Quality of Surface 

Waters For Irrigation 

Western United States 

1951

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

GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1264

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1954
UNITED STATES DEPARTMENT OF THE INTERIOR 

Douglas McKay, Secretary

GEOLOGICAL SURVEY 

W. E. Wrather, Director

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

Washington 25, D. C. - Price $1 (paper cover)
PREFACE

This report was prepared by the Geological Survey in cooperation with other State and Federal 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

District Supervisors (Quality of Water)

P. C. Benedict ..................... Lincoln, Nebr.

G. A. Billingsley .................Fayetteville, Ark.

T. B. Dover...................... Stillwater, Okla.

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

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

Burdge Irelan ........................ Austin, Tex.

I. W. Walling ................... Sacramento, Calif.

Ill

CONTENTS

Page

Introduction ......................................... 1

Acknowledgments .................................... 5

Collection of samples ................................ 6

Examination of samples .............................. 6

Reporting of data ...................:................ 7

Explanation of tables ................................. 8

Location of station .................................. 8

Drainage area ...................................... 8

Records available .................................. 8

Extremes .......................................... 8

Remarks........................................... 8

Discharge records .................................. 8

Analytical values ................................... 8

Discussion of results ................;................ 9

Criteria of water quality .............................. 9

Selected references .................................. 14

Quality of surface waters for irrigation ................. 15

Part 5-Hudson Bay and Upper Mississippi River basins . 15

Red River of the North basin ....................... 15

Sheyenne River near Warwick, N. Dak. ........... 15

Part 6-Missouri River basin ......................... 16

Missouri River main stem ......................... 16

Missouri River near Williston, N. Dak. ........... 16

Missouri River at Pierre, S. Dak. ................ 18

Missouri River at Nebraska City, Nebr. .......... 20

Yellowstone River basin ........................... 22

Yellowstone River at Billings, Mont............... 22

Yellowstone River near Sidney, Mont. ............ 24

Bighorn River at Thermopolis, Wyo. ............. 25

Bighorn River at Bighorn, Mont. ................. 27

Tongue River at Miles City, Mont. ................ 28

Powder River near Locate, Mont. ................ 30

Grand River basin ................................ 31

Grand River near Wakpala, S. Dak. .............. 31

Cheyenne River basin ............................. 33

Cheyenne River near Eagle Butte, S. Dak. ......... 33

Platte River basin ................................. 35

North Platte River below Guernsey Reservoir, Wyo. 35

Platte River at Brady, Nebr. .................... 36

Supply Canal (Tri-County Diversion) near Maxwell,

Nebr. ........................................ 38

V
VI CONTENTS

Quality of surface waters for irrigation--Continued 

Missouri River basin Continued

Platte River basin Continued Page

South Platte River at Julesburg, Colo. ............ 39

Kansas River basin ............................... 42

Republican River at Cambridge, Nebr. ............ 42

Saline River at Tescott, Kans. ................... 44

Part 7-Lower Mississippi River basin ................ 46

Arkansas River basin ............................. 46

Arkansas River below John Martin Reservoir, Colo. 46

Arkansas River at Ralston, Okla. ................ 48

Arkansas River at Van Buren, Ark. .............. 51

Cimarron River at Mannford, Okla. .............. 54

Canadian River near Tascosa, Tex. .............. 57

Canadian River near Whitefield, Okla. ............ 59

Red River basin .................................. 63

Red River at Denison Dam near Denison, Tex. .... 63

Washita River near Tabler, Okla. ................ 64

Part 8-Western Gulf of Mexico basins ................ 66

Sabine River basin ................................ 66

Sabine River near Ruliff, Tex. ................... 66

Neches River basin ............................... 68

Neches River at Evadale, Tex. .................. 68

San Jacinto River basin ........................... 70

San Jacinto River near Huffman, Tex. ............. 70

Brazos River basin ............................... 72

Brazos River at Richmond, Tex. ................. 72

Colorado River basin ............................. 74

Colorado River at Robert Lee, Tex. .............. 74

Colorado River at Austin, Tex. .................. 76

Colorado River at Wharton, Tex. ................. 77

Guadalupe River basin ............................ 78

Guadalupe River at Victoria, Tex. ................ 78

Nueces River basin ............................... 80

Nueces River near Mathis, Tex. ................. 80

Rio Grande basin ................................. 81

Rio Grande above Culebra Creek near Lobatos, Colo. 81

Rio Grande at Otowi Bridge near San Ildefonso,N.Mex. 83

Rio Grande (Tiffany Channel) at Tiffany, N. Mex. .. 85

Rio Grande at San Marcial, N. Mex. .............. 87

Rio Grande below Elephant Butte Outlet, N. Mex. .. 89

Rio Grande near El Paso, Tex. .................. 90

Rio Grande below Old Fort Quitman, Tex. ......... 91

Rio Grande at Upper Presidio, Tex. .............. 92

Rio Grande at Langtry, Tex. ...................... 93

Rio Grande at Eagle Pass, Tex. .................. 94

Rio Grande at Roma, Tex. ....................... 95

Pecos River below Alamogordo Dam, N. Mex. ..... 96

Pecos River near Artesia, N. Mex. .............. 98

Pecos River near Orla, Tex. .................... 100

Pecos River near Comstock, Tex. ................ 101
CONTENTS VII

Quality of surface waters for irrigation--Continued Page

Part 9-Colorado River basin ......................... 102

Colorado River main stem ......................... 102

Colorado River near Glenwood Springs, Colo. ...... 102

Colorado River near Cisco, Utah ................. 104

Colorado River at Lees Ferry, Ariz. ............. 106

Colorado River near Grand Canyon, Ariz. ......... 108

Colorado River below Hoover Dam, Ariz. -Nev. .... 110

Diversions and Return Flows at and below Imperial Dam 112 

Yuma Main Canal below Colorado River siphon at

Yuma, Ariz. .................................. 112

Gunnison River basin.............................. 114

Gunnison River near Grand Junction, Colo. ........ 114

Green River basin ................................ 116

Green River at Green River, Utah ................ 116

San Juan River basin .............................. 118

San Juan River near Blanco, N. Mex. ............. 118

Little Colorado River basin ........................ 120

Little Colorado River at Cameron, Ariz. .......... 120

Virgin River basin ................................ 121

Virgin River at Littlefield, Ariz. ................. 121

Gila River basin .................................. 123

Gila River at Kelvin, Ariz. ...................... 123

Gila River below Gillespie Dam, Ariz. ............ 125

Salt River at Stewart Mountain Dam, Ariz. ........ 127

Verde River below Bartlett Dam, Ariz. ........... 129

Outflow from Lake Pleasant, Ariz. ............... 131

Part 10-The Great Basin ............................ 132

Sevier Lake basin................................. 132

Sevier River near Lynndyl, Utah ................. 132

Part 11-Pacific Slope basins in California ............. 134

San Joaquin River basin ........................... 134

San Joaquin River main stem ....................... 134

San Joaquin River near Vernalis, Calif. ........... 134

Calaveras River basin ............................ 136

Stockton Diverting Canal at Stockton, Calif. ....... 136

Mokelumne River basin............................ 137

Mokelumne River at Woodbridge, Calif. ........... 137

Sacramento River basin ........................... 138

Sacramento River main stem....................... 138

Sacramento River at Knights Landing, Calif. ...... 138

Feather River basin .............................. 139

Feather River at Nicolaus, Calif. ................ 139

American River basin ............................. 140

American River at Fair Oaks, Calif. ............. 140

Part 12-Pacific Slope basins in Washington and Upper

Columbia River basin .......................... 142

Upper Columbia River basin ....................... 142

Columbia River main stem ........................ 142

Columbia River at Grand Coulee Dam, Wash. ...... 142
VIII CONTENTS

Quality of surface waters for irrigation--Continued Page

Part 13-Snake River basin ........................... 144

Snake River main stem ............................ 144

Snake River at King Hill, Idaho ................... 144

Boise River basin ................................ 145

Boise River at Notus, Idaho ...................... 145

Part 14-Pacific slope basins in Oregon and Lower

Columbia River basin .......................... 147

Columbia River main stem......................... 147

Columbia River at Maryhill Ferry near Rufus, Oreg. 147

Willamette River basin ............................ 149

Willamette River at Salem, Oreg. ................ 149

Index ............................................... 151

ILLUSTRATIONS

Page 

Plate 1. Recommended stations for irrigation-quality

network in Western United States. ............... 6

Plate 2. Concentrations in equivalents per million and 

per cent-sodium values at typical irrigation network stations, 1951. ........................... 10
QUALITY OF SURFACE WATERS

FOR IRRIGATION, 

WESTERN UNITED STATES, 1951

INTRODUCTION

The records of chemical analyses, other physical measurements, and discharge given in this report comprise the first annual compilation of data for 78 irrigation network stations in operation west of the Mississippi River.

Increased development of irrigation agriculture in the Western States during the past decade has brought sharply into focus 

the need for comprehensive continuing information about the chemical quality of surface waters used for irrigation and the changes 

resulting from the drainage of irrigated lands. The U. S. Census of 

Agriculture for 1945 reports that approximately 20. 5 million acres 

of land were irrigated in 1944; of this acreage nearly 95 percent was in the 17 Western States. Straus (1952) estimates that 

the acreage of irrigated land in the Western States had increased 

to 21. 5 million acres in 1948. In 1934, an estimate by the National Resources Board placed the ultimate acreage that could be 

irrigated in the Western States at 51. 5 million acres.

The 17 Western States contain approximately 22 percent of the 

nation's population and 60 percent of the land area, of which about 

1 acre in 10 of the arable lands in these States is irrigated.

All natural waters contain mineral salts in solution. Ordinary 

irrigation practice concentrates much of the salt burden of the input water in the ground and drainage waters owing to evaporation 

and transpiration. Where drainage is not adequate, this results 

in excessive concentrations of soluble salts in the soil solution. 

Since crops cannot tolerate excessively concentrated soil solutions, it is necessary to provide drainage so that the excess of 

salts can be leached out of the soil. The removal of mineral salts 

through proper drainage facilities is essential to the maintenance 

of a favorable salt balance in the soil.

The water in many of the surface streams of the West has 

been, or soon will be, completely allocated for specific pur poses, 

often primarily for irrigation. Some of these allocations have 

been made without consideration of their effect on the quality of 

the downstream water or without adequate allowance for drainage 

purposes so that a proper salt balance can be maintained. As a 

result the productivity of many thousands of acres of agricultural 

land has been impaired due to the accumulation of excessive amounts of mineral salts. It is becoming increasingly apparent

1
2 QUALITY FOR IRRIGATION, 1951

that more judicious use must be made of available water for maintaining suitable quality and removing accumulations of salt. In 

order to provide for maximum beneficial water use it is essential 

to have available continuous records of the chemical quality of 

surface waters at key stations on the main streams that are used 

for irrigation. These continuous long-term records will assist 

in the determination of quality of water prior to irrigation development, the extent of impairment of water quality due to drainage 

return, requirements for maintaining proper salt balance, and 

the equitable division of water betweenprojects, States, and adjoining nations.

In recognition of the problem the Subcommittee on Hydrology, 

Federal Inter agency River Basin Committee on February 6, 1950, 

approved a list of 106 network stations on streams in We stern 

United States at which water samples were to be collected and analyzed with particular reference to the use of these stream waters 

for irrigation. These stations, with pertinent information about 

periods of operation, are shown in the following table. Of the 106 

stations selected, 39 were already being operated by the Geological Survey and 7 by the International Boundary and Water Commission. From the remaining stations on the list, 30 were selected for activation by the U. S. Geological Survey during the 

fiscal year 1951. In addition, 3 stations previously operated in 

connection with other programs and scheduled to be discontinued 

were to be included in the list to be operated by the Geological 

Survey (the.Subcommittee amended the list on October 2, 1952, 

to include the three additional stations, bringing the recommended 

number of irrigation network stations to a total of 109).

It was contemplated that the network stations would be located 

at stream-flow gaging stations and that the program of collecting 

and analyzing the samples and reporting the findings would be the 

responsibility of the Geological Survey. The scope of the chemical analyses would provide for the calculation of the salt burden 

of streams and in general would conform with the current Geological Survey standards for the comprehensive investigation of 

the chemical quality of surface waters.

The following criteria were recommended in the selection of 

of the key network stations:

1. All recommended stations should be located on streams 

west of the main stem of the Mississippi River.

2. All proposed stations should relate primarily to irrigation 

although multiple-pur pose needs which include irrigation may be 

considered.

3. All stations should be located at or near stream-flow gaging stations. The most nearly up-to-date list of gaging stations 

currently operated by the U. S. Geological Survey (which com-
RECOMMENDED IRRIGATION NETWORK STATIONS

Irrigation-Quality Network Stations in Western United States 

/Selected by Subcommittee on Hydrology, Federal Interagency River Basin Committee, 195P7

 

No.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

18 a.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30.

31.

32.

33.

34.

35.

36.

37.

38.

39.

40.

41.

42.

43.

44.

45.

46.

47.

48.

49.

50.

51.

52.

53.

54.

55.

56.

57.

58.

59.

60.

Geological 

Survey 

Part 

no.

5

6

7

8

9

Stream

Sour is River

Missouri River

Missonri River

Missouri River

Yellowstone River

Yellowstone River

Bighorn River

Bighorn River

Tongue River

Powder River

Grand River

Moreau River

Cheyenne River

White River

James River

N. Platte River

N. Platte River

Platte River

Supply Canal (Tri-County

Diversion)

South Platte River

Republican River

Republican River

Smoky Hill River

a Saline River

Arkansas River

Arkansas River

Arkansas River

Arkansas River

Cimarron River

Canadian River

Canadian River

Red River

bWashita River

Sabine River

Neches River

Trinity River

San Jacinto River

Brazos River

Colorado River

Colorado River

Colorado River

Guadalupe River

Nueces River

Rio Grande

Rio Grande

Rio Grande

Rio Grande

c Rio Grande

c Rio Grande

c Rio Grande

c Rio Grande

c Rio Grande

c Rio Grande

Pecos River

Pecos River

Pecos River

c Pecos River

Colorado River

Colorado River

Colorado River

Colorado River

Location

nr. Westhope, N. Dak.

nr. Williston, N. Dak.

at Pierre, S. Dak,

at Nebraska City, Nebr.

at Billings, Mont.

nr. Sidney, Mont.

at Thermopoiis, Wyo.

at Bighorn, Mont.

at Miles City, Mont.

, nr. Locate, Mont.

nr. Wakpala, S. Dak.

at Promise, S, Dak.

nr. Eagle Butte, S. Dak.

nr. Oacoma, S. Dak.

nr. Huron, S. Dak.

below Alcova Dam, Wyo.

below Guernsey Reservoir, Wyo.

at Brady, Nebr.

nr. Maxwell, Nebr,

at Julesburg, Colo,

at Cambridge, Nebr.

nr. Hardy, Nebr.

nr. Langley, Kans.

nr. Wilson (or Russell), Kans.

at Tescott, Kans.

below John Mar tin Reservoir, Colo.

at Arkansas City, Kans,

at Ralston, Okla.

at Van Buren, Ark.

at Mannlord, Okla.

at Perkins, Okla,

nr. Tascosa, Tex.

nr. Whitefield, Okla.

at Denison Dam, nr. Denison, Tex.

nr. Tabler, Okia.

nr. Ruliff, Tex.

at Evadale, Tex.

at Romayor, Tex.

nr. Huffman, Tex.

at Richmond, Tex.

at Robert Lee, Tex.

at Austin, Tex.

at Wharton, Tex.

at Victoria, Tex.

nr. Mathis, Tex.

above Culebra Cr. nr. Lobatos, Colo

at Otowi Bridge nr. San

Ildefonso, N. Mex.

at San Marcial, N. Mex.

be low Elephant Butte Outlet, N. Mex.

nr. El Paso, Tex.

below Old Fort Quitman, Tex.

at Upper Presidio, Tex.

at Langtry, Tex.

at Eagle Pass, Tex.

at Roma, Tex.

below Alamorgordo Dam, N. Mex.

nr. Artesia, N. Mex.

nr. Orla, Tex.

nr. Comstock, Tex.

nr. Glenwood Springs, Colo.

nr. Cisco, Utah

at Lees Ferry, Ariz.

nr. Grand Canyon, Ariz.

Date 

established

_

12/5/50

1/4/51

12/15/50

1/3/51

1/1/51

--

1/4/51

1/4/51

1/17/51

--

1/17/51

12/7/51

2/26/51

3/1/51

10/1/45

12/22/50

--

--

4/3/50

1/10/51

10/8/51

1/1/50

10/1/45

10/1/49

10/1/52

6/2/48

9/1/46

5/1/44

9/10/46

10/1/47

10/1/47

9/1/45

9/1/45

9/1/45

10/1/47

4/11/44

9/1/45

10/1/47

10/11/46

10/23/47

7/1/48

..

--/--/30

~/~/30

--/--/35

~/--/45

--/--/38

~/~/44

6/26/37

7/1/37

7/1/37

-/-/35

10/--/41

10/--/28

10/1/47

10/-/39
QUALITY FOR IRRIGATION, 1951

Irrigation-Quality Network Stations in Western United States Continued 

/Selected by Subcommittee on Hydrology, Federal Interagency River Basin Committee, 19507

No.

61.

62.

63.

64.

65.

66.

67.

68.

69.

70.

71.

72.

73.

74.

75.

76.

77.

78.

79.

80.

81.

82.

83.

84.

64 a.

85.

86.

87.

88.

89.

90.

91.

92.

93.

94.

95.

96.

97.

98.

99.

100.

101.

102.

103.

104.

105.

106.

107.

106.

109.

Geological 

Survey 

Part 

no.

9

10

il

12

13

14

5

6

9

Stream

Colorado River

Colorado River

Colorado River

(Yuma Main Canal)

Gunnison River

Green River

Green River

San Juan River

San Juan River

Little Colorado River

Gila River

Gila River

Salt River

Verde River

Agua Fria River

Bear River

Sevier River

Sevier River

Humboldt River

Humboldt River

San Joaquin River

San Joaquin River

San Joaquin River

San Joaquin River

dCalaveras River (Stockton

Diverting Canal)

San Joaquin River

Kokelumne River

Sacramento River

Sacramento River

Feather River

American River

Columbia River

-Columbia River

Kootenai River

Pend Oreille River

Yakima River

Snake River

Snake River

Snake River

Snake River

Snake River

Boise River

Boise River

Columbia River

Deschutes River

Willamette River

Rogue River

Sheyenne River

Location

below Hoover Dam, Ariz. -Nev.

below Parker Dam, Calif.

below Colorado River Siphon

at Yuma, Ariz.

nr. Grand Junction, Colo.

nr. Linwood, Utah

at Green River, Utah

nr. Blanco, N. Mex.

nr. Bluff, Utah

at Cameron, Ariz.

at Kelvin, Ariz.

below Gillespie Dam, Ariz.

at Ste wart Mountain Dam, Ariz.

below Bartlett Dam, Ariz.

outflow from lake Pleasant Dam,

Ariz.

nr. Collinston, Utah

nr. Marys ville, Utah

nr. Lynndyl, Utah

at Palisade, Nev.

nr. Rye Patch, Nev.

below Friant Dam, Calif.

nr. Mendota, Calif.

nr. Vernalis, Calif.

at Antioch, Calif.

at Stockton, Calif.

nr. Mendota, Calif.

at Woodbridge, Calif.

nr. Red Bluff, Calif.

at Knights Landing, Calif.

at Nicolaus, C?lif.

at Fair Caks, Calif.

at International Boundary

at Grand- Coulee Dam, Wash.

at Porthill, Idaho

nr. Metaline Falls, Wash.

atKiona, Wash.

nr. Heise, Idaho

nr. Minidoka, Idaho

at King Hill, Idaho

at Weiser, Idaho

nr. Clarkston, Wash.

nr. Arrowrock, Idaho

at Notus, Idaho

at Maryhill, Ferry nr. Rufus, Oreg.

at Moody nr. Biggs, Oreg,

at Salem, Oreg.

at Grants Pass, Oreg.

nr. Warwick, N. Dak.

Stations added by Subcommittee, October 2, 1952

North Platte River

Platte River

Virgin River

at Lewellen, Nebr.

nr. Ashland, Nebr.

at Littlefield, Ariz.

Date 

established

10/ /39

10/ /42

10/--/31

__

10/ /28

10/1/45

10/--/29

1/17/51

12/1/50

12/1/50

12/9/50

12/9/50

12/1/50

..

--

3/22/51

_

12/10/51

--

3/1/51

--

3/1/51

10/« /52

3/1/51

2/26/51

2/26/51

5/1/51

11/15/51

11/25/50

_.

_-

__

3/27/51

__

11/14/51

11/21/50

12/1/50

2/1/51

1/8/51

_

__

7/«/49

a Dropped from list 10/3/52. Replaced by Station at Tescott.

b Dropped from list 10/3/52. Replaced by Station at Pauls Valley.

c Operated by International Boundary and Water Commission.

d Dropped from list 10/3/52. Replaced by Station on San Joaquin River near Mendota.
ACKNOWLEDGMENTS 5

prises all but a small percentage of all gaging stations) will be 

found in the most recently published Geological Survey watersupply papers for the areas involved.

4. Consideration should be given to the location of irrigation 

development areas which are now affecting or are likely to affect 

the chemical quality of the river water.

5. Only those stations should be proposed that are likely to 

reflect important changes in chemical quality over a period of 

years. Stations operated for relatively short periods (5 years or 

less), as would be required for intensive studies of specific projects, should not in general be included.'

Plate 1 is a plot of the recommended list of 106 network stations on streams in Western United States. The 78 stations in operation in 1951 are identified by a solid circle. The period of record, in years, is also shown at each of these stations. In a few 

instances the period of record differs from that obtained from the 

date established by the Subcommittee, as earlier records were 

included also. Proposed stations are identified by an open circle.

ACKNOWLEDGMENTS

Agencies which have each contributed to some part of the data 

published herein include: The Agriculture Research Service, and 

the Soil Conservation Service, U. S. Department of Agriculture; 

the Bureau of Reclamation, U. S. Department of the Interior; the 

Corps of Engineers, U. S. Department of the Army; the State engineers for each of the 17 Western States and for Louisiana and 

Arkansas, the State Boards of Health, the El Paso, Tex., Department of Water and Sewage; the Ministry of Hydraulic Resources 

of Mexico.

During 1951, the United States Section of the International 

Boundary and Water Commission operated the stream gaging stations for the following Rio Grande stations included in this report: 

El Paso, Fort Quitman, Upper Presidio, and Langtry; it operated 

the station Pecos River near Comstock, also. The Mexican Section operated the stream gaging stations on the main stem at Eagle 

Pass and Roma. Each section operated the gaging stations on 

tributary streams, floodways, and diversions within its own country.

Descriptive headings and discharge dataforthe seven stations 

operated by the International Boundary and Water Commission, 

were obtained from Water Bulletins 20 and 21 prepared jointly by 

the United States and Mexican Sections of the International Boundary and Water Commission. These publications contain stream 

discharge and related data for 1950 and 1951. Analyses for eight 

stations were obtained from the U. S. Salinity Laboratory, Riverside, Calif.
6 QUALITY FOR IRRIGATION, 1951

Additional contributions of data have been made by individuals, 

corporations, and other State and Federal agencies, and their cooperation is acknowledged with appreciation.

COLLECTION OF SAMPLES

In accordance with the recommendation of the Subcommittee, 

where practicable, one sample was collected each day throughout the water year. In general, each sample was taken in an 

8- or 12-ounce glass bottle provided with a pressure-type or positive-seal closure to prevent escape of dissolved gases. Each 

sample was integrated in the vertical section of a stream usually 

at about midpoint of flow by lower ing the open sample bottle to the 

bottom and returning it to the surface during the filling process.

At most stations the samples were collected by local residents 

hired for the purpose. The local sample collector recorded on 

each bottle the name of the stream, location, gage height (if practicable), water temperature, time of day, date, and collector's 

name or initials. Samples were shipped to the laboratory or 

picked up by technical personnel on a predetermined schedule. 

Visits were made periodically by technical personnel to check on 

sampling procedures.

EXAMINATION OF SAMPLES

Upon receipt of samples in the laboratory, they were recorded and stored away from direct sunlight until opened for analysis. 

Specific conductance was determined with a conductance bridge 

on each sample as soon as opened. These data provided a basis 

for compositing a series of daily samples, for complete analysis. 

In general, a minimum of three composites a month consisting 

of equal volumes of approximately 10 daily samples, were prepared for chemical analysis. Individual samples that show differences in conductance of more than 30 percent of the mean for 

the period were not included in the composite, but were grouped 

separately for additional composite samples or analysis ol the 

individual sample was made. For those stations where acceptable discharge values were reported with the samples, or could 

be obtained promptly from rating tables, samples were prepared 

by mixing values of individual samples in proportion to water discharge.

The following series of 15 determinations (schedule 1) were 

made on all composite samples for all new network stations during the first year of operation: Silica, iron, calcium, magnesium, 

sodium, potassium, bicarbonate, carbonate, sulfate, chloride, 

fluoride, nitrate, boron, dissolved solids, and specific conductance. The following values were calculated from the analytical 

data: Dissolved solids in tons per acre-foot, dissolved solids in
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1264 PLATE 1

EXPLANATION

£ 46 

1

Quality-of-woter station in operation, 1951. 

Upper number refers to station index. 

Lower number refers to years of available chemical-quality records

196

Proposed quality-af-water station

5IOR GEOLOGICAL SURVgY. WASHINGTON

RECOMMENDED STATIONS FOR IRRIGATION-QUALITY NETWORK IN WESTERN UNITED STATES

REPORTING OF DATA 7

total tons, total hardness, noncarbonate hardness, and percent 

sodium.

It was further recommended by the Subcommittee that during 

the second and third years the following series of 11 determinations (schedule 2) would be made on all composite samples: Calcium, magnesium, sodium, bicarbonate, carbonate, sulfate, chloride, nitrate, boron, dissolved solids, and specific conductance. 

Hardness, noncarbonate hardness, percent sodium, total tons 

and tons per acre-foot would be calculated as in schedule 1.

For the 1951 data there were notable exceptions to the recommended schedules as outlined above. At some stations, where 

more complete data were needed for other uses, the number of 

constituents determined was increased. Conversely, some stations that had been in operation for several years prior to this 

project, during which time at least the minimum determinations 

in schedule 1 were completed, were immediately placed on a reduced analytical schedule.

In the fourth and succeeding years (unless significant changes 

become apparent) it was recommended that the following determinations (schedule 3) would be made on all composite samples as 

long as the program is in effect: Calcium and magnesium (either 

separately, or together by the recently developed ethylenediamine 

tetraacetic acid titration test for hardness), sodium, dissolved 

solids, and specific conductance. In addition, four complete analyses (schedule 1) would be made each year, one analysis to be 

made on a composite sample during each quarter. Certain additional determinations above these minimum requirements were 

to be made if deemed necessary to define widely varying characteristics of the stream water.

All laboratory determinations were to be made in accordance 

with standard procedures used by the Geological Survey. These 

procedures are based on methods found in authoritative publications on water analysis.

REPORTING OF DATA

In order to release the data in the form most widely used in 

the evaluation of irrigation waters, the results of analyses in this 

compilation are given in equivalents per million, rather than the 

conventional unit part per million. Some agencies that actively 

participate in irrigation water-quality investigations prefer to express results in milligrams per liter (mg/1) and milliequivalents 

per liter (me/I). However, for all practical purposes where concentrations of dissolved solids are less than about 7,000 parts 

per million, no correction for density of the water is necessary 

and the units reported in each method are considered to be synonymous.
8 QUALITY FOR IRRIGATION,1951

If results are desired in parts per million they can be calculated 

by multiplying the reported values in equivalents per million by 

the chemical combining weights of the individual constituents. 

Pertinent physical data and water discharge are also included in 

the tables.

EXPLANATION OF TABLES

The tables of analyses beginning on page 15 include a brief 

descriptive heading summarizing the more pertinent features at 

each station as follows:

Location of station is given generally as the distance in land 

or river miles from a. town or other political or geographic feature. In Survey practice the term "at" generally implies that the 

station is within a mile radius of the named town whereas "near" 

implies that it is beyond a mile radius.

Drainage area above the gaging station was obtained from the 

most recent published records of the annual reports of the Geological Survey on Surface Water of the United States, and from 

the International Boundary and Water Commission Water Bulletins 20 and 21.

Records available are givenfor all periods during which samples, other than infrequent, were collected for chemical analyses. 

It does not include the periods for which discharge records are 

available.

Extremes for the current year's record are reported for specific conductance and percent sodium because of their widespread 

application in the evaluation of water analysis for irrigation. The 

results for specific conductance are based on the measurement 

made at the laboratory upon receipt of the sample from the field. 

Data for percent sodium were obtained from the composite-sample analyses.

Remarks include sources of data, additional explanation concerning the records, and offices where the records of chemical 

quality may be obtained.

Discharge records were obtained from the responsible Geological Survey Surface Water Branch offices except for the seven 

stations operated by the International Boundary and Water Commission. Discharge data are shown in acre-feet, calculated from 

the mean daily discharge in cubic feet per second by multiplying 

by the factor 1.983.

Analytical values are reported in equivalents per million for 

cations and anions. The equivalent is the weight with reference
DISCUSSION OF RESULTS 9

to some standard (such as the combining weight either of oxygen, 8, or of hydrogen, 1.008) of that quantity of an element, radical, or compound, that will react with another element, radical, 

or compound to complete a definite chemical reaction. An equivalent of an element or ion is exactly equal in combining power to 

one equivalent of another element or ion. As previously discussed, for concentrations of dissolved solids that are normally 

encountered in water for irrigation, an equivalent per million is 

equal to a milliequivalent per liter. Silica, which is considered 

to be present in the colloidal state, and boron, are reported in 

parts per million. Percent sodium is calculated as follows:

.- ^ ~ r= where all constituents are reported in equiv- Na + K + Ca + Mg, F H

alents per million.

DISCUSSION OF RESULTS

Discharge data and dissolved-solids loads for stations operated in 1951 are summarized in the following table. During the 

year the highest weighted average annual concentration observed 

was for the Pecos River near Or la, Tex. (6.23 tons per acrefoot) and the lowest was for the Columbia River at Grand Coulee 

Dam, Wash. (0.12 ton per acre-foot). However, part-year records at other stations indicate that the lower value may not have 

been the minimum had the observations been made for the entire 

year at all stations.

The median value for 57 weighted-average annual observed 

concentrations of dissolved solids was 0. 67 ton per acre-foot or 

about 492 ppm; the middle 50 percent of concentrations ranged 

between 0.4 and 1.25 tons per acre-foot.

Diagrams showing dissolved-solids concentrations in equivalents per million and percentages of sodium in water at typical 

network stations are given in plate 2.

CRITERIA OF WATER QUALITY

Many different classifications of water for irrigation appear 

in the literature; however, most of the development in this field 

has been made in the last 30 years. Scofield and Headley (1921) 

were among the first important contributors to water-quality criteria; they pointed out the hazards from the use of high-sodium 

water. In 1933, Scofield established limits for water for irrigation with reference to salinity, boron, chloride, and sulfate.

Eaton (1935) proposed five classes of water based on electrical conductivity, percent sodium, and boron. Scofield (1936) proposed a similar grouping for specific conductance, and percent 

sodium, but a further grouping of boron into 15 classes, involving
10 QUALITY FOR IRRIGATION, 1951 

Summary of water discharge, and tonnages of dissolved solids

Station

Runoff 

(acre-fe«»t)

Dissolved solids 

(tons per 

acre-foot)

Red River of the North basin 

Sheyenne River nr. Warwick, N. Dak. .............. a/40,140

Missouri River main stem

Missouri River nr. Williston, N. Dak. .............. a/15,760,000

Missouri River at Pierre, S. Dak. ................. a/14,230,000

Missouri River at Nebraska City, Nebr. ............ a/32,340,000

Yellowstone River basin

Yellowstone River at Billings, Mont. ............... a/5,201,000

Yellowstone River nr. Sidney, Mont. ............... a/8,245,000

Bighorn River at Thermopolis, Wyo. ...:........... a/1,370,000

Bighorn River at Bighorn, Mont. ................... a/2,721,000

Tongue River at Miles City, Mont. ................. a/190, 500

Powder River near Locate, Mont. .................. a/177,400

Grand River basin 

Grand River nr. Wakpala, S. Dak. ................. a/114,300

Cheyenne River basin

Cheyenne River nr. Eagle Butte, S. Dak. ........... a/173,100

Platte River basin

North Platte River below Guernsey Reservoir, Wyo. . 

Platte River at Brady, Nebr. ..................... a/203,100

Supply Canal (Tri-County Diversion) nr. Maxwell, Nebr. a/791 , 200 

South Platte River at Julesburg, Colo. ............. a/146,000

Kansas River basin

Republican River at Cambridge, Nebr. ............. a/365,300

Saline River at Tescott, Kans. .................... a/872,300

Arkansas River basin

Arkansas River below John Martin Reservoir, Colo. ... a/160,900

Arkansas River at Ralston, Okla. .................. 9,246,648

Arkansas River at Van Buren, Ark. ................ 33,274,920

Cimarron River at Mannford, Okla. ................

Canadian River nr. Tascosa, Tex. ................. 141,800

Canadian River nr. Whitefield, Okla. ............... 3,326,623

Red River basin

Red River atDenisonDamnr. Denison, Tex. ......... 5,062,000

Washita River nr. Tabler, Okla. ................... 585,688

Sabine River basin

Sabine River nr. Ruliff, Tex. .................... 3,167,000

Neches River basin 

Neches River at Evadale, Tex. .................... 1,478,000

San Jacinto River basin

San Jacinto River nr. Huffman, Tex................. 171,200

Brazos River basin 

Brazos River at Richmond, Tex. ................... 1,027,000

Colorado River basin 

Colorado River at Robert Lee, Tex. ................ 54,840

Colorado River at Austin, Tex. .................... *M,Mn

Colorado River at wnarton, Tex. ................. 646,000

Guadalupe River basin

Guadalupe River at Victoria, Tex. ................ 392,200

Nueces River basin

Nueces River nr. Mathis, Tex. ................... 422,200

Rio Grande basin

Rio Grande above Culebra Creek nr. Lobatos, Colo. 79,980 

Rio Grande at Otowi Bridge nr. Sanlldefonso, N. Mex. 395,400 

Rio Grande (Tiff any Channel) at Tiff any, N. Mex. ..... 14,930

Rio Grande at San Marcial, N. Mex................. 118,100

Rio Grande below Elephant Butte Outlet, N. Mex. .... 451,100

Rio Grande nr. El Pasp, Tex. ..................... 273,030

Rio Grande below Old Fort Quitman, Tex. .......... 50,079.8

Rio Grande at Upper Presidio, Tex. ................ 48.829.2

Rio Grande at Langtry, Tex. ...................... 864,600

Rio Grande at Eagle Pass, Tex. ................... 1,310,870

Rio Grande at Roma, Tex. ........................ 1,990,100

0.55

.51 

.53 

.52

.23 

.48 

.47 

.67 

.59 

1.51

.59 

1.80

.57

.72

1.80

.40 

.67

2.38 

.81 

.64

.85 

1.59

1.24 

.90

.18 

.19 

.36 

.95

1.21 

.38 

.40

.50 

.31

.34

.33

1.37

.77
GEOLOGICAL SURVEY WATER-SUPPLY PAPER 1264 PLATE 2

75

50 

Percent sodium

I Inch radius equals 25 equivalents 

per million, cations or anlans

CONCENTRATIONS IN EQUIVALENTS PER MILLION AND PERCENT-SODIUM VALUES AT TYPICAL IRRIGATION NETWORK STATIONS, 1951

318476 O - 54 (Face p. 10)

SUMMARY OF WATER DISCHARGE 11

Summary of water discharge, and tonnages of dissolved solids--Continued

Station

Runoff 

(acre-feet)

Dissolved solids 

(tons per 

acre -foot)

Rio Grande basin Continued

Pecos River below AlamogordoDam, N. Mex. ....... 149,400

Pecos River nr. Artesia, N. Mex. ................. 139,200

Pecos River nr. Orla, Tex. ......'.......;........ 110,300

Pecos River nr. Comstock, Tex. .................. 147,480

Colorado River main stem 

ColoradoRiver nr. GlenwoodSprings, Colo. ......... a/1,836,000

Colorado River nr. Cisco, Utah .................... a/2,892,000

Colorado River at Lees Ferry, Ariz. ............... 9,817,000

Colorado River nr. Grand Canyon, Ariz. ........... a/9,110,000

Colorado River below Hoover Dam, Ariz. -Nev. ...... a/7,657,000

Diversions and Return Flows at and below Imperial Dam 

Yuma Main Canal below Colorado River Siphon at 

Yuma, Ariz. ................................... a/281,300

Gunnison River basin 

Gunnison River nr. Grand Junction, Colo. .......... a/929,100

Green River basin 

Green Rive.r at Green River, Utah .................. a/3,799,000

San Juan River basin 

San Juan River nr. Blanco, N. Mex. ............... 331,400

Mttle Colorado River basin 

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

Virgin River basin 

Virgin River at Littlefield, Ariz. .................. 99,930

GUa River basin 

Gila River at Kelvin, Ariz. ........................ a/64,820

Gila River below Gillespie Dam, Ariz. ............. a/139,600

Salt River at Stewart Mountain Dam, Ariz. .......... a/345', 800

Verde Rivor bolow Bartlett Dam, Ariz. ............. a/ 162,700

Outflow from Lake Pleasant, Ariz. ................. 453

Sevier Lake basin

Sevier River nr. Lynndyl, Utah .................... a/98,110

San Joaquin River basin

San Joaquin River mam stem 

San Joaquin River nr. Vernalis, Calif. ............. a/1,418,000

Calaveras River basin 

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

Mokelumne River basin

Mokelumne River at Woodbridge, Calif. ............ a/268,600

Sacramento River main stem 

Sacramento River at Knights Landing, Calif. ......... a/3,500,000

Feather River basin 

Feather River at Nicolaus, Calif. .................. a/2,535,000

American River basin 

American River at Fair Oaks, Calif. ............... a/1,445,000

Columbia River main stem 

Columbia River at Grand Coulee Dam, Wash. ....... a/79,440,000

Snake River main stem 

Snake River at King Hill, Idaho .................... a/4,446,000

Boise River basin 

Boise River at Notus, Idaho ....................... a/1,198,000

Columbia River main stem 

Columbia River at Maryhill Ferry nr. Rufus, Oreg. a/137,700 000

Willamette River basin

Willamette River at Salem, Oreg. .................. a/9,719,000

2.28

4.45

6.23

.33 

.99 

.79 

.92 

.90

.96

1.13

.61

.26

1.22

2.31

1.43

.43

2.38

.12

.21 

.14

a/For period of sampling only. See individual station records and footnotes for additional 

description of discharge data used in computations of weighted averages.
12 QUALITY FOR IRRIGATION, 1951

3 ranges for each of 5 classes. In addition he retained limits 

for chloride and sulfate.

Eaton (1942) suggested a classification consisting of three 

classes of sodium percentage, chloride, and sulfate. Plants were 

classified as sensitive or tolerant to boron. Total concentration 

was not included. Magistad and Chr 1stiansen( 1944) followed the 

pattern established earlier by Scofield, reducing the number of 

groupings for specific conductance, percent-sodium values, and 

boron to three classes each. Limits for chloride and sulfate were 

excluded.

Four years later, Wilcox (1948) established criteria following the early Scofield criteria of five classes based on specific 

conductance, percent-sodium values, and 15 classes for boron. 

Like Magistad and Christiansen, however, he deleted chloride 

and sulfate. Wilcox concurrently prepared an empirical diagram 

for plotting and evaluating individual water analyses and this technique has had wide application for appraising water quality under 

average conditions.

Although the above classifications have relied principally on 

specific conductance as the criterion for total salt concentrations, investigators generally place emphasis on the composition 

of the water, as indicated by the analysis of dissolved constituents in equivalents per million. For example, Eaton (1950) 

discusses precipitation of calcium and magnesium carbonate and 

its effects on the sodium percentage in the soil solution. Eaton's 

suggestion of''residual sodium carbonate" in irrigation waters 

as related to the base exchange of the soil has assumed added 

importance in soil permeability studies.

Thorne and Thorne (1951) in developing a system for classifying Utah waters designated categories by a series of two numbers: 1A, IB, 1C, IE, to increasing concentrations of dissolved 

solids and the letters to increasing proportions of sodium in the 

water or to different sodium percentages. In the number classification, Class 1 water in which specific conductance ranges 

fromO to 750micromhos, can be used safely on all soils. Class 

5 waters, those having specific conductance greater than 5,000 

micromhos, are generally unsuitable and should be used for irrigation only under special situations.

The United States Salinity Laboratory Staff (1954) recently 

released a classification that incorporates many of the desirable features of the early classifications together with more recent developments. Empirical equations are used in developing 

a diagram for the classification of irrigation waters. Although 

the classification embodies both research and fie Id observations, 

it is tentative and should be used for general guidance only.
CRITERIA OF WATER QUALITY 13 

A. Salinity hazard.

Waters are divided into four classes: low salinity, medium salinity, high salinity, and very high salinity, the dividing 

points between classes being 250, 750, and2,250 micromhos per 

centimeter. They range from water that can be used'for irrigation of most crops on most soils to that which is not suitable for 

irrigation under ordinary conditions.

B. Sodium hazard.

The Salinity Laboratory introduces the term sodium-adsorption ratio (SAR), which is the relative proportion of sodium 

to other cations in an irrigation water and is defined by the equation:

SAR= Na+

fCa++ + Mg++ 

2

where the concentration of the constituents is expressed in milliequivalents per liter (or equivalents per million for most irrigation waters). It is reported that the sodium-adsorption ratio 

is more significant for interpreting water quality than percent 

sodium because it relates more directly to the adsorption of sodium by the soil.

Waters are divided into four classes with respect to sodium 

hazard, the dividing points being at SAR values of 10, 18, and 26. 

They range from low-sodium water that can be used for irrigation 

on almost all soils to very high sodium water which is generally 

unsatisfactory for irrigation.

C. Boron hazard.

In assessing water quality on the basis of boron only, 

the classification uses the limits proposed by Scofield (1936). 

This grouping involves the ranges for sensitive, semitolerant, 

and tolerant crops, with respect to boron, for each of five classes.

D. Bicarbonate ion hazard.

The effect of bicarbonate ion concentration on water quality is expressed in terms of "residual sodium carbonate" (RSC) 

which is defined by the equation:

RSC= (HC03 - + C03 =) - (Ca++ + Mg++)

In appraising quality of irrigation water with the above classification, the Salinity Laboratory Staff recommends that first
14 QUALITY FOR IRRIGATION, 1951

consideration be given to salinity and alkali hazards, then to independent characteristics, boron or toxic elements, any one of 

which may change the quality rating. Other factors such as drainage and management practices likewise must be considered in the 

use of water having a given rating.

SELECTED REFERENCES

Eaton, F. M., 1935, Boron in soils and irrigation waters and its 

effect on plants: U. S. Dept. Agriculture Tech. Bull. 448, 

p. 1-133.

 1942, Toxicity and accumulation of chloride and sulfate 

salts in plants: Jour. Agriculture Res. 64, p. 357-399.

1950, Significance of carbonates in irrigation water: Soil

Science v. 69, p. 123-133. 

Federal Interagency River Basin Committee, 1950, Minutes of

the fifty-sixth meeting, Subcommittee on Hydrology (mimeographed). 

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

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

707, p. 8-9. 

President's Water Resources Policy Commission, 1950, A water

policy for the American people: v. 1: General Report, p.

152-153. 

Scofield, C. S., and Headley, F. B., 1921, Quality of irrigation

water in relation to land reclamation: Jour. Agriculture Res.

21, p. 265-278. 

Scofield, C. S., 1936, The salinity of irrigation water: Smithsonian Institution Ann. Rpt., 1935, p. 275-287. 

 1949, Trends of irrigation development in the United States;

Symposium, Am. Chem. Soc., p. 1-11 (mimeographed). 

Straus, Michael, 1952, Use of water for irrigation: Interior and

Insular Affairs Committee, U. S. House of Representatives;

v. 2, The physical basis of water supply and its principal uses. 

Thorne, J. P., and Thorne, D. W., 1951, Irrigation waters of

Utah: Utah Agriculture Expt. Sta. Bull. 349. 

U. S. Salinity Laboratory Staff, 1954, Diagnosis and improvement

of saline and alkali soils: U. S. Dept. Agriculture Handbook

60, p. 1-160. 

Wilcox, L. V., 1948, The quality of water for irrigation use:

U. S. Dept. Agriculture Tech. Bull. 962, p. 1-40.
Part 5. HUDSON BAY AND UPPER MISSISSIPPI RIVER BA

RED RIVER OF THE NORTH BASIN 

SHEYENNE RIVER NEAR WARWICK, N. DAK.

LOCATION. At gaging station at bridge on county road, 3.3 miles south of Warwick, Benson 

DRAINAGE AREA.--2,100 square miles.

RECORDS AVAILABLE. Chemical analyses: January to September 1951.

Water temperatures: January to September 1951. 

EXTREMES, January to September, 1951. Specific conductance: Maximum, i.,140 micromhos Jun

Percent sodium: Maximum, 53 July 15 to Aug. 13; minimum, 28 Mar. 1-26.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specifi

regional office at Lincoln, Nebr. Records of discharge for water year October i.950 to 

1208.

Chemical analyses, January to September 1951

Date of collection

Mar. 1-26 -

Mar. 27 

Mar. 28 

Mar 29 _ - _ -

Apr. 7-10 

Apr. 11-12 

Apr. 13-17 -

Apr. 18-May 16 

July 15-Aug. 13 

Aug. 14-31 

Qant 1 3H

Total or - 

weighted average b--

Runoff 

(acrefeet)

512 

371 

432 

a 60 

a 127 

190

3,540 

7,090 

4,740 

5,750 

9,600

3,850 

2,880 

383 

111 

688

40, 140

Silica

(sicg

ppm

28 

28 

28 

34

12

16 

14 

13 

14 

20

25 

21 

17 

21 

15

18

Equivalents per million

Calcium

(Ca)

3.89 

3.94 

3.89 

4.34 

4.14 

1.05

1.'60 

1.25 

1.20 

1.40 

2.20

3.04 

2.64 

2.45 

2.40 

2.15

1.90

Magnesium 

(Mg)

2.87 

2.66 

2.59 

2.88 

3.10 

.67

1.16 

.79 

.84 

.96 

2.00

2.78 

2.90 

2.67 

2.00 

2.23

1.56

Sodium

(Na)

2.96 

2.91 

2.61 

3.35 

3.57 

.83

1.30 

1.22 

1.83 

1.91 

3.57

4.61 

6.00 

5.91 

3.48 

4.78

2.78

Potassium 

(K)

0.15 

.13 

.13 

.16

.06

.21 

.18 

.18 

.19 

.21

.20 

.21 

.20 

.14 

.20

0. 19

Bicarbonate 

(HCO3)

7.37 

7.08 

6.88. 

8.01 

3.87 

1.80

2.75 

1.98 

2.46 

2.72 

4.83

7.11 

7.37 

7.46 

5.80 

6.72

4.10

Sulfate 

(S04)

1.83 

2.08 

1.60 

2.33 

2.56 

.65

1.21 

1.17 

1.39 

1.48 

2.62

3.00 

3.58 

3.21 

1.94 

2.29

2.00

Chloride

(Cl)

0.45 

.39 

.37 

.26

.14

.25 

.14 

. 14 

.17 

.37

.45 

.51 

.48 

.31 

.45

0.28

Fluoride 

(F)

0.01 

.01 

.01

.00

.01 

.01 

.01 

.01 

.02

.02 

.02 

.02 

.01 

.01

0.01

Nitrate 

(N03)

0.05 

.04 

.05 

.05

.06

.07 

.06 

.07 

.06 

.04

.04 

.03 

.03 

.03 

.03

0.05

a Not included in total. b For period sampled only.
Part 6. MISSOURI RIVER BASIN

MISSOURI RIVER MAIN STEM 

MISSOURI RIVER NEAR WILLISTON, N. DAK.

LOCATION. At gaging station at Lewis and Clark Highway bridge, 7 miles west of Wllliston, 

from the Yellowstone River. 

DRAINAGE AREA. 164,500 square miles. 

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

Water temperatures: October 1950, May to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 864 mlcromhos Mar. 20; minimum, 320 mi

Percent sodium: Maximum, 39 Apr. 8, May 1-31; minimum, 33 Feb. 1-28.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specifi

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 to S

Chemical analyses, December 1950 to September 1951

Date of collection

Dec* 5, 1950, Sta. 120 

Dec. 5, Sta. 220 

Ron *_ Qta t\(\(\

Dec. 6-31 

Jan. 1-31, 1951 

Jan. 3, Sta. 140 d - 

Jan. 3, Sta. 200 d - 

Jan. 3, Sta. 300 d 

Jan. 3, Sta. 950 d -

Feb. 1-28 

Mar. 1-21 -

Mar. 2, Sta. 120 d - 

Mar. 2, Sta. 200d - 

Mar. 2, Sta. 550 d 

mjf__ on nr7

Mar 9R-31 _______

Runoff 

(acrefeet)

24, 990 

b 24, 990 

b 24, 990 

701,000

788, 800 

29, 550 

29,550 

29, 550 

29,550

739, 200 

443, 300 

24, 000 

24, 000 

24, 000 

236, 400 

9RQ finn

Silica 

(SiOa ) 

ppm

17 

14 

17 

17

14

14 

15

13 

m

Equivalents per million

Calcium 

(Ca)

3.34 

3.19 

3.14 

3.24

3.29

3.09 

3.19

2.94 

9 nn

Magnesium 

(Mg)

2.10 

2.07 

1.98 

1.94

1.97

1.89 

2.17

1.46

1 19

Sodium

(Na)

3.04 

2.87 

2.91 

2.65

2.70

2.52 

2.87

. 2.30

1 ft*

Potassium 

(K)

0.09 

.10 

.10 

.08

.09

.09 

.08

.10 

in

Bicarbonate 

(HC03)

3.54 

3.44 

c3.43 

3.41

3.43

3.33 

3.28

2.65 

9 9n

Sulfate 

(S04)

4.73 

4.54 

4.35 

4.33

4.33

4.10 

4.73

3.91

9 <»<»

Chloride

(Cl)

0.31 

.34 

.31 

.31

.31

.28 

.34

.28 

11

Fluoride 

(F)

0.03 

.04 

.04 

.03

.03

.03 

.03

.02 

m

Nitrate 

(NO,)

0.03 

.03 

.02 

.03

.03

.03 

.04

.07 

n*

a Mean for cross section. 

bNot included in total.

c Includes 0.20 equivalents per 

dNot included in total or weigh
Apr. 1-7 ----- 

Apr. 8, Sta. 1,000 

Apr. 9-30 

Apr. 26, Sta. 710 d -

Apr. 28, Sta. 880 d 

Apr. 26, Sta. 890 d 

Apr. 26, Sta. 978 d 

May 1-31 

June 1-30 

June 7, Sta. 860 d 

June 7, Sta. 890 d -

June 7, Sta. l.OOOd 

July 1-31 

Aug. 1-31 

Sept. 3, Sta. l,015d 

Total or 

weighted average e 

AAQ oftft

109, 100

1, 246, 000 

44, 430

44, 430

44,430

44, 430

1

Q4Q ftAA

2

AA9 nnn

80,530

80,530

80,530

80,530

2

ncq nnn

2

O1O fW\A

2,070,000

74 «fln

rjA 4pn

74 *p.n

74 *p.n

15,760,000

10

11

19

15

15

15

13

14

2 

in

2.15 

2 An

2 

in

1.65

i on

2

4C

2 ft4

2.40

1.13 

1.56

1 99

flQ

QO

1

44

1 49

1.32

1 Q1

2.13

2

4 a

2

4n

1.43

1.61

2

f\A

2

4Q

2.09

no

.12 

.10

.08

.05

.06

no

no

0.08

2 9n

2.43

2 7Q

2 

CO

1.97

2

14

2

OQ

2.61

3.10

2.91

3

O4

2 

Oft

2 

no

2

(\a

2 QA

3

KA

3.04

AC

.17

O4

91

.14

.16

O4

AC

0.22

nn

.03 

n9

no

no

n9

.03

.03

0.03

.04

.06 

.03

.04

.03

.02

.02

no

0.03

dNot included in total or weighted average. eFor period sampled only.
MISSOURI RIVER MAIN STEM Continued 

MISSOURI RIVER AT PIERRE, S. DAK.

LOCATION. At bridge on U. S. Highway 14 at Pierre, Hughes County, 1J miles upstream from 

DRAINAGE AREA. 243,500 square miles.

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

Water temperatures: May to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 975 micromhos Mar. 28; minimum, 394 m

Percent sodium: Maximum, 41 Apr. 23, May 8, Sept. 13; minimum, 31 Apr. 8.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specif

nitrogen cycle determinations available in regional office at Lincoln, Nebr. Records 

September 1951 given in Water-Supply Paper 1209.

Chemical analyses, water year October 1950 to September 

Date of collection

Oct. 3, 1950, Sta.

600a 

Oct. 3, Sta. 950 a 

Oct. 3, Sta. 1,200 a -

Oct. 3, Sta. 1,350 a -

Nov. 3, Sta. 600 a 

Nov. 3, Sta. 900 a 

Nov. 3, Sta. l,200aNov. 3, Sta. l,350aJan. 8, 1951, Sta. 1/8

Jan. 8, Sta. 3/8 

Jan. 8, Sta. 5/8 

Jan. 8, Sta. 7/8 

Jan. 9-31 

Runoff

(acrefeet)

co 7cn

OOj f uU

53,750

53,750

53,750

70, 210

70, 210

70, 210

70, 210

34,310

n tii ^in U Of, OXU

c 34, 3 10

c 34, 310

638, 500

Silica

(SiO,)

ppm

11

11

11

12

8.9

11

9.2

9.0

11

11

10

7

Q

. o 

13

Equivalents per million

Calcium

(Ca)

3 (\A . w« 

3.04

3.04

3.04

2.79

2.79

2.79

2.79

3.24

3

QQ . A0

3

<IA

. £n

3

QQ . t*a

2.89

Magnesium

(Mg)

1.55

1.55

1.62

1.66

1.78

1.78

1.78

1.80

2.00

I

on

. O I 

219. i." 

