UNITED STATES DEPARTMENT OF THE INTERIOR 

Harold L. Ickes, Secretary

GEOLOGICAL SURVEY 

W. E. W rat her, Director

Water-Supply Paper 916

SUMMARY OF RECORDS OF SURFACE WATERS 

OF UPPER COLUMBIA RIVER BASIN

IN MONTANA AND IDAHO 

1898-1938

BY

A. H. TUTTLE AND T. R. NEWELL

Prepared in cooperation with the States of 

MONTANA AND IDAHO

UNITED STATES

GOVERNMENT PRINTING OFFICE 

WASHINGTON : 1943

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

Price 30 cents

CONTENTS

Page

Introduction.............................................................. l

Cooperation............................................................... 1

Acknowledgments............................'............................... 2

Explanation of data....................................................... 2

Bibliography.............................................................. 3

Gaglng-station records.................................................... 16

Kootenai River Basin..........................;......................... 16

Kootenal River at Newgate, British Columbia........................... 16

Kootenai River near Rexford, Mont..................................... 18

Kootenai River at Libby, Mont......................................... 21

Kootenai River at Leonla, Idaho....................................... 26

Kootenai River at Katka, Idaho........................................ 29

Kootenai River at Bonners Ferry, Idaho................................ 31

Kootenai River near Copeland, Idaho................................... 34

Kootenai River at Port Hill, Idaho..................................... 36

Grave Creek near Fortine, Mont........................................ 39

Granite Creek near Llbby, Mont........................................ 39

Boulder Creek near Leonla, Idaho...................................... 40

Moyle River at Eastport, Idaho........................................ 43

Moyle River at Snyder, Idaho.......................................... 46

Moyle River at Eileen, Idaho.......................................... 49

Cow Creek near Bonners Ferry, Idaho................................... 52

Deep Creek at Moravia, Idaho............. I............................ 53

Snow Creek near Moravia, Idaho........................................ 56

Caribou Creek near Moravia, Idaho..................................... 57

Myrtle Creek near Bonners Ferry, Idaho................................ 58

Ball Creek near Bonners Ferry, Idaho.................................. 59

Trout Creek near Copeland, Idaho...................................... 60

Mission Creek at Copeland, Idaho...................................... 62

Rock Creek near Copeland, Idaho....................................... 63

Brush Creek near Copeland, Idaho...................................... 64

Parker Creek near Copeland, Idaho..................................... 65

Long Canyon Creek near Port Hill, Idaho............................... 66

Smith Creek near Port Hill, Idaho..................................... 68

Boundary Creek near Port Hill, Idaho.................................. 70

Pend Orellie River Basin................................................ 73

Clark Fork above Missoula, Mont......................................\ 73

Clark Fork at Missoula, Mont.......................................... 75

Clark Fork below Missoula, Mont....................................... 77

Clark Fork at St. Regis, Mont......................................... 80

Clark Fork near Plains, Mont.......................................... 85

Clark Fork near Heron, Mont........................................... 91

Racetrack Creek near Anaconda, Mont................................... 94

Middle Fork of Rock Creek near Philipsburg, Mont...................... 94

Rock Creek near Quigley, Mont......................................... 95

East Fork of Rock Creek near Philipsburg, Mont........................ 96

Ranch Creek near Quigley, Mont........................................ 97

Blackfoot River at Clearwater, Mont................................... 98

Blackfoot River near Bonner, Mont..................................... 99

Nevada Creek near Finn, Mont........................................... 100

North Fork of Blackfoot River near Ovanda, Mont....................... 101

Clearwater River at Clearwater, Mont.................................. 102

Rattlesnake Creek at Missoula, Mont................................... 102

West Fork of Bitterroot River near Darby, Mont........................ 103

Bitterroot River near Darby, Mont..................................... 104

Bitterroot River near Grantsdale, Mont................................ 104

Bitterroot River near Missoula, Mont.................................. 106

East Fork of Bitterroot River at Conner, Mont......................... 108

Skalkaho Creek near Hamilton, Mont.................................... 109

Blodgett Creek near KamiIton, Mont.................................... 109

Willow Creek near Corvallis, Mont..................................... no

Willow Creek at Anfinson Ranch, near Corvallis, Mont.................. 110

Bear Creek near Victor, Mont.......................................... Ill

Burnt Fork Creek near Stevensvllie, Mont.............................. ill

Lolo Creek near Lolo, Mont............................................. 112

St. Regis River near St. Regis, Mont.................................. 112

Flathead River at Flathead, British Columbia.......................... 113

Flathead River near Columbia Falls, Mont.............................. 115

Flathead River at Columbia Falls, Mont-............................... 119

Flathead River near Poison, Mont...................................... 121

\ III
IV CONTENTS

Gaging-station records Continued.

Pend Oreille River Basin Continued. Page

Middle Fork of Flathead River at Belton, Mont......................... 129

South Fork of Flathead River near Columbia Falls, Mont................ 132

Stillwater River near Whitefish, Mont................................. 136

Stillwater River near Kalispell, Mont................................. 137

Logan Creek at Tally Lake, near Whitefish, Mont....................... 138

Logan Creek near Whitefish, Mont...................................... 139

Whitefish Creek near Kalispell, Mont.................................. 140

Ashley Creek near Kila, Mont.......................................... 142

Ashley Creek near Kalispell, Mont..................................... 142

Swan River near Big Fork, Mont........................................ 144

Big Creek near Poison, Mont........................................... 148

Little Bitterroot River near Marion, Mont............................. 152

Little Bitterroot River near Hubbart, Mont............................ 153

Little Bitterroot River near Niarada, Mont............................ 154

Crow Creek near Ronan, Mont........................................... 155

Crow Creek at Lozeau's ranch, near Ronan, Mont........................ 157

Mud Creek near Ronan, Mont............................................ 158

Mission Creek near St. Ignatius, Mont................................. 158

Dry Creek near St. Ignatius, Mont..................................... 161

Post Creek at Fitzpatrick's ranch, near Ronan, Mont................... 163

Post Creek at Deschamp's ranch, near Ronan, Mont...................... 164

Post Creek near St. Ignatius, Mont.................................... 165

South Fork of Jocko River near Jocko, Mont............................ 166

Jocko River near Jocko, Mont.......................................... 167

Jocko River at Ravalli, Mont.......................................... 168

Middle Fork of Jocko River near Jocko, Mont........................... 169

North Fork of Jocko River near Jocko, Mont............................ 170

Falls Creek near Jocko, Mont.......................................... 171

Big Knife Creek near Jocko, Mont...................................... 171

Agency Creek near Jocko, Mont......................................... 173

Blodgett Creek near Jocko, Mont....................................... 174

Finley Creek near Jocko, Mont......................................... 174

East Finley Creek near Jocko, Mont.................................... 176

Indian ditch near Jocko, Mont......................................... 177

Valley Creek near Ravalli, Mont....................................... 178

Revais Creek near Dixon, Mont......................................... 178

Thompson River near Thompson Falls, Mont.............................. 180

"respect Creek near Thompson Falls, Mont.............................. 181

driest River at outlet of Priest Lake, near Coolin, Idaho............. 181

Priest River at Falk's ranch, near Priest River, Idaho................ 187

Priest River near Priest River, Idaho................................. 188

Priest River at Priest River, Idaho................................... 190

Spokane RU ar Basin..................................................... 191

Coeur d'Alene River at Prichard, Idaho................................ 191

Coeur d'Alene River at Enaville, Idaho................................ 191

Coeur d'Alene River near Cataldo, Idaho................................ 192

Spokane River at Post Falls, Idaho.................................... 197

North Fork of Coeur d'Alene River near Enaville, Idaho................ 203

St. Joe River at Avery, Idaho......................................... 204

St. Joe River at Calder, Idaho........................................ 205

St. Joe River near Calder, Idaho...................................... 210

St. Maries River at Lotus, Idaho...................................... 210

Index..................................................................... 215
SUMMARY OF RECORDS OF SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN 

IN MONTANA AND IDAHO, 1898-1938

By A. H. TUTTLE and T. R. NEWEXL

INTRODUCTION

The Geological Survey, United States Department of the Interior, began to 

collect records of stream flow In the upper Columbia River Basin In Montana in 

July 1898, when gaging stations were established on the BItterroot River near 

MIssoula, the Blackfoot River near Bonner, and the Clark Fork at MIssoula. The 

first gaging station In*Idaho was established on the Priest River, at the town 

of Priest River, In June 1903. The work was expanded with the establishment of 

additional stations each succeeding year, the chief interest In records of 

stream flow in earlier years being In their value In investigations of irrigation projects on public lands. The work has been continued and enlarged until 

by September 30, 1938, records for periods of time varying in length had been 

collected by the Geological Survey and cooperating agencies at 113 gaging stations, of which 59 were still In operation on that date.

The purpose of this report Is to bring together, i 1 one volume, figures of 

monthly and yearly discharge for all gaging stations at which records have been 

collected in the upper Columbia River Basin in Montana and Idaho prior to 

October 1. 1938. Details of these records are contained In 45 volumes that 

have been issued from time to time by the Geological Survey. The monthly and 

yearly discharge given herein will serve most of the needs for stream-flow 

data, and the bibliography (pp. 3-15) will facilitate reference to more detailed information. Figures previously published for some of the Items have 

been found to require revision or correction, and the revised or corrected 

figures are incorporated in this summary. Records for short periods not previously published have been estimated in order to complete the record for a year, 

if estimates for these periods could be made with reasonable accuracy.

COOPERATION

Since 1906 the Geological Survey has cooperated with the State engineer 

of Montana In the collection of stream-flow data. In 1909, the first appropriations for this work were made by the States of Montana and Idaho. Cooperative agreements have been entered Into annually with each of the two States 

since that time, except that the State of Idaho furnished no financial assistance during the period 1915-18. Since 1931 full cooperation has been maintained between the Geological Survey and the Dominion Water and Power Bureau,
2 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Department of Mines and Resources, Canada, in the operation of certain gaging 

stations on streams common to both the United States and Canada. The records 

from these stations, herein designated "international gaging stations," are 

collected in such a manner as to be equally acceptable and available in either 

country.

In the execution of the work other Federal bureaus and many municipal and 

private organizations have cooperated with the Geological Survey, either by 

furnishing data or by assisting in collecting data. Acknowledgment for cooperation by such agencies is given in the Geological Survey's annual series of

papers on surface water supply.

*

ACKNOWLEDGMENTS

The part of the manuscript consisting of records of stream flow in Montana 

was prepared by H. C. Eagle with the assistance of C. D. Bue, under the direction of A. H. Tuttle. The part consisting of records of stream flow in Idaho 

was prepared by E. Hazel Haugse, under the direction of T. R. Newell.

EXPLANATION OF DATA

In the tables of monthly discharge the column headed "Maximum11 gives the 

highest daily mean discharge and not the momentary discharge, when the water 

surface was at crest stage. Likewise, the column headed "Minimum11 gives the 

lowest daily mean discharge. Tiie column headed "Mean" gives the average flow 

during the month.

The monthly mean for a gaging station represents the flow passing the gage, 

but the discharge in second-feet per square mile and run-off in inches as computed from that mean may not reflect the normal characteristics of the drainage 

basin if the flow is regulated, if water is diverted around the gage, or if the 

flow has been depleted by irrigation. The two last-named items have not been 

computed for a gaging station at which existing conditions do not approximate 

natural conditions at that station or for areas over which the rainfall averages less than 20 inches yearly. Discharge in second-feet per square mile and 

run-off in inches for earlier years have been computed for the first time for 

some stations; for others the figures previously obtained for these two items 

have been revised on the basis of a more accurate determination of drainage 

area.

Many gaging stations on streams in the Irrigated areas are situated above 

most of the diversions from those streams, and therefore the discharge recorded 

does not show the water supply available for further development, as prior appropriations below the station must first be satisfied.
BIBLIOGRAPHY

The data in this report consist of records of monthly and yearly discharge 

In a form available for ready reference. If need arises for more Information 

than Is given herein, detailed results may readily be found by consulting the 

publications cited on the following pages.

Records of stream flow In the upper Columbia River Basin prior to those 

for 1911 were published on the basis of the calendar year. Beginning with the 

report for 1911, the records have been published on the basis of the water 

year, which ends September 30. The numbers In the column headed "Year," therefore, refer to either the calendar year or the water year, depending on the 

basis on which the publication cited was prepared. The records for October to 

December 1910 were duplicated when the change was made.

The water-supply papers and other publlcatlons^of the Geological Survey 

may be purchased from the Superintendent of Documents, Government Printing 

Office, Washington, D. C., who will, on application, furnish lists giving 

prices; or they may be consulted at the Geological Survey local offices In 

Helena, Mont., and Idaho Falls and Boise, Idaho, at the Geological Survey 

offices in other States, and at the public libraries In the principal cities.

Bibliography of stream-flow data In upper Columbia River Basin in Montana and Idaho

Publications of the Geological Survey are indicated by the following abbreviations: 

A, Annual Report; W,'Water-Supply Paper. An asterisk (*) indicates that the records in 

the publication so marked have been revised in a later publication. A dagger (t) indicates that the figures of discharge per square mile and run-off in inches have been revised on the basis of the latest determination of drainage area. A double dagger Ct) 

indicates that the records do not include those of monthly discharge.

Gaging station

Agency Creek near Jocko, Mont ...........

Ball Creek near Bonners Perry, Idaho. . . .

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

Year

1909

1910

1911

1912

1913

1914

1915

1916

1 -LoO-L Q^T 

1932

1933

1934

1935

1936

1937

1938

1916

1928

1929

1930

1931

1932

1933

1934

1 J,t?OO O^fl 

 i en 17 -Lyj. /

1918

1919-20

1921

1922

1923

1924-25

1926

1927

Publication

W 272, p. 103

W 292, p. 106

W 312, p. 10S

W 332, p. 112

W 362, p. 105

W 392, p. 87

W 412, p. 147

W 442, p. 108

W rroo T* T «IQ /(& < i p. J.O37

W 737, p. 127

W 752, p. 129

W 767, p. 123

W 792, p. 116

W 812, p. Ill

W 832, p. 118

W 862, p. 122

W 442, p. 85

W 672, p. 64

W 692, p. Ill

W 707, p. 115

W 722, p. 106

W 737, p. 95

W 752, p. 96

W 767, p. 91

W 862, p. 107

W 462, p. 81

W 482, p. 73

W 512, p. 129

W 532, p. 118

W 552, p. 117

W 572, p. 104

W 612, p. 90

W 632, p. 89

W 652, p. 64
SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Bibliography of stream-flow data in 

in Montana and Idahoupper Columbia River Basin -Continued

Gaging station

Big Creek near Poison, Mont. Continued.

Bitterroot River near Darby, Mont.......

Bitterroot River near Grantsdale, Mont..

Bitterroot River near Missoula, Mont....

Eitterroot River, East Fork of, at

Conner, Mont.

(Published as East Fork of Bitterroot

River near Darby prior to 1937. )

Bitterroot River, West Fork of, near

Darby, Mont.

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

Blackfoot River, North Fork of, near

Ovando, Mont.

Blodgett Creek near Hamilton, Mont......

Blodgett Creek near Jocko, Mont. ........

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

Year

1928

1929

1930

1931

1932

1 xyuy QflQ

1910

1911

1912

1913

1914

1915

1916

1937

1938

1902

1903

1904

1905

1906

1907

1898

1899

1900

1901

1903

1904

1910

1911

1912

1913

1914

1915

1937

1938

1911

1912

1913

1914

1916

1917

1 -L»7*sX OPT 

1922

1923

1898

1899

1900

1901

1903

1904

1905

1921

1922

1923

1938

1909

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

Publication

W 672, p. 88

W 692, p. 144

W 707, p. 148

W 722, p. 141

W 737, p. 129

W 272, p. 101

W 292, p. 103

W 312, p. 106

W 332, p. 110

W 362, p. 103

W 392, p. 86

W 412, p. 145

W 442, p. 107

W 832, p. 100

W 862, p. 103

W 85, p. 201

W 100, p. 408

,W 135, p. 35

W 178, p. 21

W 214, p. 20

W 252, p. 90

20th A, pt. 4, p. 492; Jw 28, pp.

168, 170

21st A, pt. 4, p. 419; $W 38, pp.

369; tw 39, p. 454

22nd A, pt. 4, p. 441; tw 51, pp.

434; tW 52, p. 522

tw 66, p. 131; W 75, p. 199

W 100, p. 406

W 135, p. 37

tW 292, p. 72

tW 312, p. 70

tW 332, p. 70

W 362, p. 64

W 392, p. 57

Jw 412, p. 115

W 832, p. 101

W 862, p. 104

W 312, p. 68

W 332, p. 68

W 362, p. 62

W 392, p. 56

W 442, p. 75

W 462, p. 73 (Fragmentary record.

W 532, p. 106

W 552, p. 99

W 572, p. 88

20th A, pt. 4, p. 491; ftv 28, pp.

168, 170

21st A, pt. 4, p. 416; Jw 38, pp.

363; tW 39, p. 454

22nd A, pt. 4, p. 433; tW 51, pp.

431; JW 52, p. 522

|W 66, pp. 130, 177; W 75, p. 198

W 100, p. 410

W 135; p. 33

W 178, p. 19

W 532, p. 107

W 552, p. 101

W 572, p. 89

W 862, p. 105

W 272, p. 105

W 672, p. 57

W 692, p. 104

W 707, p. 106

W 722, p. 98

W 737, p. 87

W 752, p. 88

W 767, p. 83

W 792, p. 86

W 812, p. 81

W 832, p. 83

W 862, p. 85

*163,

368,

433,

)

163,

362,

430,
BIBLIOGRAPHY

Bibliography of stream-flow data In upper Columbia River Basin 

In Montana and Idaho--Continued

Gaging station

Boundary Creek near Port Hill, Idaho....

Burnt Pork Creek near Stevensvllle,

Mont.

Caribou Creek near Moravia, Idaho.......

Clark Fork at St. Regls, Mont. ..........

Year

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1928

1929

1930

1931

1932

1933

1934

1920

1921

1922

1923

1924

1928

1929

1930

1931

1932

1933

1934

1 ±y£f^y QOQ 

1930

1931

1932

1933

1934

1935

1936

1937

1938

T _Loyo QQfl

1899

1900

1901

1902

1903

1904

1905

1906

1907

1911

1912

1913

1914

1915

1916

1917

1918

1919-20

1921

1922

1923

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1930

1931

1932

W 672,

W 692,

W 707,

W 722,

W 737,

W 752,

W 767,

W 792,

W 812,

W 832,

W 862,

W 672,

W 692,

W 707,

W 722,

W 737,

W 752,

W 767,

W 512,

W 532,

W 552,

W 572,

W 592,

W 672,

W 692,

W 707,

W 722,

W 737,

W 752,

W 767,

W

CQO \}y£f f

W 707,

W 722,

W 737,

W 752,

W 767,

W 792,

W 812,

W 832,

W 862,

20th A

169,

21st A

366,

22nd A

433;

tW 66,

W 85,

W 100,

W 135,

W 178,

W 214,

W 252,

W 312,

W 332,

W 362,

W 392,

W 412,

W 442,

W 462,

W 482,

W 512,

W 532,

W 552,

W 572,

W 692,

W 707,

W 722,

W 737,

W 752,

W 767,

W 792,

W 812,

W 832,

W 862,

W 707,

W 722,

W 737,

Publication

p. 72

p. 119

p. 123

p. 114

p. 103

p. 104

p. 99

p. 92

p. 87

p. 89

p. 91

p. 68

p. 115

p. 119

p. 110

p. 99

p. 100

p. 95

p. 123

p. 112

p. 107

p. 94

p. 92

p. 62

p. 109

p. 113

p. 104

p. 93

p. 94

p. 89

p. 120

p. 124

p. 115

p. 104

p. 105

p. 100

p. 93

p. 88

p. 90

p. 92

, pt. 4, p. 491; $W 28, pp.

170

, pt. 4, p. 418; $W 38, pp.

367; pf 39, p. 454

, pt. 4, p. 435; $W 51, pp.

JW52, p. 522

pp. 131, 177; W 75, p. 198

p. 199

p. 403

p. 28

p. 16

p. 22

p. 83

D. 59

P. 59

p. 54

p. 49

p. 106

p. 68

p. 65

p. 62

p. Ill

p. 88

p. 89

p. 78

p. 121

p. 126

p. 117

p. 106

p. 107

p. 102

p. 95

p. 90

p. 92

p. 94

p. 125

p. 116

p. 105

163

365

432
SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Bibliography of stream-flow data In upper Columbia River Basin 

in Montana and Idaho--Continued

Gaging station

Clark Fork below Missoula, Mont. Con. . .

Clear-water River at Clearwater, Mont....

Coeur d'Alene River at Enavllle, Idaho..

Coeur d'Alene River at Prichard, Idaho..

Coeur d'Alene River near Cataldo, Idaho.

Coeur d'Alene River, North Fork of, near

Enaville, Idaho.

Year

1933

1934

1935

1936

1937

1938

1 QQO OO xy&o~&i7

1930

1931

1932

1933

1934

1935

1936

1937

1938

-1 QT T

J.t?XX

191*2

1913

1914

1915

1916

1917

1918

1919-20

1921

1922

3923

1924

1925

1526

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1921

1922

1923

1911

1912

1913

1912

1913

1914

1911

1912

1913

1920-21

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1912

1913

Publication

W 752, p. 106

W 767, p. 101

W 792, p. 94

W 812, p. 89

W 832, p. 91

W 862, p. 93

W 692, p. 123

W 707, p. 128

W 722, p. 119

W 737, p. 108

W 752, p. 109

W 767, p. 104

W 792, p. 97

W 812, p. 92

W 832, p. 94

W 862, p. 96

W 312, p. 61

W 332, p. 61

W 362, p. 55

W 392, p. 50

W 412, p. 107

W 442, p. 69

W 462, p. 67

W 482, p. 63

W 512, p. 114

W 532, p. 89

W 552, p. 91

W 572, p. 80

W 592, p. 80

W 612, p. 76

W 632, p. 76

W 652, p. 53

W 672, p. 73

W 692, p. 122

W 707, p. 127

W 722, p. 118

W 737, p. 107

W 752, p. 108

W 767, p. 103

W 792, p. 96

W 812, p. 91

W 832, p. 93

W 862, p. 95

W 532, p. 108

W 552, p. 102

W 572, p. 90

W 312, p. 126

W 332, p. 141

W 362, p. 128

W 332, p. 139

W 362, p. 127

W 392, p. 106

W 312, p. 128

W 332, p. 142

W 362, p. 130

W 532, p. 147

W 552, p. 127

W 572, p. 121

W 592, p. 109

W 612, p. 98

W 632, p. 97

W 652, p. 69

W 672, p. 94

W 692, p. 152

W 707, p. 159

W 722, p. 153

W 737, p. 142

W 752, p. 141

W 767, p. 134

W 792, p. 126

W 812, p. 121

W 832, p. 130

W 862, p. 134

W 332, p. 144

W 362, p. 140
BIBLIOGRAPHY

Bibliography of stream-flow data In upper Columbia River Basin 

In Montana and Idaho Continued

Gaging station

Crow Creek at Lozeau's ranch near Ronan,

Mont.

Bast Plnley Creek near Jocko, Mont......

Plathead River at Columlla Palls, Mont..

Year

1928

1929

1930

1931

1932

1933

1934

1911

1912

1913

1914

1915

1916

1906

1907-8

1909

1910

1911

1912

1913

1914

1915

1916

1917

1 Q*?O X9j£O

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1908

1909

1910

1911

1912

1913

1914

1915

1916

1909

1910

1911

1912

1913

1914

1915

1 Q1 O J.«7J.£

1913

1914

1915

i j.y\jv ono

1910

1911

1912

1913

1914

1915

1922

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

Publication

W 672, p. 59

W 692, p. 106

W 707, p. 110

W 722, p. 101

W 737, p. 90

W 752, p. 91

W 767, p. 86

W 312, p. 94

W 332, p. 93

W 362, p. 84

W 392, p. 72

W 412, p. 131

W 442, p. 93

W 214, p. 25

W 252, p. 97

W 272, p. 86

W 292, p. 90

W 312, p. 92

W 332, p. 92

W 362, p. 82

W 392, p. 71

W 412, p. 129

W 442, p. 91

W 462, p. 83

W 672, p. 60

W 692, p. 107

W 707, p. Ill

W 722, p. 102

W 737, p. 91

W 752, p. 92

W 767, p. 87

W 792, p. 89

W 812, p. 84

W 832, p. 86

W 862, p. 88

W 252, p. 105

W 272, p. 92

W 292, p. 96

W 312, p. 97

W 332, p. 97

W 362, p. 89

W 392, p. 76

W 412, p. 135

W 442, p. 96

W 272, p. 108

W 292, p. Ill

W 312, p. 112

VI 332, p. 117

W 362, p. 110

W 392, p. 90

W 412, p. 149

W 332, p. 106

W 362, p. 102

W 392, p. 84

W 412, p. 144

W 272, p. 107

W 292, p. 110

W 312, p. 110

W 332, p. 114

W 362, p. 107

W 392, p. 89

W 412, p. 148

W 552, p. 109

W 672, p. 76

W 692, p. 131

W 707, p. 135

W 722, p. 125

W 737, p. 114

W 752, p. 115

W 767, p. Ill

W 792, p. 105

W 812, p. 100

W 832, p. 104

W 862, p. 110
SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Bibliography of stream-flow data in upper Columbia River Basin 

in Montana and Idaho Continued

Gaging station

Flathead River at Plathead, British

Columbia.

(Published as Flathead River near

Trail Creek, Mont., prior to 1935.)

Plathead River near Columbia Falls,

Mont.

Flathead River, Middle Pork of, at

Belton, Mont.

Flathead River, South Pork of, near Columbia Falls, Mont.

Year

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1911

1912

1913

1914

1915

1916

1917

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1907-8

1909

1910

1911

1912

1913

1914

1915

1916

1917

1918

1919-20

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1911

1912

1913

1914

1915

1916

1917

1918

1919-20

1921

1922

1923

1S29

1930

1931

1932

1933

1911

1912

1913

1923

1924

1925

Publication

W 692, p. 129

W 707, p. 133

W 722, p. 123

W 737, p. 112

W 752, p. 113

W 767, p. 109

W 792, p. 103

W 812, p. 98

W 832, p. 102

W 862, p. 108

W 312, p. 75

W 332, p. 76

1HI 362, p. 69

W 392, p. 62

W 412, p. 119

W 442, p. 78

W 462, p. 76

W 692, p. 130

W 707, p. 134

W 722, p. 124

W 737, p. 113

W 752, p. 114

mi 767, p. 110

W 792, p. 104

W 812, p. 99

W 832, p. 103

W 862, p. 109

W 252, p. 92

W 272, p. 79

W 292, p. 81

W 312, p. 80

W 332, p. 81

mi 362, p. 72

W 392, p. 64

W 412, p. 12~1

W 442, p. 81

W 462, p. 78

W 482, p. 69

W 512, p. 125

W 532, p. 115

W 552, p. Ill

W 572, p. 98

mi 592, p. 94

W 612, p. 85

«W 632, p. 85; W 652, p. 59

W 652, p. 59

W 672, p. 83

W 692, p. 138 .

W 707, p. 142

W 722, p. 132

*HI 737, p. 121; W 752, p. 122

W 752, p.- 122

W 767, p. 118

mi 792, p. 112

W 812, p. 106

W 832 p. 113

W 862, p. 117

W 312, p. 83

W 332, p. 83

W 362, p. 74

W 392, p. 65

mi 412, p. 123

W 442, p. 82

W 462, p. 79

mi 482, p. 71

W 512, p. 127

W 532, p. 116

W 552, p. 113

W 572, p. 100

W 692, p. 139

W 707, p. 143

W 722, p. 133

W 737, p. 122

W 752, p. 124

W 312, p. 84

W 332, p. 86

W 362, p.. 77

W 572, p. 101

W 592, p. 96

mi 612, p. 87
BIBLIOGRAPHY

Bibliography of stream-flow data in upper Columbia River Basin 

In Montana and Idaho Continued

Gaging station

Plathead River, South Pork of, near Columbia Falls, Mont. --Continued.

Jocko River near Jocko, Mont. ...........

Jocko River, Middle Fork of, near Jocko,

Mont.

Jocko River, North Fork of, near Jocko,

Kont.

Jocko River, South Fork of, near Jocko,

Mont.

Kootenai River at Bonners Ferry, Idaho..

Kootenai River at Katka, Idaho. .........

Year

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

~\ Q 1^ 1^ 

.LoOO

1936-37

1S38

1923

1924

1909

1910

1911

1912

1913

1914

1915

1916

1907-8

1909

1910

1911

1909

1910

1911

1912

1913

1914

1915

1916

1918

1919

1912

1913

1914

1915

1912

1913

1914

1915

1912

1913

1914

1915

1904

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1928

1929

1930

1931

1932

1933

1928

1929

1930

1931

1932

Publication

W 632, p. 86

W 652, p. 62

W 672, p. 84

W 692, p. 140

W 707, p. 144

W 722, p. 134

W 737, p. 123

W 752, p. 125

W 767, p. 119

W 792, p. 113

W 812, p. 107

W 832, p. 114

W 862, p. 118

W 752, p. 87

W 832, p. 82

W 862, p. 84

W 572, p. 76

W 592, p. 79

W 272, p. 110

W 292, p. 114

W 312, p. 114

W 332, p. 118

W 362, p. Ill

W 392, p. 92

W 412, p. 151

W 442, p. 112

W 252, p. Ill

W 272, p. 99

W 292, p. 101'

W 312, p. 104

W 272, p. 97

W 292, p. 99

W 312, p. 102

W 332, p. 102

W 362, p. 95

W 392, p. 80

W 412, p. 139

W 442, p. 101

W 482, p. 74

W 512, p. 132

W 332, p. 109

W 362, p. 98

W 392, p. 81

W 412, p. 141

6th biennial report, Montana State

Engineer, p. 87

W 362, p. 100

W 392, p. 83

W 412, p. 142

*W 332, p. 108; W 362, p. 93

W 362, p. 93

W 392, p. 78

W 412, p. 138

Jw 135, p. 25

W 672, p. 49

W 692, p. 92

W 707, p. 92

W 722, p. 90

W 737, p. 77

W 752, n.' 78

W 767, p. 75

W 792, p. 77

W 812, p. 73

W 832, p. 73

W 862, p. 75

W 672, p. 47

W 692, p. 90

W 707, p. 90

W 722, p. 88

W 737, p. 75

W 752, p. 76

W 672, p. 46

W 692, p. 89

W 707, p. 89

W 722, p. 87

W 737, p. 74
10 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Bibliography of stream-flow data in upper Columbia River Basin 

in Montana and Idaho Continued

Gaging station

Kootenai River at Leonia, Idaho Con....

Kootenai River at Lib'by, Mont. ..........

Kootenai River at Newgate, British

Columbia.

Kootenai River at Port Hill, Idaho......

Kootenai River near Copeland, Idaho.....

Little Bitterroot River near Hubbart,

Mont.

Year

1933

1934

1935

1936

1937

1938

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920-21

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1931-34

1935

1936

1937

1938

1904

1928

1929

' 1930

1931

1932

1933

1934

1935

1936

1937

1938

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1909

1910

1911

1912

1913

1914

1915

1916

Publication

W 752, p. 75

W 767, p. 73

W 792, p. 75

W 812, p. 71

W 832, p. 71

W 862, p. 73

tW 312, p. 52

tW 332, p. 52

tW 362, p. 47

tW 392, p. 44

tW 412, p. 101

tW 442, p. 62

tW 462, p. 64

fW 482, p. 60

tW 512, p. 107

tW 532, p. 84

tW 552, p. 85

tW 572, p. 74

tW 592, p. 77

tW 612, p. 75

tW 632, p. 74

tW 652, p. 50

tW 672, p. 45

tW 692, p. 88

tW 707, p. 88

tW 722, p. 86

tW 737, p. 73

tW 752, p. 74

tW 767, p. 72

tW 792, p. 74

tW 812, p. 70

W 832, p. 70

W 862, p. 72

W 767, p. 67

W 792, p. 72

W 812, p. 68

W 832, p. 68

W 862, p. 70

"f"W ±n 1 J.OO *^C1 y r» p« PA J&O

W 672, p. 55

W 692, p. 102

W 707, p. 104

W 722, p. 96

W 737, p. 84

W 752, p, 85

W 767, p. 81

W 792, p. 84

W 812, p. 79

W 832, p. 80

W 862, p. 82

JW 672, p. 53

W 692, p. 99

W 707, p. 100

W 722, p. 94

W 737, p. 81

W 752, p. 82

W 767, p. 79

W 792, p. 81

W 812, p. 77

W 832, p. 77

W 862, p. 79

W 692, p. 87

W 707, p. 87

W 722, p. 85

W 737, p. 72

W 752, p. 73

W 767, p. 71

W 792, p. 73

W 812, p. 69

W 832, p. 69

W 862, p. 71

W 272, p. 82

W 292, p. 88

W 312, p. 90

W 332, p. 89

W 362, p. 80

W 392, p. 69

W 412, p. 127

W 442, p. 88
BIBLIOGRAPHY 11

Bibliography of stream-flow data in 

in Montana and Idaho

upper Columbia River Basin 

--Continued

Caging station

Little Bitterroot River near Marion,

Mont.

Little Bitterroot River near Niarada,

Mont. (Published as Little Bitterroot

River near Dayton prior to 1916.)

Logan Creek at Tally Lake, near Whitefish, Mont.

Long Canyon Creek near Port Hill, Idaho.

Mission Creek near St. Ignatius, Mont...

Moyie River at Eas tport , Idaho. .........

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

Year

1910

1911

1912

1913

1914

1915

1916

1908

1909

1917

1931-32

1935

1954

1936

1937

1938

1 xyox Q^T

-\Q-\O 

J.%fj.&

1913

1914

1915

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1928

1929

1930

1931

1932

1933

1934

1906

1907-8

1909

1910

1911

1912

1913

1914

1915

1916

1917

1929-30

1931

1932

1933

1934

1935

1936

1937

1938

1926-27

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1912

1913

1914

1915

1916

Publication

W 292, p. 86

W 312, p. 87

W 332, p. 88

W 362, p. 79

W 392, p. 68

W 412, p. 125

W 442, p. 86

W 252, p. 96

W 272, p. 84

W 462, p. 82

W 737, p. 125

W 752, p. 127

W 767, p. 121

W 812, p. 109

W 832, p. 116

W 862, p. 120

W

I7OO .« T ZI7

\CrC,f P« -LG I

W 332, p. 72

W 362, p. 65

W 392, p. 59

W 412, p. 116

W 672, p. 70

W 692» p. 117

W 707, p. 121

W 722, p. 112

W 737, p. 101

W 752, p. 102

W 767, p. 97

W 792, p. 90

W 812, p. 85

W 832, p. 87

W 862, p. 89

W 672, p. 66

W 692, p. 113

W 707, p. 117

W 722, p. 108

W 737, p. 97

W 752, p. 98

W 767, p. 93

W 214, p, 27

W 252, p. 101

W 272, p. 90

W 292, p. 94

W 312, p. 95

W 332, p. 95

W 362, p. 86

W 392, p. 74

W 412, p. 133

W 442, p. 95

W 462, p. 85

W 707, p. 107

W 722, p. 99

W 737, p. 88

W 752, p. 89

W 767. p. 84

W 792, p. 87

W 812, p. 82

W 832, p. 84

W 862, p. 86

W 652, p. 51

W 672, p. 58

W 692, p. 105

W 707, p. 109

W 722, p. 100

W 737, p. 89

W 752, p. 90

W 767, p. 85

W 792, p. 88

W 812, p. 83

W 832, p. 85

W 862, p. 87

W

'Z'ZO n ^*7 OO&f U« Of

W 362, p. 52

W 392, p. 47

W 412, p. 104

W 442, p. 66
12 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Bibliography of stream-flow data in 

in Montana and Idaho

upper Columbia River Basin 

--Continued

Gaging station

Moyie River at Snyder, Idaho- -Continued.

Myrtle Creek near Bonners Perry, Idaho..

Post Creek at Deschamp's ranch, near

Ronan, Mont.

Post Creek at Fitzpatrick' s ranch near

Ronan, Mont. (Above Uorth Fork of

Post Creek. )

Post Creek near St. Ignatius, Mont.

(Below North Pork of Post Creek.)

Priest River at Falk's ranch near Priest

River, Idaho.

Priest River at outlet of Priest Lake

near Coolin, Idaho.

Priest River at Priest River, Idaho.....

Year

1919-20

1921

1922

1923

1908

1909

1910

1928

1929

1930

1931

1932

1933

1934

1934

1935

1936

1937

1938

1928

1929

1930

1931

1932

1933

1934

1911

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

1911

1912

19 ;i

1912-13

1914

1915

1916

1917

1918-20

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1903-5

1911

1923

1929

1930

Publication

W 512, p. 109

W 532, p. 86

W 552, p. 87

W 572, p. 77

W 252, p. 100

W 272, p. 88

W 292, p. 92

W 672, p. 63

W 692, p. 110

W 707, p. 114

W 722, p. 105

W 737, p. 94

W 752, p. 95

W 767, p. 90

W 767, p. 108

W 792, p. 102

W 812, p. 97

W 832, p. 99

W 862, p. 102

W 672, p. 69

W 692, p. 116

W 707, p. 120

W 722, p. Ill

W 737, p. 100

W 752, p. 101

W 767, p. 96

W 312, p. 98

W 214, p. 28

W 252, p. 107

*W 252, p. 107; W 272, p. 94

W 272, p. 94

W 292, p. 97

W 312, p. 98

W 332, p. 99

W 362, p. 90

W 392, p. 77

W 412, p. 136

W 442, p. 98

W 462, p. 87

W 312, p. 120

W 332, p. 126

Jw 332, p. 125

W 362, p. 118

W 392, p. 97

W 412, p. 155

W 442, p. 117

W 462, p. 89

W 512, p. 135

W 532, p. 120

W 552, p. 119

W 572, p. 106

W 592, p. 99

W 612, p. 92

W 632, p. 91

W -652, p. 65

W 672, p. 90

W 692, p. 146

W 707, p. 150

W 722, p. 143

W 737, p. 131

W 752, p. 132

W 767, p. 126

W 792, p. 119

W 812, p. 114

W 832, p. 121

W 862, p. 125

W 572, p. 108

W 312, p. 122

W 572, p. 108

W 692, p. 147

W 707, p. 151
BIBLIOGRAPHY 13

Bibliography of stream-flow data in 

in Montana and Idahoupper Columbia River Basin  Continued

Gaging station

Priest River near Priest River, Idaho... *

Prospect Creek near Thompson Falls,

Mont.

Racetrack Creek near Anaconda, Mont.....

Rock Creek, East Fork of, near Philipsburg, Mont.

Rock Creek, Middle Fork of, near

Philipsburg, Mont.

Year

1931

1S32

1933

1954

1936

1936

1937

1938

1911

1911

1912

1922

1923

1924

1925

1926

1927

1899

1911

1912

1913

1914

1915

1916

1918

1919

1928

1929

1930

1931

1932

1933

1934

1912

1922

1923

1924

1925

1926

1927

1935

1936 

1937

1938

1937-38

1911-12

1913

1914

1915

1916

1917

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

Publication

W 722, p. 144

W 737, p. 132

W 752, p. 133

W 767, p. 127

W 792, p. 120

W 812, p. 116

W 832, p. 122

W 862, p. 126

W 312, p. 118

W 312, p. 63

W 332, p. 63

W 552, p. 98

W 572, p. 86

W 592, p. 87

W 612, p. 82

W 632, p. 82

W 652, p. 57

21st A, pt. 4, p. 417; JW38, p. 364;

$W 39, p. 454

W 312, p. 115

W 332, p. 120

W 362, p. 114

W 392, p. 94

W 412, p. 152

W 442, p. 114

W 482, p. 76

W 512, p. 133

W 672, p. 67

W 692, p. 114

W 707, p. 118

W 722, p. 109

W 737, p. 98

W 752, p. 99

W 767, p. 94

W 332, p. 66; W 362, p. 62

W 552, p. 97

W 572, p. 84

W 592, p. 85

W 612, p. 81

W 632, p. 80

W 652, p. 56

W 792, p. 101

W 812, p. 96 

W 832, p. 98

W 862, p. 101

W 862, p. 100

W 332, p. 131

W 362, p. 141

W 392, p. 114

W 412, p. 173

W 442, p. 132

W 462, p. 106

W 512, p. 160

W 532, p. 144

W 552, p. 137

W 572, D. 130

W 592, p. 118

W 612, p. 107

W 632, p. 106

W 652, p. 75

W 672, p. 101

W 692, p. 157

W 707, p. 165

W 722, p. 159

W 737, p. 148

W 752, p. 147

W 767, p. 139

W 792, p. 131

W 812, p. 126

W 832, p. 135

W 862, p. 139

527283 O - 43 - 2
14 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Bibliography of stream-flow data In upper Columbia River Basin 

in Montana and Idaho Continued

Gaging station

St. Regls River near St. Regis, Mont...

Smith Creek near Port Hill, Idaho

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

Stlllwater River near Kallspell, Mont..

Year

1 J.*7J.J. Q1 1 1 ±.Ci£>

1 ±y±± Q1 1 19 ±*s

1920

1921

1922

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

19S5

1936

1937

1938

1911

1912

1913

1914

1915

1916-17

1920-21

1922

1923

1924

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1928

1929

1930

1931

1932

1933

1934

1913

1914

1915

1916

1917

1918-19

1920

1921

1922

1923

1924

.1925

1926

1927

1928

1929

1930

1S31

1932

1933

1934

1935

1936

1937

1938

1922

1928

1929

1930

1931

Publication

11V 332, p. 134

W 332, p. 136

W 512, p. 161

W 532, p. 145

W 552, p. 139

W 572, p. 132

W 592, p. 120

W 612, p. 109

W 632, p. 109

W 652, -p. 76

W 672, p. 102

W 692, p. 158

W 707, p. 166

W 722, p. 160

W 737, p. 149

W 752, p. 148

W 767, p. 140

W 792, p. 132

W 812, p. 127

W 832, p. 136

W 862, p. 140

W 312, p. 73

W 332, p. 74

W 362, p. 66

W 392, p. 60

W 412, p. 117

W 462, p. 73

W 532, p. 109

W 552, p. 104

W 572, p. 92

W 592, p. 89

W 672, p. 71

W 692, p. 118

W 707, p. 122

W 722, p. 113

W 737, p. 102

W 752, p. 103

W 767, p. 98

W 792, p. 91

W 812, p. 86

W 832, p. 88

W 862, p. 90

W 672, p. 61

W 692, p. 108

W 707, p. 112

W 722, p. 103

W 737, p. 92

W 752, p. 93

W 767, p. 88

W 362, p. 131

W 392, p. 109

W 412, p. 167

W 442, p. 126

W 462, p. 101

W 512, p. 151

W 512, p. 151

W 532, p. 130

W 552, p. 131

W 572, p. 124

W 592, p. 112

W 612, p. 101

W 632, p. 101

W 652, p. 71

W 672, p. 96

W 692, p. 153

W 707, p. 161

W 722, p. 155

W 737, p. 144

W 752, p. 143

W 767, p. 136

W 792, p. 128

W 812, p. 123

W 832, p. 132

W 862, p. 136

W 552, p. 114

W 572, D. 85

W 692, p. 141

W 707, p. 145

W 722, p. 136
BIBLIOGRAPHY 15

Bibliography of stream-flow data in upper Columbia Rlvar Basin 

In Montana and Idaho Continued

Gaging station

Stillwater River near Whlteflsh, Mont..

Thompson River near Thompson Palls,

Mont.

Whlteflsh Creek near Kallspell, Mont...

Willow Creek at Anflnson Ranch, near

Corvallis, Mont.

Willow Creek near Corvallls, Mont......

Year

1931

1932

1933

1934

1935

1936

1937

1938

T itSCiCi Q99

1923

1924

1925

1926

1927

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1911

1 QOfl 1*7&O

1929

1930

1931

1932

1933

1934

1909

1910

1906

1928

1929

1930

1931

1932

1933

1934

1935

1936

1937

1938

1938

1920

1921

1922

1923

1924

Publication

W 722, p. 135

W 737, p. 124

W 752, p. 126

W 767, p. 120

W 792, p. 114

W 812, p. 108

W 832, p. 115

W 862, p. 119

W 552, p. 116

W 572, p. 103

W 592, p. 97

W 612, p. 88

W 632, p. 88

W 652, p. 63

W 672, p. 87

W 692, p. 143

W 707, p. 147

W 722, p. 140

W 737, p. 128

W 752, p. 130

W 767, p. 124

W 792, p. 117

W 812, p. 112

W 832, p. 119

W 862, p. 123

W 312, p. 116

W 672, p. 65

W 692, p. 112

W 707, p. 116

W 722, p. 107

W 737, p. 96

W 752, p. 97

W 767, p. 92

W

orro r\ T ~\ & Ci I Ci f P J- -L&

W 292, p. 115

$W 214, p. 25

W 672, p. 86

W 692, p. 142

W 707, p. 146,

W 722, p. 138

W 737, p. 126

W 752, p. 128

W 767, p. 122

W 792, p. 115

W 812, p. 110 .

W 832, p. ll7

W 862, p. 121

W 862, p. 106

W 512, p. 121

W 532, p. Ill

W 552, p. 106

W 572, p. 93

W 592, p. 90
16 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

GAGING-STATION RECORDS 

KOOTENAI RIVER BASIN

Kootenai River at Newgate, British Columbia 

(International gaging station)

Location.- Two staff gages, one on main r'ver and one on slough, lat. 49°01', long. 115°

10', at highway bridges, 0.7 mile nc tnwest of Newgate, British Columbia, and 0.9 mile

north of the international boundary. 

Drainage area.- 7,660 square miles. 

Records available.- October 1930 to September 1938. 

Extremes.- Maximum discharge observed, 83,500 second-feet June 18, 1933; minimum, 994

second-feet Feb. 7, 1936. 

Remarks.- Records give total flow of main channel and slough. No diversion or regulation.

This station is one of the international gaging stations maintained by Canada under

agreement with the United States.

Monthly discharge of Kootenai River at Newgate, British Columbia

Discharge in second-feet

Maximum square 

mile

Acre-feet

1930-31

October...........

November.:........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year........

1931-32 

October...........

November..........

December...........

January............

February...........

March..............

April........ ......

May......... .......

June...............

July..............

August.............

September..........

The year........

1932-33 

October............

November...........

December...........

January............

February...........

Harch..............

April..............

Hay................

June..............

July..............

August............

September. .........

The year........

210

110

500

300

200

520

980

800

400

700

830

720

3,170

2,270

1,780

1,500

1,620

1,710

1,990

7,270

14,500

7,000

4,200

3,600

3,670

2,720

2,120

1,970

1,870

1,990

2,880

16,600

20,700

9,880

5,350

4,340

0.48

.36

.28

.26

.24

.26

.38

2.17

2.70

1.29

.70

.57

0.55 -.40

.32

.30

.25

.30

.42

2.50

3.01

1.49

.81

.64

32,800 1,500 6,190

3,540

3,390

9,950

5,900

9,020

51,300

60,500

30,000

9,900

7,290

2,720

2,710

3,530

9,060

30,900

10,400

7,060

3,980

3,020

2,440

2,300

1,800

2,400

3,260

6,570

27,500

43,900

16,500

8,090

5,310

.39

.32

.30

.23

.31

.43

.86

3.59

5.73

2.15

1.06

.69

.45

.36

.35

.26

.33

.50

.96

4.14

6.39

2.49

1.22

.77

60,500 10,300 1.34 18.22

4,920

4,920

5,180

3, 260

2,470

2,760

19,300

45,300

83,5'00

39,200

13,800

11,000

3,690

3,410

1,200

1,790

1,600

2,160

2,720

13,100

28,000

13,800

8,630

6,350

4,190

4,080

2,530

2,610

2,190

2,360

5,910

22,400

49,900

25,300

10,400

7,550

.55

.53

.33

.34

.29

.31

.77

2.92

6.51

3.30

1.36

.63

.59

,38

.39

.30

.36

.86

3.37

7.26

3.80

1.57

1.10

226,000

162,000

130,000

121,000

104,000

122,000

171,000

,020,000

,230,000

608,000

329,000

258,000

4,480,000

186,000

145,000

141,000

111,000

138,000

200,000

391,000

1,690,000

2,610,000

1,010,000

497,000

316,000

7,435,000

258,^00

243,000

156,000

160,000

122,000

145,000

352,000

1,380,000

2,970,000

1,550,000

641,000

449,000

83,500 1,200 11,600 20.61 8,426,000
KOOTENAI RIVER BASIN 17 

Monthly discharge of Kootenai River at Newgate, British Columbia Continued

Month

Discharge in second-feet

Maximum Minimum square 

mile

Run-off

Inche s Acre-feet

1933-34

October.............

November............

December ............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1934-35 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1935-36 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1936-37

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1937-38

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

Tne year.........

18,900

11,900

9,790

7,040

4,270

5,890

55,100

63,400

55,700

18,100

10,000

5,550

5,640

5,710

3,080

3,540

2,650

3,240

5,400

29,200

16,800

9,480

5,530

3,560

8,200

7,380

5,320

4,490

3,550

4,350

24,100

41,400

28,500

13,400

6,850

4,480

1.07

.96

.69

.59

.46

.57

3.15

5.40

3.72

1.75

.89

.58

1.23

1.07

.80

.68

.48

.66

3.51

6.23

4.15

2.02

1.03

.65

63,400 2,650 12,700 22.51

3,720

6,180

3,360

4,350

4,030

3,170

9,300

45,200

45,000

35,700

14,800

6,450

3,320

3,270

1,680

1,580

2,720

2,470

2,390

8,490

26,600

14,400

6,350

3,980

3,470

4,220

2,750

2,610

3,160

2,700

4,600

21,100

37,500

23,300

9,590

5,230

.45

.55

.36

.34

.41

.35

.60

2.75

4.90

3.04

1.25

.52

.61

.42

.39

.43

.40

.67

3.17

5.47

3.50

1.44

.76

45,200 1,580 10,000 1.31 17-78

3,970

3,090

2,570

2,350

1,970

2,670

18,200

48,400

49,100

12,400

6,530

4,850

2,660

2,050

1,980

1,380

994

1,820

1,770

13,700

13,000

6,580

4,210

3,170

3,590

2,760

2,270

1,990

1,540

2,210

8,660

26,600

22,000

9,330

5,470

3,880

.47

.36

.30

.26

.20

.29

1.13

3.47

2.87

1.22

.71

.51

.54

.40

.35

.30

.22

.33

1.26

4.00

3.20

1.41

.82

.57

49,100 994 7,540 .98 13.34

3,310

2,340

2,740

1,880

1,790

2,000

5,850

37,100

37,800

24,900

9,040

4,980

2,460

1,660

1,340

1,160

1,520

1,550

2,040

6,510

16,400

8,700

5,110

3,800

2,880

2,100

1,910

1,570

1,700

1,760

3,010

18,300

26,400

13,900

6,930

4,490

.38

.27

.25

.20

.22

.23

.39

2.39

3.45

1.81

.90

.59

.44

.30

.29

.23

.23

.26

.44

2.76

3.85

2.09

1.04

.66

37,800 1,160 7,100 .93 12.59

9,610

8,300

4,070

3,880

2,580

3,480

23,900

68,800

52,600

28,400

9,420

5,720

3,540

3,720

1,850

2,010

1,880

2,260

2,730

14,500

29,700

9.690

5,250

4,250

4,230

5,060

2,900

2,760

2,270

2,720

9,370

30,900

41,700

17,800

6,570

4,920

.55

.66

.38

.36

.30

.36

1.22

4.03

5.44

2.32

.86

.64

.63

.74

.44

.42

.31

.42

1.36

4.65

6.07

2.68

.99

.71

504,000

439,000

327,000

276,000

197,000

268,000

1,440,000

2,550,000

1,700,000

821,000

421,000

267,000

9,210,000

213,000

251,000

169,000

160,000

176,000

166,000

274,000

1,300,000

2,230,000

1,430,000

590,000

311,000

7,270,000

221,000

164,000

140,000

122,000

88,400

136,000

515,000

1,640,000

1,310,000

574,000

336,000

231,000

5,480,000

177,000

125,000

117,000

96,700

94,700

108,000

179,000

1,120,000

1,570,000

854,000

426,000

267,000

5,130,000

260,000

301,000

178,000

170,000

126,000

167,000

558,000

1,900,000

2,480,000

1,100,000

404,000

293,000

68,800 1,850 11,000 1.44 19.42 7,940,000
18 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Yearly discharge of Kootenal River at Newgate, British Columbia

Year

T Q^tT

1933..........

1934..........

1935. .........

1936.......... 

1937. .........

1938..........

Year ending Sept. 30

Discharge In 

second-feet

Mean

6,190 

10,300 

11,600 

12,700 

10.000

7J540 

7,100 

11,000

Per 

square 

mile

0.80 

1.34 

1.51 

1.66 

1.31

.98 

.93

1.44

Run-off

inches

10.99 

18.22 

20.61 

22.51

17.78

13.34 

12.59 

19.42

Acre-feet

4,480,000 

7,440,000 

8,430,000 

9,210,000 

7,270,000

5, 480,000 

5,130,000 

7,940,000

Calendar year

Discharge In 

second-feet

Mean

6,130 

10,500 

12, 500 

11,800 

9,900

7^390 

7,540 

10,700

 Per 

square 

mile

0.80 

1.37 

1.63 

1.54 

1.29

.96 

.98 

1.40

Run- off

Inches

10.88 

18.66

22.11 

20.96 

17.52

13.14 

13.37 

19.01

Acre-feet

4,440,000 

7,620,000 

9,040,000 

8,570,000 

7,160,000

5,370;000 

5,450,000 

7,770,000

Kootenal River near Rexford, Mont. 

(International gaging station)

Location.- Wire-weight gage, lat. 48°52', long. J.j.o-j.4', In sec. 21, T. 36 N., R. 28 

"., at highway bridge 300 feet downstream from Sullivan Creek and 1.1 miles southwest of Rexford.

Drainage area.- 8,420 square miles.

Records available.- March 1929 to September 1938.

Extremes.- Maximum discharge, 87,300 second-feet June 18, 1933 (gage height, 15.70 

feet); minimum, 1,100 second-feet Feb. 7, 1936, when stage-discharge relation was 

affected by Ice.

Remarks.- No diversion or regulation. This station Is one of the International gaging 

stations maintained by Canada under agreement with the United States.

Monthly discharge of Kootenal River near Rexford, Mont.

Month

1929

The period. ................

1929-30

May...........................

Discharge In second-feet

Maximum

4,160 

8,580 

45,700 

52,900 

19,600 

9,130 

6,350

-

4,340 

3,030 

3,180 

2,620 

3,990 

3,180 

19,600 

41,100 

46,400 

25,900 

10,300 

5,910

46,400

Minimum

2,890 

2,750 

7,050 

18,600 

8,850 

5,490 

3,820

-

3,180 

1,980 

1,750 

1,800 

2,200 

2,170 

3,180 

13,600 

24,800 

9,700 

5,700 

4,340

1,750

Mean

3,300 

3,700 

17,700 

34,100 

13,260 

7,160 

4,710

-

3,610 

2,610 

2,500 

2,120 

2,560 

2,420 

9,490 

31,700' 18,700 

17,700 

8,030 

5,230

8,900

Per 

square 

mile

0.392 

.439 

2.10 

4.05 

1.57 

.850 

.559

-

.429 

.310 

.297 

.252 

.304 

.287 

1.13 

2.22 

3.76 

2.10 

.954 

.621

1.06

Run- off

Inches

0.12 

.49 

2.42 

4.52 

1.81 

.98 

.62

-

.49 

.35 

.34 

.29 

.32 

.33 

1.26 

2.56 

4.20 

2.42 

1.10 

.69

14.35

Acre-feet

52, 400 

220,000 

1,090,000 

2,030,000 

812,000 

440,000 

280,000

4,920,000

222,000 

155,000 

154,000 

130,000 

,142,000 

149,000 

565,000 

1,150,000 

1,890,000 

1,090,000 

494,000 

311,000

6,450,000
KOOTENAI RIVER BASIN 19

Monthly discharge of Kootenal River near Rexford, Mont. Continued

Discharge in second-feet

Maximum

Per 

square 

mile

Inches Acre-feet

1930-31

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1931-32 

October.............

November...........

December............

January............

February...........

WjFcla................

April..........

May.................

June...............

July...............

August.............

September...........

The year.........

1932-33

October............

November............

December...........

January.............

February............

March...............

April...............

May.................

June................

July...............

August.............

September..........

The year........

1933-34 

October............

November...........

December............

January.............

February............

March...............

April...............

May.................

June................

July...............

August.............

September..........

The year*........

1934-35 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

4,410

3,460

2,800

2,420

2,360

2,800

5,910

34,700

27,100

15,600

7,540

6,350

3.380

2,600

1,590

1,630

1,800

2,040

2,300

7,290

15,600

7,540

4,600

3,790

3,860

3,020

2,310

2,160

2,090

2,270

3,110

17,600

21,800

10,800

5,810

4,620

0.458

.359

.274

.257

.248

.270

.369

2.09

2.59

1.28

.690

.549

0.53

.40

.32

.30

.26

.31

.41

2.41

2.89

1.48

.80

.61

34,700 1,590 .787 10.72

3,790

3,790

2,930

2,480

10,600

7,790

10,300

52,100

61,400

31,700

11,300

8.110

3,000

1,560

1,580

1,280

1,580

3,080

3,460

9,990

28,300

12,000

7,850

4,570

3,290

2/700

2,440

1,940

2,590

3,680

7,270

28,800

45,400

17,700

9,060

6,040

,391

,321

.290

,230

,308

,437

,863

,42

,39

,10

,08

,717

.45

.36

.33

.27

.33

.50

.96

3.94

6.01

2.42

1.24

.80

61,400 1,280 10,900 l.J 17.61

5,550

5,550

6,640

3,830

2,790

3,160

20,800

42,300

87,300

40,000

14,500

11,600

4,010

4,010

1,700

2,150

1,650

2,580

3,240

14,500

31,100

14,800

8,910

6,640

4,690

4,630

2,930

3,040

2,370

2,780

6,500

22,800

50,500

27,400

10,900

7,810

,557

,550

.348

.361

,281

.330

,772

.71

,00

,25

.29

,928

.64

.61

.40

.42

.29

.38

.86

3.12

6.69

3.75

1.49

1.04

87,300 1,650 12,200 1.45

20,300

13,400

10,400

7,850

4,660

6,640

55,000

64,000

 59,900

19,300

10,800

5,910

5,760

5,760

3,400

4,010

2,720

3,650

6,190

31,200

18,300

9,930

5,690

3,680

8,541

7,835

5,527

5,023

3,860

4,913

24,500

42,040

30,050

14,070

7,306

4,743

1.01

.931

.656

.597

.458

.583

2.91

4.99

3.57

1.67

.868

.563

1.16

1.04

.76

.69

.48

.67

3.25

5.75

3.98

1.93

1.00

.63

2,720 13,240 ^21.34

3,960

6,580

3,690

6,000

4,300

3,670

10,200

46,700

46,700

35,000

15,000

6,760

3,340 

3,340 

1,830 

1,7CO 

2,740 

2,540 

2,540 

9,660 

28,400 

15,000 

6,760 

4,290

3,581

4,580

2,893

2,926

3,321

2,956

5,086

21,720

38,850

23,850

9,892

5,461

.425

.544

.344

.348

.394

.351

.604

2.58

4.61

2.83

1.17

.649

.49

.61

.40

.40

.41

.40

.67

2.97

5.14

237,000

180,000

142,000

133,000

116,000

140,000

185,000

1,080,000

1,300,000

664,000

357,000

275,000

4,810,000

202,000

161,000

150,000

119,000

149,000

226,000

433,000

1,770,000

2,700,000

1,090,000

557,000

359,000

7,920,000

288,000

276,000

180,000

187,000

132,000

171,000

387,000

1,400,000

3,000,000

1,680,000

670,000

465,000

8,840,000

525,200

466,200

339,800

308,800

214,400

302,100

1,458,000

2,585,000

1,788,000

865,100

449,300

383,200

9,584,000

220,200

272,500

177,900

179,900

184,400

181,700

302,700

1,335,000

2,312,000

1,466,000

608,200

325,000

46,700 1,700 10,450 1.24 16.82 7,566,000
SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River near Rexford, Mont. Continued

Discharge in second-feet

Maximum square 

mile

Acre-feet

1935-36

October............

November...........

December...........

January............

February...........

March..............

April..............

May......... .......

June...............

July...............

August.... ........

September..........

The year........

1936-3Y 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.......Ck. 

September..........

The year........

193Y-38

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

4,220

3:640

2,900

2,620

2,100

3,260

19,000

47,500

48,400

12,600

6,900

5,480

3,110

2,400

1,800

1,680

1,100

1,870

1,740

14,600

14,300

6,900

4,510

3,320

3,948

3,066

2,567

2,285

1,666

2,484

9,256

27,970

23,100

9,776

5,735

4,086

,469

,364

,305

,271

,198

,295

,10

,32

.74

,16

.681

,485

0.54

.41

.35

.31

.21

.34

1.23

3.83

48,400 1,100 .951 12.96

3,310

2,590

2,810

2,100

6,000

36,500

37,200

24,800

9,220

5,080

2,630

1,720

1,140

2,150

6,330

19,200

8,940

5,280

3,980

2,925

2,167

1,991

1,620

1,839

1,883

3,146

17,950

26,490

14,360

7,125

4,634

.347

.257

.236

.192

.218

.224

.374

2.13

3.15

1.71

.846

.550

.40

.29

.27

.22

.23

.26

.42

2.46

3.51

1.97

.98

.61

37,200 1,140 7,200 .855

10,100

8,920

4,330

3,970

2,700

3,720

23,700

69,900

58,800

30,900

9,820

5,970

3,720

4,060

1,700

1,900

1,900

2,380

2,990

15,400

32,800

10,100

5,470

4,330

4,357

5,423

3,092

2,981

2,366

2,929

9,795

31,930

44,080

18,150

6,939

5,120

.517

.644

.367

.354

.281

.348

1.16

3.79

5.24

2.16

.824

.60

.72

.42

.41

.29

.40

1.29

4.37

5,85

2.49

.95

.68

242,800

182,500

157,800

140,500

95,820

152,700

550,800

1,720,000

1,374,000

601,100

352,600

243,200

5,814,000

179,800

129,000

122,400

99,610

102,100

115,800

187,200

1,104,000

1,576,000

882,800

438,100

275,800

5,213,000

267,900

322,700

190,100

183,300

131,400

180,100

582,800

1,963,000

2,623,000

1,116,000

426,700

304,600

69,900 1,700 11,450 18.47 8,292,000

Yearly discharge of Kootenai River near Rexford, Mont.

Year ending Sept. 30

Discharge in 

second-feet

, Per 

square 

mile

Run-off

Calendar year

Discharge in 

second-feet

square 

mile

Run-off

Inches

1930.

1931.

1932.

1933.

1934.

1935.

1936.

1937.

1938.

TO"

900

630

900

200

240

450

009

200

450

1.06

.787

1.29

1.45

1.57

14.35

10.72

17.61

19.69

21.34

6,450,000

4,810,000

7,920,000

8,840,000

9.584.000

8,950

6,580

11,220

13,020

12.520

1.06

.781

1.33

1.55

1.46

14.42

10.61

18.12

21.00

19.88

6,480,000

4,763,000

8,147,000

9,423,000

1.24' 8.924.000

.951 

.855

1.36

16.82

12.96

11.62

18.47

7.566,000 

5,'814, 000 

5,213,000 

8,292,000

10,330

7,800

7,683

1.23

.926

.912

16.62

12.61

12.40

7,478,000

5,662,000

5,562.000
KOOTENAI RIVER BASIN 21

Kootenai River at Libby, Mont.

Location.- Water-stage recorder, lat. 48°24', long. 115°33', in NW^ sec. 3, T. 30 N., R.

31 W., 1,200 f*et downstream from highway bridge at Libby. Prior to Apr. 28, 1931,

chain gage at highway bridge at different datum. 

Drainage area.- 10,240 square miles. 

Records available.- October 1910 to September 1938 

Extremes.- Maximum discharge, 130,000 second-feet June 21, 1916 (gage height, 19.17

feet); minimum, 895 second-feet Jan. 11, 1930 (discharge measurement, ice present). 

Remarks.- No diversion or regulation.

Monthly discharge of Kootenai River at Libby, Mont.

Discharge in second-feet

Per 

square 

mile

Inches Acre-feet

1910-11 

October 13-31.......

November............

December 1-13.......

March 8-31..........

April...............

May.................

June................

July................

August..............

September...........

1911-12 

October.............

November 1-26.......

March...............

April...............

May.................

June................

July................

August..............

September...........

1912-13 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1913-14 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1914-15 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

10,800

10,400

5,970

7,890

22,400

29,500

72,500

45,900

17,300

9,650

6,590

6,280

4,020

11,600

36,100

35,400

27,600

15,000

10,800

,230

,560

,140

,330

,150

,700

,000

,600

,300

,400

,900

,100

77,300

,920

,280

,370

,560

,780

,670

,300

,500

,900

,000

,300

,280

56,900

9,650

12,800

6,280

3,060

5,370

20,800

27,600

34,000

28,800

15,900

8,920

7,560

5,970

4,530

3,550

6,280

17,800

24,100

15,900

8,920

6,590

4,800

3,780

2,600

4,020

10,000

17,800

15,000

10,000

6,590

090

910

420

360

600

700

500

700

200

040

5,780

4,890

2,930

9,080

22,500

26,100

19,600

12,300

8,940

.772

.529

.523

.04

L.19 

.785

.564

.478

.286

.887

2.20

2.55

1.91

1.20

.873

0.63

.86

.26

.47

1.16

2.56

5.82

3.23

1.37

.65

.46

.33

.99

2.54

2.84

2.20

1.38

.97

5,670

4,390

2,850

2,080

2,040

2,510

3,550

11,600

30,700

15,000

10,000

7,890

6,410

6,090

3,310

2,770

2,990

3,110

11,300

26,900

51,700

20,300

13,000

9,580

.626

.595

.323

.271

.292

.304

1.10

2.63

5.05

1.98

1.27

.936

.72

.66

.37

.31

.30

»35

1.23

3.03

5.63

2.28

2,040 13,100 1.28 17.38

6,280

4,530

2,760

2,940

1,690

3,330

4,270

15,000

24,700

13,300

7,560

6,280

7,260

5,560

3,730

4,260

3,130

4,300

11,500

30,700

37,000

25,400

10,100

7,360

.709

.543

.364

.416

.306

.420

1.12

5.00

3.61

2.48

.986

.719

.82

.61 

.42 

.48 

.32

.48

1.25

3.46

4.03

2.86

1.14

.80

1,690 12,600 1.23 16.67

7,230

6,280

2,500

2,530

2,620

4,530

15,900

15,900

16,800

8,920

5,970

8,000

8,570

4,27P

3,270

2,790

3,540

11,300

19,600

21,200

20,600

11,700

6,840

.781

.837

.417

.319

.272

.346

1.10

1.91

2.07

2.01

1.14

.668

.90

.93

.48

.37

.28

.40

1.23

2.20

2.31

2.32

1.31

.75

343,000

471,000

140,000

255,000

631,000

1,400,000

3,180,000

1,760,000

750,000

478,000

355,000

252,000

t80,000

540,000

1,380,000

1,550,000

1,210,000

756,000

532,000

394,000

362,000

204,000

170,000

166,000

191,000

672,000

1,650,000

3,080,000

1,250,000

799,000

570,000

9,510,000

446,000

331,000

229,000

262,000

174,000

264,000

534,000

1,890,000

2,200,000

1,560,000

621,000

438,000

9,100,000

492,600

510,000

263,000

201,000

155,000

218,000

672,000

1,210,000

1,260,000

1,270,000

719,000

407,000

34,000 10,200 .996 13.48 7,380,000
22 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River at Libby, Mont. Continued

Discharge in second-feet

Per 

squar^ 

mile

1915-16 

October..............

November.............

December.............

March 11-31..........

April................

May..................

June.................

July.................

August...............

September............

1916-17 

October..............

November.............

December 1-6.........

March 29-31..........

April................

May..................

June.................

July.................

August...............

September............

1917-18

Dctober..............

November.............

Decembe)1 .............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year..........

1918-19 

October..............

November.............

December.............

?ebruary.............

March................

April................

May..................

June.................

July.................

August...............

September............

1919-20 

October..............

November 1-15........

March................

April................

May..................

June.................

July.................

August...............

September............

1920-21 

October..............

January 12-31........

February.............

Varch................

April................

May..................

June.................

July.................

lugust...............

September............

1921-22 

October..............

iovember.............

December 1-17........

March 15-31..........

April................

May..................

June.................

July.................

August...............

September............

6,910

7,230

4,800

10,800

20,300

39,700

129,000

71,500

19,800

17,300

7,890

5,970

5,080

3,780

B,230

45,900

65,000

43,500

13,700

8,230

5,370

3,780

2,940

5,970

8,570

16,400

24,700

19,800

12,400

7,890

5,670

3,330

4,530

3,330

3,330

7,230

28,800

15,000

8,230

5,970

6,180

5,420

3,880

8,920

12,800

23,500

62,400

45,800

15,200

11,300

6,480

5,000

4,900

3,550

5,910

25,800

42,700

28,300

10,900

6,730

0.604

.529

.379

.871

1.25

2.29

6.09

4.47

1.48

1.10

.633

.488

.479

.347

.577

2.52

4.17

2.76

1.06

.657

0.70

.59

.44

.68

1.40

2.64

6.80

5.15

1.71

1.23

.73

.54

.11

.04

.64

2.90

4.65

3.18

1.22

.73

6,310

4,170

8,540

13,700

4,500

7,400

15,700

36,800

75,600

21,900

12,500

8,880

4,000

3,120

1,960

2,300

2,250

3,100

5,440

14,000

19,800

12,400

8,540

5,820

5,070

3,830

4,080

5,480

3,560

4,280

10,700

22,800

44,100

17,400

10,400

6,850

.495

.374

.398

.535

.348

.418

1.04

2.23

4.31

1.70

1.02

.669

.57

.42

.46

.62

.36

.48

1.16

2.57

4.81

1.96

1.18

.75

75,600 1,960 11,600 1.13 15.34

8,470

5,670

5,050

4,560

5,490

30,400

79,800

56,100

28,700

16,800

8,500

5,020

3,780

4,400

8,990

26,600

52,900

60,500

18,200

12,100

10,800

5,250

8,780

7,400

16,300

69,500

72,900

35,400

15,900

7,230

6,160

6,090

12,200

3,620

8,460

42,600

69,200

23,600

9,730

7,430

5,430

3,040

2,880

2,160

2,580

6,340

14,300

27,000

11,200

7,630

5,140

2,490

2,300

2,820

3,000

7,490

14,300

17,900

7,990

7,070

7,090

2,720

2,840

4,070

5,340

10,500

35,600

16,000

7,330

5,140

4,910 

S,210 

3,730

-S,780 

S,880 

8,740

28,500 

9,610 

7,070 

4,750

6,350

4,660

3,900

3,430

3,600

11,800

35,700

37,600

17,900

10,600

6,330

4,130

3,240

3,380

5,400

17,200

35,000

36,200

12,400

8,860

8,820

3,790

4,620

5,310

10,600

35,200

49,700

21,600

10,500

5,880

 5,360

4,880

5,920

3,330

5,040

23,800

41,300

14,600

8,510

6,000

.620 

.455 

.381 

.335 

.352 

1.15 

3.49 

3.67 

1.75 

1.04- 

.618

.403

.316

.330

.527

1.68

3.42

3.54

1.21

.865

.861

.370

.451

.519

1.04

3.44

4.85

2.11

.523

.477

.578

.313

.492

2.32

4.03

1.43

.831

.586

1.20

.46

.18

.38

.59

1.94

3.82

4.08

1.40

.28

.47

.60

1.16

3.97

5.41

2.43

1.19

.64

380,000

323,000

239,000

372,000

762,000

1,440,000

3,710,000

2,820,000

935,000

672,000

398,000

298,000

58,300

21,100

352,000

,590,000

,540,000

,740,000

670,000

400,000

312,000

228,000

251,000

337,000

198,000

263,000

637,000

1,400,000

2,620,000

1,070,000

640,000

408,000

8,360,000

390,000

277,000

240,000

190,000

221,000

702,000

2,200,000

2,240,000

1,100,000

652,000

377,000

254,000

96,400

208,000

321,000

1,060,000

2-, 080,000

2,300,000

762,000

527,000

542,000

150,000

257,000

326,000

631,000

2,160,000

2,960,000

1,330,000

646,000

350,000

330,000

290,000

200,000

108,000

300,000

1,460,000

2,460,000

898,000

523,000

- 357,000
KOOTENAI RIVER BASIN 23

Monthly discharge of Kootenai River at Libby, Mont. Continued

Discharge in second-feet

Minimum Mean

Per

square

mile

Run-off

Acre-feet

1922-23

October...............

November..............

March.................

April.................

May...................

June..................

July..................

August................

September.............

 1923-24 October...............

November..............

December 1-18.........

February 20-29........

March.................

April.................

May...................

4.une..................

July..................

August................

September.............

n . 1924-25 October...............

April 22-30...........

May...................

June..................

July..................

August................

September.............

 . . 1925-26 October...............

November..............

December..............

January...............

February..............

March.................

April.................

May...................

June..................

July..................

August 1-10...........

The period.........

October.......}??????.

November 1-27.........

June..................

July 1-20.............

1927-28 April.................

May...................

June..................

July..................

August................

September..............

' The period.........

October.......}???:??.

November..............

December..............

January...............

February..............

March.................

April.................

May...................

June..................

July..................

\ugust................

September.............

The year...........

n . . 1929-30 October...............

November..............

December..............

January...............

February..............

larch.................

April.. ...............

May...................

June..................

July..................

Uigust................

September.............

The year...........

5,880

5,170

4,720

18,400

41,200

71,300

37,300

12,400

7,560

4,660

3,660

3,440

3,550

3,350

7,040

43,300

23,800

19,500

10,200

7,270

5,220

18,700

76,800

45,100

32,000

11,600

6,740

5,870

3,780

2,920

2,620

2,620

3,330

21,900

25,800

15,900

13,300

6,280

18,500

8,400

82,100

36,100

24,500

70,200

42,300

42,300

14,000

6,600

,900

,600

,750

,000

,150

,780

,300

,800

,600

,800

,970

,960

,690 

I070 

,800

000

000

000

700

500

800

290

3,690

2,880

2,510

4,750

12,500

38,800

12,900

7,630

4,690

3,780 

3,120 

2,820 

3,060 

2,510 

2,510 

8,370

15,500 

7,990 

7,340

"4,240

4,000

14,800

17,000

28,500

11,200

6,590

5,970

4,400

3,610

2,930

9,040

27,500

50,100

21,200

9,350

5,920

4,240

3,310

3,090

3,340

2,830

4,330

24,300

18,700

11,800

8,810

5,550

4,320

16,300

42,700

36,300

17,300

9,170

6,200

0.430

.35

.286

.883

2.69

4.89

2.07

.913

.578

.414

.323

.302

.326

.276

.423

2.37

1.83

1.15

.860

.542

,4ii2 

1.59 

4.17 

3.54 

1,69 

.896 

.605

0.50

.39

.33

.99

3.10

5.46

2.39

1.05

...64

.48

.36

.20

.12

.32

.47

2.73

2.04

1.33

.99

.60

.49

.53

4.81

3.95

1.95

1.03

.68

271,000

215,000

180,000

538,000

1,690,000

2,980,000

1,300,000

575,000

352,000

261,000

197,000

110,000

66,200

174,000

258,000

1,490,000

1,110,OOQ).

726,000'

542,000

330,000

266,000

291,000

2,630,000

2,160,000

1,060,000

564,000

369,000

3,780

2,720

2,300

2,160

2,340

2,340

2,530

10,900

9,650

6,970

5,370

4,510

3,340

2,790

2,400

2,430

2,780

9,610

15,200

12,300

9,180

5,750

.440

.326

.272

.234

.237

.271

.938

1.48

1.20

.896

.562

.51

.36

.31

.27

.25

.31

1.05

1.71

.34 

.03 

.21

277,000

199,000

172,000

148,000

135,000

171,000

572,000

935,000

732,000

564,000

118,000

4,020,000

6,400

3,900

23,200

23,500

9,450

5,960

52,500

31,300

.923

.582

5.13

3.06

1.06

.58

5.72

2.28

581,000

319,000

3,120,000

1,240,000

5,370

15,400

27,000

14,400

6,600

4,250

9,180

46,800

32,700

25,400

9,240

5,440

.896

4.57

3.19

2.48

.902

.531

1.00

5.27

3.56

546,000

2,880,000

1,950,000

1,560,000

568,000

324,000

7,830,000

4,250

3,330

2,440

2,300

2,300

2,160

2,620

9,200

20,300

9,560

5,960

4,090

6,360

3,910

2,940

2,460

2,730

2,970

4,190

21,200

37,900

14,500

7,810

5,050

.621

.382

.287

.240

.267

.290

.409

2.07

3.70

1.43

.763

.493

.72

.43

.33

.28

.28

.33

.46

2.39

4.13

1.64

.88

.55

391,000

233,000

181,000

151,000

152,000

183,000

249,000

1,300,000

2,260,000

892,000

480,000

501,000

2,160 9,330 .911 12.42 6,770,000

3,160

1,700

1,800

4,690

16,000

26,800

10,800

6,290

4,690

3,740

2*500

2,820

2,420

3,080

2,930

12,500

21,100

35,200

18,900

8,650

5,550

.365

.244

.275

.236

.301

.286

1.22

2.06

3.44

1.85

.845

.542

.42

.27

.32

.27

.31

.33

1.36

2.38

3.84

2.13

.97

.60

230,000

149,000

173,000

149,000

171,000

180,000

744,000

1,300,000

2,090,000

1,160,000

532,000

330,000

50,700 9,960 .973 13.20 7,210,000
24 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River at Libby, Mont. Continued

Discharge in second-feet

Maximum square

mile

Run-off

Inches

1930-31

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July. ..............

August.............

September..........

The year........

1931-3S 

October............

November...........

December............

January............

February............

March...............

April...............

Hay.................

June................

July................

August..............

September...........

The year.........

193S-33 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

The period.......

1933-34

January 9-31........

February............

March...............

April....... ........

May.................

June................

July................

August..............

September...........

The period .......

1934-35 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July......... .......

August..............

September...........

The year.........

4,690

4,000

2,990

3,380

3, ISO

3,520

7,170

40,600

29,000

18,400

8,100

6,120

3,800

2,800

2,090

2,090

1,990

2,300

2,520

8,740

17,200

8,100

4,700

4,020

4,140

3,330

2,560

2,710

2,380

2,59Q

3,940

20,700

23,800

12,000

6,060

4,730

404

.325

.250

265

232

.253

385

02

32

17

592

462

0.47

.36

.29

.31

.24

.29

.43

2.33

2.59

1.35

.68

.52

40,600 1,990 7,430 .726

4,020

3,890

3,020

2,440

16,800

11,100

15,000

56,200

61,400

33,800

11,000

8,100

3,050

1,760

1,830

1,520

1,600

3,220

4,840

13,900

28,000

11,200

7,790

5,120

3,440

2,860

2,620

2,090

3,120

4,450

10,300

34,000

47,000

18,000

9,070

6,170

.336

.279

.256

.204

.305

.435

.01

.32

.59

.76

.886

.603

.39

.31

.30

.24

.33

.50

1.13

3.83

5.12

2.03

1.02

.67

61,400 1,520 11,900 1.16 15.87

5,520

6,600

8,110

4,110

3,150

4,220

31,100

48,000

80,000

41,800

14, 800

4,220

4,220

1,370

2,550

1,320

2,810

4,350

17,900

37,100

15,900

9,260

4,700

4,930

4,190

3,340

2,420

3,240

9,240

28,400

54,400

28,400

11,100

.459

.481

.409

.326

.236

.316

.902

2.77

5.31

2.77

1.08

.53

.54

.47

.38

.25

.36

1.01

3.19

5.92

3.19

1.24

8,100

7,350

11,700

61,000

63,700

61,700

20,600

11,700

6,360

5,940

4,140

5,150

11,300

34,400

19,800

10,600

6,220

4,260

6,736

5,951

7,304

31,060

45,330

32,180

15,260

7,874

5,266

.658

.581

.762

3.03

4.43

3.14

1.49

.769

.514

3.38

5.11

3.50

1.72

.89

.57

5,940

10,600

4,500

7,060

6,220

5,020

16,100

51,800

46,900

36,000

16,100

7,060

3,780

4,500

1,800

3,540

3,080

3,420

14,600

29,200

17,300

7,060

4,500

4,293

6,193

3,590

3,700

4,469

3,874

7.S98

27,090

40,210

25,380

10,830

5,812

.419

.605

.351

.361

.436

.378

.752

2.65

3.93

2.48

1.06

.568

.48

.68

.40

.42

.45

.44

.84

3.06

4.38

2.86

1.22

,63

255,000

198,000

157,000

167,000

132,000

159,000

234,000

1,270,000

1,420,000

738,000

373,000

281,000

5,380,000

212,000

170,000

161,000

129,000

179,000

274,000

613,000

2,090,000

2,800,000

1,110,000

558,000

367,000

8,660,000

289,000

293,000

258,000

205,000

134,000

199,000

550,000

1,750,000

3,240,000

1,750,000

682,000

9,350,000

307,300

330,500

479,800

1,848,000

2,787,000

1,915,000

938,200

484,200

313,400

9,403,000

264,000

368,500

220,700

227,600

248,200

238,200

458,100

1,666,000

2,393,000

1,560,000

665,700

545,800

51,800 1,800 11,960 1.17 15. 8,656,000
KOOTENAI RIVER BASIN 25

Monthly discharge of Kootenai River at Libby, Mont. Continued

Month

Discharge in second-feet

rjaximum square 

mile

Acre-feet

1935-36

October............

November...........

December...........

January............

February............

March..............

April..............

May................

June...............

July...............

Augus t.............

September..........

The year........

1936-37 

October............

November...........

December...........

January............

February...........

March..............

April..............

May............... .

June...............

July............ . . .

August.............

September..........

The year........

1937-38

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July........ .......

August.............

September..........

The year. .......

4,500

4,140

3,080

2,840

2,160

4,140

26,800

47,500

48,800

14,600

6,920

5,280

3,540

2,550

1,800

1,500

2,290

2,220

19,800

16,100

6,920

4,500

3,300

4,101

3,391

2,784

2,161

1,728

3,104

12,960

31,430

25,020

10,340

5,816

4,154

,400

331

272

,211

169

303

27

,07

44

,01

,568

,406

0.46

.37

.31

.24

.18

.35

1.42

3.54

2.72

1.16

.65

.45

48,800 8,927 .872 11.85

3,420

2,860

3,440

2,420

2,720

8,000

40, 40"0

38,800

26,800

9,660

5,410

2,970

2,000

1,400

1,230

1,940

2,720

8,380

21,400

9,340

5,540

4,260

3,177

2,409

2,340

1,764

2,152

2,423

4,480

22,370

29,250

15,600

7,1425

4,818

.310 

.235 

.229 

.172 

.210 

.237 

.438 

2.18 

2.86 

1.52 

-725 

.471

.36

.26

.26

.20

.22

.27

.49

2.51

3.19

1.75

.84

.53

40,400 1,230 .802 10.88

10,300

9,980

4,880

4,800

3,440

4,760

33,800

78,800

65,700

30,900

10,000

6,290

4,020

4,260

1,800

1,850

1,900

2,860

3,780

18,000

32,600

10,300

5,630

4,740

4,494

5,307

3,387

3,514

2,820

3,587

12,900

35,960

45,810

18,130

7,250

5,385

.439

.567

.330

.343

.275

.350

1.26

3.51

4.47

1.77

.708

.526

.51

.63

.38

.40

.29

.40

1.41

4.05

4.99

2.04

.82

252,200

201,800-

171,200

132,900

99,390

190,800

771,000

1,932,000

1,489,000

635, 500

357,600

247,200

6,481,000

195,400

143,300

143,900

108,500

119,500

149,000

226,600

1,375,000

1,740,000

959,100

456,600

286,700

5,944,000

276,-300

345,500

207,900

216,100

156,600

220,500

767,800

2,211,000

2,726,000

1,115,000

445,800

320,400

78,800 1,800 12, 440 1.21 9,009,000

Yearly discharge of Kootenai River at Libby, Mont.

Year ending Sept. 30

Discharge in 

second-feet

square 

mile

Inches Acre-feet

Calendar year

Discharge in 

second-feet

square

mile

1913.

1914.

1915.

1918.

1929.

100

600

200

600

330

1.28

1.23

.996

1.13

.911

17.38

16.67

13.48

15.34

12.42

9,510,000

9,100,000

7,380,000

8,360,000

6,770,00.0

13,200

12,900

9,740

11,700

9.010

1.29

1.26

.951

1.14

.879

17.48

17.13

12.90

15.55

11.95

9,554,000

9,358,000

7,054,000

8,480,000

6,520,000

1930.

1931.

1932.

1935.

1936.

960

430

900

960

927

.973

.726

1.16

1.17

.872

13.20

9.86

15.87

15.86

11.85

7,210,000

5,380,000

8,660,000

8,656,000

6.481.000

10,000

7,340

12,300

11,640

8.751

.977

.717

1.21

1.14

.855

13.31

9.74

16.41

15.44

11.59

7,266,000

5,317,000

8,960,000

8,428,000

6.558.000

1937.

1938.

Highest. 

Average. 

Lowest..

211

440

.802

1.21

10.88

16.51

5,944,000

9,009,000

.849 11.52 6,291,000

13,100

10,640

7,450

1.28

1.05

.726

17.58

14.11

9.86

9,510,000

7,705,000

5,580,000

13,200

10,480

7,340

1.29

1.02

.717

17.48

15.91

9.74

9,554,000

7,597,000

5,517,000
26 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Kootenai River at Leonia, Idaho

Location.- Water-stage recorder, 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 Creek. Datum of gage is 1,700.00 feet above mean sea level, 

U. S. Coast and Geodetic Survey datum.

Drainage area.-' 11,740 square miles.

Records available.- March 1928 to September 1938.

Extremes.- Maximum discharge, 95,500 second-feet June 18, 1933 (elevation, 1,818.11 

feet}; minimum, 996 second-feet Dec. 9, 1936: minimum elevation, 1,797.56 feet Dec. 

10, 1929.

Floods of June 1894 and 1916 reached elevations of 1,824.6 and 1,821.6 feet, 

respectively (information furnished by Great Northern Railway Co.).

Remarks.- No diversion or regulation above station.

Monthly discharge of Kootenai River at Leonia, Idaho

Discharge in second-feet

Maximum Minimum Mean square 

mile

Acre-feet

1928

March 25-31.....

April.............

May...............

June..............

July..............

August............

September.........

The period ....

1928-29 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1929-30 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May.......... .....

June..............

July..............

August............

September.........

The year.......

1930-31 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May............ ...

June..............

July..............

August............

September.........

The year........

13,800

32,800

76,700

48,100

44,000

16,200

7,660

9,810

8,180

21,100

29,600

16,900

7,660

5,570

12,700

54,600

35,400

27,400

10,400

6,680

0.971

1.08

4.65

3.02

2.33

.886

.569

0.25

1.20

5.36

3.37

2.69

1.02

.63

15,200

6,000

4,520

6,660

16,100

59,000

59,700

21,600

9,670

6,660

5,780

4,520

3,910

13,000

2JL,600

9,410

6,190

4,210

7,280

5;130

3,620

2,900

3,120

3,860

6,240

26,800

40,000

14,400

7,810

5,190

.620

.437

.308

.247

.266

.329

.532

2.28

3.41

1.23

.665

.442

.71

.49

.36

.28

.88

.38

.59

2.63

3.80

1.42

.77

.49

59,700 10,500 .894 12.130

4,740

3,740

4,090

3,540

5,600

6,420

28,700

42,500

55,700

27,000

10,900

6,440

3,830

2,350

2,000

2,250

2,900

3,270

6,420

18,100

28,200

11,200

6,670

5,040

4,130

3,090

3,220

2,730

3,540

3,820

15,700

23,600

38,200

19,800

8,840

5,900

.352

.263

.274

.333

.302

.325

1.34

2.01

3.25

1.69

.753

.503

.41

.29

.32

.27

.31

.37

1.50

2.32

3.63

1.95

.87

.56

55,700 2,000 11,100 .945 12.80

5,040

4,540

3,340

3,710

3,520

5,140

10,100

46,000

31,100

18,600

7,920

6,550

4,160

3,260

2,150

2,050

2,450

2,700

3,970

12,600

17,900

8,160

5,080

4,500

4,620

3,760

2,860

2,850

2,870

3,490

5,810

24,900

25,000

11,900

6,280

5,120

.394

.320

.244

.243

.244

.297

.495

2.12

2.13

1.01

.535

.436

.45

.36

.28

.28

.25

.34

.55

2.44

2.38

1.16

.62

.49

158,000

756,000

3,360,000

2,110,000

1,680,000

640,000

397,000

9,100,000

448,000

305,000

223,000

178,000

173,000

237,000

371,000

1,650,000

2,380,000

885,000

480,000

309,000

7,640,000

254,000

184,000

198,000

168,000

197,000

235,000

934,000

,450,000

,270,000

,220,000

544,000

351,000

8,000,000

284,000

224,000

176,000

175,000

159,000

214,000

346,000

1,530,000

1,490,000

731,000

386,000

305,000

46,000 2,050 8,320 .708 9.60 6,020,000
KOOTENAI RIVER BASIN 27

Monthly discharge of Kootenai River at Leonla, Idaho Continued

Month

1931-32

May...........................

1932-33

1933-34

April

1934-35

1935-36

Discharge in second-feet

Maximum

4,400 

4,780 

3,300 

2,920 

20,000 

15,100 

20,300 

68,300 

70,400 

36,800 

12,500 

8,620

70,400

6,010 

7,840 

10,900 

5,390 

4,060 

5,530 

44,800 

61,000 

95,500 

45,300 

16,300 

12,200

95,500

24,300 

21,000 

43,200 

17,400 

10,200 

16,100 

74,400 

68,900 

66,700 

21,000 

11,700 

6,620

74,400

6,940 

20,400 

5,660 

14,400 

8,600 

6,640 

21,700 

63,200 

55,900 

36,700 

16,000 

7,440

63,200

4,930 

4,700 

3,530 

3,320 

2,800 

5,400 

34,900 

51,900 

53,700 

15,600 

7,460 

5,840

53,700

Minimum

3,480 

1,950 

2,000 

1,900 

1,980 

4,570 

8,170 

18,500 

32,800 

12,700 

8,520 

5,040

1,900

4,580 

4,320 

2,800 

3,200 

1,700 

3,560 

5,770 

23,000 

46,400 

17,300 

9,980 

7,990

1,700

7,370 

8,310 

7,460 

8,370 

5,810 

6,790 

15,500 

38,100 

20,800 

10,900 

6,500 

4,730

4,730

4,170 

4,760 

2,200 

1,900 

4,630 

4,250 

4,520 

19,700 

30,200 

17,300 

7,440 

4,980

1,900

3,880 

2,680 

2,000 

1,970 

1,320 

2,760 

2,620 

26,100 

17,200 

7,550 

5,090 

3,990

1,320

Mean

3,870 

3,390 

2,880 

2,600 

3,840 

6,420 

14,900 

42,900 

53,100 

19,900 

9,760 

6,550

14,200

5,180 

5,920 

5,360 

4,110 

3,140 

4,020 

13,300 

35,800 

64,900 

30,800 

12,300 

9,100

16,200

10,120 

11,280 

13,700 

11,330 

8,304 

10,390 

39,940 

51,880 

33,690 

15,710 

8,233 

5,606

18,380

4,728 

8,447 

4,412 

5,107 

5,916 

5,162 

10,470 

34,540 

44,440 

25,690 

11,110 

6,245

13,880

4,618 

3,765 

3,081 

2,881 

1,994 

3,748 

16,930 

37,450 

27,300 

11,060 

6,373 

4,744

10,340

Per 

square 

mile

0.330 

.289 

.245 

.221 

.327 

.547 

1.27 

3.65 

4.52 

1.70 

.831 

.558

1.21

.441 

.504 

.457 

.350 

.267 

.342 

1.13 

3.05 

5.53 

2.62 

1.05 

.775

1.38

.862 

.961 

1.17 

.965 

.707 

.885 

3.40 

4.42 

2.87 

1.34 

$01 

.478

1.57

.403 

.720 

.376 

.435 

.504 

.440 

.892 

2.94 

3.79 

2.19 

.946 

.532

1.18

.393 

.321 

.262 

.845 

.170 

.319 

1.44 

3.19 

2.33 

.942 

.543 

.404

.881

£iS Run- off

Inches

0.38 

.32 

.28 

.25 

.35 

.63 

1.42 

4.21 

5.04 

1.96 

.96 

.62

16.42

.51 

.56 

.53 

,40 

.28 

.39 

1.26 

3.52 

6.17 

6.02 

1.21 

.86

18.71

.99 

1.07 

1.35 

1.11 

.74 

1.02 

3.79 

5.10 

3.20 

1.54 

.81 

.53

21.25

.46 

.80 

.43 

.50 

.52 

.51 

1.00 

3.39 

4.23 

2.52 

1.09 

.59

16.04

.45 

.36 

.30 

.28 

.18 

.37 

1.61 

3.68 

2.60 

1.09 

.63 

.45

12.00

Acre-feet

238,000 

202,000 

177,000 

160,000 

221,000 

395,000 

887,000 

2,640,000 

3,160,000 

1,220,000 

600,000 

390,000

10,300,000

319,000 

352,000 

330,000 

253,000 

174,000 

247,000 

791,000 

2,200,000 

3,860,000 

1,890,000 

756,000 

541,000

11,700,000

622,100 

671,200 

842,100 

696,500 

461,200 

638,800 

2,377,000 

3,190,000 

2,004,000 

© 966,100 

506,200 

333,600

13,310,000

290,700 

502,600 

271,300 

314,000 

328,500 

317,400 

622,800 

2,124,000 

2,644,000 

1,579,000 

682,800 

371,600

10,050,000

284,000 

224,000 

189,400 

177,100 

114,700 

230,400 

1,007,000 

2,303,000 

1,624,000 

680..300 

391,900 

282,300

7,508,000
28 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River at Leonia, Idaho Continued

Discharge in second-feet

Maximum square 

mile

Run-off

1936-37

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1937-38 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

3,890

3,190

4,520

2,400

2,600

3,080

11,600

46,900

43,300

27,800

10,100

5,920

3,190

2,290

1,070

1,290

2,200

2,500

3,250

12,200

23,400

9,840

6,080

4,650

3,632

2,748

2,717

1,922

2,380

2,695

6,586

28,200

32,410

16,170

7,921

5,307

0.301

.234

.251

.164

.205

.250

.561

2.40

2.76

1.58

.675

.452

0.35

.26

.27

.19

.21

.27

.63

2.77

3.08

1.59

.78

.50

46,900 1,070 .802 10.90

10,600

10,800

7,110

6,430

4,000

6,740

51,100

82,800

71,100

33,700

10,800

6,680

4,340

5,050

2,600

2,760

2,570

3,510

5,200

23,900

35,700

11,100

5,990

5,050

4,829

6,768

4,252

4,463

3,387

4,788

19,870

43,920

50,090

20,080

7,762

5,682

.411

.576

.362

.380

.289

.408

1.64

3.74

4.27

1.71

.661

.484

.47

.64

.42

.44

.30

.47

1.83

4.31

4.76

1.97

.76

.54

217,000

163,500

167,000

118,200

132,200

165,700

391,900

1,734,000

1,929,000

994,000

487,000

315,800

6,816,000

296,900

402,700

261,400

274,400

188,100

294,400

1,147,000

2,700,000

2,981,000

1,235,000

477,200

338,100

82,800 2,570 14,656 1.25 10,600,000

Yearly discharge of Kootenai River at Leonia, Idaho

Year ending Sept. 30

Discharge in 

second-feet

square 

mile

Inches Acre-feet

Calendar year

Discharge in 

second-feet

square 

mile

Inches

1929.

1930.

1931.

1932.

1933.

1934".

1935.

1936.

