Quality of

Surface Waters of the 

United States 

1951

Parts 9-14. Colorado River Basin to Pacific 

Slope Basins in Oregon and Lower Columbia 

River Basin

GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1200

Prepared in cooperation with the State of 

California, U. 51 Bureau of Reclamation, and with other agencies

Quality of

Surface Waters of the 

United States 

1951

Parts 9-14. Colorado River Basin to Pacific 

Slope Basins in Oregon and Lower Columbia 

River Basin

Prepared under the direction of S. K. LOVE, Chief, Quality of Water Branch

GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1200

Prepared in cooperation with the State of 

California, U. S. Bureau of Reclamation, and with other agencies

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1955
UNITED STATES DEPARTMENT OF THE INTERIOR 

Douglas McKay, Secretary

GEOLOGICAL SURVEY 

W. E. Wrather, Director

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

Washington 25, D. C. - Price $2.00 (paper cover)
PREFACE

This report was prepared by the Geological Survey in cooperation with the State of California, the U. S. Bureau of Reclamation and other agencies by personnel of the Water Resources 

Division under the direction of:

C. G. Paulsen ............. Chief Hydraulic Engineer

S. K. Love .......... Chief, Quality of Water Branch

J. D. Hem, district chemist.. Albuquerque, N. Mex. 

C. S. Howard, regional chemist... Salt Lake City, Utah

III

CONTENTS

Page 

Introduction..................................... A ....... 1

Collection and examination of samples..................... 3

Chemical quality....................................... 3

Suspended sediment .................................... 4

Temperature .......................................... 5

Expression of results.................................... 6

Composition of surface waters............................ 7

Mineral constituents in solution ......................... 8

Silica............................................... 8

Aluminum........................................... 8

Manganese .......................................... 9

Iron ................................................ 9

Calcium............................................. 9

Magnesium.......................................... 9

Sodium and potassium ................................ 10

Carbonate and bicarbonate ............................ 10

Sulfate.............................................. 10

Chloride ............................................ 10

Fluoride ............................................ ll

Nitrate ............................................. 11

Boron .............................................. 11

Dissolved solids ..................................... 12

Properties and characteristics of water .................. 12

Oxygen consumed .................................... 12

Color............................................... 12

Hydrogen-ion concentration ........................... 12

Specific conductance ................................. 13

Hardness ........................................... 13

Total acidity ........................................ 13

Corrosiveness....................................... 14

Percent sodium...................................... 14

Sediment.............................................. 14

Publications ............................................ 15

Cooperation............................................. 16

Division of work .......................................; 17

Stream now............................................. 18

Literature cited .......................................... 18

Chemical analyses, water temperatures, and suspended

sediment ......................................... 20

Part 9-Colorado River basin ............................ 20

Colorado River at Hot Sulphur Springs, Colo. (main

stem) ............................................ 20

Eagle River basin .................................... 23

V
VI CONTENTS

Chemical analyses, etc. Continued 

Colorado River basin--Continued

Eagle River basin--Continued Page

Eagle River below Gypsum, Colo................... 23

Colorado River near Glenwood Springs, Colo. (main

stem).......................................... 26

Colorado River near Cameo, Colo. (main stem) ....... 29

Gunnison River basin................................ 32

Gunnison River near Grand Junction, Colo........... 32

Dolores River basin................................. 35

Dolores River at Gateway, Colo.................... 35

Dolores River near Cisco, Utah.................... 38

Colorado River near Cisco, Utah (main stem).......... 43

Green River basin .................................. 49

Green River near Green River, Wyo................ 49

Blacks Fork near Green River, Wyo................ 53

Henrys Fork at Linwood, Utah ..................... 56

Yampa River near Maybell, Colo................... 58

Little Snake River near Lily, Colo.................. 64

Green River near Jensen, Utah..................... 67

Green River at Jensen, Utah....................... 71

Duchesne River near Randlett, Utah ................ 74

Green River near Ouray, Utah ..................... 77

White River near Watson, Utah .................... 82

Willow Creek near Ouray, Utah .................... 85

Price River at Woodside, Utah..................... 88

Green River at Green River, Utah.................. 90

San Rafael River near Green River, Utah ........... 96

Dirty Devil River basin ............................. 102

Dirty Devil River near Kite, Utah .................. 102

Colorado River at Kite, Utah (main stem) ............. 105

Escalante River Basin .............................. Ill

Escalante River at Mouth near Escalante, Utah ...... Ill

San Juan River basin................................ 113

San Juan River near Blanco, N. Mex................ 113

Animas River at Farmington, N. Mex............... 119

San Juan River at Shiprock, N. Mex ................ 125

San Juan River near Bluff, Utah...................: 129

Colorado River at Lees Ferry, Ariz. (main stem) ..... 136

Paria River basin................................... 144

Paria River at Lees Ferry, Ariz. .................. 144

Little Colorado River basin .......................... 147

Little Colorado River at Woodruff, Ariz............. 147

Little Colorado River at Cameron, Ariz............. 153

Colorado River near Grand Canyon, Ariz. (main stem).. 154

Virgin River basin .................................. 161

Virgin River at Virgin, Utah ...................... 161

Washington Fields Canal near Washington, Utah ..... 164

Santa Clara River above Winsor Dam, near Santa

Clara, Utah .................................... 165
CONTENTS VII

Chemical analyses, etc. Continued 

Colorado River basin Continued

Virgin River basin--Continued Page 

Santa Clara River at St. George, Utah .............. 166

Virgin River near St. George, Utah ................ 167

Virgin River at Littlefield, Ariz.................... 168

Miscellaneous analyses of streams in Virgin River 

basin in Utah ................................... 175

Lake Mead near Boulder City, Nev. (main stem)....... 176

Colorado River below Hoover Dam, Ariz. -Nev. (main

stem).......................................... 182

Gila River basin .................................... 185

Gila River at Kelvin, Ariz......................... 185

Salt River at Stewart Mountain Dam, Ariz .......... 188

Verde River below Bartlett Dam, Ariz.............. 191

Agua Fria River below Lake Pleasant Dam, Ariz .... 194

Gila River below Gillespie Dam, Ariz .............. 195

Diversions and Return Flows at and below Imperial

Dam........................................... 198

Yuma Main Canal below Colorado River Siphon at 

Yuma, Ariz .................................... 198

Part 10-The Great Basin .............................. 200

Sevier Lake basin .................................. 200

Sevier River near Lynndyl, Utah ................... 200

Salton Sea basin .................................... 202

Miscellaneous analyses of streams in Salton Sea 

basin in California ............................... 202

Humboldt River basin ............................... 203

Miscellaneous analyses of streams in Humboldt 

River basin in Nevada ........................... 203

Pyramid and Winnemucca Lakes basin ................ 205

Miscellaneous analyses of streams in Pyramid and 

Winnemucca Lakes basin in California ............ 205

Part 11-Pacific Slope basins in California............... 206

Tulare Lake basin .................................. 206

Miscellaneous analyses of streams in Tulare Lake 

basin in California .............................. 206

San Joaquin River basin ............................. 207

San Joaquin River near Vernalis, Calif ............. 207

Stockton Diverting Canal at Stockton, Calif .......... 210

Mokelumne River at Woodbridge, Calif.............. 212

Miscellaneous analyses of streams in San Joaquin 

River basin in California ........................ 214

Sacramento River basin ............................. 216

Sacramento River at Delta, Calif................... 216

Pit River near Montgomery Creek, Calif............ 217

Squaw Creek above Shasta Lake, Calif .............. 218

McCloud River above Shasta Lake, Calif ............ 219

Sacramento River at Knights Landing, Calif ......... 220
VIII CONTENTS

Chemical analyses, etc. --Continued 

Pacific Slope basins in California--Continued

Sacramento River basin--Continued Page 

Feather River at Nicolaus, Calif .................. 222

American River at Fair Oaks, Calif ............... 224

Miscellaneous analyses of streams in Sacramento 

River basin in California........................ 226

Russian River basin ............................... 230

Miscellaneous analyses of streams in Russian 

River basin in California........................ 230

Klamath River basin ............................... 231

Miscellaneous analyses of streams in Klamath 

River basin in California ....................... 231

Part 12-Pacific Slope Basins in Washington and Upper

Columbia River Basin ........................... 232

Upper Columbia River basin ........................ 232

Columbia River at Grand Coulee Dam, Wash, (main

stem) ......................................... 232

Part 13-Snake River basin............................ 235

Snake River at Neeley, Idaho (main stem) ............ 235

Snake River at King Hill, Idaho (main stem) .......... 236

Boise River basin ................................. 238

Boise River at Notus, Idaho....................... 238

Miscellaneous analyses of streams in Snake River

basin in Idaho.................................. 241

Part 14-Pacific Slope Basins in Oregon and Lower

Columbia River Basin .......................... 242

John Day River basin............'................... 242

Desolation Creek near Dale, Oreg................. 242

Columbia River at Maryhill Ferry near Rufus,

Oreg. (main stem) ............................. 243

Deschutes River basin.............................. 246

Warm Springs River at Hehe Mill near Warm Springs, 

Oreg.......................................... 246

Klickitat River basin ............................... 247

Klickitat River near Glenwood, Wash .............. 247

Klickitat River near Pitt, Wash ................... 249

Hood River basin .................................. 251

Green Point Creek below North Fork near Dee, 

Oreg.......................................... 251

Sandy River basin.................................. 252

Bull Run River at Bull Run, Oreg.................. 252

Willamette River basin ............................. 254

Middle Fork Willamette River below North Fork 

near Oakridge, Oreg............................ 254

Middle Fork Willamette River at Lowell, Oreg...... 255

Fall Creek below Winberry Creek near Fall Creek, 

Oreg........................ ................. 256

Lookout Creek near Blue River, Oreg.............. 258
CONTENTS IX

Chemical analyses, etc. --Continued 

Pacific Slope Basins in Oregon and Lower Columbia 

River basin Continued

Willamette River basin--Continued Page 

North Santiam River below Boulder Creek near 

Detroit, Oreg................................... 260

Breitenbush River above Canyon Creek near 

Detroit, Oreg................................... 261

Willamette River at Salem, Oreg ................... 262

Lewis River basin .................................. 264

Lewis River at Ariel, Wash........................ 264

East Fork Lewis River near Heisson, Wash ......... 265

Cowlitz River basin ................................ 266

Cispus River near Randle, Wash ................... 266

Rainy Creek near Kosmos, Wash................... 267

West Fork Tilton River near Morton, Wash.......... 269

Cowlitz River near Mayfield, Wash ................. 271

Toutle River near Silver Lake, Wash ............... 272

Cowlitz River at Castle Rock, Wash ................ 273

Coweman River near Kelso, Wash .................. 275

Abernethy Creek basin .............................. 277

Abernethy Creek near Longview, Wash. ............. 277

Clatskanie River basin .............................. 278

Clatskanie River near Clatskanie, Oreg............. 278

Elokomin River basin ............................... 279

Elokomin River near Cathlamet, Wash.............. 279

Big Creek basin .................................... 280

Big Creek near Knappa, Oreg...................... 280

Grays River basin .................................. 281

West Branch Grays River near Grays River, Wash... 281

Youngs River basin ................................. 282

North Fork Klaskanine River near Olney, Oreg ...... 282

Index ................................................. 283

ILLUSTRATION

Page

Figure 1. Map of the United States showing basins covered 

by the four water-supply papers on quality of surface 

waters in 1951.................................... 2

QUALITY OF SURFACE WATERS 

OF THE UNITED STATES, 1951

PARTS 9-14

INTRODUCTION

The quality-of-water investigations of the United States Geological Survey are concerned with chemical and physical characteristics of the surface and ground water supplies of the Nation. 

Most of the investigations carried on in cooperation with States 

and other Federal agencies deal with the amounts of matter in 

solution and in suspension in streams.

The records of chemical analysis, suspended sediment, and 

temperature for surface waters given in this volume serve as a 

basis for determining the suitability of the waters examined for 

industrial, agricultural, and domestic uses insofar as such use 

is affected by the dissolved or suspended mineral matter in the 

waters. The discharge of a stream and, to a lesser extent, the 

chemical quality are related to variations in rainfall and other 

forms of precipitation. In general, lower concentrations of dissolved solids may be expected during the periods of high flow than 

during periods of low flow. The concentration in some streams 

may change materially with relatively small variations in flow, 

whereas for other streams the quality may remain relatively 

uniform throughout large ranges in discharge. The quantities 

of suspended sediment carried by streams are also related to 

discharge, and during flood periods the sediment concentrations 

in many streams vary over wide ranges.

The regular yearly publication of records of chemical analyses, suspended sediment, and water temperature was begun by 

the Geological Survey in 1941. The annual records prior to 1948 

were published in a single volume for the entire country. Beginning in 1948, the records were published in two volumes, and 

beginning in 1950, in four volumes, covering the drainage basins 

shown in figure 1. The samples for which data are given were 

collected from October 1, 1950, to September 30, 1951. Descriptive statements are given for each sampling station for which 

regular series of chemical analyses or sediment determinations 

have been made. These statements include the location of the 

stream-sampling station, drainage area, length of time for which 

records are available, extremes of dissolved solids, total hardness, sediment loads, water temperature, and other pertinent 

data. Records of water discharge of the streams at, or near, 

the sampling .point for the sampling period are included in most 

tables of analyses. The records are arranged by drainage basins, according to Geological Survey practice in reporting records of stream flow.

1
QUALITY OF SURFACE WATERS, 1951

This report Parts 1-4; WSP 1197 

Parts 5-6; WSP 1198 

Parts 7-8; WSP 1199

Figure 1. Map of the United States showing basins covered 

by the four water-supply papers on quality of surface waters 

in 1951. The shaded portion represents the section of the 

country covered by this volume; the unshaded portion represents the section of the country covered by other watersupply papers.

Beginning with the series of reports for the water year ending 

September 30, 1951, the order of listing station records has been 

changed. In this report, stations on tributary streams are listed 

between stations on the main stream in the order in which those 

tributaries enter the main stem. Stations on tributaries to tributaries are inserted in a similar manner.

During the year ended September 30, 1951, 60 regular sampling stations on 41 streams for the study of the chemical character of surface waters were maintained by the Geological Survey in the area covered by this volume. Samples were collected 

less frequently during the year at many other points. Water temperatures were measured daily at 92 of the regular sampling stations. Not all analyses of samples of surface water collected 

during the year have been included. Single analyses of an incomplete nature generally have been omitted. Also, determinations 

made on the daily samples before compositing have not been reported. Specific conductance was usually determined on each 

daily sample, and pH, chloride, or other determinations were 

also made on many of the daily samples. As noted in the table 

headings these data are available for reference at the district offices listed under Division of Work, on page 17.

Quantities of suspended sediment are reported for 18 stations during the year ended September 30, 1951. The sediment 

samples were collected one or more times daily at most stations, depending on the rate of flow and changes in stage of the
COLLECTION AND EXAMINATION OF SAMPLES 3

stream. Sediment samples were collected less frequently during the year at many other points. In connection with measurements of sediment discharge, sizes of sediment particles were 

determined at 17 of the stations. As noted under "Remarks" in 

the table headings, suspended-sediment concentrations also were 

determined from the samples collected for chemical analysis in 

some parts of the country. The data do not provide a reliable 

basis for computing the loads of suspended sediment carried by 

the stream but may be of value for design and operation of filtration plants utilizing these stream waters. Records of these infrequent determinations are available for reference in the district 

offices listed.

Material which is transported essentially in continuous contact 

with the stream bed is termed bed load and is not considered in 

this report. All other undissolved material in transport is termed suspended sediment and generally constitutes the major part 

of the total sediment load. At the present time no reliable method has been developed for deter mining bed load on a routine basis.

COLLECTION AND EXAMINATION OF SAMPLES 

CHEMICAL QUALITY

Samples for chemical analysis were usually collected daily 

at, or near, points on streams where gaging stations are maintained for measurement of water discharge. Most of the analyses were made on 10-day composites of daily samples collected 

for a period of a year at each sampling point. Three composite 

samples were usually prepared each month by mixing together 

equal volumes of daily samples collected from the 1st to the 10th, 

from the llth to the 20th, and during the remainder of the month. 

For some streams that are subject to sudden and large changes 

in chemical composition or concentration, samples were composited for shorter periods on the basis of the concentration of 

dissolved solids indicated by measurements of specific conductance of the daily samples.

The samples were analyzed according to methods regularly 

used by the Geological Survey. These methods are essentially 

the same as or are modifications of methods described in recognized authoritative publications for the mineral analysis of water 

samples (Collins, 1928; Am. Public Health Assoc., 1946).

For those waters containing moderately large quantities of 

soluble salts, the value reported for dissolved solids is the sum 

of the quantities of the various determined constituents using the 

carbonate equivalent of the reported bicarbonate. In other analyses the value reported as dissolved solids is the residue on evaporation after drying at 180°C for 1 hour. Specific conductance 

is given for most analyses and was determined by means of a conductance bridge using a standard potassium chloride solution as 

reference.
QUALITY OF SURFACE WATERS, 1951

SUSPENDED SEDIMENT

In general, samples were collected daily with the. US D-43 

depth-integrating sampler (U. S. Inter-agency, 1948, p. 70-76) 

from a fixed sampling point at one vertical in the cross section. 

The US DH-48 hand sampler was used at many stations during 

periods of low flow. Suspended-sediment samples, consisting 

of depth-integrated samples at three or more verticals in the cross 

section were made periodically to determine the cross-sectional 

distribution of the suspended concentration with respect to that at 

the daily sampling vertical. In streams where comparatively rapid fluctuations in transverse distribution of water discharge or 

sediment concentration are encountered at the sampling point, 

samples were taken regularly at two or more verticals to determine the average concentration across the section. During periods of high flow, samples were taken two or more times throughout the day at many sampling stations, and during periods of rapidly changing flow samples were taken hourly at some stations.

Sediment concentrations were deter mined by filtration or evaporation of the samples as required. At many stations the mean 

daily concentration for some days was obtained by plotting the 

instantaneous concentrations on the original or copies of the original gage-height chart. The plotted concentrations adjusted, if 

necessary, for cross-sectional distribution with respect to that 

at the daily sampling vertical, were connected or averaged by 

continuous curves to obtain a concentration graph. This graph 

represented the estimated concentration at any time and, for most 

periods, mean daily concentrations were determined from the 

graph. When the concentration and water discharge were changing rapidly, the day was often subdivided for this computation. 

For some periods when the day-to-day variation in the concentration was negligible, the data were not plotted, and the average 

concentration of the samples was used as the mean concentration 

for the day. For certain stations, when the discharge and sediment concentrations were relatively low and varied only slightly 

from day to day, the samples for a number of days were composited and the mean daily concentrations and mean daily loads are 

shown.

For some periods when no samples we re collected, daily sediment loads were estimated on the basis of water discharge, sediment concentrations observed immediately preceding and following the periods, and sediment loads for other periods of similar 

discharge. The estimates were further guided by weather conditions and sediment discharge for other stations.

In many instances where there were no observations for several days, the sediment loads for individual days are not estimated, as numerous factors influencing the quantities of transported sediment made it very difficult to make accurate estimates 

of sediment loads for individual days. However, estimated sedi-
COLLECTION AND EXAMINATION OF SAMPLES 5

ment loads for missing days in an otherwise continuous period 

of sampling have been included in monthly and annual totals for 

most streams to provide a complete record.

In addition to the records of total quantities of sediment, records of the particle sizes of sediment are included also. The 

particle sizes of the suspended sediments were determined periodically for many of the stations. As much of the material carried in suspension can pass through the finest sieves, the bottomwithdrawal tube method (U. S. Inter-agency, 1943, p. 82-90) 

was used in most of the analyses. Generally, sieves were used 

in the determination of particle sizes for sediments which were 

predominantly coarser than 0. 062 mm. Size distribution for some 

sediments was determined by a combination of sieves and pipette 

methods in which the size fraction 0. 062 mm and larger was analyzed by sieves and that smaller than 0. 062 mm was analyzed 

by the pipette method (Kilmer and Alexander, 1949). Native or 

distilled water, as noted in the tables of analyses, was used as 

the settling medium. In some instances, chemical dispersing 

agents were added to the settling medium. As settling diameters 

of the clay and colloidal fractions are often affected by the chemical character of the settling medium, analyses made using native water may more nearly simulate particle sizes existing in the 

stream. Results of analyses using distilled water or using a settling medium containing dispersing agents approximate ultimate 

particle sizes of the finer fractions. The concentration of sediment suspension for analysis was reduced to less than 5,000 

parts per million, where necessary, by means of a sample splitter, in order to stay within limits recommended for the bottomwithdrawal tube or pipette method. The concentration of suspended sediment used in the bottom -withdrawal tube or pipette cylinder was often different from the concentration in the original 

suspension. The concentration at which analyses were made is 

indicated in the appropriate tables.

TEMPERATURE

For most of the stations, daily water temperatures were obtained at the time that the chemical quality or sediment samples 

were collected. So far as practicable the water temperatures 

were observed at about the same time each day for an individual 

river station in order that the data would be relatively unaffected by diurnal variations in temperature. For most large, swiftly flowing streams the diurnal variation in water temperature 

is probably small, but for sluggish or shallow streams the daily 

range in temperature may amount to several degrees and may 

follow closely changes in air temperature. The thermometers 

used for determination of water temperature were accurate to 

plus or minus about 0. 5°F.

Records of thermograph observations consist of maximum 

and minimum temperatures for each day, and the monthly averages of the maximum daily and minimum daily temperatures.
QUALITY OF SURFACE WATERS, 1951

EXPRESSION OF RESULTS

The dissolved mineral constituents are reported in parts per 

million. A part per million is a unit weight of a constituent in 

a million unit weights of water. Equivalents per million are not 

given in this report although the expression of analyses in equivalents per million is sometimes preferred. An equivalent per 

million is a unit chemical combining weight of a constituent in 

a million unit weights of water and is calculated by dividing the 

concentration in parts per million by the chemical combining 

weight of the constituent. For convenience in making this conversion the reciprocals of chemical combining weights of the 

most commonly reported constituents (ions) are given in the following table:

Constituent Factor Constituent Factor

Iron (Fe++) .......... 0. 0358 Carbonate (CO3 '-) .. 0. 0333

Iron (Fe+++) ......... . 0537 Bicarbonate (HCO3 -) . 0164

Calcium (Ca++) ...... . 0499 Sulfate (SO4 ~~)...... . 0208

Magnesium (Mg++) .... 0822 Chloride (Cl~)...... . 0282

Sodium (Na+) ........ . 0435 Fluoride-(F') ...... . 0526

Potassium (K+) ...... .0256 Nitrate (NO3~)...... .0161

Results given in parts per million can be converted to grains 

per United States gallon by dividing by 17.12. A calculated quantity of sodium and potassium is given in some analyses and is the 

quantity of sodium needed in addition to the calcium and magnesium to balance the acid constituents.

The total hardness, as calcium carbonate (CaCO3), is calculated from the equivalents of calcium and magnesium except for 

a few .samples for which the reported values also include equivalents of free mineral acid, aluminum, iron, and manganese 

when present in significant quantities. The hardness caused by 

calcium and magnesium (and other ions if significant) equivalent 

to the carbonate and bicarbonate is called carbonate hardness; 

the hardness in excess of this quantity is called noncarbonate 

hardness.

In the analyses of most waters used for irrigation, the quantity of dissolved solids is given in tons per acre-foot as well as 

in parts per million. Percent sodium has been computed for those 

analyses where sodium and potassium are reported separately 

by dividing the equivalents per million of sodium by the sum of 

the equivalents per million of calcium, magnesium, sodium, and 

potassium and multiplying the quotient by 100. In analyses where 

sodium and potassium were calculated and reported as a combined value, the value reported for percent sodium will include 

the equivalent quantity of potassium. In most waters of moder-
COMPOSITION OF SURFACE WATERS 7

ate to high concentration, the proportion of potassium is much 

smaller than that of sodium.

Specific conductance values are expressed in reciprocal ohms 

(micromhos at 25°C). The discharge of the streams is reported 

in second-feet (See Stream Flow, p. 18 ) and the temperature in 

degrees Fahrenheit. Color is expressed in units of the platinumcobalt scale proposed by Hazen (1892, p. 427-428). Hydrogenion concentration (pH) is given as the negative logarithm of the 

number of moles of ionized hydrogen per liter of water.

An average of analyses (arithmetical or weighted) for the water year is given for most daily sampling stations. An arithmetical average represents the composition of water that would 

be contained in a vessel or reservoir that had received equal 

quantities of water from the river each day for the water year. 

A weighted average represents approximately the composition 

of water that would be found in a reservoir containing all of the 

water passing a given station during the year after thorough mixing in the reservoir. The weighted average Of the analyses is 

computed by multiplying the discharge for the sampling period 

by the quantities of the individual constituents for the corresponding period and dividing the sum of the products by the sum 

of the discharges. Water as represented by the weighted average is less concentrated than that represented by the average of 

the individual analyses for most streams because at times of high 

discharge the rivers generally have lower concentrations of dissolved solids.

Mean daily sediment concentrations are expressed in parts per 

million by weight. A part per million of sediment is computed as 

1,000,000 timesthe ratio of the weight of sediment to the weight of 

water-sediment mixture. Daily sediment loads are expressed in 

tons per day, and except for subdivided days are usually obtained 

by multiplying daily mean sediment concentration in parts per million by the daily mean discharge, and the appropriate conversion 

factor, normally 0. 0027.

Particle-size analyses are expressed in percentages finer than 

indicated size sin millimeters. The size classification used in this 

report is that recommended by the American Geophysical Union 

Subcommittee on sediment terminology (Lane, et al; 1947, p. 937). 

Other data included as pertinent to the size analyses for many 

streams are the date of collection, the stream discharge and sediment concentration when sample was collected, the concentration 

of the suspension during analysis, and the method of analysis.

COMPOSITION OF SURFACE WATERS

All natural waters contain dissolved mineral matter. Water 

in contact with soils or rock, even for only a few hours, will 

dissolve some rock materials. The quantity of dissolved mineral matter in a natural water depends primarily on the type of 

rocks or soils through which the water has passed and the length
8 QUALITY OF SURFACE WATERS, 1951

of time it has been in contact with the rocks or soils. Some 

streams are fed by both surface runoff and underground water 

from springs or seeps. Such streams reflect the chemical character of their concentrated underground sources during dry periods and are more dilute during periods of heavy rainfall. Underground water is usually more highly concentrated than surface 

runoff as it remains in contact with the rocks and soils for much 

longer periods. The concentration of dissolved solids in a river 

water is frequently increased by drainage from mines or oil fields, 

by the addition of industrial or municipal wastes, or in irrigated regions by return drain waters.

The mineral constituents and physical properties of natural 

waters reported in the tables of analyses include those that have 

a practical bearing on the value of the waters for most purposes. 

The analyses generally include results for silica, iron, calcium, 

magnesium, sodium, potassium (or sodium and potassium together as sodium), bicarbonate, sulfate, chloride, fluoride, nitrate, boron, and dissolved solids. Aluminum, manganese, color, pH, acidity, oxygen consumed, and other dissolved constituents and physical properties are reported for certain streams. 

The source and significance of the different constituents and properties of natural waters are discussed in the following paragraphs.

MINERAL CONSTITUENTS IN SOLUTION

Silica (Si02)

Silica is dissolved from practically all rocks. Some natural 

surface waters contain less than 5 parts per million of silica 

and few contain more than 50 parts, but the more common range 

is from 10 to 30 parts per million. Silica affects the usefulness 

of a water because it contributes to the formation of boiler scale; 

it usually is removed from feed water for high-pressure boilers. 

Silica also forms troublesome deposits on the blades of steam 

turbines.

Aluminum (Al)

Aluminum is usually present only in negligible quantities in 

natural waters except in areas where the waters have been in 

contact with the more soluble rocks of high aluminum content 

such as bauxite and certain shales. Acid waters often contain 

large amounts of aluminum. It may be troublesome in feed waters where it tends to be deposited as a scale on boiler tubes.
COMPOSITION OF SURFACE WATERS

Manganese (Mn)

Manganese is dissolved in appreciable quantities from rocks 

in some sections of the country. Waters impounded in large reservoirs may contain manganese that has been dissolved from the 

mud on the bottom of the reservoir by action of carbon dioxide 

produced by anaerobic fermentation of organic matter. Manganese is not regularly determined in areas where it is not present 

in the waters in appreciable amounts. It is especially objectionable in water used in laundry work and in textile processing. 

Concentrations as low as 0. 2 part per million may cause a darkbrown or black stain on fabrics and porcelain fixtures. Appreciable quantities of manganese are often found in waters containing objectionable quantities of iron.

Iron (Fe)

Iron is dissolved from many rocks and soils. On exposure 

to the air, normal basic waters that contain more than 1 part per 

million of iron soon be come turbid with the insoluble reddish ferric oxide produced by oxidation. Surface waters, therefore, seldom contain as much as 1 part per million of dissolved iron, 

although some acid waters carry large quantities of iron in solution. Iron causes reddish-brown stains on white porcelain or 

enameled ware and fixtures and on fabrics washed in the water.

Calcium (Ca)

Calcium is dissolved from practically all rocks and soils, 

but the highest concentrations are usually found in waters that 

have been in contact with limestone, dolomite, and gypsum. Calcium and magnesium make water hard and are largely responsible for the formation of boiler scale. Most waters associated 

with granite or silicious sands contain less than 10 parts per 

million of calcium; waters in areas where rocks are composed 

of dolomite and limestone contain from 30 to 100 parts per million; and waters that have come in contact with deposits of gypsum may contain several hundred parts per million.

Magnesium (Mg)

Magnesium is dissolved from many rocks, particularly from 

dolomitic rocks. Its effect in water is similar to that of calcium. 

The magnesium in soft waters may amount to only 1 or 2 parts 

per million, but water in areas that contain large quantities of 

dolomite or other magnesium-bearing rocks may contain from 

20 to 100 parts per million or more of magnesium.
10 QUALITY OF SURFACE WATERS, 1951

Sodium and potassium (Na and K)

Sodium and potassium are dissolved from practically all rocks. 

Sodium is the predominant cation in some of the more highly mineralized waters found in the western Untied States. Natural waters that contain only 3 or 4 parts per million of the two together 

are likely to carry almost as much potassium as sodium. As the 

total quantity of these constituents increases, the proportion of 

sodium becomes much greater. Moderate quantities of sodium 

and potassium have little effect on the usefulness of the water for 

most purposes, but waters that carry more than 50 or 100 parts 

per million of the two may require careful operation of steam 

boilers to prevent foaming. More highly mineralized waters that 

contain a large proportion of sodium salts may be unsatisfactory 

for irrigation.

Carbonate and bicarbonate (C03 and HCOS)

Bicarbonate occurs in waters largely through the action of 

carbon dioxide, which enables the water to dissolve carbonates 

of calcium and magnesium. Carbonate as such is not usually 

present in appreciable quantities in natural waters. The bicarbonate in waters that come from relatively insoluble rocks may 

amount to less than 50 parts per million; many waters from limestone contain from 200 to 400 parts per million. Bicarbonate in 

moderate concentrations in water has no effect on its value for 

most uses. Bicarbonate or carbonate is an aid in coagulation 

for the removal of suspended matter from water.

Sulfate (S04 )

Sulfate is dissolved from many rocks and soils--in especially 

large quantities from gypsum and from beds of shale. It is formed also by the oxidation of sulfides of iron and is therefore present in considerable quantities in waters from mines. Sulfate in 

waters that contain much calcium and magnesium causes the formation of hard scale in steam boilers and may increase the cost 

of softening the water.

Chloride (Cl)

Chloride is dissolved from rock materials in all parts of the 

country. Surface waters in the humid regions are usually low in 

chloride, whereas streams in arid or semiarid regions may contain several hundred parts per million of chloride leached from 

soils and rocks, especially where the streams receive return 

drainage from irrigated lands or are affected by ground-water 

inflow carrying appreciable quantities of chloride. Large quantities of chloride may affect the industrial use of water by in-
COMPOSITION OF SURFACE WATERS 11

creasing the corrosiveness of waters that contain large quantities 

of calcium and magnesium.

Fluoride (F)

Fluoride has been reported as being present in some rocks 

to about the same extent as chloride. However, the quantity of 

fluoride in natural surface waters is ordinarily very small compared to that of chloride. Recent investigations indicate that the 

incidence of dental caries is less when there are small amounts 

of fluoride present in the water supply than when there is none. 

However, excess fluoride in water is associated with the dental 

defect known as mottled enamel if the water is used for drinking 

by young children during calcification or formation of the teeth 

(Dean, 1936, p. 1269-1272). This defect becomes increasingly 

noticeable as the quantity of fluoride in water increases above 

1.5 to 2.0 parts per million.

Nitrate (NO,)

Nitrate in water is considered a final oxidation product of nitrogenous material and in some instances may indicate previous 

contamination by sewage or other organic matter. The quantities 

of nitrate present in surface waters usually amount to less than 

5 parts per million (as NO3) and have no effect on the value of 

the water for ordinary uses.

It has been reported that as much as 2 parts per million of 

nitrate in boiler water tends to decrease inter crystalline cracking of boiler steel. Studies made in Illinois indicate that nitrates 

in excess of 70 parts per million (as NO3) may contribute to methemoglobinemia ("blue babies") (Faucett and Miller, 1946, p. 

593), and more recent investigations conducted in Ohio show that 

drinking water containing nitrates in the range of 44 to 88 parts 

per million or more (as NO3) may be the cause of methemoglobinemia in infants (Waring, 1949). In a report published by the 

National Research Council, Maxcy (1950, p. 271) concludes that 

a nitrate content in excess of 44 parts per million (as NO3) should 

be regarded as unsafe for infant feeding.

Boron (B)

Boron in small quantities has been found essential for plant 

growth, but irrigation water containing more than 1 part per million boron is detrimental to citrus and other boron-sensitive 

crops. Boron is reported in Survey analyses of surface waters 

in arid and semiarid regions of the Southwest and West where 

irrigation is practiced or contemplated, but few of the surface 

waters analyzed have harmful concentrations of boron.
12 QUALITY OF SURFACE WATERS, 1951

Dissolved solids

The reported quantity of dissolved solids--the residue on evaporation consists mainly of the dissolved mineral constituents 

in the water. It may also contain some organic matter and water of crystallization. Waters with less than 500 parts per million of dissolved solids are usually satisfactory for domestic and 

some industrial uses. Waters containing several thousand parts 

per million of dissolved solids are sometimes successfully used 

for irrigation where practices permit the removal of soluble salts 

through the application of large volumes of water on well-drained 

lands.

PROPERTIES AND CHARACTERISTICS OF WATER

Oxygen consumed

The value for oxygen consumed furnishes an approximation 

of the oxidizable matter in the unfiltered and filtered samples 

and gives a partial measure of polluting materials such as sewage and oxidizable industrial wastes. Naturally highly colored 

waters may have relatively high oxygen consumed, although waters that are not noticeably colored may contain oxidizable material.

Color

In water analysis the term "color" refers to the appearance 

of water that is free from suspended solids. Many turbid waters 

that appear yellow, red, or brown when viewed in the stream 

show very little color after the suspended matter has been removed. The ye How-to-brown color of some waters is usually 

caused by organic matter extracted from leaves, roots, and other 

organic substances in the ground. In some areas objectionable 

color in water results from industrial wastes and sewage. Clear 

deep water may appear blue as the result of a scattering of sunlight by the water molecules. Water for domestic use and some 

industrial uses should be free from any perceptible color. A 

color less than 10 usually passes unnoticed. Some swamp waters 

have natural color of 200 to 300 or more.

Hydrogen-ion concentration (pH)

The degree of acidity or alkalinity of water, as indicated by 

the hydrogen-ion concentration, expressed as pH, is related to 

the corrosive properties of water, and is useful in determining 

the proper treatment for coagulation that may be necessary at 

water-treatment plants. A pH value of 7. 0 indicates that the water is neither acid nor alkaline. Waters having pH values progressively lower than 7. 0 denote increasing acidity, whereas 

values progressively higher than 7.0 denote increasing alkalinity.
COMPOSITION OF SURFACE WATERS 13

(See p. 7 ). The pH of most natural surface waters ranges between 6 and 8. Some alkaline surface waters have pH values 

greater than 8. 0, and waters containing free mineral acid usually 

have pH values less than 4. 5.

Specific conductance (micromhos at 25 C)

The specific conductance of a water is a measure of its capacity to conduct a current of electricity. The conductance 

varies with the concentration and degree of ionization of the different minerals in solution and with the temperature of the water. 

When considered in conjunction with results of determinations 

for other constituents, specific conductance is a useful determination and plays an important part in indicating changes in 

concentration of the total quantity of dissolved minerals in surface waters. (See p. 7 .)

Hardness

Hardness is the characteristic of water that receives the most 

attention in industrial and domestic use. It is usually recognized 

by the increased quantity of soap required to produce lather. The 

use of hard water is also objectionable because it contributes to 

the formation of scale in boilers, water heaters, radiators, and 

pipes, with the resultant decrease in rate of heat transfer, possibility of boiler failure, and loss of flow.

Hardness is caused almost entirely by compounds of calcium 

and magnesium. Other constituents such as iron, manganese, 

aluminum, barium, strontium, and free acid also cause hardness, although they usually are not present in quantities large 

enough to have any appreciable effect. Water that has less than 

60 parts per million of hardness is usually rated as soft and suitable for many purposes without further softening. Waters with 

hardness ranging from 61 to 120 parts per million may be considered moderately hard, but this degree of hardness does not 

seriously interfere with the use of water for many purposes except for use in high-pressure steam boilers and in some industrial processes. Waters with hardness ranging from 121 to 200 

parts per million are considered hard, and laundries and industries may profitably soften such supplies. Water with hardness 

above 200 parts per million usually requires some softening before being used for most purposes.

Total acidity

The total acidity of a natural water represents the content 

of free carbon dioxide, mineral acids, and salts especially sulfates of iron and aluminum--that hydrolyze to give hydrogen ions. 

Acid waters are very corrosive and generally contain excessive 

amounts of objectionable constituents, such as iron, aluminum, 

and manganese.
14 QUALITY OF SURFACE WATERS, 1951

Corrosiveness

The corrosiveness of a water is that property which makes 

the water aggressive to metal surfaces and frequently results 

in the appearance of the "red water" caused by solution of iron. 

The disadvantages of iron in water have been discussed previously. Additionally, corrosion causes the deterioration of water 

pipes, steam boilers, and water-heating equipment. Many waters 

that do not appreciably corrode cold-water lines will aggressively attack hot-water lines. Oxygen, carbon dioxide, free acid, 

and acid-gene rating salts are the principal constituents in water 

that cause corrosion. In a general way, very soft waters of low 

mineral content tend to be more corrosive than hard waters containing appreciable quantities of carbonates and bicarbonates of 

calcium and magnesium.

Percent sodium

Percent sodium is reported in most of the analyses of waters 

collected from streams in the western part of the country where 

irrigation is practiced extensively. The proportion of sodium to 

all the basic constituents in the water has a bearing on the suitability of a water for irrigation. (See p. 6 .) Waters in which 

the percent sodium is more than 60 may be injurious when applied to certain types of soils, particularly when adequate drainage is not provided (Magistad and Christiansen, 1944, p. 8-9; 

Wilcox, 1948, p. 6).

SEDIMENT

Fluvial sediment is generally regarded as that sediment which 

is transported by, suspended in, or deposited by water. Suspended sediment is that sediment which remains in suspension 

in water owing to the upward components of turbulent currents 

or by colloidal suspension. Most fluvial sediment results from 

the normal process of erosion, which in turn is part of the geologic cycle of rock transformation. In some instances, this normal process may have been accelerated by agricultural practices. Sediment also results from a number of industrial activities. In certain sections, waste materials from mining, logging, 

oil-field, and other industrial operations introduce large quantities 

of suspended as well as dissolved material.

The quantity of sediment, transported or available for transportation, is affected by climatic conditions, form or nature of 

precipitation, vegetal cover, topography, and land use. An important property of fluvial sediment is the fall velocity of the 

particles in transport. Particle sizes, as determined by various
PUBLICATIONS 15

methods, represent mechanical diameters, which are related to 

sedimentation diameters indirectly. Sediment particles in the 

sand-size (larger than 0.062 mm) range do not appear to be affected by flocculation or dispersion resulting from the mineral 

constituents in solution. The sedimentation diameter of clay and 

silt particles in suspension may vary considerably from point to 

point in a streamer reservoir, depending on the mineral matter in 

solution and in suspension and the degree of turbulence present. 

The size of sediment par tides in transport at any point depends on 

the type of credible and soluble material in the drainage area, the 

degree of flocculation present, time in transport, and characteristics of the transporting flow. The flow characteristics include velocity of water, turbulence, and the depth, width, and roughness of 

the channel. As a result of these variable characteristics, the 

size of particles transported, as well as the total sediment load, 

is in constant adjustment with the characteristics and physical 

features of the stream and drainage area.

PUBLICATIONS

Reports giving chemical analyses, suspended-sediment loads, 

and water temperatures of samples of surface water made by the 

Geological Survey have been published yearly since 1941. Records 

for the years ended September 30, 1941, 1942, 1943, 1944, 1945, 

1946, 1947, 1948, 1949, and 1950, for many of the stations listed 

in this report are given in Water-Supply Papers 942, 950, 970, 

1022. 1030, 1050, 1102, 1133, 1163, and 1189.

Geological Survey reports containing analyses of surfacewater samples collected prior to 194JL are listed below. Publications dealing largely with the quality of ground-water supplies 

and only incidentally covering the chemical composition of surfacewaters are not included. Publications that are out of print are 

preceded by an asterisk.

PROFESSIONAL PAPER

*135. Composition of river and lake waters of the United States, 

1924.

BULLETINS

*479. The geochemical interpretation of water analyses, 1911. 

770. The data of geochemistry, 1924.

WATER-SUPPLY PAPERS

*108. Quality of water in the Susquehanna River drainage basin, 

with an introductory chapter on physiographic features, 

1904.
16 QUALITY OF SURFACE WATERS, 1951

*161. Quality of water in the upper Ohio River basin and at Erie, 

Pa., 1906.

*193. The quality of surface waters in Minnesota, 1907.

*236. The quality of surface waters in the United States, Part 

1, Analyses of waters east of the one hundredth meridian, 1909.

*237. The quality of the surface waters of California, 1910.

*239. The quality of the surface waters of Illinois, 1910.

*273. Quality of the water supplies of Kansas, with a preliminary report on stream pollution by mine waters in southeastern Kansas, 1911.

*274. Some stream waters of the western United States, with 

chapters on sediment carried by the Rio Grande and the 

industrial application of water analyses, 1911.

*339. Quality of the surface waters of Washington, 1914.

*363. Quality of the surface waters of Oregon, 1914.

*418. Mineral springs of Alaska, with a chapter on the chemical 

character of some surface waters of Alaska, 1917.

*596-B. Quality of water of Colorado River in 1925-26, 1928.

*596-D. Quality of water of Pecos River in Texas, 1928.

*596-E. Quality of the surface waters of New Jersey, 1928.

*636-A. Quality of water of the Colorado River in 1926-28, 1930.

*636-B. Suspended matter in the Colorado River in 1925-28, 

1930.

*638-D. Quality of water of the Colorado River in 1928-30, 1932.

*839. Quality of water of the Rio Grande basin above Fort Quitman, Tex., 1938.

*889-E. Chemical character of surface water of Georgia, 1944.

*998. Suspended sediment in the Colorado River, 1925-41, 1947. 

1048. Discharge and sediment loads in the Boise River drainage

basin, Idaho, 1939-40, 1948.

1110-C. Quality of water of Conchas Reservoir, New Mexico, 

1939-49, 1952.

Many of the reports listed are available for consultation in the 

larger public and institutional libraries. Copies of Geological 

Survey publications still in print may be purchased at a nominal 

cost from the Superintendent of Documents, Government Printing 

Office, Washington 25, D. C., who will, upon request, furnish 

lists giving prices.

COOPERATION

Financial assistance was furnished by the Bureau of Reclamation of the United States Department of the Interior, inthe operation of some stations in Arizona, and New Mexico. Investigation 

of chemical quality inthe Great Basin and Pacific Slope basins in 

California were initiated in 1951 in cooperation with the State of 

California.

Assistance in collecting records was given by many municipal, 

State, and Federal agencies.
DIVISION OF WORK 17

In addition to the cooperative program, many of the stations 

were operated from funds appropriated directly to the Geological 

Survey for quality-of-water investigations. Investigation of the 

chemical quality and suspended-sediment loads in the Colorado 

River Basin in Arizona, Colorado, Nevada, New Mexico, and Utah 

have been carried on as a continuing Federal project since 1925.

DIVISION OF WORK

The quality-of-water program was conducted by the water resources division of the Geological Survey, Carl G. Paulsen, chief 

hydraulic engineer, and S. K. Love, chief of the quality of water 

branch. The records were collected and prepared for publication 

under supervision of district or regional chemists as follows: In 

New Mexico--!. D. Hem; in Colorado (except that part in Missouri River basin), Nevada, Utah, California, Washington, and 

Idaho--C. S. Howard. Subsequent to the collection of the data in 

this report, one new district office was established in the area 

covered by this report. Any additional analytical data on file for 

the sampling stations can be obtained by writing or visiting the 

responsible Survey quality of water district off ice as listed in the 

following table.

District office

University Station, Box 293 

Albuquerque, N. Mex..

Post Office Box 2657 

Fort Douglas 

Salt Lake City, Utah

2520 Marconi Avenue 

Sacramento, Calif.

Post Office Box 3418 

Portland 8, Oreg.

Drainage basin

Colorado River basin 

(Arizona, New Mexico).

Colorado River basin 

(Colorado, Utah, and 

Nevada).

The Great Basin 

(Utah, Nevada).

The Great Basin (California), 

Pacific Slope basins in 

California.

Pacific Slope basins in 

Washington and upper 

Columbia River basin.

Snake River basin.

Pacific Slope basins in Oregon and lower Columbia 

River basin.
18 QUALITY OF SURFACE WATERS, 1951

STREAM FLOW

Most of the records of stream discharge, used in conjunction 

with the chemical analyses and in the computation of sediment 

loads in this volume, are published in Geological Survey reports 

on the surface-water supply of the United States. The discharge 

reported for a composite sample is usually the average of the 

mean daily discharges for the normal composite period. For analyses in which the composite periods differ from the normal 

10-or 11-day period, the discharges reported are the averages 

of the mean daily discharges for the days indicated. The discharges reported in the tables of single analyses either are daily 

mean discharges or are discharges for the time at which samples 

were collected, computed from a stage-discharge relation or from 

a discharge measurement.

LITERATURE CITED

American Public Health Association, 1946, Standard methods for 

the examination of water and sewage, 9th ed, p. 1-112.

Collins, W. D., 1928, Notes on practical water analysis: U.S. 

Geol. Survey Water-Supply Paper 596-H.

Dean, H. T., 1936, Chronic endemic dental fluorosis: Am. Med. 

Assoc. Jour., v. 107, p. 1269-1272. .

Faucett, R. L., and Miller, H. C., 1946, Methemoglobinemia 

occurring in infants fed milk diluted with well waters of 

high nitrate content: Jour. Pediatrics, v. 29, p. 593.

Hazen, Alien, 1892, A new color standard for natural waters: 

Am. Chem. Jour., v. 12, p. 427-428.

Kilmer, V. J. and Alexander, L. T., 1949, Methods of making 

mechanical analyses of soils: Soil Sci. v. 68, p. 15-24.

Lane, E. W., et al, 1949, Report of the Subcommittee on Terminology: Am. Geophys. Union Trans., v. 28, p. 937.

Magistad, O. C., and Christiansen, J. E., 1944, Saline soils, 

their nature and management: U. S. Dept. Agriculture 

Circ. 707, p. 8-9.

Maxcy, Kenneth F., 1950, Report on the relation of nitrate concentrations in well waters to the occurrence of methemoglobinemia: Natl. Research Council, Bull., Sanitary Engineer, p. 265, App. D.

U. S. Inter-agency Report 7, 1943, A study of methods used in 

measurement and analysis of sediment loads in streams, 

a study of new methods for size analysis of suspended 

sediment samples, p. 82-90; U. S. Engineer Office, St. 

Paul, Minn.
LITERATURE CITED 19

U. S. Inter-agency Report 8, 1948, A study of methods used in 

measurement and analysis of sediment loads of streams, 

measurement of the sediment discharge of streams, p. 

70-76; U. S. Engineer Office, St. Paul, Minn.

Waring, F. Holman, 1949, Significance of nitrates in water supplies: Jour. Am. Water Works Assoc., v. 72, no. 2.

Wilcox, L. V., 1948, Explanation and interpretation of analyses 

of irrigation waters: U. S. Dept. Agriculture Circ. 784, 

p. 6.
CHEMICAL ANALYSES, WATER TEMPERATURES, AND SUSPENDE

PART 9. COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM 

COLORADO RIVER AT HOT SULPHUR SPRINGS, COLO.

LOCATION. At bridge in Hot Sulphur Springs, Grand County, 1 mile downstream from gaging station which i

DRAINAGE AREA. 782 square miles (above gaging station). 

RECORDS AVAILABLE. Chemical analyses: April 1947 to September 1951. 

Water temperatures: April 1949 to September 1951.

159 micromhos Aug. 5; minimum daily, 65.7 micr

5, 12; minimum, freezing point on many days du

109 ppm Aug. 11-20, 1950; minimum. 38 ppm June 

minimum, 20 ppm June 21-30, 1947.

Specific conductance: Maximum daily, 186 micromhos Mar. 30, 1949; minimum daily, 47.6 micromhos June 

Water temperatures: Maximum, 65°F on several days in July and August 1950; minimum, freezing point on 

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conducta

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given in 

Chemical analyses, in parts per million, water year October 1950 to Septemb

EXTREMES, 1950-51. Specific conductance: Maximum daily, 

Water temperatures: Maximum, 61°F July 26, 31, Aug. 1,

EXTREMES, 1947-51. Dissolved solids: (1947-50) Maximum, 

Hardness: (1947-50) Maximum, 71 ppm Aug. 11-20, 1950;

Date of collection

Oct 1-10, 1950 ...

Dec. 11-20 .......

Jan. 1-10, 1951 ...

Feb. 20-28 .......

Mar. 11-20 .......

Mar. 21-31 ......

Mean 

discharge 

(cfs)

97.8 

89.4 

83.9 

95.9 

113 

122

101 

101 

76.3 

75.6 

73.4 

70.5

86.0 

89.2 

92.6 

92.8 

95.6 

107

Temperature

Silica

13

13 

14

13 

14 

12

13

12 

13

Iron 

(Fe)

Calcium 

(Ca)

16

16 

15

15 

14 

15

14

14 

14

Magnesium 

(Mg)

3.1

3.1 

3.8

3.6 

3.7 

3.5

2.9

3.1 

2.4

Sodium *£*- 

(N,\ slum 

(Na) (R)

7.5

6.9 

4.5

4.9 

5.3 

4.6

5.9

4.4 

8.1

Bicarbonate 

(HCO,)

73

71 

66

66 

65 

65

62

60 

65

Sulfate 

(S04 )

6.7

7.0 

6.5

6.6 

6.3 

6.3

5.8

6.1 

6.6

Chloride 

(Cl)

1.4

1.3

1.1

1.0 

1.0 

1.0

1.4

.9 

1.3

Fluoride 

(F)

Nitrate 

(NO,)

0.3

.4 

.6

.8 

.6 

.7

1.0

.7 

.5

Boron 

(B)

a Sum of determined constituents.
Sept. 21-30 ........

183 

260 

512 

576 

954 

1,595

1,104 

1,126 

1,570 

723 

381 

312

256 

160 

178 

109 

97.6 

99.1

11 

13

12 

13

13

14 

14

11

10 

15

18

17 

18

3.1

2.4 

3.1

3.5

2.8 

3.1

4.2

5.2 

4.7

7.9

8.6 

8. 3

72

48 

64

82

79 

82

9.1 

5.5

4.9 

4.9

5.4

5.2 

5.8

2.0 

.5

.8 

1.8

2.2

1.6 

1.5

.5 

.4

.5 

.5

.5

.4 

.3

a Sum of determined constituents.

b Represents more than 99 percent of runoff for water year October 1950 to September 1951.
COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM--Continued

COLORADO RIVER AT HOT SULPHUR SPRINGS, COLO.--Continued 

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

49

48

47

46

49

49

44

43

44

42

48

49

50

50

48

49

49

50

48

47

48

49

46

45

45

46

46

45

45

44

41

47

Nov.

40

37

38

38

37

39

38

33

34

33

32

34

33

33

34

33

34

33

34

34

34

33

34

32

34

33

33

32

33

32

--

34

Dec.

32

33

32

32

32

33

32

33

32

32

33

32

32

32

33

32

33

32

32

32

32

32

32

32

33

32

32

32

32

32

32

32

Jan.

33

32

32

33

33

32

33

32

32

33

33

33

32

33

33

33

33

32

32

32

33

32

33

33

32

32

32

32

33

32

32

32

Feb.

32

32

33

34

33

34

34

33

34

34

32

33

32

33

32

33

33

33

34

33

33

32

33

34

34

34

32

34

__

__

--

33

Mar.

38

33

32

34

34

35

35

34

35

35

34

34

35

35

36

36

37

36

36

36

37

36

35

37

37

35

36

36

37

35

36

35

Apr.

37

37

36

36

36

37

36

37

37

36

36

37

36

37

37

38

38

37

37

37

38

38

39

38

37

38

38

40

42

42

--

38

May

43

43

44

44

48

46

48

49

47

48

47

48

48

49

48

50

51

50

50

50

51

52

52

51

52

52

53

53

5C

51

51

49

June

51

50

48

51

52

51

52

52

50

51

50

52

52

51

53

52

52

51

52

53

48

49

50

52

51

50

51

52

53

--

51

July

51

52

51

50

52

53

52

51 .

53

52

53

52

53

53

52

53

53

54

55

54

55

58

60

60

59

61

60

60

58

60

61

55

Aug.

61

60

60

59

61

60

58

59

59

58

60

61

58

59

57

58

58

58

58

59

57

58

58

60

54

52

51

50

50

52

50

57

Sept.

48

58

59

58

59

54

52

50

49

46

48

46

45

47

54

55

45

46

47

47

48

46

46

46

45

46

47

45

46

47

--

49
EAGLE RIVER BASIN 

EAGLE RIVER BELOW GYPSUM, COLO.

LOCATION. At bridge on State Highway 301 at Gypsum, Eagle County, just above Gypsum Creek, about 15

Gypsum Creek.

DRAINAGE AREA. 894 square miles (approximately). 

RECORDS AVAILABLE. Chemical analyses: April 1947 to September 1951.

Water temperatures: April 1949 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 1,100 ppm Sept. 21-30; minimum, 126 ppm June 21-30.

Specific conductance: Maximum daily, 1,590 micromhos Sept. 26; minimum daily, 182 micromhos June 

Water temperatures: Maximum, 68°F Aug. 3; minimum, freezing point on several days in January and 

EXTREMES, 1947-51.--Dissolved solids: Maximum, 1,100 ppm Sept. 21-30, 1951; minimum, 108 ppm May 21

Hardness (1947-50): Maximum, 511 ppm Sept. 21-30, 1948; minimum, 78 ppm June 1-10, 1948.

Specific conductance: Maximum daily, 1,850 micromhos Aug. 6, 1949; minimum, 156 micromhos June 4, 

Water temperatures (1949-51): Maximum, 76°F Aug. 24, 1949; minimum, freezing point on many days d

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific cond

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 give

Chemical analyses, in parts per million, water year October 1950 to S

Date of collection

Oct. 5, 7-9, 1950... 

Oct. 11, 14-17 .....

Jan. 1-10, 1951 .. .

Aor. 21-30 ........

Mean 

discharge 

(cfs)

254 

223 

196 

217 

234 

233

217 

214 

188 

180 

189 

186

172 

177 

178 

189 

182 

186

201 

228 

450

Temperature 

(°F)

Silica 

(Si02)

16 

13

10 

11 

11

12

10 

9.5

8.9

Iron 

(Fe)

Calcium 

(Ca)

188 

161

122 

116 

122

120

108 

112

80

Magnesium 

(Mg)

40 

35

28 

27 

28

28

26 

24

11

Sodium 

(Na)

Potassium 

(K)

78 

65

67 

63 

73

72

68 

86

66

Bicarbonate 

(HC03 )

221

177

172 

172 

176

175

161 

168

140

Sulfate 

(SO,)

373 

385 

446 

365 

374 

365

251 

251 

265

260

238 

249

165

Chloride 

(Cl)

99 

117 

109 

106 

107 

106

114 

95 

111

110

102 

119

71

Fluo* 

ride

(F)

Nitrate 

(NO,)

4.0 

2.4

2.0 

1.5 

1.6

1.8

1.5 

1.5

1.3
EAGLE RIVER BASIN Continued

EAGLE RIVER BELOW GYPSUM, COLO. Continued

Chemical analyses, In parts per million, water year October 1950 to September 

Date of collection

May 1-3, 1951 ....

Weighted average.

Mean 

discharge 

(cfs)

412 

728 

1,143 

2,245

1,793 

2,582 

3,213 

2,250 

1,432 

1,006

812 

378 

326 

268 

220 

210

a 654

Temperature 

(°F)

Silica 

(Si02)

8.3

6.1 

6. 2

9.3

10 

16

--

Iron 

(Fe)

Calcium 

(Ca)

31

26 

37

88

123 

220

--

Magnesium 

(Mg)

9.4

5.7 

8.4

17

24 

40

--

Sodium 

(Na)

Potassium 

(K)

30

7.8 

16

50

104 

52

--

Bicarbonate 

(HC03)

86

72 

80

151

199 

233

--

Sulfate 

(S04 )

33 

64

163

274 

517

-

Chloride 

(Cl)

11

8.1 

21

74

130 

68

--

Fluo^ 

ride 

(F)

Nitrate 

(NO,)

1.3

.7 

.6

.9

1.1

2.6

--

Bo

ron 

(B)

a Represents 99 percent of the runoff for the water year October 1950 to September 1951.
EAGLE RIVER BASIN

EAGLE RIVER BASIN--Continued

EAGLE RIVER BELOW GYPSUM, COLO. Continned

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct:

..

._

54

_

_.

_

--

54

56

56

55

55

..

54

54

54

--

50

50

49

48

47

Nov.

..

_

36

36

36

35

35

35

36

36

35

34

33

35

33

34

34

34

35

34

34

34

35

35

34

34

35

35

35

35

Dec.

35

35

34

36

34

34

34

35

37

38

37

38

39

38

36

36

35

36

35

36

35

34

33

34

34

35

33

34

34

33

33

35

Jan.

34

_

_

32

33

32

32

35

33

33

33

33

34

34

34

35

35

36

34

34

35

36

36

38

38

34

32

32

34

Feb.

31

32

33

33

34

35

38

38

36

34

35

35

35

36

37

37

38

38

39

40

37

38

37

37

38

37

38

38

36

Mar.

38

39

38

37

38

39

39

38

39

39

39

34

34

38

39

39

48

41

40

41

35

39

40

42

43

41

44

34

34

43

45

39

Apr.

45

47

50

48

50

49

49

49

48

50

50

49

50

50

49

50

50

51

47

48

49

45

47

50

48

49

48

48

47

47

49

May

46

48

51

51

51

50

53

49

48

49

49

51

49

49

49

50

49

51

50

49

50

45

48

50

50

51

51

49

51

51

51

50

June

48

47

49

50

51

51

47

50

49

51

53

52

50

51

51

53

51

53

52

53

52

53

53

53

52

53

53

53

54

54

--

51

July

56

54

55

55

55

55

53

54

51

51

52

58

50

58

59

61

64

64

65

64

60

60

65

62

64

61

60

65

64

65

67

59

Aug.

66

65

68

60

65

65

65

67

64

60

59

62

64

65

65

65

64

65

66

65

63

64

65

64

56

65

64

65

63

65

64

64

Sept.

54

64

65

60

60

64

54

54

63

62

62

61

60

61

60

53

52

52

51

52

59

59

57

62

61

62

61 "59

57

60

--

59
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER NEAR GLENWOOD SPRINGS, COLO.

LOCATION. At Shoshone power plant, 6 miles upstream from gaging station, which is at power plant at G

mile upstream from Roaring Fork.

DRAINAGE AREA. 4,560 square miles (above gaging station). 

RECORDS AVAILABLE. Chemical analyses: October 1941 to September 1951.

Water temperatures: May 1949 to September 1951. 

EXTREMES, j.950-51. Dissolved solids: Maximum, 606 ppm Oct. 11-31; minimum, 142 ppm June 21-30.

Hardness: Maximum, 292 ppm Oct. 11-20; minimum, 90 ppm June 21-30, July 11-20.

Specific conductance: Maximum daily, 1,110 micromhos Oct. 18, Nov. 3; minimum daily, 199 micromhos 

Water temperatures: Maximum, 69"F July 31; minimum, freezing point Feb. 1-2. 

EXTREMES, 1941-51. Dissolved solids: Maximum, 2,030 ppm Aug. 10, 1947; minimum, 105 ppm June 1-10, 1

Hardness: Maximum, 1,480 ppm Aug. 10, 1947; minimum, 72 ppm June 1-20, 1942.

Specific conductance: Maximum daily, 1,370 micromhos Jan. 20, 1943; minimum daily, 153 micromhos May 

Water temperatures (1949-51): Maximum, 69°F July 31, 1951; minimum, freezing point Feb. 1-2, 1951

REMARKS.--Values reported for dissolved solids are residue on evaporation. Records of specific conduc

at Salt Lake City, Utah. Discharge records for gaging station at Glenwood Springs, for water year 

Paper 1213. No appreciable inflow between sampling point and gaging station except during periods 

Chemical analyses, in parts per million, water year October 1950 to Sep

Date of collection

Oct. 1-10, 1950 . . .

Dec. 11-13, 18 .... 

Dec. 14-17, 19-20..

Jan. 1-10, 1951 ...

Jan. 21, 24-29, 31 . 

Jan. 22-23, 30 b. . . .

Feb. 21-28. ........

Mean 

discharge 

(cfs)

900 

748 

731 

810 

899 

965

795 

861 

1,127 

896 

764 

1,016 

1,200 

846

1,135 

1,039 

842 

990

Temperature 

(°F)

Silica 

(Si02)

12 

12 

13 

12 

12 

13

13 

13 

13 

13 

13 

12 

11 

13

11 

12

13

Iron 

(Fe)

0.02

Calcium 

(Ca)

80 

84 

83 

79 

72 

66

74 

67 

51 

62 

63 

56 

48

50 

54

51

Magnesium 

(Mg)

19 

20 

20 

19 

17 

15

16 

15 

11 

14 

15 

12 

10

12 

13

13

Sodium 

(Na)

83 

90 

93 

81 

74 

64

89 

84 

45 

71 

87 

67 

47

57 

60

52

Potassium 

(K)

Bicarbonate 

(HCO,)

152 

160 

162 

158 

150 

142

154 

141 

121 

137 

140 

125 

114 

129

116 

120 

133 

116

Sulfate 

(S04 )

150 

163 

164 

151 

135 

125

135 

121 

88 

111 

111 

94 

78 

102

84 

93 

111 

85

Chloride 

(Cl)

132 

132 

132 

115 

112 

96

132 

126 

65 

106 

132 

101 

70 

128

85 

87 

130 

75

Fluoi 

ride 

(F)

0.2

Nitrate 

(N03)

0.8 

1.2 

1.2 

1.2 

1.2 

.6

.5 

.6 

.5 

.5 

.6 

.6 

.6 

.7

.8 

.7

.7

B

ro

(B

a Sum of determined constituents.

b Not included for computation of weighted averages.
Mar. 1-4, 7-10.....

June 21-30 ........

Weighted average .

1,034 

750

1,081

3,644

9,564

10,280 

5,983

1,290

d2,586

13

9.8

1 9

1 9

11

47

Op

°.1

00

27

On

39

CO

CO

39

12

7

0

5.5

8 7

13

8.7

51

64

13

13

9.9

19

24

no

54

g

29

116 

132

131

79

124

134

130

130

103

83 

102

34

34

30

25

P.O.

103

56

75 

140

33

*)A

f)r\

1 R

13

11

1 Q

ntj

33

38

92

94

102

41

1.0 

.5

1 2

1 2

.6

Q

Q

 «/

0.8

a Sum of determined constituents.

b Not included for computation of weighted averages.

c Determined by Schwarzenbach method.

d Represents 99 percent of runoff for water year October 1950 to September 1951.
28 COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM.--Continued 

COLORADO RIVER NEAR GLENWOOD SPRINGS, COLO. Continued

Temperature (°F) of water, water year October 1950 to Se

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

Average

Oct.

56

54

53

52

53

54

48

48

49

51

52

54

52

53

54

54

54

54

53

52

52

50

48

48

49

48

48

46

48

45

46

51

Nov.

48

47

46

44

46

44

48

48

41

38

36

36

35

37

40

37

36

38

42

42

42

42

42

42

38

39

36

36

35

36

41

Dec.

38

38

34

34

36

33

33

33

34

38

38

38

37

38

38

38

38

34

34

35

37

36

35

33

33

33

33

33

33

33

33

35

Jan.

33

33

33

33

33

33

33

33

33

33

33

33

33

33

33

33

33

34

33

33

33

33

33

33

34

35

34

35

33

33

33

Feb.

32

32

33

33

33

33

33

33

33

34

33

34

34

33

33

33

33

33

33

33

33

33

33

34

34

34

34

35

33

Mar.

35

36

35

34

35

36

38

39

41

42

42

39

-.

40

41

42

44

40

37

36

36

38

42

40

40

42

42

44

38

40

40

39

Apr.

42

44

46

45

46

45

44

45

42

41

39

40

42

45

47

48

48

50

50

51

51

50

50

50

53

50

50

51

50

45

47

May

46

46

46

49

52

53

52

50

50

49

50

51

50

48

51

52

54

52

54

54

53

53

52

52

52

53

54

54

52

54

52

51

ptember 1951

June

49

50

50

54

52

53

54

52

51

51

50

52

54

54

53

54

54

54

55

54

53

53

54

54

57

57

57

56

56

55

~

53

July

56

57

59

59

58

59

60

60

60

59

61

61

61

61

62

63

61

62

62

65

62

62

63

63

65

65

66

66

66

66

69

62

Aug.

66

65

66

60

65

65

64

64

61

61

61

61

62

65

64

62

61

61

61

61

63

62

62

61

61

60

60

62

61

61

62

Sept.

60

60

62

62

61

61

61

61

57

58

58

54

55

55

54

54

55

56

56

56

53

51

52

55

54

54

54

55

55

"

57
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER NEAR CAMEO, COLO.

LOCATION. At Grand Valley project diversion dam, 3.7 miles upstream from Cameo, Mesa County, 0.4 mile u

from gaging station.

DRAINAGE AREA. 8,060 square miles, approximately (above gaging station). 

RECORDS AVAILABLE. Chemical analyses: October 1933 to September 1951.

Water temperatures: April 1949 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Mavimum daily, 1,760 mirromhos Jan. 11: minimum daily, 257 m

Water temperatures: Maximum, 71°F July 30-31, Aug. 2-3, 7: minimum, free?ing point on many days in J

EXTREMES, 1933-51. Dissolved solids (1933-43): Maximum, 1,050 ppm Der. ?1-31, 1939; minimum, 143 ppm 

Hardness (1933-35): Maximum, 399 ppm July ?1-31, 1934; minimum, 98 ppm June 21-30, 1935.

Specific conductance (1941-51): Maximum daily, 1,850 micromhos Jan. 8, 1944; minimum daily, 244 micro

Water temperatures (1949-51): Maximum, 71°F Aug. 4-6, 1949, July 30-31, Aug. 2-3, 7, 1951; minimum, 

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduct

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given in 

Chemical analyses, in parts per million, water year October 1950 to Sept

Date of collection

Oct. 1-10, 1950 ....

Jan. 1-10, 1951 .... 

Jan. 11-20 ........

Feb. 11-20 ........

Mar. 21-31 ........

Mean 

discharge 

(cfs)

1,740 

1,509 

1,467 

1,561 

1,685 

1,700

1,539 

1,677 

1,565 

1,453 

1,570 

1,668

1,620 

1,575 

1,569 

1,637 

1,616 

1,450 

1.589

Temperature 

(°F)

Silica 

(Si02)

10 

11

10 

12

10

12 

13

Iron 

(Fe)

Calcium 

(Ca)

101 

95

84 

86

74 

76

Magnesium 

(Mg)

30 

26

25 

22

21 

25

Sodium 

(Na)

Potassium 

(K)

180 

153

144 

165

138 

150

Bicarbonate 

(HCOS)

209 

197

186 

198

174

184 

198

Sulfate 

(SO,)

231 

209

188 

182

168 

182

Chloride 

(Cl)

250 

210

195 

220

179

195 

278

Fluoi 

ride 

(F)

Nitrate 

<NOS)

2.2 

3.3

2.8 

3.2

2.7

2.6 

2.7

Boron 

(B)

a Not included for computation of weighted averages 

b Hardness determined by Schwarzenbach method.
COLORADO RIVER MAIN STEM Continued

COLORADO RIVER NEAR CAMEO, COLO. Continued

Chemical analyses, in parts per million, water year October 1950 to Septemb

Date of collection

Apr. 1-10, 1951....

Sept. 21-30 .......

Weighted average .

Mean 

discharge 

(cfs)

1,756 

2,071 

3,789 

4,884 

6,963 

13,820

12,180 

13,590 

17,450 

10,580 

6,817 

5,787

4,876 

2,752 

2,572 

2,103 

1,760 

1,735

4,030

Temperature 

(°F)

Silica 

(SiCg

9.5 

14

8.3 

9.4

9.2 

10

--

Iron 

(Fe)

Calcium 

(Ca)

65 

42

34 

39

62 

79

-

Magnesium 

(Mg)

19 

8.7

8.2 

9.5

16 

19

--

Sodium P°tas- 

,_, x slum 

(Na) (K)

124 

36

19 

38

96 

132

--

Bicarbonate 

(HC03)

158 

123

96 

102

144 

166

--

Sulfate 

(S04 )

141 

52

39 

58

118 

158

-

Chloride 

(Cl)

165 

45

28 

53

132 

184

--

Fluoi 

ride 

(F)

Nitrate 

(N03 )

1.9

.7

1.2 

1.3

2.9 

2.8

--
COLORADO RIVER MAIN STEM

COLORADO RIVER MAIN STEM Continued

COLORADO RIVER NEAR CAMEO, COLO. Continued

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

58

54

54

54

54

55

54

52

53

54

_

55

55

52

54

55

55

54

54

54

53

--

52

51

50

50

50

49

33

Nov.

49

48

47

47

47

48

49

47

44

36

37

37

36

38

39

38

38

38

40

43

43

42

42

42

40

40

42

40

40

39

42

Dec.

40

38

37

35

36

33

34

34

33

36

36

38

37

38

38

38

38

37

_

37

36

36

35

34

34

34

34

34

34

33

33

36

Jan.

34

33

33

33

33

34

33

33

32

32

32

32

32

32

32

32

32

32

33

32

32

32

32

33

33

33

34

32

32

32

33

Feb.

32

_

32

32

32

32

32

32

32

32

33

33

33

33

33

33

33

34

34

34

36

36

39

38

38

37

38

_

_

--

34

Mar.

38

38

36

35

38

40

42

44

44

44

41

40

42

44

45

45

40

38

39

39

42

45

41

42

43

45

47

43

45

45

45

42

Apr.

46

47

47

49

48

50

45

49

49

47

42

44

46

48

49

51

52

52

54

54

54

54

55

54

53

54

51

53

51

49

--

50

May

48

49

50

52

56

57

57

57

56

53

54

55

54

53

54

54

56

56

56

56

56

54

55

55

56

56

56

57

57

54

56

55

June

53

52

53

54

54

54

55

55

51

55

54

56

56

56

58

57

58

58

59

67

57

56

57

60

58

57

59

59

60

56

July

60

62

60

60

62

61

61

63

63

62

64

64

65

65

68

68

68

68

69

69

67

67

66

70

69

70

70

71

71

66

Aug.

71

71

68

68

70

71

69

68

67

68

68

68

68

69

69

68

68

69

68

68

68

69

67

64

64

66

66

65

64

66

68

Sept.

68

66

65

66

65

65

65

65

64

64

63

59

59

60

60

58

59

60

60

60

60

59

57

57

68

58

68

67

59

59

62
GUNNISON RIVER BASIN 

GUNNISON RIVER NEAR GRAND JUNCTION, COLO.

LOCATION. At road bridge about half a mile downstream from gaging station, 1 mile downstream from poi

miles upstream from mouth and Grand Junction, Mesa County. 

DRAINAGE AREA.--8,020 square miles, approximately. 

RECORDS AVAILABLE.--Chemical analyses: October 1931 to September 1951.

Water temperatures: April 1949 to September 1951. 

EXTREMES, 1950-51.--Dissolved solids: Maximum, 2,310 ppm Nov. 1-10; minimum, 360 ppm May 21-22, 24, 2

Hardness: Maximum, 1,150 ppm Nov. 1-10; minimum, 234 ppm May 11-20.

Specific conductance: Maximum daily, 2,680 micromhos Nov. 5; minimum daily, 455 micromhos May 31.

Water temperatures: Maximum, 80°F July 9,0; minimum, freezing point on several days during December 

EXTREMES, 1931-51 . Dissolved solids: Maximum, 2820 ppm Sept. 11-20, 1934 (rev.) ; minimum, 203 ppm M

Hardness (1931-35, 1943-51): Maximum, 1,370 ppm Sept. 1-?0, 1934; minimum, 143 ppm June 1-10, 1933,

Specific conductance (1941-51): Maximum daily, 2,680 micromhos Nov. 5, 1950; minimum daily, 280 mic

Water temperatures (1949-51): Maximum, 80°F July 20, 1951; minimum, freezing point on several days 

REMARKS.--Values reported for dissolved solids are sums of determined constituents. Records of specif

office at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 

Chemical analyses, in parts per million, water year October 1950 to Sep

Date of collection

Oct. 1-10, 1950 ...

Jan. 1-10, 1951 ...

Mar. 21-31 .......

Mean 

discharge 

(cfs)

706 

549 

538 

534 

758 

1,183

1,054 

1,055 

835 

787 

746 

765

671 

979 

853 

839 

876 

969

Temperature 

(°F)

Silica 

(Si02)

19 

20 

19 

19 

20 

19

19 

17 

19 

19 

20 

18

20 

17 

18 

18 

16 

16

Iron 

(Fe)

Calcium 

(Ca)

237 

261 

256 

270 

214 

160

163 

148 

162 

150 

154 

140

142 

136 

133 

125 

114 

99

Magnesium

(MB)

100 

114 

112 

115 

91 

67

71 

66 

71 

64 

68 

64

67 

66 

65 

62 

53 

45

Sodium 

(Na)

183 

226 

228 

229 

167 

144

143 

130 

149 

131 

135 

132

146 

139 

129 

122 

102 

92

Potassium 

(K)

Bicarbonate 

(HCO,)

230 

264 

286 

306 

277 

238

235 

231 

243 

228 

239 

219

235 

222 

216 

208 

197 

185

Sulfate 

(S0<)

1,110 

1,300 

1,240 

1,280 

955 

728

751 

692 

762 

690 

710 

658

682 

666 

640 

609 

521 

449

Chloride 

(Cl)

26 

30 

32 

30 

24 

18

21 

18 

21 

18 

20 

18

19 

20 

18 

17 

15 

14

Fluo* 

ride 

(F)

Nitrate 

(NO,)

9.9 

15 

8.4 

15 

14 

8.1

9.7 

11 

11 

10 

11 

13

12 

12 

11 

8.4 

8.1 

6.5

B

r

(
May 21-22, 24, 26-28,

41 o

Aug. 21, 26-31 .....

Sept. 21-30 .......

Weighted average .

DCD

658

2,202

3,727

7,729

4,926

5,688

5,689

906

1,211

790

755

cl,378

14

15

15

17

17

16

19

21

16

18

17

122

78

66

68

68

60

133

188

167

188

241

114

52

27

17

19

17

21

65

55

66

85

89

43

94

109

53

31

34

34

19

97

145

119

159

157 

165

205

86

179

192

160

154

139

134

123

174

224

216

195 

172

227

178

460

568

268

169

192

187

161

268

550

802

672

816

853 

847

1,130

466

16

21

10

5.0

7.5

6.0

5.5

9.0

14

20

14

22

20 

23

26

13

5.8

4.9

3.4

..

2.5

2.9

3.0

1.1

2.3

2.4

3.8

4.7

1.7

5.5 

4.3

4.9

10

5.4

a Not included for computation of weighted averages.

b Residue on evaporation.

c Represents 82 percent of the runoff for water year October 1950 to September 1951.
COLORADO RIVER BASIN

GUNNISON RIVER BASIN--Continued

GUNNISON RIVER NEAR GRAND JUNCTION, COLO. Continued 

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

64

64

60

61

62

60

61

60

..

60

58

58

59

60

60

60

59

60

58

59

59

57

54

55

54

54

54

59

Nov.

52

52

50

51

50

_

49

49

41

42

38

39

40

42

43

40

42

42

43

43

44

45

46

45

48

_.

41

42

44

40

44

Dec.

39

41

39

44

38

40

38

44

44

40

_

43

41

40

40

39

40

40

41

40

39

36

38

38

--

35

32

32

33

36

33

39

Jan.

35

33

34

32

32

34

32

34

32

33

32

32

33

33

34

33

33

34

34

33

33

33

33

35

34

35

34

_ 

32

32

33

Feb.

32

32

32

33

34

33

33

34

34

34

35

36

34

34

35

39

39

40

41

41

44

43

45

45

_

45

_

_

--

37

Mar.

42

42

44

41

45

50

50

43

50

48

45

43

46

48

44

43

42

48

50

48

50

53

54

52

50

48

48

50

50

50

47

Apr.

47

50

52

53

50

45

50

51

52

54

48

53

53

52

47

51

54

58

57

56

..

58

_

60

60

58

_

58

52

51

--

53

May

51

60

50

55

56

60

57

58

58

57

59

56

53

56

54

59

59

58

58

59

57

58

._

59

--

60

61

60

_

61

57

June

50

62

57

60

58

61

61

61

60

62

60

65

64

63

60

61

66

65

67

66

62

62

62

63

62

65

66

66

68

67

62

July

65

70

78

69

68

71

72

68

70

70

72

73

71

72

73

76

79

80

74

70

72

74

78

74

76

78

76

76

77

73

Aug.

77

76

73

71

73

72

70

71

70

70

73

75

73

74

75

73

72

71

70

70

68

70

69

69

68

70

72

Sept.

71

73

69

70

70

69

69

68

65

65

64

63

60

66

66

68

64

63

63

64

65

64

65

62

62

_

66
DOLORES RIVER BASIN

DOLORES RIVER AT GATEWAY, COLO.

LOCATION. At bridge on State Highway 141, 500 feet upstream from gaging station, which is 0.3 mile no

stream from Colorado-Utah State line. 

DRAINAGE AREA. 4,350 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: October 1947 to September 1951.

Water temperatures: April 1949 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum daily, 8,690 micromhos Dec. 27; minimum daily, 476 

Water temperatures: Maximum, 76°F July 26, 29-30; minimum, freezing point on several days during De

EXTREMES, 1947-51. Dissolved solids (1947-50): Maximum, 4,900 ppm Sept. 11-20, 1950; minimum, 198 pp

Hardness, (1947-50): Maximum, 1,140 ppm Sept. 11-20, 1950; minimum, 130 ppm June 11-15, 17-20, 1948

Specific conductance: Maximum daily, 10,000 micromhos Sept. 22, 1949; minimum daily, 227 micromhos 

Water temperatures (1949-51): Maximum, 78°F Sept. 1, 1949; minimum, freezing point on several days 

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of specif

office at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 

Chemical analyses, in parts per million, water year October 1950 to Sep

Date of collection

Oct. 1-10, 1950 ....

Dec. 1-3, 5-10 ....

Dec 11-14

Dec. 21-26, 30 .... 

Dec. 27-29, 31 ....

Jan. 2-10 ......... 

Ja... 11, 14, 17,19-20 

Jan. 12-13, 18 ..... 

Jan. 21-29, 31 .....

Feb. 1-3, 7-10 ....

Feb. 11-16, 20.....

Mean 

discharge 

(cfs)

68.9 

81.4 

82.3 

87.1 

88.7 

94.3

94.1 

96.0 

118 

125 

89.4 

86.2 

100 

88.3 

120 

125 

138 

120

131 

136 

166 

149 

130

Temperature

Silica 

(SiO,)

7.5 

9.1

8.6 

8.7

11 

11

8.4 

7.4

Iron 

(Fe)

Calcium 

(Ca)

142 

133

128 

148

119 

141

103 

108

Magnesium 

(Mg)

75 

73

66 

64

54 

76

51 

55

Sodium . 

(Na) jRj

729 

925

942 

687

733 

1,240

636 

990

Bicarbonate 

(HCO,)

161 

171

170 

176

196 

208

180 

188

Sulfate 

(SO,)

563 

499

468

575

379 

482

343 

332

Chloride 

(Cl)

1,080 

1,400

1,420 

975

1,100 

1,900

950 

1,520

Fluo* 

ride 

<F)

Nitrate 

(NO,)

9.5 

12

13 

9.2

8.6 

10

5^5 

5.5

B

ro

(B
DOLORES RIVER BASIN Continued

DOLORES RIVER AT GATEWAY, COLO. Continued

Chemical analyses, in parts per million, water year October 1950 to September 

Date of collection

Mar. 1-10, 1951 ..

May 21-23, 26-28... 

May 24-25, 29-31 . .

Sept. 2-7, 9-10 ....

Sept. 21-30 ........

Weighted average .

Mean 

discharge 

(cfs)

112 

130 

121

98.9 

91.2 

133 

166 

165 

285 

590 

507 

774 

1,196

900 

805 

676 

279 

127 

122

268 

174 

108 

268 

404 

126 

99.0 

63.2 

48.2

a218

Temperature 

<°F)

Silica 

(Si02)

7.4 

7.3

10

8.2 

5.0

6.6 

6.8

Iron 

(Fe)

Calcium 

(Ca)

104 

118

70

52 

86

122 

132

-

Magnesium 

(Mg)

53 

73

21

13 

38

42 

41

-

Sodium P°tas- 

(Na % slum 

(Na) (R)

744 

1,040

137

72 

305

327 

526

Bicarbonate 

(HCOS)

179 

167

158

116 

108

128 

128

-

Sulfate 

(S04 )

350 

487

150

104 

298

394 

426

-

Chloride 

(Cl)

1,120 

1,570

192

95 

448

473 

770

-

Fluo4 

ride 

(F)

Nitrate 

(NO,)

6.2 

9.0

1.7

2.5 

4.5

6.6

7.7

--

B

ro

(B

a Represents 99 percent of runoff for water year October 1950 to September 1951.
DOLORES RIVER BASIN 37

DOLORES RIVER BASIN Continued

DOLORES RIVER AT GATEWAY, COLO. Continued

Temperature (°F) of water, water year October 1950 to September 1951

Day

1

2

3

4

5

6

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Average

Oct.

57

50

51

52

51

54

50

51

52

54

54

55

55

53

55

55

53

53

53

51

52

52

52

53

52

52

52

55

51

48

49

52

Nov.

50

48

44

44

44

43

46

45

43

35

34

33

34

40

39

36

38

38

45

44

47

43

41

39

40

38

38

37

36

36

41

Dec.

41

38

34

37

37

32

34

38

40

37

36

36

39

36

36

38

37

34

35

33

32

33

33

34

33

33

32

32

33

32

34

35

Jan.

34

32

33

33

33

32

32

32

33

32

33

33

34

33

33

32

32

33

34

33

33

33

33

36

34

34

37

38

38

32

32

33

Feb.

33

32

34

33

32

34

33

34

34

35

38

38

35

33

34

33

35

37

37

38

37

41

40

41

39

42

38

37

--

36

Mar.

35

36

37

33

40

42

42

44

42

46

40

38

41

44

43

47

41

__

38

44

48

42

42

43

50

45

46

45

46

42

Apr.

49

45

52

51

52

49

54

49

49

42

40

49

50

51

52

58

56

55

53

54

55

57

57

54

52

56

52

47

51

May

50

53

53

55

59

65

63

58

57

58

60

54

55

54

56

57

59

60

62

61

62

60

64

64

68

68

6,6

66

61

63

60

June

62

57

59

60

59

60

61

63

61

62

_

61

62

63

63

66

68

67

66

68

66

66

66

64

66

66

67

69

68

69

--

64

July

70

67

70

68

67

66

72

70

69

70

69

70

69

75

75

72

73

73

75

74

73

69

70

73

73

76

75

74

76

76

74

72

Aug.

75

73

74

73

72

71

71

69

67

72

70

67

70

67

68

68

67

72

69

67

68

67

66

67

67

66

67

67

65

66

69

Sept.

64

64

64

64

63

63

66

65

67

63

62

59

57

58

61

57

58

58

62

60

62

57

57

57

61

60

60

59

59

60

61
DOLORES RIVER BASIN Continued 

DOLORES RIVER NEAR CISCO, UTAH

LOCATION. At gaging station, 9 miles upstream from mouth and 14 miles southeast of Cisco, Grand County. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951.

Sediment records: March to September 1951. 

EXTREMES, 1951. Specific conductance: Maximum daily, 6,760 micromhos Mar. 8; minimum daily, 504 micromh

Water temperatures: Maximum observed 80°F July 19.

Sediment concentrations: Maximum daily, not determined; maximum observed, 127,000 ppm Aug. 22; minimum 

Sediment loads: Maximum daily, 150,000 tons, estimated, Aug. 30; minimum daily, 4 tons Apr. 13 and Jul

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of specific 

fice at Salt Lake City, Utah. Records of discharge for December 1950 to September 1951 given in Water

Chemical analyses, in parts per million, March to September 195

Date of collection

Mai. 8, 11-13, 1951 . 

Mar. 9-10, 14-16, IB19 ................

May 4, 6-7 .........

May 11-18..........

May 22-27...... ....

May 28-31 ..........

June 1-10. ..........

June 11-20. .........

June 21-30. .........

July 1-10....... ....

Aug. 24-28 .........

Sept. 21-30.........

Weighted average. . .

Mean 

discharge 

(cfs)

138

130 

129 

113 

103 

152

183 

249 

586 

512 

719 

1,628 

944 

793 

683

322 

121 

126 

105 

80 

56.2 

34.2

a 347

Silica 

(Si02)

6.9 

6.9

4.0

9.3

11 

9.8 

12 

8.2 

7.4 

7.9

7.4

12

11

7.4

Iron 

(Fe)

Calcium 

(Ca)

123 

109

120

100

66 

76 

62 

60 

52 

50

65

122 

180

132

Magnesium 

(Mg)

62 

52

67

51

22 

20 

14 

12 

16 

14

22

32 

38

40

--

Sodium P°tasltla\ SlUm (Na) (R)

1,040 

671

1,000

448

133 

125 

69 

68 

84 

81

182

302 

229

474

..

Bicarbonate 

(HCO,)

174 

183

178

186 

180 

192 

170 

174 

179 

141 

134 

104

100

180 

136

130

..

Sulfate 

(SOJ

398 

365

473

429 

360 

125 

145 

146 

85 

102 

104 

105

178

321 

563

422

..

Chloride 

(Cl)

1,610 

1,000

1,500

1,400 

645 

135 

178 

175 

90 

88 

112 

116

268

430 

282

690

..

Fluoi 

ride 

(F)

Nitrate 

(NO,)

5.7 

5.8

6.2

3.2 

5.8 

5.1 

3.4 

3.0 

1.3 

1.9 

2.2 

1.7

2.3

6.2 

9.8

6.0

.-

Boron 

(B)

Part

per 

mil

lion

3,3

2,3

3,2

1,7

6

6

4

4

4

4

7

1,3

1,3

1,8

a Analyses represent 70 percent of the runoff for the period December 1950 to September 1951.
DOLORES RIVER BASIN 39

DOLORES RIVER BASIN Continued 

DOLORES RIVER NEAR CISCO, UTAH Continued 

Temperature (°F) of water, March to September 1951

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

_

_

_.

_

._

__

52

53

53

41

42

40

50

45

52

44

44

46

44

54

50

50

50

50

50

53

50

51

50

50

--

Apr.

54

55

56

52

54

53

55

55

55

55

57

57

55

55

63

53

66

--

64

60

65

55

62

61

60

61

61

56

53

52

--

57

May

56

56

55

59

60

60

65

65

63

60

60

60

54

60

55

65

66

64

64

65

67

65

70

68

67

61

63

62

June

57

54

56

63

62

64

60

62

62

65

62

79

65

70

72

73

73

72

66

68

70

72

70

70

76

76

72

72

73

67

~

67

July

69

71

_

_

73

75

73

75

75

72

72

70

74

73

74

77

76

80

78

76

77

70

74

76

78

77

_

--

Aug.

_

_.

_.

--

..

_.

--

_.

--

_

75

75

77

78

78

75

76

71

75

70

64

69

70

70

70

64

65

-.

__

--

--

Sept.

65

65

70

62

68

70

72

72

71

73

65

55

66

67

67

68

52

68

_

64

63

59

_

60

65

63

56

57

59

60

--

64
40 COLORADO RIVER BASIN

DOLORES RIVER BASIN Continued

DOLORES RIVER NEAR CISCO, UTAH--Continued

Suspended sediment, March to September 1951

Day

19

11

1ft

on

oe

9ft

on

11

Total4 * -

17 

18 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

January

Mean

discharge

(cfs)

127 

119 

123 

107 

104

107 

123 

115 

107 

101 

104 

95 

92 

92 

88 

92 

98 

111 

127 

135

143 

143 

143 

139 

139

162 

157 

162 

157 

172

3,684

Suspended sediment

Mean 

concentration 

(Ppm)

Tons 

per 

day

April

90 

85 

79 

94 

99

64 

61 

60 

170 

250 

100 

22 

16 

35 

60 

82 

50 

50 

61 

65

80 

120 

75 

100 

100

9u 

90 

59 

66 

74

--

31 

27 

26 

27 

28

18 

20 

19 

49 

68

28 

6 

4 

9 

14 

20 

13 

15 

21 

24

31 

46 

29 

38 

38 

39 

38 

26 

28 

34

814

February

Mean

charge

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

May

188 

193 

183 

172 

183

256 

320 

434 

592 

579

565 

504 

504 

541 

579 

565 

456 

384 

394 

394

414 

579 

761 

835 

717

647 

776 

1,600 

1,760 

1,620 

1,530

19,225

100 

100 

89 

70 

100

210 

300 

600 

1,130 

1,180 

1,090 

960 

950 

924 

900 

820 

490 

422 

400 

400 

400 

1,310 

1,690 

1,700 

1,480 

1,180 

1,020 

11,200 

9,850 

8,750 

5,550

51 

52 

44 

33 

49

145 

259 

a 703 

1,810 

1,840

1,660 

1,310 

1,290 

1,350 

1,410 

1,250 

603 

438 

a426 

a 426

a 447 

2,050 

3,470 

3,830 

2,870

2,060 

2,140 

48, 400 

46, 800 

38, 300 

22,900

188,416

March

Mean

charge

(cfs)

115 

107 

111

139 

152 

147 

143 

139

143 

135 

135 

131 

115

115 

131 

139 

135 

135

123 

123 

135 

139 

123 

119

3,129

Suspended sediment

Mean 

concentration 

(ppm)

140 

80 

53

190 

200 

107 

120 

100

98 

105 

100 

150 

198

149 

110 

100 

159 

90 

36 

120 

80 

58 

80 

87

--

Tons 

per 

day

43 

23 

16

71 

82 

42 

46 

38

38 

38 

36 

53 

61

46 

39 

38 

58 

33

12 

40 

29 

22 

27 

28

959

June

1,490 

1,440 

1,210 

978 

776

634 

640 

660 

750 

860

978 

962 

776 

702 

647 

606 

620 

761 

866 

1,010 

1,030 

914 

914 

746 

675

541 

541 

517 

480 

468

24,192

3,250 

2,000 

1,450 

680 

480

300 

260 

330 

330 

550

470 

390 

254 

170 

136 

110 

250 

320 

460 

460

390 

280 

180 

120 

63

63 

61 

67 

68 

110

--

13, 100 

7,780 

4,740 

1,800 

1,010

514 

449 

588 

668 

1,280

1,240 

1,010 

532 

322 

238 

180 

418 

658 

1,080 

1,250

1,080 

691 

444 

242 

115

92 

89 

94 

88 

139

41,931

a Computed from estimated concentration graph.
DOLORES RIVER BASIN 

DOLORES RIVER BASIN Continued 

DOLORES RIVER NEAR CISCO, UTAH Continued 

Suspended sediment, March to September 1951 Continued

41

Day

g

g

ID

22

23

25

27

no

29

30 

31 ......

