UNITED STATES DEPARTMENT OF THE INTERIOR 

HAROLD L. ICKES, Secretary

GEOLOGICAL SURVEY

W. C. MENDENHALL, Direcl

Geological Survey

Water-Supply Paper Sg2 % 3 \ Q6

SURFACE WATER SUPPLY 

of the UNITED STATES

1941 n

* ^ C 

PART 12 ^ V>; :"

PACIFIC SLOPE BASINS IN W^IgNj^TON AND 

UPPER COLUMBIA

_____ a :>. c

cO C 

Prepared under the direction of CC v.

GLENN L. PARKER, Chief

AND OP T. R. NEWELL, A. H. TUTTLE, AND F. M. vWTC»^ District Engineers

^JUJ f.

In cooperation with the 

IDAHO, MONTANA, AND

and other agencies

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UNITED STATES ^ j* *£. 

GOVERNMENT PRINTING OFFICE 

WASHINGTON : 1942

For sale by the Superintendent of Documents, Washington, D. C. - - - Price 25 cents (paper cover)
CONTENTS

Page

Scope of work........................................................................ 1

Definition of terms.................................................................. 1

Explanation of data.................................................................. 1

Accuracy of field data and computed results.........................................'. 3

Publications......................................................................... 4

Records of discharge collected by agencies other than the Geological Survey.......... 9

Cooperation.....................:.................................................... 10

Division of work..................................................................... 10

Qaglng-statlon records............................................................... 11

Basins between Columbia River and Puget Sound...................................... 11

Naselle River Basin.............................................................. 11

Naselle River near Naselle, Wash............................................... 11

North River Basin................................................................ 12

North River near Raymond, Wash................................................. 12

Chehalls River Basin............................................................. 13

Cnehalls River near Doty, Wash................................................. 13

Chehalis River near Grand Mound, Wash.......................................... 14

Skookumchuck River near Centralia, Wash........................................ 15

Satsop River near Satsop, Wash................................................. 16

Wynoochee River at Oxbow, near Aberdeen, Wash.................................. 17

Qulnault River Basin............................................................. 18

Quinault River at Qulnault Lake, Wasn.......................................... 18

Queets River Basin............................................................... 19

Queets River near Clearwater, Wash............................................. 19

Clearwater River near Clearwater, Wash......................................... 20

Hoh River Basin.................................................................. 21

Hoh River near Spruce, Wash.................................................... 21

Qulllayute River Basin........................................................... 22

Soleduck River near Falrholm, Wash............................................. 22

Elwha River Basin................................................................ 23

Elwha River at McDonald Bridge, near Port Angeles, Wash........................ 23

Dungeness River Basin.......................................,...............*.... 24

Dungeness River near Sequlm, Wash.......................'....................... 24

Puget Sound Basins................................................................. 25

Dosewalllps River Basin.......................................................... 25

Dosewallips River near Brlnnon, Wash........................................... 25

Duckabush River Basin............................................................ 26

Duckabush River near Brlnnon, Wash............................................. 26

Skokomlsh River Basin............................................................ 27

North Fork of Skokomish River below Staircase Rapids, near Hoodsport, Wash..... 27

South Fork of Skokomlsh River near Union, Wash................................. 28

Nlsqually River Basin............................................................ 29

Nlsqually River near Alder, Wash............................................... 29

Little Nlsqually River near Alder," Wash........................................ 30

Mashel River near La Grande, Wash.............................................. 31

Puyallup River Basin............................................................. 32

Puyallup River near Ortlng, Wash................................................ 32

Puyallup River at Puyallup, Wash............................................... 36

Carbon River near Fairfax, Wash................................................ 38

White River at Qreenwater, Wash................................................ 39

White River near Buckley, wash................................................. 40

Greenwater River at Greenwater, Wash........................................... 41

Duwamlsh River Basin............................................................. 42

Green River near Palmer, Wash.................................................. 42

Green River near Black Diamond, Wash........................................... 43

Green River near Auburn, Wash.................................................. 44

Lake Washington Basin............................................................ 45

Cedar River at Cedar Falls, Wash............................................... 45

Cedar River near Landsberg, Wash............................................... 46

Sammamlsh Lake near Redmond, Wash.............................................. 47

Sanmamlsh River near Redmond, Wash............................................. 48

Sammamish River at Bothell, Wash............................................... 49

Snohomish River Basin............................................................ 50

South Fork of Skykomish River near Index, Wash................................. 50

Skykomlsh River near Gold Bar, Wash............................................ 51

Snohomish River at Snohomish, Wash............................................. 52

Troublesome Creek near Index, wash............................................. 53

Sultan River near Startup, Wash................................................ 54

Snoqualmle River near Tolt, Wash............................................... 55

North Fork of Snoqualmie River near SnoquaJjnie Falls, Wash..................... 56

Tolt River near Tolt, Wash..................................................... 57

Stillaguamish River Basin........................................................ 58

South Fork of Stillaguamish River near Granite Falls, Wash..................... 58

South Fork of Stillaguamish River above Jim Creek, near Arlington, Wash........ 59

Jim Creek near Arlington, Wash................................................. 60

North Fork of Stillaguamish River near Arlington, Wash......................... 61

Skaglt River Basin............................................................... 62

Skaglt River near Hope, British Columbia....................................... 62

Skaglt River above Devils Creek, near Newhalem, Wash........................... 63

III
IV CONTENTS

Gaging-station records Continued. 

Puget Sound Basins Continued.

Skagit River Basin Continued. Page

Skagit River at Newhalem, Wash................................................. 64

Skagit River near Concrete, Wash............................................... 65

Skagit River near Mount Vernon,-Wash............................................ 66

Reservoirs in Skagit River Basin............................................... 67

Beaver Creek near Newhalem, Wash............................................... 6S

Ruby Creek near Newhalem, Wash................................................. 70

Thunder Creek near Newhalem, Wash.............................................. 71

Stetattle Creek near Newhalem, Wash............................................ 72

Cascade River at Marblemount, Wash............................................. 73

Sauk River above Whitechuck River, near Darrington, Wash....................... 74

Sauk River near Sauk, Wash..................................................... 75

Suiattle River near Mansford, Wash............................................. 76

Whatoon Creek Basin.............................................................. 77

Whatcom Creek near Bellingham, Wash............................................ 77

Nooksack River Basin............................................................. 78

Nooksack River above Cascade Creek, near Glacier, Wash......................... 78

Nooksack River at Demlng, Wash................................................. 79

South Fork of Nooksack River near-Wickersham, Wash............................. SO

Upper Columbia River Basin......................................................... 81

Columbia River main stem......................................................... 81

Columbia River at Birchbank, British Columbia.................................. 81

Columbia River at international boundary....................................... S2

Columbia River at Kettle Falls, Wash........................................... 83

Columbia River Reservoir at Grand Coulee Dam, Wash............................. 84

Columbia River at Grand Coulee, Wash........................................... S7

Columbia River at Trinidad, Wash................................................ 88

Kootenai River Basin............................................................. 89

Kootenai River at Newgate, British Columbia.................................... 89

Kootenai River at Libby,' Mont.................................................. 90

Kootenai River at Leonia, Idaho................................................. 91

Kootenai River at Boom Camp, near Bonners Ferry, Idaho......................... 92

Kootenai River at Bonners Ferry, Idaho......................................... 93

Kootenai River near Bonners Ferry, Idaho....................................... 95

Kootenai River at Klockmann Ranch, near Bonners Ferry, Idaho................... 96

Kootenai River near Copeland, Idaho............................................ 97

Kootenai River at Port Hill, Idaho............................................. 99

Granite Creek near Llbby, Mont................................................. 101

Boulder Creek near Leonia, Idaho............................................... 102

Moyie River at Eastport, Idaho................................................. 103

Moyie River at Eil.een, Idaho .................................................. 104

Deep Creek at Moravia, Idaho................................................... 105

Long Canyon Creek near Port Hill, Idaho........................................ 106

Smith Creek near Port Hill, Idaho............................................... 107

Boundary Creek near Port Hill, Idaho........................................... 108

Pend Oreille River Basin......................................................... 109

Clark Fork above Mlssoula, Mont................................................ 109

Clark Fork below Missoula, Mont................................................ 110

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

Clark Fork near Plains, Mont................................................... 112

Clark Fork near Heron, Mont.................................................... 113

Pend Oreille Lake at Hope, Idaho............................................... 114

Pend Oreille River at Priest River, Idaho...................................... 115

Pend Oreille River below Z Canyon,near Metaline Falls, Wash ................... 116

Smaller reservoirs In Pend Oreilie River Basin, Mont........................... 117

Flint Creek near Southern Cross, Mont.......................................... 118

Flint Creek near Philipsburg, Mont............................................. 119

Flint Creek at Maxville, Mont.................................................. 120

Trout Creek near Philipsburg, Mont............................................. 121

Marshall Creek near Philipsburg, Mont.......................................... 122

Boulder Creek at Maxville, Mont................................................ 133

Middle Fork of Rock Creek near Philipsburg, Mont............................... 124

East Fork of Rock Creek near Philipsburg, Mont................................. 125

Blackfoot River near Helmville, Mont........................................... 126

Blackfoot River near Ovando, Mont.............................................. 127

Blackfoot River near Bonner, Mont.............................................. 128

Nevada Creek above reservoir, near Finn. Mont.................................. 129

West Fork of Bitterroot River near Conner, Mont................................ 130

Bitterroot River near Darby, Mont.............................................. 131

East Fork of Bitterroot River at Conner, Mont.................................. 132

Blodgett Creek near Hamilton, Mont............................................. 133

Willow Creek at Anfinson Ranch, near Corvallis, Mont........................... 134

Bear Creek near Victor, Mont................................................... 135

Burnt Fork Creek near Stevensvllle, Mont....................................... 136

Flathead River at Flathead, British Columbia................................... 137

Flathead River near Columbia Falls, Mont....................................... 138

Flathead River at Columbia Falls, Mont......................................... 139

Flathead River n^ar Kalispell, Mont............................................ 140

Flathead River at Demersville, near Kalispell, Mont............................ 141

Flathead River at Datnon Ranch, near Kalispell, Mont............................ 142

Flathead River at Therriault Ferry, near Kalispell, Mont....................... 143

Flathead River near Holt, Mont................................................. 144
CONTENTS v

Gaging-station records Continued. 

Upper Columbia River Basin Continued.

Fend Orellle River Basin Continued. Page

Flathead Lake at Soraers, Mont.................................................. 145

Flathead Lake at Poison, Mont.................................................. 146

Flathead River near Poison, Mont............................................... 147

Middle Fork of Flathead River at Essex, Mont................................... 148

Middle Fork of Flathead River near Belton, Mont................................ 149

South Fork of Flathead River near Columbia Falls, Mont......................... 150

Stillwater River near Whitefish, Mont.......................................... 151

Logan Creek at Tally Lake, near Whitefish, Mont................................ 152

Whitefish Creek near Kalispell, Mont........................................... 153

Ashley Creek near Kalispell, Mont.............................................. 154

Swan River near Big Fork, Mont................................................. 155

Priest Lake at outlet, near Coolin, Idaho...................................... 156

Priest River at outlet of Priest Lake, near Coolin, Idaho...................... 157

Priest River near Priest River, Idaho.......................................... 158

Salmon River near Waneta, British Columbia..................................... 159

Sheep Creek Basin................................................................ 160

Sheep Creek near Northport, Wash............................................... 160

Kettle River Basin............................................................... 161

Kettle River near Ferry, Wash.................................................. 161

Kettle River near Laurier, Wash................................................. 162

Myers Creek near Myncaster, British Columbia................................... 163

Colville River Basin.............................................................. 164

Colville River at Kettle Falls, Wash........................................... 164

Mill Creek near Colville, Wash................................................. 165

Spokane River Basin.............................................................. 166

Coeur d'Alene River at Enaville, Idaho......................................... 166

Coeur d'Alene River near Cataldo, Idaho........................................ 167

Coeur d'Alene Lake at Coeur d'Alene, Idaho..................................... 168

Spokane River at Post Falls, Idaho............................................. 169

Spokane River at Spokane, Wash................................................. 170

Spokane River at Long Lake, Wash............................................... 171

St. Joe River at Calder, Idaho................................................. 172

St. Maries River at Lotus, Idaho............................................... 173

Hayden Lake at Hayden Lake, Idaho.............................................. 174

Spokane Valley Farms Co.'s canal at Post Falls, Idaho.......................... 175

Okanogan River Basin............................................................. 176

Okanogan River at Okanogan Falls, British Columbia............................. 176

Osoyoos Lake near Oroville, Wash............................................... 177

Okanogan Ri ver near Tonasket, Wash............................................. 178

Slmilkameen River near Nighthawk, Wash......................................... 179

Methow River Basin............................................................... 180

Methow River at Twisp, Wash.................................................... 180

Chelan River Basin............................................................... 181

Stehekin River at Stehekin, Wash............................................... 181

Lake Chelan at Chelan, Wash.................................................... 182

Chelan River at Chelan, Wash................................................... 183

Railroad Creek at Lucerne, Wash................................................ 184

Wenatchee River Basin............................................................ 185

Wenatchee Lake near Plain, Wash................................................ 185

Wenatchee River below Wenatchee Lake, Wash..................................... 186

Wenatchee River at Plain, Wash................................................. 187

Wenatchee River at Peshastin, Wash............................................. 188

Chiwawa River near Plain, Wash................................................. 139

Icicle Creek above Snow Creek, near Leavenworth, Wash.......................... 190

Yakiraa River Basin............................................................... 191

Yakima River near Martin, Wash................................................. 191

Yakima River at Cle Elum, Wash................................................. 192

Yakima River at Umtanum, Wash.................................................. 193

Yakima River near Parker, Wash................................................. 194

Yakima River at Kiona, Wash.................................................... 195

Reservoirs in Yakima River Basin............................................... 196

Kachess River near Easton, Wash................................................ 197

Cle Elum River near Roslyn, Wash............................................... 198

Naches River below Tieton River, near Naches, Wash........................ .... 199

Bumping River near Nile, Wash.................................................. 200

American River near Nile, Wash................................................. 201

Tieton River at Tftton Dam, near Naches, Wash.................................. 202

Tieton River at headworks of Tieton Canal, near Naches, Wash................... 203

North Fork of Ahtanum Creek near Tampico, Wash................................. 204

South Fork of Ahtanum Creek at Conrad Ranch, near Tampico, Wash................ 205

Miscellaneous discharge measurements................................................. 206

Index................................................................................ 211

ILLUSTRATIONS

Page 

Plate 1. Gaging-station structures: A, Puyallup River at Puyallup, Wash.;

B, Columbia River at Grand Coulee, Wash.................................. 2
SURFACE WATER SUPPLY OF PACIFIC SLOPE BASINS IN WASHINGTON AND UPPER COLUMBIA RIVER

BASIN, 1941

SCOPE OF WORK

This volume is one of a series of 14 reports presenting results of measurements of 

stage and flow made on streams, lakes, and reservoirs in the United States during the 

water year ending September 30, 1941. The work was begun in 1888 in connection with 

special studies relating to irrigation. Measurements of the flow of streams and of the 

stage and contents of lakes and reservoirs have been made at about 9,120 gaging stations 

in the United States and also at many gaging stations in Alaska and Hawaii. In July 1941, 

4,850 gaging stations were being maintained by the Geological Survey and cooperating organizations. Miscellaneous discharge measurements were made at many other points.

In the execution of the work many State and private organizations have cooperated, 

either by furnishing data or by assisting in collecting data. Cooperation of the first 

kind is acknowledged in connection with the description of each station affected; cooperation of the second kind is acknowledged on page 10.

DEFINITION OF TERMS

The units in which stream-flow data are presented in this report and other terms used 

herein are defined as follows:

"Second-feet" is an abbreviation for "cubic feet per second." A second-foot is the 

rate of discharge of a stream whose channel is 1 square foot In cross-sectional area and 

whose average velocity Is 1 foot per second.

"Second-feet per square mile" is the average number of cubic feet of water flowing per. 

second from each square mile of area drained, on the assumption that the runoff is distributed uniformly both as regards time and area.

"Runoff in inches" is the depth to which an area would be covered if all the water 

draining from it in a given period were uniformly distributed on its surface. It is used 

for comparing runoff with rainfall, which Is usually expressed in inches.

An "acre-foot" is the quantity of water required to cover an acre to the depth of 1 

foot and is equivalent to 43,560 cubic feet. The term is commonly used In connection with 

storage for irrigation.

"Second-foot-day" is the volume of water represented by a flow of 1 second-foot for 24 

hours. It is equivalent to 86,400 cubic feet, 1.983471 acre-feet, or 646,317 gallons and 

represents a runoff of 0.0372 inch from 1 square mile.

"Stage-discharge relation" Is an abbreviation for the term "relation between gage 

height and discharge."

"Control" is a term used to designate a feature downstream from the gage that determines 

the stage-discharge relation at the gage. This feature may be a natural section, a reach 

of the channel, or an artificial structure.

EXPLANATION OF DATA

The base data collected at gaging stations consist of records of stage, measurements of 

discharge, and general information used to supplement the records of stage and discharge

1
2 EXPLANATION OF DATA

measurements in determining the daily flow. The records of stage are obtained either from 

direct readings on a nonrecording gage or from a water-stage recorder that gives a continuous record of the fluctuations. Measurements of discharge are made with a current 

meter by the general methods outlined in standard textbooks on the measurement of river 

discharge. Typical structures in use at gaging stations are shown on plate 1.

Rating tables giving the discharge for any stage are prepared from the discharge measurements. The application of the daily mean gage height to these rating tables gives the 

daily mean discharge, from which the monthly and the yearly mean discharge are computed. 

If the stage-discharge relation Is subject to change because of frequent or continual 

change in the physical features that form the control, the daily mean discharge is 

determined by the "shifting-control method," in which correction factors based on individual discharge measurements are used in applying the gage heights to the rating tables.

At some gaging stations the stage-discharge relation is affected by backwater from 

reservoirs, tributary streams, or other sources, which necessitates the use of the "slope 

method" in which the slope or fall in a reach of the stream is a factor in the determination of discharge. Information requisite for determining the slope or fall is obtained 

by means of an auxiliary gage set at Some distance from the base gage. At sorae stations 

the stage-discharge relation is affected by changing stage, and for them the rate of 

change of stage is used as a factor in the determination of discharge.

At most gaging stations in the northern part of the United States and at some in the 

mountainous regions of other parts the stage-discharge relation is affected by ice during 

the winter, which makes it impossible to compute the discharge in the usual manner. Discharge for periods of ice effect is computed on the basis of the gage-height record and 

occasional winter discharge measurements, consideration being given to the available information on temperature and precipitation, notes by gage observers and engineers, and 

comparable records of discharge for stations in the same or nearby basins. The days 

included in the periods of ice effect and the days during the winter period on which discharge measurements were made are indicated in the table by symbols referring to footnotes.

For most of the gaging stations on streams in the area covered by this report the data 

presented comprise a description of the station, a table showing the daily discharge of 

the stream, and a table of monthly and yearly discharge and runoff. Skeleton rating 

tables are published for all stations except those at which the daily discharge for the 

greater part of the year was determined by the shifting-control method, the slope method, 

or other special methods.

The description of the station gives the type of gage, its latitude and longitude 

determined from the best available maps, and information in regard to diversions that 

decrease the flow at the gage, artificial regulation from pondage or storage, and the 

accuracy of the records. Under "Average discharge" is given the average discharge for the 

number of years indicated. It is given only for stations for which there are 10 or more 

complete years of record. Under "Extremes" are given the maximum discharge and gage 

height; the minimum discharge if there is little or no regulation; the minimum daily discharge if there is extensive regulation (also the minimum discharge if useful); and the 

minimum gage height (unless it is of no importance). Unless otherwise qualified, the 

maximum discharge corresponds to the crest stage, obtained by use of a water-stage
GEOLOGICAL SURVEY \Y ATER-STTPPLY PAPER 932 PLATE 1

A. PUYALLUP RIVEU AT PLYALLUP, WASH.

B. COLUMBIA RIVER AT GRAND COULEE, WASH.

GAGING-STATION STRUCTLRES.
EXPLANATION OF DATA 3

recorder or a nonrecording gage read at the time of the crest. Likewise the minimum discharge represents the lowest stage, unless otherwise qualified. Selected peak discharges 

with the times of their occurrence are given below the table of monthly discharge for some 

stations. This supplementary information is generally omitted for stations having drainage areas of less than 10 square miles or more than 10,000 square miles or if the peak 

discharges usually exceed the corresponding mean discharges for the day by less than 10 

percent.

For stations equipped with nonrecording gages, the table of daily discharge gives 

the discharge in second-feet corresponding to once-daily readings of the gage or the mean 

of twice-daily readings. For flashy floods the daily mean discharge Is determined from 

gage-height graphs based on gage readings made once or twice dally or oftener, as stated 

in the station description. For stations equipped with water-stage recorders, except those 

on streams subject to sudden or rapid fluctuation, the table gives the discharge corresponding to the daily mean gage height. For stations subject to such fluctuation the 

daily mean gage height may not indicate the true daily mean discharge, which must be ob,- 

tained by averaging the discharge for parts of the day or by using the discharge Integrator, an Instrument for obtaining the daily mean discharge from a continuous gage-height 

graph and containing as an essential element a curve representing the stage-discharge 

relation at the station.

In the table of monthly discharge the column headed "Second-foot-days" gives the sum 

for each month of the figures given in the table of daily discharge. The column headed 

"Maximum" gives the maximum daily discharge and not the momentary discharge when the 

water surface was at crest stage. Likewise, in the column headed "Minimum" the quantity 

given is the minimum daily discharge. The column headed "Mean" gives the average flow 

In cubic feet per second during the month.

For most gaging stations on lakes and reservoirs the data presented comprise a description of the station and a monthly summary table of stage and contents. For a few of the 

more important lakes and reservoirs a table showing daily contents Is given. A skeleton 

table of capacity at given stages is usually given in the first report in which data for 

a station are published but Is omitted from succeeding reports.

ACCURACY OF FIELD DATA AND COMPUTED RESULTS

The accuracy of stream-flow data depends primarily on (1) the permanency of the stagedischarge relation and (2) the accuracy of observations of stage, measurements of flow, and 

interpretation of records.

The station description gives a statement In regard to the general accuracy of the 

records. "Excellent" indicates that, in general, the daily records are accurate within 

5 percent; "good," within 10 percent; "fair," within 15 percent; and "poor," within 20 or 

a higher percent.

Yield at some stations as indicated by monthly means may vary widely from natural yield, 

owing to diversion, consumption, regulation by storage, increase or decrease in evaporation-due to artificial causes, or other factors. For such stations figures of "secondfeet per square mile" and "runoff in inches" are not published unless storage or diversion 

records are included indicating the extent of the regulation or diversion or unless
4 ACCURACY OF FIELD DATA AND COMPUTED RESULTS

satisfactory adjustments can be made for changes in contents of reservoirs or for other 

changes Incident to use and control. Figures of second-feet per square mile and runoff 

in Inches are also omitted if the drainage area includes large noncontributing areas or 

if the average annual rainfall over the drainage area is less than 20 inches.

Many gaging stations on streams in the irrigated areas of the United States are situated above «ost 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.

The table of monthly discharge presents in summary the distribution of the flow past 

the station. The table of daily discharge affords opportunity for more detailed studies 

of the variation in flow. As further observations in each succeeding year may be expected 

to throw new light on data previously published, it should be borne in mind that such data 

are subject to revision in succeeding water-supply papers.

PUBLICATIONS

The results of stream-flow measurements are now published annually in 14 parts, each 

part covering an area whose boundaries coincide witH natural drainage features as Indicated 

below:

Part 1. North Atlantic slope basins (St. John River to York River).

2. South Atlantic slope and eastern Gulf of Mexico basins (James River to 

	Mississippi River).

3. Ohio River Basin.

4. St. Lawrence River Basin.

5. Hudson Bay and upper Mississippi River Basins.

6. Missouri River Basin.

7. Lower Mississippi River Basin.

8. Western Gulf of Mexico basins.

9. Colorado River Basin.

10. The Great Basin.

11. Pacific slope basins in California.

12. Pacific slope basins in Washington and upper Columbia River Basin.

13. Snake River Basin.

14. Pacific slope basins in Oregon and lower Columbia River Basin.

Water-supply papers and other publications of the Geological Survey containing data on 

the water resources of the United States may be obtained or consulted as explained below.

1. Copies may be purchased at nominal cost from the Superintendent of Documents, 

Sovernment Printing Office, Washington, D-. C., who will, on application, furnish lists 

giving prices.

2. Sets of the reports may be consulted in the libraries of the principal cities in 

the United States.

3. Sets are available for consultation in the local offices of the water-resources 

branch of the Geological Survey as follows:

East of the Mississippi River:

Albany, N. Y., 526 Federal Building.

Asiieville, N. C., 220 Post Office Building.

Atlanta, Ga., 5 North Rhodes Center.

Augusta, Maine, Statehouse.

Baton Rouge, La., 124 Geology Building, Louisiana State University.

Boston, Mass., 945 Post Office Building.

Charleston, W. Va., 408 Union Building.

Charlottesvllie, Va., House G, Dawson Row, University of Virginia.

Chattanooga, Term., 442 Post Office Building.

College Park, Md., Engineering Building, University of Maryland.

Columbia, S. C., 119 United States Courthouse.

Columbus, Ohio, 404 Engineering Experiment Station, Ohio State University.

Harrlsburg, Pa., 490 Education Building.

Hartford, Conn., 225 Capitol Building, 410 Asylum Street.

Indianapolis, Ind., 511 Board of Trade Building.

Jackson, Miss., 208 Millsaps Building.
PUBLICATIONS

Oklahoma City, Okla.

Louisville, Ky., 652. Federal Building.

Madison, Wis., 666 State Office Building.

Montgomery, Ala., 507 Post Office Building.

Ocala, Fla., 302 Post Office Building.

St. Paul, Minn., 808 New Post Office Building.

Trenton, N. J., 228 Federal Building.

Urbana, 111., 14 Post Office Annex, Elm Street.

West of the Mississippi River:

Austin, Tex., 302 West 15th Street.

Boise, Irtaho, 429 Federal Building.

Denver, Colo., 230 Customhouse.

Fort Smith, Ark., 6 Post Office Building.

Helena, Mont., 408 Federal Building.

Honolulu, Hawaii, 225 Federal Building.

Idaho Falls, Idaho, 2C4 Federal Building.

Iowa City, Iowa, 508 Hydraulic Laboratory, University of Iowa.

K?uSt2i States Post Office and Courthouse. 

, 303 Capitol Office Building.

^logical6 survey^hding, Missouri School of Mines 

and Metallurgy.

St. Louis, Mo., 926 New Federal Building. 

Salt Lake City, Utah, 303 Federal Building. 

San Francisco, Calif., 625 Market Street Building. 

Santa Fe, N. Mex., 204 United States Courthouse. 

Tacoraa, Wash., 1100 Washington Building. 

Topeka, Kans., 305 Federal Building. 

Tucson, A-iz., 210 Post Office Building.

A list of the Geological Survey publications may be obtained by applying to the 

Director, Geological Survey, Washington, D. C.

Records of flow of streams In the United States have been published in the reports 

tabulated as follows:

Stream-flow data In reports of the Geological Survey 

(A - Annual Report; B . Bulletin; W - Water-Supply Paper)

Report

14th A 

B 1

pt. 2 

pt; 2 

pt. 2 

pt. 3 

pt. 2

W 11.........

18th A, pt. 4

19th A, pt. 4 

W 27.........

20th A, pt. 4 

W 35 to 39...

21st A, pt. 4 

W 47 to 52...

22d A, pt. 4 

W 65, 66.....

W 75.........

Character of data

Descriptive information only.

Monthly discharge and descriptive information.

....do........................................

.do.

Monthly discharge (long-time records, 1871-93).. 

Descriptions, measurements, gage heights, and

ratings.

Descriptive information only. 

Descriptions, measurements, gage heights,

ratings, and monthly discharge (also many data

covering earlier years). 

Gage heights (also gage heights for earlier

years). 

Descriptions, measurements, ratings, and monthly

discharge (also similar data for some earlier

years). 

Descriptions, measurements, and gage heights of

streams east of the Mississippi River and

Missouri River and tributaries above Kansas

River. 

Descriptions, measurements, and gage heights of

streams west of the Mississippi River except

Missouri River and tributaries above Kansas

River. 

Descriptions, measurements, ratings, and monthly

discharge (also some long-time records). 

Measurements, ratings, and gage heights of

streams east of the Mississippi River and

Missouri River and tributaries. 

Measurements, ratings, and gage heights of

streams west of the Mississippi River except

Missouri River and tributaries. 

Monthly discharge (also for many earlier years). 

Descriptions, measurements, gage heights, and

ratings. 

Monthly discharge...............................

Descriptions, measurements, gage heights, and

ratings. 

Monthly discharge...............................

Descriptions, measurements, gage heights, and

ratings. 

Monthly discharge...............................

1S84 to Sept. 1890 

1884 to June 30, 1891. 

18S4 to Dec. 31, 1892. 

1888 to Dec. 31, 1S93. 

1893-94.

1896. 

1895-96.

1898.

1899.

1S99. 

1900.

1900.

1901.

1901.

Note.- Reports containing records for years after 1901 are given in table on page 6.

The table on the following page gives, by years and drainage basins, the numbers of 

the papers on surface water supply published from 1899 to 1941. The data for any particular station will, in general, be found in the reports covering the years during
Numbers of water-supply papers containing results of stream 

(For basins Included see p. 4)

Year

1899 a... 

1900 g... 

1901 ..... 

1902..... 

1903.....

1904..... 

1905..... 

1906..... 

1907-8... 

1909 .....

1910..... 

1911..... 

1912 .....

1914.....

1915..... 

1916..... 

1917..... 

1918..... 

1919-20..

1921.. .. . 

1922..... 

1923 ..... 

1924..... 

1925.....

1926..... 

1927..... 

1928..... 

1929..... 

1930.....

1931.....

1933 ..... 

1934..... 

1935.....

1936..... 

1937..... 

1938..... 

1939 ..... 

1940..... 

1941.....

1

35 

47, h48 

65, 75 

82 

97

0124, p!25, q!26 

0165, p!66, q!67 

0201, p202, q203 

241 

261

281 

301 

321

381

401 

431 

451 

471 

501

541 

561 

581 

601

621- 

641 

661

681 

696

711

741 

756 

781

801 

821 

851 

871 

891 

921

2

035, -36 

48 

65, 75 

b82, 83 

b97. 98

q!26, 127 

q!67, 168 

0203, 204 

242 

262

282 

302 

322 

352

382

402 

432 

452 

472 

502

542 

562 

582 

602

622 

642 

662 

682 

697

712

742 

757 

782

802 

822 

852 

872 

892 

982

3

36 

48, 149 

65, 75 

83 

98

128 

169 

205 

243 

263

283 

303 

323

383

403 

433 

453 

473 

503

543 

563 

583 

603

623 

643 

663 

683 

698

713

743 

758 

783

803 

823 

853 

873 

893 

923

4

36 

49 

65, 75 

m82, 83 

97

129 

170 

206 

244 

264

284 

304 

324

384

404 

434 

454 

474 

504

544 

564 

584 

604

624 

644 

664 

684 

699

714

744 

759 

784

804 

824 

854 

874 

B9.4 

924

5

36 

49 

k65, 66, 75 

k83, 85 

k98. 99. nlOO

k!28, 130 

171 

207 

245 

265

285 

305

325

385

405 

435 

455 

475 

505

525 

545 

565 

585 

605

625 

645 

665 

685 

700

715

745 

760

785

805 

825 

855 

875 

895 

925

6

036, 37 

49, J50 

66, 75 

84 

99

130, r!31 

172 

208 

246 

266

286 

306 

326

386

406 

436 

456 

476 

506

526 

546 

566 

586 

606

626 

646 

666 

686 

701

716

746 

761 

786

806 

826 

856 

876 

896 

926

7

37 

50 

k65, 66, 75 

k83, 84 

k98. 99

k!28, 131 

k!69, 173 

k205, 209 

247 

267

287 

307 

327

387

407 

437 

457 

477 

507

527 

547 

567 

587 

607

627 

647 

667 

687 

702

717

747 

762 

787

807 

827 

857 

877 

897 

927

6

a Rating tables and Index to Water-Supply Papers 35-39contained In Water-Supply 

Paper 39. Tables of monthly discharge for 1899 In 21st Annual Repoij£, part 4.

b James River only.

c Gallatin River.

d Green and Gunnlson Rivers and Colorado River above Gunnlson River.

e M9Jave River only.

f Kings and Kern Rivers and south Pacific slope basins.

g Rating tables and index to Water-Supply Papers 47-52 and data on precipitation, 

wells, and irrigation in California and Utah contained In Water-Supply Paper 52. 

Monthly discharge for 1900 in 22d Annual Report, part 4.

h Wissahlckon and Schuylkill Rivers to James River.

i Scioto River.

j Loup

k Trib

m Lake 

n Huds

o New 

p Huds

q Susq

r Plat

s The 

Basins.

t Belo

u Rogu
PUBLICATIONS

which the station was maintained. For example, the data for 1910 to 1920 for any station 

in the area covered by part 3 are published In Water-Supply Papers 283, 303, 323, 353, 

403, 433, 453, 473, 503, which contain records for the Ohio River Basin for those years.

The records at most of the stations discussed In these reports extend over a series of 

years. Miscellaneous measurements at many points other than regular gaging stations have 

been made each year and are published under "Miscellaneous discharge measurements" at the 

end of each report, the streams and points of measurement listed appearing In the same 

relative order as the streams and gaging stations In the body of the report. An Index of 

the records obtained prior to 1904 has been published In Water-Supply Paper 119.

Each of the reports on surface water supply for the year 1939, Issued as Water-Supply 

Papers 871 to 884 (see table on p. 6 ), contains a summary of yearly discharge at gaging 

stations in the area covered by that report. Gaging stations at which 10 or more complete years of record have been collected are represented. These summaries are available 

also as separate reprints.

From time to time reports have been published that are compilations of records for 

various.areas, usually a single State or drainage basin. These reports contain records 

previously published (some of which have been revised), as well as some records not contained In the annual series of water-supply papers. The following table gives the numbers and titles of these reports, arranged In alphabetical order by States and drainage 

basins.

Reports containing compilation of discharge by States and drainage basins

Water-Supply 

Paper

107

298

299

300

447

597-B

636-D

636-B

637-A

74

197

415

230

370

sso

424

492

S70

469

395

617

517

618

198

491

536

279

192

sea

491

109

Year 

ending

1903

1912

1912

1912

1918

1927

1927

1927

1927

1900

1905

1915

1906

1910

1937

1916

1919

1935

1921

1914

1927

1920

1926

1906

1917

1920

1909

1906

1913

1917

1904

State or drainage basin and title

STATE

Alabama, Water powers of, with an appendix on stream measurements

in Mississippi.

California, Water resources of, part 1, Stream measurements in

Sacramento River Basin.

California, Water resources of, part 2, Stream measurements in

San Joaquin River Basin.

California, Water resources of, part 3, Stream measurements in

the Great Basin and Pacific coast river basins.

California, southern, Surface water supply of Pacific slope of.

California, Surface water supply of Sacramento River Baa in.

California, Surface water supply of San Joaquin River Basin.

California, southern. Surface water supply of Pacific slope

basins in.

California, Surface water supply of minor San Francisco Bay,

northern Pacific, and Great basins in.

Colorado, Water resources of.

Georgia, Water resources of.

Massachusetts, Surface waters of.

Nebraska, Surface water supply of.

Oregon, Surface water supply of.

Texas, Summary of records of surface waters of.

Vermont, Surface waters of.

Washington, Summary of hydrometric data in.

Washington, Summary of records of surface waters of.

Wyoming, Surface waters of, and their utilization.

DRAINAGE BASIN

Colorado River (Ariz., Colo., H. Hex., Utah, Wyo.) and its

utilization.

Colorado River, upper (Colo., Utah), and its utilization.

Great Salt Lake Basin, Water powers of.

Green River (Utah, Wyo.) and its utilization.

Kennebec River- Basin (Haine), Water resources of.

Milk River. (See St. Mary and Milk Rivers.)

Hew-Kanawha River Basin (H. C., Va., W. Va.), Surface Water

Supply of.

Penobscot River Basin (Maine), Water resources of.

Potomao River Basin (D. C., Md., W. 7a.)

Rio Grande Basin (Colo., H. Mex. , Tex.), Water resources of, 1S88-

1913.

St. Mary and Milk Rivers (Mont., Canada), Water supply of.

Susquehanna River Basin (Pa., Md.,), Hydrography of.

Records of discharge have been published also In State reports. Some of these are 

not contained In the publications of the Geological Survey or are revisions of records 

previously published in Its water-supply papers. The table on following page contains a 

list of these reports.
PUBLICATIONS

State reports containing compilation of records of discharge

State

Alabama..... 

Arkansas.... 

Connecticut.

Georgia. ....

Illinois....

Indiana .....

Kentucky. . . . 

Maryland. ...

Minnesota. .. 

Missouri. ...

Nebraska. ...

New Jersey. .

New Mexico. . 

North Carolina.

North Dakota

Pennsylvania

Tennessee...

Virginia.... 

Washington. . 

Wisconsin...

Year 

ending

1915 

1928 

1926

1953*

1906 

1920° 

1911 

1934 

1927

1930"

1932 

1919 1924d 

19286

1935f 

19398 

1920 

1937

1912 

1926 

1939n 

1914

1928 1 

1928

19343

1925 

1923

1936* 

1920

19271 

1921 

1939n

1914 

1924° 

1930P 

1936<1 

1911 

1932r 

1924 

1930s

1905 

1910 

1916 

1927

1933 

1914

1923fc

Report

Bull,. 17, Water powers of Alabama....

Bull. 44, Water resources of

Connecticut.

Bull. 16, Water powers of Georgia.... 

Bull. 38, Water powers of Oeorgla.... 

Water resources of Illinois. ......... 

Stream-flow data of Illinois ......... 

Pub. 72, Surface water supply of 

Indiana. 

Pub. 112, Surface water supply of 

Indiana.

Surface waters of Kansas .............

Surface waters of Kentucky. .......... 

Plow data and draft storage curves 

for major streams In Maryland.

Water-resources Investigation of 

Minnesota. 

Vol. 20, 2d series, Water resources 

of Missouri. 

Vol. 26, 2d series, Surface waters 

of Missouri.

Bull. 33, Surface water supply of 

New Jersey. _ 

Special Report 5, Surface water 

supply of Hew Jersey. 

Surface water supply of Hew Mexico... 

Bull. 34, Discharge records of North 

Carolina streams. 

Bull. 39, Discharge records of North 

Carolina streams. 

Report to Governor of North Dakota 

on flood control. 

Surface water in Horth Dakota. .......

Bull. 200, Compilation of stream-flow 

records of Ohio.

Bull. 4, Water resources of the State 

of Oregon. 

Bull. 7, Water resources of the State 

of Oregon. 

Bull. 8, Water resources of the State 

of Oregon. 

Bull. 9, Water resources of the State 

of Oregon. 

Report of the Water Supply Commission 

of Pennsylvania. 

Stream-flow records of Pennsylvania..

Bull. 34, Water resources of 

Tennessee. 

Bull. 40, Surface waters of 

Tennessee. 

5th biennial report, State Engineer. . 

7th biennial report, State Engineer. . 

10th biennial report, State Engineer. 

Bull. 31, Water resources of 

Virginia. 

Bull. 5, Monthly and yearly summaries 

of hydroinetrlc data. 

1st report of Railroad Commission of 

Wisconsin to Legislature on water 

powers . 

2d report of Railroad Commission of 

Wisconsin to Legislature on water 

powers.

Issued by

Geological Survey of Alabama. 

Arkansas Geological Survey. 

State Geological and Natural 

History Survey. 

Connecticut State Water 

Commission. 

Geological Survey of Georgia. 

Do. 

Rivers and Lakes Commission. 

Division of Waterways. 

Department of Conservation.

Do.

Iowa State Planning Board. 

Kansas Water Commission. 

Do. 

Kansas State' Board of 

Agriculture. 

Do. 

Do. 

Kentucky Oeologlcal Survey. 

State Planning Commission 

and Water Resources Commission. 

State Drainage Commission.

Missouri Geological Survey 

and Water Resources. 

Do.

Bureau of Water Power, Irrigation, and Drainage. 

Do. 

Department of Conservation 

and Development. 

State Water Policy

Office of the State Engineer. 

Department of Conservation 

and Development. 

Do.

State chief engineer.

State Planning Board. 

Engineering Experiment Station, Ohio State University. 

Department of Agriculture, 

Division of Conservation 

and natural Resources. 

Office of the State Engineer.

Do. 

Do. 

Do.

Water Supply Commission of 

Pennsylvania. 

Department of Forests and 

Waters . 

Department of Education.

Do.

Office of the State Engineer. 

Do. 

Do. 

Conservation Commission.

Department of Conservation 

and Development. 

Railroad Commission of 

Wisconsin.

Do.

a Includes records of monthly discharge k Includes records for years 1889-1936; 

in second-feet per square mile for records of dally and monthly disyears 1912-33. charge are not Included, 

b Includes records for years 1907-18. 1 includes records for years 1882-1937. 

c Includes records for years 1927-30. m Includes all available records prior to 1921 

d Includes records for years 1919-24. n Includes records for years 1902-39. 

e Includes records for years 1924-28. o Includes records for years 1914-24. 

f Includes records for years 1928-35. p includes records for years 1924-30. 

g Includes records for years 1935-39. q includes records for years 1930-36. 

h Includes records for years 1927-39. r Includes records for years 1928-32. 

i Includes records for years 1914-28. 3 includes average weekly discharge for years 

j Includes records for years 1928-34. 1920-30. 

't Includes records for years 1914-23.

Note.- In addition to the records contained in the reports listed above, the following 

States have Issued annual or biennial reports in which are contained records of discharge:

California, Colorado, Connecticut, Idaho, Indiana, Missouri, Montana, Nebraska, New Mexico, 

New York (also New York City Board of Water Supply), North Dakota, Oregon, Pennsylvania, 

Nevada, Washington, and Wyoming.
PUBLICATIONS 9

The reports listed In the foregoing tables contain the customary records of discharge 

collected during the systematic operation of gaging stations. Detailed information on 

the stage and discharge of many streams during major floods has been Included in special 

reports on these floods published by the Geological Survey. The more recent of these 

reports also contain other pertinent hydrologic Information and analyses and compilations 

of data relating to earlier noteworthy floods. _The following list gives the numbers and 

titles of these reports.

Water-Supply Title 

Paper

88 The Passaic flood of 1902.

92 The Passaic flood of 1903.

96 Destructive floods in the United States In 1903.

147 Destructive floods In the United States in 1904.

162 Destructive floods in the United States in 1905.

334 The Ohio Valley flood of March-April 1913.

426 Southern California floods of January 1916.

487 The Arkansas River flood of June 3-5, 1921.

488 The floods in central Texas in September 1921.

520-G Some floods in the Rocky Mountain region.

636-C The New England flood of November 1927.

771 Floods in the United States, magnitude and frequency.

773-E The New York State flood of July 1935.

796-B Flood on Republican and Kansas Rivers, May and June 1935.

796-C Flood in La Canada Valley, Calif., January 1, 1934.

796-G Major Texas floods of 1935.

798 The floods of March 1936, Part 1, New England Rivers.

799 The floods of March 1936, Part 2, Hudson River to Susquehanna River region.

800 The floods of March 1936, Part 3, Potomac, James, and upper Ohio Rivers.

816 Major Texas floods of 1936.

836-A Stages and flood discharges of the Connecticut River at Hartford, Conn.

838 Floods of Ohio and Mississippi Rivers, January-February 1937.

842 Floods in Canadian and Pecos River Basins of New Mexico, May and June 1937.

843 Floods of December 1937 in northern California.

844 Floods of March 1938 in southern California.

847 Maximum discharges at stream-measurement stations through Septenber 1938.

867 Hurricane floods of September 1938.

869 Flood of August 1935 in Muskingum River Basin, Ohio.

RECORDS OF DISCHARGE COLLECTED BY AGENCIES OTHER THAN THE GEOLOGICAL SURVEY

The following table contains a list of gaging stations for the area covered by this report at which records of daily discharge were collected during the water year October 1940 

to September 1941 by -agencies other than the Geological Survey. The records for these 

stations are not contained in the publications of the Geological Survey except as noted.

Records of discharge collected by agencies other than -the Geological Survey

Stream Location Period Collected by Remarks

Reservation drain Alfalfa, Wash........... 1912-41 Office of Indian Affairs -(-Unpublished

since 1923. 

Satus Creek...... Downstrerjn from Dry 1913-41 ... .do.................. -(-Unpublished

Creek, near Toppenish, since 1924. 

Wash. 

Do............ Near Satus, wash........ 1932-41 ....do.................. Unpublished.

Toppenish Creek.. Near Fort Simcoe, Wash.. 1909-41 ....do.................. tUnpublished

since 1924. 

Do............ Near Alfalfa, Wash.:.... 1932-41 ....do.................. Unpublished.

t Records for earlier years published in water-supply papers of the Geological Survey.

Note.- Records of daily discharge for many canals and drains In Washington for 1939 and 

earlier years have been collected by the Bureau of Reclamation and the Office of Indian 

Affairs in connection with irrigation and drainage projects. These records have not been 

published. The Soil Conservation Service began in 1932 to make studies of runoff from 

one area of 762 acres and three areas of less than 70 acres each in the vicinity of 

Pullman, Wash., and in 1939 from one area of 19.2 acres in the vicinity of Dayton, Wash. 

The records are in the files of that organization.
10 COOPERATION

The work in the several States was done under cooperative agreements with the organizations listed below:

Idaho: State Department of Reclamation, James Spofford, commissioner, succeeded 

by E. V. Berg.

Montana: Office of State engineer, E. B. Donohue; State Water Conservation 

Board.

Washington: Department of Conservation and Development, John Brooke Fink, 

director, succeeded by Ed Davis, and C. J. Bartholet, supervisor of hydraulics, 

division of water resources; cities of Aberdeen, Bellingham, Everett, Seattle, and 

Tacoma; King and Pierce Counties, through the Intercounty River Improvement Commission; and Skaglt and Whatcom Counties.

Financial assistance was furnished by the Corps of Engineers, United States Army, for 

the operation of one gaging station in Idaho, five in Montana, and ten in Washington.

Acknowledgment of financial assistance in collecting records published herein is due 

also to the United States Department of State; Bureau of Reclamation and Office of 

Indian Affairs, United States Department of the Interior; Forest Service and Soil Conservation Service, United States Department of Agriculture; Weather Bureau, United States 

Department of Conmerce; and the Federal Power Commission.

Full cooperation exists between this organization and the Dominion Water and Power 

Bureau, Department of Mines and Resources, Canada. On waters adjacent to the international 

boundary certain stations are maintained Jointly by the United States and Canada under the 

terms of the Boundary Waters Treaty of 1909, and others are maintained under a subsequent 

agreement between the two Governments. The records from all these stations are obtained 

In such a manner as to be equally acceptable and available In either country. Tnese stations are herein designated "international gaging stations."

Assistance in collecting the records was also rendered by the following municipalities, 

corporations, and individuals:

Idaho: Washington Water Power Co.

Montana: Montana Power Co. and Glacier Silver Lead Mining Co. 

Washington: Crown Zellerbach Corporation; Hugh L. Cooper Co.; Puget Sound Power 

& Light Co.; Washington Water Power Co.; and Western Washington Electric Light & 

Power Co.

DIVISION OF WORK

The stream-gaging work was conducted by the water resources branch of the Geological 

Survey, Glenn L. Parker, chief hydraulic engineer, Carl G. Paulsen, assistant chief 

hydraulic engineer, and Rudolph G. Kasel, chief of the division of surface waters. The 

data for the stations in the several States were collected and prepared for publication 

under supervision of district engineers as follows: In Idaho (except for Pend Oreille 

River at Priest River) and for Clark Fork near Heron, Mont., Flathead River at Flathead, 

British Columbia, and Kootenai River near Rexford, Mont., T. R. Newell; in Montana (except 

for the two stations noted above), A. H. Tuttle; in Washington and for Pend Oreille River 

at Priest River, Idaho, F. M. Veatch.

The records were reviewed and the manuscript prepared for publication under the di 

rection of B. J. Peterson, engineer in charge, and M. C. Boyer, associate engineer, 

section of reports.
GAGING-STATION RECORDS 11

Basins between Columbia River and Puget Sound

NASELLE RIVER BASIN 

Naselle River near Naselle, Wash.

Location.- Staff gage, lat. 46°22'25", long. 123°44'45" (revised), in SWi sec. 1, T. 

10 N., R. 9 W., 1& miles upstream from Salmon Creek and 3& miles east of-Naselle.

Drainage area.- 55 square miles (revised). 

Records available.- May 1929 to September 1941. 

Average discharge.- 12 years, 423 second-feet.

Extremes.- Maximum discharge during year, 4,360 second-feet Jan. 17 (gage height, 9.74 

reet, from graph based on gage readings); minimum observed, 31 second->feet Aug. 19, 20, 

21 (gage height, 2.02 feet).

1929-41: Maximum discharge observed, 10,400 second-feet Jan. 22, 1935 (gage 

height, 15.9 feet, from floodmarks), from rating curve extended above 3,000 secondfeet; minimum observed, 22 second-feet Oct. 6, 7, 1929; minimum gage height observed, 

1.72 feet Aug. 29, 1935.

Recarks.- Records good. Gage read twice daily. No diversion or regulation.

Rating tables, water year 194O-41 (gage height, in feet, and discharge, in second-feet) 

(Shifting-control method used Oct. 24 to Nov. 28)

2.1 45

2.2 62

2.4 104

2.6 152

2.8 205

3.0 265

3.5 440

4.0 650

2.2 59

2.4 99

2.6 147

2.8 202

Oct. 11 to Sept. 30

3.0 263

3.5 439

4.0 651

5.0 1,160

6.0 1,760

7.0 2,410

8.0 3,110

Discharge, in second feet, water year October 194u to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

39

44

47

72

55

48

45

42

44

833

626

280

3S2

280

217

188

188

188

376

2,020

1,540

792

744

891

562

500

401

382

401

850

995

Nov.

995

891

697

562

479

420

697

651

606

520

479

401

364

312

296

263

248

232

202

232

232

202 isa

263

296

248

382

1,080

1,630

995

~

Dec.

697

562

697

562

697

697

606

562

520

459

401

364

329

296

280

263

248

312

732

1,270

942

697

651

651

697

995

9*2

7*£

697

606

541

Jan.

479

420

382

329

346

382

382

346

312

296

280

263

263

248

312

364

2,670

2,560

1,270

841

651

520

439

520

1,270

995

792

606

500

439

651

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

697

744

651

541

459

401

346

329

346

364

364

329

296

280

248

232

217

217

202

188

174

166

169

188

163

155

188

248

-

-

-

Secondfoot-days

14,072

15,063

18,765

146,906

20 128

8^902

6,008

4,169

8,546

3,319

1,678

1,460

9,388

111,498

Mar.

248

280

248

217

202

188

188

171

160

152

144

137

132

127

120

113

120

296

382

296

248

263

217

202

188

188

171

160

158

150

142

Maximum

2,020

1,630

1,270

3,490

2,670

744

382

248

1,630

158

78

152

651

2,670

Apr.

142

132

147

142

217

248

232

202

188

169

155

147

140

137

150

150

150

132

124

115

113

108

104

99

95

91

86

86

84

84

-

May

88

91

124

18S

248

202

174

152

140

130

120

115

110

110

106

539

1,630

841

562

439

364

312

263

232

217

202

188

188

169

152

150

Minimum

39

188

248

30

248

155

113

84

88

78

41

31

163

31

June

132

134

120

115

115

137

132

117

117

106

99

. 93

91

86

86

82

84

122

140

158

140

120

132

10S

106

101

91

91

S6

78

~

Mean

454

502

605

401

649

318

194

139

276 in

54.1

47.1

313

305

July

78

74

72

70

68

67

67

65

61

59

57

56

56

52

52

50

47

49

49

49

47

45

45

45

45

42

42

44

42

42

41

Per 

square 

mile

8.25

9.13

11.0

7 29«i

11 » S

5. 78

3.53

5. 02

2.02

.984

.85 £

5.69

5.55

Aug.

]

]

39

41

56

49

42

39

38

36

36

35

34

36

35

34

34

34

34

32

31

31

31

34

44

41

39

54

08

52

70

59

82

Sept.

217

248

357

651

401

296

217

174

174

527

520

346

346

346

296

329

329

329

459

420

364

312

280

248

232

202

188

174

163

243

-

Runoff

Inches

9.52

10.19

12.69

99.35

13.61

6.02

4.06

5 . 78

2. 24

1.13

eiss

75.40

Acre-feet

27,910

29,880

37,220

291,400

39

17)660

11,920

ie!950

6,580

3,330 

2 900

is! 620

221,200

461678 O-42-2
12 NORTH RIVER BASIN

North River near Raymond, Wash.

Location.- Water-stage recorder, lat. 46°49', long. 123°51', In sec. 6, T. 15 N., R. 9 

W., it miles upstream from Salmon Creek and 10 miles northwest of Raymond.,

Drainage area.- 219 square miles.

Records available.- August 1927 to September 1941.

Average discharge.- 14 years, 953 second-feet.

Extremes.- Maximum discharge during year, 5,440 second-feet Jan. 18 (gage height, 6.39 

reet;; minimum, 42 second-feet Aug. 20-22 (gage height, 1.26 feet).

1927-41: Maximum discharge, 35,000 second-feet Dec. 10, 1933 (gage height, 15.8 

feet, from floodmarks), from rating curve extended above 6,300 second-feet; minimum, 

24 second-feet Sept. 17, 1938 (gage height, 1.18 feet).

Remarks.- Records good. No diversion or regulation.

Rating table, water year 1940-41 (gage height, in feet, and discharge, In second-feet)

1.3 47 2.0 181 3.5 1,060 

1.4 61 2.3 277 4.0 1,600 

1.6 94 2.6 401 5.0 2,870 

1.8 132 3.0 635 6.0 4,600

Discharge, in second-feet, water year October 1940 to September

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

91 

86 

82 

92 

84

86 

82 

74 

84 

467

642 

596 

581 

530 

365

263 

236 

419 

633 

1,750

2,870 

1,780 

1,140 

1,060 

984

758 

601 

518 

446 

808 

1,300

Nov.

1,460 

1,580 

1,330 

1,140 

947

911 

994 

1,440 

1,720 

1,400

1,100 

920 

782 

734 

642

549 

490 

468 

436 

421

411 

401 

383 

421 

530

549 

601 

1,310 

2,730 

3,010

Dec.

1,960 

1,410 

1,340 

1,350 

1,330

1,450 

1,380 

1,290 

1,140 

974

850 

766 

688 

628 

587

543 

518 

536 

867 

2,080

2,140 

1,540 

1,370 

1,340 

1,460

1,720 

2,020 

2,080 

1,840 

1,600 

1,400

Jan.

1,200 

1,020 

902 

824 

790

841 

1,010 

1,050 

938 

841

758 

702 

680 

628 

642

766 

2,460 

5,010 

4,700 

2,670

1,840 

1,460 

1,190 

1,080 

1,540

2,140 

1,840 

1,450 

1,220 

1,090 

1,180

Feb.

1,320 

1,320 

1,200 

1,060 

938

850 

766 

688 

680 

680

742 

702 

642 

594 

555

518 

495 

462 

441 

426

406 

388 

378 

401 

436

431 

473 

621

»°nth fooTdays

Ooto 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 194C 

ary

ember .....................

19,508 

29,810 

40,197

25,334

44,462 

18,613 

15,062 

8,451 

16,086 

6,262 

2,608 

2,584 

11,237

ter year 1940-41 .......... 214,880

Mar.

750 

798 

742 

665 

594

549 

506 

473 

441 

416

388- 

370 

356 

336 

315

307 

304 

428 

734 

766

615 

561 

524 

468 

431

401 

388 

370 

352 

340 

374

Maximum

2,870 

3,010 

2,140

5,550

5,010 

1,320 

798 

462 

2,330 

307 

128 

263 

814

5,010

Apr.

340 

319 

327 

323 

344

416 

462 

406 

374 

348

323 

296 

281 

274 

281

296 

296 

266 

246 

232

223 

213 

207 

201 

198

193 

190 

190 

193 

193

May

187 

184 

198 

252 

331

416 

365 

296 

252 

223

204 

196 

198 

198 

196

609 

1,900 

2,330 

1,500 

1,050

816 

665 

549 

473 

416

378 

356 

356 

356 

336 

300

Minimum

74 

383 

518

44

628 

378 

304 

190 

184 

130 

60 

42 

201

42

June

307 

296 

281 

252 

239

252 

277 

281 

249 

232

220 

198 

181 

178 

168

165 

163 

178 

201 

236

220 

201 

196 

181 

176

163 

158 

146 

137 

130

Mean

629

994 

1,297

889

1.434 

665 

486 

282 

519 

209 

84.1 

83.4 

375

589

1941

July

128 

124 

118 

112 

108

107 

105 

103 

96 

394

391 

d89 

d86 

d84 

d81

79 

77 

75 

72 

72

71 

69 

67 

66 

66

64 

63 

61 

60 

60 

60

Per 

squa re 

mile

2.87 

4.54 

5.92

4.06

6.55 

3.04 

2.22 

1.29 

2.37 

.954 

.384 

.381 

1.71

2.69

Aug.

60 

61 

69 

77 

94

86 

74 

d70 

d67 

363

359 

d55 

d52 

48 

48

47 

46 

45 

43 

42

42 

42 

60 

61 

99

107 

133 

178 

263 

176 

217

Sept.

288 

401 

S14 

734 

710

468 

344 

270 

236 

319

411 

456 

360 

331 

344

370 

378 

383 

416 

451

431 

352 

311 

281 

256

239 

223 

213 

201 

246

Runoff

Inches

3.31 

5.06 

6.83

55.24

7.55 

3.16 

2.56 

1.44 

2.73 

1.06 

.44 

.44 

1.91

36.49

Acre-feet

38,690 

59,130 

79,730

645,200

88,190 

36,920 

29,880 

16,760 

31,910 

12,420 

5,170 

5,130 

22,290

426,200

d Doubtful gage-height record; discharge interpolated.
CHEHALIS RIVER BASIN 13 

Chehalls River near Doty, Wash.

Location.- Staff gage, lat. 46°37'00n , long. 123°16'40n (revised), In NWi sec. 14, T. 

13 N., R. 5 W., 1-fr miles upstream from Elk Creek, 1& miles south of Doty, and 3-fr 

miles north of Pe Ell.

Drainage area.- 113 square miles.

Records available.- October 1939 to September 1941.

Extremes.- Maximum discharge during year, 9,140 second-feet Jan. 17 or 18 (gage height, 

11.7 feet, from high-water mark on gage, noted by observer), minimum observed, 27 

second-feet Oct. 9 (gage height, 1.05 feet).

1939-41: Maximum discharge observed, 15,100 second-feet Dec. 15, 1939 (gage 

height, 15.76 feet); minimum observed, 22 second-feet Aug. 18, 19, 20, 21, 26, 1940 

(gage height, 0.99 foot); discharge may have been less during period Oct. 1-3, 1939, 

before gage was Installed.

Remarks.- Records good. Gage read twice daily. No diversion or regulation.

Rating table, water year 1940-41 (gage height. In feet, and discharge. In second-feet)

1.1 31 2.0 235 4.0 1,380 8.0 4,650 

1.3 57 2.5 454 4.5 1,730 10.0 6,880 

1.5 94 3.0 742 5.0 2,080 

1.7 142 3.5 1,060 6.0 2,850

Discharge, in second-feet, water year October 1940 to September

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

32 

34 

32 

34 

36

31

30 

29 

240 

508

272 

159 

145 

129 

99

84 

82 

110 

126 

666

538 

334 

272 

694 

454

292 

235 

195 

208 

964 

1,060

Nov.

928 

772 

536 

402 

312

402 

991 

991 

803 

652

481 

378 

334 

292 

272

235 

218 

205 

186

195

235 

192 

189 

208 

225

254 

378 

876 

1,870 

991

Dec.

681 

564 

593 

536 

712

991 

772 

652 

536 

454

402 

355 

312 

292 

254

254 

235 

272 

431 

2,200

1,380 

1,180 

928 

928 

1,120

1,520 

1,380 

1,120 

865 

712 

622

Jan.

503 

454 

428 

378 

378

508 

622 

536 

481 

428

378 

355 

334 

334 

454

1,030 

4,680 

5,420 

2,460 

1,520

1,060 

803 

681 

652 

1.620

1,380 

1,060 

803 

652 

593 

772

Feb.

803 

865 

742 

622 

564

481 

428 

402 

378 

402

402 

378 

355 

334 

312

292 

272 

254 

254 

232

218 

205 

208 

235 

221

208 

292 

481

Month SecondMontn foot-days

Goto 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

Hay 

June 

July 

Augu 

Sept

ffa

mber ......................

lendar year 194C 

ary

....... 1

h .........................

1 .........................

st ........................

ember .....................

8,124 

15,003 

23,253

96,768

31,762 

10,840 

9,552 

6,217 

12,274 

3,796 

1,665 

1,411 

6,872

ter year 1940-41 .......... 130,769

Mar.

481

508 

454 

378 

334

312 

272 

254 

235 

225

211

198 

186 

176 

170

164 

164 

402 

712 

564

454 

428 

355 

312 

272

254 

235 

225 

214 

208 

195

Maximum

1,060 

1,870 

2,200

4,350

5,420 

865 

712 

402 

2,450 

179 

86 

137 

538

5,420

Apr.

189 

189 

189 

198 

312

402 

378 

355 

334 

292

272 

235 

218 

208 

218

221 

201 

186 

173 

162

153 

148 

142 

134 

127

124 

117 

114 

114 

112

May

108 

108 

142 

221 

428

402 

334 

272 

235 

208

189 

173 

159 

150 

148

530 

2,450 

1,250 

865 

622

508 

428 

355 

312 

272

254 

272 

254 

228 

205 

192

Minimum

29 

186 

235

22

334 

205 

164 

112 

108 

90 

38 

30 

96

29

June

179 

167 

156 

148 

142

150 

153 

137 

137 

127

117 

112 

108 

103 

99

99 

99 

122 

148 

170

142 

127 

132 

117 

112

114 

101 

94 

94 

90

Mean

262

500 

750

538

1,025 

387 

308 

207 

396 

127 

53.7 

45.5 

229

358

1941

July

Per 

square 

mile

2.32 

4.42 

6.64

4.76

9.07 

3.42 

2.73 

1.83 

3.50 

1.12 

.475 

.403 

2.03

3.17

86 

80 

78 

74 

71

71 

67 

64 

60 

57

57 

54 

54 

51

48

48 

45 

44 

43 

43

42 

42 

43 

42 

52

47 

43 

42 

40 

39 

38

Aug.

38 

38 

59 

54 

44

40 

38 

36 

36 

33

33 

36 

36 

33 

32

31 

31 

30 

30 

30

30 

31 

33 

36 

40

52 

74 

137 

80 

64 

96

Sept.

160 

434 

279 

428 

292

221 

170 

137 

142 

332

538 

334 

254 

254 

235

221 

235 

235 

292 

272

225 

192 

170 

148 

134

124 

114 

105 

99 

96

Runoff

Inches

2.67 

4.94 

7.65

64.75

10.45 

3.57 

3.14 

2.05 

4.04 

1.25 

.55 

.46 

2.26

43.03

Acre- feet

16,110 

29,760 

46,120

390,200

63,000 

21,500 

18,950 

12,330 

24,350 

7,530 

3,300 

2,800 

13,630

259,400
14 CHEHALIS RIVER BASIN

Chehalis River near Grand Mound, Wash.

Location.- Water-stage recorder, lat. 46°46'35n ' long. 123°02'05" (revised), in NEi 

sec. 22, T. 15 N., R. 3 W., at Meadow, li miles southwest of Grand Mound arid about 6 

miles downstream from Skookumchuck River. Datum of gage is 123.27 feet above mean sea 

level, datum of 1929.

Drainage area.- 897 square miles (revised). 

Records available.- October 1928 to Septemoer 1941. 

Average discharge.- 13 years, 2,607 second-feet.

Extremes.- Maximum discharge during year, 18,800 second-feet Jan. 19 (gage height, 12.69 

reet;; minimum, 152 second-feet Aug. 17, 20.

1928-41: Maximum discharge, 48,400 second-feet Dec. 29, 1937 (gage height, 18.39 

feet); minimum, 108 second-feet Sept. 24, 1938.

Remarks.- Records good. Cities of Centralia and Chehalis divert about 15 second-feet 

from Newaukum River, a tributary, for municipal supply. No noticeable regulation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

238

238

233

242

251

246

225

217

225

229

755

8S1

642

704

576

452

396

374

415

498

1,270

1,140

881

1,240

1,920

1,340

992

820

720

1,050

3,370

Nov.

3,230

3,020

2,420

1,860

1,500

1,270

1,380

2,810

3,160

2,680

2,160

1,860

1,560

1,380

1,230

1,110

1,030

1,000

926

881

1,120

1,220

1,060

1,070

1,400

1,500

1,560

2,480

8,150

8,150

-

Dec.

5,240

3,740

3,090

3,090

3,020

4,910

4,430

3,580

3,020

2,480

2,160

1,920

1,680

1,500

1,400

1,270

1,220

1,250

1,400

5,310

7,750

6,270

5,240

4,750

4,910

5,920

6,990

6,630

5,240

4,270

3,660

Jan.

3,090

2,680

2,360

2,820

2,160"

2,740

3,230

3,300

2,950

2,620

2,290

2,100

1,980

1,920

2,220

3,090

5,320

15,100

18,100

13,200

8,150

5,750

4,430

3,580

3,960

6,270

5,240

4,110

3,440

3,020

2,880

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

3,810

3,810

3,510

3,160

2,810

2,480

2,220

2,040

1,920

2,040

1,980

1,920

1,800

1,620

1,560

1,450

1,380

1,320

1,250

1,170

1,110

1,050

1,010

1,080

1,170

1,060

1,170

1,860

_

_

-

Secondfoot-days

22,780

64,177

117,340

972,404

143,440

52,760

45,332

32,937

44 973

19 199

9*277

6,572

23,583

582,370

Mar.

2,290

2,420

2,360

2,040

1,800

1,620

1,440

1,310

1,200

1,110

1,050

1,010

935

890

845

820

802

1,160

2,220

2,550

2,100

1,860

1,680

1,500

1,370

1,300

1,210

1,140

1,090

1,110

1,100

Maximum

3,370

8,150

7,750

19,100

18,100

3,810

2,550

1,860

6,270

1,070

513

452

1,250

18,100

Apr.

1,040

1,060

1,030

1,090

1,150

1,740

1,860

1,860

1,740

1,740

1,560

1,380

1,270

1,170

1,140

1,160

1,130

1,040

944

872

811

777

736

720

696

665

658

658

620

620

-

May

612

612

650

752

1,090

1,500

1,330

1,150

1,000

890

811

777

768

736

704

736

3,520

6,270

4,110

2,880

2,160

1,740

1,450

1,230

1,080

992

1,020

1,110

1,270

1,050

973

Minimum

217

881

1,220

124

1,920

1,010

802

620

612

446

196

152

480

152

June

1,070

964

881

811

744

736

811

760.

720

680

628

591

555

533

513

499

499

519

605

736

712

628

576

555

506

492

492

472

465

446

-

Mean

735

2,139

3,785

2,657

4,627

1,884

1,462

1,098

1,451

640

299

SIS

786

1,596

July

513

446

415

385

385

385

362

362

351

335

329

329

319

314

309

288

274

270

246

251

246

238

229

229

221

246

208

196

204

196

196

Per

square 

mile

0.819

2.38

4.22

2.96

5.16

2.10

1.63

1.22

1.62

.713

.333

.236

.876

1.78

Aug.

193

L96

221

279

279

217

196

LSI

L74

166

166

L63

L74

L77

166

159

L52

L56

166

159

159

L63

L74

L77

204

225

j

4

£

284

45

52

S56

293

Sept.

a500

al,000

a900

a980

1,250

1,040

777

612

519

513

836

a900

al.OOO

aSSO

a760

aSOO

836

881

899

a940

a970

a900

a 800

a730

a670

a610

a570

a530

a500

a480

-

Runoff

Inches

0.94

2.66

4.86

40.32

5.95

2.19

1.88

1.37

1.86

.80

.38

.27

.98

24.14

Acre feet

45,180

127,300

232,700

1,929,000

284,500

104,600

89,910

65,330

89,200

38,030

18,400

13,040

46,780

1,155,000

a Ho gage-height record; 

Note.- Shifting-control

discharge computed on basis of records for Satsop River near Satsop. 

nethod used Oct. 1-30, Feb. 14 to Sept. 30.
CHEHALIS RIVER BASIN 15

Skookumchuck River near Centraila, Wash.

Location.- Water-stage recorder, lat. 46°47'15", long. 122°42'45", in SWiNWi sec. 17, 

T. 15 N., R. IE., hair a mile upstream from Bloody Run Creek, 4J- miles upstream from 

Thompson Creek, and 12 miles northeast of Centralia. Datum of gage is 300.0 feet 

above mean sea level (river-profile survey).

Drainage area.- 60 square miles.

Records available.- April 1929 to September 1931, October 1939 to September 1941.

Extremes.- Maximum discharge during year, 1,880 second-feet Jan. 18 (gage height, 43.63 

feet); minimum, 22 second-feet Oct. 7-9 (gage height, 39.40 feet).

1929-31, 1939-41: Maximum discharge, 3,240 second-feet Mar. 31, 1931 (gage height, 

7.50 feet, site and datum then in use); minimum, 21 second-feet Sept. 23, 24, 1930, 

Sept. 8, 9, 23, 24, 25, '26, 1940.

Remarks.- Records ^excellent. No diversion or regulation.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

39.6 

39. S 

40.0 

40.2

37

73

101

40.4

40.6

40.8

41.0

141 

190 

248 

31S

41.3

41.6

42.0

43.0

444

588

S17

1,470

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

25

25

25

27

25

23

22

22

23

50

100

52

90

66

51

44

40

38

38

42

67

56

60

241

174

111

86

72

71

244

314

Nov.

274

238

182

141

119

102

202

311

264

206

180

148

130

117

104

98

96

8S

83

91

117

98

88

111

128

121

132

315

734

404

Dec.

2S8

235

244

226

324

370

292

248

203

174

155

138

125

117

110

102

101

110

135

577

417

322

281

307

338

396

431

383

318

274

232

Jan.

203

180

167

164

169

214

212

190

180

167

157

145

145

160

195

229

564

1,440

709

467

366

292

254

232

342

374

307

260

229

214

248

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

330

314

27S

244

214

192

169

157

155

162

145

138

128

121

115

110

104

101

96

93

S8

86

87

94

87

85

117

152

.

-

-

Secondfoot-days

2,324

5,422

7,973

71,757

9,175

4,162

3,985

3,293

4,796

2 540

1 275 *995

2,380

48,320

Mar.

177

229

195

162

143

12S

117

106

99

96

91

87

84

80

77

76

74

191

235

201

164

164

138

128

117

108

102

98

96

123

99

Maximum

314

734 57r

1.71C

1.44C

33C

23!

232

64 E

12E5 r

52

181

1.44C

Apr.

108

106

106

102

145

232

201

172

169

162

143

132

119

134

113

104

98

90

86

81

77

74

72

71

68

65

71

65

64

63

-

May

62

62

88

87

155

148

125

115

101

90

85

87

81

79

76

140

645

485

322

244

201

167

141

125

115

111

110

162

134

117

136

Minimum

22

83

101

21

145

85

74

63

62

61

32

25

39

22

June

125

113

106

98

93

104

108

94

SS

84

80

73

70

67

66

65

66

77

121

113

96

86

81

74

71

70

65

63

62

61

-

Mean

75.0

181

257

196

296

149

129

110

155

84.7

41.1

32.1

79.3

132

July

57

55

55

52

52

49

48

47

46

45

44

44

42

41

40

38

38

38

38

37

34

34

35

34

34

32

34

34

33

33

32

Per 

square 

mile

1.25

3.02

4.28

3.27

4.93

2.48

2.15

1.83

2.58

1.41

.685

.535

1.32

2.20

Aug.

31

31

42

42

34

33

30

30

30

30

30

34

31

29

27

27

27

26

25

25

25

25

34

33

30

42

39

52

38

32

31

Sept.

39

52

54

104

108

84

65

53

48

61

57

51

50

67

110

98

108

94

135

187

130

104

87

76

69

63

59

56

55

56

-

Runoff

Inches

1.44

3.36

4.94

44.47

5.69

2.58

2.47

2.04

2.97

1.57

.79

.62

1.48

29.95

Acre-feet

4,610

10,750

15,810

142,300

18,200

8,260

7,900

6,530

9,510

5,040

2,530

1,970

4,720

95,830
16 CHEHALIS RIVER BASIN

Satsop River near Satsop, Wash.

Location.- Water-stage recorder, lat. 47°00'05'1 , long. 123°29'40" (revised), In sec. 36,

 T. 18 N., R. 7 W., 1 mile west of Satsop and 14 miles upstream from mouth. Datum of 

gage Is at mean sea level, datum of 1929.

Drainage area.- 315 square miles.

Records available.- March 1929 to September 1941.

Average discharge.- 12 years, 1,933 second-feet.

Extremes.- Maximum discharge during year, 25,200 second-feet Jan. 18 (elevation, 33.81

 feet), from rating curve extended above 10,000 second-feet; minimum, 226 second-feet 

Oct. 3, 9 (elevation, 22.49 feet).

1929-41: Maximum discharge observed, 52,500 second-feet Jan. 22, 1935 (elevation, 

38.9 feet, from floodmarks), from rating curve extended above 17,000 second-feet; 

minimum discharge, 166" second-feet Sept. 21, 1938.

Remarks.- Records excellent except those above 12,000 second-feet, which are fair. No 

diversions or regulation.

22.5 229

22.7 285

22.9 352

23,2 477

Rating tables, water year 1940-41 (gage height, In feet, and discharge. 

In second-feet)

Oct. 1 to Jan. 17 Jan. 18 to Sept. 30

23.5 630

24.0 1,000

24:5 1,490

25.0 2,080

25.5 2,810

26.0 3,600

27.0 5, 430

28.0 7,550

23.2

23.5

24.0

24.5

25.0

225

367

730

1,290

1,950

25.5

26.0

27.0

28.0

29.0

2,720

3,570

5,490

7,670

10,000

30.0

31.0

32.0

12,600

15,500

13,600

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

229

229

232

256

270

251

237

229

257

2,630

2,400

1,210

910

725

619

545

535

3,400

3,860

5,880

5,080

3,040

2,510

3,600

2,660

2,020

1,660

1,490

1,540

2,440

2,960

Nov.

3,520

3,350

2,530

2,080

1,830

2,220

3,040

3,520

3,040

2,440

2,080

1,330

1,600

1,440

1,330

1,230

1,180

1,090

1,010

1,030

1,070

955

910

1,240

1,540

1,490

1,710

2,720

5,280

3,600

Dec.

2,810

2,360

2,440

2,360

2,580

2,830

3,110

4,580

3,770

2,810

2,360

2,020

1,770

1,600

1,490

1,330

1,330

1,380

1,670

5,280

3,770

3,110

2,880

3,350

4,300

5,480

4,490

4,780

5,280

a4,600

a4,000

Jan.

a3,300

a2,700

a2,350

2,020

1,830

1,830

2,020

1,950

1,830

1,710

1,600

1,490

1,490

1,440

1,440

2,620

10,400

16,800

7,440

4,890

3,840

3,140

2,720

2,560

4,480

4,690

3,570

2,960

2,560

2,400

2,900

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

Bay ...........................

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

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

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

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

Water year 1940-41 ..........

Feb.

4,600

3,750

3,220

2,880

2,560

2,250

2,020

1,880

1,880

1,950

2,250

2,100

1,880

1,750

1,640

1,550

1,450

1,360

1,290

1,220

1,160

1,110

1,070

1,130

1,100

1,370

2,080

3,220

_

-

Secondfoot-days

53,904

61,955

96,020

673,800

106,970

55,720

45,818

27,315

41,221

16,879

10, 235

8,625

26,752

551,414

Mar.

2,300

2,830

2,480

2,180

1,380

1,740

1,670

1,550

1,310

1,350

1,270

1,180

1,120

1,050

1,020

973

951

1,170

1,730

1,710

,500

,640

,510

,370

,290

1,210

1,130

1,060

1,040

1,070

984

Maximum

5,880

5,280

5,480

11,800

16,800

4,600

2,880

1,680

6,990

790

414

507

2,020

16,800

Apr.

940

907

951

1,020

1,070

1,480

1,630

1,510

1,390

1,250

1,150

1,050

995

951

907

835

852

800

760

721

703

557

640

624

608

534

568

553

553

546

-

May

539

539

534

539

929

1,120

1,030

885

770

703

649

667

616

576

563

1,570

6,990

4,220

2,640

2,250

1,880

1,600

1,410

1,240

1,130

1,050

995

973

907

852

800

Minimum

229

910

1,330

224

1,440

1,070

951

546

539

420

275

237

477

229

June

780

790

712

676

649

685

649

608

608

576

553

525

513

490

490

477

490

553

546

592

592

553

532

490

484

532

445

432

432

420

-

Mean

1,739

2,065

3,097

1,841

3,451

1,990

1,478

910

1,330

563

330

278

892

1,511

July

414

402

391

385

373

367

362

356

352

345

340

335

335

329

318

313

318

313

313

313

313

308

304

304

304

304

294

290

285

280

275

Per

square 

mile

5.52

6.56

9.83

5.84

11.0

6.32

4.69

2.89

4.22

1.79

1.05

.383

2.83

4.80

Aug.

275

£

2

;

85

35

29

294

280

J

J

J

71

66

62

262

262

:

t;

J62

J62

J5S

254

254

;350

Ml

246

237

241

341

371

371

266

285

399

508

285

366

507

Sept.

1,410

1,660

1,200

2,020

1U90

863

635

584

539

949

1,280

1,170

984

929

841

863

940

830

929

940

830

730

667

608

576

546

504

490

477

513

~

Runoff

Inches

6.36

7.31

11.34

79.54

12.63

6.58

5.41

3.22

4.87

1.99

1.21

1.02

3.16

65.10

Ac re- feet

106,900

122,900

190,500

1,336,000

212,200

110,500

90,880

54, 180

31,760

33,480

20,300

17,110

53,060

1,094,000

Ho gage-height record; discharge computed on basis of records for Ohehalia River near Grand
CHEHALIS RIVER BASIN 17

Wynoochee River at Oxbow, near Aberdeen, Wash.

Location.- Water-stage recorder, lat. 47°19'30", long. 123°38'20", In sec. 12, T. 21 N., 

K. 8 W., 1 mile downstream from Oxbow and 24 miles northeast of Aberdeen. Discharge 

measurement made at site li miles upstream.

Drainage area.- About 65 square miles, above discharge measuring section (uncertain because 01 inadequate maps).

Records available.- May 1925 to September 1941. 

Average discharge.- 16 years, 766 second-feet.

Extremes.- Maximum discharge during year, 10,600 second-feet Jan. 17 (gage height, 23.47 

feet), from rating curve extended above 7,500 second-feet); minimum, 96 second-feet 

Oct. 9 (gage height, 2.05 feet).

1925-41: Maximum discharge, 18,000 second-feet Jan. 22, 1935 (gage height, 30.3 

feet, from floodmarks), from rating curve extended above 5,300 second-feet; minimum, 

76 second-feet Sept. 23, 1930.

Remarks.- Records excellent. No diversion or regulation.

2.1 

2.4 

2.8 

3.2 

3.7

100

125

161

200

259

Rating table

Oct. 1 to Jan

water year 1940-41 (gage height, in feet, and discharge, 

in second-feet)

4.3 

5.0 

6.0 

8.0 

10.0

358

505

750

1,320

1,970

12.0 2,810

14.0 3,930

16.0 5,130

18.0 6,400

Jan. IS to Sept. 30

2.1 105 3.7 268 8.0 1,380

2.4 131 4.3 373 10.0 2,000

2.5 167 5.0 539 12.0 2,810 

3.2 207 6.0 806

Note.- Same as preceding table above 

12.0 feet.

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

99

98

100

120

112

104

100

98

158

2,590

1,020

540

419

330

288

252

658

5,780

4,230

3,990

2,690

1,500

1,800

2,060

1,260

941

776

725

969

1,440

1,500

Nov.

1,560

1,260

969

808

776

1,140

2,410

1,780

1,290

1,020

829

725

650

588

528

494

472

440

408

408

378

358

348

483

540

461

638

1,300

1,670

1,050

-

Dec.

S29

725

1,110

857

1,360

1,260

2,060

2,850

1,560

1,140

913

776

700

625

564

516

505

776

1,840

2,900

1.S30

1,320

1,260

2,090

2,660

2,370

1,680

1,930

1,820

1,410

1,140

Jan.

941

829

750

700

625

612

675

650

612

588

564

552

750

625

810

1,410

5,690

4,550

2,100

1,520

1,230

1,030

890

946

2,070

1,500

1,120

946

834

946

2,440

Feb.

2,420

2,000

1,520

1,500

1,200

1,030

1,200

806

1,090

1,200

1,030

890

779

698

644

591

542

513

488

451

428

405

416

416

451

630

1,600

1,940

_

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

1,520

1,700

1,290

1,000

862

890

806

725

644

591

542

500

475

439

416

394

405

617

1,030

806

698

946

725

617

565

539

513

475

463

500

439

Apr.

405

405

463

48S

752

1,140

1,060

834

726

644

565

500

463

439

428

405

384

353

344

325

316

308

308

291

2S3

283

276

268

261

254

-

Secondfoot-days

36,747

25,775

43,076

284,508

39,485

26,878

22, 132

13,970

21,125

8,370

4,999

4,535

16,001

263,093

May

254

261

291

340

617

806

57S

475

405

363

363

373

344

316

308

1,720

3,770

1,630

1,120

1,000

834

726

644

578

526

475

451

428

394

373

363

Maximum

5,780

2,410

2,900

5,780

5,690

2,420

1,700

1,140

3,770

384

212

1,010

1,400

5,780

June

353

344

316

308

299

308

291

2S3

268

E61

254

248

241

235

241

224

262

325

299

384

344

308

291

268

261

248

235

229

224

218

-

Minimum

98

348

505

94

552

405

394

254

264

218

126

104

248

98

July

212

207

202

197

192

187

182

182

177

172

172

167

162

162

158

158

154

154

149

149

144

144

140

140

140

136

136

136

131

131

126

Aug.

126

131

144

140

131

126

122

122

118

118

118

113

113

113

109

109

109

109

105

105

104

104

113

113

113

118

122

118

113

126

1,010

Mean

1,185

859

1,390

777

1,274

960

714

466

681

279

161

146

533

721

Sept.

1,400

909

1,100

1,080

617

451

363

308

310

890

779

578

500

488

428

542

488

46S

684

542

439

364

344

316

291

276

261

254

248

268

"

Runoff in 

acre-feet

72,890

51,120

85,440

564,300

78, 320

53,310

43,900

27, 710

41,900

16,600

9,920

9,000

31,740

521,800

Peak discharge.- Oct. 18 (10:30 a.m.) 7,590 sec.-ft.; Jan. 17 (8 p.m.) 10,600 sec.-ft.
18 QUINA.ULT RIVER BASIN

Quinault River at Quinault Lake, Wash.

Location.- Water-stage recorder, lat. 47°27'30", long. 123°53'30", In sec. 25, T. 23 N.,

 R. 10 W., at outlet of Quinault Lake, 4 miles southwest of Quinault.

Drainage area.- 264 square miles.

Records available.- October 1911 to September 1941.

Average discharge.- 30 years, 2,704 second-feet.

Extremes.- Maximum discharge during year, 16,000 second-feet Oct. 19 (gage height, 11.12

 feet); minimum, 374 second-feet Aug. 22 (gage height, 2.14 feet).

1911-22, 1924-32, 1933-41: Maximum discharge, 37,000 second-feet Dec. 12, 1921 

(gage height, 16.3 feet, datum then in use), from rating curve extended above 25,000 

second-feet: minimum, 285 second-feet Sept. 20, 1924 (gage height, 0.74 foot, datum 

then in use).

Remarks.- Records excellent except those for periods of no gage-height record, which are

 fair. No diversion. Slight regulation caused by natural storage in lake.

Rating table

2.3 

2.5 

2.7 

3.0

water year 194O-41 (gage height, In feet, and discharge 

In second-feet)

454

565

697

945

3.5 1,400

4.0 

4.5 

5.0 

6.0

1,910

2,500

3,210

4,300

7.0 6,700

9.0

10.0

11.0

8,700

10,800

13,100

15,700

Discharge, In second-feet, water year October 1940 to September 1941 [ i r i r

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

459

444

434

439

434

423

413

403

434

2,400

3,620

2,910

2,250

1,860

1,550

1,350

1,360

9,310

14,600

13,100

12,200

8,500

6,500

7,500

6,100

4,630

3,740

3,140

2,980

3,510

3,900

Nov.

4,460

4,460

3,900

3,280

2,910

2,910

4,370

5,720

4,980

3,980

3,360

2.S40

2,440

2,250

2,080

1,910

1,800

1,700

1,650

1,700

1,600

1,450

1,400

1,400

1,600

1,550

1,700

2,340

4,630

4,460

-

Dec.

3,820

3,360

3,510

3,440

3,740

4,460

5,530

8,500

7,500

5,600

4,500

3,700

3,000

2,500

2,200

2,000

1,900

2,000

3,000

6,600

5,200

4,500

4,100

5,000

6,000

5,400

4,500

5,800

4,800

4,100

3.600

Jan.

3,250

2,850

2,600

2,350

2,130

2,080

2,020

1,960

1,960

2,020

2,020

2,020

2,250

2,370

2,370

2,910

6,360

14, 100

9,960

6,900

4,980

3,900

3,280

2,910

3,820

4,300

3,740

3,210

2,840

2,700

3,960

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

7,500

7,900

6,300

5,530

5,160

4,300

3,660

3,210

3,230

3,530

3,510

3,210

2,840

2,560

2,310

2,130

1,960

1,860

1,750

1,700

1,600

1,550

1,500

1,450

1,450

1,650

2,270

4,140

_

_

-

Secondfoot-days

121,093

84,830

133,860

993, 661

114.120

89,860

74,950

57,750

89,770

46, 140

24,129

13,878

51.852

902,232

Mar. i Apr.

4,630 2.020

4,980 2,020

4,460 2,020

3,660 2,020

3,140 2,190

2,340 2,770

2,560 3,140

2,370 3,060

2,190 2,840

2,080 2,630

1,910 2,370

1,800, 2,130

1.750: 2,020

1,650 1,910

1,600! 1,860

1,550. 1,800

1,500' 1,700

1,6501 1,600

2,250

2,500

2,370

2,500

2,440

2,250

2,080

2,020

2,020

2,020

2,020

2,080

2,080

Maximum

14,600

5,720

8,500

14,600

14,100

7,900

4,980

3,140

8,790

1,910

1,120

828

3,210

14,600

1,550

1,500

1,450

1,450

1,450

1,450

1,450

1,450

1,500

1,500

1,450

1,450

-

May

,450

,450

,450

,450

,700

2,130

2,250

2,080

1,910

1,750

1,800

2,080

2,130

2,020

1,910

2,920

8,790

8,300

6,100

4,980

4,140

3,660

3,360

3,210

3,060

2,770

2,500

2,310

2,130

2,020

1,960

Minimum

403

1,400

1,900

374

1,960

1,450

1,500

1,450

1,450

1,120

503

374

981

374

June

1,910

1,910

1,300

,700

,650

,650

,700

,650

,600

,600

,600

,650

,700

,600

,500

,400

,400

,500

,550

,600

,600

,550

,500

,400

,350

1,300

1,260

1,220

1,170

1,120

-

Mean

3,906

2,828

4,318

2,715

3,681

3,209

8,418

1,925

2,896

1,538

778

448

1,728

8,472

July

1,120

1,110

1,090

1,050

1,010

981

954

936

892

S56

S39

814

790

781

765

758

750

758

758

720

697

669

635

609

584

565

554

542

525

514

503

Per

square 

mile

14.8

10.7

16.4

10.3

13.9

12.2

9.16

7.29

11.0

5.83

2.95

1.70

6.55

9.36

Aug.

492

486

503

519

508

497

481

470

454

449

444

439

428

418

413

403

398

393

389

384

379

374

398

408

413

418

423

423

413

428

828

Sept.

1,750

2,130

2,310

3,210

2,700

2,130

1,750

1,500

1,300

11,700

2,080

2,020

1,860

1,800

1,750

1,600

1,910

1,800

1,860

1,860

1,700

1,600

1,450

1,350

1,260

1,170

1,100

1,040

981

981

~

Runoff

Inches

17.06

11.95

18.86

139.97

16.08

12.66

10.56

8.14

12.65

6.50

3.40

1.96

7.30

127.12

Acre feet

240,200

16B, 300

265, 500

1,971,000

226,400

178,200

148,700

114,500

178,100

91,520

47,860

27,530

102,800

1,790,000

Note.- No gage-height record Nov. 17-25, Dec. 10 to Jan. 4; discharge computed on basis of one 

discharge measurement, recorded range of stage, and records for Queets River near Clearwater.
QUEETS RIVER BASIN 

ijueets River near Clear-water, Wash.

19

Location.- Water-stage recorder, lat. 47°32', long. 124°19', In SWt sec. 36, T. 24 N.,

 R. 13 W., on Qulnault Indian Reservation, 2 miles downstream from Clearwater River 

and 4 miles southwest of Clearwater. Datum of gage is 14.5 feet above mean sea level 

(river-profile survey).

Drainage area.- 454 square miles.

Records available.- September 1930 to September 1941.

Average discharge.- 11 years, 4,295 second-feet.

Extremes.- Maximum discharge during year, 53,200 second-feet Jan. 17 (gage height, 19.56

 feet), from rating curve extended above 30,000 second-feet; minimum, 457 second-feet 

Aug. 18, 20.

1930-41: Maximum discharge, 100,000 second-feet Jan. 22, 1935 (gage height, 27.0 

feet, present datum, from floodmarks), from rating curve extended above 31,000 secondfeet; minimum, 384 second-feet Aug. 31, 1938; minimum gage height, 3.58 feet, present 

datum, Oct. 11, 1932.

Remarks.- Records excellent except those above 30,000 second-feet, which are fair. No 

diversion or regulation.

5.0 

5.3 

5.6 

6.0 

6.5

Rating table, water year 1940-41 (gage height, in feet, and discharge, 

in second-feet)

Oct. 1 to Jan. 17

470

710

1,010

1,460

2,030

7.0 

7.5 

8.0 

9.0 

10.0

2,750

3,500

4,410

6,700

9,310

11.0

12.0

13.0

15.0

12,200

15,600

19,300

27,900

Jan. IS to Sept. 30

5.3 600 7.0 2,750 

5.6 900 S.O 4,500 

6.0 1,360 9.0 6,700 

6.5 2,010

Mote.- Same as preceding 

table above 9 feet.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

548 

526 

491 

612 

638

540 

505 

477 

l.OSO 

14,500

5,410 

2,890 

2,340 

1,830 

1,640

1,420 

3,710 

34,600 

24,800 

12,900

12,200 

7,200 

7,720 

9,350 

5,970

4,510 

3,670 

3,340 

4,030 

4,610 

6,210

Nov.

7,720 

5,970 

4,510 

3,760 

4,040

6,210 

11,000 

9,310 

6,090 

4,610

3,940 

3,340 

2,960 

2,750 

2,540

2,400 

2,340 

2,140 

1,950 

2,140

2,030 

1,320 

1,760 

2,280 

2,890

2,280 

3,190 

6,440 

10,200 

6,090

Dec.

4,610 

4,220 

5,920 

4,510 

7,820

6,700 

17,700 

18,800 

9,040 

6.090

4,720 

3,850 

3,340 

2,960 

2,630

2,470 

2,400 

3,670 

6,960 

11,900

6,450 

6,090 

5,620 

3,770 

11,000

9,850 

6,950 

10,700 

9,310 

6,700 

5,270

Jan.

4,320 

3,670 

3,260 

3,190 

2,890

2,390 

3,120 

2,820 

2,320 

2,750

2,470 

2,340 

3,500 

2,820 

3,240

5,730 

26,800 

19.800 

9,580 

6,460

5,110 

4,310 

3,760 

3,670 

10,400

7,460 

5,220 

4,400 

3,760 

4,510 

11,000

Month

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

ffa

mber ......................

lendar year 1940 ..... ...

ary

ember . . ................

ter year 1940-41 ..........

Feb.

17,400 

15,700 

8,770 

7,720 

5,770

4,700 

4,310 

3,670 

6.380 

6,230

5,550 

4,500 

3,850 

3,410 

3,070

2,750 

2,520 

2.360 

2,220 

2,030

1,940 

1,300 

1,300 

2,080 

2,980

5,330 

7,900 

9.040

Secondfoot-days

130,817 

123,750 

217,070

1,429,639

173, 070 

145,880 

105,230 

70,300 

116,700 

43,110 

27,083 

20,953 

84,320

1,323,283

Mar.

6,230 

7,460 

5,770 

4,500 

3,760

4,500 

3,850 

3,410 

2,990 

2,750

2,520 

2,360 

2,150 

2,010 

1,870

1,800 

1,800 

3,070 

5,550 

4,400

3,670 

5,110 

3,670 

3,070 

2,750

2,670 

2,590 

2,360 

2,220 

2,290 

2,080

Maximum

34,600 

11,000 

13,800

34,600

26,800 

17,400 

7,460 

5,550 

19, 400 

2,010 

1,200 

4,480 

7,090

34,600

Apr.

2,080 

2,010 

2,440 

2,590 

4,160

5,550 

4,SOO 

3,940 

3,580 

3,070

2,670 

2,360 

2,220 

2,150 

2,440

2,220 

1,940 

1,800 

1,740 

1,680

1,610 

1,610 

1,610 

1,520 

1,470

1,470 

1,460 

1,410 

1,360 

1,340

May

1,400 

1,410 

1,740 

1,610 

3,060

4,380 

3,070 

2,440 

2,150 

1,940

2,010 

2,440 

2,030 

1,300 

1,740

10, 300 

19,400 

9,040 

6,230 

5,770

4,700 

3,940 

3,670 

3,410 

2,990

2,590 

2,360 

2,360 

2,220 

2,010 

1,940

Minimum

477 

1,760 

2,400

470

2,340 

1,300 

1,800 

1,340 

1,400 

1,200 

576 

4S5 

1,250

477

June

2,010 

1,940 

1,300 

1,680 

1,600

1,870 

2,010 

1,680 

1,610 

1,560

1,680 

1,740 

1,570 

1,400 

1,300

1,250 

1,350 

2,010 

1,740 

1,870

1,940 

1,740 

1.5SO 

1,440 

1,400

1,370 

1,320 

1,250 

1,200 

1,200

Mean

5,833 

4,292 

7,002

3,906

5,744 

5,210 

3,395 

2,343 

3,765 

1,604 

874 

676 

2,311

3,625

July

1,200 

1,190 

1,130 

1,090 

1,030

1,040 

1,060 

1,030 

977 

922

911 

900 

900 

922 

988

955 

955 

966 

911 

845

780 

730 

681 

654 

627

636 

645 

627 

618 

592 

576

Per 

square 

mile

12.8 

9.45 

15.4

8.60

12.7 

11.5 

7.43 

5.16 

S.29 

3.53 

1.93 

1.49 

6.19

7.93

Aug.

544 

528 

627 

6S1 

584

536 

536 

544 

552 

544

552 

513 

492 

435 

4S5

492 

492 

485 

492 

492

492 

499 

654 

627 

513

592 

663 

592 

520 

665 

4,480

Sept.

4,500 

2,880 

7,090 

6,640 

3,320

2,360 

1,940 

1,630 

1,600 

4,470

4,310 

2,990 

2,750 

3,160 

2,670

3,530 

3,320 

2,910 

3,160 

2,670

2,220 

2,010 

1,800 

1,630 

1,530

1,510 

1,370 

1,290 

1,250 

1,610

Runoff

Inches

14. SI 

10.55 

17.78

117.12

14.59 

11.95 

8.62 

5.76 

9.56 

3.94 

2.22 

1.72 

6.91

103.41

Acre feet

353,600 

255,400 

430,600

2,836,000

353,200 

239,300 

203,700 

139,400 

231,500 

95,420 

53,730 

41,560 

167,200

2,625,000

Peak discharge.- Oct. IS (12 m.) 44,900 sec.-ft.; Jan. 17 (6:45 p.m.) 53,200 sec.-ft
20 QUEETS RIVER BASIN 

Clearwater River near Clearwater, Wash.

Location.- Water-stage recorder, lat. 47°35', long. 124°18', in lot 4, sec. 18, T. 24 N.,

 R. 12 W., li miles north of Clearwater and 3 miles upstream from mouth.

Records available.- July 1937 to September 1941. October 1931 to September 1932, at site 

a quarter or a mile upstream.

Extremes.- Maximum discharge during year, 25,600 second-feet Jan. 17 (gage height, 14.51

 feet), from rating curve extended above 6,000 second-feet by velocity-area method; 

minimum, 96 second-feet Aug. 20, 21.

1931-32. 1937-41: Maximum discharge, 29,200 second-feet Oct. 28, 1937 (gage height, 

14.90 feet), from rating curve extended above 6,000 second-feet by velocity-area 

method; minimum, 60 second-feet Sept. 15, 16, 17, 18, 1938.

Discharge known to have been greater Jan. 21 or 22, 1935 (stage and discharge not 

determined).

Remarks.- Records excellent except those for periods of shifting-control, which are good,

 those for period of no gage-height record or above 8,000 second-feet, which are poor. 

No diversion or regulation.

Rating table, water year 1940-41 (gage height, in feet, and discharge,

in second-feet) 

(Shifting-control method used Oct. 1 to Nov. 20, Dec. 21 to Jan. 16, Sept. 4-29)

5.8 122

6.0 212

6.2 332

6.4 492

6.7 785

7.0 1,110

7.5 1,750

8.0 2,520

9.0 4,250

10.0 6,650

11.0 9,650

12.0 13,300

Discharge, 'in second- feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

142

142

134

182

177

150

138

130

613

4,370

1,560

911

722

557

466

400

1,630

13,100

7,120

3,410

3,240

2,120

2,050

2,280

1,540

1,200

974

922

1,180

1,400

1,900

Nov.

2,200

1,820

1,390

1,160

1,350

2,120

3,330

2,340

1,930

1,440

1,210

934

358

754

661

594

585

511

475

576

529

458

441

754

869

642

961

2,120

3,000

2,050

-

Dec.

1,540

1,320

2,100

1,620

2,730

2,360

7,270

7,130

3,240

2,120

1,590

1,230

1,060

911

796

722

680

922

1,680

3,060

1,300

1,760

1,750

2,520

3,160

3,000

2,280

3,630

3,160

2,360

1,760

Jan.

1,390

1,160

1,020

953

816

316

932

316

743

652

585

557

774

642

901

1,730

11,700

6,580

3,160

2,200

1,630

1,330

1,110

1,110

3,760

2,760

1,870

1,460

1,200

1,500

3,500

Feb.

6,250

6,160

3,160

2,280

1,700

1,330

1,270

1,050

2,030

1,930

1,870

1,460

1,240

1,050

900

796

722

652

594

548

501

466

466

535

1,160

2,030

3,310

3,030

_

_

-

Month

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

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

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

Calendar year 1940 ........

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

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

yarch. . ...................... . . ...

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

Vtstv May ..... ...... .............. ............

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

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

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

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

Water year 1940-41 ......... ............

Mar.

2,200

2,440

1,980

1,550

1,280

1,570

1,260

1,110

922

316

722

652

585

529

484

450

441

970

1,630

1,320

1,190

1,670

1,200

974

827

732

661

585

529

520

458

Apr.

450

432

658

712

1,300

1,590

1,390

1,130

1,090

330

743

642

566

548

670

566

492

441

400

377

354

332

319

306

293

230

267

256

250

245

-

Secondfoot-days

54,865

38,662

71,461

427,111

59,407

48,740

32,307

17,979

31,772

8 r 8S9

4,674

5,080

25,440

399,276

May

256

267

424

400

395

1,700

953

754

614

520

453

475

400

362

414

3,940

7,000

3,500

1,500

1,300

1,000

740

680

620

470

410

370

370

350

330

300

Maximum

13,100

3,330

7,270

13, 100

11,700

6,250

2,440

1,590

7,000

492

212

1,450

2,620

13,100

June

320

300

230

270

260

290

320

270

260

250

270

274

256

245

240

234

299

424

354

432

492

384

347

306

280

274

256

245

234

223

-

Minimum

130

441

630

99

557

466

441

245

256

223

112

97

312

97

July

212

207

202

192

187

132

177

172

162

153

153

153

150

150

146

146

146

146

133

134

134

130

126

126

122

122

122

120

120

117

112

Aug.

110

112

134

172

130

117

112

110

107

104

104

102

102

100

100

97

97

97

97

97

97

100

187

146

120

146

177

138

122

196

1,450

Mean

1,770

1,239

2,305

1,167

1,916

1,741

1,042

599

1,025

296

151

164

843

1,094

Sept.

1,340

312

2,620

2,160

1,140

806

604

501

513

1,310

1,330

932

922

964

327

1,030

964

838

327

712

594

520

475

432

400

377

340

326

312

407

~

Runoff in 

acre-feet

108,800

76, 680

141,700

847, 100

117,800

96,670

64,030

35,660

63,020

17,630

9,270

10,030

50,460

791,300

Peak discharge.- Oct. 18 (7:15 a.m.) 20,700 sec.-ft.; Jan. 17 (5:30 p.m.) 25,600 sec.-ft.

Hote.- No gage-height record May 17 to June 11; discharge computed on basis of one discharge

urement and records for Queets River near Clearwater.
HOH RIVER BASIN 21

Hoh River near Spruce, Wash.

Location.- Water-stage recorder, lat. 47°48'20", long. 124°06'20" (revised), In sec. 34, 

T. 27 N., R. 11 W., 2i miles downstream from Spruce and 5 miles downstream from South 

Fork.

Drainage area.- 193 square miles.

Records available.- August 1926 to September 1941.

Average discharge.- 15 years, 1,961 second-feet.

Extremes.- Maximum discharge during year, 16,000 second-feet Jan. 17 (gage height, 13.24 

reet), from rating curve extended above 8,000 second-feet on basis of velocity-area 

studies; minimum, 468 second-feet Oct. 2 (gage height, 1.60 feet).

1926-41: Maximum discharge, 40,000 second-feet Nov. 5, 1934 (gage height, 21.2 

feet, from high-water mark in gage structure), from rating curve extended above 8,000 

second-feet on basis of velocity-area studies (gage observer noted water higher on 

this day than at any other time during his 43 years of residence on the stream); 

minimum, 247 second-feet Nov. 14, 15, 1929; minimum gage height, 0.71 foot Nov. 10, 

1936.

Remarks.- Records excellent except those for period of faulty recorder operation, which 

are good> and those above 10,000 second-feet, which are fair. No diversion or 

artificial regulation. Large diurnal fluctuation during summer months caused by 

melting of glaciers at source.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

1.7 498

2.0 600

2.5 810

3.0 1,060

3.5 

4.0 

5.0 

6.0

1,360

1,690

2,470

3,470

7.0

8.0

10.0

12.0

4,780

6,300

9,700

13,500

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

11

16

21

23

25

26 

27 

28

Oct.

600

498

498

530

530

564

564

530

843

6,420

2,240

1,390

1,120

932

834

6,780

5,720

4,430

3,720

1,840 

1,560 

1,490

1,760

1,840

Nov.

2,060

1,690

1,490

1,330

1,420

1,760

4,220

2,740

2,060

1,690

1,460

1,270

1,150

1,060

1,010

958

932

858

810

787

720

678 

678

1,060

1,120

882 

1,300 

2,860

3,470

2,300

-

Dec.

2,220

2,060

2,970

2,140

4,480

2,840

6,590

6,460

3,470

2,650

2,220

1,910

1,690

1,520

1,390

1,270

1,300

2,140

3,800

5,830

3,360

3,470 

2,840

3,590

3,960

3,710 

2,840 

2,840

3,040

2,470

2,140

Jan.

1,840

1,620

1,490

1,360

1,300

1,240

1,210

1,150

1,490

1,520

Feb.

7,450

5,680

3,710

4,640

3,250

2,560

2,300

1,990

2,560

2,560

1,330 2.220

1,300 i 1,990

1,870 1,760

1,460

1,490

2,140

8,230

7,740

4,220

3,040

2,470

2,140 

1,990

1,910

3,580

2,740 

2,220 

2,060

1,840

2,070

4,830

Unv

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

Water year 1940-41- .........

1,590

1,460

1,360

1,270

1,180

1,120

1,040

1,010

984 

958

984

1,090

1,270 

2,870 

3,630

-

-

-

Secondfoot-days

n * QQo

41, 583

646,941

Mar.

2,650

2,650

2,06O

1,730

1,520

1,490

1,390

1,300

1,180

1,120

1,060

1,010

984

932

907

882

882

1,180

1,56O

1,360

1,270

1,490 

1,240

1,120

1,090

1,150 

1,180 

1,150

1,150

1,240

1,120

12 900

3,380

12,900

Apr.

1,300

1,150

1,180

1,120

1,490

1,730

1,560

1,390

1,300

1,210

1,060

984

932

958

1,090

984

907

834

May

1,040

984

958

932

1,490

June

1,390

1,330

1,240

1,240

1,270

1,990 1.590

1,390

1,180

1,060

1,040

1,460

1,870

1,560

1,270

1,240

4,520

7,240

3.830

810 2.840

810

834

882 

907

882

858

932 

984 

958

932

958

2,740

2,470

2,300 

2,390

2,390

2,140

1,840 

1,620 

1,590

1,420

1,330

1,420

498

crjo

1 P7fl 4-j ft. 1 \J

r\*n

764

498

1,590

1,330

1,300

1,460

1,760

1,990

1,690

1,420

1,240

1,180

1,300

1,800

1,560

1,490

1,360

1,420 

1,300

1,210

1,180

1,180 

1,210 

1,150

1,240

1.386

1.772

July

1,300

1,330

1,270

1,180

1,240

1,360

1,360

1,270

1,150

1,090

1,120

1,150

1,240

1,490

1,690

1,840

1,990

1,910

1,760

1,420

1,360

1,150 

984

907

907

1,040 

1,060 

1,010

932

932

858

Per

mile

7 91

V.18

9.18

Aug.

764 '

f

'

20

58

fi4

742

810

f

1 f

1»C

82

10

fiO

1,040

1,010

f

E

£

58

58

R2

932

907

9

1 ,<" i,c

O7

10

4O

1,090

1,060

958 

1,220

£ M

787

810 

699 

658

(.

£

19

10

2,640

Sept.

2,140

1,446

3,380

2,600

1,520

1,180

984

907

958

2,790

1,760

1,240

1,390

1,660

1,390

1,920

1,560

1,240

1,210

1,120

958

907 

958

958

958

984 

787 

764

1,110

Runoff

Inches

1 rt Qe

J. 1 »WQ

8.01

124.65

Acre-feet

9O 89O Q~j' Q^-rt

J.O4,9UU

82.480

1.283.000

Peak discharge.- Oct. 18 (9 a.m.) 15,300 sec.-ft.; Oct. 19 (8 a.m.) 14,100 sec.-ft.; Jan.17 (5p,m.) 

16.OOO sec.-ftT; Feb. 1 (8:30 p.m.) 8,470 sec.-ft.

Hote.- Recorder not operating properly Oct. 22 to Jan. 7; discharge computed on basis of corrected 

gage-height record.
22 QUILLAYOTE RIVER BASIN 

Soleduck River near Falrholm, Wash.

Location.- Water-stage recorder, lat. 48°02'30n , long. 123 057'30 n , In lot 4, sec. 35, T. 

 30 N., R. 10 W., 300 feet downstream from South Fork, 2.5 miles southwest of Falrholm, 

and 17 miles west of Beaver.

Drainage area.- 79 square miles.

Records available.- October 1917 to September 1921, October 1933 to September 1941.

Average discharge.- 12 years, 628 second-feet.

Extremes.- Maximum discharge during year, 9,550 second-feet Jan. 17 (gage height, 8.97 

reetj, from rating curve extended above 3,000 second-feet; minimum, 56 second-feet 

Oct. 9.

1917-21, 1933-41: Maximum discharge, 24,300 second-feet Dec. 21, 1933 (gage height, 

14.9 feet), from rating curve extended above 5,000 second-feet; minimum, that of 

Oct. 9, 1940.

Remarks.- Records excellent. No diversion or regulation.

Rating tables, water year 1940-41 (gage height, in feet, 

discharge, in second-feet)

oct. 1 to Jan. J.7

1.3 65 2.5 365 

1.5 92 3.0 573 

l.V 12V 3.5 860 

2.0 200 4.0 1,220 

Note.- Same as following 

table atiove 4.0 feet.

Jan. J.8 to Sept. 30

1.3 

1.5 

l.V 

2.0 

2.5 

3.0

75

105

143

212

377

595

3.5 

4.0 

5.0 

6.0 

V.O

870

1,220

2,140

3,500

5,200

Discharge, in second-feet, water year October 1940to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

60

58

5V

62

63

61

5V

5V

V3

1,080

344

189

168

134

114

105

254

2,660

1,940

998

1,220

698

5S8

V51

532

432

365

332

365

515

550

Nov.

564

494

424

369

343

396

1,180

840

593

489

420

369

335

318

293

276

293

270

244

238

223

209

212

408

452

346

508

919

1,260

820

-

Dec.

V09

670

sve

675

1,540

1,340

3,380

3,100

1,510

1,030

794

664

5V3,

524

4V3

436

432

654

1,280

2,360

1,220

1,140

1,070

1,300

1,380

1,300

998

998

1,110

894

732

Jan.

617

550

511

481

440

412

408

392

477 473-

440

436

564

460

477

704

5,110

3,510

1,550

1,070

870

724

639

624

1,270

1,000

809

696

624

894

1,410

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

2,200

1,880

1,260

1,340

1,040

840

724

644

840

870

751

675

600

557

508

469

439

410

385

365

338

324

316

334

338

422

958

1,140

_

_

-

Secondfoot-days

14,882

14, 105

35,164

28 642

20*967

12, 575

20, 156

8,845

4,230

2, 708 

6,084

177,070

Mar.

840

780

620

539

482

469

447

410

377

346

331

313

299

282

272

266

263

346

452

398

377

439

377

346

346

373

393

365

354

346

327

Maximum

2, 660

1, 260

3,380

3,380

5,110

2 *840 200 

477

3,260

385

197

171 

434

5,110

Apr.

361

320

306

299

405

477

410

373

365

346

309

289

272

286

324

289

263

248 :

239

234

231

234

239

231

223

228

231

231

223

226

May

239

239

253

263

502

724

516

426

377

36E

460

534

416

342

321

1.77C

3,260

1,420

1,000

934

78C

680

639

610

54£

4se

447

443

406

373

377

Minimum

57

209

432

57 

392

316

263

239

200

95

70

119

57

June

373

365

358

331

324

377

385

327

313

324

342

354

313

279

257

254

266

320

324

316

282

272

254

242

234

228

217

210

204

200

Mean

470

1,134

547

924

749

406

290 

650

295

136

87.4 

203

485

July

197

192

185

180

173

169

169

164

158

151

147

14E

141

13E

132

127

127

129

123

119

118 lie

112

110

109

103

102

102

100

99

95

Per

square

mile

6.08

5 . 95

14^4

6.92

11.7

9.48

5 *14 3 67

8 -23

! 72 ilii

2.57

6.14

Aug.

94

97

10V

103

100

94

89

86

85

82

83

81

79

va

V6

V5

V4

74

71

71

vo

71

110

88

85

89

83

82

V9

83

1V3

Sept.

200

154

434

400

202

156

131

119

119

305

234

176

182

269

239

345

302

231

215

210

185

166

156

143

137

133

125

119

121

1V6

Runoff

Inches

V.01

6.64

16.55

94.2V 

13.48

9 .8V 

5.92

4.10

9 »49

4.16

1.99

1.2V

2.86

83.34

Acre-feet

29 520

69 V50

56,810

41,590 24 940

IV, 280

17*. 540

8,390

5,370 

12.0VO

351,200
ELWHA RIVER BASIN 

Elwha River at McDonald Bridge, near Port Angeles, Wash.

23

Location.- Water-stage recorder, lat. 48°03'20", long. 123°34'55", in NEiNWi sec. 33, T. 

30 N., R. 7 W., at site of McDonald Bridge (now removed), half a mile upstream from 

Little River, 7 miles upstream from mouth, and 8 miles southwest of Port Angeles. Datum 

of gage is 200.00 feet above mean sea level, datum of 1929.

Drainage area.- 262 square miles.

Records available.- October 1897 to December 1901, October 1918 to September 1941.

Average discharge.- 27 years, 1,456 second-feet (adjusted for storage since April 1927).

tactrenes.- Maximum discharge during year, 10,800 second-feet (regulated) Jan. 17 (gage 

height, 16.29 feet), from rating curve extended above 5,000 second-feet; minimum, 36 

second-feet (regulated) Oct. 7; minimum daily, 76 second-feet (regulated) July 4. 

1897-1901, 1918-41: Maximum discharge, 26,700 second-feet Dec. 21, 1933 (gage 

height, 10.5 feet, site and datum then in use, from floodmarks), computed on basis of 

spillway and turbine records at Glines Canyon Reservoir; minimum daily, 10 secondfeet Oct. 3, 1938.

Remarks.- Records good except those below 300 second-feet, which are fair. Flow affected 

by dines Canyon Reservoir on Elwha River, lat. 48°00'05", long. 123°41'05", 4 miles 

north of Elwha, which was completed in 1927 for development of power. Usable capacity, 

38,650 acre-feet at elevation 610 feet. Change in contents determined from midnight 

elevations based on two staff-gage readings daily. Flow diverted through Glines 

Canyon power house and returned to river above gage.

Cooperation.- Reservoir gage heights furnished by Crown-Zellerbach Corporation.

Rating tables, water year 1940-41 (gage height, In feet, and discharge, in second-feet) 

(Shifting-control method used Oct. 1-19)

Oct. 1-19 Oct. 19 to Sept. 30 

7.0 40 8.0 320 10-0 1,640 7.7 67 9.0 640 12.0 3,600 

7.2 64 8.5 585 11.0 2,630 6.0 145 9.5 1,040 13.0 4,970 

7.4 104 9.0 S90 12.0 3,760 8.3 250 10.0 1,470 14.0 6,530 

7.7 195 9.5 1,240 13.0 5,090 8.6 390 11.0 2,450 15.0 8,270

Discharge, in second-feet, mater year October 1940 to September 1941

Day

1

2 

s

4

e

6 

7 

8 

9 

10

11 

IS 

13 

14 

16

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

558 

546 

502 

530 

514

t228 

366 

536 

514 

905

1,060" 

925 

t562 

394

546

574 

585 

3,160 

4,910 

f3,380

2,890 

2,000 

2,150 

2,690 

1,740

1,650 

t950 

1,320 

1,260 

1,510 

1,680

Hov.

1,420 

1,270 

f691 

714 

1,070

1,070 

1,660 

1,650 

1,550 

tl,200

884 

1,030 

1,060 

1,040 

1,040

1,050 

t7S9 

720 

1,170 

1,140

1,050 

1,030 

1,060 

 K65S 

732

1,170 

1,090 

1,210 

1,350 

1,350

Month

Oot 

Nor 

Dec

Ca.

Jan 

Feb 

Mar 

Apr 

May 

Jun 

Jul 

Augi 

Sep

Ma

amber.. .........

Lendar year 1940

Ch

ter year 1940-41

Dec.

f99S 

1,290 

1,950 

1,440 

2,340

1,980 

3,120 

t3,630 

2,370 

1,900

1,760 

1,590 

1,550 

1,530 

t919

1,200 

1,600 

1,700 

1,800 

3,910

2,490 

t2,530 

2,030 

2,700 

2,580

2,540 

1,970 

1,930 

tl, 960 

1,450 

1,510

Jan.

1,490 

1,490 

1,490 

1,480 

fl,150

S60 

1,080 

1,110 

1,200 

1,260

1,200 

t956 

902 

1,230 

1,380

1,420 

4,720 

5,660 

f2, 810 

2,360

2,160 

1,780 

1,620 

1,620 

2,330

tl,550 

1,540 

1,450 

1,510 

1,550 

2,470

Feb.

4,230 

f3,100 

2,090 

3,270 

2,530

2,230 

1,930 

1,810 

tl,900 

1,790

1,640 

1,540 

1,520 

1,400 

1,210

tl,150 

1,160 

1,210 

1,150 

1,010

1,040 

1,040 

+1,010 

1,160 

1,030

986 

1,050 

1,060

Mar.

1,560 

fl,540 

1,340 

1,310 

1,230

1,090 

1,010 

1,010 

+1,050 

1,060

1,030 

1,020 

920 

894 

844

t809 

958 

S86 

1,090 

1,140

1,000 

966 

f900 

908

940

870 

968 

1,000 

1,130 

+1,230 

1,060

Observed

Discharge in 

seoond-feet

Maximuni

4,910 

1,660 

3,910

6,750

5,660 

4,230 

1,560 

1,220

3,33O 

1,690 

1,130 

612 

1,220

5,660

Mini228 

658 

919

22

860 

986 

809

746 

968 

978 

76 

37S 

156

76

Mean

1,327 

1,097 

2,009

1,419

1,769 

1,652 

1,057 

980 

1,521 

1,285 

777 

483 

581

1,210

Runoff 

in 

acre-feet

81,590 

65,290 

123, 500

1,030,000

108,700 

91,730 

64, 980 

58,340 

93,500 

76,440 

47,750 

29,690 

34,540

876,000

Apr.

1,120 

1,190 

1,210 

1,150 

1,140

tl,090 

1,090 

929 

956 

956

962 

926 

t914 

856 

836

882 

890 

86S 

846 

f882

841 

746 

850 

901 

906

916 

fl,030 

1,100 

1,210 

1,220

Chang

i 

Glines 

Reser 

(aereMay

1,140 

1,120 

1,190 

tl, 030 

1,170

1,200 

1,160 

1,160 

1,080 

1,030

+968 

1,060 

1,340 

1,380 

1,380

1,410 

3,330 

f2,280 

1,760 

1,740

1,740 

1,770 

2,050 

2,360 

+2,050

1,670 

1,560 

1,580 

1,490 

1,470 

1,470

e in

ents 

n 

Canyon 

voir 

feet)

-90 

+3SO 

+1,070

+340

+210 

-80 

-340 

-1,360 

+1,310 

-1,940 

+580 

+1, 100 

-1,730

-890

June

+1,460 

1,440 

1,440 

1,290 

989

1,250 

1,440 

tl,420 

1,420 

1,260

1,270 

1,590 

1,690 

1,420 

tl, 310

1,250 

1,130 

1,370 

1,220 

1,170

1,160 

+1,140 

1,410 

1,440 

1,150

1,150 

1,110 

978 

+1,020 

1,150

July

1,130 

1,090 

779 

76 

760

t980 

970 

1,030 

994 

936

890 

828 

t797 

842 

824

693 

758 

876 

825 

t743

769 

737 

652 

673 

668

547 

t686 

706 

662 

584 

570

Aug.

487 

450 

t378 

393 

446

444 

500 

481 

475 

t462

515 

478 

482 

530 

518

584 

f475 

462 

434 

433

436 

443 

542 

f457 

501

484 

507 

505 

497 

612 

t558

Sept.

156 

840 

S20 

1,220 

893

608 

+496 

534 

515 

525

478 

497 

499 

t560 

629

562 

678 

664 

624 

652

t583 

446 

449 

505 

529

489 

500 

t480 

515 

470

Adjusted for change 

in reservoir contents

Runoff 

in 

acre-fee

Discharge in 

second- feet

Per 

t Mean square 

mile

81,500 1,325 5.06 

65,670 1,104 4.21 

124,600 2,026 7.73

1,031,000 1,420 5.42

108,900 1,771 6.76 

91,650 1,650 6.30 

64,640 1,051 4.01 

56,980 958 3.66 

94,810 1,542 5.89 

74,500 1,252 4.78 

48,330 786 3.OO 

30,790 501 1.91 

32,810 551 2.10

875,200 1,209 4.61

Runin 

Inches

5.83 

4.70 

8.91

73.74

7-79 

6.56 

4.62 

4.08 

6.79 

5.33 

3.46 

2.20 

2.34

62.61

t Sunday.
24 DUNGENESS RIVER BASIN

Dungeness River near Sequim, Wash.

Location.- Water-stage recorder, lat. 48°00'40", long. 123°07'50", in SWiSEi sec. 12, T.

 29 N., R. 4 W., three-quarters of a mile upstream from Canyon Creek, 4i miles southwest of Sequim, and Hi miles upstream from mouth.

Drainage area.- 156 square miles.

Records available.- June 1937 to September 1941. July 1897 to July 1898 at site about 2

 miles downstream; June 1923 to September 1930 at site half a mile downstream.

Average discharge.- 11 years (1923-30, 1937-41), 333 second-feet.

Extremes.- Maximum discharge during year, 2,400 second-feet Jan. 17 (gage height, 5.47

 feet), from rating curve extended above 1,000 second-feet; minimum, 115 second-feet 

Oct. 8, Sept. 29, 30; minimum gage height, 2.61 feet Oct. 8.

1897-98, 1923-30, 1937-41: Maximum discharge, 5,380 second-feet Dec. 28, 1937 

(gage height, 6.85 feet), from rating curve extended above 900 second-feet; minimum 

observed, 77 second-feet Sept. 10, 1928.

Remarks.- Records good. No diversion or regulation.

Rating tables, water year 1940-41 (gage freight, In feet, and discharge, 

in second-feet)

Oct. 1 to Jan. 17

2.S 152

3.0 204

3.3 306

3.6 436

4.0 

4.5 

5.0

Jan. 18 to Sept. 30

674

1,120

1,730

2.S 

3.0 

3.3 

3.6

141

196

301

436

4.0 674

4.5 1,120

5.0 1,730

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

153 

127 

124 

126 

124

118 

US 

117 

120 

256

228 

176 

179 

162 

152

144 

168 

5S2 

929 

1,210

922 

539 

609 

820 

545

436 

376 

342 

318 

302 

284

Nov.

273 

259 

238 

226 

223

223 

339 

334 

291 

252

238 

223 

216 

216 

220

220 

232 

232 

213 

210

198 

187 

193 

235 

210

198 

280 

403 

557 

427

Dec.

385 

385 

452 

403 

478

441 

462 

545 

478 

412

350 

534 

310 

291 

273

266 

266 

342 

444 

795

538 

755 

601 

595 

539

483 

422 

376 

355 

534 

302

Jan.

288 

273 

266 

259 

245

238 

232 

226 

280 

299

284 

280 

295 

280 

269

269 

1,050 

1,420 

7S8 

582

494 

436 

398 

370 

370

330 

309 

301 

286 

309 

446

Month

Ooto 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apr! 

Hay 

June 

July 

Augu 

Sept

Wa

mber ......................

lendar year 19 4( 

ary

h .........................

1 .........................

ember .......... ..........

ter year 1940-41 ..........

Feb.

vie

59 £ 

511 

640 

620

551 

483 

431 

412 

379

356 

326 

309 

293 

282

274 

263 

252 

249 

242

232 

226 

222 

216 

206

206 

255 

322

Secondfoot-days

10,786, 

7,816 

13,462

141,223

12,172 

10,041 

7,425 

8,288 

12,904 

15,244 

10, 667 

5,391 

4,561

118,757

Mar.

361 

530 

293 

278 

256

246 

238 

235 

228 

228

228 

228 

228 

225 

225

228 

235 

238 

232 

215

206 

202 

193 

190 

199

215 

228 

238 

252 

260 

267

Maximum

1,21C 

557 

79E

1,840

1,420 

71C 

361 

370 

640 

755 

462 

242 

218

1,420

Apr.

348 

339 

297 

297 

' 301

271 

260 

252 

249 

246

232 

225 

228 

238 

249

238 

225 

215 

212 

218

235 

263 

293 

301 

309

335 

343 

343 

356 

370

May

402 

374 

330 

305 

290

267 

260 

246 

232 

235

339 

545 

539 

452 

412

436 

557 

436 

384 

370

374 

417 

545 

640 

627

576 

488 

478 

436 

407 

505

Minimum

117 

187 

266

117

226 

206 

190 

212 

232 

398 

218 

141 

117

117

June

528 

483 

457 

472 

478

557 

647 

545 

522 

588

689 

755 

689 

576 

511

472 

467 

522 

494 

472

436 

472 

438 

441 

417

412 

422 

412 

398 

422

Mean

348 

261 

434

386

393 

359 

240 

276 

416 

508 

344 

174 

152

325

July

457 

462 

441 

412 

417

436 

446 

398 

374 

361

34S 

339 

343 

374 

3SS

388 

398 

412 

393 

330

318 

293 

260 

249 

242

242 

246 

232 

225 

225 

218

Per 

square 

mile

2.23 

1.67 

2.78

2.47

2.52 

2.30 

1-54 

1.77 

2.67 

3.26 

2.21 

1.12 

.974

2.08

Aug.

206 

202 

242 

209 

196

187 

1S7 

190 

187 

1S4

182 

179 

173 

167 

167

164 

162 

162 

167 

164

159 

157 

164 

154 

151

157 

151 

151 

141 

141 

188

Sept.

212 

187 

218 

218 

179

157 

146 

139 

139 

209

170 

159 

149 

146 

139

141 

141 

139 

146 

159

141 

137 

130 

128 

128

128 

119 

117 

119 

121

Runoff

Inches

2.57 

1.86 

3.21

33.66

2.90 

2.39 

1.77 

1.98 

3.08 

3.63 

2.54 

1.29 

1.09

28.31

Acre feet

21,390 

15,500 

26,700

280,100

24,140 

19,920 

14,730 

16,440 

25,590 

30,240 

21,160 

10,690 

9.050

235.600

Peak discharge Oct. 19 (9 a.m.) 1,180 sec. -ft.; Oct. SO (3-46 p.m.) 1,69O sac. -ft. 5 net. El
PUGET SOUND BASINS 25

DOSEWALLIPS RIVER BASIN 

Dosewallips River near Brlnnon, Wash.

Location.- Water-stage recorder, lat. 47°43', long. 123°00', In SWi sec. 24, T. 26 N., R. 

3 W., half a mile upstream from Corrigenda ranger station, 5i miles northwest of 

Brlnnon, and 7i miles upstream from mouth.

Drainage area.- 94 square miles.

Records available.- October 1930 to September 1941.

Average discharge.- 11 years, 463 second-feet.

Extremes.- Maximum discharge during year, 3,400 second-feet Oct. 20 (gage height, 6.06 

feet); minimum, 111 second-feet Oct. 8, 9 (gage height, 1.94 feet).

1930-41: Maximum discharge, 10,900 second-feet Nov. 5, 1934 (gage height, 9.57 

feet), from rating curve extended above 4,500 second-feet; minimum, 65 second-feet 

Dec. 4, 1936 (gage height, 1.71 feet).

Remarks.- Records excellent except those above 1,000 second-feet, which are good. No 

diversion or regulation.

Rating table, water year 1940-41 (gage height, In feet, and discharge, In second-feet)

2.0 

2.2 

2.4

121

160

215

2.7 

3.0 

3.5

317

437

675

4.0 

5.0 

6.0

955

1,880

3,310

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

125

118

116

11S

US

116

116

115

131

572

270

1S5

194

170

150

137

321

1.320

1,700

2,160

1,200

675

1,260

1,330

780

590

486

433

412

412

395

Nov.

391

363

332

313

306

334

933

650

513

433

383

347

325

310

313

310

317

295

278

271

257

244

244

261

247

237

299

497

67S

468

-

Dec.

446

446

576

468

546

504

625

7SO

595

495

433

391

359

340

317

299

313

513

746

1,200

S65

1,060

S35

1,060

1,090

955

762

625

561

509

446

Jan.

412

383

367

347

328

313

306

292

376

40S

408

433

522

459

455

513

1,460

1,760

988

762

660

566

504

477

546

490

446

429

412

459

849

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

1,440

1,020

808

1,060

925

7SO

676

626

650

610

565

518

481

446

424

399

383

367

355

347

336

325

317

306

295

292

390

650

_

_

-

Secondfoot-day s

16,225

11,149

19,150

1S6, 836

17,103

15,789

12,792

14,458

IS, 409

16,951

11,000

5,912

6,227

165,170

liar.

7SO

675

551

481

437

416

399

387

375

367

359

359

355

361

361

363

383

387

383

347

328

32S

310

303

332

379

416

446

472

4S6

483

Maximum

2,160

933

1,200

3,020

1,760

1,440

780

595

9SS

865

490

378

367

2,160

Apr.

595

537

472

490

595

532

546

522

499

463

433

416

408

433

433

399

371

355

355

367

4OS

463

513

504

522

561

670

570

556

570

-

May

600

541

472

446

433

40S

379

359

347

379

575

SOS

675

590

546

685

988

700

575

551

556

625

SOS

925

S35

700

615

605

541

527

615

Minimum

115

237

299

116

292

292 «/\« ouo

355

347

441

225

150

139

115

June

580

532

522

537

556

650

700

595

570

675

7SO

S65

762

660

570

527

637

610

527

486

472

522

637

4S1

460

450

459

450

441

46S

Mean

523 3*78

618

510

552

564

413

482

594

565

355

191

20S

453

July

486

490

459

433

441

450

446

412

387

375

367

359

359

391

408

412

420

424

383

332

328

288

257

244

237

244

247

237

228

231

225

Per 

square 

mile

5.56

3« 96

6.57

5.43

6«S7

6.00

4*39

5.13

6«32

6.01

3 170 10

% >03

2.21

4.82

Aug.

206

197

241

203

191

188

197

203

203

203

197

1S5

182

182

182

178

170

178

182

185

180

170

197

160

160

172

172

160

150

160

378

Sept.

365

299

360

313

237

197

1S2

170

178

367

254

215

200

205

1S2

228

197

175

18S

188

170

160

160

158

166

158

141

139

141

156

-

Runoff

Inches

6.42

4.41

7.58

73 92

6*77

6*26

5.06

5.72

7.28

6

I7T tJ.

4.35

2.34

2.46

65.36

Acre-feet

32,180

22,110

37,980

370 f 600

33,930

31,320

26, 370

2Sj 680

36, 510

33,620

21, 820

11,730

12,350

327,500
26 DUCKABUSH RIVER BASIN

Duckabush River near Brinnon, Wash.

Location.- Water-stage recorder, lat. 47°41'100", long. 123°00'40", in SWiSWi sec. 1, T. 

£5 N., R. 3 W., 4i miles upstream from mouth and 5 miles west of Brinnon.

Drainage area.- 66 square miles.

Records available.- June 1938 to September 1941. August 1910 to December 1911, at

practically sane site but different datum, published as Duckabush River near Duckabush, 

Wash.

Extremes.- Maximum discharge during year, 4,750 second-feet Oct. 23 (gage height, 7.22 

feet); minimum, 49 second-feet Oct. 6, 7, 3, 9 (gage height, 1.49 feet).

1911-12, 1938-41: Maximum discharge, 6,080 second-feet Dec. 15, 1939 (gage height, 

8.07 feet); minimum, 46 second-feet Oct. 8, 9, 1938.

Remarks.- Records good. No diversion or regulation.

Rating tables, water year 1940-41 (gage height, In feet, and dia 

In second-feet)

charge

Oct. 1 to May 16 May 17 to Sept. 30

1.5 50 3.5 660 17 89 3.3 610 

1.7 78 4.0 985 1 9 123 3.7 880 

2.0 135 4.5 1,420 2 2 189 4.3 1,390 

2.5 270 5.0 1,950 2 5 274 5.0 2,120 

3.0 440 6.0 3,130 2 9 418

Discharge, in second-feet, water year Odtober 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

54 

53 

51 

51 

53

51 

50 

50 

54 

281

166 

112 

112 

99 

86

80 

225 

1,520 

1,710 

2,480

1,260 

618 

1,780 

1,840 

765

535 

426 

369 

359 

408 

404

Nov.

422 

380 

328 

292

276

376 

1,820 

848 

570 

444

372 

328 

296 

273 

267

261 

270 

251 

230 

219

207 

194 

191 

207 

205

191 

242 

474 

658 

418

Dec.

372 

369 

448 

369 

560

502 

613 

666 

490 

400

349 

312 

283 

261 

239

222 

252 

728 

1,380 

1,880

1,100 

1,190 

933

1,470 

1,520

1,140 

771 

599 

531 

467 

404

Jan.

362 

328 

309 

289 

267

251 

251 

248 

322 

362

372 

. 397 

552 

448 

444

544 

2,200 

2,140 

978 

671

544 

463 

404 

411 

644

502 

415 

380 

359 

404 

1,380

Feb.

2,060 

1,240 

803 

1,100 

822

644 

544 

490 

655 

561

502 

444 

400 

366 

335

315 

292 

276 

264 

245

236 

227 

219 

213 

202

207 

461 

963

Month Secondonth foot-days

Goto 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

mber ....................:.

lendar year 1940 

ary

... 1

ember .....................

15,902 

11,510 

20,820

57,736

17,641 

15,086 

11,074 

11,216 

15,706 

11,392 

5,592 

3,320 

6,788

ter year 1940-41 .......... 146,047

Mar.

1,140 

771 

552 

448 

394

359 

342 

328 

312 

296

283 

276 

267 

258 

248

261 

270 

302 

342 

302

276 

289 

261 

242 

254

296 

318 

338 

349 

355 

345

Maximum

2,480 

1,820 

1,880

4,050

2,200 

2,060 

1,140 

634 

2,060 

588 

284 

518 

656

2,480

Apr.

415 

380 

342 

404 

613

544 

634 

535 

463 

411

362 

338 

328 

335 

328

299 

273 

258 

248 

254

276 

312 

342 

338 

342

366 

376 

369 

362 

369

May

380 

355 

318 

318 

349

349 

305 

276 

258 

276

394 

575 

470 

408 

380

711 

2,060 

898 

594 

520

492

505 

610 

728 

628

510 

447 

435 

379 

360 

418

June

398 

360 

338 

346 

346

414 

588 

456 

414 

431

510 

566 

496 

418 

368

346 

372 

439 

402 

353

328 

338 

357 

314 

300

294 

287 

271 

268 

274

Minimum Mean

50 513 

191 384 

222 672

50 431

248 569 

202 539 

242 357 

248 374 

258 507 

268 380 

105 180 

81 107 

107 226

50 400

July

284 

277 

262 

246 

235

226 

221 

212

207 

199

192 

187 

187 

189 

192

189 

189 

210 

182 

165

154 

145 

133 

123 

119

118

116 

112 

109 

107 

105

Per 

square 

mile

7.77 

5.82 

10.2

6.53

8.62 

8.17 

5.41 

5.67 

7.68 

5.76 

2.73 

1.62 

3.42

6.06

Aug.

102 

100

129 

114 

105

99 

97 

95 

94 

95

94 

92 

89 

89 

88

86 

83 

82 

82 

82

82 

81 

89 

85 

83

100 

103 

99 

91 

92 

518

Sept.

656 

570 

451 

360 

249

202 

175 

152 

156 

446

314 

237 

207 

210

179

215 

189 

165 

189 

197

165 

150 

139 

131 

133

119 

110 

107 

109 

116

Runoff

Inches

8.96 

6.49 

11.73

88.89

9.94 

8.50 

6.24 

6.32 

8.85 

6.42 

3.15 

1.87 

3.82

82,29

Acre-feet

SJ.,540 

22,830 

41,300

312,900

34,990 

29,920 

21,960 

22,250 

31,150 

22,600 

11,090 

6,590 

13,460

289,700
SKOKOMISH RIVER BASIN 27

North Fork of Skokomish River below Staircase Rapids, near Hoodsport, Wash.

Location.- Staff gage, lat. 47°30'55", long. 123°19'45" (revised), in NWi sec. 4, T. 23 

N., R. 5 W., three-quarters of a mile upstream from Lake Cushman, 2 miles upstream from 

Dry Creek, and Hi miles northwest of Hoodsport.

Drainage area.- 60 square miles.

Records available.- July 1924 to September 1941.

Average discharge.- 17 years, 464 second-feet.

Extremes.- Maximum discharge during year, 6,830 second-feet Jan. 17 (gage height, 7.77 

feet, from graph based on gage readings); minimum observed, 40 second-feet Oct. 9 

(gage height, 1.45 feet).

1924-41: Maximum discharge 23,300 second-feet Nov. 5, 1934 (gage height, 14.4 

feet, from floodmarks), from rating curve extended above 3,200 second-feet; minimum 

recorded, 16 second-feet Sept. 23, 1930 (gage height, 1.12 feet).

Remarks.- Records good. Gage read once daily. No diversion or regulation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet) 

(Shifting-control method used Jan. 18 to Feb. 28, Sept. 11-30)

1.5 

1.7 

2.0 

2.3 

2.6 

3.0

Oct. 1 to May 17

46

74

130

202

295

450

725

1,070

1,510

2,040

3,300

5,150

May 18 to Sept. 30

2.3 136 3.5 715

2.6 268 4.0 1,070

3.0 425

Hote.- Same as preceding 

table above 4.O feet.

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

45

43

43

50

50

44

42

42

47

835

S46

152

148

120

106

97

154

3,610

3,960

3,610

1,710

925

31,500

al,610

925

660

572

520

660

925

890

Nov.

925

725

572

495

472

630

2,040

1,070

758

600

520

450

407

387

387

387

367

348

330

330

a295

a278

262

312

330

312

472

660

855

545

-

Dec.

495

450

630

495

890

758

925

1,070

660

545

472

450

337

348

330

295

312

822

1,810

2,120

1,320

1,150

1,070

31,610

31,820

1,610

925

855

758

630

545

Jan.

495

450

407

387

367

348

348

330

407

428

428

450

3495

a545

600

630

3,280

2,360

1,150

790

630

545

520

545

890

660

545

495

472

660

al,340

Month

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

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

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

Calendar year 1940 . . ......

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

2,040

1,320

925

1,230

925

758

660

600

790

790

660

600

520

472

428

387

367

348

a330

3330

312

295

278

262

278

790

995

1,320

_

_

-

Secondfoot-days

24 341

16)531

26,557

193,109

21 997

19)oiO

15,359

16)961

4 337

3)490

8,238

178,789

Mar.

1,320

1,150

790

660

545

495

3472

450

428

407

387

367

367

348

330

330

330

495

495

428

407

495

407

367

367

428

450

450

472

472

450

Maximum

3,960

2,040

2,120

4,740

3

2 04C

1 ' ^Pf '822

2,27C

19G

1,02C

989

3,960

Apr.

a450

472

a495

545

630

790

822

692

600

545

472

428

407

407

3337

3367

3348

a330

312

312

312

348

387

348

a367

387

387

387

367

348

-

May

348

330

312

312

407

520

337

348

312

312

450

692

428

387

367

1,070

2,270

958

682

650

560

560

590

620

560

502

503

425

360

360

380

Minimum

42

262

295"

42

330

330

312

198

Qfl

63

128

42

June

360

340

302

302

285

321

360

340

285

285

321

360

380

285

253

238

238

340

285

285

268

268

268

238

253

238

211

211

211

198

-

Mean

785

551

857

528

710

679

495

448

547

284

140

113

275

490

July

198

198

198

186

186

174

174

163

163

163

152

152

141

141

141

141

141

141

128

120

116

112

108

102

104

102

98

100

98

98

98

Per 

square 

mile

13.1

9.18

14 3

8.80

11

11.3

7.47

9 . IS

4.73

1 . 88

4.58

8.17

Aug.

93

91

L26

LOO

91

39

86

86

82

80

79

76

76

74

72

72

69

66

66

65

63

172

80

66

63

84

93

95

74

141

1,020

Sept.

