DEPARTMENT OF THE INTERIOR

ALBERT B. FALL, Secretary

UNITED STATES GEOLOGICAL SURVEY

GBOBGB OTIS SMITH, Director

Water-Supply Paper 478

SURFACE WATER SUPPLY OF THE 

UNITED STATES

1918

PART VIII. WESTERN GULF OF MEXICO BASINS

NATHAN C. GROVER, Chief Hydraulic Engineer

GLENN A. GRAY and C. E. ELLSWORTH, District Engineers

Prepared in cooperation with the 

STATE OF TEXAS

WASHINGTON

GOVERNMENT PBINTING OFFICE 

1922
ADDITIONAL COPIES

OF THIS PUBLICATION MAT BE PEOCTBED FEOM

, THE SUPERINTENDENT OF DOCUMENTS

GOVEENMENT PEENTING OFFICE

WASHINGTON, D. C.

AT 

10 CENTS PER COPY
CONTENTS.

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

{Saging-station records..................................................... 6

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

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

Brazos River basin...................................................... 8

Brazos River near Graham, Tex................................... 8

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

Brazos River at Waco, Tex........................................ 11

Brazos River near College Station, Tex............................. 14

Clear Fork of Brazos River near Eliasville, Tex..................... 16

Little River at Cameron, Tex..................................... 18

Colorado River basin................................................. 20

Colorado River near Bronte, Tex....................................... 20

Colorado River at Ballinger, Tex................................... 22

Colorado River near Chadwick, Tex............................... 24

Colorado River at Marble Falls, Tex............................... 26

Colorado River at Austin, Tex...................................... 28

Evaporation near Austin, Tex..................................... 30

Colorado River at Columbus, Tex................................... 31

Colorado River at Wharton, Tex.................................... 33

Colorado River seepage investigations............................... 34

North Concho River at San Angelo, Tex .......... r ................ 36

Concho River near San Angelo, Tex.. .....................^........ 38

Concho River near Paint Rock, Tex................................. 40

Concho River seepage investigations................................ 42

Pecan Bayou at Brownwood, Tex................................... 45

San Saba River at Menard, Tex.................................... 47-

San Saba River near San Saba, Tex................................ 49

San Saba River seepage investigations.............................. 51

North Llano River near Junction, Tex.............................. 52

Llano River near Junction, Tex................................. i.. 54

Llano River seepage investigations................................. 53

Barton Creek at Austin, Tex....................................... 57

Guadalupe River basin................................................ 59

Guadalupe River near Comfort, Tex................................ 59

Guadalupe River at New Braunfels, Tex........................... 61

Guadaupe River near Gonzales, Tex............................... 63

Guadalupe River below Cuero, Tex................................ 65

San Marcos River at San Marcos, Tex.............................. 67

San Marcos River at Ottine, Tex.................................. 69

HI
17 CONTENTS.

Gaging-station records Continued. Page.

San Antonio River basin............................................... 71

San Antonio River at San Antonio, Tex............................. 71

San Antonio River at Calaveras, Tex............................... 73

San Pedro Greek at San Antonio, Tex.............................. 75

Nueces River basin................................................... 77

Nueces River near Cinonia, Tex..-., ................................ 77

Nueces River near Cotulla, Tex.................................... 79

Nueces River near Three Rivers, Tex.............................. 80

Nueces River at Calall$n, Tex....................................... 82

Frio River near Derby, Tex.................................. 1... '.. $3

Frio River at Fowlerton, Tex...................................... ^5

Frio Lake outlet near Fowlerton, Tex.-............................. 8>6

Rio Grande basin...................................................... 88

Rio Grande at San Marcial, N. Mex................................ '88

Rio Grande below Elephant Butte dam, N. Mex.................... 90

Pecos River near Dayton, N. Mex.................................. 91

Pecos River at Carlsbad, N. Mex................................... 93

Pecos River near Angeles, Tex..................................... 95

Pecos River above Barstow, Tex.......... . ........................ 97

Pecos River near Grandfalls, Tex................................... 99

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

Pecos River seepage investigations ............................... 103

Miscellaneous measurements.............................................. 104

Index.................................................................... 105

ILLUSTRATIONS.

PI*ATE I. A, Price current meters; B, Typical gaging station................

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

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

MEXICO BASINS, 1918.

AtFTHtmiZATMMT AND SCOPE OF WORK.'' "

This vo3#me is one,of series of 14 reports presenting, records of

measurements of f|ow ?iaade on streams in the United States during 

the year ending September 30, 1918.

Tie data presented1 in ^hese 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 1888 hi connection with special studies 

relating td 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 gagiijg 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.

AnnueA appropriations for the fiscal years ending June 30, 1895-1919.

1899... .................................................. $12,500.tOO ,

1896,.. ......................... ......................... £0, 000. -00,.

1897 to 1900, inclusive ,.......:..!... t .................... 60, 600. 00 .

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

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

1907...........................................;.,....... 150, (too. 00

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

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

1918.................................................... 175,000.00

1919 .................................................. . . 148, 244, 10

In the execution of the work many private and State organizations 

Eave 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; coopera-' 

tion of the second kind is acknowledged on page 51

Measurements of stream flow have been made at about 4,510 

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

the Hawaiian Islands. In July, 1918, 1,180 gaging stations were

l
2 SURFACE WATER SUPPLY, IMS, PABT VIII.

being maintained by the Surrey and the cooperating organizations. 

Many miscellaneous discharge measurements are 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 ajid will t>e made 

available in water-supply papers from time to time.

DEFINITION OF TEBM8*

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 inay be divided 

into two groups (1) those that represent a rate of flow, as secondfeet, gallons per minute, miners' inches, and discharge in secondfeet per square mile, and (2) those that represent the actual quantity 

of water, as run-off in inches, and acre-feet. The principal terms 

used in this series of reports are second-feet, second-feet per square 

mile, run-off in inches, acre-feet, and millions of cubic 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 channel below the gage which determine the stage-discharge* 

relation at the gage. It should be noted that the control may not 

b.e the same section or sections at all stages.

The "point of zero flow" for a given gaging station is that point7- 

on the gage the gage height to which the surface of the river falls 

when the discharge is reduced to zero.
U. S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER 478 PLATE I

A .PRICE CURRENT METERS

B. TYPICAL GAGING STATION.
U. S. GEOLOGICAL SURVEY WATER- SUPPLY PAPER 478 PLATE II

A. STEVENS CONTINUOUS. B. GURLEY PRINTING. 

WATER-STAGE RECORDERS.

C. FRIEZ.
SURFACE WATER SUPPLY, 1918, PART VIII. 3 

EXPLANATION OF DATA.

The data presented in this report cover the year beginning October 

1, 1917, and ending September 30, 1918. At the beguming 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 I 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 deterininiag 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 dicharge for any stage, and these rating tables, when applied 

to the gage heights, give the discharge from which the daily, monthly* 

and yearly means of discharge are determined.

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

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

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 height and records 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 permanence 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 

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.
4 SURFACE WATEE SUPPLY, 19>18, PART VIII,

If such stations are equipped with waters-stage recorders 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 headed 

"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 per second during the month. On this 

average flow computations recorded in the remaining columns, which 

are defined on pages 2, are based.

ACCURACY OF FIELD DATA AND COMPUTED RECORDS,

The accuracy of stream-flow data depends primarily (1) on the 

permanence of the discharge relation and (2) on the accuracy of 

observation of stage, measurement of flow, and interpretation of 

records.

A paragraph in the description of the station 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 height to the rating table to obtain 

the daily discharge.

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

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

witnin 10 per cent; "poorly denned," 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 

showing discharge per square mile and depth of 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 J 

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" an<f
DIVISION OF WORK. 5

"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.

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.

During the year ending September 30, 1918, the work of measuring 

streams in Texas and the seepage investigations were carried on in 

cooperation with the State through the Board of Water Engineers, 

consisting of W. T. Potter, chairman; R. J. Windrow, C. S. Clark, 

John A. Norris, and James Hayes Quartes, secretary.

The United States Reclamation Service and the United States 

Weather Bureau furnished equipment and general assistance in 

the Rio Grande, Pecos, upper Trinity, and Brazos River basins. 

The United States Weather Bureau furnished most of the equipment 

for the evaporation station near Austin.

The cities of Austin, Corpus Christi, and Waco, the San Marcos 

Utilities Co., the Imperial Irrigation Co., and the Kansas City, 

Mexico & Orient Railroad, San Antonio, Uvalde & Gulf Railroad, 

Pecos Valley lines, Texas & Pacific Railway, Gulf, Colorado & Santa 

Fe Railway, and International & Great Northern Railway have aided

in collecting records by furnishing funds or giving general assistance. \

DIVISION OF WORK.

Ihe'data for stations in "Texas were collected and prepared for 

publication under the direction of Glenn A. Gray and C. E. Ellsworth, district engineers, assisted by Russell J. Hank, C. E. McCashin, 

E. P. Congdon, A. K. Gowans, H. B. Kinnison, and W. H. Dodd, 

State hydrographer.

The manuscript was assembled and reviewed by W. R. King and 

E. L. Williams.
SURFACE WATER SUPPLY, 1918, PART VIII.

- STATION RECORDS.

TRINITY RIVER BASIN. 

WEST FORK OF TRINITY RIVER AT BRIDGEPORT, TBX'

LOCATION. At suspension bridge on Belsora-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 (revised).

RECORDS AVAILABLE. October 1, 1914, to September 30, 1918. Records of stage 

have been obtained by United States Weather Bureau since August 16, 1908.

GAGE. Weight and tape gage of the Mott type, 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.

CHANNEL 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 100 feet. Control is a rock outcrop three-quarters of a mile 

below station.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 18.35 feet at 

6 p. m. April 17 (discharge, 5,850 second-feet); no flow October 11-12, October 15, 

November 27, February 21 to March 2, March 10-28, August 3-23.

1908-1918: Maximum stage recorded, 28.9 feet June 8, 1915 (discharge not 

determined) ; no flow in stream during several periods.

ICE. None reported during year.

DIVERSIONS. None. There are a few small pumping plants along the stream, but 

these produce little noticeable effect.

REGULATION. None.

ACCURACY. Stage-discharge relation changes slightly. Rating curve well defined. 

Gage read to hundredths twice daily. Daily discharge ascertained, by applying 

mean daily gage height to rating table. Records good, except September 23-30, 

when gage was broken, and gage heights were estimated by observer.

/

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

year ending Sept. SO, 1918.

Date.

Oct. 18

Nov. 26

Dec. 27

Made by 

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

Gage 

height.

Feel. 

0.73

.93

Discharge.

Sec.-ft. 

0.0

.0

«.9

Date.

Mar. 18

May 16

Made by 

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

Gage 

height.

Feet.

1.97

4.42

Discharge.

Sec.-ft. 

0.0

36.6

524

a Estimated.

i Published in earlier reports as Trinity River at Bridgeport, Tex.
TBOttTY BIVEK BASIN.

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

year ending Sept. 30, 1918.

Day.

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

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

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

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

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

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

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

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

9v.............

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

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

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

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

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

1ft..............

1*.,.'.. .........

17.,. ........... is

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

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

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

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

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

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

25.. ..

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

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

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

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

80..............

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

Oct.

3.1 

2.4 

1.8 

1.1 

1.1

1.2 

.4 

2.0 

2.5 

.3

.0 

.0 

1,0 

1.4 

.0

.0 

,0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0 

_-0

Nov.

0.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

6.8 

12.0 

6.0

Dec.

3.5 

2.1 

2.0 

2.0 

1.8

1.6 

2.4 

2.4 

2.5 

2.4

2.2 

2.0

1.8 

1.6 

1.5

1.4

1.5 

1.6 

1.8

1.6

1.6 

1.8 

2.0 

2.1 

2.2

2.0 

2.0 

1.8 

1.7 

1.7 

1.6

Jan.

1.6 

1.5 

1.3 

1»0

.7

' .7 

.5

.fi 

.4 

.5

.6

.7 

.7 

.8 

1.1

1.0 

1.1 

1.1 

1.1 

1.1

1.0 1.1 1.1

1.4 

1.2

1.0 

.9 

.9 

.9 

.9 

.8

Feb.

0.8 

,7 

.6 

.5 

.5

.5 

.5 

.5 

.6 

.6

.7 

.7 

.7 

.7 

.7

.6 

.5 

.4 

.3 

.1

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0

Mar.

0.0 

.0

.8 

.7 

.4

.3 

.2 

.2 

.1 

.0

.0 

.0 

.0 -.0

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

21 

28 

20

Apr.

21 

19 

18 

17 

449

1,160 

777 

465 

181 

124

718.8

921 

1,890 

1,370

2,380 

5,620 

4,620 

3,130 

1,360

164 

23

18 

21 

23

12 

14 

106 

32

18

May.

13 

7.6 

3.9 

2.5 

1.9

i.a

1.7 

l.« 

1.8 

2.2

2.0 

56 

38 

8.5 

2.2

32 

26 

1,110

1,180 

849

652 

206 

86 

49 

26

as

5.0 

2.4 

1.7 

1.1

a

June.

1.6 

29

8.2 

8.2 

4.8

7.0 

90 

7S1 

1,590 

1,060

993 

916 

385

74 

51

32 

12 

9.4 

6.8 

4.5

7.0 

4.3 

2.4 

2.1 

1.8

1.4 

1.3 

1.7 

2.2 

2.1

July

2.0 

1.9 

34 

17. 

7.6

6.0 

4.5 

3,3 

2.4 

1.9

1.5 

2.1 

268

8.5 

4.8

18 

14 

25 

42 

25

12 

7.6 

4.1 

2.2 

2.0

1.6 

1.3 

.9 

.7 

.4 

.5

Aug.

0.3 

.1 

.0 

.0 

 0

lo

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

.0 

.0

.0 

.0 

.0 

3d 

16

3.5 

1.9 

1.5 

LO 

.7 

.3

Sept.

0.1 

,0 

.6 

.4 

1.4

112 

580 

461 

119 

34

19

10 

7.0 

4.8 

2.7

2.0 

1.6 

1.2 

.9 

192

17

as

4.5 

2.9 

2.0

2.3 

1.9 

1.5 

1.3 

1.0

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

Sept. SO, 1918.

Month.

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

March April.....................................................

Mfcy.. ....................................................

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

Discharge in second-feet.

Maximum.

3.1 

12 

3.5 

1.6

.8 

28 

5,620 

1,180 

1,590 

268 

89 

580

5,620

Minimum.

0.0 

.0 

1.4 

.4 

.0 

.0

as

.8 

1.3 

.4 

.0 

.0

.0

Mean.

0.59 

.83 

1.94 

.95 

.40 

2.31 

834 

141 

202 

16.9 

3.69 

53.1

104

»

Run-off 

in acre-feet.

36.3 

49.4 

119 

58.4 

22.2 

142 

4% 600 

8,670 

12,000 

1,040 

227 

3,160

75,100
SURFACE WATER SUPPLY, 1918, 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.

RECORDS AVAILABLE. November 13, 1915, to September 30, 1918. 

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 is com^

posed of sand and clay and is free from vegetation; shifting. Left bank high;.

 and not subject to overflow; right bank is of medium height and is overflowed

during high stages. 