2f\7

. V I

2.47

Sodium

(Na)

2 Q1 . «f 1

2.96

2.91

3.00

2.52

2.48

2.52

2.48

2.78

2

QO

. oo

2 Q1 . «f 1.

2

07

.Of

2.87

Potassium

(K)

0 12

.12

.11

.13

.10

.10

.09

.11

.11

no . u»j

no . u»j 

.10

.10

Bicarbonate

(HCO,)

2

Qc

. if 3

2.95"

2.95

2.95

3.02

3.00

2.98

3.02

3.47

3

47 . Tt ' 

3 An . 4i

3 R1 . 31.

3.57

Sulfate

(S04)

4 21

4.25

4.37

4.46

3.68

3.66

3.81

3.77

4.37

4 27

4 ^7 .Of 

4KA

. «n

4.43

Chloride

(CD

O OQ , ^O

.34

.31

.31

.25

.25

.25

.25

.31

 n

.ox

 n

 ox 

34 . o^t 

.31

Fluoride

(F)

0.03

.03

.03

.03

.03

.03

.03

.03

.03

M .

. uo 

(\1 . uo 

(\1 . uo 

.01

Nitrate

(NO,)

0.04

.03

.03

.03

.01

.01

.02

.02

.03

.03

n9 . U£

.02

a Not included in total or weighted average, 

b Mean for cross section, 

c Not included in total.
Feb. 1-9 

Feb. 10-28 -

Feb. 15, Sta. L 140 a 

Feb. 15, Sta. L 260 a 

Feb. 15, Sta. R 130 a 

Feb. 15, Sta. R 330 a

Mar. 6-9 - 

Mar. 14a - - -

Mar. 14-16i .....

Mar. 27-Apr. 3 

Apr. 4-5 ----- -

Apr. 6 

Apr. 8 

Apr. 9 -

Apr. 10-11 

Apr. 23, Sta. 500 a 

Apr. 23, Sta. 820 a 

Apr. 23, Sta. l,200aApr. 23, Sta. l,350aj£ay i_3i _

MayB, Sta. 450 a 

May 8, Sta. 895 a 

MayB, Sta. 1,075 a 

MayB, Sta. 1, 330 a 

July 1-23 

July 9, Sta. 440 a 

July 9, Sta. 750 a -----

July 9, Sta. 1,000 a 

July 9, Sta. l,315a 

July29-Aug. 31 

Aug. 8, Sta. 410 a 

Aug. 8, Sta. 710 a - 

Aug. 8, Sta. 965 a 

Aug. 8, Sta. 1, 300 a 

242,600 

465,500 

23, 210 

23, 210 

23,210 

23, 210

96, 990 

137, 900 

28, 980 

82, 310 

63, 870

522, 800 

284, 600 

216, 200 

210, 200 

168, "800 

409, 800

804, 100 

63, 470 

63, 470 

63, 470 

63, 470

1,794,000 

58, 710 

58, 710 

58, 710 

58, 710

2,682,000 

1,661,000 

66,640 

66,640 

68, 640 

66, 640

2,435,000 

68, 430 

68, 430 

68, 430 

68, 430

15

13

12

17

18

10

13

12

14

11

12

13

13

10

12

7.3

13

9.8

17

15

13

14

12

3.44

3.34

3.49

3.39

3.24

2.8»

2.94

3.09

3.39

2.69

2.45

2.30

2.15

2.20

2.40

2.20

2.45

2.54

2.15

1.85

1.80

2.10

1.80

1.84

1.94

1.89

1.89

1.89

1.85

1.86

1.95

1.59

1.23

1.05

1.07

.82

.92

1.34

1.20

1.53

1.62

1.05

.95

.88

1.10

.98

2.83

2.74

2.83

3.17

2.78

2.65

2.74

2.78

2.96

2.09

1.83

1.57

1.57

1.52

2.39

2.39

2.78

3.00

2.04

1.65

1.87

2.00

1.61

.09

.09

.09

.10'

.10

.09

.09

.09

.12

.09

.07

.09

.09

.07

.09

.08

.11

.13

.11

.08

-.11

.09

.09

3.54

3.51

3.57

3.61

3.38

3.15

3.21

3.28

3.05

2.87

2.90

2.85

2.75

2.69

2.84

2.56

2.95

3.15

2.62

2.23

2.02

2.34

1.93

4.50

4.27

4.54

4.62

4.25

4.00

3.91

4.18

4.50

2.91

2.17

1.89

1.83

1.79

3.08

3.02

3.56

4.04

2.60

2.14

2.42

2.81

2.46

.34

.34

.31

.34

.31

.28

.31

.31

.28

.20

.13

.11 .

.14

.11

.21

.23

.24

.25

.17

.14

.16

.18

.16

.01

.01

.03

.03

.03

.03

.03

.03

.02

.02

.02

.02

.01

.02

.02

.03

.02

.02

.03

.02

.02

.02

.03

.02

.03

.04

.04

.03

.04

.03

.04

.05

.06

.08

.08

.05

-.04

.03

.02

.02

.04

.03

.03

.03

.03

a Not Included In total or weighted average.
MISSOURI RIVER MAIN STEM Continued

MISSOURI RIVER AT PIERRE, S. DAK.--Contin

Chemical analyses, water year October 1950 to September 19

Date of collection

Sept. 1-30, 1951 

Sept. 13, Sta. 410 a 

Sept. 13, Sta. 585a 

Sept. 13, Sta. l,385aTotal or

weighted average d -

Runoff

(acrefeet)

9 OQQ ruin

76,560

76, 560

15,230)000

Silica

(SiOa) 

ppm

11

12

14

Equivalents per million

Calcium

(Ca)

2.50

2.40

Magnesium

(Mg)

1.46

1.32

Sodium

(Na)

2.78

2.30

Potassium

(K)

0.10

.12

0.10

Bicarbonate

(HC03)'

2.75

2.74

Sulfate

(S0«)

3.79

3.10

Chloride

(Cl)

.21

0.21

Fluoride

(F)

0.03

.01

0.02

Ni

tra

(N

0.03

.04

0^03

a Not included in total or weighted average. d For period sampled only.

MISSOURI RIVER MAIN STEM Continued 

MISSOURI RIVER AT NEBRASKA CITY, NEBR.

LOCATION. At gaging station at Waubonsie Highway Bridge at Nebraska City, Otoe County.

DRAINAGE AREA. 414,400 square miles.

RECORDS AVAILABLE. Chemical analyses: January to September 1951.

Water temperatures: May to September 1951. 

EXTREMES, 1951. Specific conductance: Maximum, 870 micromhos Jan. 7, Feb. 8; minimum, 

Percent sodium: Maximum, 34 Jan. 4-31, June 9-19; minimum, 18 Mar. 27-29.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of spec

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 

1210.
Chemical analyses, January to September 1951

Date of collection

Jan.4,1951,Sta. 175 aJan. 4, Sta. 225 a 

Jan. 4, Sta. 300 a 

Jan. 4, Sta. 375 a 

Jan. 4, Sta. 600 a 

Jan. 4-31 

Feb. 1-28 -

Mar. 1-24 

Mar. 25-26 

Ua-. 97_,OQ

Mar. 30-Apr. 17 

Apr. 18-20 

A %« O1 OQ

Apr. 30-May3 

MOD A 1\

Aug. 1-31 

Total or 

weighted average b

Runoff 

(acrefeet)

42,450 

42,450 

42,450 

42,450 

42,450 

1,152,000

1, 191, 000 

1, 356, 000 

242, 800 

837, 000 

4, 453, 000

542,100 

L, 148, 000 

720, 000 

3,357,000 

529, 600 

630, 000

554,600 

1, 787, 000 

564,500 

901, 300 

4,728,000 

3,890,000 

3,760, 000

32,340,000

Silica 

(SiO.) 

ppm

22

21 

21 

18 

13 

13

13 

15 

16 

19 

14 

16

17 

17 

15 

15 

19 

17 

16

17

Equivalents per million ""

Calcium 

(Ca)

3.34

3.29 

3.04 

2.69 

2.74 

2.45

2.79 

2.89 

3.24 

3.19 

2.89 

2.79

3.04 

2.64 

2.59 

2.84 

2.84 

2.54 

2.79

2.84

Magnesium 

(Mg)

2.10

1.83 

1.60 

1.15 

.94 

1.23

1.25 

1.23 

1.24 

1.49 

.99 

1.07

1.34 

1.20 

1.05 

1.14 

1.16 

1.06 

1.35

1.32

Sodium 

(Na)

2.91

2.61 

2.22 

1.30 

.87 

1.48

1.70 

1.74 

1.22 

2.09 

1.22 

1.57

1.83 

2.09 

1.30 

1.61 

1.74 

1.57 

2.04

1.83

Potassium 

(K)

0.15

.13 

.14 

.16 

.16 

.13

.12 

.14 

.16 

.16 

.16 

.16

.16 

.16 

.15 

.16 

.15 

.14 

.14

0.15

Bicarbonate 

(HCO,)

3.74

3.61 

3.31 

2.98 

2.98 

2.69

3.08 

3.15 

3.67 

3.41 

3.16 

2.98

3.08 

2.95 

2.92 

2.85 

3.10 

2.75 

3.05

3.06

Sulfate 

(SO,)

3.96

3.44 

3.14 

1.83 

1.42 

2.08

2.48 

2.46 

1.85 

3.08 

1.58 

2.21

2.91 

2.66 

1.83 

2.56 

2.39 

2.21 

2.77

2.54

Chloride 

(CD

0.68

.68 

.56 

.31 

.20 

.25

.27 

.37 

.27 

.37 

.31 

.28

.34 

.31 

.25 

.31 

i .34 

.34 

.34

0.37

Fluoride 

(F)

0,03

.03 

.02 

.01 

.01 

.02

.02 

.02 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02 

.03

0.02

Nitrate 

(NO,)

0.06

.06 

.07 

.09 

.10 

.09

.09 

.09 

.06 

.09 

.05 

.U

.10 

.09 

.11 

.10 

.09 

.08 

.06

0.08

B

a Not included in total or weighted average, 

b For period sampled only.
YELLOWSTONE RIVER BASIN

YELLOWSTONE RIVER AT BILLINGS, MONT.

.LOCATION. At gaging station at bridge on D. S. Highway 87, 1 mile northeast of Billings, Y

from Pryor Creek. 

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

Water temperatures: December 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 1,210 micromhos Feb. 2; minimum, 140 mi

Percent sodium: Maximum, 37 Dec. 1; minimum, 16 May 20.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specific 

phenolic material determinations available in regional office at Lincoln, Nebr. Records 

September 1951 given in Water-Supply Paper 1209.

Chemical analyses, water year October 1950 to Septemb

Date of collection

Oct. 11, 1950 a 

Nov. 3 a 

Dec. 15-31 

Jan. 1-30, 1951 

Feb. 2 a 

Mot* 1 91

Mar 7 a -

Un*. 99 9Q

Mar. 24-31 

Apr. 1-30 

Runoff 

(acrefeet)

10,550 

10, 430 

8,910 

131,400

167, 300 

5,450 

201, 900 

5,950 

106,400 

2,780

28,900 

95,390 

272, 200 

9,360

Silica 

(SiO,) 

ppm

12 

12 

5.6 

15

16 

13 

15 

20 

17 

16

15 

15 

14 

12

Equivalents per million

Calcium 

(Ca)

1.75 

1.70 

.70 

1.95

2.34 

2.10 

2.54 

5.34 

2.25 

2.79

1.95 

2.15 

1.85 

1.95

Magnesium 

(Mg)

1.07 

1.04 

.34 

1.07

.96 

1.10 

1.12 

4.18 

1.17 

1.21

.93 

.87 

.91 

.85

Sodium 

(Na)

1.1 

1.1 

.6 

1.13

1.30 

1.4 

1.43 

3.7 

1.35 

1.8

1.17 

1.04 

1.00 

1.2

Potassium 

(K)

3 

2 

1 

0.06

.08 

5 

.09 

) 

.07 

4

.06 

.09 

.06

}

Bicarbonate 

(HCO,)

2.29 

2.21 

.82 

2.44

2.65 

2.64 

2.72

5.28 

2.59 

3.02

2.44 

2.64 

2.38 

2.39

Sulfate 

(S04)

1.37 

1.44 

.65 

1.67

1.81 

1.77 

2.23 

7.97 

2.02 

2.48

1.58 

1.31 

1.31 

1.42

Chloride 

<C1)

0.25 

.18 

.09 

.20

.25 

.20 

.21 

.03 

.25 

.28

.21 

.18 

.20 

.21

Fluoride 

(F)

0.03 

.02 

.06 

.02

.02 

.02

.02 

.03

.02 

.03

.02 

.00 

.01 

.02

Nitrate 

(NO,)

0.01 

.01 

.03 

.03

.03 

.02 

.05 

.00 

.05 

.03

.02 

.07 

.02 

.04

B

a Not included in total or weighted average.
May 1-8 

May 20 

May 21-22 - 

May 23 

June 17-19 

June 20-24 -

July 1-4 

July 5 

July 22 - 

July 23-Aug. 11 

Aug. 12-25 

Aug. 27-31 

Total or 

weighted average b

104, 200 

253,100 

22, 810 

38,080 

71,010 

34, 510

505,000 

302, 100 

168,000 

216,400 

68, 630 

256,500 

213,800

145, 400 

45, 220 

631, 100 

37,880 

40, 070 

527, 200

245, 300 

20, 830 

14, 540 

67,700 

318, 100 

9,820

5,201,000

16 

16 

14 

18 

16 

15

14 

13 

12 

11 

11 

12 

13

12 

11 

13 

9.8 

16 

13

14 

12 

IS 

14 

13 

11

14

1.75 

1.35 

1.20 

1.50 

1.05 

1.05

1.05 

1.50 

.90 

.90 

.80 

.80 

.95

.80 

1.05 

.85 

.85 

.80 

.95

1.35 

1.45 

2.10 

1.55 

1.75 

1.75

1.30

.79 

.43 

.42 

.39 

.27 

.35

.25 

.06 

.36 

.24 

.26 

.30 

.27

.42 

.15 

.37 

.39 

.44 

.53

.69 

.65 

.06 

.69 

.87 

.99

0.53

.87 

.48 

.6 

.37 

.35 

.33

.32 

.52 

.38 

.29 

.4 

.35 

.43

.43 

.39 

.48 

.4S 

.48 

.61

.87 

.86 

.91 

1.00 

1.13 

1.37

(165

.06 

.05

.06 

.04

.03 

.04 

.05 

.04

.03 

.04

.04 

.04 

.04

.04 

.05

.06

.07 

.06 

.07

0.05

2.20 

1.67 

1.44 

1.93 

1.29 

1.41

1.18 

1.41 

1.21 

1.08 

1.05 

1.05 

1.15

1.18 

1.18 

1.20- 

1.18 

1.28 

1.43

1.87 

1.92 

2.00 

2.03 

2.23 

2.72

1.64

1.17 

.56 

.65 

.33 

.40 

.33

.42 

.63 

.42 

.33 

.37 

.37 

.46

.40 

.37 

.40 

.44 

.42 

.60

.92 

.90 

1.02 

1.08 

1.33 

1.19

0.79

.16 

.11 

.13 

.03 

.03 

.03

.07 

.10 

.08 

.07 

.06 

.08 

.08

.08 

.06 

.08 

.08 

.08 

.11

.16 

.11 

.14 

.17 

.18 

.17

0.12

.02 

.02 

.02 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01 

.01

.02 

.01 

.02 

.01 

.01 

.03

.02 

.01 

.02 

.02 

.02 

.02

0.02

.04 

.03 

.05 

.05 

.03 

.03

.03 

.03 

.03 

.03 

.02 

.02 

.02

.01 

.03 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.01

0.03

a Mot included in total or weighted average, 

b For period sampled only.
YELLOWSTONE RIVER BASIN Continued 

YELLOWSTONE RIVER NEAR SIDNEY, MONT.

LOCATION. At gaging station at highway bridge 2 miles south of Sidney, Richland County, and 

DRAINAGE AREA. 69,450 square miles.

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

Water temperatures: January to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 2,780 micromhos Jan. 14; minimum, 288 mi

Percent sodium: Maximum, 39 Aug. 1-31; minimum, 28 June 17-25.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specific 

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 to Se

1209.

Chemical analyses, water year October 1950 to September 1951

Date of collection

Oct. 4, 1950 a 

Jan. 3-31, 1951 

Feb. 1-10 

Feb. 11-28 

Mar. 1-24 

Mar. 25-28 

Apr. 7-30 

lUfoTT 1 91 .

May 22-31 

June 1-9 

July 3-31 

Aug. 1-31 

Sept. 1-30 

Total or 

weighted average b

Runoff 

(acrefeet)

22,020 

14, 8.80 

292, 200 

49, 980 

286,000

287, 600 

130, 900 

427, 400 

451, 800

550, 600 

538, 300 

677, 600 

314,000 

721, 800 

418, 100

1,554,000 

955, 400 

589,000

8,245,000

Silica 

(SiOa ) 

ppm

14 

14 

17 

18 

13

15 

9.0 

11 

14

14 

14 

17 

16 

14 

15

14 

14 

14

14

Equivalents per million

Calcium 

(Ca)

3.09 

3.94 

4.64 

4.79 

3.54

4.04 

1.65 

2.79 

3.04

2.35 

1.70 

1.90 

2.10 

1.65 

1.65

1.65 

2.20 

3.24

2.35

Magnesium 

(Mg)

1.53 

2.44 

2.04 

2.41 

1.86

2.28 

1.43 

1.71 

1.92

1.41 

.76 

.66 

.68 

.55 

.63

.65 

1.08 

1.78

1.15

Sodium 

(Na)

2.87 

3.61 

3.52 

3.78 

2.87

3.44 

1.48 

2.17 

2.78

2.09 

1.13 

. 1.30 

1.48 

.87 

1.04

1.30 

2.13 

3.13

1.87

Potassium 

(K)

0.08 

.12 

.12 

.12 

.15

.11 

.26 

.13 

.08

.07 

.05 

.06 

.05 

.05 

.05

.06 

.08 

.10

0.08

Bicarbonate 

(HCO,)

2.92 

3.82 

4.13 

4.46 

3.31

3.67 

2.65 

3.08 

3.10

2.51 

1.97 

2.08 

2.06 

1.80 

1.75

1.77 

2.43 

2.95

2.41

Sulfate 

(S04)

4.41 

5.83 

6.00 

6.35 

4.79

5.43 

1.96 

3.33 

4.27

3.04 

1.52 

1.79 

2.10 

1.27 

1.58

1.79 

2.85 

5.02

2.79

Chloride 

(Cl)

0.25 

.39 

.48 

.45 

.39

.42 

.17 

.25 

.34

.24 

.16 

.13 

.16 

.11 

.11

.13 

.21 

.31

0.21

Fluoride 

(F)

0.03 

.02 

.01 

.01 

.01

.03 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.01

.01 

.02 

.02

0.02

Nitrate 

(NO,)

0.03 

.05 

.06 

.07 

.08

.08 

.10 

.07 

.04

.03 

.04 

.05 

.04 

.04 

.04

.04 

.03 

.05

0.05

Bo

(

p

0

a Not included in total or weighted average. b For period sampled only.
YELLOWSTONE RIVER BASIN Continued

BIGHORN RIVER AT THERMOPOLIS, WYO.

LOCATION.--'At Broadway Street bridge at Thermopolis, Hot Springs County, upstream from pr

downstream from small tributary. Water discharge measurements made at this site. 

DRAINAGE AREA. 8,080 square miles.

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

Water temperatures: April 1947 to September 1951. 

Sediment records: March 1946 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 1,220 micromhos Sept. 8; minimum, 259 

Percent sodium: Maximum, 43 Aug. 15-31, Sept. 4; minimum, 21 May 30. 

EXTREMES, 1947-49, 50-51. Specific conductance: Maximum, 1,270 micromhos Apr. 26, 1947; 

Percent sodium: Maximum, 47 Aug. 1-31, Sept. 1-30, 1948; minimum, 13 May 21-30, 1947.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specif

phenolic material determinations available in regional office at Lincoln, Nebr. Recor

September 1951 given in Water-Supply Paper 1209.

Chemical analyses, water year October 1950 to September 

Date of collection

Oct. 4, 1950 a 

Jan. 1-27, 1951 

Feb. 6 a 

Mar. 1-31 

Apr. 1-30 

Runoff 

(acrefeet)

3,970 

3,590 

2,720 

2,120

42, 180 

1,520 

1,430 

56,150 

2,520

62, 510 

1,850 

69, 560 

1,940

Silica 

(SiOa) 

ppm

13 

10 

12

13 

12

11 

10

Calcium 

(Ca)

3.54 

2.79 

3.04 

3.39

3.79 

3.74 

3.54 

3.54 

3.19

3.44 

3.54 

3.29 

4.14

Magnesium 

(Mg)

1.14 

1.64 

1.78 

1.85

2.09 

1.94 

1.74 

1.70 

1.63

1.88 

1.66 

1.91 

1.76

Sodium

(Na)

Equivalents per million

Potassium 

(K)

2.91 

2.54 

2.65 

3.25

3.44 I 0.07 

3.51 

2.83 

2.83 1 .07 

2.91

3.09 1 

3.10 

3.04 1 

3.42

Bicarbonate 

(HCO,)

2.62 

2.65 

2.88 

3.02

3.44 

3.23 

3.44 

3.11 

2.98

2.95 

3.06 

2.98 

3.23

Sulfate 

(S0<)

4.33 

3.89 

4.21 

5.02

5.23 

5.48 

4.64 

4.39 

4.33

5.20 

4.79 

5.02 

5.56

Chloride 

(Cl)

0.34 

.39 

.34 

.39

.45 

.42 

.42 

.39 

.37

.39 

.39 

.34 

.45

Fluoride

(F)

0.01 

.02 

.02

.02 

.02

.02 

.02

.02 

.02

Nitrate 

(NO,)

0.04 

.03 

.02 

.04

.03 

.04 

.05 

.04 

.03

.05 

.04 

.05 

.06

a Not included in total or weighted average.
YELLOWSTONE RIVER BASIN Continued 

BIGHORN RIVER AT THERMOPOLIS, WYO. Continue

Chemical analyses, water year October 1950 to September 1951 

Date of collection

1 IWfav 1 1Q 1 Q>\1

June 3-17 

Aug. 1-14 - --

Aug. 15-31 

Sept. 1-30 

Total or 

weighted average b -

Runoff 

(acrefeet)

77, 140 

4,400 

47, 030 

74, 680 

20, 030 

21,620

38, 260 

162,700 

9,500 

82, 190 

42, 150

262, 700 

10, 120 

26, 320 

67, 700 

8,270

95,500 

46, 670 

73, 160 

2,920

1,370, 000

Silica 

(Si02) 

ppm

11

13

11 

12

11

--

Equivalents per million

Calcium

(Ca)

2.89 

3.49 

2.30 

1.55 

2.10 

1.90

1.55 

1.90 

2.10 

1.60 

1.60

1.65 

1.95 

2.05 

2.00 

2.50

2.20 

3.09 

3.69 

3.39

2.30

Magnesium 

(Mg)

1.43 

1.77 

1.04 

.65 

.62 

.66

.55 

.72 

.84 

.52 

.48

.67 

.59 

.71 

.76 

.86

.86 

1.49 

1.79 

1.57

0.99

Sodium

(Na)

2.48 

3.C 

1.70 

.74 

.74 

.83

.78 

1.09 

1.4 

.65 

.83

1.17 

1.2 

1.57 

1.48 

1.1

1.78 

3.52 

3.91 

3.8

1.78

Potassium 

(K)

10

4

2

2

1

--

Bicarbonate 

(HC03)

2.62 

2.88 

2.15 

1.69 

2.36 

2.20

1.74 

2.00 

2.16 

1.82 

1.67

1.59 

1.90 

1.92 

1.74 

2.16

1.97 

2.59 

2.95 

2.82

2.16

Sulfate

(S04 )

4.10 

4.98 

2.79 

1.17 

1.00 

1.10

1. 12 

1.73 

2.04 

1.02 

1.21

1.87 

1.69 

2.37 

2.44 

2.66

2.81 

5.14 

6.16 

5.50

2.83

Chloride

(CD

0.28 

.34 

.16 

.08 

.11 

.11

.08 

.13 

.14 

.07 

.08

.13 

.13 

.14 

.16 

.20

.21 

.39 

.42 

.39

0.21

Fluoride

(F)

0.02

.01

.02 

.03

.02

--

Nitrate 

(NO,)

0.05 

.04 

.06 

.03 

.03 

.03

.03 

.04 

.03 

.03 

.03

.02 

.02 

.04 

.03 

.03

.03 

.03 

.04 

.04

0.03

a Not included in total or weighted average, 

b For period sampled only.
YELLOWSTONE RIVER BASIN Continued 

BIGHORN RIVER AT BIGHORN, MONT.

LOCATION. At bridge on 0. S. Highway 10 and 12, three-quarters of a mile upstream from mo

County, and 3i miles downstream from gaging station near duster. 

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

Water temperatures: April 1949 to September 1951. 

Sediment records: July 1947 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 1,270 micromhos Feb. 2; minimum, 235 m

Percent sodium: Maximum, 43 Sept. 1-30; minimum 29 Feb. 11.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specifi

regional office at Lincoln, Nebr. No appreciable inflow between gaging station and sam

waste water. Chemical analyses 1946-48 published under Bighorn River near Custer, Mont

1950 to September 1951 given in Water-Supply Paper 1209.

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct. 3 a 

Jan. 5-8, 1951 

Jan. 23 

Voh 1 1

Feb. 14-15 

Mar. 7-15 

Mar. 16-17 

Mar. 18 

Runoff 

(acrefeet)

9,180 

9,080 

6,410 

17,450 

4,560 

8,530

47,010 

5,950 

10, 710 

70, 020

38, 080 

13,090 

5,950 

30,350 

22,810 

53,280

Silica 

(SiO,) 

ppm

13 

16 

17 

15 

17 

14

16 

8.4 

11 

12

13 

10 

19 

9.7 

12 

13

Equivalents per million

Calcium 

(Ca)

4.04 

4.74 

4.49 

5.24 

4.04 

4.59

5.79 

1.00 

4.34 

4.34

4.89 

3.64 

7.f 

3.19 

3.99 

4.29

Magnesium 

(Mg)

2.32 

1.94 

2.71 

2.72 

3.24 

2.01

2.85 

.52 

1.74 

1.94.

2.43 

1.72 

8 

2.05 

1.61 

2.35

Sodium 

(Na)

4.31 

4.35 

4.35 

4.61 

4.04 

3.43

4.48 

.70 

3.74 

3.52

3.87 

2.78 

4.48 

2.65 

3.17 

4.00

Potassium 

(K)

0.09 

.10 

.17 

.07 

.09 

.05

.12 

.19 

.07 

.07

.13 

.10 

.09 

.19 

.09 

.08

Bicarbonate 

(HC03)

3.21 

3.64 

4.00 

4.20 

3.93 

3.61

4.62 

'1.57 

3.44 

3.28

3.87 

2.85 

b4. 14 

2.72 

2.95 

3.51

Sulfate 

(S04)

6.97 

7.04 

7.66 

7.70 

5.83 

5.93

7.56 

.73 

5.83 

6.00

6.66 

5.00 

7.70 

5.10 

5.37 

6.52

Chloride 

(Cl)

0.39 

.39 

.42 

.48 

1.55 

.42

.54 

.03 

.42 

.40

.48 

.31 

.45 

.27 

.34 

.42

Fluoride 

(F)

0.01 

.01 

.01 

.02 

.02 

.02

.02 

.01 

.02 

.02

.02 

.02

.02 

.02 

.02

Nitrate 

.(N03)

0.05 

.06 

.04 

.07 

.06 

.06

.07 

.04 

.08 

.07

.06 

.06 

.07 

.06 

.06 

.05

a Not included in total or weighted average.

b includes 0.27 equivalents per million of carbonate (CO,).
YELLOWSTONE RIVER BASIN Continued 

BIGHORN RIVER AT BIGHORN, MONT.--Continued 

Chemical analyses, water year October 1950 to September 1951 Co

Date of collection

Apr. 7-22,1951 

May 25-29 

July 1-31 - 

Aug. 1-31 

Sept. 1-30 

Total or

weighted average c

Runoff

(acrefeet)

94 250

331 400

IAQ onn

d 1 onn

29 750

i 5°. °.ftn

581, 500

9QQ 9AA

1 Q Q 1 A A

2,721,000

Silica

(Si02 )

ppm

1 ft

1 ft

1 C

1Q

9A

19

17

1 c

1 ft

17

Equivalents per million

Calcium

(Ca)

3 04

2 AA

2 QA

2 m

2 9R

2.35

3 29

4 44

2.99

Magnesium

(Mg)

2.70

I

CC

1.10

I

ftQ

92

I

nq

1.09

1

C7

2

j ft

1.48

Sodium

(Na)

3 Qfi

3.00

1 91

I

rro

1.74

1.70

2.22

3 

CO

5 99

2.74

Potassium

(K)

0.09

AC

.05

AC

.05

.05

.06

AP.

no

0.07

Bicarbonate

(HCOS)

3

C1

2.77

2 

Oft

2.16

2 

CO

3

QQ

2.64

Sulfate

(S04)

4.46

2 ftQ

3.39

5

CA

8

0Q

4.37

Chloride

(Cl)

.20

.16

.14

1 ft

.18

9fl

0.26

Fluoride

(F)

0.03

(19

.02

.01

M

.02

.02

A9

0.02

Nitrate

(N03)

0.05 

.05

nc

.05

m

 nt

.05

ngt

.05

0.05

c For period sampled only.

YELLOWSTONE RIVER BASIN Continued 

TONGUE RIVER AT MILES CITY, MONT.

LOCATION. At gaging station 4 miles south of Miles City, Custer County, and 8 miles upst

RECORDS AVAILABLE. Chemical analyses: January to September 1951. 

Water temperatures: June 1950 to September 1951. 

Sediment records: June 1946 to September 1951. 

EXTREMES, 1951. Specific conductance: Maximum, 1,340 micromhos May 9; minimum, 338 micr

Percent sodium: Maximum, 42 Aug. 24 to Sept. 5; minimum, 19 June 8-11.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specif

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 to 

1209. '
Chemical analyses, January to September 1951

Date of collection

Jan. 4-31, 1951 

Mai* 1 1 *\

Mar. 16-Apr. 1 

Apr. 2-14 

May 1-8 

June 12-24 

Aug. 7-23 

Aug. 24-Sept. 5 

Sept. 6-30 

Total or 

weighted average d -

Runoff 

(acrefeet)

11,710 

12, 420 

6,290 

8,690 

10, 510 

3, 400

764 

2,200 

34, 440 

6,340 

8,760 

21,630

20, 740 

4,410 

20, 140 

18,050

190, 500

Silica 

(SiOa ) 

ppm

11 

17 

11 

9.0 

8.4 

8.4

8.4 

12 

13 

11 

11 

15

15 

14 

16 

12

13

Equivalents per million

Calcium 

(Ca)

4.34 

3.74 

3.19 

2.64 

2.94 

3.39

3.29 

3.64 

2.79 

1.80 

2.25 

2.05

2.15 

2.50 

2.20 

2.74

2.69

Magnesium 

(Mg)

4.30 

3.50 

2.69 

2.90 

3.04 

4.01

4.73 

4.02 

1.97 

1.16 

1.85 

1.55

1.73 

2.24 

1.40 

2.66

2.30

Sodium 

(Na)

2.70 

2.61 

2.35 

2.35 

2.30 

3.70

5.65 

4.30 

1.65 

.70 

1.39 

1.10

1.04 

2.22 

2.70 

1.91

1.91

Potassium 

(K)

0.11 

.12 

.12 

.11 

.11 

.13

.17 

.18 

.09 

.06 

.07 

.05

.06 

.09 

.10 

.10

0.09

Bicarbonate 

(HC03)

5.60 

4.72 

4.36 

a 3. 64 

b3.87 

4.92

5.42 

4.83 

3.33 

2.34 

3.00 

C2.86

2.92 

3.70 

3.54 

c3.81

3.62

Sulfate 

(SO,)

5.93 

4.89 

4.73 

4.12 

4.33 

6.14

8.33 

7.14 

3.12 

1.33 

2.33 

1.87

1.98 

3.16 

2.81 

3.44

3.33

Chloride 

(Cl)

0.14 

.13 

.13 

.08 

.10 

.17

.21 

.18 

.07 

.03 

.06 

.03

.04 

.07 

.01 

.07

0.07

Fluoride

(F)

0.01 

.01 

.01 

.02 

.03 

.03

.02 

.02 

.01 

.02 

.01 

.01

.01 

.02 

.02 

.01

0.02

Nitrate 

(NO,)

0.03 

.04 

.04 

.02 

.03 

.01

.02 

.03 

.04 

.04 

.02 

.02

.02 

.01 

.05 

.01

0.03

a Includes 0. 30 equivalents per million carbonate (CO3). 

b Includes 0.40 equivalents per million carbonate (CO3). 

. c Includes 0.17 equivalents per million carbonate (CO,). 

d For period sampled only.
YELLOWSTONE RIVER BASIN Continued 

POWDER RIVER NEAR LOCATE, MONT

LOCATION. At gaging station at bridge on U. S. Highway 12, 3 miles upstream from Locate C

Custer County, and 25 miles east of Miles City.

RECORDS AVAILABLE. Chemical analyses: December 1949 to September 1951. 

Water temperatures: March to September 1951. 

Sediment records: March 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 2,590 micromhos Aug. 16; minimum, 763 

Percent sodium: Maximum, 53 Aug. 25; minimum, 24 Aug. 16.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specifi

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 to 

1209.

Chemical analyses, water year October 1950 to September 

Date of collection

f\rt ^ 1Q(*ft a

Jan. 4-31, 1951 

F4kH 1 98

M ar* 1 01

mioy 9Q

Mar. 30-Apr. 4 

July 6-16 

July 17- - - 

Tlllv IR-Auor IS 

Runoff 

(acrefeet)

220 

335 

4,540 

6,600

6,590 

6,600 

7,300 

17, 560 

14, 000 

29, 390

6,160 

1,690 

8,250 

b 1,800 

585 

11 ian

Silica 

(SiOa) 

ppm

9.2 

12 

13 

12

13 

9.6 

12 

11 

11 

13

13 

12

17

21 

1R

Equivalents per million

Calcium

(Ca)

5.54 

7.49 

9.98 

8.18

6.79 

5.19 

5.19 

5.74 

7.24 

5.19

4.64 

6.49 

5.89 

6.64 

7.68 

5 04

Magnesium 

(Mg)

4.06 

4.47 

5.18 

4.78

5.13 

3.53 

3.37 

3.46 

5.24 

3.43

2.94 

4.37 

3.47 

4.08 

3.72 

3 1R

Sodium 

(Na)

6.70 

6.83 

7.83 

7.09

6.83 

5.09 

5.22 

5.26 

7.48 

5.31

5.44 

8.61 

4.61 

7.65 

6.61 

4 sn

Potassium 

(K)

0.15 

.14 

.17 

.15

.12 

.09 

.12 

.10 

.12 

.13

.12 

.18 

.15 

.18 

.20 

14

Bicarbonate 

(HCO3)

3.82 

4.15 

5.67 

4.88

3.29 

3.08 

3.11 

2.98 

3.87 

3.16

3.11 

3.61 

3.33 

4.43 

c3.51 

3 on

Sulfate 

(SO,)

12.60 

14.16 

16.34 

14.26

14.37 

9.64 

9.78 

10.31 

14.68 

10.16

9.26 

14.95 

10.37 

13.32 

14.16

<» 32

Chloride

(ci)

0.34 

1.07 

1.47 

1.18

1.38 

1.07 

.96 

1.16 

1.35 

.96

.79 

1.21 

.54 

.79 

.51 

49!

Fluoride

(F)

0.01 

.02 

.02 

.02

.02 

.02 

.03 

.02 

.02 

.04

.03 

.03 

.03

.03 

03

Nitrate 

(N03)

0.04 

.05 

.06 

.05

.07 

.05 

.09 

.07 

.05 

.08

.06 

.03 

.04 

.01 

.09 

OR

a Not included in total or weighted average.

b Not included in total.

c Includes 0.40 equivalents per million carbonate (CO,).
Aug. 16 

Aug. 17-24 

Aug. 25 

Aug. 26-Sept. 12 

Sept. 13-30 

weighted average d

8

n on

5,240 

31,800

10,710

177, 400

17

14

13

7.73

6.69

5.15

3.43

3.87

5.44

5.00 

4.74

5.74

. £U

.15 

.18

.17

0.15

. *so

. 4 I

3.06

. 6t

3.41

«O. JL1

16.97

12^60

<LO. yo

12.16

. 14

. 4O

.06 

.37

A, £1

0.85

.03

. uo

0.03

.13

.12

. u£

.03

.07

0.06

d For period sampled only.

GRAND RIVER BASIN 

GRAND RIVER NEAR WAKPALA, S. DAK.

LOCATION. At gaging station at bridge on U. S. Highway 12, 5 miles west of Wakpala, Cors

Creek, and 21 miles upstream from mouth. 

DRAINAGE AREA. 5,510 square miles.

RECORDS AVAILABLE. Chemical analyses: March to September 1951. 

EXTREMES, March to September, 1951. Specific conductance: Maximum, 1,920 micromhos May 2

Percent sodium: Maximum, 77 June 8; minimum, 41 Mar. 24-25. 

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specif

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 to 

1209.

Chemical analyses, March to September 1951

Date of collection

Mar. 24-25, 1951 

Mar. 26-30 

Mar. 31-Apr. 11 - 

Apr. 12-15 

Apr. 16-May24 

Runoff 

(acrefeet)

119 

51, 130 

9,100 

809 

4,770 

744

Silica 

(SiO,) 

ppm

10 

13 

9.7 

12 

12 

13

Equivalents per million

Calcium 

(Ca)

0.60 

1.30 

1.60 

2.50 

3.54 

3.24

Magnesium 

(Mg)

0.26 

.42 

.80 

1.30 

2.10 

2.48

Sodium 

(Na)

0.74 

1.78 

4.00 

6.17 

10.31 

10.91

Potassium 

(K)

0.22 

.09 

.13 

.15 

.20 

.23

Bicarbonate 

(HCO,)

0.97 

2.16 

2.97 

4.29 

6.05 

a 5. 10

Sulfate

(scg

0.75 

1.33 

3.29 

5.27 

9.37 

11.76

Chloride 

(Cl)

0.06 

.07 

.14 

.21 

.34 

.34

Fluoride

(F)

0.01 

.01 

.01 

.02

-, - 01 

.04

Nitrate 

(NO,)

0.04 

.04 

.04 

.03 

.02 

.03

a Includes 0.20 equivalents per million carbonate (CO,).
GRAND RIVER BASIN Continued 

GRAND RIVER NEAR WAKPALA, S. DAK. Continued 

Chemical analyses, March to September 1951--Continued

Date of collection

June 4, 1951 

July 11-28 

Aug. 30-Sept. 1 

Sept. 2-10 

Total or 

weighted average e

Runoff 

(acrefeet)

1,430 

1,720 

1,360 

4,030 

5,840 

3,150

6,160 

2,300 

3,020 

9,000 

7,450 

2,140

114,300

Silica 

(SiO,) 

ppm

18 

21 

22 

15 

13 

29

15 

16 

20 

20 

15 

15

15

Equivalents per million

Calcium 

(Ca)

3.04 

1.85 

1.25 

1.15 

1.35 

1.30

1.65 

3.04 

2.10 

1.50 

1.00 

2.25

1.55

Magnesium 

(Mg)

1.72 

.75 

.67 

.49 

.57 

.46

.77 

1.76 

.94 

.64 

.36 

.99'

0.66

Sodium

(Na)

12.00 

7.17 

7.00 

4.39 

4.44 

4.87

6.35 

10.09 

7.78 

4.83 

3.17 

6.39

3.96

Potassium 

(K)

0.25 

.18 

.17 

.12 

.13 

.14

.14 

.23 

.18 

.13 

.11 

.18

0.12

Bicarbonate 

(HCO,)

6.16 

b6.40 

4.49 

3.16 

3.33 

4.46

4.06 

c5.65 

d4.62 

3.41 

2.64 

4.46

3.13

Sulfate 

(S04)

10.26 

3.37 

4.29 

2.98 

3.12 

1.98

4.75 

9.74 

6.31 

3.44 

2.02 

5.50

3.04

Chloride

(ci)

0.39 

.17 

.17 

.06 

.08 

.14

.14 

.25 

.20 

.08 

.08 

.20

0.11

Fluoride

(F)

0.02 

.04 

.02 

.03 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02

0.02

Nitrate 

(NO,)

0.07 

.14 

.09 

.05 

.04 

.12

.07 

.06 

.03 

.03 

.03 

.02

0.04

b Includes 0.47 equivalents per million carbonate (CO,), 

c Includes 0.60 equivalents per million carbonate (CO,).

d Includes 0.33 equiv

e For period sampled 
CHEYENNE RIVER BASIN

CHEYENNE RIVER NEAR EAGLE BUTTE, S. DAK.

LOCATION.--At gaging-station at bridge on State Highway 63, half a mile upstream from Herm

Eagle Butte, Dewey County. 

DRAINAGE AREA. 24,500 square miles.

RECORDS AVAILABLE.--Chemical analyses: December 1950 to September 1951. 

EXTREMES, 1950-51.--Specific conductance: Maximum, 3,080 micromhos Feb. 1; minimum, 968 m

Percent sodium: Maximum, 55 June 25; minimum, 25 Mar. 1-19. 

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specifi

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 to 

1209.

Chemical analyses, December 1950 to September 1951

Date of collection

 Dec. 22, 1950 

Jan. 17-31, 1951 

ITnH i *>o

Vfoy. 1 1Q

Mar. 21, R. channel -- 

Mar. 21, L. channel --

M*a*» 99 94.

Mar. 26-27 - 

Mar. 28 

Mar. 29-31 

Apr. 1-9 

Apr. 10-May 10 

i a Mean for cross sect] 

b Not included in total.

Runoff 

(acrefeet)

169 

893 

2,310 

2,620 

218 

b218 

b218

1,030 

8,930 

12,890 

11,520 

9,270 

9,940

7,980 

8,750 

7,600 

2,980 

5,060 

4,680 

on.

Silica 

(Si02 ) 

ppm

15 

11 

11 

9.5 

11 

7.8 

7.8

8.7 

8.8 

16 

11 

13 

12

15 

24 

20 

16 

18 

26

Equivalents per million

Calcium 

(Ca)

10.98 

14.97 

13.87 

12.48 

9.13 

9.13 

12.38

10.98 

5.49 

5.74 

5.34 

7.44 

10.78

11.88 

6. 19 

8.78 

8.33 

7.83 

4.74

Magnesium 

(Mg)

10.02 

8.83 

7.09 

6.80 

10.07 

10.15 

6.82

5.50 

2. 55 

2.22 

2.02 

4.16 

6.74

7.72 

2.55 

4.02 

4.07 

3.37 

1.48

Sodium 

(Na)

9.13 

9.26 

9.00 

6.57 

7.87 

8.04 

7.26

6.57 

4.87 

5.09 

4.78 

6.83 

9.48

10.18 

8.44 

8.83 

7.70 

8.39 

7.87

Potassium 

(K)

0.31 

.25 

.25 

.25 

.24 

.22 

.23

.21 

.15 

.20 

. 17 

.22 

.28

.41 

.28 

.36 

.31 

.38 

.26

Bicarbonate 

(HC03 )

1.56 

5.01 

4.56 

4.26 

4.29 

4.26 

4.28

3.84 

2.25 

3.21 

2.20 

2.80 

3.10

2.65 

3.34 

2.93 

2.79 

3.38 

3.74

Sulfate 

(S0<)

26.23 

26.65 

23.94 

20.09 

21.03 

21.24 

20.72

17.70 

10.20 

8.81 

9.37 

14.84 

22.48

26.23 

13.64 

18.32 

17.18 

15. 51 

9.78

Chloride

(Cl)

1.44 

1.58 

1.47 

1.33 

1.44 

1.47 

1.52

1.33 

.28 

.54 

.54 

.87 

1.35

1.38 

.79 

.90 

.65 

.51 

.48

Fluoride

(F)

0.03 

.04 

.04 

.03 

.03 

.04

.04 

.01

.01 

.03 

.03

.04 

.03 

.04 

.04 

.03 

.03

Nitrate 

(NO,)

0.05 

.06 

.03 

.05 

.11 

.09 

.08

.07 

.04 

.45 

.07 

.15 

.07

.14 

.04 

.07 

.11 

.01 

.01
CHEYENNE RIVER BASIN Continued 

CHEYENNE RIVER NEAR EAGLE BUTTE, S. DAK. Continue

Chemical analyses, December 1950 to September 1951 Continu

Date of collection

June 27-July 2, 1951 --

Aug. 17 

Total or 

weighted average c -

Runoff 

(acrefeet)

6,500 

4,050 

25, 700 

1,950 

6,680 

20,010 

11,320

173, 100

Silica

(sicg

ppm

26 

21 

19 

17 

19 

24 

17

18

Equivalents per million

Calcium

(Ca)

5.49 

7.78 

8.83 

10.23 

9.93 

4.39 

9.43

7.68

Magnesium 

(Mg)

1.97 

3.10 

5.09 

4.25 

5.27 

1.29 

5.01

3.87

Sodium

(Na)

8.09 

7.57 

7.35 

7.22 

7.00 

6.09 

6.48

7.13

Potassium 

(K)

0.28 

.26 

.33 

.36 

.33 

.23 

.31

0.28

Bicarbonate 

(HCO,)

2.80 

3.51 

2.33 

3.83 

2.41 

2.87 

2. 52

2.85

Sulfate

(S04 )

12.08 

14.89 

18.42 

17.90 

19.67 

8.70 

18.11

15.22

Chloride

(Cl)

0.54 

.48 

.76 

.68 

' .71 

.39 

.71

0.73

Fluoride 

(F)

0.03 

.03 

.03 

.04 

.03 

.03 

.03

0.09

Nitrate 

(NO,)

0.10 

.02 

.06 

.01 

. .05 

.02 

.05

0.03

B

c For period sampled only.
PLATTE RIVER BASIN

NORTH PLATTE RIVER BELOW GUERNSEY RESERVOIR, WYO

LOCATION. At gaging station three-quarters of a mile downstream from Guernsey Dam and 1 m

DRAINAGE AREA. 16,200 square miles.

RECORDS AVAILABLE.--Chemical analyses: December 1950 to September 1951.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specifi

in regional office at Lincoln, Nebr. Records of discharge for water year October 1950 

Paper 1210.

Chemical analyses, December 1950 to September 1951

Date of collection

Dec. 7, 11, 1950 

Jan. 1-16, 1951 

Jan. 22-24 

Feb. 1-28 

MaT* 95 Q1

May 3-14 

July 6-10 

Aug. 10-31 ----- - --

Sept. 1-11 

o^in* 1 o on

Runoff 

(acrefeet)

657 

6,500 

839 

9,580

502 

222 

5,760 

2,080 

3,710 

1,900

39,000 

104, 300 

41,160 

203,000

70, 100 

75,350 

6,020

Silica 

(SiOa) 

ppm

13 

12 

15 

15

15 

13 

13 

13 

13 

12

13 

13 

10 

12

9.8 

14 

11

Equivalents per million

Calcium 

(Ca)

4.64 

5.09 

3.29 

5.44

3.54 

4.94 

4.99 

3.34 

4.04 

3.19

2.69 

2.69 

2.79 

2.54

2.64 

2.84 

3.19

Magnesium 

(Mg)

2.68 

3.03 

4.83 

3.12

4.70 

2.72 

2.83 

3.70 

2.36 

2.73

1.35 

1.39 

1.49 

1.44

1.34 

1.48 

1.69

Sodium

(Na)

4.35 

4.48 

4.96 

4.70

4.48 

4.26 

4.44 

4.39 

3.96 

3.48

1.74 

1.70 

1.83 

1.57

1.61 

1.83 

2.13

Potassium 

(K)

0.14 

.14 

.15 

.14

.15 

.13 

.14 

.14 

.12 

.13

.09 

.08 

.09 

.08

.08 

.09 

.10

Bicarbonate 

(HC03)

3.80 

4.11 

4.46 

4.29

4.13 

3.98 

3.97 

3.38 

3.18 

3.05

2.44 

2.64 

2.74 

2.56

2.59" 

2.77 

3.03

Sulfate 

(SO,)

6.87 

7.70 

8.29 

8.12

7.81 

7.04 

7.35 

7. -08 

6.25 

5.62

3.02 

2.85 

3.16 

2.73

2.79 

3.14 

3.56

Chloride 

(Cl)

0.68 

.93 

.79 

.87

.76 

.85 

.85 

.79 

.73 

.65

.28 

.28 

.31 

.28

.31 

.34 

.39

Fluoride

(F)

0.01 

.03 

.01

.02 

.02 

.02 

.02 

.02

.02 

.01 

.01 

.01

.01 

.02

.01

Nitrate 

(N03)

0.05 

.05 

.05 

.05

.05 

.05 

.05 

.03 

.02 

.08

.04 

.02 

.02 

.03

.02 

.03 

.03
PLATTE RIVER BASIN Continued 

PLATTE RIVER AT BRADY, NEBR.

LOCATION. At gaging station at highway bridges on county road south of Brady, Lincoln Coun

North Platte and South Platte Rivers. 

DRAINAGE AREA. 56,900 square miles. 

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

Water temperatures: March to September 1951. 

REMARKS. Daily samples for chemical analyses composited by discharge Records of specific 

regional office at Lincoln, Nebr. Records of discharge for water year October 1950 to S

1210.

Chemical analyses, November 1950 to September 1951

Date of collection

Nov. 24, 1950, Chan.la 

Jan. 9,1951,Chan.l a 

Feb. 28-Mar. 31 -

Apr. 1-26 

May 2-13 

May 14, Chan. 1 

May 14, Chan. 4 

May 15, Chan. 1 

May 15, Chan. 4 

May 16-17 

May 20-24 

May 25-30 

Runoff 

(acrefeet)

149 

133 

14, 420 

9,230 

2,900

3,980 

1,070 

242 

7,280 

440

14, 920 

6,980 

3,080 

3,850 

3,790 

4,500 

10, 100 

10, 490 

5,830 

17, 470

Silica 

(SiOa ) 

ppm

39 

35 

36 

29 

43

40 

33 

40 

30 

45

43 

36 

31 

35 

37 

32 

30 

43 

41 

46

Equivalents per million

Calcium

(Ca)

3.19 

2.79 

2.94 

2.69 

2.69

2.99 

2.54 

3.09 

2.74 

3.29

2.69 

3.09 

2.79 

3.19 

3.09 

2.20 

2.40 

3.04 

2.45 

2.94

Magnesium 

(Mg)

1.13 

.81 

1.06 

1.23 

1.07

1.17 

.76 

1.23 

.67 

1.40

1.15 

1.31 

.89 

1.17 

1.19 

.82 

.86 

1.16 

.93 

1.16

Sodium 

.Ola)

2. 

1. 

1.87 

2.00 

1.96

2.00 

1.74 

1.78 

1.70 

2.13

1.96 

2.00 

1.87 

2.09 

2.17 

1.30 

1.70 

1.91 

1.65 

2.00

Potassium 

(K)

44 

85 

0.23 

.25 

.26

.20 

.20 

.31 

.24 

.33

.20 

.21 

.20 

.21 

.26 

.25 

.24 

.25 

.22 

.25

Bicarbonate 

(HCO,)

b3.77 

3.16 

3.41 

3.34 

cS.38

3.51 

2.98 

3.61 

3.44 

3.98

3.15 

3.74 

3.21 

3.57 

3.83 

2.80 

3.23 

3.83 

d3.36 

e3.71

Sulfate 

(S04)

2.52 

1.92 

2.14 

2.12 

2.23

2.33 

1.85 

2.27 

1.52 

2.62

2.42 

2.33 

2.25 

2.29 

2.21 

1.48 

1.75 

2.23 

1.67 

2.25

Chloride

(Cl)

0.42 

.31 

.39 

.45 

.39

.42 

.31 

.45 

.23 

.48

.42 

.42 

.34 

.59 

.42 

.24 

.31 

.34 

.28 

.37

Fluoride

(F)

0.03 

.02 

.02 

.03 

.03

.03 

.02 

.02 

.02 

.02

.03 

.03 

.03 

.03 

.04 

.03 

.03 

.03 

.03 

.03

Nitrate 

(NO,)

0.02 

.04 

.06 

.04 

.04

.03 

.04 

.05 

.07 

.04

.05 

.03 

.03 

.03 

.02 

.06 

.03 

.03 

.04 

.03

B

a Not included in total or weighted average.

b Includes 0.20 equivalents per million carbonate (CO,).

c Includes 0. 23 equivalents per million carbonate (CO,).

d Includes 0.30 equivalents per 

e Includes 0.17 equivalents per 
Aug. 11-Sept. 5 

Sept. 6-30, Chan. 1 

Sept. 6-30, Chan. 4 

Total or 

weighted average h

25,560 

43,360 

13, 670 

g3,180

203, 100

39 

33 

40

37

2.69 

2.64 

2.99 

3.49

2.79

1.15 

1.22 

1.05 

1.65

1.15

2.30 

2.70 

2.44 

2.44

2.17 .

.25 

.25 

.26 

.36

0.24

f3. 58 

3.61 

b3.54

3.51

2.37 

2.73 

2.73 

2.62

2.31

.42 

.48 

.45

0.39

.03 

.03 

.03

0.03

.03 

.03 

.03 

.03

0.04

b Includes 0.20 equivalents per million carbonate (CO.). 

f Includes 0.27 equivalents per million carbonate (CO,).

g Not included in total, 

h For period sampled only.
PLATTE RIVER BASIN--Continued

SUPPLY CANAL (TRI-COUNTY DIVERSION) NEAR MAXWELL, N

LOCATION. At gaging station at Parshall Flume in section 28, township 13 N, Range 29 W, 

RECORDS AVAILABLE.--Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

REMARKS.--Daily samples for chemical analyses composited by discharge. Records of specif

available in regional office at Lincoln, Nebr. Records of discharge for water year Oc

reports of State Engineer.