989

560

502

402

285

224

198

174

216

530

402

302

253

238

224

224

211

198

302

238

211

186

174

163

a!52

141

137

128

135

139

~

Runoff

Inches

15.09

10.24

16.46

119.68

13.63

" _ 

8.34

10.51

2 . 69

2. 16

5.11

110.82

Acre-feet

48,280

32,770

52,680

383,000

43,630

3o)460

26,680

33,640

16,920

8,600

6,920

16,340

354,600

Note.- Ho gage-height record; dischsrge computed from grsph based on gsge resdings. 

461678 O-42-3
28 SKOKOMISH RIVER BASIN

South Fork of Skokomish River near Union, Wash.

Location.- Water-stage recorder, lat. 47°20'30", long. 123°16'30", In NEi sec. 2, T. 21 

N., R. 5 W., 2i miles upstream from North Fork, 5 miles upstream from Vance Creek, 

and 8 miles west of Union.

Drainage area.- SI square miles.

Records available.- August 1931 to September 1941.

Average discharge.- 10 years, 704 second-feet.

Extremes.- Maximum discharge during year, 12,500 second-feet Jan. 17 (gage height, 9.73 

feet), from rating curve extended above 3,500 second-feet; minimum, 69 second-feet 

Oct. 1.

1931-41: Maximum discharge, 21,600 second-feet Jan. 22, 1935 (gage height, 11.0 

feet), from rating curve extended above 11,000 second-feet; minimum, 62 second-feet 

Sept. 18, 1938.

Remarks.- Records good except those for September, which are poor. No diversion or 

regulation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

69 

76 

80 

83 

86

93 

100 

104 

127 

1,760

798 

384 

314 

258 

223

199 

513 

4,800 

3,780 

4,110

2,600 

1,360 

2,110 

2,780 

1,380

944 

730 

624 

780 

1,360 

1,420

Nov.

1,590 

1,310 

932 

730 

6S2

992 

3,030 

2,090 

1,360 

992

790 

672 

589 

528 

498

4S2 

467 

445 

425 

425

404 

384 

384 

475 

554

505 

572 

1,020 

1,460 

932

Dec.

750 

644 

760 

672 

1,000

1,120 

1,310 

1,740 

1,180 

S54

710 

606 

545 

505 

475

452 

445 

672 

1,720 

3,470

1,740 

1,440 

1,400 

2,410 

2,880

2.7SO 

1,880 

1,670 

.1,590 

1,250 

992

Jan.

854 

760 

691 

634 

5S9

5S9 

624 

624 

606 

615

589 

572 

672 

606 

653

1,200 

4,830 

4,550 

2,160 

1,340

1,030 

854 

760 

790 

1,860

1,360 

1,030 

876 

790 

865 

2,030

Month

Octo 

Hove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

mber ......................

lendar year 1940 .........

ary

ember .....................

ter year 1940-41 ..........

Feb.

2,500 

1,980 

1,490 

1,460 

1,210

1,030 

920 

S21 

1,030 

1,050

1,030 

932

£,\ 

760 

700

644 

59S 

563 

537 

505

482 

452 

452 

460 

475

589 

1,460 

2,070

Secondfoot-days

34,045 

25,719 

39,662

265,730

36,003 

27,021 

19,600 

13,177 

18,111 

7,174 

4,073 

3,595 

10,690

238,870

Mar.

1,570 

1,640 

1,210 

944 

790

720 

662 

5S9 

545 

498

460 

432 

411 

39S

391

365 

365 

4S2 

760 

672

580 

710 

624 

545 

505

490 

482 

452 

445 

445 

418

Maximum

4,800 

3,030 

3,470

5,050

4,830 

2,500 

1,640 

944 

3,580 

320 

183 

580 

910

4,830

Apr.

404 

411 

425 

467 

624

S76 

944 

790 

672 

580

513 

460 

425 

398 

384

378 

358 

346 

339 

333

326 

320

314 

314 

301

301 

295 

301 

289 

2S9

May

283 

289 

301 

352 

572

73O 

537 

432 

371 

326

308 

314

270 

 54 

211

1,040 

3,580 

1,650 

980

790

653 

563 

490 

445 

411

378 

352 

339 

320 

301 

289

Minimum

69 

384 

445

66

572 

452 

365 

289 

211 

183 

110 

85 

150

69

June

283 

283 

258 

252 

240

252 

246 

240 

228 

217

211 

223

217 

211

199

199 

240 

295 

277 

320

295 

270 

258 

240 

228

211 

205 

199 

194 

183

Mean

1,098 

857 

1,279

726

1,161 

965 

632 

439 

584 

239 

131 

116 

356

654

July

183 

172 

167 

167 

161

156 

150 

140 

132 

130

130 

130 

130 

125 

125

125 

125 

125 

120 

120

120 

120 

115 

115 

115

115 

115 

115 

110 

110 

110

Per 

square 

mile

13.6 

10.6 

15.8

8.96

14.3 

11.9 

7.80 

5.42 

7.21 

2.95 

1.62 

1.43 

4.40

8,07

Aug.

110 

120 

130 

115 

110

105 

105 

105 

100 

100

100 

95 

95 

95 

95

90 

90 

90 

85 

85

85 

85 

95 

95 

95

100 

110 

110 

105 

115 

580

Sept.

910 

650 

450 

510 

310

230 

180 

150 

150 

405

650 

460 

400 

385 

340

450 

380 

360 

530 

450

340 

305 

265 

235 

220

205 

195 

190 

185 

200

Runoff

Inches

15.63 

11.81 

18.21

122.01

16.53 

12.41 

9.00 

6.05 

8.32 

3.29 

1.87 

1.65 

4.91

109.68

Peak discharge.- Oct. 18 (9 a.m.) 6,630 sec. -ft.; Jan. 17 (8:30 p.m.) 12,400 see. -ft.

Ac re- feet

67,530 

51,010 

78,670

527,100

71,410 

53,600 

38,880 

26,140 

35,920 

14,230 

8,080 

7,130 

21,200

473,800

Note.- Stage-discharge relation affected by obstruction which diverted flow from gage, July 7 to 

Sept. 30; discharge confuted on basis of 6 discharge measurements and records for Wynooehee River at 

Oxbow, near Aberdeen. Shifting-control method used Oct. 1 to July 6.
NISQUALLY RIVER BASIN 29

Nisqually River near Alder, Wash.

Location.- Water-stage recorder, lat. 46 046'05", long. 122°16'05", in SWi sec. 23, T. 15 

N., R. 4 E., 2i miles soutlieast of Adler and 8 miles downstream from Mineral Creek.

Drainage area.- 252 square miles.

Records available.- August 1931 to September 1941.

Average discharge.- 10 years, 1,206 second-feet.

Extremes.- Maximum discharge during year, 5,010 second-feet Jan. 18 (gage height, 6.17 

feet); minimum, 182 second-feet Oct. 5, 6, 9 (gage height, 1.50 feet).

1931-41: Maximum discharge, 25,000 second-feet Dec. 22, 1933 (gage height, 13.2 

feet), from rating curve extended above 10,000 second-feet; minimum, 142 second-feet 

Nov. 3, 1935 (gage height, 1.31 feet).

Remarks.- Records excellent. No diversion or regulation.

Cooperation.- Gage-height record collected in cooperation with city of Tacoma.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, 

in second-feet)

Oct. 1-11

1.6 217

1.8 293

2.0 380

2.3 529

Oct. 11 to Sept. 30

1.7 

2.0 

2.3 

2.6

S34 

360 

495 

646

3.0 

3.5 

4.0 

4.5

1,230

1,730

2,360

5.0 

6.0

3,030

4,640

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24

25

26 

27 

28 

29 

30 

31

Oct.

314 

239 

228 

217

206

206 

232 

228 

203

510

803 

382 

500 

391 

330

304 

369 

481 

490 

505

529 

391 

356 

997 

761

548 

454 

400 

395 

727 

1,030

Nov.

997 

357 

702 

604 

533

486 

614 

702 

674 

58S

538 

490 

449 

436 

426

431 

440 

481 

431 

422

426 

391 

378 

449 

533

495 

732 

1,300 

3,470 

2,120

Dec.

1,560 

1,370 

1,240 

1,110 

1,440

1,670 

1,420 

1,240 

1,110 

 960

857 

761 

702 

674 

625

583 

548 

558 

688 

1,940

1,460 

1,320 

1,110 

1,030 

1,030

' 1,070 

1,110 

1,030 

960 

890 

824

Jan.

761 

702 

674 

646 

674

702 

646 

620 

614 

620

61'4 

614 

674 

702 

702

752 

1,780 

4,290 

2,390 

2,120

1,620 

1,370 

1,150 

1,030 

1,370

1,460 

1,190 

1,030 

960 

925 

1,110

Month

Ooto 

Nove 

Dece

 Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 194C 

ary

ember .....................

+ ^r year 1940-41 ..........

Feb.

1,460 

1,280 

1,110 

997 

S90

824 

792 

732 

702 

702

674 

620 

588 

553 

533

514 

495 

472 

449 

444

436 

426 

422 

463 

431

408 

554 

824

Seoondf oo t-days

13,726 

21,595 

32,890

343,540

34,992 

18,795 

17,817

23 ) 061 

19,314 

17,360 

13,097 

17,336

255,722

Mar.

690 

960 

824 

732 

646

614 

578 

563 

543 

524

505 

486 

458 

449 

444

440 

454 

674 

674 

593

529 

538 

505 

472 

458

467 

472 

509 

533 

674 

609

Maximum

1,030 

3,470 

1,940

4,300

4,290 

1,460 

960 

1,030 

2,620 

824 

824 

533 

1,030

4,290

Apr.

390 

1,030 

824 

761 

824

960 

890 

824 

824

761

702 

646 

625 

620

646

609 

573 

543 

514 

509

524 

548 

57S 

573

573

588 

553 

524

56S 

630

May

5S8 

553 

573 

529 

674

625 

568 

543 

500 

490

630 

960 

792 

674 

625

892 

2,620 

2,130 

1,620 

1,320

1,110 

1,070 

1,070 

1,030 

997

890 

890 

824 

761 

702 

761

Minimum

203 

378 

546

203

614 

408 

440 

509 

490 

533 

336 

275 

330

203

June

732 

674 

646 

646 

674

702 

732 

635 

625 

630

732 

824 

792 

674 

604

543 

53S 

674 

702 

732

630 

646 

646 

578 

538

533 

543 

543

568 

573

Mean

443 

7gO 

1,061

952

1,129 

671 

575 

675 

905 

644 

576 

422 

578

701

July

604 

593 

635 

578 

578

646 

625 

543 

543 

548

543 

543 

593 

674 

761

792 

824 

732 

674 

588

568 

533

45S 

426 

386

436 

477 

477 

490 

495 

477

Per 

square 

mile

1.76 

2.S6 

4.21

3.73

4.48 

2.66 

2.28 

2.68 

3.59 

2.56 

2.29 

1.67 

2.29

2.78

Aug.

408 

37S 

336 

351 

334

364 

444 

500 

505 

533

505 

458 

454 

477 

495

472 

495 

481 

472 

458

477 

444 

45S 

356 

356

426 

326 

404 

317 

275 

2SS

Sept.

330 

454 

677 

1,030 

824

604 

481 

426 

431 

408

568 

495 

481 

630 

890

761 

732 

674 

674 

674

625 

583 

563 

543 

529

529 

454 

413 

404 

449

Runoff

Inches

2.03 

3.19 

4.85

51.44

5.16 

2.77 

2.63 

2.99 

4.14 

2.35 

2.64 

1.93 

2.56

37.74

Acre-feet

27,230 

42,830 

65,240

691,300

69,410 

37,230 

35,340 

40,140 

55,660 

38,310 

35,420

34)390

507,200
30 NISQUALLY RIVER BASIN

Little Nisqually River near Alder, Wash.

Location.- Water-stage recorder, lat. 46°47'20", long. 122°18'45", in NWi sec. 16, T. 15 

N., R. 4 E., 1,500 feet upstream from mouth, 3,000 feet upstream from diversion dam of 

Tacona municipal power plant on Nisqually River, and 14 miles southwest of Alder.

Drainage area.- 27.2 square miles.

Records available.- August 1920 to September 1941.

Average discharge.- 21 years, 119 second-feet.

Extremes.- Maximum discharge during year, 1,550 second-feet Jan. 18 (gage height, 4.93 

reet); minimum, 7.4 second-feet Oct. 9 (gage height, 0.59 foot).

1920-41: Maximum discharge, 2,430 second-feet Dec. 20, 21, 1933 (gage height, 6.8 

feet); minimum, 0.9 second-foot July 17, 1926.

Remarks.- Records excellent except those for periods of no gage-height record, which are 

fair. No diversion or regulation.

Cooperation.- Gage-height record collected in cooperation with city of Tacoma.

Rating tables, water year 1940-41 (gage height, In feet, and discharge, 

In second-feet)

Oct. 1 to Jan. 18

1.0 34

1.2 60

1.5 113

1.7 154

2.0 223

2.5 

3.0 

3.5 

4.0

360

540

765

1,020

Jan. 19 to Sept. 30

0.6 7.7 1.2 62 

.8 18 1.5 113 

1.0 36

Note.- Same aa preceding 

table above 1.5 feet.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

8.7 

8.4 

9.0 

9.4 

8.7

8.0 

7.7 

7.7 

7.7 

14

36 

20 

29 

23

18

a!5 

a!5 

15 

16 

22

35 

a25 

a20 

a!30 

a95

62 

43 

34 

42 

a!20 

a200

Nov.

a!80 

a!50 

allO 

90

71

60 

118 

156 

127 

98

a80 

a65 

a55 

a50 

46

45 

45 

46 

40 

38

38 

34 

32 

66 

92

80 

80 

250 

375 

238

Dec.

163 

129 

121 

111 

192

218 

172 

135 

107 

89

78 

65 

60 

56 

50

47 

46 

49 

137 

464

274 

199 

165 

163 

176

206 

218 

190 

161 

139 

119

Jan.

101 

89 

78 

75 

73

83 

85 

82 

83 

94

96 

96 

99

105 

113

123 

610 

1,130 

492 

298

221 

172 

139 

131 

245

285 

226 

183 

154 

137 

186

Month

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 1940 

ary .

h ....................

1 .................. ......

st ................. ......

ember .....................

ter year 1940-41 ..........

Feb.

271 

226 

190 

154 

129

111 

98 

86 

86 

87

79 

76 

70 

64 

61

54 

50 

48 

46 

43

41 

37 

38 

47 

41

37 

71 

115

Secondfoot-days

1,104.3 

2,955 

4,499

37,596.2

6,084 

2,456 

2,265 

1,531 

2,684 

1,131 

485 

336.4 

1,228

26,758.7

Mar.

167 

216 

167 

129

105

91 

77 

f65 

62 

55

51

48 

46 

41 

37

36 

37 

87 

87 

74

64 

66 

62 

56 

51

48 

46 

43 

46 

59 

46

Maximum

200 

375 

464

901

1,130 

S71 

216 

109 

512 

56 

26 

20 

92

1,130

Apr.

54 

58

50 

50 

79

109 

98 

86 

80 

79

71 

64 

58 

54 

51

48 

44 

42 

38 

36

35 

33 

32 

29 

26

27- 

27 

25 

24 

24

May

23 

23 

31 

36

61

64 

58 

52 

46 

41

37 

37 

34 

33 

33

109 

512 

330 

209 

150

117 

96 

80 

70 

59

58 

58 

61 

56 

51 

59

Minimum

7.7 

32 

46

7.0

73 

37 

36 

24 

23 

25 

11 

8.0 

15

7.7

June

56 

51 

48 

44 

42

42 

41 

38 

36 

34

32 

31 

29 

28 

26

25 

26 

36 

44 

56

51 

46 

41 

36 

36

38 

33 

30 

28 

27

Mean

35.6 

98.5 

145

103

196 

87.7 

73.1 

51.0 

86.6 

37.7 

15.6 

10.9 

40.9

73.3

July

26 

24 

23 

22 

21

20 

20 

18 

18

17

17 

17 

16 

15 

15

14 

14 

14 

13 

13

13 

12 

12 

12 

12

12 

11 

11 

11 

11 

11

Per 

square 

mile

1.31 

3.62 

5.33

3.79

7.21 

3.22 

2.69 

1.88 

3.18 

1.39 

.574 

.401 

1.50

2.69

Aug.

11 

11 

14 

13 

12

11 

10 

10 

9". 6 

9.2

9.6 

11 

9.6 

9.2 

9.2

8.8 

8.8 

8.4 

6.4 

8.4

8.0 

8.0 

12 

9.6 

9.6

13 

13 

20 

17 

12 

12

Sept.

15 

22 

23 

36 

41

32 

26 

21 

20 

42

42 

37 

36 

42 

68

65 

66 

58 

72 

32

71 

56 

46 

39 

33

31 

26 

24 

22 

24

Runoff

Inches

1.51 

4.04 

6.15

51.40

8.32 

3.36 

3.10 

2.09 

3.67 

1.55 

.66 

.46 

1.68

36.59

Acre-feet

2,190 

5,860 

8,920

74,570

12,070 

4,870 

4,490 

3,040 

5,320 

2,240 

962 

667 

2,440

53,070

a Ho gage-height record; discharge computed on basis of records for Ulsqually River near Aider 

and Shookumchuck River near Centralla.

f Commuted on basis of partly estimated gage-height record.
NISQUALLY RIVER BASIN 

Mashel River near La Grande, Wash.

31

Location.- Water-stage recorder, lat. 46 0 51'27n , long. 122 0 18'12n , In NEi sec. 21, T. 16 

N., R. 4 E., 2 miles upstream from mouth and 2 miles northeast of La Grande. Datum of 

gage Is 619.35 feet above mean sea level, datum of 1929.

Drainage area.- 79 square miles.

Records available.- October 1940 to September 1941.

Extremes.- Maximum discharge during year, 1,320 second-feet Jan. 18 (gage height, 5.81 

reet); minimum, 12 second-feet Aug. 20 (gage height, 2.67 feet).

Remarks.- Records excellent except those for periods of no gage-height record, which are 

rair. Small diversion for city of Eatonvllle. No regulation.

Rating table, water year 1940-41 (gage height. In feet, and discharge, 

In second-feet)

2.7 14 3.5 103 4.6 485 

2.9 25 3.7 145 5.0 700 

3.1 43 4.0 235 5.5 1,060 

3.3 69 4.3 350

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

1.0

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

ase

a2S 

a2g 

28 

26

23 

20

18 

18 

39

53 

38 

65

se

41

33 

a31 

a31 

a31 

a34

a56 

a 49 

a55 

a210 

a!60

a!20 

a95 

74 

66 

135 

2S6

Nov.

298 

270 

194 

152

121

101 

150 

232 

224 

170

145 

123 

105 

101 

99

94 

105 

170 

130

115

130 

109 

99

111 

115

101 

222 

497 

970 

5SO

Dec.

408 

318 

314 

274 

368

440 

334 

2S2 

238

191

162 

141 

121 

107 

99

96 

92 

92

111 

476

368 

274 

232 

228 

207

224 

310 

278 

249 

238 

221

Jan.

176

145 

134 

134 

132

165 

150 

134 

130 

121

115 

107 

111 

123 

141

136 

310 

1,100 

618 

418

310 

242 

194 

165 

232

270 

207 

176 

158 

148 

179

Feb.

26C 

194 

16£ 

142 

122

112 

109 

98 

9S 

122

10!

9e

9£ 

8£ 

77

7£ 

69 

66 

63 

61

56 

55 

54 

62 

71

58 

tl 

1S1

Month SecondMonttl foot-days

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apr! 

May 

June 

Julj 

Augu 

Sept

Wa

lendar year 

ary

1,965 

6,033 

7,493

h .........................

st ........................

ember .....................

6,881 

2,765 

2,733 

4,872 

4,869 

3,410 

811 

649 

3,237

ter year 1940-41 .......... 45,718

Mar.

160 

173 

141 

121 

101

94 

S5 

S3 

SO 

71

65 

5S 

55 

50 

48

45 

45 

83 

105 

85

71 

77 

75 

66 

58

55 

54 

51 

66 

274 

13S

Maximum

286 

970

476

-

1,100 

260 

274 

565 

624 

246 

53 

42 

27S

1,100

Apr.

472 

565 

338 

249 

256

359 

290 

221 

204

191

162 

141 

125 

111 

130

117 

109 

98 

89 

S3

72 

69 

63 

58 

53

53 

55 

49 

45 

45

May

47 

61 

94 

89 

152

141 

121 

121 

96 

80

71 

107 

87 

S7 

89

107 

624 

464 

294

210

162 

132 

109 

92 

80

77 

190 

260 

221 

168 

256

Minimum

18 

94 

92

-

107 

54 

45 

45 

47 

56 

16 

13 

27

13

June

246 

191 

152 

127 

109

127 

158 

134 

138 

125

105 

90 

SO 

72 

69

62 

66

113 

194 

214

162 

123 

101 

S6 

74

68 

61 

69 

59

56

Mean

63.4 

201 

242

-

222 

98.8 

8S.2 

162 

157 

114 

26.2 

20.9 

108

125

July

63 

48 

44 

41 

38

35 

33 

31 

30 

27

27 

27 

26 

25 

24

22 

21 

21 

21 

21

20 

19 

18 

18 

18

18

18 

17 

17 

17 

16

Per 

square 

mile

O.S03 

2.64 

3.06

-

2.81 

1.25 

1.12 

2.05 

1.99 

1.44 

.332 

.265 

1.37

1.58

a No gage-height record; discharge computed on basis of records for Shookumchuc 

Centralia.

Aug.

16 

16 

22 

31 

23

20 

18 

16 

16

16

14 

17 

17 

16 

14

16

14 

14 

13 

13

13 

13 

40 

31 

23

42 

27 

37 

35 

26 

23

Sept.

27 

60 

107

1S2 

214

141 

90 

62 

63 

90

96 

79 

72 

122 

278

191 

173 

165 

141 

166

136 

109 

90 

77 

66

63 

56 

51 

50 

53

Runoff

Inches

0.93 

2.S4 

3.63

-

3.24 

1.30 

1.29 

2.29 

2.29 

1.61 

.38 

.31 

1.52

21.53

-k River

Acre feet

3,900 

11,970 

14,860

-

13,660 

5,480 

5,420 

9,660 

9,660 

6,760 

1,610 

1,290 

6,420

90,680

near
32 PUYALLUP RIVER BASIN

Puyallup River near Orting, Wash.

Location.- Water-stage recorder, lat. 47°02'30", long. 122°12'20", in SWi sec. 17, T. 18 

N., R. 5 E., 4 miles south of Orting and 7$ miles upstream from Carbon River.

Drainage area.- 170 square miles.

Records available.- September 1931 to September 1941.

Average discharge.- 10 years, 695 second-feet.

Extremes.- 1939-40: Maximum discharge during water year, 5,600 second-feet Dec. 15

(gage height, 8.04 feet); minimum, 92 second-feet (regulated) Oct. 19; minimum daily, 

134 second-feet (regulated) Oct. 18.

1940-41: Maximum discharge during water year, 5,600 second-feet Nov. 29 (gage 

height, 7.90 feet); minimum, 53 second-feet (regulated) Mar. 16; minimum daily, 207 

second-feet (regulated) Feb. 21, 22, 23, Mar. 15, 16.

1931-41: Maximum discharge not determined (occurred Dec. 9 or 10, 1933, when waterstage recorder was not operating); minimum, that of Mar. 16, 1941; minimum daily, 123 

second-feet (regulated) (revised) Dec. 4, 1936.

Revisions: The figures of maximum, minimum, and minimum daily discharge for some 

water years have been revised, as shown in the following table. They supersede those 

published in the water-supply papers indicated.

Watersupply 

Paper

832 

862 

882

Water 

year

1936-37 

1937-38 

1938-39

Maximum

Date

Apr. 14 

Apr. 18 

Feb. 15

Gage height 

(feet)

7.37 

-9.14 

7.64

Discharge 

(sec. -ft.)

4,640 

8,680 

5,110

Minimum

Date

(a> 

Oct. 6 

Oct. 9

Discharge 

(sec. -ft.)

(a) 

121 

143

Minimum daily

Date

Dec. 4 

Oct. 5-7 

Sept. 13, 14

Discharge 

(sec. -ft.)

b!23 

192 

192

a Not determined; affected by regulation. b Affected by regulation.

Remarks.- Records fair. Water that is diverted for Electron plant of Puget Sound Power 

& Light Co. is returned to river above gage. Slight regulation due to pondage in 

connection with operation of Electron power plant.

Revisions.- Revised figures of discharge for water years 1937, 1938, and 1939 are given 

herein. They supersede those published in Water-Supply Papers 832, 862 and 882.

Discharge, In second-feet, 1936-41 

1936-37

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

e250

6240

6230

e350

e340

62SO

6260

6250

6290

e270

6250

6230

6210

e280

eSOO

6255

6240

e230

e220

6215

207

192

207

223

207

192

192

178 

178

165

165

HOT.

150

143

143

165

152

150

145

143

136

136

136

138

138

134

131

136

192

165

152

178

178

165

165

152

178

165

165

165 

152

152

Dec.

145

145

127

123

e!52

e700

800

721

645

544

484

456

721

721

645

513

513

762

1,210

804

762

1,650

2,650

1,450

994

721

544

430 

380

357

314

Jan.

294

275

257

257

257

223

165

165

192

178

178

192

192

192

239

239

223

223

192

192

138

152

192

207

207

207

207

207 

192

178

150

Feb.

192

192

192

207

239

223

223

223

207

207

257

314

275

257

a250

a450

a700

a540

430

380

804

1,580

1,160

994

850

762

721

645

_

-

Mar.

721

994

994

944

1,210

1,210

944

304

850

804

721

762

850

804

721

683

610

544

484

456

430

456

456

456

430

430

404

380

357

404

576

Apr.

645

544

484

513

484

456

430

404

484

576

576

610

1,650

2,820

2,430

1,790

1,330

1,100

944

1,050

1,160

1,100

994

850

850

850

304

762 

683

645

-

Hay

610

804

1,210

1,330

994

850

804

762

762

762

S04

762

944

944

895

350

S04

S04

762

683

683

721

683

762

895

850

804

804 

683

610

645

June

850

1,210

1,330

1,160

1,100

1,160

1,270

1,270

1,210

1,390

1,100

1,050

994

1,100

1,330

1,390

1,330

1,520

1,580

1,360

2,320

2,160

1,940

1,580

1,270

1,160

1,210

1,330 

1,580

1,450

"

July

1,330

1,050

994

1,050

944

762

804

650

350

395

850

850

304

762

721

804

895

1,050

350

683

683

683

683

762

762

721

721

721 

645

576

456

Aug.

404

380

430

513

610

610

576

544

544

683

850

683

544

404

357

404

484

513

456

456

456

513

513

380

357

357

314

239 

294

380

456

Sept.

380

357

404

430

1,390

762

544

513

484

456

484

513

513

513

576

513

430

430

404

430

357

294

239

239

257

336

357

294 

239

257

a No gage-height record; discharge computed on basis of records for nearby streams.

e Qage-helght record faulty; discharge computed on basis of records for nearby streams.
PUYALLUP RIVER BASIN

Discharge, In second-feet, of Puyallup River near Ortlng, Wash., 1936-41--0ontlmied

1937-38

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

16

19

20

21

22

23

24

25

26

27

00«5O

29

30

31

Oct.

294

223

207

207

192

192

192

207

223

223

239

257

239

239

223

357

380

294

239

645

610

513

430

336

336

404

645

994

850

610

576

Nov.

513

380

380

357

357

294

357

2,650

1,860

1,390

1,210

1,160

1,580

1,860

1,650

1,270

1,050

850

994

1,790

1,650

1,580

1,650

1,390

1,940

1,790

2,320

2,320

1,330

1,050

-

Dec.

895

804

804

721

683

645

610

576

544

895

994

944

762

895

804

994

1,450

1,330

1,050

895

804

721

645

645

576

762

1,050

3,780

2,650

1,940

1,390

Jan.

1,160

994

895

721

645

645

610

576

544

683

683

850

994

2,650

2,480

1,330

1,050

944

850

721

762

850

762

721

645

610

576

610

610

576

544

Feb.

544

513

484

430

430

484

456

430

404

404

380

380

380

404

357

357

336

336

336

357

357

336

357

357

336

357

380

430

-

-

"

Mar.

456

484

430

404

544

544

456

430

404

380

380

357

404

430

484

610

513

610

645

576

513

484

544

544

544

456

513

484

430

357

380

Apr.

357

336

357

404

380

357

357

404

544

484

456

430

456

430

430

513

2,010

4,420

2,320

1,790

1,330

1,160

994

895

804

721

683

645

721

804

~

May

804

683

610

610

576

544

484

513

513

484

762

944

944

804

804

762

683

576

544

610

721

895

1,050

1,160

1,210

1,160

1,160

1,050

850

762

646

June

645

683

683

762

850

895

1,050

804

576

456

484

610

683

576

576

576

544

430

430

544

762

1,050

1,160

994

762

645

610

646

762

683

July

544

513

484

484

513

576

645

721

645

576

544

544

721

944

1,050

994

850

762

762

804

944

944

850

721

762

804

762

683

645

576

576

Aug.

484

380

404

513

576

576

513

430

456

456

430

357

380

850

544

513

513

484

456

456

484

430

404

456

544

645

645

513

484

456

513

Sept.

544

683

683

576

404

380

336

294

294

380

430

456

456

430

456

456

456

544

513

430

456

456

430

430

336

380

380

430

404

380

Peak discharge.- Dec. 28 (4:50 p.m.) 4,420 sec.-ft.; Apr. 18 (3:55 a.m.) 8,680 sec. 

figures supersede those published In Water-Supply Paper 862.

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

336

380

456

314

314

257

239

239

223

456

804

544

762

357

275

257

257

223

223

239

239

223

207

239

257

294

380

314

380

294

314

Nov.

257

223

1,100

994

610

430

380

404

404

380

336

314

357

456

576

1,860

1,580

994

804

944

721

544

456

430

404

380

380

357

380

430

-

Dec.

645

1,050

1,100

1,650

2,160

1,390

2,480

2,480

1,580

1,050

804

610

513

484

430

380

357

314

294

294

294

275

357

430

484

404

484

683

645

683

804

Jan.

1,520

1,720

1,450

1,210

994

721

645

762

683

994

850

762

645

544

610

544

762

895

895

721

576

513

484

645

645

576

576

610

576

513

456

Pet.

404

380

357

336

357

404

380

336

314

314

380

1,450

1,050

1,580

3,190

1,860

1,330

1,050

850

683

610

544

484

456

513

456

513

513

-

-

Mar.

456

456

484

456

430

430

430

404

380

357

357

380

404

380

404

576

645

683

762

850

994

1,160

1,390

1,450

1,330

1,050

850

721

610

576

576

Apr.

610

645

683

610

544

513

484

513

544

544

513

544

484

430

404

404

456

610

721

721

804

762

683

576

544

484

456

513

721

610

-

May

544

544

544

576

513

456

430

430

513

544

610

683

804

1,050

1,210

1,160

944

683

544

456

576

576

544

513

610

721

645

1,330

2,160

1,270

895

June

645

544

544

544

762

850

721

721

721

721

721

762

762

762

721

645

804

994

1,390

1,580

1,270

1,100

944

721

721

645

683

804

1,050

994

-

July

804

762

944

895

721

645

610

610

721

944

1,050

850

895

804

804

683

544

544

544

544

544

683

762

850

850

944

1,100

al.OOO

a900

a780

a660

Aug.

576

645

762

683

683

645

576

645

721

762

721

683

610

576

544

576

576

544

610

645

610

683

544

576

683

513

513

456

314

314

456

Sept.

576

484

430

484

456

336

257

357

380

40 >

404

257

192

192

336

404

404

357

380

544

610

544

380

357

275

275

336

223

207

239

~

a No gage-height record; discharge computed on basis of records for nearby streams.
34 PUYALLUP RIVER BASIN

Discharge, In second-feet, of Puyallup River near Ortlng, Wash., 1936-41 Continued

1939-40

Day

1

2

3

4

6

6

7

8

9

10

11

12

13

14

16

16

17

18

19

20

21

22

23

24

26

26

27

28

29

30

31

Oct.

275

192

178

357

430

257

207

178

178

178

165

192

207

192

178

165

178

134

314

239

207

207

239

257

178

223

294

544

380

336

257

Nov.

207

178

178

152

150

178

1,100

721

513

380

544

430

404

404

336

314

294

294

257

257

239

380

257

257

223

178

165

165

165

357

-

Dec.

336

645

513

456

430

484

484

1,210

1,100

1,450

944

721

610

683

2,650

3, 380

2,650

1,720

1,580

1,450

1,100

944

762

683

576

544

513

683

944

895

1,100

Jan.

1,210

994

804

762

683

576

513

484

456

456

430

404

380

380

357

357

357

336

314

294

294

275

275

275

257

294

456

430

456

404

380

Feb.

357

336

357

357

484

2,480

1,790

1,450

1,940

1,940

1,330

1,050

1,050

850

762

721

721

645

610

544

484

484

484

484

804

944

850

994

944

-

Mar.

895

1,050

850

850

895

721

1,210

1,450

1,100

944

804

721

645

576

610

762

683

610

544

513

513

484

484

610

576

610

645

645

645

850

721

Apr.

645

576

513

484

456

404

456

544

645

610

544

544

683

645

544

484

430

484

430

430

380

380

683

895

762

721

645

804

850

895

-

May

1,520

1,390

1,050

944

994

944

804

804

804

895

804

721

645

610

576

513

544

576

610

610

576

610

721

645

544

456

404

404

430

484

645

June

513

544

544

456

380

357

430

404

404

484

544

683

762

576

544

544

484

576

645

576

456

404

456

544

645

576

456

456

484

513

"

July

544

576

544

484

484

456

456

513

513

544

683

645

544

544

610

576

513

456

456

484

544

513

484

404

380

484

576

544

544

484

380

Aug.

336

314

357

404

513

544

544

544

544

456

513

576

456

430

404

456

544

576

645

645

544

513

513

544

576

544

610

484

513

610

513

Sept.

513

544

430

336

336

357

430

513

645

895

762

804

610

484

430

430

404

456

357

357

404

430

a460

a430

a440

a470

a580

a450

a420

404

~

a No gage-height record; discharge computed on basis of records for nearby streams.

Day

1

2

3

4

6

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

380

294

314

314

294

275

275

294

275

610

804

544

576

430

380

336

456

683

721

850

610

357

336

850

610

430

357

336

314

456

544

Nov.

513

484

430

380

336

314

404

404

380

357

336

314

294

294

294

294

336

f357

f314

294

294

275

257

336

357

314

645

1,580

3,580

1,580

Dec.

1,160

944

944

850

994

944

804

721

645

544

484

456

404

380

380

357

357

357

404

850

576

544

456

430

404

404

456

430

430

404

380

Jan.

357

314

314

314

314

357

336

314

314

314

314

314

336

336

314

294

645

1,330

895

683

544

513

484

456

456

484

430

404

357

357

404

Feb.

484

430

380

336

336

314

314

275

294

336

294

294

257

257

239

239

223

239

223

223

207

207

207

223

223

223

275

430

_

_

-

liar.

430

430

357

294

275

257

257

239

275

257

223

223

223

223

207

207

223

257

239

239

223

239

275

257

257

239

239

239

239

380

314

Apr.

484

645

484

430

404

456

404

404

404

404

380

336

380

380

380

357

357

336

314

314

336

336

336

336

336

336

314

314

314

314

-

May

336

336

357

357

404

357

357

357

336

336

380

610

513

456

430

513

895

762

610

576

544

544

576

610

576

544

576

544

513

456

544

June

544

513

484

456

456

513

576

513

513

513

610

645

645

544

513

456

456

544

576

576

513

544

513

456

456

430

430

430

456

484

-

July

484

513

576

544

576

610

576

513

513

513

544

544

576

645

721

804

850

762

721

576

610

513

456

430

404

456

484

513

513

513

. 484

,Aug.

430

404

430

404

404

456

544

645

683

645

645

610

544

610

683

610

683

683

610

610

645

610

645

456

513

484

380

380

357

3S6

380

Sept.

404

513

804

1,100

895

610

484

430

430

645

484

430

430

513

683

576

576

484

484

456

430

404

404

404

404

430

357

336

3S6

404

-

f Computed on basis of partly estimated gage-height record.
PUYALLUP RIVER BASIN 35

Monthly- discharge. In second-feet, of Puyallup River near Opting, Wash., 1936-41

Month

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

Water year 1936-37 ........

Calendar year 1937 ........

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

Calendar year 1938 ........

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

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

Water year 1938-39 ........

Mav. ......

Water year 1939-40 ........

March

Mav. ....... ...

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

Secondfoot-daya

7,296 

4,600 

21, 183

240,242

6,362 

13,474 

20,889 

28,068 

25.280 

41,204 

25,211 

14,704 

13,395

221,666

11,576 

38,972 

32,258

271,393

27,291 

11,112 

14,790 

25,992 

23,917 

20,930 

21,943 

15,345 

13,283

257,409

10,296 

17,885 

25,608

228,392

24,097 

21,094 

20,431 

17, 130 

23,078 

24,846 

23,991 

18,445 

11,080

237,981

7,516 

9,677 

32,240

233,625

14,343 

26,246 

23,216 

17,566 

22,277 

15,440 

15,962 

15,765 

14,571

214, 819

14,305 

16,347 

17,893

213,931

13, 598 

7,982 

8,236 

11,325 

15, 305 

15,358 

17,537 

16,619 

15,340

169,745

Maximum

350 

192 

2,650

3,600

294 

1,580 

1,210 

2,820 

1,330 

2,320 

1,330 

850 

1,390

2,820

994 

2,650 

3,780

3,780

2,650 

544 

645 

4,420 

1,210 

1,160 

1,050 

850 

683

4,420

804 

1,860 

2,480

4,420

1,720 

3,190 

1,450 

804 

2,160 

1,580 

1,100 

762 

610

3,190

544 

1,100 

3,380

3,380

1,210 

2,480 

1,450 

895 

1,520 

762 

683 

645 

895

3,380

850 

3,580 

1,160

3,580

1,330 

484 

430 

645 

895 

645 

850 

683 

1,100

3,580

Minjjnma

165 

131 

183

123

138 

192 

357 

404 

610 

850 

456 

239 

239

123

192 

294 

544

138

544 

336 

357 

336 

484 

430 

484 

357 

294

192

207 

223 

275

207

456 

314 

357 

404 

430 

544 

544 

314 

192

192

134 

150 

336

134

257 

336 

484 

380 

404 

357 

380 

314 

336

134

275 

257 

357

257

294 

207 

207 

314 

336 

430 

404 

336 

336

207

Mean

235 

153 

683

656

205 

481 

674 

936 

815 

1,373 

813 

474 

446

607

373 

1,299 

1,041

744

880 

397 

477 

866 

772 

698 

708 

495 

443

705

332 

596 

826

626

777 

753 

659 

571 

744 

828 

774 

595 

369

652

242 

323

1,040

640

463 

905 

749 

586 

719 

515 

515 

509 

486

587

461 

545

577

585

439 

285 

266 

378 

494 

512 

566 

533 

511

465

Per 

square 

mile

1.38 

.900 

4.02

3.86

1.21 

2.83 

3.96 

5.51 

4.79 

8.08 

4.78 

2.79 

2.62

3.57

2.19 

7.64 

6.12

4.38

5.18 

2.34 

2.81 

5.09 

4.54 

4.11 

4.16 

2.91 

2.61

4.15

1.95 

3.51 

4.86

3.68

4.57 

4.43 

3.88 

3.36 

4.38 

4.87 

4.55 

3.50 

2.17

3.84

1.42 

1.90 

6.12

3.76

2.72 

5.32 

4.41 

3.45 

4.23 

3.03 

3.03 

2.99 

2.86

3.45

2.71 

3.21 

3.39

3.44

2.58 

1.68 

1.56 

2.22 

2.91 

3.01 

3.33 

3.14 

3.01

2.74

Runoff

Inches

1.60 

1.01 

4.63

52.54

1.39 

2.95 

4.57 

6.14 

5.53 

9.01 

5.52 

3.22 

2.93

48.50

2.53 

8.53 

7.06

59.38

5.97

3.24 

5.69 

5.23 

4.58 

4.80 

3.36 

2.91

56.33

2.25 

3.91 

5.60

49.97

5.27 

4.61 

4.47 

3.75 

5.05 

5.44 

5.25 

4.04 

2.42

52.06

1.64 

2.12 

7.05

51.11

3.14 

5.74 

5.08 

3.84 

4.87 

3.38 

3.49 

3.45 

3.19

46.99

3.13 

3.58 

3.91

46.80

2.97 

1.75 

1.80 

2.48 

3.35 

3.36 

3.84 

3.61 

3.36

37.14

Acre-feet

14, 470 

9,120 

42,020

476.500

12, 620 

26,730 

41,430 

55,670 

50,140 

81,730 

50,010 

29,160 

26,570

439,670

22,960 

77,300 

63,980

538,300

54, 130 

22, 040 

29,340 

51,550 

47,440 

41,510 

43,520 

30,440 

26,350

510,600

20,420 

35,470 

50,790

453,000

47, 800 

41. 840 

40,520 

33,980 

45,770 

49,280 

47,590 

36,590 

21,980

472,000

14,910 

19,190 

63,950

463,400

28, 450 

52,060 

46,050 

34,840 

44,190 

30,620 

31,660 

31,270 

28,900

426, 100

28,370 

32, 420 

35, 490

424,300

26,970 

15,830 

16,340 

22,460 

30, 360 

30,460 

34,780 

32, 760 

30, 430

336,700
35 PUYALLUP RIVER BASIN 

Puyallup River at Puyallup, Wash.

Location.- Water-stage recorder, lat. 47°12'20", long. 122°19'30B , in NEi sec. 20, T. 20

N-, R. 4 E., 1 mile northwest of Puyallup and 7 miles upstream from mouth. Datum of

gage is at mean sea level, datum of 1929.

Drainage area.- 948 square miles.

Records available.- May 1914 to September 1941.

Average discharge.- 27 years, 3,214 second-feet (adjusted for storage since October 1934).

Extremes.- Maximum discharge during year, 18,400 second-feet Nov. 29 (gage height, 18.80 

feet); minimum, 945 second-feet (regulated) tor. 16.

1914-41: Maximum discharge, 57,000 second-feet Dec. 10, 1933 (gage height, 31.0 

feet, present datum); minimum, probably less than 350 second-feet (regulated) Nov. 24, 

28, Dec. 1, 3-5, 1929.

Remarks.- Records good. All diverted water returned to river above gage. Large part of 

now of White River diverted into Lake Tapps above station. Records of daily discharge not adjusted for change in contents of Lake Tapps. Lake Tapps, lat. 470 14'20n , 

long. 122°11'30", In sec. 8, T. 20 N., R. 5 E., completed in 1912; usable contents 

between elevations 505 and 541 feet, 50,400 acre-feet. Some pondage on upper Puyallup 

River and some tributaries .

Cooperation.- Records of change of contents In Lake Tapps furnished by Puget Sound Power 

& Light Co.

Revision.- corrected figures for change in contents in Lake Tapps and monthly discharge 

adjusted for change In reservoir contents for the water year 1940, superseding those 

published in Water-Supply Paper 902, are given herein.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

S

4

6

6

7

8

9

10

11

12

13

14

16

16

17

18

19

20

21

88

83

24

26

26

27

28

29

SO

31

Oct.

1,400

1,330

1,240

1,240

1,120

1,090

1,090

1,090

1,120

1,560

2,240

1,580

1,440

1,610

1,540

1,430

1,510

1,740

1,720

1,920

2,000

1,580

1,470

2,060

2,240

l.SOO

1,360

1,500

1,680

2,000

2,560

Nov.

2,160

1,920

1,640

1,720

1,680

1,620

1,660

1,830

1,830

1,540

1,500

1,720

1,440

1,300

1,400

1,270

1,240

1,470

1,330

1,340

1,210

1,210

1,150

1,300

1,540

1,500

1,830

2,900

14,500

7,760

-

Dec.

4,360

2,990

2,800

2,680

2,770

2,990

2,770

3,100

3,220

2,770

2,460

2,260

2,140

2,040

2,510

1,900

1,950

2,000

2,140

2,830

2,670

1,660

2,420

2,290

2,060

2,260

2,520

2,440

2,220

2,410

2,350

Jan.

1,800

2,020

2,170

1,990

1,730

2,340

2,360

2,400

2,300

2,220

1,520

1,770

2,070

2,190

2,300

2,230

3,150

4,520

3,740

3,600

2,620

2,420

2,270

2,220

1,930

1,780

2,080

2,040

2,040

2,120

2,090

Feb.

1,910

1,550

1,940

1,880

1,860

1,890

1,930

1,760

1,400

1,960

2,000

1,870

1,830

1,770

1,620

al,350

al,700

al,730

al,760

al,SOO

1,300

1,480

1,350

1,930

1,970

1,930

2,080

2,320

_

_

-

Mar.

2,230

1,910

2,150

2,120

2,100

1,940

1,860

1,650

1,280

1,520

1,450

1,470

1,490

1,340

1,200

1,100

1,530

1,580

1,640

1,550

1,530

1,310

1,280

1,510

1,470

1,420

1,340

1,390

1,350

1,570

1,320

Apr.

2,390

3,520

2,880

2,580

2,390

2,020

2,440

2,480

2,250

2,210

2,150

1,970

1,710

2,000

1,960

1,810

1,710

1,780

1,680

1,370

1,610

1,660

1,640

1,680

1,630

1,590

1,370

1,540

1,620

1,690

-

Bay

1,780

1,760

1,600

1,520

2,220

2,200

2,110

2,210

2,000

1,680

1,680

2,640

2,700

2,640

2,590

2,830

3,480

2,950

3,160

2,990

2,820

2,740

2,800

2,820

2,730

3,160

3,680

4,190

3,360

1,830

2,530

June

2,450

3,070

2,920

2,760

2,860

E.960

2,880

2,520

3,020

3,010

3,120

3,260

3,520

2,940

2,640

2,710

2,580

2,980

3,150

3,310

2,530

2,110

2,510

2,510

2,290

2,010

2,030

1,300

1,620

1,970

-

July

2,100

2,190

2,210

1,650

2,070

2,300

2,460

2,200

2,120

2,110

2,220

1,910

1,710

2,470

2,430

3,340

3,490

3,420

3,100

2,630

8,540

2,280

1,900

1,640

1,640

1,470

1,860

1,830

1,840

1,820

1,820

Aug.

1,700

1,320

1,310

1,660

1,530

1,510

1,690

1,870

1,700

1,650

2,030

1,870

1,820

1,810

1,980

1,800

1,710

2,140

2,010

1,930

2,000

2,020

1,820

1,430

1,300

1,940

1,870

1,700

1,600

1,370

1,420

Sapt.

1,140

1,460

1,730

3,460

2,830

2,290

1,540

1,460

1,460

2,300

2,300

2,040

1,580

1,480

2,250

2,180

2,320

2,120

2,120

1,840

1,520

1,720

1,600

1,510

1,410

1,440

1,500

1,250

1,340

1,410

-

a Ho gage-height record; discharge computed by study of weather records and general information.
PUYALLUP RIVER BASIN 37

Monthly discharge, In seoond-feet, of Puyallup Hiver at Puyallup, Wash., 1939-41

Month

oototwr 1939 .....

Calendar year 1939 

January 1940. .....

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

Water year 1939-40

Calendar year 1940

MT...... ..........

Water year 1940-41

Observed

Discharge In 

seoond-feet

Maximum

2,180 

2,910 

8,600

.0,800

5,880 

10,500 

7,770 

4,280 

7,380 

3,060 

2,500 

1,980 

2,110

10,500

2,560 

14,500 

4,360

14,500

4,520 

2,320 

2,280 

3,520 

4,190 

3,520 

3,490 

2,140 

3,460

14,500

Minimum

986 

1,000 

1,920

986

2,210 

2,020 

2,640 

1,900 

2,460 

1,900 

1,560 

1,380 

1,170

986

1,090 

1,150 

1,660

1,090

1,520 

1,350 

1,100 

1,370 

1,520 

1,620 

1,470 

1,310 

1,140

1,090

Mean

1,423 

1,727 

3,392

2,900

3,135 

4,486 

3,964 

3,098 

3,618 

2,447 

2,097 

1,706 

1,561

2,717

1,591 

2,217 

2,515

2,697

2,324 

1,801 

1,585 

1,977 

2,575 

2,666 

2,218 

1,737 

1,818

2,087

Runoff 

In 

acre-feet

87,520 

102,700 

208,600

2,099,000

192,800 

258,000 

243,700 

184,300 

222,500 

145,600 

128,900 

104,900 

92,870

1,972,000

97,800 

131,900 

154,700

1,958,000

142,900 

100,000 

97,490 

117,700 

158,400 

158,600 

136,400 

106,800 

108,200

1,511,000

Change In 

contents 

In 

Lake 

Tapps 

(acre-feet)

-9,800 

-3,100 

+22,110

-350

-4,530 

+4,790 

-40 

-2,460 

+1,930 

+1,850 

-2,900 

+460 

-840

+7,470

-1,540 

-2,180 

+4,600

-860

-1,450 

-15,520 

+790 

+10,000 

+5,170 

+2,220 

-790 

-1,470 

+2,350

+2,180

Adjusted for change In 

reservoir contents

Runoff 

In 

acre feet

77,720 

99,600 

230,700

2,099,000

188,300 

262,800 

243,700 

181,800 

224,400 

147,400 

126,000 

105,400 

92,030

1,980,000

96,260 

129,700 

159,300

1,957,000

141,400 

84,480 

98,280 

127,700 

163,600 

160,800 

135,600 

105,300 

110,600

1,513,000

Discharge In 

second-feet

Mean

1,264 

1,674 

3,752

2,899

3,062 

4,569 

3,963 

3,055 

3,650 

2,477 

2,049 

1,714 

1,547

.2,727

1,566 

2,180 

2,591

2,696

2,300 

1,521 

1,598 

2,146 

2,661 

2,702 

2,205 

1,713 

1,859

2,090

Per 

square 

mile

1.33

1.77 

3.96

3.06

3.23

4.82 

4.18 

3.22 

3.85 

2.61 

2.16 

1.81 

1.63

2.88

1.65 

2.30 

2.73

2.84

2.43 

1.60 

1.69 

2.26 

2.81 

2.85 

2.33 

1.81 

1.96

2.20

Off

In 

Inches

1.53 

1.98 

_ 4 'J§6_

41.50

3.72 

5. SO 

4.82 

3.59 

4.44 

2.91 

2.49 

2.09 

1.82

39.15

1.90 

2.57 

3.15

38.70

2. SO 

1.67 

1.95 

2.52 

3.24 

3.18 

2.69 

2.09 

2.19

29.95
38 PUYALLUP RIVER BASIN 

Carbon River near Fairfax, Wash.

Location.- Water-stage recorder, lat. 47°01'30B , long. 122°02'00", in SWi sec. 22, T. 18 

N., R. 6 E., li miles northwest of Fairfax and 12 miles upstream from Voights Creek.

Drainage area.- 81 square miles. "

Records available.- March 1929 to September 1941. November 1910 to July 1912, at site 

It miles upstream, published as Carbon River at Fairfax, Wash.

Average discharge.- 12 years (1929-41), 398 second-feet.

Extremes.- Maximum discharge during year, 4,040 second-feet Nov. 29 (gage height, 5.80 

reetj; minimum, 100 second-feet Oct. 8, Feb. 22, 23; minimum gage height, 1.15 feet 

Oct. 8.

1910-12, 1929-41: Maximum discharge, 8,030 second-feet Dec. 9, 1933 (gage height, 

10.2 feet), from rating curve extended above 500 second-feet; minimum, 40 second-feet 

(estimated) Jan. 20, 1930 (stage-discharge relation affected by ice).

Remarks.- Records good. Some water diverted for use by lumber industry but returned to 

river above gage.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

150

130

127

132

127

114

106

104

110

304

562

313

284

253

208

179

179

230

357

477

432

246

199

395

374

256

20S

1S4

1S4

2SS

349

Nov.

306

277

240

208

190

179

202

205

199

173

165

152

145

147

150

155

170

179

162

157

155

145

142

250

263

230

675

1,530

2,600

1,110

-

Dec.

782

V3S

752

619

62fi

55fi

472

499

462

387

32&

284

256

233

214

202

193

190

193

390

29S

273

243

221

205

202

224

205

221

214

199

Jan.

1S2

173

168

165

168

168

162

155

157

165

168

173

182

187

176

170

513

846

562

405

333

291

260

243

246

250

211

205

193

190

193

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

208

193

179

173

168

166

164

152

152

160

150

145

137

130

125

US

114

112

112

110

108

102

100

112

108

104

142

202

_

-

-

Secondfoot-days

7,561

10,861

10,878

193-Rfi9 '

7 RRfl

3)946

4 419

7,216

10,728

10,074

10 304

7 ) 273

9,688

100, 608

Mar.

221

224

190

168

150

142

137

137

132

127

125

123

125

120

116

112

116

140

125

120

112

135

145

130

120

123

127

135

150

202

190

Maximum

562

2,600

782

2,600

846

208

224

467

593

442

544

336

895

2,600

Apr.

372

467

349

284

270

273

260

266

260

250

230

208

196

199

246

214

196

187

179

182

187

193

205

205

205

221

227

218

224

243

-

May

295

291

296

266

277

240

227

237

221

227

306

593

462

447

357

396

538

438

349

313

310

349

400

423

419

387

357

325

302

273

405

Minimum

104

142

190

104

155

100

112

221

230

214

132

176

100

June

409

362

333

321

321

366

428

405

391

383

405

438

442

362

321

287

266

325

370

378

317

298

295

302

287

266

266

263

237

230

-

Mean

244

362

351

338

247

141

241

346

336

332

235

323

276

July

250

295

345

341

357

357

345

329

310

298

277

277

306

370

457

538

544

499

428

357

405

313

233

240

214

280

270

273

270

263

263

Per 

square 

mile

3.01

4.47

4.33

4.17

3.05

1.74

1.77

2. 98

4!l5

4.10

g.90

3*99

3.41

Aug.

211

184

173

179

176

233

260

287

310

306

298

284

237

263

270

230

253

287

287

291

291

260

336

202

208

218

168

147

132

145

147

Sept.

176

184

492

895

709

419

284

243

256

459

329

253

277

399

560

405

400

349

306

280

237

211

196

184

179

202

202

182

176

244

~

Runoff

Inches

3.47

4.99

4.99

56.88

52

1.81

3)31

4.93

4.63

4.73

3.34

4.45

46.20

Acre feet

15,000

21,540

21,580

24S t-**«j f VOO

15,190

7 jS30

14)310

21,280

19 980

20)440

14,430

19,220

199,600
PUYALLUP RIVER BASIN 39

White River at Greenwater, Wash.

Location.- Water-stage recorder, lat. 47°08'5011 , long. 121 038'50'1 ' in SEi sec. 10, T. 19 

N., R. 9 E., three-quarters of a mile southeast of Greenwater, three-quarters of a 

mile upstream from Greenwater River, and 25 miles upstream from Buckley.

Drainage area.- 216 square miles.

Records avallable.- March 1929 to September 1941. September 1911 to May 1912 (fragmentary), at site 2 miles upstream, published as White River near Enumclaw, Wash.

Average discharge.- 12 years, 792 second-feet.

Extremes.- Maximum discharge during year, 2,690 second-feet Nov. 29 (gage height, 4.80 

feet;; minimum, 232 second-feet Nov. 22 (gage height, 1.99 feet).

1911-12, 1929-41: Maximum discharge, 12,100 second-feet Dec. 21, 1933 (gage 

height, 9.38 feet); minimum, 120 second-feet Nov. 2, 1935 (gage height, 1.69 feet).

Remarks.- Records good. No diversion or regulation.

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

341

304

308

295

283

279

279

275

272

501

562

399

399

336

326

299

433

605

776

896

664

427

414

904

556

433

356

331

326

405

433

Nov.

377

356

317

304

295

287

356

346

317

291

295

275

272

27S

272

279

287

283

268

268

264

247

250

317

308

291

476

1,010

2,140

1,270

-

Dec.

952

856

856

760

880

864

752

792

736

650

591

535

495

470

439

410

405

422

445

936

736

744

657

620

591

542

521

495

488

476

445

Jan.

405

394

388

377

372

361

346

336

331

331

326

331

351

351

336

331

610

1,030

808

657

583

521

482

463

488

463

427

410

399

399

451

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 .......

Feb.

583

488

457

439

422

416

416

394

388

377

367

356

346

346

331

326

322

317

313

308

308

304

304

313

299

291

291

470

_

_

-

Secondfoot days

13,417

12,590

19,561

252,239

13,858

10,292

12,325

16,990

25,842

26,702

24,570

19,060

12,790

207,997

Mar.

555

542

476

457

427

410

399

399

383

377

377

372

361

356

351

351

361

388

372

351

341

356

361

346

346

356

367

394

410

482

501

Maximum

904

2,140

952

2,140

1,030

583

555

808

1,140

1,270

1,090

784

728

2,140

Apr.

665

76O

672

612

591

549

535

528

542

535

528

501

488

495

528

501

463

451

439

451

463

501

549

569

605

634

650

665

712

808

-

Hay

848

824

768

696

672

591

562

555

508

528

712

1,140

1,090

936

832

912

1,130

952

824

760

760

832

960

1,140

1,140

1,050

928

840

784

728

840

Minimum

272

247

405

247

326

291

341

439

508

712

612

427

308

S47

June

872

896

896

920

928

960

960

896

880

968

1,120

1,270

1,270

1,090

960

880

848

888

848

792

736

816

840

776

712

720

752

752

728

728

-

Mean

433

420

631

689

447

368

398

566

834

890

793

615

426

570

July

800

824

856

840

832

904

888

776

760

728

720

728

784

872

944

1,040

1,090

1,040

968

840

792

720

634

634

627

665

672

680

650

650

612

Per 

square 

mile

2.00

1.94

2.92

3.19

2.07

1.70

1.84

2.62

3.86

4.12

3.67

2.85

1.97

2.64

Aug.

549

195

514

528

542

576

342

596

752

768

720

768

634

B65

696

657

BBS

736

784

736

728

380

372

521

562

555

170

145

*27

127

427

Sept.

488

521

565

680

591

488

433

427

427

728

476

416

394

405

445

405

399

377

372

356

331

326

341

346

351

372

317

308

322

383

-

Runoff

Inches

2.31

2.17

3.37

43.42

2.39

1.77

2.12

2.93

4.45

4.60

4.23

3.28

2.20

35.82

Ac re- feet

26,610

24,970

38,800

500,300

27,490

20,410

24,450

33,700

51,260

52,960

48,730

37,800

25,370

412,600
40 PUYALLUP RIVER BASIN

White River near Buckley, Wash.

Location.- Water-stage recorder, lat. 47°09'05", long. 121°57'00", In SWiNWi sec. 8, T. 

19 N., R. 7 E., 3 miles east of Buckley and 8 miles downstream from Clear-water River. 

Datum of gage Is at mean sea level, datum of 1929.

Drainage area.- 403 square miles.

Records available.- October 1938 to September 1941. October 1928 to November 1933 at 

site 3 miles upstream.

Extremes.- Maximum discharge during year, 7,600 second-feet Nov. 29 (elevation, 805.67 

feet); minimum, 374 second-feet Oct. 6, 7 (elevation, 798.96 feet).

1928-33, 1938-41: Maximum discharge, 17,000 second-feet Feb. 26, 1932 (gage height, 

17.5 feet, site and datum then in use), from rating curve extended above 4,000 secondfeet; minimum, 213 second-feet Nov. 21, 1929 (gage height, 1.78 feet, site and datum 

then In use), but may have been less some time during Jan. 15-30, 1930, when stagedischarge relation was affected by Ice.

Remarks.- Records good. No diversions, 

tions at Mud Mountain Dam.

Some slight regulation from construction operaCooperation.- Water-stage recorder Inspected by employees of Corps of Engineers, U. S. 

Army.

Rating tables, water year 1940-41 (elevation, in feet, and discharge, in second-feet) 

(Shifting-control method used Nov. 30 to Dec. 12, Jan. 16 to Feb. 18, Mar. 26 to Apr. 15)

Oct. 1 to Hov. 29 Hov. 30 to Sept. 30

799.0 385 300.5 1,120 S02.5 2,360 300.3 480 802.0 

799.2 450 S01.0 1,460 803.0 3,380 800.5 565 802.5 

799.5 570 801.5 1,880 804.0 4,810 301.0 340 803.0 

80O.O S26 802.0 2,360 805.0 6,400 801.5 1,240 803.5

Discharge, in second- feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

476 

416 

443 

423 

413

394 

394 

394 

391 

606

912 

611 

616 

523 

491

461 

557 

744 

912 

1,060

1,000 

607 

523 

1,360 

941

717 

598 

540 

553 

771 

1,000

Nov.

883 

793 

691 

616 

579

536 

616 

665 

616 

544

523 

480 

461 

457 

f465

f503 

544 

548 

495 

4S7

476 

440 

443 

579 

640

593 

1,010 

2,400 

6,270 

3,430

Dec.

2,500 

2,130 

2,070 

1,330 

2,OlO

1,950 

1,720 

1,330 

1,720 

1,440

1,290 

1,150 

1,020 

945 

910

840 

SOS 

808 

80S 

1,440

1,240 

1,200 

1,060 

1,020 

930

910 

945 

S75 

910 

910 

375

Jan.

SOS 

745 

745 

715 

715

715 

688 

a660 

660 

660

660 

660 

683 

715 

688

660 

1,300 

2,310 

1,330 

1,440

1,240 

1,100 

9SO 

910 

945

945 

375 

808 

775 

775 

SOS

Feb.

1,020 

910 

340 

SOS 

775

775 

775 

715 

715 

715

688 

660 

635 

610 

583

565 

542 

534 

520 

516

508 

500 

500 

538 

529

508 

610 

SOS

Month Secondfoot-days

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Haro 

Apri 

May 

June 

July 

Augu 

Sept

Ha

lendar year 194C 

ary . 2

.......................... 3

.......................... 2

st ........................ 2

ember ..................... 2

9,847 

7,783 

0,144

3,642

8,223 

3,407 

0,086 

3,570 

3,430 

7,570 

9,514 

2,269 

0,674

ter year 1940-41 .......... 331,522

Mar.

875 

875 

808 

745 

715

68S 

66O 

688 

660 

635

610 

588 

565 

560 

556

552 

556 

610 

610 

588

552 

588 

610 

588 

565

565 

583 

610 

660 

808 

808

Maximum

1,360 

6,270 

2,500

6,270

2,310 

1,020 

875 

1,340 

1,720 

1,720 

1,290 

S40 

930

6,270

Apr.

1,060 

1,340 

1,150 

1,060 

1,020

9SO 

910 

910 

945 

910

945 

910 

375 

S75 

875

945 

910 

875 

840 

840

340 

875 

S75 

910 

910

945 

930 

980 

980

1,100

May

1,200 

1,150 

1,200 

1,060 

1,100

9SO 

910 

945 

375 

S40

980 

1,550 

1,550 

1,340 

1,200

1,340 

1,720 

1,500 

1,340 

1,240

1,20O 

1,200 

1,340 

1,500 

1,550

1,440 

1,340 

1,240 

1,150 

1,060 

1,390

June

1, 

1, 

1, 

1, 

1,

1, 

1, 

1, 

1, 

1,

1, 

1, 

1, 

1,

1,

1, 

1, 

1, 

1, 

1,

1, 

1, 

1, 

1,

Minimum Mean

391 640 

440 926 

808 1,295

391 1,130

660 910 

500 657 

552 648 

840 952 

840 1,240 

945 1,252 

745 952 

534 718 

547 689

391 908

390 

390 

340 

340 

340

390 

390 

340 

290 

340

500 

720 

660 

500 

290

200 

200 

240 

290 

200

100 

100 

150 

060 

930

945 

980 

9SO 

930 

945

July

1, 

1, 

1, 

1,

1, 

1,

1, 

1,

1, 

1, 

1, 

1, 

1,

Per 

square 

mile

1.59 

2.30 

3. PI

2.80

2.26 

1.63 

1.61 

2.36 

3.08 

3.11 

2.36 

1.78 

1.71

2.25

980 

020 

020 

020 

020

060 

100 

980 

945 

910

875 

875 

945 

020 

100

240 

290 

200 

060 

020

945 

875 

775 

775 

745

745 

808 

SOS 

SOS 

775 

775

1,770 

2,370 

3,020 

3,710

Aug.

688 

660 

635 

660 

660

688 

745 

775 

SOS 

840

808 

840 

715 

715 

745

745 

775 

840 

840 

840

840 

808 

808 

635 

660

71S 

588 

565 

542 

552 

534

Sept.

588 

635 

715 

980 

980

775 

635 

588 

588 

945

745 

660 

655 

68S 

840

745 

808 

745 

715 

688

635 

588 

588 

565 

565

688 

588 

547 

552 

660

Runoff

Inches

1.83 

2.56 

3.70

38.14

2.60 

1.70 

1.S5 

2.64 

3.55 

3.47 

2.72 

2.06 

1.91

30.59

Acre-feet

39,370 

55,120 

79,620

320,500

55,980 

36,510 

39,840 

56,670 

76,220 

74,520 

58,540 

44,170 

41,010

657,600

Ho gage-height record; discharge computed on basis of following day 1 

Computed on basis of partly estimated gage-height recor-d.
PUYALLUP RIVER BASIN 41

Greermater River at Greenwater, Wash.

Location.- Water-stage recorder, lat. 47°09'15", long. 121°38'00", In NWiNWi sec. 11, T. 

19 N., R. 9 E., 1 mile upstream from mouth, 1 mile east of Greenwater, and 17 miles 

east of Buckley.

Drainage area.- 74 square miles.

Records available.- September 1911 to August 1912 (fragmentary), published as Greermater 

River near Enumclaw, Wash.; May 1929 to September 1941.

Average discharge.- 12 years (1929-41), 190 second-feet.

Extremes.- Maximum discharge during year, 773 second-feet Nov. 29 (gage height, 4.40 

feet); minimum, 29 second-feet Oct. 8, 9, 16-19 (gage height, 2.10 feet).

1911-12, 1929-41: Maximum discharge, 4,140 second-feet Dec. 9, 1933 (gage height, 

9.24 feet, site and datum then In use), from rating curve extended above 1,000 secondfeet; minimum, 23 second-feet Oct. 7, 1934 (gage height, 2.06 feet).

Remarks.- Records good except those for periods of shifting control, which are fair. No 

diversion or regulation.

Discharge, in second feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

33 

32 

38 

36 

35

31 

31 

30 

30 

35

39 

35 

36 

35 

31

30 

29 

29 

29 

31

34 

32 

31 

51 

58

46 

39 

35 

35 

46 

62

Nov.

58 

52 

47 

43 

41

39 

41 

48 

47 

42

41 

39 

36 

35 

35

38 

40 

42 

40 

38

37 

35 

35 

44 

48

46 

84 

225 

613 

357

Dec.

247 

202 

188 

IS 3 

183

191 

175 

180 

186 

167

155 

141 

128 

120 

113

105 

103 

100 

98 

126

118 

118 

114 

113 

109

103 

107 

105 

107 

109 

105

Jan.

100 

94 

91 

89 

88

86 

83 

80 

80 

79

79 

79 

82 

80 

79

76 

121 

180 

172 

155

146 

141 

130 122' 

120

122 

114 

109 

103 

103 

105

Month

Octo 

Nove 

Dece

Ca

Jami 

Febt 

Hare 

Apr! 

May 

June 

July 

Augu 

Sept

ffa

mber ......................

lendar year 194 

ary

3 ..... ...

ember .....................

ter year 1940-41 ..........

Feb.

110 

109 

101 

100 

98

96 

94 

89 

88 

88

86 

86 

79 

74 

74

73 

71 

70 

68 

66

66 

66 

64 

66 

67

67 

70 

74

Secondfoot days

1,124 

2,366 

4,297

46,677

3,288 

2,260 

2,404 

4,089 

4,901 

4,046 

1,926 

1,279 

1,738

33,718

Mar.

77 

89 

85 

63 

79

77 

77 

79 

79 

79

76 

74 

73 

71 

70

68 

68 

71 

71 

70

68 

70 

71 

71 

71

73 

76 

80 

83 

109 

116

Maximum

62 

613 

247

613

180 

110 

116 

155 

188 

199 

88 

48 

68

613

Apr.

126 

155 

155 

152 

148

150 

141 

137 

135 

137

139 

141 

139 

137 

143

139 

139 

137 

135 

132

130 

128 

128 

126 

126

126 

124 

126 

126 

132

May

139 

143 

150 

146 

14S

132 

126 

126 

122 

118

118 

155 

167 

167 

164

167 

177 

186 

188 

186

ISO 

177 

172 

169 

169

169 

164 

164 

164 

162 

186

Minimum

29 

35 

98

28

76 

64 

68 

124 

118 

91 

44 

35 

37

29

June

197 

199 

194 

186 

172

167 

164 

167 

162 

157

152 

148 

139 

135 

132

128 

120 

118 

120 

116

109 

105 

101 

98 

98

96 

93 

91 

91 

91

Mean

36.3 

7S.9 

139

128

106 

80.7 

77.5 

136 

158 

135 

62.1 

41.3 

57.9

92.4

July

88 

86 

85 

83 

79

77 

76 

73 

71 

68

67 

66 

64 

62 

61

58 

57 

56 

55 

54

52 

51 

50 

51 

52

51 

49 

4S 

47 

45 

44

Per 

square 

mile

0.491 

1.07 

1.88

1.73

1.43 

1,09 

1.05 

1.84 

2.14 

1.82 

.839 

.558 

.782

1.25

Aug.

44 

43 

45 

48 

44

44 

43 

42 

41

40

41 

47 

43 

41 

40

39 

38 

37 

36 

35

37 

42 

46 

43 

40

45 

41 

39 

38 

39 

38

Sept.

37 

39 

55 

66 

64

58 

52 

46 

45 

66

64 

59 

57 

55 

68

64 

66 

64 

66 

67

62 

58 

56 

54 

51

58 

62 

57 

55 

67

Runoff

Inches

0.56 

1.19 

2.16

23.46

1.65 

1.14 

1.31 

2.05 

2.46 

2.03 

.97 

.64 

.87

16.93

Acre-feet

2,230 

4,690 

8,520

92,590

6,520 

4,480 

4,770 

8,110 

9,720 

8,030 

3,820 

2,540 

3,450

66,880

Hote.- Shifting-control method used Dec. 22 to Jan. 28, Feb. 3 to May 24, Aug. 6 to Sept. 30.
DUWAMISH RIVER BASIN

Green River near Palmer, Wash.

Location.- Water-stage recorder, lat. 47°17'40", long. 121B 49'20", in SWiNWi sec. 20, T. 

iil JM., R. 8 E., ll miles upstream from diversion dam and intake of Tacoma water-supply 

system, 2i miles downstream from North Fork, and 4 miles southeast of Palmer.

Drainage area.- 231 square miles.

Records available.- October 1931 to September 1941.

Average discharge.- 10 years, 1,043 second-feet.

Extremes . - Maximum discharge during year, 8,070 second-feet Nov. 29 (gage height, 13.05 

 feet); minimum, 107 second-feet Oct. 9 (gage height, 4.27 feet).

1931-41: Maximum discharge, 33,600 second-feet Dec. 9, 1933 (gage height, 19.4

feet, computed on basis of flow over diversion dam); minimum, 81 second-feet Sept. 4,

5, 1934; minimum gage height, 4.00 feet Sept. 4, 1933.

Remarks . - Records excellent except those above 600 second-feet, which are good. No diversion or regulation.

Rating tables water year 1940-41 (gage height, In feet, 

Oct. 1 to Apr. 22

nd discharge, In second-feet) 

Apr. 23 to Sept. 30

4.3 115 5.2 504 8.0 2,120 4.3 125 5.0 410 

4.5 179 5.5 661 9.0 2,870 4.5- 190 5.4 610 

4.7 262 6.0 931 10.0 3,850 4.7 270 5.S 830 

4.9 354 7.0 1,500 12.0 6,450

Discharge, in second-feet, water year October 1940 to September 1941 

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

120 

118 

120 

126 

123

118 

112 

110 

112 

222

383 

249 

236 

202 

179

168 

164 

168 

171 

198

244 

210 

244 

354 

340

298 

258 

231 

231 

463 

671

Nov.

613 

561 

494 

428 

383

349 

383 

443 

438 

393

359 

326

298 

280 

276

271 

276 

294 

276 

271

258 

240 

231 

276 

349

349 

645 

2,350 

6,740 

3,050

Dec.

2,120 

1,680 

1,680 

1,560 

1,620

1,620 

1,470 

1,560 

1,500 

1,300

1,130 

986 

876 

795 

714

655 

613 

587 

655 

1,180

958 

876 

795 

741 

714

682 

714 

714 

822 

849 

795

Jan.

708 

661 

61S 

597 

571

535 

504 

479 

474 

458

44S 

438 

443 

458 

474

453

977 

1,740 

1,500 

1,240

1,040 

931 

822 

768 

822

876 

795 

741 

698 

6SS 

741

Feb.

S49 

S22 

76S 

714 

671

639 

629 

587 

571 

571

551 

535 

499 

479 

458

438 

418 

408 

393 

388

373 

368 

364 

373 

378

364 

448 

587

fSays

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

mber ......................

lendar year 1940 

ary

6,943 

21,900 

32,961

......... 262,266

3_

ember .....................

22,692 

14,643 

16,111 

18,904 

16,423 

13,728 

6,416 

4,478 

11,174

ter year 1940-41 .......... 186,373

Mar.

592 

6S7 

676 

634 

597

566 

546 

556 

561 

546

520 

499 

458 

438 

428

413 

418 

510 

494 

463

438 

474 

469 

443 

433

438 

463 

494 

535 

661 

661

Maximum

671 

6,740 

2,120

6,740

1,740 

849 

687 

876 

830 

616 

297 

176 

621

6,740

Apr.

703 

S76 

795 

741 

741

768 

692 

661 

661 

645

629 

592

561 

540 

602

661 

703 

703 

682 

661

634 

613 

590 

560 

530

510 

495 

470 

445 

440

May

440 

430 

465 

445 

510

470 

435 

445 

425 

400

395 

485 

450 

435 

435

555 

830 

830 

802 

748

698 

638 

585 

540 

500

490 

510 

485 

465 

450 

632

Minimum

110 

231 

587

100

438 

364 

413 

440 

395 

310 

155 

122 

149

110

June

616 

585 

555 

520 

495

495 

575 

580 

570 

540

500 

480 

450 

430 

410

395 

400 

440 

495 

515

455 

420 

395 

380 

385

356 

333 

324 

324 

310

Mean

224

730 

1,063

717

732 

523 

520 

630 

530 

458 

207 

144 

372

511

July

297 

284 

274 

266 

258

250 

246 

23S 

230 

222

218 

210 

210 

202

198

190 

190 

186 

186 

183

180 

176 

176 

176 

180

172 

169 

166 

166 

162 

155

Per 

square 

mile

0.970 

3.16 

4.60

3.10

3.17 

2.26 

2.25 

2.73 

2.29 

1.98 

.896 

.623 

1.61

2.21

Aug.

155 

155 

162 

166 

162

152 

143

140 

140 

137

137 

143 

143 

137 

137

134 

131 

128 

125 

125

122 

128 

146

146 

146

176 

162 

162 

149 

143 

146

Sept.

149 

152 

254 

356 

351

302 

250 

222 

210 

351

333 

315 

342 

500 

610

600 

621 

580 

520 

515

460 

410 

380 

346 

324

328 

342 

310 

306 

435

Runoff

Inches

1.12 

3.53 

5.31

42.22

3.65 

2.36 

2.59 

3.04 

2.64 

2.21 

1.03 

.72 

1.80

30.00

Ac re- feet

13,770 

43,440 

65,380

520,200

45,010 

29,040 

31,960 

37,500 

32,570 

27,230 

12,730 

8,880 

22,160

369,700
DUWAMISH RIVER BASIN 

Green River near Black Diamond, Wash.

43

Location.- Staff gage, lat. 47°17'00", long. 122°03'30n , in NWi sec. 28, T. 21 N., R.

 6 U., at highway bridge, three-quarters of a mile upstream from Newaukum Creek and 3 

miles southwest of Black Diamond. Datum of gage Is 158.5 feet above mean sea level 

(river-profile survey).

Drainage area.- 286 square miles.

Records available.- October 1939 to September 1941.

Extremes. Maximum discharge during year, 8,680 second-feet Nov. 29 (gage height, 6.55 

 Trom graph based on gage readings); minimum observed, 68 second-feet Oct. 9 

.. height, 1.45 feet).

1939-41: Maximum discharge, that of Nov. 29, 1940; minimum observed, 56 secondfeet Sept. 25, 26, 1940 (gage height, 1.39 feet).

Remarks.- Records good. Gage read twice daily. City of Tacoma diverts about 85 second-

 feet for municipal use. No regulation.

Rating table, water year 1940-41 (gage helgit, in feet, and discharge, in second-feet)

1.5 

1.7 

1.9 

2.1

82

150

238

340

2.4 

2.7 

3.0 

3.5

530

760

1,050

1,660

4.0. 

4.5 

5.0 

6.0

2,400

3,250

4,230

6,820

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

82

82

82

88

88

82

76

70

70

106

376

238

200

174

178

182

122

126

134

142

182

200

182

258

319

277

209

209

200

282

602

Nov.

602

530

462

400

364

329

324

431

431

388

352

324

292

272

258

258

258

277

262

258

253

238

228

219

298

340

431

1,100

6,240

3,430

-

Dec.

2,090

1,660

1,600

1,530

1,530

1,600

1,460

1,530

1,530

1,280

1,100

994

848

760

719

640

602

602

602

1,050

943

848

760

719

678

678

719

719

804

848

760

Jan.

719

678

640

602

566

566

530

496

496

462

462

462

462

462

496

462

760

1,660

1,460

1,220

1,050

896

804

760

760

848

760

719

678

678

678

Feb.

84S

760

719

719

678

640

640

602

566

602

566

530

530

496

462

462

431

431

400

400

388

376

364

370

394

370

431

566

_

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

566

640

640

602

602

566

530

530

530

530

496

496

462

431

400

400

394

462

496

462

431

431

462

431

400

400

431

462

462

602

602

Apr.

640

S04

760

678

678

719

640

602

602

602

602

566

530

566

602

640

678

678

640

640

602

602

566

530

530

496

462

462

431

431

-

Secondfoot-days

5,618

19,849

32,203

276,139

22,292

14,741

15,349

17,979

15,744

13,499

6,160

3,670

9,984

177,088

May

431

431

462

431

496

462

431

431

400

388

364

462

431

400

400

462

760

S04

760

719

678

602

566

530

496

530

496

462

462

431

566

Maximum

602

6,240

2,090

6,240

1,660

848

640

804

804

602

303

158

566

6,240

June

602

566

530

496

462

462

530

566

530

602

496

462

431

431

400

382

388

431

496

530

462

431

400

376

376

364

340

319

319

319

-

Minimum

7

21

60

5

46

36

39

43

36

31

13

9

11

7

July

303

287

277

267

258

253

238

233

228

228

209

209

204

200

190

182

182

182

174

166

166

166

158

158

166

158

150

146

142

142

138

Aug.

134

130

134

142

134

126

118

118

118

112

allO

a!15

118

112

109

106

106

103

97

94

94

100

106

112

118

142

142

158

126

118

118

Mean

3 181

9 662

2 1,039

5 754

2 719

1 526

1 495

L 599

I 508

3 450

3 199

1 118

3 333

D 485

Sept.

118

126

150

329

303

287

262

219

174

2S7

329

287

303

400

566

496

530

496

496

496

431

394

358

329

303

298

324

303

287

298

-

Runoff in 

acre-feet

11,140

39,370

63,870

547,700

44,220

29,240

30,440

35,660

31,230

26,770

12,220

7,280

19,800

351,200

a No gage-height record; discharge computed on basis of records for station near Aubur

461678 O-42-4
44 DUWAMISH RIVER BASIN 

Green River near Auburn, Wash.

Location.- Water-stage recorder, lat. 47°18'15", long. 122°02'10", In lot 3, sec. 17, 

T. 21, N., R. 5 E., li miles east of Auburn and 2 miles downstream from Big Soos 

Creek. Datum of gage Is at mean sea level, datum of 1929.

Drainage area.- 386 square miles.

Records available.- August 1936 to September 1941.

Extremes.- Maximum discharge during year, 7,290 second-feet Nov. 29 (elevation, 61.60 

feet); minimum, 140 second-feet Aug. 22, 23 (elevation, 54.61 feet).

1936-41: Maximum discharge, 14,400 second-feet Apr. 18, 1938 (elevation, 65.88 

feet); minimum, 113 second-feet Sept. 25, 1940; minimum elevation, that of Aug. 22, 

23, 1941.

Remarks.- Records excellent. City of Tacoma diverts about 85 second-feet from river near 

Palmer, several miles above station, for municipal supply. No regulation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second -feet) 

(Shifting-control method used Oct. 1-10, Mar. 24 to Apr. 17)

Oct. 1 to Apr. 17 Apr. 18 to Sept. 30

54.6 116 56.0 1,150

54. S 205 57.0 2,130

55.0 319 58.0 3,130

55.3 532 59.0 4,230

55.6 783 61.0 6,560

54

55

55

55

56

8 240

0 364

3 579

6 821

0 1,170

Discharge, in seoond-feet. water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

171

157

162

162

167

157

149

145

153

186

435

378

313

277

271

277

200

195

210

232

265

295

289

442

517

442

372

326

313

399

774

Nov.

SOI

766

671

596

524

479

471

604

6S8

612

564

509

464

428

406

392

399

435

413

413

435

392

365

399

449

494

572

1,270

5,920

3,790

-

Dec.

2,530

2,030

1,930

1,330

1,830

1,980

1,830

1,830

1,930

1,680

1,480

1,340

1,200

1,070

982

899

336

828

854

1,440

1,390

1,200

1,110

1,050

1,020

1,010

1,100

1,090

1,130

1,110

1,150

Jan. j Feb.

 -1 

1,050 1,150

932

927

381

363

908

345

783

740

713

688

671

671

713

757

722

1,070

2,030

1,980

1,680

1,440

1,290

1,150

1,070

1,100

1,200

1,100

1,040

972

936

963

1>070

1,030

963

913

SS1

872

319

811

836

801

774

722

688

662

637

612

58S

564

548

532

517

509

524

548

517

588

801

_

.

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

Bay............ . .................. ......

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

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

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

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

Water year 1940-41 ......................

Mar.

872

945

927

372

319

774

740

731

740

722

696

662

620

588

564

548

540

637

671

620

580

596

604

580

556

556

564

588

620

774

810

Apr.

1

1

899

,130

,060

982

954

1,030

Second 

foot-days

8,331

24,721

42,689

347,823

31,935

20,482

21,116

24,824

20,941

18,200

8,985

5,653

13,101

241,478

954

899

372

863

828

301

748

722

783

872

927

906

880

846

804

771

738

714

689

657

649

641

610

595

-

Bay

579

57

5S

5S

9

5

5

657

641

5E

5E

57

7

5

2

549

519

5E

5E5r

7

5

2

564

657

9£

1,04

96

8

0

6

915

872

8C

7!

6E

4

8

)9

649

618

6^

6E

K

5E

11

>7

6

)7

738

Maximum

774

5,920

2,530

5,920

2,030

1,150

945

1,130

1,040

838

412

229

722

5,920

June

338

771

722

665

634

626

689

738

706

738

657

602

579

556

542

512

519

572

706

730

649

587

556

519

512

497

468

446

432

432

-

Minimum

145

365

328

113

671

509

540

595

519

432

202

145

190

145

July

412

391

384

371

364

358

361

345

332

319

313

306

294

288

282

270

264

270

264

258

252

246

240

240

240

240

229

224

218

218

202

Aug.

Mean

285

824

1,377

950

1,030

732

681

827

676

607

290

182

437

662

196

196

218

229

212

196

190

180

170

166

166

ISO

1S5

170

165

165

165

155

155

150

150

145

155

175

185

212

218

229

212

185

180

Sept.

190

207

234

384

405

398

338

276

246

332

446

398

378

482

649

665

722

714

665

626

579

526

475

432

398

391

412

398

371

364

~

Runoff in 

acre- feet

17,520

49,030

84,670

689,800

63,340

40, 630

41, 880

49,240

41,540

36,100

17,820

11,210

25,990

479,000
LAKE WASHINGTON BASIN 45

Cedar River at Cedar Falls, Wash.

Location.- Water-stage recorder, lat. 47°25'10", long. 121°47'20", in sec. 4, T. 22 N., 

R. 8 U., three-quarters of a mile downstream from Seattle municipal power plant at 

Cedar Falls and 3 miles downstream from Cedar Lake.

Drainage area.- 86 square miles.

Records available.- April 1914 to September 1941.

Average discharge.- 27 years, 286 second-feet.

Extremes (regulated).- Maximum discharge during year, 742 second-feet Nov. 28 (gage

height, 6.75 reet); minimum, 31 second-feet Nov. 19 (gage height, 4.93 feet); minimum 

dally, 52 second-feet July 12.

1914-41: Maximum discharge, 6,290 second-feet Dec. 19, 1917; maximum gage height, 

11.5 feet Dec. 22, 1933; no flow Nov. 25, 1917, Aug. 18, 1923; minimum dally, 2 secondfeet Sept. 20, 1922.

Remarks.- Records excellent. All diverted water returned to river above station, 

partly regulated by Cedar Lake Reservoir for power.

Cooperation.- Gage-height record collected in cooperation with city of Seattle.

Flow

Rating table, water year 1940-41 (gage height, In feet, and discharge, 

In second-feet)

5.0 40 5.6 156 6.3 455 

5.2 71 5.8 22O 

5.4 108 6.O 305

Discharge, in second-feet, water year October 194O to September 1941

Da;

1 

2 

3 

4

5

6 

7 

8 

9

10

11 

12 

13 

14 

15

18 

17 

18 

19 

20

21 

22 

23 

24

25

26 

27. 

28 

29 

30 

31

Oct.

58 

73 

68 

60 

54

54 

54 

54 

68 

59

 62 

59 

69 

58 

61

59 

59 

68 

58 

61

61 

59 

59 

67 

67

67 

66 

64 

78 

69 

72

Nov.

69 

67 

68 

64 

62

62 

64 

64 

64 

62

61 

59 

140 

70 

86

58 

58 

84 

82 

111

69 

92 

69 

58 

120

120 

196 

115 

142 

299

Dec.

287 

276 

254 

315 

298

338

295 

282 

306 

109

94 

89 

78 

67 

66

81 

84 

73 

81 

95

78 

78 

76 

76 

74

76 

79 

78 

83 

85 

83

Jan.

81 

79 

78 

76 

76

76 

76 

190 

231 

226

245 

294 

234 

219 

208

206 

229 

98 

196 

98

85 

83

SI 

37 

83

122 

81 

79 

87 

79 

79

Feb.

81 

81 

94 

78 

78

91 

95 

78 

76 

76

96 

115 

97 

98 

124

77 

135 

110 

110 

100

97 

104 

175 

198 

197

207 

182 

198

u<%n+h SecondMonth foot-days

Octo 

Hove 

Dece

Ca

Janu 

Febr 

Marc 

Apr! 

May 

June 

July 

Augu 

Sept

Wa

mber ......................

lendar year 1940 

ary

1,925 

2,735 

4,434

......... 67,038

h .........................

ember .....................

4,162 

3,248 

2,758 

2,313 

2,389 

2,527 

2,139 

1,858 

3,444

ter year 1940-41 .......... 33,932

Mar.

116 

76 

98 

171 

190

120 

67 

178 

117 

66

83 

84 

66 

83 

67

113 

90 

39 

70 

59

71 

68 

89 

66 

66

66 

64 

66 

67 

66 

66

Maximum

78 

299 

338

845

294 

207 

190 

168 

121 

135 

122 

79 

216

338

Apr.

67 

64 

67 

66 

69

112 

67 

69 

85 

76

168 

67 

66 

66 

69

71 

95 

87 

69 

69

69 

69 

71 

69 

67

67 

127 

67 

71 

67

May

69 

69 

69 

81 

71

71 

71 

71 

67 

67

67 

72 

72 

72 

72

76 

85 

81 

89 

78

78 

82 

79 

102 

121

74 

74 

77 

73 

74 

85

Minimum

54 

58 

66

53

76 

76 

59 

64 

67 

74 

52 

53 

54

52

June

83 

81 

79 

73 

76

79 

94 

89 

35 

81

78 

93 

82 

76 

131

90 

76 

78 

79 

79

78 

78 

73 

80 

88

135 

79 

76 

74 

74

Mean

62.1 

91.2 

143

183

134 

116 

89.0 

77.1 

77.1 

84.2 

69.0 

59.9 

115

93.0

P 

sqi

mi

July

76 

74 

72 

71 

71

71 

71 

71 

71 

95

122 

52 

71 

66 

64

64 

64 

65 

64 

66

64 

66 

64 

66 

62

64 

69 

62 

61 

61 

59

Aug.

59 

79 

66 

59 

58

58 

58 

58 

53 

65

64 

61 

61 

56 

53

56 

56 

58 

56 

56

58 

61 

56 

56 

62

73 

64 

59 

62 

53 

54

Sept.

54 

68 

34 

109 

9O

SI 

60 

95 

96 

94

92 

89 

108 

08 

121

153 

188 

116 

216 

74

64

151 

130 

1S4 

182

115 

128 

56 

213 

213

er Bunoff

ie Inches Acre feet

3,820 

5,420 

8,790

2,13 23.99 133,000

8,260 

6,440 

5,470 

4,590 

4,740 

5,010 

4,240 

3,690 

6, 830

1.08 14.66 67,300

Mote.- Monthly discharge In second-feet per square mile and runoff In Inches not computed, owing 

to regulation. Yearly figures closely represent natural flow.
46 LAKE WASHINGTON BASIN 

Cedar River near Landsberg, Wash.

Location.- Water-stage recorder, lat. 47023'35", long. 121°56'50", in sec. 17, T. 22 N., 

R. 7 E., If miles upstream from Landsberg and intake of Seattle water-supply system, 

7 miles upstream from Maple Valley, and 12 miles downstream from Cedar Lake.

Drainage area.- 138 square miles (including that of Rock Creek).

Kecords avallable.- April 1914 to September 1941. July 1895 to September 1898 (at site 

2 miles downstream, published as Cedar River at Clifford Bridge, near Ravensdale, 

Wash.), and March 1901 to April 1912 (at site of Seattle water-supply intake, published as Cedar River near Ravensdale, Wash.).

Average discharge.- 43 years ('1895-1911, 1914-41), 690 second-feet (adjusted for Rock 

CreeK diversion since October 1932).

Extremes.- Maximum discharge during year, 1,050 second-feet (regulated) Nov. 28 (gage 

height, 2.52 feet); minimum, 226 second-feet (regulated) Oct. 8, 9 (gage height, 0.95 

foot).

1895-98, 1901-12, 1914-41: Maximum discharge observed, 13,600 second-feet Nov. 19, 

1911 (gage height, 9.7 feet, site and datum then in use); minimum observed, 83 secondfeet Sept. 19, 1898.

Remarks.- Records excellent except those for periods of no gage-height record, which are 

fair. All diversions except Rock Creek returned to river above station. Rock Creek 

which entered naturally just above gage has been diverted to a point below Seattle 

municipal water-supply intake to lessen danger of pollution. Monthly discharge adjusted for diversion estimated on basis of 11 discharge measurements, and relation 

of flow of Rock Creek to difference in discharge between records of Cedar River at 

Cedar Falls and near Landsberg. Flow of river partly regulated by Cedar Lake.

Cooperation.- Gage-height record collected in cooperation with city of Seattle.

Rating table, water year 1940-41 (gage height, in feet, and discharge, 

in second-feet)

1.0 242 1.4 395 2.0 700 

1.2 314 1.6 486

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

28 

27 

28 

29 

30 

31

Oct.

253 

258 

258 

252

240

238 

232 

229 

240 

266

310 

256 

253 

239

235

232 

229 

235 

232 

235

263 

242 

239 

292 

277

263 

252 

246 

264 

292 

296

Nov.

277 

281 

274 

263 

256

249 

263 

281 

281 

266

260 

252 

324 

266 

281

256 

258 

28? 

276 

298

273 

282 

264 

256 

308

328 

398 

477 

658 

629

Month

Oct 

NOT 

Dec

Ca.

Jam 

Febj 

Mar 

Apr 

May 

Jun< Jui:

Aup 

Sep

Wal

amber... ........

.endar year 1940

;er year 1940-41

Dec.

593 

549 

542 

560 

630

594 

589 

596 

584 

441

370 

348 

332 

310 

304

319 

315 

306 

328 

416

358 

341 

330 

326 

326

330 

345 

337 

366 

361 

345

Jan.

334 

326

318 

314 

314

314 

310 

389 

454 

454

464 

504 

482 

452 

436

442 

543 

474 

524 

402

378 

370 

366 

370 

382

416 

372 

361 

361 

361 

374

Feb.

3S7 

374 

388 

368 

362

373 

376 

358 

351 

364

377 

385 

372 

372 

388

364 

392 

390 

383 

374

367 

370 

417 

466 

471

474 

478 

488

Mar.

438 

392 

391 

419 

469

439 

352 

376 

438 

363

352 

351 

336 

342 

335

370 

346 

368 

340 

326

336 

342 

357 

330 

326

322 

326 

318 

322 

326 

318

Observed

I

Discharge In 

second-feet

Nazifflum

310 

 658 

630

1,360

543 

488 

469 

422 

410 

413 

368 

288 

438

658

Mininum

229 

249

304

229

310 

351 

318 

310 

310 

336 

288 

260 

262

229

Mean

253

311 

413

492

399 

394 

360 

335 

331 

360 

312 

275 

337

340

Runoff 

In 

acre-feet

15,570 

18, 480 

25,370

357,200

24,520 

21,880 

22, 150 

19,960 

20,360 

21,440 

19,180 

16,920 

20,060

245,900

Apr.

330, 

345 

330 

326 

334

393 

336 

334 

345 

342

422 

330 

322 

322 

336

343 

364 

354 

342 

326

322 

318 

314 

314 

314

310 

362 

312 

310 

310

May

310 

310 

310 

330 

320

320 

320 

320 

310 

310

310 

320 

320 

320 

320

330 

350 

340 

350 

340

345 

337 

348 

330 

394

327 

325 

338 

326 

323 

410

June

332 

361 

349 

341 

337

353 

413 

387 

378 

366

357 

370 

353 

346 

347

396 

341 

356 

376 

372

357 

351 

348 

350 

358

387 

364 

340 

338 

336

July

337 

330 

326 

318 

318

314 

318 

315 

317 

324

368 

314 

320 

320 

314

310 

310 

314 

310

303

303 

307 

303 

303 

296

296 

299 

296 

292 

288 

288

Aug.

288 

288 

268 

280 

280

280 

277 

277 

277 

284

284 

282 

281 

276 

274

270 

271 

271 

266 

266

266 

268 

270 

264 

268

284 

276 

279 

270 

268 

260

Sept.

262 

274 

298 

326 

322

310 

276 

296 

300 

327

321 

304 

322 

306 

384

413 

397 

378 

438 

336

300 

347 

409 

354 

378

340 

340 

271 

376 

408

Adjusted for diversion

Rock Creek 

Diversion 

(acre-feet)

1,290 

1,550 

2,890

18,200

2,340 

1,220 

1,410 

1,010 

1,050 

1,010 

430 

120 

650

14,970

Runoff 

In 

acre feet

16,860 

20,030 

28,260

375, 400

26,860 

23,100 

23, 560 

20,970 

21,410 

22,450 

19,610 

17,040 

20,710

260,900

Discharge In 

second- feet

Mean

274 

337

460

517

437 

416 

383 

352 

348 

377 

319 

277 

348

360

Per 

square 

mile

-

3.75

:

2.61

Runin 

Inches

1

51.04

:

35.43

_________I I___I____I_____I_______I_____I I I 

Note.- Monthly discharge in second-feet per square mile and runoff in inches not computed, owing 

to regulation. Yearly figures closely represent natural flow.
LAKE WASHINGTON BASIN 47

Sammamish Lake near Redmond, Wash.

Location.- Staff gage, lat. 47°39'00", long. 122 0 06'30n , in SEi sec. 13, T. 25 N., R. 5 

£., on left shore, half a mile upstream from outlet and If miles south of Redmond. 

Datum of gage Is 32.13 feet above mean lower low water (Corps of Engineers, U. S. Array, 

bench mark).

Drainage area.- 91 square miles.

Records available.- January 1939 to September 1941.

Extremes.- Maximum gage height observed during year, 3.59 feet Jan. 26; minimum observed, 

u.eo root Oct. 8.

1939-41: Maximum gage height observed, 6.05 feet Mar. 9, 10, 1940; minimum observed, 

0.25 foot Sept. 27, 30, Oct. 1, 1939.

Remarks^- Records excellent. Gage read once daily. No known diversion or regulation.

Gage height, In feet, water year October 1940 to September 1941

Day

1

2

S

4

S

6

7

8

9

10

11

12

15

14

IS

16

17

18

19

20

21

22

23

34 

25

26

27

28 

29 

30

31

Oct.

0.63

.61

.62

.63

.64

.62

.61

.60

.62

.68

.72

.76

.76

.75

.74

.73

.72

.77

.79

.86

.92

.93

.96

1.13 

1.20

1.22

1.22

1.24 

1.25 

1.32

1.38

Nov.

1.42

1.46

1.50

1.51

1.50

1.49

1.52

1.54

1.60

1.63

1.65

1.65

1.64

1.63

1.63

1.62

1.62

1.63

1.63

1.63

1.64

1.64

1.65

1.65 

1.65

1.66

1.69

1.74 

1.83 

1.92

Dee.

1.96

1.99

2.04

2.06

2.09

2.11

2.15

2.24

2.38

2.44

2.46

2.49

2.48

2.46

2.44

2.43

2.39

2.36

2.39

2.50

2.55

2.59

2.62

2.62 

2.66

2.72

2.79

2.83 

2.88 

2.93

2.98

Jan.

3.00

2.99

2.98

2.98

2.98

2.98

2.98

2.98

2.96

2.93

2.90

2.86

2.85

2.85

2.88

2.89

2.98

3.20

3.36

3.46

3.50

3.53

3.54

3.54 

3.56

3.59

3.57

3.54 

3.52 

3.48

3.49

Feb.

3.53

3.51

3.48

3.47

3.41

3.35

3.33

3.29

3.24

3.23

3.20

3.16

3.12

3.07

3.02

2.96

2.91

2.86

2.81

2.75

2.70

2.66

2.61

2.58 

2.56

2.52

2.52

2.54

-

Mar.

2.54

2.58

2.58

2.57

2.54

2.52

2.50

2.47

2.43

2.40

2.37

2.33

2.29

2.24

2.20

2.17

2.14

2.14

2.17

2.14

2.11

a. 14

2.13

2.11 

2.08

2.05

2.02

1.99 

1,96 

1.98

1.96

Apr.

1.96

2.01

2.01

2.01

2.01

2.01

2.01

2.00

2.00

1.99

1.97

1.95

1.91

1.91

1.99

2.05

2.06

2.05

2.05

2.02

1.99

1.97

1.94

1.92 

1.90

1.86

1.83

1.81 

1.78 

1.74

-

May

1.74

1.73

1.72

1.70

1.70

1.68

1.66

1.64

1.61

1.59

1.55

1.59

1.57

1.57

1.55

1.58

1.70

1.74

1.78

1.78

1.78

1.78

1.77

1.75 

1.74

1.72

1.72

1.71 

1.70 

1.69

1.78

June

1.84

1.84

1.84

1.84

1.84

1.84

1.84

1.86

1.85

1.83

1.82

1.80

1.80

1.79

1.78

1.76

1.75

1.75

1.77

1.83

1.84

1.83

1.82

1.79 

1.79

1.78

1.77

1.76 

1.74 

1.73

"

July

1.71

1.69

1.68

1.67

1.65

1.62

1.61

1.60

1.58

1.56

1.53

1.51

1.49

1.48

1.47

1.47

1.44

1.43

1.49

1.44

1.43

1.38

1.34

1.32 

1.31

1.31

1.29

1.27 

1.26 

1.24

1.22

Aug.

1.20

1.18

1.18

1.18

1.17

1.16

1.15

1.14

1.13

1.12

1.10

1.11

1.09

1.08

1.07

1.05

1.05

1.04

1.03

1.02

1.02

1.01

1.01

1.01 

1.02

1.01

1.02

1.03 

1.03 

1.02

1.04

Sept.

1.02

1.05

1.13

1.16

1.18

1.19

1.18

1.18

1.22

1.30

1.32

1.33

1.38

1.40

1.39

1.41

1.43

1.44

1.45

1.52

1.55

1.56

1.56

1.56 

1.56

1.56

1.56

1.54 

1.55 

1.57
48 LAKE WASHIN3TON BASIN 

Sammamlsh River near Redmond, Wash.

Location.- Staff gage, lat. 47°39'00", long. 122°06 ? 30", in SEi sec. 13, T. 25 N., R. 5 

 E., on left shore of Lake Sammamish, half a mile upstream from outlet and If miles 

south of Redmond. Datum of gage Is 32.13 feet above mean lower low water (Corps of 

Engineers, U. S. Array, bench mark). Discharge measurements made below mouth of Bear 

Creek.

Drainage area.- 140 square miles, including that of Bear Creek.

Records available.- January 1939 to September 1941 (Including flow of Bear Creek).

Extremes.- Maximum discharge observed during year, 370 second-feet Jan. 20-26; minimum 

observed, 56 second-feet Aug. 16-23.

1939-41: Maximum discharge observed, 689 second-feet Mar. 9, 10, 1940; minimum 

observed, 51 second-feet Sept. 27, 30, Oct. 1, 1939 (gage height, 0.25 foot).

Remarks.- Records fair. Gage read once daily. No known diversions or regulation. 

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

68

66

67

68

69

67

66

66

67

72

75

79

79

78

77

76

75

80

81

87

92

93

96

111

118

119

119

121

122

127

137

Nov.

137

142

147

147

147

147

147

152

157

162

162

162

162

162

162

157

157

162

162

162

162

162

162

162

162

162

167

172

182

188

-

Dec.

194

199

304

204

210

210

216

227

245

251

251

257

257

361

251

251

245

239

245

257

263

269

269

269

275

281

293

299

305

312

318

Jan.

318

318

318

31S

318

318

316

31S

312

312

305

299

299

299

305

305

3 IS

344

357

370

370

370

370

370

370

370

357

357

344

344

331

Feb.

344

344

331

331

331

324

318

318

312

312

312

305

299

299

293

2S7

281

275

269

263

263

257

251

251

251

245

245

251

_

_

-

Unn+h SecondBonth foot-days

October ....................... 2,718

November ...................... 4 ,776

December ...................... 7,817

Calendar year 1940 ......... 93 .784

January ....................... __ 1O.3PP ,_ _

February ...................... 8 ,162

March ......................... 7 ,024

April ......................... 5 ,816

May ........................... 4,842

June .......................... 3 ,764

July .......................... 2,400

August ........................ i 1 ,816

September ..................... | 2 ,623

Water year 1940-41 ......... .| 62,080

Uar.

251

257

257

257

257

257

361

251

251

245

239

239

233

227

221

216

216

216

216

216

210

21S

216

210

210

204

199

199

194

199

194

Maximum

137

1S8

318

689

37C

344

25V

204

172

162

97

62

10C

37C

Apr.

194

199

199

199

199

199

199

199

199

199

194

194

188

188

199

204

204

204

204

199

199

194

194

188

188

1S2

182

177

177

172

-

May

172

172

167

167

167

167

162

162

157

157

152

157

152

152

147

147

157

162

162

162

162

157

157

152

152

147

147

142

142

137

147

Minimum

66

137

194

62

299

245

194

172

137

98

62

56

61

56

June

152

147

147

147

142

142

142

142

137

137

132

132

127

126

124

121

119

117

118

121

120

118

116

112

110

108

106

104

100

98

-

Mean

8,7.7

159

252

266

333

292

227

194

156

126

77.4

5S.6

87.4

170

July

97

97

93

93

93

90

8S

87

S5

84

81

80

78

7S

76

76

74

73

77

73

72

69

68

66

66

66

65

65

64

64

62

Per 

square 

mile

.626

1.14

1.80

1,83

2.3S

2.09

1.62

1.39

1.11

.893

.553

.419

.624

1.21

Aug.

62

61

61

61

61

61

61

60

60

60

58

59

58

57

57

56

56

56

56

56

56

56

56

57

5S

57

58

60

60

60

61

Sept.

61

63

66

71

72

74

74

74

78

83

85

S7

90

93

93

93

93

93

93

100

100

100

100

100

100

97

97

97

97

97

-

Runoff

Inches

,72

1.27

2.08

24.91

2.74

2.17

1.87

1.54

1.29

1.00

.64

.48

.70

16.50

Acre-feet

5,390

9,470

15,500

186,000

20,470

16,190

13,930

11,540

9,600

7,470

4,760

3,600

5,200

123 ,100

Note.- Shifting-control method used Jan. 19 to Mar. S, May 12 to Sept. 50.
LAKE WASHINGTON BASIN 49

Samnamlsh River at Bothell, Wash.

Location.- Water-stage recorder, lat. 47°45 1 00", long. 122°ll'30It , In NWiSEJ sec. 8, T. 

£6 N., R. 5 E., in Bothell, a quarter of a mile downstream from North Creek and 4i 

miles upstream from mouth. Datum of gage Is mean lower low water at Seattle (Corps of 

Engineers, U. S. Army, bench mark).

Drainage area.- 199 square miles.

Records available.- October 1939 to September 1941.

Extremes.- Maximum discharge during year, 752 second-feet Jan 18 (elevation, 29.75 feet); 

minimum, 66 second-feet Aug. 21.

1939-41: Maximum discharge, 878 second-feet Mar. 5, 8, 9, 1940 (elevation, 30.1 

feet); minimum, that of Aug. 21, 1941.

Remarks.- Records good. No known diversions nor artificial regulation.

Discharge, In second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

122

113

108

106

102

100

98

98

99

116

134

122

126

120

116

114

113

120

144

176

169

144

149

214

197

170

169

154

170

232

220

Nov.

214

214

202

192

186

186

208

26E

288

260

23S

220

214

208

202

202

220

244

220

220

238

220

214

23S

232

220

244

295

308

276

Dec.

262

S62

S62,

262

282

276

869

336

349

321

308

295

888

262

276

276

276

282

314

480

391

363

356

377

391

391

436

406

420

406

406

Jan.

377

363

363

363

363

377

377

363

366

342

336

335

342

366

420

460

573

736

686

605

525

496

480

466

496

4SO

466

436

420

420

466

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

toy ...........................

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

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

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

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

Water year 1940-41 ..........

Feb.

526

4SO

450

436

420

405

391

391

391

391

391

377

363

356

349

342

8336

aSSO

321

314

314

308

308

308

308

308

328

349

_

-

Seccndfoo todays

4,313

6,876

119,333

13 ,626

10,288

9,008

8,160

6,103

4,656

2,889

2,266

3,628

81,987

Mar.

377

391

366

342

32S

321

314

308

296

288

288

282

276

269

269

269

262

288

295

282

269

288

282

276

269

262

266

266

260

250

260

Uaximun

232

308

480

878

736

626

391

391

296

232

120

77

164

736

Apr.

276

342

296

295

302

296

28S

276

276

276

262

266

250

260

391

356

321

302

282

269

262

260

244

238

232

226

220

208

208

202

-

May

202

197

197

202

214

208

197

180

186

ISO

1S6

192

180

1S6

ISO

192

296

276

238

220

208

197

1S6

176

170

170

170

169

169

164

257

Minimum

98

186

262

82

336

308

260

202

169

126

74

67

SO

67

June

232

202

186

176

170

170

176

170

164

159

154

149

149

149

144

144

144

144

154

164

149

144

144

139

139

134

134

130

130

125

-

Mean

139

229

332

326

440

367

291

272

197

165

93.2

72.8

118

226

July

120

US

114

112

110

allO

a

a

f

106

106

102

alOO

a96

a96

a96

a96

a90

a

Per 

square 

mile

.698

1.16

1.67

1.64

2.21

1.S4

1.46

1.37

.990

.779

.468

.366

.693

1.13

a90

aS5

aS4

100

a90

fS6

f64

83

83

SO

78

78

77

76

75

74

Aug.

74

76

C76

f74

74

73

74

72

72

71

71

76

74

72

72

71

70

69

69

67

67

69

77

77

74

a70

a76

a76

a76

a76

a75

Sept.

aSO

a9O

120

110

97

93

92

91

105

154

149

124

126

125

ISO

126

125

125

122

130

126

123

121

120

120

iei

120

ISO

125

125

~

Runoff

Inches

.81

1.28

1.92

S2.29

2.56

1.92

1.6S

1.62

1.14

.87

.64

.42

.66

15.31

Acre-feet

8,660

13,640

80,420

256 ,700

27,020

20,410

17,870

16,170 '

12,110

9,24O

6,730

4,470

7,000

162,600

a Ho gage-helgit record; discharge computed on basis of records for station near Redmond.

f Computed on basis of partly estimated gage-hei^it record.

Note.- Shifting-control method used Got. 1 to Dee. 7, Jan. 17-26, Feb. 2 to Sept. 30.
50 SNOHOraSH RIVER BASIN

South Fork of Skykomlsh River near Index, Wash.

Location.- Water-stage recorder, lat. 47°48'20", long. 121°32'40", in NEi sec. 29, T. 

27 N., R. 10 E., 600 1'eet upstream from Sunset Falls, 2 miles upstream from confluence 

with North Fork, and 2 miles southeast of Index. Datum of gage is 574.76 feet above 

mean sea level, datum of 1929. Discharge measurements made about 2 miles (revised) 

upstream from gage.

Drainage area.- 355 square miles.

Records available.- October 1902 to September 1905, April 1911 to September 1941.

Average discharge.- 33 years, 2,316 second-feet.

*

Extremes.- Maximum discharge during year, 13>000 second-feet Nov. 29 (gage height, 12.22 

feet); minimum, 291 second-feet Oct. 9 (gage height, 2.34 feet).

1902-5, 1911-41: Maximum discharge observed, 57,000 second-feet Dec. 18, 1917 

(gage height, 22.6 feet, site then in use); minimum observed, 214 second-feet Oct. 

15-21, 23, 1925.

Remarks.- Records good. No diversion or regulation.

Rating tables, water year 1940-41 (gage height, In feet, and discharge, In second-feet) 

(Shifting-control method used Dec. 9 to Jan. 15 and Apr. 2-24}

2.5 360

2.8 510

3.0 635

3.5 980

Oct. 1 to Apr. 10

4.0 1,370

4.5 1,790

5.0 2,240

6.0 3,190

Apr. 11 to Sept. 30

7.0 4,310

8.0 5,700

9.0 7,250

10.0 8,910

2.5 380 

2.S 536 

3.0 661 

3.5 1,010 

Mote.- Sane

4.0 

4.5 

5.0

1,410

1,810

2,240

table above 5.0 feet.

preceding

Discharge, In second-feet, water year October 1940 to September 1941

Day

1

2

5

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

Oct.

356

360

333

342

360

342

320

303

303

2,840

3,340

1,490

1,450

1,210

910

763

714

1,170

1,210

1,410

3,090

2,100

1,490

2,150

1,920

1,450

1,210

1,050

1,020

1,410

31 1,790

Nov.

1,570

1,490

1,410

1,250

1,130

1,020

1,170

1,490

1,330

1,130

1,020

910

S19

763

728

805

833

798

728

694

661

602

570

609

875

910

1,450

4,660

3,490

4,400

-

Dec.

3,090

3,190

3,600

3,090

3,090

3,290

2,690

3,600

3,090

2,420

1,970

1,700

1,490

1.330

1,210

1,090

1,020

1,020

1,050

2,020

1,740

1,740

1,530

1,410

1,330

1,330

1,330

1,370

1,530

1,490

1,330

Jan.

1,210

1,090

1,020

945

903

868

812

763

756

7S4

S12

854

896

945

945

al,050

a2,000

5,850

3,190

2,330

1,880

1,610

1,450

1,330

1,570

1,740

1,490

1,370

1,290

1,250

1,490

Month

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

Novembe r ......................

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

Calendar year 1940 ........

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

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

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

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

Mnu May ......................... .

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

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

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

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

Water year 1940-41 ..........

Feb.

2,150

1,970

1,700

1,530

1,370

1,290

1,250

1,210

1,130

1,090

1,090

1,050

1,020

945

889

854

819

791

770

756

735

728

721

721

714

700

770

1,130

_

_

-

Secondfoot days

38,206

44,315

61,180

611,622

44,493

29,893

37,486

49,190

67,190

42,415

20,036

11,883

47, 334

493.621

Mar.

1,490

1,920

1,490

1,290

1,170

1,130

1,090

1,170

1,170

1,090

1,020

980

945

889

868

889

945

1,090

1,170

1,090

1,020

1,050

1,050

9SO

980

1,090

1,290

1,490

1,700

1,970

1,970

Maximum

3,340

8,490

3,600

8,490

5,850

2,150

1,970

2,420

4,570

2,280

975

438

3,380

8,490

Apr.

2,150

2,420

1,970

1,660

1,570

1,610

1,490

1,450

1,530

1,660

1,610

1,490

1,370

1,370

1,690

1,530

1,410

1,370

1,330

1,330

1,450

1,530

1,650

1,650

1,770

1,810

1,810

1,690

1,850

1,970

-

May

1,930

1,770

1,730

1,530

1,650

1,650

1,490

1,330

1,210

1,210

1,530

2,790

2,240

2.020

1,730

2,250

4,570

3,820

2,990

2,990

2,890

2,690

2,690

2,600

2,420

2,060

1,810

1,730

1,650

1,530

2,690

Minimum

303

570

1,020

279

756

700

868

1,330

1,210

975

444

345

491

303

June

2,280

1,970

1,770

1,610

1,570

1,570

1,850

1,650

1,530

1,450

1,45.0

1,490

1,410

1,290

1,170

1,090

1,090

1,290

1,530

1,850

1,450

1,290

1,210

1,130

1,210

1,130

1,010

975

1,050

1,050

-

Mean

1,232

1,477

1,974

1,671

1,435

1,068

1,209

1,640

2,167

1,414

646

383

1,578

1,352

July

975

919

S91

863

828

814

814

772

744

696

675

661

654

654

654

648

648

616

590

560

542

519

491

508

508

480

480

470

464

454

444

Per 

square 

mile

3.47

4.16

5.56

4.71

4.04

3.01

3.41

4.62

6.10

3.98

1.82

1.08

4.45

3.81

Aug.

428

114

114

118

399

390

590

390

5S5

385

376

138

104

576

380

376

562

562

554

358

354

349

571

380

345

362

418

404

3S5

354

362

Sept.

491

502

969

1,610

1,090

849

863

696

842

2,230

1,770

1,490

2,240

3,390

3,880

3,380

3,460

2,420

1,970

2,020

1,690

1,410

1,250

1,130

1,010

975

905

842

800

1,110

~

Runoff

Inches

4.00

4.64

6.41

64.07

4.66

3.13

3.93

5.15

7.04

4.44

2.10

1.24

4.96

51.70

Ac re- feet

75,780

87,900

121,300

1,213,000

88,250

59,290

74,350

97,570

133,300

84,130

39,740

23,570

93,890

979,100

a No gage-height record; discharge computed on basis of records for Skykomlsh River near Sold Bar.
SNOHOMISH RIVER BASIN 51

Skykomish River near Gold Bar, Wash.

Location.- Water-stage recorder, lat. 47°50'15", long. 121°40'00n , in SWi sec. 9, T. 27 

N., R. 9 E., 2 miles southeast of Gold Bar and 5 miles upstream from Wallace River 

and Startup. Datum of gage is 210.01 feet above mean sea level, unadjusted.

Drainage area.- 535 square miles.

Records available.- September 1928 to September 1941.

Average discharge.- 13 years, 3,608 second-feet.

Extremes.- Maximum discharge during year, 21,600 second-feet Nov. 28 (gage height, 11.38 

feet); minimum, 473 second-feet Oct. 9 (gage height, 2.89 feet).

1928-41: Maximum discharge, 79,000 second-feet Dec. 21, 1933 (gage height, 21.3 

feet); minimum, 382 second-feet Oct. 9, 1938 (gage height, 2.78 feet).

Remarks.- Records excellent. No diversion or regulation.

Rating table

2.9 

3.1 

3.3 

3.6

water year 1940-41 (gage heignt, i 

in second- feet)

feet, and discharge,

480

635

SOO

1,070

4.0 

4.3 

4.6 

S.O

1,460

1,800

2,170

2,710

5.5 

6.0 

6.5 

7.0

3,430

4,240

5,110

6,050

7.5

8.0

9.0

10.0

7,200

S.600

11,300

15,700

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

699

675

5S7

611

635

595

540

518

495

6,000

5,990

2,570

2,500

1,980

1,570

1,260

1,210

2,710

2,780

3,060

5,560

3,740

2,640

3,500

3,200

2,430

2,040

1,740

1,740

2,500

3,280

Nov.

2,350

2,640

2,430

2,170

1,920

1,800

1,930

2,570

2,300

1,980

1,800

1,570

1,460

1,360

1,310

1,410

1,460

1,410

1,310

1,260

1,200

1,120

1,080

1,130

1,570

1,620

2,330

7,420

13,400

6,520

-

Dec.

4,750

a5,150

a6,440

a5,150

a5, 150

a5,540

a4,450

6,430

5,290

4,160

3,430

2,920

2,570

2,300

2,100

1,920

1,800

1,740

1,920

3,500

2,990

2,990

2,710

2,430

2,360

2,300

2,360

2,360

2,780

2,640

2,300

Jan.

2,040

1,800

1*680

1,620

1,520

1,460

1,410

1,310

1,310

1,410

1,460

1,520

1,570

1,620

1,620

1,800

2,980

8,600

5,110

3,740

3,060

2,570

2,300

2,100

2,640

2,850

2,430

2,240

2,100

2,040

3,500

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

3,580

3,360

2,850

2,500

2,300

2,100

2,040

1,980

1,800

1,800

1,800

1,740

1,680

1,570

1,460

1,410

1,360

1,310

1,260

1,230

1,210

1,190

1,160

1,170

1,170

1,140

1,260

2,040

_

_

-

Secondfoot-days

69,355

74,380

104,980

998,726

72,410

49,470

62,620

77,010

106,190

65,080

30,087

18,984

76,250

806,816

Mar.

2,640

3,280

2,640

2,240

1,980

1,860

1,360

1,920

1,920

1,740

1,680

1,620

1,520

1,460

1,410

1,460

1,520

1,800

1,920

1,800

1,620

1,800

1,740

1,620

1,620

1,800

2,240

2,500

2,850

3,280

3,280

Maximum

6,000

13,400

6,480

13,400

8,600

3,580

3,280

3,740

7,460

3,500

1,460

691

5,820

13,400

Apr.

3,430

3,740

2,990

2,570

2,430

2,500

2,300

2,240

2,360

2,500

2,430

2,300

2,100

2,100

2,640

2,430

2,170

2,100

2,040

2,100

2,240

2,430

2,640

2,710

2,850

2,920

2,920

2,710

2,920

3,200

-

May

3,060

2,850

2,730

2,430

2,640

2,710

2,360

2,100

1,920

1,920

2,500

4,410

3,580

3,280

2,780

3,890

7,460

5,850

4,580

4,580

4,410

4,240

4,160

4,160

3,740

3,280

2,850

2,710

2,570

2,430

3,960

Minimum

495

1,080

1,740

445

1,310

1,140

1,410

2,040

1,920

1,460

683

532

827

495

June

3,500

2,990

2,710

2,500

2,430

2,430

2,850

2,500

2,300

2,240

2,240

2,300

2,240

1,980

1,800

1,680

1,620

2,040

2,360

2,920

2,340

1,980

1,800

1,680

1,800

1,680

1,570

1,460

1,620

1,620

-

Mean

2,237

2,479

3,386

2,739

2,336

1,767

2,020

2,567

3,425

2,169

971

612

2,542

2,210

July

1,460

1,410

1,360

1,310

1,230

1,200

1,200

1,150

1,120

1,040

1,020

989

971

971

953

953

953

944

899

863

827

800

749

740

749

715

715

715

707

691

683

Per 

square 

mile

4.18

4.63

6.33

5.10

4.37

3.30

3.78

4.80

6.40

4.05

1.81

1.14

4.75

4.13

Aug.

659

535

527

559

635

611

511

511

511

619

587

567

559

595

587

595

563

563

548

555

548

532

635

683

571

587

691

691

659

595

595

Sept.

327

863

1,720

3,150

1,920

1,520

1,520

1,240

1,390

3,570

2,730

2,430

3,620

5,660

5,820

5,270

5,290

3,660

3,060

3,060

2,570

2,240

1,920

1,740

1,620

1,570

1,520

1,410

1,360

1,930

"

Runoff

Inches

4.82

5.17

7.30

69.41

5.03

3.44

4.35

5.35

7.38

4.52

2.09

1.32

5.30

56.07

Ac re- feet

137,600

147, 500

208,200

1,981,000

143,600

98,120

124,200

152,700

210, 600

129,100

59,680

37,650

151,200

1,600,000

discharge computed on basis of records for South Fork of Skykomish River
52 SNOHOMISH RIVER BASIN 

Snohomish River at Snohomish, Wash.

Location.- Water-stage recorder, lat. 47054'32", long. 122°06'00", in SEi sec. 13, T. 29N. 

K. 5 K., on downstream end of arawrest of bridge No. 205 on State Highway 1A in 

Snohomish. Auxiliary water-stage recorder, lat. 47°54 I 14", long. 122°08'15", In lot 3, 

SEi sec. 10, T. 29 N., R. 5 E., on right bank of river at downstream end of county 

road trestle over railroad tracks and about 2 miles west of Snohomish. Datum of both 

gages is 10.00 feet below mean sea level, datum of 1929.

Drainage area.- 1,700 square miles.

Records available.- February to September 1941 (flood discharges only). The Northern 

Pacific R. R. Co. has record of gage heights ^t their bridge a quarter of a mile upstream since 1906. High-water elevations prior to 1932 and high-water profiles on 

flood peaks since that time are available at the Seattle office of Corps of Engineers, 

U. S. Army.

Extremes.- Maximum discharge during period February to September, 22,200 second-feet 

nay 18 (gage height, 18.14 feet); maximum gage height, 19.33 feet May 18, affected by 

backwater from tide.

Maximum stage known, 35 feet at base gage and 31 feet at auxiliary gage in 1906, 

from flood profile furnished by Corps of Engineers, U. S. Army.

Remarks.- Records good. No appreciable regulation or diversion at stages for which dis- 

- cnarges are published.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct. Nov. Dec. Jan. Feb. Mar. Apr. Hay

_

_

_

-

~

_

_

-

_

w

-

17,600

19,700

14,300

12,600

12,100

10,800

_

-

_

_

_

_

-

June July Aug. Sept.

_

-

-

-

-

_

-

-

»

-

_

.

_

13 ,700

18,000

13,600

15,100

11,400

-

_

_

_

_

-

_

_

_

_

-
SNOHOMISH RIVER BASIN 

Troublesome Creek near Index, Wash.

53

Location.- Water-stage recorder, lat. 47°54'00", long. 121°23'50n , in NEi sec. 21, T. 28 

N., R. 11 E. (unsurveyed), a quarter of a mile upstream from mouth and 9 miles northeast of Index.

Drainage area.- 10.4 square miles at measuring section, li miles upstream from gage.

Records available.- July 1929 to October 1941 (discontinued).

Average discharge.- 12 years, 114 second-feet.

Extremes.- 1940-41: Maximum discharge during water year, 575 second-feet Oct. 10 (gage 

height, 3.36 feet); minimum, 19 second-feet Jan. 9; minimum gage height, 0.59 foot 

Oct. 9.

1929-41: Maximum discharge, 2,300 second-feet Dec. 21, 1933 (gage height, 7.0 feet), 

from rating curve extended above 750 second-feet; maximum gage height, 7.54 feet Feb. 

26, 1932; minimum discharge, 10 second-feet Nov. 17, 18, 19, 1936.

Remarks.- Records fair; they represent discharge at measuring section, li miles above 

gage. No diversion or regulation.

Discharge, in second-feet, 1940-41 

1940-41

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

36

32

29

28

29

28

27

26

26

296

316

153

126

98

76

65

63

244

244

237

285

199

137

149

122

98

81

72

67

86

129

Nov.

112

98

88

79

71

67

69

75

73

68

60

52

44

39

36

40

42

41

38

34

32

30

29

28

37

41

51

147

288

202

Dec.

134

125

170

138

154

177

154

206

167

115

88

65

55

45

40

34

30

35

44

86

63

65

59

55

57

57

61

67

75

65

53

Jan.

46

39

32

29

26

24

22

20

20

25

30

33

34

35

34

36

74

284

187

112

85

71

59

51

57

67

64

57

53

53

66

Feb.

85

88

81

70

60

52

47

45

40

38

38

38

36

34

32

29

28

27

25

24

24

23

23

23

23

24

26

46

-

.

-

Mar.

70

88

81

73

64

56

51

49

49

47

44

42

39

36

34

34

36

42

46

46

43

44

44

41

40

44

50

64

79

95

98

Apr.

101

104

92

80

71

68

63

57

56

60

64

62

57

54

57

63

61

58

54

52

55

64

75

79

86

89

88

82

89

97

-

May

96

90

85

76

76

79

73

65

57

55

73

135

132

118

101

130

204

179

153

136

118

114

122

129

123

107

92

83

76

70

97

June

102

93

84

78

78

82

93

85

75

70

83

98

101

90

81

70

63

74

86

97

86

85

88

82

82

80

73

73

83

85

July

82

76

75

70

66

64

69

66

60

55

54

54

57

60

65

70

71

69

64

56

51

43

37

35

34

33

35

37

36

36

36

Aug.

34

31

29

28

26

25

26

29

32

34

34

37

37

34

35

34

33

32

32

34

35

34

41

41

32

32

36

36

33

30

30

Sept.

42

49

76

152

116

95

86

70

67

109

101

96

150

261

215

239

219

153

116

100

85

75

68

64

60

62

. 63

56

51

70

Hpte.- Ho gage-height record Dec. 12, 1940, to Jan. 2; discharge computed on basis of records for 

Sultan River near Startup. Shifting-control method used May 23 to June 22.

Day

1

2

3

4

5

6

7

8

9

10

Oct.

250

209

314

315

180

144

235

342

410

494

Day

11

12

13

14

15

16

17

18

19

20

Oct.

445

394

271

177

143

200

170

140

130

100

Day

21

22

23

24

25

26

27

28

29

30

31

Oct.

90

80

70

60

50

50

40

40

40

30

30

Mote.- No gage-height record Oct. 16- 

31; discharge computed on basis of records for Sultan River near Startup.

Monthly discharge, in second-feet, 1940-41

Month

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

Water year 1940-41 ..........

October 1941. .................

Secondfoot-days

3,604 

2,111 

2,739

29,737

1,825 

1,129 

1,669 

2,138 

3,244 

2,500 

1,716 

1,016 

3,166

26,857

5,643

Maximum

316 

288 

206

321

284 

88 

98 

104 

204 

102 

82 

41 

261

316

494

Minimum

26

28 

30

20

20 

23 

34 

52 

55 

63 

33 

25 

42

20

30

Mean

116 

70.4 

88.4

81.2

58.9 

40.3 

53.8 

71.3 

105 

83.3 

55.4 

32.8 

106

73.6

182

Per 

square 

mile

11.2 

6.77 

8.50

7.81

5.66 

3.88 

5.17 

6.86 

10.1 

8.01 

5.33 

3.15 

10.2

7.08

17.5

Runoff

Inches

12.89 

7.55 

9.79

106.34

6.53 

4.04

5.97 

7.65 

11.60 

8.94 

6.14 

3.63 

11.32

96.05

20.18

Acre-feet

7,150 

4,190 

5,430

58,990

3,620 

2,240 

3,310 

4,240 

6,430 

4,960 

3,400 

2,020 

6,280

53,270

11,190
54 SNOHOMISH RIVER BASIN

Sultan River near Startup, Wash.

Location.- Water-stage recorder, lat. 47°58'30", long. 121°46'30", In NEi sec. 28, T.

 29 N., R. 8 E., It miles upstream from intake of Everett water-supply system and 7£ 

miles north of Startup.

Drainage area.- 75 square miles.

Records available.- May 1934 to September 1941.

Extremes.- Maximum discharge during year, 9,190 second-feet Oct. 10 (gage height, 12.65

 feet), from rating curve extended above 3,000 second-feet; minimum, 50 second-feet 

Aug. 21, 22 (gage height, 3.36 feet).

1934-41: Maximum discharge, 15,600 second-feet Oct. 24, 1934 (gage height, 16.05 

feet), from rating curve extended above 3,000 second-feet; minimum, that of Aug. 21, 

22, 1941; minimum gage height, 3.32 feet Sept. 22, 23, 24, 1938.

Remarks.- Records excellent except those for periods of no gage-height record and those

 above 3,000 second-feet, which are fair. No diversion or regulation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet) 

Oct. 1 to Feb. 28 Mar. 1 to Sept. 30

3.9 

4.1 

4.4 

4.7 

5.0

103

136

193

262

346

5.5 

6.0 

6.5 

7.0 

7.5

515

750

1,020

1,370

1,770

8.0 2,250

9.0 3,400

10.0 4,800

4.4 210

4.7 285

5.0 375

5.5 555

6.0 770

6.5 1,050

7.0 1,380

7.5 1,770

Note.- Same as preceding table above 7.5 

Discharge, in second-feet, water year October 1940 to September 1941

Pay

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

414

223

179

257

235

177

147

129

148

4,500

2,330

900

940

700

500

390

305

1,030

1,280

1,690

2,260

1,050

725

1,090

825

555

439

383

530

1,480

1,370

Nov.

960

825

700

565

477

625

825

1,020

725

515

435

374

337

313

310

355

383

349

302

280

262

237

221

267

578

477

962

2,960

3,390

1,660

-

Dec.

1,120

1,230

1,980

1,160

1,470

1,300

1,380

2,680

1,500

900

650

515

432

377

334

299

270

275

435

1,370

700

750

555

515

535

535

625

775

1,160

750

535

Jan.

426

365

319

299

270

310

300

300

340

380

430

430

430

430

430

600

2,000

2,200

1,500

1,150

900

7OO

540

620

820

780

720

620

540

520

700

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

Jnly ......... ................

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

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

Water year 1940-41 ..........

Feb.

900

SOO

700

555

477

416

435

380

340

34.3

380

362

322

288

260

240

226

214

201

191

183

177

173

199

204

206

338

850

_

_

-

Secondfoot-days

27,231

21,679

27,612

216,137

20,369

10,360

12,178

11,575

22,626

11,432

4,161

2,325

23,473

195,021

Mar.

820

870

575

462

400

396

366

354

327

300

278

260

240

222

208

206

215

380

462

366

306

462

406

333

315

351

431

445

462

498

462

Maximum

4,500

3,390

2,680

4,500

2,200

900

870

595

3,220

358

280

135

2,640

4,500

Apr.

498

595

462

389

420

445

386

348

3S2

442

428

375

333

327

480

445

392

357

333

327

342

345

354

330

357

360

342

315

309

357

-

May

345

313

417

369

515

615

462

389

333

330

462

770

555

555

480

2,020

3,220

1,660

1,050

1,200

930

795

702

615

535

445

400

438

396

363

942

Minimum

129

221

270

54

270

173

206

309

318

220

74

51

188

51

June

635

480

417

360

339

357

480

389

389

360

345

330

306

272

248

230

220

428

635

858

498

396

336

294

318

315

265

260

336

336

-

Mean

878

723

891

591

657

370

393

386

730

381

134

75.0

782

534

July

2SO

250

225

206

192

184

176

168

156

145

138

133

127

120

116

110

116

131

114

106

105

101

98

94

91

87

83

80

79

76

74

Per 

square 

mile

11.7

9.64

11.9

7. 83

8.76

4.93

5.94

5.15

9.73

5.08

1.79

1.00

10.4

7.12

Aug.

73

71

73

73

75

70

67

64

62

60

60

65

62

59

57

55

53

53

52

51

51

51

106

92

79

98

116

135

119

101

122

Sept.

215

188

1,200

1,400

595

462

462

327

600

1,580

770

870

1,620

2,640

1,700

1,500

1,140

820

725

702

535

445

382

333

294

354

375

312

303

624

-

Runoff

Inches

13.50

10.75

13.69

107.17

10.10

5.14

6.04

5.74

11.22

5.67

2.06

1.15

11.64

96.70

Acre-feet

54,010

43,000

54,770

428,700

40,400

20,550

24,150

22,960

44,880

22,680

8,250

4,610

46,560

386,800

Note.- No gage-height record Oct. 13-16, Jan. 5 to Feb. 3; discharge compute 

ange of stage, one discharge measurement, and.records for Tolt River near Tolt

iputed on basis of recorded
SNOHOMISH RIVER BASIN 55

Snoqualmie River near Tolt, Wash.

Location.- Water-stage recorder, lat. 47°39'55n long. 121°55'30n , in sec. 9, T. 25 N., 

R. 7 E., 100 feet downstream from highway bridge, 1 mile northwest of Tolt, and 2 

miles downstream from Tolt River. Datum of gage is at mean sea level, unadjusted. 

Auxiliary water-stage recorder, lat. 47°39'00", long. 121°55'25", in SWi sec. 16, T. 

25 N., R. 7 E., at Tolt, three-quarters of a mile downstream "'from Tolt River and 1-i 

miles upstream from main gage. Datum of gage is at mean sea level, unadjusted.

Drainage area.- 605 square miles.

Records available.- October 1928 to September 1941.

Average discharge.- 13 years, 3,526 second-feet.

Extremes.- Maximum discharge during year, 20,000 second-feet NOV. 29 (elevation, 53.18 

reet); minimum not determined (occurred when water was below intakes for part of each 

of many days during August).

1929-41: Maximum discharge, 51.000 second-feet Feb. 26, 1932; maximum elevation 

recorded, 59.9 feet (present datum), Nov. 13, 1932; minimum discharge, 329 second-feet 

Sept. 9, 1940; minimum elevation, 43.30 feet (present datum), Sept. 11, 1930.

Remarks.- Records good except those for period of doubtful gage-height record, which are 

 fair. Low-water flow diverted for operation of power plant Snoqualmie Falls but 

returned to river above gage. Some diurnal fluctuation caused by power plant.

Rating tables, water year 1940-41 (elevation, in feet, and discharge, in second-feet)

(Shifting-control method used Aug. 1 to Sept. 30) 

Oct. 1 to Nov. 28 Nov. 29 to Sept. 30

45.0 515

45.5 960

46.0 1,530

46.5 2,230

47.0 3,070

48.0 5,100

49.0 7,320

44.3 416

44.5 520

44.8 705

45.0 843

45.5 1,230

46.0 1,720

46.5 2,400

47.0 3,250

48.0 5,330

49.0 7,600

50.0 10,100

52.0 16,000

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

612

725

629

620

716

725

638

579

587

2,290

7,320

2,890

2,310

2,160

1,610

1,320

1,160

1,290

1,500

1,760

3,700

3,550

2,230

3,320

3,850

2,640

2,080

1,800

1,690

2,310

3,750

Nov.

2,980

2,720

2,640

2,390

2,010

1,870

1,870

2,640

2,720

2,310

2,010

1,870

1,670

1,570

1,530

1,580

1,660

1,670

1,490

1,460

1,480

1,390

1,320

1,360

1,940

2,230

2,820

6,930

18,300

9,320

-

Dec.

5,770

5,770

5,990

5,770

4,890

5,550

4,670

6,440

6,670

4,890

3,830

3,250

2,800

2,560

2,320

2,180

2,040

1,970

2,040

4,900

4,140

3,440

3,160

2,800

2,720

2,800

2,980

3,070

4,140

3,830

3,340

Jan.

2,890

2,560

2,320

2,250

2,110

2,110

2,040

1,970

1,970

2,110

2,180

2,180

2,250

2,250

2,320

2,320

3,540

9,580

6,670

4,560

3,630

3,070

2,720

2,480

2,980

3,540

2,890

2,560

2,400

2,250

2,480

Month

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

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

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

Calendar year 1940. . .........

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

Februsry ......................

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

4,140

3,540

2,890

2,560

2,320

2,180

2,180

2,110

1,970

2,040

2,040

2,040

1,970

1,840

1,720

1,660

1,560

1,610

1,560

1,510

1,510

1,460

1,460

1,410

1,510

1,510

1,560

2,180

-

-

-

Secondfoot-days

62,361

87,750

120,720

1,030,131

91,180

56,040

59,930

66,900

95,240

67,490

29,935

16,226

90,969

844,741

Mar.

2,640

3,730

2,890

2,320

2,110

1,970

1,900

,900

,970

,840

,780

',610

,560

,560

,510

1,460

1,460

1,610

1,900

1,840

1,610

1,720

1,900

1,720

1,660

1,610

1,780

1,900

2,040

2,180

2,250

Maximum

7,320

18,300

6,670

18,300

9,580

4,140

3,730

3,250

7,360

4,040

1,560

634

8,320

18,300

Apr.

2,400

3,250

2,720

2,320

2,110

2,480

d2,400

d2,250

da, 250

d2,250

d2,110

d2,040

dl,900

dl,900

2,560

2,800

2,560

2,320

2,180

2,110

2,110

2,110

2,040

2,040

1,970

2,040

1,970

1,900

1,840

1,970

May

1,970

1,900

1,900

1,900

2,180

2,480

2,110

1,970

1,840

1,660

1,780

3,020

2,890

2,560

3,070

2,680

7,360

7,360

5,770

5,110

5,000

4,140

3,630

3,250

2,890

2,560

2,250

2,250

2,250

2,110

3,400

Minimum

579

1,320

1,970

420

1,970

1,410

1,460

1,840

1,660

1,560

543

446

590

446

June

4,040

2,890

2,480

2,250

2,110

2,110

2,800

2,720

2,560

2,480

2,250

2,180

2,040

1,900

1,780

1,660

1,560

1,840

2,800

3,630

2,720

a2,430

a2,130

1,840

1,900

1,840

1,720

1,610

1,560

1,660

-

Mean

2,012

2,925

3,894

2,815

2,941

2,001

1,933

2,230

3,072

2,250

966

523

3,032

2,314

July

1,560

1,510

1,410

1,410

1,360

1,320

1,230

1,230

1,110

1,070

1,030

1,030

990

9S2

975

886

879

908

843

843

836

815

712

705

705

679

653

578

561

572

543

Per 

square 

mile

3.33

4.83

6.44

4.65

4.86

3.31

3.20

3.69

5.08

3.72

1.60

.864

5.01

3.82

Aug.

549

532

520

549

537

526

509

509

509

49S

509

509

532

520

493

488

482

482

471

471

456

446

515

566

532

537

603

621

634

578

543

Sept.

590

719

1,270

4,690

2,480

1,610

1,410

1,230

1,290

4,520

4,140

3,070

4,250

5,990

8,320

5,990

7,130

4,670

3,630

4,560

3,730

2,800

2,250

1,900

1,660

1,560

1,460

1,360

1,280

1,410

-

Runoff

Inches

3.83

5.39

7.42

63.32

5.60

3.44

3.68

4.11

5.85

4.15

1.84

1.00

5.59

51.90

Acre-feet

123,700

174,000

239,400

2,043,000

180,900

111,200

118,900

132,700

188,900

133,900

59,380

32,180

180,400

1,676,000

a Ho gage-height record; discharge interpolated.

d Doubtful gage-height record; discharge computed on basis of gage-height record traced from 

recorder roller.
56 SNOHOMISH RIVER BASIN 

North Fork of Snoqualmie River near Snoqualmie Falls, Wash.