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 9.5 feet at 9 a. m, :

September 5 (discharge, 4,100 second-feet; from extension of rating curve and

subject to possible error); no flow October 21 to November 27, December 2 te;

April 4, April 30 to May 16, June 27 to July 10, July 13-14, July 17 to September 30. 

1916-1918: Maximum stage recorded, 9.5 feet at 9 a. m., September 5,1918, and,

at 6 p. m., April 2, 1916 (discharge, 4,100 second-feet; from extension of rating

curve, and subject to possible error); no flow during several periods. 

ICE. Slight amount of ice reported in January. 

DIVERSIONS. No information available to show that water is diverted above station

for irrigation in any large quantity; no diversions between station and mouth of

Clear Fork. 

REGULATION. Number of power plants and controlling works above station not

known; gage heights do not indicate that flow is regulated. 

ACCURACY. Stage-discharge relation not permanent; not affected by ice during the

year. Rating curve poorly defined. Gage read to hundredth^ once daily.

Daily discharge ascertained by shifting-control method. Discharge determinations above 1,000 second-feet obtained from an extension of rating curve; subject

to considerable error. Records poor.

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

30, 1918.

Date.

Oct. 19

Nov. 27

Dec. 28

Mar. 19

Made by 

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

E. P. Congdon.........

Gage 

height.

Feet. 

3.«9

3.65

3.75

3.20

Discharge.

Sec.-ft. 

<»0.5

.0

.0

.0

Date.

May 18

19

21

Made by 

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

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

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

 *.

Feet. 

5.84

5.02

4.57

6.69

Pischarge.

See.'Jt. 

421

7&>

l&O

1,530

<> Estimated.
gl

Oi*. OOO

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10 SURFACE WATEB SUPPLY, 1918, PART VIII.

BRAZOS RIVER AT BRAZOS, TEX,

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

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

DRAINAGE AREA. 20,200 square miles (revised), >

RECORDS AVAILABLE. October 1, 1914, to September 30, 1918. Records of stage 

have been obtained by the United States Weather Bureau since August 16,1808.

GAGE. Vertical staff on northwest side of center pier of railway bridge and 1 foot frwn 

upstream edge; graduations above 6 feet painted on the .pier; read by L. W. 

'Boyett.

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 slightly. 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 OF DISCHARGE. Maximum stage recorded during year, 8.00 feet at 7 a. m. 

June 10 (discharge, 27,000 second-feet; subject to error); no flow November 10-30, 

February 22-28, March 1-2, March 8 to April 5, and August 9 to September 3.

1908-1918: Maximum stage recorded, 22.0 feet May 24, 1908 (discharge not 

determined); no flow several times during period of record.

ICE. Slight amount of ice reported in December, January, and February.

DIVERSIONS. A few pumping plants have been installed along the stream for irrigating small areas, but do not greatly affect the flow of the stream.

REGULATION. Flow unaffected by power plants, dams, or reservoirs above or immediately below station.

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

defined below ]2,000 second-feet; extended above 12,000 second-feet. Gage read 

to half-tenths twice daily. Daily discharge ascertained by applying daily gage 

height to rating table and by shifting-control method. Records poor.

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

SO, 1918.

Pate.

-Oct. 17

Nov. 25

Dec. 23 Feb. 6

Made by 

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

Gage 

height.

Feet. 

0.75

.30

40

.40

Discharge.

See.-ft. 

15.2

.0

«.2

«.8

Date.

Mar. 21

May 11

24

Made by 

E. P. Congdon.. .......

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

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

Gage 

height.

Feet.

0.72

4.02

6.38

Discharge.

 "ft

16,7

2.820

10,60Q

a Estimated.
BRAZOS RIVER BASIN, 11

e, in second-feet, of Brazos River at Brazos, Tex,, for the year ending Sept. 

SO, 1918.

Day.

1.. ........

2..........

3..........

4..........

5..........

6..........

7..........

8..........

9...."...:..

10..........

11..........

12..........

13..........

14..........

15..........

16..........

17..........

18........;..

19..........

20..........

21..........

22..........

23..........

24..........

25..........

26..........

27..........

28..........

29..........

30..........

31..........

Oct.

220

220

194

170

170

146

126

126

105

90

90

75

64

64

64

53

39

29

29

23

23

21

18

15

13

12

10

10

8.2

7.0

7.0

Nov.

6.2

5.0

3.8

3.0

3.0

3.0

2.0

2.0

1.4

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

Dec.

3.0 22'

20

16

16

12

11

11

11

9.4

9.4

3.8

3.8

2.0

2.0

.9

.9

.9

.6

.8

.2

.2

.2

.2

.2

.2

.2

.2

.2

.2

.2

Jan.

0.3

.3

.3

.3

.3

.3

.4

.4

.4

.4

.4

.4

.5

.5

.2

.5

.5

.5

.5

.5

.5

.5

.6

.6

.7

.7

.7

.7

.7

.7

.7

Feb.

0.8

.8

.8

.8

.8

.8

.8

.8

, .8

.8

.9

.9

.9

.9

.9

.9

.4

.4

.4

.4

.2

.0

.0

.0

.0

.0

.0

.0

Mar.

0.0

.0

1.0

1.0

.8

.5

.2

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

Apr.

0.0

.0

.0

.0

.0

530

682

4,550

1,300

1,190

1,360

1,190

890

5.200

7,400

6,820

7,400

2,290

1,640

990

1,140

648

499

379

272

170

105

790

105

105

May.

105

105

81

89

35

35

33

23

21

13

13

13

13

12

7.0

7.0

7.0

1,520

11,700

12,100

6,120

10,000

11,000

3,040

1,410

890

530

438

324

220

170

June.

126

220

298

246

740

1,700

2,500

2,730

18,600

23,000

7,200

4,200

4,680

3,540

3,040

3,430

1,820

1,410

1,040

840

690

605

43S

340

288

236

194

185

13899-

July.

75

71

53

890

530

456

396

340

288

236

170

90

49

146

890

1.360

840

438

438

379

272

170

90

53

44

29

18

10

5.0

3.0

3.0

Aug.

3.0

3.0

2.0

1.0

1.0

.8

.5

.2

.0

.0

.0

.0

.0

.0

i .0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

.0

Sept.

0.0

.0

.0

4,200

16,000

16,000

6,820

7.400

2,860

2,220

1,560

1,370

1,290

1,210

1,300

1.220

1.150

474

1,010

l,76d

3,320

3,810

1,660

1.300

1,150

992

838

684

530

376

NOTE. Discharge determined by shifting-control method Dec. 2 to Feb. 21; Sept. 11-24, No record Sept. 

25-30; discharge interpolated.

Monthly discharge of Brazos River at Brazos, Tex., for the year ending Sept. 30, 1918.

Month.

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

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

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

220 

6.2 

22 

.7 

.9 

1.0 

7,400 

12,100 

23,000 

1,360 

3.0 

16,000

23,000

Minimum.

7.0 

.0 

.2 

.2 

.0 

.0 

.0 

7.0 

99.0 

3.0 

.0 

.0

.0

Mean.

72,3

.98 

5.11 

.48 

.54 

.11 

1,590 

1,940 

2,790 

285 

.37 

2,750

781

Sun-off

in 

acre-feet.

4,450 

58. 3 

314 

29.5 

30.0 

6.8 

94,600 

119,000 

166,000 

17,500 

22.8 

164,000

566,000

BRAZOS RIVER AT WACO, TEX.

LOCATION. At suspension bridge on Bridge Street, Waco, McLennan County, just 

below Southern Traction Co.'s bridge, 2£ miles below mouth of Bosque River, 

4£ miles above mouth of Cottonwood Creek, and about 9. miles above Lock No. 8.

DRAINAGE AREA. 25,500 square miles (revised).

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

to September 30, 1918. Record of stage has been obtained by United States 

Weather Bureau since August 9, 1900.
12 SURFACE WATER SUPPLY, 1918, PART VIII.

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

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

bridge Gage used from September 14,1898, to February 29,1908, was an inclined 

staff under left end of suspension bridge. Prom March 1, 1908, to December 31, 

1911, and October 1,1914, to December 5,1917, record was obtained from a chain 

gage oa 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 Traefion Co.'s bridge, the present location of the Gurley recorder. 

In 1902 a gage was marked off on the north pier of a new single span highway 

bridge about 300 feet above suspension bridge, and was used for high-water 

readings. From August 9, 1900, to May 21, 1902, the United States Weather 

Bureau used a vertical gage painted on pier nearest the center of the St. Louis 

Southwestern Railway bridge. From September 25, 1914, to March 23, 1915, 

during reconstruction of suspension bridge the chain gage was on highway bridge 

300 feet upstream. All gages wereinstalled at same datum, but readings probably 

differ slightly because of differences in location.

DISCHARGE MEASUREMENTS. Made from downstream side of first single-span highway bridge above station.

CHANNEL AND CONTROL. Bed composed of sand and gravel; shifting. Banks are 

clay, medium in height, have been improved by the city, and are overflowed at 

extremely high water. Channel straight above and below for several thousand 

feet. No defined control.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 17.50 feet at 

2 p. m. April 15 (discharge, 30,000 second-feet); no flow August 20-21.

1898-1918: Maximum stage recorded, 39.7 feet December 3, 1913 (discharge 

not determined); no flow August 20-21,1918.

ICE. None reported during year.

DIVERSION. No important diversions above station. Small areas of land are irrigated above, but quantity of water diverted is only a small percentage of the 

total flow.

REGULATION. None.

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

defined below 2,000 second-feet; poorly defined above that point. Gage read 

to half-tenths once daily October 1 to March 28, and from March 29 to September 

30, gage heights obtained by means of 7-day Gurley recorder. Discharge determined by applying mean daily gage height to rating table, and by shifting-control 

method. Records fair.

Discharge measurements of Brazos River at Waco, Tex., during the year ending Sept. SQ,

1918.

Date.

Oct. 20 Nov. 8

28

29

Feb. 5

Made by 

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

Gage 

height.

Feet. 

4.83

4.51

4.78

475

455

4.60

Discharge.

Sec.-)t. 

66.8

15.1

62.5

65.6

18.5

31.0

Date.

Mar. 8

May 4

Aug. 13

Made by Gage 

height.

Feet* 

4.60

5.85

7.89

3.85

3.77

Discharge.

8ec.-ft, 

32.7

425

1,880

1.3

0.6

a Estimated.
.l/sl-i ' BRAZOS RIVER BA§IH. l "IfDaily discharge,in$$cjmd*.feet,QfBragos River at ^aco, T«c,,/ar th$year enMng Sept. SO,

1918.

' Day.

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

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

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

4...,. ........

...... ........

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

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

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

9..,......:...

10..... A......

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

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

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

14..,-...... .

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

1«....... ......

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

18 .

19....,.,......,

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

21............. 22..:.........

23. «

84..,....!.....

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

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

27.:...........

28..........

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

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

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

Oct.

1,420 

836 

532 

365

284

255 

226 

192 

146 

134

128 

105 

72 

100/

86

77 

68 

68 

42 

37

42 

32 

28 

18 

IS

26 

28 

18 

16 

11 

9.6

 Nov.

9.8 

9.8 

9.8 

12 

11

9.8 

9.8 

9.8 

12 

12

12 

11 

11 

11 

10

10 

14 

81 

59 

32

23 

23 

18 

14 18' 

21 

21 

59 

59 

640

Dee.

349 

226 

134 

81

55

39 

50 

SI 

32 

32

22 

21

21

35 

22

18

22 

22 

28 

28

28 

28 

,28 

37 

37

37 

32 

37 

37 

13 

13

Jan.

28 

28 

< 35 

35 

22

18 

32 

22 

28 

22

SO 

48

55 

178 

50

72 

50 

50 

50 

50

42 

37 

42 46; 

46

46 

37 

42 

37 

37 

37

Feb.

39 

37 

35 

37

28

28 

28 

28 

28 

26

28 

28 

33 

28 

28

28

28 

22 

22 

22

22 

22 

22 

23 

21

18

14 

16

Mar.

23 

23

46 

53

42

39 

37 

35 

30 

26

28 

28 

24 

21 

14

12 

11 

12 

14 

11

12 

14 

12 

11 

9.8

11 

15 

10 

10 

9.2 

8.6

Apr.

165 

165

95 

374 

668

4,720 

1,720 

703 

395 

763

3,080 

2,190 

2,370 

10,000 

16,300

9,150 

7,430

6,430 

10,800 

4,760

3,200

2,000 

1,540 

1,290 

1,140

1,880 

1,250 

836 

2,910 

1,230

May.

932 

662 

590 4«8' 

459

346

205 

178

143 

143 

292 

782 

445

 21S 

137 

3,530

7,870 

8,360

10,500 

9,580 

7,190 

9,960 

10/000

5,310 

2,900 

1,810 

1,270

June.

5& 

87? 

1,528 

1.88& 

1,520

1,298

918 

488 

374 

5,130

16,000 

11,400 

7,740 

5,970 

5,330

4,890 

3.620 

3,150 

2,410 

1,820

1,390 

1,350. 

1,320. 

1,300 

1,370

1,260 

1,450 

1,310

1,270 

1,250

-July.

1,230

:. "" m181

W9 

86 

61 

6 

162,

243

181. 

146 

445 

320

361 

265 

172 

95 

66

152 

344 

246 

185 

146

143 

116 

86 

59 

32 

18

Aagv"

5 11

a2

7.2 

,6,2 

4.2

2,5 

2.0 

1.4

.8 

.8

.9 

,9, 

1.0 

.? 

.6

.1

.5 

.1 

.1 

.0

.0

.5 

3.4 

1.5

 7.6.

6.4'

3.8 

4.8 

-3.7 

2.2 

1.1

Sept.

1 1

t

6 

6 2

1L700 

I? 400 

11^00

6,650 

4,870

3,470 

2,370 

1.730 . 

l'330 

1,080

 884 

732 

606 

623 

1,100

552 

918 

836 

2,750 

3,290

3,690 

2,740

1,610 

953 

697

. NOTE. Discharge determin»d by shifting-control method Oct. 1 to Nov. 16. No flow Aug. 20-21. No 

record Aug. 9-12; discharge 'interpolated. Discharge on Oct. 6 interpolated as observe* gage height i? 

believed to be in error.

Monthly discharge of Brazos River at Waco, Tex., for the year ending Sept. SO, 1918.

Month.

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

Nevejnber. ...............'..,.. '........................

Sficember. ................................ .

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

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

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

May

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

The year. ........... *,.... .........................

Discharge in second-feet.

Maximum.

1,420 

640 

349 

178 

39 

53 

16,300 

10,500 

16,000 

1,230 

11 

13,400

16,000

Minimum.

9.6 

9.8 

13 

18 

14 

8.6 

95 

137 

374 

6.0 

.0 

.4

.0

Mean.

175 

41.7 

52.3 

44.2 

26.4 

21 

3,320 

2,730 

3,000 

228 

2.72 

2,680

1,020

Run-Off 

in acrefeet..

10,800 

2,480 

3,220 

2,720 

1,470 

1,290 

198,000 

168,000 

179,000 

14,000 

167 

159,000

, 740,000

69972 22 WOT 478 2
14 SURFACE WATER SUPPLY, 1&18, FABT VIH.

BRAZOS EIVER HEAR C6LL1OE STATIOW, TEX.

