DEPARTMENT OF THE INTERIOR

ALBERT B. FALL, Secretary

UNITED STATES GEOLOGICAL SURVEY

GEORGE OTIS SMITH, Director

Water-Supply Paper 508

SURFACE WATER SUPPLY OF THE 

UNITED. STATES

1919-1920

PART VIII. WESTERN GULF OF MEXICO BASINS

NATHAN C. GROVER, Chief Hydraulic Engineer

C. E. ELLSWORTH, District Engineer

Prepared in cooperation with the 

STATE OF TEXAS

WASHINGTON

SOYEKNMENT PRINTING OFFICE

1922
ADDITIONAL COPIES

OF THIS PUBLICATION MAY BE PROCURED FROM

THE SUPERINTENDENT OF DOCUMENTS

GOVERNMENT PRINTING OFFICE

WASHINGTON, D. C.

AT

15 CENTS PER COPY

V
CONTENTS.

Page.

Authorization and scope of work............................................ 1

Definition of terms......................................................... 2

Explanation of data........................................................ 3

Accuracy of field data and computed records................................. 4

Cooperation................................................................ 5

Division of work.......................................................... 6

Gaging-station records...................................................... 6

Trinity River basin.................................................... 6

West Fork of Trinity River at Bridgeport, Tex....................... 6

Brazos River basin...................................................... 9

Brazos River near Graham, Tex..................................... 9

Brazos River at Brazos, Tex........................................ 10

Brazos River at Waco, Tex.......................................... 12

Brazos River near College Station, Tex............................. 15

Clear Fork of Brazos River near Eliasville, Tex....................... 18

Little River at Cameron, Tex....................................... 20

Colorado River basin................................................... 23

Colorado River near Bronte, Tex................................... 23

Colorado River at Ballinger, Tex................................... 25

Colorado River near Chadwick, Tex................................. 28

Colorado River at Marble Falls, Tex................................. 31

Colorado River at Austin, Tex...................................... 33

Evaporation near Austin, Tex....................................... 37

Colorado River at Columbus, Tex................................... 38

Colorado River at Wharton, Tex.................................... 41

North Concho River at San Angelo, Tex............................. 44

Concho River near San Angelo, Tex................................ 47

Concho River near Paint Rock, Tex................................. 50

San Saba River at Menard, Tex.................................... 53

San Saba River near San Saba, Tex.................................. 55

North Llano River near Junction, Tex.............................. 58

Llano River near Junction, Tex..................................... 60

Barton Springs at Austin, Tex....................................... 63

Guadalupe River basin................................................ 64

Guadalupe River near Comfort, Tex................................. 64

Guadalupe River at New Braunfels, Tex............................. 67

Guadalupe River near Gonzales, Tex............................... 70

Guadalupe River below Cuero, Tex.................................. 73

San Marcos River at San Marcos, Tex................................ 76

San Marcos River at Ottine, Tex.................................... 79

San Antonio River basin............................................... 82

San Antonio River at San Antonio, Tex.............................. 82

San Antonio River at Calaveras, Tex............................... 85

San Pedro Creek at San Antonio, Tex................................ 87

in
IV CONTENTS.

Gaging-station records Continued. Page.

Nueces River basin...................................................... 89

Nueces River near Cinonia, Tex.................................... 89

Nueces River near Three Rivers, Tex................................ 92

Nueces River at Calallen, Tex....................................... 95

Frio River near Derby, Tex........................................ 96

Frio River at Fowlerton, Tex........................................ 99

Frio Lake outlet near Fowlerton, Tex.............................. 100

Rio Grande basin...................................................... 102

Rio Grande near San Marcial, N. Mex............................... 102

Rio Grande below Elephant Butte dam, N. Mex..................... 105

Rio Grande above Presiiio, Tex.................................... 107

Rio Grande below Presidio, Tex..................................... 108

Rio Grande at Langtry, Tex......................................... 110

Rio Grande near Devils River, Tex.................................. 112

Pecos River near Dayton, N. Mex................................... 113

Pecos River at Carlsbad, N. Mex................................... 117

Pecos River near Malaga, N. Mex................................... 119

Pecos River near Angeles, Tex...................................... 121

Pecos River above Barstow, Tex................................... 124

Pecos River near Grandfalls, Tex................................... 126

Pecos River near Comstock, Tex................................... 130

Miscellaneous measurements................................................ 134

Index.................................................................... 135

ILLUSTRATIONS.

PLATE I. A, Price current meters; B, Typical gaging station.................

II. Water-stage recorders: A, Stevens continuous; B, Gurley printing; 

C, Friez.......................................................
SURFACE WATER SUPPLY OF WESTERN GULF OF 

MEXICO BASINS, 1919-1920,

AUTHORIZATION AND SCOPE OF WORK.

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

measurements of flow made on streams in the United States during 

the biennium ending September 30, 1920.

The data presented in these reports were collected by the United 

States Geological Survey under the following authority contained 

in the organic law (20 Stat. L., p. 394):

Provided, That this officer [the Director] shall have the direction of the Geological 

Survey and the classification of public lands and examination of the geological structure, mineral resources, and products of the national domain.

The work was begun in 1886 in connection with special studies 

relating to irrigation in the arid west. Since the fiscal year ending 

June 30, 1895, successive sundry civil bills passed by Congress have 

carried the following item and appropriations:

For gaging the streams and determining the water supply of the United States, 

and for the investigation of underground currents and artesian wells, and for the 

preparation of reports upon the best methods of utilizing the water resources.

Annual appropriations for the fiscal years ended June .30, 1895-1921.

1895...................................................... $12, 500. 00

1896...................................................... 20,000. 00

1897 to 1900, inclusive.................................... 50,000. 00

1901 to 1902, inclusive..........................'.......... 100, 000. 00

1903 to 1906,inclusive.................................... 200, 000. 00

1907...................................................... 150,000. 00

1908 to 1910,inclusive.................................... 100, 000. 00

1911 to 1917, inclusive. ...................t ............... 150, 000. 00

1918...................................................... 175, 000. 00

1919.. ...........................-......................'... 148, 244. 10

1920...................................................... 175, 000. 00

1921...................................................... 180, 000. 00

In the execution of the work many private and State organizations have cooperated either by furnishing data or by assisting in 

collecting data. Acknowledgments for cooperation of the first kind 

are made in connection with the description of each station affected; 

cooperation of the second kind is acknowledged on page 5.

1
2 SURFACE WATER SUPPLY, 191&-1920, PART VIII.

Measurements of stream flow have been made at about 5,000 

points in the United States and also at many points in Alaska and 

the Hawaiian Islands. In July, 1920, 1,350 gaging stations were 

being maintained by the Survey and the cooperating organizations. 

Many miscellaneous discharge measurements were made at other 

points. In connection with this work data were also collected in 

regard to precipitation, evaporation, storage reservoirs, river profiles, and water power in many sections of the country and will be 

made available in water-supply papers from time to time.

DEFINITION OF TERMS.

The volume of water flowing in a stream the "run-off" or "discharge" is expressed in various terms, each of which has become 

associated with a certain class of work. These terms may be divided 

into two groups (1) those that represent a rate of flow, as secondfeet, gallons per minute, miner's inches, and discharge in second-feet 

per square mile, and (2) those that represent the actual quantity of 

water, as run-off in inches, acre-feet, and millions of cubic feet. The 

principal terms used in this series of reports are second-feet, secondfeet per square mile, run-off in inches, and acre-feet. They may be 

defined as follows:

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

A second-foot is the rate of discharge of water flowing in a channel 

of rectangular cross section 1 foot wide and 1 foot deep at an average 

velocity of 1 foot per second. It is generally used as a fundamental 

unit from which others are computed.

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

of water flowing per second from each square mile of area drained, 

on the assumption that the run-off is distributed uniformly both as 

regards time and area.

" Run-off in inches " is the depth to which an area would be covered 

if all the water flowing from it in a given period were uniformly distributed on the surface. It is used for comparing run-off with rainfall, which is usually expressed in depth in inches.

An "acre-foot," equivalent to 43,560 cubic feet, is the quantity 

required to cover an acre to the depth of 1 foot. The term is commonly used in connection with storage for irrigation.

The following terms not in common use are here defined:

"Stage-discharge relation," an abbreviation for the term "relation 

of gage height to discharge."

"Control," a term used to designate the section or sections of the 

stream below the gage which determines the stage-discharge relation 

at the gage. It should be noted that the control may not be the same O O "^

section or sections at all stages.
U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 508 PI ATE t

A. PRICK CURRENT METERS.

B. TYPICAL GAGING STATION.
U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER SOS PLATE II

I

.

. STEVENS CONTINUOUS. S. GURLEY PRINTING.

WATER-STAGE RECORDERS.

C. FRIEZ.
EXPLANATION OF DATA. 3

The "point of zero flow" for a gaging station is that point on the 

gage the gage height to which the surface of the water falls when 

the discharge of the stream is reduced to zero.

EXPLANATION OF DATA.

The data presented in this report cover the biennium beginning 

October 1, 1918, and ending September 30, 1920. At the beginning 

of January in most parts of the United States much of the precipitation in the preceding three months is stored as ground water in the 

form of snow or ice, or in ponds, lakes, and swamps, and this stored 

water passes off in the streams during the spring break-up. At the 

end of September, on the other hand, the only stored water available 

for run-off is possibly a small quantity in the ground; therefore the 

run-off for the year beginning October 1 is practically all derived 

from precipitation within that year.

The base data collected at gaging stations consist of records of 

stage, measurements of discharge, and general information used to 

supplement the gage heights and discharge measurements in determining the daily flow. The records of stage are obtained either from 

direct readings on a staff gage or from a water-stage recorder that 

gives a continuous record of the fluctuations. Measurements of 

discharge are made with a current meter. (See Pis. I, II.) The 

general methods are outlined in standard textbooks on the measurement of river discharge.

From the discharge measurements rating tables are prepared that 

give the discharge for any stage, and these rating tables, when 

applied to gage heights, give the discharge from which the daily, 

monthly, and yearly mean discharge is determined.

The data presented for each gaging station in the area covered by 

this report comprise a description of the station, a table giving results 

of discharge measurements, a table showing the daily discharge of 

the stream, and a table of monthly and yearly discharge and run-off.

If the base data are insufficient to determine the daily discharge, 

tables giving daily gage heights and results of discharge measurements are published.

The description of the station gives, in addition to statements 

regarding location and equipment, information in regard to any conditions that may affect the constancy of the stage-discharge relation, 

covering such subjects as the occurrence of ice, the use of the stream 

for log driving, shifting of control, and the cause and effect of backwater; it gives also information as to diversions that decrease the 

flow at the gage, artificial regulation, maximum and minimum 

recorded stages, and the accuracy of the records.

The table of daily discharge gives, in general, the discharge in 

second-feet corresponding to the mean of the gage heights read each
4 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

day. At stations on streams subject to sudden or rapid diurnal 

fluctuation the discharge obtained from the rating table and the 

mean daily gage height may not be the true mean discharge for the 

day. If such stations are equipped with water-stage recovers the 

mean daily discharge may be obtained by averaging discharge at 

regular intervals during the day, or by using the discharge integrator, 

an instrument operating on the principle of the planimeter and containing as an essential element the rating curve of the station.

In the table of monthly discharge the column headed "Maximum" 

gives the mean flow for the day when the mean gage height was 

highest. As the gage height is the mean for the day it does not 

indicate correctly the stage when the water surface was at crest 

height, and the corresponding discharge was consequently larger 

than given in the maximum column. Likewise, in the column 

neaded "Minimum" the quantity given is the mean flow for the 

day when the mean gage height was lowest. The column headed 

"Mean" is the average flow in cubic feet for each second during the 

month. On this average flow computations recorded in the remaining columns, which are defined on pages 2 and 3, are based.

The deficiency table presented for some of the gaging stations 

shows the number of days in each year on which the mean daily 

discharge was less than the discharge given in the table. By subtraction the table gives the number of days each year that the mean 

daily discharge was between the discharges given in the table and, 

also by subtraction, the number of days that the mean daily discharge was equal to or greater than the discharge given.

ACCURACY OF FIELD DATA AND COMPUTED RESULTS.

The accuracy of stream-flow data depends primarily (1) on the permanence of the stage-discharge relation and (2) on the accuracy of observation of stage, measurements of flow, and interpretation of records.

A paragraph in the description of the station or footnotes added 

to the tables gives information regarding the (1) permanence of the 

stage-discharge relation, (2) precision with which the discharge rating 

curve is defined, (3) refinement of gage readings, (4) frequency of 

gage readings, and (5) methods of applying daily gage heights to 

the rating table to obtain the daily discharge.1

For the rating tables "well defined" indicates, in general, that the 

rating is probably accurate within 5 per cent; "fairly well defined," 

within 10 per cent; "poorly defined," within 15 to 25 per cent. 

These notes are very general and are based on the plotting of the 

individual measurements with reference to the mean rating curve.

The monthly means for any station may represent with high accuracy the quantity of water flowing past the gage, but the figures

1 For a more detailed discussion of the accuracy of stream-flow data see Grover, N. C., and Hoyt, J. C., 

Accuracy of stream-flow data: U. S. Geol. Survey Water-Supply Paper 400, pp. 53-59, 1916.
COOPERATION. 0

showing discharge per square mile and run-off in inches may be 

subject to gross errors caused by the inclusion of large noncontributing districts in the measured drainage area, by lack of information concerning water diverted for irrigation or other use, or by 

inability to interpret the effect of artificial regulation of the flow of 

the river above the station. " Second-feet per square mile" and 

"run-off in inches" are therefore not computed if such errors 

appear probable. The computations are also omitted for stations on 

streams draining areas in which the annual rainfall is less than 20 

inches. All figures representing "second-feet per square mile" and 

"run-off in inches" previously published by the Survey should be 

used with caution because of possible inherent sources of error not 

known to the Survey.

Many gaging stations on streams in the irrigated areas of the 

United States are located above most of the diversions from those 

streams, and the discharge recorded does not show the water supply 

available for further development as prior appropriations below the 

stations must first be satisfied. To give an idea of the amount of 

prior appropriations, a paragraph on diversions is presented in each 

station description. The figures given can not be considered exact 

but represent the best information available.

The table of monthly discharge gives only a general idea of the 

flow at the station and should not be used for other than preliminary 

estimates; the tables of daily discharge allow more detailed studies 

of the variation in flow. It should be borne in mind, however, that 

the observations in each succeeding year may be expected to throw 

new light on data previously published.

COOPERATION.

The work of measuring streams in Texas during the two years 

ending September 30, 1920, was carried on in cooperation with the 

State through the Board of Water Engineers, consisting of W. T. 

Potter, chairman; C. S. Clark; and John A. Norris, to whom special 

acknowledgments are due for "the efficient and cordial manner in 

which they represented the State in the cooperative investigations.

Acknowledgments are due the United States Reclamation Service 

for records furnished and general assistance at the stations on Pecos 

River and Rio Grande in New Mexico, and to the United States 

Weather Bureau for climatologic data and equipment for the evaporation station near Austin.

The cities of Corpus Christi, Waco, and San Antonio; Wharton 

County; the Imperial Irrigation Co.; the Markham Irrigation Co.; 

the Garwood Irrigation Co.; the Lakeside Irrigation Co.; the Wharton County Association; the Pierce estate; the Texas & Pacific 

Railway; and the Pecos Valley Lines have aided in the collection of 

records by furnishing funds, or giving general assistance.
6 SURFACE WATER SUPPLY, 1919-1920, PART VIII. 

DIVISION OF WORK.

The data for stations in Texas and southeastern New Mexico, in 

the Rio Grande basin, were collected and prepared for publication 

under the direction of C. E. Ellsworth, district engineer, assisted by 

Clarence E. McCashin, Russell J. Hank, Donald A. Dudley, Harvey B. 

Kinnison, Edward P. Congdon, Andrew K. Gowans, Trigg Twichell, 

L. D. Snow, Robert G. West, H. C. Pritchett, John E. Powers, and 

Kate Casparis.

The manuscript was assembled and reviewed by B. J. Peterson 

and V. B. Lamoureux.

GAGING-STATION RECORDS.

TRINITY RIVER BASIN.

WEST FORK OF TRINITY RIVER AT BRIDGEPORT, TEX.«

LOCATION. At suspension bridge on Balsora-Bridgeport road, half a mile southwest 

of center of Bridgeport, Wise County, a quarter of a mile above Chicago, Rock 

Island & Gulf Railway Co.'s pumping plant, and 1 mile below mouth of Gentry 

Creek.

DRAINAGE AREA. 1,060 square miles (measured on standard topographic maps; postroute map; and topographic map of Texas, compiled in 1899 by Robert T. Hill, of 

United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. October 1, 1914, to September 30, 1920. Records of stage 

have been obtained by United States Weather Bureau from August 16, 1908, to 

October 16, 1915.

GAGE. Weight and tape gage of the Motttype, fastened to downstream side of bridge 

56 feet from north end of guard rail; read by Mrs. U. E. Byers.

DISCHARGE MEASUREMENTS. Made from downstream side of bridge or by wading.

 HANNEL AND CONTROL. Bed composed of clay, gravel, and sand. Banks are high, 

slightly wooded, and are overflowed at a stage of 25 feet. Channel straight above 

and below station for 109 feat. Control is rock outcrop three-quarters of a mile 

below station.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30,1919, 20.00 feet at 6 p. m. December 23 (discharge, 7,550 second-feet); no flow, 

October 4-18, June 17-21, August 5-16, and September L5-18.

Maximum stage recorded during year ending September 30, 1920, 23.77 feet at 

7 a. m. May 16 (discharge, 12,200 second-feet); minimum stage 0.77 foot at 7 a. m. 

June 17 (discharge, 0.6 second-foot).

1908-1920: Maximum stage recorded 28.9 feet June 8, 1915 (discharge not determined); no flow during several periods.

ICE. None reported.

DIVERSIONS. Practically the only diversion above station is by city of Bridgeport 

which diverts a small amount for municipal uses.

REGULATION. None.

ACCURACY. Stage-discharge relation practically permanent except for slight changes 

during floods. Rating curve well defined below 11,000 second-feet. Gage read 

to hundredths once daily and oftener during floods. Daily discharge ascertained 

by applying mean daily gage height to rating table, except October 6, 1918, to 

February 4, 1919, when indirect method for shifting control was used. Records 

good.

° Published in earlier reports as Trinity River at Bridgeport, Tex.
TRINITY RIVER BASIN.

Discharge measurements of West Fork of Trinity River at Bridgeport, Tex., during the years

ending Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 4

1919.

Mar. 21

June 14

Made by 

R.J. Hank.............

Gage 

height.

Ft.

1.77

.75

Discharge.

Sec.-ft.

0

7.5

«. 5

Date.

1919.

1920. 

Feb. 17

Made by 

C. E.Ellsworth........

Gage 

height.

Ft. 

1.76

1.73

1.80

Discharge.

Sec.-ft. 

31.6

20.4

25.5

« Estimated.

Daily discharge, in second-feet, of West Fork of Trinity River at Bridgeport, Tex., for the 

years ending Sept. SO, 1919 and 1920.

Day.

1918-19.

2.............

3.............

4.............

5.............

6.............

7.............

8.............

9.............

10.............

11.............

12. ............

13.............

14. ............

15. ............

16.............

17.............

18.............

19.............

20. ............

21.............

22. ............

23.............

24. ............

25.............

26. ............

27.............

28. ............

29.............

30. ............

31.............

Oct.

1.0 

.5 

.1 

0 

0

s §

0 

0 

0 

0 

0

0 

0 

0 

109 

9.4

2.7 

595 

. 85 

681 

667

1,710 

1,660 

2,030 

2,830 

1,580 

928

Nov.

376 

36

27 

18 

12

14 

2,180 

2,320 

765 

518

45 

17 

38 

20 

15

12 

8.8 

5.8 

3.3 

7.0

13 

12 

11 

10

8.8

17 

90 

136 

42 

19

Dec.

18 

18 

17 

16 

15

14 

13 

12 

10 

10

9.4 

8.5 

7.3 

6.5

5.8

4.5 

3.9 

8.2 

12 

561

1,320 

746 

2,720 

2,990 

2,430

1,860 

1,260 

295 

60 

34 

492

Jan.

127 

262 

273 

257 

146

99 

64 

36 

26 

16

14 

12 

17 

16 

16

20 

39 

45 

42 

34

28 

1,120 

1,420

787 

292

164 

1,170 

907 

1,140 

1,080 

885

Feb.

1,070 

2,490 

1,580 

768 

378

196 

177 

114 

79 

56

45 

30 

24 

19 

16

13 

10

8.8 

8.8 

25

19 

33 

30 

28 

34

30 

26 

24

Mar.

19 

16

14 

12 

10

8.5 

7.0 

9.1 

15 

14

7.0 

4.1 

1.9 

1.1

.7

34 

10 

7.6 

7.0

5.8

4.8 

3.7 

2.5 

160 

1,190

595 

417 

355 

160 

1,170 

969

Apr.

413 

179 

530 

277 

1,360

907 

1,540 

475 

1,360 

1,140

288 

160 

140 

120 

91

84 

46 

10 

7.9 

6.0

5.5 

4.1

2.9 

2.3 

2.0

1.5 

366 

16 

14 

10

May.

7.0 

3.5 

2.3 

1.7 

1.3

1.1 

390 

1,020 

330 

38

150 

487 

782 

1,320 

866

465 

4,830 

3,530 

2,210 

1,680

8i>9 

465 

156 

102 

549

3,510 

2,460 

1,020 

447 

306 

177

June.

140 

955 

144 

73 

48

25 

1.9

1.4 

1.1

.8

.6 

.5 

.8 

.5 

.4

.2 

0 

0 

0 

0

0 

321 

489 

192 

301

392 

47 

7.0 

1.4 

8.5

July.

213

248 

319 

47 

24

22 

2.1 

1.3 

1.6 

1.5

1.4 

1.2 

1.0 

1.0 

5.8

2.0 

2.1 

19 

775 

624

308 

46 

30 

12 

7.6

6.0 

4.8 

3.3 

1.9 

1.3 

1.1

Aug.

0.7 

.4 

.2 

.1 

0

0 

0 

0 

0 

0

0 

0 

0 

0 

0

0 

1.7 

2.5 

1.4 

1.6

1,400 

310 

26 

30 

43

17 

6.0 

2.3

28 

32 

43

Sept.

310 

179 

25 

71 

68

33 

30 

16 

2.4 

1.3

1.2 

1.7 

1.1 

1.3 

0

0 

0 

0 

.2

2.2

18 

321 

818 

87 

323

140 

15 

13

10

8.8
SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of West Fork of Trinity River at Bridgeport, Tex.,for 

the years ending Sept. 30, 1919 and 1920 Continued.

Day.

1919-20. 

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

2.............

3.............

5.............

6. ............

7.............

8.............

9.............

10.............

11.............

12.............

13.............

14.............

15.............

16.............

17.............

18.............

19. ............

20. ............

21.............

22..... .......

23.............

24.............

25.............

26. ............

27.............

28. ............

29.............

30. ............

31.............

Oct.

26 

11 

30 

3.1 

2.0

1.8 

566 

5,490 

3,700 

2,280

2,030 

1,650 

1,020 

321 

181

112 

198 

401 

401 

367

2,620 

3,340 

3,260 

2,310 

1,020

191 

183 

266 

518 

244 

185

Nov.

782 

332 

181 

185 

108

79 

175 

518 

662 

390

266 

332 

710 

196 

133

106 

93 

67 

55 

41

29 

22 

16 

10 

7.0

74 

74 

24 

22 

31

Dec.

30 

28 

24 

19 

16

12 

9.4

6.8 

4.5 

2.7

2.1 

1.9 

1.7 

1.5 

1.4

1.3 

1.0

.8 

1.7 

1.5

1.2

1.4 

1.6 

1.7 

1.9

2.0 

2.1 

2.0 

1.9 

7.3 

11

Jan.

8.8 

8.2 

8.8 

8.2 

8.5

15 

30 

288 

266 

61

244 

223 

200 

111 

53

55 

43 

35 

29 

27

25 

30 

65 

91

806

614

288 

144 

66 

38 

35

Feb.

28 

24 

22 

21 

20

19 

18 

17 

16 

24

16 

12 

10 

8.2

7 0

6.0 

8.8 

2.0 

1.5 

1.3

1.1

1.0 

.9 

.9

.8

2.5 

4.8 

7.0 

7.9

Mar.

7.0 

6.5 

5.8 

4.5 

4.1

3.5 

2.9 

2.5 

2.5 

2.4

2.3 

2.1 

1.9 

1.8 

1.8

1.7 

1.5 

1.8 

1.9 

2.0

1.9 

1.9 

1.8 

2.0 

2.4

11 

25 

16 

9.4 

7.0 

5.5

Apr.

4.5 

4.1 

3.5 

2.7 

2.5

2.4 

2.4 

2.3 

4.5 

6.0

35 

25 

23 

12 

7.6

7.0 

6.0 

4.5 

3.7 

2.9

2.4 

2.3 

2.1

5.0 

277

181 

174 

244 

321 

61

M ay.

67 

26 

12 

9.4 

5,410

9,200 

8,720 

2,900 

854 

2,520

3,950 

9,080 

5,660 

2,060 

3,340

11,600 

4,610 

1,650 

854 

470

192 

158 

135 

114 

96

86 

79 

62 

54 

41 

29

June.

25 

23 

14 

7.3

22

73 

31 

23 

16 

12

7.9 

5.8 

3.1 

1.8 

1.3

.9 

.6 

299 

4,510 

2,450

494 

1,070 

5,270 

424 

33

23 

19 

16 

13

8.5

July.

6.0 

3.5 

2.3 

1.8 

1.4

91 

321 

111 

30 

494

424 

378 

310 

185 

133

120 

100 

6.5 

638 

470

390 

183 

213 

80 

41

34 

28 

25 

21 

14 

10

Aug.

4.1 

1.7 

120 

22 

16

12 

7.3 

4.3 

5.8 

213

344 

1,240 

2,520 

1.470

662

332 

102 

35 

32 

26

19 

16 

14 

11 

14

,590 

3,380 

2,340 

,650 

,050 

590

Sept.

470 

344 

194 

638 

179

447 

4,460 

4,040 

7,640 

4,730

2,140 

1,170 

518 

158 

72

96 

60 

43 

34 

25

23 

22 

19 

16 

15

14 

12 

11

8.8 

8.5

NOTE. Oct. 1-4, 1918, gage removed for repairs; records partly estimated. Gage reading Sept. 19, 1919, 

n error; discharge interpolated.

i Monthly discharge of West Fork of Trinity River at Bridgeport, Tex.,for the years ending

Sept. 30, 1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

1919-20.

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

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

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

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

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

Discharge in second-feet.

Maximum.

2,830 

2,320 

2,990 

1,420 

2,490 

1,190 

1,540 

4,830 

955 

775 

1,400 

818

4,830

5,490 

782 

30 

806 

28 

25 

321 

11,600 

5,270 

494 

3,380 

7,640

11,600

Minimum.

0 

3.3 

3.9 

12

8.8 

.7 

1.5 

1.1 

0 

1.0 

0 

0

0

1.8 

7.0 

.8 

8.2 

.8 

1.5 

2.1 

9.4 

.6 

1.4 

1.7 

8.5

.6

Mean.

416

227 

483 

340 

262 

169 

319 

909 

105 

88. 2 

62.8 

83.2

290

1,060 

190 

6.50 

127 

10.6 

4.66 

47.7 

2,390 

497 

157 

576 

920

502

Run-off in 

acre-feet.

25,600 

13,500 

29,700 

20,900 

14,600 

10,400 

19,000 

55,900 

6,250 

5,420 

3,860 

4,950

210,000

65,200 

11,300 

400 

7,810 

610 

2,840' 287 

147,000 

29,600 

9,650 

35,400 

54,700

365,000
SURFACE WATER SUPPLY, 1919-1920, PART VIII.

BRAZOS RIVER BASIN. 

BRAZOS RIVER NEAR GRAHAM, TEX.

LOCATION. At two-span steel highway bridge on Murray road, 6 miles above mouth 

of Clear Fork and 10 miles west of Graham, Young County.

DRAINAGE AREA. 12,900 square miles (measured on post-route map, and topographic 

map of Texas, compiled in 1899 by Robert T. Hill, of the United States Geological 

Survey; scale, 1 ineh=25 miles).

RECORDS AVAILABLE. November 13, 1915. to March 25, 1920, when station was discontinued.

GAGE. Vertical staff on left downstream corner of middle pier; read by Mrs. John 

Timmons.

DISCHARGE MEASUREMENTS. Made from upstream side of bridge or by wading.

CHANNEL AND CONTROL. Channel straight above and below station. Bed composed 

of sand and clay and is free from vegetation; shifting. Left bank high and not 

subject to overflow; right bank is of medium he'ght and is overflowed during high

EXTREMES OF DISCHARGE. Maximum staga recorded during year ending September 30, 1919, 15.55 feet at 4 p. m. November 2 (discharge not determined); no 

flow October 8.

Maximum stage recorded during year ending September 30, 1920, 9.98 feet at 

lOa. m. October 12 (discharge not determined); minimum stage, 2.97 feet at 5 p. m. 

March 25 (discharge, 0.9 second-foot).

1916-1920: Maximum stage recorded. 15.55 feet at 4 p. m. November 2, 1919 

(discharge not determined); no flow for several periods in 1916, 1917, and 1918, 

and for one day, October 8. 1919.

ICE. None reported during year.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show that 

numerous diversions are made above station for mining, irrigation, and municipal 

uses, but total probably does not appreciably affect the flow except during low

REGULATION. None of consequence.

ACCURACY. Stage-discharge relation not permanent. Standard rating curve poorly 

defined below 1,600 second-feet, and extended above. Gage read to hundredths 

once daily. Records poor. Daily discharge, which was determined by indirect 

method for shifting control is not considered sufficiently accurate to warrant 

publication.

Discharge measurements of Brazos River near Graham, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 5

1919. 

Jan. 9

Made by 

R. J. Hank.............

Gage 

height.

Feet. 

4.03

4.30

3

JQ

5.10

Discharge.

Sec.-ft. 

ofl.5

99.3

5 A

91.0

Date.

1919. 

Aug. 16

1920.

Feb. 18

Made by 

C. E. Ellsworth........

Gage 

height.

Feet. 

3.99

4.27

3.82

Discharge.

Sec.-ft. 

46.1

95.9

38.9

o Estimated.
10 SURFACE WATER SUPPLY, 1919-1920, PART VIJl.

Monthly discharge of Brazos River near Graham, Tex., for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19.

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

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

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

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

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

1919-20. 

October 5-31.. ...........................................

Discharge in second-feet.

Maximum.

8,740 

166 

2,840 

1,720 

1,360 

2,830 

6,750 

6,860 

5,020 

5,830 

336

4.690 

2,490 

112

157 

432 

13

Minimum.

0 

11 

4.8 

42 

9.4 

6.2 

136 

572 

12 

7.6 

40 

9.1

414 

106 

31 

28 

13 

.9

Mean.

1,040 

42.9 

470 

348 

162 

392 

1,310 

2,130 

825 

858 

"168 

023.5

2,550 

755 

65 

74 

67 

5.4

Run-off in

acre-feet.

64,000 

2,550 

28,900 

21,400 

9,000 

24,100 

78,000 

131,000 

49,100 

52,800 

10,300 

792

472,000

137,000 

44,900 

4,000 

4,550 

3,850 

267

195,000

a Partly estimated.

NOTE. See "Accuracy" in station description, 

considerably greater than from Sept. 1-17, 1919.

No record Sept. 18-30, 1919; mean discharge probably

BRAZOS RIVER AT BRAZOS, TEX.

LOCATION. At Texas & Pacific Railway bridge half a mile northeast of Brazos, Palo 

Pinto County, and 1£ miles above mouth of Palo Pinto Creek.

DRAINAGE AREA. 20,200 square miles (measured on standard topographic map; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. October 1, 1914, to April 30, 1920, when station was discontinued. Records of stage have been obtained by the United States Weather 

Bureau since August 16, 1908.

GAGE. Vertical staff on northwest side Of and 1 foot from upstream edge of pier 

nearest the middle of the railway bridge; graduations above 6 feet painted on 

pier; read by R. C. Lindsay.

DISCHARGE MEASUREMENTS. Made from three-span highway bridge, about 600 feet 

below railway bridge, or by wading.

CHANNEL AND CONTROL. Bed composed of sand and gravel; shifts considerably. 

Right bank high, rocky, wooded, and not subject to overflow; left bank composed 

of sand, gravel, and clay, wooded, and medium in height, and subject to overflow 

at high water. Channel straight above and below for several thousand feet.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 10.0 feet at 5 p. m. July 22 (discharge, determined from extension of 

rating curve, 31,100 second-feet); minimum flow for year estimated at somewhat 

less than 30 second-feet in March.

Maximum stage recorded during period October 1, 1919, to April 30, 1920, 6.5 

feet at 8 a. m. October 22 (discharge, 11,100 second-feet); minimum stage, 0.4 foot, 

April 18-30 (discharge, 107 second-feet). Gage record unreliable, and these 

discharges subject to error.

1908-1920: Maximum stage recorded, 22.0 feet, May 24, 1908 (discharge not 

determined); no flow for several periods within period of record.
BRAZOS RIVEE BASIN. 11

ICE. None reported during year.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show 

that numerous small diversions are made above station for mining, irrigation, and 

municipal uses, but total probably does not appreciably affect the flow except 

during low stages.

REGULATION. None of consequence.

ACCURACY. Stage-discharge relation not permanent. Standard rating curve fairly 

well defined below 19,000 second-feet. Gage read to half-tenths once daily to 

November 30, 1919, and to tenths thereafter; reliability doubtful. Records 

poor. Data inadequate to determine discharge after September 30, 1919.

Discharge measurements of Brazos River at Brazos, Tex., during the years ending 

Sept. 30, 1919 and 1920.

Date.

1918.

1919.

Jan. 7

Mar. 19

June 10

Made by 

C. E. Ellsworth........

R. J. Hank.............

Gage 

height.

Feet.

1.82

.68

1.89

Discharge.

Sec.-ft. 

68.7

321

30.1

383

Date.

1919. 

Aug. 14

Dee. 6

1920.

Feb. 20

Made by 

T. Twichell... .........

C. E. Ellsworth........

D. A. Dudley..........

Gage 

height.

Feet. 

2.48

1.21

.47

Discharge.

Sec.-ft. 

656

212

121

Daily gage height, in feet, of Brazos River at Brazos, Tex., for the period Oct. 1, 1919,

to Apr. 30\ 1920.

Day.

1919-20. 

1. .........

2. .........

3..........

5..........

6..........

T. .........

8..........

9..........

10..........

11..........

12..........

13..........

14..........

15..........

Oct.

2.2

2.1

2.1

2.1

2.1

2.0

2

A

2.0

1.9

1.9

5.4

5.7

5.4

5.2

4.8

Nov.

4.8

4.6

4.4

A 9

4.0

2 Q

2.4

2.4

2.4

2.3

9 9^

2.15

2.4

9 f\R

Dec-.

1.70

1.70

1.70

1.70

1.70

1.20

Feb. Mar.

0.9

.8

.8

.8

.8

.7

.7

.7

.7

.6

.6

.6

Apr.

0.6

6

6

6

6

6

6

6

6

5

5

Day.

1919-20. 

16..........

17..........

18..........

19..........

20..........

21..........

22..........

23..........

24..........

25..........

26..........

27..........

28..........

29..........

30..........

31..........

Oct.

4.1

3.35

2.55

3.5

3.5

6.5

6.2

5.2

5.0

3.15

3.1

2.9

2.8

5.6

Nov.

2.4

2.4

2.3

2.2

2.15

2.1

2.1

1.70

1.50

1.50

1.65

1.80

1.80

1.90

1.70

Dec;. Feb.

0.47

Mar.

6

6

6

6

6

6

6

8

6

6

6

6

6

6

Apr.

.5

.5

.4

.4

.4

.4

.4

.4

.4

.4

.4

.4

NOTE. No record De3. 7,1919, to Feb. 19,1920, and Feb. 21-29,1920. 

Monthly discharge of Brazos River at Brazos, Tex., for the year ending Sept. 30, 1919

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

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

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

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

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

Discha

Maximum.

15,100

13,000

15,200

5,630

4,730

10 900

14^000

22,500

9,520

24,500

9,700

24,500

rge in second

Minimum.

34

375

252

238

88

151

1,080

390

137

174

34

-feet.

Mean.

2,600

1,740

1,680

976

1,020

1,060

2,990

7,520

2,470

3,390

1,350

548

2,300

Run-off

acre-feet.

160,000

104,000

103,000

60,000

56,600

65,200

178,000

462,000

147,000

208,000

83,000

32,600

1,660,000

NOTE. Determination of daily discharge not sufficiently accurate to warrant publication.
12 SUEFACE WATER SUPPLY, 1919-1920, PART VIII.

BRAZOS RIVER AT WACO, TEX.

LOCATION. At Southern Traction Co. 'a bridge just above suspension bridge on Bridge 

Street, Waco, McLennan County, 2£ miles below mouth of Bosque River, 4J miles 

above mouth of Cottonwood Creek, and 9 miles above lock No. 8. 

DRAINAGE AREA. 25,5003 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of United States Geological Survey; scale, 1 inch=25 miles). 

RECORDS AVAILABLE. September 14, 1898, to December 31, 1911; October 1, 1914, 

to September 30, 1920. Records of stage have been obtained by United States 

Weather Bureau since August 9, 1900.

GAGE. Gurley graph water-stage recorder installed March 29, 1918, on downstream 

side of pier of Southern Traction Co. 's bridge, 100 feet upstream from suspension 

bridge, inspected by Manton Hannah. Gage used from September 14, 1898, to 

February 29, 1908, was an inclined staff under left end of suspension bridge/ 

From March 1, 1908, to December 31, 1911, and October 1, 1914, to December 5, 

1917, record was obtained from a chain gage on downstream side of suspension 

bridge. From December 6, 1917, to March 28, 1918, gage was a vertical staff, 

painted on downstream side of pier of Southern Traction Co. 's bridge, the present 

location of the Gurley recorder. In 1902, a gage was marked off on (die north pier 

of a new single-span highway bridge 300 feet above suspension bridge, and was 

used for high-water readings. From August 9, 1900, to May 21, 1903, the United 

States Weather Bureau used a vertical gage painted on pier nearest the center of 

the Saint Louis, Southwestern Railway bridge. From September 25, 1914, to 

March 23, 1915, during reconstruction of suspension bridge, the chain gage was 

on one-span highway bridge 300 feet upstream. All gages were installed at same 

datum, but readings probably differ slightly because of differences in location.

DISCHARGE MEASUREMENTS. Made from upstream side of first one-span highway 

bridge above gage.

CHANNEL AND CONTROL. Bed composed of sand and gravel; shifts. Banks are clay, 

medium in height, have been improved by the city, and are overflowed at extremely high stages. Channel straight above and below for several thousand feet. 

Position of control not known.

EXTREMES OF DISCHARGE. Maximum stage during year ending September 30, 1919, 

from water-stage recorder, 36.4 feet at 4 a. m. November 9 (discharge, 125,000 

second-feet); minimum stage from water-stage recorder, 4.68 feet at 6 p. m. 

October 16, and 1p.m. October 17 (discharge, 73 second-feet).

Maximum stage during year ending September 30, 1920, from water-stage 

recorder, 27.9 feet at 5 a. m. October 23 (discharge, 78,100 second-feet); minimum 

stage from water-stage recorder, 4.96 feet from 7 a. m. May 4 to 4 a. m. May 5 

(discharge, 470 second-feet).

1898-1920: Maximum stage recorded, 39.7 feet December 3, 1913 (discharge not 

determined); no flow August 20-21, 1918.

ICE. None reported during year.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show 

that numerous small diversions are made above station for mining, irrigation, and 

municipal uses, but total probably does not appreciably affect the flow except 

during low stages.

REGULATION. None.

ACCURACY. Stage-discharge relation not permanent. Standard rating curve fairly 

well defined below 30,000 second-feet; above 30,000 second-feet curve based on 

one discharge measurement at discharge of 109,000 second-feet. Operation of 

water-stage recorder satisfactory except as indicated in footnote to daily-discharge 

table. Daily discharge determined by shifting-control method. Records good 

after July 29, 1919, because of more frequent measurements, and poor prior to 

that date.

3 Revised since publication of Water-Supply Paper 308.
BRAZOS RIVEB BASIN. 13

Discharge measurements of Brazos River at TFaco, Tex., during the years ending Sept. SO

1919 and 1920.

Date.

1918. 

Oct. 7

1919. 

Mar. 17 

24

27

Apr. l

July 29

18

28

16

26

Oct. 7

16

27

Nov. 5

20

Made by 

McCashin and Congdon

Ellsworth and Hank. . . . 

C. E. Ellsworth........

B.J. Hank ..........

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

department.

.....do.................. ...:.do.... ..............

Wagner and Green. ....

Gage 

height.

Feet. 

5.21 

6.98

6.01 

5.46

11.97

7.66

10.53

7.02

7 08

10.42

7.20

6.21

9

Q1

7.58

12.76

10.57

9.14

Discharge.

Sec-ft. 

177 

624

1,010 

616

2,330

10,200

1,640

993

1,120

4,810

1,170

447

3 ft in

1,350

12,300

8,340

5,570

3,830

Date.

1919. 

Dec. 1 

11

23 

1920.

13

26

Feb. 2

12

25

Mar. 3

13

21

Apr. 2

|o

24

May 13 

14

July 23

Made by 

Wagner and Green. ....

Wagner and Bubel ..... 

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

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

Wood and Bubel... ....

Ellsworthand McCashin 

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

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

Gage 

height.

Feet. 

11.18 

8.36

7.50 

6.90

11.98

9.32

8.20

7.02

6.60

6.30

5.87

5.50

7.98

5.58

5.15

17.38 

13.40

6.45

6.66

Discharge.

Sec-ft. 

6,940 

2,820

1,990 

1,390

9,860

4,960

3,400

2,130

1,820

1,390

1,280

904

3,510

983

596

29,700 

14,400

1,070

1,010

NOTE. Measurements from Aug. 18, 1919, to Apr. 24,1920, made by engineers from city engineer's 

office at Waco.

Daily discharge, in second-feet, of Brazos River at Waco, Tbx.,for the years ending Sept.

30, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11.............

12..............

13..............

14..............

15........ .....

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29.............. 

30.............. 

31..............

1 (19793-

Oct.

501

390

314

265

230

200

174

159

140

123

113

106

108

95

81

75

554

3,440

2,690

2,060

3,640

6,720

4,840

11,800

16,400

10,100

23,900 

27,100 

12,600

99

Nov.

8,210

6,420

4,860

3,660

2,990

2,450

7,120

89,700

99,800

24,500

15,700

10,900

7,250

5,220

13,800

12,700

3,780

2,220

1,780

1,470

1,290

1,170

1,080

1,010

1,080

1,080

1,170

1,690 

1,900

 uraTiFifl

Dec.

1,490

1,500

1,340

1,070

928

838

786

737

681

612

566

572

16,200

6,830

2,120

1,410

1,160

1,010

1,020

4,740

8,430

3,800

24,600

42,400

16,800

9,890

5,930

4,560 

4,100 

3,560

o

Jan.

2,990

2,320

1,790

1 4«n

1,280

1,170

1,090

1,020

898

765

667

600 via

606

1,740

4,070

8,540

7,350

7,220

12, 100

25,300

17,600

11,200

10, 100

8,820

15,700

9,380 

9,090 

7,720

?

Feb.

10,900

19,600

9 SQft

6,700

5,480

4 680

4,760

4,140

3,540

3,260

2,980

2,690

2,520

 2,100

1,890

1,790

1,820

1,840

2,240

2,320

1,990

1,770

1,610

1,510

1,430

1,350

1,290

Mar.

1,200

1,150

1,110

1,080

1,090

1,090

1,010

1,060

1,130

1,050

942

890

838

830

830

1,250

1,070

920

765

695

648

636

630

667

8,830

4,740

2,550

4,880

7,580 

23,100 

33,800

Apr.

10,600

6,990

10,400

9,420

6,700

4 820

4,380

7,800

10,800

8,210

4,740

3,500

3,040

2,450

2,010

4,000

3,420

2,450

1,980

1,610

1,300

1,070

890

751

636

554

490

490

8,260 

7,980

May.

14,700

7,700

6,760

4,940

3,680

5,160

4,560

7,450

3,460

15,200

10,800

8,000

7,550

8,820

9,090

8,870

12,000

10,300

9,320

8,900

13,300

8,430

5,370

4,700

5,180

4,380

9,530

13,900

22,300 

21,600 

16,900

June.

11,100

8,130

5,660

4,010

3,080

2,630

2,220

1,830

1,610

2,050

2,620

1,770

1,240

1,050

950

1,190

3,020

2,380

3,800

9,590

12,300 

9,860

July.

10,200

7,580

4,800

4,140

3,420

3,220

3,060

2,900

2,330

1,990

1,680

1,420

1,200

1,010

882

786

1,090

1,380

860

716

6,700

10,700

23,600

19,800

10,200

8,840

8.620

7,650

5,410 

4,010 

3,170

Aug.

2,560

2,090

1,760

1,560

1,380

1,180

974

943

912

1,840

1,760

1,680

1,600

1,520

1,440

1,370

1,290

1,210

1,130

1,460

28,300

21,500

11,700

13,700

7,650

7,220

4,460

4,440

3,660 

2,810 

2,200

Sept.

1 830

1^730

1,850

1,500

1,320

1,220

1,250

1,280

1,050

890

772

660

577

522

485

465

435

412

381

36,900

10,600

39,100

26,400

8,080

4,800

3,280

2,820

3,820

3,500

2,840
14 SURFACE WATER SUPPLY, 191&-1920, PART VIII.

Daily discharge, in second-feet, of Brazos River at Waco, Tex.,for the years ending Sept.

30, 1919 and 1920.

Day.

1919-20. 

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

3..............

4..............

5..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18......... ....

19..............

20..............

21..............

22........ .....

23..............

24..............

25..............

26..............

27..............

28..............

29. .............

30..............

31..............

Oct.

2 300

2' 020

1 740

l'570

1,450

1,370

7,850

6,540

35,600

8,920

12, 500

17,800

34,300

14,100

8,100

5,000

39 900

27,300

14, 100

9,500

4,900

4,200

Nov.

13,500

16,400

7,600

5,410

4 800 s'loo

33,800

48 600

oq onn

10, 100

8,380

8,100

6,540

5,100

4 400

3' 880

3,050

2,750

2,450

2

oon

8 920

4*700

13,800

34,700

11 300 '

Dec.

7,100

5,860

4 900

4^500

4 400

4 500 4' 100

3,800

3,420

3 OCA

2 QQQ

2? 900

2^820

2 ftAf\

2,300

O QQfi

2,240

2,520

2 700

O QQft

2.010

1,920

1,730

1,670

1,640

1 f\S2fi

1 480

l'440 '

Jan.

1,380

1,220

1 080

1*070

1,760

1 1\ Sfift

9,200

13, 100

7,850

6,990

23 300

11^300

6 990

5^980

5 osfl

5,300

4,200

3 720

3' 420

3 200

3' 120

9,200

6,650

5,100

4,700

4,130

3,850

3,580

Feb.

3,580

3,500

3 220 3' ooo

2,780

2,690

2,620

2,520

2 660

4,' 300

4,700

2,990

2 600

2,540

2,440

2,320

2,100

2,010

1,970

1,870

1,790

1,720

1,620

1,570

Mar.

1,440

1,380

1,370

1,460

1,290

1,320

1,290

1,370

1,380

1,450

1,460

1,380

1,310

1,240

1,180

1,130

1,100

1,080

1,050

1,030

974

928

905

928

5,640

14, 800

4,700

2,980

2,160

1,700

1,510

Apr.

1,390

2,680

2,340

1,600

1,330

1,160

1,150

1,120

1,120

1,090

1,090

1,010

974

982

966

882

845

815

751

716

654

624

600

600

618

612

600

583

549

538

May.

527

511

490

475

606

3,760

19,500

28, 100

21,000

24,100

41,400

37,500

28,600

15, 100

16,800

26, 100

34,300

37, 100

30,700

17,800

15, 100

14,800

12,500

7,600

5,000

4,020

3,420

3,200

2,600

2,200

2,980

June.

3,880

3,500

8,650

6,310

3,500

3,420

2,690

1,980

1,630

1,420

1,350

1,210

1,250

1,430

1,250

1,170

1,060

990

1,110

3,600

22,900

20,000

13,500

14,400

17,500

8,650

6,420

4,900

3,800

3,050

July.

2,500

2,020

1,720

1,480

2,050

1,850

1,760

1,750

2,450

3,200

2,360

1,450

1,270

1,110

1,460

1,090

890

772

667

793

1,090

1,280

1,010

1,250

1,570

1,120

1,050

765

681

744

667

Aug.

566

554

594

554

636

6,310

7,980

4,900

2,680

1,840

1,850

1,460

6,760

6,990

8,100

5,410

11,000

6,310

6,650

9,200

12,800

21,400

13,500

13,100

26,500

15, 100

11,000

13, 100

8,650

9,800

6,880

Sept.

7,350

7,850

6,760

6,990

5, 520

4,100

40,400

45,500

43,400

36,100

21, 800

16,400

12,500

8,920

6,760

5,410

4,700

3,880

3,200

2,750

2,300

2,160

2,020

1,750

1,560

1,430

1,310

1,220

1,120

1,060

NOTE. Discharge, June 21-28, 1919. estimated 24,000 second-feet. Discharge interpolated, Aug. 11-18, 

1919; Jan. 29,30,1920. Gage heights from U. S. Weather Bureau gage used for determining dischargeiJune 

19,20,22-25,1920. Gage heights partly estimated Oct. 24-25, Nov. 9-10, Dec. 6-7, 1919; Jan. 31, Apr. 4-6, 

May 5-10, and Sept. 4,1920.

Monthly discharge of Brazos River at Waco, Tex.,for the years ending Sept. 30, 1919 and 9 y J mo.

Month.

1918-19.

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

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

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

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

1919-20.

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

Discharge in second-feet.

Maximum.

27,100 

99,800 

42,400 

25,300 

19, 600 

33,800 

10,800 

22,300

23,600 

28,300 

39,100

99,800

64,400 

48,600 

7,100 

23,300 

4,700 

14,800 

2,680 

41,400 

22,900 

3,200 

26,500 

45,500

64,400

Minimum.

75 

1,010 

566 

501 

1,290 

630 

490 

3,460 

950 

716 

912 

381

75

1,370 

2,380 

1,440 

1,070 

1,570 

905 

538 

475 

990 

667 

554 

1,060

475

Mean.

4,580 

11,300 

6,230 

5,840 

3,990 

3,490 

4,390 

9,450 

9,470 

5,270 

4,430 

5,360

6,150

12,400 

11,800 

2,940- 

6,180 

2,640 

2,030 

1,000 

14,800 

5,550 

1,420 

7,810 

10,200

6,580

Run-off 

in 

acre-feet.

282,000 

672,000 

383,000 

359,000 

222,000 

215,000 

261,000 

581,000 

564,000 

324,000 

272,000 

319,000

4,450,000

762,000 

702,000 

181,000 

380,000 

152,000 

125,000 

59,500 

910,000 

330,000 

87,300 

480,000 

607,000

4,780,000

NOTE. See footnote to table of daily discharge.
BRAZOS RIVER BASIN. 15

Days of deficiency in discharge of Brazos River at Waco , Tex.,for the years ending Sept. 30,

" 1901-1910 and 1915-1920.

Discharge

insec- ondfnnt IccL*

100

200

300

400

500

600

700

800

900

1,000

1,200

1,400

1,600

1,800

2,000

2,500

3,000

4,000

5,000

6,000

-7,000

8,000

9,000

10,000

15,000

20,000

40,000

60,000

80,000

100,000

150,000

Days of deficient discharge.

£O5

34

73

115

164

199

220

242

256

266

274

288

296

299

301

306

314

326

337

345

349

352

354

357

358

361

363

365

°?

%

76

124

141

152

163

177

192

206

222

235

250

265

279

292

302

314

323

327

337

342

346

350

351

352

357

359

361

363

365

1a>

1

.17

33

42

71

98

130

168

184

192

217

230

243

256

259

274

293

320

332

339

342

348

352

354

359

361

365

8O5

14

98

125

148

181

202

215

239

254

260

280

286

298

300

304

313

322

333

344

349

354

356

357

360

364

365

366

>o

a>

15

63

98

126

136

141

153

161

164

184

195

214

227

233

245

252

274

291

308

314

320

329

331

343

354

362

364

364

365

s<3>

16

79

106

130

145

160

168

172

196

210

233

242

249

279

297

315

322

335

340

343

347

352

359

361

364

365

tO5

1

17

61

102

131

153

179

220

233

265

271

290

298

302

317

325

338

347

354

355

357

358

359

365

s§

2

20

31

43

56

65

73

97

109

153

183

218

232

250

274

291

307

318

325

329

333

335

337

343

348

356

359

360

363

366

S

<3>

203

260

287

300

307

310

314

315

317

317

326

328

335

340

311

345

348

353

356

358

358

360

360

360

360

362

365

o

eV

O5

144

220

246

260

282

293

294

305

310

314

322

329

336

338

341

347

348

350

351

352

355

357

357

357

362

362

365

"5

4

O5

""4"

28

38

42

49

53

67

83

124

152

176

199

204

223

245

277

294

306

314

316

321

326

339

344

354

357

361

365

CO

J>

05

 

32

76

132

164

177

189

198

211

218

231

247

258

265

273

287

298

317

327

335

342

344

347

352

357

359

361

365

365

366

tCO

O5

91

202

234

250

260

270

277

288

294

307

319

332

338

342

346

350

353

356

362

363

364

361

384

364

365

00

tl

O5

208

234

247

258

263

267

273

278

284

289

292

308

313

316

320

329

329

337

342

345

348

352

352

355

363

365

\

O5

00

O5

3

10

13

16

22

31 '43

51 :ei

.68

99

118

131

147

159

175

189

214

241

250

258

273

289

301

329

338

362

363

363

365

o

!O5

 

.'.'.'.'.

... 

11

23

29

33

41

67

91

111

126

134

162

187

217

241

256

274

282

294

299

324

336

360

365

366

BRAZOS RIVER NEAR COLLEGE STATION, TEX.

LOCATION. At Jones' Bridge, 4 miles below Munson Shoals, 6 miles southwest of College Station, Brazos County, 19 miles above mouth of Yegua River, and 30 miles 

above mouth of Navasota River.

DRAINAGE AREA. 35,400 square miles (measured on standard topographic maps; 

post-route map, and topographic map of Texas compiled in 1899 by Robert T. 

Hill, of United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. February 23, 1918, to September 30, 1920.

GAGE. Vertical staff in two sections on fourth piar from right bank. Section 0 to 

14 feet is attached to sheet piling around footing of pier. Section 14 to 52 feet is 

painted on same pier. Read by Will Reaves or Ed Phillips.

DISCHARGE MEASUREMENTS. Made from bridge to which gage is attached.

CHANNEL AND CONTROL. Bed composed of sand and mud; shifting. Location of 

control not known. Banks high and free from vegetation. Right bank subject 

to overflow at extremely high stages (about 40 feet).

EXTREMES op DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 41.0 feet at 8.30 a. m. November 11 (discharge, 69,300 second-feet, 

determined from extension of rating curve); minimum stage, 4.3 feet at 6 a. m. 

October 16, and 6 p. m. October 16 and 17 (discharge, 272 second-feet).

Maximum stage recorded during year ending September 30, 1920, 41.5 feet at 

6 a. m. October 25 (discharge, 70,500 second-feet, determined from extension of 

rating curve); minimum stage, 6.2 feet at 9 a. m. August 1 (discharge, 945 

second-feet).

1918-1920: Maximum stage recorded in 1920 (see above); minimum stage 3.75 

feet September 4, 1918 (discharge, 92 second-feet).
16 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

ICE. None reported during years.

DIVERSIONS. No important diversions above or below station.

REGULATION. None. A lock and dam is being constructed by the War Department 

about 25 miles upstream, which may eventually regulate the flow during extremely low stages.

ACCURACY. Stage-discharge relation not permanent. Rating curve well defined 

below 40,000 second-feet. Gage read to half-tenths twice daily. Discharge 

ascertained by shifting-control method. Records fair.

Discharge measurements of Brazos River near College Station, Tex., during the years 

ending Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 9

!Nov. 9

9

10

Dec, 11

1919.

July 30

Made by 

C. E. McCashin........

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

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

Cashin...............

Ellsworth and Norris...

Gage 

height.

Ft. 

4.87

26.79

28.95

36.45

6.00

10.98

13.50

Discharge.

Sec. -ft. 

486

o38,200

c f\R firtft

1,160

5

*7QA

8,810

Date.

1919. 

Sept. 8

1920.

Mav 1H

17

Made by 

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

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

Gage 

height.

Ft. 

7.40

10.4

9.57

19.25

30.0

8.10

Discharge.

Sec.-ft. 

2,140

6,750

4,190

20,500

<*52,900

2,400

a Surface velocities observed and coefficient of 0.72 used to reduce to mean velocity. 

& Surface velocities observed and coefficient of 0.80 used to reduce to mean velocity, 

c Surface velocities observed and coefficient of 0.90 used to reduce to mean velocity. 

<J Measurement made during rising stage,

Daily discharge, in second-feet, of Brazos River near College Station, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day. 

1918-19. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16. .............

17..............

18. .............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29.............. 

30.............. 

31..............

Oct.

1,550 

1,480 

1,310 

1,090 

903

759 

726 

605 

500 

436

456 

627 

536 

368 

302

272 

278 

376 

546 

2,030

2,570 

2,200 

2,220 

6,350 

5,970

10,100 

13,200

19,900 

15,800 

19,000 

27,3001

Nov.

18,400 

11,500 

8,430 

6,450 

4,570

3,090 

3,110 

4,720 

39,400 

61,000

66,200

33,500 

19,800 

17,000 

17,100

22,100 

22,100 

15,500 

8,110 

5,970

5,840 

3,930 

2,710 

2,520 

2,190

2,140 

2,010 

2,360 

3,030 

3,150

Dec.

2,970 

2,660 

2,440 

2,280 

2,100

1,800 

1,570 

1,460 

1,370 

1,270

1,200 

1,180 

2,990 

19 600

19 300

10,700 

6,920 

4,460 

3,310 

2,860

3,760 

11,900 

13,100 

31,500 

46,100

39,600 

35,500 

23,000 

14,300 

11,300 

10,200

Jan.

9,400 

7,720 

5,530 

4,880 

3,810

3,290 

3,410 

3,110 

2,870 

2,660

2,650 

2,570 

2,400 

2,100 

2,200

5,420 

8,110 

12,300 

12,900 

12,400

10,800 

14,500 

23,500 

37,800 

36,300

26,400 

20,000 

16,300 

20,200 

17,300 

15,900

Feb.

13,900 

11,600 

24,800 

32,700 

22,500

15,100 

12,000 

10,200 

8,440 

8,110

7,560 

6,060 

5,700 

5,310 

4,500

4,380 

5,300 

5,690 

7,600 

10,200

14,100 

11,300 

6,720 

5,040 

4,350

3,480 

3,440 

3,180

Mar.

3,000 

2,980 

2,560 

2,560 

2,560

2,550 

2,550 

2,550 

2,550 

2,470

3,020 

2,740 

2,500 

2,160 

2,150

2,140 

2,140 

2,690 

3,400 

2,910

2,280 

1,940 

1,720 

1,430 

1,430

12,500 

19,600 

14,400 

10,400 

14,000 

29,200

Apr.

42,000 

24,300 

16,300 

16,800 

18,800

13,000 

10,700 

8,500 

10,300 

14,000

12,200 

8,240 

6,200 

5,470 

4,680

4,290 

4,510 

5,450 

4,560 

3,830

3,340 

3,290 

3,040 

2,680 

2,440

2,430 

2,350 

2,350 

2,040 

4,930

May.

13,800 

22,800 

17,800 

12,900 

11,100

6,670 

9,970 

14,200 

15,800 

12,400

21,900 

18,900 

15,700 

16,200

15,600

14,700 

12,800 

15,600 

15,500 

14,600

14,200 

19,800 

16,600 

15,500 

18,700

18,100 

15,500 

20,800 

23,900 

27,300 

27,200

June.

19,700 

16,100 

12,600 

9,610 

7,840

5,860 

4,630 

4,090 

3,890 

4,630

4,130 

5,840 

7,310 

4,670 

4,130

12,200 

12,600 

13,700 

18,500 

18,200

17,400 

16,900 

13,100 

11,600 

10,500

18,500 

37,000 

48,300 

46,200 

42,000

July.

32,500 

30,100 

24,200 

,.17,300 

12,900

10,700 

8,420 

7,610 

9,330 

13,400

10,700 

5,750 

4,490 

3,960 

3,760

3,050 

3,050 

4,000 

4,480 

7,610

8,410 

11,400 

21,500 

31,200 

32,300

21,400 

17,300 

13,200 

11,500 

9,430 

7,150

Aug.

5,650 

4,730 

3,980 

3,480 

3,030

2,780 

2,250 

2,210 

2,210 

2,400

2,140 

3,280 

3,750 

2,560 

2,210

2,210 

1,910 

1,480 

1,480 

1,480

1,870 

24,700 

42,500 

33,700 

22,300

17,700 

17,300 

12,900 

11,900 

9,000 

7,870

Sept.

5,340 

4,010 

3,490 

2,880 

3,400

2,830 

2,430 

2,260 

2,070 

2,220

2,030 

1,840 

1,270 

1,270 

1,270

1,730 

2,180 

2,610 

2,410 

1,840

26,800 

13,900 

34,700 

43,800 

30,500

21,800 

13,600 

8,440 

6,880 

7,210
BRAZOS RIVEE BASIN. 17

Daily discharge, in second-feet, of Brazos River near College Station, Tex., for the years 

ending Sept. SO, 1919 and 1920 Continued.

Day.

1919-20. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

n... ...........

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30.............. 

31..............

Oct.

6,140 

5,110 

4,870 

4,530 

3,800

3,800 

3,700 

5,350 

6,860 

11,400

19,000 

44,500 

42,200 

38,700 

37,600

39,900 

46,800 

59,400 

48,100 

35,200

27,500 

34,600 

60,800 

70,000 

69,300

48,100 

36,300 

29,300 

24,900 

21,700 

20,400

Nov.

21,700 

28,200 

30,400

i 22,700 

17,900

17,100 

15,700 

16,700 

38,100 

46,300

62,900 

56,400 

37,200 

31,700 

29,100

25,300 

20,000 

16,900 

14,900 

13,700

11,700 

10,600 

10,500 

10,300 

9,560

9,560 

12,600 

17, 100 

17,100 

36,500

Dec.

24,40( 

19,40( 

16,30t 

14,90C 

14,90(

14,90C 

12,40C 

10,800 

11,OOC 

16,30C

17,500 

12,800 

11,200 

10,300 

9,560

8,800 

8,140 

7,820 

9,560 

11,200

11,000 

10,800 

9,200 

7,980 

7,500

7,660 

7,500 

7,020 

6,420 

6,560 

6,420

j Jan.

) 6, 14C 

) 6, 14C 

6,140 

6,OOC 

6,700

14,500 

29,300 

27,300 

30,600 

26,000

17, 700 

27,300 

43,800 

41,700 

34,600

29,900 

24,900 

21,500 

18,100 

16,100

14,300 

13, 700 

17,900 

42,400 

47,000

45,200 

35,000 

22,300 

17,700 

15,100 

13,500

Feb.

12, 60C 

11,700 

11,200 

8,48C 

10,300

8,840 

8,660 

8,660 

8,300 

8,300

8,300 

8,140 

12,600 

13,300 

12,300

11,400 

8,660 

8, 140 

7,980 

7,500

7,340 

6,420 

6,420 

6,420 

6,420

6,000 

5,480 

5,110 

5,110

Mar.

5, 11C 

' 5, 11C 

5, lit 5, lie

6,140

5,870 

4,990 

4,990 

4,640 

4,530

4,530 

4,530 

4,530 

3,900 

3,900

3,900 

3,900 

3,900 

3,900 

3,700

3,700 

3,700 

2,960 

2,960 

2,960

2,870 

16,700 

" 9,200 

6,700 

4,310 

4,750

Apr.

1

4,640 

4,64C 

4,310 

4,420 

4,64C

3,900 

3,600 

3,500 

3,320 

2,780

2,780 

2,700 

2,700 

2,700 

2,620

2,540 

2,540 

2,540 

2,540 

2,220

1,920 

1,920 

2,000 

1,850 

1,850

1,780 

1,780 

2,150 

2,460 

2,080

May. June.

1,70C 

1,700 

1,700 

1,700 

1,700

1,7001 

1,560 

12,800 

23,200 

22,100

27,300 

34,800 

33,000 

31,900 

21,700

30,600 

41,700 

51,400 

52,300 

44,500

28,000 

19,400 

19,600 

17,500 

12,600

9,380 

8,480, 

8,300 

7,820 

7,340 

5,350

5,230 

5,230 

5,230 

9,020 

11,000

9,560 

6,560 

7,660 

5,610 

4,100

3,700 

3,140

2,870 

2,780 

2,620

2,700 

2,460 

2,300 

4,100 

5,480

6,280 

21, 100! 