Location - Water-stage recorder, lat. 47°37'10", long. 121°42 1 35", in SWi sec. 30, T. 25 Location, water stag ^^ -^ Calllgan Creek> 8 mlles northeast of Snoqualmie

Falls, 9 miles northeast of Snoqualmie, and 9i miles upstream from mouth. 

Drainage area.- 65 square miles. 

Records available.- August 1929 to September 1941. 

Average discharge.- 12 years, 481 second-feet.

S -t. xsr- , feet), from rating curve extended above 1,500 second-feet; minimum, 30 second-feet

Sept. 17-19, 1929.

Remarks.- Records excellent except those for periods of no gage-height record, which are 

 poor. No diversion or regulation.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

2.2 54 3.O 146 4. 

2.4 71 3.3 197 5. 

2.6 92 3.6 259 6. 

2.8 117 4.0 361 8.

Discharge, in second-feet, water year October

Day

1 

2

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29

30 

31

Oct.

si

so

66

81 

10S

84 

70 

62 

60 

1,520

1,300 

420 

516 

347 

239

192 

164 

220 

231 

333

990 

483 

307 

S10 

516

333 

259 

21S 

235 

628 

1,010

Nov.

451 

405 

390 

323 

268

237 

347 

451 

361 

275

239 

210 

195 

1S6 

195

226 

235 

220 

192 

177

167 

152 

144 

194 

390

323 

808 

2,140 

2,260 

900

Dec.

700 

820 

1,040 

680 

7SO

661 

790 

1,20O 

900 

650

500 

430 

360 

320 

280

250 

200 

200 

300 

700

490 

410 

340 

310 

300

320 

470 

600 

900 

630 

460

Jan.

380 

310 

280 

260 

240

250 

250 

240 

280 

320

360 

350 

350 

330 

330

350 

1,000 

1,200 

750 

516

405 

333 

290 

2SO 

436

467 

347 

300 

2SO 

280 

422

Feb.

720 

500 

376 

304 

275

250 

277 

246 

222 

248

246 

244 

21S 

197 

179

167 

160 

152 

146 

142

137 

132 

130 

140 

142

134 

174 

396

Month forays

Octo 

Hove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

ffa

ber .......................

mber ......................

lendar year 1940 

ary

1

ember .....................

11,963 

13,061 

16,991

37,801

12,186 

6,654 

7,264 

8,537 

14,822 

9,573 

3,000 

1,700 

17,209

ter year 1940-41 .......... 122,960

Mar.

467 

604 

347 

26S 

231

220 

220 

222 

216 

192

177 

165 

152 

146 

140

136 

138 

174 

226 

208

177 

21S 

233 

197 

183

195 

264 

261 

280 

317 

290

Maximum

1,520 

2,260 

1,200

2,260

1,200 

720 

604 

436 

1,520 

772 

190 

86 

1,300

2,260

Apr.

361 

436 

312 

261 

24S

323 

282 

241 

248 

290

2S7 

270 

233 

226 

376

347 

304 

304 

292 

284

2S4 

277 

270 

252 

259

264 

259 

233 

246 

268

5 516 

0 700 

0 1,120 

0 2,170

1940 to September

May

270 

241 

270 

239 

361

376 

294 

268 

229 

220

302 

550 

390 

376 

302

690 

1,520 

1,080 

620 

922

780 

642 

533 

467 

390

330 

284 

32S 

312 

262 

754

Minimum

60 

144 

200

38

240 

130 

136 

226 

220 

192 

56 

41 

126

41

June

550 

405 

333 

290 

266

332 

451 

361 

376 

333

294 

264 

239 

218 

201

192 

192 

373 

661 

772

420 

268 

230 

200 

300

231 

208 

195 

206 

212

Mean

386 

435 

548

377

393 

23S 

234 

285 

478 

319 

96.8 

54.8 

574

337

1941

July

190 

172 

159 

151 

142

134 

130 

121 

116 

109

104 

99 

96 

91 

88

84 

81 

79 

76

73

70 

68 

66 

66 

72

66 

63 

60 

60 

58 

56

Per 

square 

mile

5.94 

6.69 

8.43

5.80

6.05 

3.66 

3.60 

4.38 

7.35 

4.91 

1.49 

.843 

8.83

5.18

Aug.

55 

54 

55 

56 

55

54 

51 

51 

49 

48

47 

46 

46 

45 

44

44 

44 

44 

42 

42

42 

41 

60 

62 

57

68 

84 

86 

S3 

74 

71

Sept.

133 

126 

902

938 

483

323 

292 

216 

446 

1,120

700 

680 

1,040 

1,210 

1,300

1,140 

1,020 

661 

550 

900

536

436 

347 

297 

257

239 

216 

199 

193 

259

Runoff

Inches

6.84 

7.47 

9.72

78.83

6.97 

3.81 

4.16 

4.88 

8.48 

5.48 

1.72 

.97 

9.85

70.35

Acre-feet

23,730 

25,910 

33,700

273,300

24,170 

13,200 

14,410 

16,930 

29,400 

18,990 

5,950 

3,370 

34,130

243,900

Hote.- Ho gage-height record Dec. 7 to Jan. 19, June 23-25, Aug. 12-15; discharge computed on basis 

" records for Tolt River near Tolt.
SNOHOMISH RIVER BASIN 

Tolt River near Tolt, Wash.

57

Location.- Water-stage recorder, lat. 47°41'45", long. 121°49'30", In SiNEi sec. 31, T. 

26 N., R. 8 E., 500 feet downstream from the Forks and 6 miles northeast of Tolt. 

Datum of gage is approximately 348 feet above mean sea level (river-profile survey).

Drainage area.- 80 square miles.

Records available.- August 1938 to January 1933, September 1937 to September 1941.

Extremes.- Maximum discharge during year, 8,350 second-feet Nov. 38 (gage height, 10.75 

feet), from rating curve extended above 4,500 second-feet; minimum, 77 second-feet 

Aug. 30-23 (gage height, 4.33 feet).

1928-32. 1937-41: Maximum discharge, 9,750 second-feet Apr. 18, 1938 (gage height, 

11.51 feet), from rating curve extended above 4,500 second-feet; minimum, 63 secondfeet Sept. 25, 26, 1940; minimum gage height, 4.07 feet Sept. 23, 1938.

Remarks.- Records good except those for period of no gage-height record, which are poor. 

No diversion or regulation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet) 

(Shifting-control method used Oct. 1 to Nov. 1}

Oct. 1 to Nov.-28 Nov. 28 to Sept. 30

4.4 105 5.3 339 6.6 1,050 

4.6 143 5.6 453 7.0 1,420 

4.8 1S9 5.9 588 7.5 1,950 

5.0 243 6.2 760 S.5 3,230

Discharge, in second- feet, water year October

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

210 

135 

115 

141 

158

121 

100 

39 

85 

1,910

1,300 

466 

517 

382 

286

232 

204 

266 

362 

541

9SO 

562 

398 

709 

608

433 

349 

312 

376 

880 

752

Nov.

&640 

&510 

a430 

a390 

a350

a400 453' 

569 

517 

425

375 

339 

312 

305 

302

322 

32S 

318 

392 

280

264 

243 

232 

333 

583

450 

978 

3,280 

2,320 

1,130

Dec.

852 

1,070 

1,170 

821 

822

775 

910 

1,660 

1,130 

761

610 

522 

466 

414 

37S

348 

323 

326 

409 

959

558 

503 

457 

439 

439

444 

563 

711 

1,190 

748 

578

Jan.

494 

439 

397 

381 

358

366 

34S 

337 

370 

439

466 

457 

457 

444 

435

489 

1,590 

'fl,7SO 

f976 

685

547 

475 

426 

418

71S

7OO 

518 

466 

431 

422 

541

Feb.

746 

600 

4S9 

422 

3S5

354 

381 

340 

316 

362

351 

34O 

313 

293 

281

265 

253 

242 

233 

225

217 

209 

207 

214 

214

212 

292 

467

unnth SeoondMonth foot-days

Octc 

Move 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

mber ......................

lendar year 1940 

ary . . .

...... . . 1

1 .........................

st ........................

ember .....................

13,979 

17,670 

21,356

73,357

17,370 

9,223 

3,959 

8,670 

14,510 

10,822 

4,497 

2,337 

15,874

ter year 1940-41 .......... 145,817

Mar.

484 

702 

413 

348 

303

300 

293 

293 

274 

253

236 

225 

209 

202 

194

192 

192 

264 

330 

262

227 

327 

313 

265 

247

253 

274 

271 

274 

278 

256

Maximum

1,910 

3,280 

1,660

3,230

1,780 

746 

702 

422 

1,760 

710 

247 

128 

1,060

3,280

Apr.

306 

385 

316 

290 

290

340 

300 

268 

273 

316

323 

306 

271 

262 

422

385 

348 

334 

310 

290

27S 

265 

253 

239 

233

227 

220 

209 

202

204

4.4 102 5. 

4.7 158 6. 

5.0 230 6. 

5.4 358 7.

1940 to September

May

207 

197 

236 

230 

358

362 

284 

259 

222 

207

2?2 

371 

316 

390 

300

788 

1,760 

1,340 

850 

S22

668 

518 

435 

374 

334

306 

290 

340 

306 

300 

918

Minimum

85 

232 

323

63

337 

207 

192 

202 

197 

227 

100 

77 

144

77

June

629 

457 

37S 

337 

310

391 

4SO 

378 

397 

374

323 

297 

2S4 

262 

244

227 

227 

346 

599 

710

428 

337 

310 

278 

407

326 

27S 

256 

274 

278

Mean

451 

539 

689

475

560 

329 

289 

289 

468 

361 

145 

93.1 

529

399

S 532 

2 761 

6 1,060 

0 1,440

1941

July

247 

225 

SIS 

199 

190

132 

ISO 

173 

165 

160

154 

150 

146 

140 

136

132 

128 

127 

121 

123

119 

116 

116 

114 

114

110 

107 

105 

104 

102 

100

Per 

square 

mile

5.64 

7.36 

8.61

5.94

7.00 

4.11 

3.61 

3.61 

5.85 

4.51 

' 1.81 

1.16 

6.61

4.99

Aug.

99 

98 

93 

93 

96

93 

92 

83 

37 

37

87 

87 

87 

84 

83

82 

80 

79 

7S 

77

77 

77 

114 

100 

90

100 

114 

128 

125 

102 

100

Sept.

144 

148 

897 

S76 

427

300 

259 

204 

496 

1,060

624 

51S 

1,010 

1,020 

944

942 

7S7 

563 

513 

802

518 

410 

344 

306 

281

271 

247 

233 

233 

497

Runoff

Inches

6.50 

8.21 

9.93

80.32

8.07 

4.29 

4.16 

4.03 

6.75 

5.03 

2.09 

1.34 

7.38

67.78

Ao re-feet

27,730 

35,050 

42,360

344,800

34,450 

18,290 

17,770 

17,200 

28,780 

21,470 

8,920 

5,730 

31,490

289,200

a No gage-height record; discharge computed on basis of recorded range of stage, two discharge 

easurements, and records for Sultan River near startup. 

f Computed on basis of partly estimated gage-height record.
58 STILLAGUA1HSH RIVER BASIN

South Fork of Stillaguamish River near Granite Falls, Wash.

Location.- Water-stage recorder, lat. 48°06'1011 , long. 121°56'40", In SWiNWi sec. 8, T. 

30 N., R. 7 E., ll miles upstream from Canyon Creek and 2 miles northeast of Granite 

Falls.

Drainage area.- 119 square miles.

Records available.- July 1928 to September 1941.

Average discharge.- 13 years, 997 second-feet.

Extremes.- Maximum discharge during year, 9,240 second-feet Oct. 10 (gage height, 10.76 

feet), from rating curve extended above 6,000 second-feet; minimum, 74 second-feet 

Aug. 19-21 (gage height, 2.99 feet).

1923-41: Maximum discharge, 26,700 second-feet Feb. 26, 1932 (gage height, 19.7 

feet, from graph based on gage readings), from rating curve extended above 6,000 

second-feet; minimum, 55 second-feet Sept. 23, 24, 1938; minimum gage height, that of 

Aug. 19-21, 1941.

Remarks.- Records excellent. No diversion or regulation.

Rating table, water year 1940-41 (gage height, in feet, and discnarge, in second-feet)

3.2 

3.5 

4.0

106

174

334

4.5 

5.0 

5.5

565

S90

1,270

6.0 

7.0 

S.O

1,730

2,920

4,400

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

267

199

149

253

229

166

13S

120

131

4,360

3,640

l.OSO

960

631

446

357

309

1,690

1,340

2,130

2,360

1,230

390

1,450

1,070

711

543

460

719

2,580

2,940

Nov.

1,630

1,360

1,150

834

673

1,280

1,450

1,730

1,150

7S5

625

510

451

433

424

442

505

500

415

336

369

330

305

369

1,240

S41

1,360

3,150

4,780

2,100

-

Dec.

1,230

1,320

2,090

1,320

2,030

2,270

2,970

3,700

1,930

1,190

S90

713

601

516

451

411

369

39S

671

2,140

1,080

1,030

855

S90

960

995

1,030

1,320

2,010

1,150

341

Jan.

661

548

4SO

456

415

39S

420

394

438

554

565

543

649

649

673

1,110

2,450

4,4SO

1,730

1,110

S27

673

583

554

1,960

2,020

1,030

827

711

750

1,310

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 .....

Feb.

1,940

1,530

1,070

S20

692

601

637

560

500

510

625

543

470

415

377

346

327

312

2S4

274

264

254

24S

291

320

334

540

1,110

-

-

-

Secondfoot days

34,598

31,577

39,426

299,463

30,023

16,249

15,930

13,611

30,635

12,796

4,523

3,OSS

27,058

259,459

Mar.

1,110

1,370

320

589

526

516

490

460

420

377

346

323

305

2SS

274

264

271

471

724

505

407

645

510

402

373

390

460

4SO

510

635

619

Maximum

4,360

4,780

3,700

5,000

4,480

1,940

1,370

764

4,380

1,230

271

157

3,500

4,SSO

Apr.

595

764

595

505

614

637

475

424

475

548

490

433

386

369

565

4S5

415

373

342

327

342

354

377

369

390

394

402

377

369

415

May

39S

361

708

62S

960

1,150

661

543

442

393

456

873

661

757

560

3,160

4,SSO

2,290

1,450

1,540

1,150

925

S06

744

631

532

460

532

475

424

1,080

Minimum

120

305

369

rrq

394

248

264

327

361

242

92

74

291

74

June

792

565

465

407

373

377

510

442

39S

390

369

373

361

320

231

258

242

373

764

1,230

589

433

369

323

309

323

27S

264

295

323

Mean

1,116

1,053

1,272

818

968

580

514

454

9SS

427

146

97.7

902

711

July

271

245

229

217

202

191

191

132

169

156

149

144

140

135

131

12S

126

138

126

122

113

114

110

106

106

103

99

96

98

94

92

Per 

square 

mile

9.38

S.S5

10.7

o «o /

8* 13

4«87

4.32

S*3O

3.59

1 «23

 822 

7.53

5.97

Aug.

92

91

92

93

99

94

S9

36

85

31

81

S3

S3

S6

S3

SI

78

75

75

74

74

75

96

149

110

120

133

140

142

L16

157

Sept.

43S

291

1,000

1,730

686

433

390

298

443

1,350

369

925

1,430

3,500

2,080

1,560

1,320

1,030

925

925

667

526

442

381

334

524

607

442

415

547

Runoff

Inches

10.S1

9.37

12.32

93.53

9. 33

5.03

4 93

4!25

4.00

1 * 42

S.46

81.09

Acre-feet

63,620

62,630

78,200

594,000

59,550 

32 , 230

31,600

27, 000

60,760

25,380

S,9SO

6,010 

53,670

514,600
STILLAGUAMISH RIVER BASIN 59

South Fork of Stillaguamlsh River above Jim Creek, near Arlington, Wash.

Location.- Water-stage recorder, lat. 48°09'55", long. 122°03'55", in SWi sec. 17, T. 31 

N., R. 6 E., li miles upstream from Jim Creek and 3 miles southeast of Arlington. 

Datum of gage is 80 feet above mean sea level, datum of 1929.

Drainage area.- 199 square miles.

Records available.- October 1936 to September 1941.

Extremes.- Maximum discharge during year, 14,700 second-feet Oct. 10 (gage height, 19.56 

feet); minimum, 114 second-feet Aug. 20, 21 (gage height, 10.66 feet).

1936-41: Maximum discharge, 25,200 second-feet Apr. 17, 1938 (gage height, 23.27 

feet), from rating curve extended above 10,000 second-feet; minimum, 114 second-feet 

Sept. 26, 1940, Aug. 20, 21, 1941.

Remarks.- Records excellent. No diversion or regulation.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

10.S 

11.0 

11.3 

11.6

152

220

341

485

12.0

12.5

13.0

13.5

725

1,100

1,550

2,100

14.0

14.5

15.0

16.0

2,760 

3,570 

4.5QO 

6,450

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

272 

2S7 

213 

32S 

350

247 

19S 

174 

174 

5,970

5,190 

1,660 

1,450 

972 

705

562 

480 

1,940 

2,270 

2,780

4,020 

1,960 

1,320 

2,260 

1,700

1,130 

S96 

766 

1,000 

2,390 

4,150

Nov.

2,420 

2,040 

1,750 

1,320 

1,100

2,060 

2,100 

2,550 

1,860 

1,320

1,060 

881 

7SO 

760 

732

773 

852 

831 

725 

666

62S 

551 

512 

585 

1,730

1,360 

1,330 

3,950 

7,290 

3,260

Dec.

1,980 

2,040 

3,050 

2,040 

2,650

3,130 

4,240 

5,720 

3,100 

1,920

1,450 

1,130 

9SS 

859 

766

692 

634 

659 

956 

2,370

1,600 

1,450 

1,230 

1,270 

1,410

1,500 

1,550 

1,920 

3,290 

1,930 

1,410

Jan.

1,140 

949 

344 

S16 

753

766 

746 

705 

730 

996

988 941' 

1,060 

1,060 

1,100

1,600 

2,940 

6,030 

2,600 

1,700

1,320 

1,100 

941 

366 

2,230

3,100 

1,600 

1,270 

1,140 

1,100 

1,740

Month

Goto 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

Bay 

June 

July 

Augu 

Sept

Ha

mber ......................

lendar year 1940 .........

&ry

h .........................

ember .....................

ter year 1940-41 ..........

Peak discharge.- (

IB (3:su a.m.; a, 261

Feb.

2,550 

2,100 

1,500 

1,230 

1,060

926 

972 

874 

730 

SOI

1,020 

949 

301 

692 

616

568 

534 

507 

4SO 

465

444 

424 

420 

470 

517

539 

796 

1,650

Seoondfoot-days

48,364 

48,376 

59,584

454,236

45,021 

24,685 

23,815 

20,026 

44,034 

20,066 

6,891 

4,569 

39,172

384,603

Mar.

1,500 

2,040 

1,230 

938 

308

787 

730 

705 

647 

585

545 

512 

480 

454 

434

420 

424 

592 

1,020 

773

609 

94S 

323 

634 

580

603 

692 

699 

71S 

911 

374

Maximum

5,970 

7,290 

5,720

7,290

6,080 

2,550 

2,040 

1,060 

6,370 

2,030 

424 

228 

3,910

7,290

Apr.

830 

1,060 

831 

773 

890

1,060 

7SO 

666 

712 

330

746 

679 

585 

556 

308

732 

623 

556 

512 

496

507 

523 

545 

517 

534

539 

534 

507 

501 

539

May

534 

\496 

97S 

941 

1,360

1,550 

938 

BOS 

659 

591

659 

1,130 

964 

1,100 

S52

3,690 

6,370 

3,320 

2,220 

2,230

1,300 

1,410 

L.230 

1,140 

972

S23 

725 

352 

7S7 

635 

1,570

Minimum

174 

512 

634

114

705 

420 

420 

496 

496 

364 

141 

114 

454

114

June

1,320 

941 

773 

666 

609

597 

794 

712 

597 

591

545 

539 

517 

460 

420

386 

364 

486 

1,100 

2,030

1,060 

718 

597 

507 

470

507 

439 

400 

420 

501

Mean

1,560 

1,613 

1,922

1,241

1,452 

882 

76S 

668 

1,420 

669 

222 

147 

1,306

'1,054

July

424 

382 

360 

333 

312

295 

291 

279 

259 

243

236 

224 

216 

213 

206

193 

195 

19S 

134 

174

171 

16S 

162 

158 

158

152 

146 

141 

141 

141 

141

Per 

square 

mile

7.84 

3.11 

9.66

6.24

7.30 

4.43 

3.S6 

3.36 

7.14 

3.36 

1.12 

.739 

6.56

5.30

Aug.

133 

135 

13S 

144 

141

144 

135 

130 

127 

124

122 

130 

135 

130 

124

122 

122 

117 

119 

117

114 

119 

135 

228 

171

131 

213 

216 

216 

184 

19S

Sept.

767 

483 

1.290 

2,800 

1,090

672 

580 

454 

505 

2,630

1,450 

1,230 

2,310 

3,910 

2,680

2,000 

1,850 

1,550 

1,360 

1,450

1,060 

823 

679 

580 

512

317 

1,030 

705 

640 

760

Runoff

Inches

9.04 

9.04 

11.14

84.88

3.41 

4.61 

4.45 

3.74 

S.23 

3.75 

1.29 

.85 

7.32

71.87

Acre-feet

95,930 

95,950 

118,200

901,000

39,300 

48,960 

47,240 

39,720 

37,340 

39,800 

13,670 

9,060 

77,700

762,900

>ct. 10 (6:30 p.m.) 14,700 sec. -ft.; Nov. 29 (2:30-3 a.m.) 9,930 sec. -ft.; Jan. 

sec. -ft.; May 17 (11:30 a.m.) 8,160 sec. -ft.

461678 0-42-5
60 STILLAGUAMISH RIVER BASIN

Jim Creek near Arlington, Wash.

Location.- Water-stage recorder, lat. 48°10'30n , long. 122°03'55n , In SEiNWi sec. 17, T. 

31 N., R. 6 E., 1 mile upstream from mouth and 3 miles southeast of Arlington.

Drainage.- 48.9 square miles.

Records available.- October 1937 to September 1941.

Extremes.- Maximum discharge during year, 3,590 second-feet Nov. 29 (gage height, 7.08 

reet), from rating curve extended above 800 second-feet; minimum, 8.4 second-feet Aug. 

22 (gage height, 0.73 foot).

1937-41: Maximum discharge, 5,320 second-feet Dec. 28, 1937 (gage height, 8.32 

feet), from rating curve extended above 800 second-feet; minimum, 6.2 second-feet 

July 30, Sept. 3, 5, 1938; minimum gage height, 0.67 foot July 19, 1940.

Remarks . - Records excellent except those for period of no gage-height record, which are 

fair. No diversion or regulation.

Rating tables, water year 1940-41 (gage height. In feet, and discharge, In second-feet) 

(Shifting-control method used Dec. 12 to Jan. 15)

0.9 14

1.1 23

1.3 56

1.6 65

Oct. 1 to Jan. 15

2.0 123

2.5 182

2.6 256

3.0 570

3.5 540

4.0 750

4.5 1,050

5.0 1,400

0.9 14

1.1 26

1.3 38

1.6 62

Jan- 14 to Sept. 30

2.0 118

2.3 178

2.6 244

3.0 357

3.5 

4.0

545

810

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

Y

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

13

14

13

24

25

17

14

13

14

360

293

120

96

66

49

a40

a35

a 65

allO

a225

a325

a250

94

310

215

132

98

83

99

198

235

Nov.

218

225

191

151

123

269

326

498

467

300

222

174

149

139

128

125

134

136

116

111

109

98

91

113

182

139

237

409

1,600

627

-

Dec.

398

349

417

305

326

305

420

f914

f618

f331

272

215

182

159

141

128

120

120

160

364

218

189

167

189

218

248 275^

401

686

433

343

Jan.

275

228

194

182

165

161

157

153

163

178

163

153

172

176

192

232

486

655

397

286

230

196

174

160

304

390

265

220

194

184

211

Month

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

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

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

Calendar year 1940 .........

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

February

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

257

209

176

154

138

122

118

105

100

100

155

152

120

105

97

91

84

78

72

70

67

64

62

70

72

69

124

198

.

-

-

Secondfoct-days

3, 645

7,807

9, 613.

64,580.7

7

5*22Q

£ j 969

£ £27

4^ 674 

g 445 * «ww

406.7

2,726

47,766.7

Mar.

177

237

162

134

114

113

105

94

85

81

77

73

69

65

61

58

57

71

104

91

79

146

114

90

81

81

78

73

71

66

62

Maximum

360

1,600 

91^

1,600

655

ggrj

231

15£

732

272

44

20

222

1,600

Apr.

69

91

85

88

132

158

118

98

96

96

84

78

72

68

104

80

72

67

62

58

55

53

50

47

46

43

41

40

38

38

May

39

37

98

108

170

158

107

84

72

66

62

85

75

84

77

345

732

364

267

265

200

160

132

109

92

84

81

141

107

91

182

Minimum

13

91

120

p "X a**j

155

62

57

38

 z»7

O f

42

14

9*0

30

9.0

June

16S

134

109

92

81

83

98

81

71

65

5S

54

53

50

46

45

42

57

92

273

132

94

77

6S

64

58

51

49

48

50

Mean

118

260

310

176

£35

115

95 *8

74 £

151

81*4

23.6

13.1

90.9

131

July

44

41

38

35

33

31

29

28

27

25

26

24

24

22

21

20

20

20

20

20

20

18

18

18

18

16

16

16

16

15

14

Per 

square 

mile

E AT*tx 

5.5£

6. 34

5.60

4*81

2.35

1 .96

1. 52

3.09

1.66

. 482

.268

1.86

2.68

Aug.

14

14

16

16

14

13

12

12

11

11

11

12

12

11

11

10

10

9.9

9.6

9.6

9.6

9.0

12

18

14

16

20

20

18

13

18

Sept.

70

36

76

133

57

45

36

30

48

222

126

81

71

130

101

117

148

160

138

132

94

73

65

57

52

103

102

73

72

78

-

Runoff

Inches

2.77

5*94

7 ^1 ' °J40 -I n

-xo »j.ff

5.55

2.46

2 .26

1 AO t>y

3 .55

1.86

.56

.31

2.07

36.33

Ao re feet

7, 230

15,480

19,060

123,100

14, 470

6,400

5,890

4,420

9,270 

4,850

1,450

807

5,410

94,740

a No gage-height record; discharge computed on basis of records for South Pork of Stlllaguamlah 

River above Jim Creek, near Arlington, and South Fork of Stillaguamlah River near Granite Falls. 

f Computed on basis of partly estimated gage-height record.
STILLAGUAMISH RIVER BASIN 61

North Fork of Stillaguamish River near Arlington, Wash.

Location.- Water-stage recorder, lat. 48°15'45", long. 122°02'45n , in SEiNWi sec. 16, T. 

32 N., R. 6 E., 6 miles northeast of Arlington, 7 miles upstream from mouth, and 8 

miles downstream from Deer Creek. Altitude of gage, 90 feet (river-profile map).

Drainage area.- 869 square miles.

Records available.- July 1988 to September 1941.

Average discharge.- 13 years, 1,650 second-feet.

Extremes.- Maximum discharge during year, 9,760 second-feet Oct. 10 (gage height, 8.38 

reet), from rating curve extended above 7,000 second-feet; minimum, 183 second-feet 

Aug. 81, 88, 23 (gage height, 1.80 feet).

1928-41: Maximum discharge, 87,700 second-feet Feb. 86, 1938 (gage height, 18.7 

feet); minimum, 88 second-feet Sept. 23, 1938 (gage height, 1.14 feet).

Remarks.- Records good. No diversion or regulation.

Rating table, mater year 1940-41 (gage height, in feet, and discharge, in second-feet)

1.3 

1.5 

2.0 

2.5 

3.0

210

270

440

640

880

4.0 

5.0 

6.0 

7.0 

8.0

1,490

2,210

3,490

5,720

8,500

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

213

213

205

270

264

219

207

199

210

4,730

3,910

1,470

1,170

854

662

539

485

4,400

3,940

3,860

4,060

2,300

1,700

3,180

2,300

1,600

1,230

1,080

1,26O

2,140

2,300

Nov.

2,400

2,050

1,770

1,380

1,170

2,020

2,570

3,320

2,300

1,660

1,350

1,080

990

962

908

908

1,020

1,020

854

803

754

662

640

778

1,630

1,290

1,660

3,000

6,520

4,100

~

Dec.

2,510

2,210

3,500

2,510

3,930

3,670

4,310

6,250

3,860

2,510

1,910

1,630

1,350

1,200

1,080

962

908

935

1,170

3,210

1,910

1,700

1,490

1,740

1,910

2,050

2,050

2,510

3,960

2,510

1,980

Jan.

1,600

1,350

1,230

- 1,170

1,080

f 1,050

f990

962

1,110

1,320

1,320

1,290

1,520

' 1,420

1,380

1,480

3,310

6,860

3,490

2,400

1,910

1,600

1,380

1,260

2,670

3,060

a2,000

al,800

al, 600

al, 600

a£,200

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

May

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

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

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

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

Water year 1940-41 . ........

Feb.

a2,700

a2,400

1,980

1,660

1,490

1,320

1,350

1,200

1,110

1,050

1,350

1,290

1,050

935

S54

803

754

702

684

640

618

597

576

662

662

803

1,390

2,700

-

-

-

Secondfoot-days

51, 170

51,569

73,425

c^c 047

57,412

33, 330

30, 521

24,365

45,673 

21,179

10, 415

6,977 

40,351

446, 387

Mar.

2,220

2,610

1,700

1,380

1,170

1,140

1,080

990

880

803

754

730

684

640

618

597

597

730

1,020

908

803

1,200

990

803

730

754

SOS

778

778

S28

803

Maximum

4 730

6)520

6,250

6,860 

2 t 700

2,610

65 790

1,700 

515

339

3,320

6,860

Apr.

803

990

828

778

1,090

2,210

1,260

990

962

962

828

754

684

662

935

880

754

702

662

640

618

618

618

597

597

597

597

576

576

597

-

May

597

555

922

880

1,490

1,560

1,140

880

730

662

702

1,050

908

803

730

2,990

6,790

3,880

2,510

2,510

1,910

1,560

1,380

1,260

1,110

962

990

1,110

962

880

1,260

Minimum

199

640

9Ofl

194

962

576

5V6

555

458

236

191

440

191

June

1,140

908

778

702

662

684

828

77S

640

597

597

597

597

531

500

470

458

618

962

1,700

1,020

778

662

597

.597

618

535

496

511

618

-

Moan

1,651

1,719 

2y 369

1 464

1,852

1,190

985

812

1 4V3

336

225

1,345

1.223

July

515

47V

451

429

415

404

404

386

366

345

335

332

322

322

322

318

315

372

322

.305

302

289

273

296

299

270

258

251

245

239

236

Per

square 

mile

6. '14

6 .39

S QT

5.44

6 * 88

4.42

3 . 66

5 . 48

2 62

1.25

.836

5.00

4.55

Aug.

230

£

£

i

J54

61

33

224

222

£

£

£_

22

19

16

210

207

£

£

£

13

16

07

205

202

]

]

]

.99

94

L91

191

191

]

£

£

L94

16

54

216

239

£

£

£

£

73

61

48

30

339

Sept.

1,510

662

1,480

2,600

1,010

662

531

440

470

2,150

1,600

1,290

2,030

3; 320

2,160

2,180

2,050

1,910

1,840

1,560

1,230

990

828

702

640

932

962

730

702

1,180

Bunoff

laches

7.07

7 «13

10.15

74.10

7.94

4.61

4.22

3 «37

6.31 2 93

1. 44 

 96

5.58

61.71

Acre-feet

101,500

102,300

145,600

1,063,000

113,900

66, 110

60,540

48,330

90,590

42,010

20,660

13,840 

80,040

885.400

a No gage-height record; discharge computed on basis of records for station on South Pork above 

Jim Creek.

f Computed on basis of partly estimated gage-height record.
62 SKAGIT RIVER BASIN

Skagit River near Hope, British Columbia 

(International gaging station)

Location.- Water-stage recorder, lat. 49°03', long. 121°05', Just downstream from Galena 

Creek, 4 miles upstream from the international boundary, and 40 miles southeast of Hope, 

British Columbia.

Drainage area.- 370 square miles.

Records available.- October 1934 to September 1941 in water-supply papers of Geological 

Survey.March 1915 to September 1922 in bulletins of Dominion Water & Power Bureau, 

Canada.

Extremes.- Maximum discharge during year, 1,560 second-feet May 2 (gage height, 5.15 feet); 

minimum, 122 second-feet Oct. 9 (gage height, 2.27 feet).

1915-22, 1934-41: Maximum discharge', 7,560 second-feet June 17, 1916; minimum 

recorded, 81 second-feet Feb. 9, 1937.

Remarks.- Records good. No diversion or regulation.

Cooperation.- This station is maintained with the cooperation of the city of Seattle and 

Is one or the 'international gaging stations maintained by Canada under agreement with 

the United States.

Rating table, water year 1940-41 (gage height, In feet, and discharge, 

In second-feet)

2.4 151

2.6 203

2.8 268

3.0 

3.3 

3.6

346

476

617

4.0 

4.6 

6.0

818

1,100

1,440

Discharge, In second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

S

6

7 

8 

9 

10

11 

12 

13 

14 

16

16 

17 

18 

19 

20

21 

22 

23 

24 

26

26 

27 

28 

29 

30 

31

Oct.

174 

168 

151 

142 

137

133 

130 

126 

124 

241

333 

234 

234 

212 

200

164 

179 

370 

627 

898

980 

770 

622 

622 

617

536 

476 

430 

408 

391 

383

Hov.

362 

345 

329 

309 

294

290 

301 

321 

290 

241

234 

209 

216 

231 

226

226 

225 

218 

212 

209

206 

192 

196 

200 

196

192 

196 

203 

215 

215

Dec.

212 

21S 

264 

290 

313

362 

383 

566 

685 

603

622 

467 

430 

404 

379

358 

333 

333 

329 

341

329 

362 

362 

345 

329

321 

313 

305 

305 

301 

286

Jan.

272 

248 

248 

261 

241

231 

228 

225 

225 

241

248 

261 

261 

272 

272

272 

286 

444 

470 

444

413 

396 

400 

374 

366

346 

329 

329 

333 

333 

374

Month

Oet 

Nov 

Dec

C

Jan 

Peb 

Mar 

Apr 

May 

Jun 

Jul 

Aug 

Sep

W

ember. ....................

ater year 1940-4

Peb.

417 

439 

430 

421

417

408 

408 

400 

396

387

383 

374 

368 

337 

329

321 

313 

301 

298 

294

286 

279 

264 

265 

265

258 

261 

294

Seeondfoot-days

11,231 

7,296 

11,319

222.397

9,622 

9,693 

13,373 

28,326 

33,383 

25,589 

12,034 

6,275 

10,010

178, 050

Mar.

317 

337 

341 

333 

333

329 

333 

346 

363 

353

363 

358 

362 

366 

370

387 

417 

439 

444 

434

426 

421 

417 

408

417

462 

560 

622 

700 

781 

856

Maximum

980 

362 

685

2,790

470 

439 

856 

1,340 

1,500 

1,130 

556 

241 

550

1,600

Apr.

898 

1,020 

1,060 

992 

936

893 

860 

S39 

866 

920

903 

893 

871 

866 

909

871 

834 

792 

770 

770

807 

866 

947 

992 

1,030

1,080 

1,140 

1,160 

1,200 

1,340

May

1,600 

1,480 

1,360 

1,210 

1,110

1,010 

947 

887 

839 

802

834 

1,160 

1>370 

1,220 

1,110

1,060 

1,100 

1,080 

992

947

936 

947 

998 

1,140 

1,180

1,110 

1,040 

1,020 

1,020 

964 

1,030

Minimum

124 

192 

212

124

226 

254 

317 

770 

802 

579 

264 

171 

181

124

June

1,100 

1,020 

964 

925 

969

986 

1,100 

1,130 

1,020 

969

986 

1,020 

1,030 

964 

936

882 

839 

797 

781 

755

720 

705 

705 

675 

641

617 

598 

683 

593 

579

Mean

362 

243 

365

608

310 

343 

431 

944 

1,080 

853 

388 

202 

334

488

July

656 

631 

522 

503 

484

466 

470 

448 

421 

404

387 

374 

374 

374 

383

391 

400 

400 

391 

366

346 

309 

294 

362 

366

321 

306 

290 

279 

266 

254

Per 

square 

mile

0.98 

.66 

.99

1.64

.84 

.93 

1.16 

2.66 

2.92 

2.31 

1.05 

.66 

.90

1.32

Aug.

241 

231 

225 

226 

218

212 

212 

216 

216 

212

209 

226 

212 

206 

206

203 

196 

192 

190 

187

187 

187 

190 

184 

171

171 

203 

209 

192 

176 

174

Sept.

192 

192 

209 

234 

209

200 

198 

181 

181 

248

248 

248 

294 

426 

466

462 

560 

498 

466 

476

448 

417 

400 

387 

370

383 

374 

362 

349 

353

Runoff

Inches

1.13

.74 

1.14

22.34

.97 

.97 

1.34 

2.84 

3.37 

2.58 

1.21 

.63 

1.00

17.92

Acre-feet

22,280 

14,470 

22, 450

440,800

19,080 

19,030 

26,520 

56,180 

66,210 

50,760 

23,870 

12,460 

19,860

353, 200
SKAGIT RIVER BASIN 63

Skagit River above Devils Creek, near Newhalem, Wash.

Location.- Water-stage recorder, lat. 48°51', long. 121°02', in NWi sec. 30, T. 39 N., R. 

14 E., 2 miles upstream from Devils Creek, 10i miles upstream from Ross Dam, and 15 

miles northeast of Newhalem.

Drainage area.- 638 square miles.

Records available.- March 1940 to September 1941.

Extremes.- Maximum discharge during year, 4,210 second-feet Oct. 21 (gage height, 4.58 

feet)J minimum, 359 second-feet Oct. 8 (gage height, 0.68 foot).

1940-41: Maximum discharge, 5,900 second-feet May 24, 1940 (gage height, 5.55 feet); 

minimum, that of Oct. 8, 1940.

Remarks.- Records good. No diversion or regulation.

Cooperation.- Gage-height record collected in cooperation with and sixteen discharge 

measurements furnished by city of Seattle.

Rating table, water year 1940-41 (gage height, In feet, and discharge, 

In second-feet)

0.8 395 1.7 810 3.5 2,690 

1.0 470 2.0 1,040 4.0 3,360 

1.2 555 2.5 1,520 4.5 4,060 

1.4 645 5.0 2,080

Discharge, in second- feet, water year October 1940 to September

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

81 

82 

83 

84

85

86 

87 

88 

89 

30 

31

Oct.

498 

462 

430 

409 

389

380 

368 

365 

362 

719

944 

655 

660 

596 

604

532 

527 

1,630 

2,650 

3,640

3,430 

2,380 

1,850 

1,900 

1,740

1,520 

1,320 

1,180 

1,080 

1,040 

992

Nov.

960 

92S 

880 

838 

804

786 

804 

852 

810 

750

717 

670 

650 

640 

636

632 

627 

618 

600 

596

582 

560 

546 

542 

528

519 

519 

537 

568 

586

Dec.

562 

591 

680 

774 

880

1,040 

1,040 

1,320 

1,5SO 

1,470

1,320 

1,180 

1,080 

1,020 

960

896 

845 

824 

810 

880

852 

896 

912 

888 

873

838 

824 

817 

817 

804 

780

Jan.

744 

706 

670 

655 

627

614 

596 

5S2 

600 

614

650 

67S 

706 

728 

722

728 

756 

1-.02C 

1,130 

1,130

1,040 

1,020 

976 

944 

936

886 

85£ 

831 

838 

852 

852

Feb.

1,08C 

1,22C 

1,18C 

1,13C 

1,13C

1,08C 

1,04C 

1,02C 

1,OOC 

9B£

95J 

93C 

89E 

87J 

83£

81C 

79J 

78C 

756 

744

73E 

72E 

706 

70C 

69E

69C 

69 E 

76£

Month Second- 

*onth foot-days

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apr! 

May 

June 

July 

Augu 

Sept

ffa

lendar year

35,252 

20,285 

29,073

..

ember .....................

24,682 

24,940 

31,217 

59,940 

69,990 

57,290 

30,260 

17,562 

21,839

ter year 1940-41 .......... 422,330

liar.

804 

866 

873 

866 

852

838 

S31 

852 

866 

872

88C 

880 

880 

888 

896

920 

984 

1,030 

1,040 

1,020

992 

976 

960 

936 

944

1,020 

1,180 

1,320 

1,470 

1,680 

1,800

Maximum

3,640 

960 

1,580

-

1,130 

1,220 

1,800 

2,950 

3,220 

2,620 

1,270 

695 

1,080

3,640

Apr.

1,900 

2,260 

2,320 

2,140 

2,020

1,900 

1,800 

1,740 

1,800 

1,900

1,900 

1,850 

1,800 

1,800 

1,850

1,800 

1,680 

1,580 

1,520 

1,520

1,630 

1,800 

2,020 

2,140 

2,260

2,380 

2,500 

2,560 

2,620 

2,950

May

3,220 

3,150 

2,880 

2,560 

2,260

2,080 

1,850 

1,740 

1,580 

1,520

1,630 

2,500 

2,950 

2,560 

2,320

2,200 

2,380 

2,260 

2,020 

1,850

1,800 

1,850 

2,080 

2,560 

2,690

2,440 

2,380 

2,200 

2,140 

2,020 

2,320

Minimum

362 

519 

582

-

582 

690 

804 

1,520 

1,520 

1,270 

655 

478 

478

362

June

2,500 

2,380 

2,140 

2,080 

2,200

2,260 

2,440 

2,380 

2,140 

2,080

2,320 

2,560 

2,620 

2,320 

2,140

1,960 

1,800 

1,800 

1,630 

1,580

1,470 

1,520 

1,580 

1,470 

1,370

1,270 

1,270 

1,320 

1,370 

1,320

llean

1,137 

676 

938

-

796 

891 

1,007 

1,998 

2,258 

1,910 

976 

567 

728

1,157

1941

July

1,270 

1,270 

1,220 

1,1SO 

1,130

1,130 

1,180 

1,130 

1,040 

984

968 

968 

976 

1,000 

1,030

1,080 

1,130 

1,130 

1,080 

1,000

944 

831 

750 

739 

762

768 

768 

750 

712 

685 

655

Per 

square 

mile

1.78 

1.06 

1.47

-

1.25 

1.40 

1.58 

3.13 

3.54 

2.99 

1.53 

.889 

1.14

1.81

Aug.

609 

578 

573 

578 

560

555 

564 

582 

600 

600

600 

695 

632 

S04 

600

596 

573 

564 

550 

550

564 

564 

573 

528 

486

478 

550 

528 

510 

478 

540

Sept.

604 

560

655 

750 

604

560 

528 

486 

478 

669

614 

568 

655 

873 

866

936 

1,080 

968 

888 

880

838 

780 

768 

762 

739

a890 

a800 

a700 

a660 

a690

Runoff

Inches

2.05 

1.18 

1.69

-

1.44 

1.45 

1.82 

3.49 

4.08 

3.34 

1.76 

1.02 

1.27

24.59

Acre-feet

69,920 

40,230 

57, 670

-

48,960 

49, 470 

61,920 

118,900 

138,800 

113,600 

60,020 

34,830 

43,320

837,600

a Ho gage-height record; discharge computed on basia of records for Ruby Creek near Hewhalam.
64 SKAGIT RIVER BASIN 

Skagit River at Newhalem, Wash.

Location.-- 'Water-stage recorder, lat. 48 040', long. 121°15', In SEi sec. 21, T. 37 N.,

R. 12 E., at power plant of city of Seattle at Newhalem, a quarter of a mile upstream

from Newhalem Creek, 11 miles upstream from Bacon Creek, and 16 miles upstream from

Marblemount. Datum of gage is 400 feet above mean sea level, subject to correction

to datum of 1929.

Drainage area.- 1,160 square miles, of which 390 square miles Is In Canada. 

Records available.- December 1908 to May 1914 and October 1920 to September 1941 In reports or Geological Survey. October 1908 to September 1933 (monthly discharge only)

In State Water-Supply Bulletin 5. 

Average discharge.- 33 years, 4,320 second-feet, adjusted for storage In Dlablo Reservoir

since October 1929 and Ruby Reservoir since March 1940. 

Extremes.- Maximum discharge during year, 17,100 second-feet Oct. 20 (gage height, S8.12

reet); minimum, 138 second-feet Mar. 16 (gage height, 78.71 feet); minimum dally,

1,180 second-feet Jan. 12.

1908-14, 1920-41: Maximum discharge, 60,000 second-feet Dec. 12, 1921 (gage height,

94.2 feet); minimum, 74 second-feet (regulated) Nov. 10, 1936 (gage height, 78.39 feet);

minimum dally, 136 second-feet (regulated) Aug. 24, 1930 

Remarks.- Records excellent. Water Is diverted 3 miles upstream (may be entire low-water

now) and Is returned to river at Seattle power plant Just above station. Flow partly

regulated by Dlablo and Ruby Reservoirs (see p. 67 ), having a combined capacity of

179,100 acre-feet. 

Cooperation.- Gage-height record collected In cooperation with and many discharge

measurements furnished by city of Seattle.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

Sl.O 1,330 BE. 5 2,930 85.0 7,150 

81.5 1,790 83.0 3,62O 86.0 9,820 

S2.0 2,330 S4.0 5,200 87. 0 12,900

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

Z

a

4 

5

6

7 

S 

9

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

2,190 

2,250 

2,220 

2,120 

1,850

tl,490 

1,660 

1,530 

2,100 

3,760

2,340 

1,500 

tl, 330 

1,630 

1,610

1.560 

1,940 

4,780 

7,580 

+13,500

11,300 

7,200 

4,900 

5,770 

5,080

3,880 

f3,040 

4,050 

2,510 

3,630 

2,470

Nov.

2,070 

1,830 

tl,650 

2,160 

1,930

2,070 

2,060 

2,530 

1,940 

fl, 700

1,830 

1,890 

1,970 

2,120 

2,060

1,810 

tl, 470 

2,110 

2,150 

2,230

1,660 

2,110 

2,010 

tl,350 

2,140

2,210 

2,230 

2,050 

2,160 

1,670

Month

Oct 

Nor 

Dec

Ca

JanFeb" 

Map 

Apr 

May 

«Tun 

Jul 

Aug 

Sep

Wa

lendar year 1940

ter year 1940-41

Dec.

tl,290 

1,800 

1,930 

1,710 

1,660

1,820 

1,730 

t3,090 

3,890 

3,850

3,370 

2,870 

2,590 

2,470 

+2,150

2,160 

2,170 

2,130 

2,180 

2,250

2,030 

tl,560 

1,890 

2,280 

2,030

2,060 

1,960 

1,850 

t2,010 

2,080 

1,820

Jan.

1,410 

1,720 

1,750 

1,570 

+1,440

1,730 

1,790 

1,660 

1,580 

1,620

1,430 

fl.lSO 

1,620 

1,710 

1,710

1,700 

2,000 

2,250 

t2,890 

2,830

2,380 

2,230 

2,060 

2,010 

2,020

t2,lOO 

2,100 

1,810 

1,770 

1,850 

2,040

Feb.

2,840 

t2,620 

2,590 

2,560 

2,250

2,250 

1,980 

2,110 

t2,130 

1,790

1,770 

1,770 

1,780 

1,730 

1,510

tl,540 

1,680 

1,680 

1,670 

1,680

1,680 

1,360 

fl,540 

1,580 

1,570

1,570 

1,620 

1,700

Mar.

1,660 

tl, 470 

1,720 

1,600 

1,570

1,600 

1,660 

1,510 

tl,290 

1,S80

1,900 

1,820 

1,870 

1,960 

1,720

tl,820 

3,400 

3,570 

3,310 

3,320

3,420 

2,950 

t2,120 

3,280 

3,360

3,400 

3,460 

3,460 

3,050 

t2,460 

3,290

Observed

Discharge in 

second-feet

Maximum

13,500 

2,330 

3,890

13,500

2,890 

2,840 

3,570 

6,580 

7,450 

7,030 

6,410 

2,740 

2,960

13,500

MinlnnxB

1,33O 

1,350 

1,290

1,280

1,180 

1,360 

1,290 

2,290 

3,110 

2,530 

1,590 

1,560 

2,080

1,180

Mean

3,638 

1,966 

2,222

3,306

1,870 

1,877 

2,416 

3,815 

5,021 

4,858 

3,158 

2,519 

2,605

3,003

Runoff 

in 

acre-feet

223,700 

117,000 

136, 600

2,400,000

115, 000 

104,200 

148,600 

227,000 

308,700 

289,100 

194,200 

154,900 

155,000

2,174,000

Apr.

3,440 

3,170 

2,990 

2,970 

2,690

t2,290 

2,960 

3,460 

3,950 

3,740

3,760 

3,780 

t2,900 

3,040 

3,190

3,05O 

3,620 

3,380 

3,040 

t2,890

3,700 

3,790 

4,420 

4,970 

4,900

5,110 

t5,350 

5,760 

5,560 

6,580

May

7,190 

7,030 

5,S60 

t5,210 

4,510

3,960 

4,130 

3,470 

3,170 

3,110

t3,400 

6,190 

7,450 

5,690 

4,980

4,980 

5,220 

t5,220 

4,590 

3,740

3,870 

4,080 

4,840 

6,450 

t6, 590

5,940 

5,490 

4,760 

4,590 

4,480 

5,450

Change in

Ruby and 

Diablo 

Reservoirs 

(acre-feet)

+17,020 

-14, 920 

+16, 730

+105,500

+690 

-5,060 

-18, 970 

+26, 360 

-1,120 

-7,010 

+10, 950 

-14, 850 

-10,280

-460

June

+5,790 

5,650 

4,9SO 

4,790 

5,370

5,580 

5,660 

+5,480 

4,840 

4,370

6,170 

6,860 

7,030 

6,730 

t6,000

5,080 

4,270 

4,660 

4,220 

3,800

3,440 

t3,780 

5,090 

4,620 

5,040

4,610 

3,360 

2,920 

+2,530 

3,030

July

4,070 

4,050 

aS,050 

al,590 

a2,930

+a3,860 

a6, 410 

a5,120 

a4, 870 

3,190

2,670 

2,420 

+2,380 

2,460 

2,460

2,270 

2,770 

4,200 

4,680 

t3,800

3,610 

2,250 

2,520 

2,270 

2,320

2,370 

t3,100 

2,480 

2,420 

2,640 

2,670

Aug.

2,650 

2,250 

+1,560 

2,260 

2,220

2,190 

' 2,210 

2,280 

2,500 

+2,260

2,500 

2,630 

2,580 

2,640 

2,660

2,670 

+2,530 

2,660 

2,720 

2,740

2,690 

2,690 

2,740 

+2,580 

2,690

2,590 

2,720 

2,710 

2,670 

2,740 

+2,540

Sept.

2,140 

2,370 

2,840 

2,940 

2.S70

2,480 

+2,100 

2,550 

2,600 

2,650

2,410 

2,610 

2,900 

+2,490 

2,700

2,960 

2,850 

2,720 

2,640 

2,340

+2,080 

2,570 

2,750 

2,720 

2,700

2,760 

2,460 

+2,430 

2,680 

2,830

Adjusted for change 

in reservoir contents

Runoff 

in 

acre feet

240,700 

102,100 

153,300

2,505,000

115,700 

99,100 

129,600 

253, 400 

307,600 

282,100 

205,200 

140,000 

144,700

2,174,000

Discharge in 

second-feet

Per 

Mean square 

mile

3,915 3.3£ 

1,716 1.4 

2,493 2.1£

3,451 2.96

1,882 1.62 

1,784 1.54 

2,108 1.8£ 

4,259 3.67 

5,003 4.33 

4,741 4.09 

3,537 2.8E 

2,277 1.96 

2,432 2. 1C

3,002 2.59

BOB*

la 

inches

3.90 

1.65 

2.48

40.49

1.87 

1.60 

2.10 

4.10 

4.97 

4.56 

3.32 

2.26

.... e-34

35.15

t Sunday.

a No gage-height record; discharge computed on basis of records for station at Perry Bar, furnished 

by city of Seattle.

Note.- Change in contents based on midnight elevations.
SKAGIT RIVER BASIN 65

Skagit River near Concrete, Wash.

Location.- Water-stage recorder, lat. 48°32', long. 121°46', in sec. 16, T 35 N., R. 8 

E., at dalles 2 miles downstream from Baker River and 24 miles southwest of Concrete. 

Datum of gage is 130.0 feet above mean sea level, datum of 1929.

Drainage area.- 2,700 square miles, of which 390 square miles is in Canada. 

Records available.- September 1924 to September 1941.

Average discharge.- 17 years, 14,080 second-feet (adjusted for storage in Lake Shannon 

Reservoir since October 1925, Diablo Reservoir since October 1929, and Ruby Reservoir 

since March 1940).

Extremes.- Maximum discharge during year, 51,000 second-feet Oct. 19 (gage height, 26.20

 feet); minimum, 3,540 second-feet (regulated) Oct. 6 (gage height, 13.51 feet); minimum daily, 4,120 second-feet (regulated) Oct. 6.

1924-41: Maximum discharge, 147,000 second-feet Feb. 27, 1932 (gage height, 40.0 

feet, present datum); minimum, probably less than 2,160 second-feet during Oct. 1-24, 

1925, when recorder was not operating and gates in Baker River Dam were first closed; 

minimum daily recorded, 2,610 second-feet (regulated) Nov. 14, 1936.

Maximum stage known, 69.3 feet, present datum, from floodmarks (discharge, about 

500,000 second-feet), occurred about 1815. Records of other floods prior to establishment of station are given in Water-Supply Paper 612.

Remarks.- Records excellent except those for period of no gage-height record, which are

 fair. All diversions returned to river above gage. Flow partly regulated by power 

plants on Baker and upper Skagit Rivers, and by Ruby, Diablo, and Lake Shannon Reservoirs (see p. 67 ). Records of daily discharge not adjusted for change in contents 

of reservoirs.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

e

3

4 

6

6

7 

8 

9 

10

11ie

13 

14 

16

16

17 

18 

19 

20

21 

22 

23 

24 

26

26 

27 

28 

29 

50 

31

Oot.

6,620 

5,480 

5,100 

4,930 

4,620

t4,120 

4,260 

4,370 

4,220 

13,800

18,500 

9,4«0 

t8,580 

7,540 

7,050

6,540 

6,710 

35,700 

39,300 

t42,200

40,000 

24,100 

17,100 

21,900 

17, 600

13,700 

tlO,500 

10,100 

9,390 

11,300 

12,700

Nov.

11,000 

9,620 

t9,340 

8,460 

8,360

8,460 

9,420 

11,200 

9,460 

t8,400

,720 

,560 

,250 

,440 

,440

7,120 

t6,900 

6,980 

6,600 

6,400

5,820 

5,720 

5,780 

t6,200 

6,740

7,140 

7,650 

9,330 

16,700 

13,000

Month

Oct 

Nor

Dec

Ca.

Jam 

Fab 

Han 

Apr 

May 

Jun 

Jul 

Augi 

Sap

Wa

amber... ........

Lendar year 1940

bar year 1940-41

Dec.

+10,100

11,400 

14,200 

13,400 

15,900

16,700 

16,900 

t21,800 

19,500 

14,800

13,000 

11,600 

10,400 

9,760 

t8,650

8,540 

8,450 

8,280 

8,380 

11,800

10,100 

+10,300 

9,580 

10,700 

9,450

10,000 

9,440 

9,180 

tlO,400 

10,100 

8,840

Jan.

8,110 

7,680 

7,620 

7,590 

t6,840

6,920 

6,760 

6,420 

6,400 

6,920

6,800 

t6,280 

7,100 

7,380 

7,220

7,520 

9,020 

21,300 

t!5,700 

12,700

10 , 600 

10,000 

9,120 

8,670 

10,000

+10,1*00 

9,460 

8,670 

8,260 

8,080 

10,100

Feb.

14,300 

t!2,700 

10,400 

10,000 

9,510

9,190 

8,640 

8,200 

tV , 900 

7,740

7,800 

7,600 

7,220 

7,040 

6,620

te.ioo

6,510 

6,580 

6,440 

6,400

6,450 

6,120 

t5,810 

6,260 

6,300

6,450 

6,840 

9,220

Mar.

9,280 

t9,460 

8,740 

8,180

7,710

7,400 

7,330 

7,340 

6,560 

t6,920

7,160 

7,080. 

6,940 

6,990 

6,960

t6,420 

7,740 

8,680 

9,040 

8,560

8,360 

8,400 

t7,200 

7,380 

8,100

8,490 

9,020 

9,550 

9,740 

t9,540 

10,300

Observed

Discharge in 

second-feet

Mailmum

42,200 

16,700 

21, 800

42,200

21,300 

14,300 

10,300 

16,400 

25,200 

21,100 

13,900 

7,800 

20,100

42,200

Mini4,120 

5,720 

8,280

4,120

6,280 

5,810 

6,420 

8,590 

9,340 

10,100 

6,300 

5,300 

6,330

4,120

Mean

13,790 

8,307 

11,670

12,140

8,882 

7,869 

8,083 

10,810 

15,300 

14,330 

9,337 

6,403 

10,480

10,450

Runpff 

in 

acre-feet

848, OOC 

494, 30C 

717, 30C

8, 810, OOC

546,10C 

437, OOC 

497, OOC 

643, 30C 

941.10.C 

852, 90C 

574, 10C 

393, 70C 

623, 70C

7, 568, OOC

Apr.

10,700 

12,200 

11,000 

9,880 

9,540

t9,360 

9,150 

9,340 

10,200 

10,600

10,100 

10,100 

t8,900 

8,590 

9,930

9,760 

9,570 

9,560 

8,900 

t8,700

9,660 

10,700 

11,700 

12,300 

13,000

13,400 

t!3,300 

13,800 

14,000 

16,400

May

17,300 

16,600 

15,200 

+13,000 

12,500

11,500 

11,200 

10,400 

9,340 

9,510

tlO,500 

18,000 

19,200 

15,800 

13,700

15,100 

25,200 

t20,500 

16,500 

14,600

14,200 

14,400 

17,000 

21,000 

+20,200

18,000 

16,500 

14,300 

13,400 

12,600 

17,200

Change In 

contents 

(aere-feetjf

+27,760 

-17,380 

+17,150

+103,900

+2,860 

-18,920 

-20,030 

+26,510 

+15,000 

-7,010 

+9,490 

-14,110 

-11,220

+10,100

June

t!7 , 600 

16,800 

14,200 

13,700 

14,400

16,800 

18,900 

t!5,600 

13,900 

12,500

15,900 

21,100 

20,400 

17,600 tie, ooo

14,500 

12,600 

13,500 

14,500 

13,000

11,600 

til, 900 

13,900 

12,900 

12,400

12,400 

10,800 

10,100 tio.ioo

10,400

July

11,400 

11,600 

11,500 

9,390 

9,430

no, 200

13,900 

13,300 

11,800 

10,000

9,140 

8,560 

+7,840 

8,880 

9,530

9,680 

9,860 

11,300 

11,900 

til, 100

9,180 

8,720 

7,220 

6,820 

6,500

a6,800 

ta7,700 

a6,BOO 

a6,300 

a6, 500 

a6,600

Aug.

a6,400 

a6,000 

ta5,300 

a5,900 

5,860

5,740 

5,860 

6,180 

6,480 

+6,290

6,420 

7,800 

7,000 

6,680 

6,690

6,590 

+6,410 

6,920 

6,880 

6,740

6,880 

6,570 

6,940 

t6,600 

5,960

6,340 

6,680 

6,270 

5,980 

5,670 

+6,460

Adjusted for 

in reservoir

Runoff 

in 

acre-feet

875,800 

476,900 

734,400

8,914,000

549,000 

418,100 

477,000 

669,800 

956,100 

845,900 

583 , 600 

379,600 

612,500

7,579,000

Sept.

9,050 

7,920 

9,660 

13,400 

9,650

8,480 

t7,200 

6,330 

7,000 

12,400

10,600 

9,560 

13,900 

t20,100 

16,600

16,100 

16,800 

13,100 

11,600 

10,700

t9,470 

8,600 

8,680 

8,500 

8,110

8,920 

8,700 

+7,330 

7,440 

8,540

change 

contents

Discharge in 

second-feet

Mean

'14,240 

8,015 

11,940

12,280

8,929 

7,528 

7,758 

11,260 

15,550 

14,220 

9,491 

6,174 

10,290

10,470

Per 

square 

mile

5.27 

2.97 

4.42

4.55

3.31 

2.79 

2.87 

4.17 

5.76 

5.27 

3.52 

2.29 

3.81

3.88

Runin 

inches

6.08 

3.31 

5.10

61.89

3.82 

2.90 

3.31 

4.65 

6.64 

5.88 

4.06 

2.64 

4.25

52.64

t Sunday.

t Change in contents in Ruby, Diablo, and Lake Shannon Reservoirs.

a No gage-height record; discharge computed on basis of records for Skagit River at Newhalem, Sauk 

River near Sauk.and unpublished records for Baker River at Concrete.
66 SKAGIT RIVER BASIN

Skaglt River near Mount Vernon, Wash.

Location.- Water-stage recorder, lat. 48°25'40", long. 122°20'00", In SEi sec. 7, T. 34 N., 

R. 3 E., on drawrest of, and 150 feet downstream from bridge on U. 3. Highway No. 99 and 

about 1 mile north of Mount Vernon. Datum of gage Is mean sea level, datum of 1929. 

Auxiliary water-stage recorder, lat. 48°25'20", long. 122°20'10", in NEi sec. 19, T. 34 

N., R. 4 E., on left bank, 250 feet upstream from highway bridge and In rear of Carnation Creamery plant In Mount Vernon. Datum of gage Is mean sea level, datum of 1929.

Drainage area.- 3,060 square miles.

Records available.- November 1940 to September 1941.

Extremes.- Maximum discharge during period, 28,100 second-feet May 17 (elevation, 17.70 

feet); minimum, 4,560 second-feet (regulated) Aug. 4 (elevation, 8.30 feet).

Maximum stage known, 37 feet at base gage and 29 feet at auxiliary gage In 1906, 

from Great Northern Ry. high-water profile.

Remarks.- Records good except those for period of no gage-height record, which are fair. 

The city of Anacortes diverts a comparatively insignificant amount at Avalon, between 

gages, for municipal water supply. Flow partly regulated by power plants on Baker and 

upper Skaglt Rivers, and by Ruby, Dlablo and Lake Shannon Reservoirs.

ating table, November 1940 to September 1941 (gage height, In feet, and discharge, in seoond-feet) 

(Shifting-control method used Nov. 21 to Jan. 4, Sept. 17-30)

8.5 

9.0

5,000

6,100

10.0

11.0

S,350 

10,600

12.0

13.0

13,000

15,400

15.0

17.0

20,500

26,000

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct. Nov.

a!3,000

all, 000

all, 000

alO.OOO

a9,900

alO.OOO

all, 000

a!2,000

a!3,000

all, 000

a9,600

a8,900

a8,500

a8,600

a8,600

a8,300

aS.OOO

a8,100

a7,800

a7,600

7,430

6,540

6,760

7,200

8,120

8,810

9,040

11,300

16,900

18,400

-

Dec.

14,000

13,700

15,200

17,700

17,200

21,600

19,000

24,300

25,200

19,200

16,900

14,500

13,000

12,100

10,900

10,200

9,960

9,960

9,960

13,300

13,300

12,500

11,300

12,300

12,500

11,800

11,600

11,300

13,300

13,700

11,600

Jan.

10,200

9,040

8,810

8,810

8,120

7,430

7,430

6,980

6,980

7,430

7,660

7,200

7,430

8,350

8,350

8,810

10,200

22,100

21,600

15,400

13,500

11,600

10,600

9,960

11,100

13,300

11,300

10,400

9,730

9,270

10,400

Feb.

15,700

15,900

12,800

11,600

11,100

10,200

9,730

9,270

8,810

8,580

8,810

8,580

8,120

7,660

7,200

6,540

6,540

6,760

6,540

6,540

6,320

6,320

5,660

6,100

6,540

6,760

7,430

10,200

_

-

-

Month

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

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

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

Calendar year ......................

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

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

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

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

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

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

July

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

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

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

Mar.

11,100

11,600

10,200

9,270

8,580

8,120

7,890

7,890

7,200

6,760

7,430

7,430

7,200

6,980

7,200

6,760

6,760

8,580

9,500

9,040

8,580

9,270

8,350

6,980

8,120

8,350

9,040

9,500

9,730

9,960

9,730

Apr.

10,600

12,100

11,800

10,400

10,200

11,100

9,960

9,960

10,200

11,100

10,900

10,400

9,960

8,810

10,200

10,600

9,730

9,960

9,270

9,040

9,270

10,600

11,300

12,300

13,000

13,300

13,700

13,300

14,000

15,400

-

Secondfoot-days

_

296,400

443,080

_

319,490

242,310

263,100

332,460

492,160

449,100

304,420

199,680

343,580

-

May

16,700

16,900

16,200

14,200

14,000

13,000

12,300

11,600

10,200

9,960

10,400

14,500

19,500

17,200

14,700

15,200

24,900

24,000

18,400

16,700

15,200

14,700

 16,700

19,500

20,500

19,000

17,200

15,700

14,500

13,700

14,900

Maximum

_

18,400

25,200

_

22,100

15,900

11,600

15,400

24,900

20,300

14,200

7,430

19,800

-

June

19,200

16,900

15,700

14,500

14,500

16,400

18,200

17,200

15,200

13,500

14,200

19,500

20,300

18,200

16,700

15,400

13,700

13,700

15,900

14,900

13,500

12,500

13,700

14,200

13,000

13,300

12,300

11,100

10,600

11,100

-

Minimum

_

6,540

9,960

_

6,980

5,600

6,760

8,810

9,960

10,600

6,540

5,220

6,760

-

July

11,300

12,300

12,300

10,900

9,730

10,600

12,800

14,200

12,500

11,600

9,960

9,500

8,580

8,810

9,730

10,200

10,200

11,100

12,300

12,100

9,960

9,730

7,890

7,200

6,760

6,540

6,760

7,430

6,980

6,760

7,200

Aug.

6,980

6,320

5,880

5,220

5,880

5,660

5,660

5,880

6,320

6,540

6,320

7,200

7,430

6,980

6,540

6,540

6,540

6,760

6,980

6,P80

6,980

6,760

6,540

7,430

6,100

6,320

6,760

6,760

6,100

5,660

5,660

Mean

_

9,880

14,290

_

10,310

8,654

8,487

11,080

15 , 880

14,970

9,820

6,441

11,450

-

Sept.

9,960

9,040

9,270

14,900

12,100

9,730

8,580

6,980

6,760

11,800

12,800

10,600

12,300

19,800

19,200

15,400

19,500

15,700

14,200

12,500

11,100

9,730

9,500

9,500

9,040

9,270

9,730

8,580

7,660

8,350

-

Runoff in 

acre-feet

_

587,900

878,800

_

633,700

480,600

521,900

659,400

976,200

890,800

603,800

396,100

681,500

7,311,000

a No gage-height record; discharge computed on basis of records for station near Concrete.
SKAGIT RIVER BASIN 67

Reservoirs in Skagit River Baein, Wash.

Ruby Reservoir.- Water-stage recorder, lat. 48°44', long. 121°04', in SEi sec. 35, T. 38 

N., R. 13 E., at Ross Dam on Skagit River, 9 miles northeast of Newhalem. Datum of 

gage is at mean sea level (city of Seattle bench mark). Records available, March 1940 

to September 1941. Maximum contents during year, 112,600 acre-feet July 19 (elevation, 

1,384.6 feet); minimum, 73,560 acre-feet Oct. 10 (elevation, 1,363.3 feet). Maximum 

contents during period 1940-41, that of July 19, 1941.

Reservoir is formed by concrete dam completed to elevation 1,365 feet in 1940; 

additional storage provided by timber crib to elevation 1,380 feet; storage began 

Mar. 11, 1940. Capacity, 102,300 acre-feet between elevation 1,250 feet (lowest 

outlet) and 1,380 feet (overflow). Dead storage negligible. Water used to supplement 

low flow of Skagit River through city of Seattle's Diablo and Newhalem power plants. 

Gage-height record collected in cooperation with city of Seattle. Figures given 

herein represent total contents.

Diablo Reservoir.- Water-stage recorder, lat. 48°43', long. 121°08', in Diablo Dam on 

Skagit River, sec. 6, T. 37 N., R. 13 E. (unsurveyed), 1 mile downstream from Thunder 

Creek and 6 miles northeast of Newhalem. Datum of gage is at mean sea level, subject 

to correction to datum of 1929. Records available, October 1929 (revised) to 

September 1941. October 1929 to September 1938, change in reservoir contents published with tables of monthly discharge for Skagit River at Newhalem, Wash. Maximum 

contents during year, 92,340 acre-feet Oct. 10 (elevation, 1,206.1 feet); minimum, 

83,580 acre-feet Sept. 28 (elevation, 1,196.4 feet). Maximum contents during period 

1929-41, 92,720 acre-feet July 14, 1933 (elevation, 1,206.5 feet).

Reservoir is formed by concrete dam, completed in 1930. Capacity, 76,800 acre-feet 

between elevations 1,040 feet (bottom of outlet pipes) and 1,205 feet (top of taintor 

gates). Dead storage, 14,500 acre-feet. Crest of spillway is at elevation 1,187 

feet. Water is used by city of Seattle for power development at Diablo and Newhalem 

power plants. Gage-height record collected in cooperation with city of Seattle. 

Figures given herein represent total contents.

Lake Shannon.- Staff gage, lat. 48°33', long. 121°44', in sec. 2, T. 35 N., R. 8 E., on 

Baker River, half a mile north of Concrete and 1 mile upstream from mouth of Baker 

River. Datum of gage is at mean sea level, subject to correction to datum of 1929. 

Records available, October 1938 to September 1941.

Reservoir is formed by concrete dam, completed in June 1927. Capacity, 132,500 

acre-feet between elevations 360 feet (lowest elevation for capacity operation) and 

435 feet (spillway crest). Dead storage unknown. Water is used by Puget Sound Power 

& Light Co. for power development. Gage-height records furnished by Puget Sound 

Power & Light Co. Figures given herein represent contents above elevation 340 feet 

(center line of outlet tunnel).

Monthly elevation and contents, water year October 1940 to September 1941

Late

Dec. 31............

Calendar year 194C

Sept .30. ...........

Mater year 1940-4]

Ruby Reservoir

Elevation 

(feet)-l

1,370.92 

1.381.37 

1,372.72 

1,381.04

1,381.19 

1,381.05 

1.369.82 

1,382.32 

1,382.11 

L. 378. 62 

1,384.17 

1,376.52 

1,373.32

Contents 

(acrefeet)

86,530 

106,190 

89,760 

105,540

_

105,830 

105,560 

84,580 

108,060 

107, 650 

100,820 

111,740 

96, 800 

91,770

-

Change In 

contents 

during 

month 

(acrefeet)

+19,660 

-16,430 

+15,780

(-105. 500

+290 

-270 

-20,980 

+23, 480 

-410 

-6,830 

+10,920 

-14,940 

-5,030

+5,240

Diablo Reservoir

Elevation 

(feet)t

1,204.80 

1,201.99 

1,203.60 

1,204.61

-

1,205.03 

1,199.93 

1,202.07 

1,205.14 

1,204.3S 

1,204.19 

1.204.22 

1,204.32 

1,198.58

-

Contents 

(acrefeet)

91,110 

88,470 

89,980 

90,930

_

91,330 

86,540 

88,550 

91,430 

90,720 

90,540 

90,570 

90, 660 

35,410

-

Change in 

contents 

during 

month 

(acrefeet)

-2,640 

+1, 510 

+950

+20

+400 

-4,790 

+2,010 

+2,860 

-710 

-180 

+30 

+90 

-5,250

-5,700

L&lce Shannon

Elevation 

(feet)1

429.09 

433.95 

432.85 

433.04

-

434.01 

427.71 

427.22 

427.29 

434.61 

434.61 

433.96 

434.29 

433.87

-

Contents 

(acrefeet)

143,140 

153,880 

151,420 

151,340

-

154,010 

140,150 

139,090 

139,240 

155, 360 

155,360 

153, 900 

154,640 

153,700

-

Jhange in 

contents 

during 

month 

(acrefeet)

+10.740 

-2,460 

+420

-1.660

+2,170 

-13,860 

-1,060 

+150 

+16,120 

0 

-1,460 

+740 

-940

+10,560

t Elevation at midnight <
68 SKAG1T RIVER BASIN

Beaver Creek near Newhalem, Wash.

Location.- Water-stage recorder, lat. 48°47', long. 121°05', In sec. 14, T. 38 N., R. 13 

E., three-quarters o! a mile upstream from Ruby Reservoir, about 3s miles north of Ross 

Dam on Skaglt River, and 10i miles northeast of Newhalem. Prior to Mar. 23, 1940, 

staff gage at same site but at datum 1.58 feet lower.

Drainage area.- 63 square miles.

Records available.- March 1940 to September 1941.

Extremes.- 1940: Maximum discharge during period March to September, 1,320 second-feet 

May 24 (gage height, 4.97 feet;; minimum, 139 second-feet Sept. 20.

1940-41: Maximum discharge during water year, 2,980 second-feet (gage height, 7.34 

feet); minimum, 105 second-feet Oct. 9.

Remarks.- Records excellent except those for period of no gage-height record, which are 

poor, and those for period of staff-gage readings, vftich are fair. No diversion or 

regulation.

Rating table for period Harch 1940 to September 1941 (gage height, in feet, and discharge, in

second-feet) 

(Shifting-control method used Aug. 24, 1940, to Dec. 3, 1940, July 13, 1941, to Aug. 17, 1941)

1.6 

1.8 

2.0 

2.2 

2.5

120

153

190

234

312

402

501

647

852

1,030

5.0 

5.7 

7.0

1,350

1,760

2,660

Discharge, in second-feet, 1940-41 

1940

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct. Nov. Dec. Jan. Feb. Mar.

a240

a330

a330

a340

a360

a330

a360

a390

a340

a310

a280

h253

h229

h220

h229

h51S

h467

h418

h402

h377

h377

h377

371

518

590

590

6B6

647

609

647

590

Apr.

536

484

434

399

371

359

365

450

450

418

402

484

786

767

609

501

450

666

609

518

464

501

536

590

572

590

554

518

467

416

-

May

590

767

666-

609

536

501

501

647

S96

1,110

1,010

852

706

686

706

666

666

746

874

852

786

941

1,160

1,160

964

706

554

501

554

647

941

June

852

726

706

647

572

518

572

501

536

628

746

830

852

666 590-

554

518

609

746

666

516

467

501

572

666

572

434

434

450

467

-

July

467

501

467

418

416

360

365

360

383

360

450

536

536

450

467

484

434

356

347

377

416

356

353

347

298

274

292

312

383

362

264

Aug.

271

253

246

246

256

296

321

306

304

263

256

284

229

209

203

211

232

253

266

306

284

229

222

261

263

227

340

270

229

266

290

Sept.

256

220

229

205

182

196

232

251

276

292

316

349

324

276

239

209

216

268

175

157

164

205

225

220

209

220

355

225

203

196

-

a No gage-height-record; discharge computed on basis of records for Ruby Creek near Newhale 

Thunder Creek near Newhalem.

h Computed from twice dally staff-gage readings.
SKAGIT RIVER BASIN

Discharge, in aeoond-feet, of Beaver Creek near Newhalem, Wash., 1940-41 Continued

1940-41

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

254

160

148

134

122

112

114

ISO

112

811

493

271

301

248

287

209

344

1,880

2,280

2,510

1,720

1,010

830

1,040

767

609

484

390

341

341

338

Nov.

350

347

332

306

284

271

256

362

374

326

287

253

225

207

168

179

173

167

158

151

141

131

128

130

126

123

131

150

179

177

-

Dec.

166

160

216

251

338

393

380

726

609

467

390

335

290

261

236

216

200

192

192

236

216

253

246

229

220

218

207

203

200

188

177

Jan.

167

155

150

144

136

133

126

120

133

155

167

171

184

190

184

182

200

418

399

332

284

258

234

218

220

200

188

182

182

190

234

Feb.

374

377

338

301

276

256

241

229

213

205

205

194

182

171

164

157

151

150

146

143

139

136

133

130

125

125

143

211

-

_

-

Mar.

246

281

258

236

225

213

211

220

222

213

211

2,09

207

200

203

213

229

253

263

248

232

234

222

213

216

351

318

353

402

467

484

Apr.

501

628

536

450

402

396

365

344

371

402

374

359

341

341

386

344

306

287

279

295

350

402

467

484

484

536

554

572

572

706

-

Bay

746

666

554

450

418

371

329

292

263

256

353

788

666

484

418

467

666

536

418

371

368

418

609

746

647

554

572

518

484

450

647

June

590

536

501

467

554

609

609

467

434

484

647

788

767

590

554

467

450

518

467

399

371

450

501

402

390

356

380

434

467

418

-

July

418

434

434

418

399

418

467

396

362

341

347

362

393

434

484

554

590

572

536

450

396

315

271

253

246

290 309"

306

284

271

256

Aug.

232

211

211

213

198

207

229

253

279

268

266

318

266

244

261

261

246

251

248

261

274

263

276

222

184

194

248

192

180

169

395

Sept.

450

290

401

484

312

258

220

188

190

426

284

253

435

484

341

509

467

347

290

266

232

211

227

234

334

326

234

196

190

200

-

Peak dlacharge.- Oct. 18 (6:15 p.m.) 2,160 

(4 a.m.) 2,900 sec.-ft.

sc.-ft.; Oct. 19 (6 p.m.) 2,980 sec.-ft.; Oct. 20

Jiontnly discharge, in second-feet, 1940-41

Month

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

Calendar year 1940 ........

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

Water year 1940-41. ........

Secondfoot-days

12,695 

15,290 

23,523 

18,156 

12,275 

8,102 

7,096

-

18,780 

6,612 

8,611

-

6,236 

5,615 

7,953 

12,834 

15,525 

15 , 067 

12,006 

7,520 

9,179

125,938

Maximum

686 

788 

1,160 

852 

536 

340 

355

-

2,510 

374 

726

-

418 

377 

484 

706 

788 

788 

590 

395 

509

2,510

Minimum

220 

359 

501 

434 

274 

203 

157

-

112 

123 

160

-

120 

125 

200 

279 

256 

356 

246 

169 

188

112

Mean

410 

510 

759 

605 

396 

261 

237

-

606 

220 

278

-

201 

201 

257 

428 

501 

502 

337 

243 

306

345

Per 

square 

mile

6.51 

8.10 

12. Q 

9.60 

6.29 

4.14 

3.76

-

9.62 

3.49 

4.41

-

3.19 

3.19 

4.08 

6.79 

7.95 

7.97 

6.14 

3.86 

4.86

5.48

Runoff

Inches

7.49 

9.03 

13.89 

10.72 

7.25 

4.78 

4.19

-

11.09 

3.90 

5.08

-

3.68 

3.31 

4.69 

7.58 

9.16 

6.89 

7.09 

4.44 

5.42

74.33

Acre-feet

25,180 

30,330 

46,660 

36,010 

24,350 

16,070 

14,070

192,700

37,250 

13,110 

17 , 080

-

12,370 

11,140 

15,770 

25,460 

30,790 

29,880 

23,810 

14,920 

18,210

249,800
70 SKAGIT RIVER BASIN 

Ruby Creek near Newhalem, Wash.

Location.- Water-stage recorder, lat. 48°43', long. 121°00', In SEi sec. 5, T. 37 N., R. 

14 E., about 2 miles upstream from mouth and 12 miles northeast of Newhalem.

Drainage area.- 203 square miles.

Records available.- June 1919 to March 1920, April 1930 to September 1941.

Average discharge.- 11 years (1930-41), 634 second-feet.

Extremes.- Maximum discharge during year, 1,630 second-feet Oct. 20 (gage height, 5.88 

reet); minimum, 95 second-feet Oct. 9 (gage height, 3.03 feet).

1919-30, 1930-41: Maximum discharge, 6,730 second-feet Feb. 27, 1932 (gage height, 

14.15 feet, site and datum then in use); minimum, 40 second-feet Feb. 22, 1937.

Remarks.- Records excellent. No diversion or regulation.

Cooperation.- Gage-height record collected In cooperation with and results of ten dlscharge measurements furnished by city of Seattle.

Rating table, water year 1940-41 (gage height. In feet, 

In second-feet)

md discharge,

3.1 108 4.5 523 

3.3 147 4.8 690 

3.6 214 5.1 S95 

3.9 294 5.4 1,140 

4.2 393 5.7 1,420

Discharge, in second-feet, water year-October 1940 to September

Daj

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

160 

131 

119 

112 

108

103 

99 

97 

97 

324

414 

247 

255 

222 

216

190 

202 

746 

1,110 

1,280

1,130 

776 

602 

684 

602

495 

425 

386 

361 

340 

327

Nov.

303 

291 

274 

261 

250

247 

250 

247 

226 

197

212 

229

250 

209 

204

197 

200 

192 

183 

186

177 

160 

172 

172 

170

166 

177 

195 

234 

214

Dec.

204 

219 

294 

297 

331

340 

344 

450 

421 

350

303 

286 

277 

272 

269

269 

255 

229 

224 

229

222 

247 

229 

224 

214

209 

204 

202 

197 

192 

188

Jan.

170 

166 

1S3 

177 

164

168 

164 

160 

166 

170

170 

172 

175 

177 

172

172 

183 

229 

216 

204

190 

204 

192 

188 

190

181 

177 

179 

177 

183 

190

Feb.

212 

209 

204

200 

195

192 

195 

190

1S8 

1S6

183 

179 

168 

164 

166

166 

164 

164 

166 

166

166 

164 

155 

166 

160

158

162 

181

Mnn+h SeCOndMontl1 foot-days

Octo 

Hove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

Hay 

June 

July 

Augu 

Sept

Wa

lendar year 1940

SLTy

ember .....................

12,410 

6,445 

8,191

74,116

5,609 

4,969 

8,488 

24,212 

28,586 

23,801 

10,780 

6,168 

8,213

ter year 1940-41 .......... 147,872

Mar.

195 

207 

197 

192 

188

1S6 

1S8 

197 

197 

197

204 

209 

209 

212 

219

239 

261 

277 

274 

263

258 

255 

244 

242 

261

312 

361 

429 

518 

619 

678

Maximum

1,280 

303 

450

2,750

229 

212 

678 

1,370 

1,420 

1,320 

509 

347 

476

1,420

Apr.

736 

991 

903 

769 

684

636 

613 

596 

672 

729

729 

703 

678 

690 

729

672 

624 

574 

559 

585

678 

790 

919 

959 

1,020

1,100 

1,140 

1,140 

1,230 

1,370

May

1,420 

1,280 

1,140 

975 

S46

742 

672 

613 

574 

580

742 

1,420 

1,320 

1,050 

888

860 

943 

825 

703 

642

636 

710 

975 

1,230 

1,230

1,060 

935 

888 

825 

762 

1,050

June

1,060 

983 

911 

903 

919

991 

1,140 

911 

797 

839

1,100 

1,320 

1,230 

967 

888

755 

789 

684 

624 

569

548 

648 

678 

574 

490

450 

476 

509 

591 

523

Minimum Mean

97 400 

160 215 

188 264

97 476

160 181 

155 177 

1S6 274 

559 S07 

574 922 

450 793 

214 348 

158 199 

179 274

97 405

1941

July

509 

490 

504 

467 

425

463 

500 

393 

357 

337

340 

337 

344 

361 

382

389 

485 

425 

368 

321

288 

258 

239 

242 

229

239 

239 

242 

229 

224 

214

Per 

square 

mile

1.97 

1.06 

1.30

2.33

.892 

.672 

1.35 

3.98 

4.54 

3.91 

1.71 

.980 

1.35

2.00

Aug.

200 

188 

190 

188 

186

186 

197 

202 

209

200

212 

347 

244 

219 

216

209

197 

197 

195 

200

202 

195 

192 

168 

158

160 

197 

183 

190 

166 

175

Sept.

190 

202 

222 

302 

224

207 

207 

179 

179 

292

239 

224 

257 

364 

327

40S 

476 

389 

340 

327

303 

2S6 

280 

274 

263

280 

252 

236 

232 

252

Runoff

Inches

2.27 

1.18 

1.50

31.81

1.03 

.91 

1.56 

4.44 

5.24 

4.36 

1.97 

1.13 

1.50

27.09

Ac re- feet

24,610 

12,780 

16,250

345,400

11,130 

9,860 

16,840 

48,020 

56,700 

47,210 

21,380 

12,230 

16,290

293,300
SKAGIT RIVER BASIN 

Thunder Creek near Newhalem, Wash.

71

Location.- Water-stage recorder, lat. 48°40', long. 131°04', in SEi sec. 23, T. 37 H., R. 

13 E. (unsurveyed), half a mile upstream from backwater from Dlablo Reservoir, 8 miles 

east of Newhalem, and 30 miles northeast of Marblemount.

Drainage area.- 98 square miles.

Records available.- October 1930 to September 1941.

Average discharge.- 11 years, 627 second-feet.

Extremes.- Maximum discharge during year, 4,790 second-feet Oct. 20 (gage height, 9.56 

reet); minimum, 136 second-feet Feb. 36 (gage height, 2.88 feet).

1930-41: Maximum discharge, 8,780 second-feet Feb. 26, 1933 (gage height, 11.3 

feet), from rating curve extended above 2,000 second-feet; minimum not determined, occurred during period of ice effect.

Remarks.- Records excellent. No diversion or regulation.

Cooperation.- Gage-height record collected in cooperation with, and results of twenty discharge measurements furnished by city of Seattle.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

572

355

341

295

270

266

302

306

370

2,170

1,350

571

514

450

456

343

830

3,090

3,960

3,420

2,040

1,020

890

1,000

685

545

456

405

382

371

342

Nov.

315

298

276

261

246

240

243

243

221

202

197

182

185

185

185

187

192

182

173

170

164

147

151

155

153

147

185

218

325

279

-

Dec.

261

3 39

545

448

460

460

456

639

550

440

374

328

302

276

261

246

235

224

221

240

226

264

243

229

215

210

205

197

197

187

180

Jan.

166

158

160

160

149

147

147

143

153

168

173

173

175

173

166

162

190

335

282

249

224

215

205

190

192

185

178

173

168

173

192

Month

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

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

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

Calendar year 1940 .........

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

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

Haroh .........................

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

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

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

July

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

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

Water year 1940-41 ..........

Feb.

23E

22 £

2 IE

20S

196

19C

187

17 E

17C

16E

16 

168

151

146

146

142

13 £

136

134

134

134

133

12 S

12?

127

127

134

173

-

_

-

Secondtoot days

28,367

6,307

9,708

218,412

5,724

4,514

6,230

12 , 888

18,868

26,724

37,024

28,841

17,992

203,187

Mar.

187

210

190

178

168

164

162

168

164

162

164

164

166

166

168

182

197

210

202

190

185

175

166

164

170

205

238

276

325

367

397

Maximum

3,960

325

639

3,960

335

235

397

805

1,180

1,550

2,030

1,490

1,140

3,960

Apr.

432

585

485

401

353

 532

302

295

322

342

328

318

33.5

325

378

339

308

315

279

308

374

456

524

537

567

612

626

630

695

805

-

Hay

895

757

621

498

428

371

332

302

286

305

537

1,180

915

658

559

590

639

494

408

389

416

528

810

1,020

920

766

667

630

532

545

870

Minimum

266

147

180

138

143

127

162

279

286

639

764

499

354

127

June

810

752

690

733

825

955

975

695

695

825

1,230

1,550

1,350

1,060

1,000

815

815

840

737

639

671

1,040

1,020

810

709

658

820

965

1,040

1,000

-

Mean

915

210

313

597

185

161

201

430

609

891

1,194

930

600

557

July

1,020

1,100

1,110

1,140

1,080

1,340

1,380

1,060

940

935

1,030

1,090

1,280

1,490

1,710

1,870

2,030

1,890

1,750

1,360

1,150

880

764

786

816

1,020

1,090

1,090

950

971

902

Per

square 

mile

9.34

2.14

3.19

6.09

1.89

1.64

2.05

4.39

6.21

9.09

12.2

9.49

6.12

5.68

Aug.

764

676

633

618

688

853

1,

1,

1,

010

090

250

1,100

1,200

1,

1,

1,

1,

1,

1,

1,

1,

490

130

070

150

030

050

120

140

1,210

1,240

1,

1,

090

070

688

641

672

725

579

499

505

860

Sept.

795

768

1,120

1,140

704

568

489

431

508

796

474

505

728

720

489

1,040

682

489

425

408

362

375

480

528

534

777

422

370

354

511

-

Runoff

Inches

10.76

2.39

3.68

82.87

2.17

1.71

4! 89

7.16

10.14

14.05

10.94

6.83

77.08

Acre-feet

56,270

12,510

19,260

433,200

11,350

8,950

12,360

25,560

37,420

53,010

73,440

57,210

35,690

403,000

Peak discharge.- Oct. 20 (6 p.m.) 4,790 aeo.-ft.s July 17 (8:15 p.m.) 2,420 aeo.-ft.
SKAGIT RIVER BASIN 

Stetar.tle Creek near Newhalem, Wash.

Location.- Water-stage recorder, lat. 48°43'40", long. 121°09'30", In MEi sec. 6, T. 37 N., 

R. 13 E., three-quarters of a mile upstream from mouth, 54 miles northeast of llewhalem, 

and 184 miles northeast of Marblemount.

Drainage area.- 21.4 square miles.

Records available.- September 1933 to September 1941. December 1913 to March 1914 and 

December 1914 to April 1915, at site half a mile downstream, published as Stetattle - 

Creek near Marblemount, Wash.

Extremes.- Maximum discharge during year, 1,940 second-feet Oct. 19 (gage height, 6.03 

feet), from rating curve extended above 700 second-feet; minimum, 24 second-feet Oct. 9 

(gage height, 2.13 feet).

1913-15, 1933-41: Maximum discharge, 4,520 second-feet Nov. 5, 1934 (gage height, 

10.4 feet, site and datum then in use), from rating curve extended above 400 secondfeet; minimum, 9 second-feet Nov. 9, 10, 11, 1936.

Remarks.- Records excellent except those for periods of no gage-height record, which are 

good. No diversion or regulation.

Cooperation.- Gage-height record collected in cooperation with, and results of eight discharge measurements furnished ty city of Seattle.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

68 

39 

34 

32 

29

26 

26 

25 

50 

609

191 

129 

139 

102 

79

60

390 

1,050 

1,130

731

570 

247

239 

370 

198

139 

106 

92 

106 

131 

128

Nov.

133 

114 

103 

90 

82

92

124 

133 

104 

89

79 

68 

66 

64 

66

68 

77 

70 

64 

59

54 

52 

51 

53 

63

58 

81 

116 

172 

132

Dec.

Ill 

151 

267 

176

281

248 

276 

649 

308

187

134 

107 

90 

76 

68

61 

57 

57 

65 

113

95 

117 

101

93 

PO

84 

79 

78 

86 

81 

73

Jan.

64

58 

54 

50 

48

46

45 

42 

65 

88

92 

90 

99 

90 

79

78 

216 

426 

230 

156

119 

99 

86 

78 

90

86

78 

79 

78 

116 

174

Month

Goto 

Move 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

ber .......................

lendar year 194C 

ary

.

h ............. ...... .

1 .................... .

ember ................. ...

ter year 1940-41 ..........

Feb.

248 

187 

144 

121 

109

93

ae

79 

a70 

a 65

a 65 

a60

aSO 

a50

48 

47 

46 

46 

45

45

44 

39 

40 

39

40 

72 

190

Secondfoot-days

7,265 

2,577 

4,459

54,836

3,199 

2,225 

3,454 

4,870 

6,147 

5,271 

2,662 

1,461 

4,933

48,523

Mar.

184 

179 

132 

107 

93

88 

88 

97 

88 

81

81 

81 

78 

74 

81

95 

105 

109 

93 

79

71 

71 

65 

62 

81

132 

158 

179 

192 

218 

212

Maximum

1,130 

172 

649

1,130

426 

248 

218 

312 

482 

301 

132 

164 

506

1,130

Apr.

212 

242 

153 

113 

103

109 

99 

103 

128 

134

117 

115 

115 

134 

161

115 

93 

84 

95 

133

171 

212 

218 

218 

230

239 

230

218 

264 

312

May

312

212 

174 

126

117

115 

92 

78 

74 

106

240 

482 

239 

163

146

241 

308 

204 

a!60 

a!30

a!30 

a200 

324 

3 'SO 

242

209

192 

161 

151 

179 

310

Minimum

25 

51

57

25

42

39 

62

84 

74 

115 

45 

35 

57

25

June

233

215 

181 

187 

215

224 

215

139 

153 

190

264 

301 

245 

184 

174

134 

144 

184 

171 

141

134 

174 

153 

121 

128

115 

132 

1-S4 

158 

128

Mean

234 

85.9 

144

150

103 

79.5 

111 

162 

198 

176 

85.9 

47.1 

164

133

July

130 

132 

128 

119 

109

119 

124 

99 

90 

83

84 

88 

93 

99 

107

111 

126 

107 

92 

74

62 

53 

48 

a 45

a45

a55 

a50 

a50 

a,60 

n45 

a45

Per 

square 

mile

10.9 

4.01 

6.73

7.01

4.81 

3.71 

5.19 

7.57 

9.25 

8.22 

4.01 

2.20 

7.66

6.21

Aug.

a45 

a40 

a40 

a40 

a40

a40 

a45 

a45 

44 

44

46 

52 

45 

42

41

39 

38 

38 

38 

37

37 

37 

54 

41 

35

39 

65 

60 

45 

45 

164

Sept.

171 

97 

221 

310 

128

93 

71 

57 

79 

185

101 

158 

506 

487 

221

469 

252

184 

144 

121

95 

84

79 

71 

67

114 

81 

73 

67 

147

Runoff

Inches

12.63 

4.48 

7.75

95.31

5.56 

3.87 

6.00 

8.46 

10.68 

9.16 

4.63 

2.54 

8.57

84.33

Acre-feet

14,410 

5,110 

8,840

108,800

6,350 

4,410 

6,850 

9,660 

12 , 190 

10,450 

5,280 

2,900 

9,780

96,230

Peak discharge.- Oct. 18 (10J30 a.m.) 1,600 sea. -ft.; Oet. 19 (8s30 a.m.) 1,940 see. -ft.; Oct. 20

30 p.m.; 1,280 see.-ft.

Ho gage-height record; discharge computed on basis of one discharge measurement and records for 

ver Creek near Newhalem.
SKAQIT RIVER BASIN 73

Cascade River at Marblemount, Wash.

Location.- Water-stage recorder, lat. 48°31'45", long. 121°23'30", in SWi sec. 9, T. 35 

N., R. HE., 2 miles east of Marblemount and 2i miles upstream from mouth.

Drainage area.- 180 square miles.

Records available.- September 1928 to September 1941.

Average discharge.- 13 years, 957 second-feet.

Extremes.- Maximum discharge during year, 4,430 second-feet Oct. 19 (gage height, 6.58 

reet); minimum, 256 second-feet Oct. 9 (gage height, 1.66 feet).

1928-41: Maximum discharge, 12,900 second-feet Feb. 26, 1932 (gage height, 9.88 

feet); minimum, 149 second-feet Nov. 15, 1929, or may have been less during January or 

February 1929, /(hen stage-discharge relation was affected by ice; minimum gage height, 

1.11 feet Feb. 8, 1937.

Remarks.- Records excellent except those for periods of shifting control, which are good, 

and those for periods of no gage-height record, which are fair. No diversion or 

regulation.

Rating table, water yoar 1940-41 (gago height, In feot, and discharge, In second-feet) 

(Shifting-control method used Oct. 1-9, Oct. 22 to Kov. 28, June 13 to July 5)

1.8 305 3.0 765 

2.0 365 3.5 1,020 

2.3 470 4.0 1,350 

2.6 590 4.5 1,760

Discharge, in second- feet, water year October

Day

1 

2 

3 

4 

5

6 

7 

8 

9

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

494 

331 

343 

317 

305

283 

289 

276 

305 

2,080

1,810 

890 

905 

630 

550

459 

637 

3,010 

3,250 

3,100

2,690 

1,560 

1,180 

1,510 

1,140

890 

742 

675 

352 

875 

675

Nov.

6SO 

570 

530 

486 

463

466 

530

550 

510 

500

460 

430 

410 

410 

410

430 

450 

450 

410 

380

350 

340 

320 

340 

362

343 

469 

640 

1,390 

992

Dec.

890 

1,240 

1,490 

1,210 

1,320

1,240 

1,320 

1,670 

1,320 

1,050

890 

790 

720 

652 

610

570 

530 

530 

550 

790

630 

720 

630 

610 

570

550 

530 

530 

570 

530 

498

Jan.

463 

437 

419 

408 

391

378 

365 

356 

385 

430

430 

433 

440 

437

422

433 

641 

1,180 

840 

698

810 

570 

530 

506 

570

530 

498 

498 

478 

498 

810

Feb.

765 

652 

590 

650 

530

502 

494 

463 

440 

426

419 

408 

385 

368 

359

350 

343 

337 

331 

325

322

'610 

305 

305 

305

310 

330 

440

M. AT-" Second 

Month foot-days

Octo 

Move 

Dece

Ca

Janxi 

Febi 

Marc 

Apr! 

May 

June 

Julj 

Augxi 

Sept

Wa

lendar year 194< 

ary

h .................... ....

st . . ....

ember .

32,653

15,021 

25,750

16,158

15,884 

11,664 

13,928 

22,075 

33,280 

34,319 

26,583 

17,505 

26,577

ter year 1940-41 .... .... 275,239

Mar.

550 

600 

510 

466 

440

419 

408 

416 

398 

388

391 

391 

375 

368

375

398 

419 

433 

408 

385

365

368 

350 

340 

356

419 

482 

570 

830 

720 

790

Maximum

3,250 

1,390 

1,670

3,250

1,180 

765 

790 

1,280 

2,050 

1,850 

1,180 

815 

1,800

3,250

Apr.

840 

1,050 

815 

652 

610

610 

550 

530 

590 

630

590 

550 

530 

570 

698

610 

570 

550 

550 

590

698 

790 

890 

890 

940

992 

940 

890 

1,080 

1,280

5.0 2,250 

5.5 2,760 

6.0 3,410

1940 to September

May

1,510 

1,180 

1,020 

840 

765

720 

630 

570 

530 

590

1,000 

2,050 

1,480 

1,050 

890

1,020 

1,350 

1,080 

915 

915

965 

1,110 

1,520 

1,670 

1,470

1,240 

1,050 

965 

865 

890 

1,430

Minimum

276 

320 

498

276

356 

305 

340 

530 

530 

840 

570 

405 

440

276

June

1,280 

1,180 

1,050 

1,080 

1,180

1,460 

1,760 

1,140 

992 

1,130

1,590 

1,850 

1,550 

1,180 

1,140

965 

992 

1,140 

1,080 

965

915 

1,180 

1,050 

940 

890

840

865 

890 

1,080 

965

Mean

1,053 

501 

831

864

512 

417 

449 

736 

1,074 

1,144 

858 

565 

886

754

1941

July

992 

1,020 

1,050 

992 

965

1,110 

1,180 

940 

865 

815

815 

840 

915 

965 

1,050

1,110 

1,110 

1,080 

1,050 

890

765 

630

570 

590

570

630 

652 

652 

590 

590 

590

Per 

square 

mile

5.85 

2.78 

4.62

4.80

2.84 

2.32 

2.49 

4.09 

5.97 

6.36 

4.77 

3.14 

4.92

4.19

Peak discharge.- Oct. 18 (11 30 a.m.) 4,160 sec. -ft.; Oct. 19 (12 m. ) 4,430 se

Aug.

506 

444 

448 

448 

478

510 

570 

610 

652 

610

610 

815 

630 

590 

610

570 

590 

810 

810 

610

630 

570 

700 

482 

444

510 

630 

530 

433 

405 

650

Sept.

765 

630 

1,080 

1,560 

675

630 

 50 

440

662 

1,140

698 

790 

1,320 

1,800 

1,210

1,630 

1,300 

992 

865 

865

742 

675 

742 

698 

630

908 

652 

570 

550 

808

Runoff

Inches

6.75 

3.10 

5.32

65.31

3.28 

2.41 

2.88 

4.56 

6.88 

7.09 

5.49 

3.62 

5.49

56.87

Acre-foet

64,770 

29,790

51,070

627,100

31,510 

23,140 

27,630 

43,790 

66,010 

68,070 

52,730 

34,720 

52,710

545,900

;.-ft.; Oct. 20

(6:30 p.m.) 4,250 sec.-ft.; Oct. 21 (10 a.m.) 3,260 sec.-ft.

Note.- No gage-height record Nov. 10-23, Feb. 22 to Mar. 2; discharge computed on basis of 

recorded range of stage and records for Sauk River above Whitechuck River, near Darrington, and 

Thunder Creek near Newhalem.
74 SKAGIT RIVER BASIN 

Sauk 'River above Whltechuck River, near Darrlngton, Wash.

Location.- Water-stage recorder, lat. 48°10'00", long. 121 027'45". In NWi sec. 24, T. 31 

N., R. 10 E., half a mile upstream from Whltechuck River and 9t miles southeast of 

Darrlngton.

Drainage area.- 152 square miles.

Records available.- August to November 1910 (fragmentary gage heights), October 1917 to 

Septemoer l$'<&,, August 1928 to September 1941.

Average discharge.- 18 years (1917-22, 1928-41), 1,085 second-feet.

Extremes.- Maximum discharge during year, 4,180 second-feet Oct. 18 (gage height, 5,94 

feet); minimum, 147 second-feet Oct. 8, 9 (gage height, 2.14 feet).

1917-22. 1928-41: Maximum discharge, 23,000 seuond-feet Dec. 12, 1921 (gage height, 

14.65 feet), from rating curve extended above 3,000 second-feet; minimum, 115 secondfeet Nov. 15, 16, 30, Dec. 1, 1936.

Remarks.- Records good except those for periods of no gage-height record, which are fair. 

No clivers ion or regulation.

Rating table, water year 1940-41 (gage height, In feet, and discharge,

in second-feet) 

(Shifting-control method used Oct. 1-9)

2.2 186 3.0 600 4.0 1,520 

2.4 264 3.3 839 4.5 2,090 

2.7 411 3.6 1,110 5.0 2,740

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

277 

219 

197 

201 

197

176 

166 

166 

156 

2,080

2,070 

936 

964 

660 

507

423 

519 

3,940 

2,470 

2,470

2,670 

1,740 

1,290 

1,630 

1,270

982 

805 

699 

691 

1,070 

1,420

Nov.

1,120 

964 

S31 

715 

630

615 

763 

909 

aSOO 

a650

a550 

a500 

a450 

a450 

446

463 

488 

488 

452 

428

406 

374 

358 

379 

494

452

640 

1,300 

2,600 

1,630

Dec.

1,190 

1,160 

1,630 

1,420 

al,750

al,950 

a2,100 

a2,300 

al,750 

al,350

al,100 

a900 

814 

723 

652

59S 

546 

532 

630 

1,230

936 

1,030 

901 

831

763

747 

699 

699 

805

723 

638

Jan.

566 

519 

482 

463 

440

428 

406 

384 

395 

423

446 

452 

463 

469 

469

546 

892 

2,280 

1,420 

1,040

848 

731 

645 

608 

814

883 

715 

645 

600 

630 

892

Feb.

1,25C 

1,12C 

927 

789 

707

646 

622 

573 

532 

513

507 

475 

440 

411 

384

374 

35S 

342 

33E 

33S

324 

324 

319 

319 

319

324 

384 

63C

M°nth fcTt^s

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 1940 

ary -

32,051 

21,345 

33,092

324,433

ember .....................

20,994 

14,589 

17,112 

25,215 

36,021 

26,863 

12,277 

6,680 

22,478

ter year 1940-41 .......... 268,717

Mar.

'772 

SS3 

715 

608 

546

513 

488 

488 

482 

457

446 

434 

423 

411 

395

406 

423 

507 

532 

4S2

440 

463 

446 

423 

417

469 

580 

683 

805 

955 

1,020

Maximum

2,940

2,600 

2,300

2,940

2,280 

1,250 

1,020 

1,360 

2,210 

1,310 

638 

268 

1,800

2,940

Apr.

1,070 

1,250 

1,020 

S57

772

739 

668 

63S 

691

747

731 

668 

622 

630 

763

691 

622 

586 

573 

600

675 

780 

918 

964 

1,070

1,100 

1,110 

1,090 

1,210 

1,360

May

al,150 

a900 

1,050 

901 

918

918 

763 

668 

600 

615

945 

1,6SO 

1,420 

1,160 

982

1,360 

2,210 

1,680 

1,310 

1,170

1,140 

1,250 

1,470 

1,680 

1,520

1,300 

1,100 

1,000 

918 

883 

1,360

Minimum

156 

358 

532

156

384 

319 

395 

573 

600 

622 

227 

193 

329

156

June

1, 

1,

1,

1,

1, 

1,

1, 

1, 

1,

Mean

1,034 

712 

1,067

886

677 

521 

552 

840 

1,162 

895 

396 

215 

749

736

210 

070 

000 

936 

010

110 

310 

945 

831 

865

150 

310 

170 

918 

839

739 

699 

848 

901 

927

772 

831 

772 

683 

707

660 

622 

622 

731

675

July

638 

615 

608 

552 

526

532 

532 

482 

440 

411

406 

400 

406 

423 

434

446 

452 

423 

400 

353

319 

286 

260 

256 

244

244 

248 

244 

235 

235 

227

Per 

square 

mile

6.80 

4.68 

7.02

5.83

4.45 

3.43 

3.63 

5.53 

7.64 

5.89 

2.61 

1.41 

4.93

4.84

Aug.

219 

204 

204 

201 

197

197 

201 

208 

212 

212

216 

260 

223 

212 

219

212 

204 

201 

201 

208

208 

216 

268 

235 

193

201 

235 

256 

216 

193 

248

Sept.

363 

329 

535 

8SO 

494

411 

440 

338 

403

1,070

707 

645 

952 

1,800 

1,520

1,SOO 

1,580 

1,100 

892 

805

675 

580 

526 

475 

440

571 

593 

482 

482 

590

Runoff

Inches

7.84 

5.22 

8.10

79.39

5.14 

3.57 

4.19 

6.17 

8.81 

6.57 

3.00 

1.63 

5.50

65.74

Acre feet

63,570 

42,340 

65,640

643,500

41,640 

28,940 

33,940 

50,010 

71,450 

63,280 

24,350 

13,250 

44,580

533,000

a Ho gage-height record; 

River near Granite Palls.

discharge computed on basis of records for South Fork of Stlllaguamlsh
SKAGIT RIVER BASIN 75

Sauk River near Sauk, Wash.

Location.- Water-stage recorder, lat. 48°25'15", long. 121°33'45", in NWi sec. 19, T. 34

 N., R. 10 E., 5 miles upstream from mouth, 5 miles southeast of Sauk, and 8 miles downstream from Sulattlfi River. Datum of gage Is approximately 266 feet above mean sea 

level (river-profile survey).

Drainage area.- 714 square miles.

Records available.- July 1926 to September 1941. August 1910 to August 1912, various 

gages between a point 1 mile downstream from and a point 5 miles upstream from present 

site, published as Sauk River near Suiattle Crossing, near Sauk, Wash. All early discharge measurements made at point 5 miles upstream from present site.

Average discharge.- 13 years (1928-41), 4,038 second-feet.

Extremes.- Maximum discharge recorded during year, 7,980 second-feet May 17 (gage height,

 6.30 feet)/ discharge probably greater Oct. 18, during period of doubtful gage-height 

record; minimum not determined (probably occurred during period of no gage-height record, Oct. 1-10). 1910-12. 1928-41: Maximum discharge, 68,500 second-feet Feb. 26, 1932 (gage height, 

15.83 feet); minimum, 572 second-feet Dec. 5, 1929; discharge may have been less sometime during period of ice effect Jan. 10-27, 1930.

Remarks.- Records fair. No diversion or regulation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

18

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

al,300

al,S10

al,230

al,210

al.SOO

al,180

al,200

al,190

al,200

a6,100

6,060

3,460

2,650

2,470

2,110

1,540

1,440

6,300

6,060

6,340

6,620

4,500

3,680

3,680

3,360

2,740

2,470

2,470

2,470

3,040

3,570

Nov.

3,250

3,040

2,840

2,560

2,300

2,560

2,840

2,940

2,940

2,560

2,470

2,300

2,220

2,220

2,130

2,130

2,300

2,220

2,050

2,050

1,990

1,920

1.P90

2,220

2,650

2,470

2,650

3,330

6,770

5,000

-

Dec.

3,910

4,140

4,760

4,760

5,000

5,260

5,520

6,200

5,920

5,000

4,330

3,910

3,570

3,360

3,040

2,840

2,740

2,740

2,940

4,880

3,910

3,800

3,360

3,250

3,040

3,140

3,040

3,040

3,460

3,250

2,940

Jan.

2,560

2,380

2,220

2,220

2,050

2,000

1,910

1,810

1,870

2,100

2,110

2,100

2,220

2,130

2,080

2,330

3,P,60

5,390

4,380

3,680

3,140

2,740

2,560

2,380

3,040

3,460

3,040

2,740

2,650

2,650

3,360

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

nay UAV ...........................

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

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

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

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

Water year 1940-41 ..........

Feb.

4,260

3,910

3,360

2,840

2,560

2,380

2,300

2,130

2,100

2,000

2,030

1,920

1,730

1,630

1,630

1,570

1,520

1,520

1,480

1,480

1,510

1,500

1,520

1,560

1,500

1,620

2,070

3,250

-

-

-

Secondfoot-days

94,050

30,910

121,100

1,245,710

82,610

67 ,200

129)020

111,440

77,970

55,110

89,720

1,053,920

Mar.

3,250

3,570

2,340

2,380

2,130

2,000

1,970

2,000

1,970

1,950

1,950

1,950

1,890

1,800

1,760

1,310

1,910

. 2,130

2,300

2,000

1,740

1,780

1,760

1,690

1,690

1,870

2,100

2,380

2,650

2,940

3,040

Maximum

6,620

6,770

6,200

10,000

5,390

4,260

3,570

4,630

5)780

3,360

2,300

4,760

7,520

Apr.

3,140

3,910

3,250

2,650

2,470

2,560

2,300

2,220

2,380

2,650

2,470

2,300

2,220

2,220

2,650

2,470

2,300

2,220

2,130

2,220

2,470

2,840

3,250

3,250

3,460

3,680

3,800

3,680

4,020

4,630

-

May

4,630

4,020

3,800

3,250

3,250

3,360

2,840

2,470

2,220

2,220

3,040

5,730

5,390

4,140

3,460

4,630

7,520

5,650

4,880

4,260

4,140

4,260

5,000

5,920

5,520

4,630

3,910

3,570

3,360

3,140

4,760

Minimum

1,180

1, 920

2,740

1,000

1,810

1,480

1, 690

2)220

2,740

l)540

1,840

1,180

June

4,260

3,910

3,680

3,460

3,910

4,260

5,130

3,680

3,140

3,250

4,630

5,780

5,390

4,020

3,800

3,360

3,360

3,680

3,570

3,250

3,040

3,460

3,800

3,360

3,140

2,940

2,740

2,840

3,460

3,140

-

Mean

3,034

2 , 697

3,906

3,404

2,665

2,106

2,168

4)l62 3 715 '_- _

1 *7"7R

2 ',991

2,887

July

3,140

3,140

3,360

3,250

3,040

3,040

3,140

2,650

2,470

2, 3RD

2,470

2,470

2,560

2,650

2,740

2,940

3,140

3,250

2,840

2,470

2,220

2,070

1,870

1,300

1,780

1,800

2,050

1,940

1,680

1,720

1,810

Per 

square 

mile

4.25

3.78

5.47

4.77

3 »73

3 04 4)01

5. 83

5.20

3 52

2.49

4.19

4.04

Aug.

1,720

1,

1,

1,

600

620

620

1,690

1,760

1,

1,

1,

830

870

840

1,740

1,690

2,

1,

1,

300

870

780

1,760

1,620

1,

1,

1,

750

910

890

1,940

1,840

1,

1,

1,

810

860

890

1,700

1,830

1,

1,

1,

1,

810

750

640

540

1,640

Sept.

2,220

2,130

2,300

3,140

2,110

2,380

2,300

1,840

2,020

3,680

2,650

2,740

3,360

4,760

4,630

4,260

4,380

4,140

3,360

3,460

3,360

2,940

2,740

2,380

2,560

3,360

2,840

2,380

2,560

2,740

-

Runoff

Inches

4.90

4.21

6.31

64.88

4.30

3.07

3* 50

4.47

6.72 5 80

4.06

4!67

54.88

Acre-feet

186,500

160,500

240,200

2,471,000

163 f 900

117,000

133,300

170,200

255,900 221 000

154',700

109,300 

178,000

2,090,000

a Ho gage-height record; discharge computed on basts of records for Skykomish River near Gold Bar 

and Cascade River at Marblemount.

461678 O-42-6
76 SKA.GIT RIVER BASIN

Suiattle River near Hansford, Wash.

Location.- Water-stage recorder, lat. 48°21'50", long. 121°29'30", In Ni sec. 10, T. 33 N., 

R. 10 E., 2| miles dovmstream from Big Creek and 4 miles north of Mansford.

Drainage area.- 335 square miles.

Records available.- July 1938 to September 1941.

Extremes.- Maximum discharge during year, 4,980 second-feet Oct. 18, 19; maximum gage 

height, 7.83 feet Oct. 18; minimum discharge, 562 second-feet Feb. 25.

1938-41: Maximum discharge, 9,680 second-feet Hay 29, 1939 (gage height, 9.79 feet), 

from rating curve extended above 5,000 second-feet; minimum, 444 second-feet Oct. 8, 9, 

1939 (gage height, 3.41 feet).

Remarks.- Records fair. No diversion or regulation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

926 

625 

786 

799 

812

761 

799 

832 

846 

2,640

2,400 

1,060 

1,260 

879 

799

748 

1,010 

3,620 

3,610 

3,670

3,280 

2,130 

1,680 

2,180 

1,780

1,440 

1,220 

1,140 

1,180 

1,220 

1,350

Nov.

1,180 

1,140 

1,060 

948 

872

879 

1,020 

1,020 

948 

812

780 

730 

718 

730 

724

754 

774 

736 

724 

724

711 

670 

687 

767 

799

761 

1,140 

1,460 

2,620 

2,030

Dec.

1,780 

1,880 

2,230 

1,980 

2,180

2,080 

2,230 

2,620 

2,230 

1,980

1,730 

1,530 

1,440 

1,350 

1,260

1,220 

1,180 

1,180 

1,260 

1,780

1,400 

1,530 

1,400 

1,350 

1,260

1,220 

1,220 

1,260 

1,300 

1,220 

1,180

Jan.

l,HO 

1,060 

1,020 

984 

948

914 

914 

859 

879 

948

948 

914 

948 

948 

914

948 

1,340 

2,560 

1,980 

1,730

1,530 

1,400 

1,260 

1,180 

1,260

1,260 

1,140 

1,100 

1,060 

1,060 

1,180

Month

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 194C 

ary

ember .....................

ter year 1940-41 ..........

Feb.

1,530 

1,300 

1,220 

1,140 

1,100

1,060 

1,020 

948 

914 

879

872 

846 

786 

754 

718

693 

676 

658 

636 

625

614 

593 

582 

582 

577

593 

705 

1,060

Secondfoot-days

47,482

28,918 

49,460

566,931

36,326

23,681 

23,988 

38,408 

56,924 

59,560 

46,224 

31,440 

38,610

481,021

liar.

1,060 

1,060 

879 

806 

754

730 

711 

724 

687 

664

664 

658 

641 

619 

630

676 

724 

774 

724 

647

614 

630 

604 

577

593

724 

846 

948 

1,100 

1,220 

1,300

Maximum

3,670 

2,620 

2,620

4,800

2,560 

1,530 

1,300 

2,180 

2,790 

2,970 

1,930 

1,530 

2,400

3,670

Apr.

1,350 

1,680 

1,350 

1,180 

1,100

1,020 

948 

948 

1,060 

1,100

1,020 

948 

914 

984 

1,180

1,020 

946 

914 

914 

1,020

1,220 

1,400 

1,530 

1,580 

1,680

1,780 

1,730 

1,730 

1,980 

2,180

May

2,230 

1,930 

1,730 

1,480 

1,400

1,260 

1,180 

1,060 

984 

1,060

1,630 

2,790 

2,340 

1,880 

1,630

1,830 

2,280 

1,830 

1,630 

1,630

1,730 

1,930 

2,340 

2,730 

2,560

2,230 

1,980 

1,830 

1,730 

1,680 

2,400

Minimum

625

670 

1,180

588

859 

577 

577 

914 

984 

1,480 

984 

767 

786

577

June

2,180 

2,080 

1,980 

1,930 

2,130

2,340 

2,670 

2,080 

1,880 

1,930

2,500 

2,970 

2,730 

2,280 

2,130

1,880 

1,880 

1,930 

1,780 

1,580

1,530 

1,830 

1,830 

1.P80 

1,560

1,480 

1,530 

1,530 

1,930 

1,780

Mean

1,532 

964 

1,595

1,549

1,172 

846 

774 

1,280 

1.S56 

1,985 

1,491 

1,014 

1,287

1,318

July

1,780 

1,780 

1,830 

1,780 

1,730

1,780 

1,880 

1,630 

1,530 

1,440

1,480 

1,480 

1,580 

1,680 

1,780

1,880 

1,930 

1,880 

1,730 

1,480

1,400 

1,180 

1,060 

1,020 

1,020

1,100 

1,140 

1,140 

1,060 

1,060 

984

Per 

square 

mile

4.57 

2.88 

4.76

4.62

3.50 

2.53 

2.31 

3.82 

5.48 

5.93 

4.45 

3.03 

3.84

3.93

Aug.

879 

806 

793 

767 

799

866 

948 

984 

1,100 

1,060

1,020 

1,530 

1,020 

1,160 

1,060

1,020 

1,060 

1,070 

1,100 

1,110

1,220 

1,060 

1,400 

P48 

948

1,020 

1,020 

948 

872 

832 

1,020

Sept.

1,140 

1,200 

1,700 

1,680 

1,180

1,060 

914 

786 

1,020 

1,930

1,180 

1,180 

1,700 

2,400 

1,730

1,930 

1,730 

1,300 

1,140 

1,140

1,020 

948 

948 

948 

948

1,440 

1,140 

984 

984 

1,210

Runoff

Inches

5.27 

3.21 

5.49

62.94

4.03 

2.63 

2.66 

4.26 

6.32 

6.61 

5.13 

3.49 

4.29

53.39

Peak discharge.- Oct. 18 (9:15 a.m.) 4.980 see. -ft.; Oct. 19 (6:15 p.m.) 4,980 sec. -ft

Acre- feet

94,180 

57,360 

98,100

1,124,000

72,050 

46,970 

47,580 

76,180 

112,900 

118,100 

91,680 

62,360 

76,580

954,000

; Oct. 20

(7830 p.m.) 4,670 sec.-ft.
WHATCOM CREEK BASIN 77

Whatcom Creek near Bellingham, Wash.

Location.- Water-stage recorder, lat. 48°45'10", long. 122°25 I 40", in NWiSEi sec. 28, T.

38 N., R. 3 E., in Whatcom Falls State Park, three-quarters of a mile downstream from

Lake Whatcom and 2 miles east of Belllngham. Datum of gage is 200.00 feet above mean

sea level (city of Bellingham datum). 

Drainage area.- 50 square miles. 

Records available.- November 1910 to September 1914 (gage heights only October 1912 to

septenber 1914), July 1939 to September 1941. 

Extremes (regulated).- Maximum discharge during year, 473 second-feet Jan. 23 (gage height,

88.08 reet); minimum, 0.4 second-foot Jan. 13, 14; minimum gage height, 84.81 feet Jan.

14; minimum daily discharge, 0.4 second-foot Jan. 13.

1910-12, 1939-41: Maximum discharge observed, 739 second-feet Nov. 20, 21, 1911

(gage height, 5.50 feet, site and datum then in use); minimum discharge, that of Jan.

13, 14, 1941; minimum daily ^discharge, that of Jan. 13, 1941. 

Remarks.- Records excellent except those below 10 second-feet, which are fair. Flow regulatea by Lake Whatcom (usable capacity, about 28,800 acre-feet). The city of Bellingham diverts about 30 second-feet from lake for municipal supply. 

Cooperation.- Gage-height record collected in cooperation with the city of Bellingham.

Rating table, water year 1940-41 (gage height, In feet, and discharge, 

In second-feet)

84.9 0.9 S5.4 11 86.6 

85.0 2.0 85.6 18 87.0 

85.1 3.5 85.8 27 87.4 

85.2 5.4 86.0 40 87.8 

85.3 7.8 86.3 70

Discharge, in second feet, water year October 1940

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

3.5 

3.3 

3.3 

3.3

3.1

3.0 

2.8 

2.8 

2.6 

2.5

2.4 

2.4 

2.4 

2.4 

2.4

2.2

2.2 

2.2 

2.2 

2.2

2.2 

2.2 

2.1 

l.f

l.£

l.E 

1.7 

1.7 

1.6 

1.6 

1.6

Nov.

1.7 

1.7 

1.7 

1.6 

1.6

1.6 

1.6 

1.5 

1.5 

1.4

1.4 

1.4 

1.4 

1.4 

6.9

1.5 

1.6 

16 

38 

38

46 

1.0 

.9 

1.0 

.9

.9 

.7 

.7 

.7 

.7

Dec.

0.7 

.7 

.S 

.8 

.8

.8 

.8 

.9 

.9 

.9

.9 

.8 

.8 

.8 

.8

.8 

.8 

.8 

.8 

.8

-8 

.9 

.9 

.9 

.9

.8 

.8 

.8 

.9 

.9 

.8

Jan.

0.8 

.S 

.8 

.8 

.8

.e

.8 

.8 

.8 

.8

.8 

.6 

.4 

.6 

.8

1.1 

1.7 

1.7 

138 

353

383 

398 

369 

369

369 

369 

355 

325 

302 

300

Feb.

297 

292 

290 

230

161

79 

42 

42 

42 

42

42 

42 

42

42 

17

2.6 

2.6 

2.4

2.2

2.2 

2.4 

2.2 

2.1 

2.2

2.6 

2.4 

2.2

Month

Goto 

Nove 

Deoe

Ca

Janu 

Febr 

Marc 

Apri 

Hay.

June 

July 

Augu 

Sept

Wa

mber. ......... ........................

lendar year 1940 

ary

h. ......... ...........................

ember. ................. ..............

ter year 1940-41 ......................

Mar.

2.8 

2-0 

2.0 

2.1

2.1

2.1 

2.0 

2.4 

2.2 

2.0

1.8 

2.0 

1.8 

1.8 

2.2

2.0 

2.2 

2.1

2.0

2.1 

2.4 

3.0 

2.1 

2.1

2.1 

2.0 

2.1 

2.0 

2.0 

2.0

Apr.

Seoondfoot-days

73.3 

177.0 

25.6

22,171.5

4,443.7 

1,732.5 

65.0 

375.7 

57.2 

68.0 

61.9 

49.2 

97.4

7,226.5

2.2 

2.2 

2.0 

2.0 

6.6

20 

20 

36 

45 

45

45 

44 

44 

18 

3.1

2.8 

2.2 

2.0

2.1

2.1 

2.0 

3.5 

9.9 

2.1

2.0 

2.0 

2.0 

2.0 

1.8

113 

187 

277 

383

to September 1941

May

1. 

1. 

1. 

1.

1.

1. 

1. 

1. 

1. 

1.

1. 

1.

1. 

1. 

1.

1. 

1. 

1.

8 

7 

7 

8 

7

7 

5 

6

5

5

e

6 

4 

4

4

4 

5 

4

3.8

2.8 

2.2 

2.1 

2.2 

2.2

2.1 

2.1 

2.2 

2.1 

2.0 

2.1

MaximuB

3.5 

46 

.9

383

398 

297 

3.0 

45 

3.8 

4.5 

12 

7.8 

34

398

June

2.1 

2.1 

2.2 

2.4 

2.4

2.4 

2.5 

2.4 

2.4 

2.1

3.4 

3.8

4.5

2.1

1.7 

1.5 

1.5

1.4

1.5 

1.5 

1.5 

3.2 

2.4

3.1 

2.4 

2.2 

2.1 

2.2

MinimuB

1.6 

.7 

.7

.7

.4

2.1 

1.8 

1.8 

1.2 

1.4 

1.2 

1.1 

.8

.4

July

2.1 

2.0 

2.0 

1.8 

1.7

1.7 

1.7 

1.6 

1.5 

1.5

1.5 

1.5

1.5 

1.5

12 

6.1 

1.6 

1.6 

1.5

1.6 

1.4 

1.3 

1.3 

1.2

1.2 

1.2 

1.2 

1.2 

1.2 

1.2

Aug.

1.3 

1.3 

1.4 

1.4 

1.4

1.3 

1.3 

1.3 

1.2 

1.3

1.5 

1.4

1.4 

1.3

1.3 

1.3 

1.3 

1.4 

1.4

1.3 

1.4 

1.6 

1.4 

1.5

2.5 

7.8 

1.2

1.1 

1.1 

1.4

-» aol

Sept.

1.2 

1.2 

1.3 

1.2 1.1"

1.1 

1.1 

1.1 

1.1 

1.2

1.1 

1.1

.8 

.8

.8 

1.1 

1.4 

1.2 

1.2

1.0 

.9 

1.0 

.8 

.9

8.9 

34 

26 

.9 

1.0

off in 

e-feet

2.36 145 

5.90 351 

.83 51

60.6 43,970

143 8,810 

61.9 3,440 

2.10 129 

12.5 745 

1.85 113 

2.27 135 

2.00 123 

1.59 98 

3.25 193

19.8 14,330
78 NOOKSACK RIVER BASIN

Nooksack River above Cascade Creek, near Glacier, Wash.

Location.- Water-stage recorder, lat. 48°54'20", long. 121°50'50", in NWi sec. 1, T. 39 

N., R. 7 E., a quarter of a mile upstream from Cascade Creek, 4i miles east of Glacier, 

and 6 miles upstream from Glacier Creek.

Drainage area.- 105 square miles.

Records available.- October 1937 to September 1941.

Extremes.- Maximum discharge during year, 6,300 second-feet Oct. 19 (gage height, 8.32 

reet;, from rating curve extended above 2,000 second-feet; minimum not determined, 

probably occurred during period of doubtful gage-height record.

1937-41: Maximum discharge, 9,670 second-feet Oct. 28. 1937 (gage height, 10.28 

feet), froin rating curve extended above 2,000 second-feet, minimum recorded, 85 secondfeet (regulated) Mar. 30, 1938 (gage height, 2.34 feet).

Remarks.- Records fair except those for periods of doubtful gage-height record, which are 

poor. No diversion. Some regulation at low water by power plant at Excelsior.

Discharge, in second- feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24

25

26

27 

28 

29 

30 

31

Oct.

366 

256 

248 

221 

196

178 

229 

214 

297 

1,940

721 

282 

307 

209 

177

d!68 

1,120 

4,110 

4,870 

3,870

2,800 

1,020 

1,080 

2,380 

1,120

700 

610 

553 

648 

587 

564

Nov.

559

542 

493 

415 

376

361 

775 

d680 

d600 

d520

d460 

d400 

3360 

d340 

d370

d400 

d430 

d390 

d370 

d330

d310 

d290 

d270 

d260 

d260

268 

306 

306 

381 

342

Dec.

366 

542 

832 

616 

995

925 

940 

1,860 

1,150 

d930

d750 

d600 

d540 

d500 

d470

d440 

d410 

d410 

d500 

1,050

669 

859 

651 

675 

640

d500 

d500 

d500 

d500 

d470 

d430

Jan.

d410 

d390 

d380 

d360 

d340

dSSO 

dSOO 

250 

360 

391

400 

391 

445 

414 

386

386 

755 

1,380 

696 

528

470 

409 

312 

280 

432

355 

280 

280 

265 

319 

587

Month

Octo 

Hove 

Deoe

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 194( 

ary

ember .....................

ter year 1940-41 ..........

Feb.

1,030 

642 

539 

517 

512

485 

475 

460 

450 

422

427 

409 

382 

355 

335

dSSO 

d320 

d310 

dSOO 

dSOO

d290 

d280 

d280 

d270 

d260

d260 

362 

619

Second 

foot-days

31,341 

12,164 

21,220

253,655

13,281 

11,621 

10,912 

16,322 

27,310 

26,795 

24,371 

14,667 

18,746

228,750

Mar.

592

574 

444 

379 

335

317 

305 

329 

305 

285

280 

280 

280 

270 

270

285 

300 

311 

323 

295

265 

300 

255 

168 

215

353 

421 

452 

494 

a570 

a660

Maximum

4,870 

775 

1,860

4,870

1,380 

1,030 

660 

900 

1,800 

1,580 

1,300 

1,140 

1,410

4,870

Apr.

a700 

a730 

a610 

a560 

a510

469 

452 

452 

512 

512

452 

435 

428 

444 

520

444 

400 

372 

365 

400

460 

520 

583 

601 

628

691 

710 

682 

780 

900

May

1,110 

838 

752 

682 

675

610 

52S 

475 

436 

485

801 

1,740 

1,180 

868 

724

1,140 

1,800 

985 

730 

678

667 

790 

1,170 

1,250 

1,060

852 

820 

820 

724 

790 

1,130

Minimum

168 

260 

366

168

250 

260 

168 

365 

436 

678 

515 

304 

316

168

June

950 

820 

760 

760 

S52

1,060 

1,170 

760 

712 

905

1,260 

1,580 

1,340 

950 

852

754 

820 

1,130 

950 

790

760 

918 

852 

748 

678

684 

748 

736 

742 

754

Mean

1,011 

405 

685

693

428 

415 

352 

544 

881 

893 

786 

473 

625

627

July

820 

852 

S20 

790 

820

885 

918 

790 

724 

700

694 

706 

820 

950 

1,090

1,250 

1,300 

1,130 

950 

760

689 

601 

555 

601 

596

634 

640 

606 

585 

580 

515

Per 

square 

mile

9.63 

3.86 

6.52

6.60

4.08 

3.95 

3.35 

5.18 

8.39 

8.50 

7.49 

4.50 

5.95

5.97

Aug.

432 

364 

427 

432 

380

458 

545 

590 

623 

575

570 

570 

486 

450 

486

436 

481 

510 

490 

500

510 

458 

514 

316 

322

339 

342 

310 

304 

307 

1,140

Sept.

681 

515 

813 

662 

a590

a510 

a 4,50 

a 4,00 

a360 

1,170

684 

a820 

al,120 

al,410 

al,070

al,200 

736 

606 

570 

555

432 

376 

384 

384 

368

605 

325 

316 

316 

418

Runoff

Inches

11.10 

4.31 

7.52

89.86

4.70 

4.13 

3.36 

5.78 

9.67 

9.49 

8.63 

5.19 

6.64

81.01

Ao re-feet

62,160 

24,130 

42,090

503,100

26,340 

23,050 

21,640 

32,370 

54,170 

53,150 

48,340 

29,090 

37,180

453,700

Peak discharge.- Oct. 18 (5 a.m.) 5,850 sec.-ft.; Oct. 19 (9:40 a.m.) 6,300 sec.-ft.; Oct. 

(6:40 p.m.J 5,850 sec.-ft.

a No gage-height record.

d Doubtful gage-height record; discharge computed on basis of records for Cascade River at 

Marblemount.

Note.- Shifting-control method used Oct. 1-9, Nov. 26 to Dec. 9, Jan. 8-17, Feb. 6-15.
NOOKSACK RIVER BASIN 79

Nooksack River at Deming, Wash.

Location.- Water-stage recorder, lat. 48°48'35", long. 122°12'15", In lot 12, sec. 6, T. 

38 N., R. 5 E., 800 feet downstream from South Fork and 1 mile southeast of Deming. 

Datum of gage is 203.6 feet above mean sea level, datum of 1929.

Drainage area.- 580 square miles.

Records available.- July 1935 to September 1941. September to December 1910 (gage heights 

only; at site j. 1/8 miles downstream; December 1910 to March 1911 (gage heights only) 

at Nugents' bridge, 4 miles downstream from Deming.

Extremes.- Maximum discharge during year, 15,000 second-feet Jan. 18 (gage height, 9.50 

feet); minimum, 645 second-feet Oct. 9.

1935-41: Maximum discharge, 33,200 second-feet Oct. 28, 1937, corrected, (gage 

height, 13.21 feet), from rating curve extended above 11,000 second-feet; minimum, 560 

second-feet Nov. 9, 10, 1936, but may have been less sometime during periods of ice 

effect.

Remarks.- Records good except those for periods of shifting control, which are fair. No 

diversion. Slight regulation at power plant at Excelsior has little If any effect at 

this station.

Rating table, water year 1940-41, except periods of shifting control (gage height, 

in feet, and discharge, in second-feet)

3.0 

3.5 

4.0 

4,5

7S5 

1,120 

1,510 

2,050

5.0 

5.5 

6.0 

7.0

2,690

3,510

4,470

6,640

13,000

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

3

4

5

6

7

R

9

10

12

14

15

16

18

20

21

25

27 

28 

29 

30

31

Oct.

1,080

850

785

737

725

692

725

708

812

4,970

3,080

1,610

1,660

1,300

1,230

1,050

1,270

8,890

9,690

9,090

6,580

3,600

2,920

4,830

3,510

4,170

1,990 

1,760 

2,290 

2,840

2,620

Nov.

2,690

2,690

2,620

2,170

1,930

2,110

3,080

3,160

2,480

2,050

1.760

1,610

1,510

1,460

1,420

1,420

1,560

1,560

1,380

1,340

1,300

1,230

1,230

2,290

1,990

2,170 

2,420 

3,420 

3,080

Dec.

2,690

3,780

4,170

3,330

5,050

5,220

5,620

3,800

5,820

4,270

3,330

2,760

2,480

2,230

2,050

1,930

1,820

1,930

2,110

4,800

3,420

3,420

2,920

2,920

2,920

2,840

2,840 

3,330 

4,070 

3,330

2,760

Jan.

2,360

2,1K>

1,990

1,930

1,760

1,660

1,610

1,560

1,930

2,290

2,290

2,230

2,480

2,230

2,050

2,420

4,100

11,200

5,940

4,170

3,420

2,920

2,550

2,420

3,380

3,690

2,920 

2,690 

2,480 

2,620

3,950

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

Calendar year 1940 .........

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

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

Water year 1940-41 ..........

Feb.

6,840

4,470

3,420

3,080

2,920

2.62O

2,690

2,360

2,230

2,050

2,170

2,170

1,930

1,820

1,710

1,610

1,560

1,510

1,460

1,420

1,380

1,340

1,300

1,510

1,510

1,930

2,950 

5,110

-

Secondfoot-days

88,064

60,790

109,160

988,244

91,350

67,070

63,960

57,710

97, 190

73,890

57, 720

41,500

83,670

392,074

Mar.

4,270

4,370

3,080

2,620

2,290

2,230

2,170

2,170

1,990

1,820

1,760

1', 710

1,660

1,610

1,510

1,510

1,560

1,660

1,820

1,710

1,560

1,990

1,760

1,610

1,510

1,760

1,990 

1,930 

2,050 

2,170

2,110

9,690

3,420

8,800

9,690

11,200

6,840

4,370

2,480

8,510

3,240

2,690

2,160

6,070

11,200

Apr.

2,110

2,420

1,990

1,760

1,380

2,480

2,050

f 1,680

f 1,880

1,990

1,760

1,660

1,560

1,610

2,110

1,880

1,710

1,610

1,560

1,610

1,660

1,760

1,930

1,880

1,930

2,110

2,170 

2,050 

2,230 

2,480

"

May

2,690

2,360

2,4SO

2,230

2,760

2,4SO

2,230

1,990

1,820

1,820

2,290

4,070

3,420

2,620

2,230

4,360

8,510

f4,890

f3,690

4,680

3,600

3,330

3,600

3,600

3,240

2,760

2,620 

2,760 

2,480 

2,420

3,160

692

1,230

1,820

692

1,560

1,300

1,510

, 1,560

1,820

1,930

1,340

1,050

1,380

692

June

3,080

2,620

2,420

2,290

2,360

2,690

3,240

2,620

2,690

2,360

2,840

3,240

3,000

2,480

2,360

2,050

2,110

2,620

3,240

2,690

2,420

2,420

2,360

2,110

1,930

1,930

1,930 

1,930 

1,930 

1,930

"

2,841

2,026

3,521

2,700

2,947

2,395

2,063

1,924

3,135

2,463

1,862

1,339

2,789

2,444

July

1,990

2,050

2,050

1,930

1,930

1,990

2,110

1,930

1,820

1,710

1,710

1,710

1,880

2,110

2,360

2,620

2,690

2,480

2,290

1,990

1,880

1,510

1,380

1,420

1,560

1,510

1,460 

1,420 

1,380

Per

mile

4.90

3.49

6.07

4.66

5.08

4.13

3.56

3.32

5.41

4.25

3.21

2.31

4.81

4.21

Aug.

1,190

n.,:

fl,-

IfS

L20

L6U

!30

1,160

1,230 i.:

1,'

1,'

54U

120

160

1,420

1,380

1,

1,

1,

3lU

1,340

1,300

1,

440

1,380

1,420

1,

1,

4bU

1,380

1,230 

1,120 

1,050

Sept.

3,220

3,450

3,900

1,820

1,610

3,330

1,710

6,070

4,400

2,760

2,290

1,610 

1,610 

1,970

Runoff

Inches

5.65

3.90

7.00

63.36

5.36

4.30

4.10

3.70

6.23

4.74

3.70

2.66

5.36

57.20

Acre feet

174,700

120,600

216,500

1,960,000

181,200

133,000

126,900

114,500

192,800

146,600

114,500

82, 310

166,000

1,770,000

f Computed on basis of partly estimated gage-height record.

Note.- Shifting-control method used Oct. 1-18, Nov. 4 to Jan. 6, Mar. 11 to June 12.
80 NOOKSACK RIVER BASIN

South Fork of Nooksack River near Wickersham, Wash.

Location.- Water-stage recorder, lat. 48°39'50", long. 122°07'50", in lot 2, sec. 26, T.

 37 N., R. 5 E., three-quarters of a mile upstream from Skookum Creek and 4 miles east 

of Wickersham.

Drainage area.- 103 square miles.

Records available.- May 1934 to September 1941.

Extremes.- Maximum discharge during year, 5,340 second-feet Jan. 18 (gage height, 7.26

 feet); minimum, 66 second-feet Oct. 9 (gage height, 2.11 feet).

1934-41: Maximum discharge, 12,900 second-feet Oct. 23, 1937 (gage height, 10.70 

feet); minimum, that of Oct. 9, 1940.

Remarks.- Records excellent except those for period of faulty gage-height record, which 

are poor. No diversion or regulation.

Rating tables, water year 1940-41 (gage height, In feet, and discharge, In second-feat) 

(Shifting-control method used Dec. 20 to Jan. 8)

Oct. 1 to Jan. 17

2.3 

2.6 

3.0 

3.5 

4.0

100

178

315

560

880

4.5 1,340

5.0 1,860

5.5 2,450

6.0 3,130

2.1 68

2.3 105

2.6 182

3.0 321

Jan. 18 to Sept. 30

3.5 563

4.0 894

4.5 1,340

5.0 1,860

5.5 2,460

6.0 3,140

7.0 4,780

Discharge, in Second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

80

77

74

78

82

75

70

69

85

1,610

622

307

335

229

203

170

267

2,850

2,760

1,860

1,740

828

639

1,240

791

550

437

424

914

1,140

928

Nov.

