,310

7,550

4,750

4,750

4,750

20,000

6,340

13,400

13,400

7,750

9,740

17,600

5,960

15,300

15,900

11,500

7,750

14,300

11,500

m38,600

Annual floods

Order

(M)

33

31

28

8

2

21

26

19

4

29

34

37

9

23

30

14

20

22

1

Recurrence

interval

1.15

1.22

1.36

4.75

19.0

1.81

1.46

2.00

9.50

1.31

1.12

1.03

4.22

1.65

1.27

2.72

1.90

1.73

38.0

Partial 

duration aeries

Older

(M)

77

67

62

63

55

88

60

50

59

80

24

9

84

2

31

37

25

27

78

56

46

49

20

57

4

51

58

74

95

94

96

10

79

33

32

69

53

15

81

22

21

44

70

28

45

1

R6CIUMDC0

muftvw tiil-mra!

0.49

.57

.61

.60

.69

.43

.63

.76

.64

.48

1.58

4.22

.45

19.0

1.23

1.03

1.52

1.41

.49

.68

.83

,78

1.90

.67

9.50

.74

.66

.51

.40

.40

.40

3.80

.48

1.15

1.19

.55

.72

2.54

.47

1.73

1.81

.86

.54

1.36

.84

38.0

15,400 Mean annual

k Estimated . 

m Provisional, subject to revision.
MAGNITUDE AND FRB3UENCY OF FLOODS 413

METHOW RIVER BASIN 

Methow River at Twisp, Wash.

Location.- Lat. 48"21'40", long. 1200 06'50", at highway bridge at Twlsp, a quarter of a

mile downstream from Twlsp River. 

Drainage area.- 1,330 square miles.

Records available.- June 1919 to September 1929, October 1933 to September 1948. 

Gage.- Non-racording gage read twice daily prior to Aug. 1, 1922, once daily Aug. 1, 

T922, to Sept. 30, 1929, Oct. 31 to Dec. 18, 1933. Recording gage Dec. 19, 1933, to

Sept. 30, 1948. 

Stage-discharge relation.- Defined by current-meter measurements below 10,100 second-feet

and by slope-area measurement of peak discharge. 

Maximum flood of record.- 40,600 second-feet May 29, 1948. 

Remarks.- Water diverted above station for irrigation by two canals, of Methow Valley

Irrigation District, by Risley ditch, and by many other ditches. Gage heights for

period when non-recording gage was used are from graphs based on gage readings.

Year

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1934

1935

1936

1937

Month

June

July

May

June

May

June

May

June

May

June

Apr.

May

June

Apr.

May

June

May

June

May

June

Mar.

Apr.

May

June

May

June

July

Apr.

May

June

May

June

Day

16

1

22

5

22

18

4

1

10

22

9

16

2

12

20

21

26

30

17

25

8

21

13

23

23

8

31

14

24

16

30

9

9

23

31

7

16

24

5

15

3

8

27

3

11

17

22

Gage 

height 

(ft*)

6.00

5.90

9.93

10.50

7.20

8.60

10.04

5.30

7.60

7.20

8.10

9.21

5.64

5.63

9.47

6.22

6.56

5.10

6.34

5.27

9.92

8.95

5.10

4.98

6.25

6.16

5.36

7.41

10.02

7.15

7.69

6.41

5.65

7.78

7.91

8.06

4.90

5.32

5.40

6.07

8.72

6.33

6.84

8.03

7.31

8.76

7.39

Discharge

4,480

4,320

12,300

13,600

6,630

9,470

12,500

3,360

7,410

6,630

8,420

10,800

3,840

3,840

11,400

4,820

5,510

3,050

5,190

3,500

12,400

10,400

3,200

3,050

5,010

5,010

3,980

8,350 .

15,200

7,870

9,100

6,070

4,540

9,580

9,840

10,400

3,180

3,890

4,070

5,360

12,000

5,900

7,060

10,100

8,300

12,300

8,550

Annual floods

Order

(M)

24

4

6

19

12

11

25

7

14

23

3

15

9

8

Recurrence 

interval 

<V>an)

1.08

6.50

4.33

1.37

2.16

3.36

1.04

3.72

1.86

1.13

8.67

1.73

2.89

3.25

Partial 

duration series

Order

(M)

69

70

8

4

43

24

6

87

37

44

32

15

80

81

14

64

54

93

59

86

7

17

89

94

61

62

76

33

3

36

26

47

68

22

20

18

90

78

74

56

10

49

39

19

34

9

31

R0CUIF6BC6

internl

ftt*mm-m\ \Jfft»IV

0.38

.37

3.25

6.50

.60

1.08

4.33

.30

.70

.59

.81

1.73

.32

.32

1.86

.41

.48

.28

.44

.30

3.72

1.53

.29

.28

.43

.42

.34

.79

8.67

.72

1.00

.55

.38

1.18

1.30

1.44

.29

.33

.35

.46

2.60

.53

.67

1.37

.76

2.89

.84

824933 O - 49 - 29
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Methow River at Twisp, Wash., 1920-29, 1934-48

I

45

40

35

30

25

20

15

ffi 10 

u.

Q

O 

111 trt o

S 2 S

CM ro^-m O mo o o o 

 -« «-« CM ro v m

RECURRENCE INTERVAL. IN YEARS, FOR ANNUAL FLOODS

o

ui 

o

<

X

o

o 45

40

35

-" 0

 *

c

^

1 *t a

**

 >

S

f

 *

» ***

O C\

*-*-»-*

rr

- -

^

-r^

f If

* 

1

-* 

/

/

/

/

/

o c

/

1 S> £5 8

RECURRENCE INTERVAL. IN YEARS, FOR FLOODS ABOVE 3,050 SECOND-FEET
MAGNITUDE AMD FREQUENCY OP FLOODS

METHOW RIVER BASIN 

Methow River at Twlsp, Wash. Continued

Year

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

May

June

May

May

June

May

June

Apr.

May

June

July

Apr.

May

June

July

May

June

May

June

Apr.

May

June

July

Apr.

May

June

May

June

Day

1

27

8

14

22

4

17

29

11

24

1

13

2

13

25

1

7

13

22

26

7

15

1

20

26

10

18

1

8

16

2

17

9

31

21

27

10

28

14

3

19

29

8

28

9

29

6

17

Gage 

heigkit 

</«0

6.48

9.15

7.80

6.35

6.72

4.95

5.99

5.44

6.53

7.57

6.24

5.20

6.10

5.66

5.23

5.40

5.89

5.53

5.22

10.76

7.60

6.17

5.27

5.84

7.47

7.40

6.89

6.69

4.79

6.12

5.94

5.40

5.79

8.42

6.34

5.39

7.89

8.29

7.26

4.93

4.80

5.69

7.72

6.81

6.15

12.96

7.39

7.27

Period 1920-29, 1934-48

Discharge 

(ttcoiul-fttt)

6,180

13,300

9,560

5,820

6,680

3,160

5,020

3,940

6,300

9,020

5,580

3,530

5,240

4,300

3,610

3,850

4,800

4,110

3,590

21,300

9,180

5,430

3,680

4,910

8,890

8,600

7,260

6,770

3,120

5,570

5,240

4,150

4,730

11,700

6,010

4,070

9,590

10,700

8,120

3,280

3,050

4,660

8,920

6,940

5,680

40,600

11,800

11,500

Annual floods

Order

(M)

5

22

16

21

2

18

20

10

13

17

1

Rdcumiico 

interval 

(yean)

5.20

1.18

1.62

1.24

13.0

1.44

1.30

2.60

2.00

1.53

26.0

Partial 

duration series

Order

(M)

46

5

23

50

42

91

60

77

45

27

52

85

57

71

83

79

65

73

84

2

25

55

82

63

29

30

38

41

92

53

58

72

66

12

48

75

21

16

35

88

95

67

28

40

51

1

11

13

Recurrence 

interol 

(yean)

0.56

5.20

1.13

.52

.62

.29

.43

.34

.58

.96

.50

.31

.46

.37

.31

.33

.40

.36

o31

13.0

1.04

.47

.32

.41

.90

.87

.68

.63

.28

.49

.45

.36

.39

2.16

.54

.34

1.24

1.62

.74

.30

,27

.39

.93

.65

.51

26.0

2.36

2.00

11 , 300 Mean annual

CHELAN RIVER BASIN 

Stehekin River at Stehekln, Wash.

Location.- Lat. 48°19'50", long. 120°41'40", 1,200 feet upstream from Boulder Creek and 

 2 miles upstream from Lake Chelan and Stehekin. Prior to Aug. 19, 1911, at site at

Stehekln; Aug. 19, 1911, to Oct. 31, 1915, at site a quarter of a mile downstream

from Boulder Creek.

Drainage area.- 372 square miles, including that of Boulder Creek. 

Records available.- October 1910 to October 1915, January 1927 to September 1948. Flow

of Boulder Creek included. 

Gage.- Non-recording gage read once daily October 1910 to October 1915. Recording gage

since January 1927. 

Stage-discharge relation.- Defined by current-meter measurements below 8,980 second-feet

and by slope-area measurement of peak discharge. 

Maximum flood of record.- 18,800 second-feet May 29, 1948. 

Remarks.- At very high stages small part of flow is diverted above gage by natural

sloughs. Gage heights for period when non-recording gage was used are from graphs

based on gage readings.
FLOODS OP MAY-JUNE 1948 IN COLOMBIA RIVER BASIN 

Stehekin River at Stfehekin, Wash., 1911-15, 1927-48

12

G ' 

£\ 2 

o

UJ °

u.

(/) < 0

'

3. 8

 * rX

3 £

 J f

/

>

 I

r*

>

'^

s *

y

»-* 

f i

/ 

IT

-^

>

i^

c

/>

3 u

/

3 g

/

/

3 S; sf S? 8 S! 1

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

CM co CM m * 10 2 8 % 3 g 

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 3.320 SECOND-FEET
MAGNITUDE AND FREQUENCY OP FLOODS 417

CHELAN RIVER BASIN 

Stehekln River at Stehekin, Wash. Continued

Year

1911

1912

1913

1914

1915

1927

1927

1928

1929

1930

1931

1931

1932

1933

Month

Apr.

May

.June

July

May

June

May

July

May

June

July

May

Apr.

May

June

Oct.

Dec.

May

June

July

Oct.

May

June

Apr.

May

June

July

May

June

Feb.

May

June

Nov.

Apr.

May

June

July

Day

25

4

18

1

12

22

5

16

25

14

20

13

19

25

10

25

28

2

23

2

17

3

9

27

17

24

8

22

29

19

2

22

25

5

12

23

3

9

23

8

15

24

22

16

7

10

21

13

1

14

31

8

16

26

27

13

20

4

13

21

13

17

28

26

30

4

15

2

8

16

25

Gage 

height 

(foet)

3.3

3.7

3.5« -

5.2

6.0

4.0

3.3

3.9

3.1

5.40

5.65

5.15

5.55

5.46

4.10

5.40

3.8

4.30

5.14

5.40

5.37

4,88

3,85

22,60

23.98

22.61

26,39

24.30

22.92

22,68

22.96

26.62

25.88

22.72

23.26

24.04

22.65

24.04

24.13

23.98

23.47

22.74

22.94

23.50

23.17

23.30

22.75

22.79

24.50

24.91

24.16

24.18

23.32

23.20

26.11

23.61

23.40

22.85

25.01

24.15

23.62

24.30

23.03

22.87

23.40

23.89

26.94

23.86

23.98

24.40

23.25

Discharge 

(Keond-feet)

4,360

5,280

4,800

9,190

11,400

5,430

3,830

5,190

3,390

6,420

6,860

5,980

6,860

6,640

3,820

6,420

3,330

4,110

5,620

6,230

6,230

5,220

3,320

3,650

6,080

3,650

11,100

6,310

3,840

3,510

3,920

11,400

9,830

3,510

4,440

5,850

3,430

5,850

6,050

5,850

4,800

3,590

3,750

4,720

4,080

4,350

3,820

3,890

6,850

7,670

6,000

6,000

4,350

4,180

10,200

4,970

4,630

3,750

7,800

6,120

4,970

6,330

4,030

3,790

4,670

5,560

12,100

5,560

5,750

6,570

4,350

Annual floods

Older

(M)

4

20

21

22

27

6

5

23

25

17

7

3

Recurrence 

interval 

<»«*>

7.00

1.40

1.33

1.27

1.04

4.87

5.60

1.22

"1.12

1.65

4.00

9.33

Partial 

duration series

Order

(M)

117

83

97

12

4

80

145

87

171

50

37

64

38

45

146

51

73

125

74

55

56

85

174

155

60

156

6

54

144

162

137

5

10

163

115

67

169

68

61

69

98

159

150

101

128

118

147

138

39

25

63

62

119

124

8

92

108

151

24

59

93

52

132

148

106

75

3

76

72

46

120

Recurrence 

intern! 

(yean)

0.24

.34

.29

2.33

7.00

.35

.19

.32

.16

.56

.76

.44

.74

.62

.19

.55

.16

.22

.38

.51

.50

.33

.16

.18

.47

.18

4.67

.52

.19

.17

.20

5.60

2.80

.17

.24

.42

.17

.41

.46

.41

.29

.18

.19

.28

.22

.24

.19

.20

.72

1.12

.44

.45

.24

.23

3.50

.3fl

.26

.19

1.17

.47

.30

.54

.21

.19

.26

.37

9.33

.37

.39

.61

.23
418 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

CHELAN RIVER BASIN 

Stehekln River at Stehekin, Wash. Continued

Year

1933

1934

1934

1935

1936

1937

1937

1938

1939

1940

1940

1941

1942

Month

Oct.

Nov.

Mar.

Apr.

May

June

July

Nov.

Jan.

May

June

July

Apr.

May

June

May

June

Oct.

Apr.

May

June

July

May

June

July

May

June

Oct.

Apr.

May

June

May

June

July

Day

25

27

Z

22

30

8

14

24

5

15

29

11

6

16

5

26

6

15

22

31

8

22

28

14

19

4

14

31

2

7

16

23

4

25

3

7

16

21

28

28

18

1

24

7

24

8

3

16

29

13

22

29

11

10

23

31

12

19

25

19

2

1

12

24

12

25

6

15

1

Gage 

height 

<f<*t)

23.29

23.72

22.82

23.86

23.09

23.04

23.56

26.02

23.46

24.14

25.14

24.17

22.64

22.63

22.85

24.65

22.63

22.89

24.48

24.36

24.90

23.45

23.28

23.74

23.57

23.41

24.48

25.84

27.18

23.42

23.18

23.00

22.78

23.94

25.56

24.64

24.70

24.43

24.46

24.56

23.72

23.31

25.39

25.01

25.56

22.57

22.56

24.48

25.60

22.62

22.58

23.80

23.45

24.27

25.09

23.81

23.64

22.80

22.48

22.97

22.69

22.83

22.92

22.82

22.92

25.27

23.46

23.43

23.41

Discharge 

(temnd-feet)

4,510

5,190

3,710

5,560

4,110

4,020

5,010

10,000

4,840

5, -950

8,050

6,150

3,470

3,470

3,790

6,990

3,470

3,870

6,780

6,570

7,620

4,670

4,510

5,190

5,130

4,770

6,850

9,590

12,900

4,770

4,430

4,100

3,880

5,690

9,150

7,050

7,250

6,650

6,850

7,050

5,340

4,680

8,720

7,880

9,150

3,480

3,480

6,850

9,150

3,560

3,560

5,510

3,320

6,450

7,990

5,560

5,220

3,890

3,420

4,210

3,730

3,890

4,050

3,890

4,050

8,370

4,890

4,720

4,720

Annual floods

Older

(M)

8

18

2

9

10

11

15

26

13

Recurrence 

interval 

(yean)

3.50

1.56

11.0

3.11

2.80

2.55

1,87

1.08

2.15

Partial 

duration series

Order

(M)

113

88

154

77

126

133

91

9

96

65

20

57

166

167

149

35

168

143

43

47

26

107

114

89

90

100

40

11

2

99

116

127

142

73

13

33

31

44

41

34

82

105

16

23

14

164

165

42

15

160

161

79

175

49

21

78

86

139

170

122

152

140

129

141

130.

18

94

102

103

Recurrence 

interval 

(yean)

0.25

.36

.18

.36

.22

.21

.31

3.11

.29

.43

1.40

.49

.17

.17

.19

.80

.17

.30

.65

.60

1.08

.26

.25

.32

.31

.28

.70

2.55

14.0

.28

.24

.22

.20

.38

.22

.85

.90

.64

.68

.82

.34

.27

1.75

1.22

2.00

.17

.17

.67

1.87

.18

.17

.35

.16

.57

1.33

.36

.33

.20

.16

.23

.18

.20

.22

.20

.22

1.56

.30

.27

.27
MAGNITUDE AMD FREQUENCY OF FLOODS

CHELAN RIVER BASIN 

Stehekln River at Stehekin, Wash. Continued

Year

1943

1944

1945

1945

_1946

1946

1947

1948

Month

Apr.

May

June

July

May

June

May

June"

July

Oct.

Apr.

May

June

July

Oct.

Apr.

May

June

May

June

Day

16

26

9

17

30

7

23

15

29

11

16

6

31

20

25

10

26

26

9

27

3

14

20

2

11

20

25

28

8

28

18

25

29

7

29

height </«*;

23.30

25.17

24.84

24.45

24.80

23.96

23.30

23.66

23.23

23.12

22.56

23.48

25.36

24.00

23.30

22.70

23.69

22.46

24.65

24.84

24.10

24.02

24.47

22.93

22.68

22.84

24.16

22.86

25.00

24.70

23.03

22.85

29.00

26.25

22.88

Period 1911-15, 1927-48

Discharge

(Ktond-feet)

4,550

8,160

7,330

6,540

7,330

5,780

4,550

5,420

4,720

4,550

3,600

4,890

8,590

5,780

4,550

3,600

5,240

3,360

7,110

7,530

6,130

5,940

6,910

4,050

3,730

3,970

6,320

3,970

7,960

7,320

4,210

3,970

18,600

10,900

4,320

Annual floods

Order

(M)

14

24

12

19

16

1

Recurrence 

interval

(yean)

2.00

1.17

2.33

1.47

1.75

28.0

Partial 

duration series

Order

(M)

109

19

28

Afl *o

29

70

110

81

104

111

157

95

17

71

112

158

84

172

32

27

58

66

36

131

153

134

53

135

22

30

123

136

1

7

121

Recurrence 

interval

(yean)

0.26

}.48

1.00

.58

.97

.40

- .25

.35

.27

.25

.18

.29

1.65

.39

.25

.18

.33

.16

.87

1.04

.48

.42

.78

.21

.18

.21

.53

.21

1.27

.93

.23

.21

28.0

4.00

.23

8 , 603 Mean annual

Railroad Creek at Lucerne, Wash.

Location.- Lat. 48°11'40", long. 120°35'50", half a mile upstream from mouth and half a 

mile southwest of Lucerne. Prior to July 1, 1913, at site Just upstream from mouth.

Drainage area.- 64 square miles.

Records available.- December 1910 to June 1913, January 1927 to September 1948.

GageT-Non-recording gage read once daily December 1910 to June 1913, July to September 1948. Recording gage January 1927 to May 1948.

Stage-discharge relation.- Defined by current-meter measurements below 1,350 secondfeet, and by slope-area measurement of peak discharge.

Maximum flood of record.- 3,880 second-feet May 28, 1948.

Remarks.- No diversion or regulation. Gage heights for period when non-recording gage 

was used are from graphs based on gage readings. Stage-discharge relation subject to 

frequent shifts.

Year

1911

1912

1927

1928

Month

June

May

June

May

June

May

June

Day

4

13

20

12

25

17

8

22

22

26

13

24

height

(feet)

2.7

3.0

3.0

2.8

2.82

4.64

5.32

4.52

5.10

4.66

4.00

4.20

Discharge 

<iecond-feet)

760

900

900

806

806

824

1,910

1,040

1,860

1,360

696

885

Annual floods

Order

(M)

19

20

2

3

Recurrence 

interval

(yean)

1.32

1.25

12.5

8.33

Partial 

duration series

Order

(M)

68

42

43

60

61

58

1

31

2

10

77

47

Recurrence 

interval

(yean)

0.35

.57

.56

.40

.39

.41

24.0

.77

12.0

2.40

.31

.51
FLOODS OF MAY-JUNE.1948 IN COLUMBIA RIVHl BASIN 

Railroad Creek at Lucerne, Wash.

40 

36 

32

28 

24 

20 

16 

12

8

t

fe! 4 

Q

I 0

LJ

trt

U. 

O

- »

j

V

j> *s'

" 

«

^

S

** "

S *""

~/

/

/

/»

/

11-1 2,. 1 9

> '- 18

H,np 9 « co * m o ni o o o o S S 2

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

z

0 40

o:

<

0 36

CO 

Q

32 

28 

24 

20 

16 

12 

8 

4 

0

«<^

**

Mrf

Ml

,"

f*

.. J

^

s~

1£

^'

911-12, IS

,/" 

27-4

 

7

OOQO

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 622 SECOND-FEET
MAGNITUDE AND FREQUENCY OF FLOODS 421

CHELAN RIVER BASIN 

Railroad Creek at Lucerne, Waah. Continued

Year

1929

1930

1931

1932

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

Month

May

June

May

June

May

June

Feb.

May

June

Nov.

May

June

July

Apr.

May

June

Jan.

May

June

July

May

June

May

June

May

June

May

June

May

June

June

May

June

July

May

June

July

May

June

Day

24

9

15

16

10

. 2

14

1

9

16

26

27

13

14

23

17

30

4

15

2

8

16

25

15

24

5

16

30

9

25

22

31

8

22

28

16

14

3

8

26

3

10

17

21

29

29

8

14

23

16

29

30

11

23

31

13

13

25

6

2

26

9

17

2

7

15

11

Gage 

height

(feet)

4.30

4.34

4.23

4.07

4.18

4.12

4.38

4.34

4.35

4.23

4.19

4.46

4.16

4.54

4.45

4.76

4.19

4.46

4.95

4.42

4.38

4.45

4.01

4.00

4.75

3.97

4.15

4.57

4.27

5.20

4.16

4.22

4.45

4.06

4.15

4.86

4.07

4.13

4.60

4.53

4.59

4.54

4.47

4.44

4.50

4.11

4.82

4.06

4.34

4.04

3.98

4.43

4.18

4.18

3.87

4.68

4.01

4.18

4.45

4.32

4.39

4.45

4.19

4.06

3.96

Discharge 

(tecmd-feet)

981

876

777

636

674

626

843

779

788

690

658

884

636

956

884

1,170

716

970

1,460

932

896

961

624

730

1,580

700

885

1,360

1,020

kl,150

896

962

1,220

k660

k670

788

900

1,670

729

710

1,250

1,170

1,380

1,310

1,220

1,160

1,240

771

1,700

859

1,200

793

640

1,250

862

' 862

622

1,620

646

836

1,130

951

1,050

1,180

848

698

666

Annual floods

Order

(M)

17

23

21

18

9

7

12

5

10

4

13

11

24

6

16

22

Recurrence 

interval 

(yean)

1.47

1.09

1.19

1.39

2.78

3.57

2.08

5.00

2.50

6.25

1.92

2.27

1.04

4.17

1.56

1.14

Partial 

duration aeries

Order

(M)

34

51

66

87

79

89

56

65

63

78

83

49

88

39

50

22

73

35

8

41

45

38

90

71

6

75

48

11

33

25

46

37

16

82

80

64

44

4

72

74

13

23

9

12

17

24

15

67

3

54

18

62

OCOO

14

52

53

91

5

84 

57

2g

40

30

21

55

76

81

Recurrence 

interval 

<veon>

0.71

.47

.36

.28

.30

.27

.43

.37

.38

.31

.29

.49

.27

.62

.48

1.09

.33

.68

3.00

.58

.53

.63

.27

.34

4.00

.32

.50

2.18

.73

.96

.52

.65

1.50

.29

.30

.38

.55

6.00

.33

.32

1.85

1.04

2.67

2.00

1.41

1.00

1.60

.36

8.00

.44

1.33

.39

.28

1.71

.46

.45

.26

4,80

.29

.42

.86

.60

.80

1.14

.44

.32

.30
FLOODS OF MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

CHELAN RIVER BASIN 

Railroad Creek at Lucerne, Wash. Continued

Year

1945

1946

1947

1948i'

Month

May

June

May

June

May

June

May

Day

31

20

26

10

28

3

14

21

8

27

9

18

28

Gage 

height

4.61

4.25

3.91

4.15

4.46

4.34

4.28

4.43

4.51

4.33

4.00

3.99

8.1

Period 1911-12, 1927-48

Discharge 

(uamd-feet)

1,530

1,080

640

815

1,190

1,040

966

1,150

1,200

1,140

750

740

3,880

Annual floods

Order

(M)

8

15

14

1

Recurrence 

interval

(Vtan)

3.12

1.67

1.79

25.0

Partial 

duration aeries

Order

(M)

7

29

86

59

20

32

36

26

19

27

69

70

-

Rocurro&oe 

interval

from)

3.43

.83

.28

.41

1.20

.75

.67

.92

1.26

.89

.35

.34

-

1,350 Mean annual

f Incomplete year, 

k Estimated.