1937.

1938.

10,500

11,100

8,320

14,200

16,200

IS;380 

13,880 

10,340 

9,414 

14,640

0.894

.945

.708

1.21

1.38

1757

1.18

.881

.802

1.25

12.20

12.80

9.60

16.42

18.71

7,640,bOO

8,000,000

6,020,000

10,300,000

11.700.000

10,100

11,100

8,220

14,700

17.800

0.860

.945

.700

1.25

1.52

11.66

12.87

9.49

17.04

20.52

7,300,000

8,050,000

5,950,000

10,700,000

12.800.000

Highest. 

Average. 

Lowest..

21.25

16.04

12.00

10.90

16.91

13,310,000

10,050,000

7,508,000

6,816,000

10,600.000

16,900

13,370

10,140

9,985

14.520

17

1.14

.864

.851

1.22

19.55

15.46

11.77

11.55

16.55

12,24b;000 

9,682,000 

7,358,000 

7,229,000

10.570.000

18,580

12,700

8,520

1.57

1.08

.708

21.25

14.68

9.60

13,310,000

9,194,000

6,020,000

17,800

12,660

8,220

1.52

1.08

.700

20.52

14.64

9.49

12,800,000

9,168,000

5,950,000
KOOTENAI RIVER BASIN 29

Kootenai River at Katka, Idaho

Location.- Staff gage, lat. 48°42', long. 116°08', in NEi sec. 25, T. 62 H., R. 2 E-, at 

Katka, 3,000 feet downstream from Great Northern Railway station and 5J miles above 

Moyie River. Zero of gage is 1,700.00 feet above mean sea level, United States Coast 

and Geodetic Survey datum.

Drainage area.- 11,860 square milea.

Records available.- April 1928 to September 1933 (discontinued).

Extremes.- Maximum discharge, 96,500 second-feet June 18, 1933: maximum water-surface 

elevation, 1,796.80 feet June 18, 1933; minimum discharge (estimated), 1,750 second-feet 

Feb. 10, 1933; minimum water-surface elevation, 1,773.74 feet Dec. 11, 1929.

Remarks.- Discharge measurements made 8 miles upstream. Estimated inflow added to the 

measured discharge to obtain flow at Katka. No diversions or regulation above station.

Monthly discharge of Kootenai River at Katka, Idaho

Month

1928 

April 2-30... ................

Mav

July. .........................

The period. ................

1928-29

Mn-tr

The year ........ T ..........

1929-30

May. ..........................

1930-31

September .....................

Discharge in second-feet

Maximum

33,600 

77,800 

49,500 

44,800 

15,900 

7,990

-

15,600 

6,300

7,260 

16,200 

58,800 

59,800 

22,200 

9,750 

6,540

59,800

4,810 

3,720 

4,130 

3,570 

5,800 

6,620 

29,100 

42,400 

55,900 

27,100 

11,100 

6,380

55,900

5,120 

4,430 

3,450 

3,730 

3,350 

5,160 

10,600 

46,200 

30,800 

19,200 

8,010 

6,780

46,200

Minimum

8,240 

21,200 

30,300 

16,200 

7,990 

5,500

-

5,380 

4,590

4,150 

13,300 

21,900 

9,490 

5,960 

4,480

-

3,830 

2,380 

2,020 

2,280 

2,950 

3,330 

6,620 

18,700 

27,900 

11,100 

6,380 

4,970

2,020

4,250 

3,310 

2,170 

2,070 

2,480 

2,760 

4,120 

13,200 

18,200 

8,260 

5,090 

4,470

2,070

Mean

12,900 

55,400 

36,300 

27,900 

10,700 

6,690

-

7,660 

5,210 

3,700 

2,940 

3,150 

3,960 

6,490 

26,500 

39,900 

14,800 

7,710 

5,180

10,600

4,190 

3,120 

3,270 

2,760 

3,620 

3,880 

16,100 

23,900 

38,000 

19,800 

8,830 

5,780

11,100

4,670 

3,800 

2,880 

2,890 

2,920 

3,560 

6,070 

24,900 

24,800 

12,100 

6,320 

5,130

8,360

Per 

square 

mile

1.09 

4.67 

3.06 

2.35 

-902 

.564

-

.646 

.439 

.312 

.248 

.266 

.334 

.547 

2.23 

3.36 

1.25 

.650 

.437

.894

.353 

.263 

.276 

.233 

.305 

.327 

1.36 

2.02 

3.20 

1.67 

.745 

.487

.936

.394 

.320 

.243 

.244 

.246 

.300 

.512 

2.10 

2.09 

1^02 

.533 

.433

.705

Run- off

Inches

1,18 

5.38 

3.41 

2.71 

1.04 

.63

-

.74 

.49 

.36 

.29 

.28 

.39 

.61 

2.57 

3.75 

1.44 

.75 

.49

12.16

.41 

.29 

.32 

.27 

.32 

.38 

1.52 

2.33 

3.57 

1.92 

.86 

.54

12.73

.45 

.36 

.SB 

.28 

.26 

.35 

.57 

2.42 

2.33 

1.18 

.61 

.48

9.57

Acre-feet

742,000 

3,410,000 

2,160,000 

1,720,000 

658,000 

398,000

9,090,000

421,000 

310,000 

228,000 

181,000 

175,000 

243,000 

386,000 

1,630,000 

2,370,000 

910,000 

474,000 

308,000

7,690,000

258,000 

186,000 

201,000 

170,000 

201,000 

239,000 

958,000 

1,470,000 

2,260,000 

1,220,000 

543,000 

344,000

8,050,000

287,000 

226,000 

177,000 

178,000 

162,000 

219,000 

361,000 

1,530,000 

1,480,000 

744,000 

389,000 

305,000

6,060,000

527283 O - 43 - 3
30 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River at Katka, Idaho Continued

Month

1931-32

April.........................

1932-33

Discharge in second-feet

Maximum

4,430 

4,870 

3,330 

2,950 

20,500 

15,300 

21,100 

68,500 

70,300 

37,200 

12,700 

8,740

70,300

6,110 

8,260 

11,500 

5,550 

4,100 

5,650 

45,700 

60,800 

95,300 

46,000 

16,800 

12,500

95,300

Minimum

3,560 

1,980 

2,030 

1,930 

2,010 

4,670 

8,460 

19,100 

33,400 

12,900 

8,590 

5,020

1,930

4,470 

4,730 

2,850 

3,250 

1,750 

3,600 

5,920 

23,800 

46,900 

17,700 

10,100 

8,120

1,750

Mean

3,930 

3,480 

2,910 

2,630 

3,980 

6,530 

15,400 

43,400 

53,600 

20,100 

9,830 

6,570

14,400

5,150 

6,170 

5,520 

4,190 

3,180 

4,120 

13,400 

36,600 

65,400 

31,000 

12,500 

9,100

16,400

Per 

square

mile

0.331 

.293 

.245 

.222 

.336 

.551 

1.30 

3.66 

4.52 

1.69 

.829 

.554

1.21

.434 

.520 

.465 

.353 

.268 

.347 

1.13 

3.09 

5.51 

2.61 

1.05 

.767'

1.38

Run- off

Inches

0.38 

.33 

.28 

.26 

.36 

.64 

1.45 

4.22 

5.04 

1.95 

.96 

.62

16.49

.50 

.58 

.54 

.41 

.28 

.40 

1.26 

3.56 

6.15 

3.01 

1.21 

.86

18.76

Acre-feet

242,000 

207,000 

179,000 

162,000 

229,000 

402,000 

916,000 

2,670,000 

3,190,000 

1,240,000 

604,000 

391,000

10,400,000

317,000 

367,000 

339,000 

258,000 

17.7,000 

253,000 

797,000 

2,250,000 

3,890,000 

1,910,000 

769,000 

541,000

11,900^000

Yearly discharge of Kootenai River at Katka, Idaho

Year

-1 Q-*-*

Year ending Sept. 30

Discharge in 

second-feet

Mean

10,600 

11,100 

8,360 

14,400 

16,400

Per 

square 

mile

0.894 

.936 

.705 

1.21 

1.38

Run- off

Inches

12.16 

12.73 

9.57 

16.49 

18.76

Acre-feet

7,690,000 

8,050,000 

6,060,000 

10,400,000 

11,900,000

Calendar year

Discharge in 

second-feet

Mean

1-0,100 

11,200 

8,270 

14,900

Per 

square 

mile

0.852 

.944 

.697 

1.26

Run- off

Inches

11.59 

12.80 

9.47 

17.12

Acre-feet

7,320,000 

8,100,000 

6,000,000 

10,800,000
KOOTENAI RIVER BASIN 31

Kootenai River at Bonners Perry, Idaho

Location.- Wire gage, lat. 48°42'00", long. 116°18'45n , in NEi sec. 27, T. 62 N., R. 1 

E., on highway bridge at Bonners Perry. Zero of gage is 1,743.005 feet above mean 

sea level (TJ. 8. Coast and Geodetic Survey datum).

Drainage area.- 13,000 square miles.

Records available.- October 1927 to September 1938; gage heights only prior to April 

1928.May to October 1904, gage heights from point three-quarters of a mile downstream. Gage heights collected by 0. S. Weather Bureau May 1904 to September 1927.

Extremes.- Maximum discharge, 99,800 second-feet June 18, 1933; maximum water-surface 

elevation, 1,774.98 feet June 19, 1933; minimum daily discharge, 1,300 second-feet 

Feb. 8, 1936; minimum water-surface elevation, 1,741.14 feet Dec. 5, 1929. 

Maximum water-surface elevation known, 1,777.2 feet sometime in June 1894.

Remarks.- No artificial regulation or diversion above station. Stage-discharge relation 

affected by backwater from Kootenay Lake.

_________Monthly discharge of Kootenai River at Bonnera Ferry, Idaho_________

Month

Discharge in second feet

Maximum Minimum square 

mile

1928

April 2-30..........

May.................

June................

July................

August..............

September...........

The period.......

1928-29 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1929-30

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1930-31 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

36,600

82,800

52,500

45,900

16,300

8,170

9,060

23,300

31,200

16,600

8,190

5,630

14,200

60,000

37,700

28,700

11,000

6,840

1.09 

4.S2 

2.90 

2.21 

.846 

.526

1.18

5.33

3.24

2.55

.98

.59

15,900

6,550

4,750

3,700

3,600

7,700

17,800

62,700

62,200

22,900

9,930

6,660

5,520

4,760

2,840

2,590

2,900

2,820

4,420

14,600

23,000

9,670

6,060

4,580

7,900

5,410

3,840

3,030

3,260

4,150

7,06O

29,000

41,800

15,200

7,840

i5,290

.608

.416

.295

.233

.251

.319

.543

2.23

3.22

1.17

.603

.407

.70

.46

.34

.27

.26

.37

.61

2.57

3.59

1.35

.70

.45

62,700 2,590 11,200 .862 11.67

4,910

3,820

4,250

3,680

6,040

7,290

32,500

46,000

59,200

27,800

11,300

6,490

3,940

2,470

2,090

2,380

3,050

3,490

7,270

20,400

28,800

11,300

6,490

5,090

4,300

3,220

3,370

2,840

3,750

4,150

18,000

26,100

39,600

20,200

8,990

5,890

.331

.248

.259

.218

.288

.319

1.38

2.01

3.05

1.55

.692

.453

.28

.30

.25

.30

.37

1.54

2.32

3.40

1.79

.80

.51

59,200 2,090 11,700 .900

5,250

4,590

3,580

3,920

3,560

5,680

12,300

49,400

31,900

19,600

8,150

6,880

4,380

3,440

2,260

2,150

2,600

2,900

4,480

15,200

18,700

8,400

5,170

4,560

4,800

3,930

2,990

3,010

3,080

3,840

6,810

27,100

25,500

12,300

6,420

5,220

.369

.302

.230

.232

.237

.295

.524

2.08

1.96

.946

.494

.402

.43

.34

.27

.27

.25

.34

.58

2.40

2.19

1.09

.57

.45

817,000

3,690,000

2,240,000

1,760,000

676,000

407,000

9,590,000

486,000

322,000

236,000

186,000

181,000

255,000

420,000

1,780,000

2,490,000

935,000

482,000

315,000

8,090,000

264,000

192,000

207,000

175,000

208,000

255,000

1,070,000

1,600,000

2,360,000

1,240,000

553,000

350,000

8,470,000

295,000

234,000

184,000

185,000

171,000

236,000

405,000

1,670,000

1,520,000

756,000

395,000

511,000

49,400 2,160 8,780 .675 9.18 6,360,000
32 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River at Bonners Perry, Idaho Continued

Month

1931-32

1932-33

April.........................

The year. ..................

1933-34

The year ...................

1934-35

May...........................

July..........................

September. ....................

1935-36

July. .........................

Discharge In second-feet

Maximum

4,510 

5,030 

3,450 

3,080 

21,600 

16,100 

23,600 

74,700 

73,700 

38,100 

12,900 

8,870

74,700

6,090 

8,900 

12, 500 

5,920 

4,340 

6,620 

50,000 

67,900 

99,800 

47,900 

1 15,600 

12,600

99,800

26,800 

23,100 

47,000 

19,000 

11,200 

18,100 

87,800 

73,900 

70,200 

21,800 

12,300 

6,640

87,800

7,690 

19,700 

6,130 

15,000 

9,600 

7,310 

24,400 

69,000 

61,200 

40,300 

16,600 

7,750

69,000

5,160 

4,900 

3,630 

3,430 

3,000 

5,650 

41,200 

55,700 

55,700 

16,000 

7,690 

6,080

55,700

Minimum

3,640 

2,100 

2,150 

2,080 

2,160 

5,000 

9,410 

21,400 

36,500 

13,100 

8,720 

5,120

2,080

4,500 

4,970 

3,270 

3,540 

1,930 

3,810 

6,760 

26,500 

50,900 

15,600 

9,890 

8,180

1,930

7,340 

8,940 

7,930 

9,180 

6,500 

7,340 

17,700 

41,000 

21,600 

11,100 

6,640 

4,620

4,620

4,180 

5,040 

2,650 

2,000 

5,020 

4,500 

5,020 

22,800 

35,200 

17,800 

7,800 

5,170

2,000

4,020 

2,800 

2,200 

2,100 

1,300 

2,960 

2,790 

29,100 

17,500 

7,800 

5,190 

3,970

1,300

Mean

4,020 

3,620 

3,040 

2,780 

. 4,280 

7,010 

17,300 

. 47,800 

56,200 

20,600 

9,970 

6,680

15,300

5,260 

6,500 

6,000 

4,500 

3,390 

4,460 

15,200 

40,700 

70,400 

33,200 

12,600 

9,220

17,700

10, 470 

12,210 

14,910 

12,460 

9,195 

11,690 

44, 990 

56, 450 

36,090 

16,400 

8,420 

5,581

19,940

4,860 

8,863 

4,761 

5,554 

6,480 

5,647 

11,850 

39, 110 

49,160 

27, 680 

11,540 

6,510

15,200

4,783 

3,912 

3,224 

2,999 

2,086 

4,013 

19,690 

41,260 

28,750 

11,280 

6,556 

4,863

11,130

Per 

square 

mile

0.309 

.278 

.234 

.214 

.329 

.539 

1.33 

3.68 

4.32 

1.58 

.767 

.514

1.18

.405 

.500 

.462 

.346 

.261 

.343 

1.17 

3.13 

5.42 

2.55 

.969 

.709

1.36

.805 

.939 

1.15 

.958 

.707 

.899 

3.46 

4.34 

2.78 

1.26 

.648 

.429

1.53

.374 

.682 

.366 

.427 

.498 

.434 

.912 

3.01 

3.78 

2.13 

.888 

.501

1.17

.368 

.301 

.248 

.231 

.160 

.309 

1.51 

3.17 

2.21 

.868 

.504 

.374

.856

Run- off

Inches

0.36 

.31 

.27 

.25 

.35 

.62 

1.48 

4.24 

4.32 

1.82 

.88 

.57

15.97

.47 

.56 

.53 

.40 

.27 

.40 

1.30 

3.61 

6.05 

2.94 

1.12 

.79

18.44

.93 

1*05 

1.33 

1.10 

.74 

1.04 

3.86 

5.00 

3.10 

1.45 

.75 

.48

20.83

.43 

.76 

.42 

.49 

.52 

.50 

1.02 

3.47 

4.22 

2.46 

1.02 

.56

15.87

.42 

.34 

.29 

.27 

.17 

.36 

1.68 

3.66 

2.47 

1.00 

.58 

.42

11.66

Acre-feet

247,000 

215,000 

187,000 

171,000 

246,000 

431,000 

1,030,000 

2,940,000 

3,340,000 

1,270,000 

613,000 

397,000

11,100,000

323,000 

387,000 

369,000 

277,000 

188,000 

274,000 

904,000 

2,500,000 

4,190,000 

2,040,000 

775,000 

549,000

12,800,000

643,800 

726, 500 

916,900 

766,200 

510, 600 

718,500 

2,677,000 

3,471,000 

2,148,000 

1,009,000 

517,700 

332,100

14,440,000

298,800 

527, 400 

292,700 

341,500 

359,900 

347,200 

705,200 

2,405,000 

2,925,000 

1,702,000 

709,500 

387, 400

11,000,000

294,100 

232,800 

198,200 

184, 400 

120,000 

246,800 

1,172,000 

2,537,000 

1,711,000 

693,700 

403,100 

289.400

8,082.000
KOOTENAI EIVER BASIN 33

Monthly discharge of Kootenal River at Bonners Perry, Idaho Continued

Month

1936-37

September. ....................

1937-38

May...........................

July..........................

September .....................

Discharge In second-feet

Maximum

4,020 

3,280 

5,030 

2,500 

2,700 

3,380 

12,700 

52,300 

47,900 

30,200 

10,500 

6,090

52,300

10,400 

11,200 

8,230 

7,300 

4,590 

8,050 

56,000 

89,800 

78,100 

36,900 

11,100 

6,850

.89,800

Minimum

3,280 

2,220 

1,440 

1,400 

2,300 

2,600 

3,610 

13,300 

25,900 

10,200 

6,250 

4,760

1,400

4,440 

5,530 

3,100 

3,370 

2,800 

3,660 

5,980 

27,300 

38,900 

11,400 

6,080 

5,130

2,800

Mean

3,643 

2,825 

2,995 

2,026 

2,482 

2,847 

7,459 

31, 880 

36,790 

17,300 

8,203 

5,437

10,360

4,983 

7,428 

4,781 

5,047 

3,780 

5,443 

22,130 

48,950 

54,060 

21,370 

7 926 

5*808

16,010

Per 

square 

mile

0.280 

.217 

.230 

.156 

.191 

.219 

.574 

2.45 

2.83 

1.33 

.631 

.418

.797

.383 

.571 

.368 

.388 

.291 

.419 

1.70 

3.77 

4.16 

1.64 

.610 

.447

1.23

Run- off

Inches

0.32 

.24 

.27 

.18 

.20 

.25 

.64 

2.82 

3.16 

1.53 

.73 

.47

10.81

.44 

.64 

.42 

.45 

.30 

.48 

1.90 

4.35 

4.64 

1.89 

.70 

.50

16.71

Acre-feet

224,000 

168,100 

184,200 

124,600 

137,900 

175,100 

443,800 

1,960,000 

2,189,000 

1,064,000 

504, 400 

323,500

7,499,000

306,400 

442,000 

294,000 

310,300 

209,900 

334,700 

1,317,000 

3,010,000 

3,217,000 

1,314,000 

487,400 

345,600

11,590,000

Yearly discharge of Eootenai River at Bonners Perry, Idaho

Tear

TQQQ

1931..........

1932 ..........

1933 .......... i934.:.r. 7...".-

1936..........

1937..........

1938..........

Highest..,. 

Average .... 

Lowest. . ...

Tear ending Sept. 30

Discharge in 

second-feet

Mean

11,200 

11,700 

8,780 

15,300 

17,700

19;940 

15,200 

11,130 

10,360 

16,010

19,940 

13,730 

8,780

Per 

square 

mile

0.862 

' .900 

.675 

1.18 

1.36

1.53 

1.17 

.853 

.797 

1.23

1.53 

1.06 

.675

Run-off

Inches

11.67 

12.24 

9.18 

15.97 

18.44

26.85 

15.87 

11.66 

10.81 

16.71

20.83 

14.34 

9.18

Acre-feet

8,090,000 

8,470,000 

6,360,000 

11,100,000 

12,800,000

14,440jooO 

11,000,000 

8,082,000 

7,499,000 

11,590,000

14,440,000 

9,943,000 

6,360,000

Calendar year

Discharge in 

second-feet

Mean

10, 600 

11,800 

8,700 

15, 900 

19,300

IS; 330 

14,650 

10,930 

11,000 

15,620

19,300 

13,680 

8,700

Per 

square 

mile

0.815 

.908 

.669 

1.22 

1.48

1.41 

1.13 

.841 

.846 

1.20

1.48 

1.05 

.669

Run- off

Inches

11.13 

12.32 

9.08 

16.59 

20.19

19.13 

15.31 

11.44 

11.48 

16.30

20.19 

14.30 

9.08

Acre-feet

7,710,000 

8,520,000 

6,300,000 

11,500,000 

14,000,000

13;S70,000 

10,610,000 

7,934,000 

7,965,000 

11,310,000

14,000,000 

9,912,000 

6,300,000
34 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Kootenai River near Copeland, Idaho 

(International gaging station)

Location.- Water-stage recorder, lat. 48°54'45", long. 116°25'00", in NWjswi sec. 12, T. 

64 N., R. 1 W., at Andrews Ranch., three-quarters of a mile below Mission Creek and ij 

miles northwest of Copeland. Zero of gage is 1,700.00 feet above mean sea level 

(U. S. Coast and Geodetic Survey datum).

Drainage area.- 13,400 square miles.

Records ayallable.- October 1927 to May 1929 (gage heights only), May 1929 to September 

1938 (discharge records). Gage-height records collected by Dominion.Water and Power 

Bureau, Department of Mines and Resources, Canada, April 1925 to September 1927.

Extremes.- Maximum daily discharge, 90,500 second-feet June 19, 1933; maximum watersurface elevation, 1,767.98 feet June 20, 1933j minimum daily discharge, 1,350 secondfeet Feb. 8, 1936; minimum water-surface elevation, 1,739.59 feet Jan. 25, 1930.

Remarks.- Stage-discharge relation affected by backwater from Kootenay Lake. This is 

one of the international gaging stations maintained by the United States under agreement with Canada.

Monthly discharge of Kootenai River near Copeland, Idaho

Discharge in second-feet

Maximum square 

mile

1929

May.................

June................

July................

August..............

September...........

The period.......

1929-30 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1930-31 

October.............

November............

December............

January.............

February............

March...............

April...............

May.......... .......

June................

July........... .....

August..............

September...........

The year.........

1931-32 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

58,100

58,400

25,000

10,400

6,500

13,600

25,400

10,400

6,180

4,330

28,700

43,700

16,000

8,100

5,180

2.14

3.26

1.19

.604

.387

2.47

3.64

1.37

.70

.43

4,980

3,890

4,310

3,710

6,000

7,070

33,300

44,300

60,200

28,400

11,300

6,590

4,020

2,500

2,S10

2,460

3,040

3,570

7,650

21,300

29,300

11,800

6,660

5,180

' 4,370

3,290

3,420

2,900

3,790

4,200

18,500

26,800

40,300

20,600

9,120

5,990

.326

.246

.255

.216

.283

.313

1.38

2.00

3.01

1.54

.681

.447

.38

.27

.29

.25

.29

.36

1.54

2.31

3.36

1.78

.79

.50

60,200 2,210 12,000 .896 12.12

5,360

4,680

3,580

4,200

3,810

6,070

11,800

50,000

32,400

20,400

8,300

7,000

4,430

3,540

2,300

2,200

2,720

3,050

4,740

14,500

18,900

8,680

5,300

4,640

4,870

3,990

3,030

3,100

3,220

4,000

7,040

28,100

26,200

12,600

6,500

5,310

.363

.298

.226

.231

.240

.299

.525

2.10

1.96

.940

.485

.396

.42

.33

.26

.27

.25

.34

.59

2.42

2.19

1.08

.56

.44

50,000 2,200 9,020 .673 9.15

4,560

4,980

3,440

3,100

22,700

17,200

25,400

74,500

73,500

38,700

12,900

8,880

3,680

2,140

2,190

2,170

2,210

5,270

10,400

23,000

37,100

13,000

8,800

5,180

4,060

3,650

3,040

Si, 810

4,440

7,540

18,800

49,100

57,100

21,300

10,100

6,770

.303

.272

.227

.210

.331

.563

1.40

3.66

4.26

1.59

.754

.505

.35

.30

.26

.24

.36

.65

1.56

4.22

4.75

1.83

.87

.56

1,760,000

2,600,000

984,000

498,000

308,000

6,150,000

269,000

196,000

210,000

 178,000

210,000

258,000

1,100,000

1,650,000

2,400,000

1,270,000

561,000

356,000

8,660,000

299,000

237,000

186,000

191,000

179,000

246,000

419,000

1,730,000

1,560,000

775,000

400,000

316,000

6,540,000

250,000

217,000

187,000

173,000

255,000

464,000

1,120,000

3,020,000

3,400,000

1,310,000

621,000

405,000

74,500 2,140 15,700 1.17 15.95 11,400,000
KOOTENAI RIVER BASIN 35

Monthly discharge of Kootenai River near Copeland, Idaho -Contlnjied

Month

1932-33

1933-34

1934-35

1935-36

April.........................

September. ....................

1936-37

May...........................

Discharge in second- feet

Maximum

6,310 

9,410 

12,900 

6,210 

4,500 

6,980 

50,700 

69,000 

90,500 

50,300 

17,900 

12,800

90, 500

24,300 

22,300 

43,300 

20,500 

11,800 

18,800 

86,000 

75,500 

71,700 

22,500 

12,000 

6,640

86,000

7,890 

20,200 

6,260 

14, 100 

10,200 

7,620 

25,100 

67,100 

61,800 

39,900 

16,800 

7,740

67,100

5,220 

4,950 

3,710 

3,500 

3,150 

5,800 

43,400 

57,700 

55,900 

16,500 

7,820 

5,980

57, 700

4,050 

3,350 

5,450 

2,560 

2,800 

3,570 

13,200 

52,300 

48,600 

31,000 

10, 600 

6,240

52,300

Minimum

4,490 

5,030 

3,470 

3,720 

1,990 

3,940 

7,280 

28,800 

51,700 

18,600 

9,940 

7,950

1,990

7,550 

9,630 

8,460 

10,200 

7,300 

8,150 

19,200 

46,100 

23,000 

11,500 

6,570 

4,800

4,800

4,150 

4,940 

2,930 

2,160 

5,300 

4,730 

5,210 

25,000 

34,300 

18,300 

7,820 

5,250

2,160

4,100 

2,850 

2,250 

2,150 

1,350 

3,250 

2,940 

30,000 

17,900 

7,920 

5,200 

4,090

1,350

3,400 

2,290 

1,530 

1,410 

2,290 

2,640 

3,940 

13,500 

27,200 

10,300 

6,510 

4,830

1,410

Mean

5,290 

6,690 

6,250 

4,680 

3,490 

4,610 

15,800 

43,300 

70,800 

34,100 

12,700 

9,110

18,100

10,140 

12,740 

15,470 

13, 580 

9,872 

12,230 

46,110 

59,190 

38,310 

16,390 

8,356 

5,690

20, 710

4,952 

9,092 

4,874 

5,713 

6,854 

5,881 

12,180 

40,420 

49,760 

27,750 

11,680 

6,558

15,500

4,836 

3,964 

3,295 

3,064 

2,160 

4,163 

20,880 

42,560 

29,290 

11,480 

6,611 

4,907

11,450

3,720 

3,889 

3,084 

2,069 

2,524 

2,957 

7,865 

32,850 

38,320 

17,910 

8,370 

5,488

10,700

Per 

square 

mile

0.395 

.499 

.466 

.349 

.260 

.344 

1.18 

3.23 

5.28 

2.54 

.948 

.680

1.35

.757 

.951 

1.15 

1.01 

.737 

.913 

3.44 

4.42 

2.86 

1.22 

.624 

.425

1.55

.370 

.679 

.364 

.426 

.511 

.439 

.909 

3.02 

3.71 

2.07 

.872 

.489

1.16

.361 

.296 

.246 

.229 

.161 

.311 

1.56 

3. -18 

2.19 

.857 

.493 

.366

.854

.278 

.216 

.230 

.154 

.188 

.221 

.587 

2.45 

2.86 

1.34 

.625 

.410

.799

Run- off

Inche s

0.46 

.56 

.54 

.40 

.27 

.40 

1.32 

3.72 

5.89 

2.93 

1.09 

.76

18.34

.87 

1.06 

1.33 

1.16 

.77 

1.05 

3.84 

5.10 

3.19 

1.41 

.72 

.47

20.97

.43 

.76 

.42 

.49 

.53 

.51 

1.01 

3.48 

4.14 

2.39 

1.01 

.55

15.72

.42 

.33 

.28 

.26 

.17 

.36 

1.74 

3.67 

2.44 

.99 

.57 

.41

11.64

.32 

.24 

.27 

.18 

.20 

.25 

.65 

2.82 

3.19 

1.54 

.72 

.46

10.84

Acre- feet

325,000 

398,000 

384,000 

288,000 

194,000 

283,000 

940,000 

2,660,000 

4,210,000 

2,100,000 

781,000 

542,000

13,100,000

623,600 

757,800 

950,900 

835,200 

548,300 

751,800 

2,744,000 

3,640,000 

2,279,000 

1,008,000 

513,800 

338,600

14,990,000

304,500 

541,000 

299,700 

351,300 

380,600 

361,600 

724,800 

2,485,000 

2,961,000 

1,706,000 

718,100 

390,200

11,220,000

297,400 

235,900 

202,600 

188, 400 

124,300 

256,000 

1,243,000 

2,617,000 

1,743,000 

705,800 

406,500 

292,000

8,312,000

228,700 

171,900 

189,600 

127,200 

140,200 

181,800 

468,000 

2,020,000 

2,280,000 

1,101,000 

514.700 

326.600

7,750,000
36 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River near Copeland, Idaho--Continued

Month

1957-58

Ma?

July. .........................

September .....................

Discharge in sec.ond-feet

Maximum

9,540 

11,500 

9,000 

8,150 

4,820 

9,510 

55,700 

87,400 

80,500 

39,400 

10,900 

6,880

87,400

Minimum

4,700 

5,990 

5,540 

3,630 

5,000 

5,890 

6,870 

28,700 

42,000 

11,200 

6,160 

5,220

5,000

Mean

5,141 

7,632 

5,115 

5,497 

4,009 

6,121 

25,070 

48,640 

56,840 

22,080 

8,107 

5,895

16,540

Per 

square 

mile

0.584 

.570 

.582 

.410 

.299 

.457 

1.72 

5.65 

4.24 

1.65 

.605 

.440

1.25

Run-off

Inches

0.44 

.64 

.44 

.47 

.31 

.53 

1.92 

4.18 

4.73 

1.90 

.70 

.49

16.75

Acre- feet

516,100 

454,100 

314,500 

558,000 

222,700 

576,400 

1,575,000 

2,991,000 

5,582,000 

1,558,000 

498,500 

350,800

11,980,000

Yearly discharge of Kbotenai River near Copeland, Idaho

Year

1950..........

1 Q^l

1 Q^O

1954..........

1 Q^fi

1957 ..........

1 Q^fl

Year ending Sept. 30

Discharge in 

second-feet

Mean

12,000 

9,020 

15,700 

18,100 

20.710

15,500 

11,450 

10,700 

16,540

Per 

square 

mile

0.896 

.675 

1.17 

1.35 

1.55

1.16 

.854 

.799 

1.25

Run-off

Inches

12.12 

9.15 

15.95 

18.54 

20.97

15.72 

11.64 

10.84 

16.75

Acre-feet

8,660,000 

6,540,000 

11,400,000 

15,100,000 

14.990.000

11,220,000 

8,312,000 

7,750,000 

11,980,000

Calendar year

Discharge in 

second-feet

Mean

12,000 

8,930 

16,500 

19,800 

19.070

14,940 

11,250 

11,590 

16,120

Per square' 

mile

0.896 

.666 

1.22 

1.48 

1.42

1.11 

.840 

.850 

1.20

Run- off

Inches

12.19 

9.05 

16.60 

20.04 

19.52

15.14 

11.44 

11.55 

16.55

Acre- feet

8,700,000 

6,470,000 

11,900,000 

14,500,000 

13,800,000

10,810,000 

8,166,000 

8,244,000 

11,670,000

Kootenai River at Port Hill, Idaho 

(International gaging station)

Location.- Water-stage recorder, lat. 49°OO t OO", long. 116°30'10", in SW^ sec. 8, T. 65 

N., R. 1 W., 300 feet south of international boundary at Port Hill. Datum of gage is 

1,700.00 feet above mean sea level, TJ. 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.

Records available.- May to July 1904 and October 1927 to April 1928 (gage heights only), 

April 1928 to September 1938. October 1924 to September 1927 (gage heights only) in 

reports of Dominion Water and Power Bureau, Department of Mines and Resources, Canada.

Extremes.- Maximum daily discharge, 93,200 second-feet June 19, 1953; maximum elevation, 

1,764.08 feet May 31, 1938; minimum daily discharge, 1,380 second-feet Feb. 8, 1956; 

minimum elevation, 1,739.32 feet Jan. 28, 1930.

Maximum elevation known, 1,772.7 feet June 1894.

Remarks.- Records include flow of Boundary Creek and represent entire flow passing international boundary. Elevations affected by backwater from Kootenay Lake. This is one 

of the international gaging stations maintained by the United States under agreement 

with Canada.

Monthly discharge of Kootenai River at Port Hill, Idaho

Month

1928

July. .........................

September .....................

Discharge in second-feet

Maximum

34,500 

83,000 

70,000 

45,000 

16,200 

7,850

-

Minimum

11,000 

25,500 

32,500 

16,900 

8,000 

5,400

-

Mean

15,600 

60,000 

40,400 

29,000 

10,800 

6,560

-

Per 

square 

mile

1.14 

4.38 

2.95 

2.12 

.788 

.479

-

Run-off

Inches

1.27 

5.05 

3.29 

2 -.44 

.91 

.53

-

Acre- feet

928,000 

3,690,000 

2,400,000 

1,780,000 

664,000 

390,000

9,850,000
KOOTENAI RIVER BASIN 37

Monthly discharge of Kootenai River at Port Hill, Idaho Continued

Month

1928-29

1929-30

1930-31

April.........................

May...........................

1931-32

May. ..........................

September .....................

1932-33

April.........................

May...........................

September .....................

Discharge in second-feet

Maximum

15,000 

5,900 

4,150 

3,600 

3,400 

7,500 

15,800 

59,000 

59,500 

25,000 

10,500 

6,500

£9,500

5,050 

3,930 

4,360 

3,750 

5,980 7,010' 

35,000 

44,600 

61,200 

28,800 

11,400 

6,670

61,200

5,480 

4,800 

3,670 

4,400 

3,930 

6,260 

12,600 

52,000 

33,200 

21,200 

8,400 

7,150

52,000

4,590 

5,080 

3,510 

3,150 

26,200 

17,900 

26,400 

77,200 

75,400 

39,300 

13,000 

8,940

77,200

6,400 

9,750 

13,700 

6,360 

4,590 

7,110 

52,300 

72,300 

93,200 

51,900 

18,100 

12,900

93,200

Minimum

5,350 

4,200 

2,900 

2,400 

2,500 

2,600 

4,500 

13,700 

26,000 

10,500 

6,100 

4,300

2,400

4,080 

2,520 

2,290 

2,500 

3,060 

3,630 

7,820 

22,400 

29,700 

12,100 

6,770 

5,250

2,290

4,490 

3,610 

2,340 

2,240 

2,840 

3,120 

4,870 

15,700 

19,300 

8,800 

5,400 

4,700

2,240

3,710 

2,210 

2,260 

2,220 

2,250 

5,510 

10,800 

24,100 

39,200 

15,100 

8,860 

5,210

2,210

4,530 

5,120 

3,640 

3,840 

2,060 

4,020 

7,430 

29,800 

53,400 

18,800 

10,000 

8,100

2,060

Mean

7,490 

4,900 

3,560 

2,830 

3,010 

4,200 

6,790 

29,200 

44,600 

16,200 

7,940 

5,150

11,300

4,430 

3,330 

3,450 

2,950 

3,820 

4,260 

19,500 

27,900 

40,900 

20,800 

9,220 

6,060

12,200

4,940 

4,040 

3,090 

3,190 

3,310 

4,120 

7,580 

29,600 

26,900 

12,800 

6,560 

5,380

9,310

4,110 

3,740 

3,110 

2,860 

4,790 

7,830 

19,600 

51,400 

58,900 

21,500 

10,200 

6,810

16,200

5,370 

6,930 

6,500 

4,810 

3,580 

4,700 

16,200 

45,100 

73,700 

34, 700 

12,900 

9,210

18,700

Per 

square 

mile

0.547 

.358 

.260 

.207 

.220 

.307 

.496 

2.13 

3.26 

1.18 

.580 

.376

.825

.323 

.243 

.252 

.215 

.279 

.311 

1.42 

2.04 

2.99 

1.52 

.673 

.442

.891

0.361 

.295 

.226 

.233 

.242 

.301 

.539 

2.16 

1.96 

.934 

.479 

.393

.680

0.300 

.273 

.227 

.209 

.350 

.572 

1.43 

3.75 

4.30 

1.57 

.745 

.497

1.18

.392 

.506 

.474 

.351 

.261 

.343 

1.18 

3.29 

5.38 

2.53 

.942 

.672

1.36

Run- off

Inches

0.63 

.40 

.30 

.24 

.23 

.35 

.55 

2.46 

3.64 

1.36 

.67 

.42

11.25

.37 

.27 

.29 

.25 

.29 

.36 

1.58 

2.35 

3.34 

1.75 

.78 

.49

12.12

0.42 

.33 

.26 

.27 

.25 

.35 

.60 

2.49 

2.19 

. 1.08 

.55 

.44

9.23

0.35 

.30 

.26 

.24 

.38 

.66 

1.60 

4.32 

4.80 

1.81 

.86 

.55

16.13

.45 

.56 

.55 

.40 

.27 

.40 

1.32 

3.79 

6.00 

2.92 

1.09 

.75

18.50

Acre-feet

461,000 

292,000 

219,000 

174,000 

167,000 

258,000 

404,000 

1,800,000 

2,650,000 

996,000 

488,000 

306,000

8,220,000

272,000 

198,000 

212,000 

181,000 

212,000 

262,000 

1,160,000 

1,720,000 

2,430,000 

1,280,000 

567,000 

361,000

8,860,000

304,000 

240,000 

190,000 

196,000 

184,000 

253.000 

439,000 

1,820,000 

1,600,000 

787,000 

403,000 

320,000

6,740,000

253,000 

223,000 

191,000 

176,000 

276,000 

481,000 

1,170,000 

3,160,000 

3,500,000 

1,320,000 

627,000 

405,000

11,800,000

330,000 

412,000 

400,000 

296,000 

199,000 

289,000 

964,000 

2,770,000 

4,390,000 

2,130,000 

793,000 

548,000

13,500,000
38 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kootenai River at Port Hill, Idaho--Continued

Month

1933-34

April.........................

July. .........................

1934-35

1935-36

April.........................

July. ..........................

September. ....................

1936-37

April.........................

*

1937-38

July. .........................

Discharge in second-feet

Maximum

25,000 

22,800 

44,400 

21,000 

12,000 

19,400 

89,300 

77,500 

72,900 

22,700 

12,100 

6,670

89,300

8,050 

21,200 

6,500 

14,500 

10,500 

7,820 

25,700 

69,400 

64,300 

40,800 

16,900 

7,790

69,400

5,300 

5,000 

3,750 

3,540 

3,190 

5,850 

45,400 

59,800 

56,900 

16,600 

7,860 

6,040

59,800

4,080 

3,370 

5,520 

2,590 

2,830 

3,630 

13,500 

54,300 

50,200 

31,600 

10,700 

6,290

54,300

9,750 

11,500 

9,280 

8,390 

4,930 

9,560 

55,800 

91,100 

83,200 

40,100 

11,000 

6,930

91,100

Minimum

7,690 

9,900 

8,720 

10,400 

7,470 

8,330 

19,700 

48,300 

23,200 

11,600 

6,600 

4,840

4,840

4,180 

5,130 

3,050 

2,330 

5,450 

4,850 

5,340 

25,800 

35,100 

18,400 

7,880 

5,290

2,330

4,140 

2,900 

2,290 

2,190 

1,380 

3,290 

2,990 

31,500 

18,100 

7,960 

5,220 

4,120

1,380

3,430 

2,320 

1,550 

1,430 

2,320 

2,670 

4,000 

13,900 

28,000 

10,400 

6,560 

4,880

1,430

4,780 

6,220 

3,470 

3,720 

3,100 

4,000 

7,040 

29,800 

42,800 

11,300 

6,200 

5,260

3,100

Mean

10,400 

13,100 

15,880 

13,890 

10,070 

12,500 

48,000 

61,400 

38,990 

16,520 

8,405 

5,729

21,270

5,016 

9,511 

5,033 

5,904 

7,062 

6,040 

12,490 

42,260 

51,510 

28,150 

11,760 

6,603

15,970

4,892 

4,014 

3,335 

3,104 

2,192 

4,216 

21,710 

44,550 

29,750 

11,570 

6,643 

4,945

11,760

3,750 

2,917 

3,123 

2,099 

2,554 

2,996 

8,038 

34,360 

39,890 

18,150 

8,450 

5,545

11,030

5,260 

7,914 

5,294 

5,659 

4,110 

6,289 

23,970 

51,020 

58,830 

22,380 

8,169 

5,932

17,100

Per 

square 

mile

0.759 

.956 

1.16 

1.01 

.735 

.912 

3.50 

4.48 

2.85 

1.21 

.614 

.418

1.55

.366 

.694 

.367 

.431 

.515 

.441 

.912 

3.08 

3.76 

2.05 

.858 

.482

1.17

.357 

.293 

.243 

.227 

.160 

.308 

1.58 

3.25 

2.17 

.845 

.485 

.361

.858

.274 

.213 

.228 

.153 

.186 

.219 

.587 

2.51 

2.91 

1.32 

.617 

.405

.805

.384 

.578 

.386 

.413 

.300 

.459 

1.75 

3.72 

4.29 

1.63 

.596 

.433

1.25

Run- off

Inches

0.88 

1.07 

1.34 

1.16 

.77 

1.05 

3.90 

5.16 

3.18 

1.40 

.71 

.47

21.09

.42 

.77 

.42 

.50 

.54 

.51 

1.02 

3.55 

4.20 

2.36 

.99 

.54

15.82

.41 

.33 

.28 

.26 

.17 

.36 

1.76 

3.75 

2.42 

.97 

.56 

.40

11.67

.32 

.24 

.26 

.18 

* .19 

.25 

.65 

2.89 

3.25 

1.52 

.71 

.45

10.91

.44 

.64 

.44 

.48 

.31 

.53 

1.95 

4.29 

4.79 

1.88 

.69 

.48

16.92

Acre-feet

639,200 

779,300 

976,600 

853,900 

559,500 

768,800 

2,856,000 

3,775,000 

2,320,000 

1,016,000 

516,800 

340,900

15,400,000

308,400 

' 565,900 

309,500 

363,000 

392,200 

371,400 

743,300 

2,599,000 

3,065,000 

1,731,000 

723,400 

392,900

11,560,000

300,800 

238,900 

205,100 

190,900 

126,100 

259,200 

1,292,000 

2,739,000 

1,770,000 

711,300 

408,400 

294,200

8,536,000

.. 230,600 

173,600 

192,000 

129,000 

141,800 

184,200 

478,300 

2,113,000 

2,374,000 

1,116,000 

519,600 

330,000

7,982,000

323,400 

470,900 

325,500 

348,000 

228,300 

386,700 

1,427,000 

3,137,000 

3,501,000 

1,376,000 

502,300 

' 353,000

12,380,000
KOOTENAI RIVER BASIN 39

Yearly discharge of Kootenai River at Port Hill, Idaho

Year

1929

T o^n

i Q*in

1 Q^&

1933...........

1934. ..........

T 0*^*7

1938. ..........

Lowest. .....

Year ending Sept. 30

Discharge In 

second-feet

Mean

11,300 

12,200 

9,310 

16,200 

18,700

21,270 

15,970 

11,760 

11,030 

17,100

21,270 

14,480 

9,310

Per 

square 

mile

0.825 

.891 

.680 

1.18 

1.36

1.55 

1.17 

.858 

.805 

1.25

1.55 

1.06 

.680

Run- off

Inches

11.25 

12.12 

9.23 

16.13 

18.50

21.09 

15.82 

11.67 

10.91 

16.92

21.09 

14.36 

9.23

Acre-feet

8,220,000 

8,860,000 

6,740,000 

11,800,000 

13,500,000

15,400,000 

11,560,000 

8,536,000 

7,982,000 

12,380,000

15,400,000 

10,500,000 

6,740,000

Calendar year

Discharge in 

second-feet

Mean

10,900 

12,300 

9,210 

16,900 

20,400

19,600 

15,370 

11,550 

11,750 

16,650

20,400 

14,460 

9,210

Per 

square 

mile

0.796 

.898 

.672 

1.23 

1.49

1.43 

1.12 

.843 

.858 

1.22

1.49 

1.06 

.672

Run- off

Inches

10.85 

12.20 

9.13 

16.78 

20.23

19.41 

15.23 

11.47 

11.61 

16.50

20.23 

14.34 

9.13

Acre-feet

7,920,000 

8,910,000 

6,670,000 

12,300,000 

'14,800,000

14,190,0.00 

11,130,000 

8,387,000 

8,506,000 

12,060,000

14,800,000 

10,490,000 

6,670,000

Grave Creek near Portine, Mont.

Location.- Wire-weight gage, lat. 48°49', long. 114°52', in SWi sec. 5, T. 35 N., R. 25 

W., 6 miles northeast of Fortine and 12 miles southeast of Eureka.

Records available.- April 1923 to June 1924.

Extremes.- Maximum discharge observed, 690 second-feet June 11, 1923 (gage height, 3.00 

feet}; minimum observed, 18 second-feet Apr. 1-5, 1924 (gage height, 0.86 foot).

Remarks.- No diversion or regulation.

Monthly discharge of Grave Creek near Fortine, Mont.

Month

1923

1923-24

May

July. ..........................................

Discharge in second-feet

Maximum

148 

566 

690 

318 

108 

62

-

45 

40 

113

103 

518 

447

Minimum

65 

75 

341 

103 

62 

45

-

34 

27 

29

18 

129 

186

Mean

95.9 

367 

472 

190 

80.2 

52.0

-

38.8 

32.2 

48.7

45.9 

383 

331

Run- off 

In 

acre-feet

2,850 

22,600 

28,100 

11,700 

4,930 

3,090

73,000

2,390 

1,920 

2,800

2,730 

23,600 

19,700

Granite Creek near tibby, Mont.

Location.- Staff gage, lat. 48°18', long. 115°35', in SE-J sec. 5, T. 29 N., R. 31 W., at

Glacier silver-lead mine, 7 miles southwest of Libby. 

Drainage area.- S3.6 square miles.

Records available.- January to September 1933, August 1936 to September 1938. 

Extremes.- Maximum discharge observed, 1,960 second-feet Apr. 18, 1938 (gage height, 4.40

feet}; no flow Jan. 4, 1933 (creek blocked by snow slide). 

Remarks.- No regulation or diversion of Importance.
40 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Granite Creek near Libby, Mont.

Month

April ..........................................

July. ..........................................

Calendar year 1933 ...........................

May............................................

Discharge In second-feet

Maximum

51 

61 

33 

344 

494 

948 

217 

58 

60

.

232 

583 

1,170

1,170

9.1 

11

12 

6.0 

18

26 

142 

415 

390 

104 

24 

16

415

82 

' 67 49 -

415

43 

23 

70 

1,960 

523 

440 

89 

16 

16

1,960

Minimum

0 

12 

12 

30 

95 

202 

52 

21 

17

21 

44 

40

0

9.1 

4.5

4.5 

4.8 

4.8

24 

142 

101 

19 

6.0 

4.3

-

4.5 

19 

16

-

18 

9.1 

14 

32 

115 

92 

18

5.1

4.5

Mean

26.3 

18.4 

18.0 

97.9 

193 

434 

134 

37.5 

31.6

74.0 

92.5 

158

110

9.10 

.7.28

7.67 

5.35 

8.71 

3.94 

4.50 

8.97 

75.6 

270 

189 

45,2 

12.8 

7.79

53.5

15.8 

37.5 

26.0

58.3

26.7 

15.6 

32.7 

258 

276 

188 

44.8 

10.2 

8.38

78.4

Run-off 

In 

acre-feet

1,620 

1,020 

1,110 

5,830 

11,900 

25,800 

8,240 

2,310 

1,880

59,700

4,550 

5,500 

9,720

79,500

199 

423.

471 

318 

536 

242 

250 

551 

4,500 

16,620 

11,250 

2,780 

787 

464

38,770

973 

2,230 

1,600

42,250

1,640 

865 

2,010 

15,380 

16,960 

11,200 

2,750 

626 

498

56,730

Boulder Creek near Leonia, Idaho

Location.- Water-stage recorder, lat. 48°36', long. 116°06', in NWi sec. 32, T. 61 N., R. 

3 E., half a mile downstream from McGinty Creek, 1 mile upstream from buildings of the 

Idamount Lead-Zinc Mines Co., 3 miles upstream from mouth, and 3 miles southwest of 

Leonia.

Drainage area.- 53 square miles.

Records available.- November 1928 to September 1938. April to September 1928, at site It 

miles downstream.

Extremes.- Maximum discharge, 2,050 second-feet Apr. 18, 1938 (gage height, 5.50 feet); 

minimum, 2 second-feet Aug. 25, Sept. 5, 1931.

Remarks.- Prior to 1936 some water was diverted above station for mining purposes during 

certain periods and returned to creek below. Estimates of the average diversion are 

as follows: April to September 1929, 2 second-feet; October 1929 to June 1931, 1 

second-foot; July to September 1931, 2 second-feet; June to September 1932, 2 secondfeet; June to October 1934, 3 second-feet; June to October 1935, 1.5 second-feet.
KOOTENAI RIVER BASIN 41

Monthly discharge of Boulder Creek near Leonla, Idaho

Month

Discharge In second-feet

MB xl imam Mln: square 

mile

Run-off

Inches Acre-feet

1928

May 19-31...........

June................

July................

August..............

September 1 .........

The period.......

1928-29 

November 20-30......

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The period........

1929-30 

October..............

November.............

December.............

January...............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year..........

1930-31 

October..............

November.............

December..............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year..........

1931-32 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September...........:

The year..........

880

263

102

17

9

226

488

641

215

31

19

14

17

12

194

165

177

568

292

234

37

9

10

568

32

23

12

86

105

147

472

677

123

32

6

12

677

27

62

23

1,100

200

626

1,040

540

52

8

376

54

14

9

613

126

44.6

11.1

9.0

10.6 

2.17 .76' 

.19! 

.155

5.13

2.42

.89

.22

.01

19

8

7.1

40

218

31

6.7

6.0

5.1

21.9 

14,6 

10.2 

9.6! 

37.6

146

387

112 

16.9 

13.3 

8.36

25

180

105

38

9

6

5

8.5

8.7

28.0

11.4

44.8

50.7

342

177

92.9

18.7

6.9

7.2

66.0 1.25

8

10

5

23

66

135

38

6

2

2

12.4

13.1

9.2

19.3

25.1

54.3

190

377

62.3

14.6

3.8

7.2

66.1 16.92

182

278

57

12.6

20.6

16.7

16.0

116

97.2

361

626

226

26.0

6.3

5.9

15,800

7,500

2,740

682

18

26,700

478

898

627

534

2,310

8,690

23,800

6,660

1,040

818

497

46,400

523

518

1,720

701

2,490

3,120

20,400

10,900

5,530

1,150

424

428

47,900

762

780

566

1,190

1,390

3,340

II,300

23,200

3,710

898

234

428

47,800

775

1,230

1,030

984

6,670

5,980

21,500

38,500

13,400

1,600

418

351

1,100 127 2.40 52.67 92.400
42 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Boulder Creek near Leonia, Idaho' Continued

Discharge In second-feet

Maximum

Per 

square 

mile

Run-off

Acre-feet

1932-33 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1933-34 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1934-35 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1935-36 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1936-37 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

48

364

398

103

88

1,010

1,040

868

175

25

51

1,040

428

404

178

394

1,040

739

140

27

7

9

165

1,880

79

250

98

128

485

992

668

96

15

11

1,280

866

788

138

27

7

16

866

132

30

381

722

460

106

31

26

72

391

189

20

5

4

16.3

112

103

48.2

28.4

40.7

272

644

512

75.4

11.2

17.6

0.308

2.11

1.94

.909

.536

.768

5.13

12.2

9.66

1.42

.211

.332

0.36

.24

2.24

1.05

.56

.89

5.72

14.07

10.78

1.64

.24

.37

157 2.96 40.27

16

58

116

99

93

265

158

30

5

4

4

58.4

106

293

187

131

167

626

422

70.9

13.3

4.4

5.6

174 44.52

56

35

25

53

44

54

376

82

15

8

22.9

222

53.3

65.9

71.8

67.4

195

623

241

44.5

11.4

8.0

136 2.57 34.81

14

14

160

26

7

4

5

8.7

11.3

9.6

9.9

7.8

21.1

367

435

71.3

16.3

5.7

9.0

.164

.213

.181

.187

.147

.398

6.92

8.21

1.35

.308

.108

.170

.19

.24

.21

.22

.16

.46

7.72

9.46

1.51

.36

.12

.19

81.1 1.53 20.34

9

29

269

115

17

10

7.3

19.4

7.9

8.4

16.4

120

527

243

46.5

15.0

11.0

.175 

.138 

.366 

.149 

.158 

.309 

2.26 

9.94 

4.58 

.877 .283- 

.208

.20

.15

.42

.17

.16

.36

2.52

11.46

5.11

1.01

.33

.23

1,000

6,660

6,330

2,960

1,580

2,500

16,200

39,600

30,500

4,640

689

1,050

114,000

3,590

6,310

18,040

11,500

7,260

10,270

37,250

25,970

4,220

817

268

533

125,800

1,410

13,240

3,280

4,050

3,990

4,140

11,630

38,290

14,340

2,740

700

478

538

674

589

609

446

1,300

21,840

26,740

4,240

1,000

349

534

58,860

573

434

1,190

488

464

1,010

7,110

32,410

14,460

2,860

924

653

722 86.4 1.63 22.12 62,580
KOOTENAI RIVER BASIN 43

Monthly discharge of Boulder Creek near Leonia, Idaho Continued

Month

1937-38

May...........................

The year ...................

Discharge in second-feet

Maximum

94

209 

218 

187 

59 

133 

1,570 

876 

456 

57 

14 

12

1,570

Minimum

11 

26 

30 

35 

. 29 

33 

68 

331 

63 

IS 

8 

7

7

Mean

20.4 

92.2 

74.3 

72.7 

39.7 

66.4 

408 

582 

206 

31.2 

10.5 

8.8

135

Per" 

square 

mile

0,385 

1.74 

1.40 

1.37 

.749 

1.25 

7.70 

11.0 

3.89 

.589 

.198 

.166

2.55

Run- off

Inches

0.44 

1.94 

1.61 

1.58 

.78 

1.44 

8.59 

12.68 

4.34 

.68 

.23 

.19

35.50

Acre-feet

1,260 

5,490 

4,570 

4,470 

2,200 

4,080 

24 ,300 

35,790 

12,240 

1,920 

643 

522

97,480

Note.- Monthly figures of discharge in second-feet per square mile and run-off in 

inches not published for water years 1929 to 1932, 1934, and 1935 because of diversion around gage as given under "Remarks;" diversion is a small percentage of yearly 

flow.

Yearly discharge of Boulder Creek near Leonia, Idaho

Year

1 Q*^1

1932

1 Q*^*^

1934.........

1935.........

1 Q1* Tf

1938.........

Year ending Sept. 30

Discharge in 

second-feet

Mean

66.0 

66.1 

127 

157 

174

136 

81.1 

86.4 

135

Per 

square 

mile

1.25 

1.25 

2.40 

2.96 

3.28

2.57 

1.53 

1.63 

2.55

Run- off

Inches

16.90 

16.92 

32.67 

40.27 

44.52

34.81 

20.34 

22.12 

34.50

Acre-feet

47,900 

47,800 

92,400 

114,000 

125,800

98 ,290 

58,860 

62,580 

97 ,480

Calendar year

Discharge in 

second-feet

Mean

65.1 

67.3 

142 

176 

160

113 

81.6 

99.0 

123

Per 

square 

mile

1.23 

1.27 

2.68 

3.32 

3.02

2.13 

1.54 

1.8? 

2,32

Run- off

Inches

16.57 

17.25 

36.56 

45.20 

40.97

29.12 

20.97 

25.34 

31.51

Acre-feet

47,300 

48,700 

103,000 

128,000 

115,800

82,160 

59,260 

71,700 

88,970

Moyie River at Eastport, Idaho 

(International gaging station)

Location.- Water-stage recorder, lat. 49°00, long. 116°11', in SE^ sec. 10, T. 65 N., 

R- 2 E., at Eastport, 1,000 feet downstream from international boundary.

Drainage area.- 570 square miles.

Records available.- August 1929 to September 1938 in reports of Geological Survey.

January to December 1915, March to December 1916, and discharge measurements during 

1914 and 1917, in reports of the Dominion Water and Power Bureau of the Department of 

Mines and Resources, Canada.

Extremes.- Maximum discharge, 6,240 second-feet Apr. 28, 1934 (gage height, 9.46 feet); 

minimum, 23 second-feet Nov. 7, 1936 (gage height, 3.20 feet).

Remarks.- No diversions or regulation above station. This is one of the international 

gaging stations maintained by the United States under agreement with Canada.
44 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Moyie River at Bastport, Idaho

Month

Discharge in second-feet

Maximum Minimum Mean square 

mile

Run-off

Inches Acre-feet

1929

August 26-31......

September.........

The period ....

1929-30 

October............

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1930-31 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1931-32 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1932-33 

October...........

November..........

December...........

January...........

February..........

March......'.......

April..............

May...............

June...............

July..............

August.............

September..........

The year........

85

71

110

' 83

160

543

2,960

3,180

3,100

605

145

85

3,180

106

81

96

117

318

1,270

2,800

1,060

308

88

70

2,800

69

122

1,060

620

2,030

5,320

3,580

642

125

77

5,320

141

500

900

250

352

4,020

4,920

4,830

1,510

218

182

68.2

0.120

.120

0.03 

.13

813

4,060

4,870

58

40

35

34

54

90

511

1,460

626

154

71

64.0

56.7

62.4

53.4

80.5

171

1,560

1,910

1,360

308

100

73.4

.112 

-099 

.109 

.094 

.141 

.300 

2.74 

3.35 

2.39 

.540 

.175 

.129

.15

.11

.13

.11

.15

.35

3.06

3.86

2.67

.62

.20

.14

3,940

3,370

3,840

3,280

4,470

10,500

92,800

117,000

80,900

18,900

6,150

4,370

34 484 .849 11.53 350,000

60

83

, 210

1,110

314

90

50

46

79.0 

85.V 

68.3 

71.6 

81.2

156

524 

1,830

526

175 

64.0 

56.1

.139

.150

.120

.126

.142

.274

.919

3.21

.923

.307

.112

.098

.16

.17

.14

.15

.15

.32

1.03

3.70

1.03

.35

.13

.11

4,860

5,100

4,200

4,400

4,510

9,590

31,200

113,000

31,300

10,800

3,940

3,340

312 .547 7-44 226,000

250

635

1,710

711

133

73

55

55.3

86.5

84.9

91.8

191

367

1,360

3,400

2,070

318

93.1

61.8

.097

.152

.149

.161

.335

.644

2.39

5.96

3.63

.558

.163

.108

.11

.17

.17

.19

.36

.74

2.67

6.87

4.05

.64

.19

.12

3,400

5,150

5,220

5,640

11,000

22,600

80,900

209,000

123,000

19,600

5,720

3,680

50 682 1.20 16.28 495,000

52

108

210

150

122

368

1,980

1,620

230

103

101

246

370

198

131

172

1,220

3,120

3,530

675

148

123

.151

.432

.649

.347

.230

.302

2.14

5.47

6.19

1.18

.260

.216

.17

.48

.75

.40

.24

.35

2.39

6.31

6.91

1.36

.30

.24

5,290

14,600

22,800

12,200

7,280

10,600

72,600

192,000

210,000

41,500

9,100

7,320

4,920 52 836 1.47 19.90 605.000
KOOTENAI RIVER BASIN 45

Monthly discharge of Moyie River at Eastport, Idaho Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Per 

square 

mile

Run-off

Inches Acre-feet

1933-34

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1934-35 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1935-36 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1936-37 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1937-38 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

527283 O - 43 - 4

1,500

1,100

2,000

1,040

565

1,110

6,100

4,210

2,010

363

115

76

6,100

148

387

230

600

399

330

2,070

4,210

3,400

868

244

112

4,210

132

140

86

83

75

177

3,440

3,220

1,310

246

72

93

3,440

57

48

124

148

1,110

3,220

2,590

926

235

109

3,220

209

468

445

339

300

664

5,570

5,740

4,280

876

167

84

5,740

137

447

340

425

362

362

1,040

2,250

382

121

59

53

641

718

647

454

626

3,303

3,095

918

208

81.8

60.6

0.593

1.12

1.26

1.14

.796

1.10

5.79

5.43

1.61

.365

.144

.106

0.68

1.25

1.45

1.31

.83

1.27

1.80 

.42 

.17 

.12

53 925 1.62

55

100

100

90

226

188

219

1,670

804

255

115

64

78.1

249

174

241

296

255

905

2,742

1,978

503

166

87.2

.137

.437

.305

.423

.519

.447

1.59

4.81

3.47

.882

.291

.153

.16

.49

.35

.49

.54

.52

1.77

5.55

3.87

1.02

.34

.17

 55 641 1.12 15.27

65

70

67

65

65

90

99

1,310

262

74

46

46

85.3

87.4

75.5

74.5

67.8

131

1,656

2,327

652

150

58.1

59.6

.150

.153

.132

.131

.119

.230

2.91

4.08

1.14

.263

.102

.105

.17

.17

.15

.15

.13

.27

3.25

4.70

1.27

.30

.12

.12

46 452 .793 10.80

160

1,190

1,040

180

86

71

49.'1 

42.2 

56.3 

41.9 

54.7 

79.4

514 

2,405 

1,920

401

131 

81.1

.074

.099

.074

.096

.139

.902

4.22

3.37

.704

.230

.142

.10

.08

.11

.09

.10

.16

1.01

4.86

3.76

.81

.27

.16

483 .847 11.51

84

177

130

140

170

209

423

2,130

951

177

73

57

115

316

233

245

203

385

2,179

3,644

2,200 421-

112

68.

.202

.554

.409

.430

.356

.675

3.82

6.39

3.86

.739

.196

.120

.23

.62

.47

.50

.37

.78

4.26

7.37

4.31

.85

.23

.23

57 845 1.48 20.12

20,790

38,160

44,150

39,800

25,200

38,520

196,500

190,300

54,610

12,810

5,030

3,610

669,500

4,800

14,800

10,700

14,830

16,440

15,670

53,870

168,600

117,700

30,920

10,230

5,190

463,800

5,250

5,200

4,640

4,580

3,900

8,050

98,560

143,100

38,790

9,230

3,570

3,550

328,400

3,020

2,510

3,460

2,570

3,040

4,880

30,590

147,900

114,300

24,630

8,070

4,850

349,800

7,100

18,800

14,320

15,080

11,290

23,680

129,600

224,100

130,900

25,860

6,860

4,080

611,700
46 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Yearly discharge of Hoyle River at Eastport, Idaho

Year ending Sept. 30

Discharge In 

second-feet

Per 

square 

mile

Run-off

Inches Acre-feet

Calendar year

Discharge In 

second-feet

square

mile

Run-off

Inches Acre-feet

1930.

1931.

1932.

1933.

1954.

484

312

682

836

925

0.849

.547

1.20

1.47

1.62

11.53

7.44

16.28

19.90

22.02

350,000

226,000

495,000

605,000

669.500

488

311

722

919

824

0.856

.546

1.27

1.61

1.45

11.63

7.42

17.23

21.88

19.64

353,000

226,000

524,000

666,000

596,700

1935.

1936.

1937.

1938.

641

452

483

845

1.12

.793

.847

1.48

15.27

10.80

11.51

20.12

463,800

328,400

349,800

611,700

620

444

526

810

1.0 » 

.779 

.923

1.42

14.76

10.60

12.54

19.30

448,500

322,300

381,000

586,400

Moyie River at Snyder, Idaho

Location.- Staff gage, lat. 48°52', long. 116°10', in sec. 23, T- 64 N., R. 2 E., at 

Snyder ranger station, a quarter of a mile west of Snyder station on Spokane International Railway, 3^ miles downstream from Round Prairie, 8 miles downstream from 

international boundary, and 12 miles upstream from mouth.

Drainage area.- 717 square miles. ,

Records available.- February 1912 to September 1916, March 1919 to September 1923. March 

iyj.1 to February 1912 at site at railway bridge, 1 mile downstream.

Extremes.- Maximum discharge observed, 10,800 second-feet June 19, 1916 (gage height, 

11.0 feet); minimum observed, 56 second-feet Oct. 25 and 26, 1919 (gage height, 2.80 

feet) but may have been less during periods of ice effect in December 1919, January, 

February, and December 1922, and February 1923.

Remarks.- No diversions or regulation above station.

Monthly discharge of Moyie River at Snyder, Idaho

Month

Discharge in second-feet

Maximum Minimum square 

mile

Run-off

Acre-feet

1911

March 10-31.........

April...............

May.................

June................

July................

August..............

September...........

The period.......

1911-12 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1912-13 

October.............

November............

December............

January.. f ..........

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1,110

3,970

6,450

5,580

1,910

288

200

221

364

1,910

1,780

288

161

161

679

1,610

3,820

3,770

849

249

174

0-947 

2.25 

5.33 

5.26 

1.18 

.347 

.243

0.77

2.51

6.14

5.87

1.36

.40

.27

391

200

342

2,200

4,120

2,200

1,080

425

315

100

110

91

455

1,540

550

550

171

171

220

175

151

221

144

147

1,330

2,940

1,220

710

243

219

.307

.244

.211

.308

.201

.205

1.85

4.10

1.70

.990

.339

.305

.35

.27

.24

.36

.22

.24

2.06

4.73

1.90

1.14

.39

.34

645 .900 12.24

265

840

315

455

315

3,090

8,020

8,020

1,440

310

265

171

171

171

265

265

265

1,540

1,340

310

170

180

202

479

199

216

314

280

1,640

4,380

3,040

763

251

219

.282

.668

.278

.301

.438

.391

2.29

6.11

5.08

1.06

.350

.305

.33

.75

.32

.35

.46

.45

2.56

7.04

5.67

1.22

.40

.34

29,600

95,800

235,000

224,000

52,200

15,300

10,400

662,000

13,500

10,400

9,280

13,600

8,280

9,040

79,100

181,000

72,600

43,700

14,900

13,000

468,000

12,400

28,500

12,200

13,300

17,400

17,200

97,600

269,000

217,000

46,900

15,400

13,000

170 1,050 1.46 19.89 760,000
KOOTENAI RIVER BASIN 47

Monthly discharge of Moyie River at Snyder, Idaho Continued

Month

1913-14

July. .........................

The year ...................

1914-15

May. ..........................

July. .........................

1915-16

July..........................

September .....................

The year ...................

1919

April.................;.......

May...........................

July. .........................

1919-20

April.........................

The year ...................

Discharge in second-feet

Maximum

1,030 

274 

820 

3,820 

6,120 

4,760 

1,440 

288 

270

_

265 

1,160 

412 

187 

154 

595 

2,570 

2,320 

1,440 

665 

310 

170

2,570

224 

224 

217

1,790 

3,310 

6,740 

10,400

412 

206

10,400

509 

4,840 

7,230 

3,960 

930 

233 

117

_

86 

 211

100 

147 

308 

1,180 

4,120 

3,660 

1,650 

252 

310

4,120

Minimum

170

224 

665 

2,830 

1,540 

310 

125 

100

_

154 

386

140 

100 

125 

440 

1,540 

595 

334 

125 

120

_

140 

187 

154

224 

1,290 

1,680 

3,170 

440 

154 

115

115

191 

558 

2,250 

1,180 

251 

81 

81

_

56 

70

81 

141 

780 

1,550 

269 

122 

105

56

Mean

218

178 

423 

220 

487 

2,160 

4,460 

2,560 

743 

190 

145

.

213 

666 

221 

163 

128 

258 

1,460 

1,820 

901 

470 

195 

136

L 553

158 

206 

186 

159 

236 

927 

1,990 

3,750 

5,500 

2,270 

250 

142

1,310

244 

2,020 

4,260 

2,420 

516 

144 

93.2

_

78.4 

106 

102 

83.9 

89.5 

156 

478 

2,310 

2,650 

779 

164 

196

600

Per 

square 

mile

0-304

.248 

.590 

.307 

.679 

3.01 

6.22 

3.57 

1.04 

.265 

.202

.

.297 

.929 

.308 

.227 

.179 

.360 

2.04 

2.54 

1.26 

.656 

.272 

.190

.771

.220 

.287 

.259 

.222 

.329 

1.29 

2.78 

5.23 

7.67 

3.17 

.349 

.198

1.83

.340 

2.82 

5.94 

3.38 

.720 

.201 

.130

_

.109 

.148 

.142 

.117 

.125 

.218 

.667 

3.22 

3.70 

1.09 

.229 

.273

.837

Run- off

Inches

0.25

.22 

.68 

.32 

.78 

3.36 

7.17 

3.98 

1.20 

.31 

.23

.34 

1.04 

.36 

.26 

.19 

.42 

2.28 

2.93 

1.41 

.76 

.31 

.21

10.51

.25 

.32 

.30 

.26 

.35 

1.49 

3.10 

6.03 

8.56 

3.66 

.40 

.22

24.94

.39 

3.15 

6.85 

3.77 

.83 

.23 

.14

_

.13 

.17 

.17 

.'13 

.13 

.25 

.74 

3.71 

4.13 

1.26 

.26 

.30

11.38

Acre-feet

9,510

8,470 

26,000 

12,200 

29,900 

129,000 

274,000 

152,000 

45,700 

11,700 

8,630

13,100 

39,600 

13,600 

10,000 

7,110 

15,900 

86,900 

112,000 

53,600 

28,900 

12,000 

8.090

401,000

9,720 

12,300 

11,400 

9,780 

13,600 

57,000 

1J8,000 

231,000 

327,000 

140,000 

15,400 

8,450

954,000

15,000 

120,000 

262,000 

144,000 

31, 700 

8,850 

5,550

587.000

4,820 

6,310 

6,270 

5,160 

5,150 

9,590 

28,400 

142,000 

158,000 

47,900 

10,100 

ll r 7OO

435.000
48 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Moyie River at Snyder, Idaho Continued

Month

Discharge in second-feet

Maximum Minimum Mean square 

mile

Run-off

Inches Acre-feet

1920-21 

October.............

November..'..........

December............

January.............

February............

March...............

April...............

May...'..............

June................

July................

August..............

September...........

The year.........

1921-22 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1922-23 

October.............

November............

December............

January.............

February............

March...............

April'...............

Hay..................

June................

July................

August..............

September...........

The year.........

538

605

334

329

930

745

2,440

6,870

5,120

1,090

223

119

6,870

128

177

527

137

950

4,680

4,840

498

142

120

4,840

278

167

283

440

2,370

4,200

5,520

1,290

274

131

269

179

198

185

152

360

640

1,360

1,090

228

104

92

418

332

254

239

418

543

1,460

4,190

3,050

509

145

103

0.583

.463

.354

.333

.583

.757

2.04

5.84

4.25

.710

.202

.144

0.67

.52

.41

.38

.61

.87

2.28

6.73

4.74

.82

.23

.16

92 974 1.36 18.42

101

142

990

527

151

88

72

108

124

169

84.2

74.6

111

454

2,750

2,360

279

110

88.0

.151

.173

.236

.117

.104

.155

.633

3.84

3.29

.589

.153

.123

.17

.19

.27

.13

.11

.18

.71

4.43

3.67

.45

.18

.14

561 .782 10.63

72

103

90

109

468

1,580

1,380

283

131

91

119

129

120

170

105

149

1,210

3,260

2,950

656

186

106

.166

.180

.167

.237

.146

.208

1.69

4.55

4.11

.915

.259

.148

.19

.20

.19

.27

.15

.24

1.89

5.25

4.59

1.05

.30

.17

25,700

19,800

15,600

14,700

23,200

33,400

86,900

258,000

181,000

31,300

8,920

6,130

705,000

6,640

7,380

10,400

5,180

4,140

6,820

27,000

169,000

140,000

17,200

6,760

5,240

406,000

7,320

7,680

7,380

10,500

5,830

9,160

72,000

200,000

176,000

40,300

11,400

6,310

5,520 765 1.07 14.49 554,000

Yearly discharge of Moyle River at Snyder, Idaho

Year

Year ending Sept. 30

Discharge in 

second-feet

square

mile

Run-off

Inches

Calendar year

Discharge in 

second-feet

Mean square 

mile

Run-off

Inches Acre-fe§t

1912.

1913.

1914.

1915.

1916.

645

1,050

553

1.310

0.900

1.46

.771

1.83

12.24

19.89

10.51

24.94

468,000

760,000

401,000

954,000

673

1,040

508

0.939

1.45

.709

12.78

19.77

9.64

488,000

755,000

368,000

1920.

1921.

1922.

1923.

600

974

561

765

1.36

.782

1.07

11.38

18.42

10.63

14.49

4351000

705,000

406,000

554,000

660

923

558

T55T 

1.29 

.778

12.51

17.45

10.58

479,000

668,000

404,000
KOOTENAI RIVER BASIN 49

Moyie River at Eileen, Idaho

Location.- Water-stage recorder, lat. 48°46', long. 116°10', in NE£ sec- 35, T. 63 N., 

H- z E., an eighth of a mile downstream from Skin Creek, a quarter of a mile southeast o'f Eileen, and 4 miles upstream from mouth.

Drainage area.- 755 square miles.

Records available.- October 1925 to September 1938.

Extremes.- Maximum discharge, 8,780 seeond-feet Apr. 29, 1934; maximum gage height, 4.8 

reet Hay 17, June 10, 11, 1927, May 13, 17-19, 1928j minimum discharge, 40 secondfeet Nov. 27, 1936 (gage height, -0.25 foot).

Remarks.- No diversions or regulation above station.

Monthly discharge of Moyie River at Eileen, Idaho

Month

Discharge in second-feet

Maximum Minimum Mean square 

mile

Run-off

Acre-feet

1925-26 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year..........

1926-27 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year..........

1927-28 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year..........

1928-29 

October..............

November.............

December.............

January..............

February.............

Maroh................

April................

May..................

June.................

July.................

August...............

September............

The year..........

119

125

156

143

176

355

3,200

2,980

529

244

183

385

1,520

658

1,130

550

448

448

4,570

5,910

5,910

1,290

355

1,910

5,910

1,520

1,290

1,520

705

415

1,770

3,440

5,910

2,940

1,180

374

188

5,910

315

239

504

1,810

4,500

2,560

708

174

112

106

104

94

88

119

152

183

550

240

112

88

116

112

112

127

125

151

224

1,210

1,340

347

172

112

200

0.148 

.148 

.168 

.166 

.200 

.297 

1.60 

1.7V 

.460 

.228 

.148 

.265

0.17

.17

.19

.19

.21

.34

1.78

2.04

.51

.26

.17

.30

88 353 .468 6.33

287

355

330

220

236

480

1,770

1,400

355

220

305

766

455

552

330

288

286

1,470

3,350

3,530

710

274

902

.01

.603

.731

.437

.381

.379

.95

.44

.68

.940

.363

.19

1.16

.67

.84

.50

.40

.44

2.18

5.12

5.22

1.08

.42

1.33

1,080 19.36

705

705

385

296

269

790

2,060

735

385

192

127

1,150

904

839

486

355

678

1,350

4,580

1,410

763

"151 262

1.52

1.20

1.11

.644

.470

.898

1.79

6.07

.87

.01

.347

.200

1.75

1.34

1.28

.74

.51

1.04

2.00

7.00

2.09

1.16

.40

.22

127 1,080 19.53

136

262

1,300

759

177.

94

94

228

187

122

89.0

94.6

183

560

2,480

.1,850

363

128

100

.302

.248

.162

.118

.125

.242

.742

3.28

2.45

.481

.170

.132

.28

.19

.14

.13

.28

.83

3.78

2.73

.55

.20

.15

6,890

6,660

7,810

7,690

8,390

13,800

72,000

82,400

20,600

10,600

6,890

11,900

256,000

47,100

27,100

33,900

20,300

16,000

17,600

87,500

206,000

210,000

43,700

16,800

53,700

780,000

70,700

53,800

51,600

29,900

20,400

41,700

80,300

282,000

83,900

46,900

16,100

8,980

786,000

14,000

11,100

7,500

5,470

5,250

11,300

33,300

152,000

110,000

22,300

7,870

5,950

4,500 534 .707 9.61 386,000
50 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Moyie River at Eileen, Idaho Continued

Month

Discharge In second-feet

Maximum Minimum

Per 

square 

mile

Inches

1929-30 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1930-31 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1931-32 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1932-33 

October............

November...........

December...........

January............

February...........

March..............

April...............

May.................

June...............

July...............

August.............

September...........

The year.........

1933-34 

October............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

127

98

155

124

250

700

3,540

3,540

3,540

735

202

114

70

63

60

82

149

636

1,720

779

213

104

95

96.1

89.0

93.2

83.2

126

255

1,880

2,160

1,570

400

145

104

0.127

.118

.123

.110

.167

.338

2.49

2.86

2.08

.530

.192

.138

0-15

.13

.14

.13

.17

..39

2.78

3.30

2.32

.61

.22

.15

3,540 60 584 .774 10.49

146

159

120

183

238

504

1,650

3,410

1,330

414

131

100

104

117

133

340

1,380

426

131

77

72

120

128

102

113

147

273

719

2,240

674

246

97.8

86.7

.159

.170

.135

.150

.195

.362

.952

2.97

.89

.326

.130

.115

3,410 72 415 .550

112

183

1,490

814

2,620

6,610

4,830

838

182

124

303

917

2,260

908

185

120

101

87.7

128

121

138

287

474

1,860

4,360

2,570

429

139

108

.116

.170

.160

.183

.380

.628

2.46

5.77

3.40

.568

.184

.143

.13

.19

.18

.21

.41

.72

2.74

6.65

3.79

.65

.21

.16

6,610 77 892 1.18 16.04

210

812

1,230

359

259

624

5,260

6,230

6,020

1,720

316

239

87

170

280

259

183

639

2,410

1,840

316

142

142

135

388

506

301

202

275

1,710

3,910

4,240

803

206

175

.179

.514

.670

.399

.268

.364

2.26

5.18

5.62

1.06

.273

.232

.21

.57

.77

.46

.28

.42

2.52

5.97

6.27

1.22

.31

.26

6,230 87 1,070 1.42 19.26

600

290

790

440

873

630

380

970

260

461

139

104

186

624

485

707

498

541

1,540

2,530

491

137

91

402

821

991

942

708

901

4,281

3,933

1,081

264

109

.532

1.09

1.31

1.25

.938

1.19

5.67

5.21

1.43

.350

.144

.123

.61

1.22

1.51

1.44

.98

1.37

6.33

6.01

1.60

.40

.17

.14

5,910

5,300

5,730

5,120

7,000

15,700

112,000

133,000

93,400

24,600

8,920

6-190

425.000

7,380

7,620

6,270

6,950

8,160

16,800

42,800

138,000

40,100

15,100

6,010

5,160

300,000

5,390

7,620

7,440

8,480

16,500

29,100

111,000

268,000

153,000

26,400

8,550

6,430

648,000

8,300

23,100

31,100

18,500

11,200

16,900

102,000

240,000

252,000

49,400

12,700

10,400

776,000

24,730

48,860

60,930

57,930

39,340

55,380

254,700

241,800

64,300

16,230

6,720

5,540

1,211 1.60 21.78 876,500
KOOTENAI RIVER BASIN 51

Monthly discharge of Moyie River at Eileen, Idaho Continued

Month

Discharge In second-feet

Maximum Minimum Mean square 

mile

Inches Acre-feet

1934-35

October...........

November,..........

December'..........

January............

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1935-36 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August......^.....

September.........

The year.......

1936-37 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1937-38 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

183

562

311

800

528

535

2,820

5,890

4,440

1,060

322

150

5,890

181

187

124

131

288

4,610

4,010

1,570

326

10i

131

4,610

81

211

249

1,530

3,760

3,060

1,130

312

160

3,760

253

758

839

660

391

1,150

6,770

6,720

4,830

1,020

215

132

130

134

120

307

259

335

2,220

986

331

150

111

109

347

234

323

403

385

1,264

3,574

2,407

641

214

127

0.144

.460

.310

.428

.534

.510

1.67

4.73

3.19

.849

.283

.168

0.17

.51

.36

.49

.56

.59

1.86

5.45

3.56

.98

.33

.19

88 837 15.05

103

100

94

85

130

152

1,490

340

110

81

81

124

132

114

114

90.1

199

2,200

2,865

813

200

91.2

94.7

.164

.175

.151

.151

.119

.264

2.91

3.79

1.08

.265

.121

.125

.19

.20

.17

.17

.13

.30

3.25

4.37

1.20

.31

.14

.14

81 587 .777 10.57

264

1,420

1,240

231

129

109

83.3

69.4

91.8

69.7

85.7

130

739

2,910

2,238

502

181

124

.110

.092

.122

.092

.114

.172

.979

.85

.96

.665

.240

.164

.13

.10

.14

.11

.12

.20

1.09

4.44

3.30

.77

.28

.18

604 .800 10.86

131

221

202

250

235

283

676

2,670

1,110

223

121

101

158

440

354

406

284

615

2,809

4,341

2,524

517

160

113

.2(39 

.583 

.469 

.538 

.376 

.815 

3.72 

5.75 

3.34 

.685 

.212 

.150

.24

.65

.54

.62

.39

.94

4.15

6.63

3.73

.79

.24

.17

6,680

20,670-

14,370

19,830

22,370

23,660

75,220

219,700

143,200

39,420

13,160

7,550

605,800

7,610

7,840

7,000

7,000

5,180

12,230

130,900

176,200

48,390

12,270

5,610

5,640

425,900

5,120

4,130

5,650

4,280

4,760

8,000

44,000

178,900

133,200

30,800

11,100

7,410

437,400

9,730

26,150

21,750

24,970

15,780

37,790

167,100

266,900

150,200

31,780

9,830

6,750

6,770 101 1,062 1.41 19.09 768,700
52 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Yearly discharge of Moyle River at Bileen, Idaho

Year

Year ending Sept. 30

Discharge in 

second-feet

Mean square 

mile

Run-off

Inches

Calendar year

Discharge in 

second-feet

Mean

Per 

square 

mile

Run-off

Inches Acre-feet

1926.

1927.

1928.

1929.

1930.

353

1,080

1,080

534

584

0.468

1.43

1.43

.707

.774

6.33

19.36

19.53

9.61

10.49

256,000

780,000

786,000

386,000

423.000

473

1,170

885

513

590

0.626

1.55

1.17

.679

.781

8.47

21.06

15.98

9.21

10.60

342,000

848,000

643,000

370,000

427,000

1931.

1932.

1933.

1934.

1935.

415

892

1,070

1,211

837

.550

1.18

1.42

1.60

1.11

7-46 

16.04 

19.26 

21.78 

15.05

300,000

648,000

776,000

876,500

605.800

414

950

1,170

1,083

810

.548

1.26

1.55

1.43

1.07

7.45

17.09

21.05

19.48

14.57

300,000

690,000

848,000

783,700

586.600

418,300

480,100

734,300

1936.

1937.

1938.

Highest. 

Average. 

Lowest..

587

604

1,062

.777

.800

1.41

10.57

10.86

19.09

425,900

437,400

768,700

576

663

1,014

.763

.878

1.34

10.38

11.92

18.24

1,211

793

353

1.60

1.05

.468

21.78

14.26

6.33

876,500

574,600

256,000

1,170

793

414

1.55

1.05

.548

21.06

14.27

7.43

848,000

574,700

300,000

Cow Creek near Bonners Perry, Idaho

Location.- Staff gage, lat. 48°41', long. 116°15', in SWj sec. 31, T. 62 N-, R. 2 E., 

at footbridge on Goldbeck Ranch, 3 miles southeast of Bonners Perry.

Records available.- May 1928 to September 1934.

Extremes.- naxlmum discharge observed, 60 second-feet June 9, 1933 (gage height, 5.48 

feetj; minimum observed, 0.4 second-foot Sept. 8, 9, 14-17, 28-30, 1932.

Remarks.- Some water diverted above station during summer for irrigation.

__________Monthly discharge of Cow Creek near Bonners Ferry, Idaho

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1928 

May 16-31...................................... 56 27

June........................................... 24 7.5

July........................................... 8.9 3.6

August...............................;......... 3.8 2.5

September...................................... 2.7 2.3

The period...............

1928-29 

October 1-6...................................'. 3.3 2.3

March 17-31.................................... 3.7

April.......................................... 4.6 1.6

May............................................ 22 4.3

June........................................... 12 4.3

July........................................... 4.7 1.2

August......................................... 1.4 1.0

1930 

March 17-31.................................... 7.4 3 . 2

April.......................................... 15 3.9

May............................................ 13 7.4

June............................................ 10 1.5

July........................................... 1.5

August....

September...................................... i.o .7

The period...............

1930-31

October 1-4.................................... .90

March 10-31. ................................... 5.0 1.4

April.......................................... 7.2 1.6

May............................................ is 5.6

June........................................... 7.4

July........................................... 1.8 .6

August......................................... .7 .5

September...................................... 1.3 .5

44.8

12.7

5.95

2.87

2.34

2.90

2.13

2.35

12.0

7.49

1.92

1.13

4.11

8.10

9.41

6.01

1.15

.81

.80

.90

2.88

3.76

12.6

3.43

1.10

.53

.72

1,420

756

366

176

139

2,860

35

63

140

738

446

118

69

122

482

579

358

71

50

48

1,710

7.1

126

224

775

204

68

33

43
KOOTENAI RIVER BASIN 53

Monthly discharge of Cow Creek near Bonners Perry, Idaho Continued

Month

1932

September ......................................

» , 1933

May ............................................

July. ..........................................

1934

May. ...........................................

July. ..........................................

Discharge in second-feet

Maximum

45 

8.0 

14 

48 

25 

5.1 

1.8 

.8

-

8.8 

32 

50 

60 

13 

3.2 

2.0

_

24 

54 

37 

14 

2.9 

1.3 

1.5

-

Minimum

12 

2.1 

4.3 

11 

5.7 

1.8 

.5 

 4

-

6.2 

14 

15 

3.0 

1.3 

1.1

_

7.1 

17 

16 

2.9 

1.1 

.6 

.6

-

Mean

30.5 

3.48 

8.71 

28.2 

13.8 

3.36 

1.16 

..50

-

4.55 

10.5 

24.2 

37.3 

7.25 

2.05 

1.47

_

8.68 

29.6 

27.6 

6.98 

1.88 

.94 

.86

-

Run- off 

in 

acre-feet

242 

214 

518 

1,730 

821 

207 

71 

30

3,830

280 

625 

1,490 

2,220 

446 

126 

87

5,270

534 

1,760 

1,700 

416 

116 

57 

51

4,630

Deep Creek at Moravia, Idaho

Location.- Staff Gage, lat. 48°38«, long. 116°24', in sec. 18, T. 61 N., R. IE., at concrete highway bridge 1 mile below Ruby Creek and 1 mile southwest of Moravia.

Drainage area.- 133 square miles.

Records available.- May 1928 to September 1938.

Extremes.- Maximum discharge observed, 1,300 second-feet Dec. 22, 1933 (gage height, 4.20 

feet); minimum discharge, 7 second-feet Aug. 15, 24, 25, 1931; minimum gage height, 

0.18 foot Sept. 3, 5, 1938.

Remarks.- No regulation or diversion of any size above station.

Monthly discharge of Deep Creek at Moravia, Idaho

Month

1928

1929 

March 17-31. ..................

May. ..........................

1930

April.........................

May...........................

Discharge in second-feet

Maximum

243 

93 

23 

18

-

205 

276 

390 

254 

65 

14

-

232 

403 

242 

204 

65 

11 

16

-

Minimum

256 

77 

23 

9 

9

-

60 

48 

188 

65 

16 

8

-

70 

194 

122 

60 

16 

8 

8

-

Mean

511 

138 

57.0 

14.0 

12.5

-

89.1 

113 

269 

139 

30.2 

9.7

-

117 

277 

163 

103 

33.5 

9.5 

11.3

-

Per 

square 

mile

3.84 

1.04 

.429 

.105 

.094

-

.670 

.850 

2.02 

1.05 

.227 

.073

-

.880 

2.08 

1.23 

.774 

.252 

.071 

.085

-

Run-off

Inches

3.43 

1.16 

.49 

.12 

.10

-

.37 

.95 

2.33 

1.17 

.26 

.08

-

.43 

2.32 

1.42 

.86 

.29 

.08 

.09

-

Acre-feet

24,300 

8,210 

3,500 

861 

744

37,600

2,650 

6,720 

16,500 

8,270 

1,860 

596

36,600

3,020 

16,500 

10,000 

6,130 

2,060 

584 

672

39,000
54 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Deep Creek at Moravia, Idaho Continued

MonthDischarge in second-feet

Maximum Minimum square 

mile

Run-off

Inches Acre-feet

1930-31 

Petober 1-11.......

March 10-31........

April..............

May................

June...............

July...............

August.............

September..........

1932

February 27-29...-.. 

March..............

April..............

May................

June...............

July...............

August.............

September..........

The period......

1932-33 

October............

November...........

December...........

January............

February...........

March..............

April..............

May....... .........

June...............

July...............

August.............

September..........

The year.......

1933-34 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1934-35 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year.........

34

210

360

303

112

32

10

14

819

402

742

819

402

68

16

14

45

263

421

179

92

279

975

666

704

205

26

975

119

160

1,300

594

301

532

980

433

145

33

13

15

1,300

138

258

126

400

143

316

638

825

506

136

24

20

11

64

138

104

32

10

7

10

18.1

130

210

222

57.9

19.0

8.6

12.3

0.136

.977

1.58

1.67

.435

.143

.065

.092

0.06

.80

1.76

1.92

.49

.16

.07

.10

477

115

294

329

68

16

11

10

667

209

528

582

246

36.5

12.8

11.6

5.02

1.57

3.97

4.38

1.85

.274

.096

.087

.56

1.81

4.43

5.05

2.06

.32

.11

.10

14

26

83

66

46

205

477

205

13

13

21.9

92.3

144

98.9

59.5

114

449

565

459

85.9

17.7

18.3

.165

.694

1.08

.744

.447

.857

3.38

4.25

3.45

.646

.133

.138

.19

.77

1.24

.86

.47

.99

3.77

4.90

3.85

.74

.15

.15

177 1.33 18.08

17

58

49

232

130

147

433

162

37

12

9

9

36.0

76.0

341

367

209

242

584

297

79.9

19.3

10.5

11.9

.271

.571

2.56

2.76

1.57

1.82

4.39

2.23

.601

.145

.079

.089

.31

.64

2.95

3.18

1.63

2.10

4.90

2.57

.67

.17

.09

.10

189 1.42 19.31

14

31

68

50

96

88

143

220

112

26

14

14

32.6

119

88.5

115

114

161

327

562

263

63.9

17.9

15.4

.245

.895

.665

.865

.857

1.21

2.46

4.23

1.98

.480

.135

.116

.28

1.00

.77

1.00

.89

1.39

2.74

4.88

2.21

.55

.16

.13

395

5,670

12,500

13,600

3,450

1,170

529

732

3,970

12,900

31,400

35,800

14,600

2,240

787

690

102,000

1,350

5,490

8,850

6,080

3,300

7,010

26,700

34,700

27,300

5,280

1,090

1,090

128,000

2,210

4,520

20,940

22,590

11,610

14,870

34,720

18,S30

4,750

1,190

647

706

137,000

2,000

7,070

5,440

7,100

6,340

9,890

19,470

34,580

15,670

3,930

1,100

914

825 14 157 1.18 16.00 113,500
KOOTENAI RIVER BASIN 55

Monthly discharge of Deep Creek at Moravia, Idaho Continued

Month

Discharge in second-feet

Maximum Minimum

Per 

square 

mile

Inches Acre-feet

1935-36

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1936-37 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1937-38 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

41

35

41

44

115

920

630

162

38

13

78

920

18

21

132

142

830

730

460

113

38

120

830

44

425

690

478

150

730

1,260

930

460

109

19

20

15

24

20

27

59

60

151

40

12

10

10

21.7

29.8

30.2

33.0

32.9

78.0

442

364

92.5

23.2

11.0

19.8

0.163

.224

.227

.248

.247

.586

3.32

2.74

.695

.174

.083

.149

0.19

.25

.26

.29

.27

.68

3.70

3.16

.78

.20

.10

.17

10 98.0 .737 10.05

25

132

265

120

24

13

14

17.5

17.6

38.9

18.4

23.8

55.5

348

419

219

50.8

19.2

22.5

.132

.132

.292

.138

.179

.417

2.62

3.15

1.65

.382

.144

.169

.15

.15

.34

.16

.19

.48

2.92

3.63

1.84

.44

.17

.19

13 104 .782 10.66

21

29

111

100

90

111

252

442

116

20

12

11

28.0

140

173

198

111

272

617

642

265

51.1

16.3

15.0

.211

1.05

1.30

1.49

.835

2.05

4.64

4.83

1.99

.384

.123

.113

.24

1.17

1.50

1.72

.87

2.36

5.18

5.57

2.22

.44

.14

.13

1,330

1,780

1,860

2,030

1,890

4,800

26,290

22,410

5,500

1,430

678

1,180

71,180

1,080

1,050-

2,390

1,130

1,320

3,410

20,720

25,740

13,060

3,120

1,180

1,340

75,540

1,720

8,310

10,650

12,190

6,150

16,750

36,710

39,450

15,740

3,140

1,000

893

Iy260 11 211 1.59 21.54 152,700

Yearly discharge of Deep Creek at Moravia, Idaho

Year

Year ending Sept. 30

Discharge In 

second-feet

Mean

Per 

square 

mile

Inches Acre-feet

Calendar year

Discharge in 

second-feet

square 

mile

Run-off

Acre-feet

1933.

1934.

1935.

1936.

1937.

1938.

177

189

157

98.0

104

211

1.33

1.42

1.18

.737

.782

1.59

18.08

19.31

16.00

10.05

10.66

21.54

128,000

137,000

113,500

71,180

75,540

152.700

194

171

144

97.4

127

190

1.46

1.29

1.08

.732

.955

1.43

19.78

17.46

14.65

9.99

12.93

19.45

140,000

123,800

104,000

70,730

91,700

137,800
56 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Snow Creek near Moravia, Idaho

location.- Staff gage, lat. 48°40', long. 116°24', in SWj sec. 1, T. 61 N., R. 1 W., 

2 miles northwest of Moravia and 5 miles southwest of Bonners Perry.

Drainage area.- 19.5 square miles.

Records available.- May 1928 to September 1934.

Extremes.- Maximum discharge observed, 572 second-feet June 14, 15, 1933 (gage height, 

2.80 feet); minimum discharge, 1 second-foot Aug. 16 to Sept. 10, Sept. 16-21, 1934; 

minimum gage height, 0.30 foot Sept. 16 and 22, 1932.

Remarks.- No diversions above station.

Monthly discharge of Snow Creek near Moravia, Idaho

Discharge in second-feet

Maximum Minimum Mean square 

mile

Run-off

Acre-feet

1928

May 8-31............

June................

July................

August..............

September...........

The period.......

1929 

March 17-31........,

April...............

May.................

June................

July................

August..............

September...........

The period.......

1930 

March 20-31.... .....

April...............

May.................

June................