1,030

936

880

683

562

722

1,080

1,050

756

579

486

418

386

364

355

355

413

396

347

319

288

270

263

442

805

550

671

869

1,390

1,040

-

Dec.

931

1,340

1,440

987

2,100

1,750

1,860

2,720

1,490

987

749

680

534

476

427

396

368

399

597

1,790

880

835

661

709

742

812

798

1,050

1,300

860

646

Jan.

534

461

422

408

373

347

335

319

e390

6580

6560

e540

6660

6670

e700

el, 200

62,450

3,660

62,140

el, 100

e870

6640

6520

e460

el, 700

62,700.

el, 100

6800

6650

6600

el, 600

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ...... ...

Feb.

f2,460

f 1,340

959

797

716

640

735

609

536

487

646

514

432

390

359

338

317

305

286

278

268

250

260

355

359

519

1,190

1,880

_

_

-

Secondfoot-days

21,534

18, 704

31,232

220,154

29,389

18,125

17,796

13,581

22,072

10, 778

4,349

3,211

22,022

212,793

Mar.

1,540

1,580

959

748

621

640

609

580

508

456

427

418

399

372

363

368

376

446

530

451

394

621

482

408

390

503

541

519

552

552

503

Maximum

2,850

1,390

2,720

3,400

3,660

2,460

1,540

818

2,720

792

226

514

2,150

3,660

Apr.

519

627

461

408

554

818

575

487

508

514

442

394

363

372

558

451

404

368

350

3 C9

386

408

413

390

404

432

413

368

413

422

-

May

418

363

524

450

826

735

680

446

394

390

472

812

546

432

390

1,950

2,720

1,240

894

1,240

833

709

696

646

541

472

456

482

427

408

580

Minimum

69

263

368

67

319

250

363

350

363

, 239

91

71

230

69

June

498

413

372

342

342

386

432

376

329

355

338

368

329

282

271

250

271

415

792

633

456

381

329

294

278

268

250

843

239

246

-

Mean

695

623

1,007

602

948

647

574

453

712

359

140

104

734

583

July

226

216

210

198

191

182

176

168

160

151

146

144

138

131

131

126

126

126

121

119

123

114

114

116

116

103

99

97

97

93

91

Per 

square 

mile

6.75

6.06

9.78

5.84

9.20

6.28

5.57

4.40

6.91

3.49

1.36

1.01

7.13

5.66

Aug.

1

89

89

95

03

93

89

85

83

82

80

80

87

85

83

80

78

75

75

73

71

71

71

LOS

91

85

128

L31

L16

L23

L01

514

Sept.

880

338

965

1,320

524

350

275

230

301

1,010

896

748

1,490

2,150

1,170

654

902

1,120

1,340

871

677

536

456

399

355

497

350

321

325

672

"

Runoff

Inches

7.7S

6.75

11.28

79.49

10.61

6.54

6.43

4.90

7.97

3.89

1.57

1.16

7.95

76.83

Acre-feet

42,710

37,100

61,950

436,700

58,290

35,950

35,300

26,940

43,780

21,380

8,630

6,370

43,680

422, 100

9 Gage-height record faulty; discharge computed on basis of records for North and South Porks of 

Stillaguamlsh River.

f Computed on bcsls of partly estimated gage-height record.
UPPER COLUMBIA RIVER BASIN 81

COLUMBIA RIVER MAIN STEM

Columbia River at Birchbank, British Columbia 

(International gaging station)

Location.- Water-stage recorder, lat. 49°10', long. 117°43', at Birchbank, British

Columbia, 7 miles upstream from Trail, 11 miles downstream from Kootenai River, and 17

miles upstream from international boundary. Datum of gage is 1,338.00 feet above mean

sea level (levels by Geodetic Survey of Canada in 1930). 

Drainage area.- 34,000 square miles. 

Recoras available.- October 1937 to September 1941. April 1913 to September 1937 at site

at Trail, 7 miles downstream, published as Columbia River at Trail, British Columbia. 

Average discharge.- 28 years, 70,020 second-feet. 

Extremes.- Maximum discharge during year, 153,000 second-feet June 19 (gage height, 29.10

feet); minimum, 16,400 second-feet Feb. 27 (gage height, 5.41 feet).

1913-41: Maximum discharge observed, 312,000 second-feet June 14, 15, 1913 (gage

height, 41.6 feet, site and datum then in use); minimum observed. 8,940 second-feet

Feb. 3, 1937 (gage height, 6.27 feet, site and datum then in use).

Remarks.- Records excellent. Small amount of water diverted above station for irrigation. 

~"Slight fluctuation at low water caused by power plant on Kootenal River. Flow affected

by natural storage in numerous lakes and by artificial regulation in Kootenai River

Basin. 

Cooperation.- This station Is one of the international gaging stations maintained by

Canada under agreement with the United States.

Rating table, water year 1940-41 (gage height, In feet, and discharge, 

In second-feet)

6.0

8.0

10.0

18,700

26,900

36,100

12.0

15.0

18.0

45,800

60,800

77,100

21.0

24.0

27.0

95,000

114,000

136,000

Discharge, In second-feet, water year October 1940 to September 1941

Day

1 

2 

3

4 

6

6

7 

8 

9 

10

11 

12 

13 

14 

16

16

17 

18 

19 

20

21 

22

23 

24 

25

26

27 

28 

29 

30 

31

Oct.

49,900 

49,900 

49,300 

48, 400 

47,600

46,600 

45, 400 

44,400 

43,000 

41,600

41,700 

40.300 

40, 200 

38,800 

38,000

37,000 

36,100 

35,100 

35,300 

37,400

42,200 

48, 300 

54, 200 

59,800 

65,600

67,200 

67, 200 

64, 200 

61,300 

59,200 

58,200

Hov.

55,200 

52,800 

50,000 

47, 300 

44,900

43,200 

41,800 

41,000 

40, 300 

38, 400

36,800 

35, 600 

34,100 

32,500 

31,900

31,000 

30,100 

29,500 

28,500 

27,600

27,200 

26,500 

25,900 

25,300 

25, 100

25,000 

24,900 

24,500 

24, 400 

23,800

Dec.

23,600 

23,600 

23,300 

22,600 

22,500

22, 700 

22,500 

22,500 

22,600 

22,400

22,200 

22,100 

22,200 

21,900 

21,500

21,400 

21,000 

20,700 

20, 200 

20,000

20,100 

20,000 

20, 100 

19,900 

19,700

19,700 

19,900 

19,600 

19,700 

19,700 

19,500

Jan.

19, 100 

19, 200 

19,100 

19,200 

19,000

IS, 900 

18, 800 

19,000 

18,700 

18,600

18,400 

18,300 

17,500 

17,600 

18, 100

18,100 

18,100 

17,700 

17,800 

18,000

17,700 

17,700 

17,600 

17,500 

17,400

17,500 

17,500 

17,500 

17,200 

17, 10O 

17,200

Month

Oot 

Nov 

Dec

C

Jan

Pet 

Kar 

Apr 

K«y 

Jun 

Jul 

Aug 

Sep

V

ember . ....................

 ter year 1940-4

Feb.

17,300 

17,200 

17,200 

17,200 

17,200

17,400 

17,500 

17,500 

17,700 

' 17, 500

17,600 

17,600 

17,600 

17,500 

17,600

17 , 600 

17,700 

17,500 

17,200 

17,200

17, 100 

17,300 

17,200 

17, 100 

16,800

16,700 

16,800 

17,200

Secondfoot-daya

1,493,400 

1,025,100 

659,400

23,857,700

561, 1GO 

485, 000 

669,800 

1,364,000 

3,064,600 

4,069,000 

3,350,000 

2,454,500 

1,964,000

21,159,900

Mar.

17, 500 

17,800 

16,800 

17,900 

18,000

18,000 

18,000 

18,700 

18,700 

18,700

IS, 400 

18,400 

18, 600 

18,700 

20,800

22,900 

22,700 

21,000 

22,200 

23,600

23,200 

22,900 

21,900 

21,900 

23, 400

25,800 

27,600 

27, 800 

28,000 

29,400 

30,500

Maximum

67,200 

55,200 

23,600

196,000

19,200 

17,700 

30,500 

63,300 

114,000 

152,000 

128,000 

92,100 

70,900

152,000

Apr.

31,400 

32,400 

33,300 

33,900 

31,800

37,000 

37,100 

37,600 

38.400 

39,400

40,400 

41 , 800 

42,900 

43,900 

45,200

46,200 

47,200 

48,600 

49,400 

49,800

50,400 

51,400 

52,400 

53,600 

54,900

56,200 

55,800 

58,000 

60, 300 

63,300

May

68,000 

74,600 

79,000 

83,500 

87,600

90,100 

91,900 

92,400 

90,900 

90,700

89,400 

89,500 

91,900 

95,600 

97,300

99,200 

106,000 

110,000 

111,000 

113,000

114,000 

113,000 

111,000 

110,000

110,000

109,000 

109,000 

109,000 

109,000 

109,000 

110, OOC

Minimum

35, 100 

23,800 

19,500

18,700

17,100 

16,700 

16,800 

31,400 

68,000 

112,000 

92,300 

68,OOO 

59 , 000

16,700

Juno

112,000 

114,000 

117,000 

120,000 

123,000

126,000 

128,000 

131,000 

134,000 

135,000

136,000 

137,000 

139,000 

143,000 

146,000

149,000 

151,000 

152,000 

152,000 

152,000

149,000 

145, 000 

141, OOQ 

137,000 

135,000

135,000 

134,000 

134,000 

132>OOC

130,000

Mean

48, 200 

34,200 

21,300

65,200

18,100 

17, 300 

21,600 

45,500 

93,900 

136,000 

108,000 

79,200 

65,500

58,000

July

128,000 

125,000 

120,000 

112,000 

102,000

99,600 

103,000 

116,000 

115,000 

114,000

113,000 

111,000 

108,000 

105,000 

97,700

97,400 

102,000 

106,000 

110,000 

115,000

117,000 

115,000 

112,000 

108,000 

106,000

104,000 

102,000 

101,000 

98,500 

94,500 

92,300

Per 

square 

mile

1.42 

1.01 

.63

1.92

.53

.51 

.64 

1,34 

2.91 

4.00 

3.18 

2.33 

1.93

1.70

Aug.

91,400 

92, 100 

91,800 

88,800 

86,600

83,500 

80,200 

77, 100 

75,200 

74,900

75,700 

76,800 

77,600 

81,200 

79 , 700

77,200 

78,300 

80,400 

78,600 

76,000

74,900 

76,400 

79,100 

79,900 

79,300

77,400 

77,200 

75,700 

73,300 

70.2OO 

68,000

Sept.

66,600 

67,000 

67,800 

67, 400 

67,700

67,900 

67,900 

67,700 

67,200 

66,900

66,900 

66,300 

65,500 

65,800 

68,000

67,300 

68,600 

69,700 

70,900 

68,500

66,800 

64, 400 

62,000 

60,600 

60, 400

59,600 

59,000 

59,400 

60,800 

59,400

Run-off

Inches

1.64 

1.13 

.73

26.10

.61 

.53 

.74 

1.50 

3.36 

4.46 

3.67 

2.69 

2.15

23.21

Acre-feet

2,962,000 

2,033,000 

1,308,000

47,360,000

1,113,000 

962,000 

1,329,000 

2,705,000 

6,079,000 

8,071,000 

6,646,000 

4,868,000 

3,896,000

41,970,000
82 COLUMBIA RIVER MAIN STEM

Columbia River at International boundary 

(International gaging station)

Location.- Water-stage recorder, lat. 49°00'0b", long. 117°37'40", In SEj &ec. 4, T. 40 N., 

mm., at the International boundary, hair a mile downstream from Pend Orellle River. 

Datum of gage Is at mean sea level (Bureau of Reclamation 1937 datum).

Drainage area.- 59,700 square miles.

Records available.- March 1938 to September 1941.

Extremes.- Maximum discharge during year, 185,400 second-feet June 19 (elevation, 1,312.33 

feet); minimum, 25,400 second-feet Dec. 19 (elevation, 1,291.00 feet).

1938-41: Maximum discharge, 334,400 second-feet (revised) June 27, 28, 1938 (elevation, 1,324.00 feet); minimum observed, 21,500 second-feet (revised) Feb. 10, 193$ 

(elevation, 1,290.12 feet).

Flow of about 12,900 second-feet occurred January 30 or 31, 1937 (revised), based 

on Information from other gaging stations (elevation, 1,287.9 feet (revised), from 

rating curve extended below 1,291.6 feet); may have been as low sometime during January 

1930.

Remarks.- Records excellent. Many diversions above gage for Irrigation but quantity very 

small percentage or rlow past gage. Some fluctuation at low stage caused by power plant 

on Kootenal River. Flow affected by natural storage In several lakes and by artificial 

regulation In Kootenal and Pend Orellle River Basins.

Cooperation.- This Is one or the International gaging stations maintained by the United 

States under agreement with Canada.

Rating table, water year 1940-41 (gage height, in feet, and discharge, 

in second-feet)

1.292

1.293

1.294

1,296

30,000 

34,700 

39,500 

49,50O

1,298

1,300

1,302

1,304

60,4OO

72,600

86, 800

102,300

1,306 120,000

1,308 139,000

1,310 159,500

Discharge, In second-feet, water year October 194O to September 1941

Day

1 

2 

5 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

16

16 

17 

18 

19 

2O

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

57,700 

57,700 

57,000 

56, 300 

55, 600

54,700 

53, 800 

52,700 

51,400 

50, 300

50,500 

49,100 

49,000 

48, 100 

47,300

46,400 

45,400 

44, 600 

44,400 

46,900

a51,400 

55,900 

62,100 

67,200 

75,000

76,700 

77,200 

74,000 

70,800 

68,200 

67,500

Hov.

64,700 

62, 800 

59,500 

57, 100 

54,700

53,200 

51,800 

51, 100 

50, 60& 

48,700

47, 100 

45, 600 

44, 400 

42,900 

42,000

41,200 

40,000 

39,500 

38,300 

37, 200

37,000 

36, 200 

35,600 

34,700 

34, 600

34, 400 

34, 200 

33,900 

33,900 

33,300

Dec.

33, 10O 

33, 100 

33,000 

32,400 

32,300

32,600 

32, 100 

32,200 

32, 200 

31,700

31,300 

30,900 

30, SOO 

30, 300 

29,500

29,100 

26, 400 

27,800 

26, 300 

25,800

27,700 

28,800 

29,400 

29,200 

29,200

29,200 

29,900 

29,700 

29,900 

30, 100 

30,100

Jan.

29,800 

29,700 

29,200 

29,800 

29,600

29,700 

29,200 

29,500 

29,200 

28,900

28,700 

28,500 

28,000 

27, 600 

28, 400

28, 400 

28,300 

28,500 

28,400 

29,100

28,700 

28,700 

28, 900 

28,600 

28,600

29,000 

29,000 

29,200 

29,000 

28, 700 

28, 700

Month

Dot 

HOT 

Dec

C

Jan 

Feb 

Mar 

Apr 

May 

Jun 

Jul 

Aug 

Sep

Water year 1940-4

Feb.

28,900 

28, 800 

28, 600 

28, 400 

28, 400

28,700 

29,200 

29,100 

29,200 

29,200

29,300 

29,400 

29,400 

29,000 

29,000

28,900 

28,800 

28, 600 

28,300 

28,200

28,000 

28, 000 

27,800 

27,900 

28,000

27, 400 

27, 300 

28,500

Secondfoot-days

1,764,900 

1, 320, 200 

938,100

29,956,400

895,600 

800,300 

1,117,900 

1,908,900 

3,898,300 

4,978,900 

3,920,000 

2, 703, 600 

2,267,700

26,514,400

Mar.

29,600 

31,300 

31,300 

31,900 

a31,900

a31, SOO 

a31,900 

a32,000 

«32,400 

32,800

32,800 

32,800 

32,900 

32, 800 

34, 300

37,000 

37,200 

35,800 

36, 400 

38,500

38,200 

37, 800 

36,600 

36, 600 

37, 600

40, 600 

42,700 

43, 400 

43,700 

45, 600 

47,700

 Maximum

77,200 

64,700 

33, 100

247, 200

29,800 

29,400 

47,700 

83,600 

144, 100 

184, 600 

153,600 

101,600 

82, 100

184,600

Apr.

49,500 

50,900 

51,200 

51,600 

49,100

54,100 

53,800 

54,700 

55, 300 

56,300

57,700 

59,200 

60,700 

61,800 

63, 400

64,000 

64,900 

66, 400 

67, 500 

67,800

68, 800 

69,900 

71,300 

72,600 

74,000

75,700 

75, 600 

77,600 

79,900 

83,600

May

89,600 

98,300 

103,000 

107,300 

111,600

114,300 

116,000 

117, 100 

115,300 

114,800

113, 400 

114,200 

117,100 

120, 800 

122,700

124,200 

134,300 

141,000 

142,000 

143,300

144, 100 

143,300 

142,000 

140,500 

139,600

138,900 

137, 600 

136,900 

137,100 

137,700 

140,300

Minimum

44, 400 

33,300 

25,800

25,500

27,600 

27,300 

29,600 

49,100 

89,600 

142,700 

101,600 

76, 300 

70,200

25,800

June

142,700 

144,300 

146,300 

149,600 

152, 600

155,900 

159,200 

162,800 

166,300 

167,600

169,000 

170, SOO 

172, 600 

175,600 

177,500

180, 200 

181,700 

183, 200 

184,600 

183,600

180, 100 

175,600 

170,500 

166,000 

162,900

162,800 

161, 800 

160,000 

157,800 

155,800

Mean

56,930 

44,010 

30,260

81,850

28,890 

28,580 

36,060 

63, 630 

125,800 

166,000 

126,500 

87,210 

75,590

72, 640

July

153,600 

150, 400 

146,200 

138,100 

125,600

123, 200 

125,700 

139,700 

137,000 

135,400

134,300 

131,900 

127, 800 

125,300 

115,000

114,000 

118,800 

127,300 

126, 800 

131,000

132, 600 

129,900 

126, 800 

122,200 

120,200

116,600 

114, 100 

113,700 

110,100 

104,600 

101,600

Per 

square 

mile

0.954 

.737 

.507

1.37

.484 

.479 

.604 

1.07 

2.11 

2.78 

2.12 

1.46 

1.27

1.22

Aug.

101, 

101, 

101, 

97, 

94,

92, 

88, 

85, 

82, 

81,

83, 

84, 

85, 

89, 

88,

85', 

86, 

88, 

86, 

83,

81, 

83, 

86, 

87, 

87,

85, 

85, 

83, 

81, 

78, 

76,

000 

600 

100 

100 

800

200 

700 

200 

300 

900

400 

700 

400 

400 

500

200 

000 

300 

500 

600

400 

600 

600 

500 

000

000 

000 

800 

800 

700 

300

Sept.

74,800 

75,200 

76, 100 

76,000 

76,400

76, 600 

76, 500 

76,100 

75,900 

75,900

76, 700 

75,900 

75,000 

75,900 

78,300

77, 600 

79,000 

80,300 

82, 100 

80,500

78,800 

76,500 

73,900 

71,900 

71,700

71,000 

70,200 

70,600 

71,700 

70,600

Run-off

Inches

1.10 

.82 

.58

18.65

.56 

.50 

.70 

1.19 

2.43 

3.10 

2.44 

1.68 

1.41

16.51

Acre-feet

3,501,000 

2,619,000 

1,861,000

59,410,000

1,776,000 

1,587,000 

2,217,000 

3,786,000 

7,732,000 

9,876,000 

7,775,000 

5,363,000 

4,498,000

52,590,000

a No gage-height record; discharge interpolated or computed on basis of staff-gage readings at 

cable gage.
COLUMBIA RIVER MAIN STEM 83

Columbia River at Kettle Falls, Wash.

Location.- Water-stage recorder, lat. 48°37 I 20", long. 118 007'00", in northwest corner lot 

1, sec. 14, T. 36 N., R. 37 E., at Kettle Falls, 3i miles upstream from Colville River. 

Datum of gage is at mean sea level, subject to correction to datum of 1929.

Drainage area.- 64,500 square miles.

Records available.- April 1913 to June 1941 (discontinued).

Average discharge.- 27 years, 98,750 second-feet.

Extremes.- Maximum daily discharge during period, 183,000 second-feet June 9; minimum 

discharge, 26,500 second-feet Dec. 20 (elevation, 1,167.71 feet).

1913-41: Maximum discharge, 468,000 second-feet June 14, 15, 1913 (gage height, 

34.2 feet, from floodmarks, referred to U. S. Weather Bureau gage at Marcus); minimum, 

13,000 second-feet (estimated because of ice effect) Jan. 18-21, 1930. Jan. 31, 1937.

Maximum discharge known, 700,000 second-feet during flood of 1894 (based on 

information from several sources).

Remarks.- Records excellent except those for periods of no gage-height record, which are 

good. Many diversions above gage for irrigation, but quantity diverted is very small 

percentage of flow past gage. Slight fluctuation at extrene low water caused by power 

plant on Kootenai River. Flow affected by natural storage in many lakes and by 

artificial regulation in Kootenai and Pend Oreille River Basins.

Rating table, Oct. 1, 1940, to June 9, 1941 (elevation, In feet, and 

discharge, in second-feet)

1,163.0 27,900

1,169.0 32,700

1,170.0 33,100

1,171.0 44,400

1,172.0

1,173.0

1,174.0

1,175.0

51,200

53,000

65,200

73,400

1,176.0

1,173.0

1,180.0

1,132.0

32,300

101,600

123,000

146,500

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

1

8

&

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

53,300

53,400

53,000

57,300

56,600

55,300

55,000

54,000

53,100

51,600

51,400

50,700

50,100

49,700

43,600

47,300

46,400

45,400

44,900

45,900

49,500

55,000

61,000

65,600

73,700

77,200

73,100

76,700

73,400

70,200

69,500

Nov.

66,900

64,900

62,000

59,400

56,300

55,000

53,900

52,300

52,200

50,900

49,000

47,100

45,600

44,300

43,000

42,400

41,500

40,400

39,400

33,100

37,300

37,200

36,300

35,800

35,000

35,100

35,000

34,700

34,500

34,100

Dec.

33,700

33,400

33,600

33,300

32,300

33,100

32,900

32,700

32,300

32,400

31,900

31,400

31,300

31,000

30,400

29,700

29,400

29,400

23,100

26,«00

23,000

29,700

30,200

30,600

30,500

30,400

30,900

31,200

30,900

31,200

31,300

Jan.

31,000

30,700

30,700

30,500

30,900

30,500

30,500

30,500

30,400

30,100

29,300

29,700

29,500

23,600

29,300

29,400

29,400

29,600

29,300

30,000

29,900

29,300

29,900

29,900

29,300

30,000

30,100

30,300

30,200

29,900

29,700

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

June 1-9. . . ...................

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

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

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

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

Feb.

29,900

30,100

29,800

29,300

29,300

29,900

30,300

30,200

29,900

30,200

30,100

30,500

30,300

30,200

29,900

29,900

29,300

29,700

29,500

a29,200

a29,200

a29,000

a29,000

a23,300

a23,300

a23,600

28,400

29,200

_

H

-

Secondfoot-days

1,733,900

1,361,100

965,000

31,725,600

929,900

330,000

1,244,500

2,230,800

4,275,300

1,483,800

_

-

Mar.

30,600

32,200

34,000

34,400

35,100

35,000

35,100

35,400

36,300

36,200

36,300

36,200

36,000

35,900

36,500

39,400

'40,400

40,000

40,300

43,400

43,400

43,200

41,800

41,300

41,600

45,100

47,600

50,200

51,200

53,600

56,800

Maximum

73,100

66,900

33,700

276,600

31, OOC

30,500

56,300

96,300

156,000

133, OOC

.

-

Apr.

59,900

61,900

63,100

63,10C

62,600

62,700

64,100

64,700

65,200

66,200

6S,200

70,300

72,400

73.40C

74,30C

75,70C

75,300

76,100

77,000

77,000

77,600

79,000

30,30C

33, OOC

34,70C

36,60C

37,40C

89.50C

92,20C

96,30C

-

May

102,200

114,600

121,900

1125,000

1126,000

1127,000

f 123, 000

1127,000

1126,000

1124,000

a!23,OOC

a!26,000

a!31,000

f!36,000

a!36,000

a!37,000

also, ooo

1156,000

1155,000

1154,000

f!54,000

a!53,000

152,000

150,400

150,300

149,800

143,300

147,500

147, 20C

147,200

149, 90C

Minimum

44,900

34,100

26,300

26,500

28f 600

28,400

30^600

59,900

102,200

153,600

_

-

June

153,600

155,300

157,100

1161,000

1165,000

1163,000

169,300

175,500

133,000

_

-

_

_

_

_

_

-

_

_

_

-

-

_

-

_

-

-

-

Mean

57,710

45,370

31,130

86,630

30,000

29,640

40,150

74,360

137,900

165,400

_

-

July

Per 

square 

mile

0.895

.703

.483

1.34

.465

.460

 622

1.15

2.14

2.56

_

_

Aug. Sept.

Runoff

Inches Acre-feet

1.03 3,543,OOCr>

.73 2,700,000

.56 1,914,000

18.29 62,930,000

.54 1,344,000

.48 1,646,000

.72 2,463,000

1.29 4,425,000

2.47 3,480,000

.36 2,953,000

I I

29,930,000

a No gage-height record; discharge computed on basis of records for station at international 

boundary and Kettle River near Laurier.

f Compute^ on basis of partly estimated gage-height record.
84 COLUMBIA RIVER MAIN STEM

Columbia River Reservoir at Grand Coulee Dam, Wash.

Location.- Staff gage, lat. 47°57', long. 118°58', In SEi sec. I, T. 28 N., R. 30 E., at 

town of Grand Coulee and 2,000 feet upstream from Grand Coulee Dam on the Columbia 

River. Datum of gage Is at mean sea level (levels by Bureau of Reclamation). Prior 

to Sept. 19, 1940, staff gage on dam, at same datum.

Drainage area.- 74,100 square miles.

Records available.- April 1938 to September 1941.

Extremes.- 1958": Maximum elevation observed during period April to September, 979.4 

feet June 6, 7, 9; minimum, 956.1 feet Aug. 29.

1938-39: Maximum elevation observed during water year, 1,025.2 feet Sept. 15; minimum, 961.8 feet Nov. 3.

1939-40: Maximum elevation observed during water year, 1,167.8 feet June 5; minimum, 1,009.0 feet Mar. 6.

1940-41: Maximum elevation observed during water year, 1,256.8 feet Aug. 26; minimum, 1,127.5 feet Oct. 1.

Remarks.- Reservoir is formed by concrete dam; construction of dam started in 1934, 

completed In 1941; storage began early In construction period. Capacity, 5,313,000 

acre-feet between elevations 1,208 (proposed lower limit of operation) and 1,290 feet 

(top of gates) above mean sea level. Dead storage, 4,326,000 acre-feet. Figures given 

herein represent total contents. Water will be used for power development and irrigation on Grand Coulee project of Bureau of Reclamation. Gage read once dally.

Cooperation.- Gage-height record and reservoir area furnished by Bureau of Reclamation.

Capacity table (eleTatlon, In feet,

(Prepared by Geological Surrey from areas

955

960

965

970

975

14,000

24,000

34,000

44,000

54,000

980

990

1,000

1,010

1,020

69,000

101,000

141,000

187,000

241,000

1,030

1,040

1,060

1,080

1,100

304,

374,

542,

757,

1,038,

and contents, In acre-feet)

furnished by Bureau of Reclamation)

000

000

000

000

000

1,120

1,140

1,160

1,180

1,200

1,395,

1,850,

2,447,

3,467,

3,965,

000

000

000

000

000

1,220

1,240

1,260

1,280

1,300

4,911,000

6,041,000

7,363,000

8,846,000

10,480,000

EleTatlon, In feet, at 8 a.m., 1938-41 

1938

Day

1

-2

3

4

5

6

7

8

9

10

11

12

13

14

15

Apr.

_

_

.

_

-

.

_

.

.

.

-

_

-

May

964.4

965.1

965.6

965.7

965. S

965.7

965.9

_

966.0

965.8

966.0

965.6

965.7

966.0

-

June

978.5

978.6

978.8

979.2

979.2

979.4

979.4

979.3

979.4

979.2

978.8

978.3

977.9

977.5

977.4

July

977.7

977.4

976.5

.

975.3

974.5

973.8

973.0

972.5

971.4

971.0

970.4

969.9

969.3

Aug.

962.5

962.2

961.9

961.5

961.0

960.5

959.6

959.3

959.2

958.9

958.6

958.6

-

957.5

Sept.

957.5

957.5

957.4

_

-

957.4

959. S

960.1

960.4

961.3

961.3

961.3

961.2

960.9

961.9

Day

16

17

IS

19

20

21

22

23

24

25

26

27

28

29

30

31

Apr.

_

.

.

.

-

_

-

961.5

961.6

962.0

962.0

962.5

962.9

963.1

963.8

-

May

966.3

966.5

966.6

966.6

966.5

966.7

-

967.6

968.4

969.5

970.7

972.2

973.5

.

-

978.0

June

977.2

977.0

976.7

976.7

976.4

976.5

976.6

977.0

977.3

977.7

978.3

978.5

978.5

97B.3

978.0

-

July

968.7

-

967.7

967.4

967.0

966.5

966.0

965.7

-

965.1

964.9

964.5

964.1

963.7

963.2

-

Aug.

957.3

957.2

957.1

957.0

957.0

.

956.9

956.9

957.1

957.0

957.0

956.3

-

956.1

956.2

957.2

Sept.

961. S

961.6

961.4

961.9

962.7

962.5

962.4

963.6

963.6

963.5

963.3

963.6

963.6

963.6

963.4

-

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

963.3

963.1

962.9

963.1

962.1

963.1

963.1

964.0

963.8

963.3

963.2

963.0

962.8

962.7

962.8

964.2

963.8

964.0

963.9

963.7

963.4

963.1

962.9

962.4

962.6

962.5

962.2

962.2

962.3

962.0

962.0

Nov.

962.0

962.0

961.8

964.0

964.1

963.9

963.5

963.9

963.6

963.5

966.4

966.4

970.1

970.4

970.5

970.4

970.5

970.3

970.1

970.1

969.2

969% 6

969.7

969.7

969.2

969.4

969.3

968.7

968.7

968.8

-

Dec.

968.5

968.5

968.5

968.2

967.9

968.1

968.3

968.3

969.8

972.4

972.5

973.9

974.8

976.8

977.4

977.4

977.4

977.2

976.9

976.9

977.2

977.3

977.1

977.1

976.5

976.3

976.4

976.6

976.6

977.0

Jan.

977.2

977.4

977.1

977.4

977.5

977.4

977.4

977.7

977-5

977.6

977.6

977.5

977.7

977.7

977.5

977.6

977.6

977.8

977.8

977.9

978.8

979.0

978.8

978.7

978.8

978.8

978.8

978.9

979.1

978.9

979.0

Feb.

979.1

979.2

979.2

980.6

981.1

981.1

983.0

984.4

985.5

987.4

967.9

987.9

988.2

990.6

992.7

993.3

993.6

993.4

993.5

993.3

993.4

993.3

993.2

993.3

993.3

993.2

993.0

993.0

_

_

-

Mar.

993.1

993.0

993.0

992.8

992.5

992.7

992.7

992.9

992.8

992.7

992.6

992.3

992.4

992.8

992.8

993.0

992.6

992.7

993.4

993.6

994.7

995.3

995.0

995.4

995.7

996.9

997.6

997.7

998.0

998.1

998.1

Apr.

998.1

998.5

998.8

999.1

999.5

999.7

999.9

1,000.1

*999.9

1,000.0

1,000.2

1,000.0

1,000.6

1,000.6

1,000.5

1,000.1

1,000.1

1,001.2

1,001.0

1,001.4

1,001.7

1,002.1

1,002.6

1,003.0

1,003.6

1,004.0

1,004.2

1,004.4

1,004.8

1,005.6

-

May

1,006.8

1,007.4

1,007.7

1,008.5

1,009.5

1,010.3

1,010.5

1,010.4

1,010.7

1,010.6

1,010.4

1,010.5

1,011.0

1,008.9

1,008.3

1,009.7

1,010.3

1,010.9

1,011.6

1,012.1

1,012.3

1,012.5

1,012.7

,012.8

,012.8

,012.8

,012.5

,012.5

,012.5

1,012.6

1,013.2

June

1,013.7

1,013.6

1,013.3

1,012.8

1,012.5

1,012.2

1,011.8

1,011.4

1,010.7

1,010.5

1.009.E

1,009.8

1,009.6

1,009.3

1,009.1

1,008.«

1,008.«

-

1,008.3

1,008.8

1,008.9

1,009.7

1,009.9

1,010.9

-

1,011.4

1,012.5

1,012.8

1,012.6

1,012.7

July

1,012.6

1,013.1

-

-

1,013.6

1,013.9

1,013.4

1,013.1

1,012.8

1,012.7

1,013.3

1,012.8

1,012.5

1,013.4

1,013.4

1,013.6

1,014.2

1,013.9

1,013.6

1,013.1

1,012.5

..

l',011.2

1,011.9

1,012.8

1,012.6

1,013.7

1,013.7

-

1,013.7

Aug.

1,014.0

1,014.0

1,014.0

1,013.8

1,013.8

1,013.0

1,012.7

1,012.5

1,013.0

1,012.1

1,012.0

1,012.5

-

1,010.1

1,011.3

1,012.7

1,012.6

1,012.8

1,012.7

1,013.4

1,013.2

1,013.1

1,012.1

1,011.5

1,012.3

1,013.4

1,013.6

1,013.8

1,013.9

1,014.7

1,015.1

Sept.

1,015.2

1,015.2

1,014.6

-

1,013.4

1,014.0

1,014.9

1,016.2

1,017.3

1,018.5

1,019.1

1,020.1

1,021.5

1,024.0

1,025.2

1,025.1

1,024.3

1,023.0

1,023.3

1,024.1

1,024.3

1,024.5

1,024.0

1,023.6

1,020.9

1,020.4

1,019.7

1,019.9

1,020.0

1,020.0

"
COLUMBIA RIVER MAIN STEM 85

Elevation, In feet, at 8 a.m., of Columbia River Reservoir at Grand Coulee Dam, Wash., 1938-41--Con.

1939-40

Daj

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

1,019.5

1,018.8

1,019.0

1,020.3

1,021.2

1,020.8

1,020.5

_

1,018.8

1,018.7

1,019.6

1,020.0

1,020.0

1,019.9

1,019.6

1,019.1

1,019.5

1,020.0

1,020.4

1,020.7

1,020.8

1,020.8

1,020.4

1,020.5

1,021.0

1,022.8

1,021.5

1,020.2

1,019.2

1,018.6

1,019.2

Nov.

1,020.2

1,020.9

1,021.4

1,021.6

1,021.7

1,021.4

1,021.1

1,018.9

1,017.5

1,018.6

1,019.7

1,019.3

1,018.5

1,018.2

1,017.8

1,018.1

1,018.2

1,017.9

1,017.3

1,016.8

1.017.0

1,017.9

1,018.6

1,019.1

1,019.6

1,019.4

1,018.5

1,018.5

1,019.0

1,019.7

Dec.

1,020.1

1,020.4

1,020.6

1,020.6

1,020.5

1,020.8

1,020.0

1,019.1

1,018.1

1,018.1

1,018.6

1,019.7

1,019.8

1,019.1

1,018.9

1,018.6

1,018.6

1,018.9

1,019.9

1,020.5

1,020.0

1,019.6

1,018.7

1,017.3

1,016.8

1,017.3

1,017.8

1,018.3

1,018.6

1,018.8

1,018.6

Jan.

1,018.6

1,018.0

l,017.t

1,017.8

1,017.2

1,017.1

1,017.5

1,017.6

1,018.0

1,018.1

1,018.3

1,018.1

1,018.0

-

1,017.2

1,017.7

1,018.3

1,018.7

1,019.1

1,019.9

1,019.0

1.018.7

1,017.7

1,017.6

1,017.7

1,017.7

1,017.6

1,017.7

1,017.6

1,018.7

1,020.2

Feb.

1,020.7

1,020.3

1,020.2

1,019.9

1,019.4

1,019.4

1,022.9

1,020.6

1,017.7

1,017.2

1,017.6

1,018.4

1,019.0

1,019.7

1,019.7

1,019.8

1,019.4

1,017.9

1,016.8

1,016.2

1,017.0

1,017.7

1,017.1

1,017.0

1,017.1

1,017.7

1,019.0

1,020.0

1,018.6

-

Mar.

1,017.7

1,016.0

1,012.8

1,010.9

1,009.2

1,009.0

1,009.1

1,009.5

1,012.0

1,015.1

1,017.3

1,018.0

1,018.3

1,019.0

1,021.0

1,022.8

1,024.8

1,026.7

1,030.4

1,032.6

1,036.1

1,039.1

1,042.2

1,045.0

1,048.3

1,051.5

1,055.2

1,058.9

1,062.5

1,063.4

1,061.1

Apr.

1,060.4

1,061.0

1,062.4

1,063.1

1,063.3

1,063.8

1,063.5

1,063.1

1,062.8

1,063.1

1,063.1

1,062.9

1,062.7

1,062.9

1,063.8

1,063.7

1,063.6

1,063.1

1,062.8

1,063.4

1,064.3

1,064.9

1,064.8

1,064.7

1,063.5

1,062.5

1,062.8

1,063.0

1,064.0

1,064.2

-

May

1,064.4

1,064.4

1,064.5

1,066.6

1,072.1

1,074.6

1,076.0

1,077.2

1,078.4

1,079.4

1,080.9

1,084.6

1,088.4

1,092.1

1,095.7

1,100.2

1,105.0

1,109.7

1,113.6

1,117.6

1,121.3

1,125.1

1,129.2

1,133.8

1,138.8

1,144.1

1,149.7

1,154.9

1,158.8

1,161.7

1,163.9

June

1,165.6

1,166.7

1,167.3

1,167.6

1,167.8

1,167.7

1,167.5

1,167.2

1,166.8

1,166.1

1,165.2

1,164.4

1,163.5

1,163.0

1,162.4

1,162.0

1,161.6

1,161.2

1,160.7

1,160.1

1,159.5

1,159.0

1,158.7

1,158.3

1,157.9

1,157.2

1,156.6

1,155.9

1,155.2

1,154.5

-

July

1,153.6

1,152.5

1,151.3

1,150.4

1,149.3

1,148.1

1,147.1

1,145.9

1,145.5

1,143.0

1,141.3

1,142.0

1,141.8

1,139.8

1,137.9

1,136.3

1,134.6

1,132.9

1,131.7

1,131.0

1,130.5

1,129.8

1,129.1

1,128.4

1,127.9

1,127.4

1,127.4

1,127.1

1,126.9

1,127.2

1,127.7

Aug.

1,128.1

1,128.4

1,128.5

1,128.4

1,128.1

1,127.9

1,128.0

1,128.2

1,128.4

1,128.0

1,128.1

1,128.1

1,128.1

1,128.2

1,128.2

1,128.3

1,128.2

1,127.9

1,127.4

1,127.2

1,127.3

1,127.6

1,128.2

1,128.9

1,129.1

1,128.5

1,128.5

1,128.5

1,128.7

1,129.0

1,129.2

Sept.

1,129.4

1,129.4

1,129.4

1,129.4

1,129.5

1,129.4

1,129.3

1,129.2

1,128.9

1,129.1

1,129.3

1,129.3

1,129.2

1,129.1

1,129.4

1,129.1

1,129.2

1,129.2

1,129.5

1,129.4

1,129.3

1,129.1

1,128.1

1,127.7

1,127.7

1,127.6

1,127.7

1,127.6

1,127.6

1,127.4

~

1940-41

Day

1

2

3

4

5

8

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

1,127.5

1,127.7

1,127.9

1,128.1

1,128.2

1,128.4

1,128.5

1,128.7

1,128.9

1,129.0

1,128.9

1,129.3

1,129.4

1,129.4

1,129.5

1,129.6

1,129.7

1,129.7

1,129.8

1,129.9

1,129.9

1,130.4

1,130.8

1,131.4

1,132.6

1,134.7

1,136.7

1,138.4

1,139.4

1,139.1

1,139.3

Nov.

1,139.7

1,139.8

1,139.8

1,139.7

1,139.8

1,139.9

1,139.9

1,139.8

1,139.8

1,139.8

1,139.5

1,139.4

1,139.5

1,139.3

1,139.3

1,139.4

1,139.6

1,139.1

1,138.5

1,138.1

1,138.0

1,137.9

1,137.9

1,138.9

1,138.8

1,138.0

1,138.2

1,138.4

1,138.5

1,138.6

-

Dec.

1,138.6

1,138.4

1,138.5

1,138.6

1,138.5

1,138.4

1,138.5

_

1,138.7

1,138.7

1,138.6

1,138.5

1,138.4

1,138.4

1,138.2

1,138.2

1,138.3

1,138.3

1,138.2

1,138.8

1,138.2

1,138.3

1,138.5

1,138.6

1,138.6

1,138.9

1,139.0

1,139.3

1,139.2

1,139.1

1,138.9

Jan.

1,138.8

1,138.6

1,138.5

1,138.2

1,138.2

1,138.2

1,138.2

1,138.8

1,138.2

1,138.2

1,138.2

1,138.2

1,138.1

1,138.0

1,138.2

1,138.2

L,138.2

1,138.4

1,138.4

L,139.6

1,139.2

1,139.2

1,139.0

1,139.0

1,139.1

1,139.3

1,139.4

1,139.4

1,139.3

1,139.2

1,139.0

Feb.

L,138.9

1,139.0

1,139.1

1,139.0

1,139.0

1,139.0

1,139.0

1,138.9

L,138.9

L,138.8

1,138.8

L.138.8

1,138.9

1,138.9

L, 139.0

1,138.9

1,138.8

1,138.8

1,138.8

L,138.6

1,138.6

1,138.6

1,138.6

1,138.4

1,138.4

1,138.4

1,138.4

1,138.5

_

-

' -

Mar.

1,138.6

1,138.9

1,139.4

1,139.3

1,139.4

1,139.3

1,139.8

1,139.1

1,139.2

1,139.6

1,139.5

1,139.4

1,139.8

1,139.0

1,139.0

1,139.1

1,139.4

1,139.4

1,139.3

1,139.8

1,139.4

1,139.3

1,139.1

1,138.9

1,136.9

1,138.9

1,139.2

1,139.4

1,139.6

1,139.6

1 , 139 . 7

Apr.

1,139.6

1,139.3

1,138.8

1,138.7

1,138.2

1,137.6

1,137.2

1,137.1

1,137.0

1,136.8

1,136.6

1,136.6

1,136.8

1,137.3

1,137.6

1,138.0

1,138.4

1,138.8

1,139.4

1,140.2

1,140.8

1,141.6

1,142.6

1,143.6

1,144.8

1,146.2

1,147.4

1,148.6

1,149.7

1,150.8

-

May

1,152.1

1,153.5

1,154.8

1,155.4

1,155.3

1,154.8

1,153.6

1,152.2

1,150.4

1,148.2

1,146.2

1,145.0

1,144.4

1,144.2

1,144.7

1,145.1

1,146.4

1,146.2

1,147.9

1,149.7

1,151.1

1,152.4

1,153.4

1,154.1

1,154.6

1,156.1

1,155.4

1,155.6

1,155.8

1,155.8

1,166.9

June

1,156.2

1,156.9

1,157.8

1,158.5

1,159.5

1,160.5

1,162.1

1,164.3

1,166.6

1,169.1

1,171.3

1,173.7

1,176.3

1,178.9

1,181.6

1,184.3

1,186.6

1,189.1

1,191.4

1,193.8

1,195.&

1,197.8

1,199.2

1,200.4

1,202.0

1,203.8

1,206.0

1,208.2

1,210.4

1,212.6

-

July

1,214.8

1,216.8

1,218.5

1,219.9

1,220.8

1,221.2

1,221.5

1,222.2

1,223.6

1,225.2

1,227.2

1,228.9

1,230.6

1,232.2

1,233.6

1,234.8

1,235.9

1,237.6

1,239.4

1,241.1

1,242.7

1,244.6

1,246.3

1,247.9

1,249.2

1,250.5

1,251.4

1,252.0

1,252.6

1,253.2

1,253.6

Aug.

1,253.9

1,254.2

1,255.6

1,254.8

1,255.0

1,255.0

1,255.2

1,255.2

1,255.0

1,255.0

1,255.0

1,255.2

1,255.6

1,255.9

1,256.0

1,256.0

1,255.7

1,255.6

1,255.7

1,255.8

1,256.0

1,256.2

1,256.2

1,256.5

1.256.6

1,256.8

1,256.7

1,256.5

1,256.3

1,256.0

1,255.8

Sept.

1,255.7

1,256.6

1,255.6

1,255.6

1,255.7

1,255.7

1,255.8

1,255.'8

1,255.8

1,255.8

1,255.8

1,255.8

1,255.9

1,256.0

1,256.0

1,256.2

1,256.2

1,256.4

1,256.5

1,256.6

1,256.7

1,256.6

1,256.5

1,256.4

1,256.4

1,256.2

1,266.2

1,256.0

1,255.7

1,255.6
COLUMBIA RIVER MAIN STEM

Monthly elevation and contents, of Columbia River Reservoir at Grand Coulee 

Dam, Wash,, 1938-41

Date

Sept. SO, 1940 (12 p.m.)....

Elevation 

(feet)

9V8 0

95V 2

977 0

979 0

993 0

1 012 7

1 019 2

1 019 7

1 127 7

1 129 2

1,127.5

Contents 

(acre-feet)

£41 » 000

236 200

239 200

2 269 000

1,552,000

Change In contents 

during month 

(acre-feet)

11 200

+38 000

9 «lVt

+1,586,000

a Interpolated.

Hote.- Elevations prior to Sept. 30, 1940 were observed at 8 a.m. on the 

dates Indicated; those after that date are for midnight from a graph based 

on 8 a.m. readings.
COLUMBIA RIVER MAIN STEM 

Columbia River at Grand Coulee, Wash.

87

Location.- Water-stage recorder, lat. 47°58'00", long. 118°58'45", opposite lot 4, sec. 

36, T. 29 N., R. 30 E., In pier 3 of highway bridge at Grand coulee, 2,500 feet downstream from Grand Coulee Dam and 14 miles upstream from Nespelem River. Datum of gage 

Is at mean sea level, datum of 1929.

Drainage area.- 74,100 square miles.

Records available.- April 1913 to September 1941 (monthly discharge only, April 1913 to 

June 1923, January 1924 to May 1928).

Average discharge.- 28 years, 106,300 second-feet (adjusted for change In contents In 

Columbia River Reservoir beginning October 1939).

Extremes.- Maximum discharge during year, 170,000 second-feet (regulated) May 9 (elevation, 

956.19 feet); minimum, 31,700 second-feet (regulated) Jan. 13-15 (elevation, 936.18 

feet).

1913-41: Maximum discharge, 492,000 second-feet June 15, 1913 (computed on basis of 

records of peak discharge at other gaging stations); minimum may have been less than 

15,300 second-feet (estimated) In January or February 1937, when stage-discharge 

relation was affected by Ice.

Maximum discharge known, 725,000 second-feet (estimated) during flood of June 1894.

Remarks.- Records excellent. Diversion above station for Irrigation Is small percentage 

of flow past gage. Some diurnal fluctuation caused by power plants on Spokane River 

and by construction at Grand Coulee Dam. Flow affected by natural storage In many 

lakes and by artificial regulation In Kootenal, Pend Orellle and Spokane River Basins, 

and In Columbia River Reservoir at Grand Coulee Dam (see p. 84).

Rating table, irater year 1940-41 (elevation, in feet, and discharge, in second-feet)

936.2 31,300

937.0 35,400

938.0 40,000

939.0

940.0

941.0

45,000

50,200

55,300

S4S.O 

944.0 

946.0

61,600

74,000

87,300

948.0

950.0

952.0

101,300

116,900

132,900

954.0

956.0

150,300

168,300

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3

4 

6

6

7 

8 

9 

10

11 

12 

13 

14 

16

16 

17 

18 

19 

SO

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

58,700 

58,700 

58,700 

58,800 

56,800

55,400 

55,400 

54,600 

53,900 

53,900

51,800 

50,600 

50,500 

50,600 

49,800

49,200 

48,500 

a47,800 

45,900 

45,900

46,000 

49,300 

55,600 

56,700 

61,100

50,100 

53,400 

63,600 

73,800 

74,000 

68,000

Hov.

66,300 

66,400 

65,000 

61,400 

58,300

57,500 

57,400 

56,000 

54,100 

54,000

52,300 

49,600 

48,700 

48,000 

45,200

43,100 

46,600 

50,800 

48,800 

44,400

42,000 

41,200 

39,600 

3S.800 

37,400

35,300 

35,300 

35,900 

37,500 

37,SOO

Month

Get 

Don

Dec

Ca.

Jam 

Fob] 

Man Apr* 

May 

June Jill" 

Augi 

Sop

Wa

Lendar year 1940

ber year 1940-41

Dec.

37,700 

37,100 

36,500 

37,000 

37,200

36,800 

36,400 

36,500 

37,000 

37,200

37,200 

36,800 

35,800 

35,400 

34,800

33,200 

32,700 

33,100 

33,300 

32,900

32,900 

32,900 

33,900 

35,400 

35,400

37,500 

39,600 

42,300 

44,000 

43,900 

43,400

Jan.

42,600 

41,300 

39,500 

37,000 

35,400

35,400 

35,400 

35,100 

34,300 

34,300

34,400 

34,200 

33,400 

31,700 

32,200

32,700 

32,800 

33,900 

34, 400 

36,600

40,200 

41,800 

39,800 

38,100 

38,000

39,800 

41,800 

41,600 

41,600 

41,400 

39,200

Feb.

37,900 

38,500 

39,000 

38,100 

37,300

37,300 

37,200 

37,200 

37,100 

37,100

37,200 

37,300 

37,600 

37,300 

37,600

37,300 

37,600 

37,300 

37,300 

36,400

35,400 

35,400 

35,500 

34,600 

33,900

33,800 

33,SOO 

33,800

Mar.

33,800 

34,600 

41,200 

44,500 

46,500

48,000 

47,900 

46,000 

44,500 

46,200

48,000 

48,000 

48,000 

46,000 

44,500

44,500 

46,800 

48,000 

47,800 

48,000

50,200 

52,100 

52,300 

49,800 

48,400

48,100 

50,400 

53,SOO 

55,500 

57,100 

63,400

Observed

Discharge In 

second-feet

Nazinun

74,000 

66,400 

44,000

265,100

42,600 

39,000 

63,400 

80,700

97,400 

89,700

169,100

Mini45,900 

35,300 

32,700

27,400

31,700 

33,800 

33,800 

68,100 

82,500 

J.1,100 

73,600 

77,800 

80,400

31,700

Nean

54,730 

48,490 

36,640

91,310

37,090 

36,640 

47,870 

75,620 

145,300 

141,700 

92,890 

89,290 

83,390

74,300

R-unoff 

in 

acre-feet

3,365, OOC 

2,885,OOC 

2, 253, OOC

66,280,000

2,2S1,OOC 

2, 035, OOC 

2,943,OOC 

4, 500, OOC 

8,935,OOC 

8, 430, OOC 

5, 711, OOC 

5, 490, OOC 

4, 962, OOC

53, 790, OOC

Apr,

68,100 

76,400 

77,800 

79,400 

SO, 700

SO, 600 

79,200 

76,700 

76,800 

77,100

76,400 

76,500 

76,700 

76,600 

76,700

77,500 

77,700 

75,600 

73,500 

73,800

72,500 

70,500 

71,000 

70,900 

71,200

71,500 

71,800 

74,500 

80,300 

80,600

May

S2,500 

96,400 

112,100 

127,700 

140,500

150,300 

169,300 

162,000 

169,100 

165,600

154,800 

144,000 

139,500 

139,200 

139,300

140,400 

144,900 

148,000 

149,600 

150,700

151,800 

152,600 

152,800 

153,200 

153,700

153,SOC 

153,900 

154,100 

154,300 

154,30C 

154, 40C

Change in

Columbia 

River 

Reservoir 

(acre-feet)

+287,600 

-25,600 

+5,000

+1,586,000

+2,500 

-7,500 

+25,600 

+342,100 

+138,500 

+2,291,000 

+2,321,000 

+136,800 

-13,800

+5,503,000

June

154,800 

155,700 

156,100 

156,300 

156,300

153,600 

153,200 

140,800 

143,600 

145,300

142,700 

136,300 

134,800 

135,900 

137,900

140,800 

143,300 

144,800 

146,000 

149,300

152,500 

153,800 

152,700 

146,000 

128,200

127,000 

121,000 

116,700 

113,100 

111,100 

-

July

112,000 

112,600 

115,000 

119,300 

122,300

124,700 

121,300 

112,600 

103,300 

93,700

89,000 

86,800 

85,100 

85,700 

84,400

79,900 

75,800 

73,600 

74,100 

74,700

74,500 

74,300 

74,900 

76,500 

81,300

85,400 

91,600 

93,400 

93,600 

94,000 

94,100

Aug.

94,000 

93,900 

94,300 

94,200 

94,400

94,400 

94,200 

93,100 

88,000 

83,800

80,400 

77,800 

81,000 

87,200 

93,400

96,000 

94,300 

91,300 

86,200 

82,100

82,200 

82,100 

82,300 

82,300 

84,700

91,800 

97,200 

97,400 

95,700 

91,500 

86,900

Sept.

82,300 

80,600 

80,400 

80,600 

80,600

80,800 

80,800 

80,600 

80,600 

80,400

80,800 

81,000 

80,900 

80,400 

81,000

83,200 

85,500 

87,700 

89,500 

89,700

89,000 

89,600 

87,900 

86,000 

85,100

84,200 

84,200 

64,600 

83,000 

81,800

Adjusted for change in 

reservoir contents

Runoff 

In 

acre-feet

3,663,000 

2,859,000 

2,258,000

67,870,000

2,284,000 

2,028,000 

2,969,000 

4,842,000 

9,074,000 

10,720,000 

8,032,000 

5,627,000 

4,948,000

69,290,000

Discharge in 

seoond-feet

Mean

59,410 

48,050 

36,720

93,490

37,150 

36,520 

48,290 

81,370 

147,600 

180,200 

130,600 

91,510 

83,150

81,900

Fer 

square 

mile

0.80S 

.64E 

.496

1.26

.50]

.49;

.65£ 

1.10 

1.99 

2.43 

1.76 

1.23 

1.12

1.11

Runin 

inches

.92

.72 

.57

17.18

.58 

.51 

! .75 

1.23 

2.29 

2.71 

2.03 

1.42 

1.25

14.98

a Mo gage-height record; discharge interpolated.

Mote.- Storage adjustments determined from midnight elevations based on 8 a.m. gage readings.
88 COLUMBIA RIVER MAIN STEM

Columbia River at Trinidad, Wash.

Location.- Water-stage recorder, lat. 47°13'30", long. 120°00'50", in SEi sec. 13, T. 20 

H., R. 22 E., half a mile southwest of Trinidad, 8l miles downstream from Colocham 

Creek, and 12 miles downstream from Rock Island Dam. Datum of gage is 500 feet above 

mean sea level, subject to correction to datum of 1929.

Drainage area.- 89,700 square miles.

Records available.- October 1930 to September 1941. January to December 1910 (gage

neignts only) and May 1913 to December 1916 at sites about 1 mile above and at highway 

bridge at Wenatchee, 24 Tniles upstream, published as Columbia River at Wenatchee, 

Wash.: January 1917, at Beverly, 29 miles downstream; January 1917 to September 1930, 

at site hair a mile north of Vernita, 50 miles downstream, published as Columbia River 

at Vernita, wash.

Average discharge.- 28 years, 116,100 second-feet (adjusted for change in contents in 

coIumBia River Reservoir beginning October 1939).

Extremes.- Maximum discharge during year, 173,300 second-feet May 10 (gage height, 35.18 

feet); minimum, 31,500 second-feet (regulated) Jan. 15 (gage height, 18.60 feet).

1913-41: Maximum discharge, 528,000 second-feet June 15, 16, 1913 (gage height, 

45.7 feet, site and datum then in use): minimum, 4,120 second-feet (regulated) Feb.10, 

1932 (gage height, 11.40 feet).

Maximum discharge known, about 740,000 second-feet June 7, 1894 (based on information obtained at other points).

Remarks.- Records excellent. Diversion above station for irrigation is small percentage 

or flow past gage. Some diurnal fluctuation caused by power plant at Rock Island and 

by construction at Grand Coulee Dam. Flow affected by natural storage in many lakes 

and by artificial regulation in Kootenai, Pend Oreille, Spokane, Okanogan, and Chelan 

River Basins, and in Columbia River Reservoir at Grand Coulee Dam (see p. 84).

Discharge, In seeond-feet, water year October 1940 to September 1941

Day

1 

2 

S 

4 

5

6

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

65,400 

62,700 

62,600 

62,300 

62,400

60,900 

59,200 

59,200 

56,600 

57,800

58,00X3 

57,300 

54,900 

55,000 

55,000

54,400 

53,400 

53,000 

51,800 

50,300

52,200 

51,300 

53,800 

60,600 

64,000

58,200 

56,500 

58,200 

67,400 

77,000 

78,400

Nov.

72,900 

71,400 

71,200 

70,200 

66,600

63,900 

62,700 

62,700 

60,900 

59,200

58,300 

56,300 

54,300 

53,000 

52,300

50,300 

47,500 

50,000 

54,400 

53 , 800

50,100 

46,500 

45,900 

44,100 

43,800

42,600 

39,700 

39,700 

40,100 

40,600

Jlonth

Oct 

NOT

D«o

Ca.

Jam 

Fab 

Hart 

Apr 

May 

Jnni 

Juli 

Augi 

Sep

Wa

.endar year!94C

t ember. .,_-....

Ser year 1940-41

Dec.

40,200 

40,600 

41,100 

41,200 

41,500

41,400 

39,700 

39,900 

41,000 

41,000

41,200 

41,000 

40,900 

39,100 

39,400

40,100 

37,400 

36,700 

37,000 

37,900

35,600 

37,300 

37,800 

37,600 

38,000

38,700 

39,900 

42,200 

44 , 500 

46,700 

47,100

Jan.

46,500 

45,400 

44,900 

41,800 

41,500

33,900 

38,700 

38,100 

38,000 

37,300

37,000 

37,800 

33,100 

37,500 

35,100

34,800 

35,300 

35,800 

35,900 

36,800

38,200 

41,700 

43,900 

43,100 

40,500

40,000 

41,600 

44.10fl 

44;400> 

44,100 

44,400

Feb.

42,900 

40,200 

40,800 

41,600 

41,000

39,300 

39,300 

39,200 

40,800 

39,400

39,900 

40,200 

40,000 

39,600 

39,200

40,600 

39,800 

40,300 

40,100 

39,900

39,200 

37,700 

37,800 

38,900 

38,200

36,900 

36,600 

36,300

Mar.

37,600 

39,100 

40,000 

44,200 

49,000

50,300 

51,700 

51,700 

50,700 

49,900

50,400 

52,800 

52,800 

52,400 

50,800

48,300 

50.300 

51,600 

53,900 

53,900

54,100 

57,800 

54,500 

57,600 

56,300

54,300 

54,300 

55 , 800 

60,100 

63,700 

66,400

Observed

Discharge In 

second-feet

Maxiinmn

78,400 

72,900 

47,100

27S,000

46,500 

42,900 

66,400 

96,100 

172,300 

165,100 

130,000 

108,500 

94,300

172,300

Minimus

50,300 

39,700 

35,600

29,800

34,800 

36,300 

37,600 

72,200 

97,500 

12 1,700 

74,300 

81,600 

84,100

34,800

Mean

59,110 

54,200 

40,120

96,180

40,040 

39,510 

52,150 

86,410 

151,800 

152,500 

98,360 

92,630 

37,660

79,700

Runoff 

In 

acre-feet

3,634,OOC 

3,225,000 

2,467,OOC

69,820,000

2,462,000 

2,194,000 

3,207,000 

5,142,000 

9,335,000 

9,076,000 

6,048,000 

5,695,000 

5,216,000

57,700,000

Apr.

72,200 

79,000 

88,000 

89,800 

91,400

92,200 

91,900 

89,400 

86,700 

37,200

87,600 

86,800 

87,700 

37,500 

87,400

87,700 

87,700 

87,500 

85,300 

83,300

83,700 

82,800 

81,600 

82,700 

83,500

84,000 

85,900 

86,400 

89,200 

96,100

May

97,500 

101,200 

113,300 

f!23,500 

f!44, 200

150,300 

158,100 

163,900 

167,300 

172,300

168,500 

159,800 

154,600 

151,700 

151,200

150,500 

152,300 

154,700 

156,100 

156,900

157,200 

157,500 

158,300 

160,000 

160,400

a!61,000 

0161,000 

0161,000 

a!61,000 

160,300 

160,700

Change in

contents in 

Columbia 

River 

Reservoir 

(acre-feet)

+287,600 

-25,600 

+5,000

+1,586,000

+2, 500 

-7,500 

+25,600 

+342,100 

+138,500 

+2,291,000 

+2,321,000 

+136,800 

-13,800

+5,503,000

June

162,200 

162,700 

163,100 

163,200 

163,800

165,100 

161,800 

157,500 

153,900 

156,000

156,200 

154,400 

153,300 

152,700 

151,500

152,400 

151,300 

152,000 

152,800 

154,400

156,700 

157,808 

161,200 

157,700 

150,900

143,300 

133,300 

129,200 

123,700 

121,700

July

119,200 

120,000 

120,200 

125,000 

125,000

128,800 

130,000 

127,200 

118,500 

109,200

100,000 

94,900 

92,700 

90,100 

90,000

88,400 

83,900 

80,600 

79,200 

81,300

74,300 

78,800 

78,300 

77,900 

80,400

84,400 

88,100 

93,600 

95,600 

96,800 

96,900

Aug.

96,600 

96,900 

96,600 

96,200 

96,800

96,700 

97,000 

97,200 

95,400 

90,200

95,400 

83,600 

81,600 

84,100 

89,300

95,300 

97,300 

96,400 

93,000 

88,800

84,900 

84,800 

84,900 

87,400 

81,600

87,500 

95,200 

108,500 

99,700 

98,100 

94,400

Sept.

89,900 

85,400 

84,600 

84,300 

84,400

84,100 

84,200 

84,400 

84,500 

84,600

85,100 

84,900 

84,900 

84,900 

84,800

85,900 

88,800 

89,500 

92,700 

93,800

93,900 

93,800 

94,300 

93,000 

89,400

88, 600 

88,000 

88,200 

88,400 

86,400

Adjusted for change in 

reservoir content!

Runoff 

in 

acre feet

3,922,000 

3,199,000 

2,472,000

71,420,000

2,464.000 

2,136,000 

3,233,000 

5,484,000 

9,474,000 

11,370,000 

8,369,000 

5,832,000 

5,202,000

63,210,000

Discharge In 

second-feet

Mean

63,790 

53,760 

40,200

98,370

40,070 

39,360 

52,530 

92,160 

154,100 

191,100 

136,100 

94,850 

87,420

87,310

Per 

squar* 

Bile

0.711 

.595 

.448

1.10

.441 

.43?

.sse

1.03 

1.72 

2.13 

1.52 

1.06 

.976

.973

Runin 

inehes

0.82 

.67 

.52

14.94

.52 

.46 

.68 

1.15 

1.96 

2.38 

1.75 

1.22 

1.09

13.24

a No gage-height record; discharge computed on basis of records for station at Qrand Coulee.

f Computed on basis of partly estimated gage-height record.

Mote.- Storage adjustments determined from midnight elevations baaed on 8 a.m. gage readings.
KOOTENAI RIVER BASIN 89

Kootenai River at Newgate, British Columbia 

(International Gaging Station)

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

llb"10', at highway bridges, 0.7 mile northwest of Newgate and 0.9 mile north of the 

International boundary, respectively. Datum of main river gage lowered 1.00 foot 

Oct. 1, 1940.

Drainage area.- 7,660 square miles.

Records available.- October 1930 to September 1941.

Average discharge.- 11 years, 9,075 second-feet.

Extremes.- Maximum discharge observed during year, 23,300 second-feet June 3; minimum, 

1,770 second-feet Dec. 17 (estimated), Feb. 17.

1931-41: Maximum discharge observed, 83,500 second-feet June 18, 1933; minimum observed, 994 second-feet Feb. 7, 1936.

Remarks.- Records good except those for periods of ice effect, which are fair. Gages read 

once daily. Records give total flow of main channel and slough.

Cooperation.- This station Is one of the international gaging stations maintained by 

Canada under agreement with the United States.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10-

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

4,660

4,580

4,470

4,320

4,250

4,620

4,070

4,000

3,930

4,600

6,030

6,140

6,110

5,700

5,350

4,910

4,680

4,560

4,560

4,540

4,910

5,530

5,S90

5,430

5,570

5,450

5,370

5,740

5,470

5,270

5,230

Nov.

4,950

4,770

4,680

4,540

4,320

4,160

4,120

4,070

3,910

3,390

3,360

2,740

2,500

2,410

2,360

2,470

2,620

2,840

2,970

2,910

3,070

3,070

2,920

2,960

3,020

3,010

3,010

3,020

3,030

3,000

-

Dec.

2,950

2,970

3,020

3,110

3,110

3,230

3,160

3,170

3,100

2,960

2,610

b2,310

bl,940

bl,870

bl,790

»t>l,810

bl)770

bl,840

b2, 140

b2,600

03,000

b3,200

3,210

3,070

3,130

3,060

3,040

2,990

2,870

2,870

2,780

Jan.

2,660

b2,240

b2,110

b2. 030

b2,110

2,360

2,380

2,380

2,300

2,380

2,360

2,330

2,380

2,390

2,410

2,410

2,420

2,460

2,510

2,500

2,440

2,180

2,280

2,020

2,040

2,080

2,300

2,320

2,300

2,280

2,140

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

2,300

2,340

2,400

2,400

2,320

2,120

1,990

2,280

2,280

2,280

2,230

2,240

2,270

2,180

1,930

1,870

1,770

1,930

1,950

2,010

2,100

2,040

1,940

1,840

1,900

2,070

2,110

2,180

-

-

-

Secondfoot-days

156,440

100,200

84,680

2 913 710

71,530

96)360

518 200

525)500

172',970

234,220

2,535,280

Mar.

2,670

2,780

2,830

2,780

2,680

2,680

2,710

2,890

2,870

2,820

2,760

2,670

2,620

2,560

2,570

2,600

2,650

2,780

3,070

3,150

3,260

3,260

3,260

3,270

3,320

3,430

3,610

3,910

4,250

4,580

5,060

Maximum

6,140

4,950

3,230

43,600

2,660

2,400

5,060

13,800

22,600

23,300

13,000

6,290

10,900

23,300

Apr.

5,720

5,940

6,020

6,130

6,130

6,110

6,000

6,090

6,220

6,610

7,180

7,440

8,130

8,440

8,360

8,590

8,270

7,780

7,200

6,940

6,960

7,360

8,120

8,610

9,420

9,880

10,600

11,400

12,400

13,800

-

Hay

15,600

18,000

19,600

18,200

17,200

14,100

13,600

12,800

11,600

10,800

10,400

12,000

16,000

19,300

22,200

20,600

21,200

22,600

20,400

17/300

15,600

15,000

14,300

14,900

17,400

19,200

19,400

17,700

17,200

16,600

17,400

Minimum

3,930

2,360

1,770

1,590

2,020

1,770

2,560

5,720

10,400

12 700

6)270

5,020

5,480

1,770

-June

20,000

21,500

23,300

21,900

21 , 200

20,400

20 , 000

19,600

20,000

20,100

18,700

17,900

18,800

20,600

19,000

18,200

17,100

16,500

16,200

16,300

15,000

13,600

13,000

12,700

14 , 900

15 , 500

14,400

12,800

613,400

12,900

-

Mean

5,050

3,340

2,730

7,960

2,310

3*11O

7*930

15)700

17,500

5 ',580

7,810

6,950

July

13,000

13,000

12,200

11,900

12,100

11,700

11,200

10,900

10,700

9,900

9,430

8,870

8,480

8,230

7,950

7,980

8,120

8,730

8,840

8,730

8,510

7,750

7,390

7,110

6,890

6,620

6,270

6,340

6,400

6,420

6,400

Per

square 

mile

0,66

.44

.36

1.04

.30

 28

.41

1.04

2. 18

2* 28

1.17

 73

l!o2

.91

Aug.

6,290

5,£

5,E

5,£

60

80

00

5,580

5,560

5,4

5,£

5,£

30

;BO

10

5,100

5,190

5,£

5,1 5,'

60

70

60

6,000

6,000

5,£

5,{

5,£

60

320

.40

5,330

5,260

5,]

5,C

5,£

L40

)20

>60

5,390

5,540

6,]

5,5

5,£

5,5

40

20

40

00

5,640

Sept.

5,520

5,480

5,840

6,020

6,220

6,840

6,860

6,860

6,610

6,280

6,970

7,280

7,410

7,620

8,170

7,860

8,210

9,940

10,900

10,100

9,630

8,730

7,850

8,020

8,160

8,440

9,050

9,510

9,140

8,700

~

Runoff

Inches

0.76

.49

.42

14.17

.35

.29

.47

1.16

2* 51

2* 54

l!35

84

l!l4

12.32

Acre-feet

310,300

198,700

168,000

5,779,000

141,900

117,600

191,100

471,800

1,028,000

1,042,000

551,500

343,100

464,600

5,029,000

* Winter discharge measurement made on this day. 

b Stage-discharge relation on main channel affected by ice.

e Oage readings not representative of average for day; discharge computed on basis of records for 

other Kootenai River stations.
90 KOOTEMI RIVER BASIN

Kootenai River at Llbby, Mont.

Location. Water-stage recorder, lat."48024', long. 115°33', In NHi sec. 3, T. 30 N.,

 R. 31 W., 1,200 feet downstream from highway bridge at Llbby and half a mile downstream 

from Llbby Creek.

Drainage area.- 10,240 square miles.

Records available.- October 1910 to September 1941.

Average discharge.- 15 years (1912-15, 1917-18, 1928-32, 1934-41), 10,250 second-feet.

Extremes.- Maximum discharge during year, 26,800 second-feet May 19 (gage height, 8.18

 feet); minimum, 1,410 second-feet Feb. 18 (gage height, 0.56 foot).

1910-41: Maximum discharge, 130,000 second-feet June 21, 1916 (gage height, 19.17 

feet); minimum, 895 second-feet, discharge measurement, Jan. 11, 1930 (affected by 

ice).

Remarks.- Records excellent except those for periods of Ice effect, which are fair. No 

known diversions or regulation above station.

Discharge, in seoond-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

5,020

4,890

4,890

4,760

4,760

4,630

4.630

4,380

4,380

4,260

4,260

5,280

6,640

6,500

6,080

5,670

5,410

5,150

4,890

4,890

4,890

5,150

5,670

6,220

6,220

6,080

6,360

6,360

6,220

5,940

5,670

Nov.

5,670

5,540

5,280

5,150

4.890

4,760

4,630

4,500

4,500

4,260

3,900

3,660

3,080

h2,980

2,530

h2,590

d2,940

3,300

3,300

3,190

3,300

3,190

3,540

3,540

3,680

3,560

3,450

3,560

3,680

3,680

-

Dec.

3,560

3,560

3,560

3,560

3,680

3,680

3,800

3,680

3,680

3,680

3,450

2,830

t>2,320

bl,710

bl,750

1,960

t>lil,900

bh2,050

t>h2,200

h2,640

h3,080

a3,440

h3,790

h4,040

a3,920

h3,790

h3,550

h3,550

3,450

3,340

3,340

Jan.

b3,100

b2,850

b2,650

b2,610

t>2,650

t>2,760

t>2,760

h3,080

h2,850

h3,080

h3,080

h2,850

h3,080

h3,310

h3,080

h2,850

h2,eso

h2,850

h2,850

h3,080

h2,850

h2,850

h2,640

hi, 780

hi, 870

h2,240

h2,340

2,780

2,690

2,560

2,690

Month

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

November ........... V ..........

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

2,650

2,690

2,810

2,880

2,780

2,540

2,470

2,470

2,430

2,430

2,520

2,580

2,630

2,610

2,450

2,240

2,110

2,090

2,170

2,170

2,280

. 2,340

2,410

2,260

1,980

2,150

2,240

2,300

-

.

-

Secondfoot-days

166,150

115,830

98,540

3,213,530

85,580

67,680

111,410

262 910

583 ) 600

576,400

295,570

181,710

245,820

2,791,200

Mar.

2,520

3,100

3,450

3,450

3,340

3,340

3,340

3,340

3,450

3,450

3,450

3,340

3,220

3,220

3,100

3,100

3,100

3,220

3,450

3,560

3,680

3,800

3,800

3,680

3,800

h3,790

h4 , 040

h4,040

h4,810

h5,080

h5,350

Maximum

6,640

5,670

4,040

47,800

3,310

2,880

5,350

14,000

25,800

25,400

13,600

6,680

11,400

25 , 800

Apr.

h5,910

h6,800

h7,110

h7,110

h7,110

h7,110

h7,110

h7,110

h7,110

h7,110

h7,760

h8, 100

8,640

9,240

9,540

9,540

9,540

9,240

8,640

8,350

7,780

8,060

8,350

9,240

10,100

10,800

11,400

12,000

13,000

14,000

May

15,800

18,100

20,700

21,600

20,700

19,000

16,900

15,000

13,600

12,600

12,000

12,000

14,000

18,100

22,500

24,400

23,900

25,800

25,400

22,500

19,800

17,700

16,900

16,100

17 , 300

19,800

21,600

21,200

19,800

19,400

19,400

Minimum

4,260

2,530

1,710

1,700

1,780

1,980

2,520

5,910

12,000

13,300

6,550

5,260

5,770

1,710

June

20,700

22,500

24,400

25,400

23,900

23,000

22,100

21,600

21,600

21,600

21,600

20,300

19,800

20,700

22,100

21,200

19,400

18,500

17,700

17,700

17,300

16,100

14,700

14,000

14,300

15,800

16,100

15,000

14,000

13,300

M63LH

5,360

3,861

3,179

8,780

2,761

2,417

3,594

8,764

18,830

19,210

9,535

5,862

8,194

7,647

July

13,600

13,600

13,300

12,600

12,300

12,600

12,000

11,700

11,400

11,100

10,100

9,540

9.S40

8,940

8,640

8,350

8,350

8,350

8,940

9,240

8,940

8,640

8,060

7,780

7,500

7,220

6,950

6,680

6,680

6,550

6,680

Per

square 

mile

0.523

.377

.310

.857

.270

.236

.351

.856

1.84

1.88

.931

.572

.800

.747

Aug.

6,6SO

6,

6,

6,

120

390

L60

5,900

5,900

5,

5,

5,

770

540

520

5,390

5,260

5,

5,L

5,

590

)20

520

5,900

6,290

6,'

6,

6,t

120

390

)30

5,770

. 5,520

s,;

5,.

s,;

590

590

590

5,520

5,640

6,]

6,J

6,]

6,]

60

90

L60

60

6,030

Sept.

5,900

5,770

5,900

6,030

6,290

6,550

6,950

7.S20

7,220

6,820

6,820

7,220

7,780

8,060

8,350

8,640

8,640

9,240

10,800

11,400

L0.800

10,100

9,240

8,940

8,640

3,640

3,940

9,540

9,840

9,540

Runoff

Inches

0.60

.42

.36

11.68

.31

.25

.40

.96

2.12

2.10

1.07

.66

.89

10.14

Ac re- feet

329,600

229,700

195,500

6,374,000

169,700

134,200

221,000

521,500

1,158,000

1,143,000

586,300

360,400

487,600

5,536,000

a No gage-height record; discharge interpolated. 

t> Stage-discharge relation affected by ice. 

h Computed from wire-weight gage reading.
KOOTENAI RIVER BASIN 91

Kootenai River at Leonia, Idaho

Location.- Water-stage recorder, lat. 48°37', long. 116°03', in SWi 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 1941.

Average discharge.- 13 years, 12,020 second-feet.

Extremes.- Maximum discharge during year, 31,900 second-feet May 17 (elevation, 1,809.05 

reetj; minimum daily discharge, 2,000 second-feet (estimated) Dec. 17; minimum elevation, 1,798.45 feet Dec. 16.

1928-41: 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.- Records good. No diversion or regulation above station.

Rating table, water year 1940-41, except periods of ice effect (gage height, in feet,

discharge, in second-feet) 

(Shifting-control method used June 11 to Sept. 30)

1,798.8

1,799.0

1,799.4

1,799.3

1,800.2

1,800.6

1,900

2,120

2,620

3,210

3,950

4,810

1,801.0

1,801.4

1,801.8

1,802.2

1,802.6

1,803.0

5,750 

6,750 

7,810 

S,910 

10,030 

11,180

1,803.5

1,804.0

1,804.5

1,805.0

1,805.5

1,806.0

12,660

14,200

15,790

17,430

19,100

20,800

1,806.5

1,807.0

1,807.5

1,808.0

1,308.5

1,809.0

22,500

24,300

26,100

27,900

29,300

31,700

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

5,250

5,160

5,090

5,040

4,990

4,880

4,360

4,660

4,590

4,500

4,480

4,860

6,460

6,720

6,320

5,870

5,560

5,340

5,160

5,040

4,970

5,200

5,580

6,120

6,420

6,280

6,420

6,520

6,390

6,160

6,090

Nov.

5,390

5,770

5,560

5,390

5,250

5,090

4,900

4,860

4,830

4,720

4,390

4,060

b3,600

b3,150

b2,700

b2,850

b3,050

3,470

3,430

3,420

3,510

b3,500

3,660

3,660

3,770

3,690

3,660

3,690

3,770

3,830

Dec.

3,310

3,750

3,730

3.7SO

3,830

3,930

3,990

3,990

3,950

3,890

3,710

3,350

02,800

b2,300

b2,100

b2,050

b2,000

b2,100

*b2,200

b2 , 850

b3,350

b3,900

b4,200

b4,300

b4,200

b4,000

3,970

3,950

3,850

3,710

3,660

Jan.

b3,600

b3,250

b3,000

b2,850

b2,700

b2,850

b2,900

b3,100

b3,100

b3,050

b3,000

b2,950

b3,050

*b3,350

b3,200

b3,200

b3,200

b3,250

3,310

3,380

3,420

3,100

3,180

3,150

2,760

2,660

2,770

3,050

3,070

2,990

3,000

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

3,100

3,100

3,100

3,100

3,070

2,890

2,790

2,930

2,89X>

2,890

2,930

2,980

3,020

2,990

2,920

2,750

2,560

2,480

2,610

2,730

2,730

2,750

2,830

2,830

2,560

2,520

2,720

2,770

_

_

-

Second 

foot-days

170,920

123,120

107,170

3,576,760

95 440

79 540

13l|o50

319,560

668,300 

619,000

319,380

190,410

264,110

3,087,940

Mar.

3,020

3,560

4,030

4,060

3,990

3,890

3,850

3,870

3,950

4,060

4,030

3,930

3,790

3,710

3,660

3,620

3,620

3,790

4,060

4,290

4,410

4,460

4,460

4,410

4,440

4,520

4,700

4,970

5,340

5,890

6,670

Maximum

6,720

5,890

4,300

51,800

3 , 600

3,100

6,670

16,700

30,800

14 ', 600

7,040

12,300

30,800

Apr.

7,510

8,300

8,880

9,080

9,020

3,970

8,800

8,600

8,570

8,380

9,440

10,100

10.700

11,200

11,600

11,600

11,500

11,100

10,500

9,950

9,610

9,750

10,300

11,200

12,100

12,700

13,300

14,300

15,300

16,700

-

May

18,600

21,200

23,200

24,300

23,800

21,700

19,300

17,400

15,900

14,600

13,800

14,100

15,900

20,100

24,200

26,500

29,800

30,800

29,800

26,400

23,200

21,000

19.600

19,000

19,500

21 , 800

23,700

23,900

22,200

21,500

21,500

Minimum

4,480

2,700

2,000

1,850

2,660

2,480

3,020

7,510

13,800

14,500

7,010

5,530

6,120

2,000

June

22,800

24,200

26,000

27,100

26,000

24,900

24,100

23,300

23,100

23,000

85,000

El, 900

21,000

21,700

23,000

22,800

21,000

20,000

19,100

19,000

18,700

17,500

16,000

14,900

15,200

16,400

17,100

16,500

15 , 200

14,500

~

Mean

5,514

4,104

3,457

9,773

3,079

2,841

4 227

loleso

21,560

20,630

10,300

6,142

8,804

8,460

July

14,500

14,600

14,400

13,800

13,400

13,400

13,100

12,600

12,100

11,900

11,300

10,600

10,100

9,860

9,300

9,080

8,990

9,050

9,410

9,720

9,640

9,330

8,850

8,460

8,080

,760

,570

,240

,110

,010

,060

Per

square 

mile

0.470

.350

.294

.832

.262

.242

.360

.907

1.84

1.76

a 877

.523

.750

.721

Aug.

7,040

6,£ 6,"

6,(

10

20

>20

6,240

6,140

6,C

5,S 5,"

90

20

50

5,650

5,530

5,E

5,« 5,"

60

80

50

6,040

6,420 6,"

6,E

6,:

00

90

60

6,060

5,800

5,«

5,«

5,

530

ilO

330

5,700

5,730 6,: 6,"

6,

6,"<

20

20

570

90

6,440

Sept.

6,240

6,140

6,120

6,360

6,570

6,830

7,380

7,510

7,590

7,400

7,300

7,680

3,350

S,830

9,250

9,670

9,390

9,830

11,200

12,300

11,800

11,100

10,300

9,720

9,330

9,410

9,610

10,100

10,500

10,300

~

Runoff

Inches

0.54

.39

.34

11.33

.30

.25

.42

1.01

2. 12

1 * 96

lioi

.60

.84

9.78

Acre-feet

339,000

244,200

212,600

7,094,000

189,300

157,800

259,900

633,800

1,326,000

1,228,000

633,400

377,700

523,900

6,126,000

* Winter discharge measurement made on this day. 

b Stage-discharge relation affected by ice.

461678 O-42-7
92 KOOTENAI RIVER BASIN

Kootenal River at Boom Camp, near Bonners Ferry, Idaho

Location.- Water-stage recorder, lat. 48°42'05", long. 116°14'30", In NWi sec. 29, T. 

62 N., R. 2 E., 600 feet east of Boom Camp, 3i miles upstream from Bonners Ferry, and 

4 miles downstream from Moyle River. Datum of gage Is 1,700.00 feet above mean sea 

level (U. S. Coast and Geodetic Survey datum).

Records available.- October 1927 to September 1941 In reports of Geological Survey. April 

1925 to September 1927 In reports of Dominion Water and Power Bureau, Department of 

Mines and Resources, Canada.

Extremes.- Maximum water-surface elevation during year, 1,764.87 feet May 17; minimum, 

 1,756.19 feet Dec. 17.

1927-41: Maximum water-surface elevation recorded, 1,776.58 feet June 18, 1933; 

minimum elevation, 1,755.53 feet Dec. 9, 1936.

Remarks.- No backwater effect from Kootenay Lake during year.

Gage height, In feet, water year Ofctober 1940 to September 1941

Day

1

Z

3

4

5

8

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

57.85

57. 7S

57.76

57.74

57.71

57.66

57.65

57.57

57.54

57.50

57.48

57.57

58.28

58.42

58.28

58.11

57.98

57.89

57.82

57.76

57.73

57.82

57.98

58.19

58.34

58.26

58.33

58.38

58.35

58.26

58.24

Nov.

58.15

58.11

58.03

57.95

57.88

57.81

57.75

57.72

57.72

57.65

57.52

57.32

57.22

56.95

56.76

56.91

56.65

57.06

57.10

57.03

57.06

57.27

57.08

57.14

57.21

57.18

57.16

57.16

57.21

57.24

-

Dec.

57.23

57.20

57.18

57.20

57.24

57.31

57.32

57.33

57.30

57.25

57.19

57.14

57.04

56.72

56.35

56.52

56.54

56.40

56.40

56.82

57.05

57.33

57.48

57.50

57.46

57.37

57.35

57.31

57.24

57.17

57.14

Jan.

57.28

57.00

56. SI

56.76

56.56

56.66

56.79

56.80

56.92

56.88

56.74

56.72

56.78

56.90

56.86

56.88

56.87

56.89

56.93

56.94

56.97

56.87

56.80

56.80

56.61

56.49

56.56

56.71

56.75

56.74

56.72

Feb.

56.75

56.74

56.74

56.75

56.76

56.81

56.83

56.66

56.62

56.62

56.63

56.67

56.70

56.69

56.67

56.57

56.43

56.38

-

-

_

,-

-

-

-

.

_

-

-

-

-

Mar.

_

_

57.44

57.42

57.36

57.32

57.35

57.40

57.45

57.43

57.38

57.30

57.25

57.21

57.19

57.19

57.36

57.55

57.62

_

-

-

-

-

.

-

-

-

-

-

Apr.

_

-

-

-

-

_

-

-

-

-

59.78

59.93

60.14

60.27

60.38

60.34

60.31

60.17

59.99

59.81

59.71

59.76

59.94

60.19

60.45

60.63

60.78

61.03

61.26

61.58

May

62.01

62.53

62.96

63.18

63.10

62.74

62.24

61.80

61.43

61.12

60.91

60.96

61.36

62.21

63.04

63.49

64.25

64.71

64.47

63.79

63.10

62.61

62.29

62.12

62.17

62.55

62.95

63.03

62.73

62.56

62.54

June

62.80

63.03

63.35

63.61

63.45

63.19

63.03

62.87

62.82

62.77

62.77

62.55

62.33

62.43

62.68

62.69

62.33

62.08

61.91

61.87

61.82'

61.55

61.21

60.94

60.94

61.20

61.39

61.31

61.01

60.80

-

July

60.79

60.80

60.74

60.60

60.48

60.45

60.40

60.24

60.09

60.03

59.87

59.67

59.52

59.45

59.27

59.19

59.14

59.15

59.24

59.35

59.33

59.24

59.09

58.97

58.85

58.74

58.67

58.57

58.51

58.49

58.50

Aug.

58.49

58.45

58.39

58.35

58.22

58.18

58.17

58.12

58.05

58.01

57.97

57.97

58.00

58.04

58.14

58.27

58.36

58.34

58.25

58.15

58.05

57.99

57.98

57.99

58.00

58.02

58.24

58.39

58.35

58.31

58.30

Sept.

58.23

58.20

58.18

58.26

58.34

58.41

58.60

58.65

58.69

58.65

58.62

58.72

58.95

59.12

59.30

59.44

59.36

59.47

59.90

60.24

60.13

59.91

59.70

59.50

59.38

59.38

59.43

59.55

59.71

59.65

-

Hote.- Add 1,700 feet to obtain elevation above mean aea level.
KOOTENAI RIVER BASIN 93

Kootenai River at Bonners Ferry, Idaho

Location.- Wire-weight gage, lat. 48°43'00", long. 116 0 18'45", in NEi sec. 37, T. 63 N., 

R. IE., on highway bridge at Bonners Ferry. Datum of gage Is 1,743.00 feet above mean 

sea level (U. S. Coast and Geodetic Survey).

Drainage area.- 13,000 square miles.

Records available.- October 1937 to September 1941. May to October 1904, at site threequarters of a mile downstream. Gage heights collected by U. S. Weather Bureau May 

1904 to September 1937.

Average discharge.- 13 years (1928-41), 12,970 second-feet.

Extremes.- Maximum dally discharge during year, 35,200 second-feet May 18; maximum elevatlon observed, 1 ? 758.70 feet May 18; minimum dally discharge, 3,100 second-feet 

Dec. 17 (estimated); minimum elevation observed, 1,742.64 feet Feb. 36.

1928-41: Maximum discharge, 99,800 second-feet June 18, 1933; Maximum elevation, 

1,774.98 feet June 19, 1933; minimum daily discharge, 1,300 second-feet, Feb. 8, 1936; 

minimum elevation, 1,741.14 feet Dec. 5, 1939.

Maximum water-surface elevation known, 1,777.3 feet in June 1894.

Remarks.- Records of discharge excellent except those for periods of ice effect or no 

gage-height record for Boom Camp, which are good. Gage at Bonners Ferry read twice 

dally. Backwater effect from Kootenay Lake during entire year at Bonners Ferry; none 

at Boom Camp. Discharge computed on basis of stage-discharge relation for station at 

Boom Camp. Discharge measurements are made at station near Bonners Ferry. No diversion or regulation above station.

Elevation, in feet, water jear October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

IS

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

46.80

46.82

46. BE

46.75

46.76

46.73

46.72

46.68

46.61

46.57

46.67

46.73

47.80

47.34

47.84

47.16

47.03

46.95

46.90

46.87

46.82

47.00

47.08

47.18

47.26

47.30

47.19

47.15

47.12

47.03

47.00

Nov.

46.94

46.91

46.86

46.82

46.74

46.68

46.68

46.72

46.67

46.63

46.56

46.42

46.32

46.15

46.04

45.94

45.92

46.06

46. OS

46.08

46.01

45.96

45.91

45.92

46.05

46.06

45.98

45.94

45.96

45.94

-

Dec.

45.90

45.84

45.76

45.72

45.68

45.68

45.77

45.76

45.76

45.74

45.72

45.84

45.74

45.59

45.42

45.38

45.39

45.47

45.50

45.60

45.68

45.80

45.89

45.88

45.86

45.70

45.60

46.52

45.42

45.36

45.33

Jan.

45.18

45.07

44.87

44.78

44.80

44.84

44.91

44.82

44.65

44.61

44.64

44.58

44.52

44.65

44.66

44.62

44.60

44.62

44.64

44.64

44.60

44.46

44.36

44.36

44.30

44.17

44.18

44.21

44.22

44.11

44.08

Feb.

44.02

43.98

43.99

43.97

43.96

43.96

43.88

43.80

43.72

43.63

43.62

43.64

43.60

43.54

43.44

43.34

43.16

43.11

43.10

43.12

43.02

43.04

43.08

43.00

42.80

42.68

42.76

42.84

-

_

-

Mar.

43.05

43.34

43.68

43.74

43.72

43.64

43.58

43.62

43.69

43.69

43.66

43.60

43.52

43.44

43.38

43.32

43.30

43.60

43.72

43.74

43.78

43.80

43.81

43.74

43.70

43.78

43.88

44. OS

44.21

44.49

45.01

Apr.

45.48

45.85

46.21

46.36

46.32

46.31

46.25

46.16

46.14

46.30

46.62

46.96

47.42

47.60

47.69

47.86

47.82

47.62

47.30

47.04

46.89

46.98

47.20

47.65

48.16

48.54

48.91

49.38

49.92

50.62

May

51.60

52.66

53.64

54.30

54.44

53.88

53.00

52.22

51.42

50.82

50.40

50.50

51.20

52.48

54.26

55.40

56.74

5S.62

58.32

57.20

56.01

54.98

54.26

53.85

53.79

54.22

54.92

55.26

54.93

54.58

54.56

June

54.94

55.40

5«.00

56.39

56.38

55.94

55.66

55.30

55.18

55.05

54.90

54.72

54.32

54.32

54.66

54.79

54.28

53.82

53.54

53.42

53.31

52.92

52.32

51.64

51.44

51.77

52.16

52. 08

51.64

51.12

July

51.02

50.97

50.88

50.78

50.61

50.74

50.90

50.88

50.70

50.60

50.47

50.21

50.00

49.84

49.72

49.74

49.76

49.76

49.76

49.92

49.85

49.68

49.59

49.59

49.44

49.36

49.28

49.18

49.12

49.10

49.16

Aug.

49.20

49.11

49.06

48.98

4S. 86

48.88

48.84

48.85

48.82

48.82

48.83

48.80

48.85

48.84

48.90

49.00

49.04

48.99

48.88

4S.82

48.78

48.76

48.76

48.74

48.72

48.76

48.86

48.90

48.92

48.87

48.87

Sept.

48.86

48.86

48.76

48.79

48.93

49.00

48.96

49.16

49.16

49.14

49.17

49.19

49.28

49.62

49.84

49.89

49.91

49.94

50.35

50.72

50.68

50.44

50.21

50.00

49.84

49.84

49.88

49.94

50.09

50.06

-

Kote.- Add 1,700 feet to obtain elevations above mean sea level.
KOOTENA.I RIVER BASIN

Discharge, in second-feet, of Kootenai River at Bonners Perry, Idaho, 

water year October 1940 to September 1941

Day

1 

2 

3

4 

5

6 

7 

8 

.9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

5,340 

5,180 

5,130 

5,090 

5,020

4,900 

4,880 

4,700 

4,640 

4,550

4,510 

4,700 

6,420 

6,800 

6,420

5,980 

5,660 

5,440 

5,270 

5,130

5,060 

5,270 

5,660 

6,180 

6,580

6,370 

6,560 

6,690 

6,610 

6,370 

6,310

Nov.

6,080 

5,980 

5,780 

5,580 

5,410

5,250 

5,110 

5,040 

5,040 

4,880

4,590 

4,170 

b3,750 

b3,300 

b2,850

bS.OOO 

3,240 

3,640 

3,720 

3,580

3,640 

03,650 

3,680 

3,800 

3,940

3,880 

3,840 

3,840 

3,940 

4,000

Deo.

3,980 

3,920 

3,880 

3,920 

4,000

4,150 

4,170 

4,190 

4,120 

4,020

3,900 

b3,500 

b2,900 

b2,400 

b2 , 200

b2,150 

b2,100 

b2,200 

b3,350 

b3,050

3,620 

4,190 

4,510 

4,550 

4,460

4,270 

4,230 

4,150 

4,000 

3,860 

3,800

Jan.

bS.800 

b3,400 

b3,100 

b3,000 

2,810

2,990 

b3,040 

3,240 

b3,250 

b3,200

3,170 

3,100 

3,200 

3,430 

3,350

3,390 

3,370 

3,410 

3,490 

3,510

3,560 

3,370 

3,240 

3,240 

2,900

2,690 

2,810 

3,080 

3,150 

3,130 

3,100

Month

Octc 

Novt 

Dece

Ce

Jam 

Feb 

Hare 

Apn 

May 

June 

Julj 

Augi 

Sep1

Ma

jmber ......................

ilendar year 1940 .........

lary

ember .....................

ter year 1940-41 ..........

Feb.

3,150 

3,130 

3,130 

3,150 

3,170

b3,100 

b3,050 

2,990 

2,920 

2,920

2,930 

3,010 

3,060 

3,040 

3,010

2,830 

2,590 

a2,620 

a2,770 

a2,780

a2,780 

a2,840 

a2,980 

a3,030 

a2,740

a2, 540 

a2, 800 

a2,880

Second 

foot-days

173,420 

128,200 

112,740

3,825,810

99,520 

81,940 

148,760 

366,470 

729,500 

647,000 

325,140 

195,140 

273,130

3,280,960

Mar.

83,310 

a3,880 

a4,450 

4,530 

4,480

4,360 

4,270 

4,340 

4,440 

4,550

4,510 

4,400 

4,230 

4.120 

4,040

4,000 

4,000 

4,360 

4,770 

4,930

a5,050 

a5,170 

a5,210 

a5,050 

a4,960

a5,150 

a5,420 

a5,800 

a6,190 

a6,850 

87,940

Maximum

6,800 

6,080 

4,550

55,100

3,800 

3,170 

7,940 

18,400 

35,200 

28,700 

15,100 

7,130 

12,900

35,200

Apr.

88,780 

89,490 

ftlO.600 

alO,700 

alO.500

810,500 

alO,300 

alO.100 

alO.100 

alO,400

11,200 

11,700 

12,500 

13,000 

13,400

13,300 

13,100 

12,600 

11,900 

11,300

10,900 

11,100 

11,800 

12,700 

13,700

14,400 

15,000 

16,000 

17, -000 

18,400

May

20,300 

22,800 

25,100 

26,300 

25,800

23,900 

21,400 

19,400 

17,700 

16,400

15,500 

15,700 

17,400 

21,300 

25,500

28,000 

32,400 

35,200 

33,800 

29,700

25,800 

23,300 

21,700 

20,800 

21,100

23,000 

25,000 

25,400 

23,900 

23,000 

22,900

Minimum

4,510 

2,850 

2,100

2,000

2,690 

2,540 

3,310 

8,780 

15,500 

15,100 

7,130 

5,760 

6,290

2,100

June

24,200 

25,400 

27,200 

28,700 

27,800

26,300 

25,400 

24,600 

24,300 

24,100

24,100 

23,000 

21,900 

22,400 

23,600

23,700 

21,900 

20,700 

19,900 

19,700

19,500 

18,200 

16,800 

15,600 

15,600

16,700 

17,500 

17,200 

15,900 

15,100

Mean

5,594 

4,273 

3,637

10,450

3,210 

2,926 

4,799 

12,220 

23,530 

21,570 

10,490 

6,295 

9,104

8,989

July

15,000 

15,100 

14,800 

14,300 

13,800

13,700 

13,500 

12,900 

12,300 

12,100

11,500 

10,800 

10,300 

10,100 

9,470

9,220 

9,060 

9,090 

9,380 

9,740

9,670 

9,380 

8,900 

8,530 

8,170

,850 

,640 

,360 

,190 

,130 

,160

Per 

square 

mile

0.430 

.329 

.280

.804

.247 

.225 

.369 

.940 

1.81 

1.66 

.807 

.484 

.700

.691

Aug.

7,130 

7,020 

6,850 

6,740 

6,390

6,290 

6,260 

6,130 

5,960 

5,860

5,760 

5,760 

5,830 

5,930 

6,180

6,530 

6,770 

6,720 

6,480 

6,210

5,960 

5,800 

5,780 

5,800 

5,830

5,880 

6,450 

6,850 

6,740 

6,640 

6,610

Sept.

6,420 

6,340 

6,290 

6,500 

6,720

6,910 

7,440 

7,580 

7,700 

7,580

7,500 

 7,790 

8,470 

8,990 

9,570

16,000 

9,770 

10,100 

11,600 

12,900

12,500 

11,700 

10,900 

10,200 

9,830

9,830 

10,000 

10,400 

10,900 

10,700

Runoff

Inches

0.50 

.37 

.32

10.94

.28 

.23 

.43 

1.05 

2.09 

1.85 

.93 

.56 

.78

9.39

Ac re- feet

344,000 

254,300 

223,600

7,588,000

197,400 

162,500 

295,100 

726,900 

1,447,000 

1,283,000 

644,900 

387,100 

541,700

6,508,000

a No gage-height record for station at Boom Camp; discharge computed from the stage-fall-discharge 

relation of the "at Bonners Perry-near Bonners Perry1* reach. 

b Stage-discharge relation affected by ice.
KOOTENAI RIVER BASIN 95

Kootenal River near Bonners Ferry, Idaho

Location.- Water-stage recorder, lat. 48°41'55", long. 116 020'40", in NWt sec. 28, T., 

6ii H -> R- IE., 1.6 miles downstream from highway bridge at Bonners Ferry. Datum of 

gage Is 1,700.00 feet above mean sea level (U. S. Coast and Geodetic Survey datum).

Drainage area.- 13,000 square miles.

Records available.- May 1928 to September 1941.

Extfem?o-~ Maxlraum water-surface elevation during year, 1,758.22 feet May 18; minimum, 

1 t 742 lo i©3t F©b. 2V 

1928-41: Maximum water-surface elevation, 1,774.17 feet June 20, 1933; minimum, 

1,740.23 feet Mar. 11, 17, 1939.

Remarks^- Elevations affected by backwater from Kootenay Lake.

Elevation, In feet, water year October 194O to September 1941

D«y

i

s

3

4

6

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

46.62

46.71

46.62

46.59

46.61

46.60

46.60

46.56

46.48

46.40

46.64

46.59

46.99

47.12

47.03

46.93

46. S3

46.76

46,73

46.73

46.70

46.88

46.93

47.00

47.06

47.11

47.00

46.97

46.88

46.80

46.78

HOT.

46.70

46.69

46.66

46.62

46.57

46.51

46.45

46.49

46.61

46.52

46.46

46.36

46.21

46.07

46.02

46.00

45.96

46.07

46.01

45.96

46.96

45.93

45.86

45.90

45.91

45.87

45,86

46.84

45. S3

46.82

-

Dec.

45.77

45.72

45.65

45.62

45.55

45.53

45.63

45.63

45.64

45.65

45.57

45,42

45.29

45.11

44.97

44.86

44.77

44.79

44.80

44.91

45.06

45.18

45.33

45.35

45.32

45.25

45.27

45.22

45.17

45.11

45. 06

Jan.

44.9S

44.77

44.63

44.55

44.58

44.59

44.63

44.59

44.53

44.45

44.40

44.36

44.35

44.43

44.37

44.35

44.33

44.34

44.38

44.38

44.37

44.87

44.17

44,16

44.04

43.99

43.99

44.00

43.99

43.90

43.88

Feb.

43. 84

43.76

43.76

43.72

43,68

43.62

43.56

43.52

.43.42

43.35

43.33

43.29

43.24

43.20

43.11

43.00

42.88

42.78

42.72

42.67

42.61

42.61

42.62

42.4S

42.31

42.22

42.22

42.30

_

_

-

Mar.

42.43

42.65

42,96

43.02

42.98

42.91

42.86

42.91

43,00

42.99

42.94

42.86

42.80

42.73

42.67

42.60

42.50

42.46

42.73

42.86

42.88

42.86

42.85

42.79

42.76

42.82

42.88

42.97

43.16

43.42

43.96

Apr.

44.51

44.91

45.22

45.41

45.40

45.38

45.34

45.24

45.21

45.40

45.67

46.04

46.57

46.83

47.00

47.11

47.11

46.91

46.60

46.28

46.10

46.1S

46.45

46.91

47.42

47.86

48.18

48.73

49.28

49.95

Hay

5O.S9

52.09

53.08

53.76

53.89

53.37

52.50

51.62

5O.92

5O.35

49.92

49.94

50.61

51.91

53.60

54.77

56.54

5S.14

57.79

56.77

55.61

54.63

53.37

53.48

53.38

53.84

54.48

54.82

54.51

54.20

54.18

June

54.55

64.91

55.43

65.96

55.92

55.51

55.18

54.85

54.75

54.65

54.59

54.30

53.89

53.93

54.25

54.42

53.88

53.44

53.2O

53. 05

52.94

52.52

61.35

51.27

61.03

51.41

61.70

61.65

51.17

50.73

July

50,51

60.56

50.46

50.32

50.23

50.40

50.57

50.54

50.37

50.32

5O.18

49.94

49.75

49.62

49.50

49.51

49.55

49.55

49.58

49.65

49.60

49.44

49.35

49.42

49.26

49.17

49.06

49.00

48.92

4S. 91

48.99

Aug.

49.00

4S. 95

48.93

4S.81

48.78

48.75

48.71

48.69

48.65

43,63

48.70

48.65

43.71

48.71

48.69

48.38

43.93

48.86

48.74

48.63

48.65

48.63

48.63

43.64

43.67

43.61

48.71

48.80

48.77

48.73

48.74

Sept.

48.71

43.74

48.58

43.65

48.78

48.91

49.02

49.00

48.98

48.97

49.00

49.05

49.17

49.42

49.62

49.66

49,68

49.70

50.05

50.44

50.42

50.18

49.98

49.77

49.62

49.64

49.64

49.73

49.87

49.80

-

Hote.- Add 1,70O feet to obtain elevation above mean sea level
96 KOOTENAI RIVER BASIN

Kootenai River at Klockraann Ranch, near Bonners Ferry, Idaho

Location.- Water-stage recorder, lat. 48°47'4011 , long. II6°22'50", in SEi sec. 19, T. 63 

N., R. IE., at Klockmann Ranch, 800 feet south of viaduct on Kootenai Valley branch of 

Great Northern Ry. and 8 miles north of Bonners Ferry. Datum of gage is 1,700.00 feet 

above mean sea level (U. S. Coast and Geodetic Survey).

Records available.- May 1928 to September 1941.

Extremes. T Maximum water-surface elevation during year, 1,756.43 feet May 18; minimum, 

 1,741.82 feet Mar. 18.

1928-41: Maximum water-surface elevation, 1,771.24 feet June 20, 1933; minimum, 

1,739.11 feet Mar. 18, 1939.

Remarks.- Elevations affected by backwater from Kootenay Lake.

llevatlon. In feet, water year October 1940 to September 1941

Dmy

1

2

3

4

5

6

7

8

9

10

11

12

IS

14

16

16

17

18

19

20

21

22

23

24

25

26

27

28

29

SO

31

Oct.

46.31

46.39

46.34

46.39

46.30

46.30

46.30

46.27

46.22

46.17

46.29

46.34

46,60

46.68

46.64

46.57

46.49

46(45

46.44

46.45

46.46

46.59

46.61

46.62

46.66

46.69

46.58

46.53

46.45

46.40

46.38

Kov.

46.32

46. 52

46.30

46.28

46.25

46.30

46.17

46.19

46.33

46.25

46.31

46.12

45.97

45.88

45.83

45.79

45.75

45.82

45.75

45.71

45.70

45.66

45.61

45.62

45.61

45.59

45.57

45.55

45.54

45.54

-

Dec.

45.60

45.47

45.41

45.39

45.34

45.36

45.38

45.38

45.40

45.42

45.33

45.19

45.09

44.95

44.84

44.74

44.66

44.65

44.63

44.69

44.75

44.80

44.90

44.90

44.89

44.84

44.88

44.83

44.80

44.75

44.72

Jan.

44.66

44.59

44.42

44.36

44.35

44.34

'44.35

44.30

44.23

44.19

44.13

44.09

44.07

44.12

44.06

44.03

44.00

44.01

44.04

44.03

44.02

43.95

43.86

43.84

43.77

43.75

43.74

43.73

43.71

43.64

43.61

Feb.

43.59

«3.52

43.52

43.48

43.43

43.37

43.30

43.27

43.19

43.13

43.09

43.05

42.99

42.95

42.86

42.76

42.67

f42.56

42.49

42.43

42.36

42.36

42,34

43.30

42.07

41.99

41.96

f41.99

_

_

-

JUT.

b.42.11

n«e.8i

b.42,42

b.43.46

b.42.43

b.42.38

h42.34

43.39

42.43

42.41

42.36

42.28

43.26

42.21

42.16

42.08

41.97

41.92

42.07

43.13

42.13

42.09

42.09

43.03

41.99

41.99

43.01

43.04

42.15

42.30

42.70

Apr.

43.14

43.46

43.74

43.89

43.94

43.95

43.91

43.85

43.83

43.98

44.21

44.52

45.01

45.25

45.44

45.56

45.57

45.41

45.17

44.91

44.77

44.84

45.07

45.46

45.91

46.32

46.65

47.17

47.72

48.37

««T

49.30

50.39

51.28

51.88

52.06'

51.68

50.94

50.19

49.57

49.07

48.70

48.70

49.32

50.42

51.91

53.04

54.74

56.34

56.05

55.14

54.09

53.23

52.54

52.18

52.08

52.39

52.94

53.25

53.05

52.78

52.75

Jim*

53.07

53.40

53.83

54.33

54.34

64.00

53.70

53.41

53.31

53.21

53.14

52.92

52.58

52.58

52.84

53.01

53.57

52.17

51.95

51.82

51.72

51.38

50.79

50.30

50.03

50.29

50.52

50.48

50.10

49.70

July

49.56

49.50

49,40

49.34

49.32

49.54

49.77

49.77

49,65

49.60

49.50

49.31

49.15

49.05

48.97

49.01

49.05

49.05

49.07

49.10

49.06

48,93

48.87

48.97

48. S3

48.77

48.68

48.62

43.57

48.55

48.62

Aug.

48.65

48.60

48.57

48.47

48.45

48.43

48,39

48.38

48.36

48.39

48.42

48.37

48.42

48.41

4S.46

48.53

48.57

48.51

48.40

48.36

48.35

48.37

48.34

48,35

48.35

48.29

48.37

48.45

48.42

48.41

48.42

Sept.

48.41

48.45

48.33

48.36

48.46

48.59

48.65

48.62

48.59

48.59

48.63

48.65

48.74

48.94

49.10

49.11

49.14

49.14

49.38

49.67

49.66

49.49

49.35

49.19

49.08

49.10

49.10

49.14

49.23

49.19

-

Note,- Add 1,700 feet to obtain elevation above mean sea level.

f Mean dally gage heights computed on basis of partial traoe, staff observations, and records for 

adjacent Kootenai River stations.

h Computed from mean of twioe-daily staff-gage observations.
KOOTENAI RIVER BASIN 97

Kootenal River near Copeland, Idaho 

(International gaging station)

Location.- Water-stage recorder, lat. 48°54'45", long. 116°25'00", in NWiNWiSWi sec. 12, T. 

64 N., R. 1 W., at Andrews Ranch, three-quarters of a mile downstream from Mission 

Creek and 1* miles northwest of Copeland. Datum of gage is 1,700.00 feet above mean 

sea level (U. S. Coast and Geodetic Survey).

Drainage area.- 13,400 square miles.

Kecoraa available.- October 1927 to September 1941 (gage-height record only prior to my 

1929) in reports of Geological Survey. April 1925 to September 1927 (gage heights only) 

in reports of Dominion Water and Power Bureau, Department of Mines and Resources, Canada.

Average discharge.- 12 years, 13,500 second-feet.

Extremes.- naxiium daily discharge during year, 36,500 second-feet May 18; maximum elevatlon, 1,754.00 feet May 18; minimum dally discharge, 2,200 second-feet Dec. 17, during 

ice period; minimum elevation, 1,741.54 feet Mar. 28.

1929-41: Maximum dally discharge, 90,500 second-feet June 19, 1933; maximum elevation, 1,767.98 feet June 20, 1933; minimum daily discharge, 1,350 second-feet Feb. 8, 

1936, during ice period; minimum elevation, 1,738.94 feet Mar. 18, 1939.

Remarks^- Records of discharge good except those for periods of Ice effect, Nov. 14 to 

Feb."28'(computed on basis of five discharge measurements and records for station at 

Bonners Ferry, intervening inflow, and channel storage), which are fair. Discharge computed from mean elevation-conveyance curve determined on basis of fall in reach between 

station at Klockmann Ranch near Bonners Ferry and station at Port Hill and discharge 

measurements made at station near Copeland. Stage-discharge relation affected by backwater from Kootenay Lake.

Cooperation.- This station is one of the internation gaging stations maintained by the 

United States under agreement with Canada.

Elevation , In feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

46.19

46.27

46.22

46.19

46.21

46.21

46.20

46.18

46.13

46.08

46.20

46.24

46.44

46.50

46.47

46.42

46.36

46.33

46.34

46.36

46,39

46.49

46.48

46.46

46.47

46.46

46.37

46.30

46.23

46.19

46.17

Nov.

46.13

46.14

46.14

46.13

46.11

46.08

46.06

46.09

46.21

46.14

46.12

46.05

45.93

45.85

45. SO

45.75

45.71

45,74

45,69

45.65

45.63

45.59

45.53

45.53

45.51

45.49

45.47

45.45

45.43

45.43

-

Deo.

45.40

45.36

45.33

45.32

45.28

45.28

45.30

45.31

45.32

45.32

45.27

45,15

45.05

44.93

44. 84

44.74

44.66

44.63

44.59

44,62

44.66

44.67

44.73

44.74

44,72

44.70

44.73

44.69

44.66

44.64

44.61

Jan.

44. 58

44.49

44.40

44.34

44.31

44.30

44.29

44,24

44.19

44.13

44.07

44.03

44.01

44,01

43.97

43.93

43.90

43.90

43.92

43.92

43. S9

43,83

43.75

43.71

43.69

43.68

43.67

43.65

43.64

43.58

43.56

Feb.

43.52

43.46

43.46

43.42

43.37

43.32

43.26

43.21

43.15

43.07

43,04

42.98

42.94

42.66

42.80

42.71

42.63

42.54

42.46

42.40

42.33

42.30

42.26

42.13

42.03

41,95

41.92

41.95

_

_

-

' Mar.

41.99

42.05

42.17

42,22

42.20

42.17

42.14

42.18

42.21

42.17

42.13

42.06

42.06

42.02

41.97

41.89

41.77

41.71

41.79

41.82

41.79

41.74

41.73

41.69

41.65

41.61

41.58

41.56

41.59

41.66

41.91

Apr.

42.19

42.41

42.60

42.71

42.77

42.78

42.76

42.73

42.72

42.83

43.00

43.23

43.63

43.62

44.00

44.12

44.14

44,05

43.90

43.73

43.65

43.71

43.88

44.18

44.53

44.86

45.16

45.56

46.02

46.57

-

May

47.35

48.35

49.15

49.72

49.94

49.72

49.17

48.61

48.14

47.77

47.51

47.53

47.99

48.81

49.94

50.88

52.47

53,92

53.68

53.02

52.24

51.53

50.99

50.70

50.62

50.80

51.16

51.42

51.32

51.11

51.11

June

51.35

51.60

51.94

52.33

52.39

5E.16

51.92

51.68

51.61

51.53

51.47

51.32

51.09

51.07

51.23

51.37

51.06

50.76

50.63

50.51

50.40

50.13

49.67

49.29

49.03

49.18

49.30

49.27

46.99

48.67

-

July

48.54

48.47

48.38

48.39

48.48

48.73

49.01

49.08

49.01

48.99

48,92

48.79

48.68

48.59

48.57

48.64

48.70

48,69

48.69

48.69

48.65

48.54

48.52

48.62

48.56

48.52

48.45

46.41

48.36

48.36

48.44

Aug.

4S.45

48.40

48.37

48.30

48.29

48.28

48.24

48.24

48.23

48.28

46.30

48.26

48.30

48.29

48.32

48.37

48.39

48.33

46.24

48.22

48.23

48.27

48.24

48.24

46.23

48.16

48.21

48.25

48.24

48.23

48.24

Sept.

48.24

46.28

48.17

48.19

48.28

48.39

48.42

48.38

48.36

48.35

48.40

48.42

48.46

48.63

48.72

48.72

48.75

48.74

48.88

49.05

49.05

48.95

48.87

48.77

48.68

48.71

48.70

48.72

46.77

48.72

-

Note.- Add 1,700 feet to obtain elevation above mean sea level.
98 KOOTENAI RIVER BASIN

Discharge, in second-feet, of Kootenai River near Copeland, Idaho, 

water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

5,420

5,360

5,260

5,070

4,990

4,900

4,990

4,890

4,690

4,580

4,620

4,910

6,250

6,670

6,500

6,080

5,730

5,470

5,300

5,120

4,850

5,340

5,690

6,110

6,430

6,740

6,630

6,750

6,580

6,330

6,400

Nov.

6,150

5,990

5,830

5,660

5,490

5,230

5,040

4,950

5,260

5,060

4,780

4,570

3,950

3,360

3,020

3,020

3,300

3,670

3,920

3,640

3,710

3,750

3,740

3,880

4,040

3,980

3,910

3,910

4,040

4,100

-

Dec.

4,100

4,030

4,000

4,030

4,150

4,210

4,270

4,220

4,260

4,100

4,040

3,680

S.990

S.550

2,340

S,290

2,200

2,240

2,480

S,990

3,840

4,420

4,690

4,720

4,650

4,430

4,380

4,300

4,150

4,030

3,940

Jan.

3,950

3,570

3,270

3,060

2,900

3,060

3,140

3,380

3,330

3,380

3,280

3,2EO

3,260

3,520

3,470

3,510

3,490

3,480

3,600

3,640

3,690

3,590

3,300

3,380

3,090

2,790

2,970

3,160

3,310

3,280

3,230

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

3,320

3,220

3,250

3,270

3,290

3,260

3,190

3,140

3,090

3,050

3,040

3,190

3,190

3,220

3,180

3,010

2,790

2,800

2,940

2,920

2,890

2,880

3,230

3,220

2,970

2,650

2,870

2,950

_

_

-

Second 

foot-days

174,650

130,940

116,720

3,952,080

103,280

86,020

157,410

381,520

752,600

666 ,700

334,460

198,630

276,960

3,379,890

Mar.

3,700

4,030

4,830

4,890

4,770

4,600

4,530

4,650

4,830

4,870

4,690

4,620

4,500

4,320

4,250

4,330

4,240

4,390

4,950

5,170

5,360

5,390

5,430

5,270

5,300

5,530

5,800

6,150

6,640

7,180

8,200

Maximum

6,750

6,150

4,720

53,400

3,950

3,320

8,200

18 ,600

36,500

29,200

15,300

7,320

12,800

36,500

Apr.

9,320

10,100

10,800

11,100

11,100

11 ,000

10,900

10,700

10,700

11 ,000

11,500

12,100

13 ,000

13 ,500

13 ,800

13 ,800

13,800

13 ,400

12,700

12,100

11,600

11,900

12,200

13,000

14 ,000

14,800

15,300

16,300

17,400

18,600

May

20 ,500

22,900

25,100

26,400

26 ,500

25,100

22,700

20,300

18,500

17,000

15,900

15 ,700

17,400

20,500

25,000

28,100

31,900

36,500

35,500

32,000

28,200

25,400

23,300

22,100

21,800

23,100

25 ,300

26,200

26,300

24,300

24,100

Minimum

4,580

3,020

2,200

2,070

2,790

2,650

3,700

9,320

15 ,700

15,500

7,100

5,730

6,390

2,200

June

25 ,000

26,100

27,500

29 ,200

28,900

27,600

26,400

25,500

25,100

24,900

24,700

24,000

22,700

22,800

23 ,800

£4,300

22,800

21,400

20,600

20,200

20,200

19,300

17,600

16,100

15,600

16,700

17,800

17 ,800

16,600

15,500

-

Me&n

5,634

4,365

3,765

10,800

3,332

3,07E

5,078

12.7EO

24,280

22,220

10,790

6,407

9.23E

9,260

July

15,300

15,300

15,100

14 ,700

14,000

13,900

13,900

13,300

12,800

12,500

12,000

11,300

10,700

10,400

9,720

9,380

9,250

9,320

9,630

10,100

10,100

9,770

9,310

9,280

8,460

8,030

7,750

7,470

7,370

7,100

7,220

Per

square 

mile

0.420

.326

. 283.

.806

.249

.229

.379

.949

1 *81

1.66

.805

.478

.689

.691

Aug.

7,320

7,£

7,£

6,£

'10

.80

10

6,530

6,430

6,4

6,!

5,£

10

220

30

5,750

5,850 5,"

5,£

5,£

'40

60

50

6,350

6,560

6, c

6,f

6,4

330

!20

120

6,220

6, ISO

5,£ 5, r

5,S

40 '30

30

6,120

6,200

6,£

7,C 6, r

6,"

>90

60 '90

'80

6,790

Sept.

6,610

6,530

6,390

6,490

6,810

7,200

7,740

7,800

7,790

7,790

7,730

7,820

8,490

9,050

9,720

10,100

10,000

10,000

11,300

12,800

12,700

12,000

11,200

10,400

10,100

10,100

10,100

10,400

10,900

10,900

Runoff

Inohes

0.48

.36

.32

10,97

.29

.24

.44

1.06

2.09

1.85

.93

.56

.77

9.38

Ao re- feet

346 ,400

259,700

231,500

7,839,000

204,900

170,600

312,200

756,700

1,493,000

1,322,000

663 ,400

394,000

549,300

6,704,000
KOOTENAI RIVER BASIN 99

Kootenai River at Port Hill, Idaho 

(International gaging station)

Location.- Water-stage recorder, lat. 49°00'00", long. 116°30 1 10", in SWi 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, U. S. Coast and Geodetic Survey datum, and 1,699.80 

feet above mean sea level, datum of Geodetic Survey of Canada (adjustment of 1928).

Drainage area.- 13,700 square miles.

Records available.- May to July 1904, October 1927 to April 1928 (gage heights only) and 

April 1928 to September 1941 in reports of Geological Survey. October 1924 to September 1927 (gage heights only) in reports of Dominion Water and Power.Bureau, Department 

of Mines and Resources, Canada.

Average discharge.- 13 years, 13,700 second-feet.

Extremes.- Maximum daily discharge during year, 38,800 second-feet May 18; maximum elevation, 1,751.79 feet May 18; minimum daily discharge, 2,240 second-feet Dec. 17; minimum elevation, 1,741.16 feet Mar. 28.

1928-41: Maximum daily discharge, 93,200 second-feet June 19, 1933; maximum elevation, 1,764.08 feet May 31, 1938; minimum dally discharge, 1,380 second-feet Feb. 8, 

1936; minimum elevation, 1,738.69 feet Mar. 18, 1939.

Maximum elevation known, 1,772.7 feet sometime in June 1894.

Remarks.- Records of discharge good except those for Nov. 14 to Feb. 28, during period of 

ice effect at Copeland, which are fair. Daily discharge, which represents the entire 

flow passing international boundary, computed by adding tributary inflow, including 

that of Boundary Creek, to flow at station near Copeland. Boundary dike of Reclamation 

Farm and Forest Service roadway dike (south side of Boundary Creek; remained intact 

and flow of river was confined throughout the year to main channel upon which gage and 

cableway are located. Elevations affected by backwater from Kootenay Lake.

Cooperation.- This station is one of the International gaging stations maintained by United 

States under agreement with Canada.

Elevation, in feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

45.93

46.02

45. 9S

45,95

45.97

45. 9S

45.97

45.95

45.92

45.88

46.00

46.02

46.13

46.16

46.14

46.12

46.08

46.07

46.08

46.11

46.15

46.23

46.21

46.17

46.17

46.16

46.06

45.99

45.93

45.91

45.88

Nov.

45.85

45. S7

45.87

45.87

45.86

45.64

45. S3

45.86

45.97

45.91

45.90

45. S3

45.74

45.67

45.62

45.57

45.53

45.55

45.50

45.46

45.45

45.40

45.35

45.35

45.33

45.30

45.27

45.25

45.23

45.22

-

Dec.

45.18

45.15

45.12

45.09

45.07

45.07

45. OS

45.08

45.11

45.10

45.03

44.94

44.86

44.76

44.68

44. 5S

44.50

44.46

44.41

44.42

44.45

44.44

44.48

44.48

44.47

44.45

44.49

44.45

44.43

44.41

44.39

Jan.

44-36

44.28

44.22

44.16

44.12

44.08

44.07

44.02

43.96

43.92

43.88

43.83

43.79

43.80

43.75

43. 7S

43.67

43.63

43.69

43.68

43.66

43.63

43.56

43.52

43.49

43.49

43.47

43.44

43.42

43.36

43.33

Feb.

43. 2S

43.23

43.22

43. IS

43.14

43.09

43.03

42.98

42.92

42.86

42.82

42.75

42.71

42.66

42. 5S

42. 4S

42.41

42.32

42.25

42.19

42.13

42.11

42.05

41.93

41.84

41.75

41.72

41.73

n

_

-

Mar.

41.76

41.81

41.89

41.92

41.91

41.89

41.86

41.89

41.90

41.87

41.85

41.78

41.78

41.76

41.72

41.62

41.52

41.44

41.49

41.51

41.47

41.42

41.41

41.38

41.33

41.28

41.24

41.19

41.19

41.22

41.40

Apr.

41.59

41.74

41.87

41.96

42.02

42.05

42.04

42.02

42.01

42.10

42.23

42.43

42.73

42. S9

43.04

43.17

43.19

43.14

43.04

42.92

42. SS

42.89

43.08

43.31

43,53

43.85

44.13

44.48

44.88

45.36

-

May 1 June

46.05

46.83

47.46

47.93

4S.15

48.04

47.69

47,33

47.00

46.74

46.55

46.60

46.97

47.59

48.39

49.13

50.56

51.72

51.56

51.18

50.60

50.11

49.70

49.50

49.44

49.54

49.74

49.93

49.90

49.77

49.79

49.99

50.17

50.41

50.68

50.76

50.63

50.49

50.32

50.28

50.21

50.15

50.03

49.39

49.87

49.97

50.07

49.84

49.64

49.55

49.47

49.35

49.13

48.77

48.49

48.26

48.33

48.37

48.33

48.13

47.88

-

July

47.76

47. 63

47.60

47.66

47. SI

48.11

48.41

43.50

4S. 46

43.45

48.41

48.32

48.24

48.17

4S.1S

48.27

48.33

4S.32

43.30

4S.27

48.23

49.13

48.13

48.24

48.20

48.19

48.13

48.10

48.06

48.07

48.13

Aug.

48.15

43.11

48.07

48.02

48.03

48.02

47. 93

47.99

48.00

4S.05

48.07

48.03

48.06

48.06

43.06

4S.11

48.11

48.06

47.99

47.97

47.97

48.01

48.00

47.99

47.97

47.90

47.94

47.97

47.97

47.96

47.97

Sept.

47.98

48.03

47.92

47.94

48.01

48.10

48.10

43.06

48.03

48.03

48.08

48.09

48.10

4S. 24

48.32

48.28

48.32

48.32

48.39

48.48

48.48

48.41

48.37

48.32

48.25

48.27

48.27

48.27

48.29

48.24

-

Note.- Add 1,700 feet to obtain elevation above mean sea level.
100 KOOTENAI RIVER BASIN

Discharge, in second-feet, of Kootenai River at Port Hill, Idaho, 

water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9 

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

5,450

5,410

5,300

5,110

5,030

4,940

5,030

4,930

4,720 

4,680

4,710

4,980

6,310

6,730

6,550

6,130

5,780

5,520

5,350

5,170

4,960

5,440

 5,760

6,210

6,810

6,940

6,790

6,880

6,700

6,460

6,540

Nov.

6,280

6,100

5,940

5,750

5,570

5,320

5,140

5,050

5,350 

5,140

4,820

4,600

3,980

3,400

3,060

3,070

3,350

3,730

3,980

3,700

3,770

3,800

3,800

3,940

4,090

4,040

3,970

3,970

4,100

4,160

-

Dec.

4,160

4,080

4,060

4,100

4,240

4,310

4,360

4,310

4,330 

4,150

4,080

3,710

3,020

2,580

2,370

2,330

2,240

2,290

2,550

3,080

4,110

4,800

4,960

4,840

4,760

4,640

4,480

4,400

4,240

4,120

4,030

Jan.

4,030

3,630

3,320

3,100

2,960

3,120

3,210

3,450

3,400 

3,440

3,340

3,280

3,320

3,590

3,540

3,580

3,560

3,550

3,670

3,710

3,760

3,660

3,370

3,450

3,160

2,860

3,030

3,230

3,380

3,340

3,300

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year ..........

Feb.

3,390

3,290

3,320

3,340

3,360

3,330

3,260

3,210

3,160 

3,120

3,110

3,260

3,260

3,280

3,240

3,070

2,850

2,860

3,010

3,000

2,960

2,950

3,300

3,290

3,040

2,720

2,940

3,050

_

_

-

Seoondfoot-days

177 , 260

119)630

4,083-flfin

nfi .S5O

~87^970

164,890

408,100

798 ,100

684,400

340,300

200,540

286,170

3,505,680

Mar.

3,860

4,280

5,130

5,120

4,970

4,780

4,710

4,840

5,020 

5,050

4,860

4.79O

4,650

4,480

4,420

4,490

4,410

4,670

5,230

6,420

5,600

5,620

5,650

5,490

5,530

5,790

6,070

6,460

6,990

7,650

8,860

Maximum

6.94C

6.28C

4.96C

54,60C

4.03C

3,39C

8,86C

20,20C

38.80C

30.10C

15.70C

7,39C

13,30C

38 ,80C

Apr.

10,000

10,800

11,400

11,700

11,700

11,600

11 ,500

11,300

11,300 

11,700

12,300

13,000

13,900

14,400

14,800

14,700

14,600

14,100

13,400

12,800

12,500

12,900

13,200

14,100

15,100

16,000

16,600

17,700

18 ,800

20,200

May

22,500

24,900

26,800

27 ,900

27,900

26,200

23,700

21,200

19,300 

17,800

16,900

17,200

18,900

22,200

26,400

30,000

36,500

38,800

37,100

33,400

29,600

26,700

24,600

23,500

23,200

24,300

26,300

27,200

26,300

25,400

25 ,400

Minimum

4,620

3,060

2,240

) 2,140

2,860

2,720

3,860

10,000

16 ,900

15,900

7,180

5,780

6,490

2,240

June

26,200

27 ,100

28,400

30,100

29 ,700

28,300

27,100

26,200

25,800 

25,500

25,200

24,500

23 ,100

23,200

24,200

24 ,700

23,200

22,000

21,300

20,900

20,700

19,800

18,000

16 ,500

16,100

17,100

18,200

18,300

17,100

15,900

-

Mean

5,718

4,432

3,859

11,100

3,398

3,142

5,319

13,600

26 ,750

22,810

10,980

6,469

9,639

9,606

July

16,700

15,700

15,400

15,100

14,300

14,200

14,200

13,600

13,000 

12,700

12,200

11,500

10,900

10,600

9,880

9,530

9,400

9,480

9,770

10,200

10,200

9,880

9,420

9,390

8,580

8,130

7,840

7,560

7,460

7,180

7,300

Per

square 

aile

0.417

 32^

005 c"°*

.810

.248

.229

.388

.993

1.88

1.66

.801

.472

.696

.701

Aug.

7,390

7,

7,

6,

380

360

390

6,600

6,500

6,

6,

470

280

5,990 

5,810

5,900

5,

6,

5,

300

DID

910

6,410

6,620

6,

6,

6,

380

B70

470

6,270

6,160

5,

5,

5,

990

780

980

6,170

6,250

6,

7,

6,

6,

580

160

370

B40

6,860

Sept.

6,680

6,620

6,490

6,750

7,010

7,340

7,890

7,920

7,910 

8,070

8,110

8,200

8,930

9,650

10,300

10,600

10,400

10,400

11,900

13,300

13,200

12,400

11,500

10,700

10,400

10,400

10,300

10,600

11,100

11,100

-

Runoff

Inches

0.48

.36

.33

11.03

.29

.24

.46

1.11

2.17

1.86

.92

.54

.78

9.52

Acre-feet

351,600 

263,700

237 ,300

8,060,300

209,000

174,500

327,100

809,500

1 ,583 ,000

1,357,000

675 ,000

397,800

567,600

6,953,000
KOOTENAI RIVER BASIN 101

Granite Creek near Libby, Mont.

Location.- Staff gage and concrete control, la-t. 48°18', long. 115°35', in SEi sec. 5, 

T. 29 N., R. 31 W., at Glacier silver-lead mine, 2$ miles upstream from Cherry Creek 

and 7 miles southwest of Libby.

Drainage area.- 23.6 square miles.

Records available.- January to December 1933, August 1936 to September 1941.

Extremes.- Maximum discharge observed during year, 430 second-feet May 17 (gage height, 

3.be feet); minimum observed, 6.8 second-feet Aug. 22, 23 (gage height, 1.90 feet). 

1933, 1936-41: Maximum discharge observed, 1,960 second-feet Apr. 18, 1938; no 

flow Jan. 4, 1933 (creek blocked by snow slide).

Remarks.- Records good except those for periods of ice effect, which are fair. Some 

fluctuation at low flow caused by concentrating mill. Gage read once daily.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

15

14

15

16

17

18

19

20

21

22

23

24

26

26

27

28

29

30

SI

Oct.

8.7

8.4

9.3

9.9

11

9.9

9.9

9.3

8.1

7.5

8.7

14

14

13

13

11

10

9.9

9.3

8.7

9.3

11

11

9.9

22

26

23

21

18

21

23

Nov.

19

17

15

15

14

13

15

18

19

14

13

12

8.4

9.0

9.6

9.6

9.6

10

9.0

9.0

9.6

9.0

9.0

9.6

9.0

8.4

7.8

9.0

9.6

9.6

-

Dec.

9.0

9.0

9.6

10

10

14

14

IS

IS

«11

9.6

7.2

b7

7.2

b7

b7

7.2

7.2

7.2

7.2

7.2

10

15

16

14

15

14

10

13

12

12

Jan.

12

9.6

9.0

b9

b9

9.3

10

9.9

9.3

9.3

9.S

8.7

8.7

8.7

9.3

9.9

10

10

11

10

9.9

9.9

9.3

9.9

9.9

10

10

«10

9.9

9.9

9.S

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

8.7

9.3

9.9

9.3

7.5

7.5

8.7

9.3

9.9

9.9

10

9.9

8.7

8.1

S.I

7.5

7.5

8.1

8.7

8.4

8.1

8.7

8.7

8.1

7.5

7.5

S.I

9.3

_

-

Secondfoot-days

398.8

348.8

324.6

17, 757. 5

300.0

241.0

2,586

4 9S3

3^331

971

333.0

1,307

15,949.2

Mar.

14

27

25

22

22

20

22

26

23

26

26

25

22

20

IS

18

IS

28

31

28

28

27

26

25

26

26

34

32

38

48

54

Maximum

26

19

16

408

12

10

54

152

430

279

61

18

124

430

Apr.

69

78

78

78

72

66

64

63

63

75

76

85

86

85

92

89

75

64

60

54

60

81

89

113

113

117

117

132

139

152

-

Hay

191

236

179

152

132

104

81

75

66

66

78

179

209

209

146

182

4SO

318

203

148

122

132

132

152

168

173

126

117

113

132

29S

Minimum

7.8

7.8

7

5 2

8

n

 f 

7. &

14

54

66

50

15

6*8

14

6.8

June

279

229

173

142

157

146

136

136

142

113

113

109

113

132

113

89

78

72

85

92

72

78

75

75

72

57

52

50

85

66

-

Mean

12.9

11.6

10.5

48.5

9.68

8.61

26 . 6

86.2

161

111

31.3

10.7

43.6

43.7

July

61

56

53

51

51

49

46

44

38

35

35

32

28

28

28

28

27

32

28

26

23

20

19

18

17

17

18

17

17

13

16

Per

square 

Bile

0.547

JQO 

 V9&

.445

2 06o

.410

.365

1.13

S DOee 

6* 82

4.70

1.33

.453

1.85

1.85

Aug.

16

11

12

UI

14

S

£

i

£

.4

.4

.4

.7

S.7

8.7

E

£

;

J.7

.0

.4

9.4

11i

(

(

).4

5.1

S.I

7.4

7.4

S

3.8

3.8

>.4

8.1

8.7

1

1!

1

1

7

3

3

I

15

Sept.

14

16

20

24

27

23

26

22

20

20

37

46

51

124

115

70

61

70

73

61

51

44

38

44

35

36

40

35

33

32

~

Runoff

Inches

0.63

.55

.51

27 * 99

.47

 «Qoo

1.30

4.07

7.86

5*24

l'.5Z

.52

2.06

25.12

Ac re- feet

791

692

644

35,220

(COC DVD

478

1,640

5,130

9,880

6,610

1,930

660

2,590

31,640

* Winter discharge measurement Bade on this day. 

b Stage-discharge relation affected by ice.
102 KOOTENAI RIVER BASIN 

Boulder Creek hear Leonla, Idaho

Location.- Water-stage recorder, lat. 48°36', long. 116°06', In JJWi sec. 32, T. 61 N., 

R. 3 E., half a mile downstream from McGlnty Creek, 1 mile upstream from buildings of 

the Idamount Lead-Zinc Mines Co., 3 miles upstream from mouth, and 3 miles southwest 

of Leonla.

Drainage area.- 53 square miles.

Records available.- November 1928 to September 1941. April to November 1928 at site li 

miles downstream.

Average discharge.- 12 years (1929-41), 103 second-feet.

Extremes.- Maximum discharge during year, 1,200 second-feet May 17 (gage height, 4.05 

reet); minimum, 6 eecond-feet Dec. 11, 12 (gage height, 0.27 foot).

1928-41: Maximum discharge, 2,050 second-feet Apr. 18, 1938 (gage height, 5.50 

feet), from rating curve extended above 1,800 second-feet; minimum, 2 second-feet 

Aug. 25 and Sept. 5, 1931. .

Remarks.- Records good. No diversion or regulation.

Rating tables, water year 1940-41, except periods of Ice effect (gage height, In feet, and

discharge, In second-feet) 

(Shifting-control method used Feb. 26 to Bay 17)

Oct. 1 to Bay 17

.9 

1.2

6.3

16.5

32

59

1.5 

1.8 

2.1 

2.4

105

175

270

385

Hay 17 to Sept. 30

1.1

1.4 

1.7

5.9

16.7

38.0

72

127

2.0 

2.3 

2.7 

3.1 

3.5

205

310

485

Discharge, In second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

Z7

28

29

30

31

Oct.

7

8

9

12

12

10

9

9

9

10

12

12

12

11

10

10

 9

9

9

9

11

13

11

12

31

21

22

IS

16

25

30

Nov.

23

19

17

16

14

14

15

20

18

15

12

10

11

12

13

12

13

13

12

12

12

11

12

11

12

11

12

12

13

13

-

Dec.

12

*12

16

16

26

29

21

19

17

13

7

S

10

10

11

11

11

13

16

22

41

43

36

31

30

28

26

24

23

23

20

Jan.

b!3

b!2

b!2

b!4

b!6

b!7

b!6

16

16

16

16

16

16

*16

16

16

16

18

20

18

17

16

16

16

18

19

17

16

D15

b!5

17

Month

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

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

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

Calendar year 1940 .........

Janusry .......................

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

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

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

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

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

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

August ...'.....................

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

Water year 1940-41 ..........

Feb.

16

17

16

b!4

b!3

b!5

17

16

16

16

16

16

16

*15

b!4

b!4

b!3

b!3

b!4

16

15

15

b!3

15

15

15

15

43

-

-

-

Secondfoot-days

408

410

625

24,848

498

449

2,257

5,714

7,718

2,275

747

354

1,065

22,520

Mar.

91

101

76

64

57

54

54

62

62

57

55

50

45

45

44

44

49

87

76

71

69

*67

63

64

72

82

86

9S

109

138

165

Maximum

31

23

43

695

20

43

165

263

928

143

51

24

72

928

Apr.

178

161

162

158

148

142

142

152

165

172

184

214

226

214

223

184

162

148

145

152

178

205

211

220

232

232

229

246

246

263

-

May

309

302

309

235

246

190

162

158

145

140

155

223

223

28S

214

292

928

555

377

295

265

234

215

199

185

166

145

145

134

129

155

Minimum

7

10

7

4

12

13

44

142

129

47

11

8

16

7

June

143

121

119

110

101

93

86

86

36

77

69

63

59

55

55

52

6.0

71

93

90

72

63

56

49

58

54

47

58

71

58

-

Mean

13.2

13.7

20.2

67.9

16.1

16.0

72. S

190

249

75.8

24.1

11.4

35.5

61.7

July

51

46

43

44

40

36

34

31

29

27

27

26

24

22

21

20

20

22

20

17

16

14

14

14

15

13

12

13

13

12

11

Per 

square 

mile

0.249

.258

.381

1.28

.304

.302

1.37

3.58

4.70

1.43

.455

.215

.670

1.16

Aug.

11

11

11

12

11

11

10

10

9

9

9

10

11

11

11

10

9

9

8

8

9

9

11

13

11

12

24

20

16

13

15

Sept.

16

17

19

26

19

18

21

16

16

22

35

28

23

54

56

43

35

64

72

72

59

49

43

39

35

33

31

30

29

36

Runoff

Inches

0.29

.29

.44

17.44

.35

.31

1.58

3.99

5.42

1.60

.52

.25

.75

15.79

Acre-fest

809

813

1,240

49,280

986

891

4,480

11,330

15,310

4,510

1,480

702

2,110

44,660

* Winter discharge measurement made on this day. 

b Stage-discharge relation affected by Ice.
KOOTENAI RIVER BASIN 103 

Moyie River at Eastport, Idaho 

(International Gaging Station)

Location.- Water-stage recorder, lat. 49°00', long. 116°11', in SEi sec. 10, T 65 N., 

RT~2"~E., at Eastport, 1,000 feet downstream from international boundary.

Drainage area.- 570 square miles.