19,600 

17, 100 

17, 900

17,100

10,800 8,140! 6.560 

5', 610

July.

5,23£ 

5, IK 

4,53C 

4,10C 

3,140

4,10C 

4,640 

3,140 

2,870 

2,780

2,780 

3,410 

3,900 

3,600 

2,540

2,300 

3,050 

2,300 

2,080 

1,700

1,560 

1,560 

1,560 

2,300 

2,000

1,700 

2,000 

2,220 

1,490 

1,490 

1,280

Aug. Sept.

1,080 

1,420 

2,000 

2,080 

1,21C

1,210 

2,220) 

13,300 

16,500 

17,300

14,100 

10,500 

5,480 

6,420 

8,840

8,480 

8,480 

13,300 

9,920 

8,840

9,740 

14,500 

21,500 

16,300 

14,300

24,200 

19,400 

14,300 

15,300 

10,800 

10,500

8,660 

7,820 

8,480 

8,300 

8,140

6,860* 

8,660- 

29,900* 

46, 80O 

45,600

41,000 

35,400 

22,100 

17,100 

12,800

10,300 

9,560 

8,140 

7,340 

5,870

4,990 

4,100 

3,900 

3,800 

3,230

3,230 

2,960 

2,960 

2,960 

2,220

NOTE. Discharge June 5,1920, interpolated.

Monthly discharge of Brazos River near College Station, Tex., for the years ending Sept.

30, 1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

1919-20.

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

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

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

Discharge in second-feet.

Maximum.

27,300 

66,200 

46,100 

37,800 

32,700 

29,200 

42,000 

27,300 

48,300 

32,500 

42, 500 

43,800

66,200

70,000 

62,900 

24,400 

47,000 

13, 300 

16,700 

4,640 

52,300 

21, 100 

5,230 

24,200 

46,800

70,000

Minimum.

272 

2,010 

1,180 

2,100 

3,180 

1,430 

2,040 

6,670 

3,890 

3,050 

1,480 

1,270

272

3,700 

9,560 

6,420 

6,000 

5,110 

2,870 

1,780 

1,350 

2,300 

1,280 

1,080 

2,220

1,080

Mean.

4,510 

13,900 

10.700 

11,200 

9,760 

5t 200 

8,770 

16,700 

15,100 

13,000 

8,290 

8,570

10,500

29,400 

23,600 

11,300 

23,200 

8,620 

4,940 

. 2,850 

18,800 

7,720 

2,790 

10,400 

12,800

13,100

Run-off in 

acre-feet.

277,000 

827,000 

658,000 

689,000 

542,000 

320,000 

522,000 

1,030,000 

898,000 

799,000 

510,000 

510,000

7, 580, 000

1,810,000 

1, 400, OOO 

695,000 

1, 430, OOO 

4%, 000 

304,000 

170,000 

1. 160, 000 

459,000 

172,000 

640,000 

762,000

9,500,000
18 SURFACE WATER SUPPLY, 191&-1920, PART VIII.

CLEAR FORE OF BRAZOS RIVER NEAR ELIASVILLE, TEX.

LOCATION. At new suspension highway bridge 2| miles northeast of Eliasville, 

Young County, 4| miles southwest of South Bend, 6 miles above mouth of stream, 

and below all tributaries.

DRAINAGE AREA. 5,650 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. November 12, 1915, to April 30, 1920, when station was discontinued.

GAGE. Staff gage on left bank below bridge used for stages below 6.7 feet; chain 

gage on downstream side of bridge used for stages above 6.7 feet. Read by Gilmer 

Vaughn.

DISCHARGE MEASUREMENTS. Made from bridge or by wading.

CHANNEL AND CONTROL. Banks high, wooded, composed of clay and gravel, and 

not subject to overflow. Bed composed of sand and gravel; free from vegetation. 

Channel straight above and below station. A shoal about 600 feet below station 

serves as control for low and maiium stages; control shifts during changing stages .

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 

30, 1919,27.2 feet at 5.40 p. m. May 27 (discharge, 12,500second-feet, determined 

from extension of rating curve); minimum stage, 2.90 feet October 8 (discharge, 

1.6 second-feet).

Maximum stage recorded during year ending September 30, 1920, 10.9 feet at 

5 p. m. October 21 (discharge, 2,800 second-feet); minimum stage, 2.90 feet from 

8 a. m. April 24 to 8 a. m. A,pril 26 (discharge, 1.4 second-feet).

1916-1920: Maximum stage recorded, 27.2 feet at 5.40 p. m. May 27, 1919 

(discharge, 12,500 second-feet, determined from extension of rating curve) ; no 

flow for extended periods.

ICE. None reported during year.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show 

that numerous small diversions are made above station for mining, irrigation, and 

municipal uses which probably reduce the flow considerably during low stages. 

Two diversions are made for irrigation between station and confluence of Clear 

Fork and Brazos River.

REGULATION. None of consequence except possibly during extremely low stages.

ACCURACY. Stage-discharge relation not permanent. Standard rating curve fairly 

well defined below 9,000 second-feet. Gage read to hundredths twice daily. 

Mean of two daily gage readings during low stages may not be true index of mean 

daily flow because of regulation for power above station. Daily discharge 

ascertained by indirect method for shifting control. Records fair.

Discharge measurements of Clear Fork of Brazos River near Eliasville, Tex., during the 

years ending Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 5

1919.

Mar. 20

Made by 

C. E. Ellsworth........

R. J. Hank. ...........

Gage 

height.

Feet. 

3.06

3.26

Discharge.

Sec.-ft. 

4.3

5.4

229

Date.

1919.

Dec 4

1920.

Feb. 18

Made by 

T. TwicheU. ...........

D. A. Dudley..........

Gage 

height.

Feet. 

3.71

3.60

Discharge.

Sec.-ft. 

39.0

32.1
BRAZOS RIVER BASIN. 19

Daily discharge, in second-feet, of Clear Fork of Brazos River near Eliasville, Tex., for 

the period Oct. 1, 1918. to Apr. 30, 1920.

Day.

1918-19. 

1.....

2.....

3.....

4...,.

6.....

7.....

8.....

9.....

10......

11......

12......

13......

14......

15......

16......

17......

18......

19......

20......

21......

22......

23......

24......

25......

26......

27......

28......

29......

30......

31......

1919-20. 

1......

3......

4......

5......

6......

7......

9......

10......

11......

19

13

14......

15......

16......

17......

1Q

20......

21

99

00

24......

OC

26......

27......

OQ

on

°.n

31......

Oct.

2.9

2.4

2.2

3.4

4.5

3.8

2.8

1.7

1.6

9.2

10

1,630

1,230

2,090

1,230

593

162

82

54

39

26

2,670

4,680

4,370

1,350

2,540

7,830

6,340

4,970

3,620

3,220

33

25

23

23

75

75

69

553

1,710

2,270

453

197

133

90

66

80

401

281

106

97

1,410

1,190

OQO

246

222

176

 tot;

63

144

194

73

Nov.

316

130

80

63

47

40

1,570

4,390

569

449

409

281

130

58

40

40

32

33

24

18

18

18

18

15

15

18

21

24

26

28

573

385

405

190

104

149

52

67

312

985

425

267

116

72

62

59

44

34

34

38

33

16

14

12

6.0

16

19

00

19

Dec.

18

17

171°.

8

Q

8

0

10

11

Q Q

la

10

8.0

6.4

7.2

6.8

6.4

8.0

6.8

1,380

765

725

4,110

3,840

1,790

1,320

425

180

99

147

99

20

19

19

24

22

19

20

19

16I 1?

13I 1?

I 1?

I 1?

13

14

12

11

9.0

7.0

7.0

s n

11

12

11

9 0

9 0

9 0

9 0

10

is

Jan.

71

56

47

d.9

3n

30

30

30

21

18

16

11

12

15

18

19

16

12

12

12

16

3,040

1,280

597

183

1,240 017

330

190

149

11

9 0

9 0

s n

9.0

11

10

5.5

9 2

9.2

10

10

1 ft

22

40

43

37

41

07

37

48

65

340

OQC

149

80

65

65

60

60

Feb.

104

1,190

413

109

CQ

45

33

26

21

21

13

14

11

11

9.6

7.6

6.8

6.8

6.4

6.0

5.8

4.8

4.0

5.0

5.5

4.8

4.8

3.2

KA

47

53

50

44

40

39

32

32

39

36

33

32

32

32

32

36

98

24

24

19

93

24

OO

21

10

12

Mar.

3 n

3.5

3 5

3.4

3 n

9 Q

3.0

°. 9

3 9

3 9

9 Q

9 ft

9 Q

3 S

4.5

4 2

3

0

4. ft

12

14

7.6

11

7,180

5,370

2,930

2,050

1,200

441

1,360

15

12

13

12

12

12

13

11

10

11

19

12

12

11

8.8

19

1011

12

19

12

12

11

12

8.4

8

0

6.0

6.0

Apr.

641

4.S1

1,960

1,760

3,300

2,620

1,100

326

326

441

721

1,240

791

326

97

381

176

w

47

44

42

42

38

30

26

1,180

9 4J/1

2,860

2,530

6.0

5.5

5.0

5.3

4.5

4.5

4.0

4.0

4.0

4.0

4.0

4.0

3 S

3 ^

3.5

3.4

q r\

9 Q

2

0

2.6

2.4

2

n

1 ft

1.4

1.8

9 co.

99°.

88

May.

1,680

657

481

316

401

1 940

1,000

1,240

429

99ft

369

256

1,260

Qfil

701

344

761

3,700

1 640

1 300

1,360

COQ

OAQ

5,870

11,500

n

enn

9 650

4*850

741

i

June

421

07,4

246

169

lift

106

102

9Q9

721

1,300

1,100

Qftl

ft91

oco

204

OQQ

1,600

7C1

VAA

601

i °,nft

1,740

1,700

1,100

1,180

1,120

Q01

621

901

July.

1 140 '841

801

381

91fi

152

78

66

56

51

44

42

38

36

42

44

39

30

3,900

8,620

5,340

4,590

5,060

5,810

1,120

381

222

152

113

93

i

Aug.

7ft

66

63

CO

51

47

47

47

47

1,380

204

102

66

56

38

30

34

34

1,110

3,500

7,330

2,680

2,480

1,060

401

461

369

169

256

721

274

I

Sept.

199

83

65

57

37

31

-29

26

27

26

19

16

13

10

11

15

13

12

14

18

18

109

113

250

453

214

99

69

54

49

NOTE. Discharge, May 27 and 23,1919, determined from extension of rating curve.
20 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Monthly discharge of Clear Fork of Braws River near Eliasville, Tex., for the period 

Oct. 1, 1918, to Apr. SO, 1920.

Month.

1918-19. 

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

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

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

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

1919-20.

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

The period

Discharge in second-feet.

Maximum.

7,830 

4.390 

4,110 

3,040 

1,190 

7,180 

3,300 

11,500 

1,740 

8,620 

7,330 

453

11,500

2,270 

985 

24 

340 

50 

15 

581

Minimum.

1.6 

15

6.4 

11 

3.2 

2.8 

26 

228 

102 

30 

30 

10

*1.6

23 

6.0 

7.0 

5.5 

12 

6.0 

1.4

Mean.

1,570 

297 

486 

284 

76.8 

666 

870 

2,310 

744 

1,280 

750 

69.1

793

351 

152 

13.7 

52.6 

31.6 

10.9 

41.4

Run-off in 

acre-feet.

96,500 

17,700 

29,900 

17,500 

4,27O 

41,000 

51,800 

142.000 

44,300 

78,700 

46,100 

4,110

574,000

21,600 

9,040 

842 

3,230 

1,820 

670 

2,460

39,700

LITTLE RIVER AT CAMERON, TEX.

LOCATION. 200 feet below city pumping plant, half a mile south of Cameron, Milam 

County, 1 mile above Gulf, Colorado & Santa Fe Railway bridge, 6 miles below 

mouth of San Gabriel River, and 25 miles above confluence with Brazos River.

DRAINAGE AREA. 7,010 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. November 1, 1916, to September 30, 1920.

GAGE. Vertical and inclined staff; three sections attached to trees on left bank a 

short distance below home of pumpman; read by T. H. Crawford or M. H. Hayes.

DISCHARGE MEASUREMENTS. Made from cable at gage or by wading.

CHANNEL AND CONTROL. Bed composed of rock, gravel, and sand; permanent during 

normal flow and free from vegetation. Banks composed of clay and gravel; 

medium height; wooded; subject to overflow only during extreme stages. At a 

stage of 18 feet (discharge, 6,950 second-feet) water begins to enter old channel a 

mile above gage and returns to main channel below the gage; consequently, all 

records of discharge greater than 6,950 second-feet do not represent the total flow 

of the stream, but only that in the main channel. Rock and gravel shoal 100 feet 

below gage serves as control for low and medium stages; subject to change during 

flood stages. During extremely high stages on Brazos River, backwater may 

reach gage.

EXTREMES OF DISCHARGE. Maximum stage recorded .during year ending September 

30, 1919, 30.2 feet at 7 a. m. December 28 (discharge, 13,900 second-feet; see 

"Channel and control" in station description); minimum stage recorded, 1.06 

feet at 7 a. m. October 14 (discharge, 23 second-feet).

Maximum stage recorded during year ending September 30, 1920, 31.6 feet at 

5.50 p. m. January 24 (discharge, 14,700 second-feet; see "Channel and control" 

in station description); minimum stage recorded, 3.20 feet at 6.30 p. m. July 29 

(discharge, 472 second-feet).

1917-1920: Maximum stage recorded in 1920 (see above). Minimum stage, 

0.78 foot at 7 a. m. September 3, 5, and 7, 1918 (discharge, 2.6 second-feet).
BRAZOS RIVER BASIN.

ICE. None reported.

DIVERSIONS. Numerous small diversions are made for irrigation and municipal uses, 

but such diversions have little effect on flow at the station except during extremely 

low stages. Records of the Board of Water Engineers for the State of Texas show 

that about 2,500 acres have been declared irrigated above the station. No diversions of consequence below the station. During time of low flow, water pumped 

by Cameron Power & Light Co., will affect the flow at this station.

REGULATION. Slight effect from pumping for city of Gameron.

ACCURACY. Stage-discharge relation practically permanent for low stages but changes 

during medium and high stages. Extremely high stages of Brazos River may cause 

backwater at this station. Rating curve well defined below 13,000 second-feet. 

Gage read to half-tenths twice daily and oftener during floods. Daily discharge 

ascertained by applying mean daily gage heights to rating table, or by shiftingcontrol method, as shown in footnote to daily-discharge table. Above a stage of 

18 feet (discharge, 6,950 second-feet) water enters an old channel about a mile 

above gage and returns to river below gage. Records published are for main 

channel only. Records good for low and medium stages; fair for high stages.

Discharge measurements of Little River at Cameron, Tex., during the years ending 

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 8 

Dec. 10

1919.

Mar. 27

July 29

Sept. 7

Dec. 27

Made by 

McCashin and Congdon

C.E.Ellsworth........

Gage 

height.

Feet. 

1.18

2.31

22.8

8.14

3.51

8.56

Discharge.

Sec.-ft. 

35.4

238

10,300

2,530

547

2,800

Date.

1920. 

Apr. 2

May 16

18

19

Made by 

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

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

Gage 

height.

Feet. 

7.37

28.66

29.55

21.28

5.79

Discharge.

Sec.-ft. 

2,010

ol3,000

oil. 800

8,210

1,370

Surface velocity observed and coefficient of 1.07 used to reduce to mean velocity.
22 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Little River at Cameron, Tex., for the years ending

Sept. 30, 1919 and 1920.

Day.

1918-19. 

1.......

2.......

 3.......

4.......

5.......

6.......

7.......

8.......

9.......

10. ......

11.......

12.......

13.......

14.......

15.......

16.......

17.......

18.......

19.......

20.......

21.......

22.......

23.......

24.......

25.......

26.......

27.......

28.......

29.......

30.......

31.......

1919-20. 

1.......

2.......

3.......

4.......

5.......

6.......

7.......

8.......

9.......

10.......

11.......

12.......

13.......

14.......

15.......

16.......

17.......

18.......

19.......

20.......

21.......

22.......

93

24.......

25.......

26.......

27.......

28.......

29.......

30.......

31.......

Oct.

401

150

87

65

51

45

40

34

32

27

32

28

26

24

218

120

298

156

84

67

56

117

78

2,110

3,720

2,720

2,760

3,210

2,830

1,840

1,860

1,400

1,200

1,160

1,120

1,080

1,080

2,620

3,470

1,400

1,440

4,280

12,700

14,500

13,800

10,700

10,600

11,800

12,100

10,600

6,650

5,540

7,620

7,880

10,300

10,400"

7,460

6,160

6,210

5,540

5,780

Nov.

1,410

902

731

546

339

223

167

370

5,650

8,730

7,880

6,580

7,820

9,380

10,300

9,440

7,300

3,870

1,820

1,140

747

605

528

466

419

432

463

556

484

534

6,070

5,110

4,970

3,920

3,600

3,060

2,880

2,880

5,020

10,000

12,300

12,300

13,000

12,500

10,700

7,720

4,930

4,330

4,010

3,740

3,560

3,380

3,240

3,160

3,020

3,060

3,340

3,520

3,470

5,730

Dec.

593

636

590

457

398

351

323

292

267

250

233

226

1,770

3,300

3,770

2,300

1,470

636

509

920

2,280

3,190

3,630

10,300

12,700

13,600

9,100

5,040

4,290

4,220

3,930

6,800

6,600

5,630

5,870

5,540

4,790

4,280

4,150

3,880

4,840

4,240

3,830

3,470

3,240

3,110

2,880

2,800

2,800

3,600

5,400

3,560

3,290

2 840

2,750

2,660

2,570

2,480

2,400

2,350

2,260

Jan.

3,160

1,910

1,340

1,140

1,020

909

804

753

737

674

643

612

565

534

550

3,540

3,540

2,220

2,100

2,440

2,640

6,500

13,100

13,300

10,400

7 030

5,680

5,870

5,920

5,090

4,260

2,220

2,180

2,100

2,060

2,400

6,400

7,260

8,140

8,090

5,830

4,650

9,160

13,400

14,000

13,100

10,800

8,350

7,620

6,700

5,680

5,350

5,110

& 77rt

14 400

U 4flfi

6,450

5,870

5,680

5,160

4,970

Feb.

4,060

4,220

7,980

6,980

4,700

4,010

3,830

3,450

3,450

3,520

2,930

2,290

2 060

1^870

1,720

1,560

1,930

4,720

3,760

6,210

2

Qfin

2,350

2 ftfiA

1,910

1,820

1,700

1,620

4 74n

4,560

4

QQA

4 240

4*010

q QOfi

3,880

3,740

S fi^ft

3,560

3,470

q finn

4,280

4 790

4' 330

3

7jn

3,470

3

OQfi

3,290

2,980

2

QOA

2,800

2 7ftfi

2

C7A

2 4. SH

2,400

2,400

Mar.

1,540

1,460

1,420

1,380

1,360

1,400

1,640

1,400

1,420

1,700

1,540

1,320

1,220

1,160

1,120

1,120

1,260

1,870

1 Cftfl

1,180

1 040

QQA

927

QQ1

1 7441

9 240

9

9/IA

5,990

4,470 4 94n

4r 540

2,350

2,310

2,660

2

7KA

2,220

2,060

1,970

1,930

1,930

1,970

1,970

1,890

1 840

1^720

1,720

1,720

1,720

1,680

1,640

1,600

1,600

1,560

1,520

1 600

2,880

2,480

2,010

1,890

2,060

Apr.

5,000

4,330

3,830

5,110

4,310

3,290

3,000

3,360

2,860

2,120

2,080

2,010

1,700

1,540

1,440

1,320

1,220

1 i4n

1,080

1,040

984

927

891

821

7fiQ

721

721

737

3,180

2,140

2,060

1,760

1,640

1,520

1,440

1,400

1,400

1,400

1,360

1,360

1,280

1,240

1,200

1,160

1,160

1,120

1,120

1,120

1,120

1,080

1,000

1 '965 000

965

1,000

1,000

1,000

965

965

May.

7,230

6,920

4,740

2,950

1,560

1,480

3,780

4,900

5,610

3,380

2,680

3,380

5,490

4,280

2,500

2,200

1,740

2,950

3,940

3,600

5,950

6,140

4,970

6,140

7,820

5,590

6,210

5,470

2,700

1,840

1,560

965

927

891

891

855

855

821

1,520

3,290

3,020

3,060

1,800

1,440

2,180

5,210

11,700

14,300

13, 500

7,770

4,650

4,560

4,010

2,700

2,660

3,060

2,800

2,140

1,890

1,680

1,560

1,400

June.

1,380

1,240

1,380

1,930

1,580

1,180

1,020

950

909

1,080

2,930

4,310

2,370

1,400

1,300

3,580

7,640

12,800

12,100

4,740

7,410

7,080

5,370

4,610

5,470

10 000

12^000

13,500

13,600

11,600

1,480

1,400

1,240

4 nfin

4 3sn

2,440

3,780

2,480

1,760

1,560

1,240

1,160

1,080

1,000

965

927

927

1 200

2,100

3,020

4,560

2,570

1,890

2,140

2,140

1,890

1,640

1,600

1,800

1,760

July.

11,100

9,740

6,090

4,100

3,270

2,910

2,840

4,720

9,130

7,180

3,380

2,310

2,030

1,800

1,660

1,560

1,620

1 460

1

QOA

1 740

2 060

3,700

s fwn

8,860

5,350

4,120

3,130

2,480

2,420

2,180

1,780

1,970

2,010

1 640

1*940

1,440

3,380

1,600

1,000

927

787

787

1,760

2,010

1,480

1,520

1,440

965

787

753

721

658

658

658

658

658

565

534

503

472

658

596

Aug.

1,520

1,320

1,200

1,100

1,020

927

891

838

821

804

1,140

1,040

821

737

791

674

643

674

Q97

1,780

2,910

3,270

5 440

3,810

3

(\Af\

4,150

3,060

2,460

1,780

1,340

627

596

565

658

658

721

2,480

10,800

13,900

13,000

7,200

2,570

2,260

2,800

2,010

1,970

2,750

3,110

3,110

2,660

2,480

2,480

1,840

1,680

1,360

2,060

2,570

1,840

1,680

1,600

1,520

Sept.

1,020

838

787

737

689

643

581

565

537

525

506

AM

472

444

447

2 060

1,800

1,360

770

633

731

3,060

7,750

12,200

12,100

7,510

3,060

2,030

2,080

1,700

1,720

1,560

2,010

2,180

1,600

1,240

1,280

5,830

8,890

10,000

8,780

6,310

4,150

2,980

3,160

3,600

3,700

3,020

1,840

1,520

1,280

1,120

1,080

927

891

855

787

753

753

787

NOTE. Indirect method for shifting control used Oct. 1 to Nov. 8 and Nov. 19 to Dec. 23, 1918; Feb. 1 

to May 22 and Aug. 12 to Sept. 30,1920. See "Accuracy."
COLORADO RIVER BASIN. 23

Monthly discharge of Little River at Cameron, Tex., for the years ending Sept. 30, 1919

Month.

1918-19. 

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

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

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

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

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

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

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

1919-20.

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

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

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

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

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

Discharge in second-feet.

Maximum.

3,720 

10,300 

13,600 

13,300 

7,980 

9,240 

5,110 

7,820 

13,600 

11,100 

5,440 

12,200

13,600

14,500 

13,000 

6,800 

14,400 

4,790 

2,880 

2,140 

14,300 

4,560 

3,380 

13,900 

10,000

14,500

m ... 

Minimum.

24 

167 

226 

534 

1,560 

891 

721 

1,560 

909 

1,460 

643 

444

24

1,080 

2,880 

2,260 

2,060 

2,400 

1,520 

965 

821 

927 

472 

565 

753

472

Mean.

751 

2,990 

2,950 

3,520 

3,410 

2,300 

2,080 

4,180 

5,220 

4,020 

1,660 

2,270

2,940

6,660 

5,620 

3,800 

7,380 

3,550 

1,990 

1,260 

3,490 

2,010 

1,120 

3,080 

2,820

3,570

Run-off in 

acre-feet.

46,200 

178,000 

181,000 

216,000 

189,000 

141,000 

124,000 

257,000 

311,000 

247,000 

102,000 

135,000

2,130,000

410,000 

334, 000 

234,000 

454,000 

204,000 

122,000 

75,000 

215,000 

120,000 

68,900 

189,000 

168,000

2,590,000

NOTE. The above table shows the discharge in main channel only. See "Accuracy" in station 

description.

COLORADO RIVER BASIN. 

COLORADO RIVER NEAR BRONTE, TEX.

LOCATION. At wagon bridge 400 feet below Kansas City, Mexico & Orient Railroad bridge, 1J miles above mouth of Kickapoo Creek and below mouth of Live 

Oak Creek, and 2£ miles south of Bronte, Coke County.

DRAINAGE AREA. 5,550 square miles (measured on standard topographic maps; postroute map; and topographic map of Texas, compiled in 1899 by Robert T. Hill, 

of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. September 19, 1915, to September 30, 1920.

GAGE. Chain gage attached to downstream side of bridge near left bank. Read by 

J. E. Gay, Mrs. D. S. McAuley, Dick Walden, Mrs. W. 0. Kissee, and Miss Irene 

Walden. Vertical staff attached to left bent of railroad bridge 400 feet above 

present site and referred to same datum was used from September 19 to October 

29, 1915.

DISCHARGE MEASUREMENTS. Made from downstream side of bridge or by wading.

CHANNEL AND CONTROL. Bed composed of a clay hardpan with gravel; shifts. Channel straight about 500 feet above and below station. Right bank wooded, sloping, 

and subject to overflow at extreme stages; left bank high, clean, and not likely to 

overflow. Control probably at shoal 300 feet below gage; shifts.

EXTREMES OF STAGE. Maximum stage recorded during year ending September 30, 

1919, 16.6 feet at 5.30 p. m. July 20; no flow during several periods in October and 

November.

Maximum stage recorded during year ending September 30, 1920, 17.1 feet at 

8.30 a. m. October 6; minimum stage, 2.94 feet May 4 and 5.

1915-1920: Maximum stage recorded in 1920 (see above); no flow during periods 

throughout the record.
24 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

ICE. No ice reported during year.

DIVERSIONS. Some water is diverted for irrigating small areas in Coke and Mitchell 

counties and for municipal use by the city of Robert Lee. No large irrigation 

projects developed in drainage basin above station. Records of the Board of 

Water Engineers for the State of Texas show that about 1,700 acres have been 

declared irrigated above the station.

REGULATION. None.

ACCURACY. Stage-discharge relation not permanent. Rating curve not developed. 

Gage read to hundredths twice daily prior to January 6, 1919, and once daily after 

that date. Discharge not determined.

Discharge measurements of Colorado River near Bronte, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 8

1919.

May 15

Nov. 14

Dec. 12

Made by 

D. A. Dudley..........

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

Gage 

height.

Ft.

1.52

1.92

2.70

4.10

3.72

Discharge.

Sec. -ft. 

0

5.7

60.6

51.0

93.8

27.4

Date.

1920.

Mar. 10

22

May 26

Aug. 2

Made by 

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

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

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

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

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

Gage 

height.

Ft. 

3.78

3.42

3.21

3.09

3.98

4.21

3.43

Discharge.

Sec.-ft. 

29.9- 8.0-

2.0

«.5.

82.7

107

«2.0

Estimated.

Daily gage height, in feet, of Colorado River near Bronte, Tex., for the years ending Sept.

30, 1J19 and 1920.

Day.

1918-19. 

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

2.............. 

3....:.........

4..............

5..............

6.............. 

7... ...........

8..............

9..............

10..............

11..............

12..............

13..............

15..............

16..............

17..............

18..............

19.............. 

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

«

1 80

7.70

6.10

3.70

2.90

2.47

2.20

1.95

1.75

7.75

12.70

8.10

6.05

4.20 

7.30

10.55

10.48

4.50

3.35

2. 85

Nov.

2.55

2.25 

2.08

1.95

3.55

3.15

1.80

3.55

2.00

1.50

1.80

1.34

1.50

1.45

Dec.

1.40

1.42 

1.42

1.38

1.30

1.23 

1.21

1.20

1 00

.98

.96

Qfi

.94

.94

.93

.94

.92 

2.75 

3.00

2.25

2.31

2.46

O QC

2.00 

1.70

1.64

1.60

1.50

1.29

1.28

Jan.

1.27

1.25 

1.25

1.24

1.23

1 V)

1 CO

1 49

1.54

1.57

1 CO

"i."55" 

1.52

1.52

1.92

1.64

1.58 

1.59

1.70

1.52

Feb.

1.52

1.54

1.52

1.51 

1.52

1 PL9

1.52

1 V)

1 f^O

1 49

1.48

1.47

1.42

1 34

1.35 

1.34 

1.34

1.30

1.28

1.27

1.27

1.28 

1.28

1.26

1.23

i 

Mar.

1.23

1.23 

1.22

1.22

1.21

1.21 

1.20

1 Q7

1 Q*

2.52

2.23

2 04

1 QR

1.74

1.72

i fi.1

1.65 

1.64 

1.50

1.48

1.50

1.52

14.14

5.10

3.32

3.60

5.00

Apr.

6.10

C CA

4.40 

2 96

3. 16

8.20

5.00

4

0A

2.38

"

......

......|

3.50

May.

2.94

2.48 

2.30

2.40 

2.90

2.38

2.48

2.72

2.18

2.00

1.96

2.63

2.03

2.63 "2~6i"

1.73

1.71

1.73

1.97 

1.83

1.79

1.79

1.73

1.71

June.

7.09

5.39 

2.89

2.79

2.39

2.12 

3.48

7.68

11.28

15.38

4.78

2.62

3.30

9.98

I'l. 18

7.68

5.08 

6.58 

8.18

6.18

10.08

6.78

4.18

3.67

4.27

3.27

3.09

July.

2.57 

2.41

2.41

5.67

3.57

3.17

2.77

2.65

"ie.'oe"

15.98

6.66

4.56

3.76 

3.46

3.20

3.14

2.94

Aug.

2.84

2.86

2.72

2.68 

"2." 66"

2.56

2.46

2.50

2.50

2.52

2.50

2.48

2.34

2.24

2.38 

2.38

2.28

2.38

2.38

3.56

12.86 

13.66

6.26

4.36

3.76

3.56

Sept.

3.10

3.09 

3.41

3.45

3.01 

2.91

3.15

2.93

2.83

3.35 

3.45 

4.75

4.55

6.45

4.15

3.85

3.35 

3.15

2.97

2.81

2.67

2.61
COLORADO RIVER BASIN. 25

Daily gage height, injeet, of Colorado River near Bronte, Tex.,for the years ending Sept. 

30, 1919 and 1920 Continued.

Day.

1919-20. 

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

2..............

3..............

 4..............

5.... ..........

...............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20.............. 

21..............

22..............

23..............

^A... ...........

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

2.%

2.92

2.78

2.82

2.96

17.04

8.24

4 84

4.14

4 74

4.94

4.84

4.54

4.24

4.24

3.74

3.44

454

4.34

4.14 

4.14

4.74

3.14

2

QA

2.94

2.94

2.24

12.54

14.74

5.54

Nov.

5.24

4.84

4.34

3.84

3.54

3.94

4.84

4.14

4.84

4.54

4.00

4.10

4.10

4.00

3.90

3.90

3.80

3.90

3.90

3.90

3.90

S

on

4.00

410

4.10

4 10

Dec.

400

3.90

3.90

3.90

3.80

3.80

3.70

3.70

3.70

3.75

q 7/\

3.70

3.70

3.60 

3.70

3.60

q eft

3.60

3.60

3.65

3.65

i fin

3.62

Jan.

3.65

3.65

3.65

3.60

3.85

3.64

3.66

3 74

3.72

3.68

3.82

3.84

3.82

3.82

q QC

3.80

3.80

3.80

3.90

3.84

3.82

3.80

1 71

3.70

3.70

3.70

3.65

3.68

3 60

Feb.

3.60

3.68

3.60

3.55

3.55

i 11

i 11

3.60

3.60

3 fin

3.60

3.55

3 11

3.55

3.50

3.45

3 4A

3.48

3.48

3.48

3.48

3.40

Mar.

3.40

1 49

3 40

3.40

1 4A

3 40

3 40

3.40

3.40

3 40

3.40

3 40

3.20

3.24

3.32

3

qo

3.32

3

<49

3.30

3.32 

3.30

3.28

3.28

3.26

q 10

3.18

3.18

3.16

3.16

3.14

3 1C

Apr.

3.22

3.16

3.14

3.22

3.18

3.14

3 14

3.12

3.16

3.14

3.14

3.14

3.12

3.06

3.06

3.06

3.06

3.06

3.04 

3.04

3.02

3.06

3.08

3 no

3.06

3.06

3.08

3.08

3.02

May.

3.02

3.02

3.02

2.94

2.94

3 04

3.02

A QA

4.20

4.90

8.20

6.20

5.20

4.20

3.70

13.40

11.90

5.10

4.40

4.10 

4.00

3.90

4.10

400

4 00

4.00

4.00

3.90

3.90

3.90

S on

June.

3.80

4.10

4.10

4.70

4.40

4.40

4 40

4.00

4 00

4.00

3.90

3.91

3.91

3.91

4 11

4.61

4.61

3.91

5.41 

5.21

4.91

4.81

4.91

4.71

4.41

4.16

4.11

3.81

July.

3.82

3.72

3.72

3.62

3.62

3.52

3.62

3.62

3.62

3.62

3.42

3.42

3.34

3.34

3.34

3.35

3.35

3.35 

3.93

3.73

3.53

3.43

3.33

3.43

3.33

3.33

3.63

3.53

Aug.

3.40

3.32

3.40

3.80

6.90

4.30

3.90

3.80

3.80

3.80

4.30

5.60

4.60

5.00

10.40

13.30

13.40

16.35 

5.90

5.50

14.50

13.70

5.50

5.30

9.30

7.20

5.60

5.30

Sept.

4.80

4.70

4.70

4.90

11.10

11.40

5.50

5.20

4.90

4.90

4.80

4.70

5.00

4.90

4.70

4.60

4.50

4.50 

4.40

4.40

4.40

4.40

4.30

4.30

4.30

4.30

4.30

4.30

NOTE. Oct. 1 to Nov. 16,1918, point of zero flow was at gage height 1.7 feet; after Nov. 16. point of zero 

flow not known except that it was below 0.92 foot. Change probably occurred during period, Nov. 17-26, 

1918. No flow, Oct. 1-6,18-20, Nov. 5-6,11-13, and 17-26,1918. No record for days of missing gage heights 

except for days of no flow during year ending September 30, 1919.

COLORADO RIVER AT BALLINGER, TEX.

LOCATION. At Hutching Avenue highway bridge, 800 feet below Gulf, Colorado & 

Santa Fe Railway bridge in Ballinger, Runnels County, 1 mile above mouth of 

Elm Creek.

DRAINAGE AREA. 6,460 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. December 11, 1915, to September 30, 1920. Records of stage 

have been obtained by the United States Weather Bureau since July 1, 1903; 

current-meter measurements were begun May 29, 1915.

GAGE. Chain gage attached to downstream handrail of bridge; read by A. J. Voelkel.

DISCHARGE MEASUREMENTS. Made from downstream side of bridge or by wading.

CHANNEL AND CONTROL. Banks consist of clay and gravel; medium height and 

wooded; subject to overflow at extremely high stages. Bed composed of hard 

clay, sand, and gravel; shifting. Control is shoal 1,000 feet below gage; shifts.

ICE. None reported during year.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 18.50 feet, at 7.30 a. m., July 21 (discharge not determined); no flow 

October 2-8.

Maximum stage recorded during year ending September 30, 1920, 16.50 feet 

at 7.30 a. m. October 7 (discharge, 20,700 second-feet, determined from extension of rating curve); no flow April 29 to May 6; July 16-22 and 28-29.

1916-1920: "Maximum stage recorded, 18.50 feet at 7.30 a. m. July 21, 1919 

(discharge not determined); no flow during several periods.
26 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

DIVERSIONS. During low stages a large part of the flow is diverted a few miles above 

the station for irrigation. Records of the Board of Water Engineers for State of 

Texas show that about 6,900 acres have been declared irrigated above station.

REGULATION. None.

ACCURACY. Stage-discharge relation not permanent. Rating curve fairly well 

denned below 12,000 second-feet. Gage read to hundredths twice daily. Daily 

discharge determined by applying mean daily gage height to rating table or by 

indirect method for shifting control as noted in footnote to daily-discharge table.' 

Records above 12,000 second-feet determined from extension of rating curve 

and subject to error. Records below 12,000 second-feet good.

Discharge measurements of Colorado River at Ballinqer, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 5

1919. 

Jan. 10

May 14

17

18

18

19

Aug. 6

Nov. 13

Made by 

C. E.Ellsworth........

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

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

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

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

D. A. Dudley..........

Gage 

height.

Feet.

0

01

.70

1.15

7.96

7.10

4.67

3.89

3 OQ

.93

Discharge.

Sec.-ft. 

0

9.0

136

6,940

6,060

2,740

1,910

1,300

105

Date.

1919. 

'HOA is

1920. 

Jan. 17

Mar. 11

May 26

Aug. 24

Sept. 7

Made by 

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

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

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

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

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

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

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

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

Gage 

height.

Feet. 

0.68

.76

.54

.42

.90

.78

14.78

10.76

9.72

Discharge.

Scc.-ft. 

44.6

57.1

23.8

6.94

118

77.1

016,000

611,500

6 10,400

a Probably in error. Not used to define rating curve.

6 Surface velocities observed and coefficient of 1.05 used to reduce to mean velocity.

Daily discharge, in second-feet, of Colorado River at Ballinger, Tex., for the years

Sept. 30, 1919 and 1920.'

Day.

1918-

19.

1...

2...

3...

4...

5...

6...

7...

8...

9...

10...

11...

12...

13...

14...

15...

16...

17...

18...

19...

20...

21...

22...

23...

24...

25...

26...

27...

28...

29...

30...

31...

Oct.

0.5

0

0

0

0

0

0

0

15

5,910

4,600

888

212

164

117

68

33

19

17

12

1,830

12,700

8,170

3,150

1,620

2,400

14, 100

14,900

1,750

734

430

Nov.

225

176

130

104

86

68

4,980

1,660

713

168

92

61

46

37

39

37

27

21

16

13

12

13

10

10

11

18

22

22

19

17

Dec.

13

10

9.2

10

9.2

9.2

8.6

9.2

8.6

8.0

8.0

8.0

10

9.8

8.6

8.0

8.0

8.0

9.8

98

101

41

1,130

229

63

31

19

18

12

11

12

Jan.

12

12

15

15

15

11

10

10

10

9.2

9.2

9.2

9.2

9.2

10

12

15

15

16

11

10

17

71

31

17

11

10

10

12

12

12

Feb.

13

12

10

9.8

8.0

7.4

6.2

5.6

5.6

5.6

5.6

5.6

4.4

4.1

4.1

4.1

4.1

4.1

4.4

4.7

4.7

4.7

4.7

4.7 4.1'

3.5

2.9

2.3

.......

Mar.

2.3

2.3

2.3

2.3

2.3

1.9

1.9

1.9

10

53

114

71

46

26

18

13

12

9.8

8.0

8.0

6.8

7.4

8.6

9,680

12, 100

8,700

1,640

662

399

331

2(55

Apr.

1,680

925

3,700

1,930

985

514

410

239

188

2,100

2,780 i.oea

648

344

209

166

129

123

112

104

91

87

82

80

75

76

131

138

108

100

May.

367

257

163

141

10,600

339

479

432

296

200

473

537

229

131

194

399

160

125

200

143

106

82

70

5,530

456

148

106

80

63

57

53

June.

1,160

2.030

903

410

215

136

219

212

5,760

15,200

14,900

6,540

1,180

544

280

11,400

9,070

2,550

2,070

2,950

2,980

4,550

6,080

1,540

1,020

479

1,160

1,140

620

1,040

July.

518 197

133

136

143

102

102

84

75

1,070

1,080

531

300

182

112

87

76

66

197

13,400

23,400

20,000

2,110

1,120

683

432

296

229

206

177

150

Aug.

131

123

114

100

89

78

71

69

66

64

63

59

53

47

40

40

46

43

41

41

41

54

798

305

158

13,900

9,580

2,470

970

505

313

Sept.

250

206

160

138

125

116

106

97

89

89

76

71

68

63

93

4,420

1,770

3,250

746

697

5,770

7,380

2,540

843

410

273

219

158

136

121
COLORADO RIVER BASIN. 27

Daily discharge, in second-feet, of Colorado River at Ballinger, Tex.,for the years ending 

Sept. SO, 1919 and 1920 Continued.

Day.

1919-

20.

1...

2...

3...

4...

5...

6...

7...

8...

9...

10...

11...

12...

13...

14...

15...

16...

17...

18...

19...

20...

21...

22...

23...

24...

25...

26...

27...

28...

29...

30...

31...

Oct.

107

243

158

132

100

5,840

18,300

4,200

1,560

1,220

985

1,100

1,100

910

518

300

276

485

1,140

485

321

2,590

377

209

152

125

116

109

112

12,200

5,420

Nov.

1,260

910

518

321

236

197

179

197

148

142

140

138

107

103

98

98

98

92

92

87

83

79

79

75

75

75

75

78

82

85

Dec.

85

77

71

69

67

67

61

54

54

51

47

45

49

49

45

45

47

49

49

49

45

49

47

45

49

45

42

38

38

37

35

Jan.

33

32

30

33

42

47

47

47

44

44

63

67

65

54

54

52

51

54

52

49

52

58

61

61

60

56

52

51

49

47

47

Feb.

44

47

45

42

40

40

42

44

42

54

51

49

47

44

40

40

40

40

37

35

33

33

33

33

32

30

27

27

27

Mar.

24

24

24

24

24

24

24

24

24

22

22

22

20

19

19

19

19

19

17

19

16

16

16

16

16

16

16

15

12

12

1^

1

Apr.

12

12

13

11

7.6

7.6

9.7

12

14

13

14

9.7

7.6

5.5

6.6

8.6

6.6

5.5

5.0

4.5

4.1

3.7

3.2

1.0

.4

.9

.3

.2

0

0

May.

0

0

0

0

0

0

1,720

485

334

3,460

3,460

4,200

2,090

725

426

6,260

13,200

2,090

910

485

292

212

168

160

140

114

100

89

85

77

71

June.

63

85

107

98

177

348

226

152

121

85

73

60

58

52

47

52

317

166

125

138

985

485

236

304

226

239

194

135

94

71

July.

49

42

30

29

26

' 26

13

9.7

7.6

11

11

7.6

5.0

6.6

3.2

0

0

0

0

0

0

0

37

7.6

5.5

3.7

.6

0

0

1.9

11

Aug.

1.9

3.2

79

45

19

49

254

51

20

9.7

4.2

948

948

426

485

456

7,770

12,100

12,500

14,500

9,180

1,640

8,860

16,900

5,140

1,820

1,560

2,390

3,460

2,000

1,100

Sept.

1,060

550

394

261

473

5,280

12,200

3,580

2,000

872

518

321

239

177

185

250

182

130

135

121

112

103

94

87

77

73

71

71

69

61

NOTE. Indirect method for shifting control used Oct. 1,1918, to Mar. 24,1919, May 6-23, July 23 to Aug. 

25, Aug. 28 to Dec. 31,1919; May 17 to July 14 and Aug. 18 to Sept. 30, 1920. Discharge on following 

days determined from extension of rating curve and subject to considerable error: Oct. 22, 23, 27, 28, 

1918; Mar. 24-26, May 5, June 10, 11,16, 17, July 20-22, Aug. 25 and 26,1919.

Monthly discharge of Colorado River at Ballinger, Tex., for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

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

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

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

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

1919-20.

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

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

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

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

Discharge in second-feet.

Maximum.

14,900 

4,980 

1.130 

71 

13 

12,100 

3,700 

10,600 

15, 200 

23,400 

13,900 

7,380

23,400

18,300 

1,260 

85 

67 

54 

24 

14 

13,200 

985 

49 

16,900 

12,200

18,300

Minimum.

0 

10 

8.0 

9.2 

2.3 

1.9 

75 

53 

136 

66 

40 

63

0

100 

75 

35 

30 

27 

12 

0 

0 

47 

0 

1.9 

61

0

Mean.

2,380 

295 

62.5 

14.5 

5.71 

1,100 

645 

730 

3,280 

2,170 

983 

1,020

1,060

1,970 

198 

51.6 

50.1 

39.2 

19.3 

6.64 

1,330 

184 

11.1 

3,380 

992

693

Run-off in 

acre-feet.

146,000 

17,600 

3,840 

892 

317 

67,600 

38,400 

44,900 

195,000 

133,000 

60,400 

60,700

769,000

121,000 

11, 800 

3,170 

3,080 

2,250 

1,190 

395 

81,800 

10,900 

682 

208,000 

59,000

503,000
28 SURFACE WATER SUPPLY, 1919-1020, PART VIII: 

COLORADO RIVER NEAR CHAD WICK, TEX.

LOCATION. At Gulf, Colorado & Santa Fe Railway bridge half a mile below Chadwick 

dam, 1 mile above mouth of Elliott Creek, 2 miles west of Chadwick, on line 

between San Saba and Lampasas counties, 2J miles below mouth of San Saba 

River.

DRAINAGE AREA. 26,400 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of the United States Geological Survey; scale, 1 inch =25 miles). 

RECORDS AVAILABLE. October 21, 1915, to September 30, 1920.

GAGE. Vertical and inclined staff, in 4 sections, on right bank 75 feet upstream from 

railway bridge. A high-water section is painted on second concrete pier from 

left abutment of railway bridge; read by A. G. Walker. Prior to April 1, 1920, 

inclined staff in 3 sections, attached to rock ledge on left bank 75 feet upstream from 

railway bridge; a high-water section painted on left face of left bridge pier; a 

vertical staff on right bank directly opposite inclined gage used during low water. 

From April 1 to June 4, 1920, gage was temporarily located 50 feet below the 

bridge. All gages referred to same datum.

DISCHARGE MEASUREMENTS. Made either by wading or from railroad bridge at gage, 

or from Red Bluff highway bridge, 2£ miles below gage.

CHANNEL AND CONTROL. Bed composed of rock and gravel; shifts slightly, owing to 

movement of gravel. Channel .straight above and below station for 1,000 feet. 

Left bank high, rocky, wooded, and not subject to overflow; right bank medium 

in height, wooded, composed of clay and gravel, and subject to overflow during 

extreme stages. Position of control not known, but current-meter measurements 

indicate that it shifts, affecting stage-discharge relation at low stages.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 41.35 feet at 9.20 a. m. November 10 (discharge, 77,100 second-feet); 

minimum stage, 0.56 foot on October 4, 8, and 9 (discharge, 29 second-feet).

Maximum stage recorded during year ending September 30,1920, 21.4 feet at 

9.45 a. m. September 8 (discharge, 25,000 second-feet); minimum stage 1.38 feet 

at 5.10 p. m. August 3, and 6.15 p. m. August 5 (discharge, 258 second-feet).

1916-1920: Maximum stage recorded, 41.35 feet at 9.20 a. m. November 10, 

1919 (discharge, 77,100 second-feet); minimum stage, 0.16 foot August 22 and 23, 

1918 (discharge, 1.5 second-feet).

ICE. None reported during year.

DIVERSIONS. No large irrigation works have been completed in the drainage basin 

above station, but tracts ranging in size from 5 to 1,500 acres adjacent to the main 

river and tributaries are irrigated by diversion. A large part of the irrigated area 

is in Runnels, Brown, and Mills counties and along Concho and San Saba rivers. 

Several small dams have been constructed in the drainage basin above station. 

Chadwick dam, half a mile above, creates a small pond and serves only to divert 

to a water wheel that has not been operated for some time. Records of the Board 

of Water Engineers for the State of Texas show that about 30,000 acres have been 

declared irrigated above the station.

REGULATION. None of consequence except possibly during extremely low stages.

ACCURACY. Stage-discharge relation not permanent for low stages, owing to deposit 

of sand and gravel on control, but not seriously affected during medium and 

high stages. Rating curve well denned below 80,000 second-feet. Gage ordinarily read daily to hundredths during low and medium stages and to tenths 

during high stages. One reading a day may not be true index to discharge, 

owing to rapid fluctuations. Daily discharge determined by applying mean 

daily gage height to rating table, by indirect method for shifting control, or on 

days of no record, by interpolation or estimation, as noted in footnote to dailydischarge table. Records fair.
COLORADO EIVER BASIN. 29

Discharge measurements of Colorado River near Chadwixk, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 13

Nov. 9

10

11

11

1919.

Jan. 13

22

23

Made by 

E. P. Congdon.. .......

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

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

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

Gage 

height.

Ft.

17.20

35.6

41.3

31.5

27.1

1.58

12.20

17.79

Dis. 

charge.

3ec.-ft. 

"17,900

658,000

676,900

6 45 200

634*400

219

010,600

019,600

Date.

1919. 

May 22

A HP1 Q

Nov. 3

1920.

Mar. 3

Apr. 26

July 13

Made by 

D. A. Dudley..........

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

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

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

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

Gage 

height.

Ft.

4.00

2.40

6.00

2.82

1.78

2.82

1.66

Discharge.

Sec.-ft. 

1,320

375

2,880

615

296

708

351

o Surface velocity observed and coefficient of 0.90 used to reduce to mean velocity, 

ft Surface velocity observed and coefficient of 1.00 used to reduce to mean velocity.

Daily discharge, in second-feet, of Colorado River near Chadwick, Tex., for the years ending

Sept. 30, 1919 and 1920.

Day.

1918-19.

1.....

2.....

3.....

4.....

5.....

6.....

7.....

8.....

9.....

10.....

11.....

12.....

13.....

14.....

15.....

16.....

17.....

18.....

19.....

20.....

21.....

22.....

23.....

24.....

25.....

26.....

27.....

28.....

29.....

30. ....

31.....

Oct.

45

45

31

29

33

31

31

29

29

335

14,200

18,900

17. 300

9,690

2,080

900

669

430

283

185

220

2,760

15,700

23,000

15,700

3,810

2,330

2,000

14,200

9,850

3.050

Nov.

1,250

900

615

458

395

335

1.740

23,000

56,100

74,100

37,500

2.440

1.250

900

1,840

1,250

335

277

277

225

225

200

200

225

200

305

705

615

365

335

Dec.

277

277

225

225

200

175

175

175

175

175

155

155

200

200

155

115

75

75

1,000

3,230

1,180

900

18,000

9,990

1,840

1,250

1,120

850

705

585

465

Jan.

225

175

155

135

135

95

79

75

75

66

60

95

95

175

155

250

395

750

705

638

750

9,850

19,100

16,100

3,050

1,530

2,580

6,340

2,000"

1,120

705

Feb.

633

705

9,570

2,000

1,150

928

705

615

543

465

423

305

288

129

127

127

131

133

133

129

127

127

131

131

129

127

127

125

Mar.

123

123

123

121

121

123

125

125

200

200

195

190

190

185

185

225

230

225

220

225

220

220

220

4,320

12,000

19,900

22, 800

12,400

2,870

3,050

3.140

Apr.

3,230

2,000

1.680

1,250

7,220

3,610

2,330

1,840

950

1,000

4,650

4,010

2.960

2,690

2,000

705

615

465

395

365

335

311

291

277

277

230

205

175

500

2,420

May.

1.660

900

615

430

1,120

3,140

8,260

3,230

1,620

1,000

1,120

3,610

2,580

1,540

1,460

1,390

9,850

2,240

5,450

3,160

2,460

1,250

1,120

900

5,540

1,700

840

633

June.

500

395

2,440

1,460

1,000

800

705

551

1,840

10, 100

20,500

27.900

29,300

5,090

2,160

1,620

2,000

13,200

12,700

4,650

12,600

7,480

10,600

13,400

10,100

16,100

13,500

10,400

9,170

8,260

July.

4,650

3,810

2,330

1,530

1,250

820

870

615

500

6,580

3,250

1,840

820

705

660

615

705

615

535

4,870

36,600

27,800

22,100

20,900

9,170

6,960

4,210

3,250

1,870

810

705

Aug.

633

395

430

335

320

283

225

200

200

200

200

195

335

395

9,170

12,700

8,460

4,210

3,810

6,530

9,850

13,300

9,300

3,050

2.190

Sept.

1,000

615

465

335

615

705

535

335

311

277

230

188

175

175

705

950

8,000

3,320

3,810

4,210

10,300

16,400

33,200

20,200

15,700

13,500

9,170

7,350

6,000

5,310

10272S 22 WSP 508 3
30 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Colorado River near Chadwick, Tex. ,for the years ending 

Sept. 30, 1919 and 1920 Continued.

Day.

1919-20. 

1.....

2.....

3.....

4.....

5.....

6.....

7.....

8.....

9.....

10.....

11.....

12.....

13.....

14.....

15.....

16.....

17.....

18.....

19.....

20.....

21.....

22. ....

23.....

24.....

25. ....

26. ....

27.....

28. ....

29.....

30.....

31.....

Oct. Nov.

2,870

Dec.

900

705

705

2,510

2,000

1,180

705

705

682

682

901

1,120

800

705

705

638

638

638

638

638

595

595

595

595

Jan.

482

448

448

380

412

350

518

589

660

950

4,650

7,220

3,710

2,510

1,250

1,120

800

Qcft

1,000

1,000

900

900

850

800

705

705

682

682

660

Feb.

800

1,180

1,680

1,250

800

800

705

682

660

660

638

638

638

fil ^

412

350

Ocn

ocn

335

qcft

335

520

705

682

682

575

482

,4 on

476

Mar.

522

568

615

800

638

575

395

335

Apr.

430

412

412

365

365

350

350

350

335

320

320

320

320

320

320

320

305

305

305

ini

305

305

305

305

291

291

291

291

291

291

May.

291

277

277

274

272

277

2,960

14,200

6,000

12,700

12,100

14,400

16,700

6,700

7,740

8,780

6,340

5,660

4,870

3,050

1,460

1,360

1,250

1,120

1,120

1,000

1,000

900

535

500

465

June.

412

412

638

535

575

465

335

335

320

305

311

305

305

299

294

294

294

294

412

606

800

500

775

2,960

2,280

1,600

1,460

1,180

850

500

July.

396

291

285

285

283

285

285

283

280

448

392

365

332

326

314

299

272

273

274

272

269

269

266

266

274

272

266

266

264

311

283

Aug.

274

264

258

258

258

261

728

728

682

595

448

359

326

470

615

1,390

4,010

8,130

9,370

10,600

8,520

8,390

6,120

5,660

5,200

4,870

4,210

4,110

3,910

3,140

3,140

Sept.

2,960

2,870

2,780

2,420

1 3,000

1

24,700

23,600

8,520

7,610

3,71D

2,160

1,680

1,320

1,060

800

775

638

615

595

595

555

445

335

335

335

32D

320

302:

NOTE. Discharge interpolated Oct. 14, Dec. 30, 1918, Feb. 6, Mar. 31, May 1, 13, 15, July 15, Aug. 23, 

Sept. 21, Dec. 18, and 26,1919; Jan. 8, Feb. 22,29, Mar. 1, 2, Apr. 11, 23, May 15, 22, 30, June 20, 25, July 1, 

18, Aug. 4, 14, 19, 24, Sept. 2, 16, and 24, 1920.

Discharge estimated: Dec. 18, 1918; Mar. 23, Apr. 10, May 25-27 (10,000 second-feet), Aug. 3-8 (350 

second-feet', Sept. 17, 1919; and Sept. 5-7,1920. No record for periods not recorded. Discharge Apr. 1 

to June 3,1920, possibly slightly in error, owing to change in location of gage. See "Accuracy" in station 

description.

Monthly discharge of Colorado Rirer near Chadwick, Tex., for the years ending Sept. 30,

1919 and 1920.

Discharge in second-feet. Run-off in

1918-19. 

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

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

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

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

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

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

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

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

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

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

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

1919-20. 

December 7-31 ................. . ... ...

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

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

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

Tune ...........

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

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

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

Maximum.

23,000

74,100

18,000

19, 100

9,570

22,800

7,220

29, 300

36,600

13,300

33,200

74,100

2,510

7,220

1,680

430

16,700

2,960

448

10,600

24,700

Minimum.

29

200

75

60

125

121

175

430

395

500

195

175

29

595

350

335

291

272

294

264

258

302

Mean.

5,090

6,960

1.430

2,180

724

2,730

1,630

3,190

8,350

5,5 0

2,870

5,4 0

3, 850

850

1,240

648

326

4,340

685

298

3,140

3,380

acre-feet.

313, 000

414, OOD

87,900

134,000

40,200

168,000

97,000

196,000

497,000

341,000

176,000

325,000

2,790,000

42,100

76,200

37, 300

19,400

267, 000

40, SOD

18,300

193,000

201,000

NOTE. See footnote to table of daily discharge.
COLOEADO EIVEE BASIN. 31

COLORADO RIVER AT MARBLE FALLS, TEX.

LOCATION. At steel highway bridge one-fourth mile south of Marble Falls, Burnet 

County, 10 miles below mouth of Sandy Creek, 16 miles below mouth of Llano 

River, and 23 miles above mouth of Pedernales River.

DRAINAGE AREA. 32,200 square miles (measured on topographic and post-route maps).

RECORDS AVAILABLE. October 1, 1916, to September 30, 1920. Miscellaneous discharge measurements were made in 1902. Records of stage have been obtained 

by the United States Weather Bureau since January 1, 1908.

GAGE. United States Weather Bureau weight and tape gage on upstream side of 

bridge; read by M. M. Berry and M. M. Galloway.

DISCHARGE MEASUREMENTS. Made from bridge or by wading.

CHANNEL AND CONTROL. Bed composed of solid rock. Banks composed of rock, 

gravel, and clay; high, wooded, and not subject to overflow. Rapids just below 

gage serve as permanent control for low and medium stages.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 18.7 feet at 7.30 a. m. September 24 ('discharge, 85,000 second-feet, 

determined from extension of rating curve); minimum stage, 0.70 foot, October 

9 and 10 (discharge, 68 second-feet).

Maximum stage recorded during year ending September 30, 1920, 14.2 feet at 

7.30 a. m., October 11 (discharge, 52,400 second-feet); minimum stage, 1.50 feet 

at 7.30 a. m., July 21 (discharge, 236 second-feet).

1900-1920: Maximum stage recorded, 23.9 feet, April 7, 1900 (discharge, not 

determined); no flow August 7, 8,11-25,1918, caused by storing water above gage.

ICE. None reported during year.

DIVERSIONS. Several large projects have been proposed in the drainage basin above 

station, but none have been developed. Numerous small diversions for irrigation and municipal uses are made above the station. Total amount diverted not 

known. Records of the Board of Water Engineers for the State of Texas show 

that approximately 36,000 acres have been declared irrigated by diversions above 

station. Little water is diverted between Marble Falls and Austin.

REGULATION. None except possibly during extremely low stages.

ACCURACY. Stage-discharge relation permanent. Rating curve well defined. Gage 

read to half-tenths twice daily. Mean of two readings daily during low stages 

may not be true mean owing to operation of water-power plant just above. Daily 

discharge ascertained by applying mean daily gage height to rating table. Records good.

Discharge measurements of Colorado River at Marble Falls, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 2

1919.

May 23

Made by Gage 

height.

Ft. 

1.10

2.74

3.91

4.29

Discharge.

Sec.-ft. 

141

949

2,790

Date.

1920. 

Feb. 14

28 

28

Made by 

T. Twichell. ...........

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

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

Gage 

height.

Ft.

3.82

2.28

2.28 

2.28

Discharge.

Sec.-ft. 

2,780

580

589 

591

« Surface velocities observed and coefficient of 0.85 used to reduce to mean velocity.
32 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Colorado River at Marble Falls, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19

1.....

2.....

3.....

4.....

5.....

6.....

7.....

8.....

9.....

10.....

11.....

12.....

13.....

14.....

15.....

16.....

17.....

18.....

19.....

20.....

21.....

22.....

23.....

24.....

25.....

26.....

27.....

28.....

29.....

30.....

r>1 Ol .....

1919-20

1.....

2.....

3.....

4.....

5.....

6.....

7.....

8.....

9.....

10.....

11.....

12.....

13.....

14.....

15.....

16.....

17.....

18.....

19.....

20.....

21.....

22.....

23.....

24.....

25.....

26.....

27.....

28.....

29.....

30.....

01 Ol .....

Oct.

187

137

114

100

97

83

83

80

68

68

14,900

21,900

22,400

18,600

7,920

4,240

3,120

2,020

1,300

1,120

868

1,570

7,750

20,400

23,400

15,400

8,000

5,620

11,600

12,800'

9,880

3,450

3,120

2,800

2,600

2,600

2,800

3,450

21,400

27,200

35,100

46,000

13,600

7,920

5,620

6,240

12,800

19,000

20,900

11,200

6,890

4,460

6,560

16,200

20,900

21,900

8,630

5,930 

4,460

3,680

3,330

3,220

Nov.

3,450

2,640

2,190

1,300

1,000

1,000

3,640

40,200

46,700

48,500

71,500

24,500

5,080

3,220

2,840

4,680

2,640

2,140

1,690

1,300

1,180

1,280

926

747

725

946

1,240

2,190

2,500

2,270

3,450

10,400

7,920

5,020

3,930

3,330

3,010

4,470

24,000

19,000

8,630

6,890

5,620

3,930

3,450

3,220

3,220

3,010

2,800

2,600

2,600

2,320

2,410

2,410

2,500

2,600

2,410 

2,600

5,020

7,920

Dec.

1,080

805

688

632

618

618

618

618

618

565

481

438

3,330

3, 810

1,030

688

688

805

1,400

1,910

2,270

7,640

34,800

22,900

14,400

8,200

5,470

3,330

2,640

2,270

2,140

5,930

5,620

3,930

3,450

3,220

3,010

3,010

2,900

2,800

2,500

2,410

2,230

2,050

2,050

1,960

1,880

1,880

1,880

2,230

2,230

2,140

2,230

2,050

2,050

1,880

3,010

2,230 

1,640

1,570

1,570

1,720

Jan.

1,750

2,140

2,000

1,460

1,140

1,000

917

818

822

762

740

688

688

703

917

1,460

1,750

3,810

2,950

2,600

6,960

17,800

22,100

22,000

17,100

12,000

7,400

5,620

10,700

4,460

3,220

1,570

1,500

1,430

1,570

1,880

2,800

5,020

4,190

3,450

2,800

3,450

18,000

16,200

9,700

7,580

5,620

4,740

4,190

3,680

3,450

3,450

3,220

3,930

7.920

4,460

3,680

3,450 

3,220

3,010

2,800

9 £ij 7nn IUU

Feb.

2,600

2,410

2,740

7,920

5,020

3,570

2,500

1,910

1,530

1,300

1,360

1,360

1.300

1,300

1,260

1,200

1,800

3,450

2,450

2,000

1,830

1,680

1,530

1,300

1,260

762

1,020

848

2,600

2,500

2,410

2,410

2,410

2,410

2,230

2,230

2,230

2,230

2,230

2,410

2,600

2,500

2,600

2,600

2,230

2,230

2,320

2,140

2,050

1,960

1,880

1,880

1,720

1,720

1,570 

1,570

1,430

Mar.

1,020

779

779

868

1,080

868

779

917

1,260

1,200

897

822

762

1,260

703

848

822

725

667

618

667

632

598

1,140

26,400

18,600

26,200

24,800

16,000

4,880

5,380

1,500

1,430

1,430

1,360

1,300

1,300

1,180

1,300

1,300

1,430

1,430

1,300

1,300

1,180

1,180

1,180

1,180

1,180

1,180

1,180

1,060

1,060

1,180

1,180

1,430

1,720

1,300 

1,800

1,500

1,300

1,180

Apr.

7,230

7,750

3,050

2,640

3,450

9,700

5,020

2,900

2,320

2,090

1,880

1,680

1,200

3,680

2,600

1,800

1,430

1,180

1,060

822

740

703

667

618

565

585

476

438

1,960

3,610

1,060

1,060

1,000

946

946

848

762

762

762

688

762

725

762

688

688

688

688

653

688

618

618

618

618

618

618

653

653

618

585

552

'May.

2,600

2,640

1,880

1,460

1,120

1,910

4,460

15,600

6,080

3,570

6,400

26,100

11,400

9,340

9,880

15,600

11,600

9,060

6,240

6,560

10,200

5,470

1,260

1,910

1,830

18,000

14,700

6,620

6,240

3,500

2,050

585

552

552

1,240

1,300

848

618

6,890

20,900

17,100

5,930

19,000

26,100

14,900

15,800

18,000

13,200

7,580

12,800

11,600

4,460

3,450

2,230

1,880

1,570

1,640

1,430 

1,240

1,060

1,060

1 J., ftftft UVAJ

June.

1,530

1,600

1,390

1,080

3,010

2,360

1,800

1,360

1,830

7,060

21,400

29,800

31,000

31,000

10,800

4,320

3,930

9,880

16,700

18,700

8,520

16,000

14,900

18,400

18,300

29,800

26,200

22,600

19,400

14,500

946

946

1,880

2,050

1,800

1,360

1,240

1,060

762

725

688

1,060

897

762

688

688

653

585

762

1,360

848

946

1,060

848

2,050

2,700

2,230 

1,880

1,300

946

July.