Chemical analyses, March to September 1951

Date of collection

Mar. 1-31, 1951 

May 25 30

July 18-Aug. 10 

Aug. 11-Sept. 5 

Total or 

weighted average b

Runoff 

(acrefeet)

102,300 

94,060 

18,190 

37,390 

4,010 

3,810

7,780 

7,930 

18,720 

21,040 

10,850

13,350 

7,890 

7,950 

39,770 

11,760 

87,890

94,810 

103,700 

97,960

791,200

Silica 

(Si02 ) 

ppm

30 

26 

31 

29 

24 

23

32 

31 

30 

29 

25

34 

23 

33 

30 

24 

24

25 

24

27

27

Equivalents per million

Calcium 

(Ca)

3.24 

3.14 

2.79 

2.99 

2.94 

2.59

2.74 

2.94 

3.24 

3.04 

3.09

3.19 

2.79 

3.29 

3.24 

3.14 

3.49

3.39 

3.19 

3.14

3.19

Magnesium 

(Mg)

1.44 

1.14 

1.35 

1.37 

1.23 

.82

1.34 

1.22 

1.28 

1.44 

1.37

1.39 

1.05 

1.41 

1.54 

1.44 

1.71

1.41 

1.57 

1.56

1.48

Sodium

(Na)

3.00 

2.57 

3.09 

3.13 

2.70 

1.70

3.22 

3.52 

2.70 

3.04 

2.91

2.91 

2,00 

2.83 

2.91 

2.83 

3.57

3.61 

3.35 

3.48

3.17

Potassium 

(K)

0.25 

.33 

.28 

.24 

.26 

.31

.24 

.25 

.28 

.26 

.26

.25 

.28 

.31 

.31 

.28 

.28

.28 

.28 

.28

0.28

Bicarbonate 

HC03 )

3.64 

3.44 

3.51 

3. 5r 

3.38 

2.77

3.21 

2.59 

3.54 

3.64 

3.46

a 3. 58 

2.93 

3.52 

3.44 

3.20 

3.33

3.51 

3.56 

3.51

3.47

Sulfate 

(S04 )

3.44 

3.39 

3.39 

3.39 

3.23 

2.17

3.44 

4.39 

3.12 

3.41 

3.46

3.62 

2.58 

3.56 

3.93 

3.85 

4.81

4.37 

4. 14 

4.35

3.91

Chloride

(Cl)

0.65 

.54 

.56 

.62 

.51 

.31

.62 

.71 

.56 

;59 

.59

.59 

.42 

.59 

.62 

.62 

.73

.68 

.62 

.65

0.62

Fluoride

(F)

0.02 

.04 

.03 

.03 

.02 

.02

.03 

.03 

.02 

.02 

.02

.03 

.02 

.02 

.03 

.03 

.03

.03 

.03 

.03

0.03

Nitrate 

(N03 )

0.03 

.04 

.04 

.02 

.05 

.06

.02 

.03 

.04 

.03 

.03

.04 

.02 

.05 

.05 

.05 

.04

.04 

.04 

.03

0.04

a Includes 0. 27 equivalents per million carbonate (CO3). b For period sa
PLATTE RIVER BASIN Continued

SOUTH PLATTE RIVER AT JULESBURG, COLO.

LOCATION. At gaging station at bridge on State Highway 51, half a mile east of Julesburg

Colorado-Nebraska State line. 

DRAINAGE AREA. 22,800 square miles. 

RECORDS AVAILABLE. Chemical analyses: October 1945 to September 1951.

Water temperatures: October 1945 to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 2,060 micromhos Feb. 2; minimum, 887 

EXTREMES, 1945-51. Specific conductance: Maximum, 2,140 micromhos Dec. 30, 1946; minimu

Percent sodium (1945-50): Maximum, 82 Mar. 1-12, 1947; minimum, 30 Mar. 15, 20, 1948.

REMARKS. Records of specific conductance of daily samples available in regional office a

water year October 1950 to September 1951 given in Water-Supply Paper 1210.

Chemical analyses, water year October 1950 to September 

Date of collection

Oct. 1, 1950, Chan.la 

Oct. 1, Chan. 2 a 

Oct. 1, Chan. 4 a 

Oct. 1-31 

Nov. 1, Chan. 1 a 

Nov. 1, Chan. 2 a 

Nov. 1, Chan. 4 a 

Dec. 15, Chan. 1 a-- 

Dec. 15, Chan. 2 a-- 

Dec. 15, Chan. 4 a--

Jan. 1, 1951, Chan.2a 

Jan. 1, Chan. 4 a 

Jan. 1-7 

TQ n 14 11

Jan. 15, Chan. 2 a ~- 

Jan. 15, Chan. 4 a --

Runoff 

(acrefeet)

9.5 

9,240

7.9 

8,060

12, 170

50

20 

4,380 

10, 670

20

Silica 

(Si02 ) 

ppm

40

Equivalents per million

Calcium 

(Ca)

9.13

Magnesium 

(Mg)

4.27

Sodium

(Na)

7.00

Potassium 

(K)

0.66

Bicarbonate 

(HC03)

5.75

Sulfate 

(S04 )

13.95

Chloride

(ci)

1.80

Fluoride

(F)

0.03

Nitrate 

(N03 )

0.09

a Not included in total or weighted average.
PLATTE RIVER BASIN Continued

SOUTH PLATTE RIVER AT JULESBDRG, COLO,--Contin

Chemical analyses, water year October 1950 to September 1951 

Date of collection

Feb. 1,1951, Chan. 2- 

Feb. 1, Chan. 4 a 

Feb. 2-14 

Feb. 15, Chan. 2 - 

Feb. 15, Chan. 4 a--

Feb. 16-Mar. 14 - 

Feb. 22, Chan. 1 a-- 

Feb. 22, Chan. 2 a 

Feb. 22, Chan. 4 a 

Mar. 1, Chan. 1 a -- 

Mar. 1, Chan. 2 a 

Mar. 1, Chan. 4 a 

Mar. 15, Chan. 1 a 

Mar. 15, Chan. 2 

Mar. 15, Chan. 4 a 

Mar. 16-31 

Apr. 1, Chan. 1 a 

Apr. 1, Chan. 4 a 

Apr. 15, Chan. 1 a-- 

Apr. 15, Chan. 2 a-- 

Apr. 15, Chan. 4 a 

May 1, Chan. 1 a 

May 1, Chan. 2 

May 1, Chan. 4 a - 

Runoff 

(acrefeet)

480 

24 

8,580 

595 

19

14, 780

30

17

480 

8.7 

6,180

169 

5.2 

8,280

3.2

428 

6.3 

4,810

Silica 

(SiOa) 

ppm

30

30

28 

33 

46

Equivalents per million

Calcium 

(Ca)

10.13

8.03

8.73 

9.48 

8.53

Magnesium 

(Mg)

3.79

4.37 .

4.44 

4.28 

3.04

Sodium 

(Na)

8.26 

5.83 

7.31 

7.87 

5.87

7.48

7.39 

7.44 

5.00 

7.48

7.17 

6.76 

3.61 

7.26

8.13 

8.22 

4.09 

6.91

'otassium 

(K)

0.33

.38

.38 

.41 

.38

Jicarxmate 

HC03)

4.92

3.52

3.16 

5.01 

4.52

Sulfate 

(S04)

14.16

14.89

15.39 

15.55 

9.99

Chloride 

(Cl)

1.69

1.76

2.74 

1.64 

1.35

Fluoride 

(F)

0.03

.03

_

Nitrate 

(N03)

0.09

.06

.04 

.02 

.08

a Not included in total or weighted average.
May 15, Chan. 2 a. .. 

May 15, Chan. 4 a .. 

May 21 

May 22, Chan. la.. 

May 22, Chan. 2 a _. 

May 22, Chan. 4 a ... 

May 22 -June 22

June 1, Chan. 1 a . _ 

June 1, Chan. 2 a . _ 

June 1, Chan. 4 a . _ 

June 15, Chan. la. _ 

June 15, Chan. 2 a... 

June 15, Chan. 4 a...

Tiino 9^ 94

July 1, Chan. 1 a 

July 1, Chan. 2 a 

July 1, Chan. 4 a 

July 15, Chan. 1 a 

July 15, Chan. 2 a 

July 15, Chan. 4 a 

Aug. 1, Chan. 2 a 

Aug. 1, Chan. 4 a 

Aug. 6-10 

Aug. 10, 1951,Chan. la 

Aug. 10, Chan. 2 a -- 

Aug. 10, Chan. 4 a 

Aug. 15, Chan. la 

Aug. 15, Chan. 2 a 

Aug. 15, Chan. 4 a 

Sept. 1, Chan. 2 a 

Sept. 1, Chan. 4 a 

Sept. 8, Chan. 1 a 

Sept. 8, Chan. 2 a 

Total or 

weighted average c

8.7 

1,300

61 

12,360

38

56 

2,770 

8,280

125 

8,850

22

5.8 

12,490

504 

10, 690

123

11 

b 24, 890

146,000

18

--~

17--

4.29~~

6.39-

--

1.73~

2.65

--

--

3.30

6.83

5.44 

7.57

6.26

3.87

6.57

6.74 6

Qn

.33~~

.28

2.72

3.41

6.04

13.12

4.58 

14.68

9.16

.79~

.82

.03

--~

.04

.08~

.03

a Not included in total or weighted average. b Not included in total. 
KANSAS RIVER BASIN 

REPUBLICAN RIVER AT CAMBRIDGE, NEBR.

LOCATION. At bridge on State Highway 47, half a mile south of Cambridge, Furnas County, 

Creek, and about 1 mile upstream from gaging station at Cambridge. 

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

Vater temperatures^ December 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 760 micromhos Feb. 2; minimum, 319 mi

Percent sodium: Maximum, 29 Apr. 15-27; minimum, 15 June 18-19.

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specif

in regional office at Lincoln, Nebr. Records of discharge for water year October 1950 

Paper 1210.

Chemical analyses, December 1950 to September 1951

Date of collection

Feb. 11-12 

Apr. 1-12 

Apr. 13-14 

Apr. 15-27 

MQt, Q Q

May 10-14 

May 15-16 

May 17-21 

May 22-25 

Runoff 

(acrefeet)

5,410 

13,330 

2,250 

950 

4,710 

12,800

20, 460 

a 8, 040 

1,430 

a 6, 220 

1, 560 

2,680

a 2, 630 

2,110 

16, 640 

21,800 

14, 140 

11,700

Silica 

(Si02) 

ppm

49 

45 

46 

34 

36 

40

42 

62

42 

43

56 

44 

36 

34 

41

Equivalents per million

Calcium 

(Ca)

3.24 

3.19 

3.34 

2.45 

2.74 

2.84

2 gg 

4! 09 

3.19 

2.74 

2.84 

2.69

3.39 

2.69 

2.40 

2.40 

2.35 

2.94

Magnesium 

(Mg)

1.54 

1.65 

1.68 

1.03 

1.10 

1.44

1.55 

1.31 

1.49 

1.40 

1.07 

1.03

1.41 

1.51 

.99 

.82 

.73 

1.18

Sodium 

(Na)

1.48 

1.48 

1.43 

1.13 

1.22 

1.52

1.48 

1.74 

1.74 

1.83 

1.30 

1.43

1.83 

1.78 

1.04 

1.04 

1.04 

1.48

Potassium 

(K)

0.31 

.36 

.33 

.21 

.28 

.31

.33 

.33 

.33 

.36 

.36 

.36

.43 

.38 

.31 

.36 

.36 

.38

Bicarbonate 

(HC03)

4.93 

4.98 

5. 18 

3.49 

3.98 

4.33

4.67 

b5. 84 

c5.02 

b4.53 

4.52 

3.83

b5. 08 

4.59 

4.06 

3.61 

3.38 

4.38

Sulfate

(so,)

1.23 

1.27 

1.25 

.83 

1.06 

1.21

1.21 

1.35 

1.33 

1.42 

.92 

1.33

1.62 

1.48 

.27 

.83 

.94 

1.27

Chloride

(Cl)

0.25 

.28 

.31 

.21 

.23 

.25

.28 

.23 

.28 

.34 

.20 

.25

.34 

.34 

.17 

.16 

.18 

.25

Fluoride 

(F)

0.05 

.05 

.05 

.03 

.04 

.05

.05 

.05

.04 

.06

.06 

.04 

.04 

.03 

.05

Nitrate 

(NO,)

0. 10 

.09 

.10 

.10 

.09 

.10

.07 

.05 

.09 

.04 

.01 

.08

.02 

.07 

.05 

.06 

.09 

.09

a Not included in total, 

b Calculated.

c Includes 0. 37 equivalents pe
June 20-22 ._

July 11-19 

Aug. 11-15 - 

Sept, 12-30 

Total or 

. weighted average e25,340 

3,770 

7,320 

3,620 

18,090

3,160 

31,270 

17,850 

18,230 

9,120

81,620 

17, 730

365, 300

35 

30 

33 

34 

37

47 

35 

34 

32 

41

24 

39

35

2.30 

3.09 

2.00 

2.64 

2.59

2.89 

2.35 

2.45 

2.40 

2.79

2.15 

3.09

2.54

.86 

.93 

.63 

.84 

.83

1.27 

.77 

.87 

.82 

1.09

.63 

1.35

0.99

.91 

.83 

.52 

1.09 

1.04

1.61 

.87 

1.09 

.91 

1.43

.83 

1.61

1.13

.33 

.38 

.31 

.38 

.36

.36 

.28 

.36 

.31 

.41

.36 

.41

0.33

3.57 

4.28 

3". 05 

3.70 

3.77

4.47 

3.51 

3.64 

3.52 

4.10

3.10 

4.56

3.83

.73 

.81 

.42 

.98 

.87

1.15 

.54 

.77 

.71 

1.25

.69 

1.44

0.87

.14 

.16 

.06 

.20 

.17

.27 

.13 

.18 

.16 

.25

.10 

.27

0.18

.03 

.03 

.03 

.04 

.04

.05 

.03 

.03 

.03 

.05

.03 

.05

0.04

.06 

.05 

.02 

. 11 

.08

.06 

.04 

.05 

.02 

.05

.04 

.04

0.06

e For period sampled only.
KANSAS RIVER BASIN Continued

SALINE RIVER AT TESCOTT, KANS.

LOCATION. At gaging station at highway bridge, half a mile south of Tescott, Ottawa Count

from Dry Creek.

DRAINAGE AREA. 2,820 square miles. 

RECORDS AVAILABLE. Chemical analyses: December 1949 to September 1951.

Water temperatures: April, 1950 to September 1951. 

EXTREMES, 1950-51.--Specific conductance: Maximum, 3,770 micromhos Dec. 18; minimum, 253 

Percent sodium: Maximum, 66 Oct. 1; minimum, 11 June 8-10. 

EXTREMES, 1949-51. Specific conductance:' Maximum, 4,940 micromhos May 6, 1950; minimum, 

Percent sodium: Maximum, 75 May 5, 1950; minimum, 11 June 8-10, 1951. 

REMARKS. Daily samples for chemical analyses composited by discharge. Records of specif

available in regional office at Lincoln, Nebr. Records of discharge for water year Oc

Water-Supply Paper 1210.

Chemical analyses, water year October 1950 to September 19

Date of collection

rw»f i iQftfi

Oct. 2 

n/»t ^

Oct 4-6 

/Vif 7 Oi

Nov. 1-30 

Dec. 1-31 

Jan. 1-Feb. 5, 1951- 

Feb. 12 -Mar. 11 

Mar. 12-Apr. 2 -

Apr. 21 

Apr. 24 -May 16 

Runoff 

(acrefeet)

391 

5,080 

7,300 

10,410 

10,950

8,110 

7,230 

7,450 

6,610 

4,430

4,570 

1,800 

2,680 

1,450 

15,740

Silica 

(Si02 ) 

ppm

22 

19 

15 

20 

26

20 

20 

17 

17 

16

18 

16 

18 

17 

17

Equivalents per million

Calcium 

(Ca)

6.54 

5.04 

3.04 

3.69 

6.34

7.98 

8.28 8.58' 

8.43 

8.13

6.04 

4.79 

4.54 

4.29 

5.64

Magnesium 

(Mg)

2.88 

1.32. 

.41 

.87 

2.14

3.78 

3.72 

3.34 

2.69 

2.35

3.24 

.69 

.72 

.64 

1.20

Sodium

(Na)

19.09 

7.44 

1.48 

4.74 

12.35

21.83 

20.35 

19.48 

18.09 

18.44

14.70 

3.35 

4.30 

3.65 

3.83

Potassium 

(K)

0.25 

.18 

.19 

.20 

.28

.28 

.28 

.18 

.15 

.20

.21 

.23 

.24 

.25

.21

Bicarbonate 

(HC03)

4.82 

4.65 

3.31 

3.03 

4.95

6.29 

6.39 

6.29 

5.74 

5.05

3.24 

3.83 

3.80 

3.64 

3.57

Sulfate 

(S04)

6.77 

2.66 

.65 

2.29 

5.10

7.81 

7.81 

6.87 

6.87 

6.25

7.45 

2.25 

2.37 

1.79 

3.39

Chloride 

(Cl)

17.43 

6.66 

1.27 

3.81 

11.42

19.46 

18.61 

18.33 

16.64 

17.77

13.54 

2.88 

3.67 

3.16 

3.55

Fluoride 

(F)

0.02

.03 

.02 

.02

.02 

.02 

.02 

.02 

.02

.04 

.01 

.01 

.01 

.02

Nitrate 

(NO,)

0.06 

.01 

.04 

.02 

.09

.07 

.11 

.12 

.12 

.09

.07 

.01 

.03 

.07 

.10
May 17 

Mav 1ft *

Ulau 99 9R

May 26-28 

June 11-12 

June 13-21 

July 6-10 

July 15 

July 18-19 

July 20-Aug. 14 -

Aug. 19-Sept. 3 - 

Sept. 4-12 ---------

Sept. 13-30 ------

Total or 

weighted average c

1,890 

2,700 

30,740 

28,980

4,200 

16,150 

7,120 

4,320 

12, 890

56,730 

27,530 

65, 590 

186, 500 

91, 140

25,230 

20,430 

15,470 

73,400

19,230 

94,930 

b 28, 890

872,300

14 

17 

16 

20

17 

34 

16 

23 

16

15 

22 

21 

16 

19

22 

15 

20 

23

19 

17

19

4.24 

3.89 

3.19 

3.19

4.39 

2.79 

2.89 

3.54 

2.30

2.25 

3.59 

3.74 

2.69 

3.49

6.24 

2.64 

6.09 

6.34

6.34 

2.89 

8.78

3.99

1.15 

1.07 

.69 

.58

.53 

1.09 

.47 

1.02 

.42

.27 

..73 

.70 

.33 

.59

1.38 

.40 

1.11 

1.58

1.82 

.41 

2.04

0.82

5.87 

4.87 

1.26 

1.39

3.04 

2.09 

1.70 

1.39 

.52

.34 

1.04 

1.65 

.65 

1.39

4.87 

.61 

3.04 

6.44

9.13 

1.52 

9.48

3.17

.20 

.23 

.16 

.25

.23 

.23 

.19 

.21 

.16

.15 

.20 

.20 

.18 

.22

.25 

.18 

.23 

.26

.24 

.19 

.23

0.20

2.29 

2.95 

2.41 

2.39

2.65 

3.64 

2.20 

3.24 

2.43

2.36 

2.79 

3.02 

2.39 

2.82

4.21 

2.15 

4.24 

4.16

4.4t 

2.28 

6.48

3.13

3.29 

2.46 

1.79 

1.60

2.42 

2.21 

1.37 

1.62 

.42

.31 

1.73 

1.85 

.85 

1.64

4.02 

1.15 

3.46 

4.52

4.81 

1.39 

5.73

2.23

5.33 

4.20 

1.13 

1.18

2.74 

.37 

1.44 

1.02 

.31

.20 

.85 

1.41 

.65 

1.10

4.26 

.56 

2.57 

5.75

8.46 

1.27 

8.32

2.82

.02 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.01

.02 

.02 

.03 

.02 

.02

.02 

.02 

.02 

.03

.02 

.02

0.02

.10 

.10 

.05 

.09

.16 

.03 

.13 

.02 

.10

.02 

.-06 

.08 

.05 

.06

.14 

.05 

.19 

.21

.19 

.11 

.00

0.08

a Not included in total or weighted average. 

b Not included in total. 

C For period sampled only.
Part 7. LOWER MISSISSIPPI RIVER BASIN

ARKANSAS RIVER BASIN 

ARKANSAS RIVER BELOW JOHN MARTIN RESERVOIR, C

LOCATION. At gaging station just upstream from Caddoa Creek and li miles downstream from 

DRAINAGE AREA. 18,935 square miles.

RECORDS AVAILABLE. Chemical analyses: August 1942 to August 1943, October 1945 to July 

January to September 1951 (daily samples). 

EXTREMES, January to September, 1951. Specific conductance: Maximum 4,260 micromhos Feb

Percent sodium: Maximum, 40 Feb. 11-20, 21-28, June 21-30, July 1-5; minimum, 29 Sept

REMARKS. Records of specific conductance of daily samples available in district office a

dissolved solids are sums of determined constituents. Records of discharge for water 

Water-Supply Paper 1211.

Chemical analyses, January to September 1951

Date of collection

Jan. 21-31 

Feb. 1-10 

Feb. 11-20 

Feb. 21-28 -

Mar. 1-10 r - 

Mar. 11-20 

MQI* 91 31

Apr. 1-10 

Apr. 11-20 

May 1 10 - _

May 11-20 

May 21-31 

June 1-10- - -

June 11-20 

June 21-30, July 1-5 

Runoff 

(acrefeet)

90 

103 

84 

89 

67

112 

227 

942 

9,190 

8,740 

8,840

14, 370 

7,430 

400 

4,040 

311 

233

Silica 

(Si03 ) 

ppm

21 

20 

22 

20 

20

19 

16 

13 

11 

11 

9.6

12 

17 

18 

12 

18 

20

Equivalents per million

Calcium 

(Ca)

17.32 

17.61 

17.56 

17.27 

16.57

17.02 

16.27 

13.27 

12.57 

12.87 

13.27

13.17 

15.67 

16.87 

14.17 

16.67 

16.87

Magnesium 

(Mg)

13.98 

14.23 

14.31 

14.39 

14.39

14.56 

13.16 

8.96 

8.14 

8.31 

8.14

8.31 

10.28 

12.58 

9.37 

12.17 

12.66

Sodium

(Na)

20.18 

20.00 

20.35 

21.00 

20.74

20.44 

18.18 

12.48 

11.13 

11.31 

11.22

11.00 

15.26 

18.39 

12.57 

18.52 

19.92

Potassium 

(K)

0.14 

.16 

.22 

.17 

.18

.17 

.14 

.11 

.19 

.18 

.21

.26 

.26 

.33 

.31 

.25 

.21

3icarbonate 

(HCO3)

6.08 

6.26 

6.36 

6.21 

6.08

6.11 

6.26 

4.00 

3.54 

3.62 

3.56

3.52 

4.21 

4.98 

3.54 

4.56 

4.72

Sulfate 

(S04)

41.64 

41.85 

41.85 

42.47 

42.05

42.68 

37.89 

28.52 

26.44 

27.06 

27.06

27.48 

34.56 

39.14 

30.60 

39.14 

41.01

Chloride 

(Cl)

3.27 

3.33 

3.30 

3.38 

3.33

3.33 

2.79 

1.92 

1.72 

1.75 

1.55

1.81 

2.62 

3.16 

2.09 

3.07 

3.22

Fluoride 

(F)

0.04 

.04 

.04 

.04 

.04

.04 

.04 

.04 

.04 

.04 

.03

.04 

.04 

.03 

.04 

.04 

.04

Nitrate 

(N03)

0.08 

.08 

.09 

.07 

.05

.06 

.05 

.07 

.05 

.05 

.05

.05 

.05 

.05 

.06 

.06 

.06
July 11-20 

Sept. 1-10 

Sept. 11-20 

Total or 

weighted average --

3,140 

10, 290 

16, 170 

19,010 

12, 360 

19,580

11,070 

6,080 

7,970

160, 900

14 

13 

14 

14 

15 

14

13 

8.9 

3.4

13

10.88 

10.38 

10.18 

9.48 

9.23 

9.13

9.03 

9.23 

9.18

10.93

7.15 

6.99 

6.83 

6.00 

5.43 

5.18

5.02 

5.43 

5.59

6.83

10.26 

9.44 

9.09 

8.00 

6.83 

6.48

6.04 

6.61 

6.09

9.09

.17 

.19 

.16 

.16 

.31 

.26

.28 

.33 

.28

0.23

2.98 

2.90 

2.92 

2.74 

2.67 

2.81

2.59 

2.72 

2.47

3.06

23.32 

22.07 

21.44 

19.20 

17.68 

17.01

16.70 

17.65 

17.95

22.28

1.58 

1.49 

1.44 

1.21 

1.07 

.96

.87 

.99 

1.02

1.41

.04 

.04 

.04 

.03 

.04 

.03

.03 

.03 

.03

0.04

.06 

.06 

.07 

.07 

.08 

.10

.08 

.07 

.07

0.07
ARKANSAS RIVER BASIN -Continued 

ARKANSAS RIVER AT RALSTON, OKLA.

LOCATION. At gaging station at bridge on State Highway 18 at Ralston, Pawnee County, 2 m

upstream from Grayhorse Creek. 

DRAINAGE AREA. 54,227 square miles. 

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

Water temperatures: January 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 4,070 micromhos Jan. 5; minimum, 319 

Percent sodium: Maximum, 71 Jan. 5; minimum, 38 May 3-5. 

EXTREMES,January 1950 to September 1951. Specific conductance .-Maximum,4,070 micromhos Ja

Percent sodium: Maximum. 71 Jan. 5, 1951; minimum, 36 July 18-20, 1950.

REMARKS. Records of specific conductance of daily samples available in district office a

water year October 1950 to September 1951 given in Water-Supply Paper 1211.

Chemical analyses, water year October 1950 to September 

Date of collection

Oct. 1-3, 8, 1950 

Oct. 4-7 

riot Q in

Oct. 11-13 

Oct. 14-16 

Oct. 17-20 

Nov. 1-10 

Nov. 11-20 

Nov. 21-30 

Dec. 1-10 

Dec. 11-20 

Dec. 21-31 

Jan. 1-4, 6-10, 1951-

Jan. 11-20 

Jan. 21-31 - 

Runoff 

(acrefeet)

32, 570 

27, 530 

31,100 

33,160 

20, 010 

21, 440 

51, 110 

41,650 

38, 780 

36, 440

35,210 

39, 370 

39, 490 

32,750 

3,808 

35,900 

37, 110

Silica 

(SiOa) 

ppm

15 

13 

13 

14

17 

15 

15

12

Equivalents per million

Calcium 

(Ca)

5.19 

5.99 

3.09 

3.39 

4.69 

5.84 

5.94 

5.89 

6.49 

6.99

7.28 

6.84 

6.84 

6.19 

7.68 

6.94 

7.19

Magnesium

(Mg)

2.30 

2.80 

1.15 

1.40 

1.97 

2.88 

2.96 

3.04 

2.96 

3.29

3.37 

2.96 

3.12 

3.29 

3.95 

3.29 

3.45

Sodium 

(Na)

10. 

12. 

4. 

5. 

8. 

10. 

12.92 

13.48 

14.00 

14.87

15.74 

15.22 

16.09 

16. 

29. 

16.92 

17.

Potassium 

(K)

30 

23 

71 

75 

52 

52 

0.26 

.26 

.31 

.21

.28 

.19 

.18 

17 

32 

.16 

12

Bicarbonate 

(HCOJ

3.51 

3.80 

2.56 

2.64 

3.24 

3.89 

3.74 

3.75 

4.56 

4.64

4.77 

4.62 

4.49 

4.36 

4.26 

4.47 

4.49

Sulfate 

(SO,)

5.04 

5.89 

2.35 

2.71 

4.41 

5.95 

6.48 

6.10 

5.77 

6.50

7.20 

5.91 

6.83 

6.00 

5.85 

7.04 

6.93

Chloride 

(Cl)

8.88 

11.28 

3.98 

5.13 

7.47 

9.36 

11.34 

12.69 

12.69 

13.96

14.95 

14.36 

14.95 

15.51 

30.46 

15.51 

16.36

Fluoride 

(F)

--

0.03 

.03 

.00 

.02

.03 

.04 

.03

.02

Nitrate 

(NO,)

0.06 

.05 

.06 

.06 

.06 

.04 

.04 

.03 

.03 

.04

.09 

.11 

.12 

.08 

.08 

.11 

.08
Feb. 1-10 - 

Feb. 11-20 

Feb. 21, 26-28 

Feb. 22-25 

Mar. 1-2, 5-10 

Mar. 3-4 

Mar. 11-20 

Mar. 21-31 

Apr. 1-3, 9 

Apr. 4-5, 10 

Apr. 6-8 

Apr. 11-20 

Apr. 21-30 

May 1, 7 

May 2, 6 

May 3-5 

May 8-10 

May 11, 18 

May 12-17 

May 19-20 - 

May 21, 24 

May 22-23, 25 

May 26-31 

June 1, 8 

June 2-7------------

June 9-10 -

June 11-12, 15-16, 19 

June 13-14, 17-18, 20 

June 21, 23, 25 

June 22, 29-30 

June 24, 26-28 

July 1, 5-8 ... 

July 2-4 

July 9-10 

July 11-13 -----~

July M, 18 - - - 

JulyJ5-17 

July-19-20 

July 21, 26-28 

July 22-25,29-31 

35,840

36,480

25, 690

44,370

52,380

15, 070

48, 060

47, 230

37,090

24, 260

19,810

66, 330

50,640

67, 720

108,900

246,100

42,720

54,470

87,170

306,400

361, 400

388, 800

386,200

86,880

143,800

205,100

236, 600

191,800

243, 200

204,700

519, 700

620,400

667, 800

102, 500

156,100

246, 300

611,700

143,800

169,600

212,000

13

13

6.0

7.68

6.69

7.28

5.44

6.69

6.04

6.84

6.49

4.79

5.69

6.59

4.79

4.79

3.09

2.40

2.00

3.99

4.59

3.69

1.80

2.00

2.34

3.59

4.69

5.64

2.30

2.79

3.54

2.99

2.64

2.00

2.34

1.75

3.89

3.89

2.10

1.20

2.70

3.14

3.69

3.78

3.21

3.54

2.38

3.29

2.88

3.21

3.45

2.06

2.38

2.80

2.22

2.55

1.15

.82

.66

1.48

1.73

1.48

.69

.81

.82

1.32

1.81

2.14

.72

1.07

1.32

1.07

.90

.68

.90

.62

1.56

1.64

.81

.59

1.07

1.32

1.81

19.05 1 

15.83 

17.95 

10.68 

16.74 

13.87

16.61 I 

17.04

9.77 

12.70 

17.45 

14.65 I 

15.13 I 

5.55 

3.38 

1.66 

7.68 

8.90 

6.48 

3.28 

3.82 

5.13 

6.80

7.55

9.92

2.76

4.48

5.49

4.98

3.93

3.23

2.88

2.01

4.86

5.75

2.35

1.50

3.34

4.26

6.54

.20

.23

4.84

4.25

3.66

3.06

3.99

3.54

4.34

3.67

3.23

3.51

3.79

3.31

3.02

2.54

2.20

1.98

3.24

3.29

2.80

1.72

1.74

1.90

2. 57

a3.12 

3.67 

1.88 

2.26 

2.67 

2.29 

2.11 

1.79 

1.98 

1.66 

2.70 

2.67 

1.75 

1.34 

2.31 

2.52 

3.56

7.20

5.75

6.54

4.23

6.65

5.77

6.83

6.93

3.56

4.41

4.77

4.14

4.75

1.56

1.02

.60

2.23

2.33

2.16

.77

1.17

1.54

3.23

4.50

5.52

1.23

2.19

2.89

2.35

1.98

1.29

1.62

.96

3.10

3.14

1.23

.71

1.81

2.37

3.21

18.47

15.65

18.47

11.14

15.79

13.40

15.65

16.36

9.73

12.75

18.19

14.67

15.65

5.64

3.33

1.69

7.62

9.53

6.63

3.24

3.67

4.80

5.87

6.35

8.46

2.62

3.84

4.74

4.34

3.33

2.79

2.48

1.72

4.46

5.42

2.23

1.18

2.93

3.78

5.22

.02

.02

.02 

.02

.09 

.08 

.10 

.07 

.09 

.08 

.09 

.02

.10 

.10 

.09 

.03 

.02 

.05 

.05 

.05 

.06 

.07 

.06 

.04 

.05 

.05 

.04

.08 

.05 

.05 

.05 

.05 

.06 

.05 

.04 

.04 

.04 

.05 

.05 

.05 

.06 

.06 

.05 

.05

a Includes 0. 20 equivalents per million of carbonate (CO3).
ARKANSAS RIVER BASIN Continued 

ARKANSAS RIVER AT RALSTON, OKLA . Continued 

Chemical analyses, water year October 1950 to September 1951 

Date of collection

Aug. 1-10, 1951 

Aug. 11-12, 17, 20 

Aug. 13-16, 18-19 

Sept. 1-7 

Sept. 8-10 

Sept. 11, 14-16 ~

Sept. 12-13, 17-20 

Qent 94 9Q 3ft

Total or 

weighted average 

Runoff 

(acrefeet)

147, 900 

54, 620 

96, 360 

106,500 

76, 070 

158,300 

223, 900 

202, 100 

53, 240 

67,320 

187, 800

9,246,648

Silica 

(SiO,) 

ppm

18 

18

-

Equivalents per million

Calcium 

(Ca)

5.19 

4.94 

3.79 

4.94 

4.64 

1.85 

2.15 

2.94 

4.09 

2.84 

2.40

3.04

Magnesium 

(Mg)

2.30 

2.14 

1.81 

2.22 

1.89 

.68 

.82 

.41 

1.97 

.99 

.81

1.23

Sodium 

(Na)

8.48 

8.6 

6.7 

9.04 

8.5 

2.4 

3.9 

6.4 

7.4 

4.3 

2.6

Potassium 

(K)

0.20 

8 

2 

.18 

8 

1 

1 

5 

4 

4 

7

5.35

Bicarbonate 

(HC03)

4.02 

3.56 

2.95 

3.70 

3.41 

1.85 

1.98 

2.18 

3.20 

2.21 

2.02

2.38

Sulfate 

(S04)

4.20 

4.04 

2.89 

4.12 

3.25 

.79 

1.46 

2.35 

3.62 

1.96 

1.33

2.31

Chloride 

(Cl)

8.18 

8.12 

6.43 

8.60 

8.40 

2.28 

3.38 

5.22 

6.63 

3.95 

2.68

4.91

Fluoride 

(F)

0.02 

.02

-

Nitrate 

(N03)

0.03 

.04 

.05 

.05 

.05 

.05 

.06 

.05 

.05 

..05 

.05

0.05
ARKANSAS RIVER BASIN Continued

ARKANSAS RIVER AT VAN BUREN, ARK.

LOCATION. At gaging station at Van Buren, Crawford County, li-miles downstream from Lee C

DRAINAGE AREA. 150,218 square miles.

RECORDS AVAILABLE. Chemical analyses: October 1945 to September 1951.

Water temperatures: October 1945 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 3,830 micromhos Jan. 12; minimum, 327 

Percent sodium: Maximum, 69 Jan. 1-3, 10, 11-13, 21-27; minimum, 32 July 18-27. 

EXTREMES, 1945-1951. Specific conductance: Maximum, 3,830 micromhos Jan. 12, 1951; minim

Percent sodium: Maximum, 80 Oct. 21-24, 1946; minimum, 32 July 18-27, 1951.

REMARKS. Values reported for dissolved solids concentrations less than 1,000 ppm are resi

more than 1,000 ppm are sum of determined constituents. Records of specific conductanc

office at Fayetteville, Ark. Records of discharge for water year October 1950 to Septe

Chemical analyses, water year October 1950 to September 1

Date of collection

/V*f 1 1 IQ^fk

Oct. 11, 16-20 

fY*t 91 9fl

Oct. 27-31 

Nov. 11-15, 18-20 

Nov. 16-17 

Nov. 21-22, 25-27 

Nov. 23-24, 28-30 

Runoff 

(acrefeet)

156, 100 

351,300 

248,700 

171,200 

165,000 

89, 970 

171,700 

120,700 

31,260 

70,250 

69,220

Silica 

(SiOa ) 

ppm

18 

16

Equivalents per million

Calcium

(Ca)

2.69 

3.09 

2.59 

3.34 

3.44 

4.79 

4.54 

4.89 

5.64 

4.49 

5.39

Magnesium 

(Mg)

0.82 

1.15 

.99 

1.32 

1.07 

2.06 

1.89 

1.97 

2.30 

1.81 

2.22

Sodium 

(Na)

4.44 

5.74 

5.39 

6.48 

6.00 

10.57 

11.48 

12.52 

14. 

11.44 

13.35

Potassium 

(K)

0.26

.38 

61

Bicarbonate 

(HCO,)

2.05 

a2.29 

2.08 

2.43 

b2. 56 

b3. 15 

2.79 

b2.85 

a 3. 08 

c2.82 

c2.99

Sulfate

(S0<)

1.25 

1.33 

1.15 

1.83 

1.50 

2.52 

2.29 

2.21 

2.37 

1.89 

2.31

Chloride

(CD

4.37 

5.87 

5.50 

6.54 

6.35 

11.70 

12.55 

13.82 

17.06 

12.83 

15.09

Fluoride

(F)

0.03 

.02

Nitrate

(N03 )

0.04 

.07 

.07 

.05 

.05 

.05 

.05 

.04 

.04 

.04 

.04

a Includes 0.07 equivalents per million of carbonate (CO3). 

b Includes 0.13 equivalents per million of carbonate (CO,), 

c Includes 0. 20 equivalents per million of carbonate (CO,).
ARKANSAS RIVER BASIN Continued 

ARKANSAS RIVER AT VAN BUREN, ARK. Continued 

Chemical analyses, water year October 1950 to September 1951 C

Date of collection

Dec. 1-2, 7-10, 1951- 

Dec. 3-6 - .

Dec 11 14 -

Dec. 12-13 

Dec. 15-20 

Dec. 21-23, 30-31 

Dec 24 29

Jan. 1-3, 10, 1951 

Jan. 4-9 

Jan. 11-13 

Jan. 14-15, 20 

Jan. 16-19 

Jan. 21-27 

Jan. 28-31 

Feb. 1-4, 10 

Feb. 6, 8 

Feb. 11-14 

Feb. 15-16 

TJI _i_ in in

Mar. 1-6 

Ma i* 7 1 n

Ua« 11 IK Qfl

Mar. 12-14 

Ma*» 91 9Q

Mar. 30-31 

Runoff 

(acrefeet)

77,950 

54,110 

24, 520 

23,090 

75,490 

66,330 

78,590 

54,150 

77,590 

43,160 

57,560 

87,070 

106, 800 

45,040

46, 990 

50,620 

34, 510 

71,720 

115,000 

204, 300 

1,907,000 

529,000 

284,600 

580, 000 

426, 800 

348, 300 

47,210

Silica 

(SiOa) 

ppm

12 

10

9.9

Equivalents per million

Calcium 

(Ca)

5.59 

4.89 

5.29 

4.79 

5.59 

6.14 

5.29 

6.19 

5.34 

6.64 

5.04 

4.09 

5.89 

4.89

4.99 

3.99 

3.54 

4.44 

2.74 

1.40 

2.00 

2.30 

2.69 

2.10 

2.79 

3.04 

3.99

Magnesium 

(Mg)

2.38 

1.97 

2.06 

1.89 

2.38 

2.47 

2.06 

2.71 

2.38 

2.88 

2.22 

2.06 

2.55 

2.30

2.30 

1.89 

1.56 

1.97 

1.32 

.70 

.90 

.79 

1.15 

.81 

.99 

1.15 

1.73

Sodium 

(Na)

14.65 

13.13 

12.61 

10.48 

15.92 

16.83 

14.00 

20.05 

15.78 

21.05 

15.00 

11.78 

18.65 

14.09

14.44 

10.39 

8.35 

12.26 

7.04 

3.04 

4.44 

3.57 

4.96 

3.35 

5.44 

5.67 

9.00

Potassium 

(K)

0.31 

.54

.21

Bicarbonate 

(HCOj)

d3.28 

2.95 

3.11 

2.92 

3.26 

3.46 

3.11 

3.38 

3.08 

cS.33 

2.64 

2.49 

2.77 

2.93

3.15 

2.57 

2.38 

2.56 

1.57 

1.11 

1.31 

1.61 

1.77 

1.52 

1.69 

2.23 

2.36

Sulfate 

(S04)

2.66 

2.37 

2.27 

1.69 

2.62 

2.44 

2.19 

3.02 

2.52 

2.77 

2.37 

1.94 

2.52 

2.42

2.56 

2.12 

1.87 

2.08 

1.29 

1.10 

1.52 

.92 

1.37 

1.00 

1.00 

1.39 

1.92

Chloride 

(Cl)

17.34 

14.72 

14.52 

12.75 

17.91 

20.31 

16.41 

22.05 

17.54 

24.03 

17.06 

13.11 

21.43 

15.37

15.57 

11.51 

9.25 

13.76 

8.18 

3.10 

4.85 

4.03 

5.64 

3.64 

6.15 

6.35 

10.29

Fluoride 

(F)

0.01 

.02

.01

Nitrate 

(NO,)

0.04 

.04 

.04 

.07 

.05 

.04 

.04 

.05 

.03 

.05 

.03 

.04 

.05 

.05

.04 

.05 

.04 

.02 

.03 

.03 

.03 

.04 

.05 

.03 

.05 

.06 

.04

c Includes 0.20 equivalents per million of carbonate (CO,), 

d Includes 0.33 equivalents per million of carbonate (CO,).
Apr. 1-4, 8-10 - 

Apr. 5-7 - 

Apr. 11, 14 - 

Apr. 12-13, 15-20 - 

Apr. 21-30 - 

May i-e - 

May 7-12 . 

May 13-15 - 

May 16, 18-19 - 

May 17, 20 - 

May 21-23 

May 24-26, 29-31 

May 27-28 

June 1-6, 9, 11-12 

June7-8 ----- 

June 10, 13-18, 20 

June 19, 21-30 

July 1, 4-5, 9 

July 2-3, 6-8, 10 

July 11-17 ------

July 18-27 

July 28-31 

Aug. 1-10 - - 

Aug. 11-15 - 

Aug. 16-20 - 

Aug. 21-29 - 

Aug. 30-31 - 

Sept. 1-5, 8, 11 - 

Sept. 6-7, 9-10, 12 - 

Sept. 13-20 - 

Sept. 21-23, 29-30- 

Sept. 24-28 - 

Total or 

weighted average

163,200

65,380

114,200

378,800

460,000

623,000

671,800

223,300

191,600

218,600

880,700

1,221,000

499,800

1,174,000

118,800

1,547,000

2,098,000

1,579,000

2,442,000

2,339,000

3,743,000

718,800

775,900 

260,100 

212,800 

279,300 

42,840 

324,500 

355,00' 

1,531,0 J 

491,500 

348,100

33,274,920

7.3

14

13

11

13

15

3.69

5.19

4.24

3.04

2.94

2.74

2.00

2.74

2.89

3.99

3.39

3.14

2.20

3.34

4.29

1.95

2.84

2.45

2.15

2.35

1.90

2.30

2.79

2.99

3.64

3.19

3.79

3.49

2.59

2.20

2.25

2.64

2.64

1.64

2.55

1.81

1.15

1.32

1.15

.72

.99

1.15

1.64

1.32

1.15

.90

1.32

1.56

.99

.99

.68

.62

.75

.53

.67

1.07

1.07

1.48

1.23

1.40

1.40

.90

.59

.65

.82

0.99

9.13

15.18

10.18

7.57

7.48

5.96

2.35

3.35

5.09

7.22

8.74

5.61

4.00

5.26

7.31

3.61

3.61

2.78

1.91

1.65

1.13

2.39

3.57

3.87

6.13

5.00

6.09

6.17

4.17

2.35

2.44

3.26

4.17

12

14

.15

.11 

.12

.15

2.23

2.66

2.59

2.28

1.84

2.00

1.92

2.16

2.33

2.74

2.41

2.25

2.02

2.41

2.67

1.97

2.20

2.00

1.95

2.06

1.84

2.06

2.41

2.25

2.77

2.54

2.93

2.52

2.18

1.95

2.06

2.36

2.06

1.62

2.5.2

1.77

1.48

1.29

1.10

.65

.96

1.25

1.77

1.89

1.69

1.35

2.14

2.77

1.19

1.42

1.10

.94

.94

.65

.94

1.12

1.42

1.81

1.48

1.75

1.42

1.02

.60

.83

1.08

10.29

17.15

11.22

8.12

8.24

6.35

2.28

3.61

5.39

7.84

9.00

6.15

3.86

5.30

7.05

3.53

3.58

2.68

1.83

1.61

1.10

2.48

3.78

4.51

6.66

5.56

6.99

6.77

4.51

2.54

2.51

3.38

1.23 4,43

.02

.03

.02

.02

.02

.03

.03 

.11 

.11 

.06 

.05 

.06 

.06 

.15 

.14 

.16 

.13 

.05 

.04

.06 

.06 

.04 

.04 

.04 

.05 

.04 

.04 

.04 

.04 

.08 

.05 

.09 

.05 

.06 

.07 

.06 

.06 

.06

0.05
ARKANSAS RIVER BASIN--Continued

CIMARRON RIVER AT MANNPORB, OKLA.

LOCATION. At county highway bridge half a, mile north of Mannford, Creek County, li miles 

upstream from mouth.

DRAINAGE AREA. 18,822 square miles (revised). 

RECORDS AVAILABLE.--Chemical analyses: October 1949 to September 1951.

Water temperatures: October 1949 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 20,200 micromhos Feb. 1, Apr.

Percent sodium: Maximum, 88 Apr. 8; minimum, 63 Sept. 10. 

EXTREMES, 1949-51. Specific conductance: Maximum, 20,200 micromhos Feb. 1, Apr.

Percent soduim: Maximum, 88 Apr. 8, 1951; minimum, 63 Sept. 10, 1951.

REMARKS. Records of specific.conductance of daily samples available in district office a

available for this station for period October 1950 to September 1951.

8; mini

8, 1951

Chemical analyses, water year October 1950 to September 19

Date of collection

Oct. 1-7, 1950 

Oct. 8-10 

Oct. 11-12, 18-20 

Oct. 13-17 

Oct. 21-31 

Nov. 1-10 

Nov. 11-20 

Nov. 21-30 

Dec. 11-20 

Dec 21 31

Feb. 1-5 

Feb. 6-10 

Feb. 11-19 

Fob 20 

Runoff 

(acrefeet)

Silica 

(Si02 ) 

ppm

14 

16

16

13 

12

6.6

Equivalents per million

Calcium 

(Ca)

10.48 

13.07 

12.83 

10.73 

14.97 

16.27 

17.37 

17.32

18.86 

17.07 

15.82 

14.72 

15.17 

14.82 

18.36

24.55 

16.72 

15.77 

7 19

Magnesium 

(Mg)

4.60 

5.84 

6.00 

4.93 

7.32 

7.90 

8.63 

8.47

8.63 

8.39 

7.73 

7.32 

7.81 

7.48 

8.88

11.35 

7.90 

7.98 

4 11

Sodium 

(Ha)'

48 

79 

74 

56 

89.14 

99.15 

110 

109. 58

113 

98.28 

103.49 

97 

111.32 

111 

152

154 

104 

104 

SO

Potassium 

(K)

73 

59 

69 

13 

0.54 

.69 

09 

.72

48 

.82 

.77 

41 

.44 

16 

23

41 

.59 

73 

77

Bicarbonate 

(HC03)

3.61 

3.92 

4.07 

3.77 

3.31 

3.33 

4.00 

4.42

4.65 

4.88 

4.56 

4.42 

4.06 

3.95 

4.54

3.57 

4.23 

3.92 

 ). on

Sulfate 

(SO,)

6.54 

7.62 

7. 52 

5.89 

7. 56 

7.79 

8.22 

8.60

8.54 

8.06 

8.68 

7.83 

8.49 

8.74 

10.72

8.95 

6.97 

7.12 

3 70

Chloride 

(Cl)

53.59 

86.87 

81.79 

62.05 

100. 97 

109. 43 

123.81 

120. 71

127.76 

112.25 

114.50 

107. 17 

120.15 

120.71 

164, 14

177.68 

117.89 

117.33

RR 9.R

Fluoride 

(F)

0.02 

.00

.00

.00 

.01

.02

Nitrate 

(N03 )

0.07 

.09 

.14 

.08 

.06 

.04 

.06 

.02

.02 

.10 

.07 

.03 

.06 

.06 

.07

.11 

.12 

.11 

in
Feb. 21-23 

Feb. 24-28 

Mar. 1-5 

Mar. 6-10 

Mar. 11-12, 18-20 

Mar. 13-17 

Mar. 21-31 

Apr. 1-7, 10- 

Apr. 8 

Apr. 9 

Apr. 11-15 - 

Apr. 16-20 

Apr. 21-22 

Apr. 23-30 

May 1, 9-10 

May 2, 7 

May 3, 5 - 

May 4, 6 

May 8 

May 11-12 

May 13, 18 - 

May 14-15 

May 16, 19-20 

May 17 

May 21, 26-29- 

May 22-23, 30- 

May 24-25, 31-

June 1-2, 10 

June 3-7 

June 8-9 

June 11, 20 

June 12-13 

June 14-15, 19 

June 16-17 

June 21, 25-26, 29-30- 

June 22, 27-28 

June 23-24 

_.

..

..

--

-_

12

._

--

_-

_.

-.

-_

__

__

__

_-

__

_.

_.

--

_.

_.

-.

-.

-.

--

-.

4.94

6.99

10.48

14.17

13.52

11.68

15.32

14.52

16.87

13.27

12.48

14.47

10.08

11.33

9.93

4.49

3.14

3.69

7.48

12.52

8.98

3.99

4.99

8.18

5.84

4.54

3.79

4.54

7.34

3.99

5.19

7.14

3.64

2.89

5.49

6.74

3.19

2.71

3.54

5.43

7.16

6.58

5.84

7.98

7.48

8.63

6.74

6.33

6.83

4.11

6.58

4.93

2.06

1.32

1.56

3.21

6.17

5.10

2.47

2.22

6.74

2.30

1.81

1.48

2.22

3.54

1.97

2.30

3.54

1.64

1.23

1.97

2.30

1.23

26

43

72

124

54

86

16

22

89.08

72

10.45

110

188

135

92

114

52

85

62

18

10

13

31

90

57

17

25

33

23

18

13

17

26

12

18

33

12

7

15

21

9

53

56

87

63

18

76

09

81

53

79

08

89

43

.58

51

79

.74

.17

.51

.39

.80

.83

.71

.86

.83

.87

.90

.98

.80

.25

.79

.83

2.90

2.82

3.75

3.88

3.94

5.00

3.97

3.93

3.52

a3.90

3.69

3.64

2.49

3.41

3.10

2.56

2.41

2.39

b2.74

a3.95

C3.49

2.38

2.21

d2.78

2.69

2.69

2.44

2.77

3.39

2.46

2.46

b3.26

2.23

2.23

2.10

e2.43

a2.28

2.73

4.64

6.72^

10.20

7.35

6.60

8.60

8.70

13.12

10.22

10.72

11.78

4.62

7.16

5.37

1.81

1.37

1.79

3.02

7.27

5.66

1.83

3.29

3.14

4.08

3.50

2.77

3.44

5.48

2.87

4.81

6.27

3.00

1.79

4.75

5.87

2.16

28.48

46.82

77.56

131.43

97.87

78.97

120. 15

120.15

197. 42

141.02

97.02

119.86

59.79

92.79

69.10

20.17

11.51

14.38

36.38

97.87

62.61

19.88

26.79

42.30

24.68

18.90

13.82

18.19

28.77

13.40

19.04

34.97

12.97

7.84

15.79

22.42

9.73

__

--

.-

--

--

.00

_

--

--

--

__

__

__

__

-_

__

__

__

--

__

__

__

_

__'

..

__

__

.08

.11

.04

.04

.02

.02

.04

.09

.07

.05

.14

.11

.10

.08

.08

.09

.06

.12

.13

.11

.11

.11

.09

.21

.08

.06

.07

.07

.10

.06

.05

.08

.06

.06

.07

.11

.08

a Includes 0.10 equivalents per million of carbonate (CO,), 

b Includes 0. 23 equivalents per million of carbonate (CO,), 

c Includes 0. 20 equivalents per million of carbonate (CO,).

d Includes 0.17 equiva

e Includes 0.07 equiva
ARKANSAS RIVER BASIN Continued

CIMARRON RIVER AT MANNFORD, OKLA. Continued

Chemical analyses, water year Octooer 1950 to September 1951--C

Date of collection

July 1, 3-4, 8, 1951 --

July 5-7, 9-10 

July 13-14, 16-18 -

July 21-22, 27-28 

July 23-26, 29-31 -

Aug. 1, 3-7 

Aug. 2, 8-10 ----- 

AUg. 11, 17-20 -----

Aug. 12-13 

Aug. 14-16 

Aug. 21-24 

Sept. 6-7 

Sept. 8-9 

Sept. 10 

Sept. 11-12 

Sept. 13-14 _ 

Sept. 15 

Sept. 16-20 

Qant 91 -9 R 97

Sept. 26, 28-30 

Runoff 

(acrefeet)

Silica 

(Si02 ) 

ppm

-

Equivalents per million

Calcium 

(Ca)

4.54 

6.79 

3.89 

4.64 

5.89 

8.08 

8.43 

9.33

10.43 

11.18 

10.33 

5.49 

7.83 

10.98 

14.12

13.57 

12.97 

4.19 

2.34 

2.54 

4.44 

8.28 

4.99 

6.84 

11.68

Magnesium 

(Mg)

1.73 

2.38 

1.32 

1.81 

2.63 

3.70 

4.11 

4.52

4.60 

5.51 

5.26 

2.55 

4.19 

5.76 

6.83

7.24 

6.99 

2.30 

.90 

.99 

1.73 

4.28 

2.30 

3.45 

5.43

Sodium

(Na)

15 

17 

10 

12 

19 

28 

33 

42

45 

55 

63 

24 

29 

67 

95

98 

69 

19 

5 

8 

16 

60 

33 

39 

72

Potassium 

(K)

88 

74 

07 

53 

31 

56 

86 

09

85 

84 

65 

01 

09 

05 

41

63 

16 

86 

42 

98 

01 

44 

41 

58 

25

Bicarbonate 

(HC03 )

a2. 11 

e2.08 

e2.08 

a2.38 

2.98 

3.31 

f3.27 

3.39

a 3. 06 

2.7§ 

2.85 

c2.76 

gS.Ol 

2.90 

2.38

2.33 

2.49 

1.92 

1.38 

2.03 

2.16 

3.10 

2.34 

2.72 

3.34

Sulfate 

(S04 )

3.60 

6.81 

2.85 

3.62 

4.64 

6.48 

6.70 

7.64

8.68 

9.08 

7.20 

3.56 

5.16 

7.52 

7.89

9.62 

8.95 

2.08 

.46 

1.10 

1.37 

8.24 

3.29 

4.20 

5.56

Chloride

(CD

16.36 

17.91 

10.29 

12.97 

20.17 

30.46 

36.38 

44.84

49.07 

60.64 

69.10 

25.66 

42.87 

73.33 

106.04

107.45 

77.56 

22.28 

6.77 

9.31 

18.61 

61.48 

34.97 

42.87 

00.38

Fluoride 

(F)

--

Nitrate 

(N03)

0.08 

.11 

.06 

.01 

.04 

.09 

.05 

.07

.07 

.06 

.09 

.09 

.07 

.04 

.05

.04 

.12 

.07 

.05 

.07 

.04 

.18 

.10 

.08 

.08

a Includes 0.10 equivalents per million of carbonate (CO3) 

c Includes 0.20 equivalents per million of carbonate (CO3) 

e Includes 0.07 equivalents per million of carbonate (CO3)

f Includes 0. 27 equiva

g Includes 0.40 equiva
ARKANSAS RIVER BASIN Continued

CANADIAN RIVER NEAR TASCOSA, TEX.