Records available.- August 1929 to September 1941 In reports of u. S. 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, Department of Mines 

and Resources, Canada.

Average discharge.- 12 years, 586 second-feet.

Extremes.- Maximum discharge during year, 2,560 second-feet May 17 (gage height, 6.72 

reet); minimum, 54 second-feet Oct. 1 (gage height, 3.45 feet).

1929-41: Maximum discharge, 6,240 second-feet Apr. 28, 1934 (gage height, 9.46 

feet), from rating curve extended above 5,500 second-feet; minimum, 23 second-feet 

Nov. 7, 1936 (gage height, 3.20 feet).

Remarks.- Records excellent except those for periods of ice effect, which are fair. No 

regulation or diversion above station.

Cooperation.- This station is one of the international gaging stations maintained by the 

United states under agreement with Canada.

Rating table, water year 1940-41, except periods of Ice effect (gage height, In feet, and 

discharge. In second-feet)

3.4 44 4.3 330 5.2 919 6.1 1,S30 

3.7 112 4.6 489 5.5 1,200 6.4 2,180 

4.0 205 4.9 684 5.8 1,500

Discharge, in second-feet, water yesr October 1940 tc September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 18- 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

57 

57 

57 

59 

59

59 

57 

57 

57 

57

65 

79 

79 

84 

86

89 

89 

91 

91 

91

102 

109 

104 

107 

123

129 

134 

140 

143 

149 

162

Nov.

155 

162 

159 

152 

149

*149 

152 

159 

159 

149

b!30 

bllO 

bllO 

bl!5 

bllS

b!20 

b!30 

b!30 

b!25 

129

123 

b!05 

120 

115 

109

107 

b!08 

109 

107 

107

Dec.

102 

102 

102 

107 

115

129 

126 

123 

120 

blOO

t>80 

»b65 

b60 

b70 

b70

b75 

b75 

b80 

b90 

blOO

b!30 

b!60 

b!55 

b!45 

b!50

149 

137 

137 

134 

134 

b!20

Jan.

blOO 

b80 

b80 

b90 

b95

blOO 

blOS 

blOO 

blOO 

blOO

b95 

b90 

b95 

blOO 

blOO

*blOO 

blOO 

112 

118 

bllO

b95 

blOO 

112 

blOO 

blOO

118 

109 

blOO 

*b90 

b98 

b90

Feb.

107 

112 

109 

blOS 

b95

blOO 

b!05 

109 

107 

107

104 

104 

102 

b98 

b95

b95 

b90 

b85 

b90 

 102

b98 

b9S 

b95 

b95 

104

102 

102 

126

 +h SeccndMonth foot-days

Ooto 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

mber ......................

2,S22 

3,873 

3,442

lendar year 1940 ......... 160,149

ary

ember .....................

3,079 

2,841 

12,757 

37,018 

43,030 

13,106 

6,475 

2,581 

8,201

ter year 1940-41 .......... 144,225

Mar.

171 

251 

294 

290 

290

285 

281 

321 

330 

321

303 

294 

277 

272 

264

264 

285 

455 

495 

473

466 

449 

427 

427 

455

520 

563 

622 

706 

836 

1,060

Maximum

162 

162 

155

3,010

118 

126 

1,060 

1,5-60 

2,210 

1,100 

359 

107 

473

2,210

Apr.

1,190 

1,210 

1,190 

1,190 

1,140

1,100 

1,060 

1,080 

1,160 

1,240

1,280 

1,350 

1,450 

1,400 

1,400

1,300 

1,220 

1,120 

1,040 

99S

1,030 

1,120 

1,190 

1,240 

1,260

1,300 

1,350 

1,400 

1,450 

1,560

May

1,720 

1,780 

1,720 

1,610 

1,610

1,500 

1,350 

1,250 

1,150 

1,060

1,040 

1,190 

1,270 

1,300 

1,260

1,260 

2,210 

2,130 

1,830 

1,660

1,500 

1,400 

1,300 

1,260 

1,210

1,140 

1,030 

1,050 

1,070 

1,060 

1,060

June

1,100 

1,030 

9S1 

954 

963

894 

82S 

774 

736 

684

636 

539 

550 

513 

495

466 

443 

43S 

473 

53S

495 

455 

421 

395 

379

379 

354 

374 

395 

369

July

359 

350 

335 

335 

326

303 

290 

285 

264 

247

235 

228 

220 

209 

202

191 

185 

174 

163 

159

152 

146 

140 

134 

132

126 

120 

118 

118 

115 

109

Per 

Minimum Mean square 

 mile

57 91.0 0.160 

107 129 .226 

60 111 .195

45 438 .763

80 99.3 .174 

85 101 .177 

171 412 .723 

998 1,234 2.16 

1,030 1,388 2.44 

354 604 1.06 

109 209 .367 

68 83.3 .146 

39 273 .479

57 395 . 693

Aug.

107 

102 

102 

99 

96

91 

89 

84 

81 

79

77 

77 

84 

84 

31

84 

81 

77 

74 

72

63 

68 

68 

70 

68

70 

S6 

99 

91 

36 

S6

Sept.

89 

39 

91 

94 

94

96 

102 

102 

104 

113

156 

152 

174 

290 

374

345 

345 

374 

433 

476

472 

460 

449 

427 

411

395 

390 

374 

359 

359

Runoff

Inches Ac re- feet

0.13 5,600 

.25 7,630 

.22 6,830

10.45 317,600

.20 6,110 

.13 5,640 

.83 25,300 

2.41 73,420 

2.31 85,350 

1.18 35,910 

.42 12,840 

.17 5,120 

.53 16,270

9.33 236,100

* Winter discharge measurement made on this day. 

b Stage-discharge relation affected by Ice.
104 KOOTENAI RIVER BASIN 

Moyie River at Eileen, Idaho

Location.- Water-stage recorder, lat. 48°46', long. 116°10', in NEi sec. 35, T. 63 N., 

R. 2 E., an eighth of a mile downstream from Skin Creek, a quarter of a mile southeast of Eileen, and 4 miles upstream from mouth.

Drainage area.- 755 square miles.

Records available.- October 1925 to September 1941.

Average discharge.- 16 years, 751 second-feet.

Extremes.- Maximum discharge during year, 3,290 second-feet May 17 (gage height, 3.24 

reetj; minimum daily, 85 second-feet Dec. 13.

1925-41: Maximum discharge, 8,780 second-feet Apr. 29, 1934, from rating curve 

extended above 6,500 second-feet; maximum gage height, 4.8 feet May 17, June 10, 11, 

1927, May 13, 17-19, 1928; minimum discharge, 40 second-feet Nov. 27, 1936; minimum 

gage height, -0.40 foot Sept. 4, 1940.

Remarks.- Records excellent except those for periods of ice effect, which are fair. No 

diversion or regulation above station.

Rating table, water year 1940-41, except periods of ioe effect (gage height, in feet, and

discharge, in second-feet) 

(Shifting-control method used July 6 to Sept. 14)

3.3 84

3 135

.3 204

.6 291

0.9 403

1'. 2 551

1.5 748

1.8 1,020

2.1 1,370

2.4 1,780

2.7 2,250

3.0 2,790

Discharge, in second-feet, water year October 1940 to September 1941

Daj

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

16

19

20

21

22

23

24

25

26

27

26

,29

30

31

Oct.

88

90

90

96

93

92

90

88

87

88

99

104

111

111

113

lie

116

118

120

120

126

135

135

137

152

165

168

172

177

192

204

Nov.

202

196

196

192

184

»179

186

199

202

189

177

b!40

b!35

6140

b!40

b!45

163

163

156

170

148

127

146

139

135

133

135

139

139

135

-

Dec.

133

131

133

137

156

177

170

170

163

141

bllO

»b90

b85

b90

b95

blOO

blOO

bllO

b!20

b!50

b200

b250

231

209

209

207

194

186

179

177

172

Jan.

b!30

bllO

blgO

b!25

b!30

b!40

b!40

b!35

b!35

b!30

b!30

135

143

148

146

»146

146

152

161

156

137

143

156

148

141

174

163

154

137

141

154

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

Hay

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

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

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

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

Water year 1940-41 ..........

Fab.

154

150

150

143

133

143

152

156

148

148

150

150

150

146

135

b!30

b!25

b!20

b!35

»152

141

141

135

133

150

141

139

177

-

-

-

Secondfoot-days

3,793

4,830

4,775

197,499

4,406

4,027

17,920

44,990

53,530

23,660

8,743

3,768

10,610

185,052

Mar.

263

421

497

472

458

448

439

487

519

497

472

453

416

403

399

387

408

592

697

682

656

636

604

592

623

697

741

797

884

1,010

1,270

Maximum

204

202

250

3,470

174

177

1,270

1.S80

2,910

1,380

497

146

604

2,910

Apr.

1,420

1,490

1,450

1,460

1,400

1,360

1,310

1,320

1,380

1,470

1,530

1,640

1,720

1,680

1,710

1,610

1,490

1,380

1,290

1,240

1,250

1,350

1,440

1,500

1,540

1,580

1,630

1,700

1,770

1,880

-

May

2,040

2,170

2,090

1,960

1,930

1,810

1,640

1,530

1,410

1,310

1,270

1,410

1,540

1,610

1,570

1,530

2,600

2,910

2,460

2,150

1,950

1,800

1,670

1,580

1,530

1,440

1,310

1,320

1,350

1,320

1,320

Minimum

87

127

85

72

110

120

263

1,240

1,270

487

150

104

127

85

June

1,380

1,300

1,230

1,190

1,190

1,120

1,040

990

950

S84

839

789

733

690

656

630

604

604

642

704

682

623

580

540

519

513

487

497

535

519

Mean

122

161

154

540

142

144

578

1,500

1,727

789

282

122

354

507

July

487

477

458

448

434

412

391

382

355

336

318

305

291

285

269

257

246

234

223

215

204

194

186

182

182

174

165

161

156

156

150

Per 

square 

mile

0.162

.213

.204

.715

.188

.191

.766

1.99

2.29

1.05

.374

.162

.469

.672

Aug.

146

143

141

141

137

131

127

124

122

118

113

113

118

122

120

118

118

113

109

108

104

104

106

108

104

106

127

141

135

127

124

Sept.

127

129

137

137

139

137

143

143

15S

168

204

226

240

325

482

448

439

46$

540

592

604

592

575

551

529

508

492

477

458

455

"

Runoff

Inches Acre-feet

0.19 7,520

.24 9,580

.24 9,470

9.73 391,700

.22 8,740

.20 7,990

.88 35,540

2.22 89,240

2.64 106,200

1.17 46,930

.43 17,340

.19 7,470

.52 21,040

9.14 367,100

* Winter discharge measurement made on this day 

b Stage-discharge relation affected by ice.
KOOTENA.I RIVER BASIN 105

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 downstream from Ruby Creek, and 1 mile southwest of i 

Moravia.

Drainage area.- 133 square miles.

Records available.- May 1928 to September 1941 (no winter records prior to 1933).

Extremes .- Maximum discharge observed during year, 558 second-feet May 17 (gage height, 

2.72 feet); minimum observed, 9 second-feet Aug. 21 (gage height, 0.08 foot).

1928-41: Maximum discharge observed, 1,300 second- feet Dec. 22, 1933; maximum 

gage height, 4.20 feet Dec. 22, 1933, Apr. 18, 1938; minimum discharge observed, 5 

second-feet Aug. 14, 22, 1940; minimum gage height observed, 0.00 foot Aug. 22, 1940.

Remarks.- Records fair except those for periods of Ice effect which are poor. 

read once dally. Small diversion above station for Irrigation.

Staff gage

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

13 

13 

14 

16 

17

16 

16 

17 

17 

18

19 

17 

17 

17 

17

16 

16 

17 

18 

19

20 

19 

19 

20 

22

28 

28 

30 

41 

43 

*49

Nov.

41 

38 

34 

30 

22

27 

28 

28 

41 

b30

t)25 tie

t)18 

b!9 

fc20

t)21 

b22 

24 

33 

28

27 

28 

25 

24 

25

27 

27 

29 

32 

34

Dec.

33 

32 

35 

36 

45

40 

*40 

37 

34 

t)30

t)21 

t)15 

t)13 

t)13 

b!4

t)15 

b!6 

fc20 

fc30 

fc45

99 

78 

80 

77 

68

61 

54 

50 

46 

42 

41

Month

Octc 

Hove 

Dece

Ca

Janu 

Pebi 

Marc 

Apri 

Bay 

June 

July 

Augu 

Sept

Wa

Jan.

lendar year 194 

ary

ember .....................

ter year 1940-41 ..........

fcSO 

t)S5 

b25 

t>28 

bSO

TaSZ 

t)35 

b35 

fc32 

fcSO

WO 

fc32 

t)34 

35 

36

35 

38 

51 

62 

*53

41 

40 

40 

37 

49

43 

53 

51 

49 

45 

45

Feb.

45 

43 

t>41 

t)38 

t)35

t)37 

t)40 

43 

47 

43

49 

51 

53 

53 

b51

b49 

b47 

b45 

»62 

40

40 

41 

40 

40 

39

39 

39

70

Secondfoot-days

649 

825 

1,260

31,659

1,201 

1,260 

4,914 

5,596 

6,636 

3,089 

1,063 

513 

1,231

23,237

~Har. 1

150 

201 

196 

230 

201

196 

183 

171 

165 

139

127 

123 

119 

115 

108

101 

131 

160 

15S 

160

152 

14S 

139 

131 

135

156 

156 

165 

169 

201 

228

Maximum

49 

41 

99

550

62 

70 

230 

230 

558 

192 

71 

43 

60

558

Apr.

230 

211 

206 

206 

201

196 

190 

196 

206 

196

201 

206 

201 

196 

194

174 

165 

165 

160 

165

163 

160 

167 

165 

165

169 

169 

185 

192 

196

May

Minimum

13 

18

13

5

25 

35 

101 

160 

154 

62 

17 

9 

21

9

235 

225 

211 

211 

215

196 

17S 

160 

165 

160

165 

169 

178 

174 

169

201 

558 

402 

320 

266

260 

206 

206 

192 

187

171 

156 

156 

160 

154 

230

June

192 

165 

169 

146 

139

141 

137 

129 

135 

129

102 

92 

74 

77 

86

87 

87 

91 

94 

84

81 

73 

75 

62 

78

74 

77 

71 

68 

74

Mean

20.9 

27.5 

40.6

86.5-

38.7 

45.0 

159 

187 

214 

103 

34.3 

16,5 

41.0

77.4

July

71 

63 

61 

56 

50

47 

45 

45 

43 

40

36 

33 

33 

33 

33

32 

30 

32 

29 

26

26 

24 

23 

24 

20

20 

17 

17 

20 

17 

17

Per 

square 

mile

0.157 

.207 

.305

.650

.291 

.338 

1.20 

1.41 

1.61 

.774 

.258 

.124 

.303

.532

Aug.

17 

16 

16 

18

16

16 

15 

14 

14 

13

12 

14 

16 

15 

14

15 

13 

12 

12 

13

9 

11 

13 

17 

14

15 

43 

28 

25 

22 

25

Sept.

21 

25 

30 

25 

27

27 

31 

27 

49 

53

56 

50 

49 

49 

49

43 

40 

49 

53

60

55 

43 

45 

55 

43

38 

36 

33 

34 

36

Runoff

Inches Acre-feet

0.18 1,290 

.23 1,640 

.35 2,500

8.85 62,800

.34 2,330 

.35 2 , 500 

1.38 9,750 

1.57 11,100 

1.86 13,160 

.86 6,130 

.30 2,110 

.14 1,020 

.34 2,440

7.90 56,020

* Winter discharge measurement made on this day. 

ID Stage-discharge relation affected by ice.
106 KOOTENAI RIVER BASIN

Long Canyon Creek near Port Hill, Idaho

Location.- Water-stage recorder, lat. 48°57', long. 116°32', in NWi sec. 36, T. 65 N., 

R. 2 W., at ]}. S. Forest Service bridge at mouth of canyon, 4 miles southwest of Port 

Hill. Prior' to Sept. 4, 1941, at datum 2.00 feet higher.

Drainage area.- 29 square miles.

Records available.- May 1928 to September 1941 (no winter records prior to 1935).

Extremes.- Maximum discharge during year, 580 second-feet May 17 (gage height, 5.90 feet, 

present datum); minimum daily, 3 second-feet Dec. 13 (estimated); minimum recorded 

gage height, 1.72 feet, present datum, Aug. 12.

1928-41: Maximum daily discharge, 950 second-feet (estimated) June 15, 1933; 

maximum gage height, 8.55 feet, present datum, (drift Jam) June 14, 15, 1933; minimum 

discharge, 3 second-feet Nov. 1-3, 28, Dec. 4-10, 1936, Jan. 6-8, 1937, Dec. 13, 1940; 

minimum gage height, that of Aug. 12, 1941.

Remarks.- Records good except those for Nov. 12 to Feb. 27 and May 17 to Sept. 4 which are 

poor. No diversions above gage.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

16

17

18

19

20

21

22

23

24

26

26

27

28

29

30

31

Oct.

6

6

6

6

6

6

6

6

6

6

10

8

8

7

7

6

6

6

7

6

10

9

8

9

17

13

13

11

10

11

11

Nov.

10

9

9

8

7

S

8

9

S

7

5

b4

4

5

5

6

6

7

8

8

8

7

7

7

7

7

7

7

7

7

Dec.

7

7

9

10

12

13

13

12

11

10

7

5

3

4

4

5

6

7

S

9

10

12

14

12

11

11

10

b9

9

8

7

Jan.

6

6

5

5

6

6

7

7

7

6

6

7

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

8

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

July .................... v .....

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

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

Water year 1940-41 ..........

Feb.

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

10

11

_

_

-

Secondfoot-days

253 iy\ f> t£J.i£

275

15,239

225

255

608

2,337

5,664

2,564

967

388

1,170

14,918

Mar.

17

24

24

20

17

17

17

17

18

17

17

16

15

16

15

15

15

21

22

21

20

19

18

18

18

19

20

21

25

31

40

Maximum

1"

1C

14

31E

E i:

4C i i. TP {*. 42r

211

5£

2]

72

42r

Apr.

43

44

44

43

42

41

40

40

43

46

52

65

72

76

84

79

72

68

65

65

76

89

99

108

115

123

131

141

156

175

-

May

204

202

188

16S

154

131

115

10S

99

106

106

160

177

179

160

179

427

290

237

227

214

198

191

201

198

186

152

146

155

169

237

Minimum

6

4

3

5

5

9

15

40

99

50

15

10

13

3

June

211

171

157

146

132

121

110

114

100

84

80

75

67

62

56

50

62

55

60

70

65

58

54

50

56

55

50

70

75

60

-

Mean

8»2

7.1

8.9

41.6

7.3

9.1

19.6

77.9

183

85.5

31.2

12.5

39.0

40.9

July

55

52

48

50

61

50

47

42

39

37

36

34

34

31

29

2S

27

28

26

26

23

21

19

19

20

18

17

16

16

15

15

Per 

square 

mile

0.283

.246

.307

1.43

.252

.314

.676

2.69

6.31

2.95

1.08

.431

1.34

1.41

Aug.

14

14

14

16

14

13

13

12

12

12

11

12

012

012

012

C12

ell

ell

elO

ell

olO

elO

ell

e!2

elO

ell

o21

016

014

o!2

e!3

Sept.

CIS

e!6

e!6

c24

23

16

15

14

15

26

36

43

48

72

63

66

63

55

61

68

64

60

47

46

46

44

41

40

39

41

"

Runoff

Inches

0*33

.27

.35

19.53

.29

 33

.78

3.00

7.28

3.29

1.24

.50

1.50

19.16

Acre feet

502

420

545

30,230

446

506

1,210

4,640

11,230

5,090

1,920

770

2,320

29,600

b Stage-discharge relation affected by iee.

Note.- No recorder graph Nov. 13 to Dee. 21, Dec. 29 to Feb. 27, June 14 to July 4; discharge 

computed on basis of occasional staff gage readings, records for nearby stations, and weather records. 

Backwater from construction job Aug. 13 to Sept. 4; discharge computed on basis of weather records 

and records for nearby streams.
KOOTENA.I RIVER BASIN 107

Smith Creek near Port Hill, Idaho

Location.- Water-stage recorder, lat. 480 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 1941 (no winter records prior to 1935).

Extremes.- Maximum discharge during year, 3,150 second-feet May 17 (gage height, 7.36

 feet), fron rating curve extended above 1,600 second-feet; minimum recorded, 9 secondfeet Oct. 1; minimum gage height, 1.19 feet Aug. 21, 22.

192S-41: Maximum discharge, that of May 17, 1941; minimum, 4 second-feet Dec. 4-10, 

1936; minimum gage height, 0.78 foot Sept. 4, 1931.

Remarks.- Records good except those for periods-of ice effect or faulty or no gage-height 

record, which are poor. No diversion above gage.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

10

13

12

12

13

12

11

11

10

13

32

30

23

22

18

16

20

21

18

16

51

46

31

36

156

89

71

60

a55

a60

a60

Nov.

56

52

47

40

37

40

40

42

40

33

15

13

13

14

15

16

17

19

20

20

18

17

IS

17

16

17

17

17

17

17

-

Dec.

16

16

21

25

36

43

35

33

30

h!6

13

12

11

12

13

14

15

IS

25

36

143

195

144

53

47

45

43

40

39

3S

37

Jan.

36

30

20

20

32

24

27

28

28

26

25

25

27

29

30

29

28

28

29

2S

27

27

27

36

27

38

28

27

25

25

25

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

Unu Bay ...........................

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

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

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

Septembe r .....................

Water year 1940-41 ..........

Feb.

26

29

28

26

28

2S

26

27

26

25

25

24

24

23

23

23

*b23

b25

b37

b29

b27

b27

b26

b26

b26

27

26

40

_

_

-

Second 

foot-days

1 O48

760

1,262

44 ,408

S31

742

3,205

11,753

19,110

7,573

2,327

537

4,400

53,548

Mar.

73

126

134

100

83

77

76

80

80

77

73

71

64

69

6S

65

69

120

117

IDS

101

97

93

92

96

110

112

12S

146

200

300

Maximum

156

56

195

1,190

36

40

300

6S5

2,390

491

181

327

2,390

Apr.

310

320

290

280

270

260

260

270

290

310

350

420

430

420

430

380

330

310

300

330

380

430

453

470

483

523

551

594

624

6S5

May

S40

840

712

594

570

. 445

377

345

319

312

377

604

619

701

565

805

2,390

1,030

676

564

555

522

522

564

560

475

393

396

393

431

564

Minimum

10

13

11

6

20

23

64

260

312

143

24

10

IS

10

June

491

3S6

364

351

31S

395

281

2S7

284

240

321

207

1S9

169

157

143

192

274

348

321

238

198

171

154

230

198

163

273

242

198

-

Mean

33 *S

35 e 3

40.7

121

26.8

26.5

103

392

616

252

75.1

17.3

147

147

July

1S1

163

14S

141

129

118

110

102

93

87

80

SO

80

69

63

58

58

67

54

54

48

43

41

40

41

36

33

31

29

26

24

Per 

square 

mile

0.483

 361

.581

1.73

.333

.379

1.47

5.60

8.80

3.60

1.07

.247

2.10

2.10

Aug.

23

22

33

24

23

21

19

IS

16

16

14

16

18

18

16

16

14

12

12

11

10

11

13

14

13

12

31

33

24

18

16

Sept.

18

31

39

131

97

61

65

49

51

107

159

189

238

327

376

235

1S9

302

281

265

223

183

161

146

134

134

113

105

99

112

-

Runoff

Inches

0.56

.40 

.67

23.60

.44

.39

1.70

6.25

10.14

4.02

1.23

.28

2.34

2S.42

Acre-feet

1^610

2,500

38,090

1,650

1,470

6,360

23 ,310

37,900

15,020

4,620

1,070

8,730

106 ,200

* Winter discharge measurement made on this day. 

b Stage-discharge relation affected by ice. 

h Computed from staff-gage reading.

Note.- Faulty or no gage-height record Nov. 1-4, 11-30, Dec. 11-19, Jan. 2-14, Feb. 9-16, Mar. 30 

to Apr. 22; discharge computed on basis of records for nearby streams and weather records.

461678 O -42-8
108 KOOTENAI RIVER BASIN

Boundary Creek near Port Hill, Idaho 

(International gaging station)

Location.- Water-stage recorder, lat. 48°59'50n , long. 116°34'05", In SVlt sec. 11, T. 

 65 N., R. 2 W., 140 feet downstream from bridge at mouth of canyon, 0.2 nlle south of 

International boundary, and 3 miles west of Port Hill.

Drainage area.- 97 square miles.

Records available.- May 1928 to September 1941.

Average discharge.- 11 years (1930-41), 168 second-feet.

Extremes.- Maximum discharge during year, 2,300 second-feet May 17 (gage height, about 5.1 

reet, average of floodmarks), fron rating curve extended above 1.500 second-feet; 

minimum recorded, 10 second-feet Nov. 11 (gage height, 0.46 foot).

1928-41: Maximum discharge, 2,400 second-feet June 15, 1933 (gage height, 5.22 feet), 

from rating curve extended above 1,500 second-feet; minimum, 5 second-feet sometime between Nov. 10 and Dec. 3, 1936 (gage height, 0.27 foot).

Remarks.- Records good except those for periods of Ice effect or no gage-height record, 

which are poor. No diversions above gage.

Cooperation.- This station Is one of the International gaging stations maintained by the 

United States under agreement with Canada.

Rating table, water year 1940-41, except periods of ice effect (gage height, In feet, and

discharge, in second-feet) 

Oct. 1 to Dec. 20 Dec. 21 to Sept. 30

0.5 12 1.4 S8 0.6 18 1.5 109 2.4 363 

.8 29 1.7 140 .9 36 1.6 171 2.7 492 

1.1 54 2.0 210 1.2 65 2.1 256 3.0 640

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4

5

6

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26

27 

28 

29 

30 

31

Oct.

16 

26 

20 

20 

21

19 

18 

17 

16 

21

44 

30 

29 

27 

24

21 

21 

22 

24 

22

4S 

41 

30 

52

185

83 

66 

54 

50 

56 

56

Nov.

51 

46 

43 

36 

34

41 

41 

40 

39 

34

16 

1)14 

til 5 

b!7 

b!9

1)22 

1)26 

bSO 

b32 

b32

b30 

1)27 

b28 

b27 

1)27

28 

SB 

29 

29 

29

Dec.

2S 

28 

30 

35 

38

40 

36 

35 

26 

bl8

a!5 

a!3 

al2 

al2 

al4

al5 

al7 

a20 

a30 

a40

alOO 

al50 

alOO 

aSO 

a45

a43 

a42 

a41 

a40 

a39 

a38

Jan.

a32 

a25 

a22 

a23 

a26

a28 

a30 

a30 

a28 

a27

a27 

a28 

a29 

«30 

30

30 

30 

30 

31 

30

28 

28 

30 

30 

30

30 

30 

30 

27 

27 

30

Feb.

30 

30 

30 

28 

27

b28 

b30 

32 

30 

30

30 

30 

30 

25 

b25

b25 

b24 

b25 

b27 

32

30 

29 

28 

28 

28

28 

28 

37

Month SecondMonth foot-days

Ooto 

Neve 

Decs

Ca

Jann 

Fabr 

Marc 

Apr! 

Hay 

June 

July 

Augn 

Sept

Wa

 ber ...................

lendar year 1940 ......

ary

1,179 

910 

1,192

45,501

h .........................

1 .........................

st ........................

ember .....................

886 

804 

3,065 

10,903 

18,111 

6,440 

2,256 

S71 

3,121

ter year 1940-41 .......... 49,738

Mar.

52 

81 

122 

92 

77

72 

69 

74 

72 

68

68 

66 

57 

64 

70

65 

70 

117 

117 

106

100 

95 

92 

92 

99

115 

US 

134 

156 

205 

280

Maximum

185 

51 

150

1,060

32 

37 

280 

668 

1,500 

420 

147 

43 

184

1,500

Apr.

297 

300 

263 

253 

247

247 

240 

247 

270 

294

333 

394 

406 

386 

394

344 

304 

280 

273 

287

333 

386 

415 

437 

460

483 

516 

561 

585 

668

May

640 

870 

750 

668 

605

502 

428 

394 

363 

355

424 

640 

640 

695 

590

840 

al,500 

a800 

a 600 

aSSO

a520 

aSOO 

aSOO 

aS40 

aS40

a450 

a380 

a380 

a3SO 

398 

469

Minimum

16

14 

12

11

22 

24 

52 

240 

355 

136 

32 

21 

34

12

June

420 

352 

340 

325 

290

263 

247 

240 

244 

211

189 

174 

160 

147 

143

141 

156 

212 

297 

263

203 

169 

151 

136 

158

160 

136 

176 

181 

156

Mean

38.0 

30.3 

38.5

124

28.6 

28.7 

98.9 

363 

584 

215 

72.8 

28.1 

104

136

July

147 

136 

124 

141 

122

111 

104 

106 

92 

S5

81 

78 

75 

68 

63

58 

54 

57 

52 

57

48 

43 

42 

42 

50

42 

38 

38 

36 

34 

32

Per 

square 

mile

0.392 

.312 

.397

1.2S

.295 

.296 

1.02 

3.74 

6.02 

2.22 

.751 

.290 

1.07

1.40

5.4 870

Aug.

30 

30 

30 

35 

31

29 

28 

26 

25 

25

24 

25 

2S 

27 

27

27 

24 

23 

22 '22

21 

24 

25 

25 

23

25 

42 43' 

41 

31 

33

Sept.

34 

34 

42 

S9 

73

52 

60 

45 

50 

132

164 

124 

132 

174 

167

147 

128 

136 

184 

171

151 

130 

115 

102 

94

86 

79 

74 

72 

79

Runoff

Inches

0.45 

.35 

.46

17.45

.34 

.31 

1.18 

4.17 

6.94 

2.48 

.87 

.33 

1.19

19.07

Acre-feet

2,340 

1,800 

2,360

90,220

1,760 

1,590 

6,080 

21,630 

35,920 

12,770 

4,470 

1,730 

6,190

98,640

* Winter discharge Measurement made on this day. 

b Stage-discharge relation affected by lea. 

Hote.- Ho gage-height record Dec. 11 to Jan. 14, May 17-29; discharge computed on basis of records 

for nearby streams and weather records.
PEND OREILLE RIVER BASIN

Clark Fork above Mtssoula, Mont.

109

Location.- Water-stage recorder, lat. 46°53', long. 113°56', In NWi sec. 19, T. 13 N., 

R. ib W., s miles downstream from Blackfoot River and 3 miles east of Mlssoula.

Drainage area.- 5,740 square miles.

Records available.- March 1929 to September 1941. 

Average discharge.- 12 years, 2,146 second-feet.

Extremes.- Maximum discharge during year, 5,400 second-feet June 6 (gage height, 4.89 

reet); minimum, 300 second-feet July 28 (gage height, 1.21 feet).

1929-41t 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 Jan above 

gage); minimum dally, 224 second-feet Jan. 8, 1930 (ice Jam above gage).

Remarks.- Recprds good except those for periods of ice effect, which are fair. Regulatlon from power plant at Bonner. Several diversions above station for Irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Daj

1

2

3

4

5

8

7

8

9

10

11

12

13

14

16

16

17

18

19

20

21

22

23

24

25

26

27

28 

29

30

31

Oct.

1,450

1,360

1,360

1,130

1,220

1,150

1,140

1,140

1,190

1,030

1,1SO

1,180

1.170

1.040

1,070

1,160

1,150

1,140

1,120

1,130

1,120

1,130

1,250

1,190

1,200

1,280

1,250

1,180 

1,180

1,170

1,010

No

990

11150 ijieo

U170

l}l90

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

ISO

170

190

190

,130

,060

924

834

7SO

,090

,200

699

,120

,200

030

870

090

,000

,000

170

.150

aoo

lll40 

1L380

ilsso

October. ........

November. .......

December. .......

Calendar year

January .........

February ........

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

April ..........

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

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

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

August

-

Dec.

1,300

1,290

1,290

 1,220

1,380

1,740

1,860

852

1,020

1,180

1,090

942

879

b780

b700

b660

b700

798

1,060

1,100

1,240

1,180

1,270

1,170

1,190

1,160

1,130

1,170 

1,080

bl,020

b940

Jan.

b920

1)660

bSOO

b760

1>850

b940

bl,000

bl,060

bl,000

b950

b920

b920

t-960

1)1,020

1,080

1,130

1,080

1,090

1,100

*1,120

1,100

1,070

1,040

1,000

990

1,030

980

970 

951

834

S16

Feb.

861

906

961

933

897

879

886

933

933

970

990

1,010

980

933

843

798

843

916

924

942

951

961

942

970

961

924

924

933

_

-

Month

L940 ......................

September . ..... .1 ...........................

Water year 194b-41 ......................

liar.

1,080

1,610

1,600

1,380

1,360

1,390

1,320

1,320

1,410

1,470

1,330

1,160

1,020

1,030

942

1,050

980

1,080

1,280

1,100

1,090

1,030

1,080

1,080

1,060

1,080

1,060

1,070 

1,080

1,060

1,200

Apr.

1,170

1,150

1,130

1,180

1,130

1,190

1,140

1,100

1,130

1,070

1,050

1,160

1,260

1,210

1,190

1,140

1,170

1,170

1,200

1,160

1,170

1,190

1,170

1,1*0

1,190

1,330

1,300

1,330 

1,'450

1,360

-

Secondfoot-days

36,580

32,637

33,791

617,185

30,321

26^8*75

36,732

35,730

63*1*70

90,550

44,416

27,555

34,371

490,668

May

1,560

1,610

1,780

1,980

1,980

2,040

2,040

1,780

1,840

1,640

1,640

1,410

1,910

2,360

2,720

2,500

2,360

2,360

2,290

2,220

1,898

1,890

1,890

1,770

1,770

1,830

2,020

2,360 

2,360

2,220

2,280

Maxiaua

1,460

1,380

1,740

5,910

1,130

1,010

1,610

1,460

2,720

5,060

2,220

1,510

1,420

5,060

June

2,720

4,310

4,020

4,110

4,410

5,060

4,720

4,510

4,210

3,920

3,640

3,280

2,950

2,800

2,800

2,570

2,500

2,490

2,430

2,720

2,640

2,430

2,220

2,020

1,830

1,710

1,610

1,710 

2,160

2,220

~

MiniBum

1,010

695

660

6SC

760

79E

94!

1,060

1,410

1,510

626

708

533

533

July

2,280

2,080

2,020

1,960

1,890

1,830

1,830

1,770

1,830

1,770

1,710

1,710

1,350

1,590

1,390

1,340

1,240

1,080

1,160

1,070

1,120

1,060

960

970

970

990

1,480

626

1,010

1,220

1,200

Aug.

1,180

1,160

1,070

1,060

1,030

990

930

930

870

870

852

798

878

834

870

843

798

789

736

771

736

708

726

768

763

780

780

798 

900

861

1,510

Mean

1,178

1,088

1,090

1,686

978

924

1,1S5

1,191

2,005

3,018

1,433

889

1,146

1,344

Sept.

688

ess

900

940

870

960

980

1,040

1,870

1,080

1,080

1,170

1,100

1,870

1,810

i,s«o

1,200

1,8*0

1,190

1,260

1,360

1,480

1,910

1,570

1,300

1,310

1,280

1,890 

1,310

1,330

Runoff in 

acre-feet

72,440

64,750

67,020

1,224,000

60,140

51,380

78,840

70,870

123,900

179,600

88,100

54,660

68,170

973,200

b Stage-dischaWe relation affected by ice.
110 PEND OREILLE RIVER BASIN

Clark Fork below Mlssoula, Mont.

Location.- Water-stage recorder, lat. 46°52, long. 114°07', In SEi sec. 21, T. 13 N., 

RT~SD~W., 2 miles downstream from Bltterroot River and 6 miles west of Mlssoula.

Drainage area.- S,690 square miles.

Records available.- October 1929 to September 1941.

Average discharge.- 12 years, 3,969 second-feet.

Extremes.- Maximum discharge during year, 10,400 second-feet June 2 (gage height, 4.61 

feet;; minimum, 738 second-feet Dec. 16 (gage height, 0.42 foot).

1929-41: Maximum discharge, 36,800 second-feet June 11, 1933 (gage height, 10.14 

feet); minimum, 388 second-feet Jan. 18, 1933 (gage height, 0.58 foot, Ice present).

Remarks.- Records excellent except those for period of staff-gage readings, which are 

good. Slight regulation from power plant at Bonner. Many diversions above station 

for Irrigation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in aecond-feet) 

(Shifting-control method used Dec. 24-31)

Oct. 1 to Dec. 28

0.6 910 1.4 1,880

.8 1,120 1.7 2,380

1.1 1,470 2.0 2,950

Dec. 29 to Sept. 30

O.S 1,070 2.6 4,150

1.1 1,420 3.2 5,630

1.5 2,000 3.8 7,480

2.0 2,900 4.5 9,980

Discharge, in seoond-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

IS

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

3,050

2,950

2,950

2,750

2,S50

2,660

2,660

2,470

2,470

2,210

2,470

2,470

2,210

2,130

2,030

2,130

2,130

2,050

2,050

2,020

2,000

2,000

2,050

2,130

2,050

2,210

2,130

2,130

2,050

2,130

1,970

Nov.

1,920

2,030

2,130

2,050

2/210

2,050

2,030

2,130

2,020

2,020

1,950

1,770

1,640

1,500

1,760

2,210

1,610

1,940

2,130

1,920

1,800

1,950

1,670

1,510

1,860

2,000

1,950

1,940

2,210

2,300

-

Dec.

2,210

2,210

2,210

2,130

2,210

2,700

2,210

1,800

1,780

2,050

1,920

1,680

1,210

1,120

1,030

920

1,020

1,250

1,610

1,970

2,050

2,030

2,050

1,990

1,990

1,950

1,890

1.890

1,810

1,700

1,590

Jan.

1,500

1,250

1,090

1,090

1,220

1,350

1,480

1,560

1,550

1,360

1,320

1,360

1,340

1,480

1,560

1,620

1,620

1,610

1,690

1,740

1,740

1,720

1,660

1,650

1,620

1,660

1,610

1,580

1,550

1,400

1,370

Feb.

1,420

1,510

1,560

1,540

1,470

1,430

1,420

1,500

1,510

1,550

1,580

1,620

1,610

1,540

1,380

1,370

1,370

1,420

1,450

1,480

1,520

1,510

1,500

1,520

1,520

1,460

1,450

1,470

_

-

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

1,580

2,100

2,200

2,020

1,970

1,970

1,940

1.890

1,950

2,030

1,900

1,720

1,550

1,550

1,460

1,580

1,540

1,590

1,750

1,820

1,620

1,630

1,660

1,700

1,630

1,680

1,650

1,680

1,740

1,800

2,020

Apr.

2,120

2

2

2

,200

,290

,430

2,340

S.340

S

S

2

,290

,190

.150

2,120

2.140

2

2

2

,270

,340

,290

2,240

2.170

2

2

2

,220

,200

,190

2,070

2,070

2

2

2

2

,030

,070

,100

,340

2,520

2

2

3

3

Second 

foot-days

71,560

58,210

56,180

1,139,888

46,350

41,680

54,920

69,060

158,510

198,360

72,940

42,000

78,730

948,500

,520

,710

,000

,100

-

May

3,600

4,040

4,370

4,480

4,480

4,370

4,040

3,500

3,500

3,100

3,000

3,400

5,780

8,340

8,000

6,830

6,220

6,520

5,920

5,220

4,600

4,260

4,480

4,840

5,490

5,920

5,920

6,370

5,920

5,780

6,220

Maximum

3,050

2,300

2,700

13,800

1,740

1,620

2,200

3,100

8,340

9,980

4,150

2,150

3,200

9,980

June

6,990

9,980

9,060

8,700

9,240

9,980

9,610

9,240

9,980

8,880

8,000

7,320

6,680

6,220

6,070

5,630

5,220

5,090

5,350

6,520

6,680

5,7SO

5,090

4,600

4,040

3,600

3,100

3,300

4,040

4,370

-

Minimum

1,970

1,500

920

770

1,090

1,370

1,460

2,030

3,000

3,100

1,310

1,060

1,110

920

July

4,150

3,930

3,820

3,710

3,600

3,400

3,300

3,000

2,900

2,710

2,620

2,620

2,170

2,340

2,100

1,950

1,800

1,590

1,620

1,580

1,620

1,510

1,380

hi, 470

hi, 580

hi, 500

1,950

1,310

1,690

2,020

2,000

Aug.

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

2,

Mean

2,308

1,940

1,812

3,114

1,495

1,489

1,772

2,302

5,113

6,612

2,353

1,355

2,624

2,599

920

860

750

660

550

420

340

280

280

230

230

170

250

240

280

240

200

200

110

140

100

060

150

180

230

2 SO

320

320

400

460

150

Sept.

1,450

1,110

1,750

1,900

1,940

2,140

2,430

2,620

2,620

2,710

2,520

2,520

2,520

2,900

2,900

3,000

2,900

3,000

2,900

3,000

3,100

3,200

3,100

3,200

3,000

3,000

2,900

2,800

2,800

2,800

-

Runoff in 

acre-feet

141,900

115,500

111,400

2,261,000

91,930

82,670

108,900

137,000

314,400

393,400

144,700

83,310

156,200

1,881,000

h Computed from ataff gage readings.
PEND OREILLE RIVER BASIN 111

Clark Fork at St. Regis, Mont.

Location.- Water-stage recorder, lat. 47°18', long. 115°05', in sec. 19, T. 18 N., R. 

iJ7 w., at St. Regis, half a mile downstream from St. Regis River.

Drainage area.- 10,500 square miles.

Records available.- October 1910 to September 1923, February 1929 to September 1941.

Average discharge.- 25 years, 7,082 second-feet.

Extremes.- Maximum discharge during year, 12,000 second-feet June 3 (gage height, 8.82 

feet); minimum, 1,000 second-feet Dec. 17 (gage height, 3.36 feet).

1910-23, 1929-41: Maximum discharge observed, 62,800 second-feet May 30, 31, 

1913 (gage height, 19.1 feet); minimum, that of Dec. 17, 1940, but may have been less 

during period of ice effect, Feb. 19-22, 1929.

Remarks.- Records excellent except those for periods of ice effect, which are good, 

nany diversions and slight regulation above station.

Discharge, in second-feet, water year-October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

2,960

3,300

3,380

3,380

3,210

3,210

3,120

3,040

2,960

2,870

2,620

2,870

2,780

2,620

2,530

2,450

2,530

2,450

2,450

2,370

2,370

2,370

2,370

2,370

2,450

2,450

2,530

2,530

2,450

2,450

2,450

Nov.

2,370

2,300

2,450

2,530

2,450

2,450

2,370

2,370

2,450

2,370

2,370

2,230

2,110

2,000

1,940

2,140

2,510

2,140

2,360

2,510

2,360

2,210

2,360

2,140

1,940

2,210

2,360

2,360

2,510

2,750

Dec.

2,750

2,670

2,670

2,670

2,590

2,750

3,160

2,750

2,440

2,360

*2,510

2,360

2,000

bl,480

bl,340

bl,260

1,180

1,430

1,880

2,210

2,670

2,830

2,750

2,670

2,510

2,510

2,510

2,440

2,440

2,360

2,210

Jan.

2,070

1,940

bl,580

1,580

1,640

1,750

2,000

2,070

2,000

2,000

1,810

1,810

1,810

1,880

2,070

2,070

2,070

2,140

2,140

2,210

2,210

h2,140

n2,140

2,140

2,140

2,140

2,140

2,140

*2,070

2,000

1,880

Feb.

1,880

1,880

1,940

2,000

2,000

1,940

1,880

1,880

1,940

2,000

2,000

2,070

2,140

2,140

2,000

1,880

1,880

1,810

1,880

1,940

1,940

2,000

2,000

2,000

2,000

2,000

1,940

1,940

_

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

2,OOO

, 2,140

2,670

2,750

2,670

2,590

2,670

2,590

2,590

2,670

2,750

2,590

2,360

2,210

2,210

2,140

2,210

2,210

2,280

2,440

2,510

2,360

2,360

2,360

2,360

2,360

2,440

2,440

2,510

2,670

2,830

Apr.

3,080

3,240

3,420

3,510

3,600

3,510

3,510

3,420

3,330

3,330

3,330

3,330

3,510

3,510

3,510

3,420

3,420

3,330

3,330

3,240

3,160

3,160

3,160

3,330

3,510

3,700

3,930

4,180

4,460

4,760

-

Secondfoot-days

33,890

69,620

72,360

"Lf 536^670

61,780

54,900

75,940

105,280

222,890

247 890

99. J 920

58,400

95,480

1,248,350

May

5,260

5,910

6,370

6,610

6,850

6,610

6,370

5,910

5,260

5,060

4,360

4,960

5,910

8,640

10,400

9,790

9,200

9,200

8,920

8,110

7,350

6,610

6,370

6,610

7,350

7,850

8,110

3,110

8,370

7,850

8,110

Maximum

3,380

2,750

3,160

16^ 800

2 210 2)140

2 ,830

4,760

10,400

11,700

5,470

2,590

3,800

11,700

June

8,920

10,400

11,700

11,100

11,100

11,400

11,700

11,100

11,400

11,400

10,100

9,490

8,920

8,110

7,850

7,350

7,100

6,610

6,610

7,100

7,850

7,600

6,850

6,140

5,690

5,060

4,660

4,560

4,760

5,260

Minimum

g 3VC

1*94C

1.18C

1 , 18C

1 58C

i)aic

2,OOC

3,08C

4,86C

4,56C

2 OOC

ilsac

1.69C

1,18C

July

5,470

5,260

4,960

4,860

4,660

4,560

4,460

4,270

-3,980

3,800

3,600

3,510

3,420

3,080

3,030

2,910

2,750

2,510

2,360

2,280

2,280

2,210

2,140

2,000

2,000

2,000

2,140

2,510

2,070

2,280

2,510

Aug.

2,590

2,510

2,440

2,360

2,280

2,140

2,000

1,940

1,810

1,810

1,750

1,750

1,750

1,750

1,750

1,810

1,750

1,690

1,690

1,640

1,640

1,640

1,580

1,640

1,690

1,690

1,810

1,810

1,810

1,880

2,000

Mean

2,706

2, 321

2,334

4 199

1,993

1,961

2,450

3,509

7,190

8,263

3 223

1*884

3,183

3,420

Sept.

2,510

2,140

1,690

2,140

2,360

2,440

2,590

2,910

3,030

3,160

3,240

3,160

3,160

3,240

3,510

3,600

3,600

3,600

3,700

3,600

3,600

3,700

3,800

3,700

3,700

3,600

3,600

3,510

3,420

3,420

""

Runoff in 

acre-feet

166,400

138,100

143,500

3,047,900

122,500

108,900

150,600

208,800

442,100

491,700

115)800

189,400

2,476,000

* Winter discharge measurement made on this day. 

b Stage-discharge relation affected by ice. 

h Computed from staff gage readings.
112 PEND OREILLE RIVER BASIN

Clark.Fork near Plains, Mont.

on.- Water-stage recorder, lat. 47°26', long. 114°51', on lot 7, SWi sec. 1, T. 19 

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 1941.

Average discharge.- 25 years (1912-15, 1917-19, 1920-24, 1925-41), 17,940 second-feet.

Extremes.- Maximum discharge during year, 32,200 second-feet June 6 (gage height, 8.91 

reet); minimum, 3,200 second-feet Dec. 10 (gage height, 2.85 feet).

1910-41: Maximum discharge, 126,000 second-feet May 28, 1928 (gage height, 18.4 

feet); minimum, 3,200 second-feet Feb. 8, 1936 (affected by Ice), Dec. 10, 1940.

Remarks.- Records excellent except those for periods of Ice effect, which are good, 

rany diversions above station for Irrigation. Partial regulation since April 1938 

at Kerr Dam, 4 miles below Klathead Lake (see p. 146).

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

Z

S

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

7,060

7,620

7,810

7,810

7,620

7,620

7,430

7,430

7,430

7,240

7,060

7,060

7,240

7,240

7,060

6,870

7,060

7,060

7,060

6,870

6,870

6,600

6,500

6,500

6,870

7,060

7,060

7,060

7,060

7,060

7,060

Nov.

6,870

6,870

6,870

7,060

6,870

7,060

6,870

6,870

6,870

6,870

6,870

6,680

6,500

6,320

6,130

5,950

6,500

6,680

6,320

6,320

6,500

6,680

6,320

6,680

6,500

6,130

6,680

6,670

6,870

7,060

Dec.

6,870

6,870

6,680

6,870

5,080

5,080

5,080

4,430

3,850

 3,450

4,230

4,920

5,080

5,420

5,770

b5,600

b5,500

b5,500

b5,700

b6, 200

b6,600

b5,600

5,950

7,060

7,430

7,430

7,S10

b7,800

b7,900

7,620

7,620

Jan.

7,430

7,240

b7,200

b7,100

b7,500

b7,400

b7,600

b7,800

b7,400

b7,700

b7,900

b7,700

b8,200

b8,000

8,400

8,000

8,400

7,810

8,000

7,810

7,810

7,810

9,000

7,430

8,400

7,810

8,000

8,000

*8,000

7,810

7,810

Feb.

8,000

7,620

7,810

7,620

7,810

7,620

8,200

,240

,430

,620

,620

,810

,810

,810

,620

,810

,810

,620

,620

,620

,810

,620

,620

,620

,810

,620

,620

,240

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

June ........... ... < .......................

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

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

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

Water year 1940-41 ......................

Mar.

7,060

5,770

6,320

7,240

7,240

,060

,060

,060

,060

,500

,240

,240

,060

6,670

6,870

6,680

6,680

6,680

6,870

6,870

,240

,060

,240

,060

,060

,060

,060

,060

,060

,240

,240

Apr.

7,430

7,620

7,240

7,810

7,810

8,400

8,800

8,400

9,000

9,200

9,400

9,600

9,800

10,000

10,000

10,000

10,000

9,600

9,600

9,600

9,600

9,400

9,400

9,600

9,600

10,000

10,400

10,800

11,600

11,600

S condfo t-days

221 ,250

199,640

187,050

4 149 720

242 270

215,080

215,810

403^400

581,300

274,040

190,950

216,450

3,228,550

-

May

11,600

12,000

12,000

12,000

11,200

10,800

10,400

10,400

10,000

9,800

9,400

9,400

9,800

12,500

14,600

14,200

13,700

13,700

13,300

12,900

12,000

11,200

10,600

10,800

11,600

12,000

19,500

26,000

20,400

18,500

16,900

Maximum

7,810

7,060

7,900

47,200

9,000

7^240

11,600

26,000

31,500

18, 000

6 ,870

8,200

31,500

June

19,000

20,600

22,400

25,400

30,000

31,500

26,000

23,500

22,400

24,100

22,400

20,600

20,100

20,600

23,500

23,000

18,000

15,100

13,300

12,000

20,600

20,500

15,100

13,700

13,300

12,900

12,500

12,500

12,500

14,200

-

Minimum

6,500

5,950

3,450

3,450

7,100

7,240

5,770

7,240

9,400

12,000

6, 32C

5,250

*

3,450

July

17,400

18,000

14,000

12,000

10,800

10,800

10,800

11,600

11,200

9,600

9,000

8,400

8,200

8,000

8,200

7,430

7,060

6,870

6,680

6,680

6,500

6,500

6,500

6,500

6,320

6,320

6,500

6,500

6,500

6,500

6,680

Aug.

6,870

6,870

6,870

6,680

6,680

6,500

6,320

6,320

6,320

6,320

6,130

6,130

6,130

6,130

6,130

6,130

6,130

5,420

5,250

- 5,950

5,950

5,950

5,950

5,950

5,420

5,600

6,130

6,320

6,320

5,950

6,130

Mean

7 137

e'ess

6,034

11,340

7,815

6^962

9 377

13^010

8,640

6,160

7,215

8,845

Sept.

6,500

5,420

3,990

5,770

6,680

6,870

7,060

7,240

7,430

7,240

7,430

7,430

7,080

7,240

7,240

7,430

8,000

8,000

8,000

7,620

7,810

8,000

8,000

8,000

8,200

7,810

7,620

7,430

6,870

7,060

-

Runoff in 

acre-feet

438, 800

396,000

371,000

8,230,000

480,500

426,600

428,100

558,000

800,100

1,153,000

543,600

378,700

429 300

6,404,000

» Winter discharge measurement made on this day. 

b Stage-discharge relation affected by Ice.
PEND OREILLE RIVER BASIN 

Clark Fork near Heron, Mont.

113

Location.- Water-stage recorder, lat. 48°04', long. 115°59', in sec. 28, T. 27 N., R. 34 

W., 600 feet upstream from Dead Horse Creek and 14 miles northwest of Heron.

Drainage area.- 21,800 square miles.

Records available.- September 1928 to September 1941.

Average discharge.- 13 years, 18,080 second-feet.

Extremes.- Maximum discharge during year, 35,200 second-feet June 7 (gage height. 23.15 

feet); minimum, 2,730 second-feet (regulated) Dec. 11 (gage height, 8.75 feet), from 

rating curve extended below 4,000 second-feet.

1928-41: Maximum discharge, 137,000 second-feet June 17, 1933 (gage height, 46.62 

feet, present datum); minimum, 620 second-feet Dec. 23, 1935, during period of extreme 

regulation (gage height, 7.59 feet), from rating curve extended below 4,000 secondfeet.

Maximum stage known, 59.1 feet, present datum, June 1894;

Remarks.- Records good. Flow subject to regulation on Flathead River; power plant at 

Thompson Falls causes diurnal fluctuation during low water. Considerable water 

diverted from tributaries above station for Irrigation.

Rating table, water year 194O-41 {gage height, In feet, and discharge, In second-feet)

10.0

10.4

10.8

11.2

4,540

5,160

5,800

6,470

12.0

13.0

14.0

15.0

7,910

9,920

12,120

14,470

16.0

18.0

20.0

22.0

16,950

22,310

28,140

34,550

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23-

24

25

26

27

28

29

30

31

Oct.

7,170

7,910

7,910

8,890

7,720

8,690

7,530

8,890

7,530

7,720

8,290

3,490

7,720

7,170

7,530

7,720

7,530

8,290

8,690

7,530

5,960

7,170

6,990

7,530

7,350

7,720

7,720

8,100

7,720

7,530

7,350

Nov.

7,720

7,910

8,100

8,100

7,350

8,100

7,910

7,720

7,910

7,530

6,990

7,720

6,810

6,130

6,990

6,810

6,300

6,990

6,990

6,990

6,810

6,990

7,720

7,170

6,640

7,350

6,810

7,350

7,350

7,530

-

Dec.

7,530

7,530

7,350

7,530

7,530

5,640

5,960

6,300

4,840

4,690

4,390

5,000

5,960

7,350

6,470

5,480

5,640

6,990

6,130

6,990

6,990

7,720

6,300

7,170

7,350

8,100

8,100

8,490

9,090

9,290

8,290

Jan.

8,490

8,890

8,890

8,490

8,100 %

6,810

6,810

7,910

8,290

8,290

8,890

8,290

3,490

8,690

8,890

9,710

9,290

9,920

8,690

7,530

8.100

8,490

9,290

9,710

9,710

9,710

6,470

8,290

8,490

8,890

8,100

Feb.

8,890

8,290

3,690

3,100

8,490

8,690

8,590

9,710

8,390

6,470

8,100

8,690

3,290

S,690

8,690

8,490

8,100

8,490

8,100

 8,490

9,290

8,490

8,690

8,100

9,090

8,690

7,170

7,530

_

-

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar

7,910

7,720

6,810

7,720

8,290

8,290

8,290

8,290

8,290

8,690

7,530

7,910

8,690

8,100

7,720

7,720

7,720

6,810

7,350

7,530

7,910

7,910

8,290

7,720

8,100

7,910

8,100

8,100

8,690

8,100

8,490

Apr.

8,690

9,090

9,290

9,090

10,300

9,920

9,290

9,920

10,100

10,800

11,000

11,400

11,900

11,900

12,400

12,800

12,400

12,100

12,100

12,100

9,920

11,200

11,400

11,700

11,700

12,400

12,800

13 , 300

13,500

14,700

-

Secondfcot-days

240,060

218,790

212,190

4,811,160

264,610

236,090

246,700

339,210

509,900

672,400

320,610

214 750

239^210

3,714,520

May

15,200

16,000

16,200

16,200

15,400

14,700

13,300

13,500

13,300

13,000

12,600

11,200

12,800

13,500

16,000

18,000

18,000

18,500

18,200

17,500

16,400

15,700

15,000

14,500

14,500

15,000

16,700

26,600

28,100

21,800

22,000

Maximum

8,890

8,100

9,290

52,200

9,920

9,710

8,690

14,700

28,100

34,600

19,600

8,690

9,290

34,600

June

20,900

24,300

25,200

26,900

30,600

34,600

33,200

28,400

26,300

26,900

26,900

25,500

23,400

22,900

24,900

26,600

24,900

20,100

17,500

15,400

15,400

25,200

20,100

17,000

16,000

15,400

14,500

14,500

14 , 200

14,700

-

Minimum

5,960

6,130

4,390

3,670

6,470

6,470

6,810

8,690

11,200

14,200

5,480

5,160

4 840

4,390

July

17,200

19,600

19,000

15,400

14,000

12,400

11,400

12,400

12,800

12,400

11,200

9,920

9,710

9,710

9,710

8,890

8,290

8,690

7,720

8,290

6,990

7,350

7,350

8,100

7,910

9,090

6,640

5,480

7,910

7,530

7,530

Aug.

,530

,720

,720

,170

,530

,350

,350

7-, 910

8,100

7,350

5,960

6,810

6,990

6,810

6,470

7,720

6,130

6,470

5,960

6,130

6,990

8,690

6,990

6,130

5,800

7,910

6,990

5,800

5,160

6,640

6,470

Mean

7,744

7,293

6,845

13,150

8,536

8,432

7,958

11,310

16,450

22,410

10,340

6,927

7,974

10,180

Sept.

6,810

7,350

6,130

4,840

6,640

8,290

8,100

6,640

7,350

8,100

8,100

8,100

8,100

7,910

8,290

7,910

8,290

8,890

8,890

9,090

9,290

7,720

9,090

8,890

9,710

7,910

8,290

8,290

8,100

8,100

-

Runoff in 

acre- feat

476,200

434,000

420,900

9,543,000

524,800

468,300

489,300

672,800

1,011,000

1,334,000

635,900

426,000

474,500

7,368,000
114 PEND OREILLE RIVER BASIN

Pend Orellie Lake at Hope, Idaho

Location.- Water-stage recorder, lat. 48°15', long. 116°18', in lot 2, sec. 35, T. 57 N. 

R. IE., at floating dock near Northern Pacific Ry. station at Hope. Datum of gage 

is 2,000.00 feet above mean sea level (U. S. Coast and Geodetic Survey datum).

Drainage area.- 22,900 square miles.

Records available.- September 1921 to September 1941. March 1914 to September 1922, at 

site at Sandpoint.

Extremes.- Maximum elevation during year, 2,052.49 feet June 12; minimum, 2,047.19 feet

1921-41: Maximum elevation, 2,068.78 feet June 21, 1933; minimum, 2,046.47 feet 

Feb. 17, 1936.

Maximum elevation known, 2,076.08 feet June 1894.

Remarks.- Considerable water diverted from tributaries of Clark Fork for irrigation.

(Jage height, In feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

47.40

47.40

47.44

47.48

47.49

47.52

47.53

47.54

47.55

47.56

47.59

47.58

47.59

47.59

47.57

47.57

47.56

47.57

47.58

47.59

47.60

47.57

47.53

47.55

47.58

47.56

47.57

47.60

47.60

47.62

47.66

Nov.

47.65

47.66

47. 6S

47.69

47.64

47.62

47.64

47.67

47.70

47.70

47.66

47.62

47.61

47.55

47.51

47.51

47.48

47.47

47.46

47.45

47.46

47.44

47.44

47.45

47.46

47.45

47.47

47.49

47.50

47.50

-

Dec.

47.52

47.53

47.53

47.53

47.55

47.57

47.53

47.50

47.48

47.41

47.36

47.29

47.25

47.24

47.24

47.20

47.23

47.30

47.32

47.35

47.39

47.41

47.43

47.45

47.49

47.52

47.58

47.62

47.66

47.71

47.74

Jan.

47.76

47.77

47. 7S

47.79

47.80

47.79

47.74

47.72

47.72

47.72

47.73

47.73

47.73

47.74

47.77

47.79

47.84

47.94

47.99

47.98

47.94

47.91

47.91

47.95

47.99

48.04

48.05

48.00

47.99

47. 9S

47.98

Feb.

47.97

47.98

47.98

47.97

47.94

47.92

47.93

47.92

47.96

47.94

47.92

47.91

47.92

47.91

47.91

47.91

47.89

47.88

47.88

47.87

47.86

47.87

47.87

47.86

47.86

47.87

47.66

47.86

_

-

Mar.

47.89

47.95

48.00

48.00

48.01

48.05

48.06

48.10

48.11

48.13

48.14

48.12

48.11

48.12

48.11

48.10

48.08

48.09

48.09

48.08

48.08

48.08

48.09

48.09

48.08

48.07

48.05

48.06

48.07

48.10

48.12

Apr.

48.14

48. IS

48.24

4S.30

48.35

4S.41

48.43

48.46

48.48

48.51

48.55

48.59

48.65

48.71

48.79

48.88

48.94

48.98

49.01

49.05

49.06

49.05

49.07

49.09

49.12

49.17

49.21

49.26

49.33

49.39

May

49.51

49.64

49.76

49.88

49.99

50.05

50.07

50.08

50.07

50.02

49.99

49.96

49.95

49.99

50.03

50.13

50.37

50.63

50.80

50.91

50.98

50.98

50.94

50.90

50.88

50.84

50.79

50.87

51.09

51.26

51.36

June

51.42

51.50

51.58

51.68

51.82

52.02

52.27

52.42

52.46

52.47

52.48

52.48

52.43

52.35

52.29

52.28

52. 2S

52.20

52.06

51.90

51.67

51.55

51.60

51.49

51.36

51.19

51.04

50.94

50.81

50.69

-

July

50.60

50.60

50.60

50.56

50.48

50.36

50.22

50.10

49.98

49.89

49.79

49.66

49.53

49.42

49.30

49.21

49.10

48.99

48.90

48.78

48.71

48.60

48.50

48.42

48.35

48.30

48.27

48.18

48.11

48.08

48.03

Aug.

48.00

47.95

47.94

47.91

47. S7

47.86

47.83

47.80

47.81

47.80

47.77

47.74

47.70

47. 6S

47.66

47.64

47. 6S

47.61

47.60

47.56

47.54

47.54

47.58

47.58

47.55

47.51

47.56

47.58

47.53

47.52

47.50

Sept.

47.49

47.50

47.53

47.52

47.48

47.49

47.52

47.53

47.54

47.55

47.61

47.64

47.68

47.73

47.75

47.76

47.79

47.84

47.90

47.91

47.94

47.96

47.96

47.98

47.98

48.02

48.00

47.98

47.98

47.99

Note.- Add 2,000 feet to obtain elevations above mean sea level.
PEND OREILLE RIVER BASIN 115

Pend Oreille River at Priest River, Idaho

Location.- Water-stage recorder, lat. 48°10'30", long. 116°55'30"; in lot 4, sec. 26, T.

 56 N., R. 5 W., at town of Priest River, 1$ miles downstream from Priest River. Datum 

of gage is 2,000.0 feet above mean sea level, datum of 1929. Discharge measurements 

made at highway bridge at Newport, Wash., 6 miles downstream.

Drainage area.- 24,200 square miles.

Records avallable.- June 1903 to April 1905, October 1921 to September 1941 (discontinued)

 June 1903 to September 1921, published.as Clark Fork at Newport, Wash.

Average discharge.- 38 years, 24,820 second-feet (adjusted for change in contents in Pend 

Orellie Lake).

Extremes.- Maximum discharge during year, 30,200 second-feet June 8, 11, 12 (gage height, 

49.45 feet); minimum, 3,960 second-feet Dec. 17, 18 (gage height, 43.67 feet).

1903-41: Maximum discharge, 136,000 second-feet June 15, 1913, and June 21, 1933; 

minimum, 2,200 second-feet Dec. 12, 1919.

Maximum stage known, 38.9 feet June 1894, from floodmarks, referred to Newport gage 

(discharge, 217,000 second-feet, estimated).

Remarks.- Records good except those for periods of Ice effect or no gage-height record 

and those for period of shifting control, which are fair. Many small diversions from 

upper tributaries for irrigation. Flow subject to natural regulation in Pend Oreille 

Lake (see p. 114) and artificial regulation on Flathead River, and to slight regulation 

during log-driving seasons by flash dam on tributary of Priest River.

Cooperation.- Gage-height record collected in cooperation with U. S. Weather Bureau.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

S

4

e

6 

7 

S 

9 

10

11 

12 

13 

14ie

16 

17 

IS 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29

30 

31

Oct.

7/380 

7,650 

*7,460 

7,870 

7,950

8,070 

8,180 

S.110 

8,180 

8,220

8,220 

8,500 

8,540 

8,530 

3,460

3,700 

8,660 

3,540 

8,660 

3,740

3,620 

8,740 

8,630 

3,740 

8,820

9,300 

9,020 

8,930 

9,180 

9,300 

9,430

Nov.

9,510 

9,470 

9,430 

9,470 

9,350

9,260 

9,260 

9,260 

9,300 

9,140

»S,900 

3,750 

8,650 

3,500 

8,400

8,350 

8,300 

8,300 

8,380 

3,500

8,620 

8,260 

8,340 

3,460 

6,340

8,340 

8,500 

3,500 

8,580 

3,580

Month

Dot 

Nor 

Dec

Ca.

Jam 

Feb 

Mam 

Apr 

May 

Jim 

Juli 

Augi 

Sep

Wa

Lendar year 1940

tor year 1940-41

Deo.

3,700 

8,780 

8,660 

8,740 

3,660

S,S60 

3,860 

8,580 

3,380 

8,200

3,000 

7,800 

7,570 

7,420 

7,300

7,200 

4,800 

4,190 

6,460 

7,910

8,100 

8,300 

8,500 

3,660 

3,780

9,020 

9,130 

9,430 

9,590 

9,760 

9,760

Jan.

9,880 

9,920 

9,950 

10,000 

10,000

10,000 

10,100 

9,840 

9,760 

9,710

9,800 

9,840 

9,800 

9,900 

9,960

10,000 

10,000 

10,200 

10,500 

10,900

11,100 

11,200 

10,900 

10,900 

11,200

11,400 

11,500 

11,300 

11,300 

11,100 

 11,100

Feb.

11,100 

11,100 

11,100 

11,200 

11,300

11,300 

10,800 

10,900 

11,000 

11,000

11,000 

10,800 

10,800 

10 , 800 

10,800

10,600 

10,800 

10,700 

10,600 

10,500

 10,500 

10,500 

10,700 

10,700 

10,300

10,600 

10,600 

10,800

Mar.

11,100 

11,400 

11,500 

11,600 

11,600

11,500 

11,600 

11,200 

11,700 

12,000

12,100 

12,200 

12,000 

11,700 

11,800

11,700 

11,600 

11,300 

11,700 

11,600

11,700 

11,600 

11,600 

11,700 

11,700

12,000 li.eoo

11,700 

11,300 

11,900 

12,000

Observed

Discharge in 

second feet

Maximum

9,430 

9,510 

9,760

54,800

11,500 

11,300 

12,200 

17,000 

25,200 

30, 100 

21,400 

10,000 

10,500

30,100

Mini7,380 

8,260 

4,190

4,190

9,710 

10,300 

11,100 

12,400 

17,400 

31,600 

10,300 

7,910 

7,720

4,190

Mean

3,497 

8,767 

8,198

16,040

10,420 

10,320 

11,690 

14,630 

21,340 

26,990 

15,740 

8,735 

9,294

12,920

Runoff 

in 

acre-feet

522, 50C 

521, 70C 

504, 10C

l!,640,OOC

640, SOC 

601, 20C 

718, 80C 

870, SOC 

1,312,OOC 

1,606,OOC 

967, 90C 

537.10C 

553, 10C

9,356,OOC

Apr,

12,600 

12,400 

12,600 

12,900 

12,900

12,900 

13,200 

13,200 

13,300 

13,300

13,400 

13,800 

14,300 

14,500 

14,200

15,000 

15,500 

15,600 

15,700 

15,700

15,600 

15,600 

15,700 

16,000 

16,000

16,200 

16,200 

16,500 

16,800 

17,000

May

17,400 

18,100 

18,400 

19,000 

13,900

19, 800 

20,000 

20,200 

20,200 

20,200

20,000 

19,600 

19,600 

19,800 

20,000

20,400 

21,500 

22,600 

23,100 

23 , 500

23,500 

23,800 

23,500 

23,100 

22,800

23,200 

22,600 

23,000 

23,800 

24,700 

25,200

contents in 

Pend Oreille 

Lake 

(acre-feet)

+20,910 

-13,440 

+20,160

+6,640

+20,160 

-10,080 

+21,840 

+107,700 

+170,200 

-58,290 

-227,100 

-44,520 

+41,160

+48,700

June

25,300 

25,700 

26,100 

26,500 

27,200

23,100 

29,000 

29,800 

30,100 

30,000

30,100 

30,000 

29,900 

29,400 

29,000

29,000 

28,900 

23,700 

23,000 

27,200

26,500 

25,900 

25,500 

25,000 

24,500

24,000 

23,400 

22,700 

22,400 

21,300

July

21,400 

21,400 

21,400 

21,300 

20,800

20,400 

19,600 

19,100 

18,600 

18,400

17,900 

17,500 

16,900 

16,400 

16,000

15,500 

15,200 

14,700 

14,100 

13,600

13,100 

12,700 

12,500 

12,200 

11,800

11,500 

11,400 

11,100 

10,700 

10,500 

10,300

Aug.

10,000 

9,920 

9,630 

9,710 

a9,400

a9,400 

a9,400 

a9,300 

a9,200 

a9,100

9,220 

8,660 

8,900 

8,780 

8,780

3,500 

8,500 

8,420 

8,180 

3,030

8,030 

7,910 

8,030 

3,140 

8,110

8,140 

8,380 

8,540 

8,300 

8,030 

7,950

Sept.

 7,910 

3,030 

7,990 

3,070 

7,720

7,960 

8,300 

8,260 

3,460 

8,540

8,700 

3,360 

8,940 

8,900 

9,140

9,340 

9,510 

9,710 

10,000 

10,200

10,300 

10,500 

10,500 

10,500 

10,500

10,300 

10,500 

10,500 

10,300 

10,400

Adjusted for change 

in reservoir contents

Runoff 

in 

acre-feet

543,400 

508,300 

524,300

11,650,000

661,000 

591,100 

740,600 

973,000 

1,482,000 

1,548,000 

740,800 

492,600 

594,300

9,405,000

Discharge in 

second-feet

Per 

Wean square 

mile

8,838 .36E 

8,542 .35Z 

8,527 .35S

16,050 .662

10,750 .444 

10,640 .44C 

12,040 .49£ 

16,440 .67£ 

24,100 .99« 

26,020 1.08 

12,050 .49E 

8,011 .33] 

9,988 .412

12,990 .53 r

Run 

in 

inches

.42 

.39 

.41

9.02

.51 

.46 

.57 

.76 

1.15 

1.20 

.57 

.38 

.46

7.28

» Winter-discharge measurement made on this day.

a No gage-height record; discharge computed on basis of rpcords for station below Z Canyon, near 

Metaline Falls.

Note.- Stage-discharge relation affected by ice, Nov. 5, 11-17, Dec. 10-12, 15, 16, 21-23, Jan. 3, 

14, 16-21, 24, Feb. 17, 18. Shifting-control method-used Oct. 1 to Nov. 2. Contents of Pend 

Oreille Lake based on mean gage heights for last day of each month.
116 PEND OREILLE RIVER BASIN

Pend Orellie River below Z Canyon, near MetalIne Falls, Wash. 

(International gaging station)

Location.- Water-stage recorder, lat. 48°59', long. 117°21', In lot 2, sec. 11, T. 40 N.,

R. 43 E., three-quarters of a mile downstream from Z Canyon, It miles south of international boundary, 5 miles downstream from Slate Creek, and 10 miles downstream from

Metaline Falls.

Drainage area.- 25,200 square miles. 

Records available.- October 1928 to September 1941. November 1908 to September 1910 and

October 1912 to September 1928, at site at Metaline Falls, 10 miles upstream, published

as Clark Fork at Metaline Falls, Wash. 

Average dlscharge.- 29 years (1912-41), 25,230 second-feet (adjusted for storage in Pend

Orellie Lake). 

Extremes.- Maximum discharge during year, 32,200 second-feet June 13 (gage height, 19.10

feet) nlnimum, 5,550 second-feet Dec. 20 (gage height, 9.99 feet).

1912-41: Maximum discharge, 139,000 second-feet June 16, 1913 (gage height, 41.2

feet, site and datum then in use); minimum, 2.500 second-feet Dec. 12, 1919 (gage

height, -2.4 feet, site and datum then in use). 

Remarks.- Records excellent except those for periods of Ice effect and doubtful gage-height

record, which are fair. Many small diversions from upper tributaries for irrigation.

Flow regulated by natural storage In Pend Oreille Lake and by artificial regulation on

Flathead River. 

Cooperation.- This Is one of the International gaging stations maintained by the United

States under agreement with Canada.

Rating table, water year 1940-41 (gage height, in feet, and discharge, In second-feet)

10.0 5,570 12.0 9,560 14.0 14,900 16.0 21,300 1S.O 23,800

11.0 7,480 13.0 12,000 15.0 18,100 17.0 25,400

Discharge, In second-feet, water year October 1940 to September 1941

Day

1 

Z 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

26

26 

27 

28 

29

30 

31

Oct.

8,000 

7,900 

7,940 

8,000 

8,000

8,180 

3,300 

3,410 

8,460 

3,600

3,660 

8,510 

8,680 

8,890 

S,S90

8,780 

3,740 

8,330 

3,720 

3,740

8,950 

8,860 

8,300 

8,970 

9,340

9,140 

9,230 

9,430 

9,250 

9,410 

9,560

Nov.

9,690 

9,740 

9,740 

9,670 

9,580

9,740 

9,780 

9,830 

9,630 

*9,600

9,430 

9,320 

9,190 

09,100 

09,000

03,900 

133,800 

08,800 

3,760 

8,700

8,740 

8,830 

8,700 

8,660 

8,720

8,720 

8,740 

8,870 

8,910 

8,950

Month

Oct 

Nov 

Dec

Ca.

Jam 

Fob 

Man 

Apr 

May 

Jun 

Jul 

Aug 

Sep

Wa

amber.. .........

.endar year 1940

ber year 1940-41

Dec.

8,970 

9,040 

9,060 

9,100 

9,230

9,320 

9,190 

9,320 

9,230 

8,970

1)8,800 

b8,600 

1)8,400 

b8,200 

8,040

07,900 

b7,700 

b7,480 

d5,990 

5,930

7,740 

8,780 

9,100 

9,210 

9,470

9,600 

9,710 

9,900 

9,990 

10,200 

10,300

Jan.

10,300 

10,300 

10,300 

10,400 

10,300

10,600 

10,500 

10,500 

10,400 

10,300

10,100 

10,100 

10,200 

10,200 

10,300

10,300 

10,300 

10,600 

11,000 

11,200

11,400 

11,400 

11,500 

11,200 

11,200

11,500 

11,600 

11,800 

11,700 

*11 ,700 

11,600

Pet).

11,600 

11,600 

11,500 

11,600 

11,600

11,600 

11,700 

11,400 

11,300 

11,400

11,500 

11,500 

11,500 

11,600 

11,300

11,300 

11,200 

11,200 

11 ,300 

*11,200

11,200 

11,100 

11,000 

11,100 

11,200

10,900 

11,000 

11,400

Mar.

11,400 

12,200 

12,700 

12,800 

12,800

12,700 

12,700 

12,700 

12,600 

12,500

12,800 

12,900 

12,900 

12,900 

12,600

12,500 

12,600 

12,800 

12,600 

12,800

12,900 

12,900 

13,000 

13,100 

13,200

13,200 

13,600 

13,800 

13,800 

14,000 

14',100

Observed

Discharge In 

second-feet

Maximum

9,560 

9,830 

10,300

56,600

11,800 

11,700 

14,100 

17,800 

26,900 

32,000 

23,300 

10,200 

10 ,800

32,000

Minimum

7,900 

8,660 

5,930

4,850

10,100 

10,900 

11,400 

14,200 

18,500 

24 ,000 

10,500 

8,060 

7,880

5,930

Mean

8,715 

9,161 

8,789

16,950

10,800 

11,350 

12,900 

15,680 

22,770 

29,110 

16 ,570 

8,914 

9,431

13,680

Runoff 

In 

acre-feet

535,800 

545,100

540,400

12,310,000

664,100 

630,300 

793,400 

932,800 

1,400,000 

1,732,000 

1,019,000 

548,100 

561,200

9,902,000

Apr.

14 ,400 

14,800 

14 ,300 

14,600 

14,600

14 ,500 

14,200 

14,300 

14,400 

14,400

14,600 

14,600 

14 ,800 

15,300 

15,700

15,400 

15 ,700 

16 ,200 

16,400 

16,500

16,600 

16,600 

16 ,700 

16,700 

16,900

17,000 

17,200 

17,200 

17 ,400 

17,800

May

18,500 

19,000 

19,500 

19,500 

20,700

20,500 

20,700 

21 ,100 

21,100 

21,200

21,200 

21,200 

20,900 

21,000 

21 ,000

21,200 

22,300 

23,600 

24,500 

25,100

25 ,500 

25,900 

26,200 

26.00C 

25,700

25.20C 

25,20C 

24 ,80C 

24,90C 

25 ,70C 

26.90C

contents In 

Pend Oreille 

Lake 

(acre-feet)

+20,910 

-13,440 

+20,160

+6,640

+20,160 

-10,080 

+21,840 

+107,700 

+170,200 

-58,290 

-227 ,100 

-44 ,520 

+41,160

+48,700

June

27,700 

27,700 

27,900 

28,300 

28 ,700

29,200 

29,900 

30 ,700 

31,400 

31,800

31,900 

32,000 

32,000 

31,700 

31 ,400

31,000 

31,000 

30,900 

30,800 

30,300

29,400 

23,900 

28,200 

27,500 

27,100

26,200 

25,700 

25,300 

24,600 

24,000 

_

July

23,300 

22,800 

22,500 

22,600 

22 ,400

21 ,800 

21,500 

20,500 

19,700 

19,000

18,600 

18,200 

17 ,800 

17,300 

16,800

16,300 

15,800 

15,400 

15,000 

14,400

13,900 

13,300 

12,800 

12,400 

12,200

12,000 

11,600 

11,400 

11,100 

10,700 

10,500

Aug.

10,200 

10,100 

9,940 

9,800 

9,630

9,650 

9,710 

9,650 

9,490 

9,430

9,410 

9,450 

9,210 

8,970 

3,800

8,740 

8,640 

3,490 

3,430 

8,260

8,160 

3,060 

3,080 

8,080 

8,100

8,180 

8,300 

8,380 

8,410 

8,410 

8,180

Sept.

8,080 

8,060 

8,160 

8,180 

8,120

7,960 

7,880 

3,000 

3,180 

8,470

8,870 

9,060 

9,040 

9,210 

9,250

9,300 

9,410 

9,690 

10,200 

10,600

10,700 

10,600 

10,700 

10,800 

10,800

10,800 

10,700 

10,700 

10,700 

10,700

Adjusted for change 

In reservoir contents

Runoff 

In 

acre feet

556,700 

531 ,700 

560,600

12,310,000

684,300 

620,200 

815,200 

1,040,000 

1,570,000 

1,674,000 

791,900 

'503 ,600 

602,400

9,951,000

Discharge In 

second-feet

Mean

9,054 

8,936 

9,117

16,960

11,1-30 

"11,170 

13,260 

17 ,480 

25,550 

28,130 

12,880 

8,190 

10,120

13 ,740

Per 

square 

mile

0.359 

.355 

.362

.673

.442 

.443 

.526 

.694 

1.01 

1.12 

.511 

.326 

.402

,54E

Runin

Inches

0.41 

.40 

.42

9.16

.61 

.46 

.61 

.77 

1.16 

1.26 

.69 

.37 

.45

7.40

* Winter-discharge measurement made on this day.

1> Stage-discharge relation affected by Ice.

d Doubtful gage-height record; discharge computed on basis of partly estimated gage heights.
PEND OREILLE RIVER BASIN 

Smaller reservoirs in Pend Oreille River Basin, Mont.

117

Georgetown Lake on Flint Creek, 2 miles west of Southern Cross, Mont., completed ii 1905

 to store 'water for pumpage into Warm Springs Creek for use of reduction works of 

Anaconda Copper Mining Co. at Anaconda, or for release through Flint Creek for power 

development, has usable capacity of 33,000 acre-feet. Records furnished by The 

Montana Power Co. . .

East Fork of Rock Creek Reservoir on East Fork of Rock Creek, 14 miles southwest of

 Phlllpsburg, Mont., completed in 1938 for Irrigation in Flint Creek Valley, has usable

capacity of 16,200 acre-feet. Records furnished by state Water Conservation Board. 

Nevada Creek Re'servoir on Nevada Creek, 7 miles west of Finn, Mont., completed in 1938 for

 irrigation, nas usaole capacity of 12,600 acre-feet. Records furnished by Montana

State Water Conservation Board. 

West Fork of Bitterroot River Tteservoir on West Fork of Bitterroot River, 7 miles upstream

 from Nez Perce Creek and 23 miles south of Darby, Mont., completed June 14, 1940, for 

irrigation, has usable capacity of 31,600 acre-feet. Records furnished by Montana 

State Water Conservation Board. ~

Como Lake on Rock Creek, 4 miles northwest of Darby, Mont., completed in 1909 for irri-

 gation, has usable capacity of 34,800 acre-feet. Records furnished by Bitterroot 

Valley Irrigation Co. Figure of change in contents for September 1940 published in 

Water-Supply Paper 902 has been corrected to 5,200.

Camas Reservoirs comprise a group of 4 reservoirs in the Little Bitterroot River Basin, 

which are operatsd for irrigation. Records furnished by Office of Indian Affairs. 

Little Bitterroot Lake on Little Bitterroot River, 2 miles southwest of Marion, completed in 1918, has usable capacity of 18,000 acre-feet. Water level below outlet during 

year. Hubbart Reservoir on Little Bittsrroot River, 9 miles northwest of Niarada, Mont., 

completed in 1923, has usable capacity of 12,100 acre-feet. Upper Dry Fork Reservoir 

on Dry Fork Creek, 4 miles northwest of Lonepine, Mont., completed in 1940, has usable 

capacity of 2,700 acre-feet. Dry Fork Reservoir on Dry Fork Creek, 1 mile west of Lonepine, Mont., completed in 1934, has usable capacity1 of 4,000 acre-feet.

Mission Valley Reservoirs comprise a group of 8 reservoirs in the area east of and tributary to tie Fiatheaa River between Flathead Lake and the Jocko River, which are 

operated for irrigation. Records furnished by the Office of Indian Affairs. Twin 

Reservoir fed entirely by canals, 4 miles southeast of Poison, Mont., completed in 

1932, has usable capacity of 600 acre-feet. Pablo Reservoir, fed entirely by canals, 

3 miles south-of Poison, Mont., completed in 1934, has usable capacity of 25,000 acrefeet. Lower Crow Reservoir on Crow Creek, 6 miles west of Ronan, Mont., completed in 

1933, has usable capacity of 10,350 acre-feet. Kicking Horse Reservoir, fed entirely 

by canals, 5 miles south of Ronan, Mont., completed in 1930, has usable capacity of 

8,350 acre-feet. Ninepipe Reservoir, fed entirely by canals, 2 niles northeast of 

Charlo, Mont., completed in 1923, has usable capacity of 14,870 acre-feet. McDonald 

Reservoir on Post Creek, 9 miles east of Charlo, Mont., completed in 1920, has usable 

capacity of 8,225 acre-feet. Mission Reservoir on Mission Creek, 4 miles east of 

St. Ignatius, Mont., completed in 1935, has usable capacity of 7,250 acre-feet. Tabor 

Reservoir on Dry Creek, 8 miles southeast of St. Ignatius, Mont., completed in 1940, 

has usable capacity of 23,300 acre-feet.

Lower Jocko Lake on Jocko River, 15 niles east of Arlee, Mont., completed in 1937, has

 usable capacity of 7,600 acre-feet. Records furnished by the Office of Indian Affairs. 

Thompson Falls Reservoir on Clark Fork, at Thompson Falls, Mont., for power development,

has usable capacity of 15,000 acre-feet. Records furnished by The Montana Power Co. 

Other reservoirs of small capacity, principally on tributaries of the Bitterroot River,

are operated for irrigation.

Monthly change in contents, In acre-feet, water year October 194O to September 1941

Month

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

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

Month

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

Calendar year 1940 ......................

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

Uav

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

Water year 1940-41 ......................

Georgetown 

Lake

-500 

+390 

+190

-1,740

+30 

-870 

-910 

+990 

+1,860 

+1 ,430 

+720 

-140 

+140

+2,730

Camas 

Reservoirs

+140 

+210 

+170

-710

+150 

+310 

t500 

+620 

-1,130 

-510 

-S20 

+440 

+160

+240

East Fork 

of 

Rook Creek 

Reserve!-*

a+1 ,500 

c+280 

c-2O

-6,440

c+1 ,020 

C+57O 

c+430 

0+730 

a+2,210 

c+3,99O 

a+150 

a-1,340 

a+340

+9 ,660

Nevada 

Creek 

Reservoir

a-120 

b+150 

0+120

-

0+580 

c+440 

c+1 ,710 

a+6SO 

a-1,650 

e-1,640 

a- 200

f-1,320

-1,300

.Mission Valley 

Reservoirs

+3 ,760 

+2.9SO 

+1,040

+6,020

+3,670 

+3.61O 

+3,780 

+7,400 

+12,290 

+13,440 

-33,050 

-19,800 

+1 ,820

+S90

West Pork 

of 

Bitterroot 

River 

Reservoir

b-1,800 

0 

O

0

O

d +7 ,500 

a+13,100 

+11 ,400 

0 

0 

0 

-27,000

+3,200

Lower 

Jocko Lake

f-1,440 

0

-1,440

0 

0 

0 

+780 

+7OO 

+500 

-1,060 

-60 

-860

-1,440

Como 

Lake

c+3,400 

0+900 

0+900

+2,000

e+ 1,700 

0+700 

0+2,000 

0+6,400 

c+3,700 

c+8,OOO 

0+16,600 

0-11,300 

c-2,7OO

+2,100

Thompson Falls 

Reservoir

+1,S90 

+1,610 

-1,180

-1,350

+1,340 

-160 

-160 

-1,600 

+440 

+4SO 

-1,550

f-1,060

0

a. Interpolated on basis of weekly readings. d Change since Feb. 2 when seasonal storage began. 

b Interpolated on basis of bi-weekly readings, e Estimated on basis of reading on July 5. 

o Reading made on first day of following month, f Change during period of 2 months.
118 PEND OREILLE RIVER BASIN 

Flint Creek near Southern Cross, Mont.

Locatlon.- Staff gage and Clppolettl weir, lat. 46°14', long. 113°18', In NWi sec. 36, 

mm., R. 14 W., half a mile downstream from power plant, 2 miles downstream from 

Georgetown Lake, 3 miles northwest of Southern Cross, and 6 miles south of Phllipsburg.

Records available.- October 1940 to September 1941.

Extremes.- Maximum discharge observed during year, 32 second-feet Oct. 1-15 (gage height, 

u.85 root); minimum observed, 1.4 second-feet Mar. 7 to Apr. S3, May 17-22 (gage 

height, 0.11 foot).

Remarks.- Records good. Gage read once daily. Flow regulated by Georgetown Lake (see 

P. 117).

Cooperation.- Gage-height record furnished by the Montana Power Co., under general 

supervision of the Geological Survey, In connection with a Federal Power Commission 

project. *

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

22

15

15

15

15

15

15

a!5

a!5

a!5

a!5

a!5

a!5

a!5

a!5

al5

Nov.

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

-

Dec.

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

Jan.

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

Month

Feb.

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

_

_

-

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

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

Calendar year ......................

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

15

15

15

15

15

15

10

1.4

1.4

1.4

' 1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

.4

.4

.4

.4

.4

1.4

Apr.

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

2.3

2.3

2.5

2.5

S.3

2.3

2.3

Seoondfoot-days

465

_

420

313.2

900

6,638.5

~

May

2.3

2.3

2»3

2.3

2.1

e.i

2.1

2.1

2.1

2.1

1.9

1.9

1.9

1.9

1.9

1.9

1.4

1.4

1.4

1.4

1.4

10

24

29

30

30

30

30

30

30

30

Maximum

32

15

15

_

15

30

30

30

30

32

June

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

31

30

30

30

30

30

30

-

Minimum

15

_

15

1.4

1.4

20

30

1.4

July

30

30

30

30

30

30

30

30

30

30

30

30

30

21

20

20

20

24

30

30

30

30

30

30

30

30

30

30

30

30

30

Aug.

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

Mean

15.0

15.0

_

15.0

15.0

4.31

10.1

28.5

30.0

IS. 2

Sept.

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

30

~

Runoff in 

acre- feet

1,440

893

922

_

922

833

265

97

621

1,790

1,760

1,840

1,790

13,170

a Ho gage-height record; discharge Interpolated.
PEND OREILLE RIVER BASIN 119

Flint Creek near Phllipsburg, Mont.

Location.- Wire-weight gage, lat. 46°23 1 45", long. 113°18'30", In NEi sec. 2, T. 7 N., 

R. 14 w., 14 miles downstream from Marshall Creek and 4 miles north of Philipsburg.

Records available.- April 1939 to October 1940 (discontinued).

Extremes.- Maximum discharge observed during October 1940, 80 second-feet Oct. 1 (gage 

height, 2.56 feet); minimum observed, 52 second-feet Oct. 30, 31 (gage height, 2.26 

feet).

1939-40: Maximum discharge observed, 157 second-feet June 5, 1939 (gage height, 

3.43 feet); minimum observed, 21 second-feet May 21, 1940.

Remarks.- Records good. Gage read twice dally. Many diversions above and below station 

for irrigation. During Irrigation season flow Is supplemented by water from East 

Fork of Rock Creek which Is diverted in sec. 5, T. 4 N., R. 14 W., 500 feet below 

Rock Creek Dam, through a canal Into Trout Creek, thence into Flint Creek. Some 

additional regulation from Georgetown Lake.

Discharge, In second-feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

76

72

72

64

64

60

64

64

64

64

64

64

68

68

64

64

60

60

60

60

56

56

60

60

56

56

56

56

56

52

52

Nov. 'Dec. Jan. Feb.

127

Month

October 1940 ... ...........................

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

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

Calendar year ......................

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

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

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

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

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

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

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

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

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

Water year ......................

Mar.

t31

Apr.

Secondfoot days

1,912

_

May

Maximum

76

_

June

Minimum

52

-

July Aug.

Mean

61 .7

_

Sept.

Runoff in 

acre- feet

3,790

_

t Result of discharge measurement.
120 PEND OREILLE RIVER BASl!N

Flint Creek at Maxville, Mont.

Location.- Wire-weight gage, lat. 46 027'30n , long. 113°14'30", in SW£ sec. 9, T. 8 N., R. 

13 W., three-quarters of a mile southwest of Maxvllle and 1-i miles upstream from 

Boulder Creek. Also after Aug. 4, 1941, a water-stage recorder at site half a mile 

downstream at different datum.

Records available.- April 1939 to September 1941 (discontinued) at original site." Also 

August to September 1941 at site half a mile downstream.

Extremes.- Maximum discharge observed during year, 290 second-feet June 1 (gage height, 

3.11 feet); minimum observed, 21 second-feet Jan. 3 (gage height, 1.16 feet).

1939-41: Maximum discharge observed, that of June 1, 1941; minimum observed, that 

of Jan. 3, 1941.

Remarks.- Records good. Gage read once dally. Many diversions above and below station 

for irrigation. During Irrigation season, flow Is supplemented by water from East 

Fork of Rock Creek which Is diverted in aec. 5, T. 4 N., R. 14 W., 500 feet below 

Rock Creek Dam, through a canal into Trout Creek, thence Into Flint Creek. Some 

additional regulation from Georgetown Lake. Increase In flow noted at new site caused 

principally by return of water, which seeps through railroad embankment above former 

site Into a marsh and reenters above present site as surface flow and seepage. Records 

for both sites are published below.

Discharge, In second-feet, (at upper site) water year October 1940 to Soptenber 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

77

72

72

67

66

64

65

65

64

63

63

63

65

72

64

65

63

61

59

59

58

58

59

58

57

57

57

57

56

55

56

Nov.

56

57

56

54

50

53

53

S3

54

51

47

a40

36

63

53

52

48

KL

42

47

51

33

36

51

51

S3

52

53

56

54

-

Dec.

49

53

56

60

54

56

54

54

48

44

25

b24

24

28

32

36

40

47

bSO

b49

b47

45

48

46

45

45

45

46

41

36

42

Jan.

24

22

*21

26

26

33

41

43

41

41

39

37

35

40

42

42

40

42

43

43

43

42

42

42

42

42

32

35

32

b34

35

Feb.

36

39

35

32

40

*32

35

32

40

39

38

39

35

30

24

36

29

32

37

39

38

43

38

37

38

24

40

42

_

_

-

Month

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

Calendar year 1940 ......................

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

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

 ay. ......................................

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

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

Water year 194O-41 ......................

Mar.

66

62

56

44

43

42

42

38

36

32

37

32

32

35

29

32

35

38

32

32

29

32

33

32

32

33

36

35

36

38

37

Apr.

34

35

32

32

32

34

32

31

30

31

36

45

36

35

32

34

40

37

35

40

45

44

41

66

50

46

46

44

46

46

Seoondfoot-days

1,369

19,169

2,571

20,460

May

48

49

48

4S

43

39

36

34

27

22

a27

32

89

110

61

51

48

58

47

39

36

23

32

36

31

72

89

77

59

60

62

Maximum

60

120

110

236

June

174

148

174

209

236

174

140

124

110

89

77

66

46

54

51

44

41

41

96

77

64

54

42

34

26

23

26

182

140

96

-

Minimum

24

23

44

61

21

July

63

83

77

77

89

72

89

89

67

64

60

62

54

57

54

4S

48

47

47

56

45

48

44

48

56

63

72

102

102

96

S9

Aug.

39

S9

89

78

65

62

58

59

60

62

64

72

110

83

77

77

77

67

67

67

67

58

58

59

57

60

62

60

64

65

61

Mean

44.2

52.4

36.8

67.4

68.9

85.7

56.1

Sept.

61

61

62

66

66

72

S3

77

77

89

83

110

96

89

89

89

83

83

102

102

102

96

89

89

89

S9

89

96

96

96

-

Runoff in 

acre-foot

2 970

2,720

38,050

4,140

4,240

5,100

40,580

* Winter dlacharge nearurement Bade en this day. b Stage-discharge relation affeeted by lee. 

a He gage-nelgbt record; dlaeharge estimated.

Mneharge, In second-feet, (at lower site) August and September 1941

Day

1 

2 

3 

4 

5 

6 

7 

8

Aug.

77 

72 

70 

68

Sept.

68

67 

68 

69 

71 

77 

85 

85

Day

9 

10 

11 

12 

13 

14 

15 

T6

Aug.

70 

72 

74 

S6 

120 

99 

91 

90

Sept.

87 

100 

98 

111 

102 

95 

97 

93

Month

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

Day

17 

18 

19 

20 

21 

22 

23 

24

Seoondfoot-days

2,083 

2,763

Aug.

86 

83 

77 

76 

78 

66 

69 

68

Sept.

92 

91 

101 

106 

110 

102 

98 

97

Maximum

120 

111

Day

25 

26 

27 

28 

29 

30 

31

Minimum

66 

67

Aug.

66 

67 

73 

68 

71 

74 

70

Sept.

96 

94 

97 

102 

101 

101

Mean

77.] 

92.1

Runoff ia 

acre-feet

4,130

5,480

Note.- Hie discharge at the ln*wr site on July 29 was measured as 108 second-feet.
PEND OREILLE RIVER BASIN 121

Trout Creek near Philipsburg, Mont.

Location.- Wire-weight gage, lat. 46°16'55n , long. 113°20'25", in NWi sec. 15, T. 6 N., 

R. 14 W., 300 feet upstream from mouth and 44 miles south of Philipsburg.

Records available.- May 1939 to September 1941 (irrigation seasons only).

Extremes.- Maximum discharge observed during period, 56 second-feet Aug. 13 (gage

Height, 2.75 feet); minimum observed, 12 second-feet June 26 (gage height, 1.76 feet). 

1939-41: Maximum discharge observed, 67 second-feet Aug. 7, 1939; minimum observed, 

3.6 second-feet May 26-29, June 2, 1940.

Remarks.- Records fair. Gage read once daily. Many diversions above station for irrigation. At times during irrigation eeason flow is supplemented by water from East Fork 

of Rock Creek which is diverted in sec. 5, T. 4 N., R. 14 W., 500 feet below Rock 

Creek Dam, through a canal into Trout Creek.

Discharge, in second-feet, water year October 1940 tc September 1941

Daj

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

32

30

30

32

33

34

35

35

35

35

35

35

37

36

36

35

35

35

35

35

35

35

35

35

35

35

35

35

35

35

35

Nov. Dec. Jan. Feb.

Month

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

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

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

Calendar year .....................

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

February .................................:

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

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

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

June 24-3O. . ..............................

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

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

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

Water year ......................

Mar.

til

Apr.

Secondfoot days

1,070

_

_

_

_

_

_

_

127

771

1.02S

764

-

May

t5.4

Maximum

37

_

_

_

_

_

_

_

26

60

56

33

-

June

_

-

_

-

-

_

-

-

-

-

_

-

-

-

-

_

-

-

-

-

_

-

-

IS

18

12

13

16

24

26

Minimum

30

_

_

_

_

_

_

_

12

16

24

23

-

July

26

26

20

20

17

16

IS

26

23

22

20

21

20

20

IS

IS

18

19

19

20

24

24

22

20

27

34

35

38

43

50

47

Aug.

47

44

46

33

33

32

32

24

24

26

26

30

56

a46

36

36

35

30

31

29

35

34

35

32

31

31

31

26

26

27

24

Mean

34.5

_

_

_

_

_

_

18*1

24.9

33.2

26.1

.-

Sept.

25

24

25

24

26

24

27

23

25

29

24

29

24

24

24

24

26

27

31

30

29

26

26

26

26

25

26

26

26

33

~

Runoff in 

acre- feet

2,120

_

_

_

_

_

_

_

252

1,530

2,040

1,560

-

t Result of discharge measurement.

a No gage-height record; discharge interpolated.
122 PEND OREILLE RIVER BASIN 

Marshall Creek near Philipsburg, Mont.

Location.- Wire-weight gage, lat. 46°22'25", long. 113°19'25", in SWi sec. 11, T. 7 N.,

 R. 14 W., a quarter of a mile upstream from mouth and 2$ miles north of Phillpsburg.

Records available.- April 1939 to September 1941 (irrigation seasons only).

Extremes.- Maximum discharge observed during period, 46 second-feet June 4, 5, (gage 

neignt, 1.90 feet), from rating curve extended above 15 second-feet; no flow at 

times.

1939-41: Maximum discharge observed, that of June 4, 5, 1941; no flow at times.

Remarks.- Records poor. Gage read once daily. Small diversions above station for

 irrigation. At times during irrigation season flow is supplemented by water from 

East Fork of Rock Creek which is diverted in sec. 5, T. 4 N., R. 14 W., 500 feet 

below Rock Creek Dam, through a canal into Trout Creek, thence into Marshall Creek.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

S

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

0.7

.7

.6

.7

.7

.8

.S

.8

.8

.S

.S

.9

.9

1.0

.9

1.0

1.0

. .9

.9

.9

.S

.9

.9

1.0

.9

1.0

.9

1.0

.S

.9

1.0

Nov. Dec. Jan. Feb.

Month

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

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

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

Calendar year ......................

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

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

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

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

May 15-31... ..............................

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

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

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

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

Water year ......................

Mar.

tO. 9

Apr.

Secondfoot-days

26.7

-

_

_

_

_

6.S

508.7

1S9.9

62.0

15.2

-

May

_

..

-

-

-

_

-

-

-

-

_

-

_

-

-

0 S

9

S

7

7

7

7

7

8

0

0

0

i 0

0

0

0

Maximum

1.0

-

-

_

_

_

.9

46

13

5.0

1.1

-

June

15

10

24

46

46

40

39

34

34

33

29

10

10

10

9.2

7.9

6.3

12

15

15

9.8

9.2

3.7

1.5

1.5

1.4

1.4

6.8

13

15

-

Minimum

0.6

-

-

_

_

_

0

1.4

1.3

0

0

-

July

12

10

10

10

12

13

13

10

7.9

7.9

7.9

9.2

7.9

7.3

6.0

6.0

6.6

6.0

6.0

3.7

2.1

1.3

1.4

1.4

1.6

1.6

1.4

1.4

1.4

1.8

2.1

Aug.

1.6

1.4

0

0

0

0

0

0

0

3.2

5.0

3.5

S.S

2.5

3.2

3.0

2.9

3.5

3.9

3.5

3.4

3.7

4.1

4.1

3.4

2.9

0

0

0

, 0

0

Mean

O.S6

-

-

_

_

_

_

.42

17.0

6.13

2.00

.51

-

Sept.

0

0

0

0

0

0

0

.3

.5

.6

.5

.4

.4

.4

.6

.5

.4

.4

.5

.6

.8

1.1

1.0

.8

1.0

.8

.9

.9

.9

.9

~

Runoff in 

acre-feet

53

-

-

_

..

_

..

13

1,010

377

123

30

-

t Result of discharge measurement.
PEND OREILLE RIVER BASIN 

Boulder Creek at Maxville, Mont.

123

Location.- Water-stage recorder, lat. 46°28'30", long. 1130 14'0011 , in SE-? sec. 4, T. 8 

N., R. 13 W., an eighth of a mile upstream from mouth and three-quarters of a mile 

north of Maxville. Staff gage at same site and datum July 21 to Aug. 11, 1941; prior 

to July 21, 1941, wire-weight gage at site 75 feet upstream and at datum 1.03 feet 

Higher.

Records available.- April 1939 to September 1941 (irrigation seasons only).

Extremes.- Maximum discharge observed during period, 188 second-feet June 5 (gage height, 

1.91 feet); minimum observed, 8.0 second-feet Aug. 12.

1939-41: Maximum discharge observed, 190 second-feet May 12, 1940 (gage height, 

2.20 feet, site and datum then in use); minimum observed, 5.0 second-feet Sept. 8-17, 

1940.

Remarks.- Records good except those above 150 second-feet, which are fair. Gage read once 

daily prior to Aug. 12. Several diversions above station for irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

40

40

23

23

23

23

18

17

17

17

14

14

14

14

14

14

12

12

12

12

16

17

17

14

14

14

14

14

15

15

15

Nov. Dec.

Month

Jan. Feb.

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

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

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

Calendar year ......................

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

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

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

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

May 16-31. ................................

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

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

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

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

Water year ......................

Mar. Apr.

Seoondfoot-dayS

538

_

-

_

_

_

_

1.567

3,095

1,131

475.3

948

-

Hay

_

_

-

-

-

_

_

_

..

-

_

_

-

_

-

Ill

111

127

103

84

76

82

84

90

90

103

111

111

100

86

98

Maximum

40

_

-

_

_

_

_

127

188

61

32

39

-

June

161

170

152

170

188

170

161

144

135

127

119

111

102

96

96

90

69

73

84

96

94

65

53

45

39

37

36

74

69

69

-

Minimum

12

-

-

.

.

-

_

_

76

36

18

8.2

20

-

July

59

58

54

55

49

44

61

53

a4S

44

40

39

36

33

29

26

25

23

22

23

18

18

18

21

21

20

26

48

49

38

33

Aug.

32

30

28

21

16

15

14

13

11

9.0

8.2

9.9

26

20

14

13

11

9.9

9.0

8.6

8.6

8.4

8.6

9.9

8.6

8.6

16

21

24

22

21

Mean

17.4

_

-

_

_

-

H

_

97.9

103

36.5

15.3

31.6

-

Sept.

20

20

22

23

24

27

30

28

2S

33

31

35

36

35

35

32

32

29

35

39

39

36

35

34

35

35

36

35

35

34

~

Runoff in 

acre-feet

1,070

-

_

_

_

_

_

3,110

6,140

2,240

943

1,880

-

a Ho gage-height record; discharge interpolated. 

461678 O-42-9
124 PEND OREILLE RIVER BASIN

Middle Fork of Rock Creek near Philipsburg, Mont.

Location.- Wire-weight gage, lat. 46°11', long. 113°30', in NEi sec. 17, T. 5 N., R. 15 

W., three-quarters of a mile upstream from East Fork, 24 miles upstream from West 

Fork, and 15 miles southwest of Philipsburg.

Records available.- September 1937 to September 1941.

Extremes.- Maximum discharge observed during year, 440 second-feet June 5 (gage height, 

STTTTTeet); minimum observed, 9.4 second-feet Mar. 12 (result of discharge measurement), but may have been less during other periods of Ice effect.

1937-41: Maximum discharge observed, 980 second-feet May 29, 1938 (gage height, 

3.96 feet); minimum observed, 9 second-feet Dec. 12, 1938 (gage height, 0.73 foot), 

but may have been less during periods of Ice effect.

Remarks.- Records fair except those for periods of Ice effect, which are poor, 

read twice dally. A few small diversions above station for Irrigation.

Gage

Discharge, in secondereet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

OR<GO

29

30

31

Oct.

68

58

58

56

55

52

50

43

41

39

38

39

39

39

38

37

36

36

36

36

37

*35

34

38

38

36

39

39

39

37

36

Nov.

39

38

37

37

36

37

33

39

40

37

32

27

26

27

29

I1

J 6

..

1

\ 2V

j

J

-

Dec.

( - 33

t 29

1"

33

32

31

30

29

29

Jan.

29

29

*29

29

28

1

J "

> 26

.

1

J "

..

j

> 22

1

'

Feb.

21

22

23

24

*24

25

25

25

25

24

N

1

> 20

1

>

\I "

\ »

I

18

19

20

-

-

Month

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

Novembe r ........................

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

Calendar year 1940 .................

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

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

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

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

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

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

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

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

Septembe r ............... ...............

Water year 1940-41 .......................

Mar.

24

28

32

34

36

37

28

28

26

24

20 "*16

14

14

17

22

28

34

28

29

24

28

34

29

28

30

32

33

32

35

35

Apr.

37

38

*37

34

37

35

37

34

37

41

48

50

49

48

49

46

46

49

41

49

53

50

52

60

57

60

66

69

31

92

~

Secondfoot-days

1,302

944

974

23,187

791

585

859

1,482

7,185

7,983

3,414

1,851

1,798

29,168

May

95

111

132

142

153

153

142

142

132

132

153

225

332

366

315

283

268

283

253

239

225

225

239

268

283

299

366

332

299

299

299

Maximum

68

40

376

_

25

37

92

366

420

175

90

69

420

June

366

332

315

366

420

383

366

366

348

332

283

268

268

299

268

268

225

225

253

253

199

187

187

175

164

153

153

199

187

175

~

Minimum

34

_

-

_

_

14

34

95

153

78

45

48

14

July

175

164

153

142

142

132

132

132

122

113

111

111

106

104

95

90

92

92

89

111

93

87

81

78

95

95

97

100

106

90

84

Aug.

90

85

78

73

71

65

63

60

59

53

59

66

69

63

55

54

53

54

47

45

46

52

51

50

51

57

64

55

52

53

53

Mean

42.0

31.5

31.4

63.4

25.5

20.9

27.7

49.4

232

266

110

59.7

59.9

79.9

Sept.

51

50

50

48

54

59

58

53

59

63

61

66

65

64

61

63

60

57

59

69

68

69

63

60

60

59

64

60

61

59

"

Runoff in 

acre- feet

2,580

1,870

1,930

45,980

1,570

1,160

1,700

2,940

14,250

15,830

6,770

3,670

3,570

57,840

* Winter discharge measurement made on this day.

Note.- Stage-discharge relation affected by ice Nov. 4-6, Nov. 11 to Mar. 5, Mar. 11-16.
FEND OREILLE RIVER BASIN 

East Fork of Rock Creek near Philipsburg, Mont.

125

Location.- Staff gage, lat. 46°08'10", long. 113°23'10", in NWi Sec. 5, T. 4 N., R. 14 

W., 200 feet upstream from Flint Creek Canal, 300 feet downstream from Rock Creek Dam, 

3 miles upstream from Meadow Creek, and 14 miles southwest of Philipsburg.

Records available.- June 1935 to September 1941.

Extremes.- Maximum discharge observed during year, 78 second-feet (regulated) July 24; 

minimum observed, 2.2 second-feet (regulated) Oct. 1-5.

1935-41: Maximum discharge observed, 269 second-feet June 15, 1935 (gage height, 

3.06 feet, site and datum then In use); minimum observed, 2.0 second-feet (regulated) 

Sept. 30, 1940.

Remarks.- Records poor. Discharge regulated by Rock Creek Reservoir (see p. ir/) . 

ordinarily read twice weekly.

Discharge, in second-feet, water year October 1940 to September 1941

Gage

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

?1

22

?3

24

25

26

?7

?=l

30

31

Oct.

2.2

2.2

2.2

2.2

2.2

2.4

2.7

2.7

2.7

2.7

2.7

3.0

3.0

3.0

3.0

3.0

3.0

3.0

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

Nov.

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

-

Dec.

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

Jan.

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

S.S

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

3.3

Feb.

3.3

3.3

3.

3.

3.

3.

3.

3.

3.

3.

3.

3.

3.

3.

3.

3.

3.

3.7

3.7

3.7

3.7

3.7

3.7

3.8

3.8

3.9

3.9

4.0

_

-

Month

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

Calendar year 1940 ......................

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

Bay........................................

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

Water year 1940-41 ......................

Mar.

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.2

4.3

4.3

4.4

4.4

4.5

4.6

4.6

Apr.

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

4.6

44

. 13

-

Seoondfoot-days

90.8

99.0

102.3

12,150.4

102.3

103.2

129.6

185.8

1,024

1,545

1,679

1,680

860

7,601.0

May

13

13

13

21

21

21

21

21

21

21

49

44

33

22

23

22

22

22

22

30

30

52

52

52

52

52

52

52

52

52

52

Maximum

3.3

3.3

3.3

148

3.3

4.0

4.6

44

58

70

78

75

47

78

June

52

52

52

44

44

44

44

44

42

44

44

44

44

44

44

40

57

57

57

37

47

51

51

58

58

70

70

70

70

70

~

Minimum

2.2

3.3

3.3

2.0

3.3

3.3

4.1

4.S

13

37

40

44

20

2.2

July

70

49

49

49

49

49

40

42

42

42

42

42

42

42

42

42

42

42

42

51

51

57

57

78

76

75

75

75

75

75

75

Aug.

75

75

44

44

44

47

47

47

44

54

57

57

57

57

57

57

57

75

57

57

57

57

57

51

51

51

51

51

51

47

47

Mean

2.93

3.30

3.30

33.2

3.30

3.69

4.18

6.19

33.0

51.5

54.2

54.2

28.7

20.8

Sept.

47

47

47

47

41

41

36

36

36

22

22

22

22

22

22

22

22

22

22

22

22

20

90

20

20

29

29

29

29

"

Runoff in 

acre- feet

180

196

24,090

203

205

257

369

2,030

3,060

3,330

3,330

1,710

15, 070

Note.- Discharge poorly defined by gage readings. Discharge for days of no gage-height record computed on basis of records of released flow at Rock Creek Dam.
126 PEND OREILLE RIVER BASIN

Blackfoot River near Helmville, Mont.

Location.- Water-stage recorder, lat. 46°56', long. 112°57', in NWtSWt sec. 25, T. 14 

N., K. 11 W., 2 miles downstream from Arrastre Creek and 5 miles northeast of 

Helmville. Prior to Oct. 10, 1940, staff gage at same site and datum. Datum of gage 

is 4,301.29 feet above mean sea level, datum of 1929 (levels by Corps of Engineers, 

U. S. Army).

Drainage area.- 481 square miles.

Records available.- September 1940 to September 1941.

Extremes.- Maximum discharge during year, 427 second-feet June 7 (gage height, 2.62 

reet), from rating curve extended above 200 second-feet.; minimum, 70 second-feet 

about May 22 (gage height, 1.27 feet, from recorded range in stage during period of 

faulty recorder operation).

Remarks.- Records good except those for periods of ice effect or no gage-height record, 

which are fair. Several small diversions above station for irrigation. Flow includes 

natural overflow channel on left bank, but does not include unnamed diversions past 

station. For periodic measurements or estimates of these diversions see note below.

Discharge, in second-feet, 1940-41

1940

July 14 f!56 Sept.27 113 Sept.29 115 

Sept. 18 tU3 Sept. 28 113 Sept .30 117

t Result of discharge measurement 

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

113

113

113

113

112

alll

110

110

107

109

107

106

112

118

HE

115

115

113

113

113

113

112

112

110

107

109

107

109

109

109

109

Nov.

109

110

112

110

107

104

106

106

106

b!04

b!02

b!02

b!02

b!02

b!03

b!04

106

104

103

b!02

blOO

b99

b98

b97

b97

99

99

102

107

104

-

Dec.

103

103

103

104

106

104

103

102

102

100

102

b99

b97

b96

b95

>

1

} b95

1

J

100

99

97

99

97

97

97

96

95

96

93

Jan.

b92

b90

b89

*b8S

b88

-.

1

> b85

J

b85

b87

91

92

92

91

91

91

aS9

a87

86

aSS

a92

a93

a93

a93

93

Feb.

92

90

90

*90

90

90

90

90

90

90

90

a90

a90

90

90

b88

b87

b87

b87

88

90

90

S7

97

92

1)92

b88

87

_

-

-

Month

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

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

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

Calendar year ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

90

95

102

110

110

107

104

109

110

*103

97

95

b93

1)90

91

91

92

 a95

a97

a97

a95

93

93

93

93

93

95

93

93

93

*95

Apr.

96

95

95

95

95

93

92

91

91

91

93

96

93

92

91

92

95

92

92

91

90

91

90

90

90

90

90

90

90

S8

-

Secondfoot-days

3,444

3,106

3,060

_

2,746

2,512

3,007

2,760

2,591

8,014

4,174

3,347

3,455

42,216

May

87

S7

87

a90

a94

a93

a90

aS8

as4

SI

eo

79

a83

a90

aSS

a85

83

S3

a82

aSO

a78

a76

75

75

a77

a80

83

83

83

81

86

Maximum

118

112

106

_

9V

110

96

94

415

180

122

122

415

June

122

212

25S

276

312

366

411

415

* 390

370

331

301

287

279

2S7

272

272

279

279

276

255

231

216

200

189

180

178

192

189

1S9

-

Minimum

ioe

_

~

9C

8£

7!

12* lie

9(

104

7£

July

180

175

167

165

162

155

153

146

135

131

129

131

129

124

122

122

120

122

124

131

124

122

118

122

124

122

122

124

127

124

122

Aug.

122

118

115

113

113

112

110

109

112

113

110

112

112

110

106

106

106

104

104

103

103

100

99

102

100

102

104

107

107

107

106

Mean

111

104

9S .7

_

88 * 6

97.0 

92.0

83* 6

26V

135

108

115

116

Sept.

104

106

107

107

109

110

113

113

113

115

117

122

120

120

122

120

118

118

120

120

120

112

112

115

117

115

117

118

117

118

Runoff in 

acre-feet

6,830

6,160

6,070

_

5,450

4,980

5,960 

5 470

5*140

15, 900

6*640

6,850

83.730

a Ho gage-height record; discharge computed on basis of recorded range of stage and records for 

station near Ovando.

b Stage-discharge relation affected by ice.

Note.- The flow in small diversions above station, which carry water around gage, was measured as 

4.3 second-feet May 23; 49.5 second-feet June 28; 9 second-feet (estimated) Aug. 12; and 9.4 secondfeet Sept. 10.
PEND OREILLE RIVER BASIN 127

Blackfoot River near Ovando, Mont.

Location.- Water-stage recorder, lat. 47°01', long. 113°07', in SEiNWi sec. 34, T. 15

 N., R. 13 W., on left bank, a quarter of a mile upstream from Monture Creek and 5 

miles west of Ovando. Prior to Oct. 12, 1940, staff gage at same site and datum. 

Datum of gage is 3,917.27 feet above mean sea level, datum of 1929 (Corps of Engineers, U. S. Army, bench mark).

Drainage area.- 1,280 square niles.

Records available.- September 1940 to September 1941.

Extremes.- j.a4U-4i: Maximum discharge during water year, 1,360 second-feet June 2

(gage height, 3.27 feet), from rating curve extended above 530 second-feet; minimum, 

167 second-feet Feb. 28 (gage height, 1.60 feet), but may have been less during 

periods of ice effect.

Floodmarks indicate stage of 10 feet reached in recent years.

Remarks.- Records good except those for periods of ice effect, which are poor.

Discharge, in second-feet, 1940-41 

1940

Day

1 

2 

3 

4 

5

Sept.

272 

276 

290

Day

6 

7 

8 

9 

10

Sept.

290 

282 

279 

276 

272

Day

11 

12 

13 

14 

15

Sept.

269 

269 

272 

290 

a290

Day

16 

17 

18 

19 

20

Sept.

290 

290 

293 

301 

297

Day

21 

22 

23 

24 

25

Sept.

293 

a292 

290 

290 

286

Day

26 

27 

2S 

29 

30 

31

Sept.

290 

290 

282 

a2S6 

a289

a No gage-height record; discharge interpolated.

Hote.- The discharge on July 14, 1940 was measured as 390 second-feet.

Day

1

2

3

4

5

6

7

8

9

10

11

12

13 

14

15

16

17 

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

293

290

290

290

290

286

2S6

2S6

2S6

a2Sl

a277

272 

279 

2S2

286

282

279 

279

279

276

276

276

276

279

279

282

279

276

279

279

276

NOV.

276

286

286

282

276

269

269

272

272

256

b240

b253 

b260 

b266

b282

b282

b269 

276

b240

b247

b263

263

b269

b272

269

260

266

263

272

276

-

Dec.

272

266

266

269

279

266

266

266

b260

b250

x

I b205

1

 L

\ b230

I

'

b260

b260

b260

b255

250

240

240

240

240

b235

b230

Jan.

b225

b215

b210

«b205

b205

..

1

> b205

i

-.

> b210

'

b220

b230

b230

229

227

222

222

224

222

224

211

b205

Feb.

b205

b205

b210

*b215

b220

b225

b225

b225

b225

222

217

220 

217 

220

215

b206

b215 

b222

b234

222

211

213

211

211

206

211

206

213

_

_

-

liar.

217

222

250

320

360

338

329

360

446

*398

293

253 

229 

240

234

220

253 

301

324

290

263

250

253

250

247

247

242

237

237

240

240

Apr.

240

232

229

227

227

227

222

217

215

213

213

222 

224 

215

213

211

217 

217

217

215

213

215

215

215

220

224

222

229

242

260

-

May

297

346

386

403

414

392

355

342

324

312

312

351 

532 

760

674

571

532 

532

501

460

420

392

364

360

375

433

486

509

473

466

532

June

1,010

1,320

1,210

1,210

1,250

1,230

1,160

1,160

1,100

1,010

922

826 

782 

826

793

738

706 

706

717

717

684

625

580

532

473

453

453

524

571

562

July

532

509

486

479

473

460

433

409

403

381

375

381 

381 

370

355

346

329 

324

320

329

237

309

305

309

320

312

309

309

312

312

309

Aug.

305

305

293

282

276

272

269

266

256

256

256

253 

253 

250

247

247

247 

242

240

240

237

237

234

234

234

234

240

247

245

245

247

Sept.

247

250

260

256

253

253

256

260

256

260

263

269 

272 

269

269

269

266 

263

266

266

266

263

253

266

266

263

266

263

263

260

-

« Winter discharge measurement made on this day. 

a No gage-height record; discharge Interpolated, 

b Stage-discharge relation affected by ice.

Monthly discharge, in second-feet, 1940-41

Month

September 3-30, 1940. .............. .

October 1940 ........ . . .

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

Calendar year 1941 ..........

January 1941 ........

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

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

MBIT

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

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

Water year 1940-41 .................. ...

Second 

foot-days

7,986

8,726 

8,032 

7,545

-

6,681 

6,047 

8,583 

6,668 

13,606 

24,850 

11,501 

7,889 

7,852

117,980

Maximum

301

293 

286 

279

-

230 

234 

446 

260 

760 

1,320 

532 

305 

272

1,320

Minimum

269

281 

268 

243

-

205 

217 

111 

297 

453 

305 

234 

247

-

Mean

285

281 

26S 

243

-

216 

216 

277 

222 

439 

828 

371 

254 

262

323

Runoff in 

acre-feet

15,840

17,310 

15,930 

14,970

-

13,250 

11,990 

17,020 

13,230 

26,990 

49,290 

22,810 

15,650 

15,570

234,000
128 PEND OREILLE RIVER BASIN

Blackfoot River near Bonner, Mont.

Location.- Staff gage, lat. 46°54', long. 113°47', in SWiSWi sec. 8, T. 13 N., R. 17 W., 

4 miles northeast of Bonner, 6 miles downstream from Union Creek, and 6 miles upstream from mouth.

Drainage area.- 2,280 square miles.

Records available.- October 1939 to September 1941. July 1898 to October 1905 at mouth, 

hair a mile west of Bonner; records not equivalent.

Extremes.- Maximum discharge observed during year, 1,940 second-feet June 2 (gage height, 

3.27 feet); minimum observed, 252 second-feet Dec. 12 (gage height, 0.47 foot).

1939-41: Maximum discharge observed, 3,800 second-feet May 12, 1940 (gage height, 

4.94 feet); minimum daily, 220 second-feet Jan. 19, 1940; minimum gage height observed, 

that of Dec. 12, 1940.

Remarks.- Records good except those for periods of Ice effect, which are fair, 

diversions above station for irrigation. Gage read once daily.

Many

Rating table, water year 1940-41, except periods of Ice effect (gage height, In feet, and 

discharge, in second-feet)

0.4 240 1.0 440

.5 265 1.5 690

.7 330 2.0 990

2.5 1,320

3.0 1,690

3.3 1,940

Discharge. In second-feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

420

420

420

420

400

420

420

400

400

400

400

400

420

420

420

420

420

420

400

400

400

400

400

400

400

420

420

420

420

420

420

Nov.

4 2O

420

420

420

420

420

a420

a420

420

400

a356

*312

360

400

a420

440

a 451

462

462

462

450

440

420

425

430

435

440

450

455

460

-

Dec.

462

462

462

*462

420

440

420

440

440

420

382

252

260

265

285

320

340

370

395

410

420

430

435

440

440

435

430

410

390

370

335

Jan.

310

300

305

325

350

360

360

355

340

385

310

295

300

325

370

390

385

385

390

*390

395

395

400

395

390

385

375

365

355

350

350

Feb.

365

390

400

400

395

395

405

415

420

415

410

400

390

365

335

320

315

330

350

365

375

375

370

355

330

315

*310

310

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

335

365

400

485

560

560

a585

610

775

636

535

462

400

a420

440

400

420

510

585

535

486

462

485

462

485

462

462

462

462

485

485

Apr.

Secondfoot-days

12 ,760

12,710

12 S42

326,699

11,025

10,320

15,214

16,112

33,980

37,070

18,875

12,092

11,241

203 ,641

485

462

485

485

485

485

485

485

485

485

510

535

535

535

535

535

535

535

535

535

535

535

535

560

585

585

610

635

662

718

May

865

865

1,060

1,120

1,120

1,060

1,060

990

1,060

1,060

865

926

1,180

,460

,460

,390

,320

,250

1,250

1,180

1,120

1,060

990

925

865

1,060

1,120

1,120

1,060

1,060

1,060

Maximum

420

462

462

3,800

400

420

775

718

1,460

1,940

865

485

400

1,940

June

1,530

1,940

1,770

1,770

1,770

1,690

1,610

1,610

1,530

1,390

1,320

1,250

1,180

1,180

1,180

1,120

1,120

1,120

1,060

1,120

990

990

865

865

865

745

775

925

925

865

Minimum

40C

31£

25!

22C

29E

31C

33E

46£

86E

74E

48E

34E

34E

25£

July

865

805

775

745

775

745

718

690

662

635

635

635

635

635

585

585

560

535

535

535

635

510

485

510

510

510

485

510

535

510

485

Aug.

a

a

Mean

412

424

395

893

356

369

491

537

1,096

1,236

609

1 390

! 375

> 558

485

485

462

462

440

420

420

400

400

400

400

400

382

382

382

382

382

365

365

365

365

365

365

365

365

348

348

348

348

348

348

Sept.

348

348

365

365

365

348

348

365

365

365

365

382

382

382

382

382

382

382

382

382

382

382

382

382

382

400

382

400

382

382

-

Runoff in 

acre-feet

25 ,310

25,210

24,280

648,100

21,870

20,470

30,180

31,960

67 ,400

73,530

37,440

23,980

22,300

403,900

* Winter discharge measurement made on this day. 

a Ho gage-height record; discharge interpolated.

Note.- Stage-discharge relation affected by Ice Nov. 12-14, 21, 22, 24-26, 28-30, Dec, 13, Dec. 15 

to Mar. 2.
PEND OREILLE RIVER BASIN 

Nevada Creek above reservoir, near Finn, Mont.

129

Location.- Wire-weight gage,.lat. 46°47', long. 112°46', in NEi sec. 29. T. 12 N-, R. 9 

W., iJ miles upstream from Buffalo Creek and 3 miles west of Finn.

Drainage area.- 128 square miles.

Records available.- April .1939 to September 1941. May 1934 to February 1939 at site 3 

miles downstream.

Extremes.- Maximum discharge observed during year, 150 second-feet Mar. 2 (gage height, 

3.33 feet, affected by ice); minimum observed, 2.5 second-feet July 23.

1939-41: Maximum discharge observed, 320 second-feet Mar. 21, 1940 (gage height, 

3.68 feet), from rating curve extended above 60 second-feet; minimum observed, 2.5 

second-feet Sept. 12, 1940, July 23, 1941.

Remarks.- Records fair except those for periods of ice effect or no gage-height record, 

wnlcn are poor. Gage read once daily. Several small diversions above station for 

irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

4.0

3.6

3.8

3.6

3.6

3.4*

4.0

4.0

3.8

4.2

4.4

4.4

7.3

5.8

5.5

5.8

5.5

5.6

5.8

5.8

7.3

7.3

6.9

5.8

10

14

11

8.0

6.9

8.0

8.0

Nov.

10

13

10

8.0

7.6

7.3

6.6

5.8

5.1

5.1

5.1

5.0

5.0

6.0

7.0

\

1

> 6.5

f

I

.

1

r 5

f

)

\r

Dec.

» 6

. 6

X

1

f ^

1 '1-/

Jan.

6.0

5.5

5.5

5.0

5.0

5.0

5.0

5.0

5.0

5.0

' 1 5

Feb.

5

5

5

5

5

5

6

6

6

6

7

> 10

-

-

"

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

50

150

100

90

60

75

70

65

25

12

*13

a 13

12

12

18

48

27

19

16

15

14

15

16

16

14

17

16

18

16

16

Apr.

Second 

foot-days

187.3

194.1

161

8,264.1

157.0

204

1,079

300.3

521.0

846.9

305.7

205.9

242.4

4,404,6

18

17

16

14

15

14

12

10

10

9.5

13

12

9.5

8.0

8.0

7.6

6.9

7.3

6.9

6.6

6.9

8.5

7.3

6.0

8.5

a8.3

aS.l

a6.0

a7.8

7.6

-

May

9.5

12

16

21

29

27

22

21

20

18

18

17

a20

23

23

20

22

20

18

14

10

8.5

8.5

6.5

10

10

16

16

15

14

14

Maximum

14

13

320

_

_

150

18

29

73

37

11

14

150

June

73

d72

72

48

48

50

46

46

41

29

26

25

22 .

20

20

15

17

22

26

19

16

11

8.5

7.3

8.0

7.3

5.8

15

15

14

~

Minimum

3.4

July

12

12

8.5

9.5

12

9.5

8.5

7.6

7.6

6.9

7.6

10

10

9.5

8.5

8.5

8.5

7.6

6.9

4.2

3.4

2.9

2.5

4.8

6.2

8.5

11

25

37

15

14

Aug.

11

10

9.0

8.0

7.6

7.6

7.3

6.9

6.9

6.6

6.2

6.9

8.5

7.6

6.9

6.2

6.2

5.5

5.5

4.8

4.4

4.2

5.5

5.1

5.1

5.6

6.6

5.8

6.2

6.2

5.8

Sept.

4.8

4.8

5.5

a5.6

a5.7

5.6

a6.2

a6.6

a6.9

7.3

a7.6

8.0

aS.O

a8.0

8.0

a7.3

6.6

6.2

8.0

11

9.0

all

a!2

14

9.5

10

12

alO

8.5

a8.5

~

Mnan Runoff in Uean acre-feet

6.04 372

6.47 385

5.19 319

2.5 22.6 16,430

5.06 311

5 7.29 405

11 34.8 2,140

6.6 1O.O 596

8.E

5.£

2.E

4.Z 4.e

2.E

16.8 1,030

28.2 1,680

9.86 606

6.64 408

8.08 481

12.1 6,730

» Winter discharge measurement made on this day.

a No gage-height record; discharge interpolated.

d Doubtful gage-height record; discharge Interpolated.

Note.- Stage-discharge relation affected by ice Nov. 12 to Mar. 11.
130 PEND OREILLE RIVER BASIN

West Fork of Bitter-root River near Conner, Mont.

Location.- Water-stage recorder, lat. 45°44', long. 114°17', in NEiMWi sec. 26, T. IS., 

R. zz W., half a mile below West Fork Dam, 6 miles upstream from Nez Perce Creek, and 

16 miles southwest of Conner. Prior to May 29, staff gage at same site and datum.

Records available.- April to September 1941.

Extremes.- Maximum discharge observed during period, 820 second-feet May 28 (gage height, 

3.47 feet); minimum observed, 1.8 second-feet Apr. 20.

Remarks.- Records good except those for periods of no gage-height record, which are poor, 

now regulated by West Fork of Bitterroot Reservoir (see p. 117). Many diversions 

above station for irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17in

19

20

21

?2

23

24

25

26

?7

2fl

29

30

31

Oct. Nov. Dec.

Month

Jan. Feb.

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

Calendar year ......................

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

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

Apri 

Hay

July 

Augu 

Sept

st .....................................

ember ....... ..........................

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

Mar. Apr.

_

_

_

_

-

_

_

_

_

-

_

_

.

_

-

_

_

_

.

2.0

2.2

2.0

2.0

2.0

2.2

2.0

2.2

2.2

2.2

2.2

-

Secondfoot-days

_

_

.

23.2 

10,349.8

12,932

5,437 

2,940 

11,162

-

May

2.2

2.2

a2.2

2.2

2.2

2.2

2.2

2.2

2.2

220

a470

450

493

548

736

712

521

a500

571

484

253

542

593

199

a300

a400

a500

674

670

3S3

111

Maximum

.

-

.

2.2 

736

571

294 

151 

495

-

June

406

470

460

4S5

505

500

500

571

566

550

530

505

505

530

485

445

425

406

430

430

3S8

a364

a341

a318

294

286

282

306

335

314

~

Minimum

_

- -

_

2.C 

2.2

282

114 

76 

109

-

July

294

2S6

282

270

255

236

236

224

202

192

185

185

174

171

165

159

146

143

137

137

132

122

117

114

114

124

127

132

132

127

117

Aug.

114

114

105

98

93

93

91

87

89

93

93

105

102

98

91

S9

85

80

78

76

SO

83

S9

96

98

98

98

93

89

91

151

Mean

.

-

-

2.11 

334

431

175 

94.8 

372

-

Sept.

415

495

490

490

485

4SO

480

475

277

112

109

269

370

365

365

365

361

361

361

392

475

475

470

465

460

316

247

247

247

243

~

Runoff in 

acre-fest

_

-

-

46 

20,530

25,650

10,780 

5,830 

22, 140

84,980

a No gage-height record; 

operation.

discharge interpolated or computed on basis of records of reservoir
PEND OREILLE RIVER BASIN 131

Bitterroot River near Darby, Mont.

Location.- Water-stage recorder, lat. 45°59', long. 114°09', in NEi sec. 36, T. 3 N., R. 

 21 W., just below bridge on U. S. Highway 93, a quarter of a mile downstream from 

Chaffin Creek and 4 miles southeast of Darby.

Drainage area.- 1,050 square miles.

Records available.- April 1937 to September 1941.

Extremes.- Maximum discharge during .year, 2,420 second-feet May 13 (gage height, 4.18 

reet); minimum, 77 second-feet Nov. 13 (gage height, 1.17 feet).

1937-41: Maximum discharge observed, 5,480 second-feet May 29, 1938 (gage height, 

6.51 feet); minimum observed, 71 second-feet Feb. 9, 1939 (stage-discharge relation 

affected by ice).

Remarks.- Records excellent except those for periods of ice effect, which are fair. Flow 

partly regulated by West Fork of Bitterroot Reservoir (see p. 117). Many diversions 

above station for irrigation.

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

831

S06

806

797

756

748

562

3S4

453

772

421

307

393

2S8

279

269

265

252

243

247

247

239

235

236

226

239

247

247

235

235

235

Nov.

235

243

247

252

1S3

161

168

168

164

155

136

104

94

192

256

265

269

459

279

*231

257

211

177

20S

226

211

208

20S

274

2S4

Dec.

243

243

243

243

243

252

235

231

226

204

152

*100

90

95

110

125

140

205

226

231

231

231

222

218

211

208

211

204

168

144

161

Jan.

147

120

105

105

135

186

194

200

183

171

130

115

135

160

183

ISO

174

1S6

190

190

1S6

183

180

ISO

180

180

150

125

120

*100

110

Feb.

110

125

135

115

105

120

140

148

151

147

147

147

131

115

94

100

104

106

117

131

122

131

131

131

129

111

117

*136

_

-

Mar.

152

180

164

149

147

144

139

144

147

134

117

100

104

104

122

149

147

164

16S

164

164

164

168

164

161

171

186

204

218

293

344

Apr.

349

3S4

426

414

37S

355

323

307

31S

328

344

344

334

318

323

318

318

307

28S

293

293

298

334

396

440

452

499

569

662

797

-

May

973

1,040

1,080

1,090

1,030

901

7S8

716

67S

692

1,260

1,730

2,300

2,300

2,120

2,000

1,940

1,660

1,440

1,280

1,100

1,360

1,710

1,600

1,440

1,710

1,880

1,760

1,760

1,660

1,210

June

1,760

1,760

1,710

1,820

1,880

1.S20

1.S20

2,120

1,940

1,710

1,660

1,600

1,540

1,660

1,490

1,380

1,280

1,260

1,540

1,540

1,270

1,150

1,070

964

857

S02

795

849

905

673

~

July

S41

S49

833

865

788

729

729

680

610

552

519

519

493

512

474

444

438

438

414

402

378

334

307

307

312

334

328

360

420

384

344

Aug.

339

328

302

279

265

247

231

214

211

214

222

231

239

231

208

a202

a!96

a!90

a!84

h!77

177

183

190

208

211

226

243

247

235

239

239

Sept.

444

624

624

631

687

758

758

750

666

396

384

444

673

659

666

659

673

659

666

708

810

795

765

750

729

645

512

506

500

493

"

Month 

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

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

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

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

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

Water year 1940-41 ......................

Secondfoot-days

12,390

6,525

6,046

185,259

4,883

3,496

5,076

11,509

44,208

42,825

15,937

7.108

19,034

179, 037

Maximum

831

459

252

3,010

200

151

344

797

2,300

2,120

865

339

810

2,300

Minimum

226

94

90

90

100

94

100

288

678

795

307

177

3S4

90

Mean

400

218

195

506

158

125

164

384

1,426

1,428

514

229

634

491

Runoff in 

acre-feet

24,580

12,940

11,990

367, 400

9,690

6,930

10,070

22,830

87, 690

84,940

31,610

14,100

37,750

355, 100

* Winter discharge measurement made on this day. 

a No gage-height record; discharge interpolated, 

h Computed from staff-gage reading.

Note.- Stage-discharge relation affected by Ice Nov. 22-24, Dec. 11-18, Dec. 30 to Jan. 5, Jan. 

10-14, Jan. 27 to Feb. 9, Feb. 13-21, 26, 27, Mar. 11-15.
132 PEND OREILLE RIVER BASIN

East Fork of Bitterroot River at Conner, Mont.

Location.- Wire-weight gage, lat. 45°56', long. 114°08', in SEi sec. 7, T. 2 N., R. 20 

W., below highway bridge at Conner, about half a mile upstream from confluence with 

West Fork.

Drainage area.- 404 square miles.

Records available.- April 1937 to September 1941. September 1910 to September 1916, at 

site Zt miles upstream.

Extremes.- Maximum discharge observed during year, 715 second-feet June 5 (gage height, 

 3.83 feet); minimum observed, 12.3 second-feet Dec. 12 (result of discharge measure1937-41: Maximum discharge observed, 1,810 second-feet my 29, 1938; minimum 

observed, 1.4 second-feet Aug. 17, 1937.

Remarks.- Records fair except those for periods of ice effect, which are poor. Gage 

read twice daily. Several diversions above station for irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

5

6

11

16

21

23

26

27

29

30

31

Oct.

136

116

114

127

108

96

91

90

84

84

80

78

76

74

72

70

68

70

68

6S

66

69 

72

70

69

70

72

76

72

70

74

Nov.

72

69

75

74

70

78

72

75

76

68

6S

45

30

40

55

65

70

74

70

*33

40

50 

25

35

70

S4

75

63

SO

95

Dec .

9S

96

7S

70

74

76

SO

72

72

70

35

*15

SO

25

35

V

1

> 55

'

.

> 90

J

ss

75

61

60

55

45

40

Jan.

["

70

50

75

7S

70

68

62

54

46

35

#31

35

Feb.

45

50

55

45

30

35

40

55

66

6S

65

69

60

50

25

35

40

50

60

65

70

66 

65

6S

70

55

63

*66

_

-

Month

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

Calendar year 1940 ......................

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

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

Water year 1940-41 ... ..................

Mar.

95

112

8S

74

70

6S

65

61

58

54

50

40

30

36

40

37

39

40

41

46

50

52 

54

56

57

61

65

69

74

81

88

Apr.

9S

96

102

104

108

102

SS

88

91

SS

102

110

106

91

98

9S

93

93

S3

95

9S

9S 

98

100

110

US

120

139

151

175

Secondfoot-days

1,975

43,617.7

1,778

10,653

3,634

45,151

May

195

226

312

348

348

330

295

260

243

210

226

295

425

490

425

425

348

34S

34S

330

330

330 

330

34S

385

 34S

535

445

385

405

3S5

Maximum

9S

715

535

692

243

96

692

June

558

558

5SO

625

692

625

602

625

55S

490

468

425

3S5

405

3S5

348

330

330

d34S

365

330

295 

278

226

184

164

181

226

243

226

-

Minimum

15

5.5

S3

195

164

61

21

15

July

243

226

226

210

1S9

1S1

175

170

141

106

96

98

102

106

96

90

90

90

90

90

SI

72 

63

61

6S

72

74

76

118

96

SS

Aug.

96

S4

66

68

60

56

50

42

40

37

37

35

32

34

28

27

27

24

21

SS

25

' 25 

30

36

33

45

60

63

63

6S

6S

Mean

3

62 9

63.7

 119

57.4

54.7

344

119

45.3

124

Sept.