12,200

10,700

6,400

. 4,240

3,450

2,700

15,600

5,620

3,010

2,360

10,800

4,600

2,700

3,120

2,410

2,090

1,910

1,910

1,500

1,240

14,100

41,800

29,100

27,400

22,500

8,450

3,930

2,800

2,360

1,910

1,750

848

848

762

848

848

688

552

492

465

492

762

762

618

492

465

492

438

388

344

304

268

304

344

388

344

304

268 

286

304

438

388

Aug.

1,500

1,260

1,140

1,000

946

917

822

822

762

1,680

897

848

725

688

618

565

504

449

1,360

1,570

10,900

16,000

11,800

10,100

6,460

9,230

5,170

8,000

16,100

10,100

5,780

413

413

492

618

438

618

9,700

1,570

1,430

1,000

762

688

946

1,570

2,410

2,230

2,410

4,190

4,460

10,800

20,900

13,600

11,200

8,280

3,680

14,900

17,600 

12,400

8,280

3,680

4,190

Sept.

3,160

2,410

1,880

1,570

1,390

1,260

1,140

1,000

968

917

848

779

725

779

3,730

6,140

8,630

6,460

7,580

5,170

20,700

26,600

42,600

84,200

51,400

17,400

13,100

6,720

5,020

4,190

5,020

3,930

3,220

2,600

3,120

2,800

2,800

22,900

27,700

27,700

16,700

15,300

6,240

2,800

2,050

1,720

1,570

1,430

1,060

946

946

946

848

848

762

688

618 

618

762

653
COLORADO RIVER BASIN. 33-

Monthly discharge of Colorado River at Marble Falls, Tex.,for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

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

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

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

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

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

1919-20.

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

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

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

Discharge in second-feet.

Maximum.

23,400 

71,500 

34,800 

22,100 

7,920 

26,400 

9,700 

26,100 

31,000 

41,800 

16,100 

84,200

84,200

46,000 

24.000 

5,930 

18,000 

2,600 

1,800 

1,060 

26,100 

2,700 

848 

20,900 

27,700

46,000

Minimum.

68 

725 

438 

688 

762 

598 

438 

1,120 

1,080 

1,240 

449 

725

68

2,600 

2,320 

1,570 

1.430 

1,430 

1,060 

552 

552 

585 

268 

413 

618

268

Mean.

6,960 

9,470 

4,110 

5,110 

2,110 

4,610 

2,460 

7,270 

13,000 

8,210 

4,150 

10,900

6,510

11,400 

5,360 

2,560 

4; 670 

2,180 

1,310 

732 

6,980 

1,190 

501 

5,350 

5,310

3,980

Run-off in 

acre-feet.

428,000 

564,000 

253,000 

314,000 

117,000 

283,000 

146,000 

447,000 

774,000 

505,000 

255,000 

649,000

4, 740, 000

701,000 

319,000 

157,000 

287,000 

125,000 

80,600 

43,600 

429,000 

70,800 

30,800 

329,000 

316,000

2, 890, 000

COLORADO RIVER AT AUSTIN, TEX.

LOCATION. At Congress Avenue concrete viaduct in Austin, Travis County, half a 

mile below Shoal Creek and above mouth of Waller Creek, 1 mile below mouth of 

Barton Creek, and 85 miles below Austin dam.

DRAINAGE AREA. 34,200 4 square miles (measured on standard topographic maps; 

post-route map; and typographic map of Texas, compiled in 1899 by Rob3rt 

T. Hill, of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. February 15, 1898, to December 31, 1911; October 1, 1914, to 

September 30, 1920. September 1, 1895, to April 7, 1900, at Austin dam. Records of stage have been obtained by United States Weather Bureau since July 1. 

1903.

GAGE. Stevens water-stage recorder installed April 26, 1938, on downstream side of 

pier of viaduct, inspected by engineers f.-om United States Geological Survey. 

Record of depth of water on crest of dam 3i miles above Austin was kept Aug. 

13, 1895, to April 7, 1900. Gage used February 15, 1898, to December 31, 1911, 

was a vertical staff, attached to bathhouse on left bank of river 150 feet above 

Congress Avenue bridge; during this period high-stage readings were made by 

means of a gage painted on first pier from left end of bridge, and a chain gage attached to bridge. From October 1, 1914, to June 18, 1915, the vertical gage of 

United States Weather Bureau was read. Record from June 18, 1915, to April 

25, 1918, was obtained by means of Dexter water-stage recorder installed at end 

of viaduct. All gages at or near bridge have been referred to same datum.

DISCHARGE MEASUREMENTS. Made by wading, or from upstream side of Montopolis 

highway bridge, 4 miles below gage.

1 Revised since publication of Water-Supply Paper 308.
34 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

CHANNEL AND CONTROL. Channel straight for 1,000 feet above and 500 feet below 

gage. Right bank of medium height, composed of clay and gravel, clean, improved by city, and subject to overflow; left bank resembles right bank except 

that it is high and nearly vertical in places. Bed composed of rock, gravel, and 

sand; clean; shifts. Control is a gravel and rock shoal, 500 feet below gage; 

changes during high water, and also during low water because of the removal 

of sand for municipal use.

EXTREMES OF DISCHARGE. Maximum stage from water-stage recorder during yeai 

ending September 30, 1919, 19.5 feet at 9 a. m. November 9 (discharge, 74,800 

second-feet); minimum stage, 0.40 foot at midnight October 11 (discharge, 95 

second-feet).

Maximum stage from water-stage recorder during year ending September 30, 

1920, 13.7 feet at 11 p. m. October 11 (discharge, 50,300 second-feet); minimum 

stage, 0.87 foot at 10 p. m. July 29 (discharge, 378 second-feet).

1898-1911; 1914-1920: Maximum stage recorded, 33.5 feet during flood of April 

7,1900, which destroyed the dam. The discharge at that time has been computed 

by means of the formula 5 Q=d/i 3 '2 to be 122,000 second-feet (c=3.09, Z=l,091 

feet; h=ll feet). Recent computations indicate that the discharge probably 

exceeded 122,000 second-feet, but there are insufficient data to enable a more 

exact determination to be made. Minimum stage, 0.18 foot at 6 p. m. August 

18, 1918 (discharge, 2.2 second-feet).

ICE. None.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show that 

approximately 36,000 acres of land have been declared irrigated by diversions 

above station. Most of the area irrigated is in the upper basin of the main stream 

and adjacent to large tributaries. Little water is diverted between Austin and 

Columbus.

REGULATION. Flow entirely regulated at times by operation at the Austin dam, 

about 85 miles upstream. Neither sluice gates, crest gates, nor power plant at 

the dam were in operation during the years ending September 30, 1919 and 1920. 

Capacity of reservoir about 24,000 acre-feet.

ACCURACY. Stage-discharge relation not permanent. Numerous measurements 

were made throughout the period. Standard rating curve well defined between 

20,000 and 30,000 second-feet, and fairly well defined between 30,000 and 75,000 

second-feet. Operation of water-stage recorder satisfactory except for breaks in 

record. Daily discharge ascertained by applying to rating table mean daily 

gage height obtained from recorder graph by inspection or by planimeter, by 

shifting-control method, or for days of considerable fluctuation, by applying gage 

heights for fractional parts of a day to rating table. See footnote to daily-discharge table. Records good.

From recent information it is believed that the discharge as published in WaterSupply Paper 408 for December 13-26, 1914, and February 9-17, 1915, is too low. 

Discharge on these days probably exceeded 20 second-feet.

U. S. Geol. Survey Water-Supply Paper 50, p. 337.
COLORADO RIVER BASIN. 35

Discharge measurements of Colorado River at Austin, Tex., during the years ending Sept.

SO, 1919 and 1920.

Date.

1918. 

Oct. 14

16

18

Nov. 9

12 

13

18

Dec. 2

14

31

1919.

Jan. 23

25

Feb. 11

28

JUar. 14

27

May 5

21

28

Aug. 13

Sept. 10

Made by 

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

R. J. Hank. . ..........

Congdon and Kinnison.

Gowans and Kinnison. .

R.J.Haiik. ...........

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

R.J.Hank.. ..........

C. E.McCashin. .......

R. J. Hank............

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

Ellsworth and Twichell.

Gage 

height.

Feet. 

8.64

3.88

2.32

19.03

16.85

2.35

1.74

2.26

2.12

7.31

8.28

2.00

1 ai

1.56

6.23

2.08

9 O7

5.24

10.02

1.74

1.69

Discharge.

Sec.-ft. 

23,900

7.650

3,090

074,000

o61,100 

ol3,000

3,270

1,710

3,750 

2,630

21,500

2,300

1,780

1,320

c 16, 600

2,800

5,260

13,700

30,000

1.760

1,400

Date.

1919.

11

Nov. 15

1920.

17

31

Feb. 14 

Mar. 2

20

Apr. 14

24

22

22

July 7

21

31

Aug. 24

Sept. 18

Made by 

D.A.Dudley..........

L. D. Snow............

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

Twichell and Pritchett.

Kinnison and Dudley. .

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

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

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

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

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

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

McCashin and Twichell.

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

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

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

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

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

Gage 

height.

Feet. 

6.33

12.08

3.04

2.39

2.02

3.54

2.72

2.50 

2.04

1.76

1.50

1.34

1.30

1.53

3.28

1.80

1.68

1.42

1.00

.95

4.86

1.78

Discharge.

Sec.-ft. 

18,600

42,700

5.830

3,270

2,190

7,240

4,440

3,590 

2,620

1,730

1,150

1,040

737

1,210

6.440

1,690

1.630

1,210

516

447

12,700

1,970

o Surface velocities observed and coefficient of 0.87 used to reduce to mean velocity. 

& Surface velocities observed and coefficient of 0.85 used to reduce to mean velocity. 

' Surface velocities observed and coefficient of 0.90 used to reduce to mean velocity.

Daily discharge, in second-feet, of Colorado River at Austin, Tex., for the years ending

Sept. SO, 1919 and 1920.

Day.

1918-19

1.....

2.....

3.....

4.....

5.....

6.....

7.....

8.....

9.....

10.....

11.....

12.....

13.....

14.....

15.....

16.....

17.....

18.....

19.....

20.....

21.....

22.....

23.....

24.....

25.....

26.....

27.....

28.....

29......

30.....

31

Oct.

472

288

312

247

205

140

140

130

127

123

123

1,380

10,000

23,000

19,000

8,380

4,970

4,350

3,730

3,030

2,470

2,200

1,720

7,950

22,800

26,900

15,600

7,450

5,190

8,990

13.400

Nov.

11,000

5,160

2,860

2,020

1,580

1,320

1,260

17,100

62,300

50,200

64,700

56,700

17,100

5,900

3,820

4,380

4,820

3,080

2,100

1,720

1,400

1,320

1,200

1,110

1,060

1,040

1,020

1,120

1,400

1,780

Dec.

1,970

1,720

1,440

1,240

1,100

988

922

890

840

810

750

750

1,030

3,640

6,210

3,700

2,550

2,040

1,880

2,520

6,050

8,010

12,500

41,500

23,000

12,100

6.830

4,880

3,708

2,970

2.800

Jan.

2,220

2,000

1,900

1,760

1,630

1,460

1,400

1,300

1,240

1,170

1,110

1,060

1,020

1,110

1,670

1,560

2,410

4,070

4,380

4,070

4,040

11,400

20,700

20,800

23,800

14,300

7,610

6,240

7,480

8,350

5.620

Feb.

4,230

3,480

3,200

4,260

9,250

6,060

4,100

3,310

2,780

2,500

2,280

2,150

1,970

1,880

1,740

1,650

1,850

2,360

3,590

3,640

3,110

2,860

2,470

2,300

2,020

1.850

1,760

1,650

Mar.

1,610

1,520

1,440

1,460

1,440

1,400

1,540

1,500

1,380

1,340

1,610

1,560

1.420

1,280

1,220

1,240

1,150

1,130

1,130

1,080

988

939

956

1,020

16,000

24,800

18,100

24,500

21,500

11,300

6.370

Apr.

5,870

6,830

7,580

5,060

3,890

4,010

6,240

6,210

4,480

3,590

3,220

2,890

2,610

2,250

3,450

3,480

2,970

2,520

2,150

1,830

1,650

1,500

1,380

1,280

1,180

1,110

1,060

1,000

1,080

1,340

May.

2,970

3,980

3,140

3,340

3,310

5,720

3,480

4,820

10,800

7,260

6,090

8,990

12,700

10,800

10,400

9,250

11,200

11,600

10,600

7,330

6,340

10, 100

7,200

4,480

3,280

3,060

11,800

13,600

7,330

6,400

5.130

June.

3,530

2,970

3,340

2,660

2,150

2,380

3,110

2,690

2,500

3,000

5,810

18,400

27,600

29,500

23,400

10,500

11,500

7,300

9,440

19,300

16,000

12,900

19,500

16,000

18,300

21,500

31,000

27,700

22,000

18,200

July.

13,300

9,820

8,640

6,610

4,940

4,010

5,370

23,400

8,010

4,570

3,360

7,950

5, 810

3,340

3,080

2,800

2,330

2,410

2,150

1,970

4,010

24,200

39,200

32,100

28,600

20,800

9,570

5,780

4,570

3;820

3,420

Aug.

3,060

2,720

2,470

2,220

2,070

1,920

1,780

1,700

1,560

1,630

1,760

2,200

1,720

1,480

1,320

1,170

1,060

1,000

1,020

1,220

2,890

7,390

24,100

16,800

9,440

7,200

8.260

6,240

7,580

12,500

10,200

Sept.

6,300

4,570

3,310

2,660

2,200

1,900

1,720

1,610

1,500

1,420

1,320

1,170

1,130

990

1,180

3,080

7,080

6,710

8,100

5,870

6,490

6,370

19,500

46,100

64,200

34,100

15,800

10,000

8,260

6,860
36 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Colorado River at Austin, Tex., for the years ending 

Sept. 30, 1919 and 1920 Continued.

Day.

1919-20

1.....

2.....

3.....

4.....

5.....

6.....

7.....

3.....

9.....

10.....

11..

12.....

13.....

14.....

15. ....

16. ....

17.....

18.....

19.....

20.....

21.....

22. ....

23.....

24.....

25.....

26.....

27.....

28.....

29.....

30.....

31

Oct.

6,020

5,400

4,940

4,600

4,350

5,720

6,490

6,340

18,200

29,100

44,600

40,000

18. 100

11,600

10,600

10,300

20,300

22,300

22,300

14,400

10,800

9,310

9,790

17,700

22,300

21,600

12,300

8,830

7,880

7,420

7,110

Nov.

6,800

6,960

13,000

10,600

8,040

7,260

6,640

6,180

8,140

27,400

16,800

9,790

7,730

6,640

5,720

5,160

4,910'

4,750

4,570

4,410

4,100

4,010

3,920

3,790

3,760

3,760

3/890

4,070

3,920

4,690

Dec.

6,990

6.060

5^900

5,130

4,410

4,100

4,010

3,950

3,820

3,700

3,560

3,390

3,220

3,310

3,030

2,750

2,470

2,470

2,170

3,000

3,000

3,000

3,000

3,000

2,720

2,720

2,440

2,170

2,170

2,170

1,920

Jan.

2,330

2.200

2,170

2,120

2,330

2,410

2,970

4,380

4,350

4,010

3,730

4,230

13,400

15,100

10,900

8,350

7,110

6,490

5,990

5,500

5,190

4,910

5,400

5,720

7,080

6,460

5,500

5,190

4,850

4,600

4,380

Feb.

4,230

4,100

4,010

3,920

3,790

3,640

3,590

3,530

3,480

3,450

3,360

3,390

3,420

3,560

3,640

3,560

3,480

3,340

3,200

3,140

3,060

3,000

2,970

2,920

2,830

2,750

2,660

2,440

2,470

Mar.

2.500

2.580

2,550

2,220

2,220

2,220

2,220

2,220

1,970

1,970

1,970

2,300

2,040

2,040

1,800

1,830

1,780

1,800

1,760

1,720

1,700

1,650

1,650

1,650

1,850

2,070

2,970

2,800

3,140

2,550

2,100

Apr.

1,880

1,650

1,580

1,460

1,380

1,380

1.320

1,320

1,320

1,280

1,300

1,280

1,150

1,150

1,200

1,220

1,150

1,180

1,150

1,130

1,060

1,060

1,020

1,040

988

972

856

795

765

780

May.

720

720

720

677

664

1,020

1,340

1,150

4,830

15,900

9,990

6,800

13,100

18,500

16,100

20,600

18,200

11,300

8,350

10,600

10,300

6,340

4,230

3,340

2,860

2,520

2,220

1,970

1,800

1,630

1,500

June.

1,480

1,400

1,380

1,850

3,060

2,720

2,250

1,970

1,650

1,400

1,200

1,100

1,040

1,110

1,100

1,060

988

1,000

1,020

939

1,150

1,580

1.480

1,400

1,380

1,480

2,750

2,470

2,380

2,070

July.

1,700

1,440

1.280

1,170

1,540

1,380

1,180

1,060

922

856

810

735

856

988

906

735

651

638

599

549

505

472

432

432

441

483

461

472

423

405

450

Aug.

599

651

638

638

651

720

10,400

28,100

9,150

4,570

3,140

2,660

2,580

4,040

4,070

3,860

5,400

5,590

5,620

5,840

6,810

11,100

11,800

12,500

9,600

6,400

10,400

15,100

11,500

8,540

5,720

Sept.

4,160

5,440

5,130

4,350

3,390

3,8,90

3,590

5,220

20,000

24,400

23.100

14,100

10,600

6,460

3,670

2,830

2,330

1,950

1,720

1,560

1,380

1,300

1,180

1,130

1,060

956

873

750

677

664

NOTE. No record Oct. 18-23. 1918, and Feb. 28 to Mar. 3, 1919; gage heights interpolated. Indirect 

method for shifting control used Oct. 12-23, Nov. 1-7, Dec. 1-22,1918; Jan. 16 to Feb. 1, Feb. 19 to Mar. 12, 

Mar.25 toJune 11, JuneH to July 21, Aug. 30 to Sept. 22, Oct. 8,1919, to Feb. 19,1920, Feb. 22 to Mar.15,

Mar. 2-3, 29-31, Apr. 5-6, 1920. Gage heights obtained from U. S. Weather Bureau staff-gage records: 

Dee. 14-31, 1919; Jan. 13-16, Feb. 28-29, Mar. 1 and 4-15, 1920.

Monthly discharge of Colorado River at Austin, Tex., for the years ending Sept. 30, 1919

and 1920

Month.

1918-19.

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

December. ....... .

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

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

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

Discharge in second-feet.

Maximum.

26,900 

64,700 

41,500 

23,800 

9,250 

24,800 

7,580 

13,600 

29,500 

39,200 

24,100 

64,200

64,700

Minimum.

123 

1,020 

750 

1,020 

1,650 

939 

1,000 

2,970 

2,150 

1,970 

1,000 

990

123

Mean.

6,280 

11,100 

5,200 

5,450 

3,010 

4,960 

3,120 

7,310 

13,100 

9,680 

4,760 

9,380

6,950

Run-off 

in acrefeet.

386,000 

660,000 

320,000 

335,000 

167,000 

305,000 

186,000 

449,000 

780,000 

595,000 

293,000 

558,000

5,030,000
COLORADO RIVER BASIN. 37

Monthly discharge of Colorado River at Austin, Tex.,Jor the years ending Sept. 30,1919

>and 1920 Continued.

Month.

1919-20.

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

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

Discharge in second-feet.

Maximum.

44,600 

27,400 

6,990 

15,100 

4,230 

3,140 

1,880 

20,600 

3,060 

1,700 

28,100 

24,400

44,600

Minimum.

4,350 

3,760 

1,920 

2,120 

2,440 

1,650 

765 

664 

939 

405 

599 

664

405

Mean.

14,200 

7,050 

3,410 

5,460 

3.340 

2,120 

1,190 

6.450 

1,600 

806 

6,720 

5,260

4,820

Run-off 

in acrefeet.

873,000 

420,000 

210,000 

336,000 

192,000 

130,000 

70,800 

397,000 

95,200 

49,600 

413,000 

313,000

3,500,000

Days of deficiency in discharge of Colorado River at Austin, Tex., for the years endiny 

Sept. 30, 1902-1910 and 1915-1920.

Discharge

in

feet.

100

200

300

400

500

600

700

800

900

1,000

1,200

1,400

1,600

1,800

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9,000

10,000

20,000

30,000

40,000

50 000

60^000

75,000

100,000

Days of deficient discharge.

I

1

20

68

167

216

236

251

263

271

284

292

301

313

317

330

338

341

343

344

347

349

353

356

361

365

S

O5

10

30

59-

77

90

108

122

148

197

218

232

247

260

307

321

331

340

344

346

350

351

360

362

365

^

c&

22

130

189

223

243

259

266

273

286

292

300

305

309

322

332

337

342

346

348

350

352

359

364

365

366

i<3s

20"7^

150

177

196

218

234

242

247

263

273

282

291

2%

315

327

334

339

342

345

347

348

359

363

364

364

365

S

O5

135

185

198

207

221

224

231

234

241

247

255

263

267

291

301

314

320

323

325

330

335

350

359

362

362

364

365

Cft

AZ

103

204

228

253

261

292

300

305

310

315

Oi

11

41

78

92

142

166

179

190

225

323 256

327

331

334

342

345

347

261

271

276

299

317

322

348 329

348 331

348 336

348 340

352 344

363

365

351

357

361

3fW!

364

OfiC

2

o>

34

94

156

195

203

226

234

244

250

273

293

299

310

317

332

342

347

349

352

354

355

356

362

365

o

^

o>

36

102

165

228

241

266

279

281

294

307

319

321

321

322

335

338

341

343

345

350

352

354

364

365

1C

I

TJ1

C6

26

11

68

72

83

95

112

120

135

142

205

240

255

262

262

289

307

314

324

338

347

348

349

355

357

362

362

363

365

10

J>

c&

3

52

97

145

177

222

239

257

272

289

300

310

315

318

338

346

353

355

358

359

360

362

365

366

i--

i

CB

Ati

81

203

264

281

290

298

303

313

315

321

333

341

343

343

351

355

358

363

363

364

364

365

00

Ac&

39

182

233

247

260

273

286

301

308

315

326

327

332

335

336

347

354

355

356

357

357

358

360

363

364

365

OS

Jb

c&

6

9

10

11

11

11

13

16

22

51

70

91

112

123

170

207

229

242

261

276

286

292

333

355

358

360

362

365

o

I

os

10

14

24

34

39

47

73

91

104

116

130

183

231

263

284

301

308

314

320

352

364

364

366

EVAPORATION NEAR AUSTIN, TEX.

LOCATION. At reservoir on Hill ranch, 1,000 feet from ranch house, 5 miles south of 

Austin, Travis County. Elevation, 475 feet above sea level.

RECORDS AVAILABLE. April, 1916, to September 30, 1920.

EQUIPMENT. Two evaporation pans, one floating on surface of reservoir and the 

other on land about 30 feet from reservoir; auxiliary equipment consists of hook 

gage, rain gage, anemometer, maximum and minimum thermometers, and 

psychrometer.

ACCURACY. Observations made daily at 8 a. m. Observer's work good

COOPERATION. Computations made by United States Weather Bureau.
38 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Evaporation near Austin, Tex.,for the years ending Sept. SO, 1919 and 1920.

Month.

1919. 

October ... 

November. .. 

December. .. 

January... .. 

February.. ..

April .........

May..........

July..........

September. . . . 

The year . . .

1920. 

October ... 

November. .. 

December . . . 

January ... 

February. . . .

April .........

July..........

September.... 

The year . . .

Temperature (" F.).

Air.

Mean maximum.

81.4 

63.8 

a 62. 3 

o57.0 

59.9 

69.4 

78.1 

81.3 

85.9 

90.4 

92.2 

86 3

75.7

80.3 

68.9 

660.8 

54.1 

64.6 

71.5 

81.3 

86.2 

89.1 

95.1 

91.3 

92.1

77.9

Mean minimum.

58.0 

45.7 

40.5 

35.7 

39.5 

45.3 

55.4 

61.5 

67.0 

70.8 

70.6 

66.8

54.7

64.2 

46.5 

35.8 

36.1 

42.9 

44.1 

53.2 

65.9 

67.0 

71.2 

70.7 

66.8

.55.4

Mean.

69.7 

54.8 

5L.4 

46.4 

49.7 

57.4 

66.8 

71.4 

76.4 

80.6 

81.4 

76.6

65.2

72.2 

57.7 

48.3 

45.1 

53.8 

57.8 

67.2 

76.0 

78.0 

83.2 

81.0 

79.4

66.6

Water.

Floating 

pan 

(mean).

66.0 

54.5 

49.2 

<*48.8 

49.7 

57.1 

66.2 

72.2 

77.3 

80.4 

82.9 

77.0

65.1

72.2 

57 7 

» 45. 8 

6 45. 9 

54.1 

56.4 

64.6 

75.4 

79.3 

80.7 

79.7 

77.2

65.8

Land 

pan 

(mean).

62.9 

51.7 

o47.7 

c44.3 

o45.9 

51.9 

60.5 

68.1 

73.3 

77.3 

81.5 

<*76.0

61.8

69.5 

53.1 

544.8 

6 43. 1 

48.9 

50.7 

58.0 

71.8 

75.2 

77.3 

77.3 

73.7

62.0

Mean relative humidity 

(per 

cent).

87.1 

85.9 

689.0 

<J92.6 

o82.1 

83.9 

88.0 

89.0 

90.0 

92.9 

92.6 

093.9

88.9

94.6 

84.9 

687.7 

689.9 

86.3 

69.3 

67.6 

82.0 

81.9 

76.5 

86.3 

81.2

82.4

Wind.

Average velocity 

(miles 

per 

hour).

1.9 

2.3 

2.6 

3.3 

3.4 

2.S 

1.7 

.9 

1.1 

.3 

.6 

1.0

1.8

1.3 

2.0 

2.7 

3.3 

2.8 

3.7 

2.9 

1.7 

.6 

.9 

.5 

.8

1.9

Prevailing 

direction.

East......

North. .... 

West...... 

Northwest 

South.. .. 

East... .. 

South.. .. 

South.. .. 

East... .. 

South.. .. 

South.. ..

South. .... 

North.... 

North.. . 

North.. . 

North.. . 

North.. . 

South.. . 

East... . 

Southeast . 

South.. .. 

South.. .. 

South.. ..

Rainfall 

(inches).

3.56 

4.55 

3.70 

4.63 

2.33 

2.63 

3.37 

5.36 

9.17 

13.86 

2.65 

3.12

58.93

10.70 

1.48 

1.49 

5. 43 

.41 

1.33 

1.25 

7.04 

3.98 

.68 

3.63 

2.00

39.42

Evaporation 

(inches).

Floating 

pan.

3.314 

2.142 

1.542

2.572 

3. 225 

4.192 

3. 755 

4.197 

5.172 

6.140

"i'soo"

1. o79 

1.532 

1 986 

4.871 

6.625 

6.030 

5.184 

6.909 

5.567 

5.289

Land 

pan.

5.882 

2.878 

2.507

1.933 

4.191 

5.772 

5.523 

6.974 

5. 785 

6.693 

4.830

3. 537 

3.155 

1.889 

1.901 

2.733 

6.146 

6.779 

6.323 

6.392 

8.469 

6.154 

6.881

60. 359

o One day missing. b Two days missing. c Three days missing. d Four days missing.

NOTE. Evaporation from floating pan estimated for parts of February, March, August, September, 

November, 1919; January, February, March, May, August, and September, 1920. Evaporation from 

land pan estimated for parts of February, July, Ausoist, October, and November, 1919; January and 

March, 1920.

COLORADO RIVER AT COLUMBUS, TEX.

LOCATION. At county highway bridge half a block from county jail, 400 feet below 

Galveston, Harrisburg & San Antonio Railway bridge, in eastern edge of Columbus. 

Colorado County.

DRAINAGE AREA. 37,000 square miles 6 (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert 

T. Hill, of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. August 2, 1902, to December 31, 1911; May 22. 1916, to 

September 30, 1920. Records of stage have been obtained by the United States 

Weather Bureau since January 1, 1903.

GAGE. Gurley graph water-stage recorder, inspected by A. S. Lowrey. From 

August 2, 1902, to December 16, 1907, gage heights were obtained by measuring 

with a tagged chain and lead weight from point on top of bridge pier to water 

surface. Mott tape and weight gage on downstream handrail of bridge, property 

of the United States Weather Bureau, was read from 'December 17, 1907, to 

February 9, 1917, when regulation United States Geological Survey chain gage 

was installed and used until present Gurley water-stage recorder was installed 

on April 30, 1919. All gages referred to same datum.

6 Revised since publication of Water-Supply Paper 308.
COLOEADO EIVER BASIN. 39

DISCHARGE MEASUREMENTS. Made from upstream side of bridge or by wading.

CHANNEL AND CONTROL. Channel straight above and below station for 400 feet. 

Right bank composed of firm earth; high and not subject to overflow. Left 

bank of medium height; overflow likely. Bed of stream clean and sandy; shifts. 

A sand and gravel section 350 feet below gage may serve as low-water control; 

the stage-discharge relation during medium and high stages may be controlled 

by a bend in river below bridge.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 33.9 feet at 7 a. m. November 14 (discharge, 55,100 second-feet); minimum stage, 5.35 feet at 7 a. m. October 7 (discharge, 94 second-feet).

Maximum stage recorded during year ending September 30, 1920, 34.6 feet at 

6 a. m. October 14 (discharge, 55,800 second-feet).; minimum stage, 7.18 feet 

from 4 a. m. to 6 p. m. July 28 (discharge, 639 second-feet).

1902-1911; 1916-1920: Maximum stage recorded, 35.8 feet April 27, 1908 

(revised discharge, 60,300 second-feet); minimum stage, 4.2 feet September 9 

and 10, 1910 (discharge, 10 second-feet).

DIVERSIONS. Considerable water is diverted for irrigation in the drainage basin 

above Austin, but between Austin and Columbus little water is diverted. The 

station is above the irrigated rice belt, which comprises several thousand acres. 

Records of the Board of Water Engineers for the State of Texas show that about 

36,000 acres have been declared irrigated above Austin.

HEGULATION. Flow at Columbus during low stages partly controlled by storage at 

Lake Austin.

ACCURACY. Stage-discharge relation not permanent. Rating curve fairly well 

defined below 55,000 second-feet. Gage read to hundredths twice daily to April 

30, 1919, after that date operation of water-stage recorder satisfactory except 

as indicated in footnote to daily-discharge table. Mean of two readings a day 

may not be true index of daily gage height. Mean daily gage heights obtained 

from recorder graph by inspection or by use of planimeter. Daily discharge 

ascertained by applying mean daily gage height to rating table, or by shiftingcontrol method. Records fair for low and medium stages. By comparison 

with records on Colorado River at Wharton, it appears probable that discharge 

above 20,000 second-feet may be too high.

COOPERATION. Morning gage readings from October 1, 1918, to April 30, 1919, 

furnished by United States Weather Bureau.

Discharge measurements of Colorado River at Columbus, Tex., during the years ending

Sept. SO, 1919 and 1920.

Date.

1918. 

Oct. 10

Nov. 13

14

14

15

15

1919.

20

Apr. 21

May 30

Made by 

H. B. Kinnison........

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

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

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

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

C. E. McCashin.. ......

son.

Gage 

height.

Feet. 

6.90

33.32

33.97

33.39

24.18

22.59

9.58

9.91

9.28

16.28

Discharge.

Sec.-ft. 

608

"54,400

56,600

52,400

21,800

19,100

2,870

2,760

2,590

11. 300

Date.

1919.

July 9

AIIP ft

29

Oct. 7

1920. 

Feb. 25

May 13

July l

Made by 

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

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

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

H. B. Kinnison...

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

Gage 

height.

Feet. 

23.28

17.02

10.34

13.99

12.37

11.54

10.36

14.16

9.62

7.48

Discharge.

Sec.-ft. 

26,100

617,400

3,610

9,390

5,360

c6,250

3,260

8,710

2,410

838

o Surface velocity observed and coefficient of 0.94 used to reduce to mean velocity. 

6 Surface velocity observed and coefficient of 1.00 used to reduce to mean velocity 

c Made during rising stage.
40 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Colorado River at Columbus, Tex.,for the years ending

Sept. 30, 1919 and 1920.

Day.

1918-

19.

1....

2....

3....

4....

5....

6....

7....

8....

9....

10....

11....

12....

13....

14. . . .

15....

16....

17. ...

18....

19....

20....

21....

22....

23....

24....

25....

26....

27. ...

28. ...

29

30

31

1919-

20.

1....

2....

3....

4....

5....

6....

7....

8....

9....

10. ...

11....

12....

13....

14....

15. ...

16....

17....

18....

19....

20....

21....

22....

23....

24....

25. ...

26....

27....

28. ...

29....

30....

31....

Oct.

2,600

2,690

1,420

862

540

470

185

3,420

1,170

570

364

1,160

595

372

392

14,900

15,900

10,400

6,460

5,040

3,650

2,760

2,170

2,140

2,700

5,590

24,100

22,300

12,900

8,860

6,640

10,800

8,750

7,190

6,250

10,400

6,860

5,220

10,800

8,750

7,190

24,400

44,900

51,400

54,000

39,800

35,500

47,000

38,400

29,500

27,100

22,500

16,600

13,300

11,200

11,600

19,200

23,300

18,600

12,000

9,480

8,390

Nov.

8,660

12,600

10,700

7,560

5,050

3,730

2,890

2,410

5' 770

31,100

46,000

49,200

52,900

54,300

28,200

11,800

8,300

6,370

6,580

5,680

6,000

4,130

2,710

2,100

3,460

3,020

2,000

1,680

1,480

1,340

7,530

6,860

6,250

6,250

11,000

9,480

7,530

6,700

6,100

6,550

14,300

24,100

14,100

10,000

8,040

6,860

6,100

5,500

5,220

4,940

4,670

4,540

4,410

4,150

4,030

4,150

3,790

3,550

3,670

3,790

Dec.

1,310

1,430

1,600

1,940

1,680

1,580

1,290

1,160

1,010

960

843

882

4,360

7,290

4,700

2,050

4,080

4,050

3,440

2,890

2,960

1,920

2,620

9,150

32,800

33,300

20,100

12,100

8,210

6,500

5,230

3,790

4,030

6,700

7,020

5,950

5,500

4,940

4,540

4,410

4,280

4,280

4,030

3,910

3,790

3,550

3,440

3,330

3,330

4,280

7,870

5,500

3,910

3,790

3,670

3,550

3,550

3,330

3,220

3,110

3,000

3,000

Jail.

4,080

3,720

3,180

2,710

2,290

2,180

1,930

1,880

1,530

1,440

1,360

1,200

1,200

1,120

1,360

17,700

7,170

4,440

2,280

2,070

4,100

10,500

17,200

17,900

18,100

22,300

20,400

12,700

8,350

6,640

7,220

2,800

2,800

2,700

2,650

2,800

6,700

7,700

6,100

6,100

5,800

5,080

16,400

30,000

17,100

16,600

14,600

11,400

9,290

7,700

6,860

6,400

5,950

9,110

43,100

39,100

13,100

10,400

8,930

7,530

6,860

6,400

Feb.

8,140

6,880

5,140

4,440

4,180

3,810

8,140

6,730

5,050

4,100

3,570

3,310

3,370

2,860

2,580

2,450

2,300

2,280

2,860

3,570

3,480

5,050

3,860

3,430

3,200

2,920

2,720

2,450

5,950

5,650

5,360

5,220

5,080

4,940

4,800

4,670

4,540

4,540

4,410

4,940

4,540

4,280

4,280

4,280

4,410

4,410

4,280

4,150

3,910

3,790

3,670

3,550

3,330

3,220

3,110

3,000

2,900

Mar.

2,200

2,100

1,990

1,880

1,750

1,690

1,700

1,660

1,440

1,610

1,610

1,440

1,520

1,540

1,620

1,520

1,420

1,320

1,260

1,240

1,200

1,200

1,090

1,100

1,290

1,400

21,500

18,100

19 200

24*500

19^400

2,809

2,800

2,700

2,700

2,600

2,600

2,410

2,320

2,280

2,280

2,230

2,180

2,140

2,140

2,100

2,050

2,010

1,970

1,930

1,860

1,780

1,780

1,740

1,740

1,780

1,740

1,780

1,860

2,010

2,650

2,750

Apr.

12,000

8,180

7,310

10,800

8,040

5,920

4,770

4,540

5,280

7,220

5,830

4,310

3,610

3,280

2,820

2,520

2,320

3,290

3,210

2,390

2,340

2,100

1,970

1,880

1,720

1,610

1,490

1,390

1 360

1,470

2,950

2,500

2,410

2,100

1,780

1,670

1,600

1,520

1,520

1,440

1,370

1,370

1,300

1,300

1,260

1,230

1,200

1,160

1,120

1,090

1,060

1,060

1,020

993

993

960

941

941

947

947

May.

1,260

1,860

1,610

2,430

3,380

2,860

8,950

24,500

13,400

7,900

11,200

15,500

18,700

13,400

13,200

11,500

11,500

12,100

14,100

13,000

12,000

8,970

7,440

15,100

12,500

6,280

9 780

13' 200

8,700

960

960

993

993

960

993

993

1,300

2,460

3,670

2,320

11,400

10,200

12,100

25,300

22,100

29,500

24,400

16,600

12,700

9,860

11,000

10,600

7,360

5,500

4,280

3,550

5,650

4,670

3,000

2,500

June.

7,680

13,300

11,400

6,440

4,680

4,190

3,540

3,100

3,420

11,800

10,400

9,000

7,050

27,600

26,400

25,200

28,200

37,600

46,300

43,400

38,100

34,100

2,410

2,500

3,790

3,000

2,320

2,180

2,800

4,030

3,910

2,900

2,600

2,320

2,100

1,900

1,780

1,710

1,670

1,630

1,780

1,670

1,740

1,740

1,670

2,050

2,800

2,500

1,900

1,820

1,820

2,460

July.

27,200

24,100

17,300

14,700

12,800

10,700

8,750

8,070

14,100

19,400

10,700

7,870

6,310

8,660

8,640

6,260

5,210

5,420

5,320

4,270

4,380

29,600

33,200

46,100

46,900

38,100

32,200

22,600

13,800

9,610

7,650

2,460

2,360

2,140

1,900

1,740

1,600

1,520

1,820

1,670

1,440

1,410

1,300

1,160

1,090

1,060

1,023

1,060

1,060

993

928

869

843

812

788

728

692

656

639

764

686

788

Aug.

6,380

5,460

4,840

4,250

3,810

3,440

3,120

2,870

2,710

3,280

2,940

3,070

2,630

2,500

2,760

2,400

2,200

2,000

1,900

1,800

2,260

4,150

7,380

19,000

22,700

15,200

10,500

8,700

8,750

7,530

7,730

888

800

698

740

836

843

856

1,020

11,200

16,400

9,670

6,100

4,670

6,100

4,800

3,790

4,030

3,670

3,670

4,940

5,220

5,650

6,700

10,800

11,800

11,400

8,930

6,860

9,670

13,700

10,400

Sept.

12,500

10,500

7,440

5,840

4,660

3,930

3,690

3,460

3,220

2,990

2,750

2,520

2,280

2,120

2,720

3,990

3,970

3,300

6,400

7,480

8,440

7,550

11,900

30,700

41,600

48,500

53,000

44,000

21,900

14,800

8,390

6,550

5,220

5,220

5,650

5,080

4,410

3,910

4,280

5,800

18,600

22,300

19,700

13,900

11,800

8,390

5,950

4,540

3,670

3,110

2,600

2,280

2,050

1,930

1,780

1,710

1,630

1,560

1,440

1,340

NOTE. Discharge interpolated June 23 and Sept. 7-12,1919. Discharge estimated as follows: May 24 and 

25, 1919, 25,000 second-feet; and June 14-21, 1919, 27,000 second-feet. Discharge determined by shiftingcontrol method Oct. 1 to Dec. 10, 1919; Jan. 16 to Aug. 20, and Sept. 11-30, 1920. Discharge partly estimated owing to incomplete record, Jan. 12-13,23-21, June 23-26, July 7-9,1920. U. S. Weather Bureau gage 

readings used in determining discharge Dec. 20-26, 1919; May 8-13,1920.
COLORADO RITER BASIN. 41

Monthly discharge of Colorado River at Columbus, Tex., for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19.

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

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

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

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

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

1919-20. 

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

24,100 

54,300 

33,300 

22,300 

8,140 

24,500 

12,000

46,900 

22,700 

53,000

54,300

54,000 

24,100 

7,870 

43,100 

5,950 

2,800 

2,950 

29,500 

4,030 

2,460 

16,400 

22,300

54,000

Minimum.

185 

1,340 

843 

1,120 

2,280 

1,090 

1,360 

1,260 

3,100 

4,270 

1,800 

2,120

185

5,220 

3,550 

3,000 

2,650 

2,900 

1,740 

941 

960 

1,630 

639 

698 

1,340

639

Mean.

5,270 

12,900 

5,920 

6.780 

4,030 

4,600 

4,170 

11,200 

20,600 

16,400 

5,750 

12,600

9,200

20,700 

7,140 

4,280 

10,900 

4,320 

2,180 

1,390 

8,030 

2,320 

1,230 

6,030 

6,160

6,250

Run-off in

acre-feet.

324.000 

768.000 

364,000 

417,000 

224,000 

283,000 

248,000 

689,000 

1,230,000 

1,010,000 

354,000 

750,000

6,660,000

1,270,000 

425,000 

263,000 

670,000 

248,000 

134,000 

82,700 

494,000 

138,000 

75,600 

371,000 

367,000

4,540,000

COLORADO RIVER AT WHARTON, TEX.

LOCATION. At highway bridge in western edge of Wharton, Wharton County, 200 

feet below Galveston, Harrisburg & San Antonio Railway bridge

DRAINAGE AREA. 37,400 square miles (measured on standard topographic maps, 

post-route map: and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of the United States Geological Survey; scale, 1 inch=25 miles

RECORDS AVAILABLE. July 12 to August 31, 1916; July 3 to August 18, 1917; Julj 

11 to August 4, 1918; and March 19, 1919, to September 30, 1920.

GAGE. Gurley 7-day water-stage recorder attached to pier of highway bridge near 

left bank, installed March 19,1919. Prior to this date, vertical staff on right bank 

75 feet below bridge. Elevation of zero of old staff gage, 1.93 feet higher than 

zero of recorder.

DISCHARGE MEASUREMENTS. Made from highway or railway bridge or by wading.

CHANNEL AND CONTROL. Channel straight above and below station for a few hundred 

feet. Bed composed of sand and clay, and liable to shift. Both banks medium 

in height, composed of clay, and subject to overflow during extreme stages.

EXTREMES OP DISCHARGE. Maximum stage during year ending September 30, 1919, 

from water-stage recorder, 32.45 feet at midnight June 18 (discharge, 37,600 

second-feet, determined from extension of rating curve); minimum stage, 5.01 

feet at 8 a. m. March 25 (discharge, 1,420 second-feet).

Maximum stage during year ending September 30, 1920, from water-stage 

recorder, 33.9 feet at midnight October 15 (discharge, 39,600 second-feet, ascertained from extension of rating curve); minimum stage, 4.95 feet at 6 p. m. July 

29 (discharge, 518 second-feet).

1916-1920- Maximum stage recorded during periods of record, 33.9 feet at midnight, October 15, 1919 (discharge, 39.690 second-feet, determined from extension 

of rating curve); minimum stage, 0.90 foot at 7 a. m. August 1. 1917 (discharge 

62 second-feet).
42 SURFACE WATER SUPPLY, 1919-1&20, PART VIII.

ICE. None.

DIVERSION. Station is in area of rice irrigation, roughly estimated to cover about 

75,000 acres, about one-third of which is irrigated by diversion from Colorado 

River between Columbus and Wharton, and the remaining two-thirds by diversions below Wharton. During periods of maximum demand, practically the entire 

flow is diverted, unless the river is above ordinary stage.

REGULATION. Flow at low and medium stages is regulated to some extent by storage 

in Austin Lake.

ACCURACY. Stage-discharge relation changed during high water in September, 1919. 

Rating curve used during year ending September 30, 1919, fairly well denned 

between 200 and 30,000 second-feet; curve used for year ending September 30, 

1920, well defined from 200 to 15,000 second-feet, fairly well defined to 30,000 

second-feet, and extended above. Operation of water-stage recorder satisfactoryf 

except as shown in footnote to daily-discharge table. Daily discharge ascertained 

by applying to rating table mean daily gage height, determined by inspecting 

gage-height graph, or on days of considerable fluctuation by use of planimeter. Records good, except during extremely high stages.

Discharge measurements of Colorado River at Wharton, Tex., during the years ending

Sept 30, 1919 and 1920.

Date.

1919.

Mar. 28

May 6

13

19

24

26

July 19

Made by 

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

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

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

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

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

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

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

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

Gage 

height.

Feet. 

15.56.

19.24

7.68

18.29

15.56

24.00

24.74

10.26

Discharge.

Sec.-ft.

617,000

3,380

617,000

12,700

6 23 300

5,140

Date.

1919. 

Aug. 13

Oct. 6

Dec. 17

1920.

Feb. 27

Mar 9Q

July 28

Made by 

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

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

H. C. Pritchett.........

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

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

Gage 

height.

Feet. 

8.09

17.47

8.99

9.13

8.94

6.96

5.03

Discharge.

Sec.-ft. 

3,250

14,400

3,490

3,760

2,310

3,450

1,670

543

» Surface velocity observed and coefficient of 0.90 used to reduce to mean velocity. 

6 Surface velocity observed and coefficient of 0.92 used to reduce to mean velocity.
COLOBADO RIVER BASIN. 43

Daily discharge, in second-feet, of Colorado River at P 

Sept. 30, 1919 and 192

Day.

1919. 

1......

2......

3......

4......

5......

6......

7......

8......

9......

10......

11...... 12..:...

13......

14......

15......

16......

17......

18......

19......

20......

21......

22......

23......

24. .....

25......

26......

27......

28......

29......

30......

31......

1919-20. 

1......

2...... 

3...... 

4......

6...... 

7...... 

8......

9......

10......

11...... 

12......

13......

14......

15......

16......

17......

18......

19......

20......

21......

22......

23. .....

24......

25......

26...... 

27...... 

28...... 

29...... 

30......

31......

Oct. Nov.

1

13,700 

10,800 

9,030 

7,990 

7,340

13,100 

10,500 

7,600 

12,000 

9,030

10,800 

24,900 

31,200 

35,300 

38,800

38,400 

34,400 

36,100 

36,000 

29,200

24,800 

19,600 

15,400 

12,900 

11,600

13,800 

19,200 

21,200 

16,400 

11,900

10,200

9,030 

8,250 

7,600 

6,950 

' 7,600

11,200 

9,420 

7,730 

6,950 

6,470

7,340 

18,300 

18,600 

12,600 

10,600

9,800 

9,010 

8,220 

7,420 

6,630

5,830 

5,040 

4,710 

4,600 

4,380

4,380 

4,270 

4,050 

3,950 

3,950

........

Dec. Jan.

4,160 

4,380 

4,600 

7,470 

7,080

6,350 

5,870 

5,150 

4,710 

4,490

4,380 

4,270 

4,160 

4,050 

3,950

3,750 

3,550 

3,450 

3,550 

5,150

6,470 

5,150 

3,950 

3,750 

3,650

3,550 

3,550 

3,450 

3,350 

3,250

3,150

3,050 

2,960 

2,960 

2,870 

2,780

3,050 

7,340 

8,380 

6,590 

6,830

6,350 

6,830 

21,600 

23,000 

15,700

15,700 

13,600 

11,200 

9,680 

8,770

8,250 

7,860 

7,730 

22,500 

33,700

34,800 

16,100 

12,200 

10,300 

9,160

8,380

Feb.

7,860 

7,470 

6,950 

6,590 

6,350

6,110 

5,870 

5,630 

5,390 

5,270

5,150 

5,040 

5,510 

5,150 

4,820

4,710 

4,710 

4,820 

4,820 

4,710

4,490 

4,380 

4,160 

4,050 

3,950

3,750 

3,650 

3,550 

3,450

Mar.

1,590 

1,570

1,540 

1,480 

1,460 

1,440 

1,440

1,570 

10,000 

16,900 

15,400 

19,600

3,350 

3,250 

3,150 

3,150 

3,050

2,960 

2,960 

2,870 

2,780 

2,780

2,780 

2,690 

2,600 

2,600 

2,600

2,600 

2,510 

2,420 

2,420 

2,330

2,240 

2,240 

2,150 

2,150 

2,150

2,060 

2,060 

2,060 

2,240 

2,240 

2,780

Apr.

15,600 

9,900 

7,270 

7,180 

10,500

8,800 

6,220 

5,140 

4,580 

5,350

6,520 

5,310 

4,340 

3,830 

3,490

3,160 

2,870 

2,680 

3,140 

3,290

2,900 

2,620 

2,380 

2,190 

2,030

1,900 

1,900 

1,730 

1,680 

1,6-0

3,050 

3,150 

2,960 

2,780 

2,600

2,240 

2,060 

1,970 

1,890 

1.890

1,890 

1,890 

1,810 

1,810 

1,730

1,650 

1,570 

1,570 

1,490 

1,490

1,490 

1,410 

1,410 

1,410 

1,340

1,340 

1,340 

1,270 

1,200 

1,200

7 harton, Tex.,for the years ending 

0.

May.

1,650 

1,620 

1,760 

1,830 

2,120

3,110 

2,900 

15,500 

18,600 

11,500

7,920 

11,600 

16,400 

15,500 

12,800

12,000 

11,300 

10,500 

12,300 

12,900

12,100 

10,600 

8,340 

9,610 

26,100

23,000 

14,200 

10,600 

6,600 

11,100 

11,500

1,200 

1,200 

1,130 

1,130 

1,130

1,130 

1,060 

1,270 

1,270 

2,330

3,350 

4,380 

11,000 

8,770 

15,800

22,200 

21,900 

24,000 

18,900 

14,800

12,000 

10,300 

10,600 

10,900 

10,800

10,100 

9,550 

9,030 

7,990 

5,750 

4,050

June.

8,660 

7,880 

14,300 

10,100 

6,550

4,980 

5,430 

3,730 

3,550 

6,020

15,600 

11,700 

8,800 

11,000 

20,700

26,600 

32,000 

36,800 

37,000 

25,200

14,600 

20,900 

22,600 

18,000 

22,600

25,600 

30,000 

33,000 

34,400 

32,400

3,450 

3,150 

3,250 

3,950 

3,750

2,960 

2,690 

2,960 

4,050 

4,270

3,450 

2,960 

2,600 

2,240 

1,970

1,810 

1,650 

1,570 

1,340 

1,340

1,340 

1,270 

1,340 

1,200 

1,490

2,870 

2,780 

2,060 

1,810 

1,730

July.

29,000 

23,500 

19,700 

15,300 

13,400

11,900 

10,200 

8,690 

8,120 

17,100

15,000 

10,200 

7,980 

6,890 

9,590

8,300 

6,480 

5,600 

5,840 

5,570

4,760 

9,240 

27,800 

30,300 

32,800

35,100 

33,700 

28,500 

18,800 

12,700 

9,960

2,060 

2,330 

2,330 

2,150 

1,970

1,730 

1,570 

1,410 

1,810 

1,810

1,650 

1,490 

1,490 

1,340 

1,270

1,130 

1,000 

940 

890 

840

740 

690 

690 

650 

650

610 

610 

570 

570 

590 

650

Aug.

8,280 

7,100 

6,280 

5,580 

4,990

4,470 

4,110 

3,780 

3,500 

3,320

3,590 

3,330 

3,460 

3,140 

2,970

3,040 

2,740 

2,500 

2,360 

2,260

2,170 

2,470 

5,200 

8,730 

18,500

18,800 

13,400 

10,500 

9,090 

9,120 

7 860

650 

690 

650 

690 

690

740 

790 

890 

1,000 

11,400

13, 100 

8,770 

7,470 

5,270 

6,830

5,270 

4,160 

4,160 

3,950 

3,850

8,400

8,770 

7,210 

10,900 

12,700

Sept.

9,550 

12,500 

9,860 

7,620 

6,240

5,220 

4,570 

4,070 

3,680 

3,480

3,240 

3,060 

2,860 

2,780 

2,660

3,580 

4,510 

5,430 

6,360 

7,280

8,690 

8,140 

8,310 

16,100 

26,000

30,100 

32,800 

35,400 

35,700 

22,200

10,100 

8,510 

6,950 

5,750 

5,630

5,990 

5,510 

4,820 

4,270 

4,490

8,510 

17,600 

18,900 

15,900 

12,900

11,000 

8,380 

6,590 

5,270 

4,380

3,750 

3,350 

3,050 

2,780 

2,510

2,330 

2,240 

2,060 

1,970 

1,810

NOTE. Mar. 30 to Apr. 1,1919, gage heights partly estimated. Sept. 16-19, Nov. 16-21,1919; July 4 and 

11,1920, discharge interpolated. Discharge estimated, Aug. 21-27,1920; partly estimated, owing to incomplete records, Nov. 22,1919; May 8, June 4, 5, 12, 19, 20, 25, 26, July 3, 4, 10-12, and Aug. 28,1920.
44 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

46 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of North Concho River at San Angela, Tex., for the 

years ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5... ..........

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

1919-20. 

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

2..............

3..............

4..............

5..............

6...........

7..............

8..........

9..............

10...........

11.. .......

12........... .

13..............

14. ..........

15.. ....

16.. ... .

17...........

18...........

19..............

20..............

21............ .

22........ .

23...........

24..........

25............

26...........

27..............

28........... ..

29..............

30...........

31..............

Oct.

0 

0 

0 

0 

0

0 

0 

0 

0 

1,420

580 

715 

64 

.1

0

0 

0 

0 

0 

4.5

4,580

1,500

228 

117 

80

760 

1,810

335 

80 

1.9

.4

9.8 

8.5 

5.3 

4.5 

3.9

3,680 

4,840 

2,630 

1,060 

580

294 

47 

47 

465 

305

117

80 

41 

73 

80

150

252 

252 

252 

64

.47 

41 

33

26

22 

22

Nov.

0.4 

0 

0 

0 

0

0 

257 

398 

138 

64

22 

9.8 

4.5 

1.9

1.9 

1.9

22 

22 

22 

22 

 22

22 

22 

22 

22 

22

22 

22 

19 

14 

14

14 

14 

14 

14 

14

14 

19

22 

22 

22

22 

22 

22 

22 

22

Dec.

22 

22 

22 

22 

22

22 

22 

22 

22 

22

22 

22 

22 

22 

22

22 

22 

22 

22 

22

22 

22 

22 

22 

22

22 

22 

22 

22 

22 

22

Jan.

1.7 

1.7 

1.7 

1.9

2.5

2.9 

4.9 

6.2

6.2 

5.8

5.3 

5.3 

6.2 

5.3 

5.3

4.5 

4.5 

5.8

6.2

5

0

22 

22 

22 

22 

22

22 

22 

22 

22 

22

22 

22 

22 

22 

22

22 

22 

9.8 

9.8 

9.8

9.8 

22 

22 

22 

22

22

9.8 

9.8 

9.8 

9.8 

9.8

Feb.

5.3 

5.3 

5.3 

4.9 

4.5

4.5 

4.5 

3.9 

3.9 

3.9

3.9 

3.9 

3.9 

3.9 

3.9

3.9 

3.9 

3.9 

3.9 

3.2

3.2 

3.5

2.7 

2.7 

2.7

2.5 

2.3 

2.3

9.8 

9.8 

9.8 

9.8 

9.8

9.8 

9.8 

9.8 

9.8 

9.8

9.8 

9.8 

9.8 

9.8 

9.8

9.8 

9.8 

9.8 

9.8 

9.8

9.8 

16 

16 

16 

16

16 

16 

16 

16

Mar.

2.3 

2.3 

2.3 

2.3 

2.3

2.3 

2.3 

2.3 

1.9 

1.9

1.9 

1.7 

1.7 

1.7 

1.7

1.7 

1.7 

1.7 

1.7 

1.7

1.7 

1.7 

1.7 

1,410 

2,430

252 

117 

98 

47 

47 

117

16 

16 

16 

16 

16

16 

16 

16 

16 

16

16 

16 

16 

16 

16

16 

16 

16 

14 

14

14 

12 

12 

12 

11

9.8 

9.8 

4.5 

4.5 

9.8 

8:5

Apr.

158 

252 

2.740 

465 

305

228 

117 

98 

47 

47

41 

36 

36 

36 

33

31 

31 

31 

31 

31

31 

31 

31 

31 

31

31 

33 

31 

31 

31

6.6 

6.6 

6.6 

6.6 

9.8

9.8 

9.8 

9.8 

9.8 

9.8

8.5 

8.5 

8.5 

8.5 

8.5

8.5 

7.2 

6.6 

6.6 

6.6

6.6 

5.3 

4.5 

4.5 

4.5

4.5 

4.5 

4.5 

4.5 

4.5

May.

31 

31 

31 

31

28

26 

41 

36 

36 

36

14 

14 

9.8 

12 

5.3

3.9 

2.3 

2.3 

41

26

6.6 

4.5 

2.9 

2.9 

1.9 

1.3

4.5 

4.5 

4.5 

4.5 

1.3

.9 

.9 

.9 

.9 

9.8

9.8 

4.5 

2.9 

1.9 

1.9

1.9 

1.9 

1.9 

1.9 

1.9

1.9 

1.9 

1.9 

1.9 

1.9

1.9 

1.9 

1.9 

1.9 

1.9 

1.9

June.

1.7 

1.3 

1.1 

1.1

.5

.6 

1,190 

64 

3,160 

500

252 

138 

87 

33 

516

580 

138 

110 

278 

269

261 

252 

365 

195

87

54 

98 

158 

150 

98

1.9 

1.9

4.5 

4.5 

2.9

1.9 

1.9 

1.9 

1.9

I" 1.3

.9 

.9 

.9 

.9 

.6

.4 

.4 

.4 

60 

24

13 

7.5

18 

7.5 

7.5

7.5 

7.5 

5.9 

4.9 

4.9

July.

98 

47 

26 

70 

98

87 

47 

688 

158 

9.8

22 

24 

11 

9.8

7.2

4.5 

3.2 

1.9 

1.9 

1,060

305 

80 

33

22 

9.8

6.6 

4.5 

3.9 

2.9 

1.9 

1.9

4.9 

3.3 

3.3

1.8 

1.8

.8 

.8 

.5 

.4 

.4

.4 

.4 

.4

.2 

.2

.2

.1 

.1 

.1 

.1

.1 

.1 

0 

0 

0

0 

0 

0 

0 

0

Aug.

1.7 

.9 

1.3 

1.9 

1.7

.9 

.6 

.3 

.2 

.1

.1 

0 

0 

0 

0

0 

0 

0 

0 

0

0 

0 

0.1

228

278 

228 

98 

64 

22 

9.8

0 

0 

4.1 

1.2

.8

.4 

.4 

.4 

.3 

.3

.3

1 

24 

4.1 

50

66 

540 

231 

7.5 

4.9

4.9 

13 

9.6 

102 

36

24 

14 

9.2 

4.5 

4.5 

1.9

Sept.

9.8 

4.5 

2.3 

.8 

.2

0 

0 

0 

0 

0

0 

0 

0 

0 

0

47

500 

158 

80 

47 

9.8

12

14 

9.8 

9.8 

9.8

1.9 

3.5

1.7 

1.4 

1.5

1.4

2.5 

3.6 

4.7 

5.8

6.9 

7.9 

6.6 

4.5 

14

16 

9.8 

6.2 

3.9 

2.5

1.7 

1.3 

1.1

.8 

.5

.4 

.4 

.4 

.3 

.3

NOTE. Gage readings Nov. 17, 1918, to Jan. 10, 1919, unreliable; mean discharge probably not over 

2 second-feet. Discharge, May 11-15, 1919, estimated 30 second-feet; Sept. 17-20, 1919, 200 second-feet. 

Discharge interpolated for following days: June 20, 21, Nov. 8, 9, 1919; Jan. 1, 2, and Sept. 7-11, 1920. 

Discharge, Sept. 6 and 12,1920, partly estimated; gage-height record incomplete. Records below 5 secondfeet in 1919 subject to uncertainty owing to unreliability of gage readings.
COLORADO RIVER BASIN. 47

Monthly discharge of North Concho River at San Angela, Tex., for the years ending

Sept. 30, 1919 and 1920.

Month.

1918-19.

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

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

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

1919-20.

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

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

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

Discharge in second-feet.

Maximum.

4,580 

398 

6.2 

5.3 

2,430 

2,740 

41 

3,160 

1.060 

278

4,840 

22 

22 

22 

16 

16 

9.8 

9.8 

60 

4.9 

540 

16

4,840

Minimum.

0 

0 

1.7 

2.3 

1.7 

31 

1.3 

.5 

1.9 

0 

0

3.9 

14 

22 

9.8 

9.8 

4.5 

4.5 

.9 

.4 

0 

0 

.3

0

Mean.

396 

56.2 

4.46 

3.79 

147 

170 

20.2 

301 

95 

30.2 

57.2

501 

19.7 

22 

18.5 

11.5 

13.7 

7.04 

2.71 

6.61 

.66 

37.4 

3.78

54.4

Run-off in 

acre-feet.

24,300 

1,780 

186 

210 

9.040 

10, 100 

1,240 

17,900 

5,840 

1,860 

3,400

30,800 

1,170 

1,350 

1, 140 

662 

842 

419 

167 

393 

39 

2,300 

225

39,500

CONCHO RIVER NEAR SAN ANGELO. TEX.

LOCATION. Half a mile below confluence of North Concho and South Concho rivers, 

If miles southeast of San Angelo, Tom Green County.

DRAINAGE AREA. 10,800 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of United States Geological Survey; scale, 1 inch =25 miles).

RECORDS AVAILABLE. September 17, 1915, to September 30, 1920.

GAGE. Stevens continuous water-stage recorder, installed August 9, 1917, on right 

bank, 1,500 feet below an old ford; inspected by engineers of United States Geological Survey. Prior to August 9, 1917, a vertical staff gage in several sections 

attached to trees on left bank was used. Water-stage recorder and vertical staff 

gage referred to same datum.

DISCHARGE MEASUREMENTS. Made by wading or from cable near gage.

CHANNEL AND CONTROL. Bed composed of solid rock and gravel. Channel straight 

for 1,000 feet above and below station. Right bank high, rocky, wooded, and not 

subject to overflow; left bank of medium height, composed of clay and gravel, 

covered with a scattered growth of trees, and subject to overflow at high stages. 

Rapids just below gage serve as control for medium and low stages; control for 

high stages not known.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30,1919, 26.6 feet July 8, determined from flood marks on gage house (discharge, 

40,500 second-feet, determined by slope method, assuming a value of 0.045 for n 

in Kutter's formula); minimum stage, 0.45 foot at 4 p. m. October 6 (discharge, 

0.1 second-foot).

Maximum stage during year ending September 30, 1920, from water-stage 

recorder, 18.52 feet at 3 p. m. October 6(discharge, about 14,500second-feet); 

minimum stage, 0.50 foot at midnight July 24 (discharge, 1.8 second-feet).
48 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

1915-1920: Maximum stage recorded, 26.6 feet July 8, 1919, determined from 

flood marks on gage house (discharge, 40,500 second-feet, determined from slope 

method, assuming a value of 0.045 for n in Kutter's formula); minimum discharge, 

0.1 second-foot at 4 p. m. October 6, 1918.

ICE. None.

DIVERSIONS. Flow at low stage materially affected by diversions above station. 

About a mile above mouth of South Concho River a storage dam has been constructed by the San Angelo Light & Power Co. for waterworks. Records of the 

Board of Water Engineers for the State of Texas show that about 7,500 acres have 

been declared irrigated by water above the station, and about 3,500 acres by diversions below station.

REGULATION. Storage at the dam of the San Angelo Light & Power Co. has slight 

effect on flow at station; no regulation of consequence on North Concho River.

ACCURACY. Stage-discharge relation practically permanent, except when affected by 

aquatic growth on control. Rating curve well denned below 800 second-feet; 

above, it is based on determination of discharge (40,500 second-feet), at crest of 

flood on July 8, 1919, using Kutter's formula with the value of 0.045 for n, and is 

subject to error. Between 800 and 40,500 second-feet curve was drawn with 

discharge as a function of A\/d. Operation of water-stage recorder unsatisfactory 

as indicated in footnote to daily-discharge table. Daily discharge ascertained 

by applying to rating table mean daily gage height, determined by inspecting 

gage-height graph, or for days of considerable fluctuation by use of planimeter, 

or by indirect method for shifting control during periods when aquatic growth 

affected stage-discharge relation or as otherwise noted in footnote to daily-discharge 

table. Records good for low and medium stages and poor for high stages.

Discharge measurements of Concho River near San Angelo, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 7

1919.