WENATCHEE RIVER BASIN

Wenatchee River at Plain, Wash. 

(Formerly called. Wenatchee River near Leavenworth)

Location.- Lat. 47°45'50", long. 120°39'30", at Plain, a quarter of a mile downstream

 from Beaver Creek, 7£ miles downstream from Nason Creek, and 12 miles north of 

Leavenworth. Prior to Jan. 8, 1932, at site 1 mile downstream from Beaver Creek.

Drainage area.- 591 square miles.

Records "available. - November 1910 to September 1948 (1923, 1926 partly estimated), 

including estimated monthly discharge for period October 1929 to July 1931.

Gage.- Non-recording gage read once daily prior to Jan. 8, 1932, recording gage thereafter. Datum of recording gage is 1,805 feet above mean sea level (from river-profile 

map).

Stage-discharge relation.- Defined by current-meter measurements below 18,900 secondfeet.

Maximum flood of record.- 22,700 second-feet May 29, 1948.

Remarks7-::~W'enatchee Park Land & Irrigation Co. diverts a maximum of about 12 second-

 feet"from Chlwawa River during irrigation seasons. Natural regulation by Wenatchee 

Lake. Gage heights for period wh.en non-recording gage was used are from graphs 

based on gage readings. Stage-discharge relation shift&d frequently at former site.

Year

1911

1912

1913

1914

1915

 1916

Month

May

June

May

June

May

June

July

Apr.

May

June

July

Apr.

May.

June

July

Day

4

2

14

27

15

21

9

20

27

10

4

20

7

22

20

3

16

3

17

3

5

20

5

20

28

18

27

3

10

Gage 

height 

(feet)

6.1

7.8

8.2

6.0

8.02

8.62

7.72

7.58

7.27

7.67

9.65

7.90

6.97

6.65

6.79

7.27

7.66

7.30

6.96

6.09

6.56

6.10

8.00

6.88

7.00

10.27

8.42

7.67

7.82

Discharge

(»econd-feet)

5,330

9,300

10,400

4,900

9,840

11,500

9,030

8,760

7,970

7,600

14,300

9,570

7,200

6,230

5,700

.6,720

8,840

7,760

7,000

4,900

6,020

4,900

9,680

6,750

7,000

16,700

10,800

8,840

9,120

Annual floods

Order

(M)

23

15

6

28

34

4

Recurrence 

interval 

<V**n)

1.61

2.46

6.17

1.32

1.09

9.25

Partial 

duration series

Order

(M)

140

50

32

150

41

19

56

64

77

87

7

46

91

114

128

103

61

85

97

151

117

152

43

102

98

4

28

62

54

Recurrence 

interval 

(year*)

0.25

.70

1.09

.23

.85

1.84

.62

.55

.45

.40

5.00

.76

.38

.31

.27

.34

.57

.41

.36

.23

.30

.23

.81

.34

.36

8.75

1.25

.56

.65
MAGNITUDE AND FREQUENCY OP FLOODS 423 

Wenatchee River at Plain, Wash., 1911-29, 1932-48 ' ,

15

t

UJ

o 

0

UJCrt

t n

/

A-*

/ J

,<-« -V

M-^r~"^

^

s~ - S

/

J

/

/

^

c/> ^ r~\ i-« i-H .-I

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

25

15 

10 

5

0 ,

 £-

s

*

* m* r

/ ^*

^

 *- ^--

X

x

^

X

^

-i cMro^m o cvim^m o o o o o

RECURRENCE INTERVAL. IN YEARS. FOR FLOODS ABOVE 4.850 SECOND-FEET
424 FLOODS OP MAY-JOKE 1948 IN COLUMBIA RIVER BASIN

WEHATCHEE RIVER BASIN 

Wenatchee River at Plain, Wash. Continued

Year

1917

1917

1918

1918

1919

1920

1920

1921

1921

1922

1923

1924

1924

1925

1926

1927

1927

1928

1929

1932

1932

1933

Month

May

June

July

Dec.

May

June

Dec.

May

June

July

May

June

July

Oct.

Feb.

May

June

Dec.

May

June

June

Feb.

May

June

Dec.

Apr.

May

June

Apr.

Oct.

Apr.

May

June

Dec.

Jan.

May

June

May

June

Feb.

May

June

Nov.

Dec.

Apr.

June

July

Day

14

30

9

17

4

19

30

5

15

31

14

14

1

28

6

22

5

15

18

16

1

6

12

19

7

25

13

18

4

10

12

15

3

14

13

20

21

29

17

27

17

9

22

3

13

23

12

26

24

9

28

14

15

23

13

18

3

29

6

16

16

Gage 

height 

(f«st)

6.85

8.42

7.47

8.41

7.89

7.64

11.13

7.30

6.52

6.49

8.60

6.10

6.67

8.67

7.05

7.71

7.05

6.75

6.13

6.31

6.70

6.49

6.50

8.70

9.58

7.54

11.90

9.47

8.84

8.15

8.30

8.93

6.63

7.34

7.32

9.04

7.30

6.5

5.94

6.19

7.65

9.68

7.55

6.30

6.50

9.54

6.32

6.48

7.37

6.63

8.91

7.32

8.50

7.24

7.99

7.77

6.37

6.36

7.84

9.71

7.56

Discharge r«cond-/«e;

6,710

11,000

8,490

11,000

9,570

8,760

18,700

7,970

6,000

6.000

11,500

5,110

6,470

11,800

7,200

9,030

7,200

6,710

5,110

5,550

6,470

5,770

5,770

11,800

14,300

8,490

21,100

14,000

12,100

10,400.

11,300

13,000

6,780

7,970

7,970

12,600

7,970

6,200 .

4,990

5,590

8,980

14,900

8,980

5,800

6,240

14,300

5,800

6,240

8,460

6,470

10,800

7,570

9,990

7,380

9,190

8,750

6,020

6,020

3,750

13,800

8,330

Annual floods

Order

(M)

20

3

13

32

7

2

24

11

12

33

5

8

31

21

9

Recurrence 

interval 

toon)

1.85

12.3

2.85

1.15

5.29

18.5

1.54

3.37

3.08

1.12

7.41

4.62

1.19

1.76

4.11

Partial 

duration series

Order

(M)

105

27

72

26

47

65

3

78

120

121

20

142

108

16

93

57

92

106

143

132

109

127

126

17

8

73

2

10

15

-

23

13

101

79

80

14

81

-

147

131

58

6

59

124

112

9

123

113

74

110

29

88

37

90

51

67

118

119

66

11

75

Recurrence 

interval 

(van)

0.33

1.30

.49

1.35

.74

.54

11.7

.45

.29

.29

1.75

.25

.32

2.19

.3»

.61

.38

.33

.24

.26

.32

.28

.28

2.06

4.38

.48

17.5

3.50

2.33

-

1.52

2.69

.35

.44

.44

2.50

.43

-

.24

.27

.60

5.83

.59

.28

.31

3.89

.28

.31

.47

.32

1.21

.40

.95

.39

.69

.52

.30

.29

.53

3.18

.47
MAGNITUDE AND FREQUENCY OP FLOODS 425

WENATCHEE RIVER BASIN 

Wenatohee River at Plain, Wash. Continued

Year

1933

1934

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

Oct.

Nov.

Dec.

Mar.

Apr.

May

June

Nov.

Jan.

May

June

July

Apr.

May

June

May

June

Apr.

May

June

May

June

May

June

May

May

June

Apr.

May

June

July

May

May

June

Apr.

May

June

July

Apr.

May

June

May

June

Day

25

3

13

23

31

24

16

30

12

6

27

9

23

31

8

29

16

23

5

15

3

24

4

27

3

17

30

18

1

26

8

23

16

29

13

30

11

24

31

13

1

26

7

15

16

26

10

18

2

8

16

30

7

31

21

26

27

15

21

3

20

8

28

18

29

9

Gage 

heignt 

</<*)

6.59

8.24

5.79

8.41

7.39

9.59

7.29

8.09

6.79

6.07

8.90

6.26

7.76

7.75

8.48

6.51

6.23

6.97

7.42

8.58

8.77

6.08

6.16

7.05

8.58

8.17

7.45

7.80

7.06

8.97

8.26

8.01

7.85

7.52

5.78

6.08

7.16

7.72

6.48

6.08

5.73

7.70

6.08

5.89

6.99

8.71

8.25

8.07

8.22

5.79

6.41

5.88

6.87

8.24

6.73

5.87

8.79

7.83

7.90

6.14

6.12

8.40

8.38

6.17

12.43

10.35

Period 1911-29, 1932-48

Discharge 

( aond-feet)

6,380

9,640

4,960

10,100

7,910

13,500

7,710

9,410

6,720

5,430

11,500

5,790

8,750

8,750

10,400

6,150

5,610

7,000

7,790

10,600

11,200

5,310

5,480

7,100

10,600

9,540

7,900

8,650

7,110

11,700

9,760

9,140

9,060

8,310

4,940

5,450

7,540

8,770

6,180

5,450

4,850

8,720

5,430

5,070

7,200

11,200

9,900

9,660

9,900

4,890

6,000

5,070

6,990

9,900

6,590

5,070

11,400

8,950

9,180

5,430

5,430

10,400

10,400

5,620

22,700

16,000

Annual floods

Orfer

(M)

10

16

18

22

14

27

29

36

30

19

35

26

17

25

1

R66tQT6O.C6

interval 

(»*n)

3.70

2.31

X

2.05

1.68

2.64

1.37

1.28

1.03

1.23

1.95

1.06

1.42

2.18

1.48

37.0

Partial 

duration series

Order

(M)

111

45

148

36

82

12

86

49

104

136

21

125

68

69

33

116

130

99

84

30

24

141

133

96

31

48

83

71

95

18

42

53

55

76

149

134

89

63

115

135

154

70

137

144

94

25

38

44

39

153

122

145

100

40

107

146

22

60

52

138

139

34

35

129

1

5

Rt!CUiT6B06

interval 

(veart)

0.32

.78

.24

.97

.43

2.92

.41

.71

.34

.26

1.67

.28

.51

.51

1.06

.30

.27

.35

.42

11.7

1.46

.25

.26

.36

1.13

.73

f42

.49

.37

1.94

.83

.66

.64

.46

.23

.26

.39

.56

.30

.26

.23

.50

.26

.24

.37

1.40

.92

.80

.90

.23

.29

.24

.35

.88

.33

.24

1.59

.58

.67

.25

.25

1.03

1.00

.27

35.0

7.00

11,590 Mean annual |
426 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

YAKIMA RIVER BASIN 

North Fork Ahtanum Creek near Tampico, Wash.

Location.- Lat. 46°33'40", long. 120°55'10", 100 feet downstream from Nasty Creek and 3j

miles northwest of Tampico. 

Drainage area.- 69 square miles. 

Records available.- August 1907 to September 1924 (fragmentary), March 1931 to September

1948. 

Gage.- Non-recording gage read once dally prior to Apr. 2, 1913, Intermittently Aug. 20,

1915, to Sept. 5, 1916. Recording gage after Apr. 2, 1913, except for period August

1915 to September 1916. Gage datum changed Sept. 20, 1934.

Stage-discharge relation^- Defined by current-meter measurements below 523 second-feet. 

Maximum flood of record.^ 770 second-feet May 27, 1948. 

Remarks.- No~diversian of Importance. No regulation. Stage-discharge relation shifts

frequently.

Year

1908

1911

1912

1913

1915

*

1916

1917

1918

1919

1920

1921

1932

1933

1933

1934

1935

1936

1937

Month

June

June

May

June,

Jan.

Mar.

Apr.

May

June

June

June

May

May

June

Feb.

Mar.

Apr.

May

June

Apr.

May

June

Dec.

Jan.

Mar.

Apr.

May

Nov.

Dec.

Jan.

May

Apr.

May

June

Apr.

May

June

Day

11

1

20

3

25

23

2

19

9

18

8

10

27

8

5

27

18

14

10

12

27

30

4

14

10

22

23

29

24

28

5

21

25

22

22

4

14

27

7

14

3

27

3

21

Gage 

height 

(fttt)

2.90

2.8

3.20

3.56

2.32

2.43

3.00

2.81

2.66

4.60

3.60

3.13

3.40

2.92

3.85

2.91

2.68

2.67

3.16

3.01

3.35

3.45

3.47

3.76

3.25

4.45

3.71

2.34

2.24

1.52

1.27

1.98

1.93

1.78

1.86

2.05

1.79

1.85

1.71

1.80

1.90

1.94

1.68

Discharge 

(*cond-f«t)

407

411

629

460

143

146

272

228

195

728

412

275

354

208

512

194

142

139

255

218

316

344

350

433

286

755

532

180

k250

160

182

136

282

271

237

255

298

239

252

221

241

264

273

215

Annual floods

Order

(M)

12

11

4

6

20

3

10

18

13

25

5

22

9

2

17

16

19

Recurrence 

interval 

(V«»*>

2.42

2.64

7.25

4.83

1.45

9.67

2.90

1.61

2.23

1.16

5.80

1.32

3.22

14.5

1.71

1.81

1.53

Partial 

duration series

Older

(M)

-

-

-

-

63

62

24

40

48

-

-

-

-

-

-

49

65

68

31

43

18

12

11

8

21

2

5

52

34

56

51

70

22

25

37

32

19

36

33

42

35

28

23

44

Recurrence 

interval 

(yean)

-

-

-

-

0.30

.31

.79

.47

.40

-

-

-

-

-

-

.39

.29

.28

.61

.44

1.06

1.58

1.73

2.38

.90

9.50

3.80

.37

.56

.34

.37

.27

.86

.76

.51

.59

1.00

.53

.58

.45

.54

.68

.83

.43
MAGNITUDE AND FREQUENCY OP FLOODS 

North Fork Ahtanum Creek near Tamplco, Wash.

427

8

7 

6 

5 

4 

3 

2

UJ 

UJ

O

00

u. 

o

,^

*"

~t*-.* .^

7

* «

r-^

y

<

/

SCI

/

/

3. 19

,^

11-1

 

3. IS

t

15- 21 19 32-48

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

1915, 1932-48

CNjm^-m o csit^^-m O oooo 

 ^j -« CM m ^ K

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 127 SECOND-FEET
FLOODS OP MAY-JUKE 1948 IN COLUMBIA RIVER BASIN

YAKIMA RIVER BASIN 

North Pork Ahtanum Creek near Tamplco, Wash.--Continued

Year

1938

1939

1940

1941

1942

1943

1944

1945

1946

1946

1947

1948

Month

Mar.

Apr.

May

June

May

Mar.

Apr.

May

Apr.

May

Apr.

May

Nov.

Mar.

Apr.

May

June

July

May

Feb.

May

Apr.

May

Dec.

May

June

Apr.

May

June

Day

13

18

1

15

24

7

16

29

24

23

10

1

1

12

24

12

21

9

22

23

28

19

25

9

1

15

8

4

31

19

25

26

11

8

27

8

21

27

11

16

Gage 

height 

</«*>

2.21

2.26

2.15

2.52

2.12

1.35

1.21

1.19

1.35

1.71

1.47

1.38

' 1.29

1.27

1.45

1.45

1.27

1.81

1.33

1.53

1.91

1.96

1.71

1.47

1.31

1.24

1.70

1.71

1.35

1.58

1.99

2.35

2.18

1.99

2.00

1.27

2.97

2.64

2.52

Period 1908, 1911-13, 1915-21, 1932-48

Discharge 

( econd-fttt)

k!40

356

370

340

446

331

158

131

127

158

233

173

156

139

136

178

178

141

258

153

196

298

339

261

193

127

143

227

234

157

212

323

m439

11320

m265

m267

mi 96

"1770

"1637

^578

Annual floods

Order

(M)

7

27

24

26

21

14

28

23

15

8

1

R6CUTT6BC6

interval

(vean)

4.14

1.07

1.21

1.12

J..38

2.07

1.04

1.26

1.93

3.62

29.0

Partial 

duration aeries

Order

(M)

67

10

9

13

6

15

57

72

73

58

39

55

60

69

71

53

54

66

30

61

46

20

14

29

50

74

64

41

38

59

45

16

7

17

27

26

47

1

3

4

Recurrence 

internl

(vean)

0.28

1.90

2.11

1.46

3.17

1.27

.33

.26

.26

.33

.49

.35

.32

.28

.27

.36

.35

.29

.63

.31

.41

.95

1.36

.66

.38

.26

.30

.46

.50

.32

.42

1.19

2.71

1.12

.70

..73

.40

19.0

6.33

4.75

374 Mean annual I

k Estimated.

m Provisional, subject to revision.

SNAKE RIVER BASIN 

Snake River near Clarkston, Wash.

Location.- Lat. 46°25'30", long. 117 a 10'30", 2 miles upstream from Alpowa Creek, 

7 miles downstream from Clarkston, and 134 miles upstream from mouth.

Drainage area.- 103,200 square miles.

Records available.- October 1915 to September 1922, August 1928 to September 1935 at 

site 66 miles downstream, published as Snake River at Riparia* October 1935 to 

September 1948 at present site and datum.

Sage.- Non-recording gage read once daily prior to Sept. 30, 1935, at site at Riparia. 

Recording gage at Clarkston from Sept. 8, 1935. Datum of recording gage is 670 feet 

above mean sea level (Corps of Engineers bench mark).

Stage-discharge relation.- Defined by current-meter measurements below 282,000 secondfeet .

Maximum flood of record.- 369,000 second-feet May 29, 1948.

Historical data.- Maximum stage known, 24.7 feet, Riparia site and datum, June 5, 1894, 

determined from floodmarks by U. S. Weather Bureau (discharge, 409,000 second-feet).

Remarks.- Regulation by power plant on Clearwater River above Lewiston, Idaho. Many 

diversions for irrigation in southern Idaho.
1400 

Oen 

°360

320

280

240

200

160

120

80

MAGNITUDE AMD FREQUENCY OP FLOODS 

Snake River near Clarkston, Wash.

429

440 

400 

360 

320 

280 

240 

200

160 

fc

Ul

^120 

O

8 80 

en 

u.

* ^

*-* f

J~.*'

\'

J

r*-~S

 * 

 -*

**"V

1

^

394

/

, 19

r

/

16-

X

J2

X

1 9 2 }--'8

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

1916-22 1929-48

 -« cvicotin q cgm^tin o ° ° § S

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 95,600 SECQND-FEET 

824933 O - 49 - 30
FLOODS OP MAY-JUHE 1948 IN COLUMBIA RIVER BASIN

SNAKE RIVER BASIN 

Snake River near Clarkston, Wash. Continued

Year

1894

1916

1917

1917

1918

1919

1920

1921

1922

1929

1930

1931

1932

1933

1933

1934

1934

1935

1936

1937

1938

1939

1940

1941

Month

June

Mar.

Apr.

May

June

Apr.

May

June

Dec.

Mar.

Apr.

May

June

Apr.

May

May

June

Mar.

Apr.

May

Apr.

May

June

May

June

Apr.

Apr.

May

Mar.

Apr.

May

June

Apr.

June

Dec.

Jan.

Apr.

May

Apr.

May

Apr.

May

May

Apr.

May

May

Mar.

May

Feb.

Apr.

May

May

June

Day

5

22

17-19

8

20

14

28

16

30

10

18

20

30

28

14

6

14-15

5

30

30

22

17

18

23

20

9

6

27

7

25

17

26

1

8

18

21

15

15

23

18

29

11

23

24

1

15

26

9

17

25

25

16

19

19

2

29-30

26

4

29

2

12

14

9

Gage 

height

(ftet)

24.7

12.0

10.8

14.3

16.8

10.7

12.9

18.0

18.2

16.0

17.9

10.40

14.00

10.00

10.20

13.20

16.00

10.6

11.6

13.3

11.45

12.20

11.20

11.75

19.00

9.5

11.65

15.85

16.5

12.50

10.64

9.02

10.30

9.06

9.24

10.94

11.16

15.87

16.06

12.33

11.12

17.36

13.20

9.10

9.94

9.90

10.52

9.08

9.14

11.22

31.05

32.52

23.76

31.90

29.50

32.44

23.44

26.89

22.36

24.48

24.71

22.90

22.70

Discharge

(second-feet)

409,000

144,000

124,000

185,000

230,000

122,000

160,000

252,000

256,000

216,000

250,000

117,000

180,000

111,000

114,000

166,000

216,000

120,000

138,000

167,000

134,000

148,000

131,000

141,000

270,000

104,003

138,000

219,000

233,000

155,000

121,000

95,600

116,000

97,200

98,800

123,000

128,000

215,000

219,000

147,000

128,000

245,000

164,000

96,090

109,000

109,000

118,000

96,000

96,000

130,000

199,000

219,000

114,000

212,000

180,000

219,000

110,000

149,000

102,000

124,000

126,000

102,000

100,000

Annual floods

Older

(M)

1

7

3

11

14

20

2

6

17

27

23

8

4

15

21

9

24

10

18

22

26

Recurrence 

interval

(vtan>

56.0

4.00

9.33

2.54

2.00

1.40

14.0

4.67

1.65

1.04

1.22

3.50

7.00

1.87

1.33

3.11

1.17

2.80

1.56

1.27

1.08

Partial 

duration series

Order

(M)

-

43

56

23

10

59

33

5

4

15

6

63

24

67

65

29

16

61

47

28

49

39

50

45

3

73

48

11

9

34

60

82

64

78

77

58

53

17

12

40

54

7

30

79

70

71

62

80

81

51

21

13

66

18

25

14

68

36

74

57

55

75

76

Recurrence 

interval

(Heart)

-

0.65

.50

1.22

2.80

.47

.85

5.60

7.00

1.87

4.67

.44

1.17

.42

.43

.96

1.75

.46

.60

1.00

.57

.72

.56

.62

9.33

.39

.58

2.54

3.11

.82

.47

.34

.44

.36

.36

.48

.53

1.65

2.33

.70

.52

4.00

.93

.35

.40

.39

.45

.35

.35

.55

1.33

2.15

.42

1.56

1.12

2.00

.41

.78

.38

.49

.51

.37

.37
MAGNITUDE AND FREQUENCY OP FLOODS

SNAKE RIVER BASIN 

Snake River near Clarkston, Wash. Continued

Year

1942

1943

1944

1945

1946

1946

1947

1948

Month

Apr.