LOCATION.--At Boy's Ranch near Tascosa, Oldham County, 20 miles upstream from gaging sta

DRAINAGE AREA.--19,287 squire miles above gaging station (revised)

RECORDS AVAILABLE.--Chemical analyses: June 1948 to September 1951*. 

Water temperatures: February 1949 to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 3,600 micromhos Mar. 

Percent sodium: Maximum, 71 Apr. 5-6, June 14, 18-30; minimum, 50 Aug

EXTREMES, 1948-51. Percent sodium: Maximum, 71 Apr. 5-6, 1951, June 14,

REMARKS. Values reported for dissolved solids concentrations less than 1,000 ppm are re

more than 1,000 ppm are sum of determined constituents unless noted otherwise. Recor

available in district office at Austin-, Tex. Discharge records for gaging station ne

to September 1951 given in Water-Supply Paper 1211. Total acre feet values reported 

sewage effluent entering Canadian River between sampling point and gaging station. N

and gaging station except during periods of heavy local rains.

Chemical analyses, water year October 1950 to Septemb

2; minimum, 416 

. 11-12. 

18-30, 1951; m

Date of collection

Oct. 1-3, 17, 1950 

Oct. 4-10 

Oct. 11-16, 18-20 

Oct. 21-26, 30-31 

rtft 97 90 __ __

Nov. 1-10 

Nov. 11-15 

Nov. 21-30 ----- 

Dec. 1-10 

Dec. 11-20 -----

Dec. 21-24, 29-31 

flat 9R 9ft

Jan. 1-10, 1951 

Jan. 21-30 

Runoff 

(acrefeet)

6,490 

936 

462 

294 

89 

327 

151 

131 

256

206 

335 

300 

157 

466 

637 

329

Silica 

(SiOa) 

ppm

20 

17 

17 

19 

18 

20 

20 

20 

21

19 

17 

16 

18 

16 

17 

18

Equivalents per million

Calcium 

(Ca)

2.69 

3.24 

3.29 

3.19 

3.89 

3.14 

2.89 

2.59 

2.64

2.94 

3.59 

3.74 

2.79 

3.49 

3.64 

3.19

Magnesium 

(Mg)

1.73 

2.14 

2.88 

3.04 

3.70 

2.80 

3.04 

2.22 

2.38

2.47 

3.29 

3.04 

2.22 

3.62 

3.54 

2.96

Sodium 

(Na)

Potassium 

(K)

5.39 

9.26 

11.68 

12.20 

15.51 

9.62 

10.30 

6.60 

7.95

8.14 

10.96 

12.18 

5.90 

11.34 

12.28 

10.62

Bicarbonate 

(HCOj)

3.62 

3.36 

3.75 

3.93 

3.69 

4.49 

5.15 

4.90 

4.61

4.16 

4.67 

.57 

.67 

.39 

.85 

.29

Sulfate 

(SO,)

3.06 

5.39 

6.43 

6.54 

8.60 

5:52 

5.77 

3.41 

4.35

5.10 

6.00 

6.31 

2.79 

5.64 

5.77 

5.62

Chloride

(ci)

3.02 

5.78 

7.61 

7.90 

10.72 

5.50 

5.25 

3.05 

3.95

4.23 

7.11 

8.04 

3.41 

8.35 

8.77 

6.80

Fluoride 

(F)

0.04 

.04 

.04 

.02 

.03 

.03 

.04 

.04 

.04

.04 

.04 

.04 

.04 

.05 

.05 

.04

Nitrate 

(N03)

0.07 

.07 

.02 

.04 

.06 

.02 

.02 

.01 

.02

.02 

.02 

.00 

.00 

.02 

.02 

.02
ARKANSAS RIVER BASIN Continued 

CANADIAN RIVER NEAR TASCOSA, TEX. Continu

Chemical analyses, water year October 1950 to September 195

Date of collection

Feb. 1-10, 1951 

Feb. 11-19 

Feb. 20-21, 23, 27-28

TT_i_ OO *)A Oft

Mar. 1, 16-20 

Mar. 2-3, 14-15- 

Mar. 21-31 

Apr. 1-4, 7-10 

Apr. 11-13, May 13,14

May 14, 15, 16 

May 16, 17-20 

May 21-26, 31 

May 27-30 

June 4, 5, 7-11- 

June 5, 6-, 12-13, 15-17

June 14, 18-30 

July 1-2, 3, 5-7,

U 1O 1Q

JulyS, 4, 8-10, 13,

M ot on

July 13, 15-20 

Runoff 

(acrefeet)

494 

345 

545 

1,270 

371 

133 

1,050

391 

71 

76 

24, 260 

42,780 

3,930 

988

401 

2,840 

7,350 

2,660

5,190

15,240 

10,650 

3,540

Silica 

(SiOa) 

ppm

21 

20 

20 

15 

18 

16 

18

23 

16 

22 

16 

17 

22 

27

23 

23 

20 

22

20

20 

22 

18

Equivalents per million

Calcium 

(Ca)

3.14 

3.00 

2.99 

1.80 

3.99 

4.79 

4.09

3.39 

3.59 

3.49 

1.30 

2.30 

2.50 

3.39

4.54 

2.54 

1.65 

2.35

2.50

2.05 

2.54 

2.40

Magnesium 

(Mg)

3.21 

3.12 

3.21 

1.73 

3.87 

5.10 

3.95

3.54 

4.11 

2.88 

.72 

1.48 

1.64 

2.71

3.87 

1.89 

1.07 

1.64

2.30

1.48 

1.61 

1.73

Sodium 

(Na)

Potassium 

(K)

8.70 

12.42 

10.63 

7.33 

12.54 

22.64 

13.92

13.08 

18.84 

11.69 

3.08 

6.74 

7.64 

11.49

16.53 

10.51 

4.85 

9.75

10.97

4.60 

7.23 

6.32

iicaroonate 

HC03)

4.28 

4.49 

4.75 

4.00 

3.80 

4.10 

3.79

3.97 

3.65 

4.06 

3.10 

3.49 

3.39 

3.65

4.00 

3.98 

2.85 

3.80

3.46

3.15 

3.82 

3.05

Sulfate 

(S04 )

5.06 

6.25 

5.66 

3.48 

8.93 

12.57 

8.74

7.02 

8.43 

6.77 

.85 

3.29 

4.04 

6.37

9.18 

5.54 

2.25 

5.14

6.10

2.52 

3.71 

4.21

Chloride 

(Cl)

5.64 

7.76 

6.35 

3.30 

7.61 

15.79 

9.36

8.97 

14.38 

7.19 

1.13 

3.67 

4.23 

7.50

11.56 

5.30 

2.34 

4.68

6.15

2.40 

3.98 

3.13

Fluoride

(F)

0.05 

.04 

.06 

.05 

.04 

.05 

.04

.04 

.05 

.04

.03 

.05 

.05

.06 

.05 

.04 

.05

.04

.05 

.05 

.05

Nitrate 

(N03)

0.02 

.00 

.01 

.03 

.02 

.02 

.03

.01 

.03 

.00 

.02 

.04 

.07 

.02

.14 

.07 

.09 

.07

.02

.01 

.02 

.01

a Sum of determined constituents, 

b Residue on evaporation.
Aug. 1-3, 5, 10 -

Aug. 4, 6-9 

Aug. 11-12 

Aug. 13-15 

Aug. 25-31 

Sept. 9-12, 19 

Total or 

weighted average -

2,290

97ft

Qcn

305

CO'1

QQO

359

c 141, 800

15

91

on

on

on

i R

15

18

2.35 

3 no

1.70

2 

on

3 

on

1.40

4.09

2.20

1.56

3 91

1.15

1.56

3 19

on

3.29

1.48

6.29

19 11

2

017

5.29

13.64

4.40

9.9S

6.39

2.82

3 A4

2 7Q

3

nc

4.11

2 1Q

2.98

3.41

3.87

6

I7O

1

017

3

9Q

9 1Q

2 97

8.37

3.23

3.44

7

QC

1

10

2

7A

7.05

1 Q7

5.92

3.41

.04 

.05

.07

.06

.05

.04

0.04

.03 

.05

.06

.05

.05

.07

.02

0.04

c 143,200 acre feet above gaging station.

ARKANSAS RIVER BASIN Continued 

CANADIAN RIVER NEAR WHITEFIELD, OKLA.

LOCATION. At gaging station at bridge on State Highway 2, 5$ miles upstream from Snake C

north of Whitefield, Haskell County. 

DRAINAGE AREA. 47,576 square miles. 

RECORDS AVAILABLE. Chemical analyses: September 1944 to February 1945, September 1946 

Water temperatures: September 1944 to February 1945, September 1946 to September 1951. 

EXTREMES, 1950-51.--Specific conductance: Maximum, 11,800 micromhos Dec. 31; minimum, 5

Percent sodium: Maximum, 74 Dec. 1-1,0, Jan. 4-7, Apr. 10; minimum, 49 May 19-20. 

EXTREMES, 1944-45, 1946-51. Specific conductance: Maximum, 13,100 micromhos Jan. 21-24, 

Percent sodium: Maximum, 80 Nov. 6-14, Dec. 21-23, 1947; minimum, 25 Sept. 12-15, 1944

REMARKS. Records of specific conductance of daily samples available in district office 

for water year October 1950 to September 1951 given in Water-Supply Paper 1211.

Chemical analyses, water year October 1950 to September 195

Date of collection

rv*t A in

cv*t 01 99

Oft 9r>,_9R __________

Runoff

(acrefeet)

91 °. on

51,610

8 

COQ

Q 993

Silica

(SiOa)

ppm

14

Equivalents per million

Calcium

(Ca)

4.84

A QQ

5.19

fi 14

Magnesium

(Mg)

2

na

2 99

3 nA

Sodium

(Na)

Potassium

(K)

8 7O

10 °°

19 R9

1 3 oc

in no

Bicarbonate

(HC03)

3 

no

3 

no

3 9A

Sulfate

(S04)

1.56

1 91

Chloride

(Cl)

10.21

14.10

1 A 711

9fl 73

Fluoride

(F)

0.02

Nitrate

(NO,)

.10

.07

.07

n7
ARKANSAS RIVER BASIN Continued

CANADIAN RIVER NEAR WHITEFIELD, OKLA. Continued

Chemical analyses, water yeai- October i960 to September 1951--Con

Date of collection

SV*+ *>ft *>Q 1Ql\1

rv»t 9Q.31 . ---

Nov. 1-10 -

Nov. 11-20 ------

Dec. 11-20 --- -

Jan. 4-7-' 

Jan. 8-10 

Jan. 11-13, 19-20 « 

Jan. 14-17 - --

Jan. 18 

Jan. 21-24 

Jan. 25-31 

Feb. 1-10 . 

Feb. 11-15 --- -

Feb. 16 «- - ---

Feb. 19-20 ....

Feb. 21-22, 27-28 

Mar. 1-2 

Mar. 3-4, 6-10 - 

Mar. 5 ..............

Mar. 11-13, 19-20 

Mar. 14-18 

Uoi* O1 OQ

Mar. 24-28 .

Mar. 29-31 ..........

Runoff 

(acrefeet)

6,902 

5,814 

17,650 

14,740 

12, 260

11,010 

12,140 

13,920 

4,467 

6,728 

5,831 

12,770 

16,640 

4,443 

9,620 

13,110 

16,750 

8,957 

1,741 

16,240 

102,300 

163,900 

97,030

18,600 

40, 130 

9,045 

138,900 

92,030 

20,930 

23,900 

11,310

Silica 

(SiO,) 

ppm

11 

8.6 

6.6

13 

11

Equivalents per million

Calcium

(Ca)

7.24 

7.64 

9.78 

11.38 

12.62

14.57 

16.12 

16.22 

15.17 

10.78 

18.11 

14.37 

10.38 

18.31 

12.88 

9.63 

11.58 

13.72 

9.93 

6.59 

3.34 

2.64 

1.90

3.59 

5.89 

7.78 

4.89 

2.40 

5.89 

6.99 

7.68

Magnesium 

(Mg)

3.54 

4.03 

4.69 

5.76 

6.41

6.58 

7.40 

7.40 

6.74 

5.43 

8.06 

6.74 

5.18 

7.98 

5.67 

4.60 

5.51 

6.50 

5.10 

3.45 

1.48 

1.23 

.90

1.89 

3.04 

4.03 

2.22 

1.23 

2.88 

3.54 

4.03

Sodium

(Na)

19 

25 

35.70 

45.22 

51.75

58 

62.18 

62.62 

59 

45 

74 

55 

35 

73 

46 

32 

38 

50 

33 

20 

9 

7 

4

9 

15 

23 

11 

5 

16 

22 

25

Potassium 

(K)

72 

20 

0.59 

.46 

.79

71 

.82 

.82 

85 

44 

64 

58 

25 

35 

74 

.24 

.46 

.83 

.95 

.79 

.58 

.15 

.94

.02 

.93 

.65 

.64 

.43 

.70 

.08 

.48

Bicarbonate 

HC03)

3.57 

3.23 

3.10 

3.69 

3.29

3.93 

4.46 

4.38 

4.20 

3.74 

4.03 

3.67 

4.06 

2.70 

3.57 

4.13 

4.10 

3.70 

3.59 

2.43 

1.62 

1.75 

1.54

1.95 

2.59 

3.21 

2.10 

1.64 

2.92 

2.92 

2.84

Sulfate 

(S04)

1.14 

1.17 

1.14 

1.17 

1.12

1.06 

1.10 

1.12 

1.31 

1.46 

1.69 

1.77 

1.48 

1.69 

1.85 

2.23 

1.98 

1.83 

1.90 

1.21 

.75 

.58 

.52

.96 

1.94 

1.75 

.83 

.56 

1.21 

1.46 

1.60

Chloride 

(Cl)

25.72 

32.43 

45.13 

58.10 

67.12

74.74 

79.53 

81.23 

76.15 

56.41 

95.04 

71,07 

45.13 

95.04 

59.79 

40.05 

49.36 

65.43 

43.43 

27.14 

11.99 

8.80 

5.64

11.56 

20.31 

30.46 

15.79 

6.82 

21.29 

28.20 

32.72

Fluoride

(F)

0.01 

.02 

.00

.00 

.00

--

Nitrate

(NO,)

0.07 

.04 

.01 

.03 

.05

.13 

.14 

.10 

.10 

.04 

.05 

.18 

.14 

.21 

.08 

.06 

.11 

.09 

.06 

.05 

.04 

.09 

.04

.03 

.03 

.04 

.03 

.04 

.05 

.03 

.03
Ani* 1 A, Q ....

Apr. 5, 8 

Apr. 10 

Apr. 11-12, 15-16 

Apr. 13-14, 17-20 

Apr. 21, 28-30 

Apr. 22-23 

May 1, 6-7 

May 2, 9-10 

May 4 - 

May 5 

May 11-12 

May 13-14 

May 15-17 

May 18 

May 19-20 

May 21-25, 28-31 

May 26-27, 29-30 

June 11-12 

June 13, 16, 19-20 

June 14-15, 17-18 

June 21, 25-26, 28-29 

June 22-24, 27, 30 

July 1-2, 5 

July 3-4 

July 6-10 

July 11-19 

July 20 

July 21-26, 28, 31 

July 27, 29-30 

18,370 

10, 890 

22,390 

3,967 

13,530 

16,130 

17,770 

25, 590 

15,150 

13,650

21,680 

19,300 

24,020 

17,000 

13,230 

8,271 

5,117 

7,240 

2,182 

196,800 

251,900 

85,130

98, 120 

10,510 

58,510 

154,700 

213,200 

225,300 

99,610 

102, 500

41,140 

38,020 

56,550 

70, 690 

6,605 

49,470 

22,850

16

8.98

9.53

3.84

11.83

9.18

7.54

5.99

3.44

7.64

9.53

4.94

3.49

3.89

7.24

6.19

3.99

5.09

6.59

8.43

3.99

4.59

3.49

3.64

5.94

4.19

3.54

2.60

2.10

2.64

2.99

3.79

2.64

4.69

3.89

4.79

4.69

6.59

4.44

4.60

1.64

5.76

4.77

4.11

3.12

1.64

3.62

4.60

2.47

1.89

2.06

3.70

2.80

2.22

2.83

3.54

4.60

2.14

2.14

1.73

1.56

2.55

1.89

1.40

1.07

.79

1.32

1.40

2.06

1.40

2.55

1.89

2.30

2.30

3.21

31.64

36.58

11.68

49.02

36.15

27; 60

19.06

10.23

28.95

36.47

14.48

9.13

11.37

26.07

16.95

10.10

13. 5S

21.09

30.25

5.83

8.87

5.69

7.08

16.61

8.90

7.79

4.33

3.31

4.75

5.84

7.76

4.91

12.21

8. 26 1 . 23

13.66

10.40

19.88

1

2.66

2.15

1.70

2.13

2.34

2.41

2.38

1.67

1.90

1.92

2.48

2.38

2.72

a2. 15

b2.76

2.85

2.84

2.46

2.82

3.03

2.82

2.44

2.61

c2. 61

2.66

2.26

2.05

1.87

2.23

2.23

2.36

1.95

2.36

2.77

d2.72

2.77

2.62

1.42

1.10

1.00

1.79

1.14

1.50

1.19

.75

.96

.92

.83

.79

.98

.90

1.00

.96

.98

.96

.90

2.85

2.10

1.87

1.58

1.71

1.83

1.12

1.06

.79

1.29

1.44

1.90

1.52

1.67

1.87

2.19

1.94

1.71

40.89

47.38

14.38

62.61

46.54

35.25

24.54

12.83

37.23

47.66

18.47

11.28

13.54

33.84

22.00

12.41

17.83

27.78

39.48

6.06

10.58

6.54

8.04

20.73

10.44

9.31

4.85

3.50

5.16

6.54

9.31

5.42

15.37

9.36

15.79

12.64

25:24

a Includes 0.07 equivalents per million of carbonate (CO,), 

b Includes 0.17 equivalents per million of carbonate (CO,).

:o9

.08 

.08 

.08 

.08 

.09 

.06 

.06 

.12 

.10

.11 

.06 

.08 

.12 

.18 

.09 

.08 

.06 

.08 

.02 

.10 

.06

.05 

.05 

.05 

.04 

.04 

.04 

.03 

.02

.04 

.06 

.05

.04 .04 

.05 

.04 

.11

c Includes 0.33 equiv

d Includes 0.20 equiv
ARKANSAS RIVER BASIN Continued 

CANADIAN RIVER NEAR WHITEFIELD, OKLA. Continued

Chemical analyses, water year October 1950 to September 1951--Continued

Date of collection

Aug. 1-10, 1951 

Aug. 11-13 

Aug. 14-17, 19 

Aug. 21-22, 25 

Sept 21-23, 27, 30 -- 

Sept. 24-25, 28-29 

Sept. 26 

Total or 

weighted average --

Runoff 

(acrefeet)

41,830 

13,960 

8,991 

3,505 

3,527 

2,104 

3,146 

1,190 

9,580 

7,359 

5,357 

27,730 

17,410 

16,460 

7,041 

5,649 

962

3,326,623

Silica 

(SiOa) 

ppm

15

-

Calcium 

(Ca)

4.29 

3.29 

5.54 

6.54 

5.84 

6.94 

7.88 

9.28 

10.43 

5.34 

4.29 

3.69 

5.19 

3.09 

4.09 

6.04 

7.28

4.44

Magnesium 

(Mg)

1.97 

1.89 

2.55 

3.62 

3.45 

3.62 

4.03 

4.77 

'5.43 

2.63 

2.38 

1.89 

2.38 

1.64 

1.81 

2.55 

3.21

2.14

Sodium

(Na)

10.48 

9 

17. 

23 

18. 

24 

27. 

36 

41 

20 

14 

13 

20 

11 

13 

20 

27

11

Equivalents per million

Potassium 

(K)

0.25 

20 

36 

71 

97 

06 

84 

87 

42 

56 

94 

55 

14 

75 

47 

66 

05

70

Bicarbonate 

(HC03)

2.82 

2.26 

2.59 

2.44 

2.74 

2.79 

2.75 

2.67 

2.24 

1.79 

1.77 

1.49 

1.36 

1.48 

1.66 

1.66 

1.80

2.39

Sulfate 

(S04)

1.81 

.29 

.50 

.42 

.35 

.31 

.40 

1.35 

1.12 

.75 

.77 

.54 

.62 

.42 

.46 

.58 

.71

1.35

Chloride 

(Cl)

11.99 

10.77 

21.29 

29.90 

24.11 

30.46 

35.54 

46.82 

53.87 

25.95 

19.04 

17.06 

25.66 

14.52 

17.20 

26.93 

34.97

14.38

Fluoride

(F)

0.04

-

Nitrate 

(N03)

0.03 

.06 

.07 

.11 

.06 

.06 

.06 

.08 

.05 

.04 

.03 

.04 

.07 

.06 

.05 

.08 

.06

0.05
RED RIVER BASIN

RED RIVER AT DENISON DAM NEAR DENISON, TEX.

LOCATION. Immediately below dam on Red River, 1J miles upstream from Shawnee Creek, 1} 

northwest of Denison, Grayson County, and 3 miles upstream from gaging station near C

DRAINAGE AREA. 38,290 square miles above dam, 38,330 square miles above gaging station.

RECORDS AVAILABLE. Chemical analyses: May 1944 to September 1951. 

Water temperatures: October 1945 to September 1951.

EXTREMES, 1950-51. SpecifIc conductance: Maximum, 1,740 micromhos May 31; minimum, 1,2

Percent sodium: Maximum, 56 Oct. 1-31, Jan. 1-31, May 1-31; minimum, 52 July 1-31, Au

EXTREMES, 1944-51. Percent sodium: Maximum, 59 July 3-10, 1944; minimum, 31 Nov. 1-10, 

REMARKS. Values reported for dissolved solids concentrations are residue on evaporation

daily samples available in district office at Austin, Tex. Discharge records for gag

water year October 1950 to September 1951 given in Water-Supply Paper 1211. No appre

station except during periods of heavy local rains.

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct 1 31 1950

Nov. 1-30 

Jan. 1-31, 1951 

 c<Av. f OQ

A4a XT 1 ^ 1

July 1-31 

Total or 

weighted averageRunoff 

(acrefeet)

493,700 

174,400

184, 200 

177,700

183,500 

143,500

124,400 

853,900

1,545,000 

837,400

191,800 

152,500

5,062,000

Silica 

(SiOa ) 

ppm

12 

11

11 

8.8

10 

10

13 

11

11 

12

14 

14

11

Calcium 

(Ca)

4.09 

4.19

4.49 

4.49

4.54 

4.59

4.49 

4.59

4.94 

4.29

4.09 

3.84

4.54

Magnesium 

(Mg)

1.64 

1.97

1.89 

2.06

1.89 

1.89

2.14 

1.89

2.38 

2.14

1.81 

1.73

2.06

Sodium 

(Na)

Equivalents per million

Potassium 

(K)

7.37 

7.05

7.40 

8.19

7.76 

7.83

7.82 

8.23

8.61 

6.88

6.39 

6.23

7.78

Bicarbonate 

(HCOS)

2.02 

2.10

2.10 

2.20

2.20 

2.23

2.39 

2.49

2.44 

2.23

2.18 

2.18

2.31

Sulfate

(SO,)

3.56 

3.68

3.83 

4.06

3.93 

4.02

4.00 

3.68

4.31 

3.71

3.39 

3.27

3.89

Chloride 

(Cl)

7.47 

7.39

7.84 

8.46

8.04 

8.04

8.04 

8.52

9.17 

7.33

8.71 

8.35

8.18

Fluoride 

(F)

Nitrate 

(NOS)

0.05 

.04

.01 

.02

.02 

.02

.02 

.02

.01 

.02

.03 

.02

0.02
RED RIVER BASIN Continued

WASHITA RIVER NEAR TABLER, OKLA.

LOCATION.--At gaging station at county highway bridge, 1 mile downstream from Little Wash

County, and 7| miles upstream from Winter Creek. 

DRAINAGE AREA. 4,760 square miles. 

RECORDS AVAILABLE.--Chemical analyses: September 1946 to September 1951.

Water temperatures: September 1946 to September 1951. 

EXTREMES, 1950-51.--Specific conductance: Maximum, 2,160 micromhos July 30; minimum

Percent sodium: Maximum, 24 Aug. 1-10; minimum, 1 May 17-20, 24-25. 

EXTREMES, 1946-51.--Specific conductance: Maximum, 2,560 micromhos Feb. 26-27, 1947

Percent sodium: Maximum, 35 Oct. 21-29, 1948: minimum, 1 Aug. 16, 1950, May 17-20, 24-

REMARKS.--Records of specific conductance of daily samples available in district office a

for water year October 1950 to September 1951 given in Water-Supply Paper 1211.

383 

min

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct. 1-10, 1950 

Oct. 11-20 

Oct. 21-31 

Nov. 21-30 

Dec. 1-10 

Dec. 21-31 

Tan 1 1ft 1QR1

Jan. 11-20 

Jan. 21-31 - 

Feb. 1-10 

Feb. 11-20 

Feb. 21-28 

Mar. 1-10 

Mar. 11-20 

Mar. 21-31 

Runoff 

(acrefeet)

5,994 

4,425 

4,259 

3, 584 

3,862 

4,257

4,253 

4,828 

5,064 

5,863 

5,094 

4,433

4,528 

5,825 

6,847 

5,730 

6,276 

5,014

Silica 

(SiO,) 

ppm

24

23 

21

21

20 

19 

18

18 

21

Equivalents per million

Calcium 

(Ca)

8.13 

7.74 

9.98 

9.83 

10.33 

11.53

10.98 

11.53 

11.43 

10.73 

11.33 

11.58

11.28 

10.98 

10.53 

11.43 

10.58 

11.48

Magnesium 

(Mg)

4.28 

4.85 

4.85 

5.18 

5.10 

5.10

4.85 

4.85 

4.85 

4.36 

4.85 

4.85

4.93 

4.52 

4.44 

5.51 

4.60 

5.43

Sodium

(Na)

3.22 

3. 

3.78 

3.83 

3. 

3.78

. 4. 

3.61 

3. 

3.35

 - 2. 

3.78

2. 

3.52 

2. 

2. 

3.35 

2.

Potassium 

(K)

0.12 

66 

.10 

. 17 

56 

.15

00 

.08 

42 

.18 

92 

.15

97 

.16 

54 

68 

1 .16 

72

Bicarbonate 

(HCO-,)

3.70 

3. 58 

4.88 

4.77 

5.15 

6.33

6.05 

6.10 

5.88 

5.54 

5.83 

5.96

5.13 

5.55 

4.82 

4.95 

5.11 

5.00

Sulfate 

(S04)

9.37 

9.93 

10.70 

10.87 

10.76 

10.99

10.99 

10.93 

11.06 

10.45 

10.85 

11.53

11.16 

11.08 

10.72 

12.35 

10.95 

11.99

Chloride 

(Cl)

2.45 

2.71 

2.88 

2.93 

3.05 

2.96

2.74 

2.74 

2.71 

2.34 

2.37 

2.62

2.82 

2.54 

1.92 

2.26 

2.12 

2.60

Fluoride

(F)

0.03

.03 

.02

.02

.03 

.02 

.02

.02 

.02

Nitrate 

(NO,)

0.04 

.03 

.04 

.03 

.03 

.02

.05 

.06 

.05 

.06 

.05 

.05

.07 

.06 

.05 

.06 

.05 

.04
Apr. 1-10 ----- ~

Apr. 11-20 

Anr> 91 93 in

Anr> 94 9Q

May 1-2 .... 

May 3-10 .. 

May 11-16 

May 17-20 

Man 91 93

Mav 94 9^

May 28-31 

June 11-12, 14-15 

July 1-10 

July 11-20 

July 21-24, 26-30 

Aug. 1-10 

Aug. 11-20 

Aug. 21-31 

Qant 1 7 Q

Qont ft

Sept. 10-20 

Sept. 21-30 «- ---

Total or 

weighted average -

4,272 

3,925 

2,936 

2,267 

4,165 

4,861 

2,884 

117, 700 

86, 080 

26, 480 

11, 190 

14, 300

21,030' 

21, 120 

43, 890 

36, 670 

12,000 

8,688 

8,331 

16, 420 

8,214 

7,111 

1,676

4,050 

3,901 

3,751 

1,785 

488 

11,920 

3,447

585,688

19

26 

24

--

10.03 

10.18 

11.48 

11.88 

6.29 

10.43 

11.53 

4.19 

3.19 

5.24 

6.74 

. 7.93

7.68 

6.44 

3.99 

5.84 

5.84 

4.29 

8.28 

6.69 

7.93 

9.33 

6.89

5.79 

8.98 

9.18 

7.19 

4.49 

4.49 

5.59

6.14

5.02 

4. 85 

3.86 

5.02 

2.30 

4.28 

4.85 

1.23 

1.15 

1.97 

2.63 

3.12

3.45 

2.38 

1.15 

1.81 

2.22 

1.56 

3.62 

4.11 

5.26 

5.76 

3.95

4.03 

4.77 

5.10 

5.59 

3.45 

2.30 

2.55

2.55

3.1 

4.09 

2. E 

3.£

.e

2.9 

2.8 

.0 

.1 

.0 

.2 

.8

1.7 

.9 

.6 

.4 

1.1 

.7 

2.1 

2.9 

3.70 

3.7 

2.2

3.0 

3.70 

3.6 

3.4 

2.1 

1.4 

1.8

7 

.17 

>1 

4 

1 

2 

3 

7 

5 

7 

2 

9

6 

8 

3 

4 

4 

5 

2 

3 

.14 

2 

4

7 

.14 

5 

2 

4 

4 

6

1.26

3.79 

4.11 

3.80 

a 5. 08 

b2.34 

2.82 

b3.64 

cl.85 

1.72 

dl.97 

e2.84 

b3. 57

3.08 

d2.54 

1.95 

f 2.31 

C3.05 

e2.51 

3.97 

2.67 

3.06 

3.77 

3.38

2.56 

3.20 

4.03 

3.15 

3.31 

2.39 

3.08

2.77

11.74 

12.08 

12.16 

12.80 

6.06 

12.39 

12.74 

3.25 

2.46 

4.85 

6.00 

7.29

8.47 

6.14 

3.35 

5.18 

5.10 

3.39 

8.56 

9.26 

11.20 

11.97 

7.66

7.97 

11.43 

11.06 

10.22 

5.50 

4.60 

5.77

6.02

2.65 

2.96 

1.86 

2.82 

.68 

2.37 

2.76 

.31 

.27 

.40 

.68 

1.02

1.27 

1.04 

.40 

.51 

.99 

.62 

1.44 

1.80 

2.45 

3.02 

1.97

2.31 

2.68 

2.79 

2.79 

1.13 

1.18 

1.10

1.07

.02

.02 

.02

-

.04 

.03 

.03 

.04 

.12 

.05 

.07 

.08 

.05 

.06 

.07 

.06

.07 

.08 

.07 

.09 

.06 

.08 

.05 

..00 

.05 

.05 

.07

.05 

.05 

.05 

.04 

.14 

.06 

.05

0.06

a Includes 0. 57 equivalents per million of carbonate (CO3). 

b Includes 0.23 equivalents per million of carbonate (CO3). 

c Includes 0.13 equivalents per million of carbonate (CO3).

d Includes 0.10 equivalents pe

e Includes 0.17 equivalents pe

f Includes 0.07 equivalents pe
Part 8. WESTERN GULF OF MEXICO BASINS

SABINE RIVER BASIN 

SABINE RIVER NEAR RULIFF, TEX.

LOCATION. At gaging station at bridge on State Highway 235, 2.4 miles north of Ruliff, N

City-Southern Railway bridge, 4.5 miles downstream from Cypress Creek, and at mile 40. 

DRAINAGE AREA. 9,440 square miles. 

RECORDS AVAILABLE. Chemical analyses: October 1945 to September 1946, October 1947 to S

Water temperatures: October 1947 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 663 micromhos June 22; minimum, 67.2 

Percent sodium: Maximum, 73 Nov. 14-20, Nov. 21-25, 27-30; minimum, 54 July 7-31, Aug. 

EXTREMES, 1945-46, 1947-50. Percent sodium: Maximum, 86 Dec. 26-27, 1948; minimum, 27 J

REMARKS. Values reported for dissolved solids are residue on evaporation unless noted ot

daily samples available in district office at Austin, Tex. Records of discharge for w

given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct. 1-10, 1950 

Ant 1 1 9fl

Ant 91 91

Nov. 9-13, 26 

Nov. 21-25, 27-30 

Dec. 1-10 

Dec. 11-20 

r\o/t 91 91

Jan. 1-3, 20-31, 1951 

Jan. 4-10 

Jan. tl-19 

Feb. 1-10 

tpoH 11 1 Q

Feh 20-28 - 

Runoff 

(acrefeet)

53, 930 

27, 090 

30, 190 

26, 120 

20,410 

24, 870 

31,930

38, 680 

36, 560 

35,500 

133, 200 

180, 900 

142, 200 

88, 540 

136, 700 

ififi finn

Silica 

(Si02 ) 

ppm

13 

16 

16 

15 

14 

15 

16

17 

16 

20 

14 

7.5 

12 

15 

12 

11

Calcium

(Ca)

0.49 

.50 

.45 

.50 

.28 

.44 

.37

.46 

.39 

.41 

.38 

.12 

.22 

.39 

.38 

.41

Magnesium 

(Mg)

0.33 

.27 

.21 

.37 

.14 

.25 

.22

.33 

.32 

.30 

.36 

.18 

.24 

.33 

.31 

.37

Sodium

(Na)

Equivalents per million

Potassium 

(K)

1.60 

1.04 

.84 

1.28 

1.17 

1.86 

1.63

1.91 

1.65 

1.58 

1.54 

.54 

.78 

1.2'8 

1.20 

1.26

Bicarbonate 

(HC03)

0.48 

.79 

.67 

.69 

.38 

.49 

.48

.49 

.44 

.46 

.33 

.16 

.23 

.26 

.26 

.23

Sulfate

(S04)

0.33 

.20 

.16 

.18 

.27 

.27 

.20

.33 

.21 

.20 

.38 

.19 

.29 

.42 

.44 

. 56

Chloride 

(Cl)

1.55 

.79 

.65 

1.27 

.93 

1.78 

1.55

1.86 

1.69 

1.61 

.1.58 

.48 

.70 

1.30 

1.18 

1.24

Fluoride 

(F)

Nitrate 

(NO,)

0.02 

.02 

.02 

-.01 

.02 

.01 

.01

.02 

.02 

.02 

.00 

.01 

.02 

.02 

.01 

.01

a Sum of determined constituents.
Mar. 1-10 

iur~_ -I I on

Mar. 21-28 

Mar. 29-30, Apr. 1-3 

Mar. 31, Apr. 4-10 

Apr. 11-20 - 

May 1-5, 9, 15-20 

May 6-8, 10-14 

Mov 91 ^1

June 21-30, July 1-6 -

Tulu 7 <I1 

Cant i in

Sept. 11-19, 24-27 

Sept. 20-23, 28-30 

Total or 

weighted average --

210, 000 

174, 500 

80, 470 

175, 500 

319, 500 

161, 500 

66, 780

131,200 

153, 800 

63, 790 

34, 060 

36, 320 

139, 100 

93, 300

46, 680 

9,430 

42, 880 

32,480

3,167,000

13 

16 . 

17 

10 

12 

16 

18

18 

14 

18 

22 

21 

18 

19

22 

23 

18 

11

14

.46 

.60 

.60 

.20 

.27 

.38 

.49

.55 

.36 

.70 

.65 

.70 

.70 

.80

.60 

.48 

.38 

.24

0.42

.35 

.42 

.40 

.21 

.27 

.33 

.37

.37 

.28 

.45 

.45 

.40 

.37 

.34

.34 

.27 

.24 

.15

0.31

1.27 

1.47 

1.62 

.87 

.90 

1.15 

1.55

1.81 

1.20 

2.07 

1.45 

1.66 

1.30 

1.35

1.17 1 0.06 

1.32 

1.42 

.75

1.26

.39 

.62 

.56 

.16 

.23 

.36 

.56

.54 

.36 

.67 

.75 

.82 

.90 

1.00

.90 

.82 

.57 

.31

0.43

.56 

.56 

.54 

.42 

.46 

.52 

.52

.48 

.33 

.60 

.42 

.38 

.40 

.25

.18 

.16 

.17 

.12

0.40

1.13 

1.30 

1.50 

.68 

.73 

.96 

1.33

1.69 

1.13 

1.92 

1.35 

1.55 

1.04 

1.18

1.07 

1.07 

1.27 

'.68

1.13

0.02

.01 

.01 

.02 

.02 

.02 

.02 

.01

.01 

.01 

.02 

.02 

.02 

.03 

.06

.03 

.02 

.03 

.03

0.02

a Sum of determined constituents.
NECHES RIVER BASIN 

NECHES RIVER AT EVADALE, TEX.

LOCATION. At gaging station at bridfje on U. S. Highway 96, 200 feet upstream from Gulf, Co

Evadale, Jasper County, 600 feet downstream from Mill Creek, 15 miles upstream from Vill

DRAINAGE AREA. 7,908 square miles.

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

Water temperatures: October 1947 to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 370 micromhos Aug. 29; minimum, 53.7 mi

Percent sodium: Maximum, 68 Dec. 1-10, Jan. 1-10; minimum, 49 July 11-20.

EXTREMES, 1947-51. Percent sodium: Maximum, 74 Dec. 21-31, 1948; minimum, 14 June 4-18, 

REMARKS. Values reported for dissolved solids are residue on evaporation unless noted othe

of daily samples available in district office at Austin, Tex. Records of discharge for 

given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 195

Date of collection

Oct. 1-3, 8-10, 1950 - 

Oct 4 7

f\-L 1 1 OA

Oct. 21-31 

Nov. 11-20 

Nov. 21-30 

Dec. 1-10 

Dec. 11-20 

Jan. 11-20 

Jan. 21-31 

Feb. 1-10 

Feb. 11-19 

Feb. 20-28 . _.-.

Runoff 

(acrefeet)

13, 760 

10, 610 

15,950 

16, 860 

16, 800 

18, 980 

24, 440

25,650 

27, 510 

26, 240 

56, 870 

49,210 

44, 570

44, 790 

44, 970

ft3 040

Silica 

(SiO,) 

ppm

16 

17 

17 

17 

17 

16 

14

17 

15 

18 

14 

14 

15

16 

15

14

Equivalents per million

Calcium 

(Ca)

0.45 

.55 

.45 

.43 

.46 

.37 

.33

.40 

.36 

.40 

.29 

.34 

.39

.42 

.45 

.42

Magnesium 

(Mg)

0.29 

.34 

.41 

.40 

.31 

.36 

.31

.32 

.37 

.31 

.27 

.30 

.34

.36 

.37 

.37

So- Potasdium slum 

(Na) (K)

1.26 

1.78 

1.40 

1.50 

1.39 

1.34 

1.34

1.54 

1.21 

1.30 

1.21 

1.16 

1.34

1.56 

1.18 

1.50

Bicarbonate 

(HCO,)

0.49 

.51 

.52 

.57 

.61 

.57 

.44

.56 

.48 

.52 

.38 

.34 

.38

.36 

.33 

.23

Sulfate 

(S04)

0.38 

.38 

.35 

.25 

.23 

.21 

.23

.23 

.33 

.27 

.35 

.46 

.50

.48 

.56 

.64

Chloride 

(Cl)

1.10 

1.75 

1.35 

1.50 

1.30 

1.27 

1.30

1.47 

1.13 

1.21 

1.02 

.99 

1.18

1.50 

1.10 

1.41

Fluoride 

(F)

0.01 

.01 

.00 

.00 

.01 

.00 

.00

.01 

.00 

.00 

.02 

.02 

.02

.00 

.00

Nitrate 

(N03)

0.02 

.02 

.02 

.01 

.02 

.02 

.01

.00 

.00 

.00 

.01 

.00 

.00

.02 

.02 

.01

a Sum of determined constituents.
Mar. 1-10 

Mar. 11-20 

Mar. 21-28 

Mar. 29-31, Apr. 7-10 

Apr. 1-6 - -- 

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 11-20 - 

July 21-31- 

Aug. 1-10 - 

Aug. 11-20 

Aug. 21-31

Sept. 1-20~ 

Sept. 21, 30 

Sept. 22-25, 27 ....

Sept. 26, 28-29 

Total or 

weighted average 

82,810

66,390

49, 510

121,400

170,000

90,470

40,640

43,200

30,250

36,020

26,040

29. 870

30. 660

35,190

24, 520

18,230

10,170

6,190

5,640

10, 690

4,330

17,550

7,320

1,478,000

15

17

19

15

12

18

18

18

15

12

14

18

18

20

19

26

23

25

30

27

20

6.0

11

16

.48 

.50 

.55 

.36 

.24 

.49 

.60

.55 

.49 

.55 

.65

.60

.55 

.60 

.70 

.65 

.65 

.65

.60 

.14

0.44 0.35

1.34

1.58

1.45

.83

.71

1.39

1.48

1.35

.87

1.06

1.29

1.72

1.47

1.26

1.66

1.76

1.91

1.64

1.70 0.01

.32

1.26

.20 

.36 

.48 

.34 

.30 

.33 

.46

.52 

.49 

.61 

.77 

.92 

.87

.84

.85

.95

1.05

1.25

1.25

1.08 

.77 

.18 

.26

0.44

.69 

.73 

.69 

.44 

.33 

.75 

.77

.69 

.42 

.44 

.40 

.38 

.38

.29 

.27 

.29 

.23 

.21 

.23

.18 

.23

0.48

1.33

1;41

1.30

.68

.51

1.18

1.27

1.13

.73

.90

1.16

1.35

1.50

1.30

1.44

1.52

1.55

1.52

1.21

1.41 

.93 

.21 

.51

1.10

.00

0.01

.02 

.0

.0

.0

.02 

.0

.00

.0

.04 

.03 

.02 

.02 

.02

.02 

.02 

.0

.02 

.0

.02

.0

.0

.0

.0

0.0

a Sum of determined constituents.
SAN JACINTO RIVER BASIN 

SAN JACINTO RIVER NEAR HUFFMAN, TEX.

LOCATION At Sheldon Pumping Plant of City of Houston, 5i miles downstream from gaging 

Beaumont, Sour Lake & Western Railway bridge, 0.4 mile downstream from confluence of 

southwest of Huffman, Harris County.

DRAINAGE AREA. 2,791 square miles at gaging station.

RECORDS AVAILABLE. Chemical analyses: October 1945 to July 1948, December 1948 to Sep

Water temperatures: January 1949 to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 890 micromhos Feb. 17; minimum, 160 

Percent sodium: Maximum, 76 Sept. 21-22, 25-30; minimum, 57 Apr. 1-10.

EXTREMES, 1945-51. Percent sodium: Maximum, 79 Nov. 16, 18, 26, 1947; minimum, 18 Jun

REMARKS. Values reported for dissolved solids are residue on evaporation unless noted 

conductance of daily samples available in district office at Austin, Tex. Total acr

station. Records of discharge for water year (jlctober 1950 to September 1951 given i

inflow between gaging station and sampling point except during periods of heavy loca

Chemical analyses, water year October 1950 to September 19

Date of collection

Oct. 1-10, 1950 

/V»t 1 f 9ft

rift 91 31

Nov. 1-10 

Nov. 11-20 

Dec. 1-10 

n««» 71 ^i .

Jan. 1-10, 1951 

Jan. 11-20 

.Tan 21-31 

Runoff 

(acrefeet)

4,420 

2,650 

2,800 

2,620 

2,620 

2,680

2,940 

2,900 

3,450 

5,470 

4,170

4 070

Silica 

(SiOa) 

 ppm

18 

20 

19 

17 

16 

15

18 

19 

18 

16 

16

If!

i Equivalents per million

Calcium

(Ca)

0.95 

.90 

1.10 

1.30 

.85 

1.15

1.10 

1.00 

1.10 

1.05 

1.15 

1.15

Magnesium 

(Mg)

0.37. 

.31 

.39 

.34 

.37 

.47

.48 

.42 

.54 

.34 

.35 

.36

Sodium

(Na)

1. 

2. 

2. 

2. 

3. 

4.

3. 

3. 

2. 

3. 

4. 

2.

Potassium 

(K)

96 

56 

86 

92 

24 

20

88 

12 

84 

54 

30 

99

Bicarbonate 

(HCO3)

1.00 

1.20 

1.13 

1.08 

1.05 

1.08

1.06 

1.03 

1.05 

.97 

1.00 

1.08

Sulfate 

(S04)

0.15 

.13 

.12 

.10 

.09 

.16

.12 

.12 

.10 

.14 

.14 

.11

Chloride

(CD

2.09 

2.42 

3.07 

3.36 

3.30 

4.57

4.26 

3.38 

3.33 

3.81 

4.65 

3.36

Fluoride 

(F)

Nitrate 

(NO,)

0.04 

.02 

.02 

.02 

.01 

.01

.01 

.00 

.00 

.02 

.01 

.01
Feb. 10-19 

Feb. 20-28 

Mar. 1-10 

Mar. 11-20 

Mar 21 27 --

Mar 28-31 --

Apr. 1-10 

Apr. 11-20 

Apr. 21-30 

May 1-10 

May 11-20 

May 21-31 --

June 1-10 

June 11, 13-14 

June 12, 15-16 

June 17-20 

June 21-30 

July 1-10 

July 11-19 

Aug. 1-10 

Aug. 11-20 

Aug. 21-31 

Sept. 11-20 

Sept. 21-22, 25-30 -

Qant 91 94

weighted average -

3 7Qft

4,900

7,770 4 1Qft

3 740

4,710

27 430 4 OOft

3,510 3 41ft 3 91ft

3 330

4,030

1,110

1,290

1 91ft

2 

9 on

I

Qqn

1,740

2 Ann

1,480

1,170

1,410

1,470

4,900

9,780 

2Qcn

171,200

1 a

17

17

157

0

on

99

1Q

20

91

91

19

17

11 

21

00

20

23

00

99

99

99

99

1ft

18

17

1.10

1.35

1.30

1.40

1.35

.80

1.25

1.30

1.40

1.30

1.40

1.30

1.05

1.00

1.00

1.10

1.20

1.20

1.15

1.10

1.10

1.10

1.20

.95

.50

1.05

.37

.40

.35

.36

.30

.24

.37

.29

.32

.30

<?n

.40

.78

.53

.45

.43

.37

.38

.41

.41

.37

.40

.38

.50

.43

0.37

4.17

4.56

2.75

2.68

3.46

3.59

2.90

2.62

2.95

3.17

3.14

2.56

--

3.86

3.81

3.48

3.72

3.61

3.77

3.70

3.42

2.62

2.96

2.74

1.02

1.05

1.15

1.23

1.44

1.38

.80

1.20

1.25

1.34

1.33

1.33

1 t4

1.00

1.03

.54 

1.10

1.10

1.15

1.26

1.16

1.18

1.25

1.20

1.25

.97

.95 

.41

i.oe

.12

.13

.18

.16

.12

.10

.18

.16

.12

.10

.12

.11

.13

--

.16

.11

.12

.14

.08

.08

.09

.08

.12

.11

0.13

4.48

4.96

3.10

2.93

3.58

3.67

1.58

2.14

3.07

2.82

3.10

3.47

3.38

3.22

2.71

.96 

3.95

4.09

4.09

3.67

3.95

3.84

3.89

3.89

3.67

2.96

2.79 

.93

2.96

.01

.01

.02

.02

.01

.02

.03

.02

.04

.03

.02

.04

.01

.05

.04

.04 

.04

.03

.03

.02

.03

.02

.01

.02

.01

.02

.03

.02

0.02

a Sum of determined constituents.
BRAZOS RIVER BASIN

BRAZOS RIVER AT RICHMOND. TEX.

LOCATION. At gaging station at bridge on U. S. Highway 59 in Richmond, Fort Bend County, a

New Orleans Railroad bridge, and at mile 93.

DRAINAGE AREA. 44,050 square miles, of which 9,240 square miles is probably noncontributin

.RECORDS AVAILABLE. Chemical analyses: October 1945 to September 1951.

Water temperatures: November 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 2,540 micromhos Sept. 4; minimum, 321 m

Percent sodium: Maximum, 64 Sept. 1-10; minimum, 30 June 21-25.

EXTREMES, 1945-51. Percent sodium: Maximum, 76 Dec. 3-4, 1945; minimum, 18 Aug. 27-31, 1

REMARKS. Values reported for dissolved solids concentrations less than 1,000 ppm are resid

more than 1,000 ppm are sum of determined constituents unless noted otherwise. Records 

available in district office at Austin, Tex. Records of discharge for water year Octobe

Supply Paper 1212.

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct. 1-10, 1950 

/"In* 11 O1

Oct. 22-31 

Nov. 1-10 

Nov. 11-20 

Dec. 1-10 

Dec. 11-20 ----- 

Dec. 21-26 

Dsc. 27-31 

Jan. 1-10, 1951 

Jan. 11-20 

Runoff 

(acrefeet)

72, 670 

51, 290 

25,090 

19, 760 

18, 680 

15,630

14, 790 

15, 070 

13, 880 

9,160 

18, 630 

16, 640 

21,060

Silica 

(SiO.) 

ppm

9.5 

11 

12 

11 

11 

13

14 

12 

9.5 

9.0 

8.4 

11 

9.5

Equivalents per million

Calcium 

(Ca)

3.99 

6.19 

5.54 

5.19 

5.19 

5.24

4.99 

5.29 

4.79 

5.49 

5.19 

5.39 

5.09

Magnesium 

(Mg)

1.15 

1.64 

1.73 

1.73 

1.81 

1.89

1.81 

1.81 

1.56 

1.81 

1.73 

1.73 

1.64

Sodium 

(Na)

6-1 

9.83 

8.22 

7.39 

7.17 

7.35

7.00 

7.04 

6.00 

7.87 

7.26 

7.83 

8.39

Potassium 

(K)

6 

0.04 

.03 

.08 

.16 

.09

.12 

.13 

.10

.10 

.02 

.06

Bicarbonate 

(HCO,)

2.06 

2.47 

3.23 

3.56 

3.85 

4.20

4.02 

4.51 

3.93 

3.83 

3.92 

3.82 

3.61

Sulfate

(sou

2.85 

5.41 

4.16 

3.62 

3.48 

3.60

3.16 

2.96 

2.91 

3.73 

3.35 

3.46 

3.44

Chloride 

(Cl)

6.63 

10.10 

7.90 

7.19 

6.99 

8.99

6.57 

6.80 

5.75 

7.76 

6.99 

7.56 

7.95

Fluoride 

(F)

0.01 

.02 

.02 

.02 

.02 

.02

.01 

.01 

.01 

.01 

.01 

.02 

.01

Nitrate 

(NO,)

0.05 

.01 

.01 

.01 

.01 

.00

.02 

.02 

.01 

.00 

.00 

.03 

.02
Feb. 1-10- - 

Feb. 11-19 

Feb. 20-28 - 

Mar. 1-10 

Mar. 11-20 

Mar. 21-26, 31 

Mar. 27-30 

Apr. 1, 14-20 

Apr. 2-13 - 

Apr. 21-30 

May 1-10 ~ 

May 11-20 - 

May 21-31 -

June 1, 4-10 

June 2-3, 11-20 

June 21-25 - --- - 

June 26-30 . 

July 1-9 

July 10-20 ...........

July 21-25, 30-31-----

July 26-29 

Aug. 1-10 

Aug. 11-20 

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

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 - - 

Total or 

weighted average 

22,040

18,720

26,140

19,090

13, 850

12,660

15,610

18, 670

51,470

4,500

18, 670

31, 970

23, 220

50,800'

113, 700

56,450

27,090

23,170

18,800

9,780

7,560

21,120

16,660

14,120

11,180

38,940

28, 240

1,027,000

8.8

14

13

11

13

15

13

18

16

19

14

14

16

16

16

17

17

16

15

19

17

13

12

14

11

10

15

13

5.84

5.09

4.79

4.39

4.69

4.39

2.99

3.59

2.10

4.14

3.64

3.09

3.69

2.89

2.10

2.00

2.30

2.89

4.69

4.59

3.39

6.04

6.14

5.99

6.09

5.34

3.19

3.99

1.73

1.73

1.48

1.40

1.64

1.81

1.23

1.23

.71

1.56

1.56

1.15

1.32

.81

.51

.58

.82

.77

1.56

1.81

1.15

2.30

2.30

2.22

2.38

1.97

.81

1.32

9.52

8.96

7.91

6.61

6.17

6.09

4.17

3.44

2.00

4.30

5.26

5.00

6.04

3.65

1.39

I.09 

2.35 

3.26 

9.22 

9.61 

5.70

13.13

13.57

13.91

14.83

II.87 

4.91

6.04

.01 

.07 

.07 

.06 

.06

.04 

.05 

.04 

.13

.08 

.06

.10 

.12 

.03

.01 

.04 

.07 

.04 

.04 

.08

0.06

3.18

3.02

2.85

3.11

3.97

3.77

2.46

3.54

2.03

4.39

3.41

2.29

2.56

2.25

2.03

1.97

2.05

2.39

2.20

2.02

2.34

1.92

2.08

2.18

1.97

1.93

1.93

3.71

2.98

2.62

2.39

1.44

1.62

1.15

1.71

2.12

2.23

2.69

1.69

.85

.71

1.00

1.46

4.04

4.37

2.50

5.79

5.66

5.70

6.06

4.71

2.14

2.79

9.53

8.86

7.73

6.26

5.98

6.15

4.29

3.13

1.61

3.78

5.13

4.79

5.92

3.53

1.16

1.02

2.43

3.24

9.08

9.65

5.42

13.68

14.10

14.24

15.17

12.41

5.05

6.04

.01 

.01 

.01 

.01 

.01 

.03 

.02

.02 

.02 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02

0.02

.02 

.02 

.03 

.02 

.02 

.03 

.01

.02 

.04 

.01 

.01 

.02 

.02

.06 

.08 

.06 

.04 

.01 

.01 

.04 

.02

.06 

.04 

.04 

.03 

.03 

.05

0.04

a Sum of determined constituents, 

b Residue on evaporation.
COLORADO RIVER BASIN

COLORADO RIVER AT ROBERT LEE, TEX.