Jan. 11

May 14

20

July 8

Made by 

Kinnison and Gowans. .

J. E. Powers...........

C. E. Ellsworth........

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

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

Gage 

height.

Feet. 

0.60

1.28

1.73

2.26

3.47

26 60

1.38

Discharge.

Sec.-ft. 

1.6

28.8

95.5

240

790

040,500

39.0

Date.

1920. 

Nov. 15

Mar. 24

May 27

July 7

Made by 

D. A. Dudley ..........

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

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

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

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

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

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

Gage 

height.

Feet. 

1.64

1.74

1.63

1.28

.99

3.22

.66

2.39

Discharge.

Sec.-ft. 

78.0

93.8

71.5

32.9

16.7

6586

4.50

290

<* Discharge determined by slope method, using a value of 0.045 for »in Kutter's formula, 

b Made during falling stage
COLORADO EIVEE BASIN. 49

Daily di , in second-feet, of Concho River near San Angela, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

1.........

2.........

3.........

4. ........

5.........

6.........

7.........

8.........

9. .........

10. .........

11..........

12.........

13..........

14..........

15..........

16..........

17..........

18..........

19..........

20..........

21..........

22....... ..

23..........

24..........

25..........

26. .........

27..........

28. ........

29..........

30..........

31..........

1919-2C. 

1... .......

2..........

3..........

4....... .

5..........

8..........

7..........

8.......

9....... .

10..........

11.........

12..........

13....... .

14....... .

15..........

18.........

17..........

18..........

19. .........

20. .........

21..........

22....... ..

23..........

24........ .

25..........

28..........

27..........

28. .........

29..........

30..........

31..........

Oct.

0.7 

1.0

.8 

.8 

.7

.6 

1.5 

1.3 

1.4 

1,620

1,780 

724 

152 

82 

37

33

38 

29 

19 

368

4,680 

2.460 

752 

352 

204

886 

1,840 

626 

304 

194 

152

84 

82 

78 

78 

74

8,430 

8,800

2,380 

608 

418

404 

424 

265

Nov.

134 

122

108 

90 

84

78 

404 

544 

154 

76

15 

14 

12 

11 

9.5

8.3 

7.9 

7.9 

8.3 

7.9

6.8 

7.4 

7.9 

9.1 

10

10 

11 

12 

12 

13

120 

101

84

82 

80 

78 

80 

82

86 

82 

80 

78 

79

82 

90 

99 

84 

78

70 

72 

92 

86 

80

Dec.

14 

14 

18 

19

30

74 

70 

74

78 

82

82 

84 

84 

80 

80

82 

84 

80 

82 

82

86 

88 

92 

97 

92

90 

86 

84 

80 

80

80 

80 

78 

80 

80 

78

Jan.

30

25 

22 

24 

26

38 

44 

41 

37 

36

134 

132 

60 

45 

39

38 

38 

38 

37 

37 

37

78 

80 

82 

80 

99

99

97 

90 

84 

84

112 

112 

101 

92 

90

88 

86 

84 

84 

88

78 

97 

97 

92 

90

90 

88 

88 

90 

90 

92

Feb.

35

29 

31 

31

33

42 

28 

24 

24

25 

24 

24 

25 

22

24 

21 

21 

22 

21

21 

21 

19

92 

92 

92 

92 

92

94 

94 

92 

90 

94

94 

101 

101 

97 

92

88 

88 

88

88 

88

88 

88 

86 

84 

80

80 

84 

82 

80

Mar.

20 

23 

51 

42 

35

28 

6.8 

3.8 

3.0 

3.4

3.3

3.7 

3.8 

4.0 

4.0

4.0 

4.7 

3.8 

8.3 

3.8

4.0 

5.2 

5.5

837 

3,970

1,730 

508 

230 

130 

101 

186

80 

70 

87 

65 

59

60 

65 

65 

84 

70

82 

53 

54 

51 

39

35 

33 

33 

33 

37

34 

38 

45 

62 

41

38 

39 

33 

38 

37 

38

Apr.

160 

108 

2,020 

980 

272

146 

94 

74 

67 

51

48 

38 

33 

33 

27

23 

22 

21 

21 

20

21 

21 

20 

18 

18

19 

25

27 

27 

25

35 

34 

38 

37 

39

35 

33 

35 

31

35

30 

23 

22 

22

26

22 

24 

22 

19

18

18 

14 

12 

18 

19

19 

17 

15 

13 

12

May.

23 

21 

19 

18 

50

42 

57 

194 

103

57

536 

1,000 

300 

122

74

64 

46 

49 

67 

37

29 

28 

26 

1,340 

438

152 

92 

70 

82

57 

50

12 

12 

12 

12 

12

10 

12 

12 

11

26

18 

18 

16

18 

18

19 

18 

18 

18 

18

14 

13 

17 

22

18

20 

18 

11 

14 

14 

12

June.

46 

49 

46 

33 

32

29

801 

185 

13,750 

6,300

1,600 

480 

258 

188 

680

1,910 

500 

298 

332 

580

464 

598 

1,650 

684 

440

440 

1,850 

1,530 

738 

734

10 

14 

12 

15 

22

44 

37 

28 

20 

14

15 

12 

18 

22 

16

12 

18 

9.1 

424 

152

68 

50 

1,300 

278 

108

80 

87 

53 

45 

30

July.

945

86 

78 

74 

87

22 

14 

10 

12 

14

8.6 

3.5 

3.8 

4.0 

3.5

3.7 

5.0 

3.7 

3.5 

3.1

2.5 

3.0 

2.3 

2.5 

2.5

2.4 

2.4 

2.3 

2.1 

2.0

2.4 

2.4 

2.4 

2.3 

2.5 

2.4

Aug.

57 

46 

38 

37 

31

16 

12 

6.6

4.5 

4.0

! 244 

j 88 

37 

18 

5.0

3.1 

2.7 

3.3 

3.7

738

227 

272 

424

78 

204

380

178 

88 

97 

64 

44

2.2 

5.7 

10 

4.2 

3.7

3.4 

3.3 

2.8 

2.5 

2.4

2.4 

35 

214 

53 

227

288 

468 

140 

67 

49

82 

608 

576 

742 

223

127

94

[so

Sept.

34 

28 

21 

19 

17

10 

8.3 

7.9 

7.6 

7.9

7.9 

7.6 

6.0 

4.2

86

774 

404 

316 

97 

76

630 

516 

792 

251 

149

117 

103 

94 

92 

90

80 

251 

122

82

88

92 

140 

188 

149 

105

60

50 

50 

4&

44 

44 

45- 

42

40'

NOTE. No record Oct. 14 to Nov. 7, 1919 (discharge ranged between 3,530 and 74 second-feet as showa 

by maximum, and minimum gage heights). Discharge partly estimated owing to breaks in record: Nov. 

8, 21, Dec. 2, and 4,1919; Aug. 27, Sept. 2, 10, and 18,1920. Discharge interpolated Nov. 20 and Dec. 3,. 

1919. Indirect method for shifting control used during the following periods: Oct. 1-9, 1918; Mar. 28 to 

Aug. 11, and Sept. 18-30,1920. Braced figures show estimated mean discharge for periods included.
50 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Monthly discharge of Concho River near San Angela, Tex., for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

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

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

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

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

1919-20.

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

Discharge in second-feet.

Maximum.

4,680 

544

134

3,970 

2,020 

1,340 

6,300 

738 

774

6,800 

120 

97 

112 

101 

80 

39 

26 

1,300 

22 

742 

251

Minimum.

0.6 

6.8

i9

3.0 

18 

18 

29 

2.7 

4.2

74 

70 

70 

78 

80 

33 

12 

10 

9.1 

2.0 

2.2

Mean.

559 

66.5 

28.2 

40.6 

27.8 

256 

149 

168 

907 

111 

159

1.390 

84.5 

82.2 

90.3 

89.6 

49.5 

24.5 

15.3 

99.6 

4.86 

140 

76.0

Run-off in 

acre-feet.

34.400 

3,960 

1,730 

2,500 

1,540 

15,700 

8,870 

10,300 

54,000 

6,820 

9,460

35,800 

3,850 

5,050 

5,550 

5,150 

3,040 

1,460 

941 

5,930 

299 

8,610 

4,520

CONCHO RIVER NEAR PAINT ROCK, TEX.

LOCATION. At Concho, San Saba & Llano Valley Railroad bridge a quarter of a mile 

below mouth of Kickapoo Creek and 2 miles northwest of Paint Rock, Concho 

County.

DRAINAGE AREA. 11,800 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. September 20, 1915, to September 30, 1920.

GAGE. Stevens continuous water-stage recorder attached to downstream end of 

middle pier of railroad bridge, installed September 16,1920, inspected by engineers 

of United States Geological Survey. Prior to September 16, 1920, gage was 

vertical staff, attached to same pier; read by Oscar Skaggs.

DISCHARGE MEASUREMENTS. Made by wading or from downstream side of bridge.

CHANNEL AND CONTROL. Bed composed of solid rock, smooth, clean, free from vegetation, and permanent. Channel straight for 500 feet above and below gage. 

Right bank 30 feet high, solid rock, clean, and not subject to overflow; left bank 

of medium height, sloping, wooded, and subject to overflow during high water. 

Permanent control during low and medium stages at a shoal in solid rock, 400 

feet below gage.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 13.5 feet at 7.30 a. m. June 10 (discharge, 21,300 second-feet); no flow, 

October 1-9.

Maximum stage recorded during year ending September 30, 1920, 12.0 feet 

at 9.30 a. m. October 7 (discharge, 16,900 second-feet); minimum stage, 0.80 foot, 

August 1-5 (discharge, 0.80 second-foot).

1915-1920: Maximum stage recorded, 13.5 feet at 7.30 a. m. June 10, 1919 (discharge, 21,300 second-feet); no flow during periods of every year except J920.

TOE. None.
COLORADO RIVER BASIN. 51

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show 

that about 11,000 acres have been declared irrigated by diversions from Concho 

River, practically all of which are above the station. Flow during low stages 

is materially affected by diversions.

REGULATION. Ten storage dams of small capacity are located between this station 

and San Angelo. An abandoned dam, 12 feet in height, known as "Four-Mile 

dam," is 4 miles below San Angelo, and a small dam, 8 feet in height, has been 

constructed for storage on Sims ranch just above the station. None of the dams 

appreciably affect the flow by storing water, except during extremely low stages.

ACCURACY. Stage-discharge relation permanent. Rating curve well defined below 

1,000 second-feet; fairly well denned between 1,000 and 6,000 second-feet, and 

extended above. Gage read to hundredths once a day to September 7, 1920. 

No record September 8-15; discharge interpolated. September 16-30, Stevens 

water-stage recorder; operation satisfactory. Daily discharge ascertained by 

applying mean daily gage height to rating table, except as noted above. Records 

good except for extremely high stages.

Discharge measurements of 'Concho River near Paint Rock, Tex., during the years, ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 5

1919.

Jan. 9

May 13

Aug. 6 

Nov. 12

Made by 

Dudley and Twichell. . .

Gage 

height.

Ft.

1.38

2.70

1.33

1.78

Discharge.

Sec.-ft. 

0

31.3

457

23 

98 6

Date.

1920.

July l

Sept. 17

Made by1} \ Dudlev

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

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

Sage 

height

Ft.

1.78

1.28

1.48

1.64

Discharge.

Sec.-ft. 

104

19.0

42.0

72.2

Daily discharge, in second-feet, of Concho River near Paint Rock, Tex., for the years 

ending Sept. 30, 1919 and 19"20.

Day.

1918-

19.

1....

2....

3....

4....

5....

6....

7....

8....

9....

10...-

11....

12....

13....

14....

15....

16....

17....

18....

19....

20....

21....

22....

23. ...

24....

25. ...

26....

27....

28. ...

29....

30....

31....

Oct.

0

0

0

0

0

0

0

0

0

3,480

5. 320

1,280

600

360

58

44

36

30

28

26

5,240

6,810

1,540

963

600

500

2,240

900

600

360

165

Nov.

66

58

55

51

44

38

7,240

2.030

333

315

295

130

44

41

36

33

30

28

26

24

22

20

19

25

24

23

22

21

21

20

Dec.

20

19

19

19

20

20

20

21

21

21

21

21

21

21

21

21

30

75

53

44

37

37

37

37

37

37

37

37

37

37

62

Jan.

44

30

29

28

28

28

28

28

28

27

26

26

25

30

38

37

34

41

41

38

38

1,200

153

79

68

55

44

49

46

43

38

Feb.

37

165

70

62

58

55

49

55

43

38

30

28

26

25

37

41

38

33

29

25

24

23

22

22

21

21

20

20

Mar.

19

19

18

44

38

34

30

29

19

12

11

9.2

7.5

6.5

5.5

5.1

4.6

4.1

3.8

3.6

3.4

4.8

4.6

2,300

7,210

2,820

1,580

970

191

159

98

Apr.

79

441

5,620

2.460

432

113

103

98

70

62

57

4,220

44

33

26

23

19

17

16

15

13

12

11

9.2

6.8

4.8

4.3

44

20

500

May.

159

30

20

19

16

13

11

8.2

7.5

6.8

2,820

1,500

235

108

672

275

62

30

900

600

198

34

30

11,400

1,540

235

108

83

44

44

44

June.

37

37

37

37

37

37

235

500

8,010

15,200

3,810

500

275

182

150

4,340

500

275

900

450

600

660

4,690

810

900

235

4,160

1,200

1,720

1,280

July.

720

315

235

165

135

108

83

30

7,210

1,720

720

315

165

156

135

122

108

100

96

3,480

970

550

198

165

135

108

100

96

88

81

75

Aug.

68

62

53

40

30

24

19

13

12

10

7.9

7.9

4.8

.1

.1

.1

4.8

13

8.2

4.8

.8

108

810

360

108

900

550

405

165

4.8

30

Sept.

29

29

28

27

26

25

23

21

20

19

19

17

16

16

.16

1,450

1,120

525

165

150

575

600

900

525

235

165

135

122

96

62
52 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Concho River near Paint Rock, Tex.,for the years 

ending Sept. SO, 1919 and 1920 Continued.

Day.

1919-

20.

1.,..

2....

3....

4..'..

5....

6....

7....

8....

9....

10....

11 ...

12....

13....

14....

15....

16....

17....

18....

19....

20. ...

21....

22....

23....

24....

25....

26....

27. ...

28....

29....

30....

31....

Oct.

..-.. 62

62

53

44

37

8,010

12,700

7,690

840

500

500

405

360

275

198

159

441

315

191

165

275

6,410

1,450

970

387

198

185

159

135

119

108

Nov.

182

165

153

141

130

119

108

575

360

159

122

103

100

98

96

106

106

103

103

103

103

106

106

106

103

103

103

100

108

108

Dec.

108

108

108

108

106

103

103

103

103

103

100

98

96

96

96

103

103

103

103

108

106 roe

100

93

88

93

90

86

83

83

83

Jan.

83

81

81

79

113

108

106

100

98

98

103

106

106

124

122

113

108

103

96

96

96

122

113

108

98

96

96

108

103

98

93

Feb.

98

98

98

98

98

98

98

103

103

103

103

100

100

100

100

98

93

88

88

88

88

86

83

83

83

83

83

83

79

Mar.

77

77

75

72

72

72

70

70

68

68

66

66

62

55

51

44

43

41

38

37

36

36

34

34

62

58

51

34

30

28

25

Apr.

24

23

22

20

20

19

19

19

16

12

12

25

22

19

16

13

11

11

11

11

11

11

11

11

11

11

11

11

11

11

May.

11

11

11

11

11

11

9.6

9.2

9.2

9.2

9.2

9.2

9.2

9.2

9.2

20

17

16

15

14

16

16

15

14

13

13

13

12

12

12

12

June.

14

14

14

17

16

16

16

26

26

23

20

19

14

13

14

13

12

14

13

275

108

62

2,240

840

235

119

83

70

58

48

July.

40

30

20

16

13

12

11

10

11

11

11

11

10

10

9.2

8.2

8.2

8.2

8.2

10

9.2

8.2

8.2

7.5

7.5

7.5

6.2

3.8

2.1

1.4

1.4

Aug.

0.8

.8

.8

.8

.8

9.2

4.8

3.4

2.4

1.8

1.4

6.2

6.8

243

1,630

780

291

165

119

83

62

44

378

1,280

550

251

135

108

9688 '

79

Sept.

75

98

220

135

135

108

103

101

98

96

93

91

89

87

85

83

75

66

57

51

49

46

44

44

4S

41

38

37

37

43

Monthly discharge of Concho River near Paint Rock, Tez., for the years ending Sept. SO,

1919 and 1920.

Month

1918-19. 

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

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

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

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

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

1919-20.

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

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

Discharge in second-feet.

Maximum.

6,810 

7,240 

62 

1,200 

165 

7,210 

5,620 

' 11,400 

15,200 

7,210 

900 

1,450

15,200

12,700 

575 

108 

124 

103 

77 

24 

20 

2,240 

40 

1,630 

220

12,700

Minimum.

0 

19 

19 

25 

20 

3.4 

4.3 

6.8 

37 

30 

.1 

16

0

37 

96 

83 

81 

79 

25 

11 12' 9 2

1.4

.8 

37

.8

Mean.

1,010 

371 

31 

79 

40 

505 

486 

686 

1,730 

603 

123 

239

493

1,400 

139 

99 

102 

93 

53 

15 

12 

U8 

11 

207 

79

198

Run -off in 

acre-feet.

62,100 

. 22, 100 

1,910 

4,860 

2,220 

31,100 

28,900 

42,200 

103.000 

37,100 

7,560 

14,200

357,000

86,100 

8,270 

6,090 

6,270 

5,350 

3,260 

892 

738 

8,810 

676 

12,700 

4,700

U3,000
COLORADO RIVER BASIN. 53

SAN SABA RIVER AT MENARD, TEX.

LOCATION. At steel highway bridge in Menard, Menard County, 80 miles above 

mouth of stream.

DRAINAGE AREA. 1,140 square miles (measured on standard topographic maps; postroute map; and topographic map of Texas, compiled in 1899 by Robert T. Hill. 

of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. September 14, 1915, to September 30, 1920.

GAGE. Chain gage attached to floor on downstream side of highway bridge; read by 

W. H. and W. A. Cannon or H. E. Jones.

DISCHARGE MEASUREMENTS. Made by wading or from downstream side of bridge.

CHANNEL AND CONTROL. Channel straight 800 feet above and 100 feet below station; 

waiter flows through a series of shoals and ponds; channel above gage somewhat 

obstructed by reeds and grass, but below the gage the flow is only slightly obstructed at times. Right bank composed of gravel and clay, wooded, sloping, 

high, and not subject to overflow; left bank similar, but low and subject to overflow. A sand and gravel ford just below gage forms a fairly permanent control 

during low stages, but shifts during medium and high stages.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30,1919,13.05 feet at 8.45 a. m. November 8 (discharge not determined); minimum 

discharge, 4.8 second-feet, October 8.

Maximum stage recorded for year ending September 30, 1920, 7.5 feet at 7.10 

a. m. August 24 (discharge not determined); minumum discharge, 11 second-feet 

at 6.20 p. m. July 12.

1915-1920: Maximum stage recorded, 13.6 feet at 2.30 a. m. September 16, 1915 

(discharge not determined1); no flow July 12-14, 19-31, Aug. 1-4, and 26-31, 1918.

ICE. None.

DIVERSIONS. Considerable land is irrigated with water diverted above station. 

Noyes canal on right side of river which serves a considerable area diverts a short 

distance above gage. Records of the Board of Water Engineers for State of Texas 

show that about 4,300 acres have been declared irrigated by diversions above the 

station, and about 7,700 acres by diversions below the station.

REGULATION. Flow unregulated by storage or water-power plants but is largely controlled at low stages during irrigation season by diversion to Noyes canal.

ACCURACY. Stage-discharge relation not permanent. Rating curve for 1919 fairly 

well denned below 110 second-feet; curve for 1920 fairly well denned between 

25 and 250 second-feet extended above. Gage read to hundredths twice daily. 

Daily discharge determined by applying mean daily gage height to rating table, 

except as noted in footnote to daily-discharge table; indirect method for shifting 

control used, October 1, 1919, to September 30, 1920. Records fair below 150 

second-feet and poor above.

Discharge measurements of San Saba River at Menard, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 5

1919.

May 17

18

Nov. 17

Made by 

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

Gage 

height.

Feet. 

1.96

2.07

2.56

2.29

2.26

Discharge.

Sec.-ft. 

20.8

39.1

109

60.1

36.1

59.1

Date.

1920 . 

Jan. 20

Mar. 6

26

Apr. 24

Made by 

D. A. Dudley. ........

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

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

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

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

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

Gage 

height.

Feet. 

2.18

2.03

2.06

2.20

2.04

Discharge.

Sec.-ft. 

46.3

28.3

28.3

37.7

31.8

58.8
54 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of San Saba River at Menard, Tex.,for the years ending

Sept. -30, 1919 and 1920.

Day.

1918-19. 

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

2.............

3.............

4.............

5.............

6.............

7.............

8.............

9.............

10.............

11.............

12.............

13.............

14.............

15.............

16.............

17.............

18.............

19.............

20.............

21.............

99

23.............

24.............

25.............

26..............

27.............

28..............

29..............

30..............

31..............

1919-20. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20. .............

21..............

22..............

23..............

24..............

25..............

26..............

27. .............

28..............

29..............

30..............

31..............

Oct.

17

18

15

12

20

16

6.4

48

8.0

28

393

138

37

27

24

21

24

19

21

22

27

27

22

22

21

33

35

22

18

14

21

39

40

40

40

41

39

39

39

40

39

40

41

39

40

41

43

49

47

41

40

38

39

39

10

39

39

41

41

44

41

41

Nov.

22

23

23

24

23

25

25

160

91

48

37

48

40

39

42

40

38

41

38

40

38

40 55

49

45

40

39

41

41

43

41

40

40

42

41

42

45

49

52

54

56

56

56

56

56

56

58

58

56

58

56

56

56

56

56

56

56

Dec.

40

37

36

38

34

36

32

32

31

33

36

38

42

40

39

38

34

33

40

49

36

40

44

49

40

42

39

38

38

36

34

55

54

54

54

54

54

55

54

54

54

54

54

54

54

52

44

42

42

42

42

42

44

42

42

42

42

43

42

44

44

44

Jan.

36

36

32

32

31

33

32

32

33

34

29

35

34

41

45

42

39

38

37

40

37

38

38

38

38

38

48

41

39

39

39

43

43

43

44

43

43

44

43

43

43

43

44

44

43

43

40

40

38

39

40

38

38

39

40

40

40

42

42

44

42

44

Feb.

39

39

39

40

39

40

41

40

40

39

40

39

39

40

40

39

40

40

40

39

39

40

40

40

39

40

40

39

42

44

44

44

44

44

44

44

43

42

42

43

41

41

43

43

42

43

43

44

42

44

44

43

42

43

43

42

42

Mar.

39

40

39

40

40

39

39

40

39

29

23

24

23

24

25

24

24

24

25

23

24

25

25

25

26

25

25

26

26

26

25

40

37

37

35

31

28

28

29

27

29

29

28

28

28

26

26

27

27

28

27

28

26

28

26

26

26

28

72

29

31

33

Apr.

27

27

27

27

27

26

27

27

26

28

28

28

28

28

28

28

28

28

28

28

28

26

28

28

27

28

26

26

27

26

29

29

29

29

29

31

31

31

30

32

30

32

32

32

30

30

31

39

40

38

38

38

38

38

39

38

38

38

37

39

May.

27

28

27

27

26

27

27

27

26

26

27

27

26

25

26

212

45

36

29

26

27

25

26

27

24

25

25

26

26

27

39

37

37

34

33

33

33

32

32

32

29

26

26

26

26

26

26

26

27

26

27

28

28

28

28

27

28

28

29

28

30

June.

25

27

25

26

25

25

25

112

45

34

25

27

25

27

35

112

89

70

114

82

153

48

64

58

59

58

31

32

33

32

33

33

33

33

33

33

33

33

35

34

34

36

35

34

35

42

47

47

47

45

46

48

49

46

46

46

July.

59

58

61

58

59

58

402

422

71

52

52

47

46

45

45

45

47

45

46

47

54

47

47

47

44

42

45

44

41

40

41

47

45

43

39

38

40

40

42

43

57

52

18

22

21

22

21

23

21

29

31

27

26

22

26

26

27

28

31

29

29

35

Aug.

41

42

42

40

42

42

42

42

42

42

42

41

42

44

42

42

42

42

42

42

44

49

47

42

42

45

45

44

45

42

42

38

37

36

36

37

33

35

32

30

29

28

29

31

37

568

676

187

210

88

58

50

46

49

956

191

103

55

47

43

41

33

Sept.

42

44

42

40

36

36

36

36

36

38

36

37

38

38

42

66

91

58

55

56

120

40

35

34

33

33

35

31

34

33

33

33

31

32

32

32

31

31

30

29

27

27

26

26

26

30

29

29

27

37

36

38

41

39

40

49

45

NOTE. Indirect method for shifting control used during following periods: Oct. 1,1918, to May 15, June 27 

to Sept. 21, 1919. Discharge for following days was not determined because stage as given was beyond 

limits of rating curve: Nov. 8,1918,13.05 feet; Nov. 9,3.96 feet; May 16,1919,6.50 feet; June 9,4.27 feet; June 

22, 4.79 feet; June 25,7.27 feet; June 26, 4.29 feet; Sept. 22, 9.45 feet; Sept. 23, 8.75 feet; and Sept. 24, 1919, 

3.80 feet.
COLOEADO RIVER BASIN. 55

Monthly discharge of San Saba River at Menard, Tex., for the years ending Sept. 30,1919

and 1920.

Month.

1918-19. 

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

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

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

1919-20.

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

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

Discharge in second-feet.

Maximum.

393 

49 

48 

41 

40 

28 

422 

49

49 

58 

55 

44 

44 

72 

40 

39 

49 

57 

956 

49

956

Minimum.

4.8 

31 

29 

39 

23 

26 

40 

40

38 

40 

42 

38 

41 

26 

29 

26 

31 

18 

28 

26

18

Mean.

36.6 

37.9 

36.9 

39.6 

29.1 

27.3 

72.8 

42.7

40.6 

51.4 

48.2 

41.8 

42.9 

30.6 

33.8 

29.5 

38.1 

32.3 

125 

32.8

45.7

Run-off in

acre-feet.

2,250 

2,330 

2,270 

2,200 

1,790 

1,620 

4,480 

2,630

2,500 

3,060 

2,960 

2,570 

2,470 

1,880 

2,010 

1,810 

2,270 

1,990 

J.690 

1,950

33,200

SAN SABA RIVER NEAR SAN SABA, TEX.

LOCATION. About 200 feet above Beveridge highway bridge, 1 mile below mouth 

of China Creek, 2 miles northwest of San Saba, San Saba County, 3 miles below 

mouth of Richland Creek, and 4 miles above mouth of Simpson Creek.

DRAINAGE AREA. 3,000 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. December 30,1904, to December 31,1906; September 11, 1915, 

to September 30,1920. Miscellaneous discharge measurements previous to 1904.

GAGE. Vertical and inclined staff, on right bank; read by G. M. Pool. From December 30, 1904, to December 31, ]906, gage heights were obtained by measuring 

with a tape from a reference point on the bridge to the water surface. Relation 

between datum used 1904-1906 and that of present gage is not known.

DISCHARGE MEASUREMENTS. Made by wading or from downstream side of bridge.

CHANNEL AND CONTROL. Channel straight above and below station for 100 feet. 

Bed composed of rock and gravel; shifts. Left bank composed of gravel and clay, 

wooded, high, and not subject to overflow; right bank consists of clay and gravel, 

wooded, sloping, medium in height, and subject to overflow during high water. 

A shoal at a ford about 75 feet below gage serves as control during medium and 

low stages; control is free from vegetation and shifts.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 30.7 feet September 23 (discharge, 11,700 second-feet, determined from 

extension of rating curve; minimum stage, 1.10 feet at 6.40 p. m. October 1 and 

6.10 p. m. October 2 (discharge, 9.5 second-feet).

Maximum stage recorded during year ending September 30, 1920, 14.2 feet on 

night of October 16-17, determined from flood marks on gage (discharge, 4,340 

second-feet); minimum stage, 1.64 feet at 6.45 p. m. July 8 (discharge, 68 secondfeet).

1904-1906; 1915-1920: Maximum stage recorded, 31.7 feet August 7, 1906 (discharge not determined); no flow August 9 and 10, 1918.

ICE. None.
56 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

DIVERSIONS. Considerable water is diverted from stream and tributaries above 

station. There are also diversions below the station, but none in vicinity of 

station. Flood water from Brady Creek at Brady is stored for municipal uses; 

capacity of reservoir not known, but probably small. Records of the Board of 

Water Engineers for the State of Texas show that about 9,300 acres have been 

declared irrigated by diversions above station and about 2,700 acres by diversions 

below station.

REGULATION. None.

ACCURACY. Stage-discharge relation not permanent. Rating curves well defined 

between 5 and 6,500 second-feet. Gage read to hundredths twice daily. Daily 

discharge ascertained by applying mean daily gage height to rating table; 

shifting-control method used October 1, 1918, to September 30, 1919, October 13 

to December 19, 1919, and January 7 to April 20, 1920. Records fair.

Discharge measurements of San Saba River near San Saba, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct.- 10

12 

12

12

13

1919.

Jan. 13

Made by 

Kinnison and Gowans.

Kinnison and Gowans. 

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

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

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

Gage 

height.

Feet. 

4.03 

12.86

18.71 

14.71

12.42

5.17

1.89

2.75

Discharge.

Sec.-ft 

646 

3.800

o6,250 

4,690

3 un

989

96.4

Date.

1919.

Aug. 8

1920.

Mar. 2

31

July 12

Made by 

Dudley and Twichell...

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

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

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

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

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

Gage 

height.

Feet. 

2.08 

2.97

2.78

2.42

2.20

3.00

1.98

Discharge.

Sec.-ft. 

130 

356

9.4.1

181

i *ift

326

112

o Surface velocity observed over part of the section.

Daily discharge, in second-feet, of San Saba River near San Saba, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

1........ . .

2..............

3... .......

4..............

5..............

6.........

7.............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22......... . .

23..............

24. .............

25. .............

26. .............

27..............

28..............

29. .............

30..............

31..............

Oct.

16

15

17

17

16

21

21

22

21

276

3,370

6.060

834

438

214

156

112

86

72

67

58

708

1,670

567

214

143

573

230

152

92

78

Nov.

71

70

60

58

54

48

347

5,140

11,300

1,760

594

365

264

99

252

191

145

124

112

107

103

99

103

99

99

128

230

159

147

122

Dec.

116

107

101

98

94

91

92

91

91

91

88

88

88

88

88

84

86

99

249

666

449

200

4,830

741

342

233

170

147

145

Jan.

136

132

126

120

114

108

108

105

101

98

98

98

96

99

112

159

228

269

247

212

2,510

547

329

264

223

576

007

276

242

Feb.

223

223

212

198

191

200

184

175

163

156

154

150

150

145

141

136

150

177

186

184

156

1 Wl

139

128

128

126

Mar.

124

124

122

122

120

120

116

122

130

134

128

124

1.24

120

124

128

130

124

110

107

101

94

Q4.

112

209

166

147

296

168

Apr.

130

124

122

124

114

108

105

99

136

101

92

89

89

89

84

83

77

77

77

77

72

67

62

59

57

57

58

59

63

71

May.

59

52

53

53

1,060

301

218

430

132

108

512

864

1,010

249

900

2,270

1,530

609

424

1,160

344

212

166

147

182

170

205

163

108

101

June.

94

96

108

107

96

86

78

74

266

4,010

2.960

547

316

274

177

259

2,090

489

951

1,100

696

1,240

3,860

1,340

2,610

3,150

3.930

3,830

2,320

696

July532

365

329

294

257

228

221

233

311

329

257

223

186

175

163

145

141

141

126

4,430

5,490

1,440

588

403

319

269

240

223

205

195

Aug.

186

175

168

159

150

141

136

128

126

126

124

122

116

110

105

103

99

172

588

205

909

1,030

684

435

744

684

550

254

214

Sept.

202

184

170

161

152

147

143

141

136

128

126

122

118

116

342

1,630

684

304

247

1,860

242

7.730

9,160

5,830

2,160

1,330

708

558
COLOEADO EIVEE BASIN. 57

Daily discharge, in second-feet, of San Saba River near San Saba, Tex., for the years 

ending Sept. SO, 1919 and 1920 Continued.

Day.

1919-20. 

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

2..............

3..............

4..............

5..............

6............

7..............

8... ...........

9..............

10.............

11.............

12...... .

13............

14.............

15..............

16..............

17............

18..............

19..............

20............

21............

22. ...........

23. ............

24...........

25. ............

26. .............

27..............

28.............

29..............

30............

31..............

Oct.

470

384

356

343

317

330

441

651

777

530

1.400

560

456

384

356

356

3,38Q

938

713

560

470

777

2,620

1,140

620

560

560

485

456

441

456

Nov.

426

398

384

356

343

343

356

3,700

1,720

1,400

841

713

590

590

590

590

560

500

470

470

456

456

426

426

426

412

398

651

682

620

Dec.

560

500

500

456

456

456

456

441

398

370

370

370

356

356

343

330

330

330

370

370

343

330

317

317

304

292

292

292

279

279

268

Jan.

268

268

268

268

398

745

560

441

412

356

1,000

2,310

1,200

809

651

620

590

560

530

500

470

470

441

441

441

441

412

412

398

370

370

Feb.

356

356

356

343

343

343

343

343

330

330

330

426

370

330

317

328

338

348

358

268

268

268

268

268

268

256

256

244

244

Mar.

244

244

244

233

222

222

222

222

222

222

222

222

222

222

211

211

203

203

203

198

205

205

205

205

233

233

213

196

190

184

182

Apr.

184

178

174

168

174

170

176

178

174

174

172

165

165

166

170

168

165

161

152

150

148

145

148

147

154

154

141

138

129

131

May.

127

136

131

131

131

134

620

905

19£

233

398

244

188

178

184

412

268

194

166

152

150

145

139

141

139

138

138

138

134

131

134

June.

131

148

370

226

215

163

154

143

136

129

126

120

163

141

120

120

120

116

198

163

131

117

120

116

114

111

108

108

111

110

July.

102

31

88

91

85

79

75

70

145

163

122

114

129

104

91

88

91

84

85

182

132

95

95

95

89

83

79

84

168

124

124

Aug.

94

84

188

224

172

124

370

168

122

104

94

89

87

95

938

1,000

1,540

560

292

268

200

159

141

188

161

682

317

218

170

139

120

Sept.

117

129

131

141

134

134

1,270

141

127

112

104

101

96

95

92

91

91

91

99

92

- 92

89

84

83

81

83

81

85

88

85

NOTE. Discharge, Nov. 9, 1918, Sept. 22 and 23, 1919, determined from extension of rating curve and 

is subject to considerable error. Discharge, Feb. 16-19,1920, interpolated.

Monthly discharge of San Saba River near San Saba, Tex., for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

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

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

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

1919-20.

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

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

6,060 

11.300 

4,830 

2,510 

223 

2,000 

136 

2,270 

4,010 

5,490 

2,950 

9,160

11,300

3,380 

3,700 

560 

2,310 

426 

244 

184 

905 

370 

182 

1,540 

1,270

3,700

Minimum.

15

48 

84 

96 

126 

94 

57 

52 

74 

126 

99 

116

15

317 

343 

268 

268 

244 

182 

129 

127 

108 

70 

84 

81

70

Mean.

526 

748 

329 

294 

166 

200 

87 

449 

1,260 

602 

387 

1,210

521

719 

676 

369 

562 

317 

215 

161 

215 

145 

105 

294 

141

327

Run-off in 

acre-feet.

32,400 

44,500 

20,200 

18,100 

9,220 

12,300 

5,180 

27,600 

75,000 

37,000 

23,800 

72,000

377,000

44,200 

40,200 

22,700 

34,600 

18,200 

13,200 

9,580 

13,200 

8,630 

6,460 

18,100 

8,390

237,000
58 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

NORTH LLANO RIVER NEAR JUNCTION, TEX.

LOCATION. About 500 feet above remains of old Wilson dam, 1 mile below mouth of 

Bear Creek, 2J miles above North Llano highway bridge, 3 miles northwest of 

Junction, Kimble County, and 4 miles above confluence of North Llano and 

South Llano rivers.

DRAINAGE AREA. 803 square miles (measured on standard topographic maps; postroute map; and topographic map of Texas, compiled in 1899 by Robert T. Hill, 

of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. September 14, 1915, to September 30, 1920.

GAGE. Overhanging chain gage on left bank; read by J. L. Sparkman, A. T. Copple, 

and W. M. Keen.

DISCHARGE MEASUREMENTS. Made by wading or from highway bridge 2J miles below station.

CHANNEL AND CONTROL. Bed composed of solid rock. Channel straight above and 

below for 400 feet, with a series of pools and rapids. Left bank high, clean, and. 

not subject to overflow; right bank low, wooded, and subject to overflow during 

high stages. One channel at all stages; current sluggish at gage during low and 

medium stages. A solid rock ledge of approximately 2 feet vertical fall at site of 

old dam serves as a permanent control for medium and low stages, except slight 

effect from accumulation of moss during low stages.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 30, 1919, 10.8 feet at 6 a. m. September 22 (discharge not determined); minimum stage, 0.82 foot October 8, 1918 (discharge, 0.3 second-foot).

Maximum stage recorded during year ending September 30, 1920, 4.4 feet at 9 

a. m. May 13 (discharge not determined); minimum stage, 1.26 feet July 23-29 

and August 3 to 6 (discharge, 12 second-feet).

1915-1920: Maximum stage recorded, 18.00 feet during night of September 15, 

1915 (discharge not determined); no flow during periods in 1917 and 1918.

ICE. None.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show 

that about 1,200 acres have been declared irrigated by diversion above the station. During low stages, such diversions materially reduce flow at station.

REGULATION. None.

ACCURACY. Stage-discharge relation practically permanent for low and medium 

stages, except as slightly affected by aquatic growth on control. Rating curves 

used November 8, 1918, to September 30, 1919, and October 1, 1919, to September 30, 1920, fairly well denned between 1 and 120 second-feet; extended above. 

Gage read to hundredths twice daily and oftener during floods. Daily discharge 

determined by applying mean daily gage height to rating table; indirect method 

used October 1 to November 7, 1918. Records good for low and medium stages.

Discharge measurements of North Llano River near Junction, Tex., during the years ending Sept. 30, 1919 and 1920.

Date.

1918. 

Oct.. 4

1919.

8

May 19

July 25

Made by 

Dudley and Twichell . .

Gage 

height.

Ft. 

0 94

1 ^5

1 ^

1.70

1.54

Discharge.

Sec.-ft. 

«0.5

21.4

21.0 ins

46.7

Date.

1919. 

Nov. 19

1920.

Mar. 5

Made by 

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

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

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

Gage 

height.

Ft. 

1.69

1.62

1.55

1.43

Discharge.

Sec.-ft. 

91.6

70.8

49.1

33.4

Estimated.
COLORADO RIVER BASIN. 59

Daily discharge, in second-feet, of North Llano River near Junction, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11............

12..............

13..............

14..............

15... ....

16........

17........ . ..

18..............

19. . .. .

20..............

21...... .....

22..

23....

24. ............

25..

26..............

27. ..........

28........... ..

29..............

30..............

31........... .

1919-20. 

1....

2...... ..

3

4..............

5...... .

6... .

7........ . .

8............ .

9.... .

10..............

11..........

12............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28. .............

29..............

30..............

31..............

Oct.

1.2

1.0

.9

.9

.9

.7

.4

.3

.9

7.2

6.6

36

14

1.6

1.6

1.6

1.6

1.5

1.5

11

70

20

18

29

21

19

17

15

12

8.4

One

IQfi

196

196

188

173

165

162

196

177

1 Vi

158

150

147

143

143

143

Nov.

8.4

 7.2

7.2

7.2

8.4

9

c

9 A

93

83

70

64

58

47

39

36

36

33

31

30

27

30

23

23

23

23

23

21

21

132

129

122

114

114

114

140

147

122

114

107

100

03

93

93

93

93

93

100

100

93

89

86

86

S9

78

78

96

86

78

Dec.

19

19

19

19

19

19

18

18

18

18

1ft

16

16

16

16

16

16

16

16

21

23

23

34

30

25

24

23

23

21

21

21

75

75

75

75

78

71

64

61

61

61

61

61

61

61

61

61

61

61

56

56

51

51

51

51

51

51

51

51

51

51

51

Jan.

21

21

21

23

23

OO

9°.

21

21

21

21

21

21

99

99

91

21

21

21

21

16

117

93

^0

25

25

42

44

39

33

34

49

49

49

49

78

68

54

51

49

ao

78

78c;Q

>w

59

59

59

10

59

61

CQ

75

78

71

71

71

71

71

71

71

71

Feb.

33

33

30

34

36

OA

on

30

30

On

on

30

30

30

Oft

30

34

30

27

33

9O

25

21

21

21

91

21

91

CQ

59

59

59

>w

59

1Q

59

>w

59

>w

59

CQ

P.O.

f=iQ

59

59

cn

56

54

54

49

49

40

49

49

40

40

Mar.

21

21

21

21

21

21

21

21

21

21

21

21

21

91

21

21

21

21

21

21

21

21

21

49

110

86

58

ql

30

30

30

49

59

59

59

54

54

49

49

49

49

49

49

40

49

41

41

41

41

41

41

41

38

54

47

41

41

38

38

38

Apr.

30

34

37

33

33

30

27

25

33

9Q

23

23

23

91

21

21

21

21

21

21

21

19

19

18

17

17

17

17

17

168

38

38

38

38

38

39

41

41

41

41

41

41

38

38

38

35

35

35

35

35

35

33

32

32

32

32

32

32

32

May.

49

36

30

30

36

30

25

25

26

30

117

124

39

39

39

39

39

93

93

93

93

80

67

97

61

61

49

34

33

30

39

32

32

32

32

29

29

26

26

26

24

26

26

68

61

49

41

41

41

41

41

38

35

32

29

29

26

26

26

June.

33

49

31

30

30

30

30

30

44

64

58

55

49

39

39

49

58

36

42

97

117

77

55

216

180

32

26

26

26

26

26

26

24

24

24

22

22

22

22

22

22

22

22

22

22

35

26

25

24

22

22

22

22

22

July.

153

127

120

100

97

86

97

103

80

70

58

55

52

44

44

42

39

36

36

47

67

47

44

52

49

44

37

34

31

29

29

20

18

16

18

20

18

16

22

25

26

26

23

22

20

18

18

18

18

16

16

15

14

12

12

12

12

12

12

12

16

16

Aug.

29

29

27

26

24

24

22

20

20

20

20

20

20

20

20

20

18

17

17

17

172

134

127

153

114

107

86

16

16

12

12

12

33

22

22

18

18

18

16

129

71

64

59

154

75

61

56

51

38

38

38

38

Sept.

77

67

67

64

55

131

100

86

86

103

38

158

68

59

64

49

45

38

38

38

38

35

35

32

32

29

28

26

26

26

26

26

26

24

24

24

23

22

111

NOTE. No record Sept. 6-15,1919. Discharge for following days not determined, bee ause stage was above 

the limit for which rating curve was defined by discharge measurements:
60 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Day.

1918.

Nov. 8...

9...

1919.

June 24.

25.

26.

27.

28.

Gage 

height.

Feet.

4.06

2.91

2.36

3.02

3.13

2.84

2.46

Day.

1919.

Aug. 21.

22.

23.

24.

Sept. 16.

22.

23.

24.

25.

Gage 

height.

Feet.

5.54

4.04

2.46

2.00

2.31

6.39

6.58

6.83

3.39

Day.

1919.

Sept. 26.

27.

28.

29.

30.

Oct. 1.

2.

3.

4.

Gage 

height.

Feet.

2.77

2.63

2.49

2.40

2.32

2.24

2.17

2.12

2.10

Day.

1919.

Oct. 5.

6.

7.

8.

9.

10.

11.

12.

22.

Gage 

height.

Feet.

2.07

2.28

2.14

2.33

2T14

2.06

2.02

2.01

2.72

Day.

1920.

May 13. .

14. .

Aug. 14. .

15. .

16. .

17. .

Sept. 29. .

Gage 

height.

Feet.

2.90

2.14

2.91

3.80

2.70

2.09

2.52

Monthly discharge of North Llano River near Junction, Tex.,for the years ending Sept. SO,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

1919-20.

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

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

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

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

Discharge in second-feet.

Maximum.

36

34 

117 

36 

110 

168 

124

153

147 

78 

78 

59 

59 

41 

45 

26

Minimum.

0.3 

7.2 

16 

21 

21 

21 

17 

25 

30 

29 

17

78 

51 

49 

49 

38 

32 

22 

12

Mean.

10.5

20.0 

30.2 

28.6 

29.3 

28.6 

54.1

62.9

102 

59.9 

63.1 

56.0 

46.4 

36.6 

24.8 

17.4

Run-off in 

acre-feet.

646

1,230 

1,860 

1,590 

1,800 

1,700 

3,330

3,870

6,070 

3,680 

3,880 

3,220 

2,850 

2,180 

1,480 

1,070

NOTE. See footnote to daily-discharge table.

LLANO RIVER NEAR JUNCTION, TEX.

LOCATION. About 100 feet north of Kerrville-Junction road, a quarter of a mile northeast of Oliver ranch house, 3 miles below confluence of North Llano and South 

Llano rivers, 3£ miles east of Junction, Kimble County, and 4 miles above creek 

entering river from south.

DRAINAGE AREA. 1,700 square miles (measured on standard topographic maps; postroute map; and topographic map of Texas, compiled in 1899 by Robert T. Hill, of 

the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. September 13, 1915, to September 30, 1920.

GAGE. Vertical staff, graduated from 0 to 7.5 feet, attached to tree on right bank, and 

inclined staff, graduated from 7.6 to 19.5 feet, a few feet upstream from vertical 

staff; read by Sadie Oliver.

DISCHARGE MEASUREMENTS. Made by wading at Mason road crossing a quarter of a 

mile above gage or from cable 400 feet above gage.
COLORADO KIVEK BASIN. 61

CHANNEL AND CONTROL. Bed composed of solid rock, clean, and permanent. Channel straight for 700 feet above and 350 feet below the gage. Left bank of medium 

height, slightly wooded, and subject to overflow during high, water; right bank 

clean, high, and not subject to overflow. One channel at all stages except during 

extreme floods, when a small part of the flow may follow a slough that leaves the 

river a short distance above the gage, passes to the south of Oliver ranch house, 

and enters the main stream below the gage. Such conditions do not occur, however, at intervals more frequent than 10 to 15 yeara and will not greatly affect 

records. Rock ledge 75 feet below gage, forming a fall of approximately 3 feet, 

serves as permanent control for low and medium stages.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30,1919,15.0 feet at 11 a. m. September 27 (discharge not determined); minimum 

stage, 1.42 feet during October 6 and 7 (discharge, 35 second-feet).

Maximum stage recorded during year ending September 30, 1920, 10.0 feet at 

9 a. m. May 14 (discharge not determined); minimum stage, 1.68 feet during July 

28 to August 12 (discharge, 109 second-feet).

1915-1920: Maximum stage recorded, 26.3 feet at 3 a. m. September 16, 1915 

(discharge not determined); minimum stage, 1.32 feet during August 23-28, 1918 

(discharge, 13 second-feet).

ICE. None reported.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas show 

that about 2,500 acres have been declared irrigated by diversions above station 

and about 1,300 below station. Diversions materially reduce flow at station 

during low stages.

REGULATION. Slight regulation from water-power plant on South Llano River at 

Junction, Tex.

ACCURACY. Stage-discharge relation practically permanent.. Rating curve well 

defined between 24 and 250 second-feet. Gage read to hundredths once daily, 

oftener during high water, but one reading daily may not be true mean owing to 

slight regulation by power plant at Junction. Daily discharge ascertained by 

applying mean daily gage height to rating table. Records excellent for low and 

medium stages; determination of discharge above 400 second-feet may be considerably in error.

Discharge measurements of Llano River near Junction, Tex., during the years ending

Sept. SO, 1919 and 1920.

Date.

1918. 

Oct. 4

1919. 

Jan. 8

8

May 19

July 24

Made by 

Ellsworth and Congdon

Dudley and Twichell.. .

Gage 

height.

Feet. 

1.42

1.60 

1.60

1.92

1.74

Discharge.

Sec.-ft. 

30.6

78.8

77 0

222

151

Date.

1919. 

Nov. 18

1920. 

Jan. 21 

Mar. 4

Made by 

D. A. Dudley..........

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

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

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

height.

Feet. 

1.99

1.86 

1.80

1.74

Discharge.

Sec.-ft. 

253

197 

153

130

102723 22 WSP 508 5
62 SURFACE WATER SUPPLY, 1919-1020, PART VIII.

Daily discharge, in second-feet, of Llano River near Junction, Tex.,for the years ending

Sept. SO, 1919 and 1920.

Day.

1918-19. 

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

2.............

3.............

4.............

5.............

6.............

7.............

8.............

9.............

10.............

11.............

12.............

19

14.............

15.............

16.............

17.............

18.............

19.............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

1919-20. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21. ............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

39

39

39

39

37

35

35

39

39

39

no

no

no

39

74

74

74

74

69

69

69

RO

69

fiO

69

fiQ

fiO

69

69

69

fiQ

378

318

318

318

318

318

306

306

318

318

318

318

312

312

306

306

306

306

306

306

306

505

492

466

440

440

440

428

428

428

Nov.

69

69

69

63

63

63

63

208

208

208

208

160

160

142

142

142

142

142

116

116

109

109

94

94

94

428

403

403

403

403

390

390

390

390

318

330

330

318

295

272

272

260

260

260

260

260

260

250

250

9Kfi

250

239

O9Q

239

239

Dec.

94

94

94

94

94

94

94

87

87

87

87

87

87

87

87

87

102

102

102

102

<u

94

94

94

94

94

94

94

94

94

94

239

239

239

239

239

239

239

239

229

229

990

229

229

229

918

218

218

218

218

91 Q

208

208

198

198

198

189

189

189

189

189

189

Jan.

84

84

84

77

77

77

77

77

77

77

72

79

79

72

72

72

72

72

72

72

434 ocn

189

116

116

116

116

OOQ

151

116

189

189

179

179

179

179

179

105!

105!

198

198

1QQ

1QO

198

198

198

1QQ

193

1QQ

198

198

1QQ

189

189

108

1O8

198

198

Feb.

« 

116

116

116

116

116

116

116

116

109

109

102

102

102

102

102

98

98

98

98

98

QQ

91

01

91

KA

KA

84

84

198

198

198

198

108

198

189

189

189

1QQ

180

1 QQ

1CQ

1 QQ

189

189

189

IRQ

189

179

179

179

Mar.

84

84

StA.

84

84

84

84

KA

80

74

74

74

74

74

74

74

74

74

74

74

74

74

74

9OO

109

QJ.

94

QA

80

77

77

179

179

160

179

179

179

179

179

179

179

179

184

179

179

179

179

229

198

189

1SQ

189

179

179

179

Apr.

77

91

91

91

77

112

112

98

98

98

77

77

77

66

66

66

66

60

60

58

48

48

48

48

48

48

48

48

44

44

179

179

179

179

179

179

179

179

179

179

170

170

160

151

151

151

142

142

142

149

142

142

134

134

134

134

134

134

134

134

May.

102

58

58

58

48

48

48

48

102

170

213

213

213

213

198

198

198

198

198

198

198

198

198

1QQ

198

165

147

98

134

125

125

125

125

125

125

125

198

179

179

179

170

198

198

189

189

189

189

189

189

179

179

179

179

179

179

179

160

June

94

87

116

116

87

87

87

80

80

218

160

160

116

116

116

87

87

87

87

87

87

84

84

203

213

213

203

151

134

125

125

142

142

142

134

125

125

125

125

116

116

116

116

116

116

260

160

142

134

116

116

116

116

116

116

116

116

July.

165

112

112

112

112

112

156

120

112

112

112

112

105

102

91

91

91

91

91

134

134

160

160

142

142

109

109

102

102

94

94

116

118

120

125

125

125

125

125

125

125

125

125

125

125

125

125

125

116

116

116

116

116

116

116

112

112

112

109

109

109

109

Aug.

94

94

87

Q7

87

87

80

80

74

74

63

52CO

52

48

44

44

39

39

39

440

403

366

306

one

109

109

109

109

109

109

109

109

109

109

109

109

116

208

198

160

184

170

170

170

170

160

160

160

160

160

160

160

Sept.

306

306

306

306

306

306

306

306

260

260

208

OAQ

208

208

208

208

208

208

208

208

01 o

070

070

378

378

160

403

198

198

160

160

149

142

134

134

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

,116

116

575

NOTE. Discharge, July 1-3,1920, interpolated. Bating curve not sufficiently well defined to permit 

determination of discharge for following days:
COLOEADO RIVER BASIN. 63

Day.

1918.

Nov. 8... 

9...

10...

11...

12...

Gage 

height.

Feet.

3.00 

2.90

2.70

2.70

2.70

Day.

1919.

May 11. .. 

12. ..

13. ..

June 26. ..

27. ..

28. ..

Gage 

height.

Feet.

3.80 

8.62

2.83

3.91

5.52

3.01

Day.

1919.

Aug. 21. 

22.

23.

24.

25.

26.

Gage 

heignt.

Feet.

7.78 

8.00

4.90

3.88

2.80

2.68

Day.

1919.

Sept. 22. 

23.

24.

25.

26.

Oct. 22.. .

Gage 

heignt.

Feet.

14.00 

15.00

13.20

3.60

3.20

2.70

Day.

1920.

May 14.... 

15....

Aug. 14....

Sept. 29...

Gage 

height.

Feet.

10.00 

2.90

2.93

2.90

Monthly discharge of Llano River near Junction, Tex.,for the years ending Sept. 30,1919

and 1920.

Month.

1918-19.

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

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

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

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

1919-20. 

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

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

Discharge in second-feet.

Maximum.

74

102 

434 

116 

229 

112

165

428 

239 

198 

198 

229 

179 

260 

125

Minimum.

35 

63

87 

72 

84 

74 

44 

48 

80 

91 

39 

208

239 

189 

179 

179 

160 

134 

116 

109

Mean.

55.8

93.0 

114 

102

84.8 

69.7

116

308 

217 

192 

188 

182 

156 

130 

119

Run-oft in 

acre-feet.

3,430

5.720 

7,010 

5,660 

5,210 

4,150

7,130

18,300 

13,300 

11,800 

10,800 

11,200 

9,280 

7,740 

7,320

NOTE. See footnote to table of daily discharge.

BARTON SPRINGS AT AUSTIN, TEX.

LOCATION. Barton Springs issue from channel of Barton Creek, 1,600 feet above Bee 

Cave highway bridge, half a mile above confluence of Barton Creek and Colorado 

River, and half a mile southwest of Austin, Travis County.

RECORDS AVAILABLE. October 1, 1918, to September 30,1920. Daily records of flow 

of Barton Creek, which closely approximate flow of Barton Springs, as the ordinary 

flow of the creek is from the springs, have been published from April 25, 1917, to 

September 30, 1918. Miscellaneous discharge measurements of Barton Creek 

were made from 1894 to 1906, and during 1916 and 1917.

DISCHARGE MEASUREMENTS. Made by wading Barton Creek above and below the 

springs, in order to determine the flow of springs as indicated in the following table:
64 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Discharge measurements of Barton Creek and determination of discharge of Barton Springs 

at Austin, Tex., during years ending Sept. SO, 1919 and 1920.

Date.

1918. 

Oct. 18

Nov. 18

Dec. 2 

14

1919. 

Jan. 10

Feb. 11

27

Mar. 14 

Apr. 10 May 6

21

July 15

Aug. 12 

12

Sept. 11

29 

Oct. 8

Made by 

H. B. Kinni-

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

A. K. Gowans. 

Ellsworth and

Kinnison and

Hank and Go11. J. Hank.... 

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

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

Ellsworth and

Ellsworth and

T. Twichell.... 

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

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

D.A.Dudley.. 

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

Discharge 

of creek 

below 

springs.

14.1

17.6

16.5 

15.2

26.7

87.8

116

75.0 

105

1 450

249

QE ft

132

63.7

187 

228

Discharge 

of creek 

ahove 

springs

0

0

0 

0

60.0

20.2 

35.7

160

34.0

79.0

6 9

103 

158

Discharge 

of 

springs .

17.6

16.5 

15.2

56.0

54.8 

69.3

89

61.0

53.0

a 7.7

KC Q

84 

70

Date.

1919. 

Oct. 25 

Nov. 5

15

26 

Dec. 20

1920. 

Jan. 3 

17 

31

Feb. 21 

Mar. 2

20 

Apr. 13

24

May 8 

22

June 7 

22

July 7 

21

Sept. 20

Made by 

L. D. Snow. . . . 

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

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

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

T. Twichell....

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

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

Twichell and

Pritchett....

T. Twichell.... 

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

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

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

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

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

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

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

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

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

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

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

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

Discharge 

of creek 

below 

springs.

399 

198

162

122 

102

82.0

275

249

141 

116

81.3 

72.3

64.0

56.0 

164

133 

69.8

69.8 

58.6

121

61.4

Discharge 

of creek 

above 

springs.

270 

97

57.5

29.6 

23.9

11.0 

136

159

46.8 

29.1

10.0

.4

.3

0 

63.4

41.3 

6.5

6.5 

0

44.5

6-5

Discharge 

of 

springs.

129 

101

104

92.4 

78.1

71.0 

139

90

94.2 

86.9

71.3 

71.9

63.7

56.0 

101

91.7 

69.3

69.3 

58.6

76.5

60.9

o Measurement made at spillway of concrete oval of one spring. 

6 Estimated.

GTJADALTJPE RIVER BASIN. 

GUADALTTPE RIVER NEAR COMFORT, TEX.

LOCATION. On Comfort-Kerrville road 100 feet upstream from "Boerner crossing," 

3£ miles west of Comfort, Kerr County.

DRAINAGE AREA. 909 square miles (measured on topographic map of Texas, compiled in 1899 by Robert T. Hill, of the United States Geological Survey; scale, 

1 inch=25 miles).

RECORDS AVAILABLE. December 16, 1917, to September 30, 1920.

GAGE. Vertical staff in two sections on left bank; read by James B. Saylor and 

Robert Faust.

DISCHARGE MEASUREMENTS. Low-water measurements made by wading. No 

high-water section available.

CHANNEL AND CONTROL. Bed composed of rock, sand, and gravel. Left bank 

composed of clay, slightly wooded, and not subject to overflow. Right bank 

low, wooded, and subject to overflow. Control shifts during floods.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, about 41 feet on August 21, determined from flood marks near gage 

(discharge not determined); minimum stage, 1.06 feet at 2.13 p. m. October 8 

(discharge, 6 second-feet).

Maximum stage during year ending September 30, 1920, occurred on October 

16 (not recorded); minimum stage, 1.68 feet at 8.50 a. m. September 28 (discharge, 

58 second-feet).

1917-1920: Maximum stage recorded about 41 feet on August 21, 1919, determined from flood marks near gage (discharge not determined); minimum stage, 

1.06 feet at 2.13 p. m. October 8, 1918 (discharge, 6.0 second-feet).

ICE. None reported.
GUADALUPE BIVER BASIN. 65

DIVERSIONS. Few pumping plants along stream about 7 miles above station. Records 

of the Board of Water Engineers for State of Texas show that a total of about 400 

acres have been declared irrigated by diversion above the station.

REGULATION. At Kerrville and Center Point dams are constructed and water used 

for mill purposes, but the effect of the regulation is slight, except during lew

ACCURACY. Stage-discharge relation changes during floods. Rating curve fairly 

well defined below 400 second-feet and extended above. Gage read to hundredths 

once daily, except as shown in footnote to daily-discharge table. One reading a 

day may not be true index to discharge at low stages owing to storage and intermittent pumping above gage and to rapid fluctuations during flood stages. Daily 

discharge determined by applying mean daily gage height to rating table; indirect 

method used October 6, 1918, to September 30, 1919. Discharge above 400 

second-feet determined from extension of rating curve and subject to considerable 

error. Records fair.

Discharge measurements ofGuadalupe River near Comfort, Tex., during the years ending

Sept. SO, 1919 and 1920.

Date.

1918.

Oct. 22 

Nov. 30

Made by 

McCashin and Congdon. 

E. P. Congdon.........

Gage 

height.

Feet.

2.55 

1.68

Discharge.

Sec.-ft.

211 

56.9

Date.

1919.

Feb. 2 

Dec. 17

1920.

Sept. 8

Made by 

EUsworth and Congdon. 

C.E.Ellsworth........

McCashin and West. . .

Gage 

height.

Feet.

2.12 

2.96

1.99

Discharge.

Sec.-ft.

146 

361

114

Daily discharge, in second-feet, ofGuadalupe River near Comfort, Tex., for the years ending

Sept. SO, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19

20. .............

21..............

22..............

23..............

25. .............

26..............

27. .............

28..............

29. .............

30..............

31..............

Oct.

12

12

11

15

11

12

13

6

16

12

42

18

65

43

27

26

25

16

19

19

19

223

88

57

43

38

33

28

30

27

23

Nov.

21

21

22

23

23

24

663

.......

59

Dec.

55

50

48

45

44

43

43

43

42

42

41

40

100

65

64

61

199

197

176

169

880

402

177

1 Kf

i<yi

147

147

Jan.

147

147

145

145

145

116

83

70

67

66

64

60

60

61

64

154

112

112

112

112

108

 201

182

154

132

132

Feb.

136

132

226

126

126

112

112

110

108

108

108

93

90

84

93

102

93

90

84

76

81

81

76

73

73

Mar.

72

72

72

72

93

76

61

70

67

67

70

70

70

73

70

70

64

61

58

56

56

58

60

61

1,100

726

466

282

226

214

201

Apr.

172

201

177

168

124

112

102

282

102

102

108

101

on

90

83

76

76

73

70

67

70

73

73

73

73

73

154

132

May.

93

83

76

74

73

73

73

73

76

145

306

466

434

226

177

670

312

233

154

145

124

112

154

154

143

132

101

90

83

83

90

June.

82

74

84

81

72

68

67

78

88

466

112

88

84

76

74

73

73

90

154

132

108

108

108

88

90

652

880

670

312

226

.......

July.

187

159

150

141

128

120

810

920

532

434

253

226

190

154

154

154

132

120

112

110

466

635

434

466

282

372

286

201

177

168

154

Aug.

150

132

122

112

104

104

104

93

86

90

93

93

90

90

90

90

86

83

61

61

532

499

Sept.

466

402

372

366

366

357

350

342

342

312

294

282

253

635

635
66 SURFACE WATER SUPPLY, 191&-1920, PART VIII.

Daily discharge, in second-feet, of Guadalupe River near Comfort, Tex.,for the years ending 

Sept. 30, 1919 and 1920 Continued.

Day.

1919-20. 

l.. ............

2..............

3..............

5..............

6. .............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

775

775

775

775

775

775

775

880

880

880

845

845

845

Nov.

880

880

862

845

845

845

845

845

845

845

845

845

775

775

740

740

740

740

740

740

740

740

810

792

Dec.

77>;

77>;

740

740

740

740

740

740

740

740

740

740

740

556

372

372

372

357

357

357

357

357

357

357

342

342

342

342

342

342

Jan.

049

327

327 soft

Afifi

372

372

357

357

357

514

670

670

670

466

466

466

419

372

357

372

372

466

740

556

372

357

357

357

372

372

Feb.

372

372

372

372

372

372

357

357

357

357

357

357

357

357

350

342

342

327

327

312

312

312

312

312

312

312

297

297

297

Mar.

OQ7

282

282

282

282

282

282

282

282

282

275

268

268

268

253

253

248

248

248

242

242

466

372

253

250

248

248

248

Apr.

372

342

282

268

253

248

242

242

226

216

211

206

206

201

201

196

196

189

182

177

177

177

172

172

172

172

172

172

172

172

May.

170

168

168

163

154

154

150

150

150

150

150

150

845

656

466

253

242

226

201

201

198

196

191

191

187

177

177

177

177

June.

177

253

226

201

196

670

282

253

201

191

189

187

187

177

177

177

201

201

201

187

177

177

206

201

194

187

177

177

July.

168

159

154

148

143

132

130

130

130

130

121

112

104

101

93

101

101

102

104

101

97

93

90

90

90

90

90

90

108

112

108

Aug.

108

108

101

101

93

104

740

670

282

201

177

154

810

253

201

177

172

154

147

142

136

141

145

150

141

136

134

132

124

Sept.

112

93

61

112

109

107

104

110

104

104

104

100

97

97

93

93

93

91

88

86

83

76

70

67

67

64

61

58

112

76

9,16, 23, 3U, uec. 7,14, 21, and 28, 1919; Jan. 4,11, is, 25, Jbeo. l, 15, 22, 23, 29, Mar. i, 14, 21, 28, Apr. 4,11, 

18, 25, May 2, 9,16, 23, 30, June 13, 20, 27, July 4,11,18, 25, Aug. 1, 22 29, Sept. 5, 6,12.18,19, and 26,1920. 