July................

August..............

September...........

The period.......

1931 

March 11-31.........

April............./.

May.................

June................

July................

August..............

September.......'....

The period.......

1932 

March 6-31..........

April...............

May.................

June................

July................

Augus t..............

September...........

The period.......

1932-33 

October 1-8.........

March...............

April...............

May............. ....

June................

July................

August..............

September...........

352

107

45

10

4

45

78

269

122

20

5

4

36

202

152

120

23

5

4

30

75

275

75

12

4

7

64

162

352

258

51

7

5

3

35

186

334

572

142

13

8

121

43

7

4

2

237

68.3

22.2

4.8

2.6

12.2

3.50

1.14

.246

.133

10.89

3.90

1.31

.28

.15

14.4

27.2

116

67.2

10.0

3.4

2.7

.738

1.39

5.95

3.45

.513

.174

.138

.41

1.55

6.86

3.85

.59

.20

.15

22.5

99.1

93.6

54.2

12,1

4.2

3.2

1.15

5.08

4.80

2.78

.621

,215

.164

.51

5.67

5.53

3.10

.72

.25

.18

19.1

33.2

116

28.3

6.5

2.4

3.1

.979

1.70

5.95

1.45

.333

.123

.159

.76

1.90

6.86

1.62

.38

.14

.18

25

56

113

56

7

4

3

42.5

105

217

154

20.4

4.9

3.4

2.18

5.38

11.1

7.90

1.05

.251

.174

2.11

6.00

12.8

8.81

1.21

.29

.19

31

95

139

14

4

3

3.0

15.8

76.0

154

285

59.7

7.8

5.9

.154

.810

3.90

7.90

14.6

3.06

.400

.303

.05

.93

4.35

9.11

16.29

3.53

.46

.34

11,300

4,060

1,360

295

155

17,200

428

1,620

7,130

4,000

615

209

161

14,200

536

5,900

5,760

3,230

744

258

190

16,600

796

1,980

7,130

1,680

400

148

184

12,300

2,190

6,250

13,300

9,160

1,250

301

202

32,700

48

972.

4,520

9,470

17,000

3,670

480

351
KOOTENAI RIVER BASIN 57

Monthly discharge of Snow Creek near Moravia, Idaho Continued

Month

Discharge in second-feet

Minimum Mean square 

mile

Run-off

Acre-feet

1933-34

October 1-7. 

March.......

April.......

May.........

June........

July........

August......

September...

60

377

236

92

16

3

4

70

120

20

3

1

1

7.9

37.3

193

186

55.6

8.3

1.6

1.7

0.405 

1.91 

9.90 

S.54 

2.85 

.426 

.082 

.087

0.11

2.20

11.05

11.00

3.18

.19

.09

.10

109

2,290

11,460

11,430

3,310

508

101

101

Caribou Creek near Moravia, Idaho

Location.- Staff gage, lat. 48040", long. 116°24', in NEj sec. 12, T. 61 N., R. 1 W., 600 

feet upstream from highway bridge and lj miles northwest of Moravia. During 1928, 1930, 

and 1931 a staff gage In NEj sec. 11, T. 61 N., R. 1 W., 1 mile upstream was used.

Drainage area.- 14 square miles.

Records available.- May 1928 to September 1934.

Extremes.- Maximum discharge, 376 second-feet June 15, 1933 (gage height, 5.58 feet); 

practically no flow Aug. 22-26, 1934.

Remarks.- Several small diversions between upper and lower gage sites for Irrigation and 

railroad water supply.

Monthly discharge of Caribou Creek near Moravia, Idaho

Month

Discharge in second-feet

Maximu»n Minimum Mean

Run-off

In 

acre-feet

1928 

May 9-31..................:.................... 234

June........................................... 85

July........................................... 26

Augus t........................................

September...................................... 4

The period.................................

1929 

March 17-31.................................... 49

April.......................................... 91

May............................................ 143

June........................................... 66

July........................................... 14

August........................................

September.....................................

The period.................................

1930 

March 22-31.................................... 38

April.......................................... 113

May............................................ 85

June........................................... 83

July........................................... 17

August........................................

September....:................................. 3

The period.................................

1931

March 10-31.................................... 34

April.......................................... 65

May............................................ 175

June........................................... 56

July........................................... 10

August......................................... 3

September...................................... 5

The period.................................

20

164

45.8

13.5

4.5

3.3

6

12

50

17

1

16.9

31.0

77.1

44.5

4.8

1.0

1.9

14

41

47

17

4

2

25.0

74.5

61.3

34.8

8.7

2.9

2.1

9

18

51

10

3

1

1

19.2

36.9

81.7

22.6

5.1

1.6

2.0

7,480

2,730

830

277

196

11,500

503 

1,840 

4,-740 

2,650

295 

61

113

10,200

496

4,430

3,770

2,070

535

178

125

11,600

838

2,200

5,020

1,340

314

98

119

9,930
58 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Caribou Creek near Moravia, Idaho Continued

Month

1932

July. ..........................................

1932-33

1934

Discharge in second-feet

Maximum

142 

105 

147 

188 

156 

50 

2

-

.6 

24 

165 

172 

376 

112 

9 

5

49 

246 

142 

62 

12 

1 

2

-

Minimum

125 

21 

39 

82 

54 

2

-

.3 

7 

20 

64 

105 

10 

1 

1

60 

81 

11 

.7 

0 

.3

-

Mean

134 

41.5 

91.2 

136 

106 

15.9 

1.3 

.4

-

.41 

13.3 

61.7 

110 

164 

40.0 

3.8 

2.8

29.2 

128 

113 

38.2 

4.59 

.34 

.66

-

Run- off 

in 

acre-feet

532 

2,550 

5,430 

8,360 

6,310 

978 

80 

24

24,300

6.5 

818 

3,670 

6,760 

9,760 

2,460 

234 

167

1,800 

7,600 

6,980 

2,280 

282 

21 

39

19,000

Myrtle Creek near Bonners Ferry, Idaho

Location.- Staff gage, lat. 48°42', long. 116°25', in sec. 23, T. 62 N., R. 1 W., 80 feet 

upstream from power plant of Bonners Perry Light & Water Co. and 5j miles west of 

Bonners Perry.

Drainage area.- 37 square miles.

Records available.- May 1928 to September 1934.

Extremes.- Maximum discharge observed, 1,260 second-feet June 15, 1933 (gage height, 4.90 

feet); minimum observed, 0.4 second-foot Sept. 6-22, 30, 1929; minimum.gage height, 

0.50 foot Sept. 8-22, 30, 1929.

Remarks.- Water supply for village of Bonners Perry (probably not exceeding 1 second-foot) 

diverted above station. The Bonners Perry municipal power plant diverted 461 acrefeet around gage during May and June 1928 and 281 acre-feet during August and September 

1929.

Monthly discharge of Myrtle Creek near Bonners Perry, Idaho

Month

1928

1929

May. ...... ....................

Discharge in second-feet

Maximum

780 

283 

98 

20 

10

-

70 

144 

548 

373 

51 

11 

5.4

-

Minimum

249 

90

18 

11 

8

-

6.7 

16 

86 

58 

11 

4.4 

.4

-

Mean

*

551 

152 

46.7 

13.7 

8.7

-

20.4 

40.6 

234 

171 

24.8 

7.32 

1.09

Per 

square 

mile

-

-

0.551 

1.10 

6.32 

4.62 

.670

-

Run- off

Inches

-

-

0.31 

1.23 

7.29 

5.16 

.772

-

Acre-feet

26, 200 

9,040 

2,870 

842 

518

39,500

607 

2,420 

14,400 

10,200 

1,520 

450 

64.9

29,700
KOOTENAI RIVER BASIN 59

Monthly discharge of Myrtle Creek near Bonners Perry, Idaho Continued

Month

Discharge in second-feet

Maximum Mean square 

mile

Run-off

Inches Acre-feet

1930

April.............

May...............

June..............

July..............

August............

September.........

The period.....

1931 

March 11-31........

April.......... ....

May................

June...............

July...............

August.............

September..........

The period......

1932 

February 27-29.....

March..............

April..............

May................

June...............

July...............

August.............

September..........

The period......

1932-33 

October 1-8........

March..............

April..............

May................

June...............

July...............

August.............

September..........

1934 

March..............

April..............

May................

June...............

July...............

August.............

September..........

The period......

373

353

220

48

18

12

51

135

44

8.4

3.6

3.6

175

190

109

22.1

7.35

6.45

4.73

5.14

2.95

.597

.199

.174

5.28

5.93

.23 

.19

58

373

566

196

32

6

10

16

29

160

38

6

3

3

445

140

172

570

525

117

15

197

39

76

140

119

15

6

4

39

270

505

1,080

352

41

35

14

30

130

370

42

14

13

121

820

490

214

37

8

10

35

107

266

39

8

4

4

31.1

68.6

288

77.2

15.0

4.4

5.0

,.841

1.85

7.78

2.09

.405

,.119

.135

.66

2.06

8.97

2.33

.47

.14

.15

304

67.3

128

344

326

48.7

8.9

5.3

8.22

1.82

3.46

9.30

8.81

1.32

.241

.143

.92

2.10

3.86

10.7

9.83

1.52

.28

.16

5.0 

21.6 

86.7

218

567

150 

25*0 

22.2

.135

.584

2.34

5.89

.5.3

4.05

.676

.600

.04

.67

2.61

6.79

17.07

4.67

.78

.67

56.1

300

368

119

16.3

6.1

6.1

1.52

8.11

9.95

3.22

.441

.165

.165

1.75

9.05

11.47

3.59

.51

.19

.13

10,400

11,700

6,490

1,360

452

384

50.800

1,300

4,080

17,700

4,590

922

271

298

29,200

1,810

4,140

7,620

21,200

19,400

2,990

547

315

58,000

79

1,330

5,160

13,400

33,700

9,220

1,540

1,320

3,450

17,830

22,620

7,090

1,000

375

363

52,730

Ball Creek near Bonners Perry, Idaho

Location.- Staff gage, lat. 48°48', long. 116°25', in SWj.seo. 24, T. 63 N., R, 1 W., 

three-quarters of a mile upstream from mouth and 8.2 miles northwest of Bonners 

Ferry.

Drainage area.- 27 square miles.

Records available.- May 1928 to September 1934.

Extremes.- Maximum discharge observed, 644 second-feet June 15, 1933 (gage height, 4.60 

feet); minimum observed, 2 second-feet Sept. 10, 1934 (gage height, 1.82 feet).

Remarks.- Minor diversions above station for irrigation.

Monthly discharge of Ball Creek near Bonners Ferry, Idaho _________

Month

Discharge in second-feet

Maximum Minimum

Per 

square 

mile

Run-off

Acre-feet

1928

May 10-31. 

June......

July......

August....

September.

388

56

10

6

164

51

306

88.0

25.5

7.2

4.8

11.3

3.26

.944

.267

.178

9.25

3,64

1.09

.31

.20

13,400

5,240

1,570

443

286

The period. 20,900
60 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Ball Creek near Bonners Perry, Idaho Continued

Month

Discharge in second-feet

Maximum Minimum

Per 

square 

mile

Inches

1928-29

October 1-2.........

March 17-31.........

April...............

May.................

June................

July................

August..............

1930 

March 23-31.........

April................

May.................

June................

July................

Augus t..............

September...........

The period.......

1931 

March 13-31.........

April...............

May.................

June................

July................

August..............

September...........

The period.......

1932 

March 7-31..........

April...............

May.................

June................

July................

August..............

September...........

The period.......

1932-33 

October 1-21........

March 21-31.........

April...............

May.................

June................

July................

August..............

September...........

M V, 1934 March...............

April...............

May.................

June................

July................

August..............

September...........

The period.......

15

14

68

361

210

36

6

19

239

177

147

29

6

6

15

59

314

145

23

6

13

39

95

344

329

110

10

6

15

149

358

594

217

19

14

71

617

372

166

30

7

7

9.5

7.

14.9

142

114

16.0

5.0

0.35 

.270 

.552 

5.26 

4.22 

.59; 

.185

0.03 

.15 

.6!

6.06

4.71

.68

.21

11.8

102

136

72.3

14.0

5.2

4,1

.43 

3.78 

5.04 

2.68 

.519 

.193 

.15:

.15

4.22

5.81

2.99

.60

.22

.17

9.2

19.8

173

56.4

12.7

4.8

5.4

.341 

.73; 

6.41 

2.09 

.470 

.178 

.200

.24

.82

7.39

2.33

.54

.21

.22

21

40

80

123

11

6

4

27.6

71.0

217

218

37.2

7.1

4.6

1.02

2.63

8.04

8.07

1.38

.263

.170

.95

2.93

9 27

9ioo

1.59

.30

.19

10

13

80

230

21

7

6

11.9

44.0

156

371

102

11.6

8.5

.256

.441

1.63

5.78

13.7

3.78

.430

.315

.20

.18

1.82

6.66

15.29

4.36

.50

.35

62

196

32

7

3

2

29.4

213

274

95.6

15.7

5.1

4.2

1.09

7.89

10.1

3.54

.581

.189

.156

1.26

8.80

11.64

3.95

.67

.22

.17

37

217

887

8,730

6,780

984

307

211

6,070

8,360

4,300

861

320

244

20,400

347

1,180

10,600

3,360

781

295

321

16,900

1,370

4,260

13,300

13,000

2,290

437

274

34,900

287

260

2,620

9,590

22,100

6,270

713

506

1,810

12,680

16,880

5,690

966

311

252

38,590

Trcut Creek near Copeland, Idaho

Location.- Staff gage, lat. 48°50', long. 116°26>, in NE^ sec. 10, T. 63 N., R. 1 W., 2

miles upstream from mouth and 5^ miles southwest of Copeland. 

Drainage area.- 20 square miles. 

Records available.- May 1928 to September 1934.

Extremes.- Maximum discharge observed, 533 second-feet June 16, 1933; minimum discharge, 

 2 second-feet on several days in 1928, 1930, 1931, and 1934. 

Remarks.- Ho diversions or regulation above station.
KOOTENAI RIVER BASIN 61

Monthly discharge of Trout Creek near Copeland, Idaho

Month

Discharge In second-feet

Minimum

Per

square

mile

Inches Acre feet

Run-off

1928 

Hay 28-31............

June.................

July.................

August..............

September...........

The period .......

1929 

April 27-30.........

May.................

June ................

July................

August 1-3..........

The period.......

1930 

April.,.,..........,

May.................

June................

July................

August..............

September...........

The period.......

1931 

March 30-31.........

April,...,,.........

May.................

June................

July................

August..............

September...........

The period.......

1932 

March 7-31.....,,,..

April...............

May.................

June................

July................

August..............

September...........

The period.......

1933 

March 18-31..........

April................

May..................

June.................

July.................

Vugust...............

September............

The period........

1933-34 

October 1-24.........

March................

April ...............

May..................

June.................

July.................

LUgUSt ..............

September............

208

124

36

6

4

270

131

26

157

120

81

19

4

4

60

216

75

18

4

5

23

89

280

240

46

7

4

10

120

266

533

131

18

10

42

371

211

137

28

6

3

131

34

7

4

2

178

58.6

19.5

4.5

2.6

8.90

2.93

,975

,225

.130

1.32

3.27

1.12

.26

.14

56.6

118

70.0

13.2

5.Q

2.84

5.90

3.50

.660

,250

.42

6.80

3.90

.76

.03

74.3

82.6

44.2

8.3

2.9

2.6

3.72

4.13

2.21

.415

.145

.130

4.15

4.76

2.47

.48

.17

.14

6.0

18.0

123

34.9

9.4

2.8

3.0

.300

.900

6.15

1.74

.470

.140

.150

.02

1.00

7.09

1.94

.54

.16

.17

17,6

55.9

184

147

21.1

4.8

3.3

.88C

2.80

9.20

7.35

1.06

,24C

.16E

.82

3.12

10.6

8.20

1.22

.23

.18

6

10

47

133

18

6

6

7.8

31.0

105

258

54.1

9.7

6.9

1.55

5.25

12.9

2.70

.485

.345

.20

1.73

6.05

14.39

3.11

,56

.38

40

129

30

6

2

2

7.5

23.6

138

166

66.6

15.0

3.4

2.4

.375

1.18

6.90

8.30

3.33

.750

.170

.120

.34

1.36

7,70

9.57

3.72

.86

.20

.13

1,410

3,490

1,200

277

155

6,530

451

7,260

4,170

812

30

12,700

4,420

5,080

2,630

510

178

155

13,000

24

1,070

7,560

2,080

578

172

179

11,700

873

3,330

11,300

8,750

1,300

295

1S6

26,000

217

1,840

6,460

15,400

3,330

596

411

28,300

359

1,450

8,240

10,220

3,960

920

212

143

527283 O - 43 - 5
62 SURFACE WATEBS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Hission Creek at Copeland, Idaho

Location." Staff gage, lat. 48°54', long. 116°23', in SEi sec. 18, T. 64 N., R. 1 E., 400

 feet upstream from trestle on Kootenai Valley branch of Great Northern Railway and 0.8

mile south of Copeland. 

Drainage area-.- 31 square miles. 

Records available.- May 1928 to September 1934. 

Extremes.- Maximum discharge observed, 370 second-feet May 22, 1932j maximum gage height

 observed, 3.35 feet May 12, 1928; minimum discharge observed, 1 second-foot Aug. 26,

1934 (gage height, 0.50 foot). 

Remarks.- Some flow naturally diverted from Mission Creek to Round Prairie Creek, in

Moyle River Basin, at divide 5 miles above station. Quantity diverted is dependent

upon collection of drift at point of diversion. Ho other diversion or regulation

above station.

nonthly discharge of Mission Creek at Copeland, Idaho

Month

1928

July...........................................

1928-29

May............................................

July. ..........................................

1930

September. .....................................

1930-31

April..........................................

May............................................

July. ..........................................

1938

_ . . , _, 1932- 33

April. .........................................

Discharge in second-feet

Maximum

256 

100 

45 

12 

8

11 

16 

117 

179 

100 

29 

6.0 

7.7

128 

96 

85 

20 

6 

6

-

16 

22 

114 

178 

36 

13 

4 

8

21 

125 

351 

193 

' 30 

6 

4

-

20 

244 

249 

216 

49 

10 

8

Minimum

116 

20 

12 

8 

6

-

9 

4.5 

7.7 

68 

34 

6.0 

3.3 

3.1

25 

41 

21 

6 

4 

4

-

3 

8 

16 

38 

13 

4 

3 

3

9 

23 

107 

33 

6 

4 

3

-

21 

104 

55 

10 

3 

3

Mean

194 

46.1 

26.5 

9.5 

7.1

-

10.3 

7.22 

29.1 

110 

75.5 

13.5 

4.24 

3>69

22.5 

80^9 

61.7 

39.8 

12.1 

4.9 

4.3

-

6.5 

15.0 

44.2 

102 

20.8 

7.9 

3.3 

3.9

12.6 

72.5 

241 

91.1 

14.0 

4.6 

3.6

-

4.1 

8.4 

70.1 

174 

128 

20.6 

6.3 

5.0

Run-off 

in 

acre-feet

8,850 

2,740 

1,630 

584 

422

14,200

59.5 

215 

1,730 

6,760 

4,500 

830 

S61 

S20

89 

4,810 

3,790 

2,370 

744 

301 

256

12,400

142 

536 

2,630 

6,270 

1,240 

486 

203 

232

775 

4,310 

14,800 

5,420 

861 

283 

214

26,700

171 

516 

4,170 

10,700 

7,620 

1,270 

387 

298
KOOTENAI RIVER BASIN 63

Monthly discharge of Mission Creek at Copeland, Idaho Continued

Month

1934

April. . .........................................

Discharge in second-feet

Maximum

78 

281 

176 

42 

13 

5 

6

-

Minimum

67 

45 

13 

4 

2 

2

-

Mean

32.8 

158 

97.9 

23.9 

7.6 

3.4 

3.4

-

Run-off 

in 

acre-feet

2,020 

9,400 

6,020 

1,420 

466 

206 

202

19,730

Rock Creek near Copeland, Idaho

Location.- Staff gage, lat. 48°51', long. 116°22', in KWi sec. 5, T. 63 N., R. 1 E., at

trestle on Eootenai Valley branch of Great Northern Railway, 4.7 miles south of

Copeland.

Drainage area.- 14.3 square miles. 

Records available.*- May 1928 to September 1934. 

Extremes.- Maximum discharge observed, 86 second-feet Apr, 26, 1933 (gage height, 2.44

feetJ; minimum discharge, 0.1 second-foot July 20 to Sept. 7, 1931, Aug. 3, 5-10, 14,

15, 17-19, 1932, Aug. 23-25, 1934. 

Remarks. No diversions above station.

Monthly disonarge of Rook Creek near Copeland, Idaho

Month

1928

July. ...........................

August 1-20 .....................

1929

May ............................

July 1-16 ......................

1930 

March 23-31. ....................

May.............................

1931 

March 14-31 .....................

April

1932 April...........................

September. ................. .....

Discharge in second-feet

Maxlnrum

21 

5.6 

8.6

-

9.5 

37 

16 

14

-

26 

20 

16 

6 

2 

.5 

.4

-

19 

20 

7.8 

1.1 

.5 

.1 

.2

-

62 

29 

17 

1.7 

.2 

.3

-

Minimum

3.5 

2.3

-

.7 

1.9 

.4 

.7

-

10 

5 

3 

1 

.4 

.3 

.3

-

2.7 

8.4 

.8 

.4 

.1 

.1 

.1

-

20 

4.4 

.8 

.2 

.1 

.2

-

Mean

8.53 

3,70 

2.62 

.39

-

3.41 

11.8 

7.52 

5.66 

.956

-

15.3 

12.2 

5.4 

2.7 

.59 

.39 

.37

-

8.54 

11.6 

2.91 

.57 

.24 

.10 

.18

-

32.8 

13.7 

4.21 

.49 

,16 

.21

-

Per 

square 

mile

0.597 

.269 

.183 

.027

-

.238 

.825 

.526 

.396 

.067

-

1.07 

.853 

.378 

.189 

.048 

.027 

.026

-

.597 

.811 

.203 

.040 

.017 

.0070 

.013

-

2,29 

.958 

.294 

.034 

.011 

.015

-

Run-off

Inches

0.53 

.29 

.21 

.02

-

.13 

.92 

.61 

.44 

.04

-

.36

.95 

.44 

.21 

.06 

.03 

.03

-

.40 

.90 

.23 

.05 

.02 

.008 

.01

-

2.56 

1.10 

.33 

.04 

.01 

.02

-

Acre-feet

406 

220 

161 

15

802

101 

702 

462 

337 

30

1,630

273 

726 

332 

161 

42 

24 

22

1,580

. 305 

690 

179 

34 

15 

6.1 

11

1,240

1,950 

842 

251 

30 

9.8 

12

3,090
64 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938 '

Monthly discharge of Rook Creek near Copeland. Idaho Continued

Discharge in seeond*feet

Per 

square 

mile

Run-off

Inches Acre feet

October... 

November.. 

December.. 

January... 

February.. 

March.....

April.....

May.......

June......

July......

August....

September.

31

86

41

5.3

24

6.1

1.3

0.33

2.00

1.85

1.89

1.25

8.0

42.7

19.5

2.91

.61

.20

.27

0.023 

.140 

.129 

.132 

.087 

.559 

2.99 

1.36 

.SOS 

.043 

.014 

.019

0.03

,16

.15

.15

.09

,64

3.34

1.57

.23

.05

.02

.02

20

119

114

116

69

492

2,540

1,200

173

38

12

16

The year. 86 6.78 .474 6.45 4,910

1933-34 

October 1-20 ......

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

54

72

11

1.8

.4

.2

.3

9

1.5 

.4 

.2 

.1 

.2

.28

21.0

25.7

6.07

.82

.25

.19

.22

1.47

1.80

.424

.057

.017

.013

.015

1.69

2.01

,49

.06

.02

.01

.02

11

1,290

1,530

373

49

15

12

13

Brush Creek near Copeland, Idaho

Location.- Staff gage, lat. 48°53«, long. 116°22'30", in SEi sec. 19, T. 64 N., R. 1 E., 

at wooden bridge on valley road paralleling Kootenai Valley branch of Great Northern 

Railway, 1.8 miles south of Copeland.

Drainage area.- 7,2 square miles.

Records available.- May 1928 to September 1934-

Extremes.- Maxlirum discharge observed, 68 second-feet Apr. 26, 1933; no flow at times.

Remarks.- Small diversion from Brush Lake about 2 miles above station for irrigation; 

some regulation at outlet of Brush Lake.

_________ Monthly discharge of Brush Creek near Copeland, Idaho

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1928 

May 14--31...................

June........................

July........................

August 1-20.................

The period...............

1929 

March 31....................

April.......................

nay.........................

June........................

July 1-16 ..................

The period...............

1930 

March 83-31.................

April.......................

May ........................

June........................

July .......................

August .....................

September...................

The period...............

1931 

April 22-30.................

May.........................

June........................

July........................

August......................

September...................

The period...............

9.1 

4.3 

2.4

1.5 

.5

3.66

2.01

.822

,060

131

120

51

2.4

304

7.1 

11,7 

28

8.V

7.1 

0

7,10

5.19

6.16

2.61

.75

14

309

379

155

24

881

25

16

2

14

1

1

1

19.2 

8.1 

1.2 

2.9 

'.33 

.10 

.10

343

482

74

173

20

6.1

6.0

1,100

6.2

10

.3

.1

0

0

1.5 

.1 

.1

0

0

0

3.94

2.75

.19

.01

0

0

52

169

11

0* 

0
KOOTENAI RIVER BASIN 65

Monthly discharge of Brush Creek near Copeland, Idaho Continued

Month

Discharge In second-feet

Mean

Run-off

In 

acre-feet

1932 

April..........................

May* ...........................

June ...........................

July...........................

August «........,..,........,.,

The period..................

1932*33 

October .,,.,...,,....,..,.....

November.....,..;......,.......

December.......................

January .......................

February ......................

March .........................

April..........................

May ...........................

June ..........................

July...,,......................

August ....,.,.....,,,.........

September .....................

The yeax....................

1933-34 

October 1-12...................

March..........................

April..........................

May............................

June..,.,.......,,,..,,,.......

July...........................

August....,.,,,..........,.....

September..,..,..........,,..,.

41

18

7.2

0.1

0.1

36

68

28

15

33

13

.2 

,09 

.07 

.01

12

24

4.1

5.8 

.04 

.03 

.00 

.00 

.00

20.1 

8.5 

2.2 

.02 

.03

.07

.21

.34

.87

.68

7.08

38.2

15.5

3.02

.20

.20

.15

5.53

.10

7.50

13.4

3.60

.081

.029

.016

.006

1,200

523

131

1.2

1.8

1,860

4.3

12

21

53

38

435

2,270

953

180

12

12

8.9

4,000

2.4

461

796

222

4.8

1.8

1.0

.4

Parker Creek near Copeland, Idaho

Location.- Staff gage, lat. 48°55', long. 116°29', in SWi sec. 8, T. 64 N., R. 1 W., at

U. S. Poreat Service bridge 4^ miles west of Copeland. 

Drainage area.- 16.5 square miles. 

.Records available.- May 1928 to September 1934. 

Extremes.- M-ixiraum discharge, 400 second-feet (estimated) June 15, 1933; minimum, 1

second-foot Sept 4-6, 1930. 

Remarks.- No diversions above station.

____________Monthly discharge of Parker Creek near Copeland, Idaho____________

Discharge In second-feet

Minimum

Per

square 

mile

Inches Acre-feet

May 12-31... 

June .......

July........

August 1-10.

The period.

April.....

May.......

June......

July......

August ... 

September.

1929

The peilod.

April.....

May.......

June......

July......

August....

September.

The period.

24

144

54.7

20.2

5.6

8.73

3.32

1.22

.339

6.49

3.70

1.41

.13

5,710

3,250

1,240

111

10,300

90

10

3

20

4

16.1 

78.9 

55.6

9.26 

' 2.2

2.0

.976

4.78

3.37

.561

.133

.121

1.09

5.51

3.76

.65

.15

.14

958

4,850

3,310

569

135

119

133

83

95

23

7

8

17

42

22

5

3

1

77.3

58.7

54.8

11.5

4.0

3.4

4.68

3.56

3.32

.697

.242

.206

5.22

4.10

3.70

.80

.28

.23

4,600

3,610

3,260

707

246

202

12,600
66 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Parker Creek near Copeland, Idaho Continued

Month

Discharge In second-feet

.Per 

square 

mile

Run-off

Inches Acre-feet

1931 

March 16-31............

April ................

May...................

June..................

July..................

August................

September.............

The period.........

1932 

March 14-31...........

April.................

May ..................

June ..................

July..................

August................

September.............

The period.........

1932-33 

October 1-21..........

March 24-31...........

April.................

May ..................

June..................

July..................

August................

September,............

1933-34 

October 1-19..........

March.................

April.................

May...................

June..................

July..................

August................

September.............

15

54

165

60

12

5

5

19

85

170

140

400

107

19

32

219

6

7

60

12

5

2

2

8.9

20.1

94.0

27.1

7.5

3.3

2.9

0.539

1.22

5.70

1.64

.455

.200

.176

0.32

1.36

6.57

1.83

.59

.23

.20

13

23

58

48

15.4

51.5

114

93.7

16.7

4.7

3.0

.933

3.12

6.91

5.68

1.01

.985

.182

.62

3.48

7.97

6.34

1.16

.33

.20

13

3

4.0

8.5

32.3

101

180

49.8

7.4

4.5

.242 

.515 

1.96 

6.12 

10.9 

3.02 

;448 

.273

.19

.15

2.19

7.06

12.16

3.48

.52

.30

6.3

14.8

99.9

131

61.7

13.4

3.5 Z'.S

.382

.897

6.05

7.94

3.74

.812

.219

.200

.27

1.03

6.75

9.15

4.17

.94

.24

.92

989

1,900

5,780

1,610

461

203

173

9,710

550

3,060

7,010

5,580

1,030

289

179

17,700

167

135

1,990

6,210

10,700

3,060

455

268

236

908

5,940

8,050

3,670

895

214

198

Long Canyon Creek near Port Hill, Idaho

Location.- Water-stage recorder, lat. 48°57', long. 116°39', In MWj sec. 36, T. 65 H.,R. 

2 W., on TJ. S. Forest Service bridge at mouth of canyon, 4 miles southwest of Port 

Hill.

Drainage area.- 29 square miles.

Records available.- May 1928 to September 1938.

Extremes.- Maximum dally discharge, 950 second-feet (estimated) June 15, 1933; maximum 

gage height, 6.55 feet, drift jam, June 14, 15, 1933; minimum discharge, 3 secondfeet Nov. 1-3, 28, Dec. 4-10, 1936, Jan. 6-8, 1937; minimum gage height, 0.91 foot 

Nov. 8, 1930.

Remarks.- No diversions above gage.

Monthly discharge of Long Canyon Creek near Port Hill, Idaho

Month

Discharge In second-feet

Minimum

Per 

square 

mile

Inches Acre-feet

May 18-31, 1928. 

June............

July............

August..........

September 1-6... 

The period....

448

87

19

10

79

20

8

8

340

134

45.6

11.8

8.67

11.7

4.62

1.57

.407

.209

6.09

5.16

1.81

.47

.07

9,440

7,970

2,800

726

103

21,000

April 1929... 

May..........

June.........

July.........

August.......

September....

The period.

580

258

65

13

66

14

28.6

195

149

31.5

9.65

6.10

6.72

5.14

1.09

.333

.210

1.10

7.75

5.74

1.26

.38

.23

1,700

12,000

8,870

1,940

593

563

25,500
KOOTENAI RIVER BASIN 67

Monthly discharge of Long Canyon Creek near Port Hill, Idaho Continued

Month

Discharge in second-feet

Per

square 

mile

March 20-31, 1930....

April............:...

May..................

June.................

July.................

August...............

September............

The period.........

October 1930.........

November 1-15........

February 26-28, 1931. 

March................

April................

May..................

June.................

July.................

August...............

September............

October 1931.........

November 1-20........

March 2-31, 1932.....

April................

May..................

June.................

July.................

August...............

September............

October 1932.........

November.............

December 1-8.........

Mar'ch 16-31, 1933....

April................

Hay..................

June.................

July.................

August...............

September............

October 1933.........

November.............

December.............

March 1934...........

April................

May..................

June.................

July.................

August...............

September............

October 1934.........

November.............

December.............

January 1935.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

Water year 1934-35.

October 1935.........

November.............

December.............

Calendar year 1935.

January 1936.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

Water year 1935-36.

30

328

238

166

51

12

11

16

13

8

25

97

347

187

45

12

16

59

127

436

327

98

17

10

26

74

96

19

186

466

950

229

36

31

133

86

157

58

695

486

185

51

14

10

26

134

40

33

79

595

445

121

22

10

595

18

595

9

204

420

138

28

7

11

11

26

115

50

12

6.4

5.9

17.8

151

166

102

24.7

8.71

6.80

0.614

5.21

5.72

3.52

.852

.300

.234

0.27

5.81

6.60

3.93

.98

.35

.26

8

8

13

128

48

12

7

31

69

116

109

18

7

30

12

19

118

250

37

13

11

15 

42 

33 

24 

55 220' 

55 

14

8

7

7.6

7.3

8.0

12.4

32.2

222

91.7

23.6

8.5

8.3

9.3

13.7

38.8

100

284

233

44.5

11.6

7.1

10.7 

24.9 

65.6 

13.9 

54.2

218

459

109 

21.8 

 16.0

34.8

53.1

57.0

34.2

246

330

120

27.5

9.8

8.0

.262

.252

.276

.428

1.11

7.66

3.16

.814

.293

.286

~ .321 

.472 

1.34 

3.45 

9.79 

8.03 

1.53 

.400 

;245

.369 

.859

2.! 

.479

1.87

7.52 

15.8

3.76 

.752 

.552

1.20

1.83

1.97

1.18

8.48

11.4

4.14

.948

.338

.276

.30

.14

.03

.49

1.24

8^83

3.53

.94

.34

.32

.37

.35

1.50

3.85

11.29 - 06

1 i

.4

.27

.42 

.96

.r

.29

2.09

8.67

17.63

4.34

.87

.62

1.38

2.04

2.27

1.36

9.46

13.14

4.62

1.09

.39

.31

7 16

19

17

77

101

23

10.6

65.6

25.6

28.5

31.7

23.3

37.7

237

228

54.0

13.7

7.0

.366

2.26

.883

.983

1.09

.803

1.30

8.17

7.86

1.86

.472

.241

.42

2.52

1.02

1.13

1.14

.93

1.45

9.42

8.77

2.14

.54

.27

63.6 2.19 29.75

7.1 

6.0 

5.1

.245

.207

.176

.28 

.23 

.20

1.95 26.50

4

5

143

27

8

4

4

4.9

4.0

5.8

84.7

245

66.3

15.4

5.6

5.7

.169

.138

.200

2.92

8.45

2.29

.531

.193

.197

.19

.15

.23

3.26

9.74

2.56

.61

.22

.22

420 38.1 1.31

424

8,980

10,200

6,070

1,520

536

405

28,100

467

217

48

762

1,920

13,600

5,460

1,450

523

494

572

543

2,310

5,950

17,500

13,900

2,740

713

422

658

1,480

1,040

441

3,230

13,400

27,300

6,700

1,340

952

3,160

3,500

2,100

14,670

20,290

7,130

1,690

605

474

653

3,900

1,570

1,750

1,760

1,430

2,240

14,560

13,560

3,320

841

415

46,000

436

355

311

40,980

300

230

355

5,040

15,060

3,950

944

347

341

27,670
68 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Long Canyon Creek near Port Hill, Idaho Continued

Month

October 1937

Calendar year 1937 ..........

May...........................

Water year 1937-38. .........

Discharge in second-feet

Maximum

6 

5

420

8 

46 

385 

426 

114 

25 

24

426

51 

50 

40

426

30 

20 

34 

363 

782 

460 

128 

16 

9

782

Minimum

4 

3

-

4 

8 

39 

133 

19 

9 

8

-

8 

22 

12

-

12 

12 

13 

18 

140 

139 

17 

7 

6

6

Mean

4.87 

4.27 

6.10

37.9

4.29 

4.00 

5.32 

22.4 

182 

262 

45.4 

14.2 

9.90

47.1

15.9 

35.7 

24.4

52.1

20.6 

14.2 

19.2 

111 

327 

276 

54.6 

11.0 

6.9

76.6

Per 

square 

mile

0.168 

.147 

.210

1.31

.148 

.138 

.183 

.772 

6.28 

9.03 

1.57 

.490 

.341

1.62

.548 

1.23 

.841

1.80

.710 

.490 

.662 

3.83 

11.3 

9.52 

1.88 

.379 

.238

2.64

Run-off

Inches

0.19 

.16 

.24

17.77

.17 

.14 

.21 

.86 

7.24 

10.08 

1.81 

.56 

.38

22.04

.63 

1.37 

.97

24.42

.82 

.51 

.76 

4.27 

13.03 

10.62 

2.17 

.44 

.27

35,86

Acre-feet

300 

254 

375

27,500

264 

222 

327 

1,330 

11,170 

15,570 

2,790 

875 

589

34,070

980 

2,120 

1,500

37,740

1,270 

791 

1,180 

6,630 

20,090 

16,450 

3,360 

676 

413

55,460

Smith Creek near Port Hill, Idaho

Location.- Water-stage recorder, lat. 48°57'40n , long. 116 033'20n , in NEi sec. 26, T. 65 

N-, R. 2 W., at U. S. Forest Service bridge 1 mile south of Smith Creek ranger station 

and 4 miles southwest of Port Hill.

Drainage area.- 70 square miles.

Records available.- May 1928 to September 1938.

Extremes.- Maximum discharge, 3,060 second-feet June 14, 1933 (gage height, 7.15 feet); 

minimum, 4 second-feet Dec. 4-10, 1936; minimum gage height, 0.78 foot Sept. 4, 1931.

Remarks.- No diversions or regulation above gage.

Monthly discharge of Smith Creek near Port Hill, Idaho

Month

1928

1929

May............................

1930

Discharge in second-feet

Maximum

1,340 

613 

257 

38 

14

-

464 

1,240 

771 

107 

17

-

92 

1,040 

799 

538 

91 

15 

17

-

Minimum

790

41 

13 

9.5

-

37

116 

17 

6.5 

5.5

-

32 

90 

302 

83 

16 

6.8 

6.4

-

Mean

1,170 

336 

118 

21 .9 

11.4

-

39.9 

104 

606 

406 

47.0 

10.5 

6.82

-

52.6 

489 

458 

201 

40.9 

10.4 

8.36

-

Per 

square 

mile

16.7 

4.80 

1.69 

.313 

.163

-

.570 

1.49 

8.66 

5.80 

.671 

.150 

.097

-

.751 

6.99 

6.54 

2.87 

.584 

.149 

.119

-

Run-off

Inches

12.42 

5.36 

1.95 

.36 

.05

-

.34 

1.66 

9.98 

6.47 

.77 

.17 

.11

-

.31 

7.80 

7.54 

3.20 

.67 

.17 

.13

-

Acre-feet

46,400 

20,000 

7,260 

1,350 

181

75,200

1,270 

6,190 

37,300 

24,200 

2,890 

646 

406

72,900

1,150 

29,100 

28,200 

12,000 

2,510 

640 

497

74,100
KOOTENAI RIVER BASIN 69

Monthly discharge of Snith Creek near Port Hill, Idaho Continued

Discharge in second-feet

Minimum

Per

square 

mile

Run-off

Inches Acre-feet

1930-31 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August................

September............

The year...........

1931-32 

October...............

November..............

December..............

January...............

February..............

larch.................

April.................

May...................

June..................

July..................

August................

September.............

The year............

1932-33 

October...............

November..............

December 1-8..........

March 16-31...........

April.................

May...................

June..................

July..................

August................

September.............

1933-34 

3etober...............

November..............

December 1-15.........

March.................

April.................

May...................

June..................

July..................

August................

September.............

1934-35 

October...............

November..............

December..............

January..'.............

February..............

March.................

April.................

May...................

June..................

July..................

August................

September.............

The year.............

1935-36 

October.......:.......

lovember..:...........

December..............

January...............

February..............

March.................

April.................

May...................

June..................

July..................

Vugust................

September.............

The year............

105

557

1,340

505

111

19

40

1,340

300

458

1,380

1,090

271

46

19

1,380

124

350

400

620

1,380

2,200

670

67

117

420

341

166

262

1,750

1,260

502

85

20

20

72

580

109

100

278

1,370

1,200

451

44

22

1,370

65

22

13

14

25

830

1,330

431

66

12

18

403

122

18

16.9

18.5

14.7

25.0

35.6

52.6

168

732

225

49.4

10.6

12.5

0.241

.264

.210

.357

.509

.751

2.40

10.5

3.21

.706

.151

.179

0.28

.29

.24

.41

.53

.87.

2.68

12.1

3.58

.81

.17

.20

114 1.63 22.16

95

142

402

261

28

11

16.3

35.5

24.4

18.2

139

134

288

881

706

108

19.8

10.8

.233

.507

.349

.260

1.99

1.91

4.11

12.6

10.1

1.54

.283

.156

.27

.57

.40

.30

2.15

2.20

4.59

14.53

11.27

1.78

.33

.17

8 198 2.83 38.56

8

34

130

314

645

61

14

13

33

115

105

70

206

615

88

18

7

6

35.9

124

264

38.1

166

644

,110

289

32.0

34.3

118

163

121

108

746

902

279

43.7

11.2

9.87

.513

1.77

3.77

.544

2.37

9.20

15.9

4.13

.457

.490

1.69

2.33

1.73

1.54

10.7

12.9

3.99

.624

.160

.141

.59

1.98

1.12

.32

2.64

10.61

17.74

4.76

.53

.55

1.95

2.60

.96

1.78

11.. 94

14.87

4.45

.72

.18

.16

48

48

267

306

48

14

9

22.2

220

74.6

76.2

80.5

61.7

118

727

682

160

25.2

11.5

.317

3.14

1.07

1.09

1.15

.881

1.69

10.4

9.74

2.29

.360

.164

.37

3.50

1.23

1.26

1.20

1.02

1.89

11.99

10.87

2.64

.42

.18

188 2.69 36.57

8

13

11

10

10

18

443

55

12

17.9

14.6

11.6

12.2

8.2

18.0

333

804

184

29.7

8.5

10.3

 .256 

.209 

.166 

.174 

.117 

.257

4.76 

11.5

2.63 

.424 

.121 

.147

.30

.23

.19

.20

.13

.30

5.31

13.3

2.93

.49

.14

.16

,040

,100

904

,540

,980

,230

,000

,000

,400

,040

652

744

82,600

1,000

2,110

1,500

1,120

8,000

8,240

17,100

54,200

42,000

6,640

1,220

649

144,000

2,210

7,380

4,190

1,210

9,880

39,600

66,000

17,800

1,970

2,040

7,260

9,680

3,610

6,640

44,370

55,450

16,630

2,690

688

587

1,360

13,090

4,590

4,680

4,470

3,790

7,010

44,730

40,610

9,830

1,550

686

136,400

1,100

867

714

752

470

1,100

19,800

49,410

10,920

1,820

526

615

1,330 121 1.73 23.68 88,O90
70 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Smith Creek near Port Hill, Idaho Continued

Month

3,936-37

1937-38

^arch

September. ....................

D.iacharge in aecond-feet

Maximum

11

20 

116 

1,160 

1,060 

232 

68 

64

1,160

193 

249 

180 

' 136 

60 

120 

1,440 

1,790 

1,400 

266 

30 

20

1,790

Minimum

8

8 

20 

138 

262 

32 

17 

14

-

22 

62 

40 

35 

33 

42 

58 

359 

300 

31 

11 

8

8

Mean

8.35 

7.93 

10.7 

8.61 

8.00 

13.5 

62.4 

623 

625 

86.5 

28:0 

20.8

126

55.2 

144 

83.3 

72.7 

41.4 

65.1 

369 

906 

810 

118 

19.4 

10.4

225

Per 

square 

mile

0.119 

.113 

.153 

.123 

.114 

.193 

.891 

8.90 

8.93 

1.24 

.400 

.297

1.80

.789 

2.06 

1.19 

1.04 

.591 

.930 

5.27 

12.9 

11.6 

1.69 

.277 

.149

3.21

Run-off

Inches

0.14 

.13 

.18 

.14 

.12 

.22 

.99 

10.26 

9.96 

1.43 

.46 

.33

24.36

.91 

2.30 

1.37 

1.20 

.62 

1.07 

5.88 

14.87 

12.94 

1.95 

.32 

.17

43.60

 Acre-feet

514 

472 

657 

530 

444 

833 

3,710 

38,280 

37,220 

5,320 

1,720 

1,240

90,940

3,390 

8,580 

5,120 

4,470 

2,300 

4,000 

21,930 

55,680 

48,200 

7,260 

1,190 

617

162,700

Yearly discharge of Smith Creek near Port Hill, Idaho

Year

1 QV\

1 Q*^Q

1 Q^fi

1938...........

Year ending Sept. 30

Discharge in 

second- feet

Mean

114 

198 

188 

121 

126 

225

Per 

square 

mile

1.63 

2.83 

2.69 

1.73 

1.80 

3.21

Run-off

Inches

22.16 

38.56 

36.57 

23.68 

24.36 

43.60

Acre-feet

82,600 

144,000 

136,400 

88,090 

90,940 

162,700

Calendar year

Discharge in 

second-feet

Mean

116

166 

120 

147 

211

Per 

square 

mile

1.66

2.37 

1.71 

2.10 

3.01

Run-off

Inches

22.59

32.19 

23.41 

28.49 

40.90

Acre-feet

84,200

120,000 

87,060 

106,400 

152,700

Boundary Creek near Port Hill, Idaho 

(International gaging station)

Location.- Water-stage recorder, lat. 48°59 I 5011 , long. 116°34'05 n , in SWf sec. 11, T. 

65 N., R. 2 W., 140 feet below bridge at mouth of canyon, 0.2 mile south of international boundary, and 3 miles west of Port Hill.

Drainage area.- 97 square miles.

Records available.- May 1928 to September 1938.

Extremes.- Maximum discharge, 2,400 second-feet June 15, 1933 (gage height, 5.22 feet)) 

minimum, 5 second-feet sometime during period Nov. 10 to Dec. 3, 1936 (gage height, 

0.27 foot).

Remarks.- No diversions above gage. This is one of the international gaging stations 

maintained by the United States under agreement with Canada.

Monthly discharge of Boundary Creek near Port Hill, Idaho

Month

1928

Discharge in second-feet

Maximum

1,600

234 

50 

31

-

Minimum

1,240 

181 

53 

28 

21

-

Mean

1,400 

507 

139 

34.8 

27.5

-

Per 

square 

mile

14.4 

5.23 

1.43 

.359 

.283

-

Run-off

Inches

8.04 

5.84 

1.65 

.41 

.08

-

Acre-feet

41,700 

30,200 

8,550 

2,140 

436

83,000
KOOTENAI RIVER BASIN 71

Monthly discharge cf Boundary Creek near Port Hill, Idaho Continued

Discharge in second-feet

Maximum Minimum

Per 

square 

mile

Inches Acre-feet

1929 

April 18-30..........

May..................

June.................

July.................

August...............

September............

The period.........

1929-30 

October..............

November 1-4.........

March 21-31..........

April................

May..................

June.................

July.................

August...............

September............

1930-31 

October..............

November.............

December.............

January..............

February.............

larch................

April................

May..................

June.................

July.................

August...............

September............

The year...........

1931-32 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year...........

1932-33 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year...........

1933-34 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September*...........

The year...........

295

1,080

711

116

28

20

22

16

65

799

671

473

104

26

28

56

41

20

65

487

1,120

412

125

33

37

1,120

57

77

250

515

1,550

1,200

240

48

24

1,550

94

384

310

55

760

1,630

2,080

634

58

90

2,080

445

189

481

210

110

257

1,710

1,140

433

77

24

28

32

196

127

25

15

14

137

542

398

56.4

19.6

15.4

1.41

5.59

4.10

.581

.202

.159

0.68

6.44

4.57

.67

.23

.18

11

14

23

73

324

92

22

14

12

16.4

15.2

36.6

381

450

202

46.0

18.1

15.3

.169

.157

.377

3.93

4.64

2.08

.474

.187

.158

.19

.02

.15

4.38

5.35

2.32

.55

.22

.18

14

15

22

46

412

110

26

13

13

20.2

20.0

16.4

22.8

20.8

34.3

147

644

200

61.3

18.7

18.9

.208

.206

.169

.235

.214

.354

1.52

6.64

2.06

.632

.193

.195

.24

.23

.19

.27

.22

.41

1.70

7.66

2.30

.73

.22

.22

13 103 1.06 14.39

140

510

250

35

21

15

21.1

34.5

27.6

19.8

140

97.0

328

1,020

754

96.6

27.6

17.3

.218

.356

.285

.204

1.44

1.00

3.38

10.5

7.77

.996

.285

.178

.25

.40

.33

.24

1.55

1.15

3.77

12.11

8.67

1.15

.33

.20

14 215 2.22 30.15

14

18

59

414

689

58

25

24

33.2

78.4

95.6

56.1

37.3

39.0

198

783

1,200

240

36.1

38.2

.342

.808

.986

.578

.385

.402

2.04

8.07

12.4

2.47

.372

.394

.39

.90

1.14

.67

.40

.46

2.28

9.30

13.83

2.85

.43

.44

14 2.44 33.09

30

97

86

84

70

78

218

528

70

23

15

14

91.1

128

154

128

89.6

120

793

851

219

39.5

18.5

17.9

.939

1.32

1.59

1.32

.924

1.24

8.18

8.77

2.26

.407

.191

.185

1.08

1.47

1.83

1.52

.96

1.43

9.13

10.11

2.52

.47

.22

.21

3,530

33,300

23,700

3,470

1,210

916

66,100

1,010

121

799

22,700

27,700

12,000

2,830

1,110

910

1,240

1,190

1,010

1,400

1,160

2,110

8,750

39,600

11,900

3,770

1,150

1,120

74,400

1,300

2,050

1,700

1,220

8,050

5,960

19,500

62,700

44,900

5,940

1,700

1,030

156,000

2,040

4,670

5,880

3,450

2,070

2,400

11,800

48,100

71,400

14,800

2,220

2,270

171,000

5,600

7,610

9,480

7,870

4,980

7,400

47,200

52,300

13,000

2,430

1,140

1,060

1,710 14 221 2.28 30.95 160,100
72 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Boundary Creek near Port Hill, Idaho Continued

Month

Discharge In second-feet

Minimum

Per

square 

mile

Run-off

Acre-feet

1934-35 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year...........

1935-36 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year...........

1936-37 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year...........

1937-38 

October..............

November.............

December.............

January..............

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The year...........

62

288

80

120

92

327

1,400

1,200

413

54

33

1,400

74

32

23

22

35

905

1,370

394

71

21

35

1,370

18

16

20

126

1,100

1,020

247

63

50

1,100

124

118

100

74

48

100

960

1,920

1,280

266

34

28

59

48

50

316

298

58

25

18

26.2

118

51.7

72.8

83.4

63.8

137

769

700

152

36.2

21.8

0.270

1.22

.533

.751

.860

.658

1.41

7.93

7.22

1.57

.373

.225

0.31

1.36

.61

.87

.90

.76

1.57

9.14

8.06

1.81

.43

.25

17 186 1.92 26.07

16

20

18

20

19

18

474

67

20

13

14

28.5 

24.3 

20.4 

20.9 

18.2 

23.7

339

823

19* 

41.6 

16.3 

18.6

.294

.251

.210

.215

.188

.244

3.49

8.48

1.99

.429

.168

.192

.34

.28

.24

.25

.20

.28

3.89

9.78

2.22

.49

.19

.21

13 131 1.35 18.37

12

9

13

19

160

283

40

22

17

14.2 

14.1 

19.0 

14.7 

13.0 

15.1 

62.3

604

601

- 98.8 

31.5 

22.8

.146

.145

.196

.152

.134

.156

.642

6.23

6.20

1.02

.325

.235

.17

.16

.23

.18

.14

.18

.72

7.18

6.92

1.18

.37

.26

9 126 1.30 17.69

22

41

30

30

30

42

58

460

297

35

18

14

40.8

80.0

55.5

51.0

36.0

64.1

350

991

794

113

26.3

17.8

.421

.825

.572

.526

.371

.661

3.61

10.2

8.19

1.16

.271

.184

.49

.92

.66

.61

.39

.76

4.03

11.76

9.14

1.34

.31

.21

1,610

7,030

3,180

4,480

4,630

3,930

8,140

47,300

41,630

9,370

2,230

1,500

134,800

1,750

1,450

1,250

1,290

1,050

1,460

20,140

50,590

11,490

2,560

1,000

1,110

95,140

871

839

1,170

904

722

930

3,710

57,150

55,750

6,080

1,950

1,560

91,320

2,510

4,760

3,410

3,130

2,000

3,940

20,860

60,940

47,240

6,970

1,610

1,060

1,920 14 219 2.26 30.62 158,400

Yearly discharge of Boundary Creek near Port Hill, Idaho

Year ending Sept. 30

Discharge in 

second-feet

Per 

square 

mile

Inches Acre-feet

Calendar year

Discharge in 

second-feet

Mean square 

mile

Inches Acre-feet

1931.

1932.

1933.

1934.

1955.

103

215

257

221

1.06

2.22

2.44

2.28

1.92

14.59

50.15

55.09

50.95

26.07

74,400

156,000

171,000

160,100

154,800

105

226

251

206

176

1.08

2.55

2.59

2.12

1.81

14.71

51.60

55.04

28.85

24.65

76,000

164,000

181,000

149,200

127,500

1956.

1957.

1958.

151

126

219

1.55

1.50

2.26

18.57

17.69

50.62

95,140

91,520

158.400

129

157

215

1.55

1.41

2.20

18.07

19.20

29.78

93;570" 

99,220 

154.100
SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938 73

PEND OREILLE RIVER BASIN

Clark Pork above Missoula, Mont.

Location.- Water-stage recorder, lat. 46°53', long. 113°56', in NW^ sec. 19, T. 13 N.,

R. 18 W., 3 miles downstream from Blackfoot River and 3 miles east of Missoula. 

Records available.- March 1929 to September 1938. 

Extremes.- Maximum discharge, 21,600 second-feet June 2, 1933 (gage height, 9.90 feet);

minimum, 86 second-feet Jan. 8, 1930 (gage height, 0.52 foot), ice jammed above

gage. 

Remarks.- Slight regulation from operation of power plant near Bonner. Several small

diversions above station for irrigation.

Monthly discharge of Clark Pork above Missoula, Mont.

Month

1929 

March 16-31 ...................................

July. ..........................................

The period. ..................................

1929-30

April. . .........................................

1930-31

April

1931-32

The year. ...................................

Discharge in second-feet

Maximum

4,670 

3,770 

9,730 

9,730 

3,770 

1,950 

1,290

_

1,570 

1,570 

1,330 

843 

3,620 

2,680 

8,390 

8,390 

7,100 

2,100 

1,330 

1,720

8,390

2,170 

1,600 

1,370 

1,840 

1,350 

1,720 

1,910 

3,700 

3,210 

1,300 

1,040 

1,160

3,700

1,030 

1,070

2,350 

3,090 

12,200 

10,000 

3,400 

1,380 

 1,140

1&,SOO

Minimum

1,630 

1,760 

3,030 

3,860 

1,320 

834 

808

_

1,190 

897 

716 

224 

1,010 

1,060 

2,380 

5,000 

2,240 

2,120 

875 

674

224

1,140 

762 

818 

1,090 

1,110 

1,080 

1,480 

1,910 

1,290 

664 

368 

525

368

859 

720

1,260 

1,740 

2,720 

3,400 

1,180 

942 

762

-

Mean

2,280 

2,580 

5,780 

7,580 

2,230 

1,050 

969

_

1,310 

1,310 

951 

679 

2,010 

1,790 

5,010 

6,280 

4,030 

1,580 

1,130 

1,200

2,270

1,520 

1,360 

1,200 

1,250 

1,220 

1,400 

1,730 

2,960 

2,160 

868 

746 

781

1,430

936 

a985 

e860 

e810 

e940 

al,400 

2,480 

7,370 

6,600 

2,100 

1,070 

915

2,210

Run-off 

in 

acre-feet

72,400 

154,000 

355,000 

451,000 

137,000 

64,600 

57,700

1,290,000

80,600 

78,000 

58,500 

41,800 

112,000 

111,000 

298,000 

386,000 

240,000 

97,200 

69,500 

71,400

1,640,000

93,500 

80,900 

73,800 

76,900 

67,800 

86,100 

103,000 

182,000 

129,000 

53,400 

45,900 

46,500

tl, 039, 000

57,600 

58,600 

52,900 

49,800 

54,100 

86,100 

148,000 

453,000 

393,000 

189,000 

65,800 

54,400

1,602,000

t Figure previously published In error 

a Partly estimated, 

e Estimated.
74 SURFACE" WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Fork above Mlssoula, Mont. Continued

Month

1932-33

April. . .......................................

May. ...........................................

July. ..........................................

1933-34

May. ...........................................

1934-35

July. ..........................................

1935-36

May. ...........................................

July. ..........................................

1936-37

The year ....................................

Discharge In second-feet

Maximum

1,510 

1,500 

1,440

1,880 

5,540 

14,100 

19,400 

4,940 

1,740 

1,380

19,400

2,700 

3,280 

3,460 

3,460 

2,700 

4,940 

14,100 

12,000 

7,790 

2,480 

1,140 

1,560

14,100

1,560 

1,540 

1,400 

1,540 

1,540 

1,600 

3,060 

9,440 

7,920 

3,150 

1,160 

778

9,440

1,100 

1,230 

1,340 

1,100 

1,520 

2,130 

8,060 

12,300 

8,330 

2,120 

1,310 

1,520

12,300

1,260 

1,320 

1,130 

920 

1,120 

1,280 

2,000 

4,830 

3,920 

1,890 

1,110 

1,240

4,830

Minimum

680 

1,200 

469

1,130 

1,330 

3,820 

5,170 

1,620 

868 

1,180

_

1,110 

1,740 

1,500 

1,940 

1,500 

2,080 

4,720 

6,180 

2,340 

886 

760 

697

697

1,040 

1,260 

877 

670 

950 

940 

1,080 

2,960 

2,780 

904 

670 

654

654

590 

715 

534 

590 

520 

848 

776 

5,980 

2,190 

1,020 

474 

839

474

793 

767 

548 

400 

604 

724 

1,200 

1,930 

1,830 

920 

575 

340

340

Mean

1,130 

1,340 

940 

910 

871 

1,370 

2,270 

6,690 

13,800 

2,750 

1,280 

1,290

2,880

1,557 

2,373 

2,241 

2,527 

2,253 

3,071 

10,080 

8,535 

4,276 

1,528 

921 

875

3,350

1,235 

1,385 

1,218 

1,122 

1,162 

1,222 

1,903 

5,098 

5,480 

1,924 

895 

699

1,947

854 

1,098 

933 

905 

837 

1,517 

4,158 

8,186 

4,907 

1,447 

9,261 

1,020

2,234

1,061 

1,067 

990 

606 

850 

1,037 

1,615 

3,936 

3,211 

1,286 

810 

653

1,429

Run- off 

In 

acre-feet

69,500 

79,500 

57,800 

56,000 

48,400 

84,200 

135,000 

411,000 

821,000 

169,000 

78,700 

76,800

2,087,000

95,760 

141,200 

137,800 

155,400 

125,100 

188,800 

599,600 

524,800 

254,400 

93,960 

56,610 

52,060

2,425,000

75,930 

82,430 

74,870 

68,960 

64,560 

75,150 

113,200 

313,400 

326,100 

118,300 

55,060 

41,590

1,410,000

52,500 

65,320 

57,370 

55,650 

48,170 

93,300 

247,400 

503,300 

292,000 

89,000 

56,940 

60,710

1,622,000

65,220 

63,500 

60,900 

37,250 

47,220 

63,770 

96,120 

242,000 

191,100 

79,080 

49,820 

38,870

1,035,000
PEND OREILLE RIVER BASIN 75

Monthly discharge of Clark Pork- above Missoula, Mont. Continued

Month

1937-38

July. ..........................................

Discharge in second-feet

Maximum

1,000 

990 

1,650 

1,070 

1,180 

1,890 

4,210 

19,100 

15,900 

9,060 

2,100 

1,250

19,100

Minimum

843 

789 

500 

350 

500 

910 

1,120 

3,920 

6,810 

2,020 

861 

1,030

350

Mean

921 

882 

935 

830 

949 

1,257 

2,641 

7,940 

9,450 

4,784 

1,458 

1,121

2,770

Run- off 

in 

acre-feet

56,600 

52,470 

57,490 

51,010 

52,720 

77,320 

1S7.100 

488,200 

562,300 

294,100 

89,640 

66,680

2,006,000

Yearly discharge of Clark Pork above Missoula, Mont.

Year

193C.. ............

1933.. ............

1935.. ............

1936.. ............

1937.. ............

1938.. ............

Year ending Sept. 30

Mean discharge 

in second-feet

2,270 

1,430 

±2,210 

12,880 

3,350

1,947 

2,234 

1,429 

2.770

Run-off in

acre-feet

1,640,000 

1,039,000 

1,602,000 

2,087,000 

2,425,000

1,410,000 

1,622,000 

1,035,000 

2,006.000

Calendar year

Mean discharge 

in second-feet

2,310 

1,330 

2,260 

3,110 

3,155

1,867 

2,254 

1,398

Run-off in 

acre-feet

1,675,000 

959,700 

1,640,000 

2,255,000 

2,284,000

1,352,000 

1,636,000 

1,012,000

Clark Fork at Missoula, Mont.

Location.- Wire-weight gage, lat. 46°52', long. 114°00', in NEi sec.^21, T. 13 N., R. 19

W., on bridge of Bitterroot Valley branch of Northern Pacific Railway in Missoula. 

Records available.- July 1898 to June 1907. 

Remarks.- Several small diversions above station.

Monthly discharge of ClarK Pork at Missoula, Mont.

Month

1898 

July. .........................

The

1898-99

July..........................

a Partly estimated.

Discharge in second-feet

Maximum

7,300 

2,970 

1,935

-

2,000 

1,870 

1,680 

35,800 

22,400 

4,900 

2,725

-

Minimum

3,070 

1,740 

1,680

-

1,805 

1,620 

D .680 

13,700 

4,900 

2,650 

1,950

-

Mean

a4,668 

2,120 

1,808

-

1,841 

1,762 

al , 680 

25,858 

11,208 

3,592 

2,287

-

Per 

square 

mile

0.78 

.36 

.30

-

.31 

.30 

.28 

4.34 

' 1.88 

.60 

.38

-

Run- off

Inches

0.90 

.41 

.33

-

.36 

.33 

.32 

4.84 

2.17 

.69 

.42

-

Acre-feet

287,000 

130,000 

108,000

-

113,000 

105,000 

103,000 

1,540,000 

689,000 

221,000 

136,000

-
76 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Pork at Missoula, Mont. Continued

Month

1899-1900

April.........................

May. ..........................

July. .........................

1900-1901

April.........................

July..........................

September .....................

1901-2

July..........................

1902-3

July. .........................

1903-4

The year ...................

Discharge in second-feet

Maximum

2,500 

2,240 

2,180 

1.950 

6,950 

6,450 

23,600 

9,400 

3,300 

1,430 

2,347

-

1,690 

1,690 

1,885

20,200 

14,450 

4,650 

1,625 

I,6fe5

-

1,625 

1,625

1,900 

3,050 

17,350 

15,775 

6,975 

2,637 

1,865

-

1,980 

2,215

4,440 

4,550 

9,840 

21,900 

5,800 

2,440

-

1,705 

12,030 

16,650 

12,420 

3,910 

1,930 

1,485

-

Minimum

1,900 

1,850 

1,750 

730 

980 

2,512 

6,600 

3,500 

1,430 

1,030 

1,245

-

1,430 

1,430 

980

7,300 

5,150 

1,690 

980 

980

-

1,430 

1,365

1,580 

1,715 

2,787 

5,212 

2,787 

1,865 

 1,715

-

1,750 

1,650

1,530 

2,110 

3,430 

6,240 

2,440 

1,710

-

1,265 

1,760 

8,950 

3,910 

1,990 

1,160 

1,060

-

Mean

2,153 

2,138 

al,946 

al,4K9 

2,687 

4,877 

12,812 

6,361 

2,056 

1,268 

1,494

-

1,535 

al,560 

^1, 466 

2,090 

2,601 

15,156 

7,458 

2,815 

1,300 

1,415

- 1

1,472 

1,478

1,4:13

1,766 

2,383 

10,236 

8,852 

4,725 

2,136 

1,778

-

1,808 

1,875

el, 900 

el, 700 

2,018 

2,949 

5,817 

13,950 

3,976 

1,995 

el, 800

-

el, 700 

el, 500 

el, 500 

el, 300 

el, 300 

1,443 

6,701 

11,365 

8,161 

2,790 

1,478 

1,181

-

Per 

square 

mile

0.36 

.36 

.33 

.24 

.45 

.82 

2.15 

1.07 

.34 

.2t 

.25

-

.26 

.26 

.25 

.35 

.44 

2.54 

1.25 

.47 

.22 

.24

-

.25 

.25 

.24 

.30 

.40 

1.72 

1.49 

.79 

.36 

.30

-

.30 

.31

.319 

.285 

.339 

.495 

.976 

2.340 

.667 

.335 

.302

-

.285 

.252 

.252 

.218 

.218 

.242 

1.124 

1.907 

1.369 

.468 

.248 

.198

-

Run-off

Inches

0.42 

.40 

.38 

.28 

.52 

.92 

2.48 

1.19 

.39 

.24 

.28

-

.30 

.29 

.29 

.40 

.47 

2.93 

1.39 

.54 

.25 

.27

-

.29 

.28 

.09 

.35 

.45 

1.98 

1.66 

.91 

.42 

.33

-

.35 

.35

.37 

.30 

.39 

.56 

1.13 

2.61 

.77 

.39 

.34

-

.33 

.28 

.29 

.25 

.24 

.28 

1.25 

2.20 

1.53 

.54 

.29 

.22

-

Acre-feet

132,000 

127,000 

120,000 

89 . 700 

165,000 

290, 000 

788,000 

378,000 

126,000 

78,000 

88,900

-

94,400 

92,800 

90,100 

128,000 

155,000 

932,000 

444,000 

173,000 

79,900 

84,200

-

90,500 

87,900 

27,800 

109,000 

142,000 

629,000 

527,000 

290,000 

131,000 

106,000

-

111,000 

112,000

117, 000 

94,000 

124,000 

176,000 

358,000 

830,000 

244, 000 

123,000 

107, 000

104,000 

89,300 

92,200 

79,900 

74,800 

88,700 

399,000 

699,000 

486,000 

172,000 

90,900 

70,300

-

a Partly estimated, 

e Estimated.
PEND OREILLE PIVER BASIN 77

Monthly discharge of Clark Pork at Missoula, Hont. Continued

Month

Discharge in second-feet

Maximum square 

mile

Run-off

Inches Acre-feet

1904-5 

October............

November...........

December...........

March.............

April.............

Hay...............

June..............

July...............

August.............

September

The year.......

1905-6 

October...........

November 1-23....

February 20-28... 

March.............

April.............

Hay...............

June..............

July..............

August............

September.........

The year.......

1906-7 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

Hay...............

June..............

July..............

August............

September.........

The year.......

1,540

1,320

1,320

1,930

1,810

4,006

8,310

4,096

1,569

915

1,210

1,010

1,218

1,245

1,538

3,086

1,385

870

74S

1,241

1,263

1,204

1,427

1,442

2,497

5,429

2,182

1,132

819

0.208

.212

.202

.239

.242

.419

.911

.366

.190

.137

0.24

.24

.23

.28

.27

.48

1.02

.42

.22

.15

76,300

75,100

74,000

87,900

85,800

154,000

323,000

134,000

69,600

48,700

1,290

1,200

1,500

3,060

4,460

6,490

7,490

3,780

1,500

1,460

908

1,009

810

810

1,590

3,360

3,570

1,220

915

915

1,069

1,140

1,060

1,480

2,560

4,510

5,510

2,060

1,170

1,100

.179

.191

.178

.248

.430

.757

.924

.346

.196

.185

.21 

.16 

.06 

.29 

.48 

.87 

1.03 

.40 

.23 

.21

65,700

52,000

18,900

91,000

152,000

277,000

328,000

127,000

71,900

65.500

1,440

4,900

2,120

7,550

8,980

18,400

17,200

990

1,330

1,620

1,950

4,400

5,OPO

11,200

1,150

2,360

1,920

e770

el,700

3,010

6,540

10,500

14,500

.193

.396

.322

.129

.285

.505

1.10

1.76

2,43

.22

.44

.37

.15

.30

.58

1.23

2.04

2.71

70,700

140,000

118,000

7,300

94,400

185,000

389,000

646,000

863,000

e Estimated.

Clark Fork below Missoula, Hont.

Location.- Water-stage recorder, lat. 46°52', long. 114°07', in SEj sec. 21, T. 13 N.,

R. 20 W., 2 milea downstream from Bitterroot River and 6 miles west of~ Missoula. 

Records available.- October 1929 to September 1938.

.- ~ --_ _-, .-_ ___., ce present), 

irrigs

Honthly discharge of Clark Fork below Hissoula, Mont.

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

October... 

November.. 

December.. 

January... 

February.. 

March.....

April.....

May.......

June......

July......

August....

September.

1929-30

2,240

2,320

3,360

2,240

4,520

4,040

17,500

16,600

15,200

4,640

2,020

2,580

1,800

1,500

1,600

1,010

1,810

1,990

3,700

8,610

4,900

1,680

1,300

1,060

"2,060 

2,100 

2,440 

1,380 

2,900 

2,860 

9,610 

11,800 

8,980 

2,890 

1,650 

1,950

127,000

125,000

150,000

84,800

161,000

176,000

572,000

726,000

534,000

178,000

101,000

116,000

The year. 17,500 1,010 4,220 3,050,000

527283 O - 43 - 6
78 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Fork below Mlssoula, Mont. Continued

Month

1930-31

May. ...........................................

1931-32

July. ..........................................

1932-33

July. ..........................................

1933-34

The year. ...................................

1934-35

Discharge In second-feet

Maximum

3,600 

3,150 

2,530 

2,300 

2,200 

2,500 

3,370 

11,800 

8,960 

2,650 

1,020 

1,940

11,800

1,680 

1,720 

1,810 

1,810 

4,180 

3,570 

5,850 

24,000 

20,500 

8,280 

2,290 

1,760

24,000

2,470 

2,740 

2,380 

2,290 

1,560 

2,840 

11,700 

22,200 

36,300 

12,400

36,300

4,680 

10,800 

25,100 

21,800 

14,300 

4,160 

1,730 

2,690

25,100

3,040 

3,130 

2,520 

2,520 

2,5ZO 

3,770 

5,830 

19,200 

16,800 

6,560 

1,680 

1,170

19,200

Minimum

2,420 

2,040 

1,050 

948 

1,680 

1,830 

2,380 

3,710 

2,460 

700 

621 

594

594

1,400 

940 

910 

1,050 

940 

1,600 

2,650 

5,080 

8,790 

2,290 

1,370 

1,210

910

1,410 

2,040 

610 

580 

640 

1,440 

2,380 

6,810 

13,200 

2,200

580

3,400 

4,160 

8,660 

11,200 

4,060 

1,570 

1,150 

1,110

1,110

1,960 

2,440 

1,730 

875 

1,760 

1,800 

2,030 

5,560 

5,290 

1,760 

935 

946

875

Mean

2,900 

2,590 

1,890 

1,800 

1,910 

2,110 

2,960 

7,950 

5,270 

1,340 

753 

1,170

2,720

1,560 

1,490 

1,520 

1,410 

1,640 

2,390 

4,230 

14', 900 

14,300 

4,300 

1,660 

1,490

4,250

1,940 

2,320 

1,480 

1,660 

1,110 

2,030 

4,030 

11,200 

27,200 

5,620 

al,750 

el, 700

5,170

a2,700 

e4,150 

e3,950 

a4,400 

4,232 

6,028 

16,500 

15,110 

7,843 

2,866 

1,356 

1,399

5,875

2,392 

2,845 

2,207 

1,995 

2,035 

2,421 

3,556 

10,090 

10,930 

3,488 

1,263 

1,010

3,690

Run-off 

in 

acre-feet

178,000 

154,000 

116,000 

111,000 

106,000 

130,000 

176,000 

489,000 

314,000 

82,400 

46,300 

69,600

1,970,000

95,900 

88,700 

93,500 

86,700 

94,300 

147,000 

252,000 

916,000 

851,000 

264,000 

102,000 

88,700

3,080,000

119,000 

138,000 

91,000 

102,000 

61,600 

125,000 

240,000 

689,000 

1,620,000 

346,000 

108,000 

101,000

3,740,000

166,000 

247,000 

243,000 

271,000 

235,100 

370,700 

981,800 

929,300 

466,700 

176,200 

83,400 

83,250

4,253,000

147,100 

169,300 

135,700 

122,700 

113,000 

148,800 

211,600 

620,400 

650,400 

214,500 

77,630 

60,110

2,671.000

a Partly estimated 

e Estimated.
PEND OREILLE RIVER BASIN 79

Monthly discharge of Clark Pork below Mlsaoula, Mont. Continued

Month

1935-36

April. .........................................

July. ..........................................

1936-37

May. ...........................................

1937-38

July. ..........................................

The year. ...................................

Discharge In second-feet

Maximum

1,720 

2,080 

1,950 

1,800 

2,300 

3,880 

17,800 

26,700 

20,200 

3,680 

1,880 

2,160

26,700

2,140 

2,220 

1,870 

1,180 

1,500 

2,060 

3,110 

11,300 

9,320 

3,710 

1,480 

1,710

11,300

1,510 

1,640 

2,920 

1,860 

1,720 

3,110 

12,000 

35,700 

30,800 

14,500 

2,470 

1,770

35,700

Minimum

1,160 

1,510 

1,100 

930 

800 

1,570 

1,410 

12,000 

3,990 

1,460 

860 

1,020

800

1,300 

1,370 

1,080 

660 

872 

1,310 

1,780 

3,000 

3,820 

1,290 

817 

660

660

1,320 

1,340 

1,040 

810 

975 

1,620 

2,030 

7,220 

13,200 

2,640 

1,670 

1,400

810

Mean

1,475 

1,842 

- 1,570 

1,492 

1,321 

2,482 

8,414 

17,190 

10,430 

2,307 

1,195 

1,574

4,277

1,679 

1,749 

1,625 

871 

1,249 

1,743 

2,379 

8,306 

7,247 

2,043 

1,117 

909

2,582

1,393 

1,471 

1,714 

1,512 

1,498 

2,234 

5,340 

15,040 

18,890 

7,259 

1,957 

1,575

4,999

Run- off 

in 

acre-feet

90,700 

109,600 

96,520 

91,780 

75,970 

152,600 

500, 600 

1,057,000 

620,800 

141,900 

73,490 

93,640

3,105,000

103,200 

104,100 

99,950 

53,550 

69,380 

107,200 

141,500 

510,700 

431,200 

125,600 

.68,670 

54,080

1,869,000

85,670 

87,510 

105,400 

92,960 

83,200 

137,400 

317,700 

924,500 

1,124,000 

446,400 

120,400 

93,700

3,619,000

Yearly discharge of Clark Fork below Missoula, Mont.

Year

1931. ............

1938...... .......

1933. ............

1934.............

1935. ............

1937. ............

1938. ............

Year ending Sept. 30

Mean discharge 

In second-feet

4,220 

2,720 

4,250 

5,170 

5,875

3,690 

4,277 

2,582 

4,999

Run-off in 

acre-feet

3,050,000 

1,970,000 

3,080,000 

3,740,000 

4,253,000

2,671,000 

3,105,000 

1,869,000 

3,619,000

Calendar year

Mean discharge 

in second-feet

4,280 

2,490 

4,340 

5,590 

5,594

3,475 

4,291 

2,542

Run-off In 

acre-feet

3,100,000 

1,800,000 

3,150,000 

4,050,000 

4,050,000

2,516,000 

3,115,000 

1,840,000
80 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Clark Pork at St. Regia, Mont.

Location.- Water-stage recorder, Lat. 47°18', long. 115°05', in sec. 19, T. 18 H., R. 27 

W., at St. Regis, half a mile downstream from St. Regis River. Prior to Nov. 29, 1933, 

staff gage at same site and datum.

Drainage area.-- 10,500 square miles.

Records available.- October 1910 to September 1923, February 1929 to September 1938.

Extremes.- Maximum discharge observed, 62,800 second-feet Hay 30, 31, 1913 (gage height, 

19.1 feet); minimum daily, 1,050 second-feet February 19-22, 1929.

Remarks.- Many diversions above station.

Monthly discharge of Clark Fork at St. Regis, Mont.

Month

1910-11

Hay. ...........................................

July. ..........................................

1911-12

July. ..........................................

1912-13

Mntr

July. ..........................................

The year. ...................................

1913-14

July. ..........................................

September. .....................................

The year. ...................................

a Partly estimated.

Discharge in aeoond-feet

Maximum

6,700 

4,990 

3,720 

3,560 

8,300 

16,700 

23,000 

33,800 

17 ,700 

5,190 

4,050

33,800

5,610 

4,410 

3,560 

3,880 

3,410 

6,700 

12,000 

39,500 

41,400 

21,800 

6,700 

5,820

41 ,400

4,990 

5,610 

4,050 

4,050 

5,610 

5,190 

21,800 

62,800 

61,000 

21,000 

6,340 

3,550

62,800

4,230 

4,230 

3,230 

3,230 

2,980 

7,480 

15 ',200 

34,000 

28,000 

9,200 

3,720 

3,380

34,000

Hinimum

3,960 

2,990 

2,920 

2,390 

2,450 

6,480 

13,800 

15,000 

4,600 

3,120 

3,120

2,390

3,340 

2,620 

1,890 

1,710 

2,740 

2,280 

6,260 

11,400 

20,600 

6,040 

3,880 

4,230

1,710

4,410 

4,050 

3,120 

2,280 

2,500 

3,260 

4,990 

14,700 

22,600 

6,560 

3,380 

2,700

2,280

2,780 

3,230 

2,620 

2,620

3,100 

4,420 

13,500 

10,200 

3,720 

2,620 

2,480

_

Mean

a4,620 

5,210 

3,850 

3,170 

2,920 

4,980 

9,270 

16,900 

25,200 

9,300 

4,060 

3,680

7,770

4,330 

* 3,520 

3,030 

2,830 

3,140 

3,030 

10,000 

25,100 

31,900 

11,500 

5,120 

4,900

9,030

4,740 

4,640 

3,550 

3,120 

3,520 

3,950 

13,200 31,100' 

40,300 

12,300 

4,930 

3,130

10,700

3,700 

3,810 

2,800 

2,830 

2,720 

4,440 

9,920 

25,000 

19,000 

6,280 

3,000 

2,890

7,220

Run- off 

in 

acre-feet

284,000 

310,000 

237,000 

195,000 

162,000 

306,000 

552,000 

1,040,000 

1,500,000 

572,000 

250,000 

219,000

5,630,000

266,000 

209,000 

186,000 

174,000 

181,000 

186,000 

595,000 

1,540,000 

1,900,000 

707,000 

315,000 

292,000

6,550,000

291,000 

276,000 

218,000 

192,000 

195,000 

243 ,000 

786,000 

1,910,000 

2,400,000 

756,000 

303,000 

186,000

7,760,000

228,000 

227,000 

172,000 

174,000 

151,000 

273,000 

590,000 

1,540,000 

1,130,000 

386,000 

184,000 

172,000

5,230,000
FEND OREILLE RIVER BASIN 81

Monthly discharge of Clark Pork at St. Regis, Mont. Continued

Month

1914-15

July. .......................;..................

1915-16

April ..........................................

July. .......................................

1916-17

1917-18

1918-19

July. ..........................................

Discharge in second-feet

Maximum

5,240 

6,120 

4,230 

3,230 

2,980 

4,420 

10,500 

14,200 

17,300 

11,400 

6,340 

4,230

17,300

4,060 

3,550 

3,550

15 ,900 

29,300 

39,000 

52,400 

48,900 

9,700 

5,240

52,400

5,460 

5,240

14,500 

59,100 

52,400 

32,600 

7,000 

5,030

59,100

4,230 

5,030 

23,800 

22,600 

7,000 

12,300 

34,000 

44,500 

48,400 

13,200 

7,240 

4,820

48,400

5,240 

4,230 

3,850

3,160 

7,000 

18. ,800 

29,300 

23 ,000 

4,620 

2,590 

1,880

29,300

Minimum

3,100 

4,230 

2,410 

2,200 

2,200 

2,620 

3,890 

7,720 

11,700 

5,900 

3,100 

2,980

t2,200

3,380 

2,980 

2,290

9,450 

13 ,800 

21,400 

10,200 

4,820 

3,890

-

4,420 

2,780

4,420 

10,800 

33,500 

7,240 

3,380 

3,550

-

3,490 

3,490 

3,160 

4,040 

3,160 

4,420 

10,500 

15,900 

14,500 

5,900 

4,820 

3,670

3,160

4,040 

2,590

1,990

2,590 

2,720 . 

6,340 

9,700 

5,240 

2,220 

1,780 

1,680

1,680

Mean

4,110 

4,950 

2,980 

2,590 

2,710 

3,190 

7,000 

10,600 

15,000 

8,650 

4,300 

3,770

5,830

3,710 

3,300 

3,100 

e2,750 

e4,300 

alO,700 

14,300 

25,600 

34,900 

25,500 

6,730 

4,800

11 ,700

5,110 

4,250 

a3,550 

e3,430 

e3,780 

a3,890 

9,530 

32,300 

41,100 

17 ,700 

4,840 

4,230

11,200

3,650 

3,930 

8,070 

10 ,500 

5,370 

6,820 

17,200 

25,800 

30,800 

7,840 

5,750 

4,060

10,800

4,330 

3,800 

3,100 

e3,000 

2,910 

3,610 

9,200 

17,400 

10,700 

2,980 

2,130 

1,830

5,420

Run- off 

in 

acre-feet

253,000 

295,000 

183,000 

159,000 

151,000 

196,000 

417,000 

652,000 

893,000 

538,000 

264,000 

224,000

4,220,000

228,000 

200,000 

191,000 

169,000 

247,000 

658 ,000 

851,000 

1,570,000 

2,080,000 

1,570,000 

414,000 

286,000

8,460,000

314,000 

253 ,000 

218,000 

211,000 

210,000 

239,000 

567,000 

1,990,000 

2,450,000 

1,090,000 

298,000 

252,000

8,090,000

224,000 

234,000 

496,000 

646,000 

298,000 

419 ,000 

1,020,000 

1,590,000 

1,830,000 

482,000 

354 ,000 

242,000

7,840,000

266,000 

226,000 

191,000 

. 184,000 

162,000 

222,000 

547,000 

1,070,000 

637 ,000 

183,000 

131 ,000 

109,000

3,930,000

t Figure previously published in error 

a Partly estimated 

e Estimated.
82 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Pork at St. Regis, Mont. Continued

Month

1919-20

May. ...........................................

July. ..........................................

1920-21

July. ..........................................

The

1921-22

April. . ........................................

Mmr

1922-23

1929

April ................................. .

May. ...........................................

July. ..........................................

The period. .. v. .............................

Discharge in second-feet

Maximum

2,590 

2,860

5,460 

9,700 

32,100 

32,100 

16,600 

4,420 

5,460

32,100

5,900 

5,240 

4,620 

4,420 

6,120 

8,700 

13 ,500 

41,800 

38,000 

13,200 

3,670 

3,490

41,800

3,850 

3,670 

7,240 

3,850 

3,010 

4,620 

10,500 

42,800 

47,200 

12,900

3,400

47,200

2,750 

3,010 

3,670 

4,230 

3,670 

7,240 

13 ,800 

30,200 

33,100 

15,900 

4,820 

3,160

33,100

1,680 

4,420 

6,340 

30,200 

23,400 

11 ,400 

2,880 

2,070

-

Minimum

1,880 

2,100

1,330 

3,160 

9,700 

15,200 

4,420 

2,720 

2,460

_

4,420 

2,720 

2,720 

2,720 

2,590 

4,620 

6,560 

10,200 

12,900 

3,850 

2,460 

2,340

2,340

2,340 

1,330 

2,460 

1,680 

1,330 

2,220 

3,670 

10,500 

13,800

2,590

1,330

2,490 

2,620 

1,680 

2,220 

1,990 

2,860 

6,230 

9,970 

15,600 

5,030 

3,160 

2,340

1,680

1,050 

1,560 

2,170 

7,240 

11,700 

3,020 

1,880 

1,780

-

 Mean

2,280 

2,570 

e2,370 

e2,290 

e2,360 

3,390 

6,860 

22,200 

24,400 

9,230 

3,580 

3,590

7,090

4,980 

4,150 

3,510 

3,480 

3,940 

6,100 

10,600 

28,200 

26,000 

6,800 

2,970 

3,030

8,670

3,020 

2,830 

3,990 

2,830 

2,410 

2,990 

6,940 

24,800 

33,200 

a7,380 

a3,350 

3,050

8,070

2,630 

2,830 

2,650 

3,200 

2,570 

3,650 

9,490 

20,800 

23 ,200 

9,490 

3,800 

2,640

7,260

1,210 

2,330 

3,390 

14,400 

18,400 

5,600 

2,350 

1,920

-

Run-off 

in 

acre-feet

140,000 

153,000 

146 ,000 

141 ,000 

136,000 

208,000 

408,000 

1,360,000 

1,450,000 

568,000 

220,000 

214,000

5,140,000

306 ,000 

247,000 

216,000 

214,000 

219,000 

375 ,000 

631,000 

1,730,000 

1,550,000 

418,000 

183,000 

180,000

6,270,000

186,000 

168,000 

245,000 

174,000 . 

134,000 

184,000 

413 ,000 

1,520,000 

1,980,000 

454,000 

206,000 

181,000

5,840,000

162,000 

168,000 

163 ,000 

197 ,000 

143 ,000 

224,000 

565,000 

1,280,000 

1,380,000 

584,000 

234,000 

157,000

5,260,000

26,400 

143 ,000 

202,000 

885,000 

1,090,000 

344,000 

144,000 

114,000

2,950,000

e Estimated.
PEND OREILLE RIVER BASIN 83

Monthly discharge of Clark Fork at St. Regis, Mont. Continued

Month

1929-30

April. . ........................................

May. ...........................................

July. ..........................................

1930-31

April ..........................................

May. ...........................................

September ......................................

1931-32

April ..........................................

May. ...........................................

1932-33

April ..........................................

The year ....................................

1933-34

July. ........................;.................

Discharge in second-feet

Maximum

2,980 

2,700 

4,120 

2,700 

4,850 

6,120 

21,800 

18 ,800 

18,800 

6,340 

.2,700 

2,980

21 ,800

3,780 

3,610 

2,840

2,570 

3,280 

5,470 

15,600 

10,800 

3,130 

2,210 

2,320

15,600

1,990 

2,210 

2,700 

2,440 

5,260 

4,660 

10,800 

32,700 

25,000 

10,800 

3,280 

2,440

32,700

2,980 

3,610 

3,610 

4,120 

5,900 

3,950 

18,000 

30,400 

50,000 

15,900 

3,280 

3,130

50,000

10,800 

10,800 

32,300 

12 ,700 

7,720 

21,900 

35,200 

29,000 

17,800 5,790' 

2,500 

3,030

35,200

Minimum

2,210 

1,990 

2,440 

1,430 

2,700 

2,840 

5,900 

11,400 

6,560 

2,440 

1,990 

1,790

1,430

2,700 

2,570 

1,900

2,210 

2,320 

2,980 

6,120 

3,130 

1,430 

1,280 

1,280

1,280

1,990 

1,430 

1,520 

1,520 

1,430 

1,990 

5,050 

9,450 

11,700 

3,280 

2,100 

1,990

1,430

2,100 

2,840

1,520 

1,200 

2,320 

3,780 

9,700 

17,000 

3,280 

2,320 

2,570

1,200

2,570 

5,050 

4,480 

6,500 

5,230 

5,790 

15,200 

16,000 

5,680 

2,440 

1,840 

1,760

1,760

Mean

2,430 

2,410 

3,010 

2,100 

3,730 

3,740 

13,100 

14,800 

11,100 

3,960 

2,280 

2,520

5,430

3,270 

2,980 

2,540 

2,360 

2,370 

2,720 

4,190 

10,900 

6,400 

2,000 

1,450 

1,680

3,580

1,990 

1,940 

2,160 

1,910 

2,130 

3,350 

V7.490 

24,700 

18,300 

5,940 

2,530 

2,170

5,980

2,520 

3,230 

2,700 

2,800 

2,380 

3,010 

6,700 

16,000 

37,000 

7,720 

2,810 

2,760

7,460

4,565 

7,047 

10,710 

8,520 

6,927 

10,130 

24,880 

21,090 

10,750 

3,675 

2,083 

1,986

9,364

Run- off 

in 

acre-feet

149,000 

143 ,000 

185,000 

129 ,000 

207,000 

230,000 

780,000 

910,000 

660 ,000 

243 ,000 

140,000 

150,000

3,930,000

201 ,000 

177,000 

156,000 

145,000 

132,000 

167,000 

249,000 

670,000 

381,000 

123,000 

89,200 

100,000

2,590,000

122,000 

115,000 

133,000 

117,000 

123,000 

206 ,000 

446,000 

1,330,000 

1,090,000 

365 ,000 

156,000 

129,000

4,330,000

155,000 

192,000 

166,000 

172,000 

132,000 

185 ,000 

399,000 

984,000 

2,200,000 

475,000 

173,000 

164,000

5,400,000

280,700 

419,300 

658,300 

523,900 

384,700 

622,800 

1,481,000 

1,297,000 

639,600 

226 ,000 

128,100 

118 ,200

6,780,000
84 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Fork at St. Regis, Mont. Continued

Month

1934-35

April ..........................................

May. ...........................................

1935-36

May. ...........................................

1936-37

May. ...........................................

The year ....................................

1937-38

May. ................................. .....

The year ....................................

Discharge In second-feet

Maximum

4,220 

4,550 

3,330 

5,250 

3,860 

4,780 

9,950 

27,000 

23,200 

9,680 

2,690 

1,620

27,000

2,250 

2,460 

2,250 

2,320 

3,420 

7,510 

24,800 

33,000 

23,600 

5,210 

2,470 

2,610

33,000

2,470 

2,470 

2,150 

1,780 

2,470 

2,540 

4,390 

16,700 

12,500 

5,320 

2,060 

2,000

16,700

1,920 

2,160 

3,300 

2,400 

2,340 

4,320 

19,100 

45,700 

42,100 

16,800 

3,510 

2,350

45,700

Minimum

2,380 

3,240 

2,390 

1,920 

2,460 

2,460 

2,920 

9,950 

8,370 

2,690 

1,620 

1,510

1,510

1,680 

1,920 

1,410 

1,150 

1,080 

2,150 

1,980 

16,700 

5,660 

2,280 

1,690 

1,690

1,080*

1,930 

1,830 

1,600 

1,310 

1,600 

2,040 

2,210 

4,490 

5,780 

2,000 

1,340 

1,180

1,180

1,680 

1,800 

1,680 

1,340 

1,260 

2,100. 

2,980 

11,000 

17 ,500 

3,800 

2,270 

1,900

1,260

Mean

2,954 

3,885 

2,942 

2,987 

2,902 

3,167 

5,972 

15,900 

16,080 

5,457 

2,057 

1,558

5,494

1,942 

2,230 

1,922 

1,935 

1,592 

3,292 

11,920 

22 ,440 

13,690 

3,359 

1,933 

2,123

5,701

2,148 

2,133 

1,909 

1,474 

2,090 

2,199 

3,333 

12,260 

10,150 

3,041 

1,703 

1,351

3,656

1,854 

1,946 

2,217 

2,060 

1,980 

2,974 

8,770 

20,540 

24,030 

9,119 

2,730 

2,140

6,708

Run- off 

in 

acre-feet

181,600 

231,200 

180,900 

183,600 

161,200. 

194,800 

355,400 

977,400 

957,000 

335,500 

126,500 

92,730

3,988,000

119,400 

132,700 

118,200 

119,000 

91,560 

202 ,500 

709,400 

1,380,000 

814,600 

206,500 

118,800 

196,300

4,139,000

132,100 

126,900 

117,400 

90,640 

116 ,100 

135,200 

198,300 

754,000 

604,000 

187 ,000 

104,700 

80,390

2,647,000

114,000 

115,800 

136,300 

126,600 

110,000 

182,900 

521 ,900 

1,263,000 

1,430,000 

560,700 

167,800 

127,300

4,856,000
PEND OREILLE RIVER BASIN 85

Yearly discharge of Clark Fork at St. Regia, Mont.

Year

1913. ............

1914. ............

1915. ............

1916. ............

1917. ............

1918. ............

1919.

1920. ............

1921. ............

1922............ .

1923.............

1931.............

1934.............

1936 .............

1937 .............

1938 .............

Year ending Sept. 30

lie an discharge 

in second-feet

7,770 

9,030 

10,700 

7,220 

5,830

11,700 

11,200 

10,800 

5,420 

7,090

8,670 

8,070 

7,260 

5,430 

3,580

5,980 

7,460 

9,364 

5,494 

5,701

3,656 

6,708

11,700 

7,461 

3,580

ft Run- off in 

acre-feet

5,630,000 

6,550,000 

7,760,000 

5,230,000 

4,220,000

8,460,000 

8,090,000 

7,840,000 

3,930,000 

5,140,000

6,270,000 

5,840,000 

5,260,000 

3,930,000 

2,590,000

4,330,000 

5,400,000 

6,780,000 

3 ,988 ,000 

4,139,000

2,647,000 

4,856,000

8,464,000 

5,404,000 

2,590,000

Calendar year

Mean discharge 

in second-feet

7,540 

9,190 

10,500 

7,360 

5,670

11,900 

11,400 

10,500 

5,090 

7,540

8,420 

7,930

5,500 

3,350

6,160 

8,620 

8,308 

5,186 

5,709

3,642

11,900 

7,476 

3,350

Run- off in 

acre-feet

5,460,000 

6,680,000 

7,600,000 

5,330,000 

4,110,000

8,630,000 

8,260,000 

7,560,000 

3,680,000 

5,470,000

6,100,000 

5,740,000

3,980,000 

2,430,0'"0

4,480,000 

6,240,000 

6,015,000 

3,754,000 

4,145,000

2,636,000

8,630,000 

5,415,000 

2,426,000

Clark Pork near Plains, Mont.

Location.- Water-stage recorder, lat. 47°26', long. 114051' on lot 7, SWj seo. 1, T. 19 

N.", R. 26 W., 2 miles upstream from Plains and 6 miles downstream from Flathead River.

Drainage area.- 19,900 square miles.

Records available.- October 1910 to September 1938.

Extremes.- Maximum discharge, 126,000 second-feet May 28, 1928 (gage height, 18.4 feet); 

minimum, 3,200 second-feet Feb. 8, 1936.

Remarks.- Many diversions above station for irrigation. Flow partly regulated by natural 

storage in Plathead Lake.

Monthly discharge of Clark Pork near Plains, Mont.

Month

1910-11

1911-12

May

Discharge in second-feet

Maximum

9,760 

14,700 

13,1OO 

8,720 

6,970 

10,900 

11,700 

36,600

46,600 

19 , 700 

10,100

10,500 

8,400 

8,400

6,470 

8,100 

22,700 

73,600 

74,500 

51,000 

18,600 

10,900

Minimum

9,400 

9,400 

9,060 

6,970 

6,020 

6,240 

10,900 

28,200

18,000 

9,400 

8,720

8,100 

6,470 

6,240

5,620 

5,290 

7,530 

23,300 

50,100 

19,200 

9,760 

9,400

Mean

9,490 

12,400 

10,500 

8,010 

6,440 

9,070 

11,200 

31,900

30,600 

14,400 

9,570

9,520 

7,770 

7,090 

5,500 

5,970 

5,860 

15,500 

49,300 

65,200 

32,400 

13,100 

10,100

Run- off 

in 

acre-feet

75,300 

 738,000 

646,000 

493,000 

358,000 

496,000 

171,000 

379,000

1,390,000 

885,000 

569,000

585,000 

462,000 

112,000 

240,000 

201,000 

360,000 

922,000 

3,030,000 

3,880,000 

1,990,000 

806,000 

601,000
86 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Ferk near Plains, Mont. Continued

Honth

1912-13

April. . ........................................