Total -

July

Mean

charge

(cfs)

456 

414 

364 

354 

336

304 

279 

250 

244 

224

198 

183 

162 

152 

127

123 

123 

107 

111 

107

119 

127 

139 

139 

135

131 

107 

95 

115 

111 

127

5,963

Suspended sediment

Mean 

concentration 

(ppm)

79 

50

13

24 

16 

23 

25 

28

55 

24 

50 

40 

60

90 

73 

144

--

Total discharge for period (cfs 

Total load for period (tons) . . .

Tons 

per 

day

97 

56 

b45 

b40 

b35

b30 

b25 

b20 

b!8 

b!5

b!2 

blO 

b8 

b6 

4

8 

5 

7 

7 

8

18 

8 

19 

15 

22

32 

21 

37 

b24 

b22 

b32

706

August

Mean

charge

(cfs)

127 

115 

183 

412 

364

230 

167 

152 

157 

139

127 

115 

107 

9R 

85

82 

79 

76 

74 

76

218 

188 

230 

147 

172

104 

107 

98 

349 

711 

492

5,781

Suspended sediment

Mean 

concentration 

(ppm)

80 

60 

80 

90

100 

90 

75 

80 

100

2,080 

7,850 

8,500 

3,000 

4,000

1,280 

904 

770

Tons 

per 

day

b32 

b24 

blOO 

b 1,200 

b850

b200 

b75 

b60 

b65 

b33

b32 

25 

17 

21 

21

22 

19 

15 

16 

21

si, 400 

s6,440 

5,280 

1,190 

1,860

359 

261 

204 

b 50, 000 

b 150, 000 

b 50, 000

269, 842

September

Mean

charge

(cfs)

198 

119 

100 

95 

92

90 

90 

85 

80 

76

72 

69 

67 

69 

67

53 

47 

43 

40 

35

35 

34 

32 

33 

39

36 

32 

31 

34 

36

1,929

Suspended sediment

Mean 

concentration 

(PPm)

15,000 

13,000 

7,000 

4,000 

1,760

400 

340 

290 

227 

230

167 

130 

124 

100 

100

47 

65

--

Tons 

per 

day

8,020 

4,180 

1,890 

1,030 

437

97 

83 

67 

49 

47

32 

24 

22 

19 

18

5 

6

16,098

63, 903 

c 518, 766

s Computed by subdividing day.

b Computed from water-sediment discharge curves.

c Includes estimated loads for missing days.
DOLORES RIVER BASIN Continued 

DOLORES RIVER NEAR CISCO, UTAH Continued

Particle-size analyses of suspended sediment, May to August 

(Methods of analysis: B, bottom withdrawal tnbe; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

May 7, 1951 ............

May 27 .................

June 1. .................

Aug. 22 ................

Aug. 23 ................

Time

3:30 p.m. 

6:40 a. m. 

6:00 a. m. 

11:30 a.m. 

3:50 p. m. 

8:00 a. m. 

6:40 p. m. 

8:00 a. m.

Water 

discharge 

(cfs)

336 

661 

1,530 

761 

237 

143 

224 

230

Suspended sedim

Concentration 

of sample 

(ppm)

357 

655 

3,480 

406 

1,430 

2,950 

11,000 

3,640

Concentration 

of suspension 

analyzed 

(ppm)

786 

725 

4,040 

695 

2,020 

3,390 

2,280 

4,015

Percent finer 

0.002

68 

48

0.004

71 

68 

42 

54 

56 

64 

76 

81

0.008

77 

62

0.016

90 

91 

65 

70 

92 

98 

97 

95

0.
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER NEAR CISCO, UTAH

LOCATION. At gaging station, 1 mile downstream from Dolores River, 11 miles south of Cisco, Grand Cou

DRAINAGE AREA. 24,100 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: August 1928 to September 1951.

Water temperatures: April 1949 to September 1951.

Sediment records: May 1930 to September 1951. 

EXTREMES, 1950-51 . Dissolved solids: Maximum, 1,820 ppm Oct. 12, 17-20; minimum, 295 ppm June 21-30.

Hardness: Maximum, 828 ppm Oct. 12, 17-20; minimum, 170 ppm June 21-30.

Specific conductance: Maximum daily, 2,370 micromhos Oct. 20; minimum daily, 396 micromhos May 31.

Water temperatures: Maximum observed, 76°F July 16, 28, 31; minimum, freezing point Jan. 6-7, 9.

Sediment concentrations: Maximum daily, 30,000 ppm Aug. 30; minimum daily, 20 ppm Nov. 5, Dec. 20, 

Sediment loads: Maximum daily, 559,000 tons Aug. 29; minimum daily, 84 tons Apr. 16. 

EXTREMES, 1928-51 . Dissolved solids: Maximum, 2,670 ppm Aug. 11-20, 1940; minimum, 202 ppm June 11-2

Hardness (1928-35, 1943-51): Maximum, 1,090 ppm Sept. 1-10, 1934; minimum, 132 ppm June 11-20, 1933

Specific conductance (1941-51): Maximum daily, 4,100 micromhos Sept. 30, 1946; minimum daily, 340 m

Water temperatures (1949-51): Maximum observed, 81°F Aug. 5, 1949; minimum, freezing point on sever

Sediment concentrations (1930-51): Maximum daily, 50,300 ppm Sept. 24, 1931; minimum daily, 14 ppm 

Sediment loads (1930-51): Maximum daily, 2,790,000 tons Oct. 14, 1941; minimum daily, 84 tons Apr. 

REMARKS.--Values reported for dissolved solids are residue on evaporation. Records of specific conduc

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million, water year October 1950 to Septe

Date of collection

Oct. 1, 9-10, 1950 ..

Nov. 1-10 ..........

Nov. 11-20 .........

Dec. 11-20 .........

Jan. 1-10, 1951.....

Feb. 10-19 .........

Mar. 2, 6, 8-10..... 

Mar. 11-20.........

Mean 

discharge 

(cfs)

2,183 

1,932 

1,954 

2,173 

2,825 

3,137

2,687 

3,010 

2,495 

2,369 

2,279 

a 2, 753

2,973 

2,722 

2,700 

2,639 

2,607

Temperature 

<°F)

Silica 

(Si02)

12 

12 

11 

12 

15 

14

14 

13 

14 

15 

16

12 

14 

15 

14 

11

Iron 

(Fe)

0.03

Calcium 

(Ca)

165 

187 

180 

160 

155 

142

137 

125 

121 

122 

124

100 

108 

108 

100 

97

Magnesium 

(Mg)

79 

88 

84 

71 

66 

56

59 

53 

55 

56 

56

44 

45 

46 

43 

44

Sodium 

(Na)

220 

244 

253 

244 

204 

1

205 

188 

195 

218 

226

178 

181 

189 

173 

169

Potassium 

(K)

35

Bicarbonate 

(HCO,)

202 

228 

236 

232 

232 

226

232 

222 

216 

221 

229

196 

206 

209 

196 

190

Sulfate 

(S04)

755 

872 

810 

690 

638 

565

575 

517 

484 

489 

486

402 

409 

432 

391 

380

Chloride 

(Cl)

185 

200 

220 

220 

190 

165

195 

180 

190 

228 

235

188 

205 

193 

176 

187

Fluo^ 

ride 

(F)

Nitrate 

(NO,)

8.6 

9.5 

9.6 

11 

7.9 

7.8

8.0 

7.8 

8.2 

8.7 

9.7

8.8 

6.6 

6.4 

6.3 

6.3

B

ro

(B

a Not included for computation of weighted averages.
COLORADO RIVER MAIN STEM--Continued

COLORADO RIVER NEAR CISCO, UTAH--Continued 

Chemical analyses, in parts per million, water year October 1950 to September 

Date of collection

Apr. 1-10, 1951 ....

July 11, 13, 15-16,20 

July 22-36, 31 ......

Sept 1-10

Weighted average . .

Mean 

discharge 

(cfs)

2,520 

1,924 

4,268 

a 5, 024 

10,160 

a 19, 900

17,810 

18,330 

23,010 

12,180 

7,342 

6,582

5,048 

2,662 

3,425 

2,750 

1,733 

2,086

b5,152

Temperature 

(°F)

Silica 

(Si02)

13 

10 

15

14

18 

16 

16 

15 

15 

17

15 

14 

15 

14 

14 

12

15

Iron 

(Fe)

Calcium 

(Ca)

100 

104 

83

58

52 

52 

48 

52 

65 

90

101 

131 

177 

154 

184 

180

85

Magnesium 

(Mg)

43 

46 

32

19

14 

15 

12 

16 

24 

29

36 

56 

59 

59 

80 

80

32

Sodium 

(Na)

164 

189 

110

50

34 

34 

28 

43 

65 

81

109 

155 

174 

183 

228 

217

99

Potassium 

(K)

Bicarbonate 

(HCOS )

190 

186 

174

132

134 

128 

118 

112 

130 

149

170 

180 

208 

204 

208 

208

159

Sulfate 

(S04 )

377 

422 

252

142

111 

120 

99 

144 

214 

298

342 

549 

677 

614 

818 

790

291

Chloride 

(Cl)

169 

197 

111

42

26 

25 

24 

39 

56 

62

96 

125 

134 

138 

175 

163

90

Fluo" 

ride 

(F)

Nitrate 

(NOS )

6.5 

6.5 

5.0

4.1

1.7 

1.9 

1.4 

1.8 

2.5 

4.1

4.0 

6.7 

6.3 

6.7 

9.4 

10

4.3

B

r

(B

a Not included for computation of weighted averages.

b Represents 74 percent of the runoff for water year October 1950 to September 1951,
COLORADO RIVER MAIN STEM 45

COLORADO RIVER MAIN STEM Continued

COLORADO RIVER NEAR CISCO, UTAH Continued 

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

61

58

..

56

59

60

58

56

57

58

57

52

52

52

50

52

50

--

Nov.

52

--

50

50

51

50

49

44

35

34

36

34

40

45

..

42

--

46

47

50

43

41

42

39

46

44

43

44

Dec.

40

39

37

41

38

35

37

40

38

37

41

39

38

36

38

40

40

37

39

38

36

36

33

37

37

35

--

35

38

Jan.

35

33

34

33

34

32

32

33

32

--

34

33

33

39

40

33

--

--

..

--

--

..

--

"

--

Feb.

_

41

-.

_

--

--

35

34

34

35

36

35

35

36

33

34

36

40

40

41

43

40

--

Mar.

46

34

43

--

49

45

45

46

43

47

41

47

44

46

44

46

46

44

43

49

49

46

52

51

49

49

48

48

46

Apr.

50

51

50

54

54

55

50

55

55

50

54

50

51

53

55

58

58

55

55

55

60

60

59

55

54

53

59

56

54

54

May

52

49

51

55

54

62

60

--

..

60

55

54

53

60

60

61

61

60

57

56

62

65

65

64

61

60

56

58

June

58

55

54

58

60

60

61

60

62

61

59

63

66

62

62

60

65

64

65

62

60

63

65

62

65

65

66

--

62

July

65

68

70

70

70

72

72

72

73

70

73

76

74

73

75

74

71

72

70

73

74

76

65

Aug.

75

75

74

72

71

..

--

73

--

..

70

73

71

71

74

73

73

70

70

70

69

69

64

65

65

70

67

65

66

70

Sept.

67

--

65

64

67

70

65

65

70

64

65

62

64

65

66

64

63

66

66

64

63

--

--

64

63

60

60

64

63

--

65
46 COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM Continued

COLORADO RIVER NEAR CISCO, UTAH Continued

Suspended sediment, water year October 1950 to September 1951

Day

12

10

20

OQ

25

27

no

31 

Total-

, 1 

g

7 

8 

Q

12

13 

15 

16 

17 

18 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

October

Mean

charge

(cfs)

2,350 

2,220 

2,200 

2,400 

2,370

2,320 

2,300 

2,190 

2,110 

2,090 

1,980 

1,700 

1,820 

1,990 

1,770

1,780 

1,800 

2,140 

1,980 

2,040

1,990 

1,980 

1,860 

1,980 

1,960

2,010 

1,700 

1,780 

2,040 

2,090 

2,200

63,140

Suspended sediment

Mean 

concentration 

(ppm)

332 

300 

270 

260 

240

210 

180 

140 

110 

100

100 

110 

120 

130 

120

110 

100 

140 

100 

100

90 

90 

80 

70 

60

60 

50 

50 

45 

45 

55

--

Tons 

per 

day

2,110 

a 1,800 

a 1,600 

a 1,680 

a 1,540

al,320 

a 1,120 

a 828 

627 

564

a 535 

505 

a 590 

a 698 

a 573

a 529 

486 

809 

535 

551

484 

481 

402 

a 374 

318

326 

230 

240 

248 

a 254 

a 327

22,684

January

2,640 

2,690 

2,400 

2,300 

2,370

2,730 

2,490 

2,200 

2,070 

1,800

1,780 

2,190 

2,200 

2,250 

2,300

2,270 

2,250 

2,350 

2,500 

2,700 

2,700 

2,780 

2,800 

2,780 

2,810 

3,010 

3,140 

2,980 

3,030 

2,500 

2,000

77,010

54 

56 

48 

54 

50

58 

33 

42 

52 

50

68 

110 

78 

80 

82

94 

160 

160 

160 

119 

137 

110 

100 

130 

130

130 

140 

130 

140 

130 

140

385 

407 

311 

335 

320

428 

222 

249 

291 

a 243

327 

650 

463 

a 486 

509

576 

972 

al,020 

1,080 

868 

999 

a 826 

756 

976 

a 986 

a 1,060 

al,190 

a 1,050 

al,150 

a 878 

a756

20,769

November

Mean

charge

(cfs)

1,930 

2,110 

2,040 

2,140 

2,030 

2,300 

2,440 

2,200 

2,200 

2,340

2,500 

2,690 

2,690 

2,830 

2,590 

2,920 

2,900 

2,810 

2,940 

3,380

3,570 

3,250 

3,230 

3,550 

3,470

3,080 

2,850 

2,990 

2,740 

2,640

81,350

Suspended sediment

Mean 

concentration 

(ppm)

45 

50 

35 

30 

20

50 

110 

70 

60 

40

30 

40 

70 

70 

70 

90 

80 

70 

1,100 

5,430

1,500 

400 

270 

260 

190

100 

150 

400 

210 

236

Tons 

per 

day

234 

a 285 

193 

a 173 

110 

310 

725 

416 

297 

253

202 

291 

508 

535 

490

a 710 

626 

531 

a8,730 

49,600

14,500 

3,510 

2,530 

2,490 

1,780

832 

1,150 

a3,230 

1,550 

1,680

98,291

February

1,600 

1,400 

1,600 

1,900 

2,300

2,950 

3,300 

3,600 

3,300 

3,200

3,300 

3,400 

3,250 

3,000 

2,750

2,650 

2,570 

2,740 

2,760 

2,960 

2,660 

2,500 

S.680 

2,800 

2,730

2,810 

2,800 

2,560

76,180

140 

146 

200 

200 

200

1,050 

750 

500 

400 

300

260 

250 

232 

212 

149

168 

236 

200 

172 

175 

161 

220 

150 

130 

128

148 

140 

140

--

a 605 

552 

864 

a 1,030 

a 1,240

8, 360 

a 6,680 

a 4, 860 

a 3,560 

2,590 

2,320 

2,300 

2,040 

1,720 

1,110

1,200 

1,640 

a 1,480 

1,330 

1,400 

1,160 

1,480 

1,090 

983 

943 

1,120 

a 1,060 

a 968

55,685

December

Mean

charge

(cfs)

2,660 

2,800 

2,740 

2,810 

2,660 

2,520 

2,520 

2,520 

2,590 

3,050

3,070 

3,070 

2,960 

2,800 

2,850

3,190 

3,260 

3,250 

2,990 

2,680

2,740 

2,830 

2,760 

2,560 

2,450 

2,420 

2,280 

2,220 

2,250 

2,470 

2,470

84,420

Suspended sediment

Mean 

concentration 

(ppm)

200 

200 

150 

100 

60

30 

25 

45 

80 

70

107 

99 

80 

70 

50

60 

85 

50 

60 

20

42 

72 

80 

40 

40

30 

30 

30 

35 

45 

26

--

Tons 

per 

day

1,440 

1,510 

al,110 

759 

431

204 

170 

306 

559 

576

887 

821 

639 

529 

385

517 

748 

439 

484 

144

311 

550 

596 

276 

a 265

196 

185 

180 

213 

300 

173

15.903

March

2,440 

2,660 

2,660 

2,640 

2,760

2,640 

2,320 

2,640 

2,710 

2,850

2,800 

2,830 

2,810 

2,560 

2,450 

2,800 

2,710 

2,540 

2,610 

2,280 

2,300 

2,400 

2,760 

2,730 

2,620 

2,520 

2,520 

2,570 

2,740 

2,900 

2, 620

81,390

280 

320 

250 

200 

100

80 

60 

160 

610 

600

374 

366 

350 

200 

150

111 

88 

60 

50 

40 

35 

30 

35 

55 

61

50 

41 

47 

100 

180 

152

1,840 

a2,300 

al,800 

al,430 

745

570 

376 

1,140 

4,460 

4,620 

2,830 

2.80C 

2,660 

1,380 

992

839 

644 

411 

352 

246 

217 

194 

261 

405 

432

340 

279 

326 

740 

1,410 

1,080

38,119

a Computed from estimated concentration graph.
COLORADO RIVER MAIN STEM 47

COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER NEAR CISCO, UTAH Continued 

Suspended sediment, water year October 1950 to September 1951 Continued

Day

5 

if _ _ ._ 

10 

1 fl

91

99

O4

on

30 

31 

Total1 

2 

5 

7 

8- 

10- 

11- 

12 

13 

14 

19

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

April

Mean

discharge

(cfs)

2,620 

2,620 

2,490 

2,250 

2,220

2,500 

2,830 

2,710 

2,590 

2,370

1,950 

1,960 

1,800 

1,700 

1,640 

1,560 

1,640 

1,960 

2,390 

2,640

2,900 

3,170 

3,950 

3,760 

3,680

4,510 

5,080 

5,230 

4,970 

5,430

87, 120

Suspended sediment

Mean 

concentration 

(ppm)

114 

131 

126

60 

60

210 

220 

110 

110 

80

55 

40 

40 

30 

20 

20 

25 

30 

100 

100

110 

138 

171 

297 

430

500 

900 

1,170 

870 

800

--

Tons 

per 

day

806 

927 

847 

364 

360

1,420 

1,680 

805 

769 

512

290 

212 

194 

138 

89 

84 

alll 

159 

645 

713

861 

1,180 

1,820 

3,020 

4,270

6,090 

12,300 

16,500 

11,700 

11,700

80, 566

July

16,600 

15,700 

14,000 

13,600 

13,400

12,700 

11,400 

10,900 

10, 500 

9,750

9,040 

8,030 

7,460 

7,100 

6,640

6,340 

6,080 

«,400 

7,000 

7,230

7,180 

6,880 

7,530 

7,300 

6,690

5,970 

5,250 

4,870 

5,190 

5,060 

5,120

266,910

160 

120 

110 

130 

210

220 

230 

200 

130 

180

168 

100 

80 

60 

50

110 

150 

105 

190 

1,490

3,080 

700 

1,830 

1,390 

370

257 

200 

310 

675 

820 

710

--

7,170 

a 5, 090 

a4,160 

a4,770 

7,600

7,540 

7,080 

5,890 

3,690 

4,740

4,100 

2,170 

1,610 

al,150 

896

1,880 

2,460 

1,810 

3,590 

29, 100 

59,700 

13,000 

37, 200 

27,400 

6,680 

4,140 

a 2, 640 

a 4, 080 

a 9, 460 

a 11, 200 

a 9, 820

292,016

May

Mean

charge

(cfs)

6,220 

5,850 

5,170 

4,430 

3,950

4,190 

5,360 

7,430 

9,270 

9,690

9,630 

9,720 

10,300 

10, 500 

10,400 

9,360 

9,040 

9,780 

11,000 

11,900

14,300 

15,900 

16,300 

16, 200 

16,600

16, 600 

18,000 

22,100 

27,400 

29, 100 

26,400

382,090

Suspended sediment

Mean 

concentration 

(ppm)

980 

950 

570 

260 

190

320 

400 

680 

1,110 

1,200

1,220 

1,250 

1,250 

1,110 

900 

720 

550 

551 

1,300 

1,800

2,820 

2,820 

2,080 

1,400 

1,340

1,500 

1,360 

1,510 

3,400 

4,000 

1,850

Tons 

per 

day

16, 500 

15,000 

7,960 

3,110 

2,030

3,620 

5,790 

a 13, 600 

a 27, 800 

a31,400

a31,700 

32,800 

34,800 

31,500 

25, 300 

18,200 

13,400 

14, 500 

a 38, 600 

a 57, 800

109,000 

121,000 

91,500 

61,200 

60, 100

67,200 

66, 100 

90, 100 

252,000 

a 314, 000 

132,000

1,789,610

August

4,890 

4,810 

4,870 

5,780 

7,720

6,860 

6,060 

5,500 

4,890 

4,470

4,050 

3,700 

3,280 

2,590 

2,440

2,340 

2,200 

2,110 

1,980 

1,930

2,150 

2,370 

2,760 

2,980 

3,010

2,740 

2,690 

2,620 

5,410 

6,640 

4,300

120, 140

410 

450 

600 

3,200 

3,500 

3,300 

1,330 

610 

360 

300 

250 

210 

189 

170 

250

250 

100 

60 

59 

57 

730 

1,590 

980 

838 

720

820 

820 

630 

22,400 

30, 000 

16.800

5,410 

5,840 

7,890 

49,900 

73,000

a 61, 100 

a 21, 800 

a 9, 060 

4,750 

a3,620

a 2, 730 

2,100 

1,670 

1,190 

1,650

1,580 

594 

342 

315 

297

4,240 

10, 200 

7,300 

6,740 

5,850

6,070 

5,960 

4,460 

s 559, 000 

538,000 

195,000

1,597,658

June

Mean

charge

(cfs)

25,500 

24,900 

21,500 

18,200 

15,700

14,200 

13,400 

18, 800 

15,100 

15,800

16,200 

16,000 

14,700 

14, 300 

15,000 

16,000 

18,200 

22,000 

25,100 

25,800

27,700 

28,400 

28,800 

25,400 

21,900

20, 500 

20,700 

20,200 

19,000 

17,500

591,500

Suspended sediment

Mean 

concentration 

(ppm)

700 

1,050 

1,100 

915 

500

500 

400 

400 

240 

190

310 

400 

300 

192 

200 

200 

210 

940 

1,150 

1,560

1,980 

1,130 

1,100 

770 

470

200 

174 

350 

420 

230

Tons 

per 

day

48, 200 

70,600 

63,900 

45,000 

21,200

19,200 

a 14, 500 

14,900 

9,780 

8,110

13,600 

17,300 

11,900 

7,410 

8,100 

8,640 

10,300 

55,800 

77,900 

109,000

148,000 

86,600 

a 85, 500 

52,800 

27,800

11,100 

9,720 

a 19, 100 

21,500 

10,900

1,108,360

September

4,800 

3,700 

3,250 

2,900 

2,600 

2,400 

2,110 

1,980 

1,920 

1,840

1,750 

1,590 

1,630 

1,560 

1,630

1,750 

1,750 

1,840 

1,870 

1,960

2,060 

1,990 

1,990 

2,140 

2,190

2,140 

2,010 

1,950 

2,030 

2,470

65, 800

8,000 

4,200 

2,000 

800 

540

340 

269 

266 

200 

169

180 

180 

160 

108 

100

100 

56 

67 

80 

64 

140 

66 

80 

80 

90

96 

53 

50 

125 

970

104,000 

a 42, 000 

a 17, 600 

6,260 

3,790

2,200 

1,530 

1,420 

1,040 

840

850 

773 

704 

455 

440

472 

265 

333 

404 

339

779 

355 

a 430 

462 

532

555 

288 

263 

685 

6,470

196,534

Total discharge for year (cfs-days) 

Total load for year (tons) .........

1,977,050

5,316,195

s Computed by subdividing day.

a Computed from estimated concentration graph.
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER NEAR CISCO, UTAH Continued

Particle-size analyses of suspended sediment, April to Augu

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Apr. 25, 1951 ..........

May 23 ................

Aug 5

Aug. 22 ................

Aug. 29 ................

Aug. 30 ...............

Time

5:00 p. m. 

7:55 a.m. 

6:40 a. m. 

10:30 a. m. 

1:00 p.m. 

11:15 a.m. 

7:00 p. m. 

6:45 a. m.

6:30 p.m. 

4:00 p.m. 

8:00 a. m. 

9:45 a.m. 

2:45 p.m. 

6:20 p.m. 

5:10 p.m.

Water 

discharge 

(cfs)

3,780 

10,300 

16,600 

25,400 

22,900 

28,700 

6,380 

7,100

4,870 

6,270 

7,850 

2,300 

7,660 

10, 900 

7,030

Suspended sedim

Concentration 

of sample 

(ppm)

666 

1,030 

1,850 

1,100 

650 

865 

880 

2,370

455 

1,810 

1,720 

948 

29, 100 

45,700 

19, 800

Concentration 

of suspension 

analyzed 

(ppm)

1,480 

1,480 

2,380 

1,490 

1,270 

865 

1,930 

2,320

663 

2,620 

612 

1,880 

2,880 

2,320 

1,960

Percent finer 

0.002

30 

17 

17 

22 

20

45

0.004

37 

23 

23 

25 

24

50 

62

49 

51 

11 

71 

51 

41 

35

0.008

46 

25 

31 

35 

26

58

0.016

54 

36 

38 

40 

37

75 

95

63 

75 

28 

85 

78 

71 

80

0.0
GREEN RIVER BASIN 

GREEN RIVER NEAR GREEN RIVER, WYO.

LOCATION. At bridge on Green River-Linwood highway, about 1 mile upstream from gaging station near Gre

mile downstream from Bitter Creek, 1 mile southeast of Green River, and 4 miles upstream from high-w

DRAINAGE AREA. 10,000 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: May to September 1951. 

Water temperatures: May to September 1951. 

Sediment records: May to September 1951.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduct

Salt Lake City, Utah. Records of discharge from April to September 1951 given in Water-Supply Paper 

Chemical analyses, in parts per million, May to September 195

Date of collection

May 11-20 ..........

Mav 21 31

June 11-20 ..........

July 11-20......... ..

Aug. 1-10......... ..

Aug. 21-31.. ........

Sept. 21-30... .......

Mean 

discharge 

(cfs)

3,102 

4,151 

7,904 

9,885 

7,122 

9,601

6,480 

5,384 

5,227 

4,910 

3,063 

2,290

1,976 

1,365 

1,262

Silica 

(SiO,)

10 

9.6

9!l 

8.1

7.8 

6.5 

7.3

7.3 

6.8 

7.9

Iron 

(Fe)

0.01 

.01 

.02 

.04 

.02 

.03

.02 

.03 

.03

Calcium 

(Ca)

52 

41

35 

36 

35 

36 

36 

42

45 

47 

52

Magnesium 

(Mg)

16 

14

12 

13 

13 

12 

13 

15

16 

19 

20

Sodium 

(Na)

19

1

12 

13 

14 

14 

18 

24

29 

32 

38

Potassium 

(K)

--

4

2.7 

3.0 

3.4 

2.9 

1.6 

1.9

1.9 

2.1 

2.9

Bicarbonate 

(HCO,)

204

169

148 

152 

149 

145 

135 

151

158 

158 

168

Sulfate 

(S04)

71

46

37 

40 

43 

47 

62 

85

101 

121 

142

Chloride 

(Cl)

4.2

3.2

2.4 

2.6 

3.0 

3.2 

2.8 

4.0

5.0 

6.0 

6.0

Fluo* 

ride 

(F)

--

--

0.3 

.3 

.3 

.3 

.3 

.2

.2 

.2 

.2

Nitrate 

(NO,)

0.3

.3

4.5 

4.2 

4.7 

4.5 

.4 

.6

.6 

.2 

.2

Boron 

(B)

P

p

m

l
50 COLORADO RIVER BASIN

GREEN RIVER BASIN Continued

GREEN RIVER NEAR GREEN RIVER, WYO.--Continued

Temperature (°F) of water, May to September 1951

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

Average

Oct. Nov. Dec. Jan. Feb. Mar. Apr. May

_

_.

_

57

55

50

54

53

53

54

57

48

53

50

47

47

58

48

53

54

52

55

57

57

56

57

59

59

57

57

54

June

54

44

48

47

52

54

55

55

55

54

55

57

56

57

59

62

62

61

60

60

59

59

57

57

58

59

59

60

60

60

--

56

July

61

61

63

65

64

64

62

64

64

63

59

60

61

64

64

66

65

66

67

67

66

.-

66

66

68

70

67

70

67

70

70

65

Aug.

70

69

69

68

66

67

66

63

62

62

62

63

61

61

61

61

64

62

63

64

62

63

61

62

64

61

61

60

61

59

59

63

Sept.

58

58

59

57

57

59

59

59

58

56

56

54

60

62

--

64

64

62

57

58

56

47

46

56

52

52

48

49

50

54

56
GREEN RIVER BASIN

GREEN RIVER BASIN Continued 

GREEN RIVER NEAR GREEN RIVER, WYO. Continued 

Suspended sediment, May to September 1951

Day

5 -----

g

g

15 

16 

1 ft

19

99

23 

24

Oft

27 

28

30 

31 -

Total2

g

12 

15 

16 

17 

18

19

20 

21 

22 

23 ----- 

24 

25 ----- 

26 

27 

28 

29 ----- 

30 ----- 

SI 

Total

April

Mean

discharge

(cts)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

July

6,960 

6,900 

6,740 

6,450 

6,170

6,140 

6,320 

6,450 

6,380 

6,290

6,170 

6,080 

6,290 

6,170 

5,490

5,000 

4,720 

4,800 

4,600 

4,720

4,920 

5,600 

6,080 

6,050 

5,710 

5,120 

4,780 

4,620 

4,780 

4,920 

4,920

176,140

112

140 

130 

120 

95

85 

80 

78 

73 

80

67 

73 

70 

69 

82

90 

91 

103 

91 

80

67 

95 

165 

123 

80 

67 

70 

55 

61 

60 

69

--

2,100 

2,610 

2,370 

2,090 

1,580

,410 

,370 

,360 

,260 

,360 

1,120 

1,200 

1,190 

1,150 

1,220

1,210 

1,160 

1,280 

1,130 

1,020

890 

1,440 

2,710 

2,010 

1,230 

926 

903 

686 

787 

797 

917

42,486

May

Mean

charge

(cfs)

3,680 

3,450 

3,040 

2,700 

2,490

2,440 

2,860 

3,410 

3,680 

3,730

3,730 

3,800 

4,020 

4,400 

4,380

4,280 

4,140 

4,140 

4,190 

4,430 

4,950 

5,430 

5,820 

6,200 

6,580

7,150 

8,050 

8,780 

9,680 

11,500 

12,800

159,930

Suspended sediment

Mean 

concentration 

(ppm)

50

80 

150 

216 

253 

226 

294 

199 

280 

435 

400 

300 

380 

310 

212 

220

470 

680 

664 

590 

580

600 

664 

540 

510 

530 

455

--

Tons 

per 

day

e2,000 

el, 300 

e800 

e500 

336

527 

1,160 

1,990 

2,510 

2,280

2,960 

2,040 

3,040 

5,170 

4,730

3,470 

4,250 

3,470 

2,400 

2,630

6,280 

9,970 

10,400 

9,880 

10,300

11,600 

14,400 

12, 800 

13,300 

16, 500 

15,700

178,693

August

4,820 

4,750 

4,750 

5,000 

5,120

5,330 

5,230 

4,950 

4,700 

4,450

4,210 

3,850 

3,500 

3,220 

2,990

2,860 

2,740 

2,580 

2,420 

2,260 

2,210 

2,240 

2,300 

2,460 

2,560 

2,490 

2,420 

2,280 

2,120 

2,030 

2,080

104, 920

65 

45 

38 

180 

510 

190 

96 

71 

50 

43

40 

40 

50 

49 

58

48 

37 

39 

29 

30 

21 

31 

50 

70 

140 

70 

40 

25 

24 

24 

60

--

846

577 

487 

2,430 

7,050

2,730 

1,360 

949 

634 

517

455 

416 

472 

426 

468

371 

274 

272 

189 

183

125 

187 

310 

465 

968 

471 

261 

154 

137 

132 

337

24,653

June

Mean

charge

(cfs)

13, 100 

13, 500 

13, 500 

12,600 

11,000

9,260 

7,760 

6,700 

5,910 

5,520

5,120 

5,020 

5,000 

5,250 

5,800

6,640 

7,570 

8,720 

10,200 

11,900

12, 200 

12, 200 

11,900 

11,000 

10,100

8,980 

8,140 

7,500 

7,060 

6,930

266,080

Suspended sediment

Mean 

concentration 

(ppm)

518 

326 

370 

277 

224

279 

232 

197 

181 

220

200 

195 

130 

120 

175

210 

270 

380 

400 

270

258 

235 

240 

175 

130

150 

137 

154 

124 

123

Tons 

per 

day

18,300 

11,900 

13,500 

9,420 

6,650

6,980 

4,860 

3,560 

2,890 

3,280

2,760 

2,640 

1,760 

1,700 

2,740 

3,760 

5,520 

8,950 

11,000 

8,680

8,500 

7,740 

7,710 

5,200 

3,550

3,640 

3,010 

3,120 

2,360 

2,300

177,980

September

2,190 

2,510 

2,280 

2,120 

2,010

1,900 

1,770 

1,730 

1,650 

1,600

1,510 

1,440 

1,400 

1,390 

1,380

1,360 

1,340 

1,300 

1,280 

1,250 

1,240 

1,240 

1,240 

1,270 

1,280 

1,290 

1,270 

1,260 

],2oO 

1,270

46,030

250 

390 

1,120 

240 

129

35 

16

13 

14

9

1,480 

2,640 

6,890 

1,370 

700

166 

63

47 

47

31

14,715

Total discharge for period (cfs-days). 

Total load for period (tons)..........

e Estimated.

753,100

438,500
GREEN RIVER BASIN Continued 

GREEN RIVER NEAR GREEN RIVER, WYO. Continued

Particle-size analyses of suspended sediment, May to Septemb

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S, 

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

May 29 .................

June 11....... ..........

July 1 ..................

July 9 ..................

July 21 .................

Aug. 19 ................

Aug. 29 ................

Sept. 9 ................

Time

10:30 a. m. 

9:15 a. m. 

9:00 a. m. 

9:20 a. m. 

9:45 a. m. 

9:15 a.m. 

7:45 a.m.

9:30 a. m. 

7:15 a. m. 

8:30 a.m. 

7:45 a. IP. 

7:15 a.m.

Water 

discharge 

(cfs)

3,750 

9,460 

5,150 

12,200 

0,960 

6,380 

4,880

4,750 

4,450 

2,440 

2,140 

1,670

Suspended sedim

Concentration 

of sample 

(ppm)

315 

376 

130 

237 

148 

82 

59

39 

50 

22 

26 

25

Concentration 

of suspension 

analyzed 

(ppm)

Percent finer t

0.002 0.004 0.008 0.016 0.0
GREEN RIVER BASIN Continued 

BLACKS FORK NEAR GREEN RIVER, WYO.

LOCATION.--At county highway bridge about 75 yards downstream from gaging station, which is 200 feet 

upstream from mouth, and 12.5 miles southwest of Green River, Sweetwater County. 

DRAINAGE AREA. 3,670 square miles. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951 . Dissolved solids: Maximum, 1,730 ppm Sept. 21-22, 24-30; minimum

Hardness: Maximum, 730 ppm Sept. 21-22, 24-30; minimum, 164 ppm May 21, 28-29, 31.

Specific conductance: Maximum daily, 2,330 micromhos Sept. 29-30; minimum daily, 482 micromhos Jun

Water temperatures: Maximum, 74°F July 23.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific condu

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million,. March to September 

Date of collection

Mar. 13-17, 19-20,

1951 ...........

Mar. 21-24, 26-31

Apr. 2-7, 9-10 ....

Apr. 11-14,16-20 ..

Apr. 21, 23-28, 30.

May 1-5, 7-10 ....

May 11-12, 14-19..

May 21, 28-29, 31 .

May 22-26 ........

June 1-2, 4-9 .....

June 11-16, 18-20..

June 21-23, 25-30 .

July 2-3, 5-7, 9-10.

July 11-14, 16-20..

July 23-24, 27-29,31 

Aug. 1 a ..........

Aug. 2-3, 6-10 ...

Aug. 4 a ..........

Aug. 11, 13-18, 20

Aug. 21-23, 25, 27-3] 

AUK. 24 a ........

Mean 

discharge 

(cfs)

180

67iJ

999

1,019

927

847

1,239

2,578

1,880

2,085

926

917

359

147

206 

412

395

821

154

109 

189

Silica 

(SiOz)

10

13

11

9.6

12

12

13

15

15

14

13

14

13

12

17 

22

32

39

12

12

20

Iron 

(Fe)

0.05

.15

.09

.05

.04

.03

.04

.05

.03

.06

.05

.05

.06

. 07

.09

.03

-_

.03

.03

Calcium 

(Ca)

101

64

58

58

62

69

58

44

63

64

78

80

100

112

116

90

__

104

110

Magnesium 

(Mg)

39

20

22

19

19

22

17

13

20

19

23

25

37

47

46

29

__

47

50

Sodium 

(Na)

111

86

55

32

34

39

34

47

64

48

65

70

115

157

208

170

--

157

165

Potassium 

(K)

10

7.6

6.4

5.2

8.6

8.0

10

6.6

7.4

2.6

2.6

4.0

4.4

4.8

5.4

5.8

__

4.2

5.8

Bicarbonate 

(HCO,)

269

211

212

214

226

246

219

191

232

224

241

250

261

243

242 

256

272

329

227

208 

201

Sulfate 

(S04 )

324

188

140

95

92

112

91

81

140

117

170

188

347

509

578 

745

389

84

493

553 

554

Chloride 

(Cl)

70

44

35

19

23

27

18

19

36

25

35

35

50

62

94 

91

59

24

61

60 

30

Fluoride 

(F)

0.2

.2

.4

.4

.2

.2

.2

.3

.2

.2

.2

.4

.5

.4

.6

.7

-_

.6

.5

Nitrate 

(NO,)

1.1

.7

.8

1.5

1.1

.6

.8

.9

1.2

.4

.3

.5

.6

.4

.6 

2.0

1.2

.8

.8

1.0 

1.2

Boron 

(B)

P

m

l

1

1

1

1

a Not included for computation of weighted averages, 

b Determined by Schwarzenbach method.
GREEN RIVER BASIN Continued 

BLACKS FORK NEAR GREEN RIVER, WYO. Continued 

Chemical analyses, in parts per million, March to September 1951 C

Date of collection

Sept. 1, 5-8, 10, 1951 

Sept. 4 a .........

Sept. 11-15, 17-20. 

Sept. 21-22, 24-30. 

Weighted average

Mean 

discharge 

(cfs)

89.2 

149 

35.0 

22.8

C691

Silica 

(Si02)

11 

15 

11 

8.9

13

Iron 

(Fe)

0.04

.13 

.10

0.06

Calcium 

(Ca)

108

132 

156

68

Magnesium 

(Mg)

46

64 

83

22

Sodium 

(Na)

197

226 

260

63

Potassium 

(K)

5.2

8.0 

6.8

6.0

Bicarbonate 

(HCO,)

202 

191 

211 

205

226

Sulfate 

(SO,)

603 

279 

745 

933

162

Chloride 

(Cl)

70 

36 

90 

106

32

Fluo* 

ride 

(F)

0.6

.6 

.6

0.3

Nitrate 

(NO,)

1.1 

1.3 

.5 

.3

0.8

Boron 

(B)

P

p

m

li

1,

1,

1,

a Not included for computation of weighted averages.

b Determined by Schwarzenbach method.

c Represents 74 percent of the runoff for water year October 1950 to September 1951.
GREEN RIVER BASIN 55

GREEN RIVER BASIN Continued 

BLACKS PORK NEAR GREEN RIVER, WYO. Continued 

Temperature (°F) of water, March to September 1951

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

..

_.

_

33

33

33

32

34

36

34

34

34

33

33

"

34

33

35

33

38

37

Apr.

_

38

44

44

44

44

47

38

39

38

42

44

46

48

48

48

50

50

 t9

49

48

48

48

47

47

46

--

45

May

41

41

42

48

51

_

50

50

52

50

54

55

51

51

46

50

52

54

52

53

55

56

56

56

61

61

59

52

June

57

49

51

54

51

52

56

57

"

_

60

60

64

65

61

66

62

62

62

60

61

61

61

61

62

61

59

59

July

_

63

65

65

66

67

__

64

58

59

68

68

68

69

69

70

70

64

74

69

_

67

68

67

65

71

Aug.

69

65

69

63

66

66

64

62

62

65

64

62

62

62

62

62

64

63

65

61

59

60

_

60

58

57

58

61

63

Sept.

60

58

58

61

60

59

57

55

48

49

52

51

62

63

57

58

49

49

49

50

50

48

52

53

66

55
GREEN RIVER BASIN Continued

HENRYS FORK AT LINWOOD, UTAH

gagl °g station ' which is in Sweetwater County, 300 feet north 

^UNAGE'AREA°--531 Iqufre^iler fr°

RECORDS AVAILABLE. Chemical analyses: March to September 1951

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951 . Dissolved solids: Maximum, 1,330 ppm Sept. 21-30; minimum, 445 ppm 

Hardness: Maximum, 806 ppm Sept. 21-30; minimum, 305 ppm May 27-31.

Specific conductance: Maximum daily, 1,750 micromhos July 17; minimum daily 492 micromhos Mav 30

Water temperatures: Maximum, 65 °F July 28.

REMARKS --Values reported for dissolved solids are residue on evaporation. Records of specific conduct

Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given in W

Chemical analyses, in parts per milUon, March to September 19

Date of collection

Mar. 13-20, 1951 . .

Sept. 21-30 .......

Weighted average. .

Mean 

discharge 

(cfs)

42.4 

71.3 

61.4 

44.0 

47.5

31.7 

28.6 

99.2 

329 

234 

200 

156

58.4 

6.4 

78. 5 

79.0 

134 

31.9 

46.7

53.8 

19.9 

16. E

d78. 8

Silica 

(Si02)

19 

21 

21 

21 

22

24 

24 

29 

25 

21 

22 

22

25 

27 

28 

33 

30 

24 

26

25 

23 

24

24

Iron 

(Fe)

0.05 

.10 

.04 

.04 

.04

.06 

.05 

.06 

.13 

.10 

.09 

.04

.03 

.05 

.05

.14 

.08 

.03

.03 

.03 

.04

0.08

Calcium 

(Ca)

149 

125 

116 

124 

134

153 

152 

126 

81 

86 

80 

84

111 

168 

148

109 

128 

128

133 

154 

168

107

Magnesium 

(Mg)

78 

64 

62 

67 

76

89 

90 

63 

25 

36 

31 

35

49 

82 

58

40 

56 

55

59 

83 

94

48

Sodium 

(Na)

75 

70 

66 

68 

79

68 

77 

71 

24 

33 

31 

36

53 

97 

65

49 

60 

55

66 

90 

92

49

Potassium 

(K)

12 

13 

8.0 

8.4 

11

9.4 

10 

8.6 

6.4 

6.8 

8.8 

7.6

10 

13 

13

8.4 

8.2 

7.2

8.4 

8.4 

9.2

8.6

Bicarbonate 

(HCOS )

281 

260 

260 

270 

295

285 

263 

261 

205 

217 

226 

229

253 

306 

287 

297 

268 

260 

274

252 

274 

280

246

Sulfate 

(S04 )

540 

446 

412 

439 

507

587 

617 

450 

170 

230 

191 

225

344 

653 

480 

470 

284 

409 

389

450 

604 

681

328

Chloride 

(Cl)

42 

35 

32 

37 

42

48 

52 

34 

11 

16 

14 

16

24 

44 

26 

25 

18 

26 

25

27 

41 

45

23

Fluo* 

ride 

(F)

0.2 

.3 

.3 

.3 

.2

.4 

.4 

.4 

.3 

.4 

.5 

.5

.5 

.6 

.6

.6 

.5

.5

.5 

.5 

.5

0.4

Nitrate 

(NO,)

0.9 

1.4 

.7 

.4 

.2

.4 

.6 

1.2 

.7 

.7 

2.9 

3.2

2.9 

2.4 

3.0 

1.2 

1.4 

.5 

1.1

.5 

.4 

.3

1.5

Boron 

(B)

P

p

m

li

a Sum of determined constituents.

b Not included for computation of weighted averages.

c Determined by Schwarzenbach 

d Represents 69 percent of the r
GREEN RIVER BASIN 57

GREEN RIVER BASIN--Continued 

HENRYS FORK AT LINWOOD, UTAH, Continued

Temperature (°F) of water, March to September 1951 

/Once-daily temperature measurement at approximately 7 a. m77

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

ooAO

29

30

31

Average

Oct. Nov. Dec. Jan. Feb. Mar.

_

_

34

34

34

34

33

33

33

33

34

34

33

33

33

34

34

34

33

38

36

Apr.

35

36

39

39

39

42

40

40

42

39

36

38

40

44

42

39

44

45

45

45

43

40

44

46

43

47

43

45

46

44

42

May

39

40

40

46

47

53

48

48

46

50

52

44

49

48

48

52

50

56

53

52

54

54

52

53

56

56

52

55

55

50

June

50

44

45

48

50

51

51

52

52

46

52

55

54

57

59

59

55

54

55

54

51

54

55

55

55

56

56

56

55

53

July

56

58

56

59

58

58

59

58

58

57

56

54

57

59

61

62

62

61

62

63

62

58

59

62

60

62

63

65

64

61

64

60

Aug.

62

63

64

61

60

61

60

56

56

57

58

58

58

56

56

57

56

58

59

61

58

55

56

55

54

55

54

56

56

55

58

58

Sept.

52

54

53

52

52

54

54

55

54

50

54

45

46

48

50

48

47

51

50

52

48

46

46

47

46

46

44

46

46

48

49
GREEN RIVER BASIN--Continued 

YAMPA RIVER NEAR MAYBELL, COLO.

LOCATION. At county bridge 1 mile north of Maybell, Moffat County, and about 3J miles downstream from 

DRAINAGE AREA. 3,410 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: November 1950 to September 1951.

Water temperatures: November 1950 to September 1951.

Sediment records: December 1950 to September 1951. 

EXTREMES, November 1950 to September 1951. Dissolved solids: Maximum, 322 ppm Mar. 1-10; minimum, 72 

Hardness: Maximum, 184 ppm Mar. 1-10; minimum, 45 ppm June 21-30, July 1-10.

Specific conductance: Maximum daily, 571 micromhos Mar. 7; minimum daily, 97.5 micromhos June 21.

Water temperatures: Maximum observed, 81°F July 30; minimum, freezing point on several days during D

Sediment concentrations: Maximum daily, 6,000 ppm July 22; minimum daily, 2 ppm Jan. 21 to Feb. 4.

Sediment loads: Maximum daily, 20,100 tons July 22; minimum daily, 1 ton Jan. 21 to Feb. 4.

REMARKS.--Prior to Jan. 30, 1951, samples were collected at bridge on U.S. Highway 40, 100 feet upstrea

solids are residue on evaporation. Records of specific conductance of daily samples available in di

discharge for water year October 1950 to September 1951 given in Water Supply Paper 1213. No apprec

Chemical analyses, in parts per million, November 1950 to September 19

Date of collection

Nov. 29-30, Dec. 1-10,

Jan. 1-10, 1951. ......

Mar. 11-20. ..........

June 21-30 ...........

Mean 

discharge 

(cfs)

257 

330 

227 

224 

246 

234

258 

269 

278 

499 

509 

585

1,097 

1,318 

3,141 

3,402 

5,017 

7,440

5,114 

5,274 

5.508

Silica 

(Si02)

13 

13 

13 

15 

15 

14

14 

13 

13 

12 

12 

11

13 

15 

13 

13 

12 

11

11 

9.1

8.9

Iron 

(Fe)

0.03 

.04 

.04 

.04 

.04 

.03

.02 

.05 

.05 

.06 

.05 

.07

.11 

.10 

.10 

.09 

.19 

.16

.15 

.11 

.11

Calcium 

(Ca)

39 

37 

41 

42 

40 

39

40 

39 

42 

47 

41 

40

42 

39 

31 

26 

19 

16

14 

13 

11

Magnesium 

(Mg)

17 

16 

17 

17 

17 

16

17 

17 

17 

16 

15 

16

17 

14 

10 

8.3 

6.1 

5.0

4.6 

4.6 

4.2

Sodium 

(Na)

37 

36 

42 

42 

38 

37

40 

41 

40 

40 

34 

35

31 

22 

14 

9.7 

5.8 

4.8

5.5 

5.2 

4.6

Potassium 

(K)

3.4 

3.1 

2.6 

3.3 

3.1 

3.D

3.2 

3.7 

3.5 

5.6 

4.3 

4.3

4.6 

4.6 

5.4 

3.6 

3.8 

3.2

2.7 

2.9 

2.7

Bicarbonate 

(HCO,)

173 

166 

183 

191 

186 

182

182 

176 

183 

175 

165 

166

159 

146 

120 

104 

80 

66

60 

58 

52

Sulfate 

(S0«)

70 

67 

73 

72 

68 

67

70 

81 

83 

94 

78 

86

94 

68 

45 

31 

17 

14

14 

13 

9.5

Chloride 

(Cl)

22 

20 

26 

27 

21 

22

24 

23 

24 

21 

17 

15

10 

8.2 

4.0 

3.5 

1.8 

1.2

2.0 

1.8 

1.8

Fluoride 

(F)

0.4 

.4 

.4 

.4 

.4 

.3

.3 

.3 

.3 

.2 

.5 

.4

.4 

.5 

.6 

.6 

.6 

.6

.6 

.6 

.6

Nitrate 

(NO,)

0.1 

.4 

.3 

.3 

.3 

.6

.8 

.4 

.3 

.6 

.8 

.7

3.3 

3.4 

2.5 

1.7 

.9 

1.0

.8 

.7 

.8

Boron 

(B)

Pa

p

m

li
July 11-20. ...........

Weighted average. . . . a 1,622 11

f\Q

03

0.12 21 7.2 11

2.0

3.4 86

47

27

21

5.0

.5

.5

.3

.3

.3

0.6

.6

.7

.9

.8

.8

1.1

a Represents 97 percent of runoff for water year October 1950 to September 1951.
60 COLORADO RIVER BASIN

GREEN RIVER BASIN Continued 

YAMPA RIVER NEAR MAYBELL, COLO.--Continued 

Temperature (°F) of water, November 1950 to September 1951

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

Average

Oct. Nov.

..

_

_

--

_

36

37

--

--

Dec.

36

36

35

34

35

32

34

34

35

34

35

34

36

34

36

35

35

34

35

36

36

34

35

35

34

35

35

34

34

35

33

35

Jan.

33

33

34

33

33

33

33

32

33

32

33

32

32

33

33

33

33

34

34

32

33

33

33

34

34

34

34

33

32

33

33

33

Feb.

32

33

34

34

34

34

34

34

34

35

37

36

33

33

34

33

34

34

33

33

35

35

36

35

34

34

34

33

34

Mar.

34

34

33

35

35

34

35

36

35

33

33

35

35

36

40

31

34

35

36

39

43

40

42

44

44

45

42

42

45

42

45

38

Apr.

48

50

51

50

48

45

48

47

46

44

44

46

50

50

50

52

49

49

52

50

48

51

50

50

53

50

50

51

50

48

49

May

47

47

52

54

55

58

53

53

53

55

56

54

54

52

52

56

55

55

54

55

53

55

57

55

57

55

55

56

57

56

56

54

June

55

51

51

52

55

57

57

57

57

56

58

59

60

61

67

58

61

59

69

55

52

60

56

61

62

68

62

60

61

63

--

59

July

63

64

66

66

66

67

67

68

66

67

69

70

71

75

70

74

70

71

72

70

71

73

77

78

77

77

80

77

81

79

71

Aug.

79

78

75

70

74

75

--

71

74

72

71

72

72

70

74

75

71

77

73

67

74

71

74

70

70

70

65

73

70

70

72

Sept.

70

73

69

70

68

71

70

68

70

62

59

62

62

65

68

67

50

62

58

63

57

56

61

58

58

60

55

62

62

--

63
GREEN RIVER BASIN 61

GREEN RIVER BASIN Continued 

YAMPA RIVER NEAR MAYBELL, COLO. Continued 

Suspended sediment, December 1950 to September 1951

Day

1 

------

3 ......

4 ......

s ......

6 ......

7 ......

g___

g_ _ _ _

10 

11 ......

j2_ _ _ _

13 ......

U ......

15 . 

16 ---

17 

1 j,O*----- ft

19 ......

20 

21 ......

22 

23 -

24 

25 

O£ £v~ ---

27 

oofiO------

2Q_ _ _ 

30 

31 .. .

Total1 .. .

2 

3 __ __

4 ......

5 ......

6 

7 ......

8 ------ 

g ..... . 

10 . 

11 .. . 

12 ------ 

13 ...... 

14 

15 

16 

17 ...... 

18 

jg _ _ __

20 

21 

22 

23 ----- - 

24 

25 ------ 

26 

27-- - 

28 

29 

30 - 

31 ......

TotalCtetober

Mean

discharge

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

January

220 

210 

220 

230 

240

235 

230 

210 

225 

225

255 

240 

220 

220 

260

250 

245 

250 

255 

260

230 

265 

260 

260 

255

240 

240 

235 

220 

200 

170

7,275

9

9 

4 

2

) '

6

6 

3

1 

1

113

November

Mean

discharge

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

February

145

190 

250 

270 

290

310 

290 

280 

270 

280

290 

295 

265 

245 

240

250 

280 

280 

280 

285

255 

265 

260 

285 

280

285 

295 

295

7,505

1 '

6

4 

5

1 

5

3

4

104

December

Mean

discharge

(cfs)

298 

321 

285 

240 

262

125 

170 

254 

254 

290

366 

390 

370 

357 

352

362 

316 

228 

232 

330

294 

208 

215 

230 

236

236 

228 

190 

210 

230 

225

8,304

Suspended sediment

Mean 

concentration 

(PPm)

7 

7 

7

Tons 

per 

day

5 

6 

4

154

March

280 

310 

290 

320 

430

550 

660 

772 

688 

688

640 

583 

530 

452 

474 

474 

518 

491 

474 

458

442 

565 

583 

595 

565

547 

608 

674 

654 

589 

614

16,518

1 '

600 

2,800 

2,290 

1,760 

1,160

550 

360 

300 

290 

185

170 

173 

100 

60 

65

102 

200 

150 

290 

180

140 

100 

110 

178 

100 

50

~

5

891 

4,990 

4,770 

3,270 

2,150

950 

567 

429 

354 

237

218 

242 

133 

77 

80

122 

305 

236 

466 

275

207 

164 

200 

314 

159 

83

21,914
62 COLORADO RIVER BASIN 

GREEN RIVER BASIN Continued 

YAMPA RIVER NEAR MAYBELL, COLO. Continued 

Suspended sediment, December 1950 to September 1951 Continued

Day

1 A

22

23

28i~ 

31 ......

Total2

g

21 .... 

22 ----- -

23 

24 

25 

26 

27 . 

28 ------ 

29 

30 ... 

31 

Total

April

Mean

charge

(cfs)

654 

779 

800 

863 

1,060

1,150 

1,330 

1,450 

1,630 

1,250

1,060 

870 

772 

709 

950

1,450 

1,400 

1,560 

1,890 

2,520 

2,860 

3,350 

2,960 

2,740 

3,050

3,570 

3,410 

3,220 

3,050 

3,200

55, 557

Suspended sediment

Mean 

concentration 

(ppm)

30 

53

71 

100 

180

220 

210 

200 

410 

210

100 

47 

64 

27 

50

100 

130 

150 

200 

500

520 

580 

300 

190 

400

620 

370 

130 

115 

170

July

3,980 

3,550 

3,470 

3,180 

3,160

3,050 

2,740 

2,640 

2,430 

2,140

1,940 

1,730 

1,660 

1,480 

1,320 

1,160 

1,090 

1,070 

1,100 

1,020

977 

1,240 

1,680 

1,240 

968

863 

779 

716 

751 

765 

709

54, 598

38 

33 

31 

25 

23

18

10

10 

6,000 

700 

150

20

Tons 

per 

day

53 

111 

153 

233 

515

683 

754 

783 

1,800 

709

286 

110 

133 

52 

128

392 

491 

632 

1,020 

3,400

4,020 

5,250 

2,400 

1,410 

3,290

5,980 

3,410 

1,130 

947 

1,470

41^745

408 

31b 

290 

215 

196

111

32

a 26 

c 20, 100 

3,180 

a 502

43

26, 646

May

Mean

charge

(cfs)

3,360 

3,240 

2,990 

2,570 

2,350

2,630 

3,470 

4,190 

4,630 

4,590

4,390 

4,460 

4,910 

4,860 

4,500

4,320 

5,580 

5,930 

5,400 

R, 820

6,680 

7,280 

6,990 

7,490 

7,590

7,300 

6,940 

6,870 

7,730 

8,460 

8,510

166,030

Suspended sediment

Mean 

concentration 

(ppm)

160 

141 

90 

63 

65

80 

360 

453 

380 

250

180 

183 

250 

300 

350

400 

490 

320 

180 

160

190 

270 

240 

330 

130

93 

96 

95 

118 

250 

200

Tons 

per 

day

1,450 

1,230 

727 

437 

412

568 

3,370 

5,090 

4,750 

3,100

2,130 

2,200 

3,310 

3,940 

4,250

4,670 

7,380 

5,120 

2,620 

2,510

3,430 

5,310 

4,530 

6,670 

2,660

1,830 

1,800 

1,760 

2,460 

5,710 

4,600

100,024

August

688 

674 

681 

660 

723 

765 

793 

674 

654 

608

553 

508 

480 

436 

405 

370 

339 

321 

294 

285

272

299 

357 

370 

366

362 

380 

339 

334 

375 

362

14,718

1 "

150 

180

77

25

54 

18 

33

1-

130 

250 

600 

600

63

310 

a 385

121

24

40 

14 

32

144

a 119 

a225 

c608 

586

4,104

June

Mean

charge

(cfs)

8,120 

8,020 

6,500 

4,910 

4,050

3,550 

3,540 

3,920 

4,190 

4,340

4,390 

4,100 

3,710 

4,100 

4,610

5,040 

5,780 

6,650 

7,180 

7,180

7,320 

7,040 

6,570 

5,780 

5,140

4,930 

4,970 

4,730 

4,500 

4,100

158,960

Suspended sediment

Mean 

concentration 

(ppm)

140

110 

71 

76 

80

68 

60 

75 

80 

82

57 

50 

100 

80 

60 

69 

100 

140 

90 

110

140 

130 

90 

80 

98

95 

100 

80 

60 

37

Tons 

per 

day

3,070 

2,380 

1,250 

1,010 

875

652 

573 

794 

905 

961

676 

554 

1,000 

886 

747

939 

1,560 

2,510 

1,740 

2,130 

2,770 

2,470 

1,600 

1,250 

1,360

1,260 

1,340 

1,020 

729 

410

39,421

September

496 

447 

370 

330 

294

272 

249 

228 

208 

186

172 

162 

156 

159 

165 

168 

162 

156 

156 

150 

162 

176 

179 

182 

186

182 

172 

165 

165 

176

6,431

150 

80 

38 

150 

130 

70 

74 

42 

130 

175

70 

15 

15 

17 

95 

60 

50

21 

18

--

20 1 

a 97 

3f 

13* 

10? 

5' 

50 

2> 

73 

8'

3) 

7 

6 

7 41? 

27 

22

9 

9

1,122

Total discharge for period (cfs-days). 

Total load for period (tons)..........

49 5,89 > 

', 235, 347

a Computed from estimated concentration graph.

c Computed from partly estimated concentration graph.
GREEN RIVER BASIN Continued 

YAMPA RIVER NEAR MAYBELL, COLO. Continued

Particle-size analyses of suspended sediment, April to Augus

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Aug. 6..................

Time

5:30 p.m. 

5:30 p.m. 

6:30 p.m.

Water 

discharge 

(cfs)

2,620 

8,090 

800

Suspended sedi

Concentration 

of sample 

(ppm)

420 

114 

381

Concentration 

of suspension 

analyzed 

(ppm)

880

913

Percent finer 

0.002

69

63

0.004

72

72

0.008

80

80

0.016

91

89

0
GREEN RIVER BASIN Continued 

LITTLE SNAKE RIVER NEAR LILY, COLO.

LOCATION. About 2 miles upstream from gaging station, which is 6 miles north of Lily, Moffat County, 

DRAINAGE AREA. 3,730 square miles (above gaging station).

RECORDS AVAILABLE. Chemical analyses: December 1950 to August 1951.

Water temperatures: December 1950 to August 1951. 

EXTREMES, December 1950 to August 1951.--Dissolved solids: Maximum, 644 ppm Aug. 9-10, 16-17, 24-25; 

Specific conductance: Maximum daily, 1,530 micromhos July 20; minimum daily, 154 micromhos June 1.

Water temperatures: Minimum, freezing point on many days during December to March.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific condu

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million, December 1950 to Augus

Date of collection

Dec. 5-11, 1950 ... 

Dec. 12-20 ........

Jan. 1-10, 1951 ...

Feb. 1-3, 10 ......

Feb. 21-28 ........

Mar. 11-20 ........

May 11-20 .......

June 2-10 ........

Mean 

discharge 

(cfs)

60.3 

83.1 

69.3 

54.4 

62. 3 

64.8

74.8 

146 

186 

175 

206 

324 

370

408 

441 

942 

1,318 

2,036 

2,504

2,850 

1.681

Silica 

(Si02)

21 

19 

22 

23 

23 

21

20 

16 

15 

17 

14 

16

18 

19 

22 

22 

18 

16

12 

18

Iron 

(Fe)

0.02 

.03 

.02 

.02 

.02 

.03

.06 

.03 

.04 

.04 

.03 

.05

.10 

.05 

.02 

.02 

.02 

.04

.08

Calcium 

(Ca)

65 

50 

66 

63 

56 

51

51 

42 

40 

41 

49 

49

50 

48 

40 

38 

31 

29

26

Magnesium 

(Mg)

20 

15 

18 

19 

16 

13

12 

11 

8.3 

12 

12 

13

14 

13 

9.6 

8.8 

6.1 

5.9

5.4

Sodium 

(Na)

75 

49 

69 

65 

54 

45

6 

67 

67 

59 

69 

65

31 

27 

21 

16 

11 

10

11

Potassium 

(K)

3.8 

3.4 

4.2 

5.8 

4.0 

2.2

5 

1.6 

2.4 

1.9 

4.2 

4.8

3.6 

3.7 

2.7 

2.4 

2.4 

3.2

3.4

Bicarbonate 

(HCO,)

251 

205 

254 

260 

234 

205

221 

195 

186 

190 

201 

205

186 

182 

157 

146 

124 

112

76 

103

Sulfate 

(S04)

156 

100 

149 

129 

106 

91

104 

106 

92 

102 

118 

123 

117

81 

73 

46 

39 

19 

18

23 

22

Chloride 

(Cl)

25 

16 

22 

20 

16 

14

20 

20 

20 

18 

22 

15 

18

7.9 

7.4 

5.0 

4.5 

3.0 

2.8

3.0

Fluo* 

ride 

(F)

0.3 

.4 

.4 

.3 

.2 

.2

.2 

.2 

.3 

.2

.4 

.4

.2 

.5 

.3 

.3 

.3 

.3

.5

Nitrate 

(NO,)

0.7 

.2 

.5 

.5 

.4 

.8

.8 

1.1 

1.4 

.9 

1.6 

2.0

1.3 

1.0 

1.8 

1.1 

1.1 

1.6

1.2 

.5

Boron 

(B)

a Not included for computation of weighted averages, 

b Determined by Schwarzenbach method.
Aug. 9-10, 16-17, 

24-25 ...........

Weighted average .

1,449

1,108

43.0

10.0

c601

15

15

26

14

18

.08

.06

.03

.05

.02

0.05

22

24

30

58

76

67

33

5.3

5.7

7.8

15

18

7.6

11

19

27

76

96

120

20

3 2

3.8

5.6

5.8

5.6

7.5

3.1

94

112

129

212

186

460

228

224

132

20

27

49

82

178

506

240

260

39

3.0

4.9

7.0

13

23

18

1 ft

32

44

5.5

.5

.5

.5

.4

.4

.4

0.4

0.8

1.5

1.2

1.3

1.0

.5

1.3

1.3

1.2

a Not included for computation of weighted averages.

b Determined by Schwarzenbach method.

c Represents 92 percent of runoff for water year October 1950 to September 1951.
COLORADO RIVER BASIN

GREEN RIVER BASIN--Continued

LITTLE SNAKE RIVER NEAR LILY, COLO. Continued 

Temperature (°F) of water. December 1950 to August 1951

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

Average

Oct. Nov. Dec.

33

32

33

34

32

34

32

36

35

33

34

34

31

33

33

33

32

33

33

32

--

33

32

33

32

32

31

33

Jan.

_

32

33

31

31

32

32

32

32

32

32

32

32

32

32

32

32

33

31

..

31

32

32

33

33

33

31

32

31

32

Feb.

31

32

32

--

__

_

32

33

34

34

35

38

35

33

36

35

36

34

35

34

_.

--

Mar.

40

38

33

35

36

40

40

35

34

34

35

33

40

36

35

32

14

45

48

47

47

44

45

44

46

44

45

40

40

Apr.

50

41

42

41

_

54

53

40

41

41

42

55

46

45

45

47

48

50

49

45

50

54

52

50

51

53

54

52

54

--

48

May

55

56

51

57

58

57

57

54

53

57

56

56

55

56

57

_

60

58

57

58

58

58

62

59

57

59

59

60

60

61

57

June

52

61

61

60

62

60

58

60

58

57

58

59

67

68

58

60

62

61

65

64

..

63

63

64

65

60

_

63

61

62

61

July

65

60

66

_

--

60

61

63

64

64

75

80

71

64

62

62

64

66

65

66

63

66

65

66

64

65

61

63

71

68

65

Aug.

_

_

_

--

_

_

64

61

..

_

_

_

82

71

_

_

_

_

62

60

..

_

_

_

_

Sept.
GREEN RIVER BASIN 67

GREEN RIVER BASIN--Continued 

GREEN RIVER NEAR JENSEN, UTAH

LOCATION. At gaging station, 1 mile below Cub Creek, 6? miles northeast of Jensen, Uintah

County, and 12 miles upstream from Brush Creek.

RECORDS AVAILABLE. Sediment records: May 1948 to September 1951. 

EXTREMES, 1950-51. Sediment concentrations: Maximum daily, 7,950 ppm Mar. 27; minimum

daily, 22 ppm Sept. 21-30.

Sediment loads: Maximum daily, 138,000 tons June 1; minimum daily, 66 tons Jan. 1-6. 

EXTREMES, 1948-51 . Sediment concentrations: Maximum daily, 11,100 ppm Apr. 11, 1950;

minimum daily, 22 ppm Sept. 21-30, 1951. 

Sediment loads: Maximum daily, 367,000 tons June 5, 1949; minimum daily, 66 tons Jan.

1-6, 1951. 

REMARKS. Records of discharge for water year October 1950 to September 1951 given in

Water-Supply Paper 1213. For records of chemical analyses and water temperatures see

Green River at Jensen, Utah, p.71-73.

Suspended sediment, water year October 1950 to September 1951

Day

16 

17 

18 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total -

October

Mean

charge

(cfs)

1,700 

1,730 

1,730 

1,720 

1,720

1,730 

1,730 

1,720 

1,710 

1,700

1,690 

1,690 

1,700 

1,690 

1,680

1,670 

1,650 

1,620 

1,610 

1,610

1,610 

1,610 

1,600 

1,580 

1,580

1,550 

1,530 

1,550 

1,540 

1,560 

1,580

51,090

Suspended sediment

Mean 

concentration 

(ppm)

450 

350 

250 

173 

107

112 

111 

105 

56 

61

60 

57 

49 

76 

90

80 

87 

74 

78 

80

83 

83 

82 

82 

88

94 

95 

109 

176 

189 

120

Tons 

per 

day

a 2, 070 

a 1,630 

a 1,170 

803 

497

523 

518 

488 

259 

280

274 

260 

225 

347 

408

361 

388 

324 

339 

a 348

360 

a 361 

a354 

350 

375

393 

392 

456 

732 

796 

a 512

16, 593

November

Mean

charge

(cfs)

1,610 

1,650 

1,700 

1,730 

1,730

1,720 

1,740 

1,740 

1,730 

1,670

1,550 

1,410 

1,460 

1,390 

1,240

1,110 

1,460 

1,660 

1,740 

1,830

2,070 

2,390 

2,410 

2,390 

2,340

2,290 

2 t 290 

2,160 

2,000 

1,940

54,150

Suspended sediment

Mean 

concentration 

(ppm)

89 

68 

75 

118 

113

93 

110 

126 

107 

105

100 

75

94 

295

--

Tons 

per 

day

387 

303 

344 

551 

528

432 

517 

592 

500 

473

418 

286

377 

1,770

26,047

December

Mean

charge

(cfs)

1,940 

1,920 

1,780 

1,660 

1,600

1,380 

1,160 

1,010 

940 

1,170

1,420 

1,530 

1,970 

2,130 

2,070

1,950 

1,810 

1,700 

1,610 

1,450

1,540 

1,700 

1,430 

1,240 

1,120

1,110 

1,130 

1,030 

1,040 

1,060 

1,000

45, 600

Suspended sediment

Mean 

concentration 

(ppm)

96

144

110 

68

31

Tons 

per 

day

386

680

a 478 

259

c89

12,071

a Computed from estimated concentration graph.

c Computed from partly estimated concentration graph.
COLORADO RIVER BASIN

GREEN RIVER BASIN Continued

GREEN RIVER NEAR JENSEN, UTAH Continued

Suspended sediment, water year October 1950 to September 1951 Continued

Day

2

1 fi

on

o*

25

no

Totalg

21 ...... 

22 

23 

24 

25 ------ 

26 . 

27 . 

28 

29 ...... 

30 

31 

Total -

January

Mean

charge

(cfs)

860 

800 

770 

760 

760

760 

770 

790 

810 

850

880 

940 

1,000 

1,080 

1,150

1,220 

1,280 

1,310 

1,350 

1,400 

1,450 

1,450 

1,450 

1,450 

1,500

1,500 

,450 

,400 

,350 

,300 

,200

35,040

Suspended sediment

Mean 

concentration 

(ppm)

31

"

' 

1 "

\ 149

--

Tons 

per 

day

c66

186 

a 168 

157 

511

e550

10,610

April

3,590 

3,460 

3,380 

3,410 

3,620 

4,140 

5,000 

5,270 

5,330 

5,530 

5,480 

5,200 

5,020 

4,720 

4,330 

4,100 

4,840 

5,460 

5,840 

6,160

6,940 

7,690 

8,450 

8,190 

7,490

7,710 

8,620 

8,500 

8,270 

7,710

173,450

2,760 

2,850 

2,790 

2,800 

2,940

3,180 

3,310 

3,250 

3,080 

2,900 

2,800 

2,280 

1,850 

1,550 

1,410 

1,350 

1,390 

1,750 

1,930 

1,960 

2,000 

2,000 

2,000 

2,030 

880

1,320 

1,930 

1,540 

1,230 

1,050

--

26, SOU 

26, 600 

a25, 500 

a 2 5, 800 

a 28, 700

a 35, 500 

a44,700 

a 46, 200 

a 44, 300 

a43,300 

41,400 

a 32, 000 

325,100 

319,800 

316,500 

a 14, 900 

3 18, 200 

25,800 

30, 400 

32, 600

337,500 

341,500 

345,600 

44, 900 

17, 800

27, 500 

44, 900 

335,300 

a 27, 500 

321,900

948, 500

Februsry

Mean

charge

(cfs)

1,100 

1,000 

1,100 

1,200 

1,300

1,400 

1,500 

1,550 

1,620 

1,700

1,770 

1,850 

1,940 

2,020 

2,100

2,000 

1,920 

1,950 

1,950 

1,900 

1,880 

1,890 

1,860 

1,950 

1,900

1,870 

1,910 

1,890

48,020

Suspended sediment

Mean 

concentration 

(ppm)

496

297

300 

305 

239

--

Tons 

per 

day

e400

 e 1, 600 

2,480

 e2,700

1,520

a 1,520 

1,570 

1,220

46,410

May

7,970 

8,330 

8,560 

7,910 

6,810 

6,180 

6,370 

8,020 

9,380 

10,400 

10,500 

10, 200 

10, 400 

11,300 

11,500

11,800 

11,900 

12,800 

13,400 

13, 600 

14,000 

14,400 

15,400 

16,600 

17, 600 

18,200 

18,600 

19,100 

20, 100 

21, 700 

24,000

397,030

1,110 

1,430 

1,600 

1,220 

760

440 

520 

530 

690 

1,070 

1,100 

2,770 

2,610 

1,000 

500 

1,180 

1,670 

1,800 

2,630 

2,480

2,590 

3,000 

2,700 

2,480 

2,700

2,300 

2,180 

2,410 

2,230 

2,150 

2,100

323,900 

32, 200 

37, 000 

26,100 

14,000 

37,340 

8,940 

11, 500 

17, 500 

30, 000 

31,200 

76,300 

73, 300 

30, 500 

15,500

37, 600 

53, 700 

362,200 

95,200 

91,100

97,900 

3117,000 

112,000 

111,000 

128,000

113,000 

108,000 

124,000 

121,000 

a 126, 000 

3136,000

2, 069, 980

March

Mean

charge

(cfs)

1,840 

1,770 

1,700 

1,600 

1,660

1,710 

1,820 

1,870 

2,220 

2,330

2,190 

1,920 

2,000 

2,080 

2,150

2,110 

1,920 

1,750 

1,570 

1,670 

2,160 

2,400 

2,340 

2,880 

3,470

3,840 

3,680 

3,580 

3,790 

4,140 

3,890

74,050

Suspended sediment

Mean 

concentration 

(ppm)

240 

230 

230 

190 

200

210 

380 

400 

810 

830

737 

520 

480 

500 

560

490 

410 

380 

360 

380 

1,120 

1,420 

1,140 

2,970 

5,090

7,120 

7,950 

5,690 

5,530 

5,520 

3,290

--

Tons 

per 

day

1,190 

1,100 

1,060 

821 

896

970 

1,870 

2,020 

4,860 

5,220

4,360 

2,700 

2,590 

a2,810 

3,250

2,790 

2,130 

1,800 

1,530 

1,710 

6,530 

9,200 

7,200 

323,100 

347,700

373,800 

79, 000 

55, 000 

56, 600 

61,700 

34,600

500, 107

June

25, 500 

26, 000 

26, 600 

25,200 

22,700 

19, 800 

17,000 

15,000 

13, 800 

13, 000 

12, 600 

12,100 

11,700 

11,200 

11,200

12,200 

14, 000 

15,500 

17,000 

18,800

20, 100 

21,300 

21,100 

20, 600 

19,300

18,000 

16,600 

15, 300 

14, 200 

13,400

520, 800

2,000 

1,850 

1,750 

1,600 

1,500 

1,350 

1,200 

1,100 

1,020 

861 

775 

767 

900 

1,000 

1,090 

988 

1,110 

1,390 

1,220 

1,200

1,100 

1,100 

870 

830 

800 

780 

760 

740 

710 

690

--

3 138, 000 

3130,000 

a 126, 000 

3 107, 000 

a 91, 900 

a 72, 200 

a 55, 100 

a 44, 600 

38,000 

30, 200 

26,400 

23,100 

328,400 

330,200 

33, 000

32,500 

42,000 

58, 200 

56,000 

360,900

359,700 

63, 300 

49, 600 

a 46, 200 

341,700

a 37, 900 

334,100 

330,600 

327,200 

325,000

1,643,000

e Estimated.

a Computed from estimated concentration graph.

c Computed from partly estimated concentrstion graph.
GREEN RIVER BASIN 

GREEN RIVER BASIN Continued 

GREEN RIVER NEAR JENSEN, UTAH--Continued 

Suspended sediment, water year October 1950 to September 1951 Continued

69

Day

2

3. .....

12

13 

|O

99

24

25

9ft

30 

31 

TotalJuly

Mean

charge

(cfs)

12, 400 

12,100 

11, 700 

11, 400 

10, 900

10, 300 

10, 000 

9,530 

9,530 

9,380

8,910 

8,560 

8,190 

7,910 

7,990

7,690 

6,880 

6,210 

5,860 

5,660

5,770 

5,950 

6,540 

7,170 

7,990

7,550 

6,990 

6,250 

5,660 

5,590 

6,400

252,960

Suspended sediment

Mean 

concentration 

(ppm)

670 

650 

630 

620 

605

599 

580 

562 

592 

750

515 

535 

522 

476 

448

400 

350 

300 

250 

200

238 

270 

310 

180 

130

115 

180 

210 

390 

450 

1,070

Total discharge for year (cfsTotal load for year (tons). ....

Tons 

per 

day

a 22, 400 

a 21, 200 

a 19, 900 

a 19, 100 

17,800

16, 700 

a 15, 700 

14,500 

15,200 

19,000

12, 400 

12, 400 

11,500 

10, 200 

9,660

8,310 

a 6, 500 

a 5, 030 

a 3, 960 

a 3, 060

3,710 

4,340 

5,470 

3,480 

2,800

2,340 

a 3, 400 

a 3, 540 

5,960 

6,790 

18,500

324, 850

August

Mean

discharge

(cfs)

6,490 

6,400 

6,090 

6,120 

6,230

6,910 

6,760 

6,990 

6,910 

6,180

5,750 

5,350 

4,980 

4,570 

4,150

3,820 

3,560 

3,350 

3,210 

3,110

2,990 

2,970 

2,790 

2,780 

2,840

2,950 

3,020 

2,960 

2,930 

2,880 

2,800

138, 840

Suspended sediment

Mean 

concentration 

(ppm)

1,360 

2,230 

1,310 

720 

1,590

3,310 

4,290 

2,790 

1,810 

1,050

728 

700 

650 

400 

280

250 

220 

200 

230 

300

230 

760 

700 

470 

400 

200 

305 

330 

200 

100 

160

--

Tons 

per 

day

a 23, 800 

38,500 

21,500 

a 11, 900 

26, 700

61, 800 

78, 300 

52, 700 

33, 800 

17,500

11,300 

a 10, 100 

8,740 

4,940 

3,140

a 2, 580 

a 2, 110 

a 1,810 

a 1, 990 

2,520

a 1, 860 

6,090 

a 5, 270 

a 3, 530 

a 3, 070

1,590 

2,490 

2,640 

1,580 

778 

a 1,210

445, 838

September

Mean

charge

(cfs)

2,670 

2,580 

2,800 

3,060 

3,100

2,820 

2,610 

2,460 

2,340 

2,190

2,090 

2,050 

1,970 

1,890 

1,820 

1,780 

1,760 

1,750 

1,730 

1,690

1,660 

1,600 

1,570 

1,560 

1,530 

1,490 

1,500 

1,540 

1,570 

1,530

60, 710

Suspended sediment

Mean 

concen* 

tration 

(ppm)

200 

210 

380 

800 

1,470

870 

250 

185 

190 

190

160 

140 

119

51

22 

22

.......................... .................................... 6

Tons 

per 

day

1,440 

1,460 

a 2, 870 

a 6, 610 

a 12, 300

6,620 

1,760 

1,230 

1,200 

1,120

903 

a 775 

633

244

93 

a91

41, 557

, 851, 740 

,085, 563

a Computed from estimated concentration graph.
GREEN RIVER BASIN--Continued 

GREEN RIVER NEAR JENSEN, UTAH--Continued

Particle-size analyses of suspended sediment, April to September 

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S, 

W, in distilled water; C, chemically dispersed; M, mechanically d

Date of collection

Apr. 24, 1951....... ....

May 25 .................

Aug. 27 ................

Sept. 6 .................

Time

7:00 p. m. 

5:30 p.m. 

7:30 p. m. 

7:00 p. m. 

6:30 p. m. 

8:00 p. m. 

6:30 p. m. 

5:30 p. m.

Water 

discharge 

(cfs)

7,880 

6,350 

17, 700 

11,200 

7,990 

6,400 

3,000 

2,780

Suspended sedime

Concentration 

of sample 

(ppm)

2,560 

943 

2,160 

1,070 

949 

2,500 

333 

1,390

Concentration 

of suspension 

analyzed 

(ppm)

1,180 

577 

2,980

3,140 

828 

2,100

Percent finer th

0.002

25 

17

57

0.004

27 

19 

21

77 

76 

80

0.008

31 

22

87

0.016

36 

24 

36

92 

89 

91

0.03
GREEN RIVER BASIN--Continued 

GREEN RIVER AT JENSEN, UTAH

LOCATION. At bridge on U.S. Highway 40 at Jensen, Uintah County, 15 miles below gaging station, which 

east of Dinosaur National Monument headquarters, 6| miles northeast of Jensen, and 12 miles upstrea

RECORDS AVAILABLE.--Chemical analyses: June 1947 to September 1951.

Water temperatures: March 1949 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 627 ppm Mar. 11-20; minimum, 208 ppm June 11-20.

Hardness: Maximum, 331 ppm Dec. 11-20, Mar. 11-20; minimum, 135 ppm June 11-20. Specific conductanc

324 micromhos Apr. 26.

Water temperatures: Maximum observed, 73"F Aug. 1, 3; minimum observed, 33°F Jan. 4-7. 

EXTREMES, 1947-51. Dissolved solids: Maximum, 867 ppm Dec. 1-10, 1949; minimum, 161 ppm June 1-10, 19

Hardness: Maximum, 494 ppm Nov. 11-20, 1949; minimum, 111 ppm June 1-10, 1948. Specific conductance

daily, 237 micromhos May 30, 1948.

Water temperatures (1949-51): Maximum observed, 75°F on several days in August 1949; minimum observe

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduct

Salt Lake City, Utah. Records of discharge for gaging station near Jensen, Utah, for water year Oct

1213. No appreciable inflow between water sampling point and gaging station except during periods 

Chemical analyses, in parts per million, water year October 1950 to Se

Date of collection

Oct. 1-10, 1950 ...

Nov. 11-20. .......

Dec. 1-10. ....... .

Jan. 1-10, 1951...

Feb. 11-19. .......

Aor. 21-30. .......

Mean 

discharge 

(cfs)

1,719 

1,661 

1,572 

1,702 

1,485 

2,228

1,456 

1,764 

1,218 

793 

1,161 

1,409

1,347 

1,944 

1,894 

1,852 

1,936 

3,288

4,273 

5,115 

7.957

Silica 

(Si02)

8.9 

8.9 

8.8 

9.4 

9.8 

12

12 

12 

11 

10 

10 

10

10 

10 

11 

11 

11 

12

12 

14 

12

Iron 

(Fe)

oooooo 

o

Calcium 

(Ca)

62 

63 

63 

68 

68 

68

69 

80 

73 

56 

57 

63

64 

70 

61 

76 

80 

68

53

57 

46

Magnesium 

(Mg)

27 

28 

28 

29 

29 

30

30 

32 

29 

24 

24 

28

28 

28 

26 

29 

32 

25

18 

20 

15

Sodium 

(Na)

58 

58 

60 

69 

72 

62

62 

67 

62 

61 

63 

81

84 

81 

66 

70 

75 

48

25 

27 

24

Potassium 

(K)

4.8 

4.2 

5.0 

5.6 

6.8 

3.8

4.2 

4.0 

3.8 

5.0 

4.6 

4.8

4.3 

3.5 

2.4 

4.0 

3.0 

3.2

4.2 

4.4 

4.8

Bicarbonate 

(HCOS )

192 

186 

202 

224 

234 

214

211 

224 

211 

180 

182 

178

194 

196 

195 

205 

211 

209

192 

204 

170

Sulfate 

(S04 )

196 

200 

203 

204 

205 

205

205 

242 

220 

184 

192 

242

244 

242 

198 

247 

275 

171

83 

94 

71

Chloride 

(Cl)

28 

27 

27 

31 

32 

30

30 

30 

28 

27 

28 

38

39 

39 

31 

30 

32 

20

10 

10 

9.0

Fluoride 

(F)

0.3 

.3 

.3 

.3 

.3 

.2

.2 

.2 

.2 

.2 

.2 

.4

.4 

.4 

.3 

.4 

.4 

.4

.5 

.4 

.5

Nitrate 

(NO,)

2.2 

2.0 

1.0 

.4 

.3 

2.2

2.8 

2.4 

2.1 

1.0 

1.0 

1.5

4.3 

4.6 

1.0 

1.5 

3.5 

3.2

4.4 

3.1 

3.0

Boron 

(B)

(

Par

pe

mil

lion

4

5

5

5

5

5

5

5

5

4

4

5

5

6

5

6

6

4

3

3

2
GREEN RIVER BASIN Continued 

GREEN RIVER AT JENSEN, UTAH Continued

Date of collection

May 1-10, 1951... .

July 21-31 ........

Aug. 11-20.... ....

Weighted average

Mean 

discharge 

(cfs)

a 7, 993 

11,740 

a 19, 970

20, 460 

13,630 

17,990 

10, 720 

7,386 

6,533

6,508 

4,185 

2,901 

2,663 

1,853 

1,555

b4,570

Silica 

(SiOa)

13

12 

9.7 

10 

9.0 

8.8 

15

9.5 

8.6 

7.8 

8.6 

6.7 

11

11

Iron 

(Fe)

--

0.03 

.02 

.07 

.02 

.02 

.03

.02 

.01 

.03 

.02 

.02 

.01

0.03

Calcium 

(Ca)

44

43 

36 

37 

41 

41 

48

54 

54 

56 

62 

54 

56

49

Magnesium 

(Mg)

11

13 

11 

12 

14 

14 

14

17 

20 

19 

22 

22 

22

17

Sodium 

(Na)

22

19 

19 

18 

28 

28 

36

46 

47 

44 

52 

50 

70

35

Potassium 

(K)

--

5.8 

4.8 

6.4 

4.8 

4.8 

6.8

8.0 

5.4 

5.8 

6.0 

5.8 

5.8

5.3

Bicarbonate 

(HCO,)

160

162 

132 

137 

161 

161 

179

174 

170 

175 

182 

168 

176

169

Sulfate 

(S04 )

50

59 

53 

53 

69 

70 

92

134 

143 

141 

175 

160 

192

104

Chloride 

(Cl)

11

10 

8.9 

9.4 

10 

9.8 

12

20 

20 

19 

19 

21 

26

15

Fluoride 

(F)

--

0.5 

.4 

.4 

.4 

.4 

.2

.2 

.2 

.2 

.2 

.2 

.2

0.4

Nitrate 

(NO,)

1.7

4.1 

4.1 

5.3 

3.5 

3.3 

1.2

3.2 

2.5 

2.6 

1.9 

1.9 

1.8

3.2

Boron 

(B)

D

(r

Part

per 

million

26

24

26

24

20

2

25

25

3

37

38

3

44

4

47

32

a Not included for computation of weighted averages.

b Represents 85 percent of the runoff for water year October 1950 to September 1951.
GREEN RIVER BASIN 73

GREEN RIVER BASIN Continued 

GREEK RIVER AT JENSEN, UTAH Continued

Temperature (°F) of water, water year October 1950 to September 1951 

/Once-daily temperature measurement at approximately 12 m.7

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

Average

Oct.

57

56

55

54

54

54

53

53

54

54

55

55

55

54

54

53

53

53

52

52

52

52

52

52

52

52

52

51

51

51

51

53

Nov.

50

50

50

50

49

49

49

49

48

48

48

48

48

47

47

46

46

45

47

46

46

45

45

44

--

43

42

42

41

41

47

Dec.

40

40

39

40

39

39

38

38

38

38

38

37

37

36

36

36

35

35

34

35

35

35

35

35

34

34

34

35

35

34

36

Jan.

34

34

34

33

33

33

33

34

34

34

34

34

34

34

34

35

35

35

35

35

36

36

36

36

36

36

36

35

35

36

35

Feb.

35

36

36

36

37

37

37

37

38

37

37

37

36

36

36

36

35

35

36

38

37

35

36

36

36

36

36

_

_

36

Mar.

36

37

38

38

38

38

39

40

40

39

39

40

41

41

41

42

42

43

43

43

44

45

45

45

45

45

45

44

44

44

45

42

Apr.

45

46

46

45

45

46

47

47

47

47

48

48

49

49

49

50

50

48

49

50

51

52

52

53

53

54

54

54

54

55

49

May

56

57

57

57

58

_

59

60

60

61

61

62

59

60

61

62

62

61

61

62

63

63

63

63

64

64

65

66

66

67

61

June

65

64

64

60

58

58

59

59

59

60

60

60

61

61

61

60

62

62

63

62

63

62

63

63

63

63

63

64

64

62

62

July

62

63

63

63

63

64

64

64

65

65

65

66

66

66

66

65

66

67

67

68

69

70

70

70

70

70

70

71

71

72

72

67

Aug.

73

72

73

69

69

70

70

70

70

70

71

71

71

70

70

70

70

70

70

71

70

70

70

70

70

70

70

70

70

70

70

70

Sept.

70

71

71

70

69

69

69

69

68

68

66

66

66

65

65

65

64

64

63

63

60

60

61

60

60

59

58

~

65
GREEN RIVER BASIN Continued 

DUCHESNE RIVER NEAR RANDLETT, UTAH

LOCATION. At gaging station, a quarter of a mile downstream from Uinta River, 1J miles southeast of Ra

Uintah County.

DRAINAGE AREA. 3,920 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951. 

EXTREMES, December 1950 to September 1951. Specific conductance: Maximum daily, 2,610 micromhos Sept. 

Water temperatures: Maximum, 72°F July 28-29; minimum, freezing point on many days during December t

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of specifi

office at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 

Chemical analyses, in parts per million, December 1950 to Septemb

Date of collection

Dec. 2-10, 1950.....

Dec. 22, 28, 30 ..... 

Jan. 1-10, 1951 ..... 

Jan. 11 .............

Jan. 13-20..........

Jan. 21-31..........

Feb. 1, 5-10........

Feb. 2-3 ...........

Feb. 4 .............

Feb. 11-20 .........

Feb. 21-28 .........

Mar. 1-10 ..........

Mar. 11-20 .........

Mar. 21-31 .........

Apr. 11-20 .........

Apr. 21-30 .........

May 1-10 ...........

May 11-20 ..........

May 21-24 ..........

May 25-28, 30-31 ... 

May 29 .............

June 11-20 .........

June 21-30 .........

Mean 

discharge 

(efs)

571 

575 

441 

436 

420 

420 

420

470 

470 

470 

470 

470 

468 

359 

294

224 

220 

278 

276 

634 

1,518 

3,357 

4,600

3,500 

1,726 

2,308 

2.044

Temperature 

(°F)

Silica 

(Si02)

16 

18

17 

13

15 

14

13 

16

12

Iron 

(Fe)

Calcium 

(Ca)

98 ' 

99

102 

70

94 

113

108 

93

60

Magnesium 

(Mg)

60 

60

60 

38

59 

72

65 

50

31

Sodium 

(Na)

Potassium 

(K)

166 

160

163 

76

165 

187

231 

164

83

Bicarbonate 

(HCOS)

278 

292 

296 

320 

310 

270

274 

314

303 

270

187

Sulfate 

(SOJ

467 

451 

412 

443 

395 

219

294 

445 

196 

450

543

573 

423

224

Chloride 

(Cl)

96 

92 

79 

92 

89 

32

59 

95 

22 

100

114

137 

93

50

Fluoi 

ride 

(F)

Nitrate 

(N03)

2.1 

2 2

2.3

4.1 

1.4

1.8 

1.7

1.3

1.4

.9

B

r

(
July 11-20 ..........

July 21-31 ..........

Aug. 1-10 ..........

Aug. 11-20 .........

Aug. 21, 24 .........

Aug. 22-23, 25-31... 

Sept. 1-10 ..........

Sept. 11-20 .........

Sept. 21-30 .........

Weighted average . .

613

460

460

699

251

330

343

133

127

a657

_

11

13"

15-

91

107"

132-

54

61

--

94

--

180

216

--

256-

250

284

--

295-

_

455

548

--

740-

_

114_

130

--

184-

_

.9_

1.6"

2.7-

a Represents 88 percent of runoff for water year October 1950 to September 1951
76 COLORADO RIVER BASIN

GREEN RIVER BASIN Continued

DUCHESNE RIVER NEAR RANDLETT, UTAH--Continued

Temperature (°F) of water, December 1950 to September 1951

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

Average

Oct. Nov. Dec.