Rating curve not defined for high stages to permit determination of discharge for following days:

Day.

1918.

Nov. 7.....

8.....

Dec. 23....

1919.

Jan. 22....

23....

24....

25....

25. . . .

Gage 

height.

Feet.

13.5

5.35

14.3

7.03

6.9

6.85

6.83

5.9

Day.

1919.

Sept. 14...

15...

16...

17...

18...

19...

20...

23...

24...

Gage 

height.

Feet.

9.0

11.75

11.3

5.7

5.5

5.5

5.5

13.1

9.1

Day.

1919.

Sept. 25 .

26 .

27

Oct. 8.

9.

10.

11.

13.

17. .

Gage 

height.

Feet.

6.5

5.9

5.3

9.2

6.2

5.1

5.1

5.2

10.4

Day.

1919.

Oct. 18.

20.

21.

22.

23.

24.

25.

27.

Nov. 1..

Gage 

height.

Feet.

8.9

7.0

6.5

9.8

7.9

6.1

4.8

4.8

5.8

Day.

1919.

Nov. 3....

4....

5....

6...-

1920.

May 14....

June 7. ....

Aug. 7.....

Gage 

height.

Feet.

5.2

5.2

5.0

4.8

8.2

5.7

18.5
GUADALUPE RIVEE BASIN. 67

Monthly discharge of Guadalupe River near Comfort, Tex.,for the years ending Sept. 80,

1919 and 1920.

' Month.

1918-19.

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

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

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

1919-20.

March.....

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

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

Discharge in second-feet.

Maximum.

223 

226 

1.100 

282 

670 

880 

920

880 

775 

740 

372 

466 

372 

168 

112

Minimum.

06 

73

56 

67 

73 

67 

110

740 

342 

327 

297 

242 

172 

90 

61

Mean.

33.2 

105 

156 

111 

169 

179 

285

804 

524 

433 

340

277 

213 

114 

89.7

Run-off in

acre-feet.

2,040 

5,830 

9,590 

6,600 

10,400 

10,700 

17,500

38,300 

32,200 

26,600 

19,600 

17,000 

12,700 

7,010 

5,340-

a Minimum probably due to diversions above gage. 

NOTE. See footnote to daily-discharge table.

GTTADALTTPE RIVER AT NEW BRAUNFELS, TEX.

LOCATION. At highway bridge on San Antonio-Austin post road, 700 feet below International & Great Northern Railway bridge, 1 mile below mouth of Comal River 

and 1 mile northeast of center of New Braunfels, Comal County.

DRAINAGE AREA. 1,760 square miles (measured on standard topographic maps; postroute map; and topographic map of Texas, compiled in 1899 by Robert T. Hill, 

of the United States Geological Survey; scale, 1 inch=25 miles).

HECORDS AVAILABLE. March 13, 1898, to December 30, 1899; January 27, 1915, to 

September 30,1920.

GAGE. Stevens water-stage recorder, attached to downstream side of middle pier of 

highway bridge, inspected by engineers from Austin office. A vertical staff gage 

in three sections attached to trees on left bank 200 feet below highway bridge, 

and one section on east side of left pier of highway bridge was read from January 

27, 1915, to September 28, 1917, when recorder was installed. Gage used from 

March 13, 1898, to December 30, 1899, was an inclined staff gage near the present 

highway bridge; relation between datum of inclined gage and that of the vertical 

staff gage not known. During normal flow, levels show 0.08 foot fall between 

intake of recorder and vertical staff gage location. Vertical staff gage in well of 

recorder set to read same as vertical staff downstream.

DISCHARGE MEASUREMENTS. Made from upstream side of bridge.

CHANNEL AND CONTROL. Bed composed of solid rock with pockets of coarse gravel; 

banks gravel, clay, and rock, slightly wooded, high, and not subject to overflow. 

Rock and gravel shoal just below gage serves as control; permanent except for 

slight aquatic growth during low stages.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 25.7 feet at 3 a. m. August 23 (discharge, 46,300 second-feet); minimum 

stage, 1.41 feet at 8 a. m. October 9 (discharge, 253 second-feet).

Maximum stage during year ending September 30, 1920, probably occurred 

during period, October 11-20, when water-stage recorder was not in operation; 

minimum stage, 1.99 feet at 4.20 p. m. September 8 (discharge, 476 second-feet). 

1898-1899; 1915-1920: Maximum stage recorded, 27.2 feet at 9.30 p. m. September 17, 1915, determined by leveling from flood marks (discharge, 5^1,300 

second-feet); minimum stage recorded, 1.23 feet at 6.20 p. m. May 30, 1918 (discharge, 188 second-feet).

ICE. None.
68 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

DIVERSIONS. Some water diverted for irrigation above station in Kerr and Cornal 

counties, and for water power, waterworks, and other municipal uses in Kerr, 

Kendall, and Comal counties; amount not known.

REGULATION. Flow at this point slightly regulated by operation of power plants on 

Comal River.

ACCURACY. Stage-discharge relation permanent except when affected by aquatic 

growth on control. Rating curve well denned between 250 and 40,000 secondfeet. Operation of water-stage recorder satisfactory except as shown in footnote 

to daily-discharge table. Daily discharge ascertained by applying to rating 

table mean daily gage height obtained from recorder chart by inspection, or by 

planimeter except as shown in footnote to daily-discharge table; shifting-control 

method used December 1, 1919, to May 13, 1920. Records excellent except 

during periods when discharge was estimated.

Discharge measurements ofGuadalupe River at New Braunfels, Tex., during the years ending Sept. 30, 1919 and 1920.

Date.

1918. 

Nov. 9

g

1919.

Jan. 30

Feb. 17

24

May 29

July 8

8

8

8

9

17

Aug. 20

23

Made by 

TT, -R. Tfinnisnn

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

R. J. Hank.............

C. E. Ellsworth........

C. E. Ellsworth........

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

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

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

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

Ellsworth and Dudley. . 

T. T. Twichell.........

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

Gage 

height.

Feet. 

4.08

4.24

9 on

2.70

9 ^M.

2.72

2.18

2.38

7.85

7.75

6 54

6.09

5.32

2.88 

2.48

17.03

Discharge.

Sec.-ft. 

1,810

1 '866 930

845

657

814

522

663

"6,200

o6,100

04,580

o3,910

3,180

947 

741

21,000

Date.

1919.

16

17

17

17

Oct. 23

Dec. 19

1920.

Feb. 17

Mar. 9

May 7

28

July 30

Made by 

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

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

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

L. D. Snow............

J. W. Pritchett.........

C.E. Ellsworth........

C. E. Ellsworth........

T. Twichell............

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

Gage 

height.

Feet. 

3.27

7.61

23.58

20.73

14.26

6.84

3.66

4.10

3.72

3.40

2.77

3.00

9 fi9

2.32 

2.34

Discharge.

Sec. ft. 

1,160

6,570

6 39, 100

631,400

615,100

c4,980

1,370

1,580

1,300

1,120

834

981

803

630 

636

o Surface velocity observed and coefficient of 0.95 used to reduce to mean velocity.

6 Surface velocity observed and coefficients of 0.84 and 0.95 used to reduce to mean velocity.

c Surface velocity observed and coefficient of 0.90 used to reduce to mean velocity.
GUADALUPE EIVEE BASIN.

Daily discharge, in second-feet, ofGuadalupe River at New Braunfels, Tex., for the years 

ending Sept. 30,1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

1919-20. 

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

2..... ... .

3..............

4..............

5..............

6..............

7... ...........

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16.... .........

17..............

18..............

19..............

20..............

21....... ...

22.............

23..............

24.....

25..... . .

26...

27..............

28..............

29..............

30..............

31..............

Oct.

327

308

298

287

284

280

284

287

277

277

323

335

294

287

274

277

280

280

284

9Qfi

294

359

498

928

502

597

453

W7

339

319

Vf\A

3 080 9' aftfl

2,750

2,750

2,590

9 ftin

1 09fl

4,620

3,420

3

C^A

10,000

C OKfl

4,620

5,000

4,380

3,900

3

*7Qfl

3,540

3,420

1 ion

3,420

3 ion

Nov.

301

294

290

294

290

290

290

1,210

2,520

3,210

1,100

720

574

507

574

552

625

462

399

170

371

363

110

359

359

351

355

355

363

379

3,080

4,020

2,970

2,860

2,750

2,640

2,590

9 4On

2,490

2,590

2,540

2,340

2,290

2,190

2,190

9 14/1

2,090

9 nAfi

1,990 i ono

1,850

1,850

1,800

1,800

1,760

1,760

1,760

1,720

1,760

1,760

Dec.

355

355

347

343

339

339

335

331

339

335

331

327

343

343

359

431

387

399

705

1,530

958

754

i isn

5,600

2,120

1,220

922

776

695

645

107

1,620

1,670

1,580

1,580

1,540

1,580

1,540

1,540

1,490

1,480

1 460

1,'450

1,440

1,420

1,410

i 4ftn

1,390

1,370

1 360

1*400

1 360

l'400

1,360

1,320

1,320

i <i9fl

1,280

1 9Sfi

1,280

1,280

1 9Qft

Jan.

556

525

498

476

466

458

458

444

427

419

415

411

407

407

440

561

606

602

579

556

670

4,040

2,040

2,060

1,260

1,040

958

916

946

830

792

1,280

1,280

1,280

1,240

1,320

1,360

1,440

1,360

1,320

1,280

1,280

1,670

2,040

1,900

1,800

1,760

1,720

1,620

1,580

1,580

1 14/1

i 4on

1,800

1,850

1,760

1,760

1,670

1,620

1,580

1,580

1,580

Feb.

764

737

720

764

748

786

786

737

700

680

675

695

655

650

630

606

630

645

665

685

695

700

675

665

655

635

630

625

1,540

1,540

1,490

1,490

1,490

1,490

1,440

1,440

1,440

1,440

1,440

1,440

1,440

1,400

1,360

1,320

1,320

1,320

1,320

1,280

1,280

1,280

1,280

1,240

1,240

1,210

1,210

1,210

1,210

Mar.

620

610

602

602

620

625

602

615

597

597

588

584

579

584

584

584

566

556

548

552

548

538

538

543

748

3,060

1.480

1,290

976

852

781

1,210

1,180

1,180

1,180

1,150

1,150

1,150

1,120

1,120

1,120

1,120

1,120

1,090

1,090

1,090

1,090

1,090

1,090

1 060

1*060

1 060

1 060

1,090

1,090

1,150

1 i fin

1,180

1,120

1,090

1 060

l'060 '

Apr.

900

825

786

754

732

705

732

842

695

660

655

650

630

620

606

602

597

588

588

584

570

570

561

552

552

864

836

1.210

1,360

1,120

1,060

1,030

1,030

1,030

1,030

1,030

1,000

1,030

1,000

970

940

940

O7n

070

940

01 n

om

910

880

880

880

880

QQ(\

852

oco

825

825

May.

852

680

597

566

548

534

946

655

597

592

1,180

1,540

1,600

1,300

1,010

880

830

1,040

904

803

798

726

690

742

690

841

1,130

737

660

606

584

852

852

852

825

825

825

852

940

880

852

825

825

825

2,960

5,470

3,510

1,940

1 14fl

1,360

1,210

1,150

1,090

1,060

1,030

1,000

970

1,000

Q7n

940

940

1,030

June.

574

574

852

592

556

556

543

534

548

675

825

836

685

602

574

630

764

650

615

695

720

635

847

874

2,270

2,360

3,940

4,720

2,500

1,470

1,000

940

1,000

940

1,030

1,000

1,060

1,280

1,540

1,180

1,060

1,030

1,030

940

940

01 n

880

OEO

880

852

880

880

910

880

852

ooc

798

798

852

798

July.

1,140

916

803

737

685

665

858

4,150

3,190

1,800

1,300

1,130

1,060

1,000

976

952

910

886

842

808

1,430

5,790

3,090

2,270

1,910

1,700

1,510

1,400

1,260

1 ion

1,130

7fi9

764

754

737

732

OQO

709

70*7

710

R01

685

680

670

660

655

CEA

645

640

635

625

615

610

610

606

602

588

588

588

588

625

620

Aug.

1,070

1,010

976

952

910

880

852

836

869

898

852

836

786

770

726

7ni

R01

685

710

fidft

705

5,760

25,200

17, 800

4 140

2,800

2 360

2^150

}

2 

'

200

635

620

615

606

602

606

680

4 !4n

750

Sept.

1,600

1,120

1,100

1,100

1,080

1,030

1,000

958

922

988

1,830

5,760

25,000

4,820

3,580

3,060

2,670

6,860

29,200

11,200

8,040

5,350

4,400

3,900

3,560

3,290

670

645

615

620

615

606

606

597

592

588

588

584

584

579

570

570

570

570

561

561

556

552

55&

538

552

> NOTE. Discharge estimated for following periods: Apr. 1-4, Aug. 29 to Sept. 5, Oct. 11-20, Dec. 10-18 

1919, and Aug. 9 to Sept. 6, 1920; braced figures show mean discharge for periods indicated. Gage height 

partly estimated June 28 to July 6, July 10-16, Sept. 15 and 16,1919, because of obstruction in intake pipe. 

Discharge partly estimated Oct. 10,21, Dec. 9 and 19,1919, and Aug. 8,1920. Discharge, Oct. 7,1919, and 

May 14-16,1920, determined by averaging the hourly discharge.
70 SURFACE WATER-SUPPLY, 1919-1920, PART VIII.

Monthly discharge ofGuadalupe River at New Braunfels, Tex.,for the years ending Sept.

30, 1919, and 19W.

Month.

1918-19.

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

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

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

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

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

1919-20.

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

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

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

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

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

Discharge in second-feet.

Maximum.

928 

3.210 

5,600 

4.040 

786 

3,060

1,600 

4,720 

5,790 

25,200 

29,200

29,200

4,020 

1,670 

2,040 

1,540 

1,210 

1,360 

5,470 

1,540 

898 

4,140

Minimum.

274 

290 

327 

407 

606 

538 

552 

534 

534 

665 

640 

922

274

2,590 

1,720 

1,280 

1,240 

1,210 

1,060 

825 

825 

798 

588 

602 

538

538

Mean.

348 

616 

782 

815 

687 

747 

699 

834 

1,110 

1,530 

2,720 

4,660

1,300

5,670 

2,270 

1,430 

1,560 

1,370 

1,120 

971 

1.300 

961 

671 

831 

600

1,570

Run-off in 

acre-feet.

21,400 

36,700 

48,100 

50,100 

38,200 

45,900 

41,600 

51,300 

66,000 

94,100 

167,000 

277,000

937,000

349.000 

135,000 

87,900 

95,900 

78,800 

68,900 

57,800 

79,900 

57,200 

41,300 

51,100 

35,700

1,140,000

GTTADALTTPE RIVER NEAR GONZALES, TEX.

LOCATION. Just below Guadalupe highway bridge, 1 mile below power house of 

Gonzales Water Power Co., 1^ miles south of Gonzales, Gonzales, County, and 

2£ miles below mouth of San Marcos River.

DRAINAGE AREA. 3,620 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. July 1, 1915, to September 30, 1920. The .United States 

Weather Bureau has obtained records from a gage at the power house of Gonzales 

Water Power Co. since September 1, 1904.

GAGE. Vertical staff in three sections on right bank just below bridge; read by Frank 

Wilson.

DISCHARGE MEASUREMENTS. Made from cable, one-fourth mile below gage, or by 

wading. Measurements made from highway bridge, above stage of 22 feet when 

banks are overflowed at cable section.

CHANNEL AND CONTROL. Bed composed of gravel and sand; channel below station 

straight for 500 feet, but above is broken by an island and is straight for not more 

than 50 feet. Banks composed of gravel and clay; medium height; wooded 

along water's edge on the right, and for some distance back on the left. Banks 

are overflowed at a stage of about 22 feet. At bridge, left bank protected by levee 

which is not overflowed, except during unusually high stages; right bank at 

bridge subject to overflow at stage of about 27 feet. Position of control not 

known. At a stage of about 22 feet (discharge, 11,400 second-feet) water 

begins to enter an old channel, locally known as "Cross Timbers" on right bank 

2 miles above gage and returns to main channel below gage. Consequently, all 

records of discharge greater than 11,400 second-feet do not represent the total 

flow of the stream, but only that in the main channel.
GUADALUPE KIVEE BASIN. 71

EXTKEMBS OF DISCHARGE. Maximum stage recorded during year ending September 

30,1919, 30.0 feet at 8.30 a. m. July 24 (discharge, 22,800 second-feet); minimum 

stage, 0.02 foot at 5.45 p. m. October 20 (discharge, 155 second-feet).

Maximum stage recorded during year ending September 30,1920, 32.8 feet 

October 13, estimated by comparison with United States Weather Bureau gage at 

Gonzales dam (discharge, 30,400 second-feet): minimum stage, 2.06 feet at 7.40 

a. m. September 26 (discharge, 698 second-feet).

1915-1920: Maximum stage occurred October 13, 1919 (see above); minimum 

stage occurred October 20, 1918 (see above).

ICE. None.

DIVERSIONS. Some water diverted above the station for irrigation and municipal 

uses, but the amount is small in comparison with the total run-off. As rainfall is 

nearly sufficient for general farming, irrigation is intermittent and it is extremely 

difficult to estimate the amount of water used.

HEGULATION. Flow at this point regulated somewhat by operation of water-power 

plants in the drainage above. Power house of Gonzales Water Power Co. is 

located 1 mile above station.

ACCURACY. Stage-discharge relation not permanent. Rating curve fairly well 

defined between 300 and 28,000 second-feet. Gage read to hundredths twice 

daily. Mean of two readings daily may not be true mean for day, owing to power 

regulation above. Daily discharge determined by applying mean daily gage 

height to rating table, or by shifting-control method as noted in footnote to dailydischarge table. Records fair.

Discharge measurements o/Guadalupe River near Gonzales, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct 31

Nov. 1

1919. 

Jan. 6

23

24 

25 

Feb. 7 

Mar. 12

May 30

July 18

Made by 

H. B. Kinnison ......

C. E. McCashin........

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

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

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

Ellsworth and Congdon

J. E. Powers...........

Ellsworth and Dudley. .

Gage 

height.

Ft. 1 10

1.07

1.90

19.13

14.65 

6.55 

2.44 

1.73

2.47

5.06

Discharge.

Sec.-ft. 

524

456

(UK

o9,530

5,910 

2,710 

1,100 

795

1,040

1,850

Date.

1919. 

Oct. 19

20

20 

21 

23

1920. 

Feb. 4 

Mar. 15

July 28

Sept. 13

Made by 

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

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

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

Ellsworth and Pritchett 

McCashin and Pritchett 

T.Twichell. ...........

McCashin and West. . . .

Gage 

height.

Ft. 

30.70

28.74

27.67 

24.95 

20.42

6.36 

4.25 

6.28

2.58

2.41

Discharge.

Sec.-ft. 

6<*27,600

c 18,760

cl8, 170 

c 14, 140 <*9,100

2,550 

1,590 

2,270

883

832

a Surface velocity observed and coefficient of 0.96 used to reduce to mean velocity. 

& Discharge in one channel measured; in three channels estimated.

c Water in two channels. Discharge measured in main channel only; flow in second channel not in - 

eluded. Surface velocity observed and coefficient of 0.93 used to reduce to mean. 

<* Surface velocity observed and coefficient of 0.93 used to reduce to mean.
72 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of-Guadalupe River near Gonzales, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

1........

2. .......

3........

4........

5. .......

.........

7........

8. .......

9........

10........

11........

12........

13........

14........

15........

16........

17........

18........

19

20........

21........

22........

23........

24........

25........

26........

27........

28........

29........

30........

31........

1919-20. 

1. ....... 

2........

3........ 

4........ 

5........

6....... 

.7.......

8....... 

9....... 

10.......

11........

12........ 

13........

14........

15........ 

16........

17........

18........ 

19........

20........

21........

22........

23........

24........

25. .......

26........ 

27........

28........ 

29........ 

30........

31........

Oct.

383

374

371

386

383

185

413

515

368

374

374

542

395

404

380

392

419

539

287

155

434

419

452

497

515

2,100

4,870

3,900

2,220

530

491

4,860 

4,460

4,180 

3,510 

6,660

8,470 

10,100 

12,800 

8,540 

5,710

11,200

17,500 

30,400

17,500

17,200 

14,200

23,600

21,400 

24.600

18,900

13,900

12,300

10,500

7 540

7*. 280

6,300 

5.560

5,260 

5,060 

4.860

4,820

Nov.

419

413

299

347

368

395

401

428

479

1,400

2,450

1.660

1,030

782

828

940

943

826

710

635

810

957

566

599

605

554

557

557

506

4,680 

4,410

4,590 

4,770 

4,050

3,870 

3,740 

3,600 

3,460 

4,230

3,960

3,600 

3,240

3,110

2,990 

2,910

2,870

2.830 

2,790

2,710

2,670

2,590

S

een

9 ^.Qft

2,510

2,510 

2,510

2,390 

2,390

2 OCA

Dec.

506

542

500

494

506

497

542

479

509

518

527

518

1,560

810

1,490

698

578

683

2,680

3,660

1.670

1,700

2,530

2,640

3,660

4,060

1.720

1,240

1,110

1,050

Qfid

2,390 

2,350

2,350 

2,390 

2,310

2,270 

2,230 

2,230 

2,190 

2,110

2,070

2,030

2 rtQA

1 QQO

1,950 

1,950

1,910

1,910 

2,630

2^430

2 190

2' 070

i oon

i Q^ft

1,910

1,870 

1,870

1,830 

1,790 i 7on

1 790

Jan.

912

845

842

834

737

740

761

707

701

698

695

689

668

674

680

786

1,200

1,080

884

876

1.170

2,540

8,580

7,270

2,620

1,870

1,580

1,390

1,310

1,310

1,090

1,760 

1,760

1,720 

1,720 

1,790

3,420 

3,420 

2,710 

2,470 

1,990

1,870

5,360 

11,400

11,200

4,640 

3,030

2 Q7A

2,750

2 CAA

2,510

2,510

2,470

9 ?on

6,660

10,700 

5.660

O OQA

3,030 

2,910

2 7QA

2,710

Feb.

1,170

1,130

1,150

1,100

1,200

1,110

1,090

1,100

1,060

1,080

1,010

988

982

954

932

904

964

908

932

988

985

1,020

999

1,030

Q71

929

908

904

2.670 

2,630

2,550 

2,550 

2,470

2,470 

2,390 

2,390 

2,390 

2,310

2,350

2,470 

2,390

2,310

2,270 

2.150

2,110

2,110 

2.110

2,110

2.070

2,030

2,030

1,990

1,950

1,870 

1,830

1,830 

1,830

Mar.

884

876

929

866

856

828

898

894

810

806

786

758

758

750

754

754

750

758

744

737

747

719

713

707

1,010

1,590

2,170

1,940

1.430

1,270

1,080

1,830 

1,790

1,790 

1,790 

1,760

1,680 

1,650 

1.650 

1,650 

1,650

1,650

1,680 

1,650

1,620

1,620 

1,580

1,580

1,580 

1,580

1 Ewtft

1 540

1 Ewtft

i *\4fl

1,510

1,540

1,580 

1,620

1,620 

1,580 

1 540

1*510

Apr.

996

1,020

5,040

6,470

1,720

1,280

1,130

1,070

1,020

974

960

971

982

915

880

898

838

828

800

786

768

772

775

764

747

731

719

719

731

3,940

1,510 

1,790

1,790 

1,720 

1,580

1,510 

1,440 

1,440 

1,480 

1,440

1,440

1,440 

1,400

1,370

1,370 

1,370

1 °.70

1,370 

1,370 i <un

i °.4n

1 340

l'340

1 300

1*370 

1,340

1 "Ufi

1,300 

1,300 

1 ' 300

May.

3,180

1,220

1,050

890

848

786

978

3,180

3,800

1,380

 1,590

4,090

6,650

3,100

1,670

1,480

2,120

2,100

1,350

1,840

1,620

1,170

1,050

5,060

6,460

4,140

1/590

1,490

1,270

1,040

964

1,300 

1,300

1,300 

1,300 

1,300

1,260 

1,230 

2,990 

3,740 

2,110

1,580

1,300 

1.260

1,910

11,200 

22,800

28,200

14,600 

4,770

3,070

2.630

2,430

2

OCfi

2,110

2,030

1,910 

1,870

1,910 

2,150 

1,760

1,720

June.

936

2,230

1,560

1,230

1,070

901

852

831

890

2,240

4,100

2,240

1,200

1,090

1,930

4,920

10,300

12,900

12,900

3,290

2,190

4,230

2,250

1,600

3,160

9,050

11,700

15,600

13,400

7,510

1,680 

1,720

3,150 

2,110 

1,720

2,230 

2,150 

2,710 

1,870 

2,110

1,830

1,680 

1,620

1,870

1,620 

1,480

1,440

1,440 

1,480

1,480

1,440

1,720

1,830

2,270

1,650 

1,400

 1 °.4rt

1,370 

1,510 

1,340

July.

4,240

3,100

2,430

2,470

1,950

1,810

2,190

2,450

4,130

5,420

3,200

2,350

2,010

1,870

1,720

1,620

1,580

1,870

1,600

1,650

1,970

4,680

15,300

20,200

12,800

5,850

3,160

3,300

3,000

2,720

2 OCA

1,340 

1,300

1,230 

1,540 

1,540

1,160 

1,120 

1,260 

1,160 

1,090

1,090

1,060 

1 060

1*020

1,020 

1,020

1.020

950

950

QQK

950

Q1 ^

Q*^ft

915

915

915

QI f*

880 

915 

880

1,160

Aug.

2,190

2,070

1,890

1 760

1,760

1,700

1,620

1,560

1,540

1,770

2,770

1,680

1,510

1,450

1,400

1,340

1,290

1,300

1,240

v iv\

1,700

4,470

4,020

7 880

12*000

17,700

10 onrt

5,680

3,210

3,160

3

AOA

915 

915

915 

915

915

880 

1,020 

1,370 

3,460 

4,910

2,750

2,190 

2,510

4,770

4,050 

1,790

1 440

1*370

1

OAA

1,230

1,160

1,480

2 CQA

1 790

l'l20

1,090 

1,020

1,020

985 

950 Qcn

Sept.

2,440

2,200

2,040

1.880

1,860

1,820

1,700

1,760

1,770

1,680

1,670

1,520

1,530

1,480

2,440

5,120

5,600

7,200

10 Ann

14,100

7,560

4,310

4,580

9,690

17 300

18,000

13,300

10,800

6,710

5,650

950 

985

950 

950 

880

950 

915 

880 

880 

880

880

775 

810

845

810 

810

775

810 

740

810

845

810

775

810

775

710

775

740 

810 

710

NOTE. Daily discharge determined by indirect method for shifting control during following periods: 

Oct. 1 to Nov. 10, Dec. 27,1918, to June 16.1919, July 1-22, 1919, Jan. 27 to Mar. 5, and May 20 to Sept. 30, 

1920. Oct. 13,18,1919, and May 16-17,1920, water over road and gage not read. Probable stage estimated by comparison with United States Weather Bureau records at Gonzales dam. Discharge interpolated, Oct. 29 and Nov. 18,1918. Minimum flow in October, 1918, probably caused by regulation at 

power plant above station. Records of discharge above 11,400 second-feet represent flow in main channel 

only; see "Channel and control."
GUADALUPE KIVEK BASIN. 73

Monthly discharge ofGuadalupe River near Gonzales, Tex.,for the years ending Sept. SO,

1919 and 1920.

Month.

1918-19.

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

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

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

1919-20.

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

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

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

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

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

Discharge in second-feet.

Maximum.

4,870 

2,450 

4,060 

8,580 

1,200 

2,170 

6,470 

6,650 

15,600 

20,200 

17,700 

18,000

20,200

30,400 

4,770 

2,630 

11,400 

2,670 

1,830 

1,790 

28,200 

3,150 

1,540 

4,910 

985

30,400

Minimum.

155 

299 

479 

668 

904 

707 

719 

786 

831 

1,580 

1,240 

1,480

155

3,510 

2,350 

1,790 

1,720 

1,830 

1,510 

1,300 

1,230 

1,340 

880 

880 

710

710

Mean.

776 

734 

1,310 

1,510 

1,020 

954 

1,340 

2,230 

4,610 

4,030 

3,530 

5,700

2,310

11,300 

3,250 

2,090 

3,760 

2,230 

1,630 

1,430 

4,240 

1,780 

1,070 

1,740 

. 835

2,960

Run-off in 

acre-feet.

47,700 

43,700 

80,600 

92,800 

56,600 

58,700 

 79,700 

137,000 

274,000 

248,000 

217,000 

339,000

1,670,000

695,000 

193,000 

129,000 

231,000 

128,000 

100,000 

85,100 

261,000 

106,000 

65,800 

107,000 

49,700

2,150,000

NOTE. See footnote to daily-discharge table.

GtJADALtJFE RIVER BELOW CtJERO, TEX.

LOCATION. Three-fourths mile upstream from Heards Bridge on Arneckville road, 

1 mile south of Dietze farmhouse, 2 miles below Clinton Bridge, 2$ miles southeast 

of Cuero, Dewitt County, 4 miles below Schleicher Bridge, and 8 miles below 

dam used for power development.

DRAINAGE AREA. 5,020 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas compiled in 1899 by Robert T. 

Hill, of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. August 6, 1916, to September 30, 1920. (Fragmentary from 

May 29, 1919, to August 10, 1920.) 'From December 26, 1902, to December 31, 

1906, and August 19, 1915, to August 6, 1916, a station was maintained at 

Schleicher's Bridge, 4 miles above this point. Discharge at two sites practically 

the same.

GAGE. Stevens water-stage recorder on left bank, inspected by E. B. Dietze.

DISCHARGE MEASUREMENTS. Made from cable 40 feet upstream from gage, or by 

wading.

CHANNEL AND CONTROL. Channel straight above and below station for 1,000 feet. 

Bed composed of gravel and small rock; clean and shifts slightly. Left bank composed of sand and dirt, covered with brush and open timber, and is 20 feet high, but 

at stages above a gage height of 20 feet is overflowed, the water submerging an area 

for one-fourth mile back from river; right bank composed of sand and dirt, covered 

with brush and trees on sloping side and cultivated land on top; high, and not 

subject to overflow. Rock and gravel rapids 250 feet below gage serve as a control 

during low and medium stages; shifts slightly.
74 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

EXTREMES OF DISCHARGE. Maximum stage during year ending September 30,1919, 

probably occurred during period July 23-28, when recorder was not in operation, 

and reached a height of about 30 feet as determined from flood marks on gage 

house (discharge, 55,000 second-feet); minimum stage, from water-stage recorder, 0.87 foot from 5 to 11 a. m. October 1 (discharge, 225 second-feet).

Maximum stage recorded during year ending September 30, 1920, 19.6 feet 

October 24 (discharge, 15,200 second-feet); minimum stage from water-stage recorder 1.68 feet at 2 a. m. September 18 (discharge, 703 second-feet).

1916-1920: Maximum stage in 1919 (see above); minimum stage from water-stagerecorder, approximately 0.58 foot from 9 to 10 a. m. November 1,1917 (discharge, 

80 second-feet, determined from extension of rating curve and possibly slightly 

in error.

ICE. None.

DIVERSIONS. There are numerous small diversions above station for irrigation and 

municipal uses, but flow is probably not materially affected thereby except possibly during extremely low stages.

REGULATION. Flow partly regulated during low and medium stages by operation of 

water-power plants upstream, chiefly by a plant about 8 miles above.

ACCURACY. Stage-discharge relation practically permanent. Rating curve well denned between 200 and 15,000 second-feet. Water-stage recorder not in operation 

from July 11,1919, to August 18,1920. Daily discharge ascertained by applying 

mean daily gage height to rating table. Mean daily gage height from recordergraph determined by inspection or on days of considerable fluctuations by use of 

planimeter. Records fair.

Discharge measurements ofGuadalupe River below Cuero, Tex., during the years ending

Sept. SO, 1919 and 1920.

Date.

1918. 

Oct. 11

30

Nov. 1

Dec. 1

1919.

Jan. 6

24 

Feb. 12

Mar. 12

Made by 

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

"FT, T$. Tfinniscm

E. P. Congdon.........

C. E. McCashin........

Ellsworthand Kinnison 

"FT, "R. Tfinniscm

height.

Feet. 

1.30

3.70 

1.36

1.07

1.79

13.95 

2.32

2.06

Discharge.

Sec.-ft. 

488

2,010 

525

360

757

oll,200 

1,100

981

Date.

1919. 

May 31

July 19 

Oct. 24

1920.

15

Made by 

Ellsworth and Dudley.

T. Twichell. ...........

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

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

Gage 

height.

Feet. 

2.89

3.78 

19.60

4.03

2.38

6.83 

2.12

Discharge.

Sec.-ft. 

1.360

2,160 

15,100

2,300

1,190

4 780 

938

Surface velocity observed and coefficient of 1.10 used to reduce to mean velocity.
GUADALUPE RIVEK BASIN. 75

Daily discharge, in second-feet, ofGuadalupe River below Cuero, Tex.,for the years ending

Sept. SO, 1919 and 1920.

Day.

1918-19. 

1... .......

2..........

3..........

4..........

6..........

7..........

8..........

9..........

10..........

11.......... 12.......;..

13..........

14..........

15..........

16..........

17..........

18..........

19..........

20..........

21..........

22..........

23..........

24..........

25..........

26..........

27..........

28..........

29..........

30..........

31..........

1919-20. 

1..........

2..........

3..........

4..........

5..........

6..........

7..........

8..........

9..........

10..........

11..........

12..........

13..........

14..........

15..........

16..........

17..........

18..........

19..........

20..........

21..........

22..........

23..........

24..........

25..........

26..........

27..........

28..........

29..........

30..........

31..........

Oct.

315

491

475

355

431

442

403

270

589

577

727

1,730

1,820

939

559

502

486

386

474

315

408

649

1,600

1,260

932

1,310

5,520

7,880

9,970

3,520

745

15,200

Nov.

535

553

442

474

486

458

524

559

408

763

2,210

2,720

2,400

1,320

1,160

1,950

2,730

2,120

1,230

861

1, 180

2,530

2,040

991

757

906

958

805

703

583

6,620

4,460

3,740

3,020

Dec.

469

559

559

518

524

508

513

480

403

458

524

547

2,000

3,480

5,830

2,670

900

739

2 720

6,000

6,890

3,160

2,100

2,330

3,660

4 410

4,540

2,540

1,640

1,360

1,220

2,720

2,350

2,580

2,420

Jan.

1.070

1,000

920

848

781

823

823

787

763

721

715

589

661

697

805

4 480

6 740

6,390

9 QflA

1 140

1,030

2,820

7 400

10*200

10 300

4,880

2,400

1,860

1,590

1 460

1 430

4. ^ 460

4,780

Feb.

1,370

1,250

1,250

1,360

1,430

1,490

1,390

1,230

1,160

1,160

1,100

1,050

991

991

978

932

972

972

960

946

1,020

1,020

1,020

1,060

1,060

985

998

972

Mar.

1,000

985

1,060

1,040

991

926

887

874

874

874

874

848

817

811

861

817

842

793

817

787

787

811

823

887

1,080

9 fifif)

3,510

3,200

2 780

9 flftn

1 740

1,980

.

Apr.

1,500

1,320

1,760

5,610

9,010

4,120

1 740

1*440

1,*250

1,090

978

985

Q79

1,110

1,060

QW

Qflfi

874

OKA

835

QOQ

OOQ

848

861 O-t -I

O1 t

848

QQJ.

Q9£

Q7Q

May.

3,940

5,080

2,030

1,390

1 240

1,130

2,810

6,550

5,730

7,950

6,280

5,050

5,220

8,000

5,680

2,420

1,900

2,800

3,450

2,170

2,620

2,280

1,520

2,580

6,580

9,520

11,700

11,100

"

1,520

i

j

........!1

June.

4,830

4,540

4 530

3' 640

3,440

4,600

6,550

7 660

7*640

5*260

4,420

6,470

10 400

11,800

13,800

14,800

4,830

4,700

3,600

4,000

9,220

11,400

12, 100

12,800

2,350

July.

13,000

12,100

828

1,950

1,580

1,320

1,230

5,560

4,750

3,420

Aug.

2,050

1 980

3,580

6,360

4,700

1,170

3,100

4,700

3,820

2,350

2,580

4,300

4,620

2,500

1,750

1,680

1,520

1.450

1,380

1,600

2,950

2,350

1,560

1,420

1,280

1,200

1,170

1 140 '

Sept.

1,620

1,680

1,060

998

1,100

1,100

1,030

978

1,200

1,090

1,060

1,060

991

984

991

1,010

984

939

946

887

900

932

913

926

939

900

887

854

913

894

906

1,560

NOTE. No record Mar. 9-11, May 15.28.1919, gage height interpolated. No record for periods not published. Gage heights partly estimated June 11,14-16,20,23-30, July 1,2,1919, Aug. 30 to Sept. 12,1920. 

Discharge from July 22,1919, to Aug. 4,1920, determined from one daily gage height reading on the days 

recorded; Aug. 5-18,1920, two staff gage readings daily.
76 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Monthly discharge ofGuadalupe River below Cuero, Tex., for the years ending Sept. SO,

1919 and 1920.

Month.

1918-19.

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

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

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

May 1-28.................................................

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

1920.

Discharge in second-feet.

Maximum.

9,970 

2,730 

6,890 

10,300 

1,490 

3,510 

9,010 

11,700

4,700 

1,560

Minimnm.

270 

408 

403 

589 

932 

787 

811 

1,130

1,140

854

Mean.

1,490 

1,180 

2,070 

2,530 

1,110 

1,230 

1,570 

4,600

2,290 

998

Run-off 

in 

acre-feet.

91,600 

70,200 

127,000 

156,000 

61,600 

75,600 

93,400 

255,000

930,000

99,900 

59,400

NOTE. See footnote to daily-discharge table.

SAN MARCOS RIVER AT SAN MARCOS, TEX.

LOCATION. Just below Cape Ginning Co.'s mill, 300 feet southwest of main San 

Marcos-Luling highway, 1 mile southeast of San Marcos, Hays County, 1J miles 

above mouth of Blanco River, and 1£ miles below dam of San Marcos Utilities 

Co, and large springs that furnish a constant supply for the stream.

DRAINAGE AREA. Indeterminate.

RECORDS AVAILABLE. June 10, 1915, to January 19, 1916; March 13, 1916, to September 30, 1920. Miscellaneous measurements made from 1894 to 1903.

GAGE. Stevens water-stage recorder on left bank, 300 feet below Cape Ginning Co.'s 

mill. Gage used June 10, 1915, to January 19, 1916, was vertical staff gage 

attached to the sewer trestle of San Marcos Utilities Co., 1,000 feet below AustinSan Antonio highway bridge, 1J miles above present site. Relation between 

datum of staff gage and that of water-stage recorder not known.

DISCHARGE MEASUREMENTS. Made by wading or from San Marcos-Luling highway 

bridge half a mile above gage.

CHANNEL AND CONTROL. Bed composed of gravel and sand with heavy aquatic 

growth which causes changes in control during practically the entire year. 

Channel straight for 200 feet above and below the station. Water clear, deep, 

and with scarcely any sediment except during floods, caused by local rains. 

Left bank wooded, high, and not subject to overflow; right bank wooded, low, 

and subject to overflow, the water spreading back a short distance to a second 

bank.

EXTREMES OF DISCHARGE. Maximum stage during year ending September 30, 

1919, from water-stage recorder, 15.54 feet at 5 p. m. July 21 (discharge not 

determined); minimum stage, 0.40 foot at 12.30 p. m. October 4 (discharge, 35 

second-feet).

Maximum stage during year ending September 30, 1920, 30 feet May 15, determined from flood marks on recorder house (discharge not determined); minimum 

stage, 1.75 feet at 8 p. m. September 30 (discharge, 134 second-feet).

1915-1920: Maximum stage recorded in 1920 (see above); minimum stage, 

0.34 foot at 12.50 p. m. September 26, 1918 (discharge, 11 second-feet).

ICE. None.

DIVERSIONS. A concrete dam just above the San Marcos-Luling road bridge makes 

a pond for Roger's resort and serves as a diversion dam for an irrigation plant on 

left bank; diversions intermittent, but when used takes about 95 second-feet from
GUADALUPE BIVER BASIN. 77

river. A water wheel is used to pump the water for irrigation and the water 

that passes through it is returned to the river above Cape Ginning Co.'s dam. 

About 1,000 feet above the station is adam constructed for the purpose of creating a 

pond from which water was pumped to the lands on the south bank. Only pumping plant or diversions between stationand mouth of Blanco River is about 250 feet 

below gage. Beckman dam just below mouth of Blanco River is used to impound 

 water for irrigation. During ordinary stages in San Marcos and Blanco rivers, 

this dam backs water up San Marcos River a distance of three-quarters of a mile, 

but flood stages in Blanco River create backwater at the station. Records of 

the Board of Water Engineers of. Texas show that about 1,000 acres have been 

declared irrigated in Hays County by diversions from San Marcos River. A 

large part of this area is located above the station. Little water is used for irrigation, as ordinarily the rainfall is sufficient to mature crops. Water is diverted 

above the station by the San Marcos Utilities Co. for municipal uses.

REGULATION. Flow during low and medium stages regulated by dams above, the 

greatest effect being that produced by the power dam of the San Marcos Utilities 

Co. in the upper part of San Marcos, near the springs. This dam backs water 

over the springs that form the source of supply of the river during ordinary 

stages. Water is stored at this point throughout the afternoon and evening and 

released during the morning. Large fluctuations are also caused by operation 

of water wheel at Cape Ginning Co.'s mill.

ACCURACY. Stage-discharge relation not permanent owing to moss and weeds in 

channel. Rating curve fairly well defined between 40 and 360 second-feet. 

Operation of water-stage recorder not satisfactory, as indicated in the footnote 

to daily-discharge table. Daily discharge ascertained by indirect method for 

shifting control, using mean daily gage height determined by inspecting recorder 

graph, or for days of considerable fluctuation by planimeter. Records fair.

Discharge measurements of San Marcos River at San Marcos, Tex., during the years 

ending Sept. 30, 1919, and 1920.

Date.

1918. 

Oct. 8

21

1919. 

Feb. 9 

Mar. 11

24

27

July 16

Aug. 20

Sept. 5 

Oct. 23

Made by 

Ellsworthand Kinnison 

Ellsworth and Congdon

C.E.Ellsworth. .......

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

Dudley and Twichell. . .

Gage 

height.

Feet. 

0.77

1.39

2.46

2.09 

2.05

2.51

2.80

2.78

2.75

3.24

3.06

2.83

4.45

Discharge.

Sec.-ft.

45.7

83.4

165

123 

101

150

155

147

180

152

149

155 

350

Date.

1919.

Tlof* 1Q

31

1920. 

Jan. 20 

Feb. 6

21

Mar. 17

Apr. 10

23

July 27 

Sept- 6

« 

Made by 

Ellsworth and Pritchett

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

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

C.E.Ellsworth........

C.E.Ellsworth........

C.E.Ellsworth........

T. Twichell............

Ellsworth and Twichell

Gage 

height.

Feet. 

3.60

3.08

3.10

2.98 

3.22

3.00

2.96

2.78

2.44

3.59

3.21

2.63 

2.39

Discharge.

Sec.-ft. 

338

257

218

235 

254

220

209

196

162

243

223

181 

189

102723 22 WSP 508 6
78 SURFACE WATER SUPPLY, 191&-1920, PART VIII.

Daily discharge, in second-feet, of San Marcos River at San Marcos, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

1919-20. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21............ .

22..............

23..............

24..............

25..............

26.......... .

27..............

28..............

29..............

30..............

31..............

Oct.

83

81

79

78

76

76

75

72

72

71

75

74

76

75

77

74

76

75

76

77

77

78

78

78

78

84

81

80

81

80

82

179

174

169

174

179

238

408

206

194

218

354

338

363

509

471

490

399

372

354

354

338

346

346

346

354

354

354

Nov.

82

81

84

84

85

86

85

87

88

88

87

88

88

89

90

89

90

90

91

92

93

92

91

92

93

93

93

93

92

91

354

372

372

372

372

381

381

381

381

381

346

Dec.

93

93

03

93Q<;

cu.

cu.

<KI

100

102

108

115

142

146

145

144

145

161

143

144

218

1Q7

150

143

141

138

137

136

252

252

245

*>Af\

238

9A^

238

238

225

225

225

212

212

Jan.

132

131

131

129

128

128

126

125

126

125

124

124

124

132

127

125

126

124

138

239

154

144

143

141 iin

138

tV7

136

919

206

206

232

225

218

218

206

232

OAK

267

260

260

267

OQA

OOQ

Tl^

297

9on

282

282

346

Feb.

122

123

122

122

126

isn

123

116

115

114

118

117

117

117

123

126

124

126

124

124

123

124

124

122

120

120

120

w;

282

260

267

267

267

260

260

267

267

260

260

252

238

245

245

238

noo

232

238

238

Mar.

121

121

121

123

122

122

114

107

109

108

100

103

106

106

116

134

130

129

130

131

129

122

125

127

138

133

130

132

129

126

134

206

206

194

200

194

206

206

200

206

200

206

200

200

200

206

Apr.

140

162

153

149

145

150

150

150

156

151

153

158

157

150

150

154

147

145

149

146

148

146

147

149

145

149

134

142

173

138

212

218

218

200

212

212

212

206

212

206

206

206

200

206

212

194

200

200

194

194

194

206

206

184

189

184

170

174

May.

135

141

133

131

137

1Q4.

254

160

170

162

196

241

173

155

167

139

150

154

156

156

153

156

164

164

163

160

162

167

171

IRQ

174

189

179

174

189

174

179

184

184

189

184

JQC

June.

169

175

171

161

161

163

147

162

154

164

166

157

150

143

155

267

264

174

169

170

160

164

162

158

222

208

200

280

165

158

206

206

212

290

245

212

206

200

200

200

194

206

200

206

206

200

212

200

206

919

212

206

200

206

200

225

212

206

July.

170

155

151

150

143

150

146

198

147

147

140

149

144

131

138

154

136

130

126

123

225

218

212

212

189

194

194

212

189

189

174

184

184

184

179

174

179

189

184

184

184

179

179

184

174

169

179

184

169

Aug.

146

145

148

156

150

174

174

169

174

174

174

435

274

194

189

184

206

290

232

218

218

218

218

212

212

206

206

206

206

200

200

200

200

200

194

Sept.

164

165

166

163

163

160

158

157

154

159

160

163

237

205

176

169

169

167

170

218

431

220

205

194

187

188

178

182

194

200

200

200

194

194

189

189

189

194

200

194

189

194

200

189

189

179

184

184

184

189

189

184

179

179

184

184

174

179

NOTE. Discharge not determined for following days because stage, as given, was above limit for which 

rating curve is defined: July 21,1919,8.69 feet; July 22,7.35 feet; Oct. 11,13.3 feet; Oct. 15, 6.5 feet; Oct. 16, 

6.6 feet; Oct. 17, 8.7 feet; Aug. 13,1920, 5.8 feet; no record for other periods for which discharge is not given. 

Discharge partly estimated, Nov. 19 and Dec. 19,1919; Jan. 13,20, Feb. 23, Mar. 17, June 3, and Sept. 10, 

1920.
GUADALUPE RIVER BASIN. 79

Monthly discharge of San Marcos tfiver at San Marcos, Tex.,for the years ending Sept.

SO, 1919 and 1920.

Month.

1918-19. 

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

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

February. ............................... I . March. ...................

April........................... .... . I

M^y.. ....................................

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

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

August 20-24. ..'...........................

September 3-30. .............

1919-20. 

December 19-31 ...........................

February 1-23.. . ..........................

March 17-31.. .............................

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

May 1-14... ...............................

June 3-30. ................................

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

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

Discharge in second-feet.

Maximum.

84 

93 

218 

239 

130 

138 

173 

254 

280 

198 

156 

431

252 

305 

206 

218 

435 

290 

218 

200

Minimum.

71 

81 

93 

124 

114 

100 

134 

131 

143 

123 

145 

154

212

232 

194 

174 

174 

194 

169 

179

Mean.

77.3 

88.9 

127 

135 

132 

122 

150 

164 

177 

146 

149 

187

235 

256 

202 

200 

203 

210 

186 

189

Run-off 

in

acre-feet.

4.750 

5,290 

7,810 

8,300 

6,780 

7,500 

8,930 

10,100 

10,500 

5,790 

1,480 

10,400

6,060 

11,700 

6,010 

11,900 

5,640 

11,700 

11,400 

11,200

NOTE. See footnote to table of daily discharge.

SAN MARCOS RIVER AT OTTINE, TEX.

LOCATION. At highway bridge one-fourth mile southwest of Ottine, Gonzales County, 

4 miles below mouth of Plum Creek, and 10 miles above confluence of San Marcos 

and Guadalupe rivers.

DRAINAGE AREA. IndeterminateL

RECORDS AVAILABLE. June 22, 1915, to September 30, 1920.

GAGE. Chain gage attached to upstream handrail of bridge; read by J. H. Kaine. 

Gage used from June 22 to October 12,1915, was a vertical staff under the highway 

bridge, but gage heights have keen reduced to datum of succeeding gage by means 

of a curve showing relation between readings of the two gages. Gage used from 

October 13, 1915, to March 15, 1920, was vertical staff in four sections attached 

to trees on left bank about 400 feet above bridge.

DISCHARGE MEASUREMENTS. Maile from downstream side of highway bridge or by 

wading.

CHANNEL AND CONTROL. Bed composed of sand, rock, and gravel; shifts. Bank' 

high and wooded; not overflowed except by extremely high water. Channel 

straight above and below the station for 150 feet. Low-stage control for gage used 

before March 15, 1920, formed by shoal 200 feet below gage. During high stages 

in Guadalupe River backwater changes stage-discharge relation.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 34.6 feet at 8 a. m. |uly 23 (discharge, 11,100 second-feet, determined 

from extension of rating curvfe); minimum stage, 1.20 feet at 6 a. m. October 6 

(discharge, 60 second-feet).

Maximum stage recorded during year ending September 30, 1920, 37.5 feet at 

7.30 a. m. May 16 (discharge, not determined); minimum stage, 2.6 feet at 6 p. m 

September 25 (discharge, 196 second-feet).

1915-1920: Maximum stage jrecorded in 1920 (see above paragraph); minimum 

stage, 1.06 feet at 7 p. m. August 26 and 27, 1917, and 6.30 p. m. July 31, 1918. 

(discharge, 26 second-feet).

ICE. None.
80 SUKFACE WATER SUPPLY, 1910-1920, PART VIII.

DIVERSIONS. Small amounts of water are diverted above the station for irrigation 

and municipal uses, but only a small part of the total run-off is used (see "San 

Marcos River at San Marcos "). Little, if any, water is diverted below the station.

REGULATION. Flow regulated by the operation of a small cotton gin a short distance 

above the station. The operation of several small water-power plants in the 

upper drainage basin near San Marcos and Martindale does not materially affect 

the flow at this station.

^CCURACY. Stage-discharge relation not permanent. Rating curve fairly well 

defined from 50 to 7,500 second-feet; extended above. Gage read twice daily 

to hundredths October 1, 1918, to May 6, 1919, and to tenths May 7, 1919, to 

September 30, 1920, but mean of two readings a day may not be true mean owing 

to power regulation above. Daily discharge ascertained by applying mean daily 

gage height to rating table; shifting-control method used January 22, 1919, to 

September 30, 1920. Records fair.

Discharge measurements of San Marcos River at Ottine, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 31

1919. 

Jan. 6

Feb. 7 

8

Mar. 11

July 18

Made by 

C. E. McCashin. .......

Ellsworth and Congdon 

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

Ellsworth and Dudley. .

Gage 

height.

Ft. 

1.58

2.28

3.30 

3.03

2.58

3.10

4.65

Discharge.

Sec.-ft. 

91 0

195

341 

299

213

294

494

Date.

1919. 

Oct. 24

1920.

Mar. 16

July 27

Sept. 14

Made by 

McCashin and Pritchett 

T. Twichell. ...........

height.

Ft. 

10.77

6.20

o4.22

7.25

3.16

3.04

Discharge.

Sec.Jt. 

1,990

805

460 

935

275

269

a Gage moved this date; new datum,

Daily discharge, in second-feet, of San Marcos River at Ottine, Tex., for the years ending

Sept. SO, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

72

73

73

76

70

66

112

71

71

73

95

74

79

74

74

72

72

71

66

65

65

70

72

81

81

958

4,830

568

114

116

98

Nov.

87

80

83

82

83

82

81

81

465

174

185

143

143

143

135

142

132

109

99

110

101

99

97

95

93

IfU

99

98

95Q";

.......

Dec.

83

83

82

83

74

97

99

104

110

99

93

93

3,350

1,940

156

143

137

261

2,630

1.400

932

375

670

2,440

1,060

411

348

294

170

86

158

Jan.

217

185

162

175

190

196

198

166

166

162

1 ^fi

148

186

62

214

80

146

81

c OQA

1,110

596

joe

AAf\

377

404

404

Feb.

368

350

341

386

OKrt

341

348

343

268

261

251

248

243

232

220

209

209 *>JK

260

260

OOJ.

244

263

277

294

288

277

273

Mar.

273

254

241

236

229

224

220

224

227

212

214

186

188

186

180

220

219

196

212

196

169

188

219

461

648

461

300

251

236

236

Apr.

154

612

5,440

1,140

326

316

364

277

277

248

254

268

268

266

244

244

234

227

232

217

217

215

196

194

10ft

145

3,530

2,210

May.

1,070

359

191

140

204

217

1,410

4,610

1,560

932

1,610

-5,440

4,190

750

526

364

1,190

1,450

1,120

Aon

329

338

4,000

4,330

2,320

657

524

380

336

322

June.

312

1,930

843

452

353

294

319

319

319

2,220

2,940

657

319

231

1,740

5,170

7,650

8,870

3,000

1,010

2,990

2,030

558

316

3,670

5,880

8,120

5,990

2,000

1,010

July.

1,920

850

694

449

341

577

577

998

1,760

766

634

539

395

359

440

440

440

494

377

449

706

7,640

9,810

6,330

4,510

2,000

706

1,190

1,340

998

886

Aug.

850

778

706

606

625

596

625

539

467

706

644

530

521

413

413

503

503

577

503

503

663

2,200

2,870

790

503

404

413

467

422

404

386

Sept.

395

386

324

324

324

316

333

290

324

333

299

282

307

341

3,060

6,180

1,330

3,690

778

625

802

886

3,560

5,780

2,620

1,210

838

814

1,040

838
GUADALUPE RIVER BASIN. 81

Daily discharge, in second-feet, of.San Marcos River at Ottine, Tex.,for the years ending 

Sept. 30,1919 and 1920 Continued.

Day.

1919-20. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22. .............

23..............

24. .............

25..............

26..............

27..............

28. .............

29..............

30. .............

31..............

Oct.

776

728

604

704

1,170

1,810

1,250

2,010

1,510

1,480

1,270

Nov.

1,330

970

1,200

1,120

1,100

1,140

1,040

995

995

2,630

1,330

1,020

1,070

824

752

776

680

680

680

623

604

566

566

585

642

680

704

680

661

752

Dec.

776

752

848

824

642

680

604

680

642

623

604

623

585

680

604

604

661

848

752

824

7fU

642

661

604

510

510

510

510

510

510.

Jan.

492

492

510

474

623

2,510

1,590

1,070

894

680

661

6,630

6,510

3,550

1,170

07n

896

cnn

824

800

896

920

1,330

|7 1 Kfl

5,410

1 Qftft

1,250

1 200 i',no

1,120

1.040

Feb.

824

752

776

872

824

872

776

776

728

824

7 co

776

848

752

680

680

680

824

728

680

680

680

680

680

728

728

680

704

680

Mar.

680

680

623

661

704

661

cftft

547

CAC

528

528

528

528

528

528

492

456

456

456

438

438

438

420

438

492

492

456

420

402

420

Apr.

<U7

642

623

JQO

456

366

384

QQJ

^Si

QJM

384

384

366

384

384

384

QJQ

0«fi

366

366

348

348

331

348

314

314

331

348

May.

348

331

qt A

oil

014

9Q7

^14

3 -ion

1 %fif\

456

474

331

314

2 oan

6,740

11,900

8,280

q 7KA

2 ^on

1,300

896

848

752

642

7fU

776

752

752

740

730

June.

I

I- 800

I

728

2,150

776

Qfln

704

776

704

824

776

623

510

474

JCC

tU7

W7

510

1,120

1,270

776

420

420

528

456

456

July.

438

438

JOA

402

00^,

0^0

348

<MS

348

qjo

331

314

297

' 11 i

297

11 i

280

280

01 A

331

9Q7

280

297

907

297

246

246

280

280

510

420

Aug.

9sn

280

280

280

263

280

246

1,560

1,810

848

wfi

1 480

3,750

4,260

1,270

680

566

528

474

456

456

3,270

1,040

547

492

420

456

AK/R

348

348

314

Sept.

QAfi

Ofifl

Qfift

*KSA

384

9Q7"

9Q7

297

919

OQ7

OQ7

^4£

263

280

331

331

280

qqi

99Q

331

263

263

229

246

212

229

229

263

229

229

NOTE. No record, Oct. 6-8,11-23, and 25-28, 1919; May 30-31, and June 1-5, 1920. Discharge, May 30, 

31, and June 1-5,1920. estimated by comparison with other records. Braced figures show estimated mean 

discharge for periods included. Discharge above 2,000 second-feet Aug. 1,1919, to Mar. 15,1920, subject to 

considerable error because of uncertain changes in datum of high-water section of gage.

Monthly discharge of San Marcos River at Ottine, Tex., for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

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

1919-20.

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

February. ............................ 4 .................

April................................... L. ...............

May.. ........................... ......I....... ..........

July.. ............................ ..... r . ................

September ............................. i .................

Discharge in second-feet.

Maximum.

4,830 

465 

3,350 

6,000 

386 

648 

5,440 

5,440 

8,870 

9,810 

2,870 

6,180

9,810

2,630 

848 

7,150 

872 

704 

642 

11,900 

2,150 

510 

4,260 

384

Minimum.

65 

80 

74 

62 

209 

169 

145 

140 

231 

341 

386 

282

62

566 

510 

474 

680 

402 

314 

297 

420 

246 

246 

212

Mean.

276 

120 

583 

631 

281 

248 

629 

1,350 

2,380 

1,600 

682 

1,290

841

913 

651 

1,790 

747 

516 

395 

1,770 

927 

334 

913 

289

Run-off in 

acre-feet.

17,000 

7,140 

35,800 

38,800 

15,600 

15,200 

37 400 

83,000 

142,000 

S8,400 

41,900 

76,800

609; 000

54,300 

40,000 

110,000 

43,000 

31,700 

23,500 

109,000 

-55,200 

20,500 

56,100 

17,200

560,000

NOTE. See footnote to daily-discharge^ table.
82 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

SAN ANTONIO RIVER BASIN. 

SAN ANTONIO RIVER AT SAN ANTONIO, TEX.

LOCATION. At South Alamo Street Bridge in San Antonio, Bexar County, 4 milea 

below San Antonio Springs, source of normal flow of river, and If miles above 

mouth of San Pedro Creek.

DRAINAGE AREA. Indeterminate.

RECORDS AVAILABLE. January 26, 1915, to September 30, 1920. Miscellaneous 

discharge measurements were made from 1895 to 1906.

GAGE. Gurley graph water-stage recorder on right bank at downstream side of bridge. 

Gage used from January 26,1915 to February 28, 1916, was vertical staff attached 

to downstream side of middle pier of Commerce Street Bridge. Gage used from 

February 29, 1916, to April 8, 1920, was vertical staff attached to upstream side 

of second bent of Presa Street Bridge. Relation of readings on different gages 

not determined. Discharge at various gages is probably not materially different.

DISCHARGE MEASUREMENTS. Made from upstream side of bridge or by wading.

CHANNEL AND CONTROL. Channel is straight for 100 feet below gage and curved 

above. Bed composed of sand, gravel, and silt. Control formed by gravel bar; 

shifts.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 

30,1919, 7.70 feet at 1 p. m. September 15 (discharge, 2,380 second-feet); minimum 

stage, 0.58 foot on several days during November and December (discharge, 7.0 

second-feet).

Maximum stage recorded during year ending September 30, 1920, 7.8 feet at 

Presa Street gage on night of October 16, determined from flood marks on gage 

(discharge, 2,430 second-feet, determined from extension of rating curve); minimum stage, 1.43 feet at South Alamo Street gage at 4 p. m. September 13, owing 

to regulation at power dam above gage (discharge, 97 second-feet). Minimum 

natural flow stage, 1.73 feet on September 30 (discharge, 119 second-feet).

1914-1920: Maximum stage recorded, 14.0 feet at 5.30 p. m. October 23, 1914 

(discharge, 4,700 second-feet, determined from extension of rating curve); minimum stage, 0.58 foot on several days during November and December, 1918 (discharge, 7.0 second-feet).

ICE. None.

DIVERSIONS. Quantity of water diverted above gage not known but is believed to 

be immaterial. Considerable land is irrigated from diversions below the gage.

REGULATION. The operation of water wheels at the Guenther flour mill just above 

the gage causes frequent but unimportant fluctuations in stage.

ACCURACY. Stage-discharge relation not permanent owing principally to aquatic 

growth on control. Some of the change that occurred during the period of April 

8 to July 1, 1920, may have been caused by movement of debris deposited in 

river during installation of water-stage recorder. Rating curve used October 1, 

1918, to April 7,1920, for staff gage at Presa Street well denned below 250 secondfeet and fairly well denned from 250 to 1,500 second-feet; curve used April 8 to 

September 30, 1920, for recording gage at South Alamo Street, well denned from 

115 to 150 second-feet. Staff gage read to hundredths twice daily and oftener 

during high water. Operation of water-stage recorder satisfactory. Daily discharge ascertained by applying mean daily gage height to rating table; shiftingcontrol method used October 1, 1918, to October 5, 1919, December 31, 1919, to 

January 31, 1920, and March 12 to July 8, 1920. Records good except those 

obtained by indirect method for shifting control, which are fair.

The normal flow of San Antonio River comes from springs within the city limits, 

but two tributaries from the north furnish considerable run-off at times of heavy 

precipitation. Changes in stage during low flow are believed to be due to pumping 

from deep wells for the city water supply and the use of artesian water for irrigation 

in areas adjacent to the river for it is thought that the wells draw from the underground 

reservoir that feeds the river by springs.
SAN ANTONIO RIVER BASIN. 83

Discharge measurements of San Antonio River at San Antonio, Tex., during the years

ending Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 12

Nov. 29

1919.

Feb. 3

Mar. 12

Apr. 17 

May 14

July 21

15

15

16

Made by 

Ellsworth and Quarles. .

R. J. Hank.............

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

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

height.

Feet. 

0.63

.59

.86

.94

.90

.98 

1.08

1.40

1.76

1.34

6.35

4.32

1.82

Discharge.

3ec.-ft. 

10.9

7.6

QC C

40.4

34.5

41.7

ATL Q

98.0

160

89.4

1,440

689

14A

Date.

1919.

30

1920.

Feb. 1

19

Mar. 10

May 7

July 9

30

Made by 

C.E. Ellsworth. .......

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

McCashinand Pritchett.

T. Twichell. ...........

height.

Feel 

2.06

2.04

2.15

2.10

2.13

2.10 

ol.91

1.86

2.04

2.00

1.92

1.78

Discharge.

Sec.-ft. 

200

194

281

218

206

212 

182

162

162

146

135

127

a New gage put in operation; datum changed.

Daily discharge, in second-feet, of San Antonio River at San Antonio, Tex.,for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

1 2.............

3.............

4.............

5.............

6.............

7.............

8.............

9.............

10.............

11.............

12.............

13.............

14.............

15.............

16.............

17.............

18.............

19.............

20.............

21.............

22.............

23.............

24.............

25.............

26.............

27.............

28.............

29.............

30.............

31.............

Oct.

12

12

12

12

11

11

10

10

11

11

70

10

10

10

10

10

10

10

10

10

11

41

11

10

12

58

14

8.0

11

10

11

Nov.

11

8.5

11

9.0

8.5

9.0

7.5

9.0

8.0

8.5

9.0

9.5

10

17

17

9.5

8.5

9.0

10

10

10

10

9.5

8.0

8.5

8.5

9.5

7.0

7.5

7.5

Dec.

8.0

7.5

8.0

8.0

8.0

8.5

8.0

8.0

7.5

7.5

7.5

8.0

11

7.0

7.5

7.0

7.5

50

119

12

8.0

9.0

124

13

12

12

11

11

11

11

12

Jan.

11

11

10

12

9.5

11

14

11

11

12

9.5

10

10

11

50

13

10

10

10

11

260

154

35

39

36

57

63

Q7

38

38

38

Feb.

39

37

39

76

39

37

36

36

36

37

39

42

42

38

35

34

52

34

41

37

36

34

33

34

36

34

35

35

Mar.

34

34

34

38

34

33

32

34

33

33

32

32

31

32

31

24

24

24

25

25

24

24

24

33

63

QA

30

OO

32

32

34

Apr.