65

61

58

60

70

79

86

SS

80

93

91

112

121

108

101

97

93

S6

93

101

99

95 

93

S9

86

S6

93

91

S9

S6

-

Runoff in 

acre-feet

3,920

86,510

3,530

3,040

3,670

6,230

21,130

23,910

7,310

2,780

5,240

39,560

Winter discharge measurement made on this day. 

d Doubtful gage-height record; discharge interpolated, 

Mote.- Stage-discharge relation affected by ice Nov. 12-17, 

Jan. 28 to Feb. 8, Feb. 13-21, 26, Mar. 12, 13.

20-25, Dec. 11-24, Dec. 29 to Jan. 22,
PEND OREILLE RIVER BASIN 133

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 1$ miles upstream from mouth and 2-| miles north of Hamilton.

Drainage area.- 29.2 square miles.

Records available.- April 1938 to September 1941.

Extremes.- Maximum discharge during year, 275 second-feet May 13 (gage height, 2.66 

feet, from graph based on gage readings); minimum observed, 1.5 second-feet various 

days in July and August.

1938-41: Maximum discharge observed, 606 second-feet May 2S, 29, 1938 (gage 

height, 3.45 feet); minimum observed, 0.8 second-foot various days in July and 

August 1940.

Remarks.- Records good except those for periods of ice effect or backwater from beaver

dam. which are fair. Gage read once daily. Many diversions above station for

irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

22

14

25

15

11

9.4

6.6

5.3

4.3

2.8

2.4

2.4

6.6

6.0

5.3

4.8

4.3

4,3

3.8

3.3

5.3

6.6

6.0

6.0

6.6

7.9

7.2

7.9

9.4

7.9

7.2

Nov.

7.2

6.6

9.4

13

13

N

1

> c!2 -

'

clO

clO

ClO

clO

clO

*10

10

10

b9

b9

8.8

8.2

7.5

5.5

5.0

4.6

-

Dec.

4.3

4.1

4.5

4.8

4.8

5.2

4.6

4.3

4.3

4.3

*4.3

b4

M

b4

b4

}-

b5.5

5.0

5.0

5.5

5.0

5.0

5.0

5.0

5.0

5.0

5.0

Jan.

Mr5

.,

1

> t>5.0

>

..

1

> M.5

1

i

.

1

> b4.5

1

I

04.5

4.6

4.6

4.6

6.5

6.5

6.5.

6.5

6.5

*b7.0

b6. 5

Feb.

6.2

6.2

b6.0

b6.0

b6.0

b6.5

06.5

6.8

7.2

8.5

8.6

9.2

8.5

7.8

b7.5

b7.0

b7.0

b7.5

b7.5

b7.5

7.8

8.5

8.5

7.8

8.5

7.8

7.8

*8.2

_

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

7.8

8.5

7.2

6.S

6.8

5.8

6.0

6.5

6.5

6.0

4.6

M.O

M.O

bS.O

6.8

7.2

7.0

8.8

8.2

8.2

8.2

8.5

8.5

8.5

7.2

10

11

12

12

21

20

Apr.

*24

30

30

26

23

21

20

20

20

23

30

26

23

20

24

21

20

19

17

20

21

23

24

30

37

30

37

49

79

107

May

113

126

110

104

82

69

72

69

32

27

52

57

212

172

115

90

95

98

64

50

52

57

55

76

139

118

170

137

77

107

95

forays 

236.6 25

286.8

141.5 5.5

10,865.6 350

156.8 7.0

208.8 9.2

258.6 21

894 107

2,892 212

2,074 180

100.9 12

54.8 2.0

491.1 30

7,795.9 212

June

180

152

107

101

101

S7

81

124

106

72

72

67

59

62

45

33

26

62

120

95

69

58

46

45

29

21

12

14

16

12

-

Minimum

2.'

July

9.2

12

7.5

7.0

6.0

5.5

2.3

2.3

2.0

2.0

2.3

2.3

2.3

2.0

C2.0

.

1

> cl.5

I

1

.

1

> C2.0

J

v

1

> c3.0 1

I

1.7

Aug.

1.5

1.5

1.5

1.7

1.7

1.7

1.7

1.5

1.5

1.7

1.9

1.9

1.9

1.7

1.7

1.7

1.7

1.7

1.7

1.7

1.7

1.9

2.0

2.0

1.8

1.8

2.0

2.0 2.'0

2.0

2.0

Sept.

2.0

2.0

2.0

2.6

9.5

13

14

13

12

12

11

17

24

26

29

30

30

27

29

27

26

24

13

12

12

15

16

15

14

12

-

,. Runoff in 

Mean acre-feet

7 . RS 4.RO

4.6 9^56 569

4-BB HAT

.£ 29.7 .... __,._, 21.560

5.06 311

6.0 7.46 414

4.0 8.34 513

17 29.8 1,770

27 93.3 1 5,740

12 69.1 4,110

3.25 200

1.5 1.77 109

2.C

-

16.4 974

21.4 15,460

* Winter discharge measurement made on this day.

b Stage-discharge relation affected by Ice.

c Backwater from beaver dam; discharge computed on basis of weather records and observer's notes.
134 PEND OREILLE RIVER BASIN

Willow Creek at Anfinson Ranch, near Corvallis, Mont.

Location.- Staff gage, lat. 46°18', long. 114°01', In NWi sec. 7, T. 6 N., R. 19 W., at 

Anfinson Ranch, 5 miles southeast of Corvallis.

Drainage area.- 23.2 square miles.

Records available.- April 1938 to September 1941. April 1920 to May 19E4 at site about 

1 mile upstream; records not equivalent.

Extremes.- Maximum discharge observed during year, 16 second-feet June 1-4; minimum 

observed, 0.3 second-foot May 11-24, Aug. "5-11, 17-21.

1938-41: Maximum discharge observed, 73 second-feet June 19, 1938; minimum observed, 

0.1 second-foot Sept. 11, 1938, Aug. 13 to Sept. 13, 1939.

Remarks.- Records fair. Gage read once dally. Many diversions above station for Irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

id

3

4

b

6

V

8

9

10

11

12

13

14

ib

16

17

18

19

20

21

22

23

24

2b

26

2V

28

29

30

31

Oct.

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

Vo

1.0

1.0

1.0

1.0

1.0

i.O

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

Nov.

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

3.0

2.0

2.0

2.0

2.6

3.0

*3.0

3.5

S.S

3.3

3.2

3.5

3.9

4.3

4.8

5.1

5.1

5.1

-

Dec.

5.1

5.1

5.1

5.1

4.8

4.6

4.6

4.8

3.9

3.8

*2.8

bS.8

1)2. 8

b2.5

b3.5

b2.5

b3.5

bS.O

b3.5

4.6

4.3

3.9

3.0

2.8

3.0

3.0

3.0

3.0

2.8

3.9

3.1

Month

Jan.

3.2

3.2

b3.2

b3.2

b3.3

3.7

3.7

3.5

3.5

3.2

3.2

3.2

3.2

3.0

2.8

2.8

2.8

2.8

2.8

2.8

2.S

2.8

2.8

3.8

2.8

2.8

2.8

3.8

*3.6

2.8

3.7

Feb.

3.7

3.7

3.7

3.7

3.7

3.7

3.7

3.7

3.7

3.7

3.9

4.1

4.3

4.3

4.3

4.3

4.3

4.1

4.1

3.9

3.9

3.7

3.7

3.7

3.7

3.7

3.7

3.9

a.

_

-

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

Calendar year 1940 ......................

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

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

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

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

Water year 1940-41 . ... ...............

Mar.

4.1

4.1

4.1

2.8

2.8

2.8

2.8

2.8

2.8

2.8

3.8

2.8

2.8

2.8

2.8

3.8

3.8

2.8

2.8

2.8

3.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

1.5

Apr.

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.5

1.8

2.2

2.2

2.2

2.2

3.4

3.4

2.6

2.6

2.0

3.0

2.0

2.0

Secondfoot-days

110.0

1,323.1

33.6

1,095.3

May

2.0

2.2

2.2

3.2

2.2

2.2

2.2

2.2

1.0

1.0

.3

.3

.3

.3

.3

.3

.3

.3

.3

.3

.3

.3

.3

.5

.7

1.2

1.5

2.0

2.8

3.2

Maximum

5.1

16

1.8

16

June

16

16

16

16

15

14

14

14

14

13

13

12

11

10

8.5

8.5

10

12

14

14

13

12

10

8.5

7.0

5.9

7.9

9.1

9.7

9.7

-

Minimum

2.5

.2

.5

.3

July

6.5

5.6

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

5.1

4.3

4.3

3.7

3.7

3.5

3.3

2.8

2.4

3.0

1.8

1.8

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

Aug.

1.0

1.0

1.0

1.0

.3

.3

.3

.3

.3

.3

.3

.9

.9

.9

.9

.9

.3

.3

.3

.3

.3

.4

.4

.4

.4

.5

.5

.5

.5

.5

.5

Mean

3.55

3.62

.79

3.00

Sept.

0.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.5

.6

.6

.6

.6

.6

.6

.6

.6

1.8

1.8

1.8

1.8

1.8

1.8

-

Runoff in 

acre-feet

218

2,620

47

2,170

« Winter discharge measurement made on this day. 

b Stage-discharge relation affected by ice.
PEND OREILLE RIVER BASIN 135

Bear Creek near Victor, Mont.

Location^- Water-stage recorder lat. 46°23', long. 114°13', in NEi sec. 9, T. 7 N., R. 

21 W., 5 miles southwest of Victor. Prior to Aug. 27, 1941, staff gage at same site 

and datum.

Drainage area.- 26.6 square miles.

Records available.- April 1938 to September 1941.

Extremes.-Maximum discharge observed during year, 578 second-feet May 13 (gage height, 

2.40 feet); minimum observed, 4.8 second-feet Aug. 20.

1938-41: Maximum discharge observed, 865 second-feet Apr.18, 1938 (gage height, 

3.45 feet, from graph based on observer's readings); minimum observed, 1.1 secondfeet Aug. 23, Sept. 9-12, 1940.

Remarks.- Records good except those for periods of ice' effect or alte^tion to control, 

wnicti are fair. Staff gage read twice daily, October 1 to Aug. 26. No diversion or 

regulation above gage.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

24

24

43

32

23

21

18

17

15

13

12

11

15

15

13

13

11

11

10

9.8

9.4

9.4

9.8

11

14

17

18

17

15

14

16

Nov.

16

18

17

16

16

15

15

15

16

14

13

13

12

14

16

15

19

19

16

16

17

16

14

15

15

13

12

11

19

18

-

Dec.

17

16

16

18

18

18

16

17

16

15

10

9

9

9

S

8

8

10

14

17

16

14

9.8

12

13

11

11

11

11

11

11

Jan.

10

10

9

9

10

11

11

11

e.7

9.8

9.8

10

10

10

10

9.8

9.4

9.7

9.4

10

9.4

9.4

8.7

8.7

8.7

8.7

8.7

8.7

8.4

11

9.8

Month

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

Calendar year 1940 .........

Bay ...........................

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

September ............... \ .....

Water year 1940-41 ..........

Feb.

9.4

8.7

8.7

8.7

8.7

9.8

9.8

9.8

9.4

9.8

9.8

9.8

9.8

8.7

9.0

10

10

9,8

9.0

9.4

8.7

8.7

9.0

9.0

8.0

8.4

9.4

9.0

_

-

-

Secondfoot-days

399.8

18,709.9

296 8

1,319.5

15,632.9

Mar.

10

10

12

10

11

11

12

12

12

12,

11

10

10

12

13

14

12

16

16

17

16

16

16

16

15

17

20

29

87

37

35

Maximum

18

546

69

482

Apr.

39

56

60

50

45

37

35

41

39

43

50

45

42

34

38

32

35

32

36

32

32

30

39

59

65

60

88

101

130

166

-

May

209

224

198

179

150

120

88

8&

72

75

110

276

482

266

172

147

209

185

127

112

114

152

188

221

318

240

185

139

130

152

161

Minimum

8

1.1

5.8

4.8

June

253

205

166

152

147

134

132

188

130

116

116

118

120

103

91

82

82

132

125

164

114

95

84

78

68

62

57

70

90

80

-

Mean

12.9

51.1

44.0

43.8

July

78

70

68

62

75

62

55

48

43

3S

35

35

34

29

26

28

22

20

18

18

17

16

15

18

16

20

16

18

18

17

15

Per 

square 

mile

.465

1.92 '

1 999

1.65

1.61

Aug.

14

1£

1£i:

9.4

S.4

£

'

1

.0

.8

.0

7.8

7.2

er

e'

el

.2

1.1

3.0

e7.2

e(

e

e

e.

5.9

3.9

5.5

5.3

e4.B

e5.5

"

3.5

3.1 '.7

6.6

7.4

3.2 '.4

5.6

5.4

5.6

Sept.

6.1

5.8

6.6

12

48

62

52

46

42

52

45

41

53

57

68

61

69

68

64

57

49

45

39

55

32

32

48

43

42

39

Runoff

Inches

.56

26.17

2 22

1.84

21.84

Acre-feet

793

37,120

2,620

31,010

e Control undergoing alteration; discharge computed on basis of gage-height record and record of 

changes in stage caused by construction.

Note.- Stage-discharge relation affected by ice Nov. 11-14, 80,, 21, 23, Dec. 11-20, Dec. 50 to 

Jan.- 5, Feb. 5, 15, 16, Mar. 11-14.
136 PEND OREILLE RIVER BASIN

Burnt Fork Creek near Stevensville, Mont.

Location.- Staff gage, lat. 46°28', long. 113°57', in SWi sec. 11, T. 8 N., R. 19 W., at 

highway bridge, 8 miles southeast of Stevensville.

Drainage area.- 74 square miles.

Records available.- May 1920 to August 1924, April 1938 to September 1941.

Extremes.- Maximum discharge observed during year, 119 second-feet June 4 (gage height, 

1.36 feet); minimum daily, 8 second-feet Dec. 15-17.

1920-24, 1938-41: Maximum discharge observed, 641 second-feet May 28, 1938 (gage 

height, 2.92 feet); minimum observed, 5.6 second-feet (result of discharge measurement) Jan. 18, 1940.

Remarks.- Records good except those for periods of ice effect or no gage-height record, 

which are fair. * Gage read once daily. Several diversions above station for irrigation.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2 - 3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

24

24

24

22

20

a20

20

20

20

19

19

19

a!9

19

19

19

19

IS

18

a!8

18

18

IS

18

19

19

a!9

19

19

18

19

Nov.

19

19

a!9

19

14

IS

IS

19

19

a!8

a!7

b!5

b!3

b!7

b!8

bie

b!9

20

*b!6

blS

b!7

b!7

b!3

b!4

b!6

17

17

17

18

IV

-

Dec.

a!6

16

16

16

16

16

16

a!6

16

16

b!3

*blO

b9

b9

bS

b8

b8

b9

b!2

b!7

b!8

b!6

blV

bl5

a!4

14

14

14

al4

blZ

14

Jan.

a!3

b!2

bll

blO

bio

b!2

b!5

b!6

b!4

b!3

b!2

bll

bll

bl2

b!3

13

13

13

al4

14

13

13

13

13

13

a!3

13

13

b!3

*b!3

bl2

Feb.

12

al2

12

13

b!2

bll

b!2

12

a!2

12

13

13

13

b!2

blO

blO

bll

bll

b!2

b!2

12

12

a!2

12

12

bll

13

*12

_

_

-

Month

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

Novembe r ...................................

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

13

a!2

12

12

12

12

12

12

a!2

b!2

bll

bll

bll

b!2

b!3

a!3

13

14

13

13

13

13

al3

13

13

13

13

11

15

a!6

18

Apr.

18

*19

18

18

18

alV

16

16

17

18

19

20

a!9

IS

20

18

15

14

12

al4

15

16

IV

23

24

22

a2S

28

28

28

Second 

foot-days

604

513

426

10,202

394

333

396

570

1,336

2,160

1,036

646

611

9,075

May

29

33

38

a36

35

29

27

26

27

27

a3S

38

63

60

49

46

46

a44

42

41

42

42

42

46

a60

50

57

57

56

aS6

57

Maximum

24

20

IS

121

16

13

IS

28

63

119

48

26

23

119

June

a!05

101

98

119

103

93

91

a89

87

80

76

73

64

57

a54

52

50

56

66

78

72

 a66

59

56

51

49

49

56

a60

50

Minimum

IS

13

S

6

10

10

11

12-

26

49

25

16

IS

8

July

48

48

48

a46

44

a40

37

35

34

34

33

33

a36

38

38

35

34

35

33

a32

31

30

30

32

32

30

a30

31

28

26

25

Aug.

24

24

a25

26

24

24

24

23

24

a24

23

22

23

23

20

19

a!8

18

18

16

16

16

IS

a!8

IS

18

20

21

20

20

al9

Mean

19.5

17.1

13.7

27.9

12.7

11.9

12.8

19.0

43.1

72.0

35.0

20. S

20.4

24.9

Sept.

a!9

18

18

20

20

22

a22

22

22

22

22

23

21

a21

21

22

21

21

21

22

a21

20

20

18

19

18

20

a!9

18

18

-

Rnnoff in 

acre feet

1,200

1,020

845

20,230

781

660

785

1,130

2,650

4,280

2,150

1,280

1,210

17,990

* Winter discharge measurement made on this day.

a No gage-height record; discharge Interpolated or computed on basis of records for nearby 

stations.

b Stage-discharge relation affected by ice.
PEND OREILLE RIVER BASIN 137

Flathead River at Flathead, British Columbia 

(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 Flathead, British Columbia, and 7 

miles northwest of Trail Creek, Mont.

Drainage area.- 450 square miles.

Records available.- March 1929 to September 1941 (except during winter).

Extremes.- Maximum discharge observed during period of record, 2,930 second-feet May 2 

(gage height, 3.92 feet); minimum discharge observed, 179 second-feet Aug. 22, 23, 25 

(gage height, 1.14 feet); lower discharge may have occurred during winter, when no 

records were obtained.

1929-41: Maximum discharge observed, 10,600 second-feet June 17, 1933 (gage 

height, 6.90 feet); minimum observed, 65 second-feet Apr. 9, 1929; minimum gage height 

observed, 0.76 foot Apr. 9, 1929, Apr. 2, 3, 1937.

Remarks.- Records good. Gage read once daily.

Cooperation.- This station is one of the international gaging stations maintained by 

Canada under agreement with the United States.

Rating table, Apr. 7 to Sept. 30 (gage height, In feet, and discharge, In second-feet)

1.1 

1.4 

1.7 

2.0

165

280

450

2.3 

2.6 

2.9 

3.2

910

1,190

1,510

1,870

3.5 

3.8 

4.2

2,280

2,740

5,420

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

t220

Nov.

f216

Dec. Jan.

Month

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

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

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

Calendar year .........

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

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

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

April 7-30... .................

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

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

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

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

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

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

Feb.

Secondfoot-days

33,062

SS, 013

13,074

6,568 

14,052

-

Mar.

Maximum

2,210

2,930

'?45

264

859

_

Apr.

_

-

-

-

-

.

S59

693

1,070

1,150

1,230

1,190

1,270

1,250

1,400

1,470

1,290

1,070

1,050

1,040

1,110

1,240

1,490

1,620

1,680

1,740

1,870

1,870

2,000

2,210

-

May

2,580

2,930

2,430

2,340

2,140

1,770

1,560

1,400

1,290

1,230

1,290

1,920

2,640

2,360

2,250

2,080

2,280

2,800

2,080

1,910

1,740,

1,620

1,620

1,740

1,970

2,000

1,870

1,620

1,510

1,400

1,400

Minimum

"

~

I ,cOU o^n

590 

264

179 

1S6

_

June

1,620

2,000

1,510

1,440

1,190

1,190

1,130

1,090

1,070

1,000

910

893

S59

S93

825

809

745

729

729

729

729

665

650

642

681

665

620

590

635

745

-

Mean

"

1,380

1,930 

934

422

212

46S

_

Jnly

745

745

665

650

635

620

562

506

464

450

464

450

402

390

366

342

366

342

330

330

320

300

290

342

320

310

280

280

272

272

264

Per 

square 

mile

"

"

"

3 .07 

4.29

2.08 

.94

.47 

1.04

_

Aug.

264

256

256

264

256

248

232

224

216

20S

216

20S

224

216

216

216

20S

20S

200

193

1S6

179

179

186

179

186

193

1S6

186

193

186

Sept.

186

193

193

200

200

216

20S

20S

208

200

248

266

256

39O

492

492

548

859

842

842

809

793

777

745

650

605

620

635

605

576

-

Runoff

Inches Acre-feet

" 

~ "

2 . 74 65, 580

4.95 118,600

2.32 55,560

1.08 25,930

.54 13,030 

1.16 27,870

306, 600

t Result of discharge measurement.
138 PEND OREILLE RIVER BASIN

Flathead River near Columbia Falls, Mont.

Location.- Water-stage recorder, lat. 48°29', long. 114 005', In NWi sec. 7, T. 31 N., 

R. 19 W., three-quarters of a mile upstream from Middle Fork and 10 miles northeast 

of Columbia Falls.

Drainage area.- 1,620 square miles.

Records available.- September 1910 to September 1917, April 1929 to September 1941.

Average discharge.- 13 years (1910-17, 1935-41) 2,727 second-feet.

Extremes.- Maximum discharge during year, 8,010 second-feet May 3 (gage height, 6.71 

feet); minimum, 345 second-feet Dec. 17 (stage-discharge relation affected by Ice).

1910-17, 1929-41: Maximum discharge, 29,500 second-feet June 20, 1916 (gage 

height, 9.8 feet, site and datum then in use); minimum, 323 second-feet Feb. 9, 1939 

(stage-discharge relation affected by Ice).

Remarks.- Records good except those for periods of no gage-height record or ice sffect, 

whlcti are fair. No diversion or regulation.

Rating table, water year 1S40-41, except periods of ice effect (gage height, in feet, 

and discharge, in second-feet)

1.3 

l.fi 

2.0 

2.6

360

460

670

1,030

4.0 

4.5

1,430

1,910

2,500

3,220

5.0 

6.0 

6.7

4,090

6,240

8,010

Discharge, in s«aend-feet, water year October 1940 to September 1941

Day

1 

2 

3

4

e

6

7 

8 

9 

10

11 

12 

13 

14 

16

16 

17

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29

30 

31

Oct.

852 

810 

796 

789 

775

761 

740 

726 

712 

698

719 

775 

1,070 

1,030 

955

940 

910 

880 

852 

831

810 

796 

803 

796 

803

803 

831 

810 

789 

789 

852

Nov.

338 

824 

80S 

782 

768

740 

740 

761 

740 

640

594 

b495 

b425 

b475 

*b540

b595 

b630 

658 

622 

582

634 

604 

604 

604 

610

604 

604 

604 

622 

610

Dec.

599 

588 

577 

572 

577

594 

*599 

594 

582 

572

505 

452 

417 

b400 

b400

b380 

b360 

b420 

b500 

b580

b680 

b720 

b720 

719 

658

634 

640 

616 

604 

582 

572

Jan.

MIS 

19445 

b410 

b440 

b626

566 

g?g 

&S2 

67S 

646

640 

b680 

bS26 

 04 

582

560 

556 

582 

594 

566

a560 

a560 

a 460 

b405 

b385

a470 

*555 

540 

520 

496 

516

Month

Dot 

Nor 

Dec

C

Jan 

Feb 

Mar 

Apr

JuE

Jul 

Aug 

Sep

w

alendar year 1941

ater year 1940-'

Fab.

546 

526 

516 

492 

469

436 

444 

464 

616 

500

496 

600 

492 

464 

420

408 

417 

424 

460 

487

464 

460 

428 

402 

417

448 

464 

464

Secondfoot-daye

25,503 

19,352 

17,413

719,858

16,255 

13, 020 

20,125 

84. 710 

178, 480 

100,590 

47,296 

23,158 

40,204

586,106

Mar.

510 

550 

555 

555 

545

540 

540 

566 

577 

560

545 

520 

496 

505 

545

525 

545 

566 

577 

588

594 

610 

628 

652 

705

768 

838 

910 

1,030 

1,140 

1,340

Maximum

1.07C 

83£ 

72C

13,20C

60^ 

54E 

1,34C 

5,21C 

8, OK 

5,10C 

2,44C 

95E 

2.13C

8,01C

Apr.

1,610 

1,810 

1,910 

1,960 

2,020

2,080 

2,080 

2,080 

2,250 

2,500

2,700 

2,770 

2,840 

2,910 

2,910

2,980 

2,910 

2,700 

2,500 

2,370

2,310 

2,560 

2,840 

3,300 

3,550

3,810 

4,180 

4,380 

4,680 

5,210

May

6,000 

7,230 

8,010 

7,490 

6,730

6,000 

5,100 

4,480 

4,090 

3,720

3,720 

4,090 

6,240 

6,980 

6,730

6,240 

6,000 

7,490 

6,980 

6,000

5,210 

4,890 

4,890 

5,100 

6,240

6,730 

6,000 

5,540 

5,100 

4,680 

4,780

MlTi^mmn

698 

425 

360

360

385 

402 

496 

1,610 

3,720 

2,250 

992 

640 

628

360

June

5,000 

5,100 

4,890 

4,630 

4,480

4,230 

4,090 

4,000 

4,000 

3,720

3,550 

3,380 

3,380 

3,380 

3,380

3,300 

3,140 

2,980 

2,910 

2,770

2,630 

2,500 

2,310 

2,310 

2,500

2,560 

2,370 

2,250 

2,310 

2,440

Mean

823 

645 

562

1,967

524 

465 

649 

2,824 

5,757 

3,353 

1,526 

747 

1,340

1,606

July

2,440 

2,370 

2,370 

2,310 

2,190

2,080 

1,960 

1,860 

1,810 

1,710

1,660 

1,610 

1,560 

1,480 

1,430

1,380 

1,340 

1,300 

1,300 

1,260

1,220 

1,180 

1,100 

1,100 

1,140

1,100 

1,030 

1,030 

992 

992 

992

Per 

square 

mile

0.508 

.398 

.347

1.21

.323 

.287 

.401 

1.74 

3.55 

2.07 

.942 

.461 

.827

.991

Aug.

955 

955 

948 

902

873

845 

817 

803 

782 

775

747 

733 

747 

782 

768

761 

747 

726 

698 

670

652 

640 

646 

646 

646

646 

652 

664 

652 

640 

640

Sept.

626 

640 

677 

698

761

817 

880 

866 

859 

873

925 

1,030 

1,140 

1,260 

1,520

1,660 

1,610 

1,660 

2,020 

2,130

1,960 

1,810 

1,710 

1,710 

1,710

1,660 

1,760 

1,760 

1,760 

1,710

Runoff

Inches

0.59 

.44 

.40

16.56

.37 

.30 

.46 

1.94 

4.09 

2.31 

1.09 

.53 

.92

13.44

Acre-feet

50,580 

38, 380 

34,540

1,428,000

32,240 

25,820 

39,920 

168,000 

354,000 

199,500 

93,810 

45,930 

79,740

1,162,000

* Winter discharge measurement made on this day.

a No gage-height record; discharge computed on basis of weather records and records for nearby 

stations.

b Stage-discharge relation affected by ice.
PEND OREILLE RIVER BASIN 139

Flathead River at Columbia Falls, Mont.

Location.- Water-stage recorder, lat. 48°22', long. 114°11', in SWi sec. 17 T. 30 N., R. 

<iO W., 200 feet downstream from highway bridge at Columbia Falls and 5 miles downstream from South Fork. Datum of gage is 2,978.00 feet above mean sea level, datum 

of 1929 (levels by Corps of Engineers, U. S. Army).

Drainage area.- 4,440 square miles.

Records available.- May 1922 to September 1923 (fragmentary), June 1928 to September

1941.

Average discharge.- 13 years (1928-41), 8,520 second-feet.

Extremes.- Maximum discharge during year, 26,400 second-feet May 14 (gage height, 9.06 

reet;; minimum, 899 second-feet Dec. 16 (gage height, 0.07 foot).

1922-23, 1928-41: 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).

Maximum stage known, 22.7 feet in June 1894, from floodmarks (discharge, about 

150,000 second-feet, from rating curve extended above 80,000 second-feet by logarithmic 

plotting).

Remarks.- Records excellent except those for periods of ice effect, which are fair. No 

diversion.

Bating table, water year 1940-41, except periods of lee effect (gage height, in feet, 

and discharge, In second-feet)

0.1 920 2.0 2,970 5.0 9,560 

.6 1,300 3.0 4,630 7.0 16,800 

1.2 1,900 4.0 6,720 9.0 25,900

Discharge, in second feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

2.0SO 

2,020 

1,960 

1,960 

1,960

1,960 

1,900 

1,840 

1,790 

1,790

1,790 

2,080 

2,400 

2,400 

2,340

2,270 

2,200 

2,140 

2,080 

2,020

1,960 

1,960 

1,900 

1,900 

1,960

1,960 

1,960 

1,900 

1,960 

2,020 

2,080

Nov.

2,080 

2,020 

1,960 

1,900 

hi, 900

hi, 960 

hi, 960 

hi, 960 

hi, 840 

al,740

al, 630 

hi, 550 

hi, 400 

hi, 400 

*1, 490

1,500 

1,550 

1,640 

1,520 

1,580

1,510 

1,560 

1,520 

1,540 

1,520

1,540 

al,590 

hi, 640 

hi, 660 

hi, 600

Dec.

al,570' 

hi, 540 

hi, 580 

hi, 640 

hi, 680

al,700 

*1,720 

1,680 

1,680 

1,670

1,500 

1,340 

1,190 

1,050 

1,070

1,000 

1,010 

1,100 

1,240 

1,330

1,550 

1,750 

1,880 

1,950 

1,960

1,900 

1,900 

1,840 

1,840 

1,740 

1,670

Jan.

1,530 

1,400 

1,240 

1,240 

1,420

1,520 

1,650 

1,540 

1,500 

1,410

1,340 

1,340 

1,370 

1,440 

1,500

1,490 

1,480 

1,500 

1,580 

1,580

1,500 

1,410 

1,200 

1,150 

1,300

*1, 490 

1,650 

1,650 

1,570 

1,500 

1.44C

Feb.

1,45C 

1,46C 

1.42C 

1.38C 

1,31C

1.19C 

1,27C 

1,33C 

1,39C 

1.44C

1,45C 

1,44C 

1,42C 

1.36C 

1.30C

1.25C 

1.26C 

1,29C 

1,38C 

1,43C

1,42C 

1,37C 

1,33C 

1.31C 

1,32C

1.37C 

1,33C 

1.34C

u *!, Second 

Month foot-days

Octc 

Nove 

Dece

Cs

Janu 

Febi 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

We

J.endar year 19' 

ary

h .........................

1 2

ember .....................

62,640 

50,260 

48,320

81,020

44,930 

38,010 

68,270 

62,040 

60,300 

37,820 

29,5EO 

61,390 

95,220

ter year 1940-41 .......... 1,758,620

Mar.

1,420 

1,550 

*1,680 

1,790 

1,790

1,840 

1,840 

1,900 

2,020 

2,020

1,960 

1,840 

1,790 

X 74C 

1*840

1,840 

1,790 

1,840 

1,960 

2,020

2,OSO 

2,080 

2,200 

2,270 

2,400

2,610 

2,900 

3,120 

3,510 

4,000 

4,630

Maximum

2,400 

2,080 

1,960

40,100

1,650 

1,460 

4,630 

16,800 

25,900 

20,200 

6,960 

2,610 

4,440

25,900

Apr.

5,410 

6,250 

6,480 

6,720 

6,720

6,960 

6,720 

6,480 

6,720 

7,470

8,310 

8,610 

3,610 

8,920 

8,920

8,920 

8,610 

7,740 

7,210 

6,720

6,720 

7,210 

8,310 

10,200 

11,600

11,900 

12,600 

13,400 

14,800 

16,800

May

19,300 

22,000 

23,900 

22,000 

20,200

18,400 

16,000 

14, 100 

13,000 

11,600

11,600 

13,700 

20,200 

25,900 

23,900

20, 600 

19, 300 

22,000 

20,600 

17,600

16,000 

14,800 

14,800 

16,000 

18,900

20,200 

18,900 

16, 800 

15,600 

15,600 

16,800

Minimum

1,790 

1,400 

1,000

900

1,150 

1,190 

1,420 

5,410 

11,600 

6,250 

2,680 

1,680 

1,670

1,000

June

18,000 

20,200 

18,900 

17, 600 

16,800

16,000 

14,800 

14,500 

13,700 

13,000

11,900 

11, 600 

11,600 

11,600 

11,200

10,600 

9,890 

9,240 

8,920 

8,310

7,740 

7,210 

6,960 

6,720 

7,210

6,960 

6,480 

6,250 

6,720 

7,210

Mean

2,017 

1,675 

1,559

6,232

1,449 

1,358 

2,202 

8,735 

13,070 

11,260 

4,178 

1,980 

3,174

4,818

July

6,960 

6,720 

6,250 

6,030 

6,030

5,610 

5,410 

5,210 

5,010 

4,720

4,540 

4,440 

4,260 

4,080 

3,910

3,750 

3,670 

3,590 

3,510 

3,430

3,350 

3,200 

3,040 

2,970 

2,970

2,970 

2,820 

2,820 

2,750 

2,820 

2,680

Per 

square 

mile

0.454 

.377 

.351

1.40

.326 

.306 

.496 

1.97 

4.07 

2.54 

.941 

.446 

.715

1.09

Aug.

2, 

2, 

2, 

2, 

2,

2, 

2, 

2, 

2, 

2,

2, 

1, 

1, 

2,

1,

1, 

1, 

1, 

1, 

1,

1, 

1, 

1, 

1, 

1,

1, 

1, 

1, 

1, 

1,

a,

610 

540 

470 

400 

340

270 

200 

140 

080 

080

020 

960 

960 

020 

960

960 

900 

840 

790 

790

740 

680 

740 

790 

740

740 

740 

790 

740 

680 

680

Sept.

1,670 

1,670 

1,790 

2,020 

2,200

2,270 

2,340 

2,270 

2,270 

2,200

2,270 

2,400 

2,630 

2,820 

3,350

3,750 

3,750 

3,750 

4,170 

4,440

4,260 

4,000 

3,830 

3,830 

3,910

3,910 

4,260 

4,440 

4,350 

4,350

Runoff

Inches

0.52 

.42 

.40

19.09

.38 

.32 

.57 

2.20 

4.69 

2.83 

1.08 

.51 

.80

14.72

Acre feet

124,000 

99,690 

95,840

4,524,000

89,120 

75,390 

135,400 

519,700 

1,111,000 

670,100 

256, 900 

121,800 

188,900

3,488,000

n uomputea irom s^an-gage readings.

Note.- Stage-discharge relation affected by Ice Nov 12-26, Dec. 16-24, Jan. 1 to Mar. 6.
140 , PEND OREILLE RIVER BASIN

Flathead River near Kallspell, Mont.

Location.- Chain gage, lat. 48°13', long. 114°15', In NEi sec. 10, T. 28 N./R. 21 W., 

at nighway bridge, 3 miles east of Kalispell. Datum of gage is at mean sea level 

(Somers datum).

Records available.- May 1928 to September 1941.

Extremes.- Maximum elevation observed during year, 2,907.94 feet May 14; minimum 

 observed, 2,899.75 feet Dec. 17.

1928-41: Maximum elevation observed, 2,913.95 feet May 27, 1928; minimum observed, 

that of Dec. 17, 1940.

Remarks.- Records fragmentary but reliable. They were collected for profile study of 

Flatnead River above Flathead Lake. Gage read once daily.

Elevation, In feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oot.

_

0.98

-

.94

.94

.92

.90

.86

-

.76

.76

_

1.20

1.26

1.20

1.16

1.10

1.06

_

1.00

.98

.94

-

.90

.90

_

.92

.92

.92

.92

-

Nov.

1.04

-

_

.94

.94

.94

.94

.92

-

-

.50

.44

.42

.38

-

.62

_

.60

.58

.58

.56

.56

-

.60

.54

.64

.64

.64

-

.66

-

Dec.

0.66

.66

.63

_

.72

.76

.

.72

.72

.70

_

.24

.10

-.08

-.17

-.21

-.25

_

.30

-

.84

.86

.90

.92

-

.99

.36

.80

.76

.76

Jan.

0.74

.68

.60

.50

.44

_

.68

.68

.70

.70

_

.68

.66

.60

.58

.54

.60

_

.72

_

.46

.42

.40

-

.62

.62

.64

-

.38

.36

Feb.

_

0.50

.46

.40

.28

.20

_

..

.48

-

.54

.54

.52

.44

.32

_

.18

.20

.26

.30

.20

_

.02

.10

.52

_

.38

.40

_

_

-

Mar.

0.46

.60

.74

.82

.82

.84

_

.88

.96

.96

.92

.84

.82

-

.66

.80

.90

.92

.98

.98

1.06

1.18

-

1.34

1.42

1-64

_

2.06

2.54

Apr.

2.80

3.24

_

3.46

3.52

3.60

3.60

_

3.50

3.72

_

4.15

4.25

4.24

4.24

4.18

3.95

3. 58

3.50

3.62

3. 98

4.72

4.98

5.26

5.52

5.78

6.30

Hay

6.82

7.25

-

7.45

7.14

_

6.34

5.88

5.62

5.20

_

5.40

7.94

7.75

7.20

6.90

7.35

7.30

7.80

6.28

6-10

5.96

6.68

6.82

6.95

6.50

6.06

6.32

June

_

6.54

6.85

_

6.42

6.24

6.14

5.92

5.52

5.32

5.10

5.06

5.05

4.92

4.60

4.45

4.20

4.10

_

_

3.55

3.55

3.58

3.60

3.54

3.45

3.62

July

3.43

3.34

-

3.22

3.10

2 .98

_

2. 78

2.62

2.26

1.88

_

2.28

2.22

2.10

2.00

1.94

1.80

1.76

1.68

1.60

1.56

1.52

1.48

1.44

1.40

1.38

1.36

Ang.

1.34

1.28

1.24

1.20

-

1.10

1.06

_

1.00

.96

.94

..

.90

.88

-

.88

.86

.84

..

.76

.72

..

.76

.78

.76

.74

.72

.74

.74

Sept.

0.68

.70

.76

-

.88

.94

1.00

_

1.02

1.08

1.14

1.20

_

1.46

1.56

1.70

1.96

2.06

2.16

2.28

_

2.12

2.22

2.06

2.32

o ,34

2.34

2.40

Hote.- Add 2,900 feet to obtain elevation above mean sea level (Somers datum).
PEND OREILLE RIVER BASIN 141

Flathead River at Demersville, near Kalispell, Mont.

Location.- Wire-weight gage, lat. 48°10', long. 114°16', in NEi sec. 28, T. 28 N., R. 21 

w., at Demersville, 3 miles south of Kalispell. Datum of gage is at mean sea level 

(Somers datum).

Records available.- April 1909 to July 1912, April 1928 to September 1941.

Extremes.- Maximum elevation observed during year, 2,893.83 feet June 3; minimum,

 27553731 feet Mar. 27.

1909-12, 1928-41: Maximum elevation observed, 2,904.94 feet June 17, 1933; minimum, 2,881.86 feet Dec. 18-26, 1936.

Remarks.- Records reliable. They were collected for profile study of Flathead River

 above Flathead Lake. Gage read once or twice dally. Since April 1938 elevation of 

water surface has been subject to regulation by Kerr Dam, below outlet of Flathead 

Lake.

Elevation, In feat, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

IS

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

89.46

S9.37

89.32

89.38

89.30

89.25

89.22

89.21

89.20

89.14

89.15

89.12

89.06

89.06

89.02

89.02

88.96

89.00

88.97

88.91

'

88.86

88.86

88.82

88.83

88.72

88.70

88.70

88.69

88.70

88.66

Nov.

88.66

SS.57

68.60

S8.56

S8.50

8S.50

88.46

8S.48

88.34

88.34

68.30

88.28

88.22

88.18

88.20

8S.17

88.17

88.08

88.05

87.99

S8.01

87.95

87.92

87.89

-

87.86

87.83

87.87

87.87

87.84

-

Dec.

87.79

87.74

87.67

S7.73

87.75

87.77

87.73

87.79

87.81

87.85

87.83

87.77

87.75

87.71

87.67

87.55

87.53

87.53

87.53

-

S7.49

87.51

87.51

87.41

87.45

87.37

87.37

87.33

87.27

87.23

87.23

Jem.

87.10

87.08

86.98

86.90

86.86

86.84

S6.74

S6.73

86.60

86.59

86.56

86.46

86.40

86.38

86.34

86.28

86.20

86.18

86.14

86.06

86.00

85.96

85.88

85.72

85.75

85.70

85.61

85.58

85.54

-

Feb.

85.34

85.33

S5.24

S5.16

85.10

S5.0S

84.95

84.98

84.88

84.88

84.84

84.77

84.71

84.66

84.57

84.53

84.46

84.43

84.39

84.37

84.24

84.19

83.99

84.01

84.01

83.99

83.93

83.91

_

_

-

Mar.

83.89

63.87

83.86

83.85

83.85

83. S3

83.79

S3. 81

83.68

83.69

83.61

83.67

83.53

83.57

83.55

83.47

83.47

83.57

S3. 49

83.42

83.42

83.35

83.35

83.35

83.33

83.35

83.31

83.33

83.38

83.47

83.61

Apr.

83.74

S4.00

84.16

84.22

64.34

84.48

84.44

84.44

.84.49

84.63

84.75

85.02

85.10

85.19

85.22

85.31

85.29

85.21

85.12

85.06

85.12

85.28

85.64

86.08

86.18

86.26

86.42

86.72

87.02

87.82

-

May

88.20

88.98

89.84

S9.91

89.70

89.56

89.20

SS.94

88.83

88.72

88.74

88.98

89.86

90.84

91.78

92.38

91.34

91.78

92.15

91.94

91.78

91.74

91.88

92.11

92.58

93.21

93.16

93.06

92.86

93.06

93.10

June

93.41

93.73

93.83

93.77

93.67

93.55

93.47

93.61

93.56

93.51

93.45

93.43

93.47

93.49

93.46

93.41

93.37

93.34

93.39

93.50

93.29

93.20

93.21

93.25

93.35

93.29

93.21

93.25

93.29

93.35

-

July

93.29

93.17

93.15

93.13

93.21

93.17

93.21

93.23

93.15

93.13

93.11

93.13

93.03

93.05

93.07

93.05

93.05

93.07

93.06

93.10

93.19

93.00

92.97

93.01

92.87

92.96

92.91

92.97

92.87

92.85

92.83

Aug.

92.80

92.74

92. SO

92.72

92.60

_

92.57

92.57

92.56

92.50

92.46

92.50

92.50

92.39

92.28

92.30

92.24

-

92.22

92.16

92.10

92.10

92.08

92.05

91.98

91.92

91.96

91.90

91.88

91.84

91.82

Sept.

91.78

91.73

91.68

91.67

91.71

91.74

91. S2

91.65

91.59

91.61

91.60

91.58

91.57

91.54

91.58

91.58

91.50

91.48

91.50

91.52

91.50

91.50

91.51

91.48

91.50

91.54

91.60

91.56

91.62

91.62

-

Mote.- Add 2,800 feet to obtain elevation above mean sea level (Somers datum).
142 PEND OREILLE RIVER BASIN

Flathead River at Daraon Ranch, near Kalispell, Mont.

Location.- Wire-weight gage, lat. 48°09', long. 114°08' 

W., at Damon Ranch, 7 miles southeast of Kalispell. 

(Somers datum).

, in NWi sec. 33, T. 28 II., R. 20 

Datum of gage is mean sea level

Records available.- April 1909 to July 1912, May 1928 to September 1941.

Extremes .- Maximum elevation observed during year, 2,893.42 feet June 19, 20; mininum observed, 2,883.18 feet Mar. 26, 27.

1909-12, 1928-41: Maximum elevation observed, 2,900.94 feet June 17, 1933: minimum, 

2,881.55 feet Jan. 27-31, 1937.

Remarks .- Records reliable. They are collected for profile study of Flathead River above 

Flathead Lake. Gage read twice daily. Since April 1938 elevation of water surface 

has been subject to regulation by Kerr Dam, below outlet of Flathead Lake.

Elevations in feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

18

13

14

15

16

17

18

19

30

31

33

33

24

35

36

27

28

29

30

31

Oct.

89.38

89.34

89.34

89.37

89.27

89.23

89.80

89.18

89.18

89.16

89.10

89.02

89.01

89.00

89.00

88.96

88.95

88.91

88.89

88.88

88.81

88.74

88.75

88.74

88.74

88.75

88.66

88.64

88.64

88.63

88.63

Nov.

88.60

88.57

88.55

88.52

88.50

88.45

88.43

88.43

88.33

88.29

88.22

88.22

88.24

88.15

88.12

88.12

88.08

88.04

88.00

87.96

87.94

87.93

87.88

87.86

87.84

87.84

87.84

87.82

87.80

87.78

-

Dec.

87.75

87.73

87.69

87.69

87.71

87.73

87.74

87.71

87.77

87.77

87.76

87.75

87.72

87.69

87.65

87.59

87.53

87.50

87.48

87.45

87.44

87.46

87.48

87.48

87.46

87.40

87.41

87.36

87.26

87.18

87.11

Jan.

87.04

87.00

86.96

86.92

86.86

86.79

86.73

86.70

86.68

86.59

86.55

86.54

86.38

86.30

86.30

86.28

86.23

86.17

86.14

86.08

85.96

85.91

85.84

85.77

85.75

85.71

85.63

85.57

85.47

85.44

85.37

Feb.

85.30

85.25

85.22

85.18

85.12

85.07

85.00

84.95

84.90

84.83

84.79

84.74

84.70

84.63

84.58

84.56

84.46

84.39

84.34

84.29

84.22

84.12

84.00

84.00

84.00

83.96

83.92

83.89

_

_

-

Mar.

83.85

83.87

83.82

83.79

83.79

83.77

83.74

83.74

83.69

83.62

83.58

83.55

83.47

83.44

83.42

83.41

83.44

83.42

83.39

83.35

83.32

83.28

83.25

83.24

83.22

83.19

K5.19

83.23

83.22

83.30

83.35

Apr.

83.48

83.53

83.68

83.70

83.82

83.90

83.90

83.92

83.92

84.06

84.23

84.32

84.39

84.45

84.48

84.55

84.55

84.55

84.53

84.53

84.58

84.65

84.75

84.97

85.14

85.30

85.45

85.65

85.84

86.25

-

May

86.70

87.26

87.82

87.93

88.00

88.04

87.99

88.03

88.02

88.06

88.16

88.39

89.04

90.04

90.16

90.19

90.28

90.80

90.95

91.02

91.10

91.26

91.41

91.60

91.98

92.27

92.33

92.29

92.34

92.47

92.65

June

98.87

93.06

93.14

93.18

93.12

93.04

93.09

93.22

93.23

93.22

93.21

93.23

93.25

93.26

93.22

93.16

93.19

93.23

93.35

93.37

93.20

P3.18

93.19

P3.18

93.20

93.16

93.13

93.27

93.31

93.21

-

July

93.15

93.13

93.08

93.18

93.14

93.19

93.14

93.16

93.18

93.14

93.08

93.06

93.02

93.04

93.02

93.00

93.05

93.04

93.06

93.04

93.06

93.01

P2.95

92.90

92.89

92.91

92.84

92.89

92.87

92.83

92.84

. Aug.

92.82

92.78

92.73

92.68

92.64

92.61

92.59

92.56

92.54

92.51

92.49

92.43

92.38

92.34

92.35

92.30

92.25

92.21

92.19

92.14

92.10

92.07

92.09

92.04

92.00

_

91.89

91.85

91.83

91.82

91.78

Sept.

91.76

91.72

91.76

91.70

91.66

91.65

91.62

91.59

91.57

91.52

91.51

91.55

91.52

91.49

91.48

91.46

91.43

91.43

91.45

PI. 47

91.47

91.47

91.48

91.47

91.48

91.57

91.50

91.49

91.53

91.58

-

Note.- Add 2,SOO feet to obtain elevation above mean sea level (Boners datum). Daring winter 

period readings occasionally made to ice surface and do not indicate water surface.
FEND OREILLE RIVER BASIN 143

Flathead River at Therriault Ferry, near Kalispell, Mont.

Location.- Staff gage, lat. '48°08', long. 114°09', in NW* sec. 4, T. 27 N., R. 20 W., at 

Therriault Ferry, 9 miles southeast of Kalispell. Datum of gage is at mean sea level 

(Somers datum)

Records available.- October 1934 to September 1941.

Extremes.- Maximum elevation' observed during year, 2,893.26 feet June 20; minimum observed, 

 2,553.17 feet Mar. 25-27.

1934-41: Maximum elevation observed, 2,894.25 leet May 16, 1936; minimum observed, 

2,881.28 feet Jan. 21-23, 1937.

Remarks.- Records reliable. They are collected for profile study of Flathead River above

Flathead Lake. Gage read twice daily. Since April 1938 the elevation of water surface

has been subject to regulation by Kerr Dam, below outlet of Flathead Lake.

Elevations In feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

IS

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

89.36

89.34

89.33

89.31

89.21

89.25

89.21

89.17

89. 12

89.09

89.05

89.01

88.98

88.96

88.94

88.92

Nov.

88.52

88.49

88.46

88.44

88.42

88.40

88.38

88.28

88.26

88.24

88.22

88.20

88.18

88.14

88.13

88.09

88.90i 87.99

88. 88 88. 01

88.871 87.97

88.86

88. 84

87.88

87.89

88.81 87.84

88.77i 87.78

88.74

88.71

88.67

88.63

88.60

88.58

88.56

88.54

87.78

87.79

87.80

87.78

87.77

87.79

87.76

-

Dec.

87.76

87.66

87.64

87.66

87.66

87.68

87.69

87.72

87.74

87.72

87.74

87.73

87.65

87.59

87.57

Jan.

87.03

86.97

86.89

86.85

86.81

86.77

86.71

86.67

86.63

S6.58

86.48

86.39

86.35

86.31

86.27

87.54 86.20

87.49

87.45

87.43

87.41

87.41

87.43

87.37

87.34

87.30

87.32

87.29

87.21

87.19

87.15

87.11

86.14

86.10

86.03

85.99

85.93

85.86

85.78

85.69

85.68

85. 65

85.59

85.63

85.46

85.41

85.36

Feb.

85.34

85.22

85.18

85.12

85.08

85.04

84.95

84.88

84.83

84.80

84.75

84.72

84.67

84.60

84.54

84.50

84.44

84.38

84.33

84.26

84.19

84.13

84.01

84.03

83.99

83.93

83.86

83.81

-

-

-

Mar.

83.77

83.77

83.77

83.75

83.73

83.72

83.70

83.69

83.66

83.61

83.55

83.53

83.50

83.46

83.42

83.39

83.37

83.34

83.32

83.28

83.25

83.23

83.22

83.19

83.17

83.17

83.18

83.19

83.19

83.20

83. 25

Apr.

S5.28

83.38

83.49

83.58

83.62

83.67

85.70

83.74

83.78

83.84

83.92

84.02

84.08

84.14

84.19

84.26

84.30

84.34

84.37

84.38

84.41

84.44

84.48

84.66

84.82

84.99

85.10

85.23

85.40

85.67

-

Hay

86.04

86.45

86.86

87.11

87.27

87.45

87.55

87.60

87.71

87.79

87.92

88.10

88.60

89.21

89.48

89.54

89.84

90.26

90.51

90.59

90.81

90.95

91.11

91.37

91.67

91.92

92.01

92.02

92.09

92.17

92.36

June

92.60

92.77

92.88

92.93

92.89

92.85

92.89

92.96

93.03

93.04

93.05

93.08

93.11

93.13

93 r08

93.02

93.05

93.12

93.20

93. S4

93.12

93.06

93.07

93.11

93.15

93.12

93.09

93.13

93.19

93.17

-

July

93.10

93.03

93.03

93.06

93.09

93.11

93.11

93.10

93.08

93.06

93.06

93.05

93.02

93.03

93.02

93.03

93.02

93.02

93.04

93.04

93.04

93.03

92.94

92.96

92.94

92.90

92.86

92.89

92.88

92.82

92.81

Aug.

92.80

92.72

92.70

92.67

92.65

92.62

92.59

92.57

92.54

92.51

92.46

92.47

92.41

92.37

92.31

92.29

92.24

92.24

92.23

92.17

92.14

92.09

92.06

92.06

91.99

91.93

91.87

91.84

91.82

91.81

91.79

Sept.

91.76

91.76

91.75

91.73

91.69

91.62

91.59

91.60

91.55

91.51

91.48

91.46

91.48

91.47

91.47

91.45

91.43

91.42

91.44

91.46

91.45

91.42

91.44

91.45

91.49

91.54

91.52

91.51

91.55

91.63

-

Note.- Add 2,800 feet to obtain elevations above mean sea level (Somers datum).
144 PEND OREILLE RIVER BASIN

Flathead River near Holt, Mont.

Location.- Staff gage, lat. 48°06', long. 114°06', in IJEi sec. 22, T. 27 N., R. 20 W., at 

Keller Ranch near Holt, Mont. Datum of gage is at mean sea level (Somers datum).

Records available.- April 1909 to July 1912, June 1928 to September 1937, October 1939 to 

September 1941.

Extremes.- Maximum elevation observed during year, 2,893.26 feet June 20; minimum observed, 

2,883.10 feet Mar. 26, 2/7.

1909-12, 1928-37, 1939-41: Maximum elevation, 2,897.35 feet May 29, 30, 1928 (from 

floodmark); minimum observed, 2,881.24 feet Jan. 25-28, 1930.

Remarks.- Records reliable. They are collected for profile study of Flathead River above 

Flathead Lake. Since April 1938 elevation of water surface has been subject to regulation by Kerr Dam, below outlet of Flathead Lake.

Elevations, in feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

_

_

89.24

89.30

89.22

89.17

89.14

89.12

89.08

89.04

89.00

88.94

88.94

88.93

-

_

-

88.86

88.84

88.80

88.76

88.72

88.68

88.66

-

_

88.58

88.58

88.56

«

88.54

Nov.

88.52

_

88.46

88.45

88.44

88.42

88.38

88.36

88.32

88.26

_

-

_

88.10

88.09

88.06

88.00

87.96

87.92

87.88

_

87.86

87.82

87.80

87.81

87.76

87.77

87.74

.

87.74

-

Dec.

87.71

87.69

87.66

-

87.66

87.66

87.71

87.74

-

87.72

87.69

87.66

87.60

87.59

87.54

87.48

87.43

87.37

87.35

87.36

87.38

87.36

87.32

87.34

87.28

_

87.22

87.16

87.10

87.08

Jan.

87.02

86.96

86.92

86.86

86.80

86.76

86.72

86.66

d86.70

86.52

_

86.42

86.34

86.27

86.25

86.16

86.11

86.10

85.96

_

85.82

_

85.67

-

85.62

85.54

85.49

_

85.40

-

Feb.

85.31

85.16

85.10

85.08

_

84.92

84.86

84.82

84.78

84.72

84.68

84.66

84.56

84.52

84.46

84.42

84.36

84.30

84.22

_

84.12

83.98

83.96

83.94

_

83.86

83.80

_

-

Mar.

83.74

83.78

83.75

83.73

d83.62

 .

83.64

83.62

83.62

83.52

83.54

83.50

83.44

83.42

83.38

83.36

83.32

83.28

-

83.22

83.20

83.20

83.16

83.12

83.10

83.10

83.12

83.14

83.16

Apr.

83.14

83.20

83.32

83.38

83.42

83.46

83.56

83. 6D

83.63 83'.'66

83.76

83.84

83.92

83.96

84.06

84.08

.

84.16

84.22

84.26

84.26

84.30

84.35

84.44

84.54

_

_

84.92

85.02

85.22

May

85.48

85.86

86.22

86.56

86.80

87.00

87.22

87.36

87.50

87.64

87.74

87.98

88.16

88.70

89.06

89.38

89.58

90.02

90.16

90.52

90.64

90.80

91.00

91.22

91.46

91.74

91.84

91.94

92.04

92.08

92.26

June

92.48

92.58

92.'74

92.80

92.78

92.83

_

92.90

92.96

92.98

_

93.02

93.06

93.10

93.02

92.98

93.04

93.08

93.16

93.26

93.11

_

93.10

93.08

93.12

93.12

_

93.14

93.20

93.18

-

July

93.08

93.02

93.00

93.00

93.08

93.08

93.16

93.10

93.10

93.04

93.02

93.04

93.00

92.98

93.00

_

93.00

93.06

_

93.08

93.08

_

_

_

92.98

92.88

92.98

92.84

Aug.

92.84

92.78

92.74

92.70

92.64

92.64

92.58

92.58

92.55

92.50

92.45

92.46

92.43

_

92.31

92.32

92.28

92.26

-

92.18

92.16

_

92.10

92.06

-

_

_

91.86

91.84

Sept.

91.72

91.72

_

-

91.70

91.66

91.58

91.58

-

91.50

91.46

91.44

91.44

91.46

91.46

_

91.46

91.42

91.42

91.42

91.42

91.42

..

91.44

-

91.54

91.50

91.51

91.57

91.60

i:i 0 feet to obtain elevations above mean level (Sonars datum).
PEND OREILLE RIVER BASIN 

Flathead Lake at Somers, Mont.

145

Location.- Water-stage recorder, lat. 48°04', long. 114°13', in NEi sec. 26, T. 27 N., 

R. Zi. W., at steamboat dock at Somers. Datum of gage is at mean sea level (Somers 

datum).

Records available.- April 1922 to September 1941.

Extremes.- Maximum elevation during year, 2,893.45 feet (regulated) July 6; minimum, 

 2TBB3T02 feet (regulated) Mar. 30.

1922-41: Maximum elevation, 2,896.26 feet June 19, 1933; minimum, 2,881.07 feet 

Dec. 5, 1936.

Remarks.- Since April 1938 the lake elevation has been subject to regulation by Kerr 

Dam, 4 miles below outlet. Slight diversion and regulation above Flathead Lake.

Elevation, in feet, water year October 1940 to Se]

Day

1

2

3

4

5

6

7

S

9

10

11

12

13

14

15

16

17

IS

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

89.33

89.27

89.24

89.24

89.18

89.12

89.09

89.07

89.03

89.03

S9.00

88.93

88.88

88.87

88.86

88.83.

88.81

88.80

88.77

68.74

88.74

88.70

88.66

88.66

88.66

88.58

88.56

88.55

88.52

88.52

88.48

Nov.

88.46

88.44

68.42

88.40

88.36

88.34

88.35

88.31

88.23

88.21

88.17

88.14

88.10

88.06

88.04

88.02

87.98

87.94

87.92

87.88

87.85

87.83

87.80

87.77

87.75

87.72

87.71

87.71

87.72

87.69

-

Dec.

87.66

87.62

87.61

87.60

87.64

87.63

87.64

87.68

87.68

87.68

87.68

87.65

87.62

87.58

87.51

87.47

87.42

87.38

87.34

S7.32

87.33

87.35

87.32

87.29

87.28

87.23

87.21

87.15

87.10

87. 05

87.02

Jan.

86.96

86. 9O

86.84

86.78

86.74

86.68

86.64

86.59

86.52

86.46

86.41

86.33

86.28

86.22

86.18

86.12

86. 06

86.04

85.98

85.92

85.86

85.80

85.74

85.67

85.63

85.58

85.50

85.45

85.39

85.34

85.27

Feb.

85.23

65.18

85.12

85.06

85.01

84.95

84.89

84.83

84.77

84.73

84.68

84.63

84.59

84.52

84.46

84.40

64.34

84.29

84.22

84.16

84.11

84.05

83.96

83.93

83.89

83.83

83.77

83.73

-

-

-

Mar.

83.71

83.71

83.70

83.69

83.67

83.64

83.62

83.59

83.55

83.54

83.50

83.46

83.42

83.40

83.35

83.31

83.30

83.29

83.25

83.21

83.17

83.15

83.13

83.11

83.09

83.05

83. 05

83.03

83.03

83.04

83.05

Apr.

83.05

83.12

83.19

83.24

83.33

83.40

83.43

83.48

83.52

83.55

83.63

83.69

83.75

83.82

83.89

83.93

83.97

84.04

84.09

84.13

84.17

84.19

84.23

84.30

84.37

84.48

84.59

84.71

84.83

84.99

-

May

85.18

85.44

85.74

86.08

86.41

86.70

86.93

87.16

87.32

87.48

87.63

87.78

88.02

88.36

88.73

89.08

89.39

89.70

89.98

h9O.23

h90.46

h9O . 66

h90.91

h91.13

h91.35

1)91.55

h9J. . 65

h91.74

h91.85

h91.92

h92.11

it ember 1941

June

h92.25

h92.43

h92.56

92.64

92.63

92.61

82.67

92.80

82.83

92.86

92.89

92.91

92.95

92.95

82.89

92.88

92.91

92.98

93.07

93.11

92.97

92.94

92.97

92.99

93.01

93.00

92.98

93.03

93. OS

93. 06

-

July

92.97

92.90

92.92

92.93

82*97

92.99

93.01

92.98

92.97

92.94

92.93

92.94

92.92

92.91

92.93

92.93

92.93

92.94

92.96

92.94

82.95

92.93

92.86

92.81

92.77

92.80

92.78

92.77

92.79

92.74

92.72

Aug.

92.69

92.65

92.63

92.59

92.56

92.54

92.50

92.49

92.46

92.42

92.39

82.37

92.35

92.31

82.25

92.22

82.19

92.18

82.16

92.12

92.07

92.03

92.03

92.01

91.92

91.86

91.83

91.80

91.78

91.77

91.73

Sept.

91.68

91.68

91.70

91.66

91.61

91.58

91.53

91.51

91.51

91.47

91.43

91.46

91.46

91.40

91.40

91.38

91.35

91.34

91.37

91.37

91.37

91.37

91.38

91.37

91.39

91.41

91.39

91.41

91.45

91.48

h Twice-daily staff-gage readings.

Mote.- Add 2,800 feet to obtain elevations above sea level (Somers datum).
146 PEND OREILLE RIVER BASIN

Flathead Lake at Poison, Mont.

Location.- Water-stage recorder, lat. 47°42', long. 114°09', In E& sec. 4, T. 22 N., R. 

 20 W.. at south end of lake at Poison. Datum of gage Is at mean sea level (Somers 

datum).

Records available.- August 1908 to September 1926, June 1928 to September 1941.

Extremes.- Maximum elevation during year, 2,893.08 feet (regulated) June 28; minimum, 

27SB2T80 feet (regulated) Mar. 18.

1908-26, 1928-41: Maximum elevation, 2,896.26 feet June 19, 1933; minimum, 

2,881.12 feet Dec. 13, 1936.

Remarks.- Records reliable. Since April 1938 elevation of water surface has been

subject to regulation by Kerr Dam, 4 miles below outlet. Acceptable capacity table 

not available. Slight diversion and regulation above Flathead Lake.

Elevation, In feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

IS

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

89.25

S9.E8

39.21

89.13

8S.1S

89.12

89.08

89.04

88.98

88.93

88.89

88.94

88.90

88.87

88.83

88.82

88.79

88.74

88.74

88.72

88.64

88.66

88.66

88.63

88.60

88. 62

88.58

88.49

88.47

88.40

88.41

Nov.

8S.43

38.43

88.41

88.37

88.35

88.32

88.26

88.27

88.36

88.28

88.22

88.15

88.06

88.01

87.96

87.92

87.90

87.92

87.86

87.83

87.82

87.76

87.73

87.69

87.67

87.65

87.63

87.62

87.60

87.59

-

Dec.

87.56

87.57

87.50

87.53

87.48

87.54

87.59

87.58

87-61

87.67

87.65

87.65

87.60

87.52

87.51

87.46

87.39

87.34

87.31

87.29

87.29

87.29

87.29

87.26

87.22

87.19

87.14

87.10

87.07

87.03

86.95

Jan.

86.92

86.88

86.83

86.75

86.69

86.64

86.61

86.55

86.48

86.41

86.35

86.28

86.23

86.16

86.11

86.05

86.00

85.96

85.93

85.89

85.85

85. 76

85.72

85.72

85.59

85.51

85.48

85.43

85.38

85.30

85.25

Feb.

35.18

85.13

85.10

85.04

84.92

84.87

84.80

84.76

84.71

84.65

84.62

84.60

84.50

84.48

84.44

84.36

84.29

84.23

84.16

84.11-

84.05

84.00

84.02

83.93

83.80

83.78

83.72

83.68

_

-

Mar.

83.66

83.67

83.64

83.62

83.60

83.56

83.55

83.47

84.51

83.50

83.49

83.45

63.40

83.34

83.33

83.33

83.26

83.09

83.18

83.17

83.14

83.12

33.09

83.06

83.05

83.06

83.03

83.00

82.99

82.99

1 83.02

Apr.

83.09

83.09

83.10

83.17

83.24

83.28

83.36

83.42

83.46

83.50

83.53

83.59

83.71

83.75

83.76

83.87

83.97

83.99

84.02

84.06

84.09

84.14

84.17

84.24

84.32

84.41

84.51

84.63

84.75

84.89

-

Hay

85.08

35.35

85.66

85.97

86.21

86.53

86.83

87.05

87.24

87.41

87.56

87.71

87.94

88.25

88.64

88.95

89.25

89.52

89.84

90.13

90.39

90.64

90.82

91.01

91.24

91.54

91.58

91.67

91.82

91.93

92.07

June

92.17

92.36

92.51

92.61

92.58

92.56

92.63

92.65

92.72

92.78

92.82

92.86

92.89

92.90

92.84

92.82

92.82

92.87

92.95

93.02

92.95

92.92

92.93

92.93

92.93

92.97

92.98

93.04

93.01

93.OO

-

July

92.94

92.88

92.91

92.92

92.93

92.95

92.93

92.90

92.88

92.92

92.91

92.95

92.97

92.93

92.92

92.92

92.92

92.92

92.90

92.88

92.83

92.63

92.86

92.87

92.83

92.77

92.74

92.72

92.70

92.70

92.68

Aug.

92.68

92.67

92.63

92.60

92.55

92.52

92.49

92.45

92.42

92.38

92.37

92.31

92.27

92 .25

92.23

92.19

92.18

92.14

92.09

92.05

92.03

91.98

91.93

91.88

91.92

91.85

91.78

91.78

91.73

91.67

91.62

Sept.

91.62

91.63

91.53

91.53

91.50

91.50

91.63

91.47

91.40

91.42

91.40

91.32

91.27

91.28

91.30

91.29

91.33

91.33

91.33

91.35

91.35

91.33

91.33

91.38

91.35

91-35

91.42

91.40

91.40

91.40

-

Sote.- Add 2,800 feet to obtain elevations above mean sea level (Somers datum).
PEND OREILLE RIVER BASIN 

Flathead River near Poison, Mont.

147

Location.- Water-stage recorder, lat. 47°39', long. 114°20«, in sec. 19, T. 22 N., R. 21 

V., at highway bridge at Norrisvale, 12 miles downstream from Poison. Datum of gage Is 

2,629 feet above sea level (river-profile survey).

Drainage area.- 7,010 square miles.

Records available.- July 1907 to September 1941.

Average discharge.- 34 years, 11,150 second-feet.

Extremes.- Maximum discharge during year, 22,200 second-feet June 4 (gage height, 8.56 

feet); minimum 120 second-feet (estimated from power-plant record) Dec. 8; minimum 

daily, 400 second-feet Dec. 8.

1907-41: Maximum discharge, 82,100 second-feet May 29, 30, 1928 (gage height, 17.1 

feet); minimum, probably less than 5 second-feet April 13, 1938 (caused by power regulation); minimum daily, 32 second-feet April 12, 1938.

Remarks.- Records excellent except those for periods of fragmentary or no gage-height record, which are good. Several small diversions from tributaries above Flathead Lake. 

Flow regulated since April 1938 by Kerr Dam, 4 miles below Flathead Lake, (see p. 146).

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

b

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

7TI

2fi

?9

30

31

Oct.

4,020

4,080

4,080

4,080

4,080

4,020

4,080

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,180

4,020

3,720

3,720

3,720

4,020

4,180

4,180

4,020

4,020

4,020

4,020

4,020

Nov.

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,020

4,020

3,870

4,020

3,720

3,690

3,560

3,620

4,020

3,520

3,400

3,740

4,020

3,600

4,020

4,020

3,490

4,020

4,020

4,020

3,670

3,640

-

Dec.

3,780

3,620

3,700

f 1,960

f2,050

f 1,450

f 1,060

f400

f 1,680

f 1,640

2,420

2,850

3,460

4,020

4,020

4,020

4,020

4,020

4,180

4,180

2,450

2,760

4,300

4,580

4,660

4,960

4,980

5,230

5,000

5,000

5,000

Jan.

5,170

5,000

5,340

5,520

5,520

5,520

5,520

4,760

5,520

5,700

5,390

6,190

5,700

6,280

5,460

6,270

5,250

5,520

5,340

5,340

5,130

6,480

4,860

6,120

6,520

5,520

5,460

5,580

5,440

5,540

5,720

Feb.

5,260

5,610

5,180

5,SSO

5,160

6,120

5,OOC

5,310

5,400

5,340

5,320

5.33C

5.36C

5,34C

5,540

5,550

5.47C

5,440

5,56C

5,600

5,460

5.34C

5,52C

5,340

5,340

5,520

4,98C

4,65C

.

-

-

Month

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

Calendar year 1940 ......................

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

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

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

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

Water year 1940-41 ......................

Mar.

3,150

3,820

4,200

4,340

4,340

4,340

4,340

4,340

3,680

4,470

4,340

4,340

4,340

4,340

4,340

4,340

4,340

4,340

4,340

4,540

4,580

4,580

4,500

4,500

4,500

4,500

4,500

4,500

4,500

4,500

4,500

Apr.

4,320

3,810

4,340

4,340

4,840

5,150

4,780

5,660

5,850

5,950

6,060

6,250

6,440

6,630

6,630

6,420

6,060

6,130

6,060

6,060

6,070

6,060

6,090

5,950

6,250

6,440

6,440

6,870

7,140

6,670

-

Secondfoot-days

124,200

115,880

107,450

2,496,858

171,680

150,560

134,280

175,760

156,980

123,220

113,330

1,896,900

May

6,340

,850

,270

,400

,640

,880

,340

,340

,340

,340

,340

,340

,100

,140

,280

,240

,310

,340

,340

,340

4,340

4,180

4,340

4,340

4,180

9,630

19,600

15,000

10,500

9,400

9,760

Maximum

4,180

4,020

5,230

32,500

6,480

6,120

4,580

7,140

21,600

12,500

4,080

4,240

21,600

June

11,400

11,200

13 , 800

18,200

21,600

17,100

12,500

11,200

13", 100

12,400

11,500

10,900

11,400

15 , 800

16,100

12 , 400

8,260

6,660

4,620

11,200

15,000

7,900

7,230

7,460

7,380

7,470

7,460

7,220

8,720

11,600

-

Minimum

3,720

3,400

400

400

4,760

4,650

3,150

3,810

3,590

3,200

2,190

400

July

12,500

9,340

7,070

5,580

5,800

5,960

6,840

a6,930

a5 , 430

a5,210

a4,580

a4,580

a4,660

a4,750

4,080

4,030

3,900

4,000

4,010

4,080

4,080

4,080

4,080

3,900

3,970

4,080

3,590

3,780

4,080

3,930

4,080

Aug.

4,080

4,080

4,080

4,080

4,080

3,900

4,080

4.08O

4,080

4,080

4,080

4,080

4,080

4,080

4,080

4,080

3,240"

3,400

4,080

4,080

4,080

4,080

4,080

3,200

4,080

4,080

4,080

4,080

3,760

3,920

3,880

Mean

4,006

3,863

3,466

6,822

5,538

5,377

4,332

5,859

11,290

5,064

3,975

3,778

5,197

Sept.

2,420

2,190

3,550

4,080

4,080

4,080

4,080

4,080

3,800

4,000

3,880

3,490

3,940

3,430

3,710

4,080

4,080

4,040

3,700

3,900

4,080

4,080

4,080

4,240

4,040

3,780

3,690

3,030

3,460

4,240

~

Runoff in 

acre-feet

246,300

229,800

213,100

4,953,000

340,500

298,600

266,300

311,400

244,400

224,800

3,762,000

a No gage-height record; discharge computed on basis of power-plant records at Kerr Dam 7 miles 

upstream.

f Fragmentary gage-height record; discharge computed from gage heights which were partly estimated on basis of power-plant records.
148 PEND OREILLE RIVER BASIN 

Middle Fork of Flathead River at Essex, Mont.

Location.- Water-stage recorder, lat. 48°16', long. 113°36', in SWi sec. 14, T. 29 N., R. 

16 W . , 0.6 mile upstream from Ole Creek, 0.7 mile southeast of Essex, and 4 miles downstream from Bear Creek.

Drainage area.- 517 square miles.

Records available.- October 1939 to September 1941.

Extremes.- Maximum discharge during year, 3,410 second-feet May 14 (gage heighf, 5.90 

feet); minimum discharge, 17 second-feet (ice jam upstream) Jan. 11 (gage height, 1.30 

feet); minimum daily discharge, 70 second-feet Feb. 23 (stage-discharge relation affected by ice).

1939-41: Maximum discharge, 6,140 second-feet May 11, 1940 (gage height, 7.09 feet); 

minimum, that of Jan. 11, 1941; minimum daily, 30 second-feet (estimated] Jan. 22, 1940 

(stage-discharge relation affected by ice).

Remarks.- Records good except those for periods of ice effect, which are fair. 

tion or diversions.

No regulaRating table water year 1940-41, except periods of ice effect (gage height, in feet, and discharg 

In second-feet)

1.8 

2.0 

2.4 

2.8

67

107

220

363

3.2 

3.6 

4.0 

4.5

545

780

1,080

1,520

5.0 

5.8

2,060

3,230

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

Z

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

149

149

146

146

146

143

140

138

135

130

143

169

172

166

160

154

152

149

146

140

140

138

138

138

138

140

140

138

143

146

154

Nov.

166

160

152

149

143

138

135

130

120

115

110

115

120

130

140

*150

150

140

130

120

120

130

140

146

138

132

130

 132

135

135

-

Dec.

130

130

140

154

154

160

152

*135

152

149

110

85

90

90

95

100

105

115

140

150

160

160

163

160

152

152

154

152

146

129

115

Jan.

105

100

95

85

90

95

100

105

115

110

95

100

110

115

115

115

115

120

120

120

115

110

105

90

*110

110

115

120

125

132

138

Feb.

130

124

122

120

114

105

100

105

115

115

110

110

110

105

100

95

95

100

100

100

95

90

70

80

100

115

120

124

-

-

-

Mar.

132

132

135

138

 143

149

152

166

172

166

154

140

135

135

135

149

166

175

175

175

175

181

193

199

208

230

256

278

320

393

464

Apr.

584

622

638

644

673

655

616

622

691

801

872

940

948

918

955

932

858

767

728

715

767

858

1,080

1,380

fl,520

fl,470

fl,570

1,780

2,060

2,390

-

May

2,680

2,900

2,900

2,600

2,390

2,000

1,720

1,470

1,330

1,240

1,280

1,780

2,900

3,230

2,600

2,190

2,120

2,320

2,000

1,720

1,520

1,470

1,520

1,720

1,880

1,830

1,620

1,520

1,420

1,520

1,780

June

1,830

1,880

1,780

1,670

1,620

1,530

1,420

1,380

1,280

1,160

1,080

1,040

1,000

1,000

932

836

780

734

691

655

616

572

556

556

562

515

490

525

655

697

-

July

697

633

584

572

545

500

477

450

424

406

389

393

376

355

Aug.

240

230

223

214

208

202

196

190

187

187

181

175

175

172

340 ! 166

324 163

317 160

313

302

295

"284

267

260

256

264

260

250

243

264

274

250

154

152

149

146

149

166

163

154

146

152

152

154

149

143

Sept.

140

143

163

172

166

157

160

160

157

154

152

154

184

196

233

246

230

227

243

246

240

227

217

233

246

253

295

310

310

3B4

Month

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

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

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

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

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

Water year 1940-41 ..........

Secondfoot-days

4,526 

4,051 

4,179

216,173

3,395 

2,969 

5,921 

30,054 

61,170 

30,042 

11,564 

5,398 

6,338

169,607

Maximum

172 

166 

163

5,610

138 

130 

464 

2,390 

3,230 

1,880 

697 

240 

324

3,230

Minimum

130 

110 

85

30

85 

70 

132 

584 

1,240 

490 

243 

143 

140

70

Mean

146 

135 

135

591

110 

106 

191 

1,002 

1,973 

1,001 

373 

174 

211

465

Per 

square 

mile

0.282 

.261 

.261

1.14

.213 

.205 

.369 

1.94 

3.82 

1.94 

.721 

.337 

.408

.899

Runoff

Inches

0.33 

.29 

.30

15.55

.25 

.21 

.43 

2.16 

4.40 

2.16 

.83 

.39 

.46

12.21

Acre-feet

8,980 

8,040 

8,290

428,700

6,730 

5,890 

11,740 

59,610 

121,300 

59,590 

22,940 

10,710 

12,570

336,400

* Winter discharge measurement made on this day.

f Discharge computed on basis of partly estimated gage-height record. 

Note.- Stage-discharge relation affected by ice Hov. 7-23, Dec. 11-22, Dec 

6-27, Mar. 12-15.

31 to Jan. 29, Feb.
PEND OREILLE RIVER BASIN 149

Middle Fork of Flathead River near Belton, Mont.

Location.- Staff gage, lat. 48°29'50", long. 114°00'30", In NEi sec. 34, T. 32 N., R. 19

 W., three-quarters of a mile downstream from McDonald Creek, li miles west of Belton, 

and 34 miles upstream from mouth.

Drainage area.- 1,140 square miles.

Records available.- October 1939 to September 1941.

Extremes.- Maximum discharge observed during year, 7,620 second-feet May 14 (gage height,

 5.22 feet); minimum observed, 268 second-feet Dec. 17 (gage height, 1.14 feet).

1939-41: Maximum discharge observed, 12,800 second-feet May 12, 1940 (gage height, 

6.66 feet); minimum observed, 232 second-feet Jan. 21, 1940 (gage height, 1.08 feet).

Remarks.- Records good. No regulation or diversion. Gage read once daily.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

1.1 

1.4 

1.8

250

400

680

2.2 

2.7 

3.2

1,070

1,680

2,440

3.3 

4.5 

5.2

3,610

5,410

7,620

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

640

640

6OO

600

640

600

600

565

565

530

530

815

770

770

725

680

680

600

640

640

600

600

565

565

565

565

565

565

530

530

565

Nov.

565

565

565

565

495

530

530

565

495

400

372

372

372

372

372

400

400

430

430

400

430

400

430

400

430

430

430

400

430

430

-

Dec.

430

430

430

460

495

495

495

460

495

430

372

340

300

310

310

272

268

310

400

460

495

495

495

495

495

495

530

495

495

495

460

Jan.

460

430

372

372

460

460

46O

430

430

430

372

372

372

430

430

430

430

430

460

430

430

430

320

320

310

430

430

430

400

372

372

Month

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

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

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

Calendar year 1940 .........

January

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

4OO

400

372

372

372

330

340

372

400

400

400

400

372

372

372

320

310

320

372

372

372

372

372

310

330

372

340

372

-

-

-

Secondfoot-days

19,045

13,405

13,407

653,107

12,704

10,208

17,734

78,010

163,020

107,290

43,060

17,860

28,770

524,513

Mar.

372

372

400

400

4OO

430

430

460

495

495

495

495

430

430

400

460

495

495

530

530

565

565

565

600

640

725

770

860

960

1,120

1,350

Maximum

615

565

530

12,400

46C

40C

1,350

5,120

7,620

6,310

2.44C

815

1,350

7,620

Apr.

1,750

1,S20

1,900

1,900

1,970

1,970

1,970

1,900

2,120

2,230

2,440

2,440

2,440

2,440

2,440

2,610

2,440

2,280

2,120

2,120

2,120

2,120

2,440

3,180

3,610

3,610

3,830

4,060

4,570

5,120

-

May

6,000

6,630

6,950

6,310

5,700

5,410

4,570

4,060

3,830

3,610

3,390

4,060

6,000

7,620

6,630

5,700

5,410

6,630

5,700

5,120

4,570

4,310

4,310

4,840

5,700

6,000

5,120

4,340

4,310

4,570

5,120

Minimum

530

372

268

232

310

310

372

1,750

3,390

1,820

S15

460

430

268

June

5,7OO

6,310

5,700

5,410

5,120

4,340

4,570

4,570

4,310

4,06O

3,830

3,330

3,830

3,830

3,610

3,390

3,160

2,980

2,790

2,440

2,440

2,280

2,280

2,280

2,440

2,280

2,120

1,820

2,440

S.61O

-

Mean

614

447

432

1,784

410

365

572

2,600

5,259

3,576

1,3S9

576

959

1,437

July

2,440

2,280

2,230

2,120

1,900

1,900

1,820

1,750

1,680

1,540

1,480

1,430

1,430

1,350

1,290

1,290

1,240

1,290

1,130

1,120

1,070

1,070

1,020

960

910

910

860

860

S15

860

315

Per 

square 

mile

0.53S

.392

.379

1.56

.360

.320

.502

2.28

4.61

3.14

1.22

.505

.341

1.26

Aug.

815

770

725

725

680

640

540

540

500

600

600

500

565

565

565

565

565

530

530

530

495

495

530

530

495

495

460

495

495

460

460

Sept.

430

460

495

640

725

725

770

725

725

680

725

725

815

910

1,020

1,120

1,120

1,120

1,240

1,240

1,240

1,180

1,120

1,120

1,180

1,180

1,350

1,350

1,350

1,290

-

Runoff

Inches

0.62

.44

.44

81.32

.42

.33

.58

2.54

5.32

3.50

1.41

.58

.94

17.12

Acre-feet

37,780

26, 590

26,590

1,296,000

25,200

20,250

35,170

154,700

323,300

212,800

85,410

35,420

57,060

1,040,000
150 FEND OREILLE RIVER BASIN 

South Fork of Flathead River near Columbia Falls, Mont.

Location.- Water-stage recorder, lat. 48°22', long. 114°03', In NEi sec. 17, T. 30 N.,

 R I9~TT 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 (Corps of Engineers, U. S. 

Army, bench mark).

Drainage area.- 1,640 square miles.

Records available,.- September 1910 to September 1916, April 1923 to September 1941.

Average discharge^- 12 years (1928-32, 1933-41), 2,906 second-feet.

Extremes.- Maximum discharge during year, 11,200 second-feet May 14 (gage height, 9.12

 feet); minimum daily, 340 second-feet Dec. 15, but may have been less during period of 

ice effect; minimum gage height, 1.02 feet Jan. 3. 1910-16, 1923-41: Maximum discharge observed, 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, 206 second-feet Dec. 6, 1935 (stage-discharge relation 

affected by ice).

Remarks.- Records excellent except those for periods of ice effect, which are fair.

Rating table, water year 1940-41, except period of ice effect (gage height, in feet, 

and discharge, ,in second-feet)

1.1 

1.5 

2.0

420

600

910

3.0 

4.0 

5.0

1,690

2,680

3,960

6.0 

7.5 

9.0

5,420

8,000

11,000

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

I

Oct.

496

496

488

488

505

492

480

476

464

456

464

530

555

570

570

555

540

525

515

505

496

488

484

480

496

505

500

505

525

545

565

Nov.

575

575

555

540

530

515

515

550

545

505

500

400

360

380

400

#424

440

470

490

500

490

490

480

480

490

510

500

500

500

520

_

Dec.

520

520

520

520

520

520

520

«515

510

500

460

410

380

360

340

350

360

370

390

430

510

540

550

550

550

540

540

530

510

490

470

Jan.

440

420

410

400

410

440

480

480

470

450

420

420

420

430

440

460

480

500

520

540

530

520

*496

460

440

480

520

520

500

470

460

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

470

500

510

490

460

460

480

500

520

530

540

530

510

480

470

460

450

460

470

490

500

500

480

480

490

520

550

610

_

-

_

Secondfoot-days

15,759

14,729

14,795

834,007

14,426

13,910

29,540

97,660

205,010

118,940

35,724

17,253

23,547

601,293

Mar.

670

770

800

*810

810

810

S10

840

875

875

840

810

738

732

756

732

750

762

810

840

875

875

910

980

1,020

1,120

1,240

1,360

1,520

1,740

2,060

Apr.

2,410

2,680

2,740

2,740

2,790

2,790

2,680

2,570

2,680

2,910

3,100

3,240

3,300

3,240

3,240

3,100

2,910

2,620

2,460

2,310

2,410

2,620

3,100

3,690

4,240

4,240

4,380

4,660

5,420

6,390

_

Maximum

570

575

550

14,500

540

610

2,060

6,390

11,000

8,180

1,920

744

1,240

11,000

May

7,460

8,360

8,550

7,820

7,280

6,390

5,420

4,810

4,380

3,960

4,100

5,420

8,550

11,000

9,320

7,820

7,460

7,820

7,100

6,060

5,420

5,110

5,260

5,900

6,920

7,460

6,740

5,900

5,260

5,740

6,220

Minimum

456

360

340

340

400

450

670

2,310

3,960

1,920

774

468

492

340

June

6,920

8,180

7,280

6,740

6,390

6,060

5,580

5,260

4,960

4,660

4,240

4,100

3,960

3,960

3,820

3,560

3,240

3,100

2,910

2,740

2,520

2,310

2,210

2,110

2,160

2,060

1,920

1,920

2,060

2,010

_

Mean

508

491

477

*

465

497

953

3,255

6,613

3,965

1,152

557

785

1,647

July

1,920

1,780

1,740

1,690

1,640

1,560

1,520

1,490

1,360

1,280

1,240

1,240

1,160

1,120

1,080

1,050

980

980

945

945

910

840

810

810

810

840

810

780

S10

810

774

Per 

square 

mile

0.310

.299

.291

1 *39

.284

.303

 581

1. 98

4.03

2.42

.702

.340

.479

1.00

Aug.

744

720

696

672

648

624

606

590

580

580

570

580

560

550

540

530

520

500

492

480

472

468

492

510

500

4SS

500

515

520

510

496

Sept.

496

492

550

642

648

618

636

595

570

565

575

580

672

678

780

875

840

840

910

910

910

875

840

875

910

945

1,080

1,200

1,200

1,240

..

Runoff

Inches

0.36

.33

.34

18 91

.33

32

 67

2.21

4.65

2.70

 81

.39

.53

13.64

Acre-feet

31,260

29,210

29,350

1,654,000

28,610 

27,590

58,590 

193,700

406,600

235,900

70,860

34 S20

46*700

1,193,000

* Winter discharge measurement made on this day. 

Note.- Stage-discharge relation affected by ice NFov. 12 to Mar. 4.
PEND OREILLE RIVER BASIN 151

Stlllwater River near Whiteflsh, Mont.

Location.- Water-stage recorder, lat. 48°19', long. 114°23', In SWi sec. 34, T. 30 N., R. 

22 W. , 600 feet downstream from highway bridge, 7 miles southwest of Whiteflsh, and 10 

miles upstream from Whiteflsh Creek.

Records available.- November 1930 to September 19<il. 

Average discharge.- 11 years, 306 second-feet.

Extremes.- Maximum discharge during year, 40S second-feet May 8 (gage height, 3.81 feet); 

minimum, 52 second-feet Aug. 22, 23 (gage height, 0.64 foot).

1930-41: Maximum discharge, 2,680 second-feet Apr. 28, 1934 (gage height, 14.47 

feet); minimum, probably less than 50 second-feet during period of Ice effect, Jan. 

21-31, 1940.

Remarks.- Records good except those for periods of Ice effect and those computed on basis 

of once-daily gage readings, which are poor. Some water stored during high-water 

periods and released for logging operations during summer. No diversion.

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2 

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

62

64 

64

64

63

62

61

61

60

62

61

58

5S

58

58

58

59

58

58

53

58

58

58

58

58

56

5S

.53

5S

5S

58

Nov.

60

60 

58

58

69

69

66

66

61

60

69

69

69

*70

71

72

72

72

72

72

.

1

> 70 1

>

1 

J -

Dec.

>.

\ 80

J

S2

«81

SI

81

70

.

1

> 60

'

-.

I

> 70

J

,

I

f 70

I

>

Jan.

)-

}"

} 

1

\ 70

I

69

«68

67

66

65

Feb.

 i

> 70

'

,

1

> 70

1

'

70

v

1

> 65

/

70

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

August .............'........... ............

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

Water year 1940-41 ........ .............

Mar.

71

*74 

77

80

84

90

1-

105

106

102

102

104

105

108

113

119

124

145

172

172

Apr.

178

184 

195

207

231

244

244

244

244

244

244

244

250

250

256

256

256

256

250

244

237

231

231

231

225

225

231

244

256

263

-

Secondfoot-days

1,843

2,060

2,205

61,397

2,050

1,935

3,203

7,095

11,213

7,785

3,289

1,720

2, 116

46,514

May

276

304 

370

393

393

408

40S

408

393

370

356

340

326

326

326

340

356

370

37S

37S

393

393

378

340

326

326

326

348

37S

393

393

Maximum

64

-

-

688

_

172

263

408

370

167

63

102

408

June

370

333 

348

356

356

340

333

318

318

304

297

290

276

263

256

256

250

231

231

225

207

207

201

195

189

184

17S

167

150

156

-

Minimum

56

5S

-

_

71

17S

276

150

67

53

54

53

July

167

167 

167

162

156

150

145

140

135

125

119

112

105

91

94

92

91

S9

S6

84

S2

81

7S

74

74

74

71

69

71

71

67

Aug.

63

63 

60

59

58

56

55

54

54

54

54

55

54

56

56

56

56

54

53

54

53

53

53

54

53

53

54

55

56

56

56

Mean

59.5

68.7

71.1

168

66.1

69.1

103

236

362

106

55.5

70.5

127

Sept.

54

55 

56

58

60

58

58

57

57

59

61

61

61

62

64

67

68

71

74

76

77

78

7S

81

SS

88

95

93

99

102

~

Runoff in 

ao re feet

3,660

4,090

4,370

121,800

4,070

3,S40

6,350

14,070

22,240

15,440

6,520

3,410

4,200

92,260

* Winter diacharge measurement made on this day.

Hote.- Discharge computed on basis of once-daily gage readings Oct. 12 to Dec. 5. Stage-discharge 

relation affected by ice Nov. 14 to Bar. 19.
152 PEND OREILLE RIVER BASIN

Logan Creek at Tally Lake, near Whitefish, Mont.

Location.- Staff gage, lat. 48°27', long. H4°34' , in NWi sec. 17, T. 31 N. f R. 23 W., 

about 2i miles north of Tally Lake and 10 miles west of Whitefish.

Records available.- April 1936 to September 1941. August-1931 to April 1933 and May to 

September 1934 at site about 2i niles upstream.

Extremes.- Maximum discharge observed during year, 90 second-feet May 6 (gage height, 

1.91 reet); minimum observed, 2.2 second-feet Oct. 1-3.

1931-33, 1934, 1936-41: Maximum gage height, 7.22 feet May 28, 29, 1933, site 

and datum then in use (discharge not determined); minimum discharge observed, 0.7 

second-foot Sept. 1, 2, 1940.

Remarks.- Records good except those for period of backwater from beaver dain, which are 

poor. Gage read twice daily. Natural storage in Tally Lake.

Discharge, in-second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

2.2

2.2

2.2

2.5

2 9

2.9

2.9

2.9

3.1

3.1

3.3

3.8

4.1

4.4

4.4

4.4

4.4

4.4

4.4

4.4

4.7

4.7

4.7

4.7

9.1

7.6

7.2

7.2

7.6

8.0

9.0

Nov.

10

10

11

11

11

12

12

12

14

13

12

12

12

11

10

10

10

10

10

10

11

11

11

11

11

12

12

13

14

14

~

Dec.

15

16

16

16

16

16

16

16

16

15

15

15

16

16

15

15

15

15

14

14

14

13

13

13

13

13

13

13

14

14

14

Jan.

14

14

14

14

14

14

13

13

13

13

13

13

13

13

12

11

12

12

13

13

13

13

13

13

13

13

13

13

13

13

13

Month

Feb.

13

13

13

13

14

13

13

13

12

12

11

11

11

11

11

11

11

12

12

12

13

11

11

11

11

11

11

12

_

_

-

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

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

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

Calendar year 1940 ......................

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

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

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

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

Hay. av .......................................

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

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

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

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

Water year 1940-41 ......................

Mar.

12

14

14

15

15

15

15

15

14

14

14

13

12

12

11

11

11

10

10

12

12

12

12

13

14

15

16

18

20

24

28

Apr.

31

37

43

63

68

70

72

72

72

72

72

75

79

79

79

77

77

77

73

73

75

75

77

77

75

77

75

75

73

73

~

Secondfoot-days

143.4

343

455

10,898.9

404

333

443

2,113

2,056

1,079

325.9

124.9

207

8,027.2

May

72

72

79

84

88

90

SS

88

84

SI

79

75

75

72

68

66

65

61

58

58

58

55

52

50

48

44

43

48

50

51

54

Maximum

9.1

14

16

106

14

14

28

79

90

52

22

12

90

June

52

52

52

52

51

50

50

50

47

45

43

40

38

38

36

34

32

31

30

29

27

25

24

24

23

22

20

SO

20

22

-

Minimum

S.2

10

13

.7

11

11

10

31

43

20

4.3

-

2.2

July

22

22

21

21

21

20

19

18

13

11

11

9.8

9.4

8.6

8.6

8.6

8.2

7.4

7.0

6.5

6.0

5.8

5.2

4.S

4.8

4.5

4.3

4.3

4.5

4.3

4.3

Aug.

4.1

4.1

4.5

4.5

4.3

4.3

4.1

4.1

3.9

3.9

3.7

3.7

3.9

3.9

3.9

} 

}'

} 

Mean

4.63

11.4

14.7

29. 8

13.0

11.9

14.3

70.4

66.3

36.0

10.5

4.03

6.90

22.0

Sept.

} '

} 

1 .

1

) '

1 .

I

} -

12

10

~

Runoff in 

acre-feet

284

680

902

21,620

801

660

879

4,190

4,080

2,140

646

248

411

15,920

Note.- Discharge for period of backwater from beaver dam, Aug. 16 to Sept. 28, computed on basis 

of one discharge measurement, gage heights, and records for Stillwater River near Whitefish. Discharge for Oct. 1 to Nov. 17, computed from readings on staff gage 400 feet downstream.
PEND ORKILLE RIVER BASIN 153

Whitefish Creek near Kaltspell, Mont.

Location.- Water-stage recorder, lat. 48°19', long. 114°16', in SW£ sec. 34, T. 30 N., 

R. 21 W., 8 miles north of Kalispell and 8 miles upstream from mouth. Datum of gage 

is 2,969.7 feet above mean sea level, datum of 1929 (Corps of Engineers, U. S. Army, 

bench mark).

Records available.- November to December 1906, July 1928 to September 1941-. 

Average discharge.- 12 years (1929-41), 175 second-feet.

Extremes.- Maximum discharge during year, 488 second-feet May 6 (gage height, 2.60 

feet); minimum, 24 second-feet Sept. 1, 5, 6, (gage height, 1.06 feet).

1906, 1928-41: 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.- Records good except those for periods of ice effect, which are poor. Some 

regulation at Whitefish Lake. No diversion.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

- 19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

57

59

59

59

59

57

57

66

55

63

53

53

53

53

53

51

51

51

51

49

47

47

47

47

47

47

47

45

45

45

45

Nov.

47

49

51

49

49

49

49

49

51

49

48

45

47

49

51

49

*47

47

45

45

45

43

45

45

45

47

47

47

49

49

-

Dec.

49

49

49

49

49

49

49

49

*49

49

48

h47

h44

h42

h40

h36

Il33

h38

h45

h57

67

75

SO

80

79

79

70

61

53

51

49

Jan.

47

46

42

46

48

} 

} 

57

57

57

56

54

52

«48

46

42

52

-<

> 50

 >

Feb.

1 -

i

-.

I

y 55

|

J

55

Mar.

51

59

*67

70

72

72

72

72

74

74

72

65

66

63

63

61

59

}"

65

53

49

_

-

-

Month

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

Novembe r

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

Calendar year 1940 .................. ...

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

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

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

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

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

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

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

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

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

Water year 1940-41 ... ..................

59

61

61

63

65

67

67

70

79

83

88

98

106

110

Apr.

118

129

132

135

135

137

137

137

140

143

146

152

155

158

15S

158

158

158

155

155

155

158

161

164

167

170

183

192

199

208

-

Second 

foot-days

1,597

1,427

1,664

49,375

1 499

l)467

2, 20S

4,653

11,531

7,799

2,743

1, 634 

2,440

40,662

May

221

247

281

306

330

476

472

452

437

414

392

377

373

377

384

384

380

392

392

388

380

373

366

359

362

362

362

373

380

373

366

Maximum

59

51

80

530

57

110

476

362

108

65

126

476

June

362

355

351

348

348

337

326

323

323

320

306

295

281

274

270

267

257

247

241

234

228

215

212

202

199

189

170

108

103

108

Minimum

45

43

33

33

51

HE

221

103

67

25

24

24

July

108

103

100

100

100

100

98

98

100

98

96

96

96

96

93

90

90

8S

86

86

S6

81

79

76

74

74

74

70

70

70

67

Aug. Sept.

65 24

65 26

65 25

65 25

65 26

61 24

59 25

57 25

57 103

57 121

53 124

53 126

53 126

55 126

55 124

57 124

55 124

53 121

53 121

53 118

53 118

51 116

53 113

55 113

55 113

53 63

45 42

33 38

28 35

27 33

25

Mean

51.5

47 6

53.7

136

43.4

52 4

ft-t O (!. £.

155

372

960

88.5

52.7

81.3

111

Runoff in 

acre feet

3,170 

2, 830

3,300

98,930

2,970

4*. 380

9,230 

22 8VO

16*470 5 440

3 240

4*840

80.650

* Winter discharge measurement made on this day.

la. Discharge computed on basis of once-daily staff-gage reading.

Note.- Stage-dlacharge relation affected by Ice Nov. 11-14, 22, 23, Dec. 11-25, Jan. 1 to^Feb. 26.
154 PEND OREILLE RIVER BASIN

Ashley Creek near Kalispell, Mont.

Location.- Wire-weight gage and Clppoletti weir,iat. 48°11', long. 114°24', in SEi sec. 

16, T. 28 N., R. 22 W., 4 miles west of Kalispell.

Records available.- April 1931 to mrch 1933, April 1934 to September 1941.

Extremes.- Maximum discharge observed during year, 19 second-feet Mar. 18, 19 (gage 

height, 3.78 feet); no flow for long periods.

1931-41: Maximum discharge observed, 285 second-feet Apr. 26, 1934 (gage height, 

9.30 feet, former control and datum); no flow for long periods.

Remarks.- Records good. Gage read twice dally, 

and Smith Lakes.

diversions. Storage In Ashley

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

2.5

2.6

2.7

2.S 

3.0 

3.2

1.5 

3.1 

5.3

3.4 

3.6 

3.8

S.I 

12 

19

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct. Nov. Dec. Jan.

Month

Feb.

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

Calendar year 1940 ......................

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

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

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

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

Water year 1940-41 ......................

Mar.

0.2

2.6

3.8

2.S

1.6

1.3

1.3

.7

.7

.7

.8

.8

1.6

2.9

4-6

6.9

7.2

17

17

15

15

13

13

9.5

9.5

9.9

9 «2

9.5

9.5

e.i

9.2

Apr.

7.5

8.0

9.7

d8.8

dll

d5.8

d6.9

d5.8

5.4

4.8

6.6

6.8

6.6

6.5

9.9

6.5

2.0

3.9

3.9

4.5

5.3

3.6

5.2

3.7

3.7

3.2

3.3

3.7

3.6

4.0

Secondfoot-days

0

1,727.0

0

542.2

Hay

5.1

4.5

5.3

6.S

7.S

S.5

5.8

6.0

3.9

3.7

4.6

4.3

4.1

4.6

4.0

4.2

4.8

4-8

4.6

3.7

3.8

1.7

1.9

1.7

1.4

1.1

1.3

2.1

1.8

1.3

1.4

Maximum

0

28

2 9

0

17

June

2.5

l.S

2.0

1.9

2.2

2.5

2.1

0 Q

2.9

1.8

1.0

1.0

1.0

1.0

.9

1.0

1.0

1.0

1.1

1.4

.8

.6

.7

.6

.8

.8

.4

.5

.7

.9

Minimum

0

0

o

0

0

July

0.9

.8

.8

.6

.6

.6

.5

.5

.5

.4

.2

.2

.1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Aug.

Mean

0

4.72

1 32

22

0

1.49

Sept.

Runoff in 

acre feet

0

3,420

VS.Q

79

0

1,080

d Doubtful gage-height record; discharge computed on assumption that Inconsistent gage heights were 

reported 1 foot too low.
PEND OREILLE RIVER .BASIN 155

Swan River near Big Fork, Mont.

Location.- Water-stage recorder, lat. 48°01', long. 113°59', in NWi sec. 14, T. 26 If., 

R. 19 W., at outlet of Swan Lake, 7 miles southeast of Big Fork.

Drainage area.- 647 square miles.

Records available.- April 1922 to September 1941. October 1910 to May 1911 at site 2 

miles upstream from Swan Lake.

Average discharge.- 15 years (1922-24, 1928-41), 974 second-feet.

Extremes.- Maximum discharge during year, 2,120 second-feet June 3 (gage height, 3.88 

feet); minimum, 266 second-feet Aug. 22 (gage height, 1.97 feet).

1922-41: Maximum discharge, 8,280 second-feet June 18, 1933 (gage height, 7.00 

feet); minimum, 85 second-feet Jan. 26-29, 1930 (gage height, 0.04 foot).

Remarks.- Records good. No diversions above station. Natural storage in Swan Lake.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

h371 

h371 

360 

360 

360

354 

349 

344 

344 

340

344 

349 

354 

365 

365

376 

381 

387 

387 

381

371 

376 

365 

365 

360

354 

349 

354 

360 

365 

371

Nov.

381 

381 

381 

392 

387

387 

387 

381 

381 

381

371 

365 

354 

344 

349

340 

344 

349 

354 

344

335 

344 

335 

326 

331

326 

340 

340 

360 

365

Dec.

3S7 

381 

376 

387 

392

381 

387 

381 

376 

376

371 

360 

344 

326 

303

292 

288 

288 

299 

317

340 

349 

365 

376 

381

387 

398 

398 

398 

392 

381

Jan.

381 

371 

344 

331 

335

340 

344 

344 

344 

340

335 

335 

331 

331 

335

340 

344 

354 

360 

360

360 

360 

360 

354 

565

354 

354 

349 

344 

331 

326

Feb.

326 

326 

326 

321 

317

308 

299 

299 

303 

308

312 

312 

308 

308 

303

299 

296 

288 

288 

292

292 

292 

284 

288 

292

296 

292 

288

Month SecondMonta foot-days

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 194< 

arv

1........... ..............

ember .....................

11,232 

10,755 

11,177

39,642

L0,756 

8,463 

LI, 908 

22,368 

51,770 

12,987 

L8,885 

9,983 

LI. 210

ter year 1940-41 .......... 221, 494

Mar.

292 

306 

310 

333 

333

350 

356 

356 

368 

380

392 

386 

374 

362 

356

356 

356 

356 

374 

386

398 

404 

411 

417 

429

435 

442 

449 

462 

476 

503

Maximum

387 

392 

398

3,650

381 

326 

503 

1,030 

2,050 

2,120 

960 

411 

483

2,120

Apr.

540 

563 

602

634 

675

692 

718 

718 

726 

709

709 

726 

770 

815 

824

806 

806 

797 

770 

743

718 

700 

692 

692 

752

788 

824 

878 

951 

1,030

May

1,150 

1,310 

1,500 

1,660 

1,740

1,740 

1,670 

1,570 

1,400 

1,340

1,240 

1,190 

1,290 

1,600 

1,910

2,050 

2,050 

2,050 

2,050 

1,980

1,810 

1,670 

1,570 

1,520 

1,570

1,740 

1,910 

1,980 

1,910 

1,840 

1,760

Minimum

340 

326 

288

288

326 

284 

292 

540 

1,150 

951 

411 

288 

292

284

h Computed from staff -gage reading. 

461678 O-42-11

June

1,800 

1,980 

2,120 

2,120 

2,050

1,980 

1,840 

1,760 

1,710 

1,650

1,560 

1,490 

,430 

,400 

,380

,360 

,330 

,290 

1,250 

1,220

1,180 

1,140 

1,080 

1,030 

1,010

969 

951 

951 

969 

987

Mean

362 

358

361

846

347 

302 

384 

746 

1,670 

1,433 

609 

322

607

July

960 

932 

905 

869 

842

797 

797 

761 

726 

700

675 

642 

618 

594 

586

570 

556 

533 

526 

503

489 

476 

462 

435 

423

417 

417 

411 

423 

423 

417

Per 

square 

mile

.560 

.553 

.558

1.31

.536 

.467 

.594 

1.15 

2.58 

2.21 

.941 

.498

.938

Aug.

411 

392 

380 

368 

362

356 

350 

339 

339 

333

339 

327 

321 

315 

310

310 

306 

302 

297 

292

288 

288 

292 

292 

297

292 

288 

292 

302 

306 

297

Sept.

292 

292 

302 

315 

315

32l 

321 

327 

333 

333

333 

339 

350 

362 

386

386 

380 

386 

392 

398

398 

398 

398 

417 

423

423 

455 

483 

469 

483

Runoff

Inches

.65 

.62 

.64

17.80

.62 

.49 

.68 

1.28 

2.97 

2.47 

1.09 

.57

12.78

Acre-feet

22,280 

21, 330 

22^170

614^100

21,330 

16,790 

23,620 

44,370 

102,700 

85,260 

37,460 

19,800

439,300
156 FEND OREILLE RIVER BASIN 

Priest Lake at outlet, near Coolin, Idaho

Location.- Water-stage recorder, lat. 48°29'30", long. 116°53'00", in SEi sec. 5, T. 59 

 N., R. 4 W., half a mile east of outlet and If miles northwest of Coolin. Datum of

gage, 2,435.06 feet (Coast and Geodetic Survey datum) or 2,437.99 feet (Geological

Survey datum), above mean sea level.

Drainage area.- 572 square miles.

Records available.- April 1928 to September 1941. June 1911 to September 1913 (fragmen- 

£a y gage-height records at Coolin) published as part of records for Priest River at 

outlet of Priest Lake, at Coolin.

Extremes.- Maximum gage height during year, 4.15 feet May 20; minimum, 0.07 foot Oct. 17. 

1928-41: Maximum gage height observed, 5.94 feet May 23, 1932; minimum, -0.16 foot 

Nov. 23-25, Dec. 4-6, 1936.

Gage height, in feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

0.14

.15

.13

.14

.14

.13

.12

.12

.10

.11

.10

.12

.12

.11

.11

.10

.10

.12

.11

.12

.13

.14

.16

.22

.28

.32

.33

.35

.38

.43

.47

Nov.

0.48

^49

,50

.50

.50

.50

.52

.55

.60

.58

f.58

-

-

_

-

_

-

_

.

-

f.50

.48

.47

.48

.48

.47

.49

.50

.52

.51

-

Dec.

0.50

.50

.50

.50

.51

.52

.54

.54

.54

.52

.51

.50

.48

.47

.45

.43

.42

.43

.45

.50

.54

.56

.58

.60

.62

.65

.69

.72

.75

.76

.77

Jan.

0.77

.76

.74

.73

.73

.73

.73

.72

.72

.71

.70

.69

.68

.69

.71

.71

.73

.80

.82

.82

.80

.78

.78

.78

.84

.86

.85

.84

.83

 82

 82

Feb.

0.82

.82

.81

.80

.79

.78

.78

.77

.77

.77

.78

.77

.77

.76

.74

.74

.73

.72

.71

.70

.70

.69

.69

.70

.70

.70

.71

.77

_

_

-

Mar.

0.86

.97

1.10

1.19

1.22

1.22

1.22

1.23

1.25

1.27

1.30

1.32

1.33

1.34

1.35

1.35

1.37

1.42

1.47

1.52

1.55

1.58

1.60

1.62

1.64

1.67

1.70

1.74

1.79

1.83

1.98

Apr.

2.09

2.20

2.30

2.38

2.45

2.53

2.61

2.68

2.75

2.82

2.88

2.96

3.04

3.07

3.07

3.07

3.06

3.02

2.98

2.93

2.91'

2.89

2.89

2.90

2.92

2.92

2.95

3.00

3.03

3.07

-

May

3.13

3.26

3.36

3.42

3.45

3.44

3.41

3.38

3.34

3.27

3.20

3.18

3.19

3.25

3.31

3.36

3.64

3.96

4.10

4.13

4.10

4.06

3.99

3.93

3.88

3.82

3.74

3.67

3.62

3.57

3.58

June

3.57

3.52

3.46

3.40

3.33

3.25

3.17

3.12

3.08

3.02

2.95

2.89

2.83

2.77

2.70

2.64

2.58

2.57

2.57

2.56

2.54

2.49

2.44

2.38

2.33

2.31

2.26

2.25

2.23

2.21

-

Jul"

2.18

2.15

2.12

2.07

2.02

1.98

1.93

1.88

1.85

1.81

1.77

1.72

1.67

1.63

1.60

1.56

1.52

1.48

1.45

1.42

1.36

1.31

1.28

1.25

1.22

1.18

1.15

1.12

1.10

1.07

1.03

Aug.

0.99

.96

.94

.92

.90

.88

.85

.83

.81

.79

.77

.76

.76

.75

.73

.71

.69

.68

.65

.64

.62

.61

.60

.60

.58

.58

.60

.60

.60

.58

.57

Sept.

0.57

.57

.57

.59

.62

.63

.64

.63

.66

.73

.78

.81

.84

.87

.92

.95

.98

1.02

1.08

1.15

1.18

1.20

1.21

1.22

1.22

1.22

1.21

1.20

1.18

1.18

-

f Based on partial gage-height record.
PEND OREILLE RIVER BASIN 157

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

Location.- Water-stage recorder, lat. 48°29', long. 116°54', In SWi sec. 5, T. 59 N., 

K. 4 w., at southwest end of Priest Lake, 2 miles northwest of Coolln. Datum of gage 

Is 2,435.06 foot (Coast and Geodetic Survey datum) or 2,437.99 feet (Geological 

Survey datum) above mean sea level.

Drainage area.- 572 square miles.

Records available.- June 1911 to September 1918 (fragmentary); May 1919 to September 1941.

Average discharge.- 27 years (1913-18, 1919-41), 1,066 second-feet.

Extremes.- Maximum discharge during year, 3,920 second-feet May 20 (gage height, 3.53 

feet); minimum, 192 second-feet Oct. 17 (gage height, -0.11 foot).

1911-41: Maximum discharge, 7,290 second-feet May SO, 1917 (gage height, 6.83 feet); 

minimum, 118 second-feet Nov. 25, 1936 (gage height, -0.32 foot).

Remarks.- Records good except those for period of log effect, which, are fair. No 

diversion above station.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

200

202

200

205

205

202

200

197

197

200

197

200

202

200

200

200

200

202

202

202

207

213

213

222

236

252

262

272

280

295

310

Nov.

323

328

328

332

332

332

341

350

369

364

a350

a340

a3SO

a 325

a320

a320

a320

a320

a 320

a320

319

a306

a302

a306

a306

a302

a310

a314

a323

a319

-

Dec.

a314

a314

a314

a314

a319'

a323

a332

a 332

a332

a323

a319

a314

a306

302

a295

a287

a283

295

295

314

328

328

336

345

359

364

385

400

416

416

422

Jan.

416

416

411

405

405

411

411

400

400

400

395

390

390

390

400

400

416

451

462

456

451

445

445

451

481

487

487

481

474

468

462

Month

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

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

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

Calendar year 1940 .........

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

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

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

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

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

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

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

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

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

Water year 1940-41 ..........

Feb.

456

456

462

456

451

445

445

439

439

445

445

445

439

434

434

428

422

422

416

411

411

a405

a 405

411

411

411

416

445

_

-

-

Secondfoot-days

6,775

9 771

10*326

330,456

13,357

12,105

26,096

57,940

94 V90

62 f 070

is) 185

15,854

351, 784

Mar.

474

531

570

604

631

652

680

694

716

737

752

774

782

789

797

804

812

842

881

913

937

961

978

995

1,010

1,040

1,050

1,090

1,130

1,190

1,280

Maximum

310

36£

422

3,670

487

462

1,280

2,430

3,840

3,020

1,450

570

709

3,840

Apr.

1,360

1,470

1,560

1,660

el, 400

el, 200

el, 200

el, 300

(fi.,400

el, 500

ol,600

el, 700

c2,000

e2,200

2,430

2,430

2,360

2,360

2,290

2,220

2,220

2,160

2,160

2,160

2,220

2,220

2,220

2,290

2,290

2,360

-

Hay

2,430

2,640

2,720

2,800

2,870

2,870

2,800

2,800

2,720

2,640

2,570

2,570

2,570

2,640

2,720

2,720

3,100

3,580

3,840

3,840

3,840

3,760

3,670

3,580

3,500

3,420

3,260

3,180

3,100

3,020

3,020

Minimum

197

3Qg

283

197

390

405

474

1,200

2,430

1,470

583

341

336

197

June

3,020

2,940

2,870

2,800

2,720

2,640

2,500

2,430

2,430

2,360

2,290

2,160

2,100

2,030

1,960

1,900

1,840

1,840

1,780

1,780

1,780

1,660

1,640

1,580

1,530

1,530

1,510

1,500

1,430

1,470

-

Mean

219

326

333

903

431

432

842

1 931

3* 058

2,069

952

425

528

964

July

1,450

1,400

1,360

1,320

1,280

1,240

1,200

1,160

1,130

1,090

1,070

1,040

1,010

969

945

921

905

873

842

819

782

752

737

716

709

680

659

645

624

604

583

Per 

square 

mile

0.383

 570

.582

1.58

.753

l!47

3 .38

5.35

3.62

1.66

.743

.923

1.69

Aug.

570

,

550

337

524

518

505

493

481

468

456

445

439

439

434

428

422

105

400

390

380

374

569

559

559

350

350

554

550

550

545

341

Sept.

336

336

336

345

359

364

369

364

380

405

439

456

474

487

518

537

557

577

611

659

673

687

702

709

709

709

708

694

680

680

-

' Runoff

Inches

0 . 44

.64

.67

21.48

 87

nQ fo

1.70

3.77

6«17

4.04

1.91

.86

1.03

22.89

Acre feet

13,440

19, 380

20,480

655,400

26,490

24,010

51,760

114 900

133 * 000

123,100

58,540

26,150

31,450

697,700

a No gage-height record) discharge computed on basis of records for station near Priest River or 

Priest Lake gage heights and stage-relation curve.

c Backwater from logs; discharge computed on basla of record for station near Priest River and 

weather records.
158 PEND OREILLE RIVER BASIN

Priest River near Priest River, Idaho

Location.- Water-stage recorder, lat. 48°13', long. 116°55', In NEi SEi sec. 11,

 T. 56 N., R. 5 W., 500 feet downstream from Saddler Creek, a quarter of a mile downstream from Lower West Branch, 24- miles north of Priest River, and 3i miles upstream 

from mouth.

Drainage area.- 902 square miles.

Records available.- October 1930 to September 1941. June 1903 to April 1905, November

 1910 to April 1911, May to December 1923 and February 1929 to September 1930 at site 

3 miles downstream.

Average discharge.- 11 years (1930-41), 1,462 second-feet.

Extremes.- Maximum discharge during year, 5,100 second-feet May 18 (gage height, 5.69

 feet); minimum, 289 second-feet Oct. 8, 9 (gage height, 0.89 foot).

1903-5, 1910-11, 1923, 1929-41: Maximum discharge, 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.- Records good except those for periods of ice or log effect, which are fair.

 No diversion above station. Some regulation on tributary.

Discharge, In second-feet, water year October 1940 to September 1941

Day

1 

2 

3

4 

5

6

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

310 

315 

324 

33S 

334

315 

302 

293 

293 

297

310 

315 

324 

319 

310

310 

306 

310 

315 

315

324 

329 

334 

388 

490

479 

457 

446 

462 

530 

601

Hov.

565 

524 

501 

484 

479

473 

524 

638 

657 

601

524 

501 

484 

473 

468

46S 

462 

473 

468 

*468

473 

457 

457 

457 

462

457 

473 

490 

501 

496

Dec.

490 

496 

496 

507 

571

632 

595 

565 

536 

512

496 

473 

46S 

b460 

b450

b430 

#b390 

b450 

473 

571

720 

720 

682 

676 

760

814 

786 

760 

740 

727 

714

Jan.

663 

651 

644 

626 

626

626 

620 

614 

601 

595

583 

577 

571 

577 

5S3

5S9 

589 

695 

807 

780

«746 

714 

701 

695 

820

1,010 

926 

862 

814 

780 

753

Month

Oct 

Hov 

Dee

C

Jam 

Fob 

Ken 

Apr 

May 

Jun 

Jul 

Augi 

Sep

W

alendar year 194

ater year 1940-4

Feb.

766 

800 

800 

780 

753

734 

734 

727 

734 

766

807 

800 

780 

740 

714

701 

682 

682 

676 

676

670 

670 

651 

670 

657

651 

657 

897

Secondfoot-days

11,095 

14, 958 

18,160

461,369

21,438 

20,375 

48,630 

78,440 

116, 150 

76, 220 

36,147 

18,034 

21,618

481,365

Mar.

1,200 

1,670 

1,690 

1,670 

1,560

1,500 

1,470 

1,480 

1,520 

1,480

1,450 

1,420 

1,330 

1,350 

1,350

1,340 

1,370 

1,540 

1,650 

1,640

1,630 

1,620 

1,610 

1,600 

1,600

1,620 

1,680 

1,750 

1,800 

1,930 

2,130

Maximum

601 

657 

814

4,540

1,010 

897 

2,130 

3,190 

5,100 

3,300 

1,760 

714 

918

5,100

Apr.

2,230 

2,280 

2,450 

2,560 

2,560

2,080 

2,030 

1,930 

1,980 

2,030

2,150 

2,250 

2,400 

3,150 

3,190*

3,190 

3,190 

c3,100 

03,000 

02,900

c2,800 

02,700 

c2,70O 

C2.700 

02,700

02,700 

c2,800 

02,850 C2.90O03,000

May

c3,100 

C 3,200 

c3,300 

c3,400 

C3, 500

C3,500 

c3,400 

3,370 

3,310 

3,190

3,070 

3,010 

3,070 

3,190 

3,250

3,310 

4,130 

5,100 

4,960 

4,820

4,680 

4,540 

4,400 

4,260 

4,130

4,OOO 

3,870 

3,800 

3,740 

3,680 

3,870

Mlnlimmi

293 

457 

390

281

571 

651 

1,200 

1,930 

3,010 

1,810 

746 

507 

507

293

June

3,800 

3,610 

3,490 

3,370 

3,250

3,190 

3,070 

3,010 

3,010 

2,S90

2,780 

2,670 

2,560 

2,450 

2,400

2,280 

2,230 

2,230 

2,280 

2,230

2,180 

2,130 

2,050 

1,980 

1,S80

1,380 

1,820 

1,830 

1,380 

1,810

Mean

358 

499 

586

1,261

692 

728 

1,570 

2,615 

3,747 

2,541 

1,166 

583 

721

1,3J9

July

1,760 

1,710 

1,670 

1,620 

1,570

1,520 

1,490 

1,420 

1,370 

1,330

1,290 

1,260 

1,220 

1,180 

1,150

1,110 

1,070 

1,040 

1,040 

1,010

 969 

926 

904 

876 

862

841 

827 

807 

793 

766 

746

Per 

square

mile.

0.397 

.553 

.650

1.40

.767 

.807 

1.74 

2.90 

4.15 

2 «8£ 

1^29 

.646 

.799

1.46

Aug.

714 

695 

688 

688 

663

651 

632 

620 

60S 

595

589 

595 

595 

589 

583

571 

553 

536 

524 

512

507 

507 

507 

553 

524

512 

571 

595 

559 

530 

518

Sept,

507 

518 

542 

571 

559

548 

559 

542 

559 

633

727 

688 

676 

676 

714

720 

720 

746 

800 

883

918 

897 

890 

876 

876

876 

862 

848 

834 

848

Runoff

Inches

0.46 

.62 

.75

19.02

.88 

.84 

2.01 

3.24 

4.78 

3.15 

1.49 

.74 

.89

19.85

Acre-feet

22,010 

29, 670 

36,020

915,100

42,520 

40,410 

96, 560 

155,600 

230,400 

151,200 

71,700 

35,870 

42,880

954, 800

« Winter discharge measurement made on this day. 

b Stage-discharge relation affected by Ice.

c Backwater from logs; discharge computed on basis of one discharge measurement and records for 

station near Coolln.
PEND OREILLE RIVER BASIN 159

Salmon River near Waneta, British Columbia

Location.- Staff gage, lat. 49°01'30", long. 117°22'30", three-quarters of a mile up-

 stream from mouth and 15 miles upstream from Waneta.

Records available.- March 1936 to September 1941.

Extremes.- Maximum discharge observed during year, 6,820 second-feet May 18 (gage height,

 15.38"feet); minimum dally discharge, 127 second-feet Dec. 14, 15 (occurred during

Peri936-41: Maximum discharge observed, 9,060 second-feet May 26, 1938 (gage height, 

14.55 feet); minimum, 78 second-feet Feb. 19, 1937 (result of discharge measurement 

during period of Ice effect); discharge may have been less sometime during periods or 

Ice effect.

Remarks.- Records good except those for period of ice effect, which are poor. Gage read 

twice daily.

Cooperation.- Complete record furnished by Dominion Water and Power Bureau, Department

 of Mines and Resources, Canada. Some discharge measurements made by the U. S. Geological Survey.

Rating table, water year 1940-41, except period of ice effect (gage height, in 

feet, and discharge, in second-feet)

2.2 122 3.5 470

2.4 159 4.0 645

2.6 204 4.5 835

2.9 281 5.0 1,040

3.2 370 6.0 1,540

7.0 2.100

8.

9.

10.

3 2,770

3 3,570

5 4,460

12.0 6,400

Discharge, In second-feet, water year October 1940

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

172

246

186

1SS

166

172

163

155

151

172

223

306

270

249

228

216

209

214

221

216

a241

a266

292

316

935

715

589

526

491

533

526

Nov.

491

442

426

409

383

373

*376

396

380

330

276

216

211

292

321

273

268

298

233

226

265

259

246

259

246

244

254

246

246

246

~

Dec.

301

241

236

246

259

298

265

254

259

216

141

b!34

b!30

1)127

b!27

b!40

1)174

D223

a245

268

330

351

392

345

345

345

34S

330

333

330

327

Jan.

315

295

186

2S7

287

265

270

276

270

273

265

259

265

259

265

262

262

268

289

276

236

211

265

259

259

270

273

262

259

246

249

Feb.

2t9

270

*276

273

262

268

273

281

287

2S7

293

295

292

273

190

190

193

190

211

287

276

276

268

281

281

273

295

364

_

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

554

827

647

823

803

7S7

803

823

891

807

867

863

863

811

795

783

835

1,100

1,150

1,150

1,120

*1,110

1,060

1,040

1,100

1,200

1,850

1,370

1,540

1,730

2,230

Apr.

2

2

2

2

1

1

1

1

1

,560

,520

,320

,110

,990

,910

,880

,820

.920

2,010

2.150

2

2

2

,360

,500

.430

2^480

2.270

£

1

1

1

,040

,S60

,770

,740

1.860

£

£

,110

,230

.430

2^480

2.500

£

£

£

£

Secondfoot-days

9,575

9,133

8,060

337,062

8,183

7,469

31,932

66,S10

99,610

52,260

24,985

9,392

32,100

359,509

,630

,740

,830

,360

to September 1941

May

3,740

4,32

3,88

4,03

0

0

0

2,830

2,500

2,32

2,05

1,93

0

0

0

1,640

1,970

2,69

3,47

3,88

0

0

0

3,720

3,670

6,18

6,82

4,12

0

0

0

3,630

3,070

2,97

2,81

2,93

0

0

0

2,910

2,910

2,57

2,3E

2,42

2,36

0

0

0

0

2,690

Maximum

935

491

392

6,190

315

364

2,230

2,830

6,820

2,740

1,630

442

1,870

6,820

June

2,740

2,430

2,170

2,070

1,930

1,870

1,760

1,810

1,790

1,640

1,560

1,520

1,560

1,480

1,310

1,300

1,260

1,390

1,660

2,270

2,040

1,760

1,660

1,520

1,4SO

1,960

1,650

1,560

1,500

1,610

-

Minimum

151

211

127

119

186

190

554

1,740

1,840

1,260

372

218

376

127

July

1,630

1,520

1,410

1,520

1,3SO

1,260

1,160

1,110

1,010

939

833

S59

787

723

690

645

645

662

57S

589

554

512

477

477

491

460

423

412

412

3S9

373

Aug.

348

327

364

389

351

333

312

298

287

276

265

270

31S

298

270

265

Mean

309

304

260

921

264

267

1,030

2,230

3,210

1,740

806

303

1,070

985

249

249

233

226

223

218

257

345

273

265

298

442

402

345

402

Sept.

376

505

634

470

719

631

614

592

540

662

1,080

1,060

1,170

1,370

1,490

1,360

1,390

1,330

1,540

1,660

1,600

1,480

1,470

1,340

1,210

1,140

1,110

987

1,020

1,050

~

Runoff in 

acre-feet

18,990

18,110

15,990

668,500

16,230

14,810

63,340

132,500

197,600

103,700

49,560

18,630

63,670

713,100

* Winter discharge measurement made on this day. 

a Ho gage-heiglit record; discharge Interpolated, 

b Stage-discharge relation affected by ice.
160 SHEEP CREEK BASIN

Sheep Creek near Northport, Wash.

Location.- Water-stage recorder, lat. 48°56'40", long. 117°46'40", in NEiNEi sec. 25, T. 

40 N., R. 39 E., at county highway bridge, 1 mile upstream from mouth and li miles 

north of Northport. Datum of gage is 1,300 feet above mean sea level, subject to 

correction to datum of 1929.

Drainage area.- 225 square miles.

Records available.- June 1929 to September 1941.

Average discharge.- 12 years, 211 second-feet.

Extremes.- Maximum discharge during year, 1,540 second-feet (regulated) Hay 18 (gage 

height, 26.27 feet), from rating curve extended above 1,200 Second-feet; minimum, 21 

second-feet (regulated) Oct. 24 (gage height, 22.58 feet).

1929-41: Maximum discharge, 2,450 second-feet Apr. 29, 1933 (gage height, 27.46 

feet), from rating curve extended-above 1,200 second-feet; minimum not determined, 

probably less than 8 second-feet sometime during period of ice effect, Dec. 25, 1929, 

to Apr. 7, 1930.

Remarks.- Records good except those for period of ice effect, which are poor. Flow partly 

regulated by flash dam 6i miles upstream occasionally used for logging operations. No 

diversion.

Rating table ; wate year 1940-41. except period of ice effect (gage height, In feet, and 

discharge, In second-feet)

22.6 22 24.0 283 

22.S 37 24.3 385 

23.0 61 24.6 513 

23.2 93 25.0 705 

23.4 130 25.5 l.OOO 

23.7 199 26.0 1,350

Discharge, in second-feet, water year October 1940 to September

Daj

1 

2 

3 

4 

5

6

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

2S 

29 

30 

31

Oct.

30 

34 

33 

31 

29

28 

28 

28 

27 

29

29 

33 

30 

30 

29

27 

27 

27 

27 

27

30 

29 

29 

31 

47

49 

48 

53 

*60 

61 

64

Nov.

69 

73

78 

81 

S3

83 

84 

36 

86 

86

86 

86 

84 

84 

83

79 

76 

76 

75 

72

69 

69 

66 

64 

63

61 

60 

59 

57 

57

Dec.

57 

57 

56 

56 

59

59 

57 

' 57 

57 

53

47 

41 

34 

30 

28

27 

28 

30 

31 

34

35 

39 

44 

50 

59

64 

72 

76 

81 

83 

79

Jan.

72 

67 

66 

66 

67

69 

69 

67 

67 

66

66 

66 

66 

67 

67

69 

70 

72 

72

72

*72 

72 

72 

73 

73

73 

75 

75 

75 

75 

75

Month fS«

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 1940 

ary

st ................. . . ...

ember .....................

Feb.

76 

79 

79 

79 

78

78 

78 

78 

79 

81

S4 

86 

84 

84 

84

84 

84 

84 

S64 

88

88 

88 

88 

90 

90

90 

91

111

ond 

-days

1,064 

2,235 

1,580

83,261

2,173 

2,367 

16,202 

28,235 

25,516 

13,670 

6,538 

1,993 

5,207

ter year 1940-41 .......... 106,800

Mar.

165 

240 

341 

393 

405

417 

434 

472 

504 

504

482 

468 

442 

421 

405

405 

429 

513 

597 

621

606 

601 

564 

545 

550

582 

640 

705 

705 

906 

1,140

Maximum

64 

86 

83

1,500

75 

111 

1,140 

1,310 

1,420 

705 

425 

81 

295

1,420

Apr.

1,280 

1,310 

1,280 

1,170 

1,100

1,000 

938 

906 

875 

875

938 

1,040 

al ,040 

al ,040 

1,040

1,040 

938 

845 

732 

705

705 

705 

758 

815 

845

845 

845 

875 

875 

875

May

970 

1,210 

1,210 

1,070 

1,000

845 

732 

635 

597 

545

504 

527 

655 

906 

1,140

1,140 

1,210 

1,420 

1,210 

1,040

906 

815 

705 

680 

640

611 

568 

516 

504 

490 

513

Minimum

27 

57 

27

20

66 

76 

165 

705 

490 

328 

83 

46 

63

27

June

554 

545 

541 

429 

409

401 

401 

401 

409 

397

364 

345 

331 

328 

345

348 

355 

374 

500

518

705 

680 

616 

550 

504

508 

518 

472 

425 

397

Mean

35.0 

74.5

51.0

227

70.1 

84.5 

523 

941 

823 

456 

211 

64.3 

174

293

1941

July

425 

417 

385 

3S5 

381

363 

331 

295 

286 

260

246 

237 

221 

189 

184

179 

167 

156 

147 

147

124

102 

115 

115 

111

107 

102 

97 

93 

88 

83

Per 

square 

mile

0.156 

.331 

.227

1.01

.312 

.376 

2.32 

4.18 

3.66 

2.03 

.938 

.286 

.773

1.30

Aug.

81 

78 

78 

78 

76

75 

72 

70 

69 

66

64 

64 

64 

63 

64

63 

60 

59 

50 

46

61 

56 

54 

54 

53

53 

64 

66 

64 

64 

64

Sept.

63 

63 

64 

66 

69

72 

72 

69 

70 

84

117 

156 

176 

186 

212

221 

21S 

215 

246 

283

292 

295 

283 

268 

254

243 

229 

218 

207 

196

Runoff

Inches

0.18 

.37 

.26

13.76

.36 

.39 

2.68 

4.67 

4.22 

2.26 

1.08 

.33 

.86

17.66

Acre-feet

2,150 

4,430 

3,130

165,100

4,310 

4,690 

32,140 

56 ,000 

50,610 

27,110 

12,970 

3,950 

10,330

211.80O

* Winter-discharge measurement made on this day. 

a Ho gage-height record; discharge interpolated. 

Note.- Stage-discharge relation affected by Ice, Nov. 13 to Jan. 30.
KETTLE RIVER BASIN 161

Kettle River near Ferry, Wash. 

(International gaging station)

Location.- Water-stage recorder, lat. 48°58'40", long. 118°46'10", in lot 7, sec. 10, T. 

40 N., R. 32 E., li miles south of international boundary and Ferry and 3 miles upstream from Toroda Creek. Datum of gage is 1,840.00 feet above mean sea level (subject 

to correction for datum of 1929).

Drainage area.- 2,220 square miles.

Kecoras available.- August 1928 to September 1941.

Average discharge.- 13 years, 1,286 second-feet.

Extremes.- Maximum discharge during year, 9,310 second-feet May 2 (gage height, 16.38 

feet); minimum not determined (occurred during period of ice effect).

1928-41: Maximum discharge, 14,000 second-feet June 17, 1933 (gage height, 18.4 

feet); minimum, 14 second-feet (discharge measurement) Jan. 23, 1930, but may have 

been less during period of Ice effect, Jan. 18-23, 1930.

Remarks.- Records excellent except those for period of shifting control, which are good, 

ana those for periods of ice effect and no gage-height record, which are poor. Several 

small diversions above station for irrigation.

Cooperation.- This station is one of the international gaging stations maintained by the 

united states under agreement with Canada.

Bating table, water year 1940-41, except during periods of ice effect (gage height, 

in feet, and discharge, in second-feet) 

(Shifting-control method used Oct. 1-16}

9.3 38 10.3 416 12.0

9.5 85 10.6 5SB 12.5

9.7 149 11.0 870 13.0

10.0 269 11.5 1,330 14.0

1,860 15.0 6,440

2,450 16.0 8,450

3,120

4,660

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

125

122

112

122

132

132

122

115

112

112

109

115

,129

142

135

132

125

122

118

118

118

125

129

*171

«243

395

416

359

335

320

310

Nov.

292

283

283

269

256

248

239

248

243

£18

160

135

1)120

t!25

1)130

tl40

t!45

bl50

t!45

tl40

t!35

tl30

149

171

171

175

179

175

171

171

-

Dec.

168

171

171

175

179

175

171

171 tiso

t!30

t90

t60

t70

t85 tioo

t!05

tno

125

139

142

153

171

164

168

182

186

194

194

194

194

186

Jan.

b!75

b!55 tiso

tl35

142

149

156

160

164

164

164

160

160

164

153

*160

160

164

164

16S

16S

153

149

156

160

160

160

156

149

146

135

Feb.

149

160

160

156

153

145

132

139

149

153

156

156

149

tl40

tllO

tlOO

10.05

till5

t!30

t>14O

b!60

t>135

b!20

b!20

tl30

t!50

164

171

_

-

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

Maw May. .......................................

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

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

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

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

Water year 1940-41. ......................

Mar.

210

269

364

411

444

477

494

540

576

570

570

582

576

582

582

607

«664

798

1,010

1,120

1,120

1,120

1,130

1,140

1,170

1.300

1,640

2,030

2,270

2,640

3,050

Apr.

3

3

3

3

3

3

3

3

3

3

3

4

4

3

4

4

3

3

3

2

2

3

3

3

3

4

4

4

4

5

Secondfcot-days

5,372

5,596

4,673

437,183

4,839

3,947

30,056

112,390

156,030

106,110

54,772

14,867

58,220

556J872

,260

,560

,710

,780

,640

,560

,340

,190

,340

,560

,860

,100

,100

,940

,100

,100

,640

,260

,050

,910

,980

,190

,560

,780

,940

,100

,340

,5OO

,830

,170

May

6,630

8,870

8,450

7,820

6,630

5,880

5,170

4,500

4,100

3,710

3,710

4,340

6,060

5,380

5,700

5,170

5,880

6,060

5,000

4,180

3,860

3,780

3,560

3,860

4,100

4,020

3,710

3,640

3,710

3,710

4,340

Maximum

416

292

194

9 SSO

175

171

3,050

5,170

8,870

5,170

3,640

820

3,750

8,370

June

5,170

4,830

4,100

3,640

3,260

3,190

3,780

4,660

5,000

4,180

3,640

3,340

3,260

3,640

3,260

3,050

2,910

3,050

3,480

4,340

4,180

3,640

3,190

2,84O

2,780

3,120

2,910

2,580

2,450

2,640

Minimum

109

120

60

30

130

100

210

2,910

3,560

2,450

645

315

700

60

July

3,120

3,050

3,190

3,410

3,640

3,260

2,910

2,980

2,580

2,270

2,090

1-,920

1,750

1,580

1,480

1,380

1,250

1,150

1,070

1,060

1,060

1,000

930

921

991

964

870

806

747

698

645

Aug.

613

588

376

382

588

576

346

511

188

454

422

422

416

406

406

411

400

5S5

565

344

330

.

520

515

530

364

a 440

a

a

a

a

460

530

700

320

a760

Mean

173

187

151

1,194

156

141

970

3,746

5,033

3,537

1,767

480

1,941

1,526

Sept.

a700

aSOO

a880

aSBO

a980

al,000

a970

a920

a900

a940

1,640

a2,160

- a2,260

a2,300

a2,350

2,390

a2,650

a3, 750

a3,150

a3,100

2,980

2,710

2,520

2,390

2,270

2,150

2,210

2,150

2,090

2,030

Runoff in 

acre feet

10,660

11,100

9,270

867,200

9,600

7,830

59, 620

222,900

309,500

210,500

108, 600

29,490

115,500

1,105,000

* Winter discharge measurement made on this day.

a Bo gage-height record; discharge computed on basis of one discharge measurement and records for 

station near Laurier.

h Stage-discharge relation affected hy ice.
162 KETTLE RIVER BASIN

Kettle River near Laurler, Wash. 

(International gaging station)

Location.- Water-stage recorder, lat. 48°50'50", long. 118 013'00", In SWi sec. 11, T. 

40 N., R. 36 E., 500 feet downstream from Deep Creek, 14 miles southeast of Laurler, 

and 12 miles upstream from Boulder Creek.

Drainage area.- 3,800 square miles.

Records available.- September 1929 to September 1941.

Average discharge.- 12 years, 2,548 second-feet.

Extremes.- Maximum discharge during year, 15,700 second-feet May 3 (gage height, 11.80

feet); minimum, 197 second-feet Oct. 1 (gage height, 2.60 feet).

1929-41: Maximum discharge, 23,800 second-feet June 17, 1933 (gage height, 14.48

feet); minimum not determined (probably occurred during winter of 1929-30).

Maximum stage known, about 22 feet sometime In May or June 1894, from Information

furnished by local residents.

Remarks.- Records excellent except those for periods of Ice effect, which are poor, and 

 those for periods of no gage-height record, which are fair. North Fork regulated by

reservoir at Grand Forks, British Columbia. Numerous small diversions for Irrigation

and domestic supply. 

Cooperation.- This station Is one of the International gaging stations maintained by the

United states under agreement with Canada.

gating table, water year 1940-41, except periods of ice effect (gage 

height, in feet, and discharge, in second-feet)

2.S 277 4.5 1,340

3.0 365 5.0 1,810

3.3 512 5.5 2,360

3.6 680 6.0 3,000

4.0 942 7.0 4,520

8.0 6,370

9.0 8,520

10.0 10,900

11.0 13,500

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

220

224

232

220

240

224

232

232

228

869

290

277

281

281

290

294

294

294

290

290

286

281

281

303

316

*356

616

625

812

792

767

Nov.

754

741

723

692

663

639

639

639

639

611

497

b410

b360

b370

b380

b390

MOO

b420

b400

b380

b380

b380

432

441

456

451

476

481

476

461

-

Dec.

456

451

446

451

451

451

446

441

441

393

342

D320

b300

b290

b280

b310

b360

b410

471

497

512

534

539

572

572

555

583

572

577

577

566

Jan.

517

b470

b440

b430

b450

a460

a470

a480

a 480

a490

a480

476

481

481

502

497

507

*502

507

512

497

481

480

486

507

517

507

507

497

481

471

Feb.

481

507

b510

b500

b480

b450

b430

412

461

507

523

528

528

523

471

446

441

461

476

497

523

550

528

492

517

528

550

583

_

-

Month

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

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

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

Calendar year 1940 ......................

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

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

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

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

663

652

2,120

2,070

1,760

1,760

1,760

1,910

2,130

2,180

2,130

2,070

2,070

2,070

2,020

2,020

2,070

*2,360

3,070

3,420

3,420

3,280

3,280

3,210

3,210

3,420

3,940

4,860

5,400

5,970

6,990

Apr.

7.630

E

£

£

£

£

a.'

B.'