LOCATION. At gaging station at bridge on State Highway 208 in Robert Lee, Coke County, hal

DRAINAGE AREA. 15,770 square miles, of which 11,600 square miles is probably noncontributi

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

Water temperatures: October 1947 to September 1951. 

Sediment records: January 1949 to September 1951. 

EXTREMES, 1950-51.--Specific conductance: Maximum, 9,530 micromhos Apr. 5; minimum, 371 mi

Percent sodium: Maximum, 79 June 5; minimum, 46 June 3, 4.

EXTREMES, 1947-51. Percent sodium: Maximum, 79 Aug. 15, 1949, June 5, 1951; minimum, 17 J

REMARKS. Values reported for dissolved solids concentrations less than 1,000 ppm are resid

more than 1,000 ppm are sum of determined constituents unless noted otherwise. Records 

available in district office at Austin, Tex. Records of discharge for water year Octobe

Supply Paper 1212.

Chemical analyses, water year October 1950 to September 19

Date of collection

Oct. 11-20 

Oct. 21-31 

Dec. 11-20 - -

Dec. 21-31 

Jan. 1-10, 1951 

Jan. 11-20 

Feb. 11-19 . 

Mar. 1-10 

Mar. 11-20 

Mar. 21-28 

May 99-31 __ - _ _

Runoff 

(acrefeet)

313 

177 

88 

33 

3.8 

0 

0

5.0 

13 

9.3 

7.3 

13 

10

12 

18 

35 

18 

7.7 

.8

Rfi

Silica 

(SiOa) 

ppm

12 

12 

9.8 

12 

14 

14 

13

11 

8.4 

8.8 

6.8 

5.6 

5.1

3.7 

6.2 

4.1 

4.7 

6.2 

5.0 

R fi

Equivalents per million

Calcium 

(Ca)

2.94 

3.89 

5.09 

5.79 

6.19 

5.84 

5.79

6.09 

5.79 

5.89 

5.29 

7.34 

8.43

9.48 

10.33 

12.48 

12.97 

12.28 

9.98

17 49.

Magnesium 

(Mg)

1.32 

1.81 

2.22 

2.63. 

2.96 

2.96 

2.96

3.37 

3.12 

3.12 

3.21 

3.70 

3.87

4.28 

4.61 

4.85 

5.51 

5.35 

5.10

fi Q1

Sodium

(Na)

Potassium 

(K)

8.47 

11.27 

13.33 

15.19 

15.98 

15.59 

15.36

15.66 

13.89 

14.30 

15.50 

18.49 

19.46

19.97 

19.17 

21.67 

25.86 

27.26 

25.44

37 4ft

Bicarbonate 

(HCO3)

2.11 

2.31 

2.36 

2.34 

2.57 

2.70 

2.77

2.84 

2.92 

2.97 

2.11 

2.03 

1.97

2.38 

1.90 

1.57 

1.34 

1.21 

1.05

1 3«

Sulfate 

(S04)

3.29 

4.39 

5.52 

6.60 

7.04 

6.68 

6.45

6.77 

6.06 

6.18 

6.66 

9.22 

10.56

11.33 

12.16 

14.30 

15.22 

14.47 

12.76

9.1 94

Chloride

(CD

7.28 

10.21 

12.75 

14.67 

15.51 

15.00 

14.89

15.51 

13.82

14. Iff 

15.23 

18.28 

19.23

20.02 

20.02 

23.13 

27.78 

28.77 

25.95

3ft 3fi

Fluoride

(F)

Nitrate 

(N03)

0.05 

.06 

.01 

.00 

.01 

.01 

.00

.00 

.00

.00 

.00 

.00 

.00

.00 

.03 

.00 

.00 

.02 

.00 

ns
Apr. 1-10 

Apr. 11-20 

Apr. 21-24 

Apr. 25-30 

May 1-17 

May 18, 19 

May 19, 20-28 

May 29-31 

June 1-2, 3, 6-10 

June 3 

June 3, 4 - 

June 3, 5- - -- 

June 5- - ---- -

June 11, 13, 29-30 

June 12, 16, 24-28 

June 14-15, 16 

June 16, 17-23 

July 1-2, 3 

July 3 

July 4-10 

July 11-14 

July 15-20 

July 21-31 

Aug. 1-11 

Aug. 12, 25-28 

Aug. 13-14, 23, 24,

29-31 ----- - 

Aug. 15-22, 23 

Sept. 1-10 - 

Sept. 11-19 

Sept. 20-30 

Total or 

weighted average 

20

,2

0

25

1.2

1,850

7,930

90

1,830

569

3,710

1,440

1,310

96

1,450

278

5,390

17

5,370

7,450

91

18

5.6 0

3,950

6,960

3,820

142

2170

54,840

5.1

4.8

3.1

3.4

3.6

6.8

17

15

15

13

17

24

21

15

16

13

16

17

29

18

23

17

19

17

13

15

13

15

12

14

21.66

19.46

12.28

24.55

20.76

22.36

2.30

3.49

3.64

3.24

1.90

4.74

6.49

4.09

3.69

4.29

2.45

3.79

4.69

1.50

2.30

3.79

4.89

6.74

1.45

1.'95 

4.09 

2. 50 

4.04 

5.54

3.44

9.54

9.29

6.74

9.95

8.47

9.70

.75

1.15

1.56

.99

.56

1.97

3. 12

1.73

1.40

2.55

.81

1.48

2. 55

.64

1.15

1.73

2.38

3.54 

.49

.72

2. 14

1.23

1.73

2.71

1.48

61.75 |

56.95

36.51

55.09

53.99

48.17

2.67

5.44

10.87

4.43

2.10

16.90

35.19

11.89

7.78

16.56

4.89

8.87

25.79

4.41

6.67

9.94

13.64

18.65

3.01

4.55

11.72

6.99

11.09

14.58

9.70

1.25

.93

.90

.95

1.13

1.61

1.57

1.56

1.95

1.61

1.75

2.21

3.24

1.88

1.92

1.74

1.87

1.97

15.85

2.13

2.00

2.13

1.93

1.52

1.77

1.84

1.56

2.08

2.00

1.93

3.23

27.06

24.98

15.97

29.98

25.40

27.27

1.56

2.98

3.87

2.56

.85

4.62

7.70

4.46

3.33

5.87

1.75

3.81

1.33

1.54

2.69

4.31

6.20

8.79

1.31

1.89

5.41

2.98

4.93

6.79

3.19

62.89

59.79

38.64

58.66

56.69

51.33

2.54

5.50

10.21

4.43

1.86

16.70

33.84

11.34

7.59

15.74

4.48

8.32

15.85

2.82

5.42

8.97

12.75

18.56

1.81

3.44

10.94

5.64

9.93

14.10

8.18

.02

.02 

.05 

.04

.04 

.06 

.10 

.08 

.02 

.03 

.03 

.05 

.05 

.04 

.00 

.06 

.01 

.05 

.03

.06 

.06

.05 

.04 

.02 

.00 

.01

0.05

a Residue on evaporation.
COLORADO RIVER BASIN Continued 

COLORADO RIVER AT AUSTIN, TEX.

LOCATION. At raw-water intake of Austin City Water, Plant,.4i miles upstream from gagi

southeast edge of Austin, Travis County, at Montopolis Bridge on U. S. Highway 183, 

3.8 miles downstream from Waller Creek, 5 miles downstream from Barton Creek, and a

DRAINAGE AREA. 38,160 square miles, of which 11,900 square miles is probably noncontr

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

Water temperatures: October 1947 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 543 micromhos Mar. 29, Sept. 4, 6; 

Percent sodium: Maximum, 37 May 1-31; minimum, 24 Oct. 1-31. 

EXTREMES, 1947-51. Specific conductance: Maximum, 566 micromhos Mar. 1-31, 1948; min

Percent sodium: Maximum, 37 May 1-31, 1951; minimum, 24 Oct. 1-31, 1950.

REMARKS. Values reported for dissolved solids concentrations are residue on evaporati

daily samples available in district office at Austin, Tex. Records of discharge fo

1951 given in Water-Supply Paper 1212. No appreciable inflow between sampling poin

periods of heavy local rains.

Chemical analyses, water year October 1950 to September 19

Date of collection

Oct. 1-31, 1950 

Dec. 1-31 

Jan. 1-31, 1951 

Feb. 1-28 

Mar. 1-31 

Apr. 1-30 

May 1-31 

July 1-31 

Aug. 1-31 

Sept. 1-30 

Total or 

weighted average -

Runoff 

(acrefeet)

35,410 

41,490

45,120 

50, 790

35,710 

14,470

44,890 

107, 600

98, 330 

120, 900

121,900 

47,950

764, 600

Silica 

(Si02 ) 

ppm

9.2 

7.7

9.2 

10

8.2 

5.4

11 

11

11 

13

12 

12

11

Equivalents per million

Calcium 

(Ca)

2.05 

2.00

2.00 

2.20

2.15 

2.15

2.00 

1.95

1.90 

1.80

2.00 

2.00

1.95

Magnesium 

(Mg)

1.32 

1.32

1.32 

1.32

1.23 

1.32

1.40 

1.15

1.32 

1.81

1.32 

1.32

1.40

So- Potasdium slum 

(Na) (K)

1.09 

1.30

1.48 

1.52

1.73 

1.62

1.58 

1.79

1.66 

1.27

1.88 

1.91 0.09

1.61

Bicarbonate 

(HCO,)

2.69 

2.64

2.69 

2.88

2.92 

2.85

2.72 

2.72

2.59 

2.46

2.56 

2.52

2.64

Sulfate 

(S04)

0.60 

.64

.71 

.69

.67 

.73

.75 

.69

.71 

.75

.77 

.81

0.73

Chloride

(Cl)

1.13 

1.30

1.38 

1.44

1. 50 

1.47

1.47 

1.47

1.52 

1.64

1.83 

1.89

1.55

Fluoride

(F)

0.01 

.01

.01 

.01

.02

.01

.02

.02

.02

.02 

.02

0.02

Nitrate 

(N03)

0.02 

.02

.01 

.01

.02 

.02

.02 

.02

.03 

.01

.01 

.01

0.02
COLORADO RIVER BASIN Continued 

COLORADO RIVER AT WHARTON, TEX.

LOCATION. At gaging station at bridge on U. S. Highway 59 in Wharton. Wharton County. 1

New Orleans Railroad bridge, and 12 miles upstream from Jones Creek and at mile 67. 

DRAINAGE AREA. 41,150 square miles, of which 11,900 square miles is probably noncontrib

RECORDS AVAILABLE. Chemical analyses: April 1944 to September 1951.

Water temperatures: October 1945 to September 1948, March 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 649 micromhos Aug. 19; minimum, 283 

Percent sodium: Maximum, 39 Sept. 1-30; minimum, 21 June 1-5, 10, 13.

EXTREMES, 1944-51. Percent sodium: Maximum, 39 July 11-20, 1948, Sept. 1-30, 1951; min

REMARKS. Values reported for dissolved solids concentration are residue on evaporation, 

specific conductance of daily samples available in district office at Austin, Tex. R

October 1950 to September 1951 given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct. 1-31, 1950 

Nov. 1-30 

T\f>n I Ql

Jan. 1-31, 1951 

Feb. 1-28 

Mar. 1-31 

Apr. 1-30 

Mov 1 91

June 1-5, 10, 13 

June 6-9,11-12,14-30

July 1-31 

Aug. 1-31 

Sept. 1-30 

Total or 

weighted averageRunoff 

(acrefeet)

40, 680 

44,300

50, 750 

51,810

55, 180 

50, 990

33, 660 

50, 990

19,700 

101,000 

45,430

46, 570 

76,000

646,000

Silica 

(SiOa) 

ppm

10 

15

5.5 

5.6

5.6 

9.6

14 

10

17 

15 

13

15 

13

11

Equivalents per million

Calcium 

(Ca)

2.54 

2.50

2.50 

2.50

2.45 

2.69

2.45 

2.00

2.00 

2.20 

2.10

2.15 

2.00

2.30

Magnesium 

(Mg)

1.32 

1.48

1.32 

1.32

1.32 

1.23

1.23 

1.07

.55 

1.15 

1.32

1.32 

.99

1.23

So- Potasdium slum 

(Na) (K)

1.47 

1.36

1.63 

1.66

1.64 

2.05

1.55 

1.82

.68 

1.47 

1.81

1.93 

1.92

1.65

Bicarbonate 

(HCO,)

3.33 

3.28

3.28 

3.28

3.28 

3.70

3.11 

2.72

2.13 

2.74 

2.79

2.75 

2.52

2.97

Sulfate 

(S04)

0.67 

.69

.71 

.69

.69

.77

.83 

.71

.58 

.69

.75

.77 

.71

0.71

Chloride 

(Cl)

1.30 

1.33

1.44 

1.49

1.41 

1.47

1.24 

1.44

.48 

1.35 

1.64

1.86 

1.64

1.44

Fluoride 

(F)

0.01 

.02

.01 

.01

.01 

.02

.02 

.02

.01 

.02

0.02

Nitrate 

(NO,)

0.02 

'.02

.01 

.01

.02 

.03

.03 

.02

.04 

.02 

.03

.01 

.02

0.02

a Sum of determined constituents.
GUADALUPE RIVER BASIN 

GUADALUPE RIVER AT VICTORIA, TEX.

LOCATION. At gaging station at bridge on U. S. Highway 59 in Victoria, Victoria County, 

Orleans Railroad bridge, and 10 miles upstream from Coleto Creek. 

DRAINAGE AREA. 5,311 square miles. 

RECORDS AVAILABLE. Chemical analyses: October 1945 to September 1946, October 1948 to S

Water temperatures: November 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 1,820 micromhos June 24; minimum, 279 

Percent sodium: Maximum, 58 June 23-24; minimum, 24 June 4, 6, 15.

EXTREMES, 1945-46, 1948-51. Percent sodium: Maximum, 67 July 23-24, 1950; minimum, 18 M

REMARKS. Values reported for dissolved solids concentrations are residue on evaporation 

of specific conductance of daily samples for October 1945 To September 1951 available 

daily chloride determinations also available. Records of discharge for water year Oct

Supply Paper 1212.

Chemical analyses, water year October 1950 to September 1

Date of collection

r\f+t 1 1ft 10*^0

Oct. 11-12, 21-31 

Oct. 13-20 - -

Nov. 1-10 -_ 

Dec. 21-31 

Jan. 1-10, 1951 -_- 

Jan. 11-20 -- _

Feb 11 19

Feb. 20-28 _-_ 

Mar. 1-10 _- _ 

Mar. 11-20 -_ _ 

Mar 5(1-31 __________

Runoff 

(acrefeet)

8,190 

8,790 

- 4, 820 

6,870 

6,620 

7,550

8,030 

7,740 

9,360 

7,590 

8,040 

8,540

7,590 

7,610 

8,300 

8,520 

7,450 

10 310

Silica 

(SiOs) 

ppm

16 

17 

20 

17 

14 

16

15 

13 

12 

11 

11 

13

12 

11 

11 

13 

16 

1R

Equivalents per million

Calcium

(Ca)

2.69 

2.79 

3.09 

2.79 

2.89 

3.04

2.84 

3.09 

3.29 

3.19 

2.99 

2.94

2.94 

2.69 

2.89 

3.19 

2.59 

7. RQ

Magnesium 

(Mg)

1.64 

1.64 

2.06 

1.64 

1.64 

1.73

1.64 

1.73 

1.56 

1.64 

1.64 

1.64

1.64 

1.81 

1.73 

1.89 

1.89 

1 SO

Sodium

(Na)

2.30 

2.17 

3.70 

1.87 

1.83 

1.83

1.78 

2.26 

2.00 

1.91 

2.13 

2.17

2.26 

2.52 

2.52 

3.09 

2.44 

 >. 17

Potassium 

(K)

0.00 

.06 

.06 

.03 

.06

.11 

.12 

.10

.05 

.03

.04 

.03 

.04 

.04 

.01 

00

Bicarbonate 

(HCO,)

3.47 

3.67 

3.56 

3.80 

3.90 

4.03

3.92 

4.03 

4.24 

4.21 

3.85 

3.87

3.80 

3.43 

3.65 

3.88 

3.46 

3 83

Sulfate 

(S04)

0.65 

.69 

1.06 

.65 

.69 

.67

.65 

.67 

.62 

.65 

.69 

.67

.71 

.71 

.71 

.79 

.73 

71

Chloride

(Cl)

2.48 

2.28 

4.29 

1.75 

1.78 

1.81

1.83 

2.57 

2.14 

2.03 

2.23 

2.23

2.37 

2.74 

2.76 

3.55 

2.74 

9. 4O

Fluoride

(F)

0.01 

.02 

.02 

.02 

.02 

.02

.01 

.01 

.01 

.02 

.01 

.01

.01 

.01 

.01 

.01 

.02 

05!

Nitrate 

(NOS)

0.02 

.01 

.01 

.01 

.01 

.02

.04 

.02 

.04 

.04 

.04 

.03

.03 

.05 

.05 

.04 

.05 

nfi

a Sum of determined constituents.
Apr. 1-5, 9-10 ------

Apr. 6-8 -----------

Apr. 11-20 - 

Apr. 21-30 

May 1-10--- 

May 11, 17-18 - 

May 12-16, 19-20- 

May 21-31-- 

June 1-3, 5, 7-10, 14,

16 - 

June 4, 6, 15------

June 11-13, 17-20 - 

June 21-22, 25-30- 

June 23-24 ------

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 -

Total or

weighted average --

8,250

3,090

8,540

7,200

11,400

2,460

6,800

14,020

81, 580

30,450

13,470

8,040

2,110

6,910

6,000

6,140

3,600

3,760

4,080

3,610

9,500

9,230

392,200 16

3.29

3.59

2. 59

3.09

2.99

2.79

3.69

2.79

2.30

1.70

2.89

3.04

4.39

2.84

2.64

2.30

2.20

2.35

2.10

2.40

2.35

2.10

2/64

1.81

2.14

1.81

1.89

1.81

1.64

1.81

1.40

.90

.54

.90

1.32

1.97

1.40

1.48

1.48

1.56

1.56

1.56

1.56

1.32

1.15

1.40

2.44

5.09

3.00

2.74

2.13

3.69

5.70

1.96

1.87

.71

5.09

2.44

8.78

1.91

2.13

2. 17

2.26

2.13

2.39

2.44

2.09

1.57

2.26

.01

.00 

.00 

.00

.00 

.00

.00

.12

.11 

.06 

.07

.02 

.03 

.05 

.02 

.01 

.00

0.03

4.00

3.61

3.05

3.79

3.80

2.85

3.02

3.59

2.54

2.00

1.95

3.21

2.82

3. 57

3.47

3.11

3.10

3.26

2.98

3.24

3.16

2.84

3.20

.73- 

.96 

.77 

.73 

.65 

.77 

.87 

.62

. 50 

.29 

.69 

.71 

1.21 

.60 

.60 

.62

.62 

.60 

.67 

.69 

.58 

.50

0.62

2.79

6.20

3.44

3.07

2.34

4.46

7.25

2.00

2.12

.62

6.29

2.82

11.25

2.09

2.28

2.26

2.28

2.14

2.43

2.48

2.03

1.49

2.51

.02 

.02 

.02 

.02 

.02 

.02

.02

.02 

.02 

.03 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02

0.02

.04 

.05 

.06 

.02 

.02 

.02 

.03 

.05

.04 

.04 

.03 

.03 

.05 

.02 

.00 

.03

.03 

.03 

.02 

.02 

.02 

.04

0.03

a Sum of determined constituents.
NUECES RIVER BASIN 

NUECES RIVER NEAR MATHIS, TEX.

LOCATION. At intake tower at Lake Corpus Christ! near Mathis, San Patricio County, 0.

near Mathis, which is at bridge on V. S. Highway 59, 200 feet downstream from Texas 

4 miles southwest of Mathis. 

DRAINAGE AREA. 16,660 square miles. 

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

Water temperatures: October 1947 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 893 micromhos May 13, 16; minimum, 

Percent sodium: Maximum, 50 May 1-24; minimum, 36 June 1-30, July 1-31, Aug. 1-31. 

EXTREMES, 1947-51. Percent sodium: Maximum, 59 June 1-30, 1948; minimum, 28 Apr. 1-2

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

available in districe office at Austin, Tex. Records of discharge for water year O

in Water-Supply Paper 1212. No appreciable inflow between sampling point and gagin

Chemical analyses, water year October 1950 to September 195

Date of collection

Oct. 1-31, 1950 

Nov. 1-30 

Dec. 1-31 

Jan. 1-31, 1951 

Feb. 1-28 

Apr. 1-30 

May 25-31 

July 1-31 

Aug. 1-31 

Qoni 1 19

Sept. 13-30 

Total or 

weighted averageRunoff 

(acrefeet)

13,290 

3,550

2,930 

2,610

2,500 

2,620

2,860 

15,420 

44,210

137, 900 

4,120

4,140 

1,520 

184, 500

422, 200

Silica 

(SiOa) 

ppm

24 

21

22

28

23 

19

21 

22 

20

24 

25

29 

30 

19

21

Equivalents per million

Calcium 

(Ca)

2.50 

2.54

2.64 

2.74

2.89 

2.94

3.14 

3.44 

1.60

1.85 

2.25

2.50 

2.70 

1.60

1.85

Magnesium 

(Mg)

0.52 

.42

.40 

.51

.54 

.52

.57 

.58 

.27

.40 

.34

.46 

.45 

.27

0.34

Sodium 

(Na)

Potassium 

(K)

1.84 

1.98

2.17 

2.22

2.14 

2.28

2.54 

4.06 

1.55

1.27 

1.48

1.70 

2.00 

1.31

1. 48

Bicarbonate 

(HCO,)

3.11 

3.15

3.36 

3.51

3.59 

3.62

3.90 

4.10 

2.20

2.26 

2.72

3.11 

3.44 

2.03

2.31

Sulfate 

(S04)

0.60 

.64

.71 

.69

.71

.77

.77 

1.04 

.46

.54 

.62

.62 

.69 

.54

0.56

Chloride 

(Cl)

1.10 

1.13

1.13 

1.27

1.27 

1.^3

1.58 

2.93 

.73

.68 

.70

.87 

.99 

.56

0.76

Fluoride 

(F)

0.02

.02 

.01

.01

.01 

.02 

.02

~

Nitrate 

(NO,)

0.02 

.02

.00 

.00

.01 

.01

.00 

.01 

.04

.03 

.02

.03 

.01 

.02

0.02
RIO GRANDE BASIN

RIO GRANDE ABOVE CULEBRA CREEK NEAR LOBATOS, COL

LOCATION. Two and one-half miles south of.La Sauses, 7 miles downstream from Conejos Rive

near Lobatos, which is 7 miles downstream from Culebra Creek and 10 miles east of Lobat

DRAINAGE AREA. 7,700 square miles above gaging station (includes 2,940 square miles in cl

RECORDS AVAILABLE. Chemical analyses: October 1946 -to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 721 micromhos May 6; minimum, 224 micr

Percent sodium: Maximum, 46 Aug. 1-10; minimum, 25 Dec. 11-20.

EXTREMES, 1946-51. Specific conductance: Maximum, 1,070 micromhos July 26, 1948; minimum

Percent sodium: Maximum, 46 Oct. 11-20, 1946, Aug. 1-10, 1951; minimum, 16 Dec. 1, 3-10

REMARKS. Records of specific conductance of daily samples available in district office at 

dissolved solids concentrations are residue on evaporation. Discharge records for gagi

October 1950 to September 1951 .given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 19

Date of collection

Ocf. 1-10, 1950 

Oct. 11-20 

Oct. 21-31 

Nov. 21-30 -

Dec. 1-10 -- -

Dec. 11-20 

Dec. 21-31 -

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

Jan. 21-31 

Feb. 1-10 

Feb. 11-20 

Feb. 21-28 ,.

Mar. 1-10 

UQV* -1 1 on

Runoff 

(acrefeet)

1,270 

1,160 

1,350 

1,030 

2,480 

2,940

3,070 

4,970 

5,230 

5,290 

5,730 

6,150

5,120 

5,900 

4,840 

4,970 

3,300 

2,110

Silica

(sio,)

ppm

34

--

Equivalents per million

Calcium 

(Ca)

2.30 

2.35 

2.59 

2.99 

2.94 

2.00

1.95 

1.60 

1.80 

1.65 

1.60 

1.40

1.50 

1.35 

1.75 

1.75 

2.20 

2.59

Magnesium 

(Mg)

0.64 

.90 

.99 

1.07 

1.07 

.72

.67 

.57 

.60 

.60 

.50 

.44

.46 

.42 

.54 

.54 

.81 

.90

Sodium 

(Na)

1.87 

1.70 

1.96 

2.26 

2.13 

1.17

1.13 

.74 

.96 

.67 

.78 

.70

.74 

.70 

1.00 

.91 

1.35 

1.70

Potassium 

(K)

0.14

.16

Bicarbonate 

(HCO,)

2.41

2.05

Sulfate 

(SOJ

2.10

1.02

Chloride 

(CD

0.42

.18

Fluoride 

(F)

0.03

.02

Nitrate 

(NO,)

0.01

.02
RIO GRANDE BASIN Continued 

RIO GRANDE ABOVE CULEBRA CREEK NEAR LOBATOS, COLO. C

Chemical analyses, water year October 1950 to September 1951 C

Date of collection

Apr. 1-10,1951 

Apr. 11-19 

Apr. 20-30 

May 1-10 

May 11-21 

May 23, 28-31 

July 11-20 

July 21-31 ~

Aug. 11-20 

Aug. 21-31 

Sept. 1-10 

Sept. 11-20 ----- 

Sept. 21-30 

Total or 

weighted average 

Runoff 

(acrefeet)

2,440 

1,880 

1,300 

372 

361 

569 

1,950

718 

373 

549 

395 

a79 

aO 

aO

a!6 

a9 

480 

682 

474 

383

79, 980

Silica 

(SiOa ) 

ppm

36 

37

-

Equivalents per million

Calcium 

(Ca)

2.59 

2.10 

3.19 

3.09 

2.54 

2.79 

1.60

1.90 

2.94 

2.00 

1.85 

1.90 

1.95 

1.85

1.70 

1.60 

1.55 

1.65 

1.60 

1.70

1.85

Magnesium 

(Mg)

0.90 

.77 

1.23 

1.23 

.99 

.99 

.54

.75 

1.15 

.75 

.71 

.68 

.82 

.79

.77 

.72 

.57 

.61 

.55 

.67

0.64

Sodium

(Na)

1.96 

1.39 

2.87 

2.83 

2.30 

2.48 

1.04

1. 52 

2.57 

1.61 

1.48 

1.61 

2.04 

2.04

2.13 

1.65 

1.70 

1.57 

1.48 

1.78

1.17

Potassium 

(K)

0.14

.16

Bicarbonate 

(HCO3)

2.61

2.80

Sulfate 

(SO,)

2.44

1.27

Chloride

(Cl)

0.45

.23

Fluoride

(F)

0.03

.04

Nitrate 

(NO,)

0.02

.01

a No flow at gaging station July 10-31, Aug. 1-3, 9-17.
RIO GRANDE BASIN Continued

RIO GRANDE AT OTOWI BRIDGE NEAR SAN ILDEFONSO, N. 

LOCATION. At gaging station in San Ildefonso Pueblo Grant 250 feet downstream from new 

San Ildefonso Pueblo, Santa Fe County, 2$ miles downstream from Rio Pojoaque and 7 m

DRAINAGE AREA. 14,300 square miles (includes 2,940 square miles in closed basin in nor

RECORDS AVAILABLE.--Chemical analyses: October 1946 to September 1951. 

Water temperatures: October 1948 to September 1951. 

Sediment Records: October 1947 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 1,230 micromhos, Aug. 26; minimum, 

Percent sodium: Maximum, 32 Oct. 1-10, 11-20; minimum, 18 Aug. 26. 

EXTREMES, 1946-51.--Specific conductance: Maximum, 1,230 micromhos, Aug. 26, 1951; min

Percent sodium: Maximum, 32 Sept. 11-18, 22-30, 1947; Oct. 1-10, 11-20, 1951; minimu

REMARKS. Records of specific conductance of daily samples available in district office 

for dissolved solids are sums of determined constituents. Records of discharge for 

given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct. 1-10, 1950 

Oct. 11-20 

Oct. 21-31 

Nov. 1-10 

Nov. 11-20 

Dec. 1-10 

T\&n 1 1 .on

Dec. 21-31 

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

Feb. 1-10 

Feb. 11-20 

Fph. 21 -9.R _ 

Runoff 

(acrefeet)

6,040 

5,350 

11,740 

5,530 

6,520 

9,070

7,770 

10,780 

10, 670 

10,020 

10,000 

11,320

10,250 

29,910

19 790

Silica 

(Si02 ) 

ppm

30 

27 

30 

32 

28 

30

29 

30 

29 

27 

28 

30

31 

23

74

Equivalents per million

Calcium 

(Ca)

2.25 

2.00 

2.50 

2.10 

2.25 

2.25

2.10 

2.05 

1.95 

2.00 

2.00 

1.95

2.05 

2.69

2 40

Magnesium 

(Mg)

0.74 

.70 

.82 

.74 

.77 

.79

.69 

.68 

.67 

.74 

.75 

.67

.67 

.99 

99

Sodium 

(Na)

1.39 

1.26 

1.09 

1.22 

1.30 

1.35

1.17 

1.04 

.96 

1.09 

1.09 

.96

1.00 

.91 

A3

Potassium 

(K)

Bicarbonate 

(HCOS)

2.93 

2.62 

2.62 

2.75 

2.87 

2.64

2.64 

2.47 

2.46 

2.52 

2.54 

2.41

2.54 

2.61

2 43

Sulfate 

(S04)

1.23 

1.10 

1.62 

1.15 

1.27 

1.48

1.15 

1.19 

1.06 

1.12 

1.08 

.98

1.02 

1.96

1.75

Chloride

(CD

0.28 

.28 

.24 

.27 

.31 

.34

.27 

.25 

.21 

.21 

.24 

.21

.21 

.13

.13

Fluoride

(F)

Nitrate

(NO,)

0.01 

.01 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01

.02 

.02 

.02
RIO GRANDE BASIN Continued

RIO GRANDE AT OTOWI BRIDGE NEAR SAN ILDEFONSO, N. HEX

Chemical analyses, water year October i960 to September 1951 C

Date of collection

Mar. 1-10, 1951 

Mar. 11-20 

Mar. 21-31 

Apr. 1-10 

Apr. 11-20 ----- 

Apr. 21-30. 

May 1-10 -

May 11-20 

May 21-31 

June 11-20 

July 1-10 

July 11-20 

July 21-31 

Aug. 1-10 - -----

Aug. 11-21 -

Aug. 22-25, 27-31 

Aug. 26 

Sept. 11-20 

Total or 

weighted average -

Runoff 

(acrefeet)

11,230 

9,730 

8,380

7,740 

7,000 

7,610 

7,940 

18,780 

23, 960

18,470 

14,340 

18,280 

16,660 

4,130 

12, 150

17,410 

4,310 

7,910 

1,330 

5,560 

3,910 

3,710

395,400

Silica 

(SiO,) 

ppm

30 

29 

28

29 

29 

26 

26 

22 

. 21

20 

19 

20 

21 

25 

23

23 

26 

25 

15 

25 

27 

27

25

Equivalents per million

Calcium 

(Ca)

1.95 

2.00 

2.05

2.15 

2.15 

2.05 

2.05 

2.30 

2.10

1.85 

1.70 

1.65 

1.85 

2.20 

2.10

2.79 

2.10 

3.29 

8.89 

2.25 

1.85 

1.85

2.20

Magnesium 

(Mg)

0.72 

.55 

.67

.67 

.68 

.69 

.64 

.71 

.66

.55 

.50 . 

.47 

.48 

.60 

.59

.90 

.65 

.82 

2.47 

.76 

.66 

.67

0.72

Sodium

(Na)

0.96 

1.09 

1.17

1.26 

1.26 

1.00 

.91 

.74 

.74

.70 

.61 

.52 

.61 

1.13 

.87

.91 

1.09 

1.22

1.17 

1.09 

1.04

0.96

Potassium 

(K)

Bicarbonate 

(HCOS)

2.39 

2.46 

2.56

2.64 

2.61 

2.57 

2.54 

2.54 

2.26

2.02 

1.97 

1.88 

2.16 

2.82 

2.44

2,49 

2.72 

3.52 

3.51 

2.79 

2.64 

2.65

2.47

Sulfate 

(S04)

1.08 

1.12 

1.17

1.25 

1.29 

1.08 

.94 

1.23 

1.12

.94 

.81 

.73 

.79 

.98 

1.10

1.98 

1.02 

1.75 

10.12 

1.21 

.87 

.83

1.27

Chloride 

(Cl)

0.21 

.20 

.27

.27 

.31 

.27 

.27 

.18 

.11

.11 

.08 

.07 

.08 

.23 

.14

.14 

.23

'.28 

.23 

.24 

.25

0.19

Fiuoride 

(F)

Nitrate 

(NO,)

0.02 

.02 

.01

.01 

.01 

.01 

.02 

.02 

.02

.01 

.01 

.01 

.01 

.01 

.01

.03 

.01 

.02 

.01 

.02 

.01 

.00

0.01
RIO GRANDE BASIN Continued

RIO GRANDE (TIFFANY CHANNEL) AT TIFFANY, N. HEX.

LOCATION. At water-stage recorder at Atchison Topeka and Santa Fe Railway bridge at Tif

upstream from San Marcial.

DRAINAGE AREA. 27,700 square miles (includes 2,940 square miles in closed basin in nort

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

EXTREMES, 1950-51. Specific conductance:Maximum, 2,160 micromhos Aug. 24; minimum, 826 

Percent sodium: Maximum, 63 May 1-10; minimum, 34 Aug. 23-24. 

EXTREMES, April 1950 to September 1951. Specific conductance: Maximum, 2,340 micromhos 

Feb. 21, 1951.

Percent sodium: Maximum,'63 May 1-10, 1951; minimum, 34 Aug. 23-24, 1951. 

REMARKS. Records of specific conductance of daily samples available in district office 

reported for dissolved solids concentrations are residue on evaporation. Daily disch

published separately but is included in discharge records for water year October 1950

at San Marcial, given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 1951

Date of collection

Oct. 1-10, 1950 

riot 1 1 on

rw*t 01 31

Nov. 1-10 

Nov. 11-20 

Nov. 21-30 

Dec. 1-10 

T\fkft 1 1 on

Dec. 21-31 

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

TTtih 1 If)

Feb. 11-20 

Runoff 

(acrefeet)

80 

33

16 

8.7 

12 

71

88 

140 

201 

282 

377 

359

518 

1,080 

1,100

Silica 

(SiO,) 

ppm

Equivalents per million

Calcium 

(Ca)

.89 

.44 

.49 

.59 

.64 

5.14

5.04 

5.34 

5.14 

4.79 

4.89 

4.74

4.79 

4.39 

4.14

Magnesium 

(Mg)

1.48 

1.64 

1.73 

1.81 

1.89 

1.97

2.14 

2.22 

2.06 

2.47 

2.63 

2.06

2.14 

2.30 

1.81

Sodium 

(Na)

7.48 

7.65 

7.61 

8.39 

9.31 

9.04

9.26 

9.52 

9.13 

9.44 

9.83 

8.00

8.61 

7.78 

5.26

Potassium 

(K)

Bicarbonate 

(HCO,)

Sulfate 

(S04)

Chloride 

(Cl)

Fluoride

(F)

Nitrate 

(NO,)
RIO GRANDE BASIN Continued

RIO GRANDE (TIFFANY CHANNEL) AT TIFFANY, N. MEX. Cont

Chemical analyses, water year October 1950 to September 1951--Con

Date of collection

Mar. 1-10,1951 

Mar. 11-20 - -- -

Mar. 21-31 

Apr. 1-10 

Apr. 11-20 

Apr. 21-30 - 

May 1-10 

May 11-20 

July 1-10 

July 11-20 

July 21-31 

Aug. 1-10 

Aug. 11-20 

Aug. 21-22, 25-31 

Ana- 93 94

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 

Total or 

weighted averageRunoff 

(acrefeet)

732 

476 

508

740 

765 

730 

728 

698 

1,200

861 

573 

190 

73 

44 

12

230 

10 

1,250 

167

509 

66 

6.9

14, 930

Silica 

(SiO,) 

ppm

Equivalents per million

Calcium

(Ca)

4.59 

4.49 

4.49

4.79 

4.99 

5.19 

4.84 

4.99 

4.89

4.29 

4.49 

4.44 

4.44 

4.19 

4.19

5.19 

4.69 

6.94 

IZ87

4.99 

4.44 

4.39

4.99

Magnesium

\Mg)

2.06 

1.89 

1.97

2.14 

2.30 

2.30 

2.22 

2.30 

2.14

1.89 

1.73 

1.81 

1.97 

1.89 

1.73

1.89 

1.97 

2.30 

4.11

1.81 

1.89 

1.89

2.14

Sodium

(Na)

9.65 

8.61 

9.04

9.65 

11.31 

12.18 

12.18 

10.96 

10.52

8.70 

8.09 

8.78 

9.44 

9.35 

8.57

7.13 

8.78 

7.09 

8.78

7.35 

7.96 

7.35

9.00

Potassium 

(K)

iicaraonate 

HC03)

Sulfate

(SO,)

Chloride

(Cl)

Fluoride

(F)

Nitrate 

(N03 )
RIO GRANDE BASIN Continued 

RIO GRANDE AT SAN MARCIAL, N. MEX.

LOCATION. At gaging station in Pedro Armendaris Grant 33, at Atchison, Topeka & Santa Fe 

San Marcial, Socorro County.

DRAINAGE AREA.--27,700 square miles (includes 2,940 square miles in closed basin in northe

RECORDS AVAILABLE. Chemical analyses: July 1946 to September 1951. 

Water temperatures: January 1949 to September 1951. 

Sediment records: July 1946 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum. 2,150 micromhos May 7; minimum, 580 mi

Percent sodium: Maximum 65 May 1-10; minimum, 31 Aug. 24. 

EXTREMES, 1946-51. Specific conductance: Maximum, 2,470 micromhos Sept. 28, 1948; minimu

Percent sodium: Maximum, 65 May 1-10, 1951; minimum, 22 Nov. 21-22, 28-30, 1947; June 

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

available in district office in Albuquerque, N. Mex. Records of chemical analyses and 

been published in Water Bulletins of International Boundary Commission. Records of dis

September 1951 given in Water-Supply Paper 1212.

Chemical analyses, water year October I960 to September 19

Date of collection

Oct. 1-10, 1950 

Oct. 11-20 

Oct. 21-31 

Nov. 21-30 

Dec. 11-20 

Dec. 21-31 

Jan. 1-10, 1951 

Jan. 11-20 ----- 

Jan. 21-31 

Feb. 1-10 

Feb. 11-20 

Mar. 11-20 

Mar. 21-31 -

Runoff 

(acrefeet)

1,670 

442 

316 

165 

636 

2,980

4,670 

6,720 

8,530 

7,380 

8,150 

8,700

7,640 

19, 120 

18,380 

7,240 

736 

686

Silica 

(SiQ.) 

ppm

22 

35 

35 

37 

31 

27

25 

27 

28 

28 

24 

25

22 

22 

20 

30 

33 

33

Equivalents per million

Calcium 

(Ca)

6.59 

4.59 

4.59 

4.79 

5.39 

4.69

4.19 

3.89 

3.69 

3.65 

3.69 

3.84

3.54 

3.39 

3.09 

3.79 

4.69 

4.69

Magnesium 

(Mg)

2.14 

1.56 

1.56 

1.73 

2.06 

1.73

1.32 

1.32 

1.23 

1.23 

1.15 

1.15

1.07 

.99 

.99 

1.23 

1.64 

1.81

Sodium

(Na)

7.26 

7.44 

7.78 

8.44 

6.35 

4.57

3.44 

3.48 

2.91 

3.00 

3. 

3.

3. 

2. 

2. 

3.96 

8.31 

9.09

Potassium 

(K)

20 

99

23 

62

r

Bicarbonate 

(HC03)

4.46 

4.24 

4.20 

4.47 

4.62 

4.03

3.72 

3.65 

3.44 

3.46 

3.52 

3.70

3.31 

3.18 

2.82 

3.80 

4.64 

4.51

Sulfate 

(SOJ

8.76 

5.37 

5.23 

5.29 

6.06 

5.16

4.08 

3.68 

3.31 

3.44 

3.29 

3.54

3.27 

2.94 

2.64 

3.58 

5.12 

5.85

Chloride

(Cl)

3.02 

4.29 

4.79 

5.36 

3.33 

1.78

1.16 

1.33 

1.04 

1.21 

1.21 

1.72

1.24 

.85 

.62 

1.81 

4.60 

5.42

Fluoride 

(F)

Nitrate 

(NO,)

0.03 

.01 

.01 

.04 

.01 

.04

.04 

.03 

.02 

.03 

.02 

.02

.02 

.03 

.02 

.02 

.02 

.02
RIO GRANDE BASIN Continued

RIO GRANDE AT SAN MARCIAL, N. HEX. Continued 

Chemical analyses, water year October 1950 to September 1951 Co

Date of collection

Apr. 1-10,1951- ... 

Apr. 11-20 

Apr. 21-30 

May 1-10 

May 11-20 ---- - 

May 21-31 

June 1-10 ... 

Aug. 1-7 - 

Aug. 21-31 

Sept. 1-10 . .

Total or 

weighted average --

Runoff 

(acrefeet)

361 

117 

a 20 

a 17 

a 66 

a 301

b8.9 

887 

544 

10, 300 

c 1,270

118, 100

Silica 

(SiOa) 

ppm

35 

32 

31 

32 

29 

27

31 

23 

21 

19 

19

24

Equivalents per million

Calcium 

(Ca)

4.89 

5.04 

5.24 

4.94 

5.24 

5.29

4.44 

8.08 

4.44 

8.08 

6.44

4.14

Magnesium 

(Mg)

1.97 

2.22 

2.38 

2.38 

2.22 

1.97

1.97 

2.96 

1.48 

2.55 

2.14

1.32

Sodium 

(Na)

9.48 

11.18 

12.52 

13.31 

11.91 

11.13

10.04 

7.87 

4.48 

5.96 

6.09

3.61

Potassium 

(K)

Bicarbonate 

(HCOS)

4.52 

4.65 

4.67 

4.65 

4.46 

4.62

4.47 

4.16 

2.95 

2.80 

3.61"

3.38

Sulfate 

(S04)

6.18 

7.02 

7.74 

7.77 

7.79 

7.68

6.47 

13.53 

6.33 

12.62 

9.68

4.41

Chloride 

(CD

5.95 

7.14 

7.98 

8.52 

7.19 

6.49

5.78 

1.61 

1.18 

1.21 

1.41

1.30

Fluoride 

(F)

Nitrate 

(NOS)

0.04 

.03 

.03 

.03 

.03 

.03

.03 

.02 

.05 

.05 

.01

0.03

a No flow during part of period, 

b No flow June 5 to Aug. 3. 

c No flow Sept. 9-30.
RIO GRANDE BASIN Continued 

RIO GRANDE BELOW ELEPHANT BUTTE OUTLET, N. Mex

LOCATION. At gaging station 3,800 feet downstream from Elephant Butte Dam in Pedro Armend

DRAINAGE AREA. 25,923 square miles (from International Boundary and Water Commission Wate

RECORDS AVAILABLE. Chemical analyses, 1933 to 1951.

REMARKS. Chemical analysis by the Bureau of Plant Industry.Soils,and Agricultural Enginee

Records of discharge for water year October 1950 to September 1951 given in Water-Suppl

Chemical analyses, water year October 1950 to September 19

Month

October, 1950 

January, 1951 

April 

July 

TVtfral

Number 

of 

samples

15 

12 

12

21 

20 

20

25 

20 

24

20 

20 

25

Runoff 

(acrefeet)

8,260 

8,650 

6,370

55, 100 

53,300 

64, 800

61, 600 

29, 700 

62, 800

54, 800 

31,000 

14, 700

451, 100

Silica 

(SiOa) 

ppm

23 

20

Equivalents per million

Calcium 

(Ca)

2.94 

3.01 

3.18

3.25 

3.24 

3.25

3.09 

3.38 

3.58

3.74 

3.80 

4.75

Magnesium 

(Mg)

1.05 

1.04 

1.14

1.11 

1.15 

1.23

1.23 

1.23 

1.37

1.51 

1.55 

2.05

Sodium 

(Na)

3.38 

3.37 

3.37

3.38 

3.46 

3.60

3.76 

4.02 

4.19

4.90 

5.89 

7.56

Potassium 

(K)

0.18 

.26

Bicarbonate 

(HCO,)

2.95 

2.89 

2.85

2.90 

2.95 

a2.91

b2.81 

3.10 

b3.13

2.99 

b2.97 

c2.83

Sulfate 

(S04)

3.14 

3.28 

3.39

3.50 

3.50 

3.58

3.69 

3.84 

4.04

4.56 

4.96 

6.46

Chloride 

(Cl)

1.25 

1.34 

1.54

1.58 

1.60 

1.66

1.72 

1.75 

2.08

2.75 

3.58 

5.20

Fluoride

(F)

0.04 

.05

Nitrate 

(NO,)

0.01

0 

0 

.01

.01 

.01 

.01

a Includes 0.20 equivalents per million of carbonate (CO,), 

b Includes 0.24 equivalents per million of carbonate (CO,), 

c Includes 0.12 equivalents per million of carbonate (CO,).
RIO GRANDE BASIN Continued 

RIO GRANDE NEAR EL PASO, TEX.

LOCATION. At gaging station 5 miles northwest of El Paso, lex., 6 miles northwest of Jua

the American Dam.

DRAINAGE AREA. 29,267 square miles (from International Boundary and Water Commission Wat

RECORDS AVAILABLE. Chemical analyses, 1933 to 1951. 

REMARKS.--Chemical analyses by the Bureau of Plant Industry,Soils,and Agricultural Engine

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

Water Bulletin Numbers 20 and 21.

Chemical analyses, water year October 1950 to September 195

Month

October, 1950 -

January 1951 

Mav

September 

Total

ber 

of 

samples

28 

30 

31

31 

28 

31

30 

31 

30

30 

31 

30

Runoff 

(acrefeet)

18,300 

10, 900 

9,700

8,460 

6,570 

24, 600

32, 300 

17,900 

33, 900

45, 500 

47,800 

17,100

273, 030

Silica 

(Si02 ) 

ppm.

38 

24

Equivalents per million

Calcium

(Ca)

4.49 

4.56 

4.66

4.46 

4.54 

3.78

3.57 

4.08 

4.06

3.46 

3.88 

4.75

Magnesium 

(Mg)

2.01 

2.20 

2.28

2.35 

2.30 

1.57

1.62 

1.81 

1.62

1.77 

1.82 

2.15

Sodium

(Na)

10.28 

12.12 

12.45

12.60 

13.28 

6.47

6.97 

9.12 

6.54

6.26 

6.89 

10.08

Potassium 

(K)

0.28 

.26

Bicarbonate 

(HC03)

3.50 

3.53 

3.68

3.55 

a3.61 

2.85

b2.87 

3.00 

c3. 00

2.88 

b3. 21 

3.75

Sulfate

(so<)

7.58 

8.63 

8.86

8.80 

9.05 

5.33

5.46 

6.91 

5.34

5.25 

5.47 

7.23

Chloride 

(Cl)

6.06 

6.80 

7.15

7.35 

7.60 

3.78

4.02 

5.20 

3.70

3.50 

4.00 

6.00

Fluoride

(F)

0.04 

.05

Nitrate

(N03)

0.03

.01 

0 

.07

.01 

.04

.03 

.01

a Includes 0. 24 equivalents per million of carbonate (CO3). 

b Includes 0.10 equivalents per million of carbonate (COj). 

c Includes 0. 20 equivalents per million of carbonate (CO3).
RIO GRANDE BASIN Continued 

RIO GRANDE BELOW OLD FORT QUITMAN, TEX.

LOCATION.--At gaging station at the rectified channel of the Rio Grande, 1.5 miles below O

below the American Dam at El Paso, Tex. 

DRAINAGE AREA. 31,990 square miles (United States and Mexico;from International Boundary 

Number 20).

RECORDS AVAILABLE. Chemical analyses, 1933 to 1951. 

REMARKS. Chemical analyses by the Bureau of Plant Industry, Soils,and Agricultural Engine

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

Water Bulletin Numbers 20 and 21.

Chemical analyses, water year October 1950 to September 195

Month

October, 1950--

January, 1951,-

April 

May 

July 

Total _ - »

Number 

of 

samples

6

5 

5

5 

7 

5

4 

3 

2

2 

1 

6

Runoff 

(acrefeet)

10, 000 

10, 800 

8,660

5,300 

2,940 

1,710

478 

18.6 

20.2

973 

7,900 

1,280

Cft A.7Q Q

Silica 

(SiOa ) 

ppm

-

47 

44

Equivalents per million

Calcium 

(Ca)

10.16 

10.74 

10.14

10.50 

12.05 

12.85

17.28 

11.72 

15.65

15.15 

3.29 

18.57

Magnesium 

(Mg)

4.94 

5.04 

4.82

5.19 

6.34 

7.96

10.26 

5.37 

7.35

4.99 

.98 

9.83

Sodium

(Na)

28.18 

28.69 

28.30

29.18 

34.72 

42.58

52.96 

24.96 

36.13

19.30 

3.35 

51.46

Potassium 

(K)

0.25 

.29

Bicarbonate 

(HC03)

a 3. 40 

3.77 

3.32

3.30 

2.99 

1.54

2.86 

2.16 

3.90

2.70 

2.12 

b3.20

Sulfate

(S04)

14.04 

14.46 

13.88

14.27 

15.90 

18.87

21.57 

11.11 

15.23

10.38 

1.93 

21.75

Chloride 

(Cl)

26.45 

26.76 

26.40

27.80 

34.51 

43.24

56.32 

28.22 

39.84

26.40 

3.55 

55.20

Fluoride

(F)

~

0.05 

.04

Nitrate

(N03)

0.03 

.01 

.03

.01 

.01 

.05

.01 

.03 

.04

.05 

.04 

.01

a Includes 0. 20 equivalents per million of carbonate (CO3). 

b Includes 0.40 equivalents per million of carbonate (CO3).
RIO GRANDE BASIN Continued 

RIO GRANDE AT UPPER PRESIDIO, TEX.

LOCATION. At gaging station 7.8 river miles above the junction of the Rio Conchos, and abo

Presidio, Tex., and Ojinaga, Chihuahua, and 285.7 river miles below the American Dam at 

DRAINAGE AREA. 35,000 square miles (United States and Mexico; from International Boundary 

Number 20).

RECORDS AVAILABLE. Chemical analyses, 1935 to 1951. 

REMARKS.--Chemical analyses by the Bureau of Plant Industry,Soils,and Agricultural Enginee

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

Water Bulletin Numbers 20 and 21.

Chemical analyses, water year October 1950 to September 1951

Month

October, 1950

November 

December ---

January, 1951

February 

« u

MOV ------- __

July 

September 

ber

ofsamples

5

5

5

5

5

0

2

-

2

6

2

5

Total 

Runoff

(acrefeet)

19,700

6,370

5,510

3,350

1,010

91.2

18.0

9Qfi

b574

4,610

1,700

5,600

AO Q9Q 9

Silica

(SiO,)

ppm

_

36

15

Equivalents per million

Calcium

(Ca)

6.68

9.83

10/47

12.79

18.51

24 84

2 

on

2 94

2.65

Magnesium

(Mg)

1.90

5.17

5.39

6.09

7.31

9 

CO

EC

.51

.54

Sodium

(Na)

10.93

29.98

29.90

32.91

36.40

41 <;A

6

AO

2 74

2 fiQ

2

JQ

2.43

Potassium

(K)

_

~

0.29

.17

Bicarbonate

(HC03)

2.05

2.77

2.61

2.88

2.88

S

CO

a ^ 91

1

00

2 

TO

2 V7

2.25

Sulfate

(S04)

8.11

15.15

15.24

16.68

19.39

9<i mt

1.96

2.15

2.34

Chloride

(ci)

9.72

27.66

28.36

32.80

38.74

At OO

I

Ofi

1 19

AO

1.05

Fluoride

(F)

__

"

0.05

(\A

Nitrate

(NO,)

0.06

--

0

_

.01

.01

no

n4

.05

B

a Includes 0. 20 equivalents per million of carbonate (COJ. 

b Sampled June 2-9 incl. No flow, June 10-30.
RIO GRANDE BASIN Continued

RIO GRANDE AT LANGTRY, TEX.

LOCATION. At gaging station at Langtry, Tex., 24.1 river miles above the confluence wit

below the American Dam at El Paso, Tex. 

DRAINAGE AREA. 79,375 square miles (United States and Mexico; from International Bounda

Number 20).

RECORDS AVAILABLE. Chemical analyses, 1944 to 1951. 

REMARKS. Chemical analyses by the Bureau of Plant Industry,Soils,and Agricultural Engi

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

Water Bulletin Numbers 20 and 21.