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

above mouth of Navasota River.

DRAINAGE ABEA. 27,800 square miles.

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

GAGE. Vertical staff in two sections on fourth pier from right bank. Section 0 to 14 

feet is attached to sheet piling at base of pier. Section 14 to 52 feet is painted on 

pier; read by Will Reaves.

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

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

defined control. Banks high and free from vegetation. Right bank subject to 

Overflow at extremely high stages (about 40 feet).

EXTREMES OF DISCHARGE. Maximum stage recorded during period, 24.50 feet at 

1.30 p. m., April 16 (discharge, 31,700 second-feet); minimum stage, 3.75 feet 

September 4 (discharge, 92 second-feet).

ICE. None reported during period.

DIVERSION .- The second report of the State Board of Water Engineers shows a fe# 

small power-and irrigation plants above the station, but these do not greatly 

affect the flow.

REGULATION. None at present. A lock and -dam under construction by $te Wat 

Department near fort Sullivan, about 25 miles upstream, may eventually regffl-. 

late the flow to a slight extent. . V

ACCURACY. Stage-discharge relation fairly permanent. Rating eurv^is well defined. 

Gage read to half-tenths twice daily. Very little diurnal fluctuation. Discharge obtained by applying mean daily gage height to rating table and by 

shifting-control method. Records fair.

Discharge measurements of Brazos River near College Station, fex., durwg.the year end'

ing Sept. SO, 1918.

Date.

Feb. 23

Mar. 20

9

9

10

10

Made by 

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

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

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

.....dcr.... ..............

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

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

Gage 

height.

Feet. 

4.35

4.00

13.49

10.27

9.33

7.43

7.09

Discharge.

Sec.-ft. 

201

134

9.150

4,780

3,570

1,920

1,690

Date.

Apr. 11

17

18

May 4

June 22

Aug. 15

Made by 

A. K. Gowans.. ........

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

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

E. P. Congdon... ......

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

A

Feet. 

6.36

22.71

21.93

7,22

7.81

3.W

Discharge.

Sec.-ft. 

1.190

27.6QD

26,000

1>810

23P

m ,; .-'>$.
BBAZOS ti&SBSt.

Daily (Kttharge, ifi fmnd-f&t, , of Ttrafos Riv& ftem* College

'ending Sept. SO, 1918.

for the year

Day.

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

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

a................. -.. .................

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

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

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

7..... .. ;......... ...................

....................................

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

tl..i.',t. .............................

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

19. .

U............ ........................

15

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

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

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

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

2D.... . ... . ... .. . ..

as.... «|... . .........>..,................ .>. ..... . . .....

s:::::::::::::::::::::::::::::;::::::

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

M............. .......................

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

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

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

30...............:....................

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

Feb.

202

221

195

170

195

154

Mar.

16ft

299

m

2?1

905

260

210

195

186

170

170

170

160

130

143

14A

130

140

130

134

130

130

140

130

130

130

122

140

140

123

122

Apr.

127

140

m

239

840

S2g

2,340

9,290

4,290

1,840

1,110

708

1-500

3.100

13,700

25,800

27,700

 25,600

20,600

17,900

13,500

6,490

4,150

3 180

2,660

3,070

3,850

2,870

2,680

2,800

May.

4,«70

M2d

2,210

1,760

2*210

2, 110'

1 520

1,760 i;s4o

1,060

ott;

SI

70*

649

776

676

952

814

666

8,200

5,530

 5,920 7,*Je

5,790

5,490

9,810

7720

5,640

3,646

2.650

2,080

June.

1,730

1,410 1,550

1,640

».m

4,570

3,080

2,950

3,240

3,470

9 77A

13,400

.11,900

7,400

5,960

4,800

4,860

.4,240

3,570

. 3,200

2,710

2,410

2230

1,730 l'390-

1,200

997

885

945

1,220

 My,

86t,

 74*

849

S21

781

764

no.

514

448

380

269 260'

340

360

305

372

487

460r

420

352

287

257

233

242

287

263

236

266

215

 ,A«t- ' 

202

186

HP

166

ISO

140

140

140

fcffl

122

118,

1|5 its

115

118

118.

122

l'30

127

115

115

115

108

115

122

132

134

134

146

127

Sept.-

 "- ' 132

111

92i

13u

122

1,560

10100

11,400

7,050

km%m

2,020

1,700 i,m

i'i$j '933

»' 837

1,600

1 210

1,020

1,270

1,920

2,920

3,300

^550

1,790

NOTE. discharge determined by shifting-control method June 25 to July 30 and Sept. 7-80.

JflfritKly discharge of Bnatw River near otte</e Station, ?feM for the year mcKng

Sept: SO, 1918.

Month.

February 23-28..................«............. ..........

Iferch..... ..............................................

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

M»Y..

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

Discharge" in second-feet.

Maximum.

221 

305

27,700 

9,810 

13,400 

921 

202 

11,400

Minimum.

154 

122 

122 

649 

885 

215 

108 

92

Mean.

190 

105 

6,720 

3,190 

3,540 

435 

133 

2,390

,

Run-off in 

acre-feet.

2,269 

10,100 

400,000 

196,000 

211,000 

. 26,700 

8,189 

142,000

996>QOO
16 SURFACE WATER SUPPLY, 1918, PART VIII.

CLEAR FORE OF BRAZOS RIVER HEAR ELIASVTLLE, TEX.

LOCATION. At new highway suspension bridge 2J 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.

RECORDS AVAILABLE. November 12, 1915, to September 30, 1918.

GAGE. Chain gage attached to downstream side of bridge; read by Gilmer Vaugha.

DISCHARGE MEASUREMENTS. Made from bridge or by wading.

CHANNEL AND CONTROL. Banks high, wooded; composed of clay and gravel, not 

subject to overflow. Bed composed of sand and gravel; free from vegetationChannel straight above and below station. Control for the low and medium 

stages is a shoal about 600 feet below station; shifts during changing stages.

EXTREMES OF DISCHARGE. Maximum stage recorded, 20.9 feet at 12.30 p. m., May 18 

(discharge, 8,240 second-feet); no flow October 14 to April 4 and August 6 to 

Septembers.

1916-1918: Maximum stage recorded, May 18, 1918; no flow for extended 

periods.

ICE. None reported during year.

DIVERSIONS. Much of the land now irrigated above the station is in Jones and 

Taylor counties; two diversions are made for irrigation between station an4 

mouth. Quantity of water diverted unknown. The second report of the State 

Board of Water Engineers shows the Sweetwater Light & Power Co. has declared 

a storage of 216 acre-feet, and Abilene Water Co. a continuous use of 1.5 seconifeet of water, in the headwater regions.

REGULATION. No large reservoirs above or below station. The operation of & 

water-power grist mill 5 miles upstream produces some effect at the station.

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

defined below 9,000 second-feet. Gage read to hundredths twice daily; observer's work not entirely satisfactory; mean daily gage height may not be a true 

index of daily flow because of regulation. Daily discharge ascertained by applying mean daily gage height to rating table, and by indirect method for shifting 

control. Records fair.

Discharge measurements ojGlear Fork of Brazos River near Eliasviile, Tex., during the

year ending Sept. SO, 1918.

Date.

Oct. 18

Nov. 27

Dec. 28

Mar. 19

May 18

19

19

20

Made by 

X K. Gowans..........

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

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

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

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

Gage 

height.

Feet.

1 60

19 31

17 79

15.91

Discharge.

Sec.-Jt. 

0.0

.0

.0

.0

8,200

7,260

6,300

5.250

Date.

May 20

21

22

22

22

22 Sept. 7

Made by 

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

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

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

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

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

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

height.

Fett. 

16.30

18.05

10.47

8.60

7.45

6.41

5.73

Discharge.

See,-/*. &,m e^no

2520

1,760

1,420

1,010

873
BBAZOS BIVBB BASIIf,

Daily discharge, in second-feet, of Clear Fork of Brazos River near MliasvUk, 2Tea?.,/or 

. . the year ending Sept, SO, 1918. , .. , <

Days.

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

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

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

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

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

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

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

0

£::t:;::::::::::::::::::::::::::::::::::::::: w... ;.........................................

it.......... ...................................

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

13............................................. t4......;...................,..................

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

ift.............................................

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

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

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

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

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

22,

23 .

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

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

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

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

28... .......

SO

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

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

Oet,

2.2

1 S

1.8

1.4

1.4

1.1

I.I

.5

.5

.4

.3

.2

.2

.1

.1

Apr.

52

4,850

565

1,280

806

OQC

67

52

3,510

3,070

*,660

2,260

405

480

225

14

48

35

27

20

13

8.4

6.0

6.0

3.5

4.8

Sfey,,

6.0

10 ' 6.4

1.2

^5

.6

.6

2.0

3.5

1.4

.3

.3

.3

.2

.0

3,210

Q ftftA

6,660

5,430

ft don '

3,360

365

155

155

155 .

155

72

35 .

31

24

JUBjfe.

17

53

' 232

585

405

405

1 990

5.' 900

4,260

3,160

2,300

2.300

1,680

348

86

72

62

62

52

W

.5

3.5

10

10

10

10

6.0

6.0

,020

July,

225

141

-.. '86

86

43

37

20

20

15

11

11

118

278

155

260

190

72

31

20

24

27

20

20

20

3.5

8.0

14

14

2.3

.4

.9

-*«*.;

1.7

2. 3

2.^

1.4'.4

' 

1

( ,

'

Sept.

;*

i,soo §,-9&r

1,200

; 585'

260

208

133

86

72

52

^i

24

12

10

10

10

2,530

260

62

39

31

. 17

11

6.4

3.8

3.5

NOTE. Discharge determined toy shifting-control metbod, Oct. 1-10; no flow on days for which discharge is not given.

Monthly discharge of Clear Pork of Brazos River near Eliasville, Tez., for the yesar 

' ending Sept. SO, 1918.

Month.

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

March.................................................... April..................................................... l£y........... ...........................................

July. August.. .. .... .............. ...........

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

Discharge in second-feet.

Maximum.

2.2 

.0 

.0 

.0 

.0 

.0 

4,850 

8.080 

5,900 

278 

2.9 

5,930

8,060

Minimum.

0.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0 

.5 

.4 

.0 

.0

.0

Mean.

0.42 

.00 

.00 

.00 

.00 

.00 726 

1.110 

835 

63.6 

.28 

436

264

Run-off 

to

acre-feet.

25.8 

.0 

. .0 

.0 

.0 

.0 

43,200 

68,200 

49,700 3,»ir

' 17.2 

26,900

191,000
18 SUBFACE 8WELY, 1918, PAET VIII.

RIVER AT 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, about 6 miles 

below mouth of San Gabriel Kiver, and 25 miles above confluence with Brazos 

River.

DRAINAGE AEEA. 7,010 square miles.

RECORDS AVAILABLE. November 1, 1916, to September 30, 1918.

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

short distance below home of pump man; read by T. A. Crawford.

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

CHANNEL AND CONTROL. Bed composed of rock, gravel, and sand; free from vegetation and permanent during normal flow. Banks are clay and gravel; medium 

height; wooded; subject to overflow during extreme stages. Control for low and 

medium stages is rock and gravel shoal 100 feet below gage; shifts during flood 

stages. At stage of about 18 feet (discharge, 6,530 second-feet) water enters an 

old channel 1 mile above gage, and the flow through this channel is diverted 

around the station and enters the river again below the gage. All records above 

6,500 second-feet do not include the flow in this flood channel.

EXTREMES OF DISCHARGE. Maximum stage recorded, 30.40 feet at 6 p. m; April 17 

(discharge, 13,300 second-feet); minimum stage, 0.78 foot at 7 a. m. September 

3, 5, and 7 (discharge, 2.6 second-feet). 

1916-1918: Extremes occurred in 1918.

ICE. None reported during year.

DIVERSIONS. Small areas are irrigated in the upper drainage basin, but diversionii 

have little effect on flow. Second report of the State Board of Water Engineers 

shows Cameron Power & Light Co. has continuous use of 5 second-feet with a 

declared consumption of 3,650 acre-feet yearly for waterworks, light, and power 

in Cameron. During low water this has an appreciable effect upon flow at station. 

At stage of 18 feet some water is diverted around the station through an old channel 

of the river.

REGULATION. Apparently none.

ACCURACY. Stage-discharge relation did not change during the year. Rating curve 

well defined below 13,000 second-feet; gage read to hundredths twice daily and 

oftener during floods. Daily discharge ascertained by applying mean daily gage 

height to rating table. Records good.

measurements of Little River at Cameron, Tex., during the year ending Sept. 

SO, 1918.

Date.

Nov. 9

Feb. 6

7

Mar. 19

Apr. 15

16

Made by 

E. P. Congdon. ........

G. A. Gray.............

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

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

Gage 

height.

fleet. Leo

1.19

1.20

1.12

22.41

28.08

Discharge.

Sec.-ft. 

13.0

34.3

30.6

25.6

8,630

"12,400

Date.

Apr. 19

19

20

Aug. 14

Made by 

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

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

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

OrEfcSj©

Feet. 

13.23

11.08

14.66

92

»!* '

chatgfe.

aeejt.

3* 850 t£ ooo

51,1

«7

urtece velocity observed by floats and coefficient of 0.75 used to reduce to mean velocity.
Do% discharge, in second-feet,, of Little River at C&swon, T«c.,/or the mwr ending Sept.

* $0,191$;-

 Oet. Df». Jan. Eeb. Mar. Apr. May, Ailg.

i*«

15..

19.

20.

22.

n.

29..

27..

28..

31.

209

140

66

51

43

37

84

32

33

34

38

30

m

553

612

8

112

76

55

27

142

534

115

627

2,140

6,060

2,300

565

302

214

134

115

2,140

8,680

12,100

13,200

10,900

4,940

4,440

1,760

553

357

211

86$

1,670

391

559

1,140

918

447

550 407' 

373 

842 

264

68

244

118

112

110

106

106

148

173

1,670

2,320

2,200

150

146

134

142

1,590 

£«°?

m

'«74

565

-500

753

627

550.

429

267

4SS 

.522 228

138

102

87

77

m

103

127

8.6

6.6

5.4 

4.6 

4.2 

5.0

42

19

31

25

12

11

8.6 

7.0

31

314

102

204

214 

194 

289 

255- 

534.

NOTE. See "C!hannel and cpatr.ol" In station description. ,

discharge ofM&U River at Oameron, Tex,., for the'year ending Sept. $?, 1918.

Month.

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

fiSSS5:...:"":iir..........:...M.:.:.:.;.:.:.:.i.:.:

May '

June July. ... . ............................................

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

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

Discharge in second-feet.

Maximum.

30 

736 

84 

54 

612 

112

2L7&) 

1«0 

13 

534

13,200

Minimum.

13 

13 

26 

30 

32 

26 

27 

§8 

69 

12 

5.8 

42

42

Mean.

19.7 

S&4 30.0

38.1 

83.7 

37.2 

2,600 

472 

887 

41; 5 

8.32 

86.3

354

Run-off uj 

&cr«-ftet.

#B,

s 1,880 

2,340 

4,650

4^09Q -i-^S8

512

5,140

256,000

NOTE. See "Channel and control" in station description
20 SURFACE WATEB SUPPLY, 1918, PART VIII.