May

Apr.

June

May

May

June

Mar.

Apr.

May

June

Dec.

May

June

Jan.

Apr.

May

Day

15

23

27

20

1

22

16

7

7

31

20

9

2

15

10

10

8

23

9

22

29

Gage 

height 

(f«*>

26.36

25.65

28.27

31.69

31.47

30.80

23.42

26.91

26.87

22.02

28.56

28.15

26.30

28.23

33.22

26.27

22.68

26.27

27.13

37.38

40.36

Period 1894, 1916-22, 1929-48

Discharge

(xxondjtet)

139,000

130,000

162,000

209,000

206,000

197,000

110,000

149,000

149,000

95,600

169,000

164,000

142,000

169,000

239,000

146,000

106,000

146,000

155,000

310,000

369,000

Annual floods

Older

(M)

16

12

25

19

13

5

1

Recurrence 

interval

(year*)

1.75

2.33

1.12

1.47

2.16

5.60

28.0

Partial 

duration series

Onler

(M)

46

52

32

19

20

22

69

37

38

83

26

31

44

27

S

41

72

42

35

2

1

Recurrence 

interval

(yean)

0.61

.54

.87

1.47

1.40

1.27

.41

.76

.74

.34

1.08

.90

.64

1.04

3.50

.68

.39

.67

.80

14.0

28.0

192, 500 Mean annual

South Pork Boise River near Lenox, Idaho

Location.- Lat. 43°30', long. 115°41', l£ miles upstream from Smith Creek, 4.miles upstream from flow line of Arrowrock Reservoir, 4 miles west of discontinued Lenox post 

office, 13 miles upstream from mouth, and 17 miles upstream from Arrowrock Dam.

Drainage area.- 1,090 square miles.

Records available.- March 1911 to December 1947.

Gage.- Non-recording gage read once daily prior to Apr. 10, 1915, recording gage thereafter.

Sta

Bax____________ Remarks.- Data for 1916-18 are daily mean flows except for annual maxima which are momentary peaks. Some 'water stored in Little Camas Reservoir and diverted for irrigation 

of about 5,000 acres of land in vicinity of Mountain Home. Storage began at Anderson 

Ranch Dam Dec. 15, 1945; no peaks listed thereafter because of regulation.

.ge-dlscharge relation.- Defined by current-meter measurements, 

imum flood of record'.- 9,550 second-feet Apr. 17, 1943.

Year

1911

1912

1913

1914

1915

1916

Month

Apr.

May

June

Apr.

May

June

Apr.

May

Apr.

May

June

May

Apr.

May

June

Day

3

28

6

16

13

10,11

30

20

8-10

15

21

27

10

28-30

16

4

23

20

19

12

27

7

21,22

10

19

28

Gage 

height

(feet)

5.5

6.6

7.7

7.3

8.4

5.6

5.6

7.8

7.6

6.1

5.9

6.0

6.8

7.7

7.4

7.1

7.9

5.4

5.2

6.8

8.0

8.68

6.5

7.2

7.8

6.5

Discharge 

( econd-feet)

2,530

3,790

5,480

4,960

6,420

2,920

2,920

5,800

5,520

3,290

3,040

3,160

4,210

5,440

4,880

4,360

5,450

2,300

2,100

4,150

6,240

7,530

3,690

4,810

5,880

3,690

Annual floods

Older

(M)

11

12

16

15

33

8

Recurrence 

interval 

(year*)

3.27

3.00

2.25

2.40

1.09

4.50

Partial 

duration series

Order

(M)

122

72

39

48

23

104

105

30

37

84

91

36

58

41

49

56

40

131

139

62

26

9

75

51

28

76

Recurrence 

interval 

(yean)

0.30

.50

.92

.75

1.57

.35

.34

1.20

.97

.43

.40

.42

.62

.88

.74

.64

.90

.27

.26

.58

1.38

4.00

.48

.71

1.29

.47
432 FLOODS OP MAY-J0NE 1948 IN COLUMBIA RIVER BASIN 

South Fork Boise River near Lenox, Idaho, 1911-45

DISCHARGE. OF SECOND-FEET IN THOUSANDS 

O*-MOJ*U101-JCO«>O (OO O>-MO)*01<J>-.J 00

y

y

^

r'

,

K-

^

^r

;-

J

-* '

m ^

S

 *-~-~-' ~-»

3 p ^H BI ~H ~* <sj ro ^ u? o uft c

RECURRENCE INTERVAL. IN YEARS. FOR ANNUAL FLOODS

/

/

-^

J

,^-

X"

,.x

f°* h(x

~*

j

f j

^ - ._ * 

s

 -

^ *

H w < » .* «n q 01 m « in 2 S22S

RECURRENCE INTERVAL.IN YEARS. FOR FLOODS ABOVE 2.070 SECOND-FEET
MAGMITDDE AND FREQUENCY OP FLOODS 433

SNAKE RIVER BASIN 

South Fork Boise River near Lenox, Idaho Continued

Year

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

Month

Apr.

May

June

Apr.

May

June

Apr.

May

May

June

Apr.

May

June

Apr.

May

June

Apr.

May

June

July

May

Mar.

Apr.

May

June

Apr.

May

May

June

Mar.

May

May

June

Apr.

May

June

May

Apr.

May

June

Day

26

15

24,

29-30

10

18

1

13

25

5

13

4

25

29

17

8

4

13

23

17

27

12

24

28

6

20

26

6

14

13

17

30

10

26

12

22

1

13

30

12

8

21

22

30

19

5

1

17

8

25

11

26

25

16

13

254'

30

12

7

16

15

14

22

16

Gage 

height 

(fa*)

6.1

9.53

7.8

8.2

8.3

5.45

5.55

5.75

6.7

7.33

5.88

7.18

7.56

6.42

5.68

5.92

6.06

6.40

9.44

8.93

9.18

6.80

6.72

7.85

8.85

9.05

8.57

8.35

5.32

5.83

5.37

6.81

7.42

6.94

5.52

5.69

5.19

£.38

7.54

7.81

8.25

6.64

5.99

5.57

6.04

8.14

10.1

8.90

5.33

8.71

8.08

6.48

5.85

5.34

5.70

5,23

6.33

5.92

5.16

5.16

5.92

7.69

7.63

7.10

Discharge

fMOMMMwO

3,140

9,200

5,880

6,620

6,810

2,370

2,480

2,700

3,990

5,040

2,880

4,810

5,520

3,640

2,700

2,940

3,120

3,610

9,020

7,060

7,060

3,680

3,760

5,410

6,680

7,060

6,120

6,310

2,200

2,820

2,260

4,100

5,080

4,260

2,420

2,640

2,150

2,310

5,260

5,800

6,660

3,800

3,000

2,420

3,040

5,530

8,440

6,650

2,220

7,570

6,370

3,660

2,780

2,220

2,600

2,120

3,440

2,840

2,100

2,100

2,940

5,730

5,550

4,680

Annual floods

Older

(M)

2

19

14

26

3

9

18

32

10

31

5

7

25

27

34

13

R0CUIV6H06

interval 

ftcwl

18.0

1.90

2.57

1.38

12.0

4.00

2.00

1.12

3.60

1.16

7.20

5.14

1.44

1.33

1.06

2.77

Partial 

duration series

Order

(M)

87

2

29

21

17

128

123

113

66

46

106

52

38

79

114

96

88

80

3

13

12

77

73

42

18

14

27

25

136

109

133

63

45

57

125

118

137

130

43

31

19

71

94

126

92

36

5

20

134

8

24

78

112

135

119

138

81

108

140

141

97

32

34

53

Recurrence 

interval 

<V»ont

0.41

18.0

1.24

1.72

2.12

.28

.29

.32

.55

.78

.34

.69

.95

.46

.32

.38

.41

.45

12.0

2.77

3.00

.47

.49

.86

2.00

2.57

1.33

1.44

.26

.33

.27

.57

.80

.63

.29

.30

.26

.28

.83

1.16

1.90

.51

.38

.29

.39

1.00

7.20

1.80

.27

4.50

1.50

.46

.32

.27

.30

.26

.44

.33

.26

.26

.37

1.13

1.06

.68
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

SNAKE RIVER BASIN 

South Pork Boise River near Lenox, Idaho Continued

Year

1933

1934

1935

1936

1937

1937

1938

1939

1940

1941

1942

1943

1944

1945

Month

Apr.

June

Mar.

Apr.

May

Apr.

May

June

Apr.

May

Dec.

May

June

Apr.

May

Mar.

Apr.

May

May

June

Apr.

May

June

Apr.

May

June

May

June

Apr.

May

June

Day

29

3

14-16

29

16

21

7

24

24

5

15

1

7

16

27

6

12

1

17

28

30

4

22

5

27

1

15

20

27

4

13

4

13

27

8

14

22

26

8

8, 9

17

5

31

13

19

1

7

15

31

9

22

6

3

23

Gage

height 

(feet)

6.53

7.41

7.19

5.11

5.84

5.91

5.90

6.68

9.03

7.59

8.24

6.78

6.23

5.34

5.09

6.00

7.10

9.31

8.22

8.93

5.88

5.87

5.57

6.13

5.83

5.94

5.81

5.93

5.92

5.58

6.84

5.75

6.65

6.57

5.61

6.68

6.60

7.00

6.72

8.52

10.05

8.70

8.82

7.42

7.76

5.08

5.48

6.08

5.37

5.31

5.62

6.52

5.89

5.74

Period 1911-45

Discharge

( ecmdjeet)

3,730

5,190

4,850

2,070

2,940

3,060

3,000

4,190

8,400

5,550

6,860

4,190

3,380

2,270

2,070

3,060

4,680

8,600

6,480

7,810

2,820

2,940

2,590

3>320

2,940

2,940

2,820

2,940

2,940

2,590

4,190

2,700

3,880

3,880

2,700

4,030

3,880

4,510

4,030

6,850

9,550

7,190

7,370

5,040

5,680

2,070

2,480

3,180

2,380

2,320

2,690

3,880

3,040

2,860

Annual floods

Order

(M)

17

35

21

6

30

4

28

22

23

20

1

29

24

EU9CIUTODC6

interval 

(van)

2.12

1.03

1.72

6.00

1.20

9.00

1.29

1.64

1.57

1.80

36.0

1.24

1.50

Partial 

duration series

Order

(M)

74

44

50

142

98

89

95

59

6

35

15

60

82

132

143

90

54

4

22

7

110

99

120

83

103

100

111

101

102

121

61

115

67

68

116

65

69

55

64

16

1

11

10

47

33

144

124

85

127

129

117

70

93

107

5,260 Mean annual

R0CUfl'6DC6

interval 

fron)

0.49

.82

.72

.25

.37

.40

.38

.61

6.00

1.03

2.40

.60

.44

.27

.25

.40

.67

9.00

1.64

5.14

.33

.36

.30

.43

.35

.36

.32

.36

.35

.30

.59

.31

.54

.53

.31

.55

.52

.65

.56

2.25

36.0

3.27

3.60

.77

1.09

.25

.29

.42

.28

.28

.31

.51

.39

.34
MAGNITUDE AMD FREQUENCY OP FLOODS 435

SNAKE RIVER BASIN 

Malheur River near Drewsey, Oreg.

Location.- Lat. 43°47', long. 11B°20', 300 feet downstream from crossing of Burns-Ontario 

highway, half a mile downstream from Cottonwood Creek, and 3 miles southeast of 

Drewsey.

Drainage area.- 982 square miles.

Records available.- June 1939 to September 1948. June 1928 to June 1939 at site 7 miles 

downstream (1931, 1934, 1937 fragmentary).

Sage.- Recording. Datum of gage is 3,479.29 feet above mean sea level, datum of 1929.

j|tage-dlscharge relation.- Defined by current-meter measurements below 2,500 second-feet.

Maximum flood of record.- 4,290 second-feet Feb. 27, 1940. .

Remarks.- No~regulation. Flood flow not materially affected by diversions above station.

Year

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1937

1938

1939

1940

1940

1941

Month

Feb.

Mar.

Apr.

June

Mar.

Mar.

Feb.

Mar.

Mar.

Apr.

Apr.

Jan.

Apr.

Feb.

Apr.

Apr.

Dec.

Feb.

Mar.

Apr.

Mar.

Feb.

Mar.

Dec.

Jan.

Feb.

Mar.

Apr.

Day

21

14

3 

29

9

6

12

27

6

8

13

19

19

25

15 

27

4 

29

12

24

9 

17

22

12

20

16

12

27

2

14

17

19

28

20 

25

21

6

10

27

28

8

27

31

27

26

24

2

6

9

18

28

5 

11

Gage 

height 

(ft*)

6.46

5.20

4.63 

5.32

5.66

6.18

6.61

7.30

6.00

4.89

4.52

3.55

8.17

5.00

5.08 

5.17

4.60 

4.66

2.62

2.62

4.60 

4.77

6.72

5.27 

5.73

4.44

5.75

4.74

5.86

5.73

5.28

5.08

4.58

6.20 

6.09

4.96

6.65

6.38

11.35

11.05

6.46

9.30

10.00

6.54

6.54

7.89

10.02

7.83

8.10

8.25

7.39

8.16 

6.89

Discharge 

(Kxond-ftitt)

2,300

1,290

942

1,360

1,640

2,040

2,390

3,050

2,100 .

1,280

1,020

565

3,800

1,080

1,150 

1,180

815 

845

132

132

810 

900

2,400

1,240 

1,610

730

1,610

900

1,690

1,610

1,270

1,130

810

1,970 

1,890

1,030

1,020

915

4,290

3,930

935

3,000

3,080

978

1,020

1,670

3,100

1,640

1,780

1,870

1,420

1,820 

1,180

Annual floods

Order

(M)

10

6

11

17

21

3

19

22

18

9

20

12

16

1

5

interval 

(Van)

2.30

3.33

2.09

1.35

1.10

7.67

1.21

1.05

1.28

2.56

1.15

1.92

1.44

23.0

4.60

Partial 

duration series

Order

(M)

15

47

68 

46

37

20

14

8

19

48

63

-

4

60

56 

55

76 

74

_

-

77 

73

13

50 

38

-

39

72

32

40

49 '

58

78

22 

23

61

62

71

1

3

69

9

7

66

64

33

6

36

29

26

44

27

54

Recurrence 

interval

(M*Mf»\ lytOaV

1.53

.49

.34 

.50

.62

1.15

1.64

2.88

1.21

.48

.37

-

5.75

.38

,41 

.42

.30 

.31

,.

-

.30 

.32

1.77

.46 

.61

-

.59

.32

.72

.58

.47

.40

.29

1.05 

1.00

.38

.37

.32

23.0

7.67

.33

2.56

3.29

.35

.36

.70

3.83

.64

.79

.88

.52

.85 

.43
DISCHARGE, IN HUNDREDS OF SECOND

8 § £

.23

10

20

30 

40

50

 Xj^v

^A w

\

-Sr1 \

*^

-v

V^

^

V \

1.01 

1.05

1.10

70 

S 1.50

c 

yo

m 2

O

z 3

m 

yo 

< 4

>

r 5

z

 <

xi

W 10 

 n

39 15

> 

1 20

> 

 " 30

 n ° 

1 «

O CA

100 

150

200

^x

___

 ^.

^
MAGNITUDE AND FREQUENCY OP FLOODS 437

SNAKE RIVER BASIN 

Malheur River near Drewsey, Oreg. Continued

Year

1942

1942

1943

1944

1945

1945

1946

1947

1948

Month

Mar.

Apr.

Nov.

Jan.

Mar.

Apr.

Feb.

Mar.

Jan.

Feb.

Mar.

Apr.

Dec.

Feb.

Mar.

Apr.

Feb.

Jan.

Apr.

Day

12

2

4

13

29

1

21

9

14

28

8

16

7

10

7

8

14

23

22

28

27

6

13

21

19

13

17

7

22

Gage 

height 

<f**>

7.70

8.16

8.26

8.01

6.10

8.46

8.86

7.84

7.33

9.16

8.68

9.19

6.68

6.94

7.86

10.27

8.81

8.27

6.80

6.97

9.85

6.32

7.66

7.65

8.00

11.41

6.35

6.95

6.40

Period 1927-48

Discharge 

(ueond-fut)

1,570

1,820

1,880

1,740

830

2,000

2,250

1,640

1,380

2,460

2,140

2,480

1,090

1,200

1,650

3,260

2,180

1,880

1,140

1,220

2,960

933

1,550

1,540

1,730

4,210

945

1,200

1,010

Annual floods

Older

(M)

13

8

14

4

7

2

15

Recurrence 

intern! 

(year*)

1.77

2.88

1.64

5.75

3.29

11.5

1.53

Partial 

duration series

Order

(M)

. 41

28

25

30

75

21

16

35

45

12

18

11

59

52

34

5

17

24

57

51

10

70

42

43

31

2

67

53

65

R6CUiT8II06

intern! 

(Jtean)

0.56

.82

.92

.77

.31

1.10

1.44

.66

.51

1.92

1.28

2.09

.39

.44

.68

4.60

1.35

.96

.40

.45

2.30

.33

.55

.53

.74

11.5

.34

.43

.35

2,060 Mean annual

Salmon River beiow Yankee , near uiayton, Idaho

Location.- Lat. 44°16', long. 114°44', a quarter of a mile downstream from Yankee Fork

and 18 miles upstream from Clayton. 

Drainage area.- 841 square miles.

Records available.- October 1921 to September 1948. 

Page.- Staff gage read once or twice dally prior to Sept. 3, 1927, recording gage

thereafter.

Stage-discharge relation. - Defined by current-meter measurements below 6,200 second-feet. 

Maximum flood of record.- 8,000 second-feet (estimated) June 27, 1927. 

Remarks.- Small diversions above station for Irrigation.

Year

1922

1923

1924

1925

1926

1927

1928

Month

Hay

June

May

June

July

May

May

June

May

May

June

May

Day

26

7

15,17

26

12,13

1

17,18

29

22,23

5

17

27

13

27

10,11

26

Gage 

height 

<f**>

5.90

7.60

7.60

5.40

6.00

4.39

4.00

6.60

5.90

3.50

7.20

5.40

9.10

8.08

8.96

Discharge 

(i«md/«t>

4,810

6,760

6,760

4,260

4,920

3,220

2,820

5,620

4,810

2,360

4,820

2,770

7,260

k8,000

6,070

7,530

Annual floods

Older

(M)

6

13

23

10

26

1

2

RMQLTBDCft

intern! 

(V«ni>

4.67

2.15

1.22

2.80

1.08

28.0

14.0

Partial 

duration series

Order

(M)

25

8

9

32

23

52

57

17

26

70

24

60

3

1

14

2

Recurrence 

interval

/UM*l*k (year$/

1.12

3.50

3.11

.88

1.22

.54

.49

1.65

1.08

.40

1.17

.47

9.33

28.0

2.00

14,0
438 FLOODS OF MAY-JUHE 1948 IN COLOMBIA RIVER BASIN 

Salmon River below Yankee Fork, near Clayton, Idaho, 1922-48

8 

7 

6 

5 

4 

3

Ul 

Ul i 2

o 

<-> 1

UJ c/) 

u. 

0 0

« Q £ 

Z 

< 

(rt

O

X

z

UJ

o

10 

V)

Q

8 

7 

6 

5 

4 

3 

2 

1 

n

 * 

 * *-»

s

/

S

/

f

^

/-/ -9*

_- *

.^

^-^

3 o 2 Bl 0" «o » in -< 2 pi 8 ? 8 88c 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

7*.*

f

j

J

»

r^

r *~

^^

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 2,350 SECOND-FEET
MAGNITUDE AND FREQUENCY OP FLOODS 439

SNAKE RIVER BASIN 

Salmon River below Yankee Fork, near Clayton, Idaho Continued

Year

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1941

1942

1943

1944

1945

1946

1947

1948

Month

Maj

June

May

June

May

May

June

June

Apr.

May

June

Apr.

May

June

May

May

June

May

May

June

May «-w*dF

June

Dec.

Apr.

May

June

Apr.

May

May

June

July

May

June

May

June

Apr.

May

June

May

June

May

June

"toy

24

16

21

30

11,12

16

21

16

10

25

8

9,10

23

5

15

2

28

1

17

28

7

30

5

25

14

13

26,27

8

3

13

22

26

9

19,24

5

29

13

19

22

17

1

9

27

10

9

23

26

8

28

6

9

27

20

19

29

3

Gage 

height 

(/«*)

5.93

6.05

5.44

6.3

6.3

7.11

7.49

8.07

5.43

5.71

6.67

6.31

8.09

8.39

5.52

6.59

6.59

8.73

8.78

7.05

5.39

6.71

5.17

5.38

6.27

5.61

6.15

5.32

5.72

8.14

7.70

6.15

7.27

9.30

7.89

8.91

6.4J

5.73

5.57

5.71

5.59

5.69

5.74

6.16

6.15

6.61

7.03

7.22

8.58

8.02

6.34

7.18

9.00

9.27

Period 1922-48

Discharge 

( ecomU**)

3,330

3,440

2,720

3,760

3,760

k2,350

4,800

5,360

6,400

2,720

2,940

k4,000

3,960

3,500

6,000

6,450

2,620

3,870

3,740

6,770

6,770

4,400

2,620

3,770

2,360

2,530

3,370

2,710

3,270

2,440

2,890

5,570

4,990

3,240

4,490

7,200

5,280

6,650

3,570

2,830

2,680

2,810

2,700

2,790

2,840

3,250

3,240

3,720

4,210

4,430

6,060

5,310

3,370

4,270

6,650

7,060

Annual floods

Order

(M)

18

17

27

12

8

21

15

7

25

5

24

16

19

11

3

22

20

14

9

4

R6CUTPSDC6

interval 

fyMfw

1.56

1.65

1.04

2.33

3.50

1.33

1.87

4.00

1.12

5.60

1.17

1.75

1.48

2.55

9.33

1.27

1.40

2.00

3.11

7.00

Partial 

duration aeries

Order

(M)

47

44

61

38

39

72

27

19

13

62

53

34

35

43

16

12

67

36

40

7

6

30

66

37

71

68

45

63

48

69

54

18

22

50

28

4

21

10

42

56

65

58

64

59

55

49

51

41

33

29

15

20

46

31

11

5

Recurrence 

interval 

(V*n)

0.60

.64

.46

.74

.72

.39

1.04

1.48

2.15

.45

.53

.82

.80

.65

1.75

2.33

.42

.78

.70

4.00

4.67

.93

.42

.76

.39

.41

.62

.44

.58

.41

.52

1.56

1.27

.56

1.00

7.00

1.33

2.80

.67

.50

.43

.48

.44

.47

.51

.57

.55

.68

.85

.96

1.87

1.40

.61

.90

2.55

5.60

4,750 Mean annual

k Estimated.
440 FLOODS OF MAY-JUKE 1948 IK COLUMBIA RIVER BASIN

SNAKE RIVER BASIN 

Salmon River at Whitebird, Idaho

Location.- Lat. 45°45', long. 116°20', Just upstream from Whitebird Creek, half a mile

downstream from Canfleld-Joseph highway bridge, and 1 mile southwest of Whitebird. 