'

,070

1,520

1,520

i,070

1,070

',600

',200

',200

7,630

3,070

£

£

£

£

£

£

1,750

1,980

1,520

1,520

1,750

1,520

7,200

5,780

6,370

6/370

r

£

£

£

£

!

Secondfoot-days

10,837

15,181

14,166

901,973

15,063

13,903

87,485

239,960

288,430

196,340

97,980

30,945

113,180

1,123,470

3,570

7,200

7,850

1,070

3,290

3,520

3,980

J.210

9,950

~

May

11,200

14,300

15,200

14,100

12,500

10,700

9,450

8,290

7,630

6,990

6,570

7,200

9,690

11,200

10,700

9,930

10,700

12,200

10,400

8,750

7,850

7,200

6,990

6,990

7,850

7,850

7,410

7,200

6,990

6,990

7,410

Maximum

825

754

583

16,900

517

583

6,990

9,930

15,200

8,980

5,970

1,810

6,370

15,200

June

8,980

8,980

8,070

7,200

6,570

6,170

6,570

7,410

8,290

7,630

6,780

6,170

6,170

6,370

6,370

5,780

5,590

5,590

5,970

7,200

7,630

6,990

6,370

5,780

5,590

5,590

5,590

5,220

4,860

4,860

~

Minimum

220

360

280

193

430

412

663

6,370

6,570

4,860

1,340

692

1,470

220

July

5,220

5,220

5,400

5,590

5,970

5,780

5,220

5,040

4.690

4,190

3,870

3,570

3,350

3,140

2,860

2,240

2,070

1,960

1,960

2,020

2,020

1,960

1,860

1,760

1,760

1,760

1,660

1,560

1,520

1,420

1,340

Aug.

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

Mean

350

506

457

2,464

486

497

2,822

7,999

9,304

6,545

3,161

998

3,773

3,078

250

210

170

130

130

130

090

050

020

942

907

865

852

832

786

786

767

754

741

729

710

692

729

872

852

907

942

090

590

810

610

Sept.

1,470

1,610

1,810

1,810

1,960

2,020

1,910

1,860

1,810

1,860

2,600

4,190

4,520

4,520

5,040

5,040

5,220

6,370

5,970

5,970

5,970

5,400

5,040

4,690

4,520

4,190

4,190

4,030

3,870

3,720

"

Runoff in 

acre-feet

21,490

30,110

28,100

1,789,000

29,880

27,580

173,500

476,000

572, 100

389,400

194,300

61,380

224,500

2,228,000

* Winter discharge measurement made on this day.

a Ho gage-height record; discharge computed on basis of records for station near Perry.

b Stage-discharge relation affected by ice.
KETTLE RIVER BASIN 163

Myers Creek near Myncaster, British Columbia 

(International gaging station)

Location.- Water-stage recorder and 4-foot Cippoletti weir, lat. 49°00 1 0011 , long. 119°01'

 15", 50 feet north of international boundary, a quarter of a mile south of Myncaster, 

British Columbia, and 4i miles downstream from Mary Ann Creek.

Drainage area.- 80 square miles.

Records available.- October 1929 to September 1941 (fragmentary), in water-supply papers

 of Geological Survey. May 1923 to September 1929, in bulletins of Dominion Water and 

Power Bureau, Department of Mines and Resources, Canada.

Extremes.- Maximum discharge recorded during period Aug. 13 to Sept. 30, 21.3 second-

 feet Aug. 27 (gage height, 2.54 feet); minimum, 6.5 second-feet Aug. 20 (gage height, 

1.80 feet).

19E3-41: Maximum discharge recorded, 99 second-feet June 14, 1923; no flow July 

16-18, 25, 1926, Aug. 13-25, 1939.

Remarks.- Records good. Diversions above station for irrigation. Record published only 

for period when weir was in place.

Cooperation.- This station is one of the international gaging stations maintained by 

Canada under agreement with the United States.

Discharge, in aecond-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4

e

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

IS 

19 

20

21 

22 

23

24 

25

26 

27 

28 

29 

30 

31

Oct. Nov. Dec. Jan. Feb.

Month

Oct 

Hen 

Dec

C

Jar 

Pel 

Mai 

Api 

Maj 

Jui 

Ju] 

Auj 

Sei

1

alendar year

Tist.13-2

'he peric

Mar. Apr.

Secondfoot-daya

191.0 

394.8

-

May

Maximum

19.9 

20.6

-

June July

Minimum

6.6

10.0

-

Aug.

9.0 

8.4

7.6

7.9 

7.3 

7.1 

6.8 

6.6

6.6

7.1 

7.3 

7.6 

7.0

13.7 

19.9 

19.2 

16.7 

13.5 

11.7

Mean

10.1 

13.2

-

Sept.

11.0 

11.0 

11.4 

11.7 

10.4

10.0 

10.6 

11.0 

U.O 

11.9

15.2 

,14.8 

15.0 

13.9 

14. S

13.1 

12.1 

11.9 

16.9 

20.6

17.6 

15.6 

14.6 

13.9 

13.3

12.5 

12.1 

12.5 

12.3 

12.1

Runoff in 

acre-feet

379 

783

1,160
164 COLVILLE RIVER BASIN

Colville River at Kettle Falls, Wash.

Location.-Staff gage, lat. 48°36', long. 118°04', in sec. 29, T. 36 N., R. 38 E., 500 

feet downstream from Stevens County Light & Power Co.'s plant at foot of Meyers Falls, 

half a mile south of town of Kettle Falls, and 5 miles upstream from mouth.

Records available.- October 1922 to September 1941._ 

Average discharge.- 19 years, 238 second-feet.

Extremes.- Maximum discharge observed during year, 880 second-feet Mar. 10, 11, 13

(gage height, 7.30 feet); minimum observed, 26 second-feet Aug. 21 (gage height, 4.48 

feet).

1922-41: Maximum discharge observed, 2,720 second-feet Apr. 20, 1938; minimum 

observed, 0.5 second-foot Aug. 15, 1930.

Remarks.- Records fair except those for periods of ice effect, which are poor. Gage read 

twice daily. Several ditches divert water above station for irrigation. Slight 

regulation for power by small reservoir above falls.

Cooperation.- Gage-height record and three discharge measurements furnished by Washington 

water Power Co.

Rating table, water year 1940-41, except periods of lee effect (gage height, in feet,

and discharge, in second-feet) 

(Shifting-control method used Oct. 1-28, Nov. 6-18)

4.5 27 5.7 229

4.7 43 6

4.9 66 6

5.1 96 7

5.4 154

.0 320

.5 505

.0 730

Discharge, in second-feet, water year October 1940 to September 194!

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

112

108

110

116

110

110

99

106

98

78

89

94

99

99

77

91

88

94

93

82

94

94

105

106

131

127

144

144

144

144.

154

Nov.

166

#177

177

166

154

154

*177

154

166

170

165

120

105

105

110

110

119

144

125

#125

115

100

115

145

160

154

133

144

133

133

-

Dec.

133

133

144

144

154

154

154

154

150

130

30

40

50

50

55

55

50

50

60

70

140

200

220

244

273

288

288

304

304

288

295

Jan.

285

260

215

195

190

185

190

215

190

202

202

177

202

202

190

216

190

202

258

258

273

273

288

288

288

320

320

#320

354

354

372

Feb.

372

372

372

372

337

337

354

337

337

354

372

354

372

372

354

354

354

354

354

320

320

304

304

288

288

288

288

337

_

_

-

Month

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

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

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

Calendar year 1940 ...................

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

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

March. ..................................:..

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

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

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

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

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

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

Water year 1940-41 ......................

Mar.

389

485

591

682

636

682

730

730

829

880

829

829

829

779

779

730

682

730

730

730

730

730

730

682

682

730

682

682

730

730

779

Apr.

Secondfoot-days

3,340

4,221

4,804

91,637

7,674

9,521

22,168

19,095

13,470

11,155

4,966

3,187

5,516

109,117

779

779

779

829

829

S29

779

779

779

730

730

730

730

682

682

636

636

636

591

547

526

505

505

485

465

446

446

446

408

372

-

May

408

426

426

426

426

426

426

408

408

408

389

389

389

408

408

426

426

485

526

526

505

505

485

465

465

446

389

408

408

408

426

Maximum

154

177

304

1,450

372

372

880

829

526

465

304

202

229

880

June

446

465

446

446

446

426

426

426

426

408

408

408

389

372

372

337

337

337

354

389

354

320

337

304

288

304

288

288

304

304

-

Minimum

T

10(

3(

3(

17'

28!

38

37

38

28!

T

3

10

3

July

304

288

288

273

258

229

229

202

202

190

177

177

177

177

177

123

121

117

125

125

119

93

103

77

91

96

83

80

83

86

96

Aug.

77

80

78

86

96

96

93

89

L12

106

53

73

L17

L25

48

123

74

61

66

110

39

L06

99

99

112

]

'

77

L33

L90

202

L90

177

Mean

1 108

3 141

 > 155

) 250

7 248

3 340

3 715

3 636

3 435

3 372

r 160

3 103

5 184

3 299

Sept.

144

177

103

202

190

177

177

177

117

177

190

202

190

190

190

190

190

177

202

216

229

216

216

202

190

177

177

177

177

177

-

Runoff in 

acre feet

6,620

8,370

9,530

181 ,800

15,220

18 ,880

43,970

37 ,870

26 ,720

22,130

9,850

6,320

10 ,940

216 ,400

* Winter-discharge measurement made on this day.

Hote.- Stage-discharge relation affected by ice HOT. 10-16, 20-25, Dec. 9-23, Dee. 31 to Jan. 8.
COLVILLE RIVER BASIN 

Mill Creek near Colvllle, Wash.

165

.Location.- Water-stage recorder, lat. 48°34'55", long. 117051'00", In lot 3, NWi sec. 35, 

T736N., R. 39 E., 3 miles northeast of Colville and 5 miles downstream from North 

Fork. Datum of gage is 1,964.3 feet above mean sea level (Stevens County bench mark, 

subject to correction to datum of 1929).

Drainage area.- 82 square miles.

Records available.- February 1940 to September 1941.

Extremes.- Maximum discharge during year, 222 second-feet Mar. 2 (gage height, 3.68 

reet); minimum, 7.2 second-feet Dec. 16 (gage height, 1.80 feet).

1940-41: Maximum discharge, 454 second-feet Mar. 27, 1940 (gage height, 4.55 feet)- 

minimum recorded, 3.6 second-feet Aug. 28, 31, Sept. 1, 1940 (gage height, 1.69'feet), 

but stage and discharge may have been less sometime during period of no gage-height 

record, Feb. 1-4, 1940.

Remarks.- Records good. Some diversion for irrigation above gage. No regulation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet) 

(Shifting-control method used Oct. 51 to HOT. 4)

Oct. 1 to Bar, 2 Mar, 3 to Sept, 30

1.9 

2.1 

2,4

2»7 

5.0 

3,5

75

109

187

1.9 

2.1

2.4

12

22

41

2.7 

5.0 

3,5

68

103

181

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

18

17

12

12

12

10

10

10

10

10

10

10

12

12

11

11

11

11

11

11

14

16

14

20

29

22

18

17

18

23

28

Nov.

21

18

17

16

16

14

16

21

19

17

14

12

12

15

12

12

12

12

12

12

12

12

12

12

12

12

12

12

12

12

-

Dec.

11

11

12

12

14

16

14

14

16

12

11

9.2

9.2

S.4

S.O

7.6

7.6

S.O

9.2

16

26

2S

27

26

32

32

51

28

26

24

25

Jan.

21

20

16

18

20

19

18

IS

18

18

17

18

17

17

17

16

16

18

25

21

19

19

IS

18

20

26

23

22

20

20

20

Month

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

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

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

Calendar year .........

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

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

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

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

May

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

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

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

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

Water year 1940-41 ..........

Feb.

20

23

25

22

21

21

21

21

21

23

26

25

21

23

22

21

21

23

24

24

24

24

25

24

23

25

25

41

_

_

-

Secondfoot-days

450

418

628.2

589

651

4,110

3,582

2,442

1,908

960

550

6S7

16,875.2

Mar.

102

192

174

142

12S

121

122

133

151

122

118

112

106

101

97

97

111

141

147

144

156

154

126

124

124

131

142

145

150

167

190

Maximum

29

21

26

41

192

183

122

96

49

£8

36

192

Apr.

181

178

183

1S1

171

161

149

142

139

144

136

154

188

122

117

114

110

105

100

96

91

89

86

82

a80

a7S

a75

a73

71

68

-

May

77

81

76

76

75

70

68

68

66

61

58

58

60

78

75

76

112

122

107

100

94

89

84

81

78

74

74

72

73

75

88

Minimum

10

12

7.6

16

20

68

58

48

21

15

18

7.6

June

96

80

74

70

68

68

72

77

80

70

66

61

68

56

56

56

58

63

78

a71

a64

B56

49

48

56

56

49

48

54

62

-

Mean

14.5

13 9

17!o

19.0

23.2

133

119

78. S

65.6

31.0

17.7

22.9

46.2

July

49

49

44

44

42

40

38

57

56

34

33

55

52

51

29

28

27

28

27

26

26

24

24

24

24

23

22

22

22

21

21

Per 

square 

mile

0.177

.170

.207

.232

.283

1.62

1.45

.961

.776

.37S

.216

.279

.583

Aug.

20'

20

21

22

20

18

17

15

15

14

14

15

18

17

16

16

15

15

14

14

15

13

16

16

16

20

26

88

26

21

19

Sept.

19

1922'

24

21

19

19

18

20

26

27

24

23

22

22

a22

a22

22

33

36

31

27

25

22

21

21

20

20

30

20

""

Runoff

Inches

0.20

'.24 19

.27

.30

1.86

1.62

1.11

.87

.44

 25 !si

7.66

Acre-feet

895 n__

1,050

""

1,170

1,290

8,150

7,100

4,840

3,780

1,900

1 *090

1,360

33 ,450

a No gage-height record; discharge Interpolated.
166 SPOKANE RIVER BASIN 

Coeur d'Alene River at Enaville, Idaho

Location.- Water-stage recorder, lat. 47°34', long. 116°15', in IJWi sec. 30, T. 49 N., R. 

2 E., 800 feet upstream from highway bridge, a quarter of a mile northwest of Enaville 

post office, 1.1 miles upstream from South Fork of Coeur d'Alene River, and 3.5 miles 

downstream from North Fork of Coeur d'Alene River. Datum of gage is 2,100.00 feet 

above mean sea level.

Drainage area.- 895 square miles.

Records available.- October 1939 to September 1941. March 1911 to April 1913 (fragmentary 

records collected at site a quarter of a mile downstream and published as North Fork of 

Coeur d'Alene River at Enaville).

Extremes.- Maximum discharge during year, 5,800 second-feet May 18 (gage height, 65.96 

feet); minimum, 185 second-feet Oct. 20, 21 (gage height, 60.69 feet).

1939-41: Maximum discharge, 10,000 second-feet Mar. 28, 1940 (gage height, 68.13 

feet), from rating curve extended above 8,000 second-feet; minimum 160 second-feet Aug. 

26, 27, Sept. 3, 4, 1940 (gage height, 60.55 feet).

From local information obtained concerning high-water marks, the flood in December 

1933 reached a stage of 79.47 feet and that in April 1938 a stage of 78.16 feet.

Remarks.- Records good. No appreciable diversions or regulation above station.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

Oct. 1 to May 18

60.7 187 62.5 1,140

61.0 263 63.0 1,580

61.3 375 64.0 2,680

61.6 525 65.0 4,100

62.0 775 66.0 5,800

May 19 to Sept. 

60.8 240 62.0 

61.1 331 62.5 

61.5 518 63.0

30

825 

1,200 

1,620

Note.- Same as preceding 

table above 63.5 feet.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 '25

26 

27 

28 

29 

30 

31

Oct.

205 

214 

229 

246 

246

237 

219 

207 

198 

194

198 

209 

205 

205 

202

200 

196 

191 

189 

185

191 

196 

196 

202 

251

307 

329 

323 

314 

337 

430

Nov.

508 

481 

465 

425 

375

337 

318 

420 

537 

492

411 

346 

289 

260 

260

260 

248 

248 

243 

237

237 

229 

219 

209 

a216

a222 

229 

243 

375 

470

Dec.

445 

435 

435 

465 

520

697 

803 

716 

645 

579

508 

380 

293 

307 

283

263 

270 

314 

333 

384

664 

1,050 

1,210 

1,350 

1,520

1,830 

1,880 

1,630 

1,390 

1,200 

1,060

Jan.

908 

749 

549 

549 

671

652 

627 

573 

492 

455

440 

411 

388 

450 

465

450 

440 

561 

838 

952

938 

873 

817 

789 

824

1,130 

1,340 

1,280 

1,160 

1,040 

960

Month

Octo 

Nove 

Dece

Ca

Jami 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

mber ......................

lendar year 1940 

ary

ember .....................

ter year 1940-41 ..........

Feb.

901 

880 

859 

845 

824

796 

810 

845 

824 

852

915 

982 

990 

952 

908

845 

803 

768 

742 

742

723 

697 

684 

684 

671

639 

621 

678

Secondfoot-days

7,250 

9,809 

23,859

497,370

22,771 

22 , 480 

67,182 

57,720 

59,190 

33,539 

12,835 

8,201 

10,576

335,412

Mar.

988 

2,770 

4,180 

3,640 

3,140

2,740 

2,440 

2,320 

2,440 

2,560

2,380 

2,160 

1,940 

1,780 

1,580

1,490 

1,410 

1,550 

1,830 

1,940

1,940 

1,830 

1,780 

1,680 

1,630

1,630 

1,730 

1,990 

2,260 

2,560 

2,880

Maximum

430 

537 

1,880

9",790

1,340 

990 

4,180 

3,280 

5,090 

1,900 

659 

317 

513

5,090

Apr.

3,070 

3,210 

3,280 

3,000 

2,810

2,560 

2,320 

2,160 

2,040 

1,990

2,040 

2,040 

2,040 

1,940 

1,880

1,830 

1,680 

1,540 

1,420 

1,300

1,220 

1,200 

1,240 

1,330 

1,430

1,440 

1,440 

1,440 

1,420 

1,410

May

1,480 

1,530 

1.4BO 

1,370 

1,520

1,470 

1,300 

1,290 

1,250 

1,140

1,090 

1,100 

1,170 

1,280 

1,280

1,260 

1,840 

4,760 

5,090 

4,020

3,350 

2,810 

2,440 

2,160 

1,950

1,800 

1,710 

1,580 

1,490 

1,440 

1,760

Minimum

185 

909 

263

162

388 

621 

982 

1,200 

1,090 

653 

306 

231 

266

185

June

1,900 

1,850 

1,800 

1,710 

1,620

1,530 

1,490 

1,440 

1,400 

1,280

1,190 

1,120 

1,080 

1,040 

1,020

980 

944 

930 

930 

902

839 

792 

754

714 

708

695 

653 

689 

792 

747

Mean

234 

327 

770

1,359

735 

803 

2,167 

1,924 

1,909 

1,118 

414 

265 

353

919

July

659 

623 

593 

564 

552

524 

507 

492 

470 

450

431 

426 

416 

308 

384

371 

363 

359 

359 

351

339 

328 

320 

317 

317

314 

306 

314 

347 

331 

310

T"er 

square 

mile

0.261 

.365 

.860

1.52

.821 

.897 

2.42 

2.15 

2.13 

1.25 

.463 

.296 

.394

1.03

Aug.

300 

290 

287 

287 

290

261 

272 

261 

256 

250

245 

248 

256 

261 

256

258 

248 

240 

233 

231

233 

231 

236 

245

258

266 

300 

317 

306 

284 

275

Sept.

266 

272 

281 

328 

328

303 

300 

290 

300 

314

367 

394 

412 

421 

502

513 

440 

416 

470 

470

426 

380 

347 

328 

306

296 

287 

278 

272 

269

Runoff

Inches

0.30 

.41 

.99

20.68

.95 

.93 

2.79 

2.40 

2.46 

1.40 

.53 

.34 

.44

13.94

Acre-feet

14,380 

19,460 

47,320

986,500

45,170 

44,590 

133,300 

114,500 

117,400 

65,520 

25,460 

16,270 

20,980

665,400

a No gage-height record; discharge interpolated.
SPOKANE RIVER BASIN 167

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., It miles upstream from Cataldo and 3 miles downstream from South Fork of Coeur 

d'Alene River. Datum of gage is 2,100 feet above mean sea level.

Drainage area.- 1,220 square miles.

Records available.- April 1911 to December 1912, July 1920 to September 1941.

Average discharge.- 22 years, 2,339 second-feet.

Extremes.- Maximum discharge during year, 6,440 second-feet May 19 (gage height, 43.35 

feet); minimum discharge, 265 second-feet Oct. 18; minimum gage height, 37.73 feet 

Oct. 1.

1911-12, 1920-41: Maximum discharge, 55,300 second-feet Dec. 22 or 23, 1933 (gage 

height, 56.9 feet, from floodmark), from logarithmic extension of rating curve above 

24,000 second-feet; minimum discharge, 122 second-feet Dee. 4, 1929; minimum gage 

height, 37.03 feet Sept. 6, 1931.

Remarks.- Records good except those for October, November, and September, which are fair. 

No appreciable diversions or regulation above station.

Cooperation.- Gage-height record and results of seven discharge measurements furnished by 

Washington Water Power Co.

Discharge, in second-feet, water year October 1940 to September 1941

Day

I

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

295

300

328

360

360

355

338

316

295

290

285

295

290

290

280

2SO

275

270

275

275

2S5

295

290

306

388

458

524

506

482 5-12

674

Nov.

751

688

660

625

572

524

488

639

828

800

730

604

518

464

458

440

42S

410

394

377

372

355

338

33S

372

350

360

399

807

966

-

Dec.

910

902

918

982

1,080

1,270

1,320

1,190

1,150

1,040

918

730

560

536

4S8

440

440

542

566

646

1,110

1,500

1,630

1,810

1,960

2,160

2,310

2,160

1,910

1,720

1,630

Jan.

1,400

1,190

91S

8S6

998

966

910

S35

730

660

618

572

536

611

632

604

597

842

1,270

1,450

1,400

1,320

1,230

1,190

1,230

1,680

1,860

1,760

1,630

1,500

1,360

Month

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

November ......................

December ......................

Calendar year 1940 .........

January .......................

February ...... ...............

March .........................

April .........................

May ...........................

June ..........................

July ..........................

August ........................

September .....................

Water year 1940-41 ..........

Feb.

1,270

1,230

1,190

1,190

1,190

1,150

1,150

1,150

1,150

1,150

1,230

1,270

1,320

1,270

1,230

1,150

1,090

1,050

1,030

1,020

982

950

918

926

918

856

828

856

_

_

-

Secondfoot-days

10,772

16,055

36,528

663,566

33,385

30,714

80,660

74, 680

83,160

47,140

18,215

11,344

15,996

458,649

Mar.

1,190

3,020

4,400

4,110

3,700

3,320

3,080

2,960

3,020

3,080

2,960

2,740

2,460

2,260

2,060

1,910

1,810

1,960

2,210

2,360

2,310

2,260

2,160

2,060

1,960

1,960

2,060

2,310

2,630

3,020

3,320

Maximum

674

966

2,310

10,500

1,860

1,320

4,400

3,830

6,050

2,630

958

446

765

6,050

Apr.

3,570

3,700

3,830

3,570

3,320

3,200

2,960

2,740

2,530

2,580

2,630

2,680

2,630

2,520

2,460

2,410

2,260

2,060

1,860

1,720

1,630

1,630

1,720

1,910

2,060

2,060

2,060

2,110

2,110

2,110

-

May

2,310

2,410

2,260

2,110

2,310

2,210

2,010

1,960

1,860

1,720

1,630

1,720

1,360

2,010

1,960

1,910

2,660

5,350

6,050

5,020

4,250

3,830

3,440

3,200

2,960

2,680

2,520

2,260

2,110

2,060

2,520

Minimum

270

338

440

235

536

828

1,190

1,630

1,630

942

422

311

390

270

June

2,630

2,580

2,520

2,360

2,260

2,110

2,060

2,060

1,960

1,310

1,630

1,540

1,500

1,450

1,450

1,400

1,320

1,320

1,320

1,270

1,190

1,110

1,060

1,020

1,010

998

942

1,050

1,150

1,060

-

Mean

347

535

1,178

1,813

1,077

1,097

2,602

2,489

2,683

1,571

588

366

533

1,257

July

968

894

842

814

779

765

730

709

681

653

625

618

597

572

554

536

518

512

500

432

470

452

446

440

434

428

422

434

476

452

422

Per

square 

mile

0.284

.439

.966

1.49

 863

.899

2.13

2.04

2.20

1.29

.482

.300

.437

1.03

Aug.

410

399

399

399

394

3S2

366

355

350

344

333

344

350

355

350

355

538

328

316

311

311

311

322

350

355

377

428

446

440

416

410

Sept.

399

416

428

476

476

458

458

440

440

470

542

584

618

646

765

758

674

660

737

751

6680

6600

6540

6490

6460

6435

6415

6400

6390

6390

-

Runoff

Inches

0.33

.49

1.11

20.23

1.02

.94

2.46

2.28

2.54

1.44

.56

.35

.49

14.01

Acre-feet

21,370

31,840

72,450

1,316,000

66,220

60,920

160,000

148,100

164,900

93, 500

36,130

22,500

31,730

909,700

e Stage-discharge relation indefinite; discharge computed on basis of records for station at 

Enaville.
168 SPOKANE RIVER BASIN

Coeur d'Alene Lake at Coeur d'Alene, Idaho

Location.- Water-stage recorder, lat. 47°40', long. 116°46', In sec. 24, T. 50 N., R. 4 

W., t>00 feet southwest of south end of Eleventh Street, Coeur d'Alene. Datum of gage 

Is 2,100.00 feet above mean sea level, referred to originally accepted elevation 

(2,157.40 feet) of Geological Survey bench mark In southeast corner of Merrlam Building (see Water Supply Paper 882).

Drainage area.- 3,750 square miles.

Records available.- February 1905 to September 1941. April 1903 to February 1905, from 

St. Joe Boom Co.'s gage at mouth of St. Joe River.

Extremes.- Maximum gage height during year, 28.43 feet May 31, June 1; minimum, 23.26 

reet Oct. 23.

1903-41: Maximum gage height, 39.05 feet Dec. 25, 1933; minimum, 19.9 feet Oct. 

10-12, 1904, Sept. 24, 25, 1905, and Oct. 14 to Nov. 3, 1906.

Maximum stage known prior to 1903, 37.6 feet May 31, 1894, from high-water marks.

Remarks.- Washington Water Power Co. stores considerable water In lake. Stage regulated 

by talntor gates and bear-trap dam at Post Falls.

Cooperation.- Gage-height record furnished by Washington Water Power Go.

Gage heijgit, In feet, water year October 1940 to September 1941

Day

1

Z

S

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

23.59

23.60

23.68

23.75

23.79

23. SO

23.80

23.78

23.73

23.69

23. ,>

23.58

23.54

23.51

23.46

23.41

23.38

23.36

23.34

23.32

23.33

23.30

23.87

23.29

23.32

23.29

25.33

23,37

23.40

25.41

25.41

NOV.

23 46

23.53

23.59

23.62

23.63

23.63

23.64

23.69

23.75

23.78

23.78

23.76

23.72

23.68

23.65

23.62

23.60

23.59

23.58

23.59

23.61

23.61

23.60

23.62

23.61

23.57

23.55

23.55

23.71

24.08

Dec.

24.30

24.44

24.56

24.64

24.74

24.77

24.84

24.87

24.86

24.78

24.68

24.56

24.48

24.41

24.34

24.28

24.22

24.18

24.17

24.22

24.40

24.65

24.87

25.12

25.25

25.36

25.52

25.56

25.51

25.40

25.24

Jan.

25.04

24.81

24.66

24.69

24.76

24.82

24.81

24.78

24.76

24.76

24.76

24.75

24.73

24.72

24.73

24.72

24.72

24.84

24.97

25.02

24.99

24.89

24.78

24.67

24,61

24.66

24.71

24.70

24.65

24.56

24.45

Feb.

24.35

24.27

24.18

24.11

24.11

24.11

24.11

24.09

24.08

24.10

24.16

24.24

24.27

24.25

24.20

24.14

24.06

24.00

23.93

23.89

23.86

23.86

23.84

23.87

23.88

23.88

23.87

23.89

_

-

Mar.

23.96

24.16

24.52

24.79

24.94

25. OO

25.01

24.98

24.94

24.90

24.67

24.83

24.81

24.79

24.73

24.68

24.62

24.65

24.69

24.73

24.79

24.83

24.89

24.93

24.94

24.96

24.99

25.09

25.24

25.41

25.60

Apr.

25.76

25.92

26.00

26.02

26.02

26.01

25.98

25.93

25.97

26.12

26.20

26.28

26.31

26.40

26.51

26.58

26.65

26.77

26.86

26.93

27.01

27.06

27.13

27.21

27.36

27.51

27.65

27.77

27.83

27.90

-

Hay

27.92

27.88

27.87

27.79

27.83

27.87

27.85

27.85

27.82

27.82

27.83

27.88

27.93

27.93

27.92

27.94

27.93

28.01

28.03

27.95

27.83

27.79

27.86

27.86

27.88

27.87

27.87

27.94

28.07

28.22

28.40

June

28.41

28.37

28.29

28.18

28.07

27.99

27.99

27.98

27.99

27.98

27.96

28.00

28.03

27.95

27.91

27.87

27.82

27.81

27.87

27.92

27.95

28.00

28.06

28.02

27.98

27.95

27.96

28.02

28.02

27.96

-

July

27.98

28.00

28.00

28.00

27.99

27.99

28.02

28.00

27.97

27.96

27.96

27.96

27.95

27.96

27.97

27.97

27.98

27.97

27.97

27.98

27.97

27.93

27.89

27.87

27.85

27.85

27.84

27.82

27.81

27.80

27.78

Aug.

27.76

27.70

27,64

27,60

27,58

27.56

27,53

27,49

27,45

27.41

27.38

27.32

27.25

27.20

27.17

27,15

27.14

27.10

27.05

27,00

26.96

26,91

26.88

26.87

26.81

26,77

26.78

26.79

26,79

26.80

26.79

Sept.

26.77

26.77

26.81

26.82

26.82

26.81

26.79

26.78

26.78

26,74

26.75

26,76

26.80

26.83

26.84

26.86

26.87

26.92

26.94

26.93

26.91

26.89

26.87

26.84

26.80

26.78

26.72

26.66

26.61

26.58

-

Hote.- Add 3,100 feet to obtain elevations above mean sea level.
SPOKANE RIVER BASIN 169

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 Farms Co.'s canal, and 1 mile west of Post 

Falls. Datum of gage is 2,000 feet above mean sea level,

Drainage area.- 3,880 square miles.

Records available.- January 1913 to September 1941.

Average discharger- River alone, 28 years (1913-41), 5,836 second-feet; river and Spokane

 Valley Farms Co.'s canal, 28 years (1913-41), 5,923 second-feet.

Extremes.- Maximum daily discharge during year, 15,200 second-feet (estimated) May 19;

 minimum discharge recorded, 378 second-feet (regulated) Aug. 31 (gage height, 65.17 feet).

1913-41: Maximum discharge, 50,100 second-feet when recorder was not operating 

Dec. 25, 1933 (determined from unpublished records collected by Washington Water Power 

Co. for station at Liberty Bridge); minimum, that of Aug. 31, 1941.

Remarks.- Records good. Spokane Valley Farms Co.'s canal diverts water 3,300 feet above

 gage for irrigation (see p. 175 ). Flow partly regulated by Coeur d'Alene Lake. 

Cooperation.- Gage-height record and results of four discharge measurements furnished by 

Washington Water Power Co.

Rating table, water year 1940-41 (gage height, .In feet, and discharge, In second-feet)

65.2 395 67.6 2,330 70.5 7,780 

65.6 630 68.0 2,840 71.0 8,930 

66.0 895 68.5 3,650 71.5 10,290 

66.4 1,190 69.0 4,570 72.0 11,730 

66.8 1,520 69.5 5,570 72.5 13,330 

67.2 1,900 70.0 6,650 73.0 15,160

Discharge, In second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

6

6 

7 

8 

9 

10

11 

12 

IS 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

26

26 

87 

28 

20

SO 

31

Oct.

734 

498 

468 

528 

61S

656 

1,030 

1,390 

1,480 

1,430

1,430 

1,390 

1,350 

1,520 

1,430

1,130 

1,080 

1,020 

1,020 

881

1.090 

806 

1,070 

1,050 

948

1,350 

1.060 

S81 

1,160 

1,430 

1,270

Hov.

1,090 

799 

944 

1,480 

1,390

1,480 

1,390 

1,390 

1,390 

-,390

1,390 

1,430 

1,430 

1,390 

1,430

1,390 

1,390 

1,160 

944 

860

312 

888 

799 

1,090 

1,480

1,660 

1,700 

1,900 

2,000 

1,610

Month

Oet 

HOT 

Dec

Ca.

Jam FabMan 

Apr 

May 

jum 

Jul 

Aiigi 

8ep

Wa

Lendar year 1940

ter year 1940-41

Dee.

874 

1,080 

1,140 

1,850 

2,510

2,570 

2,510 

3,070 

3,560 

4,010

4,010 

3,070 

2,390 

2,060 

1,950

2,000 

2,060 

2,060 

2,060 

1,850

1,430 

1,390 

2,020 

4,230 

6,210

6,870 

7,550 

8,490 

8,490 

8,490 

8,490

Jan.

3,010 

5,980 

3,160 

1,390 

1,430

2,610 

3,230 

2,840 

2,110 

1,800

1,750 

1,800 

2,280 

2,280 

2,220

2,220 

2,220 

4, ISO 

6,870 

7,320

7,320 

7,090 

6,870 

6,370 

6,650

6,650 

6,870 

6,870 

6,650 

6,650 

6,430

Feb.

6,210 

6,210 

5,570 

4,540 

3,830

3,920 

3,830 

3,830 

3,830 

3,830

3,330 

3,920 

4,480 

4,760 

4,860

4,760 

4,660 

4,190 

3,830 

3,740

3,150 

2,700 

2,640 

2,700 

2,700

2,700 

2,640 

2,640

Mar.

2,700 

2,770 

4,200 

5,990 

6,870

7,320 

7,320 

7,320 

7,090 

7,090

6,650 

5,990 

5,570 

5,570 

5,570

5,570 

4,330 

3,650 

3,650 

3,650

3,740 

3,740 

3,740 

3,830 

3,830

3,830 

2,920 

2,390 

2,390 

2,390 

3,360

Obs erred

Discharge in 

second-feet

Maxl1,520 

2,000 

8,490

1.6,300

8,010 

6,210 

7,320 

7,550 

15,200 

8,490 

1,350 

1,520 

1,660

15,200

Mini468 

799 

874

468

1,390 

2,640 

2,390 

1,270 

1,350 

944 

480 

444 

656

444

He an

1,073 

1,317 

3,559

4,747

4,536 

3,946 

4,678 

3,923 

6,826 

4,114 

935 

1,001 

1,146

3,036

Runoff 

in 

acre-feet

65, 950 

78,340 

218,900

3,446,550

273,900 

219,200 

287, 700 

233,400 

419,700 

244, 800 

57,500 

61,520 

68,210

2,234,120

Apr*

4,190 

5,610 

7,320 

7,550 

7,550

7,550 

7,320 

6,430 

3,590 

3,540

4,280 

5,060 

4,280 

3,740 

3,400

3,480 

2,640 

2,280 

2,220 

1,800

2,220 

2,330 

2,280 

1,430 

1,270

1,310 

1,700 

2,690 

4,100 

4,530

May

6,720 

7,320 

7,780 

7,090 

6,430

6,430 

6,430 

6,430 

5,570 

4,660

4,100 

a4,300 

a4,900 

a6,300 

a5,300

a5, SOO 

a8,400 

a 12, 500 

a!5,200 

a!3, 500

a!2,000 

aS, 300 

a6,800 

a7,400 

a5,600

a5,900 

a5,500 

aS, 500 

a2,500 

al, 350 

a7,600

Diversion

through 

Spokane 

Valley Farms 

Co.'s canal 

(acre-feet)

353 

163 

14

68,640

6.0 

0 

113 

4,700 

13,950 

14,670 

15,660 

15,410 

4,730

69,969

June

a7, 600 

aS, 000 

8,490 

3,490 

7,730

5,990 

5,570 

5,260 

5,260 

5,260

3,540 

2,570 

4,850 

4,570 

3,920

4,470 

3,920 

2,510 

1,790 

1,750

1,260 

1,270 

2,170 

2,570 

2,570

1,750 

944 

2,190 

4,100 

3,020

July

1,610 

1,850 

1,850 

1,750 

1,660

1,010 

1,260 

1,660 

1,160 

839

318 

806 

747 

740 

682

594 

669 

61S 

630 

618

624 

624 

534 

522 

493

430 

728 

1,000 

832 

747 

832

Aug.

1,020 

1,040 

1,100 

1,120 

1,100

1,110 

1,170 

1,170 

1,170 

1,170

1,200 

1,270 

1,520 

1,340 

860

S32 

916 

1,120 

1,110 

1,060

979 

951 

937 

937 

993

965 

740 

570 

546 

444 

558

Sept.

688 

676 

669 

708 

714

656 

695 

930 

1,040 

1,190

1,210 

919 

702 

909 

1,000

1,000 

881 

1,010 

1,350 

1,430

1,480 

1,480 

1,480 

1,560 

1,660

1,660 

1,660 

1,660 

1,660 

1,660 

0

Corrected for diversion

Runoff 

in 

acre-feet

66,303 

78,503 

218,914

3,515,190

278,906 

219,200 

287,813 

238, 100 

433,650 

259,470 

73,360 

76,930 

72,940

2,304,089

Discharge in 

second-feet

Mean

1,073 

1,319 

3,560

4,842

4,536 

3,946 

4,630 

4,002 

7,053 

4,361 

1,193 

1,251 

1,226

3,183

Per 

square

mile

:

1.25

-

0.820

in

llV?hftB

:

17.01

11.13

a Incomplete or no gage-height record; discharge computed on basis of discharge measurement June 2, 

records for Spokane River at Liberty Bridge (Washington Water Power Co. station), and records for 

station at Spokane.

Hote.- Monthly figures showing discharge In second-feet per square mile and runoff In inches are 

not published, owing to regulation by Coeur d'Alene lake. The yearly figures represent more nearly 

the natural discharge and runoff.
170 SPOKANE RIVER BASIN

Spokane River at Spokane, Wash.

Location.- Water-stage recorder, lat. 47°39'30", long. 117°26'50", In sec. 13, T. 25 N., 

R. 42 E., at Cochran Street in Spokane, half a mile upstream from Latah Creek. Datum 

of gage Is about- 1>700 feet above mean sea level, subject to correction to datum of 

1929.

Drainage area.- 4,350 square miles.

Records available.- April 1891 to September 1941.

Average discharge.- 50 years, 6,767 second-feet, (adjusted).

Extremes.- Maximum discharge during year, 16,100 second-feet (regulated) May 19 (gage 

height, 23.44 feet); minimum, 750 second-feet (regulated) July 24 (gage height, 17.05 

feet); minimum dally, 1,050 second-feet (regulated) July 24.

1891-1941': Maximum discharge, 49,000 second-feet May 31, 1894; minimum, 268 secondfeet (regulated) Dec. 28, 1935 (gage height, 16.37 feet); minimum dally, 1,040 secondfeet (regulated) Nov. 28, 1935.

Remarks.- Records excellent. Water for irrigation diverted above station by Spokane 

valley Farms Co. Flow partly regulated by Coeur d'Alene Lake (see p. 168) and by 

pondage at Spokane. Capacity of Coeur d'Alene Lake between elevations 2,117 and 2,135 

feet, 770,000 acre-feet.

foopgpt10"-- Gage-height record collected in cooperation with Washington Water Power Co., wnicn also furnished results of two discharge measurements.

Rating table, water year 1940-41 (gage height, in feet, and discharge, In second-feat)

17.1 

17.3 

17.6 

1S.O 

13.6

SOO 

1,010 

1,360 

1,370 

2,560

19.0

20.0

21.0

22.0

23.0

3,400

5,450

8,010

11,000

14,500

Discharge, In second-feet, water ysar October 1940 *° September 1941

Day

1 

2 

3 

4 

6

6

7 

6 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

26

26 

27 

28 

29 

30 

31

Oct.

1,530 

1,280 

1,190 

1,120 

1,170

tl,140 

1,470 

1,530 i,eeo

1,900 

1,900 i.eso

tl,760 

l,81p 

2,010

1,840 

1,670 

1,530 

1,520 

tl,270

1,620 

1,340 

1,620 

1,550 

1,350

1,70O 

fl,790 

1,350 

1,480 

1.91O 

1,880

Nov.

1,730 

1,33O 

tl,320 

1,750 

1,89O

1,S40 

1,940 

1,860 

1,390 

tl ,670

1,350 

1,S20 

1,960 

1,840 

1.8SO

1,890 

+1,880 

2,020 

1,660 

1,550

1,390 

1,360 

1,480 

tl,330 

1.S50

1,960 

1,980 

2,040 

2,410 

2,37O

Month

OCt 

NOT

Dee

Ce.

jam 

Febi 

Man 

Apr 

May

JlQU

Jul 

Augl

Sep 

Wa

Lender year 1940

ter year 1940-41

Dec.

tl,430 

1.42O 

1,670 

1,96O 

2,750

2,950 

2,960 

f3,380 

3,660 

4,100

4,120 

3, SOO 

3,090 

2,560 

t2,590

2,490 

2,530 

2,610 

2,560 

2,560

2,120 

tl,980 

2,090 

3,620 

5,360

6,310 

7,600 

8,600 

fS,500 

8,500 

8,300

Jan.

7,710 

6,760 

4,640 

2,230 

t2,140

2,730 

3,580 

3,470 

2,900 

2,420

2,380 

t2 ,340 

2,750 

2,850 

2,810

2,740 

2,770 

S,650 

t6,160 

6,900

7,050 

6,910 

6,790 

6,740 

6,650

t6,600 

6,740 

6,750 

6,720 

6,620 

6,470

Feb.

6,300 

f6 ,230 

5,SSO 

5,120 

4,220

4,270 

4,220 

4,170 

t4,180 

4,200

4,130 

4,190 

4,440 

4,870 

4,870

f4,8SO 

4,850 

4,560 

4,160 

4,000

3,860 

3,280 

+3 ,140 

3,200 

3,210

3,160 

3,180 

3,170

Mar.

3,200 

f3,230 

3,890 

5,590 

6,7SO

7,140 

7,160 

7,150 

t7,060 

7,090

6,790 

6,230 

5,710 

5,630 

5,640

+5,600 

4,970 

4,050 

4,030 

4,050

4,060 

4,120 

t4,090 

4,100 

4,080

4,080 

3,650 

2,95O 

2,910 

t2,880 

3,270

Observed

Discharge In 

second-feet

Maximum

2,010 

2,410 

8,600

16 ,100

7,710 

6,300 

7,160 

7,510 

14,200 

8,570 

2,480 

1,960 

2,130

14,200

Minimum

1,120 

1,32O 

1,420

1,120

2,140 

3,140 

2,880 

1,850 

2,590 

1,800 

1,050 

1,060 

1,220

1,050

Mean

1,584 

1,798 

3,S12

5,130

4,780 

4,285 

4,876 

4,261 

8,915 

4,617 

1,557 

1,517 

1,661

3,470

Runoff 

In 

acre-feet

97,370 

107,000 

234,400

3,724,000

293 ,900 

238,000 

299,800 

253 ,500 

425,200 

274 ,700 

95,760 

93,300 

98 ,82C

2,512,000

Apr.

4,300 

5,150 

6,850 

7,480 

7,510

|7 ,430 

7,300 

6,680 

4,820 

3,620

4,530 

4,890 

+5,110 

4,210 

3,940

3,930 

3,610 

2,920 

2,930 

f2,660

2,650 

2,920 

2,920 

2,550 

1,910

1,850 

fl,950 

2,680 

4,150 

4,330

May

5,860

7,160 

7,440 

f7,420 

6,350

6,400 

6,430 

6,320 

5,920 

5,280

t4,460 

4,470 

4,840 

6,260 

5,900

5,700 

7,820 

fll,000 

14,200 

13 ,800

12,600 

9,370 

7,290 

7,7SO 

+6,260

6,300 

6,210 

4,540 

3,340 

2,590 

5,060

contents In 

Goeur d'Alene 

Lake 

(acre-feet)

-4,590 

+18,190 

+31,720

+46,400

-21 ,580 

-15,270 

+46 ,770 

+82,000 

+24,200 

-21,320 

-8,520 

-40,410 

-7,190

+84 ,000

June

t7,580 

7,780 

8,530 

8,570 

8,120

6,860 

5,960 

+5,500 

5,540 

5,530

4,720 

3,340 

4,230 

5,150 

t4,630

4,420 

4,570 

3,640 

2,760 

2,630

2,190 

f2,010 

2,550 

3,190 

3,320

2,920 

1,800 

2,220 

f4,220 

4,030

July

8,430 

2,480 

2,430 

2,320 

2,340

+1,960 

1,700 

2,270 

1,990 

1,520

1,520 

1,490 

+1,400 

1,3SO 

1,340

1,310 

1,200 

1,260 

1,210 

+1,240

1,220 

1,220 

1,230 

1,050 

1,110

1,100 ti.no

1,460 

1,440 

1,280 

1,270

Aug.

1,430 

1,510 

+1,590 

1,590 

1,580

1,600 

1,600 

1,620 

1,640 

+1,620

1,630 

1,670 

1,860 

1,960 

1,490

1,370 

tl,3SO 

1,540 

1,620 

1,570

1,540 

1,490 

1,480 

tl,500 

1,510

1,550 

1,480 

1,220 

1,180 

1,110 

tl,060

Sept.

1,250 

1,300 

1,290 

1,250 

1,300

1,300 

+1,220 

1,440 

1,510 

1,700

1,730 

1,720 

1,290 

+1,370 

1,510

1,620 

1,440 

1,450 

1,840 

 1,860

+1,960 

1,940 

1,950 

1,930 

2,110

2,090 

2,110 

+2,090 

2,130 

2,120

Adjusted for change 

In lake contents

Runoff 

In 

acre-feet

92,780 

125,200 

266 ,100

3,770,000

272 ,300 

222,700 

346 ,600 

335,500 

449,400 

253,400 

87,240 

52,690 

91,630

2,596,000

Discharge In 

second- feet

Mean

1,509 

2,104 

4,328

5,193

4,429 

4,010 

5,637 

5,638 

7,309 

4,259 

1,419 

860 

1,540

3,585

Per 

square

mile

0.347 

.484 

.995

1.19

1.02 

.922 

1.30 

1.30 

1.68 

.979 

.326 

.193 

.354

.824

Runin 

Inches

0.40 

.54 

1.15

16.27

1.18 

.96 

1.50 

1.45 

1,94 

1.09 

.38 

.23 

.40

11.22

t Sunday.

Note_.- Change In contents Is based on mean gage heights for last day of each month.
SPOKANE RIVER BASIN 

Spokane River at Long Lake, Wash.

171

Location.- Water-stage recorder, lat. 47°50', long. 117°50', in SWi sec. 13, T. 27 N., R.

 39 K., at Long Lake power plant, 12 miles north of Reardan. Datum of gage is 1,300.00

feet above mean sea level, subject to correction for datura of 1929. 

Drainage area.- 6,100 square miles. 

Records available.- April 1939 to September 1941. 

Extremes (regulated).-Maximum discharge during year, 19,800 second-feet nay 19 (gage

 height, 68.18 feel;); minimum not determined, occurred during period of backwater from 

Little Falls power plant; minimum daily, 161 second-feet July 20, determined from 

records of power plant operation. ,,_ ,- 

1939-41: Maximum discharge, 29,300 second-feet May 6, 1939 (gage height, 70.95 

feet); minimum, 115 second-feet Oct. 6, 1939 (gage height, 57.66 feet), but may have 

been less sometime during period of backwater in water year 1940-41; minimum daily, 

that of July 20, 1941. Remarks.- Records good. Water diverted above station for irrigation. Flow affected

 considerably by power regulation and by Coeur d'Alene Lake. Capacity of Coeur d'Alene 

Lake between elevations 2,117 and 2,135 feet, 770,000 acre-feet. Capacity of Long Lake 

between elevations 1,512 and 1,531 feet, 79,600 acre-feet.

Cooperation.- Gage-height record collected in cooperation with Washington Water Power Co.,

 which furnished some discharge measurements and gage heights for Long Lake.

Rating table, water year 1940-41 (gage height, In feet, and discharge, In second-feet)

57.5 130 58,7 552 61.0 2,750 

57.7 175 59.0 710 62.0 4,420 

57.9 232 59.3 905 63,0 6,340 

53.1 300 59.6 1,140 64,0 8,480 

58.3 376 60.0 1,500 66.0 13,400 

53.5 460 60,5 2,060 68.0 19,200

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

f 1,900 

1,890 

2,950 

2,680 

2,030

tl,300 

3,010 

2,850 

3,040 

3,010

2,850 

2,200 

t691 

2,620 

2,790

2,760 

2,450 

2,530 

1,690 

tl,060

2,140 

2,720 

2,480 

2,500 

2,260

1,330 

tl,540 

3,190 

3,260 

2,810 

2,570

Nov.

2,790 

2,360 

tl,440 

2,610 

2,750

2,630 

2,660 

2,860 

1,980 

tl,010

1,510 

3,080 

2,980 

3,120 

2,940

2,760 

tl,580 

2,750 

3,500 

3,600

2,090 

3,470 

2,920 

tl,910 

2,940

3,080 

3,170 

3,260 

3,110 

3,800

Month

Oct 

HOT

Dec

Ca

Jan 

Pet 

Mar 

Apr 

May 

Jun 

Jul 

Aug 

Sep

Wa

lendar year 1940

ter year 1940-41

Dec.

+3.00C 

3,580 

3,740 

3,130 

2,980

4,310 

5,500 

+5,460 

3,950 

4,110

4,320 

4,260 

3,980 

3,410 

+2,260

3,730 

3,780 

3,380 

3,260 

3,390

5,730 

+4,790 

3,940 

4,840 

7,770

6,780 

13, 500 

11,500 

11, 700 

10,200 

9,590

Jan.

9,800 

7,760 

4,630 

4,330 

+4,560

4,460 

4,390 

4,520 

4,400 

4,490

3,760 

t2,740 

3,710 

3,060 

3,720

3,610 

3,950 

4,990 

( 11,400 

10,900

10,900 

8,410 

10,000 

7,950 

9,940

Ml, 900 

10,300 

9,910 

9,000 

8,750 

7,840

Feb.

8,370 

+8,570 

7,960 

7,300 

5,320

6,560 

5,340 

6,270 

t5 ,480 

5,750

6,480 

6,530 

6,690 

6,950 

6,680

t5,950 

6,970 

6,180 

5,580 

5,550

5,570 

5,360 

t4,000 

3,940 

4,030

4,780 

4,830 

4,310

Har.

5,100 

f4,900 

6,220 

6,900 

8,460

8,490 

9,460 

8,920 

+8,130 

S,700

8,580 

7,640 

6,960 

7,370 

7,590

t6,3SO 

6,360 

6,110 

4,960 

5,360

5,160 

5,530 

t*,970 

5,960 

5,140

4,950 

5,130 

4,450 

4,550 

+3,770 

3,780

Observed

Discharge in 

second-feet

Maximum

3,260 

3,800 

13,500

20,600

11,900 

8,570 

9,460 

9,290 

16 ,000 

9,890 

3,950 

3,270 

3,690

16 ,000

Mini691 

1,010 

2,260

604

2,740 

3,940 

3,770 

2,840 

3,820 

2,130 

161 

322 

511

161

Mean

a, 358 

2,689 

5,415

6,369

6,777 

5,975 

6,322 

5,573 

7,743 

5,595 

2,316 

2,106 

2,249

4.586

Runoff 

in 

acre-feet

145, OOC 

160,000 

333, OOC

4, 623, OOC

416.70C 

331 ,SOC 

388, 70C 

331 ,60C 

476, 10C 

332, 90C 

142, 40C 

129, 50C 

133 ,80C

3, 322, OOC

Apr.

5,370 

5,360 

8,960 

8,610 

9,290

+7,710 

9,280 

7,980 

6,480 

4,880

4,910 

5,610 

t6 ,790 

5,580 

4,680

5,480 

5,070 

4,710 

4,930 

t3,S10

3,530 

4,220 

4,500 

4,460 

5,100

3,870 

t2,840 

4,410 

4,760 

3,960

May

3,820 

4,300 

6,680 

te,620 

7,400

7,110 

f7 ,330 

7,480 

6,930 

5,990

t5,670 

5,730 

5,330 

7,330 

7,070

6,560 

8,480 

til, 400 

16,400 

16,000

14,900 

10,900 

8,110 

8,380

+7,350

7,450 

7,550 

5,990 

5,560 

4,610 

4,600

Change in

contents in 

Coeur d'Alene 

and 

Long Lakes 

(acre-feet)

-6,990 

+16,340 

+33,770

+50,350

-18 ,180 

-15,770 

+47 ,020 

+69,300 

+37,650 

-21,070 

-14,270 

-33,560 

-5,040

+84,200

June

+8,910 

8,950 

8,500 

9,390 

8,960

8,330 

6,340 

t6 ,700 

6,570 

7,150

6,070 

4,450 

3,5.t<0 

6,810 

t5,700

4,750 

5,730 

5,400 

4,010 

4,180

3,890 

t2,130 

f2,910 

3,520 

3,910

4,260 

4,030 

2,810 

f3,230 

5,870

July

3,950 

3,S20 

3,780 

1,390 

3,540

f2,570 

3,900 

3,420 

2,740 

2,950

2,490 

1,380 

+682 

1,860 

1,940

2,790 

3,010 

2,090 

1,420 

tl61

1,750 

1,660 

2,310 

2,520 

2,710

1,800 

t505 

1,470 

2,610 

2,570 

2,010

Aug.

2,250 

1,170 

t322 

2,350 

2,800

3,160 

3,220 

2,820 

1,260 

t490

2,640 

2,440 

3,020 

3,080 

3,270

1,790 

f366 

2,410 

2,300 

2,520

2,460 

2,770 

1,420 

t569 

2,240

2,410 

2,050 

2,320 

2,700 

1,680 

t774

Sept.

832 

2,220 

2,650 

2,380 

2,260

1,990 

t7S3 

2,700 

2,760 

2,400

2,220 

2,040 

1,480 

t511 

2,120

2,260 

3,430 

3,130 

3,480 

3,690

fl,590 

1,770 

2,200 

1,920 

2,560

3,240 

2,280 

+1,260 

2,250 

3,050

Adjusted for change 

In lake contents

Runoff 

in 

acre feet

138,000 

176,300 

366,800

4,673,000

598,500 

316,000 

435,700 

400,900 

513,800 

311,800 

128,100 

90,900 

128 ,800

3,406,000

Discharge in 

second-feet

Mean

2,244 

2,963 

5,965

6,437

6,481 

5,690 

7,086 

6,737 

8,356 

5,240 

2,083 

1,478 

2,165

4,704

Per 

square

mile

0.36S 

.486 

.978

1.06

1.06 

.932 

1.16 

1.10 

1.37

.ess

.34] 

.245 

.35J

.771

Runin 

inches

0.42 

.54 

1.13

14.36

1.22 

.97 

1.34 

1.23 

1.58 

.96 

.39 

.28 

.40

10.46

t Sunday

f Computed on basis of partly estimated gage-height record.

Note.- Gage-height record affected by backwater June 27 to Sept. 30j discharge computed by Washlngton Water Power Co. from record of power production. Change in contents of Coeur d'Alene Lake based 

on mean gage heights for last day of each month, and for Long Lake on midnight gage readings.

461678 0-42-12
172 SPOKANE RIVER BASIN 

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, and Pacific Ry. 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 1941. April 1911 to September 1912, at station 

g* miles downstream.

ge.- 21 years (1920-41), 2,221 second-feet.

Extremes.- Maximum discharge during year, 5,280 second-feet May 18 (gage height, 83.86 

feet); minimum recorded discharge, 235 second-feet sometime between Nov. 11 and 23 

(gage height, 79.05 feet).

1911-12, 1920-41: Maximum discharge, 53,000 second-feet Dec. 23, 1933, computed on 

basis of slope between gages downstream; maximum gage height, 93.1 feet Apr. 18, 1938, 

from floodmark; minimum discharge, 96 second-feet Dec. 5, 1928 (gage height, 78.43 

feet).

Remarks.- Records excellent except those for Nov. 11-21, Nov. 27 to Dec. 20, Jan. 24-27, 

Feb. 13-26, Apr. 2, which are fair, and those for Dec. 21 to Jan. 23, Apr. 3 to May 6, 

which are poor. No diversions above gage. Operation of splash dam on Marble Creek 

causes some diurnal fluctuation during log-driving season.

Cooperation.- Gage-height record and results of seven discharge measurements furnished by 

Washington Water Power Co.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in 

second-feet)

79.2

79.6

80.0

80.4

80.8

280

435

650

920

1,250

SI.2 

81.6 

82.0 

82.4 

S2.S

1,620 

2,020 

2,460 

2,940 

3.4SO

83.2 4,090

83.6 4,750

S4.0 5,470

Discharge, in seoond-feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

480

426

568

644

495

408

370

350

340

329

336

362

362

354

336

326

318

315

312

308

326

332

318

326

435

440

480

470

426

- 455

495

Nov.

602

608

590

510

455

426

426

579

614

5;i

a460

a400

a350

a320

a330

a340

a350

a350

a340

a330

a325

336

315

350

354

358

6360

6380

el, 200

61,500

-

Dec.

el,150

e900

6850

e900

el, 050

el, 200

el, 200

el,050

e950

6800

6650

6500

6400

a420

a400

a370

a370

8430

8470

a8 00

 v

el, 350

J

Jan.

-

> a700

-

8500

a850

762

a800

8900

a940

845

803

736

762

Feb.

775

S17

7S2

749

704

710

742

762

742

756

824

831

a820

a800

8760

8720

8705

8690

8680

8680

a 660

8640

a620

8620

a640

8620

632

723

_

_

-

Mar.

1,040

2,020

2,130

1,970

1,870

1,720

1,620

1,620

1,670

1,620

1,570

1,430

1,300

1,250

1,200

1,160

1,120

1,340

1,380

1,340

1,300

1,300

1,250

1,200

1,200

1,300

1,430

1,620

1,870

2,020

2,300

Apr.

2,520

a2,SOO

.a2,300

,a2,000

May

 a2,900

3,140

3,140

2,880

2,760

2,760

3,070

3,410

3,560

83,300

3,070

83,900

85,200

85,100

84,600

a4,100

83,700

83,400

83,200

83,100

3,000

2,880

2,700

2,580

2,700

3,200

June

3,200

3,140

3,000

2,880

2,760

2,640

2,580

2.640

2,460

2,300

2,130

2,080

1,970

1,970

1,920

1,820

1,820

1,820

1,770

1,820

1,620

1,520

1,480

1,380

1,430

1,340

1,300

1,670

1,520

1,380

-

July

1,300

1,250

1,160

1,120

1,080

1,040

1,000

976

920

905

868

831

303

762

736

730

736

736

704

686

662

644

626

620

614

608

590

608

662

608

562

Aug.

552

530

525

515

505

495

485

475

470

475

465

470

490

480

460

445

430

412

399

394

394

408

417

435

404

404

460

475

417

394

426

Sept.

412

417

435

495

495

470

490

480

450

540

535

574

789

730

890

730

579

525

562

530

505

475

450

430

426

422

422

417

394

390

-

Month

December ......................

September ......... ...........

Water year 1940-41 ..........

Secondfoot-days

12,242 

14,373 

29,710

631,024

20*204 

47,210 

65,220 

101,850 

61,410 

25,147 

14,106 

15,459

428,729

Maximum

644 

1,500

7,880

831 

2,300

5,200 

3,200 

1,300 

552 

890

5,200

Minimum

308 

315 

370

298

620 

1,O40

1,300 

562 

394 

390

308

Mean

395 

479 

958

1,724

703 

722 

1,523 

2,174 

3,285 

2,047 

811 

455 

515

1,175

Per 

square 

mile

0.366 

.444 

.887

1.60

.651 

.669 

1.41 

2.01 

3.04 

1.90 

.751 

.421 

.477

1.09

Runoff

Inches

0.42 

.50 

1.02

21.73

.75 

.70 

1.63 

2.24 

3.50 

2.12 

.87 

.49 

.53

14.77

Acre-feet

24,280 

28,510 

58,930

1,252,000

43,240 

40,070 

93,640 

129,400 

202,000 

121,800 

49,880 

27,980 

30,660

350,400

a Incomplete or no 

weather recon"

e or no gage-height record; discharge computed on basis of records for nearby stations, 

'ds, and fragmentary gage heights, and available discharge measurements, 

e Recorder time scale non-standard; discharge computed on basis of assumed time scale, records 

for nearby stations, and weather records.
SPOKANE RIVER BASIN 173

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 approximately 2,160 feet above mean sea level.

Drainage area.- 420 square miles.

Records available.- July 1911 to October 1912, July 1920 to September 1941.

Average discharge.- 21 years (1920-41), 481 second-feet.

Extremes.- Maximum discharge observed during year, 3,260 second-feet Nov. 29 or 30 (gage 

neignt, 6.58 feet from floodmark); minimum daily discharge, 60 second-feet Nov. 23 

(discharge measurement), 24 (estimated); minimum gage height observed, 3.48 feet Oct. 

20, 21.

1911-12, 1920-41: Maximum discharge observed, 23,800 second-feet Dec. 22, 23, 1933 

(gage height, 12.1 feet), from rating curve extended logarithmically above 4,000 secondfeet; minimum discharge, 16 second-feet (estimated) Nov. 21, 1929; minimum gage height, 

2.71 feet Nov. 20, 1929.

Remarks.- Records fair except those for Nov. 29, Jan. 19, 20, which are poor. Gage read 

once daily. No diversions above gage.

Cooperation.- Gage-height record and results of six discharge measurements furnished by 

Washington Water Power Co.

Discharge, in second-feet, water year October 1940 to September 1941

Day

i

2

3

4

5

6

7

8

9

10

11

12

13

14

15

1Q

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

Ill

131

138

386

828

172

104

89

79

76

71

71

73

73

76

73

68

66

66

63

63

66

68

73

104

152

172

168

160

160

172

Nov.

193

224

215

193

152

134

172

202

281

252

172

134

104

b70

b75

b80

b80

b80

b75

b70

b70

b65

*b60

b60

b65

b70

b75

b90

bl,700

1,200

-

Dec.

693

473

460

500

460

646

493

434

340

296

252

193

b!40

b!20

b!05

b80

b80

b!20

blSO

b200

b500

b900

893

1.030

1,110

1.200

1,090

d983

d875

768

646

Jan.

b450

bSOO

b200

b220

b240

b220

b200

b!90

blSO

b!70

b!60

b!60

b!40

b!50

b!60

b!70

b!50

b250

b500

bl.OOO

902

726

592

527

646

1,440

1,200

847

718

607

570

Month

October .......................

November ......................

December ......................

Calendar year 1940 .........

January .......................

February ......................

March .........................

April .........................

May .................. ........

June ..........................

July ..........................

August ........................

September .....................

Water year 1940-41 ..........

Feb.

507

600

600

556

527

473

441

428

409

428

726

884

638

570

493

493

422

374

397

357

334

318

318

323

357

313

313

374

_

-

~

Secondfoot-days

3,572

6,413

16,210

153,655

13,975

12,973

15,802

9,632

15,065

10,722

3,788

2,833

3,059

113,444

Mar.

549

1,100

1,040

977

893

856

803

638

630

600

527

480

391

357

323

351

329

374

391

368

340

329

368

345

329

329

334

334

357

374

386

Maximum

38 

1,70C

1.20C

4.22C

1,44C

884

1.10C

49:

1.76C

874

281

7£

17(

1,76C

Apr.

397

428

453

493

447

428

368

351

334

334

374

416

409

380

340

313

302

281

262

257

252

247

238

224

224

215

215

215

215

220

~

May

228

257

266

291

345

556

428

441

416

368

362

368

313

403

380

345

1,010

1,760

1,010

794

646

541

473

397

340

334

345

374

351

357

578

Minimum

63

60

80

31

140

313

323

215

228

193

71

71

71

60

June

607

654

520

397

397

397

380

549

520

434

357

323

302

291

291

866

852

876

896

291

262

233

806

197

197

197

193

197

874

466

~

Mean

115

214

523

420

451

463

510

321

486

357

122

72.0

102

311

July

281

224

210

215

215

185

156

149

134

131

124

114

114

104

104

98

98

95

92

89

84

79

76

76

71

71

71

71

89

92

76

Per 

square 

mile

0.274

.510

1.25

1.00

1.07

1.10

1.21

.764

1.16

.850

.290

.171

.243

.740

Aug.

73

73

73

73

73

73

71

71

71

71

71

71

73

73

73

73

71

71

71

71

71

71

79

73

73

71

71

71

71

71

71

Sept

71

71

73

98

131

95

89

81

71

79

120

124

176

168

160

168

104

98

104

138

127

98

98

79

76

76

73

71

71

71

~

Runoff

Inches

0.32

.57

1.44

13.61

1.23

1.14

1.40

.85

1.34

.95

.33

.20

.27

10.04

Acre feet

7,080

12,720

32,150

304,800

27,720

25,730

31,340

19,100

29,880

21,270

7,510

4,430

6,070

225,000

« Winter discharge measurement made on this day.

b Stage-discharge relation affected by ice.

d Doubtful gage-height record; discharge interpolated.
174 SPOKANE RIVER BASIN

Hayden Lake at Hayden Late, Idaho

Location.- Staff gage, lat. 47°46', long. 116°45', In sec. 18, T. 51 N., R. 3W., at 

 Avonaaie and Hayden Late pumping plants, a quarter of a mile north of Bozanta Tavern. 

Datum of gage is 2,200.21 feet above mean sea level (general adjustment of 1929).

Recprds available.- May 1920 to September 1941.

Extremes.- Maximum gage height observed during year, 25.24 feet June 8-10; minimum observed, 21.59 feet Sept. 30.

1920-41: Maximum gage height, 40.62 feet (present datum), Apr. 30 to May 18, 1921; 

minimum observed, 19.38 feet Dec. 16, 1931.

Remarks.- Gage read once daily. Water is pumped from lake for irrigation and domestic 

supply.

Gage height, In feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

22.04

22.06

22.06

22.06

22.06

22.04

22.02

22.00

21.98

21.96

21.94

21.92

21.91

21.89

21.87

21.86

21.84

21.82

21.80

21.79

21.78

21.77

21.75

21.74

21.75

21.78

21.82

21.82

21.82

21.88

21.82

NOV.

21.82

21.84

21.84

21.82

21.80

21.80

21.80

21. S2

21. S4

21.83

21.82

21.80

21.78

21.76

21.74

21.72

21.70

21.69

21.68

21.66

21.67

21.67

21.66

21.64

21.64

21.64

21.64

21.66

21.70

21.71

Dec.

21.72

21.72

21.71

21.70

21.72

21.74

21.74

21.74

21.73

21.72

21.72

21.71

21.70

21.68

21.67

21.66

21.66

21.66

21.65

21.66

21.72

21.74

21.78

21.80

21.86

21.92

22.00

22.06

22.10

22.14

22.17

Jan.

22.19

22.20

22.20

22.19

22.20

22.22

22.22

22.22

22.22

22.22

22.22

22.22

22.21

22.22

22.23

22.23

22.23

22.28

22.38

22.50

22.60

22.66

22.66

22.72

22.76

22.84

22.90

22.95

22.98

23.01

23.04

Feb.

23.06

23.12

23.14

23.16

23.19

23.21

23.23

23.25

23.28

23.31

23.36

23.39

23.42

23.45

23.48

23.50

23.52

23.53

23.54

23.55

23.55

23.55

23.56

23.58

23.60

23.60

23.62

23.65

_

-

Mar.

23.68

23.76

23.88

24.00

24.10

24.18

24.24

24.28

24.32

24.35

24.38

24.41

24.43

24.44

24.46

24.47

24.48

24.50

24.52

24.53

24.54

24.56

24.58

24.59

24.60

24.61

24.61

24.61

24.62

24.63

24.64

Apr.

24.65

24.66

24.68

24.70

24.73

24.74

24.75

24.75

24.75

24.75

24.75

24.75

24.76

24.76

24.76

24.75

24.74

24.73

24.72

24.71

24.70

24.70

24.70

24.69

24.68

24.67

24.67

24.66

24.65

24.65

-

May

24.64

24.65

24.66

24.66

24.68

24.68

24.68

24.69

24.68

24.68

24.67

24.68

24.68

24.71

24.74

24.76

24.77

24.86

24.94

25.02

25.06

25.09

25.10

25.12

25.12

25.11

25.11

25.11

25.12

25.15

25.19

June

25.20

25.21

25.23

25.23

25.22

25.22

25.22

25.24

25.24

25.24

25.23

25.23

25.22

25.21

25.21

25.20

25.18

25.17

25.16

25.14

25.11

25.08

25.04

25.02

24.97

24.94

24.90

24.90

24.94

24.92

-

July

24.92

24.91

24.90

24. SB

24.86

24.83

24.80

24.76

24.68

24.62

24.57

24.53

24.48

24.42

24.36

24.30

24.26

24.22

24.15

24.08

24.01

23.94

23.86

23.80

23.76

23.69

23.64

23.60

23.53

23.46

23.40

Aug.

23.32

23.24

23.18

23.12

23.06

23.00

22.95

22.90

22.86

22.81

22.76

22.68

22.62

22.56

22.52

22.48

22.44

22.39

22.34

22.28

22.24

22.19

22.14

22.10

22.05

22.02

22.02

22.01

21.98

21.94

21.92

Sept.

21.88

21. S6

21.86

21.84

21.82

21.80

21.78

21.78

21.78

21.77

21.76

21.74

21.72

21.70

21.70

21.68

21.68

21.70

21.74

21.73

21.72

21.71

21.70

21.68

21.66

21.65

21.63

21.62

21.60

21.59

~
SPOKANE RIVER BASIN 

Spokane Valley Farais Co.'s canal at Post Falls, Idaho

175

Location.- Water-stage recorder, lat. 47°43', long. 116°57', In sec. 3, T. 50 N., R. 5 

W., 300 feet downstream from headgate and half a mile northwest of Post Falls.

Records available.- May 1911 to September 1917, September 1919 to September 1941.

Extremes.- Maximum discharge recorded during year, 268 second-feet June 26 (gage height, 

5.45 reet present datum); no flow Dec. 7-30, Jan. 3 to Feb. 28.

1911-17, 1919-41: Maximum discharge observed, 304 second-feet May 28, 1936; no 

flow during non irrigation seasons.

Remarks.- Records good except those for period of no gage-height record, which are poor, 

canal diverts water for Irrigation from Spokane River in SEi sec. 3, T. 50 N., R. 5

Cooperation.- Observers services furnished by Spokane Valley Farms Co. Results of eight 

ciiscnarge measurements furnished by Washington Water Power Co.

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Oct.

10

10

10

10

11

11

10

10

8

4

4

4

4

4

4

4

4

4

4

4

4

22 4

23 ' 4

24 4

25 4

26 i 4

27 4

28 ' 4

29 4

30 4

31 4

Nov.

4

4

4

4

4

4

4

4

4

4

4

4

4

3

3

3

3

3

3

2

1

1

1

1

1

1

1

1

1

1

-

Dec.

1

1

1

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

Jan.

2

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Feb.

Month

October. ...................................

November ...................................

December. ..................................

Calendar year 1940 ......................

January ....................................

February ...................................

March. .....................................

April ......................................

May. .......................................

Jnne .......................................

July. ......................................

August .....................................

September ..................................

Water year 1940-41 ......................

Mar.

 al

' 

a£

3

3

3

3

3

3

3

Apr.

3

3

3

3

2

2

2

3

3

3

36

89

100

99

100

100

100

100

100

100

100

129

147

147

148

149

150

151

150

150

Secondfoot-days

17S

no£}«=

7

34,606

3

0

57

2,372

7,031

7,393

7,993

7,768

2,386

35,280

May

167

179

178

176

178

180

17»|

213f

241

246

248

249*

24S

2461

247

246

24C

211

21Z

23£

240

239

239

239

246

245

241

250

256

253

252

Maximum

11

4

1

281

2

0

3

151

256

263

262

261

209

263

June

263

240

233

232

233

235

238

238

237

235

237

239

236

236

235

246

250

250

251

251

253

261

26C

259

259

26£

262

26£

25J

25V

Minimum

4

3c

c

c

(]

: 16r

23!

25!

21!

1(

(

July

259

256

254

254

255

254

255

254

253

254

253

253

253

253

257

259

261

263

269

268

262

261

261

261

261

261

261

261

269

269

269

Aug.

261

260

269

260

260

260

260

260

261

260

261

260

258

256

256

256

256

254

252

251

25]

250

251

252

250

246

236

224

218

215

215

Sept.

209

200

176

166

163

162

162

154

145

138

182

110

98

98

98

41

11

11

11

10

11

10

10

10

10

10

10

10

10

10

-

Moan Runoff in Mean acre-feet

5.7 353

2.7 163

.2 14

3 94.6 68,640

.1 6.0

3 0 0

L l.S 113

> 79.1 4,700

227 13 ,950

> 247 14,670

5 258 15 ,860

> 251 15,410

3 79.5 4,730

3 96.7 69,970

a No gage-height record January 18 to March 24; practically no flow or discharge estimated.
OKANOQAN RIVER BASIN

Okanogan River at Okanagan Falls, British Columbia 

(International gaging station)

Location.- Water-stage recorder, lat. 49°21', long. 119°35', 400 feet downstream from

 falls at Okanagan Falls, British Columbia, and 800 feet downstream from Dog Lake.

Drainage area.- 2,550 square miles.

Records available.- October 1930 to September 1941 In water-supply papers of Geological

 Survey. March 1915 to September 1930 In bulletins of Dominion Water and Power Bureau, 

Department of Mines and Resou-'ies, Canada.

Average discharge.- 26 years, 441 second-feet.

Extremes.- Maximum discharge during year, 571 second-feet Sept. 26 (gage height, 2.00 

reet); minimum, 79 second-feet May 27 (gage height, 0.72 foot).

1915-41: Maximum discharge observed, 2,680 second-feet June 10, 1928; minimum, 4.6 

second-feet Mar. 14, 1931.

Remarks.- Records good. Diversions above station for Irrigation. Flow regulated by control dam at outlet of Okanagan Lake.

Cooperation.- This station Is one of the International gaging stations maintained by 

Canada under agreement with the United States.

Rating table, water year 1940-41 (gage height, in feet, and discharge, 

in second-feet)

O.S 94 1.2 196

1.0 135 1.4 271

1.7 406

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

176

182

176

169

162

157

157

157

151

148

154

157

157

154

154

157

154

154

154

157

159

154

157

196

203

203

189

1S2

179

179

179

Nov.

176

179

176

165

162

162

179

200

196

176

172

169

165

162

165

162

169

179

172

182

186

179

176

186

186

186

19S

196

207

207

-

Dec.

203

207

207

207

211

211

211

211

214

218

218

214

Sll

207

211

214

207

207

207

211

218

222

222

226

226

229

2SS

226

229

229

226

Jan.

218

21S

218

214

214

214

214

218

211

207

214

218

222

2S7

2S7

2SS

2SS

241

241

248

244

241

241

2S7

241

241

241

244

244

241

244

Feb.

244

246

252

252

256

248

214

186

162

14S

131

124

113

124

146

179

214

252

283

300

325

343

343

347

347

356

371

386

_

_

-

Month

October. ............................. ...

Novembe r ...................................

December ...................................

Calendar year 1940 ................ .

January .............................. ....

February ............................. .....

March. ........................ ...........

April. .....................................

May. .......................................

June .............. .......................

July. ......................... ............

August .....................................

September. ....................... .........

Water year 1940-41 ......................

Mar.

406

406

406

417

422

428

422

438

433

433

433

428

433

433

438

444

449

449

455

460

460

466

471

471

471

476

482

4S8

488

482

488

Apr.

Secondfoot-days

5,167

5,370

6,693

61,785

7 129

6^889

13, 876

12,459

6,486

9,308

7,318

9,977

12,725

103,897

486

482

488

482

482

466

455

444

444

449

460

449

449

428

444

438

433

422

422

406

391

381

371

366

352

338

321

308

300

300

-

May

321

325

325

321

321

304

300

283

267

263

252

248

279

267

229

186

162

157

138

128

126

115

107

105

100

90

83

94

126

189

275

Maximum

203"

207

233

263

248

386

488

488

325

396

300

371

498

498

June

343

396

396

366

325

321

347

376

386

366

330

300

296

283

275

263

260

271

279

279

292

296

283

279

279

292

296

283

275

275

-

Minimum

148

162

203

52

207

113

406

300

83

260

176

283

352

83

July

271

271

279

296

300

296

300

283

271

263

260

256

252

244

241

222

193

176

176

186

207

222

229

226

233

252

267

271

287

292

296

Aug.

292

396

383

396

304

308

312

508

516

321

312

312

316

325

325

Mean

167

179

216

169

230

246

448

415

209

310

252

322

424

285

325

325

321

325

321

321

325

330

325

312

325

371

366

356

356

347

Sept.

356

361

352

356

356

361

361

356

356

376

396

406

417

422

428

438

444

449

460

466

466

471

476

482

482

498

493

482

482

476

"

Runoff in 

acre-feet

10,250

10,650

13,280

122,500

14, 140

13,660

27,520

24,710

12,860

18,460

15,510

19,790

25,240

206, 100
OKANOGAN RIVER BASIN 177

Osoyoos Lake near Orovllle, Wash. 

(International gaging station)

Location.- Water-stage recorder, lat. 48°59'15", long. 119°27'15", in lot 1, sec. 8, T. 

40 N., R. 27 E., on west shore, 1 mile south of international boundary and 3 miles 

north of Oroville. Datum of gage is at mean sea level, subject to correction for 

datum of 1929.

Drainage area.- 3,250 square miles.

Records available.- July 1928 to September 1941.

Extremes.- Maximum water-surface elevation during year, 915.84 feet Apr. 12; minimum, 

913.93 feet Oct. 1, 23.

1928-41: Maximum water-surface elevation, 917.23 feet Apr. 28, 1934; minimum, 

911.21 feet Oct. 14, 1929.

Remarks.- Diversion in Canada for irrigation. Okanogan River subject to natural regulation in several lakes, and to artificial regulation, as an aid to navigation in 

Okanagan Lake. Dam at Zosel's mill in Oroville may cause backwater in Osoyoos Lake.

Cooperation.- This station is one of the international gaging stations maintained by the 

United States under agreement with Canada.

Elevation, in feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

13.93

14.00

14.00

14.01

14.01

14.02

14.02

14.01

13.99

13.99

13.99

13.99

13.99

13.93

13.93

13.98

13.97

13.95

13.95

13. 9b

13.95

13.94

13.93

13.98

14.01

14.03

14.02

14.00

-

-

-

Nov.

_

-

14.05

14.05

-

_

_

14.10

14.13

-

_

-

_

-

-

.

-

-

13.99

14.00

14.01

13.99

-

-

-

_

-

-

-

-

-

Dec.

_

-

_

14.13

14.14

14. Ib

14.16

14.16

14.16

14.17

14.17

14.17

14.17

14.17

14.17

14.17

14.17

14.17

14.13

14.20

14.22

14.24

14.26

14.29

14.30

14.31

14.33

14.33

14.33

14.33

14.33

Jan.

14.32

14.30

14.29

14.27

14.26

14.25

14.24

14.23

14.22

14.23

14.22

14.21

14.21

14.21

14.22

14.22

14.23

14.24

14.25

14.25

14.26

14.27

14.27

14.27

14.27

14.23

14.28

14.29

14.29

14.27

14.27

Feb.

14.28

14.29

14.29

14.29

14.28

14.29

14.30

14.30

14.29

14.27.

14.27

14.25

14.22

14.19

14.16

14.14

14.11

14.10

14.10

14.11

14.14

14.19

14.17

14.19

14.21

14.25

14.28

14.33

-

-

-

Mar.

14.40

14.51

14.65

14.77

14.68

14. 93

15.08

15.17

15.23

15.26

15.30

15.32

15.35

15.35

15.37

15.39

15.39

15.40

15.41

15.43

15.43

15.44

15.46

15.46

15.46

15.47

15.48

15.50

15.52

15.55

15.57

Apr.

15.60

15.63

15.67

15.72

15. SO

15.30

15.80

15.73

15.77

15.79

15.30

15.80

15.79

15.76

15.75

15.73

15.70

15.65

15.61

15.57

15.54

15.50

15.49

15.46

15.43

15.40

15.38

15.37

15.37

15.37

-

May

15.40

15.42

 15.46

15. 18

15.43

15.47

15.43

15.39

15.34

15.29

15.25

15.22

15.18

15.15

15.10

15.05

15.02

14.99

14.92

14.36

14.31

14.75

14.67

14.62

14.56

14.49

14.41

14.38

14.39

14.37

14.39

June

14.44

14.50

14.56

14.57

14.60

14.66

14.76

14.33

15.02

15.11

15.17

15.19

15.19

15.15

15.14

15.14

15.11

15.10

15.14

15.16

15.19

15.18

15.14

15.10

15.10

15.10

15.07

15.02

15.00

14.93

-

July

14.96

14.94

14.92

14.90

14.38

14.35

14.31

14.76

14.73

14.68

14.64

14.60

14.55

14.50

14.47

14.43

14.39

14.34

14.30

14.26

14.22

14.16

14.11

14.05

14.03

14.03

14.02

14.00

14.01

14.00

14.00

Aug.

13.96

13.95

13.94

13.96

13.99

14.01

14.03

14.03

14.06

14.09

14.11

14.13

14.14

14.16

14.19

14.20

14.20

14.22

14.24

14.26

14.27

14.29

14.30

14.31

14.32

14.40

14.50

14.56

14.60

14.64

14.66

Sept.

14.70

14.72

14.76

14.30

14.31

14.62

14.82

14.81

14.83

14.89

14.95

15.00

15.06

15.09

15.13

15.16

15.13

15.20

15.27

15.29

15.32

15.35

15.36

15.36

15.36

15.36

15.35

15.35

15.35

15. 3b

-

Note.- Add 900 feet to obtain elevation above mean sea level.
178 OKANOGAN RIVER BASIN

Okanogan River near Tonasket, Wash. 

(International gaging station)

Location.- Water-stage recorder, lat. 48°38'00", long. 119°27'50", In lot 3, sec. 6, T. 

36 N., R. 27 E., 1,000 feet upstream from Chewlllken Creek and 5i miles south of 

Tonasket.

Drainage area.- 7,250 square miles.

Records available.- April 1929 to September 1941. May 1911 to September 1925 (equivalent 

records at site a quarter of a mile upstream from SaLnon Creek at Okanogan, published 

as Okanogan River at Okanogan) In reports of Geological Survey. June 1911 to 

September 1933 In State Water-Supply Bulletin 5.

Average discharge.- 26 years (1911-25, 29-41), 2,668 second-feet.

Extremes.- Maximum discharge during year, 5,180 second-feet May 2, 3; maximum gage 

height, 9.81 feet May 3; minimum discharge, 374 second-feet Oct. 1, 3.

1911-25, 29-41: Maximum discharge recorded, 25,400 second-feet Apr. 27, 1934 (gage 

height, 18.3 feet); minimum recorded, 126 second-feet Sept. 5, 1931 (gage height, 3.43 

feet).

Remarks.- Records excellent except those for periods of Ice effect, which are poor, and 

those for periods of no gage-height record and shifting control, which are fair. Many 

diversions above station for Irrigation. Flow subject to natural regulation In several 

lakes, and as an aid to navigation, to artificial regulation In Okanagan Lake. Power 

plant on Slmllkameen River affects low flow slightly.

Cooperation.- This station Is one of the International gaging stations maintained by the 

united States under agreement with Canada.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

28

27

28

29

30

31

Oct.

413

417

417

545

570

565

555

580

575

570

55.0

560

586

744

732

738

720

696

690

690

708

f808

f 1,020

f 1,060

f985

f985

f985

f950

a900

aS60

a850

Nov.

f848

f84S

f848

aS40

a820

aSOO

a820

«815

776

750

664

b670

b620

b590

b570

565

618

652

684

702

690

690

679

668

646

668

684

708

708

708

-

Dec.

714

73S

732

726

732

732

73S

744

744

744

b730

b710

b670

630

b590

b550

555

596

708

744

880

985

S48

848

848

802

782

796

776

770

756

Jan.

744

732

702

674

646

b67O

b670

679

696

696

*702

702

690

708

738

684

720

720

720

714

70S

708

708

708

714

708

696

690

690

6S4

679

Feb.

708

714

714

726

714

702

70S

696

702

732

738

714

702

«690

690

652

635

630

630

646

646

646

630

652

630

646

750

782

_

_

-

Month

October . ...................................

November . ..................................

December . ..................................

Calendar year 1940 ......................

January ....................................

February. ..................................

March.. ....................................

April. .....................................

May........................................

June .......................................

July .......................................

August .....................................

September. .................................

Water year 1940-41 ......................

liar.

915

808

640

602

613

613

635

652

738

796

815

815

84S

848

880

880

915

915

985

1,060

1,060

1,100

1,100

1,060

1,100

1,100

1,100

1,220

1,440

1,630

1,780

Apr.

1,940

2,160

2,400

2,720

2,340

2,720

2,650

2,580

2,530

2,720

2,910

3,120

3,190

3,190

3,190

3,330

3,260

3,120

3,050

2,930

2,910

2,980

3,120

3,330

3,480

3,630

3,700

3,780

3,940

4,100

-

Secondfoot-days

22,024

21,369

22,913

433,234

' 21,700

19,225

29, 663

91,620

117,490

111,610

43,154

20,522

44,750

571,045

Bay

4,530

4,990

5,130

4,990

4,300

4,360

4,100

3,360

3,630

3,480

3,330

3,330

3,860

4,300

4,440

4,100

3,940

3,780

3,700

3,460

3,260

3,190

3,120

3,120

3,260

3,330

3,190

3,050

3,050

3,120

3,120

Maximum

1,060

348

985

7,360

744

782

1,780

4,100

5,130

4,990

2,530

985

2,050

5,130

June

3,330

3,700

3,560

3,400

3,260

3,190

3,400

4,180

4,990

4,800

4,620

4,440

4,440

4,620

4,440

4,270

4,180

4,100

4,020

4,020

3,700

3,480

3,330

3,120

3,120

2,980

3,910

2,780

2,650

2,580

-

Minimum

413

565

550

162

646

630

602

1,940

3,050

2,530

776

550

950

413

July

2,530

2,580

2,520

2,460

2,400

2,230

2,160

2,160

2,100

1,940

1,830

1,730

1,680

1,630

1,480

1,350

1,260

1,220

1,100

1,060

1,100

1,060

985

985

1,020

1,060

1,020

915

84S

315

776

Aug.

744

702

634

6S4

690

634

640

608

602

586

580

565

550

555

5S6

652

640

635

613

591

570

570

550

560

560

618

738

880

950

985

Mean

710

712

739

1,320

700

6S7

957

3,054

3,790

3,720

1,553

662

1,492

1,565

950

Sept.

950

950

950

950

1,020

1,020

1,020

1,020

1,060

1,100

1,180

l',260

1,350

1,440

1,480

1,630

1,730

1,940

2,050

2,000

2,000

2,000

1,940

1,880

1,330

1,330

1,780

1,730

1,330

1,830

~

Runoff in 

acre-feet

43,630

42,380

45,460

958,600

43,040

38,130

68,340

181,700

233,000

221,400

95,510

40,700

88,760

1,133,000

* Winter-discharge measurement made on this day.

a No gage-height record; discharge computed on basis of records for Similkameen River near 

Nighthawk.

b Stage-discharge relation affected by ice.

f Computed on basis of partly estimated gage-height record.

Note.- Shifting-control method used Oct. 1 to May 4, July 9 to Sept. 21.
OKANOGAN RIVER BASIN 179

Similkaineen River near Nighthawk, Wash. 

(International gaging station)

Location.- Water-stage recorder, lat. 48°59'10", long. 119°37'00", in NWi sec. 7, T. 40 

WT, R". 26 E., about 1J miles downstream from Nighthawk and 12 miles upstream from 

mouth.

Drainage area.- 3,430 square miles.

Records available.- September 1928 to September 1941. May 1911 to September 1928 (mean 

monthly discharge including that of Oroville-Tonasket Irrigation District canal) at 

site 4 miles upstream from Oroville, published as Slmilkaneen River near Oroville.

Average discharge.- 30 years, 3,063 second-feet.

Extremes.- Maximum discharge during year, 4,750 second-feet May 2, June 8; maximum gage 

height, 7.23 feet June 8; minimum discharge, 195 second-feet Dec. 16 (gage height, 

2.54 feet).

1928-41: Maximum discharge, 27,200 second-feet Apr. 26, 1934 (gage height, 14.96 

feet); minimum, 120 second-feet Jan. 6, 1930 (gage height, 2.05 feet).

Remarks.- Records excellent except those below 500 second-feet, which are good. Flow 

at high stages regulated by natural diversion Into and release from Palmer Lake. 

Small diversions above station for irrigation.

Cooperation.- This station is one of the international gaging stations maintained by the 

United States under agreement with Canada.

Rating table, water year 1940-41, except period of Ice effect (gage height, in feet, 

and discharge, in second-feet)

2.6 215 3.2 470 4.0 950 5.5 2,430 

2.8 292 3.5 626 4.5 1,380 6.0 3,040 

3.0 37S 3.7 745 5.0 1,S70 7.0 4,430

Discharge, in second-feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24

25

26 

2Ti 

28

29 

30 

31

Oct.

313 

296 

309 

330 

330

317 

300 

292 

284 

276

280 

309 

456 

442 

428

418 

423 

418 

400 

446

626 

880 

915 

790 

758

790 

745 

684 

655 

632 

632

Nov.

610 

598 

593 

571 

550

529 

*550 

535 

524 

446

400 

313 

284 

276 

276

334 

369 

423 

428 

418

423 

418 

378 

387 

405

423 

437 

446 

442 

428

Dec.

432 

432 

432 

432 

446

461 

465 

465 

465 

470

432 

392 

321 

305 

bE75

256 

268 

b290 

321 

437

485 

514 

499 

480 

480

470 

465 

451 

446 

442 

428

Jan.

410 

374 

330 

309 

b330

b340 

365 

382 

387 

392

396 

382 

*392 

400 

396

392 

396 

396 

392 

387

387 

382 

374 

374 

374

369 

369 

369 

365 

356 

356

Feb.

360 

374 

378 

382 

379

374 

360 

365 

374 

374

365 

360 

360 

347 

*317

300 

309 

317 

326 

326

330 

305 

317 

296 

321

343 

352 

352

Unvt+h Second 

Month foot-days

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Bare 

Apr! 

May 

June 

July 

Augu 

Sept

Wa

lendar year 1940 ......

ary

5,174 

3,214 

2,957

421,546

.......... 1

1 '

.......................... 1C

.

ember ..................... !

1,623 

9,662 

7,811 

^4,460 

)6,140 

)1,330 

W,834 

8,206 

12,268

ter year 1940-41 .......... 453,679

Mar.

369 

260 

378 

410 

418

414 

410 

414 

428 

442

442 

442 

442 

451 

456

470 

490 

535 

588 

626

620 

610 

598 

593 

588

604 

678 

845 

1,070 

1,240 

1,380

Maximum

915 

610 

514

7,350

410 

382 

1,380 

3,840 

4,750 

4,590 

2,260 

721 

1,620

4,750

Apr.

1,620 

1,770 

2,140 

2,310 

2,140

1,920 

1,320 

1,320 

1,370 

2,040

2,370 

2,490 

2,490 

2,490 

2,490

2,610 

2,490 

2,370 

2,260 

2,200

2,260 

2,430 

2,670 

2,910 

3,040

3,170 

3,300 

3,430 

3,700 

3,840

May

4,290 

4,750 

4,590 

4,280 

3,9SO

3,700 

3,430 

3,170 

3,040 

2,850

E.790 

3,040 

4,130 

4,280 

3,840

3,700 

3,560 

3,430 

3,300 

3,040

2,910 

2,910 

2,850

E,980 

3,170

3,170 

3,040 

2,980 

2,980 

2,980 

2,9SO

Minimum

276 

276 

256

202

309 

296 

360 

1,620 

2,790 

E,200 

702

r 461

643

256

June

3,430 

3,430 

3,300 

3,170 

2,9SO

3,040 

3,560 

4,590 

4,590 

4,430

4,130 

4,130 

4,E80 

4,230 

3,980

3,840 

3,700 

3,560 

3,560 

3,430

3,170 

2,980 

2,790 

2,670 

2,610

E,550 

2,430 

2,260 

2,200 

2,260

Mean

489 

440 

418

1,152

375 

345 

575 

2,482 

3,424 

3,378 

1,317 

587 

1,076

1,243

July

2,260 

2,140 

2,090 

2,090 

1,980

1,870 

1,820 

1,S70 

1,770 

1,620

1,520 

1,420 

1,340 

1,290 

1,200

1,110 

1,030 

950 

950 

1,070

1,030 

950

380 

880 

880

915

380 

810 

778 

739 

702

Per 

square 

mile

0.143 

.129 

.122

.337

.110 

.101 

.168 

.726 

1.00 

.988 

.385 

.172 

.315

.363

Aug.

637 

649 

661 

678 

690

6S4 

661 

620 

593 

566

540 

524 

529 

566 

620

626 

568 

555 

519 

499

485 

470 

470 

465 

461

480 

566 

667 

696 

721 

690

Sept.

661 

643 

667 

721 

714

690 

684 

696 

714 

758

845 

915 

990 

1,070 

1,160

1,290 

1,380 

1,620 

1,520 

1,470

1,420 

1,420 

1,380 

1,290 

1,290

1,240 

1,200 

1,240 

1,290 

1,290

Runoff

Inches Acre-feet

0.17 30,100 

.14 26,210 

.14 25,700

4.58 836,100

.13 23,050 

.11 19,160 

.19 35,330 

.81 147,700 

1.15 210,500 

1.10 201,000 

.44 80,990 

.20 36,110 

.35 64,000

4.93 899,800

* Winter-discharge measurement made on this day. 

b Stage-discharge relation affected by ice.
180 METHOW RIVER BASIN 

Methow River at Twisp, Wash.

Location.- Water-stage recorder, lat. 48°21'40", long. 120°06'50", in sec. 17, T. 33 N., 

 RT~S2~~E., at highway bridge at Twisp, a quarter of a mile downstream from Twisp River.

Drainage area.- 1,330 square miles.

Records available.- June 1919 to September 1929, October 1933 to September 1941.

Average discharge.- 18 years, 1,153 second-feet.

Extremes.- Maximum discharge during year, 5,240 second-feet May 2 (gage height, 6.10 

feet); minimum, 215 second-feet Oct. 1.

1919-29, 1933-41: Maximum discharge observed, 15,200 second-feet Apr. 24, 25, 1934; 

maximum gage height observed, 10.4 feet June 5, 1921; minimum discharge observed, 134 

second-feet Sept. 4, 5, 1926, Sept. 9, 10, 1929 (gage height, 1.42 feet), but may have 

been less sometime during period of ice effect, Jan. 6 to Mar. 4, 1937.

Remarks.- Records excellent except those for period of shifting control, which are good, 

and those for periods of no gage-height record or ice effect, which are poor. Water 

diverted above station for irrigation by two canals of Methow Valley Irrigation District, by Risley ditch, and by many other ditches.

Rating table, water yea 1940-41, except periods of ice effect {gage height, in 

st, and discharge, in second-feet)

{Shifting-control

1.7 240

2.0 345

2.5 600

ed Oct. 1 to Dec. 2S)

3.0 940

3.5 1,380

4.0 1,930

4.5 2,550

5.0 3,230

6.0 5,020

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

225

230

230

228

230

228

222

222

240

246

252

252

261

264

264

267

261

262

262

277

360

381

381

455

600

588

552

524

512

507

490

Nov.

507

490

465

455

440

440

480

465

435

408

408

390

376

394

394

394

404

394

386

390

386

358

368

368

368

358

354

368

372

354

-

Dec.

345

345

345

345

341

341

333

333

329

291

270

b265

b270

b275

b280

0286

0290

298

305

313

325

345

337

333

329

329

321

313

a310

a300

a300

Jan.

a290

a280

a270

a275

a280

a280

a285

a290

a290

#294

291

277

291

294

291

291

298

291

284

277

b260

b275

b280

280

280

277

274

274

264

267

274

Feb.

277

274

270

274

274

270

277

274

274

274

277

274

274

261

*261

264

264

264

264

264

267

264

261

270

264

270

270

277

-

-

-

Mar.

325

337

337

337

341

341*

341

345

368

372

376

386

«386

390

394

426

518

624

692

712

718

725

732

732

753

823

956

1,090

1,240

1,430

1,640

Apr.

1,760

2,290

2,740

2,740

2,480

2,360

2,230

2} 170

2,230

2,620

2,680

2,810

2,740

2,680

2,810

2,680

2,550

2,360

2,290

2,230

2,290

2,550

2,950

3,160

3,300

3,460

3,610

3,770

4,020

4,390

-

May

5,020

5,020

4,490

3,940

3,530

3.090

2,810

2,620

2,360

2,230

2,360

3,160

4,110

3,850

3,530

3,230

3,300

3,020

' 2,680

2,480

2,360

2,360

2,620

3,090

3,460

3,230

3,020

2,880

2,950

2,680

3,090

June

3,770

3,460

3,230

3,090

3,020

3,230

4,390

4,200

3,610

3,380

3,460

3,690

3,940

3,610

3,230

2,880

2,810

2,680

2,550

2,290

2,050

1,930

1,930

1,810

1,700

1,540

1,430

1,330

1,540

1,540

-

July

1,480

1,380

1,330

1,280

1,190

1,090

1,090

1,030

910

816

781

760

712

666

630

552

524

524

546

524

496

460

440

440

475

455

426

394

381

376

350

Aug.

333

321

329

358

368

345

325

317

302

291

277

291

305

298

298

333

321

305

280

258

249

243

240

238

235

258

358

446

466

445

426

Sept.

426

460

564

570

546

518

496

490

480

583

753

725

725

725

718

712

774

781

788

830

823

795

774

767

746

725

712

692

686

880

-

Month

April ......................................

May. ................. .....................

Water year 1940-41 ......................

Secondfoot-days

10,243

12,169

9,741

338, 153

8,724

7,548

19 , 187

82,950

98, 570

83,320

22,508

9,857

20,064

384, 881

Maximum

600

507

345

8,500

298

277

1,640

4,390

5,020

4,390

1,480

465

830

5,020

Minimum

222

354

265

162

260

261

325

1,760

2,230

1,330

350

235

426

222

Mean

330

406

314

924

281

270

619

2,765

3,180

2,777

726

318

669

1,054

Runoff in 

acre-feet

20,320

24,140

19,320

670,700

17,300

14,970

38,060

164,600

195,500

165,300

44,640

19,560

39,800

763,400

* Winter-discharge measurement made, on this day.

a No gage-height record; discharge computed on basis of records for Stehekin River at Stehekln.

b Stage-discharge relation affected by ice.
CHELAN RIVER BASIN 181

Stehekin River at Stehekln, Wash.

Location.- Water-stage recorder, lat. 48°19'50", long. 120°41 I 40", In SEi sec. 26, T. 33

 N!, R. 17 E., 1,200 feet upstream from Boulder Creek and 2 miles upstream from Lake 

Chelan and Stehekln.

Drainage area.- 372 square miles, including that of Boulder Creek.

Records available.- October 1910 to October 1915 and January 1927 to September 1941 (Inelude now or Boulder Creek).

Average discharge.- 19 years, 1,330 second-feet.

Extremes.- Maximum discharge during year, 4,210 second-feet Oct. 19 (gage height, 22.97

 feet); minimum, 214 second-feet Feb. 15 (gage height, 19.04 feet).

1910-15. 1927-41: Maximum discharge, 12,900 second-feet June 2, 1936 (gage height, 

27.18 feet), from rating curve extended above 8,500 second-feet; minimum, 56 secondfeet Jan. 12, 1930.

Remarks.- Records good except those for period of no gage-height record, which are fair.

 At very high stages small part of flow Is diverted above gage by natural sloughs; 

quantity diverted included in daily discharge.

Cooperation.- Gage-height record collected in cooperation with Washington Water Power 

Co., whlch also furnished results of seven discharge measurements.

Rating table water year 1940-41 (gage height, In feet, and discharge. 

In second-feet)

19.1 230 20.0 653 21.5 2,040 

19.3 294 20.3 867 22.0 2,690 

19.5 375 20.6 1,110 

19.7 475 21.0 1,490

Discharge, in second- feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

485 

370 

350 

326 

302

2S2 

275 

272 

279 

1,710

1,220 

640 

616 

532 

502

435 

530 

2,450 

2,9SO 

2,900

2,4SO 

1,540 

1,290 

1,640 

1,290

1,070 

907 

S14 

765 

751 

716

Nov.

660 

634 

5S6 

544 

526

514 

532 

514 

4SO 

435

430 

410 

395 

3S5 

375

375 

370 

354 

342 

33S

330 

302 

314 

318 

302

294 

302 

a315 

a327 

a340

Dec.

a353 

366 

395 

420 

420

410 

415 

475 

4S5 

445

395 

366 

358 

370 

390

362 

35S 

366 

35S 

354

33S 

35S 

342 

33S 

334

330 

326 

326 

318 

314 

314

Jan.

302 

269 

290 

286 

2S2

275 

272 

269 

266 

260

257 

254 

254 

257 

254

257 

269 

266 

257 

251

242 

251 

245 

245 

248

245 

236 

236

233 

230 

239

Feb.

239 

233 

23O 

227 

227

224 

224 

224 

227 

230

233

233 

230 

224 

221

227 

227 

230 

236 

242

245 

248 

251 

257 

263

263 

266 

272

£££.

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

Hay 

June 

July 

Augu 

Sept

Wa

mber ......................

lendar year 1940 

ary

30, 719 

12,343 

11,499

......... 446.426

ember .....................

7,997 

6,653 

25,029 

70,240 

70,570 

60.S50 

37,343 

21, 149 

19, 670

ter year 1940-41 .......... 374,062

Har.

306 

334 

330 

334 

338

354 

380 

450 

450 

460

475 

490 

508 

520 

556

667 

S35 

923 

923 

S83

867 

883 

867 

867 

939

1,120 

1,340 

1,590 

1,610 

2,040 

2 220

Maximum

2,980 

660 

4S5

7,020

302 

272 

2,220 

3,570 

3.S10 

3,500 

1,640 

1,140 

1,110

3,810

Apr.

2,420 

3,420 

3,040 

2,550 

2,220

1,9SO 

1,S10 

1,760 

1.9SO 

2,040

2,040 

1.9SO 

1.9SO 

1,980 

2,100

1.S60 

1,700 

1,590 

1,540 

1,640

1,920 

2,290 

2,620 

2,760 

2,900

3,040 

3,120 

3,120 

3,270 

3,570

Hay

3.S10 

3,340 

2,830 

2,420 

2,040

1.S10 

1,640 

1,490 

1,390 

1,440

1,810 

3,500 

3,270 

2,620 

2,220

2,100 

2,290 

1,920 

1,700 

1,540

1,590 

1,860 

2,480 

3,340 

3,200

2,620 

2,220 

2,100 

1,860 

1,760 

2,360

June

2,420 

2,290 

2,220 

2,220 

2,220

2,420 

2,550 

1,920 

1,760 

1,9SO

2,830 

3,500 

3,340 

2,620 

2,380

1,980 

1,860 

1,760 

1,590 

1,390

1,340 

1,700 

1.9SO 

1,640 

1,390

1,240 

1,390 

1,590 

1,760 

1,590

Minimum Mean

272 991 

294 411 

314 371

240 1,220

230 258 

221 238 

306 807 

1,540 2,341 

1,390 2,276 

1,240 2,02S 

737 1,205 

420 682 

425 656

221 1,025

Peak discharge.- Oct. 19 (4:45 p.m.) 4,210 sec. -ft.; May 12 (lOrt.5 p.m.

July

1, 

1, 

1, 

1, 

1,

1, 

1, 

1, 

1, 

1,

1, 

1, 

1, 

1, 

1,

1,

1, 

1, 

1, 

1,

1,

Per 

square 

mile

2.66 

1.10 

.997

3.28

.694 

.640 

2.17 

6.29 

6.12 

5.45 

3.24 

1.83 

1.76

2.76

540 

540 

640 

540 

440

490 

590 

290 

170 

090

130 

160 

240 

290 

440.

540 

590 

590 

490 

240

060 

683 

779 

766 

737

828 

899 

939 

821 

793 

758

Aug.

667 

610 

604 

568 

568

628 

695 

737 

821 

765

793 

1,140 

028 

751 

807

709 

716 

737 

758 

793

S28 

765

SOO 

568 

514

514 

550 

490 

455 

420 

550

Sept.

580 

622 

S77 

987 

622

544 

496 

425 

450 

912

556 

514 

634 

891 

681

1,110 

1,070 

779 

667 

616

544

520 

556 

580 

568

793 

556 

485 

485 

550

Runoff

Inches

3.07 

1.23 

1.15

44.63

.80 

.67 

2.50 

7.02 

7.06 

6.08 

3.73 

2.11 

1.97

37.39

4,050 sec. -ft.

Acre-feet

60,930 

24,480 

22, 810

835,500

15,360 

13,200 

49,640 

139,300 

140,000 

120,700 

74, 070 

41,950 

39,010

742,000

May 24

(10:30 p.m.) 3,970 sec.-ft.; June 12 (9:45 p.m.) 4,050 sec.-ft. 

a No gage-height record; discharge interpolated;
182 CHELAN RIVER BASIN

Lake Chelan at Chelan, Wash.

Location - Water-stage recorder, lat. 47°50'00", long. 120°03'40", in lot 3, sec. 15, T.

 27 N.,' R 22 E., 2 miles west or Chelan. Datum or- gage is at mean sea level, adjustment '6r i912.

Drainage area.- 950 square miles. -, -, Records available.- September 1897 to December 1899, January to June 1905, December 1910 

co September 1941.

Extremes.- Maximum elevation during year, 1,100.0 reet June 22, July 18; minimum, 1,085.7

ee i897-99, 1905, 1910-41: Maximum elevation, 1,100.0 reet July 19, 1937, July 1, 8, 

1938, July 28, 1939, June 19, 1940, June 22, July 18, 1941; minimum, 1,076.78 feet Jan. 

PV P8 Dsc 2 3 1898 Remarks.-'Reservoir is formed by low concrete dam at lake outlet, completed Sept. 3, 1927.

 Capacity, 676,100 acre-reet between elevations 1,079 and 1,100 feet above mean sea 

level. Regulation between these elevations is allowed by stipulation or Federal Power 

Commission. Water is used for power development. Elevation or lake maintained between 

elevation 1,092 and 1,100 reet above mean sea level during period Aug. 16 to Sept. 15 

for scenic efrect and recreational purposes. Cooperation.- Gage-height record collected in cooperation with Washington Water Power Co.

Capacity table (elevations, In feet, and usable capacity, in acre-feet)

1,079.0 0 1,034.0

1,079.5 15,700 1,086.0

1,080.0 31,400 1,038.0

1,031.0 62,900 1,090.0

1,082.0

Note.- 

and fun

158,000 

221,SOO 

2S5,800 

350,200 

415,000

1,094.0

1,097.0

1,100.0

480,000

577,800

676,100

!.0 94,500 1,092.0 415,000

;e.- Computed by Geological Survey from surface areas, determined

*urnlshed by Washington Water Power Co.

Elevation, in feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

93.88

93.84

93.65

93.52

93.39

93.30

93.22

93.14

93.01

92.96

92.99

92.93

92.85

92.80

92.70

92.60

92.50

92.48

92.53

92.59

92.67

92.65

92.60

92.67

92.64

92.57

92.50

92.43

92.35

92.28

92.21

Nov.

92.12

92.05

91.97

91. S4

91.74

91.65

91.61

91.52

91.39

91.29

91.17

91.08

90. 9S

90. 8S

90. 7S

90.67

90.56

90.47

90.33

90.22

90.12

90.00

89.87

89.78

89.66

89.54

89.43

89.35

89.32

89.27

Dec.

S9.26

89.25

S9.20

S9.ll

89.06

89.03

89.01

89.03

S9.03

68.97

88.93

S3. 88

88.79

S8.67

88.56

8S.44

88.32

88.25

88.16

88.12

88.09

8S. 11

88.12

88.16

8S.17

S8.20

SS.20

S8.17

SS.18

S8.14

S8.08

Jan.

8S.06

88.02

87.96

87.91

S7.88

87. S5

87.80

87.76

87.70

87.64

87. 5S

S7.47

87.36

87.29

S7.23

87.18

S7.18

S7.17

87.15

87.12

87.10

87.04

87.00

86.98

86.96

86.94

86.93

86.89

86.83

86.77

86.75

Feb.

86.73

86.70

86.70

86.70

S6.65

86.60

86.54

S6.49

S6.47

S6.44

86.43

86.40

86.35

86.32

86.28

86.27

86.25

86.18

86.11

86.05

86.00

S5.96

85.93

S5.92

85.87

85.84

S5.81

S5.80

_

-

Mar.

S5.85

S5.88

S5.89

S5.88

S5.86

S5.S5

85. S3

85. S4

S5.81

85. S3

85.81

S5.77

85.76

85.74

85.73

85.76

85.77

85.78

85.80

85.80

85.78

85.83

85.86

85.88

85.89

85.93

85.98

86.06

86.16

S6.30

86.43

Apr.

S6.57

86.83

S7.02

S7.21

87.38

S7.52

S7.65

S7.77

S7.95

8S.13

88.32

88.50

88.64

88.79

89.01

89.14

89.27

89.41

89.54

89.68

89.83

90.00

90.21

90.42

90.65

90.90

91.17

91.45

91.75

92.05

-

May

92.38

92.69

92.98

93.21

93.41

93.59

93.73

93. S9

94.00

94.12

94.28

94.53

94.84

95.11

95.31

95.49

95.71

95.93

96.08

96.24

96.34

96.49

96.67

96.92

97.24

97.47

97.68

97.84

98.05

9S.21

98.44

June

98.68

9S.S5

99.03

99.20

99.32

99.44

99.69

99.66

99.65

99.61

99.69

99.86

99.89

99.75

99.62

99.54

99.60

99.73

99.83

99. S6

99.89

99.94

99.87

99.84

99.90

99.90

99.92

99.90

99.95

99.94

-

July

99.94

99.93

99.95

99.92

99.93

99.92

99.96

99.89

99.84

99.79

99.79

99.75

99.72

99.73

99.78

99.84

99.92

99.92

99.91

99.90

99.87

99.84

99.75

99.66

99.57

99.52

99.48

99.47

99.45

99.36

99.30

Aug.

99.26

99.15

99.03

99.02

98.93

98. S3

98.77

98.69

96.63

98.58

98.54

9S.52

98.47

98.39

9S.32

98.26

9S.20

98.13

9S. 07

9S.OO

97.94

97.88

97.86

97.73

97.63

97.57

97.54

97.47

97.39

97.29

97.22

Sept.

97.14

97.09

97.02

96.98

96.92

96.86

96.75

96.65

96.58

96.53

96.47

96.42

96.36

96.31

96.29

96.23

96.19

96.18

96.14

96.13

96.13

96.06

95.98

95.92

95.85

95.87

95.82

95.77

95.73

95.70

~

tote.- Add 1,000 feet to obtain elevation above mean sea level.

Monthly elevation and contents, water year October 1940 to September 1941

Date

Dec . 31 ............ ^. ........

Calendar year 1940. ........

Water year 1940-41. ........

Elevation 

(feet)t

1 092 21

1,038.06

_

Contents 

(acre-feet)

287,680

_

Change In contents 

during month 

(acre-feet)

-94, 140

-39,930

+43, 160

-42, 250

+55,760

tElevations are midnight 

Point and Chelan.

jeans based on records for stations at Purple
CHELAN RIVER BASIN 

Chelan River at Chelan, Wash.

183

Location.- Water-stage recorder, lat. 47°50'05", long. 120°00'40", In SEi sec. 12, T. 27 

N., R. 22 E., In forebay upstream from control dam at Chelan. Datum of gage Is at mean 

sea level, subject to correction to datum of 1929.

Drainage area.- 950 square miles.

Records available.- October 1903 to September.1941.

Average discharge.- 38 years, 2,022 second-feet (adjusted).

Extremes.- Maximum dally discharge during year, 5,610 second-feet (regulated) June 13; 

minimum dally, 66 second-feet (regulated) Apr. 13.

1903-41: Maximum dally discharge, 12,800 second-feet June 3, 1936; no flow part of 

day Jan. 30, 1917, when lake outlet was blocked with Ice, and at other times because of 

artificial regulation.

Remarks.- Records excellent. Unmeasured water that Is diverted for Irrigation above statlon Is small percentage of total runoff. Washington Water Power Co. diverts water at 

Chelan for power and Irrigation, which quantity Is Included In records of dally discharge. Flow regulated by power plant at and storage In Lake Chelan.

Cooperation.- Records collected In cooperation with Washington Water Power Co. 

Discharge, in seeond-feet, water year October 1940 to September 1941

Day

1 

2 

S

4 

6

6

7 

8 

9 

10

11 

12 

13 

14 

16

16 

17 

18 

19 

20

21 

22 

23 

24 

26

26

27 

28 

29

30 

31

Oct.

2,250 

2,240 

2,240 

2,040 

2,130

t2,030 

2,110 

2,120 

2,210 

2,080

2,120 

2,100 

tl,460 

1,960 

2,050

2,210 

2,210 

2,210 

2,240 

t2,170

2,240 

2,240 

2,210 

2,210 

2,240

2,140 

t2,150 

2,170 

2,220 

2,220 

2,200

Nov.

2,190 

2,230 

t2,160 

2,180 

2,210

2,230 

2,220 

2,220 

2,220 

t2,180

2,040 

1,870 

2,220 

2,220 

2,220

2,220 

t2,230 

2,210 

2,210 

2,210

2,210 

2,210 

2,210 

t2,210 

2,220

2,220 

2,210 

2,180 

1,620 

342

Month

Oct 

NOW

Dec

Ca.

Jam 

Fob 

Han 

Apr 

May 

Jum 

Jill" 

Augi 

Sep

Wa

Lendar year 1940

11..............

ter year 194O-41

Dec.

tsoo

1,210 

1,660 

2,120 

2,050

1,010 

624 

t268 

1,150 

1,350

1,230 

1,480 

1,880 

2,210 

f2,210

2,190 

2,180 

2,190 

2,160 

1,890

767 

t412 

1,380 

678 

132

700 

1,010 

1,070 

t508 

1,020 

1,020

Jan.

510 

1,340 

1,380 

1,100 

f528

1,510 

1,100 

. 1,060 

1,200 

1,300

1,560 

t2,000 

2,110 

,790 

,310

,260 

,130 

,200 

t576 

1,100

1,180 

1,100 

998 

1,040 

899

tl,470 

979 

1,140 

1,120

1,150 

1,170

Feb.

1,110 

t428 

961 

1,090

944

939 

1,020 

741 

f411 

1,030

1,030 

1,120 

1,180 

1,220 

695

t473 

1,130 

1,140 

1,150 

1,160

1,140 

624 

t266 

1,290 

1,310

1,050 

1,140 

1,130

Mar.

669 

t384 

1,170 

1,110 

1,080

1,030 

1,100 

627 

f345 

1,100

1,100 

1,240 

1,150 

1,220 

643

t507 

1,190 

1,220 

1,190 

1,330

1,030 

917 tsoi

1,240 

991

874 

906 

868 

668 

t454 

1,000

Observed

Discharge in 

second-feet

Maximum

2,250 

2,230 

2,210

7,200

2,110 

1,310 

1,330 

1,270 

311 

5,610 

2,840 

2,110 

2,110

5,610

Mini1,460 

342 

132

0

510 

266 

345 

66 

76 

97 

620 

1,410 

753

66

He an

2,143 

2,111 

1,299

1,653

1,204 

962 

931 

350 

118 

2,176 

1,791 

1,841 

1,552

1,374

Runoff 

in 

acre-feet

131, 70C 

125, 60C 

79.85C

1.200.00C

74.00C 

53.40C 

57,23C 

20,81C 

7.27C 

129.50C 

110, 10C 

113, 20C 

92.33C

995.00C

Apr.

988 

1,270 

1,170 

1,180 

692

t324 

1,100 

640 

354 

177

147 

89 

t66 

134 

91

105 

104 

70 

67 tioo

190 

226 

211 

121 

121

105 

t?4 

80 

103 

395

May

80 

79 

162 

t77 

125

91 

93 

81 

81 

96

t92 

95 

95 

80 

82

80 

SO 

t76 

84 

94

126 

154 

116 

175 tsi

191 

306 

311 

126 

149 

109

June

t97 

629 

464 

685 

1,420

1,470 

1,640 

t3,650 

3,280 

2,210

1,610 

3,020 

5,610 

5,520 

t4,950

3,540 

1,210 

842 

1,130 

1,230

1,340 

t2,120 

4,040 

1,480 

1,270

1,550 

2,370 

2,140 

12,200 

2,570

July

1,960 

2,050 

2,360 

2,340 

1,580

tl,960 

2,340 

2,180 

2,140 

1,700

1,580 

1,670 

tl,290 

1,260 

930

620 

1,170 

2,560 

1,680 

t2 , 030

1,760 

2,050 

2,020 

1,750 

1,780

1,740 

tl,420 

1,420 

1,760 

1,970 

1,950

Aug.

1,920 

1,900 

tl,410 

1,440 

1,960

1,990 

2,000 

1,910 

1,800 

tl,760

1,750 

1,510 

2,110 

2,090 

2,000

1,390 

tl,680 

1,860 

1,910 

1,810

1,890 

2,010 

1,830 

tl,660 

1,800

1,970 

,1,820 

1,920 

1,820 

1,990 

tl,660

Sept.

1,620 

1,730 

2,080 

1,900 

1,930

1,610 

tl,820 

1,790 

2,110 

1,920

1,810 

1,760 

1,760 

tl,420 

1,640

1,830 

1,520 

1,130 

1,020 

753

t876 

1,790 

1,710 

1,880 

1,320

1,060 

1,280 

tl,160 

1,260 

1,060

Adjusted for change 

in reservoir contents

Change in 

contents in 

Lake Chelan 

(acre-feet)

-94,140 

-39,930

+43,160

-42,250 

-28,480 

+20,160 

+183,700 

+207,100 

+44,610 

-24,600 

-65,580 

-49,890

+55,760

Runoff 

in 

acre-feet

76,760 

31,460 

39,920

1,243,000

31,750 

24,920 

77,390 

204,500 

214,400 

174,100 

85,500 

47,620 

42,440

1,051,000

Discharge in 

second-feet

He an

1,248 

529 

649

1,712

516 

449 

1,259 

3,437 

3,487 

2,926 

1,391 

774 

713

1,451

Per 

square

mile

1.31 

.557 

.682

1.80

.543 

.473 

1.33 

3.62 

3.67 

3.08 

1.46 

.81E 

.751

1.53

Run*

in 

inches

1.51 

.62 

.79

24.51

.63 

.49 

1.53 

4.04 

4.23 

3.44 

1.68 

.94 

.84

20.74

t Sunday.

Note.- Change in contents based on midnight mean gage heights from stations at Purple Point and 

helan.
184 CHELAN RIVER BASIN

Railroad Creek at Lucerne, Wash.

Location.- Water-stage recorder, lat. 48°11'40", long. 120°35'50", in sec. 9, T. 31 N., 

R. 18 E., half a mile upstream from mouth and half a mile southwest of Lucerne.

Drainage area.- 64 square miles.

Records available.- December 1910 to June 1913, January 1927 to September 1941.

Average discharge.- 15 years (1911-12, 1927-41), 188 second-feet.

Extremes.- Maximum discharge during year, 604 second-feet May 13 (gage height, 3.82 feet); 

minimum, 19 second-feet Feb. 14.

1910-13, 1927-41: Maximum discharge, 1,910 second-feet June 8, 1927 (gage height, 

5.3 feet); minimum, 1 ss than 9.4 second-feet, occurred sometime during period Jan. 

15-25, 1930, when sta -discharge relation was affected by ice.

Remarks.- Records fair .cept those for periods of ice effect or no gage-height record, 

which are poor. No Iverslon or regulation.

Cooperation.- Water-stage recorder inspected and results of eight discharge measurements 

furnished by Washington Water Power Co.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

83

70

63

56

54

50

48

4£

48

138

192

124

91

83

72

65

65

157

265

316

291

200

168

204

192

160

132

114

107

107

107

Nov.

97

97

97

8E

83

77

83

S3

75

70

67

67

65

63

63

63

65

61

56

56

56

52

58

56

54

50

50

56

61

58

-

Dec.

56

56

56

61

63

61

58

58

58

44

b35

b30

b30

b30

b30

b35

b40

b45

52

54

54

56

50

50

48

46

46

44

44

44

44

Jan.

41

b35

b35

a35

a40

a40

42

41

39

37

34

34

34

31

31

3?

33

34

33

27

31

33

33

31

31

31

30

30

31

31

31

Month

October .......................

November ......................

December ......................

Calendar year 1940 .........

January .......................

February .......... ...........

March .........................

April ....................... . May ......................... .

June ..........................

July ..........................

August ........................

September .....................

Water year 1940-41 .......

Feb.

31

31

31

2E

27

27

27

27

27

27

27

27

28

27

30

31

33

34

34

33

34

31

33

34

36

37

39

42

_

_

-

Second 

foot-days

3,870

2,027

1,482

62,188

1,052

873

2,748

9,354

11,540

10,062

7,153

4,368

3,268

57,797

Mar.

56

58

56

54

50

54

54

56

56

56

56

56

58

61

65

75

91

100

97

91

91

94

94

91

97

117

140

160

176

188

200

Maximum

316

97

63

1,130

42

42

200

489

528

520

301

200

148

528

Apr.

236

331

316

301

276

251

246

241

271

281

281

276

271

271

281

266

256

246

241

251

271

311

347

377

395

419

447

447

461

489

-

May

528

504

461

433

377

341

321

296

276

281

316

496

528

461

395

365

371

326

296

281

286

316

389

461

461

383

347

336

306

276

326

Minimum

48

50

30

26

27

27

50

236

276

241

156

97

83

27

June

359

353

353

359

347

365

389

331

301

316

407

504

520

426

383

365

331

311

281

256

241

266

336

311

266

241

246

281

316

301

-

Mean

125

67.6

47.8

170

33.9

31.2

88.6

312

372

335

231

141

109

158

July

296

291

301

301

286

281

291

266

241

224

220

220

224

232

246

266

276

286

261

236

220

204

184

172

160

156

160

168

168

160

156

Per 

square 

mile

1.95

1.06

.747

2.66

.530

.488

1.38

4.88

5.81

5.23

3.61

2.20

1.70

2.47

Aug.

152

144

140

136

128

128

128

136

144

146

152

200

184

164

156

148

144

148

148

152

152

148

144

136

121

117

128

128

117

100

97

Sept.

104

140

140

148

128

110

104

94

8S

148

140

114

100

114

114

114

128

121

114

104

88

83

83

88

91

97

100

94

91

86

-

Runoff

Inches

2.25

1.18

.86

36.12

.61

.51

1.60

5.44

6.71

5.85

4.16

2.54

1.90

33.61

Acre-feet

7,630

4,020

2,940

123,400

2,090

1,730

5,450

18,550

22 , 890

19,960

14,190

8,660

6,480

114,600

a No gage-height record; discharge computed on basis of one discharge measurement, observer's 

notes, and weather records.

b Stage-discharge relation affected by ice.
WENA.TCHEE RIVER BASIN 185

Wenatchee Lake near Plain, Wash.

Location.- Water-stage recorder, lat. 47°49'50", long. 120°46'30", in sec. 19, T. 27 II., 

R. 17 E., on north shore of Wenatchee Lake, 2f miles upstream from outlet, 7& miles 

northwest of Plain, and 33 miles upstream from Leavenworth. Datum of gage is 1,860.00 

feet above mean sea level, subject to correction to datum of 1929; gage readings have 

been reduced to elevations above mean sea level.

Drainage area.- 277 square miles.

Records available.- January 1952 to September 1941.

Extremes.- Maximum elevation during year, 1,872.52 feet Hay 1; iiinimuik, 1,869.54 feet 

probably Oct. 9, from recorded range of stage, recorder was not operating properly.

1932-41: Maximum elevation recorded, 1,876.57 feet June 16, 1933; minimum elevation, 1,869.27 feet Dec. 1, 1936.

Remarks.- Fish weir at lake outlet has some effect on late summer gage heights.

Elevation, in feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

.

69.73

69.74

-

-

_

-

-

-

-

_

-

-

-

-

69.93

-

-

-

-

_

-

-

-

-

_

-

-

-

-

70.32

NOV.

70.32

70.32

70.27

70. S3

70.17

70.14

70.15

70.19

70.19

70.11

70.08

70.05

70.03

70.01

69.99

69.96

69.95

69.94

69.89

69.87

69.86

69.83

69.81

69.80

69.80

69.78

69.80

69.94

70.06

70.18

-

Dec.

70.19

70.20

70.23

70.41

70.46

70.49

70.46

70.49

70.59

70.58

70.48

70.36

70.28

70. SI

70.18

70.15

70.11

70.12

70.14

70.18

70.16

70.18

70.20

70.19

70.15

70. IS

70.09

70.06

70.04

70.02

69.99

Jan.

69.96

69.92

69.86

69.88

69.89

69.89

69.88

69.86

69.85

69.84

69.83

69.81

69.80

69.81

69.81

69.81

69.86

69.90

69.89

69.88

69.85

69.82

69.80

69.79

69.80

69.80

69.78

69.76

69.74

69.74

69.76

Feb.

69.79

69.78

69.77

69.76

69.75

69.75

69.74

69.74

69.74

69.74

69.75

69.75

69.74

69.74

69.73

69.72

69.71

69.71

69.71

69.78

69.73

69.74

69.77

69.79

69.80

69.81

69.81

69.85

_

_

-

Mar.

69.93

70.03

70.11

70.13

70.15

70.15

70.16

70.19

70.25

70.30

70.33

70.36

70.37

70.38

70.38

70.44

70.55

70.67

70.75

70.76

70.74

70.73

70.72

70.69

70.70

70.77

70.94

71.19

71.39

71.60

71.79

Apr.

71.93

72.27

72.37

72.17

71.93

71.74

71.60

71.51

71.54

71.60

71.59

71.52

71.47

71.45

71.50

71.48

71.36

71.28

71.22

71.22

71.32

71.48

71.68

71.85

71.97

72.08

72.16

72.21

72.26

72.41

-

May

72.50

72.40

72.21

71.94

71.73

71.53

71.37

71.22

71.09

71.02

71.15

71.75

72.23

72.11

71.86

71.71

71.86

71.82

71.57

71.37

71.30

71.36

71.52

71.80

72.04

71.96

71.75

71.56

71.44

71.31

71.44

June

71.64

71.58

71.50

71.44

71.44

71.51

71.63

71.49

71.27

71.20

71.33

71.60

71.73

71.66

71.46

71.26

71.12

71.04

70.98

70.88

70.80

70.76

70.87

70.88

70.78

70.71

70.69

70.71

70.81

70.89

-

July

70.88

70.84

-

-

-

_

_

70.60

70.55

70.47

70.41

70.38

70.38

70.39

70.40

70.44

70.47

70.52

70.50

70.44

70.35

70.28

70.19

70.13

70.09

70.07

70.06

70.07

70.04

70.04

70.02

Aug.

69.99

69.97

69.95

69.97

69.96

69.95

69.96

69.96

69.98

70.00

70.01

70.07

70.12

7O.09

70.06

70.05

70.02

70.01

70.01

70.00

70.04

70.03

70.01

69.99

69.95

69.94

69.95

69.93

69.91

69.87

69.83

Sept.

69.89

69.95

70.00

70.07

70.09

70.03

69.97

69.92

69.88

70.06

70.24

70.20

70.14

70.28

70.48

70.54

70.78

70.72

70.60

70.52

70.41

70.31

70.26

7T3.22

70.18

70.13

70.14

70.12

70.09

70.07

-

Note.- Add 1,800 feet to obtain elevation above mean sea level
186 WENA.TCHEE RIVER BASIN

Wenatchee River below Wenatchee Lake, Wash.

Location.- Water-stage recorder, lat. 47°49'50", long. 120°46'30", in sec. 19, -T. 27 N., 

R. 17 E., on north shore of Wenatchee Lake, 2f miles upstream from outlet, 7i miles 

northwest of Plain, and 33 miles upstream from Leavenworth. Datum of gage is 1,860.00 

feet above mean sea level, subject to correction to datum of 1929; gage readings have 

been reduced to elevations above mean sea level. Discharge measurements made at highway bridge half a mile downstream from lake outlet.

Drainage area.- 277 square miles.

Records available.- January 1932 to September 1941.

Extremes.- Maximum discharge during year, 2,750 second-feet May 1 (elevation, 1,872.52 

feet); minimum, 183 second-feet probably Oct. 9, when recorder was not operating properly (elevation, 1,869.54 feet, from recorded range of stage).

1932-41: Maximum discharge recorded, 8,310 second-feet June 16, 1933 (elevation, 

1,876.57 feet); minimum discharge, 134 second-feet Dec. 1, 1936 (elevation, 1,869.27 

feet).

Remarks.- Records good except those for periods of no gage-height record, which are poor. 

No diversion above station. Flow subject to effect of fish weir at outlet to Wenatchee 

Lake.

Rating table, water year 1940-41, except periods of ice effect (elevation, in feet, and discharge,

In second-feet) 

(Shifting-control method used June 24 to Sept. 30)

1,869.8 281 1,870.2 49S 1,870.6 796 1,871.0 1,150 1, 

1,870.0 380 1,870.4 637 1,870.8 969 1,871.3 1,450\ 1,

Discharge, in second-feet, water year October 1940 to September

Day

1 

Z 

3 

4 

5

6 

7 

8 

9

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29

30 

31

Oct.

270 

252 

235 

225 

220

215 

205 

195 

190 

330

615 

540 

460 

420 

3 SO

344 

330 

510 

710 

930

1,120 

960 

820 

920 

940

750 

640 

580 

550 

550 

579

Nov.

579 

579 

545 

518 

479

461 

467 

492 

492 

442

425 

408 

397 

386 

375

359 

354 

349 

323 

314

309 

295 

286 

281 

281

273 

«281 

349 

414 

486

Dec.

492 

498 

552 

645 

683

706 

683 

706 

788 

780

699 

608 

552 

505 

b475

b455 

442 

b440 

b450 

b460

473 

486 

498 

492 

467

448 

430 

414 

402 

391 

375

Jan.

359 

338 

309 

319 

323

*323 

319 

309 

304 

300

295 

286 

281 

286 

286

286 

309 

328 

323 

319

304 

290 

281 

277 

281

281 

273 

264 

256 

256 

264

Feb.

277 

273 

268 

264 

260

260 

256 

256 

256 

256

260 

260 

256 

256 

252

247 

243 

243 

243 

247

252 

256 

268 

277 

281

286 

286 

304

Mnnth SecondMonth foot-days

Octo 

Nove 

Dece

Ca

Janu 

Febr 

Marc 

Apri 

May 

June 

July 

Augu 

Sept

Wa

mbe r ......................

lendar year 194C 

ary

...... 3

ember .....................

15,985 

11,999 

16,495

69,717

9,229 

7,343 

24,926 

57,210 

57,030 

40,128 

18,243 

9,999 

13,699

ter year 1940-41 .......... 282,286

Mar.

344 

397 

442 

455 

467

467 

473 

492 

532 

565

587 

608 

615 

623 

623

668 

755 

856 

925 

934

916 

907 

899 

872 

881

943 

,100 

,340 

,540 

,750 

,950

Maximum

1,120 

579 

788

5,600

359 

304 

1,950 

2,630 

2,730 

1,880 

969 

391 

864

2,730

Apr.

2,100 

2,480 

2,590 

2,370 

2,100

,890 

,750 

,660 

,690 

,750

,740 

,670 

,620 

,600 

,650

,630 

,510 

,430 

,370 

,370

,470 

,630 

,830 

,020 

,150

,270 

,360 

,410 

,470 

,630

May

2,730 

2,620 

2,410 

2,110 

1,8SO

1,680 

1,520 

1,370 

1,240 

1,170.

1,300 

1,900 

2,430 

2,300 

2,030

1,860 

2,030 

1,980 

1,720 

1,520

1,450 

1,510 

1,670 

1,960 

2,220

2,140 

1,900 

1,740 

1,590 

1,460 

1,590

Minimum

190 

273 

375

190

256 

243 

344 

1,370 

1,170 

838 

338 

252 

273

190

June

1,790 

1,730 

1,650 

1,590 

1,590

1,660 

1,780 

1,640 

1,420 

1,350

1,480 

1,750 

1,880 

1,810 

1,610

1,410 

1,270 

1,190 

1,130 

1,040

969 

934 

1,030 

1,030 

934

864 

838 

847 

925 

987

Mean

516 

400 

532

1,010

298 

262 

804 

1,907 

1,840 

1,338 

588 

323 

457

773

871.7 1,850 

872.0 2,180

1941

July

969 

925 

900 

860 

820

780 

750 

714 

676 

615

572 

552 

552 

558 

565

594 

615 

652 

637 

594

532 

486 

430 

397 

375

364 

359 

364 

349 

349 

338

Per 

square 

mile

1.86 

1.44 

1.92

3.65

1.08 

.946 

2.90 

6.88 

6.64 

4.83 

2.12 

1.17 

1.65

2.79

Aug.

323 

314 

304 

314 

309

304 

309 

309 

319 

328

333 

364 

391 

375 

359

354 

338 

333 

333 

328

349 

344 

333 

323 

304

300 

304 

295 

286 

268 

252

Sept.

277 

304 

328 

364 

375

344 

314 

290 

273 

359

461 

436 

402 

486 

623

66S 

864 

813 

714 

652

572 

505 

473 

448 

425

397 

402 

391 

375 

364

Runoff

Inches

2.15 

1.61 

2.21

49.64

1.24 

.99 

3.35 

7.68 

7.66 

5.39 

2.45 

1.34 

1.84

37.91

Acre-feet

31,710 

23,800 

32,720

733,300

18,310 

14,560 

49,440 

113,500 

113,100 

79,590 

36,180 

19,830 

27,170

559,900

* Winter-discharge measurement made on this day. 

b Stage-discharge relation affected by ice.

Note.- Ho gage-height record Oct. 1, 3-15, 17-30, and July 3-7; discharge computed on basis of 

ecords for station at Plain.
WENATCHEE RIVER BASIN 187

Wenatchee River at Plain, Wash.

Location.- Water-stage recorder, lat. 47°45'50", long. 120°39'30", In lot 8, sec. 12, T. 

26 N., R. 17 E., at Plain, a quarter of a mile downstream from Beaver Creek, 7j- miles 

downstream from Nason Creek, and 12 miles north of Leavenworth. Datum of gage is 

1,805 feet above mean sea level (from river-profile map).

Drainage area.- 591 square miles.

Records available.- November 1910 to September 1941 in reports of Geological Survey, 

August 1904 to September 1933 (monthly discharge) in State Water-supply Bulletin 5.

Average discharge.- 37 years (1904-41), 2,172 second-feet.

Extremes.- Maximum discharge during year, 4,850 second-feet my 1 (gage height, 5.73 

feet); minimum, 293 second-feet Oct. 9 (gEtge height, 1.58 feet).

1910-29, 1931-41: Maximum discharge observed, 20,800 second-feet Dec. 13, 1921 

(gage height, 11.8 feat, site and datum then in use); minimum discharge, 191 secondfeet Dec. 1, 1936 (gage height, 1.34 feet).

Re-narks.- Records excellent. Wenatchee Park Land & Irrigation Co. diverte a maximum of 

about 12 second-feet from Chiwawa River during irrigation seasons. Natural regulation 

In Wenatchee Lake and late summer flow may be slightly influenced by fish weir at lake 

outlet.

Rating table, water year 1940-41 except periods of ice effect {gage height, in feet, 

and discharge, in second-feet)

1.7 

1.9 

2.1

340

435

545

2.4 

2.7 

3.0

740

960

1,200

3.3 

3.6 

4.0

1,470

1,780

2,260

4.S 

5.0 

5.5

2,920

3,650

4,460

Discharge. In second-feet, water year October 1940 to September 1941

Day

1

2

3

4

6

6

7

8

9

10

11

12

13

14

16

16

17

18

19

20

21

22

23

24

26

26

27

28

29

30

31

Oct.

420

405

3S5

358

336

324

308

304

300

362

1,010

852

726

670

593

540

496

788

1,170

1,540

1,650

1,530

1,260

1,410

1,420

1,230

1,060

928

866

866

920

- Nov.

S96

888

345

782

733

698

719

747

706

650

618

587

551

528

523

518

523

512

490

496

490

468

452

479

474

468

479

605

740

838

Dec.

782

824

896

1,030

1,050

1,080

1,020

1,080

1,190

1,100

976

866

761

733

D700

b665

670

D700

b735

b760

775

810

817

796

768

733

712

691

670

650

618

Jan.

b570

523

496

b510

b525

534

540

540

540

518

501

496

490

490

490

484

518

534

551

523

501

484

474

463

474

474

457

446

440

436

452

Uonth

October .......................

November .......................

December ......................

Calendar year 1940 .........

January .......................

February ......................

March .........................

April .........................

Hay

June ..........................

July ..........................

August ........................

September .....................

Water year 1940-41 ..........

Feb.

474

462

446

435

430

435

430

425

425

435

446

440

435

430

415

415

415

415

420

425

435

440

462

474

474

484

496

523

_

..

-

Secondfoot-days

25,027

16,502

25,658

601,452

15,478

12 441

40,717

97,210

98,400

67,070

27 453

14^139

20,135

462,235

Mar.

612

740

782

782

796

796

810

859

912

944

960

992

1,000

992

1,000

1,080

1,230

1,370

1,460

1,450

1,410

1,420

1,410

1,390

1,410

1,540

1,820

2,230

2,530

2,850

3,140

Maximum

1,650

896

1,190

8,600

570

523

3,140

4,65C

4,780

3,840

1,490

557

1,220

4.78C

Apr.

3,380

4,100

4,110

3,750

3,400

3,100

2,880

2,740

2,S60

3,000

2,910

2,840

2,750

2,750

2,890

2,750

2,560

2,430

2,360

2,400

2,610

2,S90

3,260

3,560

3,760

3,950

4,080

4,180

4,310

4,650

-

May

4,780

4,600

4,180

3,650

3,260

2,920

2,620

2,350

2,120

2,030

2,250

3,340

4, ISO

3,870

3,410

3,190

3,560

3,360

2,920

2,640

2,520

2,610

2,890

3,460

3,660

3,650

3,220

2,960

2,720

2,470

2,810

Minimum

300

452

618

300

435

415

612

2,360

2,030

1,350

512

358

395

300

June

3,030

2,880

2,740

2,660

2,660

2,810

3,020

2,720

2,400

2,250

2,510

2,990

3,240

3,020

2,650

2,310

2,110

2,000

1,890

1,740

1,590

1,550

1,740

1,710

1,560

1,420

1,350

1,410

1,530

al,590

-

Mean

807

617

828

1,643

499

444

1,313

3,240

3,174

2,236

866

456

671

1,266

July

al,490

1,.

i»:

1,!

560

530

510

1,230

1,180

1,1

1,1

1,'

L60

L10

)30

960

912

i

.