COLORADO RIVER BASIN. 

COLORADO RIVER HEAR 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 2J miles south of Bronte, oke County.

DRAINAGES ABBA. 5,550 square miles. :

RECORDS AVAILABLE, -September 19, 1915, to September 30, 1918.

GAGE. Chain attached to, downstream side of bridge near left bank; read by 1?. G. 

Owen. A vertical staff gage attached to left bank of railroad bridge 400 feet above 

present site and referred to same ^datum was used prior to October 29, 1915.

DISCHARGE MEASUREMENT. Made from downstream side of bridge or by wading;"

CHANNEL AND CONTROL. Bed composed of hardpan mixed with gravel; shifting; 

channel straight about 500 feet above and below station. Eight 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.

EXTREMES OF DISCHARGE. Maximum,stage recorded during year, 9.70 feet at 7 a. m.-,'

May 17 (discharge not determined); no flow during several periods throughout;

the year. ' ,,

1915-1918: Maximum stage recorded 15.0 feet, 2 a. m., September 25, 1916,

and 1.30 p. m., October 15, 1916 (discharge not determined).

ICE. Some ice reported in January.

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

counties and for the city of Robert Lee. The second report of the State Board 

of Water Engineers records a small storage project at Robert Lee, but this storage 

will not affect the flow. '

R EGULATION. None.

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

defined below 400 second-feet; extended above 450 second-feet, and subject to 

error. Gage read to hundredths twice daily. Daily discharge determined by 

shifting-control method or by applying mean daily gage height to rating table. 

Records poor.

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

Sept. SO, 1918.

Date.

Oct. 31

Dec. 18

Jan. 29

Feb. 26

Made by 

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

E. P. Congdon. . .......

Gage

height.

Feet.

L58.

1.60

1.60

1.62

Discharge.

Sa.-ft. o0.1

o.l

o.l

o.2

Date,

May 26

July 18

Aug. 7

Made by Gage 

height.'

Feet. 

1.77

1.76

IHsctoarge.

8ee*ft,

15L6

.1

o Estimated.
COLQEADO RIVER BASIN.

Daily discharge, in s&ond-foel, o/ Colorado River near Bronte, Tex., for .the year ending

: - .<?«< = _ , - Sept. S0,l$18. ' ' ' l '":

Day.

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

2;:.....,..,...

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

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

5..:...........

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

7..,,..,.......

8.........:.... 9..............

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

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

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

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

IS..............

1C.............

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

18.............. 19;.... .........

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

21

22

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

24.... ......_..

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

26

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

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

29...........;..

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

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

Oct.

0.1

Nov.

0.1.

.1

.1

.1

.1

.1

.1.1-

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

..-. a

.1.1.1.1

-i.1.1.1.1

Dec.

0.1

.1

.1

.1

.1

.1

.1

.1

, .1

.1

.1

.1

 .1

.1

.1

.1

.1

.1

.1

.1

v.l {

.1.1.1.1 ,.1.1

Jan.

0.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

Feb.

0.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

Mar.

0.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

;1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

7.5.

.2

.1

.1

Apr.

0.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

May .

0.1

.1

.1

33

49

21

7.5

7.5

6.6

5.6

4.8

4.1

4.1 

4.1

4.1

4.5

1,430

203

581

54

28

17

15

10

a. 6

15

6.6

6.6.

4.8

4.8

4.8

June.

4.8

4.8

940

572

429

389 >

292

526

1,370 ,

1,800

541

262

WO

23

8.0

' 7.0

4.S

4.5

2.8

2.6

1.4

1.2

1.0

.7

.5

.3

.2

18

1.8

1.6

July.

0.3

.3

.3

107

41

14

3.4

.3

Aug.

"*

1.4

Sept.

1,350

367

547

367

290

26

, 28

20

9.5 

2.2

1.4

3.4

1.4

NOTE. Discharge determined by shifting-control method May 6 to Jtiii6 2 and June 8 to Sept. 30. No 

flew OR days tor which discharge is-not given.

Monthly discharge of Coloraefo River near Bronte, Tfx.,for the -year ending Sept. 30,1918.

.Month.

A/»£rtKar

March. .. April - * May..

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

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

Discharge in second- feet.

Maximum.

0.1 

.1 

.1 

.1 

.1 

7.5 

.1 

1,430 

1,800 

107 

1.4 

1,350

1,800

Minimum.

0.0 

.1 

.1 

.1 

.1 

.1 

.1 

.1 

.2 

- .0 

.0 

.0

.0

Mean.

0.0 

»1 

.1 

.1 

.1 

.34 

.1 

82 

243 

537 

.05 

119

37.3

Run-Off 

in . 

acre-feet.

0.0 

.6.0 

6,1 

6,1 

5.6 

2t. 9 

6.0 

5,040 

14,500 

330 

3.1 

7,080

27,000
SUBFACE WATEE SUPPLY, 1018, PA&T VIII.

COLORADO RIVER AT BALLUSTOER, TEX.

LOCATION. At Hutchins Avenue highway bridge, 800 feet below {Juifj; Colorado .& 

Santa Fe Railway bridge in Ballinger, Runnels County, and 1 mile above mouth 

of Elm Creek.

DRAINAGE AREA. 6,460 square miles (revised).

RECORDS AVAILABLE. December 11, 1915, to September 30, 1918. Records of 

stage obtained by the 'United States Weather Bureau since luly 1, 1903; current-meter measurements began May 29, 1915.

GAGE. Chain gage attached to downstream handrail of bridge; read by A. J. Voelfeel.

DISCHARGE MEASUREMENTS. Made from downstream side olbridge 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; slightly shifting. Control is shoal about 1,000 feet below 

gage; subject to change. ,

ICE. Small amount reported in December.

EXTREMES op DISCHARGE. Maximum stage recorded during year, 1-2.15 feet at 

7.30 a. m. June 4 (discharge not determined). No flow during several period* 

throughout the year. 

1916-1918: Maximum stage recorded in 1918; no flow during several periods.

DIVERSIONS. During low stages a large part of the flow is diverted above th,e station 

by gravity or pumping. The second report of the State Board of Water Engineer 

shows 3,307 acres in Runnels County, above the station, declared irrigated with 

6,614 acre-feet of water; also filings for waterworks by cities of Ballinger anft 

Winters for continuous use of 1 and 4 second-feet, respectively.

REGULATION. None.

ACCURACY. Stage-discharge relation not permanent. Changes materially affect 

low-water rating but probably do not seriously affect that for high and medium, 

stages. Gage read to hundredths twice daily. Daily discharge ascertained by 

applying mean daily gage height to rating curve and by shifting-control method, 

Records good except during low stages, when they may oe considerably in error;

Discharge measurements of Colorado River at BalHnger, Tex., during the year ending

Sept. SO, 1918.

Date.

Oct. 29

Dec. 17 

Jan. 30

Feb. 25

Apr. 26

Made by 

...,,do. ................ 

R.JiHank.. ..........

E. P. Congdon. ........

R. T. Hank.... ........

height.

Feet. 

0.50

.64 

.61

.52

Discharge.

Sec.-ft. «0.1

a.3

o.5

o.3

.0

Date.

May 18

24 

July 19

Made by 

.....do. .7!.... ......... 

R. T.Hatik.. ..........

E. P. Congdon.........

».

Feet, 

2.09

1.02

.70

Dis- v"i 

charge. ;' ,- ^

-4?!Srf$*.' *-'' " '-

' ' 1ft I '''" '*?

, ',11-.^

 ) V*- ° ' * "

Estimated.
BASIN.

Da/tty discharge, in ae&mdffeMt ($' Go3xttodo River, 9t BoMmff&r, Te$., for the yefo ending

Sept. SO, 1918.

Day.

1,. ...............

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

a.................

4................. *,....... .........

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

*,...... ........ ID.................

a

..,............ 1..

.................

IS.. ...............

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

I*..-..*. ...........

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

»« ..;.... ........

ft.................

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

20 ... . ...

S ...... ........... ..............:..

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

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

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

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

S7.. ...............

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

*.. ...............

30................. H.. ...............

Oct.

1.4

.5

'.1

.1

.1

.1

.0

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

.1

Nov.

0.5

.5

9

.9

a

1.0

1.2

1.2

1.2

1.2

1.6

1.6

1.6

1.6

2.0

2.0

1.6

2.0

1,2

1.2

i *>

1.2

1.2

.9

1.2

1.2

1.2

1.2.

.9

Dec.

0.5

.5

.5

1.0

.7

.5

.5

.5

.1

.1

.1

.1

.1

.1

.3

.3

.3

.5

.7

.7

.7

.7

.5

.1

.1

.1

.1

.1

,1

.1

Jan.

0.9

.9

9

n

9

.9

.9

9

.9

.9

1.2

1.2

1.2

.5

.5

.5

.3

' .7

.9

9

.9

:9

.5

.9

.5

.5

Feb.

.7

.7

.5

.1

.1

.3

.1

.1

.1

.5

.5

.5

.1

.1

.1

.3

1 9

1.0

.5

.5

.5

.£

.3

.1

.1

Mar.

0.1

10

3.6

2.8

2.0

1.6

.5

.1

.1

May.

186

99

20

21

, 4.0

.3

3,150

1 13A

659

434

186

83

55

 M

24

15

11

7.0

5.8

A A

June.

2,2

1,680

603

6,300

588

477

404

203

3*330 %m

1.760

1,090

416. ton

107

68

45

30

20

14

7,6

3.6

3.6

3,0

12

My,.

4.6

.2

.4

19

6.4

1.2

.5

1.9

Aug.

1,150

92

15

18

37

14

3 A

Sept.

5.8iO

1,020

890

89?

750

512

215

118

65

41

26

20

12

8.8

7.6

5.8

107

16

7.6

4.6

2.2

.5

.4

.3

.1

,2

.1

NOTE. Discharge, Oc,t. 1-5, and Nov. 13 to Feb. 18, determined by shifting-control method; June 12, 

interpolated. No flow on days tor which discharge is not giTen.

Monthly discharge of Colorado River at Ballinger, Tex.,for the year ending Sept. SO, 1918.

: Mflntk

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

November*. .............................................

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

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

April.... ................................................. May . .

Jt#jr... ..................................................

Discharge in second-feet.

Maximum.

1.4

2.0 

1.0 

1.2 

1.2 

10 

.0 

3,150 

6,300 

19 

1,150 

5,880

6,300

Minimum.

0.0 

.5 

.1 

.3 

.1 

.0 

.0 

.0 

.0 

.0 

.0 

.0

.0

Mean.

0.18 

1.23 

.36 

.83 

.38 

.70 -.0 

224 

765 

1.10 

42.9 

354

115

Bun-off 

in 

acre-feet.

11.1 

73.2 

22.1 

51.0 

21.1 

43.0 

.0 

13,800 

45,600 

67.6 

2,640 

21,100

88,300
24 SURFACE WAtEE SUPPLY, 1918, PAET VIIIv

COLORADO RIVER HEAR CHAD^ICK, 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 

county line between San Saba and Lampasas counties, and 2$ miles below 

mouth of San Saba River. \

DRAINAGE AREA. 26,400 square miles.

RECORDS AVAILABLE. October 21,1915, to September 30,1918.

GAGE. Inclined staff attached to rock ledge on left bank abou£ 75 feet upstream 

from railway bridge; high-water section is painted on left bridge pier; a vertical 

staff on right bank directly opposite inclined gage is used during low 

gages referred to same datum; read by A. G. Walker. -

DISCHARGE MEASUREMENTS. Made from cable 400 feet below gage or by wading.'

CHANNEL AND CONTROL. Bed composed of rock and gravel; not likely to shift. 

Channel straight above and below station for 1,000 feet- Left bank high, rocky,, 

wooded, and not subject to overflow; right bank clay and gravel, medium in 

height, wooded, and subject to overflow during extreme stages. Position of control not known, but current-meter measurements indicate that it is practically 

permanent.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 22.0 feet at 11 a. m. 

June 4 (discharge, 22,500 second-feet); minimum stage, 0.16 foot August 22 and 

23 (discharge, 1.5 second-feet). 

1916-1918: Maximum and minimum stages occurred in 1918.

ICE. None reported during year.

DIVERSIONS. Numerous tracts ranging in size from 5 to 1,500 acres are irrigated by 

diversions from the main stream and tributaries. A large part of the irrigated 

area is Runnels, Brown, and Mills counties and along Concho and San Saba riversSeveral small dams have been constructed in the drainage basin above station;. 

Chadwick dam, half a mile above, creates a small pond and diverts to a water 

wheel not now in use.

REGULATION. None.

ACCURACY. Stage-discharge relation practically permanent. Slight changes occur 

during floods. Rating curve well defined between 10 and 3,000 second-feet, 

and fairly well defined between 3,500 and 14,000 second-feet. Extensions of 

curve below 10 second-feet and above 14,000 second-feet subject to error. Gageread to hundredths once daily, but observations are doubtful. Daily discharge 

ascertained by applying gage height to rating table, or by shifting-control method* 

Records fair.

Discharge measurements of Colorado River near Chadwick, Tex., during the year ending'

Sept. 30, 1918.

Date.

Oct. 16

Dee. 8

Feb. 27

May 20

Made by- Gage 

height.

Feet. 

0.54

.70

.76

13.52

Discharge.

Sec.-ft. 

37.3

63.1

57.1

11,100

Date.

May 21

July 13

Ana 0

29

Made by- Gage height.

feet. 

5.61

.38

.34

.22

Discharge..

See.-/t. 

2.510

18.CT

4.0

o2.&

a Estimated.
COLORADO BITER BASOJ. 25

Daily discharge, in seamd-feet, «/ Colorado River near Chadwick, Tex.,for the year^ndi

Sept. 30, 1918. ^

Day.

1.. ............ '»:.............

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

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

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

...............

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

S... ...........

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

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

U... ...........

1?..............

J3 .

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

15.............. ^

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

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

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

19:.............

1»..... .........

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

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

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

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

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

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

2f..............

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

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

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

81... ...........

! det. 

78

70

61

55

50

43

41

39

36

43

42

40

39

38

38

38

35

35

35

35

35

35

36

38

39

35

38

35

35

35

36,

Nov.

.39

/39

39

39

39

39

38 ' 38

36

36

36

36

30

36

36

38

39

40

40

39

38

53

78

74

45

42

42

89

181

280

Dec.

213

150

122

122

116

111

98

87

54

39

48

46

46

42

42

42

42

42

40

40

40

40

41

41

42

43

43

43

51

60

55

Jan.

52

52

50

50

50

50

50

50

48

50

50

48

76

72

68

64

64

61

58

55

54

51

51

50

47

46

43

40

40

40

42

Feb.

42

40

40

42

41

41

41

39

39

39

39

41

41

38

35

35

35

38

40

40

40

36

36

36

36

36

36

39

Mar.

36

36

36

36

34

34

34

34

34

34

34

36

34

32

31

30

29

26

26

25

23

21

20

19

19

20

20

23

28

28

26

Apr.

26

26

25

21

21

8,040

640

203

100

68

51

48

338

18,000

8,150

4.360

566

422

283

216

153

126

100

76

566

100

72

68

66

62

May.

62

62

60

56

84

111

138

166

194

222

240

249

260

263

129

111

102

1,270

9,240

13,000

2.420

1,040

§20

680

494

360

297

229

165

US

72

June.