_.

35

34

38

32

32

33

34

33

35

35

34

34

36

39

40

_

33

33

_

34

32

--

Jan.

33

32

34

32

32

32

32

33

32

33

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

Feb.

32

32

32

32

32

32

32

32

32

33

32

32

32

32

32

33

32

32

32

32

32

32

33

33

32

33

33

32

--

32

Mar.

32

34

34

32

35

_

38

38

39

37

32

32

36

36

39

38

32

32

32

35

43

39

35

36

37

39

40

37

39

43

43

36

Apr.

44

44

46

49

48

47

47

48

49

43

42

43

46

47

47

47

49

50

53

48

49

44

49

48

50

..

48

53

51

48

--

47

May

44

44

44

52

53

56

56

56

51

53

55

56

47

52

51

51

55

56

55

57

55

56

57

56

56

57

58

57

55

54

54

54

June

53

48

50

52

53

54

55

54

54

55

54

56

58

58

61

62

61

58

59

59

59

57

59

60

58

59

60

59

60

60

--

57

July

60

61

62

63

63

65

65

64

61

63

64

61

64

66

68

68

68

64

70

71

67

64

66

67

68

70

68

72

72

71

71

66

Aug.

69

70

71

69

69

65

68

66

64

64

63

63

64

62

61

63

64

65

66

66

63

64

63

60

61

61

60

62

61

59

62

64

Sept.

61

62

63

63

60

59

58

60

55

57

56

49

53

52

54

52

52

53

50

52

53

49

49

50

51

52

49

52

50

53

--

54
GREEN RIVER BASIN Continued 

GREEN RIVER NEAR OURAY, UTAH

LOCATION. At gaging station, 2J miles upstream from Willow Creek and 3 miles southwest of Ouray, Uin

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951.

Sediment records.- December 1950 to September 1951.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific condu

Salt Lake City, Utah, Records of discharge for water year October 1950 to September 1951 given in 

Chemical analyses, In parts per million, December 1950 to Sept

Date of collection

Dec. 1-10, 1950.. ...

Feb. 5-7, 10........

Feb. 21, 23-24, 26 . .

Mar. 14, 16-19.. ....

Mar. 24, 28-29, 31..

July 23, 25-28, 30-31 

Aug. 1-10. ....... ...

Sept. 21-30 .........

Mean 

discharge 

(cfs)

2,736 

2,903 

2,432 

1,107

2,212 

3,400 

3,438 

3,252 

3,092 

4,568

4,773 

5,632 

17,900

7,962 

7,939 

8,010 

6,925 

4,170

3,567 

2,485 

2,000

Temperature 

(°F)

Silica

(sicg

13 

14

14 

13 

12

15

21 

13

12 

12

9.8

Iron 

(Fe)

Calcium 

(Ca)

74

66 

68

58 

43

38 

54

59

Magnesium 

(Mg)

35

29 

29

24 

15

14 

15

24

Sodium 

(Na)

Potassium 

(K)

79

86 

86

43 

19

21 

44

64

Bicarbonate 

(HCO,)

237 

258

239 

227 

206

212

197 

163

142

180

181

Sulfate 

(S0«)

240

222 

232

138 

58

62 

114

184

Chloride 

(Cl)

40 

49

39 

37 

40

41

22 

10

12 

18

31

Fluo* 

ride 

(F)

Nitrate 

(NO,)

0.9

1.6 

1.9

.9 

1.6

.6 

1.1

.6

a Determine! by Schwarzenbach method, 

b Sum of determined constituents.
78 COLORADO RIVER BASIN

GREEN RIVER BASIN Continued

GREEN RIVER NEAR OURAY, UTAH--Continued

Temperature (°F) of water, December 1950 to September 1951

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

Averacre

Oct. Nov. Dec.

36

34

35

38

36

33

34

33

35

35

37

36

37

35

37

38

35

36

35 

34

33 

33

"

33

Jan.

..

--

33

33

33

_

-

_

"

_

--

Feb.

__

34

34

34

34

34

35

34

34

34

34

34

34

34

34 

34

34

34

Mar.

35

34

33

--

_

34

34

_

36

45

40

35

41

41

44

--

46

50

_

45

45

45

45

Apr.

48

50

53

53

53

_

54

51

45

48

51

50

47

49

54

55

55

54

49

_

54

55

54

50

--

May

48

50

55

_

60

_

--

60

_

60

June

_

58

"

62

67

66

67

_

68

65

63

_

67

July

68

"

_

_

71

75

81

79

--

75

74

74

78

80

81

Aug.

76

78

76

73

70

76

79

74

73

76

72

72

_

71

71 

72

70

~

..

73

72

70

71

72

Sept.

73

68

69

71

70

72

71

68

_

50

67

63

69

70

69

68

68 

64

60 

66

62

64

59

63

60

64

65

fifi
GREEN RIVER BASIN 

GREEN RIVER BASIN Continued 

GREEN RIVER NEAR OURAY, UTAH--Continued 

Suspended sediment, December 1950 to September 1951

79

Day

2

9 .

12

13

18

19

22

o«

24

97

28

29

Total2

5 

7 

8 

9 

10 

11 

12 

13- 

17 

18 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

October

Mean

charge

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

January

,600 

,400 

,300 

,150 

,100

,100 

,100 

,120 

,160 

,200

,250 

,350 

1,450 

1,600 

1,750 

1,900 

2,000 

2,100 

2,200 

2,250

2,300 

2,250 

2,250 

2,220 

2,220 

2,220 

2,260 

2,300 

2,200 

2,150 

2,100

54, 550

[ 121 

184

362 

1,090

d 24, 306

November

Mean

charge 

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

February

1,950 

1,850 

1,800 

1,700 

1,850

2,000 

2,200 

2,450 

2,600 

2,800

2,900 

3,000 

3,150 

3,300 

3,500 

3,600 

3,750 

3,700 

3,600 

3,500

3,500 

3,500 

3,400 

3,350 

3,400 

3,500 

3,450 

3,400

82, 700

I 175 

220

j- 300

371 

320

283 

[ 658

-

b900 

b850 

b800 

b700

c950

1,460 

b 1, 700

c2,350

3,160 

c2,850

2,750

b3, 500 

6,060

b6,000 

b 5, 800

81,110

December

Mean

discharge

(cfs)

2,990 

2,960 

2,960 

2,980 

2,900

2,800 

2,650 

2,500 

2,400 

2,220 

2,240 

2,540 

2,610 

2,960 

3,320

3,420 

3,300 

3,060 

2,840 

2,740

2,600 

2,490 

2,540 

2,570 

2,320

2,100 

1,950 

1,900 

1,850 

1,800 

1,650

80. 160

Suspended sediment

Mean 

concentration 

(ppm)

512

520 

267

.-

Tons 

per 

day

3,780

4,080

1,760 

 b840

93, 360

March

3,300 

3,200 

3,100 

3,100 

3,100

3,060 

3,040 

3,170 

3,490 

3,470

3,600 

3,420 

3,070 

3,010 

3,140 

3,250 

3,280 

3,120 

2,800 

2,600

2,580 

2,720 

3,370 

3,420 

3,460 

4,360 

4,960 

5,110 

4,740 

4,700 

5,000

107,740

574 

517 

510 

510 

500

500 

500 

600 

750

100 

120 

100 

100 

160 

110 

850 

820

800 

950 

1,450 

1,500 

1,500 

2,400 

3,210 

5,600 

5,670

6,190

5,110 

4,470 

4,270 

a 4, 270 

a 4, 180

a 4, 130 

a 4, 100 

5,140 

7,070 

b 8, 000

b 12, 000 

bl 1,000 

9,120 

9,100 

a 9, 320 

9,650 

10, 300 

9,350 

6,430 

5,760

a 5, 570 

a 6, 980 

a 13, 200 

13,900 

14,000 

a 28, 300 

43,000 

77, 300 

72,600 

b 70, 000 

83, 600

571,220

a Computed from estimated concentration graph.

b Computed from water-sediment discharge curve.

c Computed from partly estimated concentration graph.

d Includes loads for missing days computed from water-sediment discharge curves.
80 COLORADO RIVER BASIN 

GREEN RIVER BASIN Continued 

GREEN RIVER NEAR OURAY, UTAH Continued 

Suspended sediment, December 1950 to September 1951 Continued

Day

3

12

13

1 P.

22

94

25

97

no

29

31 

Total2

g

12

13

i n

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

April

Mean

charge

(cfs)

5,130 

4,780 

4,490 

4,340 

4,340

4,510 

4,780 

5,550 

6,180 

6,360

6,529 

6,390 

6,000 

5,770 

5,460

5,090 

4,760 

5,070 

6,320 

6,870

7,010 

7,630 

8,870 

9,930 

9,510 

8,950 

8,870 

9,960 

9,690 

9,460

198, 590

Suspended sediment

Mean 

concentration 

(ppm)

4,780 

4,680 

3,660 

2,600 

2,350

2,300 

2,450 

3,500 

4,300 

4,400

4,180 

3,560 

2,880 

2,400 

2,060

1,650 

1,550 

1,350 

1,410 

2,360

2,700 

2,970 

3,600 

4,100 

3,800 

3,300 

2,700 

2,280 

1,890 

1,603

...

Tons 

per 

day

66,200 

60,400 

44,400 

30,500 

27, 500

a 28, 000 

31,600 

52,400 

a71,700 

75,600

73, 600 

61, 400 

46, 700 

a 37, 400 

30,400

22,700 

19,900 

18, 500 

24,100 

43,800

a51,100 

61,200 

a 86, 200 

1110,000 

a97,600 

a 79, 700 

64, 700 

61,300 

49,400 

40,900

1,568,900

July

16,800 

15,800 

15, 200 

14,500 

14,000 

13,400 

12,600 

12, 100 

11,400 

11,300

11, 200 

10, 300 

9,750 

9,230 

8,790

8,730 

8,500 

7,680 

6,940 

6,640 

6,850 

7,880 

7,780 

7,900 

8,220

9,110 

8,730 

8,220 

7,460 

6,920 

6,590

310, 320

857

I 433

400

450 

5,200 

6,100 

3,700 

2,800

2,100 

1,400 

800 

616 

474 

538

36,600

9,310

a 7, 170 

a 8, 320 

sllS.OOO 

a 128,000 

a78,900 

62,100

51,900 

33,000 

17,800 

12,400 

8,860 

9,570

d929, 860

May

Mean

charge

(cfs)

9,000 

9,090 

9,200 

9,540 

9,030

7,980 

7,270 

7,220 

8,500 

10, 400

11,600 

11,900 

11,800 

12, 200 

13,800

14, 000 

14, 100 

14, 100 

15, 600 

15,800

15, 600 

16, 700 

18,800 

20, 200 

20, 700

21,900 

23, 500 

25, 600 

28, 100 

29, 700 

30,200

473. 130

Suspended sediment

Mean 

concentration 

(ppm)

1,600 

1,310 

1,330

1,720

2,960 

2,410

Tons 

per 

day

38,900 

32,200 

33,000

53,900

165,000 

197,000

 d2,882,000

August

7,010 

7,680 

7,510 

7,750 

8,580 

8,380 

8,450 

8,400 

8,320 

8,020 

7,370 

6,920 

6,480 

6,090 

5,530 

5,090 

4,630 

4,340 

4,120 

3,990 

4,160 

4,220 

4,240 

4,400 

4,100

3,840 

3,840 

3,820 

3,860 

5,460 

3,930

180, 000

520 

1,970 

3,600 

4,000 

3,980

3,880 

3,930 

2,110 

1,550 

1,480 

1,520 

1,150 

824 

800 

610

430 

352 

330 

300 

250

950 

2,700 

4,600 

6,800 

6,120

3,200 

2,080 

1,800 

2,050 

9,200 

11,800

9,840 

40,800 

73,000 

83,700 

92,200 

87,800 

89,700 

47,900 

34,800 

32,000

30,200 

a 21, 500 

14,400 

a 13, 200 

a 9, 100

a 5, 910 

4,400 

a 3, 870 

a 3, 340 

a 2, 690

a 10, 700 

30, 800 

52,700 

80,800 

a 67, 700

a 33, 200 

21,600 

18,600 

a 21, 400 

is 145,000 

s 171,000

1,353,850

June

Mean

charge

(cfs)

30,000 

28,700 

28,300 

28,200 

27, 100

24,500 

22,000 

19,900 

18,600 

17,200

16,300 

15,800 

15,400 

14,800 

14,900

15,300 

17, 000 

18,900 

21,600 

24, 100

26,400 

27,900 

27,400 

26, 100 

24,900

23, 800 

22, 200 

20,400 

19,000 

18,100

654, 800

Suspended sediment

Mean 

concentration 

(ppm)

1,580

1,100 

1,100 

1,120 

1,230

1,160

2,400 

1,360

1,130

L_

Tons 

per 

day

84,900

48,400 

a 46, 900 

46,600 

49,200

67,700

181,000 

91,400

58,000

d2,930,100

September

4,180 

3,840 

3,580 

3,490 

3,670

3,860 

3,640 

3,340 

3,110 

2,960

2,840 

2,700 

2,600 

2,560 

2,470

2,410 

2,360 

2,330 

2,310 

2,270

2,200 

2,140 

2,070 

2,010 

2,000

1,960 

1,890 

1,860 

1,910 

1,960

80, 520

5,770 

2,800 

1,350 

900 

732

1,010 

800 

800 

800 

900

640 

600 

500 

400 

370

320 

314 

297 

292 

255

200 

183 

184 

120 

126 

149 

111 

114 

126 

130

~

65, 100 

329,000 

13,000 

8,480 

7,250

10,500 

7,860 

7,210 

a 6, 720 

7,190

a 4, 910 

a 4, 370 

3,510 

2,760 

2,470

2,080 

2,000 

1,870 

1,820 

1,560

1,190 

1,060 

1,030 

651 

680 

789 

566 

573 

650 

688

197,537

Total discharge for period (cfs-days)......................................................... 2,223,040

Total load for period (tons).................................................................. d10,632, 243

s Computed by subdividing day.

a Computed from estimated concentration graph.

d Includes loads for missing days computed from water-sediment discharge curves.
GREEN RIVER BASIN Continued 

GREEN RIVER NEAR OURAY, UTAH Continued

Particle analyses of suspended sediment, April to September 19

(Methods of analysis: B, bottom withdrawal tube; O, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

May 31. .................

Sept. 1. .................

Time

3:30 p.m. 

3:30 p.m. 

2:30 p.m. 

2:45 p.m. 

2:05 p.m. 

4:15 p.m.

Water 

discharge 

(cfs)

6,500 

9,000 

29, 700 

16, 200 

7,980 

4,120

Suspended sedi

Concentration 

of sample 

(ppm)

1,720 

1,670 

3,250 

1,240 

1,990 

5,060

Concentration 

of suspension 

analyzed 

(ppm)

1,650 

1,300 

3,830 

681 

1,940 

5,250

Percent finer 

0.002

23 

11 

33 

3 

35

0.004

26 

20 

38

5 

47 

67

0.008

31 

28 

40 

7 

58

0.016

41 

33 

45 

15 

68 

93

0
GREEN RIVER BASIN Continued 

WHITE RIVER NEAR WATSON, UTAH

LOCATION. At gaging station, just downstream from Evacuation Creek, 250 feet downstream from highway b

DRAINAGE AREA. 4,020 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

tfater temperatures: December 1950 to September 1951. 

EXTREMES, December 1950 to September 1951. Dissolved solids: Maximum, 811 ppm July 21-22; minimum, 23

Specific conductance: Maximum daily, 1,210 micromhos July 21; minimum daily, 319 micromhos June 29.

Water temperatures: Maximum, 80°F July 30; minimum, freezing point on many days during December to M

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduct

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million, December 1950 to Septembe

Date of collection

Dec. 4-10, 1950....

Dec 21-31

Jan. 1-10, 1951 ....

Apr. 21-30 .......

June 21-30 .......

Mean 

discharge 

(cfs)

353 

394 

346 

277 

289 

317

346 

446 

493 

527 

414 

375

368 

374 

575 

684 

1,123 

1,980

1,735 

1,663 

2.269

Temperature 

CF)

Silica 

(Si02)

18 

18 

18

20

16 

18

17 

17

15

Iron 

(Fe)

Calcium 

(Ca)

76 

72 

75

84

69 

79

73 

56

49

Magnesium 

(Mg)

26 

25 

26

28

27 

30

24 

14

13

Sodium 

(Na)

Potassium 

(K)

83 

83 

88

96

92

95

85 

25

24

Bicarbonate 

(HCOS)

222 

214 

222

238

218 

241

199 

171

166

Sulfate 

(S04 )

189 

189 

193

207

200 

222

190 

71

62

Chloride 

(Cl)

70 

64 

72

87

68 

69

73 

25

19

Fluo* 

ride 

(F)

Nitrate 

(NOS)

0.8 

.7 

.5

1.0

1.8 

1.6

.6 

1.8

1.5

Bo

ro

(B

a Not included for computation of the weighted averages, 

b Sum of determined constituents.
July 23, 25-30 ....

Aug. 21-29 ......

Weighted average.

606

1,220

536 

459

598

642

3 350

911

343

c702

20

--

17

--

56

--

70

68

-

17

"

24

-

44

"

54

63

-

170

--

194

191

-

105

"

145

151

--

39

"

56

__

65

-

.7

--

_

1.1

.6

a Not included for computation of the weighted averages.

c Represents 85 percent of runoff for water year October 1950 to September 1951.
84 COLORADO RIVER BASIN

GREEN RIVER BASIN Continued 

WHITE RIVER NEAR WATSON, UTAH Continued 

Temperature (°F) of water, December 1950 to September 1951

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

Average

Oct. Nov. Dec.

33

35

33

32

32

33

31

34

34

34

35

35

38

33

34

34

34

33

32

32

32

32

32

32

31

32

32

33

33

Jan.

32

36

34

32

33

34

32

32

31

32

32

_

31

32

32

34

33

32

32

35

32

32

32

32

33

35

34

32

32

33

34

33

Feb.

--

32

32

32

31

35

35

33

34

34

33

33

-.

32

33

34

34

34

34

35

34

35

34

35

32

33

32

_-

--

33

Mar.

33

34

31

34

35

34

33

34

34

33

34

33

35

36

38

40

33

34

40

40

44

33

40

45

50

35

40

45

40

50

50

38

Apr.

50

55

50

50

50

45

46

45

48

45

42

45

35

48

46

50

55

50

55

55

55

50

55

56

56

58

50

50

-_

50

--

50

May

45

50

56

54

57

58

56

58

58

60

60

58

55

55

55

60

58

60

60

60

60

58

58

60

64

«0

62

62

74

60

58

58

June

60

55

..

58

60

60

60

58

60

62

60

62

64

58

60

65

68

68

58

60

58

62

64

63

65

62

60

64

64

60

--

61

July

62

64

65

69

69

70

69

70

71

71

65

68

70

72

74

75

78

79

75

70

69

72

75

74

76

78

78

80

78

72

Aug.

73

76

78

76

70

72

74

74

78

76

78

70

76

76

78

78

76

72

70

70

76

72

68

68

70

..

70

70

65

70

65

73

Sept.

68

66

65

70

68

68

64

62

62

62

60

62

61

60

60

60

58

58

60

64

62

62

62

64

60

62

62

63

60

63
GREEN RIVER BASIN Continued 

WILLOW CREEK NEAR OURAY, UTAH

LOCATION . At gaging station 8 miles upstream from mouth and 10 miles south of Ouray, Uintah County.

DRAINAGE AREA. 967 square miles.

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951. 

EXTREMES, December 1950 to September 1951. Specific conductance: Maximum daily, 8,770 micromhos Jul

Water temperatures: Maximum, 89°F July 14; minimum, freezing point on many days during December to 

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of speci

office at Salt. Lake,City, Utah. Records of discharge for water year October 1950 to September 195

Chemical analyses, in parts per million, December 1950 to Septemb

Date of collection

Dec. 1-6, 8-10, 19bO

Jan. 1-10, 1951 ...

Apr. 21-25, 30 ....

June 1-3, 6-10 ....

July 1-7, 9-10 ....

Julv 11-20 ........

Mean 

discharge 

(cfs)

34.7 

24.0 

31.0 

19.3 

17.0 

17.0 

16.8

18.1 

23.0 

23.0 

27.6 

38.7 

40.0 

48.2

44.5 

40.5 

27.7 

13.8 

9.6 

4.4 

14.0 

7.6

4.3 

2 3 

1.5 

.3 

.1 

.2

Temperature 

<°F)

Silica 

(Si02)

21

21 

21

23

19 

18

19 

14

13 

19

Iron 

(Fe)

Calcium 

(Ca)

86

85 

109

106

86 

80

80 

102

122 

119

Magnesium 

(Mg)

87

85 

128

113

81 

74

69 

178

256 

302

Sodium 

(Na)

Potassium 

(K)

210

213 

353

297

199 

174

161 

782

868 

1,170

Bicarbonate 

(HCO,)

a 488 

b624 

C478 

605

581

452 

438

417 

624

770 

753

Sulfate 

(SO,)

562 

989 

568 

958

802

546 

468

440 

1,970

2,360 

3,120

Chloride 

(Cl)

27 

48 

26 

47

40

26 

23

23

88 

42

110 

154

Fluo* 

ride 

(F)

Nitrate 

(NO,)

5.6

5.5 

8.1

8.8

5.2 

4.6

2.5 

.5

.7 

.6

a Includes equivalent of 14 parts per million of carbonate (CO,). 

b Includes equivalent of 24 parts per million of carbonate (CO,). 

c Includes equivalent of 12 parts per million of carbonate (CO3).
GREEN RIVER BASIN Continued

WILLOW CREEK NEAR OURAY, UTAH Continued

Chemical analyses, in parts per million, December )950 to September 1951 

Date of collection

Aug. 3, 9-10, 1951..

Aug. 21-22, 25-31..

Weighted average

Mean 

discharge 

(cfs)

1.5 

11.0 

4.0 

.5 

3.1 

2.0 

3.0 

1.1 

1.3 

1.5

d!6. 8

Temperature 

<°F)

Silica 

(Si02)

14 

14

"

Iron 

(Fe)

Calcium 

(Ca)

98 

92

"

Magnesium 

(Mg)

278 

267

--

Sodium 

(Na)

Potassium 

(K)

1,070 

995

--

Bicarbonate 

(HCO,)

810 

835

--

Sulfate 

(S0«)

2,740 

2,530

--

Chloride 

(Cl)

133 

122

--

Fluoride 

(F)

Nitrate 

(NO,)

0.6

.5

"

Bo

ron 

(B)

a Represents 75 percent of runoff for water year October 1950 to September 1951.
GREEN RIVER BASIN 87

GREEN RIVER BASIN Continued 

WILLOW CREEK NEAR OURAY, UTAH Continued 

Temperature (°F) of water, December 1950 to September 1951

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

Average

Oct. Nov. Dec.

33

32

--

32

32

32

32

32

32

32

32

33

32

33

33

32

33

32

32

32

32

32

32

32

32

32

32

32

32

Jan.

32

--

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

Feb.

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

32

--

32

Mar.

32

32

32

32

31

34

34

34

43

40

33

37

36

45

46

42

32

40

43

45

50

45

35

45

48

48

45

48

46

45

45

40

Apr.

55

55

55

52

53

53

53

60

47

51

54

58

60

58

58

56

59

55

48

45

62

59

60

55

45

58

58

45

55

May

48

62

60

62

62

67

CO

58

75

70

55

60

58

68

67

68

60

66

62

60

50

63

64

71

70

76

65

64

60

64

63

June

60

56

74

64

63

71

62

64

83

76

63

83

75

68

75

76

--

_

76

78

68

78

70

69

67

72

70

July

75

81

84

84

81

81

76

69

83

71

74

88

87

89

71

72

78

71

78

_

Aug.

--

77

74

76

74

84

80

76

70

74

75

69

67

78

77

70

72

70

72

77

62

70

74

83

71

67

65

76

76

73

Sept.

76

79

74

78

70

76

68

79

51

64

67

50

72

74

79

69

65

69

69

70

57

70

72

72

68

66

63

69
GREEN RIVER BASIN Continued 

PRICE/RIVER AT WOODSIDE, UTAH

LOCATION. At gaging station at bridge on U. S. Highway 50 at Woodside, Emery County, and 20 miles up

DRAINAGE AREA. 1,500 square miles, approximately.

RECORDS AVAILABLE.--Chemical analyses: December 1946 to September 1949, February to September 1951.

Water temperatures: February to September 1951. 

EXTREMES, February to September 1951. Dissolved solids: Maximum, 4,560 ppm Apr. 11-20; minimum, 2,4

Hardness: Maximum, 1,720 ppm Apr. 11-20; minimum, 710 ppm May 16.

Specific conductance: Maximum daily, 6,190 micromhos Apr. 17; minimum daily, 2,430 micromhos May 1

Water temperatures: Maximum, 87°F July 16.

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of speci

district office at Salt Lake City, Utah. Records of discharge for water year October 1950 to Sept

Chemical analyses in parts per million, February to September 

Date of collection

Feb. 15-20, 1951

Feb. 21-28.. ...

Mar. 1-10 ....

Mar. 11-20 ...

Mar. 21-31 .. .

Apr. 1-10 .....

Apr. 11-20 ....

Apr. 21-30 ....

May 1-10 a ... 

May 11-13, 15,

17-20 .......

May 14 a ......

May 16 a ......

May21-31a ... 

June 1-10 .....

June 11-20 ....

June 21-30 ....

July 1-10 .....

July 11-20 ....

July 21-31 .....

Aug. 1-10 .....

Aug. 11-20 ....

Aug. 21-31 ....

Sept. 1-10 ....

Sept. 11-20 . ..

Sept. 21-30 ...

Weighted average

Mean 

discharge 

(cfs)

60.0

68.5

67.6

81.9

94.4

53.7

32.4

67.0 

54.0

109

69.0

9n9 et\jft

84.4

84.2

103

114

39.4

61.3

106

722

53.4

181

51.0

53.8

59.2

C109

Silica 

(Si02)

8.7

9.0

13

12

11

11

11

11

14

14

13

9.8

6.8

5.6

12

15

10

13

7.2

10

9.4

12

Iron 

(Fe)

0.04

.04

.55

.21

.32

.05

.03

.10

__

.05

.31

.25

.10

.16

.23

..

.03

_

.04

.49

.64

Calcium 

(Ca)

226

230

245

180

182

226

260

214

172

183

197

218

206

188

303

357

276

332

240

219

201

273

Magnesium 

(Mg)

201

212

229

151

136

217

260

211

157

179

156

164

207

188

136

143

221

137

216

203

191

165

Sodium 

(Na)

599

650

697

447

410

687

809

734

519

556

491

536

667

587

453

471

728

448

739

678

620

533

Potassium 

(K)

7.8

8.2

8.4

8.8

15

_

12

11

__

8.8

8.4

8.4

9.6

10

9.6

10

11

11

11

9.6

9.2

10

Bicarbonate 

(HCO,)

356

370

388

338

321

368

335

328

324

310

298

278

249

250

258

278

248

256

259

278

272

292

Sulfate 

(S0«)

2,230

2,380

2,570

1,650

1,510

2,410

2,930

2,570

1,760

2 590*

1 090 '

1,970

1,790

1,980

2,400

2,130

1,930

2,060

2,720

1,980

2,660

2,440

2,210

2,090

Chloride 

(Cl)

76

82

90

59

57

86

109

85

60

63

57

63

79

71

56

57

91

57

86

84

74

65

Flue' 

ride 

(F)

0.2

.2

.1

.2

.3

.3

.4

.5

__

.5

.4

.5

.4

.5

.5

.5

.5

.5

.3

.6

.6

0.4

Nitrate 

(NO,)

11

15

13

4.5

5.3

9.3

6.7

6.3

8.9

5.2

3.6

3.5

4.5

1.5

2.9

1.6

3.8

3.7

4.1

2.9

1.6

4.1

Boron 

(B)

Pa

p

m

lio

3,5

3,7

4,0

2,

2,4

3,

4,5

4,

2,

3,

2,

3,

3,

3,

3,

3,

4,

3,

4,

3,

3,

3,

a Not included for computation of weighted averages, 

h Determined by Schwarzenbach method.

c Represents 74 
GREEN RIVER BASIN 89

(KEEN RIVER BASIN Continued 

PRICE RIVER AT WOODSIDE, UTAH Continued

_ Temperature (°F) of water February to September 1951 

/Once-daily temperature measurement at approximately 1 p. m77

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

Average

Oct. Nov. Dec. Jan. Feb.

42

_

--

_

32

34

33

33

33

35

36

40

39

39

40

39

41

41

Mar.

37

35

42

40

44

48

48

49

44

43

44

39

44

47

47

48

41

43

46

46

_

47

49

52

54

47

46

45

53

45

Apr.

50

53

58

57

60

59

64

59

60

58

55

57

64

63

66

67

68

67

63

54

54

58

65

64

63

64

65

56

55

55

--

60

May

55

57

64

68

69

64

70

63

68

70

67

60

63

60

60

59

66

62

67

65

65

65

64

70

70

74

77

75

73

67

70

66

June

64

63

69

68

69

70

70

75

68

76

75

77

80

74

74

70

70

64

70

68

72

75

76

76

74

81

72

July

79

81

79

75

80

86

84

80

83

78

84

85

86

87

85

83

83

77

_

-.

84

82

82

78

82

80

_.

85

82

Aug.

85

84

._

65

74

75

80

75

76

77

75

75

78

76

78

77

82

84

74

75

70

70

71

68

71

70

71

68

62

69

72

74

Sept.

75

75

75

75

74

75

77

78

72

74

73

66

67

71

70

69

70

69

70

71

63

64

62

69

65

67

64

59

66

67

70
GREEN RIVER BASIN Continued 

GREEN RIVER AT GREEN RIVER, UTAH

LOCATION. At gaging station, 1 mile southeast of town of Green River, Emery County, 22 miles upstream 

DRAINAGE AREA. 40,600 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: August 1928 to September 1951.

Water temperatures: April 1949 to September 1951.

Sediment records: May 1930 to September 1951. 

EXTREMES, 1950-51 . Dissolved solids: Maximum, 913 ppm Jan. 11-20; minimum, 267 ppm July 1-10.

Hardness: Maximum, 446 ppm Jan. 11-20; minimum, 164 ppm July 1-10.

Specific conductance: Maximum daily, 1,370 micromhos Jan. 9; minimum daily, 364 micromhos June 30.

Water temperatures: Maximum observed, 81°F July 26, 31; minimum, freezing point on several days durin

Sediment concentrations: Maximum daily, 38,800 ppm Aug. 4; minimum daily, 34 ppm Sept. 27.

Sediment loads: Maximum daily, 1,200,000 tons Aug. 4; minimum daily, 151 tons Jan. 14. 

EXTREMES, 1928-51.--Dissolved solids: Maximum, 2,010 ppm Sept. 29, 1943; minimum, 194 ppm June 21-30, 1

Hardness: Maximum, 488 ppm Dec. 21-31, 1932; minimum, 128 ppm June 21-30, 1933.

Specific conductance (1941-51): Maximum daily, 2,420 micromhos Sept. 29, 1943; minimum daily 321 micr

Water temperatures (1949-51): Maximum observed, 82°F July 31, Aug. 5-6, 1949; minimum, freezing point 

Sediment concentrations (1930-51): Maximum daily, 63,600 ppm July 11, 1936; minimum daily, 34 ppm Sep

Sediment loads (1930-51): Maximum daily, 2,230,000 tons July 11, 1936, minimum daily, less than 100 t

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduct

Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given in W

Chemical analyses, in parts per million, water year October 1950 to Sept

Date of collection

Oct. 11-20...... ......

Dec. 11-20 ...........

Feb. 20-28 ...........

Mar. 11-20.......... .

Mar. 21-31...........

Mean 

discharge 

(cfs)

2,614 

2,528 

2,349 

2,486 

2,532 

3,358

2,991 

2,899 

2,478 

1,434 

1,671 

2,371

2,085 

3,339 

3,713 

3,210 

3,306 

3.451

Temperature 

(°F)

Silica 

(Si02)

11 

10 

9.7 

11 

11 

13

13 

12 

13 

14 

15 

14

14 

12 

11 

13 

13 

12

Iron 

(Fe)

Calcium 

(Ca)

76 

74 

74 

78 

79 

80

74 

78 

80 

91 

98 

89

81 

73 

66 

77 

78 

80

Magnesium 

(Mg)

38 

39 

41 

43 

42 

38

37 

40 

38 

47 

49 

41

41 

37 

35 

36 

36 

36

Sodium 

(Na)

Potassium 

(K)

97 

98 

105 

106 

105 

93

91 

93 

92 

115 

121 

98

96 

92 

93 

92

87 

87

Bicarbonate 

(HCO,)

222 

222 

226 

234 

244 

252

234 

243 

242 

279 

297 

266

258 

226 

206 

238 

242 

247

Sulfate 

(SO,)

304 

299 

322 

330 

325 

301

294 

310 

306 

374 

390 

323

299 

280 

272 

289 

277 

278

Chloride 

(Cl)

40 

40 

42 

42 

42 

40

40 

41 

41 

50 

55 

46

41 

38 

38 

39 

38 

37

Fluo* 

ride 

(F)

Nitrate 

(NOS)

1.0 

.6 

.2 

.9 

.9 

1.6

1.3 

1.6 

1.6 

1.9 

1.4 

1.4

1.6 

1.7 

1.5 

1.7 

1.9 

2.9

B

ro

(B
Apr. 11-20 ...........

Apr. 21-30 ...........

May 11-20............

June 21-30. ...........

July 1-10.............

July 21-31............

Aug. 21-31 ...........

Sept. 11-20...........

Weighted average ....

5,746

a 8, 286

b 5, 948

1 9

1 9

9 9

12

44

61

1 °i

1 °i

91

09

1ft

9fl

00

23

OR

22

28

7

51

Q

"

1Q9

1QQ

1QE

201

09

157

1 1

13

91

90

21

g

1.2

a Not Included for computation of weighted averages.

b Represents 80 percent of the runoff for the water year October 1950 to September 1951.
92 COLORADO RIVER BASIN

GREEN RIVER HASIN--Continued 

GREEN RIVER AT GREEN RIVER, UTAH Continued 

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

57

53

54

53

60

52

53

53

54

59

61

58

58

64

62

61

58

61

..

~

..

Nov.

49

51

46

51

51

50

43

42

39

35

37

40

--

37

42

39

46

40

41

44

42

37

41

40

36

42

Dec.

40

36

31

38

39

34

36

36

32

37

33

39

37

35

38

36

32

~

38

37

36

34

34

36

34

34

33

33

35

Jan.

32

32

33

35

34

35

34

31

34

34

35

34

32

34

34

35

34

34

34

33

36

36

36

36

35

37

32

32

34

Feb.

32

33

34

36

32

35

36

36

38

37

37

36

37

37

36

36

39

..

37

37

38

39

37

Mar.

36

36

37

40

37

44

41

41

45

44

42

43

48

45

47

46

49

44

45

46

47

45

47

48

48

49

49

46

--

44

Apr.

48

50

52

53

51

55

55

55

55

50

52

53

54

55

54

54

57

58

57

56

56

57

58

_

55

55

53

54

54

Hay

55

53

53

55

53

63

62

61

60

62

60

66

62

56

59

60

63

61

61

62

62

63

62

66

65

_

69

67

68

67

68

61

June

..

67

61

61

68

61

68

63

61

61

68

60

64

68

_

71

69

70

70

68

66

65

66

66

70

70

72

72

71

67

July

..

77

73

70

74

74

74

77

75

76

76

76

76

79

76

76

74

80

78

70

77

80

76

81

79

80

80

80

81

77

Aug.

80

78

77

74

77

77

75

78

78

78

78

74

72

71

77

76

79

74

77

73

75

78

80

73

79

74

70

68

70

74

75

Sept.

74

78

66

68

67

73

74

70

72

74

_

64

67

67

61

66

60

68

70

72

63

61

62

68

-

..

64

67

67

68
GREEN RIVER BASIN 93

GREEN RIVER BASIN Continued 

GREEN RIVER AT GREEN RIVER, UTAH Continued

Suspended sediment, water year October 1950 to September 1951

Day

1 ......

2 ......

3_ ___

4 ......

5 ......

7 

------

9 -. -

10 - 

11 

12------

13...-.-

14 

15 

16------

17 

18------

19 ------

4niU------

21------

99ft£f ------

23 

24 

25__ _ 

26------

97fit ------

no^0__.---

29------

30 ------

31 

Totai1 

------

------ 

4 ......

5 ....

6 

7 ......

g_ _ ___

10 ------

11 ......

12_. _ _

U_ _ _ 

14 ......

15 ----- -

16 -... 

17 

18 ...

jg __ _ _

20 ......

21 ...... 

22 ----- - 

23 

24 ...... 

25 ----- -

26 - 

27 

28 

29 ------ 

30 ----- - 

31 

TotalOctober

Mean

discharge

(cfs)

2,760 

2,660 

2,610 

2,580 

2,610

2,610 

2,610 

2,560 

2,560 

2,580

2,610 

2,580 

2,580 

2,560 

2,540

2,510 

2,490 

2,460 

2,490 

2,460

2,420 

2,370 

2,370 

2,370 

2,350

2,330 

2,330 

2,300 

2,300 

2,330 

2,370

77, 260

Suspended sediment

Mean 

concentration 

(ppm)

1,250 

728 

540 

398 

383

378 

287 

245 

217 

188

136 

118 

132 

116 

117

90 

87 

59 

46 

61

48 

49 

41 

110 

99

91 

127 

106 

78 

102 

99

--

Tons 

per 

day

9,320 

5,230 

3,810 

2,770 

2,700

2,660 

2,020 

1,690 

1,500 

1,310

958 

822 

920 

802 

802

610 

585 

392 

309 

405

314 

314 

262 

704 

628

572 

799 

658 

484 

642 

634

45, 626

January

1,480 

1,450 

1,500 

1,480 

1,460

1,480 

1,290 

1,300 

1,400 

1,500 

1,600 

1,480 

1,400 

1,430 

1,550

1,700 

1,800 

1,900 

1,850 

2,000 

2,100 

2,370 

2,370 

2,400 

2,400

2,400 

2,500 

2,580 

2,460 

2,300 

2,200

57,130

85 

110 

122 

83 

58

53 

46

45 

51 

91

68 

62 

43 

39 

62

72 

36 

62 

79 

99 

114 

154 

149 

137 

116 

105 

93 

144 

145 

128 

107

--

340 

431 

494 

332 

229

212 

160 

158 

193 

369

294 

248 

163 

151 

259

330 

418 

318 

395 

535 

646 

985 

953 

888 

752

680 

628 

1,000 

963 

795 

636

14,955

November

Mean

discharge

(cfs)

2,370 

2,370 

2,400 

2,460 

2,460

2,510 

2,580 

2,610 

2,560 

2,540

2,540 

2,540 

2,490 

2,490 

2,510

2,560 

2,710 

2,580 

2,440 

2,460

2,860 

3,050 

3,100 

3,210 

3,490

3,680 

3,650 

3,570 

3,510 

3,460

83, 760

Suspended sediment

Mean 

concentration 

(ppm)

92 

92 

84 

60 

66

50 

59 

46 

60 

63 

68 

66 

74 

88 

72

70 

81 

116 

121 

103

360 

396 

340 

186 

232

243 

246 

178 

197 

191

Tons 

per 

day

589 

589 

544 

399 

438

339 

411 

324 

a415 

432

466 

453 

498 

592 

488

484 

593 

808 

797 

684

2,780 

3,260 

2,850 

1,610 

2,190

2,410 

2,420 

1,720 

1,870 

1,780

33, 233

February

2,110 

2,050 

2,020 

2,000 

1,930

1,770 

1,830 

2,130 

2,370 

2,640

2,970 

2,860 

3,130 

3,180 

3,350

3,430 

3,630 

3,650 

3,850 

3,770 

3,680 

3,740 

3,770 

3,680 

3,650

3,630 

3,710 

3,790

84, 320

138 

121 

111 

98 

92 

55 

37 

39 

58 

66 

149 

208 

247 

167 

261

175 

243 

202 

304 

262 

283 

247 

262 

416 

443

369 

355 

343

--

786 

670 

605 

529 

479

263 

183 

224 

371 

470

1,190 

1,610 

2,090 

1,430 

2,360

1,620 

2,380 

1,990 

3,160 

2,670 

2,810 

2,490 

2,670 

4,130 

4,370

3,620 

3,560 

3,510

52, 240

December

Mean

discharge

(cfs)

3,400 

3,260 

3,130 

3,050 

3,050

3,100 

2,920 

2,680 

2,710 

2,610 

2,580 

2,440 

2,460 

2,610 

2,710

2,990 

3,320 

3,400 

3,320 

3,160

2,990 

2,890 

2,760 

2,640 

2,640

2,640 

2,460 

2,400 

2,300 

2,040 

1,500

86,160

Suspended sediment

Mean 

concentration 

(ppm)

232 

351 

199 

319 

176

218 

206 

191 

141 

96

89 

97 

96 

100 

102

120 

148 

160 

134 

153

102 

109 

65 

58 

65

65 

53 

42 

97 

143 

109

Tons 

per 

day

2,130 

3,090 

1,680 

2,630 

1,450

1,820 

1,620 

1,380 

1,030 

677

620 

639 

638 

a 705 

746

969 

1,330 

1,470 

1,200 

1,310

823 

851 

484 

413 

463

463 

352 

272 

602 

788 

441

33,086

March

3,680 

3,630 

3,460 

3,180 

3,070 

2,920 

2,860 

3,020 

3,070 

3,210

3,460 

3,510 

3,600 

3,460 

3,160

3,100 

3,240 

3,240 

3,240 

3,050 

2,740 

2,560 

2,560 

2,610 

3,070

3,160 

3,240 

4,020 

4,690 

4,750 

4,560

103, 120

370 

377 

326 

337 

384

287 

266 

298 

397 

434

760 

753 

750 

749 

640

720 

1,080 

794 

644 

571 

481 

493 

1,410 

880 

784

600 

600 

700 

1,400 

1,500 

2,600

--

3,680 

3,690 

3,050 

2,890 

3,180

2,260 

2,050 

2,430 

3,290 

3,760

7,100 

7,140 

7,290 

7,000 

5,460

6,030 

9,450 

6,950 

5,630 

4,700 

3,560 

3,410 

9,750 

6,200 

6,500

5,120 

a 5, 250 

7,600 

18, 100 

19, 200 

32, 000

213,720

a Computed from estimated concentration graph.
94 COLORADO RIVER BASIN

GREEN RIVER BASIN--Cohtinued

GREEN RIVER AT GREEN RIVER, UTAH Continued

Suspended sediment, water year October 1950 to September 1951--Continued

Day

g

9 ......

19

14 

1 *\

1 ft

91

99

9A

9c

9ft

97

MQ

29

Totalis .

is

10

Oft

21 ....

22 

23 - 

24 - 

25 ------

26 

27 ----- - 

28 ------ 

29 ----- 

30 ------ 

31 ......

Total

April

Mean

charge

(da)

4,780 

5,000 

4,870 

4,500 

4,320 

4,200 

4,260 

4,410 

4,940 

5,810

6,160 

6,330 

6,400 

6,160 

5,850

5,610 

5,380 

5,060 

4,900 

5,610

6,650 

6,870 

7,120 

7,990 

9,070

9,240 

8,700 

8,660 

9,280 

9,280

187,410

Suspended sediment

Mean 

concentration 

(ppm)

4,940 

4,100 

3,650 

3,200 

3,620

3,000 

2,180 

1,580 

1,420 

1,900

2,600 

3,450 

2,900 

2,830 

1,820

1,770 

1,590 

1,130 

982 

971

1,270 

1,300 

1,300 

1,670 

2,180

2,070 

2,250 

2,000 

1,750 

1,970

Tons 

per 

day

63,800 

55,400 

48,000 

38,900 

42,200

34,000 

25,100 

18,800 

18,900 

29,800

43, 200 

59,000 

50,100 

47, 100 

28, 700

26,800 

23, 100 

15,400 

13, 000 

14, 700

22, 800 

24, 100 

25,000 

36, 000 

53, 400

a 51, 600 

52,900 

46, 800 

43, 800 

49,400

1,101, 800

July

17, 500 

16, 400 

15,300 

14, 600 

14,000

13, 500 

12,800 

12, 200 

11,500 

10,800

10, 600 

10, 500 

10, 100 

9,620 

9,200

8,820 

8,740 

8,780 

8,220 

7,490

7,420 

7,190 

7,450 

8,140 

7,680

7,720 

8,540 

8,580 

8,140 

7,600 

7,080

316,210

1,150 

1,040 

1,210 

1,160 

1,020

1,100 

930 

826 

800 

450

350 

500 

550 

500 

500

400 

600 

560 

600 

616

2,300 

1,000 

700 

3,400 

10, 500

6,550 

2,900 

2,200 

1,720 

1,350 

1,560

--

Total discharge for year (cfsTotal load for year (tons). ....

54, 300 

46,100 

50,000 

45,700 

38,600

40, 100 

32, 100 

27,200 

24,800 

13, 100 

10,000 

14,200 

15,000 

13,000 

12,400

9,530 

14, 200 

13,300 

13,300 

12,500

46, 100 

19,400 

14, 100 

74, 700 

218,000

137,000 

66,900 

51,000 

37,800 

27,700 

29,800

1,221,930

May

Mean

discharge

(cfs)

9,110 

8,860 

8,820 

9,070 

9,200

9,030 

8,180 

7,380 

7,160 

7,990

9,920 

11,400 

11,900 

11,800 

12, 300

13,500 

13,900 

13,800 

14,200 

15,400

15,700 

15,500 

16,800 

18,800 

20,000

20, 700 

22,000 

23,400 

25,000 

26, 500 

27,400

444,720

Suspended sediment

Mean 

concentration 

(ppm)

1,980 

1,450 

1,240 

1,270 

1,140

966 

593 

734 

651 

530

900 

1,400 

1,150 

2,020 

2,150

1,700 

2,100 

2,050 

2,170 

3,700

3,400 

2,850 

3,800 

4,100 

3,000

3,700 

3,680 

3,670 

3,350 

3,400 

4,800

--

Tons 

per 

day

48,700 

34, 700 

29,500 

31, 100 

28,300

23,600 

13,100 

14, 600 

12,600 

11,400

24, 100 

43,100 

36,900 

64,400 

71,400

62,000 

78,800 

76, 400 

83,200 

154, 000

144, 000 

119, 000 

172,000 

221,000 

181,000

207,000 

219,000 

232,000 

226, 000 

a 243, 000 

355, 000

3,257,520

August

6,720 

7,300 

7,830 

11,100 

10, 100

8,580 

8,420 

8,100 

8,060 

7,990

7,870 

7,380 

6,900 

6,470 

6,050

5,610 

5,220 

4,780 

4,500 

4,260

4,050 

4,140 

4,290 

4, 780 

4,530

4,470 

4,050 

3,880 

4,750 

4,320 

4,410

190,910

920 

6,380 

7,760 

38,800 

30, 300

10,000 

6,750 

5,870 

4,900 

3,900

3,800 

2,820 

1,900 

1,500 

990

400 

326 

457 

440 

400 

322 

980 

1,050 

6,620 

5,000

4,500 

4,000 

4,520 

9,270 

6,850 

2,230

--

16, 700 

s 172, 000 

s 169, 000 

si ,200, 000 

s 962, 000

232,000 

153,000 

128,000 

107,000 

84, 100 

80,700 

56, 200 

35,400 

26, 200 

a 16, 200

6,060 

4,590 

5,900 

5,350 

4,600

3,520 

11,000 

12,200 

s 85, 800 

61, 200

54, 330 

43, 700 

47,400 

s 128, 000 

79, 900 

26, 600

4,018,620

June

Mean

charge

(cfs)

28,700 

30,000 

30,300 

30, 200 

29,500 

27,600 

24, 600 

21,800 

19,600 

18,200

17,300 

16,500 

15,800 

15,200 

14,600

14, 600 

15, 400 

16, 900 

18,800 

20,600

22,500 

25, 200 

26,400 

26, 500 

25,700

24,400 

23, 100 

21, 500 

19,900 

18,600

660, 000

Suspended sediment

Mean 

concentration 

(ppm)

4,040 

3,410 

3,150 

2,660 

2,430

2,960 

2,840 

2,530 

2,530 

1,630

1,740 1,810' 

1,550 

1,500 

780

650 

2.&50 

3,500 

1,450 

2,150

2,250 

4,200 

3,600 

2,870 

2,350

2,000 

900 

450 

430 

580

--

Tons 

per 

day

313,000 

276, 000 

258,000 

217,000 

194, 000

221,000 

189,000 

149,000 

134,000 

80, 100

81, 300 

80, 600 

66,100 

61,600 

30,700

25,600 

110,000 

160, 000 

73,600 

120,000

137,000 

286, 000 

257,000 

205, 000 

163,000

132,000 

56, 100 

26, 100 

23, 100 

29,100

4,155,000

September

6,120 

4,870 

4,260 

3,910 

3,680

3,650 

3,820 

3,940 

3,680 

3,400

3, 180 

3,020 

2,890 

2,790 

2,710

2,640 

2,580 

2,490 

2,420 

2,370 

2,300 

2,260 

2,210 

2,170 

2,100

2,060 

2,040 

2,020 

2,020 

1,980

89, 580

1,150 

9,550 

12, 700 

5,630 

2,900

1,220 

602 

577 

525 

436

580 

700 

580 

578 

463

400 

240 

205 

157 

160

82 

73 

59 

71 

54

45 

34 

43 

65 

49

--

19,000 

126, 000 

146, 000 

59,400 

28,800

12,000 

6,210 

6,140 

5,220 

4,000

4,980 

5,710 

4,530 

4,350 

3,390

2,850 

1,670 

1,380 

1,030 

1,020 

509 

445 

352 

416 

306

a 250 

187 

235 

355 

262

446,997

2, 380, 580 

14,594,727

a Computed from estimated concentration graph, 

s Computed by subdividing day.
GREEN RIVER BASIN Continued 

GREEN RIVER AT GREEN RIVER, UTAH Continued

Particle-size analyses of suspended sediment, April to August 

(Methods of analysis; B, bottom withdrawal tube; D, decantation; P, pipette; S, 

W, in distilled water; C, chemically dispersed; M, mechanically d

Date of collection

Aug. 23. ..................

Time

1:50 p.m. 

4:30 p.m. 

5:40 p.m. 

4:55 p.m. 

11:20 a.m. 

9:25 a.m. 

9:00 a.m.

9:00 a.m. 

5:45 p.m. 

3:20 p.m. 

5:30 p.m.

4:30 p.m. 

4:30 p.m. 

9:00 a.m. 

9:00 a.m. 

4:30 p.m.

Water 

discharge 

(cfs)

8,030 

R.910 

15,600 

22, 400 

29, 600 

17, 400 

18, 600

16,600 

10, 000 

8,100 

5,880

8,420 

R.420 

6,980 

4,440 

4,260

Suspended sedim

C oncentration 

of sample 

(ppm)

1,940 

900 

2,960 

3,450 

1,730 

1,550 

1,510

1,230 

R16 

578 

4,450

13,900 

13,900 

1,830 

414 

1,540

Concentration 

of suspension 

analyzed 

(ppm)

2,030 

1,520 

1,980 

3,760 

1,640 

1,420 

1,720

1,060

1,050 

5,480

3,820 

3,420 

2,060

2,640

Percent finer th

0.002

29

22

14 

15

13

34

41 

38

--

0.004

32 

32 

28 

25 

27 

15 

22

15

46 

64

55 

49 

40

88

0.008

40

31 

17 

26

18

58

64 

60

--

0.016

53 

50 

41 

41 

37 

21 

34

21

70 

98

72 

59

96

0.0
GREEN RIVER BASIN Continued 

SAN RAFAEL RIVER NEAR GREEN RIVER, UTAH

LOCATION.--At gaging station just downstream from bridge on State Highway 24, 15 miles southwest of Gree

DRAINAGE AREA.--1,690 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: November 1946 to September 1949, November 1950 to September 1951

Water temperatures: July to September 1949, October 1950 to September 1951.

Sediment records: March 1948 to September 1949, October 1950 to September 1951. 

EXTREMES, 1950-51 . Dissolved solids: Maximum, 5,010 ppm May 1-10; minimum, 670 ppm June 1-3.

Hardness: Maximum, 2,000 ppm May 1-10; minimum, 368 ppm June 1-3.

Specific conductance: Maximum daily, 6,120 micromhos May 13; minimum daily, 897 micromhos May 31.

Water temperatures: Maximum observed, 90°F July 19; minimum, freezing point on many days during Decem

Sediment concentrations: Maximum daily, 115,000 ppm Aug. 4; minimum daily, 18 ppm July 20.

Sediment loads: Maximum daily, 786,000 tons Aug. 4; minimum daily, 1 ton July 20. 

EXTREMES, 1949-51.--Dissolved solids: Maximum, 5,010 ppm May 1-10, 1951; minimum, 670 ppm June 1-3, 195

Hardness: Maximum, 2,000 ppm May 1-10, 1951; minimum, 368 ppm June 1-3, 1951.

Specific conductance: Maximum daily, 6,120 micromhos May 13, 1951; minimum daily, 849 micromhos June 

Water temperatures: Maximum observed, 90°F July 19, 1951; minimum, freezing point on many days during 

Sediment concentrations (1948-51): Maximum daily, 115,000 ppm Aug. 4, 1951; minimum daily, 0 ppm (no 

Sediment loads (1948-51): Maximum daily, 786,000 tons Aug. 4, 1951; minimum daily, 0 tons Sept. 5 to 

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of specific 

fice at Salt Lake.City, Utah. Records of discharge for water year October 1950 to September 1951 giv

Chemical analyses, in parts per million, November 1950 to September 

Date of collection

Nov. 14-20, 1950.... 

Nov. 21-30. .........

Dec. 1-2, 4, 7, 9. .... 

Dec. 11-20. .........

Jan. 1, 3-5, 8-9, 1951 

Jan. 11-20..........

Feb. 1-10. ..........

Feb. 11-19... .......

Feb. 20-28. .........

Mar. 2-3, 5-7, 9. .... 

Mar. 12, 14, 16, 19-20

Apr. 1-10. ..........

Apr. 21-30. .........

Mean 

discharge 

(cfs)

32.7 

54.4 

43.4 

49.5 

45.0

40.0 

40.0 

40.0 

48.8 

53.9 

51.6

52.5 

32.2 

25.9 

25.3 

13.9 

21.8

Silica 

(Si02)

11 

11 

10 

11 

10

11 

12 

11 

11 

10 

10

11 

9.5 

8.2 

8.8 

7.6 

6.3

Iron 

(Fe)

0.02 

.02 

.03 

.06 

.03

.05 

.05 

.03 

.04 

.04 

.04

.12 

.16 

.10 

.04 

.03 

.05

Calcium 

(Ca)

320 

268 

258 

258 

278

297 

311 

252 

273 

204 

238

260 

296 

310 

322 

322 

320

Magnesium 

(Mg)

250 

207 

207 

189 

207

211 

210 

168 

177 

127 

150

187 

212 

227 

261 

267 

265

Sodium 

(Na)

709 

582 

538 

489 

560

565 

545 

439 

487 

360 

436

545 

637 

680 

805 

809 

794

Potassium 

(K)

10 

11 

8.4 

7.6 

8.0

8.4 

6.8 

8.4 

8.0 

7.6 

7.4

18 

24 

25 

15 

12 

13

Bicarbonate 

(HCO,)

345 

330 

336 

342 

378

413 

449 

399 

419 

318 

332

338 

340 

334 

323 

315 

305

Sulfate 

(S04 )

2,820 

2,340 

2,230 

2,040 

2,260

2,310 

2,290 

1,820 

2,010 

1,430 

1,740

2,160 

2,540 

2,710 

3,110 

3,160 

3.060

Chloride 

(Cl)

79 

63 

61 

54 

65

67 

70 

53 

59 

40 

46

61 

71 

81 

93 

103 

92

Fluoride 

(F)

0.4 

.4 

.4 

.5 

.4

.2 

.2 

.2 

. 1 

.1 

.2

.0 

.0 

.0 

.3 

.5 

.6

Nitrate 

(NO,)

4.0 

4.4 

3.5 

4.1 

4.1

4.7 

4.4 

4.3 

5.0 

4.2 

3.7

3 9 

2^0 

2.5 

1.5 

1.0 

. 5

Boron 

(B)

Pa

pe

mi

lio

4,

3,

3

3

3

3,

3

2

3,

2,

2,

3

3

4

4

4

4
May 11-16, 18-20....

June 4-10 ...........

June 11-20..........

July 1-10. ....... ....

July 11-20 ..........

July 21 .............

July 22-31, Aug. 1...

Aug. 21-22, 24-28, 30-

Sept. 11-20 .........

Sept. 21-30 .........

Weighted average. . .

36.5

323

64.2

27.5

a 100

36.4 

179

36.0

a 81. 5

12.4

C76.6

9.4

11

11

9.2

15

14

6.5

11

.04

.06

.07

.04

.13

.04

.04

0.07

312

85

120

190

320

288

332

193

259

72

184

194

244

124

849

77

175

616

562

758

342

5.6

6.8

15

5.6

8.0

314

244

284

274

256

212

253

240

268

292

3,190

I

QQrt

684

693

1,650

1,300

2,500

2,350

3,000

1,390

92

EQ

OQ

20

44

25

64 

39

59

90

39

.6

.4

.4

.4

.4

.4

.7

.4

.4

0.4

1.0

.8

1.0

.7

1.2

1.1

.8 

1.9

1.5

.6

1.9

1.7

a Not included for computation of weighted averages.

b Determined by Schwarzenbach method.

c Represents 63 percent of the runoff for the water year October 1950 to September 1951.
98 COLORADO RIVER BASIN

GREEN RIVER BASIN Continued

SAN RAFAEL RIVER NEAR GREEN RIVER, UTAH--Continued 

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

._

._

--

--

--

_

--

--

_

--

--

--

._

--

54

62

57

62

50

60

58

55

__

57

--

--

--

Nov.

48

-_

49

50

--

51

52

42

--

39

-_

37

42

43

42

40

37

47

50

50

46

40

43

42

42

41

40

35

38

--

43

Dec.

40

38

--

40

--

_

37

40

37

39

35

36

35

_.

32

36

34

32

34

33

34

33

33

32

32

32

32

--

Jan.

33

_.

32

32

33

33

32

32

--

32

32

32

32

33

33

--

33

33

33

32

33

33

33

33

33

33

33

32

32

32

33

Feb.

32

32

33

33

32

33

33

36

_

__

33

33

33

35

37

44

42

42

41

45

45

45

--

46

38

42

-.

--

--

38

Mar.

41

40

42

_-

50

50

48

44

42

_

._

50

58

--

45

42

__

51

51

58

55

54

58

--

57

50

58

54

55

51

--

Apr.

62

59

65

60

60

57

57

57

60

50

43

52

65

68

58

71

63

62

60

58

62

68

66

60

63

51

65

66

54

58

60

May

56

61

68

70

71

68

65

68

78

80

68

65

72

58

66

69

66

71

63

64

73

68

62

65

73

71

70

67

64

61

61

67

June

56

56

60

66

72

64

68

65

65

68

72

68

71

75

78

72

74

72

72

66

64

65

63

74

73

75

81

78

75

79

--

70

July

75

80

81

72

77

79

81

71

82

76

78

82

87

79

73

81

85

88

90

80

68

70

80

85

84

78

79

78

86

86

80

80

Aug.

79

79

80

72

79

83

82

81

80

80

80

78

80

82

84

84

70

79

80

74

77

76

71

78

74

72

70

79

72

74

78

Sept.

77

--

74

72

75

74

75

80

80

75

73

--

66

--

--

..

--

74

_

--

66

67

71

70

70

64

--

--
GREEN RIVER BASIN 99

GREEN RIVER BASIN Continued

SAN RAFAEL RIVER NEAR GREEN RIVER, UTAH Continued 

Suspended sediment, water year October 1950 to September 1951

Day

4 

16 ------

1ft

20- -

25

99

Oft

9Q

Sl -

Total1 

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 

Total

October

Mean

charge

(cfs)

11 

11 

11 

13 

13

13 

13 

14 

14 

13

13 

16 

16 

15 

15

14 

16 

16 

16 

16

17 

19 

20 

22 

22

23 

25 

26 

27 

26 

26

532

Suspended sediment

Mean 

concentration 

(ppm)

520 

453 

457

499 

467 

430 

537 

582 

600 

620 

600 

556 

580 

600

--

Tons 

per 

day

b!4

22 

20 

20

23 

24 

23 

32 

35

a 37 

a 42 

a 42 

41 

a41 

a 42

682

January

40

1,240

400

--

43

1,333

November

Mean

discharge

(cfs)

27 

27 

26 

27 

26

26

21 

21 

22 

26 

26 

26

33 

34 

34 

36 

40

64 

69 

61 

59 

53

48 

47 

50 

49 

44

1,100

Suspended sediment

Mean 

concentration 

(ppm)

635 

640 

666 

645 

620

640

600

703 

760 

839 

923 

968

1,220 

1,110 

1,035 

730 

880

2,990 

3,820 

2,8*80 

2,590 

1,630

1,000 

900 

1,300 

1,050 

960

Tons 

per 

day

46 

a47 

47 

47 

a 44

45

a 34

40 

a45 

59 

65 

68

109 

101 

95 

71 

95

517 

712 

474 

413 

233

130 

114 

176 

139 

114

4,215

February

35 

35 

36 

38 

40

44 

50

70 

50 

45

50 

55 

55 

56 

55

51 

45 

52

1,437

611 

564 

540 

520 

506

372 

456

1,650 

2,170 

3,200

2,500 

2,350 

2,390 

2,090 

1,740

1,500 

1,480 

1,210

58 

53 

a 52 

a 53 

55

44 

62

312 

293 

389

338 

349 

355 

316 

258

207 

180 

170

7,049

December

Mean

charge

(cfs)

45 

49 

42 

39 

37

39 

42 

35 

42

50 

45

1,410

Suspended sediment

Mean 

concentration 

(ppm)

990 

1,080 

1,020 

1,050 

1,100

1,080 

1,150 

1,110 

1,200

1,500 

780

--

Tons 

per 

day

120 

143 

al!6 

111 

allO

a!14 

130 

105 

136

202 

95

4,245

March

44 

52 

54 

50 

50

52 

55 

55 

52 

48 

43 

40 

36 

32 

33 

34 

33 

33 

27 

28

27 

30 

28 

26 

26

25 

24 

24 

25 

24 

26

1,136

1,000 

1,490 

1,390 

1,200 

1,070

2,110 

1,380 

1,100 

867 

858 

820 

795 

495 

715 

650

583 

578 

500 

386 

387

458 

610 

490 

350 

320

313 

200 

280 

300 

300 

1,590

119 

209 

203 

a 162 

144

296 

205 

a 163 

122 

111 

a95 

86 

48 

62 

a 58 

54 

51 

a45 

28 

29

33 

49 

37 

25 

a 22

21 

13 

18 

20 

19 

112

2,659

a Computed from estimated concentration graph. 

b Computed from water-sediment discharge curve.
100 COLORADO RIVER BASIN 

GREEN RIVER BASIN Continued

SAN RAFAEL RIVER NEAR GREEN RIVER, UTAH Continued 

Suspended sediment, water year October 1950 to September 1951--Continued

Day

5 .

10 

19

15 

ne

27

no

31 

Total9 ......

10 

11 ......

12 

13 

14 

15 

16 

17 

18 

19 

21 

22 

23 

24 ----- 

25 

26 

27 

28 ----- 

29 -----

30 

31 

Total

April

Mean

charge

(cfs)

26 

29 

35 

32 

25

22 

24 

23 

20 

17 

18 

18 

18 

13 

11

11 

11 

11 

13 

15

29 

24 

24 

22 

19

19 

19 

21 

21 

20

610

Suspended sediment

Mean 

concentration 

(ppm)

1,560 

860 

420 

294 

280

395 

311 

314 

215 

238

288 

230 

176 

154 

130

130 

125 

159 

175 

225

560 

340 

288 

222 

186

148 

274 

356 

222 

251

--

Tons 

per 

day

110 

67 

40 

25 

19

23 

20 

19 

12 

11

14 

11 

9 

5 

4

4 

4 

5 

6 

9

44 

22 

19 

13 

10

8 

14 

20 

13 

14

594

July

138 

108 

85 

67 

52

45 

47 

36 

33 

31 

30 

30 

27 

26 

25

24 

26 

27 

30 

30

100 

40 

35 

32 

29 

26 

29 

38 

54 

30 

40

1,370

1,780 

1,100 

756 

963 

294

406 

313 

267 

232 

232 

173 

154 

129 

157 

157

75 

82 

35 

42 

18

4,300 

9,700 

11, 500 

17, 300 

9,500 

2,300 

3,400 

4,350 

6,700 

3,400 

2,800

--

Total discharge for year (cfsTotal load tor year (tons)

663 

321 

174 

174 

41

49 

40 

26 

21 

19 

14 

12 

9 

11 

11 

5 

6 

3 

3 

1

1,160 

1,050 

1,090 

1,490 

744 

161 

s328 

sc703 

977 

275 

302

9,883

May

Mean

charge

(cfs)

18 

18 

19 

16 

15

14 

12 

9.9 

9.0 

9.5

9.9 

9.9 

10 

21 

35

69 

69 

67 

55 

52

59 

130 

220 

287 

245

378 

643 

1,130 

1,310 

1,230 

1,190

7,360.2

Suspended sediment

Mean 

concentration 

(ppm)

232 

274 

187 

175 

150

153 

154 

171 

190 

130

247 

170 

200 

2,860 

3,900

6,710 

12, 900 

7,950 

4,000 

2,400

3,450 

8,400 

12, 300 

21,000 

10, 800

13,500 

20, 600 

19, 200 

18, 600 

13,200 

9,700

Tons 

per 

day

11 

13 

10 

8 

6

6 

5 

5 

5 

3

7 

5 

5 

s217 

369

si, 340 

2,400 

1,440 

594 

337

550 

2,950 

s9,090 

c 16, 300 

7,140

13, 800 

35, 800 

58,600 

65, 800 

43, 800 

31, 200

291,816

August

62 

55 

287 

2,250 

1,130

331 

207 

154 

117 

85 

72 

59 

45 

37 

30

26 

23 

22 

22 

24

22 

57 

100 

102 

164 

72 

52 

40 

63 

186 

98

5,994

4,600 

2,600 

17,800 

115,000 

68,800

23,000 

10, 000 

3,750 

2,900 

2,100 

1,500 

1,110 

1,000 

600 

227

550 

550 

238 

244 

650

500 

15,900 

23, 700 

26, 200 

40, 000 

57, 000 

45, 100 

28, 800 

32, 800 

39, 600 

24,000

--

s934 

386 

sc 21, 900 

sa 786, 000 

s 241, 000

20, 600 

5,590 

1,560 

916 

482 

292 

177 

122 

60 

18

39 

34 

14 

14 

42

30 

sc3, 170 

c 6, 4.00 

c7, 220 

17, 700 

11,100 

6,330 

3,110 

s6,390 

s 23, 700 

6,350

1,171,680

June

Mean

charge

(cfs)

975 

736 

531 

411 

339

311 

301 

291 

328 

325 

332 

328 

353 

346 

371

437 

445 

519 

555 

476

460 

426 

393 

325 

284

268 

225 

200 

182 

165

11,638

Suspended sediment

Mean 

concentration 

(ppm)

8,550 

7,200 

6,600 

3,800 

3,200

4,180 

4,550 

4,000 

3,700 

3,300

2,940 

3,810 

3,680 

3,120 

3,500

3,120 

2,800 

5,650 

5,550 

4,130

3,150 

2,550 

3,100 

1,830 

2,200

2,430 

2,400 

2,600 

2,000 

2,800

--

Tons 

per 

day

22,500 

14, 300 

9,460 

4,220 

2 930

3,510 

3,700 

3,140 

3,280 

2,900

2,640 

3,370 

3,510 

2,910 

3,510

3,680 

3,360 

7,920 

8,320 

5,310

3,910 

2,930 

3,290 

1,610 

1,690 

1,760 

1,460 

1,400 

983 

1,250

134, 753

September

58 

45 

38 

33 

31

28 

23 

25 

22 

21 

19 

16 

15 

15 

15

14 

14 

13 

12 

12

12 

11 

10 

10 

11 

13 

12 

14 

16 

15

593

14, 800 

7,900 

3,290 

1,400 

1,000

820 

520 

239 

104 

105 

230 

59 

148 

137 

121

140 

160 

192 

100 

102

100 

141 

122 

123 

146 

144 

139 

113 

271 

138

--

2,240 

a 960 

338 

125 

84

62 

32 

16 

6 

6 

12 

3 

6 

6 

5 

a.5 

6 

7 

a3 

3

3 

4 

3 

3 

4 

5 

5 

4 

12 

6

3,974

34,420.2 

1,632,883

s Computed by subdividing day.

a Computed from estimated concentration graph.

c Computed from partly estimated concentration graph.
GREEN RIVER BASIN Continued 

SAN RAFAEL RIVER NEAR GREEN RIVER, UTAH Continue

Particle-size analyses of suspended sediment, April to August 1

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S, 

W, in distilled water; C, chemically dispersed; M, mechanically d

Date of collection

Apr. 30, 1951. ..........

May 14 .................

May 21 .................

May 28 .................

June 5. .................

June 18. ................

July 2 ..................

July 25. ................

Aug. 13 ................

Aug. 28 ................

Time

2:40 p. m. 

2:20 p.m. 

2:20 p. m. 

3:15 p. m. 

3:00 p. m. 

2:30 p.m. 

3:55 p. m. 

3:05 p.m. 

3:15 p.m. 

3:15 p. m. 

11:00 a. m. 

4:00 p. m. 

3:00 p. m.

Water 

discharge 

(cfs)

19 

59 

59 

54 

1.160 

335 

325 

464 

94 

35 

325 

48 

40

Suspended sedime

Concentration 

of sample 

(ppm)

214 

27,400 

27,400 

3,680 

18, 300 

3,050 

2,510 

4,820 

854 

7,110 

23, 300 

807 

26, 200

Concentration 

of suspension 

analyzed 

(ppm)

2,390 

3,630 

3,380 

4,200 

3,910 

3,420 

2,780 

2,740 

1,020 

4,440 

9,100 

1,120 

3,210

Percent finer th

0.002

53 

43 

42

15 

12

18 

5

0.004

56 

51 

50 

81 

23 

18 

15 

16 

24 

89 

61 

8 

82

0.008

75 

57 

60

26 

19

30 

9

0.016

86 

69 

70 

94 

43 

29 

24 

28 

37 

97 

86 

31 

86

0.03
DIRTY DEVIL RIVER BASIN 

DIRTY DEVIL RIVER NEAR HITE, UTAH

LOCATION. Samples collected near the mouth, above backwater of the Colorado River, about 9 miles upstrea

from gaging station. 

RECORDS AVAILABLE. Chemical analyses: October 1947 to September 1951.

Water temperatures: May 1949 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 6,070 ppm July 12, 17, 19; minimum, 1,240 ppm Dec. 21-31, 

Hardness: Maximum, 3,030 ppm July 12, 17, 19; minimum, 730 ppm Feb. 1-10.

Specific conductance: Maximum daily, 8,530 micromhos July 10; minimum daily, 1,440 micromhos Jan. 20.

Water temperatures: Maximum observed, 93°F Aug. 18; minimum observed, freezing point Jan. 8, Feb. 2-4. 

EXTREMES, 1947-51. Dissolved solids: Maximum, 6,310 ppm June 21-30, 1950; minimum, 708 ppm March 21-24, 

Hardness: Maximum, 3,030 ppm July 12, 17, 19, 1951; minimum, 454 ppm March 21-24, 26-31, 1948.

Specific conductance: Maximum daily, 9,070 micromhos June 23, 1950; minimum daily, 898 micromhos Feb. 

Water temperatures: Maximum observed, 97°F July 2, 1950; minimum observed, freezing point on several d

REMARKS.--Prior to July 8, 1948, samples were collected at gaging station near Hanksville. Values report

uents. Records of specific conductance of daily samples available in district office at Salt Lake Cit

Chemical analyses in parts per million, water year October 1950 to Septem

Date of collection

Oct. 1-10, 1950. .

Nov. 1-10 .......

Nov. 11-20......

Nov. 21-30......

Dec. 1-10. ......

Dec. 11, 14-15, 18 

20... ..........

Dec. 21-31......

Jan. 3-8, 1951. . .

Feb. 1-10. ......

Feb. 11-13, 20 . . 

Feb. 21-28.. ....

Mar. 11-20..... .

Mar. 21-31.... ..

Mean 

discharge 

(cfs)

Silica 

(SiOa)

23 

23 

25 

23 

22 

26

28

26 

28 

28 

29 

33 

28

24 

28 

28 

30 

31 

34

Iron 

(Fe)

0.04 

.05 

.04 

.03 

.06 

.05

.05

.04 

.06 

.05

.06 

.07

.08 

.07 

.06 

.05 

.05 

.04

Calcium 

(Ca)

364 

318 

308 

286 

282 

298

255

250 

219 

236 

301 

228 

222

212 

236 

230 

218 

221 

2OQ

Magnesium 

(Mg)

59 

56 

56 

53 

56 

61

54

56 

49 

56 

82 

55 

45

49 

49 

49 

49 

54 

W

Sodium 

(Na)

126 

121 

128 

110 

108 

137

113

132 

103 

129 

27 

100 

99

135 

134 

132 

141 

150 

I'M

Potassium 

(K)

9.2 

8.4 

6.8 

6.0 

6.0 

6.0

8.0

6.8 

6.0 

8.8 

3 

9.2 

11

12 

10 

9.6 

6.4 

7.6 

S 4

Bicarbonate 

(HCO,)

186 

184 

186 

194 

206 

222

208

202 

207 

214 

256 

213 

187

188 

181 

194 

206 

211

 >m

Sulfate 

(S04 )

1,070 

956 

919 

847 

840 

868

759

777 

629 

705 

900 

671 

644

654 

717 

697 

667 

691 

««

Chloride 

(Cl)

110 

105 

114 

88 

86 

127

116

128 

106 

144 

378 

101 

98

132 

125 

134 

137 

139 

1S4

Fluoride 

(F)

0.4 

.5 

. 5 

.3 

.3 

.3

.2

.2 

.3

.2

.2 

.3

.3 

.4 

.4 

.2 

.3 

H

Nitrate 

(NO,)

1.3 

1.4 

1.0 

1.5 

2.1 

3.1

2.4

2.9 

2.3 

3.0 

2.9 

2.9 

2.8

3.1 

2.9 

3.0 

3.2 

2.9 

1 Q

Boron 

(B)

Dis

Parts 

per 

million

1,850 

1,680 

1,650 

1,510 

1,500 

1,640

1,440

,480 

,240 

,420 

,090 

,310 

,240

1,310 

1,390 

1,380 

1,350 

1,400 

1 37fl
A r 1 10

Apr. 11, 15-17, 20 

Apr. 22-24, 29-30 

Apr. 25-28......

May 13, 15-16 . . .

June 1-10 .......

June 21-25 ......

June 28-30 ......

July 3-4, 6...... 

July 1-2, 5, 9 ... 

July 7-8, 10-11 .. 

July 12, 17, 19 . . 

July 26-31. ......

Aug. 1, 3-6, 10. . . 

Aug. 11-20......

Aug. 21, 23-27, 2$ 

31... ..........

Aug. 22, 30 .....

Sept. 11-20......

Sept. 21-22, 27-28

21

24

32

32

27 

25

25

20 

20 

23 

31

22

20

16

9<3

27

08

.07 

.07

.04 

.05

no

.04 

.03 

.05 

.09

.04

.06

233

237 

245

270

273 

490

576

246 

278 

538 

755

610

300

407

65 

70

75

82

128

83 

111 

183 

278

108

47

70

66

204

175 

181

194

345 

440 

831 

835

324

1

167

153

9.3 

19

10

l)ft

22 

25 

44 

52

13

28

14

212 

208

190

194

1 HA

311 

294 

505 

535 

Qi n

284

180

1 CO

155

775 

855

970

976

678 

866 

1,640 

2,750

2,020

919

I

ftQrt

1,210

185 

192 

400

198

185

380

755

450

1,280

528 

678 

1,300 

1,100

215

82

9OR

150

.4 

.4 

.4

.4

. 5 

.6

.9

.8

.4 

.5 

.5 

.7

. 5 

. 5

. 5

. 5

1.1 

.4 

.7

.2

4.4

2.5

1.6 

1.6 

2.0 

1.5

1.4

1.3

.7

.3

1

1

2

1

1

3

3

4

4

5

2

2

4

6

3

3

1

2
104 COLORADO RIVER BASIN

DIRTY DEVIL RIVER BASIN Continued

DIRTY DEVIL RIVER NEAR KITE, UTAH Continued

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

58

66

67

66

65

-_

59

70

71

68

69

67

56

__

63

67

59

60

61

63

60

63

64

58

60

59

59

--

63

Nov.

56

54

54

55

52

51

48

49

46

41

40

40

41

--

40

46

47

49

53

53

51

48

46

45

41

44

38

43

39

47

Dec.

46

41

40

43

43

40

39

40

41

41

40

._

38

40

38

39

39

41

41

38

38

37

36

--

35

33

33

35

37

33

39

Jan.

33

34

34

37

35

36

33

32

37

37

34

36

35

33

33

34

35

38

35

33

35

37

__

38

..

40

43

35

33

34

35

Feb.

33

32

32

32

33

34

34

36

37

39

43

44

42

..

_

42

43

43

45

44

44

43

44

43

43

41

39

Mar.

41

41

38

40

46

49

47

45

_.

47

47

49

51

54

56

54

50

54

53

55

..

_

52

55

59

58

56

48

54

53

53

50

Apr.

53

59

60

59

56

64

62

65

66

60

62

66

68

69

66

64

68

_.

67

66

73

72

67

66

62

63

69

63

57

64

May

59

68

68

72

75

70

71

73

75

74

__

_

64

62

58

60

67

71

73

76

78

66

67

74

74

79

78

74

65

72

70

June

66

70

72

73

75

78

79

81

81

77

88

86

82

90

92

92

91

85

88

70

78

84

87

84

76

-.

89

91

82

82

July

91

89

83

90

82

82

89

85

87

81

83

86

78

75

__

_.

--

89

84

87

82

87

90

Aug.

74

77

85

74

78

80

86

79

86

84

88

89

88

92

93

83

74

77

72

74

76

80

79

74

67

69

70

80

Sept.

77

81

80

78

81

85

80

79

76

78

79

77

78

79

80

79

81

80

72

72

67

__

_

73

70

67

67

--

77
COLORADO RIVER MAIN STEM--Continued 

COLORADO RIVER AT KITE, UTAH

LOCATION. At gaging station at Kite, Garfield-San Juan County line, a quarter of a mile upstream from 

8 miles downstream from Dirty Devil River, and 84 miles upstream from San Juan River. 

DRAINAGE AREA.--76,600 square miles, approximately. 

RECORDS AVAILABLE.--Chemical analyses: December 1950 to September 1951.

Water temperatures: May 1949 to September 1951.

Sediment records: October 1948 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 1,220 ppm Jan. 11-20; minimum, 287 ppm June 21-30.

Hardness: Maximum, 534 ppm Jan. 11-20; minimum, 164 ppm June 21-30.

Specific conductance: Maximum daily, 1,820 micromhos Jan. 18, 20; minimum daily, 398 micromhos June 

Water temperatures: Maximum observed, 83°F July 31; minimum, freezing point Feb. 2-5.

Sediment concentrations: Maximum daily, 34,300 ppm Aug. 4; minimum daily, 49 ppm Jan. 10.

Sediment loads: Maximum daily, 1,770,000 tons Aug. 4; minimum daily, 447 tons Jan. 10. 

EXTREMES, 1948-51.--Water temperatures (1949-51): Maximum observed 83 F July 31, 1951; minimum, freez

Sediment concentrations: Maximum daily, 34,300 ppm Aug. 4, 1951; minimum daily, 49 ppm Jan. 10, 195

Sediment loads: Maximum daily, 1,770,000 tons Aug. 4, 1951; minimum daily, 447 tons Jan. 10, 1951.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduc

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million, December 1950 to Septem

Date of collection

Dec. 1-10, 1950 ..

Dec. 21,24,26-28,

Jan. 1-10, 1951...

Mar. 3, 5-7, 10 . . 

Mar. 11-20 ......

Mar. 21-31. ......

Apr. 1-10........

Mav 21-31 .......

Mean 

discharge 

(els)

6,162 

6,051

5,484 

4,329 

3,795 

5,295

4,742 

6,808 

6,126 

6,168 

5,887

7,417 

7,807 

11,120 

14,090 

21,320 

37.760

Silica 

(SiO.)

13 

15

15 

14 

15 

15

16 

13 

14 

13 

13

11 

11 

14 

17 

17 

16

Iron 

(Fe)

0.06 

.05

.05 

.05 

.04 

.04

.04 

.06 

.07 

.05 

.05

.08 

.05 

.04 

.03 

.03 

.03

Calcium 

(Ca)

111 

116

108 

120 

120 

108

112 

94 

90 

90 

82

89 

76 

67 

64 

56 

59

Magnesium 

(Mg)

51 

54

50 

54 

57 

49

48 

42 

42 

42 

41

35 

33 

30 

23 

19 

18

Sodium 

(Na)

138 

159

143 

165 

193 

156

161 

135 

142 

149 

131

126 

103 

77 

64 

47 

40

Potassium 

(K)

4.0 

4.6

4.4 

5.0 

8.4 

6.4

7.2 

6.0 

4.6 

4.4 

4.2

5.3 

5.3 

6.2 

3.0 

2.4 

2.8

Bicarbonate 

(HCO,)

231 

237

226 

238 

236 

227

232 

212 

217 

218 

200

214 

204 

194 

188 

164 

166

Sulfate 

(S04 )

424 

453

414 

465 

484 

421

400 

373 

367 

361 

338

328 

263 

206 

166 

135 

125

Chloride 

(Cl)

105 

131

114 

151 

175 

135

147 

102 

109 

112 

107

100 

80 

56 

44 

30 

25

Fluoride 

(F)

0.4 

.4

.4 

.4 

.3

.3

.2 

.3 

.3 

.3 

.3

.4 

.5 

.6 

.4 

.4 

.4

Nitrate 

(NO,)

5.0 

5.4

4.6 

6.2 

5.5

5.1

5.1 

4.5 

3.5 

3.3 

3.0

5.0 

4.5 

2.8 

4.0 

4.4 

4.4

Boron 

(B)

(

Par

pe

mil

lion

1,0

1,0

9

1,1

1,2

1,0

1,0

9

9

9

8

8

6

5

4

3

3
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER AT KITE, UTAH Continued

Chemical analyses, in parts j

Date of collection

June 1-10, 1951...

July 11-20..... ...

July 26, 28-31....

Aug. 1-2, 5, 10 .. 

Aug. 11-20.......

Aug. 21-31.......

Sept. 11-20 ......

Sept. 21-22, 27-30 

Weighted average

Mean 

discharge 

(cfs)

46,010 

32,950 

47,280 

28, 080 

17, 140 

14,300

15,200 

10, 040 

7,854 

8,055 

4,915 

4,317

a 13, 910

Silica 

(SiO,)

14 

18 

18 

16 

13 

16

14 

16 

13 

14 

11 

11

15

Iron 

(Fe)

.04 

.01 

.01 

.02 

.05 

.07

.08 

.04 

.03 

.03 

.03 

.02

0.03

Calcium 

(Ca)

48 

51 

44 

47 

62 

78

101 

78 

109 

133 

106 

124

68

Magnesium 

(Mg)

14 

15 

13 

14 

17 

23

27 

27 

36 

41 

42 

52

24

Sodium 

(Na)

29 

34 

28 

31 

44 

64

78 

80 

107 

121 

128 

153

Potassium 

(K)

2.8 

3.4 

3.4 

3.6 

2.4 

3.6

4.0 

4.4 

3.2 

3.6 

4.4 

4.4

66 3.7

Bicarbonate 

(HCOS)

156 

153 

138 

136 

173 

187

191 

183 

195 

197 

190 

198

174

>er million. December 1950 to September 195

Sulfate 

(SO,)

86 

111 

90 

98 

131 

210

292 

251 

375 

482 

419 

521

195

Chloride 

(Cl)

15 

19 

16 

21 

33 

41

49 

51 

72 

75 

90 

111

47

Fluoride 

(F)

.4 

.2 

.2 

.2 

.3 

.5

.4 

.3 

.4 

.4 

.4 

.4

0.3

Nitrate 

(NO,)

3.3 

1.7 

1.5 

1.3 

1.0 

3.7

2.0 

3.4 

4.8 

5.5 

3.8 

4.6

3.2

Boron 

(B)

D

(r

Part

per 

million

2

3

2

3

4

5

6

6

8

1,0

9

1,1

5

a Represents 86 percent of the runoff for water year October 1950 to September 1951
COLORADO RIVER MAIN STEM 107

COLORADO RIVER MAIN STEM Continued

COLORADO RIVER AT KITE, UTAH Continued

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

..

63

63

64

63

63

62

63

64

64

62

64

64

67

66

67

65

64

64

62

63

63

61

62

60

62

--

--

63

Nov.

59

58

55

56

55

55

55

53

54

53

46

48

38

--

39

38

40

44

48

47

46

46

47

47

44

45

38

39

40

--

48

Dec.

43

41

43

43

40

41

40

40

40

41

40

40

41

40

40

38

39

39

38

37

38

37

~

35

35

36

35

36

34

39

Jan.

34

33

35

35

34

34

33

34

33

33

33

33

33

34

33

33

34

34

34

33

34

36

..

38

__

39

36

36

34

33

34

Feb.

33

32

32

32

32

34

34

36

37

37

39

39

39

_

39

39

40

40

41

42

42

43

43

42

42

38

Mar.

40

42

41

42

42

41

45

45

_

43

44

44

45

46

46

46

45

46

47

47

_

49

50

50

51

52

50

50

51

50

46

Apr.

50

51

57

54

54

55

57

58

59

54

54

56

56

57

59

60

61

_

_

60

60

61

61

63

63

61

60

60

61

--

58

May

58

56

61

58

60

63

63

64

65

64

..

__

64

63

61

61

61

67

66

68

68

66

66

65

68

68

69

70

_

68

66

64

June

64

63

62

63

62

63

63

66

64

64

67

68

67

69

70

71

71

71

70

71

71

68

68

70

72

72

72

--

67

July

71

72

72

72

73

73

74

77

76

77

75

_

..

78

78

80

78

80

81

80

._

..

_

_

--

..

81

80

81

82

83

--

Aug.

82

81

80

79

80

81

_

80

78

80

80

79

79

80

80

81

79

78

77

77

77

78

78

77

75

74

75

74

73

78

Sept.

73

72

._

_

75

75

74

74

75

75

74

72

71

70

68

72

73

71

74

73

71

69

_

_

--

67

69

67

67

68

--

72
108 COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM Continued

COLORADO RIVER AT KITE, UTAH Continued

Suspended sediment, water year October 1950 to September 1951

Day

g

16 

1ft

20 ------

99

44

9d

ne

9fi

90

9Q

31 ----- -

Total2

3 ----- 

4 .... .

6 

8- 

9 

11 

12 ----- 

13 

14 --

i tt

19 

20 

21 

22 ----- 

23 

24 ----- 

25 

26 ----- 

27 ----- 

28 ----- 

29 ----- 

30 

31. ....

Total

October

Mean

discharge

(cfs)

6,230 

6,000 

5,720 

5,410 

5,260

5,240 

5,240 

5,170 

5,150 

5,120

5,010 

5,010 

5,000 

4,840 

4,630

4,810 

4,770 

4,520 

4,500 

4,660

4,840 

4,710 

4,770 

4,660 

4,600

4,530 

4,550 

4,530 

4,440 

4,300 

4,390

152,610

Suspended sediment

Mean 

concentration 

(ppm)

1,360 

1,220 

1,120 

1,110 

1,050

1,070 

980 

700 

573 

540

450 

391 

325 

284 

300

350 

211 

138 

116 

169

200 

125 

160 

71 

111

150 

252 

219 

200 

180 

190

Tons 

per 

day

a 22, 900 

19, 800 

17,300 

16,200 

14,900

15, 100 

13,900 

9,770 

7,970 

7,460

6,090 

5,290 

4,390 

3,710 

3,750

4,550 

2,720 

1,680 

1,410 

2,130

2,610 

1,590 

2,060 

893 

1,380

1,830 

3,100 

2,680 

a 2, 400 

a 2, 090 

a2,250

203 903

January

4,930 

4,890 

4,520 

4,520 

4,500

4,600 

4,110 

3,970 

3,870 

3,380

2,920 

2,970 

3,570 

3,920 

4,060

4,020 

3,940 

3,920 

4,160 

4,470 

4,770 

4,960 

4,910 

4,880 

5,120 

5,400 

5,560 

5,450 

5,750 

5,880 

5,560

139,480

217 

240 

210 

132 

130

140 

109 

100 

100 

49

60 

62 

100 

200 

190

160 

130 

150 

200 

230

290 

320 

320 

320 

331 

330 

332 

380 

523 

590 

547

--

2,890 

3,170 

2,560 

1,610 

1,580

1,740 

1,210 

1,070 

1,040 

447

473 

497 

964 

2,120 

2,080

1,740 

1,380 

1,590 

2,250 

2,780

3,730 

4,290 

a4,240 

a4,220 

4,580 

a4,810 

4,980 

5,590 

8 120 

9,370 

8,210

95,331

November

Mean

charge

(cfs)

4,630 

4,710 

4,710 

4,690 

4,710

4,740 

4,790 

4,820 

5,100 

5,060

4,930 

5,030 

5,150 

5,340 

5,470

5,480 

5,400 

5,610 

5,770 

5,850

5,680 

6,080 

6,310 

6,550 

6,630

6,900 

7,130 

7,040 

6,820 

6,860

167,990

Suspended sediment

Mean 

concentration 

(ppm)

195 

325 

300 

259 

244

225 

207 

207 

240 

220

178 

162 

134 

160 

180

198 

210 

230 

249

244

210 

325 

610 

783 

758

699 

690 

492 

363 

372

Tons 

per 

day

2,440 

4,130 

3,820 

3,280 

3,100

2,880 

2,680 

2,690 

3,300 

3,010

2,370 

2,200 

1,860 

a2,310 

a 2, 660

2,930 

3,060 

3,480 

3,880 

3,850

3,220 

5,340 

10,400 

13, 800 

13,600

13, 000 

13,300 

9,350 

6,680 

6,890

155,510

February

4,930 

3,770 

2,580 

2,850 

3,210

3,990 

4,930 

5,590 

6,530 

6,230

5,960 

6,330 

6,680 

6,740 

6,650

6,630 

6,530 

6,510 

6,410 

6,860

7,110 

7,210 

6,980 

6,610 

6,720 

6,880 

6,800 

6,800

165,020

430 

352 

217 

167 

130

100 

440 

735 

815 

820

784 

778 

771 

770 

770

780 

800 

830 

845 

971 

1,040 

1,140 

1,380 

1,420 

1,590 

1,330 

1,060 

970

5,720 

3,580 

1,510 

1,290 

1,130

1,080 

5,860 

11, 100 

14,400 

13,800

12,600 

13,300 

13,900 

a 14 ,000 

a 13,800

a 14, 000 

a 14, 100 

14,600 

14,600 

18,000

20,000 

22,200 

26,000 

25,300 

28,800 

24,700 

19, 500 

17, 800

386,670

December

Mean

charge

(cfs)

6,530 

6,410 

6,350 

6,370 

6,290

6,150 

6,060 

5,870 

5,870 

5,720

5,570 

5,830 

6,090 

6,080 

5,810

5,740 

5,750 

6,150 

6,570 

6,920

6,800 

6,370 

6,130 

6,090 

5,940

5,590 

5,280 

5,050 

5,000 

4,810 

4,770

183,960

Suspended sediment

Mean 

concentration 

(ppm)

392 

385 

346 

360 

339

332 

330 

273 

324 

309

340 

450 

420 

350 

273

341 

322 

379 

315 

317

313 

315 

317 

301 

300

294 

260 

217 

200 

161 

200

Tons 

per 

day

6,910 

6,660 

5,930 

6,190 

5,760 

5,510 

5,400 

4,330 

5,210 

4,770

5,110 

a 7, 080 

a 6, 910 

5,750 

4,280

5,280 

5,000 

6,290 

5,590 

5,920

5,750 

5,420 

5,250 

4,950 

a4,810

4,440 

3,710 

2,960 

2,700 

2,090 

2,580

158,540

March

6,880 

6,740 

6,410 

6,490 

6,550

6,110 

6,020 

5,900 

5,480 

5,540

5,980 

6,060 

6,270 

6,490 

6,630

6,370 

6,060 

5,920 

5,980 

5,920

6,000 

5,740 

5,470 

5,260 

5,450 

5,660 

5,770 

6,060 

6,040 

6, 2 JO 

7,080

188,560

500 

450 

370 

290 

384

372 

379 

370 

360 

350

376 

359 

680 

833 

837

738 

836 

536 

526 

454

520 

610 

706 

770 

780 

895 

972 

1,040 

993 

856 

825

-

9,290 

8,190 

6,400 

5,080 

6,790

6,140 

6,160 

5,890 

a 5, 330 

5,240

6,070 

5,870 

11,500 

14,600 

15,000

12,700 

10,400 

8,570 

8,490 

7,260

a 8, 420 

a 9, 450 

10,400 

10,900 

11,500 

13,700 

15,100 

 17,000 

16, 200 

14,400 

15,800

307,840

a Computed from estimated concentration graph.
COLORADO RIVER MAIN STEM 109

COLORADO RIVER MAIN STEM Continued

COLORADO RIVER AT KITE, UTAH Continued 

Suspended sediment, water year October 1950 to September 1951--Continued

Day

2

1ft

A4

oe

27

Oft

31 

Total1 .....