34

93

42

41

45

47

50

50

50

48

48

48

48

48

47

AfL

41

40

40

VI

36

34

33

32

31

Q-l

31Q-l

 1CQ

^Q

May.

38

39

38

38

38

36

43

39

36

37

138

47

46

47

47

145

60

50

Cfl

AQ

48

47

46

13Q

46

47

46

46

45

43

43

June.

42

40

40

37

35

35

35

34

34

110

38

41

34

36

35

OK

35

34

32

32

31

30

30

35

145

601

102

on

72

70

July.

70

102

72

70

72

129

79

73

72

72

73

73

76

76

74

76

74

74

70

119

634

430

111

102

105

120

105

108

1AC

105

Aug.

104

102

100

100

100

100

100

100

100

96

94

92

90

88

87

81

81

80 inn

81

112

81

81

81

81

104

Oft

Oft

07

87

86

Sept.

87

86

83

81

81

81

81

01

R1

fil

81o-i

81

QQ

1,820

126

166

126

126

126

132

586

170

1AV

143

 MO

1 co

1 f\O

152
84 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of San Antonio River at San Antonio, Tex., for the years 

ending Sept. SO, 1919 and 1920 Continued.

Day.

1919-20. 

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

2.. ............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

152

152

152

152

152

363

220

180

170

170

985

273

295

205

700

1.040

328

251

251

251

275

249

240

240

240

243

243

243

243

243

243

Nov.

398

245

232

232

230

230

230

230

230

230

230 230-

230

230

230

230

230

230

230

230

230

230

226

224

220

217

217

213

213

213

Dec.

211

236

209

209

209

209

207

205

205

205

205

205

205

205

205

203

201

226

226

211

209

209

209

209

207

205

205

199

197

197

199

Jan.

201

203

205

207

338

243

236

234

230

232

238

478

299

271

266

262

260

260

262

264

266

269

315

280

264

251

245

238

232

226

220

Feb.

213

213

213

213

213

213

213

213

213

213

213

213

213

213

220

222

222

222

222

222

222

217

217

217

217

217

217

217

213

Mar.

213

213

213

213

213

213

209

209

209

209

209

207

205

207

207

205

203

203

201

199

197

197

195

193

207

203

201

201

199

195

191

Apr.

238

193

191

185

181

176

176

182

182

185

185

185

184

184

184

184

182

181

182

181

181

178

178

178

178

184

170

170

171

168

May.

168

164

166

163

162

163

164

163

164

167

166

166

181

182

168

167

168

168

170

170

168

170

170

171

170

170

168

168

168

167

170

June.

170

172

175

172

168

150

152

151

151

151

152

153

153

154

153

152

153

153

156

162

157

157

164

157

158

159

161

164

162

16].

July.

162

161

159

157

154

152

150

148

146

144

144

147

145

144

143

143

141

138

142

139

137

137

135

135

133

135

133

132

134

138

136

Aug.

135

137

135

135

135

134

143

133

136

135

134

133

146

135

133

137

136

135

134

134

134

134

135

133

133

131

131

129

128

130

128

Sept.

127

126

126

126

128

129

128

127

126

125

124

123

125

123

123

123

123

121

120

123

122

122

121

120

119

119

123

120

120

119

NOTE. Discharge, June 26, July 22, and Sept. 15,1919, determined from extension of rating curve and 

subject to considerable error. Discharge, Apr. 25 and July 4-8,1920, estimated or interpolated.

Monthly discharge of San Antonio River at San Antonio, Tex., for the years ending Sept.

SO, 1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

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

1919-20. 

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

70 

17 

124 

260 

76 

63 

159 

145 

601 

634 

112 

1,820

1,820

1,040 

398 

236 

478 

222 

213 

238 

182 

175 

162 

146 

129

1,040

Minimum.

8.0 

7.0 

7.0 

9.5 

33 

24 

31 

36 

30 

70 

80 

81

7.0

152 

213 

197 

201 

213 

191 

168 

162 

150 

132 

128 

119

119

Mean.

15.1 

9.52 

17.7 

33.9 

38.7 

31.5 

46.6 

53.6 

66.3 

116 

91.9 

186

58.8

295 

233 

208 

258 

216 

204 

183 

168 

158 

143 

134 

123

194

Run-off 

in acrefeet.

928 

566 

1,090 

2,080 

2,150 

1,940 

2.770 

3,300 

3,950 

7,130 

5,650 

11,100

42,700

18,100 

13.900 

12; 800 

15,900 

12', 400 

12,500 

10,900 

10,300 

9,400 

8,790 

8,240 

7,320

141,000
SAN ANTONIO KIVEB, BASIN. 85

SAN ANTONIO RIVER AT CALAVERAS, TEX.

LOCATION. One-fourth mile south of San Antonio & Arkansas Pass Railway station 

in town of Calaveras, Wilson County, 1 mile below mouth of Calaveras Creek, 

and 10 miles below mouth of Medina River.

DRAINAGE AREA. 1,870 square miles (measured on topographic map of Texas, compiled in 1899 by Robert T. Hill, of the United States Geological Survey; scale, 

1 inch = 25 miles.

RECORDS AVAILABLE. March 12, 1918, to September 30, 1920.

GAGE. Vertical staff in five sections on left bank near old brick plant; read by J. W. 

Dodson, C. B. Adams, and I. M. Smith.

DISCHARGE MEASUREMENTS. Made from highway bridge half a mile upstream from 

gage or by wading below gage.

CHANNEL AND CONTROL. Bed composed of sand and clay and free from vegetation; 

shifts. Channel straight above and below station for 150 feet. Left bank high, 

wooded, and not subject to overflow; right bank steep, wooded, and subject to 

overflow only at extremely high stages. Old bricks piled into channel form a 

semipermanent low-water control.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 38 feet at midnight, September 24 (discharge, 15,100 second-feet, determined from extension of rating curve); minimum stage, 0.12 foot at 6.30 a. m. 

October 5 (discharge, 25 second-feet).

Maximum stage recorded during year ending September 30, 1920, 32.2 feet at

8.35 a. m. October 7 (discharge, 10,800 second-feet, determined from extension of

rating curve); minimum stage, 2.0 feet September 30 (discharge, 146 second-feet).

1918-1920: Maximum stage recorded in 1919 (see above); minimum discharge,

15 second-feet September 14, 1918.

ICE. None.

DIVERSIONS. The Medina dam and reservoir, having a storage capacity of 254,000 

acre-feet, is located on Medina River about 50 miles above its confluence with 

the San Antonio. The diversion works having a capacity of 850 second-feet are 

4 miles below the Medina dam. There were probably about 10,000 acres under 

irrigation in this project in 1919 and 1920.

REGULATION. The ordinary flow may be slightly affected by storage and diversions 

on Medina River.

ACCURACY. Stage-discharge relation not permanent. Rating curve fairly well 

defined between 30 and 1,500 second-feet, and extended above by use of A-/d 

method, using one measurement at a discharge of 11,000 second-feet as a basis. 

Gage read to hundredths twice daily and oftener during floods. Mean of two 

daily readings may not be true index to mean for day, owing to regulation and 

rapidly changing stage. Shifting-control method used throughout the two-year 

period except November 15-26,1918, and May 1 to June 27,1919, when discharge 

was ascertained by direct application of mean daily gage height to rating table. 

Record fair for low and medium stages and poor for high stages.

Discharge measurements of San Antonio River at Calaveras, Tex., during the years ending

Sept. 30, 1919, and 1920.

Date.

1918 

Oct. 21

1919 

Jan. 23

31

May. 13

July. 21

22

Aug. 21

Made by 

C. E. Ellsworth........

Dudley and Twichell. .

T. Twichell. ...........

Gage 

height.

Feet. 

0.49

23.45

2.3S

3.98

3.35

19.20

2.32

Discharge.

Sec.-ft, 

36.3

4.420

115

282

221

3 '133 240

Date.

1920 

Jan. 21

Feb. 18

May 8

July 9

Sont Q

Made by 

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

Gage 

height.

Feet. 

6.92

6.11 

5.03

4.50

3.61

3.48

3.04

2.32

Discharge.

Sec.-ft. 

706

588 

453

363

270

282

231

172
86

Daily di

SURFACE WATER SUPPLY, 1919--1920, PART VIII.

:e, in second-feet, of San Antonio River at Calaveras, Tex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19.

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22. .............

23..............

21..............

25. .............

26..............

27..............

28..............

29. .............

30. .............

31..............

1919-20. 

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

2..............

3..............

4..............

6..............

7..............

8 .. . ..

9..............

10. .............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

34

33

32

31

28

31

32

32

31

32

34

234

72

52

42

38

36

35

37

36

35

270

865

140

74

728

1,480

181

77

52

50

2,650

2,310

2,110

1,940

1,790

3,900

8,660

3,870

2,620

2,480

6,080

4,220

2,510

2,340

2,240

5,060

9,040

9,170

8,790

6,740

6,400

4,350

3,330

2,980

2,680

2,400

2,210

2,030

1,790

1,570

1,640

Nov.

47

48

47

46

50

46

74

102

155

51

46

44

44

46

358

268

88

76

49

46

45

46

52

103

84

61

179

167

88

48

1,940

2,680

2,340

2,030

1,840

1,680

1,530

1,430

1,370

1,370

1,290

1,270

1,180

1,130

1 080

1,060

1,050

1,030

998

982

950

934

918

902

902

886

RS4

854

838

7on

Dec.

47

46

45

44

42

42

42

44

44

43

45

44

213

146

87

47

44

137

460

945

254

122

603

1,410

380

118

86

77

72

72

70

742

758

790

774

742

838

742

726

710

678

678

633

618

774

648

588

558

558

694

633

648

618

742

742

573

558

EJ.Q

543

528

513

513

Jan.

64

64

59

57

57

56

58

68

61,

58

56

53

54

54

61

242

134

74

. 68

64

61

3,570

7,420

697

424

172

165

300

150

126

115

498

498

484

484

573

918

774

618

588

543

543

1,600

1,550

982

Qfl9

838

726

726

710

710

CQ4.

678

742

Qfi9

806

742

710

678

678

678

678

Feb.

109

108

104

160

215

127

102

96

100

100

97

97

97

91

91

88

90

144

101

98

99

90

91

87

91

88

85

84

678

678

663

663

663

663

648

648

648

filft

633

663

838

633

633

603

588

KCQ

588

573

573

(rPO

558

t\4&

HiS

coo

498

484

470

Mar.

89

84

85

82

82

88

83

83

85

135

217

93

81

78

74

68

64

64

61

62

60

60

61

60

73

300

Aft

74

73

72

72

470

456 4<;fi

428

428

428

442

442

543

484

442

442

428

414

400

400

4.AA

OO7

Q7J.

374

Q74.

387

4/\A

074.

V7d

374

361

361

Apr.

72

93

1,150

242

120

102

99

96

95

92

86

85

85

84

82

81

75

74

72

68

68

68

68

68

68

64

64

66

2,120

1,230

361

400

428

456

414

374

374

374

361

318

348

348

335

335

322

322

01 A

310

298

9Qft

OQft

one

286

974.

286

286

9Qfi

974

274

274

May.

282

120

140

99

98

94

100

187

167

98

514

1,020

312

146

115

463

348

154

108

113

100

100

90

758

470

286

114

98

90

87

85

274

262

262

262

262

251

251

274

286

274

274

262

262

1,940

742

790

442

484

498

414

387

387

361

00 C

322

01 A

298

OQQ

618

361

June.

79

79

82

83

74

74

72

72

64

178

306

122

85

70

84

77

78

78

72

70

66

66

68

76

364

580

3

q7A

1,990

345

211

310

286

710

558

318

335

348

322

310

298

286

286

335

335

322

298

286

240

310

361

fiQl

588

442

274

274

974

298

OQO

OQ«

July.

168

154

182

470

148

146

615

645

211

167

148

133

130

126

126

121

114

113

104

102

158

3,380

2,660

3,240

956

542

494

403

264

212

195

274

262

262

274

262

262

251

240

229

229

218

218

218

218

208

198

198

198

198

198

198

198

198

198

188

188

188

198

188

Aug.

187

179

174

172

165

159

155

150

144

459

162

146

136

130

125

124

118

113

134

156

308

809

524

270

144

136

179

205

147

130

125

208

208

198

198

198

198

198

251

208

198

198

198

274

387

348

251

240

229

218

218

218

218

229

218

208

198

198

198

IQft

188

188

Sept.

120

118

119

112

114

114

116

113

120

114

109

112

114

108

3,000

.5,620

7,730

10,800

10,000

6,450

3,980

2,990

5.030

121800

13,200

8,940

6,070

4,340

3,340

3,020

198

179

179

179

179

179

179

179

170

162

162

162

170

170

170

162

162

162

162

162

162

162

162

154

154

154

162

154

146

146

NOTE. Gage heights partly estimated on Sept. 18, 24, and 25, 1919, account of water overtopping gage.
SAN ANTONIO KIVEE BASIN. 87

Monthly discharge of San Antonio River at Calaveras, Tex.,for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19. 

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

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

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

1919-20.

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

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

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

Discharge in second-feet.

Maximum.

1,480 

358 

1,410 

7,420 

215 

300 

2,120 

1,020 

3,370 

3,380 

809 

13,200

13,200

9,170 

2,680 

838 

1,600 

838 

543 

456 

1,940 

710 

274 

387 

198

9,170

Minimum.

31 

44 

42 

53 

84 

60 

64 

85 

64 

102 

113 

108

31

1,570 

790 

513 

484 

470 

361 

274 

251 

240 

179 

188 

146

146

Mean.

158 

86.9 

190 

473 

105 

89 

228 

224 

301 

536 

202 

3,630

516

3,870 

1,270 

658 

750 

610 

418 

332 

411 

354 

217 

222 

166

777

Run-off in 

acre-feet.

9,720 

5,170 

11,700 

29,100 

5,830 

5,470 

13,600 

13,800 

17,900 

33,000 

12,400 

216,000

374,000

238, 000 

75,600 

40,500 

46,100 

35,160 

25,700 

19,800 

25,300 

21,100 

13,300 

13,600 

9,880

564, 000

SAN PEDRO CREEK AT SAN ANTONIO, TEX.

LOCATION. At Commerce Street Bridge, 

Bexar County, 1J miles above mouth 

below San Pedro Springs, source of 

San Antonio River.

DRAINAGE AREA. Indeterminate.

RECORDS AVAILABLE. July 20, 1916, to

GAGE. Vertical staff, attached to wall 

upstream side of bridge on left bank

DISCHARGE MEASUREMENTS. Made by

CHANNEL AND CONTROL. Bed composec 

nel straight above and below station, 

improvements have confined the stre 

stages, but during floods the streets 

A shoal subject to shift, about 100

EXTREMES OF DISCHARGE. Maximum s

30, 1919, 4.45 feet at 8.20 a. m., September 15 

mined by extension of rating curve 

cember 10-11.

Maximum stage recorded during 

October 16 (determined from marks on gage 

discharge 8.2 second-feet, September

1916-1920: Maximum stage record 

(discharge not determined); rmninr. 

10-11, 1918.

ICE. None.

1J blocks west of courthouse in San Antonio, 

of Salsamora and Martinez creeks, 1£ miles 

creek, and 3 miles above confluence with

September 30, 1920.

of building No. 713 Commerce Street, on 

; read by G. H. Cumberland, 

fading below gage.

of rock, gravel, and mud; shifting. ChanBanks formed by walls of buildings. City 

m to a small channel during low and medium 

are covered with water for several blocks.

below gage, serves as control, 

tage recorded during year ending September 

(discharge, 335 second-feet, deter- 

); minimum discharge, 0.7 second-feet Defeet

year ending September 30, 1920, 3.4 feet 

; discharge not determined); minimum 

5-18.

d, 6.25 feet at 7.40 a. m. September 25, 1916 

um discharge, 0.7 second-foot December
88 SURFACE WATER SUPPLY, 19191-1920, PART VIII.

DIVERSIONS. None.

REGULATION. No dams, reservoirs, or controlling works that permanently regulate 

the flow.

ACCURACY. Stage-discharge relation not permenent. Rating curve poorly defined 

for all stages. Gage read to hundredths twice daily, but mean of two readings 

daily during flood stages may not be true mean, owing to rapid fluctuations. 

Daily discharge ascertained by indirect method for shifting control, but record for 

1920 not deemed sufficiently accurate to be published. Records poor. 

Entire flow of San Pedro Creek, except during times of heavy precipitation, is

furnished by San Pedro Springs, and the flow at this station is believed to be that

which reaches San Antonio River. Martinez and Salsamora creeks carry no water

except during heavy local rains, and have been known to be dry for several years at a

time.

Discharge measurements of San Pedro Creek at San Antonio, Tex., during the years 

ending Sept. 30,1919 and 1920.

Date.

1918. 

Oct. 12

Nov. 29

1919. 

Jan. 25

Feb. 3

Mar. 12

Apr. 17

May 14

July 21

T">on 17

30

Made by 

McCashin and Congdon 

E. P. Congdon. ........

E. P. Congdon. ........

C. E. Ellsworth........

Dudley and Twichell. .

C. E. Ellsworth........

Ellsworth and Pritchett

Gage 

height.

Feet. 

1.30 

1.58

1.39

1.40

1.38

1.40

1.44

2.32

1.48

1.67

1.67

Discharge.

Sec.-ft. 

2.8 

3.6

6.0

6.0

4.2

6.7

6.9

52.0 

8.6

13.5

12.1

Date.

1920. 

Jan. 22 

Feb. 1

19

Mar. 10

May 7

July 11

30

Sept. 7

Made by 

Ellsworth and Pritchett

C. E. Ellsworth........

McCashin and Pritchett

D.A.Dudley..........

C.E. Ellsworth........

McCashin and West. . . .

Gage 

height.

Feet. 

1.74 

1.74

1.68

1.68 

1.71

1.68

1.69

1.65

1 60

1.64

Discharge.

Sec.-ft. 

11.8 

14.3

13.6

12.8 

12.9

12.6

11.1

9.7

W o

a 74

Daily discharge, in second-feet, of San Pedro Creek at San Antonio, Tex., for the year

ending Sept. 30, 1919.

Day.

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

2.8

3.5

3.0

2.8

2.8

2.8

2.8

3.0

3.0

3.0

3.0

3.0

3.1

10

3.0

3.0

4.4

6.2

3.1

2.8

3.0

2.8

2.8

Nov.

3.0

3.3

3.1

3.3

3.7

3.7

3.5

3.9

3.7

3.9

3.5

3.7

3.5

6.9

3.7

3.1

3.3

3.7

3.7

3.9

3.7

5.4

4.8

4.6

4.6

4.4

3.9

3.7

S 7

Dec.

4.1

3.3

3.7

3.3

.9

.8

.9

.9

.8

.6

.7

.9

1.1

.8

.9

.9

1.0

3.7

34

1.5

1.4

1.3

20

1.7

1.7

1.9

2.0

2.0

2.3

2.3

2.5

Jan.

2.7

2.7

2.7

2.7

2.8

2.8

3.0

2.8

3.0

3.0

3.1

3.1

3.5

13

4.1

3.9

3.9

3.7

4.4

4.8

4.8

5.4

46

6.4

5.6

6.2

48

7.6

6.2

6.6

6.2

Feb.

6.4

6.6

7.4

6.4

6.2

5.9

5.9

5.6

5.9

5.9

5.6

5.6

5.6

5.6

5.6

5 4

5.9

5.2

5.2

5.2

5.2

5.2

5.2

5.2

5.2

Mar.

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

4.8

4.8

4.8

5.0

5.0

5.0

5.0

5.0

5.2

5.4

36

6.6

5.6

5.4

5.4

5.4

5.4

Apr.

5.6

13

8.5

6.4

6.4

6.4

6.4

6.6

6.4

6.4

6.6

6.6

6.4

6.6

6.6

6.4

6.4

6.4

6.4

6.4

6.2

6.2

6.2

6.2

6.2

5.9

5.9

134

40

May.

7.9

7.7

7.4

6.6

6.6

7.9

7.9

7.4

6.6

6.6

41

6.9

fi 0

6.9

6.9

6.9

11

7.4

7.4

7.4

7.4

7.4

7.4

21

7.4

7.4

7.2

7.2

7.4

7 0

7.9

June.

7.9

7.9

7.9

7.9

7.9

7.9

7.9

7 tl

17

7.9

7.9

7.9

7.9

7.9

7.9

8.5

9.4

8.5

7 tl

7 0

8.5

8.5

11

11

12

79

88

9.4

8.5

9

n

July.

7.6

18

7.4

7.4

7.4

52

7.6

7.4

7.4

7.4

7.4

7.4

7.9

7.6

7.6

7.9

7 0

8.2

8.5

44

48

72

18

15

12

14

13

13is

13

Aug.

13

14

13

14

14

15

15

16

16

16

16

16

16

16

16

16

15

13

12

12

48

13

9.6

9.4

9.1

8.8

8.8

8.5

8.5

8.5

8.5

Sept.

8.5

8.5

8.5

8.5

8.5

8.5

8.5

9.6

8.5

8.5

8.2

8.2

8.5

20

144

19

19

11

10

10

10

14

13

12

12

12

12

12

12

12

NOTE. Daily discharge determined by indirect method for shifting control during following periods: 

Oct. 1 to Feb. 15, Feb. 21 to Mar. 25, Apr. 1 to June 25. Aug. 22 to Sept. 14.
NUECES RIVER BASIN. 89

Monthly discharge of San Pedro Creek at San Antonio, Tex.,for the years ending Sept.

30, 1919 and 1920.

1

Month.

1918-19.

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

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

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

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

1919-20. 

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

10 

6.9 

34

48 

7.4 

36 

134 

41 

88 

72 

48 

144

144

20 

31 

15 

14 

26 

18 

20 

10 

21 

9.9

Minimum.

2.8 

3.0 

.6 

2.7 

5.2 

4.8 

. 5.6 

6.6 

7.9 

7.4 

8.5 

8.2

.6

12 

16 

13 

10 

13 

13 

13 

12 

10 

9.4 

9.4 

8.2

8.2

Mean.

3.29 

3.88 

3.35 

7.25 

5.71 

6.14 

12.0 

8.93 

13.9 

15.6 

140 

15.5

9.13

22.7 

18.2 

14.6 

12.6 

13.7 

13.1 

15.0 

13.5 

11.6 

9.84 

10.9 

8.65

13.7

Run-off 

in 

acre-feet.

202 

231 

206 

446 

317 

378 

714 

549 

827 

959 

861 

922

6,610

1,400 

1.080 

898 

775 

788 

806 

893 

830 

690 

605 

670 

515

9,950

NUECES BIVEB BASIN.

NUECES RIVER NEAR CINONIA, TEX. ,

LOCATION. Just below suspension highway bridge near Oswald ranch, 2 miles east of 

Cinonia, Zavalla County, 8 miles northeast of Crystal City, and 20 miles above 

Winter Garden ranch dam.

DRAINAGE AREA. 2,060 square miles (measured on standard topographic maps; 

post-route map; and topographic map of Texas, compiled in 1899 by Robert T. 

Hill, of the United States Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. July 5, 1915, to September 30, 1920.

GAGE. Vertical staff in six sections, installed May 6, 1918, on right bank, 200 feet 

below highway bridge; read by C. C. Oswald. From July 5, 1915, to September 

23, 1917, gage used was vertical staff in seven sections on right and left banks. 

September 24. 1917, to May 5, 1918, Dexter water-stage recorder near concrete 

control. All gages set at same datum and at approximately the same location.

DISCHARGE MEASUREMENTS. Made from downstream side of bridge or by wading on 

crest of concrete control.

CHANNEL AND CONTROL. Bed composed of clay and gravel; free from vegetation; 

subject to shift prior to September 23, 1917. Banks high and wooded, and not 

subject to overflow, except during extremely high water. Channel straight above 

and below station. An artificial concrete control was completed at the site of the 

gage on September 23, 1917; point of zero flow, 0.85 foot. The stage-discharge 

relation has been seriously affected at times prior to installation of artificial control by collecting of logs, leaves, and brush below gage.
90 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 49.1 feet, September 23, determined by leveling from flood marks (discharge not determined); no flow October 1-10.

Maximum stage recorded during year ending September 30, 1920, 26.3 feet at 

7 p. m. October 17 (discharge, 4,190 second-feet, determined from extension of 

rating curve); minimum stage, 1.40 feet September 14-30 (discharge, 11 secondfeet).

1915-1920: Maximum stage recorded in 1919 (see above). According to local 

residents, the greatest flood of record occurred in 1913 when the river reached a 

stage of 53 feet on present gage. No flow during periods in 1917 and 1918.

ICE. None.

DIVERSIONS. Considerable water diverted above station for irrigation; amount not 

known.

REGULATION. None.

ACCURACY. Stage-discharge relation permanent. Rating curve well defined below 

700 second-feet; above 700 second-feet, extended by use of velocity-area 

curves, and subject to error. Gage read to half-tenths twice daily. Daily discharge determined by applying mean daily gage height to rating table. Records 

good for low and medium stages.

Backwater from a dam 40 feet high, about 20 miles below station extends within 2 

miles of station when reservoir is full. A large part of the flow of the river is known 

to seep into the.bed just below Uvalde and return to the surface just above the station. 

The condition of the underground water may have an effect on this return water and 

thus help equalize the flow.

Discharge measurements of Nueces River near Cinonia, Tex., during the years ending

Sept. SO, 1919 and 1920.

Date.

1918. 

Oct. 23

23

23

24

Made by 

McCashin and Congdon

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

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

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

Gage 

height.

Feet. 

6.95

6.11

5.49 

2.54

Discharge.

Sec.-ft. 

379

322

268 

77.2

Date.

1919. 

May 10

Aug. 27

1920.

May 12 

July 16

Made by 

C. E.Ellsworth........

D. A. Dudley..........

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

C. E.Ellsworth........

Gage 

height.

Feet. 

1.26

9.23

4.10

1.85 

1.62

Discharge.

Sec.-ft. 

5.0

626

161

29.9 

18.9
NUECES BIVER BASIN". 91

Daily discharge, in second-feet, of Nueces River near Cinonia, Tex., for the years ending

Sept. 30, 1919 and 1920.

Day.

1918-19. 

1.......

2.......

3.......

4.......

5.......

6.......

7.......

8.......

9.......

10.......

11.......

12.......

13.......

14.......

15.......

16.......

17.......

18.......

19.......

20.......

21.......

22.......

23.......

24.......

25.......

26.......

27.......

28.......

29.......

30.......

31.......

1919-20. 

1.......

2.......

3.......

4.......

5.......

6.......

7.......

8. ......

9.......

10. ......

11.......

12.......

13.......

14. ......

15.......

16.......

17.......

18.......

19.......

20.......

21.......

22.......

23.......

24.......

25.......

26.......

27.......

28.......

29.......

30.......

31.......

Oct.

0

0

0

0

0

0

0

0

0

0

.8

58

25

10

2.8

1.1

.4

.4

.4

.3

.3

1,960

455

61

46

23

10

7.6

5.4

4.2

3.2

1,450

1,200

1,090

1,000

921

949

040

949

1.090

1,050

1 '963 000

842

790

754

1,000

3,600

3,120

1,910

1,450

1,120

077

935

855

829

718

694

1,350

730

637

Nov.

2.4

1.9

1.9

1 Q

1 Q

1 Q

256

28

15

11

5.7

3.0

2.4

2.2

2.2

2.2

1 Q

1.9

1.6

1.6

1.6

1.6

1.6

9 1

2.6

9 ft

2.6

2.6

2.6

2.6

615

560

549

538

498

582

518

478

4AS

458

438

420

420

4n9

4/19

384

384

366

366

357

357

348

348

33fi

QOft

319

312

312

312

Dec.

2.2

2.2

1.9

1.9

1.9

1.9

2.2

2.2

2.2

2.1

1.9

1.9

13

24

10

5.0

3.2

2.8

18

133

74

14

128

QA

21

11

8.4

7.2

7.2

6.8

5.7

348

9Ofi

296

288

280

280

272

272

264

264

256

248

248

240

232

232

224

224

224

224

232

232

224

216

216

201

201

194

194

187

187

Jan.

5.0

5.0

4.4

4.4

4.4

4.4

4.4

4 4

4.4

4.4

4.4

4.4

4.4

4.4

4.7

6.4

6.4

5.7

5.7

5.4

2,730

296

53

28

22

28

76

28

18

15

180

180

180

180

173

173

173

173

166

166

166

173

180

187

187

194

194

187

187

180

173

173

173

173

187

18ft

180

173

173

166

166

Feb.

14

13

11

33

53

32

17

14

14

14

14

8 9

8.0

Q ft

7.2

15

14

13

9 4

8.0

7 9

7.2

7.2

7.2

7.2

7.2

7.2

159

1 *Q

1 tiQ

1*9

1 V)

145

145

145

138

100

131

124

124

124

118

1 1ft

118

118

112

112

112

112

112

106

106

106

106

Mar.

7.2

7.2

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

6.4

5.7

5.7

5.7

5.7

5.7

5.7

5.7

5.7

6.4

8 9

90

22

17

13

7.6

106

103

100

100

100

100

04

94

94

94

88

88

88

QQ

85

82

89

70

76

76

73

70

70

73

70

76

76

70

70

70

Apr.

7.2

5Q

97

48

3n

18

16

14

12

8.4

7.2

7.2

7.2

7.2

6.4

6.4

6.1

5 7

5.7

e 7

5.7

c 7

5.7

5 7

c 7

5.7

5.0

5.0

5.0

5.7

70

70

64

64

64

64

64

64

64

64

CO

58

58

58

53

 59

 59

CO

53

53

43

43

43

38

38

43

38

38

33

33

May.

5 4

5.0

5.0

5.0

6.8

6.1

5.7

5.7

5.7

5.0

5.0

5.0

5.0

4.7

4.4

6.8

11

7.6

6.4

5.0

4.4

4.2

 3.2

488

816

194

53

3f>

21

17

14

33

38

38

33

33

33

3f>

28

28

28

28

30

30

30

33

30

30

3fl

30

30

30

30

33

33

33

00

33

33

33

33

oo

June.

14

14

14

13

11

9.4

7.2

7.2

7.2

6.8

6.4

5.7

5.7

5.7

5.4

5.0

4.7

8.0

8.4

6.8

5.7

4.4

46

71

61

66

70

28

21

16

33

33

33

30

36

38

37

34

33

32

30

28

32

33

32

30

29

28

28

29

34

33

30

30

28

28

27

26

26

26

July.

22

55

90

92

92

59

48

4/1

53

50

32

29

26

24

20

17

15

14

12

9.4

10

18

36

91

94

153

77

68

42

28

17

26

26

26

23

23

23

23

21

21

21

21

21

21

20

19

19

19

19

19

17

17

17

17

17

17

16

15

15

15

15

15

Aug.

15

14

14

12

11

10

10

9.4

8.9

8.0

8.0

8.0

7.2

7.2

7.2

7.2

6.4

6.1

5.7

5.0

5.0

5.0

742

2,400

1,250

829

620

463

388

330

280

15

15

15

15

14

13

13

13

18

18

16

15

13

152

131

28

19

19

19

19

19

17

17

17

17

17

17

17

15

15

15

Sept.

253

229

205

181

157

133

109

07

85

73

61

55

51

44

434

1,970

3,850

3.250

1,470

935

688

637

3,160

2,290

1,770

17

17

16

15

15

15

15

15

13

13

1»

13

13

12

11

11

11

11

11

11

11

11

11

11

11

11

U

11

11

11

NOTE. No record, Dec. 21,1918, and Sept. 1-6,1919; discharge interpolated. No record Sept. 23-27,1919, 

during which period floods occurred making it impractical to estimate discharge. Discharge ab ove 700 second-feet determined from extension of rating curve and subject to considerable error.
92 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Monthly discharge of Nueces River near Cinonia, Tex., for the years ending Sept. SO,

1919 and 1920.

Month.

1918-19.

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

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

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

September 1-22 ..........................................

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

1919-20.

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

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

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

Discharge in second-feet.

Maximum.

1,960 

256 

133 

2,730 

53 

29 

97 

816 

71 

153 

2,400 

3,850

3,600 

615 

348 

194 

159 

106 

70 

38 

38 

26 

152 

17

3,600

Minimum.

, 0 

1.6 

1.9 

4.4 

7.2 

5.7 

5.0 

3.2 

4.4 

9.4 

5.0 

44

637 

312 

187 

166 

106 

70 

33 

28 

26 

15 

13 

11

11

Mean.

86.3 

12.3 

19.7 

110 

13.6 

8.18 

14.3 

56.8 

18.5 

46.2 

242 

680

1,150 

425 

242 

177 

128 

85.1 

53.1 

31.6 

30.9 

19.5 

26.6 

12.6

200

Run-off in 

acre-feet.

5,310 

732 

1,210 

6,760 

755 

503 

851 

3,490 

1,100 

2,840 

14,900 

29,700

68,200

70,700 

25,300 

14,900 

10,900 

7,360 

5,230 

3,160 

1,940 

1,840 

1,200 

1,510 

750

145,000

NTTECES RIVER NEAR THREE RIVERS, TEX.

LOCATION. At San Antonio, Uvalde & Gulf Railroad bridge 1 mile west of Kittie, 2

milea southeast of Three Rivers, Live Oak County, and half a mile below mouth

of Frio River. 

DRAINAGE AREA. 15,600 square miles (measured on standard topographic maps;

post-route map; and topographic map of Texas, compiled in 1899 by Robert T.

Hill, of the United States Geological Survey; scale, 1 inch=25 miles). 

RECORDS AVAILABLE. July 1, 1915, to September 30, 1920. 

GAGE. Vertical staff in four sections, attached to piers of railroad bridge; read by

C. L. McMahon, T. H. Hammon, J. B. Mouser, and M. C. Mouser. 

DISCHARGE MEASUREMENTS. Made by wading near gage or from highway bridge

half a mile below gage. 

CHANNEL AND CONTROL. Bed composed of adobe shale; does not change greatly.

Channel straight above and below station. Banks wooded, high, and not subject

to overflow, except at extremely high stages. Position of high-water control not

known; shoal Just below gage probably forms low-water control. 

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September

30,1919,46.0 feet at 5 a. m. September 18 (discharge not determined); backwater

probably due to Gulf storm; minimum stage, 0.35 foot December 8-12 (discharge,

2.2 second-feet). 

Maximum stage recorded during year ending September 30, 1920, 36.1 feet

during morning of October 19 (discharge, 13,600 second-feet, determined from

extension of rating curve); minimum stage, 1.4 feet at 9 a. m. September 29 and

8.30 a. m. September 30 (discharge, 22 second-feet). 

1915-1920: Maximum stage recorded in 1919 (see above); no flow during several

periods of record. 

ICE. None.
NTJECES RIVER BASIN.

DIVERSIONS. Records of the Board of Water Engineers for the State of Texas showthat about 10,000 acres have been declared irrigated by diversions from the 

stream above the station.

REGULATION. None of consequence.

ACCURACY. Stage-discharge relation not permanent. Rating curve well defined 

below 7,000 second-feet; above this point extended by use of area-velocity 

curves and subject to error. Gage read to tenths twice daily from October 1,1918, 

to September 30, 1919, and once daily thereafter. Daily discharge determined 

by applying mean daily gage height to rating table to October 23, 1919, and by 

indirect method for shifting control for remainder of period. Records fair.

Discharge measurements of Nueces River near Three Rivers, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 28

28

29

Dec. 21

22

1910

May 11

12

Made by 

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

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

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

Gage 

height.

Ft. 

16.79

16.21

12.57

27.14

14.34

10.60

14.66

Discharge.

Sec.-ft. 

4,160

3,970

2,860

6,270

2,820

2,200

3,570

Date.

1920.

Jan. 31

Mar. 13

May 9

Made by 

D.A.Dudley..........

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

McCashin and Pritchett

D. A. Dudley..........

Gage 

height

Ft. 

24.95

3.51

2.44

3.02

1.85

2.30

Discharge.

Sec.-ft. 

7,100

296

141

252

67.1

87.3

Daily discharge, in second-feet, of Nueces River near Three Rivers, Tex., for the years 

ending Sept. 80, 1919 and 1920.

Day.

1918-19. 

1. .........

2..........

3..........

4..........

5..........

6..........

7..........

8..........

9..........

10. .........

11..........

19

13

14..........

15..........

16..........

17..........

18..........

19

20..........

21..........

22..........

23..........

24..........

OK

26..........

97

28..........

29.......... in

31..........

Oct.

38

24

30

18

15

14

14

15

15

81

702

1,680

616

KQfi

702

920

596

427

237

173

2,850

8,520

9,780

6,560

3,130

4,650

3,000

2 14/1

2,800

Nov.

4,110

4,970

5,950

7,100

5,500

3,690

4,370

1,940

1,430

446

81

16

14

12

2 OKA

1,640

993

1,190

1 Gfift

1,960

i 740

1,180

436

100

42

20

11

6.2

6.2

6.2

Dec.

4.2

4.2

4.2

4.2

4.2

4.2

4.2

. 2.4

2.4

2.4

2.4

2.4

31

920

304

28

18

418

8,720

11,800

9,820

2,790

3,150

5,760

6,680

2

onn

1,260

1,590

1,840

1,300

566

Jan.

647

476

355

278

158

100

88 '56

34

26

24

24

20

20

16

16

100

42

28

24

16

2,570

7,520

7,620

2,540

2 9WI

3,650

4,050

2,060

1,410

896

Feb.

1,440

1,500

1,520

1,740

3,550

2,850

1,980

1,180

993 fidfi

836

616

546

436

278

245

221

197

165

150

142

128

114

100

88

68

47

38

.......

Mar.

31

28

28

98

28

28

00

42

31

24

24

24

24

20

20

20

16

14

14

14

14

14

14

14

4,110

11 000

14*400

13*500

11,500

7,120

3,340

Apr.

2,850

2,710

6,720

8,850

5,680

2,820

2,260

1,960

1,890 9 lan

2,590

2,470

2,120

1,760

1,620

1,700

1,720

1,450

QOA

418

19fi

74

74

74

fi9

KO

49

34

62

3,650

May.

6,120

2,750

1,380

1,230

1,230

1,230

1,650

3,490

2,240

2,020

2,070

3,910

4,270

3,360

2,610

2,360

3,220

3,890

801

626

77Q

896

993

1,060

2 ion

2

Kf7(\

O^9

691

QW

1,470

1,660

June.

1,770

1,260

1,280

1,360

2,330

2,840

2,610

2,610

2,990

3,220

3,690

3,530

2,990

2,280

1,610

1,320

1,260

1,200

556

253

320

658

1,760

1,770

2,330

6,820

7,860

4,590

2,680

9 Plfifl

July.

3,260

3,040

3,400

4,350

4,250

3,450

4 690

6*260

3,240

1 Qftft

1,660

1 640

1,'830

2,160

1 9t\fi

848

658

526

436

355

229

691

1,070

3,710

7,520

5,160

3,490

5,170

S

oon

5,320

Aug.

3,630

2,330

2,260

1 QKTt

1 84fl

1,700

1,760

1,820

1,880

I

nert

1,580

556

346

189

149

114

100

88

74

62

304

3,450

2,250

790

476

836

1,500

2,660

4,710

6 Qfift

7,910

Sept.

8,380

3,180 1 ftdfl

1,760

1,470

1,330

1,200

1,080

950

fiOM

.......

102723 22 WSP 508 1
94 STJKFACE WATER SUPPLY, 191&-1920, PAET VIII.

Daily discharge, in second-feet, of Nueces River near Three Rivers, Tex.,for the years 

ending Sept. SO, 1919 and 1920 Continued.

Day.

1919-20.

2..........

3..........

4..........

5..........

6..........

7..........

8......-.-.

9..........

10. .........

11..........

12....-....-

13..........

14..........

15..........

16..........

17..........

18..........

19..........

20-........-

21..........

99

23..........

24..........

25..........

26..........

27..........

28..........

29. .........

30-......--.

31..........

Oct.

11,600

9,850

9,100

8,400

7,910

8,550

10,800

11,600

10,800

9,350

7,670

6,450

6,580

7,620

9,250

12,400

13,200

13,500

12,600

11,200

10,400

10,600

Nov. Dec. Jan. Feb.

901;

295

295

978

278

278

278

278

278

261

261

261

956

556

 JJC

Qi o

278

278

261

261

245

245

245

229

213

213

197

197

197

Mar.

1Q7

181

181

181

165

165

165

150

150

150

150

135

135

1QK

-lOC

1QK

135

135

121

121

121

121

121

121

107

107

107

94

94

Apr.

94

QA

94

94

81

81

81

81

68

81

68

81

81

68

68

68

57

57

57

57

47

47

47

47

47

57

94

68

68

47

May.

47

68

81

107

94

68

128

213

329

229

278

99Q

2,980

9 7fift

944

566

896

1,180

920

506

221

189

173

158

158

286

526

355

June.

546

253

546

526

526

824

669

526

270

128

100

88

626

1,230

205

74

74

62

62

253

205

128

74

100

100

74

52

July.

A9

42

34

OQ

6 540

9,650

7,190

6,120

4,550

2,900

1 860 I'eso

1,590

536

245

iiai

135

121

94

81

81

68

68

. 57

57

57

47

47

47

38

Aug.

01 o

01

68

57

57

1 W\

229

99Q

QJC

81

81

81

1 VI

418

O1O

181

278

476

436

436

476

536

616

702

1,240

1,110

1,140

1,260

1,480

1,260

Sept.

97ft

18»

19ft

100

00

74

74

74

100

go

88

62

A9

52

CO1

47

47

00

38

31

34

OQ

28

62

62

47

31

26

22

22

. NOTE. Discharge interpolated Sept. 7-9,1919. No record Sept. 11-14, and 19-30,1919. Medium to high 

stages prevailed during those periods. Sept. 15, 16. 17. and 18. 1919, mean daily gage heights, 30.05, 37.5, 

43.0, and 46.0 feet, respectively; probably affected by backwater caused by high winds from Gulf storm. 

No record Oct. 24,1919, to Jan. 31,1920.

Monthly discharge of Nueces River near Three Rivers, Tex., for the years ending Sept.

30, 1919 and 1920.

Month.

1918-19.

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

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

1919-20.

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

Discharge in second feet.

Maximum.

9,780 

7.100 

11,800 

7,620 

3,550 

14,400 

8,850 

6,120 

7,860 

7,520 

7,910 

8,380

13,500

956 

197 

. 94 

2,980 

1,230 

9,650 

1,480 

270

Minimum.

14 

6.2 

2.4 

16 

38 

14 

34 

626 

253 

229 

62 

824

6,450 

197 

94 

47 

47 

52 

28 

57 

22

Mean.

1,890 

1,790 

1,930 

1,200 

788 

2,110 

1,970 

2,090 

2,410 

2,990 

1,810 

2,180

10,000 

295 

138 

69.3 

510 

301 

1,430 

458 

68.8

Run-off in 

acre-feet.

116, 000> 

107,000 

119,000 

73,800 

43,800 

130, GOO117, 000 

129,000 

143,000 

184,000 

111,000 

43,200

1,320,000

456,000 

17,000 

8,480 

4,120 

31,400 

17,900 

87,900 

28,200 

4,090
NUECES RIVER BASIN. 95 

NUECES RIVER AT CALALLEN, TEX.

LOCATION. At old pump house for city of Corpus Christi, half a mile northwest of 

Calallen, Nueces County, 18 miles west of Corpus Christi, 8 miles above Nueces 

Bay, and half a mile above edge of tidewater and breakwater dam.

DRAINAGE AREA. 16,700 square miles (measured on post-route map and topographic 

map of Texas, compiled in 1899 by Robert T. Hill, of the United States Geological 

Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. August 12, 1915, to September 30, 1920.

GAGE. Vertical staff attached to pipe-line support of old pump house; read by 

Henry Wagner or John Cunningham.

DISCHARGE MEASUREMENTS. Made by wading at the breakwater or from cable 125 

feet below gage.

CHANNEL AND CONTROL. Bed composed of clay and gravel. Channel straight above 

and below station. Left bank wooded, low, and bordered by levee constructed 

to prevent overflow; right bank wooded, medium in height, and not subject to 

overflow. The breakwater dam which is a loose rock fill half a mile below, serves 

as control. It leaks badly and is subject to change during floods. Flood damage 

is repaired by dumping loose rock on the crest.

EXTREMES OF STAGE. Maximum stage during year ending September 30, 1919, 12 

feet in September; minimum stage, 1.80 feet October 9 and March 16-24.

Maximum stage recorded during year ending September 30, 1920, 7.1 feet at 

4 p. m. July 12; minimum stage, 1.60 feet 4 p. m. September 24 to 8 a. m. September 27.

1915-1920: During September, 1919, the river reached a stage of about 12 feet, 

as determined from flood marks on the gage: This was not only the highest stage 

reached during the period covered by records but probably exceeds any that 

occurred for many years prior to the establishment of this station. Discharge 

indeterminate because of lowlands on left bank overflowing for a width of several 

miles. No flow August 23-28, 1918.

ICE. None.

DIVERSIONS. Considerable water taken from river for irrigation immediately above 

station, and river water is also used for irrigation throughout the drainage above. 

The city of Corpus Christi pumps water just below the gage for municipal supply. 

They reported a consumption of 922 acre-feet during 1918.

REGULATION. None of consequence.

ACCURACY. Stage-discharge relation not permanent because of leakage through and 

repair of the breakwater dam. Rating curve is poorly defined, Gage read to 

hundredths twice daily. Daily discharge not computed because of changing 

control and insufficient discharge measurements. Records poor.

The following discharge measurement was made by C. E. Ellsworth: 

April 16, 1919: Gage height, 4.18 feet; discharge, 2,000 second-feet.
96 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily gage height, in feet, of Nueces River at Calallen, Tex.,for the periods, Oct. 1, 1918, 

to Mar, 31, 1919, and Apr. 1 to Sept SO, 1920.

Day.

1918-19. 

1. .........

4..........

5......-.-.

7..........

9......----

10.. ....... -

11........--

19

 IQ

14.... ......

11

1 C

17..........

 to

19..........

10..........

91

22..........

oq

24..........

OK

26..........

27..........

28..........

9O

30.......... 11

Oct.

2.65

2.32

2.12

1.98

1.95

1.90

1.88

1.85

1,80

1.88

1.98

2.30

3.25

4.20

3.75

2.95

2.85

2.80

3.15

2.90

2.85

2.82

3.30

5.30

6.05

6.85

7.42

7.85

7.75

7.68

Nov.

7.18

6.55

5.95

6.15

6.55

6.90

7.20

7.40

6.85

6.00

4.70

3.00

2.55

2.40

2.75

3.12

3.30

3.30

3.30

3.60

3.95

4.30

3.95

s fift

3.00

2.52

2.35

2 22

2.20

2.20

Dec.

2.15

2.10

2.00

2.00

2.00

1.92

1.95

1.95

1.95

1.95

1.95

1.95

1.95

1.90

2.10

2.70

2.65

2.70

3.50

4.35

5.35

6.90

7.65

8.30

8.40

8.10

7.88

6.80

5.75

5.10

4.35

Jan.

3.67

3.15

2.97

2.65

2.60

2.55

2.45

2.32

2.25

2.20

2.17

2.15

2.10

2.10

2.10

2.10

2.22

2.35

2.50

2.50

2.72

2.95

3.80

4 70

6.00

6.90

7.25

6.70

6.20

6.20

5.65-

Feb.

4.10

3.70

3.60

3.82

4.22

4.45

4.85

4.25

3.85

3.60

3.15

2.95

2.90

2.85

2.75

2.60

2.50

2.42

2.35

2.35

2.30

2.30

2.20

2.17

2.15

2.10

2.05

2.00

Mar.

2.05

9 ftfl

2.00

1.95

1 on

1

QA

1.90

1.90

1.85

1.85

1.85

1.85

1.85

1.85

1.82

1.80

1.80

1.80

1.80

1.80

1 80

1 80

1.80

1 80

2.30

3.15

4.25

5.15

6.60

7.35

8.60

Day.

1920. 

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

3...........

4...........

5...........

6...........

7...........

8...........

9...........

10...........

11...........

12...........

13...........

14...........

15...........

16...........

17...........

18...........

19...........

20...........

21...........

22...........

23...........

24...........

25...........

26...........

27 ..........

28...........

29...........

30..........

31.. .........

Apr.

2.20

2.20

2.20

2.20

2.20

2.15

2.10

2.18

2.20

2.20

2.20

2.20

2.20

2.20

2.20

2.20

2.10

2.10

2.10

'2.05

2.05

2.00

2.00

2.00

2.00

2.05

2.00

2.00

2.00

2.10

May.

2.05

2.05

2.05

2.10

2.10

2.20

2.20

2.20

2.40

2.25

2.20

2.55

2.62

2.60

2.50

2.62

3.85

4.05

4.30

3.70

2.95

3.10

3.35

3.25

2.70

2.35

2.25

2.20

2.20

2.20

2.20

June.

2.30

2.45

2.55

2.55

2.40

2.60

2.60

2.70

2.85

2.85

2.65

2.45

2.35

2.15

2.00

2.05

2.50

3.10

3.65

2.15

2.00

1.98

1.90

1.90

2.00

2.10

2.20

2.10

2.00

2.00

July.

2.05

2.00

2.00

2.00

2.00

2.25

4.12

4.60

5.20

5.95

6.70

7.05

6.65

5.70

3.85

2.80

2.40

2.25

2.10

2.10

2.00

2.00

2.00

2.00

2.00

2.10

1.98

1.95

1.72

1.70

2.02

Aug.

2.05

1.95

1.85

1.90

1.90

1.85

1.80

1.80

1.80

1 80

2.00

2.10

2.10

2.05

2.00

2.15

2.20

2.20

2.20

2.10

2.25

2.45

2.45

2.50

2.62

2.82

3.05

3.12

3.15

3.25

3.40

Sept.

3.50

3 on

2.40

2.25

9 IS

2 no

1 Q9

1.88

1.82

1.80

1.82

1 90

1.88

1.85

1.85

1.80

1.78

1.72

1.70

1.70

1.65

1.65

1.65

1.62

1.60

1.60

1.62

1.65

1.72

1.68

NOTE. No gage-height record Apr. 1,1919, to Mar. 31,1920.

FRIO RIVER NEAR DERBY, TEX.

LOCATION. At International & Great Northern Railway bridge 900 feet below mouth 

of Leona River, 400 feet below highway bridge, and 4 miles south of Derby, Frio 

County.

DRAINAGE AREA. 3,500 square miles (measured on post-route map; and topographic 

map of Texas, compiled in 1899 by Robert T. Hill, of the United States Geological 

Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. August 1,1915, to September 30,1920

GAGE. Vertical staff attached to railway bridge pier; read by John A. Head and E. L. 

Willingham.

DISCHARGE MEASUREMENTS. Made from railway bridge or highway bridge or by 

wading.

CHANNEL AND CONTROL. Bed composed of rock, sand, and gravel; channel curved 

above and below station, but straight at gage for 150 feet.. Banks wooded, high, 

and not subject to overflow. A concrete dam, 50 feet below gage, serves as control 

during low and medium stages; position of high-water control not known. 

Point of zero flow, gage height 0.07 foot, except when affected by moss on control.

EXTREMES OP DISCHARGE. -Maximum stage recorded during year ending September 

30,1919,18.5 feet September 18 (discharge not determined); no flow during several long periods.

Maximum stage recorded during year ending September 30, 1920, 10.3 feet 

October 19 (discharge, 4,180 second-feet, determined from extension of rating 

curve); no flow during several periods.

1915-1920: Maximum stage recorded, September 18,1919 (discharge not determined) ; no flow during several periods of each year.

ICE. None.
RIVER BASIN. 97

DIVERSIONS. Small areas are irrigated by diversion in the headwaters, but available 

information does not show that water is taken from the stream immediately above 

the station.

REGULATION. None.

ACCURACY. Stage-discharge relation permanent except when affected by moss on control. Rating curve well defined below 2,000 second-feet; extended above. Gage 

read twice daily to tenths from October 1,1918, to November 6,1919, and March 1 

to September 30, 1920, and to hundredths twice daily from November 7,1919, to 

February 29,1920, and oftener during rapid fluctuations. Daily discharge ascertained by applying mean daily gage height to rating table except from June 12 to 

September 30, 1920, when indirect method for shifting control was used because of growth of moss on control. Discharge for extremely low periods from 

March 1 to September 30, 1920, subject to large error, owing to gage being read 

only to nearest tenth of a foot. Records good except as otherwise noted.

Discharge measurements of Frio River near Derby, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Oct. 25

27

1919.

May 10

Aug. 28

Made by 

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

_

C. E. Ellsworth........

D.A.Dudley..........

Gage 

height.

Ft. 

5.08

.78

.33

5.74

Discharge.

Sec.-ft. 

1,520

65.5

11.3

1,870

Date.

1920. 

Jan. 28

29

May 11

July 16

Made by 

D. A. Dudley..........

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

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

C. E. Ellsworth........

Gage 

height.

Ft. 

0.97

.96

. .56

.19

Discharge.

Sec.-ft. 

102

92.4

35.3

1.1

Daily discharge, in second-feet, of Frio River near Derby, Tex., for the years ending Sept.

SO, 1919 and 1920.

Day.

1918-19. 

1.......

2.......

3.......

4.......

5.......

6.......

7.......

8.......

9.......

10.......

11.......

12.......

13.......

14.......

15.......

16.......

17.......

18.......

1Q

20.......

21.......

22.......

23.......

24.......

25.......

26.......

27.......

28.......

29.......

30.......

31.......

Oct.

32 

162 

680 

312

68

32 

16

8.0

2 7

1.6

g

216 

2,260 

2,880

1,720

260 

52 

22 

16 

8.0 

2.7

Nov.

2.5 

1.8

1.2

.3

Dec.

""774 

3,220

2,540 

684 

400 

1,160 

2,130

508 

186 

77 

41 

22 

15

Jan.

7.3 

4.7 

3.4 

2.0 

1.6

1.4 

1.2 

.9 

.9 

.5

.5

.3

1.4

1.4

1.4 

.7 

.5

.3 

884 

3,550 

3,180 

1,080

227 

103 

964 

872 

435 

162

Feb.

77 

36 

21 

19 

23

62 

175 

84 

41 

23

14 

8.6 

4.0

2.7

2.7

2.7

4.0 

3.4 

3.4

3.4

2.3 

.9 

.7 

.5 

.5

.3

Mar.

--------

6.0

1,170

856 

554 

210 

105 

55

Apr.

49 

213 

65 

233 

118

107 

54 

27 

16 

11

6.0 

2.7 

1.6 

1.2 

.9

.3

i.8

4.0

May.

0.9 

2.7

2.5 

2.0

2.7

1.6 

160 

45 

20 

12

6.7 

4.7 

2.5 

298 

267

152 

722 

1,940 

44 

20

13 

12

5.3 

7.3 

1,110

2,540 

1,700 

1,330 

194 

51 

25

June.

14 

103 

603 

1,030 

152

49 

22 

12 

6.0 

4.0

2.5 

1.8 

1.4 

.7

.5

.5 

1.4

54

278 

77

362 

477 

344 

284 

916

1,550 

1,830 

2,780 

3,340 

3,140

July.

824 

393 

281 

292 

208

194 

162 

663 

2,710 

3,040

900 

502 

379 

284 

227

191 

155 

133 

113 

92

82 

248 

578 

2,280 

3,640

2,740 

1,990 

960 

603 

267 

168

Aug.

113 

86 

68 

57 

52

46 

39 

35 

30

28

24 

21 2*1 

21 

21

18 

16 

13 

10 

8.6

264 

802 

3,380

3,580 

2,540 

1,790 

1,340 

980 

725

Sept.

617 

533 

466 

393 

344

298 

257 

227 

199 

175

155 

138 

122 

109 

418

1,580

3,340

2,480 

1,740 

2,710 

3,740 

4,040

3,340 

3,040 

2,710 

2,360 

2,170
98 SURFACE WATER SUPPL,Y^»L919-1920, PART VIII.

Daily discharge, in second-feet, of Frio River near Derby, Tex., for the years ending Sept. 

30, 1919 and 1920 Continued.

Day.

1920. 

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

2.............

3.............

4.............

5.............

6...........

7............

8...........

9............

10.............

11........... .

12.............

13.............

14.............

15.............

16.......... ..

17.............

18.............

19.............

20.............

21.............

22.............

23.............

24.............

25.............

26.............

27.............

28.............

29.............

30.............

31.............

Oct.

1,810

1 540

L340

1,140

980

940

750

750

i qsn

1,220

980

1,140

1,460

980

980

1,060

1,380

3,360

4,020

3,260

2,760

2,260

1,940

1,720

i idn

1,340

1,140

1,060

1,460

2,560

2,080

Nov.

2

qtA

1,630

1 9 ^Ift

1 460

1 'onn

1,810

680

680

680

715

628

558

505

470

435

418

400

382

348

323

306

284

270

248

230

222

205

194

180

180

Dec.

175

tfiK

158

t KA

145

145

145

140

iqi

1OA

111

105

103

101

QQ

96

88

90

09

QQ

101

101

QQ

88

81

75

72

68

68

65

62

Jan.

62

A9

60

CO

58

60

65

68

A9

CO

A9

79

84

Q4

88

82

77

79

68

66

63

60

63

70

84

Q9

97

96

Q9

86

Feb.

OR

84

89

75

7570

AQ

AQ

AQ

65

65

65

6*

A9

62

60

57

 ss

55

CJ.

51

46

44

42

41

38

Mar.

QC

00

OO

OO

OO

QQ

00

OQ

00

oo

oo

38

38

38

qs

38

27

27

27

27

27

97

27

97

17

22

27

27

27

97

Apr.

07

97

17

17

17

17

17

17

17

17

17

17

13

9.3

Q q

9 q

9

Q

9

0

9 q

Q q

9 q

13

17

17

9.3

9

9

9.3

8.0

6.0

May.

9 7

9 7

2.7

2 7

2 7

2 7

2 7

9

0

RA

126

V)

iq

9 q

9

0

1 140

1 '418 760

116

60

52

32

27

17

17

17

9.3

13

13

9.3

9 q

9.3

June.

6

n

6

f\

2.7

9

O

Q °.

17

17

17

17

17

9

Q

6.0

2

e

2.5

2.5

2.5

2.5

2.5

8.6

2.5

8.0

8.0

2.3

2.3

2

0

2.0

7.3

7.3

7.3

2.0

July.

1

C

1 c

1 C

10

6009

1^

13

12

5.3

2.5

1.4

1.4

1.4

1.4

1.4

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

Aug.

0

0 ,

0

0

0

0

0

0

1.4

1.4

0

0

251

109

81

55

35

24

15

7.3

7.3

7.3

7.3

4.0

7.3

4.0

2.0

2.0

2.0

4.0

Sept.

2 n

2 n

4.0

7 ^

7

Q

7

O

7

0

7 °.

7

0

7

0

7

0

2 0

2 0

2.0

2.0

7.3

4.0

4.0

2.0

4.0

2.0

2.0

2.0

.9

.0

.0

.0

.0

2.0

2.0

NOTE. No flow on days for which discharge is not given except on Aug. 24-25, and Sept. 17-19,1919, 

when stage was above limit for which rating curve is defined. Mean daily gage heights, Aug. 24, 17.00 

feet; Aug. 25,13.10 feet; Sept. 17,12.30 feet; Sept. 18,16.83 feet; and Sept. 19,1919,11.05 feet. Discharge 

above 2,000 second-feet determined from extension of rating curve and subject to error.

Monthly discharge of Frio River near Derby, Tex., for the years ending Sept. SO, 1919

and 1920.

Month.

1918-19.

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

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

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

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

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

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

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

1919-20.

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

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

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

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

Discharge in second-feet.

Maximum.

2,880 

2.5 

3,220 

3.550 

175 

1,170 

233 

2,540 

3,340 

3,640

4,020 

2,310 

175 

97 

86 

38 

27 

1,760 

17 

65 

251 

7.3

4,020

Minimum.

0 

0 

0 

0 

0 

0 

0 

0 

.5 

82

750 

180 

62 

58 

38 

17 

6.0 

2.7 

2.0 

0 

0 

0

0

Mean.

282 

.193 

379 

371 

22.0 

95.4 

30.4 

345 

581 

816

1,620 

665 

108 

72.5 

63.7 

32.3 

13.9 

130 

6.95 

7.48 

20.2 

3.55

230

Run-off 

acre-feet).

17,300 

11.5 

23,300 

22,800 

1,220 

5,870 

1,810 

21,200 

34,600 

50,200

178,000

99,600 

39.600 

6,64a 

4,460 

3,660 

1,990 

827 

7,990 

414 

460 

1.240 

211

167,000
NUECES RIVER BASIN. 99

FRIO RIVER AT FOWLERTON, TEX.

LOCATION. At Frio River dam, half a mile northeast of Fowlerton, LaSalle County, 

1J miles below diversion for Frio Lake storage reservoir, and 8 miles below 

mouth of Jahuey Creek.

DRAINAGE AREA. 4,350 square miles (measured on post-route map, and topographic 

map of Texas, compiled in 1899 by Robert T. Hill, of the United States 

Geological Survey; scale, 1 inch=25 miles).

RECORDS AVAILABLE. July 1, 1915, to August 30, 1919, when station was discontinued because break in levee above gage permitted water to flow around dam 

which served as control.

GAGE. Vertical staff attached to tree on right bank 30 feet above dam; read by 

J. F. Martin and W. H. Newbury.

DISCHARGE MEASUREMENTS. Made by wading below dam, or from railroad bridge 

a mile above.

CHANNEL AND CONTROL. Channel straight for some distance above the station, but 

slightly curved below; banks about 5 feet high and not subject to overflow 

except during extremely high water; right bank cultivated; left bank wooded. 

Concrete dam about 30 feet below gage serves as permanent control at all stages, 

except when levees above dam were broken (see footnote to table of daily 

discharge). Point of zero flow, gage height 0.10 foot.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 30, 1919, 5.00 feet at 11 a. m. August 26 (discharge, 4,000 second-feet, determined from extension of rating curve. On August 27, 28, and September 14-20, 

stage was above 5 feet, but gage could not be reached because of high water. 

No flow for extended periods.

1915-1919: Maximum stage recorded in 1919 (see above); no flow during parts 

of each year.

ICE. None.

DIVERSIONS. Some water diverted for irrigation above station. A diversion for the 

Frio Lake reservoir is made 1£ miles above; other diversions are scattered; 

amount diverted and areas irrigated not known. A large part of the irrigated 

land in the drainage basin above the station is watered by wells.

REGULATION. Flow regulated by the diversion into Frio Lake a short distance 

above gage; extent of regulation above Frio Lake diversion not known but 

probably small.

ACCURACY. Stage-discharge relation permanent except for periods when break 

in levee permitted water to flow around end of dam which serves as control as 

noted in footnote to daily-discharge table. Rating curve fairly well defined 

below 1,600 second-feet, and extended above. Gage read to hundredths once 

daily. Daily discharge ascertained by applying mean daily gage height to rating 

table except as indicated in footnote to table of daily discharge. Records fair.

Discharge measurements of Frio River at Fowlerton, Tex., during the year ending Sept. 30,

1919,

Date.

Oct. 25

27

Made by height.

Ft. 

2.97

1.33

Dis. 

charge.

Sec.-ft. 

1,600

348

Date.

May 11

Made by 

C. E. Ellsworth........

Gage 

height.

Ft. 

0.30

1.39

Discharge.

Sec.-ft. 

12.1

«897

Water flowing around end of dam which ordinarily acts as control.
100 SUEFACE WATEE SUPPLY, 1919-1920, PAET VIII.

Daily discharge, in second-feet, of Frio River at Fowlerton, Tex., for the year ending

Sept. 30, 1919.

Day.

1... .......

2..........

3..........

4..........

5..........

6..........

7..........

8..........

9..........

10..........

11..........

12..........

13..........

14..........

15..........

16..........

17..........

18..........

19..........

20..........

21..........

22..........

23..........

24..........

25..........

26..........

27..........

28..........

29..........

30..........

31..........

Oct.

0

0

0

0

0

0

0

0

0

0

56

78

105

100

94

52

0

0

0

0

0

868

755

642

1,500

1,420

365

Nov.

0

0

0

0

0

0

0

Dec.

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

564

932

980

2,160

1,100

600

387

432

1598

137

83

44

oq

Jan.

15

8.4

3.0

2.4

1.2

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1,590

1,840

2,270

1,200

225

52

30

325

201

Feb.

48

10

0

0

1Q

6.6

6

0

0

0

0

0

Mar.

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1,640

2,100

Sfifl

570

480

193

74

Apr.

201

150

444

365

315

185

100

52

20

8.4

3.0

1.8

1.8

1.8

1.2

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

150

May.

185

117

60

26

56

48

37

26

20

15

15

15

12

10

10

185

178

164

528

325

164

64

10

88

117

315

614

1,040

355

150

dn

June.

30

1,110

996

325

552

398

74

30

12

3.0

1.2

0

0

0

0

0

0

0

0

143

164

178

243

325

468

852

1,200

1,320

1,420

1,840

July.

2,170

2,070

387

306

315

297

193

130

270

852

1,540

1,500

420

315

234

157

117

88

69

60

69

69

456

712

1,080

1,840

2,560

2,550

1,540

740

243

Aug.