68

68

68

22,408

10,400

3,510

1,220

602

2,730

580

3,710

4,230

2,780

1,480

880

1,600

880

720

566 422-

352

494

346

216

100

68

62

39

38

37

July.

36

34

34

33

30

28

26

26

26

46

20

19

15

46

83

107

104

96

45

30

26

22

IS

16

14

14

7.0

3.2

2.6

2.6

2.4

At^-j

2-<M its

2.0

1.8

9,4

10

9.4

8.2

4.0

4,0

3.2

2.8

3.0

2.6

2.6

2.4'

2.0

1.8

1.6

1.6

1.7

1.5

1.5

1.8

2.0

2.4

2.8

213

363

255

147

,l3ept.

:, 37t> \ m

85

67

61

1,920

1.250

1.130

820

780

700

613

440

293

286

168

138

98

85

1,580

4,260

3.660

3060

2,460

1,860

800

200

100

89

61

J NOTE. No gage-height record Apr. 5,14.16, 23, May 1, 5-11, 30, June 2-3, 29-30, Sept. 22-28; discharge 

Interpolated. Discharge determined by shifting-control method, Oct* 6 to Jan. 15 ana Jan. 21 to Aug. 27.

Monthly dischasrgeof Colorado River near Chadwick, Tex.,for the year ending Sept. 30,1918.

Month.

 t - October. ...........,............'.........................

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

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

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

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

Joly........ .............................................

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

Discharge in second-feet.

Maximum.

78 

280 

213 

76 

42 

36 

 18,000 

13.000 

22,400 

107 

363 

4,260

22,400

Minimum.

35 

36 

39 

40 

35 

19 

21 

56 

37 

2.4 

1.5 

61

1.5

Mean.

41.5 

56.2 

65.8 

52.3 

38.6 

29.0 

1,430 

1,060 

2,020 

31.0 

34,5 

91S

: 478

Run-off 

in acrefeet.

.2,530 

3,340 

4,050 

3,220 

2 140 

1,780 

85,100 

65,200 

120,000 

1,910 

2,120 

54,600

346,000
26 SURFACE WATEB SUPPLY, ItttS, PABT VHI.

COLORADO RIVER AT MABBXJ! FALtS, TBX,

LOCATION. At steel highway bridge one-fourth mile south of Mar>l© Falls, Burnet 

County, 10 miles below mouth of Sandy Creek, 16 miles below mouth of LlanoRiver, and 23 miles above mouth of Pedernales Eiver.

DRAINAGE ABBA. 32,200 square miles.

RECORDS AYAH-ABLE. October 1, 1916, to September 30, \1918. MisceUaaeow* 

discharge measurements were made in 1902. Records of stage have been obtained 

by the United States Weather Bureau since January 1, 1908.

GAGE. Vertical staff in several sections painted on piers of bridge; read by 

M. M. Berry. Prior to December 12, 1917, weight and tape gage of Mott typeon upstream side of bridge was used.

DISCHARGE MEASUREMENTS. Made from bridge or by wading.

CHANNEL AND CONTROL. Bed composed of solid rock. Banks, rock, gravel, and 

clay; wooded; not subject to overflow. Rapids just below gage serve a* 

permanent control for low and medium stages.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 15.0 feet at 

5.30 p. m., April 15 (discharge, 57,400 second-feet); no flow August 11-25.

1900-1918: Maximum stage, 23.9 feet April 7, 1900 (discharge not determined); 

no flow in August, 1918.

ICB. None reported during year.

DIVERSIONS. Several large projects have been proposed in the drainage basin abov* 

station, but none have been developed. Water is diverted for irrigating small 

tracts adjacent to the main river and tributaries. Most of the irrigated lafid 

lies along the Concho, San Saba, and Llano rivers. The second report of th« 

State Board of Water Engineers shows that the Llano Milling & Mining Co. ha* 

declared a continuous use of 833 second-feet for hydraulic pt>wer and waterworks,, 

and M. H. Reed an unstated quantity for water works for Marble Falls.

REGULATION. Flow is regulated to some extent by diversions for irrigation and; 

power immediately above station.

ACCURACY. Stage-discharge relation permanent. Rating curve well defined below 

50,000 second-feet. Gage read to hundredths twice daily. Mean Of two readlngl* 

daily may not be true mean because of operation of power plant just above gage. 

Daily discharge ascertained by applying mean daily gage height to rating table, 

October 1, 1916, to September 30, 1918. Records good.

Records of daily and monthly discharge for 1917, based on revised rating curve, 

are published herewith, and supersede those previously published.

Discharge measurements of Colorado River at Marbk Falls, Tex., during the year

Sept. SO, 1918.

Date.

Oct. 11

Nov. 10 

Dec. 12 

14 

Feb. 21 

Apr. 15

15

Made by 

E.P. Congdon...... 

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

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

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

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

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

Gage 

height.

Feet. 

0.80

.42 

1.05 

.98 

1.20 

13.01

14.50

Discharge.

Sec.-ft. 

116

65.6 

134 

109 

152

<*44 800

a65,'800

Date.

Apr. 16

16 

17 

July 25 

Aug. 11

11

Made by 

E.P. Congdon.......

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

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

McCashin and Gowans 

McCashin and Kinni-

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

Gage 

height.

Feet. 

8.27

7.3& °:%

-1.10

- .10

Di»

charge.

8«l,-ft> 

a23,000

<*14,eOO 

olO,100 

68.2

.0

3.0

a Surface velocity observed and coefficient of 0.90 used to reduce to mean velocity. Subject to possib 1« 

error.
COLOBADO

ly discharge, in second-fed, of Colorado River at Mtffbk Falh, Te£.,/or ihe yean 

eni&ng Sept. SO, 1917, and 1918.

9ay.

1916-17. 1.... ..........

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

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

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

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

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

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

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

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

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

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

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

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

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

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

M . .

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

18. If::::::::::::::

20

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

^H.. ............

23-... ........ .^

St.. ...........

25. .

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

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

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

29

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

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

1917-18, 

I*... ..........

'2..^. ..........

*.-.. ...... .

4..,. ..........

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

6.............. 7..:...........

»...., ,.....,..

,10..............

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

12.. i... ........

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

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

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

M.. ............

17.............. is.:............

« ., ..........

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

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

m.. ............

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

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

...............

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

28*" '

2ft »::::r::::::::

«!.... ..........

Oct.

762

4SS

438

438

344

344

236

208

182

182

158

158

118

118

118

 268

268

344

4,740

17,100

s Q*ai

8,010 3,<i0:

1 300

t tftft

1,180

1 1M

848

618

J.Q9

344

118

182

158,

154

137

jig

118

lift

118

IfU

100

DA

58

ftS

66

56

AA

39

,37

37

37

37

39

S7

44

46

42

37

37

37

37

Nov.

268

208

208

182

182

158

158

n a

118

118

118 inn

137 \V7

1IR

lift

118 lie

,208

9/IR

1f.fl

1SR

158

158

158

31

26

37

39

46

46*

44

on

35

87

3707

40

51

68

71

oo

1,720

565

413

24^

182

141

118

.1S6

118

100

97

83

83

Dec.

182

169

182

182

208

236

236

236

236

208

208

182

182

ISO

182

182

182

182

182

182

182

182

tsst

182

182

1 R9

182

158

158

r -1S8 

104

388

Qft4

236

236

208

195

148

1CU

us

109

109 nfia

109

107

104

100

100

100

100

100

t(V\

100

100

100

100

100

100

100

100

Jan.

iia

182

182

182

182

182

,182

182

182 '-.158

158

158

158

 I CO

182

182

182

182

189

182

182 "208

208

208

208

208

208

208

182

182

100

109

100

100

100

100

100

100

100

114

118

118

137

 tftlf

137 ift1?

158 i*&

158

158

137

128

118

IKS

118

118

118

Feb.

182

182

182

168

158

158

158

208

208

1fi9

158

20$

208

208

208

208

208

208

208

one

208

208

208

208

182

182

182

182

lie

118

118

11R

118

us

us

118

128

137

137

137

T&7

1/Sft

13&

170

158

158

170 f 141

141

141

- 158

154

137

137

Mar.

1&9

9Aft

182

182

182

1S2

182

m

-

100

182

182

182

189

 too

182

182

182

182

1 <lfW

1 '848 060

552

438

344

208

208

208

208

208

182

137

137

137

141

158

158

MLR

1<W

137 nfi

lie

tin

118

11 Q

lift

100

100 '100

100

100

100

100

100

100

S3

S3

83

83

118

100

Apr.

158

158

158

137

137

ISO

158

182

208

208

208

208

182

182

1*7

117

137

137

118

118

118

118

1,300

762

492

438

438

438

438

438

100

104

100

100

2,020

688

1,180

1 ralft

1,200

565

336

252

236

5

*7Qfl

141,700

on Ann

8 sin

4460

2 <4*fl

1,570

1,240

725

 618

585

540

552

492

438

413

465

May.

438

344

344

344

344

344

344

304

304

208

208

208

304

268

2,230

1,306

1 060

688

438 Hi

344

438

11,200

5,620

3,010

1 USA

1,180

946

762

492

d38

312

312

268

268

268

268

230

632

762

605

353

Ken

1,180

1,570

848

585

398

29?

9,270

2680

1

TKA

i.aw

1,030

Sflfi

653

465

379

297 ste

Jane. i '

ass

344

5,930

3,010

4,740

6,890

3,010

2,800

1 300

762

492

492

304

268

182

158

158

118

118

S3

83

68

56

37

37

22

46

388

304

236

187

2,640

8,100

23,000

12,200

6,960

4 460

2' 760

1 R4ft

3 O1ft

2410

5,080

3 1 an

« ftfiO

*968

1 490 .iJsg

465

358

230

187

l/U

86

71

92«

, 398

324

July.

804

388

344

236

158

158

137

97

SO

76

39

37

23

37

12

23

83

118

148

62

137

23

29

51

39

56

23

12

33

118

109

137

118

109

83

80

68

68

62

62

56

54

Af>

37

26

21

>* ff

12

13she

9.0

10

163d

63

66

48

44

&

15

9.0

Aug.

100

62

58

15

15

22

28

15

29

18

62

46

4fi

44

31

23

22

18

12

21

12

42

252

242

m

298

195

148

9,0

4.0

4.0

4.0

4.0

4.0

4.0

4.0

. -, <

946

104

54

<tft

22

4.0

Sept.

118

344

492

653

14,900

8,410

f 3,930

2' 230

2370

968

848

948

L3TO

I! 306

' 562

522

43$

41$

268

203

. 158

128

118

148

4.0

141

203

286

1,500

1,576

916

605

1,570

1,300

-i l,«6

, 1 080

848

805

585

. 465

605 -252

230

208

208

1,330

3, IK)

1,460

1 300

1,080

725

831

398

275

Sfow.-^No flow past gage Aug. 7-8 find 11-25,1918; water was stored above gage.
28 SURFACE WATER SUPPLY, 1918, PART VIH.

Monthly discharge of Colorado River at Marble Falls, Tex.,for the years ending Sept. 50,

1917 and 1918.

Month.

1916-17. 

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

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

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

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

March..

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

May

July....

The year. ...................:......................

1917-18. 

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

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

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

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

17,100 

268 

236 

208 

208 

1,300 

- 1,300 

11,200 

6,890 

388 

252 

14,900

17,100

182 

1,720 

465 

158 

170 

158 

41,700 

12,800 

23,000 

137 

948 

3,180

41,700

Minimum.

118 

100 

158 

158 

158 

182 

118 

208 

22 

12 

12 

118

12

37

26 

100

100 

118 

83 

100 

230 

71 

9.0 

.0 

4.0

.0

Mean.

1,590 

159 

189 

182 

192 

298 

274 

1,180 

1,090 

103 

68.4 

1,730

588

75.4 

159 

147 

122 

138 

115 

3,320 

1.340 

2,910 

46.0 

39.1 

842

7fi6

Run-off 

in 

acre-feet.

97,800 

9,460 

11,600 

11 200 

lO.TOff 

18,300 

16,300 

72, 600 

64,900 

6,330 

4,210 

103,000

426,000

4,610 

9,460 

9,010 

7500 

7,660 

7,070 

198,009 

82408 

173006 

2,880 

2,400 

50,100

554, 006

COLORADO RIVER AT AUSTIN, TEX.

LOCATION. At Congress Avenue concrete viaduct in Austin, Travis County, hall a 

mile below Shoal Creek and above mouth of Waller Creek, 1 mile below mouth 

of Barton Creek, and 3$ miles below Austin dam. -

DRAINAGE ABEA. 34,200 square miles (revised).

RECORDS AVAILABLE. February 15, 1898, to December 31, 1911; October 1, 1914, to 

September 30,1918; September 1,1895, to April 7,1900, at Austin dam. Records 

of stage have been obtained by"United Btates Weather Bureau since July 1,1903.

GAGE. Stevens water-stage recorder installed April 26, 1918, on downstream side of 

pier of viaduct. Gage used February 15, 1898, to December 31, 1911, was a ver* 

tical staff attached to bathhouse on left bank of river 150 feet above Congress, 

Avenue Bridge; during the 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»Jurie 18, 1915, the vertical gage of United 

States Weather Bureau was read. June 18,1915, to April 25,191&, Dexter wateri 

stage recorder installed at end of viaduct was used. All gages referred to same 

datum. Record of depth of water on crest of dam, 3| miles above Austin, w*g 

kept August 13, 1895, to April 7, 1900.

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

highway bridge, 4 miles downstream.

CHANNEL AND CONTROL. Channel straight for 1,000 feet above and 500 feet below 

station. Eight bank of medium height, composed of clay and gravel, «Jean!» 

improved by c^ty, subject to overflow; left bank similar to right bank, but high, 

and nearly vestieal in places. Bed composed of rock and gravel, clean, shifts, 

Control is a gravel and rock shoal 500 feet below gager changes during high water 

and also during low water because of the removal of sand for municipal use.
COLORADO RIVEE BASIN. m

oy DISCHARGE. Maximum stage recorded during year, 16.0foel;»fe§.ai j»« 

April 16 (discharge, 51,500 second-feet); .minimum stage, -0.18 foot at G p. m. 

August 18 (discharge, 2.2 second-feet).

_. .,.. 1898-1911; 1914-1918: Maximum st^ge recorded, 33.5 feel April 7,, 190^, (die- 

. charge, 122,000 secoad-feet); minim m« stage, 0.50 foot December 10-17, 1914

, . (discharge, 2 second-feet).

I<5«. None during year. " , .