10 ----- 

11 -----

13 

| O

19

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

April

Mean

charge

(cfs)

7,910 

7,750 

7,510 

7,710 

7,730

7,320 

6,940 

6,920 

7,080 

7,300

7,270 

7,860 

8,160 

8,440 

8,440

8,210 

7,820 

7,470 

7,250 

7,150

7,270 

7,820 

9,080 

9,880 

10,800

12,000 

13,200 

13,700 

13,500 

13,900

263,390

Suspended sediment

Mean 

concentration 

(ppm)

743 

729 

863 

942 

990

957 

1,040 

1,240 

1,590 

1,580

1,600 

1,670 

1,570 

1,310 

1,490

2,020 

2,200 

1,880 

1,430 

1,220

1,110 

1,080 

1,200 

1,240 

1,190 

1,400 

1,800 

1,820 

1,970 

2,400

July

36,200 

33,700 

31,800 

29,400 

27,700

26,900 

25,800 

24,600 

22,900 

21,800

21,000 

20, 000 

19,100 

17,900 

16,800

16, 100 

15,600 

15,100 

14,800 

15,000 

15,000 

14,800 

14,800 

14,200 

15,100 

15,600 

14,800 

14,200 

14,300 

13,900 

13, 500

612,400

1,650 

1,600 

1,610 

1,570 

1,150

1,250 

1,200 

1,110 

1,370 

1,140

1,000 

1,000 

1,000 

990 

990

820 

720 

710 

690 

1,000 

990 

1,000 

1,040 

1,060 

1,210 

1,220 

1,280 

2,810 

5,490 

3,180 

1,600

Tons 

per 

day

15, 900 

15,300 

17,500 

19, 600 

20,700

18,900 

19,500 

23,200 

30,400 

31,100

31,400 

35,400 

34,600 

29,900 

34,000

44,800 

46, 500 

a37,900 

a 28, 000 

23, 600

21,800 

22, 800 

29,400 

33,100 

34,700

45,400 

a 64, 200 

67,300 

71,800 

90, 100

1,038,800

161,000 

146,000 

138,000 

125,000 

86,000

90, 800 

83,600 

73,700 

84,700 

67,100

56,700 

a 54, 000 

a 51, 600 

47,800 

44,900

35,600 

30,300 

28, 900 

27,600 

40, 500 

a 40, 100 

a 40, 000 

all, 600 

a 40, 600 

a49,300 

a 51, 400 

51,100 

108,000 

212,000 

119,000 

58,300

 2,285,200

Total discharge for year (cfsTotal load for year (tons)

May

Mean

charge

(cfs)

14,600 

14,700 

15,200 

14,700 

14,000

13,500 

13,200 

13,000 

12,200 

14,800

16,500 

17,800 

20, 200 

21,800 

22,400

22,700 

23,000 

22, 900 

22,400 

23,500

25,600 

28,300 

31,300 

32,400 

34,200

35,800 

36, 900 

39, 200 

44,400 

51,600 

55,700

769,500

Suspended sediment

Mean 

concentration 

(ppm)

1,810 

1,460 

1,450 

1,450 

1,610

1,540 

1,550 

1,610 

1,550 

1,700

2,050 

2,000 

1,930 

2,030 

2,150

2,270 

3,280 

3,480 

3,230 

2,610

1,920 

1,790 

2,300 

3,530. 

3,450 

3,500 

3,590 

4,020 

3,830 

3,530 

3,470

Tons 

per 

day

71,400 

57,900 

59, 500 

57,600 

60,900

56,100 

. 55,200 

56, 500 

55,200 

67,900

a 91, 300 

a 96, 100 

105,000 

119,000 

130,000

139, 000 

204,000 

215,000 

195,000 

166,000

133,000 

137,000 

194,000 

309, 000 

319,000

338,000 

358,000 

425,000 

a459,000 

492,000 

522,000

5,744,600

August

12,900 

12,800 

12,300 

19,000 

21,300

22, 000 

18,600 

16,200 

14,600 

13,800

12,800 

12,300 

11,900 

11, 100 

10,300

9,380 

8,800 

8,350 

7,980 

7,490 

7,170 

7,110 

6,840 

7,020 

6,980 

7,510 

7,660 

7,440 

7,340 

8,120 

13,200

350,290

1,980 

2,550 

2,750 

34,300 

18, 500

22, 500 

12, 100 

9,450 

8,300 

7,600

5,600 

3,650 

3,200 

2,750 

2,600

1,450 

900 

900 

1,200 

2,000 

2,660 

2,580 

3,700 

4,200 

3,800 

3,480 

2,820 

2,550 

6,500 

9,600 

9,280

69,000 

s 86, 900 

91,300 

31,770,000 

31,060,000

1,340,000 

a 608, 000 

a413,000 

a 327, 000 

283,000

194, 000 

121,000 

103,000 

82,400 

72,300

36,700 

21,400 

20,300 

25,900 

40,400 

51, 500 

49, 500 

68, 300 

79,600 

71,600 

70,600 

58,300 

51,200 

129,000 

210,000 

331,000

7,936,200

June

Mean

charge

(cfs)

55,300 

55,100 

54,700 

52,200 

48,700

45,800 

42,100 

38, 100 

34,700 

33,400

33,400 

32,800 

32,200 

30,700 

29,000

28,800 

29,800 

32,100 

37,600 

43,100

46,300 

50,000 

53,000 

55,200 

52,400

47,900 

44,900 

43,200 

41,100 

38,800

1,262,400

Suspended sediment

Mean 

concentration 

(ppm)

3,120 

2,950 

3,300 

3,300 

3,060

2,800 

2,560 

2,400 

1,990 

1,580

1,490 

1,530 

1,300 

1,210 

1,290

1,200 

1,350 

1,770 

1,780 

1,820

2,210 

2,250 

2,190 

2,330 

2,560

2,710 

2,350 

1,780 

1,870 

1,830

Tons 

per 

day

466,000 

439,000 

487, 000 

465,000 

402,000

346,000 

291,000 

a 247, 000 

186,000 

142, 000

134,000 

135,000 

113,000 

100, 000 

101,000

93,300 

109, 000 

153,000 

181,000 

212, 000

276,000 

304,000 

313,000 

347,000 

362,000

a350,000 

a 285, 000 

208,000 

208, 000 

192,000

7,647,300

September

11,500 

9,380 

9,540 

9,030 

7,980

7,270 

6,840 

6,530 

6,290 

6,190

5,960 

5,540 

5,170 

4,890 

4,760

4,680 

4,500 

4,600 

4,580 

4,470 

4,450 

4,380 

4,400 

4,340 

4,220 

4,210 

4,260 

4,270 

4,300 

4,240

172,770

15,800 

18,700 

15,800 

11,100 

4,600

4,130 

4,000 

5,100 

4,100 

3,300

1,550 

1,330 

1,390 

1,120 

1,100

805 

770 

560 

630 

734 

650 

440 

420 

390 

370 

341 

239 

227 

563 

720

--

491,000 

474,000 

a407,000 

a271,000 

99, 100 

81,100 

73,900 

89,900 

69,600 

55,200

24,900 

19,900 

19,400 

14,800 

14,100

10, 200 

9,360 

6,960 

7,790 

8,860 

7,810 

5,200 

a4,990 

a4,570 

a4,220 

3,880 

2,750 

2,620 

6,540 

8,240

2,298,890

4,428,370 

28,258,784

s Computed by subdividing day.

a Computed from estimated concentration graph.
COLORADO RIVER MAIN STEM--Continued 

COLORADO RIVER AT KITE, UTAH Continued

(Methods ol 

Date of collection

Aug. 20 ................

Time

4:30 p.m. 

9:15 a. m. 

11:00 a.m. 

9:45 a. m.

9:15 a. m. 

9:45 a.m. 

9:15 a.m.

9:00 a. m. 

4:30 p.m. 

6:10 p.m. 

5:30 p.m.

5:30 p.m. 

10:45 a.m. 

7:00 p.m.

Water 

discharge 

(cfs)

11,100

14,100 

23,000 

38, 700

42,900 

31,300 

52,900

31,900 

21,600 

15,400 

14,000

21,800 

12,800 

7,250

Suspended sedim

Concentration 

of sample 

(ppm)

1,040 

1,200 

2,880 

4,220

3,290 

1,580 

1,890

1,010 

1,130 

800 

3,150

27,600 

7,080 

1,890

Concentration 

of suspension 

analyzed 

(ppm)

2,800 

1,080 

1,950 

1,500

2,540 

1,190 

4,680

927

3,000

2,870 

4,320 

4,160

Percent finer 

0.002

4 

25

9

0.004

81 

52 

31 

16

35 

7 

29

10

60

45 

67 

48

0.008

10 

38

14

0.016

93 

71 

46 

38

60 

15 

47

26

76

74 

86 

94

0.
ESCALANTE RIVER BASIN 

ESCALANTE RIVER AT MOUTH NEAR ESCALANTE, UTAH

LOCATION. At gaging station in Kane County, 5.1 miles upstream from mouth, 2.2 miles down stream from 

Garfield County. 

RECORDS AVAILABLE.--Chemical analyses: March to September 1951.

Water temperatures: March to September 1951.

EXTREMES, 1951. Dissolved solids: Maximum, 495 ppm Aug. 1, 4-10; minimum, 284 ppm May 21-23, 25-31. 

Hardness: Maximum, 299 ppm Aug. 1, 4-10; minimum, 195 ppm May 21-23, 25-31.

Specific conductance: Maximum daily, 863 micromhos Aug. 4; minimum daily, 356 micromhos June. 1. 

Water temperatures: Maximum observed, 90°F June 27, July 3.

REMARKS.--Values reported for dissolved solids are residue on evaporation. Records of specific conduct

Salt Lake City, Utah. Water discharge records are not published.

Chemical analyses, in parts per million, March to September 

Date of collection

Mar. 1-10, 1951...

Apr. 21-30. .......

May 21-23, 25-31. .

Sept. 1-10 ........

Sept. 21-30 .......

Mean 

discharge 

(cfs)

Silica 

(Si02)

22 

21 

20

18 

17 

16

14 

18 

18

18 

19 

16

15 

19 

21 

16 

19 

14

14 

20 

17

Iron 

(Fe)

0.02 

.02 

.03 

.04 

.03 

.04

.04 

.03 

.05

.03 

.04 

.02

.02 

.02 

.18

.01 

.18

.02 

.03 

.04

Calcium 

(Ca)

50 

50 

50 

52 

52 

52

52 

56 

50

50 

56 

54

48 

48 

57 

82 

72 

77

60 

64 

61

Magnesium 

(Mg)

19 

19 

20 

22 

24 

23

24 

21 

17

19 

26 

28

30 

28 

27 

23 

26 

22

22 

24 

22

Sodium 

(Na)

23 

24 

25 

27 

28 

28

30 

28 

21

27 

35 

36

37 

36 

43 

34 

35 

27

33 

32 

31

Potassium 

(K)

4.0 

3.8 

4.3 

5.1 

7.0 

5.3

5.6 

4.0 

5.1

4.8 

6.1 

5.9

5.6 

6.4 

7.5 

11 

8.8 

8.8

7.2 

5.8 

4.8

Bicarbonate 

(HCOS )

173 

172 

177 

179 

180 

180

178 

188 

186

172 

179 

176

160 

155 

196 

221 

201 

200

189 

189 

178

Sulfate 

(SO,)

72 

75 

80 

88 

95 

91

97 

89 

59

77 

117 

124

132 

126 

136 

174 

150 

146

136 

130 

123

Chloride 

(Cl)

26 

28 

28 

31 

33 

33

35 

28 

21

29 

41 

44

46 

45 

42 

22 

36 

22

22 

34 

32

Fluoride 

(F)

0.3 

.3 

.1 

.2 

.2 

.2

.2 

.2 

.3

.3 

.3 

.4

.4 

.4 

.4 

.3 

.3 

.3

.3

.2 

.2

Nitrate 

(NO,)

0.7 

.4 

.7 

.8 

.6 

.6

.7 

.8 

1.0

.4 

.6 

.8

.6 

.4 

1.4 

.8 

.5 

1.2

.7 

.5 

.8

Boron 

(B)

D

(r

Part

per 

million

30

30

33

33

34

34

35

34

28

30

39

40

41

39

45

49

47

43

41

41

38
112 COLORADO RIVER BASIN

ESCALANTE RIVER BASIN Continued

ESCALANTE RIVER AT MOUTH NEAR ESCALANTE, UTAH Continued 

Temperature (°F) of water, March to September 1951

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

45

39

38

40

59

43

57

57

47

46

55

41

42

44

62

49

42

40

42

45

50

51

49

47

46

58

62

46

48

55

49

48

Apr.

65

65

56

59

67

67

71

67

58

64

53

65

75

67

73

73

72

72

69

56

74

66

66

54

63

64

58

56

54

56

~

64

May

61

65

59

80

71

63

64

65

74

82

82

64

73

65

63

71

77

72

67

63

69

71

64

66

79

72

67

75

73

74

74

70

June

59

61

72

70

70

70

80

78

83

78

75

64

82

87

83

66

76

73

80

74

63

77

65

80

79

71

90

75

73

75

74

July

79

76

90

88

89

69

85

30

83

70

87

67

86

82

86

89

68

85

80

68

89

88

70

86

78

77

85

79

74

80

Aug.

75

75

72

74

76

86

80

83

73

67

83

83

69

80

85

85

85

77

67

76

82

73

76

80

77

65

52

69

67

79

76

Sept.

70

78

78

65

76

77

80

79

71

64

_

72

77

81

62

73

76

74

63

72

75

73

70

74

63

82

71

63

72

75

73
SAN JUAN RIVER BASIN 

SAN JUAN RIVER NEAR BLANCO, N. MEX.

LOCATION. At highway bridge, half a mile downstream from gaging station which is 1 mile upstream from C

County.

DRAINAGE AREA. 3,560 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: October 1945 to September 1951.

Water temperatures: March 1949 to September 1951.

Sediment records: March 1949 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 471 ppm Aug. 15-20; minimum, 111 ppm June 1-10.

Hardness: Maximum, 222 ppm Nov. 1-10; minimum, 56 ppm June 11-20.

Specific conductance: Maximum daily, 820 micromhos Aug. 20; minimum daily, 129 micromhos May 30.

Water temperatures: Maximum observed, 78°F on several days; minimum, freezing point on several days.

Sediment concentrations: Maximum daily, 11, 300 ppm Aug. 26; minimum daily, 11 ppm Sept. 20-25.

Sediment loads: Maximum daily, 52,900 tons May 27; minimum daily, 1 ton Sept. 20-25. 

EXTREMES, 1945-51. Dissolved solids: Maximum, 1,030 ppm Aug. 16, 1947; minimum, 80 ppm July 1-8, 1949.

Hardness: Maximum 680 ppm Aug. 16, 1947; minimum, 48 ppm July 1-8, 1949.

Specific conductance: Maximum daily, 1,420 micromhos Aug. 16, 1947; minimum daily, 108 micromhos June 

Water temperatures (1949-51): Maximum observed, 78°F on several days; minimum, freezing point on seve

Sediment concentrations (1949-51): Maximum daily, 17,800 ppm Aug. 9, 1949; minimum daily, 11 ppm Sept

Sediment loads (1949-51): Maximum daily, 141,000 tons July 11, 1949; minimum daily, 1 ton Sept. 20-25

REMARKS.--Records of specific conductance of daily samples available in district office at Albuquerque, 

tions are residue on evaporation. Records of discharge for water year October 1950 to September 1951 

Chemical analyses, in parts per million, water year October 1950 to Septe

Date of collection

Oct. 1-10, 1950..

Jan. 1-10, 1951 ..

Feb. 21-28. ......

Mean 

discharge 

(cfs)

344 

195 

148 

105 

112 

139

151 

155 

116 

112 

124 

140

160 

215 

141

Silica 

(Si02)

13 

17

Iron 

(Fe)

0.00 

.01

Calcium 

(Ca)

40 

45 

50 

66 

62 

58

60 

54 

58 

60 

58 

54

56 

48 

48

Magnesium 

(Mg)

8.9 

9.1 

10 

14 

13 

12

14 

12 

12 

11 

14 

14

14 

9.5 

10

Sodium 

(Na)

24 

35 

42 

64 

57 

50

52 

44

51 

50 

61 

48

49 

40 

48

Potassium 

(K)

6.8

4.4

Bicarbonate 

(SCO,)

144

182

Sulfate 

(SO.)

71

138

Chloride 

(Cl)

5.2

10

Fluoride 

(F)

0.4

.3

Nitrate 

(NO,)

1.4

.4

Boron 

(B)

0.0

.1

D

(r

Parts 

per 

million

237 

26

31

44

404 

36

38

33

38

39

36

33

35

30

33
SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER NEAR BLANCO, N. HEX. Continued 

Chemical analyses, in parts per million, water year October 1950 to September 

Date of collection

Mar. 1-10, 1951..

Aor 21~30

July 1-10 ........

Aug.26-31.Sept. 1-3

Sept. 21-30 ......

Weighted average

Mean 

discharge 

(cfs)

139 

375 

367

300 

386 

710 

1,040 

1,346 

2,913

1,956 

1,585 

897 

267 

96.6 

120

323 

47.3 

265 

682 

235 

77.9 

45.9

458

Silica 

(Si02)

19

11

--

Iron 

(Fe)

.04

.03

--

Calcium 

(Ca)

52 

56 

46

47 

40 

32 

31 

25 

24

17 

22 

34 

46 

42

46 

62 

60 

32 

40 

49 

59

34

Magnesium 

(Mg)

10 

15 

10

10 

8.3 

5.9 

5.1 

3.8 

3.2

3.2 

4.5 

6.8 

17 

11

9.5 

13 

13 

8.0 

8.6 

10 

13

6.6

Sodium 

(Na)

44 

35 

26

33 

25 

17 

16 

12 

8.0

8

0

10 

16 

29 

45 

43

34 

74 

49 

22 

36 

47 

68

20

Potassium 

(K)

2.9

4.2

Bicarbonate 

(HCO,)

143

126

SuUate 

(S0«)

107

71

Chloride 

(Cl)

3.2

4.5

Fluoride 

(F)

.2

.1

Nitrate 

(NO,)

.6

1.0

Boron 

(B)

.1

.1

Di

(res

Parts 

per 

million

346 

352 

274

299 

238 

178 

169 

136 

125

111 

116 

155 

228 

308 

321

292 

471 

383 

199 

256 

338 

430

193
SAN JUAN RIVER BASIN 115

SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER NEAR BLANCO, N. HEX. Continued

Temperature (*F) of water, water year October 1950 to September 1951 

(Once daily temperature measurement, generally at or after 5p.m.)

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

Average

Oct.

60

61

61

a 62

62

62

a 59

62

61

a 62

62

62

a 62

a 62

62

62

61

59

60

58

61

59

56

56

57

56

57

57

57

a 52

a 54

59

Nov.

48

a 54

a 48

a 47

44

47

a 48

38

a 40

a 39

37

36

a 42

a 41

a 41

a 46

a 47

45

44

45

a 45

44

a 46

44

42

a 42

a 43

a 42

40

a 40

44

Dec.

a 46

a 40

a 40

a 46

a 40

a 35

35

37

38

a 39

40

a 36

35

38

a 39

a41

a 40

39

40

a 39

a35

a 34

a35

a 35

35

_

32

32

a 32

a 32

a 35

37

Jan.

35

a 33

a 32

b31

a 35

a 31

a 33

32

a 33

a 32

a 33

a 32

a 34

a 32

32

a 33

33

32

32

33

32

32

a 33

a 33

32

32

b33

a 32

34

33

32

33

Feb.

a 32

a 30

..

--

a 32

31

33

a 34

35

40

39

36

36

36

a 38

41

41

a 41

42

42

45

42

42

a 42

43

a 42

a 43

38

Mar.

43

a 36

33

35

47

48

48

48

48

50

45

46

48

49

49

49

43

42

a 49

46

51

47

48

50

52

55

50

49

50

47

45

47

Apr.

b44

55

56

57

52

a 49

50

49

48

46

50

55

53

58

58

b51

54

58

54

52

b45

61

65

58

56

57

59

55

46

50

--

53

May

46

52

49

b48

~

_

59

62

61

62

58

58

58

53

55

57

60

65

66 .

58

58

59

60

62

65

62

59

57

57

54

58

June

54

58

58

58

59

62

64

58

64

63

65

64

64

64

67

68

68

68

69

68

68

67

67

67

70

70

72

71

73

72

65

July

74

74

74

73

73

73

78

78

78

72

72

72

71

78

71

78

78

78

77

77

78

78

78

78

78

77

78

78

78

76

Aug.

77

78

78

78

75

76

78

77

78

76

75

76

75

75

74

74

75

75

76

76

75

75

75

72

75

73

68

67

70

72

74

75

Sept.

73

b65

74

72

73

71

72

68

68

69

68

58

63

65

70

69

70

67

68

67

64

64

64

64

67

64

63

62

60

68

--

67

a Between 11 a.m. and 5p.m. 

b Before 11 a.m.
116 COLORADO RIVER BASIN

SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER NEAR BLANCO, N. HEX. Continued 

Suspended sediment, water year October 1950-to September 1951

Day

6 

11 ......

|O

22

t)A

Oft

on

31 .

Totalg

10 

14 ...

16 

18 ... 

19 ..... 

20 ----- 

21 

22 ----- 

23 ----- 

24 

25 

28 

27 ----- 

28 

29 ----- 

30 ----- 

31 

Total

October

Mean

charge

(cfs)

283 

345 

560 

421 

365

329 

309 

291 

273 

266

252 

233 

224 

206 

192

177 

172 

172 

162 

160

162 

169

179 

160 

144

136 

155 

134 

128 

126 

130

7,015

Suspended sediment

Mean 

concentration 

(ppm)

284 

250 

4,700 

1,010 

154

131 

90 

61 

66 

50

52

36 

64

Tons 

per 

day

217 

233 

7,110 

1,150 

152

116 

75 

48 

49 

36

27

15 

21

9,627

January

110 

100 

100 

110 

120

120 

120 

110 

110 

120

120 

120 

130 

120 

120

110 

110 

130 

140 

140 

130 

130 

140 

140 

140 

140 

130 

140 

160 

160 

130

3,900

88 

100 

55 

50 

45

120 

125 

110 

170 

140

135 

130 

142 

290

150 

72

25 

27 

15 

15 

15

39 

40 

33 

50 

45

44 

42 

50 

94

52 

28

1,250

November

Mean

charge

(cfs)

119 

119 

113 

103 

100

98 

100 

100 

98 

103 

98 

96 

95 

101 

151

155 

119 

98 

92 

117

144 

138 

136 

134 

128

130 

130 

138 

153 

155

3,561

Suspended sediment

Mean 

concentration 

(ppm)

64 

32

61 

22

Tons 

per 

day

21 

9

19 

8

385

February

90 

110 

120 

150 

170

180 

190 

190 

200 

200

210 

230 

260 

230 

190

190 

200 

209 

212 

215

198 

157 

130 

134 

134

130 

121 

121

4,871

\ 72

77 

55

116 

258 

126 

71 

68

57 

61 

88 

97 

189

73 

54

21

31 

25

56 

132 

65 

38 

37

32 

38 

62 

60 

97

37 

24

-- | 1,061

December

Mean

charge

(cfs)

172 

206 

177 

142 

155

138 

98 

128 

126 

172

172 

160 

162 

167 

157

167 

160 

140 

126 

136

126 

110 

106 

101 

115

113 

110 

100 

90 

90 

100

4,222

Suspended sediment

Mean 

concentration 

(ppm)

22 

41

36

-

Tons 

per 

day

8

17

15 

25

578

March

113 

98 

105 

113 

113

147 

149 

162 

174 

215

398 

440 

369 

341 

377

416 

455 

394 

301 

259

250 

283 

353 

357 

337 

377 

500 

500 

435 

337 

301

9,178

52

200

1,000 

3,000 

2,000 

1,040 

874

1,120 

1,260 

1,580 

900 

732

400 

168 

164 

350 

410 

210 

289 

191 

178 

120 

136

18

116

1,070 

3,560 

1,990 

958 

890

1,260 

1,550 

1,680 

731 

512

280 

128 

156 

337 

373 

214 

390 

258 

209 

109 

111

17,044
SAN JUAN RIVER BASIN 117

SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER NEAR BLANCO, N. HEX. Continued 

Suspended sediment, water year October 1950 to September 1951 Continued

Day

6 

10 

1*

Ifi

99

23 

9A

25

9ft

31 

Total2 

3 

6 

8 

9 

10 

11 

12 

15 

16 

17 

1 fl

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

April

Mean

charge

(cfs)

294 

227 

195 

212 

345

341 

390 

349 

341 

309

341 

276 

230 

243 

333

435 

460 

530 

505 505'

590 

608 

638 

808 

920

738 

773 

638 

680 

704

13,958

Suspended sediment

Mean 

concentration 

(ppm)

74 

67 

60 

100 

500

550 

487 

484 

478 

428

337 

210 

171 

103 

187

200 

192

611

177

Tons 

per 

day

59 

41 

32 

57 

a 466

a 506 

513 

456 

440 

357

310 

156 

106 

68 

168

235 

276

1,280 

334

12,082

July

400 

350 

317 

280 

287

269 

236 

192 

174 

162

136 

110 

101 

94 

90 

88 

86 

82 

83 

96 

134 

206 

119 

105 

112

121 

106 

117 

112 

95 

88

4,948

39

57

 35

31 

23 

38 

42

46 

119 

16 

15 

25

17 

26 

23 

26 

700 

1,550 

1,300 

680 

350 

250

136 

104 

99 

92 

100 

100

--

42 

54

27

a 20 

12 

18 

18

17 

35 

4 

4 

6

4 

6 

5 

6 

181 

561 

723 

218 

a 99 

76

44 

30 

31 

28 

a 26 

a 24

2,400

May

Mean

charge

(cfs)

674 

602 

530 

590 

745

1,160 

1,460 

1,560 

1,560 

1,510

1,510 

1,560 

1,710 

1,610 

1,330

1,240 

1,080 

1,040 

1,000 

1,380

1,920 

2,140 

1,810 

1,810 

2,030

2,850 

3,700 

4,310 

4,310 

3,780 

3,380

55,891

Suspended sediment

Mean 

concentration 

(ppm)

i -

650

1,250 

1,450 

1,650 

1,680 

1,000

1,630 

1,000 

670 

602 

380

244 

311 

162 

150 

862

1,500 

1,950 

700 

576 

800

4,340 

5,300 

3,050 

2,500 

1,050 

800

Tons 

per 

day

126

al,310

a 3, 920 

a 5, 720 

6,950 

7,080 

4,080

6,650 

4,210 

3,090 

2,620 

1,360

817 

907 

455 

405 

3,210

7,780 

11, 300 

3,420 

2,810 

4,380

33,400 

52, 900 

35, 500 

29, 100 

10, 700 

7,300

251,878

August

117 

224 

512 

470 

721

614 

426 

346 

252 

212

187 

177 

155 

108 

75

53 

45 

40 

37 

34 

32 

49 

132 

345 

767

808 

430 

353 

377 

960 

1,380

10, 437

545 

1,900 

5,610 

5,200 

11,200

9,700 

3,800 

1,000 

493 

233 

218 

136 

144 

128 

42

60

68 

48 

78 

84 

627 

1,300 

2,500 

8,800

11,300 

1,700 

346 

344 

1,790 

3,700

--

172 

1,150 

s8,380 

6,600 

s 23, 100

16, 100 

4,370 

932 

335 

133

110 

65 

60 

37 

9 

c 

el

7 

s!37 

a 463 

2,330 

s 22, 200

827,100 

1,970 

330 

350 

s 6, 280 

13,800

136,556

June

Mean

charge

(cfs)

2,850 

2,200 

2,000 

1,800 

1,700

1,600 

1,710 

1,860 

1,920 

1,920

1,810 

1,710 

1,560 

1,510 

1,510

1,510 

1,610 

1,610 

1,560 

1,460

1,460 

1,420 

1,200 

1,010 

850

780 

692 

602 

510 

450

44,384

Suspended sediment

Mean 

concentration 

(ppm)

452 

341 

156 

205 

160

155 

195 

262 

123

129 

104

87 

68 

33

Tons 

per 

day

3,480 

2,030 

842 

996 

734

670 

900 

1,320 

638

593 

438

325 

153 

46

18,815

September

794 

566 

470 

390 

300

236 

212 

184 

169 

155

121 

113 

96 

82

77

70 

62 

56 

54 

48 

41 

40 

42 

40 

50

47 

46 

39 

44 

70

4,714

1,000 

391 

250 

180 

140

40 

66 

111 

38 

35

36 

22

11

20

17 

31 

30 

40

2,140 

598 

a317 

190 

113

25 

38 

55 

17 

15

12 

5

1

3 

2 

3

4 

8

3,586

Total discharge for year (cfs-days).............................................................. 167,079

Total load for year (tons)....................................................................... 455,262

e Estimated.

s Computed by subdividing day.

a Computed from estimated concentration graph.
SAN JUAN RIVER BASIN--Continued 

SAN JUAN RIVER NEAR BLANCO, N. MEX. Continue

Particle-size analyses of suspended sediment, October 1950 to Augu

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Jan. 15, 1951. ...........

Feb. 22.................

May 8. ..................

May 28. .................

Aug. 7.. ................

Aug . 7 ..................

Aug. 25........... ......

Aug. 30.................

Time

6:50 p.m. 

4:40 p.m. 

3:30 p.m. 

9:45 a.m. 

1:30 p.m. 

10:30 p.m. 

2:30 a.m. 

7:10 p.m. 

1:00 p.m. 

10:45 a.m. 

4:25 p.m.

10:30 a.m. 

12:30 p.m. 

12:30 p.m. 

12:30 p.m. 

12:30 p.m. 

10:00 p.m. 

1:00 a.m. 

7:00 a.m. 

10:00 a.m. 

4:00 p.m.

11:45 a.m. 

8:45 a.m. 

8:45 a.m. 

8:45 a.m. 

8:45 a.m. 

5:20 p.m. 

6:25 p.m.

Water 

discharge 

(cfs)

515 

150 

144 

252 

460 

1,810 

1,760 

4,890 

3,620 

1,610 

570

710 

408 

408 

408 

408 

421 

421 

381 

353 

305

638 

892 

892 

892 

892 

337 

1,050

Suspended sedim

Concentration 

of sample 

(ppm)

5,150 

389 

63 

302 

281 

1,650 

1,570 

3,390 

1,040 

134 

40

6,050 

3,940 

3,940 

3,940 

3,940 

1,850 

2,150 

1,690 

830 

461

17,500 

15,600 

15,600 

15,600 

15,600 

557 

6,300

Concentration 

of suspension 

analyzed 

(ppm)

1,280 

2,450 

401 

944 

2,480 

1,170 

1,000 

1,630

6,020 

2,340 

2,170 

1,880 

1,910 

4,110 

3,050 

4,180 

524 

1,160

2,180 

3,120 

4,120 

4,650 

3,940 

1,430 

2,420

Percent finer 

0.002

84 

13 

26 

79 

42 

30 

26 

24

70 

13 

72 

12

75

68 

8 

77 

17

0.004

92 

16 

49 

90 

56 

38 

34 

30

84 

88 

64 

88 

41 

84 

83 

82 

86 

59

95 

77 

28 

83 

19 

86 

76

0.008

97 

21 

74 

95 

68 

40 

45 

43

95 

90 

97

97

92 

81 

92 

29

0.016

98 

30 

89 

97 

80 

62 

63 

55

94 

97 

96 

99

96 

97 

87 

98 

94

97 

96 

97 

99

97 

96

0.
SAN JUAN RIVER BASIN Continued

ANIMAS RIVER AT FARMINGTON, N. HEX.

LOCATION. At gaging station at bridge on State Highway 17, 0.6 mile southeast of Farmington, San Juan 

River.

DRAINAGE AREA. 1,360 square miles, approximately. 

RECORDS AVAILABLE.--Chemical analyses: June 1940 to September 1951.

Water temperatures: December 1950 to September 1951.

Sediment records: December 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum daily, 1,110 micromhos Aug. 20-22; minimum daily, 23

Water temperatures: Maximum observed, 88°F July 29; minimum freezing point Jan. 14, Feb. 1-2.

Sediment concentrations: Maximum daily, 7,850 ppm May 27; minimum daily, 9 ppm Sept. 28-30.

Sediment loads: Maximum daily, 59,800 tons May 27; minimum daily, 1 ton on several days. 

EXTREMES, 1940-51.--Specific conductance (1941-51): Maximum daily, 1,980 micromhos Aug. 19, 1944; mini

Water temperatures (1950-51): Maximum observed, 88°F July 29, 1951; minimum, freezing point Jan. 14, 

Sediment concentrations (1950-51): Maximum daily, 7,850 ppm May 27, 1951; minimum daily, 9 ppm Sept. 

Sediment loads (1950-51): Maximum daily, 59,800 tons May 27, 1951; minimum daily, 1 ton on several d

REMARKS. Records of specific conductance of daily samples available in district office at Albuquerque, 

of determined constituents. Records of discharge for water year October 1951 given in Water-Supply 

Chemical analyses, in parts per million, water year October 1950 to Sep

Date of collection

Oct. 1-10, 1950 ..... 

Oct. 11-20........ . .

Dec. 11-20. .........

Jan. 1-10, 1951 ..... 

Jan. 11-20......... .

Mar. 11-20 .........

Mar. 21-31 .........

Mean 

discharge 

(cfs)

341 

242 

189 

134 

189 

219

217 

213 

205 

204 

193 

201

225 

186 

181 

170 

176 

199

Temperature 

(°F)

Silica 

(Si02)

9.6 

9.4

9.2 

9.9

7.7 

11

Iron 

(Fe)

Calcium 

(Ca)

110 

126

115 

122

120 

122

Magnesium 

(Mg)

20 

21

18 

19

19 

20

Sodium 

(Na)

44 

6

5 

5

5 

53

Potassium 

(K)

2

2 

5

B

Bicarbonate 

(HCOS)

188 

226

197 

209

197 

198

Sulfate 

(S04)

247 

296

265 

279

290 

278

Chloride 

(Cl)

24 

30

26 

28

28 

28

Fluo* 

ride 

(F)

Nitrate 

(NO,)

0.8 

.2

.9 

2.1

.8 

.8

B

r

(
SAN JUAN RIVER BASIN--Continued

ANIMAS RIVER AT FARMINGTON, N. HEX. Continued

Chemical analyses, in parts per million, water year October 1950 to September 

Date of collection

Apr. 1-10, 1951..... 

Apr. 11-20.... ......

May 11-20 ..........

May 29-31, June 1-10 

June 11-20..........

July 11-201......... .

Aug. 31, Sept. 1-10..

Sept. 21-30 .........

Weighted average. . .

Mean 

discharge 

(cfs)

155 

109 

181 

352 

683 

1,616 

2,201

1,894 

1,523 

638 

285 

151 

387 

635 

110

272 

39.8 

85.0

407

Temperature 

(°F)

Silica 

(Si02)

8.8 

9.5

7.6 

8.6 

11

13

..

Iron 

(Fe)

Calcium 

(Ca)

111 

69

38 

88 

130

138

..

Magnesium 

(Mg)

17 

10

61 

14 

24

24

-.

Sodium 

(Na)

46 

2

1 

4 

5

5

..

Potassium 

(K)

2

)

! 

I

L

..

Bicarbonate 

(HCO,)

170 

132

80 

166 

206

244

..

Sulfate 

(SO,)

266 

129

62 

193 

318

304

..

Chloride 

(Cl)

20 

12

7.5 

21 

23

25

..

Fluo^ 

ride 

(F)

Nitrate 

(N03 )

0.6 

1.9

1.3 

1. 1 

1.1

2.1

..

Boron 

(B)
SAN JUAN RIVER BASIN 121

SAN JUAN RIVER BASIN Continued 

ANIMAS RIVER AT FARMINGTON, N. HEX. Continued

Temperature (°F) of water, December 1950 to September 1951 

/Once-daily temperature measurement generally between 4 p.m. and 6 p.in./

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

Average

Oct. Nov. Dec.

._

_

_

..

_

.-

43

43

a35

40

41

40

40

40

38

37

a 34

37

36

35

37

37

Jan.

35

35

35

39

36

37

34

35

35

34

37

35

36

32

33

35

34

35

39

38

38

39

39

a35

41

41

42

42

40

37

33

37

Feb.

32

32

33

33

36

40

42

43

45

46

49

43

42

43

43

45

42

44

44

44

46

47

45

46

44

41

40

42

__

-.

--

42

Mar.

40

38

38

37

45

48

48

51

48

50

47

45

49

51

51

49

46

46

46

50

53

49

49

51

55

55

48

50

50

49

47

48

Apr.

50

55

56

52

54

..

55

53

53

49

51

53

56

58

59

59

56

59

57

56

61

62

60

59

59

60

60

59

55

55

--

56

Hay

49

^_

..

64

64

63

64

57

54

59

52

52

55

58

63

64

62

68

69

69

64

65

63

65

57

65

June

a 64

a 65

a 66

67

67

65

65

68

69

69

65

a 68

..

_

..

_

.

_

_

__

..

--

74

._

--

--

July

_

--

_

.-

--

_

--

..

74

74

80

80

82

78

82

80

80

80

80

80

82

82

85

82

88

85

82

"

Aug.

82

82

75

75

80

84

80

75

74

76

87

80

80

80

80

81

80

78

70

80

75

78

80

72

78

80

68

66

72

74

74

77

Sept.

72

74

78

72

70

71

72

72

74

72

74

72

66

68

66

64

64

68

65

62

68

66

68

66

65

68

65

69

68

-69

a During forenoon.
122 COLORADO RIVER BASIN

SAN JUAN RIVER BASIN Continued 

ANIMAS RIVER AT FARMINGTON, N. HEX.--Continued 

Suspended sediment, December 1950 to September 1951

Day

Q

20

22

o«

90

 y\

Totalg

12

15 

17 

18 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

October

Mean

charge

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

January

220 

220 

204 

192 

200

196 

200 

196 

192 

216 

196 

200 

212 

196 

216 

177 

150 

185 

196 

204

188 

188 

188 

188 

192

208 

204 

204 

208 

216 

228

6,180

74 

80 

124 

63 

62

51 

86 

125 

102 

235 

83 

76 

150 

149 

164

131 

382 

235 

94 

71

62

108 

58 

86 

101

98

),.,

--

44 

48 

68 

33 

33

27 

46 

66 

53 

138 

44 

41 

86 

79 

96

63 

155 

117 

50 

39

31 

55 

29 

44 

52

55 

82

2,002

November

Mean

charge

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

February

210 

180 

166 

236 

252

260 

248 

248 

236 

212 

208 

220 

200 

188 

173

163 

156 

177 

188 

192

200 

166 

163 

173 

188

188 

196 

177

5,564

"

129

61 

61 

49 

72

37

--

81

76

27 

26 

23

37

18

1,440

December

Mean

discharge

(cfs)

220

220 

224 

216 

208 

208

212 

200 

204 

204 

204

200 

200 

196 

210 

210 

216

3,552

Suspended sediment

Mean 

concentration 

(ppm)

144

75 

67 

56 

54 

50

56 

58

77 

90 

74

78 

74 

80 

107 

101 

76

--

Tons 

per 

day

86

45 

41 

33 

30 

28

32 

31 

42 

50 

41

42 

40 

42 

61 

57 

44

745

March

170 

153 

140 

149 

173

180 

188 

184 

180 

184 

180 

188 

192 

177 

180

184 

177 

170 

160 

153

160 

173 

184 

192 

196

200 

220 

232 

228 

216 

184

5,647

32

99

415 

153 

153 

198 

157 

153 

162 

121

110 

156 

189 

149 

158 

144

~

15

49

190 

66 

63

86 

73 

76 

84 

64

59 

93 

118 

92 

92 

72

1,755
SAN JUAN RIVER BASIN 123

SAN JUAN RIVER BASIN Continued 

ANIMAS RIVER AT FARMINGTON, N. HEX.--Continued 

Suspended sediment, December 1950 to September 1951 Continued

Day

1 A

1Q

20

24

25

no

on

31 

Total2

3

16 

17 

18

19 

20 

21 

22 - 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

April

Mean

charge

(cfs)

184 

180 

165 

146 

140

149 

146 

156 

143 

140

118 

115 

93

77 

77

85 

87 

115 

149 

170

160 

153 

146 

163 

240

228 

208 

177 

134 

200

4,444

Suspended sediment

Mean 

concentration 

(ppm)

94 

103 

82 

92 

87

120 

133 

97 

84 

103

104 

218 

95

94 

162

Tons 

per 

day

47 

50 

37 

36 

33

a 48 

52 

41 

32 

39

33 

68 

24

29 

80

1,492

July

964 

820 

740 

692 

639

576 

478 

490 

520 

460

406 

355 

296 

305 

280

272 

264 

252 

212 

204

180 

180 

188 

188 

204 

146 

137 

112 

109 

112 

104

10,885

60 

500 

260

88 

102 

60 

94 

70

70 

92 

144 

168 

84 

180 

690 

230 

138 

63 

31

e!40 

e!20 

elOO 

e93 

e86

e70 

e51 

ellO 

e!40 

e99 

e77 

e62 

48 

412 

197

65 

73 

41 

54 

39

34

45 

73 

85 

46

71 

255 

70 

41 

19 

9

2,825

May

Mean

charge

(cfs)

216 

208 

163 

104 

109

212 

508 

653 

684 

660

716 

829 

928 

892 

732

604 

508 

478 

508 

639

1,010 

1,130 

937 

838 

856

1,540 

2,820 

3,800 

4,010 

3,490 

3,190

33,972

Suspended sediment

Mean 

concentration 

(ppm)

73

2,600 

1,420 

1,590 

1,100

1,120 

1,400 

1,940 

1,110 

682

460 

280 

237 

274 

963

1,680 

1,100 

630 

599 

1,200

6,870 

7,850 

3,670 

2,800 

1,620 

1,440

Tons 

per 

day

43 

e39 

e22 

ell 

e59

e570 

3,570 

2,500 

2,940 

1,960

2,170 

3,130 

4,860 

2,670 

1,350

750 

384 

306 

376 

1,660

4,580 

3,360 

1,590 

1,360 

a 2, 770

s 31, 700 

59, 800 

37, 700 

30, 300 

15, 300 

12, 400

230 230

August

112 

153 

281 

555 

660

700 

534 

390 

284 

200 

143 

112 

93 

73 

75

42 

29 

27 

19 

22

22 

36 

46 

77 

127 

121 

127 

115 

166 

260 

707

6,308

100 

830 

1,900 

2,480 

1,410

780 

300 

194 

120 

68

20 

23 

24 

63 

20

20 

79 

50 

38 

14

89 

20 

13 

100 

180

120 

67 

52 

74 

650 

1,910

30 

343 

s 1, 870 

3,720 

2,510

1,470 

433 

204 

92 

37 

8 

7 

6 

12 

4

2 

6 

4 

2 

1

5 

2 

2 

a. 21 

a 62

a 39 

23 

16 

33 

456 

s3,560

14,980

June

Mean

charge

(cfs)

2,640 

1,980 

1,530 

1,310 

1,330

1,350 

1,620 

1,920 

2,090 

2,150

1,940 

1,640 

1,700 

1,660 

1,490

1,590 

2,150 

2,310 

2 230 

2J 230

2,100 

2,080 

,810 

,610 

,450

,350 

,330 

,250 

1,180 

1,070

52, 090

Suspended sediment

Mean 

concentration 

(ppm)

1,500 

1,240 

673 

560 

800

1,000 

1,120 

1,340 

1,060 

700

450 

600 

670 

460 

400

520 

500 

460 

488 

560

540 

276 

260 

220 

180

120 

100 

66

Tons 

per 

day

10, 700 

6,630 

2,780 

al,980 

2,870

3,640 

4,900 

6,950 

5,980 

a 4, 060

a 2, 360 

2,660 

3,080 

a 2, 060 

a 1,610

a 2, 230 

2,900 

2,870 

2,940 

a 3, 370

3,060 

1,550 

1,270 

a 956 

a 705

a 437 

a 359 

223 

e!90 

6170

85, 490

September

562 

390 

330 

260 

196

143 

130 

101 

95 

82 

73 

68 

42 

35 

32

30 

32 

30 

29 

27

28 

35

82 

109 

107

98 

87 

85 

98 

121

3,537

287 

70 

60 

51 

50

21 

33

24

1"

13 

9

--

435 

74 

a 53 

36 

26

7 

7

2

1

3

2

709

Total discharge for period (cfs-days) Dec. 15-Sept. 30 . 

Total load for period (tons) Dec. 15-Sept. 30 ..........

, 132,179

. 341,668

e Estimated.

s Computed by subdividing day.

a Computed from estimated concentration graph.
SAN JUAN RIVER BASIN Continued 

ANIMAS RIVER AT FARMINGTON, N. HEX. Continue

Particle-size analyses of suspended sediment, May to Augus

(Methods of analysis: B, bottom withdrawal tube; O, decantation; P, pipette; 

W, in distilled water; C, chemically dispersed; M, mechanicall

Date of collection

May 29, 1951 ...........

May 31 .................

Aug. 4 .................

Aug. 7 .................

Aug. 31 ................

Time

7:45 p.m. 

11:20 a.m. 

5:30 p. m. 

2:00 p. m. 

5:30 p.m. 

5:25 p.m. 

3:25 p.m. 

10:45 a.m.

Water 

discharge 

(cfs)

4,230 

3,100 

1,724 

1,070 

604 

646 

514 

804

Suspended sed

Concentration 

of sample 

(ppm)

1,670 

1,390 

531 

66 

1,650 

548 

417 

1,470

Concentration 

of suspension 

analyzed 

(ppm)

1,790 

908 

754 

2,290

Percent fine

0.002

21

43

0.004

57 

44 

49 

64

0.008

48 

52

0.016

84 

67 

67 

84

0
SAN JUAN RIVER BASIN 125

SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER AT SHIP ROCK, N. MEX.

LOCATION. At gaging station on left bank 3 miles northwest of Ship Rock, San Juan County,

and-about 6 miles downstream from Chaco River. 

DRAINAGE AREA. 12,900 square miles, approximately. 

RECORDS AVAILABLE. Water temperatures: December 1950. to September 1951.

Sediment records: December 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum observed, 82°F July 2, 22; minimum, freezing point on several days. 

Sediment concentrations: Maximum daily, 64,800 ppm Aug. 25; minimum daily, 8 ppm July

13. 

Sediment loads: Maximum daily, 578,000 tons Aug. 25; minimum daily, 5 tons, Aug. 21,

Sept. 12-24.

REMARKS. Flow affected by ice Feb. 1-7. Records of discharge for water year October 1950 

to September 1951 given in Water-Supply Paper 1213, and revision of discharge for Aug. 

31 given in WSP 1243.

Temperature (°F) of water, December 1950 to September 1951 

/Once-daily temperatures, generally observed between 1 p. m. and 7 p. m._7

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

Average

Oct. Nov. Dec.

..

,_

--

__

--

__

--

_

--

42

42

41

40

40

39

31

37

32

32

33

34

34

36

34

37

Jan.

35

32

35

35

33

32

32

31

32

33

32

31

31

31

32

33

35

31

34

38

40

40

41

41

36

33

36

--

34

Feb.

..

_

_.

--

33

35

38

41

43

41

40

41

39

44

45

42

42

36

40

40

40

46

49

a41

..

.-

--

--

Mar.

41

40

40

48

51

52

51

52

a 43

43

50

52

49

50

a 32

58

50

53

48

50

a43

51

50

48

49

43

41

47

Apr.

a 47

48

60

53

55

55

58

58

58

--

55

50

54

60

a 58

64

55

61

66

60

65

a 53

65

65

60

58

59

58

May

50

59

64

54

a 55

a 50

62

56

63

65

55

a 50

67

55

55

60

61

45

69

a 59

52

60

50

65

65

66

60

60

70

a 59

75

59

June

59

59

64

70

65

68

75

50

69

63

65

69

74

70

74

73

65

76

78

74

76

75

78

_

75

75

a75

78

70

July

80

82

78

80

76

80

80

a 68

73

76

75

80

76

80

a 67

a 74

a 79

a75

a 74

a 78

a 78

82

81

a 71

a71

a73

a 73

a 75

a 76

76

Aug.

a71

a75

70

70

74

65

76

75

77

75

a 64

a65

a 65

a 66

64

a65

a 74

a 70

--

a 72

a 66

a 66

75

a 67

73

77

--

70

Sept.

a 68

76

76

_

75

a 70

a 70

75

72

65

68

--

__

--

68

_

--

~

_

65

--

a 58

--

a Reading obtained prior to 12 m.
126 COLORADO RIVER BASIN 

SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER AT SHIP ROCK, N. HEX.--Continued 

Suspended sediment, December 1950 to September 1951

Day

12

on

21

22

23

25

27

90

30 

Total2

g

18

20 

21 ------ 

22 

23 

24 

25 

26 ------ 

27 

28 

29 

30 ------ 

31 

Total

October

Mean

charge

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

January

440 

435 

457 

430 

435

430 

372 

336 

336

344

415 

457 

468 

446 

340

367 

376 

410 

479 

496 

474 

462 

474 

484 

508 

496 

484 

452 

462 

514 

479

13, 558

163 

200 

150 

175 

230

200 

170 

145 

190 

255

250 

325 

300 

263 

150

175 

230 

360 

475 

375 

306 

275 

250 

240 

425

325 

250 

200 

250 

310 

350

--

194 

a235 

185 

203 

270

232 

171 

132 

172 

237

280 

401 

a 379 

317 

138

173 

233 

399 

614 

502 

392 

343 

320 

314 

583 

435 

327 

244 

312 

a 430 

a 453

9,620

November

Mean

charge 

(cfs)

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per 

day

February

400 

300 

350 

400 

450

500 

600 

622 

622 

570

544 

563 

608 

602 

538

526 

490 

502 

508 

508 

520 

484 

430 

415 

395

425 

410 

400

13, 682

350 

290 

300 

370 

520

700 

800 

850 

861 

720

425 

325 

750 

650 

250

200 

200 

180 

150 

120 

125 

131 

134 

134 

125

140 

130 

120

-

a 378 

a235 

a 284 

a 400 

632

945 

1,300 

1,430 

1,450 

1,110

624 

494 

1,230 

1,060 

363

284 

265 

244 

206 

165 

176 

171 

156 

150 

133 

a 161 

a 144 

a 130

14, 320

December

Mean

charge

(cfs)

520 

520 

532 

496 

457

474 

452 

446 

435 

430

446 

420 

415 

380 

430 

395

7,248

Suspended sediment

Mean 

concentration 

(ppm)

146

250 

175 

175 

175 

150 

125

--

Tons 

per 

day

188

301 

198 

196 

180 

174 

133

3,062

March

405 

395 

380 

362 

385

380 

380 

430 

420 

440

484 

664 

752 

664 

596

643 

664 

692 

657 

538 

468 

474 

502 

576 

643 

622 

664 

808 

865 

752 

615

17,320

110 

100 

100 

100 

110

115 

90 

100 

90 

125

185 

425 

850 

1,820 

1,280

900 

925 

1,020 

1,100 

875 

765 

625 

450 

400 

400

350 

400 

600 

650 

451 

325

--

120 

107 

103 

a 98 

114

118 

92 

116 

102 

148 

242 

762 

1,730 

3,260 

2,060 

1, 560 

1,660 

1,910 

1,950 

1,270 

967 

800 

610 

622 

694

588 

a717 

1,310 

1, 520 

916 

540

26, 806

a Computed from estimated concentration graph.
SAN, JUAN RIVER BASIN

SAN JUAN felVER BASIN Continued

SAN JUAN RIVER ATJ SHIP ROCK, N. HEX. Continued

Suspended sediment, December 1950 to September 1951 Continued

127

Day

1 ft

90

22

23

24

Oft

29

30

31 

Total2

g

g

13

14 

15 

16 

17 

18 ----- 

19 ----- 

20 « 

21 ~ 

22 

23 

24 

25 -----

26 ----- 

27 ----- 

28 ----- 

29 -----

30 « 

31 

Total

April

Mean

charge

(cfs)

550 

556 

532 

484 

462

576 

643 

615 

576 

538

514 

508 

457 

362 

354

376 

474 

526 

615 

671

643 

700 

715 

657 

840

1,080 

832 

824 

671 

715

18, 066

Suspended sediment

Mean 

concentration 

(ppm)

230 

210 

200 

180 

180

275 

400 

350 

275 

300

450 

550 

375 

175 

125

125 

200 

250 

375 

475

375 

370 

456 

500 

1,000

1,580 

1,200 

775 

400 

350

Tons 

per 

day

342 

315 

287 

235 

225

428 

694 

581 

428 

a 936

625 

754 

463 

171 

119

127 

256 

355 

623 

861

651 

699 

880 

887 

2,270

4,610 

a 2, 700 

1,720 

a 725 

a 676

24, 143

July

1,380 

1,200 

997 

916 

824

792 

664 

636 

715 

615

526 

496 

435 

331 

367

304 

248 

196 

187 

160 

132 

168 

208 

196 

165

173 

150 

154 

137 

116 

93

13,681

300 

275 

350 

150 

150

125 

67 

35 

74 

42

27 

16 

8 

19 

35

80 

51 

30 

54 

23 

15 

23 

18 

20 

24

29 

25 

21 

6,000 

23, 000 

4,000

--

1,120 

891 

942 

371 

334

267 

120 

60 

143 

70

38 

21 

9 

17 

35

66 

34 

16 

27 

10 

5 

10 

10 

all 

11

14 

a 10 

9 

a 2, 220 

7,200 

1,000

15,091

Total discharge for period (cfs-days) Dec. 

Total load for period (tons). .............

May

Mean

charge 

(cfs)

824 

832 

722 

629 

544

657 

1,570 

2,090 

2,400 

2,110

2,030 

1,990 

2,320 

2,400 

2,140

1,790 

1,620 

1,400 

1,380 

1,430

2,050 

3,070 

2,320 

2,680 

2,980

3,630 

6,120 

7,900 

8,500 

7,700 

6,700

84, 528

Suspended sediment

Mean 

concentration 

(ppm)

500 

475 

325 

220 

110

780 

5,550 

4,800 

4,050 

3,420

2,750 

2,200 

3,080 

2,900 

2,450

1,320 

1,350 

800 

700 

950

2,200 

4,320 

3,350 

1,850 

1,850 

3,550 

6,200 

7,400 

4,500 

3,600 

2,600

--

Tons 

per 

day

1,110 

1,070 

634 

374 

162

1,380 

s 24, 500 

27, 100 

26, 200 

19, 500

15, 100 

11, 800 

19, 300 

18, 800 

14, 200

6,380 

5,900 

3,020 

2,610 

3,670

12, 200 

35, 800 

21,000 

13,400 

14, 900

34, 800 

102,000 

158,000 

103,000 

74, 800 

47,000

819,710

August

91 

89 

297 

1,520 

2,280

1,700 

1,200 

840 

685 

508

354 

271 

227 

190 

120

80 

74 

66 

57 

60 

43 

31 

35 

121 

2,760

2,190 

980 

560 

475 

533 

b2,090

020,527

350 

241 

23, 900 

41, 600 

42,800

35,600 

9,500 

4,750 

2,750 

1,100

750 

293 

207 

139 

100

78 

64 

54 

50 

40 

42 

156 

2,200 

15,000 

64,800

61,500 

18,500 

11,000 

6,000 

3,500 

15,800

--

18, 1950-Sept. 30, 195

86 

58 

s 20, 400 

s 190, 000 

s 284, 000

s 173, 000 

30, 800 

10, 800 

5,090 

1,510

717 

214 

127 

71 

32

17 

a 13 

10 

8 

a6 

5 

13 

s531 

a 4, 900 

s 578, 000

s 407, 000 

49, 000 

a 16, 600 

a 7, 700 

5,040 

as 114, 000

1, 899, 748

June

Mean

charge

(cfs)

6,120 

4,810 

3,730 

3,010 

3,320

3,040 

3,190 

3,790 

4,310 

4,140

4,280 

3,960 

3,730 

3,570 

3,100

2,790 

3,790 

4,070 

3,630 

3,930

3,760 

3,700 

3,630 

2,870 

2,320

1,800 

1,820 

1,740 

1,640 

1,490

101,080

Suspended sediment

tsan 

concentration 

(PPm)

2,300 

1,980 

1,650 

1,300 

1,050

1,050 

1,050 

1,150 

1,550 

1,300

1,150 

t 1, 040

950 

1,150 

1,500 

1,200 

1,070

1,180 

900 

875 

700 

500 

200 

250 

300 

300 

350

Tons 

per 

day

38, 000 

25, 700 

16. 600 

10, 600 

9,410

8,620 

9,040 

11, 800 

18, 000 

14,500

13, 300 

10, 100

7,160 

11, 800 

16,500 

11, 800 

11, 400

12,000 

8,990 

8,580 

5,420 

3,130

a 972 

1,230 

1,410 

1,330 

1,410

319, 102

September

2,490 

1,620 

1,130 

806 

576 

435 

358 

331 

308 

271

238 

190 

132 

130 

121

119 

116 

93 

85 

80

74 

76 

78 

87 

114

119 

123 

121 

240 

607

11,268

15,400 

6,000 

1,900 

1,000 

250

200 

147 

55 

47 

20 

15 

10 

13

20

20 

I 30

68 

4,800 

18, 800

--

a 104, 000 

a 26, 200 

5,800 

2,180 

389

a235 

142 

49 

39 

15

a 10 

5

 5

5

a5 

alO

22

as 10, 600 

s 40, 500

190,276

300, 958 

. 3,321,878

s Computed by subdividing day.

a Computed from estimated concentration graph.

b Revised.
SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER AT SHIP ROCK, N. HEX. Continue

Particle-size analyses of suspended sediment, January to Septem

(Methods of analysis: B, bottom withdrawal tube; D, decollation; P, pipette; 

W, in distilled water; C, chemically dispersed; M, mechanicall

Date of collection

Feb. 22. ................

May 29 .................

Aug. 25. ................

Aug. 27. ................

Sept. 10 ................

Time

2:05 p.m. 

7:30 a. m. 

12:00 m. 

12:30 p. m. 

7:05 a.m. 

10:20 a. m. 

2:15 p.m. 

6:15 p.m. 

2:00 p.m.

7:00 p. m. 

7:00 p. m. 

7:00 p. m. 

6:58 a.m. 

12:40 p.m. 

3:20 p. m. 

3:20 p. m. 

3:20 p. m. 

5:30 p. m.

Water 

discharge 

(cfs)

420 

496 

556 

2,030 

9,100 

6,310 

3,960 

1,370 

5,280

1,030 

1,030 

1,030 

2,380 

4,620 

818 

818 

818 

255

Suspended sed

Concentration 

of sample 

(ppm)

234 

121 

935 

1,660 

5,880 

2,070 

955 

168 

36, 700

8,720 

8,720 

8,720 

89, 600 

41, 800 

16, 400 

16,400 

16, 400 

63

Concentration 

of suspension 

analyzed 

(ppm)

2,660 

2,350 

1,920

5,280

4,290 

4,430 

4,230 

5,310 

2,190 

3,450 

3,260 

4,540

Percent finer 

0.002

68 

22 

13

68 

3 

64

66 

9 

68

0.004

73 

29 

18

75

82 

12 

79 

70 

53 

71 

13 

75

0.008

81 

36 

23

92 

86 

90

88 

45 

87

0.016

83 

45 

34

98

96 

95 

96 

89 

75 

95 

93 

93

0
SAN JUAN RIVER BASIN--Continued 

SAN JUAN RIVER NEAR BLUFF, UTAH

LOCATION.--At bridge on State Highway 47, 1,800 feet downstream from gaging station and 20 miles southwe

DRAINAGE AREA. 23,000 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: February to June 1927, October 1929 to September 1951-

Water temperatures: May 1944 to September 1951.

Sediment records: August to September 1928. July 1929 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum 1,190 ppm July 21, 23-26, 28; minimum 241 ppm June 11-14, 

Hardness: Maximum, 610 ppm July 21, 23-26, 28; minimum, 148 ppm June 11-14, 19-20.

Specific conductance: Maximum daily, 1,870 micromhos Feb. 9, July 24; minimum daily, 352 micromhos Ju

Water temperatures: Maximum observed, 82°F July 20; minimum, freezing point Feb. 2. 

EXTREMES, 1929-51.--Dissolved solids: Maximum, 1,860 ppm July 21-31, 1934; minimum, 167 ppm June 11-20, 

Hardness: Maximum, 874 ppm July 21-31, 1934; minimum, 109 ppm July 1-10, 1935.

Specific conductance (1941-51): Maximum daily, 2,070 micromhos Aug. 26, 1943; minimum daily, 228 micr

Water temperatures (1941-51): Maximum observed, 85°F July 21, 1945; minimum, freezing point on many d

Sediment concentrations: Maximum daily, 309,000 ppm September 21, 1929; minimum daily, 0 ppm July 3-1

Sediment loads: Maximum daily, 12,000,000 tons Oct. 14,1941 (rev.); minimum daily, 0 tons July 3-13, 1

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conducta

Chemical analyses, in parts per million, water year October 1950 to Sept

Date of collection

Oct. 1-10, 1950 . . 

Oct. 11-20... ....

Nov. 1-10.. ......

Jan. 1-10, 1951 ..

Jan. 22, 24, 26, 

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

Feb. 1-9 ........

Feb. 10-13, 17, 

19 .............

Mar. 1-3, 7-9 ...

Mar. 21-31 ......

Mean 

discharge 

(da)

702 

453 

324 

309 

412 

526

524 

566 

497 

464 

448

544 

460

608 

511 

434 

573 

624

Silica 

(Si02)

15 

13 

8.9 

9.0 

13 

11

12 

11 

13 

13 

14

14

15

14 

12 

12 

13 

15

Iron 

(Fe)

0.01 

.02 

.03 

.02 

.03 

.03

.06 

.05 

.04 

.05 

.05

.10 

.04

.04 

.04 

.04 

.05 

.03

Calcium 

(Ca)

104 

104 

120 

132 

145 

126

128 

126 

124 

126 

128

126 

147

130 

128 

128 

114 

101

Magnesium 

(Mg)

27 

29 

41 

46 

49 

42

45 

41 

42 

40 

39

40 

43

41 

42 

41 

35 

28

Sodium 

(Na)

Potassium 

(K)

78 

97 

129 

141 

144 

120

113 

111 

108 

113 

114

110 

135

113 

121 

126 

102 

87

Bicarbonate 

(HCO,)

194 

182 

177 

192 

208 

198

198 

182 

187 

198 

202

194 

207

186 

185 

190 

182 

183

Sulfate 

(S04 )

331 

382 

528 

583 

620 

513

514 

500 

493 

490 

490

490 

558

501 

531 

534 

440

354

Chloride 

(Cl)

24 

28 

37 

40 

40 

34

35 

35 

33 

34 

34

32

59

43 

34 

34 

29 

25

Fluoride 

(F)

0.4 

.4 

.3 

.4 

.4 

.4

.4 

.4 

.4

.4' 

.4

.4 

.3

.4 

.3 

.3 

.4 

.4

Nitrate 

(NO,)

2.9 

1.8 

2.4 

3.4 

5.0 

3.6

4.2 

4.2 

4.3 

4.3 

4.3

4.9 

4.8

4.7 

3.3 

3.2 

2.7 

2.0

Boron 

(B)

D

(r

Part

per 

million

706 

768 

1,010 

1,110 

1,170 

985

995 

967 

953 

970 

965

960 

1,110

973 

1,010 

1,020 

863 

715
SAN JOAN RIVER BASIN Continued 

SAN JOAN RIVER NEAR BLOFF, UTAH Continued

Chemical analyses, in parts per million, water year October 1950 to September 

Date of collection

Apr. 2-7, 1951 .... 

Apr. 11-20........

Apr. 21-30.... ....

May 1-10 .........

May 11-20..... ....

May 21-31..... ....

June 11-14, 19-20.. 

June 21, 23, 25, 27- 

29 ..............

July 5-7, 9-10..... 

July 11-20 ........

July 21, 23-26, 28 .

Aug. 6-7, 9, 11, 

15-16...........

Weighted average .

Mean 

discharge 

(cfs)

536 

442 

719 

918 

1,924 

3,901

3,507 

3,507

2,492 

691 

401

241

787 

a 1,320

b888

Silica 

(SiO,)

15 

14 

16 

16 

16 

20

15 

12

12 

14 

10 

13

15

15

Iron 

(Fe)

.10 

.04 

.05 

.03 

.04 

.19

.20 

.03

.02 

.02 

.02 

.07

.04

0.08

Calcium 

(Ca)

94 

94 

82 

81 

64 

65

52 

45

49 

74 

89 

185

111

85

Magnesium 

(Mg)

26 

24 

19 

19 

13 

12

9.4 

8.5

10 

14 

22 

36 

27

22

Sodium **»- 

(Na) S£m

83 

89 

74 

65 

35 

27

23

22

27 

55 

88 

137

117 3.0

65

Bicarbonate 

(HCO,)

172 

173 

172 

148 

140 

170

130 

112

108 

148 

142 

180

180

161

Sulfate 

(S04 )

331 

335 

261 

262 

152 

111

95 

88

115 

204 

330 

672

433

271

Chloride 

(Cl)

24 

24 

19 

18 

10 

9.0

7.0 

7.0

9.0 

17 

29 

38

33

20

Fluoride 

(F)

.3 

.3 

.4 

.4 

.3 

.4

.3

.4

.3

.5 

.5 

.6

.5

0.4

Nitrate 

(NO,)

2.1 

.9 

2.2 

1.4 

2.8 

1.7

1.3 

1.8

1.2 

1.1 

.7 

5.4

.8

2.4

Boron 

(B)

Part

per 

mil

lion

67

67

56

54

36

33

27

24

28

46

65

1,19

83

57

a Not included for computation of weighted averages.

b Represents 71 percent of th^ runoff for the water year October 1950 to September 1951.
JUAN RIVER BASIN 131

SAN JUAN RI^ER BASIN Continued 

SAN JUAN RIVER JdEAR BLUFF, UTAH Continued 

Temperature (°F) o[f water, October 1950 to August 1951

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

Average

Oct.

65

52

55

57

58

59

61

62

61

62

64

60

65

65

68

61

65

60

66

58

65

64

64

65

55

57

56

59

62

59

58

61

Nov.

54

49

58

48

55

54

53

48

39

47

38

38

44

40

44

36

37

38

48

48

49

47

45

44

39

40

45

42

38

37

--

45

Dec.

45

43

46

45

47

35

40

40

41

45

47

45

47

47

48

43

..

43

45

41

39

34

37

40

--

34

34

33

36

35

--

41

Jan.

38

39

37

39

43

39

37

42

33

33

39

36

__

35

35

34

37

39

37

'

41

41

41

42

_

..

44

42

33

38

Feb.

 i 

!3

12

S3

!4

10

)8

10

13

14

14

46

46

46

..

--

_

44

--

43

45

45

46

47

51

51

48

44

46

_.

--

43

Mar.

44

40

41

--

__

51

53

54

54

53

53

54

50

50

54

45

46

53

54

51

51

._

--

58

_

50

49

53

46

--

Apr.

._

50

54

57

55

55

54

_

--

51

51

53

61

"

64

63

60

56

65

63

_.

61

63

57

60

62

58

_.

--

--

May

..

60

61

61

61

__

63

63

61

66

65

62

--

56

58

63

56

58

59

60

59

57

59

60

68

67

68

70

70

60

62

June

58

--

--

--

--

__

--

--

64

70

65

66

66

66

._

70

71

74

75

75

-.

69

..

72

71

74

--

--

--

July

..

--

--

--

76

76

74

75

76

75

74

75

--

79

79

--

79

82

79

--

78

79

80

80

78

--

--

--

--

Aug.

--

--

74

"

67

67

--

--

68

--

--

--

67

68

--

--

78

78

80

--

._

--

--

74

Sept.
132 COLORADO RIVER BASIN

SAN JUAN RIVER BASIN Continued 

SAN JUAN RIVER NEAR BLUFF, UTAH--Continued 

Suspended sediment, water year October 1950 to September 1951

Day

3

19

13 --

in

21

22

25

no

90

31 

Total0

12

18

20 ------ 

21 

22 

23 

24 ------ 

25 

26 - 

27 ------ 

28 

29 

30 

31 

TotalOctober

Mean

charge

(cfs)

756 

738 

617 

595 

720

858 

774 

708 

628 

628

542 

536 

500 

480 

476

451 

432 

400 

382 

335

331 

344 

331 

340 

352

348 

335 

311 

292 

273 

303

15,116

552 

531 

437 

471 

471

466 

446 

446 

395 

428

348 

373 

480 

536 

536

442 

418 

391 

446 

510 

526 

542 

521 

552 

536 

531 

516 

495 

521 

531 

590

14,984

Suspended sediment

Mean 

concentration 

(ppm)

2,500 

3,050 

2,100 

1,850 

2,020

2,500 

1,950 

1,680 

1,750 

1,100 

1,320 

720 

990 

1,330 

600 

318 

243 

800 

600 

508

554 

900 

550 

484 

731 

641 

564 

438 

371 

306 

221

--

January

238 

290 

112 

302 

264

301 

350 

458 

231 

92

86 

121 

300 

350 

354

292 

411 

187 

205 

253

350 

432 

540 

395 

280 

189 

200 

300 

494 

346 

390

--

Tons 

per 

day

5,100 

6,080 

3,500 

2,970 

3,930

5,790 

4,080 

3,210 

2,970 

1,870

1,900 

1,040 

1,340 

1,720 

771

387 

283 

864 

619 

459 

495 

836 

492 

444 

695 

602 

510 

368 

292 

226 

181

54, 024

355 

416 

132 

384 

336

379 

a 421 

552 

246 

106

81 

122 

a 389 

a 507 

512

348 

464 

197 

247 

348

a 497 

632 

760 

589 

a 405 

271 

a 279 

a 401 

695 

496 

621

12, 188

November

Mean

charge

(cfs)

276 

273 

284 

307 

311

335 

335 

340 

315 

315

323 

352 

364 

382 

378 

391 

409 

485 

526 

510 

495 

485 

574 

640 

542

531 

521 

505 

490 

476

12,470

Suspended sediment

Mean 

concentration 

(ppm)

390 

534 

625 

576 

259

457 

466 

465 

357 

159

119 

200 

649 

259 

793 

789 

726 

892 

593 

973

1,000 

929 

475 

1,350 

676

330 

248 

430 

1,080 

1,140

-

Tons 

per 

day

291 

394 

479 

477 

217

413 

421 

427 

304 

135 

104 

190 

638 

267 

809

833 

802 

1,170 

842 

1,340

1,340 

1,220 

736 

2,330 

989

473 

349 

586 

1,430 

1,470

21,476

February

601 

284 

183 

166 

266

461 

651 

816 

708 

662

656 

623 

606 

612 

623

601 

547 

552 

552 

563

542 

531 

536 

516 

485 

476 

471 

480

14,770

266 

104 

352 

78 

300

900 

1,100 

1,350 

770 

1,200

1,100 

1,300 

980 

1,000 

1,100

700 

500 

450 

400 

350

300 

250 

230 

203 

157 

191 

158 

172

--

432 

80 

174 

35 

215

1,120 

1,930 

2,970 

1,470 

2,140

1,950 

2,190 

1,600 

a 1,650 

a 1,850

a 1,140 

a738 

a 671 

a 596 

a 532

a439 

a 358 

a 333 

283 

206 

245 

201 

223

25,771

December

Mean

charge

(cfs)

471 

510 

542 

526 

557

557 

531 

516 

516 

516

510 

505 

568 

584 

579

579 

584 

590 

579 

579 

568 

552 

542 

485 

476 

451 

446 

428 

418 

563 

536

16,364

Suspended sediment

Mean 

concentration 

(ppm)

439 

557 

680 

957 

331

1,080 

834 

814 

500 

363

1,020 

750 

550 

349 

251

1,070 

500 

185 

321 

259

155 

201 

173 

270 

250

219 

205 

400 

220 

423 

300

Tons 

per 

day

558 

767 

995 

1,360 

498

1,620 

1,200 

1,130 

a 697 

506

1,400 

a 1,020 

a 843 

550 

392

1,670 

a788 

295 

502 

405

238 

300 

253 

354 

a 321

267 

247 

462 

248 

643 

a434

20,963

March

451 

485 

428 

461 

451

420 

382 

428 

432 

451

461 

485 

480 

568 

645

628 

590 

601 

617 

651

651 

601 

595 

612 

606 

601 

640 

590 

584 

656 

726

16,977

219 

159 

227 

400 

350

300 

514 

133 

109 

49

440 

300 

150 

200 

450

620 

950 

1,100 

1,150 

1,100

1,000 

900 

BOO 

700 

600 

500 

480 

460 

550 

750 

700

--

267 

208 

262 

a498 

a426

a 340 

530 

154 

127 

60 

548 

a 393 

194 

307 

784

1,050 

1,510 

ai,780 

1,920 

a 1,930

al,760 

al,460 

a 1,290 

a 1,160 

a 982 

Sll 

a 829 

733 

867 

1,330 

1,370

25,880

a Computed from estimated concentration graph.
SJJN JUAN RIVER BASIN

SAN JUAN RIVER BASIN Continued

SAN JUAN RIVEH NEAR BLUFF, UTAH Continued

Suspended sediment, water j^ear October 1950 to September 1951--Continued

133

Day

1 

------

3__.._.

4 

5 

6 

7 

£_ _ 

9 

10 

11 

12 

13 

14 

15 

16 

17 

1010---*--- 

19 

20 

91*1------

99L ft ------

23_-- _ .

24 ------

25 

9fi *o ---- 

27 

no^0------

29- __

30 

31 

Total1 

2------

------ 

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 

Total

April

Mean

discharge

(cfs)

762 

628 

595 

547 

536 

485 

428 

490 

568 

547

552 

500 

476 

490 

461

356 

352 

319 

413 

500

557 

640 

634 

612 

651

656 

928 

888 

816 

810

17,197

Suspended sediment

Mean 

concentration 

(ppm)

850 

1,380 

500 

480 

300 

200 

220 

400 

500 

400

200 

174 

600 

442 

580

539 

299 

200 

400 

450

500 

550 

540 

800 

830

350 

990 

1,310 

1,200 

1,100

Tons 

per 

day

al,750 

2,340 

803 

709 

434

262 

254 

a 529 

a767 

a 591

298 

235 

771 

585 

a722

518 

284 

172 

446 

a 608

752 

a950 

924 

1,320 

1,460

620 

2,480 

3,140 

a 2, 640 

a2,410

29,774

July

1,410 

1,270 

1,120 

984 

852

786 

697 

656 

584 

536 

617 

574 

531 

476 

391

352 

319 

296 

244 

208 

335 

390 

476 

180 

177

166 

148 

112 

100 

100 

90

15,177 e8,410

May

Mean

discharge

(cfs)

697 

750 

858 

810 

662

595 

542 

702 

1,680 

1,880

1,910 

1,880 

2,000 

2,310 

2,460

2,140 

1,820 

1,670 

1,580 

1,470

1,470 

2,050 

2,580 

2,550 

2,390 

2,400 

3,070 

5,380 

6,990 

17,290 

|6,740

1(1,326

Suspended sediment

Mean 

concentration 

(ppm)

800 

750 

620 

580 

482 

350 

210 

3,300 

4,200 

3,630

3,860 

3,830 

3,580 

3,400 

3,300

3,500 

3,700 

3,650 

3,480 

3,600

3,600 

4,100 

5,700 

5,150 

3,800

3,600 

4,910 

4,800 

4,600 

4,350 

2,200

--

Tons 

per 

day

al,510 

a 1,520 

1,440 

1,270 

862 

a 562 

307 

6,250 

19, 100 

18,400

19,900 

19,400 

a 19, 300 

21,200 

21,900

a 20, 200 

18, 200 

16, 500 

14,800 

a 14, 300

14, 300 

22,700 

39,700 

35, 500 

24, 500

23,300 

s 41, 000 

a 69, 700 

a 86, 800 

85,600 

40,000

720,021

August

138 

140 

501 

1,520 

!l,060

1,340 

1,380 

'1,050 

900 

786 

674 

552 

395 

305 

231

195 

183 

174 

155 

130 

157 

517 

70 

154 

1,240 

1,680 

1,630 

998 

1,070 

1,250 

1,320

21,895 el.160,000

June

Mean

discharge

(cfs)

6,040 

5,410 

4,240 

3,310 

2,900

2,760 

2,590 

2,850 

3,230 

3,570

3,700 

3,660 

3,170 

3,020 

3,090 

2,850 

2,660 

3,340 

3,810 

3,680

3,340 

3,170 

3,210 

3,110 

2,750

2,380 

2,040 

1,910 

1,'700 

1,570

95,060

Suspended sediment

Mean 

concentration 

(ppm)

1,900

1,330

950 

700 

420 

720

472

440 

400 

600

400

400 

450 

297

--

Tons 

per 

day

31,000 

b 23, 000 

b 12, 000 

b6, 000 

b4,500

b3,500 

b3,000 

b5,000 

b9,000 

12,800 

9,490 

6,920 

3,590 

5,870 

b6, 000

b4,500 

b3,500 

b9,700 

b8,400 

4,690

3,970 

3,420 

5,200 

b5,000 

2,970

b2,570 

2,200 

2,320 

1,360 

bl,200

202,670

September

1,340 

1,940 

1,360 

956 

858

720 

521 

495 

437 

432 

331 

315 

250 

200 

160

130 

110 

106 

116 

114 

116 

109 

99 

94 

99

68 

102 

119 

1,180 

9,720

22,617 el,850,000

Total discharge for year (cfs-days).........J................................................... 336,953

Total load for year (tons) ..................|................................................ c 4,131, OOP

e Estimated.

s Computed by subdividing day.

a Computed from estimated concentration graph.

b Computed from estimated water-sediment discharge curve.

c Includes estimated loads for missing days.
SAN JUAN RIVER BASIN--Continued 

SAN JUAN RIVER NEAR BLUFF, UTAH Continued

Particle-size analyses of suspended sediment, October 1950 to J

(Methods of analysis: B, bottom withdrawal tube; D[ decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Oct. 10 ..^.. ..........

Oct. 17 ................

Oct 20

Nov. 10 ................

Nov. 28 ................

Dec. 1 .................

Dec. 5 .................

Dec. 8 .................

Jan. 9, 1951.. ..........

Jan. 12 ................

Jan. 16 ................

Jan. 19 ................

Jan. 24 ................

Jan. 26 ................

Feb. 9 . ...............

Feb. 13 ................

Feb. 16 ................

Feb. 23 ................

Mar. 7. ................

Mar. 10 ................

Mar. 16 ................

Mar. 28 ................

Mar. 30 ................

Apr. 3 .................

Time

8:45 a.m. 

10:10 a. m. 

4:35 p. m. 

4:15 p. m. 

9:45 a.m. 

3:15 p. m. 

3:20 p. m. 

3:35 p. m. 

7:55 a. m. 

10:20 a. m. 

10:30 a.m.

1:45 p.m. 

4:00 p. m. 

11:00 a. m. 

12:00 m.

Water 

discharge 

(cfs)

600 

584 

485 

418 

352 

284 

335 

307 

364 

500 

495

490 

590 

515 

579

464

612 

566

Suspended sedim

Concentration 

of sample 

(ppm)

1,930 

912 

1,140 

334 

515 

347 

643 

163 

555 

990 

359

498 

454 

726 

264

131

237 

611

Concentration 

of suspension 

analyzed 

(ppm)

1,880

991

669 

1,960

1,430

2,040 

1,600 

2,300 

768

415

760 

2,590

Percent finer 

0.002

23

30

11 

5

19

14 

18 

11 

31

47

61 

53

0.004

29

38

16 

22

21

17 

22 

12 

40

51

62 

65

0.008

36

46

30 

27

24

21 

31

15

45

58

64 

79

0.016

46

60

49 

35

34

30 

43 

23 

61

66

70 

87

0.
July 23 .................

8:20 a. m.

.0:00 a. m.

2:00 p. m.

11:30 a.m.

1:30 p.m.

1:30 p. m.

1:30 p. m.

1:30 p. m.

10:10 a.m.

907

601

1,630

4,470

6,820

6,820

3,250

3,170

1,830

697

2,310

4,040

3,890

3,000

3,000

1,150

387

1,460

2,290

--

--

 

 

--

--"

55 -- 73 

57
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER AT LEES FERRY, ARIZ.

LOCATION.--At gaging station, at head of Marble Gorge at Lees Ferry, Coconino County, just upstream fr

State line, 61.5 miles upstream from Little Colorado River, and 79 miles downstream from San Juan R

DRAINAGE AREA. 107,900 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: January to July 1926, October 1926 to June 1927, October 1928 

1947 to September 1951.

tfater temperatures: July 1949 to September 1951.

Sediment records: October 1928 to December 1933, November 1942 to September 1944, October 1947 to S

EXTREMES, 1950-51.--Dissolved solids: Maximum, 1,180 ppm Nov. 1-10; minimum, 283 ppm June 1-10.

Hardness: Maximum, 632 ppm Aug 5-11; minimum, 182 ppm June 1-10 and July 1-10.

Specific conductance: Maximum daily, 1,790 micromhos Jan. 23; minimum daily, 400 micromhos June 24.

Water temperatures: Maximum observed, 82°F July 22-23, 31, Aug. 4; minimum, freezing point Jan. 9-10

Sediment concentrations: Maximum daily, 31,900 ppm Aug. 6; minimum daily, 320" ppm Jan. 15.

Sediment loads: Maximum daily, 2, 090, 000 tons Aug. 6; minimum daily, 3,140 tons Jan. 15. 

EXTREMES, 1928-30, 42-45, 47-51. Dissolved solids: Maximum 1,410 ppm Oct. 11-20, 1928; minimum, 209 

Hardness: Maximum, 720 ppm Oct. 11-20, 1928; minimum, 132 ppm June 11-20, 1944.

Specific corcttictance: (1942-45, 1947-51): Maximum daily, 2,280 micromhos Oct. 15. 1945: minimum dai

Water temperatures: (1949-51): Maximum observed, 82°F July 22-23, 31, Aug. 4, 1951; minimum, freezi

Sediment concentrations: (1928-33, 1942-44, 1947-51): Maximum daily, 83,300 ppm Aug. 11, 1930; mini

Sediment loads: (1928-33, 1942-44, 1947-51): Maximum daily 9,450,000 tons Aug. 7, 1929; minimum da

REMARKS. Records of specific conductance of daily samples available in district office at Albuquerque

1950 to September 1951 given in Water-Supply Paper 1213. Values reported for dissolved solids are 

Chemical analyses, in parts per million, water year October 1950 to S

Date of collection

Oct. 1-10, 1950... 

Oct. 11-20. ...... .

Oct. 21-31. .......

Dec. 21-31 ....... 

Jan. 1-10, 1951. ..

Feb. 11-20 .......

Feb. 21-28 .......

Maan 

discharge 

(cfs)

6,426 

5,366 

4,935 

4,931 

5,660 

7,046

7,098 

6,525 

6,640 

5,261 

4,314 

5,745

4,954 

7,268 

7.445

Silica 

(SiO,)

13 

11 

8.8 

8.7 

9.1 

12

12 

11 

11 

12 

12 

12

12 

12 

9.5

Iron 

(Fe)

0.01 

.01 

.02 

.03 

.01 

.02

.00 

.01 

.01 

.02 

.02 

.02

.02 

.01 

.01

Calcium 

(Ca)

129 

121 

122 

127 

124 

126

108 

113 

106 

112 

121 

120

108 

108 

95

Magnesium 

(Mg)

48 

50 

56 

58 

57 

56

48 

53 

50 

47 

50 

51

45 

43 

42

Sodium 

(Na)

150 

147 

163 

174 

169 

152

135 

147 

139 

147 

162 

167

144 

147 

132

Potassium 

(K)

8.0 

8.2 

8.0 

8.6 

9.2 

8.0

5.6 

4.0 

5.2 

5.2 

7.0 

6.2

4.6 

5.6 

4.8

Bicarbonate 

(HCO,)

222 

215 

206 

216 

231 

238

227 

229 

229 

230 

244 

249

a 231 

b223 

208

SuUate 

(S04 )

514 

502 

538 

563 

533 

511

428 

446 

414 

435 

460 

457

394 

404 

371

Chloride 

(Cl)

94 

102 

115 

129 

130 

117

96 

114 

106 

118 

140 

140

116 

122 

97

FIuoride 

(F)

0.5 

.4 

.4 

.4 

.4 

.4

.4 

.3 

.3 

.2 

.3 

.2

.2 

.3 

.2

Nitrate 

(NO,)

4.4 

4.1 

4.1 

3.6 

3.6 

4.1

4.1 

4.2 

4.0 

4.3 

4.5 

4.8

4.1 

4.4 

3.3

Boron 

(B)

0.4 

.4 

.4 

.3 

.3 

.3

.1 

.1 

.1 

.2 

.4 

.3

.4 

.3 

.4

Par

pe

mil

lio

1,

1,

1,

1,

1,

1,

1,

1,

1,

a Includes equivalent of 5 parts per million of carbonate (CO3). 

b Includes equivalent of 6 parts per million of carbonate (CO3).
Mar. 21-31...... .

Apr. 21-30 .......

May 11-20. .......

June 21-30. .......

July 1-10.........

July 11-20...... ..

July 21-31........

Aug. 12-20 .......

Sept. 1-10........

Sept. 21-30..... ..

Weighted average .

6,459 

7,978

10, 490

23, 070

40, 710

54, 770

32,310

19, 000

15, 540

15,600

11.160

10, 370

4,691

13, 560

16 

14

15

15

13

12

15

16

12

14

.04 

.02

.04

.03

.04

.02

.02

.01

.02

0.04

99

94 

88

79

65

50

71

96

156

123

79

45

42 

40

22

14

21

26

50

27

132

77

107

136

72

3.2

9

0

7 P

8.6

4.9

218

207

200

185

353

255

OQ4

498

235

107

CO

101

52

.4

.4 

.4

.5

.4

.2

.4

.2

.4

0.4

3.7 

2.6

.9

2.2

3.0

2.2

.1

.14

--

1,

c Reported boron concentration is less than figure indicated.
138 COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER AT LEES FERRY, ARIZ. Continued

Temperature (°F) of water, water year October 1950 to September 1951 

(Once daily temperature measurement, generally prior to 11 a. m:)

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

Average

Oct.

a 64

60

57

62

62

63

63

63

62

63

65

64

a65

65

65

63

62

a 66

65

a 62

62

63

63

59

62

a 63

63

59

a 59

58

57

62

Nov.

a 58

57

57

56

53

a 54

53

52

46

44

a 43

a 42

44

a45

a45

44

44

a43

44

a 51

a 50

a 48

a47

a47

a45

45

a 44

44

--

48

Dec.

a45

45

43

a 44

44

a 43

42

42

42

a 42

a 42

a41

a41

a 42

41

_

a 41

a 40

a 40

a41

a 41

a41

39

a 38

38

a 36

a 37

36

a 36

36

36

40

Jan.

a37

a35

a35

a 36

a 36

..

a35

a 33

a32

a 32

a 33

a33

a 34

_

a 34

a 34

a 36

a 36

a 37

a 36

a 36

a37

a 39

a 39

a 39

a39

35

a 40

a 40

a 40

a 38

36

Feb.

a35

a33

a 33

a35

a 37

a 39

a 41

a 39

a 41

40

a 41

a 43

a 41

a 41

a 38

a 39

a 39

a 40

a 43

a 42

a 42

_

a 42

44

43

a45

a 44

41

__

-.

--

40

Mar.

a 43

a 42

42

40

a 44

a 44

a 47

a 48

a 48

48

46

a 46

a 49

a 48

a50

a 53

a 48

_

a 49

a 48

51

51

a 52

a 51

--

a 52

a 52

a 52

a 51

a 52

a 51

48

Apr.

50

a 55

a 56

a 56

56

56

57

57

a 60

a 60

a56

a 59

a 60

a61

60

a61

a 62

62

a 59

a 59

a 62

63

a65

a 62

a 62

a 60

a 61

61

57

56

--

59

May

53

55

58

59

61

62

62

65

a 64

a 66

66

66

63

a61

a 61

a 60

60

63

63

65

a 66

65

65

65

66

66

68

67

68

a 68

67

63

June

62

60

62

a 64

a64

a 63

a63

a 63

a67

64

64

a 68

a 68

67

68

69

73

70

a71

71

70

70

70

70

69

70

68

69

70

72

--

67

July

71

a 76

72

73

73

73

74

a77

75

75

a 76

77

77

79

a 80

79

81

81

80

81

82

a82

a81

80

a81

80

80

79

80

82

78

Aug.

81

80

79

a 82

77

77

a 79

76

a 79

a 78

76

77

76

76

a 79

78

a 79

80

79

a 78

77

77

76

75

a 75

74

75

74

70

a 71

71

77

Sept.