143

88

60

44

33

26

20

18

15

15

12

10

8.*

8.4

6.6-

6.6

4.8-

3.0-

2.4

1.8

1. *

.&

288

564

2,270

3,980

897

NOTE. No record Oct. 23, 28-31. Nov. 1-23, Feb. 7-22, Aug. 27-29, and 31, and Sept. 1-30, caused 

principally by flood washing around end of dam which serves as control. Discharge interpolated, Oct. 23, 

On Aug. 27, 28, and Sept. 14-20 gage height exceeded 5 feet, but observer could not read gage on account 

of high water.

Monthly discharge of Frio River at Fowlerton, Tex., for the year ending Sept. SO. 1919.

Month.

October 1-27. .....................................'......

November 24-30.. . .......................................

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

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

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

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

Discharge in second-feet.

Maximum.

0 

2,160 

2,270 

2,100 

444 

1,040 

1,840 

2,560

Minimum.

0 

0 

0 

0 

0 

0 

10 

0 

60

Mean.

224 

0 

257 

250 

191 

66.7 

161 

389 

753

Run-off in 

acre-feet.

12,000 

ft 15,800- 

15.400' n,7oa

3,970 

9,900 23,100' 

46,300-

NOTE. See footnote to daily-discharge table.

FRIO LAKE OUTLET NEAR FOWLERTON, TEX.

LOCATION. At Frio Lake dam, 2 miles northeast of Fowlerton, La Salle County,, 

and 1J miles northeast of gaging station on Frio Eiver.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. July 1, 1915, to August 30, 1919, when station was discontinued because break in levee above gage permitted water to flow around dam. 

which served as control.

GAGE. Vertical staff attached to post on right bank about 100 feet above dam; read 

by J. F. Martin and W. H. Newbury.
NTJECES RIVER BASIN. 101

DISCHARGE MEASUREMENTS. Made by wading below dam or from railroad bridge 

about a mile above gage.

CHANNEL AND CONTROL. Channel straight above and below station for some distance. Right bank clean, cultivated, about 8 feet high; left bank is wooded 

and is from 5 to 8 feet high; neither bank subject to overflow. Concrete dam 

about 100 feet below gage serves as control at all stages except when levees above 

dam were broken (see footnote to daily-discharge table). Point of zero flow 

at zero gage height.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30,1919, 3.70 feet on August 27, and again in September (discharge, 5,230 secondfeet); no flow for extended periods.

1915-1919: Maximum stage recorded in 1919 (see above); no flow for extended 

periods each year.

ICE. None reported.

DIVERSIONS. Lake is used for storage. Capacity not known.

REGULATION. Flow controlled at intake on Frio River some distance above; flow 

of Frio River above this diversion probably not regulated.

ACCURACY. Stage-discharge relation practically permanent. Rating curve well 

defined below 4,500 second-feet; above this, subject to considerable error. 

Gage read to hundredths once daily; one daily gage reading may not be true 

index of the mean daily discharge. Daily discharge ascertained by applying 

gage height to rating table. Records fair. Floods washed around end of dam 

which serves as control, causing loss of records as noted in footnote to dailydischarge table.

Frio Lake is a storage reservoir fed by a diversion from Frio River. The diversion 

is made 1£ miles above the Frio River dam and the gaging station on the river. Thewater released from the lake is used for irrigation. This station is maintained in 

conjunction with that on Frio River at Fowlerton to show the total run-off at that point.

Discharge measurements of Frio Lake outlet near Fowlerton, Tex., during the year ending

Sept. 30, 1919.

Date.

Oct. 26

27

Made by- Gage 

height.

Feet. i <y\

.77

Discharge.

Sec.-ft. 

1,050

272

Date.

May 11

Aug. 30

Made by- Gage 

height.

Feet. 

0.15

1.02

Discharge*

Sec.-ft. 

18. T

o635

a Levee at end of dam broken and water flowing around dam.
102 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Frio Lake outlet near Fowlerton, Tex., for the year

ending Sept. SO, 1919.

Day.

1. .......

2........

3........

4........

5........

6........

7. .......

8........

9........

10........

11........

12........

13........

14........

15........

16. .......

17........

18........

19........

20........

21........

22. .......

23........

24........

25........

26........

27........

28........

29........

.30. .......

01.1........

Oct.

0

0

0

0

0

0

0

0

0

0

68

112

161

151

140

60

60

0

0

0

0

903

699

495

855

980

OQO

Nov.

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Dec.

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

166

575

819

1,400

7QK

312

387

680

OfO

107

48

38

27

Jan.

19

12

9.0

6.0

4.8

3.6

3.6

2.4

1.2

1.2

0

0

0

0

0

0

0

0

0

0

0

0

1 94/1

1,010

1,810

967

211

107

56

405

166

Feb.

72

9.2

2.4

1.2

97

1.2

6

0

0

0

0

Mar.

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1,040

1,500

617

387

286

1QK

48

Apr.

312

234

299

312

187

107

64

38

22

16

9.2

6.0

6.0

4.8

2.4

1.2

1.2

0

0

0

0

0

0

0

0

0

0

0

0

27

May.

56

43

32

19

27

27

32

27

22

16

14

12

9.2

9.2

4.8

88

80

72

299

107

56

22

6.0

43

48

80

457

638

555

27

June.

22

422

714

166

299

116

38

19

12

6.0

4.8

3.0

1.2

0

0

0

0

0

0

32

32

97

234

357

457

535

617

855

967

1,040

July.

1,340

1,400

312

269

272

116

80

64

211

617

1,020

1,040

246

135

116

88

72

48

43

38

48

107

187

286

357

915

1,640

1,500

749

OQQ

116

Aug.

66

43

43

32

27

22

19

19

16

16

12

12

9.2

6.0

6.0

4.8

4.8

3.6

2.4

1.2

1.2

43

135

2,130

3,040

495

NOTE. No record Oct. 28-31, Nov. 1-7. Feb. 8-22, Aug. 27-29, 31, and Sept. 1-30. Floods washed 

.around end of dam in February and again in August. Gage not read Oct. 23; discharge interpolated.

Monthly discharge of Frio Lake outlet near Fowlerton, Tex., for the year ending Sept.

30, 1919.

Month.

October 1-27 .............................................

November 8-30. ... .......................................

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

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

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

August 1-26. .............................................

Discharge in second-feet.

Maximum.

903 

0 

1,400 

1,810 

1,500 

312 

638 

1,040 

1,640 

3,040

Minimum.

0 

0 

0 

0 

0 

0 

4.8 

0 

38 

1.2

Mean.

184 

0 

183 

195 

129 

55.0 

102 

235 

443 

220

Run-off in 

acre-feet.

9,850 

0 

11,300 

12,000 

7,930 

3,270 

6,270 

14,000 

27,200 

11,300

BIO GBANDE BASIN. 

RIO GRANDE NEAR SAN MARCIAL, N. HEX.

LOCATION. In sec. 19, T. 7 S., R. 1 W., at Atchygpn, Topeka & Santa Fe Hallway 

bridge 1 mile south of San Marcial. No important tributaries in immediate 

vicinity of station.

DRAINAGE AREA. Not measured.

KECORDS AVAILABLE. January 29, 1895, to September 30, 1920.
RIO GRANDE BASIN. 103

OAGE. Inclined staff established January 29, 1895, and destroyed by flood in 1896. 

Wire gage established in its place at same datum. This was soon abandoned and 

gage heights have since been obtained by measuring with graduated rod from 

bridge deck to water surface. Gage datum unchanged.

DISCHARGE MEASUREMENTS. Made from the bridge.

CHANNEL AND CONTROL. Bed sandy and very shifting; broken by several bridge 

piers. No information on control section.

EXTREMES OP DISCHARGE. Maximum mean daily stage during year ending September 30, 1919, 15.3 feet on May 12 (discharge, 12,700 second-feet); no flow October 

1-19, August 31 to September 20.

Maximum mean daily stage during year ending September 30, 1920, 16.1 feet 

from May 27 to June 4 (discharge, 22,500 second-feet); no flow September 14 to 

18.

1895-1920: Maximum mean daily discharge, 33,000 second-feet on October 11, 

1904 (gage-height, 13.75 feet); no flow for periods of varying length each year.

DIVERSIONS. Considerable water diverted for irrigation above station.

ACCURACY. Stage-discharge relation not permanent; affected by ice during winter 

1918-19. Owing to the shifting control, determinations of daily discharge are 

based almost entirely on frequent current-meter measurements.

COOPERATION. Records furnished by United States Reclamation Service, and reduced to three significant figures by United States Geological Survey.

Daily discharge, in second-feet, of Rio Grande near San Mardal, N. Mex., for the years 

ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2...........

3...........

4...........

5...........

6...........

7...........

8...........

9...........

10...........

11...........

12...........

13...........

14...........

15...........

16...........

17...........

18...........

19...........

20...........

21...........

22...........

23...........

24...........

25...........

26...........

27...........

28...........

29...........

30..........

31...........

Oct.

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

20

580

500

540

540

497

540

500

460

500

478

Nov.

450

420

322

340

317

318

295

292

285

350

342

380

430

481

WXl

442

496

445

520

515

600

AA.F*

520

320

320

dn*\

421

A4*3

Dec.

550

670

650

480

478

460

520

497

440

J.7K

520

670

690

680

707

730

620

KAC

690

670

670

AQK

1 9Ort

1,020

670

670

670

670

670

635

Jan.

608

551

494

437

380

323

266

209

268

327

385

477

KCQ

681

681

681

682

682

683

684

685

686

670

ftfiO

660

658

656

fiCA

652

650

648

Feb.

667

686

704

695

685

675

675

534

462

520

638

6%

638

638

638

534

534

534

610

610

685

685

732

960

673

KJ.Q

Mar.

549

475

475

475

An K

,17 K

810

810

664

579

570

560

551

KK-I

R4.9

1,340

1,150

1,060

940

2 4QO

3' 860

3,720

2,750

2

1 on

1 960

1 450

1*450

1,520

1.930

Apr.

2,180

S

oon

3,050

2,880

2,880

2

QCfl

3,140

4,240

3,340

3

QAA

3,380

3,920

3,830

3 74A

3.570

3,870

4,720

4,870

6,830

7,100

8,790

10,200

8 790 io'7nn

11,600

1 9 1ftfl

May.

11,100

9,120

7,100

7,250

7,520

7,700

7,700

8,630

9,580

8,520

8,100

7,590

7 9fin

6,280

5,730

5,730

5,730

5,960

6,300

6,300

6,550

6 <inn

8,120

9 snn

10,400

10,800

10,700

9 780

8^720

7.950

June.

7,580

7,580

8,050

6,530

5,020

<1 Vfl

2,420

2,420

2,050

1,810

1,320

1,320

1,440

1,410

1,430

1 460

1*480

1,770

1,600

1,770

1,770

1,790

1,820

1,620

1,420

1,320

2

KAf)

4,890

1,230

July.

1,440

2,100

3,100

2,820

7,840

3,600

2,360

2,610

2,610

2,840

5,440

2,960

2 <av»

2,280

6,350

8,450

6,200

7,180

8,020

8,250

6,280

5,680

6,280

5 Cftft

2 ?ftn

1,910

1 Wi

1,100

1,200

1 Mt\

2.340

Aug.

2,180

7,600

4,260

4,260

3,980

2,300

1,430

1,720

1,420

1,420

1,010

1,010

1,010

585

585

585

585

585

1,040

1,150

830

385

OKA

155

90

70<*n

10

2

0

Sept.

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

526

480

434

388

^49

295

OQK

295

196

IQfi
104 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Rio Grande near San Martial, N. Mex., for the years 

ending Sept. 30, 1919 and 1920 Continued.

Day.

1919-20. 

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

2...........

3...........

4...........

5...........

6...........

7...........

8...........

9...........

10...........

11...........

12...........

13...........

14...........

15...........

16...........

17...........

18...........

19..........

20...........

21...........

22...........

23...........

24. . .......

25...........

26...........

27...........

28...........

29...........

30...........

31...........

Oct.

165

165

137

137

111

106

101

96

91

1,460

1,250

1,250

1,040

790

739

739

680

615

615

602

589

576

577

578

579

579

472

472

472

472

550

Nov.

523

497

470

461

453

444

444

550

550

795

795

749

749

749

749

708

695

682

670

670

670

740

740

740

845

860

750

680

820

898

Dec.

OQQ

7O4

794

7<U

7O4

QSfi

980

QOA

1.160

1,160

958

958

858

858

858

858

858

1,040

980

910

849

847

846

845

831

816

802

868

868

SAG

Jan.

794

794

794

771

74O

726

647

647

647

595

595

682

682

770

950

1,480

1,400

1,140

on?

838

838

838

838

842

842

842

835

835

840

846

OKI

Feb.

851

872

872

Qflfi

941

071;

975

1' 3nn

1,300

1,300

1,680

1,680

2,230

1 600

l'430

1,090

1,090

C7Q

87Q

879

997

QO7

997

1,960

4,840

4,110

2,700

2,160

1,710

Mar.

1,710

1,710

1,110

1,110

1,110

1,130

1,130

1,130

1.130

1,110

1,110

1,080

1,080

1,080

1,080

1,080

1,080

1,080

1,090

1,090

1,090

1,370

1,460

2,370

2,610

2,430

1,930

1,640

1,580

1,520

1,300

Apr.

i <?nn

1,360

2,110

1,650

1,380

1,280

1,190

Qfifl

1,000

1,440

2,900

3,480

3,270

3,110

3,710

3,620

4,320

3,740

3,740

3,620

2,740

2,080

1,890

1,800

1,800

1,840

2,090

2,370

2,090

1 ' 920

May.

1,760

1.760

4 600

5^280

5,160

5,280

6,400

6,200

8,020

7,800

8,950

11,000

13,200

11,300

11,800

12,600

11,100

10,200

8,620

7,500

7,500

9,250

12,200

13,100

13,400

14,900

22,500

22,500

22,500

22-, 500

22,500

June.

92 500

22^500

22,500

22,500

21,500

21,500

21,500

21,500

21,000

19,400

18,700

18,100

16,800

15,800

14,900

13,900

13,000

12,000

11,200

10,500

9,990

9 100

8^160

7,250

6,820

6,370

6,700

6,070

5,650

7 ' 430

July.

7,750

8,400

8,100

7,120

6,900

6,150

5,680

5,400

4,650

3,620

3,280

2,880

2,360

2,080

1,830

1,500

1,380

1,380

1,130

880

880

780

600

587

567

547

527

507

460

450

391

Aug.

391

391

335

950

940

1,120

740

615

575

575

615

625

760

665

690

723

723

665

625

640

750

740

725

900

750

580

475

410

370

320

245

Sept.

185

185

lOC

185

15$

121 112-

8850-

30

24

1&

»

o

0

0

0

0

22

50

70

14&

200

200

205

210

170

130

120

111

NOTE. River frozen over Dec. 26,1918, to Jan. 7,1919; discharge estimated.

Monthly discharge of Rio Grande near San Martial, N. Mex., for the years ending Sept.

30, 1919 and 1920.

Month.

1918-19.

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

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

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

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

1919-20.

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

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

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

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

Discharge in second-feet.

Maximum.

580 

600 

1,290 

686 

960 

3,860 

12,700 

11,100 

8,050 

8,450 

7,600 

526

12,700

1,460 

898 

1,160 

1,480 

4,840 

2,610 

4,320 

22,500 

22,500 

8,400 

1,120 

210

22,500

Minimum.

0 

285 

440 

209 

 462 

475 

2,180 

5.730 

1,230 

1,100 

0 

0

0

91 

444 

794 

595 

851 

1,080 

960 

1,760 

5,650 

391 

245 

0

0

Mean.

179 

408 

662 

560 

638 

1,230 

5,290 

7,920 

2,810 

4,030 

1,330 

115

2,110

542 

672 

896 

834 

1,520 

1,370 

2,330 

11,000 

14,500 

2,860 

633 

99.3

3,100

Run-off in. 

acre-feet.

11,000 

24,300 

40,700 

34,400 

35,400 

75,600 

315,000 

487,000 

167,000 

248,000 

81,800 

6,840

1,530,000

33,300 

40,000 

55,100 

51,300 

87,400 

84,200 

139,000 

676,000 

863,000 

176,000 

38,900 

5,910

2,250,000
RIO GBANDE BASIN. 105

RIO GRANDE BELOW ELEPHANT BUTTE DAM, N. MEX.

LOCATION. In T. 13 S., R. 4 W., 1 mile below Elephant Butte dam, in Sierra County.

Nearest tributary, Mescal Canyon, enters half a mile downstream. 

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. October 1, 1916, to September 30, 1920. 

GAGE. Stevens water-stage recorder on left bank, 1 mile below dam. 

DISCHARGE MEASUREMENTS. Made frpm car and cable at gage. 

CHANNEL AND CONTROL. Bed composed of compact gravel; probably permanent.

Control at gravel bar at mouth of Mescal Canyon, which shifts. 

ICE. Stage-discharge relation not affected by ice. 

REGULATION. Flow controlled by Elephant Butte dam which forms reservoir having

capacity of 2,638,000 acre-feet. 

EXTREMES OF DISCHARGE. No data. 

COOPERATION. Records furnished by United States Reclamation Service, and

reduced to three significant figures by United States Geological Survey.

Daily discharge, in second-feet, of Rio Grande below Elephant Butte dam, N, Mez., for 

the years ending Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5..............

6. .............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23....'..........

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

1,080

1,060

1,050

1,050

1,050

1,010

1,030

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

1,020

425

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Nov.

1,020

910

785

750

680

575

540

570

700

700

685

685

670

248

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Dec.

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

Jait

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

15

Feb.

15

15

15

15

15

15

15

15

15

300

450

450

450

450

540

628

700

753

753

753

726

593

593

593

CQQ

596

583

568

Mar.

572

568

695

785

777

800

806

800

814

806

800

800

806

792

770

765

990

982

998

998

998

998

998

998

OQQ

998

998

998

998

oon

998

Apr.

1,040

1,040

1,060

1,060

1,090

1.150

1,040

1,080

1,080

1,090

1,090

1,110

1,110 i nan

1,110

507

15

531

1,110

1,150

1,140

1 180

1 340

1^600

2 (WI

2,100

2 140

2^160

2 180

2 91(1

May.

2,220

2,250

2,270

2,270

2,300

2,300

2,320

2,320

2,150

2,050

2,120

2,010

1,820

1,860

1,860

1,880

1,880

1,880

1,880

1,900

1,900

1,900

1,900

1,900

1,920

1,930

1,940

1,950

1,730

1 QCA

1.960

June.

1,980

1,980

2,000

1,910

1,860

1,860

1,860

1,870

1,870

1,870

1,880

1,880

1,880 i son

1,880

1,880

1,880

1,880

1,880

1,880

1,880

1,880

1,880

1,880

1,880

1,880 i 7>5n

1,880

i ftftn

1 OQn

July.

1,900

1,480

1,900

1,900

1,900

1,900

1,880

1,860

1,900

1,900

1,900

i win

1,900

1 800

1^630

1,460

1,270

1,200

1,210

1,220

1,220

1,230

1,300 i ^nn

1,280

1,180

1,170

i ion

1,200

1,200

1.420

Aug.

1,750

1,750

1,770

1,780

1,780

1,780

1,670

1,750

1,730

1,720

1,540

1,200

1,210

1,210

1,220

1,220

1,240

1,250

1,370

1,320

1,440

1,420

1,420

1,420

1,420

1,420

1,420

1,420

1,420

1 440

1.440

Sept.

1,440

1,440

1,440

1,450

1,450

1,440

1,440

1,420

1,420

1,410

1,400

i 4on

1,400

1,400

1,400

1 200

l'l20

1,080

1,060

1 060

1 060

I'oeo OCrt

610

605

605

605

605

605

605
106 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Rio Grande below Elephant Butte dam, N. Mex.,for 

the years ending Sept. 30, 1919 and 1920 Continued.

Day.

1919-20.

2..............

K

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16. .............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25. .............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

605

605

605

605

605

605

605

605

605

202

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

Nov.

473

710

710

710

710

851

910

910

910

910

910

341

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

Dec.

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

333

500

.500

500

Jan.

500

500

500

500

500

613

888

888

888

645

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

3

2

Feb.

2

3

2

3

2

3

2

3

2

3

2

3

117

200

547

720

720

720

720

720

720

720

720

720

720

810

855

855

855

Mar.

855

903

960

992

1,020

1,020

1,010

1,010

1,010

1,010

1,100

1,080

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,090

1,060

894

965

Apr.

965

950

950

950

950

1,050

1,100

1,230

1,280

1,460

1,700

1,700

1,630

1,500

1,500

1,500

1,510

1,630

1,690

1,690

1,690

1,690

1,690

1,780

1,840

1,840

1,840

1,840

1,880

1,880

May.

1,820

1,760

1,760

1,760

1,760

1,760

1,760

1,760

1,770

1,780

1,780

1,800

1,800

1,810

1,810

1,810

1,810

1,820

1,820

1,920

2,000

2,000

2,000

2,000

2,000

2,000

2,000

1,900

1,820

1,820

1,820

June.

1,830

1,840

1,860

1,860

1,820

1,820

1,820

1,820

1,820

1,820

1,920

1,960

1,960

1,960

1,960

1,960

1,960

1,960

1,960

1,960

1,960

1,980

2,000

2,000

2,000

2,000

2,000

1,900

1,900

1,900

July.

1,880

1,880

1,880

1,880

1,880

1,880

1,900

1,900

1,900

1,900

1,900

1,900

1,900

1,900

1,900

1,910

1,920

1,930

1,930

1,980

2,030

2,030

2,030

2,030

2,030

2,030

2,030

2,030

2,030

2,030

2,030

Aug.

2,030

2,000

2,020

2,080

2,120

2,170

2,080

2,010

2,010

2,000

2,030

2,040

2,040

2,040

2,040

2,040

2,040

2,010

2,010

2,040

1,800

1,560

1,560

1,560

1,560

1,210

1,090

1,210

1,210

1,320

1,480

Sept.

1,480

1,470

1,460

1,640

1,740

679

1,710

1,700

1,700

1,700

1,700

1,740

1,740

1,730

1,720

1,710

1,710

1,700

1,760

1,920

1,920

1,940

1,940

1,920

1,920

1,940

1,940

1,940

1,940

1,940

Monthly discharge of Rio Grande below Elephant Butte dam. N. Mex.,for the years ending

Sept. 30, 1919 and 1920.

Month.

1918-19.

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

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

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

The year

1919-20.

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

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

Discharge in second-feet.

Maximum.

1,080 

1,020 

15 

15 

753 

998 

2,210 

2,320 

2,000 

1,900 

1,780 

1,450

2,320

605 

910 

500 

888 

855 

1,090 

1,880 

2,000 

2,000 

2,030 

2,170 

1,940

2,170

Minimum.

0 

0 

15 

15 

15 

568 

15 

1,730 

1,750 

1,170 

1,200 

605

0

2 

2 

2 

2 

2 

855 

950 

1,760 

1,820 

1,880 

1,090 

679

2

Mean.

547 

335 

15 

15 

400 

874 

1,260 

2,020 

1,880 

1,540 

1,480 

1,140

961

184 

303 

61.3 

209 

395 

1,040 

1,500 

2,170 

1,920 

1,950 

1,820 

1,730

1,110

Run-oft in 

acre-feet.

33,600 

19,900 

922 

922 

22,200 

53,700 

75,000 

124,000 

112,000 

94,700 

91,000 

67,800

696,000

11,300 

18,000 

3,770 

12,900 

22,700 

64,000 

. 89,300 

133,000 

114,000 

120,000 

112,000 

103,000

fe. 804,000
RIO GRASTDE BASIN. 107

RIO GRANDE ABOVE PRESIDIO, TEX.

LOCATION. About 2 miles above the Haciendita, 7 miles above Rio Conchos, and 

10 miles west of Presidio post office. From May 22,1900, to September 25, 1905, 

and from July 7, 1909, to September 30, 1913, station was maintained at the 

Haciendita, 9 miles above Presidio and 8 miles above mouth of Eio Conchos. 

From September 26, 1905, to July 6, 1909, station was 8 miles farther upstream. 

As no tributaries of consequence enter between the three sites, the flow is practically the same at all of them.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. May 22, 1900, to March 31, 1914, and September 1, 1919, to 

March 31,1920.

GAGE. Inclined staff. Relation between the gage readings at the different sites 

not known. W. P. Millington, observer.

DISCHARGE MEASUREMENTS. Made from cable and car about 600 feet above gage.

CHANNEL AND CONTROL. Channel straight for 1,000 feet above the .gage. Right and 

left banks of medium height and steep. Bed composed of mud and sand and 

shifts greatly.

EXTREMES OF DISCHARGE. September 1, 1919, to March 31, 1920; maximum discharge 18,100 second-feet, September 15 and 16; minimum discharge, 13 secondfeet, January 9, 1920.

DIVERSIONS. Considerable water diverted at Elephant Butte dam, and other points 

above the station, for irrigation; total amount not known. Records of the 

Board of Water Engineers for the State of Texas shows that about 180,000 acres 

were irrigated in 1920 in Texas by diversions below the station, practically all 

of which are in Hidalgo and Cameron counties.

REGULATION. Flow largely regulated by storage at Elephant Butte dam, 120 miles 

above El Paso.

ACCURACY. Stage-discharge relation not permanent. Daily discharge based almost 

entirely on frequent measurements.

COOPERATION. Station maintained and records furnished by the United States section of the International Boundary Commission.

Discharge measurements of Rio Grande above Presidio, Tex.,for the period Sept. 2, 1919,

to Mar. SO, 1920.

[Made by engineers of the United States section of the International Boundary Commission.]

Date.

1919.

8........

11........

14........

15........

Oct. 3........

6........

9........

12........

15........

18........

21........

24........

27........

30........

Nov. 2........

5........

8........

Gage 

height.

Feet. 

4.3

4 1

3.9

5.6

7.7

16.0

5.7

5.8

5.7

6.0

5.8

5.9

5.8

5.3

5.0

4.8

5.2

4 Q

4 7

Discharge.

Sec.-ft.

80

43

33

613

1,955

18.080

520

568

484

7fiO

fyfyl

696

552

374

252

201

418

91 Q

151

Date.

1919. 

Nov. 11........

14........

17........

20........

23........

26........

29........

Dec. 18........

21........

24........

27........

30........

1920.

6........

9........

12........

15........

Gage 

height.

Feet. 

4.6

4.4

4.8

5.2

5.2

4.8

4.7

4.3

4.3

4.3

4.2

4.2

4.1

4.1

4 1

4.2

5.6

Discharge,

Sec.-ft. 

119

67

122

223

204

122

93

29

33

29

20

18

17

15

13

15

257

Date.

1920. 

Feb. 3........

6........

9........

12........

15........

18........

22........

24........

28........

Mar. 3........

6........

9........

12........

18........

21........

24........

27........

30........

Gage 

height.

Feet. 

4.6

4.6

4.6

4.5

4.5

4.4

4.3

4.3

4.6

4.9

4.4

4.2

4.1

A. Q

5.2

5.2

5.1

5.0

Discharge.

Sec.-ft. 

43

39

30

26

28

24

22

10

49

86

46

28

23

92

153

153

130

121
108 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Rio Grande above Presidio, Tex., for the period Sept. 1,

1919, to Near. SI, 1920.

Day.

1. ..

2.

3. .

4. .

5. .

6. .

7. .

8. .

9. .

10. .

11. .

12.

13. .

14. .

15. .

Sept.

89

89

89

56

43

43

40

33

550

578

613

784

1,528

1,955

18,080

Oct.

520

520

520

520

568

568

568

484

484

636

682

762

762

544

544

Nov.

378

418

418

380

219

219

200

151

151

119

119

119

85

67

67

Dec.

93

93

87

87

58

58

58

37

37

37

37

29

29

29

29

Jan.

17

17

17

17

15

15

15

14

13

14

15

15

257

257

257

Feb.

43

43

43

43

39

39

38

34

30

30

30

26

26

28

28

Mar.

86

86

86

46

46

46

28

28

28

28

23

23

23

23

67

Day.

16. .

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29.

30. ?l oi.. ....

Sept.

18,080

034

934

628

628

613

613

759

759

759

837

837

624

624

520

Oct.

544

596

506

596

552

552

552

374

374

300

250

252

252

201

201

378

Nov.

122

122

174

174

223

223

204

204

162

122

122

122

104

93

93

Dec.

29

29

29

33

33

33

29

29

29

28

24

20

19

18

18

18

Jan.

378

378

401

401

401

122

122

94

94

94

56

56

56

43

43

43

Feb.

24

24

24

24

22

22

22

20

19

19

28

36

49

49

Mar.

67

92

92

92

153

153

153

153

153

153

130

130

130

121

121

121

Monthly discharge of Rio Grande above Presidio, Tex., for the period Sept. 1, 1919, to

Mar. 31, 1920.

Month.

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

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

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

Discharge in second-feet.

Maximum.

18,100 

762 

418 

93 

401 

49 

153

Minimum.

33 

201 

67 

18 

13 

19 

23

Mean.

1,760 

492 

179 

39 

121 

31 

86

Run-off In 

acre-feet.

105,000 

30,300 

10,700 

2,400 

7,440 

1,780 

5,290

163,000

NOTE. Monthly discharge computed by engineers of U. S. Geol. Survey. 

RIO GRANDE BELOW PRESIDIO, TEX.

LOCATION. At west end of canyon section of Rio Grande, 7 miles below Presidio 

at Loma Paloma, 8 miles below mouth of Rio Conchos, and 1 mile above 

mouth of Alamito Creek. Discharge at this station, minus discharge at station 

above Presidio, is discharge of Rio Conchos, except occasionally, when some 

run-off enters Rio Grande from north.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. May 1, 1900, to July 31, 1915; September 1, 1919, to March 

31, 1920.

GAGE. Vertical staff in main channel; read by W. T. Millington. At low stages 

river shifts back and forth in its bed, necessitating establishment of temporary 

gages. Relation between this gage and previous gages not known.

DISCHARGE MEASUREMENTS. Made in main channel from car and cable and in overflow section from boat.

CHANNEL AND CONTROL. Shifting sand; affected by an intermittent stream, Alamito 

Creek, which reaches the river 1 mile below the station. This creek is subject 

to torrential floods which bring large quantities of boulders and gravel into the 

Rio Grande, forming a temporary dam which causes changes in the stage-discharge 

relation. The channel overflows at gage height 7 feet to an extreme width of 1,000 

feet, where gravel hills are found.
BIO GRANDE BASIN. 109

EXTREMES OF DISCHARGE. September 1, 1919, to March 31, 1920: Maximum discharge, 53,638 second-feet, September 1-3; minimum discharge 1,019 second-feet, 

March 30 and 31.

Below the mouth of the Rio Conchos the Rio Grande is subject to severe floods 

from this tributary. Since the records have been maintained, the highest flood 

occurred September 11, 1904, reaching a stage of 26.35 feet and a discharge of 

149,200 second-feet. On the same day the discharge above Rio Conchos was 

only 2,600 second-feet.

ICE. None.

DIVERSIONS. Considerable water diverted at Elephant Butte dam and other points 

above the station for irrigation. Total amount not known. Records of the 

Board of Water Engineers for the State of Texas show that about 180,000 acres 

were irrigated in Texas in 1920 by diversions below the station, practically all 

of which are in Hidalgo and Cameron counties.

REGULATION. Flow partly regulated by storage at Elephant Butte dam, 120 miles 

above El Paso.

ACCURACY. Owing to shifting channel the determinations of daily discharge is based 

almost directly on frequent current-meter measurements.

COOPERATION. Station maintained by the United States section of the International 

Boundary Commission, by whom the records were furnished.

Discharge measurements of Rio Grande below Presidio, Tex.,for the period Sept. 3, 1919,

to Mar. 31, 1920.

(Made by engineers of the United States section of the International Boundary Commission.]

Date.

1919. 

Sept. 3........

6........

9........

12........

15........

Oct. 4........

7. .......

10........

13........

16........

19........

22........

25........

28........

31........

Nov. 3........

6........

9........

12........

Gage 

height.

Feet. 

23.0

15.0

14.5

14.4

16.1

17.8

17.5

17.7

16.3

14.5

14.7

14.1

14.0

13.4

15.1

13.4

13.2

12.9

12 7

Discharge.

See.-ft. 

53,638

15,566.

10,592

9,877

18, 182

91 <H3

21,837

21,429

17,568

15,025

14,063

12,916

11,881

9,734

15,575

10,045

8,725

6,480

5,103

Date.

1919. 

Nov. 15........

18........

21........

24........

27........

30........

Dec. 19........

22........

26........

28........

31........

1920.

7.. ......

10........

13........

16........

Feb. 4........

&,

Feet.

19 ft

12.6

12.5

19 ft

19 A

12 4

12.1

12.1

19 1

19 A

12 0

12.0

11 9

12.0

12.0

12.6

12.8

Discharge.

Sec.-ft. 

4,699

e; 19A

4 795

4 487

3,979

S Qfifi

2,157

1 Q^9

1,782

1,551

1,582

1,530

1 451

1*615

1 ^fi4

3,242

3,274

Date.

1920. 

Feb. 7........

10........

13........

16........

1Q

99

25........

29........

Mar. 4........

7........

10........

16........

10

22........

25........

28........ o-i

Gage

Feet. 

12.7

12.6

12.4

12.4

12.3

12.3

12.3

19 9

12.1

12.1

19 A

U Q

11.95

12.0

19 1

12.0

11 7

Discharge.

Sec.-ft. 

2,769

2,514

2,427

1,949

1,880

1,713

1 504

1,335

1,404

1,053

1 154

l'l42

1,164

1,188

1,326

1,219

1,019

102723 22 WSP 508
110 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Rio Grande below Presidio, Tex., for the period Sept. 1,

1919, to Mar. 31, 1920.

Day.

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

2............................... .. ....

3...........................................

4............................................

5............................................

6............................................

7...........................................

8............................................

9............................................

10...........................................

11................................ ... .

12...........................................

13...........................................

14............................................

15............................................

16............................................

17............................................

18...........................................

19............................................

20............................................

21........................................ ..

22...........................................

23............................................

24...........................................

25............................................

26................................ . .

27...........................................

28............................................

29................................ ..........

30............................................

31............................................

Sept.

53,638

53,638

53,638

41,270

1R *9Q

15,556

14,225

10, 592

10,592

10,592

9,877

9

O77

9,827

16,701

18, 182

14,063

14.063

14,063

15,294

15,294

19,782

19,782

19,782

18,568

18,182

18,182

07 KQA.

37,594

47,891

38,627

Oct.

37,594

37,594

91 04.^1

21,943

91 QJ.Q

21,837

21,837

21,837

21.429

21', 429

21,429

18, 234

17,568

17, 568

17,568

15,025

15,025

15.025

14,063

14,063

14,063

12,916

12,916

12,916

11,881

11,881

11,881

9,734

9,734

10,645

15, 575

Nov.

12,782

10,045

10,045

10 045

8

' 7OK

8,725

8,725

6,480

6,480

6 480

5,103

5,103

5,103

4,699

4,699

4,699

5,124

5,124

5,124

4,795

4,795

4,795

4,487

4,487

4,487

3,979

3,979

3,979

3,860

3,860

Dec.

3,072

3,072

3 O79

2,554

2

RKA

2,554

2,554

2,234

2,234

2,234

2,234

2,234

2,234

2,157

2,157

2,157

2,157

2,157

2,157

2,010

1,952

1,952

1,952

1,782

1,782

1,782

1,551

1,551

1,551

1,582

1,582

Jan.

1,582

1,582

1,532

1,532

1,530

1,451

1 451

1*451

l'575

1,615

1,615

1 584

1*584

3*. 246

3,246

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

3,242

Feb.

3,274

3,274

3,274

3,274

2

7AQ

2,769

2.769

2,769

2,514

2,514

2,427

2,427

2,427

1,949

1,949

1,949

1,880

1,880

1,880

1,713

1,713

1,713

1,504

1,504

1,504

1,504

1,335

1,335

1,335

Mar.

1,335

1,402

1,402

1,404

1,053

1,053

1,053

1.154

1,154

1,154

1.142

1,142

1,142

1,142

1,142

1,164

1,164

1.164

1,164

1,188-

1,188

1,188

1,279

1,326-

1,326

1,326-

1,219

1,219

1,125-

1.019

1,019

Monthly discharge of Rio Grande below Presidio, Tex., for the period Sept. 1, 1919,

to Mar. 31, 1920.

Month.

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

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

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

Discharge in second-feet.

Maximum.

53,600 

37.600 

12,800 

3,070 

3,250 

3,270 

1,400

Minimum.

9,830 

9,730 

3,860 

1,550 

1,450 

1,340 

1,020

Mean.

23,200 

17,700 

6,030 

2,160 

2,530 

2,180 

1,190

Run-off in

acre-feet.

1,380,000- 

1,090,000 

359,000 

133, COa 

156,000 

125,00fr 

73,200

3,320,000

NOTE. Monthly discharge computed by engineers of U. S. Geol. Survey. 

RIO GRANDE AT LANGTRY, TEX.

LOCATION. At east end of canyon section, 1,800 feet east of Langtry and a few miles

above the mouth of Pecos River. 

DRAINAGE AREA. Not measured. 

RECORDS AVAILABLE. May 1, 1900, to October 15, 1914; and December 1, 1919, to

March 31, 1920. 

GAGE. Vertical staff. Relation between datum of this gage and previous gages not

known. Read by W. H. Dodd.

DISCHARGE MEASUREMENTS. Made from car and cable. 

CHANNEL AND CONTROL. Bed composed of mud, sand, gravel, and boulders; very

shifting and subject to overflow at high stages. The overflow extends 110 feet

back of the main bank.
RIO GRANDE BASIN. Ill

EXTREMES OP DISCHARGE. December 1, 1919, to March 31, 1920; Maximum discharge, 2,565 second-feet, January 21, 1920; minimum discharge, 855 second-feet 

March 16, 1920.

The highest stage on record occurred on September 14, 1919, when the stage 

was 50.5 feet (discharge not determined).

ICE. None.

DIVERSIONS. Considerable water is diverted at Elephant Butte dam and other 

points above the station for irrigation. Total amount not known. Records of 

the Board of Water Engineers for the State of Texas show that about 180,000 

acres were irrigated in Texas, in 1920 by diversions below the station, practically 

all of which are in Hidalgo and Cameron counties.

REGULATION. Flow partly regulated by storage at Elephant Butte dam, 120 miles 

above El Paso.

ACCURACY. Owing to the shifting of the channel determinations of daily discharge 

are based almost directly on frequent current-meter measurements.

COOPERATION. Station maintained by the United States section of the International 

Boundary Commission, by whom the records were furnished.

Discharge measurements of Rio Grande at Langtry, Tex., for the period Sept. 9, 1919, to

Mar. 29, 1920.

[Made by engineers of the United States section of the International Boundary Commission.]

Date.

1919.

12........

Oct. 7........

26.. .....

Dec. 1. .......

5........

11........

17........

22........

29........

3B.

Feet . 

4.5

4.4

2.0

1.4

1.2

1.00

1.0

1.0

.8

Discharge.

Sec.-ft. 

9,370

8,443

2,568

1,725

1,443

1,387

1,396

1,280

1,271

1,234

Date.

1920.

7........

13........

17........

20........

27........

Feb. 2........

6........

10........

16........

height.

Feet. 

.8

.8

.8

.9

.9

1.7

1.7

1.6

1.4

.9

Discharge.

Sec.-ft. 

1,176

1,150

1,196

1,222

1,293

2,003

1,969

1,850

1,638

1,357

* Date.

1920. 

Feb. 20........

24........

Mar. 2........

6........

13........

16........

19........

23........

29.....:..

height.

Feet. 

.8

.9

.8

.8

.6

.5

.4

.4

.4

Discharge

SecjU 

1,286

1,349

1.266

1,325

1,050

855

887

1,007

960

Daily discharge, in second-feet, of Rio Grande at Langtry, Tex., for the period Dec. 1,1919,

to Mar. 31, 1920.

Day.

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

2...............

3...............

4...............

5...............

6...............

7...............

8...............

9...............

10...............

11...............

12...............

13...............

14...............

15...............

Dec.

1,443

1,443

1,443

1,443

1,387

1,387

1,387

1,396

1,396

1,396

1,396

1,387

1,387

1 380

1^300

Jan.

1,176

1,176

1,176

1,176

1,150

1,150

1,150

1,150

1,165

1,196

1,196

1,196

1,196

1,196

1,200

Feb.

2,003

1,969

1,969

1,850

1,850

1,850

1,850

1,850

1,638

1,638

1,638

1,600

1,600

1,458

1,458

Mar.

1,266

1,266

1,300

1,325

1,300

1,325

1,325

1,325

1,260

1,260

1,150

1,055

1,055

1,055

950

Day.

16...............

17...............

18...............

19...............

20...............

21...............

22...............

23...............

24...............

25...............

26...............

27...............

28...............

29...............

30...............

31...............

Dec.

1,280

1,280

1,271

1,271

1,271

1,271

1,271

1,250

1,250

1,250

1,250

1,234

1,176

1,176

1,176

1,176

Jan.

1,222

1,222

1,256

1,292

1,297

2,565

2,003

1,969

1,850

2,565

2,565

2,003

2,003

2,003

2,003

2,003

Feb.

1,357

1,357

1,357

1,280

1,286

1,280

1,286

1,349

1,349

1,349

1,349

1,349

1,349

1,349

Mar.

855

855

887

887

887

887

965

1,007

1,007

960

960

960

960

960

960

960
112 SURFACE WATEE SUPPLY, 1919-1920, PAET VIII.

Monthly discharge of Rio Grande at Langtry, Tex.,for the period Dec. 1,1919, to Mar.

31, 1920.

Month.

January. .

Discharge in second-feet.

Maximum.

1,440 

2,560 

2,000 

1,R20

Minimum.

1.180 

1,150 

1,280 

855

Mean.

1,320

1,530 

1,550 

1,070

Run-off in

acre-feet.

81,200 

94,100 

89,200 

65,800

330,000

NOTE. Monthly discharge computed by engineers of U. S. Geol. Survey.

BIO GRANDE NEAR DEVILS RIVER, TEX.

LOCATION. Near McKees Switch, 4J miles below mouth of Devils River and town of 

Devils River and 3J miles below site of former station. Several springs but no 

tributaries of consequence enter between the two sites. 

, DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. May 1, 1900, to April 30, 1915, and December 1, 1919, to 

March 31, 1920.

GAGE. Inclined staff. Relation between datum of this gage and previous gages 

not known.

DISCHARGE MEASUREMENTS. Made from car and cable.

CHANNEL AND CONTROL^ Shifting greatly and subject to overflow for a distance of 

500 feet.

EXTREMES OF DISCHARGE. December 1, 1919, to March 31, 1920; Maximum discharge, 9,730 second-feet, December 28, 1919; minimum discharge, 2,540 secondfeet, March 21, 1920. In September, 1919, the river reached a stage of 41 feet; 

discharge not determined.

ICE. None reported.

DIVERSIONS. Considerable water diverted at Elephant Butte dam and other points 

above the station for irrigation. Total amount not known. Records of the Board 

of Water Engineers for the State of Texas show that about 180,000 acres were irrigated in Texas in 1920 by diversions below the station, practically all of which 

are in Hidalgo and Cameron counties.

REGULATION. Flow partly regulated by storage at Elephant Butte dam, 120 miles 

above El Paso.

ACCURACY. Owing to the shifting channel determinations of daily discharge are 

based almost directly on frequent current-meter measurements. Several springs 

discharge above this location that were not measured at the previous location of 

the station.

COOPERATION. Station maintained by the United States section of the International 

Boundary Commission, by whom the records were furnished.

Discharge measurements of Rio Grande near Devils River, Tex.,for the period Sept. 10,

1919, to Mar. 26, 1920.

[Made by engineers of the United States section of the International Boundary Commission.]

Date.

1919.

Dec 9

15........

19

24........

Gage 

height.

Feet. 

3.9

2.1

2.1

2 2

9 A

Discharge.

Sec.-ft. 

10,229

3,549

3,«i38

3,577

Date.

1920. 

Feb. 4........

23........

97

Gage 

height.

Feet. 

2 2

2.0

1.9

1.9

1.7

Discharge.

Sec.-ft. 

3,693

3,501

3,588

3,450

3,017

Date.

1920. 

Mar. 9........

15........

18. ......

22........

26........

Guage 

height.

Feet. 

1.75

1.60

1.6

1.5

1.6

Discharge.

Sec.-ft. 

3.077

2.710

2.693

2.546

2.686
RIO GRAFDE BASIN. 113

Daily discharge, in second-feet, of Rio Grande near Devils River, Tex.,for the period Dec.

1, 1919, to Mar. 81,

Day.

2...............

6...............

7...............

8...............

10...............

11...............

12...............

13

14...............

15...............

Dec.

3,628

3,628

3,628

3,628

3,628

3,628

3,628

3,628

3,600

3,600

3,600

3,549

3,549

3

K4Q

Jan.

3,588

3,588

3,588

3,588

3,588

3,588

3,450

3,450

3,588

3,588

3,450

3,450

3,450

3,450

3,450

Feb.

7,429

6,280

6,280

5,375

5,375

5,375

5,375

5,375

4,219

4,216

3,690

3,693

3,693

3,693

3,693

Mar.

3,165

3,165

3,165

3,017

3,017

3,017

3,017

3,077

3,077

3,077

3,077

3,077

2,710

2,710

2,710

Day.

16...............

17...............

18...............

19...............

20...............

21...............

22...............

23...............

24...............

25...............

26...............

27...............

28...............

29...............

30...............

31...............

Dec.

3,549

3,549

3,838

3,838

3,838

3,750

3,650

3,600

3,577

3,577

3,501

3,501

3,501

3,558

3,558

3,558

Jan.

3,450

3,450

3,577

3,577

3,577

3,577

3,577

3,577

3,450

3,450

3,840

4,578

9,726

8,536

7,429

7,429

Feb.

3,693

3,693

3,501

3,501

3,501

3,588

3,588

3,588

3,450

3,450

3,450

3,450

3,450

3,436

Mar.

2,710

2,710

2,603

2,693

2,693

2,540

2,546

2,546

2,546

2,546

2,686

2,68ft

2,68ft

2,68ft

2,68ft

2,68ft

Monthly discharge of Rio Grande near Devils River, Tex.,for the period Dec. 1, W19, to

Mar. 31, 1920.

Month.

Discharge in second-feet.

Maximum.

3,840 

9,730 

7,430 

3,160

Minimum.

3,500 

3,450 

3,440 

2,540

Mean.

3,610 

4,180 

4,240 

2,820

Run-ofl in 

aere-leet.

222,000 

257,000 

244,000 

173,000

896,000

NoTE.^Monthly discharge computed by engineers of U. S. Geol. Survey. 

FECOS RIVER NEAR DAYTON, N. MEX.

LOCATION. In sec. 13, T. 18 S., R. 26 E., 3 miles east of Dayton, Eddy County, half a 

mile above mouth of Penasco River.

DRAINAGE ABBA. Not measured.

RECORDS AVAILABLE. March 24, 1905, to September 30, 1920.

GAGE. Stevens water-stage recorder on right bank; installed August 27, 1914, at 

same site and datum as staff gage installed September 7, 1905. Original gage 

which was 100 feet below the mouth of Penasco River, and half a mile below 

present gage was washed out September 6, 1905.

DISCHARGE MEASUREMENTS. Made from cable.

CHANNEL AND CONTROL. Bed composed of sand and gravel. Shifts, especially 

during high stages. Right bank consists of clay, left bank of sand; both banks 

are overflowed at stage of about 11.5 feet; no well-defined control.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 15.9 feet for 5 or 6 hours during morning of September 18 (discharge not 

determined; probably exceeded previous maximum of 50,300 second-feet on 

July 25, 1915, which was derived from discharge at Lake McMillan and included 

flow of Penasco River); minimum mean daily stage, 3.28 feet October 3 (discharge, 

65 second-feet).

Maximum mean daily gage height during year ending September 30, 1920, 10.4 

feet October 10 (discharge, 3,460 second-feet); minimum mean daily discharge, 

60 second-feet, August 10.

1905-1920: Maximum stage recorded in 1919 (see above paragraph); minimum 

stage, 2.45 feet July 26 and 27, 1916 (discharge, 23 second-feet).

ICE. None.
114 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

DIVERSIONS. Considerable water is diverted above station for irrigation; quantity 

not known, but not in conflict with rights of Carlsbad project of the United States 

Reclamation Service, which serves about 20,000 acres in the vicinity of Carlsbad 

and stores part of the water used near Carlsbad in Lake McMillan, 10 miles below

REGULATION. None.

ACCURACY. Stage-discharge relation not permanent, but periods of change are 

covered by frequent discharge measurements. Standard rating curve fairly 

well defined for all stages. Mean daily gage height determined from recorder 

graph or staff gage readings. Daily discharge ascertained by applying mean daily 

gage height to rating table or by shifting-control method, except March 22-25 and 

September 16-18, 1919, when it was determined by measurements made at Lake 

McMillan headgates and spillways. Records good.

COOPERATION. Daily-discharge record and results of current-meter measurements 

furnished by the United States Reclamation Service.

Discharge measurements of Pecos River near Dayton, N. Mex., during the years ending

Sept. SO, 1919 and 1920.

[Made by engineers of United States Reclamation Service.]

Date

1918. 

Nov. 4........

20........

tt&Bu

 «M 1919

25........

Feb. 10........

Mar. 1. .......

11........

26........

30........

July 13........

24........

29........

Gage 

height.

Feet. 

4.42

4.00

4.48

4.30

4.50

4.12

3.95

3.55

7.35

6.72

8.15

7.50

8.40

7.10

7.80

Discharge.

Sec.-ft. 

297

202

330

268

346

225

209

143

1,069

933

1,632

1,506

685

1,004

Date.

1919.

A nor 1 1

17o.......

27........

19

29

Oct. 10........

16........

25........

Nov. 6........

14........

Dec.^ 8........

1920.

19........

Feb. 18........

&,

Feet. 

8.35

5.79

5.30

5.11

5.16

6.50

10.65

7.38

5.72

5 49

5.20

5.35

5.20

5.90

5.10

Discharge.

Sec.-ft. 

1,554

233

154

1 ^1

932

3,743

1,205

457

OQA

351

389

359

617

352

Date.

1920. 

Mar. 11........

24........

Apr. 7........

29........

May 11........

31........

17........

30........

July 12........

30........

Aug. 86.......

23........

15........

23........

height.

Feet. 

4.74

4.27

4.10

4.26

7.30

7.36

9.70

6.40

7.05

7.52

4.30

4.15

5.70

5.00

4.54

4.38

Discharge.

Sec.-ft. 

270

181

157

1 W7

1,113

2,707

598

1,331

1.140

77

61

339

187

110

89

Made by engineers of U. S. Geol. Survey. * Made by R. W. Atha.
RIO GBANDE BASIN. 115

Daily discharge, in second-feet, of Pecos River near Dayton, N. Mex.,for the years ending

Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2.............

3.............

4.............

5.............

6.............

7.............

8.............

9.............

10.............

11.............

12.............

13.............

14.............

15.............

16.............

17.............

18.............

19.............

20.............

21.............

22.............

23.............

24.............

25.............

26.............

27.............

28.............

29.............

30

31.............

1919-20. 

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

2.............

3.............

4.............

5.............

6.............

7.............

8.............

o

10.............

11.............

12.............

11

14.............

15.............

16.............

17.............

18.............

19.............

20.............

21.............

22.............

23.............

24.............

25.............

26.............

27.............

28.............

29.............

30............

31.............

Oct.

74

67

65

67

67

67

67

67

84

124

100

83

75

71

69

69

69

73

88

90

665

4,420

4.420

1,530

955

650

600

750

182

570

455

775

900

650

640

575

491

491

500

1,470

3,460

2,106

1,773

1,350

1,093

1,087

i 114

1,059

890

790

725

675

625

600

590

550

510

491

477

464

491

491

Nov.

311

310

308

302

284

272

260

240

236

224

224

216

212

212

214

252

288

264

230

202

205

207 194'

188

190

200

240

242

244

303

491

477

455

432

446

419

432

432

378

390

333

333

333

333 i4n

14fl

363

17f<

370

370

370

390

410

402

390

370

419

ion

402

410

Dec.

372

347

325

324

350

350

338

330

318

312

312

302

298

298

290

290

280

272

278

290

327

358

358

348

330

316

300

272

252

252

252

170

340

370

459

455

410

390

390

370

333

340

333

326

306

293

378

370

333

299

410

Kf\f\

455

419

410

432

411

402 070

370

340

351

Jan.

263

287

336

402

450

446

407

373

344

317

287

267

276

298

385

432

459

473

501

544

597

520

455

415

377

344

317

294

291

276

276

381

328

328

343

353

404

468

560

563

451

375

384

404

413

4fii

4QR

560

587

600

489

475

475

41*

OQQ

398

<*QR

OQQ

392

OQA

390

390

Feb.

269

265

276

276

269

263

253

245

245

241

245

234

228

228

217

217

223

219

219

219

219

219

219

219

223

226

221

209

qoft

<*Q5

401

401 ion

41 0

410

435

41 0

410

4ni

413

4A4

375

OKQ

QCQ

348

14R

335

091

O/VT

316

314

OftQ

296

9Q1

ooe

009

270

Mar.

209

203

198

198

189

192

176

157

153

150

147

143

147

143

135

136

136

133

129

123

144

4,100

21,600

26,000

10,000

2,242

1,470

650

333

239

227

263

263

253

248

265

289

293

289

9Q1

285

270

240

234

224

917

208

201

201

201

192

1QO

l&d.

Ifi9

182

177

176

168

IfiQ

171

IfiQ

171

Apr.

410

675

850

1.120

700

550

333

248

239

333

333

239

175

137

198

248

230

222

214

198

160

160

267

675

1,410

2,106

3,940

2,548

1,576

166

167

160

110

110

158

157

153 111

I4fi

11O

142

142

142

142

142

142

11Q

11Q

1OQ

-IOQ

142

1R4

187

203

OQQ

222

onq

203

May.

1,290

1,136

800

600

464

437

570

760

900

1,175

1,664

1,290

875

725

600

525

491

525

433

355

423

565

625

725

1,272

9 44fi

1,772

1,506

1,374

1,290

1,230

200

195

195

1R4

165

159

162

165

316

710

840

710

760

812

S7Q

735

CO7

521

451

Q7K

375

1 485

M12

1,050

1,380

1,415

1,310

1,175

1,050

1,000

June.

1,142

1,032

1,010

,911

825

700

560

432

340

306

370

464

900

1,902

3,780

2,412

1,320

1,081

1,302

1,868

1,732

1,440

1,148

860

700

700

1,065

1,950

1,922

1,500

QAK

885

850

896

677

867

2,115

1,975

1,485

1,208

988

796

CQ1

533

010

010

663

620

468

420

426

420

375

QJQ

323

qiO

qio

OAO

Qft7

735

July, 

r

1,186

1,410

1,543

1,623

1,440

1,458

1,488

1,500

1,410

1,302

1,290

1,320

1,087

955

890

982

1,208

2,004

2,548

2,208

1,868

1,766

1,698

1,583

1,410

1,290

1,092

928

800

750

640

710

583

579 w\

395

312

257

238

220

229

600

926

559

392 MI

97ft

228

194

178

160

1 CO

1AA

187

152

iqq

QQ

QQ

78

76

Aug.

790

1,000

900

1,186

1,242

1,092

785

625

750

1,175

1,230

1,092

850

700

402

299

263

316

500

625

525

9QO

351

248

198

175

167

152

130

116

109

76

76

74

71

72

79

70

66

66

66

60

70

83

220

qox

qno

438

658

644

4QR

407

363 1^1

344

314

265

914

949

341

283

238

Sept.

283

212

152

103

116

116

QO

01

102

102

117

152

116

86

77

10,000

24,200

40 000

3^620

2,616

2,106

1,630

1 OQrt

1,203

1 91ft

1,260

983

775

660

635

oqO

101

176

1AA

1Q4.

198

1 ft7

1*tf)

13fi

141

114

105

105

110

119

98«R

01

7ft

70

71

DO

Ql

Ql

74

£Q

70

85

QQ
116 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Monthly discharge of Pecos River near Dayton, N. Mex.,for the years ending Sept. 30,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

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

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

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

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

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

1919-20. 

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

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

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

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

June ...................................:.................

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

Discharge in second-feet.

Maximum.

4,420 

311 

372 

597 

276 

26,000 

3,940 

2,460 

3,780 

2,550 

1,240 

40,000

40,000

3,460 

491 

500 

600 

435 

293 

233 

1,480 

2.120 

928 

658 

232

3,460

Minimum.

65 

188 

252 

263 

209 

123 

137 

355 

306 

640 

109 

77

65

464 

333 

293 

328 

270 

168 

139 

159 

312 

76 

 60 

68

60

Mean.

540 

242 

311 

378 

236 

2,260 

688 

930 

1,190 

1,380 

590 

3,140

993

906 

393 

380 

435 

359 

222 

162 

670 

753 

301 

242 

120

413

Run-off in

acre-feet.

33,200 

14,400 

19,100 

23,200 

13.100 

139,000 

40,900 

57,200 

70,800 

84,800 

36,300 

187,000

719,000

55,700 

23,400 

23,400 

28,700 

20,600 

13,600 

9,640 

41,200 

44,800 

18,500 

14,900 

7,140

300,000

NOTE. Monthly discharge computed by engineers of U. S. Geol. Survey.

Days of deficiency in charge of Pecos River near Dayton, N.

Sept. 30, 1906-1920.

., for the years ending

Discharge 

in 

secondfeet.

50

75

100.

125.

1£0.

175.

200.

250.

300.

350.

400.

450.

500.

550.

600.

650.

700.

800.

900.

1,000.

1,200.

1,400.

1,700.

2,000.

2,500.

3,000.

4,000.

6,000

8,000..

10,000

15,000

50,000

Days of deficient discharge.

I

13

20

49

64

84

115

158

188

225

242

254

267

287

304

320

337

347

351

358

358

361

362

363

364

365

.....

t^

12

40

75

84

120

148

175

208

243

262

282

307

318

328

339

347

351

358

359

361

363

364

364

364

365

......

z

§

7

54

94

136

162

173

180

189

210

244

279

299

306

314

314

314

319

322

326

334

341

343

353

358

361

363

365

365

366

o> 

e

80

119

154

171

200

225

230

263

285

318

339

342

346

347

347

347

347

350

352

352

354

356

356

356

356

356

366

357

o

19

61

106

179

216

237

248

272

320

324

331

339

344

347

349

349

353

354

355

355

356

357

358

358

360

360

361

362

363

365

30>

......

37

91

120

165

193

248

282

303

311

317

325

329

336

337

339

341

347

350

357

359

360

361

362

362

362

362

363

364

365

<N

0>

1

18

34

62

82

109

126

185

241

280

303

309

315

327

332

332

338

342

346

357

362

365

365

365

365

365

366

S 

A

0>

3

26

83

151

184

218

234

282

295

320

333

340

344

346

347

349

349

350

352

353

356

356

358

358

362

362

362

364

364

364

365

 *

A

0>

.......

37

68

105

118

172

236

258

271

276

278

288

294

297

305

312

317

326

336

344

354

357

359

362

363

363

364

OCJ. 

OUT:

364

365

10

4

o>

4

22

34

37

42

56

85

116

157

228

263

275

283

292

299

306

317

327

333

343

349

354

356

361

361

362

362

362

362

363

365

to

A

0>

28

34

37

47

76

88

106

155

222

264

284

294

301

310

317

323

331

341

346

347

356

360

363

363

365

365

365

365

366

i>

i

o>

49

69

100

129

156

178

186

221

282

317

329

338

345

349

355

356

359

360

362

362

363

393

363

363

364

365

......

00

r~

o>

9

48

124

187

220

251

269

320

331

336

342

343

345

348

350

353

353

355

357

360

360

361

363

363

364

364

365

'.'.'.'.'.'.

OS

ob

0>

13

22

34

47

56

70

120

160

191

202

213

221

228

234

242

249

282

271

279

296

315

335

343

350

353

356

359

359

359

361

365

!0>

15

31

37

55

79

100

124

145

183

231

267

290

295

308

315

320

330

340

344

352

357

361

363

365

365

366

a Daily discharge for July 26 to Aug. 2,1908, not included, 

feet are therefore subject to error.

Figures given for discharge above 90 second-
BIO GBANDE BASIN. 117 

PECOS RIVER AT CARLSBAD, N. MEX.

LOCATION. In SE. J sec. 6, T. 22 S., R. 27 E., at Green Street Bridge in Carlsbad, Eddy 

County, 300 feet downstream from Atchison, Topeka & Santa Fe Railway station, 

1,500 feet above mouth of Dark Canyon, and 2,000 feet below Hagerman dam.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. May 28, 1903, to March 31, 1908; May 13, 1914, to September 

30, 1920.

GAGE. Stevens 8-day water-stage recorder attached to downstream end of middle 

bridge pier, installed June 1, 1920. Gage used from May 28, 1903, to October, 

1904, was inclined staff gage at the present site. From October, 1904, to March 

31, 1908, vertical staff gage at the same site used, and from May 18, 1914, to June 

1,1920, gage was vertical staff, attached to upstream side of middle pier of bridge.

DISCHARGE MEASUREMENTS. Made by wading or from bridge.

CHANNEL AND CONTROL. Bed composed of gravel and rock; but considerable changes 

have taken place, owing to sand deposits. Banks of medium height; not subject 

to overflow. Position of control not known.

EXTREMES OP DISCHARGE. Maximum stage recorded during year ending September 30, 1919, 12.5 feet March 25 and September 19 (discharge, 23,600 second-feet, 

determined from poorly denned rating curve); minimum discharge, 39 secondfeet, November 24.

Maximum stage recorded during year ending September 30, 1920, 5.8 feet 

October 11 and 12 (discharge, 5,910 second-feet); minimum stage from waterstage recorder, 0.61 foot at 9 a. m. June 27 and 10 a. m. September 19 (discharge, 

70 second-feet).

1903-1908; 1914-1920: Maximum stage recorded, about 21.0 feet August 7, 

1916 (discharge, 85,700second-feet 1 ); minimum discharge, 30 second-feet September 30, 1918.

ICE. None.

DIVERSIONS. Large quantities of water are stored a few miles above station at 

Lakes McMillan and Avalon by the United States Reclamation Service for irrigating lands near Carlsbad. Water is also diverted for irrigation in valleys 

adjacent to river above Lake McMillan. Capacity of storage reservoirs in connection with the Carlsbad project, 58,500 acre-feet. Considerable water seeps into 

the river between the storage reservoirs and the gaging station, the quantity 

depending on the amount being used for irrigation between the two points.

REGULATION. Flow at this point completely controlled by storage reservoirs of the 

Carlsbad project, except during extreme floods.

ACCURACY. Stage-discharge relation not permanent. From October 1,1918, to September 30, 1919, standard rating curve fairly well denned below 12,000 second-feet, 

except for extremely low stages. Gage read once daily to half-tenths and is only 

an approximate indication of the mean daily gage height, because of rapid fluctuation in stage due to operation of storage reservoirs. From October 1, 1919, to 

September 30, 1920, standard rating curve fairly well defined for low and high 

stages but poorly defined for intermediate stages. Daily discharge, October 1, 

1919, to May 31,1920, ascertained by applying to rating table daily gage reading; 

June 1 to September 30,1920, by indirect method for shifting control, using mean 

daily gage height determined from recorder graph except on days of considerable 

range in stage, when it was determined by averaging results obtained by using 

gage heights for 2-hour periods, and except as noted in footnote to daily-discharge 

table. Records poor from October, 1919, to March 1920, account of daily gage 

reading not representing the mean for the day, because of-water being released 

from Lake Avalon during night. Discharge probably too small. Records fair 

during April and May and good for June to September. Determination of daily 

discharge not sufficiently accurate to warrant publication prior to April 1, 1920.

COOPERATION. Gage-height record furnished by United States Reclamation Service.

i Discharge at Avalon dam; reported by engineers of United States Reclamation Service.
118 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Discharge measurements of Peeos River at Carlsbad, N. Mex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1918. 

Nov. 8

1919.

Aug. 18

Sept. 19

20

21

Made by 

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

Ellsworthand Dudley..

United States Reclama-

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

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

Gage 

height.

Feet. 

1.30

1.46

.97

12.5

9.1

7.0

Discharge.

Sec.-ft. 

82.6

136

156

o23,600

12, 100

7,750

Date.

1920. 

Feb. 12

Mar. 13

May 4

28

Aug. 6

Sept. 3

29

Made by 

J.R.Yates...... .......

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

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

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

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

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

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

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

Gage 

height.

Feet. 

0.83

.78

.80

.74

.87

.82

.68

.74

Discharge.

Sec.-ft. 

107

91.8

96.9

79.8

126

113

74.5

101

a Meter broke when measurement was about half completed. Discharge in remainder of section estimated by comparison with measurements made Sept. 20 and 21.

NOTE. Velocity observations for measurements of Sept. 19, 20, and 21,1919, taken at 0.2 depth; coefficient of 1.00 used to reduce to mean velocity and is subject to error.

Daily discharge, in second-feet, of Pecos River at Carlsbad, N. Mex., for the period Apr. 1,

1919, to Sept. 30, 1920.

Day.