DIVERSIONS. ^-The second report of the State Board of Water Engineers S&QWB about 

3&,000 acres of land declared irrigated above the station, most of which. lies iifWe 

upper drainage of the main stream and its tributaries. The ^report also shews 

4,000 acre-feet annually, witfi a storage of 30,000 acre-feet declared by die city of 

Austin; 160 acre-feet manually by Winchell waterworks; 2$OQ«s&e-feet for wateiy 

works by Brownwpod; and an unknown quantity for Marble Falls waterworks;, 

all above station. ' ' -!. " 

REGULATION. Plow regulated by the Austin dam, about 3J miles upstream. * A|fc

4 p. m. January 24, gates at Austin dam were opened, and: reservoir was empty at

 6 p..m. Jaauary 27. Reservoir empty- until filled by bigl^ water, April 7. Water

,; released, for irrigation : irelow Columbus July 5 to July 24* when reservoir was

emptied; reservoir, was refilled September 5. '

ACCURACY. Stage-discharge relation not permanent. Numerous measurements made 

throughout year. Two rating curves were used during the year, one applicable 

from October 1 1» April 35, well defined between 20 and 88,900 second-feet, and 

the other for the remainder of the year well defined between 20 and 21,700 secondfeet. The change in ratings was caused by the Stevens' recorder being located 

at a different position, in the section, from the Dexter recorder. These curves 

are coincident below 2 second-feet. Mean daily gage height determined by inspecting gage-height graph. Gage heights from Dexter recorder obtained to 

half-tenths; from Stevens' recorder to hundred ths. Daily discharge ascertained 

by shifting-control method. Records good.

Discharge measurements of Colorado River at Austin, Tex,, during the year endmg Sept.

30, 1918.

Date. Made by Discharge. Date. Made by Discharge.

Oct. 8

NOT. 13 Dec. 1

18

Jan. 2 Feb. 4

27

**' £

28

Apr. 4 

18 

17

20 

. 4

21

Gowans and Congdon. 

A. K. Gowans........

E. P.&>ngdon........

Coneden, and Gowans. 

A. K. Gowans........

...,«>................

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

lo-...............

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

E. P, Caagdon........

A. K.;Gowans........

E.P. CoBgdon........ ....do................

Gray and Hank.......

....do..............II

0.56 

.46 

.48 

.47 

.47 

,74 

.81 

.65 

".48 

.47

.22 

.44 

14.96 

8.03 

2.59 

I.H 

4.12

See.-ft, 

192 

142 

153 

152 

148 

276 

173 

191 

161 

150 

177 

11384.;

150

June 6 

6

6

7

18

July 2

6

18

29

31

Aug. 1 

6 

10 

16

Sept. 5

-- SO

30

Congdon and MeCashin 

.....de.................

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

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

Gowans and MeCashin. 

Gowens and Coagdoo..

H«nkand

Gftn^den and KiBnisoiiRVJ-Hank............

H.-B. KtanteBB.-....-...

E. P. Coagdon.........

A. K. Goisraas.........

H. B. Kijiqdsoru.......

Gowans inS Kinnison. 

Congdon and Kinnison. 

A7Z. Gowans..;:-.J. .'.. 

Gowans^ad. tCpnjdw'..;;;

Feet.

5. 66 

8.68 

5. S3 

L76 

1.04

l!-28 

.12

-- ;68

-.03

-.08

-.12 

1.26 

.68

8&.-n.

5,570 14, tOO -- 

IfjSOO

722 ; 65$ ',

H.8

. 71.3

1 31.1

26.9

2L8

20.8

783

199 -

'758 "*

Surface.vejocity pbswved suid coefficient 'of 6.84 used to reduce to mean velocity. ' !L ' " '" " ill '"
SUEFACE WAfflEE StJPPLT, 1918, PAET VIII.

e£$ dKseftorgfe, iti second-fist, 'of Colorado Rive? at ustin, !7te., for We

Sept, SO, 19'18. '

Day.

l..............

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

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

H... ...........

5,*.. ... ...

«. .... ......

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

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

ft..............

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

11. ........:...

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

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

M..............

IS... ...........

!§.. ....... ......

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Oct.

174 

174

174 

196 

.180

184 

171 *n>

171 

171

in

138 

138 

138 

J35.

13& 

135 

132 

132 

132

130 

130 

128 

140 

140

140

128 

128 

, 128 

128 

123

Nov.

128 

128 

128 

142 

156

156 

158 

156 

156 

159

158 

159 

159 

159 

17*

,174 

174 

145 

145 

145

162 

177 

177 

- 162 

148

148 

177 

196 

196 

162

Dee.

148 

162 

148 

182 

177

,192 

174 

159 

159 

145

159 

156 

171 

156 

142

142 

142 

142 

162 

177

284 

281 

264 

272 

348

354 

324 

324 

300 

280 

280

Jan.

280 

280 

280 

280 

280

289 

280 

280 

280 

280

280 

280 

280 

280 

280

280 

280 

280 

280 

280

280 

280 

300 

490 

3,460

3.880 

2,280 

256 

236 

232 

212

Feb.

192 

188 

171 

171 

171

188 

188^ 

171 

171 

171

171 

171 

171 

171 

171

. 158

272 

292

272 

232 

192 

188 

184

168 

156 

174

Hair.

196 

216 

220 

200 

204

 204

m

168 

153 

153

159 

165 

156 

150

138

122 

110 

110 

125 

125

138 

112 

128 

90

78

80 

80 

80 

95 

120 

177

Apri

196

220 

200 ids

264

1,660 

440 

135 

135 

159

159 

758 

3,380 

2,980 

500

38,400 

18,500 

9 150 

5,280 

3^460

2,280 

1,440 

1,050 

800 

730

718 

1,010 

912 

816 

786

May.

716 

702 

490 

408 

600

636r 

636 48»< 

392 

450

624 

552 

510 

758 

978

1,090 

960 

730 

552 

450

8,730 

9,690 

4,120 

2,550 

1,680

1,280 

1,010 

816 

660 

540 

.470

June.

400 

354 

336 

1,070 

11,200

22,,400 

11,400 

*,780 

3420 

2^050

1,590 

2,120 

2.330 

4,490 

3,820

2,520' 

1,940 

1,490 

1,620 

1,510

1,120 

718 

564 

540 

636

510 

330 

232 

318 

600

Jtfly.

50tf 

342 

248 

232 

220

786 

912

896 

928

864

832 

730 

874 

648 

688

888 

838 

648 

832 

1,010

744 

588 

,716 

410 

74

83 

52 

45 

38 

36 

39

Attf.

 '*'

60 '50 

» 

39

m

34 

27

29 

29 

28 

25 

84

25 

, 22

 ., & 

- ,22 

23

24 

25 

24 

22 

29

3fr 

60 

702 

. 928 

996 

£30

i«hpt.

166 

. 168

450 

1,030 

. 1,010 

330 

2,520

1,400 

M,160 

6S& SSMf 

716

158 

432 

1,010 

, 424 

86$

138 

132 

130 

' 122 

112

120

3,970 

3,050 

2,830 

718

Monthly discharge of Colorado River at Austin, Tex., for the year ending Sept. SO, 1918.

Month.

October............... _ ................................

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

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

Aprfl... ................................................. May......... ...........................I.:.:.:;;.:......

Jane.....................................................

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

September... ....... ........................... _ ......

Discharge in second-feet.

SCjUXtTDttffil.

196 

198 

354 

3.880 

292 

220 

38,400 

9,690 

22,400 

1,010

m

3,050

38,400

Minimum.

128 

128 

142 

212 

156 

78 

139 

392 

232 

36 

22 

105

22

Mean.

148 

159 

209 

§65 

193 

143 

3,220 

1 420 

2,956 

520 

131 

725

885

Run-oft in 

acre-feet. 

9,100 

9,480 

12,900. 

34,700 io,m , S^TiS

m,w

176J06&;

a! 060

46,100

$27,000

EVAPORATION NEAK AUSTIN, TEX.

LOCATION. At reservoir on Hill's ranch, 1,000 ieet from ranch house, Smiles south; 

of Austin, Travis County. Elevation 475 feet above sea level. '

RECORDS AVAILABLE. April, 1916, to September 30,1918. .

EQUIPMENT. Two evaporation pans, one floating on sjirface of reservoir and the other 

on land about 30 feet from reservoir; auxiliary equipment consist*fof hboi gages, 

rain gage, anemometer, maximum and minimum thermometers, and psychrometer..
COLOEADO EIVEE BASI&. 

Evaporation war Avatm, Tex., for the year . SO,

Month.

October.........

November.......

February........

March.

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

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

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

August. .........

The year..

Temperature (*F.).

Air.

Mean maximum.

81.5 

74.7 

57.6 

57.9 

65.1 

*76.7 

77.7 

85.6 

 96.6 

99.7 

99.2 

88.5

80.1

Mean minimum.

49.1 

41.8 

33.1, 

25.8 

39.4 

50.6 

54.0 

65.5 

71.0 

72.3 

72.6 

«1.1

53.0

Mean.

65.3

58.2 

454 

41.8 

52.2 

b«3.6 

65.8 

76.6 

83.8 

86.0 

85.9 

74.8

66.6

Water.

Floating 

psn 

(mean).

62.0 

53.5 

*51.3 

»43.2 151.3 

58.4 

65.4 

73.9 

79.0 

78.7 

78.1 

69.7

63.7

Land 

pan

(mean).

55.6

48.6 

S48.4

a 50.5 

55.4

60.8 

69.7 

75.7 

74.9 

74.5 

64.6

Mean relative humidity 

(per 

cent).

66.3

75.4 

876.4

d84.4 

*75.1 

84.1 

86.7 

80.3 

72.1 

80.5 

78.1

Wind.

Avermiles 

per 

hour.

2.8 

2.1 

3.8 

4.5 

4.3 

3.9 

1.8 

1.5 

1.4 

2.3 

2.2 

2.6

2.8

Prevail- ing direction.

South. 

South. 

North. 

West..

South. 

South. 

East.. 

South. 

South. 

South. 

South. 

South.

South..

Rainfall 

(inches).

0,42 

1.47 

T.

.86

L83 

.96 

4.22 

2.20 

1.39 

.09 

.26 

2.21

15.91

Evaporation 

(taajhes).

Moat*

ing 

pan.

6.41, 

2.68

2,80

1.28 

4.22 

4.71 

6.03 

8.25 

10.22 

8.53 

6.13

Land 

pan.

7.15 

4.05 

1.92

3.42 

6.40 

6.05 

7.03 

9.05 

12.34 

10.26 

8.75

NOTE. Reference letters », b, «, etc., appearing in the table indicate number of days for which no record 

was obtained. For example, b represents 2 days, etc.

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 (revised).

RECORDS AVAILABLE. January 1, 1903, to December 31, 1911; May 2, 1916, to September 30, 1918. Records of stage have been obtained by the United States 

Weather Bureau since January 1, 1903. (Occasional discharge measurements, 

beginning August 2,1902.)

GAGE. Chain gage attached to downstream railing of bridge; read by A. S. Lowrey. 

From January 1, 1903, 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 

was read from December 17, 1907, to February 9, 1917, when regulation ehaii* 

gage was installed. Mott gage and chain gage were referred to same datum. . 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; likely to overflow. Bed of stream dean and sandy; shilta 

during high stages. A sand and gravel section about 350 feet below gage serves 

as low-water control, and the stage-discharge relation during medium and high 

stages may be controlled by a bend in river below bridge.

EXTREMES OP DISCHARGE. Maximum stage recorded during year, 22.7 feet at 7 a. m. 

April 18 (discharge, 30,100 second-feet); minimum stage, 5.18 feet from 7 a. m. to 6 

p. m. September 1 (discharge, 93 second-feet).

1903-1911; 19^6-1918: Maximum stage recorded, 35.8 feet April 27, 1908 (dii^ 

charge, 43,100 second-feet); minimum stage, 4.2 feet September 9 and 10, 1910 

(discharge, 10 second-feet).

ICE. None reported during year*
32 SUBFACE WATER SUPPLY, 19-18, PART VIII.

DIVERSIONS, Considerable diversions for irrigation in the basin above Austin, but 

between Austin and Columbus little water is taken out. The station is above 

the irrigated rice belt, which comprises several thousand acres. Declarations 

reported by the State Board of Water Engineers for continuous use of water for 

Smithville, Bastrop, and La Grange waterworks; all above station. Smithville 

reported a consumption of 193,000,000 gallons during 1916.

REGULATION. Flow at Columbus during ordinary stages controlled by storage at 

Lake Austin.

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

below 45,000 second-feet. Gage read to hundredths twice daily. Mean of two 

readings may not be a true index of daily discharge because of regulation above 

station. Daily discharge ascertained by shifting-control method. Records fair.

COOPERATION. Morning gage readings furnished by United States Weather Bureau.

Discharge measurements of Colorado River at Columbus, Tex., during the year ending

Sept. 30, 1918.

Date.

Oct. 30

Mar. 3

May 10 July 8

Made by 

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

Gage 

height.

Feet.

1 SJ.

6.26

6.14

8.08

6.30

Discharge.

Sec.-ft. 

168

331

273

i 9Qft

444

Date.

July 12

28

Aug. 11

Made by- Gage 

height.

Feet. 

7.23

6.90

5.51

7.78

Di£- 

charge.

Stc.-ft. eoj

715

144

1,180

Doily discharge, in second-feet, of Colorado River at Columbus, Tex., for the year ending

Sept. §0, 1918.

Day.

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

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

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

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

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

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

7.............. I - . ft

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

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

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

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

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

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

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

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

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

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

ai....... .......

33... ...........

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

34..............

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

26,.... .........

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

38i.............

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

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

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

Oct.

376

328

344

. 336

320

310

292

274

nao

257

254

247

238

235

229

214

212

195

195

195

187

187

187

187

182

173

, 173

173

170

164

182

Nov.

173

168

168

170

170

173

180

180

180

180

187

187

187

187

185

187

190

198

212

217

220

'278 244

244

214

214

203

208

203

203

Dec.

206

206

206

206

206

200

209

203

198

198

200

200

200

200

200

203

203

209

209

209

220

220

220

239

220

214

209

244

313

306

299

Jan.

310

302

376

274

274

302

316

313

324

320

324

340

356

376

372

368

352

352

352

328

340

336

332

332

328

324

328

1,210

2,440

1,950

1,340

Feb.

750

590

500

425

384

368

348

340

356

450

360

320

2SS

274

274

260

247

26S

348

316

620

570

450

364

368

336

313

299

Mar.

285

278

274

296

340

332

282

260

274

235

223

223

223

209

206

203

198

198

192

185

182

625

620

2£9

282

274

206

190

200

260

560

Apr.

384

299

328

368

515

1,670

3,240

3,860

2,290

1,680

884

580

440

372

328

2,440

17^100

26,200

12,700

7,910

4,860

4,040

3.000

2,390

2,050

1,800

1,710

1,440

2,770

15,400

May.

5,330

7,720

3,190

1,970

1,280

7,610

5,520

2,330

1,670

1,360

1,130

890

715

974

1,110

914

745

932

1,050

1,100

932

760

2,360

6,620

4,430

3,280

2,520

2,040

1,660

1,380

1,180

June.

1,010

878

770

938

620

550

4,460

15,600

8,780

6,530

4,720

3,490

2,640

2,160

2,300

2,800

4,060

3,410

2,640

2,210

1,780

1,680

1,630

1,460

1,240

950

830

775

775

July.

640

520

480

655

650

575

490

450

400

540

S42

824

860

836

824

715

670

680

715

725

720

720

926

1,930

824

785

800

660

530

388

382

Aug.

328

282

260

220

195

185

173

168

160

149

145

143

138

136

130

125

118

U8

128

133

115

107

105

102

107

185

138

103

104

M

96

Sept.