71

72

71

a 74

72

72

72

72

--

72

72

a 72

a69

a 72

68

71

a71

a 71

a 72

70

68

68

67

68

68

68

67

67

67

--

--

70

a Observed between 11 a. m. and 6 p. m.
COLORADO RIVER MAIN STEM 139

COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER AT LEES FERRY, ARIZ. Continued

Suspended sediment, water year October 1950 to September 1951

Day

1ft

21

22

OR

97

np

29

Total -

i Q

22 

23 ----- 

24 

25 -----

26 

27 

28 

29 

30 

31 

Total

October

Mean

charge

(cfs)

7,250 

7,280 

6,910 

6,700 

6,410

6,050 

5,810 

5,960 

6,020 

5,870 

5,720 

5,720 

5,720 

5,520 

5,400 

5,260 

5,070 

5,020 

5,180 

5,050

4,890 

4,890 

5,100 

5,180 

5,050 

5,070 

4,940 

4,820 

4,760 

4,790 

4,790

172, 200

Suspended sediment

Mean 

concentration 

(ppm)

3,310 

2,700 

2,270 

1,810 

1,810

1,500 

1,540 

1,620 

1,560 

1,310

1,290 

1,160 

1,090 

1,050 

980 

960 

1,880 

970 

1,010 

810

850 

640 

640 

650 

730

800 

690 

790 

790 

720 

780

Tons 

per 

day

64, 800 

53, 100 

42,400 

32, 700 

31,300

24,500 

24, 200 

26, 100 

25,400 

20, 800

19, 900 

17, 900 

16, 800 

15,600 

14, 300 

13, 600 

25, 700 

13, 100 

14, 100 

11,000

11,200 

8,450 

8,800 

9,090 

9,950

11,000 

9,200 

10, 300 

10,200 

9,310 

10, 100

614, 900

January

5,430 

5,350 

5,370 

5,490 

5,430

5,230 

5,320 

5,210 

5,020 

4,760

4,520 

4,270 

3,790 

3,600 

3,640

4,250 

4,690 

4,860 

4,860 

4,660 

4,690 

4,920 

5,260 

5,630 

5,840

5,810 

5,810 

6,020 

6,310 

6,370 

6,540

158,950

970 

1,070 

780 

1,050 

1,120

1,090 

1,060 

1,000 

1,020 

1,220

770 

590 

420 

370 

320

460 

560 

590 

720 

580 

520 

680 

1,360 

1,330 

1,160

810 

980 

820 

1,010 

1,160 

1,190

--

14, 200 

15,400 

11, 300 

15,600 

16, 400

a 15, 400 

15,200 

14, 100 

13, 800 

15,700

9,400 

6,800 

4,300 

a 3, 600 

3,140 

5,280 

7,100 

7,740 

9,450 

7,300 

6,580 

9,030 

19, 300 

20, 200 

18, 300 

12, 700 

15, 400 

13, 300 

17, 200 

20, 000 

21,000

384, 220

November

Mean

charge

(cfs)

4,640 

4,640 

4,760 

4,990 

5,020

4,970 

4,970 

5,050 

5,120 

5,150

5,260 

5,520 

5,490 

5,430 

5,460 

5,660 

5,870 

5,960 

5,990 

5,960

6,280 

6,500 

6,500 

6,470 

6,940

7,320 

7,350 

7,490 

7,840 

7,770

176, 370

Suspended sediment

Mean 

concentration 

(ppm)

610 

710 

620 

920 

840

760 

800 

780 

890 

930 

1,060 

1,150 

910 

690 

770 

870 

970 

900 

990 

1,140

1,020 

1,230 

1,290 

1,350 

1,350 

1,130 

1,500 

1,810 

1,930 

1,460

Tons 

per 

day

7,640 

8,890 

7,970 

12,400 

a 11, 400

10, 200 

10, 700 

10, 600 

12, 300 

12, 900 

15, 100 

17, 100 

13,500 

10, 100 

11, 400 

13, 300 

15,400 

14,500 

16, 000 

18, 300

17, 300 

21,600 

a 22, 600 

23, 600 

25,300

22, 300 

29, 800 

36, 600 

40, 900 

30, 600

520, 300

February

6,810 

6,400 

6,120 

4,820 

3,550

3,060 

3,320 

3,970 

5,070 

6,120

7,080 

7,420 

6,940 

7,010 

7,380

7,460 

7,380 

7,380 

7,420 

7,210 

7,040 

7,110 

7,660 

7,950 

7,920

7,380 

7,180 

7,320

181,780

1,150 

1,170 

1,280 

820 

560

510 

490 

600 

1,040 

1,220

1,210 

1,310 

1,550 

1,460 

1,470

1,360 

1,360 

1,440 

1,350 

1,460 

1,130 

1,240 

1,370 

1,390 

.1,340 

1,360 

1,280 

1,090

21, 100 

21,200 

21, 200 

10, 700 

5,370 

4,210 

4,400 

6,430 

14, 200 

20, 200

23, 100 

26, 200 

29, 000 

27, 600 

29, 300

27,400 

27, 100 

28,700 

27,000 

28, 400 

21,500 

a 23, 800 

28, 300 

29, 800 

28, 600 

27, 100 

24, 800 

21,500

608, 210

December

Mean

charge

(cfs)

6,460 

7,380 

7,350 

7,040 

7,110

7,180 

7,080 

6,840 

6,770 

6,770

6,700 

6,570 

6,310 

6,340 

6,570 

6,740 

6,670 

6,440 

6,340 

6,570

7,040 

7,460 

7,560 

7,180 

6,770

6,670 

6,670 

6,370 

6,020 

5,750 

5,550

209, 270

Suspended sediment

Mean 

concentration 

(ppm)

1,550 

1,500 

1,220 

970 

1,280

1,280 

1,160 

1,520 

1,370 

1,160

1,090 

1,000 

980 

1,090 

1,220 

1,260 

1,300 

1,260 

1,300 

1,100

1,150 

1,230 

1,240 

1,110 

1,220

960 

980 

980 

1,140 

850 

1,140

--

Tons 

per 

day

31,200 

29,900 

24,200 

18,400 

24, 600

24, 800 

22,200 

28, 100 

25,000 

21, 200

19,700 

17, 700 

16,700 

18, 700 

21,600 

a 22, 900 

23,400 

21,900 

22, 300 

19,500

21,900 

24, 800 

25,300 

21,500 

22,300

17, 300 

17, 600 

16, 900 

18, 500 

13, 200 

17, 100

670, 400

March

7,380 

7,380 

7,490 

7,520 

7,210

7,040 

7,150 

6,870 

6,570 

6,440

6,240 

6,020 

6,500 

7,080 

6,980

7,040 

7,350 

7,490 

7,040 

6,700 

6,700 

6,770 

6,770 

6,770 

6,440

6,150 

5,960 

6,080 

6,240 

6,470 

6,700

210, 540

1,500 

1,200 

1,210 

1,230 

1,000

990 

890 

890 

780 

810

1,130 

950 

900 

970 

1,050

870 

1,030 

1,050 

1,070 

1,040 

1,080 

1,100 

1,270 

1,160 

1,190 

1,230 

1,090 

1,240 

1,040 

1,120 

1,110

29, 900 

23,900 

24,500 

25,000 

19,500 

18,800 

17,200 

16, 500 

13, 800 

14, 100

19,000 

15,400 

15, 800 

18, 500 

19, 800

16,500 

20,400 

1 2 1,200 

20, 300 

18, 800 

19,500 

20, 100 

23, 200 

21,200 

i 20, 700

20, 400 

17,500 

20, 400 

17,500 

19,600 

20, 100

609, 100

a Computed from estimated concentration graph.
140 COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER AT LEES FERRY, ARIZ.--Continued 

Suspended sediment, water year October 1950 to September 1951 Continued

Day

2

3

10 ------

1ft

21 -

23

25

no

30 -«

31 

Totalg

9 

19

13 

14 -----

17 

i A

19 

20 

22 ----- 

23 ----- 

24 

25 -----

26 ----- 

27 ----- 

28 ----- 

29 ----- 

30 

31 

Total

April

Mean

charge

(cfs)

6,840 

7,700 

8,850 

8,930 

8,280 

8,100 

8,280 

8,060 

7,490 

7,250

7,280 

7,600 

7,660 

8,060 

8,700

8,930 

9,040 

8,770 

8,540 

8,510

8,100 

7,700 

7,810 

7,920 

8,850

10,400 

11, 500 

13, 100 

14, 600 

14, 900

267, 750

Suspended sediment

Mean 

concentration 

(ppm)

1,030 

1,480 

1,530 

1,500 

1,390

1,730 

1,580 

1,860 

2,400 

2,520

2,310 

2,300 

2,340 

2,250 

2,140

1,950 

2,090 

2,100 

2,330 

2,390

2,340 

2,120 

1,830 

1,660 

1,750

2,050 

2,420 

2,650 

2,800 

3,160

--

Tons 

per 

day

19, 000 

30, 800 

36, 600 

36, 200 

31, 100

37, 800 

35, 300 

40, 500 

48,500 

49, 300

45, 400 

47, 200 

48, 400 

49, 000 

50,300

47,000 

51, 000 

49, 700 

53,700 

54,900

51, 200 

44, 100 

38, 600 

35,500 

41,800

57, 600 

75,100 

93, 700 

110,000 

127, 000

1, 536, 300

July

43, 100 

39, 300 

37, 000 

34, 700 

31,600

30,000 

29, 200 

28, 000 

26,000 

24, 200 

23, 100 

21, 700 

21,100 

20,400 

19,200

18,000 

17, 700 

17, 100 

16,000 

15,700 

15, 700 

16,500 

16, 200 

15,400 

15,400

15, 100 

16,500 

15,700 

15,100 

14,400 

14, 900

684,000

2,180 

1,770 

1,970 

1,860 

1,980 

1,560 

1,560 

1,500 

1,500 

1,330 

1,280 

1,200 

1,320 

1,230 

1,240

1,100 

1,100 

1,100 

990 

970 

1,080 

1,120 

1,100 

2,150 

2,000

2,320 

2,380 

2,030 

1,720 

2,400 

3,000

--

Total discharge for year (cfsTotal load for year (tons)

254, 000 

188, 000 

197, 000 

174,000 

169, 000 

126, 000 

123, 000 

a 113, 000 

105,000 

86, 900 

79, 800 

70, 300 

75, 200 

67, 700 

64, 300

53,500 

52, 600 

50,800 

42, 800 

41, 100 

45, 800 

49, 900 

48,100 

89, 400 

83, 200

94, 600 

106, 000 

86, 000 

70, 100 

93, 300 

121,000

3, 021, 400

May

Mean

charge

(cfs)

14,900 

15,400 

15,700 

16,200 

16, 200 

15,400 

14, 600 

14, 400 

14, 100 

14, 100

15, 700 

18, 000 

20, 100 

22,700 

25,300

26, 400 

26, 000 

26, 000 

25, 600 

24, 900

25, 300 

28,000 

32, 100 

37,000 

37, 900

39, 300 

41, 200 

42, 100 

47, 100 

55, 000 

62, 800

829, 500

Suspended sediment

Mean 

concentration 

(ppm)

3,080 

3,000 

3,200 

2,950 

2,800

2,470 

2,290 

2,210 

1,900 

2,010

2,060 

2,390 

2,970 

3,420 

3,730

3,840 

3,760 

3,660 

3,600 

3,050

2,880 

3,120 

3,580 

4,380 

4,860

5,100 

4,600 

4,620 

5,020 

5,490 

5,500

-

Tons 

per 

day

124, 000 

125,000 

136, 000 

129,000 

122, 000

103, 000 

90,300 

85,900 

72, 300 

76,500

87, 300 

116, 000 

161, 000 

210, 000 

255, 000

274, 000 

264,000 

257,000 

249, 000 

205, 000

195,000 

236,000 

310,000 

438, 000 

497, 000

541,000 

512, 000 

525,000 

638, 000 

815,000 

933, 000

8, 782, 300

August

14, 100 

13,600 

13, 600 

21, 100 

22, 400 

23, 400 

22, 700 

18, 300 

16,800 

15,700 

14,600 

14, 100 

13, 600 

12, 900 

12, 000

11,100 

10, 200 

9,400 

8,770 

8,360 

8,130 

8,020 

7.840 

7,320 

7,320

7,770 

7,420 

9,080 

11,500 

13, 400 

12, 200

396, 730

5,400 

4,150 

5,400 

31,200 

25,200 

31,900 

17,200 

16, 200 

18, 500 

18, 800 

14, 000 

9,700 

7,600 

5,200 

4,970

4,300 

3,570 

2,860 

2,610 

1,990 

1,700 

2,030 

1,430 

2,210 

1,320

2,210 

4,360 

5,520 

14, 700 

20, 200 

15,500

--

a 206, 000 

152,000 

198, 000 

81,850,000 

1,520,000 

52,090,000 

s 1,070,000 

800, 000 

839, 000 

797, 000 

552, 000 

369, 000 

279, 000 

181,000 

161,000

129, 000 

98, 300 

72, 600 

61, 800 

44, 900 

37, 300 

44, 000 

30,300 

43, 700 

26, 100

46, 400 

87, 300 

s 141, 000 

459,000 

731, 000 

511, 000

13,627,000

June

Mean

charge

(cfs)

66, 200 

63, 900 

63,900 

61, 700 

58, 300

54, 000 

50,200 

46, 600 

43, 100 

39, 800

38, 800 

38, 800 

37,900 

37, 000 

35,200

33,800 

33, 400 

34, 300 

37, 400 

43, 600

49, 700 

52, 900 

57, 200 

60, 600 

61, 700

58, 300 

54,000 

50,200 

47, 600 

45, 100

1,455,200

Suspended sediment

Mean 

concentration 

(ppm)

5,540 

5,080 

4,800 

4,100 

3,620

4,000 

3,530 

3,320 

3,000 

3,400

2,910 

2,860 

2,460 

2,580 

2,270

2,400 

2,020 

1,990 

2,240 

2,830

3,150 

3,800 

2,950 

3,300 

3,310

3,800 

3,530 

3,020 

2,740 

2,480

Tons 

per 

day

990, 000 

876, 000 

828, 000 

683, 000 

570,000

583, 000 

478, 000 

418, 000 

349, 000 

365, 000

305,000 

300, 000 

252, 000 

258, 000 

216, 000

219,000 

182, 000 

1«4, 000 

226, 000 

333, 000

423, 000 

543, 000 

456,000 

540, 000 

551,000

598, 000 

515,000 

409, 000 

352, 000 

302, 000

13,304,000

September

13,900 

14, 400 

12, 200 

11,100 

11,100

9,930 

8,730 

8,060 

7,380 

6,910 

6,570 

6,600 

6,500 

6,150 

5,750

5,430 

5,070 

4,940 

4,760 

4,660 

4,660 

4,590 

4,560 

4,560 

4,540

4,590 

4,490 

4,390 

4,690 

5,840

207,050

20, 100 

14, 400 

12, 400 

16, 500 

16,800

12, 300 

9,750 

6,840 

5,080 

5,330 

6,120 

4,880 

3,610 

2,540 

2,110

1,610 

1,330 

1,270 

1,110 

1,090 

1,010 

1,090 

1,070 

1,030 

870

920 

850 

790 

2,540 

3,750

--

,

754,000 

560, 000 

408, 000 

494, 000 

503,000 

330, 000 

230, 000 

149,000 

a 101, 000 

99,400 

109,000 

87,000 

63, 400 

42, 200 

32, 800

23, 600 

18, 200 

16, 900 

14,300 

13, 700 

12, 700 

13,500 

13, 200 

12, 700 

10, 700

11,400 

10, 300 

9,360 

s 33, 000 

s 58, 400

4, 234, 760

4, 949, 340 

7, 913, 590

s Computed by subdividing day.

a Computed from estimated concentration graph.
COLORADO RIVER MAIN STEM--Continued 

COLORADO RIVER AT LEES FERRY, ARIZ. Continued

Particle-size analyses of suspended sediment, water year October 1950 to 

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Nov. 13 ................

Dec. 7, 11, 14,18, 21, 25 

Dec. 28, 1950, Jan. 1, 4,

Jan. 25, 29, Feb. 1, 5, 8. 

Feb. 15, 19, 23, 26, Mar.

Aor. 21 ................

Time

10:00 a. m. 

9:15 a.m. 

9:00 a.m. 

9:15 a.m. 

8:15 a.m.

9:15 a.m. 

10:15 a. m. 

1:30 p.m. 

8:30 a. m.

9:00 a. m. 

9:45 a.m. 

12:15 p.m. 

11:30 a.m.

10:30 a.m. 

11:30 a.m. 

11:45 a.m. 

9:30 a. m.

2:45 p.m. 

[Composite)

(Composite) 

(Composite) 

(Composite)

(Composite)

9:00 a.m. 

11:30 a. m. 

12:30 P. m.

Water 

discharge 

(cfs)

7,280 

6,540 

6,050 

5,720 

5,290

5,180 

5,070 

5,100 

4,760

4,590 

4,990 

5,490 

5,660

5,930 

6,440 

7,380 

7,770

6,940 

6,720

5,620 

4,480 

5,300

7,160

6,870 

7,250 

8.060

Suspended sedim

Concentration 

of sample 

(ppm)

2,740 

1,670 

1,750 

1,150 

1,000

1,020 

1,040 

1,150 

998

1,060 

1,090 

1,530 

1,290

1,100 

1,980 

1,530 

1,790

1,270 

1,320

1,060 

930 

1,230

1,350

1,010 

2,140 

2.110

Concentration 

of suspension 

analyzed 

(ppm)

4,660 

1,270 

4,140 

2,530 

2,280

1,450

3,910 

6,430

4,520

6,430 

7,750

1,820

708 

1,150

3,180

719 

3,710 

1.770

Percent finer 

0.002

20 

32 

19 

14 

17

10

12

8

11

10 

11

11

18 

17

12

12 

54 

38

0.004

31 

42 

26 

20 

23

13

14 

10

14

13 

16

14

20 

20

16

58 

51

0.008

41 

54 

34 

28 

28

16

17 

13

18

18 

22

17

25 

23

19

16 

64 

63

0.016

49 

61 

42 

35 

35

21

25 

20

28

27 

29

20

28 

26

23

17 

67 

70

0.
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER AT LEES FERRY, ARIZ. Continue

Particle-size analyses of suspended sediment, water year October 1950 to Septe

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S, 

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Aoe. 28 ................

Time

8:50 a.m. 

10:20 a. m. 

11:15 a.m. 

10:15 a.m.

9:30 a. m. 

9:30 a. m. 

10:30 a. m. 

10:30 a.m.

9:15 a.m. 

9:15 a.m. 

4:30 p.m. 

5:00 p. m. 

11:20 a.m. 

9:30 a.m. 

10:40 a. m.

10:00 a. m. 

10:00 a. m. 

11:45 a. m.

9:30 a. m. 

7:30 p.m. 

7:30 p.m. 

7:30 p.m. 

7:30 p.m.

11:45 a.m. 

6:15 a. m. 

10:15 a.m. 

10:30 a.m.

Water 

discharge 

(cfs)

14, 700 

15,500 

24,900 

36, 500

46,900 

46,900 

62, 800 

62,800

65,900 

65,900 

57, 500 

42, 200 

36,700 

57,700 

62,300

32, 50C 

19,200 

15,000

14,200 

23,600 

23,600 

23, 600 

23,600

23,800 

18,900 

9,400 

8.620

Suspended sedim

Concentration 

of sample 

(ppm)

2,960

2,370 

4,100

4,800 

4,800 

5,000 

5,000

5,700 

5,700 

3,240 

3,500 

1,780 

2,900 

3,210

1,690 

1,310 

1,620

6,300 

31,000 

31,000 

31,000 

31,000

15,100 

17,400 

3,240 

4.030

Concentration 

of suspension 

analyzed 

(ppm)

3,930 

3,160 

1,280 

2,660

2,720 

1,270 

2,350 

1,770

3,050 

1,700 

1,540 

1,630 

892 

1,700 

3,440

1,240 

1,880

3,650 

2,760 

2,460 

2,260 

2,230

4,190 

5,600 

2,810 

4.150

Percent finer t

0.002

20

16 

14 

21 

18

16 

16

10 

16

40 

16 

44 

12

0.004

25 

27 

34 

24

19 

19 

24 

23

20 

21 

14 

7 

12 

32 

13

18 

34

65 

57 

17 

58 

18

55 

49 

59 

69

0.008

34

23 

23

27 

29

26 

26

15 

20

69 

32 

71 

25

0.016

42 

42

44 

48

31 

29 

35 

37

31 

32 

26 

24 

20 

54 

21

24 

64

87 

82 

81 

82 

81

83 

72 

81 

86

0.0
Sept. 30. ................ 4:00 p.m.

15,600

4,690

5,810

20,900

4,080 4,540

_

49

46

"

60

67

61

73

72

"

82

81

81

84

66
144 COLORADO RIVER BASIN

PARIA RIVER BASIN 

PARIA RIVER AT LEES FERRY, ARIZ.

LOCATION. At gaging station, half a mile upstream from mouth and one mile northwest of

Lees Ferry, Coconino County.

DRAINAGE AREA.--1,570 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: October 1947 to February 1950.

Sediment records: October 1947 to September 1951. 

EXTREMES, 1950-51. Sediment concentrations: Maximum daily, 209,000 ppm Aug. 4; minimum

daily, 2 ppm Oct. 21 to Nov. 13. 

Sediment loads: Maximum daily, 713,000 tons Aug. 4; minimum daily, less than 0.05 ton

Oct. 11 31. 

EXTREMES, 1947-51. Sediment concentrations: Maximum daily, 332,000 ppm June 19, 1949;

minimum daily, 1 ppm June 1-10, 1950. 

Sediment loads: Maximum daily, 775,000 tons Aug. 5, 1948; minimum daily, less than 0.05

ton on many days. 

REMARKS. Records of discharge for water year October 1950 to September 1951 given in

Water-Supply Paper 1213.

Suspended sediment, water year October 1950 to September 1951

Day

1 ......

2 

3 ......

4 ......

5 ......

6 ......

7 

9 ......

10 -~

11 ......

12

13 _._.-_

14 ..... .

15 

16 ----- -

17 ......

18 

19 

20 

21 

22------

23 

24 

25 

26 ......

27 

28 ......

29 ......

30 

31 ------

TotalOctober

Mean 

discharge

(cfs)

4.7

4.7

5.0

5.0

5.0

5.4 

6.1

6. 1 

6.9 

7.3

8. 0

7.3 

6.1

5.8

5.4

5.0

4.7

6.1

6.1

5.8

6

6

6

6

6

6.1

6.5

6.9

7.7

7.7

7.7

189.1

Suspended sediment

Mean 

concentration 

(ppm)

7

3

2

--

Tons 

per 

day

0.1

(t)

(t)

1.9

November

Mean 

discharge

(cfs)

8

/1

. u

8. 4

8. 0

8

0

. o

9.6

10 

11

10 

10

10

9.6 

9.2

13 

18

23

25

22

22

23

25

26

23

22

21

20

20

20

20

21

22

498.6

Suspended sediment

Mean 

concentration 

(ppm)

2

2

120

195

210

280

265

180

230

230

215

200

185

170

115

50

60

130

50

--

Tons 

per 

day

0.1

.1

5.8

12

14

a!7

16

11

16

16

a 13

12

10

9.2

6.2

2.7

3.2

7.4

3.0

175.8

December

Mean 

discharge

(cfs)

23

&&99 

21

19 

20

20 

19

20 

20

19

20 

21

22 

20

22

22

21

20

19

21

20

20

20

20

21

22

20

20

24

25

23

646

Suspended sediment

Mean 

concentration 

(ppm)

onoU

140

180

80 

120

150 

80

100 

80

100

100 

110

30 

40

80

70

60

40

30

30

75

90

183

267

400

724

563

702

687

598

790

Tons 

per 

day

5.0

8

4

. J

10

4.1 

6.5

8.1 

4.1

5.4 

4.3

5.1

5.4 

6.2

1.8 

2.2

4.8

4.2

3.4

2.2

1.5

1.7

4.0

4.9

sll

s!7

s27

s54

s34

s42

s47

s43

49

'- 27. 2

s Computed by subdividing day.

t Less than 0.05 ton.

a Computed from estimated concentration graph.
PARIA RIVER BASIN 145

PARIA RIVER BASIN Continued

PARIA RIVER AT LEES FERRY, ARIZ.--Continued

Suspended sediment, water year October 1950 to September 1951--Continued

Day

19

1ft

21 

22

An

29

31 ......

Total2

7 

9 .....

11 

12

16 

17 ----- 

18 ----- 

19 

20 

21 

22 

23 

24 ----- 

25 -----

26 ----- 

27 

28 ----- 

29 ----- 

30 ----- 

SI 

Total

January

Mean

charge

(cfs)

25 

16 

11 

9.2 

21

25 

16 

7 

12 

9

11 

18 

14 

14 

18

19 

18 

23 

28 

35

23 

19 

30 

37 

31 

28 

26 

25 

28 

32 

25

652.2

Suspended sediment

Mean 

concentration 

(ppm)

580 

450 

353 

170 

490

460 

470 

340 

540 

300

220 

450 

300 

200 

360

345 

380 

380 

475 

2,520

2,590 

1,110 

1,460 

2,050 

1,880 

1,150 

700 

550 

950 

1,000 

950

--

April

48 

25 

17 

13 

12

11 

14 

11 

9.2 

7.7

6.5 

6.9 

6.5 

5.4 

5.0

5.4 

5.4 

6.1 

6.5 

17

26 

21 

16 

12 

8.4

7.7 

6.9 

9.6 

10 

28

384.2

6,700 

4,300 

1,200 

430 

350

350 

450 

240 

310 

160

70 

30

2,410

3,700 

3,900 

950 

750 

650

500 

330 

210 

250 

2,950

--

Tons 

per 

day

39 

19 

10 

4.2 

28

sa34 

20 

6.4 

Sl9 

7.3

6.5 

22 

11 

7.6 

17

18 

18

24 

36 

S245

s!74 

s60 

s!39 

s236 

S190 

87 

49 

37 

72 

86 

64

1,786.0

si, 000 

a 290 

a 55 

15 

all

10 

17 

7.1 

7.7 

3.3

1.2 

.5

S304

206 

221 

41 

24 

a!5

alO 

6.1 

5.4 

6.8 

S358

2,672.6

February

Mean

charge

(cfs)

7 

8 

8 

10 

35

46 

32 

29 

25 

23

23 

22 

20 

14 

12

15 

16 

18 

19 

16

16 

18 

16 

16 

17 

19 

21 

23

544

Suspended sediment

Mean 

concentration 

(ppm)

550 

600 

400 

200 

2,520

2,720 

2,350 

1,600 

900 

780

460 

390 

450 

330 

110

160 

120 

200 

470 

520

370 

420 

470 

300 

350 

370 

300 

460

--

Tons 

per 

day

10 

s!3 

s9. 5 

5.4 

s306

338 

203 

125 

61 

48

29 

23 

24 

12 

3.6

6.5 

5.2 

9.7 

24 

22

16 

20 

20 

13 

16 

19 

17 

29

1,427.9

May

32 

22 

20 

16 

11

9.2 

4.3 

5.0 

4.7 

5.0

4.7 

4.4 

4.1 

5.4 

59

65 

39 

24 

17 

25

18 

13 

12 

32 

22

14 

8.8 

5.8 

3.8 

3.8 

3.5

516.5

8,220 

14,800 

18,800 

9,700 

3,800

1,500 

310 

160 

100 

80

30 

50 

30 

20 

42, 500 

38,000 

32,500 

28,000 

18,000 

9,000

5,000 

12,000 

19, 500 

37, 500 

70, 000

31,000 

11,000 

1,920 

480 

240 

175

--

S688 

879 

1,020 

419 

alls 

37 

6.1 

2.2 

1.3 

1.1 

.4 

.6 

.3 

.3 

516,100

87,350 

3,550 

1,810 

826 

608

243 

421 

632 

3,360 

4,310

1,170 

261 

30 

4.9 

2.5 

l.B

43,848.3

March

Mean

charge

(cfs)

23

22 

24 

23 

22

23 

27 

25 

25 

23

20 

16 

14 

17 

16

15 

13 

11 

10 

14

14 

12 

11 

12 

12 

11 

10 

8.8 

8.8 

8.8 

13

504.4

Suspended sediment

Mean 

concentration 

(ppm)

540 

450 

760 

720 

780

600 

700 

640 

600 

1,500

3,000 

2,050 

3,050 

850 

560

570 

400 

300 

300 

290

240 

320 

270 

160 

110 

60 

90 

75 

60 

60 

60

Tons 

per 

day

34

27 

49 

45 

46

37 

51 

43 

40 

93

162 

89 

115 

39

24

23 

14 

a8.9 

8.1 

11

9.1 

10 

8.0 

5.2 

a3.6 

1.8 

2.4 

al.8 

1.4 

1.4 

2.1

L 1,005.8

June

3.2

3.8 

4.1 

4.7 

4.1

4.1 

4.1

4.1 

4.1 

3. 8

3.2 

3.5 

3.5 

4.1 

4.4

4.7 

4.7 

3.8 

3.5 

4.1

4.1 

4.1 

4.1 

4.4 

4.1

3. 8 

3.8 

3.2 

3.5 

3.2

117.9

145 

79

27

25 

17

--

1.2 

.8

.3

.3

.1

8.8

s Computed by subdividing day.

a Computed from estimated concentration graph.
146 COLORADO RIVER BASIN

PARIA RIVER BASIN Continued

PARIA RIVER AT LEES .FERRY, ARIZ.--Continued

Suspended sediment, water year October 1950 to September 1951 - -Continued

Day

3

Q

o/l

23

27

OP

29 

30 

31 

TotalJuly

Mean

discharge

(cfs)

3.8 

3. 8 

3.2 

3.5 

3.2

2.9 

3.5 

3.5

3 2 3*\ 

. &

2 9 

3.2 

3.5 

3.8 

3.8

4.1 

5.0 

4.1 

4.4 

7.2

22 

6.1 

4.4 

7.7 

5.8

4.7 

4.4 

4.7 

4.7 

4.4 

4.4

149.1

Suspended sediment

Mean 

concentration 

(ppm)

12

16

8,240

19,700 

6,000 

1,000 

1,370 

1,500

120 

72 

61 

63 

54 

63

--

Tons 

per 

day

0.1

.2

s341

82,710 

99 

12 

28 

23

1.5 

.9 

.8 

.8 

.6 

.7

3,221.1

August

Mean 

discharge

(cfs)

5.0 

4.4 

41 

762 

126

44 

18 

12 

7.8 

5.6

4.5 

3.7 

3.7 

3.7 

4.0

4.0 

4.2 

4.0 

4.0 

4.0

4.0 

18 

16 

12 

7.8

5.0 

4.5 

5.3 

758 

503 

65

2,464.2

Suspended sediment

Mean 

concentration 

(ppm)

35 

59 

22,100 

209,000 

91,700

78,800 

64,000 

64,000 

35,000 

8,500 

1,000 

300 

220 

160 

110

100 

80

\ 22

6,200 

36,000 

97,000 

59,000

19,800 

7,600 

1,400 

105,000 

131,000 

81,300

-

Tons 

per 

day

0.5 

.7 

s!7,200 

8713,000 

334,000

slO.100 

3,2?0 

2,150 

764 

129

12 

3.0 

2.0 

1.6 

1.2

1.1 

.9

.2

S485 

1,560 

3,380 

1,290

267 

92 

20 

S428.000 

s208,000 

15,700

1,439,380.8

September

Mean

charge

(cfs)

25

17 

13 

10 

8.8

7.5 

5.8 

4.9 

4.3 

4.0

3.8 

3.5 

3.8 

4.0 

4.0

3. 8 

4.0 

4.0 

4.0 

4.0

3.8 

3.8 

4.0 

4.3 

4.3

4.3 

4.3 

5.8 

105 

69

347.8

Suspended sediment

Mean 

concentration 

(ppm)

57,200 

34,800 

19,000 

6,650 

430

240 

210 

130 

85 

44

17

22

80 

24,400 

38,600

Tons 

per 

day

4,000 

1,660 

667 

180 

10

4.9 

3.3 

1.7 

al.O 

.5

.2

.2

1.2 

813,300 

s 8,480

28,313.0

Total discharge for year (cfs-days) ........................................................... 7,014.0

Total load for year (tons) ..................................................................... 1.522,269.2

s Computed by subdividing day. 

a Estimated or interpolated.
LITTLE COLORADO RIVER BASIN 

LITTLE COLORADO RIVER AT WOODRUFF, ARIZ.

LOCATION. At gaging station at county bridge in Woodruff, Navajo County, 3j miles downstream from 

DRAINAGE AREA. 8,100 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: June 1950 to September 1951.

Water temperatures: June 1950 to September 1951.

Sediment records: June 1950 to September 1951. 

EXTREMES, 1950-51.--Dissolved solids: Maximum, 546 ppm Aug. 20; minimum, 283 ppm July 11-17.

Hardness: Maximum, 218 ppm Feb. 11-20 and May 1-10; minimum, 60 ppm Aug. 20.

Specific conductance: Maximum daily, 890 micromhos Aug. 7; minimum daily, 318 micromhos Aug. 1.

Water temperatures: Maximum observed, 82°F July 17, and Aug. 13, minimum observed, 33°F Dec. 31.

Sediment concentrations: Maximum daily, 66,400 ppm Aug. 4; minimum daily, no flow on many days.

Sediment loads: ; Maximum daily, 409,000 tons Aug. 28; minimum daily. 0 tons on many days. 

EXTREMES, June 1950 to September 1951. Dissolved solids: Maximum, 838 ppm July 11-12, 1950; mini

Hardness: Maximum, 218 ppm Feb. 11-20, and May 1-10; minimum, 60 ppm Aug. 20, 1951.

Specific conductance: Maximum daily, 2,110 micromhos July 11, 1950; minimum daily, 318 micromhos 

Water temperatures: Maximum observed, 82°F July 17 and Aug. 13, 1951, minimum observed, 33°F Dec

Sediment concentrations: Maximum daily, 66,400 ppm Aug. 4, 1951; minimum daily, no flow on many 

Sediment loads: Maximum daily, 409,000 tons Aug. 28, 1951; minimum daily, 0 tons on many days.

REMARKS. Records of specific conductance available in district office at Albuquerque, N. Mex. Val

are =,.-<* Of determined constituents. Records of discharge for water year October 1950 to Septem

Chemical analyses, in parts per million, water year October 1950 to 

Date of collection

Oct. 1-10, 1950..... 

Oct. 11-14, 17-20...

Dec. 11, 13-20 ..... 

Dec. 21-31 .........

Jan. 1-10, 1951.....

Jan. 21-22, 24-31 ...

Mar. 21-31 ........

Mean 

discharge 

(cfs)

1.04 

1.06 

1.05 

1.16 

5 93 

?! 21

6.20 

5.67 

4.11 

6.31 

5.93 

5.42

6.76 

6.53 

6.16 

5.42 

4.99 

5.46

Silica 

(Si02)

16 

16 

16 

16 

20 

17

17 

17 

18 

18 

18 

17

15 

20 

20 

20 

19 

19

Iron

(Fe)

0.01 

.02 

.01 

.02 

.02 

.01

.01 

.01 

.01 

.01 

.02 

.01

.02 

.01 

0 

.01 

.01 

.01

Calcium 

(Ca)

44 

48 

47 

46 

49 

49

48 

48 

48 

49 

49 

46

46 

48 

48 

48 

49 

47

Magnesium 

(Mg)

14 

19 

20 

21 

21 

22

22 

22 

22 

23 

23 

21

22 

24 

22 

22 

22 

23

Sodium 

(Na)

31 

28 

28 

27 

26 

24

24 

26 

25 

27 

25 

25

29 

28 

27 

26 

29 

28

Potassium 

(K)

9.0 

8.0 

7.8 

7.0 

8.4 

7.8

8.2 

8.8 

5.6 

5.0 

5.0 

6.0

4.6 

4.0 

3.7 

3.4 

3.5 

3.4

Bicarbonate 

(HCO,)

181 

199 

198 

198 

211 

214

199 

218 

208 

231 

215 

195

218 

200 

210 

194 

210 

216

Carbonate 

(CO,)

5 

5

7

6 

6

8 

6

Sulfate 

(SO,)

62 

67 

69 

68 

63 

58

63 

62 

64 

61 

57 

62

62 

65 

64 

65 

69 

65

Chloride 

(Cl)

20 

22 

22 

22 

21 

19

20 

21 

21 

20 

19 

20

20 

24 

22 

23 

23 

22

Fluoride 

(F)

0.3 

.4 

.4 

.3 

.1 

.1

.1 

.2 

.3 

.3 

.2 

.3

.3 

.2 

.2 

.2 

.2 

.2

Nitrate

(NO.)

0.8 

.8 

.6 

.6 

.3 

.3

.8 

.5 

.5 

.4 

.5 

.3

.5 

.9 

.5 

.6 

.6 

.8
LITTLE COLORADO RIVER BASIN--Continued

LITTLE COLORADO RIVER AT WOODRUFF, ARIZ.--Conti

Chemical analyses, in parts per million, water year October 1950 to Septem

Date of collection

Apr. 1-10, 1951 ....

June 21-30 a .......

Aug. 1-3, 5-6,8-10 . .

Aug. 21-26, Sept. 1 .

Sept. 21-24, 26-30... 

Weighted average . .

Mean 

discharge 

(cfs)

2.90 

.45 

.20 

.32 

1.41 

.16

.01 

16.5 

47.9 

14.0

93.5 

218 

.28 

34 

667 

13.3 

4.36 

2.42

30.2

Silica 

(SiO,)

20 

19 

18 

18 

17 

18

16 

13 

11 

12 

13 

18 

19

18 

22 

17 

21 

15 

18 

22 

18

16

Iron 

(Fe)

0 

0 

0 

0 

0 

.02

.03 

.02 

.02 

.01 

.03 

.03 

.07

.07 

.14 

.02 

.10 

.05 

.02 

.01 

.02

0.05

Calcium 

(Ca)

48 

46 

45 

46 

45 

40

39 

33 

28 

26 

30 

50 

60

42 

28 

29 

20 

24 

46 

53 

50

29

Magslum 

(Mg)

22 

24 

23 

25 

25 

26

27 

25 

24 

22 

18 

9.0 

9. 2

8. 2 

6.1 

7.3 

2.6 

5.8 

14 

19 

20

7.8

Sodium 

(Na)

30 

32 

35 

37 

35 

34

41 

45 

50 

44 

36 

41 

83

44 

153 

66 

1 

66 

33 

20 

27

63

Potassium 

(K)

.3 

.8 

.3 

.0 

.5 

.6

.8 

.5 

5.3 

7.2 

7.6 

7.8 

10

6.8

7.8 

80 

4.2 

5.0 

5.8 

5.0

5.2

Bicarbonate 

(HCO,)

216 

205 

198 

205 

209 

214

209 

161 

137 

100 

121 

152 

224

188 

244 

145 

295 

159 

202 

198 

193

170

Carbonate 

(C03)

6

7 

12 

13

-

Sulfate 

(S04)

64 

75 

78 

85 

79 

74

88 

104 

115 

113 

92 

95 

150

57 

110 

79 

110 

66 

46 

55 

61

69

Chloride 

(Cl)

22 

28 

27 

30 

28 

24

30 

34 

39 

35 

26 

23 

30

22 

80 

34 

67 

24 

16 

18 

20

26

Fluoride 

(F)

0.3 

.5 

.4 

.4 

.4 

.5

.5 

.5 

.5 

.4 

.2 

.4 

.6

.6 

.8 

.6

.6 

.2 

0 

.2

0.6

Nitrate 

(NO,)

0.5 

1.2 

1.0 

1.2 

.9 

.8

.7 

.9 

.7 

.4 

.4 

1.0 

1.1

1.7 

.6 

1.8 

.8 

1.5 

1.1 

.6 

.9

1.4

B

r

(B

0.1 

.1 

.1 

.1 

.1 

.1

.1 

.1 

.1 

.1 

.1 

.1 

.2

.

.

.2

.

.

.

-

a Flow less than 0.05 cfs Apr. 18, 19, May 26 -June 31, July 2-13.
LITTLE COLORADO RIVER BASIN 149

LITTLE COLORADO RIVER BASIN Continued 

LITTLE COLORADO RIVER AT WOODRUFF, ARIZ. Continued

Temperature (°F) of water, water year October 1950 to September 1951 

/Once daily temperature measurement usually between 3 p. m. and 7 p. m. 7

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

Average

Oct.

a 58

a 49

a 52

a 59

a 55

a 55

a 53

a 52

a 54

a 53

a 53

a 52

a 54

a 53

a 55

a 52

a 55

a 54

a 52

a 51

a 52

a 53

a 52

a 52

a 52

a 50

a 50

a 48

a 46

a 49

a 59

53

Nov.

59

60

56

55

56

54

54

55

47

43

44

45

45

44

48

49

50

49

54

56

54

54

51

49

50

50

48

46

45

46

--

51

Dec.

45

42

42

45

43

40

42

48

48

48

45

47

45

44

46

46

44

42

43

42

40

39

38

39

38

38

39

39

39

38

33

42

Jan.

37

35

38

40

40

38

38

37

a35

--

35

36

37

38

39

38

39

42

43

45

45

42

45

46

46

46

45

47

44

39

39

40

Feb.

37

35

36

36

42

47

49

51

55

55

52

49

45

45

45

45

48

44

45

47

44

49

45

44

45

48

42

47

..

--

45

Mar.

42

41

39

44

48

48

51

49

50

52

49

50

52

54

55

52

49

46

50

55

67

57

56

56

56

50

50

50

54

49

49

50

Apr.

56

57

56

50

50

51

56

50

60

50

58

56

64

62

64

64

59

..

59

64

69

64

62

56

61

66

47

47

45

--

58

May

50

66

70

69

67

60

63

61

72

75

65

72

55

52

51

55

66

70

72

70.

65

71

72

76

81

..

__

_.

__

__

--

66

June July

76

_-

_

--

--

_

_

_.

77

74

76

82

-_

72

74

74

74

76

71

79

79

74

78

75

76

Aug.

73

73

71

73

72

72

_.

71

75

75

78

79

82

78

79

73

79

76

72

71

71

71

71

74

75

71

65

61

61

70

70

73

Sept.

70

71

72

72

74

71

b79

73

75

75

70

69

69

71

72

70

72

69

75

68

68

66

66

66

66

a 64

68

64

63

68

--

70

a Reading obtained between 6 a. m and 10 a. m. 

b Reading obtained between 10 a. m. and 3 p. m.
150 COLORADO RIVER BASIN

LITTLE COLORADO RIVER BASIN Continued 

LITTLE COLORADO RIVER AT WOODRUFF, ARIZ. Continued 

Suspended sediment, water year October 1950 to September 1951

Day

Q

21

23

25

9ft

97

29

31 

Total8

13

1ft

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

October

Mean

charge

(cfs)

0.9 

.6 

.8 

.9 

1.1

1.5 

1.4 

1.2 

1.0 

1.0 

1.0 

1.0 

1.2 

1.4 

1.0

1.0 

.8 

1.0 

1.0 

1.2

1.2 

1.4 

1.2 

1.0 

1.0

.8 

.8 

.8 

1.0 

1.2 

1.2

32.6

Suspended sediment

Mean 

concentration 

(ppm)

75 

78 

59 

66 

73

102 

112 

101 

83 

68 

52 

67 

105 

78 

73

68 

70 

66 

63 

63

62 

86 

94 

72 

59 

73 

24 

66 

58 

76 

76

..

Tons 

per 

day

0.2 

.1 

.1 

.2 

.2

.4 

.4 

.3 

.2 

a. 2

.1 

.2 

.3 

.3 

.2

.2 

.2 

.2 

.2 

a. 2

.2 

.3 

.3 

.2 

.2

.2 

.1 

.1 

.2 

a. 2 

.2

6.6

January

5.6 

6.6 

5.1 

6.1 

7.2

6.6 

6.6 

6.1 

6.6 

6.6

5.6 

6.1 

7.2 

6.3 

6.1

5.1 

5.6 

5.6 

6.1 

5.6

5.6 

5.6 

5.6 

5.6 

5.1

5.1 

5.1 

5.1 

5.6 

5.6 

5.6

182.0

52 

39 

32 

28 

32

46 

46 

38 

46 

44

41 

44 

45 

52 

25

75 

37 

40 

85 

71

58 

64 

56 

58 

62 

60 

80 

102 

118 

128 

53

--

0.8 

.7 

.4 

.5 

.6

.8 

.8 

.6 

.8 

a. 8

.6 

.7 

.9 

.9 

.4

1.0 

.6 

.6 

1.4 

al.l

.9 

1.0 

.8 

.9 

.9

.8 

1.1 

1.4 

1.8 

1.9 

.8

27.3

November

Mean

charge

(cfs)

1.0 

1.0 

.8 

.8 

.8

.8 

1.4 

2.0 

1.8 

1.2 

1.2 

1.6 

2.4 

6.6 

5.1

5.1 

5.1 

7.2 

14 

11

7.8 

7.2 

7.2 

8.5 

7.8

7.2 

6.6 

6.6 

6.6 

6.6

143.0

Suspended sediment

Mean 

concentration 

(ppm)

51 

46 

78 

59 

54

>5 

11 

74 

92 

61

61 

60 

81 

336

107

90 

99 

92 

163 

142

120 

112 

101 

90 

205

87 

76 

66 

74 

124

--

Tons 

per 

day

0.1 

.1 

.2 

.1 

.1

.1 

.3 

.4 

.4 

a. 2

.2 

.3

.5 

6.0 

1.5

1.2 

1.4 

1.8 

6.2 

a4.2

2.5 

2.2 

2.0 

2.1 

4.3

1.7 

1.4 

1.2 

1.3 

a2. 2

46.2

February

6 

6 

6 

6

7

7.2 

7.2 

6.6 

7.8 

7.8

7.2 

6.6 

5.6 

6.1 

6.1

6.1 

6.6 

7.2 

7.2 

6.6

6.6 

6.6 

6.1 

6.1 

6.6 

6.1 

5.6 

5.6

182.2

28 

49 

32 

27 

24

48 

68 

94 

107 

115

119 

135 

137 

97 

53

67 

67 

110 

90 

56

79 

142 

178 

131 

130

116 

194 

135

0.5 

.8 

.5 

.4 

.5

.9 

1.3 

1,7 

2.3 

2.4

2.3 

2.4 

2.1 

1.6 

.9

1.1 

1.2 

2.1 

1.7 

1.0

1.4 

2.5 

2.9 

2.2 

2.3

1.9 

2.9 

2.0

45.8

December

Mean

charge

(cfs)

6.6 

6.6 

6.6 

6.1 

6.1

6.1 

6.1 

6.1 

6.1 

5.6 

5.6 

6.1 

6.6 

6.1 

6.1

5.6 

5.6 

5.6 

5.1 

4.3

4.3 

4.0 

4.0 

3 3 

3! 6

3.6 

4.7 

4.3 

4.0 

4.7 

4.7

163.9

Suspended sediment

Mean 

concentration 

(ppm)

174 

105 

65 

55 

68

64 

46 

50 

61 

69

78 

61 

58 

73 

98

59 

78 

59 

45 

38

32 

42 

33 

35 

26

42 

40 

41 

43 

70 

98

Tons 

per 

day

3.1 

1.9 

1.2 

.9 

1.1

1.1 

.8 

.8 

1.0 

a 1.0

1.2 

1.0 

1.0 

1.2 

1.6

.9 

1.2 

.9 

.6 

a. 4

.4 

.4 

.4 

.3 

.3

.4 

.5 

.5 

.5 

a. 9 1.2

28.7

March

5.6 

6.1 

6.1 

6.1 

5.6

5.1 

4.7 

4.7 

5.1 

5.1

4.7 

4.7 

4.7 

5.1 

5.1

5.6 

5.1 

4.7 

5.1 

5.1

5.6 

4.7 

4.7 

5.1 

5.1

5.6 

7.2 

6.6 

6.1 

5.1 

4.3

164.2

94 

158 

60 

49 

67

92 

116 

116 

144 

177

160 

107 

68 

91 

135

188 

171 

154 

114 

95

133 

130 

130 

130 

130

170 

185 

179 

203 

265 

234

1.4 

2.6 

1.0 

.8 

1.0

1.3 

1.5 

1.5 

2.0 

2.4

2.0 

1.4 

.9 

1.3 

1.9

2.8 

2.4 

2.0 

1.6 

1.3

2.0 

a 1.6 

al.6 

al.8 

1.8

2.6 

3.6 

3.2 

3.4 

3.6 

2.7

61.0

a Computed from estimated concentration graph.
LITTLE COLORADO RIVEK BASIN 151

LITTLE COLORADO RIVER BASIN Continued 

LITTLE COLORADO RIVER AT WOODRUFF, ARIZ. Continued 

Suspended sediment, water year October 1950 to September 1951 Continued

Day

1 fl

19

91

99

23

9ft

9Q

31 

Total8 

9 

11 

12 

13 

14 

20 

21 

22 

23-- 

24 

25 

26 

27 

28 

29 

30 

31 

Total

April

Mean

discharge

(cfs)

6.6 

6.1 

4.7 

2.2 

1.8

1.8 

1.8 

1.6 

1.4 

1.0

.8 

.7 

.8 

.6 

.6 

.5 

.1 

0 

0 

.4

.4 

.2 

.2 

.1 

.1

.2 

.2 

.2 

.2 

.2

35.5

Suspended sediment

Mean 

concentration 

(ppm)

187 

206 

205 

196 

142

104 

105 

106 

95 

120

96 

71 

59 

71 

142 

119 

94

165

54 

55 

102 

109 

81

93 

76 

95 

142 

80

Tons 

per 

day

3.3 

3.4 

2.6 

1.2 

.7

.5 

.5 

.5 

.4 

.3

.2 

.1 

.1 

.5 

.2 

.2 

(t) 

0 

0 

.2

.1 

(t) 

.1 

(t) 

(t) 

.1 

(t) 

.1 

.1 

(t)

15.0

July

0.1 

0 

0 

0 

0

0 

0 

0 

0 

0

0 

0 

0 

.1 

.7 

100 

15 

175 

131 

170 

26 

14 

2 

1 

.4

.3 

.6 

6.1 

14 

21 

7.0

684.3

116

125 

103 

10, 800 

2,590 

29,000 

26,500 a 

24,800 

7,700 

5,200 

595 

452 

288

180 

10 

5,200 

27,000 

31,400 

7,900

(t) 

0 

0 

0 

0

0 

0 

0 

0 

0

0 

0 

0

(t)

s6 

s3,430 

s!08 

817,500 

islO,600 

s!5,000 

541 

197 

3.2 

1.2 

.3

.1 

.3 

s359 

1,020 

si, 900 

149

50,815.1

May

Mean

charge

(cfs)

0.2 

.3 

.3 

.3 

.3

.4 

.4 

.3 

.3 

.4

.3 

.3 

.4 

.5 

.6 

.8 

1.0 

1.6 

5.6 

3.0

1.0 

.4 

.2 

.1 

.1

0 

0 

0 

0 

0 

0

19.1

Suspended sediment

Mean 

concentration 

(ppm)

77 

36 

51 

77 

85

117 

116 

120 

77 

69

124 

186 

107 

83 

79 

83 

85 

174 

166 

182

164 

121 

69 

80 

54

Tons 

per 

day

W

(t) 

(t) 

0.1 

.1

.1 

.1 

.1 

.1 

.1

.1 

.2 

.1 

.1 

.1 

.2 

.2 

.8 

2.5 

1.5

.4 

.1 

(t) 

(t) 

(t) 

0 

0 

0 

0 

0 

0

7.2

August

6.2 

257 

289 

415 

124

55 

20 

12 

3.4 

1.3

.6 

.6 

.2 

.2 

.1 

.2 

.2 

.2 

.2 

34 

19 

3.7 

16 

14 

13

5.6 

4.6 

4,740 

2,820 

200 

100

9,155.3

2,970 

23,900 

39,800 

66,400 

33,900

23,000 

7,800 

3,000 

1,100 

500

227 

175 

115 

117 

134 

246 

247 

216 

244 

32,500 

9,700 

1,000 

18,400 

15,000 

11,600

4,000 

1,640 

31,300 

36,800 

21,000 

7,200

--

s!90 

823,700 

31,100 

s86,400 

S12.900

3,420 

a421 

97 

10 

1.8

.4 

.3 

.1 

.1 

(t) 

.1 

.1 

.1 

.1 

S6.070 

498 

10 

si, 090 

567 

s519

60 

s69 

409,000 

294,000 

11,300 

1,940

883,364.1

June

Mean

charge

(cfs)

0

Suspended sediment

Mean 

concentration 

(ppm)

Tons 

per

day

0

September

65 

37 

23 

14 

12

8.6 

7.2 

6.5 

5.8 

5.2

5.2 

3.5 

3.0 

7.9 

6. 5

3.5 

3.0 

4.0 

4.0 

3.0 

2.5 

2.2 

1.8 

1.8 

1.8

1.8 

1.8 

1.8 

3.5 

5.2

252.1

1,100 

450 

410 

190 

70

57 

48 

35

39

30

31

106 

22

193 

45 

25 

7.2 

2.3

1.3 

.9 

.6

.6

.3

.2

1.0 

.3

284.1

Total discharge for year (cfs-days) 

Total load for year (tons).......... 11,014.2

934,701.1

s Computed by subdividing day.

t Less than 0. 05 ton.

a Computed from estimated concentration graph.
LITTLE COLORADO RIVER BASIN Continued 

LITTLE COLORADO RIVER AT WOODRUFF, ARIZ. Contin

Particle-size analyses of suspended sediment, November 1950 to A

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Nov. 20, 1950 ...........

Apr. 2 .................

July 16. ................

Aug. 29 ................

Aug. 29 ................

Aug. 31 ................

Time

4:00 p. m. 

2:15 p.m. 

3:00 p.m. 

9:15 a.m. 

10:15 a.m. 

8:00 p. m. 

10:55 a. m.

10:00 a. m. 

2:40 p.m. 

6:30 p. m. 

8:30 a. m. 

2:00 p. m. 

6:30 a. m. 

6:30 p. m. 

2:50 p. m.

6:00 p. m. 

6:30 a.m. 

11:00 a.m. 

3:00 p. m. 

6:00 p. m. 

11:00 a.m. 

6:30 p.m.

Water 

discharge 

(cfs)

12 

6.1 

5.6 

6.1 

.5 

28 

313

850 

138 

53 

300 

127 

850 

127 

7,000

7,600 

4,230. 

1,850 

1,030 

682 

159 

60

Suspended sedim

Concentration 

of sample 

(ppm)

194 

183 

101 

192 

120 

7,000 

38, 600

33,600 

32, 100 

36, 200 

32, 800 

30, 300 

71,300 

50,000 

30,000

30,000 

41,900 

43, 600 

38, 300 

34,700 

20,600 

 6,940

Concentration 

of suspension 

analyzed 

(ppm)

563 

1,490 

693 

1,748 

1,320 

2,560 

3,940

3,100 

4,550 

3,560 

2,750 

2,720 

2,770 

2,330 

2,510

2,270 

3,500 

2,720 

3,230 

2,740 

3,610 

2,260

Percent finer 

0.002

72 

43 

54 

77 

59

50

0.004

82 

56 

66 

95 

70 

74 

68

65 

64 

75 

65 

60 

53 

73 

49

72 

70 

60 

73 

72 

88 

94

0.008

100 

82 

95 

99 

97

85

0.016

87 

95 

100 

100 

82 

89

85 

88 

93 

93 

99 

80 

98 

80

87 

72 

78 

78 

75 

93 

96

0.0
LITTLE COLORADO RIVER BASIN--Continued 

LITTLE COLORADO RIVER AT CAMERON, ARIZ.

LOCATION. At bridge on U. S. Highway 89 at Cameron, Coconino County, 12 miles upstream from gaging s

DRAINAGE AREA. 26,500 square miles, approximately (above gaging station).

RECORDS AVAILABLE. Chemical analyses: October 1950 to September 1951.

REMARKS.--Records of specific conductance of daily samples available in district office at Albuquerqu

sums of determined constituents. Records for station near Cameron (below Moenkopi Wash) for water 

Supply taper 1213. No appreciable inflow between sampling site and gaging station except during p

small arroyos.

Chemical analyses, In parts per million, water year October 1950 to Se

Date of collection

Apr. 6-10, 1951 a..

Aug. 1, 8-10, 30

Sept. 1-4, 7-11 a . .

Mean 

discharge 

(cfs)

8.34 

17.9 

29.2 

24

28.5 

335 

457 

776 

394 

3,412

757

Silica 

(Si02)

21 

21 

20

23 

21 

25 

20 

18

15

Iron 

(Fe)

0.03 

.02 

.03 

.04

.06 

.17 

.03 

.05 

.16 

.16

.04

Calcium 

(Ca)

37 

32 

40 

28

22

7.5 

52 

54 

272 

25

26

Magnesium 

(Mg)

9.0 

7.6 

9.6 

6.1

7.4 

4.4 

11 

11 

61 

3.7

5.5

Sodium 

(Na)

179 

151 

218

1 

127 

164 

236 

150 

106

94

Potassium 

(K)

7.2 

8.0 

9.2 

98

10 

8.0 

8.8 

6.4 

11 

7.2

3.6

Bicarbonate 

(HCO,)

166 

148 

223 

172

286 

240 

176 

320 

318 

1-88

172

Carbonate 

(CO,)

6

13

7

14

Sulfate 

(SO,)

63 

60 

131 

36

75 

63 

245 

209 

897 

75

47

Chloride 

(Cl)

230 

180 

210 

89

50 

28 

85 

159 

45 

45

71

Fluoride 

(F)

0.5 

.6 

.6 

.6

2.0 

1.4 

1.0 

.8 

.3 

1.2

.5

Nitrate 

(NOS )

2.1 

2.4 

1.7 

1.8

.8 

1.9 

1.4 

1.4 

1.2 

1.8

2.4

B

r

(

0

a No flow at sampling site Oct. 1-Apr. 5; no flow at sampling site or gaging station Apr. 13, May 7-8, May 23-July 18, Sept. 15
COLORADO RIVER MAIN STEM--Continued 

COLORADO RIVER NEAR GRAND CANYON, ARIZ.

Location.--At gaging station at Kaibab Bridge, a quarter of a mile upstream from Bright Angel Creek, 11 

nino County, 26 miles downstream from Little Colorado River, and 267 miles upstream from Hoover Dam. 

DRAINAGE AREA. 137,800 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: August 1925 to November 1942, September 1943 to September 1951.

Water temperatures: October 1936 to October 1942, September 1943 to September 1951.

Sediment records: October 1925 to November 1942, September 1943 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 1,320 ppm Nov. 1-10; minimum, 348 ppm June 1-10.

Hardness: Maximum, 668 ppm Aug. 11; minimum 196 ppm July 7-10.

Specific conductance: Maximum daily, 1,920 micromhos Oct. 2; minimum daily, 470 micromhos June 25.

Water temperatures: Maximum observed, 82°F July 27, 30-31, Aug. 1-2; minimum observed, 36°F Jan. 9-10

Sediment concentrations: Maximum daily, 61,800 ppm Aug. 31; minimum daily, 131 ppm Nov. 2.

Sediment loads: Maximum daily, 3,460,000 tons Aug. 31; minimum daily, 1,590 tons Jan. 17. 

EXTREMES, 1925-51.--Dissolved solids: Maximum, 1,890 ppm Sept. 21-30, 1934; minimum, 225 ppm June 11-20

Hardness: Maximum, 792 ppm Sept. 1-10, 1940; minimum, 127 ppm June 11-17, 1926.

Specific conductance (1937-51): Maximum daily, 2,900 micromhos Sept. 6, 1940; minimum daily, 341 micr

Water temperatures (1936-51): Maximum observed, 88°F on July 17, 1944; minimum, freezing point on sev

Sediment concentrations: Maximum daily, 138,000 ppm Sept. 13, 1927; minimum daily, 100 ppm on many day

Sediment loads: Maximum daily 27,600,000 tons Sept. 13, 1927; minimum daily, 497 tons July 22, 1934.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conductan

Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given in Wa

Chemical analyses in i

Date of collection

Oct. 11-20... ........

Nov. 21-30.. .........

Dec. 21-31..... ......

Jan. 11-20......... ..

Jan. 21-31 ...........

£ eb. 1-10 ...........

Feb. 21-2b.. .........

Mar. 11-20... ........

Mar. 21-27. ..........

Mean 

discharge 

(cfs)

6,764 

5,686 

5,143 

5,057 

5,812 

7,037

7,438 

6,794 

6,969 

5,633 

4,526 

5,724

5,181 

7,289 

7,495 

7,369 

6,951 

6.760

Silica 

(Si02)

15 

13 

11 

9.6 

10 

12

13 

13 

14 

13 

14 

14

14 

14 

12 

13 

11 

10

Iron 

(Fe)

0.05 

.09 

.06 

.04 

.05 

.06

.06 

.04 

.04 

.04 

.04 

.02

.02 

.02 

.03 

.03 

. 11 

.10

Calcium 

(Ca)

151 

128 

128 

12b 

13i 

130

117 

118 

115 

112 

125 

126

116 

115 

102 

97 

108 

103

Magnesium 

(Mg)

51 

50 

55 

59 

59 

55

49 

49 

,9 

47 

54 

54

49 

47 

43 

42 

42 

42

Sodium 

(Na)

185 

169 

182 

195 

200 

183

159 

165 

168 

166 

202 

201

174 

171 

155 

157 

157 

161

Potassium 

(K)

6.0 

5.2 

4.4 

5.6 

5.2 

5.6

3.6 

15 

li 

15 

9.2 

10

8.8 

7.6 

8.4 

8.0 

19 

16

jarts per million, water year October 1950 to Septe

Bicarbonate 

(HCO,)

276 

256 

246 

244 

262 

256

253 

261 

259 

254 

262 

269

258 

247 

230 

221 

260 

256

Sulfate 

(S0<)

519 

483 

502 

546 

528 

499

449 

429 

410 

395 

451 

454

395 

403 

371 

372 

367 

360

Chloride 

(Cl)

145 

140 

170 

i62 

180 

162

122

148 

153 

154 

198 

194

176 

162 

138 

138 

155 

155

Fluoi 

ride 

(F)

0.4 

.5 

.5 

.3 

.4 

.4

.4 

.3 

.3 

.3

.4 

.4

.4 

.4 

.4 

.4 

.3 

.3

Nitrate 

(NO,)

2.0 

2.9 

3.6 

4.3 

4.0 

4.6

4.1 

4.0 

4.0 

4.3 

5.3 

5.4

4.4 

4.5 

4.1 

3.2 

2.4 

4.0

Boron 

(B)

Pa

p

m

lio

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1
Apr. il-13, 17-19.. .

May 11-20 ..........

June 11-20.... ......

June 21-30..........

July 21-31 ..........

Aug. 1-3, 6-10..... .

Aug. 13-20..........

Sept. 1-10 ..........

Sept. 11-20 .........

Sept. 21-30 .........

Weighted average. . .

8,507

22, 440

36,740

a 15 900

8 569

a 19 '400

4,854

c 13, 270

14 

14

12

11

14

.13

.29

.22

34

.04

0. 18

95

96

124

88

37

00

46

29

139

nc

146

172

91

10

5 

A

6.8

7.0

248

onft

004

211

239

244

221

319

194

90

103

110

on^

324

299

496

374

431

241

122

 *A

25

23

161

77

.5

0

o

.4

0.4

1.7

2 9

2 5

1 9'

2 5

2 3

4.5

2.2

1

a Not included for computation of weighted averages.

b Determination by Schwar^enbach method.

c Represents 93 percent of the runoff for the water year October 1950 to September 1951.
156 COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM--Continued

COLORADO RIVER NEAR GRAND CANYON, ARIZ. Continued

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

67

62

62

_

62

62

64

63

64

65

64

65

65

65

65

65

65

65

65

65

65

65

63

63

63

62

62

62

62

61

61

64

Nov.

60

60

-_

_.

"

57

57

56

57

50

50

49

48

48

46

46

46

48

49

48

48

49

50

49

50

49

47

46

46

45

--

50

Dec.

46

45

45

._

--

..

45

45

45

45

44

44

43

43

44

43

44

43

42

42

41

41

41

41

40

38

38

38

38

38

39

42

Jan.

38

37

38

..

--

39

38

37

36

36

37

37

36

36

37

37

38

38

39

39

39

39

40

40

40

40

41

43

44

42

41

39

Feb.

39

38

_

38

36

40

39

40

42

44

44

45

44

43

42

41

42

43

41

--

..

44

44

44

45

45

44

43

_

_

--

42

Mar.

44

_

_.

_

44

45

46

46

48

51

50

48

48

49

50

51

51

49

48

49

50

51

52

52

55

54

53

52

51

53

52

50

Apr.

53

54

54

_

56

51

58

60

59

58

59

59

58

__

--

..

63

62

62

"

62

62

63

62

63

60

63

60

_

58

--

59

May

57

53

..

..

63

61

6364'

66

63

64

64

__

61

62

61

64

64

66

66

..

66

68

68

70

70

68

71

69

68

65

June

67

67

65

65

65

69

65

66

67

--

68

69

69

70

72

73

75

75

76

75

74

71

74

74

74

74

74

73

74

74

--

71

July

*

..

--

_

79

75

76

77

76

76

77

78

79

79

78

78

79

79

81

81

._

81

79

81

82

80

81

82

82

--

Aug.

82

82

81

_

80

78

78

79

79

77

78

79

79

79

79

78

78

78

78

77

77

-

75

75

_

72

69

70

77

Sept.

73

73

75

75

--

75

74

75

75

74

72

71

70

75

72

71

71

71

--

_

71

72

71

71

70

71

70

70

--

72
COLORADO RIVER MAIN STEM 157

COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER NEAR GRAND CANYON, ARIZ. Continued 

Suspended sediment, water year October 1950 to September 1951

Day

2

13

1 Q

23

24

25

oo

TotalQ

10- 

12

Ifl

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

October

Mean

charge

(cfs)

7,660 

7,380 

7,280 

7,100 

6,890

6,590 

6,260 

6,040 

6,200 

6,240

6,160 

6,040 

5,970 

5,870 

5,730

5,650 

5,510 

5,280 

5,260 

5,390

5,270 

5,100 

5,100 

5,230 

5,300

5,180 

5,210 

5,100 

5,020 

5,010 

5,050

181,070

Suspended sediment

Mean 

concentration 

(ppm)

4,050 

4,500 

2,550 

2,200 

1,700

1,270 

984 

880 

803 

769

683 

767 

614 

634 

540 

488 

520 

418 

402 

384

327 

318 

314 

256 

262

238 

316 

189 

139 

134 

144

--

Tons 

per 

day

83,800 

89,700 

50, 100 

a 42, 200 

31,600

22,600 

16,600 

14, 400 

13,400 

13,000

11,400 

12, 500 

9,900 

10,000 

8,350 

7,440 

7,740 

5,960 

5,710 

5,590

4,650 

4,380 

4,320 

3,620 

3,750

3,330 

4,440 

2,600 

1,880 

1,810 

1,960

498,730

January

5,940 

5,830 

5,730 

5,730 

5,820

5,650 

5,470 

5,470 

5,470 

5,220

4,910 

4,810 

4,580 

4,150 

3,870 

3,850 

4,390 

4,780 

4,950 

4,970

4,780 

4,790 

5,050 

5,490 

5,820

5,970 

5,900 

5,950 

6,160 

6,470 

6,580

164,550

212 

194 

211 

190 

170

147 

161 

248 

206 

176 

184 

136 

301 

229 

186 

156 

134 

152 

162 

166

162 

163 

161 

170 

219

280 

369 

265 

234 

243 

265

-

3,400 

3,050 

3,260 

a 2, 940 

a2,670

2,240 

2,380 

3,660 

3,040 

2,480

2,440 

1,770 

3,720 

2,570 

1,940 

1,620 

1,590 

1,960 

2,170 

2,230

2,090 

2,110 

2,200 

2,520 

3,440

4,510 

5,880 

4,260 

3,890 

4,240 

4,710

90,980

November

Mean

charge

(cfs)

5,050 

4,870 

4,750 

4,830 

5,100

5,160 

5,120 

5,190 

5,220 

5,280

5,380 

5,530 

5,730 

5,650 

5,640

5,740 

5,910 

6,120 

6,210 

6,210

6,190 

6,450 

6,700 

6,680 

6,690

7,050 

7,420 

7,540 

7,680 

7,970

179,060

Suspended sediment

Mean 

concentration 

(ppm)

158 

131 

135 

140 

145

149 

185 

225 

231 

214

226 

236 

281 

274 

318 

288 

282 

271 

310 

326

299 

296 

303 

369 

346

420 

411 

446 

531 

666

Tons 

per 

day

2,150 

1,720 

al,730 

al,820 

a 2, 000

2,080 

2,560 

3,150 

3,260 

3,050

3,280 

3,520 

4,350 

4,180 

4,840

4,460 

4,500 

4,480 

5,200 

5,470

5,000 

5,150 

5,480 

6,660 

6,250

7,990 

8,230 

9,080 

11,000 

14,300

146,940

February

6,720 

6,930 

6,750 

6,060 

4,970

3,930 

3,420 

3,590 

4,170 

5,270

6,370 

7,280 

7,490 

7,030 

7,100 

7,480 

7,600 

7,580 

7,540 

7,420

7,280 

7,210 

7,360 

7,760 

7,840

7,730 

7,400 

7,380

184,660

352 

346 

347 

348 

393

319 

265 

198 

184 

189

272 

332 

407 

530 

480 

538 

589 

527 

483 

440

400 

361

354 

445 

457

480 

434 

412

-

6,390 

6,470 

a 6, 320 

5,690 

5,270

3,380 

2,450 

1,920 

2,070 

2,690

4,680 

6,530 

8,230 

10, 100 

9,200 

10, 900 

12, 100 

10, 800 

9,830 

a8,810

a7,860 

7,030 

7,030 

9,320 

9,670

10,000 

8,670 

8,210

201,620

December

Mean

charge

(cfs)

7,9iO 

7,660 

7,660 

7,580 

7,320

7,300 

7,360 

7,320 

7,170 

7,100

6,910 

6,860 

6,760 

6,580 

6,610

6,910 

7,010 

6,890 

6,730 

6,680

6,940 

7,360 

7,680 

7,700 

7,310

7,050 

6,940 

6,830 

6,560 

6,260 

6,030

218,980

Suspended sediment

Mean 

concentration 

(ppm)

1,240 

695 

639 

575 

515

450 

390 

326 

349 

324

323 

328 

351 

367 

323

340 

492 

396 

351 

341

314 

304 

344 

369 

342

318 

279 

277 

247 

228 

238

-

Tons 

per 

day

26,500 

14,400 

13,200 

a 11, 800 

a 10, 200

a 8, 870 

7,750 

6,440 

6,760 

6,210

6,030 

6,080 

6,410 

6,520 

5,760

6,340 

9,310 

7,370 

6,380 

6,150

5,880 

6,040 

7,130 

7,670 

6,750

6,050 

5,230 

5,110 

4,370 

3,850 

3.870

240, 430

March

7,600 

7,600 

7,540 

7,610 

7,580

7,300 

7,150 

7,280 

7,100 

6,930

6,820 

6,580 

6,340 

6,650 

6,840 

6,970 

7,140 

7,440 

7,540 

7,190

6,870 

6,910 

6,940 

6,910 

6,900

6,550 

6,240 

6,140 

6,340 

6,480 

6,730

216,210

418 

420 

420 

420 

425

400 

387 

344 

360 

356

357 

344 

343 

314 

316 

333 

320 

388 

389 

447

473 

414 

401 

438 

463

412

352 

404 

428 

419 

410

-

8,580 

a 8, 620 

a 8, 550 

a 8, 630 

8,700

7,880 

7,470 

6,760 

6,900 

6,660

6,570 

6,110 

5,870 

5,640 

5,840 

6,270 

6,170 

7,790 

7,920 

8,680

8,770 

7,720 

7,510 

8,170 

8,630

7,290 

5,930 

6,700 

7,330 

7,330 

7,450

228,440

Total discharge for year (cfs-days) , Total load for year (tons)..........

4,960,220

48,729,070

a Computed from estimated concentration graph.
COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM -Continued 

COLORADO RIVER NEAR GRAND CANYON, ARIZ. Continued

Suspended sediment, water year October 1950 to September 1951--Continued

Day

2

o

12

9n

21

22

23

25

29

31 

Total2

o

g

12

1ft

If)

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

April

Mean

charge

(cfs)

6,900 

7,070 

7,880 

8,610 

8,870

8,500 

8,550 

8,690 

8,280 

7,850

7,660 

7,730 

8,080 

8,120 

8,490

8,950 

9,230 

9,260 

9,080 

8,810

8,610 

8,230 

8,000 

8,030 

8,450

9,810 

11,000 

12,100 

13,800 

15,100

269,940

Suspended sediment

Mean 

concentration 

(ppm)

406 

372 

383 

700 

915

729 

678 

894 

843 

865

1,780 

1,760 

1,550 

1,540 

1,520

1,500 

1,490 

1,360 

1,250 

1,360

1,440 

1,870 

2,120 

1,640 

1,300

1,170 

1,610 

1,840 

2,090 

2,330

--

Tons 

per 

day

7,560 

7,100 

8,150 

a 16, 600 

21,900

16,700 

15,800 

21,000 

18,800 

18,300

36,800 

36,700 

33, 800 

a 33, 800 

a 34, 800

a 36, 200 

37,100 

34, 000 

30, 600 

32,400

33, 500 

41,600 

45, 800 

35, 600 

29,700

31,000 

47,800 

60, 100 

77,900 

95,000

996,110

July

42, 300 

39,700 

37,200 

35,200 

32, 800 

30,600 

29,700 

28,800 

27,700 

25,800 

24, 300 

23,400 

22,300 

21,200 

20, 300

19,200 

18,400 

17,600 

16,800 

16,100

15,900 

16, 200 

16,800 

16, 100 

15,700

15,200 

15,700 

16, 800 

15,700 

15,400 

15,300

704, 200

2,100 

1,620 

1,700 

1,720 

1,700

1,410 

950 

936 

929 

801 

809 

746 

622 

660 

584

456 

464 

450 

386 

366

342 

391 

632 

602 

7,130

1,310 

800 

2,860 

3,300 

8,950 

5,250

--

240, 000 

a 174, 000 

a 171, 000 

a 163, 000 

a 151, 000 

116,000 

76,200 

72,800 

69, 500 

55, 800 

53,100 

47,100 

37,400 

37,800 

32,000

23,600 

23, 100 

21,400 

17,500 

15,900

14,700 

17,100 

28,700 

26,200 

302,000

53, 800 

33,900 

s 130,000 

s 143,000 

372,000 

217,000

2,936,600

May

Mean

charge

(cfs)

15,000 

15, 100 

15,800 

15,800 

16,200

15,900 

15,000 

14, 500 

14, 300 

14,000

14,600 

16, 500 

18,900 

20, 900 

23, 800

26, 500 

26,300 

26,000 

25,800 

25,100

24, 500 

25,600 

28,400 

32, 800 

35,700

36, 800 

38, 000 

38, 800 

41,400 

48, 000 

56,300

782,300

Suspended sediment

Mean 

concentration 

(ppm)

2,410 

2,320 

2,270 

2,200 

2,400

2,140 

1,870 

1,720 

1,560 

1,400

1,450 

2,060 

2,630 

3,300 

4,640

5,560 

4,950 

3,970 

3,700 

3,850

3,400 

4,200 

3,700 

5,500 

6,120

5,700 

5,580 

5,760 

5,320 

5,970 

6,700

--

Tons 

per 

day

97,600 

94,600 

a 96, 800 

93, 900 

105,000

91,900 

75,700 

a 67, 300 

a 60, 200 

52,900

57,200 

91,800 

134,000 

186,000 

298, 000

398, 000 

351,000 

279, 000 

258,000 

261,000

225,000 

290,000 

284,000 

487,000 

590, 000

566,000 

572,000 

603,000 

595,000 

774,000 

1,020,000

9,156,100

August

15,000 

14, 200 

14,700 

18,200 

21,300 

23,800 

24, 000 

22, 300 

18,800 

17,500 

15,900 

14,900 

14,200 

13,700 

13, 100

12,200 

11,400 

10,600 

9,740 

9,150

8,660 

8,290 

8,020 

7,720 

7,320

7,360 

7,660 

7,510 

9,950 

13,200 

19,400

419,780

3,100 

3,640 

5,600 

8,690 

13,000 

13,900 

12,100 

16,800 

18, 500 

17,700 

15,600 

10,700 

7,200 

5,900 

4,910

4,490 

3,700 

2,000 

1,750 

2,030

1,900 

1,200 

1,060 

852 

1,000

1,300 

1,600 

1,000 

4,200 

27,300 

61,800

--

126,000 

140, 000 

222,000 

s 485, 000 

743,000

s 900,000 

784,000 

81,010,000 

339, 000 

836,000 

670,000 

430,000 

276,000 

218,000 

174,000

148,000 

114,000 

57,200 

46,000 

a 50, 200

44,400 

26,900 

23,000 

17,800 

19,800

25,800 

33, 100 

20,300 

s 117, 000 

8924,000 

53,460,000

13,080,500

June

Mean

charge

(cfs)

61,900 

61,900 

60,200 

59, 600 

57,400

53,000 

49, 900 

46,000 

43, 200 

40, 600

39, 300 

38, 800 

38, 400 

38,000 

36, 400

34, 800 

33,600 

34,000 

34, 800 

39,300

46,000 

49, 900 

53,000 

56,300 

58, 500

56,300 

52,000 

48,400 

46,000 

44, 200

1,411,700

Suspended sediment

Mean 

concentration 

(ppm)

8,300 

7,820 

6,110 

6,000 

5,260

5,120 

4,210 

3,920 

3,920 

2,970

2,540 

2,560 

2,590 

2,220 

2,260

1,780 

1,940 

1,650 

1,800 

2,250

3,220 

4,060 

3,600 

3,520

4,750

3,900 

3,300 

3,400 

2,910 

2,760

Tons 

per 

day

1,390,000 

1,310,000 

993,000 

966,000 

815,000

733,000 

567,000 

487,000 

557,000 

326,000

270,000 

268, 000 

269, 000 

228, 000 

222,000

167,000 

176,000 

151,000 

169,000 

239, 000

400,000 

547,000 

515,000 

535,000 

750,000

593, 000 

463,000 

444, 000 

361,000 

329, 000

15,140,000

September

18,300 

17,100 

14,100 

12,600 

11,500

11,300 

10,000 

8,900 

8,130 

7,510 

7,080 

6,730 

6,600 

6,480 

6,170

5,820 

5,570 

5,280 

5,130 

4,930

4,820 

4,820 

4,790 

4,750 

4,740

4,710 

4,740 

4,730 

4,700 

5,740

227,770

33,600 

20,800 

17,300 

13,000 

9,700 

13,400 

14,400 

11,100 

8,800 

5,620 

4,000 

3,550 

4,810 

4,820 

3,130

2,300 

1,500 

1,100 

828 

708

643 

727 

520 

490 

470

476 

508 

424 

353 

3,110

-

si, 7 10,000 

960,000 

659,000 

a 442, 000 

301,000

409, 000 

389, 000 

267,000 

193,000 

114,000 

76, 500 

64, 500 

85,700 

84, 300 

52, 100

36, 100 

22, 600 

15,700 

11,500 

9,420

8,370 

9,460 

6,730 

6,280 

6,020

6,050 

6,500 

5,410 

4,480 

a 50, 900

6,012,620

s Computed by subdividing day.

a Computed from estimated concentration graph.
COLORADO RIVER MAIN STEM--Continued 

COLORADO RIVER NEAR GRAND CANYON, ARIZ. Contin

Particle-size analyses of suspended sediment, water year October 1950 t

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Oct. 6 .................

Oct. 10 ................

Oct. 13 ................

Oct. 21 ................

Oct. 27 ................

Nov. 10 ................

Nov. 17 ................

Nov. 21 ................

Nov. 24 ................

Nov. 28 ................

Dec. 1 .................

Dec. 29, 1950; Jan. 2, 9, 

12, 16, 19, 23, 26, 30, 

1951; Feb. 2, 6........

Feb. 9, 13, 16, 23, 27, 

Mar. 6 ...............

Apr. 10 ................

Apr. 20 ................

Apr. 30 ................

May 11 .................

May 14.............. ...

May 24 .................

May 29 .................

May 31.................

Time

7:40 a.m. 

8:45 a. m. 

8:40 a. m. 

9:15 a. m. 

7:40 a.m. 

9:45 a.m. 

8:15 a.m. 

8:40 a. m.

B'.'JO a. m. 

2:15 p. m. 

8:30 a.m. 

8:30 a.m. 

8:15 a.m. 

8:30 a. m. 

8:30 a.m.

8:40 a. m. 

^Composite

^Composite

8:45 a. m. 

8:45 a.m. 

1:45 P- m8:30 a, m. 

9:20 a. m. 

8:40 a.m. 

2:35 p. m. 

8:30 a.m.

Water 

discharge 

(cfs)

7,240 

6,690 

6,300 

6,000 

5,570 

5,320 

5,190 

5,230

5,140 

5,300 

5,680 

5,880 

6,130 

6,720 

7,540

7,910 

5,440

7,400

8,030 

8,900 

15,300 

14,000 

20,300 

32, 200 

41,000 

55.200

Suspended sedim

Concentration 

of sample 

(ppm)

2,500 

1,250 

738 

648 

499 

362 

298 

266

241 

256 

325 

345 

346 

386 

493

1,290 

219

396

a 900 

b 1,360 

a 2, 420 

al,650 

b3,050 

4,960 

b5,320 

9.000

Concentration 

of suspension 

analyzed 

(ppm)

2,410 

986 

2,500 

2,490 

1,990 

1,410 

1,090 

974

930 

1,040 

1,330 

1,290 

1,410 

1,570 

1,860

4,980 

1,890

1,920

2,700 

2,170 

2,150 

2,140 

2,110 

2,590 

1,630 

3,560

Percent finer 

0.002

60 

29 

26 

32 

39 

34 

39

39 

28 

35 

38 

28 

29 

26

16 

40

47

0.004

76 

71 

46 

49 

52 

52 

49 

52

46 

40 

47 

50 

44 

39 

37

44 

55

56

42 

72 

26 

32 

23 

12 

22 

12

0.008

85 

67 

64 

65 

63 

57 

63

54 

51 

60 

63 

57 

56 

53

59 

67

70

0.016

89 

93 

80 

85 

82 

82 

75 

82

77 

72 

77 

79 

74 

72 

72

73 

79

81

64 

81 

44 

47 

41 

20 

31 

20

0.

a Estimated.

b Concentration from another set of samples taken at same time.
COLORADO RIVER MAIN STEM -Continued 

COLORADO RIVER NEAR GRAND CANYON, ARIZ. Continu

Particle-size analyses of suspended sediment, water year October 1950 to Septe

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; S

W, in distilled water; C, chemically dispersed; M, mechanically 

Date of collection

Tun 1, 1951.... ........

Jun 18. ................

Jun 21. ................

July 1 ..................

July 6 ..................

July 28 .................

July 29 .................

Aug. 7 .................

Aug. 10 ................

Aug. 15 ................

Aug. 22 ................

Aug. 31 ................

Aug. 31 ................

Sept. 10 ................

Sept. 20 ................

Time

4:40 p. m. 

9:30 a. m. 

8:40 a. m. 

8:25 a.m. 

8:30 a. m. 

9:15 a.m. 

8:40 a. m. 

7:40 a.m. 

10:00 a. m.

9:00 a. m. 

9:00 a. m. 

9:00 a.m. 

9:00 a. m. 

8:30 a. m. 

8:30 a. m. 

8:20 a. m. 

9:00 a. m. 

9:00 a. m. 

10:00 a. m. 

8:30 a.m.

Water 

discharge 

(cfs)

63,100 

41,000 

33,600 

45,100 

48,900 

42,800 

31,000 

18,400 

15,200

23,700 

23,700 

23,700 

23,700 

17,600 

13, 100 

8,340 

22,000 

22,000 

7,600 

5,000

Suspended sedim

Concentration 

of sample 

(ppm)

b7,040 

3,350 

2,150 

a 4, 300 

3,400 

2,830 

1,060 

2,940 

3,500

11,800 

11,800 

11,800 

11,800 

16,700 

b4,910 

2,140 

75,800 

75,800 

a 6, 100 

616

Concentration 

of suspension 

analyzed 

(ppm)

2,960 

2,600 

2,390 

1,420 

4,470 

2,600 

1,010 

5,100 

4,280

3,680 

3,610 

3,930 

3,010 

3,220 

5,480 

6,160 

4,160 

3,970 

3,950 

1,450

Percent finer 

0.002

6 

24

23

11

43 

4 

44 

3

43 

42

71

0.004

20 

9 

27 

23 

56 

24 

13 

48 

75

58 

7 

56 

3 

65 

61 

76 

49 

55 

87 

75

0.008

12 

31

26 

16

69 

31 

64 

12

59 

60

90

0.016

39 

15 

34 

25 

62 

29 

22 

91 

91

82 

79 

74

89 

81 

 89 

69 

71 

91 

97

0.0

a Estimated.

b Concentration from another set of samples taken at same time.
VIRGIN RIVER BASIN 

VIRGIN RIVER AT VIRGIN, UTAH

LOCATION. At gaging station, 1J miles southwest of Virgin, Washington County, and about 2 miles downst

DRAINAGE AREA. 934 square miles.

RECORDS AVAILABLE. Chemical analyses: October 1950 to September 1951.

Water temperatures: October 1950 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 940 ppm Aug. 23-24, 29; minimum, 437 ppm May 1-10.

Specific conductance: Maximum daily, 1,460 micromhos Aug. 29; minimum daily, 559 micromhos May 15.

Water temperatures: Maximum, 88"F July 18, 28-30; minimum, freezing point Mar. 2.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduct

Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given in W

Chemical analyses, in parts per million, water year October 1950 to Sep

Date of collection

Oct. 1-10, 1950 ..... 

Oct. 11-20..........

Oct. 21-31 ..........

Nov. 11-20 .........

Nov. 21-30 .........

Dec. 1-10...........

Dec. 11-20 .........

Dec. 21-31 .........

Jan. 1-10, 1951 ..... 

Jan. 11-20..........

Jan. 21-31..........

Feb. 1-10 ..........

Feb. 11-19 .........

Feb. 20-28 .........

Mar. 1-10 ..........

Mar. 11-20 .........

Apr. 1-10 ..........

Apr. 11-20 .........

Apr. 21-30 .........

May 1-10 ...........

May 11-20 ..........

May 21-31 ..........

June 1-10...........

June 11-20..........

June 21-30 ..........

Mean 

discharge 

(cfs)

71.4 

73.1 

81.4 

93.0 

120 

126

119 

115 

110 

108 

120 

128

126 

121 

121 

132 

123 

117

128 

120 

161 

164 

151 

106

75.2 

60.2 

55.6

Temperature 

(°F)

Silica 

(Si02)

15 

15

15 

14

13 

13

9.9 

13

Iron 

(Fe)

Calcium 

(Ca)

86 

86

76 

79

70 

69

80 

78

Magnesium 

(Mg)

36 

35

35 

33

31 

33

30 

34

Sodium P°^- 

,M > slum 

(Na) (K)

56 

53

53 

53

36

48

67

Bicarbonate 

(HCO,)

217

232 

235

237 

235

246

217 

230

214 

211

Sulfate 

(S04)

205 

194

165 

156

135 

137

202

Chloride 

(Cl)

64

61 

55

58 

59

58

43

57

52 

68

Fluo* 

ride 

(F)

Nitrate 

(NO,)

2.0 

2.1

1.6 

2.0

2.7 

1.5

1.5 

1.5

B

r

(B
VIRGIN RIVER BASIN--Continued

VIRGIN RIVER AT VIRGIN, UTAH Continued

Chemical analyses, in parts per million, water year October 1950 to Sept

Date of collection

July 1-10, 1951......

July 11-20 ..........

July 21-31 ..........

Aug. 11-20 .........

Aug. 21-22, 27-28, 

30-31 .............

Aug. 23-24, 29 ......

Aug. 25-26 .........

Sept. 1-10 ..........

Sept. 11-20 .........

Sept. 21-27, 29-30 .. 

Sept. 28 a

Weighted average . .

Mean 

discharge 

(cfs)

51.0 

53.4 

59.3

114 

54.9

111 

302 

47.5 

70.1 

57.6 

69.1 

171

c!03

Temperature 

(°F)

Silica 

(Si02 )

16 

13

15 

14 

14 

13

-

Iron 

(Fe)

Calcium 

(Ca)

92 

80

97 

78 

85 

354

--

Magnesium 

(Mg)

35 

35

30 

31 

32 

25

--

Sodium 

(Na)

Potassium 

(K)

57 

55

41 

49 

60

Bicarbonate 

(HCOS )

227 

215

209 

198 

203 

b204

Sulfate 

(SO,)

208 

182

178 

163 

201

Chloride 

(Cl)

67 

68

68 

68 

68 

54

Fluoride 

(F)

Nitrate 

(NO,)

1.2 

1.5

1.9 

1.7 

1.8 

2.2

-

B

ro

(B

a Not included for computation of weighted averages.

b Includes equivalent of 16 parts per million of carbonate (CO,). '

c Represents more than 99 percent of runoff for water year October 1950 to September 1951.
VIRGIN RIVER BASIN 163

VIRGIN RIVER BASIN -Continued

VIRGIN RIVER AT VIRGIN, UTAH Continued

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

-_

66

68

70

70

70

70

70

70

70

70

70

70

69

68

68

68

68

68

_

58

53

58

60

62

63

64

62

60

53

66

Nov.

58

60

60

60

58

56

57

47

46

46

47

46

46

51

51

50

46

54

57

60

56

54

53

54

53

52

51

50

50

--

 53

Dec.

52

46

46

52

46

47

48

52

52

50

50

50

48

49

50

50

50

50

48

48

48

48

46

47

47

45

45

44

38

44

42

48

Jan.

38

40

40

42

46

44

42

42

41

38

42

42

41

42

44

45

45

47

45

45

46

48

50

51

52

50

50

45

41

40

38

44

Feb.

41

40

49

--

53

51

55

52

55

54

51

51

40

50

49

49

52

49

48

50

51

50

45

50

51

48

42

50

--

_.

--

49

Mar.

45

32

36

39

50

57

57

50

42

55

53

40

42

43

53

55

51

38

51

42

43

46

42

42

44

44

45-

42

42

47

45

46

Apr.

43

48

48

52

52

50

50

63

52

45

46

49

50

53

54

52

55

53

55

64

52

58

56

58

54

58

48

44

--

52

May

46

46

49

55

54

57

55

60

55

58

62

54

52

55

48

58

53

59

62

58

60

59

72

72

62

62

64

62

70

60

57

58

June

56

52

53

52

66

52

58

59

58

62

59

61

80

62

72

70

62

66

65

68

62

74

62

64

62

64

..

62

63

64

62

July

64

63

64

65

64

64

64

66

65

72

63

63

64

66

69

88

86

88

86

85

85

84

84

80

80

82

80

88

88

88

83

75

Aug.

75

70

70

75

80

66

65

80

83

83

84

80

85

84

69

70

79

79

82

83

82

83

75

78

80

82

80

79

60

78

80

77

Sept.

79

80

81

80

78

79

80

80

78

79

77

75

76

75

78

79

78

76

75

75

78

76

77

75

75

75

65

71

73

77
VIRGIN RIVER BASIN Continued 

WASHINGTON FIELDS CANAL NEAR WASHINGTON, UTAH

LOCATION. At gaging station, about li miles southeast of Washington, Washington County.

RECORDS AVAILABLE. Chemical analyses: October 1950 to September 1951.

REMARKS. Values reported for dissolved solids are sums of determined constituents.

Chemical analyses, In parts per million, Water year October 1950 to Septe

Date of collection

Oct. 9, 23, 30, 1950

Nov. 6, 14, 22, 27..

Dec. 5, 11, 18, 24 .

Jan. 3, 8, 15, 23,

29, 1951 .........

Feb. 5 ...........

Feb. 13, 19, 26 ...

Mar. 5, 12, 19, 27 .

Apr. 2, 9, 23, 27...

Apr. 29 ...........

May 6, 16, 21 .....

May 28 ...........

June 4, 11, 18, 25..

July 1, 12, 16, 24, 30

Aug. 6, 13, 23, 28 .

Sept. 4, 11, 17, 24 .

Mean 

discharge 

(cfs)

Temperature 

<°F)

Silica 

(Si02)

22

20

20

18

17

30

18

17

__

14

__

25

25

23

23

Iron 

(Fe)

Calcium 

(Ca)

175

146

136

134

123

139

127

147

_-

122

__

187

194

294

182

Magnesium 

(Mg)

65

52

47

AQ

to

44

51

47

55

__

38

--

71

72

65

67

Sodium 

(Na)

Potassium 

(K)

415

244

247

96 , .7

1 Q3 

lod

240

227

282

__

172

__

466

540

401

489

Bicarbonate 

(HCO,)

251

277

268

278

97Q 

6 Id

276

272

245

__

236

--

246

238

242

226

SuUate 

(S04)

574

404

381

440

34O

*»nn

oua

380

344

428

233

300

CfTfl

0 16

633

696

868

633

Chloride 

(Cl)

568

325

320

295

255

322

298

395

70

230

570

645

732

545

670

Fluo* 

ride 

(F)

Nitrate 

(NO,)

3.7

4.0

3.0

3.4

3 Q . a

2.5

3.0

3.8

«.-

3.9

__

3.1

4.2

2.4

2.8

Bo

ron 

(B)
VIRGIN RIVER BASIN Continued 

SANTA CLARA RIVER ABOVE WINSOR DAM, NEAR SANTA CLARA, 

LOCATION. At gaging station 2 miles upstream from Winsor Dam, 2J miles downstream from Sandy Wash, 8 m

northwest of Santa Clara, Washington County. 

DRAINAGE AREA. 338 square miles.

RECORDS AVAILABLE. Chemical analyses: October 1950 to September 1951 

REMARKS.--Values reported for dissolved solids are residue on evaporation. Records of discharge for wa

tfater-Supply Paper 1213.

Chemical analyses, in parts per million, water year October 1950 to Septem

Date of collection

Oct. 2, 9, 23, 31, 1950

Nov. 6, 13, 21, 27...

Dec. 4, 11, 19, 24..

Jan. 3, 8, 15, 23,

30, 1951 .........

Feb. 5, 13, 20, 26 .

Mar. 5, 12, 19, 26 .

Apr. 2, 9, 16, 23, 30

May 8, 15, 21, 28 ..

June 4, 12, 25 .....

July 1, 16, 25, 30 . .

Aug. 6, 12, 23, 28 .