Drainage area.- 13,550 square miles, Including that of Whitebird Creek. 

Records available.- August 1910 to September 1917, October 1919 to September 1948. 

Sage.- Non-recording gage read once or twice dally prior to Jan. 3, 1931, recording gage

thereafter. Datum of recording gage Is 10 feet lower than that of non-recording gage. 

Stage-discharge relation.- Defined by current-meter measurements below 90,000 seeondfeet.

Maximum flood of record.- 103,000 second-feet June 3, 1948. 

Historical data.- Maximum stage known, about 37.5 feet, 'present datum, June 1894 (dlscharge, 120,000 second-feet). 

Remarks.- Amount of water diverted above station for Irrigation Is negligible percentage

of total flow.

Year

1894

1911

1912

1913

1914

1915

1916

1917

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

Month

June

May 

June

May 

June

May

May 

June

June

Apr. 

May

June

May 

June

May 

June

May 

June

May 

June

May 

June

May

May 

June

May

May 

June

June

May 

June

May 

June

May

Day

-

17 

15

21 

9

11 

28

24

4

2

28 

7 

22 

19 

29

15 

30 

10 

18,19

23 

17

19 

9

26 

7

26 

12

17

21 

22

5

17

9

23

25 

16

22 

30 

11

17

Gage 

Mght 

(f*t)

37.5

10.6 

18.7

13.6 

18.5

12.4 

19.7

14.0 

13.0

10.6

10.05 

13.45 

10.00 

20.05 

16.00

12.9 

14.0 

14.8 

18.6

11.28 

15.09

19.13 

21.18

15.70 

18.04

14.80 

15.94

12.80

16.45 

12,50

10.80

16.39 

18.88

20.06

14.45

10.98 

12.86 

11.94

20.83

Discharge 

(iteondj«et>

120,000

33,900 

76,800

49,400 

75,600

43,100 

81,200

51,500 

46,200

33,900

30,800 

48,200 

30,800 

84,900 

62,500

45,500 

51,400 

55,700 

77,000

36,300 

56,700

75,600 

88,800

54,900 

67,200

50,300 

56,000

40,100

58,600 

, 38,700

30,600

59,000 

73,800

81,600

48,200 

46,600

31,600 

40,600 

35,800

29,700

Annual floods

Older

(M)

1

9

11

7

21

34

3

8 

19

2

16

20

29

18

35

13

6

23

28

36

Reeunence 

interval

t '..,!. .1 \jftanf

56.0 

4.11

3.36

5.29

1.76

1.09

12.3

4.62 

1.95

18.5

2.31

1.85

1.28

2,06

1.06

2.85

6.17

1.61

1.32

1.03

Partial 

duration aeries

Older

(M)

71 

10

35 

12

48 

8

32 

44

72

78 

38 

79 

4 

21

45 

33 

29 

9

62 

27

13 

3

30 

19

34 

28

55

26 

58

80

25 

15

7

39 

41

75 

54 

64

82

Reeunence 

interval 

CyMnt)

0.52 

3.70

1.06 

3.08

.77 

4.62

1.16 

.84

.51

.47 

.97 

.47 

9.25 

1.76

.82 

1.12 

1128 

4.11

.60 

1.37

2.85 

12.3

1.23 

1.95

1.09 

1.32

.67

1.42 

.64

/ .46

1.48 

2.47

5.29

.95 

.90

.49 

.68 

.58

.45
MAGNITUDE AND FREQUENCY OF FLOODS 

Salmon River at Whltebird, Idaho

441

DISCHARGE. IN THOUSANDS SECOND-FEET OF

S8688'38!S8S§ S8S8SS8S8SS

^

*J

J

(4

 *r

j

/

S~+J

ut

^- >-

94

_ 

-

^«

911-1

. ^

7,

^*

 

192C

X

-46

/

-

,

'

f

3.82 5j < < » » * 2B8838 § § § 

' RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

fs

f 

^

 £-

r"

T 

 *+ /

\

> *^

M

^

1- 

* -

7,

- tr

192O-4

#-

/

^

8

^ 

_ 

CO-<fin o o o g 

RECURRENCE INTERVAL, IN^YEARS, FOR FLOODS ABOVE 29,700 SECOND-FEET
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

SNAKE RIVER BASIN 

Salmon River at Whitebird, Idaho Continued

Year

1932

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1947

1948

Month

May

June

June

Apr.

May

June

Apr.

May

June

May

May

May

May

May

June

Apr.

May

June

Apr.

May

June

May

June

May

June

Apr.

May

May

May

June

Day

14

22

17

15

25

9

2

24

6

15

1

27

2

18

28

5

18

14

14

27

9

20

15

23

27

10

20

6

1

20

16

1

13

11

7

23

28

9

28

9

28

29

3

Gage 

height 

(ftt)

27.01

27.77

26.52

29.86

21.91

21.26

23.49

23.09

23.27

28.20

24.48

21.75

23.94

23.45

28.95

23.12

22.13

24.29

22.76

22.39

21.25

20.96

21.14

21.94

27.00

26.78

24.10

22.93

28.63

27.66

21.94

22.28

21.84

22.09

24.70

23.67

21.69

23.73

24.47

30.35

25.62

32.59

32.95

Period 1911-17, 1920-48

Discharge 

(uemut-fttt)

63,600

68,500

60,500

82,200

34,900

31,900

43,200

41,000

42,100

71,100

48,800

34,400

45,400

42,700

76,200

41,000

35,900

47,600

39,500

37,400

31,400

30,500

31,000

34,400

59,900

59,300

46,500

40,100

73,900

67,700

35,100

36,800

34,600

35,000

48,500

37,900

32,100

42,600

46,600

84,500

53,800

101,000

103,000

Annual floods

(Mer

(M)

15

5

32

26

14

33

10

27

24

30

17

12

31

22

25

4

1

Recuirence 

internl 

(Vtan)

2.47

7.40

1.16

1.42

2.64

1.12

3.70

1.37

1.54

1.23

2.18

3.08

1.19

1.68

1.48

9.25

37.0

Partial 

duration series

Order

(M)

20

17

22

6

67

74

47

52

51

16

36

69

46

49

11

53

63

40

57

60

76

81

77

70

23

24

43

56

14

18

65

61

68

66

37

59

73

50

42

5

31

2

1

Recurrence 

intern! 

(v*an)

1.85

2.18

1.68

6.17

.55

.50

.79

.71

.73

2.31

1.03

.54

.80

.75

3.36

.70

.59

.92

.65

.62

.49

.46

.48

.53

1.61

1.54

.86

.66

2.64

2.06

.57

.61

.54

.56

1.00

.63

.51

.74 '

.88

7.40

1.19

18.5

37.0

59,570 Mean annual]

Grande Ronde River at Rondowa, Oreg. 

Location.- Lat. 45°44", long. 117*47', at Rondowa, 500 feet downstream from Wallowa

Drainage area.- 2,555 square miles.

Records available.- October 1926 to September 1948 (1931 fragmentary).

Gage.- Recording. Datum of gage is 2,281.4 feet above mean sea level, datum of 1929 

(Union Pacific System track profile).

Stage-discharge relation.- Defined by current-meter measurements below 14,000 secondfeet.

Maximum flood of record.- 19,900 second-feet May 28, 1948.

Remarks.- Differences between figures shown herein and previously published peak discharges represent minor changes resulting from use of average rating curve for 

purposes of consistency for flood-frequency study and are not to be considered 

revisions, except for discharges above 10,000 aecond-feet which are revisions and 

supersede previously published figures.
MAGNITUDE AND FREQUENCY OP FLOODS 

Grande Ronde River at Rondowa, Oreg., 1927-30, 1937-48

443

??

on

18

1?

10

0.

? ?

X

5 £

-V

5

4

1

-*

f'

8 *

7

1

1 m

^

t

jr^

II

^

1

/

^

1

/

^

1 

I

'

o u

^

1 $\ s5 S\ 5\ 8 S! S

O 0^

Cft 9

Q - ^ ^

< RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

\-

z 

UJ 22 

oc. I 20

Cft 

0

18 

16 

14 

12 

10 

8 

6 

4 

2 

n

^

s

/

^

>

if <»

 r^

^S

^

S

'

'

J

/

^

1

RECURRENCE INTERVAL. IN YEARS. FOR FLOODS ABOVE 4.000 SECOND-FEET
444 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

SNAKE RIVER BASIN 

Grande Ronde River at Rondowa, Oreg. Continued

Year

1927

1927

1928

1929

1930

1932

1933

1934

1935

1936

1937

1938

1939

*

1940

1941

1942

Month

Feb.

Apr.

May

June

Nov.

Jan.

Mar.

June

Mar.

Apr.

May

June

Apr.

May

Feb.

Mar.

Apr.

May

June

Mar.

Apr.

June

Jan.

Mar.

Apr.

Apr.

May

Mar.

Apr.

May

Apr.

May

June

Mar.

Apr.

May

Mar.

May

Feb.

Mar.

May

May

June

Mar.

Apr.

May

July

Day

3

21

28

17

9

26

20

13

11

23

10

21

29

24

16

9

24

3

27

18

k24

3

k!4

14

16

24

17

4

28

5

16

23

6

31

24

16

21

23

31

3

9

19

15

15

14

27

3

16

20

19

18

1

28

25

3

30

6

28

28

12

25

3

13

8

29

12

17

10

24

2

Gage 

height 

(/«*>

4.02

5.89

5.95

6.27

6.58

5.58

4.17

6.18

7.70

5.57

6.48

4.54

4.10

5.94

6.01

3.91

4.05

4.09

4.21

9.30

6.2

6.5

7.5

7.21

4.72

4.59

3.95

4.29

5.74

6.74

7.11

4.12

4.30

4.00

4.00

5.78

4.98

4.74

4.65

4.30

4.15

7.03

6.80

4.62

4.88

5.05

4.31

4.12

4.68

4.27

5.94

5.59

6.18

6.47

5.25

4.29

4.31

4.88

4.84

4.61

 4.35

4.03

4.49

4.96

4.45

4.07

5.57

4.75

5.65

4.34

Discharge 

(teamd'f/Ht)

4,240

8,240

8,390

9,240

10,100

7,470

4,520

9,000

13,300

7,450

9,810

5,240

4,390

8,360

8,550

4,030

4,300

4,370

4,600

18,300

9,050

9,860

12,700

11,900

5,600

5,340

4,100

4,750

7,860

10,500

11,600

4,430

4,770

4,200

4,200

7,960

6,130

5,640

5,460

4,770

4,480

11,300

10,700

5,400

5,920

6,280

4,790

4,430

5,520

4,710

8,360

7,500

9,000

9,780

6,710

4,750

4,790

5,920

5,840

5,380

4,860

4,260

5,140

6,090

5,060

4,330

7,450

5,660

7,640

4,850

Annual floods

Otder

(M)

8

3

12

21

2

4

20

14

5

16

11

9

18

17

35

Recurrence 

interval 

(yean)

2.75

7.33

1.83

1.05

11.0

5.50

1.10

1.57

4.40

1.38

-

2.00

2.44

1.22

1.29

1.47

Partial 

duration series

Older

(M)-

102

32

28

18

12

41

88

22

3

42

14

69

93

29

25

109

100

95

86

2

21

13

4

5

62

68

108

82

36

10

6

91

80

104

105

35

53

69

64

81

89

7

9

66

55

49

78

92

63

84

30

40

23

15

48

83

79

56

58

67

75

101

70

54

71

98

43

59

38

76

Recurrence 

intern! 

(yean)

0.22

.69

.79

1.22

1.83

.54

.25

1.00

7.33

.52

1.57

.32

.24

.76

.88

.20

.22

.23

.26

 11.0

1.05

1.69

5.50

4.40

.35

.32

.20

.27

.61

2.20

3.67

.24

.28

.21

.21

.63

.42

.37

.34

.27 '.25

3.14

2.44

.33

.40

.45

.28

.24

.35

.26

.73

.55

.96

1.47

.46

.27

.28

.39

.38

.33

.29

.22

.31

.41

.31

.22

.51

.37

.58

.29
MAGNITUDE AND FREQUENCY 07 FLOODS 445

SNAKE RIVER BASIN 

Qrande Ronde River at Rondowa, Oreg. Continued

Year

1943

1944

1945

1945

1946

1946

1947

1948

Month

Jan.

Feb.

Mar.

Apr.

May

June

July

Mar.

May

June

May

June

Dec.

Feb.

Mar.

Apr.

May

June

July

Dec.

Feb.

Mar.

Apr.

May

June

Jan.

Feb.

Apr.

May

Day

1

22

31

16

28

19

4

10

7

15

31

10

22

5

5

22

29

28

12

29

20

26

9

28

4

22

9

12

12

23

20

8

28

9

7

21

25

22

28

Gage 

height 

(ft*}

4.18

4.06

6.47

6.67

5.74

5.79

5.43

3.99

4.02

4.41

4.39

4.13

4.08

5.84

5.52

5.04

5.90

4.10

5.62

4.33

6.12

6.24

6.23

5.97

5.31

4.23

4.08

6.83

4.40

3.98

4.74

6.32

4.65

4.87

4.99

5.00

5.44

5.98

9.76

Period 1927-30, 1932-48

Discharge

4,540

4,310

9,780

10,300

7,860

7,980

7,120

4,180

4,240

4,980

4,940

4,450

4,350

8,110

7,330

6,250

8,260

4,390

7,570

4,830

8,830

9,160

9,130

8,440

6,840

4,640

4,350

10,800

4,960

4,160

5,640

9,370

5,460

5,900

6,150

6,170

7,140

8,470

19,900

Annual floods

Onto

CM)

7

19

13

10

6

1

intern! 

(g«n)

3.14

1.16

1.69

2.20

3.67

22.0

Partial 

duration series

Order

(M)

87

99

16

11

37

34

46

106

103

72

74

90

96

33

44

50

31

94

39

77

24

19

20

27

47

85

97

8

73

107

61

17

65

57

52

51

45

26

1

RBCUIFGUM 

intervtl 

(ytan)

0.25 .22' '

1.38

2.00

.59

.65

.48

.21

.21

.31

.30

.24

.23

.67

.50

.44

.71

.23

.56

.29

.92

1.16

1.10

.81

.47

.26

.23

2.75

.30

.21

.36

1.29

.34

.39

.42

.43

.49

.85

22.0

9,440 Mean annual

k Estimated.

Clear-water River at Karaiah, Idaho

Location.- Lat. 46*14', long. 116°01', a quarter of a mile downstream from highway bridge 

at Kamlah, three-quarters of a mile downstream from Lawyer Creek, and 6 miles downstream from South Fork.

Drainage area.- 4,850 square miles.

Records available.- August 1910 to September 1948.

Qage.- Non-recording gage read once or twice dally August 1910 to July 1914, once dally 

August 1914 to Feb. 9, 1934, recording gage thereafter. Datum of gage is 1,162.52 

feet above mean sea level, datum of 1929, supplementary adjustment of 1947.

Stage-discharge relation*. - Defined by current-meter measurements.

Maximum flood of record.- 99,000 second-feet May 29, 1948.

Remarks.- Some diurnal regulation at low flow caused by power plant on South Fork.

824933 O - 49 - 31
FLOODS OP MAY-JUNE 1948 IH COLUMBIA RIVHl BASIH 

Clearwater River at Kamiah, Idaho, 1911-48

100 

90 

80 

70 

60 

50

40 

b

1? 30 

Q

§ 2° 

«/>

u. 

0

1 '

* 

/

+S

**/

it7

d

^

r

^

r'

n i

^ -t

x^

s*

/

/

/

3 g 2 55 « « * « o s og 3 g 888

 rt -i r4 - -« «

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

100

90

80

70

60

50

40

30

C\J CO * 10 O CMfO^IO O O O

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 28.200 SECOND-FEET
MAGNITUDE AMD FREQUENCY OP FLOODS 447

SHAKE RIVER BASIN 

Clearvrater River at Kamiah, Idaho Continued

Tear

1911

1912

1913

1914

1915

1916

1917

1917

1918

1919

1920

1921

1922

1923

1924

1925

1926

1927

1927

1928

1929

1930

1931

Month

May

June

May

June

Apr.

May

May

June

May

Apr.

May

June

May

June

Dec.

May

June

Apr.

May

May

June

Apr.

May

May

June,

May

June

May

Apr.

May

Apr.

May

Apr.

May

June

Nov.

May

May

June

Apr.

May

Day

6

17

4

13

21

20

21

20

27

11

26

18

23

3

19

28

7

5, 9

19

29

15

30

9

17

29,30

5

15

10

29

23

18

16

23

20

19

26

6

8-10

26

12

4

13

17

7

20

19

1

21

28

17

8

5

26

9

26

24

1

9

25

7

14,16

Gage 

height 

(fit)

10.8

10.0

11.0

. 11.5

13.6

14.4

11.3

10.0

10.2

12.4

16.1

11.9

11.8

10.2

9.8

10.1

12.2

11.1

13.7

11.1

14.7

15.4

13.8

15.4

11.3

 13.3

10.9

13.3

10.3

13.3

12.0

11.9

10.9

15.3

14.2

13.2

14.4

11.5

12.9

12.1

12.4

14.0

11.9

12.3

14.1

11.1

11.1

10.6

12.4

14.5

15.0 '

12.2

10.1

14.8

15.5

13.28

10.0

11.1

10.45

11.77

11.23

Discharge

( mmoVfeg

34,600

29,400

35,900

39,500

55,200

61,900

38,000

29,400

30,700

45,800

76,600

42,200

41,500

30,700

28,200

30,000

44,400

36,600 f

56,000

36,600

63,600

69,700

56,800

70,500

37,300

52,800

35,200

52,800

30,700

52,000

43,600

42,900

35,200

69,700

60,600

52,100

62,400

38,800

49,600

43,200

45,600

58,900

41,800

44,800

59,800

35,900

35,900

32,400

46,400

64,200

68,600

43,900

29,200

65,700

72,100

52,700

28,500

35,800

31,000

40,800

36,500

 Annual floods

Order

(M)

29

13

3

27

38

16

6

17

20

26

8

12

21

15

14

33

9

4

18

36

28

nBCUIVBDCA

interval 

(V*m)

1.35

3.00

13.0

1.44

1.03

2.44

6.50

2.29

1.95

1.50

4.88

3.25 '

1.86

2.60

2.79

1.18

4.33

9.75

, 2.17

1.08

1.39

Partial 

duration series

Order

(M)

83

110

75

58

27

20

62

111

101

40

4

53

55

102

120

104

43

69

26

70

15

10

25

8

65

28

80

29

103

33

47

52

81

11

22

32

18

60

36

49

41

24

54

42

23

76

Ti

91

37

14

12

46

113

13

5

30

117

78

100

56

72

Beenrrenee 

interval 

(yean)

0.47

.35

.52

.67

1.44

1.95

.63

.35

.39

.98

9.75

.74

.71

.38

.32

.37

.91

.57

1.50

.56

2.60

3.90

1.56

4.88

.60

1.39

.49

1.35

.38

1.18

.83

.75

.48

3.55

1.77

1.22

2.17

.65

1.08

.80

.95

1.62

.72

.93

1.70

.51

.51

.41

1.05

2.79

3.25

.85

.35

3.00

7.80

1.30

.33

.50

.39

.70

.54
448 FLOODS OP MAY-JOSE 1948 IH COLOMBIA RIVER BASIN

SNAKE RIVER BASIN 

Clearwater River at Kamlah, Idaho Continued

Year

1932

1933

1933

1934

1935

1936

1937

1938

1939

1940

1941

1942

1943

1944

1945

1946

1946

1947

1948

tff*»_4.L Month

Apr.

May

June

Apr.

June

Dec.

Mar.

Apr.

May

May

June

Apr.

May

June

May

Apr.

May

May

May

May

Apr.

May

Apr.

May

June

May

May

Apr.

May

June

Dec.

May

June

Apr.

May

June

Dav */^y

14

14

21

13-1

27

4

10

23

30

14

25

8

24

31

6

19

5

15

28

1

19

28

19

1

17

28

4

17

12

25

13

14

21

26

20

1

29

11

19

22

16

6

31

20

26

6

19

28

4

15

8

27

9

18

22

8

22

29

22

Gage v^s-Sk* ncognt <**)

10.04

15.54

14.44

11.04

11.13

15.43

16.53

12.19

10.63

11.43

12.47

10.89

12.84

11.55

10.92

13.68

13.65

15.18

11.57 «

11.41

11.61

11.30

15.31

12.39

11.32

15.03

13.30

12.02

12.06

11.04

10.86

10.87

10.92

12.10

12.88

11.05

13.95

12.08

12.90

12.51

11.78

13.19

12.44

11.72

11.77

12.19

11.25

12.12

10.98

11.80

16.07

12.33

11.42

10.97

11.47

11.64

17.84

19.22

11.31

Period 1911-48

Discharge

(Womd^wt)

28,500

72,100

62,200

35,100

35,800

71,200

81,400

43,600

32,300

37,800

45,900

34,300

44,000

34,400

29,900

50,600

49,800

63,200

34,300

32,900

34,300

32,200

63,400

39,400

31,500

60,800

46,400

36,400

37,100

29,600

28,900

28,900

28,900

37,100

43,200

29,600

52,200

37,100

43,200

40,100

34,200

44,400

38,400

33,300

33,700

36,600

30,000

36,100

28,300

33,900

69,900

37,600

31,200

29,400

32,600

33,800

86,500

99,000

29,600

Annual Hoods

Order

(M)

5

2

23

25

11

34

10

22

30

Reemrenee 

interval

frMm)

7.80

19.5

1.70

1.56

3.54

1.15

3.90

1.77

1.30

37

31

19

35

24

32

7

1

1.05 

1.26

2.05

1.11

1.63

1.22

5.57

39.0

Partial 

duration series

Order

(M)

ais

6

19

82

79

7

3

48

96

63

39

85

45

84

106

34

35

17

86

93

87

97

16

59

98

21

38

73

66

107

114

116

115

67

51

108

31

68

50

57

88

44

61

92

91

71

106

74

119

89

9

64

99

112

94

90

2

1

109

Reeumnet 

interval

ft ! « fyMtw

0.33

6.50

2.05

.48

.49

.56

13.0

.81

.41

.62

1.00

.46

.87

.46

.37

1.15

1.11

2.29

.45

.42

.45

.40

2.44

.66

.40

1.86

1.03

.53

.59

.36

.34

.34

.34

.58

.76

.36

1.26

.57

.78

.68

.44

.89

.64

.42

.43

.55

.37

.53

.33

.44

4.33

.61

.39

.35

.42

.43

19.5

39.0

.36

53,020 Mean annual
MAGNITUDE AND FREQUENCY OF FLOODS 449

UMATILLA RIVER BASIN 

Umatllla River near Umatllla, Oreg.

Location.- £,at. 45°54', long. 119*20', l£ miles downstream from West Division main canal 

or Omatllla project and 2 miles upstream from Umatllla and mouth of river.

Drainage area.- 2,290 square miles.

Records available.- October 1903 to September 1948.