93

147

625

580

410

296

241

217

200

178

630

890

848

1*350

1,180

818

1,090

755

2,380

2,040

> 60S

415

339

268

198

190

138

380
COLORADO EIVEB BASI3ST. 83 

MontMy discharge of Colorado River at Columbus, Tex.,for the year eneKng.Sept. SO, J91&.

Month.

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

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

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

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

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

Mftv

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

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

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

Discharge in second-feet.

Maximum.

376 

278 

313 

2.440 

760 

625 

26,200 

7,720 

15,600 

1,030 

328 

2,380

26,200

Minimum.

164 

168 

198 

274 

247 

182 

209 

715 

590 

332 

85 

93

93

Mean.

235 

197 

218 

513 

386 

276 

4,100 

2.410 

2,750 

670 

151 

667

1,040

Run-off In 

acre-feet.

14,400 

11,700 

13,400 

31.500 

21.400 

17,000 

244,090 

148,080 

164,000 

41,200 

9,280 

39,700

756,090

COLORADO RIVER AT WHARTON, TEX.

LOCATION. Just below highway bridge in west edge of Wharton, Wharton County, 

200 feet below Galveston, Harrisburg & San Antonio Railway bridge.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. July 12, 1916, to August 4, 1918. Station maintained only 

when water is being released from Austin Lake for rice irrigation.

GAGE. Vertical staff attached to tree on right bank about 75 feet below highway 

bridge; read by Henry Marsh.

DISCHARGE MEASUREMENTS. Made from highway bridge or by wading.

CHANNEL AND CONTROL. Channel straight above and below station for a few hundred 

feet. Bed of stream composed of sand and clay. Banks medium in height, 

composed of clay, and subject to overflow during extreme stages. Discharge 

measurements show control to be fairly permanent but at times subject to shift.

EXTREMES OF DISCHARGE. 1916-1918: Maximum stage recorded during periods of 

record, 3.27 feet at 3.30 p. m. July 25, 1916 (discharge, 1,680 second-feet); minimum stage, 0.90 foot at 7 a. m. August 1, 1917 (discharge, 62 second-feet).

ECE. None reported.

DIVERSIONS. Station is in area of rice irrigation and considerable water is diverted 

above for that purpose. The second report of the State Board of Water Engineers 

shows 51,126 acres were declared irrigated in Colorado and Wharton counties by 

using 102,252 acre-feet of water. A large part of this area is irrigated by water 

pumped from Colorado Elver above the station.

REGULATION. Flow is regulated by diversions for rice irrigation and storage in 

Austin Lake.

ACCURACY. Stage-discharge relation subject to change. Rating curve fairly well 

defined. Gage read to hundredths twice daily. Mean of two readings may sot 

be a true index of daily discharge because of regulation above station. Daily 

discharge ascertained by applying mean daily gage height to rating table. 

Records good.

Discharge measurements of Colorado River at Wharton, Tex., during the year ending Sept.

SO, 1918.

Date.

July 11

14

27

Made by 

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

Gage 

height.

Feet.

0.28

1.24

.81

Discharge.

See.-ft. 

235

618

503

Date.

Aug. 13

Made by- Gage 

height.

Feet. 

-0.90

1.80

, Dis-, 

charge.

«**#. 

21.$

877
SURFACE WATER SUPPLY, 1918, PART VIII,

Daily discharge, in second-feet, of Colorado River at Wharton, Tea;., for $« year ending Sept.

30, 1918.

Day.

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

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

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

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

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

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

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

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

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

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

July. Aug.

221

166

156

137

Day.

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

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

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

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

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

1«. .............

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

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

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

20

July.

234

400

616

625

635

592

V)A

493

489

538

Aug. Day.

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

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

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

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

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

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

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

9fi

29

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

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

July.

551

5Q6

465

AAO

611

655

515

582

sao

425

236

Aug.

*

NOTE. Mean discharge, July 11-31, 510 second-feet (total 21,200 acre-feet); Aug. 1-4, 170 second-feet 

(total 1,350 acre-feet).

COLORADO RIVER SEEPAGE INVESTIGATIONS.

MEASUREMENTS. An investigation of gains and leases from seepage in Colorado 

Rive* 'between Robert Lee, Tex., and the mouth was made in August, 1918. 

The stream was divided into five sections, and a hydrographer detailed to each 

section. The discharge was measured at various intervals along the main stream", 

at the mouth of each tributary, and at the point of each diversion. Gages at 

Bronte, Ballinger, Ohadwick, Marble Falls, and Columbus are read twice daily, 

and at Austin a continuous recorder is maintained. Although data were insaffi* 

cient to warrant a correction of discharge for time interval these gages showed 

the stream to be at a practically constant stage, with no floods to interfere with 

the investigation, so that few corrections for time interval were necessary.

These data represent natural conditions as they were found above Columbus, 

but below that point the flow was practically all diverted for rice irrigation. It 

is therefore difficult to draw definite conclusions from the measurements made 

below Columbus. During the investigation the reservoir, formed by the Austin 

dam, was empty, and the natural flow was passing through the dam. An extremely low stage existed throughout the course of the stream. The foitowing 

table gives the results of the measurements:

Seepage measurements, in second-feet, on Colorado River from Robert Lee, Tex., to nfouth

of stream in August, 1918.

Stream or diversion.

Oak Creek.........

Valley Creek.......

Colorado River.....

Colorado River. ....

Salt Creek,. ........

Buhl Creek.........

Location.

Bronte.

bridge.

Mouth..................

Mouth..................

Mouth..................

ger.

Mouth..................

Mouth..................

Mouth..................

Mouth..................

Mouth..................

Mouthf..... ............

AP-.

proximate distance

(miles).

0

12

14

15

20

21

22

36

42

43

61

61

70

74

an

of

Oft

99

Date.

7

7

7

7

7

7

7

7

7

7

7

7

7

7

7

7

7

7

Discharge 

of main 

stream.

0

6

6

6

r

0

0

Inflow.

0

0

0

0

0

0

0

6

0

0

0

0

Diversion.

Section 

gain or 

loss.

0

0

0

0

0

0

Total 

gain or

loss.

...[....

0

6

0

........

!-: 

. ..).....
CQI^IIAJDO

^in aecond-ftet, on Colorado River from Robert J^et Jflffc, 

of streqip iy, August, 19i8 Continued. '

Stream « divwsloD.

Colorado River.. . . .

Colorado Blver..... 

Clear Crefik... ......

Colorado River.....

Bough Creek.......

KWPeriUnsditdi.

S.M. Jones ditch... 

Cottonwood Creek.

Colorado Eiver..... 

OMfisby - Dawson 

^^h. 

garae Creefe........

» H. HoMOod 

difato. L 

STescott Creek..... BullCreefc. -.. .

 Yarbroughditeh... 

Nabors Creek .

Ednumdson ditch. .

San Saba River.... 

Colorado River.....

Colorado River. .... 

Elliott Creek

Bed Bluff Creek.... 

Antelope Creek,.... 

Bourii Creek.......

Brarilditch......:.

MeCourryditdi.... 

ColwUio River..,.. tSittrekee Creek..... 

Colorado River.. . . . Colorado River.. . . . Morgan Creek...... 

Colorado River.....

Colorado River. .... 

Colorado River.,,..

Colorado River..-..

Soarerib Creek..... 

Ratraek Creek,.... 

tittle Cypress Creek 

Pedernales Riven.. 

Colorado River. « . , .

f^fcax f^p&o!^

Colorado River. ....

Colorado River..... 

*WilltaQ3 pump ....

tjolojado 'Biveri^ . ", . 

Santa Monica 

Springs.

Morman Springs. . . 

CblfsSdtt^eT.,... 

Colorado River.....

Barton Creek. .....

Austin water suprkflnrarfn Ri-piW.- . . .

Locatioa.

Mottta. .................

Moath.. ................

Brownwood - Richland 

Springs crossing. Mouth . 

Moutn.. ................

one-quarter mile above

1 mile below Regency . . . Month,. ................

Mouth'.'......,..........

Mouth..................

Mouth... . ,.......; . Mouth of Peean Bayou.. 

6 allies balovr Pecan 

Bayou. Moufli.. ................

Mouth..................

Mouth...................

11 miles nortflWBst of 

SanSaba. 

MeUtti. .................

1 J miles above San Sab,a - 

1 mile above San 8ab»... 

Mouth..................

Below mouth of San 

Saba River. 

Oa£in§^ station near 

1 Chad wick. 

Mouth- ...... ...........

Month. .................

Mouth..................

34 miles above Bend. . . . 

l| miles above Bend. . . . 

Bend.................... 

Mouth.;... ..... ....!».

Tow.................... 

Bluflton. ...............

Mouth..................

Blufiton-Kingsland road 

Month..................

Mouth..................

Below Liano RiveJ. ..... 

1 mile abov« Sandy Creek. 

Mouth.,... ..............

Mouth.....1 ..'.......:...

, 3i miles abovfi Marble 

tails. 

Mouths. ...............

Moath..................

Mouth of Pedernales 

Eiver. Moxitb.'...<. ...........

8 miles below mouth of 

, Pedernales River.

, Above Sandy -Creek v . a . Mouth...... ..< .,..,. ..

WstsoiiFotd. :..!.. '.I 1..

 Oanmro& JPord. .........

1 mile below Cameron

M .., . . .;-h.-.: .i::.-./.V;.

1 mile above Austin dam. 

Beitrw Austin dam. . . . . . 

One-quarter mile below 

Deep Dddy. 

Mouth..................

Aus«i|.. : ..rT.. tr....rf ..,,. 

dntrine station at Austin.

proxi- A%

mate distance 

(mites).

110 

118 

126 

131 134-

148 

149 

150f

151 

154 

157 

163 

164 

164 

170

173 

174

174 

176 

176

180 

188 

189 

190 

190

193

194 

198 

198 

204 

205 

206 

208 

210 

232 

241 

241 

248 

252 . 263 

263 

268 

269 

272 

276

280

251 

295 

304 

304

305 

310 

.312

314 

332 

322

J322*

nnft

33JB;

337

344 

347 

348 

349

350

350J

351

Bate.

8 

8 

8 

8 

8

7 

7 

7

7 

7 

7 

7 

7 

7 

8

8 

8

8 

8 

8

8 

8 

8 

8 

8

9

9 

9 

9 

9 

9 

9 

9 

9 

9 

10 

10 

10 

10 

10 

10 

10 

10 

10 

11

11 

11 

9 

8. 

9

9 

9 

9

9 

9 

9

 ' 9 

10- 

10

"10"' 

10

 10

10

10 

10

10

Discharge ofmaiB 

stream.

0

0

0

, 2

*

5.2 

4.0

0

3.5, 

3.5

2.6

3.7 

3.0

3.0'

9.0

9.2

7.8

6.e &.&,

;f,-«0'

2&S 24. a,

26.9

Inflow.

6

6

0 

0

0

0 

0

0

0

0 

0

^ 0

2.9

,,

.0

.0

.0-.1

^

.0

0

0

, >a

«.,...,.

0 '*

_o

0

0 

,0

0=

0 

.1

{ ,

.6

J "A£

LO

143

..f »....

Diversion*

3.0 

1.6

1.4

.4

; *i"6

.8

1.CF

1 ,

L4 

2.6

i

t

 ."- I-'

, .-.2.

1

;.;.

«i-

, »f>

Section 

gain or loss.

9

0

0

4 fct

1 ,. 

¥f.7

- M

" « I

+ 3.5 

.0

- .9

4- .»

* - 1'

-..6

+ 6.0

4- ; .2

- t'«

'-c-'iT

.+ J.4'

4-ll»8

,t.;f,T;

..i.^i.i.*

4- :i

Total 

«^

0

0

9

'

,+ $i

¥f ii.5

4-10.8

t 10-2

4- 13.7 

4- 13.7

4- 12.8

4- 13.7 

4- 13.6

4- 13.0

4- 19.0

4- 19.2

4- 17.8

4- 16.7 

4- 18.1

.+ 29.6 

,4-38.8

4- 33.7
SURFACE PAET VIII.

Seepage measurements, in second-feet, on Colorado River from Robert Lee, Tex>, to mettfft 

of stream in August, 1918 Continued.

Stream or diversion-.

Walker property

.puxnp.

Colorado River.....

Colorado River. ....

Piriey Creek. 1......

Colorado River.....

Colorado River.. . . .

Colorado River. ...

Co.

Colorado River.....

Location.

5 miles below Austin ....

Platts Ferry.

Creek.

Utley Ferry.

Bastron .................

Sinithyille.... ..........

Smiles north of West

Point.

BUS.

plant.

Glenflora.. . .............

Dr*y Creek. .............

Bay City.. ..............

Ap-. proximate distance 

(miles).

356

362

362J

366

36ft

383

395

400

403

426

437

438

4%

458,

463

470

486

487

510

510

516

520

520

541

544

547-

555

561

569

571

575

593

Date.

10

10

10

10

10

10

10

10

10

10

11

11

11

11

11

11

11

11

' 12

12

12

12

12

13

13

13

14

14

14

14

14

V

- Discharge 

of main 

stream.

^,

51.1

48.6

63.5

83.7

101

102

123

132

144

9S.6

30.2

80.2

21.5

0

.8

Inflow.

0

0

0

0

0

0

0

Diversion.

<

, 3.2

1.1

1.3

PI

71.6

5.0

70.6

73.5

99.3

6.1

1.3

Sectioa 

gain or

loss.

+au

- .1

+149

+20.2

+1£3

+ LO

+21.0

-i, 8 A

+ii'0

+27.2

+ 6.2

+50

+14.8

+85.2

a. 8

?.}*# gain or

loss.

+ j6i.l

+ &;$ + 7S.9

+ &I

+'113.4 -

f+il£i

4-135,4

H-'&i*

+156.4

+183,6

+i8S».8

+339. S

+254.6

+339.8 +340.8

INTERPRETATION OF RESULTS . Above the mouth of San Saba River the stream was 

dry with the exception of a flow of 0.2 second-foot at the mouth of Pecan Bayou. 

The course of the Colorado from Chadwick gaging station to Austin is through 4 

rough and rugged country; most of the distance is through canyons and gorges, 

with a few stretckes of valleys. Between the Chadwick and Marble Falls gaging 

stations there was a slight gain. From Marble Falls to Austin dam the flow 

increased from 3 to 21 second-feet. Between the Austin dam and Austin gaging 

station there was a sectional gain of 3.5 second-feet, and from the Austin gage to 

Platts Ferry, a distance of 11 miles, the sectional gain was 27 second-feet. From 

Platts Ferry to Columbus the flow increased from 51 to 144 second-feet, or a gain 

of 93 second-feet in 125 miles. As previously stated, the .flow below Columbus ia 

practically all diverted. Lack of sufficient data for time interval correc&ea 

makes records below this point of little value. The sectional gain of 32 secondfeet between Austin dam and Platts Ferry, a distance of 14 miles, is due, in all 

probability, to fissure streams or springs located in the Balcoaee fault zone, whkn 

tend to raise the level of the water table and increase the seepage iato the river.

HOETH COHCHO RIVER AT SAN AHQELO, TE3C.

LOCATION. At the concrete viaduct in San Angelo, Tom Green County, 1 mile abovi*

confluence with South Concho River. 

DRAINAGE ABEA. 7,536 square mites. 