Hay. ...........................................

1913-14

April. . ........................................

May. ...........................................

1914-15

Hay. ...........................................

July. ..........................................

1915-16

September. .....................................

1917

July. ..........................................

1917-18

Discharge in second-feet

Maximum

9,400 

9,760

8,400

7,810 

34,200 

106,000 

115,000 

69,200 

23,100 

11,500

115,000

9,030 

9,350 

9,030 

7,600 

8,720 

10,700 

27,800 

67,000 

62,300 

35,100 

14,100 

8,720

67,000

11,900 

16,600 

11,900 

9,100 

8,050 

7,600 

24,400 

35,900 

37,400 

32,800 

18,800 

10,700

37,400

10,400 

8,720 

9,030 

8,240 

17,700 

67,400 

111,000 

39,000 

17,200

102,000 

106,000 

85,400 

27,100 

11,500

-

9,210 

8,400 

29,600 

29,600 

16,100 

18,100 

36,600 

69,100 

99,500 

57,100 

18,600 

13,200

99,500

Minimum

8,400 

8,400

6,240 

6,470 

6,240 

7,810 

29,700 

71,500 

23,800 

12,300 

9,350

8,720 

8,720 

6,850 

6,620 

5,970 

7,600 

8,420 

27,100 

36,700 

14,600 

8,720 

8,420

5,970

8,130 

11,100 

7,860 

7,200 

7,090 

6,850 

7,860 

26,400 

32,800 

19,400 

10,400 

9,350

6,850

8,720 

8,130 

7,700 

5,970 

10,700 

42,200 

49,500 

16,000 

13,300

36,700 

79,600 

27,800 

11,500 

9,030

-

7,620 

6,540 

5,850 

12,800 

10,500 

10,100 

18,100 

39,800 

47,200 

19,600 

13,200 

8,800

5,850

He an

8,840 

9,040 

7,500 

7,360 

7,940 

7,030 

18,800 

53,900 

98,200 

42, 800 

17,000 

10,100

24,100

8,740 

9,070 

8,040 

7,410 

7,360 

8,590 

16,900 

48,900 

49,200 

23,800 

10,600 

8,480

17,300

9,830 

14,200 

9,510 

7,970 

7,350 

7,180 

15,500 

31,200 

35,400 

26,500 

14,400 

9,960

15,800

9,360 

8,500 

8,660 

7,020 

15,000 

52,100 

80,700 

24,800 

15,300

73,600 

91,900 

55,300 

17,700 

9,910

-

8,190 

7,390 

11,600 

21,300 

13,000- 

12,600 

26,100 

56,600 

73,300 

32,600 

15,700 

10,300

24,100.

Run- off

acre-feet

544,000 

538,000 

461,000 

453,000 

441,000 

432,000 

1,120,000 

3,310,000 

5,840,000 

2,630,000 

1,050,000 

601,000

17,400,000

537,000 

540,000 

494,000 

456,000 

409,000 

528,000 

1,010,000 

3,010,000 

2,930,000 

1,460,000 

652,000 

505,000

12,500,000

604,000 

845,000 

585,000 

490,000 

408,000 

441,000 

922,000 

1,920,000 

2,110,000 

1,630,000 

885,000 

593,000

11,400,000

576,000 

509,000 

532,000 

237,000 

744,000 

3,200,000 

4,800,000 

1,520,000 

910,000

2,920,000 

5,470,000 

3,400,000 

1,090,000 

590,000

13,500,000

504,000 

440,000 

713,000 

1,310,000 

722,000 

775,000 

1,550,000 

3,480,000 

4,360,000 

2,000,000 

965,000 

613,000

17,400,000
PEND OREILLE RIVER BASIN 87

Monthly discharge of Clark Pork near Plains, Mont. Continued

Month

1918-19

April. .........................................

July. ..........................................

1919-20

April. .........................................

May............................................

September. .....................................

1920-21

April. . ........................................

The

1921-22

May. ...........................................

1922-23

Discharge in second-feet

Maximum

9,210 

8,800 

7,620

. 6,540 

10,100 

32,600 

73,800 

71,000 

28,900 

11,400 

6,890

73,800

5,200 

5,520 

8,200 

17,100 

58,000 

72,900 

56,200 

19,600 

10,500

12,300 

10,600 

9,720 

8,910 

9,720 

14,500 

28,300 

99,000 

99,000 

52,500 

17,400 

8,910

99,000

7,560 

8,320 

11,000 

8,800 

6,360 

7,190 

16,200 

90,500 

113,000 

47,500 

15,800 

9,880

113,000

7,280 

6,800 

6,700 

7,450 

6,810 

10,900 

23,200 

77,200 

94,300 

58,300 

18,800 

10,500

94,300

Minimum

8,400 

6,540 

6,190

5,850 

5,520 

10,500 

29,600 

30,400 

11,800 

6,890 

5,200

5,200

4,890 

4,890 

5,200 

6,540 

17,600 

47,200 

20,700 

10,500 

8,800

9,720 

8,910 

7,740 

7,740 

7,010 

9,720 

13,200 

25,800 

55,500 

17,900 

9,310 

7,010

7,010

6,320 

6,160 

6,190 

5,520 

4,890 

5,200 

6,840 

16,400 

50,400 

16,500 

9,880 

7,280

4,890

6,340 

6,340 

4,900 

5,950 

5,350 

5,980 

10,300 

24,300 

61,400 

18,800 

10,500 

6,800

4,900

Mean

8,660 

7,970 

6,870 

e6,180 

6,320 

6,650 

15,200 

42,600 

46,700 

18,400 

9,170 

6,020

15,100

5,100 

5,200 

6,590 

10,700 

43,100 

61,700 

37,700 

14,000 

9,590

11,200 

9,760 

8,650 

8,390 

8,510 

11,800 

20,700 

60,600 

80,800 

31,500 

12,200 

8,000

22,700

6,810 

6,790 

8,140 

6,980 

5,640 

6,220 

10,600 

46,700 

86,900 

28,100 

12,400 

8,710

19,500

6,970 

6,560 

5,870 

6,790 

6,070 

6,720 

14,600 

49,900 

73,300 

34,800 

13,800 

8,260

19,500

Run-off 

in 

acre-feet

532,000 

474,000 

422,000 

380,000 

351,000 

409,000 

904,000 

2,620,000 

2,780,000 

1,130,000 

564,000 

358,000

10,900,000

314,000 

309,000 

301,000 

637,000 

2,650,000 

3,670,000 

2,320,000 

861,000 

571,000

689,000 

581,000 

532,000 

516,000 

473,000 

726,000 

1,230,000 

3,730,000 

4,810,000 

1,940,000 

750,000 

476,000

16,500,000

419,000 

404,000 

501,000 

429,000 

313,000 

382,000 

631,000 

2,870,000 

5,170,000 

1,730,000 

762,000 

518,000

14,100,000

429,000 

390,000 

361,000 

418,000 

337,000 

413,000 

869,000 

3,070,000 

4,360,000 

2,140,000 

848,000 

492,000

14,100,000

e Estimated.
88 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Pork near Plains, Mont. --Continued

Month

1923-24

April. ............................

May. .................................

July. .............................

1924-25

April 7-30. ...................................

May ...........................................

July. .........................................

1925-26

July. ..........................................

1926-27

April ..........................................

1927-28

April . ....:....................................

May. ...........................................

Discharge In second-feet

Maximum

7,450 

7,280 

6,960

8,020 

7,040 

19,000 

79,200 

58,300 

33,400 

14,000 

7,820

79,200

7,410 

9,150 

53,500 

104,000 

89,400 

62,200 

18,200 

11,400

9,520

7,010 

7,740 

9,310 

39,600 

46,800 

31,000 

16,900

46,800

14,000 

13,600 

16,400

11,200 

10,300 

9,720 

40,500 

77,600 

117,000 

89,400 

25,800 

15,500

117,000

16,900 

29,600

43,800 

126,000 

111,000 

63,800 

26,400

126,000

Minimum

7,120 

6,800 

5,650

6,000 

5,780 

5,780 

19,800 

36,200 

13,700 

7,820 

5,950

-

6,000 

5,750 

21,600 

44,100 

57,000 

18,200 

11,400 

9,720

7,740

6,000 

6,000 

6,160 

8,510 

32,400 

16,900 

7,740

6,000

8,200 

11,000 

10,800 

8,500 

7,740 

8,510 

10,100 

34,700 

74,400 

26,400 

13,600 

13,200

7,740

13,200 

15,900

16,900 

44,100 

58,600 

27,000 

14,000

_

Mean

7,290 

6,930 

6,360 

5,810 

6,760 

6,530 

10,800 

55,900 

46,600 

21,300 

10,400 

6,640

tie, ooo

6,750 

6,610 

42,600 

75,700 

69,400 

32,600 

13,700 

10,900

8,420 

7,250 

7,000 

6,360 

6,820 

7,750 

19,300 

39,700 

22,800 

12,100 

6,500 

7,300

12,600

11,100 

12,200 

14,300 

9,580 

8,420 

9,170 

13,800 

55,200 

101,000 

52,800 

18,200 

14,300

26,700

15,100 

21,200 

l r ,900 

el^,500 

11,200 

14,000 

20,700 

89,800 

74,000 

44,400 

18,900

29,400

Run-off 

in 

acre- feet

448,000 

412,000 

391,000 

357,000 

389,000 

402,000 

643,000 

3,440,000 

2,770,000 

1,310,000 

640,000 

395,000

11,600,000

402,000 

181,000 

2,030,000 

4,650,000 

4,130,000 

2,000,000 

842,000 

649,000

518,000 

431,000 

430,000 

391,000 

379,000 

777,000 

1,150,000 

2,440,000 

1,360,000 

744,000 

400,000 

434,000

9,150,000

682,000 

726,000 

879,000 

589,000 

467,000 

564,000 

321,000 

3,390,000 

6,010,000 

3,520,000 

1,120,000 

851,000

19,300,000

928,000 

1,260,000 

1,110,000 

830,000 

644,000 

861,000 

1,230,000 

5,520,000 

4,400,000 

2,730,000 

1,160,000 

649,000

21,300,000

t Figure previously published In error, 

e Estimated.
PEND OEEILLE RIVER BASIN 89

Monthly discharge of Clark Pork near Plains, Mont. Continued

Month

1928-29

March. .........................................

July. ............................... ...

1929-30

July. ..........................................

1930-31

May. ...........................................

1931-32

July. ..........................................

1932-33

Discharge in second-feet

Maximum

9,580 

9,120 

8,300 

6,470 

5,560 

8,230 

14,500 

64,400 

66,400 

39,800 

13,200 

6,640

66,400

5,690 

5,180 

6,140 

5,180 

7,200 

8,230 

43,000 

46,400 

47,300 

27,400 

11,000 

6,820

47,300

7,400 

7,810 

6,640 

5,420 

5,180 

6,470 

13,000 

47,300 

41,400 

20,100 

8,670 

5,300

47,300

4,960 

4,960 

5,420 

4,860 

7,400 

10,700 

28,700 

83,600 

71,200 

51,600 

16,100

8,900

83,600

6,650 

9,650 

11,100

7,250 

31,000 

66,900 

119,000 

75,800 

22,100 

10,600

119,000

Minimum

8,670 

8,230 

6,640 

4,460 

4,370 

5,690 

6,640 

15,000 

40,600 

13,500 

6,820 

5,420

4,370

5,180 

4,460 

4,460 

3,860 

4,550 

5,070 

7,810 

38,200 

28,000 

11,500 

6,470 

5,840

3,860

6,300 

6,470 

4,750 

4,860 

4,960 

5,070 

6,300 

14,000 

21,400 

8,900 

4,370 

4,200

4,200

4,550 

4,460 

4,460 

4,050 

4,460 

5,420 

10,700 

28,700 

53,400 

17,200 

8,670 

6,470

4,050

5,260 

6,650

5,850 

6,850 

31,800 

72,800 

22,800 

10,600 

8,650

5,260

Mean

9,240 

8,560 

7,380 

5,480 

4,970 

6,490 

8,420 

34, 700 

57,300 

24,300 

9,250 

5,870

15,200

5,330 

4,820 

5,160 

4,340 

6,040 

5,780 

22,800 

41,400 

39,100 

18,100 

8,460 

6,330

14,000

6,930 

6,830 

5,920 

5,190 

5,060 

5,550 

9,200 

35,100 

32,400 

13,300 

6,150 

4,770

11,400

4,760 

4,760 

4,930 

4,540 

5,290 

8,300 

19,500 

59,300 

64,000 

31,200 

11,800 

7,480

18,800

6,020 

8,000 

8,660 

7,390 

6,050 

6,420 

11,300 

42, £00 

99,800 

45,200 

14,900 

9,320

22,200

Run- off 

in 

acre-feet

568,000 

509,000 

454,000 

337,000 

276,000 

399,000 

501,000 

2,130,000 

3,410,000 

1,490,000 

569,000 

349,000

11,000,000

328,000 

287,000 

317,000 

267,000 

335,000 

355,000 

1,360,000 

2,550,000 

2,330,000 

1,110,000 

520,000 

377,000

10,100,000

426,000 

406,000 

364,000 

319,000 

281,000 

341,000 

547,000 

2,160,000 

1,930,000 

818,000 

378,000 

284,000

8,250,000

293,000 

283,000 

303,000 

279,000 

304,000 

510,000 

1,160,000 

3,650,000 

3,810,000 

1,920,000 

726,000 

445,000

13,700,000

370,000 

476,000 

532,000 

454,000 

336,000 

395,000 

672,000 

2,620,000 

5,940,000 

2,780,000 

916,000 

555,000

16,000,000
90 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Clark Pork near Plains, Mont. Continued

Month

1933-34

April. .........................................

Mmr

July. ..........................................

The year. ...................................

1934-35

April. .........................................

1935-36

April ..........................................

May . .. .......... ..... .... . . ..

July. ..........................................

1936-37

May . ............ .. .......

July. ..........................................

The year. ...................................

1937-38

April ..........................................

Discharge in second-feet

Maximum

26,800 

18,400 

33,300 

74,800 

76,800 

64,000 

27,500 

11,100 

6,250

76,800

7,450 

10,600 

10,000 

10,000 

8,400 

8,990 

20,400 

66,400 

70,200 

44,900 

16,900 

8,010

70,200

5,760 

5,570 

4,720 

4,440 

6,500 

18,100 

44,900 

80,800 

73,000 

26,900 

9,990 

6,400

80,800

5,500 

4,980 

4,460 

3,590 

4,630 

4,980 

9,020 

50,000 

48,200 

35, 400 

12,000 

6,780

50,000

5,420 

5,770 

6,870 

6,320 

5,800 

8,200 

33,000 

86,900 

85,800 

45,600 

9,800 

12,500

86,900

Minimum

8,250 

18,400

28,200 

64, 000 

28,900 

11,100 

7,050 

5,450

5,450

5,450 

7,250 

7,050

7,630 

7,250 

7,630 

21,000 

44,900 

17,500 

8,200 

5,570

5,450

5,200 

4,330 

3,770 

3,500 

3,200 

4,800 

4,630 

42,500 

27,500 

9,990 

6,040 

5,150

3,200

4,800 

4,130 

3,590

4,460 

4,630 

9,600 

36,900 

12,500 

6,780 

4,460

_

4,750 

4,800 

4,750 

4,500 

4,500 

4,920 

6,870 

35,200 

49,800 

8,600 

4,920 

5,600

4,500

Mean

10,160 

20,630 

21,430 

22,320 

16,390 

17,850 

47,830 

69,540 

46,400 

17,920 

9,031 

5,718

25,460

6,031 

9,337 

8,665 

7,635 

8,053 

7,890 

11,460 

41,110 

61,830 

29,530 

11,500 

6,533

17,490

5,341 

4,872 

4,224 

4,083 

4,231 

6,923 

20,040 

63,300 

49,720 

16,520 

7,710 

5,734

16,080

5,010 

4,588 

4,075 

3,344 

3,940 

4,636 

6,112 

32,630 

44,430 

21,950 

9,092 

5,380

12,130

5,014 

5,218 

5,825 

5,769 

5,354 

6,289 

16,780 

48,050 

65,810 

22,550 

6,606 

9,662

16,920

Run-off 

in 

acre-feet

625,000 

1,228,000 

1,318,000 

1,372,000 

910,200 

1,098,000 

2,846,000 

4,276,000 

2,761,000 

1,102,000 

555,300 

340,300

18,430,000

370,800 

555,600 

532,800 

469,500 

447,200 

485,100 

682,000 

2,528,000 

3,679,000 

1,815,000 

707,100 

388,700

12,660,000

328,400 

289,900 

259,700 

251,000 

243,400 

425,700 

1,192,000 

3,892,000 

2,959,000 

1,016,000 

474,100 

341,200

11,670,000

308,100 

273,000 

250,600 

205,600 

218,800 

285,100 

363,700 

2,006,000 

2,644,000 

1,359,000 

559,000 

320,100

8,784,000

308,300 

310,500 

358,200 

354,700 

297,300 

386,700 

998,200 

2,955,000 

3,916,000 

1,387,000 

406,200 

574,900

12,250,000
PEND OREILLE RIVER BASIN 91

Yearly discharge of Clark Pork near Plains, Mont.

Year

1914

1 Q1 *\

T Cn (5

1919

1 Qo'X

1931 .............

1938 .............

Year ending September 30

Mean discharge 

in second-feet

24,100 

17,300 

15,300 

24,100 

15,100

22,700 

19,500 

19,500 

16,000 

12,600

26,700 

29,400 

15,200 

14,000 

11,400

18,800 

22,200 

25,460 

17,490 

16,080

12,130 

16,920

29,400 

18,750 

11,400

Run-off in 

acre-feet

17,400,000 

12,500,000 

11,400,000 

17,400,000 

10,900,000

16,500,000 

14,100,000 

14,100,000 

11,600,000 

9,150,000

19,300,000 

21,300,000 

11,000,000 

10,100,000 

8,250,000

13,700,000 

16,000,000 

18,430,000 

12,660,000 

11,670,000

8,784,000 

12,250,000

21,300,000 

13,570,000 

8,250,000

Calendar year

Mean discharge 

in second- feet

24,100 

17,900 

15,200 

23,800

22,100 

19,300 

19,600

13,900

28,100 

26,900 

14,400 

14,400 

11,000

19,500 

24,600 

23,090 

16,690 

16,010

12,330

28,120 

19,100 

10,960

Run-off in 

acre-feet

17,400,000 

13,000,000 

11,000,000 

17,200,000

16,000,000 

14,000,000 

14,200,000

10,100,000

20,400,000 

19,600,000 

10,400,000 

10,400,000 

7,940,000

14,200,000 

17,800,000 

16,720,000 

12,080,000 

11,630,000

8,929,000

20,400,000 

13, .840, 000 

7,937,000

Clark Pork near Heron, Mont.

Location.- Water-stage recorder, lat. 48°04', long. 115°59', in sec. 28, T. 27 H., R. 34

W., 6OO feet upstream from Dead Horse Creek and li miles northwest of Heron. Prior

to Jan. 2, 1931, at datum 10 feet higher. 

Drainage area.- 21,800 square miles. 

Records available.- September 1928 to September 1938. 

Extremes.- Maximum discharge, 137,000 second-feet June 17, 1933 (gage height, 46.62 feet)j

minimum, 620 second-feet (during period of extreme regulation) Dec. 23, 1935 (gage

height, 7.59 feet).

Maximum stage known, 59.1 feet, present datum, June 1894. 

Remarks.- Power-plant operation at Thompson Palls causes diurnal fluctuation during low

periods. Considerable water diverted from tributaries upstream for irrigation.

Monthly discharge of Clark Pork near Heron, Mont.

Month

1928

1928-29

 i 

Discharge in second-feet

Maximum

10,600

11,100 

11,300 

9,130

9,340 

72,100

42,600 

14,700 

7,900

72,100

Minimum

8,920

8,100 

7,900 

5,540

6,580 

81,300 

45,000 

15,200 

7,700 

4,800

-

Mean

9,750

9,450 

9,010 

7,180 

5,900 

5,390 

' 7,450 

10,900 

40,000 

60 ,700 

26,000 

10,600 

6,530

16,600

Run-off 

in 

acre-feet

193,000

581,000 

536,000 

441 ,000 

363,000 

299,000 

458,000 

649 ,000 

2,460,000 

3,610,000 

1,600,000 

652,000 

389,000

12,000,000
92 SURFACE WATERS OF UPPER COLUMfilA RIVER BASIN, 1898-1938

Monthly discharge of Clark Fork near Heron, Mont. Continued

Month

1929-30

September. .....................................

1930-31

March. .........................................

1931-32

April. .........................................

Mav. ...........................

July. ..........................................

1932-33

May. ...........................................

September. .....................................

1933-34

May. ...........................................

Discharge in second-feet

Maximum

6,880 

7,060 

7,420 

6,880 

12,200 

11,300 

48,000 

50,600 

50,600 

29,900 

12,900 

7,720

50,600

8,660 

8,470 

8,090 

6,340 

6,500 

8,850 

17 ,400 

51,000 

45,700 

21,600 

9,650 

7,180

51,000

7,600 

7,790 

6,200

14,400 

14,100 

34,600 

94,900 

78,600 

56 ,800 

19,600 

9,780

94,900

7,250 

10,800 

13 ,000 

10,400 

8,180 

9,750 

41 ,100 

78,000 

137 ,000 

84,400 

24,700 

11,400

137,000

22,600 

27,800 

71,700 

37,200 

22,100 

44,700 

87,400 

85 ,300 

70 ,000 

31 ,400 

12,700 

8,180

87 ,400

Minimum

5,260 

5,000 

3,640 

3,180

5,410 

11,800 

41,300 

30,900 

13,400 

7,720 

6,180

3,180

5,710 

6,340 

5,120 

5,560 

6,020 

6,020 

8,470 

19,100 

22,800 

9,650 

5,120 

4,060

4,060

4,680 

4,140 

4,140

8,560 

15,100 

35,300 

59,200 

20,200 

9,780 

7,420

-

6,710 

7,070

6,540

6,030 

9,950 

39,700 

83,600 

25,300 

11 ,900 

9,150

-

7,800 

18,500 

17,500 

22,400 

16,500 

16,500 

35,500 

70,500 

32,400 

13,600 

7,070 

5,550

5,550

Mean

6,210 

5,640 

.6,040 

4,720 

7,430 

7,550 

27,500 

45,600 

42,600 

20,100 

9,860 

6,990

15,900

7,610 

7,560 

6,760 

5,930 

6,190 

7,260 

12,300 

39,700 

34,600 

14,700 

7,480 

5,740

13,000

5,680 

5,450 

5,570 

5,560 

6,330 

11 ,500 

25,100 

69,200 

70,800 

35 ,600 

13,500 

8,390

21,900

6,950 

8,860 

9,880 

8,880 

6,890 

7,990 

16,500 

49,200 

114,000 

49,700 

16,500 

10,100

25,500

11 ,320 

21 ,830 

30,350 

28,020 

20,190 

23,010 

59,140 

77,100 

50,290 

20,590 

9,896 

6,740

29,900

Run-off

acre-feet

382,000 

336,000 

371,000 

290,000 

413,000 

464,000 

1,640,000 

2,800,000 

2,530,000 

1,240,000 

606,000 

416,000

11,500,000

468,000 

450,000 

416,000 

365,000 

344,000 

446,000 

732,000 

2,440,000 

8,060,000 

904,000 

460,000 

342,000

9,430,000

349,000' 

324,000 

342,000 

342,000 

364,000 

707,000 

1,490,000 

4,250,000 

4,210,000 

2,190,000 

830,000 

499,000

15,900,000

427,000- 

527,000 

608,000 

546,000 

383,000 

491,000 

982,000 

3,030,000 

6,780,000 

3,060,000 

1,010,000 

601,000

18,400,000

695,900 

1,299,000 

1,866,000 

1,723,000 

1,121,000 

1,415,000 

3,519,000 

4,741,000 

2,992,000 

1,266,000 

608,500 

401,100

21,650,000
PEND OREILLE RIVER BASIN 93

Monthly discharge of Clark Pork near Heron, Mont. Continued

Month

1934-35

April. . ........................................

July. ..........................................

1935-36

May. ...........................................

1936-37

May ............................................

July. ...........................................

The year ....................................

1937-38

July. ..........................................

Discharge in second-feet

Maximum

10,800 

12,300 

11,600 

11,000 

10 ,800 

11 ,200 

27,200 

74,200 

77,600 

48,000 

18,800 

10,400

77,600

6,350

5,990 

5,990 

5,640 

8,750 

10,200 

55,300 

89,600 

76,700 

28,500 

11,200 

7,070

89,600

5,870 

5,390 

5,710

5,870 

IS, 700 

54,900 

53,000 

38,300 

13,400 

7,250

54,900

5,870 

6,540 

7,800 

7,610 

7,070 

11,000 

42,200 

94,900 

95 ,800 

51,800 

10,600 

13,400

95,800

Minimum

5,710 

8,370 

8,370 

6,030 

8,560 

6,540 

9,550 

29,800 

48,400 

19,000 

10,000 

5,710

5,710

5,470 

4,790 

1,110 

4,200 

1,400 

4,450 

4,450 

51,400 

29,100 

11,600 

6,710 

5,640

1,110

5,240 

4,420 

3,250 

2,970

4,490 

5,240 

12,700 

39,700 

13,400 

7,250 

5,240

2,970

5,090 

5,240 

5,240 

6,000 

3,460 

6,030 

8,750 

4S,200 

55,600 

11,500 

5,870 

6,710

3,460

He an

7,038 

11 ,070 

10,110 

8,788 

9,740 

9,580 

15,640 

48,610 

66,520 

32,110 

13,500 

7,473

20,040

5,946 

5,516 

4,845 

4,944 

4,217 

7,270 

26,130 

69,940 

53,160 

18,450 

8,574 

6,249

17,960

5,466 

5,008 

4,732 

3,527 

4,232 

5,122 

8,397 

38,000 

47,610 

23,840 

9,969 

6,001

13,530

5,511 

5,871 

6,644 

6,808 

6,111 

8,205 

22,630 

55,160 

71,950 

25,770 

7,824 

9,980

19,390

Run-off 

in 

acre-feet

432,800 

658,900 

621 ,900 

540,400 

540,900 

589,000 

930,400 

2,989,000 

3,958,000 

1,974,000 

830,300 

444,700

14,510,000

365,600 

328,200 

297,900 

304,000 

242,600 

447,000 

1,555,000 

4,300,000 

3,163,000 

1,134,000 

527,200 

371,800

13,040,000

336 ,100 

298,000 

290,900 

216,900 

235,000 

314,900 

499 ,700 

2,336,000 

2,833,000 

1,466,000 

613,000 

357,100

9,797,000

338,900 

349,300 

408,500 

418,600 

339 ,400 

504,500 

1,347,000 

3,392,000 

4,281,000 

1,585,000 

481,100 

593,800

14,040,000

527283 O - 43 - 7
94 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Yearly discharge of Clark Pork near Heron, Mont.

Year

1929.............

1930.............

1951. ............

1932. ............

1954. ............

1935....

1936

1957. . .

1958. . .

Highest...

Year ending September 30

Mean discharge 

in second-feet

16,600 

15,900 

13,000 

21,900 

25,500

29,900 

20,040 

17,960 

15,550 

19,590

29,900 

19,370 

13,000

Run-off in 

acre-feet

12,000,000 

11,500,000 

9,430,000 

i5, 900 ,000 

18,400,000

21,650,000 

14,510,000 

15,040,000 

9,797,000 

14,040,000

21,650,000 

14,030,000 

9,430,000

Calendar year

Mean discharge 

in second-feet

16,000 

16,200 

12,600 

22,600 

28,600

26,930 

19,050 

17,870 

15,770

28,600 

19,290 

12,600

Run-off in 

acre-feet

11,600,000 

11,700,000 

9,110,000 

16,400,000 

20,700,000

19,500,000 

-13,790,000 

12,970,000 

9,968,000

20,700,000 

15,970,000 

9,110,000

Racetrack Creek near Anaconda, Kont.

Location.- Chain gage, lat. 46°17', long. 112°57' In sec. 15, T. 6 N., R. 11 W., 3 miles

upstream from Racetrack range station, and 10 miles north of Anaconda. 

Drainage area.- 58 square miles.. 

Records available.- July 1911 to November 1912, 

Remarks.- Diversion above station for mining.

Monthly discharge of Racetrack Creek near Anaconda, Mont.

Month

1911

1912

May 5-51 .......................................

July. ..........................................

Discharge in second-feet

Maximum

108 

55 

58 

56

-

25 

24 

19 

209 

515 

408 

111 

111 

144 

152

Minimum

55 

59

30 

24

-

19 

16 

16 

22 

208 

85 

75 

75 

88 

111

Mean

75.9 

45.9 

53.^ 

29.6

-

20.8 

18.2 

16.7 

101 

571 

180 

96.3 

90.3 

131 

120

Run-off 

in 

acre-feet

3,080 

2,820 

1,990 

1,820

9,710

556 

1,050 

565 

5,410 

22,100 

11,100 

5,920 

5,370 

8,060 

2,140

Middle Pork of Rock Creek near Philipsburg, Mont.

Location... Wire-weight gage, lat. 46°11', long. 115°50', in NEi sec. 17, T. 5 N., R. 15 

W., three-quarters of a mile upstream from East Pork, 2j miles upstream from West 

Pork, and 15 miles southwest of Ehilipsburg.

Records available.- September 1957 to September 1958.

Extremes.- Maximum discharge observed, 980 second-feet May 29, 1958 (gage height, 5.96 

feet); minimum observed, 17 second-feet Jan, 29, 1958 (discharge measurement).

Remarks.- Several small diversions above station for irrigation.

Monthly discharge of Middle Pork of Rock Creek near Fhillpsburg, Mont.

Month

1957

1957-58

Discharge in second-feet

Maximum

45

41 

40

29 

186 

920 

657 

492 

86 

54

Minimum

40

34 

35

22 

21 

150 

296 

92 

44 

52

Mean

40.9

37.9 

36.3 

34.8 

25 

26.3 

57.7 

339 

450 

216 

64.5 

40.8

Run-off 

in 

acre-feet

811

2,530 

2,160 

2,140 

744 

940 

3,430 

20,840 

26 ,780 

13 ,270 

5,970 

2,430
PEND OREILLE RIVER BASIN 95

Rock Creek near Quigley, Mont.

Location.- Wire-weight gage, lat. 46°35', long. 113°4l', In Swi sec. 36, T. 10 H., R. 17 

W. (unsurveyed), at highway bridge a quarter .of a mile upstream front Ranch Creek and 

2-^ miles south of. .(Julgley.

Drainage area.- 772 square miles.

Records available.- October 1911 to November 1912, May 1922 to September 1927.

Extremes.- Maximum discharge observed, 6,620 second-feet June 5, 1922 (gage height, 6.32 

feet; minimum observed, 115 second-feet Dec. 17, 1924 (gage height, 1.00 foot).

Remarks.- Ho large diversions above station.

Monthly discharge of Rook Creek near Qulgley,. Mont.

Month

1911-12

1922

1922-23

May...........................

1923-24

September. ....................

The year ...................

1924-25

April

May...........................

e Estimated.

Discharge In second-feet

Maximum

425 

280

280 

2,440 

655 

450 

320 

370

3,720 

5,170 

1,010 

358 

265

197 

237 

182

615 

2, -760 

2,520 

1,200 

407 

246

2,760

257 

252

590 

2,700 

1,070 

409 

237 

157

2,700

240 

551

523 

1,080 

3,540 

2,520 

1,190 

288 

224

-

Minimum

250 

250

180 

555 

455 

520 

280 

280

415 

1,170 

368 

252 

192

187 

184

275 

422 

1,200 

595 

246 

172

-

197 

197

224 

641 

418 

240 

150 

158

-

182 

115

148 

285

810 

997 

288 

194 

176

-

Mean

322 

260 

e200 

220 

1,160 

517 

386 

305 

313

1,630 

5,280 

567 

509 

226

192 

214 

177 

e!80 

e!70 

e250 

565 

1,280 

1,690 

692 

526 

199

478

254 

211 

e!90 

e!70 

e215 

e250 

515 

1,570 

741 

558 

204 

146

585

201 

172 

186 

179 

204 

655 

2, -230 

1,660 

499 

243 

193

-

Per 

square 

mile

0.417 

.557 

.259 

.285 

1.50 

.670 

.500 

.595 

.405

2.11 

4.25 

.734 

.400 

.293

.249 

.277 

.229 

.235 

.220 

.298 

.475 

1.66 

2.19 

.896 

.422 

,258

.619

.303 

.273 

.246 

.220 

.278 

.324 

.405 

2.03 

.960 

.438 

.264 

.189

.496

.260 

.223 

.241 

.252 

.264 

.848 

2.89 

2.15 

.646 

.515 

.250

-

Run- off

Inches

0,48 

.28 

.28 

.52 

1.75 

.77 

.56 

.45 

.26

2.43 

4.74 

.85 

.46 

.33

.29 

.31 

.26 

.26 

.23 

.34 

.55 

1.91 

2.44 

1.05 

.49 

.29

8.39

.35 

.31 

.28 

.26 

.30 

.57 

.45 

2.34 

1.07 

.50 

.30 

.21

6.74

.14 

.26 

.28 

.24 

.50 

.95 

5.55 

2.40 

.74 

.56 

.28

-

Acre-feet

19,800 

11,500 

11,500 

15,100 

M.31,300 

*»6 1,800 

25,000 

18,600 

10,600

100,000 

195,000 

54,900 

19,000 

15,400

11,800 

12,700 

10,900 

11,100 

9,440 

14,100 

21,700 

78,700 

101,000 

42,500 

20,000 

11,800

346,000

14,400 

12,600 

11,700 

10,500 

12,400 

15,400 

18,600 

96,500 

44,100 

20,800 

12,500 

8,690

278,000

5,580 

10,600 

11 ,400 

9*940 

12,500 

59,000 

157 ,000 

98,900 

50,700 

14,900 

11,500

382,000
SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Rock Creek near Qulgley, Mont. Continued

Month

1925-26

May. ..........................

September .....................

<gj 1926-27

April.........................

May...........................

September .....................

Discharge In second-feet

Maximum

218 

218 

189 

204 

. 172 

229 

1,520 

1,520 

1,080 

371 

229 

208

1,520

235 

294 

326 

286 

1,630 

3,840 

1,810 

500 

337

Minimum

198 

159 

152 

137 

141 

137 

154 

686 

371 

189 

159 

170

137

208 

163 

185 

200 

200 

745 

500 

337 

302

Mean

205 

189 

172 

162 

160 

175 

537 

1,070 

780 

260 

186 

194

341

226 

209 

268 

236 

434 

1,930 

879 

429 

318

Per 

square 

mile

0.266 

.245 

.223 

.210 

.207 

.227 

.696 

1.39 

1.01 

.337 

.241 

.251

.442

.293 

.271 

.347 

.306 

.362 

2.50 

1.14 

.556 

.412

Run- off

Inches

0.31 

.27 

.26 

.24 

.22 

.26 

.78 

1.60 

1.13 

.39 

.28 

.28

6.02

,34 

.30 

.23 

.35 

.63 

2,89 

1.30 

.64 

.46

Acre-feet

12,600 

11,200 

10,600 

9,960 

8,890 

10,800 

32,000 

65,800 

46,400 

16,000 

11,400 

11,500

247,000

13,900 

12,400 

9,570 

14,500 

25,800 

119,000 

54,000 

26,400 

18,900

East Pork of Rock Creek near Phillpsburg, Mont.

Location.- Staff gage, lat. 46°08'10", long. 113°23'10n , in NW-| sec. 5, T. 4 N., R. 14 

w., t!OO feet upstream from Flint Creek Canal, 300 feet downstream from Rock Creek 

Dam, 3 miles upstream from Meadow Creek, and 14 miles southwest of PMllpatiurg. 

Prior to Oct. 10, 1936, at site 600 feet upstream at different datim.

Records available.- June 1935 to September 1938.

Extremes.- Maxlnrum discharge observed, 269 second-feet June 15, 1935 (gage height, 

3.06 feet, site and datim then In use)j minimum observed, 2.1 second-feet Jan. 8- 

17, 1938 (gage height, 0-56 foot).

Remarks.- Flow completely regulated after Oct. 15, 1936, by Rock Creek Reservoir 

(capacity, 16,200 acre-feet).

Monthly discharge of East Fork of Rock Creek near Phllipsburg, Mont.

Month

July. ..........................................

The period.. ................................

April . .........................................

July. ..........................................

Water year 1935-36. .........................

Discharge in second-feet

Maximum

253 

116 

31 

21

_

17 

18 

18 

18 

10 

4.9 

12 

160 

188 

39 

24 

19

188

Miniimfifi'

84 

32 

21 

17

-

15 

16 

15 

11 

4.5 

4.1 

3.4 

12 

42 

23 

18 

15

3.4

Mean

162 

59.5 

24.7 

18.9

_

15.2 

16.6 

16.5 

14.0 

7.50 

4.64 

6.63 

71.4 

78.9 

30.7 

20.5 

16.7

25.0

Run- off 

in 

acre-feet

8,670 

3,660 

1,520 

1,120

14,970

936 

990 

1,020 

859 

431 

285 

394 

4,390 

4,690 

1,890 

1,260 

992

18,140
PEND OREILLE RIVER BASIN 97

Monthly discharge of East Fork of Rock Creek near Philipsburg, Mont. Continued

Discharge in second-feet

Maximum Minimum

Run'-off

in 

acre-feet

October 1936..........

November..............

December..............

Calendar year 1936.

January 1937..........

February..............

March.................

April.................

May...................

June..................

July...................

August................

September.............

Water year 1936-37.

October 1937..........

November..............

December..............

Calendar year 1937.

January 1938..........

February..............

March.................

April.................

May. ..................

June..................

July..................

August................

September.............

Water year 1937-38.

15

14

12

188

8.0

7.6

11

39

123

21

123

17

15

2.9

123

2.4

2.5

2.9

3.8

18

113

122

68

56

122

13

7.6

9.5

14.1

11.9

11.0

3.4

5.0

5.0

7.6

10

18

19

18

8.48

5.91

6.43

9.32

17.8

47.4

25.2

22.8

18.5

5.0

15

2.3

2.3

15.9

5.70

2.58

2.3 15.5

2.1

2.3

2.5

2.5

3.3

5.6

56

37

46

2.24

2.36

2.60

3.13

8.02

51.6

72.1

52.1

51.3

2.1 22.6

869

710

678

17,450

522

328

395

555

1,100

2,820

1,550

1,400

1,100

12,030

980

339

159

11,250

138

131

160

186

493

3,070

4,430

3,200

3,050

16,340

Ranch Creek near Quigley, Mont.

Location.- Staff gage, lat. 46°35', long. 113°40', in NEi sec. 36, T. 10 H., R. 17 W.

[unsurveyed), a quarter of a mile upstream from mouth and 2i miles south of Quigley. 

Drainage area.- 42.7 square miles. 

Records available.- May 1922 to September 1927. 

Extremes.- Maximum discharge observed, 238 second-feet May 19, 20, 1922; minimum observed, 10.7 second-feet Feb. 1, 1924. 

Remarks.- Ho large diversions above gage.

Monthly discharge of Ranch Creek near Quigley, Mont.

Month

Discharge in second-feet

Maximum Minimum

Per 

square 

mile

Run-off

Acre-feet

May, 2-31. 

June......

July......

August....

Sept ember.

The period.

October.. . 

November.. 

December. 

January. . 

February.. 

March.....

April-....

May.......

June......

July......

August....

September.

The year.

238

226

81

38

31

23

20

19

30

56

145

115

73

42

30

145

143

155

55.4

32.0

25.2

3.35

3.63

1.30

.750

.590

3.74

4.05

1.50

.87

.66

18

18

15

16

35

73

36

30

30

15

20.3 

18.6 

18.0 

18.0 

16.0 

16.3 

32.8 

82.4 

80-0 

56.1 

35.7 

5Q.Q

35.4

.475

.436

.422

.422

.375

.382

.768

1.93

1.87

1.31

.836

.703

.829

.55

.47

.49

.47

.39

.44

.86

2.22

2.09

1.53

.96

.78

11.25

8,510

9,220

3,410

1,970

1,500

24,600

1,250

1,110

1,110

1,110

889

1,000

1,950

5,070

4,760

3,450

2,200

1,790

25,700
98 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Ranch Creek near Qulgley, Hont. Continued

Month

Discharge In second-feet

Maximum Minimum Mean

Per 

square 

mile

Run-off

Inches

1923-24 

Oct ober............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1924-25 

November 17-30.....

December...........

January............

February...........

March..............

April..............

Hay................

June...............

July...............

August.............

September..........

The period......

1925-26 

October............

November...........

December...........

March 21-31........

April..............

May.......... ......

June...............

July...............

August.............

September..........

1926-27 

October............

November...........

December 1-11......

March..............

April..............

May................

June...............

July...............

August.............

September..........

112

81

51

164

78

38

36

21

164

27

27

19

21

25

101

145

101

76

36

32

18

21

38

25

95

138

217

67

38

30

30.4

26.5

el6.0

e!2.0

43.1

32.0

31.2

115.0

52.0

37.8

26.5

19.8

0.712

.621

.375

.281

1.01

.750

.731

2.69

1.22

.886

.621

.464

0.82 

.69 

.43

1.09

.87

.82

3.10

1.36

1.02

.72

.52

.864 11.76

25.1

22.2

18.5

18.6

20.3

61.8

112

80.5

45.4

33.2

27.9

.588

.520

.433

.436

.475

1.45

2.63

.89

.06

.778

.513

.31

. .60

.50

.45

.55

1.62

3.03

2.11

1.22

.90

.57

24.6

24.3

22.2

19.8

36.4

48.0

36.2

21.7

17.7

17.6

18.0

18.3

24.3

21.2

34.4

84.1

138

49.9

30.9

26.4

.576

.569

.520

.469

.852

1.12

.84

.508

.415

.412

.422

.429

.569

.497

.206

1.97

3.23

1.17

.724

.618

.66 

.64 

.60 

.19 

.95 

1.29 

.94 

.58 

.48

.49

.48

.23

.57

.90

2.27

3.61

1.35

.83

1,870

1,580

984

738

2,480

1,970

1,860

7,070

3,090

2,320

1,630

1,180

26,800

697

1,360

1,140

1,030

1,250

3,680

6,890

4,790

2,790

2,040

1,660

27,300

1,510

1,450

1,360

432

2,170

2,950

2,150

1,330

1,090

1,050

1,110

1,090

530

1,300

2,050

5,170

8,210

3,070

1,900

1,570

Blackfoot River at Clearwater, Hont.

Location. - Wire-weight gage, lat. 46°58', long. 113°22', in sec. 16, T. 14 N-, R. 14 W., 

300 feet upstream from Clearwater River, 200 feet upstream from highway bridge, and 

1 mile south of Clearwater post office.

Drainage area.- 1,320 square miles.

Records available.- June 1921 to September 1923 .

Extremes.- Maximum discharge observed, 7,820 second-feet June &', 1922 (gage height, 6.4 

feet); minimum observed, 410 second-feet Nov. 13-21, 1923 (gage height, 1.00 foot).

Remarks.- Several small diversions above station for irrigation.

Honthly discharge of Blackfoot River at Clearwater, Mont.

Honth

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

June 9-30. 

July......

August....

September.

1921

6,290

2,200

812

572

2,270

832

543

487

3,930

1,290

665

520

The period.

171,000

79,300

40,900

30,900

322,000
PEND OREILLE RIVER BASIN 99

Monthly discharge of Blackfoot River at Clearwater, Mont. Continued

Month - .

1921-22

April 26-30 ...................................

May. ...........................................

1922-23

July. ..........................................

Discharge In second-feet

Maximum

543 

514 

1,030 

7,480 

7,820 

1,680 

772 

572

460 

460 

1,130 

6,630 

5,950 

2,200 

851 

572

Minimum

487 

487 

960 

937 

1,740 

772 

543 

435

435 

410 

514 

1,230 

2,480 

894 

572 

487

Mean

517' 

504 

998 

3,420 

4,910 

1,090 

642 

504

441 

429 

791 

3,520 

3,970 

1,340 

695 

512

Run- off 

in 

acre-feet

31,800 

19,000 

9,900 

210,000 

292,000 

67,000 

39,500 

30,000

27,100 

25,500 

23,500 

216,000 

236,000 

82,400 

42,700 

30, 500

Blackfoot River near Bonner, Mont.

Location.- Chain gage, lat. 46*53', long. IIS'52', in NW-J sec. 21, T. 13 N., R. 18 W.,

at highway bridge an eighth of a mile upstream from mouth and half a mile west of

Bonner.

Drainage area.- 2,465 square miles.

geeords available.- July 1898 to June 1901, May 1903 to October 1905. 

Extremes.- Maximum daily discharge, 0.7,240 second-feet June 20, 1899 (gage height,

8.70 feet); minimum daily, 320 second-feet Mar. 12, 1905 (gage height, 0.05 foot). 

Remarks.- Considerable regulation at power dam half a mile upstream. Several dlversions above station for irrigation.

Monthly discharge of Blackfoot River'near Bonner, Mont 

Month

1898

1898-99

July...- . 

Sept ember .....................

1899-1900

Sept ember ................ 

Discharge in second-feet

Maximum

5,520 

1,613 

1,030

1,185 

1,090 

1,185 

1,390 

7,416 

14,598 

17,244 

12,078 

2,810 

1,460

1,205 

1,275 

1,420 

945 

743 

3,125 

3,749 

12,559 

4,074 

1,830 

1,067 

986

12,559

Minimum

1,550 

975 

887

837 

8SO 

850 

730 

740 

2,112 

10,818 

2,810 

1,420 

1,050

965 

990 

865 

662 

460 

380 

1,310 

3,514 

1,880 

1,026 

864 

743

380

Mean

a2,797 

1,190 

962

968 

897 

a939 

a831 

2,516 

7,699 

13,615 

6,557 

1,921 

1,250

1,073 

1,074 

1,012 

787 

634 

1,278 

2,707 

6,566 

3,116 

1,349 

944 

859

1,790

Per 

square 

mile

1.13 

.48 

.39

.39 

.36 

.38 

.34 

1.02 

3.12 

5.52 

2.66 

.78 

.51

.44 

.44 

.41 

.32 

.26 

.52 

1.10 

2.66 

1.26 

.55 

.38 

.35

.726

Run-off

Inches

1.30 

.55 

.44

.45 

.40 

.44 

.39 

 1.14 

3.60 

6.16 

3.07 

.90 

.57

.51 

.49 

.47 

.37 

.27 

.60 

1.23 

3.07 

1.41 

.63 

.44 

.39

9.88

Acre-feet

172,000 

73,200 

57,200

59,500 

53,400 

57,700 

51,100 

150,000 

473,000 

810,000 

403,000 

118,000 

74,400

66,000 

63,900 

62,200 

48,400 

35,200 

78,600 

161,000 

404,000 

185,000 

83,000 

58,000 

51,100

1,300,000

a Partly estimated.
100 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Blackfoot River near Bonner, Mont. Continued

Month

Discharge in aecond-feet

Maximum Minimum Mean square 

mile

Run-off

Inches Acre-feet

1900-1901 

October. ...........

November...........

Decanter...........

January............

February...........

March..............

April..............

May................

June...............

The period......

1903 

May 15-31........ .. .

June................

July................

August..............

September...........

1903-4 

October.............

Nov ember............

December. ...........

January.............

February............

March...............

April...............

May.................

June ................

July................

August..............

September...........

The year.........

1904-5 

October.............

November............

December............

January 1-11, 27-31. 

March...............

April...............

May.................

June................

July................

August..............

September...........

October.............

945

824

1,067

1,060

1,310

3,988

2,950

12,302

7,676

662

662

581

550

450

550

585

3,899

2,650

773

a 760

a 749

673

580

1,017

1,186

8,552

3,698

0.31

.31

.30

.27

.24

.41

.48

3.47

1.50

0.36

.35

.35

.31

.25

.47

.54

4.00

1.67

6,060

3,220

1,470

1,070

2,730

1,425

920

780

4,334

a7,575

2,191

1,105

889

1.758

3.073

.889

.448

.361

1.11

3.43

1.02

.52

.40

1,180

1,040

1,470

810

635

1,020

7,500

8,820

6,540

2,395

1,140

810

890

830

805

605

525

525

705

4,250

2,330

1,140

740

550

1,011

920

920

666

574

668

3,785

6,066

4,217

1,638

898

684

.410

.373

.373

.270

.233

.271

1.535

2.461

1.711

.664

.364

.277

.47

.42

 43

.31

.25

.31

1.71

2.84

1.91

.77

.42

.31

525 1,838 .746 10.15

1,260

550

610

1,120

940

735

2,420

4,360

1,760

735

500

560

440

440

420

365

320

365

700

1,760

770

440

340

365

581

509

472

572

459

463

1,294

2,936

1,079

565

407

465

.236

.206

.191

.232

.186

.188

.525

1.19

.437

.229

.165

.189

.27 

.23 

.22 

.14 

.21 

.21 

.60 

L.33 

.50 

.26 

.18 

.22

47,500

45,200

46,000

41,400

32,200

62,500

70,600

526,000

220,000

1,090,000

146,000

451,000

135,000

67,900

52,000

62,200

54,700

56,600

41,000

33,000

41,100

225,000

373,000

251,000

101,000

55,200

40,700

1,330,000

35,700

30,500

29,000

18,200

28,200

27,600

79,600

175,000

66,400

54,700

24,200

28,600

a Partly estimated.

Nevada Creek near Finn, Mont.

Location.- Staff gage, lat. 46°48>, long. 112°48', in NE-J sec. 13, T. 12, N., R. 10 W.,

6 miles west of Finn.

Records available.- May 1934 to September 1938. 

Extremes.- Maximum discharge, 1,200 second-feet (estimated) Apr. 11, 1936 (gage height,

4.26 feet from floodmark)} minimum discharge observed, 4.6 second-feet Sept. 18-20,

1937 (gage height, 0.94 foot). 

Remarks.- Some diversions above station for irrigation.

Monthly discharge of Nevada Creek near Finn, Mont.

Discharge In second-feet

Maximum Minimum ' Mean

Run-off

in 

acre-feet

Hay 10-31, 1934. 

June............

July............

August..........

September.......

72

19

14

13

51

23

7.7 

8.7 

8.7

53.5

36.6

13.4

10.5

10.5

The period.

2,330

2,180

826

646

627

6,610
PEND OREILLE RIVER BASIN 101

Monthly discharge of Nevada Creek near Finn, Mont. Continued

Discharge in second-feet

Maximum Minimum - Mean

Run-off

in 

acre-feet

October 1934. .........

November ...............

April 1935. . ..........

May. ..................

June ..................

July. .................

August ................

September. ............

October 1935 ..........

November ..-.. ..........

December ..............

January 1936 ..........

February ..............

March. ................

April. ................

May. ..................

June ..................

July. .................

August ................

September .............

Water year 1935-36.

October 1936. .........

November ..............

December ..............

Calendar year 1936.

January 1937 ..........

February ..............

March. ................

April. ................

May. ..................

June ..................

July. ............ ^ ....

August ................

September. ............

Water year 1936-37.

October 1937. .........

November ..............

December ..............

Calendar year 1937 .

January 1938 ..........

February ..............

March. ................

April .................

May. ..................

June ..................

July. .................

August ................

September .............

Water year 1937-38 .

16

14

146

86

51

35

12

7.1

13

340

152

90

21

13

14

340

12

12

102

56

44

21

12

9.6

102

102

265

344

220

235

22

15

344

11

20

22

11

5.6

5.0

12.7

12.5

41.7

38.6

34.0

18.1

7.96

5.89

5.6

10

30

20

10

8.4 

9.2

8.8

8.5

9.0

9.5

10.0

14.2

102

82.0

40.7

15.0

10.2

10.4

5.6 26.6

9.9.

10.6

9.0

26.9

12

31 _

20 

7.6 

5.1 

4.6

9.5

10.0

11.0

39.1

43.5

28.9

13.1

7.48

6.33

4.6 16.5

6.34

7.07

6

 10 

57 

45 

23 

15 

8.2

. 11.6

96.3

151

107

69.5

17.7

9.89

41.4

780

744

2,480

2,380

2,030

1,110

490

350

540

506

553

584

575

87.

6,080

5,040

2,420

922

629

620

19,340

612

629

553

19,540

584

555

678

2,550

2,680

1,720

805

460

377

11,980

390

421

369

11,370

369

333

714

5,730

9,310

6,390

4,270

1,090

588

North Fork of Blackfoot River near Ovando, Mont.

-~ ^nflvf1 ^1 * ^f6 ' lat> 47 ° 03 '' long- H2°59«, in BWi sec. 22, T. 15 N., R.

at Pitkins ranch, 11 miles northeast of Ovando. 

area.- 227 square miles. 

.vallable.- vct^.j.ai-'j.g.- June uuuv1021 ADG.L to September septemoer 1923. lykJo

.- Maximum discharge observed, 2,900 second-feet June 5, 1922 (gage height. 7.58 

minimum observed. 27 HBnonri-fBet-. H K_IC -ir,oo -_j i__ -, ,= nS« 7 °^ 

,i uj. D uiu»i 6o uuBoi-veu, ,s,»uu secona-reet June £>, 1922 (sa.se 

minimum observed, 27 second-feet Nov. 6-16, 1922, and Apr. 15, 1923 

, 2.44 and 2.43 feet respectively). 

Two small diversions above station for irrigation.
102 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of North Pork of Blackfoot River near Ovando, Mont.

Month

1921

1921-22

May...........................

July. .........................

1923

July. .........................

Discharge in second-feet

Maximum

2,400 

604 

136 

56

-

38 

30 

2,590 

2,820 

498 

124 

67

358 

2,500 

2,320 

748 

146 

90

Minimum

644 

140 

38' 57 

-

30

57 

539 

128 

63 

43

27 

242 

858 

142 

90 

64

Mean

1,330 

280 

84.4 

46.4

-

34.5 

27.8 

882 

1,620 

255 

92.5 

53.7

116 

1,220 

 1,440 

374 

111 

71.9

Per 

square 

mile

5.86 

1.23 

.372 

.209

-

.152 

.122 

3.89 

7.14 

1.12 

.407 

.237

.511 

5.37 

6.34 

1.65 

.489 

.317

Run- off

Inches

5.01 

1.42 

.43 

.23

-

.18 

.07 

4.48 

7.97 

1.29 

.47 

.26

.30 

6.19 

7.08 

1.90 

.56 

.18

Acre-feet"

60,700 ' 

17,200 

5,190 

2,760

85,800

2,120 

882 

54,200 

96,400 

15,700 

5,690 

3,200

3,680 

75,000 

85,700 

23,000 

6,820 

2,140

Clearwater River at Clear-water, Mont.

Location.- Wire-weight gage, lat. 46°58», long. 113°22', in sec. 16 T. 14 N., R. 14 W., 

400 feet upstream from mouth and 1 mile south of Clearwater post office.

Drainage area.- 398 square miles.

Records available.- June 1921 to September 1923.

Extremes.- Maximum discharge observed, 2,400 second-feet May 12 and 26, 1922 (gage height, 

3.9 feet); minimum observed, 30 second-feet Oct. 23 and Nov. 21, 1922 (gage height, 

0.7 foot).

Remarks.- Several diversions above station for irrigation.

Monthly discharge of Clearwater River at Clearwater, Mont.

Month

1921

1921-22

1922-23

Discharge in second-feet

Maximum

1,310 

375 

105 

55

-

55 

55 

578 

2,400 

2,250 

470 

155 

90

52 

45 

950 

1,600 

1,400 

470 

155 

90

Minimum,

375 

112 

55 

45

-

55 

45 

318 

615 

505 

155 

65 

65

30 

30 

345 

860 

470 

138 

90 

45

Mean

687 

203 

82.1 

54.2

-

55.0 

51.3 

443 

1,560 

1,270 

300 

88.6 

73.0

36.0 

32.9 

629 

1,280 

947 

271 

118 

65.3

Per 

square 

mile

1.73 

.510 

.206 

.136

-

.138 

.129 

1.11 

3.92 

3.19 

7.54 

.223 

.183

.090 

.083

3.22 "" 

2.38 

.681 

.296 

.164

Run- off

Inches

1.41 

.59 

.24 

.15

-

.16 

.09 

.21 

4.52 

3.56 

.87 

.26 

.20

.10 

.09 

.88 

3.71 

2.66 

.79 

.34 

.18

Acre-feet

30,000 

12,500 

5,050 

3,230

50,800

3,380 

1,930 

4,390 

95,900 

75,600 

18,400 

5,450 

4,340

2,210 

1,960 

18,700 

78,700 

56,400 

16,700 

7,260 

3,890

Rattlesnake Creek at Missoula, Mont.

Location.- Chain gage, lat. 46°52', long. 113°59', at Ivy Street Bridge in Missoula. 

------ J - available.- May to December 1899.

feet): minimum observed7 36 second-feet Dec. 16 («aae height. 2730 feetT. 

Re

ReeordsTvallable.- May to December 1899.

Extremes.- Maximum discharge observed, 2,047 second-feet June 18 (gage height, 6.

feet); minimum observed, 36 second-feet Dec. 16 (gage height, 2.30 feet). 

Remarks.- Many diversions above station for Irrigation. Some regulation by power

cabinet shop In Missoula.

by power plant
PEND OREILLE RIVER BASIN 103

Monthly discharge of Rattlesnake Creek at Missoula, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

May 27-31. 

June......

July......

August....

September. 

October... 

November.. 

December..

1899

2,047 

l',200 

87 

72 

80 

94 

94

490

94

52

46

44

52

36

846

1,197

511

63

57

70

64

74

The period.

71,200

31,400

3,870

3,390

4,300

3,810

4,550

123,000

West pork of Bitterroot River near Darby, Mont.

Location.- Chain gage, lat. 45°54', long. 114B 11», in sec. 27, T. 2 N., R. 21 W., 500

feet downstream from Trapper Creek ranger station, half a mile downstream from Trapper

Creek, and 10 miles south of Darby. 

Drainage area.- 572 square miles.

Records available.- September 1910 to September 1916. 

Extremes.-Maximum~dlscharge observed, 6,420 second-feet May 27, 1913 (gage height, 7.4

feet); minimum observed, 106 second-feet Aug. 28 to Sept. 7, 1914 (gage height, 1.85

feet). 

Remarks.- No diversion or regulation.

Monthly discharge of West Pork of Bitterroot River near Darby, Mont.

Discharge in second-feet

Maximum

Per 

square 

mile

Run-off

Inches Acre-feet

1910 

September 19-30......

1910-11 

October..............

November.............

December.............

March 20-31..........

April................

May..................

June.................

July.................

August...............

September............

October..............

1912 

March 24-31..........

April................

May..................

June.................

July.................

August 1-8...........

The period........

1913 

April..'.. ............

May..................

June.................

July.................

August. ..............

September............

1913-14 

November.............

March................

April................

May..................

June.................

July.................

August...............

September............

1915 

July.................

August...............

177

335

580

330

705

1,750

2,830

4,000

1,580

355

205

245

140

170

191

408

462

1,180

1,330

295

176

170

170

160

236

372

261

557

808

1,760

2,750

683

231

177

191

0.280

.413

.650

.456

.974

1.41

3.08

4.81

1.19

.404

.309

.334

.48

.73

.53

.43

1.57

3.55

5.37

1.37

.47

.34

.39

640

1,300

4,660

5,340

2,900

652

465

492

798

2,450

656

415

547

833

2,930

4,080

1,060

560

.956

1.46

5.12

7.13

1.85

.379

.28

1.63

5.90

7.96

2.13

.29

2,170

6,420

5,520

1,480

465

209

227

310

1,300

3,200

3,050

290' 865

290

975

370

216

975

1,480

472

202

175

192

340

765

798

271

106

106

370

150

1,060

3,130

3,220

909

288

189

210

229

760

2,070

1,430

477

167

168

647

252

1.85

5.47

5.63

1.59

.504

.330

.367

.400

1.33

3.62

2.50

.834

.292

.292

2.07

6.31

6.28

1.83

.58

.37

.41

.46

1.48

4.17

2.79

.96

.34

.33

3,810

14,500

22,100

16,000

13,200

108,000

164,000

42,000

14,200

10,500

11,700

8,680

49,600

180,000

243,000

65,200

8,890

555,000

63,100

192,000

192,000

55,900

17,700

11,200

12,500

14,100

45,200

127,000

85,100

29,300

10,300

10,000

39,800

15,500
104 ' SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN,^1898-1938

Monthly discharge of West Pork of Bltterroot River near Darby, Mont. Continued

Month

1915-16

May. ..........................

Discharge in second-feet

Maximum

216 

150 

3,050 

4,830 

5,520 

3,200 

580

Minimum

150 

150 

520 

1,220 

1,690 

580 

216

Mean

175 

150 

1,160 

2,040 

3,270 

1,600 

344

Per 

square 

mile

0.306 

.162 

2.06 

3.57 

5.72 

2.80 

.602

Run-off

Inches

0.24 

.06 

2.30 

4.12 

6.38 

3.23 

.69

Acre-feet

7,290 

2,980 

69,000 

125,000 

195,000 

98,400 

21,200

Bitterroot River near Darby, Mont.

Location.- Wire-weight gage, lat. 45°59', long. 114°09', In NEj sec. 36, T. 3 N., R. 21 

W., at bridge on TJ. S. Highway 93, a quarter of a mile downstream from Chaffin Creek 

and 4 miles southeast of Darby.

Drainage area.- 1,050 square miles.

Records available.- April 1937 to September 1938.

Extremes.- Maximum discharge observed, 5,480 second-feet May 29, 1938 Cgage height, 6.51 

feet); minimum observed, 84 second-feet Dec. 9, 1937 (gage height, 1.06 feet).

Remarks.- Many diversions above station for Irrigation.

Monthly discharge of Bltterroot River near Darby, Mont.

Month

1937 

April 4-30.............................. .......

1937-38

July. ..........................................

Discharge in second-feet

Maximum

611 

2,650 

1,880 

680 

244 

160

-

160 

180 

430 

190 

202 

287 

2,500 

5,340 

4,220 

1,680 

378 

223

5,340

Minimum

169 

487 

753 

230 

116 

106

-

135 

130 

88 

135 

138 

172 

199 

1,130 

1,570 

404 

216 

155

88

Mean

322 

1,966 

1,380 

376 

146 

129

-

143 

158 

185 

166 

167 

224 

938 

2,583 

2,705 

910 

275 

184

721

Run- off 

in 

acre-feet

17,260 

120,900 

82,140 

23,110 

8,980 

7,660

260,000

8,800 

9,390 

11,380 

10,210 

9,290 

13,800 

55,820 

158,800 

160,900 

55,970 

16,890 

10,980

522,200

Bltterroot River near Grantsdale, Mont.

Location.- Chain gage, lat. 46°12«, long. 114°10«, In sec. 13, T. 5 N., R. 21 W., at

highway bridge V miles southwest of Grantsdale. 

Drainage area.- 1,550 square miles. 

Records available.- April 1902 to December 1907. 

Extremes.- Maximum discharge observed, 12,880 second-feet J.une 3, 1903 (gage height,

7.30 feet); minimum observed, 5 second-feet Sept. 19-22, 1905 (gage height, 1.0 foot). 

Remarks.- Several diversions above station for irrigation.
PEND OREILLE RIVER BASIN 105

Monthly discharge of Bitterroot River near Grantsdale, Mont.

Month

1902

May. ..........................

1902-3

1903-4

September .....................

The year. ..................

1904-5

May...........................

September. ....................

1905-6

April.........................

a Partly estimated.

Discharge In second-feet

Maximum

11,075 

9,285 

3,700 

790 

205

-

280 

615 

1,150 

700 

530 

1,150 

3,050 

6,150 

12,875 

3,700 

700 

1,150

12,875

1,585 

790 

1,020 

450 

540 

930 

5,230 

11,825 

7,425 

3,335 

675 

115

11,825

170 

225 

225 

392 

428 

592 

2,105 

3,215 

5,235 

2,435 

395 

145

5,235

325 

395

470

725 

3,550 

4,110 

4,110 

1,700 

260 

260

4,110

Minimum

900 

3,050 

900 

205 

135

-

206 

280 

340 

395 

395 

340 

615 

1,745 

4,575 

700 

175 

150

150

460 

530 

530 

225 

225 

290 

540 

3,620 

3,060 

770 

88 

65

65

55 

130 

170 

360 

360 

360 

360 

920 

1,825 

395 

50 

5

5

145 

200

/ 200 

200 

325 

510 

1,825 

1,570 

110 

60 

80

60

Mean

1,085 

4,823 

5,176 

2,143 

428 

167

-

242 

353 

472 

518 

471 

519 

1,409 

3,031 

7,968 

1,912 

334 

481

1,472

825 

615 

650 

29.6 

323 

490 

2,783 

5,868 

5,208 

1,899 

246 

74

1,609

118 

179 

181 

a385 

a394 

485 

915 

1,544 

3,276 

' 1,111 

168 

44

732

247 

264 

a260 

a359 

a380 

450 

1,370 

2,800 

2,540 

866 

127 

157

819

Per 

square 

mile

0.70 

3.11 

3.34 

1.38 

.28 

.11

-

.16 

.23 

.30 

.334 

.304 

.335 

.909 

1.955 

5.141 

1.234 

.215 

.310

.950

.532 

.397 

.419 

.191 

.208 

.316 

1.795 

3.786 

3.360 

1.225 

.159 

.048

1.04

.076 

.115 

.117 

.248 

.254 

.313 

.590 

.996 

2.11 

.717 

.108 

.029

.472

.159 

.170 

.168 

.232 

.248 

.290 

.884 

1.81 

1.64 

.559 

.082 

.101

.528

Run-off

Inches

0.16 

3.59 

3.73 

1.59 

.32 

.12

_

.18 

.26 

.35 

.38 

.32 

.39 

1.01 

2.26 

5.74 

1.42 

.25 

.35

12.91

.62 

.44 

.48 

.22 

.22 

.36 

2.00 

4.36 

3.75 

1.41 

.18 

.05

14.09

.09 

.13 

.14 

.29 

.26 

.36 

66 

1.15 

2.35 

.83 

.12 

.03

6.41

.18 

.19 

.19 

.27 

.26 

.34 

.99 

2.09 

1.83 

.64 

.09 

.11

7.18

Acre-feet

12,900 

297,000 

308,000 

132,000 

26,300 

9,940

786,140

14,900 

21,000 

29,000 

31,800 

26,200 

31,900 

83,800 

186,000 

474,000 

118,000 

20,500 

28,600

1,070,000

50,700 

36,600 

40,000 

18,200 

18,600 

30,100 

166,000 

361,000 

310,000 

117,000 

15,100 

4,400

1,170,000

7,260 

10,600 

11,100 

23,700 

21,900 

29,800 

54,400 

94,900 

195,000 

68,300 

10,300 

2.640

530,000

15,200 

15,700 

16,000 

22,100 

21,100 

27,800 

81,500 

172,000 

151,000 

53,200 

7,810 

9,340

593,000
106 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Bltterroot River near Srantsdale, Mont. Continued

Month

1906-7

July. .........................

1907

Discharge In second-feet

Maximum

1,450 

8,100 

1,020 

685 

932 

1,210 

3,840 

9,430 

11,800 

7,390 

1,730 

830

11,800

430 

390 

470

Minimum

150 

470 

592 

430 

685 

430 

880 

1,730 

4,380 

1,800 

315 

350

150

280 

280 

280

Mean

386 

1,650 

750 

a 541 

793 

694 

2,010 

5,610 

7,250 

4,040 

803 

583

2,090

367 

351 

351

Per 

square 

mile

.249 

1.06 

.484 

.349 

.512 

.448 

1.30 

3.62 

4.68 

2.61 

.518 

.376

1.35

.237 

.226 

.226

Run-off

Inches

.29 

1.18 

.56 

.40 

.53 

.52 

1.45 

4.17 

5.22 

3.01 

.60 

.42

18.35

.27 

.25 

.26

Acre-feet

23,700 

98,200 

46,100 

33,300 

44,000 

42,700 

120,000 

345,000 

431,000 

248,000 

49,400 

34,700

1,520,000

22,600 

20,900 

21,600

a Partly estimated.

Yearly discharge of Bltterroot River near Srantsdale, Mont.

Year

1904..........

Year ending Sept. 30

Discharge In 

second-feet

.Mean

1,472 

1,609 

732 

819 

2,090

Per 

square 

mile

0.950 

1.04 

.472 

.528 

1.35

Run- off

Inches

12.91 

14.09 

6.41 

7.18 

18.35

Acre-feet

1,070,000 

1,170,000 

530,000 

593,000 

1,520,000

Calendar year

Discharge In 

second-feet

Mean

1,558 

1,473 

757 

986 

1,952

Per 

square 

mile

1.01 

. .950 

.488 

.636 

1.26

Run-off

Inches

13.66 

12.91 

6.61 

8.65 

17.10

Acre-feet

1,130,000 

1,070,000 

548,000 

714,000 

1,410,000

Bltterroot River near Missoula, Mont.

Locat1on.- Wire-weight gage, lat. 46°51>, long. 114°06', In SWj sec. 26, T. 13 N., R.

«JO w., at highway bridge half a mile upstream from mouth and 7 miles southwest of

Mlssoula.

Drainage area.- 3,260 square miles. 

Records 

1904., 

available.- July 1898 to November 1901, June to July 1903, January to December

Extremes.- Maximum dally discharge, 37,440 second-feet June 20, 1899 (gage height,

11.45 feet); minimum dally, 370 second-feet Sept. 16-29, 1904 (gage height, 1.12

feet). 

Remarks.- Many diversions above station for Irrigation.

Monthly discharge of Bltterroot River near Missoula, Mont.

Month

Discharge In second- feet

Maximum

7,930 

1,930 

1,190

Minimum

2,000 

950 

875

Mean

a4,148 

1,201 

1,021

Par 

square 

mile

1.27 

.37 

.31

Run- off

Inches

1.46 

.43 

.35

Acre-feet

255,000 

73,800 

60,800

a Partly estimated.
PEND OREILLE RIVER BASIN 107

Monthly discharge of Bltterroot River near Mlasoula, Mont. Continued

Month

July..........................

Water year 1898-99. . .......

July..........................

April......-.-...'. ............

May...........................

Julv. .........................

May...........................

July..........................

Discharge In second-feet

Maximum

1,325 

1,278 

1,730

1,255 

4,230 

15,800 

37,437 

23,600 

5,330 

2,160

37,437

2,160 

1,830 

1,540

37,437

1,540

2,280 

4,600 

18,150 

10,650 

3,570 

1,010 

1,350

18,150

8,250 

1,930 

1,350

18, 150

2,750

18,375 

11,700 

3,650 

1,200 

1,320

18,375

1,250 

1,175

18,000 

7,000

1,075 

1,525 

3,060 

9,140 

18,320 

11,520 

6,050 

1,770 

615 

685 

685 

650

18,320

Minimum

1,025 

1,075 

1,000

930 

1,122 

2,680 

11,400 

5,440 

1,985 

1,122

_

1,122 

1,165 

1,165

-

1,080

910 

1,930 

6,400 

4,060 

980 

800 

950

800

1,010 

1,122 

950

800

1,390

7,210 

3,050 

1,225 

940 

940

940

1,080 

1,100

7,300 

2,800

685 

545 

830 

1,435 

5,140 

4,940 

1,870 

545 

370 

405 

680 

440

370

Mean

1,149 

1,154 

al,137 

el, 200 

el, 000 

1,070 

2,842 

7,729 

21,876 

14, 497 

3,411 

1,622

4,898

1,470 

1,477 

1,351

4,970

1,221 

al,084 

al,652 

3,626 

9,871 

7,352 

1,820 

869 

1,137

2,753

2,838 

al,373 

1,148

2,842

al,360 

al,401 

1,691 

al,866 

11,025 

5,020 

2,667 

995 

1,130

2,684

1,157 

1,149

12,170 

4,280

799 

788 

1,434 

4,592 

9,031 

a8,397 

3,469 

al,190 

455 

568 

614 

530

2,656

Per 

square 

mile

0.35 

.35 

.35 

.37 

.31 

.33 

.87 

2.37 

6.71 

4.45 

1.05 

.50

1.50

.45 

.45 

.41

1.52

.37 

.33 

.51 

1.11 

3.03 

2.26 

.56 

.27 

.35

.84

.87, 

.42 

.35

.87

.42 

.43 

.52 

.57 

3.38 

1.54 

.82 

.31 

.35

.82

.36 

.35

3.73 

1.31

.245 

.242 

.440 

1.409 

2.770 

2.576 

1.064 

.365 

.140 

.174 

 188 

.163

.815

Run- off

Inches

0.40

.39 

.40 

.43 

.32 

.38 

.97 

2. -73 

7.49 

5.13 

1.21 

.56

20.41

.52 

.50 

.47

20.71

.43 

.34 

.59 

1.24 

3.49 

2.52 

.65 

.31 

.39

11.45

1.00 

.47 

.40

11.83

.49 

.45 

.60 

.51 

3.90 

1.72 

.95 

.36 

.39

11.24

.42 

.39

4.16 

1.51

.28 

.26 

.51 

1.57 

3.19 

2.87 

1.23 

.42 

.16 

.20 

.21 

.19

11.09

Acre-feet

70,600 

68,700 

69,900 

73,800 

55,500 

65,800 

169,000 

475,000 

1,300,000 

891,000 

210,000 

96,500

3,550,000

90,400 

87,900 

83,100

3,600,000

75,100 

60,200 

102,000 

216,000 

607,000 

438,000 

112,000 

53,400 

67,700

1,993,000

174,000 

81,700 

70,600

2,058,000

83,600 

77,800 

104,000 

81,400 

678, 000 

299,000 

164,000 

61,200 

67,500

1,943,000

71,100 

68,400

724,000 

263,000

49,100 

45,300 

88,200 

273,000 

555,000 

500,000 

213,000 

73,200 

27, 100 

35,000 

36,500 

32,600

1,928,000

a Partly estimated, 

e Estimated.
108 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

East Pork of Bitterroot River at Conner, Mont.

Location.- Wire-weight gage, lat. 45°56', long. 114°08', in SW£ sec. 7, T. 2 N., R. 20

w -» at highway bridge at Conner, about half a mile upstream from confluence with

West Pork. 

Drainage area.- 404 square miles; 394 square miles (revised) at previous site near

Darby. 

Records available.- April 1937 to September 1938. September 1910 to August 1914 at

site near Darby 2^ miles upstream. 

Extremes.- Maximum discharge observed, 2,230 second-feet May 31, 1913 (gage height,

7.O feet, site and datum then in use)} minimum observed, 1.4 second-feet Aug. 17,

1937* 

Remarks.- A few small diversions above station.

________Monthly discharge of East Pork of Bitterroot River at Conner,, Hont. ___

Month

Discharge in second-feet

Maximum Minimum

Per 

square

milet

Inches- Acre-feet

1910-11 

September 20-30....

October............

November...........

December...........

April 7-30.........

May................

June...............

July.. ........'.....

August.............

1912 

April 17-30........

May................

June...............

July...............

August.............

September 1-5......

The period......

1913 

April. .............

May................

June...............

July...............

August.............

The period......

1913-14 

March..............

April..............

May................

June...............

July...............

August.............

The period......

1937 " 

April 4-30.........

May................

June..... ..........

July...............

August.............

Sept ember..........

The period......

1937-38 

October............

November...........

December...........

January............

February...........

March..............

April...... ........

May................

June...............

July...............

August.............

September..........

The year........

104

166

166

145

428

749

1,730

890

224

286

1,840

2,150

1,430

332

286

446

2,200

2,140

810

252

102

320

1,360

1,540

136

650

411

118

55

39

53

54

114

91

79

452

1,700

1,430

609

100

47

1,700

84

84

66

50

145

286

655

200

85

93.5

104

111

108

216

583

1,200

369

138

0.237

.264

.282

.274

.548

1.48

3.05

.937

.350

0.10

.30

.31

.32

.49

1.71

3.40

1.08

.40

236

260

1,250

286

167

186

266

799

1,800

597

231

227

.675

2.03

4.57

1.52

.586

.576

.35

2.34

5.01

1.75

.86

.11

150

292

760

266

102

287

1,010

1,480

439

173

.728

2.56

3.76

1.11

.439

.81

2.95

4.20

1.28

.51

85

94

238

379

162

87.9

202

860

744

264

104

.223 

.51 

2.18 

1.89 

.670 

.'264

.26

.57

2.51

2.10

.77

.30

44

110

130

48

5.3

8.0

76.6

408

310

80.5

23.1

22.5

.190

1.01

.769

.200

.057

.056

.19 

1.16 

.86 

.23 

.07 

.06

38

38

30

46

51

59

328

496

105

45

20

43.3

44.9

59.7

44.9

69.4

63.7

168

721

853

291

63.5

33.6

.107

.111

.148

.111

.172

.158

.417

1.79

2.12

.722

.158

.083

.12 

.12 

.17 

.13 

.18

.47

2.06

2.36

.83

.18|

.091

20 205 .509 6.71

2,040

6,400

6,600

6,640

10,300

35,800

71,400

22,700

8,480

7,390

49,100

107,000

36,700

14,200

2,250

217,000

17,100

62,100

88,100

27,000

10,600

205,000

5,400

12,000

52,900

44,300

16,200

6,400

137,000

4,100

25,110

18,420

4,950

1,420

1,340

55,340

2,660

2,370

3,670

2,760

3,850

3,920

10,100

44,360

50,740

17,910

3,910

2,000

148,500

t Figures for 1910-14 recomputed on basis of revised figure of drainage area.
PEND OREILLE RIVER BASIN 109

Skalkaho Creek near Hamilton, Mont.

Location.- Staff gage, lat. 46°10», long. 113°59t, In SMf aeo. 28, T. 5 N-, R. 19 W., 

at bridge on J. A. Brennan'a ranch., 9 miles southeast of Hamilton.

Records available.- April 1920 to September 1924.

Extremes.- Maximum discharge obaerved, 1,110 second-feet June 14, 1922 (gage height,

 3.80 feet)} minimum observed, 14 aecond-feet Mar. 26 to Apr. 5, 1924 igage height, 

1.30 feet).

Ranarks.- No dlveralons or regulation.

Monthly discharge of Skalkaho Creek near Hamilton, Mont.____________

Month .Discharge In second-feet

Maximum Minimum Wean

Run-off

In 

acre-feet

April 20-30........................ ........... 32

May........................................... 195

June.......................................... 520

July.......................................... 437

August........................................ 78

September..................................... 78

The period.................................

1920-21

October....................................... 60

November...................................... 60

December 1-8.................................. 36

March......................................... 31

April......................................... 47

May........................................... 755

June.......................................... 886

July.......................................... 210

August........................................ 74

Sept ember..................................... 60

1921-22

October....................................... 37

Novanber 1-17...".............................. 34

April......................................... 37

May........................................... 474

June.......................................... 1,070

July.......................................... 243

August........................................ 82

Sept ember..................................... 60

1922-23

October....................................... 37

April......................................... 69

May........................................... 437

June.......................................... 595

July.......................................... 363

August........................................ 100

September..................................... 47

1923-24

October....................................... 41

November...................................... 30

December 1-3.................................. 26

March 26-31................................... 14

Aprl1......................................... 32

May........................................... 462

June.......................................... 259

July.......................................... 103

August........................................ 48

Sept ember..................................... 26

27

30

152

78

42

37

28.7

114

375

191

57.6

42.5

36

34

32

27

28

50

226

74

47

37

34

32

27

37

243

89

47

37

32

30

47

236

100

47

37

30

26

26

14

14

48

103

48

26

21

42.7 

36.9 

32.8 

29.0 

39.4

342

524

123 

57.3

-44.9

36.0

33.4

31.7

171

652

149

62.0

43.8

34.8 

176* 39.2

412

191 

68.2 

41.5

28.4

26.0

14.0

21.7

268

175

73.0

35.4

25.1

626

7,010

22,300

11,700

3,540

2,530

47,700

2,630

2,200

520

1,780

2,340

21,000

31,200

7,560

3,520

2,670

2,210

1,130

1,890

10,500

38,800

9,160

3,810

2,610

2,140

2,330

10,800

24,500

11,700

4,190

2,470

2,070

1,690

155

167

1-,290

16,500

10,400

4,490

2,180

1,490

Blodgett Creek near Hamilton, Mont 

Location.- Wire-weight gage, lat. 46°17', long. 114°10', In sec. 12, T. 6 N-, R- 21 W., 

at highway bridge about lj miles upstream from mouth and 2j miles north of Hamilton.

Drainage area.- 29.2 square miles.

Records available.- April to September 1938.

Extremes.- Maximum discharge observed, 606 second-feet May 28, 29 (gage height, 3.45 

feet); minimum observed, 0.9 second-feet Aug. 1, 2 (gage height, 0.46 foot).

Remarks.- Many diversions above station for irrigation.

__________Monthly discharge of Blodgett Creek near HamlIt on. Mont.____________

Month

Discharge In second-feet

:aximum Minimum Mean

Run-off

in 

acre-feet

April 16-30... 

May...........

June..........

July..........

August........

September.....

The period.

492

606

369

76

1.2

1.3

24

55

85

1.0

.9

1.0

166

220

201

21.8

1.12

1.08

4,930

13,550

11,970

1,340

69

64

31,920

527283 0-43-8
110 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Willow Creek near Corvallis, Mont.

Location.- Staff gage, lat. 46°18', long. 114°00', in sec. 8, T- 6 N., R. 19 W., at

Wiley Ranch, 6 miles southeast of Corvallis. 

Records available.- April 1920 to May 1924.

Extremes-- Maximum discharge observed, 150 second-feet June 15, 1922 (gage height, 

 2.20 feet); minimum observed, 3.6 second-feet, Nov. 28 to Dec- 1, 1925, and

Mar.23-25,1924 (gage height, 0.52 foot). 

Remarks.- One small diversion above station for irrigation.

Monthly discharge of Willow Creek near Corvallis, Mont.

Month

1920

May ............................................

1920-21

July. ..........................................

1921-22

May. ...........................................

July. ..........................................

1922-25

July. ..........................................

1923-24

May 1-3 ........................................

Discharge in second-feet

Maximum

8.8 

25 

55 

58 

12 

9.4

_

8.9 

12.0 

6.4 

11 

71 

112 

56 

10 

7.9

7.1 

5.2 

9.5 

48 

125 

45 

18 

12

7-9 

6.4 

6.4 

7.1 

13 

21 

58 

52 

16 

9.3

7.1 

6.4 

5.7 

4-7 

5.2 

5.7

Minimum

7.8 

8.5 

14 

12 

9.4 

7.1

_

8.6 

7.1 

5.7 

5.7 

10 

57 

11 

6.8 

6.4

5.2 

4.7 

4.7 

10 

' 40 

15 

7.9 

7.1

6.4 

5.7 

5.7 

5.2 

5.2 

6.4 

17 

15 

9.3 

5.7

5.2 

5.6 

5.6 

5.6 

4.7 

5.2

Mean

8.26 

15.6 

35.9 

26.2 

10.5 

8.27

_

8.61 

8.55 

5.77 

8.15 

40.5 

71.0 

20.2 

8.94 

6.89

6.26 

4.88 

6.49 

34.7 

86.0 

26.0 

12.4 

8.59

6.61 

6.05 

6.10 

6.09 

6.97 

11.0 

42.5 

27.2 

13.1 

6.41

6.23 

4.85 

5.30 

4.00 

5.08 

5.57

Run- off 

in 

acre-feet

180 

959 

2,140 

1,610 

655 

492

6,010

529 

496 

555 

484 

2,490 

4,220 

1,240 

550 

410

585 

185 

586 

1,520 

5,120 

1,600 

762 

499

406 

559 

575 

169 

415 

676 

2,520 

1,670 

806 

581

385 

287 

526 

71.4 

502 

32.0

Willow Creek at Anfinson Ranch, near Corvallis, Mont.

Location.- Staff gage, lat. 46°18', long. 114°01«, in MW-J- sec. 7, T. 6 N., R. 19 W., at

Anrinson Ranch, 5 miles southeast of Corvallis. 

Records available.- April to September 1938- 

Extremes.- Maximum discharge observed, 73 second-feet June 19 (gage height, 2.28 feet);

mTnEnum observed, 0.1 second-foot Sept. 11. 

Remarks.- Many diversions above station for irrigationMonthly discharge of Willow Creek at Anfinson Ranch, near Corvallis, Mont.

Month

1958

July. ..........................................

Discharge in second-feet

Maximum

9.3 

61 

73 

40 

6.1 

1.3

-

Minimum

0.9 

.1 

57 

5.2 

1.4 

.1

-

Mean

4.89 

11.8 

49.3 

15.1 

3.28 

.54

-

Run-off 

in 

acre-feet

165 

728 

2,940 

928 

202 

20

4,980
PEND OREILLE RIVER BASIN 111

Bear Creek near Victor, Mont.

location.- Staff gage, lat. 46°23', long. 114 °13', In NEi sec. 9, T. 7 N., R. 21 W.,

5 mile's southwest of Victor. 

Records available.- April to September 1938. 

Extremes.- Maxim-urn discharge observed, 865 second-feet Apr. 18 (gage height, 3.45 feet,

rrom graph' based on gage readings); minimum observed, 2.9 second-feet Sept. 23,

26-28. 

Remarks.- No diversions above station.

Monthly discharge of Bear Creek near Victor, Hont.

Month

Discharge In second-feet

Maximum

Run-off

in 

acre-feet

April 15-30. 

May.........

June........

July........

August......

September. -

The period.

1938

588

650

433

141

11

7

33

89

156

12

5

198

256

287

54.9

7.9

4.2

6,300 

15,760 

17,090

3,370 

484

' 252

43,260

Burnt Pork Creek near Stevensvllle, Mont.

Location.- Staff gage, lat'. 46°28', long. 113°57', in SW-fc sec.. 11, T. 8 N., R. 19 W., at 

nlgnwa'y bridge at John Buck's ranch, 9 miles southeast of Stevensvllle.

Drainage area.- 74 square miles.

Records available.- May 1920 to August 1924.

Extremes.- Maximum discharge observed, 620 second-feet June 10, 1922 (gage height, 2.64 

feet)j minimum observed, 15 second-feet Mar. 22-25, 1923 and Aug. 23, 1924 (gage 

height, 0.48 foot).

Remarks.- Two small diversions above station.

Monthly discharge of Burnt Pork Creek near Stevensville, Mont.

Month

Discharge In second-feet

Maximum Minimum

Run-off

in 

acre-feet

1920 

May.........................

June........................

July........................

August......................

September...................

The period...............

1920-21 

October.....................

November....................

July 17-31..................

August 1-6..................

1921-22 

May 7-31....................

June........................

July........................

August 1-5..................

1922-23 

October 4-31................

November....................

December....................

March 22-31.................

April 1-21..................

May 27-31...................

June........................

July...................... ..

August......................

September...................

1924 

May 10-31...................

June........................

July........................

August 1-23.................

262

334

172

38

84

57

50

45

35

488

615

135

45

27

32

29

35

168

118

276

141

45

27

268

107

45

24

143

39

26

26

190

242

80.8

30.8

37.1

40

32

35

30

70

148

34

39

19

22

19

15

24

100

118

44

21

21

T.04 

45 

19 

15

.43.7

42.3

37.7

32.3

261

429

67.0

42.0

22.9

26.7

21.7

21.4

42.8

107

190

73.4

30.5

23.5

175

75.2

30.9

20.9

9,040

14,400

4,970

1,890

2,210

32,500

2,690

2,520

1,120

384

12,900

25,500

4,120

417

1,270

1,590

1,330

424

1,780

1,060

11,300

4,510

1,880

1,400

7,630

4,470

1,900

954
112 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Lolo Creek near Lolo, Mont.

Location.- Staff gage, lat. 46°45 T , long. 114°14', in sec. 34, T. 12 N., R. 21 W., at 

highway bridge at Anderson Ranch, 7 miles upstream from Lolo and mouth.

Drainage area.- 249 square miles.

Records available,- October 1911 to September 1915.

Extremes.- Maximum discharge observed, 2,500 second-feet May 28, 1913 (gage height, 5.2 

feet); minimum observed, 36 second-feet Mar. 20, 1912 (gage height, 1.64 feet).

Remarks.- Many small diversions above station for irrigation.

Monthly discharge of Lolo Creek near Lolo, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

36

36

33

68

36

164

442

675

148

72

72

85

.85

37

156

675

925

228

85

61

83.5

75.9

48.3

76.2

75.3

398

1,120

1,190

319

112

104

97.9

132

71.5

845

1,570

1,680

329

174

69.8

78

129

768

375

122

56

47

75.4 

82.5

e75

e70

e55

142

508 

1,160

706

247 

82.5 

80.2

274

108

137

122

60

196

315

471

130

85

82

142

157

128

89.2

550

419

611

194

104

114

5,130

4,520

2,970

3,780

1,790

23,700

68,900

70,800

19,600

6,890

6,190

6,020

7,860

4,400

36,900

96,500

100,000

20,200

10,700

4,150

1911-12

October........................................ 117

November....................................... 87

December....................................... 79

January........................................ -

February 5-29,.................................. 99

March 20-31 .................................... 106

April.......................................... 533

May............................................ 1,600

June........................................... 1,600

July............................................ 675

Augu/st......................................... 156

September...................................... 208

1912-13

October........................................ 106

November....................................... 254

December....................................... 106

April 9-30 ..................................... 1,500

May............................................ 2,500

June........................................... 2,300

July........................................... 698

August......................................... 235

September...................................... 85

October..............1.9.1.3.-.1.4..............;..... 85

November....................................... 99

December.......................................

 January........................................ _

February....................................... _

March.......................................... 186

April.......................................... 857

May............................................ 1,600

June........................................... 1,000

July........................................... 388

August......................................... 123

September...................................... 106

The year.................................... 1,600

October..............1.9.1.4.-.1.5.................... 180

November....................................... 195

December 1-6 ................................... 142

March 20-31 .................................... 137

April.......................................... 4Vi

May............................................ p67

June........................................... 840

July........................................... 479

August......................................... 144

September.-...................................... ___150

e Estimated.

St. Regis River near St. Regis, Mont.

Location.- Staff gage, lat. 47°18'> long. 115°10', In NEi sec. 28, T. 18 N., R. 28 W., at 

St. Regis ranger station, 3 miles upstream from town of St. Regis and mouth,

Drainage area.- 278 square miles.

.Records available.- October 1910 to September 1917,

Extremes.-. Maximum discharge observed, 7,740 second-feet May 28, 1917 (gage height, 8.65 

feet); minimum observed, 85 second-feet Aug. 30 to Sept, 2, 1915 (gage height, 1.75 

feet).

Remarks.- No diversion or regulation above station.

4,640

4,910

4,610

4,300

3,050

8,730

30,800

71,300

42,000

15,200

5,070

4,770

199,000

8,73C

9,340

1,520

2,120

20,800

25,800

36,400

11,900

6,400

6,780
PEND OREILLE RIVER BASIN 113

Monthly discharge of St. Regis River near St. Regia, Mont.

Month

Discharge in second-feet

Maximum Minimum square 

mile

Inches Acre-feet

1910-11 October............

November...........

December...........

March..............

April...............

May................

June ...............

July...............

August.............

September..........

1911-12 

October............

November 1-8.......

February 8-29......

March..............

April..............

May................

June...............

July...............

August.............

September..........

1912-13 

October............

March 16-31........

April..............

May................

June...............

July...............

August.............

September..........

1913-14 

October............

November...........

March 7-31.........

April..............

May................

June......... .....

July...............

August.............

September..........

1914-15 

October............

November...........

March 15-31........

April..............

May...............

June ...............

July...............

August.............

September 1-11....

1915-16 

October...........

November 21-30.....

December 1-11.....

April.............

May...............

August. ...........

September.........

1916-17 

October 1-14......

June..............

July..............

485

1,000

350

1,730

3,880

3,880

2,620

640

250

166

139

116

268

563

2,000

3,640

1,730

152

139

152

375

3,100

6,220

3,940

765

238

135

185

185

1,102

2,840

2,710

1,120

330

150

330

202

1,040

580

1,900

830

640

255

120

150

100

148

160

4,450

5,580

410

245

160

4,380

1,280

130

92

100

130

755

1,300

640

214

128

128

107

116

139

102

668

1,210

488

152

107

116

107

220

352

1,400

765

220

120

90

90

90

238

580

1,040

330

150

120

150

150

220

185

765

580

220

120

85

85

90

155

110

1,120

1,790

225

160

160

1,400

315

210

443

201

687

1,670

1,910

1,320

375

184

145

124

116

177

200

1,400

2,S80

1,070

266

123

132

131

S75 

1,740 

3,270 

1,760

401

174

108

123

162

629

1,750

1,900

617

229

145

204

175

590

422

1,130

671

388

190

110

109

91.0

137

129

2,060

2,840

313

192

160

2,550

0.755

1.59

.723

2.47

6.01

6.87

4.75

1.35

.662

.522

.446

.417

.637

.719

5.04

8.20

3.85

.957

.442

.475

.471 

.98! 

6.26 

11.8 

6.33 

1.44 

.626 

.388

.44! 

,585 

2.26 

6.29 

6.83 

2.22 

.824 

.52: 

.734

.629

2.12

1.52

4.06

2.41

1.40

.683

.396

.392

.327

.493

.464

7.41

10.2

1.13

.691

.575

9.17

2,40

0.87

1.77

.83

2.85

6.70

7.92

5.30

1.56

.76

.58

.51

.12

,52

.83

5.62

9.45

4.30

1.10

.51

.53

.54

.59

6.98

13.60

7.06

1.66

.72

.43

.51

,65

2.10

7.02

7.87

2.48

.95

.60

.82

.73

2.36

.96

4.53

2.78

1.56

.79

.46

.16

.38

.18

.19

8.27

11.8

1.30

.77

.30

10.2

2.77

12,900

26,400

12 ,400

42,200

99,400

117,000

78,600

23,100

11,300

8,630

7,620

1,840

7,720

12,300

83,300

140,000

63,700

16,400

7,560

7,860

8,060

8,730

104,000

201,000

105,000

24,700

10,700

6,430

7,560

9,640

31,200

104,000

117,000

36,700

14,100

8,920

12,100

10,800

35,100

14,200

67,200

41,300

23,100

11,700

6,760

2,380

5,600

2,720

2,810

123,000

175,000

19,200

11,400

4,440

152,000

41,100

Plathead River at Plathead, British Columbia 

(Published as Flathead River near Trail Creek, Mont., prior to 1935)

(International gaging station)

Location.- Staff gage, lat, 49°00', long. 114°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. 

Records available.- March 1929 to September 1938. 

Extremes.- MaxStum discharge observed, 10,600 second-feet June 17, 1933 (gage height,

6.90 feet); minimum observed, 65 second-feet Apr. 9, 1929 (gage height, 0.76 foot). 

Remarks.- No diversion or regulation. This is one of the international gaging stations

maintained by Canada under agreement with the United Statee.
114 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Flathead River at Plathead, British Columbia

Month

1929

April.........................

May...........................

1929-30

April .........................

1930-31

April.........................

1931-.32

May...........................

1932-33

July..........................

1933-34

May...........................

1934-35

April.........................

1935-36

May...........................