Page.- Non-recording gage read once daily prior to Jan. 23, 1931, recording gage thereafter. Datum of gage is 330.57 feet above mean sea level, datum of 1929.

Stage-discharge relation.- Defined by current-meter measurements below 6,000 secondfeet.

Maximum flood of record.- 19,600 second-feet May 31, 1906.

Remarks.- Page heights for period when non-recording gage was used are from graphs based 

on gage readings. Many diversions above station for irrigation. Flow regulated by 

McKay and Cold Springs Reservoirs.

Tear

1905

1904

1905

1906

1906

1907

1908

1909

1910

Mil

1912

1913

1914

1915

1916

1917

1917

1918

1919

1919

1920

Month

Nov.

Mar.

Apr.

Mar.

Apr.

May

Dec.

Feb.

Mar.

Apr.

Mar.

Jan.

Mar.

May

Jan.

Feb.

Apr.

May

Feb.

Mar.

Apr.

May

Feb.

Mar.

Apr.

Jan.

Feb.

Mar.

May

Apr.

May

Dec.

Jan.

Mar.

Apr.

Dec.

Jan.

Apr.

D«y

22

9

30

15

28-29

1

31

22

7

26

21

11

17

17

4

21

20

15

19

5

15-14

4

18

19

31

14

9

25

2

3

23

10

16

11

21

27

9

27

14

31

29

19

26

27

5

12

21

18

27

6

14

Gage 

height 

</ *>

5.2

7.6

6.5

7.65

4.3

5.4

11.0

6.1

6.3

5.1

5.8

5.9

8.55

8.2

6.5

6.5

4.5

5.5

5.2

5.2

5.6

6.0

5.8

5.2

7.7

6.8

5.1

5.05

5.1

4.7

5.3

8.1

5.82

6.55

5.78

5.70

7.2

8.0

8.0

6.1

6.60

5.20

5.10

6.7

7.0

Discharge 

(Hcond-fe*)

3,180

9,010

6,060

9,160

1,890

3,680

19,600

5,140

5,600

3,140

4,460

4,680

11,800

10,800

6,060

6,060

2,130

3,860

3,310

3,310

4,050

4,910

4,460

3,310

9,300

6,790

3,140

3,040

3,140

2,450

3,310

10,500

4,500

6,180

4,420

4,260

7,850

10,200

10,200

5,140

7,000

3,060

4,940

3,140

5,050

3,030

6,300

3,310

3,140

6,540

7,300

Annual floods

(Ma

(M)

10

45

1

18

4

6

16

44

21

9

37

43

7

8

14

20

13.

Recurrence 

interval

f.,m mmlt \

(yMfW

4.60

1.02

46.00

2.56

11.50

7.67

2.88

1.05

2.19

5.11

1.24

1.07

6.57

5.75

3.29

2.30

3.54

Partial 

duration aeries

Order

(M)

93

12

26

11

-

69

1

36

31

95

51

45

4

6

27

28

-

66

84

85

61

42

52

86

10

19

96

107

97

-

87

7

50

24

53

57

15

8

9

37

18

104

41

98

39

108

23

88

99

22

17

Beeurrence 

intern! 

(Vtan)

0.49

3.83

1.77

4.18

-

.67

46.00

1.28

1.48

.48

.90

1.02

11.50

7.67

1.70

1.64

-

.70

.55

.54

.75

1.10

.88

.53

4.60

2.42

.48

.43

.47

-

.53

6.57

.92

1.92

.87

.81

3.07

5.75

5.11

1.24

2.56

.44

1.12

.47

1.18

.43

2.00

.52

.46

2.09

2.71
450 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Umatllla River near Umatllla, Oreg., 1903-48

20 

18 

16 

14 

12 

10 

8

b 6

Ul

I 4 

O

O 0

Ul Z

in

u.

0 o.

V> C.

1

O

Z

ui 

o 

ce

5 

18

16 

14 

12 

10 

8 

6 

4 

2 

0,

,*- *-* 

~>~

H U rt

-^

"'"

\

( /

/

r> /

r"

^ r

'^

^

/

/

/

/

^

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

 -

^

? + '

 * oi- m * 10

x

/

^

/

^

^K y

/

/

/

/

q CM«n*« o SS2S

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 3.000 SECOND-FEET
1 1ll

"3 1* »

li 9

1 Ji

10 i-a

§ el E a

| 1 ifl

o g

'. * l~

bO IP

58 5 "

id"

p li

 si

5 "D Bsl

H a

^ 

1 

in

H

1

§

!H|

*

M

1

o TP co TP en to 

to in co 01 i-ff

CM to CM CM

o 10 to oi H to

CM rt i-l T(I N O

l-l

l-l

 *

l-l

en to p- t-- to in

p- TII min co o

to <o P- 'f CD to

in in in

CO Tf rt CO t- O

to r- r- in to in

1-110 H in oi 10

IO rt rtCM

O f* iQ t* h

2*fi3 9

O i-l 

1-1 

0101

NCM 

l-l

TH i-| OI OI CO 

 * CM Lf> tO *

l-l l-l l-l l-l

NCO 01 lOO 

IO ION lOO

pCM

pi-l

O OO O O 

 * * CM UD * 

lOrtP-N i-i

in in in in 10

inino

I-IIO rtrt

to co to in

i-i in 01 10 to

CM

CM 

rtN 

CM 

Ol 01 1-1 l-l

co P-OI cy* 

in r- 1- inco

01 oco oiin 

P. to in coin

in r- CM

rt rt rt

 * to «("

tO CM CM

o o o o o 

01 inin i-i to

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IO TllTll IO-*

S

o in 

r- w t--

in inin inin

r- HOI w co

£3 .0 G .0

* ^ ^

to * in

CM CM CM

en 01 01

i-l H i-l

t-. co 

o in

10 

,-1

0

 * eo

01 H .

CM l-l

CM m CM IO

o o 

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01 *

 * IO

O CM

o 10

to in

rCM01

iQ h

£ 3

co rCM CM

01 01

H i-l

S 

i-l tO CO tO H 

n^f t~<nin

,-1

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in 100 in^c en

i-i

en

CM

CM

O OO OO O 

O^C CM o O IO 

-*CM H CM tD CM

 * in 10 * * 10

o^ o oo 

r- r-io to co i-i

in to in in in in

UD * l-l CM CM UD 

N H IO i-l i-l

^ fi h 14

ZZ x$

C^> CO

CM CM 

Ol Ol

1-1 l-l

rt O

to 

IO

o

in CM 

r- 1

 * O O

 «C rt O

rt rt JO

CM CM CM

IO ^<

o o o

O Ol O

to in o

10 w m

o o

IO CO to

in * en

CM to CM CM CM

ti fa I*

X X 3

01 O rt

CM to to 

01 en 01

rt rt rt

cn o> in to * en CM o 

Tfini-nof-tof-o

rt in rt

Tiieoo ION r-^to 

en t- TII to to to-*

IO

rt

in

to

8

0 oo o ooo 

O CM ON i-l CM CO

m 

cMioot--coininoi

Nt^-ioeoNrtr-o 

loioinNriiioiOTii

rtinoinococnto

in to coinininin

rtN 

cooit-oitooiioin

rtNN rt

O iQ (4 (4

&&x 3>

IO 

rtN 

IO 

Ol Ol

rtrt

i

 

t

O 

r

N 

r

C

I

c

O

O 

t

I

r

i

t

x 

1

t

O
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

UMATILLA RIVER BASIN 

Omatilla River near Dmatilla, Oreg. Continued

Year

1945

1946

1947

1948

Month

Nov.

Dec.

Dec.

Jan.

Jan.

Peb.

Apr.

May

lay

29

29

13

27

8

27

18

14

23

»

(ft*)

5.26

7.18

8.17

5.25

5.76

6.11

5.95

6.26

Period 1903-1948

(»<xondS«#

3,300

8,140

11,200

3,460

4,770

5,680

k4,000

5,260

6,080

Annual floods

Order

(M)

12

5

15

R6CUIF6nC6

interval 

(fan)

3.83

9.20

3.07

Partial 

duration series

Order

(M)

90

14

5

81

44

30

63

34

25

, Recurrence 

interval 

(van)

0.51

3.29

9.20

.57

1.05

1.53

.73

1.35

1.84

6,040 Mean annual

k Estimated.

JOHN DAY RIVER BASIN 

John Day River at McDonald Perry, Oreg.

Location.- Lat. 45°35', long. 120°25', at McDonald Perry, half a mile downstream from

Rock Creek and 10 miles east of Klpndike. 

Drainage area.- 7,580 square miles. 

Records available.- December 1904 to September 1948. 

aage.- Kon-recording gage read once daily prior to about 1912; twice daily to Aug. 30,

1530j recording gage thereafter. Datum of gage is 392.27 feet above mean sea level,

datum of 1929. 

Stage-discharge relation.- Defined by current-meter measurements below 21,200 secondfeet. 

Maximum flood of record.- 27,800 second-feet (revised) Peb. 6, 1907 (gage height, 10.80

feet, from hourly gage readings). 

Historical data.- Flood, probably in 1894, reached a stage of 12.8 feet (discharge,

39,100 second-feet, revised). 

Remarks.- Diversions for irrigation above station.

Year

1905

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

Month

May

Mar.

May

Peb.

Mar.

Apr.

Mar.

Apr.

Jan.

Mar.

Mar.

Jan.

Peb.

Apr.

May

Apr.

May

June

Mar.

Apr.

Apr.

Day

10

31

30

2

6

21

15

17

22

18

3

21

24

14

27

19

12

3

11

31

2

21

10

8

3

9

19

17

5

Gage 

height 

</«0

4.87

7.90

8.30

5.70

10.80

8.80

7.50

7.2

5. 75

8.5

7.95

5.8

6.5

6.1

6.0

7.85

7.6

7.90

7.92

7.1

7.73

6.85

6.5

5.68

6.12

6.15

7.04

5.25

Discharge

4,990

14,700

16,300

7,180

27,800

18,400

13,100

12,000

7,320

6,860

17,100

14,900

7,470

9,630

8,370 '

8,070

14,500

13,500

14,700

14,800

11,700

14,000

10,800

9,630

7,120

8,430

8,520

11,500

5,940

Annual floods

Order

(M)

42

10

1

21

37

8

36

15

16

24

41

Recurrence 

interval 

(yean)

1.07

4.50

45.0

2.14

1.22

5.62

1.25

3.00

2.81

1.88

1.10

Partial 

duration series

Order

(M)

-

24

13

135

1

8

40

43

134

-

11

22

130

85

103

108

28

37

25

23

49

31

62

86

138

101

100

56

-

Recurrence 

interval 

faan)

-

1.88

3.46

.33

45.0

5.62

1.12

1.05

.34

-

4.09

2.05

.35

.53

.44

.42

1.61

1.22

1.80

1.96

.92

1.45

.73

.52

.33

.45

.45

.80

-
MAGNITUDE AND FREQUENCY OF FLOODS 

John Day River at McDonald Ferry, Oreg., 1904-48

DISCHARGE. IN THOUSANDS OFSECOND-FEET 

8 SuiOotn iuic,

.'

/

s

 > 

/

/

Jr*4

>

/"+s

s

f-f

if

/

/

/

/

r

^ lf> O Q ^ CO ^- Ift O Ift O O Q O ^ S ?

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

1

tf

y"

-^^

J* it

4

)-*y

/

/

/

^

r

. ^

-! «.« *« 9 cviro^in o S99S

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 7,000 SECOND-FEET
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

JOHN DAY RIVER BASIN 

John Day River at McDonald Perry, Oreg. Continued

Year

1916

1917

1918

1919

1919

1920

1921

1921

1922

1923

1924

1925

1926.

1927

1928

1929

1930

1931

Month

Feb.

Mar.

Apr.

May

Apr.

May

June

Feb.

Mar.

Apr.

Dec.

App.

May

Jan.

Feb.

Mar.

Apr.

May

Dec.

Mar.

Apr.

May

June

Jan.

Apr.

May

Feb.

Feb.

Apr.

May

Feb.

Feb.

Apr.

May

June

Jan.

Mar.

Apr.

May

Mar.

Feb.

Apr.

Day

11

14

21

12

28

8

27

9

27

14

31

10

8

27

5

12

26

21

11

14

30

11

1

4

15

5

19

4

13

24

30

20

2

25

4

9

16

23

7

20

11

8

1

9

19

12

9

6

13

22

6

8

22

28

18

10

15

31

24

29

10

23

16

2

Gage 

height 

(feet)

9.2

7.7

8.1

7.2

6.7

6.55

6.3

8.9

9.6

9.45

7.6

6.6

6.85

6.3

8.5

6.95

6.8

8.0

6.78

7.15

6.00

6.75

6.0

6.6

8.8

7.9

7.2

6.3

6.6

6.7

7.25

7.6

6.08

6.05

7.9

8.2

6.6

8.3

7.0

8.1

6.3

6.25

5.7

6.0

6.6

6.0

6.71

8.27

6.63

6.23

5.8

5.95

6.47

7.12

5^68

7.07

7.04

5.84

6.69

6.11

6.16

5.84

4.1Q

6.84

Discharge 

(oecond-feet)

20,200

13,900

15,500

12,000

10,300

9,800

8,990

18,800

22,000

21,300

13,500

9,960

10,800

8,990

17,100

11,100

10,600

15,100

10,600

11,800

8,070

10,500

8,070

9,960

18,400

14,700

12,000

8,990

9,960

10,300

12,200

13,500

8,310

8,220

14,700

15,900

9,960

16,300

11,300

15,500

8,990

8,840

7,180

8,070

9,960

8,070

10,300

16,200

10,100

8,770

7,470

7,920

9,530

11,700

7,120

11,600

11,500

7,590

10,300

8,400

8,560-

7,590

3,320

10,800

Annual floods

Order

(M)

5

4

26

9

14

6

11

29

28

12

33

22

25

35

44

27

Recurrence 

interval 

(year*)

9.00

11.2

1.73

5.00

3.21

7.50

4.09

1.55

1.61

3.75

1.36

2.05

1.80

1.29

1.02

1.67

Partial 

duration series

Order

(M)

6

32

19

44

70

82

88

7

4

5

38

75

63

89

12

59

65

21

66

48

109

68

110

76

9

26

45

90

77

71

42

39

104

106

27

16

78

14

58

20

91

93

136

111

79

112

72

15

74

95

131

116

87

50

139

53

57

127

73

102

99

128

-

67

Recurrence 

interval 

(yean)

7.50

1.41

2.37

1.02

. .64

.55

.51

6.43

11.2

9.00

1.18

.60

.71

.51

3.75

.76

.69

2.14

.68

.94

.41

.66

.41

.59

5.00

1.73

1.00

.50

.58

.63

1.07

1.15

.43

.42

1.67

2.81

.58

3.21

.78

2.25

.49

.48

.33

.41

.57

.40

.62

3.00

.61

.47

.34

.39

.52

.90

.32

.85

.79

.35

.62

.44

.45

.35

-

.67
MAGNITUDE AND JREQtJENCY OP FLOODS 455

JOHN DAY RIVER BASIN 

John Day River at McDonald Perry, Oreg. Continued

Year

1932

1933

1933

1935

1936

1937

1937

1938

1939

1940

1941

1941

1942

1943

1944

1945

1945

1946

1947

1948

Month

Peb.

Mar.

Apr.

May

Apr.

Dec.

Apr.

Peb.

Apr.

Apr.

May

Dec.

Mar.

Apr.

Mar.

Mar.

Apr. ,

June

Dec.

Jan.

Peb.

Mar.

Apr.

May

Jan.

Peb.

Mar.

Apr.

May

Mar.

Peb.

Mar.

Apr.

May

Dec.

Mar.

Apr.

May

Apr.

Jan.

Peb.

Apr.

May

Day

29

20

26

4

15

15

5

29

28

17

23

19

3

16

5

13

3

20

20-

25

1

28

2

9

21

28

5

13

15

11

17

24

2

23

29

17

2

11

15

24

22

5

18

28

30

1

14

20

27

10

19

8

27

18

8

23

Gage 

height 

(feet)

6.24

10.60

7.16

6.83

7.07

6.58

5.92

5.97

4.37

5.90

5.89

6.58

5.90 '

7.65

6.29

5.99

5.67

5.95

7.64

7.68

7.28

7.07

6.54

5.32

5.89

7.11

5.87

6.88

6.94

5.83

5.95

5.79

7.82

6.08

8.14

7.68

7.80

5.50

5.79

5.69

5.94

6.21

6.21

5.92

8.67

6.23

6.04

6.79

6.54

5.68

5.59

8.13

6.00

7.19

7.11

9.83

Period' 1904-48

Discharge 

(Kcond-foet)

8,800

26,800

11,900

10,700

11,600

9,890

7,830

7,980

3,870

7,770

7,740

9,890

7,770

13,700

8,960

8,040

7,090

7,920

13,700

13,800

12,300

11,600

9,760

6,120

7,740

11,700

7,680

10,900

11,100

7,560

7,920

7,440

14,400

8,310

15,700

13,800

14,300

6,610

7,440

7,150

7,890

8,710

8,710

7,830

17,800

8,770

8,190

10,500

9,760

7,120

6,860

15,600

8,070

12,000

11,700

23,000

Annual floods

Older

(M)

2

32

43

34

30

18

19

17

20

40

23

13

39

31

7

38

3

H6CULT6D06

interval 

(V*m)

22.50

1.41

1.05

1.32

1.50

2.50

2.37

2.65

2.25

1.12

1.96

3.46

1.15

1.45

6.43

1.18

15.0

Partial 

duration aeries

Older

(M)

94

2

47

64

54

80

120

115

-

123

124

81

122

35

92

114

141

117

36

33

41

55

83

-

125

51

126

61

60

129

118

132

29

105

17

34

30

-

133

137

119

97

98

121

10

96

107

69

84

140

-

18

113

46

52

3

Recurrence 

interval

(yMfw

0.48

22.50

.96

.70

.83

.56

.38

.39

-

.37

.36

.56

.37

1.29

.49

.39

.32

.38

1.25

1.36

1.10

.82

.54

-

.36

.88

.36

.74

.75

.35

.38

.34

1.55

.43

2.65

1.32

1.50

-

.34

.33

.38

.46

.46

.37

4.50

.47

.42

.65

.54

.32

-

2.50

.40

.98

.87

15.0

12,600 Mean annual!
456 FLOODS OF HAY-JOKE 1948 HI COLUMBIA RIVER BASCT

DE3CHOTZS RIVER BASIN 

Deschutes River at Moody, near Blgga, Oreg.

Location.- Lat. 45*37', long. 120*54', at Moody, l£ miles upstream from mouth and 5

miles southwest of Biggs. 

Drainage area.- 10,500 square miles. 

Records available.- July 1906 to September 1948. 

Page.- Non-recording gage read once daily prior to July 19, 1930, recording gage thereafter. Datum of recording gage is 167.43 feet above mean sea level, datum of 1929. 

Stage-discharge relation.- Defined by current-meter measurements belov 19,000 secondfeet.

Maximum flood of record.- 43,600 second-feet Jan. 7, 1923. 

Remarks.- gage heights for period when non-recording gage was used are from graphs

based on gage readings. Many diversions in upper river basin for irrigation. Some

winter and spring runoff stored in Crane Prairie, Wickiup, Crescent Lake, and

Ochoco Reservoirs.

Year

1906

1907

 1907

1908

1909

1909

1910

1911

1912

1912

1913

1914

1915

1915

1916

1917

1917

1918

1919

1919

1920

Month

Nov.

Dec.

Feb.

Mar.

Apr.

Dec.

Mar.

Apr.

Jan.

Feb.

Mar.

Nov.

Dec.

Jan.

Feb.

Mar.

Jan.

Apr.

Jan.

Feb.

Apr.

Dec.

Jan.

Feb.

Apr.

Jan.

Mar.

Apr.

Feb.

Apr.

Nov.

Dec.

Jan.

Feb.

Mar.-

Apr.

May

June

Mar.

Apr.

May

Nov.

Dec.

Feb.

Mar.

Jan.

Apr.

Nov. 

Dec. 

Jan. 

Apr.

Day

15

21

6

22

9-13

27

16

19

20

18

ZO

24

13

25

26

2

19

2

14

28-29

18-19

11-13

30

26

18

14

23

17-20

17

25

4

26

22

25

11

14

22

12

5-8

18-19

31

12

30

14

30

19 

29 

7

28

24

6

5 

21 

27

14-16

Gage 

height 

(ft*)

4.1

3.5

7.5

4.75

4.5

6.0

4.8

3.65

4.5

4.0

3.7

6.7

4.2

5.3

4.65

6.85

3.1

3.8

5.2

3.7

4.7

4.0

3.1

3.2

3.1

4.4

3.4

4.0

3.9

3.0

3.7

3.35

3.7

3.5

7.4

4.8

5.7

4.4

3.8

3.4

3.5

4.0

4.8

4.5

3.5

4.9 5.3 ' 

4.0

3.5

3.85

4.6

3.65 

4.2 

5.2 

3.2

Discharge

12,200

9,420

30,600

15,500

14,200

22,200

15,800

10,100

14,200

11,700

10,300

26,000

12,700

18,400

15,000

26,900

7,800

10,800

17,900

10,300

15,200

11,700

7,800

8,200

7,800

13,700

8,600

11,300

10,800

7,000

9,850

8,020

9,300

8,550

27,000

14,100

18,500

12,300

9,700

8,200

8,550

10,500

14,500

13,000

8,400

15,100 

17,500 

10,500

8,400

9,820

13,500

9,000 

11,500 

16,900 

7,300

Annual floods

Order

(M)

4

9

20

6

32

12

21

30

34

5

19

13

22

14

Recurrence 

interval

10.75

4.78

2.15

7.17

1.34

3.58

2.05

1.43

1.26

8.60

2.26

3.31

1.95

3.07

Partial 

duration series

Order

(M)

52

95

4

24

33

10

22

84

34

56

78

7

48

15

29

6

125

71

16

79

26

57

126

119

127

38

107

63

72

143

88

124

97

108

5

35

14

51

93

120

109

74

31

43

28 

18 

75

114

oyQO

39

101 

58 

19 

138

Recurrence 

interval

0.83

.45

10.75

1.79

1.30

4.30

1.95

.51

1.26

.77

.55

6.14

.90

2.87

1.48

7.17

.34

.61

2.69

.54

1.65

.75

.34

.36

.34

1.13

.40

.68

.60

.30

.49

.35

.44

.40

8.60

1.23

3.07

.84

.46

.36

.39

.58

1.39

1.00

«Q

 oo 

1.54 

2.39

'.38

i!io

.43 

.74 

2.26 

.31
MAGNITUDE AND FREQUENCY OF FLOODS 

Deachutes River at Moody, near Biggs, Oreg., 1906-48

457

40

36

32

28

24

20

16

j_ 12 

ui iii 

u. Q »

o1 1

4

en

°i

5? «-H(Sm*X o 55 8 

RECURRENCE INTERVAL. IN YEARS. FOR ANNUAL FLOODS

S44 

ac.