Sept. 4,11, 17, 24,30

Mean 

discharge 

(cfs)

10.4

13.0

13.2

13.8

14.0

14.0

13.6

17.0

10.6

5.5

7.3

7.1

Temperature 

<°F)

Silica 

(Si02)

34

37

36

35

33

36

31

27

31

34

38

36

Iron 

(Fe)

Calcium 

(Ca)

47

52

55

56

58

58

52

44

46

46

51

52

Magnesium 

(Mg)

14

18

18

17

18

21

20

16

19

18

18

21

Sodium 

(Na)

Potassium 

(K)

24

23

12

12

16

12

10

19

20

20

11

21

Bicarbonate 

(HCO,)

204

230

206

206

225

230

209

200

206

200

197

220

Sulfate 

(SOJ

28

29

31

30

32

33

30

25

32

33

31

39

Chloride 

(CD

22

24

25

24

24

24

22

19

24

23

22

28

Fluoi 

ride 

(F)

Nitrate 

(NO,)

0.4

.9

.4

1.1

1.6

1.3

1.3

.6

.4

.6

.6

.8

Boron 

(B)
VIRGIN RIVER BASIN--Continued 

SANTA CLARA RIVER AT ST. GEORGE, UTAH

LOCATION. At gaging station half a mile above mouth and 2 miles south of St. George, Washington County. 

RECORDS AVAILABLE. Chemical analyses: October 1950 to September 1951.

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of discharg

given in Water-Supply Paper 1213.

Chemical analyses, in parts per million, water year October 1950 to Septem

Date of collection

Oct. 2, 9, 23, 30, 1950

Nov. 6, 13, 21, 27 ..

Dec. 4, 12, 18, 24 ..

Jan. 3, 8, 15, 22, 29,

1951

Feb. 13, 19, 26 .....

Mar. 5, 12, 19 .....

Apr. 3, 10, 16, 23, 29

May 7, 14, 22, 28 ...

June 5, 11, 18, 25 ...

July 1,12, 16, 24,

28, 30.............

Aug. 6, 13, 22, 28 . .

Sept. 4, 11, 17, 24, 28

Mean 

discharge 

(cfs)

0.4

3.7

6.1

1.3

7.0

1.8

1.4

1.1

15.2

.5

28.9

Temperature 

(°F)

Silica 

(Si02)

41

39

36

07

33

37

34

39

40

44

44

36

Iron 

(Fe)

Calcium 

(Ca)

331

204

173

351

141

319

334

332

420

395

440

Magnesium 

(Mg)

102

63

47

102

42

99

106

107

98

97

Sodium P°taS- 

,,_ x sium 

(Na) (K)

142

76

64

flfl

133

45

119

113

132

127

115

Bicarbonate 

(HC03)

428

338

340

480

311

445

416

428

347

297

Sulfate 

(S04 )

1,040

559

403

1,040

298

952

1,020

1,050

1,210

1,350

Chloride 

(Cl)

86

53

46

58

77

40

75

79

79

85

70

Fluoi 

ride 

(F)

Nitrate 

(N03 )

0.1

.8

.8

.7

1.9

.5

.4

.5

1.9

.4

Boron 

(B)
VIRGIN RIVER BASINVIRGIN RIVER NEAR ST.

-Continued 

GEORGE, UTAH

LOCATION. At gaging station 8 miles southwest of St. George, Washington County. 

RECORDS AVAILABLE.--Chemical analyses: October 1950 to September 1951. 

REMARKS.--Values reported for dissolved solids are sums of determined constituents, 

given in Water-Supply Paper 1243. (Includes records for period 1950-52).

Record of discha

Chemical analyses, in parts per million, water year October 1950 to Se

Date of collection

Oct. 2, 9, 23, 30, 1950

Nov. 6, 13, 21, 27..

Dec. 4, 11, 18, 24..

Jan. 3, 8, 15, 22,

Feb. 5, 12, 19, 24..

Mar. 5, 12, 19, 26 .

Apr. 2, 9, 16, 23, 29

May 7, 14, 21, 28 ..

Mean 

discharge 

(cfs)

26.8

105

97.2

95.8

111

74.9

38.4

915

222

Temperature

Silica 

(Si02)

21

21

20

20

20

21

19

24

21

Iron 

(Fe)

Calcium 

(Ca)

434

325

252

208

209

288

264

336

Magnesium 

(Mg)

115

71

70

67

73

109

96

90

87

Sodium 

(Na)

Potassium 

(K)

488

297

296

279

274

332

293

389

Bicarbonate 

(HCO,)

255

259

270

257

268

231

225

492

236

Sulfate 

(S04 )

1,410

938

756

654

663

978 

527

833

1,070

Chloride 

(Cl)

665

395

390

360

358

480

450

520

Fluo" 

ride 

(F)

Nitrate 

(NO,)

3.9

5.0

2.4

3.4

3.1

3.9

4.6

1.8
VIRGIN RIVER BASIN Continued 

VIRGIN RIVER AT LITTLEFIELD, ARIZ.

LOCATION. At gaging station, three-eighths of a mile downstream from Beaverdam Wash and three-eigh

DRAINAGE AREA. 5,090 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: July 1949 to September 1951.

Water temperatures: October 1947 to September 1951.

Sediment records: October 1947 to September 1951. 

EXTREMES, 1950-51.--Specific conductance: Maximum daily, 3,780 micromhos Aug. 24; minimum daily, 1

Water temperatures: Maximum observed, 86°F Sept. 1; minimum observed, 41°F Feb. 1.

Sediment loads: Maximum daily, 706,000 tons Aug. 4; minimum daily, 47 tons June 25. 

EXTREMES, 1947-51. Specific conductance (1949-51): Maximum daily, 3,950 micromhos Aug. 12, 1950; 

Water temperatures: Maximum observed, 90°F June 30, 1950; minimum observed, 35°F Jan. 4, 1949, J

Sediment concentrations: Maximum daily, 84,600 ppm July 18, 1950; minimum daily, 150 ppm Oct. 13

Sediment loads: Maximum daily, 706,000 tons Aug. 4, 1951; minimum daily, 30 tons Oct. 3, 1947 (r

REMARKS.--Values reported for dissolved solids are sums of determined constituents. Records of spe

office at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1

Chemical analyses, in parts per million, water year October 1950 t

Date of collection

Oct. 1-10, 1950 ...

Jan. 1-10, 1951....

Mean 

discharge 

(cfs)

68.5 

76.3 

91.1 

108 

162 

175

169 

168 

163 

181 

188 

171

162 

126 

127 

157 

163 

77.1

76.2 

85.2 

189

Temperature 

(°F)

Silica 

(Si02)

23

19

24 

21

22 

21

24

Iron 

(Fe)

Calcium 

(Ca)

344 

358

298 

280

296 

268

354

Magnesium 

(Mg)

122

96

88 

86

97 

87

74

Sodium P°^- 

(Na) s(£»

282 

274

289 

264

251 

258

342

Bicarbonate 

(HCO.)

259 

303

296 

313

307 

308

294

Sulfate 

(S04 )

1,150 

1,040

930 

840

934 

819

1,120

Chloride 

(Cl)

400 

390

370 

350

325 

340

370

Fluo* 

ride 

(F)

Nitrate 

(NO

1.

3.

1.

1.

2.

2.

1.
Sept. 21-30.........

Weighted average . .

174 

101

65.0 

60.3 

62.4 

59.0 

59.7 

161

527 

64.2 

228 

99.8 

66.0 

145

138

23

24 

27

24 

24

--

308

354 

354

354 

350

--

92

125 

128

128 

128

--

251

262 

266

245 

251

--

298

250 

284

266 

293

--

930

. 1,170 

1,160

1,140 

1,130"

340

385 

388

380

375

--

1.9

.9 

.9

1.1 

1.3

--
170 COLORADO RIVER BASIN

VIRGIN RIVER BASIN Continued 

VIRGIN RIVER AT LITTLEFIELD, ARIZ. Continued

Temperature (°F) oi water, water year October 1950 to September 1951 

>nce-daily temperature measurement, generally between 7 a. m. and 9 a. m. /

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

Average

Oct.

60

a 73

60

61

62

66

63

62

67

67

65

_

63

65

68

66

67

65

63

66

a73

62

62

62

65

63

66

64

62

a 66

63

65

Nov.

62

62

62

60

59

59

a 68

58

58

52

51

49

52

57

54

a61

55

55

58

58

59

59

55

54

54

54

53

52

53

52

56

Dec.

53

52

52

53

a 57

a 58

54

56

54

55

55

55

53

54

55

55

54

53

53

52

52

52

a 56

51

50

48

47

48

49

51

53

53

Jan.

48

46

47

52

48

a48

45

a48

44

45

48

50

48

48

a 55

a 52

49

49

53

50

47

51

51

51

52

51

52

54

58

48

42

49

Feb.

41

43

47

50

51

51

54

55

54

55

57

56

55

54

a 64

54

52

55

52

59

50

a 63

57

53

52

57

55

55

__

54

Mar.

52

51

51

51

53

56

57

57

a61

58

51

a 59

a 58

58

58

58

a 62

49

53

55

a 67

58

_

a71

56

a 76

61

56

59

60

58

Apr.

69

60

a 65

a66

a72

65

63

65

a71

..

62

62

a 78

65

65

a73

65

a70

a 77

a 77

65

66

65

66

a 68

63

64

a 69

a 54

66

May

55

57

60

63

62

64

62

63

65

67

66

68

63

65

63

60

67

67

67

67

68

67

66

68

70

71

69

69

a 83

68

66

66

June

64

64

a75

66

67

76

a 80

77

67

67

65

66

67

69

69

76

73

a 76

69

70

67

68

69

68

68

a78

66

68

69

71

--

70

July

69

70

75

71

67

68

73

69

69

a 84

69

68

a85

70

72

75

74

74

75

74

73

70

73

74

74

73

74

a 82

74

76

73

73

Aug.

72

74

75

72

76

72

70

68

69

70

70

70

72

72

71

a 80

72

72

73

72

74

77

77

a76

67

67

71

72

71

69

72

72

Sept.

a 86

70

69

68

67

68

68

69

68

66

68

69

64

66

66

67

67

a 83

68

70

a 74

64

63

68

67

66

66

a 69

67

68

69

a Between 10 a. m. and 5 p. m.
VIRGIN RIVER BASIN 171

VIRGIN RIVER BASIN Continued 

VIRGIN RIVER AT LITTLEFIELD, ARIZ. Continued

Suspended sediment, water year October 1950 to September 1951

Day

0

12

14- 

1 c

1ft

OQ

24

oc

Oft

OQ

ort

31 

TotalQ

12

15 

1 g

22 

23 

24 

25 

26 

27 

28 

29 

30 

31 

Total

October

Mean

charge

(cfs)

66 

66 

64 

66 

69

69 

69 

71 

71 

74

74 

74 

72 

74 

75 

74 

75 

80 

82 

83 

82 

83 

88 

93 

95

90 

90 

88 

95 

101 

97

 2,450

Suspended sediment

Mean 

concentration 

(ppm)

1,230 

906 

795 

1,450 

730

804 

951 

718 

593 

745

1,060 

801 

559 

631 

725

561 

614 

847 

1,000 

1,300

936 

1,530 

1,380 

1,500 

1,940

2,000 

1,290 

1,840 

2,060 

2,050 

2,120

Tons 

per 

day

219 

161 

137 

258 

136

150 

177 

138 

114 

149

212

160 

109 

126 

147

112 

124 

183 

221 

291

207 

343 

328 

377 

498

486 

313 

437 

528 

559 

555

7,955

January

168 

182 

182 

179 

190

201 

193 

173 

171 

168

184 

204 

207 

179 

176

182 

190 

187 

187 

184

179 

176 

176 

179 

176

163 

153 

148 

153 

134 

190

5,564

2,000 

2,160 

3,100 

2,230 

2,450

2,940 

2,200 

2,510 

3,070 

2,020

2,690 

3,140 

3,080 

2,870 

3,170

2,450 

2,790 

2,490 

4,070 

2,600

5,420 

3,250 

2,360 

2,470 

2,160

2,530 

3,840 

1,760 

1,880 

2,960 

2,770

~

907 

1,060 

1,520 

1,080 

1,260

1,600 

1,150 

1,170 

1,420 

916

1,340 

1,730 

1,720 

1,390 

1,510

1,200 

1,430 

1,260 

2,050 

1,290

2,620 

1,540 

1,120 

1,190 

1,030

1,110 

1,590 

703 

777 

1,470 

1,420

41,573

November

Mean

charge

(cfs)

99 

101 

104 

110 

110

110 

108 

112 

114 

116

119 

119 

121 

136 

168

193 

179 

179 

182 

226

226 

187 

176 

173 

176

160 

166 

160 

160 

166

4,456

Suspended sediment

Mean 

concentration 

(ppm)

1,670 

2,500 

2,220 

2,280 

3,200

2,560 

2,650 

2,640 

2,800 

2,300

2,890 

2,940 

2,670 

3,550 

5,180

4,720 

3,750 

4,200 

3,660 

7,380

7,120 

4,230 

3,190 

3,570 

2,690

2,790 

2,630 

2,560 

2,590 

2,670

Tons 

per 

day

446 

682 

623 

677 

950

760 

773 

798 

862 

720

929 

945 

872 

1,300 

2,350

2,460 

1,810 

2,030 

1,800 

4,500

4,340 

2,140 

1,520 

1,670 

1,280

1,210 

1,180 

1,110 

1,120 

1,200

43,057

February

168 

150 

158 

182 

201

173 

160 

148 

145 

134

132 

134 

125 

121 

119

123 

132 

125 

125 

145

143 

114 

112 

125 

129

125 

125 

129

3,902

2,230 

1,860 

2,350 

2,360 

2,850

3,250 

2,460 

2,350 

2,350 

1,780

,750 

,850 

,900 

,500 

,770

1,220 

1,950 

1,340 

1,320 

2,840

4,280 

1,330 

1,620 

1,600 

1,490

 1,360 

1,500 

1,400

1,010 

753 

1,000 

1,160 

1,550

1,520 

1,060 

940 

920 

644

624 

669 

641 

490 

569

405 

695 

452 

446 

1,110

1,650 

409 

490 

540 

519

459 

506 

488

21,719

. December

Mean

charge

(cfs)

171 

158 

171 

166 

173

171 

184 

179 

168 

153

163 

166 

179 

182 

182

171 

166 

160 

160 

153

155 

166 

166 

150 

166

182 

176 

163 

155 

153 

163

5,171

Suspended sediment

Mean 

concentration 

(ppm)

2,480 

2,140 

2,480 

2,290 

2,090

2,380 

2,390 

3,410 

2,650 

2,390

2,000 

2,300 

2,580 

2,450 

2,360

2,590 

2,270 

1,910 

1,970 

1,780 

1,790 

2,150 

2,100 

2,280 

2,010

2,100 

2,430 

2,020 

1,900 

1,730 

2,040

Tons 

per 

day

1,140 

913 

1,140 

1,030 

976

1,100 

1,190 

1,650 

1,200 

987

880 

1,030 

1,250 

1,200 

1,160

1,200 

1,020 

825 

851 

735

749 

964 

941 

923 

901

1,030 

1,150 

889 

795 

715 

898

31.432

March

134 

166 

207 

179 

168

150 

148 

148 

145 

127

166 

187 

173 

168 

163

163 

168 

155 

150 

138 

110 

95 

77 

74 

75

72 

69 

68 

68 

66 

74

4,051

1,720 

2,110 

3,370 

2,340 

2,510

1,890 

1,970 

2,370 

1,810 

2,020

2,280 

3,010 

2,180 

2,150 

2,090

1,920 

2,440 

1,930 

1,680 

1,630

1,310 

1,080 

1,030 

834 

1,100

726

753 

871 

1,100 

936 

977

622 

946 

1,880 

1,130 

1,140

765 

787 

947 

709 

693

1,020 

1,520 

1,020 

975 

920

845 

1,110 

808 

680 

607

389 

277 

214 

167 

223

141 

140 

160 

202 

167 

195

21,399
172 COLOuOO RIVER BASIN

VIRGIN RIVER BASTN--Continued

VIRGIN RIVER AT LITTLEFIELD, ARIZ. Continued

Suspended sediment, water year October I960 to September 1951 Continued

Day

2

3 ......

10 

9n

91

93

94

25

no

97

31 

Total6 

7 

11 

12 ...._ 

13 

15 

16 

17 

18 

19 

20 

21 .... . 

22 

23 

24 

25 

26 

27 ----- 

28 ----- 

29 ----- 

30 

31 

Total

April

Mean

charge

(cfs)

90 

90 

78 

75 

72

71 

72 

74 

72 

68

65 

65 

74 

68 

66 

68 

69 

69 

106 

202

258 

160 

121 

82

74

85 

110 

104 

295 

598

3,501

Suspended sediment

Mean 

concentration 

(ppm)

1,420 

906 

581 

556 

600

622 

727 

938 

601 

614

511 

473 

621 

551 

342 

648 

593 

844 

13,800 

5,170

7,000 

2,910 

1,740 

872 

770

891 

2,100 

1,970 

6,450 

13,800

Tons 

per 

day

^345 

220 

122 

113 

117

119 

141 

187 

117 

113

90 

83 

124 

100 

61 

119 

110 

157 

s 9, 920 

s4,180

4,880 

1,260 

568 

193 

154

204 

624 

553 

815,400 

22,300

62, 674

July

62 

61 

57 

57 

58 

58 

58 

59 

59 

61

61 

59 

61 

61 

61

59 

58 

58 

58 

61

57 

349 

146 

90 

71 

71 

68 

66 

578 

207 

71

2,961

476 

768 

670 

858 

694 

697 

831 

949 

899 

714

800 

833 

815 

889 

948

589 

800 

706 

832 

876

1,790 

49,200 

33,900 

14,000 

2,000 

2,520 

893 

960 

56; 200 

13,600 

3,500

80 

126 

103 

132 

109

109 

130 

151 

143 

118

132 

133 

134 

146 

156

94 

125 

111 

130 

144

275 

i77, 700 

i!5,000 

3,400 

383 

483 

164 

171 

1111,000 

317,300 

671

229,053

May

Mean

charge 

(cfs)

337 

261 

232 

198 

229

248 

196 

158 

125 

85

77 

75 

75 

77 

267 

434 

196 

193 

187 

158

132 

148 

155 

150 

112

83 

69 

68 

68 

65 

64

4,922

Suspended sediment

Mean 

concentration 

(ppm)

7,000 

4,600 

2,670 

2,490 

3,900

4,250 

4,050 

2,800 

1,550 

914

«93 

632 

672 

899 

7,500 

10, 700 

3,620 

3,150 

2,560 

2,380

1,580 

2,000 

2,400 

2,400 

2,290

1,100 

723 

528 

610 

612 

615

Tons 

per 

day

6,370 

3,240 

1,670 

1,330 

2,410

2,850 

2,140 

1,190 

523 

210

144 

128 

136 

187 

813,100 

814,700 

1,920 

1,640 

1,290 

1,020

563 

799 

1,000 

972 

692

314' 

135 

97 

112 

107 

106

61,095

August

68 

72 

1,170 

3,230 

248

141 

99 

85 

80 

74

69 

68 

63 

61 

63

65 

65 

65 

60 

63

66 

66 

88 

86 

73 

68 

61 

62 

66 

1,580 

290

8,415

945 

866 

70, 800 

56,000 

21,200 

15,000 

4,680 

1,200 

1,310 

1,450

746 

723 

644 

673 

714

838 

434 

511 

469 

561

1,300 

902 

8,330 

11,500 

918 

606 

543 

525 

429 

61,400 

23, 500

174 

168 

s281,000 

s706,000 

814,400 

5,710 

1,250 

275 

283 

290

139 

133 

110 

111 

121

147 

76 

90 

76 

95

232 

161 

s2,790 

2,670 

181 

111 

89 

88 

76 

i297,000 

18,400

 1,332,446

June

Mean

charge

(cfs)

64 

65 

66 

66 

65

66 

66 

66 

64 

62

61 

61 

62 

61 

59 

58 

58 

59 

62 

62

61 

62 

62 

62 

61

62 

64 

64 

64 

62

1,877

Suspended sediment

Mean 

concentration 

(pom)

663 

602 

663 

671 

661

620 

561 

716 

537 

702

656 

545 

510 

609 

390 

456 

351 

445 

453 

367

343 

332 

328 

304 

285

324 

369 

534 

504 

758

Tons 

per 

day

115 

106 

118 

120 

116

110 

100 

128 

93 

118

108 

90 

85 

100 

62 

71 

55 

71 

76 

61

56 

56 

55 

51 

47

54 

64 

92 

87 

127

2,592

September

173 

124 

118 

103 

94

87 

85 

76 

72 

66

62 

66 

67 

67 

67

66 

67 

66 

66 

66

65 

65 

63 

65 

63 

65 

63 

293 

559 

152

3,111

12,500 

3,500 

1,810 

1,200 

806 

816 

845 

637 

629 

508

532 

391 

484 

1,750 

800

919 

715 

703 

608 

713

555 

618 

661 

457 

377 

766 

639 

19, 900 

36,700 

14,000

5,840 

1,170 

577 

334 

205

192 

194 

131 

122 

91

89 

70 

88 

317 

145

164 

129 

125 

108 

127

97 

108 

112 

80 

64 

134 

109 

s32,800 

s60,800 

5,750

110,272

Total discharge for year (cfs-days). 

Total load for year (tons)..........

50,381

1,965,267

s Computed by subdividing day.
VIRGIN RIVER BASIN Continued 

VIRGIN RIVER AT LITTLEFIELD, ARIZ. Continu

Particle-size analyses of suspended sediment, May to Septem

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; 

W, in distilled water; C, chemically dispersed; M, mechanica

Date of collection

July 22 ...............

Aug. 30 ...............

Time

8:00 a. m. 

8:00 a. m. 

4:30 p.m. 

8:00 a.m. 

8:00 a.m. 

8:00 a. m.

9:00 a. m. 

9:00 a. m. 

9:00 a. m. 

9:00 a. m. 

6:00 p.m. 

7:00 a. m.

5:00 p.m. 

7:30 p.m. 

7:00 a. m. 

7:00 a. m. 

6:00 a.m. 

12:00 m.

5:00 p.m. 

7:00 a.m. 

10:30 a. m. 

3:00 p.m. 

8:00 a.m. 

10:00 a.m. 

6:00 p.m.

Water 

discharge 

(cfs)

473 

473 

313 

190

65 

59

1,000 

1,000 

1,000 

1,000 

405 

350

1,440 

1,160 

245 

245 

1,260 

874

1,790 

8,970 

2,460 

1,220 

259 

1,720 

758

Suspended se

Concentration 

of sample 

(ppm)

12, 200 

12, 200 

5,260 

3,300 

576 

531

164,000 

164,000 

164,000 

164,000 

58,000 

47,700

82,800 

89,100 

30,000 

30,000 

73,800 

65,000

72, 500 

73,300 

72,100 

50,300 

22, 800 

86,700 

42.700

Concentration 

of suspension 

analyzed 

(ppm)

2,760 

1,960 

3,060 

6,120

2, 850 

3,250 

2,420 

2,810 

3,180 

2,780

4,580 

3,080 

4,110 

3,570 

3,620 

3,720

3,260 

3,660 

2,750 

4,870 

3,640 

2,360 

4.360

Percent fin

0.002

25 

26

45

26 

4 

28 

7

36 

38

0.004

37 

35 

47 

48

36 

9 

30 

10 

47 

41

33 

39 

53 

53 

31 

30

37 

35 

28 

54 

62 

43 

45

0.008

44 

45

54

48 

21 

53 

13

69 

70

0.016

53 

51 

65 

57

68 

64 

67

85 

82

61 

66 

81 

85 

50 

67

63 

59 

60 

81 

90 

70 

69
VIRGIN RIVER BASIN Continued 

VIRGIN RIVER AT LITTLEFIELD, ARIZ. Continued

Particle-size analyses of suspended sediment, May to September 19

(Methods of analysis: B, bottom withdrawal tube; D, decantation; P, pipette; 

W, in distilled water; C, chemically dispersed; M, mechanicall

Date of collection

Sept. 29 ................

Sent. 29 ...............

Time

1:00 p. m. 

7:00 a. m. 

9:00 a. m. 

1:00 p.m. 

1:00 p.m. 

1:00 p. m 

6:00 p. m.

Water 

discharge 

(cfs)

330 

480 

816 

670 

670 

670 

351

Suspended sed

Concentration 

of sample 

(ppm)

39, 600 

41, 500 

44,600 

53,300 

53,300 

53,300 

32. 100

Concentration 

of suspension 

analyzed 

(ppm)

5,600 

4,000 

3,660 

2,840 

2,830 

2,650 

3.520

Percent fine

0.002

27 

3 

30

0.004

59 

71 

50 

38 

9 

41 

49

0.008

55 

18 

55

0.016

88 

85 

67 

66 

55 

69 

82

0
VIRGIN RIVER BASIN Continued

MISCELLANEOUS ANALYSES OF STREAMS IN VIRGIN RIVER BASI

Chemical analyses, in parts per million, September 1950 to Septem

Date of collection

Mean 

discharge 

(cfs)

Temperature 

<°F)

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04)

Chloride 

(Cl)

Fluo* 

ride 

(F)

Nitrate 

(NO,)

FORT PIERCE WASH NEAR ST. GEORGE

July 18, 28, 29, 1951 24

1 fi

650 49 49 274

1 CO

1,590 23

30

.7 
COLORADO RIVER MAIN STEM Continued 

LAKE MEAD NEAR BOULDER CITY, NEV.

Chemical analyses, in parts per million, water year October 1950 to Sep

/The miles given below represent distances measured along the Colorado River downstream from the gaging station at Lees Ferry, Ari

the water/

Date of 

collection

Depth 

(feet)

Elevation 

(feet)

Temperature 

(°F)

Specific 

conductance 

(micromhos 

at 25°C)

Silica 

(SiOJ

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium and 

potassium 

(Na + K)

Bica

(H

AT LINE OF DEMARCATION BETWEEN TURBID AND CLEAR WA

Sept. 19, 1951 1,165 75.0 1,340 125 39 129 \ 

PIERCE FERRY BAY, MILE 279

Jan. 1, 1951 .......

Mar. 1 ............

Sept. 1 ............

5

5

5

5

5

5 79

1 0 on

1,040 --

DO

119

Q9

QQ

--

OO

--

1 1 ft

--

GRAND WASH, MILE 284.7

Sept. 18, 1951 ..... 

Sept. 18 ...........

Sept. 18 ...........

Sept. 18 ...........

5 

50 

100 

150

1,161 

1,116 

1,066 

1,016

81.8 

77.8 

70.4 

60.8

835 

1,030 

1,030 

1,050

9.6 

15

73 

94

25 

30

72 

91

ICEBERG CANYON, MILE 287

Sept. 19, 1951. .....

Sept. 19 ...........

5 

50 

100 

150 

175 

183

1,160 

1,115 

1,065 

1,015 

990 

982

80.5 

78.1 

70.0 

59.4 

58.5 

65.3

811 

1,090 

1,090 

1,070 

1,060 

1,300

11 

8.5

71 

89

24 

30

70 

110

SANDY POINT, MILE 293.5

S<!"t. 18 ...........

5 

 «)

1,161 ! 80.9 

1.11S ??.!

791 

1. 010

14 1 70 25 77 
Sept. 18 .......... 100 

150 

200 

244 

245

1,066 

1,016 

966 

922 

921

70.5 

59.8 

56.9 

55.6 

55.6

1,040 

1,030 

1,030 

1,040 

1,120

15 88 33 93

VIRGIN CANYON, MILE 305.3

Sept. 18, 1951.....

Sept. 18 ..........

Sept. 18 ..........

Sept. 18 ..........

Sept. 18 ..........

5 

50 

100 

150 

200 

250 

300 

320 

321.5

1,161 

1,116 

1,066 

1,016 

966 

916 

866 

846 

844

Sept. 20, 1951 .... 0 1,165

79.2 

78.8 

68.1 

59.3 

56.5 

54.9 

54.6 

56.0 

56.9

769 

899 

888 

944 

995 

916 

987 

989 

1,170

11 83 28 83

OVERTON ARM OF LAKE OPPOSITE SALT MINE, 15 MILES ABOVE MOUTH 

80 855 11 74 25 68 

OVERTON ARM OF LAKE, 9.3 MILES ABOVE MOUTH OF VIRGIN RIVER (LOWE

Sept. 20, 1951 .... 

Sept. 20 ..........

Sept. 20 ..........

Sept. 20 ..........

Sept. 20 ..........

5 

50 

100 

150 

200 

250 

265

1,160 

1,115 

1,065 

1,015 

965 

915 

900

79.7 

77.7 

67.9 

60.7 

56.2 

54.8 

54.6

690 

692 

800 

951 

958 

953 

937

14 

15

61 

83

23 

32

46 

95

BOULDER CANYON, MILE 335

Sept. 17, 1951..... 

Sept. 17 ..........

Sect. 17 .........

5 

50 

100

1,161 

1,116 

1.066

80.4 

78.6 

66.5

683 

865 

841

11

-:

" 47 
COLORADO RIVER MAIN STEM--Continued

LAKE MEAD NEAR BOULDER CITY, NEV. Continued

Chemical analyses, in parts per million, water year October 1950 to September 1

Date of 

collection

Depth 

(feet)

Elevation 

(feet)

Temperature

Specific 

conductance 

'micromhos 

at 25°C)

Silica 

(Si02)

Calcium 

(Ca)

BOULDER CANYON,

Sept. 17, 1951......

Sept. 17 ...........

Sept. 17 ...........

150 

200 

250 

300 

350 

400 

405

1,016 

966 

916 

866 

816 

766 

761

60.0 

55.7 

54.2 

54.0 

53.9 

53.9 

55.0

936 

965 

989 

994 

1,010 

997 

1,090

12 85

Magnesium 

(Mg)

Sodium and 

potassium 

(Na + K)

MILE 335 Continued

31 80

NEAR INTAKE TOWERS, MILE 354.7

Oct. 31, 1950 ......

Oct. 31 ...........

Oct. 31 ...........

Oct. 31 ...........

Oct. 31 ...........

Oct. 31 ...........

Nov. 29 ...........

Nov. 29 ...........

Nov. 29 ...........

Nov. 29 ...........

Nov. 29 ...........

Dec. 28 ...........

Dec. 28 ...........

Dec 38

5 

50 

100 

150 

200 

250 

300 

350 

400 

431 

432

5 

50 

100 

150 

200 

250 

300 

350 

400 

427 

429

5 

50

1,160 

1,115 

1,065 

1,015 

965 

915 

865 

815 

765 

734 

733

1,155 

1,110 

1,060 

1,010 

960 

910 

860 

810 

760 

733 

731

1,152 

1,107 

1,057

70.4 

70.6 

68.7 

61.6 

56.3 

53.5 

52.4 

51.9 

51.6 

51.6 

52.7

65.5 

65.2 

65.0 

64.0 

58.2 

53.5 

52.9 

52.2 

52.0 

51.8 

53.0

61.0 

61.0 

61.0

830 

822 

839 

896 

916 

956 

906 

940

959 

997

846 

845 

844 

885 

920 

979 

985 

1,010 

946 

946 

1,130

853 

851 

841

11

11

11 

11

13 

12

12

9.9 

15 

11

38

12 

36

11

71

82

87 

84

86 

88

70

76 

81 

85

84

80 

103

75

24

26

28 

26

28 

28

24

26 

25 

30

28

27 

35

25

75

75

89 

89

91 

90

78

78 

83 

89

97

87 

107

74

Bicarb

(HCO

1

1

1

1

1

1

2

3

4
Dec. 28 . ...

Dec. 28 ...........

Dec. 28 ...........

Dec. 28 ...........

Dec. 28 ...........

Dec. 28 ...........

Dec. 28 ...........

Dec. 28 .........'..

Feb. 8, 1951 .......

Feb. 8 ...........

Feb. 8 ...........

Feb. 8 ...........

Feb. 8 ...........

Feb. 8 ...........

Feb. 8 ...........

Feb. 8 ...........

Feb. 8 ............

Feb. 8 ...........

Feb. 28 ...........

Feb. 28 ...........

Feb. 28 ...........

Feb. 28 ...........

Feb. 28 ...........

Feb. 28 ...........

Feb. 28 ...........

Feb. 28 ............

Feb. 28 ...........

Feb. 28 ...........

Mar. 29 ...........

Mar. 29 ...........

Mar. 29 ...........

Mar. 29 ...........

150

200

300

400

4265

100

250

350

50

416

50

150

1,007

957

907

857

807

757

732

731

1,146

1,101

1,051

951

901

851

801

733

732

1,143

1,098

798

732

1,094

994

60.0

58.0

54.0

53.0

53.0

52.0

52.0

53.0

56.4

56.0

55.4

55.4

55.4

54.9

53.6

52.7

52.7

52.7

53.0

54.6

54.6

54.6

54.6

54.6

53.4

52.9

52.6

52.6

52.6

52.9

57.3

56.1

55.7

54.8

845

901

975

994

991

989

986

1,280

903

894

889

885

893

991

1,000

994

1,000

1,010

1,020

915

905

905

908

991

1,010

994

1,000

994

1,000

1,120

930

923

921

923

_

52

16

13

12

12

15

13

13

13

27

12

11

11

11

__

70

88

86_

79

87

88

80

__

85

90

105

100

79

79

81

82

_

29

28

29

.-

__

25

27

28

28_

26

28

29

__

33

28

29

30

29

29

__

88

95

92

__

,_

78

95

89

103

1-

74

77

91_

62

117

87

80

84

79

a Includes equivalent ot 8 parts per million of carbonate (CO,,).
COLORADO RIVER MAIN STEM Continued 

LAKE MEAD NEAR BOULDER CITY, NEV. Continued 

Chemical analyses, in parts per million, water year October 1950 to September 

Date of 

collection

Depth 

(feet)

Elevation 

(feet)

Temperature 

(°F)

Specific 

conductance 

(micromhos 

at 25°C)

Silica 

(Si02)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium and 

potassium 

(Na + K)

Bicar

(HC

NEAR INTAKE TOWERS, MILE 354.7 Continued

Mar. 29, 1951. ......

Mar. 29 ............

Mar. 29 ............

Mar. 29 ............

Mar. 29 ............

Mar. 29 ............

Mar. 29 ............

Apr. 26 ............

Apr. 26 ............

Apr. 26 ............

Apr. 26 ............

Apr. 26 ............

Apr. 26 ............

Apr. 26 ............

Apr. 26 ............

Aug. 2 ............

Aug. 2 ............

Aug. 2 ............

Aug. 2 ............

Aug. 31 ............

Aug. 31 ............

Aug. 31 ............

350

250

350

410

150

350

436

437.5

100

OQA

I n 09

892

792

732

53 7

CO A

CO O

57 9

CO A

CO 1

CO 1

01 O

C7 p

55 2

M l

CO -I

53.0

M O

59 5

975

989

ftOft

948

1 040

QC1

954

969

I

nnn

01 ft

QOQ

941

QQ.fi

941

QR9

1 040

ftftO

932

944

12

12

i

84

90

91

90

QI

oo

29

07

9ft

92

Qp

99

07

ftQ

Oft
Aug 31

Sept. 27 ............

Sept. 27 ............

Sept. 27 ............

Sept. 27 ............

Sept. 27 ............

Sept. 27 ............

4375

100

200

300

433

867

767

730

1,159

1,064

964

864

764

731

68.8

53.5

53.9

926

954

1,040

12

26

72

85

92

30

33

27

28

30

32

97

105

88

__

__

91

95

99
COLORADO RIVER MAIN STEM Continued 

COLORADO RIVER BELOW HOOVER DAM, ARIZ.-NEV.

LOCATION. At Hoover Dam, Arlz.-Nev. State line between Mohave County, Ariz., and Clark County, Nev., 

DRAINAGE AREA.--167,800 square miles.

RECORDS AVAILABLE. Chemical analyses: October 1939 to September 1951.

Water temperatures: October 1941 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 692 ppm Apr. 23-27, 30; minimum, 625 ppm Jan. 2-5, 8-1

Hardness: Maximum, 340 ppm July 2-3, 5, 9-10, 23-27, 30; minimum, 299 ppm Feb. 12-16, 19.

Specific conductance: Maximum daily, 1,020 micromhos Mar. 5; minimum daily, 910 micromhos Jan. 23. 

EXTREMES, 1939-51.--Dissolved solids (1939-44, 1950-51): Maximum, 824 ppm Mar. 1-10, 1941; minimum, 6

Hardness (1939-44, 1950-51): Maximum, 426 ppm Jan. 21-31, 1941; minimum, 299 ppm Feb. 12-16, 19, 19

Specific conductance: Maximum daily, 1,250 micromhos Mar. 2, 1941; minimum daily, 824 micromhos Nov

Water temperatures (1941-50): Maximum, 69°F Sept. 27, 1945 and several days in 1947 and 1948; minim

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduc

at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million, water year October 1950 to Sept

Date of collection

Oct. 2-6, 9-10, 1950

Oct. 11-13, 16-20 ..

Oct. 23-27, 30-31 ..

Nov. 1-3, 6-10 ....

Nov. 13-17, 20 ....

Nov. 21-22, 24, 27-30

Dec. 1,4-8 .......

Dec. 11-15, 18-20..

Dec. 21-22, 26-29..

Jan. 2-5, 8-10,1951 .

Jan. 11-12, 15-19 .

Jan. 22-26, 29-31 .

Feb. 1-2, 5-9 .....

Feb. 12-16, 19 ....

Feb. 20-21,23, 26-28

Mar. 1-2, 5-9 .....

Mar. 12-16, 19-20 .

Mar. 21-23, 26-30 .

Apr. 2-6, 9-10 ....

Apr. 11-13, 16-20 .

Apr. 23-27, 30.....

Mean 

discharge 

(cfs)

16,030

15,340

14,860

15,390

15,800

14,390

14,630

16,480

16,750

18,410

16,810

14,980

13,910

14, 500

17,650

16,630

15,140

15,320

14,890

15,380

13,700

Temperature

Silica 

(Si02)

13

13

14

13

13

13

12

12

12

14

12

13

12

12

12

12

12

12

12

12

13

Iron 

(Fe)

Calcium 

(Ca)

85

84

86

84

84

84

87

85

87

85

78

76

78

77

76

84

83

88

88

86

88

Magnesium 

(Mg)

28

28

29

28

28

26

26

26

26

26

27

27

26

26

27

27

27

_

Sodium 

(Na)

8!

85

Potassium 

(K)

80

84

84

89

87

87

8C

84

94

91

90

92

9f

9E

93

-

.

-

-

Bicarbonate 

(HCO,)

162

161

160

163

161

160

164

165

163

162

164

163

161

162

166

174

172

166

168

169

176

Sulfate 

(S04 )

263

266

265

264

265

264

235

261

265

261

265

256

257

261

264

266

265

269

264

267

268

Chloride 

(Cl)

69

70

69

69

69

72

72

71

71

68

70

68

68

68

71

74

72

72

73

76

75

Fluo^ 

ride 

(F)

Nitrate 

(NO,)

2.5

2.2

2.4

2.1

2.3

2.1

2.4

2.2

2.1

2.0

1.8

1.7

1.8

1.8

1.8

2.2

2.0

1.8

1.6

1.8

1.7

B

r

(
May 1-5 ...........

May 11-12, 15-18 ..

May 21-25, 28-29, 31

June 1, 4-8 .......

June 11-15, 18-20 . .

June 21-22, 25-29 . .

July 2-3, 5, 8-10...

July 11-13, 16-20 . .

July 23-27, 30 .....

Aug. 1, 3, 6-10 ...

Aug. 13-17, 20 ....

Aug. 21-24, 27-31 .

Sept. 4-7, 10 ......

Sept. 11-14, 17-20 .

Sept. 21, 24-28 ....

Weighted average .

16, 090

15, 850

15,650

13,180

12,740

12,740

13,560

14,280

14,730

15,270

16,980

16,980

17,280

17,790

15,280

a 15, 440

13

14

13

14

14

13

14

13

13

13

14

13

13

13

14

13

oo

OA

82

83

84

81

84

82

83

85

86

86

86

85

86

86

84

30

29

29

29

29

29

33

31

31

30

28

26

29

28

29

28

100

95

94

90

94

91

87

90

90

89

91

96

88

91

90

90

184

171

171

168

172

168

174

170

173

173

168

169

167

169

167

167

274

271

271

271

268

271

269

271

274

272

272

275

270

272

275

267

76

76

76

74

74

74

74

76

75

74

74

73

73

73

73

72

1.6

1.7

1.7

1.5

1.7

1.7

1.7

1.7

1.7

1.5

2.0

2.7

2.5

2.4

2.4

2.0

a Represents 77 percent of runoff for water year October 1950 to September 1951.
184 COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM Continued

COLORADO RIVER BELOW HOOVER DAM, ARIZ.-NEV. Continued 

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

..

55

55

55

55

55

--

56

56

56

56

55

56

55

55

55

55

_

55

56

56

60

56

56

56

Nov.

56

56

56

56

56

56

56

56

_

56

56

55

55

56

56

56

56

-.

56

_

60

56

56

56

Dec.

56

56

55

56

56

56

_-

56

56

56

56

56

_

56

56

56

56

56

._

57

57

57

57

Jan.

57

57

57

57

_

57

57

57

57

57

57

57

57

58

58

_

57

57

57

57

57

--

57

57

57

Feb.

57

57

__

_

57

57

57

57

57

~

..

56

57

57

57

57

_

__

57

57

57

56

_

~

56

56

55

_

~

Mar.

56

55

 _

__

55

55

55

55

55

--

56

56

55

55

55

_.

__

55

55

56

55

56

_

55

56

55

55

55

~

Apr.

_

55

55

55

55

55

55

55

55

55

55

_.

55

55

55

55

56

__

56

56

56

55

56

_

55

--

May

55

55

55

55

55

_

55

55

55

55

55

_

56

55

55

_.

"

55

55

55

55

55

..

55

56

56

June

56

_.

56

56

56

56

56

_.

56

56

56

56

56

__

_

56

56

56

56

56

__

56

56

56

56

56

_

~

July

_.

56

56

_

56

_ 

..

56

56

56

56

56

_

56

56

56

56

56

_

56

56

56

.56

56

_

56

Aug.

56

..

56

_

56

56

56

56

56

_

._

56

56

56

56

56

_.

56

56

56

56

60

~

80

56

56

56

56

Sept

_

._

56

56

56

56

_

56

56

56

56

56

--

_ 

56

56

56

56

56

-_

56

56

56

58

56

__

~
GILA RIVER BASIN

GILA RIVER AT.KELVIN, ARIZ.

LOCATION. Just above mouth of Mineral Creek, and 1,200 feet upstream from gaging station at Kelvin, Fi

19J miles upstream from Ashurst-Hayden Dam.

DRAINAGE AREA. 18,000 square miles, approximately, at gaging station, 

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951.

EXTREMES, 1950-1951. Dissolved solids: Maximum, 1,740 ppm June 1-10; minimum, 343 ppm Aug. 26-28. 

Hardness: Maximum, 1,070 ppm June 1-10; minimum, 180 ppm Sept. 6-12.

Specific conductance: Maximum daily, 2,460 micromhos Jan. 16; minimum daily, 554 micromhos Aug. 27. 

Water temperatures: Maximum observed, 94° July 30.

REMARKS. Records of specific conductance of daily samples available in district office at Albuquerque, 

of determined constituents. Records of discharge for water year October 1950 to September 1951 give

from Mineral Creek, between sampling point and gaging station, except during periods of heavy local 

Chemical analyses, in parts per million, December 1950 to Septembe

Date of collection

Dec. 1-10, 1950...

T\ftf 91 ^ 1

Jan. 1-10, 1951...

Mav 21-31 ........

Mean 

discharge 

(cfs)

6.97 

13.0 

12.2 

20.1 

69.9 

80.6

85.2 

87.8 

95.9 

103 

99.8 

110

121 

71.7 

195 

79.1 

55.3 

25.8 

5.15

Silica 

(Si02)

30 

28 

32 

30 

23 

23

28 

28 

28 

29 

30 

35

35 

28

30 

34 

34 

37

Iron 

(Fe)

0.00 

.01 

.01 

.02 

.01 

.01

.01 

.01 

.01 

.03 

.01 

.02

.01 

.01

.00 

.00 

.00 

.01

Calcium 

(Ca)

182 

144 

152 

144 

150 

147

152 

142 

136 

135 

132 

136

152 

118 

89 

115 

112 

126 

177

Magnesium 

(Mg)

46 

43 

38 

38 

49 

44

43 

41 

35 

36 

37 

37

40 

35 

20 

35 

36 

39 

47

Sodium 

(Na)

229 

226 

210 

219 

300 

267

245 

242 

238 

234 

252 

247

246 

278 

9 

282 

300 

308 

265

Potassium 

(K)

6.8 

7.6 

6.2 

6.0 

10 

8.6

7.0 

6.8 

9.2 

7.6 

6.0 

7.2

9.8 

7.4 

3 

10 

11 

10 

10

Bicarbonate 

(HCO,)

264 

255 

256 

264 

274 

270

264 

268 

262 

261 

263 

257

a 258 

247 

295 

233 

b224 

238 

c249

Sulfate 

(SO,)

554 

426 

461 

407 

368 

361

348 

311 

285 

272 

267 

315

356 

270 

121 

256 

273 

322 

495

Chloride 

(Cl)

256 

262 

228 

258 

438 

386

355 

350 

340 

345 

370 

350

350 

400 

97 

420 

435 

430 

345

Fluoride 

(F)

1.7 

1.7 

1.9 

1.9 

1.2 

1.3

1.1 

1.2 

1.4 

1.5 

1.5 

.9

.9 

.9

1.6 

1.6 

1.6 

1.3

Nitrate 

(NO,)

O.I 

.1 

1.7 

1.8 

2.7 

2.5

2.4 

1.5 

1.9 

1.8 

1.6 

2.0

2.1 

7.0 

1.6 

2.7 

2.0 

1.5 

1.4

Boron 

(B)

0.1 

.1 

.20 

.38 

.36 

.39

.59 

.32 

.14 

.40 

.36 

.89

.35 

.89

.34 

.36 

.43 

.38

D

Part

per 

million

1,4

1,2

1,2

1,2

1,4

1,3

1,3

1,2

1,2

1,1

1,2

1,2

1,3

1,2

5

1,2

1,3

1,3

1,5

a Includes equivalent of 7 parts per million of carbonate (CO,), 

b Includes equivalent of 6 parts per million of carbonate (CO,), 

c Includes equivalent of 5 parts per million of carbonate (CO,).
GILA RIVER BASIN Continued 

GILA RIVER AT KELVIN, ARIZ. Continued 

Chemical analyses, In parts per million, December 1950 to September 195

Date of collection

June 1-10, 1951 ... 

June 11-20........

July 1-3, 8-15..... 

July 16-20 ........

July 24-31 ........

Aug. 1-7. .........

Aug. 21-25, 29-31.

Sept. 1-5.. .......

Sept. 21-30.......

Weighted average

Mean 

discharge 

(cfs)

0.91 

.58 

.64 

56.6 

16.7 

118 

3.63 

66.0

1,134 

159 

237 

188 

1,198 

112 

253 

163 

20.0

e!07

Silica 

(SiO.)

43 

39 

42 

43 

41 

29 

32 

32

36 

46 

28 

28 

25 

28 

21 

24 

32

29

Iron 

(Fe)

0.01 

.01 

.03 

.17 

.01 

.17

1.9 

1.1

.24 

.22

.01 

.01 

.01 

.01

0.38

Calcium 

(Ca)

307 

295 

302 

107 

272 

195 

162 

115

106 

111 

137 

108 

60 

130 

54 

84 

161

113

Magnesium 

(Mg)

73 

70 

74 

28 

66 

25 

28 

21

23 

32 

30 

20 

11 

26 

11 

19 

37

27

Sodium 

(Na)

142 

136 

136 

121 

148 

94 

136 

58

100 

325 

180 

128 

A 

138 

103 

110 

174

160

Potassium 

(K)

7.0 

8.4 

6.6 

8.0 

5.4 

9.6 

17 

11

10 

18 

11 

9.6 

4 

5.8 

8.0 

6.4 

6.6

9.1

Bicarbonate 

(HCO,)

d317 

321 

303 

419 

306 

229 

247 

443

455 

227 

233 

254 

215 

236 

184 

204 

277

296

Sulfate 

(SO,)

814 

740 

807 

224 

704 

486 

368 

86

42 

232 

326 

208 

62 

284 

87 

177 

360

196

Chloride 

(Cl)

195 

200 

190 

55 

190 

75 

168 

41

121 

485 

229 

146 

34 

180 

122 

133 

230

211

Fluoride 

<F)

0.81 

.9 

.8 

1.0 

1.1 

0.5 

1.1 

.7

.7 

1.4 

1.0 

1.0 

.6 

1.0 

.9 

.9 

1.3

1.0

Nitrate 

(NO,)

2.2 

2.8 

1.8 

2.4 

2.2 

2.1 

2.5 

5.9

6.0 

6.4 

3.1 

2.4 

.8 

3.5 

1.8 

1.2 

1.2

3.2

Boron 

(B)

0.40 

.30 

.32 

.30 

.32 

.18

.10 

.12

.22 

.15

.19 

.32 

.28 

.20

0.28

D

Part

per 

million

1,7

1,6

1,7

7

1,5

1,0

1,0

5

6

1,3

1,0

7

3

9

5

6

1,1

. 8

d Includes equivalent of 11 parts per million of carbonate (CO3).

e Mean discharge for water year October 1950 to September 1951 was 90.9 cfs. Runoff Dec. 1, 1950 to Sept. 30, 1950 was 98 percen
GILA RIVER BASIN 187

GILA RIVER BASIN--Continued

GILA RIVER AT KELVIN, ARIZ.--Continued

Temperature (°F) of water, December 1950 to September 1951

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

Average

Oct. Nov. Dec.

_.

65

55

52

58

51

60

50

60

60

64

51

46

52

41

60

58

55

56

46

45

43

45

46

41

56

50

42

48

57

54

52

Jan.

52

45

50

42

45

45

46

47

45

49

49

48

47

46

47

51

51

43

47

45

49

51

50

59

50

57

52

43

53

55

51

49

Feb.

51

49

50

50

49

46

52

55

54

62

59

56

62

46

47

51

52

50

50

49

55

58

59

53

59

56

56

49

53

Mar.

48

49

47

51

49

61

57

59

60

69

67

64

60

65

51

69

64

59

64

55

71

57

71

67

70

67

62

69

55

59

60

61

Apr.

59

62

80

65

64

60

64

65

75

70

60

62

58

67

73

69

80

82

63

60

79

66

71

80

63

65

73

69

56

57

67

May

63

76

67

78

87

77

85

82

83

79

87

80

80

59

60

81

85

91

89

85

85

86

88

90

76

..

77

90

92

89

81

June

..

88

89

85

82

73

90

88

81

82

82

74

75

81

80

75

90

84

80

80

82

86

80

83

88

88

83

83

July

79

82

84

80

82

86

79

83

81

81

..

83

90

84

80

84

85

82

84

87

90

90

80

90

94

89

84

Aug.

88

90

76

76

89

87

88

88

90

89

86

89

87

84

82

85

86

87

82

81

87

86

77

86

..

73

73

75

84

85

84

Sept.

84

73

84

82

83

80

84

84

86

86

86

85

83

82

85

84

85

86

66

83

80

80

79

78

80

78

80

79

76

76

--

81
GILA RIVER BASIN Continued 

SALT RIVER AT STEWART MOUNTAIN DAM, ARIZ.

LOCATION. Just below dam, 3i miles above gaging station, which is 6 miles upstream from Verde River, M

DRAINAGE AREA.--6,218 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951. 

EXTREMES, 1950-51 Dissolved solids: Maximum, 1,300 ppm Aug. 21-28; minimum, 631 ppm Sept. 11-20.

Hardness: Maximum, 256 ppm Aug. 21-28; minimum, 151 ppm Aug. 29-31, Sept. 1-10.

Specific conductance: Maximum daily, 2,490 micromhos Aug. 20; minimum daily, 1,110 micromhos Sept. 

REMARKS. Records of specific conductance of daily samples available in district office at Albuquerque

due on evaporation. Records of discharge for water year October 1950 to September 1951 are given in 

point and gaging station except during periods of heavy rainfall.

Chemical analyses, in parts per million, December 1950 to Septem

Date of collection

Dec. 9-20, 1950.. 

Jan. 1-10, 1951.. 

Jan. 11-20 ......

Feb. 11-20......

Feb. 21-28......

Mar. 1-10. ......

Mar. 11-20......

Apr. 11-20......

May 1-10. .......

May 21-31. ......

June 1-10 .......

June 21-30 ......

July 1-10. .......

July 11-20. ......

July 21-31. ......

Mean 

discharge 

(cfs)

346 

155 

10.3 

11.1

11.1 

13.7 

166 

327 

928 

1,027

640 

2,360 

404 

254 

290 

640

1,081 

1,195 

1,452 

1,348 

1,676 

1.208

Silica 

(SiO,)

11 

13 

14 

14

14 

14 

12 

12 

11 

12

12 

10 

10 

14 

14 

12

12 

11 

11 

14 

25

Iron 

(Fe)

0.01 

.01 

.01 

.01

.01 

.00 

.01 

.00 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01

.01 

.00 

.00 

.00 

.00 

.00

Calcium 

(Ca)

53 

55 

59 

57

58 

58 

57 

56 

60 

62

60 

60 

60 

61 

61 

59

59 

59 

60 

59 

58 

48

Magnesium 

(Mg)

17 

17 

18 

19

20 

19 

17 

17 

19 

20

20 

20 

20 

21 

21 

20

20 

20 

21 

21 

22 

23

Sodium 

(Na)

196 

193 

199 

197

199 

208 

215 

216 

250 

282

296 

286 

284 

285 

281 

278

277 

282 

287 

294 

301 

321

Potassium 

(K)

5.0 

7.2 

7.0 

8.0

3.2 

6.8 

5.2 

5.8 

5.8 

6.2

6.6 

7.0 

6.6 

7.0 

6.4 

7.2

6.8 

6.8 

5.6 

6.8 

7.0 

7.8

Bicarbonate 

(HCO,)

167 

174 

183 

182

181 

183 

180 

179 

184 

192

195 

194 

195 

200 

196 

194

193 

191 

190 

191 

192 

177

Sulfate 

<SO«)

48 

49 

45 

49

59 

55 

52 

54 

58 

63

64 

63 

62 

64 

63 

62

63 

62 

63 

64 

66 

70

Chloride 

(Cl)

310 

310 

320 

320

320 

345 

350 

350 

405 

460

465 

455 

450 

455 

450 

450

445 

450 

450 

470 

475 

495

Fluoride 

<F)

0.4 

.4 

.3 

.3

.4 

.4 

.4 

.4 

.3 

.3

.3 

.3 

.4 

.4 

.3 

.3

.3 

.4 

.4 

.4 

.4 

.5

Nitrate 

(NOS)

3.1 

1.9 

2.1 

2.1

1.7 

2.8 

2.9 

2.8 

3.1 

2.7

1.7 

1.7 

1.6 

1.5 

1.6 

1.5

1.8 

1.6 

1.3 

1.3 

1.4 

4.4

Boron 

(B)

0.24 

.20 

.79

.54

.49 

.40 

.17 

.30 

.21 

.20

.20 

.26 

.20 

.28 

.20 

.20

.28 

.20 

.19 

.19 

.14 

.30

(

Par

pe

mil

lion

7

7

a 7

a 7

a 7

a 7

8

8

9

1,0

a 1,0

1,0

9

1,0

a 9

9

1,0

1,0

1,0

a 1,0

a 1,0

1.1

a Computed as sum of dissolved constituents.
Aug. 29-31, Sept. 

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

Sept. 21-30. .....

Weighted average

1,426

23.8

9.40

8.88

b612

20

18

21

18

.03

.01

0.01

39

44

58

00

13

16

21

380

168

194

297

8.0

8.0

6.9

180

112

118

133

187

78

44

45

46

65

600

270

275

308

472

. 5

.5

.5

.5

.5

0.4

1.6

2.3

2.7

3.2

4.9

2.1

.30

.32

.35

.24

.35

0.23

1,14

a 1,2

1,30

8

a63

7

1,05

a Computed as sum of dissolved constituents.

b Mean discharge for water year October 1950 to September 1951 was 564 cf s. Runoff for period Dec. 9-20, 1950, Jan. 1, 
190 COLORADO RIVER BASIN

GILA RIVER BASIN Continued 

SALT RIVER AT STEWART MOUNTAIN DAM, ARIZ.--Continued

Temperature (°F) of water, December 1950 to September 1951 

/Once-daily temperature measurement between 6 a. m. and 8:30 a. naj

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

Average

Oct. Nov. Dec.

_

_

_.

--

_

_

62

63

62

62

61

62

62

62

62

62

61

60

_

--

_

._

..

--

--

--

Jan.

_

_

._

--

_

50

55

55

55

54

54

54

54

53

66

56

56

56

57

56

56

55

56

56

56

55

55

_

55

Feb.

54

53

54

54

54

55

56

._

55

55

55

56

49

54

..

..

_

..

--

..

53

54

54

54

..

_

54

_

--

Mar.

54

54

54

55

54

55

55

55

55

55

55

_.

55

58

58

58

58

58

57

56

56

56

56

57

57

55

55

56

56

55

55

56

Apr.

57

56

61

62

57

51

57

57

57

57

57

58

58

58

58

57

57

57

57

56

56

56

56

57

57

58

58

56

56

58

--

57

May

58

59

59

60

60

59

59

59

60

60

60

60

60

60

59

62

59

60

61

61

61

62

_.

62

62

62

62

62

62

62

62

60

June

63

64

64

64

63

64

64

64

64

64

64

65

65

65

65

65

66

66

65

66

64

65

64

65

66

66

66

66

65

July

69

69

69

69

69

69

69

68

69

69

70

72

72

72

72

73

73

78

78

75

75

76

75

75

76

76

76

76

77

77

77

73

Aug.

77

77

77

78

77

77

77

77

78

79

79

80

80

81

81

81

81

81

80

79

79

80

81

84

83

84

84

82

82

80

Sept.

..

,-

-.

83

83

83

83

83

_-

--

_

77

--

..

.-

.-

--

..

._

78

78

78

77

77

--

--
GILA RIVER BASIN Continued 

VERDE RIVER BELOW BARTLETT DAM, ARIZ.

LOCATION. At gaging station 24 miles downstream from Bartlett Dam, Maricopa County, and 3i miles u

DRAINAGE AREA. 6,160 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 450 ppm July 11-20; minimum, 190 ppm Sept. 11-20.

Hardness: Maximum, 277 ppm Mar. 11-20; minimum, 120 ppm Sept. 1-10.

Specific conductance: Maximum daily, 725 micromhos June 28; minimum daily, 251 micromhos Sept. 1

Water temperatures: Maximum observed, 90°F July 18, Aug. 14.

REMARKS. Records of specific conductance of daily samples available in district office at Albuquerq

residue on evaporation. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million, December 1950 to Septe

Date of collection

Dec. 7-10, 1950..

Dec. 21-31......

Jan. 1-10, 1951.. 

Jan. 11-20 ......

Jan. 21-31 ......

Feb. 1-10..... ..

Feb. 11-20......

Feb. 21-28......

Mar. 1-10. ......

Mar. 11-20......

Mar. 21-31. .....

Apr. 1-10.... . ..

Apr. 11-20......

Apr. 21-30......

May 11-20. ......

May 21-31. ......

June 1-ia .......

June ll-2a ......

June 21-3a ......

July 11-20. ......

July 21-31 ......

Mean 

discharge 

(cfs)

26.5 

147 

396 

208 

206 

199

119 

258 

213 

282 

439 

214

88.9 

209 

210 

427 

338 

274

98.2 

84.6 

99.4 

123 

81.4 

78.8

Silica 

<Si02)

21 

22 

23 

22 

22 

22

20 

24 

24 

24 

24 

26

22 

24 

24 

26 

23 

24

29 

33 

26 

24 

27 

29

Iron 

(Fe)

0.02 

.01 

.02 

.01 

0 

.01

.01 

.01 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01

Calcium 

(Ca)

46 

44 

48 

43 

43 

43

47 

44 

48 

48 

50 

48

46 

44 

45 

42 

42 

44

45 

44 

42 

40 

40 

35

Magnesium 

(Mg)

39 

39 

38 

39 

38 

37

35 

38 

38 

35 

37 

35

36 

37 

37 

36 

30 

33

38 

39 

40 

40 

41 

38

Sodium 

(Na)

41 

40 

38 

39 

38 

37

35 

36 

35 

34 

32 

33

32 

33 

40 

40 

32 

36

47 

48 

51 

51 

48 

53

Potassium 

(K)

2.4 

3.0 

2.6 

6.2 

6.2 

5.2

5.6 

6.0 

6.8 

5.0 

6.0 

4.4

7.0 

4.2 

5.0 

3.5 

4.5 

3.0

5.2 

5.6 

6.0 

5.6 

6.0 

6.4

Bicarbonate 

(HCO,)

292 

287 

300 

271 

269 

267

261 

265 

279 

280 

287 

286

281 

268 

285 

247 

231 

267

263 

274 

266 

250 

250 

242

Carbonate 

(CO,)

0 

0 

0 

10 

10 

10

12 

11 

8 

6 

0 

0

0 

6 

0 

13 

10 

0

10 

6 

8 

10 

9 

0

Sulfate 

(S0«)

79 

80 

74 

73 

70 

67

67 

72 

73 

66 

69 

66

71 

73 

78 

76 

60 

70

91 

98 

102 

106 

107 

106

Chloride 

(CD

29 

31 

28 

27 

27 

25

24 

28 

27 

25 

27 

25

25 

24 

27 

28 

22 

25

30 

33 

35 

37 

38 

37

Fluoride 

(F)

0.2 

.3 

.4 

.3 

.2 

.3

.3 

.3 

.3 

.3 

.3 

.3

.3 

.3 

.3 

.4 

.3 

.3

.3 

.2 

.4 

.4 

.4 

.5

Nitrate 

(NO,)

2.2 

1.3 

1.2 

.4 

.3 

.3

.6 

1.3 

1.0 

.6 

1.3 

.9

.9 

1.0 

.8 

.9 

1.0 

1.0

1.5 

1.2 

.6 

.8 

.9 

1.3

Bo

ron 

(B)

0.3 

.25 

.42 

.27 

.13 

.19

.15 

.27 

.44 

.37 

.34 

.17

.17 

.52 

.08 

.25 

.21 

.22

.26 

.27 

.32 

.38 

.27 

.18

a Computed as sum of dissolved constituents.
GILA RIVER BASIN Continued

VERDE RIVER BELOW BARTLETT DAM, ARIZ.--Conti

Chemical analyses, in parts per million, December 1950 to Septembe

Date of collection

Aug. 1-10, 1951 .

Sept. 1-10...... .

Sept. 21-30. .....

Weighted average

Mean 

discharge 

(cfs)

81.0

126

498

819

b275

Silica

(sicg

33

33

20

22

23

Iron 

(Fe)

0.03

.02

.04

.03

0.02

Calcium 

(Ca)

39

30

34

40

Magnesium 

(Mg)

36

11

14

27

Sodium 

(Na)

48

14

12

28

Potassium 

(K)

7.0

4.5

4.2

4.9

Bicarbonate 

(HCO,)

235

134

162

231

Carbonate 

(CO,)

10

0

0

..

Sulfate 

(S04)

96

25

27

56

Chloride 

(Cl)

30

29

8.0

8.5

20

Fluoride 

(F)

0.6

.4

.6

.4

0.4

Nitrate 

(NO,)

1.3

5.6

3 1

1.0

1.7

B

ro

(B

0.2

.2

.0

.0

0.2

a Computed as sum of dissolved constituents.

b Mean discharge for water year October 1950 to September 1951 was 256 cfs. Runoff for period December 7, 1950 to 
GILA RIVER BASIN 193

GILA RIVER BASIN Continued 

VERDE RIVER BELOW BARTLETT DAM, ARIZ . Continued

Temperature (°F) of water, December 1950 to September 1951 

/Once-daily temperature measurement generally between 3 p. m. and 4 p. mj

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

Average

Oct. Nov. Dec.

--

_

54

a45

58

57

a 47

45

57

55

56

a50

55

54

55

54

52

54

58

54

60

54

59

50

49

48

Jan.

50

50

50

54

48

50

50

54

48

49

54

59

47

47

51

50

51

54

50

50

51

50

49

55

50

55

54

55

51

49

49

51

Feb.

66

55

56

60

59

62

60

62

55

69

68

55

57

55

59

54

55

53

55

56

55

55

53

54

54

55

54

55

--

57

Mar.

53

55

55

53

54

55

56

54

55

55

56

56

58

50

52

57

55

64

64

56

58

61

62

63

63

61

60

64

61

65

60

58

Apr.

58

_

62

63

65

65

66

67

70

65

70

69

38

57

57

55

57

67

65

65

69

70

70

69

65

67

_

69

64

62

--

64

May

64

66

68

69

68

67

70

70

65

65

64

59

54

66

62

65

67

68

72

71

71

72

75

68

74

68

70

72

68

68

78

68

June

79

78

78

78

78

78

75

80

80

85

85

85

86

79

79

80

82

81

84

79

81

80

80

78

79

80

84

82

81

84

81

July

84

84

85

81

80

82

83

81

85

80

85

86

87

86

87

87

87

90

88

88

84

86

83

84

82

87

86

85

86

87

86

85

Aug.

85

a87

84

80

C7

86

a 80

86

88

86

86

86

90

89

89

b81

b80

b80

b82

b79

b80

86

b80

b81

b81

b77

73

b72

b68

82

Sept.

_

80

85

80

78

80

81

80

78

72

75

72

70

70

74

81

84

79

80

78

78

75

80

82

82

84

78

78

80

78

L Measured between 8 a. m. and 10 a. m. 

b Measured before 8 a. m.
GILA RIVER BASIN Continued 

AGUA FRIA RIVER BELOW LAKE PLEASANT DAM, ARIZ

LOCATION. At water-stage recorder on canal 1J miles downstream from Lake Pleasant Dam on Agua Fria Ri

miles upstream from New River.

DRAINAGE AREA. 1,460 square miles approximately (above Lake Pleasant Dam).

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

REMARKS. Records of specific conductance of daily samples available in district office at Albuquerque

due on evaporation. Samples for which no discharge is shown were collected at surface of the lake 

during period was Aug. 24-27. There was no spill over dam. Records of discharge for water year Oc

Branch, Tucson District. Records of inflow to Lake Pleasant are published as Agua Fria River at La

Chemical analyses, in parts per million, December 1950 to Septem

Date of collection

Dec. 8, 14, 21, 29,

1950. ...........

Jan. 5, 12, 19, 1951

Feb. 9, 16, 23 ....

Mar. 2, 9, 16, 23,

30. .............

Apr. 6, 10, 20, 27 .

May 4, 11, 18, 25. .

June 1, 8, 15, 29...

July 6, 13, 20, 27. .

Aug. 3, 10-11. ....

Aug. 24-27.......

Sept. 7, 14, 21, 28.

Mean 

discharge 

(els)

57.0

Silica 

(SiO.)

12

11

8.8

9 2

9^3

8.5

7.4

13

13

12

29

Iron 

(Fe)

0.15

.01

.01

.03

.21

.16

.05

OR 

. <S3

.07

Calcium 

(Ca)

73

81

44

44

58

64

70

70

41

35

31

Magnesium 

(Mg)

43

44

20

22

26

32

35

39

12

9 0

5.5

Sodium 

(Na)

136

137

51

63

75

81

98

106

28

1 ^ 

10

10

Potassium 

(K)

8.0

6.4

5.2

5

O

. 0

7.0

6.4

7.0

8. 2

4.8

3. 6

3.2

Bicarbonate 

(HCO,)

386

401

137

163

220

267

300

309

179

149

b!13

Sulfate 

(SOJ

95

97

99

98

107

119

134

144

32

16

20

Chloride 

(Cl)

169

174

65

77

88

96

116

116

25

14

5

Fluoride 

(F)

0.3

.3

.3

9

.3

.4

.4

.8

.6

g

.6

Nitrate 

(NO,)

1.1

2.9

5.9

1.7

1.4

.6

.1

.5

.8

.9

2.3

Boron 

(B)

0.35

.32

.65

20

!20

.33

.28

.42

a.l

.05

a .1

(

Pa

pe

mi

lio

a Reported boron concentration is less than figure indicated, 

b Includes equivalent of 6 parts per million of carbonate (CQ3).
GILA RIVER BASIN Continued 

GILA RIVER BELOW GILLESPIE DAM, ARIZ.

LOCATION. About 1 mile below gaging station on Gila Bend Canal which is 200 feet below Gillespie Dam

River. Gila Bend Canal diverts from left bank and Enterprise Canal diverts from right bank at Gil

DRAINAGE AREA. 49,800 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951.

EXTREMES, 1950-51. Dissolved solids: Maximum, 6,000 ppm Sept. 21-30; minimum, 262 ppm Sept. 1. 

Hardness: Maximum, 1,810 ppm Sept. 21-30; minimum, 135 ppm Sept. 1

Specific conductance: Maximum daily, 9,580 micromhos Sept. 30; minimum daily, 420 micromhos Sept. 

Water temperatures: Maximum observed, 95°F July 19.

REMARKS.--Records of specific conductance of daily samples available in district office a^ Albuquerque

sums of determined constituents. Samples from canal are believed to be representative of total fl

verted into Gillespie and Enterprise canals. Record of separate and combined discharge for the ri

1951 given in Water-Supply Paper 1213.

Chemical analyses, in parts per million, December 1950 to Septemb

Date of collection

Dec. 1-iO, 1950.. 

Dec. 11-20. ......

Jan. 1-10, 1951 . . 

Jan. 11-20.... ...

Jan. 21-30.......

Feb. 5-10 .......

Feb. 21-28.......

Mar. 11-20 .. ...

Mar. 21-27, 29-31

Apr. 11-20. ......

Apr. 21-30 ......

May 11-20 ......

May 21-31 .......

Mean 

discharge 

(cfs)

39.9 

44.9 

44.6 

51.5 

56.5 

64.7 

370

147 

83.7 

68.0 

63.6 

60.4 

56.3 

58.6 

94

52.5 

52.8 

49.8 

46.0 

43.0 

35.7

Silica 

(SiO,)

32 

30 

30 

32 

28 

29 

16

20 

28 

34 

32 

34 

33 

29 

27

30 

32 

37 

33 

37 

39

Iron 

(Fe)

0.02 

.02 

.02 

.01 

.01 

.01

.01 

0 

0 

0 

0 

0

.01 

.00 

.00 

.01 

.01 

.02

Calcium 

(Ca)

386 

382 

372 

380 

356 

366 

156

198 

352 

367 

365 

359 

369 

360 

202

384 

378 

376 

386 

378 

368

Magnesium 

(Mg)

153 

156 

152 

170 

161 

164 

45

86 

152 

157 

156 

156 

154 

151 

80

156 

156 

156 

156 

156 

155

Sodium 

(Na)

1,400 

1,390 

1,370 

1,410 

1,330 

1,350 

388

684 

1,290 

1,300 

1,310 

1,330 

1,330 

1,320 

7

1,380 

1,380 

1,370 

1,360 

1,390 

1,390

Potassium 

<K)

3.0 

1.4 

1.6 

7.6 

7.6 

7.2

7.2 

9.4 

5.2 

6.0 

6.0 

3.6 

5.2 

10

9.2 

9.0 

7.0 

9.2 

6.8 

7.0

Bicarbonate 

(HCO,)

403 

401 

367 

394 

378 

386 

218

236 

375 

384 

379 

369 

328 

365 

225

388 

382 

384 

372 

367 

339

Sulfate 

(SO,)

1,150 

1,150 

1,140 

1,170 

1,100 

1,120 

356

562 

1,040 

1,090 

1,100 

1,060 

1,110 

1,080 

592

1,130 

1,110 

1,120 

1,130 

1,150 

1,140

Chloride 

(Cl)

2,230 

2,200 

2,190 

2,190 

2,070 

2,120 

630

1,070 

1,990 

2,060 

2,110 

2,150 

2,170 

2,120 

1,100

2,160 

2,160 

2,130 

2,170 

2,160 

2,150

Fluoride 

(F)

1.6 

2.4 

2.4 

2.4 

2.2 

2.2

1.2 

2.0 

2.4 

2.4 

2.4 

2.4 

2.4 

1.2

2.2 

2.2 

2.2 

2.2 

2.6 

2.4

Nitrate 

(NO,)

40 

39 

39 

41 

42 

43 

2.2

27 

40 

40 

54 

44 

47 

40 

26

22 

24 

21 

22 

24 

23

Boron 

(B)

2.8 

3.1 

2.8 

2.4 

2.5 

2.3 

1.0

1.2 

2.3 

2.9 

3.3 

3.2 

3.4 

3.0

2.5 

2.6 

2.5 

2.5 

2.6 

2.5

Pa

pe

mi

lio

5,

5,5

5,4

5,6

5,2

5,3

1,7

2,7

5,0

5,2

5,3

5,3

5,3

5,2

2,8

5,4

5,4

5,4

5,4

5,4

5,4
GILA RIVER BASIN Continued

GILA RIVER BELOW GILLESPIE DAM. ARIZ. Continue

Chemical analyses, In parts per million, December 1950 to September 19

Date of collection

June 1-10, 1951.

July 21-27, Aug. 2

Aug. 11-15, 18-26 

Aug. 16, 17 ....

Aug. 28-31 .....

Sept. 11-20..... 

Sept. 21-30 ....

Weighted average

Mean 

discharge 

(cfs)

29.8 

23.3 

18.0 

17.7 

21.8 

29.9 

457

207 

2,075 

734 

86.7 

176 

586 

8,500

4,640 

2,540 

507 

248 

174 

100

d231

Silica 

(SiO,)

27 

28 

23 

24 

33 

59 

72

95 

52 

37 

31 

23 

30 

14

20 

23 

25 

34 

39 

36

25

Iron 

(Fe)

0.01 

.01 

.01 

.01 

.01 

.01 

.01

0 

.01 

.02 

.02 

0 

0 

.02

.01 

.01 

.01

0.02

Calcium 

(Ca)

360 

356 

350 

356 

346 

310 

130

130 

59 

62 

376 

164 

101 

55

41 

42 

167 

408 

408 

402

135

Magnesium 

(Mg)

163 

159 

157 

156 

156 

130 

36

46 

11 

13 

153 

63 

26 

9.2

7.9 

9.6 

58 

181 

185 

196

48

Sodium 

(Na)

1,370 

1,360 

1,380 

1,380 

1,400 

1,150 

319

437 

85 

224 

1,290 

511 

178 

77

! 

137 

526 

1,410 

1,440 

1,510

407

Potassium 

(K)

6.6 

8.2 

6.0 

7.4 

7.8 

4.8 

9.6

9.6 

8.8 

6.0 

6.8 

8.8 

8.8 

5.6

9

8.5 

5.6 

9.2 

7.6

6.4

Bicarbonate 

(HCO,)

336 

330 

313 

314 

297 

262 

a 235

b252 

c!89 

235 

350 

202 

298 

158

167 

180 

300 

424 

379 

348

221

Sulfate 

(SO,)

1,130 

1,120 

1,140 

1,160 

1,140 

988 

290

403 

67 

200 

1,090 

420 

108 

70

39 

121 

403 

1,060 

1,100 

1,190

336

Chloride 

(Cl)

2,160 

2,150 

2,190 

2,180 

2,190 

1,840 

480

600 

110 

215 

2,080 

815 

280 

105

27 

115 

790 

2,320 

2,390 

2,450

620

Fluoride 

(F)

2.2 

2.2 

2.2 

2.2 

2.2 

2.0 

1.2

1.4 

.8 

1.0 

1.8 

1.0 

.6 

.6

1.4 

1.8 

2.0 

2.2

1.1

Nitrate 

(NOS )

48 

42 

36 

44 

31 

23 

5.8

14 

.5 

3.0 

24 

8.3 

1.4 

3.0

6.0 

6.1 

12 

26 

28 

37

11

Boron 

(B)

3.2 

2.7 

2.8 

2.9 

3.0 

2.5 

1.0

.75 

2.4

.75 

.32

2.4 

2.8 

3.0

-

D

Parts 

per 

million

5,43

5,39

5,44

5,46

5,45

4,64

1,46

1,86

48

87

5,22

2,11

88

41

26

54

2,14

5,66

5,79

6,00

1,70

a Includes equivalent of 18 parts per million of carbonate (CO,).

b Includes equivalent of 26 parts per million of carbonate (CO,).

c Includes equivalent of 7 parts per million of carbonate (CO,).

d Runoff for period Dec. 1, 1950 to Sept. 30, 1951 was 97 percent of total for water year.
GILA RIVER BASIN 197

GILA RIVER BASIN Continued 

GILA RIVER BELOW GILLESPIE DAM, ARIZ. Continued

Temperature (°F) of water, December 1950 to September 1951 

/Once-daily temperature measurement at approximately 8 a. m. 7

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

Average

Oct. Nov. Dec.

50

53

53

54

53

52

50

51

50

53

53

53

52

53

54

53

52

52

53

51

50

50

50

49

48

36

36

36

36

38

48

49

Jan.

35

36

40

43

45

44

46

45

45

46

45

52

43

45

46

46

49

49

49

51

51

51

52

54

55

54

55

55

57

57

47

48

Feb.

48

45

47

49

52

54

57

57

58

59

59

59

57

55

54

54

57

57

56

56

56

56

56

59

57

55

56

52

55

Mar.

53

54

50

50

52

55

56

58

60

60

60

60

56

56

57

60

61

55

60

55

57

58

60

60

62

62

60

61

59

61

60

58

Apr.

62

62

60

64

60

61

65

64

65

66

63

63

64

64

65

67

67

67

68

56

65

67

67

66

67

65

65

68

62

50

64

May

53

56

64

65

66

68

72

75

70

71

70

68

68

60

60

64

65

78

72

73

72

70

70

71

74

75

78

75

76

76

74

69

June

69

67

68

69

70

68

70

72

70

72

71

72

73

72

72

75

74

74

76

77

75

72

74

72

75

75

75

75

75

80

73

July

80

80

80

80

78

81

81

82

82

80

80

80

82

85

85

86

85

85

a95

85

85

85

85

85

85

83

85

80

81

85

85

83

Aug.

85

85

83

78

80

80

81

80

81

80

79

80

83

83

80

80

83

84

83

83

83

80

80

80

75

79

80

80

80

80

80

81

Sept.

76

76

75

75

77

78

77

77

76

76

76

76

76

76

76

76

76

76

76

76

81

81

76

75

78

76

71

72

75

74

--

76

a Temperature reading made at 3:30 p. m.
DIVERSIONS AND RETURN FLOWSAT AND BELOW IMPERIAL D

YUMA MAIN CANAL BELOW COLORADO RIVER SIPHON, AT YUMA, 

LOCATION.--At gaging station on Yuma Main Canal below Colorado River siphon at Yuma, Yuma County, on Ar

highway bridge over Colorado-River at Yuma, and 3 miles downstream from siphon drop power plant. 

DRAINAGE AREA. 242,900 square miles, including all closed basins within drainage boundary. 

RECORDS AVAILABLE.--Chemical analyses: September 1926 to September 1928, October 1942 to September 195

EXTREMES, 1950-51 . Dissolved solids: Maximum, 735 ppm May 21-25, 28-29, 31; minimum, 650 ppm Sept. 3-

Hardness: Maximum, 350 ppm May 1-4, 7-10; minimum, 303 ppm Sept. 3-7, 10.

Specific conductance: Maximum daily, 1,090 micromhos on several days during May to August; minimum d

EXTREMES, 1926-28, 1942-51 . Dissolved solids: Maximum, 1,300 ppm Jan. 11-20, 1927; minimum, 285 ppm J

Hardness: Maximum, 567 ppm Oct. 21-31, 1926; minimum, 163 ppm June 11-20, 1928.

Specific conductance (1943-51): Maximum daily, 1,150 micromhos on several days in May and June 1944 

REMARKS. Samples collected prior to February 1943 were from gaging station on the Colorado River at Yu

evaporation. Records of specific conductance of daily samples available in district office at Salt 

October 1950 to September 1951 given in Water-Supply Paper 1213.

Chemical analyses, in parts per million, water year October 1950 to Sep

Date of collection

Oct. 2-6, 9-10, 

1950 ..........

Oct. 11-13, 16-20 

Oct. 23-27, 30-31 

Nov. 1-3, 6-10. . 

Nov. 11, 13-16,20 

Nov. 21-22, 24, 

27-30. .........

Dec. 1, 4-8..... 

Dec. 11-15, 

18-20... .......

Dec. 21-22, 

25-29. .........

Jan. 1-6, 9-10, 

1951 ..........

Jan. 11-12, 

15-19. .........

Jan. 22-26, 

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

Feb. 1-2, 5-9... 

Feb. 15-16, 

19-21 .........

Feb. 22-23, 

26-28 .........

Mar. 1-2, 5-9...

Mean 

discharge 

(cfs)

617 

661 

627 

580 

536

487 

361 

400 

324 

347 

282 

449 

596 

554

583 

535

Silica 

(Si02)

14 

14 

12 

13 

17

15 

13 

13 

13 

13 

14 

13 

13 

14

15 

13

Iron 

(Fe)

0.02 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.06 

.05 

.05 

.06 

.08 

.07

.09

Calcium 

(Ca)

82 

82 

82 

84 

86

85 

86 

88 

86 

87 

88 

86 

88 

92

87

Magnesium 

(Mg)

26 

26 

27 

26 

27

27 

27 

27 

28 

28 

28 

29 

26 

27

27 

29

Sodium 

(Na)

93 

95 

97 

98 

98

95 

97 

97 

97 

98 

96 

99 

98 

100

99 

99

Potassium 

(K)

6.0 

6.8 

5.6 

4.8 

4.0

4.4 

5.2 

5.2 

5.6 

4.0 

4.4 

5.6 

8.2 

6.2

8.0 

3.6

Bicarbonate 

(HCOS)

165 

165 

170 

170 

169

171 

178 

171 

172 

170 

173 

175 

174 

176

177 

175

Sulfate 

(S04 )

268 

273 

274 

272 

277

274 

276 

279 

278 

280 

278 

277 

277 

283

287 

281

Chloride 

(Cl)

80 

81 

84 

83 

84

83 

83 

84 

85 

84 

85 

85 

88 

88

92 

85

Fluoi 

ride 

(F)

0.2 

.2 

.2 

.2 

.2

.2 

.2 

.2 

.4 

.4 

.4 

.4 

.2 

.2

.2 

.3

Nitrate 

(NO,)

0.9 

.7 

.8 

.8 

1.2

1.0 

1.0 

.8 

1.3 

1.3 

1.2 

1.3 

.9 

1.1

.9 

1.4

Boron 

(B)

Pa

p

m

lio
DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL DAM 199

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MI ^y^i: nyis s^y

1

1

go

00

1

0

o

§

o

p

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0

ts

s

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s

oo

o

0

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7Represents a 
PART 10. THE GREAT BASIN

SEVIER LAKE BASIN 

SEVIER RIVER NEAR LYNNDYL, UTAH

LOCATION. At bridge on State Highway 125, li miles upstream from gaging station, which is 3i miles s

DRAINAGE AREA. 6,270 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951. Dissolved solids: Maximum, 2,040 ppm Sept. 21-30; minimum, 1,490 

Hardness: Maximum, 702 ppm Sept. 21-30; minimum, 598 ppm Apr. 21-30.

Specific conductance: Maximum daily, 3,710 micromhos Sept. 24; minimum daily, 1,510 micromhos Apr. 

Kater temperatures: Maxt-uun, 80°F July 30-31. 

REMARKS. Values reported for dissolved solids are sums of determined constituents. Records of speci

office at Salt Lake City, Utah. Records of discharge for water year October 1950 to September 195

Chemical analyses, In parts per million, March to September 

Date of collection

Mar. 22-31, 1951

Apr. 11-17,19-20

Apr. 21-30. ....

Ma-, 11-20 .....

June 11-20 .....

June 21-30 .....

Aug. 11-20.....

Aug. 21-31.....

Sept. 11-20.....

Sept. 21-30.....

Weighted average

Mean 

discharge 

(cfs)

46.1

49.8

96.3

395

505

468

318

442

606

557

174

162

291

276

212

187

125

b256

Silica 

(Si02)

20

17

21

29

29

28

27

29

26

25

25

27

26

27

26

25

21

27

Iron 

(Fe)

0.03

.04

.05

--

-

.Ob

.05

.05

.02

.02

.03

.04

.05

.08

.03

.09

0.04

Calcium 

(Ca)

105

102

98

88

90

88

84

84

83

82

81

84

76

81

80

80

90

85

Magnesium 

(Mg)

96

95

96

92

95

96

96

96

99

101

104

106

107

102

108

111

116

100

Sodium 

(Na)

279

289

296

340

369

357

359

352

377

387

390

409

422

430

437

467

461

381

Potassium 

(K)

8.8

11

16

-

10

10

10

10

12

8.0

12

12

12

12

14

12

11

Bicarbonate 

(HCO,)

324

312

311

314

323

308

298

292

294

294

288

282

288

294

296

306

322

301

Sulfate 

<SO«)

370

372

383

423

442

441

433

439

462

471

473

502

499

500

509

516

519

461

Chloride 

(CD

450

455

460

465

490

485

490

495

515

538

550

582

588

590

610

635

660

527

Fluoride 

(F)

0.0

.0

.1

-

.4

.4

.4

.4

.4

.4

.2

.2

.2

.2

.3

.3

0.3

Nitrate 

(NO,)

2.4

1.8

3.9

10

9.7

16

16

16

16

16

14

5.2

5.6

5.4

5.3

4.8

5.4

12

Boron 

(B)

Pa

p

m

li

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

1,

2,

2,

1,

a Not included for computation of weighted averages.

b Represents 75 percent of runoff for water year October 1950 to September 1951
SEVIER LAKE BASIN 201

SEVIER LAKE BASIN Continued 

SEVIER RIVER NEAR LYNNDYL, UTAH--Continued 

Temperature (°F) ot water, March to September 1951

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

_.

_

__

._

--

..

__

__

_

_

._

_.

--

..

__

._

_.

51

52

52

--

61

54

58

58

53

50

--

Apr.

63

63

56

56

61

59

59

66

66

58

62

67

64

66

66

66

__

65

76

60

59

59

61

59

55

54

60

54

53

48

--

61

May

51

53

60

59

59

61

61

54

_

62

61

58

52

52

52

64

64

64

64

62

61

62

68

68

54

76

74

68

66

65

63

61

June

61

58

64

65

63

66

66

66

66

64

68

68

69

73

75

73

72

72

71

64

69

74

75

75

75

71

71

71

70

--

69

July

70

72

72

72

72

72

74

73

71

74

74

74

71

71

71

72

78

78

78

78

75

75

76

79

76

76

78

78

79

80

80

75

Aug.

76

76

74

74

75

74

79

79

79

75

75

74

76

76

74

77

77

74

74

74

72

72

72

72

74

71

70

64

66

67

71

74

Sept.

71

71

71

71

71

71

70

71

71

71

65

65

67

68

69

69

69

70

70

68

65

65

68

57

57

57

_

66

66

--

68
SALTON SEA BASIN

MISCELLANEOUS ANALYSES OF STREAMS IN SALTON SEA BASIN MJ 

Chemical analyses, in parts per million, water year October 1950 toi Sep

Date of collection

Mean 

discharge 

(cfs)a

Temperature 

(°F)

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04 )

Chloride 

(Cl)

Fluo* 

ride 

(F)

Nitrate 

(NO,)

B

ro

(B

ALAMO RIVER NEAR CALIPATRIA

Oct. 11, 1950... ....

Nov. 16 ............

Dec. 21 ............

Feb. 27 ............

Mar. 16.... ........

May 25.... .........

July 12 .............

Oct. 18. ............

928

689.2

737.3

768.1

875.5

780.4

1,083.1

55

60

72

14

146

]AK

142

85

75

73

79

170

374

200

194

505

547

499

600

480

428

5.9

2.1

NEW RIVER NEAR WESTMORELAND

Oct. 11, 1950... ....

Nov. 16 ............

Dec. 21 ............

Jan. 29, 1951 ......

Feb. 27 ............

Mar. 16 ............

May 25. ............

Aug. 9 .............

Sept. 6 ............

Oct. 18. ............

570.5

595.4

600.0

464.0

JTKO

535.9

669.7

78

50

79

72

19

15

14

EC

211

1 A 1)

203

435

436 540

8 

A

3

C

a Discharge measurements by U. S. Bureau of Reclamation, 

b Determined by Schwarzenbach method.
HUMBOLDT RIVER BASIN

MISCELLANEOUS ANALYSES OF STREAMS IN HUMBOLDT *>',&«. BASi« 

Chemical analyses, in parts per million, water year October 1950 to Sep

Date of collection

Mean 

discharge 

(cfs)

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04 )

Chloric^ 

(CD

Fluo* 

ride 

(F)

Nitrate 

(NO,)

Boron 

(B)

P

p

m

l

HUMBOLDT RIVER NEAR DEETH

Jan. 20, 1951.... 

Apr. 6 ..........

Jan. 20, 1951 .... 

Apr. 6 ..........

40 48 19 57 253 

224

83 

50

19 

19

0.3 

MARY'S RIVER NEAR DEETH

42 34 10 37 218 

146

17 

11

7 

5.0

0.5 

HUMBOLDT RIVER AT ELKO

Jan. 20, 1951.... 

Apr. 6 ..........

74 

602

32 

38

50 

34

13 

8.6

42 

32

255 

186

41 

23

12 

10

0.4 

.2

HUMBOLDT RIVER AT PALISADE

Jan. 20, 1951.... 

Apr. 7 ..........

140 

833

38 55 15 49

Jan. 20, 1951.... 

Apr. 7 ..........

39 55 15 55

278 

184

47 

33

19 

12

0.5

HUMBOLDT RIVER AT BEOWAWE

278 

192

51 

34

25 

14

0.9

HUMBOLDT RIVER NEAR DUNPHY

Dec. 6, 1950 .... 

Jan. 20, 1951.... 

Apr. 7 ..........

34 

36

39 

54

12 

15

57 

56

215 

278 

191

49 

49 

35

30 

28 

16

2.2 

.4

HUMBOLDT RIVER NEAR BATTLE MOUNTAIN

Jan. 19, 1951 ..... 

Apr. 7 ...........

214 

883

36 54 14 56 274 

197

49 

34

27 

17

0.3 
HUMBOLDT RIVER BASIN Continued

MISCELLANEOUS ANALYSES OF STREAMS IN HUMBOLDT RIVER BASIN IN N

Chemical analyses, in parts per million, water year October 1950 to Septemb

Date of collection

Mean 

discharge 

(cfs)

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04 )

Chloride 

(Cl)

Fluoi 

ride 

(F)

Nitrate 

(NO,)

Boron 

(B)

P

m

HUMBOLDT RIVER AT COMUS

Dec. 6, 1950. .... 

Jan. 19, 1951 .... 

Apr. 7 ..........

160 

234 

733

39 

37

46 

53

14 

16

79 

58

294 

278 

208

52 

52 

42

35 

30 

24

0.5 

.6

HUMBOLDT RIVER AT WINNEMUCCA

Jan. 19, 1951 .... 

Apr. 7 ..........

278 

642

36 55 15 63 286 

212

54 

44

32 

23

0.5 

HUMBOLDT RIVER NEAR IMLAY

Dec. 6, 1950 .... 

Jan. 19, 1951 .... 

Apr. 7 ..........

136 

210 

637

31 

37 

34

40 

54

16 

16

83 

69

266 

287 

236

62 

60 

44

45 

38 

28

0.9 

.4 

.3

HUMBOLDT RIVER BELOW LOVELOCK

Dec. 6, 1950. .... 

Jan. 19, 1951....

54 

47

74 

76

22 

23

576 

519

416 

405

175 

169

712 

640

1.0 

1.3
PYRAMID AND WINNEMUCCA LAKES BASIN

MISCELLANEOUS ANALYSES OP STREAMS IN PYRAMID AND WINNEMUCCA LAK

Chemical analyses, in parts per million, water year October 1950 to 

Date of collection

Instantaneous 

* discharge 

(cfs)

Temperature

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(SOJ

Chloride 

(Cl)

Fluo^ 

ride 

(F)

Nitrate 

(NO,)

LAKE TAHOE, SOUTH END, (BIJOU)

Sept. 19 ...........

16 

12

9.2 

9.2

2.4 

2.4

5.6 

6.6

1.6 

1.1

53 

55 

53

2.4 

3.0

2.0 

21 

2.5 0.0

0.5 

.0

LAKE TAHOE, NORTH END, (TAHOE VISTA)

May 1, 1951. .......

Sept. 19 ...........

Apr. 19, 1951 ......

Sept. 1ft ...........

12 

13

9.6 

9.2

2.9 

2.4

5.0 

7.6

1.7 

1.5

56 

56 

55

2.1 

3.9

2.5 

2.2 

2.2 0.0

0.0 

.0

LAKE TAHOE, WEST SIDE, (TAHOE CITY) 

12 9.6 2.2

7.5 

7.2 0.9

56 

54 2.2

2.5 

1.8 0.0 0.2 

TRUCKEE RIVER NEAR TRUCKEE 

Apr. 18, 1951 ......