1.........

2.........

3.........

4.........

5.........

6.........

7.........

8.........

9.........

10.........

11.........

12.........

13.........

14.........

15.........

Apr.

124 

124 

124 

124 

124

124 

124 

138 

138 

138

124 

124 

124 

124 

112

May.

112 

112 

112 

112 

112

" 112 

112 

112 

112 

112

112 

112 

112 

124 

124

June.

112 

102 

102 

'510 

628

478 

234 

2,120 

2,320 

164

221 

494 

161 

778 

256

July.

105 

105 

105 

105

107

105 

105 

114 

110 

102

102 

107 

100 

105 

105

Aug.

114 

124 

122 

114 

112

102 

98 

96 

96 

98

98 

98 

100 

100 

100

Sept.

86 

86 

82 

86 

84

90 

86 

90 

88 

90

94 

92 

98 

96 

94

Day.

16.........

17.........

18.........

19

20.........

21.........

22.........

23.........

24.........

25.........

26.........

27.........

28.........

29.........

30.........

31.........

Apr.

112 

112 

112 

112 

124

112 

112 

112 

112 

112

112 

112 

124 

112 

112

May.

124 

112 

112 

112 

112

124 

124 

124 

124 

124

112 

112 

124 

124 

124 

124

June.

112 

329 

436 

311 

112

110 

102 

107 

105 

100

94 

96 

119 

110 

110

July.

105 

110 

138 

141 

146

119 

114 

110 

106 

102

102 

107 

112 

107 

102 

112

Aug.

102 

100 

100

98 

98

100 

94 

94 

92 

92

92 

96 

98 

96 

96 

90

Sept.

94 

96 

94 

92

98

96 

96 

96 

98 

96

96 

102 

102 

100 

100

NOTE. Gage heights partly estimated June 8-10 ,1920. Discharge interpolated July 1-3, 22-24, and Aug. 

11-14, 1920. Daily discharge Oct. 1, 1919, to March 31, 1920, not sufficiently accurate for publication.
MO GEANDE BASIN. 119

Monthly discharge of Pecos River at Carlsbad, N. Mex.,for the years ending Sept. SO,

1919 and 1920.

Month.

1918-19.

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

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

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

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

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

1919-20. 

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

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

92 

94 

129 

249 

383 

23,600 

6,250 

5,240 

5,740 

3,820 

297 

23,600

23,600

5,910 

335 

1,130 

930 

3,520

138 

124 

2,320 

146 

124 

102

5,910

Minimum.

51 

39 

52 

75 

57 

85 

79 

79 

100 

100 

136 

126

Mean.

68.3 

62.5 

90.8 

138 

188 

2,420 

1,640 

995 

886 

1,000 

201 

4,380

39 i 1,000

152 

124 

124 

124 

124

112 

112 

94 

100 

90 

82

82

1,310 

200 

244 

252 

517 

ol47 

120 

117 

368 

110 

100 

93.3

300

Bun-ofl in 

acre-feet.

4,200 

3,720 

5,580 

8,480 

10,400 

149,000 

97,600 

61,200 

52,700 

61,500 

12,400 

261,000

728,000

80,600 

11,900 

15,000 

15,500 

29,700 

9,040 

7,140 

7,190 

21,900 

6,760 

6,150 

5,550

216,000

a Partly estimated. See footnote to daily-discharge table.

FECOS RIVER NEAR MALAGA, N. HEX.

LOCATION. In sec. 18 or 19, T. 24 S., R. 29 E., 3J miles southeast of Malaga, Eddy 

County, and 4J miles below mouth of Black River.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. May 1 to September 30, 1920.

GAGE. Friez water-stage recorder, installed on right bank with staff gage attached to 

stilling well; inspected by W. F. Gerlach.

DISCHARGE MEASUREMENTS. Made from cable.

CHANNEL AND CONTROL. Bed composed of solid rock covered with sand; shifts. 

Right bank solid rock and steep. Left bank sand and high. Control is a rock 

ledge overlain with sand, 500 feet below gage. Shifts slightly.

EXTREMES OP DISCHARGE. Maximum stage during period of record from water-stage 

recorder, 8.2 feet at 3 a. m. June 9 (discharge, 2,340 second-feet, determined from 

extension of rating curve); minimum stage, 3.63 feet at 8 p. m. September 1 (discharge, 63 second-feet, determined from extension of rating curve), caused by 

storage at Public Utilities power dam.

In September, 1919, the river reached a stage of 26.4 feet (discharge not determined.)

ICE. None.

DIVERSIONS. The Carlsbad project of the United States Reclamation Service, with 

reservoirs of a capacity of 58,500 acre-feet, diverts a large part of the natural run-off 

above Carlsbad, N. Mex. During the season of irrigation, considerable water is 

returned to the stream by seepage from lands in the vicinity of Carlsbad. In addition to the water used by the Carlsbad project, some diversions are made for irrigation in the basin above the storage reservoirs of the Carlsbad project. .
120 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

REGULATION. The operation of a water-power plant of 300 horsepower capacity above 

station, just below Carlsbad, N. Mex., owned and operated by Carlsbad Electric 

Light & Power Co., does not materially regulate flow at gage. The flow is, however, 

regulated to a large extent by waters stored in the reservoirs of the Carlsbad project. 

In the season of irrigation the effect of the regulation is decreased by return seepage 

waters, but during the winter the flow depends on water released at the reservoirs.

ACCURACY. Stage-discharge relation not permanent. Rating curve used May 1 to 

July 20 well defined between 140 and 680 second-feet, and extended above; parallel curve used from July 21 to September 30. Operation of water-stage recorder 

satisfactory except as indicated in footnote to daily-discharge table. Mean daily 

gage heights determined from recorder graph by inspection, or by use of planimeter. 

Daily discharge ascertained by applying mean daily gage height to rating table, 

by shifting-control method, or for days of considerable fluctuation by applying 

gage heights for fractional parts of a day to rating table. Records good.

COOPERATION. Base data furnished by the United States Reclamation Service.

Discharge measurements of Pecos River near Malaga, N. Mex., during the year ending

Sept. SO, 1920. 

[Made by J. R. Yates.]

Date.

8..........

29.........

Gage 

height.

Feet. 

3.97

4.05-

4.21

Discharge.

Sec.-ft. 

151

160

227

Date.

26..........

July 24. ........

Gage 

height.

Feet. 

5.25

4.00

4.12

Discharge.

Sec.-ft. 

678

142

206

Date.

Sept. 4.........

18.........

Gage 

height.

Feet. 

4.08

4.08

Discharge.

Sec.-ft. 

215

214

Daily discharge, in second-feet, of Pecos River near Malaga, N. Mex., for the year ending

Sept. SO, 1920.

Day.

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

2............

4............

5............

6............

7............

8............

9............

10. ...........

11............

12............

13............

14............

15............

May.

126

126

123

130

140

151

162

169

180

173

130

105

107

216

341

June.

252

236

188

249

1,080

622

672

568

2,120

789

376

716

454

649

844

July.

188

162

140

176

184

154

136

133

143

244

216

208

188

192

180

Aug.

164

150

172

168

198

164

147

158

217

154

150

183

161

161

161

Sept.

86

186

225

190

154

164

186

179

168

168

201

209

198

213

91Q

Day.

16............

17............

18............

19............

20............

21............

22............

23............

24............

25............

26............

27............

28............

29............

30............

31............

May.

169

150

140

123

105

105

190

123

117

260

284

264

180

212

240

268

June.

521

348

709

680

424

268

260

236

216

200

154

150

192

216

212

July.

180

188

196

265

315

548

265

213

209

257

249

249

217

198

194

190

Aug.

213

293

459

309

340

357

428

321

293

273

245

229

233

229

221

168

Sept.

194

213

198

175

213

245

233

213

205

194

186

205

198

213

205

NOTE. Indirect method for shifting control used May 1-4, and Aug. 18 to Sept. 28. Discharge interpolated May 5-7. Gage height partly estimated May 4 and 8. Discharge obtained by averaging discharge 

for fractional parts of days: May 14,15, 22, June 4-10,12-16,18, 20, July 19-21, and Aug. 18 and 20

Monthly discharge of Pecos River near Malaga, N. Mex., for the year ending Sept. SO, 1920.

Month.

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

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

Discharge in second-feet.

Maximum.

341 

2,120 

548 

459 

245

Minimum.

105 

150 

133 

147 

86

Mean.

171 

487 

212 

230 

194

Run-off in 

acre-feet.

10,500 

29,000 

13,000 

14,100 

11,500

78, 100
RIO GRANDE BASIN. 121 

PECOS RIVER NEAR ANGELES, TEX.

LOCATION. In T. 26 S., R. 29 E., just below Pecos Valley Railroad bridge crossing 

Delaware Creek at its mouth, 2 miles north of New Mexico-Texas State line, 2\ 

miles southeast of Red Bluff, Eddy County, N. Mex., and 8J miles northwest of 

Angeles, Reeves County, Tex.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. May 27, 1914, to September 30,1920.

OAGE Stevens continuous water-stage recorder, at first outcropping of rock on the 

right bank about 600 feet below railroad bridge and mouth of Delaware Creek 

inspected by T. A. Ezell, R. T. Ezell, B. B. Dickson, and H. N. White.

DISCHARGE MEASUREMENTS. Made by wading or from cable half a mile downstream.

CHANNEL AND CONTROL. Bed and banks composed of sand, gravel, and rock; banks 

not subject to overflow. Control formed by a series of rapids 200 feet below gage; 

shifts.

EXTREMES or DISCHARGE. Maximum stage from water-stage recorder, during year 

ending September 30, 1919, 10.1 feet at 5 a. m. September 20 (discharge, 22,400 

second-feet); minimum stage, 0.30 foot at 8 p. m. February 27 (discharge, 80 

second-feet).

Maximum stage from water-stage recorder during year ending September 30, 

1920, 4.47 feet at 3.30 a. m. October 13 (discharge, 5,490 second-feet); minimum 

stage not determined as it occurred during period when recorder was not working 

properly.

1914-1920: Maximum stage 21.5 feet at 10 a. m. August 8, 1916, measured by 

leveling from flood marks (discharge not determined); minimum discharge, 

February 27, 1919 (see above).

ICE. Stage-discharge relation not seriously affected by ice; open channel rating 

assumed applicable.

DIVERSIONS. The Carlsbad project of the United States Reclamation Service, with 

reservoirs of a capacity of 58,500 acre-feet, diverts a large part of the natural runoff above Carlsbad, N. Mex. During the season of irrigation, considerable water 

is returned to the stream by seepage from lands in the vicinity of Carlsbad. 

In addition to the water used by the Carlsbad project, some diversions are made 

for irrigation in the basin above the storage reservoir of the Carlsbad project.

REGULATION. The operation of a water-power plant of 300 horsepower capacity 

above station, just below Carlsbad, N. Mex., owned and operated by Carlsbad 

Electric Light & Power Co., does not materially regulate flow at gage. The flow is, 

however, regulated to a large extent by water stored in the reservoirs of the Carlsbad project. In the season of irrigation the effect of the regulation is decreased 

by return seepage water, but during the winter the flow depends on water released 

at the reservoirs.

ACCURACY. Stage-discharge relation assumed to have changed during flood beginning 

March 23, 1919, and changed slightly in 1920. Rating curves well defined for all 

stages. Operation of water-stage recorder not satisfactory considerable of the 

time owing principally to silt in float well, as indicated in footnote to daily-discharge table. From October 1, 1918, to September 30, 1919, daily discharge ascertained by applying to rating table mean daily gage heights determined from 

gage-height graph by inspection, or by planimeter; and from October 1, 1919, to 

September 30, 1920, by discharge integrator, except as noted in footnote to dailydischarge table. Records good, except when recorder was not operating properly
122 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Discharge measurements ofPecos River near Angeles, Tex., during the years ending Sept.

30, 1919 and 1920.

Date.

1918. 

Nov. 7

1919.

Jan. 14

Mar. 20

Aug. 16

19

Sept. 18

19

19

20

20

Made by 

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

R. J. Hank.............

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

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

C. E. Ellsworth........

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

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

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

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

Gage 

height.

Feet. 

0.47

.55

.58

1.20

C9

.50

3.85

6.48

7 9ft

9.28

9 02

Discharge.

Sce.-ft.

1Q9

1QQ

74 *\

OQ1

232

4,110

alO,200

012,800

°19 600

al8,W

Date.

1919. 

Sept. 20

21

Nov. 27

1920. Feb 24

Mar. 18

Apr. 15 Marr ID

July 24

Slant 94

Made by 

C. E. Ellsworth........

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

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

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

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

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

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

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

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

Gage 

height.

Feet. 

8.66

6.25

.40

.46

.40

.30

.25

.38

.39

.36

Discharge.

Sec.-ft. 

016,700

9,560

214

244

220

157

153

215

216

200

a Surface velocity observed and coefficient of 0.85 used to reduce to mean velocity.

Daily discharge, in second-feet, of Pecos River near Angeles, Tex., for the years ending

Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2.............

3.............

4.............

5.............

6.............

7.............

8.............

9.............

10.............

11.............

12.............

13.............

14.............

15.............

16.............

17.............

18.............

19.............

20.............

21.............

22.............

23.............

24.............

25.............

26.............

27.............

28.............

29.............

30.............

31.............

Oct.

147

135

126

135

135

135

147

135

156

156

147

143

147

143

143

156

151

139

ill

151

167

173

1Q4

178

162

162

167

151

135

143

143

Nov.

151

147

151

143

139

135

139

147

151

151

173

167

167

167

156

162

162

162

151

156

162

162

189

231

183

183

147

315

Dec.

225

218

225

200

173

131

135 13*;

110

118

126

1 f^fi

167

173

178

183

178

183

218

231

257

270

97fi

264

264

257

257

231

173

Til

151

Jan.

147

147

143 i*fi

111

147

147

151

151

143

Til

162

178

189

183

167

178

1Q4

205

212

Oqi

251

264

97ft

497

AQQ

386

OKI

218

919

225

Feb.

244

257

9W

251

264

97fl

285

9QC

qnn

308

285

QOQ

285

919

293

1Q4

1SJ3

173

162

151

143

toe

126

110

104

101

110

Mar.

110

114

1QO

162

183

ISO

104

99 K

205

189

200

200

183

126

114

131

1 C«

104

90-1

200

1,160

6,160

19 ^ftfi

21,000

iq qftft

6,200

3,400

2,020

1,660

1.550

Apr.

1,530

2,780

3670

1,960

l|610

1.510

930

880

1,100

2,660

1,470

2 360

1 700

476

1,330

764

330

330

qqfl

330

330

330

007

343

330

1,910

3 870

3,270

4,330

May.

2,080

2,060

1,710

1,910

1,190

632

476

363

330

990

1,270

802

1,470

3,750

1,090

1,420

940

2,570

1,210

562

396

363

I Qfift

2,150

650

562

1,190

3 770

990

840

840

June.

990

1,550

oon

1,280

1,300

1,420

2,730

4,280

1,530

2 74n

1,580

2

Aen

1,300

2,670

1,900

July.

| 900

562

2,640

745

314

436

q q7fl

2,490

1,390

1,040

304

294

641

299

632

314

1,090

502

3,500

4,060

3.020

1,630

493

1,430

1,310

1,190

1.160

1,280

son

890

Aug.

314

245

262

245

910

396

1,220

1,400

1.370

597

698

320

356

309

274

270

320

245

249

299

245

241

237

241

270

270

258

258

258

253

245

Sept.

258

258

266

262

245

245

249

294

309

274

253

258

258

245

270

3,420

12,100

4,820

10,900

15,500

10,100

6,530

4,560

4,880

4,530

2,880

707

900

970

1,060
BIO GEA2STDE BASIN. 123

',, ^n second-feet, of Pecos River near Angeles, Tex., for the years ending 

Sept. 30,1919 and 1920 Continued.

Day.

1919-20. 

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

2.............

3.............

4.............

5.............

6.............

7..... ........

8.............

9.............

10.............

11.............

12.............

13.............

14.............

15.............

16.............

17.............

18.............

19.............

20.............

21.............

22.............

23.............

24.............

25.............

26.............

27.............

28.............

29.............

30.............

31.............

Oct.

1,380

524

290

267

761

978

1.400

585

335

805

1,050

4 ion

4,540

2,410

1,400

1,040

1,430

1,140

354

1,030

342

1,090

322

713

1,070

317

1,100

321

254

1,610

Nov.

1,340

338

244

229

275

312

314

723

300

240

220

254

295

277

364

535

322

390

318

369

345

984

260

258

228

224

441

Dec.

435

370

360

370

369

357

270

227

242

278

320

304

351

356

352

358

358

362

366

363

360

348

348

OAQ

288

247

1,040

334

238

211

236

Jan.

1,100

614

350

333

967

292

223

225

220

220

514

864

372

1,280

787

327

319

317

313

765

848

1,000

378

1,210

1 '420 040

318

892

401

588

Feb.

352

664

390

1,280

399

1,300

388

297

911

359

539

Q81

867

588

322

226

586

278

184

630

315

215

7*Ul

901

588

OVA

OQft

KTC

9ftd

Mar.

223

194

628

302

421

310

224

450

350

548

335

229

415

319

211

194

566

231

395

333

229

213

204

181

180

178

177

176

174

Apr.

173

172

174

175

177

178

180

182

183

185

186

188

198

193

177

177

179

184

195

214

193

209

104

191

200

200

205

188

186

May.

181

172

180

184

190

195

194

216

225

225

207

195

190

214

317

309

218

188

I 200

June.

410

2.310

1,600

494

550

852

535

1,030

601

311

413

623

536

280

234

228

217

200

198

207

233

686

300

July.

250

223

252

258

238

242

239

230

232

Aug.

221

215

210

215

218

222

212

197

211

222

197 220

205

200

195

219

278

314

403

274

365

340

369

303

282

267

245

240

236

237

240

Sept.

207

173

220

255

246

Ml 

234

234

255

249

272

265

215

217

215

212

225

221

219

215

218

263

286

240

205

193

196

196

646

400

300

NOTE. On account of unsatisfactory operation of the recorder, mean daily gage heights were estimated 

Dec. 13-15,1918; and Jan. 12-13, Feb. 17-26, Apr. 14, May 4-13,15,19-31, June 1-4, July 12-19,24-31, Aug. 1, 

and 12-16,1919. Discharge estimated or interpolated: June 6-12, June 22-30, and July 1-2.1919; Mar.26-31, 

Apr. 1, 3-11, May 19 to June 8, July 1-23, Sept. 10, 11. 29, and 30, 1920, by comparison with records 

on Pecos River at Malaga, N. Mex., and from incomplete gage graph. Braced figures show estimated 

mean discharge for period included.

Monthly discharge of Pecos River near Angeles, Tex., for the years ending Sept. 30, 1919

and 1920.

Month.

1918-19. 

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

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

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

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

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

194 

315 

270 

489 

308 

21,000 

4,330 

3,770

4,060 

1,400 

15,500

21,000

Minimum.

126 

135 

110 

143 

101 

110 

325 

330 

990 

294 

237 

245

101

Mean.

150 

166 

194 

211 

209 

2.340 

1,450 

1,310 

1,770 

1,280 

422 

2,930

1,040

Run-off in 

acre-feet.

9,220 

9,880 

11,900 

13,000 

11,600 

144,000 

86,300 

80,600 

105,000 

78,700 

25,900 

174,000

750,000
124 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Monthly discharge of Pecos River near Angeles, Tex.,for the years ending Sept. SO, 1919

and 1920 Continued.

Mouth.

1919-20. 

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

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

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

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

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

4,540 

1.340 

1,040 

1,280 

1,300 

628 

214

9 Qin

403 

646

4,540

MiT> iTmlTn

254 

220 

211 

220 

184 

174 

172

195 

173

Mean.

1,100 

351 

347 

577 

522 

291 

188 

206 

531 

247 

251 

250

405

Run-off in 

acre-feet.

67,600 

20,900 

21,300 

35,500 

30,000 

17,900 

11,200 

12,700 

31,600 

15,200 

15,400 

14,900

294,000

PECOS RIVER ABOVE BARSTOW, TEX.

LOCATION. Three-quarters of a mile below headgate of Biggs irrigation project, 

1 mile east of Patrole siding on Pecos Valley Railway, 1J miles above headgate 

of Barstow Irrigation Co., 14 miles northwest of Barstow, Reeves County, and 

10 miles northwest of Pecos.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. February 1, 1916, to September 30, 1920.

GAGE. Stevens water-stage recorder on right bank, inspected by W. G. Paddock and 

C. E. Armstrong.

DISCHARGE MEASUREMENTS. Made by wading or from cable 150 feet below gage.

CHANNEL AND CONTROL. Channel straight 100 feet above and 300 feet below station. 

Bed composed of gravel, clay, and sand; not permanent. Right bank is clay, 

clean, and fairly permanent; left bank loose and covered with salt cedar; banks 

are overflowed at gage height about 10 feet. Shoal 250 feet below gage serves as 

control; shifts during high water.

EXTREMES OF DISCHARGE. Maximum stage during year ending September 30, 1919, 

occurred during the period, September 20-23, for which no reliable record is 

available. Flood marks indicate a maximum of about 12 feet. Minimum stage 

from water-stage recorder 1.20 feet October 2 (discharge, 63 second-feet).

Maximum stage from water-stage recorder during year ending September 30, 

1920, 10.65 feet at 10 p. m. October 14 (discharge, 4,000 second-feet); minimum 

stage occurred during period of missing record.

1915-1920: Maximum stage from water-stage recorder 12.1 feet at 6 a. m. 

August 10, 1916 (discharge not measurable above a stage of about 11 feet because 

of water overflowing banks); minimum discharge 22 second-feet, June 24, 1917.

ICE. None reported.

DIVERSIONS. In addition to water used in New Mexico by the Carlsbad and other 

projects, several large diversions are made above the station in Texas. The 

principal projects in Texas which divert above the station are the Arno, Porterville, Farmers Independent, and Biggs. According to the records of the Board 

of Water Engineers for the State of Texas, these projects have declared a total of 

about 7,500 acres irrigated. The principal projects below the station are the 

Barstow, Grandfalls, Imperial, and Zimmerman which have declared a total 

irrigated area of about 303 000 acres.
EJO GBANDE BASIN. 125

KE&ULATION. Storage in connection with the Carlsbad project controls the run-off 

during parts of the year. The operation of a water-power plant of 300 horsepower 

capacity, below Carlsbad, does not affect the flow at this point.

ACCURACY. Stage-discharge relation not permanent. Standard rating curve well 

defined below 500 second-feet, and fairly well defined to 4,000 second-feet. Operation of water-stage recorder not satisfactory, principally because of silt in float well, 

and insufficient attendance. Mean daily gage heights determined by inspecting 

recorder graph, or by planimeter. Daily discharge, October 1,1918, to September 

27, 1919, ascertained by applying mean daily gage height to rating table and from 

September 28,1919, to September 30,1920, by indirect method for shifting control 

except as otherwise indicated in footnote to daily-discharge table. Records 

April 1 to September 30, 1919, poor; fair for other periods.

Discharge measurements of Pecos River above Barstow, Tex., during the years ending

Sept. 30, 1919 and 1920.

 Date.

1918. 

Nov. 9

1919.

Tan 19

Mar. 20

on

20

Nov. 26

Made by 

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

R. J. Hank.... .........

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

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

C. E. Ellsworth........

Gage 

height.

Fed. 

1 49

2.08

1.90

8.48

6.10

3.05

2

00

2.71

Discharge.

Sec.-ft. 

85.4

136

119

2,500

1.400

271

170

275

Date.

1920.

Feb. 23

Mar. 17

May 18

July 22

Sept. 22

Made by 

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

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

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

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

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

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

Gage 

height.

Feit. 

2.80

3.05

2.16

1.21

1.84

2.56

.87

1.07

Discharge.

Sec.-ft. 

277

293

178

89.2

166

267

72.6

94.9

Daily discharge, in second-feet, of Pecos River above Barstow, Tex., for the years ending

Sept. SO, 1919 and 1920.

Day.

1918-19.

2..............

3..............

4... ...........

5..............

6..............

7. .............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29.............. 

30..............

31..............

Oct.

64

63

66

74

71

69

70

71

74

',

Nov.

89

82

82

84

90

100

108

122

120

114

108

94

90

80

Dec.

176

 tfiA

146

Jan.

138

129

128

136

140

141

138

136

127

139

138

150

156

163

.......

Feb.

ies

Mar.

121

1AQ

1,400

S

oon

4,560

4 ^50

4^090

3,440 

2 640

l!620

Apr.

1,570

2,470

3,520

1,450

589

1,420

924

520 i ndn

2.500

1,840

2,680

1,790

203

193

1QO

inn

190

1QQ

1 OQA

3.250 

3,120

May.

3,450

2,350

2,380

2,170

1,740

1,400

1,380

765

1,330

3,140

1,430

1,580

1 040

2

AQO

1,600

1,730

1,480

1 9^?fl

3,080 

1 280 i!ooo

June.

1,730

1,280

1,230

1,630

2 onn

3,440

2,000

2

70A

2

nKA

9 ft4H

I 7QA

2,720

1,430

1 940

1 7 Q4ft

1,480

1,430

sfifi

July. Aug.

265

251

OQQ

94 Q

189

167

164

1 *V7

151

148

147

140

129

124 

no

114

Sept.

114

112

114

114

129

131

120

117

116

146

151

124

19Q

124

124

443

3,020

4 ion

4 inn

4,269

4,120

4 000

1,320 

1,320

102723 22 WSP 508 9
126 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Daily discharge, in second-feet, of Pecos River above Barstow, Tex., for the years ending 

Sept. 30, 1919 and 1920 Continued.

Day.

1919-20. 

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

2.......... ..

3..............

4..............

5..............

6... ......

7

8..............

9..............

10..............

11.. ....... .

12..............

13..............

14..:...........

15..............

16..............

17..............

18.......... ...

19..............

20..............

21..........

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

1,370

2,200

1,420

723

514

793

1,170

1,620

872

559

832

1,170

3,550

3,670

3,070

1,820

1,570

1,670

1,520

723

1,320

1,370

1, 130

574

1,130

872

1, 220

589

1,130

688

7OT

Nov.

1.570

1,370

574

410

345

335

366

377

670

433

514

388

410

356

377

339

291

291

310

974.

Dec.

310

462

426

403

403

403

392

339

310

300

329

350

370

370

360

350

350

339

QQQ

291

 JOQ

Jan.

291

291

291

 JOQ

900

1,110

880

1,040

980

1,020

Feb.

.......

282

565

414

426

Mar.

414

392

185

257

370

236

222

339

193

Apr.

93

May.

98

335

164

117

June.

282

310

July.

82

156

111

136

122

Aug.

117

117

110

103

101

110

116

110

101

107

163

265

173

120

124

137

155

221

252

284

215

265

260

279

230

228

193

175

167

167

Sept.

166

166

98

95

98

91

89

87

87

NOTE. No gage-height record for days for which discharge is not given. Discharge partly estimated 

on following dates. Oct. 17-23, Nov. 6, 22-24, 26, 1919; Jan. 9, 22, 23, 25, Feb. 23-27, Mar. 1, 5, 17, May 16 

July 22, July 30 to Aug. 19, and Sept. 22, 1920. Discharge from staff gage reading on following dates: 

Dec. 18, 1918, Feb. 20, June 30, 1919, Nov. 25, Apr. 14, and June 22, 1920.

Monthly discharge of Pecos River above Barstow, Tex., for the year ending Sept. 30, 1920.

Month.

Dischars;e in second-feet.

Maximum.

3,670 

284

Minimum.

514 

101

Mean.

1,340 

170

Run-off in 

acre-ieet.

82,400 

10,500

NOTE. Records too fragmentary to permit computation of discharge for other months. 

PECOS RIVER NEAR GRANDFALLS, TEX.

LOCATION. At site of old highway bridge where Grandfalls-Fort Stockton road 

formerly crossed Pecos River, 1J miles upstream from present Grandfalls-Fort 

Stockton road crossing at Iron Bridge, 2 miles below diversion dam for silt-line 

canal of Imperial Irrigation Co., 3 miles south of Grandfalls, Ward County, 4J miles 

above diversion dam of Zimmerman project, and 21 miles south of Monahans.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. November 6, 1915, to September 30, 1920. Records were 

taken at Iron Bridge, 1J miles downstream, from November 6,1915, to August 3, 

1917. Discharge at both points believed to be the same.
BIO GRANDE BASIX. 127

GAGE. Stevens water-stage recorder, installed August 9, 1917, on downstream side 

of old bridge pier near left water's edge; inspected by A. J. Adcock. Prior to 

August 3, 1917, a Stevens water-stage recorder at Iron Bridge. Backwater from 

Zimmerman dam compelled the relocation of the station.

DISCHARGE MEASUREMENTS. Made by wading near gage, from cable 50 feet above 

gage, or during extremely high stages, at Iron Bridge.

CHANNEL AND CONTROL. Bed of stream clean, smooth, solid rock, and permanent, 

except small deposits of sand and gravel. Channel straight for 100 feet above and 

below station. One channel below gage height of 8 feet; above this stage, both 

banks, which are dirt and wooded, subject to overflow. Rock ledge extending 

diagonally across stream just below gage serves as low-water control.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, from water-stage recorder 9.6 feet from 2 to 6 a. m. September 25 (discharge, 13,000 second-feet); minimum discharge, approximately 3 second-feet from 

March 16-21.

Maximum stage from water-stage recorder during year ending September 30, 

1920, 5.7 feet October 16 (discharge, 2,580 second-feet). Minimum stage during 

year from water-stage recorder, 0.52 foot from 1 to 6 p. m. July 23 discharge, 13 

second-feet). A lower stage may have been reached during periods of missing 

records.

1915-1920: Maximum stage in 1919 (see above); minimum discharge less than 

0.7 second-foot April 17, 1916.

ICE. None. ,

DIVERSIONS. Station is 2 miles below diversion of silt-line canal of the Imperial Irrigation Co., 15£ miles below diversion for Grandfalls project, 18J miles below diversion for the Imperial reservoir (17,000 acre-feet capacity), and 4J miles above 

diversion for Zimmerman project. Available data show that tracts aggregating 

approximately 143,000 acres are irrigable between station and lower limits of 

Carlsbad project of United States Reclamation Service. Records of Board of 

Water Engineers for the State of Texas show that about 58,000 acres are declared 

irrigated in Texas above station. The effect of diversions is somewhat counterbalanced by water returned to stream by seepage. The only diversion of importance below the'station is that for the Zimmerman project which has declared 

an irrigated area of 2,005 acres.

REGULATION. Slight effect caused by operation of storage reservoirs on Carlsbad 

project.

ACCURACY. Stage-discharge relation appears to be practically permanent for high 

stages, but measurements indicate that the low-stage control shifts considerably. 

Standard rating curve well denned for all stages. Operation of water-stage 

recorder unsatisfactory. Mean daily gage heights obtained by inspecting gageheight graph, or for days of considerable fluctuation by use of planimeter. Daily 

discharge ascertained by applying mean daily gage height to rating table, March 

19 to September 30, 1919, and January 1 to February 8, 1920; by shifting-control 

method the remainder of period except as indicated in footnote to daily-discharge 

table. Records excellent when water-stage recorder was operating satisfactorily 

and poor for other periods.
128 SURFACE WATER SUPPLY, 191&-1920, PART VIII.

Discharge measurements ofPecos River near Grand/alls, Tex., during the years ending Sept.

SO, 1919 and 1920.

Date.

1918. 

Nov. 5

1919. 

Jan. 11

Mar. 19

29

30

31

Aug. 14

21

Sept. 24

25

Made by 

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

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

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

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

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

C. B.Ellsworth......

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

height.

Feet, 

0.65

.48

OQ

9 30

8.20

6.55

2 84

1.58

97

8.55

9.60

Discharge.

Sec.-ft. 

11.5

9

0

3

n

ft 1O AAA

66,390

r Q 97fi

Q^d

253

75

<*7,110

<m, 800

Date.

1919.

Oct. 6

Nov. 24 

1920.

Feb. 21

Apr. 13

May 17

July 21

Sept. 21

Made byDudley and Adcock . .

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

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

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

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

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

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

&,

Feet. 

2.33

2.20

2.30

1.61

1.32

.60

.69

.69

.62

.97

Discharge.

See.-ft.

687

541

627

279

178

16.4

31.2

34.1

24.0

80.8

« Surface velocity observed; coefficient of 0.87 used to reduce to mean velocity. 

& Surface velocity observed; coefficient of 0.85 u=ed to reduce to mean velocity. 

« Surface velocity observed; coefficient of 0.88 usad to reiuce to mean velocity. 

<* Surface velocity observed; coefficient of 1.05 used to reduce to mean velocity.

Daily discharge, in second-feet, of Pecos River near Grand/alls, Tex., for the years

Sept. SO, 1919 and 1920.

Day.

1918-19. 

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

2. .............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22. .............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

14

13

14

14

13

13

13

13

15

16

18

22

18

19

17

16

16

16

17

19

16

16

16

16

15

16

15

17

17

16

15

Nov.

13

12

12

12

12

14

12

9

8

10

10

9

9

9

9

10

10

10

10

10

11

12

12

12

13

14

14

15

15

15

Dec.

16

16

16

16

17

18

19

19

19

15

11

8

6

6

6

6

6

6

6

7

7

7

7

8

8

8

9

9

9

9

9

Jan.

9

9

9

9

9

9

9

9

9

9

10

10

10

10

10

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

Feb.

30

1

85

82

79

76

72

69

66

65

64

62

60

58

56

54

52

50

45

40

Qfi

31

Mar.

22

18

13

9

4

4

4

4

4

4

4

4

4

4

4

3

3

3

3

3

3

4

20

365

1,660

2,000

2,630

3,790

10,500

6,740

3.080

Apr.

1,500

1,320

1,010

1,490

2,180

2.170

960

1,140

933

894

1,010

1,550

1,470

1,710

1,680

757

900

818

415

280

254

242

227

202

187

187

187

175

669

1,540

May.

1,790

1,980

1,930

1,580

1,330

1,380

1,190

680

524

368

212

265

365

360

559

1,060

1,200

1,080

916

735

480

295

265

305

305

310

800

June.

570

ij OUU

1,010

il,000

928

559

691

790

1,020

1,050

1,900

1,800

1,620

1,630

1,710

1,380

1,630

1,500

365

July.

224

576

1,330

1,060

718

1.470

812

400

405

1,720

1,610

1,180

894

520

325

350

440

265

345

375

702

1,610

1,820

1,870

1,340

850

Aug.

[ 450

221

151

104

175

257

410

796

834

365

365

AOU

76

80

Sept.

78

 J., Uvv

2,140

2,350

2,750

3,.390

3,920

6,980

12,300

8,250

5,360

4,420

3,230

1,550
RIO GBANDB BASIN. 129

Daily discharge, in second-feet, of Pecos River near Grandfalls, Tex.,for the years ending 

Sept. SO, 1919 and 1920 Continued.

Day.

1919-20. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14....... ......

15..............

16..............

17..............

18..............

19..............

20..............

21..............

22..............

23..............

24..............

25..............

26..............

27..............

28..............

29..............

30..............

31..............

Oct.

1.450

1,480

1.770

1,480

906

664

1,040

2,580

2,280

1,580

1,490

1,320

928

1,100

856

1,100

Sfi7

1,070

980

1,400

1,060

1,200

Nov.

988

1,540

1,510

988

751

614

543

537

548

691

686

520

430

380

oon

380

390

410

570

17 e

eo 7

576

614

610

548

470

JCK

AKJ[\

Dec.

.

Ane

470

465

460

4ce

455

450

4cc

4.3*

641

625

4ft e

Jan.

390

335

KCO

834

598

515

834

658

490

420

455

475

460

856

762

982

1,060

fiQfi

542

490

47K

*U9

933

960

686

906

716

790

716

537

592

Feb.

669

500

576

598

801

691

971

O7R

280

450

235 2"iO

320

187

246

166

Mar.

125

175

1 ^7

117

112

227

160

172

184

142

181

202

270

218

166

181

175

Q1

56

139

106

68

86

96

19

22

18

16

16

16

13

Apr.

13

14

15

15

16

16

18

17

18

18

17

16

16

28

70

70

66

58

60

58

58

60

58

58

56

5S

43

25

19

19

May.

19

18

18

18

19

19

18

17

18

19

20

18

16

16

25

25

32

37

39

43

41

50

58

52

<M

41

50

39

37

43

52

June.

52

45

4<i

52

56

68

83

145

184

181

v\

106

122

125

ill

136

139

148

157

163

July.

169

178

187

190

193

193

196

199

193

193

193

20

23

50

 15

18

18

Aug.

18

18

17

17

Sept.

136

93

78

63

63

60

58

169

NOTE. Discharge interpolated: Jan. 17-21, 23-30, Feb. 9-14, 16-23, 25-28, Mar. 1-4, 6-10, 12-18, May 9 

and 10,1919. Discharge estimated: Feb. 1-7, May 27-30, June 2-6, 8-10, 24-29, July 26-31, Aug. 1-3,14-20, 

22-31, Sept. 1-16,17 and 18,1919; estimated discharge obtained by comparison with records of flow at other 

stations and are probably fairly accurate. Gage-height record estimated wholly, or in part, for following 

periods: Nov. 18 to Dec. 28,1918; May 23-26,1919, and July 8-11,1920. Discharge for following days determined from readings of staff gage: Jan. 22, 31. Feb. 8, 15, 24, Mar. 5, 11. June 1, 7, Aug. 21,1919; Sept. 1, 

11, and 21,1920. Braced figures show mean discharge for periods included.

Monthly discharge of Pecos River near Grandfalls, Tex., for the years ending Sept. SO,

1919 and 1920.

Month.

1918-19. 

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

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

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

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

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

1919-20.

December 1 ...............................................

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

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

Discharge in second-feet.

Maximum.

22 

15 

19 

10

10,500 

2,180

1,870 

834 

12,300

12,300

1,540 

641 

1,060 

270 

70 

58

Minimum.

13 

8.0 

6.0 

9.0

3.0 

175 

212 

365 

224

3.0

380 

405 

335 

13 

13 

16

Mean.

15.8 

11.4 

10.6 

9.16 

53.5 

997 

935 

821 

1,270 

886 

221 

1,990

601

621 

479 

653 

121 

35.8 

31.0

Run-off in 

acre-feet.

972 

678 

652 

563 

2,970 

61,300 

55,600 

50,500 

75,600 

54,500 

13,600 

118,000

435,000

37,000 

13,300 

40,200 

7,440 

2,130 

1,910
130 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

PECOS RIVER NEAR COMSTOCK, TEX.«

LOCATION. At Pecos High Bridge of Galveston, Harrisburg & San Antonio Railway 

Co., 11 miles west of Comstock, Valverde County, 18 miles east of Langtry, 14 

miles by stream above confluence with Kio Grande, and below all tributaries.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. May 1,1900, to September 30,1920. (Alsogage heights for 1898.)

GAGE. Vertical staff attached to downstream side of bridge pier on left bank; read 

by W. A. Clare.

DISCHARGE MEASUREMENTS. Made from cable, 1,000 feet above bridge.

CHANNEL AND CONTROL. Banks and stream bed composed of rock and gravel; 

water flows through a series of rapids and pools in a canyon approximately 300' 

feet deep; banks not subject to overflow. Stage-discharge relation at low stages 

changes slightly.

EXTREMES OF DISCHARGE. Maximum stage recorded during year ending September 

30, 1919, 30.00 feet at 10 a. m. September 16 (discharge, not determined); minimum stage, -0.02 foot October 6-9 (discharge, 126 second-feet).

Maximum stage recorded during year ending September 30, 1920, 5.8 feet at 

5 p. m. October 4 (discharge, 5,220 second-feet); minimum stage, 0.40 foot on 

several days during July and August (discharge, 288 second-feet).

1900-1920: Maximum stage recorded, 35.75 feet April 6, 1900 (discharge not 

determined); minimum discharge recorded, 106 second-feet July 29 to August 1, 

1918 (gage-height, 0.12 foot). Gage heights for low stages not comparable 

owing to shifting control.

ICE. None.

DIVERSIONS. Considerable water is diverted and stored above the station for irrigation. Lakes McMillan and Avalon of the Carlsbad project of the United States 

Reclamation Service, with a combined capacity of 58,500 acre-feet, are located on 

Pecos River a few miles above Carlsbad, N. Mex. In addition to the water stored 

in New Mexico, water from Pecos River is used to irrigate large areas of land in 

the vicinity of Barstow and Grandfalls, Tex. There are no diversions below the 

station. Return waters tend to equalize effects of diversions in lower part of 

drainage basin.

REGULATION. Flow partly controlled by storage and diversions for irrigation above 

station. No water-power plants of any consequence operated in the drainage 

basin, except a public utility plant of about 300 horsepower, near Carlsbad, N. Mex.

ACCURACY. Stage-discharge relation changed during period, October 10-24, 1918. 

Two curves used: One applicable from October 1-9, 1918, well defined for all 

stages, the other, applicable from October 25, 1918, to September 30, 1920, well 

defined from 260 to 13,000 second-feet, and fairly well defined to 40,000 secondfeet. Gage read to hundredths twice daily from October 1, 1918, to September 

30, 1919, and to half-tenths October 1, 1919, to September 30, 1920. Daily discharge ascertained by applying mean daily gage height to rating table except 

from October 10-24, 1918, when indirect method for shifting control was used. 

Records good.

Discharge measurements of Pecos River near Comstock, Tex., during the years ending

Sept. 30, 1919 and 1920.

Date.

1919.

May 10

Aug. 23 

Sept. 22

23

Made by 

W.H.Dodd. ..........

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

Ellsworth and Dudley. . 

D. A. Dudley..........

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

Gage 

height.

Feet.

2.40

1.17

17.85

7.78

Discharge.

Sec. -ft.

579 

"38,200

08,910

Date.

1920. 

May 14

14

Made by- Gage 

height.

Feet. 

.73

.66

Discharge.

Secjt. 

400

3fi3

a Surface velocity observed and coefficient of 1.02 used to reiuce to mean velocity.

8 Records published in reports prior to 1915 under heading "Pecos River near Moorehead, Tex."
RIO GRANDE BASIN. 131

JDaily dii '., in second-feet, of Pecos River near Comstock, Tex.,for the years ending 

Sept. 30, 1919 and 1920.

Day.

1918-19. 

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

2..............

3..............

4..............

5..............

6..............

7..............

8..............

9..............

10..............

11..............

12..............

13..............

14..............

15..............

16.............

17.............

18.............

19.............

20.............

21.............

22

23.............

24.............

25.............

26.............

27.............

28.............

29.............

30.............

31.............

1919-20. 

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

2.............

3.............

4.............

5.............

6.............

7.............

8.............

9.............

10.............

11.............

12.............

13.............

14.............

15.............

16.............

17.............

18.............

19.............

20.............

21.............

22.............

?3.............

2-r. ............

25.............

26.............

27.............

28.............

29.............

30.............

31.............

Oct.

130

130

130

130

130

126

126

126

126

332

570

1,400

229

194

190

192

188

190

194

202

1.550

816

776

397

310

283

288

285

283

267

262

4,660

4,940

5,220

3,330

2,980

3,210

1,670

1,590

2,180

1,830

1,670

1,590

1,910

2,180

2,560

2,980

3,090

2,560

2,270

2,180

1,910

i 7f»n

1,750

1,590

1 f»Qft

1,590

1 flQft

1,590

Nov.

257

255

250

250

238

233

238

550

262

302

262

257

257

250

250

250

250

248

250

250

250

250

250

ovt

252

262

272

267

262

283

1,590

1,590

1,590

1,910

1,750

i f»on

1,350

1,270

1,110

1,080

1 000

1,110

970

835

835

803

803

970

Q7ft

970

Q^T

970

Q7fi

Q7fl

Q7n

Dec.

262

262

262

262

260

257

257

257

262

262

257

257

262

257

257

257

257

257

257

260

257

262

260

257

257

257

257

257

257

257

257

935

835

770

803

710

710

710

835

710

< 710

1 710

710

710

710

710

710

710

710

710

710

710

710

710

710

710

710

710

710

600

600

Jan.

257

257

257

252

250

250

250

250

250

252

250

250

250

252

257

262

260

257

257

257

27S

262

257

250

250

250

250

250

250

243

250

600

710

710

710

710

600

835

835

740

835

900

710

683

655

710

770

970

1,110

Q7fi

803

710

628

Q7H

970

OOK

970

835

Feb.

243

250

250

250

250

250

250

255

255

250

250

255

255

250

255

255

257

255

255

257

250

255

243

250

250

250

250

255

835

710

710

710

770

710

770

710

710

770

s^

970

970

770

710

QAO

QOrt

Q7fi

1 AAfl

1 000

OQE:

710

710

710

Ann

fiftft

710

fiftft

Mar.

250

250

250

250

250

250

250

255

250

250

250

250

250

250

250

255

255

255

250

238

233

238

238

917

1 '580 050

460

740

1,330

2 99O

740

740

710

171

528

628

440

401

401

460

483

483

eftC

KAC

483

460

440

483

440

440

483

Apr.

2.370

2,270

2,820

3,400

2,780

1,740

1,320

2,050

2,200

2,160

1,290

1,300

1,270

1,270

1,280

1,330

1,330

1,340

1,300

1,260

1,270

1,250

1,240

570

565

565

560

550

550

401

401

381

401 001

401

381

401

364

364

364

381

364

001

364

OOf

364

364

364

364

364

o *n

OQO

009

000

°»17

May.

1,080

560

1,290

1,320

1,350

1,360

1.350

2,740

2,180

1,750

1,290

2,220

1,300

1.250

575

580

580

580

1,300

1,330

1,300

1,300

1,290

1,330

1,290

590

580

565

565

585

575

332

332

332

332

332

332

332

000

332

332

332

381

347

347

347

347

Qon

316

347

347

347

420

401

QC1

347

347

364

June.

570

611

1,290

595

580

570

570

585

580

580

835

580

575

570

575

1,890

835

585

1,210

1,330

1,960

1,330

1,330

1,330

1,330

2,500

1,610

1,320

1,330

1,290

364

347

347

347

381

381

483

381

347

347

347

347

835

935

628

483

ini

rnK

460

440 OO-i

Q01

OO-i

QQ1

July.

1.630

1.000

900

802

682

802

1.270

1,430

1,110

1,310

970

770

655

1,550

1,470

1,150

868

802

682

655

655

eoo

550

600

770

1,510

1,790

1,710

6,000

2,000

1,390

381

381

347

347

347

347

347

347

332

420

347

347

347

347

316

288

302

900

294

OftC

OQO

OOO

OQO

302

OAO

347

347

332

Aug.

1,080

970

935

900

802

710

710

682

628

528

505

460

460

600

770

740

528

550

505

505

505

469

616

469

460

400

381

400

378

374

350

316

316

288

288

288

302

302

316

316

316

2.88

288

01 a

401

AAf\

440

440

420

4 660

I'llO

710

600

575

EOCJ

460

460

460

Sept.

350

347

341

316

316

316

310

305

288

291

288

291

288

288

322

51,800

16,300

3,780

3,220

1,810

24,400

35,200

7,980

3,780

3,640

3,840

3,840

4,170

5,080

4,240

460

460

460

460

460

440

460

440

420

420

420

420

420

001

QQ1

QQ1

OQ1

001

QQ1

QQ1

QQ1

347

347

347

347

364

1 QEfl

CAR
132 SURFACE WATER SUPPLY, 1919-1920, PART VIII.

Monthly discharge of Pecos River near Comstock, Tex.,for the years ending Sept. 30, 1919

and 1920.

Month.

1918-19. 

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

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

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

Mav.. ......................................... ..........

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

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

1919-20. 

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

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

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

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

Julv.. ....................................................

Discharge in second-feet.

Maximum.

1,550 

550 

260 

278 

257 

2,270 

3,400 

2,740 

2,500 

6,000 

1,080 

51,800

51, 800

5,220 

1,910 

935 

1,110 

1,000 

740 

440 

575 

1,150 

420 

4,660 

1,350

5,220

Minimum.

126 

233 

257 

243 

243 

233 

550 

560 

570 

550 

350 

288

126

1,590 

803 

600 

600 

600 

401 

332 

316 

347 

288 

288 

347

288

Mean.

340

265 

259 

254 

252 

472 

1,460 

1,160 

1,030 

1,230 

593 

5,920

1,100

2,480 

1,160 

727 

782 

780 

514 

374 

353 

490 

333 

560 

439

751

Run-off in 

acre-feet.

20,900 

15,800 

15, 900 

15,600 

14,000 

29,000 

86,900 

71,300 

61,300 

75,600 

36,500 

352,000

795,000

152,000 

69,000 

44,700 

48,100 

44,900 

31,600 

22,300 

21,700 

29,200 

20,500 

34,400 

26,100

544,000

Days of deficiency in discharge of Pecos River near Comstock, Tex., for the years ending

Sept. 30, 1901-1920.

Discharge 

in secondfeet.

100.....

150.....

200.. .. 

250.. . 

300. . . 

350. . . 

400. . . 

450. . . 

500.. . 

600.. . 

700.. . 

800-. . 

900.. . 

1,000.. . 

1, 200. . . 

1,500.. . 

1, 800, . . 

2, 200. . . 

2,600.. . 

3,000.. . 

3,500.. . 

4,000.. . 

5,000.. . 

7,000.. .. 

10,000.. ..

9n flnn

2

K f\f\f\

Days of deficient discharge.

1900-1

.........

29 

73 

88 

114 

143 

185 

251 

280 

299 

308 

313 

330 

345 

352 

360 

363 

363 

363 

363 

364 

364 

365

On nnA

OK f\(\f)

07 AftA

1

1901-2

20 

57 

81 

108 

127 

. 165 

208 

256 

273 

290 

307 

326 

338 

345 

353 

360 

364 

364 

364 

'364 

364 

364 

364 

364 

365

1902-3

5 

59 

109 

125 

150 

232 

269 

333 

339 

- 345 

348 

350 

350 

352 

352 

365

1903-4

45 

130 

256 

291 

305 

306 

306 

309 

317 

326 

334 

344 

344 

346 

352 

354 

357 

357 

358 

361 

361 

362 

362 

362 

365 

366

1904-5 1905-6

18 

47 

107 

162 

176 

211 

247 

290 

315 

328 

338 

342 

345 

355 

362 

364 

365

16 

39 

98 

188 

255 

320 

325 

336 

354 

356 

359 

359 

359 

359 

359 

361 

361 

362 

362 

363 

363 

364 

364 

365

1906-7

3 

33

81 

83 

115 

175 

200 

316 

329 

361 

365

1907-8

12 

17 

63 

101 

128 

158 

186 

222 

258 

293 

313 

330 

350 

355 

355 

359 

364 

364 

364 

364 

364 

365 

366

1908-9

19

82 

157 

212 

293 

334 

338 

344 

348 

350 

352 

351 

353 

362 

365

1909-10

78. 

123 

238 

309 

345 

35O 

352 

353 

354 

357 

358 

358- 

359' 

363 

364 

364 

364 

364 

364 

361 

364 

364 

364 

364 

364 

364 

365-
BIO GRAKDE BASIN. 133

Days of deficiency in discharge of Pecos River near Comstock, Tex.,for the years ending 

Sept. 30, 1901-1920 Continued.

Discharge 

in pecond-

" feet.

inn

150.....

200. 

250. 

300. 

350. 

400. 

450. 

500. 

600. 

700. 

800. 

900. 

1,000. 

1,200. 

1,500. 

1.800. 

2,200. 

2,600. 

3,000. 

3,500. 

4,000. 

5,000. 

7,000. 

10,000. . 

15,000. . . 

20,000.....

25,000.....

'30,000.....

 35,000.....

37,000.....

52,000.....

Days of deficient discharge.

1910-11

21 

128 

217 

264 

295 

310 

321 

331 

336 

340 

343 

345 

347 

353 

356 

358 

363 

363 

363 

364 

364 

364 

364 

365

1911-12

54 

129 

187 

325 

363 

365 

365 

365 

365 

365 

365 

365 

365 

366

1912-13

10 

63 

150 

214 

255 

283 

299 

305 

316 

325 

331 

335 

339 

346 

352 

353 

357 

359 

359 

359 

360 

361 

362 

362 

362 

365

1913-14

is

91 

130 

151 

193 

216 

239 

272 

285 

297 

310 

322 

331 

339 

347 

352 

353 

355 

356 

360 

361 

365

1914-15

28 

57 

76 

141 

193 

240 

281 

290 

303 

321 

331 

333 

337 

344 

346 

350 

354 

361 

362 

363 

363 

363 

364 

364 

365

1915-16

65 

121 

181 

211 

243 

273 

287 

300 

320 

337 

342 

344 

353 

359 

362 

364 

364 

364 

364 

364 

364 

365 

365

1916-17

28 

123 

185 

220 

237 

261 

299 

342 

355 

359 

362 

362 

363 

365

1917-18

50 

260 

347 

355 

356 

357 

359 

359 

360 

360 

360 

360 

360 

360 

361 

362 

363 

363 

363 

363 

364 

364 

365

1918-19

9 

15 

28 

171 

182 

189 

190 

196 

238 

250 

258 

266 

271 

277 

323 

332 

339 

346 

349 

351 

356 

358 

360 

361 

361 

362 

363 

363 

363 

364 

365

1919-20

12 

81 

123 

159 

183 

198 

216 

269 

291 

313 

323 

326 

345 

352 

356 

358 

361 

361 

365 

366

102723 22 WSP 508 10
134 SURFACE WATER SUPPLY, 191&-1920, PART VIII.

MISCELLANEOUS MEASUREMENTS.

Miscellaneous discharge measurements in Texas during the years ending Sept. 30, 1919

and 1920.

Date.

1920. 

Aug. 21

30

30

31

Sept. 1

2

3

4

5

Aug. 30 

31

Sept. 1

4

July 12

Mar. 6

1919. 

Jan. 9

1920.

26

July 10

1918. 

Oct. 30

31

1919. 

Feb. 9

9

1918. 

Nov. 2

2

1919. 

Feb. 9

8

May 8

8

8

8

Aug. 23

20

20

21

1920.

July 26

1919. 

"Hop 1

Stream.

West Fork of Trinity River. 

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

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

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

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

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

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

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

Elm Fork of Trinity River. 

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

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

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

San Saba River. ... ........

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

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

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

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

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

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

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

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

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

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

Leon Springs and wells. . . . 

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

Tributary to 

Trinity River..... 

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

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

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

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

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

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

Trinity River..... 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Pecos River, ...... 

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

Locality.

Fort Worth, Tex., below 

Clear Fork. 

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

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

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

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

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

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

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

Record crossing near Dallas, 

Tex. 

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

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

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

20 miles above San Saba. 

Tex.

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

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

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

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

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

Fen tress, Tex ...............

of Luling, Tex.

well, Camp Travis, near 

San Antonio, Tex. . .

above Farmers well, Camp 

Travis, near San Antonio, 

Tex.

Camp Travis, near San 

Antonio, Tex. 

300 feet above confluence

with San Antonio River, 

near San Antonio. Tex.

bine, Camp Travis, near 

San Antonio, Tex.

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

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

Near Fort Stockton, Tex....

.... .do. : . ...................

above well known as 

"Honey well."

Gage 

height.

Feet. 

1.73

3.60

25.70

27.17

28.39

"V\ 7Q

30.39

20.17

17.41

10.63 

11.75

13.96

4.84

........

........

DischargeSec.-ft. 

219

1 740

6,700

7,630

8,770

10 400

9 960

3

Qft/>

3 9 W

6,200 

6,560

8 CO A.

1,070

135

17 *

2.2-

17.2

17.9-

8.4

18.7"

328

31S

205

226 

65. &

76.4

96. S

10.8

3.0

14. &.

24.0-

41.6-

9.6

381

34.7 3.9-

4. &

44.5

26. »

20
INDEX.

A. 

Acre-foot, definition of....................... 2

Accuracy of data and records, degrees of..... 4-5

Angeles, Tex., Pecos River near........... 121-124

Appropriations, record of.................... 1

Austin, Tex., Barton Springs at............. 63-64

Colorado River at....................... 33-37

evaporation near........................ 37-38

Authorization of work....................... 1

B. 

Ballinger, Tex., Colorado River at........... 25-27

Balmorhea, Tex., Griffin Spring near........ 134

San Solomon Spring near................ 134

Saragosa Springnear.................... 134

Barstow, Tex., Pecos River above......... 124-126

Barton Springs at Austin, Tex.............. 63-64

Belmont, Tex., Guadalupe River at......... 134

Blanco River at San Marcos-Luling crossing,

Tex............................. 134

Brazos River at Brazos, Tex................. 10-11

at Waco, Tex............................ 12-15

Clear Fork of, near Eliasville, Tex....... 18-20

near College Station, Tex................ 15-17

near Graham, Tex....................... 9-10

Brazos River basin, Tex., gaging-station 

records in.................................. 9-23

Bridgeport, Tex., West Fork of Trinity River

at............................*:.. 6-8

Bronte, Tex., Colorado River near........... 23-25

C. 

CalaUen, Tex., Nueces River at.............. 95-96

Calaveras, Tex., San Antonio River at....... 85-87

Cameron, Tex., Little River at.............. 20-23

Carlsbad, N. Mex., Pecos River at......... 117-119

Chad wick, Tex., Colorado River near........ 28-30

Cinonia, Tex., Nueces River near............ 89-92

Clear Creek near Menard, Tex............... 134

College Station, Tex., Brazos River near..... 15-17

Colorado River at Austin, Tex............... 33-37

at Ballinger, Tex........................ 25-27

at Columbus, Tex....................... 38-41

at Marble Falls, Tex..................... 31-33

at Wharton, Tex........................ 41-44

near Bronte, Tex........................ 23-25

near Chadwick, Tex..................... 28-30

Colorado River basin, Tex., gaging-station

records in........................ 23-64

Columbus, Tex., Colorado River at.......... 38-41

Comfort, Tex., Guadalupe River near...... 64-67

Computations, results of, accuracy of........ 4

Comstock, Tex., Pecos River near......... 130-133

Concho River near Paint Rock, Tex......... 50-52

near San Angelo, Tex.................... 47-50

Control, definition of........................ 2

Cooperation, record of....................... 5

Corpus Christi, Tex., cooperation by......... 5

Cuero, Tex., Guadalupe River below........ 73-76

D.

Current meters, Price, plate showing......... 2

Dallas, Tex., Elm Fork of Trinity River near. 134

Trinity River at......................... 134

Data, accuracy of............................ 4

explanation of........................... 3-4

Dayton, N. Mex., Pecos River near........ 113-116

Definition of terms.......................... 2-3-

Del Rio, Tex., Devils River near............ 134

Derby, Tex., Frio River near................ 96-98

Devils River, Tex., Rio Grande near...... 112-11&

Devils River near Del Rio, Tex.............. 134

E.

Elephant Butte dam, N. Mex., Rio Grande

below.......................... 105-106.

Eliasville, Tex., Clear Fork of Brazos River

near............................. 18-2&

Ellsworth, C. E., and assistants, work of..... 5-

Evaporation near Austin, Tex............... 37-38

F.

Fentress, Tex., San Marcos River at........ 134

Fort Stockton Springs near Fort Stockton,

Tex............................. 134

Fort Stockton, Tex., Leon Springs and wells

near............................. 134

Fort Worth, Tex., West Fork of Trinity

River at......................... 134

Fowlerton, Tex., Frio Lake outlet near.... 100-102

Frio River at............................99-100

Friez water-stage recorder, plate showing.... 3

Frio Lake outlet near Fowlerton, Tex..... 100-102

Frio River at Fowlerton, Tex............... 99-100

near Derby, Tex......................... 96-98

G.

Gaging station, typical, plate showing....... 2

Garwood Irrigation Co., Cooperation by...... 5

Gonzales-Luling crossing, Tex., Plum Creek

at............................... 134

Gonzales, Tex., Guadalupe River near....... 70-73

Graham, Tex., Brazos River near............ 9-10

Grandfalls, Tex., Pecos River near......... 126-129

Griffin Spring near Balmorhea, Tex......... 134

Guadalupe River at Belmont, Tex........... 134

at New Braunfels, Tex.................. 67-70

atSeguin, Tex........................... 134

belowCuero, Tex........................ 73-76

near Comfort, Tex....................... 64-67

near Gonzales, Tex...................... 70-73

Guadalupe River basin, Tex., gaging-station

records in........................ 64-81

Gurley printing water-stage recorder, plate

showing......................... 3

I. 

Imperial Irrigation Co., cooperation by...... 5

135
136 INDEX.

J. Pago.

Junction, Tex., Llano River near............ 60-63

North Llano River near................. 58-60

L.

Lakeside Irrigation Co., cooperation by...... 5

Lamoureux, V. B., work of.................. 6

Langtry, Tex., Rio Grande at............. 110-112

Leon Springs and wells near Fort Stockton,

Tex............................. 134

Little River at Cameron, Tex................ 20-23

Llano River near Junction, Tex............. 60-63

Luling, Tex., San Marcos River at........... 134

M.

Marble Falls, Tex., Colorado River at........ 31-33

Markham Irrigation Co., cooperation by..... 5

Martindale, Tex., San Marcos River at....... 134

Menard, Tex., Clear Creek near.............. 134

Noyes canal near........................ 134

San Saba River at....................... 53-55

New Braunfels, Tex., Guadalupe River at... 67-70 

North Concho River at San Angelo, Tex..... 44-47

North Llano River near Junction, Tex....... 58-60

Noyes canal near Menard, Tex............... 134

Nucces River at Calallen, Tex............... 95-96

nearCinonia, Tex....................... 89-92

near Three Rivers, Tex.................. 92-94

Nucees River basin, Tex., gaging-station

records in...................... 89-102

O. 

Ottine, Tex., San Marcos River at........... 79-81

P.

Paint Rock, Tex., Concho River near........ 50-52

Pecos River above Barstow, Tex.......... 124-126

at Carlsbad, N. Mex................... 117-119

near Angeles, Tex..................... 121-124

near Comstock, Tex................... 130-133

near Dayton, N. Mex.................. 113-116

near Grandfalls, Tex................... 126-129

near Malaga, N. Mex.................. 119-120

Pecos Valley Lines, cooperation by.......... 5

Peterson, B. J. work of...................... 6

Pierce estate, cooperation by................. 5

Plum Creek at Gonzales-Luling crossing, Tex. 134 

Presidio, Tex., Rio Grande above.......... 107-108

Rio Grande below..................... 108-110

Price current meters, plate showing.......... 2

R.

Rio Grande above Presidio, Tex........... 107-108

at Langtry, Tex....................... 110-112

below Elephant Butte dam, N. Mex... 105-106

below Presidio, Tex.................... 108-110

near Devils River, Tex................. 112-113

near San Marcial, N. Mex.............. 102-104

Rio Grande basin, Tex., N. Mex., gagingstation records in.............. 102-133

S. Page.

Run-oft* in inches, definition of ............... 2

Salado Creek near San Antonio, Tex. ........ 131

San Angelo, Tex., Concho River near. ....... 47-50

North Concho River at.... .............. 44-47

San Antonio River at Calaveras, Tex. ....... 85-87

at San Antonio, Tex..................... 82-84

San Antonio River basin, Tex., gaging-station

records in ........................ 82-89

San Antonio, Tex., cooperation by........... 5

SaladoCreek near........................ 134

San Pedro Creek at...................... 87-89

San Marcos-Luling crossing, Tex., Blanco

River at......................... 134

San Marcos River at Fentress, Tex. .......... 134

at Luling, Tex. .......................... 134

at Martindale, Tex....................... 134

at Ottine, Tex........................... 79-81

at San Marcos, Tex...................... 76-79

San Pedro Creek at San Antonio, Tex.... . . . . 87-89

San Saba River at Menard, Tex. ............. 53-55

San Saba River near San Saba, Tex ..... 55-57, 134

San Solomon Spring near Balmorhea, Tex. . . 131 

Saragosa Spring near Balmorhea, Tex. . ...... 134

Second-foot, definition of .................... 2

Second-foot per square mile, definition of. ... 2

Seguin, Tex. , Guadalupe River at ........... 134

Stage-discharge relation, definition of ........ 2

Stevens continuous water-stage recorder,

plate showing. ................... 3

T. 

Terms, definition of. ......................... 2-3

Texas, cooperation by. ...................... 5

Texas & Pacific Railway, cooperation by .... 5

Three Rivers, Tex., Nueces River near. ..... 92-94

Trinity*River at Dallas, Tex. ................ 134

Elm Fork of, near Dallas, Tex. .......... 134

West Fork of, at Bridgeport, Tex. ....... 6-8

West Fork of, at Fort Worth, Tex. ...... 134

Trinity River basin, 'Tex., gaging-station

records in.. ...................... 6-8

U.

United States Reclamation Service, cooperation by .......................... 5

United States Weather Bureau, cooperation

by............................... 5

W.

Waco, Tex., Brazos River at................. 12-15

cooperation by ........................... 5

Water-stage recorders, plate showing. ........ 3

Wharton County Association, cooperation by 5 

Wharton County, Tex., cooperation by. ..... 5

Wharton, Tex., Colorado River at ........... 41-44

Work, authorization of. ..................... 1

division of ............................... 6

scope of .................................. 1-2

Z.

Zero flow, point of, definition of ............. 3

O