Chemical analyses, water year October 1950 to September 1

Month

October, 1950

November 

December 

January, 1951

February 

March 

April ------

July r 

September 

ber

of

samples

7

8

9

8

6 

9

7

10

10

7

7

Total 

Runoff

(acrefeet)

135,000

68, 700

65, 900

56, 300

64, 700

CO Ann

QO QAA

QO Kl\(\

104, 000

177 7AA

Aft Ann

57,500

864, 600

Silica

(SiOa)

ppm

__

__

33

--

Q-1

Equivalents per million

Calcium

(Ca)

4.01

4.10

3.90

4.31

3.88

3

A1

3 

no

2

09

3 

CO

3

RQ

3 

EC

3.74

Magnesium

(Mg)

0.91

1.62

1.70

1.89

1.55

1

O1

I

CO

O9

no

O9

1.05

Sodium

(Na)

4.11

6.00

5.80

5.50

4.99

3 

CIS

3

*71

2.57

2 

»q

3 

on

3.32

Potassium

(K)

__

0.15

--

1 <\

Bicarbonate

(HC03)

2.62

2.57

2.59

a2.85

2.75 

b2.47

2

<?1

2 fiQ

2 

on

2 

OA

c3. 15

Sulfate

(S04)

4.19

5.31

5.27

5.46

5.09 

3HQ

2

pfa

3 

no

3 

DA

3.73

Chloride

(Cl)

2.32

3.80

3.68

3.35

2.52

1 AA

1.10

Q9

1.16

1

0Q

1.10

Fluoride

(F)

0.08

--

AA

 

Nitrate

(N03

0.0

.0

.0

.0

.0

.0

.0

a Includes 0.20 equivalents per million of carbonate (CO,), 

b Includes 0.12 equivalents per million of carbonate (CO,), 

c Includes 0. 22 equivalents per million of carbonate (CO,).
RIO GRANDE BASIN Continued 

RIO GRANDE AT EAGLE PASS, TEX.

LOCATION. At gaging station 0.5 mile above the international highway bridge between Eagl

and 754.6 river miles below the American Dam at El Paso, Tex. 

DRAINAGE AREA. 125,502 square miles (United States and Mexico; from International Bounda

Number 20).

RECORDS AVAILABLE. Chemical analyses, 1938 to 1951. 

REMARKS. Chemical analyses by the Bureau of Plant Industry, Soils,and Agricultural Engin

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

Water Bulletin Numbers 20 and 21.

Chemical analyses, water year October 1950 to September 19

Month

October, 1950

November 

December 

January, 1951

February 

U9V ________ __

July - 

September 

ber

of

samples

26

10

22

27

24

97

9

26

Oft

Oft

25

Total 

Runoff

(acrefeet)

200, 900

100, 400

100, 800

90, 660

69,260

1 no CAfl

ftn oon

173 400

156,300

79 160

71,070

86, 170

1,310,870

Silica

(Si02 )

ppm

_

-_

29

 _

-

24

Equivalents per million

Calcium

(Ca)

4.21

4.16

4.10

3.74

4.16

3

1 Q

3 56

3 n

3.74

3 44

3 11

3.74

Magnesium

(Mg)

1.21

1.91

2.17

2.41

2.34

.1 on

2.24

1.04

.95

1

OK

1.45

Sodium

(Na)

4.44

5.61

6.20

6.99

6.65

5.41

2.62

3 47

4.11

Potassium

(K)

__

0.13

--

.15

~

Bicarbonate

(HCOj)

a2.51

2.91

2.77

2.16

2.60

2.87

a 2. 63

b2.85

K

Sulfate

(S04)

4.03

4.37

4.57

4.99

5.21

4.14

2.39

3

1 A

3.46

Chloride

(Cl)

3.26

4.26

5.02

5.88

5.42

5.01

2.04 

1.90

2

9ft

3.00

Fluoride

(F)

_

__

0.05

--

.06

~

Nitrate

(N03)

0.08

.04

.04

.05

.07

.06

.07

.04 

.03

.06 

.06

.06

a Includes 0.20 equivalents per million of carbonate (CO,): 

b Includes 0.12 equivalents per million of carbonate (CO,).
RIO GRANDE BASIN Continued 

RIO GRANGE AT ROMA, TEX.

LOCATION. At gaging station at international bridge between Roma, Tex., and Cd. Miguel Al

14.9 river miles above the confluence of the Rio San Juan from Mexico, and 992.0 river 

El Paso, Tex. 

DRAINAGE AREA. 157,448 square miles (United States and Mexico; from International Boundar

Number 20) .

RECORDS AVAILABLE. Chemical analyses, 1933 to 1951. 

REMARKS. Chemical analyses by the Bureau of Plant Industry, Soils, and Agricultural Engi

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

Water Bulletin Numbers 20 and 21.

Chemical analyses, water year October 1950 to September 195

Month

October, 1950 

November 

December 

January, 1951 

February 

April 

May ___ - -

July 

September 

rnnf _|

Number 

of 

samples

31 

30 

31

31 

28 

31

30 

10 

30

31 

31 

30

Runoff 

(acrefeet)

222, 700 

105, 100 

101,900

93, 660 

82, 570 

105, 700

74, 610 

321, 700 

295, 500

54,020 

75, 640 

457,000

1,990,100

Silica 

(SiOa) 

ppm

19 

16

Equivalents per million

Calcium 

(Ca)

4.40 

3.95 

3.59

4.00 

3.96 

4.35

3.69 

3.23 

2.95

2.96 

3.44 

2.95

Magnesium 

(Mg)

0.97 

1.92 

2.07

2.43 

2.48 

2.40

1.86 

.89 

bl.08

1.51 

1.37 

.72

Sodium

(Na)

3.25 

6.03 

5.82

6.90 

7.18 

6.59

5.07 

2.50 

1.83

4.14 

3.90 

2.63

Potassium 

(K)

0.12 

.15

Bicarbonate 

(HCO,)

2.76 

2.39 

2.27

2.43 

a2.20 

2.53

2.37 

2.57 

2.35

2.21 

2.45 

2.40

Sulfate 

(S04)

3.96 

4.70 

4.56

4.95 

5.43 

5.76

4.13 

2.27 

2.05

3.63 

3.86 

2.37

Chloride

(Cl)

2.10 

4.88 

4.64

5.86 

6.08 

4.94

4.28 

1.98 

1.35

2.90 

2.42 

1.55

Fluoride 

(F)

0.05 

.05

Nitrate 

(N03)

0.04 

.03 

.06

.04 

.04 

.06

.14 

.04 

.11

.04 

.04 

.03

a Includes 0.10 equivalents per million of carbonate (CO3). 

b By difference.
RIO GRANDE BASIN Continued

PECOS RIVER BELOW ALAMOGORDO DAM. N. HEX.

LOCATION. At gaging station 1,200 feet downstream from Alamogordo Dam, li miles downstre

northeast of Guadalupe , DeBaca County . 

DRAINAGE AREA. 4,390 square miles (contributing area). 

RECORDS AVAILABLE . Chemical analyses: June 1937 to September 1951. 

EXTREMES. 1950-51. Specific conductance: Maximum, 2,860 micromhos Aug. 1-2; minimum, 1

Percent sodium: Maximum, 12 Dec. 11-20: minimum, 8 July 21-25, July 26 to Aug. 2. 

EXTREMES, 1937-51. Specif Ic conductance: Maximum, 3,200 micromhos Jan. 14, 1948; minimu

Percent sodium: Maximum, 19 July 1, 3-10, 1947; minimum, 1 Feb. 21-28, 1950. 

REMARKS . Records of specific conductance of daily samples available in district office 

for dissolved solids are sums of determined constituents. Records of discharge for wa

given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 1951

Date of collection

Oct. 1-10, 1950 

Oct. 21-31 

Nov. 1-10 

Nov. 11-20 

Nov. 21-30 

Dec. 1-10 

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

Feb. 1-10 

Feb. 11-20 

Feb. 21-28 

Mar. 11-20 

Mar 21-31 

Runoff 

(acrefeet)

2,230 

2,090 

148 

116 

124 

140

104 

119 

122 

51 

66 

95

75 

84 

96 

110 

1,440 

9.7 9.20

Silica 

(SiO,) 

ppm

12 

11 

13 

14 

14 

15

15 

19 

15 

13 

14 

14

14 

12 

14 

13 

16 

11

Equivalents per million

Calcium 

(Ca)

12.82 

13.02 

14.02 

13.97 

14.27 

15.07

15.17 

15.67 

15.77 

16.27 

16.37 

16.47

16.57 

17.07 

17.17 

17.56 

17.27 

in ifi

Magnesium 

(Mg)

2.88 

2.80 

3.62 

3.95 

3.62 

4.36

4.44 

5.10 

4.69 

3.78 

4.11 

4.11

4.36 

3.95 

4.03 

4.03 

4.36

4 03

Sodium 

(Na)

1.70 

1.78 

2.09 

2.26 

2.22 

2.17

2.17 

2.70 

2.35 

2.13 

2.04 

2.26

2.26 

2.57 

2.70 

2.48 

2.70

2 59.

Potassium 

(K)

Bicarbonate 

(HCO,)

2.15 

2.16 

2.31 

2.38 

2.29 

2.51

2.54 

2.47 

2.49 

2.46 

2.47 

2.47

2.44 

2.43 

2.38 

2.38 

2.46

2. 9.9

Sulfate 

(S0«)

14.01 

14.01 

15.74 

16.07 

16.09 

17.38

17.34 

18.82 

18.15 

17.78 

18.09 

18.26

18.47 

18.92 

19.05 

19.67 

19.47 

20. 1 5

Chloride 

(Cl)

1.35 

1.47 

1.69 

1.75 

1.75 

1.72

1.86 

2.06 

1.95 

1.97 

2.00 

2.03

2.03 

2.03 

1.97 

2.12 

2.14

2. 12

Fluoride 

(F)

Nitrate 

(NO,)

0.01 

.01 

.01 

.01 

.01 

.00

.00 

.01 

.00 

.01 

.01 

.01

.00 

.01 

.01 

.01 

.01

01

B
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 11-20 

July 21-25 

July 26-Aug. 2 

Aug. 3-10 

Aug. 11-20 

Aug. 21-31 

Sept. 1-10 -- 

Sept. 11-20 

Sept. 21-30 

 Total or 

weighted average1,130

1,400

9,120

10,540

1,760

1,990

1,090

8,870

26,640

7,740

24,650

7,340

1,660

1,590

1,800

2,020

1,860

1,670

1,800

149,400

18.36

18.46

18.96

19.46

19.86

20.16

19.56

20.46

20.66

21.06

20.16

17.56

27.54

11.58

12.77

13.97

13.82

17.17

20.26

13 19.06

4.36

4.36

4.36

4.52

4.69

4.52

4.69

4.61

4.69

4.85

4.77

4.11

6.58

2.96

3.21

3.70

3.29

4.26

5.02

4.44

2.39

2.35

2.61

2.61

2.70

2.44

2.46

2.44

2.65

2.48

2.87

2.00

2.87

1.48.

1.61

1.96

2.00

2.26

2.76

2.52

2.25

2.26

2.29

2.26

2.25

2.20

2.21

2.15

2.20

2.16

2.18

2.79

3.00

2.65

2.44

2.44

2.36

2.29

2.47

2.28

20.38

20.57

21.03

21.44

22.28

22.28

21.86

22.69

22.90

23.53

22.69

16.78

30.81

12.16

13.51

15.26

14.97

19.36

22.69

21.24

2.2.3

2.26

2.23

2.40

2.54

2.43

2.43

2.48

2.48

2.26

2.54

2.09

3.72

1.18

1.49

1.66

1.66

2.26

2.65

2.28

.01 

.01 

.01 

.00 

.01 

.00

.01 

.01 

.01 

.01 

.02 

.04 

.06

.06 

.06 

.05 

.04 

.03 

.03

0.01
RIO GRANDE BASIN Continued

PECOS RIVER NEAR ARTESIA. N. MEX.

LOCATION. At gaging station at bridge on Artesia-Lovington highway, 4.3 miles east of Art

of Rio Penasco, and 17 miles north of McMillan Dam. 

DRAINAGE AREA. 15,300 square miles (contributing area). 

RECORDS AVAILABLE. Chemical analyses: July 1937 to September 1951. 

EXTREMES, 1950-51.--Specific conductance: Maximum, 12,500 micromhos June 18; minimum, 2,0

Percent sodium: Maximum, 60 June 7; minimum, 12 Mar. 25-31. 

EXTREMES, 1937-51.--Specific conductance: Maximum, 17,200 micromhos Aug. 20, 1945; minimum

Percent sodium: Maximum, 71 May 16, 1950; minimum, 12 Mar. 25-31, 1951.

REMARKS. Records of specific conductance of daily samples are available in District offic

for dissolved solids are sums of determined constituents. Records of discharge for wat

given in Water-Supply Paper 1212.

. i

Chemical analyses, water year October 1950 to September 19

Date of collection

Oct. 1-5, 1950 

Oct. 11-20 

Jan. 1-10, 1951 

Jan. 21-31 

Feb. 1-10 

Feb. 21-28 

Mar. 1-10 ._ 

lUfoi* 91 91

Mar. 24 

Runoff 

(acrefeet)

3,760 

5,020 

3,050 

2,410 

1,780 

1,860 

2,000

1,840 

1,750 

1,970 

1,910 

1,810 

1,660

1,700 

1,880 

1,230 

1,520 

1,370 

692 

2,160 

18, 380

Silica 

(SiOa) 

ppm

14 

14 

17 

17 

17 

17 

15

15 

16 

15 

14 

14 

12

15 

18 

14 

12 

13 

13 

21 

14

Equivalents per million

Calcium

(Ca)

21.76 

16.17 

22.75 

23.95 

25.85 

26.65 

26.35

27.45 

28.14 

27.64 

27.35 

28.14 

28.34

28.24 

27.74 

28.84 

29.44 

28.84 

29.84 

26.65 

23.25

Magnesium 

(Mg)

10.28 

5.18 

10.77 

13.49 

15.05 

16.45 

16.69

16.78 

17.43 

17.19 

17.02 

16.86 

18.09

18.09 

17.27 

18.01 

18.67 

19.33 

19.90 

8.96 

55.76

Sodium

(Na)

23.35 

10.09 

24.26 

30.44 

34.09 

37.40 

36.87

39.27 

40.40 

39.87 

40.27 

41.18 

43.05

41.57 

41.61 

44.79 

46.96 

49.14 

46.96 

13.35 

4.09

Potassium 

(K)

Bicarbonate 

(HC03)

2.95 

2.29 

2.21 

2.16 

2.57 

3.41 

3.46

3.61 

3.47 

3.51 

3.51 

3.47 

3.52

3.64 

3.20 

2.93 

2.61 

2.70 

2.62 

3.21 

2.41

Sulfate 

(SO,)

27.69 

19.13 

30.19 

34.77 

36.23 

36.85 

36.43

37.06 

39.56 

38.93 

38.31 

39.14 

39.76

39.35 

38.93 

40.60 

42.89 

42.68 

44.34 

32.89 

26.23

Chloride

(CD

24.82 

10.01 

25.24 

31.59 

36.66 

41.18 

39.77

42.30 

44.56 

43.43 

42.30 

44.28 

45.97

45.97 

43.71 

47.38 

49.07 

51.33 

50.20 

12.58 

4.96

Fluoride

(F)

Nitrate 

(NO,)

0.09 

.08 

.05 

.03 

.06 

.08 

.06

.07 

.05 

.05 

.06 

.06 

.04

.06 

.07 

.07 

.06 

.05 

.08 

.02 

.03
Apr. 1-3 -- 

-

Apr. 4-10 

Apr. 11-20 

May 1-10- _ _ _ -----

May 11-20 

Moir O1 Oq Mav 94 71

June 11-22 

July 1-10 ---

July 11-14 

July 15-20 ---

July 21-31 

Aug. 1-5 

Aug. 6-13 

Aug. 14-18 

Aug. 19-23 

Aug. 24-27 -- -- 

Aug. 28-31 

Sept. 11-17 

Sept. 18-30 -

Total or 

weighted average --

1,720

i 990

i AQH

1,330 

10 >7n 2

1 *>A

OAV

1,200

541

Oft 1

101

1,420

12,410

1 Q5A

10, 470

407

140

440

i din

919

277

139, 200

17

17

17

15

1 It

91

1 Q

1 Q

17

21

14

25

17

15

1 It

1 It

1 It

17

17

15

1 Q

15

15

16

oq AC

29.14

31 54

25.05

29.44

99 Q1

31.04

1 (\ QQ

1 O It'7

QQ qq

26.15

OO Olt

25 35

oq oc

OQ 74

24.65

qq qo

oq ni

OQ q^

oq 7C

qq qq

25.15

10.44

1 C O1

19 24

6 99 H qQ

9 21

14.80

on 71 3 1 9

6.00

oo 70

6.74 8

QO

5 92 6

qq

10.53

ic oi S

ee

ic i q

5.76 9 91

OO OR

9.54

7.65

20.00

qq

7 96

OQ AA

17.44

44.35 8 99

Cn Qq 7

AQ

7 

CO

1 Q AO

7.96

on QI

43.48

91 QI

60.01

i n 70

46.96

17.52

14

2

K.fi

2 70 2

4ft

2 25

2 51

2 on 2

C1

2 20

9 71

2 49 2

00

2

jq

2 91 2

f\q

2 1 

7

2 91

9 11

1 QI 2 OQ

2 If

9 91 2

nq

I on

1 98

2.54

qq 7q

Af\ QQ

J C 10

OO QA

on qc

oo 7q

07 07

45 59

9 91

14.47

49.55

31 02

30.40

97 97

OQ 7Q

40.81

q i oc

45.80

Olt OQ

OQ QA

41 4Q.

32 27

31.23

7 

at

on QI

q^ 07

49 07 8

1 Q

q i 07

17.77

AK Q7

60.07 8

Cq

OQ VJ

79 9n

6.43 4

OQ

21.01

5 53 8 m

21 72

45 97

21 43

fiO fi1

11 56

26 09

50.20

29 61

79 90 1 Cl . *<W

18.42

05

.05

.07m

10

nt

.01

.05

04

AO

.06

.05

.08

1 Q

.07

AQ

.09

.10

n^

0.05
RIO GRANDE BASIN Continued 

PECOS RIVER NEAR ORLA, TEX. 

LOCATION. At gaging station 600 feet upstream from Pasotex pipe-line crossing, 6 miles s

11 miles downstream from Salt (Screwbean) Draw, and 14 miles downstream from Red Bluff 

DRAINAGE AREA. 21,300 square miles (contributing area). 

RECORDS AVAILABLE. Chemical analyses: July 1937 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 11,600 micromhos Sept. 5-8; minimum, 

Percent sodium: Maximum, 58 Sept. 1-30; minimum, 44 Oct. 1-4.

EXTREMES, 1940-51. Maximum, 64 Sept. 1-10, 1947, Sept. 19-30, 1948; minimum, 9 Aug. 17-1

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

samples from November 1941 to September 1951 available in district office at Austin, T

year October 1950 to September 1951 given in Water-Supply Paper 1212.

Chemical analyses, water year October 1950 to September 195

Date of collection

Oct. 1-4, 1950 

Oct. 5-6, 8-10 

rw»t 7 11 ^1

Nov. 1-30 

Dec. 1-31 

Jan. 1-31, 1951 

IToH 1 9ft

Mar. 1-5, 27-31 

Mar. 6-26 

Apr. 1-30 

May 1-31 - 

July 1-31 - 

Aug. 1-31 

Total or 

weighted averageRunoff 

(acrefeet)

657 

139 

1,950 

2,100

776 

673

6,340 

2,740 

472

22, 840 

23,820

8,910 

28,750

9,030 

1,160

110,300

Silica 

(SiOa) 

ppm

11 

17 

17 

17

13 

9.0

16 

15 

9.5

16 

23

21 

23

27 

23

21

Equivalents per million

Calcium 

(Ca)

12.03 

23.85 

22.85 

23.35

26.55 

27.94

24.75 

25.85 

28.94

24.55 

24.55

24.75 

26.25

26.65 

29.44

25.20

Magnesium 

(Mg)

2.80 

11.68 

12.50 

9.95

13.40 

15.71

12.83 

13.73 

15.21

12.01 

13.73

13.98 

14.56

13.65 

18.01

13.49

Sodium

(Na)

11 

43 

30 

31

33 

41

32 

35 

47

30 

33

37 

38

41 

65

35

Potassium 

(K)

.74 

.51 

.98 

.64

.89 

.18

.26 

.74 

.35

.97 

.24

.27 

.31

.11 

.38

.35

Bicarbonate 

(HCO3)

1.15 

1.62 

1.90 

2.16

2.03 

2.18

2.20 

2.21 

1.90

2.13 

1.43

1.84 

1.67

1.77 

1.57

1.79

Sulfate 

(S0«)

13.22 

29.98 

32.48 

34.56

37.68 

39.76

35.18 

36.43 

41.64

34.35 

36.23

37.47 

38.52

37.89 

44.14

36.43

Chloride

(Cl)

12.13 

47.38 

31.87 

28.20

34.13 

42.87

32.43 

36.66 

47.95

31.02 

33.84

36.66 

38.92

41.74 

67.12

35.54

Fluoride

(F)

Nitrate 

(N03)

0.07 

.06 

.08 

.02

.01 

.02

.03 

.02 

.01

.03 

.02

.03 

.01

.01

0.02
RIO GRANDE BASIN Continued 

PECOS RIVER NEAR COMSTOCK, TEX.

LOCATION. At gaging station at the Pecos High Bridge on the railroad 12 miles northwest 

confluence with the Rio Grande. The river enters the Rio Grande 638.2 river miles bel

RECORDS AVAILABLE. Chemical analyses, 1935 to 1951.

REMARKS. Chemical analyses by the Bureau of Plant Industry, Soils,and Agricultural Engine

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

Water Bulletin Numbers 20 and 21.

Chemical analyses, water year October 1950 to September 195

Month

October, 1950 

November - 

December - 

January, 1951-

Marr*ti

April 

May ---------

July 

September - 

Total -

Number 

of 

samples

16 

15 

15

15 

14 

15

15 

17 

15

15 

15 

14

"

Runoff 

(acrefeet)

14,700 

12, 100 

14,000

15,200 

14, 300 

13,600

10, 600 

20, 100 

9,520

7,120 

8,560 

7,680

147,480

Silica 

(SiOa) 

ppm

12 

16

--

Equivalents per million

Calcium 

(Ca)

9.66 

8.06 

9.90

10.85 

11.40 

9.89

10.15 

4.85 

6.93

6.38 

8.47 

6.95

-

Magnesium 

(Mg)

7.97 

6.47 

8.30

9.67 

9.83 

8.78

8.80 

3.38 

5.82

5.45 

6.99 

5.53

--

Sodium 

(Na)

26.14 

20.16 

26.32

31.70 

32.86 

29.47

29.22 

11.20 

18.76

16.72 

22.38 

17.24

-

Potassium 

(K)

0.22 

.20

Bicarbonate 

<HC05)

a2.65 

b2.40 

2.70

2.32 

2.52 

2.22

2.18 

2.05 

2.17

2.37 

2.55 

2.60

Sulfate 

(S0«)

14.06 

11.13 

14.30

16.63 

17.23 

15.08

15.23 

5.83 

9.62

8.60 

11.90 

9.02

Chloride 

(Cl)

27.31 

21.20 

27.56

33.40 

34.60 

31.00

30.44 

11.76 

19.55

17.40 

23.40 

18.10

Fluoride 

<F)

0.06 

.06

Nitrate 

(NO,)

0.04 

.04 

.03

.03 

.04 

.06

.04 

.04 

.04

.04 

.03 

.04

a Includes 0.20 equivalents per million of carbonate (CO3). 

b Includes 0.10 equivalents per million of carbonate (COg).
Part 9. COLORADO RIVER BASIN

COLORADO RIVER MAIN STEM 

COLORADO RIVER NEAR GLENWOOD SPRINGS. COLO.

which is at power 

LOCATION. At Shoshone power plant, 6 miles upstream from gaging station,

and half a 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, 1950-51. Specific conductance: Maximum, 1,110 micromhos Oct.

Percent sodium: Maximum, 45 Mar. 11-20; minimum, 19 June 21-30. 

EXTREMES, 1941-51.--Specific conductance: Maximum, 1,370 micromhos Jan.

Percent sodium: Maximum, 51 Mar. 21-31, 1944; minimum, 13 June 11-20, 1949. 

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

in regional office at Salt Lake City, Utah. Discharge records for gaging station at Gl

to September 1951 given in Water-Supply Paper 1213. No appreciable inflow between samp

periods of heavy local rains.

Chemical analyses, water year October 1950 to September 1

18, Nov. 3; minimu

20. 1943; minimum

Date of collection

rw>t 1 in IQ^O

Oct 1 1 20

Oct. 21-31 

Nov. 1-10 

Nov. 21-30 

Dec. 11-13, 18 

Dec. 14-17, 19-20 

Jan. 11-20 

Jan. 21, 24-29, 31 

Runoff 

(acrefeet)

17,850 

14, 840 

15,950 

16, 070 

17, 830 

19, 140

15,770 

6,830 

13,410 

19,540 

15,160 

20, 160 

19, 040 

5,040

Silica 

(SiOa ) 

ppm

12 

12 

13 

12 

12 

13

13 

13 

13 

13 

13 

12 

11 

13

Equivalents per million

Calcium 

(Ca)

3.99 

4.19 

4.14 

3.94 

3.59 

3.29

3.69 

3.34 

2.54 

3.09 

3.14 

2.79 

2.40

Magnesium 

(Mg)

1.56 

1.04 

1.64 

1.56 

1.40 

1.23

1.32 

1.23 

.90 

1.15 

1.23 

.99 

.82

Sodium

(Na)

3.61 

3.91 

4.04 

3. 52 

3.22 

2.78

3.87 

3.65 

1.96 

3.09 

3.78 

2,91 

2.04

Potassium 

(K)

Bicar - 

bonate 

(HC03)

2.49 

2.62 

2.65 

2.59 

2.46 

2.33

2.52 

2.31 

1.98 

2.25 

2.29 

2.05 

1.87 

2.11

Sulfate

(S0«)

3.12 

3.39 

3.41 

3.14 

2.81 

2.60

2.81 

2.52 

1.83 

2.31 

2.31 

1.96 

1.62 

2.12

Chloride 

(Cl)

3.72 

3.72 

3.72 

3.24 

3.16 

2.71

3.72 

3.55 

1.83 

2.99 

3.72 

2.85 

1.97 

3.61

Fluoride

(F)

0.01

Nitrate 

(N03)

0.01 

.02 

.02 

.02 

.02 

.01

.01 

.01 

.01 

.01 

.01 

.01 

.01 

.01

a Sum of determined constituents.

b Not included for computation of weighted averages.
Feb. 1-10 

Feb. 11-18 

Feb. 19-20 b 

Feb. 21-28 

Mar. 1-4, 7-10 

Mar. 5-6 b 

Mar. 11-20 

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 11-20 

July 21-31 

Aug. 1-10 

Aug. 11-20 

Aug. 21-31 

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 

Total or

weighted average 

22,510

16,490

3,340

15,710

16,410

2,980

18,410

20,080

21, 440

28,150

54, 720

72, 280

100, 300

208, 700

162,400

169, 300

203,900

118, 700

85,170

80, 910

61, 430

34, 570

36, 280

25, 590

25, 590

25,690

(d)

11

12

13

13

13

12

11

10

11

13

15

12

11

10

9.8

8.7

8.5

10

12

12

14

13

12

12

11

2.50

2.69

2.54 

2.35 

c4. 

2.64 

2.64

2.64

2.25

1.90

1.85

1.55

1.45

1.35

1.40

1.35

1.35

1.45

1.95

2.20

2.59

2.89

3.04

2.89

3.14

00

1.95

.99 

1.07

1.07 

.99

1.15 

1.07'

1.15 

.90 

.74 

.66 

.60 

.52

.54 

.54 

.45 

.50 

.36 

.79

.72

.90

.99

1.15

1.07

.99

0.72

2.48

2.61

2.26

2.22

3.13

2.87

2.78

2.13

1.09

.87

.70

.52

.57 

.57 

.43 

.65 

.83 

1.04

1.22

2.26

2.35

2.70

2.70

3.00

1.26

1.90

1.97

2.18

1.90

1.90

2.16

2.13

2.15

2.18

1.61

1.36

1.43

1.30

1.25

1.34

1.61

1.90

2.03

2.20

2.26

2.13

2.13

1.69

1.75

1.94

2.31

1.77

1.73

2.12

2.06

2.04

1.98

1.62

1.08

.96

.71

.58

.62 

.71 

.62 

.69 

.52 

1.31

1.31

1.85

2.14

2.31

2.14

2.21

1.17

2.40

2.45

3.67

2.12

2.12

3.95

3.05

2.74

2.65

2.09

.93

.68 '.56

.28

.51 

.37 

.31 

.54 

.76 

.93

1.07

2.17

2.17

2.59

2.65

2.88

1.16

.01 

.01

.01 

.02 

.01 

.01 

.01

.01 

.01 

.02 

.02 

.02 

.02

.01 

.01 

.01 

.01 

.01 

.01

.02 

.01 

.01 

.01 

.01 

.01

0.01

a Sum of determined constituents, 

b Hot included for computation of weighted averages, 

c Hardness determined by Schwarzenbach method.

d For computation of the weighted averages the total discharge corresponding to 1, 836,000 acre-feet was used. Th

1950 to September 1951.
COLORADO RIVER MAIN STEM Continued

COLORADO RIVER NEAR CISCO. UTAH

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

from Green River, and 235 miles upstream from San Juan River. 

DRAINAGE AREA. 24,100 square miles.

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. Specific conductance: Maximum, 2,370 micromhos Oct. 20; minimum, 3

Percent sodium: Maximum, 48 Jan. 11-20, Apr. 11-20; minimum, 26 June 21-30.

EXTREMES, 1941-51. Specific conductance: Maximum, 4,100 micromhos Sept. 30, 1946; min

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

available in regional office at Salt Lake City, Utah. Records of discharge for wate

given in Water-Supply Paper 1213.

Chemical analyses, water year October 1950 to September 19

Date of collection

Oct. 1, 9-10, 1950 - 

Oct. 12, 17-20 

Nov. 1-10 

Tfcw i_in ........

Dec. 11-20 

Dec. 21-31 

Jan. 1-10, 1951 

Jan. 11-20 .

Jan. 21-22, 24 a 

1«*ah in 1 Q

Tfot* on 90

Mar. 2, 6, 8-10 

Mar. 11-20 

Mar. 21-31 

Runoff 

(acrefeet)

12, 990 

19,160 

19,380 

43, 100 

56, 030 

62, 220

53, 300 

59, 700 

54,450 

46, 990 

45, 200 

16, 380

58, 970 

48,600 

26, 780 

52, 340 

56, 890

Silica 

(SiO,) 

ppm

12 

12 

11 

12 

15 

14

14 

13 

14 

15 

16

12 

14 

15 

14 

11

Equivalents per million

Calr 

cium 

(Ca)

8.23 

9.33 

8.98 

7.98 

7.73 

7.09

6.84 

6.24 

6.04 

6.09 

6.19

4.99 

5.39 

5.39 

4.99 

4.84

Magnesium 

(Mg)

6.50 

7.24 

6.91 

5.84 

5.43 

4.61

4.85 

4.36 

4.52 

4.61 

4.61

3.62 

3.70 

3.78 

3.54 

3.62

Sodium 

(Na)

9.57 

10.61 

11.00 

10.61 

8.87 

8.04

8.91 

8.17 

8.48 

9.48 

9.83

7.74 

7.87 

8.22 

7.52 

7.35

Potassium 

(K)

Bicarbonate 

(HCO3)

3.31 

3.74 

3.87 

3.80 

3.80 

3.70

3.80 

3.64 

3.54 

3.62 

3.75

3.21 

3.38 

3.43 

3.21 

3.11

Sulfate 

(S04)

15.72 

18.15 

16.86 

14.37 

13.28 

11.76

11.97 

10. 76 

10.08 

10.18 

10.12

8.37 

8.51 

8.99 

8.14 

7.91

Chloride 

(Cl)

5.22 

5.64 

6.20 

6.20 

5.36 

4.65

5.50 

5.08 

5.36 

6.43 

6.63

5.30 

5.78 

5.44 

4.96 

5.27

Fluoride 

(F)

Nitrate 

(N03)

0.14 

.15 

.15 

.18 

.13 

.13

.13 

.13 

.13 

.14 

.16

.14 

.11 

.10 

.10 

.10

a Not included for computation of weighted averages.
Apr. 1-10 

Apr. 11-20 - 

Apr. 21-30 - 

May 1-7 a 

May 11-20 

May 21-31 a

June 1-10 

June 11-20 

June 21-30 

July 1, 5-10 

July 11, 13, 15-16,20 

July 22-26, 31 

Aug. 1-4, 9 

Aug. 11-20 

Aug. 21-31 

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 

Total or

weighted average49,980

38,160

84,650

69,760

201,600

434,200

353,300

363,600

456,400

169,100

72,810

78,330

50,060

52,800

74,720

54,550

34,370

41,590

(b)

13

10

15

14

18

16

16

15

15

17

15

14

15

14

14

12

15

4.99

5.19

4.14

2.89

2.59

2.59

2.40

2.59

3.24

4.49

5.04

6.54

8.83

7.68

9.18

6.98

4.24

3.54

3.78

2.63

1.56

1.15

1.23

.99

1.32

1.97

2.38

2.96

4.61

4.85

4.85

6.58

6.58

2.63

7.13

8.22

4.78

2.17

1.48

1.48

1.22

1.87

2.83

3.52

4.74

6.74

7.57

7.96

10.04

9.44

4.30

3.11

3.05

2.85

2.16

2.20

2.10

1.98

1.84

2.13

2.44

2.79

2.95

3.41

3.34

3.41

3.41

2.61

7.85

8.79

5.25

2.96

2.31

2.50

2.06

3.00

4.46

6.20

7.12

11.43

14.09

12.78

17.03

16.45

6.06

4.77

5.56

3.13

1.18

1.75

2.71

3.53

3.78

3.89

4.94

4.60

2.54

.

.

.

.

.

.

.

.

.

.

.

.

0.

a Not included for computation of weighted averages.

b For computation of the weighted averages the total discharge corresponding to 2,892,000 acre-feet was used. 

year October 1950 to September 1951.
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 

stream from Utah-Arizona State line, 61.5 miles upstream from Little Colorado River, an

DRAINAGE AREA. 107,900 square miles.

RECORDS AVAILABLE. Chemical analyses: July 1926, October 1926 to September 1927, Octobe

October 1945, October 1947 to September 1951. 

Water temperatures: July 1949 to September 1951.

Sediment records: October 1928 to September 1933. November 1942 to September 1944. O

EXTREMES, 1950-51. Specif ic conductance: Maximum, 1,790 micromhos Jan. 23, 1951; minimum

Percent sodium: Maximum, 41 Jan. 11-31, Feb. 11 to April 10; minimum, 21 June 1-10. 

EXTREMES, 1942-45, 1947-51. Specif ic conductance: Maximum, 2,280 micromhos Oct. 15, 194

Percent sodium: Maximum, 46 Mar. 2, 4, 7, 10, 1944; minimum, 21 June 21-30, 1949, June 

REMARKS. Records of specific conductance of daily samples available in district office a

for water year October 1950 to September 1951 given in Water-Supply Paper 1213. Value

determined constituents.

Chemical analyses, water year October 1950 to September 

Date of collection

Oct. 1-10, 1950 

Oct. 11-20 

Oct. 21-31 -----

Nov. 1-10 

Nov. 11-20 

Nov. 21-30 -- ---

Dec. 1-10 

Dec. 11-20 ~ 

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

Runoff 

(acrefeet)

127, 400 

106, 400 

107, 600 

97, 780 

112,200 

139, 700

140, 800 

129, 400 

144, 800 

104, 300 

125,700 

125,300

Silica 

(SiO,) 

ppm

13 

11 

8.8 

8.7 

9.1 

12

12 

11 

11 

12 

12 

12

Equivalents per million

Calcium 

(Ca)

6.44 

6.04 

6.09 

6.34 

6.19 

6.29

5.39 

5.64 

5.29 

5.59 

6.04 

5.99

Magnesium 

(Mg)

3.95 

4.11 

4.61 

4.77 

4.69 

4.61

3.95 

4.36 

4.11 

3.87 

4.11 

4.19

Sodium 

(Na)

6.52 

6.39 

7.09 

7.57 

7.35 

6.61

5.87 

6.39 

6.04 

6.39 

7.04 

7.26

Potassium 

(K)

0.20 

.21 

.20 

.22 

.24 

.20

. 14 

.10 

.13 

.13 

.18 

.16

Bicarbonate 

(HC03)

3.64 

3.52 

3.38 

3.54 

3.79 

3.90

3.72 

3.75 

3.75 

3.77 

4.00 

4.08

Sulfate 

(SO,)

10.70 

10.45 

11.20 

11.72 

11. 10 

10.64

8.91 

9.29 

8.62 

9.06 

9.58 

9.51

Chloride 

(Cl)

2.65 

2.88 

3.24 

3.64 

3.67 

3.30

2.71 

3.22 

2.99 

3.33 

3.95 

3.95

Fluoride

(F)

0.03 

.02 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.01 

.02 

.01

Nitrate 

(N03)

0.07 

.07 

.07 

.06 

.06 

.07

.07 

.07 

.06 

.07 

.07 

.08
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 1-10 

May 11-20 - 

May 21-31 -

June 1-10- 

June 11-20 

June 21-30 

July 1-10 - 

July 11-20 

July 21-31 

Aug. 1-4 

Aug. 5-11 - 

Aug. 12-20 

Aug. 21-31 

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 

Total or

weighted average 

98,240

144,100

118,100

140,900

135, 700

140,900

158,200

164,800

208,000

299,400

457,500

888,000

1,086,000

734,100

1,065,000

640, 700

376, 800

338,900

123,700 

265, 500 

199,200 

198, 300 

205, 700 

111,900 

93, OOP

9,817,000

12

12

9.5

15

16

16

14

16

15

16

15

16

15

13

12

13

11

12

17

17

15

12

16

13

12

14

5.39

5.39

4.74

4.69

4.94

4.69

4.39

4.19

3.94

3.44

3.24

2.89

2.50

2.79

2.59

2.50

2.69

3.54

4.39

9.18

4.79

5.19

7.78

5.79

6.14

3.94

3.70

3.54

3; 45

3.45

3.70

3.45

3.29

3.12

2.71

2.30

1.81

1.48

1.15

1.32

1.07

1.15

1.32

1.73

2.30

3.45

2.14

2.47

3.29

3.37

4.11

2.22

6.26

6.39

5.74

5.70

6.13

5.74

5.39

5.00

4.09

2.74

2.22

1.61

1.00

1.48

1.22

1.26

1.74

2.35

2.65

4.52

3.35

3.91

4.65

4.48

5.91

3.13

.12 

.14 

.12 

.15 

.15 

.08

.10 

.13 

.10 

.12 

.10 

.12

.12 

.07 

.07 

.09 

.09 

.10

.26 

.25 

.13 

.21 

.21 

.20 

.22

0.13

3.78

3.65

3.41

3.39

3.62

3.57

3.57

3.39

3.39

3.29

2.97

2.74

2.52

2.72

2.56

2.52

2.46

2.79

3.67

3.56

3.20

3.15

3.59

3.44

3.28

3.03

8.20

8.41

7.72

7.58

7.93

7.35

6.93

6.45

5.31

3.75

3.29

1.69

2.29

1.87

1.87

2.54

3.91

4.75

12.14

5.93

7.08

10.47

8.18

10.37

4.89

3.27

3.44

2.74

2.88

3.19

3.02

2.76

2.43

2.09

1.35

1.10

.71

.48

. .56

.45

.54

.79

1.07

1.13

1.61

1.21

1.64

1.89

2.03

2.85

1.47

.01 

.02 

.01 

.01 

.02 

.02

.02 

.02 

.03 

.03 

.02 

.02

.02

.0.1 

.03 

.01 

.02 

.02

.02 

.01 

.01 

.01 

.02 

.02 

.02

0.02

.01 

.02 

.03

.02 

.01 

.04 

.03 

.04 

.06 

.05

0.04

a Less than 0.1 part per million of boron.
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 

Grand Canyon Village, Coconino County, 26 miles downstream from Little Colorado River

Hoover Dam.

DRAINAGE AREA. 137,800 square miles.

RECORDS AVAILABLE.--Chemical analyses: August 1925 to November 1942, September 1943 to 

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. Specific conductance: Maximum, 1 920 micromhos Oct. 2; minimum, 470 

Percent sodium: Maximum, 45 Jan. 11-20; minimum, 23 June 1-10. 

EXTREMES, 1937-51. Specific conductance: Maximum, 2,900 micromhos Sept. 6, 1940; minim

Percent sodium (1941-51): Maximum, 48 Sept. 11-20, 1942; minimum, 20 June 1-10, 1950.

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

available in regional office at Salt Lake City, Utah. Records of discharge for water 

given in Water-Supply Paper 1213.

Chemical analyses, water year October 1950 to September 1951

Date of collection

Oct. 1-10, 1950 -----

Oct. 11-20 

Oct. 21-31 

Nov. 1-10 -. --

Nov. 11-20 

Nov. 21-30 

Dec. 1-10 

Dec 11-20 -------

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

Runoff 

(acrefeet)

134,200 

112,800 

112,200 

100,300 

115,300 

139, 600

147,500 

134,800 

152,100 

111,700 

89,770 

124,900

Silica 

(SiO.) 

ppm

15 

13 

11 

9.6 

10 

12

13 

13 

14 

13 

14 

14

Equivalents per million

Calcium 

(Ca)

7.53 

6.39 

6.39 

6.39 

6.69 

6.49

5.84 

5.89 

5.74 

5.59 

6.24 

6.29

Magnesium 

(Mg)

4.19 

4.11 

4.52 

4.85 

4.85 

4.52

4.03 

4.03 

4.03. 

3.87 

4.44 

4.44

Sodium 

(Na)

8.04 

7.35 

7.91 

8.48 

8.70 

7.96

6.91 

7.17 

7.31 

7.22 

8.78 

8.44

Potassium 

(K)

0.15 

.13 

.11 

.14 

.13 

.14

.09 

.38 

.36 

.38 

.24 

.26

Bicarbonate 

(HCO,)

4.52 

4.20 

4.03 

4.00 

4.29 

4.20

4.15 

4.28 

4.24 

4.16 

4.29 

4.41

Sulfate

(sou

10.81 

10.06 

10.45 

11.37 

10.99 

10.39

9.35 

8.93 

8.54 

8.22 

9.39 

9.45

Chloride

(Cl)

4.09 

3.95 

4.79 

4.57 

5.08 

4.57

3.44 

4.17 

4.32 

4.34 

5.58 

5.47

Fluoride 

(F)

0.02 

.03 

.03 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02

Nitrate 

(NO,)

0.03 

.05 

.06 

.07 

.06 

.07

.07 

.06 

.06 

.07 

.09 

.09
Feb. 1-10 - 

Feb. 11-20- 

Feb. 21-28 

Mar. 1-10 - 

Mar. 11-20 

Mar. 21-27

Apr. 1-10 

Apr. 11-13, 17-19-- 

Apr. 21-30 ------

May 1-10 - 

May 11-20 - - - 

May 21-31 -------

June 1.10 

June 11-20- 

June 21-30 - 

July 7-10 - 

July 11-20 - 

July 21-31 

Aug. 1-3, 6-10 - 

Aug. 11 a - 

Aug. 13-20 

Aug. 21-30 - 

Aug. 31 a 

Sept. 1-10 - ----- 

Sept. 11-20 

Sept. 21-30 

Total or 

weighted average102,800

144,600

118,900

146,200

137,900

93,860

161,500

101,200

204,600

300,700

445,100

805,900

1,059,000

728,700

1,013,000

222,100

395,900

346,700

298,100

31,540

186,600

170,000

38,480

236,900

118,600

96,280

(c)

14

14

12

13

11

10

14

14

14

16

16

16

15

12

13

11

11

14

17

15

14

15

10

11

14

5.79

5.74

5.09

4.84

5.39

5.14

5.14

4.74

4.39

3.89

3.79

3.49

3.04

3.29

3.09

2.69

2.74

4.19

4.03

3.87

3.54

3.45

3.45

3.45

3.37

3.04

2.88

2.38

2.30

1.73

1.32

1.32

1.23

1.23

1.40

1.73

6.79 2.80

bl3.36

5.1.9 I 2.55

4.79 I 2.55

b8.80

7.49

5.94

6.19

4.39

3.12

3.04

3.78

2.38

7.57

7.44

6.74

6.83

6.83

7.00

6.31

6.04

5.17

3.65

2.91

2.09

1.35

1.70

1.39

2.13

3.26

4.48

4.48

4.78

6.35

6.09

7.48

1.92

3.96

.23 

.19 

.21 

.20 

.49 

.41

.31 

.26 

.26 

.14 

.15 

.13

.15 

.12 

.14

.15

.17

.19

.18 

.16

.17 

.14

0.18

4.23

4.05

3.77

3.62

4.26

4.20

4.24

4.06

4.00

3.83

3.74

3.41

3.44

3.38

3.26

2.70

2.72

3.31

3.67

3.70

3.46

3.51

5.05

3.70

3.92

4.00

3.62

8.22

8.39

7.72

7.74

7.64

7.49

7.10

6.64

5.52

4.04

3.52

2.91

1.73

2.21

1.87

2.14

2.46

4.23

8.56

16.34

6.75

6.22

.0.56

.0.33

7.79

8.97

5.02

4.96

4.57

3.89

3.89

4.37

4.37

3.81

3.44

2.93

1.95

1.66

.96

.71

.87

.65

.96

1.30

1.83

1.86

2.14

1.97

2.65

5.22

2.93

3.33

4.54

2.17

.02 

.02 

.02 

.02 

.02 

.02

.03 

.03 

.03 

.03 

.03 

.03

.02 

.02 

.02 

.02 

.02 

.03

.02

.02 

.02

.02 

.02 

.02

0.02

.07 

.07 

.07 

.05 

.04 

.06

.03 

.03 

.03 

.04 

.05 

.04

.03 

.02 

.02 

.02 

.01 

.01

.01

.03 

.03

.04 

.04 

.07

0.04

a'Not included for computation of weighted averages, 

b Hardness determination by Schwarzenbach method.

c For computation of the weighted averages the total discharge corresponding to 9,110,000 acre-feet was used. Thi

year October 1950 to September 1951.
COLORADO RIVER MAIN STEM Continued

COLORADO RIVER BELOW HOOVER DAM, ARIZ.-NEV.

LOCATION. At Hoover Dam, Ariz.-Nev. state line between Mohave County, Ariz., and Clark Co

gaging station below Hoover Dam.

DRAINAGE AREA. 167,800 square miles above Hoover Dam. 

RECORDS AVAILABLE. Chemical analyses: November 1939 to September 1951.

Water temperatures: October 1941 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 1,020 micromhos Mar. 5; minimum, 910 m

Percent sodium: Maximum, 41 Feb. 20-21, 23, 26-28; minimum, 34 Oct. 23-27, 30-31. 

EXTREMES, 1939-51. Specific conductance: Maximum, 1,250 micromhos Mar. 2, 1941; minimum, 

Percent sodium (1941-1944, 1950-51): Maximum, 41 Feb. 20-21, 23, 26-28, 1951; minimum,3

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

available in regional Office at Salt Lake City, Utah. Records of discharge for water y

in Water-Supply Paper 1213.

Chemical analyses,, water year October 19'50 to September 19

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 -

Runoff 

(acrefeet)

222,500 

243, 400 

206, 300 

244, 200 

188, 000 

199, 700

174, 100 

261,400 

199, 300 

255, 700 

233, 500 

237, 600

Silica 

(SiOa) 

ppm

13 

13 

14 

13 

13 

13

12 

12 

12 

14 

12 

13

Calcium 

(Ca)

4.24 

4.19 

4.29 

4.19 

4.19 

4.19

4.34 

4.24 

4.34 

4.24 

3.89 

3.79

Magnesium 

(Mg)

2.30 

2.30 

2.38 

2.30 

2.30 

2.14

2.14 2.14' 

2.14 

2.14 

2.22 

2.22

Sodium 

(Na)

3. 

3. 

3. 

3. 

3. 

3.

3. 

3. 

3. 

3. 

4. 

3.

Equivalents per million

Potassium 

(K)

58 

70 

46 

66 

66 

85

80 

79 

74 

65 

10 

94

Bicarbonate 

(HCO,)

2.65 

2.64 

2.62 

2.67 

2.64 

2.62

2.69 

2.70 

2.67 

2.65 

2.69 

2.67

Sulfate 

(S04)

5.48 

5.54 

5.52 

5.50 

5.52 

5.50

5.52 

5.43 

5.52 

5.43 

5.52 

5.33

Chloride 

(Cl)

1.95 

1.97 

1.95 

1.95 

1.95 

2.03

2.03 

2.00 

2.00 

1.92 

1.97 

1.92

Fluoride 

(F)

.Nitrate 

(NO,)

0.04 

.04 

.04 

.03 

.04 

.03

.04 

.04 

.03 

.03 

.03 

.03
TToh 1 51 ^ Q

Feb. 20-21, 23, 26-28 

Mar. 1-2, 5-9 

Mar. 12-16, 19-20 

Mar. 21-23, 26-30 ---

Apr. 11-13, 16-20 

May 11-12, 15-18 

May 21-25, 28-29, 31-

June 11-15, 18-20 

June 21-22, 25-29 - - 

July 2-3, 5, 9-10 

July 11-13, 16-20 -

Aug. 13-17, 20 

Aug. 21-24, 27-31 -

Sept. 11-14, 17-20 - 

Sept. 21, 24-28 

Total or 

weighted average --

193 200

210,000

O-OfJ Qfifi

210,200 

243, 200

244, 000

255 300

188, 600 

248, 300

156,900 

202, 100 

176, 900

134, 500 

226, 500 

175 300

ono 1 r\r\

303, 100

282, 200 

181,900

a7,657,000

12

12

12 

12

12 

12

12

12

1 9.

1 °.

14 

13

14

14 

13 

14

13 

1 ^

13

14

13

1 °.

13 

14

13

3 DO

3 Ad

3.79 

4 19

4.14 

4.39

4 39

4.29 

4 39

4.09

4.09 

4.14

4 19

4.04 

4.19 

4 09

4.24 

4.24

4 29

4

OQ

4.29

4 94

4.29 

4.29

4.19

2.14

2.14

2.22

2 99

2.22

--

2.47

2.38 

2.38

2 QQ

2.38 

2.38 

2.71

2.55

2

CC

2.47

2 

on

2.14

2

QQ

2.30 

2.38

2.30

3 Q1

4

nc

4.24 

4.11

4.04

--

4 33

4.14 

4.09

4.10 

3.94

3 77

3.91 

Son

3 85

3 94

4.17 

3 84

3.94 

3.90

3.91

2.64

2. -72

2 

DC

2.82 

2.72

2

7C

2.77

2 QQ

3 

no

2.80 

2.80

2 75

2.82 

2.75

2 

OR

2.79

2

QA

2

7C

2.77

2 74

2.77 

2.74

2.74

5

0C

5 

At

5.50 

5 54

5.52 

5.60

5 50

5.56 

»; lift

5 7fi

5.64 

5.64

5.58 

5.64 

5 60

5.64 

5 70

5.73

5.66 

5.73.

5.56

1 Q9

1 92

2.00 

2 09

2.03 

2.03

2.14 

2.12

2 1 A

2.14 

2.14

2 09

2.09 

2.09 

2 09

2.14

2 1 9

2 09

2 09

2.06

2.06 

2.06

2.03

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

0.0

a Represents 77 percent of runoff for water year October 1950 to September 1951.
DIVERSIONS AND RETURN FLOWS AT AND BELOW IMPERIAL 

YUMA MAIN CANAL BELOW COLORADO RIVER SIPHON AT YUMA

LOCATION.-rAt gaging station on Yuma Main Canal below Colorado River siphon at Yuma, Yu

downstream from siphon-drop power plant.

DRAINAGE AREA. 242,900 square miles, including all closed basins within drainage bound

RECORDS AVAILABLE. Chemical analyses: September 1926 to September 1928, October 1942 

EXTREMES, 1950-51. Specific conductance: Maximum, 1,090 micromhos on several days dur

Sept. 4.

Percent sodium: Maximum, 42 Aug. 2-3, 6-10; minimum, 36 Apr. 11-12, 16-20. 

EXTREMES, 1943-51. Specific conductance: Maximum, 1,150 micromhos on several days in 

828 micromhos Nov. 21, 1949. '

Percent sodium: Maximum, 42 several periods in 1946, 1947 and 1951; minimum, 32 seve

REMARKS. Samples collected prior to February 1943 were from gaging station on the Colo

dissolved solids are residue on evaporation. Records of specific conductance of dai

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

Chemical analyses, water year October 1950 to September 1

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 

Runoff

(acrefeet)

8,570

10,490

8,710

9 91 A f £tL\J

6,380

6,770

4

QAA

j Ovfu

6,340

4,500

5,500

3,910

7,130

Silica

(Si02 )

ppm

14

14

12

1 o

J.O

17

15

17J.O

13

13

13

14

13

Equivalents per million

Calcium

(Ca)

4.09

4.09

4.09

4 19

4l 29

4.24

4

OQ

 £iO

.39

.29

.34

.39

.29

Magnesium

(Mg)

2.14

2.14

2.22

2

1 A . 1^

2.22

2.22

2 99 . £i£i

2.22

2.30

2.30

2.30

2.38

Sodium

(Na)

4.04

4.13

4.22

4 26

4! 26

4.13

4 22

4! 22

4.22

4.26

4.17

4.30

Potassium

(K)

0.15

.17

.14

12

!lO

.11

17 J.O

.13

.14

.10

.11

.14

Bicarbonate

(HC03)

2.70

2.70

2.79

2 79

2! 77

2.80

2 Q9 o£*

2.80

2.82

2.79

2.84

2.87

Sulfate

(S04)

5.58

5.68

5.70

5. 66

5.77

5.70

5.75

5.81

5.79

5.83

5.79

5.77.

Chloride

(Cl)

2.26

2.28

2.37

2

QJ

 vt

2.37

2.34

2 74 o^

2.37

2.40

2.37

2.40

2.40

Fluoride

(F)

0.01

.01

.01

.01

.01

.01

.01

.01

.02

.02

..02

.02

Nitrate

(N03

0.01

.01

.01

.01

.02

.02

AO

 \l£

.01

.02

.02

.02

.02
Feb. 1-2, 5-9 

Feb. 15-16, 19-21 

Feb. 22-23, 26-28 

Mar. 12-14, 16,19-20 

Mar. 21-23, 26-30 

Apr. 11-12, 16-20 

Apr. 23-27, 30 

May 1-4, 7-10 

May 11, 14-18 

May 21-25, 28-29, 31

July 2-3, 5-6, 9-10 - 

July 11-20 - ~

July 23-27, 30-31 

Aug. 2-3, 6-10 

Aug. 13-17, 20 

Aug. 21-22, 28-29,31

Sept. 11-14, 17-20 

Sept. 21, 24-28 -----

Total or 

 weighted average--

8 0*70

5,490 

5,780 

7490

6,490 

8,200

7,450 

7,690 

5,950

9 A An

7 250

10,530

8

91 f\

7 QQfi

T oon

8,930

14,100 

10,930

10,850

9 ftQfi

5,320 

6,430

11,060

8

QA(\

a 281, 300

1 9.