Sept. 19 ...........

276 

204 13 10 2.4 7.0 1.1

36 

55 3.4

1.0 

1.8 0.0 0.2 

TRUCKEE RIVER AT FARAD 

Sept. 19 ...........

a 821

18 8.8 3.2 5.5 0.8

37 

51 3.0

1.2 

1.8 0.0 0.6 1 

a Mean daily discharge (els).
Part 11. PACIFIC SLOPE BASINS IN CALIFORNI

TULARE LAKE BASIN

MISCELLANEOUS ANALYSES OF STREAMS IN TULARE LAKE BASIN 

Chemical analyses, in parts per million , water year October 1950 to 

Date of collection

Instantaneous 

discharge 

(cfs)

Temperature 

(°F)

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(SO,)

Chloride 

(Cl)

Fluo* 

ride 

(F)

Nitrate 

(NO,)

KAWEAH RIVER NEAR THREE RIVERS

Apr. 15, 1951.....

Sept. 11 ..........

1,010 

1,030 

37

11

13

6.0

15

0.5 

1.7

2.5 

2.7 

16

0.9 

1.8

25 

10 

67

11 

7.7

0.8 

1.0 

15 0.0

1.6 

.4

KINGS RIVER ABOVE NORTH FORK 

Sept. 11 ..........

Apr. 14, 1951..... 

May 10 ...........

Sept. 11 ..........

Apr. 15, 1951 .....

Sept. 11..........

2,790 

150

7.8) 

9.11

3.0 1 0.4 

6.0| 1.2

1.9 

6.3

1.2 

1.0

14 

28

2.5 

7.8

0.6 

3.8 0.0

0.1 

.0) 

KINGS RIVER AT PIEDRA 

4,950 

4,330 

162

9.1 

11

3.0 

7.6

0.4 

2.7

2.0 

1.9 

5.4

700 

385 10 

19

4.3 

24

0.9 

7.3

3.0 

2.7 

24

1.2 

1.2

12 

14 

34

2.3 

7.0

1.8 

.8 

3.8 0.0

0.4 

.4

KINGS RIVER AT PEOPLES WEIR 

0.8 

2.6

21 

20 

130

4.0 

16

1.2 

1.3 

14 0.0

6.2 

1.3
SAN JOAQUIN RIVER BASIN 

SAN JOAQUIN RIVER NEAR VERNALIS, CALIF.

LOCATION. At gaging station in El Pescadero Grant, at Durham Ferry highway bridge, 3 miles downstrea

Vernalis, San Joaquin County.

DRAINAGE AREA. 14,010 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, 1950-51.--Dissolved solids: Maximum, 477 ppm Aug. 1-10; minimum, 69 ppm May 23-31.

Hardness: Maximum, 193 ppm Aug. 1-10; minimum, 30 ppm May 23-31.

Specific conductance: Maximum daily, 851 micromhos Aug.- 3; minimum daily, 81.8 micromhos May 30.

Water temperatures: Maximum, 78°F July 19.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific condu

Sacramento, Calif. Records of discharge for water year October 1950 to September 1951 given in Wa

Chemical analyses, In parts per million, December 1950 to Septem

Date of collection

Dec. 2, 1950 ..... 

Mar. 1-10, 1951. . 

Mar. 11-20. ......

Mar. 21-30. ......

Mar. 31, Apr. 1-10

Apr. 21-22, 27-28 

Apr. 23-26, 29-30 

May 1-10 ........

May 21-22. .......

May 23-31. .......

June 4-5 .........

June 16-20 .......

June 21-23 .......

June 24-29 .......

Mean 

discharge 

(cfs)

10, 800 

8,803 

7,825 

6,980 

3,010

1,820 

3,020 

1,928 

2,618 

5,733 

3,901 

5,660 

10, 510

7,677 

3,635 

2,649 

3,854 

3,317 

2.127

Silica 

(Si02)

13 

19 

19 

17 

21

24 

20 

24 

21 

18 

20

13

14 

20 

23 

14 

15 

22

Iron 

(Fe)

0.02 

.02 

.03 

.04

.03 

.04 

.04 

.04 

.03

.04 

.06

Calcium 

(Ca)

10 

14 

16 

16 

28

20 

30 

21 

13 

18 

15 

7.2

22 

27

Magnesium 

(Mg)

4.3 

6.4 

7.3 

8.2 

14

9.4 

15 

9.6 

5.5 

8.0 

c5.1 

3.0

10 

13

Sodium 

(Na)

IE 

21 

25 

26 

5J

3S 

58 

38 

18 

29

8.1

42 

51

Potassium 

(K)

3.6 

3.8 

4.2

2.6 

2.6

1.8

4.5 

3 6

Bicarbonate 

(HCO,)

51 

63 

70 

67 

100

121 

81 

114 

85 

60 

73 

60 

34

46 

72 

88 

44 

58 

flfi

Sulfate 

(S04)

9.9 

18 

23 

24 

41

49 

23 

36 

23 

10 

20 

14 

5.4

9.4 

19 

28 

11 

15 

31

Chloride 

(Cl)

15 

28 

35 

37 

86

121 

58 

94 

58 

25 

44 

35 

12

18 

36 

62 

24 

36 

R4

Fluo* 

ride 

(F)

0.4 

.4 

.2 

.2

.2 

.1 

.3 

.2 

.1 

.1

.1 

.1

Nitrate 

(NO,)

1.7 

.8 

.6 

.8 

1.7

2.2 

.9 

1.8 

1.4 

1.1 

1.0

.6

.7 

1.4 

1.3 

.9 

1.1 

1 9

Boron 

(B)

P

m

a Sum of determined constituents.

b Determined by direct hardness titration.

c Calculated from hardness and calcium values.
208 PACIFIC SLOPE BASINS IN CALIFORNIA

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SAN JOAQUIN RIVER BASIN 209

SAN JOAQUIN RIVER BASIN Continued 

SAN JOAQUIN RIVER NEAR VERNALIS, CALIF. Continued

Temperature (°F) of water, March to September 1951 

/Once-daily temperature measurement at approximately 8 a. m._7

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

Average

Oct. Nov. Dec.

52

Jan. Feb. Mar.

49

_

49

49

48

48

49

50

50

51

50

51

52

53

53

55

54

53

54

56

56

54

54

54

55

55

56

56

56

56

55

53

Apr.

55

57

59

59

59

59

60

63

65

66

67

68

66

62

61

60

60

59

60

60

61

64

60

60

59

59

61

63

59

58

--

61

May

58

59

60

59

61

60

60

60

60

62

64

60

60

60

62

65

66

68

66

67

68

70

63

63

65

65

65

65

64

63

61

63

June

61

62

66

68

68

68

68

67

68

68

69

69

70

71

72

70

68

69

68

68

69

68

67

69

70

70

71

71

70

71

68

July

72

72

70

70

70

70

70

72

74

--

73

73

71

70

72

73

75

77

78

77

74

73

74

72

72

73

73

73

73

76

76

73

Aug.

75

73

71

71

72

73

73

72

72

73

72

72

71

73

75

75

76

76

76

74

74

72

69

72

73

_

72

72

72

70

73

Sept.

69

69

69

70

70

68

69

70

72

74

73

73

71

--

71

_.

73

72

72

68

71

71

_-

71

68

67

68

68

--

70
SAN JOAQUIN RIVER BASIN. Continued 

STOCKTON DIVERTING CANAL AT STOCKTON, CALIF.

. Just upstream from brld8e on Sanguinetti Lane, at north edge of Stockton, San Joaquin County

^00 feet upstream from gaging station. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951

Water temperatures: March to July 1951. 

REMARKS. Values reported for dissolved solids are residue on evaporation . Records of specific conduct

11 " °n

Chemical analyses, March to September 1951

Date of collection

Mar. 1-10, 1951 ...

Mar. 11-17, 19-20 .

Apr. 1-5, 7-9 .....

Apr. 30, May 1-2, 5-7

June 14-16,18-19 ...

June 21, 23-24, 26, 28

July 13, 15, 23-24 . .

Mean 

discharge 

(cfs)

1,413

443

123

6.8

1.6

11.5

4.9

11.1

Silica 

(SiO,)

21

23

21

18

26

23

18

Iron 

(Fe)

0.02

.02

.03

.06

.03

.03

.06

Calcium 

(Ca)

14

16

21

25

23

23

24

Magnesium 

(Mg)

7.1

7.6

8.5

9.9

11

9.1

9.4

9.8

Sodium 

(Na)

5.0

5.6

6.2

7.0

7.2

8.6

8.5

8.9

Potassium 

(K)

3.0

2.7

2.7

4.2

4.6

2.4

2.4

2.7

Bicarbonate 

(HCO.)

80

88

105

118

119

120

123

SuUate 

(S04)

10

12

15

19

12

13

13

Chloride 

(CD

3.4

4.0

5.8

8.1

4.5

5.5

6.0

Fluo* 

ride 

(F)

0.4

.4

.4

.3

.2

.4

.3

.3

Nitrate 

(NOi)

0.9

.8

.4

.2

1.0

.9

.5

.5

Boron 

(B)

Pa

pe

mi

lio
SAN JOAQUIN RIVER BASIN 211

SAN JOAQUIN RIVER BASIN Continued

STOCKTON DIVERTING CANAL AT STOCKTON, CALIF. Continued 

Temperature (°F) of water, March to July 1951

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

47

47

44

48

47

48

51

52

42

51

51

51

55

58

59

55

60

45

50

56

54

55

55

58

57

57

57

63

56

57

53

Apr.

57

58

60

59

60

_

65

63

64

..

_.

_

_

_

--

_

--

--

_

59

Hay

68

55

_

62

67

60

_

..

_

_

_

..

_

_

..

--

June

_

_

_

--

..

_

_

_

..

77

78

77

74

75

-

71

_

72

71

72

73

_

July

_

__

_

_

--

_

_.

_

..

_

75

_

76

_

_

..

76

77

_

_

_

. 

Aug. Sept.
SAN JOAQUIN RIVER BASIN

MOKKLUMNE RIVER AT WOODBRIDGE, CALIF.

LOCATION. At dam of Woodbridge Irrigation District, San Joaquin County, 0.4 mile upstream from gagin

DRAINAGE AREA.--644 square miles (above gaging station). 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, 1950-51.--Dissolved solids: Maximum, 53 ppm Mar. 21-31, Apr. 1-10; minimum, 39 ppm Sept. 

Hardness: Maximum, 26 ppm Mar. 21-31, Apr. 1-10; minimum, 13 ppm Dec. 1.

Specific conductance: Maximum daily, 74.1 micromhos Sept. 4; minimum daily, 33.1 micromhos Dec. 1

Water temperatures: Maximum, 83°F July 17.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific condu

at Sacramento, Calif. Records of discharge for water year October 1950 to September 1951 given in 

Chemical analyses in parts per million, December 1950 to Septemb

Date of collection

Dec. 1, 1950 .. . 

Mar. 1-10, 1951. 

Mar. 11-20 .... 

Mar. 21-31 ....

Apr. 11-20 .... 

Apr. 21-30 .....

July 1-10 .......

July 11-20 ..... 

July 21-31 .....

Aug. 11-20 ..... 

Aug. 21-31 ..... 

Sept. 1-10 ..... 

Sept. 11-20 .... 

Sept. 21-30 ....

Mean 

discharge 

(cfs)

2,380 

1,392 

1,690 

1,643 

543 

810 

1,018

1,347 

748 

344 

70.9 

20.0 

23.3 

23.9

23.9 

23.1 

24.1 

32.4 

223 

315

Silica 

(Si02)

8.3 

14 

13 

13 

12 

12 

13

13 

12 

12 

12 

12 

12 

13

13 

12 

11 

12 

11 

11

Iron 

(Fe)

0.11 

.07 

.25 

.22 

.21 

.10

.08 

.07 

.05 

.10 

.11 

.13 

.18

.10 

.18 

.09 

.15 

.00 

.00

Calcium 

(Ca)

6.0 

6.2 

6.3 

6.3 

6.0 

6.1

5.7 

5.0 

5.5 

6.0 

6.2 

6.4 

5.5

5.5 

5.6 

5.4 

5.8 

4.7 

4.7

Magnesium 

(Mg)

2.3 

2.1 

2.4 

2.6 

2.3 

2.1

1.9 

1.6 

1.5 

1.6 

1.7 

2.0 

2.1

2.1 

2.2 

2.1 

2.3 

2.0 

3.1

Sodium 

(Na)

2.9 

2.8 

2.6 

2.2 

2.2 

2.5

2.4 

3.0 

2.8 

2.8 

3.0 

3.0 

2.1

2.1 

2.1 

2.1 

2.1 

2.4 

2.5

Potassium 

(K)

5.2 

4.0 

3.5 

3.4 

3.4 

2.2

1.3 

2.6 

2.7 

2.4 

3.2 

3.0 

1.8

1.8 

2.4 

1.4 

1.8 

1.6 

1.6

Bicarbonate 

(HCO,)

19 

32 

30 

29 

29 

28 

29

26 

25 

25 

26 

27 

23 

24

24 

20 

18 

18 

24 

23

Sulfate 

(SO,)

4.4 

6.2 

5.2 

4.8 

4.9 

4.0 

3.8

3.4 

3.2 

3.4 

4.0 

5.2 

11 

6.7

7.2 

10 

11 

12 

5.2 

7.2

Chloride 

(Cl)

2.0 

2. 8 

3.0 

2.1 

2.1 

2.1 

2.0

1.8 

1.9 

1.7 

2.0 

2 2 

2. 2 

2.4

2.3 

2.5 

2.5 

2.2 

1.6 

1.8

Fluoride 

(F)

0.3 

.3 

.3 

.3 

.3 

.1

.1 

.1 

.1 

.1 

.1 

.1 

.1

.1 

.2 

.2 

.2 

.1 

.1

Nitrate 

(NO,)

0.7 

.4 

.4 

.7 

.8 

.7 

.6

.4 

.4 

.3 

.5 

.5 

.5 

.8

.7 

.5 

.5 

.7 

.1 

.3

Boron 

(B)

P

m

l

a Determination by Schwarzenbach method.
SAN JOAQUIN RIVER BASIN 213

SAN JOAQUIN RIVER BASIN--Continued

MOKELUMNE RIVER AT WOODBRIDGE, CALIF. Continued

Temperature ("F) of water, March to September 1951

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

Average

Oct. Nov. Dec.

52

Jan. Feb. Mar.

44

44

46

46

46

47

47

48

48

47

54

50

49

51

50

51

51

50

51

50

49

51

52

52

51

51

52

56

49

Apr.

63

62

50

54

54

49

55

59

58

59

64

54

53

54

54

54

64

61

53

51

50

50

50

51

49

50

50

55

May

51

50

50

51

51

52

51

51

62

59

55

57

57

58

57

58

58

59

57

58

59

57

56

58

64

63

63

59

58

58

62

57

June

61

59

61

60

60

59

59

61

59

59

59

62

69

66

66

61

62

59

63

67

65

68

64

59

60

68

68

70

70

63

July

72

70

68

68

68

72

70

70

68

69

69

70

70

72

83

79

73

71

70

70

71

69

69

76

78

69

69

70

71

71

Aug.

70

69

68

68

69

70

68

70

70

70

70

70

69

70

75

70

70

70

70

70

70

70

69

66

69

72

69

70

68

68

65

69

Sept.

65

63

63

62

62

62

62

63

68

62

60

64

64

62

63

69

71

68

65

67

64

64

65

63

62

62

61

61

62

64

64
SAN JOAQUIN RIVER BASIN--Continued

MISCELLANEOUS ANALYSES OF STREAMS IN SAN JOAQUIN RIVER BAS

Chemical analyses, in parts per million, water year October 1950 to 

Date of collection

Instantaneous 

discharge 

(cfs)

Temperature 

(°F)

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(SO,)

Chloride 

(Cl)

Fluoi 

ride 

(F)

Nitrate 

(NO,)

SAN JOAQUIN RIVER BELOW FRIANT

Apr. 14, 1951 ......

May 9. .............

2,050 

1,330 

361

9.8 

7.4

3.7 

2.0

0.7 

.7

3.5 

3.5 

3.1

0.8 

.6

17 

14 

15

5.8 

2.1

3.0 

2.2 

1.5 0.0

2.8 

.2

SAN JOAQUIN RIVER NEAR MENDOTA

Sept. 12 ...........

276 

153 

175

10 

11

4.3 

13

0.8 

6.3

4.5 

4.4 

24

0.8 

1.8

23 

24 

57

2.4 

20

3.5 

2.5 

29 0.4

0.4 

.8

SAN JOAQUIN RIVER NEAR DOS PALOS

May 9. .............

Sept. 12 ...........

4.7 

2.8 

0.7

10 

6.6

11

8.8

2.5 

. 5

8.5 

9.6 

8.1

1.4 

.2

38 

48 

36

5.8 

3.6

9.5 

12 

6.2 0.0

0.4 

.3

SAN JOAQUIN RIVER NEAR GRAYSON

Apr. 12, 1951 ......

May 7. .............

Sept. 13. ...........

885 

1,800 

530

14 

24

18 

35

Apr. 12, 1951 ......

May 8. .............

3,120 

3,470 7.6 3.4

6.5 

15

95 

32 

81

2.1 

2.3

114 

83 

151

24 

67

123 

35 

95 0.0

1.9 

2.1

TUOLUMNE RIVER ABOVE LA GRANGE DAM, NEAR LA GRA

0.8

2.5 

1.2 0.5

28 

15 2.8

1.5 

.9 0.7 

TUOLUMNE RIVER AT HICKMAN

Apr. 12, 1951 ......

May 8 .............

72 

1,060

Apr. 11, 1951 ......

May 7. .............

694 

1,110

8.7 4.9 1.5

57 

3.5 0.7

101 

24 1.9

107 

5.2 0.1 

TUOLUMNE RIVER AT TUOLUMNE CITY

9.1 1 8.0 2.2

65 

8.8 1.1

131 1 

26 | 5. 1

112 

18 1.4 
SAN JOAOUIN RIVER AT MAZE ROAD

Apr. 11, 1951 .......

May 7. ..............

1,180 

6,210 9.9 12 4.1

93 

19 1.5

118

54 11

151 

27 0.9 0.03 

STANISLAUS RIVER AT MOUTH

Apr. 11, 1951 .......

Sept. 14 ............

13 

37

7.3 

26

2.7 

10

11 

3.0 

19

0.8 

2.0

103 

41 

146

3.1 

10

7.5 

1.2 

15 0.0

0.4 

2.6

0.02 

.09

SAN JOAQUIN RIVER NEAR VERNALIS

Apr. 11, 1951 .......

May 7. ..............

Sept. 14. ............

1,800 

6,840 

884

Apr. 10, 1951 .......

May 14. .............

Sept. 18. ............

647 

973 

636

13 

31

10 

10

10 

44

3.9 

15

76 

13 

79

1.3 

3.3

114 

50 

163

8.6 

40

116 

17 

120 0.0

MOKELUMNE RIVER AT LANCHA PLANA

4.7 

4.0

1.4 

1.7

2.5 

2 2 

2.4

0.8 

.6

25 

24 

20

3. 6 

3.8

1.8 

1.4 

1.2 0.0

1.1 

2.1

0.1 

.7

0.06 

.22

0.02 

.03

MOKELUMNE RIVER AT WOODBRIDGE

May 14. .............

Sept. 18. ............

90 

1,250 

86

12

13

May 15. .............

Sept. 20. ............

16 

18

4.9 

6.0

1.4 

2 2

3.5 

2.5 

3.7

0.9 

.8

30 

26 

30

3.0 

6.0

3.0 

1.5 

2.2

1.0 

.0

0.03 

.10

SAN JOAQUIN RIVER AT ANTIOCH

16 

29

7.6 

23

19 

23 

162

2.3

7.5

64 

67 

106

20 

61

24 

36 

272 0.0

0.2 

4.1

0.09 

.18
SACRAMENTO RIVER BASIN 

SACRAMENTO RIVER AT DELTA, CALIF.

LOCATION. Temperature recorder at gaging station 0.2 mile downstream from Dog Creek

2.8 miles south of La Moine. 

DRAINAGE AREA.--427 square miles. 

RECORDS AVAILABLE. June 1951 to September 1951. 

EXTREMES, 1951. Water temperatures: Maximum, 75°FAug. 20. 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 1

Temperature (°F) of water, June to September 1

Day

4

o

Q

13

19

22

9 c

27

9Q

q *

Average 

October

max min

November

max min

December

max mm

January

max min

February

max min

March

max mm

April

max m
SACRAMENTO RIVER BASIN--Continued 

PIT RIVER NEAR MONTGOMERY CREEK, CAL

LOCATION. Temperature recorder at gaging station 1 mile upstream from Cow Canyon Cr

Shasta County.

DRAINAGE AREA. 5,170 square miles, approximately, excluding Goose Lake basin. 

RECORDS AVAILABLE.--June 1951 to September 1951. 

EXTREMES, 1951. Water temperatures: Maximum, 80°F July 22. 

REMARKS.--Records of discharge for water year 1950-51 given in rfater-Supply Paper 12

Temperature (°F) of water, June to September 

Day

4 

Q

12

i ^

i ft

91

99

94

t\n

9O

31

Average ----- 

October

max min

November

max min

December

max min

January

max min

February

max min

March

max min

April

max 
SACRAMENTO RIVER BASIN--Continu

SQUAW CREEK ABOVE SHASTA LAKE, CAL

LOCATION. Temperature recorder at gaging station, 0.5 mile upstream from Salt Creek

west of town of Montgomery Creek, Shasta County 

DRAINAGE AREA. 65.3 square miles.

RECORDS AVAILABLE.--Water temperatures: June 1951 to September 1951. 

EXTREMES, 1951. Water temperatures: Maximum, 72°F July 18-20, 22-24. 

REMARKS. Records of discharge for water year October 1950 to September 1951 given i

Temperature (°F) of water, June to September 

Day

4 __ _ . _ _ ___ __ 

18

19

23

25

no

on

31

Average 

October

max min

November

max min

December

max min

January

max min

February

max mm

March

max min

Apri

max 
SACRAMENTO RIVER BASIN Continue

McCLOUD RIVER ABOVE SHASTA LAKE, C

LOCATION. Temperature recorder at gaging station just upstream from Shasta Lake, 0

miles east of La Moine, Shasta County. 

DRAINAGE AREA.--606 square miles. 

RECORDS AVAILABLE. June 1951 to September 1951.

EXTREMES, June to September 1951. Water temperatures: Maximum, 54°F July 11, 18, 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 1

Temperature (°F) of water, June to Septembe

Day

3

19

99

oc

90

Average 

October

max min

November

max min

December

max mm

January

max min

February

max min

March

max min

Ap

max 
SACRAMENTO RIVER BASIN Continued 

SACRAMENTO RIVER AT KNIGHTS LANDING, CALIF.

LOCATION.--At gaging station, Yolo-Sutter County line, just upstream froir Southern Pacific Railroad br

Feather River. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951. Dissolved solids: Maximum, 177 ppm May 11-31; minimum, 108 ppm Ma

Hardness: Maximum, 90 ppm May 11-31; minimum, 61 ppm Mar. 2-10.

Specific conductance: Maximum daily, 383 micromhos May 27; minimum daily 125 micromhos Mar. 12.

Water temperatures: Maximum, 74'F May 27.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduc

Sacramento, Calif. Records of discharge for water year October 1950 to September 1951 given in Wat

Chemical analyses, in parts per miljion. March to September 

Date of collection

Mar. 2-10, 1951

Mar. 11-20 ....

Mar. 21-31 ....

Apr. 1, 6-10 . . .

Apr. 2-5. ......

Apr. 11-20 ....

Apr. 21-30.. ...

May 1-10

May 11-31 .....

June 1-10 ......

June 11-20.. ...

June 21-30. ....

July 1-10 ......

July 11-20 .....

July 21-31 .....

Aug. 1-10 .....

Aug. 11-20 ....

Aug. 21-31 ....

Sept. 1-10 .....

Sept. 11-20 ....

Sept. 21-30 ....

Mean 

discharge 

(cfs)

19,810

14, 660

11,880

8,130

9,090

5,989

5,007

9,337

6,748

5,317

5,771

5,459

5,800

7,397

8,819

8,814

8,551

8,235

8,550

7,259

6,192

Silica

(sicg

24

25

24

24

24

23

26

25

25

26

26

25

26

24

16

16

16

16

17

17

15

Iron 

(Fe)

0.08

.13

.16

.16

.20

.12

.04

.08

.04

.06

.05

.02

.04

.03

.04

.03

.03

.03

.02

.03

.02

Calcium 

(Ca)

14

14

14

15

18

16

15

14

18

15

15

15

15

14

13

13

14

14

16

16

14

Magnesium 

(Mg)

6.4

6.6

7.1

7.8

10

8.8

8.9

8.6

11

9.4

9.5

9.0

9.1

8.2

7.9

7.8

8.1

9.0

10

10

8.7

Sodium 

(Na)

8.8

8.9

8.3

Potassium 

<K)

3. 6

3.0

3.2

9.7

16

10

16

16

25

20

22

20

20

19

16

16

17

19

21

20

14

5.6

2.7

o i

2.2

2.9

3.0

O Q

2.1

2.7

1.9

2.7

2.2

2.2

2.2

2.7

2.6

Bicarbonate 

(HCO,)

77

78

80

86

QD 

t70

93

94

88

113

103

102

102

102

93

87

89

93

102

113

115

97

Sulfate 

(S04 )

12

12

12

9.7

22

15

19

20

28

22

24

21

21

19

16

19

19

19

19

20

13

Chloride 

(Cl)

6.2

6.1

5.0

6.5

11

8.5

11

11

17

12

14

11

12

10

9.1

8.7

9.5

11

12

12

8.7

Fluo* 

ride 

(F)

0.3

.3

.3

.2

.3

.1

.1

.1

.2

.2

.2

.2

.2

.2

.2

.2

.2

.2

.2

.2

Nitrate 

(NO,)

0.6

.6

.7

.5

.6

.4

.4

.6

.8

.2

.6

.5

.5

.6

.5

.4

.5

.5

.5

.5

.5

Boron 

(B)

P

m
SACRAMENTO RIVER BASIN 221

SACRAMENTO RIVER BASIN Continued 

SACRAMENTO RIVER AT KNIGHTS LANDING, CALIF. Continued

Temperature (°F) of water, March to September 1951 

/Once-daily temperature measurement at approximately 10 a. mj

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

_

46

46

45

46

46

48

48

47

48

47

48

52

52

54

52

50

52

52

..

54

54

54

55

55

55

55

55

54

54

51

Apr.

53

53

54

56

58

56

56

60

60

62

64

64

65

60

60

64

60

61

60

60

62

62

61

60

58

58

59

58

57

56

--

59

May

57

57

56

57

57

56

57

58

62

62

64

58

64

60

62

63

65

64

63

64

67

68

68

68

70

72

74

68

69

64

63

63

June

63

64

64

65

64

64

62

66

65

66

65

69

69

71

70

70

65

-_

70

68

69

66

65

69

67

66

68

69

68

68

--

67

July

66

66

65

67

65

67

68

69

68

68

66

68

68

64

64

68

68

70

70

68

68

68

68

65

67

67

67

67

.__ 68'

68

67

Aug.

67

67

_.

64

64

..

66

66

66

66

66

67

67

68

68

68

68

68

68

67

67

65

65

65

65

6T

66

66

64

65

63

66

Sept.

63

65

64

64

65

64

65

66

66

67

66

65

66

67

67

68

66

67

68

68

68

66

68

66

64

65

66

64

66

65

--

66
SACRAMENTO RIVER BASIN--Continued 

FEATHER RIVER AT NICOLAUS, CALIF.

LOCATION. At gaging station at Nicolaus, Sutter County, 0.4 mile downstream from highway bridge, and 1

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951 . Dissolved solids: Maximum, 111 ppm Aug. 1-10; minimum, 50 ppm Apr. 

Hardness: Maximum, 74 ppm Aug. 11-20; minimum, 33 ppm Apr. 11-30.

Specific conductance: Maximum daily, 189 micromhos Aug. 17; minimum daily, 65.0 micromhos Apr. 17.

Water temperatures: Maximum, 79°F July 18-19.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conducta

at Sacramento, Calif. Records of discharge for water year October 1950 to September 1951 given in Wa

Chemical analyses, in parts per million, March to September 19

Date of collection

Mar. 1-10, 1951 ...

Sept. 1-10 ........

Mean 

discharge 

(cfs)

14,590 

14,000 

13,920 

12,890 

13,670 

10,220

10,910 

3,489 

1,876 

1,200 

656 

422 

349

249 

263 

439 

1,050 

1,524 

1,889

Silica 

(SiO,)

16

17 

15 

i!> 

15 

15

15 

17 

19 

19 

20 

20 

19

20 

20 

19 

19 

16 

18

Iron 

(Fe)

0.10 

.05 

.08 

.07 

.05 

.08

.06 

.10 

.11 

.06 

.04 

.03 

.03

.08 

.01 

.03 

.02 

.00 

.00

Calcium 

(Ca)

9.5 

8.9 

8.7 

8.5 

7.8 

7.8

8.1 

10 

11 

12 

14 

15 

15

16 

16 

15 

13 

13 

13

Magnesium 

(Mg)

4.2 

4.1 

3.6 

3.5 

3.2 

3 2

3.4 

4.1 

4.7 

5.4 

8.9 

7.3 

7.0

8.0 

8.3 

7.3 

6.7 

6.3 

6.2

Sodium 

(Na)

3.6 

3 2 

3.3 

2.6 

2.8 

2.8

3.0 

3.8 

4.0 

2 3

4!?

6.7 

5.9

8.8 

6.7 

5.5 

5.4 

5.3 

5.3

Potassium 

(K)

3.2 

2.6 

4.8 

5.8 

2.7 

1.3

1.5 

1.1 

1.6 

2.1 

2.1 

1.8 

1.8

1.8 

1.6 

1.8 

2.4 

2.4 

2.4

Bicarbonate 

(HCO,)

52 

49 

47 

46 

43 

41

42 

58 

82 

86 

78 

85 

81

91 

91 

84 

78 

78 

78

Sulfate 

(S0«)

8.1 

5.4 

4.1 

3.5 

4.0 

4.4

3.7 

3.9 

4.7 

5.0 

6.8 

7.5 

7.4

8.3 

8.9 

8.5 

6.7 

5.4 

5.1

Chloride 

(Cl)

2.8 

2.5 

1.3 

1.8 

.8 

1.5

1.6 

2.5 

3.0 

2.8 

3.2 

5.4 

4.0

4.4 

4.2 

3.6 

2.8 

2.1 

2.4

Fluoi 

ride 

(F)

0.2 

.2 

.0 

.0 

.2 

.1

.1 

.2 

.1 

.1 

.1 

.1 

.1

.1 

.1 

.1 

.2 

.1 

.1

Nitrate 

(NO,)

0.4 

.4 

.9 

.9 

.6 

.3

.5 

.3 

.4 

.4 

.4 

.5 

.4

.6 

.6 

.5 

.3 

.4 

.8

Boron 

(B)

Pa

pe

mi

lio
SACRAMENTO RIVER BASIN 223

SACRAMENTO RIVER BASIN Continued 

FEATHER RIVER AT NICOLAUS, CALIF.--Continued

_ Temperature (°F) of water, March to September 1951 

/Once-daily temperature measurement at approximately 8 a. m. ~J

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

44

43

42

42

43

44

44

45

46

45

45

45

47

49

49

49

48

49

49

50

50

50

50

50

51

51

50

51

51

50

49

47

Apr.

50

50

51

51

52

52

53

54

56

56

56

56

56

56

56

56

54

54

55

55

54

55

56

55

54

_

56

54

54

52

--

54

May

52

52

52

53

54

52

54

55

56

57

58

55

55

55

56

58

59

61

61

62

62

62

61

62

64

66

66

65

66

65

63

58

June

_

64

64

65

63

63

62

64

66

67

67

68

70

71

70

69

69

69

70

69

68

67

63

69

69

69

72

71

72

72

--

68

July

72

70

69

68

68

68

71

76

76

74

72

69

70

70

70

73

75

79

79

75

73

74

71

69

70

73

71

73

73

75

77

72

Aug.

75

71

70

70

70

71

70

72

70

73

70

72

75

76

75

76

77

72

71

69

70

72

74

72

65

67

69

69

72

Sept.

68

71

71

70

70

68

68

70

71

73

70

69

70

70

71

70

71

70

70

70

69

69

68

66

66

66

64

70

66

69
SACRAMENTO RIVER BASIN--Continued

AMERICAN RIVER AT FAIR OAKS, CALIF.

LOCATION. From Mar. 2 to Apr. 27 samples were collected at gaging station at H Street Bridge, just ea

stream from mouth. From May 3 to Sept. 30 samples were collected at gaging station at Fair Oaks, S

DRAINAGE AREA.--1,921 square miles (above gaging station at Fair Oaks). 

RECORDS AVAILABLE. Chemical analyses: January to December 1906, March to September 1951.

Water temperatures: March to September 1951.

EXTREMES, March to September 1951.--Dissolved solids: Maximum, 69 ppm Aug. 21-31, Sept. 11-20; minimu

Hardness: Maximum, 41 ppm Aug. 1 to Sept. 10; minimum, 19 ppm May 11-31.

Specific conductance: Maximum daily, 112 micromhos Aug. 28; minimum daily, 39.0 micromhos Apr. 11-

Water temperatures: Maximum, 76°F July 15, 18, 31, Aug. 1.

REMARKS --Values reported for dissolved solids are residue on evaporation. Records of specific conduc

at Sacramento, Calif. Discharge data for Mar. 2 to Apr. 27 are for Sacramento gaging station. Reco

September 1951 given in Water-Supply Paper 1215.

Chemical analyses, in parts per million, March to September 

Date of collection

Mar. 2-10, 1951 . 

Mar. 11-20 ..... 

Mar. 21-31 .....

Aug. 1-10 ......

Aug. 11-20 .....

Sept. 21-30......

Mean 

discharge 

(cfs)

7,940 

6,604 

6,410 

6,437 

8,181 

6,010

8,256 

7,338 

3,191 

2,681 

1,656

909 

568 

414 

317 

288 

279

283 

251 

282

Silica 

(Si02)

16 

16 

13 

12 

12 

12

13 

12 

12 

11 

12

15 

16 

15 

15 

14 

14

13 

12 

12

Iron 

(Fe)

0.02 

.01 

.05 

.04 

.02 

.05

.08 

.02 

.03 

.04 

.06

.03 

.03 

.01 

.01 

.01 

.01

.02 

.02 

.02

Calcium 

(Ca)

7.4 

6.8 

6.3 

5.8 

4.9 

5.3

5.5 

4.5 

5.6 

5.6 

7.6

9.7 

10 

9.4 

11 

11 

11

11 

10 

10

Magnesium 

(Mg)

3.5 

3.1 

2.2 

1.9 

2.1 

2.1

2.5 

1.8 

1.6 

1.5 

1.8

2.2 

. 2.6 

3.3 

3.3 

3.4 

3.3

3.4 

3.5 

3.4

Sodium 

(Na)

3.1 

2.9 

1.5 

2.0 

1.3 

2.

2.1 

1.8 

2.4

2.5 

2.5

3.4 

4.1 

3.2 

3.3 

3.3 

3.4

3.2 

3.9 

3". 9

Potassium 

(K)

2.0 

2.0

2.6 

3

3.5 

1.5 

2.2 

1.9 

2.9

2.2 

2.7 

2.4 

2.4 

2.4 

2.4

2.4 

2.1 

2.4

Bicarbonate 

(HCOS )

41 

40 

33 

29 

22 

27

29 

23 

26 

27 

31

39 

43 

46 

50 

50 

49

49 

50 

50

Sulfate 

(S04 )

5.3 

4.6 

3.0 

2.6

2.3

2.9 

1.8 

2.3 

3.0 

2.7

3.8 

4.4 

4.0 

4.2 

4.1 

4.1

4.9 

4.9 

4.9

Chloride 

(CD

3.0 

2.6 

1.6 

1.8 

1.0 

1.4

1.4 

1.4 

1.6 

2.3 

3.0

2.6 

3.7 

4.2 

4.4 

4.8 

5.6

4.9 

5.0 

4.9

Fluoi 

ride 

(F)

0.3 

.3 

.0 

.0 

.2 

.1

.3 

.1 

.0 

.1 

.1

.2 

.2 

.1 

.1 

.1 

.1

.1 

.2 

.2

Nitrate 

(NO,)

0.3 

.2 

.9 

.8 

.8 

.3

.4 

.5 

.2 

.3 

.2

.3

.5 

.5 

.4 

.6 

.7

.5 

.5 

.5

Boron 

(B)

P

m

l
SACRAMENTO RIVER BASIN 225

SACRAMENTO RIVER BASIN Continued 

AMERICAN RIVER AT FAIR OAKS, CALIF.--Continued 

Temperature (°f) of water, March to September 1951

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

44

43

42

42

45

45

48

46

46

48

48

50

50

50

52

51

52

52

53

52

52

53

54

52

_

55

55

48

51

52

49

Apr.

50

50

50

48

51

50

50

51

52

52

51

51

50

50

50

51

50

48

46

49

48

48

50

44

45

51

53

--

50

May

..

51

51

50

50

52

54

56

57

54

51

51

54

_

58

60

59

59

59

59

58

60

61

63

63

63

63

62

61

57

June

70

61

60

62

62

62

62

63

64

65

65

63

68

69

70

70

70

70

71

71

70

69

70

70

70

70

72

72

72

72

--

68

July

73

71

71

71

71

70

71

72

73

73

73

73

73

72

76

75

74

76

_

75

73

72

72

_

73

74

74

75

76

73

Aug.

76

73

72

72

72

_

72

,

72

73

71

72

73

73

74

74

75

75

, 74

74

73

72

72

71

73

74

72

71

69

72

70

73

Sept.

68

68

70

70

69

69

70

70

68

72

71

71

71

72

72

74

72

72

72

72

71

71

70

70

70

68

70

64

62

73

--

70
SACRAMENTO RIVER BASIN--Continued

MISCELLANEOUS ANALYSES OF STREAMS IN SACRAMENTO RIVER BAS

Chemical analyses, 4n parts per million, water year October 1950 to S

Date of collection

Instantaneous 

discharge 

(cfs)

Temperature

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04 )

Chloride 

(Cl)

Fluo* 

ride 

(F)

Nitrate 

(NO,)

SACRAMENTO RIVER AT DELTA

Apr. 11, 1951 ......

Sept. 12. ...........

1,730 

184

17 

27

4.8 

10

7.3 

7.5

2.8 

3.0 

12

0.5 

1.0

47 

53 

84

2.4 

3.1

2.2 

2.0 

8.0 0.0

0.0 

.0

PIT RIVER NEAR CANBY

Apr. 11, 1951......

May 9. .............

226 

718 28 15 4.9

15 

13 3.7

90 

92 7.9

5.0 

2.2 2.2 

BURNEY CREEK NEAR BURNEY

Apr. 11, 1951 ......

Sept. 13. ...........

73 

11

23 

30

5.8 

10

2.9 

5.6

1.8 

2.5 

5.1

0.4 

.6

30 

37 

69

1.4 

1.0

1.8 

.2 

1.2 0.0

0.0 

1.2

PIT RIVER NEAR MONTGOMERY CREEK

Apr. 10, 1951 ......

May 15. ............

5,200 

4,620 38 12 5.8

7.7 

9 2 1.8

71 

81 3.4

7.0 

2. 8 0.0 

McCLOUD RIVER ABOVE SHASTA LAKE

Apr. 10, 1951 ......

May 16. ............

Sept. 15. ...........

1,910 

1,660 

918

Apr. 9, 1951 .......

May 17. ............

Sept. 13. ...........

4,000 

4,900 

6,160

30 

36

24 

22

9.7 

8.4

11 

10

3.9 

4.1

3.4 

3.5 

5.4

1.0 

1.2

52

54 

58

2.2 

1.6

3.2 

1.2

1.5 0.0

0.0 

.0

SACRAMENTO RIVER AT KESWICK

4.6 

5.3

5.5 

4. 5 

5.4

0.9 

1.0

58 

57 

61

8.0 

4.7

2.8 

2.0 

1.5 0.0

0.2 

.0
SACRAMENTO RIVER AT REDDING

Apr. 9, 1951 .......

May 17. ............

Sept. 12. ...........

3,860 

4,990 

6,720

25 

22

10 

9.6

4.9 

5.8

5.3 

5.5 

5.4

1.0 

1.0

61 

60 

63

6.1 

4.9

2.8 

2.0 

1.8 0.0

0.1 

.1

0

COTTONWOOD CREEK NEAR COTTONWOOD

Apr. 12, 1951 ......

May 9. .............

Sept. 13. ...........

409 

612

57

22 

25

24 

13

10 

9.0

8.6 

7.5 

9.0

1.0 

1.2

133 

119

96

13 

6.2

7.5 

6.2 

3.2 0.0

0.4 

1.0

0

SACRAMENTO RIVER AT HAMILTON CITY

Apr. 12, 1951 ......

May 10. ............

Sept. 13. ...........

5,900 

7,240 26 

24

13 

11

6.1 

5.1

6.2 

6.2 

7.0

1.4 

.6

70 

68 

66

8.8 

4.9

5.5 

4.0 

2.8 0.0

0.4 

.6

0

STONY CREEK NEAR HAMILTON CITY

Apr. 12, 1951 .......

May 10. ............

a 30 

a 10 12 34 11

15 

12 0.9

152 

147 15

20 

16 0.2 0

INDIAN CREEK NEAR CRESCENT MILLS

May 8. .............

1,100 

1,010

Apr. 10, 1951 ......

May 8. .............

9,520 

8,100

25 10 3.4

3.8 

3.4 0.9

46 

55 2.3

1.2 

1.0 0.0 0

FEATHER RIVER NEAR OROVILLE

16 8.4 3.6

3.2 

2.4 0.9

41 

46 3.0

3.5 

1.5 O.OJ 0

YUBA RIVER AT SMARTSVILLE

Apr. 10, 1951 ......

May 8. .............

5,500 

5,080 13 7.3 2.2

1.8 

1.5 0.5

38 

33 3.1

2.8 

1.0 0.0 0

a Mean daily discharge (cfs).
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CACHE CREEK NEAR LOWER LAKE

Apr. 16, 1951 ......

June 4 .............

18 219

189

13

12

8.5 1.9

SACRAMENTO RIVER AT RIO VISTA

May 15. ............

Sept. 20. ...........

16

22 18 12

8.0

26 1.3 124 20 26 0.0 1.4 .17 
RUSSIAN RIVER BASIN

MISCELLANEOUS ANALYSES OF STREAMS IN RUSSIAN RIVER BASIN IN C

Chemical analyses, in parts per million, water year October 1950 to Septem

Date of collection

Instantaneous 

discharge 

(cfs)

Temperature

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04 )

Chloride 

(Cl)

Fluo* 

ride 

(F)

Nitrate 

(NO,)

Boron 

(B)

EAST FORK RUSSIAN RIVER NEAR CALPELLA

Oct. 26, 1950........ a277 3.2

Apr. 12, 1951 ....... 294

May 16.............. 345 12

Apr. 12, 1951 .....

May 8............... 538 13

Apr. 8, 1951 ........ 662

May 8............... 1,060 16

Sept. 9.............. 131 14

Apr. 13, 1951....... 793

May 8............... 1,600 ____ 17

a Mean daily discharge (cfs).

b Includes equivalent of 6 parts per million of carbonate (CO.,).

7.3

6.'5 

7.0 

5.0

b90 

91 

91

7.7 

9.5

3.2 

3.2 

3.5

0.0 

.0

RUSSIAN RIVER NEAR HOPLAND

105

107 11 1.2 0.44 

RUSSIAN RIVER NEAR HEALDSBURG

0.9 

1.0

141

133

162

5.5 

4.2 

5.5

0.59 

.67

RUSSIAN RIVER AT GUERNEVILLE

11

6.7

148

132 1.5 0.48 
KLAMATH RIVER BASIN

MISCELLANEOUS ANALYSES OF STREAMS IN KLAMATH RIVER BASIN 

Chemical analyses, in parts per million, water year October 1950 to 

Date of collection

Instantaneous 

discharge 

(cfs)

Temperature 

(°F)

Silica 

(Si02)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCOS )

Sulfate 

(S04 )

Chloride 

(Cl)

Fluoi 

ride 

(F)

Nitrate 

(NO,)

KLAMATH RIVER BELOW FALL CREEK NEAR COPCO

Apr. 9, 1951 ........

May 7 ..............

3,250 

4,440 5.3 12 6.6

16 

15 2.5

72 

72 28

KLAMATH RIVER AT

Oct. 12, 1950. .......

Apr. 10, 1951 .......

May 10. .............

1,980 

15,500 

11,200

23 

12

0.01 18 

12

9.0 

6.8

24

5.5 

7.5

4.0 

1.3

al!2 

61 

73

34 

14

4.2 

4.2 1.5 

SOMESBAR

10 

2.5 

3.2

0.3 

.0

TRINITY RIVER AT LEWISTON

Apr. 11, 1951 .......

Sept. 12. ............

4,910 

4,080 

138

13

14

4.0 

9.2

6.6 

12

1.5 

1. 5 

4.8

0.1 

. 4

47 

46 

87

2.0 

4.0

1.0 

1.2 

5.2 0.0

0.0 

.0

TRINITY RIVER NEAR HOOPA

Oct. 18, 1950. .......

May 11. .............

693 

10, 600 

8,980

12 

13

0.01 22 

11

9.5 

6.6

6.8 

2.5 

2.0

3.6 

. 5

bl06 

61 

66

8.7 

3.9

9.5 

1.2 

1.5

0.1 

.0

KLAMATH RIVER NEAR KLAMATH

Apr. 11, 1951 .......

May 13. .............

29, 100 

22, 900 12 12 6.3

2.0 

5.2 0.9

60 

68 9.1

1.8 

2.5 0.0 

a Includes equivalent of 35 parts per million of carbonate (CO,), 

b Includes equivalent of 6 parts per million of carbonate (CO,).
PART 12. PACIFIC SLOPE BASINS IN WASHINGTON AND UPPER CO

UPPER COLUMBIA RIVER BASIN

COLUMBIA RIVER MAIN STEM

COLUMBIA RIVER AT GRAND COULEE DAM, WASH

LOCATION. At Grand Coulee Dam, Grant-Okanogan County line, 2,500 feet upstream from gaging station, w

DRAINAGE AREA. 74,100 square miles, approximately (above gaging station). 

RECORDS AVAILABLE. Chemical analyses: November 1950 to September 1951.

Water temperatures: November 1950 to September 1951. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 99 ppm May 1-10; minimum, 83 ppm Sept. 1-20.

Hardness: Maximum 78 ppm May 1-10; minimum, 67 ppm May 21-31.

Specific conductance: Maximum daily, 164 micromhos May 10; minimum daily, 136 micromhos May 29-30, 

Water temperatures: Maximum, 65°F Aug. 19; minimum, 37°F on many days during February to April.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduc

Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given in 

Chemical analyses, in parts per million, November 1950 to Septembe

Date of collection

Nov. 25-30, 1950

Jan. 1-10, 1951..

Feb. 1-10. ......

Feb. 11-20......

Mar. 11-20. .....

May 1-10 ........

May 21-31. .......

June 1-10 ........

June 21-3Q .......

July 1-10, ........

July 11-17. .......

Mean 

discharge 

(cfs)

63, 250 

60, 060 

59,450 

88, 090

83, 940 

76,060 

70, 520 

62, 930 

102, 700 

96,950

78, 970 

77, 900 

66, 940 

71,660 

119,400 

142, 400

184, 000 

309, 600 

345, 300 

314,900 

290, 400 

313,900

293, 700 

287. 100

Silica 

(Si02)

5.4 

7.2 

6.9 

7.2

7.0 

6.9 

7.1 

7.5 

7.5 

7.8

9.1 

8.9 

11 

10 

10 

' 11

12 

11 

9.5 

9.4 

8.2 

8. 2

8.3 

8.2

Iron 

(Fe)

0.04 

.03 

.03

.01 

.02 

.06 

.02 

.02 

.03

.04 

.04 

.24 

.05 

.03 

.01

.03 

.06 

.04 

.14 

.12 

.06

.02 

.06

Calcium 

(Ca)

20 

22 

21 

22

21 

21 

20 

21 

21 

20

20 

21 

21 

21 

22 

22

23 

22 

20 

21 

21 

21

20 

20

Magnesium 

(Mg)

4.9 

4.9 

4.7 

5.1

5.5 

5.2 

5.2 

5.2 

5.1 

5.2

5.3 

5.3 

4.8 

4.6 

4.7 

4.8

5.0 

4.7 

4.2 

4.4 

4.6 

4.4

5.3 

4.8

Sodium 

(Na)

2 

1.6 

1.7 

1.8

2.0 

2.3 

2.2 

2.3 

2.4 

3

2.2 

1.9 

2.8 

3.0 

2.8 

3.2

2.9 

3.0 

2.0 

2.0 

2.3 

2.0

1.8 

1

Potassium 

(K)

9 

1.5 

2.0 

2.2

2.4 

4.0 

3.4 

3.8 

4.0 

3

5.8 

5.3 

1.1 

.8 

1.8 

2.1

2.2 

1.9 

1.6 

1.6 

1.8 

1.6

3.8 

9

Bicarbonate 

(HCO,)

75 

76 

78 

78

77 

80 

77 

78 

78 

76

76 

77 

75 

77 

78 

79

81 

78 

73 

73 

77 

77

76 

78

Sulfate 

(S04 )

13 

13 

13 

13

14 

13 

14 

14 

14 

14

16 

16 

15 

15 

16 

15

15 

14 

11 

11 

11 

12

11 

12

Chloride 

(Cl)

0.8

1.0 

1.2 

1. 1 

1.2 

1.2 

.9

.8 

1.2 

1.1 

1.0 

1.1 

1.4

1.1 

1.0 

.9 

.9 

.9 

.9

1.0 

1.2

Fluoi 

ride 

(F)

0.2 

.2 

.3

.0 

.0 

.0 

.0 

.0 

.0

.0 

.0 

.2 

.2 

.2 

.2

.2 

.2 

.2 

.2 

.2 

.2

.1 

.1

Nitrate 

(NO,).

0.3 

.6 

.7 

.6

.6 

1.1 

.7 

.7 

.1 

.5

1.2 

1.3 

1.0 

. 5 

.5 

.6

.5 

.4 

.6 

.4 

.5 

.6

.5 

.8

Boron 

(B)
Sept. 21-30. ......

Weighted average

190, 300

111,000

91,210

80, 510

67, 320

59, 590

c 140, 000

6.2

5.5

8.6

0.07

.02

.03

0.06

20

20

20

20

20

21

4.7

4.9

4.9

4.7

4.7

4.8

1.5

1.5

1.3

1.3

1.3

2.2

3.2

2.7

2.7

2.9

2.7

2.4

76

76

78

78

76

75

77

11

11

11

12

12

12

13

0.6

.6

.7

.6

.7

.6

1.0

_

0.0

.0

.0

-.0

. 1

0.1

_

0.6

.8

.6

.6

.6

0.6

a Not included for computation of weighted averages.

b Determined by Schwarzenbach method.

c Represents 82 percent of runoff for water year October 1950 to September 1951.
234 PACIFIC SLOPE BASINS IN WASHINGTON AND UPPER COLUMBIA RIVER BASIN

UPPER COLUMBIA RIVER BASIN Continued

COLUMBIA RIVER MAIN STEM Continued 

COLUMBIA RIVER AT GRAND COULEE DAM, WASH. Continued

Temperature (°F) of water, November 1950 to September 1951 

/Once-daily temperature measurement at approximately 10 a. mj

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

Average

Oct. Nov.

..

..

..

._

--

_.

--

.-

__

.-

--

..

-.

--

--

--

__

--

-_

55

55

55

54

55

54

Dec.

54

53

53

53

52

52

52

52

52

45

52

51

50

50

50

50

50

50

49

49

48

48

47

47

47

47

47

47

47

47

47

50

Jan.

47

47

47

46

46

46

46

46

45

45

45

45

45

45

45

45

45

44

44

44

44

44

44

43

43

43

43

43

42

42

42

45

Feb.

41

41

41

41

40

40

40

40

39

--

39

39

39

39

39

..

39

39

39

39

39

39

38

38

38

38

37

37

..

--

39

Mar.

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

37

Apr.

37

37

38

39

39

38

38

38

..

38

38

39

39

39

39

39

39

40

40

41

41

42

42

42

42

42

42

42

42

--

40

May

42

42

42

42

42

42

43

44

44

44

44

45

45

46

47

47

47

47

48

48

48

48

48

48

49

49

49

49

49

49

49

46

June

49

49

50

50

--

51

51

51

51

51

51

51

51

51

51

51

51

51

52

52

52

52

53

53

54

54

55

55

55

52

July

55

55

55

56

56

56

56

56 .

56

56

57

57

57

57

57

58

58

--

_

_-

._

_

_-

--

Aug.

..

_

61

62

62

62

63

63

63

63

63

63

63

63

65

64

64

64

64

64

63

63

63

63

63

63

63

63

Sept.

63

63

63

63

63

63

63

63

63

63

63

63

63

63

63

64

64

64

64

64

64

64

64

64

64

64

64

64

64

64

--

64
PART 13. SNAKE RIVER BASIN 235

SNAKE RIVER MAIN STEM 

SNAKE RIVER AT NEELEY, IDAHO

LOCATION. At gaging station at Neeley, Idaho, 400 feet upstream from Fish Hatchery 

buildings, and 0.9 mile downstream from American Falls Dam.

DRAINAGE AREA. 13,600 square miles, approximately, excluding non-tributary area on 

Snake River plains.

RECORDS AVAILABLE. Water temperatures: October 1949 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 70°FAug. 2, 3, 8; minimum, freezing point on several days in January and February.

EXTREMES, 1949-51. Water temperatures: Maximum, 70°FAug. 2, 3, 8, 1951; minimum, 

freezing point on many days during Winter months.

Temperature (°F) of water, water year October 1950 to September 1951

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

Average

Oct.

56

55

55

56

54

54

53

53

52

52

52

52

52

53

53

51

52

52

52

52

52

51

51

50

50

50

50

50

50

51

50

52

Nov.

50

50

50

50

50

50

49

49

44

43

43

43

43

44

43

43

43

43

42

43

43

42

42

41

41

41

40

40

39

39

--

44

Dec.

40

39

38

39

38

38

38

38

38

36

36

38

38

38

37

37

37

36

37

37

37

37

36

36

36

35

35

35

37

36

35

37

Jan.

35

35

35

35

33

33

32

32

32

32

32

32

33

33

33

33

34

34

34

33

33

33

34

34

34

34

34

33

32

32

32

33

Feb.

32

32

33

34

35

34

34

35

35

35

35

35

35

35

35

36

35

35

35

36

36

36

37

36

37

36

37

37

..

--

--

35

Mar.

37

37

37

37

36

36

36

36

37

37

37

37

37

37

38

37

37

37

36

36

36

37

37

37

37

38

38

38

38

38

38

37

Apr.

38

38

38

39

39

39

40

40

41

41

42

42

42

43

43

44

44

46

46

46

46

46

46

47

47

47

47

47

47

46

43

May

47

47

47

48

48

49

49

49

49

50

50

50

50

50

50

50

50

50

51

51

51

52

52

52

52

53

53

53

55

55

55

51

June

55

55

55

56

56

56

56

56

56

56

56

56

56

56

56

56

56

56

57

57

57

57

58

58

58

58

59

59

59

60

57

July

60

61

61

61

61

62

62

62

62

62

62

64

64

64

64

65

65

66

66

66

65

64

64

65

67

67

68

69

68

69

69

64

Aug.

69

70

70

69

69

69

69

70

69

69

69

69

69

69

69

69

69

67

67

67

67

67

67

67

67

67

67

67

66

66

66

68

Sept.

6/

65

65

64

64

65

65

65

65

64

64

63

63

62

62

62

62

62

62

62

61

61

60

60

60

59

58

58

58

58

--

62
SNAKE RIVER MAIN STEM Continued 

SNAKE RIVER AT KING HILL, IDAHO

LOCATION.--At county highway bridge about 400 yards downstream from gaging station, which is 300 fee

County, and 20 miles downstream from Big Wood (Malad) River. 

DRAINAGE AREA. 35,800 square miles, approximately. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951.--Dissolved solids: Maximum, 346 ppm Sept. 21-30; minimum, 283 pp

Hardness: Maximum, 210 ppm Sept. 11-20; minimum 181 ppm May 11-31.

Specific conductance: Maximum daily, 564 micromhos Aug. 21; minimum daily, 434 micromhos Apr. 14.

Water temperatures: Maximum, 69°F on several days in July and August.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific cond

Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given 

Chemical analyses, in parts per million, March to Septembe

Date of collection

Mar. 27-31, 1951 .

June 1-10 ........

Aug. 1-10 ........

Sept. 1-10 ........

Sept. 21-30 ......

Mean 

discharge 

(cfs)

18,500 

17,900 

15,070 

10,040

16,780 

18,580 

18,630 

14,810 

8,694 

10,810

8,209 

8,039 

8,219 

9,005 

9,203 

8,876

8,987 

 9,475 

9,999

Silica 

(Si02)

30 

29 

30

34

29 

23 

25 

27 

32 

31

33 

36 

37 

37 

38 

37

36 

35 

35

Iron 

(Fe)

0.06 

.03 

.05 

.07

.06 

.06 

.03 

.04 

.06 

.08

.03 

.02 

.02 

.02 

.02 

.01

.01 

.01 

.02

Calcium 

(Ca)

50 

52 

46 

44

45 

46 

46 

47 

45 

46

45 

44 

43 

46 

46 

47

47 

48 

48

Magnesium 

(Mg)

17 

17 

17 

19

18 

16 

16 

17 

19 

19

20 

20 

20 

21 

21 

21

21 

22 

21

Sodium 

(Na)

26 

20 

25 

29

26 

27 

25 

27 

32 

33

31 

35 

36 

35 

35 

35

36 

36 

36

Potassium 

(K)

9.8 

9.2 

6.7 

6.1

6.1 

6.0 

6.0 

7.0 

8.6 

6.2

5.4 

5.0 

5.2 

5.6 

4.8 

4.8

5.0 

5.6 

5.6

Bicarbonate 

(HCOa )

205 

202 

195 

196

194 

201 

200 

204 

210 

212

210 

213 

216 

217 

217 

217

222 

226 

226

Sulfate 

(S04)

46 

46 

44 

49

47 

45 

45 

47 

54 

54

52 

56 

57 

58 

57 

59

60 

61 

62

Chloride 

(Cl)

23 

23 

22 

24

22 

22 

20 

22 

25 

26

24 

26 

27 

28 

26 

26

27 

.28 

26

Fluo* 

ride 

(F)

0.6 

.6 

.7 

.6

.7 

.7 

.7 

.7 

.7 

.7

.5 

.5 

.5 

.5 

.5 

.5

.5 

.5 

.5

Nitrate 

(N0$)

4.4 

4.3 

2.4 

3.2

2. 6 

2.6 

2.0 

2.8 

3 3 

3 3

3.1 

3.4 

4.0 

4.5 

3.7 

3.7

4.1 

3.2 

3.1

Boron 

(B)

P

p

m

l
SNAKE RIVER MAIN STEM 237

SNAKE RIVER MAIN STEM Continued 

SNAKE RIVER AT KING HILL, IDAHO Continued

_ Temperature (°F) of water, March to September 1951 

/Once-daily temperature measurement at approximately 11:45 a. m. 7

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

Average

Oct. Nov. Dec. Jan. Feb. Mar.

..

_

_

_

--

_

_

--

_

_

~

..

_

__

_

..

_

_

_

..

49

49

49

48

47

..

Apr.

49

50

50

52

53

54

54

54

52

53

54

55

55

55

55

55

57

57

57

55

55

55

_

55

57

59

57

55

53

54

May

53

53

55

55

57

59

57

58

58

60

58

58

55

56

57

59

60

60

60

60

60

63

63

63

63

63

64

61

61

60

59

59

June

59

58

59

60

58

59

59

60

61

62

63

63

63

63

65

66

65

65

65

65

64

64

64

63

63

64

65

65

65

65

..

63

July

65

66

67

65

66

65

65

65

65

66

65

65

66

67

67

67

68

69

69

67

65

65

67

67

67

68

68

69

68

69

68

67

Aug.

69

69

69

69

68

68

67

 67

66

66

66

66

66

65

65

65

65

65

66

66

67

66

65

65

64

64

64

63

63

62

62

66

Sept.

62

62

63

63

63

63

64

63

63

63

60

61

60

60

62

62

62

63

63

61

60

60

60

60

60

59

60

59

60

61

61
BOISE RIVER BASIN 

BOISE RIVER AT NOTUS, IDAHO

LOCATION.--At steel county highway bridge, 360 yards downstream from gaging station which is a quart

northwest of Caldwell. 

DRAINAGE AREA. 3,820 square miles. 

RECORDS AVAILABLE. Chemical analyses: January 1939 to January 1940, November 1950 to September 195

Water temperatures: November 1950 to September 1951.

Sediment records: January 1939 to June 1940. 

EXTREMES, 1950-51. Dissolved solids: Maximum, 439 ppm Sept. 1-10; minimum, 89 ppm May 21-31.

Hardness: Maximum, 206 ppm Feb. 1-5; minimum, 39 ppm May 21-31.

Specific conductance: Maximum daily, 765 micromhos Feb. 1; minimum daily, 93.8 micromhos Apr. 20.

Water temperatures: Maximum, 85°F on several days in July and August; minimum, 36°F Jan. 31, Feb. 

EXTREMES, 1939-40, 1950-51.--Dissolved solids: Maximum, 914 ppm Aug. 21-31, 1939; minimum, 89 ppm M

Hardness: Maximum, 284 ppm July 21-31, 1939; minimum, 39 ppm May 21-31, 1951.

Specific conductance: Maximum, 1,390 micromhos Aug. 21-31, 1939; minimum daily 93.8 micromhos Apr

Sediment loads (1939-40): Maximum, 8,000 tons Apr. 2, 1939; minimum, 0.3 ton Aug. 3, 1939.

REMARKS.--Values reported for dissolved solids are residue on evaporation. Records of specific cond

Salt Lake City, Utah. Records of discharge for water year October 1950 to September 1951 given i

Chemical analyses, in parts per million, November 1950 to Se

Date of collection

Nov. 21-30, 1950

Dec. 11-20...... 

Dec. 21-31.....

Jan. 1-10, 1951. 

Jan. 11-20. .....

Jan. 21-31......

Feb. 1-5 .......

Feb. 6-10. ......

Feb. 11-ia..... 

Feb. 20-2a .....

Mar. 1-10......

Mar. 11-20..... 

Mar. 21-31, Apr. 

1-2...........

Apr. 11-20. ..... 

Apr. 21-30. .....

Mean 

discharge 

(cfs)

6*5 

829 

786 

697

660 

662 

690 

832 

1,860 

1,412 

1,266

1,386 

2,621

3,775 

5,138 

4,817 

5,793

Silica 

(Si02)

39 

31 

31 

32

32 

35 

36 

37 

28 

28 

27

26 

23

21 

18 

18 

19

Iron 

(Fe)

0.06 

.06 

.05

.05 

.02 

.04 

.04 

.29 

. 13 

.04

.07 

.11

.16 

.23 

.19 

.15

Calcium 

(Ca)

49 

45 

47 

46

49 

44 

48 

61 

29 

31 

28

26 

20

17 

15 

12 

13

Magnesium 

(Mg)

14 

12 

12 

12

13 

13 

13 

13 

7.9 

8.7 

7.4

6.6 

5.3

3.9 

3.1 

3.5 

2.9

Sodium 

(Na)

8C 

66 

62 

66

68 

64 

66 

65 

33 

38 

38

35 

22

16 

11 

7.6 

9.8

Potassium 

(K)

6.4 

5.9 

5.0

5.6 

7.5 

7.5 

10 

7.0 

5.0 

3.5

3.7 

2.7

6.7 

6.6 

3.4 

2.4

Bicarbonate 

(HCO,)

264 

234 

233 

236

249 

232 

240 

289 

141 

155 

149

135 

98

82 

66 

58 

60

Sulfate 

(SO,)

97 

82 

81 

89

88 

83 

83 

84 

45 

50 

49

44 

29

22 

15 

11 

9.5

Chloride 

(Cl)

23 

20 

19 

20

22 

22 

21 

21 

11 

12 

12

10 

7.0

5.2 

3.5 

2.2 

2.2

Fluoride 

(F)

0.5 

. 5 

.4

.4 

.5 

.5 

.4 

.4 

.3 

.5

.5 

.5

.4 

.4 

.2 

.5

Nitrate 

(NO,)

4.5 

4.9 

4.2 

4.2

3.0 

5.6 

5.4 

4.3 

5.0 

5.6 

5.0

4.8 

3.8

4.9 

4.4 

1.9 

2.5

Boron 

(B)
BOISE RIVER BASIN--Continued 

BOISE RIVER AT NOTUS, IDAHO Continued 

Chemical analyses, in parts per million, November 1950 to September 

Date of collection

May 1-10, 1951. . May 11-20. ......

June 1-10. ...... .

June 11-20. ......

June 21-30. ......

July 1-10........

Ano- 11 90

Sept. 11-20. .....

Sept. 21-30..... .

Weighted average

Mean 

discharge 

(cfs)

4,951 

5,897 

5,734 

4,189 

2,650 

1,180

796 

181 

186 

242 

126 

266

252 

290 

328

a 1,924

Silica 

(Si02)

18 

18 

15 

17 

18 

18

22 

31 

3<. 

32 

34 

36

39 

39 

37

21

Iron 

(Fe)

0.13 

.10 

.07 

.11 

.07 

.08

.07 

.03 

.02 

.03 

.03 

.03

.02 

.03 

.03

0.12

Calcium 

(Ca)

14 

13 

12 

14 

15 

19

24 

38 

38 

39 

44 

43

46 

45 

43

19

Magnesium 

(Mg)

2.8 

2. 8 

2.3 

3.2 

3. 5 

4. 5

5.9 

11 

11 

11 

13 

12

14 

14 

13

4.8

Sodium 

(Na)

10 

11 

9.6 

14 

16 

22

32 

69 

66 

66 

87 

76

81 

79 

73

21

Potassium 

(K)

2.7 

2.6 

3.2 

3.7 

3.7 

4.0

5.3 

3.7 

3.4 

3.0 

4.0 

3.5

7.0 

7.6 

6.2

4.1

Bicarbonate 

(HCO,)

64 

62 

57 

73 

79 

99

130 

214 

218 

223 

259 

246

260 

256 

248

97

Sulfate 

(SOJ

10 

11 

9.4 

15 

16 

23

33 

79 

72 

73 

99 

88

96 

93 

86

26

Chloride 

(Cl)

2.6 

2.9 

2.2 

3.8 

4.2 

6.0

8.5 

22 

18 

19 

28 

24

25 

23 

20

6.2

Fluoride 

(F)

0.5 

.5 

.4 

.4 

.5 

.5

.5 

.5 

.5 

. 5 

.4 

.4

.5 

.6 

.6

0.4

Nitrate 

(NO,)

2.2 

3.2 

2.0 

1.9 

2.1 

2.4

4.3 

4.1 

3 2 

3.2 

3.1 

4.2

3.3 

3.5 

4.9

3.2

Boron 

(B)

a Represents 93 percent of runoff for water year October 1950 to September 1951.
240 SNAKE RIVER BASIN

BOISE RIVER BASIN Continued 

BOISE RIVER AT NOTUS, IDAHO Continued

/Once-daily temperature measurement at approximately 4 p. m.7

Day

1

2

3

4

5

6

1

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Avpr

age

Oct. Nov.

--

..

..

--

..

-.

--

52

52

51

51

52

50

50

48

48

51

--

"

Dec.

41

45

45

48

45

45

42

48

48

48

48

50

48

48

49

47

47

47

47

47

47

47

47

45

45

45

45

45

46

45

45

46

Jan.

42

43

42

45

45

43

40

40

42

41

41

41

44

45

42

43

47

47

43

41

41

43

43

45

45

45

45

38

38

38

36

42

Feb.

36

36

40

41

41

43

45

47

4V

50

48

48

46

46

46

47

45

45

42

41

45

47

47

46

46

46

46

46

_.

_

45

Mar.

44

45

42

42

42

45

45

44

43

43

42

44

44

46

45

45

45

45

46

47

47

46

46

48

48

47

47

47

46

48

48

45

Apr.

50

51

54

53

53

53

56

55

53

53

54

53

53

58

55

60

67

55

55

55

55

56

56

56

56

58

58

55

55

55

55

May

55

58

58

60

60

58

60

58

58

58

55

55

58

58

60

60

60

62

62

62

83

62

62

62

62

63

60

59

59

56

56

59

June

56

55

55

55

60

60

60

63

63

65

68

67

68

73

73

73

70

70

72

72

72

70

70

70

70

72

72

72

74

74

--

67

July

74

75

75

74

74

. 74

75

75

76

76

76

76

80

80

82

82

84

85

80

80

78

82

82

85

82

82

82

82

85

85

85

79

Aug.

85

85

85

80

80

80

80

78

80

85

85

85

85

80

80

80

80

80

80

80

75

75

75

75

75

75

70

70

70

70

79

Sept.

70

70

-.

73

75

76

75

71

_.

72

70

70

70

70

72

72

68

70

70

67

68

68

67

67

67

65

65

65

63

63

69
SNAKE RIVER BASIN Continued

MISCELLANEOUS ANALYSES OF STREAMS IN SNAKE RIVER BASIN I

Chemical analyses, in parts per million, principally October 1950 to Sept

Date of collection

Mean 

discharge 

(cfs)

Temperature 

(°F)

Silica 

(SiOa)

Iron 

(Fe)

Calcium 

(Ca)

Magnesium 

(Mg)

Sodium 

(Na)

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04 )

Chloride 

(Cl)

Fluoride 

(F)

Nitrate 

(N0$)

Bo

ro

(B

SNAKE RIVER NEAR BURLEY

Nov. 19, 1950 ..... 

Jan. 19, 1951..... . Mar. 26. ..........

23 

23 

15

50 

55

18 1 29 

18 28

210 

220 

180

50 

53 

45

25 

25 

24

2.3 

1.6

SALMON FALLS CREEK NEAR BUHL

Nov. 19, 1950 ..... 

Jan. 17, 1951. .....

I I 55 1 I 89 1 30 

| 1 54 1 1 86 I 28

Nov. 19, 1950 ..... 

Jan. 17, 1951......

Mar. 26. ..........

77 

80

246 

246

193 

189

73 

70

9.6 

10

SNAKE RIVER BELOW THOUSAND SPRINGS NEAR HAGERMAN

37 

32 

23

' 20 3

Nov. 19, 1950 ..... 

Jan. 19, 1951. .....

33 1 38 

34 40

17 

17

6 214 

215 

218

56 

54 

52

27 

28 

25

4.0 

2.9

HALAD RIVER NEAR HAGERMAN

23 

21

196 

196

30 

31

14 

13

3.5 

4.2

WEISER RIVER AT WEISER

Dec. 10, 1948 ..... 

Aug. Z2, 1949 ..... 

Nov. 20, 1950 .....

29 

32 

29

17 6.3 1 3 94 

140 

86

12 

18 

8.1

4.8 

4 

3.1

0.7

0.2 

1.6

.5

a Determined by Schwarzenbach method.
PART 14. PACIFIC SLOPE BASINS IN OREGON AND LOWER COL

JOHN DAY RIVER BASIN 

DESOLATION CREEK NEAR DALE, OREG.

LOCATION. Temperature recorder at gaging station, 1 mile upstream from mouth, and 2 mi

DRAINAGE AREA. 108 square miles.

RECORDS AVAILABLE.--Water temperatures: December 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 76°F July 24; minimum, freezing point 

REMARKS.--Records of discharge for water year 1950-51 given in Water-Supply Paper 1218.

Temperature (°F) of water, December 1950 to Septembe

Day

2

3

g

12

1 q

1 o

19

on

27

30 - 

Average 

October

max mm

November

max mln

December

max

37 

36

38 

36 

38 

39 

39

40 

39 

39 

37 

39

39 

40 

39 

40 

40

39 

38 

39 

39 

37

36 

35 

35 

37 

36 

35

38

mm

35 

35

36 

35 

36 

38 

39

39 

38 

37 

37 

37

37 

39 

37 

38 

39

36 

36 

38 

37 

36 

34 

34 

34 

34 

36 

34

36

January

max

34 

34 

35 

34 

33

33 

33 

32 

32 

32

32 

32 

32 

32 

33

32 

32 

32 

32 

32

32 

33 

32 

34 

33 

34 

33 

33

oq

00

33 

33

33

min

34 

34 

34 

33 

33

33 

33 

32 

32 

32

32 

32 

32 

32 

32

32 

32 

32 

32 

32

32 

32 

32 

32 

32

33 

32 

33 

32 

32 

32

32

February

max

32 

32 

33 

33 

33

33 

34 

34 

34 

34

36 

36 

35 

35 

35 

34 

34 

34 

34 

35

36 

35 

34 

34 

34

34 

34 

34

34

miii

32 

32 

33 

33 

33

33 

34 

34 

34 

34

34 

35 

33 

33 

33

32 

32 

32 

32 

32

32 

32 

32 

32 

32 

32 

32 

32

33

March

max

34 

34 

34 

34 

34

34 

34 

34 

34 

34

34 

35 

38 

38 

37

37 

39 

38 

40 

42

40 

40 

40 

40 

41

42 

40 

41 

40 

38 

39

37

min

32 

32 

32 

32 

32

32 

32 

32 

32 

32

32 

32 

32 

33 

32

32 

32 

32 

32 

33

33 

33 

32 

32 

34

34 

33 

32 

34 

32 

34

32

April

max

44 

47 

47 

47 

45

45 

45 

48 

50 

48

49 

50 

51 

50 

49

50 

51 

50 

50 

47

46 

47 

49 

49 

50

50 

50 

48 

47 

46

48

min

33 

34 

34 

34 

34

33 

33 

37 

38 

36

37 

38 

38 

38 

37

38 

39 

38 

38 

37

35 

37 

39 

39 

39 

41 

41 

41 

38 

38

37
COLUMBIA RIVER MAIN STEM 

COLUMBIA RIVER AT MARYHILL FERRY NEAR RUFUS, O

LOCATION. At Maryhill Ferry about 2j miles downstream from Rufus, Sherman County, and about 9 miles up

upstream from Celilo Falls, 3 miles downstream from Deschutes River, and 11 miles east of The Dalles 

DRAINAGE AREA. 237,000 square miles, approximately (above gaging station). 

RECORDS AVAILABLE. Chemical analyses: December 1950 to September 1951.

Water temperatures: December 1950 to September 1951.

EXTREMES,- 1950-51. Dissolved solids: Maximum, 140 ppm Feb. 1, 4-5, 7, 9-10; minimum, 87 ppm May 11-20

Hardness: Maximum, 90 ppm Sept. 11-30; minimum, 56 ppm May 21-31.

Specific conductance: Maximum daily, 225 micromhos Sept. 21, 23; minimum daily, 124 micromhos May 26

Water temperatures: Maximum, 71°F on several days in August; minimum, freezing point Jan. 25, 30.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conduct

Portland, Oreg. Discharge records for gaging station near The Dalles for water year October 1950 to 

records include the inflow of Deschutes River, which on the average amounts to less than 5 percent o

appreciable inflow between Maryhill Ferry and gaging station except during periods of heavy local ra

Chemical analyses, in parts per million, December 1950 to Sept

Date of collection

Dec. 1-10, 1950..... 

Dec. 11-20 .........

Dec. 21-31 .........

Jan. 1-10, 1951 ..... 

Jan. 11-20 .........

Jan. 21-31..........

Feb. 1, 4-5, 7, 9-10 

Feb. 11-15, 18-19,22 

Mar. 21-31 .........

Apr. 1-10........ ...

Apr. 11-20 .........

Apr. 21-30..........

May 1-10 ...........

May 11-20 ..........

May 21-31 ..........

June 1-10 .......

June 11-20..........

June 21-30 ..........

July 1-10 ...........

July U-20 ..........

July 21-31 ..........

Mean 

discharge 

(cfs)

134,000 

130,800 

160,400 

172, 800 

142, 200 

149,600

144, 500 

249, 100 

177,400 

203, 900 

266,800 

288,600

308,900 

507, 100 

578, 100 

489, 800 

440,700 

444,700

386, 900 

350, 300 

301. 500

Silica 

(SiO,)

16 

16 

15 

15 

16 

17

17 

19 

20 

20 

20 

15

17 

14 

11 

11 

10 

8.7

8.1 

8.2 

11

Iron 

(Fe)

0.08 

.08 

.10 

.05 

.10 

.12

.22 

.18 

.18 

.16 

.12 

.09

.07 

.08 

.09 

.03 

.02 

.01

.03 

.03 

.01

Calcium 

(Ca)

22 

21 

22 

20 

22 

22

22 

20 

21 

19 

17 

17

17 

16 

15 

17 

17 

18

20 

21 

22

Magnesium 

(Mg)

6.4 

6.5 

6.1 

6.3 

6.9 

7.0

7.2 

6.9 

7.7 

6.6 

5.7 

4.7

4.9 

4.4 

4.4 

4.6 

4.5 

4.5

5.2 

5.8 

5.9

Sodium 

(Na)

9.0 

8.9 

7.6 

7.2 

8.6 

8.9

9.8 

7.0 

6.0 

6.3 

6.1 

5.2

5.6 

4.7 

5.4 

4.6 

4.4 

4.3

5.4 

6.1 

5.7

Potassium 

(K)

2. 6 

2.6 

2 3 

3! 9 

4.6 

4.2

2.5 

3.8 

4.0 

3.7 

3.5 

2.1

2.2 

3.4 

3.8 

3.2 

2.6 

2.8

1.6 

2.8 

4.6

Bicarbonate 

(HCO,)

90 

92 

89 

87 

95 

96

99 

87 

88 

82

75 

74

72 

66 

65 

70 

70 

73

82 

88 

92

Sulfate 

(S0«)

18 

18 

17 

16 

19 

18

19 

18 

20 

17 

14 

12

12 

11 

11 

11 

10 

11

12 

15

ie

Chloride 

(Cl)

7.0 

5.1 

4.4 

3.6 

4.6 

4.9

5.4 

3.8 

4.6 

4.0 

2.8 

1.9

2.1 

2.1 

3.6 

2.8 

2.2 

2.1

2.2 

4.1

2.8

Fluoi 

ride 

(F)

0.3 

.4 

.4 

.2 

.2 

.3

.3 

.2 

.2 

.2 

.2 

.4

.4 

.4 

.3 

.2 

.2 

.2

.2 

.2 

.3

Nitrate 

(NO,)

1.1 

1.4 

.9 

.9 

1.2 

1.1

1.3 

1.1 

1.7 

.7 

1.3 

1.4

1.4 

1.4 

.8 

.7 

.8 

.8

.6

.7 

.7

Boron 

(B)

Pa

pe

mi

lio

a 

a 

a Sum of determined constituents.
COLUMBIA RIVER MAIN STEM Continued

COLUMBIA RIVER AT MARYHILL FERRY NEAR RUFUS, OREG. C

Chemical analyses, in parts per million, December 1950 to September 1

Date of collection

Aug. 1-10, 1951 ..... 

Aug. 11-20 .........

Aug. 21-31..........

Sept. 1-10 ..........

Sept. 11-20 .........

Sept. 21-30 .........

Weighted average

Mean 

discharge 

(cfs)

236,200 

174, 500 

132,200

125,100 

107,100 

96, 800

b257,100

Silica 

(Si02)

11 

11 

11

11 

12 

14

13

Iron 

(Fe)

0.01 

.01 

.02

.01 

.01 

.02

0.06

Calcium 

(Ca)

22 

22 

23

23 

24 

24

19

Magnesium 

(Mg)

5.6 

6.1 

6.7

6.7 

7.2 

7.3

5.5

Sodium 

(Na)

5.6 

6.7 

8.2

8.4 

10 

9.6

6.0

Potassium 

(K)

3.6 

3.4 

4.8

5.2 

4.6 

5.0

3.3

Bicarbonate 

(HCOS)

88 

90 

98

100 

104 

106

80

Sulfate 

(SO,)

14 

16 

19

20 

22 

22

14

Chloride 

(Cl)

5.1 

3.6 

4.0

4.1 

4.9 

5.4

3.3

Fluoi 

ride 

(F)

0.2 

.2 

.2

.3 

.3

.4

0.3

Nitrate 

(NO,)

0.8 

1.5 

.8

.8 

.8 

.5

1.0

Boron 

(B)

D

(r

Part

per 

mil

lion

1

1

1

1

1

1

1

b Represents 84 percent of runoff for water year October 1950 to September 1951.
COLUMBIA RIVER MAIN STEM 245

COLUMBIA RIVER MAIN STEM--Continued

COLUMBIA RIVER AT MARYHILL FERRY NEAR RUFUS, OREG.--Continued 

Temperature (°F) of water. December 1950 to September 1951

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

Average

Oct. Nov. Dec.

43

-.

45

40

44

42

45

42

45

..

45

42

43

44

44

44

44

44

49

47

48

46

45

48

45

44

45

45

45

43

44

Jan.

45

44

__

43

42

42

40

39

41

40

39

40

--

42

40

41

40

40

42

50

41

51

32

38

39

--

--

32

--

--

Feb.

33

_

39

49

_

40

__

40

40

45

43

41

42

43

..

41

42

__

--

__

46

-.

..

--

Mar.

__

_

..

-.

..

_

_.

_

_

..

--

_

_

..

45

48

46

47

47

50

49

_

--

Apr.

..

_

_

_

--

54

52

52

44

53

54

54

53

54

52

55

55

53

50

50

50

48

_

51

52

53

50

50

52

52

--

52

May

52

54

52

52

54

..

57

58

60

56

54

56

55

56

54

55

57

56

56

57

58

56

56

58

55

56

56

58

55

57

56

June

57

54

57-

55

57

55

56

57

57

59

60

62

62

62

63

62

60

62

63

61

61

62

63

62

62

62

64

63

63

66

--

60

July

67

68

65

64

64

64

64

64

65

64

64

65

65

65

64

66

66

66

66

66

66

66

66

67

67

67

67

67

67

__

68

66

Aug.

69

69

69

69

69

69

68

69

69

69

69

69

71

71

71

69

71

71

69

71

..

71

70

69

68

67

66

66

67

67

66

69

Sept.

67

67

66

66

65

65

65

64

63

64

64

63

62

62

63

62

62

62

62

61

62

63

62

64

63

63

63

63

62

62

--

63
DESCHUTES RIVER BASIN

WARM SPRINGS RIVER AT HEHE MILL, NEAR WARM SP

LOCATION.--Temperature recorder at gaging station, a quarter of a mile east of abondo

ranger station, and 18 miles northwest of Warm Springs, Jefferson County. 

DRAINAGE AREA. 108 square miles.

RECORDS AVAILABLE.--Water temperatures: May 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures-. Maximum, 59 °F July 17; minimum, 33 "F Jan. 17

EXTREMES, May 1950 to September 1951.--Water temperatures: Maximum, 59°F July 5, 6, 

28-30, Feb. 1, Mar. 4, 5, 1951. 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 121

Temperature (°F) of water, water year October 1950 to Se

Day

2

13

i u

jq

Average --

October

max

43 

42 

42 

44 

45

44 

47 

47 

44 

44

45 

45 

45 

46 

45

44 

44 

46 

46 

46

45 

47 

46 

45 

45

45 

43 

43 

42 

42 

42

44

minj

40 

40 

41 

42 

44

42 

43 

44 

41 

43

43 

44 

44 

45 

43

42 

43 

44 

45 

45

45 

45 

44 

43 

45

42 

42 

42 

42 

42 

40

43

November

max

42 

44 

44 

43 

43

43 

44 

44 

41 

39

39 

39 

40 

39 

39

39 

39 

39 

39 

40

40 

41 

41 

43 

43

43 

42 

42 

40 

40

41

min

41 

42 

43 

42 

42

42 

42 

41 

39 

38

38 

38 

39 

38 

38

38 

38 

39 

39 

39

39 

40 

39 

41 

43 

42 

42 

40 

40 

40

40

December

max

40 

40 

40 

40 

40

41 

41 

41 

41 

41

42 

42 

41 

41 

41

41 

41 

41 

41 

41

41 

42 

42 

42 

41

42 

42 

41 

41 

41 

40

41

min

39 

39 

39 

40 

40

40 

41 

41 

41 

41

41 

41 ' 

41 

40 

40

41 

41 

41 

41 

41

40 

40 

42 

41 

41

41 

40 

40 

41 

40 

39

40

January

max

39 

39 

39 

38 

38

38 

37 

38 

38 

38

38 

38 

39 

39 

'37

37 

36 

36 

36 

36

36 

36 

36 

37 

37

37 

37 

35 

33 

33 

33

37

min

38 

39 

38 

38 

38

37 

37 

37 

37 

38

38 

38 

38 

38 

36

36 

33 

34 

36 

36

36 

35 

36 

36 

36

37 

35 

33 

33 

33 

33

36

February

max

34 

35 

36 

36 

36

36 

36 

36 

37 

37

37 

37 

37 

37 

37

37 

37 

37 

37 

37

37 

37 

37 

36 

37

37 

36 

36

36

min

33 

34 

35 

36 

36

36 

36 

36 

36 

36

36 

36 

36 

36 

36

36 

36 

36 

36 

36

37 

37 

35 

35 

36 

35 

35 

35

36

March

max

37 

36 

36 

36 

35

35 

36 

37 

36 

38

38 

40 

40 

40 

38

37 

38 

39 

40 

41

41 

39 

40 

42 

42

42 

42 

42 

42 

43 

43

39

min

36 

35 

35 

33 

33

34 

34 

36 

35 

35

36 

38 

38 

37 

36

35 

36 

36 

37 

38

39 

36 

37 

38 

39

39 

39 

39 

40 

40 

39

37

April 

max

44 

45 

46 

45 

45

45 

45 

46 

45 

45

45 

46 

47 

46 

46 

46 

46 

46 

45 

43

44 

44 

46 

47 

47 

47 

46 

46 

45 

44

45

m
KLICKITAT RIVER BASIN

KLICKITAT RIVER NEAR GLENWOOD, WASH.

LOCATION.--Temperature recorder at gaging station, half a mile downstream from Dairy C

and 7 miles upstream from Trout Creek. 

DRAINAGE AREA. 360 square miles.

RECORDS AVAILABLE. Water temperatures: July 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 57°F July 17, 1951; minimum, freezin

EXTREMES July 1950 to September 1951.--Water temperatures: Maximum, 57°F Aug. 18, 19

Jan. 21, 1951. 

REMARKS.--Records of discharge for water years 1949-50 and 1950-51 given in Water-Supp

Temperature (°F) of water, July 1950 to September 

Day

2

4 _ _ __ _ _ ___ ..

1_ 

8 

10

I 0

20 _-- _ 

99

90

OR

Oft

30

Average -

October

max min

November

max min

December

max min

January

max min

February

max mm

March

max min

April

max min
KLICKITAT RIVER BASIN Continued 

KLICKITAT^RIVER NEAR GLENWOOD, WASH. Con

Temperature (°F)of water, July 1950 to September 1951-

Day

Q

Q

13

21

24

27

o O

Of\

31 

Average 

October

max

43 

42 

43 

45 

46

45 

47 

47 

46 

49

48 

47 

48 

48 

47

44 

45 

45 

46 

46

46 

45 

45 

44 

45 

44 

43 

41 

41 

42 

42

45

min

41 

41 

42 

43 

45

44 

45 

46 

43 

45

46 

47 

47 

47 

45

43 

43

45 

45 

46

43 

44 

44 

43 

44

43 

41 

41 

41 

41 

41

44

November

max

41 

42 

43 

43 

42

42 

42 

42 

40 

38

37 

38 

38 

38 

37

36 

36 

36 

36 

37

38 

39 

39 

39 

40

40 

40 

39 

39 

39

39

min

40 

41 

42 

42 

42

41 

42 

40 

38 

37

37 

37 

37 

37 

35

35 

36 

36 

35 

35

37 

38 

39 

39 

39

40 

39 

39 

39 

37

37

December

max

37 

37 

38 

38 

38

38 

38 

39 

39 

39

39 

39 

39 

38 

39

39 

39 

40 

40 

40

40 

41

37 

38 

38 

37

39

min

37 

37 

37 

38 

37

37 

38 

38 

39 

39

39 

39 

38 

37 

37 

39 

39 

39 

40 

40

40 

40

37 

37 

37 

36

38

January

max

36 

36 

35 

35 

35

35 

33 

34 

34 

35

35 

35 

36 

36 

34

34 

34 

34 

34 

34

33 

33 

35 

36 

36 

36 

35 

33 

32 

32 

32

34

min

36 

35 

35 

35 

35

33 

33 

33 

34 

34

35 

35 

35 

33 

33

32 

32 

33 

33 

32

31 

33 

33 

35 

36 

35 

33 

32 

'32 

32 

32

34

February

max

32 

32 

34 

35 

35

35 

35 

36

37 

36 

37 

37 

37

37 

37 

37 

36 

36

35 

35 

35

"

min

32 

32 

32 

34 

35

33 

34 

35

36 

36 

36 

37 

37

37 

37 

35 

35 

35

34 

33 

33

"

March

max

40 

40'

--

min

39 

38

--

April

max

41 

42 

42 

42 

42

42 

42 

42 

42 

41 

42 

43 

43 

42 

42

43 

43 

43 

42 

41

41 

42 

43 

43 

43

43 

43

42 

42 

42

42

mm

3

3

4

4

4

4

4

4

4

3

3

4

4

4

3

3

4

4

3

3

3

3

4

3

4

4

4

4

4

4

4
KLICKITAT RIVER BASIN Continued 

KLICKITAT RIVER NEAR PITT, WASH.

LOCATION. Temperature recorder at gaging station, 3J miles south of Pitt, Klickitat 

7 miles upstream from mouth at Lyle. Altitude of gage is 285 feet. 

DRAINAGE AREA. 1,290 square miles, approximately.

RECORDS AVAILABLE.--Water temperatures: August 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 66°F July 17, 23, 1951; minimum, 3

EXTREMES, August 1950 to September 1951. Water temperatures: Maximum, 66 "F July 17

REMARKS. Temperatures from Apr. 1 to July 25, 1951, are only fair; probably due to 

Records of discharge for water years 1949-50 and 1950-51 given in Water-Supply Pa

Temperature ("F) of water, August 1950 to Septem

Day

Q

4

5

Q

1 1

1 fl

1*J

23

21

22

24

25

01

Average -

October

max min

November

max min

December

max min

January

max min

February

max min

March

max min

Apri

max 
KLICKITAT RIVER BASIN Continued

KLICKITAT RIVER NEAR PITT, WASH. Cont

Temperature (°F) of water, August 1950 to September 1

Day

2

4 _ _

9

12

21

i)n

9O

t)A

25

97

Qfl

9Q

01

Average -

October

max

48 

46 

47 

47 

47 

47 

47 

47 

46 

47

47 

47 

47 

47 

47

46 

46 

47 

47 

47

47 

47 

46 

46 

46

46 

45 

45 

45 

45 

45

46

min

46 

45 

46 

47 

47 

47 

47 

45 

45 

46

47 

45 

45 

47 

45

45 

45 

46 

47 

47

47 

45 

45 

45 

46

45 

45 

45 

45 

45 

45

46

November

max

45 

45 

46 

47 

47 

45 

46 

46 

46 

43

41 

41 

41 

41 

41

41 

41 

41 

41 

40

42 

43 

43 

43 

43

43 

43 

43 

42 

42

43

min

45 

45 

45 

46 

45 

45 

45 

46 

43 

41

41 

41 

41 

41 

41

41 

41 

41 

40 

40

40 

42 

43 

43 

43

43 

43 

42 

42 

42

43

December

max

42 

41 

41 

41 

41 

41 

40 

41 

41 

41

42 

42 

42 

41 

41

41 

41 

41 

42 

42

42 

43 

43 

43 

43 

43 

43 

43 

43 

43 

43

42

min

41 

41 

41 

41 

41 

40 

40 

40 

41 

41

41 

42 

41 

41 

41

41 

41 

41 

41 

42

42 

42 

43 

43 

43

43 

43 

43 

43 

43 

41

42

January

max

41 

41 

41 

41 

41 

41 

40 

40 

40 

40

40 

41 

41 

41 

39

39 

39 

39 

39 

39

39 

39 

39 

41 

41 

41 

41 

38 

35 

35 

35

40

min

41 

41 

41 

41 

41 

40 

40 

40 

40 

40

40 

40 

41 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

41

41 

38 

35 

35 

35 

35

39

February

max

35 

36 

37 

37 

38 

38 

39 

40 

40 

40

41 

41 

41 

40 

41

41 

40 

41 

41 

41

42 

42 

41 

40 

41

41 

40 

39

40

mm

35 

35 

36 

37 

37 

38 

38 

39 

40 

40

40 

41 

39 

39 

40

40 

40 

40 

41 

41

41 

41 

40 

40 

40

40 

. 39 

39

39

March

max

40 

41 

41 

40 

39 

40 

40 

40 

39 

40

41 

42 

43 

43 

43

42 

42 

43 

43 

44

44 

43 

43 

44 

44

44 

44 

45 

45 

45 

45

42

min

39 

39 

39 

39 

39 

39 

39 

39 

38 

38

39 

41 

41 

43 

42

39 

39 

41 

41 

43

43 

40 

40 

41 

43

43 

43 

44 

45 

45 

44

41

April

max

45 

45 

45 

45 

45 

46 

46 

46 

46 

46

46 

47 

47 

46 

47

47 

47 

47 

46 

44

44 

45 

47 

48 

48 

48 

48 

47 

47 

47

46

m
HOOD RIVER BASIN

GREEN POINT CREEK BELOW NORTH FORK NEAR 

LOCATION. Temperature recorder at gaging station, three-quarters of a mile upstream 

1J miles west of Dee, Hood River County. 