%« 

5

36 

32

28 

24

20 

16 

12 

8

4

^

X

HX1 ^

«

'

.^^

X

_ »<

/

r

s

+ -4

J» 

X

t

/

/

/

/

r

RECURRENCE INTERVAL. IN YEARS. FOR FLOODS ABOVE 7.000 SECOND-FEET
458 FLOODS OP MAT-JUNE 1948 IN COLOMBIA RIVER BASIN

DESCHUTES RIVER BASIN 

Deachutes River at Moody, near Biggs, Oreg. Continued

Year

1921

1921

1922

1922

1923

1923

1924

1924

1925

1926

1926

1927

1927

1928

1929

1930

1931

1932

1933

1933

1934

1934

1935

1936

1937

1937

1938

1939

1940

Month

Jan.

Feb.

Mar.

Nov.

Dec.

Feb.

Mar.

Apr.

Dec.

Jan.

Mar.

Apr.

Dec.

Feb.

Nov.

Dec.

Feb.

Apr.

May

Feb.

Nov.

Jan.

Feb.

Apr.

Nov.

Jan.

Mar.

May

Mar.

Feb.

Apr.

Feb.

Mar.

Apr.

June

Dec.

Jan.

Mar.

Dec.

Apr.

Jan.

Feb.

Apr.

Apr.

June

Dec.

Jan.

Mar.

Apr.

Mar.

Feb.

Mar.

Day

3

13

6

19

22

1

17

23

4

25-27

25

7

1 (

2-5

7

29

1

22

30

6

17

21

7

29

6

2

21

29

26

13

30

12

25

1

2

2

1

27

21-22

6

29

10

23

3

24

29

22

17

5

13

27

16

17

21

12

30

22

3

19

21

27

7

28

29

Gage 

height 

(fat)

4.9

4.5

4.15

4.5

4.7

6.6

3.2

4.1

4.0

4.2

3.9

10.2

3.7

4.1

3.35

3.6

3.7

4.0

3.7

5.95

4.1

4.5

4.8

4.6

3.65

4.5

8.4

4.4

4.1

4.3

3.75

4.3

4.4

3.38

3.38

3.70

5.26

3.96

4.61

3.47

3.44

4.03

4.76

3.62

4.35

3.31

3.89

3.39

3.82

3.49

3.99

4.33

4.75

3.45

4.71

4.18

4.38

4.51

5.05

5.19

3.99

3.73

4.40

4.33

Discharge 

( ttxmd-feet)

14,900

12,800

11,000

12,800

13,800

23,900

7,170

10,800

10,300

11,300

9,860

43,600

8,160

9,860

7,270

8,240

8,660

9,800

8,550

19,000

10,200

12,000

13,300

12,400

8,350

12,000

32,400

11,500

10,200

11,000

8,760

11,000

11,500

7,400

7,400

8,550

15,700

9,640

12,400

7,690

7,580

10,000

13,100

8,290

11,200

7,120

9,360

7,410

9,080

7,790

9,760

11,200

13,000

7,640

12', 800

10,500

11,400

12,100

14,400

15,200

9,760

8,720

11,500

11,200

Annual floods

Older

(M)

18

8

1

38

10

24

3

28

41

39

16

27

33

25

36

31

26

17

35

29

Recurrence 

intorad 

(van)

2.39

5.38

43.00

1.13

4.30

1.79

14.33

1.54

1.05

1.10

2.69

1.59

1.30

1.72

1.19

1.39

1.63

2.53

1.23

1.48

Partial 

duration aeries

Order

(M)

30

45

68

46

37

9

141

73

80

64

86

1

121

87

139

118

106

90

110

11

82

54

41

49

115

55

3

59

83

69

103

70

60

135

136

111

23

94

50

129

131

85

42

117

65

142

96

133

100

128

91

66

44

130

47

76

62

53

32

27

92

105

61

67

Recurrence 

interral 

(ytan)

1.43

.96

.63

.93

1.16

4.78

.30

.59

.54

.67

.50

43.00

.36

.49

.31

.36

.41

.48

.39

3.91

.52

.80

1.05

.88

.37

.78

14.33

.73

.42

.62

.42

.61

.72

.32

.32

.39

1.87

.46

.86

.33

.33

.51

1.02

.37

.66

.30

.45

.32

.43

.34

.47

.65

.98

.33

.91

.57

.69

.81

1.34

1.59

.47

.41

.70

.64
MACadTODE AMD PRHQBEHCY OF FLOODS 459

DESCHUTES RIVER BASIN 

Deschutes River at Moody, near Biggs, Oreg. Continued

Tear

1941

1941

1942

1942

1943

1944

1945

1945

1946

1946

1947

1948

Month

Jan.

Dec.

Feb.

Mar. .

Apr.

Dec.

Jan.

Feb.

Apr.

Mar.

Feb.

Apr.

Dec.

Jan.

Mar.

Apr.

Nov.

Dec.

Jan.

Feb.

Jan.

Feb.

Apr,

May

Dav *fmy

19

20

5

14

14

2

1

7

12

1

12

14

23

29

25

2

20-21

29

15

26

17

9

23

23

Gage 

height

3.11

3.39

4.82

3.57

3.57

4.98

8.48

5.90

5.70

5.42

3.41

3.74

3.38

7.13

3.76

3.84

4.17

3.35

5.41

3.63

3.67

5.96

5.26

3.86

4.13

Period 1906-48

Discharge

6,400

7,410

13,400

8,100

8,100

14,100

32,900

18,700

17,700

16,300

7,490

8,760

7,380

25,400

8,840

9,160

10,500

7,260

16,200

8,330

8,480

19,000

15,500

9,240

10,300

Annual floods

(Mar

(M)

42

23

2

40

37

7

15

11

ReeamnM 

interval

1.02

1.87

21.50

1.08

1.16

6.14

2.87

3.91

Partial 

duration series

Oidar

(M)

134

40

122

123

36

e

13

17

20

132

104

137

8,

102

99

77

140

21

116

112

12

25

98

81

BMomne* 

interval

0.32

1.08

.35

.35

1.19

21.50

3.31

2.53

2.15

.33

.41

.31

5.38

.42

.43

.56

.31

2.05

.37

.38

3.58

1.72

.44

.53

16,210 Mean annual

White River below Tygh Valley, Oreg.

'Location.- Lat. 45°14', long. 121°06', Just below Pacific Power & Light Co.'s plant at

White' River Falls and 4£ miles east of Tygh Valley. 

Drainage area.- 393 square miles.

Records available.- October 1917 to September 1948. 

Gage.- Recording. 

Stage-discharge relation.- Defined by current-meter measurements below 5,200 secondfeet. 

Maximum flood of record.- 13,300 second-feet Jan. 6, 1923.

Tear

1917

1918

1919

1919

1920

1920

1921

Month

Dec.

Jan.

Feb.

Jan.

Apr.

May

Nov.

Jan.

May

Dec.

Jan.

Feb.

Mar.

Apr.

May

June

Day

13

19

29

4

7

23

4

1

28

4

16

26

8

30

2

5

11

1

18

22

29

25

3

Gage 

height 

&*)

3.55

8.00

7.02

4.46

4.18

4.30

3.41

3.58

3.33

4.65

5.02

5.6

3.23

4.45

5.98

4.98

4.57

3.84

4.26

4.01

3.92

3.73

3.44

Discharge

IfaeOMUwO

1,420

5,700

4,520

2,050

1,820

1,980

1,240

1,450

1,270

2,260

2,420

3,000

1,080

1,920

3,460

2,410

2,020

1,410

1,740

1,540

1,470

1,330

1,130

Annual floods

(Mar

(M)

6

23

17

12

B0cumDC*x 

interval 

(Van)

5.33

1.39

1.88

2.67

Partial 

duration series

Onto

(M)

80

6

11

49

61

54

102

77

101

42

33

24

133

56

18

35

52

83

67

72

73

94

124

Reeomnee 

interval 

<****>

0.40

5.33

2.91

.65

.52

.59

.31

.42

.32

.76

.97

1.33

.24

.57

1.78

.91

.62

.39

.48

.44

.44

.34

.26
FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN

DESCHUTES RIVER BASIN 

White River below Tygh Valley, Oreg. Continued

Year

1921

1922

1922

1923

1924

1924

1925

1926

1926

1927

1927

1927 

1928

1929

1930

1931

1932

1932 

1933

1933

1934

1934

1935

1936

1937

Month

Nov.

Dec.

May

June

Dec.

Jan.

Apr.

May

Feb.

Nov.

Feb.

Apr

May

Feb.

Nov.

Jan.

Feb.

Apr.

May

June

Nov. 

Jan.

Mar.

May

Feb.

Apr.

Jan.

Feb.

Mar. 

Apr.

May

Dec. 

Apr. 

June

Dec.

Jan.

Mar.

Dec.

Jan.

May

Jan.

Feb. 

Apr.

Apr.

May

June

Day

20

30

13

5

18

2

24

31

3

6

17

10

5

21

5

16

21

6

24

29

2

4

2

18

20

27

16

8

25 

13

11

24

24

20

1

12

27

19 

17

13

29

2 

29 

9

6

22 

3

14

17

23

2

6

20

21 

24

6

4

10

28 

19

15

4

21

Gage 

height 

<f*t>

5.30

7.80

4.73

3.97

4.95

4.03

3.57

3.66

3.64

12.9

4.02

4.41

3.70

4.8

5.8

4.07

4.45

5.50

3.73

6.95

4.20

3.63

4.70

5.25

9.3

4.40

4.50

3. $7

5.91 

4.90

5.20

3.75

3.55

3.79

10.3

k5.0

4.15

6.0 

3.80

4.1

3.89

3.74 

4.30 

5.12

4.77

7.9 

5.22

3.85

3.95

6.35

3.95

3.85

7.00

6.00 

4.04

3.91

4.85

3.88 .

3.81 

4.76

4.95

4.20

3.72

Discharge

2,730

5,820

2,170

1,690

2,600

1,730

1,370

1,440

1,420

13,300

1,450

1,760

1,220

2,000

3,020

1,410

1,690

2,690

1,170

4,470

1,630

1,210

2,050

2,540

7,880

1,790

1,870

1,170

3,230 

2,230

2,500

1,300

1,160

1,320

9,480

2,120

1,400

3,120 

1,140

1,360

1,200

1,070 

1,450 

2,220

1,870

5,450 

2,320

1,140

1,200

3,560

1,200

1,140

4,340

3,220 

1,310

1,210

2,040

1,190

1,140 

1,950

2,140

1,450

1,120

Annual floods

Older

(M)

5

1

27

16

18

3

14

30

26

2

15

20

7

10

22

21

RficumnCQ 

interval

6.40

32.0

1.19

2.00

1.78

,

10.67

2.29

1.07 .

1.23

L6.00

2.13

1.60

4.57

6. 20

I.A5

1.52

Partial 

duration seriei

Order

(M)

26

1

45

70

29

68

86

78

79

76

66

104

53

23

82

69

27

115

12

71

106

48

30

62

58

114

20 

43

31

99

118

95

2

47

84

22 

122

89

110

135 

75 

44

57

7 

38

121

109

17

108

120

13

21 

96

105

50

113

119 

55

46

74

125

toterna 

(ttan)

1.23

6.40

.71

.46

1.10

.47

.37

.41

.41

32.0

.42

.48

.31

.60

1.39

.39

.46

1.19

.28

2.67

.45

.30

.67

1.07

10.67

.51

.55

.28

1.60 

.74

1.03

.32

.27

.34

16.00

. 68

 X o

* Oo

1.45 

 26

.36

.29

.24 

.43 

.73

.56

4.57 

.84

.26

.29

1 QQ 00

.30

.27

2.46

1.52 

.33

.30

.64

.27 

.58

.70

.43

.26
MAGNITUDE AND FREQUENCY OF FLOODS 

White River below Tygh Valley, Oreg., 1917-48

461

2 9 ° S5~ « * » 2SSSSS I § § 

RECURRENCE INTERVAL, IN YEARS, FOR ANNUAL FLOODS

CM en ^ in O 

^ 

CNJ ro *t m o 

<^H 

OOQQ CM CO V w)

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 1,000 SECOND-FEET*

824933 O - 49 - 32
FLOODS OP MAY-JDHE 1948 IN COLOMBIA RIVER BASIN

DESCHUTES RIVER BASIN 

White River below Tygh Valley, Oreg. Continued

Tear

1937

1938

 1939

1940

1940

1941

1942

1942

1943

1943

1945

1945

1946

1946

1947

1947

1948

Month

Dec.

Jan.

Feb.

Mar.

Apr.

May

Mar.

Feb.

Mar.

Nov.

Dec.

Feb.

Nov.

Dec.

Jan.

Feb.

Apr.

May

June

Nov.

Feb.

May

Dec.

Jan.

Apr.

May

Dec.

Jan.

Feb.

Nov.

Jan.

Feb.

Apr.

May

June

Day

11

30

22

25

2

18

21

18

26

26

6

28

27

29

2

4

23

27

29

9

1

6

11

1

19

26

13

4

13

4

16

29

4

24

26

5

20

27

15

26

2

16

8

15

7

15

22

26

23

26

12

16

Gage 

height

(AH)

3.64

6.0?

5.30

3.68

3.90

4.83

5.07

5.20

3.61

3.88

5.0?

4.63

3.68

3.65

4.26

4.88

5.13

4.00

5.71

4.05

7.76

7.23

6.68

4.60

5.07

4.57

3.74

2.98

4.07

4.08

3.78

r7.1

3.67

3.94

4.04

4.08

4.03

4.05

8.6

5.26

4.13

3.81

3.63

3.67

7.90

3.83

6.72

4.55

3.64

5.50

3.76

3.56

Period 1918-48

Discharge

<"eM***

1,070

3,250

2,490

1,100

1,230

2,020

2,260

2,390

1,060

1,190

2,260

1,830

1,100

1,080

1,300

1,820 '

2,320

1,300

2,900

1,340

5,270

4,620

3,970

1,800

2,260

1,770

1,130

745

1,350

1,360

1,160

4,320

1,100

1,280

1,350

1,380

1,340

1-.360

6,120

2,410

1,410

1,190

1,080

1,100

5,250

1,200

3,900

1,760

1,080

2,650

1,160

1,040

Annual.floods

Order

(M)

13

28

19

29

24

8

31

25

11

4

9

interval

2.46

1.14

1.68

1.10

1.33

4.00

1.03

1.28

2.91

8.00

3.56

. 3,720 Mean annual

Partial 

duration series

Order

(M)

134

19

32

129

103

51

41

36

136

112

40

59

128

132

98

60

37

97

25

93

8

10

15

62

39

64

123

91

88

117

14

127

100

90

85

92

87

4

34

81

111

131

126

9

107

16

65

130

28

116

137

HMQ1TOC6

interval

0.24

1.68

1.00

.25

.31

.63

.78

.89

.24

.29

.80

.54

.25

.24

.33

.53

.86

.33

1.28

.34

4.00

3.20

2.13

.52

.82

.50

.26

.35

.36

.27

2.29

.25

.32

.36

.38

.35

.37

8.00

.94

.40

.29

.24

.25

3.56

.30

2.00

.49

.25

1.14

.28

.23

r From graph based on gage readings.
MAGNITUDE AMD FREQUENCY OP FLOODS

KLICKITAT RIVER BASIN 

Klickitat River near Glenwood, Wash.

Location.- Lat. 46°05'30", long. 121°15'30", half a mile downstream from Dairy Creek, 

5 miles north of Glenwood, and 7 miles upstream from Trout Creek.

Drainage area.- 360 square miles.

Records available.- December 1910 to September 1948 (1915-18, 1920-28 fragmentary or 

partly estimated). October 1909 to December 1910 at site 1 mile upstream.

Gage.- Non-recording gage read once dally prior to July 19, 1910; recording gage thereafter. Datum of gage Is about 1,703 feet above mean sea level, datum of 1929, since 

July 1934.

Stage discharge relation.- Defined by current-meter measurements below 3,000 second- feet. " 

Maximum flood of record.- 9,870 second-feet Dec. 22, 1933.

3teinarke.- Some diversion for Irrigation during spring and summer. No regulation. Peak 

discharges prior to July 19, 1910, based on one gage reading per day; time of readIng not known.

Year

1909

1910

1910

1911

1912

1913

1914

1915

1916

1917

1917

1919

1920

1926

Month

Nov.

Dec.

Jan.

Mar.

Apr.

May

Nov.

Apr.

May

June

Apr.

May

June

Apr.

May

June

Jan.

Mar.

Apr.

May

June

Apr.

June

June

Dec.

Jan.

Apr.

May

June

May

Apr.

Day

3

24

30

12

25

3

20-22

25

10

24

10

21

2

25

4

18

1-2

13

10

14-15

2-8

26

10

27

3

23

7

23

15

20

3

15

17

3

18

9

-

18

23

4

1

27

20

17

18

Gage 

heignt 

<f*t)

3.10

5.20

3.4Q

2.00

2.40

2.45

3.25

3.20

3.15

2.40

1.84

1.67

1.62

2.02

2.14

2.15

2.68

2.58

1.72

2.87

2.45

2.10

2.72

3.21

3.33

2.45

2.93

1.99

2.92

2.85

2.78

2.95

1.98

2.62

3.47

2.90

4.2

3.04

4.26

2.34

2.98

3.33

2.40

2.58

2.99

Discharge

2,100

6,250

3,700

1,720

2,280

2,350

3,490

3,410

3,340

2,280

1,720

1,510

1,250

1,750

1,920

1,940

2,910

2,740

1,320

2,790

2,150

1,680

2,320

3,100

3,310

2,150

2,890

1,430

2,770

2,660

2,550

2,820

1,380

2,200

4,620

3,300

6,200

2,480

4,600

1,510

2,400

2,790

1,420

1,810

1,750

Annual floods

(Mer

(M)

2

15

17

10

16

23

4

11

3

5

28

29

Recurrence 

interval 

foeom>

16.5

2.20

1.94

3.30

2.06

1.44

8.25

3.00

11.0

6.60

1.18

1.14

Partial 

duration aeries

Order

(M)

64

2

11

90

54

51

12

13

15

55

91

108

122

88

77

74

26

33

118

29

60

96

52

21

16

61

27

113

32

38

41

28

116

-

-

-

-

43

3

109

47

30

114

-

-

Recurrence 

interval 

(yean)

0.42

13.5

2.46

.30

.50

.53

2.25

2.08

1.80

.49

.30

.25

.22

.31

.35

.36

1.04

.82

.23

.93

.45

.28

.52

1.28

1.69

.44

1.00

.24

.84

.71

.66

.96

.23

-

-

-

-

.63

9.00

.25

,57

.90

.24

-

-
464 FLOODS OP MAY-JUNE 1948 IN COLUMBIA RIVER BASIN 

Klickitat River near Glenwood, Wash.

10 

9 

8 

7 

6 

5 

4

t

LlJ 

| 2

O 

O i

LlJ 1

(ft

U.

0 0, 

(ft = 

Q

Z 

<

^

i-^

i-» >^>

-<* t < r*

V**^

X

^-'

/

/

f 

/

191

7

0-2O

,

/

/

^

,19

f

26 ,1 9. >£ K18

 " JoS in o OCM tf> ^ tft Oinoooo OQ'C 55 -i -. CM m 5 K S5Je

RECURRENCE INTERVAL, IN YEARS. FOR ANNUAL FLOODS

X

^

^

r" ^

! t

y

91 3- 4

-

1

^

91

^

9.1929-4

~7

/

/

8

/

/

-i ojro^m o cvj ro tt m O S ° 3 ^

RECURRENCE INTERVAL, IN YEARS. FOR FLOODS ABOVE 1.220 SECOND-FEET
MAGNITUDE AMD FREQUENCY OP FLOODS 465

KLICKITAT RIVER BASIN 

Kllckltat River near Glenwood, Wash. Continued

Year

1929

1930

1931

1932

1932

1933

1933

1934

1934

1935

1936

1937

1937

1938

1939

1939

1940

1941

1942

1943

1944

Month

May

June

Feb.

Apr.

May

Mar.

May

Feb.

Mar.

Apr.

May

June

Nov.

Apr.

June

Nov.

Dec.

Jan.

Mar.

Apr.

Oct.

Nov.

Dec.

May

Apr.

May

June

Apr.

May

June

Dec.

Jan.

Apr.

May

June

May

Dec.

Mar.

May

Apr.

May

Dec.

Apr.

May

Nov.

Mar.

Apr.

May

June

May

Day

3

24

15

20

23

L6-17

31

2

14

27

19

17

-

13

13

17

29

9

15

3

10

22

23

6

29

23

25

6

21

23

23

4

14

28

7

14

4

26

3

21

30

14

18

1

16

27

22

16

29

_

30

10-11

1-2

1

17

3

20

13

22

9

23

23

29

19

25

10

18

8

Gage 

height 

(f*t)

2.69

3.80

3.11

2.72

2.93

2.63

3.27

3.77

3.31

3.34

2.99

3.00

4.09

3.39

3.25

3.94

3.99

4.76

4.77

2.88

4.82

6.90

3.70

1.86

2.51

1.95

2.58

3.62

2.75

3.47

3.49

3.78

4.08

3.72

3.84

3.32

3.46

3.69

3.86

3.96

3.44

3.10

4.65

4.86

4.90

5.43

4.17

4.26

4.09

3.70

4.36

4.65

4.18

3.90

4.19

4.71

4.60

4.64

4.79

4.50

4.98

4.90

4.70

5.71

5.96

5.40

5.31

4.23

Discharge 

( tamd-fttt)

1,460

2,560

1,840

1,460

1,520

1,280

1,740

2,200

1,790

1,890

1,540

1,540

2,700

1,940

1,760

2,710

2,780

3,950

3,950

1,400

3,950

9,870

3,980

1,880

2,570

1,980

1,640

2,680

1,620

2,300

2,360

2,700

3,070

2,250

2,420

1,850

1,860

2,110

2,280

2,390

1,600

1,280

2,940

3,260

3,960

2,040

2,140

1,880

1,290

1,720

2,040

1,540

1,240

1,540

2,070

1,960

1,660

1,820

1,490

2,050

1,930

1,710

2,930

3,280

2,540

2,410

1,220

Annual floods

Order

(M)

20

31

24

18

8

1

19

14

21

7

25

27

30

26

12

32

R0U4V1GBCA

interval 

(yam)

1.65

1.06

1.38

1.83

4.12

33.0

1.74

2.36

1.57

4.71

1.32

1.22

1.10

1.27

2.75

1.03

Partial 

duration series

Order 

(M)

111

40

84

112

107

120

89

58

86

79

103

104

35

75

87

34

31

8

7

115

9

1

5

80

39

70

99

37

100

53

50

36

22

57

44

83

82

63

56

48

101

121

24

20

18

6

67

62

81

119

92

68

105

123

106

65

71

97

85

110

66

76

93

25

17

42

46

124

R0CUfT6ttC£

interval

ftimnmml fyBorvp

0.24

.68

.32

.24

.25

.22

.30

.46

.31

.34

.26

.26

.77

.36

.31

.79

.87

3.38

3.86

.24

3.00

27.0

5.40

.34

.69

.39

.27

.73

.27

.51

.54

.75

1.23

.47

.61

.33

.33

.43

.48

.56

.27

.22

1.12

1.35

1.50

4.50

.40

.44

.33

.23

.29

.40

.26

.22

.25

.42

.38

.28

.32

.25

.41

.36

.29

1.08

1.59

.64

.59

.22
FLOODS OP MAY-JUNE 1948 III COLUMBIA RIVER BASIN

KLICKITAT RIVER BASIN 

Klickitat River near Glenwood, Wash. Continued

Year

1945

1946

1946

1947

1947

1948

Month

Feb.

May

Apr.

May

Nov.