Discharge In second- feet

Maximum

187 

1,070 

7,750 

6,300 

1,120 

392 

263

-

194 

157 

296 

2,580 

4,560 

3,780 

972 

387 

244

182 

173 

1,280 

5,140 

2,420 

563 

258 

197

160 

236 

1,380 

8,030 

6,520 

1,640 

493 

352

452 

535 

465 

2,420 

7,820 

10,100 

2,340 

£66 

356

3,710 

1,380 

581 

6,560 

6,860 

3,910 

983 

379 

208

208 

1,230 

403 

914 

7,750 

6,170 

2,150 

566 

270

224 

194 

141 

2,790 

6,270 

3,850 

633 

256 

1fl6

Minimum

100 

109 

670 

1,230 

387 

223 

191

-

161 

140 

291 

301 

1,580 

1,070 

392 

227 

187

170 

160 

118 

1,450 

637 

240 

150 

140

138 

138 

307 

964 

1,750 

507 

307 

212

188 

276 

452 

168 

1,530 

2,500 

595 

324 

286

282 

545 

416 

368 

3,400 

1,000 

390 

212 

182

170 

192 

246 

170 

906 

2,030 

581 

274 

201

186 

141 

126 

240 

2,220 

686 

256 

182 

153

Mean

142 

275 

2,600 

2,970 

661 

296 

215

-

178 

146 

294 

1,130 

2,420 

2,120 

622 

289 

208

176 

166 

318 

2,440 

1,190 

387 

188 

164

147 

186 

756 

4,050 

3,680 

892 

394 

261

301 

401 

460 

534 

3,140 

5,480 

1,270 

423 

318

757 

707 

506 

2,960 

4,840 

1,980 

603 

275 

192

181 

574 

294 

356 

3,250 

3,690 

1,100 

374 

230

198 

174 

134 

1,080 

3,630 

1,420 

406 

220 

175

Per 

square 

mile

0.316 

.611 

5.91 

6.60 

1.47 

.658 

.478

-

.396 

.324 

.653 

2.51 

5.38 

4.71 

1.38 

.642 

.462

.39 

.37 

.71 

5.42 

2.64 

.86 

.42 

.36

.33 

.41 

1.68 

9.00 

8.18 

1.98 

.88 

.58

.669 

.891 

1.02 

1.19 

6.98 

12-.2 

2.82 

.940 

.707

1.68 

1.57 

1.12 

6.58 

10.76 

4.40 

1.34 

.61 

.43

.40 

1.28 

.65 

.79 

7,22 

8.20 

2.44 

.83 

.51

.44 

.39 

.30 

2.40 

8.07 

3.16 

.90 

.49 

.39

Run- off

Inches

0.11 

.68 

6.81 

7.36 

1.70 

.76 

.53

-

.46 

.10 

.05 

2.80 

6.20 

5.26 

1.59 

.74 

,52

.45 

.15 

.79 

6.25 

2.94 

.99 

.48 

.40

.38 

.32 

1.87 

10,38 

9,13 

2.28 

1.01 

,65

.77 

.99 

,15 

1.33 

8.05 

13.61 

3.25 

1.08 

.79

1.94 

1.75 

.42 

7.34 

12.41 

4.91 

1.54 

.70 

.48

.46 

1.43 

.44 

.88 

8.32 

9.15 

2.81 

.96 

.57

.51 

.44

.35 

2,68 

9.30 

3.53 

1.04 

.56 

.44

Acre-feet

2,540 

16,400 

164,000 

177 ,000 

40,600 

18 ,200 

12,800

432,000

10,900 

2,320 

1,170 

67,200 

149,000 

126,000 

38,200 

17 ,800 

12,400

10,800 

3,620 

18,900 

150,000 

70,800 

23,800 

11,600 

9,7,60

9,040 

7,750 

45,000 

249,000 

219,000 

54,800 

24,200 

15,500

18,500 

23,900 

3,650 

31,800 

193,000 

326 ,000 

78 ,100 

26,000 

18,900

46,500 

42,100 

10,000 

176,000 

298,000 

118,000 

37,100 

16 ,900 

11,400

11,100 

34,200 

10,500 

21,200 

200,000 

220,000 

67,600 

23,000 

13,700

12,200 

10,300 

8,230 

64,500 

223,000 

84,500 

25,000 

13,500 

10,400
PEND OREILLE RIVER BASIN 115

Monthly discharge of Flathead River at Flathead, British Columbia Continued

Month

1936-37 October. ......................

May...........................

1937-38

Discharge in second-feet

Maximum

153 

141 

132 

1,060 

5,240 

3,890 

1,130 

450 

236

1,030 

628 

5,330 

8,960 

6,100 

1,640 

534 

280

Minimum

128 

110 

115 

80 

1,440 

1,250 

378 

240 

165

186 

370 

190 

1,610 

1,690 

548 

280 

208

Mean

138 

124 

122 

299 

3,110 

2,210 

654 

308 

183

273 

452 

1,720 

4,340 

3,800 

931 

383 

249

Per 

square 

mile

0.31 

.28 

.27 

.66 

6.91 

4.91 

1.46 

,68 

.41

.61 

1.00 

3.82 

9.64 

8.44 

2.07 

.85 

.55

Run-off

Inches

0.36 

.31 

.04 

.7* 

7.97 

5.48 

1.67 

.78 

.46

.70 

1.12 

4.26 

11.11 

9.42 

2.39 

' .98 

61

Acre-feet

8,480 

7,370 

971 

17,800 

191,000 

131,000 

40,200 

18,900 

10,900

16,800 

26,900 

102,000 

267,000 

226,000 

57,200 

23,500 

14,800

Plathead River near Columbia Falls, Mont.

Location.- Water-stage recorder, lat. 48°29.', long. 114°05', In NWj sec. 7, T. 31 N., R. 

19 W., at Potter Ranch, three-quarters of a mile upstream from Middle Pork and 10 

miles northeast of Columbia Falls. Records for period 1910-17, obtained on staff 

gage, 1,000 feet downstream from present site at different datum.

Drainage area.- 1,620 square miles.

Records available.- September 1910 to September 1917, April 1929 to September 1938.

Extremes.- Maximum discharge, 29,500 second-feet June 20; 1916 (gage height, 3.8 feet, 

site and datum then in use); minimum, 340 second-feet Janurary 26-31, 1936, ice 

present.

Remarks.- No diversion or regulation.

Monthly discharge of Flathead River near Columbia Palls, Mont.

Month

1910

1910-11

M eh *

The year ...................

1911-12

a Partly estimated, 

e Estimated.

Discharge in second-feet

Maximum

1,030

3,890 

5,400 

1,510 

1,450 

1,100 

1,560 

7,650 

9,600 

13,100 

7,920 

2,480 

1,910

13,100

1,340 

1,050 

1,140

870 

3,690 

10,700 

8,480 

5,370 

2,480 

1,910

10,700

Minimum

925

1,300 

1,400 

950 

510 

710 

640 

1,290 

4,710 

7,920 

2,330 

1,240 

1,240

510

710 

350 

510

450 

540 

3,320 

4,290 

2,480 

1,340 

1,140

-

Mean

974

2,220 

2,310 

1,120 

1,050 

917 

983 

3,080 

6,960 

10,800 

4,290 

1,870 

1,550

3,100

1,020 

764 

774 

e762 

a657 

632 

2,510 

7,230 

6,440 

3,930 

1,700 

1,510

2,?30

Per 

square 

mile

0.601

1.37 

1.43 

.692 

.648 

.566 

.607 

1.90 

4.30 

6.67 

2.65 

1.15 

.957

1.91

.630" 

.472 

.478 

.470 

.406 

.390 

1.55 

4.46 

3.98 

2.43 

1.05 

.932

1.44

Run- off

Inches

0.19

1.58 

1.60 

.80 

.75 

.59 

.70 

2.12 

4.96 

7.44 

3.06 

1.33 

1.07

26.00

.73 

.53 

.55 

.54 

.44 

.45 

1.73 

5.14 

4.44 

2.80 

1.21 

1.04

IS. 60

Acre -feet

17,000

136,000 

137,000 

68,900 

64,600 

50,900 

60,400 

183,000 

428,000 

643,000 

264,000 

115,000 

92,200

2,240,000

62, 700 

45,500 

47,600 

46,900 

37,800 

38,900 

149,000 

445,000 

383,000 

242,000 

105,000 

89,800

1,690,000
116 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Flathead River near Columbia Palls, Mont.- Continued

Month

1912-15

July. .........................

The

1913-14

April.........................

July..........................

September .....................

1914-15

April.........................

The year ...................

1915-16

April.........................

May

1916-17

April.........................

July..........................

Discharge In second-feet

Maximum

1,450 

1,910 

1,140

7,000 

20,800 

23,800 

8,880 

2,800 

1,500

23,800

1,670 

1,240 

960 

1,340 

790 

790 

5,280 

12,400 

13,300 

4,840 

1,850 

1,910

13,300

4,040 

4,840 

1,560 

1,140 

960 

1,100 

7,300 

7,600 

8,200 

6,220 

2,330 

1,340

8,200

1,730 

1,290 

850

3,080 

6,220 

12,300 

29,500 

21,800 

3,700 

3,620

29,500

1,390 

1,010 

1,010 

1,100 

1,100 

1,010 

1,860 

18,200 

24,300 

11,900 

2,520 

1,190

24,300

Minimum

960 

1,050 

640

710 

3,140 

8,880 

2,640 

1,500 

960

-

960 

960 

570 

570 

350 

510 

790 

4,620 

4,840 

1,730 

1,240 

1,140

350

1,560 

1,790 

960 

790 

710 

640 

1,140 

3,860 

3,860 

2,330 

1,240 

1,140

640

1,100 

700 

630

1,240 

2,000 

4,840 

6,480 

3,700 

2,070 

1,440

_

930 

510 

570 

770 

700 

810 

850 

' 1,500 

9,940 

2,750 

1,190 

930

510

Mean

1,200 

1,390

Ctc A

e650 

e650 

e650 

2,960 

8,580 

14,900 

4,390 

2,050 

1,300

3,300

1,210 

1,100 

809 

901 

623 

647 

3,110 

8,730 

7,380 

3,190 

1,470 

1,380

2,550

2,280 

2,940 

1,190 

939 

804 

803 

3,780 

5,540 

4,960 

3,540 

1,680 

1,190

2,460

1,370 

1,110 

696 

e600 

e800 

2,060 

3,660 

7,030 

16,800 

11,100 

2,930 

2,480

4,220

1,090 

874 

776 

al,000 

a900 

873 

1,130 

9,950 

16,200 

6,550 

1,660 

1,000

3,510

Per 

square 

mile

0.741 

.858 

.527 

.401 

.401 

.401 

1.83 

5.30 

9.20 

2.71 

1.27 

.802

2.04

.747 

.679 

.499 

.556 

.385 

.399 

1.92 

5.38 

4.56 

1.97 

.907 

.852

1.57

1.41 

1.81 

.755 

.580 

.496 

.496 

2.33 

3.50 

3.06 

2.19 

1.04 

.735

1.52

.846 

.685 

.430 

.370 

.494 

1.27 

2.26 

4.34 

10.4 

6.85 

1.81 

1.53

2.60

.673 

.540 

.479 

.617 

.555 

.539 

.698 

6.14 

10.0 

4.04 

1.02 

.617

2.17

Run- off

Inches

0.85 

.96 

.61 

.46 

.42 

.46 

2.04 

6.11 

10.26 

3.12 

1.46 

.89

27,64

.86 

.76 

.58 

.64 

.40 

.46 

2.14 

6.20 

5.09 

2.27 

1.05 

.95

21.40

1.63 

2.02 

.85 

.67 

.52 

.57 

2.60 

3.80 

3.41 

2.52 

1.20 

.82

20.61

.98 

.76 

.50 

.43 

.53 

1.46 

2.52 

5.00 

11.6 

7.90 

2.09 

1,71

35.48

.78 

.60 

.55 

.71 

.58 

.62 

.78 

7.08 

11.2 

4.66 

1.18 

. .69

£9.43

Acre-feet

73,800 

82,700 

52,500 

40,000 

36,100 

40,000 

176,000 

528,000 

887,000 

270,000 

126,000 

77,400

2,390,000

74,400 

65,500 

49,700 

55,400 

34,600 

39,800 

185,000 

537,000 

439,000 

196,000 

90,400 

82,100

1,850,000

140,000 

175,000 

73,200 

57,700 

44,700 

49,400 

225,000 

328,000 

295,000 

218,000. 

103,000 

70,800

1,780,000

84,200 

66,000 

42,800 

36,900 

46,000 

127,000 

218,000 

432,000 

1,000,000 

682,000 

180,000 

148,000

3,060,000

67,QOO 

52,000 

47,700 

61,500 

50,000 

53,700 

67,200 

612,000 

964,000 

403,000 

102,000 

59,500

2,540,000

a Partly estimated, 

e Estimated.
PEND OREILLE RIVER BASIN 117

Monthly discharge of Flathead RJTer near Columbia Falls , Moat. Continued

Month

Discharge in second-feet

Maximum Minimum Mean square 

mile

Inches Acre-feet

1929

April 9-30.........

May................

June...............

July...............

August 1-10........

1930 

May................

June...............

July...............

August.............

September..........

The period......

1930-31 

October.............

November...........

December........'...

January............

February...........

March..............

April........... ...

May................

June...............

July 1-8...........

The period......

1931-32 

October 14-23......

November 24-30.....

December...........

January............

February...........

March..............

April..............

May. .....*..........

June...............

July 1-9...........

August 6-31........

September..........

1932-33 

October 1-26.......

December 2-7.......

February S4-28.....

April 12-86........

May 3-31...........

June 1-27..........

July 17-23.........

1934 

April 20-30........

May................

June................

July...............

August.............

September..........

The period......

1934-S5 

October............

November...........

December...........

January............

February...........

March 14-21........

May 15-31..........

June...............

July...............

August.............

September..........

4,800

19,400

15,400

4,420

1,520

655

3,740

4,420

1,520

1,200

1,970

8,310

9,380

2,690

1,360

1.22

5.13

5.79

1.66

.840

1.00

5.91

6.46

1.91

.31

11,200

10,800

3,740

5,000

3,980

935

898

7,110

6,760

2,720

1,410

923

4.39

4.17

1.68

.870

.570

5.06

4.65

1.94

1.00

.64

1,150

795

708

655

1,200

14,700

8,110

2,880

680

608

510

482

592

1,060

5,100

3,000

2,080

876

677

562

561

614

729

2,520

8,810

4,820

2,420

.541

.418

.347

.346

.379

.450

1.56

5.44

2.98

1.49

.62

.47

.40

.40

.39

.52

1.74

6.27

3.32

.44

635

556

675

472

3,980

3,980

6,320

19,900

17,000

7,300

1,650

1,230

1,170

2,240

770

6,560

18,200

24,000

5,210

569

492

418

390

400

1,020

1,540

4,240

7,830

4,520

1,180

732

745

1,760

745

1,000

7,560

12,900

3,650

602

518

527

421

760

1,510

3,970

12,000

12,400

6,030

1,430

908

2,060

760

2,280

10,000

17,700

4,460

.372

.320

.325

.260

.469

.932

2.45

7.41

7.65

3.72

.883

.559

.560

1.27

.469

1.41

6.17

10.9

2.75

.14

.08

.37

.30

.51

1.07

2.73

8.54

8.54

1.38

.85

.62

.54

.28

.09

.78

6.65

10.94

.72

19,000

18,200

13,200

3,820

1,560

970

11,800

11,200

3,900

1,610

940

16,950

14,680

7,287

2,475

1,186

758

10.5

9.06

4.50

1.53

.732

.468

4.29

10.44

5.02

1.76

.84

.52

1,100

4,240

1,340

1,930

1,560

1,000

20,300

15,000

7,830

2,300

1,070

722

880

680

910

6,320

7,560

2,400

1,070

822

792

2,010

1,018

1,037

1,011

959

13,300

11,690

4,592

1,498

936

.600

1.24

.628

.640

.624

.592

8.21

7.22

2.83

.925

.578

.69

1.38

.72

.74

.65

.18

5.19

8.06

3.26

1.07

.64

86,000

511,000

558,000

165,000

27,000

437,000

402,000

167,000

86,700

54,900

1,150,000

53,900

40,300

34,600

34,500

34,100

44,800

150,000

542,000

287,000

38,400

1,260,000

11,900

7,190

32,400

25,900

43,700

92,800

236,000

738,000

738,000

108,000

73,700

53,900

46,800

24,500

7,540

67,800

575,000

948,000

61,900

369,700

902,900

433,600

152,200

72,950

45,120

1,976,000

48,700

119,600

62,590

63,790

56,160

15,210

448,300

695,800

282,400

92,090

55,720
118 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Plathead River near Columbia Palls, Mont. Continued

Month

1935-36

1936-37

The year ...................

1937-38

May...........................

July..........................

Discharge in second-feet

Maximum

880 

795

18,200 

13,600 

2,600 

1,120 

832

18,200

550 

483 

615

418 

560 

3,900 

13,600 

11,500 

5,640 

1,700 

810

13,600

1,740 

1,650 

1,160 

1,160 

761 

1,080 

12,800 

23,500 

17,800 

7,200 

1,790 

1,160

23,500

Minimum

620

7,560 

2,800 

1,120 

688 

555

-

483

348 

397 

4,420 

5,000 

1,470 

840 

639

-

675 

984 

465 

384 

404 

576 

761 

6,090 

7,400 

1,840 

1,080 

754

384

Mean

779 

628 

394 

398 

400 

554 

5,619 

12,130 

5,496 

1,687 

898 

668

2,475

518 

420 

416 

325 

377 

435 

1,374 

9,039 

8,422 

2,760 

1,185 

708

2,173

814 

1,234 

713 

757 

618 

766 

4,562 

11,910 

12,360 

3,935 

1,364 

933

3,337

Per 

square 

mile

0.481 

.388 

.243 

.246 

.247 

.342 

3.47 

7.49 

3.39 

1.04 

.554 

.412

1.53

.320 

.259 

.257 

.201 

.233 

.269 

.848 

5.58 

5.20 

1.71 

.731 

.437

1.34

.502 

.762 

.440 

.467 

.381 

.473 

2.82 

7.35 

7.63 

2.43 

.842 

.576

2.06

Run- off

Inches

0.55 

.43 

.28 

.28 

.27 

.39 

3.87 

8.64 

3.78 

1.20 

.64 

.46

20.79

.37 

' .29 

.30 

.23 

.24 

.31 

.95 

6.43 

5.80 

1.97 

.84 

.49

18.22

.58 

.85 

.51 

.54 

.40 

.55 

3.15 

8.47 

8.51 

2.80 

.97 

.64

27.97

Acre-feet

47,900 

37,360 

24,250 

24,480 

23,010 

34,090 

334,400 

745,800 

327,100 

103,700 

55,230 

39,760

1,797,000

31,860 

25,000 

25,610 

19,980 

20,930 

26,720 

81,730 

555,800 

501,100 

169,700 

72,850 

42,100

1,573,000

50,070 

73,460 

43,820 

46,520 

34,350 

47,110 

271,400 

732,300 

735,300 

241,900 

83,840 

55,500

2,416,000

Yearly discharge of Plathead River near Columbia Palls, Mont.

Year

1911...........

T QT O

T QT "*> 

1915...........

1916...........

 t Q-\ Tf

T Q^fi

Tear ending Sept. 30

Discharge in 

second-feet

Mean

3,100 

2,330 

3,300 

2,550 

2,460

4,220 

3,510 

2,475 

2,173 

3,337

4,220 

2,946 

2,173

Per 

square 

mile

1.91 

1.44 

2.04 

1.57 

1.52

2.60 

2.17 

1.53 

1.34 

2.06

2.60 

1.82 

1.34

Run- off

Inches

26.00 

19.60 

27.64 

21.40 

20.61

35.48 

29.43 

20.79 

18.22 

27.97

35.48 

24.71 

18.22

Acre-feet

2,240,000 

1,690,000 

2,390,000 

1,850,000 

1,780,000

3,060,000 

2,540,000 

1,797,000 

1,573,000 

2,416,000

3,060,000 

2,134,000 

1,573,000

Calendar year

Discharge in 

second-feet

Mean

2,840 

2,410 

3,270 

2,830 

2,190

4, ISO

2,438 

2,291

4,180 

2,806 

2,190

Per 

square 

mile

1.75 

1.49 

2.02 

1.75 

1.35

2.58

1.50 

1.41

2.58 

1.73 

1.35

Run- off

Inches

23.83 

.20.21 

27.42 

23.70 

18.35

35.17

20.49 

19.20

35.17 

23.55 

18.35

Acre-feet

2,060,000 

1,750,000 

2,570,000 

2,050,000 

1,580,000

3,040,000

1,770,000 

1,658,000

3,040,000 

2,035,000 

1,580,000
PEND OREILLE RIVER BASIN 119

Flathead River at Columbia Palls, Mont.

Location.- Water-stage recorder, lat. 48°22', long. 114°ll f , In SWf sec. 17, T. 30 H., R. 

20 W., at Columbia Palls, 200 feet downstream from highway bridge on Roosevelt Highway. Zero of gage is 2,798.00 feet above mean sea level, adjustment of 1929 (levels 

by Corps of Engineers, U. S. Army).

Drainage area.- 4,440 square miles.

Records available.- May 1922 to September 1923, June 1928 to September 1938.

Extremes.- Maximum discharge, 102,000 second-feet June 1, 1923 (gage height, 17.3 feet)} 

minimum, 798 second-feet Dec. 8, 1929 (gage height, -0.08 foot).

Remarks.- No diversion or regulation.

Monthly discharge of Plathead River at Columbia Falls, Mont.

Month

Discharge in second-feet

Maximum Minimum square 

mile

Run-off

Inches Acre-feet

1922 

May 14-30...........

June 4-30 .........

July...............

August 1-25 .......

1928 

June 25-30. .......

July...............

August.............

September..........

The period.... ..,

1928-29 

October.............

November............

December...........

January............

February............

March...............

April..............

May.................

June................

July...............

August.............

September...........

The year.........

1929-30 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1930-31 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

77,400

82,200

15,300

4,000

26,100

15,900

4,110

2,680

53,500

38,900

7,850

3,460

12.0

8.76

1.77

.779

7.58

8.80

2.04

.72

1,800-iOOO

2,010,000

483,000

172,000

38,200

39,700

8,210

3,360

34,000

8,820

3,510

2,170

35,600

18,900

4,980

2,800

8.02

4.26

1.12

.631

1.79

4.91

1.29

.70

427,000

1,160,000

306,000

167,000

2,060,000

5,680

3,810

2,540

. 2,010

1,610

3,140

17,400

67,800

47,300

14,700

4,270

2,540

2,250

2,470

1,610

1,410

1,410

1,660

2,260

12,500

15,800

4,360

2,400

1,660

3,880

2,880

2,010

1,720

1,530

1,930

5,450

29,000

29,000

7,970

3,150

1,970

. 74 

.649 

.453 

.387 

.345 

.435 

1.23 

6.52 

6.52 

1.79 

.709 

.444

1.01

.72

.52

.45

.36

.50

1.37

7.52

7.27

2.06

.82

.50

67,800 1,410 7,560 1.70 23.10

1,720

1,460

2,010

1,720

2,910

3,060

35,200

38,000

34,500

10,800

3,810

2,470

1,410

1,070

864

1,110

1,070

1,030

3,380

15,800

11,400

3,900

2,070

1,890

1,600

1,290

1,320

1,340

1,670

1,620

20,100

24,300

20,600

6,780

2,840

2,110

.360 

.291 

'.297 

.302 

.376 

.365 

4.53 

4.57 

4.64 

1.53 

.640 

.475

.42

.32

.34

.35

.39

.42

5.05

6.31

5.18

1.76

.74

.53

38,000 864 7,130 1.61 21.81

3,810

3,380

2,330

2,760

2,470

4,560

20,100

58,600

29,300

7,250

3,300

2,840

1,950

1,890

1,320

1,320

1,780

1,780

3,300

18,300

7,790

3,060

1,780

1,610

2,580

2,530

1,800

1,710

2,090

2,670

8,040

30,400

15,700

4,690

2,300

2,250

.581

.570

.406

.385

.471

.601

1.81

6.85

3.54

1.06

.518

.507

.67

.64

.47

.44

.49

.69

2.02

7.90

3.95

1.22

.60

.57

239,000

171,000

124,000

106,000

85,000

119,000

324,000

1,780,000

1,730,000

490,000

194,000

117,000

5,480,000

98,400

76,800

81,200

82,400

92,800

99,600

1,200,000

1,490,000

1,230,000

417,000

175,000

126,000

5,170,000

159,000

151,000

111,000

105,000

116,000

164,000

478,000

1,870,000

934,000

288,000

141,000

134,000

58,600 1,320 6,420 1.45 19.66 4,650,000
120 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Plathead River at Columbia Palls, Mont. Continued

Month

1931-32

1932-33

May...........................

July..........................

September .....................

1933-34

Mar. ..... .....................

1934-35

May...........................

The year ...................

1935-36

The year ...................

Discharge in second- feet

Maximum

2,330 

3,550 

2,200 

1,600 

17,000 

13,200 

23,800 

84,100 

52,400 

21,800 

5,520 

3,550

84,100

3,460 

9,840 

10,200 

3,220 

2,140 

2,680 

40,500 

66,700 

88,600 

32,000 

6,990 

3,900

88,600

33,200 

21,800 

23,200 

12,100 

5,750 

10,500 

'58,600 

56,200 

33,800 

10,800 

4,080 

2,200

58,600

5,990 

13,900 

3,990 

9,230 

5,180 

3,900 

17,400 

67,800 

54,800 

20,900 

5,870 

2,680

67,800

1,780 

1,720 

1,280 

1,360 

1,540 

1,880 

38,400 

67,800 

51,100 

8,350 

3,190 

2,190

67,800

Minimum

1,660 

1,410 

1,510 

1,110 

1,150 

3,990 

5,990 

17,100 

23,800 

5,750 

3,380 

2,200

1,110

1,950 

3,060 

2,980 

1,510 

1,720 

1,890 

2,760 

18,100 

35,100 

7,250 

3,380 

2,760

1,510

2,840 

6,990 

5,400 

4,860 

3,720 

3,900 

8,350 

32,000 

11,400 

4,180 

2,200 

1,660

1,660

1,510 

3,810 

1,950 

1,610 

2,330 

2,070 

2,260 

15,800 

20,900 

6,110 

2,680 

1,780

1,510

1,410 

1,280 

941 

899 

983 

1,170 

1,120 

28,100 

8,930 

3,260 

1,940 

1,500

899

Mean

1,920 

2,270 

1,820 

1,340

a, 990

5,510 

14,300 

42,400 

37,600 

11,300 

4,170 

2,680

10,700

2,640 

5,220 

4,610 

2,300 

1,880 

2,100 

10,300 

30,500 

61,900 

16,800 

4,890 

3,210

12,200

8,117 

11,050 

9,035 

7,264 

5,103 

6,698 

32,210 

43,350 

20,050 

6,754 

2,924 

. 1,909

12, .900

2,254 

6,722 

2,892 

3,484 

3,355 

2,816 

7,227 

34,030 

34,910 

11,990 

3,845 

2,210

9,662

1,657 

1,446 

1,113 

1,132 

1,171 

1,629 

16,680 

43,130 

19,410 

5,180 

2,510 

1,790

8,089

Per 

square 

mile

0.432 

.511 

.410 

.302 

.673 

1.24 

3.22 

9.55 

8.47 

2.54 

.939 

.604

2.41

.595 

1.18 

1.04 

.518 

.423 

.473 

2.32 

6.87 

13.9 

3.78 

1.10 

.723

2.75

1.83 

2.49 

2.03 

1.64 

1.15 

1.51 

7.25 

9.76 

4.52 

1.52 

.659 

.430

2.91

.508 

1.51 

.651 

.785 

.756 

.634 

1.63 

7.66 

7.86 

2.70 

.866 

.498

2.18

.373 

.326 

.251 

.255 

.264 

.367 

3.76 

9.71 

4.37 

1.17 

.565 

.403

1.82

Run- off

Inches

0.50 

.57 

.47 

.35 

.73 

1.43 

3.59 

11.0 

9.45 

2.93 

1.08 

.67

32.77

.69 

1.32 

1.20 

.60 

.44 

.55 

2.59 

7.92 

15.5 

4.36 

1.27 

.81

37.25

2.11 

2.78 

2.34 

1.89 

1.20 

1.74 

8.09 

11.25 

5.04 

1.75 

.76 

.48

39.43

.59

1.68 

.75 

.90 

.79 

.73 

1.82 

8.83 

8.77 

3.11 

1.00 

.56

29.53

.43 

.36 

.29 

.29 

.28 

.42 

4.20 

11.20 

4.88 

1.35 

.65 

.45

24.80

Acre-feet

118,000 

135,000 

112,000 

82,400 

172,000 

339,000 

851,000 

2,610,000 

2,240,000 

695,000 

256,000 

159,000

7,770,000

162,000 

311,000 

283,000 

141,000 

104,000 

129,000 

613,000 

1,880,000 

3,680,000 

1,030,000 

301,000 

191,000

8,820,000

499,100 

657,500 

555,500 

446,600 

283,400 

411,800 

1,916,000 

2,665,000 

1,193,000 

415,300 

179,800 

113,600

9,337,000

138,600 

400,000 

177,800 

214,200 

186,300 

173, ?00 

430,000 

2,092,000 

2,077,000 

737,000 

236,400 

131,500

6,994,000

101,900 

86,020 

68,440 

69,630 

67,3PO 

100,100 

992,700 

2,652,000 

1,155,000 

318,500 

154,300 

106,500

5,872,000
PEND OREILLE RIVER BASIN 121

Monthly discharge of Flathead River at Columbia Palls, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Per 

square 

mile

Inches Acre-feet

1936-37 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

Septamber..........

The year........

1937-38 

October............

Hovember...........

December...........

January............

February...........

March,.............

April..............

May................

June...............

July...............

August..............

September..........

The year.. .....

1,530

1,370

1,810

990

958

1,280

14,700

45,300

37,700

17,400

4,460

2,070

1,350

998

950

850

850

926

1,440

15,000

17,000

3,990

2,070

1,660

1,431

1,182

1,178

928

905

1,083

5,028

30,580

27,370

8,145

3,055

1,829

0.322

.266

.265

.209

.204

.244

1.13

6.89

6.16

1.83

.688

.412

0.37

.30

.31

.24

.21

.28

1.26

7.94

6.87

2.11

.79

.46

45,300 850 1.56 21,14

3,460

3,460

3,220

3,720

2,760

3,460

53,900

69,600

52,900

17,200

4,620

2,680

1,760

2,610

1,440

1,700

1,750

1,870

2,610

16,400

18,400

4,810

2,680

1,980

2,012

3,027

2,332

2,501

2,180

2,481

15,190

35,100

32,610

9,629

3,453

2,273

.453

.682

.525

.563

.491

.559

3.42

7.91

7.34

2.17

.778

.512

.52

.76

.61

.65

.51

.64

3.82

9.12

8.19

2.50

.90

.57

88,010

70,350

72,420

57,070

50,260

66,950

299,200

,880,000

,628,000

500,800

187,800

108,800

5,009,000

123,700

180,100

143,400

153,800

121,100

152,500

903,700

2,158,000

1,941,000

592,100

212,300

135,500

1,440 9,416 2.12 28.79 6,817,000

Yearly discharge of Flathead River at Columbia Falls, Mont.

Year

Year ending Sept. 50

Discharge in 

second-feet

Mean

Per 

square 

mile

Acre-feet

Calendar year

Discharge in 

second-feet

Mean square 

mile

Acre-feet

1929.

1930.

1931.

1932.

1955.

7,560

7,130

6,420

10,700

12.200

1.70

1.61

1.45

2.41

2.75

23.10

21.81

19.66

32.77

57.25

5,480,000

5,170,000

4,650,000

7,770,000

8.820.000

7,180

7,370

6,350

11,200

15.500

1.62

1.66

1.43

2.52

5.04

21.95

22.51

19.42

54.44

41.27

5,200,000

5,350,000

4,600,000

8,160,000

9.780.000

1954.

1935.

1936.

1957.

1938.

Highest. 

Average. 

Lowe's t..

12,900

9,662

8,089

6,920

9,416

2.91

2.18

1.82

1.56

2.12

39.43

29.53

24.80

21.14

28.79

9,537,000

6,994,000

5,872,000

5,009,000

6,817,000

11,520

9,026

8,054

7,219

2.59

2.03

1.81

1.65

55.22

27.59

24.70

22.05

8,341,000

6,534,000

5,847,000

5,226,000

12,900 

6,420 

'9,100

2.91

1.45

2.05

39.43

19.66

27.83

9,537,000

4,650,000

6,592,000

13,500

6,350

9,047

5.04

1.45

2.04

41.27

19.42

27.68

9,780,000 

4,600-,000 

6,558,000

Flathead River near Poison, Mont.

Location.- Water-stage recorder, lat. 47°59', long. 114°20«, in sec. 19, T. 22 N., R. 21

'W., at highway bridge at Norrlsvale, 12 miles downstream from Poison. 

Drainage area.- 7,010 square miles. 

Records available.- July 1907 to September 1938. 

Extremes.- Maximum discharge, 82-100 second-feet. May 29, 30, 1928 (gage height, 17.1

feet); minimum prior to construction of Kerr Dam, 1,360 second-feet Dec. 9-14, 1919,

Mar. 14, 1920 (gage height, -0.1 foot). A flow probably less than 5 second-feet

occurred Apr. 13, 1959 as a result of regulation at Kerr Dam. 

Remarks.- Several small diversions from tributaries above Flathead Lake. Flow somewhat

regulated by natural storage in Flathead Lake prior to completion of Kerr Dam Apr. 12,

1938, which regulated flow thereafter.
122 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Plathead River near Poison, Hont.

Month

1907

1907-8

May. ..........................

September .....................

1908-9

April .........................

September .....................

1909-10

April.........................

July. .........................

1910-11

Discharge in second-feet

Maximum

26,600 

20,700 

9,330

6,850 

4,160 

3,130 

2,810 

2,440 

2,910 

18,400 

33,600 

62,100 

33,600 

14,900 

5,750

62,100

4,450 

4,160 

4,020 

3,490 

3,130 

2,620 

3,880 

30,400 

58,800 

47,600 

18,200 

6,800

58,800

4,880 

9,700 

10,500 

7,100 

4,120 

9,630 

34,700 

42,800 

38,900 

22,000 

8,740 

4,720

42,800

5,900 

9,470 

9,000 

5,040 

3,600 

3,600 

14, 800 

30,400 

44,200 

41,000 

14,400 

6,520

44,200

Minimum

21,800 

9,330 

7,090

4,160 

3,130 

2,810 

2,360 

2,280 

2,280 

2,530 

18,700 

32,700 

14,500 

5,230 

4,300

2,280

3,880 

4,020 

3,130 

3,130 

2,620 

2,530 

2,530 

3,880 

31,100 

18,800 

7,030 

5,060

2,530

3,700 

3,770 

6,250 

4,120 

3,820 

3,B20 

9,800 

33,800 

23,000 

9,000 

4,640 

3,640

3,640

3,720 

5,900 

5,280 

3,600 

3,010 

2,690 

3,600 

14,800 

25,800 

14,800 

6,520 

5,040

2,690

Mean

24,300 

13,900 

8,290

5,520 

3,620 

3,000 

2,450 

2,420 

2,460 

7,040 

29,000 

48,800 

27,100 

9,570 

4,940

12,200

4,090 

4,060 

3,480 

3,270 

2,810 

2,550 

2,780 

11,000 

50,800 

31,600 

12,100 

5,840

11,210

4,320 

6,320 

8,330 

5,080 

4,030 

5,290 

17,200 

38,000 

31,100 

15,200 

6,410 

4,270

12,200

5,010 

7,860 

7,180 

4,140 

3,270 

2,960 

6,320 

24,800 

38,300 

26,100 

8,750 

5,770

11,700

Per 

square 

mile

3.47 

1.98 

1.18

.787 

.516 

.428 

.349 

.345 

.351 

1.00 

4.14 

6.96 

3.86 

1.37 

.704

1.74

.583 

.579 

.497 

.466 

.401 

.364 

.397 

1.57 

7.25 

4.51 

1.73 

.833

1.60

.616 

.902 

1.19 

.725 

.575 

.755 

2.45 

5.42 

4.44 

2.17 

.914 

.609

1.74

.715 

1.12 

1.02 

.591 

.466 

.422 

.902 

3.54 

5.46 

3.72 

1.25 

.823

1 £7

Run- off

Inches

1.16 

2.28 

1.32

.91 

.58 

.49 

.40 

.37 

.40 

1.12 

4.77 

7.76 

4.43 

1.58 

.79

23.62

.67 

.65 

.57 

.54 

.42 

.42 

.44 

1.81 

8.09 

5.20 

1.99 

.93

21.73

.71 

1.01 

1.37 

.84 

.60 

.87 

2.73 

6.25 

4.95 

2.50 

1.05 

.68

23.56

.82 

1.25 

1.18 

..68 

.49 

.49 

1.01 

4.08 

6.09 

4.29 

1.44 

.92

22.74

Acre-feet

434,000 

855,000 

493,000

339,000 

215,000 

184,000 

156,000 

139,000 

151,000 

419,000 

1,780,000 

2,900,000 

1,670,000 

588,000 

294,000

8,840,000

251,000 

242,000 

214,000 

201,000 

156,000 

157,000 

165,000 

676,000 

3,020,000 

1,940,000 

744,000 

348,000

8,110,000

266,000 

376,000 

512,000 

312,000 

224,000 

325,000 

1,020,000 

2,340,000 

1,850,000 

935,000 

394,000 

254,000

8,810,000

308,000 

468,000 

441,000 

255,000 

182,000 

182,000 

376,000 

1,520,000 

2,280,000 

1,600,000 

538,000 

343,000

8,490,000
PEND OREILLE PIVER BASIN 123

Monthly discharge of Plathead River near Poison, Mont. Continued

Month

1911-12

1912-13

1913-14

July...................:......

1914-15

The year ...................

1915-16

September. ....................

The year ...................

Discharge In second-feet

Maximum

5,230 

4,170 

3,470 

2,900 

2,790 

2,690 

12,800 

36,000 

36,500 

28,100 

12,800 

7,010

36,500

5, '630 

5,630 

4,850 

3,880 

3,230 

2,900 

14,800 

53,600 

75,400 

46,900 

15,300 

7,540

75,400

4,330 

4,500 

4,500 

3,350 

3,010 

3,120 

14,400 

41,000 

36,500 

22,000 

9,620 

4,850

41,000

6,520 

9,930 

7,820 

4,330 

3,120 

2,900 

12,400 

21,000 

19,000 

19,000 

13, 200 

6,290

21,000

5,040 

4,850 

4,670 

4,500 

3,230 

9,620 

16,200 

29,800 

74,000 

74,700 

28,700 

13,200

74 , 70C

Minimum

4,220 

3,350 

3,010 

2,590 

2,590 

2,310 

2,400 

12,800 

28,700 

13,200 

6,760 

5,430

2,310

4,850 

4,670 

2,150 

3,120 

2,900 

2,790 

2,790 

15,300 

47,600 

15,700 

7,540 

4,170j

2,150

3,230 

3,800 

3,230 

2,400 

2,790 

2,690 

3,230 

14,400 

23,100 

9,930 

4,020 

3,740

2,400

4,170 

6,060 

4,170 

3,010 

2,490 

2,310 

2,900 

13,200 

17,100 

12,800 

6,520 

4,500

2,310

4,670 

4,670 

4,330 

3,010 

2,900 

3,120 

9,310 

16,200 

27,000 

29,800 

11,300 

8,700

2,900

Mean

4,840 

3,730 

3,260 

2,660 

2,690 

2,380 

5,890 

24,800 

34,000 

19,300 

9,900 

6,210

9,980

5,150 

5,260 

4,190 

3,450 

3,020 

2,850 

6,510 

24,400 

64,400 

28,600 

10,800 

*5,540

13,700

3,800 

4,240 

3,690 

3,120 

3,000 

2,890 

7, -100 

26,700 

30,000 

15,400 

6,670 

4,040

9,250

5,320 

8,370 

5,640 

3,630 

2,790 

2,490 

6,510 

18,200 

18,100 

16,200 

9,740 

5,260

8,560

4,820 

4,700 

4,490 

3,520 

3,040 

4,770 

11,900 

25,800 

48,000 

55,600 

17,500 

11,100

16,300

Per 

square 

mile

0.690 

.532 

.465 

.379 

.384 

.340 

.840 

3.54 

4.85 

2.75 

1.41 

.886

1.42

.735 

.750 

.598 

.492 

.431 

.407 

.929 

3.48 

9.19 

4.08 

1.54 

.790

1.95

.&42 

.605 

.526 

>445 

.428 

.412 

1.01 

3.81 

4.28 

2.20 

.951 

.576

1.32

.759 

1.19 

.805 

.518 

.398 

.355 

.929 

2.60 

2.58 

2.31 

1.39 

.750

1.22

.688 

.670 

.641 

.502 

.434 

.680 

1.70 

3.68 

6.85 

7.93 

2.50 

1.58

2.32

Run-off

Inches

0.80 

.59 

.54 

.44 

.41 

.39 

.94 

4.08 

5.41 

3.17 

1.63 

.99

19.36

.85 

.84 

.69 

.57 

.45 

.47 

1.04 

4.01 

10.25 

4.70 

1.78 

.88.

26.53

.62 

.68 

.61 

.51 

.45 

.48 

1.13 

4.39 

4.78 

2.54 

1.10 

.64

17.93

.88 

1.33 

.93 

.60 

.41 

.41 

1.04 

3.00 

2.88 

2.66 

1.60 

.84

16.58

.79 

.75 

.74 

.58 

.47 

.78 

1.90 

4.24 

7.64 

9.14 

2.88 

l.'JS

31.67

Acre-feet

298,000 

222,000 

200,000 

164,000 

155,000 

146,000 

350,000 

1,520,000 

2,020,000 

1,190,000 

690,000 

370,000

7,240,000

317,000 

313,000 

258,000 

212,000 

168,000 

175,000 

387,000 

1,500,000 

3,830,000 

1,760,000 

664,000 

330,000

9,910,000

234,000 

252,000 

227,000 

192,000 

167,000 

178,000 

422,000 

1,640,000 

1,790,000 

947,000 

410,000 

240,000

6,700,000

327,000 

498,000 

347,000 

223,000 

155,000 

153,000 

387,000 

1,120,000 

1,080,000 

996,000 

599,000 

313,000

6,200,000

206,000 

283,000 

* 276,000 

216,000 

175,000 

293,000 

708,000 

1,590,000 

2,860,000 

3,420,000 

1,080,000 

660,000

11,900,000

* Previously published In error.
124 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Plathead River near Poison, Mont. Continued

Month

1916-17

April.........................

July. .........................

1917-18

Msv

July..........................

The year ...................

1918-19

April.........................

July..........................

1919-20

April.........................

July. .........................

The year ...................

1920-21

March. ........................

April.........................

July..........................

Discharge In second-feet

Maximum

9,310 

5,630 

4,330 

2,790 

2,590 

2,310 

5,040 

46,200 

59,100 

52,200 

17,500 

6,760

59,100

3,600 

2,690 

2,900 

11,300 

5,840 

4,670 

16,600 

34,600 

58,400 

41,600 

12,000 

5,840

58,400

3,740 

3,350 

2,900 

2,790 

2,400 

2,400 

15,700 

46,600 

48,200 

23,100 

7,540 

4,170

48,200

2,490 

2,690 

2,640 

1,680 

1,620 

1,620 

6,060 

29,300 

44,200 

38,100 

14,400 

7,820

44,200

5,840 

4,850 

4,330 

3,740 

3,470 

7,010 

17,300 

56,400 

62,000 

40,600 

14,600 

6,120

62,000

Minimum

5,210 

4,020 

3,120 

2,490 

2,400 

2,000 

2,230 

4,670 

43,600 

18,500 

7,010 

3,740

2, 000

2,690 

2,490 

2,310 

3,350 

3,010 

2,900 

o,630 

17,500 

27,000 

12,400 

6,060 

3,880

2,310

3,120 

3,010 

2,490 

2,070 

2,400 

2,310 

2,310 

18,000 

23,600 

7,820 

3,880 

2,490

2,070

2,070 

1,860 

1,360 

1,460 

1,550 

1,360 

1,570 

6,290 

26,400 

15,300 

7,540 

4,020

1,360

4,020 

3,880 

3,350 

3,230 

3,010 

3,350 

6,780 

16,400 

41,300 

15,000 

6,340 

3,650

3,010

Mean

6,730 

4,600 

3,630 

2,670 

2,470 

2,240 

2,960 

22,400 

51,700 

35,500 

11,400 

4,770

12,600

3,070 

2,610 

2,580 

8,720 

4,130 

3,770 

10,300 

29,700 

44,200 

23,000 

8,430 

4,690

12,100

3,360 

3,230 

2,630 

2,250 

2,400 

2,340 

5,350 

24,900 

34,900 

14,500 

5,410 

3,110

8,720

2,300 

2,220 

1,670 

1,560 

1,600 

1,510 

2,630 

18,200 

36,200 

27,000 

9,900 

5,160

9,180

5,120 

4,310 

3,860 

3,480 

3,250 

5,800 

12,000 

33,700 

54,000 

25,900 

9,670 

4,810

13,900

Per 

square 

mile

0.960 

.656 

.518 

.381 

.352 

.320 

.422 

3.20 

7.38 

5.06 

1.63 

.680

1.80

.438 

.372 

.368 

1.24 

.589 

.538 

1.47 

4.24 

6.31 

3.28 

1.20 

.669

1.73

.479 

.461 

.375 

.321 

.342 

.334 

.763 

3.55 

4.98 

2.07 

.772 

.444

1-24

.328 

.317 

.238 

.223 

.228 

.215 

.375 

2.60 

5.16 

3.85 

1.41 

.736

1.31

.730 

.615 

.551 

.496 

.464 

.827 

1.71 

4.81 

7.70 

3.69 

1.38 

.686

1.98

Run-off

Inches

1.11

.73

.60 

.44 

.37 

.37 

.47 

3.69 

8.23 

5.83 

1.88 

.76

K24.48

.50 

.42 

.42 

1.43 

.61 

.62 

1.64 

4.89 

7.04 

3.78 

1.38 

.76

23.48

.55 

.51 

.43 

.37 

.36 

.39 

.85 

4.09 

»5.56 

2.39 

.89 

.50

&16.89

.38 

.35 

.27 

.26 

.25 

.25 

.42 

3.00 

5.76 

4.44 

1.63 

.82

17.83

.84 

.69 

.64 

.57 

.48 

.95 

1.91 

5.54 

8.59 

4.25 

1.59 

.77

26.82

Acre-feet

414,000 

274,000 

223,000 

164,000 

137,000 

138,000 

176,000 

1,380,000 

3,080,000 

2,180,000 

701,000 

284,000

9,150,000.

189,000 

155,000 

159,000 

536,000 

229,000 

232,000 

613,000 

1,830,000 

2,630,000 

1,410,000 

518*000 

279,000

8,780,000

207,000 

192,000 

162,000 

138,000 

133,000 

144,000 

318,000 

1,530,000 

2,080,000 

- 892,000 

333,000 

185,000

6,310,000

141,000 

132,000 

103,000 

95,900 

92,000 

92,800 

156,000 

1,120,000 

2,150,000 

1,660,000 

609,000 

307,000

6,660,000

315,000 

256,000 

237,000 

214,000 

180,000 

357,000 

714,000 

2,070,000 

3,210,000 

1,590,000 

595,000 

286,000

10,000,000

Previously published in error.
PEND OREILLE RIVER BASIN 125

Monthly discharge of Flathead River near Poison, Mont. Continued

Month

1921-22 .

May...........................

1922=23

July..........................

September. ....................

1923-24

May...........................

July. .........................

September .....................

1924-25

1925-26

The year. ..................

Discharge In second-feet

Maximum

4,260 

3,800 

4,750 

4,750 

3,570 

2,940 

5,800 

44,800 

56,400 

35,100 

11,500 

5,700

56,400

3,650 

3,130 

2,910 

3,110 

2,950 

2,530 

11,200 

46,300 

55,900 

38,800 

14,600 

6,670

55,900

3,740 

3,110 

3,100 

2,880 

3,460 

3,890 

7,870 

47,000 

43,700 

28, 200 

10,400 

5,340

47,000

3,320 

3,320 

3,250

5,110 

32,700 

67,000 

65,600 

47,100 

14,600 

8,270

67,000

5,960 

4,040

4,040 

21,700 

29,300 

23,400 

13,300 

5,510 

5,080

29,300

Minimum

3,510 

5,250 

3,380 

3,650 

2,730 

2,700 

2,740 

6,120 

36,700 

11,800 

5,700 

3,800

2,700

3,130 

2,670 

2,420 

2,330 

2,510 

2,420 

2,510 

12,700 

39,000 

15,400 

6,780 

3,800

2,330

2,490 

2,730 

2,420 

2,520 

2,660 

2,760 

3,080 

8,770 

28,600 

10,900 

5,740 

3,290

2,420

3,080 

3,130 

3,130

4,020 

5,700 

29,200 

45,100 

15,400 

8,550 

5,300

_

4,040 

3,140

2,850 

3,830 

£3,400 

13 , 600 

5,660 

3,240 

3,340

-

Mean

3,690 

3,420 

3,810 

4,070 

3,120 

2,770 

3,460 

22,600 

49,500 

20,900 

8,100 

4,740

10,900

3,400 

2,880 

2,650 

2,740 

2,760 

2,460 

5,090 

29,300 

47,800 

26,400 

9,970 

4,900

11,700

. 3,100 

2,890 

2,670 

2,640 

2,910 

3,120 

4,060 

31,300 

37,000 

18,000 

7,700 

4,490

10,000

3,190 

3,200 

3,170 

e3,100 

e3,500 

a4,740 

20,800 

46,700 

50,700 

27,100 

10,400 

6,420

15,300

4,620 

3,550 

e3,300 

e2,600 

e2,200 

3,200 

9,210 

26,000 

17,300 

9,060 

4,230 

4,420

7,510

Per 

square 

mile

0.526 

.488 

.544 

.581 

.445 

.395 

.494 

3.22 

7.06 

2.98 

1.16 

.676

1.55

.485 

.411 

.378 

.391 

.394 

.351 

.726 

4.18 

6.82 

3.77 

1.42 

.699

1.67

.442 

.412 

.381 

.377 

.415 

.445 

.579 

4.47 

5.28 

2.57 

1.10 

.641

1.43

.455 

.456 

.452 

.442 

.500 

.676 

2.97 

6.66 

7.23 

3.87 

1.48 

.916

2.18

.659 

.506 

.471 

.371 

.314 

.456 

1.31 

3.71 

2.47 

1.29 

.603 

.631

1.07

Run- off

Inches

0.61 

.54 

.63 

.67 

.46 

.46 

.55 

3.71 

7.88 

3.44 

1.34 

.75

21.04

.56 

.46 

.44 

.45 

.41 

.40 

.81 

4.82 

7.61 

4.35 

1.64 

.78

22.73

.51

.46 

.44 

.43 

.45 

.51 

.65 

5.15 

5.89 

"2.96 

1.27 

.72

19.44

.52 

.51 

.52

.51 

.52 

.78 

3.31 

7.68 

8.07 

4.46 

1.71 

1.02

29.61

.76 

.56 

.54 

.43 

.33 

.53 

1.46 

4.28 

2.76 

1.49 

.70 

.70

14.54

Acre-feet

227,000 

204,000 

234,000 

250,000 

173,000 

170,000 

206,000 

1,390,000 

2,950,000 

1,290,000 

498,000 

282,000

7,870,000

209,000 

171,000 

163,000 

168,000 

153,000 

151,000 

303,000 

1,800,000 

2,840,000 

1,620,000 

613,000 

292,000

8,480,000

191,000 

172,000 

164,000 

162,000 

167,000 

192,000 

242,000 

1,920,000 

2,200,000 

1,110,000 

473,000 

267,000

7,260,000

196,000 

190,000 

195,000 

191,000 

194,000 

291,000 

1,240,000 

2,870,000 

3,020,000 

1,670,000 

640,000 

382,000

11,100,000

284,000 

211,000 

203,000 

160,000 

122,000 

197,000 

548,000 

1,600,000 

1,030,000 

557,000 

260,000 

263,000

5,440,000

a Partly estimated. 

e Estimated.

527283 O - 43 - 9
126 SURFACE WATERS OF UPPER COLUMBIA FIVER BASIN, 1898-1938

Monthly discharge of Plathead River near Poleon, Mont. Continued

Month

1926-27

The year. ..................

1927-28

July..........................

The

1928-29

July..........................

1929-30

1930-31

May...........................

The year ...................

Discharge in second-feet

Maximum

10,300 

10,300 

10,000 

7,010 

4,580 

4,180 

15,400 

45,100 

75,000 

66,300 

22,500 

10,700

75,000

12,400

15,200 

82,100 

79,200 

43,200 

19,500 

7,640

82,100

5,330 

5,160 

4,290 

3,290 

2,860 

3,070 

6,180 

41,100 

44,600 

27,500 

9,460 

4,430

44,600

2,950 

2,450 

2,360 

2,500 

2,500 

2,830 

23,700 

28,200 

30,300 

19,700 

8,340 

4,010

30,300

3,460 

3,590 

3,460 

2,660 

2,710 

3,730 

8,340 

35,400 

31,700 

15,300 

6,610 

3,460

35,400

Minimum

5,080 

7,250 

7,010 

4,580 

4,180 

3,880 

3,800 

18,800 

43,800 

23,000 

9,120 

8,550

3,800

8,760

7,000 

16,600 

41,900 

19,500 

7,780 

4,540

-

4,440 

4,150 

3,290 

2,860 

2,660 

2,660 

3,070 

7,060 

28,200 

9,750 

4,570 

3,070

2,660

2,400 

1,960 

1,890 

1,540 

1,920 

2,230 

2,550 

24,300 

20,300 

8,610 

4,010 

3,200

1,540

3,070 

3,140 

2,660 

2,400 

2,600 

2,500 

3,460 

8,890 

15,800 

6,830 

3,460 

2,950

 2,400

Mean

7,690 

8,450 

8,400 

5,810 

4,380 

4,020 

5,470 

32,800 

63,000 

42,200 

14,100 

9,580

17,200

10,100 

8,600 

7,900 

6,000 

5,300 

5,700 

8,340 

48,900 

53,000 

31,700 

12,500 

6,090

17,100

4,950 

4,560 

3,630 

3,090 

2,730 

2,830 

3,650 

20,400 

39,600 

16,800 

6,520 

3,630

9,380

2,630 

2,210 

2,180 

1,870 

2,150 

£,470 

10,200 

25,900 

27,100 

13,100 

5,860 

3,530

8,290

3,250 

3,390 

3,110 

2,540 

2,660 

2,920 

5,580 

24, 800 

24,700 

10,400 

4,730 

3,130

7,630

Per 

square 

mile

1.10 1.21

1.20 

.829 

.625 

.573 

.780 

4.68 

8.99 

6.02 

2.01 

1.37

2.45

1.44 

1.23 

1.13 

.856 

.756 

.813 

1.19 

6.98 

7.56 

4.52 

1.78 

.869

2.44

.706 

.650 

.518 

.441 

.389 

.404 

.521 

2.91 

5.65 

2.40 

.930 

.518

1.34

.375 

.315 

.311 

.267 

.307 

.352 

1.46 

3.69 

3.87 

1.87 

.836 

.504

1.18

' .464 

.484 

.444 

.362 

.379 

.417 

.796 

3.54 

3.52 

1.48 

.675 

.447

1.09

Run- off

Inches

1.27 

1.35 

1.38 

.96 

.65 

.66 

.87 

5.40 

10.03 

6.94 

2.32 

1.53

*33.36

1.66 

1.37 

1.30 

.99 

.82 

.94 

1.33 

8.05 

8.44 

5.21 

2.05 

.97

33.13

.81 

.73 

.60 

.51 

.41 

.47 

.58 

3.36 

6.30 

2.77 

1.07 

.58

18.19

.43 

.35 

.36 

.31 

.32 

.41 

1.63 

4.25 

4.32 

2.16 

.96 

.56

16.06

.54 

.54 

.51 

.42 

.39 

.48 

.89 

4.08 

3.93 

1.71 

.78 

.50

14.77

Acre-feet

473,000 

503,000 

516,000 

357,000 

243,000 

247,000 

325,000 

2,020,000 

3,750,000 

2,590,000 

867,000 

570,000

12,500,000

621,000 

512,000 

486,000 

369,000 

305,000 

350,000 

496,000 

3,010,000 

3,150,000 

1,950,000 

769,000 

362,000

12,400,000

304,000 

271,000 

223,000 

190,000 

152,000 

174,000 

217,000 

1,250,000 

2,360,000 

1,030,000 

401,000 

216,000

6,790,000

162,000 

132,000 

134,000 

115,000 

119,000 

152,000 

607,000 

1,590,000 

1,610,000 

806,000 

360,000 

210,000

6,000,000

200,000 

202,000 

191,000 

156,000 

148,000 

180,000 

332,000 

1,520,000 

1,470,000 

640,000 

291,000 

186,000

5,520,000

* Previously published in error.
PEND OREILLE RIVER BASIN 127

Monthly discharge of Plathead River near Poison, Mont. Continued

Month

1931-32

April. ........................

May...........................

1932-33

September .....................

1933-34

July..........................

1934-35

April.........................

May...........................

September. ....................

1935-36

May...........................

July..........................

September .....................

Discharge In second-feet

Maximum

3,000 

2,780 

2,630 

2,680 

2,580 

5,690 

17,500 

51,200 

45,500 

38,000 

12,000 

5,880

51,200

3,780 

5,690 

7,150 

5,130 

4,060 

3,260 

13,600 

38,000 

76,600 

57,100 

17,000 

6,710

76,600

11,300 

14,800 

14,000 

14,400 

9,310 

9,630 

46,900 

51,500 

49,500 

21,800 

8,560 

4,410

51,500

3,260 

6,510 

6,510 

4,490 

4,800 

4,340 

10,100 

45,600 

49,500 

34,600 

12,300 

5,500

49,500

3,320 

2,870 

2,340 

2,340 

2,030 

2,570 

22,800 

50,200 

48,900 

18,900 

7,160 

3,600

50,200

Minimum

2,440 

2,370 

2,490 

2,270 

2,140 

2,680 

5,500 

17,500 

39,300 

12,400 

5,880 

3,780

2,140

3,020 

3,260 

5,320 

4,060 

3,260 

3,140 

3,140 

15,200 

39,900 

17,500 

6,710 

4,490

3,020

4,200 

10,900 

9,000 

9,310 

6,290 

5,880 

9,950 

46,200 

22,800 

8,310 

4,580 

2,760

2,760

2,420 

3,140 

3,780 

3,510 

4,340 

3,920 

3,920 

10,700 

35,200 

13,100 

5,890 

3,510

2,420

2,570 

2,230 

2,010 

1,930 

1,840 

1,930 

1,840 

23,4dO 

20,000 

7,160 

3,600 

2,570

1,840

Mean

2,750 

2,530 

2,560 

2,480 

2,260 

4,620 

11,200 

35,300 

42,900 

23,400 

8,490 

4,660

11,900

3,380 

4,210 

5,980 

4,570 

3,670 

3,190 

4,940 

24,800 

63,100 

34,300 

10,900 

5,500

14,100

5,223 

13,420 

10,940 

12,050 

7,920 

7,316 

22,310 

49,210 

35,020 

14,310 

6,221 

3,600

15,660

2,792 

5,277 

5,174 

4,043 

4,666 

4,101 

5,279 

25,080 

45,260 

22,520 

8,555 

4,329

11,430

2,886 

2,362 

2,155 

2,150 

1,912 

2,165 

7,507 

40,200 

33,940 

11,900 

5,060 

3,003

9,617

Per 

square 

mile

0.392 

.361 

.365 

.354 

.322 

.659 

1.60 

5.04 

6.12 

3.34 

1.21 

.665

1.69

.482 

.601 

.853 

.652 

.524 

.455 

.705 

3.54 

9.00 

4.89 

1.55 

.785

2.01

.745 

1.91 

1.56 

1.72 

1.13 

1.04 

3.18 

7.02 

5.00 

2.04 

.887 

.514

2.23

.398 

.753 

.738 

.577 

.651 

.585 

.753 

3.58 

6.46 

3.21 

1.22 

.618

1.63

.412 

.337 

.307 

.307 

.273 

.309 

1.07 

5.73 

4.84 

1.70 

.722 

.428

1.37

Run- off

Inchee

0.45 

.40 

.42 

.41 

.35 

.76 

1.78 

5.81 

6.83 

3.85 

1.40 

.74

23.20

.56 

.67 

.98 

.75 

.55 

.52 

.79 

4.08 

10.04 

5.64 

1.79 

.88

27.25

.86 

2.13 

1.80 

1.98 

1.18 

1.20 

3.55 

8.09 

5.58 

2.35 

1.02 

.57

30.31

.46 

.84 

.85 

.67 

.68 

.67 

.84 

4.13 

7.21 

3.70 

1.41 

.69

22.15

.48 

.38 

.35 

.35 

.29 

.36 

1.19 

6.61 

5.40 

1.96 

.83 

.48

18.68

Acre-feet

169,000 

151,000 

157,000 

152,000 

130,000 

284,000 

666,000 

2,170,000 

2,550,000 

1,440,000 

522,000 

277,000

8,670,000

208,000 

251,000 

368,000 

281,000 

204,000 

196,000 

294,000 

1,520,000 

 3,750,000 

2,110,000 

670,000 

327,000

10,200,000

321,200 

798,700 

672,600 

741,000 

439,900 

449,800 

1,327,000 

3,026,000 

2,084,000 

880,000 

382,500 

£14,200

11,340,000

171,600 

314,000 

318,100 

248,600 

253,600 

252,100 

314,100 

1,542,000 

2,693,000 

1,385,000 

526,100 

257,600

8,276,000

177,500 

140,600 

132,500 

132,200 

110,000 

133,100 

446,700 

2,472,000 

2,019,000 

727,700 

311,100 

178,700

6,981,000
128 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Flathead River near Poison, Mont. Continued

Month

1936-37

April.........................

July. .........................

1937-38

Discharge in second- feet

Maximum

2,510 

2,180 

1,930 

1,800 

1,800 

1,980 

5,140 

35,200 

35,800 

28,300 

9,180 

4,480

35,800

3,000 

3,240 

3,310 

3,440 

3,240 

3,310 

17,300 

43,900 

48,500 

28, 200 

6,630 

9,340

48,500

Minimum

2,030 

1,750 

1,430 

1,660 

1,700 

1,580 

1,880 

5,500 

28,900 

9,780 

4,640 

2,870

1,430

2,400 

2,450 

1,700 

3,000 

2,820 

2,820 

32 

18,300 

30,000 

3,440 

1,380 

3,150

32

Mean

2,277 

1,897 

1,680 

1,713 

1,738 

1,828 

2,710 

20,740 

33,390 

17,260 

6,556 

3,528

7,968

2,708 

2,889 

3,062 

3,132 

2,981 

2,931 

7,547 

27,220 

41,720 

11,430 

3,350 

6,674

9,637

Per 

square 

mile

0.325 

.271 

.240 

.244 

.248 

.261 

.387 

2.96 

4.76 

2.46 

.935 

.503

1.14

.386 

.412 

.437 

.447 

.425 

.418 

1.08 

3.88 

5.95 

1.63 

.478 

.952

1.37

Run-off

Inches

0.37 

.30 

.28 

.28 

.26 

.30 

.43 

3.41 

5.31 

2.84 

1.08 

.56

15.42

.44 

.46 

.50 

.52 

.44 

.48 

1.20 

4.47 

 6.64 

1.88 

.55 

1.06

18.64

Acre-feet

140,000 

112,900 

103,300 

105,300 

96,500 

112,400 

161,300 

1,275,000 

1,987,000 

1,061,000 

403, 100 

210,000

5,768,000

166,500 

171,900 

188,300 

192,600 

165,500 

180,200 

449,100 

1,674,000 

2,483,000 

'702,900 

206,000 

397,100

6,977,000

Yearly discharge of Flathead River near Poison, Mont.

Year

1912...........

1913........... 

1914...........

1915...... .....

1917...........

1918........... 

1919...........

1922. ..........

1923........... 

1924. ..........

1925...... .....

1926...........

1927.. .........

1928. .......... 

1929...........

1930...........

1932. ..........

1933........... 

1934...........

1936...........

T Q^*7

Year ending Sept. 30

Discharge in 

second-feet

Mean

12,200 

11,200 

12,200 

11,700 

9,980

13,700 

9,250 

8,560 

16,300 

12,600

12,100 

8,720 

9,180 

13,900 

10^900

11,700 

10,000 

15,300 

7,510 

17,200

17,100 

9,380 

8,290 

7,630 

11,900

14,100 

15,660 

11,430 

9,617 

7,968 

9,637

17,200 

11,510 

7,510

Per 

square 

mile

1.74 

1.60 

1.74 

1.67 

1.42

1.95 

1.32 

1.22 

2.32 

1.80

1.73 

1.24 

1.31 

1.98 

1.55

1.67 

1.43 

2.18 

1.07 

2.45

2.44 

1.34 

1.18 

1.09 

1.69

2.01 

2.23 

1.63 

1.37 

1.14 

1.37

2.45 

1.64 

1.07

Run-off

Inches

23.62 

21.73 

23.56 

22.74 

19.36

26.53 

17.93 

16.58 

31.67 

24.48

23.48 

16.89 

17.83 

26.82 

21.04

22.73 

19.44 

29.61 

14.54 

33.36

33.13 

18.19 

16.06 

14.77 

23.20

27.25 

30.31 

22.15 

18.68 

15.42 

18.64

33.36 

22.31 

14.54

Acre-feet

8,840,000 

8,110,000 

8,810,000 

8,490,000 

7,240.000

9,910,000 

6,700,000 

6,200,000 

11,900,000 

9,150,000

8,780,000 

6,310,000 

6,660,000 

10,000,000 

7,870,000

8,480,000 

7,260,000 

11,100,000 

5,440,000 

12.500.000

12,400,000 

6,790,000 

6,000,000 

5,520,000 

8,670,000

10,200,000 

11,340,000 

8,276,000 

6,981,000 

5,768,000 

6,677,000

12,500,000 

8,344,000 

5,440,000

Calendar year

Discharge in 

second-feet

Mean

la, 100 

11,800 

12,300 

11,000 

10,200

13,500 

9,890 

8,120 

16,400 

12.100

12,200 

8,470 

9,770 

13,600 

10,700

11,700 

10,100 

15,500 

8,600 

17.400

15, 900 

8,870 

8,510 

7,460 

12,400

15,400 

14,300 

10,940 

9,487 

8,203

17,400 

11,560 

7,460

Per 

square 

mile

1.73 

l.ffS 

1.75 

1.57 

1.46

1.93 

1.41 

1.16 

2.34 

1.73

1.74 

1.21 

1.39 

1.94 

1.53

1.67 

1.44 

2.21 

1.23 

2.48

2.27 

1.27 

1.21 

1.06 

1.77

2.20 

2.04 

1.56 

1.35 

1.17

2.48 

1.65 

1.06

Run- off

Inches

23.53 

22.93 

23.72 

21.42 

19.84

26.06 

19.16 

15.72 

31.83 

23.38

23.63 

16.40 

19.00 

26.43 

20.72

22.68 

19.58 

29.92 

16.68 

33.69

30.94 

17.19 

16.51 

14.45 

24.14

29.83 

27.67 

21.21 

18.42 

15.87

33.69 

22.42 

14.45

Acre-feet

8,800,000 

8,560,000 

8,870,000 

8,000,000 

7,410,000

9,740,000 

7,160,000 

5,880,000 

11,900,000 

8.740,000

8,840,000 

6,130,000 

7,090,000 

9,880,000 

7,750,000

8,470,000 

7,310,000 

11,200,000 

6,230,000 

12.600.000

11,600,000 

6,420,000 

6,160,000 

5,400,000 

9.020,000

11,100,000 

10,350,000 

7,923,000 

6,887,000 

5,938,000

12,600,000 

8,379,000 

5,400,000
PEND OREILLE RIVER BASIN 129

Middle Fork of Flathead River at Belton, Mont.

Location.- Staff gage, lat. 48°30', long. 113°59', in NWi sec. 36, T, 32 R. 19 W.,

at Belton. 

Drainage area.*- 900 square miles.

Records available." October 1910 to September 19S3, February 1929 to June 1933. 

Extremes." Maximum discharge observed, 49,000 second-feet June 21, 1916 (gage height,

20.0 feet); minimum observed, 115 second-feet Mar. 1, 1929 (gage height, 1.50 feet, 

-ice present). 

Remarks.- Ho diversion or regulation.

Monthly discharge of Middle Pork of Plathead River at Belton. Mont.

Month

Discharge in second-feet

Maximum Minimum Mean square 

mile

Run-off

Inches

1910-11

October...............

November..............

December..............

January...............

February..............

March.................

April.................

May...................

June..................

July..................

August................

September.............

The year...........

1911-12 

October...............

November..............

December..............

January...............

February..............

March.................

April.................

May...................

June.................

July.................

August...............

September.............

The year..........

1912-13 

October..............

November.............

December.............

April 6-30............

May..................

June 1-12............

July 3-31............

August................

September 1-21.......

1913-14 

November 12-30.......

December..............

January...............

February..............

March.................

April.................

May..................

June 1-8..............

September 14-30.......

1914-15 

October...............

November..............

December..............

March-................

April.................

May...................

June..................

July..................

August................

September.............

a Partly estimated, 

e Estimated.

3,270

3,700

1,200

620

570

2,100

8,210

11,900

12,600

5,090

1,400

1,400

960

1,110

560

340

440

400

1,100

4,550

5,470

1,400

1,020

960

al,570

1,960

808

538

505

891

3,080

7,030

8,390

2,760

1,140

1,120

1.74

2.18

.898

.598

.561

.990

3.36

7.81

9.32

3.07

1.27

1.24

2.01

2.43

1.04

.69

.58

1.14

3.75

9.00

10.40

3.54

1.46

L.38

12,600 340 2,480 2.76 37.42

1,240

900

620

450

412

6,280

12,200

7,330

2,830

1,390

1,480

900

670

400

412

182

376

3,240

2,960

1,390

971

732

1,140

759

431

403

415

377

3,360

7,990

5,620

1,950

1,130

1,060

1,27 

.843 

.479 

.448 

,461 

.419 

3.73 

8.88 

6.24 

2.17 

1.S6 

1.18

1.46

.94

.55

.52

.50

.48

4.16

10.24

6.96

2.50

1.45

1.32

12,200 182 2,060 2.29 31.08

2,100

7,690

26,900

20,500

4,810

1,770

1,100

1,100

710

960

6,190

11,500

10,000

1,240

1,670

2,300

1,240

928

6,400

6,820

6,400

3,770

1,770

1,400

" 907

535

2,410

11,800

1,400

1,100

590

650

342

380

830

4,630

3,770

485

510

1,100

265

182

895

2,410

3,170

1,770

830

830

810

1,300

e600

3,620

9,850

16,200

2,940

1,390

841

891

493

424

403

668

3,620

7,300

7,160

628

1,100

1,440

492

474

3,140

4,170

3,960

2,630

1,170

1,060

.900

1.44

.667

4.02

10.9

18.0

3.27

1.54

.934

.990

.548

.471

.448

.742

4.02

8.11

7.96

.698

1.22

1.60

.547

.527

3.49

4.63

4.40

2.92

1.30

1.18

1.04

1.61

.77

3.74

12.57

8.03

2.53

1.78

.73

.70

.63

.54

.47

.86

4.48

9.35

S.37

.44

1.41 

1.78 

.63 

.61 

3.89 

5.-34 

4.91 

3.37 

1.50 

1.32

96,500

117,000

49,700

33,100

88,000

54,800

180,000

432,000

499,000

170,000

70,100

66,600

1,800,000

70,100

45,800

26,500

24,800

23,900

23,200

200,000

491,000

334,000

120,000

69,500

63',100

1,490,000

49,800

77,400

36,900

180,000

606,000

386,000

169,000

85,500

35,000

33,600

30,700

26,100

22,400

41,100

215,000

449,000

114,000

21,200

67,600

85,700

30,300

29,100

187,000

256,000

236,000

162,000

71,900

63,100
130 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Middle Pork of Plathead River at Belton, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Per 

square 

mile

Inches Acre-feet

1915-16

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

October.....1.9.1.6.'.1.7.

November...........

December...........

January............

February...........

March.12^31. .......

April..............

May................

June...............

July...............

August.............

September..........

1917-18 

October............

November...........

December 1-16 .....

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

1918-19 

October............

November...........

December...........

January............

February...........

March 20-31.........

April..............

May................

June...............

July...............

August.............

September..........

October.....1.9.1.9.-.2.0.

November...........

December...........

January 1-8. .......

February 13-20......

March 9-31.........

April..............

May................

June...............

July...............

August.............

September..........

1,160

1,400

895

710

620

3,170

9,540

16,200

42,000

14,200

1,970

7,250

42,000

,020

,240

960

310

,670

,800

,700

,060

,300

710

510

325

325

830

1,620

5,380

15,600

22,300

4,120

1,390

820

760

552

452

1,310

580

475

8,600

13,600

7,030

3,260

940

475

390

390

580

320

475

4,070

11,500

10,300

5,280

1,600

1,430

960

895

710

562

535

590

1,580

3,930

5,580

1,770

1,160

895

1,090

1,080

809

624

568

1,460

3,480

6,960

14,700

6,440

1,470

1,920

1.21

1.20

.899

.693

.631

1.62

3.87

7.73

16.3

7.16

1.63

2.13

1.40

1.34

1.04

.80

,66

1.87

4.32

8.91

18.19

8.26

1.88

2.38

535 3,380 3.76 51.07

710

960

440

280

280

1,320

5,980

1,870

740

535

310

295

310

325

420

1,320

3,460

3,540

1,310

880

552

525

390

356

320

320

430

475

3,000

2,400

580

475

390

290

290

475

260

260

430

2,290

4,810

1,680

700

640

801

1,140

661

296

870

9,290

10,800

4,490

1,290

599

378

311

313

564

730

3,280

7,420

10,400

2,200

1,180

675

630

490

396

668

437

454

3,130

7,520

4,530

1,550

671

424

334

331

494

294

389

1,280

7,000

7,860

2,910 '941

1,150

.890

1.27

.734

.329

.967

10.3

12.0

4.99

1.43

.666

.420

.346

.348

.627

.811

3.64

8.24

11.6

2.44

1.31

.750

.700

.544

.440

.742

.486

.504

3.48

8.36

5.03

1.72

.746

,471

.371

.368

?549 

.327 

.432 

1.42 

7.78 

8.73 

3.23 

1.05 

1.28

1.02

1.42

.85

.24

1.08

11.9

13.4

5.75

1.65

.74

.48 

.39 

.21

.65 

.94

4,06

9.50

12.9

2.81

1.51

.84

.81

.61

.51

.86

.51

.22

3.88

9.64

5.61

1.98

.86

,53

.43

.41

7l6

.10

.37

1.58

8.97

9.74

3.72

1.21

1.43

67,000

64,300

49,700

38,400

32,700

89,800

207,000

428,000

875,000

396,000

90,400

114,000

2,450,000

49,300

67,800

40,600

11,700

51,800

571,000.

643,000

276,000

79,300

35,600

23,200

18,500

9,930

* 

31,300

44,900

195,000

456,000

619,000

135,000

72,600

40,200

38,700 

29,200 

24,300 

4^,100 

24,300 

10,800 

86,000 

462,000 

270,000 

95,300 

41,300 

25,200

20,500

19,700

7,840

4,660

17,700

76,200

430,000

468,000

179,000

57,900

68,400
PEND OREILLE RIVER BASIN 131

Monthly discharge of Middle Pork of Elathead River at Belton, Mont. Continued

Month

1920-21

July..........................

September .....................

, 1921-22

July..........................

1922-23

July..........................

1929

April.........................

The period. ................

1929-30

September .....................

Discharge in second-feet

Maximum

1,550 

1,010 

880 

452 

1,230 

1,550 

6,610 

21 ,500 

14,200 

10,000 

1,430 

700

21 ,500

580 

430 

6,610 

1,080 

640 

580 

1,390 

19,200 

22,100 

3,470 

1,010 

640

320 

410 

410

1,010 

7,470 

16 ,500 

15,000 

6,400 

1,550 

700

165 

950 

5,470 

17,600 

13,300 

3,030 

880 

547

-

330 

280

1,080 

729 

10,300 

9,430 

7,660 

2,400 

880 

647

10,300

Minimum

1,010 

880 

430 

320 

260 

475 

1,390 

2,510 

10,000 

1,430 

760 

475

260

430 

320 

355 

475 

320 

122 

152 

1,550 

3,610 

1,160 

430 

320

290 

320

320

320 

1,080 

5,380 

6,610 

1,640 

515 

390

120 

115 

485 

3,170 

3,170 

880 

524 

309

4»

265

175

330 

701 

3,590 

2,400 

880 

500 

432

-

Mean

1,330 

985 

711 

413 

406 

1,160 

3,540 

10,600 

12,300 

4,000 

1,070 

557

3,100

491 

392 

1,200 

892 

398 

233 

584 

10,400 

10,400 

2,030 

708 

486

318 

347 

370

532 

2,740 

11,200 

11,200 

2,620 

746 

566

145 

348 

1,470 

7,470 

6,240 

1,610 

642 

397

-

299 

240 

218 

211 

443 

424 

6,240 

6,010 

4,830 

1,470 

659 

516

1,800

Per 

square 

mile

1.48 

1.09 

.790 

.459 

.451 

1.29 

3.93 

11.8 

13.7 

4.44 

1.19 

.619

3.44

.546 

.436 

1.33 

.991 

.442 

.259 

.649 

11.6 

11.6 

2.26 

.787 

.540

.353 

.386 

.411

.591 

3.04 

L2.4 

L2.4 

2.91 

.829 

.629

.161 

.387 

1.63 

8.30 

6.93 

1.79 

.713 

.442

-

.332 

.267 

.242 

.234 

.492 

.471 

6.93 

6.68 

5.37 

1.63 

.732 

.573

2.00

Run-off

Inches

1.71 

1.22 

.91 

.53 

.47 

1.49 

4.38 

13.60 

15.29 

5.12 

1.37 

.69

46.78

.63 

.49 

1.53 

1.14 

.33 

.23 

.72 

13.37 

12.94 

2.61 

.91 

.60

.41 

.43 

.20

.22 

3.39 

14.30 

13.83 

3.36 

.96 

.70

.27 

.45 

1.82 

9.57 

7.73 

2.06 

.82 

.49

-

.38 

..30 

.28 

.27 

.51 

.54 

7.73 

7.70 

5.99 

1.88 

.84 

,64

27.06

Acre-feet

81,800 

58,600 

43,700 

25,400 

22,500 

71,300 

211,000 

652,000 

732,000 

246,000 

65,800 

33,100

2,240,000

30,200 

23,300 

73,800 

54,800 

15,800 

11,100 

34,800 

640,000 

619,000 

125,000 

43,500 

28,900

19,600 

20,600 

9,540

10,600 

163 ,000 

689,000 

666,000 

161,000 

45,900 

33,700

1,440 

21,400 

87 ,500 

459,000 

371,000 

99,000 

39,500 

23,600

1,100,000

18,400 

14,300 

13 ,400 

13,000 

24,600 

26,100 

371,000 

370 ,000 

287 ,000 

90,400 

40,500 

30,700

1,300,000
132 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Middle Pork of Flathead River at Bel ton, Mont. Continued

Month

1930-31

July ..........................

The year. ..................

1931-32

April.........................

... 1932-33

April.........................

The period ................

Discharge in second-feet

Maximum

1,010 

818 

524 

596 

622 

1,010 

5,470 

16,000 

6,600 

1,380 

818 

758

16,000

547 

1,080 

410 

330 

7,010 

3,730 

6,020 

25,200 

11,600 

5,130 

1,150 

758

25,200

818 

2,770 

2,640 

758 

476 

647 

11,400 

19,400 

23,400

_

Minimum

477 

454 

265 

238 

389 

349 

758 

3,730 

1,560 

701 

389 

368

238

368 

349 

295 

238 

265 

880 

1,380 

3,310 

4,960 

1,300 

647 

368

238

350 

622 

596 

331 

226 

331 

647 

4,180 

7,630

-

Mean

644

611 

397 

351 

496 

619 

2,180 

7,540 

3,280 

1,010 

547 

558

1,530

420 

577 

351 

287 

862 

1,300 

3,510 

10,300 

7,880 

2,480 

863 

502

2,440

538 

1,160 

1,070 

512 

356 

429 

2,670 

7,700 

15,200

-

Per 

square 

mile

0.716 

.679 

,441 

.390 

.551 

.688 

2.42 

8.38 

3.64 

1.12 

.608 

.620

1.70

.467 

.641 

.390 

.319 

.958 

1.44 

3,90 

11,40 

8,76 

2.76 

.958 

.558

2.71

.598 

1.29 

1.19 

.569 

,395 

.477 

2.97 

8.55 

16.9

-

Run- off

Inches

0.83 

.76 

.51 

.46 

.57 

.79 

2.70 

9.66 

4.06 

1.29 

.70 

.69

23.02

,54 

.72 

.45 

.37 

1.03 

1.66 

4.35 

13.14 

9.77 

3.18 

1.10 

,62

36.93

,69 

1.44 

1.37 

.65 

.41 

.55 

3.31 

9,86 

18.74

-

Acre-feet

39,600 

36,400 

24,400 

21,600 

27,500 

38,100 

130,000 

464,000 

195,000 

62,100 

33 ,600 

33,200

1,110,000

25,800 

34,300 

21,600 

17,600 

49,600 

79,900 

209,000 

633,000 

469,000 

152,000 

53,100 

29,900

1,770,000

33,100 

69,000 

65,800 

31,500 

19,800 

26,400 

159,000 

473,000 

904,000

1,780,000

Yearly discharge of Middle Pork of Plathead River at BeIton, Mont.

Year

1911

~[ Q1 O

1 QO1

1930..........

1931.......... 

1932..........

Year ending Sept. 30

Discharge in 

second-feet

Mean

2,480 

2,060 

3,380 

3,100 

1,800

1,530 

2,440

Per 

square 

mile

2.76 

2.29 

3.76 

3.44 

2.00

1.70 

2.71

Run- off

Inches

37.42 

31.08 

51.07 

46.78 

27.06

23.02 

36.93

Acre- feet

l,8uo,000 

1,490,000 

2,450,000 

2,240,000 

1,300,000

1,110,000 

1,770,000

Calendar year

Discharge in 

second-feet

Mean

2,310 

2,090 

3,350 

3.020 

1,870

1,500 

2,560

Per 

square 

mile

2.57 

2.32 

3,72 

3.35 

2.08

1.67 

2.84

Run-off

Inches

34.89 

31.55 

50.58 

45.59 

28.20

22.63 

38.72

Acre-feet

1,675,000 

1,514,000 

2,429,000 

2,186,000 

1,354,000

1,087,000 

1,861,000

South Pork of Plathead River near Columbia Palls, Mont.

Location.- Water-stage recorder, lat. 48°22', long. 114°03', in HEi sec. 17, T. 30 N., 

R. 19 W., 2 miles upstream from mouth and 9 miles east of Columbia Falls. Datum 

of gage is 3,031.3 feet above mean sea level, datum of 1929. September 1910 to 

September 1916, a chain gage, and Apr. 23, 1923, to Sept. 30, 1928, a recorder, at 

site at highway bridge if miles downstream.

Drainage area.- 1,640 square miles.

Records available.- September 1910 to September 1916, April 1923 to September 1938.

Extremes.- Maximum discharge observed, about 46,200 second-feet June 19, 1916 (gage 

height, 16.6 feet, site and datum then in use), from rating curve extended above 

20,000 second-feet; minimum discharge, 206 second-feet Dec. 6, 1935 (gage height, 

0.44 foot, ice on control).

Remarks.- No diversion or regulation above station.
PEND OREILLE RIVER BASIN 133

Monthly discharge of South. Pork of FLathead River near Ooliaibia Falls, Mont.'--Continued

Month

1911

May...........................

1911-12

1912-13

May...........................

July..........................

1923

July ..........................

1923-24

April .........................

May...........................

1924-25

n . 1925-26

July 26-31 .....................

1926-27

April 8-19 ....................

May...........................

1927-28

December 1-8 .. .........

fay. ... ... ..... .........

June .......................... July .........................

August ... . ........ .... ...

September .....................

Discharge in second-feat

Maximum

1,770 

2,390 

7,170 

17,500 

21,800 

7,920 

2,210 

1,170

-

1,520 

2, -040 

6,410 

14,100 

16,000 

10,500 

1,570 

2,210

1,520 

1,570 

1,120 

9,540 

35,600 

39,000 

12,400 

4,050

8,320 

20,900 

20,000 

6,490 

1,670 

788

779 

660 

622 

760 

5,900 

24,400 

12,600 

4,480 

1,240 

481

985 

1,33U 

731 

21,100 

22,300 

16,000 

8,260 

3,280 

1,260

985 

2,410 

890 

713

5,700 

2,310 

1,440 

26,400 

36,400 

12,300 

2,520 

2,020

4,730 

4,600 

6,010 

32,900 

15,700 

11,900 

2,350 

965

Miniimaa

1,170 

1,770 

1,300 

5,560 

9,540 

1,790 

663 

560

-

940 

860 

2,760 

4,780 

10,700 

1,420 

735 

930

735 

988

4,530 

3,380 

12,600 

3,600 

3,220

2,020 

4,860 

6,850 

1,730 

826 

417

345 

551 

551 

551 

544 

7,650 

4,680 

1,270 

518 

432

392 

704 

713 

10,000 

17,700 

6,480 

2,310 

1,200 

985

586 

1,160 

740 

460

2,310 

1,380 

1,260 

5,450 

11,700 

2,520 

1,060 

1,300

2,720 

2,530 

3,010 

8,850 

1U,100 

2,530 

1,000 

567

Mean

1,530 

1,980 

3,770 

12,200 

16,000 

4,160 

1,190 

830

-

1,130 

1,380 

5,030 

10,900 

12,500 

4,900 

1,090 

1,610

930 

1,250 

770 

6,130 

15,200 

27,200 

7,010 

3,780

4,960 

11,600 

11 ,400 

3,530 

1,230 

601

1 568 

564 

569 

632 

2,800 

15,200 

8,330 

2,410 

908 

453

553

913 

726 

14,400 

20,100 

11,300 

4,070 

1,860 

1,100

734 

1,560 

814 

547

3,290 

1,720 

1,330 

12,800 

22,100 

6,200 

1,580 

1,540

3,380 

3,380 

4,650 

22,300 

12,200 

5,580 

1,490 

715

Per 

square 

mile

0.933 

1.21 

2.30 

7.44 

9.76 

2.54 

.726 

.506

-

.689 

.841 

3.07 

6.65 

7.62 

2.99 

.665 

.982

.567 

.762 

.470 

3.74 

9.27 

16.6 

4.27 

2.30

3.02 

7.07 

6.95 

2.15 

.750 

.366

.346 

.344 

.347 

.385 

1.71 

9,27 

5.08 

1,47 

.554 

.276

.337 

.557 

.443 

8.78 

12.3 

6.89 

2.48 

1.13 

.671

.44S 

.951 

.496 

.333

2.01 

1.05 

.811 

7.80 

13.5 

3.78 

.963 

.939

2.06 

2.06 

2.48 

13.6 

7.44 

3.40 

.909 

.436

Run-off

Inohe

0.97 

1.40 

2.57 

8.58 

10.89 

2.93 

.84 

.56

M

.79 

.94 

2.74 

7.68 

8.50 

3.45 

.77 

1.10

.65 

.85 

.54 

1.53 

10.69 

18.52 

4.92 

.265

2.04 

8.15 

7.75 

2.48 

.86 

,41

,40 

.38 

.09 

.37 

1.91 

10.69 

5.67 

1.70 

.64 

.31

,38 

.62 

.13 

4.24 

3.20 

3..84 

2.49 

.71 

.55

.52 

.35

,11 

.28

1.79 

.90 

.36 

8.99 

15.06 

4.36 

1.11 

1.05

2.38 

2.30 

.65 

15.68 

8.30 

3.92 

1.05 

.49

Acre-feet.

85,000 

122,000 

224,000 

750,000 

952,000 

256,000 

73,200 

49 ,400

2,510,000

69,500 

82,100 

239,000 

670,000 

744,000 

301,000 

67,000 

95,800

57,200 

74,400 

47,300 

134,000 

935,000 

1,620,000 

431,000 

232,000

177,000 

713,000 

678,000 

217,000 

75,600 

35,800

34,900 

33,600 

7,900 

32,600 

167,000 

935,000 

496,000 

148,000 

55,800 

27,000

34,000 

54,300 

11,500 

371,000 

279,000 

336,000 

218,000 

62,700 

48,000

45 ,100 

30,900 

9,690 

25,000

157,000 

78,500 

31,700 

787,000 

1,32U,000 

381,000 

97,200 

91,600

208,000 

201,000 

55,300 

1,370,000

726,000 

343 ,000 

91,600 

42,500
134 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of South Pork of Plathead River near Columbia Palls. Moht..^ri^tiT«iBd

Month

1928-29

1929-30

The year ...................

1930-31

May...........................

September .....................

The year ...................

1931-32

1932-33

May...........................

July 1-10.....................

Discharge in second- feet

Maximum

1,170 

1,090

510 

470 

1,130 

6,900 

23 ,800 

16,500 

5,400 

1,170 

597

23 ,800

547 

465

846 

1,340 

14,600 

13,500 

11,200 

3,110 

936 

686

14,600

1,550 

849 

808 

864 

2,160 

7,080 

21,400 

11,600 

2,160 

928 

893

21,400

766 

1,270 

1,150 

759 

6,060 

4,120 

9,340 

29,100 

17,200 

6,900 

1,520 

999

29,100

1,240 

4,270

1,560 

1,200 

1,060 

15,900 

26-.-700 

36,500 

11,000

1,090

Minimum

614 

636

375 

390 

455 

728 

4,940 

6,060 

1,210 

554 

448

375

408 

292

258 

289 

243 

1,550 

5,890 

3,360 

973 

542 

488

243

697 

651 

560 

703 

728 

1,380 

7,080 

2,320 

825 

456 

409

409

509 

450 

498 

374 

379 

1,660 

2,480 

5,560 

7,620 

1,570 

893 

570

374

502 

1,020 

1,060 

845 

676 

728 

915 

6,080 

12,500 

6,260

845

Mean

915 

740 

528 

453 

430 

606 

2,110 

10,900 

10,600 

2,490 

811 

493

2,600

445 

392 

372 

309 

538 

470 

8,490 

9,180 

6,830 

1,860 

690 

558

2,510

922 

1,000 

758 

694 

755 

1,200 

3,300 

11 ,800 

5,660 

1,370 

618 

691

2,410

615 

820 

788 

552 

1,440 

2,130 

5,480 

14,500 

12,300 

3,480 

1,140 

719

3,660

832 

2,290 

1,910 

1,170 

910 

878 

4,010 

11,100 

25,000 

852

985

Per 

square 

mile

0.558 

.451 

.322 

.276 

.262 

.369 

1.29 

6.65 

6.46 

1.52 

.494 

.301

1.58

.271 

.239 

.227 

.188 

.328 

.286 

5.18 

5.60 

4.16 

1.13 

.421 

.340

1.53

,562 

.609 

.462 

.423 

,460 

.732 

2.01 

7.20 

3.45 

.835 

.377 

.421

1.47

.375 

.500 

.480 

.337 

.878 

1.30 

3.34 

8.84 

7.50 

2.12 

.695 

.438

2.23

.507 

1.40 

1.16 

.713 

.554 

.535 

2.44 

6.76 

15.20 

.519

.600

Run- off

Inches

0.64 

.50 

.37 

.32 

.27 

.42 

1.44 

7.67 

7.21 

1.75 

.57 

.34

21.50

.31 

.27 

.26 

.22 

.34 

.33 

5.78 

6,46 

4.64 

4.. 30 

.49 

.38

20.78

.65 

.68 

.53 

.49 

.48 

.84 

2.24 

8.30 

3.85 

.96 

.43 

.47

19.92

.43 

.56 

.55 

.39 

.95 

1.50 

3.73 

10.19 

8.37 

2,44 

.80 

.49

30.40

.58 

1.56 

1.34 

.82 

.58 

.62 

2.72 

7.80 

17.00 

.20

.22

Acre-feet

56 ,300 

44,000 

32,500 

27,900 

23 ,900 

37,300 

126,000 

670,000 

631,000 

153,000 

49,900 

29 ,300

1,880,000

27,400 

23,300 

22,900 

19,000 

29,900 

28,900 

505,000 

564,000 

406,000 

114,000 

42,400 

-33,200

1,820,000

56,700 

59,500 

46,600 

42,700 

41,900 

73,800 

196,000 

726,000 

337,000 

84,200 

38,000 

41,100

1,740,000

37,800 

48,800 

48,500 

33,900 

82,800 

131,000 

326,000 

892,000 

732,000 

214,000 

70,100 

42,800

2,660,000

51 ,100 

136,000 

117,000 

71,900 

50,500 

54,000 

239,000 

682,000 

1,490,000 

17,500

19,500
P2ND OREILLE RIVER BASIN 135

Monthly discharge of South Fork of Flathead River near Oolxmbla Palla. Mont. Contlmied

Month

1933-34

April.........................

May...........................

1934-35

May. ..........................

The yes r ...................

1935-36

April.........................

September. ....................

1936-37

September .....................

1937-38

April.... .....................

September. ....................

Discharge in second-feet

Maximum

12,800 

9,730

2,240 

4,550 

21,700 

20,800

3,240 

596

21,700

3,120 

3,600 

1,280 

1,980 

1,400 

1,700 

6,800 

26,100 

20,600 

6,440 

1,400

26,100

488 

450 

405

584 

16,100 

30,000 

20,800 

2,700 

903 

608

30,000

50§

5,950 

16 ,400 

11,700 

5,000 

1,410 

575

16,400

674 

1,060 

1,300 

1,340 

1,200 

1,300 

18,100 

22,800 

17,300 

4,960 

1,160 

668

22,800

Minimum

793 

2,360 

2,240

1,470 

1,640 

3,600 

11,200 

3,360

584 

500

500

461 

1,280 

686 

505 

805 

935 

772 

5,580 

6,440 

1,480

 *

461

337 

355 

209

319 

324 

10,500 

2,940 

919 

505 

430

209

5,470 

5,150 

1,210 

570 

444

«k

480 

652 

692 

756 

848 

674 

915 

5,420 

5,420 

1,200 

652 

471

471

Mean

2,899 

4,128 

3,504 

2,729 

2,042 

2,945 

11 ,770 

15,230 

6,920 

1,907 

775 

539

4,623

879 

2,064 

997 

924 

1,029 

1,280 

3,058 

12,750 

11,990 

3,213 

964 

574

3,317

451 

396 

313 

346 

349 

474 

7,222 

17 ,460 

7,140 

1,560 

676 

498

3,081

432 

361 

410 

266 

302 

402 

2,020 

11 ,360 

8,780 

2,296 

873 

504

2,344

551 

824 

961 

957 

946 

939 

5,312 

11,620 

10,470 

2,622 

893 

568

3,059

Per 

square

mile

1.77 

2.52 

2.14 

1.66 

1.25 

1.80 

7.18 

9.29 

4.22 

1.16 

.473 

.329

2.82

.536 

1.26 

.608 

.563 

.627 

.780 

1.86 

7.77 

7.31 

1.96 

.588 

.350

2.02

.275 

.241 

.191 

.211 

.213 

.289 

4.40 

10,6 

4,35 

.951 

.412 

.304

1.88

.263' 

.220 

.250 

.162 

.184 

.245 

1.23 

6.93 

5.35 

1.40 

.532 

.307

1.43

,336 

.502 

,586 

.584 

.577 

.573 

3.24 

7.09 

6.38 

1.60 

.545 

.346

1.87

Run-off

Inches

2.04 

2.81 

2.47 

1.91 

1.30 

2.08 

8.01 

10.71 

4.71 

1.34 

.55 

.37

38.30

,62 

1.41 

.70 

.65 

.65 

.90 

2.08 

8.96 

8.16 

2.26 

.68 

.39

27.46

.32 

.27 

.22 

.24 

.23 

.33 

4.91 

12.22 

4.85 

1.10 

.48 

.24

25.51

.30 

.25 

.29 

.19 

.19 

.28 

1.37 

7.99 

5.97 

1.61 

.61 

.34

19.39

.39 

.56 

.68 

.67 

.60 

.66 

3.62 

8.17 

7.12 

1.84 

.63 

.39

25.33

Acre-feet

178,300 

245,600 

215,400 

167,800 

113,400 

181,100 

700,3.00 

936,200 

411,800 

117,200 

47,650 

32,050-

3,347,000

54,070 

122,800 

61,290 

56 ,790 

57,130 

78,730 

181,900 

784,200 

713 ,500 

197 ,600 

59,290 

34,140

2,401,000

27,750 

23,550 19,230- 

21,270 

20,080 

29,120 

429,700 

1,074,000 

424,900 

95,930 

41,560 

29 ,620

2,237,000

26,580 

21,510 

25,230 

16,350 

16,750 

24,710 

120,200 

698,300 

522,500 

141,200 

53,680 

29,970

1,697,000

33,850 

49,030 

59,100 

58,840 

52,550 

57,740 

316,100 

714,600 

623,100 

161,200 

54,920 

33 ,780

2,215,000
136 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Yearly discharge of South Fork of Plathead River near Columbia Falls, Mont.