DRAINAGE AREA. 20.0 square miles.

RECORDS AVAILABLE. --Water temperatures: May 1950 to September 1951.

EXTREMES, 1950-51 . Water temperatures: Maximum, 58 °F July 16-18, 22-24, Aug. 21; 

EXTREMES, May 1950 to September 1951. --Water temperatures: Maximum, 58°F July 25, 

35 °F Jan. 28 to Feb. 3, 1951. 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 1

Temperature (°F) of water, water year October 1950 to 

Day

Q

Q

23

28

31

October

max

47 

46 

46 

46 

48 

48 

49 

50 

50 

50

50 

50 

50 

50 

50

49 

49 

49 

50 

50

50 

49 

49 

49 

49 

49 

49 

49 

49 

49 

48

49

min

46 

46 

46 

46 

46 

48 

48 

49 

49 

49

50 

50 

50 

50 

49

49 

49 

49 

49 

50

49 

49 

49 

49 

49 

48 

49 

49 

49 

48 

47

48

November

max

47 

47 

48 

49 

49 

49 

49 

49 

47 

44

43 

43 

43 

43 

43

41 

41 

42 

42 

42

43 

43 

43 

43 

43 

43 

43 

43 

43 

43

44

min

47 

47 

47 

48 

49 

49 

49 

47 

44 

43

43 

43 

43 

43 

40

40 

41 

41 

42 

42

42 

42 

43 

43 

43 

43 

43 

43 

43 

41

44

December

max

41 

41 

41 

41 

41 

39 

39 

40 

40 

40

41 

41 

41 

41 

40

40 

40 

40 

40 

41

41 

42 

42 

42 

42 

42 

42 

42 

42 

42 

41

41

min

41 

41 

41 

41 

39 

38 

38 

39 

40 

40

40 

41 

41 

40 

40 

40 

40 

40 

40 

40

41 

41 

42 

42 

42 

42 

42 

42 

42 

41 

41

41

January

max

41 

41 

41 

41 

40

40 

40 

39 

39 

39

39 

39 

39 

39 

38

38 

38 

38 

38 

38

37 

38 

38 

38 

38 

38 

38 

37 

35 

35 

35

38

min

41 

41 

41 

40 

40 

40 

39 

39 

39 

39

39 

39 

39 

38 

38

37 

37 

38 

38 

37

37 

37 

38 

38 

38 

38 

37 

35 

35 

35 

35

38

February

max

35 

35 

37 

38 

38 

38 

38 

38 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

38 

38 

38 

38 

38

38

min

35 

35 

35 

37 

38 

38 

38 

38 

38 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

38 

38 

38 

38 

38 

38

38

March

max

38 

38 

38 

38 

37 

36 

37 

37 

36 

37

38 

38 

38 

39 

39

38 

38 

39 

40 

40

40 

40 

40 

40 

41 

41 

41 

41 

41 

41 

41 j

39

min

38 

38 

38 

37 

36 

36 

36 

36 

36 

36

37 

38 

38 

38 

37

37 

38 

38 

39 

39

40 

39 

39 

40 

40 

41 

41 

41 

41 

40 

40

38

Apr

max

42 

42 

42 

42 

42 

42 

42 

42 

42 

42

42 

43 

44 

43 

43

43 

43 

43 

42 

41

41 

42 

42 

43 

44 

44 

44 

43 

42 

41

42
SANDY RIVER BASIN 

BULL RUN RIVER AT BULL RUN, OREG.

LOCATION. Temperature recorder at gaging station at Bull Run, Clackamas County, 450 

Electric Co.'s power plant, and 1.5 miles downstream from Little Sandy River. 

DRAINAGE AREA . 136 square miles.

RECORDS AVAILABLE.--Water temperatures: August 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 64°F Aug. 19; minimum, 35°F Jan. 3

EXTREMES, August 1950 to September 1951.--Water temperatures: Maximum, 65°F Aug. 22

REMARKS.--Records of discharge for water year 1950-51 given in Water-Supply Paper 12

Temperature (°F) of water, August 1950 to Septemb

Day

g

12

13

20

21

22

24

29

01

Average --------

October

max min

November

max mm

December

max min

January

max mm

February

max min

March

max min

April

max m
SANDY RIVER BASIN Continued 

BULL RUN RIVER AT BULL RUN, OREG.--Continue

Temperature (°F) of water, August 1950 to September 1951--

Day

3

13

i«

i q

22

2 5

27

no

29

Average -

October

max

51 

51 

50 

51 

52

51 

51 

52 

52 

51

52 

52 

53 

54 

52

51 

51 

50 

50 

50

50 

50 

50 

50 

50 

49 

48 

47 

47 

46 

46

50

min

49 

48 

48 

48 

50

50 

50 

51 

51 

51

51 

52 

52 

52 

50

50 

49 

50 

50 

50

49 

49 

49 

49 

49

48 

47 

46 

46 

46. 

45

49

November

max

45 

45 

46 

46 

46

46 

46 

46 

46' 

43

41 

42 

41 

41 

41

41 

42 

42 

42 

42

43 

43 

43 

42 

42

43 

43 

43 

42 

42

43

min

45 

45 

45 

46 

46

46 

46 

46 

43 

41

41 

41 

40 

40 

40

41 

41 

41 

41 

42

42 

43 

42 

42 

42

42 

43 

42 

42 

42

43

December

max

42 

41 

41 

41 

41

42 

42 

43 

43 

43

44 

44 

44 

43 

43 

43 

43 

43 

44 

44

44 

44 

44 

44 

44

44 

44 

44 

44 

44 

44

43

min

41 

41 

41 

41 

41

41 

42 

42 

43 

43

43 

44 

43 

43 

43 

43 

43 

43 

43 

44

44 

44 

44 

44 

44

44 

44 

44 

44 

44 

43

43

January

max

43 

43 

43 

43 

43

43 

41 

41 

40 

41

41 

41 

41 

41 

40 

40 

40 

40 

40 

40

40 

40 

40 

41 

41

41 

41 

40 

38 

38 

35

41

min

43 

43 

43 

43 

43

41 

40 

40 

40 

40

41 

41 

41 

40 

40

40 

40 

40 

40 

40

40 

40 

40 

40 

41

41 

40 

38 

36 

35 

35

40

February

max

36 

37 

37 

38 

38

39 

39 

40 

40 

40

40 

40 

40 

41 

41

41 

41 

41 

41 

41

41 

41 

41 

40 

40

40 

40 

39

40

min

35 

36 

37 

37 

38

38 

39 

39 

40 

40

40 

40 

40 

40 

40 

41 

41 

41 

41 

41

41 

40 

40 

40 

40

39 

39 

39

39

March

max

39 

39 

39 

39 

37

37 

37 

38 

37 

37

38 

39 

39 

39 

39

39 

40 

41 

42 

43

43 

42 

42 

42 

42

42 

43 

43 

42 

42 

43

40

min

'39 

39 

39 

37 

36

36 

36 

36 

36 

37

37 

38 

39 

39 

39

39 

39 

39 

40 

40

41 

40 

40 

40 

40 

41 

41 

41 

42 

41 

41

39

April

max

44 

44 

45 

44 

44

44 

44 

44 

44 

45

47 

47 

46 

47 

47

47 

46 

45 

44 

44

45 

46 

46 

48 

48

48 

48 

46 

45 

44

46

m
WILLAMETTE RIVER BASIN 

MIDDLE FORK WILLAMETTE RIVER BELOW NORTH FORK N

LOCATION.--Temperature recorder at gaging station, half a mile below'Whitehead Creek

River, and 7 miles northwest of Oakridge, Lane County. 

DRAINAGE AREA.--924 square miles.

RECORDS AVAILABLE. Water temperatures: September 1950 to April 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 54°F Oct. 13; minimum, 35°F Jan. 2

EXTREMES, September 1950 to April 1951.--Water temperatures: Minimum, 35°F Jan. 29-

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 12

Temperature (°F) of water September 1950 to Apr

Day

1 1

1 fl

jq

20

29

31 ...

Average - 

September

max

57 

57 

56 

57 

57

55 

55 

54 

52 

50

--

mm

53 

53 

53 

54 

55

53 

52 

51 

49 

47

"

October

max

50 

49 

49 

51 

51

50 

52 

52 

51 

53 

52 

52 

54 

53 

52

51 

50 

51 

51 

51

51 

51 

52 

51 

50

49 

48 

47 

47 

46 

46

50

min

47 

47 

47 

49 

50

49 

50 

51 

49 

50 

50 

51 

52 

52 

51

50 

50 

49 

50 

51

50 

51 

50 

50 

49

48 

47 

47 

46 

46 

45

49

November

max

47 

47 

47 

47 

48

48 

47 

49 

48 

45 

44 

45 

45 

44 

44

44 

45 

44 

45 

45

45 

45 

44 

44 

44

44 

44 

44 

43 

43

45

min

46 

46 

47 

47 

47

47 

47 

47 

45 

43 

43 

44 

44 

44 

43

43 

44 

44 

44 

45

44 

44 

43 

43 

44

44 

44 

43 

42 

42

44

December

max

43 

42 

42 

43 

43

44 

44 

44 

44 

44 

44 

44 

44 

44 

44

44 

44 

44 

44 

44

44 

44 

44 

44 

44

43 

42 

42 

44 

44 

42

44

min

42 

42 

42 

42 

43

43 

44 

44 

44 

44 

44 

44 

42 

42 

44

44 

44 

44 

44 

44

43 

43 

44 

44 

43

42 

42 

42 

42 

42 

42

43

January

max

42 

42 

42 

42 

42

42 

41 

41 

41 

42 

42 

42 

41 

42 

42

41 

41 

40 

40 

40

40 

41 

41 

42 

42

42 

42 

41 

37 

35 

35

41

min

42 

42 

42 

42 

42

41 

40 

40 

41 

41 

42 

41 

41 

41 

41

40 

40 

40 

40 

40

40 

40 

41 

41 

41

41 

41 

37 

35 

35 

35

40

February

max

36 

36 

38 

40 

41

41 

43 

42 

43 

42 

42 

43 

42 

42 

42

41 

40 

40 

40 

40

41 

40 

40 

39 

39

39 

39 

40

40

min

35 

36 

36 

38 

40

41 

41 

42 

42 

42 

42 

42 

41 

41 

41

40 

40 

39 

39 

40

40 

40 

38 

38 

39

38 

38 

38

40

March

max

39 

38 

38 

36 

36

35 

36 

37 

37 

38 

38 

39 

42 

42 

42

40 

41 

42 

42 

43

42 

41 

42 

43 

43

44 

44 

43 

43 

42 

44

40

m
WILLAMETTE RIVER BASIN--Continu

MIDDLE FORK WILLAMETTE RIVER AT LOWEL

LOCATION. Temperature recorder at gaging station three-quarters of a mile south of 

Lost Creek.

DRAINAGE AREA. 994 square miles.

RECORDS AVAILABLE. Water temperatures: October 1950 to September 1951. 

EXTREMES. rfater temperatures: Maximum, 72 °F July 16; minimum, 35°F Jan. 29-31, Mar

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 12

Temperature (°F) of water, water year October 1950 to 

Day

O

g

13

22

oo

oc

29

Average 

October

max

49 

52 

52

52 

54 

54 

52 

53

54 

54 

55 

54 

53

52 

51 

51 

51 

51

51 

52 

53 

53 

52

50 

48 

48 

47 

47 

47

51

mm

48 

49 

52

51 

51 

52 

51 

52 

52 

52 

53 

53 

52

51 

51 

50 

51 

51

51 

51 

52 

52 

50

48 

48 

47 

47 

46 

46

50

November

max

46 

47 

47 

47 

48

48 

48 

48 

48 

44

43 

45 

45 

44 

43

43 

44 

44 

44 

45

45 

44 

44 

45 

45

45 

45 

45 

43 

43

45

min

46 

46 

47 

47

47

48 

47 

47 

44 

43

43 

43 

44 

43 

43

43 

43 

44 

44 

44

44 

44 

43 

43 

45

45 

45 

43 

43 

43

44

December

max

43 

42 

43 

44 

44

44 

44 

44 

45 

45

45 

45 

45 

45 

46

46 

46 

46 

46 

46

46 

45 

46 

46 

45

44 

43 

43 

44 

44 

43

45

min

42 

42 

42 

43 

44

44 

44 

44 

44 

45 

45 

45 

44 

44 

45

46 

46 

46 

46 

46

45 

45 

45 

45 

44

43 

43 

43 

43 

43 

43

44

January

max

43 

43 

43 

43 

43

43 

42 

42 

42 

43

43 

43 

42 

43 

43

43 

42 

42 

42 

42

42 

42 

42 

43 

43

42 

42 

42 

38 

35 

37

42

min

43 

43 

43 

43 

43 

42 

41 

41 

42 

42

43 

42 

42 

42 

43

42 

42 

42 

42 

41

41 

42 

42 

42 

42

42 

42 

38 

35 

35 

35

41

February

max

39 

40 

40 

41 

42 

42 

42 

43 

43 

43

43 

43 

43 

43 

43

42 

41 

41 

41 

41

41 

42 

42 

41 

40

40 

40 

41

42

min

37 

39 

40 

40 

41

42

42 

42 

43 

43

43 

43 

42 

42 

42

41 

41 

41 

41 

41

41 

41 

40 

40 

40

40 

39 

40

41

March

max

41 

40 

40 

38 

37

36 

38 

40 

40 

40

40 

40 

45 

44 

44

42 

43 

43 

43 

44

44 

44 

43 

44 

44

45 

45 

45 

44 

44 

46

42

min

40 

39 

38 

37 

36

35 

36 

38 

39 

39

39 

40 

40 

42 

42

41 

41 

41 

40 

42

43 

42 

41 

42 

43

44 

44 

43 

44 

43 

43

42

April

max

46 

47 

48 

48 

48

48 

47 

47 

47 

47

49 

49 

49 

49 

49

49 

49 

49 

49 

49

48 

48 

50 

50 

52

52 

49 

47 

47 

47

48

m
WILLAMETTE RIVER BASIN Continued 

FALL CREEK BELOW WINBERRY CREEK NEAR FALL CR

LOCATION. Temperature recorder at gaging station, li miles downstream from Winberry C

Lane County.

DRAINAGE AREA. 190 square miles.

RECORDS AVAILABLE. Water temperatures: August 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 74°F July 17; minimum, 34°F Jan. 30, 

EXTREMES, August 1950 to September 1951.--Water temperatures: Maximum, 74°F Aug. 17, 

Jan. 30, 31, 1951. 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 1218

Temperature (°F) of water, August 1950 to Septembe

Day

2

3

Q

13

J.Q

22

24

29

30

 3 1

Average -------

October

max mm

November

max mm

December

max mm

January

max mm

February

max mm

March

max min

April

max mi
WILLAMETTE RIVER BASIN--Continu

FALL CREEK BELOW WINBERRY CREEK NEAR FALL CRE

Temperature (°F) of water, August 1950 to Septembe

Day

o

21

22

OC

29

01"* 

Average -- -

October

max

51 

49 

50 

52 

52

52 

53 

53 

53 

53 

52 

53 

53 

53 

53

52 

50 

51 

51 

51

51 

51 

52 

52 

51

50 

48 

48 

48 

47 

47

51

min

48 

48 

48 

50 

52

51 

51 

53 

51 

51 

51 

51 

52 

53 

52

50 

50 

50 

51 

51

51 

51 

51 

51 

50

48 

48 

47 

47 

47 

46

50

November

max

46 

47 

48 

48 

48

48 

48 

47 

47 

42

42 

43 

43 

41 

41

42 

43 

43 

43 

43

43 

43 

43 

45 

45 

45 

45 

44 

43 

42

44

min

46 

46 

47 

47 

48

48 

47 

46 

42 

41

41 

41 

41 

40 

40

41 

42 

43 

43 

42

43 

43 

41 

42 

45

45 

44 

43 

42 

42

43

December

max

41 

41 

42 

43 

43

41 

44 

44 

44 

44

44 

44 

44 

43 

44

44 

44 

44 

45 

44

44 

45 

45 

45 

44

44 

43 

44 

44 

44 

43

44

mm

41 

41 

41 

42 

43

43 

44 

44 

44 

44

44 

44 

43 

43 

43

44 

44 

44 

44 

44

43 

43 

45 

44 

44

43 

43 

43 

44 

43 

42

43

January

max

42 

42 

43 

42 

43

42 

40 

40 

41 

42

42 

42 

42 

43 

43

43 

42 

43 

42 

42

42 

42 

42 

43 

43

43 

43 

42 

37 

34 

36

42

min

42 

42 

42 

42 

42

40 

39 

39 

40 

41

42 

40 

42 

42 

42

42 

42 

42 

42 

42

42 

42 

42 

42 

43

43 

42 

37 

34 

34 

34

41

February

max

38 

39 

40 

41 

43

43 

44 

44 

45 

45

45 

45 

44 

44 

44

43 

41 

41 

41 

41

41 

41 

40 

40 

39

40 

40 

40

42

min

36 

38 

39 

39 

41

43 

43 

44 

44 

45

45 

44 

43 

43 

43

40 

41 

41 

40 

41

41 

40 

39 

39 

39

39 

38 

38

41

March

max

40 

39 

38 

37 

38

38 

39 

40 

39 

40 

41 

41 

43 

43 

43

42 

43 

43 

44 

44

44 

43 

42 

43 

43

44 

44 

44 

44 

43 

44

42

min

39 

38 

37 

33 

37

36 

36 

39 

39 

39

39 

41 

41 

42 

42

42 

42 

41 

42 

42

43 

42 

40 

41 

42 

42 

42 

42 

43 

42 

42

40

A

max

4

4

4

4

4

4

4

4

4

4

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

4

4

4

5
WILLAMETTE RIVER BASIN Continue

LOOKOUT CREEK NEAR BLUE RIVER, OR

LOCATION.--Temperature recorder at gaging station, 0.4 mile upstream from mouth, a

Lane County.

DRAINAGE AREA. 24.1 square miles.

RECORDS AVAILABLE. Water temperatures: August 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 64°F July 16-18, 23; minimum, 33

EXTREMES, August 1950 to September 1951.--Water temperatures: Maximum, 64°F July 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 

Temperature (°F) of water, August 1950 to Septe

Day

O

o

12

jq

21

23

25

9ft

29

30

October

max min

November

max min

December

max min

January

max min

February

max min

March

max min

Ap

max 
WILLAMETTE RIVER BASIN--Continued

LOOKOUT CREEK NEAR BLUE RIVER, OREG. C

Temperature (°F) of water August 1950 to September 19

Day

0

12

13

jq

22

25

27

28

29

30

Average --

October

max

49 

48 

48 

49 

49 

48 

49 

 49 

49 

49

49 

50 

50 

50 

50

49 

48 

49 

49 

49

49 

48 

48 

48 

48

47 

46 

45 

45 

45 

43

48

min

47 

46 

47 

48 

48 

48 

48 

49 

48 

48

48 

49 

49 

50 

49

48 

48 

48 

49 

49

47 

48 

48 

48

47

46 

45 

44 

45 

43 

43

47

November

max

44 

45 

45 

46 

46 

46 

45 

46 

44 

43

43 

43 

42 

41 

41

41 

42 

42 

42 

42

43 

43 

42 

42 

43

43 

43 

44 

43 

43

43

mm

43 

44 

45 

45 

45 

45 

45 

44 

43 

42

42 

42 

41 

41 

41

41 

41 

42 

42 

42

42 

42 

42 

42 

42

43 

43 

43 

43 

43

43

December

max

43 

42 

42 

43 

43 

44 

44 

44 

45 

45

45 

45 

45 

44 

44

44 

44 

44 

44 

45

45 

44 

44 

44

44

44 

43 

43 

43 

43 

41

44

min

42 

42 

41 

42 

43 

43 

44 

44 

44 

45

45 

45 

44 

44 

44

44 

44 

44 

44 

44

44 

44 

44 

44 

44

43 

43 

42 

43 

41 

41

43

January

max

41 

41 

42 

42 

42 

41 

41 

41 

41 

41

41 

41 

41 

41 

42

41 

40 

39 

39 

39

40 

40 

40 

41 

41

41 

41 

40 

36 

35 

36

40

min

41 

40 

41 

42 

41 

41 

40 

40 

41 

41

41 

41 

41 

41 

41

40 

38 

39 

39 

39

39 

40 

40 

40 

41

41 

40 

36 

35 

35 

35

40

February

max

37 

38 

39 

40 

41 

41 

41 

41 

41 

41

41 

41 

41 

41 

41 

40 

40 

39 

39 

39

40 

40 

39 

39 

39

38 

38 

38

40

nun

36

37 

38 

39 

40 

41 

41 

41 

41 

41

41 

41 

41 

41 

40

39 

39 

39 

39 

39

39 

39 

38 

39 

38

38 

37 

37

39

March

max

38 

37 

37 

34 

34 

34 

35 

35 

36 

37

37 

37 

38 

39 

39

39 

39 

40 

40 

40

40 

39 

40 

40 

40

41 

41 

41 

40 

40 

41

38

mm

37 

37 

33 

33 

33 

33 

34 

35 

35 

35

36 

37 

37 

38 

38

38 

39 

39 

39 

39

40 

39 

38 

39 

39

40 

39 

39 

39 

39 

39

37

Apri

max

41 

41 

41 

41 

41 

41 

41 

41 

41 

41

42 

42 

42 

42 

42

43 

43 

42 

43 

41

42 

43 

44 

45 

46

45 

44 

43 

42 

42

42
WILLAMETTE RIVER BASIN--Conti

NORTH SANTIAM RIVER BELOW BOULDER CREEK NEA

LOCATION.--Temperature recorder at gaging station, half a mile downstream from Bou

Marion County.

DRAINAGE AREA. 216 square miles.

RECORDS AVAILABLE.--Water temperatures: April to September 1951. 

EXTREMES. Water temperatures: Maximum, 59°F July 16-18, 22-24, 27, Aug. 1. 

REMARKS. Record of discharge for water year 1950-51 at site 2 miles downstream gi

Temperature (°F) of water, April to Septemb

Day

2

2

4 _ _ __

Q

1 0

21

22

no

31 

Average -- --

October

max mm

November

max min

December

max mm

January

max min

February

max min

March

max mm

Ap

max

4

44 

4

4

4

40

__
WILLAMETTE RIVER BASIN--Continued

BREITENBUSH RIVER ABOVE CANYON CREEK NEAR DETROIT, 

LOCATION. Temperature recorder at gaging station, 600 feet upstream from mouth of Can

Marion. County.

DRAINAGE AREA. 106 square miles.

RECORDS AVAILABLE. Water temperatures: December 1950 to September 1951. 

EXTREMES.--Water temperatures: Maximum, 58°F July 17; minimum, 33°F Mar. 3-7. 

REMARKS.--Records of discharge for water year 1950-51 at site 500 feet downstream from 

Temperature (°F) of water, December 1950 to September 19

Day

2

q

4

24

29

11

Average -----

October

max min

November

max min

December

max

--

43 

44 

44 

44 

44

44 

43 

43 

43 

43 

42

min

43 

43 

44 

44 

44

43 

43 

42 

42 

42 

42

January

max

42 

42 

42 

42 

42

42 

41 

42 

42 

42

41 

41 

41 

40 

41

40 

39 

39 

39 

39

39 

40 

40 

39 

40

41 

41 

39 

35 

35 

35

40

mm

42 

41 

42 

42 

42

41 

40 

40 

42 

42

40 

40 

40 

40 

40

39 

39 

39 

39 

39

39 

39 

39 

39 

39

40 

39 

35 

35 

35 

35

39

February

max

37 

37 

38 

39 

39

39 

39 

39 

40 

40

40 

40 

40 

39 

39

39 

39 

38 

38 

39

39 

39 

38 

38 

38

38 

38 

36

39

mm

35 

37 

37 

38 

38

39 

39 

39 

39 

40

40 

40 

39 

39 

39

39 

38 

38 

38 

38

38 

38 

38 

38 

38

38 

36 

36

38

March

max

37 

37 

36 

35 

34

34 

34 

34 

35 

36

36 

37 

38 

38 

38

37 

38 

38 

37 

40

39 

39 

39 

39 

40

40 

40 

40 

40 

39 

40

38

min

36 

36 

33 

33 

33

33 

33 

34 

34 

35

36 

36 

37 

38 

36

36 

37 

38 

36 

38

39 

38 

38 

38 

38

39 

39 

38 

38 

38 

39

36

April

max

40 

41 

41 

41 

41

41 

42 

42 

42 

42

42 

43 

43 

43 

43

43 

43 

43 

42 

41

42 

42 

43 

43 

44

43 

42 

40 

40 

40

42

min

3

3

3

39 

3

39 

40 

3

3

40

40 

40 

40 

40 

40

40 

40 

4

4

4

3

3

4

4

4

4

4

4

4

3

4
WILLAMETTE RIVER BASIN Continued 

WILLAMETTE RIVER AT SALEM, OREG.

LOCATION.--At bridge on Oregon Highway 22, Polk-Marion County line, 300 feet downstream from gaging stat

DRAINAGE AREA.--7,280 square miles, approximately.

RECORDS AVAILABLE. Chemical analyses: August to December 1910, August 1911 to August 1912, February to 

Water temperatures: February to September 1951. 

EXTREMES, February to September 1951.--Dissolved solids: Maximum, 65 ppm July 11-31, Sept. 16-20, 24-29

Hardness: Maximum, 28 ppm Sept. 16-20, 24-29; minimum, 18 ppm Mar. 11-31, Apr. 21-30, May 11-20.

Specific conductance: Maximum daily, 77.4 micromhos Aug. 17; minimum daily, 40.9 micromhos Feb'. 8.

Water temperatures: Maximum, 75°F June 28-30.

REMARKS. Values reported for dissolved solids are residue on evaporation. Records of specific conducta

Portland, Oreg. Records of discharge for water year October 1950 to September 1951 given in Water-Su

Chemical analyses, February to September 1951

Date of collection

Feb. 1-10, 1951..

Feb. 21-28. ......

Mar. 11-20 ......

Mar. 21-31 ......

J.pr. 1-10........

Apr. 11-20... ....

May 1-10 ........

May 21-31 .......

June 11-20... ....

July 1-10 ........

July 21-31 .......

Aug. 1-10........

Aug. 11-17... ....

Sept. 1-3, 5, 11-

Sept. 16-20, 24- 

29. .............

Mean 

discharge 

(cfs)

72, 500 

64,610 

29,390 

30,910 

50,970 

35,140

29,020 

27,950 

19,070 

22,980 

25,670 

17, 560

11,270 

9,378 

7,366 

6,455 

5,437 

4,674

4,264 

4,386 

4,575

4,567 

4,236

Silica 

(Si02)

15 

16 

18 

17 

16 

17

16 

16 

16 

17 

17 

18

19 

20 

20 

20 

22 

20

19 

18 

18

18 

18

Iron 

(Fe)

0.16 

.09 

.12 

.16 

.18 

. 10

.06 

.05 

.05 

.07 

. 12 

.05

.07 

.05 

.05 

.07 

.04 

.04

.09 

.05 

.10

.12 

.07

Calcium 

(Ca)

4.6 

4.7 

5.0 

4.8 

4.1 

4.2

4.6 

5.2 

4.5 

4.4 

4.4 

4.4

5.0 

5.4 

5.7 

5.9 

6.6 

6.3

6.1 

6.2 

6.1

6.1 

6.7

Magnesium 

(Mg)

1.9 

1.9 

2.1 

2. 1 

1.8 

1.8

2.1 

2.1 

1.6 

2.0 

1.7 

1.9

2.0 

2.0 

2.1 

2.0 

2.1 

2.2

2.4 

2.4 

2.4

2.7 

2.7

Sodium 

(Na)

3.5 

3.3 

3.3 

3.0 

3.0 

3.0

2.9 

3.0 

2.8 

3.2 

3.5 

3.8

3.9 

3.2 

3.0 

3.1 

3.8 

3.9

4.5 

5.0 

4.9

4.3 

4.5

Potassium 

(K)

2.2 

2.4 

2.4 

1.8 

1.9 

2.2

3.0 

3.4 

3.5 

2.2 

2.7 

1.8

2.6 

1.9 

1.8 

2.1 

2.1 

1.4

2.1 

2.7 

3.0

3.8 

3.2

Bicarbonate 

(HCO,)

27 

27 

30 

28 

26 

27

28 

29 

27 

26 

26 

29

30 

31 

32 

34 

36 

37

38 

36 

37

37 

40

Sulfate 

(S04 )

2.7 

2.3 

2.1 

2.6 

2.3 

1.8

2.1 

1.8 

1.8 

2.2 

1.7 

2.5

2.5 

2.7 

2.3 

1.7 

2.4 

2.4

2.6 

2.9 

2.5

3.2 

3.2

Chloride 

(Cl)

3.3 

2.3 

2.3 

2.7 

2.2 

2.3

2.2 

1.7 

1.8 

2.0 

2.0 

2.0

2.1 

2.4 

2.6 

2.3 

3.0 

2. 8

3.2 

3.2 

3.6

3.6 

4.1

Fluo* 

ride 

(F)

0.0 

.0 

.2 

.2 

.2 

.2

. 5 

.3 

. 1 

.5 

. 5 

. 5

. 5 

.2 

.2 

.2 

.2 

.2

.1 

. 1 

.1

.3 

.1

Nitrate 

(N03 )

0.5 

.5 

.8 

.6 

.6 

.6

.4 

.3 

.3 

.5 

.6 

.6

.9 

.5 

.5 

.7 

.6 

.5

. 5 

.6

.7

.8 

.6

Boron 

(B)

(

Par

pe

mil

lio
WILLAMETTE RIVER BASIN 263

WILLAMETTE RIVER BASIN Continued 

WILLAMETTE RIVER AT SALEM, OREG. Continued 

Temperature (°F) of water, February to September 1951

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

Average

Oct. Nov. Dec. Jan. Feb.

36

38

.41

42

42

43

46

46

47

48

47

47

46

45

46

45

45

43

43

43

44

44

43

45

43

42

42

42

--

--

--

44

Mar.

42

42

--

"

38

38

38

38

38

39

42

44

44

46

43

43

46

45

46

45

45

44

46

46

46

49

48

48

46

46

44

Apr.

47

48

50

52

51

50

51

51

51

51

52

53

53

54

53

53

52

52

52

50

52

52

53

53

52

52

53

52

52

50

~

52

May

49

50

51

55

54

52

54

55

56

_

51

52

51

53

52

59

61

61

62

61

60

60

59

58

58

59

59

56

June

..

61

63

64

60

59

60

65

66

66

65

66

69

71

69

69

69

69

~

70

70

70

70

70

70

72

75

75

75

68

July

..

69

69

64

63

64

66

67

68

69

71

71

71

70

71

70

70

70

71

70

70

69

70

70

70

70

71

69

Aug.

70

70

71

70

73

71

70

70

70

68

67

70

70

71

-.

70

68

..

67

64

62

62

--

Sept.

65

64

64

69

69

69

69

69

68

68

68

68

66

66

.-

--

62

65

62

61

60

--

--
LEWIS RIVER BASIN 

LEWIS RIVER AT ARIEL, WASH.

LOCATION. Temperature recorder at gaging station at Ariel, Cowlitz County, half 

miles upstream from Cedar Creek. 

DRAINAGE AREA . 731 square miles.

RECORDS AVAILABLE. Water temperatures: October 1950 to June, 1951

EXTREMES, 1950-51.--Water temperatures: Maximum, 55°F Oct. 6-9, 1950; minimum, 

REMARKS.--Records of discharge for water year October 1950 to September 1951 giv

Temperature (°F) of water, October 1950 t

Day

Q

13

22

24

29

31 ..... 

Average --- --

October

max

54 

54 

54 

54

55 

55 

55 

55 

54

54 

54 

54 

54 

54

53 

53 

53 

53 

53

53 

52 

52 

52 

52

52 

52 

52 

52 

52 

50,

53

min

54 

54 

54 

54

54 

54 

54 

54 

54

54 

54 

54 

54 

53

53 

53 

53 

53 

53

52 

52 

52 

52 

52

52 

52 

52 

52 

50 

49

53

November

max

49 

49 

49 

49 

48

47 

47 

47 

47

47

47 

47 

46 

46 

45 

44 

44 

44 

44 

43

43 

43 

43 

44 

44

43 

43 

43 

43 

43

45

min

49 

49 

49 

48 

47

47 

47 

47 

47 

46

46 

46 

46 

45 

44

44 

44 

44 

43 

43

43 

43 

43 

43 

43

43 

43 

43 

43 

43

45

December

max

43 

43 

43 

43 

43

43 

43 

43 

43 

43

43 

43 

43 

43 

43

43 

42 

42 

42 

42

42 

42 

42 

42 

42

42 

42 

42 

42 

42 

42

43

min

43 

43 

43 

43 

43

43 

43 

43 

43 

43

43 

43 

43 

43 

43

42 

42 

42 

42 

42

42 

42 

42 

42 

42

42 

42 

42 

42 

42 

42

42

January

max

42 

42 

42 

42 

42

42 

42 

42 

42 

42

42 

42 

42 

41 

41

41 

41 

41 

41 

41

40 

40 

40 

40 

40

40 

40 

39 

39 

39 

39

41

min

42 

42 

42 

42 

42

42 

42 

42 

42 

42

42 

42 

41 

41 

41

41 

41 

41 

41 

40

40 

40 

40 

40 

40

40 

39 

39 

39 

39 

39

41

February

max

39 

39 

38 

38 

38

38 

37 

37 

37 

37

37 

37 

37 

37 

37

38 

38 

38 

39 

39

39 

39 

39 

39 

39

39 

39 

39

38

min

39 

38 

38 

38 

38

37 

37 

37 

37 

37

37 

37 

37 

37 

37

37 

38 

38 

38 

39

39 

39 

39 

39 

39

39 

39 

39

38

March

max

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

40

40 

39 

39 

40 

39

39

min

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39 

39 

39 

39 

39

39

ma
LEWIS RIVER BASIN Continued 

EAST FORK LEWIS RIVER NEAR HEISSON, WA

LOCATION.--Temperature recorder at gaging station just downstream from Basket Creek, 

20 miles upstream from mouth. 

DRAINAGE AREA. 125 square miles.

RECORDS AVAILABLE. Water temperatures: June 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 71°F July 13, 14, 16, 17, 23, Aug. 

EXTREMES, June 1950 to September 1951.--Water temperatures: Maximum, 71"F July 13, 1

Jan. 31, Feb. 1, 1951. 

REMARKS.--Records of discharge for water year October 1950 to September 1951 given in 

Temperature (°F) of water, water year October 1950 to Se

Day

2

o

5

Q

12

1 o

22

25

no

9Q

01

October

max

49 

48 

47 

50 

50

49 

51 

51 

49 

50

51 

52 

52 

52 

52

49 

49 

49 

49 

49

49 

47 

48 

48 

49

48 

47 

47 

47 

47 

46

min

47 

46 

46 

47 

49

49 

49 

49 

48 

49

50 

51 

52 

52 

49

49 

49 

49 

49 

49

47 

47 

47 

47 

48

47 

47 

47 

47 

46 

46

A.O

November

max

46 

47 

49 

49 

48

47 

47 

47 

45 

43

43 

43 

43 

42 

42

43 

44 

44 

44 

45

45 

45 

45

47

47 

47 

46 

46 

44

min

46 

46 

47 

48 

47

47 

47 

45 

43 

42

42 

43 

41 

42 

41

42 

43 

44 

42 

43

45 

45 

44

46 

47 

46 

46 

44 

44

December

max

44 

44 

46 

46 

46

45 

45 

45 

46 

46

46 

46 

46 

44 

45

46 

46 

46 

46

47

47 

48 

48 

46 

45

45 

44 

44 

45 

45 

43

min

44 

44 

44 

46 

44

44 

45 

45 

45 

46

46 

46 

43 

44 

44

45 

46 

46 

46 

46

46 

46 

46 

45 

45

44 

44 

44 

44 

43 

43

January

jnax

43 

43 

43 

43 

43

43 

41 

41 

41 

41

41 

41 

42 

42 

42

41 

41 

41 

41 

40

41 

41 

41 

43 

43

43 

42 

39 

34 

34 

34

min

43 

43 

43 

43 

43

41 

40 

40 

41 

41

41 

41 

41 

41 

41

41 

41 

41 

40 

40

40 

41 

41 

41 

43

42 

39 

34 

34 

34 

33

February

max

37 

39 

40 

40 

40

40 

41 

42 

43 

43

43 

43 

43 

42 

42

42 

41 

41 

40 

41

42 

41 

40 

40 

39

39 

39 

39

mm

33 

37 

39 

40 

40

40 

40 

41 

42 

43

43 

43 

41 

41 

42

40 

41 

40 

40 

40

41 

39 

39 

39 

39

39 

37 

37

March

max

40 

40 

38 

37 

36

38 

38 

37 

36 

37

39 

39 

42 

42 

42

41 

42 

44 

44 

45

45 

42 

44 

44 

44

43 

44 

45 

45 

43 

45

min

39 

38 

36 

36 

35

36 

36 

36 

36 

36

37 

39 

39 

40 

40

40 

40 

40 

42 

42

42 

40 

40 

41 

42

43 

42 

42 

43 

42 

42

April

max

46 

48 

48 

48 

48

49 

48 

48 

48 

48

50 

51 

51 

51 

51

51 

51 

50 

48 

47

48 

48 

51 

52 

52

52 

50 

48 

46 

46

m
COWLITZ RIVER BASIN 

CISPUS RIVER NEAR HANDLE, WASH

LOCATION.--Temperature recorder at gaging station, 500 feet upstream from bridge to 

North Fork and 8 miles southeast of Randle, Lewis County 

DRAINAGE AREA . 323 square miles.

RECORDS AVAILABLE. Water temperatures: May 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 59°F Aug. 2-5, 9, 14-16, 20, 21, 

EXTREMES, May 1950 to September 1951.--Water temperatures: Maximum, 59°F Aug. 2-5, 

REMARKS. Records of discharge for water year October 1950 to September 1951 given 

for January to April 1951.

Temperature (°F) of water, water year October 1950 t

Day

2

1 *?

18

jq

20

23

26

9ft

29

30

Average - -

October

max

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

45

45 

44 

44 

44 

44 

44

min

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

45

44 

44 

44 

44 

44 

43

November

max

43 

43 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

42

min

43 

43 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

40

December

max

40

40 

40

min

40

40 

40

January

max min

February

max min

March

max mm

Apr

max 

a Recorder stopped; range in temperature only from Oct. 1 to Oct. 24; maximum 48°, minimum 45° du

Nov. 3 to Nov. 21; maximum 44°, minimum 40° during this period.
1 COWLITZ RIVER BASIN Continued 

RAINY CREEK NEAR KOSMOS , WASH.

LOCATION. Temperature recorder at gaging station at county bridge, 2 miles northeast 

DRAINAGE AREA. 17.5 square miles.

RECORDS AVAILABLE. --Water temperatures: August 1950 to September 1951. 

EXTREMES, 1950-51. Water temperatures: Maximum, 65°F July 13, 16, 17, 18, 1951; min

EXTREMES, 1950-51 . Water temperatures: Maximum, 65 °F July 13, 16, 17, 18, 1951; min

REMARKS. --Records of discharge for water year October 1950 to September 1951 given in 

Temperature (°F) of water, August 1950 to Septemb

Day

Q

1 0

1Q

25

27

Average --------

October

max mm

November

max min

December

max min

January

max min

February

max mm

March

max min

April

max m
COWLITZ RIVER BASIN--Continued 

RAINY CREEK NEAR KOSMOS, WASH. Continu

Temperature (°F) of water, August 1950 to September 195

Day

3

Q

12

1 ft

20

21

23

27

on

31

Average .....

October

max

49 

47 

48 

50 

50

49 

51 

52 

51 

50

50 

51 

53 

53 

51

49 

50 

50 

50 

50 

50 

48 

48 

48 

49

49 

47 

47 

47 

47 

47

49

min

46 

46 

47 

48 

49

48 

49 

50 

49 

50

48 

49 

51 

51 

49

48 

48 

49 

50 

50

47 

46 

48 

47 

48

47 

47 

47 

47 

47 

46

48

November

max

47 

47 

49 

49 

49

47 

47 

47 

45 

44

44 

44 

44 

43 

43

43 

43 

43 

43 

44

44 

45 

45 

45 

46

46 

46 

45 

45 

45

45

min

46 

46 

47 

47 

47

47 

47 

45 

43 

43

44 

44 

42 

43 

43

43 

43 

43 

41 

43

44 

44 

44 

45 

45

46 

45 

45 

45 

44

44

December

max

44 

43 

45 

45 

45

45 

45 

45 

46 

46

47 

46 

45 

45 

46

46 

46 

46 

47 

47

47 

47 

47 

47 

47

47 

45 

45 

45 

44 

44

46

min

43 

43 

43

45 

45

45 

45 

44 

45 

45

46 

45 

43 

44 

45

46 

46 

46 

46 

46

46 

47 

47 

47 

47

45 

45 

45 

45 

45 

44

45

January

max

44 

44 

44 

44 

44

43 

42 

43 

43 

44

44 

44 

44 

44 

43

41 

41 

41 

41 

41

41 

41 

41 

41 

42

41 

41 

39 

37 

37 

37

42

min

44 

44 

43 

43 

43 

42 

42 

42 

42 

43

44 

44 

44 

43 

41

41 

41 

41 

41 

41

41 

40 

41 

41 

41

41 

39 

36 

36 

37 

37

41

February

max

38 

40 

40 

41 

41

40 

41 

41 

42 

43

43 

43 

43 

44 

44

43 

42 

43 

42 

44

44 

42 

42 

42 

42

42 

41 

42

42

min

37 

38 

40 

40 

40

40 

40 

41 

42 

42

43 

42 

41 

42 

43

42 

42 

42 

42 

42

42 

40 

40 

41 

41

40 

39 

39

41

March

max

42 

41 

41 

38 

40

40 

41 

41 

40 

41

41 

41 

44 

43 

43

43 

44 

45 

47 

47

46 

43 

47 

47 

46

45 

46 

46 

46 

45 

48

43

mm

40 

40 

36 

37 

37

38 

39 

39 

39 

39 

40 

41 

41 

41 

41

41 

41 

41 

42 

43

43 

41 

42 

43 

44

44 

42 

42 

44 

42 

43

41

April

max

48 

49 

50 

48 

48

49 

49 

48 

48 

49

52 

51 

50 

49 

49

50 

49 

46 

44 

47

48 

48 

50 

50 

50

50 

48 

46 

46 

46

48

m

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

a Recorder stopped; range in temperature only from July 22 to Aug. 3; maximum 65°F, minimum 59°F, 
COWLITZ RIVER BASIN--Continue

WEST FORK TILTON RIVER NEAR MORTON

LOCATION. Temperature recorder, three quarters of a mile above mouth and 4 miles 

DRAINAGE'AREA. 16.4 square miles.

RECORDS AVAILABLE.--Water temperatures: August 1950 to September 1951. 

EXTREMES, 1950-51. Water temperatures: Maximum, 63°FAug. 21, 1951.

EXTREMES, August 1950 to September 1951.--Water temperatures: Maximum, 63 °F Aug. 

REMARKS. No temperature record from Dec. 21, 1950 to May 1, 1951. Records of di

Water-Supply Papers 1184 and 1218.

Temperature (°F) of water August 1950 to Sep

Day

0

13

jq

22

2 5

27

30

Average --------

October

max min

November

max min

December

max mm

January

max min

February

max mm

March

max min

A

ma
COWLITZ RIVER BASIN--Continued

WEST FORK TILTON RIVER NEAR MORTON, WAS

Temperature (°F) of water August 1950 to September 

Day

Q

7 .... . _ _. __

18 _ ._

22

25

27

October

max

47 

46 

47 

48 

48 

48 

48 

49 

49

48 

49 

49 

48

46 

47 

47 

47 

47

47 

46 

46 

46 

47

46 

45 

45 

45 

45 

45

47

mm

45 

44 

46

47 

48

47 

47 

48 

47

47 

48 

48

1 46

46 

46 

47 

47 

47

45 

45 

45 

45 

46

45 

45 

45 

45 

45 

44

46

November

max

45 

45 

46 

46 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

min

44 

45 

45 

46 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

--

December

max

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a)

min

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a)

--

January

max min

February

max mm

March

max min

A

max 

a Recorder stopped; range in temperature only from Nov. 5 to Dec. 21; maximum 45°, minimum 37° 
COWLITZ RIVER BASIN--Continued

COWLITZ RIVER NEAR MAYFIELD, WAS

LOCATION. Temperature recorder at gaging station 1 mile upstream from Mill Creek, 

west of Mayfield, Lewis County. 

DRAINAGE AREA.--1,400 square miles.

RECORDS AVAILABLE.--Water temperatures: October 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 66°F July 28, 31, Aug. 1, 21, 19

REMARKS.--Records of discharge for water year October 1950 to September 1951 given 

Temperature (°F) of water, water year October 1950 to 

Day

0

21

23

Q/\

Q1

"

Average --------

October

max

51 

49 

48 

50 

51 

51 

51 

51 

51 

50

49 

50 

52 

52 

52

51 

49 

49 

49 

49

49

49 

47 

47 

47

47 

46 

46 

45 

45 

45

49

min

49 

48 

48 

49 

50

50 

50 

51 

50 

50

48 

49 

50 

52 

51

49 

49 

49 

49 

49

49 

47 

47 

47 

47 

46 

46 

45 

45 

45 

45

48

November

max

45 

45 

47 

47 

47

46 

45 

45 

45 

43

41 

41 

41 

41 

41

41 

42 

43 

43 

43

43

--

min

45 

45 

45 

47 

46

45 

45 

45 

43 

41

41 

41 

41 

41

41

41 

41 

42 

43 

43

43

--

December

max min

January

max

40

40 

40 

41 

41 

41

41 

40 

40 

40 

40

40 

40 

40 

40 

40

40 

40 

39 

37 

35 

35

"

mm

40

40 

40 

41 

41 

41

40 

40 

40 

40 

40

40 

40 

40 

40 

40

40 

39 

37 

35 

35 

35

"

February

max

35 

36 

37 

39 

39 

39 

40 

40 

42 

42

42 

42 

42 

42 

42

42 

42 

42 

42 

42

42 

42 

42

41 

41

41 

41 

40

41

mm

35 

35 

36 

37 

39

39 

39 

40 

42 

42

42 

42 

42 

42 

42

42 

42 

42 

42 

42

42 

42 

41 

41 

41

41 

40 

39

40

March

max

39 

40 

40 

39 

38

38 

38 

38 

38 

38

38 

38 

41 

42 

42

41 

41 

43 

44 

45

45 

44 

43 

45 

45

44 

45 

45 

45 

45 

46

42

mm

39 

40 

39 

38 

37

37 

38 

38 

38 

38 

38 

38 

38 

41 

41

41 

40 

41 

42 

43

44 

42 

41 

43 

43

44 

43 

44 

45 

44 

44

41

Ap

max

47 

48 

49 

47 

47

47 

47 

47 

47 

47

48 

49 

48 

48 

47

48 

48 

47 

45 

45

46 

47 

49 

49 

50

50 

50 

47 

47

47

48
CDWLITZ RIVER BASIN Continued 

TOUTLE RIVER NEAR SILVER LAKE, W

LOCATION. Temperature recorder at gaging station at highway bridge half a mile do

miles northeast of Silver Lake, Cowlitz County. 

DRAINAGE AREA. 474 square miles.

RECORDS AVAILABLE.--Water temperatures: October 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 71°F July 16, 23, 31, 1951; mini

REMARKS.--Records of discharge for water year October 1950 to September 1951 given 

Temperature (°F) of water, water year October 1950 t

Day

13

19

22

90

25

29

Average ---- -

October

max

45

min

44

November

max

45 

45 

47 

47 

47

46 

46 

45 

44 

42

42 

43 

43 

41 

41 

43 

43 

43 

43 

43

43 

44 

44 

44 

45

45 

45 

45 

45 

44

44

min

44 

45 

45 

46 

46

45 

45 

44 

42 

41

42 

42 

41 

41 

41 

41 

43 

43 

42 

42

43 

43 

44 

44 

44

45 

45 

45 

44 

44

43

December

max

44 

43 

43 

43 

43

44 

44 

44 

44 

44

45 

45 

44 

44 

44 

44 

44 

44 

45 

45

45 

45 

45 

45 

45

45 

44 

44 

45 

45 

43

44

min

42 

42 

43 

43 

43

43 

44 

44 

44 

44

44 

44 

43 

43 

44 

44 

44 

44 

43 

45

44 

44 

45 

45 

45 

44 

44 

44 

44 

43 

43

44

January

max

43 

43 

43 

42 

42

42 

40 

40 

. 40 

40

40 

40 

40 

40 

40 

39 

40 

40 

39 

39

39 

39 

40 

41 

41

41 

41 

39 

35 

35 

35

40

min

43 

43 

43 

42 

42

40 

39 

40 

40 

40

40 

40 

40 

40 

39 

39 

39 

39 

39 

39

39 

39 

39 

40 

41 

41 

39 

35 

34 

34 

35

39

February

max

37 

38 

38 

39 

39

39 

41 

41 

41 

41 

41 

41 

41 

41 

41 

41 

41 

41 

41 

42

42 

41 

41 

40 

40

,41 

41 

41

40

min

35 

37 

38 

38 

39

33 

39 

41 

41 

41 

41 

41 

40 

40 

41 

40 

41 

40 

40 

40

41 

40 

39 

39 

39

39 

39 

39

40

March

max

41 

41 

40 

39 

37

39 

39 

38 

37 

38

39 

39 

41 

42 

42 

42 

43 

45 

45 

46

46 

43 

45 

46 

46

46 

48 

48 

48 

47 

47

43

min

40 

39 

39 

37 

37

37 

37 

37 

37 

37

38 

39 

39 

41 

40 

40 

40 

41 

42 

43

43 

42 

41 

43 

44

45 

44 

45 

47 

44 

44

41

A

max

50 

52 

53 

51 

50

52 

52 

51 

53

--
COWLITZ RIVER BASIN Continued 

COWLITZ RIVER AT CASTLE ROCK, WASH.

LOCATION. Temperature recorder at highway bridge in Castle Rock, Cowlitz County, 2i m

upstream from mouth. 

DRAINAGE AREA. 2,238 square miles.

RECORDS AVAILABLE. Water temperatures: August 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 72°F Aug. 21, 1951; minimum, freezin

EXTREMES, August 1950 to September 1951. Water temperatures: Maximum, 72°F Aug. 21, 

REMARKS.--Records of discharge for water years 1949-50 and 1950-51 given in Water-Supp

Temperature (°F) of water, August 1950 to Septembe

Day

9

20

22

2 5

Average -

October

max min

November

max min

December

max min

January

max min

February

max min

March

max min

April

max mi
COWLITZ RIVER BASIN Continued 

COWLITZ RIVER AT CASTLE ROCK, WASH.--Con

Temperature (°F) of water, August 1950 to September 195

Day

2

o

12

1 ^

1 ft

23

97

31

Average - --

October

max

55 

52 

51 

52 

52

52 

52 

52 

52 

51

51 

49 

51 

52 

52

51 

50 

49 

50 

50

50 

49 

49 

48 

48

48 

47 

46 

45 

45 

45

50

min

51 

50 

50 

51 

51

52 

52 

52 

50 

50

49 

49 

49 

51 

51

50 

49 

49 

49 

50

49 

48 

48 

48 

48 

47 

46 

45 

45 

45 

45

49

November

max

45

45 

47 

47 

47

46 

45 

45 

44 

42

41 

42 

42 

41 

40 

41 

42 

42 

41 

42

43 

43 

43 

43 

43 

44 

44 

44 

43 

43

43

mm

45 

45

45 

47 

46

45 

45 

44 

42 

41

41 

41 

41 

40 

40

40 

41 

41 

40 

40

42 

43 

43 

43 

43 

43 

44 

43 

43 

43

43

December

max

43 

41 

41 

42 

42

43 

43 

43 

43 

43

43 

43 

43 

42 

42

43 

43 

43 

43

43

43 

45 

45 

45 

44 

44 

43 

43 

43 

43 

43

43

min

41 

41 

41 

41 

42

42 

43 

43 

43 

43

43 

43 

42 

42 

42

42 

43 

43 

43 

43

43 

43

45 

44 

44

43 

43 

43 

43 

43 

41

43

January

max

41 

42 

42 

41 

41

41 

40 

39 

39

41

41 

41 

41 

41 

41

41 

40 

40 

39 

39

40 

40 

40 

42 

42 

42 

40 

38 

34 

33 

34

40

min

41 

41 

41 

41 

41

40 

39 

39 

39 

39

41 

41 

41 

41 

41

39 

39 

39 

39 

39

39 

40 

40 

40 

42

40 

38 

34 

32 

32 

33

39

February

max

34 

37 

38 

39 

40

40 

41 

41 

42 

42

41 

41 

41 

40 

41

40 

41 

40 

40 

41

42 

42 

41 

40 

40

40 

40 

40

40

min

34 

34 

37 

38 

39

40 

40 

41 

41

41

41 

41 

40 

40 

40

41 

40 

40 

40 

40

41 

41 

40 

40 

39

39 

39 

38

39

March

max

40 

39 

39 

37 

35

35 

35 

36 

36 

36

37 

38 

39 

40 

42 

40 

40 

41 

42 

43

44 

44 

42 

44 

45

44 

45 

45 

46 

46 

45

41

min

39 

39 

37 

35 

33

33 

35 

35 

36 

36

36 

37 

38 

39 

40

39 

39 

40 

41 

42

43 

42 

41 

42 

44

44 

43 

45 

45 

45 

44

40

April

max

47 

48 

49 

50 

48

48 

48 

48 

48 

48

49 

51 

51 

50 

50 

50 

50 

49 

48 

46

48 

48 

50 

51 

52

52 

52 

50 

49

49

mi

4

4

4

4

4

4

4

4

4

4

4

4

5

5

4

4

4

4

4

4

4

4

4

4

5

5

5

4

4

4

4
COWLITZ RIVER BASIN--Continued

COWEMAN RIVER NEAR KELSO, WASH.

LOCATION. Temperature recorder, 3 miles downstream from Goble Creek, 3.8 miles eout

upstream from mouth. 

DRAINAGE AREA.--119 square miles.

RECORDS AVAILABLE. Water temperatures: July 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 80°F July 16, 1951; minimum, 34°F 

EXTREMES, July 1950 to September 1951.--Water temperatures: Maximum, 80°F July 16, 

REMARKS. Records of diecharge for water years 1949-50 and 1950-51 given in Water-Su

Temperature (°F) of water, July 1950 to Septembe

Day

O

1 ft

19

99

o«>

25

30

Average 

October

max min

November

max mm

December

max min

January

max mm

February

max min

March

max min

Apri

max 
COWLITZ RIVER BASIN--Continued

COWEMAN RIVER NEAR KELSO, WASH.--Contin

Temperature (°F) of water, July 1950 to September 1951

Day

2

3

jq

22

25

27

on

October

max

49 

47 

47 

52 

52

51 

54 

53 

51 

51

51 

53 

54 

54 

51

48 

48 

50 

51 

51

50 

49 

49 

47 

49

49

47 

47

50

min

45 

44 

45 

47 

51 

49 

51 

51 

47 

49

48 

49 

51 

51 

48

46 

47 

48 

50 

50

48 

47 

47 

46

47

47

46 

45

48

November

max

47 

48 

51 

51 

50 

48 

48 

47 

45 

41

42 

43 

42 

40

49

49 

49 

47 

47 

45

--

min

46 

47 

48 

50 

48

47 

47 

45 

42 

39

41 

42 

40 

40

48

48 

47 

46 

45 

45

--

December

max

45 

44 

46 

46 

46

46 

46 

46 

47

47

49 

49 

47 

45 

47

48 

48 

48 

49 

49

49

48 

48

47 

46 

45 

47 

47 

45

47

min

44 

44 

44 

46 

46

46 

46 

45 

45 

47

48 

47 

44 

44 

45

47 

48 

47 

47 

48

49

47 

47

46 

45 

45 

45 

45 

44

46

January

max

44

46 

46

46 

44 

44 

44 

45

45 

45 

45 

45

42 

42

44 

46 

46

45 

44 

41 

37 

35 

36

--

min

44

46 

46 

44 

43 

44 

44 

44

45 

45 

45 

45

42 

42

44 

44 

45

44 

41 

37 

35 

35 

34

--

February

max

39 

41 

41 

42 

42

43 

45 

45 

46 

46

46 

46 

45 

44 

44

44 

43 

43 

43 

44

44 

43 

42 

41 

41

41 

41 

40

43

mm

36 

39 

41 

41 

42 

41 

43 

45 

45 

46

46 

45 

43 

43

44

42 

43 

42 

43 

43

43 

41 

40 

41 

40

39 

38 

38

42

March

max

41 

41 

39 

39 

37

39 

37 

37 

38 

37

39 

39 

41 

42 

42

42 

43 

43 

44 

45

45 

43 

44 

44 

44

44 

45 

45 

45 

45 

45

42

min

39 

39 

38 

37 

35

35 

35 

35 

35 

36

37 

39 

39 

41 

41

41 

41 

40 

41 

42

43 

41 

40 

41 

43

43 

42 

43 

45 

42 

42

40

April

max

47 

48 

49 

49 

47

49 

49 

49 

50 

50

53 

55 

55 

55 

55

55 

53 

52 

48 

51

52 

50 

54 

55 

57

56 

53 

50 

50 

50

52

mi

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4

4
ABERNETHY CREEK BASIN 

ABERNETHY CREEK NEAR LONGVIEW, W

LOCATION. Temperature recorder, at gaging station 1 mile upstream from mouth and 

DRAINAGE AREA. 20.3 square miles.

RECORDS AVAILABLE.--Water temperatures: June 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum 67 °F Aug. 19, 20, 1951; minimum, 

EXTREMES, June 1950 to September 1951.--Water temperatures: Maximum, 68°F Aug. 1

REMARKS.--Records of discharge for water year October 1950 to September 1951 give

Temperature (°F) of water, water year October 1950 

Day

2

3

12

21

29

Average --------

October

max

50 

49 

50 

52 

52 

52 

54 

54 

53 

52

52 

51 

53 

53 

50

48 

50 

51 

51 

51

50 

48 

49 

49 

49

49 

48 

48 

48 

48 

47

50

mm

46 

46 

48 

50 

52

51 

52 

53 

50 

51

51 

50 

51 

50 

47

47 

48 

50 

51 

49

48 

47 

47 

47 

48 

48 

48 

48 

48 

47 

47

49

November

max

48' 

48 

49 

49 

49

48 

48 

48 

46 

45

45 

45 

44 

43 

43

43 

45 

45 

45 

45

46 

46 

46 

47 

47

47 

47 

47 

46 

45

46

min

47 

48 

48 

49 

48

48 

48 

46 

44 

43

44 

44 

43 

43 

42 

42 

43 

45 

44 

44

45 

46 

46 

46 

47

47 

47 

47 

45 

45

45

December

max

45 

45 

46 

46 

46

46 

46 

46 

47 

47

47 

47 

46 

45 

46

47 

47 

47 

47 

47

47

"

mm

45 

45 

45 

46 

46

46 

46 

46 

46 

47

47 

46 

45 

45 

45

46 

47 

47 

47 

47

47

"

January

max min

February

max

--"

46 

46 

44 

44 

44

43 

43 

43 

42 

43

43 

43 

43 

42 

42

43 

43 

42

mm

--

46 

44 

43 

43 

43

42 

43 

41 

42 

42

43 

42 

40 

41 

40

41 

40 

39

March

max

42 

42 

40 

38 

38

39 

39

--

min

41 

39 

38 

38 

37

37 

36

--

ma
CLATSKANIE RIVER BASIN 

CLATSKANIE RIVER NEAR CLATSKANIE, O

LOCATION. Temperature recorder at gaging station, 2 miles downstream from Carcus C

Columbia County.

DRAINAGE AREA.--52.0 square miles.

RECORDS AVAILABLE.--Water temperatures: May 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 70°F June 29, July 16; minimum, 3

EXTREMES, May 1950 to September 1951.--Water temperatures: Maximum, 75°F July 24, 

Mar. 6-11, 1951. 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 1

Temperature (°F) of water, water year October 1950 to 

Day

3

22

31 

Average --- --

October

max

51 

50 

50 

51 

51

51 

53 

53 

53 

53

53 

53 

53 

53 

52

50 

50 

51 

52 

52

52 

51 

50 

49 

50

50 

49 

49 

49 

49 

48

51

min

48 

48 

48 

49 

51

51 

51 

53 

51 

51

52 

52 

53 

52 

50

49 

49 

50 

51 

52

51 

50 

49 

48 

48 

49 

48 

49 

49 

48 

47

50

November

max

48 

49 

50 

51 

51

50 

50 

50 

49 

46

45 

45 

45 

44 

45

45 

45 

45 

43 

43

44 

45 

45 

45 

46

47 

47 

47 

46 

45

47

min

48 

48 

49 

50 

50

50 

50 

49 

46 

45

45 

45 

44 

43 

43

45 

45 

43 

42 

42

43 

44 

44 

44 

45

46 

47 

46 

45 

44

46

December

max

44 

44 

44 

45 

45

45 

45 

45 

45 

45

45 

45 

44 

44 

44

44 

44 

44 

45 

45

45 

45 

46 

46 

46

47 

46 

46 

46 

46 

46

45

min

43 

43 

43 

44 

45

45 

44 

44 

44 

45

45 

44 

44 

44 

44

44 

44 

44 

44 

45

45 

45 

45 

46 

46

46 

46 

46 

46 

46 

45

45

January

max

45 

45 

45 

45 

44

44 

42 

43 

43 

43

43 

43 

43 

43 

44

44 

44 

44 

44 

44

43 

43 

43 

44 

45

45 

45 

45 

44 

43 

39

44

min

45 

45 

45 

44 

42

42 

42 

42 

42 

42

42 

43 

43 

42 

43

43 

43 

44 

44 

43

43 

43 

43 

43 

43

45 

45 

44 

43 

39 

38

43

February

max

38 

40 

42 

43 

42

42 

45 

45 

47 

47

46 

46 

45 

45 

45 

44 

43 

43 

43 

43

43 

44 

44 

43 

43

42 

41 

41

43

min

38 

38 

40 

42 

42

42 

42 

44 

45 

46

46 

45 

43 

43 

44

43 

43 

43 

43 

43

43 

44 

43 

43 

42

41 

41 

40

43

March

max

41 

41 

41 

40 

40

39 

38 

38 

38 

38

39 

40 

41 

42 

42

--

min

40 

41 

40 

40 

39

38 

38 

38 

38 

38

38 

39 

40 

41 

41

Apr

max

54 

51 

50 

53 

50

-.
ELOKOMIN RIVER BASIN

ELOKOMIN RIVER NEAR CATHLAMET, WAS

LOCATION. Temperature recorder at gaging station 2 miles northeast of Cathlamet, Wah

DRAINAGE AREA.--66 square miles.

RECORDS AVAILABLE. Water temperatures: June 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 73°F June 29, 1951; minimum, 36°F J

EXTREMES, June 1950 to September 1951.--Water temperatures: Maximum, 73°F June 29, 1

REMARKS. Records of discharge for water year October 1950 to September 1951 given in 

Temperature (°F) of water, water year October 1950 to S

Day

6 

g

13

1 ft

24

25

31 ...... ....

Average- - -- -

October

max

50 

48 

49 

51 

52

51 

52 

53 

51 

51

51 

51 

52 

52 

50

48 

49 

50 

51 

51

-

45 

45 

45 

45 

45 

45

49

mm

47 

46 

47 

49 

51

50 

51 

51 

50 

50

50 

50 

51 

50 

47

47 

48 

49 

50 

49

45 

45 

45 

45 

45 

45

48

November

max

45 

45 

48 

48 

48

48 

48 

47 

46 

43

43 

43 

43 

41 

41

42 

42 

42 

42 

43

44 

44 

44 

45 

46

47 

47 

47 

47 

45

4B

min

45 

45 

45 

48 

47

48 

47 

46 

43 

42

42 

43 

41 

41 

41

41 

42 

42 

42 

42

43 

44 

44 

44 

45

47 

47 

47 

45 

45

44

December

max

45 

44 

45 

45 

45

45 

45 

45 

46 

46

46 

46 

46 

45 

46

46 

46 

46 

46

47

47 

47 

47 

47 

47

47 

46 

46 

47 

47 

46

4fi

min

44 

44 

44 

45 

45

45 

45 

45 

45 

46

46 

46 

45 

45

45

46 

46 

46 

46 

46

47 

47 

47 

47 

47

46 

46 

46 

46 

46 

45

4fi

January

max

45 

45 

44 

44 

44

44 

43 

43 

43 

43

43 

43 

43 

43 

43

42 

42 

42 

42 

42

42 

42 

43 

43 

43

43 

43 

40 

37 

37 

37

49.

min

44 

44 

44 

44 

44

43 

42 

42 

43 

43

43 

43 

43 

43 

42

41 

42 

42 

41 

42

42 

41 

42 

42 

43

43 

40 

37 

36 

36 

37

42

February

max

38 

40

--

min

37 

38

--

March

max

--

39 

39

40 

40 

42

min

38 

38

39 

40 

40

April

max

--

52 

52

52 

51 

48 

47 

50

49 

48 

52 

53 

54

54 

51 

49 

49 

48

a Recorder stopped; range in temperature only from Aug. 29 to Sept. 23; maximum 66°, minimum 54° d
BIG CREEK BASIN 

BIG CREEK NEAR KNAPPA, OREG.

LOCATION. Temperature recorder at gaging station, 0.3 mile downstream from fish hatch

DRAINAGE AREA. 31.9 square miles. 

RECORDS AVAILABLE.--Water temperatures: May 1950 to September 1951.

EXTREMES, 1950-51.--Water temperatures: Maximum, 62°F Aug. 20, 21; minimum, 37°F Mar. 

EXTREMES, May 1950 to September 1951. Water temperatures: Maximum 62°F Aug. 20, 21, 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 1218

Temperature (°F) of water, water year October 1950 to Sep

Day

2

3

g

1 1

18

on

09

23

OK

nrj

no

OQ

on

01

Average - -

October

max

48 

47 

48 

48 

48 

49 

50 

50 

50 

50

50 

50 

50 

50 

50

49 

48 

49 

50 

50

50 

49 

48 

48 

48

48 

48 

48 

48 

48 

47

49

mm

47 

46 

46 

48 

48 

48 

48 

50 

49 

49

50 

50 

50 

50 

49

48 

48 

48 

49 

50

49 

47 

47 

47 

47 

47 

47 

48 

48 

47 

47

48

November

max

47 

48 

49 

49 

49

49 

49 

49 

48 

46

45 

45 

45 

44 

43 

44

--

mm

47 

47 

48 

49 

49 

49 

48 

48 

46 

45

45 

45 

44 

43 

43 

43

--

December

max

45 

45 

45 

45 

45

45 

45 

45 

43 

44

44 

44 

44 

44 

45

45 

45 

46 

46 

46

46 

45 

45 

45 

46 

45

45

mm

45 

45 

44 

44 

45

45 

45 

43 

43 

43

44 

44 

44 

44 

44

45 

45 

45 

46 

46

45 

45 

45 

45 

45 

45

45

January

max

45 

45 

45 

45 

45

44 

44 

43 

43 

44

44 

45 

45 

45 

45

44 

44 

44 

44 

43

43 

43 

43 

44 

44

44 

43 

41 

38 

38 

38

43

mm

45 

45 

45 

45 

44

44 

43 

43 

43 

43

44 

44 

45 

45 

44

43 

43 

44 

43 

43

43 

43 

43 

43 

44

43 

41 

38 

38 

38 

38

43

February

max

39 

40 

41 

42 

42

42 

43 

44 

45 

45

45 

45 

44 

44 

44

43 

43 

43 

42 

42

43 

42 

42 

42 

42

41 

41 

41

43

min

38 

39 

40 

41 

42

41 

42 

43 

44 

45

45 

44 

43 

43 

43

42 

42 

42 

42 

42

42 

42 

41 

41 

40

40 

40 

40

42

March

max

40 

40 

40 

40 

38

39 

38 

38 

38 

39

39 

39 

41 

41 

41

41 

41 

42 

43 

43

42 

41 

42 

43 

43

43 

43 

44 

44 

42 

43

41

mm

40 

39 

39 

38 

37

37 

37 

38 

38 

38

39 

39 

39 

41 

40

40 

41 

41 

41 

42

40 

40 

40 

41 

42

43 

42 

42 

42 

42 

41

40

April

max

44 

45 

46 

45 

45

46 

46 

45 

46 

46 

47 

47 

47 

47 

47

47 

46 

46 

45 

46

46 

45 

47 

47 

48

48 

47 

45 

45 

45

46

mm

4

42 

43 

44 

42

43 

44 

42 

43 

43

44 

44 

44 

44 

43

44 

44 

4

4

4

4

4

4

4

4

4

4

4

4

4

4
GRAYS RIVER BASIN 

WEST BRANCH GRAYS RIVER NEAR GRAYS RIV

LOCATION. Temperature recorder at gaging station 1 mile upstream from mouth and 

DRAINAGE AREA. 16.3 square miles.

RECORDS AVAILABLE.--Water temperatures: June 1950 to September 1951.

EXTREMES, 1950-51. Water temperatures: Maximum, 65°F June 29, 1951; minimum, 38

EXTREMES, 1950-51 Water temperatures: Maximum, 65°F July 24, 25, 1950, June 29, 

REMARKS. Records of discharge for water year October 1950 to September 1951 give

Temperature (°F) of water, October 1950 to 

Day

4

Q

1 ft

25

Oft

October

max

52 

51 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a)

13

min

50 

49 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

(a) 

(a)

(a) 

(a) 

(a) 

 (a) 

(a) 

(a)

November

max

(a) 

48 

49 

49 

49

49 

49 

48 

47 

46

46 

46 

45 

45 

44

44 

44 

44 

44 

46

46 

47 

47 

47 

48

48 

48 

48 

48 

47

47

min

(a) 

48 

48 

49 

49

49 

49 

47 

46 

45

46 

45 

45 

44 

44

44 

44 

44 

44 

44

46 

46 

47 

47 

47

48 

48 

48 

47 

46

4R

December

max

46 

46 

46 

46 

46

46 

46 

46 

47 

47

47 

47 

47 

47 

47

47 

47 

47 

47 

47

47

min

46 

46 

46 

46 

46

46 

46 

46 

46 

47

47 

47 

47 

47 

47

47 

47 

47 

47 

47

47

January

max

45 

45 

42 

40 

40 

40

min

45 

42 

41 

40 

40 

40

February

max

41 

42 

43 

44 

44

44 

45 

46

45 

45 

45 

45

45 

45 

45 

44 

44

44 

44 

44 

44 

44

43 

43 

42

44

mm

40 

41 

42 

43 

44

44 

44 

45

45 

45 

45 

45

45 

45 

44 

44 

44

44 

44 

44 

44 

43

43 

42 

42

44

March

max

42 

42 

42 

41 

40

40 

39 

38 

39 

40

40 

40 

40 

42 

43

43 

44 

44 

45 

45

45 

45 

45 

45 

45

45 

45 

45 

45 

45 

45

43

min

42 

41 

41 

40 

40

39 

38 

38 

39 

40

40 

40 

40 

40 

42

43 

43 

44 

44 

45

45 

45 

45 

45 

45

45 

45 

45 

45 

45 

45

49.

A

max

4

4

4

4

4

4

4

4

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

5

a Recorder stopped; range in temperature only from Oct. 3 to Nov. 1; maximum 53°, minimum 48° 

b After July 10 the temperature bulb was covered with gravel, and results are considered too inacc
YOUNGS RIVER BASIN 

NORTH FORK KLASKANINE RIVER NEAR OL

LOCATION. Temperature recorder at gaging station, half a mile downstream from Ear

North Fork, and 4 miles southeast of Olney, Clatsop County. 

DRAINAGE AREA. 14.0 square miles.

RECORDS AVAILABLE. Water temperatures: May 1950 to September 1951.

EXTREMES, 1950-51 Water temperatures: Maximum, 64°F June 29; minimum, 35°F Jan. 

EXTREMES, May 1950 to September 1951. Water temperatures: Maximum, 64°F Aug. 18, 

Mar. 9, 1951. 

REMARKS. Records of discharge for water year 1950-51 given in Water-Supply Paper 

Temperature (°F) of water, water year October 1950 t

Day

Q

o

I 0

22

29

Average --- -

October

max

48 

47 

49 

51 

51 

51 

53 

53 

52 

52

52 

51 

53 

53 

51

49 

49 

51 

51 

51

51 

49 

48 

48 

48 

49 

48 

48 

48 

48 

47

50

min

45 

45 

46 

49 

51 

50 

50 

52 

49 

50

50 

50 

51 

51 

49 

48 

48 

49 

51 

51

49 

47 

48 

47 

48 

48 

48 

48 

48 

47 

47

49

November

max

48 

49 

50 

50 

50 

49 

49 

49 

47 

45

45 

45 

44 

42 

43

44 

45 

45 

45 

46

47 

48 

48 

48 

49 

49 

49 

47 

46 

44

47

mm

47 

48 

49 

50 

49 

49 

49 

47 

45 

44

44 

44 

42 

41 

41

43 

44 

45 

44 

44

46 

47 

46 

48 

48

49 

47 

46 

44 

44

46

December

max

44 

44 

45 

47 

47 

46 

46 

46 

47 

47

47 

47 

45 

45 

46

47 

47 

47 

48 

48

48 

48 

48 

48 

48

47 

47 

47 

47 

47 

45

47

mm

44 

44 

44 

45 

46 

46 

46 

46 

46 

47

47 

45 

44 

45 

45

46 

47 

47 

47 

48

48 

48 

48 

48 

47 

46 

47 

47 

46 

45 

45

46

January

max

45 

45 

45 

45 

45 

43 

43 

43 

43 

43

43 

44 

44 

44 

44

43 

43 

43 

42 

42

42 

43 

43 

45 

45

45 

43 

41 

37 

37 

37

43

min

45 

45 

45 

45 

43 

43 

43 

42 

42 

43

43 

43 

44 

44 

43

43 

43 

42 

42 

42

42 

42 

43 

43 

45

43 

41 

36 

35 

35 

35

42

February

max

39 

41 

41 

42 

42 

43 

45 

46 

47 

47

47 

47 

45 

46 

46

44 

44 

44 

44 

45

44 

43 

43 

42 

42

41- 

41 

41

44

mm

36 

39 

40 

41 

42 

42 

43 

45 

46 

47

47 

45 

45 

45 

44

43 

44 

43 

43 

44

43 

42 

41 

42 

40

39 

39 

39

42

March

max

41 

40 

39 

39 

38 

39 

38 

38 

38 

39

39 

39 

42 

42 

42

42 

43 

44 

45 

44

43 

42 

44 

4$ 

44

44 

45 

46 

46 

43 

44

43

min

39 

38 

39 

37 

37 

37 

36 

37 

35 

36

38 

39 

39 

41 

41

41 

42 

41 

42 

42

41 

41 

40 

41 

43

43 

42 

43 

43 

43 

42

40

Ap

max

46 

48 

49 

47 

47 

43 

48 

48 

48 

49

52 

51 

50 

51 

52

51 

50 

48 

46 

48

48 

47 

50 

50 

50

51 

49 

47 

46 

46

49
INDEX

Page 

277 

277

194 

202 

8

224-225 

228 

Animas River at Farmington, N. Mex. .. . 119-124

Abernethy Creek near Longview, Wash. .. 

Abernethy Creek basin..................

Agua Fria River below Lake Pleasant

Dam, Ariz. ...................

Alamo River near Calipatria, Calif. .....

Aluminum .............................

American River at Fair Oaks, Calif......

at Sacramento, Calif.

Ariel, Wash., Lewis River at,

B

Bartlett Dam, Ariz., Verde River below. 

Big Creek near Knappa, Oreg. .........

Big Creek basin.......................

Blacks Fork near Green River, Wyo. ...

Blanco, N. Mex., San Juan River near .. 

Blue River, Oreg., Lookout Creek near . 

Bluff, Utah, San Juan River near........

Boise River at Notus, Idaho ............

Boise River basin .....................

Boron................................

Boulder City, Nev., Lake Mead near....

Breitenbush River above Canyon Creek

near Detroit, Oreg. ...........

Bull Run, Oreg., Bull Run River at .....

Bull Run River at Bull Run, Oreg. ......

Burney Creek near Burney, Calif. ......

Cache Creek near Lower Lake, Calif.....

Calcium...............................

Cameo, Colo., Colorado River near......

Cameron, Ariz., Little Colorado River at 

Carbonate and bicarbonate ..............

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

Cathlamet, Wash., Elokomin River near.. 

Chemical quality .......................

Chloride ..............................

Cisco, Utah, Colorado River near........

Cisco, Utah, Dolores River near.

Cispus River near Handle, Wash..'.......

Clatskanie, Oreg., Clatskanie River near. 

Clatskanie River near Clatskanie, Oreg... 

Clatskanie River basin..................

Clear Lake at Lakeport, Calif. ..........

near Clear Lake Oaks, Calif. .......

Collection and examination of samples....

Color .................................

Colorado River at Kite, Utah ............

at Hot Sulphur Springs, Colo. .......

at Lees Ferry, Ariz. ..............

below Hoover Dam, Ariz. -Nev. .....

near Cameo, Colo. ................

near Cisco, Utah...................

near Glenwood Springs, Colo. .......

near Grand Canyon, Ariz. ..........

Colorado River basin ...................

Columbia River at Grand Coulee Dam,

Wash. ........................

at Maryhill Ferry near Rufus, Oreg. . 

Composition of surface waters...........

Cooperation ...........................

Corrosiveness .........................

Cottonwood Creek near Cottonwood, Calif. 

Coweman River near Kelso, Wash. ......

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

near Mayfield, Wash. ..............

Cowlitz River basin ....................

264

191-193

280

280

53-55

113-118

258-259

129-135

238-240

238-240

11

176-181

261

252-253 

252-253

226

229

9

29-31 

153

10

273-274

279

3

10-11

43-48

38-42

266

278

278

278

228

228

3-5

12

105-110

20-22

136-143

182-184

29-31

43-48

26-28

154-160

20-199

232-234

243-245

7-15

16-17

14

227

275-276

273-274

271

266-276

Page 

Dale, Oreg., Desolation Creek near.... 242

Dee, Oreg., Green Point Creek near... 251 

Delta, Calif., Sacramento River at .... 216

Deschutes River basin ................ 246

Desolation Creek near Dale, Oreg. .... 242

Detroit, Oreg., Breitenbush River near 261 

Detroit, Oreg., North Santiam River

near........................ 260

Dirty Devil River near Kite, Utah...... 102-104

Dirty Devil River basin ............... 102-104

Dissolved solids...................... 12

Diversions and Return Flows at and

below Imperial Dam .......... 198-199

Division of work ..................... 17

Dolores River at Gateway, Colo. ...... 35-37

near Cisco, Utah................. 38-42

Dolores River basin .................. 35-42

Duchesne River near Randlett, Utah.... 74-76

Eagle River below Gypsum, Colo. ..... 23-25

Eagle River basin .................... 23-25

East Fork Lewis River near Heisson,

Wash. ...................... 265

East Fork Russian River near Calpella,

Calif........................ 230

Elokomin River near Cathlamet, Wash.. 279 

Elokomin River basin................. 279

Escalante, Utah, Escalante River at

mouth near .................. 111-112

Escalante River at mouth near Escalante,

Utah........................ 111-112

Escalante River basin ................ 111-112

Expression of results................. 6-7

Fair Oaks, Calif., American River at.. 224-225 

Fall Creek, Oreg., Fall Creek near.... 256-257

Fall Creek below Winberry Creek near

Fall Creek, Oreg. ........... 256-257

Farmington, N. Mex., Animas River at 119-124 

Feather River at Nicolaus, Calif.... 222-223, 228

near Oroville, Calif. ............. 227

Fluoride ............................ 11

Fort Pierce Wash near St. George, Utah 175

Gateway, Colo., Dolores River at ..... 35-37

Gila River at Kelvin, Ariz. ........... 185-187

below GUlespie Dam, Ariz. ....... 195-197

Gila River basin ..................... 185-197

GUlespie Dam, Ariz., Gila River below 195-197 

Glenwood Springs, Colo., Colorado

River near................... 26-28

Glenwood, Wash., Klickitat River near. 247-248 

Grand Canyon, Ariz., Colorado River

near ........................ 154-160

Grand Coulee Dam, Wash., Columbia

River at..................... 232-234

Grand Junction, Colo., Gunnison River

near ........................ 32-34

Grays River, Wash., West Branch

Grays River near............. 281

Grays River basin.................... 281

Great Basin ......................... 200-205

Green Point Creek below North Fork

near Dee, Oreg. ............. 251

Green River, Utah, Green River at .... 90-95

Green River, Utah, San Rafael River

near ........................ 96-101

283
284 INDEX

Green River, Wyo., Blacks Fork near.... 

Green River, Wyo., Green River near.... 

Green River at Green River, Utah .......

at Jensen, Utah ....................

near Green River, Wyo. ............

near Jensen, Utah..................

near Ouray, Utah ..................

Green River basin......................

Gunnison River near Grand Junction, Colo. 

Gunnison River basin ...................

Gypsnm, Colo., Eagle River below.......

H

Hardness.............................

Heisson, Wash., East Fork Lewis River 

near .........................

Henrys Fork at Linwood, Utah..........

Hite, Utah, Colorado River at..........

Kite, Utah, Dirty Devil River near......

Hood River basin......................

Hoover Dam, Ariz.-Nev., Colorado

River below...................

Hot Sulphur Springs, Colo., Colorado

River at......................

Humboldt River at Beowawe, Nev. ......

at Comus, Nev....................

at Elko, Nev......................

at Palisade, Nev. .................

at Winnemucca, Nev...............

below Lovelock, Nev. .............

near Battle Mountain, Nev. ........

near Deeth, Nev. .................

near Dunphy, Nev. ................

near Imlay, Nev. .................

Humboldt River basin..................

Hydrogen-ion concentration ............

I

Indian Creek near Crescent Mills, Calif. 

Introduction ..........................

Iron .................................

Jensen, Utah, Green River at ... 

Jensen, Utah, Green River near . 

John Day River basin ...........

K

Kaweah River near Three Rivers, Calif... 

Kelso, Wash., Coweman River near......

Kelvin, Ariz., Gila River at ............

King Hill, Idaho, Snake River at.........

Kings River above North Fork, Calif. ....

at Peoples Weir, Calif..............

at Piedra, Calif....................

Klamath River at Somesbar, Calif. ......

below Fall Creek, near Copco, Calif.

near Klamath, Calif. ...............

Klamath River basin....................

Klickitat River near Glenwood, Wash.....

near Pitt, Wash....................

Klickitat River basin ...................

Knappa, Oreg., Big Creek near..........

Knights Landing, Calif., Sacramento

River at.......................

Kosmos, Wash., Rainy Creek near.......

Lake Mead near Boulder City, Nev......

Lake Pleasant Dam, Ariz., Agua Fria

River below....................

Lake Tahoe, South End, (Bijou), Calif...,

West Side, (Tahoe City), Calif.......

North End, (Tahoe Vista), Calif......

Lees Ferry, Ariz., Colorado River at ... 

Lees Ferry, Ariz., Paria River at .....

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

Lewis River basin......................

Lily, Colo., Little Snake River near .....

Page 

53-55 

49-52 

90-95 

71-73 

49-52 

67-70 

77-81 

49-101 

32-34 

32-34 

23-25

13

265

56-57

105-110

102-104

251

182-184

20-22

203

204

203

203

204

204

203

203

203

204

203-204 

12-13

227 

1-3

71-73

67-70

242

206

275-276

185-187

236-237

206

206

206

231

231

231

230

247-248

249-250

247-250

280

220-221 

267-268

176-181

194 

205 

205 

205

136-143

144-146

264

264-265 

64-66

Linwood, Utah, Henrys Fork at........ 56-57

Literature cited...................... 18-19

Little Colorado River at Cameron, Ariz. 153

at Woodruff, Ariz. ............... 147-152

Little Colorado River basin............ 147-153

Littlefield, Ariz., Virgin River at..... 168-174

Little Snake River near Lily, Colo. .... 64-66

Lookout Creek near Blue River, Oreg. . 258-259

Longview, Wash., Abernethy Creek near 277 

Lowell, Oreg., Middle ForkWillamette

River at..................... 255

Lynndyl, Utah, Sevier River near...... 200-201

M

Magnesium.......................... 9

Malad River near Hagerman, Idaho .... 241

Manganese .......................... 9

Mary's River near Deeth, Nev......... 203

Maybell, Colo., Yampa River near..... 58-63

Mayfield, Wash., Cowlitz River near... 271 

McCloud River above Shasta Lake, Calif. 219, 226 

Middle Fork Willamette River at Lowell,

Oreg........................ 255

below North Fork near Oakridge,

Oreg........................ 254

Mineral constituents in solution........ 8-12

Mokelumne River at Lancha Plana,Calif. 215 

at Woodbridge, Calif. .......... 212-213, 215

Montgomery Creek, Calif., Pit River

near........................ 217

Morton, Wash., West Fork Tilton River

near........................ 269-270

N

Neeley, Idaho, Snake River at......... 235

New River near Westmoreland, Calif... 202 

Nicolaus, Calif., Feather River at..... 222-223

Nitrate.............................. 11

North Fork Klaskanine River near Olney,

Oreg........................ 282

North Santiam River below Boulder

Creek near Detroit, Oreg. .... 260 

Notus, Idaho, Boise River at.......... 238-240

Oakridge, Oreg., Middle Fork

Willamette River near .......

Olney, Oreg., North Fork Klaskanine 

River near..................

Ouray, Utah, Green River near.......

Ouray, Utah, Willow Creek near......

Oxygen consumed ...................

Pacific Slope basins in California ......

Pacific Slope basins in Oregon and

Lower Columbia River basia .. 

Pacific Slope basins in Washington and

Upper Columbia River basin... 

Paria River at Lees Ferry, Ariz. .....

Paria River basin ....................

Percent sodium ......................

Pit River near Canby, Calif. ..........

near Montgomery Creek, Calif. ...

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

Price River at Woodside, Utah ........

Properties and characteristics of water. 

Publications .........................

Pyramid and Winnemucca Lakes basin..

R

Rainy Creek near Kosmos, Wash. .....

Handle, Wash., Cispus River near.....

Randlett, Utah, Duchesne River near... 

Rufus, Oreg., Columbia River near....

Russian River at Guerneville, Calif. ..,

near Healdsburg, Calif. .........

near Hopland, Calif. .............

Russian River basin..................

254

282

77-81

85-87

12

206-231 

242-282

232-234

144-146

144-146

14

226

217,226

249-250

88-89

12-14

15-16

205

267-268

266

74-76

243-245 

230 

230 

230 

230
INDEX 285

	Page 

Sacramento River at Delta, Calif. ...... 216,226

at Hamilton City, Calif. ........... 227

at Keswick, Calif. ................ 226

at Knights Landing, Calif. ......... 220-221

at Redding, Calif.................. 227

at Rio Vista, Calif................. 229

at Sacramento, Calif. ............. 228

at Verona, Calif. ................. 228

Sacramento River basin................ 216-229

St. George, Utah, Santa Clara River at.. 166

St. George, Utah, Virgin River near .... 167

Salem, Oreg., Willamette River at ..... 262

Salmon Falls Creek near Buhl, Idaho.... 241

Salt River at Stewart Mountain Dam, Ariz. 188-190

Salton Sea basin....................... 202

San Joaquin River at Antioch, Calif...... 215

at Maze Road, Calif. .............. 215

below Friant, Calif................ 214

near Dos Palos, Calif. ............ 214

near Grayson, Calif. .............. 214

near Mondota, Calif. .............. 214

near Vernalis, Calif............. 207-209, 215

San Joaquin River basin................ 207-215

San Juan River at Shiprock, N. Mex..... 125-128

near Blanco, N. Mex. ............. 113-118

near Bluff, Utah................... 129-135

San Juan River basin .................. 113-128

San Rafael River near Green River, Utah 96-101

Sandy River basin ..................... 252-253

Santa Clara, Utah, Santa Clara River near 165 

Santa Clara River above Winsor Dam,

near Santa Clara, Utah ........ 165

at St. George, Utah ............... 166

Sediment............................. 14-15

Sevier River near Lynndyl, Utah........ 200-201

Sevier Lake basin ..................... 200-201

Shasta Lake, Calif., McCloud River above 219

Shasta Lake, Calif., Squaw Creek above .. 218

Shiprock, N. Mex., San Juan River at... 125-128

Silica................................ 8

Silver Lake, Wash., Toutle River near.. 272

Snake River at King Hill, Idaho......... 236-237

at Neeley, Idaho .................. 235

below Thousand Springs near

Hagerman, Idaho.............. 241

near Burley, Idaho ................ 241

Snake River basin ..................... 235-241

Sodium and potassium.................. 10

Specific conductance................... 13

Squaw Creek above Shasta Lake, Calif. .. 218

Stanislaus River at mouth, Calif. ....... 215

Stewart Mountain Dam, Ariz., Salt River

at ........................... 188-190

Stockton, Calif., Stockton Diverting

Canal at...................... 210-211

Stockton Diverting Canal at Stockton,

Calif......................... 210-211

Stony Creek near Hamilton City, Calif. .. 227

Stream flow........................... 18

Sulfate ............................... 10

Suspended sediment ................... 4-5

Temperature........................

Total acidity........................

Toutle River near Silver Lake, Wash.. 

Trinity River at Lewiston, Calif. .....

near Hoopa, Calif. ..............

Truckee River at Farad, Calif........

near Truckee, Calif. ............

Tulare Lake basin...................

Tuolumne River above La Grange Dam, 

near La Grange, Calif. ......

at Hickman, Calif. ..............

at Tuolumne City, Calif..........

U

Upper Columbia River basin. 

V

Verde River below Bartlett Dam, Ariz... 

Vernalis, Calif., San Joaquin River near. 

Virgin, Utah, Virgin River at ..........

Virgin River at Littlefield, Ariz. .......

at Virgin, Utah ...................

near St. George, Utah .............

Virgin River basin.....................

W

Warm Springs, Oreg., Warm Springs

near .........................

Warm Springs at Hehe Mill near Warm

Springs, Oreg. ...............

Washington, Utah, Washington Fields

Canal near....................

Washington Fields Canal near Washington,

Utah .........................

Watson, Utah, White River near. ._ r-..-r. 

Weiser River at Weiser, Idaho '.........

West Branch Grays River near Grays

River, Wash..................

West Fork Tilton River near Morton,

Wash.........................

White River near Watson, Utah .........

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

Willamette River basin ................

Willow Creek near Ouray, Utah.........

Woodbridge, Calif., Mokelumne River at 

Woodruff, Ariz., Little Colorado River at 

Woodside, Utah, Price River at ........

Yampa River near Maybell, Colo. ......

Yuba River at Marysville, Calif. .......

at Smartsville, Calif. .............

Yuma, Ariz., Yuma Main Canal at......

Yuma Main Canal below Colorado River 

Siphon, at Yuma, Ariz.........

Youngs River basin....................

Page 

5

13 

272 

231 

231 

205

205

206

214

214

214

232-234

191-193 

207-209 

161-163 

168-174 

161-163 

167 

161-174

246

246

164

164

82-84

241

281

269-270

82-84

262

254-263 

85-87

212-213

147-152 

88-89

58-63

228

227

198-199

198-199 

282

ftU. S. GOVERNMENT PRINTING OFFICE : 1955 O - 356ZZ9