14 

15

1 9.

11 

8.5

8 Q

10 

14

14

14

15 

15

15

14

15 

17

15 

15

17

12 

16

16

1 A

14

4 

on

4.59

4

OJ

4.39 

4.39

4

QQ

4.49

4 

on

4.44

4

QQ

4.39 

4.34

4 

9 A

4 

on

4.29

4 9Q

4.19

4 1 Q

4 19

4.14

3

QA

3.94 

4 09

4.29

2.14

2.22 

2.22

2

0Q

2.22 

2.22

2 

on

2.30 

2.47

2

CC

2

CC

2.47

2

OQ

2

OQ

2

OQ

2.30

2

0A

2.30 

2 on

2 

on

2.22

2 99

2.38

2 47

2.30

4.2C

4.35 

4.30

4 

on

4.44 

4.52

4.44

3:96 

4.48

4 

CO

4.65

4.65

4.74

4.70 

4.65

4.65

4

AQ

4.39 

41 9.

4.35

4

AQ

4.39

21

.16 

.20 

no

.21 

.19

1 ?.

.12 

.15

.14

1 9.

.14 

.08

.07

.10

.08 

.11

.09 

.10

no

.09

1 A

.16

1 Q

0.13

2.88 

2.90

2

Q7

2.88 

2.84

2 7Q

2.82

3 

no

2

QQ

2

nc

2.90 

200

2 93

2 92

2.90

2

00

2.82

3

AQ

2 41

2.67 

2.65

2.65 

2.65

2.82

5 77

5.89 

5.98

5

QC

5.83 

5.93

5 95

5.89

5 QQ

C QQ

6.00 

6.00

6.00

5 Q1

6.02 

6.00

5

QC

5.79

5 9Q

5.75 

5.89

5.85

2

AQ

2.48 

2.59 

2.40

2.48 

2.54

2.26

2

A9

2

C1

2

KA

2.51

2

AQ

2

CA

2.68

2

/>Q

2.54 

2.40

2.48 

2.26

2.37 

2.43

2.45

.01

.01 

.01 

.02

.02 

.02

.01

.02

n9

n9

.02 

02

.02

.02

.02 

.02

.02 

.02

.02

.02 

n9

.02 

.02

0.02

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

0.0

a Represents 73 percent of runoff for water year October 1950 to September 1951.
GUNNISON RIVER BASIN

GUNNISON RIVER NEAR GRAND JUNCTION, COLO.

LOCATION. At road bridge 1 mile downstream from point of diversion of Redlands power 

Grand Junction, Mesa County, and about half a mile downstream from gaging station. 

DRAINAGE AREA. 8,020 square miles above gaging station. 

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

Water temperatures: April 1949 to September 1951. 

EXTREMES, 1950-1951. Specific conductance: Maximum, 2,680 micromhos Nov. 5; minimum, 

Percent sodium: Maximum, 34 Feb. 1-10; minimum, 15 June 21-30.

EXTREMES, 1941-51. Specific conductance: Maximum, 2,680 micromhos Nov. 5, 1950, mini

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

samples available in regional office at Salt Lake City, Dtah. Records of discharge 

1951 given in Water-Supply Paper 1213.

Chemical analyses, water year October 1950 to September 195

Date of collection

Oct 1 1 20

r\f*t 91 01

Nov. 1-10 

Nov. 11-20 -

Dec. 11-20 

Jan. 1-10, 1951 

Jan. 11-20 

Feb. 1-10 

Feb. 11-19 

IT ^H 9fl Oft

Mar. 1-10 

Mar. 11-20 

Mar 5!1_S1 _--

Runoff 

(acrefeet)

14, 000 

10,890 

11,740 

10,600 

15,030 

23,460

20, 920 

20, 930 

18,230 

15,610 

14,800 

16,700

13, 310 

17,470 

15,230 

16,630 

17,370 

5!1 140

Silica 

(Si02 ) 

ppm

19 

20 

19 

19 

20 

19

19 

17 

19 

19 

20 

18

20 

17 

18 

18 

16 

ifi

Equivalents per million

Calcium 

(Ca)

11.83 

13.02 

12.77 

13.47 

10.68 

7.98

8.13 

7.39 

8.08 

7.49 

7.68 

6.99

7.09 

6.79 

6.64 

6.24 

5.69

4 94

Magnesium 

(Mg)

8.22 

9.37 

9.21 

9.46 

7.48 

5.51

5.84 

5.43 

5.84 

5.26 

5.59 

5.26

5.51 

5.43 

5.35 

5.10 

4.36 

3 70

Sodium

(Na)

7.96 

9.83 

9.91 

9.96 

7.26 

6.26

6.22 

5.65 

6.48 

5.70 

5.87 

5.74

6.35 

6.04 

5.61 

5.31 

4.44 

4 OH

Potassium 

(K)

Bicarbonate 

(HC03)

3.77 

4.33 

4.69 

5.01 

4.54 

3.90

3.85 

3.79 

3.98 

3.74 

3.92 

3.59

3.85 

3.64 

3.54 

3.41 

3.23 

3 os

Sulfate 

(S04)

23.11 

27.06 

25.82 

26.65 

19.88 

15.16

15.64 

14.41 

15.86 

14.37 

14.78 

13.70

14.20 

13,87 

13.32 

12.68 

10.85 

0 35

Chloride 

(CD

0.73 

.85 

.90 

.85 

.68 

.51

.59 

.51 

.59 

.51 

.56 

.51

.54 

.56 

.51 

.48 

.42 

30

Fluoride

(F)

Nitrate 

(N0

0.1

.24 

.14 

.24 

.2

.1

.1

.1

.1

.1

.1

.2

.1

.1

.1

.1

.1

1
Apr. 1-10 

Apr. 11-20 

Apr. 21-30 

May 1-10 a 

May 11-20 ----- 

May 21-22, 24,26-28, 

31 a -------

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, 26-31 -----

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 ------

Total of 

weighted average -

17, 030

13,050

32, 150

43,680

73, 920

107, 300

97,710

112,800

112,800

53,260

19, 620

19,770

24,020

10, 570

10, 970

12,030

10,390

14, 980

(b) 17

5.04

6.09

3.89

3.29

3.39

3.39

2.99

3.99

6.64

9.38

8.33

8.48

9.38

8.73

11.13

12.03

5.69

3.54

4.28

2.22

1.40

1.56

1.40

1.73

2.22

3.78

5.35

4.52

5.26

5.43

5.59

6.99

7.32

3.54

4.09

4.74

2.30

1.35

1.48

1.48

.83

1.91

4.22

6.31

5.17

6.91

6.83

7.17

8.96

8.91

3.74

2.93

3.15

2.62

2.52

2.2? 

2.20 

2.02. 

2.39 

2.85 

3.67

3.54

2.88

3.20

2.82

3.24

3.72

2.92

9.58

11.83

5.58

3.52

4.00

3.89

3.35

5.58

11.45

16.70

13.99

16.99

17.76

17.63

23.11

23.53

9.70

.45 

.59 

.28

.14

.21 

.17 

.16 

.25 

.39 

.56

.39 

.62 

.56 

.65 

.82 

.73

0.37

.09 

.08 

.05

.04

.05 

.05 

.02 

.04 

.04 

.06

.08 

.03 

.09 

.07 

.08 

.16

0.09

a Not included for computation of weighted averages. '

b For computation of the weighted averages the total discharge corresponding to 929, 100 acre-feet was used. This r

water year October 1950 to September 1951.
GREEN RIVER BASIN

GREEN RIVER AT GREEN RIVER, UTAH

LOCATION. At gaging station, 1 mile southeast of Green River, Emery County, 22 miles upst

upstream from mouth. 

DRAINAGE AREA.--40,600 square miles.

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. Specific conductance: Maximum, 1,370 micromhos Jan. 9; minimum, 364 m

Percent sodium: Maximum, 40 Feb. 20-28; minimum, 21 June 1-10.

EXTREMES, 1941-51. Specific conductance: Maximum, 2,420 micromhos Sept. 29, 1943; minimu

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

in regional office at Salt Lake City, Utah. Records of discharge for water year Octobe

Supply Paper 1213.

Chemical analyses, water year October 1950 to September 1

Date of collection

Oct. 1-10, 1950 .......

Oct. 11-20 

Oct. 21-31 

Nov. 1-10 -

Nov. 11-20 

Nov. 21-30 

Dec. 11-20 -- --- 

Jan. 11-20 

Jan. 21-31 

Runoff 

(acrefeet)

51,850 

50,140 

51,250 

49,310 

50,220 

66, 600

59, 330 

57,500 

54, 070 

28, 440 

33, 140 

51, 730

Silica 

(SiO,) 

ppm

11 

10 

9.7 

11 

11 

13

13 

12 

13 

14 

15 

14

Equivalents per million

Calcium 

(Ca)

3.79 

3.69 

3.69 

3.89 

3.94 

3.99

3.69 

3.89 

3.99 

4.54 

4.89 

4.44

Magnesium 

(Mg)

3.12 

3.21 

3.37 

3.54 

3.45 

3.12

3.04 

3.29 

3.12 

3.87 

4.03 

3.37

Sodium 

(Na)

4.22 

4.26 

4.57 

4.61 

4.57 

4.04

3.96 

4.04 

4.00 

5.00 

5.26 

4.26

Potassium 

(K)

Bicarbonate 

(HC03)

3.64 

3.64 

3.70 

3.83 

4.00 

4.13

3.83 

3.98 

3.97 

4.57 

4.87 

4.36

Sulfate 

(S0«)

6.33 

6.22 

6.70 

6.87 

6.77 

6.27

6.12 

6.45 

6.37 

7.79 

8.12 

6.72

Chloride 

(Cl)

1.13 

1.13 

1.18 

1.18 

1.18 

1.13

1.13 

1.16 

1.16 

1.41 

1.55 

1.30

Fluoride 

(F)

Nitrate 

(NOS)

0.02 

.01 

.00 

.01 

.01 

.03

.02 

.03 

.03 

.03 

.02 

.02
Feb. 1-10-- 

Feb. 11-19- 

Feb. 20-28- 

Mar. 1-10-- 

Mar. 11-20- 

Mar. 21-31-

Apr. l-10a 

Apr. 11-20 

Apr. 21-30 a 

May l-10a 

May 11-20 

May 21-31 aJune 1-10 -- 

June 11-20 - 

June 21-30-- 

July 1-10 

July 11-20 - 

July 21-31-

Aug. 1-2, 5-10 

Aug. 11-20 

Aug. 21-31 ----- 

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 

Total or

weighted average 

41,360 

59,600 

6B,290 

63, 670 

65, 570 

75,290

93,400

114,000

164,400

168,200

254,100

459, 800

516, 700

328, 700

463, 700

274, 900

182, 600

169,700

129, 500

117,100

94,550

61,980

53,730

41, 970

(b)

13

13

14

11

11

12

12

12

12

12

12

11

9.2

8.6

12

4.04

3.64

3.29

3.84

3.89

3.99

3.49

2.89

2.50

2.40

2.40

2.20

2.10

3.04

3.59

3.19

4,04

3.69

3.39

3.54

3.04

3.37

3.04

2.88

2.96

2.96

2.96

2.14

1.56

1.07

1.23

1.07

1.07

1.23

1.73

1.81

1.48

1.81

2.30

2.38

2.71

1.89

4.17

4.00

4.04

4.00

3.78

3.78

2.70

1.52

.96

1.13

1.00

1.04

1.22

1.87

2.61

2.17

3.13

3.17

3.48

3.70

2.22

0.09

4.23

3.70

3.38

3.90

3.97

4.05

3.85

3.49

2.98

2.79

2.88

2.65

2.59

3.34

3.15 

3.54 

3.4"l 

3.64 

3.26 

3.20

3.29

6.22 

5.83 

5.66 

6.02 

5.77 

5-. 79

3.75

2.21

1.37

1.71

1.33

1.35

1.60

2.79

4.25

2.98

4.81

4.83

4.95

5.58

3.27

1.16

1.07

1.07

1.10

1.07

1.04

.68

.37

.28 

.28 

.25 

.28 

.37 

.48

.59 

.62 

.79 

.79 

.96 

1.02

0.59

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

0.0

a Not included for computation of weighted averages.

b For computation of the weighted averages the total discharge corresponding to 3, 799,000 acre-feet was used. -T

year October 1950 to September 1951.
SAN JUAN RIVER BASIN

SAN JUAN RIVER NEAR BLANCO, N. HEX.

LOCATION. At highway bridge, half a mile downstream from gaging station which is 1 mil

miles east of Blanco, San Juan County. 

DRAINAGE AREA. 3,320 square miles.

RECORDS AVAILABLE. Chemical analyses: October 1945 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 820 micromhos Aug. 20; minimum, 129 

Percent sodium: Maximum, 44 Aug. 15-20; minimum, 19 May 21-31. 

EXTREMES, 1945-51. Specific conductance: Maximum, 1,420 micromhos Aug. 16, 1947; mini

Percent sodium: Maximum, 52 July 11-16, 18, 20, 1947; minimum, 15 Apr. 21-30, 1949. 

REMARKS. Records of specific conductance of daily samples available in district office 

for dissolved solids concentrations are residue on evaporation. Records of discharg

September 1951 given in Water-Supply Paper 1213.

Chemical analyses, water year October 1950 to September 19

Date of collection

Oct. 1-10, 1950 

Dec. 1-10 - - 

Dec. 21-31 

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

Runoff 

(acrefeet)

6,830 

3,876 

3,220 

2,090 

2,220 

2,750

3,000 

3,070 

2,300 

2,220 

2,460 

3,050

3,170 

4,260 

2,230 

2,750 

7,440 

8,010

Silica 

(SiOa) 

ppm

13

17

Equivalents per million

Calcium 

(Ca)

2.00 

2.25 

2.50 

3.29 

3.09 

2.89

2.99 

2.69 

2.89 

2.99 

2.89 

2.69

2.79 

2.40 

2.40 

2.59 

2.79 

2.30

Magnesium 

(Mg)

0.73 

.75 

.82 

1.15 

1.07 

.99

1.15 

.99 

.99 

.90 

1.15 

1.15

1.15 

.78 

.82 

.82 

1.23 

.82

Sodium

(Na)

1.04 

1.52 

1.83 

2.78 

2.48 

2.17

2.26 

1.91 

2.22 

2.17 

2.65 

2.09

2.13 

1.74 

2.09 

1.91 

1.52. 

1.13

Potassium 

(K)

0.17

.11

Bicarbonate 

(HCO,)

2.36

2.98

Sulfate 

(S0<)

1.48

2.87

Chloride 

(Cl)

0.15

.28

Fluoride

(F)

0.02

.02

Nitrate 

.(NO,)

0.02

.01
Apr. 1-10 

.

Apr. 11-20 ------ 

Apr. 21-30 

TUI av 1 in

May 11-20 ---- - 

May 21 -31 ---- - 

July 1-10 

July 11-20 

July 21-31 ----- 

Aug. 15-20 

Aug. 21-25 

Aug. 26-31, Sept. 1-3-

Sept. 4-10 

Sept. 11-20 

Sept. 21-30 

Total or 

weighted average 

5,950 

7,650 

14,070 

20, 610 

26, 690 

63, 540

38,790 

31,430 

17,800 

5,290 

1,920 

2,610

8,960 

563 

2,630 

12,170 

3,260 

1,540 

910

331,400

19 

11-

2.35 

2.00 

1.60 

1.55 

1.25 

1.20

.85 

1.10 

1.70 

2.30 

2.10

2.30 

3.09 

2.99 

1.60 

2.00 

2.45 

2.94

1.70

.82 

.68 

.49 

.42 

.31 

.26

.26 

.37 

.56 

1.40 

.90

.78 

1.07 

1.07 

.66 

.71 

.82 

1.07

0.54

1.43 

1.09 

.74 

.70 

.52 

.35

.38 

.43 

.70 

1.26 

1.96 

1.87

1.48 

3.22 

2.13 

.96 

1.57 

2.04 

2.96

0.87

.07

.11

2.34

2.06

2.23

1.48

.09

.13

.01

.01

.01

.02

(a) Less than 0.1 part per million of .boron.
LITTLE COLORADO RIVER BASIN

LITTLE COLORADO RIVER AT CAMERON, ARIZ.

LOCATION. At bridge on U. S. Highway 89 at Cameron, Coconino County, 12 miles upstream fr

DRAINAGE AREA. 26,500 square miles above gaging station.

RECORDS AVAILABLE. Chemical analyses: April to September 1951.

REMARKS. Records of specific conductance of daily samples available in district office at 

for dissolved solids are sums of determined constituents. Discharge records for gaging 

October 1950 to September 1951 given in Water-Supply Paper 1213.

Chemical analyses, April to September 1951

Date of collection

Apr. 6-10, 1951 a 

IWTav 1.109

May 15 

July 19-20 a 

July 27-29 

July 30-31 

Sept. 1-4, 7-11 a 

Runoff 

(acrefeet)

83 

248

579 

48

113 

1,990 

1,810

7,690 

1,560 

13, 530

13, 520

Silica 

(SiO,) 

ppm

21 

21

20

23 

21

25 

20 

18

15

Equivalents per million

Calcium 

(Ca)

1.85 

1.60

2.00 

1.40

1.10 

.37 

2.59

2.69 

13.57 

1.25

1.30

Magnesium 

(Mg)

0.74 

.62

.79 

.50

.61 

.36 

.90

.90 

5.02 

.30

.45

Sodium 

(Na)

7.78 

6.57

9.48 

4.

6. 

5.52 

7.13

10.26 

6.52 

4.61

4.09

Potassium 

(K)

0.18 

.20

.24 

24

37 

.20 

.23

.16 

.28 

.18

.09

Bicarbonate 

(HCO,)

2.72 

2.63

3.65 

2.82

4.69 

4.35 

3.10

5.24 

5.21 

3.53

2.82

Sulfate 

(S04)

1.31 

1.25

2.73 

.75

1.56 

1.31 

5.10

4.35 

18.67 

1.56

.98

Chloride 

(Cl)

6.49 

5.08

5.92 

2.51

1.41 

.79 

2.40

4.48 

1.27 

1.27

2.00

Fluoride

(E)

0.03 

.03

.03 

.03

.11 

.07 

.05

.04 

.02 

.06

.03

Nitrate 

(NO,)

0.03 

.04

.03 

.03

.01 

.03 

.02

.02 

.02 

.03

.04

a No flow at sampling point Oct. 1 to Apr. 5; no flow at gaging station Apr. 13; no flow during part of period May 1-10

no flow Sept. 15-28.
VIRGIN RIVER BASIN

VIRGIN RIVER AT LITTLEFIELD, ARIZ.

LOCATION.--At gaging station, three-eights of a mile downstream from Beaverdam Wash, t

Littlefield, Mohave County, and 36 miles upstream from water line of Lake Mead at e

sea level.

DRAINAGE AREA. 5,090 square miles.

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, 3,780 micromhos Aug. 24; minimum, 

EXTREMES, 1949-51. Specific conductance: Maximum, 3,950 micromhos Aug. 12,1950; mini

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

samples available in regional office at Salt Lake City, Utah. Records of discharge 

September 1951 g^ven in Water-Supply Paper 1213.

Chemical analyses, water year October 1950 to September 195

Date of collection

Oct. 1-10, 1950 

r\«* 1 1 on

rw»t 91 11

Nov. 1-10 

DAr* 1 1 9fl

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

1?AVi 11 1 Q

Fah 9A 9ft

Mar 1-10 ----

Mar. 21-31 

Runoff 

(acrefeet)

1,360 

1,510 

1,990 

2,150 

3,220 

3,470

3,360 

3,340 

3,560 

3,580 

3,730 

3,720

3,210 

2,250 

2,280 

3,120 

3,240 

1 RSO

Silica 

(SiO.,) 

ppm

23 

19

24 

21

22 

21

Equivalents per million

Calcium 

(Ca)

17.17 

17.86

14.87 

13.97

14.77 

13.37

Magnesium 

(Mg)

10.03 

7.89

7.24 

7.07

7.98 

7.15

Sodium

(Na)

12

::"

12 

11

10 

11

Potassium 

(K)

28 

92

57 

48

92 

21

Bicarbonate 

(HC03)

4.24 

4.97

4.85 

5.13

5.03 

5.05

Sulfate 

(S04)

23.94 

21.65

19.36 

17.49

19.44 

17.05

Chloride 

(Cl)

11.28 

11.00

10.44 

9.87

9.17 

9.59

Fluoride

(F)

Nitrate 

(N03)

0.02 

.05

.03 

.03

.03 

.04
VIRGIN RIVER BASIN Continued

VIRGIN RIVER AT LITTLEFIELD, ARIZ. Continued

Chemical analyses, water year October 1950 to September 1951 Con

Date of collection

Apr. 1-10, 1951- 

Apr. 11-20 -----

May 1-10 

Morr 1 1 9ft

May 21-31 

July 1-10 

July 11-20 ----- 

July 21-31 

Aug. 1-10 ~-

Aug. 11-20 

Aug. 21-31 

Sept. 1-10 , 

Sept. 11-20 

n _!, 04 n/\

' Total or 

weighted averageRunoff 

(acrefeet)

1,510 

1, 690 

3,740 

4,100 

3,450 

2,210

1,290 

1,200 

1,240 

1,170 

1, 180 

3,520

10,450 

1,270 

4,970 

1,980 

1,310 

2,880

99, 930

Silica 

(SiOa) 

ppm

24 

23

24 

27

24 

24

--

Eopiivalents per million

Calcium 

(Ca)

17. 66 

15.37

17.66 

17.66

17.66 

17.47

--

Magnesium 

(Me)

6.09 

7.57

10.28 

10.53

10.53 

10.53

Sodium

(Na)

14 

10.

11. 

11

10. 

10.

-

Potassium 

(K)

85 

92

39 

56

64 

93

~

Bicarbonate 

(HC03)

4.82 

4.88

4.10 

4.65

4.36 

4.80

--

Sulfate

(S04)

23.32 

19.36

24.36 

24.15

23.73 

23.53

Chloride

(Cl)

10.44 

9.59

10.86 

10.94

10.72 

10.58

Fluoride

(F)

Nitrate

(NOj)

0.02 

.03

.01 

.01

.02 

.02
GILA RIVER BASIN

GILA RIVER AT KELVIN. ARIZ.

LOCATION. Just above mouth of Mineral Creek, 1,200 feet upstream from gaging station 

downstream from San Pedro River and 19i miles upstream from Ashurst-Hayden Dam. 

DRAINAGE AREA.--18,000 square miles, of which 5,140 square miles is below Coolidge Dam

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

EXTREMES, 1950-51. Specific conductance: Maximum, 2,460 micromhos Jan. 16, 1951; min

Percent sodium: Maximum, 62 Aug. 8-10; minimum, 22 June 4-10, 11-20, 21-30. 

REMARKS. Records of specific conductance of daily samples available in district offic

for-dissolved solids are sums of determined constituents. Records of discharge for 

given in Water-Supply Paper 1213.

Chemical analyses, December 1950 to September 1951

Date of collection

Dec. 1-10, 1950 

Dec. 11-20 

Dec. 21-31 

Jan. 1-10, 1951 

Jan. 11-20 

Jan. 21-31 

Feb. 1-10 

TToH 1 1 9A

Feb. 21-28 

Mar- 1 1O

Mar. 11-20 

Mar.21-31 

Apr. 1-10 

Apr. 11-19 

Ayr. 20 

Apr. 21-30 

May 11-20 

May 21-31 

Runoff 

(acrefeet)

138 

258 

266 

399 

1,390 

1,760

1,690 

1,740 

1,520 

2,040 

1,980 

2,400

2,400 

1,280 

387 

1,570 

1,100 

512 

112

Silica 

(SiOa) 

ppm

30 

28 

32 

30 

23 

23

28 

28 

28 

29 

30 

35

35 

28

30 

34 

34 

37

Equivalents per million

Calcium 

(Ca)

9.08 

7.19 

7.58 

7.19 

7.49 

7.34

7.58 

7.09 

6.79 

6.74 

6.59 

6.79

7.58 

5.89 

4.44 

5.74 

5.59 

5.29 

8.83

Magnesium 

(Mg)

3.78 

3.54 

3.12 

3.12 

4.03 

3.62

3.54 

3.37 

2.88 

2.96 

3.04 

3.04

3.29 

2.88 

1.64 

2.88 

2.96 

3.21 

3.87

Sodium

(Na)^

9.96 

9.83 

9.52 

9.52 

13.05 

11.61

10.65 

10.52 

10.35 

10.18 

10.96 

10.74

10.70 

12.09 

4 

12.26 

13.05 

13.29 

11.52

Potassium 

(K)

0.17 

.19 

.16 

.15 

.26 

.22

.18 

.17 

.24 

.19 

.15 

.18

.25 

.19 

.04 

.26 

.28 

.26 

.26

Bicarbonate 

(HCO,)

4.33 

4.18 

4.20 

4.33 

4.49 

4.42

4.33 

4.39 

4.29 

4.28 

.31 

.21

.23 

.05 

.83 

3.82 

3.67 

3.90 

4.08

Sulfate 

(S0«)

11.53 

8.87 

9.60 

8.47 

7.66 

7.52

7.25 

6.47 

5.93 

5.66 

5.56 

6.56

7.41 

5.62 

2.52 

5.33 

5.68 

6.70 

10.31

Chloride 

(Cl)

7.22 

7.39 

6.43 

7.28 

12.35 

10.89

10.01 

9.87 

9.59 

9.73 

10.44 

9.87

9.87 

11.28 

2.74 

11.85 

12.27 

12.13 

9.73

Fluoride

(F)

0.09 

.09 

.10 

.10 

.06 

.07

.06 

.06 

.07 

.08 

.08 

.05

.05 

.05

.08 

.08 

.08 

.07

Nitrate 

(N03

0.00 

.00 

.03 

.03 

.04 

.04

.04 

.02 

.03 

.03 

.03 

.03

.03 

.11 

.03 

.04 

.03 

.02 

.02
GILA RIVER BASIN Continued

GILA RIVER AT KELVIN, ARIZ. Continued

Chemical analyses, December 1950 to September 1951 Cont

Date of collection

June 1-10, 1951 

June 11-20 

July 1-3, 8-15 

July 16-20 

July 21-23 

July 24-31 

Aug. 1-7 

Aug. 8-10 

Aug. 11-20 

Aug. 26-28 

Aug. 21-25, 29-31 

Sept. 1-5 

Sept. 6-12 

Sept. 13-20 

Qant 91 3A

Total or 

weighted averageRunoff 

(acrefeet)

18 

12 

13 

33 

449 

1,170 

22 

1,050

15,750 

944 

4,700 

7,130 

2,990 

1,110 

3,510 

2,590 

397

64,820

Silica 

(SiO,) 

ppm

43 

39 

42 

41 

43 

29 

32 

32

36 

46 

28 

25 

28 

28 

21 

24 

32

29

Equivalents per million

Calcium 

(Ca)

15.32 

14.72 

15.07 

13.57 

5.34 

9.73 

8.08 

5.74

5.29 

5.54 

6.84 

2.99 

5.39 

6.49 

2.69 

4.19 

8.03

5.64

Magnesium 

(Mg)

6.00 

5.76 

6.09 

5.43 

2.30 

2.06 

2.30 

1.73

1.89 

2.63 

2.47 

.90 

1.64 

2.14 

.90 

1.56 

3.04

2.22

Sodium 

(Na)

6.17 

5.91 

5.91 

6.44 

5.26 

4.09 

5.91 

2.52

4.35 

14.13 

7.83 

1 

5.57 

6.00 

4.48 

4.78 

7.57

6.96

Potassium 

(K)

0.18 

.21 

.17 

.14 

.20 

.25 

.43 

.28

.26 

.46 

.28 

.92 

.25 

.15 

.20 

.16 

.17

0.23

Bicarbonate 

(HC03)

5.19 

5.26 

4.97 

5.01 

6.87 

3.75 

4.05 

7.26

7.46 

3.72 

3.82 

3.52 

4.16 

3.87 

3.02 

3.34 

4.54

4.85

Sulfate

(SO,)

16.95 

15.41 

16.80 

14.66 

4.66 

10.12 

7.66 

1.79

.87 

4.83 

6.79 

1.29 

4.33 

5.91 

1.81 

3.68 

7.49

4.08

Chloride 

(CD

5.50 

5.64 

5.36 

5.36 

1.55 

2.12 

4.74 

1.16

3.41 

13.68 

6.46 

.96 

4.12 

5.08 

3.44 

3.75 

6.49

5.95

Fluoride 

(F)

0.04 

.05 

.04 

.06 

.05 

.03 

.06 

.04

.04 

.07 

,05 

.03 

.05 

.05 

.05 

.05 

.07

0.05

Nitrate 

(NO

0.04 

.05 

.03 

.04 

.04 

.03 

.04 

.10

.10 

..10 

.05 

.0

.04 

.0

.03 

.0

.0

0.0
GILA RIVER BASIN Continued

GILA RIVER BELOW GILLESPIE DAM. ARIZ.

LOCATION. At gaging station on Gillespie Canal 200 feet downstream from Gillespie Dam, M

DRAINAGE AREA. 49,600 square miles.

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

Water temperatures: December 1950 to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 9,580 micromhos Sept. 30; minimum, 42

Percent sodium: Maximum, 69 Aug. 6-10; minimum, 39 Sept. 1.

REMARKS. Records of specific conductance of daily samples available in district office a

dissolved solids are sums of determined constituents. Samples from canal are believed 

Gillespie Dam including spill and amounts diverted into Gillespie and Enterprise canal

for the river and canals for water year October 1950 to September 1951 given in Water-

Chemical analyses, December 1950 to September 1951

Date of collection

Dec. 21-31 

Jan. 1-10, 1951 

Feb. 5-10 

Feb. 11-20 

Mar. 21-27, 29-31 

Apr. 11-20 

Arir 21 .3H ----- ----

Runoff 

(acrefeet)

791 

890 

974 

1,020 

1,120 

1,280 

734

1,160 

995 

1,350 

1,010 

1,200 

1,120 

1,160 

186

1,040 

1,050 

Q«R

Silica 

(SiO,) 

ppm

32 

30 

30 

32 

28 

29 

16

20 

28 

34 

32 

34 

33 

29 

27

30 

32

37

Equivalents per million

Calcium 

(Ca)

19.26 

19.06 

18.56 

18.96 

17.76 

18.26 

7.78

9.88 

17.56 

18.31 

18.21 

17.91 

18.41 

17.96 

10.08

19.16 

18.86

1S 7R

Magnesium 

(Mg)

12.58 

12.83 

12. 50 

13.98 

13.24 

13.49 

3.70

7.07 

12.50 

12.91 

12.83 

12.83 

12.66 

12.42 

6.58

12.83 

12.83 

19 as

Sodium

(Na)

60.88 

60.44 

59. 57 

61.31 

57.83 

58.70 

16.87

29.74 

56.09 

56.53 

56.96 

57.83 

57.83 

57.40 

30.

60.01 

60.01

RQ 57

Potassium 

(K)

0.08 

.04 

.04 

.19 

.19 

.18

.18 

.24 

.13 

.15 

.15 

.09 

.13 

85

.24 

.23

1R

Bicarbonate 

(HC03)

6.60 

6.57 

6.01 

6.46 

6.19 

6.33 

3.57

3.87 

6.15 

6.29 

6.21 

6.05 

5.38 

5.98 

3.69

6.36 

6.26

R 9Q

Sulfate 

(SO,)

23.94 

23.94 

23.7'3 

24.36 

22.90 

23.32 

7.41

11.70 

21.65 

22.69 

22.90 

22.07 

23.11 

22.48 

12.32

23.53 

23.11

93 39

Chloride 

(Cl)

62.89 

62.05 

61.77 

61.77 

58.38 

59.79 

17.77

30.18 

56.12 

58.10 

59.51 

60.64 

61.20 

59.79 

31.02

60.92 

60.92 

fin rw

Fluoride

(F)

0.08 

.13 

.13 

.13 

.12 

.12

.06 

.11 

.13 

.13 

.13 

.13 

.13 

.06

.12 

.12

19

Nitrate 

(NO,)

0.65 

.63 

.63 

.66 

.68 

.69 

.04

.44 

.65 

.65 

.87 

.71 

.76 

.65 

.42

.35 

.39

34
GILA RIVER BASIIf Continued

GILA RIVER BELOW GILLESPIE DAM, ARIZ.--Continu

Chemical analyses, December 1950 to September 1951 Contin

Date of -collection

May 1-10, 1951 

May 11-20 

May 21-31 

July 1-10 -

July 11-20 

July 28-31 

July 21-27, Aug. 2 -

Aug. 1-3 __ 

Aug. 4-5 _ _ 

Aug. 6-10 

Aug. 16-17 

Aug. 11-15, 18-26 -

Aug. 28-31 _ 

Sept. 1 

Sept. 2 

Sept. 3-4 

Sept. 5-10 

Sept. 21-30 

Total or 

weighted average 

Runoff 

(acrefeet)

912 

853 

779

591 

462 

357 

351 

432 

3,620 

474

821 

8,230 

7,270 

696 

2,410 

1,160 

67, 420 

9,200 

5,040 

2,010 

2,950 

3,440 

1,990

139, 600

Silica 

(SiO,) 

ppm

33 

 37 

39

27 

28 

23 

24 

33 

72 

59

95 

52 

37 

23 

31 

30 

14 

20 

23 

25 

34 

39 

36

25

Equivalents per million

Calcium 

(Ca)

19.26 

18.86 

18.36

17.96 

17.76 

17.47 

17.76 

17.27 

6.49 

15.47

6.49 

2.94 

3.09 

8.18 

18.76 

5.04 

2.74 

2.05 

2.10 

8.33 

20.36 

20.36 

20.06

6.74

Magnesium 

(Mg)

12.83 

12.83 

12.75

13.40 

13.08 

12.91 

12.83 

12.83 

2.96 

10.69

3.78 

.90 

1.07 

5.18 

12.58 

2.14 

.76 

.65 

.79 

4.77 

14.88 

15.21 

16.12

3.95

Sodium 

(Na)

59.14 

60.44 

60.44

59.57 

59.14 

60.01 

60.01 

60.88 

13.87 

50.01

19.00 

3.70 

9.74 

22.22 

56.09 

7.74 

3.35 

1. 

5.96 

22.87 

61.31 

62.62 

65.66

17.70

Potassium 

(K)

0.24 

.17 

.18

.17 

.21 

.15 

.19 

.20 

.25 

.12

.25 

.23 

.15 

.23 

.17 

.23 

.14 

71

.22 

.14 

.24 

.19

0.16

Jicarjonate 

HCO,)

6.10 

6.01 

5.56

5.51 

5.41 

5.13 

5.15 

4.87 

a3.85 

4.29

b4. 13 

c3.10 

3.85 

3.31 

5.74 

4.88 

2.59 

2.74 

2.95 

4.92 

6.95 

6.21 

5.70

3.62

Sulfate 

(S04)

23.53 

23.94 

23.73

23.53 

23.32 

23.73 

24.15 

23.73 

6.04 

20.57

8.39 

1.39 

4.16 

8.74 

22.69 

2.25 

1.46 

.81 

2.52 

8.39 

22.07 

22.90 

24.77

7.00

Chloride

(CD

61.20 

60.92 

60.64

60.92 

60.64 

61.77 

61.48 

61.77 

13.54 

51.89

16.92 

3.10 

6.06 

22 99 

58!66 

7.90 

2.96 

.76 

3.24 

22.28 

65.43 

67.41 

69.10

17.49

Fluoride

(F)

0. 12 

.14 

.13

.12 

.12 

.12 

.12 

.12 

.06 

.11

.07 

.04 

.05 

.05 

.09 

.03 

.03

.07 

.09 

.11 

.12

0.06

Nitrate 

(NO,)

0.35 

.39 

.37

.77 

.68 

.58 

.71 

.50 

.09 

.37

.23 

.01 

.05 

.13 

.39 

.02 

.05 

.10 

.10 

.19 

.42 

.45 

.60

0.18

a Includes 0. 60 equivalents per million of carbonate (CO,), 

b Includes 0. 87 equivalents per million of carbonate (CO,), 

c Includes 0.23 equivalents per million of carbonate (CO,).
GILA RIVER BASIN Continued

SALT RIVER AT STEWART MOUNTAIN DAM, ARIZ.

LOCATION. Just below dam, 3i miles above gaging station below-Stewart Mountain Dam, which 

/ Maricopa County. >

DRAINAGE AREA.--6,240 square miles, above gaging station.

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

Water temperatures: December 1950 to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 2,490 micromhos Aug. 20; minimum, 1,11

Percent sodium: Maximum, 76 July 21-31, Aug. 11-20, Aug. 21-28; minimum, 65 Jan. 11-20, 

REMARKS. Records of specific conductance of daily samples available in district office at 

dissolved solids concentrations are residue on evaporation. Discharge records for gagi

water year October 1950 to September 1951 given in Water-Supply Paper 1213. No appreci

gaging station except during periods of heavy rains.

Chemical analyses, December 1950 to September 1951

Date of collection

Dec. 9-20, 1950 

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 

Apr. 1-10 

Apr. 11-20 - 

Apr. 21-30 

May 1 10 -- __ _ _

May 11-20 

mfair 91 11

Runoff 

(acrefeet)

8,230 

3,070 

204 

242

220 

272 

2,630 

6,480 

18,400 

22, 390

12, 700 

16, 980 

8,020 

5,030 

5,760 

13,950

Silica 

(810.) 

ppm

11 

13 

14 

14

14 

14 

12 

12 

11 

12

12 

10 

10 

14 

14 

12

Equivalents per million

Calcium

(Ca)

2.64 

2.74 

2.94 

2.84

2.89 

2.89 

2.84 

2.79 

2.99 

3.09

2.99 

2.99 

2.99 

3.04 

3.04 

2.94

Magne - 

sium 

(Mg)

1.40 

1.40 

1.48 

1.56

1.64 

1.56 

1.40 

1.40 

1.56 

1.64

1.64 

1.64 

1.64 

1.73 

1.73 

1.64

Sodium

(Na)

8.52 

8.39 

8.65 

8.57

8.65 

9.04 

9.35 

9.39 

10.87 

12.26

12.87 

12.44 

12.35 

12.39 

12.22 

12.09

Potassium 

(K)

0. 13 

.18 

.18 

.20

.18 

.17 

.13 

.15 

.15 

.16

.17 

.18 

.17 

.18 

.16 

.18

Bicarbonate 

(HC03)

2.74 

2.85 

3.00 

2.98

2.97 

3.00 

2.95 

2.93 

3.02 

3.15

3.20 

3.18 

3.20 

3.28 

3.21 

3.18

Sulfate

(S0<)

1.00 

1.02 

.94 

1.02

1.23 

1.15 

1.08 

1.12 

1.21 

1.31

1.33 

1.31 

1.29 

1.33 

1.31 

1.29

Chloride

(ci)

8.74 

8.74 

9.03 

9.03

9.03 

9.73 

9.87 

9.87 

11.42 

12.97

13. 11 

12.83 

12.69 

12.83 

12.69 

12.69

Fluoride

(F)

0.02

:o2

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02

Nitrate 

(N03)

0.05 

.03 

.03 

.03

.-03 

.05 

.05 

.05 

.05 

.04

.03 

.03 

.03 

.02 

.03 

.02

a Computed as sum of dissolved constituents.
GILA RIVER BASIN Continued

SALT RIVER AT STEWART MOUNTAIN DAM, ARIZ. Continu

Chemical analyses, December 1950 to September 1951 Continu

Date of collection

June 1-10, 1951 

June 11-20 

July 1-10 

July 11-20 

July 21-31 

Aug. 1-10- -- 

Aug. 11-20 

Aug. 21-28 

Aug. 29-31, Sept. 1-10

Sept. 21-30 

Total or 

weighted average -

Runoff 

(acre-- 

feet)

21,440 

23, 690 

28, 800 

26, 730 

33, 240 

26, 340

11, 300 

28, 280 

20, 480 

613 

186 

172

345, 800

Silica 

(SiQ.) 

ppm

12 

11 

11 

14 

25

22 

20 

21 

18 

21 

21

18

Equivalents per million

Calcium

(Ca)

2.94 

2.94 

2.99 

2.94 

2.89 

2.40

2.89 

3.04 

2.99 

1.95 

2.05 

2.20

2.89

Magnesium 

(Mg)

1.64 

1.64 

1.73 

1.73 

1.81 

1.89

1.89 

2.06 

2.14 

1.07 

1.23 

1.32

1.73

Sodium 

(Na)

12.05 

12.26 

12.48 

12.78 

13.09 

13.96

14.22 

16.52 

16.61 

7.31 

7.52 

8.44

12.91

Potassium 

(K)

0.17 

. 17 

.14 

.17 

.18 

.20

.18 

.21 

.23 

.20

.20

0.18

Bicarbonate 

(HC03)

3.16 

3.13 

3.11 

3.13 

3.15 

2.90

3.03 

2.95 

2.87 

1.84 

1.93 

2.18

3.06

Sulfate 

(SOJ

1.31 

1.29 

1.31 

1.33 

1.37 

1.46

1.35 

1.62 

1.67 

.92 

.94 

.96

1.35

Chloride

(ci)

12.55 

12.69 

12.69 

13.26 

13.40 

13.96

14.52 

16.92 

17.20 

7.61 

7.76 

8.69

13.31

Fluoride 

(F)

0.02 

.02 

.02 

.02 

.02 

.03

.03 

.03 

.03 

.03

.03

0.02

Nitrate 

(N03)

0.03 

.03 

.02 

.02 

.02 

.07

.03 

.04 

.05 

.04 

.05 

.08

0.03

a Computed as sum of dissolved constituents.
GILA RIVER BASIN Continued

VERDE RIVER BELOW BARTLETT DAM, ARIZ.

LOCATION. At gaging station 2J miles downstream from Bartlett Dam, Maricopa County, and 

DRAINAGE AREA. 6,160 square miles.

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

Water temperatures: December 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 725 micromhos June 28; minimum, 251 m

Percent sodium: Maximum, 31 July 21-31; minimum, 14 Sept. 11-20.

REMARKS. Records of specific conductance of daily samples available in district office a

reported for dissolved solids concentrations are residue on evaporation. Records of d

to September 1951 given in Water-Supply Paper 1213.

Chemical analyses, December 1950 to September 1951

Date of collection

Dec. 11-20, 1950 

Jan.- 1-10, 1951 

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

Jan. 21-31 ----- -

Feb. 1-10 

VAH 91 9Q

Mar. 1-10 . -----

Mar. 11-20 

Apr. 1-10 

May 1-10 -- ---

May 11-20 

May 21-31 ------

Runoff 

(acrefeet)

2,910 

8,640 

4,120 

4,080 

4,340

2,350 

5,120 

3,380 

5,580 

8,700 

4,660

1,760 

4,150 

4,150 

8,470 

6,710 

5,990

Silica 

(3iOa ) 

ppm

22 

23 

22 

22 

22

20 

24 

24 

24 

24 

26

22 

24 

24 

26 

23 

24

Equivalents per million

Calcium 

(Ca)

2.20 

2.40 

2.15 

2.15 

2.15

2.35 

2.20 

2.40 

2.40 

2.50 

2.40

2.30 

2.20 

2.25 

2.10 

2.10 

2.20

Magnesium 

(Mg)

3.21 

3.12 

3.21 

3.12 

3.04

2.86 

3.12 

3.12 

2.88 

3.04 

2.88

2.96 

3.04 

3.04 

2.96 

2.47 

2.71

Sodium 

(Ha)

1.74 

1.65 

1.70 

1.65 

1.61

1.52 

1.57 

1.52 

1.48 

1.39 

1.43

1.39 

1.43 

1.74 

1.74 

1.39 

1.57

Potassium 

(K)

0.08 

.07 

.16 

.16 

.13

.14 

.15 

.17 

.13 

.15 

.11

.18 

.11 

.13 

.09 

.12 

.08

Bicarbonate 

(HCO,)

4.70 

4.92 

4.77 

4.74 

4.70

4.67 

4.70 

4.83 

4.79 

4.70 

4.69

4.61 

4.59 

4.67 

4.47 

4.11 

4.38

Sulfate 

(S04)

1.67 

1.54 

1.52 

1.46 

1.39

1.39 

1.50 

1.52 

1.37 

1.44 

1.37

1.48 

1.52 

1.62 

1.58 

1.25 

1.46

Chloride 

(Cl)

0.87 

.79 

.76 

.76 

.71

.68 

.79 

.76 

.71 

.76 

.71

.71 

.68 

.76 

.79 

.62 

.71

Fluoride 

(F)

0.02 

.02 

.02 

.01 

.02

.02 

.02 

.02 

.02 

.02 

.02

.02 

.02 

.02 

.02 

.02 

.02

Nitrate

(NO,)

0.02 

.02 

.01 

.00 

.00

.01 

.02 

.02 

.01 

.02 

.01

.01 

.02 

.01 

.01 

.02 

.02
GILA RIVER BASIN Continued

VERDE RIVER BELOW BARTLETT DAM, ARIZ.--Continu

Chemical analyses, December 1950 to September 1951 Contin

Date of collection

June 1-10, 1951 

July 1-10 

July 11-20 

July 21-31 

Aug. 1-10 

Aug. 11-20 

Ang, 21-31 

Sept. 1-10 

oA«o- 1 1 on

Sept. 21-30 

Total or 

weighted averageRunoff 

(acrefeet)

1,950 

1,680 

1,970 

2,440. 

1,610 

1,720

1,610 

2,500 

2,760 

9,870 

33,000 

16,240

162,700

Silica 

(SiOa) 

ppm

29 

33 

26 

24 

27 

29

33 

33 

24 

20 

22 

22

23

Equivalents per million

Calcium 

(Ca)

2.25 

2.20 

2.10 

2.00 

2.00 

1.75

1.95 

2.15 

2.20 

1.50 

1.60 

1.70

2.00

Magnesium 

(Mg)

3.12 

3.21 

3.29 

3.29 

3.37 

3.12

2.96 

2.96 

2.47 

.90 

.90 

1.15

2.22

Sodium 

(Na)

2.04 

2.09 

2.22 

2.22 

2.09 

2.30

2.09 

1.87 

1.74 

.61 

.43 

.52

1.22

Potassium 

(K)

0.13 

.14 

.15 

.14 

.15 

.16

.18 

.18 

.16 

.12 

.13 

.11

0.13

Bicarbonate 

(HCOS)

.63 

.68 

.63 

.42 

.39 

.97

.18 

.42 

.08 

2.20 

2.31 

2.65

3.79

Sulfate 

(S04)

1.89 

2.04 

2.12 

2.21 

2.23 

2.21

2.00 

1.79 

1.60 

.52 

.44 

.56

1.17

Chloride 

(Cl)

0.85 

.93 

.99 

1.04 

1.07 

1.04

.85 

.82 

.73 

.23 

.20 

.24

0.56

Fluoride 

(F)

0.02 

.01 

.02 

.02 

.02 

.03

.03 

.02 

.02 

.03 

.02 

.02

0.02

Nitrate 

(NO,)

0.02 

.02 

.01 

.01 

.01 

.02

.02 

.02 

.03 

.09 

.05 

.02

0.03
GILA RIVER BASIN Continued

OUTFLOW FROM LAKE PLEASANT, ARIZ.

LOCATION. At water-stage recorder on Canal Ij miles downstream from Lake Pleasant Dam 

from New River and 19 miles north of Narinette, Maricopa County.

DRAINAGE AREA. 1,460 square miles (above Lake Pleasant).

RECORDS AVAILABLE. December 1950 to September 1951.

REMARKS. Records of specific conductance of daily samples available in district office 

reported for dissolved/ solids concentrations are residue on evaporation. Records of 

Lake Pleasant Dam for water year December 1950 to September 1951 given in Water-Supp

no discharge is shown were collected at surface of lake at the dam during periods of 

canal during period .was Aug. 24-27.

Chemical analyses, December 1950 to September 1951

Date of collection

Dec. 8, 14, 21,

M iORn _

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

Total or

weighted average

Runoff

(acrefeet)

_

--

_

__

4K4

453

Silica

(SiOs) 

ppm

19

11

8

0

9.2

9.3

8.5

7.4

13

1^

12

29

Equivalents per million

Calcium

(Ca)

3 A4

4.04

2.20

2.20

2.89

3.19

3.49

3.49

2

AR

1

TK

1.55

Magnesium

(Mg)

3.54

3.62

1.64

1.81

2.14

2.63

2.88

3.21

.74

.45

Sodium

(Na)

5 O1

5.96

2 99

2.74

3.26

3.52

4.26

4.61

1 99

.57

.43

Potassium

(K)

0.20

.16

1^

.15

.18

.16

.18

.21

.12

.08

Bicarbonate

(HCO,)

B

OO

6.57

2 95

2.67

3.61

4.48

4.92

5.06

7 IW

7 AA

1.85

Sulfate

, (SO,)

1

QO

2.02

2 HA

2.04

2.23

2.48

2.79

3.00

.67

M

.42

Chloride

(Cl)

4.77

4.91

1 M

2.17

2.48

2.71

3.27

3.27

.71

.39

.14

Fluoride

(F)

0.02

.02

.02

-.02

.02

.02

.02

.04

.02

.03

Nitrate

(NO,)

0.02

.05

.10

.03

.02

.01

.00

.01

.01

.01

.04
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 3

DRAINAGE AREA. 6,270 square miles above gaging station. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951. Specific conductance: Maximum, 3,710 micromhos Sept. 24

Percent sodium: Maximum, 60 Sept. 11-20; minimum, 48 Mar. 22-31.

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

available in regional office at Salt Lake City, Utah. Records of discharge for water yea

Water-Supply Paper 1214.

Chemical analyses, March to September 1951

Date of collection

Mar. 22-31, 1951 

Apr. 1-10 

Apr. 11-17, 19-20 

May 11-20 

May 21-31 a 

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

June 21-30 

July 1-10 - --

July 11-20 

July 21-31 

Aug. 1-10 

Autr 21-31 ____

Runoff

(acrefeet)

914 

988 

1,720 

349 

7,840

10,450 

10, 010 

6,660 

9,280 

6,300 

8,770

12,020 

11, 060 

3,790 

3,220 

5,770 

R nan

Silica 

(SiOa) 

ppm

20 

17 

21

29

29

28 

27 

29

26 

25 

25 

27 

26

27

Equivalents per million

Calcium 

(Ca)

5.24 

5.09 

4.89

4.39

4.49

4.39 

4.19 

4.19

4.14 

4.09 

4.04 

4.19 

3.79

A (M

Magnesium 

(Mg)

7.89 

7.81 

7.89

7.57

7.81

7.89 

7.89 

7.89

8.14 

8.31 

8.55 

8.72 

8.80

fl 30

Sodium'

(Na)

12.13 

12.57 

12.87

14.78

16.05

15.52 

15.61 

15.31

16.39 

16.83 

16.96 

17.78 

18.35

1« 7O

Potassium 

(K)

0.23 

.28 

.41

--

--

.26 

.26 

.26

.26 

.31 

.20 

.31 

.31

31

Bicarbonate 

(HCO,)

5.31 

5.11 

5.10

5.15

5.29

5.05 

4.88 

4.79

4.82 

4.82 

4.72 

4.62 

4.72

A «2

Sulfate 

(S04)

7.70 

7.74 

7.97

8.81

9.20

9.18 

9.01 

9.14

9.62 

9.81 

9.85 

10.45 

10.39 

in Ai

Chloride

(Cl)

12.69 

12.83 

12.97

13.11

13.82

13.68 

13.82 

13.96

14.52 

15.17 

15.51 

16.41 

16.58

Ifi RA

Fluoride

(F)

0.00 

.00 

.01

--

.02 

.02 

.02

.02 

.02 

.02 

.01 

.01 

ni

Nitrate 

<N03)

0.04 

.03 

.06

.16

.16

.26 

.26 

.26

.26 

.26 

.23 

.08 

.09 

no

B

a Not included for computation of weighted averages.
Sept. 1-10 ....

Sept. 11-20 --. --

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

Total or

weighted average 

4,210

3,720

2,480

(b)

9A

oe

91

27

3 QQ

3 QQ

4 4Q

4.24

8

00

9 1 9

9.54

8.22

20.05

16.57

.31

4A

0.28

5.01

4.93

10.60 

10. 74

10.81

9.60

17.20 

17.91

1 Q A1

14.86

.01

0.02

n

.0

0.1

b For computation of the weighted averages the total discharge corresponding to 98,110 acre-feet was used. 

October 1950 to September 1951.

This r
Part 11. PACIFIC SLOPE BASINS IN CALIFORNIA

SAN JOAQUIN RIVER BASIN

SAN JOAQUIN RIVER MAIN STEM

SAN JOAQUIN RIVER NEAR VERNALIS, CALIF.

LOCATION. At gaging station in El Pescadero Grant, at Durham Ferry highway bridge, 3 mile

miles northeast of Vernalis, San Joaquin County. 

DRAINAGE AREA. 14,010 square miles. 

RECORDS AVAILABLE. Chemical analyses: Single sample Dec. 2, 1950, daily samples March t

Water temperatures: Single sample Dec. 2, 1950, daily samples March to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 851 micromhos Aug. 3; minimum, 81.8 m

Percent sodium: Maximum, 50 July 11-20, Sept. 11-20; minimum, 35 May 23-31.

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

in district office at Sacramento, Calif. Records of discharge for water year October 

Paper 1215.

Chemical analyses, December 1950 to September 1951

Date of collection

DA** 9 1 Q 5ft

Mar. 1-10, 1951 

Mar. 11-20 

Mar. 21-30 

Mar. 31, Apr. 1-10 

Apr. 11-12 

Apr. 13-20 ,- -

Apr. 21-22, 27-28 - 

Apr. 23-26, 29-30 

May 1 10

May 11-20 ~ 

May 21-22 

Maw 23-31 

Runoff 

(acrefeet)

21,420 

174, 600 

155,200 

138, 400 

65, 870 

7,220 

47, 920 

15, 290 

31, 160

113, 700 

77, 380 

22,450

1R7 BOO

Silica 

(SiOa) 

ppm

13 

19 

19 

17 

21 

24 

20 

24 

21

18 

20

13

Equivalents per million

Calcium 

(Ca)

0.50 

.70 

.80 

.80 

1.40

1.00 

1.50 

1.05

.65 

.90

3R

Magnesium 

(Mg)

0.35 

.53 

.60 

.67 

1.15

.77 

1.23 

.79

.45 

.66

2R

Sodium 

(Na)

0. 