373

359

352

845

859

S366

312

904

838

775

719

557

305

593

563

551

557

534

512

512

Per 

square 

mile

1.37

1.04

1.40

2.78

.344

.751

2.22

5.4S

5.37

3.78

1.50

.772

1.14

2.14

Aug.

490

457

452

484

468

452

446

446

452

467

468

528

557

518

496

501

474

4.62

452

452

462

462

440

435

Sept.

396

452

496

534

528

490

449

420

400

576

726

638

605

740

960

920

1,220

1,100

992

912

S24

740

691

664

415 ' 638

410 624

425

430

410

380

368

631

605

593

575

-

Runoff

Inches

1.57

1.16

1.61

37.85

.97

.78

2.56

6.12

6.19

4.22

1.73

.89

1.27

29.07

Acre-feet

49,640

36,700

50,890

1,193,000

30,700

24,680

SO, 760

192,800

195,200

153,000

54,460

2S,040

39,940

916,300

a No gage-height record} discharge computed on basis of records for station below Wenatchee Lake, 

b Stage-discharge relation affected by ice.

461678 O-42-13
WEIIATCHEE RIVER BASIN

Wenatchee River at Peshastin, Wash.

Location.- Water-state recorder, lat. 47°34'50", long. 120°37'00", in SEiSWi sec. 8, T. 24 

N., R. 18 E., 1 mile northwest of Peshastin and 35 miles upstream from Peshastin Creek. 

Datum of gage is 1,028.04 feet (revised) above mean sea level, datum of 1929.

Drainage area.- 1,000 square miles.

Records available.- October 1928 to September 1941 in reports of Geological Survey. Octoher 1928 to February 1929 (monthly discharge) in Washington State Water-Supply Bulletin 

5.

Average discharge.- 13 years, 2,739 second-feet.

Extremes.- Maximum discharge during year, 6,730 second-feet May 1 (gage height, 6.79 feet); 

minimum, 320 second-feet Nov. 19.

1929-41: Maximum discharge, 20,400 second-feet June 16, 1933 (gage height, 11.82 

feet); minimum, 183 second-feet Oct. 14, 1939 (gage height, 1.26 feet).

Remarks .- Records excellent except those for periods of shifting control, which are good, 

and those for periods of ice effect, which are fair. Several diversions above station 

for irrigation. Slight artificial regulation at mill pond at Leavenworth and at power 

plant in Tumwater Canyon, and from operation of fish weir at Wenatchee Lake Outlet.

Rating table, water year 1940-41, except periods of Ice effect or shifting control (gage height, In 

feet, and discharge, In second-feet)

1.7 355 2.7 960 3.7

2.0 515 3.0 1,210 4.0

2.3 690 3.3 1,500 4.5

1,940 5.0 3,580

2,300 5.7 4,610

2,920 6.5 6,080

Discharge, in second-feet, water year October 1940 to September 1941

Dayj Oct.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

582

564

554

537

488

Nov.

1,150

1,120 .

Dec.

1,060

1.100

1,060 1 1,200

968 1,350

904 1,400

460; ' 869 1,450

432 ! 918 | 1,350

422 932 1,350

416' 897! 1,610

432 1 841

1,160

1,200

992

918

820

736

678

736

1,300

1,720

1,940

1,940

1,660

1,830

2,060

1,720

1,450

1,260

1,140

1,110

1,150

788

729

666

660

666

648

666

648

606

612

600

564

542

570

564

559

559

*762

1,070

1,450

1,260

1,100

992

b915

904

b900

b900

b910

b920

b940

976

1,020

1,030

1,000

953

918

904

876

Jan.

b725

*654

618

b615

b630

b655

678

684

684

666

654

636

630

630

630

624

654

703

729

690

660

642

630

612

612

624

606

600

855 1 582

1,200' 834

-

576

794 j 600 )

Feb.

630

618

618

606

600

600

594

594

594

606

624

*618

618

606

582

576

582

588

594

600

618

624

642

648

654

660

672

742

_

_

-

Month

October. ........ .............. ...........

November . ...................... ...........

December .... .............................

Calendar year 1940 ......................

January ........ ..........................

February ..... . .......... ... ...........

March. ...... . . ........... ... ......

April ....... . .... ... ..................

May......... ...... ........... ..........

June ........ ........ . . ...... .........

July. ................... ..... ...........

August .................. . . ...............

September. ... .... ......... .............

Water year 1940-41 . . ... ...............

Mar.

992

1,130

1,180

1,160

1,170

1,160

1,180

1,260

1,350

1,350

1,400

*1,450

1,450

1,450

1,450

1,560

1,780

2,000

2,120

2,120

2,060

2,000

2,000

1,940

2,000

2,180

2,540

2,980

3,440

3,360

4,150

Apr.

4

5

5

4

4

4

3

3

3

4

3

3

3

3

3

3

3

3

3

3

3

3

4

4

,450

,290

,480

,940

,610

,150

,860

,720

,860

,000

,860

,860

,720

,580

,860

,720

,440

,240

,180

,240

,440

,860

,300

,610

4,940

5,290

E

5

5

6

Secondfoot-days

32 , 407

23,338

33,221

815,453

19,933

17,308

57 , 862

130,030

136,840

95,720

36,073

18,199

28,593

629,524

,480

,670

,870

,510

-

May

6,730

6,290

5,670

4,940

4,450

4,000

3,580

3,240

2,980

2,920

3,180

4,640

5,870

5,290

4,610

4,300

4,940

4,610

4,000

3,720

3,580

3,720

4,150

4,940

5,480

5,110

4,450

4,000

3,860

3,440

4,150

Maximum

2,060

1,200

1,610

12,400

729

742

4,150

6,510

6,730

4,610

2,060

710

1,780

6,730

June

4,450

4,150

4,000

3,860

3,860

4,000

4,300

3,860

3,440

3,240

3,580

4,150

4,610

4,150

3,720

3,310

3,050

2,920

2,790

2,540

2,360

2,240

2,420

2,420

2,240

2,000

1,940

1,940

2,060

2,120

-

Minimum

4ie

54£

794

4ie

57 (

57 (

992

3.18C

2,92C

1,94C

63f

50^

49E

41(

July

2,060

1,940

1,940

1,880

1,780

1,660

1,610

1,560

1,400

1,260

1,170

1,120

1,080

1,060

1,030

1,060

1,060

1,090

1,130

1,050

953

890

827

762

729

684

648

690

678

636

636

Aug.

Mean

1,045

778

1,072

2,228

643

618

1,867

4,334

4,414

3,191

1,164

587

3 953

1,725

612

588

582

600

594

576

570

570

576

576

582

654

710

678

636

642

618

594

570

570

576

576

559

548

542

548

564

576

576

532

504

Sept.

498

570

630

690

722

660

612

582

554

814

1,080

960

862

1,030

1,450

1,400

1,780

1,660

1,450

1,350

1,210

1,070

984

946

897

855

855

834

800

788

-

Runoff in 

acre- feet

64,280

46,290

65,890

1,617,000

39,540

34,330

114,800

257,900

271,400

189,900

71,550

36,100

56,710

1,249,000

* Winter discharge measurement made on this day.

b Stage-discharge relation affected by ice.

Note.- Shifting-control method used Oct. 13 to Feb.
WENATCHEE RIVER BASIN 

Chiwawa River near Plain, Wash.

189

Location.- Water-stage recorder, lat. 47°50'30", long. 120°39'40", in SEJ- sec. 13, T. 27 

N., R. 17 E., half a mile upstream from Goose Creek, 6 miles north of Plain, 7 miles 

upstream from mouth, and 11 miles northeast of Chiwaukum. Datum of gage is 2,100 feet 

above mean sea level (from river-profile map).

Drainage area.- 169 square miles.

Records available.- August 1936 to September 1941. Hay 1911 to October 1914, at site 4 

miles downstream, published as Chiwawa Creek near Leavenworth.

Extremes.- Maximum discharge during year, 1,360 second-feet May 2 (gage height, 6.04 

reet); minimum dally, 70 second-feet Feb. 16.

1911-14, 1936-41: Maximum discharge recorded, 3,210 second-feet May 25, 26, 1938 

(gage height, 7.66 feet); minimum recorded, 67 second-feet Nov. 28, 1936 (gage height, 

3.74 feet), but may have been less during periods of ice effect.

Remarks.- Records good except those for periods of ice effect, which are poor. No 

diversion or regulation.

Rating table, water year 1940-41 except periods of Ice effect (gage height. In feet, 

and discharge. In second-feet)

3.7 58 4.5 320 5.6 990 

3.9 100 4.7 420 6.0 1,320 

4.1 156 5.0 590 

4.3 229 5.3 780

Discharge, in second- feet, water year October 1940 to September 1941

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

95 

93 

88 

84 

79

77 

75 

73 

73 

120

260 

150 

129 

123

110

103 

100 

253 

290 

385

385 

277 

225 

353 

306

242 

210 

194 

187 

198 

*221

Nov.

194 

190 

180 

163 

156

147 

163 

166 

156

141

125 

105 

90 

80 

85

95

105 

100 

105 

113

110 

100 

100 

105 

105

*103 

110 

120 

125 

123

Dec.

116 

116 

123 

132 

132

132 

129 

138 

144

138

110 

85 

75 

80 

80

75 

80 

90 

105 

120

120 

130 

130 

125 

120

120 

115 

115 

110 

110 

105

Jan.

105 

100 

95 

*95 

100

100 

100 

100 

100 

90

85 

85 

85 

85 

85

85 

90 

95 

90 

90

86 

86 

86 

86 

91

88 

86 

86 

84 

84 

86

Feb.

S8 

8S 

88 

88 

86

86 

86 

86 

S6 

86

86 

86 

85 

«85 

75

70 

75 

75 

75 

80

80 

80 

84 

84 

86

86 

88 

103

«r.r,+v, SecondMonth foot-days

Octo 

Hove 

Decs

Ca

Janu 

Febi 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Ha

ber .......................

mber ......................

lendar year 194C 

ary

) ......--- ]

1 .........................

ember .....................

5,558 

3,760 

3,500

45,684

2,809 

2,351 

7,430 

23,723 

27,066 

19,785 

7,940 

3,294 

4,372

ter year 1940-41 ... ...... 111,588

Mar.

126 

156 

153 

150 

150

147 

147 

156 

163 

163

*163 

166 

166 

163 

166

187 

221 

242 

250 

238

229 

238 

246 

242 

255

306 

375 

436 

492 

536 

602

Maximum

385 

194 

144

2,470

105 

103 

602 

1,270 

1,320 

990 

442 

132 

242

1,320

Apr.

666 

885 

843 

760 

708

644 

608 

584 

656 

689

682 

696 

682 

696 

734

682 

638 

614 

608 

638

708 

780 

871 

934 

990

1,050 

1,080 

1,150 

1,180 

1,270

.May

1,320 

1,260 

1,130 

998 

892

787 

722 

663 

620 

620

702 

1,010 

1,170 

1,010 

927

885 

969 

857 

741 

682

670 

702 

794 

969 

1,060

969 

864 

822 

754 

696 

801

Minimum

73 

80 

75

73

84 

70 

126 

584 

620 

420 

132 

86 

93

70

June

808 

780 

767 

767 

774

808 

843 

722 

663 

663

794 

934 

990 

878 

767

682 

650 

608 

554 

508

475 

475 

566 

530 

464

431 

420 

470 

514 

480

July

442 

415 

420 

410 

385

365 

370 

340 

310 

286

268 

263 

250 

246 

246

242 

238 

246 

225 

210

194 

187 

173 

166 

173

159 

153 

147 

141 

138 

132

Per 

Mean square 

mile

179 1.06 

125 .740 

113 .669

398 2.36

90.6 .536 

84.0 .497 

240 1.42 

791 4.68 

873 5.17 

660 3.91 

256 1.51 

106 .627 

146 .864

306 1.81

Aug.

126 

123 

123 

132 

121

118 

110 

108 

108 

105

105 

129 

121 

108 

105

105 

103 

103 

105 

103

100 

98 

93 

93 

86

88 

100 

103 

98 

88 

86

Sept.

103 

116 

132 

132 

116

103 

100 

95 

93 

184

173 

138 

132 

166 

194

183 

242 

194 

173 

163

153 

144 

144 

147 

147

147 

153 

138 

135 

132

Runoff

Inches

1.22 

.83

.77

32.05

.62 

.52 

1.64 

5.22 

5.96 

4.35 

1.75 

.72 

.96

24.56

Acre-feet

11,020 

7,460 

6,940

289,000

5,570 

4,660 

14,740 

47,050 

53,680 

39,240 

15,750 

6,530 

8,670

221,300

* Winter-discharge measurement made on this day. 

Note.- Stage-discharge relation affected by Ice Nov. 

Feb. 13-22.

11-19, 22-24, 27-29, Dec. 11 to Jan. 20,
190 WENATCHEE RIVER BASIN

Icicle Creek above Snow Creek, near Leavenworth, Wash.

Location.- Water-stage recorder, lat. 47°32'25", long. 120°42'55", In SEi sec. 28, T. 24 

N., R. 17 E., three-eighths of a mile upstream from Snow Creek and 4i miles southwest 

of Leavenworth.

Drainage area.- 193 square miles.

Records available.- September 1936 to September 1941.

Extremes.- Maximum discharge during year, 1,640 second-feet May 31 (gage height, 7.15 

feet); minimum recorded, 93 second-feet Oct. 9 (gage height, 2.23 feet), but may have 

been lower sometime during period of ice effect.

1936-41: Maximum discharge, 4,320 second-feet June 3, 1937 (gage height, 10.10 

feet), from rating curve extended above 3,000 second-feet; minimum may have been less 

than 55 second-feet sometime during period Nov. 29 to Dec. 2, 1936, or Jan. 2 to Mar. 

10, 1937, when stage-discharge relation was affected by Ice.

Remarks,- Records good except those for periods of ice effect, which are poor, 

sion. Some regulation In headwater lakes for irrigation.

No diverRating tables, water year 1940-41, except periods of Ice effect (gage height, in feet, and discharge,

in aeoond-feet

Oct. 1-24 Oct. 25 to Sept. 30 

2.3 96 3.5 231 2.3 96 3.5 237 6.0 

2.5 107 4.0 333 2.5 109 4.0 342 7.0 

2.7 122 4.5 453 2.7 126 4.5 470 

3.0 153 3.0 159 5.0 622

Discharge, in second-feet, water year October 1940 to September

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

99 

100 

104 

102 

102

100 

96 

95 

94 

139

316 

190 

166 

154 

136

125 

122 

137 

145 

174

229 

227 

201 

427 

417

306 

246 

221 

205 

210 

216

Nov.

*199 

196 

180 

166 

160

154 

171 

172 

160 

133

120 

110 

95 

95 

100

105 

110 

100 

100 

105

100 

95 

95 

105 

 105

110 

120 

180 

230 

260

Dec.

305 

255 

275 

285 

265

260 

220 

275 

275 

225

170 

165 

155 

150 

150

145 

150 

155 

160 

165

170 

185 

185 

175 

170

170 

175 

175 

169 

164 

157

Jan.

128 

124 

115 

110 

110

120 

125 

 130 

130 

125

125 

127 

128 

127 

126

124 

125 

154 

154 

131

136 

131 

126 

124 

126

125 

122 

122 

120 

118 

125

Feb.

135

132 

137 

124 

132

123 

123 

122 

122

122

122 

122 

119 

 111 

107

105 

110 

110 

115 

115

120 

122 

126 

127 

127

126 

129 

172

Month footways

Octo 

Hove 

Dsoe

Ca

Janu 

Febr 

Marc 

Apri 

Hay 

June 

July 

Augu 

Sept

Ha

ber .......................

lendar year 1940 

ary

.................... . ...

st ........................

ember .....................

5,603 

4,131 

6,000

50,751

3,913 

3,437 

11,927 

26,600 

50,494 

33,382 

8,346 

3,894 

7,158

ter year 1940-41 .......... 134,885

Mar.

256 

276 

246 

333 

228

226 

233 

256 

266 

366

276 

»276 

276 

266 

276

319 

366 

417 

417 

391

378 

378 

366 

366

391

456 

557 

656 

780 

696 

937

Maximum

427 

260 

385

3,770

154 

172 

937 

1,460 

1,410 

1,170 

470 

159 

527

1,460

Apr.

1,000 

1,190 

1,020 

896 

837

780 

762 

744 

818 

818

780 

744 

708 

726 

762

708 

656 

622 

622 

656

726 

818 

937 

980 

1,050

1,120 

1,170 

1,190 

1,300 

1,460

May

1,410 

1,270 

1,140 

937 

856

760 

708 

656 

606 

639

799 

1,320 

1,270 

1,020 

876

916 

1,240 

1,000 

837 

618

837 

937 

1,090 

1,380 

1,380

1,120 

916 

856 

818 

762 

1,300

June

1, 

1,

1, 

1,

1, 

1,

Minimum Mean

94 181 

95 138 

145 194

90 439

110 136 

105 133 

336 385 

622 837 

606 964 

456 779 

138 269 

108 126 

119 239

94 370

170 

020 

980 

958 

980

000 

050 

856 

780 

818

980 

140 

140 

937 

799

744 

726 

744 

691 

639

573 

573 

606 

573 

527

484 

456 

456 

498 

484

1,000 

1,520

1941

July

470 

456 

470 

443 

404

391 

378 

354 

319 

297

276 

266 

256 

256 

256

346 

246 

246 

246 

223

 207 

197 

183 

178 

172

164 

158 

155 

151 

144 

138

Per 

square 

mile

0.938 

.715 

1.01

2.27

.653 

.637 

1.99 

4.60 

5.10 

4.04 

1.39 

.653 

1.24

1.92

Aug.

134 

130 

142 

157 

143

134 

130 

128 

127 

123

125 

159 

137 

127 

128

126

119 

118 

117 

117

116 

113 

110 

108 

108

119 

120 

128 

122 

115 

114

Sept.

119 

147 

145 

15S 

144

131 

126 

121 

121 

309

366 

216 

219 

366 

456

417 

527 

404 

354 

319

286 

256 

232 

212 

200

191 

186 

192 

171 

167

Runoff

Inches

1.08 

.80 

1.16

31.00

.75 

.66 

3.30 

5.13 

5.88 

4.51 

1.61 

.75 

1.38

26.01

Aore-feat

11,110 

8,190 

11,900

318,900

7,760 

6,820 

23,660 

52,760 

60,480 

46,380 

16,550 

7,720 

14,200

267,500

 Winter-discharge measurement made on this day. 

Note.- Stage-discharge relation affected by ice Nov. 11 to Dec. 27, Jan. 3-11, Feb. 16-21.
YAKIMA RIVER BASIN 191

Yakima River near Martin, Wash.

Location.- Water-stage recorder, lat. 47°19'10", long. 121°20'10", Just downstream from

 flan at outlet of Keechelus Lake, 34 miles northwest of Martin, Kittltas County, and

12 miles upstream from Easton. 

Drainage area.- 55 square miles. 

Records available.- October 1903 to September 1941. 

Average discharger- 37 years (1904-41), 323 second-feet (adjusted for storage since

January 1906}, Extremes (regulated).- Maximum discharge during year, 1,720 second-feet July 11 (com-

 putea rrom combined flow past gage and over lake spillway); no flow Oct. 30.

1903-41: Maximum discharge, 7,370 second-feet Mar. 26, 1915, when temporary crib 

dam was washed out; practically no flow when gates in Keechelus Lake Dan are closed. 

Remarks,- Records good October to April, excellent May to September; except those for

 extremely low flow, which are poor. Flow regulated by Keechelus Lake (see p. 196).

Records of dally discharge not adjusted for change In contents of Keechelus Lake. 

Cooperation.- Records collected and prepared In cooperation with the Bureau of Reclamation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet) 

Oct. 1 to Nov. 15 Nov. 16 to Sept. 30

2.2 4.2

2.4 12

2.7 26

3.0 47

3.5 95

4.0 155

4.5 230

5,0 316

5.5 419

2.3 

2.5 

2.7 

3.0 

3.5

10

22

35

59

113

4.0 

4,5 

5.0 

5.5 

6.0

173

251

340

442

553

7.0 326

S.O 1.1SO

9.0 1,580

Discharge, In second-feet, water year October 1940 to September 1941

D«y

1 

SS 

9 

4 

B

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

2B

26 

27 

28 

29 

SO 

31

Oct.

356 

356 

356 

356 

356

316 

297 

297 

297 

297

297 

297 

297 

297 

135

26 

26 

26 

25 

17

12 

19 

33 

IS 

1

1

1 

1 

1 

1

1

Nov.

1 

1 

1 

2 

2

2

1 

1

1 

1

1 

1 

1 

1 

1

23 

28 

28 

28 

28

23 

2S 

18 

10 

9

9 

9 

13 

16 

16

Month

Oet 

NOT*

Dec

Ca

Jam 

Pebi 

Han 

Apr 

Hay 

Jun 

Julj 

Augx 

Sep

Wa

.sndar year 1940

ter year 1940-41

Dec.

13 

12 

10 

10 

10

12 

10 

10 

10 

10

10 

10 

10 

10

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10 

10

Jan.

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10 

10

Feb.

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10

Mar.

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

11 

12 

13

14 

14 

14 

14 

14 

14

Observed

Discharge In 

second-feet

Haxldim

356 

2S 

13

952

10 

10 

14 

267 

530 

442 

1.3SO 

475 

464

1,380

Minimum

1 

1 

10

1

10 

10 

10 

14 

284 

421 

442 

432 

206

1

Moan

156 

10.3 

10.9

288

10.0 

10.0 

11.0 

45.8 

401 

431 

720 

458 

237

210

Runoff 

in 

acre-feet

9,560 

613 

629

209,100

615 

555 

674 

2,730 

24,680 

25,660 

44,250 

28,150 

14,100

152,200

Apr.

14 

15 

15 

15

15

15 

15 

15 

15 

15

15 

15 

15 

15 

15

15 

15 

15 

15 

15

15 

15 

15 

15 

71

141 

167 

170 

199 

267

May

340 

370 

370 

3SO 

390

400 

421 

464 

475 

497

519 

530 

530 

530 

530

530 

410 

340 

302 

2S4

284 

284 

284 

284 

321

340 

370 

400 

421 

421 

421

contents in 

Keechelus Lake 

(acre-feet)

-4,090 

+10,990 

+17,260

-36,130

+5,080 

+5,280 

+17,500 

+20,450 

-4,S70 

-15,740 

-39,290 

-24,210 

-3,070

-13,710

June

421 

421 

421 

421 

421

421 

421 

421 

421 

431

421 

421 

421 

421 

421

432 

442 

442 

443 

442

442 

442 

442 

442 

442

442 

442 

442 

442 

442

July

442 

475 

542 

612 

638

664 

706 

750 

765 

795

1,340 

S26 

706 

625 

625

625 

612 

600 

600 

600

600 

600 

625 

1,380 

1,340

1,340 

998 

486 

464 

464 

464

Aug.

464 

464 

464 

464 

464

464 

464 

464 

464 

464

442 

432 

432 

432 

432

432 

432 

432 

432 

442

464 

475 

475 

475 

475

475 

475 

475 

475 

475 

475

Sept.

464 

442 

400 

312 

244

214 

206 

206 

206 

206

206 

206 

206 

206 

206

206 

206 

206 

206 

206

206 

206 

206 

206 

206

206 

206 

206 

206 

297

Adjusted for change in 

reservoir contents

Hunoff 

in 

aore-feet

5,470 

11,600 

17,890

173,000

6,700 

5,840 

18,170 

23,180 

19,810 

9,920 

4,960 

3,940 

11,030

138,500

Discharge in 

second-foot

Per 

Mean square

mile

89.0 1.62 

195 3.5E 

291 5.24

23S 4.32

109 1.98 

105 1.91 

296 5.38 

390 7. OS 

322 5.8E 

167 3.04 

80.7 1.47 

64.1 1.17 

185 3.36

191 3.47

Ronla

Inches

1.86 

3.95 

6.10

58.88

2.28 

1.99 

6.19 

7.90 

6.75 

3.3S 

1.69 

1.34 

3.76

47.19
192 YAKIMA RIVER BASIN

Yaklraa River at Cle Elum, Wash.

Location.- Water-stage recorder, lat. 47°11'20", long. 120°56'40", In sec. 27, T. 20 N.,

 R. 15 E., at highway bridge at Cle Elum, Just upstream from Roslyn Creek and 7 miles

upstream from Teanaway River. 

Drainage area.- 500 square miles. 

Records available.- August 1906 to September 1941. 

Average discharge?- 35 years. 1,933 second-feet (adjusted for storage since October 1906

ana diversions since 1930). 

Extremes.- Maximum discharge during year, 3,200 second-feet (regulated) July 12 (gage

 height, 6.54 feet); minimum, 101 second-feet (regulated) Nov. 16 (gage height, 3.32

feet).

1906-41: Maximum discharge, 25,600 second-feet Nov. 14. 1906 (gage height, 12.5

feet, from floodmarks); minimum, 64 second-feet (regulated) Nov. 16, 17, 1929, Dec. 4,

1936. 

Remarks.- Records excellent. Klttltas high-line canal diverts water above gage for

 irrigation. Flow partly regulated by Keechelus, Kachess, and Cle Elum Lakes. Records 

of dally discharge not adjusted for amount of diversion or for change In contents of 

lakes.

Cooperation.- Records collected and prepared In cooperation with the Bureau of Reclamation.

Rating table, water year 194O-41 (gage height, in feet, and discharge, in second-feet)

3.4 123 4.3 580 6.0 8,370 

3.6 191 4.6 880 6.5 3,120 

3.8 278 5.0 1,190 

4.0 385 5.5 1,740

Discharge, in second- feet, water year October 1940 to September 1941

Day

1 

8 

3

4 

6

6 

7 

S 

9 

10

11 

18 

13 

14 

15

16 

17 

18 

19 

80

21 

28 

23 

24 

26

86

27 

28 

28 

30 

31

Oct.

671 

524 

524 

517 

490

439 

433 

427 

421 

445

458 

445 

445 

433 

458

452 

329 

803 

180 

177

159 

136 

145 

159 

145

115 

106 

103 

120 

136 

155

NOV.

155 

139 

126 

117 

112

106 

106 

118 

115 

109

109 

103 

103 

103 

103

118 

180 

123 

123 

126

129 

155 

173 

184 

220

228 

232 

340 

580 

719

Month

Oct( 

Nov<

Dec

Ca]

Jam 

Fob] 

Maw 

Apr 

May 

Jun< 

Julj 

Augi 

Sep1

Wa1

.endar year 1940

r... ............

,er year 1940-41

Doc.

595 

497 

284 

180 

487

838 

735 

928 

374 

191

580 

439 

314 

878 

87S

8SS 

837 

838 

884 

228

237 

846 

837 

837 

832

828 

228 

228 

228 

232 

220

Jan.

807 

191 

191 

191 

191

187 

184 

169 

169 

173

169 

169 

166 

169 

173

166 

173 

184 

187 

187

184 

180 

177 

177 

177

177 

173 

169 

169 

169 

169

Feb.

169 

173 

177 

177 

177

177 

184 

187 

191 

199

207 

207 

812 

203 

807

199 

169 

203 

187 

184

184 

184 

173 

184 

191

184 

184 

191

Mar.

220 

869 

888 

898 

298

250 

285 

264 

878 

888

335 

346 

346 

363 

340

850 

837 

340 

304 

283

278 

373 

873 

869 

273

278 

883 

309 

357 

679 

847

Observed

Discharge in 

second-feet

Maximum

671 

719 

988

5,350

807 

218 

847 

1,270 

1,620 

1,860 

8,650 

8,510 

1,860

8,650

Minimum

103 

103 

ISO

103

166 

169 

220 

888 

1,850 

982 

1,510 

1,860 

1,040

103

Mean

321 

176 

384

1,839

178 

188 

388 

598 

1,469 

1,254 

8,070 

2,874 

1,840

874

Runoff 

in 

acre-feet

19,710 

10,480 

19,900

899,200

10,940 

10,440 

19,780 

35,580 

90,350 

74,640

139,800 

73,770

632,700

Apr.

865 

937 

847 

769 

735

719 

655 

625 

610 

595

559 

524 

504 

497 

490

484 

439 

397 

374 

329

324 

319 

288 

329 

488

580 

711 

803 

910 

1,870

Change 

in 

contents 

acrefeet )t

+3,820 

+33,850 

+61,170

-171,400

+25,330 

+19,520 

+83,250 

118,000 

-9,650 

-48,010

170,100 

-44,310

-91,530

May

1,340 

1,370 

1,400 

1,400 

1,460

1,400 

1,460 

1,460 

1,510 

1,510

1,560 

1,560 

1,510 

1,460 

1,510

1,510 

1,680 

1,510 

1,460 

1,400

1,400 

1,460 

1,510 

1,510 

1,460

1,510 

1,510 

1,510 

1,510 

1,510 

1,850

Diverted 

by 

Kittitas 

Canal 

(acrefeet)

9,150 

0

0

261,200

0

0 

0 

6,290 

46,130 

42,700 

64,800 

47,470 

18,720

234,700

June

1,020 

982 

1,040 

1,090 

1,080

1,090 

1,110 

1,120 

1,120 

1,190

1,230 

1,260 

1,260 

1,260 

1,260

1,290 

1,290 

1,280 

1,250 

1,210

1,170 

1,230 

1,270 

1,300 

1,340

1,390 

1,460 

1,560 

1,620 

1,860

July

1,980 

2,040 

8,180 

2,300 

2,300

2,370 

8,370 

8,370 

8,510 

8,510

2,510 

2,650 

2,510 

2,300 

2,110

1,920 

1,740 

1,740 

1,680 

1,620

1,680 

1,680 

1,680 

1,510 

1,740

1,740 

1,740 

1,980 

2,110 

8,240 

2,370

Aug.

2,510 

2,510 

2,510 

2,370 

2,240

8,240 

2,240 

2,370 

2,440 

2,440

2,440 

2,370 

2,300 

2,300 

2,300

2,300 

2,300 

2,300 

2,300 

2,300

2,300 

8,300 

8,300 

2,300 

2,240

2,240 

2,110 

1,920 

1,920 

1,920 

1,860

Sept.

1,860 

1,860 

1,620 

1,620 

1,460

1,170 

1,190 

1,190 

1,210 

1,250

1,260 

1,200 

1,180 

1,170 

1,170

1,170 

1,180 

1,140 

1,130 

1,130

1,140 

1,090 

1.070 

1,050 

1,040

1,100 

1,150 

1,170 

1,160 

1,090

Adjusted

Runoff 

in 

acre-fee

Discharge in 

second-feet

t Mean

38,680 531 

44,330 745 

81,070 1,318

988,900 1,362

36,270 590 

29,960 539 

103,000 1,675 

159,900 8,687 

126,800 2,068 

69,330 1,165 

87,100 441 

17,170 879 

48,180 810

775,800 1,072

Per 

square 

mile

1.06 

1.49 

8.64

8.78

1.18 

l.OS 

3.35 

5.37 

4.12 

8.33 

.882 

.558 

1.62

8.14

Runin 

inches

1.22 

1.66 

3.04

37.08

1.36 

1.12 

3.86 

5.99 

4.75 

2.60 

1.02 

.64 

1.81

29.07

t Change in contents in Keechelus, Kachess and Cle Elum Lakes.
YAKIMA RIVER BASIN 193

Yakima River at Umtanum, Wash.

Location.- Water-stage recorder, lat. 46°51', long. 120°29', In NWi sec. 20, T. 16 N., R.

 19 E., at Umtanum, half a mile upstream from Umtanum Creek and 10 miles south of

Ellensburg. Datum of gage Is 1,300.0 feet above mean sea level, datum of 1929. 

Drainage area.- 1,620 square miles. 

Records available.- August 1906 to September 1921 (fragmentary) and October 19o5 to

 September 1941 In reports of Geological Survey. September 1906 to October 1928

(fragmentary) In State Water-Supply Bulletin 5. 

Extremes.- Maximum discharge during year, 3,100 second-feet Apr. 2 (gage height, o2.89

 feet); minimum, 228 second-feet Nov. 17 (gage height, 29.93 feet).

1906-41: Maximum discharge, 41,000 second-feet Nov. 15 or 16, 1906 (gage height,

41.1 feet, from floodmarks, present datum); minimum, 138 second-feet (regulated) Oct.

3, 1915 (gage height, 2.86 feet, datum then In use). 

Remarks.- Records excellent. Flow partly regulated by Keechelus, Kachess and Cle Elum

 Lakes (see p.196). Water diverted above station for irrigation of about 91,000 acres. 

Cooperation.- Records collected and prepared In cooperation with the Bureau of Reclamation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet) 

(Shifting-control method used Oct. 1-27, Jan. 4 to Feb. 18)

Oct. 1 to Feb. IS Feb. 19 to Sept. 30

30.1 332

30.3 470

30.5 624

30.7

31.0

31.3

795

1,090

1,430

30.5 650

30.7 S30

31.0 1,140

31.3 1,500

31.6 1,900

32.0 '2,550

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

b

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

2R

29

30

31

Oct.

1,260

1,130

1,030

1,010

968

927

867

828

782

781

807

788

769

777

775

829

773

602

493

470

455

425

403

526

572

524

457

420

399

427

470

Nov.

463

478

449

406

392

379

366

372

386

379

372

352

339

319

300

294

a300

a315

a340

a370

a430

a470

a550

a600

a660

a710

a750

a900

al,100

1,320

-

Dec.

1,120

1,050

890

769

814

960

990

1,260

1,200

814

769

871

804

900

920

769

715

592

561

725

990

a860

a565

a550

a537

a528

a522

a518

a515

a512

a510

Jan.

a490

a463

a455

485

493

4*71

4S6

471

450

,422

415

401

401

408

416

416

438

438

489

497

468

468

461

454

491

578

538

523

492

477

4S5

Feb.

532

525

509

510

541

575

750

891

S82

922

1,060

1,020

1,110

966

867

819

793

766

776

758

740

749

758

731

740

731

722

850

-

-

-

Montlj

December ...................................

Calendar year 1940 ......................

March.. ....................................

April ......................................

May. ......................................

July

September. .................................

Water year 1940-41 ......................

Mar.

1,370

1,700

1,630

1,540

1,470

1,400

1,370

1,380

1,460

1,420

1,370

1,350

1,270

1,220

1,180

1,160

1,210

1,320

1,420

1,330

1,230

1,150

1,140

1,100

1,080

1,130

1,220

1,360

1,490

2,050

2,550

Apr.

2,550

2,910

2,820

2,550

2,640

2,460

2,210

2,050

2,130

2,300

2,130

1,980

1,330

1,760

1,630

1,620

1,500

1,370

1,260

1,180

1,100

1,050

990

970

1,010

1,060

1,160

1,290

. 1,230

1,410

-

Seoondfoot-days

21,744

14,661

24,100

628,491

21,593

43,070

46,690

79,750

43,360

487,202

May

1,620

1,630

1,700

1,760

1,830

1,760

1,700

1,760

1,760

1,760

1,760

1,900

1,900

1,830

1,830

1,830

1,980

2,050

1,980

1,900

1,830

1,760

1,760

1,760

1,700

1,760

1,760

1,760

1,830

1,900

2,050

Maximum

1,260

1,320

1,260

6,480

1,110

2,550

1,900

2,380

2,910

June

1,90O

1,760

1,620

1,590

1,510

1,550

1,580

1,560

1,500

1,440

1,420

1,400

1,380

1,380

1,380

1,450

1,510

1,600

1,600

1,630

1,550

1,550

1,550

1,530

1,540

1,540

1,540

1,600

1,700

1,830

~

Minimum

399

294

510

294

401

509

1,030

970

1,620

1,380

2,300

1,270

294

July

2,050

2,050

2,130

2,300

2,380

2,330

2,460

2,460

2,460

2,460

2,460

2,550

2,550

2,330

2,210

1,980

1,760

1,700

1,760

1,700

1,700

1,700

1,700

1,700

1,600

1,760

1,760

1,760

2,050

2,130

2,300

Aug.

2,550

2,640

2,730

2,820

2,640

2,550

2,550

2,730

2,730

2,730

2,730

2,730

2,550

2,550

2,550

2,550

2,550

2,550

2,550

2,550

2,550

2,550

2,460

2,550

2,550

2,640

2,640

2,380

2,300

2,300

2,300

Mean

701

495

777

1,717

466

771

1,389

1,738

1,310

1,556

2,075

2,573

1,612

1,335

Sept.

2,300

2,330

2,210

2,130

2,050

1,830

1,700

1,620

1,590

1,620

1,630

1,620

1,550

1,530

1,540

1,630

1,500

1,500

1,500

1,490

1,470

1,420

1,380

1,350

1,270

1,270

1,300

1,350

1,370

1,360

~

Runoff in 

acre-feet

43,130

29,480

47,800

1,247,000

23,630

42,330

85,430

103,400

111,300

92,610

127,600

158,200

95,920

966,300

a Ho gage-height record; discharge computed on basis of records for station at Cle Elum.
194 YAKIMA RIVER BASIN

Yakima River near Parker, Wash.

Location.- Water-stage recorder, lat. 46°29'40", long. 120°26'10", In sec. 88, T. 12 N., 

h. 19 E., Just downstream from Sunnyslde diversion dam, It miles east of Parker and 

about 3 miles downstream from Ahtanum Creek.

Drainage area.- 3,560 square miles.

Records available.- April 1908 to September 1921, October 1931 to September 1941.

Extremes.- Maximum discharge during year, 3,850 second-feet Apr. 3 (gage height, 5.26 

feet); minimum, 7 second-feet Apr. 18 (gage height, 0.39 foot). '

1908-21, 1931-41: Maximum discharge, 54,300 second-feet Dec. 23, 1933 (gage height, 

15.0 feet, from floodmarks); practically no flow several days during latter part of 

Irrigation seasons as result of diversions.

Remarks.- Records good except those for periods of shifting control, which are fair. 

Water diverted above station for Irrigation of a large area. Flow partly regulated 

by diversions and by Keechelus, Kachess, Cle Elura, and Bumping Lakes, and Tleton 

Reservoir (see p. 196). Record of dally discharge not adjusted for diversions or for 

change In contents of reservoirs.

Cooperation.- Records collected and prepared In cooperation with the Bureau of Reclamation 

and the office of Indian Affairs.

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

S

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29 

30

31

Oct.

168

79

68

118

59

35

32

32

26

30

86

36

31

55

191

165

254

191

36

18

163

488

494

864

1,350

1,300

1,210

1,160

1,160 

1,120

1,120

Month

October. . .

November. .

December. .

Calendar

Year 1940-

January. . .

February. .

narch.. ..

April.. .. 

May.... ..

June ...

July... ..

August . . .

September.

Water year 

1940-41..

NOV.

1,300

1,210

1,210

1,350

1,210

944

1,120

830

992

1,030

1,020

1,010

976

936

912

904

904

396

960

v 880

896

896

944

920

928

952

1,020

1,020

1,400 

2,47O

Dec.

2,620

2,040

1,830

1,510

1,400

1,700

1,630

1,830

2,040

1,630

1,260

1,350

1,260

1,160

1,120

1,210

1,210

1,400

1,400

1,460

2,180

2,040

1,630

1,510

1,510

1,400

1,400

1,300

1,210 

1,160

1,160

Jan.

1,080

1,020

976

1,020

1,080

1.080

1,040

1,080

1,040

1,010

960

944

923

960

952

920

984

1,210

1,400

1,160

1,080

1,040

1,040

1,040

1,120

1,350

1,120

1,080

1,040 

1,040

1,040

Feb.

1,080

1,120

1,120

1,120

1,120

1,160

1,300

1,510

1,570

1,570

1,830

1,760

1,760

1,700

1,350

1,210

1,350

1,300

1,300

1,300

1,300

1,300

1,300

1,350

1,300

1,300

1,300

1,400

-

~

Mar.

1,970

2,850

2,930

2,850

2,540

2,400

2,320

2,250

2,540

2,700

2,620

2,250

2,180

2,110

1,330

1,700

1,630

1,630

1,830

1,760

1,460

1,210

984

8S8

316

702

681

736

1,040 

1,630

3,010

Apr.

3,090

3,420

3,680

3,010

3,010

2,400

1,900

1,510

1,350

1,350

1,160

960

765

423

146

32

21

20

41

53

54

62

40

49

51

63

75

63

28

79

"

Mean discharge in aecond-feet

Yakima 

River 

near 

Parker

392

1,070

1,534

1,134

1,059

1,360

1,874

965 

168

110

107

142

195

744

Union 

Sap 

Canal 

( estimated)

5

_

-

-

5

30 

40

40

40

35

25

-

New 

Reservation 

Canal

487

0

0

865

0

0

237

1,359 

Xf 856

1,523

1,700

1,553

1,164

328

Old Reservation 

Oanal

1.13

10.6

5.17

397

1.84

2.48

10.8

55.9 

48.9

IS. 3

13.6

S.66

4.17

15.2

Sunnyaide 

Canal

434

0

0

646

0

0

224

948

1,142 

1,066

1,097

1,059 '677

557

May

375

177

133

71

103

48

39

92

43

67

34

482

542

151

46

59

365

365

139

194

46

30

50

168

53

82

75

52

207 

216

325

Combined 

flow, 

Yakima 

River and 

canals

1,319

1,081

1,539

2,765

1,061

1,362

2,351

3,368 

3,245

2,757

8,958

2,798

2,066

2,163

June

166

123

41

154

94

43

240

171

203

60

94

109

74

107

48

73

216

207

174

154

73

31

128

99

74

47

38

73

39 

142

Change in

contents equivalent mean secondfeet)t

-102

+640

+1,395

-256

+569

+485

+1,779

+2,471 

-247

-1,415

-3,305

-3,351

-1,073

-232

July

75

68

62

35

131

109

166

76

36

51

174

207

65

73

39

119

122

161

365

237

76

64

107

105

39

135

28

39

161 

61

42

Aug.

143

270

174

355

232

70

22

143

270

100

123

244

94

24

36

135

45

63

95

197

56

71 55

71

144

345

345

210

39 

76

23

Sept.

116

699

944

730

646

470

186

91

37

35

100

154

114

39

51

105

103

133

171 '

230

128

139

111

56

26

22

83

52

40 

S3

Combined flow of Yakima 

River and canals adjusted for change in 

contents^

Secondfeet

1,217

1,721

2,934

2,499

1,630

1,847

4,130

5,329 

2 993

1^342

-847

-563

993

1,931

Runoff in 

acre-feet

74,830

102,400

130,400

1,314,000

100,200

102,600

253,900

346.800

184,300 

79,850

**-52,080

**-34,620

59,090

1,393,000

t Change in contents in Keeohelus, Kachess, Cle Elum, and Bumping Lakes and Tieton Reservoir. 

J Totals are equivalent with monthly results previously determined for Yakima River at Union Gap, 

near Yakima, Wash.

** Negative results due to unrecorded diversions.

Note.- Shifting-control method used Oct. 1-21 (a.m.), Apr. 21 to Sept. 30.
YAKIMA RIVER BASIN 195

Yakima River at Klona, Wash.

Location.- Water-stage recorder, lat. 46°15'10", long. 119°28'50", In sec. 19, T. 9 N.,

R. £7 E., at highway bridge at Kiona, 3| miles downstream from intake of Kiona Canal

and 25 miles upstream from mouth. 

Drainage area.- 5,520 square miles.

Records available.- August 1896 to March 1915, February 1933 to September 1941. 

Extremes.- Maximum discharge during year, 4,520 second-feet Apr. 3 (gage height, 5.92

feet); minimum, 840 second-feet Apr. 26, 27 (gage height, 2.90 feet).

1896-1915, 1933-41: Maximum discharge, 71,100 second-feet Dec. 23, 1933 (gage

height, 21.57 feet); minimum, 105 second-feet (regulated) Sept. 11, 1906 (gage height,

2.35 feet). 

Remarks.- Records excellent except those July to September, which are good. Water diverted

above gage for irrigation of large acreage. Flow partly regulated by diversions and by

Keechelus, Kachess, Cle Elum, and Bumping Lakes, and Tieton Reservoir (see p.196). 

Cooperation.- Records collected and prepared in cooperation with the Bureau of Reclamation.

Rating table, water year 1940-41 (gage height, In feet, and discharge, In second-feet)

3.0 900 4

S.2 1,030 5

3.5 1,270 5

4.0 1,800

5 2,430

0 3,120

5 3,880

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

Z

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

1,860

1,860

1,800

1,740

1,740

1,680

1,620

1,570

1,520

1,520

1,520

1,520

1,570

1,520

1,460

1,460

1,620

1,620

1,620

1,570

1,570

1,740

1,800

1,860

2,040

2,560

2,630

2,500

2,430

2,430

2.30O

Nov.

2,300

2,360

2,360

2,240

2,300

2,300

2,040

2,170

1,980

1,980

2,040

1,980

1,980

1,920

1,920

1,860

1,800

1,800

1,800

1,800

1,740

1,740

1,740

1,800

1,740

1,740

1,740

1,800

1,800

2,040

-

Dec.

2,910

3,120

2,840

2,560

2,360

2,170

2,36O

2,430

2,500

2,630

2,430

2,100

2,040

1,980

1,920

1,860

1,860

1,860

2,040

2,170

2,560

3,200

2,980

2,700

2,500

2,430

2,360

2,300

2,170

2,100

2,040

Jan.

1,980

1,860

1,800

1,800

1,800

1,800

1,860

1,800

1,800

1,800

1,740

1,680

1,680

1,680

1,740

1,740

1,800

2,170

2,430

2,700

2,360

2,170

2,100

2,040

2,040

2,240

2,770

2,360

2,170

2,100

2,040

Feb.

1,980

2,040

2,100

2,100

2,040

2,040

2,040

2,170

2,430

2,500

2,500

2,770

2,700

2,700

2,630

2,360

2,100

2,240

2,170

2,100

2,100

2,100

2,100

2,170

2,100

2,100

2,100

2,100

_

_

-

Month

October1 . ...................................

November. ..................................

December ..................................

Calendar year 1940 ......................

January. ...................................

February ...................................

March. .....................................

April ......................................

Unv nay. .......................................

June .......................................

July. ......................................

August .....................................

September. .................................

Water year 1940-41 ......................

Mar.

2,300

2,980

3,880

3,880

3,720

3,500

3,420

3,480

3,420

3,500

3,500

3,420

3,200

3,050

2,980

2,700

2,560

2,500

2,560

2,700

2,630

8,560

2,500

2,360

2,170

2,040

2,040

1,980

2,040

2,300

2,840

Apr.

s.eao

4

4

4

,040

,360

,520

4,040

3,880

!

3

£

,570

,120

,770

2,560

8.500

2

Z

Z

,430

,170

.040 i^aoo

1,360 1

1

1

,220

,140

.060

1^000

Seoondfoot-days

56,250

58,750

73,480

879,060

62,050

62,580

'88,650

62,280

39,470

41,750

38,070

40,850

48,660

672,840

960

930

900

900

870

840

840

870

870

840

-

May

870

930

1,100

1,030

1,100

1.060

1,060

1,060

1,060

1,100

1,100

1,140

1,270

1,620

1,460

1,380

1,270

1,360

1.620

1,520

1,360

1,360

1,87C

1,870

1.87C

1,32C

1,380

1.36C

1,520

1,570

1.80C

Maximum

2,630

2,360

3,200

6,660

2,770

8,770

3,880

4,520

1,800

1,860

1,460

1,800

2,300

4,580

June

1,860

1,860

1,860

1,620

1,570

1,570

1,620

1,680

1,680

1,570

1,460

1,360

1,270

1,180

1,140

1,140

1,100

1,180

1,870

1,270

1,270

1,270

1,220

1,180

1,460

1,380

1,270

1,180

1,140

1,180

-

Minimum

1,460

1,740

1,860

1,030

1,680

Ij98(

1,980

840

870

1,100

1,100

1,060

1,270

840

July

1,140

1,220

1,140

1,180

1,180

1,280

1,270

1,270

1,180

1,180

1,180

1,380

1,360

1,410

1,870

1,180

1,100

1,100

1,180

1,410

1,460

1,360

1,320

1,220

1,180

1,180

1,180

1,180

1,180

1,140

1,180

Aug.

1,140

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

Mean

1,815

1,958

2,370

2,402

2,002

2,235

2,860

8,076

1,273

1,392

1,228

1,318

1,622

1,843

060

180

880

270

360

220

140

100

180

220

180

220

270

ISO

140

180

180

180

180

270

360

320

320

460

680

740

800

800

680

620

Sept.

1,570

1,570

1,800

8,300

2,240

2,170

2,040

1,860

1,680

1,680

1,570

1,570

1,620

1,620

1,570

1,460

1,460

1,580

1,520

1,570

1,620

1,570

1,580

1,460

1,460

1,410

1,380

1,270

1,380

1,380

~

Runoff in 

acre-feet

111,600

116,500

145,700

1 « 744 1 000

123,100

124,100

175,800

123, 500

7Sj290

82 810 75)510

81,020

96,520

1,334,000
196 YAKIMA RIVER BASIN 

Reservoirs In Yakluia River Basin, Wash.

Keechelus Lake, on Yaklma River, 3t miles northwest of Martin, completed in 1917 for

 irrigation, has usable capacity of 153,000 acre-feet at spillway crest. Records furnished by Bureau of Reclamation.

Kachess Lake, on Kachess River, 2i miles northwest of Easton, completed in 1912 for

 irrigation, has usable capacity of 239,000 acre-feet at spillway crest. Records furnished by Bureau of Reclamation.

Cle Elurn Lake, on Cle Elum River, 4 miles northwest of Roslyn, completed in 1933 for

 Irrigation, has usable capacity of 436,000 acre-feet at spillway crest. Records furnished by Bureau of Reclamation.

Bumping Lake, on Bumping River, 12 miles upstream from American River, 19 miles west of

 Nile, completed in.1910 for irrigation, has usable capacity of 33,800 acre-feet at 

spillway crest. Records furnished by Bureau of Reclamation.

Tleton Reservoir, on Tieton River just upstream from Wild Cat Creek at Rimrock, 22i miles

 southwest of Naches, completed in 1925 for irrigation, has usable capacity of 197,000 

acre-feet at spillway crest. Records furnished by Bureau of Reclamation.

Clear Creek Reservoir, on North Fork of Tieton River, 28 miles southwest of Naches, com-

 pleted In 1918 for irrigation, has usable capacity of 5,300 acre-feet at .spillway 

crest. No records for this reservoir.

Monthly gage height and contents, water year October 1940 to September 1941

Date

Dec. 31............

Calendar year 1940

Water year 1940-41

Dec. 31............

Calendar year 1940

Water year 1940-41

Keechelus Lake

Cage 

height 

(feet)t

43.92 

40.79 

49.12 

61.65

-

65.84 

69.33 

79.92 

90.78 

88.32 

79.83 

54.06 

35.73 

33.32

-

Contents 

(acrefeet)

24, 180 

30,090 

31,080 

48, 340

54,420 

59,700 

77,200 

97,650 

92,780 

77,040 

37,750 

13, 540 

10,470

-

Change In 

contents 

during 

month 

(acrefeet)

-4,090 

+10,990 

+17, 260

-36, 130

+6,080 

+5, 2SO 

+17, 500 

+20,450 

-4,870 

-15,740 

-39,290 

-24,210 

-3,070

-13,710

Bumping Lake

93.00 

93.41 

97. 2S 

106.59

-

104.97 

102.94 

113.18 

118. S7 

119 . 17 

112.87 

101.88 

93.21 

93.05

-

2,540 

2.S10 

5,390 

12,520

-

11,150 

9,520 

18, 750 

24,960 

25,300 

18, 430 

8,710 

2,680 

2,570

-

+270 

+2,580 

+7,130

-3, 140

-1,370 

-1,630 

+9,230 

+6,210 

+340 

-6,870 

-9,720 

-6,030 

-110

+30

Kachess Lake

Gage 

height 

(feet)t

26.73 

27.05 

29.12 

32.78

-

34.50 

35.72 

40.20 

45.43 

43.61 

40. S7 

26.56 

19.71 

19.49

-

Contents 

(acrefeet)

96,980 

98, 100 

105,400 

118,680

-

124,920 

129,450 

146,520 

167,360 

169,980 

149,130 

96,390 

75,680 

75,050

-

Change In 

contents 

during 

month 

(acrefeet)

+1,120 

+7,300 

+13,180

-8,930

+6,340 

+4, 530 

+17,070 

+80,840 

-7,380 

-10,850 

-52,740 

-20,710 

-630

-21,930

Tieton Reservoir

74.07 

67.67 

68.71 

79.22

-

85.37 

90.17 

98.73 

109.47 

106.77 

92.51 

56.86 

31.60 

7.55

90,540 

80, ISO 

81,820 

99,320

-

110,340 

119,360 

136,290 

159,060 

153, 170 

123,880 

63,990 

33,460 

14, 040

-

-10,360 

+1,640 

+17,500

-11,140

+11,020 

+9,020 

+16,930 

+22,770 

-5,890 

-29,290 

-59,890 

-30,530 

-19,420

-76, 500

Cle Elum Lake

Gage 

height 

(feet)t

51.50 

53.85 

59.04 

68.69

-

72.55 

75.39 

88.94 

108.43 

109.06 

103.82 

85.04 

46.04 

29.26

-

Contents 

(acrefeet)

95,190 

101, 980 

117, 540 

148,270

-

161, 180 

170,890 

219,570 

896,330 

298,930 

277,510 

205, 170 

79,990 

39,380

-

Change In 

contents 

during 

month 

(acrefeet)

+6,790 

+15,560 

+30,730

-126, 500

+12,910 

+9,710 

+48,680 

+76,760 

+2,600 

-21, 420 

-72,340 

-125,200 

-40, 610

-55,830

tGage height la mean for the day.
YAKIMA. RIVER BASIN 197

Kachess River near Easton, Wash.

Location.- Water-stage recorder, lat. 47°15'30", long. 121°11'50", In sec. 3, T. 20 N., 

R. 13 E., three-quarters of a nile downstream from Kachess Lake and 2 miles northwest 

of Easton.

Drainage area.- 64 square miles.

Records available.- October 1903 to September 1941.

Average discharge.- 38 years, 282 second-feet (adjusted for storage since October 1905).

Extremes (regulated).- Maximum discharge during year, 1,960 second-feet July 11 (gage

 height, 6T53 feet); no flow Oct. 22-27, Nov. 3-28, Dec. 13-19.

1903-41: Maximum discharge, 2,240 second-feet (computed from gate opening) Aug. 

27, 1920; no flow when gates In dam are closed. 

Remarks.- Records good except those for extremely low flow, which are poor. No diversion.

 Flow regulated by Kachess Lake (see p. 196). Record of dally discharge not adjusted

for change In contents of Kachess Lake. 

Cooperation.- Records collected and prepared In cooperation with the Bureau of Reclamation.

Rating tables, water year 1940-41 (gage height, In feet, and discharge, In second-feet) 

(Shifting-control method used June 4-16, Aug. 6 to Sept. 8)

Oct. 1 to June 16 June 17 to Sept. 8 Sept.9-30

0.6 0.5 2.0 43 2.2 86 4.0 660 2.0 39 

.8 l.S 2.5 119 2.6 162 5.0 1,120 2.5 108 

1.0 2.5 3.0 245 3.0 270 6.0 1,660 3.0 227 

1.3 5 3.5 420 3.6 447 3.5 383 

1.6 14 4.0 620 4.0 674

Discharge , In second- feet , water year October 1940 to September 1941

Day

1 

2 

S 

4

e

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

204 

186 

166 

132 

96

66 

66 

66 

66 

68

70 

70 

70 

66 

38

14 

14 

14 

14

7

2 

0 

0 

0 

0

0 

0 

16 

33 

33 

33

Nov.

15 

1 

0 

0 

0

0 

0 

0 

0 

0

0 

0 

0 

0 

0

0 

0 

0 

0 

0

0 

0 

0 

0

0

0 

0 

0 

2 

2

Month

oet< 

NOT*

Deo<

Ca]

Jam 

Fob] 

Mart 

Apr! 

Kay 

June 

Julj 

Augv 

Sept

Wat

Lendar year 1940

er year 1940-41

Dec.

2

1 

1 

1

1

2 

2 

2 

2

1 

1 

0 

0 

0

0 

0 

0 

0

1

1 

1 

1

1 

1

1 

1 

1 

1 

1 

1

Jan.

1 

1 

1 

1 

1

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1

1 

1

1

1 

1 

1 

1

1 

1 

1 

1 

1 

1

Feb.

1 

1 

1 

1 

1

1 

1 

1 

1

1 

1 

1 

1 

1

1 

1 

1 

1

1

1 

1 

1 

1 

1

1 

1 

1

Mar.

1 

1 

1 

1 

1

1 

1 

1 

1

1 

2

1 

1 

1

1 

1 

2 

2 

2

2 

2

1 

1 

1

1 

1 

1 

1 

2 

2

Observed

Discharge In 

second-feet

Mazl204 

15 

2

795

1 

1 

2 

215 

537 

760 

1,550 

546 

566

1,550

Minimum

0 

0 

0

0

1 

1 

1 

1

215 

196 

526 

82 

61

0

Mean a

Runoff 

In 

era-feet

52.5 3,230 

.7 40 

.9 58

210 152,500

1.0 61 

1.0 56 

1.3 77 

41 2,440 

403 24,750 

320 19,030 

863 54,320 

369 22, 700 

127 7,560

166 134,300

Apr,

2 

2 

2 

2 

2

2

1 

1

1

1 

1 

1 

1 

1

1 

1 

1 

1

1

1 

1 

10 

110 

140

140 

168 

204 

215 

215

May

215 

242 

264 

326 

346

368 

405 

420 

447

465

517 

537 

537 

517 

497

485 

454 

412 

401

375

364 

364 

364 

390 

401

401 

401 

401 

401 

376 

34£

June

237 

261 

251 

247 

240

226 

211 

200 

196 

208

236 

256 

276 

291 

306

317 

319 

309 

263 

252

223 

223 

255 

312 

372

426 

506 

606 

714 

760

July

648 

S94 

942 

942 

990

1,060 

1,090 

1,090 

1,120 

1,140

1,550 

1,140 

1,170 

1,040 

648

650 

567 

567 

567 

567

567 

546 

526 

1,170 

1,330

1,260 

1,040 

526 

526 

546 

546

Aug.

546 

546 

526 

526 

466

445 

414 

404 

380 

364

363 

361 

359 

358 

356

355 

336 

317 

316 

315

334 

359 

411 

450 

482

431 

305 

221 

173 

123 

62

Sept.

68 

67 

66 

64 

64

63 

63 

62 

108 

149

65 

61 

61 

61 

61

61 

61 

61 

61 

61

61 

61 

71 

101 

171

268 

336 

369 

383 

566

Adjusted for change In 

reservoir contents

Change In 

contents 

In 

Kachess Lake 

(acre-feet)

+1,120 

t7,300 

+13,160

-8,930

+6,340 

+4,530 

+ 17,070 

+20,840 

-7,380 

-10,650 

-52,740 

-20,710 

-630

-21,930

Runoff 

In 

acre-feet

4,350 

7,340 

13,240

143,500

6,400 

4,590 

17, 150 

23,260 

17,370 

6,160 

1,530 

1,990 

6,930

112,400

Discharge In 

second-feet

Mean

70.7 

123 

215

196

104 

82.6 

279 

391 

262 

137 

25.7 

32.4 

116

155

Per 

square

Bile

1.10 

1.92 

3.36

3.09

1.62 

1.29 

4.36 

6.11 

4.41 

2.14 

.402 

.506 

1.61

2.42

Run*

In 

Inches

1.27 

2.14 

3.67

42.03

1.67 

1.34 

5.03 

6.62 

5.08 

2.39 

.46 

.58 

2.02

32.67
198 YAKIMA RIVER BASIN

Cle Elum River near Roslyn, Wash.

Location.- Water-stage recorder, lat. 47°14'00", long. 131°03 1 30'1 , in SWt sec. 11, T. 20 

N., R. 14 E., 1,000 feet downstream from dam at Cle Elum Lake and 4 miles northwest 

of Roslyn.

Drainage area.- 302 square miles.

Records available.- October 1903 to September 1941.

Average discharge.- 38 years, 895 second-feet (adjusted for storage since January 1906).

Extremes (regulated).- Maximum discharge during year, 2,530 second-feet July 31 (gage 

height, 8.37 feet); minimum, 2 second-feet Nov. 4-8, Dec. 10-15, July 24-27, when 

gates in dam at Cle Elum Lake were closed.

1903-41: Maximum discharge, 18,700 second-feet Nov. 15, 1906 (gage height, 14.05 

feet); practically no flow when gates in dam are closed.

Remarks.- Records excellent except those below 100 second-feet, which are fair. No

diversion above station. Flow partly regulated by Cle Elum Lake (see p. 196 ) Record 

of daily discharge not adjusted for change in contents of Cle Elum Lake.

Cooperation.- Records collected and prepared in cooperation with the Bureau of Reclamation.

Rating tables, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

Oct. 1 to July 24 July 24 to Sept. 30

4 -l 4 5.0 220 7.0 1,250 4.3 16 5.0 2O4 6.5 950

4 -3 IS 5.5 430 S.O 2,040 4.5 46 5.5 409 7.0 1,300 

4 -5 54 6.0 660 4.7 98 6.0 650 S.O 2,150 

4.7 109 6.5 930

Discharge, In second- feet, water year October 1940 to September 1941

Day

1 

Z 

3 

4 

6

6

7

e

9 

10

11

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

26

26 

27 

28 

29 

30 

31

Got.

391 

282 

2S2 

262 

269

261 

261 

261 

261 

261

261 

261 

261 

261 

261

261 

149 

44 

44 

44

34 

34 

31 

21 

21

21 

21 

21 

21 

21 

21

Hov.

21 

21 

21 

9 

a2

a2 

aS 

15 

21 

23.

21 

21 

21 

21 

21

21 

21 

21 

21 

21

21 

21 

21 

21 

13

13 

13 

13 

13 

14

Month

dot 

HOvr

Dec

Ca.

Jam 

Pebi 

Maw 

Apr] 

May 

*Pun 

Jul: 

Aug» 

Sep1

Wa1

Lendar year 1940

,er year 1940-41

Dec.

23 

23 

23 

23 

23

24 

24 

24 

24 

9

a2 

a2 

a2 

a2 

13

24 

24 

24 

24 

24

26 

26 

26 

26 

26

26 

28 

26 

28 

28 

26

Jan.

28 

28 

28 

28 

2S

2S 

2S 

29 

29 

29

29 

29 

29 

29 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

31 

31

Feb.

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31

Mar.

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

31 

31 

31 

34

34 

34 

34 

34 

34 

34

Observed

Discharge in 

second-feet

Maximum

391 

21 

2S

3,900

31 

31 

34 

930 

1.3SO 

1,390 

2,390 

2,440 

1,790

2,440

Minimum

21 

2 

2

2

28 

31 

31 

34 

960 

816 

2 

1,790 

660

2

Mean

159 

16.9 

21.2

837

29.9 

31.0 

31.7 

133 

1,128 

1,044 

1,406 

2,221 

1,085

614

Runoff 

In 

acre-feet

9,770 

1,010 

1,300

607,600

1,840 

1,720 

1,950 

7,890 

69,360 

62, 120 

86,380 

136,500 

64,570

444,400

Apr.

34 

34 

36 

36 

38

38 

38 

38 

38 

38

38 

38 

38 

38 

38

38 

38 

38 

38 

38

38 

38 

38 

87 

196

316 

430 

496 

660 

930

May

960 

990 

1,020 

1,020 

1,050

1,050 

1,080 

1,080 

1,080 

1,080

1,080 

1,080 

990 

990 

1,050

1,080 

1,120 

1,120 

1,120 

1,150

1,220 

1,250 

1,280 

1,280 

1,280

1,280 

1,280 

1,320 

1,320 

1,280 

990

contents in 

Cle Elum Lake 

(acre-feet)

t6.790 

+15,560 

+30,730

-126,500

+12,910 

+9,710 

+48,680 

+76,760 

+2,600 

-21,420 

-72,340 

-125, 200 

-40,610

-55,830

June

844 

816 

901 

930 

930

930 

930 

960 

960 

1,020

1,050 

1,050 

1,050 

1,080 

1,080

1,120 

1,120 

1,080 

1,050 

1,020

1,020 

1,080 

1,080 

1,080 

1,080

1,120 

1,150 

1,180 

1,220 

1,390 

-

July

1,470 

1,500 

1,580 

1,620 

1,580

1,580 

1,580 

1,580 

1,580 

1,580

697 

1,540 

1,540 

1,540 

1,540

1,540 

1,540 

1,500 

1,500 

1,600

1,500 

1,500 

1,500 

669 

a2

a2 

21 

1,660 

1,920 

2,100 

2,390

Aug.

2,440 

2,440 

2,440 

2,290 

2,200

2,240 

2,390 

2,440 

2,440 

2,440

2,440 

2,340 

2,290 

2,290 

2,290

2,290 

2,290 

2,290 

2,290 

2,290

2,240 

2,200 

2,200 

2,150 

2,100

2,060 

1,870 

1,790 

1,790 

1,790 

1,790

Sept.

1,790 

1,620 

1,490 

1,450 

1,340

1,150 

1,120 

1,120 

1,120 

1,080

1,080 

1,050 

1,050 

1,050 

1,020

1,020 

1,020 

1,020 

1,020 

1,020

983 

983 

950 

950 

918

886 

886 

855 

855 

660

Adjusted for change in 

reservoir contents

Runoff 

in 

aore feet

16,560 

16,570 

32,030

461,100

14,750 

11,430 

50,630 

84,650 

71,960 

40, 700 

14,040 

11,300 

23,960

388, 600

Discharge In 

second- feet

Mean

269 

278 

521

663

240 

206 

623 

1,423 

1,170 

684 

228 

184 

403

537

Per 

square 

mile

1.33 

1.38 

2.58

3.28

1.19 

1.02 

4.07 

7.04 

5.79 

3 39 

l'.13 

.911 

2.00

2.66

In 

Inohas

1.54 

1.54 

2.97

44.68

1.37 

1.06 

4.70 

7.86 

6.68 

3.78 

1.30 

1.05 

2,22

36.07

a No gage-height record because gates were closed; discharge estimated.
YAKIMA. RIVER BASIN 199

Naches River below Tieton River, near Maches, Wash.

Location.- Water-stage recorder, lat. 46°44'40", long. 120046'00n , In SWiNEi sec. 36, T.

 15 N., R. 16 E., half a mile downstream from Wapatox power canal, three-quarters of a 

mile downstream from Tieton River, and 3i miles northwest of Naches. Datum of gage is 

1,550 feet above mean sea level.

Drainage area.- 943 square miles.

Records available.- August to October 1905, November 1908 to October 1912, May 1915 to

 September 1941 (October 1928 to September 1935 yearly summaries only), in reports of 

Geological Survey. September 1905, October 1908 to September 1912, June 1915 to 

September 1929 (mean monthly discharge), in State Water-Supply Bulletin 5.

Average discharge.- 29 years (1908-12, 1916-41), 1,628 second-feet (adjusted for diver-

 slons by Selah Valley and Tieton Canals since 1909, city of Yakima at Oak Flat since 

1935, and by Wapatox Canal since 1936, and adjusted for change In contents In Bumping 

Lake Reservoir since November 1910, and in Tieton Reservoir since October 1924).

Extremes.- Maximum discharge during year, 1,740 second-feet May 17 (gage height, 12.40

 feet); minimum, 2 second-feet Dec. 31 (gage height, 9.21 feet).

1905, 1908-12, 1915-41: Maximum discharge, 32,200 second-feet Dec. 22, 23, 1933

(gage height, 14.33 feet, site and datum then In use); minimum, 2 second-feet

(regulated) Jan. 7, 1937, Dec. 31, 1940. Remarks.- Records good except those for period of ice effect, and those below 50 second-

 feet, which are fair. Flow regulated by Bumping Lake and Tieton Reservoir, by diversion at Oak Flat for supply of city of Yakima, and by diversion of Selah Valley, Tieton, 

and Wapatox Canals. Records of dally discharge not adjusted.

Cooperation.- Station is maintained by Bureau of Reclamation in cooperation with Pacific

 Power & Light Co. Records collected and prepared In cooperation with the Bureau of 

Reclamation. Information concerning municipal diversion at Oak Flat, which Is very 

snail in relation to flow past station, furnished by water superintendent of city of 

Yakima.

Discharge, In second-feet, water year October 1940 to September 1941

Day

1

Z

3

4

e

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

26

26

27

28

29

30

31

Oct.

68

78

79

41

38

71

71

57

66

64

57

57

58

64

41

39

32

60

53

56

66

51

56

86

83

38

30

33

38

45

64

Month

October... .

November. . .

December. . .

Calendar

year 1940

January. ...

February. . .

Harch. .....

April...... 

Hay........

August .....

September. .

Water year

1940-41

Nov.

49

39

31

22

16

21

22

38

24

19

24

21

19

16

19

19

15

12

14

24

20

14

8

20

21

IS

21

44

456

336

-

Deo.

69

17

14

33

63

144

48

28

18

*8

4

3

3

bll

D230

D350

b320

b295

b250

b!50

144

106

76

41

14

7

6

5

4

3

*3

Jan.

3

3

3

7

11

16

44

41

11

7

6

6

6

6

5

5

5

7

9

4

6

9

9

8

9

9

8

8

7

7

7

Feb.

15

15

12

10

10

10

11

10

11

12

12

11

10

9

12

12

*13

12

10

9

9

9

9

9

9

8

7

10

_

-

-

Observed

Discharge in 

second-feet

Maximum

86

456

350

4,310

44

15

1,210

1,590 

1,630

1,470

1,250

115

103

1,630

 Sir *-

30 56.1

8 47.4

3 79.6

3 5S2

3 9.4

7 10.6

38 214

532 1,058 

870 1,263

570 1,056

206 730

53 94.4

36 70 . 2

3 392

Runoff 

in 

acre-feet

3,450

2,820

4,890

422,900

579

587

13,140

62,940 

77» 630

62 870

44^870

5,810

4,160

283,800

Mar.

85

196

169

131

93

«60

70

113

172

175

154

134

108

66

38

59

131

244

265

206

157

131

110

89

85

123

217

347

490

998

1,210

Change In 

contents 

in Bumping Lake 

and Tletoi 

Reservoirs 

; acre-feet

-10,090

+4,220

+24,630

-14,280

+9,650

+7,390

+26,160

+28,980

-5,550 

-36,160

-69,610

-36,560

-19,530

-76,470

Apr.

1,240

1,590

1,460

1,280

1,220

1,060

922

851

880

SSO

794

716

645

602

608

596

532

615

860

1,010

1,140

1,250

1,310

1,420

1,460

1,460

1,370

1,240

1,210

1,510

May

1,630

1,480

1,400

1,190

1,200

1,090

1,240

1,250

1,210

1,210

1,310

1,540

1,480

1,160

1,190

1,240

1,510

1,150

1,070

1,190

1,140

1,250

1,340

1,380

1,390

1,350

1,260

1,200

1,210

1,010

870

Diversions 

by Tieton, 

Jelah Valley 

and Wapatox 

Canals and 

City of 

Yakima 

(acre-feet)

26,760

23,000

23,070

477,500

22,870

22,860

34,560

40,700

59,220 

46 910

58^240

51,370

39,570

449,100

June

668

570

S42

975

944

902

a923

944

933

986

1,070

1,040

1,340

1,350

1,370

1,470

1,370

1,200

1,150

1,060

996

1.17C

1.25C

1.11C

1.04C

l,0l£

1.02C

1.06C

98e

944

-

July

804

775

716

638

563

538

468

387

352

387

362

269

206

393

638

964

1,100

1,250

1,240

1,110

1,030

1,080

1,100

1,030

1,040

1.01C

97e

88C

652

361

30C

Aug.

103

53

101

93

85

S7

115

98

96

93

110

93

63

105

110

96

96

101

113

93

9S

89

87

96

98

78

89

101

89

85

93

Sept.

98

S3

70

96

89

S9

78

80

103

98

101

83

87

89

91

66

74

40

39

55

57

51

48

40

48

70

36

39

67

51

~

Adjusted for change in reservoir contents and diversions

Runoff 

in 

acre-feet

20,120

30,040

52,590

886,100

33,100

30,640

73,860

132,600 

131,300

73, 620

33,500

20,620

24,220

656, 400

Discharge in 

second-feet

Mean

327

505

855

1,221

538

555

1,201

2,226

2,135 

It 237

545

335

407

907

Per 

square 

mile

0.347

.536

.907

1.29

.571

.589

1.27

2.36 

2*26

1.31

 576

.355

.432

.962

Runoff 

in 

inches

0.40

.60

1.05

17.62

.66

.61

1.47

2.64 

2.61

1.46

 67

.41

.48

13.06

* Winter discharge measurement made on this day. 

a No gage-height record; discharge interpolated. 

b Stage-discharge relation affected by ice.
200 YAKIMA RIVER BASIN

Bumping River near Nile, Wash.

Location.- Water-stage recorder, lat. 46°52', long. 121°18', a quarter of a mile downstream from spillway of Bumping Lake Dain and 19 miles west of Nile, Yaklma Comity. 

Drainage area.- 68 square miles.

Records available.- June to July 1906. April 1909 to September 1941. 

Average discharge?- 32 years (1909-41), 287 second-feet (adjusted for storage since

November 1910). * 

Extremes (regulated).- Maximum discharge during year, 666 second-feet Apr. 23 (gage

height, o~38 feet); minimum, 2 second-feet Dec. 31 (gage height, 0.91 foot).

1906,cl909-41: Maximum discharge, 5,180 second-feet Dec. 29, 1917 (gage height,

9.33 feet); practically no flow when gates in outlet conduit are closed. 

Remarks.- Records good except those below 30 second-feet, which are fair. Ho diversion.

Flow regulated by Bumping Lake (see p. 196 ). Record of dally discharge not adjusted

for change in contents of lake. 

Cooperation.- Records collected and prepared in cooperation with the Bureau of Reclamation.

Rating tables, water year 1940-41 (gage height, In feet, and discharge. In second-feet) 

Oct. 1 to Dec. 11 Dec. 12 to Sept. 30

1.4 25 1.8 63 1.0 5 2.0 103 

1.6 40 2.0 100 1.2 14 2.3 176 

Note.- Same as follow- 1.4 25 2.6 275 

Ing table below 1.4 feet. 1.8 66 3.0 450

Discharge, In seeond-f eet , water year October 1940 to September 1941

Day

1 

2 

S 

4 

6

6 

7 

8 

9 

10

11 

12 

13 

14 

16

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

32 

32 

34 

34 

34

33 

32 

32 

33

37

42 

43 

44 

44 

43

43 

44 

44 

43 

44

46 

47 

49 

60 

68

68 

62 

58 

59 

70 

86

Hov.

88 

86 

80 

72 

68

65 

70 

68 

63 

63

62 

60 

60 

58 

55

53 

53 

53 

50 

48

48 

46 

44 

47 

47

45 

47 

54 

30 

10

Month

Oct 

HOT

Dec

Ca.

jam 

Feb 

Man 

Apr 

May 

Jun 

Juli 

Augt 

Sepl

Wa1

.endar year 1940

ter year 1940-41

Dec.

3 

3 

3 

3 

5

6 

5

4 

4 

3

3 

13 

105 

257 

314

314 

294 

236 

160 

95

28 

7 

5 

4 

4

3 

3 

3 

3 

3 

36

Jan.

69 

66 

125 

176 

176

176 

176 

176 

125 

125

125 

125 

125 

125 

125

125 

125 

130 

130 

130

127 

125 

125 

125 

125

127 

127 

127 

127 

127 

127

Feb.

130 

127 

127 

127 

127

127 

127 

125 

125 

125

125 

125 

125 

125 

123

123 

123 

123 

123 

123

123

123 

121 

121 

121

121 

121 

121

Mar.

125 

7 

7 

6 

6

6 

6

7 

7 

8

8 

8 

8 

8 

8

S 

8 

8 

9 

10

10 

10 

10 

10 

10

11 

11 

12 

12 

16 

16

Observed

Discharge In 

eeoond-feet

Maximum

86 

88 

314

956

£S 

125 

638 

401 

314 

314 

149 

59

638

Mlni32 

10 

3

3

66 

121 

6 

17 

356 

314 

149 

63 

40

3

Mean

46.5 

56.4 

62.2

219

130 

124 

12.8 

250 

400 

314 

238 

140 

50.9

152

Runoff 

in 

acre-feet

2,860 

3,360 

3,830

159,200

8,020 

6,900 

785 

14,890 

24,570 

18, 680 

14, 620 

8,610 

3,030

110,200

Apr.

18 

21 

20 

21 

21

21 

20 

20 

20

20

19 

18 

18 

18 

IS

17 

87 

401 

609 

638

638 

63 S 

638 

638 

638

609 

528 

401 

356 

378

May

401 

401 

401 

401 

401

401 

401 

401 

401 

401

401 

401 

401 

401 

401

401 

401 

401 

401 

401

401 

401 

401 

401 

401

401 

401 

401 

401 

401 

356

Change In

contents In 

Bumping Lake 

(acre-feet)

+270 

+2,580 

+7,130

-3,140

-1,370 

-1,630 

+9,230 

+6,210 

+340 

-6,870 

-9,720 

-6,030 

-110

+30

June

314 

314 

314 

314 

314

314 

314 

314 

314 

314

314 

314 

314 

314 

314

314 

314 

314 

314 

314

314 

314 

314 

314 

314

314 

314 

314 

314 

314

July

314 

314 

314 

314 

314

314 

275 

222 

222 

222

219 

222 

222 

222 

222

222 

222 

219 

219 

219

222 

222 

222 

222 

222

222 

222 

219 

219 

197 

149

Aug.

149 

149 

149 

149 

149

147 

147 

149 

149 

149

149 

149 

149 

147 

149

147 

147 

147 

149 

149

147 

147 

149 

147 

144

144 

139 

121 

97 

76 

63

Sept.

58 

55 

52 

50 

46

45 

42 

41 

40 

48

52 

53 

52 

52 

56

59 

59 

59 

59 

59

5S 

55 

52 

52 

50

48 

46 

44 

43 

43

Adjusted for change in 

reservoir contents

Runoff 

In 

acre-feet

3,130 

5,940 

10,960

156,000

6,650 

5,270 

10,020 

21,100 

24,910 

11,810 

4,900 

2,580 

2,920

110,200

Discharge In 

seoond-feet

Per 

Mean square 

mile

50.9 0.749 

99.8 1.47 

178 2.62

215 3.16

108 1.59 

94.9 1.40 

163 2.40 

355 5.22 

405 5.96 

198 2.91 

79.7 1.17 

42.0 .613 

49.1 . .722

152 2.24

Runin 

Inches

0.86 

1.64 

3.02

43.02

1.83 

1.45 

2.76 

5.82 

6.87 

3.26 

1.35 

.71 

.81

30.38
YAKIMA. RIVER BASIN 201

American River near Nile, Wash.

Location.- Water-stage recorder, lat. 46°58'30", long. 121°10'10", In SWi sec. 12, T. 17 

N., R. 13 E., 300 feet upstream from Bumping Lake road crossing, three-quarters of a 

mile upstream from mouth, and 16 miles northwest of Nile. Datum of gage Is 2,700.0 

feet above mean sea level (Washington State Highway Department bench mark).

Drainage area.- 79 square miles.

Records avallable.- April 1909 to September 1911, July 1913 to September 1915 (fragmentary) t October 1939 to September 1941.

Extremes.- Maximum discharge during year, 680 second-feet May 17 (gage height, 74.26 

reet); minimum, 12 second-feet Nov. 22.

1909-11, 1913-15, 1939-41: Maximum discharge observed, 1,580 second-feet June 2, 

1909 (gage height, 4.55 feet, datum then In use), from rating curve extended above 750 

second-feet; minimum discharge, that of Nov. 22, 1940.

Remarks.- Records good except those for periods of Ice effect, which are poor. No 

diversion or regulation.

Cooperation.- Records collected and prepared In cooperation with the Bureau of 

Reclamation.

Discharge, in second feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

41

45

55

49

46

43

43

38

38

41

43

46

48

48

45

43

45

49

46

45

50

53

59

137

137

106

92

81

78

92

103

Nov.

98

90

81

73

60

56

66

70

64

56

53

48

43

38

37

37

36

34

32

32

29

22

27

27

24

22

25

55

225

158

-

Dec.

126

115

110

112

135

142

121

117

108

36

*bllO

b85

b92

b!02

b90

*b73

b!32

b!26

110

119

146

153

144

130

121

115

110

106

102

98

94

Jan.

b94

bS6

b92

b76

b76

86

85

«80

73

71

63

65

64

62

59

56

59

S3

102

88

83

80

74

73

74

70

63

65

65

64

68

Month

October .......................

November ......................

December .....................

Calendar year 1940 .........

January .......................

February ......................

March ......... ...............

April .........................

May ...........................

June ..........................

July ..........................

August ........................

September .....................

Water year 1940-41. .........

Feb.

90

90

85

83

el

80

80

76

76

74

71

68

65

62

59

60

*58

60

60

60

62

62

64

64

64

64

71

98

-

-

-

Secondfoot-days

1,890

1,718

3,535

_ sic

2, 319

5,73s

10,397 

13,027

7 693

2 248

1^264

1,453

53,269

Mar.

139

165

155

153

142

142

148

Apr.

428

482

464

432

411

374

355

155] 336

16W 330

1631 323

163

163

158

153

153

153

177

192

190

180

177

177

177

175

180

197

220

244

272

336

374

Maximum

137

225

158

102

98

374

'482

640

364

123

55

62

640

308

290

284

281

293

284

272

253

252

252

258

284

326

355

367

391

401

414

428

464

May

482

464

425

377

364

326

299

293

284

287

345

520

580

501

442

464

640

560

464

413

401

411

446

501

540

464

404

358

330

311

326

Minimum

38

22

73

22

56

58

139

252

284

130

45 

33

37

22

June

342

336

333

326

333

336

342

302

284

314

343

364

361

314

264

244

231

231

231

220

202

192

197

177

163

151

144

142

139

130

Mean

61.0

57.3

114

*1 QQ

74.8

71.0

185

347

420

256

40.8

48.4

146

July

123

1

1

1

17

10

04

102

Per 

square 

mile

.772

.725

1.44

2.52

.947

.899

2.34

5 . 32

3.24

. 918 

.516

.613

1.85

93

96

36

S3

83

80

74

71

70

68

65

64

64

60

58

55

53

55

58

60

53

49

50

48

46

45

Aug.

43

42

46

46

43

42

39

41

38

37

36

41

39

36

37

37

34

33

38

55

48

42

39

38

38

46

43

45

42

39

41

Sept.

41

46

45

45

42

39

38

37

37

52

56

53

50

50

55

56

56

59

53

62

60

58

55

50

49

46

43

39

38

38

Runoff

Inches Acre feet

.89 3,750

.81 3,410

1.66 7,010

34.27 144,400

19 4 600

 94 -3 940

2.70 11,380

4*89 20, 620

6.13 25,840

3.62 15,260

1.06 4,460

.60 2,510 

.68 2,880

25.07 105,700

* Winter-discharge measurement made on this day.

b Stage-discharge relation affected by ice.

Note.- Shifting-control method used throughout the year.
202 YAKIMA RIVER BASIN

Tieton River at Tieton Dam, near Naches, Wash.

Location.- Water-stage recorder, lat. 46°39 1 30", long. 121°07'20", 900 feet upstream

 from Wild Cat Creek, 1,200 feet downstream from Tieton Dam, 19 miles upstream from

Oak Creek and 22 miles southwest of Naches, Yakima County. 

Drainage area.- 187 square miles. 

Records available.- August 1908 to September 1914 (fragmentary), October 1918 to March

 1919, April 1925 to September 1941, in reports of Geological Survey. September 

1908 to December 1913, July 1914 to September 1920, and May 1925 to September 1933, 

in State Water-Supply Bulletin 5. Average discharge.- 22 years (1908-12, 1918-20, 1925-41), 461 second-feet (adjusted for 

storage since October 1925).

Extremes (regulated).- Maximum discharge during year, 1,820 second-feet July 17 (gage

 Height, &TbO reet); minimum, 7 second-feet Dec. 9-17.

1908-14, 1918-19 (revised), 1925-41: Maximum discharge, 8,450 second-feet Dec. 22, 

1933 (gage height, 9.24 feet); no flow Apr. 4-6, 10, 1930. 

Remarks.- Records good except those for very low flow, which are poor. No diversion.

 Flow regulated by Tieton Reservoir. Record of daily discharge not adjusted for change

in contents of reservoir. 

Cooperation.- Records collected and prepared in cooperation with the Bureau of

Reclamation.

Rating table, water year 1940-41 (gage height, in feet, and discharge, in second-feet)

1.5 10 2.4 88 4.0 695 

1.7 18 2.7 142 4.5 1,020 

1.9 32 3.0 216 5.0 1,400 

2.1 51 3.5 420

Discharge, in aeoond-f eet , water year October 1940 to September 1941

D»y

i 2

3

4 

6

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

26

26 

27 

28 

29 

SO 

51

Oct.

308 

375 

390 

324 

272

295 

320 

324 

342 

361

338 

329 

338 

352 

304

261 

232 

232 

225 

228

232 

235 

228 

235 

232

232 

235 

232 

232 

2S2 

232

Nov.

232 

222 

216 

174 

144

144 

142 

142 

140 

140

142 

118 

104 

104 

104

104 

104 

104 

104 

104

104 

104 

128 

153 

169

181 

181 

181 

181 

119

Month

Octo 

Non 

Deoi

Ca.

Jam 

Peb 

Man 

Apr 

May 

Jun 

Juli 

Augt 

Sep

Ma

Lendar year 19 4O

cer year 1940-41

Dec.

8 

8 

8 

8 

8

8 

8 

8 

7 

7

7 

7 

7 

7 

7

7 

7 

8 

8 

8

9 

9 

9 

9 

9

9 

9 

9 

9 

9 

9

Jan.

9 

9 

9 

9 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10 

10

Peb.

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10

Mar.

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

10 

10

Observed

Discharge in 

second-feet

Haxi390 

232 

9

1,290

10 

10 

10 

5S2 

988 

1,210 

1,780 

851 

695

1,780

Minimum

225 

104 

7

7

9 

10 

10 

9 

316 

420 

793 

604 

473

7

Mean

281 

143 

8.1

384

9.9 

10.0 

10.0 

140 

673 

938 

1,256 

712 

569

398

Runoff 

In 

acre-feet

17,270 

8,510 

496

278,700

607 

555 

615 

S,360 

41, 370 

55,800 

77,220 

43,790 

33, 860

288,500

Apr,

10 

10 

10 

10 

10

10 

10 

10 

10 

10

10 

10 

10 

10 

9

10 

10 

10 

54 

188

SOS 

352 

338 

395 

415

356 

320 

295 

431 

582

May

544 

500 

473 

462 

489

593 

780 

818 

884 

953

988 

851 

500 

484 

672

713 

473 

316 

560 

690

725 

812 

818 

719 

678

707 

731

sie

851 

755 

498

Change in 

contents 

in Tieton 

Reservoir 

(acre-feet)

-10,360 

+1,640 

+17,500

-11,140

+11,020 

+9,020 

+16,930 

+22,770 

-5,890 

-29,290 

-59,890 

-30,530 

-19, 420

-76, 500

June

436 

420 

768 

780 

707

818 

818 

818 

851 

918

918 

755 

774 

851 

988

1,100 

1,100 

1,020 

988 

918

98S 

1,170 

1,210 

1,130 

1,100

1,100 

1,210 

1,210 

1,170 

1,100

July

1,020 

1,020 

1,020 

953 

918

884 

851 

851 

851 

918

884 

793 

818 

1,020 

1,360

1,610 

1,740 

1,780 

1,780 

1,690

1,650 

1,690 

1,690 

1,650 

1,610

1,610 

1,610 

1,440 

1,250 

1,020 

953

Aug.

761 

666 

666 

655 

649

666 

780 

755 

672 

690

684 

661 

649 

731 

786

749 

768 

818 

851 

793

774 

786 

780 

786 

737

644 

604 

604 

610 

610. 

690

Sept.

695 

644 

610 

599 

593

588 

582 

582 

604 

604

593 

571 

554 

576 

604

582 

582 

571 

554 

538

527 

511 

489 

484 

538

604 

554 

527 

538 

473

Adjusted for change in 

reservoir contents

Runoff 

In 

acre feet

6,910 

10,150 

18,000

267,600

11,630 

9,580 

17,540 

31,130 

35,480 

26,510 

17,330 

13,260 

14,440

212,000

Discharge in 

second-feet

Mean

112 

171 

293

369

189 

172 

285 

523 

577 

446 

282 

216 

243

293

Per 

square 

mile

0.599 

.914 

1.57

1.97

1.01 

.920 

1.52 

2. SO 

3.09 

2.39 

1.51 

1.16 

1.30

1.57

Run**

in 

inches

0.69 

1.02 

1.80

26.84

1.17 

.96 

1.76 

3.12 

3.56 

2.66 

1.74 

1.33 

1.45

21.26
YAKIMA RIVER BASIN 

Tleton River at headworks of Tleton Canal, near Naches, Wash.

203

Location.- Water-stage recorder, lat. 46°40'10", long. 121 0 00'20", In sec. 30, T. 14 N., 

 R. 15 E (unsurveyed), Just downstream from Intake of Tleton Canal, 12 miles upstream

from Oak Creek, and 16 miles southwest of Naches. 

Drainage area.- 240 square miles. 

Records available.- April to September 1906 (fragmentary gage-height records), July 1907

to September 1941. 

Average discharge.- 32 years (1907-16, 1918-41), 538 second-feet (adjusted for diversions

since 1910 ana for storage since October 1924). 

Extremes (regulated).- Maximum discharge during year, 1,540 second-feet July 17-20 (gage

height, 47ii9 reet); minimum not determined, probably occurred during period of Ice

effect.

1907-41: Maximum discharge, 8,910 second-feet Dec. 22, 1933 (gage height, 9.70

feet); no flow at times In 1926, 1929, 1931, 1932, 1934. 

Remarks.- Records good except those for periods of Ice effect, which are poor. Diversions

for irrigation by Tleton Canal. Flow regulated by Tleton Reservoir, 7 miles above

gage. Record of dally discharge not adjusted for canal diversion or for change In

contents of Tleton Reservoir. 

Cooperation.- Records collected and prepared In cooperation with the Bureau of

Reclamation.

Rating table, water year 1940-41 except periods of Ice effect (gage height, In feet, 

and discharge, In second-feet)

1.2 6 2.0 S5 2.8 361 3.6 S95 

1.4 13 2.2 132 3.0 470 4.0 1,250 

1.6 26 2.4 193 3.2 596 

l.S 50 2.6 269 3.4 740

Discharge, In second-feet, water year October 1940 to September 1941

Day

1 

2 

3

4 

6

6

7

a

9

10

11

18 

13 

14 

15

16 

17 

18 

19 

SO

21 

22 

23 

24 

26

26 

27 

86

29 

SO 

31

Oct.

304 

356 

371 

323 

282

300 

327 

337 

S47 

361

351 

342 

351 

371 

323

300

253 

245 

237 

233

249 

253 

245 

«269 

261

257 

249 

249 

249 

249 

245

Nov.

245 

241 

233 

193 

167

164 

161 

161 

164 

164

161 

152 

122 

120 

12O

122 

122 

122 

120 

120

120 

122 

. 127 

136 

135

138 

136 

174 

19S 

120

Month

Oct 

ROW 

Deei

Ca.

Jam FebMan 

Apr 

May 

Jvmi 

Jul 

Augi 

Sep

Wa

Lendar year 1940

ter year 1940-41

Dec.

30 

29 

2S 

29 

37

40 

33 

b27 

bll 

*bS

bs 

bS 

b8 

bS 

bS

b9 

b!4 

b20 

b26 

40

55 

68 

52 

40 

37

27 

26 

23 

20 

20 

20

Jan.

blO 

«blO 

blO 

blO 

blO

blO 

blO 

bll 

bll 

b!2

b!3 

b!3 

b!4 

b!5 

b!6

b!7 

18 

20 

24 

23

23 

23 

21 

20 

21

22 

22 

22 

22 

22 

22

Feb.

23 

24 

24 

24 

26

26 

28 

28 

26 

26

26 

26 

26 

26 

28

SO 

SO 

32 

50 

26

*86 

SS 

28 

26 

24

24 

24 

30

Mar.

47 

60 

46 

56 

55

47 

60 

63 

72 

70

63 

60 

55 

47 

47

52 

61 

66 

60 

53

42 

24 

18 

13 

8

9 

9 

10 

15 

28 

30

Observed

Discharge In 

second-feet

Maximum

371 

245 

68

1,030

24 

32 

72 

342 

755 

1.010 

1,540 

544 

424

1,540

Minimm

233 

120 

8

8

10 

23 

8 

26 

49 

127 

500 

300 

295

8

Mean

293 

152 

26.1

271

16.7 

26.6 

43.1 

119 

408 

697 

983 

408 

337

294

Runoff 

In 

acre-feet

16,030 

9,060 

1,600

196,400

1,030 

1,480 

2,650 

7,060 

25,060 

41,450 

60,470 

25,080 

20,070

213,000

Apr.

40 

63 

46 

41 

42

33 

26 

53 

72 

72

74 

68 

66 

63 

64

60 

56 

50 

47 

180

287 

291 

245 

249 

253

215 

152 

114 

193 

342

Change

In

In 

Tleton 

Reservoir 

(acrefeet)

-10,360 

+1,640 

+17,500

-11,140

+11,020 

+9,020 

+16,930 

+22,770 

-5,890 

-28,290 

-59,890 

-30,530 

-19,42C

-76.50C

Hay

323

249 

241 

193 

241

327 

531 

583 

638 

666

755 

631 

282 

200 

377

453 

278 

49 

261 

392

430 

531 

550 

453 

371

413 

453 

531 

564 

442 

825

Diverted 

ty 

Tleton 

Canal 

(acrefeet)

0 

992 

0

98,460

0 

0 

762 

4,300 

17,860 

14,210 

18,170 

18,400 

12,760

87,450

June

149 

127 

470 

513 

430

5S3 

596 

596 

652 

710

703 

525 

531 

610 

718

863 

879 

S15 

755 

696

740 

929 

1,010 

895 

863

871 

938 

954 

912 

863

July

762 

748 

725 

666 

631

610 

570 

570 

583 

624

603 

500 

519 

725 

1,020

1,300 

1,490 

1,540 

1,540 

1,440

1,390 

1,440 

1,490 

1,390 

1,390

1,340 

1,340 

1,200 

963 

710 

666

Aug.

482 

377 

366 

361 

342

351 

488 

453 

361 

366

387 

351 

323 

397 

482

447 

447 

5OO 

544 

494

470 

482 

476 

482 

464

351 

304 

300 

304 

304 

387

Sept.

403 

361 

323

313 

295

300 

295 

300 

323 

337

332 

313 

300 

313 

351

327 

332 

337 

337 

323

313 

313 

309 

313 

371

424

397 

366 

387 

413

Adjusted fcr change In reservoir contents and diversion

Runoff 

In 

acre-feet

7,670 

11,690 

19,100

283,700

12,050 

10,500 

80,340 

34,150 

37,030 

86,370 

18,750 

12,950 

13,410

284,000

Discharge In 

second-feet

?er 

Mean square 

mile

125 0.521 

196 .817 

311 1.30

391 1.63

196 .817 

189 .788 

331 1.38 

574 2.39 

602 2.51 

443 1.85 

305 1.27 

211 .379 

225 .93E

309 1.29

RunIn 

Inches

0.6O

.91 

1.50

22.18

.94 

.82 

1.59 

2.67 

2.89 

2.06 

1.46 

1.01 

1.05

17.50

* Winter-discharge measurement made on this day. 

b Stage-discharge relation affected try Ice.

461678 O-42-14
204 YAKIMA RIVER BASIN

North Fork of Ahtanvun Creek near Tampico, Wash.

Location.- Water-stage recorder, lat. 46°33'40", long. 120°55'10", in NWi sec. 2, T. 12 

N., R. 15 E., 100 feet downstream from Nasty Creek, 3& miles northwest of Tampico and 

mouth of South Fork, and 20 miles west of Yakima.

Drainage area.- 69 square miles.

Records available.- August 1907 to September 1924 (incomplete), March 1931 to September 

1941.

Average discharge.- 16 years (1909-15, 1931-41), 58.0 second-feet.

Extremes.- Maximum discharge during year, 173 second-feet Apr. 1 (gage height, 1.47 feet); 

minimum, 7.9 second-feet Dec. 12-20 (gage height, 0.17 foot).

1907-24, 3931-41: Maximum discharge, 755 second-feet Dec. 22, 1933; maximum gage 

height, 4.6 feet June 18, 1916; minimum discharge, 5.8 second-feet Dec. 24, 1939, but 

may have been less during periods of ice effect.

Remarks.- Records good except those for periods of ice effect, which are poor. No 

a1versions of importance. No regulation.

Cooperation.- Records collected in cooperation with Indian Service.

Rating table, water year 1940-41, except periods of ice effect (gage height, in feet, 

and discharge, in second-feet)

0.3 18 0.9 62 

.5 36 1.1 109 

.7 56 1.4 159

Discharge, in second-feet, water year October 1940 to September

Day

1 

2 

3 

4 

5

6 

7 

8 

9 

10

11 

12 

13 

14 

15

16 

17 

18 

19 

20

21 

22 

23 

24 

25

26 

27 

28 

29 

30 

31

Oct.

13 

15 

15 

15 

14

14 

14 

13 

13 

14

15 

14 

15 

15 

14

13 

14 

13 

13 

13

13 

13 

15 

32 

21

*16 

15 

15 

15 

15 

16

Nov.

15 

15 

14 

12 

13

15 

20 

17 

15

11

15 

15 

15 

b!5 

b!5

b!5 

b!5 

15 

15 

16

15 

13 

16 

15

15

15 

16 

25 

58

30

Dec.

23 

21 

21 

21

30

26 

23 

21

15 

11

10 

8.6 

7.9 

7.9 

7.9

7.9 

7.9 

7.9 

7.9 

8.6

13 

b20 

b20 

b20 

b20

21 

20 

19 

18 

18 

15

Jan.

11 

bll 

b!2 

b!3 

b!4

b!5 

b!5 

b!5 

16 

16

15 

15 

16 

le

17

18 

17 

17 

IS 

18

17 

16 

16 

16

17

16 

15 

15 

15 

15 

15

Feb.

14 

15 

15 

16

17

17 

17 

*18 

16 

19

19 

19 

18 

18 

15

17

le

19 

20 

20

21 

22 

22 

23 

22

22 

24 

33

Month Second- 

"ontn foot-days

Ooto 

Nove 

Dece

Ca

Janu 

Febr 

Hare 

Apri 

May 

June 

July 

Augu 

Sept

Wa

lendar year 194C 

ary

1 3

ember .....................

465 

516 

500.5

690.5

479 

536 

266 

360 

296 

785 

634 

465 

405

ter year 1940-41 .......... 14,711.5

Mar.

68 

73 

66 

62 

61

61 

*63

72 

73 

72

66 

66 

61 

59 

58

62 

73 

83 

79 

73

71 

66 

67 

66 

66

73 

82 

87 

f94 

fll6 

f!21

Maximum

32 

56 

30

216

18 

33 

121 

154 

148 

63 

34 

21 

20

154

Apr.

f!34 

154 

133 

129 

121

112 

109 

106 

116

114

106 

105 

104

105 

107

96 

92 

87 

86 

84

37 

96 

107 

110

114

118 

121 

124 

131 

141

May

148 

138 

124 

115 

108

98 

92 

6V 

83 

64

95

123 

126 

116 

109

107 

124 

107 

96 

94

96 

101 

108 

121 

120

106 

101 

98 

94 

87 

84

June

Minimum Mean

13 15.0 

11 17.2 

7.9 16.1

7.0 46.3

11 15.5 

14 19.2 

58 73.2 

84 112 

83 106 

35 59.5 

15 20.5 

13 15.0 

12 13.5

7.9 40.3

* Winter-discharge measurement made on this day. 

b Stage-discharge relation affected by ice. 

t Computed on basis of partly estimated gage-height record.

S3 

79 

79 

79 

79

62 

76 

73 

69 

69

72 

72 

66 

64 

60

58 

58 

55 

52 

49

47 

44 

42 

46 

44

40 

37 

36 

36 

35

1941

July

34 

30 

29 

27 25'

25 

25 

24 

23 

22

21 

21 

20 

20 

19

17 

17 

17 

19

17

17 

17 

16 

16 

16

18 

17 

17 

16 

15 

15

Per 

square 

mile

0.217 

.249 

.233

.700

.225 

.276 

1.06 

1.62 

1.54 

.662 

.297 

.217 

.196

.564

Aug.

15 

15 

16 

17 

16

15 

14 

15 

15 

14

15 

16 

15 

15 

14

15 

14 

13 

14 

15

15 

14 

13 

13 

15

21 

16 

15 

15 

15 

15

Sept.

15 

20 

16 

15 

14

14 

14 

14 

14 

15

14 

14 

13 

13 

13

13 

13 

12 

12 

13

13 

13 

13 

13 

12

12 

12 

12 

12 

12

Runoff

Inches

0.25 

.26 

.27

9.52

.26 

.29 

1.22 

1.81 

1.78 

.96 

.34 

.25 

.22

7.93

Acre-feet

922

1,020 

993

35,060

950 

1,070 

4,500 

6,660 

6,540 

3,540 

1,260 

922 

803

29,180
YAKIMA. RIVER BASIN 205

South Fork of Ahtanum Creek at Conrad Ranch, near Tamplco, Wash.

Location.- Staff gage, lat. 46°30'30", long. 120°54'50M , In wi sec. 23, T. 12 N., R. 15 

E., at Conrad Ranch, 2i miles upstream from North Fork of creek, 2f miles southwest 

of Tamplco, and 20 miles southwest of Yaklma.

Drainage area.- 24.5 square miles.

Records available.- March 1915 to September 1924 (fragmentary), March 1931 to September

1941.

Extremes.- Maximum discharge observed during year, 34 second-feet Mar. 1 (gage height, 

0.96 root); minimum not determined, probably occurred during period of Ice effect.

1915-24, 1931-41: Maximum discharge observed, 424 second-feet Dec. 23, 1933 

(gage height, 3.10 feet); minimum, 2.6 second-feet Aug. 23, 25, 1931 (gage height, 

0.35 foot).

Remarks.- Records good except those for periods of Ice effect, which are poor, 

read twice dally. A few diversions above station for Irrigation.

Cooperation.- Records collected In cooperation with Indian Service.

Rating tables, water year 1940-41, except periods of Ice effect (gage height, 

In feet, and discharge, In second-feet)

Gage

Oct. 1 to Dec. 20 Dec. 21 to Sept. 30

0.4 2.S 0.4

.5 5.2 .5

.6 8.S .6

.1 14

3.3 0.7 14

5.S .S 20

9.2 .9 29

Discharge, in second-feet, water year October 1940 to September 1941

Day

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Oct.

4.2

4.2

4.9

4-7

4.2

4.2

4.2

4.2

4.2

4.2

4.2

4.2

4.4

4.7

4.2

4.2

4.2

4.2

4.2

4.2

4.2

4.2

4.7

6.5

4.9

*4.7

4.7

4.7

4.9

5.2

4.7

Nov.

4.7

4.V

4.V

4.V

4.7

4.7

5.5

4.9

4.7

4.9

4.9

4.7

4.8

5.0

5.4

5.4

5.3

4.9

4.7

4.7

4.7

4.2

4.2

4.2

4.2

4.2

4.2

4.9

10

6.2

~

Dec.

5.8

5.2

5.2

5.5

7.6

6.5

5.2

5.0

5.0

4.9

4.5

4.3

4.2

4.1

4-0

4-0

4.1

4.3

4.4

4.7

5.0

5.4

5.7

6.0

6.4

6.4

5.8

5.8

5.8

5.8

5.5

Jan.

5.0

4.5

4.4

4.6

5.0

5.0

5.0

5.0

5.0

4.6

4.5

4.6

4.8

5.0

5.2

5.2

6.0

6.4

5.S

5.S

5.2

5.2

5.2

5.5

5.8

5.2

5.2

5.2

5.2

5.2

5.2

Feb.

5.5

5.S

5.S

5.S

6.0

6.7

6.4

*7.0

7.7

7.7

7.7

7.7

7.4

6.7

6.4

7.4

7.7

7.7

7.7

8.4

S.4

8.4

8.4

8.4

8.4

S.8

10

11

-

-

-

Month

October ....................................

November . ..................................

December ...................................

Calendar year 1940 ......................

January. ...................................

February ...................................

March. .....................................

April.... ..................................

Hay

June .......................................

July. ............................'..........

August .....................................

September . .................................

Water year 1940-41 ......................

Mar.

28

29

27

25

24

24

24

24

25

24

22

20

IS

18

18

17

19

20

20

19

18

16

16

16

16

16

16

18

19

22

23

Apr.

Secondfoot-days

139.3

149.0

162.1

4,613.0

159.5

211.0

641

694

690 

331.2

1S4-7

156.7 

140.1

3,653.6

24

29

27

27

24

24

22

24

25

27

25

24

24

23

22

20

20

19

19

18

IS

19

20

22

23

24

24

25

25

27

Hay

29

29

29

27

26

24

22

20

19

19

19

22

24

24

23

24

27

24

22

21

20

20

20

20

22

20

20

20

19

18

17

Maximum

6.5

10

V» 6

45

6.4

11

29 

29

f)Q C.!3

16

8

-1

 J.

8.8 

6.4'

29

June

16

16

15

14

14

14

13

13

12

12

11

11

10

10

10

10

10

10

10

10

10

10

9.6

9.2

9.2

9.2

S.4

S.4

8.1

8.1

Minimum

4.E

4.£

4.C

3

4.4 

5.5

16

IS

17

8 TJ 5 '

4.2 

4.E

4.0

July

S.I

7.7

7.7

7.0

7.0

7.0

6.7

6.7

6.4

6.4

6.4

6.4

5.8

5.S

5.S

5.5

5.5

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

Aug.

4.6

4.6

5.2

5.2

5.2

5.2

4.6

4.6

4.6

4.6

4.2

4.6

4.6

4.6

4.4

4.2

4.2

4.2

S.8

6.7

5.2

4.6

4.6

4.4

6.0

6.4

5.8

5.2

5.2

5.2

5.2

Sept.

5.8

6.4

5.2

5.2

4.6

4.6

4.4

4.4

4.4

4.4

4.4

4.4

4.6

4.6

4.6

4.6

4.6

4.6

4.6

5.2

4.9

4.6

4.6

4.6

4.4

4.2

4.2

4.2

4.4

4.4

y«an Runoff in Mean acre-feet

4.49 276

4.97 296

5.23 322

18*6 9,160

5*15 316

7^54 " 419

20 V 1 2*70

23*1 ly 380

11 !o *657

5*96 366

5.05 311 

4.67 278

10. 0 7,260

* Winter discharge measurement made on this day.

Note.- Stage-discharge relation affected by ice, Nov. 13-17, Dec- 8-24, Jan. 1-14.
206 MISCELLANEOUS DISCHARGE MEASUREMENTS

In addition to the records of stream flow obtained at gaging stations and reported in 

the preceding pages, measurements of flow were made also at the points in the Pacific 

slope basins in Washington and upper Columbia River Basin indicated in the following 

table:

Miscellaneous discharge measurements in Pacific slope basins In Washington and upper Columbia 

River Basin during water year October 1940 to September 1941

HcAHletef C*eeK Basin, Wash,

Date

Aug. 26

Stream

McAlllster Creek.

Tributary 

diverting

to 01 

fromPuget Sound. .......

Locality

Hj sec. 18, T. 18 H., R. 1 

first road bridge below 

Springs, near Hlsqually.

E., at 

McAlllster

Discharge 

(sec. -ft.)

77.0

Chambers Creek Basin, Wash.

Oct. 9

May 23

29

26

Sept. 9 

Oct. 9

Oct. 9

OQ

Oct. 9

Oct. 9

Glover Creek. ....

do

....do. ..........

....do...........

....do.. .........

....do. ..........

Morey Creek. .....

Stellacoom Lake. . . .

....do. ............

....do.... .........

....do.............

....do. ............

Clover Creek. ......

SEi sec. 7, T. 19 N., R. 3 E., just 

below Spanaway Creek at east edge 

of McChord Field, near Parkland.

do

above Morey Creek In McChord Field, 

near Parkland.

west edge of McChord Field, near 

Fort Lewis.

. . . .do. ..............................

SEi sec. 11, T. 19 H., R. 2 S. , at 

crossing of TJ. S. Highway 99, near 

Fort Lewis.

OT£ sec. 11, T. 19 N., R. £ E., at 

lower end of Dwlght Orr property, 

near Fort Lewis.

KYfi see. 11, T. 19 N., R. 2 E., at 

crossing of Gravelly Lake road, 

near Fort Lewis.

NEi sec. 18, T. 19 N. , R. 3 E. , at 

mouth, in McChord Field, near Fort 

Lewis.

2 12

30 2

OT7 "I

12 3

2 04

32 9

.30

.33

.78 

2.34

1.69

0

.93

1.68
MISCELLANEOUS DISCHARGE MEASUREMENTS 207

Miscellaneous discharge measurements In Pacific slope basins In Washington and upper 

River Basin during water year October 1940 to September 1941--Continued

Chambers Creek Basin, Wash. Continued

Date

HOT. 18

Sent. 9

Stream

Morey Creek. .....

....do...........

Tributary to or 

diverting fromC lover Creek. ......

....do.............

Locality

HEi sec. 18, T. 19 H., R. 3 E., at 

mouth, In McChord Field, near Port 

Lewis.

....do.... ...........................

Discharge 

(sec. -ft.)

1.96

o QO

.79

Lake Washington Basin, Wash.

Hov. 8

Sept. 15

Rock Creek. ......

....do...........

Cedar River. .......

....do. ............

Landsberg-Issaquah road culvert near 

Landsberg.

mouth, near Reimond.

....do. ..............................

25.0

35.4

Skaglt River Basin, Wash.

Dec. 2

Day

do...........

county road bridge, near Lyman.

273

Kootenal River Basin, British Columbia

Hov. 12

Hov. 13

July 19

Kootenal River. . .

Slocan River. ....

....do...........

Columbia River.....

KootenaJ River.....

....do.............

Groham Harrows, 2 miles below Nelson, 

British Columbia; measurements referred to gage No. 10 at Kelson; 

(8 N. J. 9 of Dominion Water and 

Power Bureau, Department of Mines 

and Resources, Canada).

J. 1 of Dominion Water and Power 

Bureau, Department of Mines and Resources, Canada).

Near Crescent Valley, British Columbia (station 8 H. J. 13 of Dominion Water and Power Bureau, Department of Mines and Resources).

. . . .do. ..............................

9,000

1,150

2,740

Pend Orellle River Basin, Mont..

Oct. 

Mar.

May

21 

20

 ?*>

Flint Creek. ..... 

Trout Creek. .....

Blackfoot Riven

Bltterroot R Iven

Clark Pork. ........ 

Flint Creek. .......

SWi see. 15, T. 

NWf sec. 19, T. 

Flint Creek C 

....(t). .......

reservoir.

9 H.,

5 N.,

R. 

R.

13 

14

W. ....... 

W. above

74 

4

5 

2

t For corrections of miscellaneous measurements made on North Pork of Blackfoot River during 

1939-40, see table on page 209.
208 MISCELLANEOUS DISCHARGE MEASUREMENTS

Miscellaneous discharge 

River Basin dx

measurements in Pacific slope basins In Washington and upper 

ring water year October 1940 to September 1941 Continued

Fend Orellle River Basin, Mont.--Continued

Date

Oct. 8

Oct. 8

May 22

28

Stream

Bltterroot 

River.

Bitterroot River.

....do...........

Overwhieh Creek. .

Creek.

....do...........

Tributary to or 

diverting from-

....do.............

....do. ............

West Pork of 

Bltterroot River.

....do.............

Locality

reservoir.

Conner.

SW^NEi sec. 11, T.' 4 N., R. 21 W. at 

Charlos siding.

NWi sec. 25, T. 6 N. , R. 21 W. , at 

Hamilton.

SEi sec. 10, T. 2 S., R. 22 W., above 

sawmill diversion.

Little Blue Joint Creek.

county road.

reservoir.

....do...............................

Discharge 

(aec.-ft.)

244

504

575

73.9

122

25.3

2.2

JCettle River Basin, Wash.

NW^

f< et above mouth, near Laurler.

Spokane River Basin, Idaho

Oct. 7

7

6

Coeur d'Alene

River.

....do. ..........

North Porjc of

Coeur d'Alene

River.

Coeur d'Alene Lake.

....do.............

Coeur d'Alene

River.

1,000 feet above Lost Creek, 5 miles

north of Prlohard, In NEj sec. 9,

T. 50 N. f R. 4 E., near Lost Creek

dam site.

800 feet above Brown Creek, near

Prlchard, In NEi sec. 23, T. 50 N.,

R. 3 E., about lj miles below Leland Glen dam site.

Near Enavllle, Idaho, 300 feet above

mouth, In NW-^ sec. 8, T. 49 N., R.

2 E.

112

154

43.7

Okanogan River Basin, Wash.

Oct. 21

Sept. 22

Palmer Creek. ....

....do. ..........

Slmllkameen River..

. ...do.. ...........

NE£ sec. 35, T. 40 N., R. 25 E. , at 

bridge lj miles above mouth, near 

Nlghthawk.

... .do...............................

a22.8

b67.9

a Plow away from river, 

b Plow toward river.

Methow River Basin, Wash.

May 4

Oct. 17

A'jff. 15

Beaver Creek. ....

Methow Valley 

Irrigation district canal.

....do. ..........

Methow River. ......

Left side of Methow 

Rlv er.

River.

....do........'.....

NEi sec. 26, T. 34 N. , R. 22 E., at 

bridge on property of W. E. Burns, 

near T ~sp.

Just above point opposite gage on 

Methow River at Twlsp.

... .do. ..............................

124

13 4

21.6

72 9

35.2
MISCELLANEOUS DISCHARGE MEASUREMENTS 209

Hlscellaneotta discharge measurements In Pacific slope basins in Washington and upper 

River Basin during water year October 1940 to September 1941 Continued

Hethow River Basin, Wash.--Contlnued

Bate

Sept. 24 

Oct. 16

Sept. 24

Stream

Bethow Valley 

irrigation district canal. 

Rlsley ditch.....

....do...... .....

Tributary to or 

diverting fromRlght side of Twlsp 

River.

....do... ..........

....do.......... ...

Locality

Road crossing 'k mile west of Twlsp... 

Above all diversions, in Twlsp. ......

....do........ .......................

Discharge 

(sec. -ft.)

8.09 

27.0

SI. 4

Yakiiaa River Basin, Wash.

Oct. 26

Sept. 20

Union Gap Canal. .

....do...........

Left Side of Yaklma 

River.

....do.............

Entrance to Union 

east of town of

....do...........

Gap, 1 mile southUnion Gap.

0

26.2

Corrected miscellaneous discharge measurements for the water-year October 1939 to September 

1940, superseding those published in Water-Supply Paper 902, are given herein:

Pend Oreille River Basin, Bont.

Date

Sept. 18

July 14 

Sept. 18

Stream

North Pork of 

Blackfoot 

- River. 

....do........... 

....do...........

Tributary to or 

diverting fromBlackfoot River....

....do......... .... 

....do. ............

Locality

NWj sec. 14, T. 15 N., R. 11 W.......

NWj sec. 10, T. 14 N., R. 12 W....... 

....do..... ..........................

Discharge 

(sec. -ft. )

44.9

200 

124
INDEX

Page 

Aberdeen, Wash. , Wynoochee River

near............................ 17

Accuracy of field data and computed

results......................... 3-4

Acre-foot, definition of.............. 1

Agencies other than Geological Surrey,

records collected by............ 9

Ahtanum Creek, North Fork of, near

Tamploo, Wash................... 204

South Fork of, at Conrad Ranch,

near Tamplco, Wash.............. 205

Alder, Wash., Little Nlsqually River

near............................ 30

Nlsqually River near................ 29

American River near Nile, Wash........ SOI

Arlington, Wash., Jim Creek near...... 60

North Pork of Stlllaguamlsh River

near............................ 61

South Pork of Stillaguamlsh River

near............................ 59

Ashley Creek near Kallspell, Mont..... 154

Auburn, Wash., Green River near....... 44

Bear Creek (Lake Washington Basin), 

Wash., discharge measurements 

of............................. 207

Bear Creek (Fend Orellle River Basin),

near Victor, Mont.............. 135

Beaver Creek near Newhalem, Wash...... 68-69

Beaver Creek, Wash., discharge

measurements of................ 208

Bellingham, Wash., Whatcom Creek near. 77 

Belton, Mont., Middle Pork of Plathead

River near..................... 149

Big Fork, Mont., Swan River near...... 156

Blrchbank, British Columbia,

Columbia River at.............. 81

Bitterroot River, Mont., discharge

measurements of................ 208

East Fork of, at Conner, Mont....... 132

near Darby, Mont.................... 131

West Fork of, discharge measurements

of.............................207-208

near Conner, Mont................. 13Q

Bitterroot River Reservoir, Mont.,

West Fork of, contents of...... 117

Black Diamond, Wash., Green River near 43 

Blaokfoot River near Bonner, Mont..... 128

near Helmvllle, Mont................ 126

near Ovando, Mont................... 127

North Fork of, discharge measurements of ....................... 209

Blodgett Creek near Hamilton, Mont.,.. 133 

Blue Joint Creek, Mont., discharge

measurements of................ 208

Bonner, Mont., Blaokfoot River near... 128 

Bonners Ferry, Idaho, Kootenal River

at............................. 93-94

Kootenal River near................92,95,96

Bothell, Wash,, Sammamlsh River at.... 49

Boulder Creek (Kootenal River Basin)

near Leonla, Idaho.,........... 102

Boulder Creek (Pend Oreille River

Basin) at Marville, Mont....... 123

Boundary Creek near Port Hill, Idaho .. 108

Brlnnon, Wash., Dosewallips River near 25

Duckabush River near................ 26

Buckley, Wash,, White River near...... 40

Bumping Lake, Wash., contents of...... 196

Bumping River near Nile, Wash......... 200

Burnt Fork Greek near Stevensvllle,

Mont........................... 136

Calder, Idaho, St. Joe Hirer at,....., 172

Camas Reservoirs, Mont.,contents of... 117

Carbon River near Fairfax, Wash....... 58

Cascade River at Marblemount, Wash.... 73

Cataldo, Idaho, Coeur d'Alene River

near........................... 167

Cedar River at Cedar Falls, Wash...... 45

near Landsberg, Wash................ 46

Page 

Central la, Wash., Skookumchuok

River near. ...................... 15

Chambers Creek Basin, Wash. , discharge

measurements in... .............. 206-207

Chehalis River near Doty, Wash, ........ 13

near Grand Mound, Wash ............... 14

Chehalis River Basin, Wash.,

gaging-station records In,.....,, 13-17

Chelan, Wash., Cbelan River at..,.,..,. 183 

Lake Chelan at ....................... 182

Chelan River at Chelan, Wash...,,,..... 183

Chelan River Basin, Wash., gaglngstatlon records In. ............ .181-184

189 

109 

Ill 

110 

113 

112 

192 

196 

198

Chlwawa River near Plain, Wash. ........

Clark Fork above Mlssoula, Mont........

at St. Regls, Mont. ..................

below Mlssoula, Mont .................

near Heron, Mont. ....................

near Plains , Mont. ...................

Cle Elum, wash., Yaklma River at.,...,, 

Cle Elum Lake, Wash., contents of......

Cle Elum River near Roslyn, Wash.......

Clearwater, Wash., Clearwater River

near.............................

Queets River near. ...................

Clearwater River near Clearwater, Wash. 

Clover Creek, Wash., discharge

measurements of ..................

Coeur d'Alene, Idaho, Coeur d'Alene

Lake at..........................

Coeur d'Alene Lake at Coeur d'Alene,

Idaho ............................

Coeur d'Alene River at Enaville, Idaho.

20

19

20

206

168

168

166

discharge measurements of ............ 208

near Cataldo, Idaho.. ................ 167

North Fork of, discharge measurement of SOS 

Columbia Falls, Mont., Flathead River

at ............................... 139

Flathead River near,.........,...,.., 138

South Fork of Flathead River near.... 150

Columbia River at Birohbank, British

Columbia. ........................ 81

at Grand Coulee, Wash............87, pl.l,B

at International boundary............ 82

at Kettle Falls, Wash...............

at Trinidad, Wash.....,......,,,.,... 88

Columbia River main stem, WashingtonBritish Columbia, gaging-station 

records on...................... 81-88

Columbia River Reservoir at Grand

Coulee Dam, Wash................. 84-86

Colville, Wash., Mill Creek near....... 165

Colvllle River at Kettle Falls, Wash.., 164 

Colville River Basin, Wash., gagingstatlon records in.............164-165

Oomo Lake, Mont., contents of.......... 117

Computations, accuracy of results of... 3-4 

Concrete, Wash,, Skagit River near..... 65

Conner, Mont., East Fork of

Bitterroot River at...,....,.,,. 132

West Fork of Bitterroot River near... 130 

Control, definition of................. 1

Coolin, Idaho, Priest Lake near........ 156

Priest River near.,.................. 157

Cooperation, record of................. 10

Copeland, Idaho, Kootenal River near... 97-98 

Corvallis, Mont., Willow Creek near..., 134

Darby, Mont., Bitterroot River near.... 131

Darrlngton, Wash., Saulr River near..... 74

Data, accuracy of...................... 3-4

explanation of....................... 1-3

Day Creek, Wash., discharge

measurements of................. 207

Deep Creek (Kettle River Basin) * Wash. ,

discharge measurement of........ 208

Deep Creek (Kootenal River Basin) at

Moravia, Idaho.....,,.........., 105

Doming, Wash., Nooksack River at....... 79

Dlablo Reservoir, Wash,, contents of... 67 

Dosewallips River near Brlnnon, Wash,.. 25

211
212 INDEX

Doaewallips Rlvsr Basin, Wash.,

gaglng-statIon records in.......

Doty, Wash., Ohehalis River near..,,,. 

Duekabush River near Bfinnon, Wash..., 

Duekabush River Basin, Wash,, gagingstation records In..............

Dungeness River Basin, Wash., gagingstation records In,.,......,,..,

Dungeness River near Sequlm, Wash.....

Duwamish River Basin, Wash., gagingstation records in,............

Easton, Wash., Kaohess River near..,, 

Eastport, Idaho, Moyle River at......

Elleen, Idaho, Moyle River at...,..., 

Elwha River at McDonald Bridge, near

Port Angeles, Wash..,,.,,,.,... 

Elwha River Basin, Wash., gaging 

station records in.............

Enavllle, Idaho, Coeur d'Alene River

at ............................

Essex, Mont., Middle Fork of Flathead

River at.......................

Fairfax, Wash., Carbon River near....

Pairholm, Wash., Soleduek River near. 

Ferry, Wash., Kettle River near.,.,., 

Finn, Mont., Nevada Greek near.......

Flathead Lake at Poison, Mont........

at Somers, Mont....................

Flathead, Britlah Columbia, Flathead 

River at..............,.......,

Flathead River at Columbia Falls,

Mont,.....,.,.,.,....,...,,,..,

at Demon Ranch, near Kalispell,

Mont...........................

at Demersvllle, near Kalispell,

Mont...........................

at Flathead, British Columbia,,.,.,

at Therrlault Ferry, near Kalispell,

Mont..,.,......................

Middle Fork of, at Essex, Mont..,., 

near Belton, Mont................

near Columbia Falls, Mont..........

near Holt, Mont,...,,.......,.....,

near Kalispell, Mont...............

near Poison, Mont..................

South Fork of, near Columbia Falls, 

Mont...........................

Flint Creek at Maxvllle, Mont........

discharge measurements of........,,

near Fhllipsburg, Mont.............

near Southern Cross, Mont..........

Floods, special reports on...........

Georgetown Lake, Mont.,contents of... 

Glacier, Wash., Nooksaek River near.. 

Gold Bar, Wash., Skykomish River near 

Grand Coulee, Wash., Columbia River

at..........................87,

Grand Coulee Dam, Wash., Columbia

River Reservoir at.............

Grand Mound, Wash., Chehalis River

near...........................

Granite Creek near Libby, Mont.......

Granite Falls, Wash., South Fork of

Stillaguamish River near.......

Green River near Auburn, Wash........

near Black Diamond, Wash...........

near Palmer, Wash..................

Greenwater, Wash., Oreenwater River

at,.............,.,..,,....,.,,

White River at.....................

Greenwater River at Greenwater, Wash.

Hamilton, Mont., Blodgett Creek near. 

Eayden Lake at Hayden Lake, Idaho.... 

Helmvllle, Mont,, Blackfoot River

near...........................

Heron, Kont., Clark Fork near........

Hoh River near Spruce, Wash..........

Hoh River Basin, Wash., gagingstation record in..............

Holt, Mont,, Flathead River near.....

Hoodsport, Wash., North Fork of

Skokomish River near...........

Hope, British Columbia, Skagit River

near...........................

Hope, Idaho, Fend Oreille Lake at.,..

Page

25

15

26

26

24

34

43-44

197

103

104

25

23

166

148

38

33

161

129

146

145

137

139

143

141

137

143

148

149

138

144

140

147

150 

ISO 

207 

119 

118

117

78

51

P1.1.J 

84-86

14

101

58

44

43

42

41

39

41

133

174

126

113

21

21

144

27

63

114

Icicle Creek above Snow Creek, near

Leavenworth, Wash...............

Cnfrex, Wash., South Fork of Skykomish 

River near......................

Troublesome Creek near..............

Jim Creek near Arlington, Wash.

Page 

190

50

53

60

Kaohess Lake, Wash., contents of....... 196

Kachess River near Easton, Wash........ 197

Kalispell, Mont., Ashley Creek near.... 154

Flathead River near.........140,141,143,143

Whltefish Creek near................. 153

Keechelus Lake, Wash., contents of..... 196

Kettle Falls, Wash., Columbia River at. 83 

Colvllle River at.................... 164

Kettle River near Ferry, Wash.......... 161

near Laurier, Wash................... 163

Kettle River Basin, Washington-British 

Columbia, discharge measurement 

in............................... 308

gaging-station records in...........161-163

Kiona, Wash., Yaklma River at.......... 195

Kootenal River at Bonners Ferry, Idaho. 93-94 

at Boom Camp, near Banners Ferry,

Idaho............................ 93

at Klockmann Ranch, near Bonners

Ferry, Idaho..................... 96

at Leonia, Idaho..................... 91

at Libby, Mont....................... 90

at Newgate, British Columbia......... 89

at Port Hill, Idaho..................99-100

near Bonners Ferry, Idaho............ 95

near Copeland, Idaho................. 97-98

Kootenai River Basin, British ColumblaIdaho-Montana, discharge measurements in......................... 307

gaging-station records in............89-108

La Orande, Wash., Mashel River near.... 31

lake Chelan at Chelan, Wash............ 182

Lake Shannon, Wash., contents of....... 67

Lake Washington Basin, Wash., discharge

measurements in.................. 307

gaging-station records in............ 45-49

Landsberg, Wash., Cedar River near..... 46

Laurier, Wash., Kettle River near...... 162

Leavenworth, Wash., Icicle Creek near.. 190 

Leonia, Idaho, Boulder Creek near...... 103

Kootenal River at.................... 91

Libby, Mont., Granite Creek near....... 101

Kootenai River at.................... 90

Little Boulder Creek, Mont., discharge

measurements of.................. 308

Little Nlsqually River near Alder,

Wash............................. 30

Logan Creek at Tally Lake, near Whitefish, Mont....................... 153

Long Canyon Creek near Port Hill, Idaho 106 

Long Lake, Wash., Spokane River at..... 171

Lower Jocko Lake, Mont., contents of... 117 

Lotus, Idaho, St. Maries River at...... 173

Lucerne, Wash., Railroad Creek at...... 184

McAllister Creek,. Wash., discharge

measurement of................... 206

McAllister Creek Basin, Wash., discharge measurement in............ 206

Mans ford, Wash., Sulattle River near... 76 

Marblemount, Wash., Cascade River at... 73 

Marshall Creek near Phillpsburg, Mont.. 122 

Martin, Wash., Yakima River near....... 191

Mashel River near La Grande, Wash...... 31

Maxville, Mont., Boulder Creek at...... 123

Flint Creek at....................... 120

Metaline Falls, Wash., Fend Oreille

River near....................... 116

Methow River at Twlsp, Wash............ 180

Methow River Basin, Wash., discharge

measurements In.................208-209

gaging-station record in............. 180

Methow Valley Irrigation District

canal, Wash., discharge measurements of........................208-209

Mill Creek near Colville, Wash......... 165

Mission Valley Reservoirs, Mont., contents of......................... 117

Missoula, Mont., Clark Fork above...... 109

Clark Fork below..................... 110
INDEX 333

Moravia, Idaho, Deep Creek at..........

Morey Creek, Wash., discharge measurements of.........................

Kount Vernon, Wash., Skaglt River near.

Moyie River at Eastport, Idaho.........

at Elleen, Idaho.....................

Myers Creek near Hyncaster, British

Columbia.........................

Myncaster, British Columbia, Myers

Creek near.......................

Page 

105

207

103

104

163

163

Naches, Wash., Naches River near....... 199

Tieton River near...................202,203

Naches River below Tieton River, near

Naches, Wash..................... 199

Naselle River near Naselle, Wash....... 11

Naselle River Basin, Wash., gaglngstatlon record In................ 11

Nevada Creek above reservoir, near

Finn, Mont....................... 129

Nevada Creek Reservoir, Mont., contents

of............................... 117

Newgate, British Columbia, Kootenal

River at......................... 89

Newhalem, Wash., Beaver Creek near..... 68-69

Ruby Creek near...................... 70

Skaglt River at...................... 64

Skaglt River near.................... 63

Stetattle Creek near................. 72

Thunder Creek near................... 71

Nlghthawk, Wash., Similkameen River

near............................. 179

Nile, Wash., American River near....... 201

Bumping River near................... 200

Nlsqually River near Alder, Wash....... 29

Nlsqually River Basin, Wash., gaglngstatlon records in............... 29-31

Nooksack River above Cascade Creek,

near Glacier, Wash............... 78

at Doming, Wash...................... 79

South Fork of, near Wlckersham, Wash. 80 

Nooksack River Basin, Wash., gaglngstatlon records In............... 78-80

North River near Raymond, Wash......... 12

North River Basin, Wash., gaglngstatlon records In............... 12

Northport, Wash., Sheep Creek near..... 160

Okanagan Falls, British Columbia,

Okanogan River at................ 176

Okanogan River at Okanagan Falls,

British Columbia................. 176

near Tonasket, Wash.................. 178

Okanogan River Basin, WashingtonBritish Columbia, discharge 

measurements In.................. 208

gaglng-statlon records In...........176-179

Orovllle, Wash., Osoyoos Lake near..... 177

Ortlng, Wash., Puyallup River near..... 32-35

Osoyoos Lake near Orovllle, Wash....... 177

Ovando, Mont., Blackfoot River near.... 127

Overwhlch Creek, Mont., discharge

measurements of.................. 208

Palmer, Wash., Green River near........ 42

Palmer Creek, Wash., discharge measurements of......................... 208

Parker, Wash., Yaklma River near....... 194

Fend Orellle Lake at Hope, Idaho....... 114

Pend Orellle River at Priest River,

Idaho............................ 115

below Z Canyon, near Metaline Falls,

Wash............................. 116

Pend Orellle River Basin, Idaho-Mont.,

discharge measurements In.......207-209

gaglng-statlon records In...........109-159

smaller reservoirs In................ 117

Peshastln, Wash., Wenatchee River at... 188 

Phlllpsburg, Mont., East Fork of Rock

Creek near....................... 125

Flint Creek near..................... 119

Marshall Creek near.................. 122

Middle Fork of Rock Creek near....... 124

Trout Creek near..................... 121

Plain, Waah., Chlwawa River near....... 189

Wenatchee Lake near.................. 185

Wenatchee River at................... 187

Plains, Mont., Clark Fork near......... 112

Poison, Mont., Flathead Lake at........

Flathead River near..................

Port Angeles, Wash., Elwha River near.. 

Port Hill, Idaho, Boundary Creek near.

Page

146

147

23

108

Kootenal River at....................99-100

Long Canyon Creek near............... 106

Smith Creek near..................... 107

Post Falls, Idaho, Spokane River at.... 169

Spokane Valley Farms Co.'s canal at.. 175 

Priest Lake at outlet, near Coolln,

Idaho............................ 156

Priest River, Idaho, Pend Orellle River

at............................... 115

Priest River near.................... 158

Priest River at outlet of Priest Lake,

near Coolln, Idaho............... 157

near Priest River, Idaho............. 158

Publications on stream flow, by

Geological Survey................ 4-7,9

by State agencies................... 8

Puyallup River at Puyallup, Wash.

..........................56-37, pi.1,A

near Ortlng, Wash.................... 32-3?

Puyallup River Basin, Wash., gaglngstatlon records In............... 32-41

Queets River near Clearwater, Wash..... 19

Queets River Basin, Wash., gaglngstatlon records la............... 19-20

Qulllayute River Basin, Wash., gaglngstatlon record In................ 22

Qulnault River at Qulnault Lake, Wash.. 18

Qulnault River Basin, Wash., gaglngstatlon record In................ 18

Railroad Creek at Lucerne, Wash........ 184

Raymond, Wash., North River near....... 12

Redmond, Wash., Sammamlsh Lake near.... 47

Sammamish River near................. 48

Rlsley ditch, Wash., discharge measurements of......................... 209

Rock Creek (Lake Washington Basin),

Wash., discharge measurements of. 207 

Rock Creak (Pend Orellle River Basin), 

East Fork of, near Phillpsburg, 

Mont............................. 125

Middle Fork of, near Phillpsburg,

Mont............................. 124

Rock Creek Reservoir, Mont., East Fork

of, contents of.................. 117

Roslyn, Wash., Cle Elum River near..... 198

Ruby Creek near Newhalem, Wash......... 70

Ruby Reservoir, Wash., contents of..... 67

Runoff In Inches, definition of........ 1

St. Joe River at Calder, Idaho......... 172

BV. Maries River at Lotus, Idaho....... 173

St. Regls, Mont., Clark Fork at........ Ill

Salmon River near Waneta, British

Columbia......................... 159

Sammamlsh Lake near Redmond, Wash...... 47

Sammamlsh River at Bothell, Wash....... 49

near Redmond, Wash................... 48

Satsop River near Satsop, Wash......... 16

Sauk River above Whltechuck River, near

Darrlngton, Wash................. 74

near Sauk, Wash...................... 75

Second-feet per square mile, definition

of...........................-". 1

Second-foot, definition of............. 1

Second-foot-day, definition of......... 1

Sequlm, Wash., Dungeness River near.... 24

Sheep Creek near Northnort, Wash....... 160

Sheep Creek Basin, Wash., gaglngstatlon record In................ 160

Similkameen River near Nlghthawk, Wash. 179 

Skaglt River above Devils Creek, near

Newhalem, Wash................... 63

at Newhalem, Wash.................... 64

near Concrete, Wash.................. 65

near Hope, British Columbia.......... 62

near Mount Vernon, Wash.............. 66

Skaglt River Basin, British ColumbiaWashington, discharge measurements In......................... 207

gaglng-statlon records In............ 62-76

reservoirs In. ............. » 67

Skokomlsh River, North Fork of, below 

Staircase Rapids, near Hoodsport, 

Wash............................. 2V
214 INDEX

Page 

Skokomish River, South Fork of, near

Union, Wash...................... 28

Skokomish River Basin, Wash., gagingstatlon records in............... 27-28

Skookumchuck River near Centralla,

Wash............................. 15

Skykomlsh River near Gold Bar, Wash.... 51

South Fork of, near Index, Wash...... 50

Slate Creek, Mont., discharge measurements of......................... 208

Slocan River, British Columbia, discharge measurements of........... 207

Smith Creek near Port Hill, Idaho...... 107

Snohomlsh River at Snohomish, Wash..... 52

Snohomish River Basin, Wash', gaglngstation records In............... 50-57

Snoqualmle Palls, Snoqualmle River near 56 

Snoqualmie River near Tolt, Wash....... 55

North Fork of, near Snoqualmle Palls,

Wash............................. 56

Soleduok River near Falrholm, Wash..... 22

Somers, Mont., "Flathead Lake at........ 145

Southern Cross, Mont., Flint Creek near 118 

Spokane, Wash., Spokane River at....... 170

Spokane River at Long Lake, Wash....... 171

at Post Falls, Idaho................. 169

at Spokane, Wash..................... 170

Spokane River Basin, Idaho-Wash., discharge measurements In........... 208

gaging-station records In...........166-176

Sookane Valley Farms Co. 's canal at

Post Falls, Idaho................ 175

Spruce, Wash., Hob River near.......... 21

Stage-discharge relation, definition of 1 

Startup, Wash., Sultan River near...... 54

Stehekin River at Stehekin, Wash....... 181

Stetattle Creek near Neirhalem, Wash.... 7S

Stevenavllle, Mont., Burnt Pork Creek

near............................. 136

Stlllaguamish River, North Fork of,

near Arlington, Wash............. 61

South Pork of, above Jim Creek, near

Arlington, Wash.................. 59

near Granite Palls, Wash........... 58

Stlllaguamish River Basin, Wash.,

gaging-atatIon records in........ 58-61

Stlllwater River near Whltefish, Mont.. 161 

Suiattle River near Mansford, Wash..... 76

Sultan River near Startup, Wash........ 54

Swan River near Big Fork, Mont......... 166

Tampico, Wash., North Pork of Ahtanum

Creek near....................... 204

South Pork of Ahtanum Creek near..... 305

Terms, definition of................... 1

Thompson Falls Reservoir, Mont., contents Of......................... 117

Thunder Creek near Newhalem, Wash...... 71

Tieton Reservoir, Wash., contents of... 196

Tieton River at headworks of Tieton

Canal, near Naches, Wash........

at Tieton Dam, near Baches, Wash*... 

Tolt, Wash., Snoqualmle River near....

Tolt River near.....................

Tolt River near Tolt, Wash............

Tonasket, Wash., Okanogan River near.. 

Trinidad, Wash., Columbia River at....

Troublesome Creek near Index, Wash....

Trout Creek, Mont., discharge measurement of.........................

Trout Creek near Phlllpsburg, Mont....

Twisp, Wash., Methow River at.........

Umtanum, Wash., Takima River at.......

Union Gap canal. Wash., discharge

measurements of.................

Union, Wash. , South Fork of Skokomish

River near......................

Page

203

202

55

67

57

178

88

53

207

181

180

193

209

28

Victor, Mont., Bear Creek near. 136

Waneta, British Columbia, Salmon River

near............................. 159

Wenatehee Lake, Wash., Wenatehee River

below............................ 186

Wenatchee Lake near Plain, Wash........ 186

Wenatehee River at Peshastln, Wash..... 188

at Plain, Wash....................... 187

below Wenatchee Lake, Wash........... 186

Wenatehee River Basin, Wash., gaglngtatlon records In..............185-190

Whatcom Creek near Bellingham, Wash. 

Whatcom Creek Baain, Wash., gagingstatlon record In................

White River at Qreenwater, Wash........

near Buckley, Wash...................

Whltefish, Mont., Logan Creek near.....

Stlllwater River near................

Whiteflsh Creek near Kallspell, Mont... 

Wlckersham, Wash., South Pork of Nooksack River near..................

Willow Creek at Anflnson Ranch, near

Corvallls, Mont..................

Work, division of......................

scope of.............................

Wynoochee River at Oxbow, near Aberdeen, Wash.......................

77

77

39

40

152

151

153

80

154

10

1

17

Yaklma River at Cle Elum, IVash.

at Klona, Wash....................

at Umtanum, Wash..................

near Martin, Wash.................

near Parker, Wash.................

Yaklma River Basin, Wash., discharge

measurements In.................. 809

gaging-station records in...........191-206

reservoirs In........................ 196

198

196

195

191

194

o