Dec.

Apr.

May

June

Oct.

Apr.

May

June

Day

8

4or 5

31

26

<19

18

14

20

8

28

-8

20

23

26

11

16

Gage ' 

height 

</*)

4.68

5.41

5.02

5.27

6.05

5.20

6.32

4.52

5.29

4.80

4.66

5.08

4.45

7.00

5.90

5.43

Period 1910-20, 1926, 1929-48

Discharge

1,710

2,380

1,910

2,200

3,210

ml, 990

ra3,410

ml, 660

ra2,420

ml, 710

ml, 560

ml, 950

ml, 370

ra4,200

ra3,920

ra3,040

Annual floods

Order

(M)

22

13

9

6

interval

1.50

2.54

3.67

5.50

Partial 

duration aeries

Order

(M)

94

49

78

59

19

69

14

98

45

95

102

73

117

4

10

23

Recurrence 

interval

ftwom)

0.29

.55

.35

.46

1.42

.39

1.93

.28

.60

.28

.26

.37

.23

6.75

2.70

1.17

3,220 Mean annual

m Provisional, subject to revision.

COWLITZ RIVER BASIN 

Cowlitz River at Castle Rock, Wash.

Location..- Lat. 46°16'30", long. 122°55'00", at highway bridge in Castle Rock, 2£ miles

downstream from Toutle River and 14 miles upstream from mouth. 

Drainage area.- 2,240 square miles. 

Records available.- December 1926 to September 1948. 

Gage.- Staff gage read twice daily Dec. 10, 1926, to Dec. 10, 1933. Wire-weight gage

read once or twice daily Dec. 29, 1933, to June 14, 1934. Recording gage thereafter.

Datum of recording gage, 19.73 feet above mean sea level, datum of 1929. 

Stage-discharge feet. relation.- Defined by current-meter'measurements below 79,300 secondMaximum flood of record.- 139,000 second-feet Dec. 23, 1933. 

Remarks.- Gage-heights for period when non-recording gage was used are from graph based

on gage readings. No diversion or regulation.

Year

1927

1928

1929

1930

1931

1931

1932

Month

Oct.

Nov.

Jan.

Mar.

May

May

Feb.

.

Jan.

Feb.

Apr.

Dec.

Jan.

Feb.

Mar.

Apr.

Day

4

25

4

13

11

31

1

25

8

14

20

24

29

19

1

18

12

18

27

6

19

19

Gage 

height 

0W>

9.55

13.95

9.20

10.80

8.07

9.05

7.85

7.31

8.80

7.96

8.60

7.92

7.50

8,06

13.15

8.20

8.92

8.50

11.30

11.63

9.28

7.60

Discharge 

<Hcond-feet>

36,800

74,000

33,700

46,400

26,000

32,300

23,900

21,800

30,900

25,300

29,500

24,600

21,800

26,000

66,800

26,700

31,600

28,800

50,400

52,800

34,400

22,500

Annual floods

Order

(M)

3

21

19

4

11

Recurrence 

interval 

(yean)

7.33

1.05

1.16

5.50

2.00

Partial 

duration series

Order

(M)

41

4

48

22

76

50

86

100

53

81

60

83

101

77

6

72

51

64

15

13

46

96

Recurrence 

interval 

(yean)

0.54

5.50

.45

1.00

.29

.44

.26

.22

.42

.27

.37

.26

.22

.29

3.67

.31

.43

.34

1.47

1.69

.48

.23
MAGNITUDE AND FREQUENCY OP FLOODS 

Cowlitz River at Castle Rock, Wash., 1928-46

90

70

gff\

ti

LLl

Q

o

LLl (f>

U.

If! '

? =

/

\ I

J

s

3

4

f

f'

j

.r

$ *

^'

i

s

tf

r^-

t

-^

a

s

>

/

/

/

/

C

/

//

3 u

H ^

/

1

I g

/

3 §; i? 5! g 5\ 8

RECURRENCE INTERVAL. IN YEARS, FOR ANNUAL FLOODS

z

#130 

<E

0 120

V) 

0

no

100 

90 

80 

70 

60 

50 

40

30 

tn X

^

/

^

 i

KX

^

**

f

A

r

j

/

1

y

x

/

/

/

'

RECURRENCE INTERVAL, IN YEARS, FOR FLOODS ABOVE 21,800 SECOND-FEET
FLOODS OF MAY-JOKE 1948 IH COLUMBIA RIVER BASIN

COWLITZ RIVER BASIN 

Cowlitz River at Castle Rock, Wash. Continued

Year

1932

1933

1933

1934

1934

1935

1936

1936

1937

1937

1938

1938

1939

1939 

1940

1940 

1941

1941

1942

1943

1943

1945

1945

1946

Month

Nov.

Dec.

Jan.

June

Oct.

Nov.

Dec.

Jan.

Mar.

Oct.

Nov.

Dec.

Jan.

Jan.

Feb.

May

June

Dec.

Apr.

June

Nov.

Dec.

Jan.

Apr.

Dec.

Jan.

Feb.

Dec. 

Feb.

Nov. 

Jan.

Nov.

Dec.

Nov.

Jan.

Feb.

Mar.

Dec.

Jan.

Feb.

May

Nov.

Dec. 

Jan.

Feb.

Day

6

14

3

2

9

9

24

3

10

23

23

3

30

26

6

23

6

22

4

12

27

5

16

8

23

15

21-22

9

14

25

18

30 

15

18

5

3

12

15

16 

7

29

29 

18

15

3

20

15

24

1

6

11

28

4

8

14

8

4

27

29 

5

24

2

6

27

Gage 

height 

(f**)

8.58

11.70

10.70

7.58

11.60

9.52

7.60

10.28

23.0

26.6

17.63

9.42

8.72

18.33

20.39

17.26

14.06

18.48

16.75

18.12

15.42

13.61

12.96

15.74

16.85

18.24

14.54

14.77

14.02

16.19

13.36

20.38 

15.82

17.43

13.23

14.79

15.77

17.31

17.00 

16.19

13.32

14.07 

13.16

14.00

14.43

19.74

13.48

20.10 

13.61

15.01

14.00

17.07

15.24

15.05

15.16

17.67

13.43

14.63

19.91 

17.07

14.36

13.95

14.60

14.00

Discharge (fcnmd/Mtf

29,500

53,600

45,600

22,500

52,800

36,000

22,500

42,400

111,000

139,000

73,100

25,500

22,300

48,800

61,800

42,800

25,400

50,000

40,700

.48,200

33,300

24,500

21,800

34,800

40,700

48,800

28,800

30,500

26,800

37,600

23,600

62,900 

35,700

44,300

23,000

30,600

35,400

43,600

41,900 

37,600

23,400

26,400 

22,200

26,100

28,200

58,100

23,700

60,500 

23,200

30,400

25,200

41,800

37,100

30,600

31,200

45,300

22,400

26,800

54,700 

38,400

25,600

23,800

26,600

24,000

Annual floods

Order

(M)

10

1

6

13

12

5

15

16

20

8

7

18

14

9

ROCUIFBHCC 

interval 

Cyran)

2.20

22.0

3.67

1.69

1.83

4.40

1.47

1.38

1.10

2.75

3.14

1.22

1.57

2.44

Partial 

duration series

Order

(M)

61

12

23

95

14

42

94

28

2

1

5

79

98

18

8

27

80

16

31

21

498*4

102

45

32

19

65

57

70

37

89

7 

43

25

93

55

44

26

29 

38

91

74 

99

75

67

10

88

9 

92

58

82

30

40

56

52

24

97

71

11 

35

78

87

73

85

Rocurronoft 

interval

frMf4

0.36

1.83

Q R .yb

.23

1.57

.52

.23

.78

11.0

22.0

4.40

.28

.22

1.22

2.75

. mOJL

.27

1.38

.71

1.05

.45

.26

.22

.49

.69

1.16

.34

.39

.31

cq 

. o«7

.25

3.14 

.51

.88

.24

.40

.50

.85

.76 

.58

.24

.30 

.22

.29

.33

2.20

.25

2.44 

.24

.38

.27

.73

.55

.39

.42

.92

.23

.31

2.00 

.63

.28

.25

. 30

\Z&
MAGNITUDE AND FREQUENCY OF FLOODS 469

COWLITZ RIVER BASIN 

Cowlitz River at Castle Rock, Wash. Continued

Year

1946

1947

1947

1948

Month

Nov.

Dec.

Jan.

Feb.

Oct.

Nov.

Dec.

Jan.

Feb.

Mar.

May

Day

19

28

5

15 

26

2

15

20

8

19

2

7

26

22

7

26

Gage 

heignt 

<f«t>

18.89

15.02

14.89

24.47

19.36

16.83

15.10

17.18

17.16

14.20

15.36

17.08

16.91

15.70

15.44

15.56

Period 1928-48

Discharge 

( eooxd^ttt)

48,500

28,500

28,000

85,600 

m 50, 000

m 34, 300

m27,700

m38,600

m38,500

m23,500

m28,900

m 38, 100

m 37, 200

m 30, 700

m 29, 300

m 29, 900

Annual floods

Older

(M)

2

17

Rccurrenoe 

internl

(yeart)

11.0

1.30

Partial 

duration series

Older

(M)

20

66

68

3 

17

47

69

33

34

90

63

36

39

54

62

59

R0CUR6DOB

interval

ftnttrml \ytarv

1.10

.33

.32

7.33 

1.29

.47

.32

.67

.65

.24

.35

.61

.56

.41

.35

.37

54,880 Mean annual

m Provisional, subject to revision.

LIST OF REFERENCES

s, Julian, 1944,

CrOSSBoardPB'li9476 ' Floods ln Ohlo> "^Snitude and frequency: Ohio Water Resources 

Foster, H^A., 1924, Theoretical frequency curves: Am. Soc. Civil Eng. Trans., vol. 87,

Qeyer, John C., 1940, New curve-fitting method for analysis of flood records: Am. 

Qeophys. Union Trans., Pt. 2, pp. 660-668.

Goodrich, R. D., 1927, Straight-line plotting of skew-frequency data: Am. Soc. Civil 

Eng. Trana., vol. 91, pp. 1-91.

Qumbel, E. J 1943, On the plotting of flood discharges: Am, Oeophys. Union Trans., 

pp. 699-716.

Gumbel, E. J., .June 14, 1945, Floods estimated by-probability method: Eng. News-Record 

vol. 134, p. 833.

Hazen, Alien, 1930, Flood flows: New York, John Wlley & Sons, Inc.

Jarvls, C. S., and others, 1936, Floods in the United States, magnitude and frequency: 

U. S. Qeol. Survey Water-Supply Paper 771.

Illlnols Illinois

Powell, Ralph W., Feb. 1943, A simple method of estimating flood frequencies: Civil 

Eng., pp. 105-6.

^J> J '' Jl>> ' 1936 ' ** asymetrical probability function; Am. Soc. Civil Eng. 

Trans., vol. 101, pp. 35-104.

INDEX

Page 

Abstracts ........................... .1, 317

Acknowledgments ..................... .4, 318

Administration of the work. ....... .3-4, 318

Ahsahka, Idaho, North Fork Clearwater River near ............... 239

Ahtanum Creek, North Fork, near

. Tampico, Wash. ............... .426-428

South Fork, at Conrad Ranch, near

Tampico, Wash. ................. 164

Alturas Lake Creek near Obsidian,

Idaho. ......................... 205

American River near Nile, Wash....... 179

Analysis, methods. ................. .326-327

Annual- flood method ................. 328

comparison with partial-durationseries method. ............... .329-330

Ariel, Wash., Lewis River at......... 275

Ashley Creek near Kalispell, Mont.... 123

Asotin Creek near Asotin, Wash....... 230

Asotin Creek Basin, Wash., gagingstation records in. ............ 230

Astoria, Oreg., Youngs River near.... 277

Aurora, Oreg., Pudding River near.... 273

(tributary to Bitterroot 

) near 109

Bear Creek

River) near Victor, Mont 

Bear Creek (tributary to Middle Fork

Flathead River) near Essex,

Mont ..................'......... 118

Bear Creek (tributary to Wallowa

River) near Wallowa, Oreg...... 229

Bear Valley Creek near Cape Horn,

Idaho .......................... 211

Belton, Mont., Middle Fork Flathead

River at. .................... .378-380

Middle Fork Flathead River near.... 117

Big Creek near Big Creek, Idaho...... 212

Big Fork, Mont., Swan River near. .. .385-387

Biggs, Oreg., Deschutes River

near. .................... .266,456-459

Birch Creek at Kieth, Oreg. .......... 254

Birchbank, British Columbia,

Columbia River at .............. 48

Bitterroot River, East Fork, at

Conner , Mont ................... 105

near Darby, Mont ...............'.... 104

West Fork, near Conner, Mont....... 103

Bitterroot River (West Fork) Reservoir near Conner, Mont ......... 87

Blackfoot River near Bonner, Mont.... 100

near Helmville, Mont ............... 98

near Ovando , Mont .................. 99

Blodgett Creek near Corvallis,

Mont.......... ............ ....107-108

Blue Creek near Walla Walla, Wash... 244 

Blue Lake near Coulee City, Wash..... 162

Boise River, South Fork, near Lenox,

Idaho. ....................... .431-434

Bonner, Mont., Blackfoot River near.. 100

Bonners Ferry, Idaho, flood scene. 63, pi. 9, A

Kootenai River at. ......... .61-62,344-346

Kootenai River near ............. .60,63,64

Boom Camp, near Bonners Ferry, Idaho,

Kootenai River at .............. 60

Boulder Creek (Kootenai River Basin)

near Leonia, Idaho. ....... .70,346-349

Boulder Creek (Pend Oreille River

Basin) at Maxville, Mont ....... 95

Boundary Creek near PorthJID, Idaho .76,357-359 

Bull Run, Oreg., Sandy River near.... 269

Bull Run River near Bull Run, Oreg.,

Sandy River below. ............. 269

Bumping Lake near Nile, Wash. ........ 177

Bumping River near Nile, Wash........ 178

Bungalow ranger station, Idaho, North

Fork Clearwater River at ....... 238

Burgdorf, Idaho, Secesh River near... 217 

Burnt Fork Creek near Stevensville,

Mont ........................... 110

Burnt River near Hereford, Oreg...... 190

Burnt River Basin, Oreg., gaging -

st'ation records in. ............ 190

Page 

Butter Creek near Pine City, Oreg.... 255

Calder, Idaho, St. Joe River at.139,403-406 

Camas Creek near Ukiah, Oreg......... 263

Camas Reservoirs, Mont............... 88

Canal Flats, British Columbia,

Kootenay River at.............. 55

Canby, Oreg., Molalla River near..... 272

Cape Horn, Idaho, Bear Valley Creek

near........................... 211

Middle Fork Salmon River near...... 210

Carson, Wash., Wind River near....... 269

Castle Rock, Wash., Cowlitz River

at........................276,466-469

Cataldo, Idaho, Coeur d'Alene River

near..........................397-400

Catherine Creek near Union, Oreg.... 224

Cathlamet, Wash., Elokomtn River

near........................... 277

Cazadero, Oreg., Clackamas River near 274

Challis, Idaho, Challis Creek near... 208

Salmon River near.................. 200

Challis Creek near Challis, Idaho.... 208

Characteristics of floods in Columbia

River Basin. ..................322-326

Chelan, Wash., Chelan Rivei at....... 151

Lake Chelan at..................... 150

Chelan River at Chelan, Wash......... 151

Chelan River Basin, Wash., flood

magnitude and frequencies in.,415-422 

gaging-station records in.....149-152

Chiwawa River near Plain, Wash....... 156

Clackamas River near Cazadero, Oreg.. 274 

Clark Fork, Mont., flood scenes... .82,pi.10

Clark Fork above Missoula, Mont..78,360-362 

at St. Regis, Mont............ 81, 364-367

at Tarkio, Mont.................... 80

below Missoula, Mont..............362-364

near Heron, Mont................... 83

near Plains, Mont..............82,368-369

Clarkston, Wash., Snake River

near..................187-188,428-431

dayton, Idaho, Salmon River

near......................199,437-439

Yankee Fork Salmon River near...... 207

Clearwater River at Kamiah,

Idaho.........233-234,445-448,pi.12,A

at Spalding, Idaho................. 234

North Fork, at Bungalow ranger

station, Idaho................. 238

near Ahsahka, Idaho.... .......... 239

South Fork, near Elk City, Idaho... 236 

near Grangeville, Idaho.......... 237

Clearwater River Basin, Idaho, gaging-station records in........231-240

Cle Elum, Wash., Teanaway River near. 175 

Yakima River at.................... 165

Cle Elum Lake near Roslyn, Wash...... 172

Cle Elum River near Roslyn, Wash.. .'.173-174 

Coeur d'Alene Lake at Coeur d'Alene,

Idaho.......................... 135

Coeur d'Alene River at Enaville,

Idaho.......................... 133

near Cataldo, Idaho...........134, 397-400

near Prichard, Idaho............... 132

Columbia Falls, Mont., Flathead River

at. ...................... .113,374-376

Flathead River near...............372-374

South Fork Flathead River near....381-383

Columbia River at Birchbank, British

Columbia....................... 48

at Grand Coulee Dam, Wash.......... 51-52

at international boundary.......... 49

at Kettle Falls, Wash.............335-336

at Nicholson, British Columbia..... 46

at Revelstoke, British Columbia.... 47

at Trinidad, Wash.................. 53

near international boundary, stage

relations.....................315-316

near The Dalles, Oreg..........54,336-338

Columbia River Basin, characteristics

of floods.....................322-326

471
472 INDEX

Page 

Columbia River Basin, magnitude and

frequency- of floods...........317-469

physical features.................318-322

Columbia River main stem, British

Columbia-Wash.-Oreg., gagingstation records on............. 46-54

flood magnitude and frequencies

on............................335-338

Colville, Wash., Mill Creek near..... 131

Colville River at Kettle Falls,

Wash......................130,394-397

Colville River Basin, Wash., flood

magnitude and frequencies in..394-397 

gaging-station records in.........130-131

Como Lake near Darby, Mont........... 87

Comparison of annual-flood and 

partial-duration-series 

methods.......................329-330

Conner, Mont., East Fork Bitterroot

River at....................... 105

West Pork Bitterroot River near.... 103

West Pork Bitterroot River Reservoir near...................... 87

Conrad Ranch, near Tampico, Wash.,

South Pork Ahtanum Creek at.... 164

Coolin, Idaho, Priest Lake near...... 125

Priest River near.................387-389

Copeland, Idaho, Kootenai River near. 65 

Corvallis, Mont., Blodgett Creek

near..........................107-108

Coulee City, Wash., Blue Lake near... 162 

Park Creek near.................... 161

Park Lake near...................... 162

Cowlitz River at Castle Hook, Wash. 276,466-469 

Cowlitz River Basin, Wash., flood

magnitude and frequencies in..466-469 

gaging-station records in.......... 276

Crab Creek at Irby, Wash............. 158

near Moses Lake, Wash.............. 159

near Smyrna, Wash.................. 160

near Warden, Wash.................. 159

Crab Creek Basin, Wash., gagingstation records in............158-162

Crescent Valley, British Columbia,

Slocan River at................ 77

Crest stages, flood.................306-315

Crow Reservoir (Lower), Mont......... 89

Curve, enveloping...................331-333

Dale, Oreg., North Pork John Day

River near..................... 261

Damage, flood........................ 13-15

Darby, Mont., Bitterroot River near.. 104 

Como Lake near..................... 87

Rock Creek near.................... 106

Rock Creek Canal near.............. 106

Dartford, Wash., Little Spokane River

near........................... 143

Data, explanation of................. 39-45

Dayton, Wash., East Pork Touchet

River near..................... 246

Dayville, Oreg., John Day River near. 257 

Deep Creek at Moravia, Idaho.....73,352-354

Deschutes River at Moody, near

Biggs, Oreg.............. 266,456-459

Deschutes River Basin, Oreg., flood

magnitude and frequencies in..456-462 

gaging-station records In.......... 266

Discharge, records of................46-277

Discharges, determination of flood... 37 

summary of flood..................278-305

Drewsy, Oreg., Malheur River near...435-437 

Drummond, Mont., Flint Creek near.... 92

Dry Pork Reservoir, Mont............. 88

Dry Pork Reservoir (Upper),Mont...... 88

Easton, Wash., Kachess Lake near..... 169

Kachess River near................170-171

Eastport, Idaho, Moyle River at...... 71

Eileen, Idaho, Moyle River at.......349-351

Elk City, Idaho, South Pork Clearwater River near............... 236

Elokomin River near Cathlamet, Wash.. 277 

Elokomin River Basin, Wash., gagingstation records in............. 277

Enavllle, Idaho, Coeur d'Alene River

at. ............................ 133

Entiat River, Wash., flood

scene.....................148,pi.11,B

Page 

Enveloping curve....................331-333

Ephrata, Wash., Rocky Ford Creek near 161 

Error, probable, of flood-frequency

graph......................... 330-331

Essex, Mont., Bear Creek near........ 118

Middle Fork Plathead River at...... 116

Skyland Creek near.................' 119

Ferry, Wash., Kettle River

near. ..................... .128,389-391

Finn, Mont., Nevada Creek above

reservoir, near................ 101

Nevada Creek Reservoir near........ 87

Plathead, British Columbia, Flathead

River at....................... HI

Plathead Lake at Somers, Mont........ 114

Flathead River at Columbia Falls,

Mont......................113,374-376

at Plathead, British Columbia...... Ill

Middle Fork, at Belton, Mont......378-380

at Essex, Mont................... 116

near Belton, Mont................ 117

near Columbia Palls, Mont.....112,372-374

near Poison, Mont.............115,377-378

South Fork, near Columbia Palls,

Mont......................120/381-383

Flint Creek at Maxville, Mont........ 91

near Drummond, Mont... ............ 92

near Maxville, Mont................ 92

near Southern Cross, Mont.......... ?0

[Flood orest stages.................. 306-315

Flood damage......................... 13-15

Flood determinations, map of location

of.....................in poeket,pl.6

Flood discharges, determination of... 37 

summary of........................278-305

Flood-frequency graph,probable errcr.330-331 

Flood magnitude and frequencies.....333-465

Flood stages, summary of............278-305

Floods, characteristics of, In 5-12 

Columbia River Basin..........322-326

general description of............. 5-12

magnitude and frequency of, In

Columbia River Basin..........317-469

Portine Creek near Trego, Mont....... 68

Fox Creek at gorge, near Fox, Oreg... 265 

Franklin D. Roosevelt Lake at Grand

Coulee Dam, Wash............... 50

French Creek, Idaho, Salmon River

near........................... 203

Frequencies, flood.................. 333-469

Frequency of floods In Columbia

River Basin...................317-469

aarrlson Creek at Walla Walla, Wash.. 245 

Georgetown Lake near Southern Cross,

Mont........................... 86

Gibbon, Oreg., ttaatllla River above

Meacham Creek near............. 248

Glenwood, Wash., Klickltat River

near..........................463-466

Grand Coulee Dam, Wash., Columbia

River at....................... 51-52

Franklin D. Roosevelt Lake at...... 50

Grande Ronde River at La Grande, Oreg. 221 

at lower end of State ditch,

Oreg........................54,pl.7,B

at; Rondowa, Oreg..............222,442-445

at Troy, Oreg...................... 223

near Hllgard, Oreg................. 220

Grande Ronde River Basin, Oreg.,

gaging-station records In.....220-229

Grangevllle, Idaho, South Fork

Clearwater River near. .......... 237

Gumboot Creek, Oreg., Imnaha River

above.......................... 195

Halnes, Oreg., Powder River near..... 192

Hall, Mont., Willow Creek near....... 96

Hayden Creek near Hayden Lake, Idaho. 141 

Hayden Lake at Hayden Lake, Idaho.... 141

Helsson, Wash., East Pork Lewis River

near........................... 275

Helmville, Mont., Blackfoot River

near........................... 98

Nevada Creek near.................. 102

Hereford, Oreg., Burnt River near.... 190

Heron, Mont., Clark Fork near........ 83

Hllgard, Oreg., Grande Ronde River

near........................... 220
INDEX 473

Page 

Hood River near Hood River, Oreg..... 267

Hood River Basin, Oreg., gagingstation records. In............. 267

Hope,, Idaho, Fend Orellle Lake at.... 84

Hubbart Reservoir, Mont.............. 88

Hurricane Creek near Joseph, Oreg.... 227

Hydrologle conditions................ 15-37

Icicle Creek above Snow Creek, near

Leavenworth, Wash.............. 157

Imbler, Oreg., Indian Creek near..... 225

Imnaha River above Gumboot Creek,

Oreg........................... 195

at Innaha, Oreg.................... 196

Imnaha River Basin, Oreg., gagingstatlon records In............195-196

Indian Creek near Imbler, Oreg....... 225

International boundary, Columbia

River at....................... 49

Columbia River near, stage

relations..................... .315 316

Introductions...................1-3,317~-318

Irby, Wash., Crab Creek at........... 158

Italian Creek, near Kalama, Wash.,

Kalama River below............. 276

John Day River at McDonald Perry,

Oreg........................ k .452-455

at Picture Gorge, near Dayville,

Oreg........................... 257

at Prairie City, Oreg.............. 256

at Service Creek, Oreg............. 258

Middle Pork, at Hitter, Oreg....... 264

North Pork, at Monument, Oreg...... 262

near Dale, Oreg.................. 261

John Day River Basin, Oreg., flood

magnitude and frequencies in..452-455 

gaging-station records in.........256-265

Johnson Creek (Salmon River Basin) at

Yellow Pine, Idaho............ 215,216

Johnson Creek (Willamette River

Basin) at Sycamore, Oreg....... 274

near Landmark ranger station, Idaho 214 

Joseph, Oreg., East Pork Wallowa

River near..................... 226

Hurricane Creek near............... 227

Wallowa Palls power-plant tallrace

near........................... 226

Kachess Lake near Easton, Wash....... 169

Kachess River near Easton, Wash.....170-171

Kalama, Wash., Kalama River near..... 276

Kalama River below Italian Creek,

near Kalama, Wash.............. 276

Kalama River Basin, Wash., gagingstation records In............. 276

Kallspell, Mont., Ashley Creek near.. 123' 