0.91 

1.09 

.13 

2.

1. 

2. 

1.

.78 

1.26

3R

Potassium 

(K)

54 

0.09 

.10 

.11 

41

>9 

58 

70

.07 

.07

05

Bicarbonate 

(HCOS)

0.84 

1.03 

1.15 

1.10 

1.64 

1.98 

1.33 

1.87 

1.39

.98 

1.20 

.98

Rfi

Sulfate 

(S04)

0.21 

.37 

.48 

.50 

.85 

1.02 

.48 

.75 

.48

,21 

.42 

.29 

11

Chloride 

(Cl)

0.42 

.79 

.99 

1.04 

2.43 

3.41 

1.64 

2.65 

1.64

.71 

1.24 

.99

34

Fluoride 

(F)

0.02 

.02 

.01 

.01 

.01 

.01 

.02 

.01

.01 

.01

ni

Nitrate 

(NO,)

0.03 

.01 

.01 

.01 

.03 

.04 

.02 

.03 

.02

.02 

.02

01

a Sum of determined constituents.
June 1-3 

June 4-5--- 

June 6-15 - 

June 16-20- 

June 21-23- 

June 24-29-

June 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 ..........

Xotal -- 

45,680

14,420

52,540

38,220

19, 740

25,310

25,310

17, 780

13,130

11,350

14, 790

20,560

19, 960

18,450

23,160

bl,418,000

1.10

1.35

2.10

2.10

2.05

2.30

2.15

2.05

1.95

2.00

1.90

.82

1.07

1.56

56

56

56

48

48

40

40

1.40

1.83

2.22

3.65

3.74

3.48

3.52

3.57

3.48

3.30

3.50

3.22

12

 .75

1.18

1.44

.72

.95

1.61

2.36

2.52

2.49

2.62

2.69

2.65

2.62

2.62

2.61

.51

1.02

1.75

.68

1.02

2.37

4.00

4.06

4.26

4.20

3.84

3.64

3.30

3.41

3.19

.01

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

a Sum of determined constituents.

b Represents 30 percent of runoff for water year October 1950 to September 1951.
CALAVERAS RIVER BASIN

STOCKTON DIVERTING CANAL AT STOCKTON, CALIF.

LOCATION. Just upstream from bridge on Sanguinetti Lane, at north edge of Stockton, Sa

Franceses Grant and about 200 feet upstream from gaging station. 

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

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

available in district office at Sacramento, Calif. Records of discharge for water y

given in Water-Supply Paper 1215. Many days in November, April to July, and entire 

September reported no flow.

Chemical analyses, March to July 1951

Date of collection

Mar. 1-10, 1951 

Mar. 11-17, 19-20 

Mar. 21-31 

Apr. 1-5, 7-9 

Apr. 30, May 1-2, 54

June 14-16, 18-19 

June 21, 23-24, 26, 28

July 13, 15, 23-24 

Runoff

(acrefeet)

28,030

7,910

2

0AA

108

18

114

48

88

Silica

(SiOa)

ppm

21

23 

24

91

18

26

23

18

Equivalents per million

Calcium

(Ca)

0.70

.80 

an

1

AR

1.25

1.15

1.15

1.20

Magnesium

(Mg)

0.58

.62 

.70

fit

.90

.75

.77

.81

Sodium

(Na)

0.22

.24

.27

.30

.31

.37

.37

.39

Potassium

(K)

0.08

.07 

.07

.11

.12

.06

.06

.07

Bicarbonate

(HCO,)

1.31

1.44

1

C 17

1.72~

1.93

1.95

1.97

2.02

Sulfate

(S04)

0.21

.25 

31

31

.40

.25

.27

.27

Chloride

(Cl)

0.10

.11

1 9

1 A

.23

.13

.16

.17

Fluoride

(F)

0.02

.02

no

no

.01

.02

.02

.02

Nitrate

(NO,)

0.01

.01 

.01

.02

.01

.01

.02
MOKELUMNE RIVER BASIN 

MOKELUMNE RIVER AT WOODBRIDGE, CALIF.

LOCATION. At dam of Woodbridge Irrigation District, San Joaquin County, 0.4 mile upst

DRAINAGE AREA. 644 square miles above gaging station. 

RECORDS AVAILABLE. Chemical analyses: Single sample Dec. 1, 1950, daily samples Marc

Water temperatures: Single sample Dec. 1, 1950, daily samples March to September 19

EXTREMES, 1950-51. Specific conductance: Maximum, 74.1 micromhos Sept. 4; minimum, 3

Percent sodium: Maximum, 22 June 1-10; minimum, 14 Apr. 1-20. i

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

available in district office at Sacramento, California. Records of discharge for w

given in Water-Supply Paper 1215.

Chemical analyses, December 1950 to September 1951

Date of collection

Dec. 1, 1950 

Mar. 1-10, 1951 

Mar. 11-20 

Apr. 1-10 

Apr. 11-20 

Apr. 21-30 

Mov 1 31

June 1-10 

July 1-10 

July 11-20 

Aug. 1-10 

Aug. 11-20 

Aug. 21-31 

Sept. 1-10 

Sept. 11-20 

Qant 9 1 3O

Total 

Runoff 

(acrefeet)

4,720 

27, 610 

33, 520 

35, 840

10,770 

16,070 

20, 020 

82,800

14,830 

6,830 

1,410 

397 

462 

522

474 

458 

526 

643 

4,420 

6,240

a 268, 600

Silica 

(Si03 ) 

ppm

8.3 

14 

13 

13

12 

12 

13 

13

12 

12 

12 

12 

12 

13

13 

12 

11 

12 

11 

11

Equivalents per million

Calcium 

(Ca)

0.30 

.31 

.31

.31 

.30 

.30 

.28

.25 

.27 

.30 

.31 

.32 

.27

.27 

.28 

.27 

.29 

.23 

.23

Magnesium 

(Mg)

0.19 

.17 

.20

.21 

.19 

.17 

.16

.13 

.12 

.13 

.14 

.16 

.17

.17 

.18 

.17 

.19 

.16 

.25

Sodium 

(Na)

0.13 

.12 

.11

.10 

.10 

.11 

.10

.13 

.12 

..12 

.13 

.13 

.09

.09 

.09 

.09 

.09 

.10 

.11

Potassium 

(K)

0.13 

.10 

.09

.09 

.09 

.06 

.03

.07 

.07 

.06 

.08 

.08 

.05

.05 

.06 

.04 

.05 

.04 

.04

Bicarbonate 

(HC03)

0.31 

.52 

.49 

.48-

.48 

.46 

.48 

.43

.41 

.41 

.43 

.44 

.38 

.39

.39 

.33 

.29 

.29 

.39 

.38

Sulfate

(S04)

0.09 

.13 

.11 

.10

.10 

.08 

.08 

.07

.07 

.07 

.08 

.11 

.23 

.14

.15 

.21 

.23 

.25 

.11 

.15

Chloride 

(Cl)

0.06 

.08 

.08 

.06

.06 

.06 

.06 

.05

.05 

.05 

.06 

.06 

.06 

.07

.06 

.07 

.07 

.06 

.05 

.05

Fluoride

(F)

0.02 

.02 

.02

.02 

.02 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01

Nitrate 

(N03

0.01 

.01 

.01 

.01

.01 

.01 

.01 

.01

.01 

.00 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.00 

.00

a Represents 30 percent of runoff for water year October 1950 to September 1951.
SACRAMENTO RIVER BASIN

SACRAMENTO RIVER MAIN STEM 

SACRAMENTO RIVER AT KNIGHTS LANDING, CALIF

LOCATION. At gaging station at Yolo-Sutter County line, just upstream from Southern Pac

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951. Specific conductance: Maximum, 383 micromhos May 27

-Percent sodium: Maximum, 37 May 11-31, June 11-20; minimum, 21 Mar. 21-31, Apr. 11-20

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

in district office at Sacramento, Calif. Records of discharge for water year October 

Paper 1215.

Chemical analyses, March to September 1951

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 ~

July 1-10 

July 11-20 ----- 

July 21-31 

Aug. 1-10 ~ 

Aug. 11-20 

Aug. 31-31 

Runoff 

(acrefeet)

353,700 

290, 800 

259,200 

96,750 

72, 120 

118,800 

99, 310

185, 200 

281, 100 

105, 500 

114, 500 

108, 300

115,000 

146, 700 

192, 400 

174, 800 

169, 600 

179, 700

Silica 

(SiOa) 

ppm

24 

25 

24 

24 

24 

23 

26

25 

25 

26 

26 

25

26 

24 

16 

16 

16 

16

Equivalents per million

Calcium 

(Ca)

0.70 

.70 

.70 

.75 

.90 

.80 

,75

.70 

.90 

.75 

.75 

.75

.75 

.70 

.65 

.65 

.70 

.70

Magnesium 

(Mg)

0.53 

.54 

.58 

.64 

.82. 

.72 

.73

.71 

.90 

.78 

.78 

.74

.75 

.67 

.65 

.64 

.67 

.74

Sodium 

(Na)

0.38 

.39 

.36 

OH 

.( 

.43 

.70

.70 

1.09 

.87 

.96 

.87

.87 

.83 

.70 

.70 

.74 

.83

Potassium 

(K)

0.09 

.08 

.08 

2 

8 

.14 

.07

.05 

.06 

.07 

.08 

.07

.05 

.07 

.05 

.07 

.66 

.06

Bicarbonate 

(HCO,)

1.26 

1.28 

1.31 

1.41 

1.61 

1.52 

1.54

1.44 

1.85 

1.69 

1.67 

1.67

1.67 

1.52 

1.43 

1.46 

1.52 

1.67

Sulfate 

(S04)

0.25 

.25 

.25 

.20 

.46 

.31 

.40

.42 

.58 

.46 

.50 

.44

.44 

.40 

.33 

.40 

.40 

.40

Chloride 

(Cl)

0.17 

.17 

.14 

.18 

.31 

.24 

.31

.31 

.48 

.34 

.39 

.,31

.34 

.28 

.26 

.25 

.27 

.31

Fluoride

(F)

0.02 

.02 

.02 

.01 

.02 

.02 

.01

.01 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01

Nitrate 

(N03

0.01 

.01 

.01 

.01 

.01 

.01 

.01

.01 

.01 

.00 

.01 

.01

.01 

.01 

.01 

.01 

.01 

.01
Sept. 1-10 

Sept. 11-20 

Sept. 21-30 

Total 

122, 800

,Q en A fi/\n

17

17

15

.80

.70

QO

QO

.72

.91

ft 1?

.61

f\O

.07

.07

1

00

1.59

.40

49

.27

14

O_4

.24

.01

.01

.01

.01

.01

.01

a Represents 43 percent of runoff for water year October 1950 to September 1951.

FEATHER RIVER BASIN 

FEATHER RIVER AT NICOLAUS, CALIF.

LOCATION. At gaging station at Nicolaus, Sutter County, 0.4 mile downstream from high

RECORDS AVAILABLE. Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951. Specific conductance: Maximum, 189 micromhos Aug. 

Percent sodium: Maximum, 17 July 11-20; minimum, 8 June 21-30.

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

available in district office at Sacramento, Calif. Records of discharge for water 

given in Vater-Supply Paper 1215.

Chemical analyses, March to September 1951

Date of collection

Mar. 1-10, 1951 

Mar. 11-20 

Mar. 21-31 

Apr. 1-10 

Apr. 21-30 

May 1-31 

June 1-10 

July 1-10 

July 11-20 

.Tiilv 21 -31 _________

Runoff 

(acrefeet)

289,400 

277, 700 

303,700 

255, 700 

271,100 

202, 800

671,100 

69,200 

33, 240 

23,810 

13,000 

8,370

7 R9.n

Silica 

(SiO.,) 

ppm

16 

17 

15 

15 

15 

15

15 

17 

19 

19 

20 

20

19

Equivalents per million

Calcium

(Ca)

0.47 

.44 

.43 

.42 

.39 

.39

.40 

.50 

.55 

.60 

.70 

.75

7S

Magnesium 

(Mg)

0.35 

.34 

.30 

.29 

.26 

.26

.28 

.34 

.39 

.44 

.57 

.60

Sfl

Sodium 

(Na)

0.16 

.14 

.14 

.11 

.11 

.12

.13 

.17 

.17 

.10 

.20 

.29

9.R

Potassium 

(K)

0.08 

.07 

.12 

.14 

.07 

.03

.04 

.03 

.04 

.05 

.05 

.05 

ns

Bicarbonate 

(HCOa)

0.85 

.80 

.77 

.75 

.70 

.67

.69 

.92 

1.02 

1.08 

1.25 

1.39

1 33

Sulfate 

(S04)

0.13 

.11 

.09 

.07 

.08 

.09

.08 

.08 

.10 

.10 

.14 

.16

IK

Chloride 

(Cl)

0.08 

.07 

.04 

.05 

.02 

.04

.05 

.07 

.08 

.08 

.09 

.15 

11

Fluoride 

(F)

0.01 

.01 

.00 

.00 

.01 

.01

.00 

.01 

.01 

.01 

.01 

.01 

m

Nitrate 

(N0a)

0.01 

.01 

.01 

.01 

.01 

.00

.01 

.00 

.01 

.01 

.01 

.01 

ni
FEATHER RIVER BASIN Continued 

FEATHER RIVER AT NICOLAUS, CALIF.--Continued 

Chemical analyses, March to September 1951--Continued

Date of collection

Aug. 1-10,1951 

Aug. 11-20 

Am* O1 9.1

Sept. 1-10 -------

Total 

Runoff

(acrefeet)

4,930 

5,210

9,570

20, 830

30, 230 

37,470

a2, 535, 000

Silica

(S10a)

ppm

20

OA

1Q

1Q

16

16

Equivalents per million

Calcium

(Ca)

0.80

on

TK

.65

Magnesium

(Mg)

0.66

ftQ

A/)

.55

.51

Sodium

(Na)

0.30

.24

OQ

Potassium

(K)

0.05 

04

.05

AC

Afl

Bicarbonate

(HC03)

1.49

1 4Q

1

QQ

1 9ft

1

9ft

1 9ft

Sulfate

(S04)

0.17

1Q

1 ft

.14

.11 

.11

 "

Chloride

(CD

0.12

19

.10

.08

.06

.07

Fluoride

(F)

0.01 

.01

.01

.01

.01

.01

Nitrate

(NO,)

0.01 

.01

.01

.00

.01

.01

a Represents 29 percent of runoff for water year October 1950 to September 1951.

AMERICAN RIVER BASIN 

AMERICAN RIVER AT FAIR OAKS, CALIF.

LOCATION. From Mar. 2 to Apr. 27 samples were collected at gaging station at Sacramento 

Sacramento County, 6.5 miles upstream from mouth. From May 3 to Sept. 30 samples were 

Sacramento County, 10 miles downstream from South Fork. 

DRAINAGE AREA. 1,921 square miles. 

RECORDS AVAILABLE. Chemical analyses: January to December 1906, March to September 1951

Water temperatures: March to September 1951. 

EXTREMES, March to September, 1951. Specific conductance: Maximum, 112 micromhos Aug. 2

Percent sodium: Maximum, 19 Apr. 21-27, June 11-20, July 11-20; minimum, 10 Mar. 21-31

REMARKS. Discharge data for Mar. 2 to Apr. 27 are for the Sacramento gaging station. Va

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

Discharge records for gaging stations at Sacramento and at Fair.Oaks, for water year O

Water-Supply Paper 1215. 
Chemical analyses, March to September 1951

Date of collection

Mar. 2-10, 1951 

Mar. 21-31 - 

Apr. 1-10 ----- 

Apr. 11-20 ---- 

Apr. 21-27 

May 3-10 

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 

Runoff 

(acrefeet)

141, 700 

131,000 

139,900 

127, 700 

162, 300 

83,410

131,000 

305, 700 

63, 290 

53,180 

32,850

18,040 

11,270 

9,030 

6,290 

5,710 

6,080

5,610 

4,970 

5,590

11,445,000

Silica 

(Si02 ) 

ppm

16 

16 

13 

12 

12 

12

13 

12 

12 

11 

12

15 

16 

15 

15 

14 

14

13 

12 

12

Equivalents per million

Calcium 

(Ca)

0.37 

.34 

.31 

.29 

.24 

.26

.27 

.22 

.28 

.28 

.04

.48 

.50 

.47 

.55 

.55 

.55

.55 

.50 

.50

Magnesium 

(Mg)

0.29 

.25 

.18 

.16 

.17 

.17

.21 

.15 

.13 

.12 

.15

.18 

.21 

.27 

.27 

.28 

.27

.28 

.29 

.28

Sodium 

(Na)

0.13 

.13 

.06 

.09 

.06 

0.

.09 

.08 

.10 

.11 

.11

.15 

.18 

.14 

.14 

.14 

.15

.14 

.17 

.17

Potassium 

(K)

0.05 

.05

.07 

10

.09 

.04 

.06 

.05 

.07

.06 

.07 

.06 

.06 

.06 

.06

.06 

.05 

.06

Bicarbonate 

(HCO,)

0.67 

.66 

.54 

.48 

.36 

.44

.48 

.38 

.43 

.44 

.51

.64 

.70 

.75 

.82 

.82 

.80

.80 

.82 

.82

Sulfate 

(S04)

0.11 

.10 

.06 

.05

.05

.06 

.04 

.05 

.06 

.06

.08 

.09 

.08 

.09 

.09 

.09

.10 

.10 

.10

Chloride 

(Cl)

0.08 

.07 

.05 

.05 

.03 

.04

.04 

.04 

.05 

.06 

.08

.07 

.10 

.12 

.12 

.14 

.16

.14 

.14 

.14

Fluoride

(F)

0.02 

.02 

.00 

.00 

.01 

.01

.02 

.01 

.00 

.01 

.01

.01 

.01 

.01 

'.01 

.01 

.01

.01 

.01 

.01

Nitrate

(NO

0.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

a Represents approximately 31 percent of runoff for water year October 1950 to September 1951.
Part 12, PACIFIC SLOPE BASINS IN WASHINGTON AND UPPER COLUMB

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 g

upstream from Nespelem River.

DRAINAGE AREA. 74,100 square miles (above gaging station). 

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

Water temperatures: November 1950 to September 1951. 

EXTREMES, 1950-51. Specific conductance: Maximum, 164 micromhos May 10; minimum, 136 

Percent sodium: Maximum, 9 Feb. 21-28; minimum, 4 Dec. 1-10, Aug. 11 to Sept. 30.

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

available in regional office at Salt Lake City, Utah. Records of discharge for wate

given in Water-Supply Paper 1216.

Chemical analyses, November 1950 to September 1951

Date of collection

Nov. 25-30, 1950 

r\of i in

Tkop 11 9fl - ...

Jan. 1-10, 1951 

Jan. 11-20 

Feb. 1-10 

Feb. 11-20 

Feb. 21-28 

Mar. 1-10 

Mar. 11-20 

M*i* 91 $1

Apr. 1-10 

Apr. 11-20 

Apr. 21-30 

Runoff 

(acrefeet)

752,700 

1,191,000 

1,179,000 

1,922,000

1,665,000 

1,509,000 

1,539,000 

1,248,000 

2,037,000 

1,538,000

1,544,000 

1,545,000 

1,460,000 

1,421,000 

2,368,000 

2,825,000

Silica 

(SiOa) 

ppm

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

Equivalents per million

Calcium 

(Ca)

1.00 

1.10 

1.05 

1.10

1.05 

1.05 

1.00 

.05 

.05 

.00

.00 

.05 

1.05 

1.05 

1.10 

1.10

Magnesium 

(Mg)

0.40 

.40 

.39 

.42

.45 

.43 

.43 

.43 

.42 

.43

.44 

.44 

.40 

.38 

.39 

.40

Sodium 

(Na)

0.07 

.07 

.08

.09 

.10 

.10 

.10 

.10 

.0.

.10 

.08 

.12 

.13 

.12 

.14

Potassium 

(K)

0.04 

.05 

.06

.06 

.10 

.09 

.10 

.10 

4

.15 

.14 

.03 

.02 

.05 

.05

Bicarbonate 

(HCO,)

1.23 

1.25 

1.28 

1.28

1.26 

1.31 

1.26 

1.28 

1.28 

1.25

1.25 

1.26 

1.23 

1.26 

1.28 

1.30

Sulfate 

(S04)

0.27 

.27 

.27 

.27

.29 

.27 

.29 

.29 

.29 

.29

.33 

.33 

.31 

.31 

.33 

.31

Chloride 

(Cl)

0.02

.03 

.03 

.03 

.03 

.03 

.02

.02 

.03 

.03 

.03 

.03 

.04

Fluoride 

(F)

0.01 

.01 

.02

.00 

.00 

.00 

.00 

.00 

.00

.00 

.00 

.01 

.01 

.01 

.01

Nitrate 

(NO,)

0.00 

.01 

.01 

.01

.01 

.02 

.01 

.01 

.00 

.01

.02 

.02 

.02 

.01 

.01 

.01
Mav 1 1 ft

May 11-20 

Matr 91 11

June 11-20 

July 1-10 ...

July 11-17 

Aug. 11-20 

Sept. 1-10 -------

Sept. 21-30 - -

Total or 

weighted average 

3,649,000 

6,141,000 

7,534,000 

6, 246, 000 

5,761,000 

6, 226, 000

5, 825, 000 

3,986,000 

1, 510, 000 

2,201,000 

1,990,000

1,597,000 

1,335,000 

1,182,000

(c)

12 

11 

9.5 

9.4 

8.2 

8.2

8.3 

8.2 

6.1 

6.2 

6.4

5.8 

6.8 

5.5

8.6

1.15 

1.10 

1.00 

1.05 

1.05 

1.05

1.00 

1.00 

bl. 

1.00 

1.00

1.00 

1.00 

1.00

1.05

.41 

.39 

.34 

.36 

.38 

.36

.44 

.40 

36 

.39 

.40

.40 

.39 

.39

0.40

.13 

.13 

.09 

.09 

.10 

.09

.08 

.08

.06 

.06

.06 

.06 

.06

0.10

.06 

.05 

.04 

.04 

.05 

.04

.10

.08 

.07

.07 

.07 

.07

0.06

1.33 

1.28 

1-.20 

1.20 

1.26 

1.26

1.25 

1.28 

1.25 

1.25 

1.28

1.28 

1.25 

1.23

1.26

.31 

.29 

.23 

.23 

.23 

.25

.23 

.25 

.23 

.23 

.23

.25 

.25 

.25

0.27

.03 

.03 

.02 

.02 

.02 

.02

.03 

.03 

.02 

.02 

.02

.02 

.02 

.02

0.03

.01 

.01 

.01 

.01 

.01 

.01

.01 

.01

.00 

.00

.00 

.00 

.01

0.01

.

.

.

.

.

.

.

.

.

.

.

.

.

0.

a Not included for computation of weighted averages, 

b Hardness determination by Schwarzenbach method.

c For computation of the weighted averages the total discharge corresponding to 79,440,000 acre-feet was used. 

This represents 82 percent of the runoff for the water year October 1950 to September 1951.
Part 13. SNAKE RIVER BASIN

SNAKE RIVER MAIN STEM 

SNAKE RIVER AT KING HILL, IDAHO

LOCATION. At county highway bridge about 400 yards downstream from gaging station, wai

at King Hill, Elmore County, and 20 miles downstream from Big Wood River. 

RECORDS AVAILABLE.--Chemical analyses: March to September 1951.

Water temperatures: March to September 1951. 

EXTREMES, March to September 1951. Specific conductance: Maximum, 564 micromhos Aug. 

Percent sodium: Maximum, 29 July 21-31; minimum, 17 Apr. 1-10.

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

samples available in regional office at Salt Lake City, Utah, Records of discharge 

September 1951 given in Water-Supply Paper 1217.

Chemical analyses, March to September 1951

Date of collection

Mart 27-31, 1951 « 

Apr. 1-10 

Apr. 21-30 

May 21-31 -------- 

June 1-10 

June 11-20 

July 1-10 

July 11-20 

July 21-31 

Aug. 1-10 

Aug. 11-20 

Aug. 21-31 

Runoff 

(acrefeet)

183, 500 

355,000 

298,900 

199, 200

332,800 

368,500 

406, 400 

293,800 

172,400 

214,400

162,800 

159,500 

179,300 

178, 600 

182, 500 

193,700

Silica 

(SiO,) 

ppm

 30 

29 

30 

34

29 

23 

25 

27 

32 

31

33 

36 

37 

37 

38 

37

Equivalents per million

Calcium 

(Ca)

2.50 

2.59 

2.30 

£.21

2.25 

2.30 

2.30 

2.35 

2.25 

2.30

2.25 

2.20 

2.15 

2.30 

2.30 

2.35

Magnesium 

(Mg)

1.40 

1.40 

1.40 

1.56

1.48 

1.32 

1.32 

1.40 

1.56 

1.56

.64 

.64 

.64 

.73 

.73 

.73

Sodium 

(Na)

1.13 

.87 

1.09 

1.26

1.13 

1.17 

1.09 

1.17 

1.39 

1.43

1.35 

1.52 

1.57 

1.52 

1.52 

1.52

Potassium 

(K)

0.25 

.24 

.17 

.16

.16 

.15 

.15 

.18 

.22 

.16

.14 

.13 

.13 

.14 

.12 

.12

Bicarbonate 

(HCO,)

3.36 

3.31 

3.20 

3.21

3.18 

3.29 

3.28 

3.34 

3.44 

3.47

3.44 

3.49 

3.54 

3.56 

3.56 

3.56

Sulfate 

(S04)

0.96 

.96 

.92 

1.02

.98 

.94 

.94 

.98 

1.12 

1.12

1.08 

1.17 

1.19 

1.21 

1.19 

1.23

Chloride 

(CD

0.65 

.65 

.62 

.68

.62 

.62 

.56 

.62 

.71 

.73

.68 

.73 

.76 

.79 

.73 

.73

Fluoride 

(F)

0.03 

.03 

.04 

.03

.04 

.04 

.04 

.04 

.04 

.04'

.03 

.03 

.03 

.03 

.03 

.03

Nitrate 

(NO,)

0.07 

.07 

.04 

.05

.04 

.04 

.03 

.05 

.05 

.05

.05 

.05 

.06 

.07 

.06 

.06
Sept. 1-10 

Sept. 11-20 

qant 91 *4A

Total 

178,300 

187,900 

198,300

a4.446.000

36 

35 

35

2.35 

2.40 

2.40

1.73 

1.81 

1.73

1.57 

1.57 

1.57

.13

.14 

.14

3.64 

.3.70 

3.70

1.25 

1.27 

1.29

.76 

.79 

.73

.03 

.03 

.03

.07 

.05 

.05

a Represents 47 percent of runoff for water year October 1950 to September 1951.

BOISE RIVER BASIN 

BOISE RIVER AT NOTUS, IDAHO

LOCATION. At steel county highway bridge, 360 yards downstream from gaging station, whic

. Canyon County, and 7 miles northwest of Caldwell.

RECORDS AVAILABLE. Chemical analyses: January 1930 to January 1940, November 1950 to Se

Water temperatures: November* 1950 to September 1951.

Sediment records: January 1939 to June 1940. 

EXTREMES, 1950-51. Specific conductance: Maximum, 765 micromhos Feb. 1; minimum, 93.8 m

Percent sodium: Maximum, 53 Aug. 11-20; minimum, 25 Apr. 11-20. 

EXTREMES, 1939-40, 1950-51. Specific conductance: Maximum, 1,390 micromhos Aug. 21-31, 

Percent sodium: Maximum, 64 Sept. 1-10, 1939; minimum, 25 Apr. 11-20, 1951. 

REMARKS. Values reported fo*r dissolved solids are residue on evaporation. Records of sp

in regional office at Salt Lake Ctiy, Utah. Records of discharge for water year Octob

Paper 1217.

Chemical analyses, November 1950 to September 1951

Date of collection

Nov. 21-30, 1950 

Dec. 1-10 

Dec. 11-20 

Dec 21 31

Jan. 1-10, 1951 

Jan. 11-20 

Jan 21-31 

Runoff

(acrefeet)

12, 990 

16, 440

1 1 .<Mft

1 f\ 99.n

13, 100

14 19ft

15 ftfift

Silica

(SiOa)

ppm

39

O1

39

39

3R

3fi

Equivalents per million

Calcium

(Ca)

2.45

2

QC

2 

OR

2 30

2 4R

2 

Oft

9 4n

Magnesium

(Mg)

1.15

QQ

99

QQ

1.07

1.07

1 r»7

Sodium

(Na)

3.*

2 

Q7

2 ?n

2

07

2 96

2

70

9 ft7

Potassium

(K)

17

0 1 £

.15

1°.

.14

1Q

1O

Bicarbonate

(HC03)

4.33

3 

DO

3

07

4 

no

3 

Oft

* Q,9

Sulfate

(SO,)

2.02 

1.71

1 fiQ

1

QC

1

QO

1 7°.

1 79

Chloride

(Cl) ,

0.65

C£

Ifi

£O

£O

RQ

Fluoride

(F)

0.03

ni

no

ft9

ni

ns

Nitrate

(N03

0.07

AD

.07

.05

n

n
BOISE RIVER BASIN Continued 

BOISE RIVER AT NOTUS, IDAHO Continued

Chemical analyses, November 1950 to September 1951 --Conti

Date of collection

Feb. 1-5, 1951- 

Feb. 6-10 

TToH 11 1Q

Feb. 20-28 

Mar. 1-10 

Mar. 21-31, Apr. 1-2-

Apr. 11-20 

Apr. 21-30 

MQV 1 -.1ft .

May 11-20 

May 21-31 - --,

June 1-10 

June 11-20 

July 11-20 

July 21-31 

Aug. 1-10 

Aug. li-20 

Sept. 1-10 

Sept. 11-20 

Sept. 21-30 r 

Total or 

weighted average --

Runoff 

(acrefeet)

8,250 

18, 450 

25,210 

22,950

27,490 

51, 990 

97, 330 

81, 520 

95,540 

114, 900

98, 200 

117,000 

125,100 

83, 090 

52, 560 

23,410

15, 780 

3,590 

4,060 

4,800 

2,500 

5,800

5,000 

5,750 

6,510

al, 198,000

Silica 

(MO,) 

ppm

37 

28 

28 

27

26 

23 

21 

18 

16 

19

18 

18 

15 

17 

18 

18

22 

31 

32 

32 

34 

36

39 

39 

37

21

Equivalents per million

Calcium 

(Ca)

3.04 

1.45 

1.55 

1.40

1.30 

1.00 

.85 

.75 

.60 

.65

.70 

.65 

.60 

.70 

.75 

.95

1.20 

1.90 

1.90 

1.95 

2.20 

2.15

2.30 

2.25 

2.15

0.95

Magnesium 

(Mg)

1.07 

.65 

.72 

.61

.54 

.44 

.32 

.25 

.29 

.24

.23 

.23 

.19 

.26 

.29 

.37

.49 

.90 

.90 

.90 

1.07 

.99

1.15 

1.15 

1.07

0.39

Sodium 

(Na)

2.83 

1.43 

1.65 

1.65

1.52 

.96 

.70 

.48 

.33 

.43

.43 

.48 

.42 

.61 

.70 

.96

1.39 

3.00 

2.87 

2.87 

3.78 

3.30

3.52 

3.44 

3.17

0.91

Potassium 

(K)

0.26 

.18 

.13 

.09

.09 

.07 

.17 

.17 

.09 

.06

.07 

.07 

.08 

.09 

.09 

.10

.14 

.09 

.09 

.08 

.10 

.09

.18 

.19 

.16

0.10

Jicarxmate 

HCO3)

4.74 

2.31 

2.54 

2.44

2.21 

1.61 

1.34 

1.08 

.95 

.98

1.05 

1.02 

.93 

1.20 

1.29 

1.62

2.13 

3.51 

3.57 

3.65 

4.24 

4.03

4.26 

4.20 

4.06

1.59

Sulfate 

(S04)

1.75 

.94 

1.04 

1.02

.92 

.60 

.46 

.31 

.23 

.20

.21 

.23 

.20 

.31 

.33 

.48

.69 

1.64 

1.50 

1.52 

2.06 

1.83

2.00 

1.94 

1.79

0.54

Chloride 

(Cl)

0.59 

.31 

.34 

.34

.28 

.20 

.15 

.10 

.06 

.06

.07 

.08 

.06 

.11 

.12 

.17

.24 

.62 

.51 

.54 

.79 

'.68

.71 

.65 

.56

0.17

Fluoride

(F)

0.02 

.02 

.02 

.03

.03 

.03 

.02 

.02 

.01 

.03

.03 

.03 

.02 

.02 

.03 

.03

.03 

.03 

.03 

.03 

.02 

.02

.03 

.03 

.03

0.02

Nitrate 

(N03)

0.07 

.08 

.09 

.08

.08 

.06 

..08 

.07 

.03 

.04

.04 

.05 

.03 

.03 

.03 

.04

.07 

.07 

.05 

.05 

.05 

.07

.05 

.06 

.08

0.05

a Represents 93 percent of runoff for water year October 1950 to September 1951.
Part 14. PACIFIC SLOPE BASINS IN OREGON AND LOWER COLUM

COLUMBIA RIVER MAIN STEM 

COLUMBIA RIVER AT MARYHILL FERRY NEAR RUFUS, OR

LOCATION. At'Maryhill Ferry about 2i miles downstream from Rufus, Sherman County, and ab

The Dalles, which is just upstream from Celilo Falls, 3 miles downstream from Deschutes 

Wasco County.

DRAINAGE AREA. 237,000 square miles (above gaging station).

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

Water temperatures: December 1950 to September 1951.

EXTREMES, 1950-51. Specific conductance: Maximum, 225 micromhos Sept. 21, 23; minimum, 

Percent sodium: Maximum, 20 Feb. 1, 4-5, 7, 9-10; minimum, 12 June 21-30.

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

in regional office at Salt Lake City, Utah. Discharge records for gaging station near 

September 1951 given in Water-Supply Paper 1218. These records include the inflow of 

amounts to less than 5 percent of the annual runoff at the gaging station. No other a

gaging station except during periods of heavy local rains.

Chemical analyses, December 1950 to September 1951

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-

KJIn-M 91 41

Apr. 1-10 

Apr. 11-20 

Runoff 

(acrefeet)

2,658,000 

2, 594, 000 

3, 499, 000 

3,427,000 

2,820,000 

3,265,000

1,720,000 

3,953,000 

3,870,000

4, 044, 000 

5, 292, 000 

5, 724f 000

Silica 

(Si02) 

ppm

16 

16 

15 

15 

16 

17

17 

19 

20

20 

20 

15

Equivalents per million

Calcium 

(Ca)

1.10 

1.05 

1.10 

1.10 

1.10 

l.W

1.10 

1.00 

1.05

.95 

.85 

.85

Magnesium 

(Mg)

0.53 

.53 

.50 

.52 

.57 

.58

.59 

.57 

.63

.54 

.47 

.39

Sodium 

(Na)

0.39 

.39 

.33 

.31 

.37 

.39

.43 

.30 

.27

.27 

.27 

.23

Potassium 

(K)

0.07 

.07 

.06 

.10 

.12 

.11

.06 

.10 

.10

.09 

.09 

.05

Bicarbonate 

(HCO,)

1.47 

1.51 

1.46 

1.43 

1.56 

1.57

1.62 

1.43 

1.44

1.34 

1.23 

l'.21

Sulfate 

(S0«)

0.37 

.37 

.35 

.33 

.40 

.37

.40 

.37 

.42

.35 

.29 

.25

Chloride 

(Cl)

0.20 

.14 

.12 

.10 

.13 

.14

.15 

.11 

.13

.11 

.08 

.05

Fluoride 

(F)

0.02 

.02 

.02 

.01 

.01 

.02

.02 

.01

V01

.01 

.01 

.02

Nitrate 

(NO,)

0.02 

.02 

.01 

.01 

.02 

.02

.02 

.02 

.03

.01 

.02 

.02

a Sum of determined constituents.
COLUMBIA RIVER MAIN STEM Continued

COLUMBIA RIVER AT MARYHILL FERRY NEAR RUFUS, OREG. 

Chemical analyses, December 1950 to September 1951 Cont

Date of collection

May 1-10,1951 

May 11 20

May 21-31

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 

Total or 

weighted average 

Runoff 

(acrefeet)

6, 127, 000 

10, 060, 000 

12, 610, 000

9,715,000 

8, 741, 000 

8, 820, 000 

7, 674, 000 

6, 948, 000 

6, 579, 000

4, 685, 000 

3,461,000 

2,884,000 

2,481,000 

2,124,000 

1, 920, 000

1)137,700,000

Silica 

(SiO,) 

ppm

17 

14 

11

11 

10 

8.7 

8.1 

8.2 

11

11 

11 

11 

11 

12 

14

13

Equivalents per million

 Calcium 

(Ca)

0.85 

.80 

.75

.85 

.85 

.90 

1.00 

1.05 

1.10

1.10 

1.10 

1.15 

1.15 

1.20 

1.20

0.95

Magnesium 

(Mg)

0.40 

.36 

.36

.38 

.37 

.37 

.43 

.48 

.49

.46 

.50 

.55 

.55 

.59 

.60

0.45

Sodium 

(Na)

0.24 

.20 

.23

.20 

.19 

.19 

.23 

.27 

.25

.24 

.29 

.36 

.37 

.43 

.42

0.26

Potassium 

(K)

0.06 

.09 

.10

.08 

.07 

.07 

.04 

.07 

.12

.09 

.09 

.12 

.13 

.12 

.13

0.08

Bicarbonate 

(HCO,)

1.18 

1.08 

1.07

1.15 

1.15 

1.20 

1.34 

1.44 

1.51

1.44 

1.47 

1.61 

1.64 

1.70 

1.74

1.31

Sulfate 

(SO,)

0.25 

.23 

.23

.23 

.21 

.23 

.25 

.31 

.33

.29 

.33 

.40 

.42 

.46 

.46

0.29

Chloride 

(Cl)

o:oe

.06 

.10

.08' 

.06 

.06 

.06 

.12 

.08

.14 

.10 

.11 

.12 

.14 

.15

0.09

Fluoride 

(F)

0.02 

.02 

.02

!oi

.01 

.01 

.01 

.02

.01 

.01 

.01 

.02 

.02 

.02

0.02

Nitrate 

(NO,)

0.02 

.02 

.01

.01 

.01 

.01 

.01 

.01 

.01

.01 

.02 

.01 

.01 

.01 

.01

0.02

b Represents 84 percent of runoff for water year October 1950 to September 1951.
WILLAMETTE RIVER BASIN

WILLAMETTfi RIVER AT SALEM, OREG.

LOCATION. At bridge on Oregon Highway 22, Polk-Marion County line, 300 feet downstream 

DRAINAGE AREA. 7,260 square miles.

RECORDS AVAILABLE. Chemical analyses: August to December 1910, August 1911 to August 

Water temperatures: February to September 1951. 

EXTREMES, February to September 1951. Specific conductance: Maximum, 77.4 micromhos A

Percent sodium: Maximum. 28 May 21-31; minimum, 20 Apr. 11-20.

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

samples available in regional office at Salt Lake City, Utah. Records of discharge 

September 1951 given in Water-Supply Paper 1218.

Chemical analyses, February to September 1951

Date of collection

Feb. 1-10, 1951 

Feb. 21-28 

Mar. 1-10 

Apr. 1-10 

Apr. 11-20 

Apr. 21-30 

May 1-10 

May 11-20 

May 21-31 

Runoff 

(acrefeet)

1,438,000 

1,262,000 

466, 300 

613, 100 

1,011,000 

766, 600

575, 600 

554,400 

378, 200 

455,800 

509,200 

383,200

Silica 

(SiOa) 

ppm

15 

16 

18 

17 

16 

17

16 

16 

16 

17 

17 

18

Equivalents per million

Calcium 

(Ca)

0.23 

.23 

.25 

.24 

.20 

.21

.23 

.26 

.22 

.22 

.22 

.22

Magnesium 

(Mg)

0.16 

.16 

.17 

.17 

.15 

.15

.17 

.17 

.13 

.16 

.14 

.16

Sodium

(Na)

0.15 

.14 

.14 

.13 

.13 

.13

.13 

.13 

.12 

.14 

.15 

.17

Potassium 

(K)

0.06 

.06 

.06 

.05 

.05 

.06

.08 

.09 

.09 

.06 

.07 

.05

Bicarbonate 

(HCO,)

0.44 

.44 

.49 

.46 

.43 

.44

.46 

.48 

.44 

.43 

.43 

.48

Sulfate 

(S0«)

0.06 

.05 

.04 

.05 

.05 

.04

.04 

.04 

.04 

.05 

.04 

.05

Chloride 

(Cl)

0.09 

.06 

.06 

.08 

.06 

.06

.06 

.05 

.05 

.06 

.06 

.06

Fluoride

(F)

0.00 

-.00 

.01 

.01 

.01 

.01

.03 

.02 

.01 

.03 

.03 

.03

Nitrate 

(N03)

0.01 

.01 

.01 

.01 

.01 

.01

.01 

.00 

.00 

.01 

.01 

.01
WILLAMETTE RIVER BASIN Continued 

WILLAMETTE RIVER AT SALEM, OREG. Continued

Chemical analyses, February to September 1951 Continued

Date of collection

June. 1-10, 1951 

June 11-20 - 

July 1-10 

July 11-20 

Aug. 1-10 

Aug. 11-17 

Aug. 24-31 

Sept. 1-3, 5, 11-15 - 

Sept. 16-20, 24-29 -

Total 

Runoff 

(acrefeet) .

223, 500 

186,000 

146, 100 

126,000 

107,800 

102,000

84,580 

60,890 

72,600 

81,520 

92, 430

a9,719,000

Silica 

(SiOa) 

ppm

19 

20 

20 

20 

22 

20

19 

18 

18 

18 

18

Equivalents per million

Calcium 

(Ca)

0.25 

.27 

.28 

.29 

.33 

.31

.30 

.31 

.30 

.30 

.33

Magnesium 

(Mg)

0.16 

.16 

.17 

.16 

.17 

.18

.20 

.20 

.20 

.22 

.22

Sodium 

(Na)

0.17 

.14 

.13 

.13 

.17 

.17

.20 

.22 

.21 

.19 

.20

Potassium 

(K)

0.07 

.05 

.05 

.05 

.05 

.04

.05 

.07 

.08 

.10 

.08

Bicarbonate 

(HC03)

0.49 

.51 

.52 

.56 

.59 

.61

.62 

.59 

.61 

.61 

.66

Sulfate 

(S04)

0.05 

.06 

.05 

.04 

.05 

.05

.05 

.06 

.05 

.07 

.07

Chloride 

(Cl)

0.06 

.07 

.07 

.06 

.08 

.08

.09 

.09 

.10 

.10 

.12

Fluoride

(F)

0.03 

.01 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.02 

.01

Nitrate 

(NOS)

0.01 

.01 

.01 

.01 

.01 

.01

.01 

.01 

.01 

.01 

.01

a Represents 41 percent of runoff for water year October 1950 to September 1951.
INDEX

Page 

Alamogordo Dam, N. Mex., Pecos

River below*................... 96-97

American River at Fair Oaks, Calif. .... 140-141

American River basin.................. 140-141

Arkansas River at Ralston, (Ma. ....... 48-50

at Van Buren, Ark. ................ 51-53

below John Martin Reservoir, Colo. . 46-47 

Arkansas River basin .................. 46-62

Artesia, N. Mex., Pecos River near .... 98-99

Austin, Tex., Colorado River at ....... 76

B

Bartlett Dam, Ariz., Verde River below. 129-130

Bighorn, Mont., Bighorn River at ...... 27-28

Bighorn River at Bighorn, Mont. ........ 27-28

at Thermopolis, Wyo............... 25-26

Billings, Mont., Yellowstone River at .. 22-23

Blanco, N. Mex., San Juan River near .. 118-119

Boise River at Notus, Idaho ............ 145-146

Boise River basin ..................... 145-146

Boron hazard ......................... 13

Brady, Nebr., Platte River at ......... 36-37

Brazos River at Richmond, Tex. ....... 72-73

Brazos River basin .................... 72-73

Calaveras River basin ................. 136

 Cambridge, Nebr., Republican River at.. 42-43 

Cameron, Ariz., Little Colorado

River at...................... 120

Canadian River near Taseosa, Tex. .... 57-59

near Whitefield, Okla. ............. 59-62

Cheyenne River near Eagle Butte, S. Dak. 33-34

Cheyenne River basin .................. 33-34

Christiansen, J. E. ................... 12,14

Cimarron River at Mannford, Okla. ..... 54-56

Cisco, Utah, Colorado River near ...... 104-105

Colorado River at Austin, Tex. ......... 76

at Lees Ferry, Ariz. .............. 106-107

atRobertiee, Tex. ............... 74-75

at Wharton, Tex. .................. 77

below Hoover Dam, Ariz. -Nev. ..... 110-111

main stem ....................... 102-111

near Cisco, Utah ................. 104-105

near Glenwood Springs, Colo. ...... 102-103

near Grand Canyon, Ariz. ......... 108-109

Colorado River basin (Part 8) .......... 74-77

Colorado River basin (Part 9) .......... 102-131

Columbia River at Grand Coulee Dam,

Wash. ....................... 142-143

at Maryhill Ferry near Rufus, Or eg.. 147-148

Columbia River main stem (Part 12) .... 142-143

Columbia River main stem (Part 14) .... 147-148

Comstock, Tex., Pecos River near .... 101

Denison, Tex., Red River at Denison

Dam near .................... 63

Diversions and return flows at and below

Imperial Dam ................ 112-113

Eagle Butte, S. Dak., Cheyenne River

River near.................... 33-34

Eagle Pass, Tex., Rio Grande at ...... 94

Eaton, F. M. ........................ 9,12,14

Elephant Butte Dam, N. Mex.,

Rio Grande below ............. 89

El Paso, Tex., Rio Grande near ........ 90

Page 

Evadale, Tex., Neches River at ........ 68-69

F

Fair Oaks, Calif., American River at.. 140-141

Feather River at Nicolaus, Calif. ..... 139-140

Feather River basin ................. 139-140

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

below Gillespie Dam, Ariz. .......

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

Gillespie Dam, Ariz., Gila River below. 

Glenwood Springs, Colo.,

Colorado River near ..........

Grand Canyon, Ariz., Colorado River

near .........................

Grand Coulee Dam, Wash.,

Columbia River at .............

Grand Junction, Colo., Gunnison River

near ........................

Grand River near Wakpala, S. Dak. ...

Grand River basin ...................

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

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

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

Guadalupe River at Victoria, Tex.......

Guadalupe River basin ................

Guernsey Reservoir, Wyo., North Platte

River below ..................

Gunnison River near Grand Junction,

Colo. ........................

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

H

123-124 

125-126 

123-131 

125.-126

102-103 

108-109 

.142-143

114-115

31-32

31-32

116-117

116-117

116-117

78-79

78-79

35.

114-115 

114-115

Headley, F. B. .................... 9,14

Hoover Dam, Ariz. -Nev., Colorado

River below ................... 110-111

Hudson Bay and upper Mississippi

River basins ................. 15

Huffman, Tex., San Jacinto River near . 70-71

Irrigation-quality network stations ..... 

J

John Martin Reservoir, Colo., Arkansas 

River below ...................

Julesburg, Colo., South Platte River at.

3,4

46-47 

39-41

Kansas River basin .................. 42-45

Kelvin, Ariz., Gila River at .......'... 123-124

King Hill, Idaho, Snake River at ...... 144-145

Knights Landing, Calif., Sacramento

River at ...................... 138->139

Lake Pleasant, Ariz., Outflow from ... 131

Langtry, Tex., Rio Grande at ........ 93

Lees Ferry, Ariz., Colorado River at.. 106-107

Little Colorado River at Cameron, Ariz. 120

Little Colorado River basin .......... 120

Littlefield, Ariz., Virgin River at ..... 121-122

Lobatos, Colo., Rio Grande above

Culebra Creek near ........... 81-82|

Locate, Mont., Powder River near .... 30-31

151
152 INDEX

Page 

Lower Mississippi River basin ......... 46-65

Lynndyl, Utah, Sevier River near ...... 132-133

Magistad, O. C.'......................

Mannford, Okla., Cimarron River at ... 

Mathis, Tex., Nueces River near ......

Maxwell, Nebr., Supply Canal (TriCounty Diversion) near ........

Miles City, Mont., Tongue River at ....

Missouri River at Nebraska City, Nebr. .

at Plerre, S. Dak. ................

main stem .......................

near WUliston, N. Dak. ...........

Missouri River basin ..................

Mokelumne River at Woodbridge, Calif... 

Mokelumne River basin ................

N

12,14

54-56

80

38

28-29

20-21

18-20

16-21

16-17

16-45

137

137

Nebraska City, Nebr., Missouri River at 1-21

Neches River at Evadale, Tex. .........

Neches River basin ................... 68-69

Nlcolaus, Calif., Feather River at ..... 139-140

North Platte River below Guerneey

Reservoir, Wyo. .............. 35

Notus, Idaho, Boise River at ........... 145-146

Nuecas River near Mathis, Tex. ....... 80

Nueces River basin ................... 80

Old Fort Quitman, Tex., Rio Grande below 91

Orla, Tex., Pecos River near .......... 100

Outflow from Lake Pleasant, Ariz. ..... 131

Pacific slope basins in California ....... 134-141

Pacific slope basins in Oregon and Lower

Columbia River basin ......... 147-150

Pacific slope basins in Washington and

Upper Columbia River basin .... 142-143

Pecos River below Alamogordo Dam,

N. Mex. ..................... 96-97

near Artesia, N. Mex. ............ 98-99

near Comstock, Tex. ............. 101

near Orla, Tex. ................... 100

Percent sodium .......................

Pierre, S. Dak., Missouri River at .... 18-20

Platte River at Brady, Nebr. ........... 36-37

Platte River basin .................... 35-41

Powder River near Locate, Mont. ...... 30-31

Ralston, Okla., Arkansas River at ... 

Red River at Denison Dam near

Denlson, Tex. ..............

Red River basin ....................

Red River of the North basin ........

Republican River at Cambridge, Nebr. 

Residual sodium carbonate ...........

Richmond, Tex., Brazos River at ....

Rio Grande at Eagle Pass, Tex. ......

at Langtry, Tex. ................

at Roma, Tex.

48-50

63 

63-65

15 

42-43

72-73 

94 

93 

95 

at San Marclal, N. Mex. ........... 87-88

(Tiffany Channel ) at Tiffany, N. Mex. 85-86 

at Upper Presidio, Tex............. 92

below Elephant Butte Dam, N. Mex. . 89 

below Old Fort Quitman, Tex. ..... 91

near El Paso, Tex. ............... 90

above Culebra Creek near Lobatos,

Colo. ........................ 81-82

at Otowi Bridge near San Ildefonso,

N. Mex....................... 83-84

Rio Grande basin ...................... 81-101

Robert Lee, Tex., Colorado River at ... 74-75 

Roma, Tex., Rio Grande at ............ 95

Rufus, Oreg., Columbia River at

Maryhill Ferry near .......... 147-148

Rullff, Tex., Sabine River near

S

Sabine River near Ruliff, Tex. ..........

Sabine River basin. ....................

Sacramento River at Knights Landing,

Calif. ........................

main stem ......................

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

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

Saline River at Tescott, Kans. ..........

Salinity hazard .......................

Salt River at Stewart Mountain Dam, Ariz. 

San Ildefonso, N. Mex., Rio Grande at

Otowi Bridge near ............

San Jacinto River near Huffman, Tex.....

San Jacinto River basin ................

San Joaquin River main stem ...........

near Vernalis, Calif. ............

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

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

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

San Marcial, N. Mex. Rio Grande at ....

Schedules for analyses of samples ......

Scofield, C. S. ...................... 9,

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

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

Sheyenne River near Warwick, N. Dak. .. 

Sidney, Mont., Yellowstone River near .. 

Snake River at King Hill, Idaho .........

main atem .....................

Snake River basin ......................

Sodium-adsorption ratio (SAR) ..........

South Platte River at Julesburg, Colo. ...

Stewart Mountain Dam, Ariz., Salt

River at ......................

Stockton, Calif., Stockton Diverting

Canal at ......................

Stockton diverting canal at Stockton, Calif. 

Supply canal (Tri-county diversion)

near Maxwell, Nebr. ...........

Tabler, Okla., Washita River near ... 

Tascosa, Tex., Canadian River near 

Tescott, Kans., Saline River at ......

The Great Basin ....................

Thermopolis, Wyo., Bighorn River at 

Thorne, J. P. and Thorne, D. W. ....

Tiffany, N. Mex. Rio Grande

(Tiff any Channel) at ........

Tongue River at Miles City, Mont. ...

U

United States Salinity Laboratory Staff 

Units for reporting data .............

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

Upper Presidio, Tex., Rio Grande at .

Van Buren, Ark., Arkansas River at ....

Verde River below Bartlett Dam, Ariz. .. 

Vernalis, Calif., San Joaquin River near . 

Victoria, Tex., Guadalupe River at .....

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

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

W

Wakpala, S. Dak., Grand River near ....

Warwick, N. Dak., Sheyenne River near . Washita River near Tabler, Okla. .......

Western Gulf of Mexico basins ..........

Wharton, Tex., Colorado River at ......

Whitefield, Okla., Canadian River near .. 

Wilcox, L. V. ........................

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

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

WUliston, N. Dak., Misaouri River near .

66-67

66-67 

66-67

138-139

138-139

138-139

149-150

44-45

13

127-128

83-84

70-71

70-71

134-135

134-135

134-135

118-119

118-119

87-88

6-7

12,13,14

132-133

132-133

15

24

144-145 

144-145 

144-146

39-41 

127-128

136

136

38

64-65

57-59

44-45

132-133

25-26

12

85-86

12,13 

7,8

142-143 

92

Si-53 

129-130 

134-135

78-79 

121-122 

121-122

31-32 

15

64-65

66-101

77

59-62

12,14

149-150

149-150

16-17
INDEX 153

Woodbridge, Calif., Mokelumne 

River at..............

Page 

137

Page 

Yellowstone River near Sidney, Mont. ...... 24

Yellowstone River basin .................. 22-31

Yuma, Ariz., Yuma Main Canal below

Colorado River siphon at ........ 112-113

Yuma Main Canal below Colorado River

Yellowstone River at Billings, Mont. .... 22-23 eiphon at Yuma, Ariz. .......... 112-113

* U. S. GOVERNMENT PRINTING OFFICE : 1954 O - 318476