Year

3,929 ..........

1930,...,.,,..

1931.,..,,...,

1932.....,,...

1934..........

1935..,..,..., 

1936..........

1'937... .......

1938....,,.,,.

Year ending Sept. 30

Discharge In 

second-feet

Mean

2,600 

2,510 

2,410 

3,660 

3,31V 4.6231 

3,081 

2,344 

3,059

Per 

square 

mile

1.58 

1.53 

1.47 

2.23 

2.82

2. 02

1.88 

.43 

1.87

Run-off

Inches

21,50 

20.78 

19.92 

30.40 

38,30

27.46 

25.51 

19.39 

25.33

Acre-feet

1,880,000 

1,820,000 

1,740,000 

2,660,000 

3,347.000

2,401,000 

2,237,000 

1,697,000 

2,215,000

Calendar year

Discharge In 

second-feet

Mean

2,520 

2,630 

2,370 

3,900 

4,069

3J686 

3,086 

2,439

Per 

square 

mile

1.53 

1.60 

1.45 

2,38 

2,48

1.86 

1.88 

1.49

Run-off

Inches

20.83 

21,80 

19.60 

32,54 

33.71

25.54 

25.54 

20.18

Acre feet

1,822,000 

1,905,000 

1,716,000 

2,829,000 

2,946,000

2,234,000 

2,240,000 

1,766,000

Stlllwater River near Whltefish, Mont.

Location.- Water-stage recorder, lat. 48°19', long. 114°23', In SW$ sec. 34, T. 30 ,N., R.

22 W., 60O feet downstream from highway bridge 7 miles southwest of Whlteflsh, and 10

miles upstream from Whiteflsh Creek. 

Records available.- November 1930 to September 1938. 

Extremes.- Maximum discharge, 2,680 second-feet Apr. 28, 1934 (gage height, 14.47 feet);

minimum, 55 second-feet (estimated) Jan. 20-22, 1937, Ice present. 

Remarks.- Some regulation for logging operations during summer. No diversion.

Monthly discharge of Stlllwater Rlvor near Whltefish, Mont.

Month

1930-31

April. ...........................................

July. ............................................

1931-32

1932-33

1933-34

April. . ..........................................

Discharge in second-feet

Maximum

92 

90 

104 

131 

206 

498 

825 

464 

218 

98 

72

66 

81 

87 

102 

118 

244 

1,160 

1,910 

1,760 

785 

238 

162

1,910

130 

192 

174 

146 

120 

143 

1,550 

1,870 

1,930 

885 

264 

174

1,930

321 

398

321 

905 

2,680 

2,520 

985 

414 

162 

99

2,680

Minimum

64 

61 

62 

82 

98 

186 

464 

225 

100 

62 

58

62 

62 

60

72 

63 

87 

225 

_ 1,120 

805 

251 

162 

100

60

102 

131 

98 

100 

89 

112 

156 

1,280 

905 

264 

151 

140

89

121 

218 

192 

306

965 

1,000 

430 

162 

98 

88

88

Mean

78.6 

73.6 

78.7 

102 

143 

366 

663 

331 

155 

76.1 

67.0

_

64.0 

70.2 

73.1 

87.6 

74.5 

141 

720 

1,610 

1,290 

454 

194 

126

409

116 

160 

121 

122 

103 

121 

466 

1,570 

1,570 

497 

203 

155

435

165 

291 

295 

495 

274 

513 

1,855 

1,556 

651 

265 

120 

93.5

548

Run-off in

acre-feet

3,590 

4,530 

4,840 

5,660 

8,790 

21,800 

40,800 

19,700 

9,530 

4,680 

3,990

128,000

3,940 

4,180 

4,490 

5,390 

4,290 

8,670 

42,800 

99,000 

76,800 

27,900 

11,900 

7,500

297,000

7,130 

9,520 

7,440 

7,500 

5,720 

7,440 

27,700 

96,500 

93,400 30,600" 

12,500 

9,220

315,000

10,130 

17,340 

18,130 

30,410 

15,240 

31,530 

110,400 

95,660 

38,730 

16,290 

7,360 

5,570

396,800
PEND OREILLE PIVER BASIN 137

Monthly discharge of Stillwater River near WMtefish, Mont. Continued

Month

1934-35

May...........................................

1935-36

1936-37

May...........................................

September .....................................

1937-38

Discharge in second-feet

Maximum

180 

225 

168 

136 

140 

156 

1,260 

2,220 

1,750 

709 

258 

146

2,220

103 

117 

104 

110

93 

1,750 

1,620 

785 

314 

117 

84

1,750

74 

77 

129 

70 

87 

87 

566 

1,240 

985 

464 

168 

91

1,240

87 

107 

112 

102

986 

1,260 

1,220 

512 

197 

134

1,260

Minimum Mean

96 

151 

123 

119 

125 

112 

113 

1,260 

728 

264 

146 

94

94

80 

88 

75 

75

79 

71 

785 

328 

120 

73 

70

69 

63 

58 

55 

60 

70 

83 

583 

498 

162 

92 

75

55

59 

82 

73 

79

102 

929 

546 

203 

120 

103

59

115- 

188 

137 

127 

130 

138 

434 

1,711 

1,154 

470 

186 

115

410

96.0 

98.0 

90.3 

94.4 

66.4 

85.3 

657 

1,196 

525 

189 

89.7 

76.5

272

71.6 

68.6 

75.5 

60.8 

74.1 

78.0 

214 

1,045 

714 

274 

130 

81.7

242

77.8 

94.1 

94.2 

92.7 

94.3 

107 

525 

1,070 

776 

359 

155 

116

297

Run-off In 

acre-feet

7,050 

11,120 

8,390 

7,800 

7,210 

8,460 

25,850 

105,200 

68,670 

28,880 

11,440 

6,820

296,900

5,900 

5,830 

5,550 

5,810 

3,820 

5,240 

39,100 

73,520 

31,260 

11,600 

5,510 

4,550

197,700

4,400 

4,080 

4,640 

3; 740 

4,110 

4,790 

12,730 

64,260 

42,490 

16,820 

7,970 

4,860

174,900

4,790 

5,600 

5,790 

5,700 

5,240 

6,570 

31,240 

65,780 

46,170 

. 22,060 

9,540 

6,910

215,400

Yearly discharge of Stlllwater River near Whlteflsh, Mont.

Year

1931 .............

1932 .............

1933 .............

1934 .............

1935 .............

1937 .............

1938 ...... ......^

Year ending Sept. 30

Mean discharge 

In second-feet

409 

435 

548 

410

272 

242 

297

Run-off in 

acre-feet

297,000 

315,000 

396,800 

296,900

197,700 

174,900 

215,400

Calendar year

Mean discharge 

In second-feet

183 

425 

464 

522 

397

267 

246

Run-off in 

acre-feet

132,400 

308,300 

336,200 

377,800 

287,600

193,600 

178,000

StllLwater River near Kallspell, Kont.

Location.- Staff gage, lat. 48°17', long. 114°20', In NEj sec. 14, T. 29 H., R. 22 W., 

«?nnvR»o^ bridge 5 miles north of Kallspell.

T»v,n_ _ . n j.. ,.._..-^ ,noo T., \vm uo oeptBinoei- i»vJU.

sond-feet Mav 22. 1928 (sa«e helftht.

 oot),
138 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Stillwater River near Kalispell, Mont.

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1922

April 27-30.................

May.........................

June........................

July........................

August......................

1928 

June 25-30..................

July........................

August......................

September...................

The period................

1928-29 

October.....................

November....................

March 20-31.................

April.......................

May.........................

June........................

July........................

August......................

September...................

1929-30 

October.....................

November....................

December....................

January..... T ...............

February....................

March.......................

April................... ....

May.........................

June........................

July................. 1......

August......................

September...................

The year..................

1930 

October.....................

November 1-7................

338

2,750

1,860

647

230

1,600

1,190

362

249

128

238

146

471

1,160

1,040

581

261

108

300

154

105

96

97

120

658

1,060

1,340

284

135

120

1,340

234

334

370

220

184

261

1,340

990

398

208

908

238

142

52

1,240

707

246

113

68

55

90

116

471

405

102

85

35

93.5

115

105

186

827

798

261

131

64.7

31

53

35

58

55

112

305

264

84

73

112

72.5

82.4

52.4

74.5

84.9

257

570

618

187

98.1

87.0

192

101

106

2,070

82,400

58,900

24,500

12,800

14,800

43,500

15,100

6,720

80,100

5,750

6,840

2,500

11,100

50,800

47,500

16,000

8,060

5.850

6,890

4,310

5,070

3,220

4,140

5,220

15,300

35,000

36,800

11,500

6,030

5,180

139,000

6,210

1,470

Logan Creek at Tally Lake, near Whitefish, Mont.

Location.- Staff gage, lat- 48°27', long. 114°34», in Nl»i sec. 17, T. 31 N., R. 23 W., 

 about 2| miles north of Tally Lake and 10 miles west of Whitefish. August 1931 to

September 1934, staff gage at site 2| miles upstream.

Records available.- August 1931 to September 1934, April 1936 to September 1938. 

Extremes.- Maximum gage height, 7.22,feet May 28, 29, 1933 (discharge not determined);

minimum discharge, 0.8 second-foot Sept. 6, 1931. 

Remarks.- No diversion. Natural storage In Tally Lake.

Monthly discharge of Logan Creek at Tally Lake near Whitefish, Mont.

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

August 20-31. 

September....

October.......

November......

December 1-20. 

March 16-31... 

April 1-16-... 

July 7-31.....

August........

September.....

1931-32

3.5 

7.4

10.8

22.2

14.8

29

203

156

25.4

19.0

2.2 

1.2

5.4

10.3

10.3

19.0

30

27

16.2

10.3

2.92

4.05

7.80

15.6

12.2

24.2

75.1

61.5

20.5

14.4

69

241

480

928

484

768

2,380

3,050

1,260

857
PEND OREILLE RIVER BASIN 139

Monthly discharge of Logan Creek at Tally Lake near Whitefish, Mont. Continued

Month

1932-33

April 1-26............. ........................

1934

July. ..........................................

The period ...................................

1936

July. ..........................................

1936-37

May. ...........................................

1937-38

April ..........................................

Discharge in second-feet

Maximum

24.6 

41 

40 

27.0 

21.4 

23.8 

206

431 

216 

80 

16.9 

9.1

_

680 

fS4 

43 

9.4 

9.8

_

13 

14 

23

16 

149 

515 

200 

98 

24 

5.5

515

14 

19 

24 

24 

19 

25 

360 

590 

280 

106 

21 

19

590

Minimum

12.7 

23.8 

18.3 

19.8 

15.5 

19.0 

23.8

203 

67 

18.3 

9.1 

9.1

_

142 

45 

9.8 

5.1 

5.1

_

9.4 

12 

13

15 

160 

102 

25 

5.8 

4.5

_

5.5 

14 

16 

18 

16 

17 

25 

298 

110 

24 

7.8 

7.4

5.5

Mean

19.4 

31.5 

24.5 

23.1 

18.6 

20.7 

54.4

296 

136 

41.5 

11.6 

9.10

_

400 

83.4 

23.7 

6.49 

8.52

_

11.5 

12.9 

15.6 

7.37 

9.66 

13.8 

43.3 

344 

150 

50.0 

14.2 

5.01

56.9

11.8 

16.4 

19.2 

20.0 

17.9 

19.2 

153 

383 

149 

62.8 

11.8 

14.4

73.5

Run- off 

in 

acre-feet

1,190 

1,870 

1,510 

1,420 

1,030 

1,270 

2,810

11,100

8,220 

8,080 

2,550 

711 

271

19,830

24,570 

4,960 

1,460 

399 

507

31,900

708 

770 

960 

453 

537 

849 

2,580 

21,170 

8,910 

3,070 

873 

298

41,180

724 

974 

1,180 

1,230 

996 

1,180 

9,090 

23,540 

8,870 

3,860 

725 

858

53,230

Logan Creek near Whitefish, Mont.

Location.- Staff gage, lat. 48°29', long. 114°33', in NEi sec. 4, T. 31 H., R. 33 W.,

just upstream from Good Creek, 20 miles west of Whitefish. 

Records available.- April to September 1931. 

Extremes.- Maximum discharge observed, 240 second-feet May 8 (gage-height, 2.48 feet);

mTnEaum observed, 1.2 second-feet, Sept. 4-5 (gage height, 0.34 foot). 

Remarks.- Ho diversion. Natural storage at Tally Lake 5 miles upstream.

Monthly discharge of Logan Creek near Whitefish, Mont.

Month

1931 

April 17-30. ..................................

July. .........................................

September. ....................................

The period ..................................

Discharge in second-feet

Maximum

188 

240 

87 

34 

12 

7.4

-

Minimum

132 

100 

35 

8.7 

2.0 

1.2

-

Mean

167- 

168 

53.6 

22.9 

5.31 

4.02

-

Run- off 

in 

acre-feet

4,360 

10,300 

3,190 

1,410 

326 

239

19,800
140 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Whitefiah Creek near Kaliapell, Mont.

Location.- Water-stage recorder, lat. 48°19>, long. 114°16', In SWj sec. 34, T. 30 H.,

R. 21.W., 8 milea north of Kalispell and 8 milea upstream from mouth. Datum of gage

ia 2,969.7 feet above mean sea level, datum of 1929. 

Recprda available.- November to December 1906 (gage heights only), July 1928 to September

1938. 

Extremes.- Maximum discharge, 1,260 second-feet June 3, 1932 (gage height, 4.26 feet);

minimum, 4.5 second-feet Oct. 18, 1934 (gage height, 0.83 foot). 

Remarks.- No diveraion. Some regulation at Whitefiah Lake.

Monthly discharge of Whitefiah Creek near Kalispell, Mont.

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1928

July 14-31..................................... 460 265

August......................................... 250 116

September...................................... ___126 84

The period..................................

1928-29

October........................................ 102 49

November....................................... 93 70

March 15-31.................................... 116 63

April.......................................... 178 63

May............................................ 637 178

June........................................... 684 165

July........................................... 368 105

August......................................... 102 22

September...................................... 76 22

1929-30 = ==

October........................................ 63 7.2

November....................................... 68 14

December....................................... 59 26

January........................................ 56 16

February....................................... 70 26

March.......................................... 116 22

April.......................................... 347 41

May............................................ 368 88

June........................................... 827 88

July........................................... 212 88

August......................................... 102 52

September...................................... ____52 19

The year.................................... 827 7.2

1930-31 "~ = ===

October............................... ......... 17 7.2

November....................................... 140 9.8

December....................................... 49 35

January........................................ 54 28

February....................................... 82 23

March.......................................... 140 66

April.......................................... 227 122

May............................................ 643 248

June........................................... 453 234

July........................................... 230 102

August......................................... 103 15

September...................................... _____54 15

The year.................................... 645 7.2

1951-52 

October........................................ 125 27

November....................................... 101 59

December.......................................

January........................................

February.......................................

March.......................................... 117

April.......................................... 472 96

May............................................ 1,070 420

June........................................... 1,230 574

July........................................... 533 145

August......................................... 137 91

September...................................... _____143 79

The year.................................... 1,230 27

350

145

102

76.0

82.1

81.4

89.0

397

563

213

39.7

54.3

19.7

29.2

44.4

35.9

45.0

58.6

141

295

406

128

61.5

39.1

106

8.36

29.8

42.6

40.8

41.5

95.3

163

463

326

148

29.5

25.9

118

68.6

78.1

56.6

71.6

64.8

78.1

275

799

914

318

117

102

245

12,500

8,920

6,070

17,500

*4,670 

«4,890

*2,740

*5,300

*24,400

*33,500

*13,100

*2,440

*3,230

1,210

1,740

2,730

2,210

2,500

3,600

8,390

18,100

24,200

7,870

3,780

2,330

78,700

514

1,770

2,620

2,510

2,300

5,860

9,700

28,500

19,400

9,100

1,810

1.420

85,500

4,220

4,650

3,480

4,400

3,730

4,800

16,400

49,100

54,400

19,600

7,190

6,070

178,000

* Previously published figure ia erroneous.
PEND OREILLE RIVER BASIN 141

Monthly discharge of Vihitefish Creek .near Kalispell, Mont. Continued

Month

1938-33

April ..........................................

September ......................................

The year ....................................

1933-34

1934-35

September ......................................

1935-36

1936-37

September ......................................

The year ....................................

Discharge in second-feet

Maximum

94 

174 

178

185

408 

721 

1,140 

742 

807 

143

1,140

158 

817 

306 

856 

177 

340 

960 

988 

850 

389 

149 

158

988

106 

814 

167 

157 

157 

93 

868 

856 

905 

682 

888 

810

905

164 

164 

59

407 

530 

856 

690 

174 

88 

157

856

100 

48 

58

 885 

194 

614 

661 

385 

111 

81

661

Minimum

89 

86 

35

84 

59 

114 

397 

764 

200 

128 

109

24

91 

155 

. 140 

177 

43 

49 

175 

806 

171 

45 

14 

7.5

7.5

5.0 

11 

17 

35 

35 

68 

78 

348 

668 

235 

17 

9.8

5.0

8.0 

7.5 

9.8

93 

80 

547 

187 

88 

80 

44

7.5

85 

13 

14

83

135 

389 

108 

84 

25

13

Mean

54.8 

59.7 

86.8 

86 

67 

105 

186 

504 

970 

379 

169 

119

832

110 

177 

831 

809 

157 

151 

549 

868 

551 

288 

64.5 

59.3

880

40.0 

117 

101 

74.2 

85.1 

81.2 

144 

566 

883 

393 

99.8 

91.8

818

81.6 

48.8 

83.0 

89.7 

25.5 

818 

849 

693 

391 

180 

53.8 

88.7

167

46.8 

80.1 

32.5 

86.5 

37.9 

137 

113 

388 

580 

835 

98.3 

68.0

143

Run- off 

in 

acre-feet

3,370 

3,550 

5,300 

5,290 

3,780 

6,460 

11,100 

31,000 

57,700 

83,300 

10,400 

7,080

168,000

6,750 

10,580 

14,280 

18,870 

8,720 

9,300 

38,660 

53,400 

38,760 

13,670 

3,970 

3,530

808,400

2,460 

6,930 

6,800 

4,500 

4,730 

4,99k3 

8,560 

34,820 

48,940 

84, 180 \ 

6,140 

5,460

158,000

5,080 

8,510 

1,410 

1,880 

1,470 

13,050 

48,590' 14,790 

83,850 

7,350 

3,270 

4,920

181,400

8,840 

1,800 

8,000 

1,630 

8,100 

8,410 

6,710 

83,840 

30,960 

14,440 

6,040 

3,690

103,900

527283 0-43-10
142 SUTiFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Whitefish Creek near Kalispell, Mont. Continued

Month

1937-38

May ...........................................

Discharge in second-feet

Maximum

40 

144 

81 

19

86 

312 

758 

758 

435 

205 

255

758

Minimum

5.2 

5.2

10

67 

324 

452 

132 

24 

18

5.2

He an

24.7 

95.1 

32.6 

13.9 

15.5 

63.0 

158 

496 

660 

226 

118

1*1

168

Run-off 

in 

acre-feet

1,520 

5,660 

2,010 

853 

863 

3,880 

9,370 

30,500 

39,300 

13,870 

7,270 

6,610

121,700

Yearly discharge of Whitefish Creek near Kalispell, Mont.

Year

1 Q*^T

1 Q*^*^

1934 ...........

1935 ...........

1937 ...........

1938 ...........

Year ending Sept. 30

Mean discharge 

in second-feet

106 

118 

245 

232 

280

218 

167 

143 

168

Run- off in 

acre-feet

78,700 

85,500 

178,000 

163,000 

202,400

158,000 

121,400 

103,900 

121,700

Calendar year

Mean discharge 

in second-feet

108 

128 

245 

259 

258

209 

163 

148

Run- off in 

acre-feet

77,900 

93,000 

178,000 

188,000 

186.500

151,300 

118,600 

107,000

Ashley Creek near Kila, Mont.

Location.- Staff gage, lat. 48°10', long. 114°36', in sec. 25, T. 28 N., R. 24 W., l 

miles downstream from outlet of Ashley Lake and 7 miles northwest of Kila.

Records available.- July to December 1916.

Extremes.- Max.imum discharge observed, 20.2 second-feet Aug. 9 (gage height, 1.82 

feet); minimum observed, 4.2 second-feet Sept. 29 (gage height, 1.14 feet).

Remarks.- No diversion. Flood water stored in Ashley Lake for release during irrigation season.

Monthly discharge of Ashley Creek near Kila, Mont.

Month

1916 

July 23-*31 .....................................

Discharge in second-feet

Maximum

18 

20 

16 

20 

19 

18

-

Minimum

17 

14 

7.8 

15 

12 

15

-

Mean

17.9 

15.7 

14.2 

17.4 

15.1 

16.9

-

Run-off 

in 

acre-feet

320 

965 

845 

1,070 

898 

637

4,740

Ashley Creek near Kallspell, Mont.

Location.- Wire-weight gage, lat. 48°11', long. 114°24', in SEf sec. 16, T. 28 N., R. 22

W.,4miles west of Kalispell.

Records available.- April 1931 to March 1933, April 1934 to September 1938. 

.Extremes.- Maximum discharge observed, 285 second-feet Apr- 26, 1934 (gage height. 9.30

reet); no flow at times. 

Remarks.- Some diversions. Natural storage in Smith Lake.
PEND OREILLE RIVER BASIN 143

Monthly discharge of Ashley Creek near Kalispell, Mont 

Month

1931

1931-32

1932-33

1934

 1934-35

May. ..........................................

1935-36

Hay...........................................

Discharge In second-feet

Maximum

8.1 

44 

29 

25 

5.9 

0

-

0 

0 

0 

0 

0

86 

124 

68 

18 

12 

6.1

-

13.8 

16.8 

18.3 

0 

0 

0

-

178 

94 

60 

40 

32

-

24 

26 

18 

49 

40 

40 

119 

166 

124 

40 

35 

20

166

14 

9.5 

9.5

53 

148 

154 

53 

40 

3.2 

5.2

154

Minimum

1.0 

12 

5.9 

3.2 

0 

0

-

0 

0 

0 

0 

0 

0 

. 19 

68 

12 

6.4 

1.1 

1.1

-

.2 

1.1 

0 

0 

0 

0

-

99 

32 

16 

29 

21

-

7.4 

5.0 

7.0 

7 

11 

11 

21 

109 

34 

34 

3.5 

8.2

3.5

5.5 

.8

33 

26 

3.2 

0 

.5

0

Mean

3.99 

26.7 

17.1 

11.7 

.94 

0

-

0 

0 

0 

0 

0 

7.1 

50.7 

97.1 

40.2 

11.9 

4.49 

2.70

-

3.32 

6.72 

1.28 

0 

0 

0

-

135 

63.6 

35.6 

35.9 

26.7

-

15.8 

15.6 

12.7 

21.2 

19.6 

23.0 

58.0 

130 

58-1 

36.9 

14.8 

15.0

35.2

10.1 

6.95 

5.98 

4.89 

1.15 

18.6 

66.6 

104 

42.2 

18.0 

1.33 

3,01

23.6

Run- off 

in 

acre-feet

87 

1,640 

1,020 

720 

58 

0

3,520

0 

0 

0 

0 

0 

437 

3,020 

5,970 

' 2,390 

732 

276 

161

13,000

204 

400 

78 

0 

0 

0

682

3,480 

3,790 

2,190 

2,210 

1,590

13,260

971 

928 

778 

1,300 

1,090 

1,420 

3,450 

7,990 

3,460 

2,270 

907 

894

25,460

621 

413 

368 

300 

66 

1,140 

3,960 

6,370 

2,510 

1,110 

82 

179

17,120
144 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Ashley Creek near Kalispell, Mont. Continued

Month

1936-37

April ..........................................

May. ..................................

July. ..........................................

1937-38

April. . ........................................

July. ..........................................

Discharge In second-feet

Maximum

4.0 

2.4

1.4 

20 

56 

53 

49 

37 

26 

2.0

56

3.7 

4.0

37 

37 

60 , 

60 

31 

14 

13

60

Minimum

0.5 

.1

.5 

1.0 

24 

20 

36 

28 

.9 

0

0

0 

0

18 

23 

32 

14 

7.4 

6.4

0

iiean

2.71 

1.68 

1.90 

1.50 

.98 

3.94 

35.2 

35.0 

42.5 

32.4 

8.27 

.14

13.9

1.02 

.99 

2.5 

3.0 

2.0 

8.90 

32.4 

44.8 

39.5 

21.7 

9.85 

9.65

14.7

Run-off 

in 

acre-feet

167 

100 

117 

92 

54 

242 

2,090 

2,150 

2,530 

1,990 

509 

8.1

10,050

63 

59 

154 

184 

111 

547 

1,930 

2,760 

2,350 

1,330 

606 

574

10,670

Swan River near Big Pork, Mont.

Location.- Water-stage recorder, lat. 48°01', long. U3°59«, in HWj see. 14, T. 26 N., 

R. 19 W., at cutlet of Swan Lake, 7 miles southeast of village of Big Pork.

Drainage area.- 647 square miles.

Records available.- April 1922 to September 1938. October 1910 to May 1911 (gage 

heights onlyj at site 2 miles upstream from Swan Lake.

Extremes.- Minimum discharge, 8,280 second-feet June 18, 1933 (gage height, 7.00 feet)j 

minimum, 85 second-feet Jan. 26-29, 1930 (gage height, (3.04 foot).

Remarks.- No diversion. Natural storage in Swan Lake.

Monthly discharge of Swan River near Big Fork, Mont.

Month

1922

M

n-v

1922-23

April.........................

Mfl-v

The year ...................

Discharge In second- feet

Maximum

1,700 

4,530 

5,440 

1,980 

768 

562

424 

393 

490 

562 

354 

414 

1,720 

4,000 

4,680 

2,420 

924 

556

4,680

Minimum

1,540 

1,640 

2,040 

783 

526 

424

374 

345 

318 

364 

368 

368 468' 

1,490 

2,440 

933 

569 

378

268

Mean

"1,640 

2,910 

3,770 

1,240 

646 

498

397 

366 

358 

478 

a320 

280 

1,090 

2,5fcO 

3,120 

1,600 

681 

435

973

Per 

square 

mile

2.53 

4.50 

5.83 

1.92 

.998 

.769

.614 

.566 

.553 

.739 

.495 

.433 

1.68 

3.89 

4.82 

2.47 

1.05 

.672

1.50

Run- off

Inches

0.28 

5.19 

6.50 

2.21 

1.15 

.86

.71 

.63 

.64 

.85 

.52 

.50 

1.87 

4.48 

5.38 

2.85 

1.21 

.75

20.39

Acre-feet

9,760 

179,000 

224,000 

76,200 

39,200 

29,600

 24,400 

21,800 

22,000 

29,400 

17,800 

17,200 

64,900 

155,000 

186,000 

98,400 

41,900

705,000

a Partly estimated.
TEND OREILLE RIVER BASIN 145

Monthly discharge of Swan River near Big Pork, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum

Per 

aquare 

mile

Run-off

Inches Acre-feet

1923-24

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May................

June...............

July...............

August.............

September..........

The year........

1924-25 

October............

November...........

December ^-13.....

March 22-31 ........

April..............

May................

June...............

July...............

August.............

September..........

^925-26 

October............

November...........

December...........

March 21-31........

April..............

May................

June...............

July...............

August.............

September..........

1926-27 

Oct ober............

November...........

December...........

March 13-31........

April..............

May................

June...............

July...............

August.............

September..........

1927-28 

October............

November...........

December...........

March 4-31.........

April..............

May................

June...............

July...............

August.............

September..........

1928-29 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

430

474

451

331

520

474

1,600

5,330

2,890

1,600

608

443

340

340

331

280

314

409

419

1,660

1,650

634

443

360

397

372

385

300

435

435

1,120

3,660

2,270

1,050

517

389

0.614

.575

.595

.464

.672

.672

1.73

5.66

3.51

1.62

.799

.601

0.71

.64

.69

.53

.72

.77

1.93

6.52

3.92

1.87

.92

.67

5,330 280 946 1.46 19.89

433

620

505

1,490

4,560

6,660

4,620

3,100

1,110

806

655

560

770

1,150

3,860

3,700

2,250

1,300

479

655

1,560

1,560

2,120

720

4,190

4,700

6,860

4,360

1,460

980

1,160

1,890

2,000

1,710

4,140

7,820

5,460

4,640

1,580

910

352

424

414

706

1,670

2,280

2,750

1,020

722

634

505

479

505

770

690

1,780

1,200

505

404

532

568

640

7SO

530

805

2,000

2,780

1,460

848

720

762

890

805

640

1,460

3,070

3,220

1,710

910

560

381

517

449

980

3,230

4,470

3,380

1,700

885

716

562

512

595

991

1,870

2,590

1,680

810

442

603

977

912

1,210

617

1,530

3,180

5,170

2,570

1,050

882

1,510

1,280

1,100

2,060

5,470

3,960

2,830

1,150

712

.589

.799

.694

1.51

4.99

6.91

5.22

2.63

1.37

1.11

.869

.791

.920

1.53

2.89

4.00

2.60

1.25

.683

.932

1.51 

1.41 

1.87

.954 

2.36 

4.91- 

7.99 

3.97 

1.62 

1.36

1.54

2.33

1.98

1.70

3.18

8.46

6.12

4.37

1.78

1.10

.68

.89

.34

.56

5.57

7.97

5.82

3.03

1.58

1.24

1.00

.88

1.06

.63

3.22

4.61

2.90

1.44

.79

1.04

1.74

1.57

2.16

.67

2.63

5.66

8.91

4.58

1.87

1.52

1.78

2.60

2.28

1.77

3.55

9.75

6.83

5.04

2.05

1.23

815

682

560

522

329

600

2,100

5,300

4,310

2,500

815

454

560

560

420

329

273

300

560

1,840

2,500

815

454

358

726

607

479

423

300

407

938

2,900

3,400

1,460

583

390

1.12

.938

.740

.654

.464

.629

1.45

4.48

5.26

2.26

.901

.603

1.29

1.05

.85

.75

.48

.73

1.62

5.16

5.87

2.61

1.04

.67

24,200

22,100

23,700

18,400

25,000

26,700

66,600

225,000

135,000

64,600

31,800

23,100

686,000

23,400

30,800

11,600

19,400

192,000

275,000

201,000

105,000

54,400

42,600

34,600

30,500

36,600

21,600

111,000

159,000

100,000

49,800

27,200

35,900

60,100

54,300

74,400

23,300

91,000

196,000

308,000

158,000

64,600

52,500

61,400

89,800

78,700

61,100

123,000

336,000

236,000

174,000

70,700

42,400

44,600

36,100

29,500

26,000

16,700

25,000

55,800

178,000

202,000

89,800

35,800

23,200

5,300 273 1,050 1.62 22.12 762,000
146 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Swan River near Big Fork, Wont. Continued

Month

Discharge in second-feet

Maximum Minimum square 

mile

Run-off

Inches Acre-feet

1929-30 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

- The year........

1930-31 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1931-32 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1932-33 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1933-34 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

358

560

389

246

389

2,780

2,780

2,920

1,580

560

408

323

268

257

85

93

133

454

1,580

1,710

560

289

246

366

308

404

218

168

180

1,730

2,210

2,220

1,020

411

319

0.566

.476

.624

.337

.260

.278

2.67

3.42

3.43

1.58

.635

.493

0.65

.53

.72

.39

.27

.32

2.98

3.94

3.83

1.82

.73

.55

2,920 85 796 1.23 16.73

725

630

432

409

414

884

1,130

4,950

3,310

1,050

506

532

346

404

335

320

355

350

730

1,140

1,100

480

325

306

495

495

386

354

382

545

949

2,930

2,210

705

399

421

.765

.765

.597

.547

.590

.842

.47

.53

.42

.09

.617

.651

.88

.85

.69

.63

.61

.97

1.64

5.22

3.82

1.26

.71

.73

4,950 306 858 1.33 18.01

480

480

387

365

486

804

2,880

5,520

4,570

3,310

922

601

355

355

315

315

279

438

855

1,690

2,540

940

673

474

401

414

359

348

315

587

1,940

3,460

3,680

1,800

699

516

.620

.640

.555

.538

.487

.907

3.00

5.35

5.69

2.78

1.08

.798

.71

.71

.64

.62

.53

1.05

3.35

6.17

6.35

3.20

1.24

5,520 279 1,210 1.87

638

1,050

931

578

442

533

3,050

3,130

8,280

4,050

1,030

626

438

608

533

435

310

404

563

1,610

3,660

1,070

586

533

551

792

653

503

386

437

1,200

2,230

5,750

2,150

765

571

.852

1.22

1.01

.777

.596

.675

1.85

3.45

.32 

.18 

.882

.98

1.36

1.16

.90

.62

.78

2.06

3.98

9.92

3.83

1.36

310 1,330

2,200

1,540

4,550

1,980

905

1,400

3,750

3,560

3,560

1,380

602

429

483

770

797

925

709

726

1,570

2,650

1,370

618

392

362

1,137

938

1,796

1,298

839

1,027

2,661

3,027

2,053

926

485

394

1.76 

1.45 

2.78 

2.01 

1.30 

1.59 

4.11 

4.68 

3.17 

1.43 

' .750 

.609

2.03

1.62

3.20

2.32

1.35

1.83

4.59

5.40

3.54

1.65

.86

22,400

18,300

24,000

13,000

9,330

11,100

103,000

136,000

132,000

62,700

25,300

19,000

576,000

30,400

29,500

23,700

21,800

21,200

'33,500

56,500

180,000

132,000

43,300

24,500

25,100

622,000

24,700

24,600

22,100

21,400

18,100

36,100

115,000

213,000

219,000

111,000

43,000

30,700

879,000

33,900

47,100

40,200

30,900

21,400

26,900

71,400

137,000

342,000

132,000

47,000

34,000

964,000

69,930

55,840

110,400

79,800

46,600

63,160

158,300

186,100

122,200

56,970

29,800

25.450

4,550 362 1,385 2.14 29.07 1,005,000
PEND OREILLE RIVER BASIN 147

Monthly discharge of Swan River near Big Fork, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum

Per 

square 

mile

Run-off

Inches Acre-feet

1934-35

October............

November...........

December...........

January............

February..;........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1935-36 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1936-27 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1937-38 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

726

851

586

563

540

594

2,050

4,550

4,250

2,200

788

455

374

602

449

392

429

423

489

1,770

2,050

797

455

356

457

728

504

474

477

520

1,110

2,655

3,183

1,358

591

391

0.706

1.13

.779

.733

.737

.804

1.72

4.10

4.92

2.10

.913

.604

0.81

1.26

.90

.85

.77

.93

1.92

4.73

5.49

2.42

1.05

.67

4,550 356 1,038 1.60 21.80

386

392

350

386

321

429

4,750

5,970

5,550

1,420

533

398

327

310

302

288

279

327

306

2,970

1,420

533

339

321

348

355

324

349

298

391

2,109

3,973

2,708

847

418

356

.538

.549

.501

.539

.461

.604

3.26

6.14

4.19

1.31

.646

.550

.62

.61

.58

.62

.50

.70

3.64

7.08

4.68

1.51-

.74

.61

5,970 279 1,040 1.61

339

306

368

327

267

306

1,200

3,300

3,130

1,780

570

315

284

270

258

267

255

252

321

1,200

1,840

540

321

264

312

290

307

289

262

277

675

2,217

2,443

982

440

290

.482

.448

.474

.447

.405

.428

1.04

3.43

3.78

1.52

.680

.448

.56

.50

.55

.52

.42

.49

1.16

3.95

4.22

1.75

.78

.50

3,300 252 734 1.13 15.40

344

464

498

427

376

498

2,640

4,350

4,050

1,830

583

398

284

354

344

317

308

317

471

1,360

1,970

605

398

326

308

394

428

379

334

395

1,232

2,277

2,777

1,078

472

367

.476

.609

.662

.586

.516

.611

1.90

3.52

4.29

1.67

.730

.567

.55

.68

.76

.68

.54

.70

2.12

4.06

4.79

1.92

.84

.63

28,090

43,300

30,990

29,130

26,500

31,990

66,050

163,300

189,400

83,510

36,350

23,240

751,800

21,420

21,140

19,950

21,480

17,160

24,030

125,500

244,300

161,200

52,060

25,700

21,190

755,100

19,160

17,270

18,880

17,770

14,530

17,050

40,160

136,300

145,300

60,400

27,030

17,250

531,100

18,950

23,420

26,340

23,320

18,570

24,280

73,290

140,000

165,200

66,280

29,000

21,830

4,350 284 871 1.35 18.27 630,500
148 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Yearly discharge of Swan River near Big Pork, Mont.

Year ending Sept. 30

Discharge in 

second-feet

Per 

square

Run-off

Inches

Calendar year

Discharge in 

second-feet

Mean square 

mile

Inches Acre-feet

1923.

1924.

1929.

1930.

1931.

973

946

1,050

796

858

1.50

1.46

1.62

1.23

1.33

20.39

19.89

22.12

16.73

18.01

705,000

686,000

762,000

576,000

622,000

976

939

990

822

842

1.51

1.45

1.53

1.27

1.30

20.45

19.76

20.83

17.25

17.65

707,000

682,000

717,000

595,000

609,000

1932.

1933.

1934.

1935.

1936.

1,210

1,330

1,385

1,038

1,040

1.87

2.06

2.14

1.60

1.61

25.46

27.93

29.07

21.80

21.89

879,000

964,000

1,003,000

751,800

755,100

1,280

1,490

1,200

983

1,050

1.98

2.30

1.85

1.52

1.59

26.90

31.28

25.19

20.64

21.69

928,000

1,080,000

868,700

712,000

747.900

1937.

1938.

734

871

1.13

1.35

15.40

18.27

531,100

630,500

1.16 15.78

Highest - 

Average. 

Lowest..

1,385

1,020

734

2.14

1.58

1.13

29.07

21.41

15.40

1,003,000

738,800

531.100

1,49CT

1,028

752

2.30

1.59

1.16

31.28

21.58

15.78

1,080,000

744,600

544.500

Big Creek near Poison, Mont.

Location.- Water-stage recorder, lat. 47°42", long. 114°02', In HW^ sec. 4, T. 22 N., R.

19 W., just downstream from Mission Range Power Co.'s plant three-quarters of a mile

upstream from mouth and 7 miles east of Poison. 

Records available.- June 1917 to September 1932. 

Extremes.- Maximum discharge, 104 second-feet June 9, 1917; no flow at short intervals

during November and December 1922, when power plant was shut down. 

Remarks.- Plow regulated by power plant.

Monthly discharge of Big Creek near Poison, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1917

June........................

July........................

August......................

September...................

The period...............

1917-18 

October.....................

November....................

December....................

January.....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

The year.................

1918-19 

October.....................

November....................

December....................

January.....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

The year.................

90

25

15

11.5

11.5 

6.7

28

27 

6.2

12.0

23.2

30

38

18.0 

8*1 

7.1

8.1 

8.1 

5.8

6.7

8.6

14.4

53.0

30.0

7.1

8.6

5.8

53.0

22.5

7.6 

7.1 

3.7

33.2

14.3

9.15

7.25

3.2

2.5 

4.5 

1.8 

5.0 

3.7 

8.1 

5.8 

5.8 

5.4 

5.0 

4.5

8.44 

4.42 

8.21

a7.23

a5.55 

6.34

14.4 

a!3.1

19.5 

8.23 

6.08 

5.66

1.8

5.8 

5.4 

2.8

3.7 

2.2

5.4 

2.8 

4.5 

2.0 

1.7 

1.4

6.92

6.40

4.15

e4.50

a5.51

4.54

8.15

18.1

17.0

4.05

4.56

4.06

1.4 7.32

1,980

. 879

563

431

3,850

519

263

505

445

308

390

857

806

1,160

506

374

337

6,470

426

381

255

277

306

279

485

1,110

1,010

249

280

242

5,300

a Partly estimated, 

e Estimated.
PEND OREILLE RIVER BASIN 149

Monthly discharge of Big Creek near Polacn, Mont. Continued

Month

1919-20

April. . ........................................

July. ..........................................

1920-21

April. .........................................

July. ..........................................

September ......................................

The

1921-22

1922-23

Th,e year ....................................

1923-24

April. . ........................... v ...........

May............................................

July. ..........................................

Discharge in second-feet

Maximum

5.5 

6.3 

5.8 

6.9 

4.3 

3.9 

4.5 

29.4 

17.8 

5.3 

5.6 

3.5

29.4

6.2

13.4 

18.5 

6.6 

5.5 

4.9

18.5

4.6 

6.8

5.4 

5.3 

5.3 

6.6 

38 

40 

8.4 

6.7 

4.6

40

5.2 

7.5 

7.8 

7.3 

6.8 

5.9 

6.8 

12.3 

18.4 

9.7 

9.0 

7.1

18.4

5.6 

5.4 

5.2 

4.2 

5.5 

5.3 

4.6 

22.6 

10.4 

5.6 

5.4 

7.0

22.6

Minimum

3.5 

2.8 

3.7 

2.6 

1.9 

1.7 

2.6 

3.4 

3.1 

2.8 

2.3 

S.4

1.7

1.8

1.6 

1.9 

3.5 

2.0 

2.4 

3.2

1.6

3.0 

2.7

3.8 

3.3 

3.1 

3.3 

4.8 

3.9 

3.6 

3.2 

2.8

2.7

3.0 

4.2 

5.0 

5.0 

4.9 

4.9 

4.9 

5.7 

5.8 

5.9 

5.4 

5.1

3.0

2.4 

2.4 

3.1 

3.0 

2.9 

2.6 

2.7 

6.0 

5.0 

4.6 

4.0 

4.4

2.4

Mean

4.74 

4.90 

4.69 

4.01 

3.58 

3.21 

3.55 

6.77 

6.12 

4.30 

3.51 

3.11

4.38

3.81 

5.44 

5.69 

5.16 

4.60 

4,73 

2.93 

5.70 

9.20 

4.77 

4.64 

4.33

5.08

4.14 

5»32 

5.10 

4.59 

4.68 

4.09 

4.55 

14.2 

15.3 

5.06 

5.36 

4.11

6.38

4.47 

5.82 

6.55 

6.44 

5.80 

5.22 

5.78 

7.57 

9.76 

8.08 

6.52 

6.23

6.52

3.83 

4.24 

4.09 

3.39 

4.41 

3.99 

3.58 

13.7 

7.63 

5.12 

4.51 

5.41

5.33

Run- off 

in 

acre-feet

291 

292 

288 

247 

206 

197 

211 

416 

364 

264 

216 

185

3,180

234 

324 

350

317 

255 

291 

174 

350 

547 

293 

285 

258

3,680

255 

317 

314 

282 

260 

251 

271 

873 

910 

311 

330 

245

4,620

275 

346 

403 

396 

322 

321 

344 

465 

581 

497 

401 

371

4,720

236 

252 

251 

208 

254 

245 

213 

842 

454 

315 

277 

322

3,870
150 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Big Creek near Poison, Mont. Continued

Month

1924-25

1925-26

1926-27

1927-28

1928-29

July. ..........................................

Discharge in second-feet

Maximum

4.2 

5.1 

5.1 

4.5 

4.6 

6.0 

21.0 

51.8 

19.4

51.8

5.1 

5.5 

5.8 

4.8 

4.8 

4.8 

27.0 

28.6 

5.2 

5.3 

6.0 

6.1

28.6

6.0 

6.3 

5.5 

5.2 

5.0 

4.9 

43 

35 

55 

20 

8.3 

7.3

55

5.7 

5.8 

6.0 

5.6 

5.2 

4.5 

19.3 

37.4 

30.1 

27.0 

7.9 

6.8

37.4

5.4 

6.1 

6.5 

4.8 

4.4 

4.1 

20.0 

86.8 

25.7 

15.6 

5.0 

5.0

26.8

Minimum

2.2 

2.2 

2.7 

2.8 

2.7 

2.5 

4.6 

10.0 

4.2

_

3.1 

3.2 

3.4 

3.0 

3.0 

2.9 

3.0 

3.0 

3.2 

2.7 

3.7 

3.1

2.7

3.7 

3.4 

2.7 

3.1 

3.0 

2.4 

3.3 

2.3 

17 

5.5 

4.6 

4.3

2.3

3.4 

3.5 

3.2 

3.3 

3.4 

2.9 

3.0 

22.4 

22.4 

5.4 

4.1 

3.0

2.9

3.4 

3.0 

4.0 

3.6 

3.0 

s'.o 2.9

15.6 

16.1 

3.2 

3.6 

3.8

2.9

Mean

2.99 

3.91 

4.21 

3.68 

3.46 

3.42 

11.4 

22.2 

13.3 

3.31 

4.25 

4.74

6.74

4.23 

4.59 

5.03 

4.02 

4.04 

3.95 

9.52 

9.94 

4.11 

4.52 

5.21 

5.03

5.36

4.95 

5.11 

4.34 

4.00 

4.26 

4.18 

10.9 

15.1 

32.4 

10.9 

6.31 

5.81

9.01

4.32 

4.96 

4.64 

4.53 

4.22 

3.35 

9.91 

32.0 

25.5 

18.1 

6.17 

4.69

10.2

4.50 

4.64 

5.30 

4.30 

3.84 

3.57 

4.54 

19.60 

19.90 

6.40 

4.37 

4.47

7.13

Run-off 

in 

acre-feet

184 

233 

259 

226 

192 

210 

678 

1,360 

791 

204 

261 

282

4,880

260 

273 

309 

247 

224 

243 

566 

611 

245 

278 

320 

299

3,880

304 

304 

267 

246 

237 

257 

649 

928 

1,930 

670 

388 

346

6,530

266 

295 

285 

279 

243 

206 

590 

1,970 

1,520 

1,110 

379 

279

7,420

277 

276 

326 

264 

213 

220 

270 

1,210 

1,180 

394 

269 

266

5,160
PEND OREILLE RIVER BASIN 151

Monthly discharge of Big Creek near Poison, Mont. Continued

Month

1929-30

April ...........................................

1930-31

April ..........................................

July. ..........................................

1931-32

April. . ........................................

July. ..........................................

Discharge in second-feet

Maximum

5.1 

5.3 

5.1 

4.9 

4.9 

4.6 

12.7 

7.3 

6.5 

6.1 

6.5 

6.7

12.7

7.1 

7.9 

8.3 

6.2 

* 6.2 

5.9 

5.8 

6.2 

6.5 

6.7 

6.9 

7.1

8.3

8.3 

8.6 

7.1 

6.3 

6.4 

9.0 

7.2 

8.0 

7.3 

8.0 

7.9 

7.9

9.0

Minimum

3.7 

3.6 

3.9 

4.0 

3.3 

3.3 

3.5 

3.8 

3.9 

4.3 

5.0 

4.7

3.3

5.7 

5.9 

4.7 

2»9 3)2

2.7 

4.3 

4.3 

5.0 

4j8 

5.'0 

3.2

2.7

4.9 

3.4 

4.7 

3.3 

1.9 

2.7 

4.6 

1.7 

4.5 

3.0 

4.5 

6.7

1.7

Mean

a4.55 

4.54 

4.53 

4.53 

4.37 

3.90 

7.07 

5.15 

4.56 

5.35 

5.79 

6.04

5.03

6.42 

6.83 

 6.18 

4.47 

5.22 

4.34 

5.36 

5.41 

5.64 

5.82 

6.12 

5.85

5.64

6.73 

6.34 

6.02 

5.61 

4.71 

5.44 

6.42 

6.02 

6.92 

7.18 

7.51 

7.56

6.^37

Run- off 

in 

acre-feet

280 

270 

279 

279 

243 

240 

421 

317 

271 

329 

356 

359

3,640

395 

406 

380 

275 

290 

267 

319 

333 

336 

358 

376 

348

4,080

414 

377 

370 

345 

271 

334 

382 

370 

412 

441 

462 

450

4,630

Yearly discharge of Big Creek near Poison, Mont.

Year

1918 ...........

1919 ...........

1921 ...........

1922 ...........

1 OO**

1924

1927 

T Q£>ft

1.929 

1932 ...........

Year ending Sept. 30

Mean discharge 

in second-feet

8.94 

7.32 

4.38 

5.08 

6.38

6.52 

5.33 

6.74 

5.36 

9.01

10.2 

7.13 

5.03 

5.64 

6.37

10.2 

6.63 

4.38

Run-off in 

acre-feet

6,470 

5,300 

3,180 

3,680 

4,620

4,720 

3,870 

4,880 

3,880 

6,530

7,420 

5,160 

3,640 

4,080 

4,630

7,420 

4,800 

3,180

Calendar year

Mean discharge 

in second-feet

8.63 

7.06 

4.43 

5.05 

6.57

6.13 

5.24 

6.97 

5.40 

8.97

10.3 

7.07 

5.52 

5.61

10.3 

6.64 

4.43

Run-off in 

acre-feet

6,240 

5,110 

3,210 

3,660 

4,760

4,440 

3,81'0 

5,050 

3,910 

6,500

7,460 

5,120 

4,000 

4,060

7,460 

4,810 

3,210
152 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Little Bitterroot River near Marion, Mont.

Location.- Staff gage, lat. 48°05', long. 114°41 T , in T. 27 H., R. 24 W., at log bridge

downstream from outlet of Little Bitterroot Lake, near Marion. 

Records available.- January 1910 to September 1916.

Extremes.- Maximum discharge observed, 53 second-feet Apr. 27, 1916 (gage height, 3.05 

 feet); no flow Jan. 19-23, 1915 (gage height., 0.30 foot). 

Remarks.-, Jlo diversion. Some water stored in the lake above station gage during spring

and summer of 1916.

Monthly discharge of Little Bitterroot River near Marion, Mont.

Month

April. .........................................

May. ...........................................

July. ..........................................

April 24-30, 1911 ..............................

October 1911 ...................................

April 1912. ....................................

May. ...........................................

April 13-30, 1913. .............................

May. ...........................................

July. ..........................................

May. ...........................................

September. .....................................

Water year 1914-15. .........................

Discharge in second-feet

Maximum

36 

43 

35 

31

11 

17

10.2 

5.0 

4.0 

8.7 

18.0 

19 

18 

5.0 

3.3

2.6 

2.6 

3.3 

8.3 

14 

11 

9.7 

6.2 

3.0

2.0 

1.3 

14.4 

25.2 

25.2 

21.5 

1.5 

2.6

2.6 

1.5 

1.5 

10.3 

11.9 

10.3 

8.0 

.8 

1.2

3.8 

1.2 

1.6 

1.4 

.6 

1.2

.8 

3.0 

2.8 

2.5 

5.8 

5.8

5.8

Minimum

3.5 

16 

11 

1.2 

1.1

2.6 

2.0 

1.6 

8.7 

8.7 

14 

3.7 

2.4 

2.4

2.6 

2.6 

2.4 

2.7 

8.1 

4.6 

4.2 

1.0 

2.1

1.2 

1.1 

3.0 

14.4 

21.5 

.8 

.6 

1.2

1.5 

1.5 

.8 

5.0 

7.3 

5.2 

.6 

.6 

.8

.8 

.8 

1.2 

0 

.1 

.5 

.1 

.1 

.1 

.8 

.1 

3.0

0

Mean

04.00 

04.00 

e28.0 

a28.4 

22.0 

26.0 

20.0 

3.7

8

V

6.4 

3.3 

2.8 

8.70 

15.2 

16.1 

10.6 

3.43 

2.60

2.60 

2.60 

3.14 

5.10 

10.8 

6.95 

7.21 

2.15 

2.39

1.56 

1.13 

8.41 

19.7 

23.3 

2.82 

1.14 

1.76

1.90 

1.50 

1.18 

6.94 

10.5 

7.43 

4.54 

.62 

.85

2.81 

.87 

1.32 

.29 

.37 

.74 

.51 

1.06 

1.23 

1.35 

1.14 

3.83

1.30

Run- off

acre-feet

246 

222 

1,720 

1,690 

1,350 

1,550 

1,230 

228 

494

8,730

394 

196 

172 

121 

935 

958 

652 

211 

155

160 

155 

193 

303 

664 

414 

443 

132 

142

95.9 

29.1 

300 

1,210 

1,390 

173 

70 

^ 105

117 

89 

73 

413 

646 

" 442

279 

38 

51

173 

52 

81 

18 

21 

46 

30 

65 

73 

83 

70 

228

940

a Partly estimated. 

Estimated.
PEND OREILLE RIVER BASIN 153

Monthly discharge of Little Bitterroot River near Marion, Mont.-Continued

Month

Discharge in second-feet

Maximum Minimum Hean

Run-off

in 

acre-feet

October 1915. 

November..... 

December.....

3.6 

1.2 

1.2

Calendar year 1915.

January 1916..........

February..............

March.................

April.................

May...................

June..................

July..................

August................

September.............

Water year 1915-16.

. 4.3

18.5

14.2

53

50

40

42

1.5

1.8

53

2.15 

.66 

.63

1.16

.5 

5.0 

9'. 4 

13.3 

34 

36 

1.5 

.2 

.2

1.52

12.7

11.5

34.4

38.7

38.5

27.2

.94

.75

.2 14.1

132

39

38

843

94

730

707

2,050

2,380

2,290

1,670

58

45

10,200

Little Bitterroot River near Hubbart, Mont.

Location.- Staff gage, lat. 47°53", long. 114°40«, upstream from canyon leading to 

aecond fall of Little Bitterroot River, 1-i miles west of ranch buildings of 

Hubbart Cattle Co., near Hubbart post office, 15 miles south of Marion.

Records available.- October 1909 to September 1916. April to October 1909 at site 

about 1 mile downstream.

Extremes.- Maximum discharge observed, 340 second-feet May 6, 1916 (gage height,

4.0 feet); minimum observed, 1.4 second-feet, Oct. 20-27 and Nov. 10, 1914 (gage 

. height, 0.9 foot).

Remarks.- Ho diversion. Natural storage In Little Bitterroot Lake 15 miles above

Monthly discharge of Little Bitterroot River near Hubbart, Mont.

Discharge in second-feet

Maximum Minimum Mean

Run-off

In 

acre-feet

1909 

April 22-30..................

May 1-22.....................

August.......................

September....................

1909-10 

October......................

November.....................

January......................

February.....................

March........................

April........................

May..........................

June.........................

July..........................

August.......................

September....................

1910-11 

October ......................

November.....................

December.....................

April........................

May..........................

June.........................

July.........................

August.......................

September....................

1911-12 

October.................- 

April........................

May..........................

June.........................

July........--...............

August.......................

September....................

1912-13 

October......................

November 1-11................

July 23-31...................

August.............. 

September ....................

e Estimated.

66

122

40

13

206

176

119

70

44

17

19

19

19

72

80

80

51

34

22

76

52

32

18

10

10

16

16

25

54

32

14

12

8

6.

70

53

16

15

10

10

8

12

10

8

57

89

22

13

13

24 

e!8 

e!8 

133 

133

80

47

29

12

13

16

17 

e!6 

42.8 

65.1 

50.0 

28.3 

17.4 

10.5

6.72

72.4

70.6

30.4

16.3

12.5

11.0

10.4

11.9

12.3

11.2

9.4

1,020

3,880

1,350

774

799

1,430

1,110

1,000

8,180

7,910

4,920

2,800

1,780

740

774

984

1,010

984

2,550

4,000

2,980

1,740

1,070

625

413

4,310

4,340

1,810

1,000

769

655

640

260

220

689

559
154 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Little Bltterroot River near Hubbart, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

October.......

November 1-14. 

April.........

May...........

June..........

July..........

August........

September.....

1913-14

October... 

November.. 

April.....

May.......

June......

July......

August....

September.

October.......

November 1-13. 

April.........

May...........

June..........

July..........

August........

September.....

12

10

61

26

18

2.4

7.7

64

45

37

16

14

12

12

8.0

260

340

144

92

19

14

6

6

23

28

18

8

2

2

1.4

1.4

22

25

13

10

6.8

7.1

8

6.5

134

111

96

20

14

12

10.5

7.6

47.0

46.6

22.9

12.6

4.4

2.6

1.90

3.13

37.0

33.4

20.5

13.2

9.38

10.2

8.61 

6.82 

187 

177 

118 

58'. 4 

16.7 

13.1

646

211

2,800

2,870

1,360

775

271

155

117

186

2,200

2,050

1,220

812

577

607

529

176

11,100

10,900

7,020

3,590

1,030

780

Little Bltterroot River near Niarada, Mont.

Location.- Staff gage, lat. 47°48', long. 114°39', in T. 24 N., R. 24 W., at Angus

McDonald's ranch, 2 miles southwest of Niarada. 

Records available.- April 1916 to September 1917. April 1908 to December 1909 published

as Little Bitterroot River near Dayton. 

Extremes.- Maximum discharge observed, 412 second-feet May 7, 1916 (gage height, 5.30

feet); minimum observed, 3.0 aecond-feet Aug. 28, 1917 (gage height, 0.60 foot). 

Remarks.- Several small diversions for irrigation above station. Natural storage in

Little Bitterroot Lake.

Monthly discharge of Little Bitterroot River near Niarada, Mont.

Month Discharge in second-feet Run-off in 

Maximum Minimum Mean acre-feet

April 18-30.........*???...

May........................

June.......................

July.......................

August.....................

September..................

The period..............

1908-9 

October....................

March 19-31................

April......................

Vay........................

June.......................

July.......................

August.....................

September..................

October....................

November...................

April 12-30.........I?!?...

May........................

June.......................

July.......................

August.....................

September..................

The period..............

« 4. v 1916-17 October....................

November...................

April......................

May........................

June.......................

July.......................

August.....................

Septembe r..................

262

158

344

80

44

31

36

47

102

258

190

72

42

24

21

110

384

412

224

130

28

18

22

18

116

325

129

30

17

6

101

97

82

46

21

13

177

134

124

61.3

29.5

19.3

23.3

39.6

65.8

143

129

44.1

26.3

21.0

20.4

37.2

193

161

133

30

18

15

262

239

174

82.8

23.1

16.5

17.2

15.6

62.6

163

78.9

19.6

9.10

5.30

4,550 

8,240 

7,380 

3,770 

1,81X> 

1,150

26,900

1,430

1,020

3,920

8,790

7,680

2,710

1,620

1,250

1,250

2.210

9,870

14,700

10,400

5,090

1,420

982

42,500

1,060

925

3,720

10,000

4,690

1,200

558

315
PEND OREILLE RIVER BASIN 155

Crow Creek near Ronan, Mont.

Location.- Staff gage, lat. 47°29', long. 114 D05' in SVl£ sec. 13, T- 20 N., R. 20 W., 

500 feet upstream from old highway bridge, about a quarter of a mile upstream from 

present bridge on state road from St. Ignatius to Ronan, and 3 miles south of 

Ronan.

Records available.- September 1906 to September 1917.

Extremes.- Maximum discharge observed, 1,400 second-feet June 6, 1908 (gage height, 

10.85 feet); minimum observed, 3.2 second-feet Sept. 19-21, 1917 (gage height, 

0.32 foot).

Remarks.- Water diverted above station by Pablo feeder canal to irrigate about

12,400 acres. No regulation. 

__ ____Monthly discharge of Crow Creek near Ronan. Mont._____

Month

Discharge In second-feet

Maximum

Run-off

in 

acre-feet

1906 

September 21-30..............

1906-7 

Oct ober......................

November.....................

December.....................

January......................

February.....................

March........................

April........................

May..........................

June.........................

July.........................

August.......................

Sept ember....................

The year..................

1907-8 

Oct ober......................

November.....................

December.....................

March........................

April........................

May..........................

June.........................

July......... .................

August.......................

September....................

1908-9 

October......................

November.....................

May..........................

June.........................

July.........................

August.......................

Sept ember....................

1909-10 

October......................

November.....................

January......................

February.....................

March........................

April.. ......................

May..........................

June.........................

July.........................

August.......................

September....................

1910-11 

October......................

November.....................

December.................... .

January......................

February.....................

March........................

April........................

May.......... ................

June.........................

July.........................

August.......................

Sept ember....................

The year..................

22 23.9 474

42

156

59

119

61

386

427

392

89

59

427

54

24

21

27

150

314

1,400

250

52

271

59

39

264

426

232

38

34

32

158

112

228

300

170

56

25

25

22

91

222

475

294

73

46

25

30

33

244

93

44

33

29.9 

51.5 

34.2

e25.0

e20.0 

39.8 

43.7

148

306

196 

62.8 

41.1

24

20

18

18

18

54

151

55

32

22

23

20

28

162

38

24

22

18

18

28 

35 

106 

76 

23 

22; 

14

83.4

27.5 

21.2 

20.0 

21.5 

57.0

179 

a536

109 

37.5 

42.0

34.0

24.2

76.7

274

133

30.9

25.8

21.6 

53.4

e25

e25 

46.8

105

197

127 

33.4 

22.9 

20.0

15

17

63

130

68

31

23

23.9 

31.8 

23.7

elO.O

elO.O 

16.2 

33.9

105

339

146 

43.5 

33 5

1,840

3,060

2,100

1,540

1,110

2,450

2,600

9,100

18,200

12,100

3,860

2,450

60,400

1,690

1,260

1,230

1,320

3,390

11,000

31,900

6,700

2,310

2,500

2,090

1,440

4,720

16,300

8,180

1,900

1,540

1,330

3,180

1,540

1,390

2,880

6,250

12,100

7,560

2,050

1,410

1,190

1,470

1,890

1,460

615

555

996

2,020

6,460

20,200

8,980

2,670

1,990

475 3.1 49,300

a Discharge interpolated June 6-28. 

e Estimated.
156 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Crow Creek near Ronan, Mont. Continued

Month

1911-12

April. ..........................................

July. ...........................................

1912-13

April ...........................................

July. ...........................................

1913-14

May .............................................

July. ...........................................

1914-15

April. ..........................................

1915-16

May. ............................................

1916-17

Discharge in second-feet

Maximum

46 

36

26 

57

262 

91 

46

23

94 

462 

474 

213 

62 

57

125 

44 

26 

25

22 

69 

260 

367 

72 

39 

18.2

367

159 

55 

33 

85 

243 

248 

378 

378 

54 

164

64 

46 

41 

170 

114 

294 

664 

560 

58 

188

46 

12 

9.5 

36 

87 

375 

700 

420 

28 

7.3

Minimum

24 

15

17 

23

56 

17 

12

12

2.0 

47 

264 

14 

7.0 

7.0

20 

28 

20 

17

14.5 

17 

57 

59 

24 

5 

3.3

3.3

14 

35 

25 

47 

57 

97 

151 

62 

28 

30

46 

41 

32 

56 

46 

76 

138 

18 

5.5 

36

9.5 

6.5 

7.5 

36 

41 

100 

375 

28 

5.7 

3.2

Mean

35.0 

22.2 

e!5.0

22.4 

30.6 

130 

227 

117 

49.5 

27.1

15.4 

12.0 

7.0 

36.7 

115 

369 

87.2 

39.3 

36.0

39.6 

31.9 

23.1 

19.9 

17.0 

19.3 

35.9 

152 

164 

46.9 

14.9 

5.74

47.6

45.6 

47.4 

27.0 

60.6 

110 

187 

194 

188 

35.1 

47.6

52.8 

42.1 

33.9 

74.2 

57.7 

150 

435 

299 

21-0 

78.2

25.6 

8.07 

8.61 

36.0 

53 

279 

526 

126 

12.5 

4.29

Run-off 

in 

acre-feet

2,150 

1,320 

922

755 

1,820 

7,990 

13,500 

7,190 

3,040 

1,610

947 

714 

430 

2, ISO 

7,070 

22,000 

5,360 

2,420 

2,140

2,430 

1,900 

1,420 

1,220 

944 

1,190 

2,140 

9,350 

9,760 

2,880 

916 

342

34,500

2,800 

2,820 

643 

3,730 

6,550 

11,500 

11,500 

11,600 

2,160 

2,830

3,250 

2,510 

2,080 

3,970 

3,430 

9,220 

25,900 

18,400 

1,290 

4,650

1,570 

480 

188 

500 

3,150 

17,200 

31,300 

7,750 

769 

255
PEND OREILLE RIVER BASIN 157

Crow Creek at Lozeau's ranch, near Ronan, Mont.

Location.- Chain gage, lat. 47°30', long. 114°15', in EJJ sec. 15, T. 20 N., R. 21 E., 

at Louis Lozeau's ranch, about a mile downstream from Mud Creek, 2-^ miles upstream 

from mouth, and 8 miles southwest of Ronan.

Records available.- April 1911 to September 1916.

Extremes.- Maximum discharge observed, 960 second-feet June 29, 1911 (gage height, 

3.4 feet); minimum observed, 4 second-feet Mar. 21, 1913 (gage height, 0.8 foot).

Remarks.- Several diversions above station for irrigation. No regulation.

Monthly discharge of Crow Green: at Lozeau's ranch, near Ronan, Mont.

Discharge in second-feet

aximum Minimum Mean

Run-off in 

acre-feet

1911

May..........................

June.........................

July.........................

August.......................

September....................

1911-12 

October.......................

November.....................

December.....................

January......................

February.....................

March........................

April........................

May..........................

June.........................

July..........................

August.......................

September....................

The year..................

1912-13 

October......................

November.....................

December.....................

March 2-31...................

April........................

May..........................

June.........................

July.........................

August.......................

September....................

 .. 1913-14 October......................

November.....................

December.....................

January......................

February.....................

March........................

April........................

May..........................

June............. i...........

July.........................

August.......................

September....................

The year..................

1914-15 

October......................

November.....................

December 1-15................

March 22-31..................

April.. ......................

May..........................

June.........................

July.........................

August.......................

September....................

1915-16 

October......................

November.....................

Dec ember.....................

January 1-6..................

March........................

April........................

May....... ...................

June 1-16....................

July 8-31....................

August.......................

September....................

386

960

515

61

78

78

61

61

64

122

75

78

282

527

320

187

97

527

77

61

54

534

111

628

616

170

78

65

115

78

55

53

80

164

99

179

355

127

80

99

355

179

80

110

410

301

357

397

123

70

116

116

65

50

520

120

282

640

717

109

296

100

124

61

33

46

156

413

181

48.6

55.7

46

23

28

33

33

14

36

46

200

97

36

47

63.1 

48.6 

41.8 

44.4 

52.2 

41.2 

52.8

136

 284

173 

88.7 

68.6

14 91.1

33

50

4

50

50

155

78

37

37

55.2

50.7

42.1

70.8

66.8

155

299

101

55.8

56.5

55

55

55

43

43

43

65

110

49

35

35

62.7

64.3

55

49.1

44.6

65.9

69.5

120

207

85.2

45.1

42.1

72

43

65

53

150

139

139

42

50

70

57

50

48

40

63

74

120

92

66

86

105

101

55.5

79.5

153

209

206

187

72.1

62.1

92.5 

67-5 

57.6 

49.3

149 

85.6

130

281

385 

79.7

131

9,590

24, 600

11,100

2,990

3,310

3,880

2,890

2,570

2,730

3,000

2,530

3,140

8,360

16,900

10,600

5,450

4,080

66,100

3,390

3,020

2,590

4,210

3,980

9,530

17,800

6,210

3,430

5,560

5,860

5,850

5,380

3,020

2,480

4,050

4,140

7,580

12,500

5,240

2,770

3,100

55,600

6,460

6,010

1,650

1,580

9,100

12,900

12,500

11,500

4,430

5,700

5,690

4,020

5,540

587

9,160

5,090

7,990

8,920

18,300

4,900

7,800

527283 O - 43 - 11
158 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Mud Creek near Ronan, Mont.

Location.- Staff gage, lat. 47°33', long. 114°08', In T. 21 H., R. 20 W. at Jeffrey's

ranch, 3 miles northwest of Ronan. 

Records available.- April 1908 to December 1910. 

Extremes.- Maximum daily discharge, 39 second-feet June 23, 27-30, 1909 (gage height,

4.B feet); minimum daily, 1.6 second-feet April 7, 8, 1909 (gage height, 2.25 feet). 

Remarks.- Pablo ditch diverts water for irrigation 200 feet below station. No regulaMonthly discharge of Mud Creek near Ronan, Mont.

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1908 

April 17-30-................

August......................

September...................

1908-9 

October. ....................

November....... ............

December....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

Sept ember...................

1909-10 

October.....................

November....................

December....................

January.....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

Water year 1909-10 

1910 

October.....................

November ...................

December,....................

Calendar year 1910.......

7

14

9

8.5

8

7.5

8.3

5.2

6.9

39

33

20

16

6.9 

6.3 

5.2

20

14

20

14

7.2

4.6

4.1

5

8

2.8

8

7

6

1.7

1.6

2.5

1.8

17

8.3

6.3

2.9 

5.2 

3.9

6.8

6.8

8.8

11

3.5

4.0

3.5

6.29

9.77

5.30

8.10

7.60

6.89

4.10

2.85

4.96

16.5

24.7

14.2

9.56

6.27 

5.60 

4.37 

e4.0 

e5.0 

10.7

7.56 

12.7 

12.4 

5.12 

4.17 

3.65

175

601

315

498

452

260

252

170

305

982

1,520

873

569

386

333

269

246

278

658

450

781

738

315

256

217

20 6.81 4,930

3.5 

4.1 

3.8

3.4 

3.4 

3.4

3.46

3.82

3.48

213

227

214

20 3.4 4,590

e Estimated

Mission Creek near St. Ignatlus, Mont.

Location.- Staff gage, lat. 47°20', long. 114°07' in SVfJ sec. 10, T. 18 N., R. 20 W.,

about 1 mile downstream from St. Ignatlus. 

Records available.- September 1906 to September 1917. 

Extremes.- Maximum discharge, 2,000 second-feet (estimated) June 10, 1908; minimum discharge observed, 8 second-feet at times during 1908 and Feb. 28, 1911 (gage height,

0.2 foot). 

Remarks.- Several diversions above station for irrigation. Flow regulated by St. Marys

Monthly discharge of Mission Creek near St. Ignatiua, Mont.

Month

Discharge in second-feet

Maximum

Run-off

in 

acre-feet

September SI-30. 1906 54.4 1,080
PEND OREILLE RIVER BASIN 159

Monthly discharge of Mission Creek nsar St. Ignatlus, Rout. Continued

Month

1906-7 October. ... .... ...

April. .........................................

July. ..........................................

1907-8

April. . ........................................

May............................................

July. ..........................................

1908-9

April. .........................................

May............................................

July. ..........................................

1909-10

April ..........................................

May. ...........................................

July. ..........................................

1910-11

April. .........................................

July. ..........................................

September ......................................

Discharge in second-feet

Maximum

57 

69 

40 

32 

21 

34 

54 

236 

442 

550 

160 

87

550

48 

30

14 

10 

10

n

86 

236 

2,000 

440 

92 

120

2,000

55 

44

§84 

22

16 

16 

207 

602 

311 

118 

73

602

63 

58 

30 

17 

52 

57 

112 

200 

210 

89 

36 

28

210

32 

36 

24

16 

13

29 

82 

380 

243 

100 

66

380

Minimum

45 

34 

33 

10 

13 

16 

27 

41 

154 

160 

75 

51

10

30 

14 

10 

8 

8 

8 

10 

53 

218 

92 

55 

44

8

44 

34 

25 

22 

16 

16 

13 

16 

151 

127 

58 

45

13

40 

30

21 

12 

12 

13 

17 

52 

69 

32 

19 

20

12

26 

25 

17 

10 

8

. 10 

29 70 

104 

58 

48

8

Mean

50.5 

48.1 

36.5 

a!6.9 

14.4 

20.2 

36.7 

103 

a236 

293 

107 

70-9

86.5

38.5 

21.1 

11.8 

a9.87 

9.03 

9.97 

29.7 

120 

a823 

230 

73.5 

58.6

119

47.7 

* 41.3 

29.5 

29.3 

19.0 

16-0 

15-0 

49.7 

275 

191 

31.6 

il.8

70.7

47.5 

41.3 

24.4 

14.5 

22.3 

21.6 

37.3 

98.0 

120 

48.8 

28.0 

22-1

43.9

27.9 

28.6 

19.1 

14.7 

11.0 

e!4.0 

16.3 

47.0 

234 

171 

77.6 

52.6

59.6

Run- off 

in 

acra-feet

3,110 

2,860 

2,240 

1,040 

800 

1,240 

2,180 

6,330 

14,000 

18,000 

6,580 

4,220

62,600

2,370 

1,260 

726 

607 

519 

613 

1,770 

7,380 

49,000 

14,100 

4,520 

3,490

86,400

2,930 

2,460 

1,810 

1,800 

1,060 

984 

893 

3,060 

16,400 

11,700 

5,020 

3,080

51,200

8,920 

2,460 

1,500 

892 

1,840 

1,330 

2,220 

6,030 

7,140 

3,000 

1,720 

1,320

31,800

1,720 

1,700 

1,170 

904 

611 

861 

970 

2,890 

13,900 

10,500 

4,770 

3,130

43,100

a Partly estimated. 

e Estimated.
160 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Mission Creek near St. Ignatius, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1911-12 

October.....................

November....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

1912-13 

October.....................

November....................

December....................

January.....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

The year.................

1913-14 

October.....................

November....................

December....................

January.....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

The year.................

1914-15 

October.....................

November....................

December-....................

March 16-31.................

April.......................

May.........................

June........................

July........................

August......................

September...................

1915-16 

October.....................

November....................

December....................

January.....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

The year.................

61

36

13

14

38

202

343

175

166

106

51

36

27

18

18

14

40

265

370

335

102

54

370

38

29

22

16

16

14

22

201

358

226

61

38

358

76

61

29

16

111

178

385

358

213

111

61

48

38

29

22

24

59

108

590

400

284

135

36

27

12

11

16

20

70

157

63

51

45

30.5

12.4

12.0

23.8

96.3

223

165

109

61.5

40

27

20

14

14

14

14

26

201

102

61

29

46.7

31.3

23.2

16.3

16.0

14.0

26.5

91.6

262

160

82.1

38.8

14

29

22

10

11

11

11

11

26

132

68

29

16

30.3

25.8

15.8

15.7

12.7

11.9

15.4

91.4

209

137

37.8

33.2

10 53.2

38

29

22

16

19

61

201

226

132

38

52.0

36.8

26.4

16.6

55.8

120

246

295

167

61.1

29

38

29

16

16

14

20

53

78

221

68

62

54.2

40.5

33.2

23.2

16.7

17.1

36.4

70.9

228

332

121

80.8

2,770

1,810

713

738

1,420

5,920

12,400

3,600

6,700

3,660

2,870

1,860

1,430

1,000

889

861

1,580

5,630

15,600

9,840

5,050

2,310

48,900

1,860

1,540

972

965

705

732

916

5,620

12,400

8,420

2,320

1,980

39,400

3,200

2,190

1,620

508

3,320

7,380

14,600

18,100

10,300

3,640

3,330

2,410

2,040

1,430

961

1,050

2,170

4,360

13,600

20,400

7,440

4,810

590 14 64,000
PEND OREILLE RIVER BASIN 161

Monthly discharge of Mission Creek near St. Ignatius, Mont. Continued

Mon^h

1916-17

April ..........................................

May. ...........................................

July. ..........................................

Discharge in second-feet

Maximum

50 

35 

27 

16 

16 

12 

31 

245 

426 

265 

100 

84

426

Minimum

35 

27 

16 

16 

12 

12 

11 

21 

98 

105 

65 

65

11

Mean

38.2 

29.2 

22.8 

16.0 

13.7 

12.0 

21.9 

85.2 

253 

206 

80.7 

77.1

71.6

Run-off 

in 

acre-feet

2,350 

1,740 

1,400 

984 

761 

738 

1,300 

5,240 

15,100 

12,700 

4,960 

4,590

51,900

Yearly discharge of Mission Creek near St. Ignatius, Mont.

Year

1909 ............

1910 ............

1911 ............

1913 ............

1914 ............

1916 ............

1917 ............

Year ending September 30

Mean discharge 

in second-feet

86.5 

119 

70.7 

43-. 9 

59.6

67.6 

53.2 

88.1 

71.6'

Run- off in 

acre-feet

62,600 

86,400 

51,200 

31, 800 

43,100

48,900 

39,400 

64,000 

51,900

Calendar year

Mean discharge 

in second-feet

81.1 

123 

70.3 

40.7

65.1 

56.7 

85.0

Run- off in 

acre-feet

58,700 

89,200 

50,900 

29,500

47,100 

41,100 

61,700

Dry Creek near St. Ignatius, Mont.

Location.- Staff gage, lat. 47°17', long. 114O00', in T. 18 N., R. 19 W., at Pelsman's 

ranch, lj miles downstream from St. Marys Lake, above the only tributary, and 5 miles 

southeast of St. Ignatius.

Records available.- April 1908 to September 1916.

Extremes.- Maximum discharge, 250 second-feet (estimated) June 6-7, 1908; no flow at 

times.

Remarks.- One small diversion above gage. Flow regulated by St. Marys Lake.

Monthly discharge of Dry Creek near St. Ignatius, Mont.

Month

1908

1908-9

Discharge In second-feet

Maximum

21 

48 

250 

92 

28 

17

-

7 

5 

44 

144 

95 

29 

4.2

Minimum

7 

10 

48 

28 

3 

1

-

3 

0 

0 

32 

29 

2.2 

1.0

Mean

12.2 

27.3 

119 

54.7 

11.5 

6.93

-

5.16 

3.13 

10.8 

75.0 

49.4 8.97' 

2.35

Run-off 

in 

acre-feet

363 

1,680 

7,080 

3,360 

707 

412

13,600

317 

186 

492 

4,460 

3,040 

552 

140
162 SURFACE WATERS OF UPPER COLUMBIA RIVER BA9IN, 1898-1938

Monthly discharge of Dry Creek near St. Ignatiua, Mont. Continued

Month

Dieeharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1909-10

October........................................ 7.0

November....................................... 7.0

December.......................................

January........................................ 0

February....................................... 0

March.......................................... 0

April.......................................... 22

May............................................ 48

June........................................... 48

July,.......................................... 25

August......................................... -

September...................................... __-

1910-11

October........................................ 0

November....................................... 0

December....................................... 0

January........................................ 0

February....................................... 0

March.......................................... 0

April.......................................... 0

May............................................ 11

June........................................... 150

July........................................... 78

August......................................... 20

September...................................... -

The year.................................... 150

1911-12 "'

October........................................ 0

November....................................... 0

December....................................... 0

January........................................ 0

February....................................... . 0

March.......................................... 0

April.......................................... 11

May............................................ 40

June........................................... 78

July........................................... 78

August......................................... 33

September...................................... 7

The year.................................... 78

1912-13

October........................................ 1

November....................................... 0

December....................................... 0

January........................................ 0

February....................................... 0

March.......................................... 0

April.......................................... 6

May............................................ 67

June........................................... 72

July........................................... 57

August......................................... 19

Septeaber...................................... 10

The year.................................... 72

1913-14

October........................................ 0

November....................................... 0

December....................................... 0

January........................................ 0

February....................................... 0

March.......................................... 0

April.......................................... 10

May............................................ 202

June............................................ 150

July........................................... 101

August......................................... 14

September...................................... 7

The year.................................... 202

3.54

0

0

0

3.7

28.7

27.2

10.1

0

0

0

0

0

0

0

0

0

a4.0 

77.2 

41.0

4.9

0

10.6

0

0

0

0

0

0

a4.3 

23.6 

56.9 

42.3 

16.2

4.4

12.3

.13

0

0

0

0

0

a3.72 

15.3 

53.2 

30.7 

13.8

3.7

10.1

0

0

0

0

0

0

2.39

33.7

66.0

39.6

9.48

4.93

218

58.9

0

0

0

220

1.760

1,620

621

0

0

0

0

0

0

0

246

4,590

2,520

301

0

7,660

 0 

0 

0 

0 

0 

0

256

1,450

3,390

2,600

996

262

8,950

8

0

0

0

0

0

221

941

3,170

1,890

848

220

7,290

0

0

0

0

0

0

142

2,070

3,930

2,430

583

295

13.1 9,450

a Partly estimated.
PEND OKEILLE RIVER BASIN 163

Monthly discharge of Dry Creek near St. Ignatlus, Mont. Continued

Month

Discharge in second-feat

Maximum Minimum Mean

Run-off

in 

acre-feet

October.......

November......

December 1-12. 

March 20-31... 

April.........

May...........

June..........

July..........

August........

September.....

1914-15

October.......

November 1-13. 

April.........

May...........

June..........

July..........

August........

September.....

19.15-16

38

10

6

6

44

49

113

86

54

20

17

6.0

24

33

220

111

9.3

21

3.0

6.0

2.0

.5

4.0

16

34

47

16

14

4.0 

5.0

4.0

17

20

6.5

6.8

6.5

15.6

7.87

4.17

3.66

20.3

36.9

62.8

66.1

25.8

16.1

10.£ 

5.77 

9.87 

23.8 

72.6 

61.5

7.84 

11.2

959

468

99.3

87.1

1,210

2,270

3,740

4,060

1,590

958

627

149

587

1,460

4,320

3,780

482

666

Post Creek at Fitzpatri3k's ranch, near Ronan, Mont.

Location.- Staff gage, lat. 47°28' , long. 114°01', in T. 20 N. , R. 19 W. , near the h

of J. G. Fitzpatrick, 8 miles southeast of Ronan, 10 miles north of St. Ignatius,

2 miles upstream from North Fork of Post Creek. 

Records available.- September 1906 to May 1911. 

Extremes.- Maximum discliarge, 2,800 second-feet June 10, 1908 (gage height, 8.48 feet,

estimated from high-water mark); minimum daily discharge, 20 second-feet Jan. 17-30,

1908 (ice present). 

Remarks . - Two small diversions above gage.

ouse 

and

Monthly discharge of Post Creek at Fltzuatrick's ranch, near Ronan, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

September 21-30, -1906.......................... ____59

October 1906................................... 64

November....................................... 88

December....................................... 54

January 1907...................................

February.......................................

March.......................................... 39

April.......................................... 56

May............................................ 290

June........................................... 412

July........................................... 410

August......................................... 196

September...................................... 99

Water year 1906-7............................ 412

October 1907................................... 38

November....................................... 31

December....................................... 28

Calendar year 1907........................... 412

January 1908................................... 25

February....................................... 30

March.......................................... 35

April.......................................... 103

May............................................ 178

June........................................... 2,800

July........................................... 346

August......................................... 136

September...................................... 136

Water year 1907-8............................ 2,800

e Estimated.

54 57.0

35

39

39

153

196

58

38

55.5 

65.5 

50.3

e40.0

e40.0 

37.2 

45.4

106

261

259

116 

55.7

94.5

33.7

28.6

26.8

25 87.6

20

22

27

29

72

191

144

51

41

22.6

25.1

30.7

53.7

123

1,030

253

79.5

67.2

20 147

1,130

3,410

3,900

3,090

2,460

2,220

2,290

2,700

6,520

15,500

15,900

7,130

3,310

68,400

2,070

1,700

1,650

63,400

1,390

1,440

1,890

3,200

7,560

61,300

15,600

4,890

4,000

107,000
1S4 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Post Creek at Fltzpatrlck's ranch, near Ronan, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

In 

acre-feet

October 1908,................

November.....................

December.....................

Calendar year 1908.........

January 1909.................

February.....................

March........................

April........................

May..........................

June.........................

July.........................

Augus t.......................

September....................

Water year 1908-9,.........

October 1909.................

November.....................

December.....................

Calendar year 1909.........

January 1910.................

February.....................

March........................

April........................

May..........................

June.........................

July.........................

August.......................

September....................

Water year 1909-10.........

October 1910.................

November.....................

December...... ..............

Calendar year 1910.........

January 1911.................

February.....................

March........................

April.. ......................

May 1-9......................

The period Oct. 1 to May 9.

2,800

32

24

57

32

213

1,020

331

78

78

1,020

1,020

35

35

54

127

260

356

140

62

45

356

356

24

20

37

54

105

35.3

36.0

32.5

20 148

24

24

24

24

32

136

78

78

55

26.5

24

29.1

28.1

66.3

304

210

78

62.2

24 77.8

52.5

55.7

43.9

24 81.8

26

24

27

27

86

116

56

45

27

28.8

31.2

37.2

59.5

165

172

93.8

55.2

35.9

24 69.3

38.5

52.5

31.9

24

20.0

20.0

26.4

36.8

71.1

2,170

2,140

2,000

108,000

1,630

1,330

1,790

1,670

4,080

18,100

12,900

4,800

3,700

56,300

3,230

3,310

2,700

59,200

1,770

1,730

2,290

3,530

10,100

10,200

5,770

3,390

2,140

50,200

2,370

3,120

1,960

48,400

1,230

1,110

1,620

2,190

1,270

14,900

Post Creek at Deschamp's ranch, near Ronan, Mont.

Location.- Staff gage, lat. 47°28', long. 114°02', in T. 20 N., R. 19 W., at Deschamp's 

ranch, just upstream from North Fork of Post Creek, 7 miles southeast of Ronan, and 

10 miles north of St. Ignatius.

Records available.- April to November 1911.

Extremes.- Maximum daily discharge, 546 second-feet June 25 (gage height, 2.95 feet); 

minimum daily, 16 second-feet Apr. 20 (gage height, 0.6 foot).

Remarks.- Several small diversions above gage.

Monthly discharge of Post Creek at Deschamp's ranch, near Ronan, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

April 20-30... 

May...........

June..........

July..........

August........

September.....

October.......

November 1-11.

The period.

1911

55

131

546

294

128

60

44

32

16

44

97

128

52

32

32

32

42.5

69.3

329

184

87.5

40.0

35.5

32.0

927

4,260

19,600

11,300

5,380

2,380

2,180

698

44,300
PEND OREILLE RIVER BASIN 165

Post Creek near St. Ignatius, Mont.

Location.- Chain gage, lat. 47°24', long. 114°05', on line between SW^ sec. 24 and SE^ 

sec. 23, T. 19 N., R. 20 W., on highway bridge on stage road between St. Ignatius and 

Ronan, 1 mile downstream from North Fork of Post Creek and 5 miles north of St. 

Ignatius.

Records available.- September 1911 to September 1917.

Extremes.- Maximum discharge observed, 680 second-feet June 29, 1916 (gage height, 5.20 

feet); minimum observed, 20 second-feet Sept. 3, 1914 (gage height, 2.0 feet).

Remarks.- Several diversions above station. Natural storage In McDonald Lake.

Monthly discharge of Post Creek near St. Ignatius, Mont.

Discharge In second-feet

Maximum Minimum Mean

Run-off

In 

acre-feet

September a9-30, 1911. 

October...............

November..............

December..............

April 1912.......... ..

May...................

June..................

July..................

August................

September.............

November 1912.........

December..............

January 1913..........

February..............

March.................

April.......... .......

May...................

June..................

July..................

August................

September.............

The period..........

October 1913..........

November..............

December..............

Calendar year 1913..

January 1914...........

February..............

March.................

April.................

May...................

June..................

July..................

August................

September.............

Water year 1913-14..

October 1914..........

November..............

December 1-15.........

April 1915............

May...................

June..................

July..................

August................

September.............

October 1915..........

November..............

December..............

January 1916..........

February..............

March.................

April............. ....

May...................

June..................

July..................

August................

eptember.............

Water year 1915-16.. 

a Partly estimated.

81

112

59

54

60

242

414

345

225

142

66

58

52

56

73

377

404

324

160

46

404

59

110

62

48

311

431

248

57

44

431

93

86

66

142

431

377

286

170

134

95

63

63

55

151

109

95

127

680

590

206

206

680

64

59

49

43

42

48

158

102

58

66

67.7

72.3

53.1

48.4

49.4

111

289

196

101

95.2

54

51

43

37

38

43

56

225

142

31

60.6

52.9

45.8

45.9

43.7

58.5

120

335

192

116

33.3

40.6

49.3

43.8

31 93.7

40

32

25

25

28

125

62

22

20

43.1

42.2

41.3

32.8

125

244

180

32.2

25.7

20 75.1

22

44

40

51

89

170

180

95

72

32.5

71.0

53.1

89.5

189

228

223

132

85.1

32

55

55

47

39

39

63

64

117

206

104

77

43.3 

61.7 

55.4

a47.5 

55.6 

62.8 

71.0 

96.7

328

378

152

116

32 122

1,610

4,450

3,160

2,980

2,940

6,820

17,200

12,100

6,210

5,660

3,610

3,250

2,820

2,550

2,690

3,480

7,380

19,900

11,800

7,130

1,980

66,600

2,500

2,930

2,690

67,800

2,650

2,340

2,540

1,950

7,690

14,500

11,100

1,980

1,530

54,400

2,000

4,220

1,580

5,330

11,600

13,600

13,700

8,120

5,060

2,660

3,670

3,410

2,920

3,200

3,860

4,220

5,950

19,500

23,200

9,350

6,900
1S6 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Post Creek near St. Ignatlus, Mont. Continued

Month

Discharge In second-feet

Maximum Minimum Mean

Run-off

In 

acre-feet

October 1916. 

November..... 

December.....

Calendar year 1916. 680

January 1917. 

February.....

March........

April........

May..........

June.........

July.........

August.......

September....

38

38

65

74

200

466

377

38

55

Water year 1916-17. 466

50.5

25.6

a26.7

118

32.6

30.7

30.7

39.5

79.3

275

160.5

29.3

30

23 67.7

3,100

1,770

1,640

85,610

2,000

1,700

1,880

2,350

4,860

16,300

9,850

1,800

1,780

49,000

a Partly estimated.

South Fork of Jocko River near Jocko, Mont.

Location.- Staff gage, lat. 47°12», long. 113°51', In NEi sec. 35, T. 17 N., R. 18 W., 

300 feet downstream from confluence with Middle Fork and 10 miles northeast of Jocko.

Records available.- May 1912 to September 1915.

Extremes.- Maximum discharge observed, 1,080 second-feet May 31, 1913 (gage height, 4.15 

feet); minimum observed, 29 second-feet Dec. 7, 1912 (gage height, 1.93 feet).

Remarks.- No diversion or regulation.

Monthly discharge of South Fork of Jocko River near Jocko, Mont.

Discharge In second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1912 

May 11-31...................

June........................

July........................

August......................

September...................

The period................

1912-13 

October.....................

November....................

December....................

May.........................

June........................

July........................

August......................

September...................

1913-14 

October.....................

November 1-15...............

April.......................

May.........................

June........................

July........................

August......................

September...................

1914-15 

October.....................

November....................

April.......................

May.........................

June........................

July........................

August......................

September...................

668

685

269

137

112

54

62

37

782

760

246

137

91

78

39

127

405

360

166

70

58

164

98

176

251

251

167

105

78

320

277

138

115

54

501

529

182

126

80.0

43

37

28

117

254

129

94

53

40

30

34

120

168

72

47

40

52

55

137

172

106

65

53

47.5

52.0

33.2

528

506

167

121

65.1

56.3

34.3

67.9

285

265

120

56.0

48.7

116

50.1

125

198

214

138

84.1

64.3

20,900

31,500

11,200

7,750

4,760

76,100

2,920

3,090

2,040

20,200

30,100

10,300

7,440

3,870

3,460

1,020

4,040

17,500

15,800

7,580

3,440

2,900

7,130

2,980

7,440

12,200

12,700

8,480

5,170

3,830
PEND OREILLE RIVER BASIN 167

Jocko River near Jocko, Mont.

Location.- Staff gage, lat. 47°10», long. 113°59', In see. 10, T. 16 H., R. 19 W., 500

feet upstream from headworks of Jocko K Canal, 800 feet upstream from Big Knife

Creek, and 2 miles northeast of Jocko. 

Records available.- April 1918 to September 1919. August 1908 to September 1916 at site

8' miles downstream (gage heights and discharge measurements only prior to April 1909) 

Extremes.- Maximum discharge, 6,200 second-feet June 6, 1908 (gage height, 12.25 feet,

site and datum then in use, from high-water mark), float measurement; minimum

observed, 48 second-feet Mar. 7, 1919 (gage height, 3.04 feet). 

Remarks.- Ho diversion or regulation above present site. Jocko K Canal diverts between

the two sites.

Monthly discharge of Jocko River near Jocko, Mont.

Month

April 13-30, 1909. . ............................

May............................................

Hay. ...........................................

Hay............................................

July. ..........................................

Water year 1910-11 ...........................

July. ..........................................

July. ..........................................

April 1914. . ...................................

May............................................

Sent ember. .....................................

Discharge in second-feet

Maximum

111 

957 

1,480 

551 

249 

165

-

134 

191

154 

713 

880 

630 

100 

67 

78

138 

146

880

380 

866 

935 

519 

134 

126

935

118 

106

935

335 

1,000 

1,000 

550 

172 

172

1,000

152 

143 

101

1,000

355 

1,580 

1,580 

515 

208 

173

162 

152

355 

762 

935 

282 

113 

104

Minimum

65 

116 

497 

254 

153 

128

-

106 

84

85 

111 

403 

103 

24 

21 

61

52

85

21

80 

280 

550 

103 

98 

96

_

89 

80

-

86 

265 

550 

147 

148 

134

-

120 

102 

77

-

265 

184

542 

155 

152 

123

125 

108

78 

323 

298 

53 

53 

81

Mean

86.7 

369 

946 

355 

194 

140

-

117 

123 

986 

e85 

110 

387 

5&1 

311 

65.3 

32.3 

58.8

67. f, 

104 

e76

155

e70 

e66 

e80 

176 

408 

724 

243 

118 

109

187

107 

96 

e75

189

e70 

e60 

e65 

244 

700 

808 

301 

162 

157

237

135 

120 

89.6

243

289 

619 

1,040 

297 

185 

137

137 

137 

83.9 

241 

608 

493 

134 

89.7 

87.7

Run-off

ecre-feet

3,100 

22,700 

56,300 

21,800 

11,900 

8,330

124,100

7,190 

7,320 

5,230 

4,720 

6,760 

19,500 

33,900 

18,500 

3,400 

1,990 

3,500

4,130

6,190 

4,610

112,000

4,300 

3,610 

4,920 

10,500 

25,100 

43,100 

14,900 

7,260 

6,490

135,000

6,580 

5,710 

4,610

137,000

4,300 

3,450 

4,000 

14,500 

. 43,000 

48,100 

18,^00 

9,960 

9,340

172,000

8,300 

7,140 

5,510

176,000

5,160 

38,100 

61,900 

18,300 

11,400 

8,150

8,420 

8,150 

2,000 

14,300 

37,400 

29,300 

8,240 

5,520 

5,220

e Estimated.
168 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Jocko River near Jocko, Mont. Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

In 

acre-feet

October 1914....................................

March 26-31, 1915............................... 131

April........................................... 550

May............................................. 570

June............................................ 625

July............................................ 380

August.......................................... 211

September....................................... 173

October 1915.................................... 156

November 1-5.................................... 122

March 15-31, 1916............................... 208

April........................................... 585

May............................................. 712

June............................................ 1,630

July............................................ 1,500

August.......................................... 306

September....................................... ____266

April 11-30, 1918............................... 885~

May............................................. 1,130

June............................................. 2,720

July............................................ 374

August.......................................... 209

September....................................... ____188

The period....................................

October 1918.................................... 107

December........................................ 73

January 1919.................................... 60

February........................................ 58

larch........................................... 83

April......... v ................................ 560

May............................................. 1,080

June............................................ 455

July............................................ 209

August.......................................... 116

September....................................... 78

95

119

134

347

368

223

142

122

106 

12C 

144 

207 

405 

518 

285 

178 

128

189

125

317

485

499

308

154

160

140

122

189

309

514

1,080

760

248

169

370

455

425

192

130

101

536

845

1,370

264

168

111

93

51

51

51

48

90

245

181

112

79

64

99.9

64.6

56.0

54.0

55.9

199

,467

308

149

95.0

71.2

11,600

1,490

18,900

29,800

29,700

18,900

9,470

9,520

8,610

1,210

4,370

18,400

31,600

64,300

46,700

15,200

10,100

21,300

52,000

81,500

16,200

10,300

6,600

188,000

6,140

3,970

3,440

3,000

3,440

11,800

28,700

18,300

9,160

5,840

4,240

Jocko River at Ravalli, Mont.