Whlteflsh Creek near..............383-384

Kamlah, Idaho, Clearwater River

at............233-234,445-448,pi.12,A

Keechelus Lake near Martin, Wash..... 163

Kendrlck, Idaho, Pbtlateh Creek at... 240 

Kettle Falls, Wash., Columbia River

at............................335-336

Colvllle River at.................394-397

Kettle River near Perry, Wash...128,389-391 

near Laurler, Wash............129,392-394

Kettle River Basin, Wash., flood

magnitude and frequencies In..389-394 

gaglng-statlon records in.........128-129

Kicking Horse Reservoir, Mont........ 89

Klona, Wash., Yakima River at........ 168

"Kllckltat River near Olenwood, Wash.463-466 

near Pitt, Wash.................... 267

Kllckltat River Basin, Wash., flood

magnitude and frequencies in..463-466 

gaging-statlon records In.......... 267

Klockman Ranch, near Bonners Ferry,

Idaho, Kootenal River at....... 64

Knox, Idaho, South Pork Salmon River

near........................... 213

Kootenal River at Bonners Ferry,

Idaho...................61-62,344-346

at Boom Camp, near Bonners Ferry,

Idaho.......................... 60

at Klockman Ranch, near Bonners

Ferry, Idaho................... 64

at Leonla, Idaho...............59,342-344

at Llbby, Mont.................58,338-341

Page 

Kootenai River at Porthill, Idaho.... 66

flood scenes......................62,pi.8

near .Bonners Ferry, Idaho.......... 63

near Copeland, Idaho............... 65

Kootenai River Basin, British

Columbia-Idaho-Mont., flood 

magnitude and frequencies in..338-359 

gaging-station records in.......... 55-77

Kootenay Lake at Kuskonook, British

Columbia....................... 67

Kootenay River at Canal Plats,

British Columbia............... 55

at Newgate, British Columbia....... 57

at Wardner, British Columbia....... 56

Kuskonook, British Columbia, Kootenay

Lake at........................ 67

La Qrande, Oreg., Grande Ronde River

at............................. 221

Lake Chelan at Chelan, Wash.......... 150

Lake Creek near Troy, Mont........... 69

Landmark ranger station, Idaho, Johnson Creek near. ..*.............. 214

Latah Creek at Spokane, Wash ......... 142

Laurler, Wash., Kettle River

near......................129,392-394

Leavenworth, Wash., Icicle Creek near. 157 

Lenore Lake near Soap Lake, Wash...... 162

Lenox, Idaho, South Pork Boise River

near..........................431-434

Leonia, Idaho, Boulder Creek near .. .346-349 

Kootenai River at.................342-344

Lewis River at Ariel, Wash........... 275

'East Pork, near Heisson, Wash. . 275

Lewis River Basin, Wash., gagingstation records in............. . 275

Libby, Mont., Kootenai River at..58,338-341 

Little Bitterroot Lake, Mont......... 88

Little Spokane River near Dartiford.

Wash........................... 143

Little White Salmon River at Wlllard,

Wash...................... ..... 268

Little White Salmon River Basin, Wash.,

gaging-station records in....... 268

Lochsa River near Lowell, Idaho....... 235

Long Canyon Creek near Porthill,

Idaho....................63,74 pl.9,B

Long Lake, Wash., Spokane River at.. . 138 

Lostine River near Lostine, Oreg.... 228

Lotus, Idaho, St. Maries River at... 140 

Lowell, Idaho, Loehsa River near.... 235

Selway River near.................231,232

Lower Jocko Lake, Mont............... 89

Lucerne, Wash., Railroad Creek

at........................152,419-422

McDonald Perry, Oreg., John Day River

at........................259,452-455

McDonald Reservoir, Mont............. 89

McKay Creek near Pendleton, Oreg..... 253

near Pilot Rock, Oreg.............. 252

McNary dam site...................54,pi.7,A

Magnitude and frequencies, flood....333-469

Magnitude and frequency of floods

In Columbia River Basin.......317-469

Malheur River near Drewsey, Oreg....435-437

Martin, Wash., Keeehelus Lake near... 163 

Yakima River near.................. 164

Maxvllle, Mont., Boulder Creek at.... 95

Flint Creek at..................... 91

Flint Creek near.................... 92

Meacham Creek, near Gibbon, Oreg.,

Itoatllla River above............ 248

Meadow Creek, near Lowell, Idaho,

Selway River above............. 231

Metallne Falls, Wash., Fend Orellle

River below Z Canyon, near.85,370-371 

Meteorologle and hydrologle

conditions..................... 15-37

Meteorology.......................... 15-21

Method, annual-flood................. 328

partial-duration-series...........328-329

Methods of analysis.................3^6-327

Methow River at Twlsp, Wash. ..,. .148,413-415 

near Carlton, Wash............148,pi.11,A

Methow River Basin, Wash., flood

magnitude and frequencies In..413-415 

gaglng-statlon records In.......... 148

Mill Creek (Colvllle River Basin)

near Colville, Wash............ 131
474 INDEX

Page

Mill Creek (Walla Walla River Basin)

at Walla Walla, Wash........... 244

near Walla Walla, Wash............. 243

Mill Creek (Wlllamette River Basin)

at Salem, Oreg................. 271

Milton, Oreg., North Pork Walla Walla

River near..................... 242

South Pork Walla Walla River near.. 241 

Mission Reservoir, Mont.............. 89

Mission Valley Reservoirs, Mont...... 88-89

Missoula, Mont., Clark Pork above.'78,360-362 

Clark Pork below...............79,362-364

Molalla River near Canby, Oreg....... 272

Monument, Oreg., North Pork John Day

River at....................... 262

Moody, near Biggs, Oreg., Deschutes

River at..................266,456-459

Moravia, Idaho, Deep Creek at....73,352-354

Moses Lake, Wash., Crab Creek near... 159 

Moses Lake at...................... 162

Moses Lake at Moses Lake, Wash....... 162

Moyie River at Eastport, Idaho....... 71

at Eileen, Idaho...............72,349-351

Mud Creek near Tamarack, Idaho....... 219

Naches, Wash., Tieton Reservoir near. IflO. 

Tieton River near.............176,181,182

Naches River below Tieton River,

near Naches, Wash.............. 176

Nevada Creek above reservoir, near

Pinn, Mont..................... 101

near Helmville, Mont............... 102

Nevada Creek Reservoir near Pinn.Mont. 87 

Newgate, British Columbia, Kootenay

River at....................... 57

Nicholson, British Columbia, Columbia

River at....................... 46

Nighthawk, Wash., Slmilkameen River

near......................147,409-412

Nile, Wash., American River near..... 179

Bumping Lake near.................. 177

Bumping River near................. 178

Nlnepipe Reservoir, Mont............. 89

North Powder, Oreg., Wolf Creek near. 194 

North Yamhill River near Pike, Oreg.. 272

Obsidian, Idaho, Alturas Lake Creek

near........................... 205

Salmon River near.................. 197

Okanogan River at Orovllle, Wash..... 145

near Tonasket, Wash...........146,407-409

Okanogan River Basin, Wash., flood 

magnitude and frequencies 

in............................407-412

gaglng-station records in.........144-147

Orovllle, Wash., Okanogan River at... 145

Osoyoos Lake near.................. 144

Osoyoos Lake near Orovllle, Wash..... 144

Ovando, Mont., Blackfoot River near.. 99 

Oxbow, Oreg., Snake River at......... 186

Pablo Reservoir, Mont................ 88-89

Panther Creek near Shoup, Idaho...... 209

Park Creek below Park Lake, -near

Coulee City, Wash.............. 161

Park Lake near Coulee City, Wash..... 162

near Coulee City, Wash., Park Creek

below.......................... 161

Parker, Wash., Yaklma River near..... 167

Partial-duration-series method......328-329

comparison with annual-flood

method........................329-330

Payette, Idaho, Payette River near... 189 

Payette River near Payette, Idaho.... 189

Payette River Basin, Idaho, gaglngstation records in............. 189

Pendleton, Oreg., McKay Creek near... 253 

Umatilla River at.................. 249

Pend Oreille Lake at Hope, Idaho..... 84

Pend Oreille River below Z Canyon,

near Metallne Palls, Wash..85,370-371 

Pend Oreille River Basin, IdahoMont. -Wash., flood magnitude 

and frequencies In............360-389

gaging-station records in..........78-127

smaller reservoirs in.............. 86

Personnel............................ 3-4

Peshastln, Wash., Wenatchee River at. 155 

Phllipsburg, Mont., East Pork Rock

Creek Reservoir near........... 86

Page

Phillpsburg, Mont., Middle Pork Rock

Creek near..................... 97

Trout Creek above main canal, near. 93 

Physical features of Columbia River

Basin.........................318-322

Picture Gorge, near Dayvllle, Oreg.,

John Day River at.............. 257

Pike, Oreg., North Yamhill River near 272 

Pilot Rock, Oreg., McKay Creek near.. 252 

Pine City, Oreg., Butter Creek near.. 255 

Pitt,- Wash., Kliokltat River near.... 267

Plain, Wash., Chiwawa River near..... 156

Wenatchee lake near................ 152

Wenatchee River at............154,422-425

Plains, Mont., Clark Pork near...82,368-369 

Plotting positions.................. 327-328

Poison, Mont., Plathead River

near......................115,377-378

Porthill, Idaho, Boundary Creek

near.......................76,357-359

Kootenai River at.................. 66

Long Canyon Creek near.......63,74,pl.9,B

Smith Creek near...............75,354-356

Portland, Oreg., flood scenes. .....10,pi.3

Willamette River at...............270-271

Positions, plotting.................327-328

Post Palls, Idaho, Spokane River at.136,401 

Potlatch Creek at Kendrick, Idaho.... 240

Powder River at Salisburg, Oreg...... 191

near Haines, Oreg.................. 192

near Robinette, Oreg............... 193

Powder River Basin, Oreg., gagingstation records in............191-194

Prairie City, Oreg., John Day River

at............................. 256

Strawberry Creek above Slide Creek,

near........................... 260

Precipitation........................ 21-35

1894 and 1948.....................26,pi.5

Prichard, Idaho, Coeur d'Alene River

near.......................... 132

Priest Lake at outlet, near Coolin,

Idaho......................... 125

Priest River at outlet of Priest Lake,

near Coolin, Idaho........126^387-389

near Priest River, Idaho........... 127

Probable error of flood-frequency

graph.........................330-331

Pudding River near Aurora, Oreg...... 273

Railroad Creek at Lucerne, Wash.152,419-422 

References, list..................... 469

Revelstoke, British Columbia,

Columbia River at.............. 47

Rieth, Oreg., Birch Creek at......... 254

Ritter, Oreg., Middle Pork John Day

River at....................... 264

Robinette, Oreg., Powder River near.. 193 

Rock Creek, Middle Pork, near Philipsburg , Mont..................... 97

near Darby, Mont................... 106

Rock Creek Canal near Darby, Mont.... 106

Rock Creek (East Pork)Reservoir near

Phllipsburg, Mont.............. 86

Rocky Pord Creek near Ephrata, Wash.. 161 

Rondowa, Oreg., Orande Ronde River

at.......................,222,442-445

Roslyn, Wash., Cle Elum Lake near.... 172

Cle Elum River near...............173-174

St. Joe River at Calder, Utah...139,403-406 

St. Maries River at Lotus, Idaho..... 140

St. Regis, Mont., Clark Pork at..81,364-367 

Salem, Oreg., Mill Creek at.......... 271

Willamette River at................ 270

Salisbury, Oreg., Powder River at.... 191

Salmon River at Salmon, Idaho........ 201

at Whitebird, Idaho...........204,440-442

below Valley Creek, at Stanley,

Idaho,......................... 198

below Yankee Pork, near Clayton.

Idaho.....................199,437-439

Middle Pork, near Cape Horn, Idaho. 210 

near Challls, Idaho................ 200

near Prench Creek, Idaho........... 203

near Obsidian, Idaho............... 197

near Shoup, Idaho.................. 202

South Pork, near Khox, Idaho....... 213

Yankee Pork, near Clayton, Idaho... 207
475

Page

Salmon River Basin, Idaho, gaging-station records in........197-219

Sandy River below Bull Run River,

near Bull Run, Oreg............ 269

Sandy River Basin, Oreg., gagingstation records in............. 269

Sauvies Island in Columbia River,

flood scene.................16,pi.4,A

Secesh River near Burgdorf, Idaho.... 217

Selway River above Meadow Creek,

near Lowell, Idaho............. 231

near Lowell, Idaho................. 232

Service Creek, Oreg., John Day River

at............................. 258

Shoup, Idaho, Panther Creek near..... 209 

Salmon River near.................. 202

Similkameen River near Nlghthawk,

Wash......................147,409-412

Skyland Creek near Essex, Mont....... 119

Slide Creek, near Prairie City, Oreg.,

Strawberry Creek above......... 260

Slocan River at Crescent Valley,

British Columbia............... 77

Smith Creek near Porthill, Idaho.75,354-356

Smyrna, Wash., Crab Creek near....... 160

Snake River at Oxbow, Oreg........... 186

at Weiser, Idaho................... 185

near Clarkston, Wash......187-188,428-431

Snake River Basin, Idaho-Oreg.-Wash., 

flood magnitude and frequencies in ...................428-448

gaglng-station records in.........185-240

Snake River main stem, Idaho-Oreg.- 

Wash., gaging-station records 

on............................185-188

Snow Creek near Leavenworth, Wash.,

Icicle Creek above............. 157

Soap Lake, Wash., Lenore Lake near.. . 162 

Soap Lake near..................... 162

Soap Lake near Soap Lake, Wash....... 162

Somers, Mont., Plathead Lake at...... 114

South Yamhlll River near Whiteson,

Oreg,.......................... 271

Southern Cross, Mont., Flint Creek

near........................... 90

Georgetown Lake near............... 86

Trout Creek near................... 9

Spalding, Idaho, Clearwater River at. 234

Spokane, Wash., Latah Creek at....... 142

Spokane River at..........137-138,402-403

Spokane River at Long Lake, Wash..... 138

at Post Palls, Idaho..............136,401

at Spokane, Wash..........137-138,402-403

Spokane River Basin, Idaho-Wash., 

flood magnitude and frequencies in...................397-406

gaging-station records in. ........132-143

Stage, records of....................46-277

Stage relations, Columbia River near

international boundary........315-316

Stages, flood crest.................306-315

summary of flood..................278-305

Stanley, Idaho, Salmon River at...... 198

Valley Creek at.................... 206

State ditch.......................54,pl.7,B

Stehekin River at Stehekln,

Wash....... .............. ..149,415-419

Stevensville, Mont., Burnt Pork

Creek near..................... 110

Stlllwater River near Whitefish,

Mont........................... 121

Strawberry Creek above Slide Creek,

near Prairie City, Oreg........ 260

Swan River near Big Pork, Mont..124,385-387

Sycamore, Oreg., Johnson Creek at.... 274

Tabor Reservoir, Mont................ 89

Tamarack, Idaho, Mud Creek near...... 219

Tamplco, Wash., North Pork Ahtanum

Creek near................183,426-428

South Pork Ahtanum Creek near...... 164

Tarklo, Mont., Clark Pork at......... 80

Teanaway River near Cle Elum, Wash... 175 

Temperature.......................... 37

The Dalles, Oreg., Columbia River

near.......................54,336-338

Tieton Canal, near Naohes, Wash.,

Tieton River at headworks of... 182

Page 

Tieton Dam, near Naches, Wash.,

iTieton River at................ 181

Tieton Reservoir near Naches, Wash... 180 

Tieton River at headworks of Tieton

Canal, near Naches, Wash........ 182

at Tieton Dam, near Naches, Wash... 181 

near Naches, Wash., Naches River

below.......................... 176

Tonasket, Wash., Okanogan River

near......................146,407-409

Touchet, Wash., Touchet River near... 247 

Touchet River, East Pork, near

Dayton, Wash................... 246

near Touchet, Wash................. 247

Trego, Mont., Portine Creek near..... 68

Trinidad, Wash., Columbia River at... 53 

Trout Creek above main canal, near

Philipsburg, Mont.............. 93

near Southern Cross, Mont.......... 94

Troy, Mont., Lake Creek near......... 69

Troy, Oreg., Qrande Ronde River at... 223 

Tualatin River near Willamette,

Oreg........................... 273

Twin Reservoir, Mont................. 88-89

Twisp, Wash., Methow River at...148,413-415 

Tygh Valley, Oreg., White River

below.........................459-462

Ukiah, Oreg., Camas Creek near....... 263

Umatilla, Oreg., ttoatilla River

near......................251,449-452

ttoatilla River above Meacham Creek,

near Gibbon, Oreg.............. 248

at Pendleton, Oreg................. 249

at Yoakum, Oreg.................... 250

near Omatilla, Oreg...........251,449-452

ttoatilla River Basin, Oreg., flood

magnitude and frequencies in..449-452 

gaging-station records in.........248-255

Umtanum, Wash., Yakima River at...... 166

Underwood, Wash., White Salmon River

near........................... 268

Union, Oreg., Catherine Creek near... 224

Valley Creek at Stanley, Idaho....... 206

at Stanley, Idaho, Salmon River

below.......................... 198

Vancouver, Wash., flood scene.....16,pl.4,B 

Vanport, Oreg., flood scenes.....2-3,pi.1,2 

Victor, Mont., Bear Creek near....... 109

Walla Walla, Wash., Blue Creek near.. 244 

Garrison Creek at.................. 245

Mill Creek at...................... 244

Mill Creek near.................... 243

Yellowhawk Creek at................ 245

Walla Walla River, North Pork, near

Milton, Oreg................... 242

South Pork, near Milton, Oreg...... 241

Walla Walla River Basin, Oreg.-Wash.,

gaging-station records in.....241-247

Wallowa, Qreg., Bear Creek near...... 229

Wallowa Palls power-plant tailrace

near Joseph, Oreg.............. 226

Wallowa River, East Pork, near

Joseph, Oreg................... 226

Warden, Wash., Crab Creek near....... 159

Wardner, British Columbia, Kootenay

River at....................... 56

Warren Creek near Warren, Idaho...... 218

Washougal River near Washougal, Wash. 270 

Washougal River Basin, Wash., gagingstation records in.'............ 270

Weiser, Idaho, Snake River at........ 185

Wenatchee Lake, Wash., Wenatchee -

River below.................... 153

Wenatchee Lake near Plain, Wash...... 152

Wenatchee River at Peshastin, Wash... 155 

at Plain, Wash................154,422-425

below Wenatchee Lake, Wash......... 153

Wenatchee River Basin, Wash., flood

magnitude and frequencies in..422-425 

gaging-station records in.........152-157

Whltebird, Idaho, Salmon River

at........................204,440-442

Whitebird Creek near..........234,pi.12,B

Whltebird Creek near Whitebird,

Idaho.....................234,pi.12,B
476

Page 

Whltefish, Mont., Stillwater River

near........................... 121

Whltefish Creek near Kallspell,

Mont......................122,383-384

White River below Tygh Valley, Oreg.459-462 

White Salmon River near Underwood,

Wash........................... 268

White Salmon River Basin, Wash.,

gaglng-station records in...... 268

Whiteson, Oreg., South Yamhill River

, near............................ 271

W13/lamette, Oreg., Tualatln River

near........................... 273

Wljlamette River at Portland, Oreg..270-271 

at Salem, Oreg..................... 270

Willamette River Basin, Oreg., gagingstation records in........... .270-274

WJ.llard, Wash., Little White Salmon

River at....................... 268

Willow Creek near Hall, Mont......... 96

Wind River near Carson, Wash......... 269

Wind River Basin, Wash., gaglngstation records in............. 269

Wolf Creek near North Powder, Oreg... 194

Page 

Yakima River at Cle Elum, Wash....... 165

at Klona, Wash..................... 168

at Umtanum, Wash................... 166

near Martin, Wash.................. 164

, near Parker, Wash.................. 16?

Yakima River Basin, Wash., flood

magnitude and frequencies in..426-428 

gaging-station re«erds in.........163-184

Yankee Pork, near Clayton, Idaho,

Salmon River below.............43,199

Yankee Pork Salmon River near

Clayton, Idaho................. 2C7

Yellow Pine, Idaho, Johnson Creek

at............................215-216

Yellowhawk Creek at Walla Walla,

Wash........................... 245

Yoakum, Oreg., Umatllla River at..... 250

Youngs River near Astoria, Oreg...... 277

Youngs River Basin, Oreg., gagingstation records in............. 277

Z Canyon, near Metallne Palls, Wash.,

Pend Oreille River below...85,370-371

o