Location.- Chain gage, lat. 47°17', long. 114°11', In sec. 32, T. 18 N., R. 20 W., 400

feet downstream from railroad station at Ravalli. 

Records available.- October 1906 to April 1911. 

Extremes.- Maximum discharge, 7,500 second-feet (estimated) June 10, 1908 (gage height,

7.63 feet, from high-water mark); minimum discharge observed, 92 seesond-feet Feb. 21

to Mar. 11, 1908 (gage height, 1.3 feet). 

Remarks.- Several diversions above station for irrigation.

Monthly discharge of Jocko River at Ravalli, Mont.

Discharge In second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

October 18-31, 1906. 

November............

December............

January 1907........

February............

larch...............

April...............

May.................

June................

July................

August..............

September...........

The period........

October.1907........

November............

December............

262

493

208

184

324

324

472

1,500

1,860

1,180

376

277

152

162

173

152

173

196

234

308

815

358

262

234

179

224

188

166

200

246

344

842

1,190

585

312

245

234

184

162

184

162

142

208

177

157

Calendar year 1907.

January 1908.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

1,860 142 390

142

514

142

605

760

7,500

693

329

428

108

92

92

124

324

731

329

286

228

125

131

114

238

550

2,410

479

302

286

4,970

13,300

11,600

10,200

11,100

15,100

20,500

51,800

70,800

36,000

19,200

14,600

279,200

12,800

10,500

9,650

282,000

7,690

7,540

7,010

14,200

33,800

143,000

29,500

18,600

17,000
PEND OREILLE RIVER BASIN 169

Monthly discharge of Jocko River at Ravalli, Mont. Continued

Discharge in second-feet

Maximum Minimum Mean

Run-off

In 

acre-feet

October 1908................................... 247

November....................................... 210

December....................................... 195

Calendar year 1908........................... 7,500

January 1909...................................

February.......................................

March.......................................... 202

April.......................................... 202

May............................................ 1,240

June........................................... 1,540

July........................................... 620

August......................................... 515

September...................................... ___207

Water year 1908-9............................ 1,540

October 1909................................... 192

November........... ........................... 224

December....................................... ___179

Calendar year 1909........................... 1,540

January 1910...................................

February.......................................

March....i.....................................

April.......................................... 1,120

May............................................ 1,590

June........................................... 705

July........................................... 180

August......................................... 180

September..........................4........... ___180

Water year 1909-10........................... 1,590~

October 1910................................... 250

November....................................... 220

December....................................... ___167

Calendar year 1910........................... 1,590

January 1911................................... 140

February....................................... 158

March.......................................... 175

April 1-8............................1.......... 200

The period...................................

210

195

160

220

20C

_T72_

455

164

182

182

345

264

224

192

e!50 

e!50 

181 

187 

486 

914 

406 

255 

195

293

179

168

179

185

185

a!79

290

235

705

205

110

110

155

e!70

e!70

e200

602

942

592

158

125

167

110 288

167

167

120

180

191

148

286

100

175

114

110

131

191

13,500

11,900

10,600

514,000

9,220

8,330

11,100

11,100

29,900

54,400

25,000

15,700

11,600

212,000

11,300

11,000

11,000

210,000

10,500

9,440

12,300

35,800

57,900

23,300

8,480

7,690

9,940

209', 000

11,100

11,400

9,100

207,000

7,010

6,110

8,060

5,030

55,800

a Partly estimated. 

e Estimated.

Middle*Fork of Jocko River near Jocko, Mont.

Location.- Staff gage, lat. 47°11', long. 113°50', near north line of sec. 35, T. 17 N., 

R. 18 W., 500 feet upstream from confluence with South Fork and 10 miles northeast of 

Jocko.

Records available.- May 1912 to September 1915.

Extremes.- Maximum discharge observed, 134 second-feet June 1, 1912 (gage height, 1.4 

feet); minimum observed, 8 second-feet Dec. 15, 1915 (gage height, 0.45 foot).

Remarks.- No diversion or regulation.

Monthly discharge of Middle Fork of Jocko River near Jocko, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1912

May.......

June......

July......

August....

September.

135

154

67

50

52

81.5

92.1

58.5

58.7

29.0

The period.

5,010

5,480

3,580

2,380

1,750

18,200
170 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Kiddle Pork of Jocko River near Jocko, Mont. Continued

Month

1913-13

May. ...........................................

1913-14

April. .........................................

1914-15

Discharge in second-feet

Maximum

25 

20 

16 

24 

114 

111 

64 

40 

24

22 

13 

9 

29 

71 

58 

35 

28 

20

47 

25 

10 

47 

45 

39 

38 

30 

24

Minimum

19 

16 

15 

23 

22 

65 

41 

24 

19

13 

10 

8 

13 

28 

36 

28 

20 

17

18 

10 

9 

18 

31 

35 

30 

20 

18

Mean

21.6 

18.6 

15.1 

23.6 

63.1 

81.0 

51.5 

33.2 

21.2

16.9 

11.4 

8.7 

19.7 

52.0 

43.9 

30.8 

23.8 

18.4

32.7 

14.9 

9.7 

32.8 

37.3 

36.5 

34.1 

23.6 

21.6

Run-off 

in 

acre-feet

1,330 

1,110 

928 

234 

3,880 

4,820 

3,170 

2,040 

1,260

1,040 

678 

224 

1,170 

3,200 

2,610 

1,890 

1,460 

1,090

2,010 

887 

231 

1,950 

2,290 

2,170 

2,300 

1,450 

1,290

North Fork of Jocko River near Jocko, Mont.

Location.- Staff gage, lat. 47°12 T , long. 113°50', in HWi sec. 23, T. 17 N., R. 18 W., 

three-quarters of a mile upstream from Palls Creek, and 11 miles northeast of Jocko.

Records available.- May 1912 to September 1915.

Extremes.- Maximum discharge observed, 492 second-feet May 31, 1913 (gage height, 3.4 

feet); minimum observed, 6 second-feet Dec. 13, 1913 (gage height, 0.55 foot).

Remarks.- No diversion or regulation.

Monthly discharge of North Pork of Jocko River near Jocko, Mont.

Month

1912 

May. ...........................................

The period ...................................

1912-13

July. ..........................................

1913-14

July. ..........................................

Discharge in second-feet

M

Maximum

303 

322 

140

36 

35

_

27 

35 

23 

50 

492 

466 

135 

33 

20

15 

12 

7 

92 

383 

295 

83 

19 

26

Minimum

56 

145 

37 

22 

21

_

23 

24 

13 

24 

57 

145 

34 

20 

11

12 

7 

6 

21 

87 

85 

20 

9.5 

8.0

Mean

201 

236 

75.2 

29.5 

25.3

_

24.4 

28.8 

12.5 

37 

231 

305 

60.3 

27.8 

13.9

13.0 

9.30 

6.69 

47.8 

252 

162 

54.6 

13.8 

13.3

Run- off 

in 

acre-feet

12,400 

14,000 

4,620 

1,810 

1,510

34,300

1,500 

1,710 

953 

367 

14,200 

18,100 

3,710 

1,710 

827

779 

553 

172 

2,840 

15,500 

9,640 

3,360 

843 

785
PEND OREILLE RIVER BASIN 171

Monthly discharge of North Pork of Jocko River near Jocko. Mont. Cont

Month

1914-15

Nay. ............................................

July. ...........................................

Discharge in second-feet

Maximum

106 

60 

17 

51 

198 

187 

177 

96 

59 

51

Minimum

16 

17 

15 

51 

51 

92 

96 

40 

18 

20

Mean

61.5 

29.1 

15.8 

51.0 

114 

159 

125 

71.0 

24.5 

25.8

inued

Run-off 

in 

acre-feet

5,780 

1,750 

576 

569 

6,780 

9,780 

7,520 

4,570 

1,510 

1,540

Falls Creek near Jocko, Mont.

Location.- Staff gage, lat. 47°15«, long. 115°51', in NEi sec. 22, T. 17 N., R. 18 W., a 

quarter of a mile upstream from mouth and 10 miles northeast of Jocko.

Records available.- May 1912 to September 1915.

Extremes.- Maximum discharge observed, 89 second-feet May 51 and June 1, 1912 (gage 

height, 1.5 feet); minimum observed, 1.0 second-foot Dec. 6, 1915 (gage height, 0.0 

foot).

Remarks.- No diversion or regulation.

Monthly discharge of Palls Creek near Jocko, Mont.

Month

1912

1912-15

1915-14

May............................................

1914-15

Mmr

Discharge in second-feet

Maximum

89 

89 

20 

8.0 

7.0

_

7.0 

102 

96 

36 

6.4 

4.5

4.2 

2.8

10.2 

85 

57 

18 

5.5 

11.5

51 

9.8 

3.8 

4.9 

58 

60 

58 

29 

14 

16

Minimum

58 

20 

8.0 

7.0 

7.0

4.5 

8.6 

27 

6.1 

4.4 

2.5

2.8 

1.0

2.6 

9.9 

19 

5.6 

2.4 

2.1

4.8 

5.8 

1.5 

5.9 

3.8 18 ' 

25 

15 

5.4 

4.0

Mean

68.0 

54.5 

14.6 

7.29 

7.00

5.46 

54.1 

49.0 

15.2 

5.55 

5.11

5.15 

2.02 

1.00 

5.68 

49.0 

51.7 

11.4 

5.87 

4.50

16.0 

6.19 

2.99 

4.40 

29.5 

46.8 

41.9 

21.4 

6.79 

10.8

Run-off 

in 

acre-feet

2,830 

3,250 

898 

448 

417

7,820

556 

2,100 

2,920 

812 

529 

185

192 

120 

11.9 

558 

5,010 

1,890 

701 

258 

268

984 

568 

71.2 

52 »4 

1,760 

2,880 

2,490 

1,520 

418 

645

Big Knife Creek near Jocko, Mont.

Location.- Staff gage, lat. 47°09', long. 115°57», in NWj sec. 14, T. 16 N., R. 19 W., 

200 feet upstream from headgate of Big Knife Canal and 2i miles northeast of Jocko.

Records available.- August 1910 to September 1916. August 1908 to August 1910 at site 1 

mile downstream.

Extremes.- Maximum discharge observed, 78 second-feet June 50, 1916 (gage height, 3.65 

feet); minimum observed, 4.3 second-feet Apr. 17, 1911 (gage height, 1.83 feet).

Remarks.- Discharge in August and Seotember 1910 affected by operation of canal.
172 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Big Knife Creek near Jocko, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

1909 

April 13-30.................

May.........................

June........................

July........................

August......................

September...................

The period................

1909-10 

October.....................

November....................

January.....................

February....................

March.......................

April.......................

May.........................

June........................

July........................

August......................

September...................

' 1910-11 

October.....................

November....................

December....................

January.....................

February....................

March.......................

April.......................

May.......... ...............

June........................

July........................

August......................

September...................

The year..................

1911-12 

October.....................

November....................

December....................

May 10-31...................

June........................

July........................

August......................

September...................

1912-13 

October.....................

April 22-30.................

May.........................

June........................

July........................

August......................

September...................

1913-14 

October.....................

November....................

December 1-12...............

April.......................

May.........................

June........................

July........................

August.................'.....

September...................

1914-15 

October.....................

May 24-31...................

June........................

July........................

August......................

September...................

7.8

22

52

43

22

17.6

13.5

11.2

8.9 

22 

32 

22 

15 

12

3.5|

7 

6.6

6.6

18

40

30

16

12

40

10

8.0

40

50

40

19

13

9.4

7.4

38

40

28

16

14

12

9.4

7.1

5.9

26

33

23

14.1

12.2

14.

34

34

28

20

14

7.7

28

22

15.4

13.0

7.08

12.0

37.4

27.9

18.0

14.4

10.5 

9.7

7.5 7.5

13

13

12 

3.7 

.9

11.7

10.3

e7.8

e7.5

7.8

12.3

19.1

17.1

13.0

9.38

1.31

6.2 

5.5

4.3

5.6

21

16

12

9.4

6.58

5.

5.00

5.00

4.00

4.70

4.70

8.98

32.0

20.6

13.4

10.7

10.2

8.0

30

19

13

9.5

7.8

6.5

6.5

28

16

14

10

9.4

7.3

5.8

4.6

6.0

21

14.2

10.2

9.5

30

27

20

13

11

8.88

7.15

6.00

22.4

37.5

26.5

15.6

10.7

8.45

6.90

15.1

34.2

20.2

14.8

11.8

10.5

31.2

31.0

24.7

16.5

12.5

253

738

2,230

1,720

1,110

857

6,910

719

613

480

416

481

732

1,170

1,020

799

577

78

405

356

307

307

222

289

280

552

1,900

1,270

824

637

7,350

546

425

369

977

2,230

1,630

959

637

520

124

928

2,040

1,240

910

702

627

500

. 152

325

990

1,590

1,080

726

625

646

495

1,840

1,520

1,010

744

e Estimated.
PEND OREILLE RIVER BASIN 173

Monthly discharge of Big Knife Creek near Jocko, Mont. Continued

Discharge In second-feet

Maximum Minimum Mean

Run-off

in 

acres-feet

October.....

November....

December....

April 14-30. 

May.........

June........

July........

August......

September...

1915-16

14

8.2

13

25

78

74

37

21

8.9

12

20

23

20

14

10.4

7.61

7.05

9.95

17.1

47.0

49.5

27.6

17.8

640

453

433

336

1,050

2,800

3,040

1,700

1,060

Agency Creek near Jocko, Mont.

Location.- Staff gage, lat. 47°08", long. 113°57', in T. 16 N., R. 19 W., just upstream

from intake of Matt ditch, 2 miles east of Jocko.

Records available.- August 1908 to September 1916 (gage heights only prior to April 1909). 

Extremes.- Maximum discharge observed, 228 second-feet June 20, 1916 (gage height, 3.30

feet); minimum observed, 2.0 second-feet Dec. 12, 1913 (gage height, 1.38 feet). 

Remarks.- No diversion or regulation.

Monthly discharge of Agency Creek near Jocko, Mont.

Discharge In second-feet

Mean

Run-off

in 

acre-feet

April 16-30, 1909....

May..................

June.................

July.................

August...............

September............

The period.........

October 1909.........

November.............

January 1910.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

October 1910.........

November.............

December.............

Calendar year 1910.

January 1911.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

Water year 1910-11.

October 1911.........

November.............

December.............

Calendar year 1911.

April 1912...........

May..................

June.................

July.................

August...............

September............

e Estimated. 

527283 O - 43 - 12

10.6

69

104

70

24

10.3

50

60

41

13

6.5

6.7

5.5 

7.8

12

31

68

33

11

9.6

68

9.0 

6.0

68

10

44

58

49

14

11

4.4

10.3

49

15.3

8.6

7.6

6.43

22.9

69.8

34.0

12.1

8.51

c 6 

5.1

5

23

13

6.6

5.1

4.5

6.58 

5.95 

e6 

e6

e6.5 

17.6 

38.0 

23.3 

9.12 siei

5.24

4.2 

4.6

4.83

5.43

5.00

11.1

3.1

9.2

34

11

6.6

6.4

5.30

4.00

3.60

5.16

17.8

45.7

18.5

8.49

8.03

11.0

6.3 

4.0

7.79

4.73

4.00

11.1

4.0

7.8

28

14

9.2

7.7

7.19

28.4

44.8

27.0

11.6

9.56

191

1,410

4,150

2,090

744

506

9,090

405

354

369

333

400

1,050

2,340

1,390

561

345

312

297

325

307

8,030

326

222

221

307

1,090

2,720

1,140

522

478

7,960

479

281

246

428

1,750

2,670

1,660

713

569
174 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Agency Creek near Jocko, Mont. Continued

Discharge in second-feet

Maximum Minimum Mean

6.97

6.38

28.8

47.2

20.8

9.65

5.03

5.66

3.99

5.90

42.8

39.2

17.8

7.36

5.70

8.37

37.2

29.7

11.8

10.6

13.4

6.70

8.59

19.9

94.6

58.5

12.0

8.08

Run-off

in 

acre-feet

October 1912.......

April 22-30, 1913.. 

May................

June...............

July...............

August.............

September..........

October 1913.......

November...........

April 1914.........

May................

June...............

July...............

August.............

September..........

October 1-20, 1314. 

June...............

July...............

August.........'....

September..........

October 1915.......

November 1-5.......

April 14-30, 1916.. 

May................

June...............

July...............

August.............

September..........

6.7

80

70

37.2

11.6

6.5

7.2

6.4

8.9

70

55

28

9.4

7.2

10.6

50

46

18.2

31.0

46

7.0

16

49

228

110

20

9.0

6.5 

6.5

4.8

37.2

11.4

6.7

4.0

4.6 

2.2 

2.8 

9.0

29

9.6

5.5

4.8

5.6

30

17.5

7.0

7.3

7.0

6.4

6.0

11

21

22

8.6

5.8

429

114

1,770

2,810

1,280

593

299

348

237

351

2,630

2,330

1,090

453

339

332

2,210

1,830

726

631

842

66

290

1,220

5,630

3,600

738

481

Blodgett Creek near Jocko, Mont.

Location.- Staff gage, lat. 47°09', long. 113°58', "in T. 16 N., R. 19 W., l£ miles

northeast of Jocko.

Records available.- May to December 1909. 

Extremes.- Maximum discharge observed, 3.4 second-feet June 3 (gage height, 1.00 foot);

minimum observed, 0.4 second-foot at times in November and December (gage height,

0.50 foot).

____________Monthly discharge of Blodgett Creek near Jocko, Mont.

Discharge in second-feet

Maximum Minimum Mean

Run-off

in 

acre-feet

May 22-31. 

June......

July......

August.... 

September. 

October... 

November..

2.2

3.4

2.2

1.3

1.0

.7

.5

1.1

2.0

1.3

.8

.6

.5

.4

1.67

2.61

1.72

1.05

.69

.55

.44

33.1

155

106

63.3

41.1

33.8

26.2

The period. 458

Finley Creek near Jocko, Mont.

 

Location.- Staff gage, lat. 47°06', long. 114°03', in sec. 31, T. 16 N., R. 19 W., at

ford about 100 feet upstream from highway bridge, an eighth of a mile downstream from

confluence of East and West Forks, 4 miles southwest of Jocko, and 5 miles southeast

of Arlee.

Records available.- August 1908 to September 1915 (gage heights only prior to April 1909). 

libctremes.- Maximum discharge observed, 269 second-feet June 3, 1909 (gage height, 2.3

feet ); minimum observed, 4.5 second-feet Dec. 12, 1913 (gage height, 0.95 foot). 

Remarks.- Several diversions for irrigation. No regulation.
PEND OREILLE RIVER BASIN 175

Monthly discharge of Flnley Creek near Jocko, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off ,

In 

aere-feet

April 15-30, 1909....

May..................

June.................

July.................

August...............

September............

The period.........

October 1909.........

November.............

April 1910...........

May..................

June.................

July.................

August...............

September............

October 1910.........

November.............

January 1911.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

October 1911.........

November.............

December.............

Calendar year 1911.

January 1912.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

Water year 1911-12.

October 1912.........

November.............

December.............

Calendar year 1912.

April 28-30, 1913....

May..................

June.................

July.................

August...............

September............

October 1913.........

November.............

December 1-12........

April 1914...........

May..................

June.................

July.................

August...............

September............

October 1-20, 1914... 

May 24-31, 1915......

June.................

July.................

Augus t...............

September............

56

185

269

62

24

19.4

12.0

19.4

136

115

43

11

6.2

7.8

8.6

11

24

57

110

44

13

10

13

8.8

110

29

124

118

78

24

16

124

124

73

158

130

48

11

8.8

12

8.7

6.3

28

87

100

41

9.3

7.1

14.8

91

95

61

24

14

19.4

34

68

19.4

9.3

9.3

32.5 

70.5 

147 

35.0 

15.0 

J2.2

9.3

9.3

20

43

12

6.2

4.7

5.0

7.4 

8.2

8.2

19

46

14

7.1

7

9.39

11.1

55.3

60.2

23.1

8.45

5.38

6.97

8.22

9.23

6.10

8.00

10.0

11.6

38.6

81.9

24.9

10.1

8.12

8.8 9.90

7.32

7.00

18.6

12

30

46

18

13

11

7.0

8.0

9»0

23.1

76.8

88.8

41.1

16.4

14.4

25.7

11.0 

e8.0 

e7.0

25.9

55

38

48

10

6.4

4.6

5.8

6.3

4.5

9.6

28

43

9.3

sis

6.0

82

42

23

7.8

7.4

61.2

73.5

77.8

29.1

8.90

5.82

9.04

7.34

5.57

20.2

69.5

66.6

21.7

8.54

6.22

 9.79 

85.0 

73.4 

38.1 

14.7 

9.53

1,030

4,330

8,750

2,150

922

726

17,900

577

660

3,290

3,700

1,370

520

331

415

505

549

375

444

615

690

2,370

4,870

1,530

621

483

609

436

430

13,500

430

460

553

1,370

4,720

5,280

2,530

1,010

857

18,700

676

476

430

18,800

1,090

4,520

4,630

1,790

547

346

556

437

133

1,200

4,270

3,960

1,330

525

370

388

1,350

4,370

2,340

904

567

e Estimated.
176 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

East Finley Creek near Jocko, Mont.

Location.- Staff gage, lat. 47°06', long. 114°02', near south line of sec. 32, T. 16 H., 

R. 19 W., Just upstream from Intake of Indian ditch, 200 feet downstream from crossing 

of Bureau of Reclamation canal, 4 miles southwest of Jocko, and 6 miles southeast of 

Arlee.

Records available.- August 1908 to September 1915 (gage heights only prior to April 1909).

Extremes.- Maximum discharge observed, 132 second-feet June 3, 1909 (gage height. 2.84 

feet); minimum observed, 2.5 second-feet Apr. 2, 1912 (gage height, 1.23 feet).

Remarks.- Bureau of Reclamation canal diverts water above station at times. Ho regula-

__ Monthly discharge of East Finley Creek near Jocko, Mont.

Month

Discharge in second-feet

Maximum Minimum Mean

Run-off

In 

acre-feet

April 15-30, 1909....

May..................

June.................

July.................

August........... ...

September............

The period.........

October 1909.........

November.............

January 1910.........

February.............

March................

April................

May..................

June.................

July.................

August....'...........

September............

October 1910........ .

November.............

December.............

January 1911.........

February.............

March................

April................

May..................

June.................

July.................

The period.........

January 1912.........

February.............

March................

April................

May..................

June.................

July.................

August...............

September............

The period.........

October 1912.........

November.............

December.............

Calendar year 1912.

April 22-30, 1913....

May..................

June.................

July.................

August...............

September............

October 1913.........

November.............

December 1-12........

April 1914...........

May..................

June.................

July.................

August...............

September............

e Estimated.

5.

94

132

48

19

11

6.8

11

64

85

39

12

5.1

6.3

5.5 

6.9

24

50

82

24

30

51

58

37

11

9.

7.1

58

30

103

88

34

11

6.3

11 

9.3 

5.5

10.4

55

50

25 

V.O 

7.3

3.

6.

34

14

4.26

26

67.5

25.5

9.69

6.97

4.1 

4.1

5.0

6.3

24

13

5.2

4.1

3.6

5.18 

5.21 

e5.0 

e5.0

6.52 

20.7 

40.3 

21.8 

7.82 

4.35 

4.63

3.5 

4.9

3.3

15

27

3.1

5.07

5.76

5.0

3.00

3.00

3.10

6.52

25.5

53.6

14.0

2.5

7.9

28

8.8

7.4

6.4

3.0

2.5

2.5

10.8

35.6

41.5

17.8

8.68

7.60

6.28 

e4.0 

e3.5

12.0

11

9.2

34

10

6.5

4.1

4.6

5.5

4.5

2.8

10.6

23

7.1

4.7

4.2

16.0

35.6

53.2

19.1

8.95

5.26

7.11

6.60

5.04

6.56

39.6

34.8

13.6

5.79

5.53

135

1,600

4,020

1,570

596

415

318

310

307

278

401

1,230

2,480

1,300

481

267

276

312

343

307

184

167

191

388

1,570

3,190

861

7,510

184

144

154

643

2,190

2,470

1,090

534

452

7,860

386

238

215

286

2,190

3,170

1,170

550

313

437

393

120

390

2,430

2,070

836

356

329
PEND OREILLE RIVER BASIN 177

Monthly discharge of East Finley Creek near Jocko, Mont. Continued

Month

July. .........................................

Discharge in second-feet

Maximum

16 

71 

71 

55 

16 

14

Minimum

45 

24 

17 

7.0 

7.6

Mean

9.06 

54.1 

47.0 

28.5 

10.5 

9.14

Run-off 

in 

acre-feet

557 

858 

2,800 

1,750 

646 

544

Indian ditch near Jocko, Mont.

Location.- Staff gage, lat. 47°06', long. 114°02', near south line of aec. 32, T. 16 N., 

R. 19 W., 200 feet downstream from intake on East Finley Creek, 4 miles southwest of 

Jocko, and 6 miles southeast of Arlee.

Records available.- August 1908 to September 1916.

Remarks.- Flow"completely regulated by diversion dam. Water diverted during greater part 

of year for stock and irrigation uses.

Monthly discharge of Indian ditch near Jocko, Mont.

Month

1909 

April 17-30. ..................................;

May............................................

July. ..........................................

1909-10

April. .........................................

May. ...........................................

July. ..........................................

1910-11 

October. .......................................

April. .........................................

May. ...........................................

July. ..........................................

1912

April. .........................................

May............................................

July. ..........................................

1912-13

April 2S-30.......... ..........................

July. ..........................................

Discharge in second-feet

Maximum

3.0

28 

20 

22 

12.5 

7.6

-

5.0 

4-. 6 

24 

18 

22 

13 

5.3 

6.2

5.1 

6.4 

17. 

26 

23 

14

5.3 

23 

29 

18 

4.0 

6.7

-

8.4 

10.0 

10.0 

27.9 

14.2 

8.3 

5.0

Minimum

1.8 

1.6 

2.0 

8.0 

4.4 

4.2

-

3.4 

3.5 

1.0 

12 

14 

5.4

z',6

3.6 

4.3 

2.6 

0 

11 

2.5

.6 

2.4 

4.1 

3.1 

1.4 

3.1

-

6.0 

7.2 

5.5 

9.0 

2.2 

5.1 

3.4

Mean

2.02 

8.45 

10.7 

14.2 

6.78 

5.11

-

4.08 

3.98 

10.3 

14.6 

19.2 

8.28 

3.87 

4.43

4.74 

5.38 

5.21 

10.4 

16.5 

9.59

e2.0 

el. 5 

el. 5 

3.64 

10.5 

19.1 

5.62 

2.81 

5.08

-

7.15 

9.20 

7.99 

20.2 

5.84 

6.55 

4.11

Run- off 

in 

acre-feet

56

520 

637 

873 

417 

304

2,810

251 

237 

613 

898 

1,140 

509 

238 

264

291 

320 

310 

640 

982 

590

123 

86 

92 

217 

646 

1,140 

346 

173 

302

3,120

440 

164 

491 

1,200 

359 

403 

245

e Estimated.
178 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Indian ditch near Jocko, Mont. Continued

Month

1913-14

May............................................

1914-15

July. ..........................................

1915-16

Discharge in second-feet

Maximum

7.5 

6.9 

3.6 

9.5 

25 

16 

11 

5.3 

8.5

9.8 

11.5 

13.8 

9.4

10.6

7 t 6 

6.0 

3.0 

1.7 

16 

29 

22 

' 6.6

Minimum

3.5 

3.6 

2.2 

2.2 

5.5 

5.9 

4.8 

3.9 

3.9

.7 

2.8 

1.9 

5.0

1.7 

5.5 

.7 

.4

.0 

3.0 

2.4 

1.7

Mean

5.92 

5.50 

2.84 

5.95 

16.1 

11.2 

7.76 

4.90 

6.23

7.64 

5.54 

7.02 

5.35 

6.96

4.21

5.76 

1.32 

1.04 

7.60 

9.47 

4.20 

3.66

Run- off 

In 

acre-feet

364 

327 

68 

354 

990 

666 

477 

301 

371

470 

330 

43 2 

329 

414

259 

57 

45 

64 

452 

582 

258 

218

Valley Creek near Ravalli, Mont.

Location.- Staff gage, lot. 47°14«, long. 114°10«, in T. 17 N., R. 20 W., near mouth at

crossing of highway between Jocko and Ravalli, 3 miles south of Ravalli and 8 miles

west of Arlee.

Records available.- April 1909 to June 1910. 

Extremes.- Maximum dally discharge, 290 second-feet June 2, 3, 1909 (gage height, 2.7

feet); minimum dally, 19.1 second-feet at times during August to December 1909

(gage height, 1.15 feet).

Monthly discharge of Valley Creek near Ravalli, Mont.

Month

1909 

April 17-30. ...............................

July. .................................... .

The period. .................................

1909-10 

October. ............................. .

March SO-31. ..........................

April..................... ..................

May. .....................................

Discharge in second-feet

Maximum

252 

290 

69 

33 

38

_

21 

49

172 

161 

79

Minimum

33 

69 

33 

19.1 

19.1

_

19.1 

19.1

40 

64 

26

Mean

28.3 

116 

169 

52.6 

24.3 

21.9

_

20.2 

24.0 

76.4 

98.7 

107 

42.3

Run- off 

In 

acre-feet

786 

7,130 

10,100 

3,230 

1,490 

1,300

24,000

1,240 

1,430 

1,820 

5,870 

6,580 

2,520

Revais Creek near Dixon, Mont.

Location.- Staff gage, lat. 47°17', long. 114°23«, in T. 18 N., R. 22 W., downstream

from highway bridge 4 miles southwest of Dixon.

Records available.- April 1911 to September 1916, October 1917 to September 1919. 

Extremes.- Maximum discharge observed, 512 second-feet June 19, 1916 (gage height, 3.7

feet); minimum observed, 3 second-feet Jan. 23 to Mar. 19 and Sept. 13, 1918. 

Remarks.- No diversion or regulation.
PEND OREILLE RIVER BASIN - 179

Monthly discharge of Revais Creek near Dixon, Mont.

Month

1911

July. ..........................................

1911-12

March. .........................................

April. . ........................................

1912-13

1913-14

The year ....................................

1914-15

April ..........................................

May. ...........................................

1915-16

April .

September. .....................................

Discharge in second-feet

Maximum

144 

154 

67 

18 

18

_

18 

14 

11 

11 

8 

12 

67 

226 

154 

45 

14 

11

226

8 

11 

8 

8 

11 

8 

81 

336 

266 

50 

14 

11

336

12 

16 

11 

8 

8 

11 

97 

202 

177 

29 

11 

8

202

14 

18 

14 

12.5 

74 

139 

61 

26 

16 

12.5

10.4 

8.9 

8.9 

8.3 

10.4 

102 

C14 

271 

472 

228 

24 

13.1

472

Minimum

45 

55 

14 

11 

8

_

11 

11 

8 

8 

8 

8 

12 

45 

36 

14 

11 

11

8

8 

8 

8 

7 

7 

7 

7 

40 

50 

14 

9.5 

7

7

7 

9.5 

7 

6 

6 

6 

8 

50 

29 

11 

6 

6

6

6.0 

11.0 

8.0 

6.0 

11.9 

26.0 

23.0 

11.0 

8.0 

7.0

7,6 

7.6 

6.6 

6.6 

6.6 

6.6 

37 

61 

LOO 

26 

10.1 

7.4

6.6

Mean

'69.3 

102 

32.1 

13.8 

13.6

_

14.8 

11.3 

10.4 

8.9 

8.0 

8.5 

40.8 

130 

87.1 

24.2 

11.9 

11.0

30.6

8.0 

8.7 

8.0 

7.6 

7.8 

7.4 

41.4 

147 

123 

27.9 

10.7 

8.2

33.9

8.3 

12.2 

7.8 

6.5 

6.5 

8.5 

42.6 

118 

65.5 

17.1 

7.5 

6.5

25.6

9.8 

15. & 

10'. 0 

9.06 

38.9 

74.8 

42.3 

19.9 

10.6 

8.86

8.76 

7.73 

6.95 

6.68 

7.95 

36.9 

73.8 

114 

238 

81.2 

16.4 

9.85

50.5

Run- off 

In 

acre-feet

4,260. 

6,070 

1,970 

848 

809

14,000

910 

672 

640 

547 

460 

523 

2,430 

7,990 

5,180 

1,490 

732 

655

22,200

492 

518 

492 

467 

433 

455 

2,460 

9,040 

7,320 

1,720 

658 

488

24,500

510 

726 

480 

400 

361 

523 

2,530 

7,260 

3,900 

1,050 

461 

387

18,600

603 

928 

238 

323 

2,310 

4,600 

2,520 

1,220 

652 

527

539 

460 

427 

411 

457 

2,270 

4,390 

7,010 

14,200 

4,990 

1,010 

586

36j 800
180 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Revais Creek near Dixon, Mont. Continued

Month

- 1917-18

February. ....................... . 

May. ............................. 

July. ..........................................

1919 

April. .........................................

Discharge in second-feet

Maximum

9 

8 

142 

138 

3 

42 

106 

191 

204 

38 

16 

5

204

112 

144 

87 

21 

11 

7

-

Minimum

8 

8 

8 

3 

3 

3 

22 

78 

38 

16 

5 

2

3

15 

55 

21 

7 

4 

4

-

Mean

8.26 

8.00 

18.7 

46.5 

3.00 

8.55 

69.6 

122 

132 

23.3 

9.94 

4.93

37.9

42.0 

92.1 

43.6 

9.97 

5.42 

4.37

-

Run- off 

in 

acre-feet

508 

476 

1,150 

2,860 

 167 

526 

4,140 

7,500 

7,860 

1,370 

611 

293

27,500

2,500 

f,660 

,590 

613 

333 

260

, 12,000

Yearly discharge of Revais Creek near Dixon, Mont.

Tear

1914 ............

1916 ............

Year ending Sept. 30

Mean discharge 

in second-feet

30.6 

33.9 

25.6 

50.5 

37.9

Run- off in 

acre-feet

22,200 

24,500 

18,600 

36,800 

27,500

Calendar year

Mean discharge 

in second-feet

29.6 

34.2

Run-off in 

acre-feet

21,510 

24,760

Thompson River near Thompson Palls, Mont.

Location.- Staff gage, lat. 47°36', long. 115°14', in SEi sec. 7, T. 21 N., R. 28 W., at

the second highway bridge, 1 mile upstream from mouth of Thompson River and 8 miles .

east of Thompson Palls. 

Records available.- February to September 1911. 1912 (occasional gage readings and diacharge figures). 

Extremes.- Maximum daily discharge, 1,690 second-feet May 6, 1911 (gage height, 5.80

feet); minimum discharge observed, 140 second-feet Mar. 20, 1912. 

Remarks.- One large diversion for irrigation half a mile above station.

Monthly discharge of Thompson River near Thompson Falls, Mont.

Month

1911

April. .........................................

May............................................

July. ..........................................

The period. ..................................

Discharge in second-feet

Maximum

625 

1,260 

1,690 

1,580 

970 

430 

335

-

Minimum

150 

460 

970 

880 

375 

198 

190

-

Mean

e!50 

a!60 

338 

963 

1,240 

1,180 

547 

307 

256

-

Run- off 

in 

acre-feet

9,220 

8,890 

20,800 

57,300 

76,200 

70,200 

33,600 

18,900 

15,200

310,000

a Partly estimated, 

e Estimated.
PEND OKEILLE RIVER BASIN 181

Prospect Creek near Thompson Palls, Mont.

Location.- Staff gage, lat. 47°35', long. 115°22', In NE^NE^ sec. 18, T. 21 N., R. 29

W., at first highway bridge upstream from Dry Creek, 1 mile southwest of Thompson

Palls.

Drainage area.- 139 square miles.

Records available.- February to September 1911. 1912 (occasional figures of discharge.), 

Extremes.- Maximum dally discharge, 1,250 second-feet Mar. 23, 1911 (gage height, 6.1

feet); minimum discharge observed, 47 second-feet Sept. 13, 1912 (gage height, 2.6

feet). 

Remarks.- No diversion or regulation.

Monthly discharge of Prospect Creek near Thompson Palls, Mont.

Month

1911

April..........................

Discharge in second-feet

Maximum

88 

1,250 

1,080 

990 

840 

307 

120 

66

-

Minimum

82 

80 

397 

365 

322 

122 

65 

50

-

Mean

85.4 

385 

716 

790 

549 

189 

95.2 

59.6

-

Per 

square 

mile

0.614 

2.77 

5.15 

5.68 

3.95 

1.36 

.685 

.429

-

Run- off

Inches

0.39 

3.19 

5.75 

6.55 

4.41 

1.57 

.79 

.48

-

Acre-feet

2,880 

23,700 

42,600 

48,600 

32,700 

11,600 

5,850 

3,550

171,000

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

Location.- Water-stage recorder, lat. 48°29', long. 116°54', in SWi sec. 5, T. 59 H., R. 

4 W., at southwest end of Priest Lake, 2 miles northwest of Coolin. Zero of gage, 

2,435.06 feet, datum of Coast and Geodetic Survey, or 2,437.99 feet, datum of Geological Survey, above mean sea level.

Drainage area.- 572 square miles.

Records available.- June 1911 to September 1918 (only fragmentary gage heights prior to 

July 1912), May 1919 to September 1938.

Extremes.- Maximum discharge recorded, 7,290 second-feet May 30, 1917 (gage height, 6.83 

feet); 'minimum recorded, 118 second-feet Nov. 25, 1936 (gage height, -0.32 foot).

Remarks.- No diversions above station.

Monthly discharge of Priest River at outlet of Priest Lake, near Coolin, Idaho

Month

1912

1912-13

1913-14

May................. ..........

July............ ..............

The year ...................

Discharge in second-feet

Maximum

1,570 

1,080 

695

520 

1,110 

1,040 

5,450 

5,970 

3,220 

1,210 

568

485 

715 

715

911 

3,170 

5,030 

4,510 

2,700 

985 

485

5,030

Minimum

1,080 

548 

520

425 

470 

695 

2,100 

3,410 

1,280 

578 

458

385 

408 

485

625 

943 

3,170 

2,760 

985 

385 

280

280

Mean

1,300 

786 

-604

474 

824 

837 

3,340 

4,890 

2,080 

833 

514

451 

542 

586 

779 

743 

717 

2,060 

4,300 

3,520 

1,780 

628 

380

1,380

Per 

square 

mile

2.27 

1.37 

1.06

.829 

1.44 

1.46 

5.84 

8.55 

3.64 

1.46 

.899

.788 

.948 

1.02 

1.36 

1.30 

1.25 

3.60 

7.52 

6.15 

3.11 

1.10 

.664

2.41

Run- off

Inches

1.60 

1.58 

1.18

.96 

1.61 

1.68

6.73 

9.54 

4.20 

1.68 

1.00

.91 

1.06 

1.18 

1.57 

1.35 

1.44 

4.02 

8.67 

6.86 

3.58 

1.27 

.74

32.65

Acre-feet

49,000 

48,300 

35,900

29,100 

49,000 

51,500 

20"5,000 

291,000 

128,000 

51,200 

30,600

27,700 

32,300 

36,000 

47,900 

41,300 

44,100 

123,000 

264,000 

209,000 

109,000 

38,600 

22,600

996,000
182 SURFACE WATETS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Priest River at outlet of Priest lake, near Coolin> Idaho Continued

Month

Discharge In second-feet

Maximum Minimum Mean

Per 

square 

mile

Run-off

Inches Acre-feet

1914-15 

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June...............

July...............

August.............

September..........

The year........

1915-16 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1916-17 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1917-18 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1919 

May................

June...............

July...............

August.............

September..........

The period......

735

1,180

980

57S

441

760

2,400

2,400

2,120

1,160

780

408

466

735

58

428

405

446

780

2,120

1,200

780

408

308

567

1,050

764

496

42:

552

1,760

2,240

1,580

939

596

332

0.991

1.84

1.34

.867

.738

.965

3.08

3.92

2.76

1.64

1.04

.580

1.14

2.0

1.54

1.00

.77

1.1

3.44

4.52

3.08

1.89

1.20

.65

2,400 308 943 1.65

418

47S

477

468

1,160

1,680

4,730

5,640

4,730

1,540

655

329

397

389

389

459

1,080

1,720

4,280

1,630

661

454

289

37

447

431

435

70

1,280

3,760

4,810

3,200

999

552

.501

.656

.781

.753

.760

1.24

2.24

6.57

8.41

5.59

1.75

.961

5,640 1,440 2.52

440

7,240

7,240

4,000

980

400

4,140

1,020

418

261

330

250

246

28

296

321

557

3,780

5,910

2,200

621

330

.577

.437

.430

.49.

.517

.561

.974

6.61

10.3

3.85

1.09

.577

7,240 1,260 2.20

258

193

769

611

827

2,350

3,670

2,240

804

548

178

172

178

524

485

875

2,400

2,350

875

538

334

221

184

299

707

567

558

1,570

3,300

3,360

1,400

656

434

.386 

.322 

.523 

1.24 

.991 

.976 

2.74 5. ~"7 

5.87 

2.45 

1.15 

.759

172 1,110 1.94

5,800

5,350

2,400

798

374

3,410

2,570

819

382

222

4,260

3,600

1,420

569

304

7.45

6.29

2.48

.995

.531

22.40

.58

.73

.90

.87

.82

1.43

2.50

7.57

9.38

6.44

2.02

1.08

34.32

.67

.49

.50 '.57

.54

.65

1.09

7.62

11.49

4.44

1.26

.64

29.96

.44

.36

.60

1.43

1.03

1.13

3.06

6.65

6.55

2.82

1.33

.85

26.25

8.59

7.02

2.86

1.15

.59

34,900

62,500

47,000

30,500

23,400

33,900

105,000

138,000

94,000

57,700

36,600

19,800

683,000

17,800

22,300

27,500

26,500

25,000

43,500

76,200

23.1,000

286,000

197,000

61,400

32,800

1,050,000

20,300

14,900

15,100

17,400

16,400

19,700

33,100

232,000

352,000

135,000

38,200

19,600

914,000

13,600 

10,900 

18,400 

43,500 

31,500 

34,300 

93,400 

203,000 

"S00,000 

86,100 

40,300 

25,800

801,000

262,000

214,000

87,300

35,000

18.100

616,000
PEND OREILLE RIVER BASIN 183

Monthly discharge of Prieat River at outlet of Priest Lake, near Coolin, Idaho Continued

Month

Discharge in second-feet

Maximum Minimum Mean

Per 

square 

mile

Run-off

Acre-feet

1919-20

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1920-21 

October....:......

November...........

December..........

January............

February..........

March..............

April..............

May................

June...............

July..............

August.............

September..........

The year........

1921-22 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July..............

August.............

September..........

The year........

1922-23 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1923-24 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

229

285

319

319

319

378

910

3,170

3,050

2,240

814

691

188

288

274

387

950

2,300

834

395

342

209

253

257

298

303

324

562

2,300

2,710

1,450

560

485

0.365

.442

.449

.521

.530

.566

.983

4.02

4.74

2.53

.979

.848

0.42

.49

.52

.60

.57

.65

1.10

4.64

5.29

2.92

1.13

.95

3,170 188 810 1.42 19.28

827

990

990

875

950

6,440

5,960

2,760

788

399

686

558

732

668

808

2,700

2,820

801

421

259

766

737

882

808

806

1,050

2,490

4,400

4,680

1,490

571

308

1.34

1.29

1.54

1.41

1.41

1.84

4.35

7.69

8.18

2.60

1.00

.54

1.54

1.44

1.78

1.63

1.47

2.12

4.85

8.87

9.13

3.00

1.15

.60

6,440 259 1,580 2.76 37.58

330

416

594

558

448

387

1,050

4,800

5,120

1,880

604

374

236

325

395

426

362

346

362

1,070

1,930

620

358

248

263

354

502

464

407

364

554

2,850

3,810

1,060

451

323

.460

.619

.878

.811

.712

.636

.969

4.98

6.66

1.85

.788

.565

.53

.69

1.01

.94

.74

.73

1.08

5.74

7.43

2.13

.91

.63

5,120 236 951 1.66 22.56

358

362

416

564

472

370

4,080

4,080

2,700

830

431

229

285

259

412

358

338

362

2,700

852

444

247

270

324

300

513

. 414

354

994

3,480

3,570

1,580

585

325

.472

.566

.524

.897

.724

.619

1.74

6.08

6.25

2.76

1.02

.568

.54

.63

.60

1.03

.75

.71

1.94

7.01

6.97

3.18

1.18

.63

4,080 229 1,060 25.17

250

261

307

319

580

575

4,220

2,760

938

389

273

219

216

254

254

339

490

438

978

402

280

170

231

234

273

271

493

523

553

3,170

1,740

589

331

214

.404

.409

.477

.474

.862

.914

.967

5.54

3.04

1.03

.579

.374

.47

.46

.55

.55

.93

1.05

1.08

6.39

3.39

1.19

.67

.42

12,900

15,100

15,800

18,300

17,400

19,900

33,400

141,000

161,000

89,200

34,400

28,900

587,000

47,100

43,900

54,200

49,700

44,800

64,600

148,000

271,000

278,000

91,600

35,100

18,300

1,150,000

16,200

21,100

30,900

28,500

22,600

22,400

33,000

175,000

227,000

65,200

27,700

19,200

689,000

16,600

19,300

18,400

31,500

23,000

21,800

59,100

214,000

212,000

97,200

36,000

19,300

768,000

14,200

13,900

16,800

16,700

28,400

32,200

32,900

195,000

104,000

36,200

20,400

12,700

4,220 1701 720 1.26 17.15 523,000
184 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Priest River at outlet of Priest Lake, near Coolln, Idaho Continued

Month

Discharge In second-feet

Maximum

Per 

square 

mile

Run-off

Inches Acre-feet

1924-25 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1925-26 

October............

November...........

December...........

January............

February...........

March..............

April........ ......

May................

June...............

July...............

August.............

September..........

The year........

1926-27 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1927-28 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1928-29 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

248

419

484

542

776

735

4,080

5,570

4,220

2,000

602

262

5,570

190

184

291

291

318

354

2,640

3,080

1,230

522

283

428

3,080

946

803

1,280

703

2,400

4,950

5,410

1,180

5,410

1,570

1,420

1,370

832

571

1,570

2,220

5,250

4,500

1,840

769

370

5,250

276

302

287

240

230

338

796

3,660

3,140

1,680

603

295

17;

258

.368

.479

55

660

710

3,660

2,120

618

276

185

194

386

429

499

717

691

2,690

4,420

3,030

1,140

415

210

0.339 

.675 

.750 

.872 

.25 

.21 

.70 

7.73 

5.30 

L.99 

.726 

.367

0.39

.75

.86

1.01

1.30

1.40

5.24

8.91

5.91

2.29

.84

.41

17; 1,240 2.17 29.31

148 

14; 

192 

244 

258 

258 

310 

1,280 

537 

265 

20 

26

159 

158 

255 

268 

29: 

295 

1,000 

2,180 

807 

391 

241 

330

.278

.276

.446

.469

.510

.516

1.75

3.81

1.41

.684

.423

.577

.32

.31

.51

.54

.53

.59

1.95

4.39

1.57

.79

.49

.64

14; .932

428

598

875

64: 

64;

2,520 

3,270

690

648

1,100

92,

687

671

1,020

3,650

4,480

1,790

564

821

21

13

92

62

20

17

1.78

6.38

7.83

3.13

.986

1.44

1.40

1.26

2.21

1.87

1.25

1.35

1.

7.36

8.74

3.61

1.14

1.61

1,420 2.48 33.79

1,090

1,180

841

571

527

513

1,420

2,220

1,840

803

374

237

1,370

1,280

1,130

678

547

722

1,650

3,870

2,880

1,310

536

296

2.40

2.24

1.98

1.19

.956

1.26

2.88

6.77

5.03

2.29

.937

.517

2.77

2.50

2.28

1.37

1.03

45

3.21

7.80

5.61

2.64

1.08

.58

237 1,360 2.38 32.32

234

254

201

214

214

217

334

868

1,730

620

302

190

263

274

255

225

221

247

409

2,410

2,290

1,060

434

236

.460

.479

.446

.393

.386

.432

.715

4.21

4.00

1.85

.759

.413

.53

.53

.51

.45

.40

.50

.80

4.85

4.46

2.13

.88

.46

11,900

23,000

26,400

30,700

39,800

42,500

160,000

272,000

180,000

70,100

25,500

12,500

894,000

9,780

9,400

15,700

16,500

16,200

18,100

59,500

134,000

48,000

24, 000

14,900

19,600

386,000

42,400

38,600

67,600

56,900

38,200

41,300

60,700

224,000

267,000

110,000

34,700

48,900

1,030,000

84,200

76,200

69,500

41,700

31,500

44,400

98,200

238,000

171,000

80,600

33,000

17,600

986,000

16,200 

16,300 

15,700 

13,800 

12,300 

15,200 

24,300 

148,000 

136,000 

65,200 

26,700 

14,000i

3,660 190 16.50 504,000
PEND OREILLE RIVER BASIN 185

Monthly discharge of Priest River at outlet of Priest Lake, near Coolin, Idaho Continued

Month

Discharge in second-feet

Maximum Minimum Mean square 

mile

Run-off

Inches Acre-feet

1929-30

October......................'.

November......................

December......................

January.......................

February......................

March.........................

April.........................

May...........................

June..........................

July..........................

August........................

September.....................

The year...................

1930-31 

October.......................

November......................

December......................

January.......................

February......................

March.........................

April.........................

May...........................

June..........................

July..........................

August........................

September.....................

The year...................

1931-32 

October.......................

November......................

December......................

January.......................

February......................

March.........................

April.........................

May...........................

June..........................

July..........................

August........................

September.....................

The year...................

1932-33 

October.......................

November......................

December......................

January.......................

February......................

March.........................

April.........................

May...........................

June..........................

July..........................

August........................

September.....................

The year...................

1933-34 

October.......................

November......................

December......................

January.......................

February......................

March.........................

April.........................

May...........................

June..........................

July..........................

August........................

September.....................

The year...................

194

177

224

224

252

407

3,630

3,310

2,000

1,000

435

255

3,630

188

214

204

235

247

606

1,510

4,220

2, £00

1,110

462

195

4,220

189

291

349

371

495

922

3,800

6,890

5,040

2,700

750

394

6,890

308

788

766

590

488

2,630

4,870

5,940

3,790

942

379

5,940

644

820

1,860

1,860

1,360

1,630

5,780

5,690

3,000

996

400

215

165

129

120

159

188

238

439

1,830

1,000

451

261

170

178

156

176

19

226

286

1,400

2,340

1,360

69

35

208

0.311

.273

.308

.337

.39

.500

2.45

4.09

2.38

1.22

.615

.364

0.36

.30

.36

.39

.41

.58

2.73

4.72

2.66

1.41

.71

.41

120 15.04

161

181

181

181

172

241

684

1,610

1,130

467

198

169

175

198

194

197

208

309

1,080

3,310

1,640

733

302

182

.306 

.346 

.339 

.344 

.364 

.540 

1.-89 

5.79 

2.87 

1.28 

.528 

.318

.35 

.39 

.39 

.40 

.38 

.62 

2.11

161 714 1.25 16.96

144

195

251

330

303

573

954

3,880

2,780

770

384

218

162

246

299

351

345

762

2,440

5,600

4,180

1,510

510

283

.283

.430

.523

.614

.603

1.33

4.27

9.79

7.31

2.64

.892

.495

.33

.48

.60

.71

.65

1.53

4.76

11.29

8.16

3.04

1.03

.55

144 1,390 2.43 33.13

178

320

750

590

424

429

499

2,860

3,950

969

370

329

236

527

855

669

481

448

942

3,690

5,120

2,100

615

349

.413

.921

1.49

1.17

.841

.783

1.65

6.45

8.95

3.67

1.08

.610

.90

1.84

7.44

9.99

4.23

1.24

178 1,340 2.34

671

685

1,360

988

996

1,740

3,140

1,020

405

226

140

386

757

1,143

1,622

1,129

1,119

3,445

4,135

1,827

650

299

174

.675

1.32

2.00

2.84

1.97

1.96

6.02

7.23

3.19

1.14

.523

.304

.78

1.47

2.31

3.27

2.05

2.26

6.72

8.34

3.56

1.31

.60

.34

10,900

9,280

10,800

11,900

12,600

17,600

83,300

144,000

80,900

42,700

21,600

12,400

458,000

10,800

11,800

11,900

12,100

11,600

19,000

64,300

204,000

97,600

45,100

18,600

10,800

518,000

9,960

14,600

18,400

21,600

19,800

46,900

145,000

344,000

249,000

92,800

31,400

16,800

1,010,000

14,500

31,400

52,600

41,100

26,700

27,500

56,100

227,000

305,000

129,000

37,800

20,800

970,000

23,740

45,050

70,300

99,710

62,690

68,810

205,000

254,200

108,700

40,000

18,K70

10,350

5,780 140 1,391 2.43 33.01 1,007,000
186 SURFACE WATEES OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Priest River at outlet of Priest Lake,near Coolln, Idaho Continued

Month

Discharge In second-feet

Maximum Minimum square 

mile

Run-off

Inches Acre-feet

1934-35 

October............

November...........

December...........

January............

February...........

March..............

April........... ...

May................

June...............

July...............

August.............

September..........

The year........

1935-36 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1936-37 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1937-38 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

237

671

664

706

720

650

2,360

4,960

5,040

2,350

816

406

136

199

567

537

611

567

573

2,490

2,350

847

415

244

164

491

614

621

677

604

1,084

3,739

3,877

1,534

572

300

0.287

.858

1.07

1.09

1.38

1.06

1.90

6.54

6.78

2.68

1.00

.524

0.33

.96

1.23

1.26

1.23

1.22

2.12

7.54

7.56

3.09

1.15

.58

5,040 136 1,191 2.08 28.27

240

218

253

325

266

291

3,540

4,540

2,900

980

392

227

194

178

212

263

240

243

270

3,000

1,020

401

200

162

216

197

228

301

249

270

1,124

3,890

1,813

679

282

193

.378

.344

.399

.526

.435

.472

1.97

6.80

3.17

1.19

.493

.337

.44

.38

 46

.61

.47

.54

2.20

7.84

3.54

1.37

.57

.38

4,540 162 789 1.38 18.80

167

151

203

200

270

250

940

3,140

3,140

2,100

707

374

141

120

120

172

200

212

233

980

2,160

713

357

266

152

133

152

189

236

224

496

2,258

2,628

1,269

495

333

.266

.233

.266

.330

.413

.392

.867

3.95

4.59

2.22

.865

.582

.31

.26

.31

.38

.43

.45

.97

4.55

5.12

2.56

1.00

.65

3,140 120 716 1.25 11.S

328

1,060

1,060

1,020

902

850

3,780

5,780

5,780

2,300

660

298

263

321

828

835

608

577

850

3,780

2,420

686

302

209

285

611

932

926

754

711

1,797

4,395

4,010

1,338

441

250

.498

1.07

1.63

1.62

1.32

1.24

3.14

7.68

7.01

2.34

.771

.437

.57

1.19

1.88

1.87

1.38

1.43

3.50

8.85

7.82

2.70

.89

.49

10,070

29,240

37,750

38,180

37,580

37,160

64,480

229,900

230,700

94,340

35,150

17,880

862,400

13,310

11,720

13,990

18,520

14,350

16,630

66,900

239,200

107,900

41,730

17,310

11,500

573,100

9,380

7,940

9,350

11,640

13,100

13,800

29,640

136,800

156,400

78,000

30,450

19,800

518,200

17,540

36,350

57,310

56,940

41,900

43,720

106,900

270,200

238,600

82,260

27,140

14,850

5,780 209 1,373 2.40 32.57 993,700
PSND OREILLE RIVER BASIN 187

Yearly discharge of Priest River at outlet of Priest Lake,near CoolIn, Idaho

Year

1914. ..........

1915...........

1917...........

1918...........

1920...........

IQpl

1 QP9

1923...........

1924...........

1925........... 

1926...........

1927. ..........

1 QPQ

1929...........

1930........... 

1931...........

1932...........

1934...........

1 Ct^rr

1938...... ......

Year ending Sept. 30

Discharge In 

seccnd-feet

Mean

1,380 

943 

1,440 

1,260 

1,110

810 

1,580 

951 

1,060 

720

1,240 

533 

1,420 

1,360 

697

633 

714 

1,390 

1,340 

1,391

1,191 

789 

716 

1,373

1,580 

1,085 

533

Per 

square 

mile

2.41 

1.65 

2.52 

2.20 

1.94

1.42 

2.76 

1.66 

1.85 

1.86

2.17 

.932 

2.48 

2.38 

1.22

. 1.11 

1.25 

2.43 

2.34 

2.43

2.08 

1.38 

1.25 

2.40

2.76 

1.90 

.932

Run-off

Inches

32.65 

22.40 

34.32 

29.96 

26.25

19.28 

37.58 

22.56 

25.17 

17.15

29.31 

12.63 

33.79 

32.32 

16.50

15.04 

16.96 

33.13 

31.78 

33.01

28.27 

18.80 

11.99 

32.57

37.58 

25.77 

12.63

Acre-feet

996,000 

683,000 

1,050,000 

914,000 

801,000

58?; 000 

1,150,000 

689,000 

768,000 

523.000

894,000 

386,000 

1,030,000 

986,000 

504,000

458^000 

518,000 

1,010,000 

970,000 

1,007,000

862,400 

573,100 

518,200 

993,700

1,150,000 

786,300 

386,000

Calendar year

Discharge In 

second-feet

Mean

1,440 

837 

1,420 

1,250

949 

1,480 

932 

1,050 

743

1,200 

690 

1,530 

1,110 

673

638 

725 

1,470 

1,400 

1,305

1,139 

772 

'833 

1,282

1,530 

1,081 

638

Per 

square 

mile

2.52 

1.46 

2.48 

2.19

1.66 

2.59 

1.63 

1.84 

1.30

2.10 

1.21 

2.67 

1.94 

1.18

1.12 

1.27 

2.57 

 2.45 

2.28

1»99 

1.35 

1.46 

2,24

2.67 

1.89 

1.12

Run-off

Inches

34.23 

19.88 

33.77 

29.70

22.61 

35.05 

22.10 

24.88 

17.67

28.45 

16.36 

36.47 

26.34 

15.95

15.15 

17.24 

34.95 

33.11 

30.97

27.03 

18.40 

19.75 

30.42

36.47 

25.67 

15.15

Acre-feet

1,040,000 

606,000 

1,030,000 

906,000

689,600 

1,070,000 

675,000 

759,000 

540,000

868,000 

499,000 

1,110,000 

804,000 

486,000

462;006 

526,000 

1,070,000 

1,010,000 

944,900

824,400 

560,700 

602,700 

928,000

1,110,000 

783,100 

462,000

Priest River at Palk's ranch, near Priest River, Idaho

Location.- Staff gage, lat. 48016', long. 116<>52«, In sec. 20, T. 57 N., R. 4 W., at

 FalkIs ranch, 4 miles upstream from West Branch of Priest River, 8 miles north of

Prleat River, and 18 miles downstream from Priest Lake. 

Records available.- Harch 1911 to November 1912. 

Drainage area.- 792 square miles. 

Extremes.- Maximum discharge observed, 6,140 second-feet May 28, 29, 1912. (gage height,

 8.4 feet)} minimum observed, 344 second-feet Oct. 23 to Nov. 5, 1911 (gage height,

2.2 feet) 

Remarks.- No diversion or regulation.

Monthly discharge of Priest River at Palk's ranch, near Priest River, Idaho

Month

1911.

April ..........................

May.......... ..................

1911-12

May......... ...................

July ...........................

1912

November 1-20. . ................

Discharge In second-feet

Maximum

1,180 

2,640 

5,650 

4,360 

2,360 

1,050 

678

_

503 

724 

592 

6,140 

5,520 

1,760 

961 

724

592 

1,260

Minimum

544 

1,200 

2,640 

2,450 

1,050 

588 

509

_

344 

344 

384 

2,560 

1,760 

1,010 

549 

592

465 

507

Mean

739 

1,580 

4,490 

3,670 

1,590 

831 

572

_

398 

453 

515 

4,390 

3,330 

1,330 

758 

637

527 

929

Per 

square 

mill

0.933 

1.99 

5.67 

4.63 

2.01 

1.05 

.722

~

.503 

.572 

.650 

5.54 

4.20 

1.68 

.957 

.804

.665 

1.17

Run-off

Inches

1.04 

2.22 

6.54 

5.17 

2,32 

1.21 

.81

-

.58 

,64 

.75 

6.39 

4.69 

1.94 

1.10 

.90

.77 

.87

Acre-feet

44,000 

94,000 

276 ,000 

218,000 

97,800 

51 ,100 

34,000

815,000

24,500 

27 ,000 

31,700 

270,000 

198,000 

81,800 

46,600 

37,900

32,400 

36,900
188 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Priest River near Priest River, Idaho

Location Water-stage recorder, lat. 48°13', long. 116°55', in HE^SEi sec. 11, T. 56N-, 

R. 5 W., 500 feet downstream from Saddler CreeK, a quarter of a mile downstream from 

Lower West Branch, 2£ miles north of Priest River, and 3^ miles upstream from mouth.

Drainage area.- 902 square miles,

Records available.- October 1930 to September 1938.

Extremes.- Maximum discharge recorded, 8,890 second-feet May 23, 1932 (gage height, 8.03 

feet); minimum recorded, 184 second-feet Jan. 7, 1937 (gage height, 0.54 foot).

RemarKs.- No diversions above station. Some regulation on tributary.

Monthly discharge of Priest River near Priest River, Idaho

Month

1930-31

1931-32

May...........................

The year ...................

1932-33

April.........................

May. ..........................

1933-34

Discharge in second- feet

Maximum

305 

346 

309 

482 

654 

1,250 

2,020 

4,850 

2,920 

1,290 

600 

314

4,850

360 

498

700 

2,300 

5,600 

8,890 

6,320 

3,130 

984 

492

8,890

602 

1,160 

1,300 

1,080 

796

4,320 

6,020 

7,080 

4,460 

1,200 

540

7,080

936 

1,340 

5,010 

3,550 

2,270 

3,070 

6,900 

6,750 

3,430 

1,210 

536 

325

6,900

Minimum

250 

275 

279 

283 

262 

435 

1,100 

2,220 

1,330 

589 

266 

229

229

217 

292

750 

2,500 

5,650 

3,250 

1,020 

492 

343

217

310 

636

796 

596 

583

4,320 

4,600 

1,200 

516 

445

310

450 

882 

860 

2,270 

1,480 

1,710 

3,130 

3,490 

1,240 

548 

325 

255

. 255

Mean

277 

307 

298 

329 

396 

785 

1,550 

3,770 

1,950 

885 

414 

266

940

266 

395 

480 

490 

506 

1,270 

4,180 

7,540 

5,150 

1,860 

677 

406

1,940

414 

896 

1,080 

915 

698 

692 

1,9.00 

4,910 

6,220 

2,500 

803 

487

1,800

535 

1,072 

2,367 

2,742 

1,884 

2,008 

4,452 

4,791 

2,197 

819 

416 

287

1,964

Per 

square 

mile

0.50*1 

,34C 

.330 

.365 

.439 

.8TO 

1.72 

4.18 

2.16 

,981 

.459 

.295

1.04

.295 

.438 

.532 

.543 

.561 

1.41 

4.63 

8.36 

5.71 

2.06 

.751 

.450

2.15

.459 

.993 

1.20 

1.01 

.''74 

.767 

2.11 

5.44 

6.90 

2.77 

.890 

.540

2.00

.593 

1.19 

2.62 

3.04 

2.09 

2.23 

4.94 

5.31 

2.44 

.908 

.461 

.318

2.18

Run- off

Inches

0,35 

.38 

.38 

.42 

.46 

1.00 

1.92 

4.82 

2.41 

1.13 

.55 

.33

14.13

,34 

.49 

.61 

.63 

.60 

1.63 

5.17 

9.64 

6.37 

2.38 

.87 

.50

29.23

.53 

1.11 

1.38 

1.16 

.81 

.88 

2,35 

6.27 

.7.70 

3.19 

1.03 

.60

S7.01

.68

1.33 

3.02 

3.50 

2.18 

2.57 

5.51 

6.12 

2.72 

1.05 

.53 

.35

29,56

Acre-feet

17,000 

18,300 

18,300 

20,200 

22,000 

48,300 

92,200 

232,000 

116,000 

54,400 

25,500 

15,800

680,000

16,400 

23,500 

29,500 

30,100 

29,100 

78,100 

249,000 

464,000 

306 ,000 

114,000 

41 ,600 

24,200

1,410,000

25,500 

53,300 

66,400 

56,300 

38 ,800 

42,500 

113,000 

302,000 

370,000 

154,000 

49,400 

29 ,000

1,300,000

32,910 

63,820 

145,500 

168,600 

104,600 

123,500 

264,900 

294,600 

130,800 

50,370 

25,580 

17,070

1,422,000
PEND OREILLE RIVER BASIN 189

Monthly discharge of Palest River near Priest River, Idaho Continued

Month

Discharge In second-feet

Minimum Mean square 

mile

Run-off

Inches Acre-feet

1934-35

October............

November............

December............

January.............

February...........

March..............

April..............

May.................

June................

July................

August..............

September...........

The year.........

1935-56 October.............

November............

December............

January.............

February............

March...............

April...............

May.................

Jane................

July...............

August.............

September...........

The year.........

1936-37 

October.............

November...........

December............

January.............

February............

March...............

April...............

May................

June...............

July................

August..............

September...........

The year.........

1937-38 

October.............

November...........

December............

January.............

February............

March...............

April..............

May.................

June................

July................

August..............

September...........

The year.........

647

1,070

1,100

1,400

1,160

1,280

3,550

6,150

6,000

2,710

1,000

540

6,150

396

381

427

60S

410

669

4,460

5,570

3,430

1,400

564

381

5,570

277

237

555

343

440

695

2,400

3,940

3,800

2,620

904

571

3,940

462

,080

,560

,840

,420

,890

,700

,960

,800

,720

800

430

242

420

806

650

949

892

1,050

3,620

2,710

1,050

550

348

329

869

892

963

1,045

1,071

2,046

5,111

4,546

1,758

735

425

0.366

.963

.989

1.07

1.16

1.19

2.27

5.67

5.04

1.95

.816

.471

0.42

1.07

1.14

1.25

1.21

1.37

2.53

6.54

5.62

2.25

.94

.53

242 1,651 1.83 24.85

313

322

343

370

370

420

422

3,490

1,240

515

280

265

545

355

372

464

360

538

1,832

4,716

2,169

863

381

307

.38

.364

.412

.514

.399

.596

2.03

5.23

2.40

.957

.422

.340

.44

.44

.48

.59

.43

.69

2.26

6.03

2.68

1.10

.49

.38

265 1,061 i.18 16.01

234

215

212

191

320

399

766

2,200

2,670

918

479

377

253

227

293

284

370

459

1,386

3,144

3,235

1,562

657

445

.280

.252

.325

.315

.410

.509

1.54

3.49

3.59

1.73

.728

.493

.32

.28

.37

.36

.43

.59

1.72

4.02

4.00

1.99

.84

.55

191 1,028 1.14 15.47

382

457

1,190

1,230

983

998

1,750

4,820

2,840

834

435

340

416

1,038

1,435

1,709

1,199

1,728

3,472

5,578

4,714

1,587

579

377

.461

1.15

1.59

1.89

1.55

1.92

5.85

6.18

5.25

1.76

.642

.418

.53

1.28

1.83

2.18

1.38

2.21

4.30

7.12

5.84

2.03

.74

.47

20,260

51,730

54,820

59,210

58,010

65,880

121,700

314,200

270,500

108,100

45,220

25,310

1,195,000

21,190

21,100

22,860

28,550

20,710

33,060

109,000

290,000

129,000

53,080

23,450

18,290

770,300

15,580

13,490

18,010

17,480

20,550

28,240

82 ,500

193,300

192,500

96,040

40,400

26,490

744,600

25,600

61,790

88,260

105,100

66,570

106,300

206,600

343,000

280,500

97,590

35,600

22,430

6,960 340 2.20 1,439,000

Yearly discharge of Priest River near Priest River, Idaho

Year ending Sept. 30

Discharge In 

second-feet

Per

square 

mile

Run-off

Inches Acre-feet

Calendar year

Discharge in 

second-feet

Per 

square 

mile

Inches Acre-feet

1931.

1932.

1933.

1934.

1955.

940

1,940

1,800

1,964

1,651

1.04

2.15

2.00

2.18

1.83

14,13 

29.23 

27.01 

2y.56 

24.85

680,000

1,410,000

1,300,000

1,422,000

1,195,000

961

2,040

1,930

1,805

1,565

1.07

2.26

2.14

2.00

1.74

14.46

30.81

29.02

27.16

23.58

696,000

1,480,000

1,400,000

1,307,000

1,135,000

1936.

1957.

1958.

1,061

1,028

1,988

1.18

1.14

2.20

16.01

15.47

29.91

770,500

744,600

1,439,000

1,036

1,206

1,847

1.15

1.34

2.05

15.62

18.14

27.80

752,200

873,200

1,537,000

527283 0-43-13
190 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Priest River at Priest River, Idaho

Location.- Staff gage, lat. 48°11', long. 116°54', In sec. 24, T. 56 N., R. 5 W-, at

 highway bridge three-quarters of a mile northeast of town of Priest River and 1^ 

miles upstream from mouth. Datum of gage is 2,052.24 feet above mean sea level. 

Drainage area.- 904 square miles. 

Records available.- June 1903 to April 1905, November 1910 to April 1911 (January to

 April 1911 incomplete), May to December 1923, February 1929 to September 1930. 

Extremes.- Maximum discharge observed, 6,300 second-feet Apr. 30, 1904; minimum dis-

 charge, 216 second-feet Nov. 21, 1929.

Remarks.- No diversion above station. Some regulation caused by flash dam on West 

Branch of Priept River.

Month

April

May...........................

September. ....................

April'......... ................

The period. ................

December. .....................

March.

May

May

September .....................

water year 1929-30. ........

Discharge in second-feet

Maximum

4,700 

1,690 

1,080

-

1,080 

1,320 

1,370 

1,120 

950 

1,540 

6,300 

5,920 

5,250 

3,120 

1,240 

675

6,300

545 

835 

718

6,300

740 

1,020 

1,790 

S.,360

_

3,250 

1,980

1,050 

575

-

425 

525 

575

383 

1,020 

1,980

2,130 

758 

431

-

318 

293 

469 

384 

469 

888 

4,300 

3,600 

2,420 

1,210 

583 

327

4,300

Minimum

1,740 

950 

835

-

810 

890 

1,050 

920 

862 

890 

1,160 

4,350 

3,050 

1,240 

675 

530

530

500 

485 

598

485

890 

1,590

860 

860

4,710

1,050 

602 

380

-

335 

315 

335

380 

390 

572 

1,300 

2,130 

791 

431 

301

-

271 

216 

222 

249 

301 

354 

771 

2,020 

1,250 

612 

337 

258

215

Mean

3,060 

1,360 

928

-

978 

1,040 

1,140 

1,010 

930 

1,190 

3,510 

5,330 

4,400 

2,030 

877 

580

1,920

517 

564 

624

1,800

621 

722 

1,340 

1,780

_

1,530 

1,120

5,200 

4,370 

1,820 

782 

459

-

363 

380 

408

382 

571 

958 

2,960 

2,850 

1,290 

587 

358

-

292 

262 

356 

307 

366 

524 

1,840 

2,710 

1,610 

864 

442 

287

824

Per 

square 

mile

3.38 

1.50 

1.03

-

1.08 

1.15 

1.26 

1.12 

1.03 

1.32 

3.88 

5.90 

4.87 

2.25 

.970 

.642

2.12

.572 

.624 

.690

1.99

.687 

.799 

1.48 

1.97

_

1.69 

1.24

5.75 

4.83 

2.01 

.865 

.508

-

.402 

.420 

.451

.423 

.632 

1.06 

3.27 

3.15 

1.43 

^649 

.396

-

.323 

.290 

.394 

.340 

.405 

.580 

2.04 

3.00 

1.78 

.956 

.489 

.317

.912

Run-off

Inches

3.90 

1.73 

1.15

-

1.24 

1.28 

1.45 

1.29 

1.11 

1.52 

4.33 

6.80 

5.43 

2.59 

1.12 

.72

38.88

.66 

.70 

.80

27.07

.79 

.33 

1.71 

2.20

_

.88 

1.43

4.49 

5.39 

2.32 

1.00 

.57

-

.46 

.47 

.52

.03 

.73 

1.18 

3.77 

3.51 

1.65 

.75 

.44

-

.37 

.32 

.45 

.39 

.42 

.67 

2.28 

3.46 

1 . 99

I'.IQ

.56 

.35

12.36

Acre«-feet

188,000 

83,600 

55,200

327,000

60,100 

61,900 

70,100 

62,100 

53,500 

73,200 

209,000 

328,000 

262.000 

125,000 

53,900 

34,500

1,390,000

31,800 

33,600 

38,400

1,300,000

38,200 

40,100 

82,400 

106,000

370,000

42,500 

68,900

217,000 

260,000 

112,000 

48 ,100 

27,300

664,000

22,300 

22,600 

25,100

1,520 

35,100 

57,000 

182,000 

170,000 

79,300 

36,100 

21,300

582,000

18,000 

15,600 

21,900 

18,900 

20,300 

32,200 

109,000 

167,000 

95,800 

53,100 

27,200 

17,100

596,000
SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938 191

SPOKANE RIVER BASIN

Coeur d'Alene River at Prichard, Idaho

Location.- Staff gage, lat. 47°40', long. 115°58', in sec. 20, T. 50 N., R. 4 E., at 

Prichard ranger station, three-eighths of a mile upstream from Prichard Creek and 

half a mile upstream from Prichard.

Records available.- October 1911 to September 1914.

Extremes.- Maximum discharge observed, 7,610 second-feet May 10, 11, 1913 (gage height, 

6.1 feet); minimum observed, 124 second-feet Oct. 23 to Nov. 1, 1911.

Remarks.- No diversion or regulation.

Monthly discharge of North Fork of Coeur d'Alene River at Prichard, Idaho

Month

1911-12 

October 23-31 ..................................

April ..........................................

May. ...........................................

July. ..........................................

The period ..................................

1912-13

March. .........................................

July. ..........................................

1913-14

July. ..........................................

Discharge in second-feet

Maximum

124 

2,340 

335 

1,120 

1,320 

2,040 

5,280 

4,920 

2,320 

610 

250 

340

-

515 

3,490 

560 

1,340 

7,380 

7,610 

3,670 

940 

317 

268

273 

639 

576 

2,180 

730 

3,160 

5,990 

3,500 

730 

296 

164 

414

5,990

Minimum

124 

124 

148 

208 

440 

245 

1,890 

1,870 

470 

193 

145 

192

_

192 

340 

315 

526 

1,140 

2,630 

703 

317 

172 

158

149 

163 

213 

210 

254 

730 

1,120 

730 

354 

164 

131 

126

126

Mean

124 

502 

210 

466 

728 

612 

3,330 

S,850 

1,000 

310 

178 

251

_

262 

1,300 

388 

802 

4,110 

4,680 

1,580 

530 

238 

170

189 

409 

333 

725 

403 

1,600 

3,430 

1,830 

482 

227 

153 

171

830

Run-off 

in 

acre-feet

2,210 

29,900 

12,900 

28,700 

41,900 

37,600 

198,000 

175,000 

59,500 

19,100 

10,900 

14,900

631,000

16,100 

77,400 

23,900 

49,300 

245,000 

288,000 

94,000 

32,600 

14,600 

10,100

11,600 

24,300 

20,500 

44,600 

22,400 

98,400 

204,000 

113,000 

28,700 

14,000 

9,410 

10,200

601,000

Coeur d'Alene River at Enaville, Idaho

Location.- Staff gage, lat. 47°34', long. 116°15', in sec. 30, T. 49 N., R. 2 E., at 

Enaville, half a mile upstream from South Pork of Coeur d'Alene River.

Records available.- March 1911 to April 1913.

Extremes.- Maximum discharge observed, 9,420 second-feet Apr. 12, 1912 (gage height, 

10.7 feet); minimum, 210 second-feet Sept. 29, 30, 1911 (gage height, 2.20 feet).

Remarks.- No diversion or regulation.
192 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Coeur d'Alene River at Enavilla, Idaho

Month

1911 

March 3-31. . ...................................

1911-12 

October 1-28. ..................................

May. ...................... ....

1912

Discharge In second-feet

Maximum

5,810 

8,480 

7,730 

4,270 

1,100 

760 

540

-

315 

2,250 

3,780 

9,420 

7,250 

3,160 

970 

495 

728

810 

5,810 

1,170

-

Minimum

440 

2,850 

2,970 

1,100 

465 

296 

210

-

217 

910 

660 

3,160 

3,520 

850 

495 

240 

360

360 

585 

680

-

Mean

2,790 

4,940 

4,920 

2,220 

705 

436 

389

-

255 

1,840 

1,200 

5,780 

4,850 

1,640 

728 

416 

524

489 

2,210 

921

-

Run- off 

in 

acre-feet

160,000 

294,000 

303,000 

132,000 

43,300 

26,800 

23,100

982,000

14,200 

106,000 

73,800 

344,000 

298,000 

97,600 

44,800 

25,600 

31,200

30,100 

132,000 

56,600

219,000

Coeur d'Alene River near Cataldo, Idaho

Location.- Water-stage recorder, lat. 47°34', long. 116°18', in sec. 26, T. 49 N., R. 1 

E., li miles upstream from Cataldo and 3 miles downstream from South Pork of Coeur 

d'Alene River. Prior to October 1925 staff gage at same site and datum. Datum of 

gage is 2,100.00 feet above mean sea level.

Drainage area.- 1,220 square miles.

Records available.- April 1911 to December 1912, July 1920 to September 1938.

Extremes.- Maximum discharge, 55,300 second-feet Dec, 22 or 23, 1933 (gage height, 56.9 

feet, from high-water mark); minimum, 122 second-feet Dec. 4, 1929; minimum gage 

height, 37.03 feet Sept. 6, 1931.

Remarks.- No diversion or regulation of conseq- ence above station.

Monthly discharge of Coeur d'Alene River near Cataldo, Idaho

Month

1911

July. .........................

1911-12

Discharge in second- feet

Maximum

13,500 

12,200 

6,140 

1,400 

780 

500

_

405 

5,340 

980 

2,910 

4,450 

5,340 

14,400 

12,700 

5,150 

1,400 

610 

1,140

14,400

Minimum

6,980 

3,980 

1,400 

610 

405 

365

-

300 

300 

405 

405 

1,400 

780 

4,290 

5,150 

1,140 

555 

365 

405

300

Mean

10,400 

7,190 

2,820 

901 

555 

430

-

345 

1,120 

636 

1,160 

2,430 

1,600 

8,500 

7,990 

2,520 

837 

483 

594

2,340

Per 

square 

mile

8.52 

5.89 

2.31 

.739 

.455 

.352

-

.283 

.918 

.521 

.951 

1. 99 lisi

6.97 

6.55 

2.07 

.686 

.396 

.4B7

1.92

Run-off

Inches

1.90 

6.79 

2.58 

.85. 

.52 

.39

-

.33 

1.02 

.60 

1.10 

2.15 

1.51 

7.78 

7.55 

2.31 

.79 

.46 

.54

26.14

Acre-feet

124,000 

442,000 

168,000 

55,400 

34,100 

25,600

849,000

21,800 

66,600 

39,100 

71,300 

140,000 

98,400 

506,000 

491,000 

150,000 

51,500 

29,700 

35,300

1,700,000
SPOKANE RIVER BASIN 193

Monthly discharge of Coeur d'Alene River near Cataldo, Idaho Continued

Discharge in second-feet

Maximum Minimum

Per 

square 

mile

Run-off

Inches Acre-feet

1912

October....................... 780

November...................... 7,410

December...................... 1,310

The period.................

1920 

August........................ 585

September..................... ____1,150

The period................. ______

1920-21

October....................... 1,360

November...................... 3,770

December...................... 14,000

January....................... 11,600

February...................... 17,800

March......................... 22,000

April......................... 16,400

May........................... 15,500

June.......................... 4,200

July.......................... 1,220

August........................ 540

September..................... 440

The year................... 22,000

1921-22

October....................... 640

November...................... 1,090

December...................... 18,100

January....................... 910

February...................... 565

March...... .................. 1,820

April......................... 9,720

May........................... 17,600

June.......................... 6,200

July.......................... 1,030

August........................ 565

September...................... _____440

The year................... 18,100

1922-23

October....................... 540

November...................... 540

December...................... 3,000

January....................... 11,600

February...................... 1,080

March......................... 9,470

April......................... 17,000

May........................... 14,900

June.......................... 7,720

July.......................... 1,740

August........................ 885

September..................... _____468

The year................... 17,000

1923-24

October....................... 885

November...................... 1,290

December...................... 1,740

January....................... 1,580

February...................... 11,300

March......................... 3,370

April......................... 8,250

May........................... 15,800

June.......................... 1,580

July.......................... 655

August........................ 465

September..................... ____580

The year................... 15,800

405

665

665

547

2,600

907

0.448

2.13

.743

0.52

2.38

.86

374

312

444

625

.364

.512

.42 

.57

850

565

910

3,120

1,220

3,000

3,910

4,050

1,150

540

375

355

1,070

1,540

1,960

5,010

4,440

6,560

8,200

8,760

2,300

812

470

390

.877

1.26

1.61

4.11

3.64

5.38

6.72

7.18

1.89

.666

.385

.320

1.01

1.41

1.86

4.74

3.79

6.20

7.50

8.28

2.11

.77

.44

.36

355 3,450 2.83 38.47

315

315

850

440

1,580

4,680

1,090

515

335

315

410

488

3,060

635

496

830

4,920

9,230

2,790

728

434

362

.336

.400

2.51

.520

.407

.680

4.03

7.57

2.29

.597

.356

.297

.39

.45

2.89

.60

.42

.78

4.50

8.73

2.56

.69

.41

.33

315 2,040 1.67 22.75

295

335

1,020

885

4,990

3,940

1,740

672

468

380

351

386

686

3,050

616

2,000

9,120

7,720

4,090

1,130

587

398

.288

.316

.562

2.50

.505

1.64

7.48

6.33

3.35

.926

.481

.326

.33

.35

.65

2.88

.53

1.89

8.34

7.30

3.74

1.07

.55

.36

2,520 2.07

400

360

605

2,480

1,500

1,500

1,740

630

400

300

260

460

552

845

551

4,770

2,370

4,990

5,570

1,080

530

358

305

.377

.452

.693

.452

3.91

1.94

4.09

4.57

.885

.434

.293

.250

.43

.50

.80

.52

4.22

2.24

4.56

5.27

.99

.50

.34

.28

33,600

155,000

55,800

244.000

27,300

57,1200

64,500

65,800

91,600

121,000

308,000

247,000

403,000

488,000

539,000

137,000

49,900

28,900

23,200

2,500,000

25,200

29,000

188,000

39,000

27,500

51,000

£93,000

568,000

166,000

44,800

26,700

21,500

1,480,000

21,600

£3,000

42,200

188,000

34,200

123,000

543,000

475,000

243,000

69,500

36,100

23,700

1,820,000

28,300

32,800

52,000

33,900

274,000

146,000

297,000

342,000

64,300

32,600

22,000

18,100

260 1,850 1.52 ).65 1,340,000
194 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Coeur d'Alene River near Cataldo, Idaho Continued

Month

1924-25

July. .........................

1925-26

July. .........................

1926-27

1927-28

1928-29

Discharge in second-feet

Maximum

710 

2,060 

7,270 

8,840 

23,700 

11,300 

21,700 

9,090 

3,380 

1,190 

618 

485

23,700

385 

510 

1,720 

810 

3,960 

5,480 

10,800 

4,780 

1,050 

618 

598 

1,050

10,800

2,010 

11,300 

12,600 

3,120 

6,940 

4,280 

25,800 

15,800 

8,250 

2,010 

709 

1,550

25 , 800

3,450 

16,900 

11,000 

8,440 

2,420 

11,000 

12,600 

14,600 

2,850 

1,060 

520 

367

16,900

640 

1,240 

565 

431

7,060 

10,700 

8,510 

2,330 

882 

446 

402

10,700

Minimum

280 

510 

580 

630 

2,180 

2,080 

5,660 

3,810 

1,260 

590 

410 

320

280

300 

280 

410 

460 

535 

1,990 

1,720 

1,120 

510 

300 

260 

340

260

482 

665 

1,080

1,110 

2,010 

3,450 

6,040 

2,100 

720 

454 

501

454

762 

1,590 

1,200 

1,400 

1,240 

1,200 

3,110 

3,110 

1,060 

515 

359 

317

317

328 

306 

197

£74 

1,650 

2,240 

940 

446 

307 

295

197

Mean

359 

1,020 

1,810 

1,430 

6,770 

4,840 

11,300 

6,740 

2,150 

835 

514 

378

3,140

334 

363 

906 

631 

1,900 

3,290 

5,050 

2,180 

768 

404 

314 

568

1,390

1,050 

1,890 

3,350 

1,700 

2,620 

2,690 

7,970 

9,570 

5,100 

1,210 

542 

839

3,210

1,980 

6,530 

3,720 

2,860 

1,770 

4,910 

5,800 

8,350 

1,710 

735 

422 

339

3,270

449 

563 

370 

305 

276 

1,760 

4,550 

5,560 

1,570 

617 

358 

335

1,400

Per 

square 

mile

0.294 

.836 

1.48 

1.17 

5.55 

3.97 

9.26 

5.52 

1.76 

.684 

.421 

.310

2.57

.274 

.298 

.743 

.517 

1.56 

2.70 

4.14 

1.79 

.630 

.331 

.257 

.466

1.14

.861 

1.55 

2.74 

1.39 

2.15 

2.20 

6.53 

7.84 

4.18 

.992 

.444 

.688

2.63

1.62 

5.35 

3.05 

2.34 

1.45 

4.02 

4.75 

6.84 

1.40 

.602 

.346 

.278

2.68

.368 

.461 

.303 

.C50 

. i* t-6 

1.44 

3.73 

4.56 

1.29 

.506 

.293 

.274

1.15

Run- off

Inches

0.34 

.93 

1.71 

1.35 

5.78 

4.58 

10.33 

6.36 

1.96 

.79 

.49 

.35

34.97

.32 

.33 

.86 

.60 

1.62 

3.11 

4.62 

2.06 

.70 

.38 

.30 

.52

15.42

.99 

1.73 

3.16 

1.60 

2.24 

2.54 

7.29 

9.04 

4.66 

1.14 

.51 

.77

35.67

1.87 

5.97 

3.52 

2.70 

1.56 

4.64 

5.30 

7.89 

1.56 

.69 

.40 

.31

36.41

.42 

.51 

.35 

.29 

.24 

1.66 

4.16 

5.26 

1.44 

.58 

.34 

.31

15.56

Acre-feet

22,100 

60,700 

111,000 

87,900 

376,000 

298,000 

672,000 

414,000 

128,000 

51,300 

31,600 

22,500

2,280,000

20,500 

21,600 

55,700 

38,800 

106,000 

202,000 

300,000 

134,000 

45,700 

24,800 

19,300 

33,800

1,000,000

64,600 

112,000 

206,000 

105,000 

146,000 

165,000 

474,000 

588,000 

303,000 

74,400 

33,300 

49,900

2,320,000

122,000 

389,000 

229,000 

176,000 

102,000 

302,000 

345,000 

513,000 

102,000 

45,200 

25,900 

20,200

2,370,000

27,600 

33,500 

22,800 

18,800 

15,300 

108,000 

271,000 

342,000 

93,400 

37,900 

22,000 

10,900

1,010,000
SPOKANE RIVER BASIN 195

Monthly discharge of Coeur d'Alene River near Cataldo, Idaho Continued

Month

1929-30

July. .........................

1930-31

July..........................

The year ...................

1931-32

April.........................

1932-33

1933-34

Discharge in aecond-feet

Maximum

399 

320 

1,460 

442 

6,280 

6,280 

7,260 

4,220 

2,330 

882 

399 

320

7,260

430 

855 

327 

1,630 

1,970 

10,600 

12,900 

8,830 

1,390 

580 

327 

430

12,900

418 

687 

610 

2,020 

16,000 

9,250 

21,500 

15,500 

6,230 

1,590 

547 

4^8

21,500

605 

6,990 

9,250 

3,830 

977 

4,550 

21,200 

12,900 

16,000 

2,270 

706 

558

21,200

3,110 

9,020 

50,000 

22,200 

5,870 

20,000 

12,200 

3,570 

1,390 

687 

395 

344

50,000

Minimum

289 

172 

141 

165 

280 

1,030 

3,110 

1,740 

940 

410 

266 

228

141

218 

314 

206 

206 

566 

977 

3,570 

1,430 

580 

314 

252 

238

206

266 

246 

201 

399 

463 

1,970 

6,800 

5,020 

1,390 

543 

402 

358

201

340 

511 

700 

880 

650 

769 

3,080 

6,760 

2,380 

693 

462 

442

340

384 

883 

842 

3,570 

2,440 

2,860 

4,110 

1,470 

714 

372 

268 

254

254

Mean

317 

238 

511 

241 

1,530 

2,240 

4,790 

2,570 

1,520 

601 

329 

278

1,260

334 

428 

276 

495 

1,040 

3,420 

6,560 

4,190 

919 

416 

276 

318

1,560

322 

394 

353 

762 

1,980 

4,850 

12,100 

10,900 

3,400 

906 

462 

380

3,060

427 

2,460 

2,350 

1,720 

760 

2,270 

8,820 

9,100 

6,770 

1,280 

571 

485

3,090

871 

2,131 

13,230 

8,323 

4,265 

6,490 

6,336 

2,444 

971 

516 

320 

298

3,862

Per 

square 

mile

0.260 

.195 

' .419 

.198 

1.25 

1.84 

3.93 

2.11 

1.25 

.493 

.270 

.228

1.03

.274 

.351 

.226 

.406 

.852 

2.80 

5.38 

3.43 

.753 

.341 

.226 

.261

1.28

.264 

.323 

.289 

.625 

1.62 

3.98 

9.92 

8.93 

2.79 

.743 

.379 

.311

£.51

.350 

2^02 

1.93 

1.41 

.623 

1.86 

7.23 

7.46 

5.55 

1.05 

.468 

.398

2.53

.714 

1.75 

ID. 8 

6.82 

3.50 

5.32 

5.19 

2.00 

.796 

.423 

.2fi2 

.244

3.17

Run- off

Inches

0.30 

.22 

.48 

.23 

1.30 

2.12 

4.38 

2.43 

1.40 

.57 

.31 

.25

13.99

.32 

.39 

.26 

.47 

.89 

3.23 

6.00 

3.95 

.84 

.39 

.26 

.29

17.29

.30 

.36 

.33 

.72 

1.75 

4.59 

11.07 

10.30 

3.11 

.86 

.44 

.35

34.18

.40 

2.25 

2.22 

1.63 

.65 

2.14 

8.07 

8.60 

6.19 

1.21 

.54 

.44

34.34

.82 

1.95 

12.45 

7.86 

3.64 

6.13 

5.79 

2.31 

.89 

.49 

.30 

.27

42.90

Acre-feet

19,500 

14,200 

31,400 

14,800 

85,000 

138,000 

£85,000 

158,000 

90,400 

37,000 

20,200 

16,500

910,000

20,500 

25,500 

17,000 

30,400 

57,800 

210,000 

390,000 

258,000 

54,700 

25,600 

17,000 

18,900

1,130,000

19,800 

23,400 

21,700 

46,900 

114,000 

298,000 

720,000 

670,000 

202,000 

55,700 

28,400 

22,600

2,220,000

26,300 

146,000 

144,000 

106,000 

42,200 

140,000 

525,000 

560,000 

403,000 

78,700 

35,100 

£8,900

2,240,000

53,560 

126,800 

813,700 

511,800 

236 , 800 

399,100 

377,000 

150,300 

57,780 

31,700 

19,690 

17,740

2,796,000
196 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Coeur d'Alene River near Cataldo, Idaho Continued

Month

1934-35

April.........................

May.... .......................

1935-36

May

1936-37

May...........................

1937-38

July. .........................

Discharge in second-feet

Maximum

3,080 

3,440 

6,320 

5,600 

3,260 

7,590 

13,400 

13,900 

6,140 

1,210 

590 

374

13,900

360 

406 

470 

1,320 

994 

4,400 

21,000 

11,600 

2,860 

886 

415 

365

21,000

306 

275 

1,870 

366 

355 

2,700 

13,700 

16,600 

3,820 

1,350 

709 

458

16,600

422 

4,400 

4,700 

5,690 

1,860 

8,120 

34,800 

12,000 

3,320 

1,020 

488 

500

34,800

Minimum

273 

874 

924 

800 

1,520 

1,500 

2,750 

6,520 

1,220 

560 

365 

300

273

288 

270 

245 

296 

290 

1,000 

800 

2,390 

924 

450 

300 

276

245

270 

210 

225 

240 

220 

328 

2,710 

3,670 

1,510 

554 

372 

328

210

182 

240 

1,070 

1,360 

1,010 

1,580 

2,960 

3,700 

1,050 

500 

311 

280

182

Mean

636 

1,907 

1,857 

2,214 

2,297 

3,004 

7,915 

9,218 

2,721 

808 

462 

330

2,780

324 

338 

317 

550 

383 

2,026 

10,730 

6,296 

1,742 

656 

347 

321

1,997

285 

253 

521 

269 

277 

1,393 

6,437 

8,090 

2,327 

818 

484 

362

1,799

281 

1,531 

2,541 

2,721 

1,278 

3,759 

10,200 

5,846 

1,892 

735 

407 

323

2,628

Per 

square 

mile

0.521 

1.56 

1.52 

1.81 

1.88 

2.46 

6.49 

7.56 

C.23 

.662 

.379 

.270

2.28

.266 

.277 

.260 

.451 

.314 

1.66 

8.80 

5.16- 

1.43 

.538 

.284 

.263

1.64

.234 

.207 

.427 

.220 

.227 

1.14 

5.28 

6.63 

1.91 

.670 

.397 

.297

1.47

.230 

1.25 

2.08 

2.23 

1.05 

3.08 

8.36 

4.79 

1.55 

.602 

.334 

.265

2.15

Run-off

Inches

0.60 

1.74 

1.75 

2.09 

1.96 

2.84 

7.24 

8.72 

2.49 

.76 

.44 

.30

30.93

.31 

.31 

.30 

.52 

.34 

1.91 

9.82 

5.95 

1.60 

.62 

.33 

.29

22.30

.27 

.23 

.49 

.25 

.24 

1.31 

5.89 

7.64 

2.13 

.77 

.46 

.33

20.01

.26 

1.40 

2.40 

2.57 

1.09 

3.55 

9.33 

5.52 

1.73 

.69 

.39 

.30

39.23

Acre-feet

39,090 

113,500 

114,200 

136,100 

127,600 

184,700 

471,000 

566,800 

161,900 

49,690 

28,390 

19,640

2,013,000

19,910 

20,110 

19,510 

33,810 

22,010 

124,600 

638,500 

387,200 

103,600 

40,350 

21,360 

19,100

1,450,000

17,510 

15,050 

32,060 

16,570 

15,370 

85,660 

383,000 

497,400 

138,400 

50,270 

29,770 

21,540

1,303,000

17,260 

91,130 

156,300 

167,300 

70,970 

231,100 

607,000 

359,400 

112,600 

45,200 

25,010 

19,240

1,903,000
SPOKANE RIVER BASIN 197

Yearly discharge of Coeur d'Alene River near Cataldo, Idaho

Year

1 QPl

1 QPP

1924...........

1925... ........

1929. ..........

1930. ..........

1 Q** 1*

1934.. .........

1935.. .........

Year ending Sept. 30

Discharge in 

second-feet

Mean

2,340 

3,450 

2,040 

2,520 

1,850

3,140 

1,390 

3,210 

3,270 

1,400

1,260 

1,560 

3,060 

3,090 

3,862

2,780 

1,997 

1,799 

2,628

3,862 

2,455 

1,260

Per 

square 

mile

1.92 

2.83 

1.67 

2.07 

1.52

2.57 

1.14

2» 63

2.68 

1.15

1.03 

1.28 

2.51 

2.53 

3.17

2.28 

1.64 

1.47 

2.15

3.17 

2.01 

1.03

Run- off

Inches

26.14 

38.47 

22.75 

27.99 

20.65

34.97 

15.42 

35.67 

36.41 

15.56

13.99 

17.29 

34.18 

34.34 

42.90

30.93 

22.30 

20.01 

29.23

4-2.90 

27.33 

13.99

Acre-feet

1,700,000 

2,500,000 

1,480,000 

1,820,000 

1,340,000

2,280,000 

1,000,000 

2,320,000 

2,370,000 

1.010,000

910,000 

1,130,000 

2,220,000 

2,240,000 

2,796,00.0

2,013,000 

1,450,000 

 1,303,000 

1,903,000

2,796,000 

1,778,000 

910,000

Calendar year

Discharge in 

second-feet

Mean

2,500 

3,410 

1,830 

£,550 

1,960

3,010 

1,780 

3,700 

2,360 

1,370

1,250 

1,560 

3,410 

4,020 

2,857

2,494 

2,004 

2,076 

2,385

4,020 

2,449 

1,250

Per 

square 

mile

2.05 

2.80 

1.50 

2.09 

1.61

2.47 

1.46 

3.03 

1.93 

1.12

1.02 

1.28 

2.80 

3.30 

2.34

2.04 

1.64 

1.70 

1.95

3.30 

2.01 

1.02

Run- off

Inches

27.95 

37.92 

20.35 

28 39 

2l! 90

33.50 

19.79 

41.15 

26.33 

15.28

13.96 

17.31 

38.06 

44.69 

31.77

27.76 

22.37 

23.08 

26.54

44.69 

27.27 

13.96

Acre-feet

1,820,000 

2,470,000 

1,320,000 

1,850,000 

1,420,000

2,180,000 

1,290,000 

2,680,000 

1,720,000 

993,000

908,000 

1,130,000 

2,470,000 

2,910,000 

2,069,000

1,805,000 

1,455,000 

1,503,000 

1,727,000

2,910,000 

1,775,000 

908,000

Spokane River at Post Falls, Idaho

Location.- Water-stage recorder, lat. 47°42', long. 116°58', in sec. 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 Farm Co's canal, and 1 mile west of village 

of Post Falls. Zero of gage is 2,000 feet above mean sea level.

Drainage area.- 3,880 square miles.

Records available.- January 1913 to September 1938.

Extremes.- Maximum discharge, 50,100 second-feet Dec. 25, 1933; minimum, 422 second-feet 

Nov. 26, 1935, Oct. 14, 1937; minimum gage height, 65.32 feet Oct. 14, 1937

Remarks.- Records good. Spokane Valley Farms Co.'3 canal diverts water at point 3,300 

feet above station for irrigation. Flow partly regulated by storage and release of 

water at Coeur d'Alene Lake. Monthly figures showing discharge in second-feet per 

square mile and run-off in inches are not published, owing to regulation by Coeur 

d'Alene Lake. The yearly figures represent more nearly the natural flow.

Monthly discharge of Spokane River at Post Falls, Idaho

Month

1912-13 

October. . 

November. 

December. 

January, . 

February. 

March. ... 

April....

June ..... 

July..... 

August . . . 

September

The year

Observed

Discharge in 

second-feet

Maximum

4,880 

5,090 

7,880 

28,700 

31,500 

31,500 

10,400 

1,560 

1,770

31,500

Minimum

2,520 

2,760 

4,290 

8,160 

19,900 

10,400 

1,470 

1,380 

1,300

1,300

Mean

3,918 

3,706 

5,648 

19,560 

25,640 

20,780 

4,542 

1,479 

1,409

-

Run- off 

in 

acre-feet

240,893 

205,825 

347,286 

1,164,139 

1,576,264 

1,236,496 

279 , 293 

 90,922 

83,861

-

Diversion 

through 

Spokane 

Valley 

Farms 

Co's Canal 

(acre-feet)

2,757 

2,618 

2,580 

2,370 

2,287 

2,868 

3,582 

4,276 

4,165 

4,304 

4,304 

3,929

40,040

Adjusted for diversion

Run- off 

in 

acre-feet

124,000 

240,000 

216,000 

243,263 

208,112 

350,154 

1,167,721 

1,580,540 

1,240,661 

283,597 

95,226 

87,790

5,837,064

Discharge in 

second-feet

Mean

2,020 

4,030 

3,510 

3,956 

3,747 

5,695 

19,620 

25,710 

20,850 

4,612 

1,549 

1,475

8,060

Per 

square 

mile

-

2.08

Runoff 

in 

inches

-

28.24
198 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Spokane River at Post Palls, Idaho Continued

Month

1913-14 

October. . 

November. 

December. 

January, . 

February. 

March. . . . 

April .... 

May......

August. . . 

September

The year

1914-15 

October. . 

November . 

December. 

January. . 

February, 

torch. . . . 

April.... 

May......

August... 

September

The year

1915-16 

October. . 

November. 

December. 

January . . 

February. 

March. . . . 

April....

July.....

August. . . 

September

The year

1916-17 

October.. 

November. 

December. 

January. . 

February. 

March. . . . 

April.... 

May. .....

August. . . 

September

The year

1917-18 

October. . 

November. 

December. 

January. . 

February. 

March. ... 

April....

June ..... 

July..... 

August. . . 

September

The year

Observed

Discharge In 

second-feet

Maximum

4,900 

5,290 

4,170 

7,490 

6,780 

15,500 

20,600 

17,600 

7,740 

2,240 

1,560 

1,660

20,600

1,660 

5,090 

4,710 

2,770 

1,770 

10,100 

11,900 

11,500 

9,290 

2,770 

1,770 

1,560

11,900

1,560 

2,570 

5,050 

4,710 

7,490 

25,200 

25,600 

27,900 

19,800 

16,600 

2,240 

1,560

27,900

1,560 

2,120 

1,880 

1,880 

5,550 

5,670 

25,200 

39,800 

37,000 

15,700 

2,410 

2,040

59,800

1,980 

1,750 

29,200 

39,200 

10,700 

15,100 

19,400 

19,400 

11,000 

2,390 

1,420 

1,520

59,200

Minimum

1,580 

1,560 

1,500 

1,560 

5,200 

6,780 

2,240 

8,760 

1,470 

1,220 

1,080 

884

884

875 

920 

1,300 

1,150 

970 

1,150 

8,240 

1,770 

1,880 

1,380 

1,580 

1,580

875

1,220 

1,580 

2,000 

2,120 

2,770 

5,900 

19,500 

18,000 

16,900 

2,570 

1,560 

1,470

1,220

1,580 

1,580 

1,660 

1,770 

1,770 

2,000 

5,050 

25,200 

16,500 

2,280 

1,920 

1,700

1,380

1,420 

960 

960 

10,400 

6,210 

5,070 

14,700 

11,300 

1,620 

1,090 

1,090 

1,090

960

Mean

2,525 

5,595 

2,274 

2,700 

5,308 

10,010 

16,260 

15,210 

4,522 

1,515 

1,386 

1,198

5,517

1,224 

4,126 

5,128 

1,748 

1,508 

5,469 

10,870 

6,675 

4,525 

2,055 

1,555 

1,488

5,666

1,445 

1,521 

2,182 

2,572 

5,028 

14,520 

21,450 

22,280 

18,270 

10,720 

1,678 

1,527

8,579

1,490 

1,752 

1,798 

1,862 

2,676 

2,652 

14,110 

51,750 

25,570 

5,885 

2,153 

1,841

7,801

1,610 

1,328 

6,545 

25,550 

8,849 

7,568 

17,190 

15,850 

7,547 

1,586 

1,212 

1,258

7,806

Run-off 

in 

acre-feet

142,850 

213,779 

139,795 

166,017 

294,805 

615,215 

967,756 

955,506 

269,098 

95,124 

85,210 

71,294

5,994,205

75,245 

245,554 

192,557 

107,504 

72,655 

556,258 

646,572 

410,400 

257,555 

126,248 

95,625 

88,542

2,654,291

88,840 

90,486 

154,142 

158,122 

289,250 

880,564 

1,276,165 

1,570,182 

1,087,140 

659,068 

105,180 

90,865

6,227,782

91,656 

105,061 

110,579 

114,506 

148,621 

163,061 

839,782 

1,952,531 

1,521,322 

561,864 

151,167 

109,547

5,647,477

99,015 

79,002 

 590,010 

1,447,954 

491,445 

465,542 

1,022,678 

975,091 

457,157 

97,527 

74,519 

73,666

5,651,386

Diversion 

through 

Spokane 

Valley 

Farms 

Go's Canal 

(acre-feet]

3,745 

2,977 

5,205 

5,507 

5,229 

5,858 

4,510 

4,755 

4,582 

4,735 

4,735 

4,580

48,174

2,757 

2,265 

2,152 

2,077 

1,745 

2,555 

5,552 

4,481 

5,236 

5,411 

5,578 

5,579

42,766

2,287 

2,777 

2,616 

1,501 

1,587 

3,537 

4,272 

5,712 

5,984 

5,873 

6,186 

4,677

47,009

5,596 

2,548 

1,722 

0 

2,259 

2,558 

2,554 

5,096 

6,141 

7,160 

5,978 

3,660

42,652

3,074 

2,580 

2,460 

1,845 

2,221 

5,074 

5,570 

5,554 

6,545 

7,579 

6,764 

4,165

49,011

Adjusted for diversion

Run- off 

in 

acre-feet

146,575 

216,756 

142,998 

169,524 

298,032 

619,051 

972,046 

940,041 

273,680 

97,859 

89,945 

75,874

4,042,579

78,000 

247,799 

194,509 

109,581 

74,400 

358,591 

649,924 

414,881 

262,591 

151,659 

101,201 

95,921

2,697,057

91,127 

95,265 

156,758 

159,625 

290,817 

885,901 

1,280,437 

1,375,894 

1,095,124 

664,941 

109,566 

95,540

6,274,791

95,252 

105,409 

112,501 

114,506 

150,860 

165,419 

842,136 

1,957,427 

1,527,463 

369,024 

137,145 

115,207

5,690,129

102,089 

81,582 

592,470 

1,449,779 

495,666 

468,416 

1,026,248 

978,625 

445,702 

104,906 

81,285 

77,851

5,700,597

Discharge in 

second-feet

Mean

2,584 

5,645 

2,526 

2,757 

5,566 

10,070 

16,550 

15,290 

4,599 

1,592 

1,465 

1,275

5,584

1,269 

4,164 

3,165 

1,782 

1,559 

5,507 

10,950 

6,748 

4,415 

2,141 

1,646 

1,578

3,725

1,482 

1,568 

2,224 

2,596 

5,056 

14,380 

21,520 

22,370 

18,570 

10,820 

1,779 

1,606

8,644

1,548 

1,772 

1,826 

1,862 

2,716 

2,690 

14,150 

51,850 

25,670 

6,001 

2,230 

1,902

7,860

1,660 

1,368 

6,585 

25,580 

8,889 

7,618 

17,250 

15,920 

7,457 

1,706 

1,522 

1,508

7,874

Per 

square 

mile

-

1.44

-

.960

-

2.25

-

2.05

-

2.05

Runoff 

in 

inches

-

19.54

-

15.05

-

50.55

-

27.55

-

27.55
SPOKANE RIVER BASIN 199

Monthly discharge of Spokane River at Post Palls, Idaho Continued

Month

1918-19 

October. . 

November. 

December. 

January, . 

February. 

March. . . . 

April....

June .....

August.. . 

September

The year

1919-20 

October. . 

November. 

December. 

January. . 

February. 

March. . . . 

April....

August. . . 

September

The year

1920-21 

October. . 

November. 

December. 

January. . 

February. 

March. ... 

April....

August. . . 

September

The year

1921-22 

October. . 

November . 

December. 

January. . 

February. 

March .... 

April....

July.....

August . . . 

September

The year

1922-23 

October. . 

November. 

December. 

January. . 

February. 

March. ... 

April....

June ..... 

July..... 

August... 

September

The year

Observed

Discharge In 

second-feet

Maximum

1,850 

2,110 

7,050 

14,400 

11,600 

13,800 

24,500 

25,800 

16,100 

3,120 

1,520 

1,330

25,800

1,240 

1,330 

1,330 

1,420 

4,130 

11,300 

13,100 

19,400 

12,800 

4,500 

1,420 

1,420

19,400

4,310 

8,380 

8,280 

13,700 

13,300 

18,800 

20,200 

25,400 

19,200 

4,240 

1,320 

1,160

85,400

3,380 

8,820 

4,550 

1,540 

4,210 

14,100 

24,900 

18,800 

4,080 

1,080 

1,040

24,900

1,200 

1,530 

3,040 

9,920 

4,310 

7,000 

80,000 

21,000 

17,400 

5,930 

1,400

21,000

Minimum

1,160 

1,240 

1,850 

1,420 

2,110 

5,070 

14,400 

16,100 

2,390 

1,330 

1,020 

1,020

1,020

960 

1,090 

1,090 

1,160 

1,240 

1,240 

5,070 

12,500 

2,820 

860 

1,020 

960

860

960 

1,090 

\,650 

6,160 

4,420 

9,560 

14,100 

17,400 

1,840 

940 

1,020 

940

940

990

4,780 

1,190 

1,080 

1,380 

4,550 

14,100 

1,330 

930 

908 

908

908

951 

1,220 

1,090 

3,540

2,210 

9,000 

16,200 

3,500 

918 

878

878

Mean

1,284 

1,763 

3,601 

5,174 

5,842 

7,995 

19,800 

19,160 

7,575 

1,701 

1,177 

1,127

6,341

1,141 

1,155 

1,225 

1,266 

1,967 

5,663 

9,737 

15,650 

7,907 

1,730 

1,225 

1,101

4,150

2,501 

3,852 

4,213 

9,675 

8,725 

13,980 

16,530 

21,880 

10,090 

1,428 

1,154 

1,054

7,918

1,115 

1,547 

6,422 

2,217 

1,268 

2,284 

10,350 

19,590 

11,780 

1,316 

992 

973

-5,005

1,034 

1,347 

1,565 

6,773 

2,368 

3,410 

15,870 

19,000 

13,420 

2,249 

1,070 

1,272

5,785

Run-off 

In 

acre-feet

78,962 

104,926 

221,435 

318,129 

324,456 

491,583 

1,178,380 

1,177,983 

450,764 

104,588 

72,357 

67,061

4,590,624

70,155 

68,727 

75,352 

77,871 

113,137 

348,198 

579,412 

962,380 

470,479 

106,354 

75,332 

65,494

3,012,891

153,798 

229,210 

259,061 

594,902 

484,542 

859,557 

983,802 

1,345,587 

600,655 

87,828 

70,969 

62,737

5,732,648

68,549 

92,033 

394,889 

136,304 

70,413 

140,430 

615,689 

1,204,364 

701,117 

80,896 

60,978 

57,900

3,623,562

63,594 

80,152 

96,238 

416,430 

131,484 

209,693 

944,132 

1,168,066 

798,347 

138,313 

65,802 

75,669

4,187,920

Diversion 

through 

Spokane 

Valley 

Farms 

Go's Canal 

(acre-feet)

3,074 

2,380 

2,460 

1,845 

2,221 

3,074 

3,570 

5,534 

7,140 

7,993 

7,379 

«4,707

»51,377

3,257 

2,293 

405 

0 

0 

2,886 

4,159 

5,933 

7,232 

8,265 

7,876 

3,578

45,884

2,577 

2,289 

1,926 

2,025 

1,607 

1,664 

2,055 

3,719 

8,856 

8,793 

8,182 

5,349

49,042

2,418 

1,204 

813 

0 

0 

0 

1,452 

5,724 

8,592 

9,501 

8,626 

4,915-

43,245

2,323 

845 

0 

0 

0 

0 

0 

1,751 

10,703 

13,730 

12,490 

5,377

47,219

Adjusted for diversion

Run- off 

In 

acre-feet

82,036 

107,306 

223,895 

319,974 

326,677 

494,657 

1,181,950 

1,183,517 

457,904 

112,581 

79,736 

71,768

«4, 642, 001

73,412 

71,020 

75,757 

77,871 

113,137 

351,084 

583,571 

968,313 

477,711 

114,619 

83,208 

69,072

3,058,775

156,375 

231,499 

260,987 

596,927 

486,149 

861,221 

985,857 

1,349,306 

609,511 

96,621 

79,151 

68,086

5,781,690

70,967 

93,237 

395,702 

136,304 

70,413 

140,430 

617,141 

1,210,088 

709,709 

90,397 

69,604 

62,815

3,666,807

65,917 

80,997 

96,238 

416,430 

131,484 

209,693 

944,132 

1,169,817 

809,050 

152,043 

78,292 

81,046

4,235,139

Discharge in 

second-feet

Mean

1,334 

1,803 

3,641 

5,204 

5,882 

8,045 

19,860 

19,250 

7,695 

1,831 

1,297 

1,206

»6,412

1,194 

1,194 

1,232 

1,266 

1,967 

5,710 

9,807 

15,750 

8,029 

1,864 

1,353 

1,161

4,213

2,543 

3,890 

4,244 

9,708 

8,754 

14,010 

16,560 

21,940 

10,240 

1,571 

1,287 

1,144

7,986

1,154 

1,567 

6,435 

2,217 

1,268 

2,284 

10,370 

19,680 

11,920 

1,471 

1,132 

1,056

5,065

1,072 

1,361 

1,565 

6,773 

2,368 

3,410 

15,870 

19,030 

15,600 

2,472 

1,273 

1,362

5,850

Per 

square 

mile

"

1.65

-

1.09

-

2.06

-

1.31

-

1.51

Runoff 

In 

Inches

-

22.39

-

14.83

-

27.95

-

17.78

-

20.49

» Previously published In error.
200 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Spokane River at Post Palls, Idaho Continued

Month

1923-24

October 

November. 

December. 

January, . 

February. 

March. . . . 

April....

August . . . 

September

The year

1924-25 

October.. 

November. 

December. 

January. . 

February. 

March. . . . 

April....

August ... 

September

The year

1925-26 

October. . 

November. 

December. 

January. . 

February. 

March. ... 

April.... 

May

August . . . 

September

The year

1926-27 

October.. 

November. 

December. 

January. . 

February. 

March. . . . 

April....

August. . . 

September

The year

1927-28 

October. . 

November . 

December. 

January. . 

February. 

March. . . . 

April.... 

May......

June ..... 

July..... 

August. .. 

September

The year

Observed

Di scharge in 

second-feet

Maximum

1,.220

5,230 

2,660 

12,600 

9,170 

12,000 

17,400 

4,340 

1,480 

1,380 

1,090

17,400

1,080 

6,760 

8,790 

6,930 

22,800 

12,700 

30,600 

20,000 

15,800 

2,680 

1,710 

1,410

30,600

1,520 

1,580 

2,450 

3,440 

7,540 

8,520 

14,800 

13,100 

2,110 

1,880 

1,480 

1,420

14,800

4,180 

10,400 

16,200 

6,710

23,800 

27,900 

21,400 

9,290 

1,740

27,900

9,970 

22,400 

23,300 

12,900 

7,390 

17,400 

19,600 

26,300 

18,900 

2,740 

1,190 

1,120

26,300

Minimum

943 

1,140 

1,160 

1,440 

4,700 

1,890 

2,050 

3,670 

1,050 

980 

950 

895

895

845 

870 

1,340

8,790 

7,920 

13,100 

16,600 

2,680 

840 

1,190 

1,130

840

1,000 

1,030 

1,010 

1,260 

2,840 

5,930 

6,470 

1,590 

1..320 

1,080 

672 

630

630

1,140 

2,440 

4,100 

2,280 

3,910 

7,610 

9,080 

20,000 

11,000 

1,150 

1,310 

1,150

1,140

1,660 

4,200 

6,660 

4,940 

3,550 

1,890 

12,400 

18,200 

2,060 

1,090 

813 

853

813

Mean

1,100 

1,375 

2,330 

1,726 

9,918 

6,488 

7,962 

14,540 

2,419 

1,179 

1,149 

974

4,244

948 

1,949 

4,974 

3,785 

14,660 

10,190 

23,180 

19,070 

8,321 

1,412 

1,493 

1,276

7,535

1,228 

1,168 

1,377 

2,027 

5,940 

7,145 

10,150 

6,625 

1,584 

1,463 

991 

1,006

3,370

1,743 

4,605 

10,400 

4,965 

7,035 

8,730 

12,180 

23,850 

17,610 

2,560 

1,580 

1,424

8,057

5,460 

13,130 

14,920 

8,732 

6,220 

10,930 

15,230 

22,620 

7,806 

1,524 

1,003 

913

9,053

Run-off 

in 

acre-feet

67,638 

81,818 

143,266 

106,155 

570,486 

398,916 

473,792 

894,110 

143,921 

72,476 

70,669 

57,969

3,081,216

58,264 

115,974 

305,812 

232,701 

814,393 

626,261 

1,379,107 

1,172,826 

495,134 

86,803 

91,815 

75,907

5,454,997

75,491 

69,501 

84,655 

124,661 

329,911 

439,359 

604,007 

407,345 

94,255 

89,970 

60,944 

59,867

2,439,966

107,147 

274,036 

639,749 

305,316 

390,704 

536,807 

725,058 

1,466,578 

1,048,066 

157,408 

97,150 

84,734

5,832,753

335,702 

781,190 

917,355 

536,906 

357,778 

672,178 

906,248 

1,390,810 

464,509 

93,719 

61,644 

54,309

6,572,348

Diversion 

through 

Spokane 

Valley 

Farms 

Go's Canal 

(acre-feet]

871 

0 

0 

0 

0 

0 

4,838 

11,564 

14,146 

14,221 

13,609 

5,629

64,878

0 

0 

0 

0 

0 

0 

6,278 

11,213 

11,284 

15,481 

14,815 

6,668

65,739

0

0 o

0 

0 

2,473 

8,269 

13,301 

14,634 

14,414 

14,051 

5,580

72,722

0 

0 

0 

0 

0 

3,471 

5,496 

9,921 

14,364 

14,705 

15,068 

5,373

68,398

0 

0 

0 

0 

0 

575 

4,013 

11,671 

14,864 

15,624 

14,214 

6,129

67,090

Adjusted for diversion

Run- off 

In 

acre-feet

68,509 

81,818 

143,266 

106,155 

570,486 

398,916 

478,630 

905,674 

158,067 

86,697 

84,278 

63,598

3,146,094

58,264 

115,974 

305,812 

232,701 

814,393 

626,261 

1,385,385 

1,184,039 

506,418 

102,284 

106,630 

82,575

5,520,736

75,491 

69,501 

84,655 

124,661 

329,911 

441,832 

612,276 

420,646 

108,889 

104,384 

74,995 

65,447

2,512,688

107,147 

274,036 

639,749 

305,316 

390,704 

540,278 

730,554 

1,476,499 

1,062,430 

172,113 

112,218 

90,107

5,901,151

335,702 

781,190 

917,355 

536,906 

357,778 

672,753 

910,261 

1,402,481 

479,373 

109,343 

75,858 

60,438

6,639,438

Discharge in 

second-feet

Mean

1,114 

1,375 

2,330 

1,726 

9,918 

6,488 

8,043 

14,730 

2,657 

1,410 

1,370 

1,069

4,334

948 

1,949 

4,974 

3,785 

14,660 

10,190 

23,290 

19,250 

8,511 

1,664 

1,734 

1,338

7,626

1,228 

1,168 

1,377 

2,027 

5,940 

7,185 

10,290 

6,841 

1,830 

1,697 

1,220 

1,100

3,471

1,743 

4,605 

10,400 

4,965 

7,035 

8,786 

12,270 

24,010 

17,850 

2,799 

1,825 

1,514

8,151

5,460 

13,100 

14,900 

8,730 

6,220 

10,940 

15,300 

22,810 

8,056 

1,778 

1,234 

1,016

9,146

Per 

square 

mile

-

1.12

"

1.97

-

.895

-

2.10

-

2.36

Runoff 

In 

Inches

"

15.24

-

26.73

-

12.15

-

28.50

-

32.12
SPOKANE RIVER BASIN 201

Monthly discharge of Spokane River at Post Falls, Idaho Continued

Month

1928-29 

October.. . 

November. 

December. 

January,. 

February, 

(larch. . . . 

April....

July..... 

August. . . 

September

The year

1929-30 

October. . 

November . 

December. 

January. . 

February. 

March. . . . 

April.... 

May......

August. . . 

September

The year

1930-31 

October. . 

November. 

December. 

January. . 

February. 

March. ... 

April....

August. . . 

September

The year

1931-32 

October. . 

November. 

December. 

January.. 

February. 

March. . . . 

April....

August. . . 

September

The year

1932-33 

October.. 

November . 

December. 

January . . 

February. 

March. . . . 

April.... 

May

June ..... 

July..... 

August. . . 

September

The year

Observed

Discharge in 

second-feet

Maximum

1,320 

1,320 

1,650 

1,420 

1,110 

8,000 

12,600 

14,000 

10,700 

2,450 

1,590 

1,530

14,000

1,230 

1,320 

1,150 

1,650 

6,910 

10,200 

12,000 

11,300 

6,250 

1,840 

1,230 

1,190

12,000

1,110 

1,110 

1,190 

1,190 

4,320 

12,000 

15,600 

14,800 

3,500 

1,070 

1,420 

1,280

15,600

1,370 

965 

965 

4,320 

8,900 

16,400 

28,900 

32,400 

21,300 

3,310 

965 

965

32,400

1,150 

9,450 

8,900 

7,450 

3,400 

9,550 

27 , 400 

28,900 

27 , 000 

11,700 

1,040 

1,150

28 , 900

Minimum

820 

965 

795 

900

1,040 

3,400 

11,300 

1,780 

795 

770 

1,070

770

820 

900 

845 

900 

965 

2,040 

10,200 

3,830 

1,370 

770 

965 

1,000

770

900 

900 

965 

930 

930 

1,910 

10,900 

3,500 

1,000 

820 

820 

820

820

820 

795 

900 

1,190 

1,480 

7,830 

17,300 

22,700 

2,820 

930 

795 

795

795

820 

795 

1,150 

1,650 

1,480 

1,910 

9,880 

20,000 

12,400 

845 

795 

770

770

Mean

1,097 

1,149 

1,189 

1,087 

1,025 

1,751 

7,065 

13,090 

5,059 

1,187 

1,113 

1,242

3,014

960 

972 

935 

1,307 

2,487 

3,873 

11,270 

7,055 

3,531 

1,018 

1,108 

1,071

2,956

1,020 

965 

1,015 

996 

1,913 

6,776 

13,550 

11,000 

2,005 

935 

1,072 

1,023

3,526

1,045 

882 

910 

2,582 

2,430 

11,790 

23,770 

28,990 

12,500 

1,643 

847 

848

7,356

988 

4,931 

4,667 

4,533 

2,483 

5,588 

14,210 

22,670 

21,830 

3,119 

839 

916

7,234

Run- off 

in 

acre- feet

67,448 

68,390 

73,121 

66,843 

56,906 

107,683 

420,397 

805,091 

301,051 

72,982 

68,430 

73,924

2,182,266

59,018 

57,828 

57,461 

80,370 

138,129 

238,155 

670,810 

433,825 

210,129 

62,588 

68,142 

63,729

2,140,184

62,698 

57,441 

62,400 

61,260 

106,255 

416,628 

806,083 

676,185 

119,286 

57,471 

65,940 

60,883

2,552,530

64,225 

52,512 

55, 964

158,737 

139,755 

725,038 

1,414,215 

1,782,347 

743,881 

101,048 

52,066 

50,489

5,340,277

60,744 

293,415 

286,988 

278,717 

137,891 

343,577 

845,712 

1,393,587 

1,298,777 

191,792 

51,560 

54,496

5,237,256

Diversion 

through 

Spokane 

Valley 

Farms 

Co. 's Canal 

(acre-feet!

0 

0 

0 

0 

0 

0 

1,311 

9,376 

12,403 

12,833 

13,583 

5,591

55,097

0 

0 

0 

0 

0 

436 

6,785 

12,004 

12,014 

13,069 

14,396 

5,691

64,395

0 

0 

0 

0 

0 

561 

5,161 

12,821 

14,221 

15,070 

15,606 

6,405

69,845

0 

0 

0 

0 

0 

0 

1,341 

10,631 

14,918 

15,642 

14,820 

7,902

65,254

0 

0 

0 

0 

0 

964 

4,340 

13,170 

14,824 

13,609 

14,731 

7,095

68,733

Adjusted for diversion

Run- off 

in 

acre-feet

67,448 

68,390 

73,121 

66,843 

56,906 

107,683 

421,708 

814,467 

313,454 

85,815 

82,013 

79,515

2,237,363

59,018 

57,828 

57,461 

80,370 

138,129 

238,591 

677,595 

445,829 

222,143 

75,657 

82,538 

69,420

2,204,579

62,698 

57,441 

62,400 

61,260 

106,255 

417,189 

811,244 

689,006 

133,507 

72,541 

81,546 

67,288

2,622,375

64,225 

52,512 

55,964 

158,737 

139,755 

725,038 

1,415,556 

1,792,978 

758,799 

116,690 

66,886 

58,391

5,405,531

60.744 

293,415 

286,988 

278,717 

137,891 

344,541 

850,052 

1,406,757 

1,313,601 

205,401 

66,291 

61,591

5,305,989

Discharge in 

second-feet

Mean

1,097 

1,149 

1,189 

1,087 

1,025 

1,751 

7,087 

13,240 

5,267 

1,396 

1,334 

1,336

3,090

960 

972 

935 

1,310 

2,490 

3,880 

11,380 

7,250 

3,733 

1,231 

1,342 

1,167

3,045

1,020 

965 

1,010 

996 

1,910 

6,785 

13,640 

11,210 

2,244 

1,180 

1,326 

1,131

3,622

1,045 

882 

910 

2,582 

2,430 

11,790 

23,790 

29,160 

12,750 

1,897 

1,088 

981

7,446

988 

4,930 

4,670 

4,530 

2,480 

5,604 

14,280 

22,880 

22,080 

3,340 

1,079 

1,035

7,329

Per 

square 

mile

-

0.796

-

.785

"

.934

-

1.92

-

1.89

Runoff 

in 

inches

-

10.80

-

10.65

-

12.67

-

26.13

-

25.65
202 SURFACE WATEFS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of Spokane River at Post Falls, Idaho Continued

Month

1933-34 

October., . 

November. 

December. 

January, . 

February, 

larch. . . . 

April....

August. . . 

September

The year

1934-35 

October.. 

November . 

December. 

January. . 

February, 

larch. . . . 

April....

Mfl-v

Vugust. . . 

September

The year

1935-36 

October. . 

November . 

December. 

January. . 

February. 

March.... 

April....

August. . . 

September

The year

1936-37 

October. . 

November . 

December. 

January. . 

February. 

March. . . . 

April....

Mfi*v

August. . . 

September

The year

1937-38 

October. . 

November. 

December. 

January . . 

February. 

March. . . . 

April....

June ..... 

July. .... 

August. . . 

September

The year

Observed

Discharge in 

second- feet

Maximum

8,290 

12,000 

49,800 

33,500 

19,800 

20,400 

26,300 

17,000 

4,880 

1,190 

989 

948

49,800

1,070 

6,320 

8,010 

7,550 

7,550 

11,100 

23,800 

25,500 

19,500 

2,960 

1,400 

1,450

25,500

1,430 

920 

1,000 

2,610 

2,280 

7,780 

35,400 

31,700 

11,700 

2,000 

1,380 

1,430

35,400

1,520 

1,000 

998 

1,700 

1,300 

5,260 

18,600 

23,100 

15,400 

3,220 

1,300 

1,470

23,100

1,600 

7,780 

8,730 

9,740 

6,430 

13,600 

33,500 

27,300 

15,100 

2,340 

1,220 

1,340

33,500

Minimum

965 

2,170 

2,040 

17,700 

9,220 

8,900 

17,400 

3,500 

745 

720 

610 

632

610

626 

1,030 

906 

3,820 

5,260 

4,000 

7,780 

20,200 

1,810 

782 

808 

1,000

626

840 

452 

566 

636 

1,520 

1,380 

3,220 

12,300 

920 

629 

746 

906

452

1,080 

584 

648 

820 

850 

1,100 

6,000 

16,200 

3,060 

733 

726 

990

584

596 

1,000 

2,100 

2,830 

2,680 

4,090 

8,850 

15,400 

1,190 

778 

610 

899

596

Mean

2,720 

6,537 

23,660 

24,930 

13,750 

12,730 

21,170 

9,156 

2,113 

914 

822 

721

9,929

793 

4,113 

4,355 

5,470 

6,517 

7,888 

14,670 

23,050 

9,810 

1,453 

1,004 

1,246

6,691

1,055 

627 

784 

1,632 

1,972 

5,773 

16,980 

21 , 990 

5,249 

1,059 

1,070 

1,151

4,950

1,375 

787 

811 

1,330 

1,075 

2,587 

12,420 

20,320 

7,514 

1,321 

979 

1,283

4,331

952 

2,029 

5,542 

7,406 

4,463 

9,567 

18,630 

19,290 

7,111 

1,303 

921 

1,119

6,537

Run- off 

in 

acre-feet

167,276 

388,959 

1,454,995 

1,533,025 

763,577 

782,479 

1,259,702 

562,988 

125,722 

56,202 

50,541 

42,908

7,188,374

48,783 

244,721 

267,780 

336,337 

361,924 

485,018 

873,124 

1,417,388 

583,736 

89,359 

61,714 

74,142

4,844,026

64,879 

37,325 

48,179 

100,374 

113,415 

354,942 

1,010,261 

1,352,331 

312,357 

65,107 

65,780 

68,501

3,593,451

84,536 

46,840 

49,849 

81,759 

59,718 

159,055 

739,041 

1,249,587 

447,134 

81,235 

60,212 

76,320

3,135,286

58 , 542 

120,714 

340,740 

455,385 

247,855 

588,278 

1,108,304 

1,186,314 

423,114 

80,089 

56,634 

66,583

4,732,552

Diversion 

through 

Spokane 

Valley 

Farms 

Co. 's Cana 

(acre-feet

0 

0 

0 

0 

0 

0 

4,320 

15,864 

15,862 

15,275 

14,670 

6,857

72,848

0 

0 

0 

0 

0 

561 

4,080 

14,949 

16,620 

16,580 

15,947 

7,567

76,304

0 

0 

0 

0 

0 

0 

0 

14,707 

17,129 

16,366 

14,965 

6,609

69,776

0 

0 

0 

0 

0 

0 

0 

9,338 

15,822 

16,332 

15,477 

6,752

63,721

0 

0 

0 

0 

0 

0 

934 

11,092 

15,751 

16,812 

16,259 

7,751

68,599

Adjusted for diversion

Run-off 

in 

acre-feet

167,276 

388,959 

1,454,995 

1,533,025 

763,577 

782,479 

1,264,022 

578,852 

141,584 

71,477 

65,211 

49,765

7,261,222

48,783 

244,721 

267,780 

336,337 

361,924 

485,579 

877,204 

1,432,337 

600,356 

105,939 

77,661 

81,709

4,920,330

64,879 

37,325 

48,179 

100,374 

113,415 

354,942 

1,010,261 

1,367,038 

329,486 

81,473 

80,745 

75,110

3,663,227

84,536 

46,840 

49,849 

81,759 

59,718 

159,055 

739,041 

1,258,925 

462,956 

97,567 

75,689 

83,072

3,199,007

58,542 

120,714 

340,740 

455,385 

247,855 

588 , 278 

1,109,238 

1,197,406 

433,865 

96,901 

72,893 

74,334

4,801,151

Discharge in 

second-feet

Mean

2,720 

6,537 

23,660 

24,930 

13,750 

12,730 

21,240 

9,414 

2,380 

1,162 

1,061 

836

10,030

793 

4,113 

4,355 

5,470 

6,517 

7,897 

14,740 

23,290 

10,090 

1,723 

1,263 

1,373

6,796

1,055 

627 

784 

1,632 

1,972 

5,773 

16,980 

22,230 

5,537 

1,325 

1,313 

1,262

5,046

1,375 

787 

811 

1,330 

1,075 

2,587 

12,420 

20,470 

7,780 

1,587 

1,231 

1,396

4,419

952 

2,029 

5,542 

7,406 

4,463 

9,567 

18,640 

19,470 

7,375 

1,576 

1,185 

1,249

6,632

Per 

square 

mile

-

2.59

-

1.75

-

1.30

-

1.14

-

1.71

Runoff 

in 

inches

-

35.15

-

23.75

-

17.69

-

15.47

-

23.20
SPOKANE RIVER BASIN 203

Yearly discharge of Spokane River at Post Falls, Idaho

Year

Observed

Mean 

discharge 

in 

secondfeet

Run-off 

in 

acre-feet

Diversion

Spokane 

Valley 

Farms 

Co.'s Canal 

(acre-feet)

Adjusted for diversion

Run- off

in 

acre-feet

Discharge in 

second-feet

Mean

Per 

square 

mile

Runoff 

in 

inches

Year ending Sept. 30

1914

1915

1918.........

1920

1 GO'1

~\ CtOO

1923.........

1924.........

1928.........

1929.........

1 Q"^O

1933.........

1934.........

1938.........

Highest. . . . 

Average ....

5,517 3,666 ' 

8,579 

7,801 

7,806

6,341 

4,150 

7,918 

5,005 

5,785

4,244 

7,535 

3,370 

8,057 

9.053

3,014 

2,956 

3,526 

7,356 

7.234

9,929 

6,691 

4,950 

4,331 

6,537

9,929 

6,054 

2,956

3,994,000 

2,654,000 

6,228,000 

5,647,000 

5,651,000

4,591,000 

3,013,000 

5,733,000 

3,624,000 

4,188,000

3,081,000 

5,455,000 

2,440,000 

5,833,000 

6.572.000

2,182,000 

2,140,000 

2,553,000 

5,340,000 

5,237,000

7, 188' 000 

4,844,000 

3,593,000 

3,135,000 

4,733,000

7,188,000 

4,386,000 

2,140,000

48,170 

42,770 

47,010 

42,650 

49,010

*51,380 

45,880 

49,040 

43,250 

47,220

64,880 

65,740 

72,720 

68,400 

67.090

55,100 

64,400 

69,850 

65,250 

68,730

72'850 

76,300 

69,780 

63,720 

68,600

76,300 

59,190 

42,650

4,042,000 

2,697,000 

6,275,000 

5,690,000 

5,700,000

 4,642,000 

3,059,000 

5,782,000 

3,667,000 

4,235,000

3'l46'oOO 

5,521,000 

2,513,000 

5,901,000 

6.639.000

2,237,000 

2,204,000 

2,623,000 

5,405,000 

5,306,000

7,261,000 

4,920,000 

3,663,000 

3,199,000 

4,802,000

7,261,000 

4,445,000 

2,204,000

5,584 

3,725 

8,644 

7,860 

7.874

*6,412 

4,213 

7,986 

5,065 

5.850

4)334 

7,626 

3,471 

8,151 

9.146

3,090 

3,045 

3,622 

7,446 

7,329

10,030 

6,796 

5,046 

4,419 

6,632

10,030 

6,136 

3,045

1.44 

.960 

2.23 

2.03 

2.03

1.65 

1.09 

2.06 

1.31 

1.51

1.12 

1.97 

.895 

2.10 

2.36

.796 

.785 

.934 

1.92 

1.89

2.59 

1.75 

1.30 

1.14 

1.71

2.59 

1.58 

.785

19.54 

13.03 

30.35 

27.55 

27.55

22.39 

14.83 

27.95 

17.78 

20.49

15.24 

26.73 

12.15 

28.50 

32.12

10.80 

10.65 

12.67 

26.13 

25.65

35.15 

23.75 

17.69 

15.47 

23.20

35.15 

21.49 

10.65

Calendar year

1 Q1 "^

1915

1 Q1 C

1917.........

1918.........

1919

1 Q9T

1922.........

1923.. ....... 

1924

1925

1926

1927.........

1926.........

1 Q9Q

-1 Q-ZT

1932..... ....

1933.........

1 Q"^A

1 Q"^R

1937.........

1938.........

Highest. .. . 

Average .... 

Lowest.. ...

7,903 

5,540 

3,391 

8,568 

8,164

7,581 

6,077 

4,740 

7,799 

4,569

5,858 

4,502 

7,189 

4,463 

9,456

6,539 

2,966 

2,968 

3,512 

8,002

9,127 

7,926 

6,123 

4,992 

4,799

6,135

9,456 

6,111 

2,966

5,721,000 

4,011,000 

2,455,000 

6,220,000 

5.910,000

5,489,000 

4,400,000 

3,441,000 

5,646,000 

3,308,000

4,241,000 

3,269,000 

5,205,000 

3,231,000 

6.846.000

4,747,000 

2,148,000 

2,148,000 

2,543,000 

5,809,000

6,607,000 

5,738,000 

4,433,000 

3,624,000 

3.474.000

4,442,000

6,846,000 

4,427,000 

2,148,000

42,010 

45,430 

43,270 

47,000 

42,900

49,010 

*49,420 

46,720 

46,680 

41,980

44,920 

64,010 

65,740 

72,720 

68,400

67,090 ' 

55,100 

64,400 

69,850 

65,250

68,730 

72,850 

76,300 

69,780 

63,720

69*400

76,300 

58,180 

41,980

5,763,000 

4,056,000 

2,498,000 

6,267,000 

5,953,000

5,538,000 

«4,449,000 

3,488,000 

5,693,000 

3,350,000

4,286,000 

3,333,000 

5,271,000 

3,304,000 

6.914.000

4,814,000 

2,203,000 

2,212,000 

2,613,000 

5,874,000

6,676,000 

5,811,000 

4,509,000 

3,694,000 

3.538.000

4 '51l' 000

6,914,000 

4,485,000 

2,203,000

7,961 

5,603 

3,450 

8,632 

8,223

7,649 

*6,145 

4,804 

7,863 

4,627

5,920 

4,591 

7,280 

4,564 

9,551

6,632 

3,043 

3,057 

3,609 

8,091

9,222 

8,027 

6,229 

5,089 

4.887

6,231

9,551 

6,192 

3,043

2.05 

1.44 

.889 

2.22 

2.12

1.97 

1.58 

1.24 

2.03 

1.19

1.53 

1.18 

1.88 

1.18 

2.46

1.71 

.784 

.788 

.930 

2.09

2.38 

2.07 

1.61 

1.31 

1.26

1.61

2.46 

1.60 

.784

27.82 

19.54 

12.06 

30.21 

28.77

26.73 

21.44 

16.88 

27.55 

16.15

20.76 

16.06 

25.51 

16.01 

33.38

23.27 

10.64 

10.69 

12.62 

28.44

32.30 

28.09 

21.85 

17.83 

17.10

21.85

33.38 

21.68 

10.64

* Previously published in error.

North Pork of Coeur d'Alene River near Enaville, Idaho

Location.- Staff gage, lat. 47°37', long. 116°15', in sec. 6, T. 49 N., R. 2 E., at

Canning's ranch, 1 mile upstream from mouth, 5 miles north of Enaville, and below all

tributaries.

Records available.- October 1911 to December 1912. 

Extremes.- Maximum discharge observed, 2,250 second-feet Apr. 11, 1912 (gage height, 12.3

feet); minimum observed, 50 second-feet Oct. 23-29, Oct. 31 to Nov. 5, Nov. 11-13, 1911

(gage height, 7.60 feet). 

Remarks.- No diversion or regulation.
204 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of North Fork of Coeur d'Alene River near Bnavllle, Idaho

Month

1911-12

April. .........................................

1912

Discharge In aecond-feet

Maximum

35 

1,090 

116 

690 

970 

540 

2,250 

1,550 

590 

180 

151 

180

-

142 

1,760 

285

-

Minimum

30 

30 

51 

51 

187 

80 

565 

640 

133 

58 

41 

44

-

41 

72 

79

-

Mean

3.0.6 

168 

69.9 

178 

439 

190 

1,330 

944 

242 

94.1 

52.0 

67.9

-

69.4 

449 

125

-

Run- off 

in 

acre-feet

546 

10,000 

4,300 

10,900 

25,300 

11,700 

79,100 

58,000 

14,000 

5,790 

3,200 

4,040

227,000

4,270 

26,700 

7,690

38,700

St. Joe River at Avery, Idaho

Location.- Staff gage, lat. 47°15", long. 115°49', in sec. 15, T. 45 N., R. 5 E., at

Avery, Shoshone County, half a mile downstream from North Pork. 

Records available.- January 1911 to June 1917 (only fragmentary gage heights prior to

April 1911). 

Extremes.- Maximum discharge observed, 17,900 second-feet May 28, 1913 (f^age height, 7.3

feet); minimum not determined, probably occurred during winter. 

Remarks.- Above all important diversions; no regulation.

Monthly discharge of St. Joe River at Avery, Idaho

Month

1911 

Acril. . ........................................

May

1911-12

1912-13

April

May

September. .....................................

Discharge in second-feet

Maximum

8,000 

8,600 

6,400 

1,750 

630 

400

-

390 

1,590 

670 

1,140 

6,880 

8,120 

5,360 

1,680 

650 

880

573 

1,280 

1,280 

7,390 

17,,000 

13,100 

2,510 

781 

584

Minimum

1,630 

3,220 

1,520 

570 

340 

340

-

340 

340 

390 

285 

1,190 

2,380 

1,820 

650 

350 

315

360 

620 

480 

770 

2,600 

2,390 

645 

384 

280

Mean

3,570 

4,920 

3,340 

977 

462 

343

-

375 

566 

523 

503 

2,720 

5,570 

3,450 

960 

457 

423

428 

913 

616 

3,750 

8,980 

5,900 

1,220 

550 

348

Run-off 

in 

acre-feet

212,000 

303,000 

199,000 

60,100 

28,400 

20,400

823,000

23,100 

33,700 

30,100 

30,900 

162,000 

342,000 

205,000 

59,000 

28,100 

25,200

26,300 

54,300 

37,900 

, 223,000 

552,000 

351,000 

75,000 

33,800 

20,700
SPOKANE RIVER BASIN 205

Monthly discharge of St. Joe River at Avery, Idaho Continued

Month

1913-14

April .........................................

1914-15

May. ..........................................

1915-16

May. ..........................................

July. .........................................

1916-17

Discharge In second-feet

Maximum

432 

690

2,420 

6,800 

6,800 

2,990 

968 

498

-

610 

3,850 

983

1,580 

4,110 

2,870 

2,100 

890 

548 

462

4,110

393 

610 

718

4,910 

8,960 

11,400 

10,400 

4,960 

1,080 

608

11,400

433 

982 

4,700 

15,800 

11.300

Minimum

280 

310

598 

1,040 

2,870 

968 

485 

350

-

393 

637

439 

1,300 

1,580 

890 

548 

350 

330

330

300 

270 

290

2,100 

3,410 

4,700 

1,050 

433 

378

270

318 

345 

433 

3,160 

3.260

Mean

326 

491 

399 

470 

420 

1,390 

3,830 

5,180 

1,640 

695 

402

-

476 

1,530 

646 

550 

568 

823 

2,560 

2,080 

1,420 

696 

422 

361

1,010

343 

400 

441 

440 

566 

1,950 

3,850 

5,710 

7,040 

2,500 

663 

431

2,030

359 

525 

2,110 

8,610 

6.360

Run-off 

in 

acre-feet

20,000 

29,200 

24,500 

28,900 

23,300 

35,500 

228,000 

319,000 

97,600 

42,700 

24,700

923,000

29,300 

91,000 

39,700 

33,800 

31,500 

50,600 

152,000 

128,000 

84,500 

42,800 

25,900 

21,600

731,000

21,100 

23,800 

27,100 

27,100 

32,600 

120,000 

229,000 

351,000 

419,000 

154,000 

40,800 

25,600

1,470,000

22,100 

12,500 

126,000 

529,000 

378.000

St. Joe River at Calder, Idaho

Location.- Water-stage recorder, lat. 47°16', long. 116°11', in sec. 3, T. 45 N., R. 2 

E., 150 feet southwest of Chicago, Milwaukee & St. Paul Railway station at Calder. 

Datum of gage is about 2,100 feet above mean sea level.

Drainage area.- 1,080 square miles.

Records available.- July 1920 to September 1938.

Extremes.- Maximum discharge, 53,000 second-feet Dec. 23, 1933, computed on basis of

slope between gages downstream; maximum gage height, 93.1 feet, from high-water mark, 

Apr. 18, 1938; minimum discharge, 96 second-feet Dec. 5, 1928 (gage height, 78.43 

feet).

Remarks.- No diversions above gage. Operation of splash dam at Marble Creek causes some 

diurnal fluctuation during log-driving season.

Monthly discharge of St. Joe River at Calder, Idaho

Month

1920

Discharge In second-feet

Maximum

2,000 

1,180 

1,620

Minimum

718 

435 

435

Mean

1,200 

647 

805

Per 

square 

mile

1.11 

.599 

.745

Run- off

Inches

0.78 

.69 

.83

Acre-feet

45,200 

39,800 

47,900

527283 O - 43 - 14
206 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of St. Joe River at Calder, Idaho Continued

Month

1920-21

April.........................

The

1921-22

May...........................

The

1922-23

1923-24

May...........................

1924-25

April.........................

Discharge In second-feet

Maximum

1,560 

3,490 

7,150 

3,460 

5,150 

11,500 

10,900 

16,800 

9,400 

2,030 

685 

691

16,800

730 

1,580 

9,380 

900

1,360 

6,220 

16,600 

11,700 

1,940 

780 

640

16,600

468 

967 

1,640 

4,540 

798 

5,950 

11,400 

13,000 

8,310 

2,620 

932 

558

13,000

978 

1,640 

1,280

1,700 

9,170 

12,500 

2,740 

1,090 

565 

480

12,500

590 

2,330 

6,300

5,060 

16,600 

13,200 

5,690 

2,060 

921 

612

-

Minimum

870 

630 

655 

930 

703 

1,910 

3,010 

6,150 

2,030 

601 

420 

440

420

430 

310 

615

1,260 

5,980 

2,040 

750 

430 

340

-

276 

202

350

580 

2,960 

4,380 

2,700 

892 

526 

375

-

323 

311 

254

1,350 

943 

957 

2,760 

1,080 

500 

360 

360

_

345 

540 

590

1,390 

1,390 

5,800 

6,270 

2,130 

766 

512 

440

-

Mean

1,240 

1,440 

1,330 

1,620 

2,140 

4,040 

5,900 

12,500 

5,040 

1,150 

535 

518

3,120

479 

559 

2,000 

481 

456 

689 

3,170 

9,450 

5,850 

1,200 

596 

401

2,120

334 

374 

516 

1,260 

539 

1,240 

6,200 

8,260 

5,440 

1,510 

682 

453

 2,240

460 

551 

600 

539 

2,180 

1,250 

4,100 

7,680 

1,830 

761 

447 

397

1,730

414 

995 

1,620 

1,440 

4,050 

2,640 

10,500 

10,500 

3,700 

1,200 

632 

490

3,170

Per 

square 

mile

1.15 

1.33 

1.23 

1.50 

1.98 

3.74 

5.46 

11.6 

4.67 

1.06 

.495 

.480

2.89

.444 

.518 

1.85 

.445 

.422 

.638 

2.94 

8.75 

5.42 

1.11 

.552 

.371

1.96

.309 

.346 

.478 

1.17 

.499 

1.15 

5.74 

7.65 

5.04 

1.40 

.631 

.419

2.07

.426 

.510 

.556 

.499 

2.02 

1.16 

3.80 

7.11 

1.69 

.705 

.414 

.368

1.60

.383 

.921 

1.50 

1.33 

3.75 

2.44 

9.72 

9.72 

3.43 

1.11 

.585 

.454

2.94

Run- off

Inches

1.33 

1.48 

1.42 

1.73 

2.06 

4.31 

6.09 

13.37 

5.21 

1.22 

.57 

.54

39.33

 51 

.58 

2.13 

.51 

.44 

.74 

3.28 

10.09 

6.05 

1.28 

.64 

.41

26.66

.36 

.39 

.55 

1.35 

.52 

1.33 

6.40 

8.82 

5.62 

1.61 

.73 

.47

28.15

.49 

.57 

.64 

.58 

2.18 

1.34 

4.24 

8.20 

1.89 

.81 

.48 

.41

21.83

.44 

1.03 

1.73 

1.53 

3.90 

2.81 

10.84 

11.21 

3.83 

1.28 

.67 

.51

39.78

Acre-feet

76,200 

85,700 

81,800 

99,600 

119,000 

248,000 

351,000 

769,000 

300,000 

70,700 

32,900 

30,800

2,260,000

29,500 

33,300 

123,000 

29,600 

25,300 

42,400 

189,000 

581,000 

348,000 

73,800 

36,600 

23,900

1,540,000

20,500 

22,300 

31,700 

77,500 

29,900 

76,200 

369,000 

508,000 

324,000 

92,800 

41,900 

27,000

1,620,000

28,300 

32,800 

36,900 

33,100 

125,000 

76,900 

244,000 

472,000 

109,000 

46,800 

27,500 

23,600

1,260,000

25,500 

59,200 

99,600 

88,500 

225,000 

162,000 

625,000 

646,000 

220,000 

73,800 

38,900 

29,200

2,290,000
SPOKANE RIVER BASIN 207

Monthly discharge of St. Joe River at Calder, Idaho--Continued

Month

1925-26

May. ..........................

July. .........................

September .....................

1926-27

March

The year ...................

1927-28

1928-29

May...........................

The year ...................

1929-30

The year ...................

Discharge In second-feet

Maximum

560 

524 

2,030 

780 

2,560 

3,770 

10,800 

7,300 

1,680 

923 

786 

1,230

10,800

1,950 

7,4?,0 

9,600 

2,070 

3,110 

2,840 

17,000 

17,300 

13,400 

3,270 

1,070 

1,340

17,300

2,800 

12,400 

9,720

2,060 

7,270 

11,800 

16,300 

6,020 

1,760 

734 

456

16,300

890 

800 

728 

281

3,120 

7,450 

8,510 

4,500 

1,630 

659 

415

8,510

592 

338 

2,160 

472 

3,510 

3,920 

8,240 

5,790 

3,200 

1,P10 

526 

510

8,240

Minimum

345 

275

450

492 

1,350 

1,470 

1,750 

722 

395 

321 

395

275

534 

865

842 

984 

1,240 

2,150 

6,270 

3,540 

1,110 

573 

538

534

1,050 

1,380

1,140 

1,190 

2,360 

6,560 

1,950 

746 

433 

333

333

305 

263 

147

956 

3,840 

1,690 

691 

411 

321

147

222 

175 

230 

200 

300 

719 

3,510 

2,980 

1,210 

521 

387 

316

175

Mean

390 

281 

792 

509 

1,110 

2,270 

5,260 

3,590 

1,150 

554 

405 

549

1,410

1,100 

2,030 

2,950 

1,380 

1,390 

1,670 

5,130 

9,720 

8,400 

1,830 

773 

798

3,100

1,620 

6,020 

3,530 

2,670 

1,540 

3,380 

4,480 

12,220 

3,410 

1,130 

550 

381

3,420

413 

372 

291 

204 

239 

986 

2,820 

5,850 

3,110 

1,020 

519 

363

1,360

323 

258 

590 

290 

992 

1,580 

5,850 

3,770 

2,110 

820 

466 

373

1,450

Per 

square 

mile

0.361 

.353 

.733 

.471 

1.03 

2.10 

4.87 

3.32 

1.06 

.513 

.375 

.508

1.31

1.02 

1.88 

2.73 

1.28 

1.29 

1.55 

4.75 

9.00 

7.78 

1.69 

.716 

.739

2.87

1.50 

5.57 

3.27 

2.47 

1.43 

3.13 

4.15 

11.3 

3.16 

1.05 

.509 

.353

3.17

.382 

.344 

.269 

.189 

.221 

.913 

2.61 

5.42 

2.88 

.944 

.481 

.336

1.26

.299 

.239 

.546 

.269 

.919 

1.46 

5.42 

3.49 

1.95 

.759 

.431 

.345

1.34

Run- off

Inches

0.42 

.39 

.85 

.54 

1.07 

2.42 

5.43 

3.83 

1.18 

.59 

.43 

.57

17.72

1.18 

2.10 

3.15 

1.48 

1.34 

1.79 

5.30 

10.38 

8.68 

1.95 

.83 

.82

39.00

1.73 

6.21 

3.77 

2.85 

1.54 

3.61 

4.63 

13.03 

3.53 

1.21 

.59 

.39

43.09

.44 

.38 

.31 

.22 

.23 

1.05 

2.91 

6.25 

3.21 

1.09 

.55 

.37

17.01

.34 

.27 

.63 

.31 

.96 

1.68 

6.05 

4.02 

2.18 

.88 

.50 

.38

10.20

Acre-feet

24,000 

22,700 

48,700 

31,300 

61,600 

140,000 

313,000 

221,000 

68,400 

34,100 

24,900 

32,700

1,020,000

67,600 

121,000 

181,000 

84,800 

77,200 

103,000 

305,000 

598,000 

500,000 

113,000 

47,500 

47,500

2,250,000

99,600 

358,000 

217,000 

164,000 

88,600 

208,000 

267,000 

750,000 

203,000 

69,500 

33,800 

22,700

2,480,000

25,400 

22,100 

17,900 

12,500 

13,300 

60,600 

168,000 

360,000 

185,000 

62,700 

31,900 

21,600

981,000

19,900 

15,400 

36,300 

17,800 

55,100 

97,200 

348,000 

232,000 

126,000 

50,400 

28,700 

22,200

1,050,000
208, SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of St. Joe River at Calder, Idaho Continued

Month

1930-31

July..........................

1931-32

July..........................

1932-33

1933-34

May...........................

1934 -35

May...........................

Discharge in second-feet

Maximum

760 

1,600 

420 

1,600 

990 

4,460 

6,710 

8,510 

2,450 

795 

521 

498

8,510

477 

760

1,060 

6,240 

5,570 

IS, 400 

16,600 

6,950 

2,140 

757 

515

16,600

707 

3,430 

5,570 

2,600 

600 

2,270 

15,200 

14,100 

18,400 

3,350 

956 

697

18,400

6,950 

11,800 

40,000 

11,500 

4,370 

18,600 

12,800 

6,710 

2,390 

857 

481 

472

40,000

3,070 

2,310 

3,340 

2,500 

1,450 

5,100 

10,400 

12,900 

7,510 

1,990 

742 

472

12,900

Minimum

338 

375 

290 

290 

498 

582 

2,510 

2,580 

826 

460 

281 

261

261

264 

250

330

878 

3,590 

6,240 

2,200 

763 

477 

376

250

366 

502 

550 

550 

450 

592 

1,640 

5,260 

3,670 

857 

516 

456

366

443 

1,330 

1,250 

3,050 

2,390 

2,580 

6,710 

2,510 

890 

464 

302 

287

287

317 

807 

644 

450 

958 

939 

1,560 

7,040 

1,950 

701 

393 

325

317

Mean

464 

535 

349 

613 

673 

1,620 

4,110 

5,420 

1,390 

594 

379 

337

1,380

333 

391 

389 

437 

934 

2,100 

7,470 

12,000 

4,770 

1,260 

598 

435

2,600

463 

1,470 

1,480 

952 

524 

1,170 

5,780 

8,600 

10,100 

1,690 

671 

542

2,790

1,433 

2,824 

8,887 

5,442 

3,342 

6,414 

9,178 

4,404 

1,445 

632 

380 

344

3,733

.646 

1,342 

1,091 

1,144 

1,178 

1,756 

5,621 

9,232 

3,978 

1,152 

535 

366

2,341

Per 

square 

mile

0.430 

.495 

.323 

.568 

.623 

1.50 

3.81 

5.02 

1.29 

.550 

.351 

.312

1.28

.308 

.362 

.360 

.405 

.865 

1.94 

6.92 

11.1 

4.42 

1.17 

.554 

.403

2.41

.429 

1.36 

1.37 

.881 

.485 

1.08 

5.35 

7.96 

9.35 

1.56 

.621 

.502

2.58

1.33 

2.61 

8.23 

5.04 

3.09 

5.94 

8.50 

4.08 

1.34 

.585 

.352 

.319

3.46

.598 

1.24 

1.01 

1.06 

1.09 

1.63 

5.20 

8.55 

3.68 

1.07 

.495 

.339

2.17

Run- off

Inches

0.50 

.55 

.37 

.65 

.65 

1.73 

4.25 

5.79 

1.43 

.63 

.40 

.35

17.30

.36 

.40 

.42 

.47 

.93 

2.24 

7.72 

12,80 

4.93 

1.35 

.64 

.45

32.71

.49 

1.52 

1.58 

1.02 

.50 

1.24 

5.97 

9.18 

10.40 

1.80 

.72 

.56

34.98

1.53 

2.91 

9.49 

5.81 

3.22 

6.85 

9.48 

4.70 

1.50 

.67 

.41 

.36

46.93

.69 

1.38 

1.15 

1.22 

1.14 

1.88 

5.80 

9.86 

4.11 

1.23 

.57 

.37

29.40

Acre-feet

28,500 

31,800 

21,500 

37,700 

37,400 

99,600 

245,000 

333,000 

82,700 

36,500 

23,300 

20,100

997,000

20,500 

23,300 

23,900 

26,900 

53,700 

129,000 

444,000 

738,000 

284,000 

77,500 

36,800 

25,900

1,880,000

28,500 

87,500 

91,000 

58,500 

29,100 

71,900 

344,000 

529,000 

601,000 

104,000 

41,300 

32,300

2,020,000

88,100 

168,000 

546,500 

334,600 

185,600 

394,400 

546,100 

270,800 

85,980 

38,870 

23,390 

20,480

2,703,000

39,700 

79,830 

67,080 

70,310 

65,440 

108,000 

334,500 

567,600 

236,700 

70,830 

32,870 

21,790

1,695,000
SPOKANE RIVER BASIN 209

Monthly discharge of St. Joe River at Calder, Idaho Continued

Month

1935-56

May...........................

July..........................

September. ....................

1936-37

May...........................

1937-38

The year ...................

Discharge in second- feet

Maximum

490 

593 

449 

753 

1,000 

2,500 

17,500 

15,000 

4,750 

1,510 

601 

472

17,500

576 

382 

717 

270 

520 

1,250 

7,590 

11,700 

5,470 

1,740 

795 

462

11,700

458 

1,650 

2,150 

2,000 

1,010 

4,170 

59,400 

15,400 

6,700 

1,740 

795 

765

59,400

Minimum

301 

264 

212 

264 

270 

535 

568 

4,410 

1,350 

584 

579 

504

212

278 

198 

260 

200 

210 

500 

1,010 

3,630 

1,830 

634 

400 

326

198

310 

316 

558 

500 

584 

1,250 

1,650 

5,470 

1,850 

729 

420 

342

310

Mean

.544 

532 

324 

385 

344 

1,078 

9,307 

8,122 

2,767 

882 

465 

565

2,056

307 

259 

359 

238 

258 

725 

5,097 

7,997 

5,180 

1,027 

531 

560

1,556

554 

672 

1,017 

992 

778 

2,072 

9,112 

8,458 

5,778 

1,149 

576 

407

2,449

Per 

square 

mile

0.519 

.307 

.300 

.355 

.319 

.998 

8.62 

7.52 

2.56 

.817 

.431 

.336

1.90

.284 

.240 

.352 

.220 

.259 

.671 

2.87 

7.40 

2.94 

.951 

.492 

.555

1.42

.528 

-.622 

.942 

.919 

.720 

1.92 

8.44 

7.85 

5.50 

1.06 

.555 

.577

2.27

Run- off

Inches

0.57 

.54 

.55 

.41 

.34 

1.15 

9.62 

8.67 

2.86 

.94 

.50 

.37

25.92

.33 

.27 

.38 

.25 

.25 

.77 

3.20 

8.55 

5.28 

1.10 

.57 

.57

19.30

.58 

.69 

1.09 

1.06 

.75 

2.21 

9.42 

9.05 

5.90 

1.22 

.61 

.42

50.78

Acre-feet

21,160 

19,750 

19,900 

23,540 

19,810 

66,280 

553,800 

499,400 

164,600 

54,220 

28,590 

21,600

1,495,000

18,850 

15,410 

22,060 

14,640 

14,340 

44,590 

184,300 

491,700 

189,200 

63,160 

52,650 

21,410

1,112,000

21,780 

59,970 

62,560 

61,020 

45,220 

127,400 

542,200 

520,100 

224,800 

70,650 

35,440 

24,230

1,773,000

Yearly discharge of St. Joe River at Calder, Idaho

Year

1925...........

1926... ........

1930.. .........

1951. .......... 

1932...........

1935...........

1936.... ....... 

1937...........

1958. ..........

Year ending Sept. 30

Discharge In 

sacond-feet

Mean

3,120 

2,120 

2,240 

1,730 

3.170

1,410 

5,100 

3,420 

1,360 

1,450

1,380 

2,600 

2,790 

3,735 

2.341

2,056 

1,536 

2,449

3,733 

2,334 

1,360

Per 

square 

mile

2.89 

1.96 

2.07 

1.60 

2.94

1.31 

2.87 

3.17 

1.26 

1.34

1.28 

2.41 

2.58 

3.46 

2.17

1.90 

1.42 

2.27

3.46 

2.16 

1.26

Run- off

Inches

39.33 

26.66 

28.15 

21.83 

39.78

17.72 

39.00 

43.09 

17.01 

18.20

17.30 

32.71 

54.98 

46.93 

29.40

25.92 

19.50 

30.78

46.93

29.34 

17.01

Acre-feet

2,260,000 

1,540,000 

1,620,000 

1,260,000 

2^290,000

1,020,000 

2,250,000 

2,480,000 

981,000 

1,050,000

997,000 

1,880,000 

2,020,000 

2,703,000 

1,695,000

1,493,000 

1,112,000 

1,773,000

2,705,000

1,690,000 

981,000

Calendar year

Discharge in 

second- feet

Mean

5,040 

1,970 

2,270 

1,850 

3,040

1,790 

3,520 

2,580 

1,560 

1,460

1,360 

2,790 

3,610 

T,883 

2,167

2,050 

1,630 

2,405

5,610 

2,321 

1,360

Per 

square 

mile

2.81 

1.82 

2.10 

1.71 

2.81

1.66 

3.26 

2.59 

1.26 

1.55

1.26 

2.58 

3.34 

2.67 

2.01

1.90 

1.51 

2.22

3.34 

2.15 

1.26

Run- off

Inches

38.32 

24.74 

28.55 

23.33 

38.24

22.49 

44.28 

32.51 

17.12 

18.38

17.06 

35.12 

45.32 

36.22 

27.24

25.84 

20.48 

30.20

45.32 

29.19

17.06

Acre-feet

2,210,000 

1,420,000 

1,640,000 

1,340,000 

2,200,000

1,300,000 

2,550,000 

1,870,000 

987,000 

1,060,000

985,000 

2,020,000 

2,610,000 

2,087,000 

1,569,000

1,488,000 

1,180,000 

1,740,000

2,610,000 

1,681,000 

983,000
210 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

St. Joe River near Calder, Idaho

Location.- Staff gage, lat. 47°16', long. 116°14', in sec. 5, T. 45 N., R. 2 E., at

logging camp, 2^ miles downstream from Calder. 

Records available.- April 1911 to September 1912. 

Extremes.- Maximum discharge observed, 15,400 second-feet May 21, 1912 (gage height, 9.0

feet); minimum observed, 380 second-feet Nov. 2, 1911 (gage height, 1.6 feet). 

Remarks.- No diversion or regulation.

Monthly discharge of St. Joe River near Calder, Idaho

Month

1911

1911-12

The year .....................................

Discharge in second-feet

Maximum

12,600 

14,100 

8,660 

2,210 

910 

830

-

690 

4,200 

830 

1,970 

1,970 

2,620 

8,660 

15,400 

8,520 

2,080 

870 

1,200

15,400

Minimum

2,620 

4,200 

2,080 

830 

520 

470

_

420 

380 

420 

420 

760 

570 

2,920 

4,830 

1,970 

750 

545 

495

380

tie an

6,840 

7,360 

4,300 

1,330 

682 

564

-

507 

962 

598 

1,040 

1,230 

1,030 

5,480 

9,860 

4,970 

1,170 

641 

634

2,340

Run- off 

in 

acre-feet

231,000 

453,000 

256,000 

81,800 

41,900 

33,600

1,100,000

31,200 

57,200 

36,800 

64,000 

70,800 

63,300 

326,000 

606,000 

296,000 

71,900 

39,400 

37,700

1,700,000

St. Maries River at Lotus, Idaho

Location.- Staff gage, lat. 47°14', long. 116°37', in sec. 20, T. 45 N., R. 2 W., just 

downstream from Lotus. Datum of gage is about 2,160 feet above mean sea level.

Drainage area.- 420 square miles.

Records available.- July 1911 to October 1912, July 1920 to September 1938.

Extremes.- Maximum discharge observed, 23,800 second-feet Dec. 22, 23, 1933 (gage 

height, 12.1 feet); minimum discharge, 16 second-feet (estimated) Nov. 21, 1929; 

minimum gage height, 2.71 feet Nov. 20, 1929.

Remarks.- No diversion or regulation; occasional backwater effect from logs.

Monthly discharge of St. Maries River at Lotus Idaho

Month

1911

1911-12

1920

Discharge in aecond-feet

Maximum

160 

107

160 

850 

182 

1,850 

1,670 

4,670 

4,020 

1,670 

402 

152 

495 

300

129 

111 

275

Minimum

79 

79

68 

79 

140 

260 

182 

1,580 

1,500 

300 

124 

82 

94 

94

79 

54 

58

Mean

114 

96.5

93.3 

205 

158 

869 

491 

3,330 

3,530 

735 

211 

104 

151 

150

95.3 

66.4 

111

Run- off 

in 

acre-feet

4,970 

2,300

5,740 

12,200 

2,820 

50,000 

30,200 

198,000 

156,000 

43,700 

13,000 

6,400 

8,980 

9,220

3,210 

4,080 

6,600
SPOKANE RIVER BASIN 211

Monthly discharge of St. Maries River at Lotus, Idaho Continued

Month

Discharge in second-feet

Per 

square 

mile

Run-off

Acre-feet

1920-21

October...........

November..........

December..........

January...........

February..........

March.............

April.............

May...............

June..............

July..............

August............

September.........

The year.......

1921-22 

October............

November...........

December...........

January............

February..........

March..............

April-..............

May................

June...............

July...............

August.............

September.........

The year........

1922-23 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July..............

August.............

September..........

The year........

1923-24 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1924-25 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July............ ...

August.............

September..........

The year........

292

590

2,700

2,350

1,910

7,710

3,450

1,400

565

266

143

346

7,710

465

780

2,120

2,780

2,780

1,120

2,780

92

382

2,920

2,310

3,950

1,340

3,030

243

231

64

3,950

144

490

1,120

1,020

1,480

200

102

93

135

171

,090

900

060

850

750

490

146

106

55

70

93

369

224

860

820

590

193

79

62

60

164

256

376

827

711

1,950

1,630

1,040

344

130

74.3

155

0.390

.610

.895

1.97

1.69

4.54

3.88

2.48

.819

.310

.177

.369

0.45

.68

1.03

2.27

1.76

5.35

4.33

2.86

.91

.36

.20

.41

60 638 1.52 20.61

205

260

760

1,070

277

372

412

81.9

53.2

70.6

1,810

1,810

552

97.1

79.5

57.5

.660

.886

.981

.195

.127

.168

4.31

4.31

1.31

.231

.189

.137

.76

.99

1.13

.22

.13

.19

4.81

1.13 15.30

1,010

425

256

92

64

49

57.1

77.3

80.6

610

159

644

1,860

821

817

159

87.4

54.1

.136

.184

.192

1.45

.379

1.53

4.43

.95

.95

.379

.208

.129

.16

.21

.22

1.67

.39

1.76

4.94

2.25

2.18

.44

.24

.14

4E2 14.60

672

243

275

204

86

47

37

36

69.6

125

204

148

1,170

495

764

647

146

66.5

48.9

54.0

.166 

.298 

.486 

-.352 

2.79 

1.18 

1.82 

1.54 

.348 

.158 

.116 

.129

.19

.33

.56

.41

3.01

1.36

2.03

1.78

.39

.18

.13

.14

36 324 .771

49

110

120

458

590

790

490

171

65

44

46

66.7

284

310

583

1,590

1,260

2,150

989

343

102

61.8

50.6

.159

.676

.738

1.39

3.79

3.00

5.12

2.35

.829

.243

.147

.120

.18

.75

.85

1.60

3.95

3.46

5.71

2.71

.92

.28

.17

.13

10,100

15,200

23,100

50,800

39,500

120,000

97,000

64,000

20,500

7,990

4,570

9,220

462,000

17,000

22,100

25,300

5,040

2,950

4,340

108,000

111,000

32,800

5,970

4,890

3,420

343,000

3,510

4,600

4,960

37,500

8,830

39,600

111,000

50,500

48,600

9,780

5,370

3,220

327,000

4,280

7,440

12,500

9,100

67,300

30,400

45,500

39,800

8,690

4,090

3,010

3,210

235,000

4,100

16,900

19,100

35,800

88,300

77,500

128,000

60,800

20,700

6,270

3,800

3,010

44 641 1.53 20.71 464,000
212 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of St. Maries River at Lotus, Idaho Continued

Month

Discharge in second-feet

Maximum

Per 

square 

mile

Inches Acre-feet

1925-26

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1926-27 

October.............

November...........

December............

January............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1927-28 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1928-29 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

1929-30 

October.............

November............

December............

January.............

February............

March...............

April...............

May.................

June................

July................

August..............

September...........

The year.........

204

160

885

2,800

1,750

1,320

490

270

98

122

306

2,800

236

2,860

2,570

3,810

1,640

3,420

2,370

1,640

315

105

380

3,810

1,220

5,800

3,810

1,250

4,840

3,990

2,120

442

192

71

76

5,800

118

245

126

107

51

1,030

1,500

835

478

134

45

45

1,500

172

102

250

64

2,000

2,270

790

1,830

790

145

48

90

458

458

157

78

47

41

60

69.6 

76.6

244

148 787"

902

810

319

135 

65.6 

54.0 

96.5

0.166

.182

.581

.352

1.87

2.15

1.93

.760

.321

.156

.129

.230

0.19

.20

.67

.41

1.95

2.48

2.15

.88

.36

.18

.15

.26

305 .726

315

652

960

780

315

92

64

82

137

541

654

409

1,180

1,030

1,720

1,390

814

178

83.4

161

.326

1.29

1.56

.974

2.81

2.45

4.10

3.31

1.94

.424

.199

.383

.37

1.44

1.80

1.12

2.93

2.82

4.57

3.82

2.16

.49

.23

.43

686 1.6S 22.18

105

287

350

300

880

510

158

71

44

45

360

1,800

1,110

922

662

2,010

1,640

1,170

270

118

60.0

50.5

.857

4.29

2.64

2.20

1.58

4.79

3.90

2.79

.643

.281

.143

.120

.99

4.79

3.04

2.54

1.70

5.52

4.35

3.22

.72

.32

.16

.13

44 848 2.02

53

51

23

24

24

60

102

230

141

46

30

29

72.4

87.4

66.2

49.2

33.5

354

656

556

254

77.5

37.4

33.8

.172

.208

.158

.117

.080

.843

1.56

1.32

.605

.185

.089

.080

.20 

.23 

.18 

.13 

.08 

.97 

L.74 

L.52 

.68 

.21 

.10 

.09

23 190 .452

38

16

22

18

34

96

478

219

130

43

36

36

48.6

43.7

114

28.2

381

496

583

456

264

69.6

41.9

54.9

.116

.104

.271

.067

,907

.18

.39

.09

.629

.166

,100

.131

.13 

.12 

.31 

.08 

.94 

.36 

.55 

.26 

.70 

.19 

.12 

.15

4,280

4,560

15,000

9,100

43,700

55,500

48,200

19,600

8,030

4,030

3,320

5,740

221,000

8,420

32,200

40,200

25,100

65,500

63,300

102,000

85,500

48,400

10,900

5,130

9,580

496,000

22,100

107,000

68,200

56,700

38,100

124,000

97,600

71,900

16,100

7,260

3,690

3,000

616,000

4,450

5,200

4,070

3,030

1,860

21,800

39,000

34,200

15,100

4,770

2,300

2,010

138,000

2,990

2,600

7,010

1,730

21,200

30,500

34,700

28,000

15,700

4,280

2,580

3,270

2,270 16 214 .510 6.91 155,000
SPOKANE RIVER BASIN 213

Monthly discharge of St. Maries River at Lotus, Idaho Continued

Month

Discharge In second-feet

Maximum Minimum Mean

Per 

square 

mile

Run-off

Acre-feet

1930-31

October....................... 203

November...................... 573

December.......................

January....................... -

February...................... 790

March......................... 2,120

April......................... 3,990

May........................... 930

June.......................... 200

July.......................... 79

August........................ 35

September..................... _____92

The year................... 5.990

1931-32 

October....................... 140

November...................... 161

December...................... -

January....................... -

February...................... 3,200

March......................... 3,500

April......................... 4,410

May........................... 4,200

June.......................... 930

July.......................... 218

August........................ 70

September..................... _____51

The year................... 4,410

1932-33

October........,............... 151

November...................... 1,370

December...................... 880

January....................... 400

February...................... 220

March......................... 2,760

April......................... 3,740

May.......... ................. 2,580

June.......................... 2,240

July.......................... 253

August........................ 121

September..................... L<i -L

The year................... 5,740

1933-34 

October....................... 690

November...................... 2,080

December...................... 10,900

January....................... 6,620

February...................... 1» 560

March......................... 5,330

April......................... 2,760

May........................... 512

June.......................... 374

July.......................... 107

August........................ OD

September..................... _____'°

The year................... 10,900

1934-35

October....................... 852

November...................... 401

December...................... 3,360

January....................... 2,280

February...................... 1,440

March......................... 4 ,530

April......................... 3,990

May........................... 1»9BO

June.......................... 784

July. ...................... 208

August........................ »2

September..................... _____"^

The year................... 4,330

117

181

573

215

79

32

21

22

67.3 

87.3 

37.9 

87!o

240

916 

1,350

476

120 

50.0 

26.4 

43.7

0.160

.208

.090

.207

.571

2.18

3.21

1.13

.286

.119

.063

.104

0.18

.23 .10'

.24

.59

2.51

3.58

1.30

.32

.14

.07

.12

21 291 9.38

34

370

1,760

930

195

72

45

40

59.3

65.8

54.3

115

382

1,450

2,810

2,120

497

121

55.5

44.8

.141

.157

.129

.274

.910

3.45

6.69

5.05

1.18

.288

.132

.107

.16

.18

.15

.32

.98

3.98

7.46

5.82

1.32

.33

.15

.12

647 1.54 20.97

230

1,000

1,230

262

77

48

48

69.8

343

256

206

122

972

2,400

1,510

798

138

67.9

77.0

.166

.817

.610

.490

.290

2.31

5.71

3.60

1.90

.329

.162

.183

.19

.91

.70

.56

.30

2.66

6.37

4.15

2.12

.38

.19

.20

42 581 1.38 18.73

56

149

179

790

344

645

600

166

93

56

35

34

168

359

3,322

8,290

869

1,387

1,090

285

160

77.1

45.3

46.2

.400

.855

7.91

5.45

2.07

3.30

2.60

.679

.381

.184

.108

.110

.95

9.12

6.28

2.15

3.80

2.90

.78

.43

.21

.12

.12

34 846 2.01 27.32

46

87

87

130

315

315

637

832

162

72

44

39

120

194

348

544

497

1,039

2,170

1,346

359

115

59.4

42.3

.286

.462

.829

1.30

1.13

2.47

5.17

3.20

.855

.274

.141

.101

.33

.52

.96

1.50

1.23

2.85

S. 1??

3.69

.95

.32

.16

.11

4,140

5,190

2,320

5,350

13,300

56,300

80,300

29,300

7,140

3,070

1,620

2,600

211,000

3,650

3,920

3,340

7,070

22,000

89,200

167,000

130,000

29,600

7,440

3,410

2,670

469,000

4,290

20,400

15,700

12,700

6,780

59,800

143,000

92,800

47,500

8,480

4,180

4,580

420,000

10,350

21,370

204,300

140,800

48,270

85,310

64,970

17,550

9,530

4,740

2,780

2,750

612,700

7,370

11,530

21,390

33,430

27,610

63,880

129,100

82,750

21,340

7,070

3,650

2,520

39 569 1.35 18.39 411,600
214 SURFACE WATERS OF UPPER COLUMBIA RIVER BASIN, 1898-1938

Monthly discharge of St. Maries River at Lotus, Idaho--Continued

Discharge in second-feet

Maximum Mean square 

mile

Inches Acre-feet

1935-36

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1936-37 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The year........

1937-38 

October............

November...........

December...........

January............

February...........

March..............

April..............

May................

June...............

July...............

August.............

September..........

The. year........

92

114

220

330

500

2,360

3,670

2,120

1,630

139

56

84

33

33

39

50

60

247

208

338

142

56

32

37

56.7

70.5

89.7

138

113

817

2,058

1,015

396

97.5

43.4

49.2

0.135

.168

.214

.329

.269

1.95

4.90

2.42

.943

.232

.103

.117

0.16

.19

.25

.38

.29

2.25

5.47

2.79

1.05

.27

.12

.13

3,490

4,200

5,510

8,490

6,510

50,210

122,500

62,430

23,580

5,990

2,670

2,930

3,670 32 411 .979 13.35 298,500

52

80

205

40

70

,130

370

200

480

185

84

98

39

21

25

30

30

80

823

527

197

66

45

43

46.1

41.9

80.5

36.5

42.3

513

2,141

1,156

337

104

59.3

49.5

.110

.100

.192

.087

.101

1.22

5.10

2.75

.802

.248

.141

.118

.13

.11

.22

.10

.11

1.41

5.69

3.17

.89

.29

.16

.13

2,830

2,490

4,950

2,250

2,350

31,560

127,400

71,090

20,050

6,380

3,650

2,950

6,370 21 384 .914 278,000

101

1,380

1,900

1,830

549

3,670

7,980

1,560

434

134

73

266

45

63

119

238

276

662

812

460

138

63

41

38

66.5

280

577

618

382

1,567

2,002

789

246

92.9

54.6

60.2

.158

.667

1.37

1.47

.910

3.73

4.77

1.88

.586

.221

.130

.143

.18

.74

1.58

1.70

.95

4.30

5.32

2.17

.65

.25

.15

.16

4,090

16,630

35,470

37,990

21,220

96,370

119,100

48,520

14,670

5,710

3,360

3,580

7,980 38 562 1.34 18.15 406,700

Yearly discharge of St. Maries River at Lotus, Idaho

Year

Year ending Sept. 30

Discharge in 

second-feet

square 

mile

Run- off

Inches

Calendar year

Discharge in 

second-feet

Mean square 

mile

Run- off

1921.

1922.

1923.

1924.

1925.

T926.

1927.

1928.

1929.

1950.

638

474

452

324

641

"3T5F 

686 

848 

190 

214

1.52

1.13

1.08

.771

1.53

20.61

15.30

14.60

10.51

20.71

462,000

343,000

327,000

235,000

464.000

660

403

467

346

619

1.57

.960

1.11

.824

1.47

21.33

13.01

15.09

11.21

19.99

478,000

291,000

339,000

251,000

448.000

T726"

1.63

2.02 

.452 

.510

9.88

22.18

27.48

6.13

6.91

221,000

496,000

616,000

138,000

155,000

~3BT 

847 

594 

189 

212

.914

2.02

1.41

.450

.505

12.43

27.39

19.27

6.08

6.86

2VS060 

613,000 

432,000 

137,000 

154.000

1931.

1932.

1933.

1934.

1935.

TTOST

1937.

1938.

291

647

581

846

569

TIT 

384 

562

.693

1.54

1.38

2.01

1.35

.979

.914

1.34

9.38

20.97

18.73

27.32

18.39-

211,000

469,000

420,000

612,700

411.600

298,500

278,000

406,700

290

688

851

576

531

.690

1.64

2.03

1.37

1.26

.969

1.06

1.22

9.36

22.28

27.46

18.60

17.18

210,000 

499,000 

616,000 

417,000 

384^600

13.35

12.41

18.15

407

447

513

13.21

14.45

16.57

295,600

323,900

371,100

Highest. 

Average. 

Lowest..

848

504

190

2.02

1.20

.452

27.48

16.28

6.13

616,000

364,700

138,000

851

501

189

2.03

1.19

.450

27.46

16.21

6.08

616,000

363,200

137,000
INDEX

Acknowledgments...................

Agency Creek near Jocko, Mont.....

Anaconda, Mont., Racetrack Creek 

near.......................

Ashley Creek near Kalispell, Mont , near Kila, Mont................

Avery, Idaho, St. Joe River at...

Page

2

173-174

94

142-144

142

204-205

59-60 

111

129-132 

3-15 

148-151 

144-148 

171-173

108 

104

104-106 

106-107 

103-104 

98-99 

99-100 

101-102

174

Ball Creek near Bonners Perry, Idaho 

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

Belton, Mont., Middle Fork of

Flathead River at.............

Bibliography........................

Big Creek near Poison, Mont.........

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

Big Knife Creek near Jocko, Mont....

Bitterroot River, East Pork of, at

Conner, Mont..................

near Darby, Mont..................

near Grant sdale, Mont.............

near Missoula, Mont...............

West Pork of, near Darby, Mont....

Blackfoot River at Clearwater, Mont, 

near Bonner, Mont.................

North Pork of, near Ovando, Mont..

Blodgett Creek (tributary to Agency

Creek) near Jocko, Mont.......

Blodgett Creek (tributary to 

Bitterroot River) near 

Hamilton, Mont................ 109

Bonner, Mont., Blackfoot River near. 99-100 

Bonners Perry, Idaho, Ball Creek

near.......................... 59-60

Cow Creek near.................... 52-53

Kootenai River at................. 31-33

Myrtle Creek near................. 58-59

Boulder Creek near Leonia, Idaho..-. 40-43 

Boundary Creek near Port Hill, Idaho 70-72 

Brush Creek near Copeland, Idaho.... 64-65

Burnt Fork Creek near Stevensville,

Mont.......................... Ill

Calder, Idaho, St. Joe River at..... 205-209 

St. Joe River near................ 210

Caribou Creek near Moravia, Idaho... 57-58

Cataldo, Idaho, Coeur d'Alene River

near.......................... 192-197

Clark Fork above Missoula, Mont..... 73-75

at Missoula, Mont ................. 75-77

at St. Regi a, Mont................ 80-85

below Missoula, Mont .............. 77-79

near Heron, Mont .................. 91-94

near Plains, Mont................. 85-91

Clearwater, Mont., Blackfoot River

a 4- b*. QO QQ 

.......................... vo yy

Clearwater River at Clearwater, Mont. 102 

Coeur d'Alene River at Enaville,

Idaho......................... 191-192

at Prichard, Idaho................ 191

near Cataldo, Idaho............... 192-197

North Fork of, near Enaville,

Idaho......................... 203-204

Columbia Falls, Mont., Flathead

River at...................... 119-121

Flathead River near............... 115-118

South Fork of Flathead River near. 132-136 

Conner, Mont., East Fork of

Bitterroot River at........... 108

Coolin, Idaho, Priest River near.... 181-187

Cooperation......................... 1-2

Copeland, Idaho, Brush Creek near... 64-65 

Koot enai River near............... 34-36

Mission Creek at.................. 62-63

Parker Creek near................. 65-66

Rock Creek near................... 53-64

Trout Creek near. ................. 60-61

Corvallis, Mont., Willow Creek near. 110 

Cow Creek near Bonners Ferry, Idaho. 52-53

Page 

Crow Creek at Lozeau's ranch, near

Ronan, Mont................... 157

near Ronan, Mont.................. 155-156

Darby, Mont., Bitterroot River near. 104

West Pork of Bitterroot River near 103-104

Data, explanation of................ 2

Deep Creek at Moravia, Idaho........ 53-55

Dixon, Mont., Revais Creek near..... 178-180

Dry Creek near St. Ignatius, Mont... 161-163

East Pinley Creek near Jocko, Mont.. 176-177 

Eastport, Idaho, Moyie River at..... 43-46

Eileen, Idaho, Moyie River at....... 49-52

Enaville, Idaho, Coeur d'Alene River

at............................ 191-192

North Pork of Coeur d'Alene River

near.......................... 203-204

Palls Creek near Jocko, Mont........ 171

Pinley Creek near Jocko, Mont....... 174-175

Finn, Mont., Nevada Creek near...... 100-101

Flathead River at Columbia Palls,

Mont.......................... 119-121

at Flathead, British Columbia..... 113-115

Middle Fork of, at Belton, Mont... 129-132 

near Columbia Falls, Mont......... 115-118

near Poison, Mont................. 121-128

South Fork of, near Columbia Palls,

Mont.......................... 132-136

Fortine, Mont., Grave Creek near.... 39

Granite Creek near Libby, Mont......

Grantsdale, Mont., Bitterroot River 

near..........................

Grave Creek near Fortine, Mont......

Hamilton, Mont., Blodgett Creek near 

Skalkaho Creek near...............

Heron, Mont., Clark Fork near.......

Rubbart, Mont., Little Bitterroot

River near....................

Indian ditch near Jocko, Mont.......

Introduction. ............". . .

Jocko, Mont., Agency Creek near.....

Big Khife Creek near..............

Blodgett Creek near...............

East Finley Creek near............

Palls Creek near..................

Finley Creek near.................

Indian ditch near. ................

Jocko River near..................

Middle Fork of Jocko River near...

North Fork of Jocko River near....

South Fork of Jocko River near--.. 

Jocko River at Ravalli, Mont........

Middle Fork of, near Jocko, Mont..

near Jocko, Mont..................

North Fork of, near Jocko, Mont...

South Fork of, near Jocko, Mont...

Kalispell, Mont., Ashley Creek near.

Stillwater River near.............

Whitef ish Creek near..............

Katka, Idaho, Kootenai River at.....

Kila, Mont., Ashley Creek near......

Kootenai River at Bonners Ferry,

Idaho.........................

at Katka, Idaho...................

at Leonia, Idaho..................

at Libby, Mont ....................

at Newgate, British Columbia......

at Port Hill, Idaho...............

near Copeland, Idaho..............

near Rexford, Mont................

Kootenai River Basin, British

Columbia-Mont.-Idaho, gagingstation records in............

104-106 

39

109

109

91-94

153-154

177-178

1

173-174 i^i-rrs

174 

176-177

171

174-175 

177-178 

167-168

169-170

170-171 

166

168-169

169-170

167-168

170-171

166

142-144

137-138

140-142

29-30

142

31-33 

29-30 

26-28 

21-25 

16-18 

36-39 

34-36 

18-20

215
216 INDEX

Page

Leonla, Idaho, Boulder Creek near... 40-43 

Kootenai River at................. 26-28

Llbby, Wont., Granite Creek near.-.. 39-40 

Kootenai River at................. 21-25

Little Bitterroot River near Hubbart,

Mont.......................... 153-154

near Marion, Wont ................. 152-153

near Niarada, Wont................ 154

Logan Creek at Tally Lake, near

Whltefish, Wont............... 138-139

near Whiteflsh, Mont.............. 139

Lolo Creek near Lolo, Mont.......... 112

Long Canyon Creek near Port Hill,

Idaho......................... 66-68

Lotus, Idaho, St. Maries River at...210-214

Marion, Wont., Little Bitterroot

River near....................152-153

Mission Creek (Kootenai River Basin)

at Copeland, Idaho............ 62-63

Mission Creek (Fend Oreille River

Basin) near St. Ignatius, Mont 158-161 

Missoula, Mont., Bitterroot River

near.......................... 106-107

Clark Fork above.................. 73-75

Clark Fork at..................... 75-77

Clark Fork below.................. 77-79

Rattlesnake Creek at.............. 102-103

Moravia, Idaho, Caribou Creek near.. 57-58 

Deep Creek at..................... 53-55

Snow Creek near................... 56-57

Moyie River at Eastport, Idaho...... 43-46

at Eileen, Idaho.................. 49-52

at Snyder, Idaho.................. 46-48

Mud Cr*ek near Ronan, Mont.......... 158

Myrtle Creek near Bonners Perry,

Idaho......................... 58-59

Nevada Creek near Finn, Mont........ 100-101

Newgate, British Columbia, Kootenai

River at...................... 16-18

Niarada, Mont., Little Bitterroot

River near.................... 154

Ovando, Mont., North Fork of Blackfoot River nea.r............... 101-102

Parker Creek near Copeland, Idaho... 65-66 

Fend Oreille River Basin, Wont.-

Brltish Columbia-Idaho, gaging 

station records in............ 73-190

Philipsburg, Mont., East Fork of Rock

Creek near-................... 96-97

Middle Fork of Rock Creek near..-. 94 

Plains, Mont., Clark Fork near...... 85-91

Poison, Mont-, Big Creek near....... 148-151

Flathead River near............... 121-128

Port Hill, Idaho, Boundary Creek near 70-72 

Kootenai River at................. 36-39

Long Canyon Creek near............ 66-68

Smith Creek near.................. 68-70

Post Creek at Deschamp's ranch, near

Ronan, Mont................... 164

at Fitzpatrick's ranch, near Ronan,

Wont.......................... 163-164

near St. Ignatius, Wont........... 165-166

Post Falls, Idaho, Spokane River at.197-203 

Prichard, Idaho, Coeur d'Alene River

at..... ....................... 191

Page

Priest River, Idaho, Priest River at. 190 

Priest River near..............187, 188-189

Priest River at Falk' 3 ranch, near

Priest River, Idaho............ 187

at Priest River, Idaho............. 190

near Coolin, Idaho................. 181-187

near Priest River, Idaho........... 188-189

Prospect Creek near Thompson Falls,

Mont........................... 181

Qulgley, Mont., Ranch Creek near.- 

Rock Creek near.................

97-98 

95-96

Racetrack Creek near Anaconda, Wont.. 94 

Ranch Creek near Qulgley, Wont...--.. 97-98 

Rattlesnake Creek at Missoula, Wont.. 102-103 

Ravalli, Wont., Jocko, River at....... 168-169

Valley Creek near.................. 178

Revais Creek near Dixon, Mont........ 178-180

Rexford Wont., Kootenai River near.. 18-20 

Rock Creek (Kootenai River Basin)

near Copeland, Idaho........... 63-64

Rock Creek (Pend Oreille River ftisin) East

Fork of, near Philipsburg, Wont. 96-97

Widdle Fork of, near Philipsburg,

Wont........................... 94

near Quigley, Wont................. 95-96

Ronan, Wont., Crow Creek near. .155-156, 157

Mud Creek near........... . 158

Post Creek near..............- -163, 164

St. Ignatius, Wont., Dry Creek near.. 161-163

Mission Creek near........... 158-161

Post Creek near.......... 165-166

St. Joe River at Avery, Idaho........ 204-205

at Calder, Idaho................... 205-209

near Calder, Idaho............. 210

St. Waries River at Lotus, Idaho..... 210-214

St. Regis, Mont., Clark Fork at...... 80-85

St. Regis River near St. Regis, Mont. 112-113

Skalkaho Creek near Hamilton, Wont... 109

Smith Creek near Port Hill, Idaho-... 68-70

Snow Creek near Woravia, Idano...-- 56-57

Snyder, Idaho, Woyie River at........ 46-48

Spokane River at POST; jtells, Idaho... 197-203 

Spokane River Baoin, Rtaho, gaging

station records in. ............ 191-^14

Stevensvllle, Wont., Burnt Fork Creek

near........................... Ill

Stlllwater River near Kallspell, Wont.137-138

near Whiteflsh, Mont............... 136-137

Swan River near Big Fork, Wont....... 144-148

Thompson Falls, Mont., Prospect Creek

near........................... 181

Thompson River near Thompson Falls,

Mont........................;.. 180

Trout Creek near Copeland, Idaho..... 60-61

Valley Creek near Ravalli, Mont...... 178

Victor, Mont , Bear Creek near....... Ill

Whiteflsh, Wont., Logan Creek near...138, 139 

Stillwater River near.............. 136-137

Whitefish Creek near Kali spell, Wont. 140-142 

Willow Creek at Anflnson Ranch, near

Corvallis, Mont................ 110

near Corvallis, Mont............... 110

o