RECORDS AVAILABLE. October 27,1915, to September 30,1918. ' . ,;,
COLORADO WPTSB BASEST.

-Vertical staff attached to web of three spans from kit bank; auxiliwy St«ff 

on left bank 75 feet upstream from bridge referred same datum read during low 

and medium stages; read by T. R. Lyle.

DISCHARGE MEASUREMENTS. Made by wading 400 feet below viaduct.

CHANNEL AND CONTROL. Bed composed of solid rock which is, to some extent, 

covered in high-water channel with grass and moss. Channel straight for several 

hundred feet above and below gage. Banks are sloping, clean, composed of 

rock and day, and not subject to overflow except during high floods. About 

20 feet below gage and at downstream side of viaduct is a concrete dam about 4% 

feet high, formerly used as a low-water crossing, which forms the control and 

» insures a permanent stage-discharge relation.

EXTREMES o* DISCHARGE, Maximum stage recorded during year, 2.86 feet at 1.30 

p. m. May 18 (discharge, 8&0 second-feet); no flow during several periods throughout the year.

1916-1S18: Maximum stage, 4.90 feet at 8.30 a. m". April 18, 1917 (disdtafge, 

1,900 second-feet; obtained from extension of rating curve and possibly subject 

to considerable error); no flow during several periods of each year.

Id. None reported during year.

DIVERSIONS, The second report of the State Board of Water Engineers shows some 

water is diverted above station, but the quantity is not known.

R»GULATioN.*-Flow not regulated.

ACCURACY. Stage-discharge relation permanent. Rating curve well-defined below 

200 seeaad-feet, but Subject to error above that point; gage read to hundredttis 

daily, oltener during high water. Daily discharge -ascertained by applying mean 

daily gage height *° rating table. Records good.

Discharge measurements of North Concha River at San Angela, Tex., during the year

ending Sept. SO, 1918.

Date.

Oct. 30

Dec. 17

Jan. 31

Feb. 26

M»r. 27

Made by 

E. P. Congdon. ...

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

Gage 

height.

Feet.

Discharge.

8<K,jt.

0.0

.0

.0

.0

.0

Date.

Apr. 27

Msra *2fi

July 18

Aug. 22

Made by 

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

E. J. Hank............

a.

JM.

.38

.72

Discharge.

See.-ft. 

0.0

.2

6.6

.0

Do% discharge, in second-feet, of North Concho River «nt San Angela, Tex., for tt» year

ending Sept. 30,1918.

Day.

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

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

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

................

S.. .............

t.. ............. 3.*. ... . .

*:::::::::::::::

...............

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

II...............

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

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

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

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

May.

174

143

28

?.9

S.I

-8.1,

1.9

-i.a

.8

.1

.1

June.

150

88

19

24

1$

24

9.1

6.3

4.2

SO

5.6

July.

214

Sept.

8 a

04

6.3

4.3

2.1

.8

.4

.1

Day.

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

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

is

19

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

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

28 ....

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

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

25 ....

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

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

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

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

3001

May.

880

86

28

7.1

4:2

9 I

1.9

1.1

.5

,3

.3

.3

.1

June.

2.4

1.2

k

.4

.3

.2

.1

July.

126

10

5.6

3.1

1.6

.«

«X

* *

Sept.

NOTE. Discharge on May 18 obtained by extension of rating curve and subject to error. No flow on 

days for which no discharge is given.
SURFACE WAfEB PAST VIII.

Monthly discharge of North Coneho River at Son Angelo, JVte;, for the yean* m&ng &spt. 

, 30r 1918.,

Month.

May... v

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

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

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

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

Discharge in aeccmd-toet. .

M&xb&nni.

880 

302 

214 

34

880 .

Minimum.

0.0 

.0 

.0 

.0

;0

Mean.

M.4 

24,7 

11. T

3. 72 ,:

7.10

Run-off 

 inaete* /

.. *»* 

i 2>730 ' s

231

6,1*0

COffOHO RIVER WEAR SAW AWGElA TBX,

LOCATION. Half a mile below confluence of North Concho and South OoDjcho rivers 

and If miles southeast of San Angelo, Tom Green County. . , DRAINAGE ABKA. 10t800 square miles.

RECORDS AVAILABLE. September 17, 1915, to September ,30, 1918. s

GAGE. Stevens water-stage recorder installed August 9, 1917, OB right bank, 1,500 

feet below an old ford. Prior to August 9,1917, a vertical staff-gage in several 

sections attached to trees on left bank directly across river from site of present 

gage. Both gages 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. Bight bank high, rocky, wooded, and 

not subject to overflow. Left bank clay and gravel, of medium height, covered 

with scattered growth of trees, and subject to overflow at high stages. Control 

for medium and low stages is rapids just below gage; control for high stages not 

known. Stage-discharge relation affected by moss during low stages,

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 13.8 feet at 1.80 

p. m. May 17 (discharge not determined); minimum stage, 0.38 foot from 8 to 10 

p. m. August 18 (discharge, 0.2 second-foot). 

1915-1918: Maximum and minimum stages occurred in 1918.

ICE. None reported during year.

DIVERSIONS. Considerable water is diverted above and below the station. Second 

report of the State Board of Water Engineers shows that a total of 22,000 acre-feet 

annually is taken from the stream. The water-supply storage dam constructed 

by the San Angelo Light & Power Co., about a mile above mouth of South 

Concho River has a small capacity and will not greatly affect the natural flow 

of the stream.

REGULATION. Storage at the dam of the San Angelo Light & Power Co. has slight 

effect on flow at station; no regulation by storage on North Concho River.

ACCURACY. Stage-discharge relation permanent except during low stages when affected by moss. Rating curve well defined below 600 second«feet. Mean daily 

gage heights obtained by inspecting graph, or, during days of considerable fluctuation, by planimeter. Operation of recorder good except for. periods; November 

to January, when stage was practically constant. Daily discharge determined 

by applying mean daily gage height to rating table, except shifting-control method 

was used when stage-discharge relation was affected by moss. Records good 

below 600 second-feet; others subject to considerable error.
, ; n. COl^QBADO

Discharge measurement* of Concha River near Sffify jjLngelo, ,Tex.^ duffing the year

Sept. SO, 1918.

' Date.

Dee. 17 

Jan., 8 

31 

Feb. 26 

Mar. 27

Made by -

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

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

Sf.

Feet. 

0.4» 

.54 

1.03 

1.02 

.79

Discharge.

Sec.-ft. 

1.4 

1.4 

'13.4 

12.^ 

5.1

Date.

Apr. 27 

May 19 

24 

July 18 

Aug. 22

Made by 

E.J:Haa&.............

.....do;:.:.............

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

Gaseheight.

Fed. 

0.78 *a

.88 

.52

e

&

Dislarge.

tc.-fi, 

2:0 

$05 

^6.7 

8.1 

2.6

jpaify discharge, in second-feet, of Concho River near San Angela, Tex., for the year ending

Sept. SO, 1918.

Day.

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

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

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

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

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

...............

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

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

...............

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

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

IS..............

1314....:.........

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

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

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

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

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

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

21.............. SB.........:...,

SB..............

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

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

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

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

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

29

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

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

Oct.

2.9

3.0

2.9

2.8

2.8

2.8

2.3

2.5

2.6

2.6

2.5

2.4

2.4

2 9

2

O

2..5

2.6

2.6

9 ft

2 ft

2.4

2

0

2:5

2.6

2 Q

2 ft

2 Q

2 Q

2.5

4-2

4.0

NOT.

4.2

3.4

3

0

3.7

3.6

3.8

3.5

3.5

3.4

3.4

3

0

3.3

o O

3 9

3.1

3 A

3.0

3.4

q j

3 A.

*> Q

2 a

3

- n

3 9

3

n

n n

3.0

3 A

i n

2.9

Dec.

2.8

2.7

2.6

2.5

2.5

, 3.4

2.3

4 9

2.1

2 ft

1 Q

1 ft

1,7 i.e

1.5

1.3

1.6

1 0

1

0

i s

1

0

1.7

1.6

1.5

1.4

1.3

1.3

1.4

1 0

2.0

2.0

Jan.

2.2

2.2

1.9

1.7

i.7

1.2

1.3

1.4

1.3

1.6

2.2

2.9

2.6

2 A

2.4

5 A

7 9

9 ft

11

10

10

n A

9.0

8.6

9

n

10

19

14

16

14

12

Feb.

7.0

6.5

7 9

a n

7

0

 6.2

4.2

3

0

4.0

19

ll

iq

10

7.5

1*1

13

7.5

16

12

11

19

14

19

11

5.8

11

7.0

Istar.

3.6

7.2

10

5.0

8.9

,0.2

5.0

3.4

3.6

5.0

3.4

*J O

4.4

5.2

9.6

11

8.9

6.5

A n

4.0

5.0

9.6

7.0

7.0

6.0

6.0 d a

5.2

4.6

4.6

5.0

Apr.

s:s

5.8

5.2

3.8

2.8

4.4

3.4

3.0

4.4

3.2

4.0

3.4

3.6

2.5

2.4

2.5

2.8

2.6

2.0

2

n

1 a

1 8

2.4'

2 it

2.4

2.4

2

«

1 8

2.0

2.5

May<-

2.3

2.8

6.0

131

445

164

85

89

22

13

12

f O

11

12

7

0

6.8

2680

2860

485

210

152

70

16

Q O

4 ft

3 A

2.8

2.6

2.5

2.4

2.6

June.

2.3

2.5

221

805

120

<Lt

72

461

316

VV7

625

193

*>Af\

785

77

43

38

41

17

15

85

qi

, i»

11

6.5

3 ft

3.8

9 t\

19.

5.0

July.

3.6

2.4

2.5

1.9

1-8

1.3

1.1

1.1

1.1

1.3

1.1

1.0

.7

27

39

25

11

5.2

2.8

1.7

1.9

1.1

.7

.6

.5

.5

.5

.5

.6

.8

Aug.

e.7

.6

.5

.4

.4

,5

.4

.5

.5

.5

.4

.4

.4

.4

.6

.7

.6

.4

.5

.6

.6

1.0

.6

, .6

.6

.5

.6

.7

.5

.5.

.5

Sept.

0.5

.5

.5

j .6

. 2.0

13

41

19

6-8

3.4

*S

1.9

1.4

1.0

.6

.7

.8

.6

.7

1.3

1.1

.6

.6

.8

1.0

.8

1.1

.8

.5

.5

NOTE. No ga§e record Nov. 4-14; Nov. 30 to Dee. 15, Dec. 21-26, Jan. 11,18, 20-24, 25-28. and 30; dtscharge interpolated. Dec. 16 to May 3 and June 24 to Sept. 30, discharge determined by shifting-control 

method.

Monthly discharge of Concho River near San Angela, Tex., for the year ending Sept. SO,

1918.

Month.

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

March.

.A0riL............... .....................................

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

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

Discharge in second-feet.

Maximum.

4.2 

4.2 

2.8 

16 

16 

11 

5.8 

2,860 

805 

39 

1.0 

41

2,860

Minimum.

2.2 

2.8 

1.3 

1.2 

3.6 

3.4 

1.8 

2.3 

2.3 

.5 

.4 

.5

.4

Mean.

2.70 

3.28 

1.90 

6.31 

9.32 

5.93 

3.03 

241 

164 

4.55 

.54 

3.55

37.4

Run-off 

In 

aer^-leet.

166 

195 

117 

388 

i 512 

365 

ISO 

14,800 

0,780 

280 

33.2 

211

sir, ooo
40 SUEFACE WATER SUPPLY, 1918, PAET VIII.

COHCHO RIVER REAR PAnrr ROCK, TEX.

LOCATION. At Concho, San Saba & Llano Valley Railroad bri<ige a quarter of a mil* 

below mouth of Kickapoo Creek and 2 miles northwest of Paint Rock, Concho 

County.

DRAINAGE AREA. 11,800 square miles.

RECORDS AVAILABLE .-r-September 20, 1915, to September 30, 1918.

GAGE. Vertical staff attached to middle pier at downstream side of bridge; read l»y 

Oscar Skaggs.

DISCHARGE MEASUREMENTS. Made by wading or from bridge.

CHANSQBL AND CONTROL. Bed composed of solid rock, smooth, clean, and free Atom 

vegetation. Channel straight for 500 feet above and below gage. Right bmnk 

SOieet high, solid rock, clean, and not subject to overflow; left bank of medium 

height, sloping, wooded, and subject to overflow during high water. Control 

for low and medium stages is at a rock shoal 400 feet below gage; permanent, 

but affected by moss.

EXTREMES OP DISCHARGE. Maximum stage recorded during year, 8.5 feet at 9.30 

a. m. May 18 (discharge, 7,150 second-feet); no flow during several periods of year. 

1915-1918: Maximum stage recorded, 8.6 feet 11.30 a. m. September 24, 1915 

(discharge, 7,300 second-feet); no flow during periods of each year.

ICE. None reported during year.

DIVERSIONS. A considerable amount of water is diverted for irrigation both above 

and below the station.

REGULATION. Ten small storage reservoirs located between this station and San 

Angelo; have little effect on flow at the station except during extremely low water.

ACCURACY. Stage-discharge relation permanent. Rating curve fairly well defined 

below 6,500 second-feet; poorly defined above that point. Gage read to hundredth* 

once daily; oftener during high water. Daily discharge ascertained by applying 

mean daily gage height to rating table and by shifting-control method, when 

stage-discharge relation was affected by moss. Records good.

Discharge measurements of Concho River near Paint Rock, Tex., during the year ending

Sept. SO, 1918.

Date.

Oct. 30

Dec. 18

Jan. 30

Feb. 25

Mar. 28

Made by 

K.J. Hank... .........

A. K. Gowans.. ........

4EL

Feet. 

0.65

.70

.78

.81

Dis-, 

charge.

Sec.-ft. 

0.0

«.l

.0

».3

».7

Date.

Apr. 26

May 18

19

Tn ITT 1Q

Made by 

E. P. Congdon. .........

.... .do.. .7?.. ...........

Gage

height.

Feet.

.75

7.56

 3.50

.60

DIscharge.

Sec.-ft. 

«.l

5,720

994

.0

* Estimated.
COLORADO RIVER BASIS'.

Dm&s discharge, in 8econi-/iset> of Concho River near Paint JSoefc, Jet., for the year ewj&twjr

Sept. SO, 2918. fa ,

' i*y.

i... ........... *..... . ....

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

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

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

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

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

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

............... «::::.:. :.:::..

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

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

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

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

l*i..^. .........

1«........ ...... Mr.............. il...... .......

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

...............

a..............

as..............

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

2(25..............

as

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

...............

30

a..............

Oct.

1.0

.«

.3

.3

.3

.3

.3

.3

.3

.3

.8

.3

.3

.3

Nov.

.3

.3

.3

.2

.2

.2

.2

.2

.2

.2

.2

.2

.2

.1

.1

M

Dec.

.1

.1

.1

.1

.1

.1

.1

.4

.1

.1

.1

.1

.1

.1

Jan.

0.1

.1

.1

.1

.1

.1

Feb.

.3 

.2

.1

Mar.

0.2

.4

.4 

.4

.4 

.4 

.2 

.2 

.2

.4

.4 

.6 

.5

.5

.6 

.6 

.6 

.«

.6

'..7 

.7

.7

.7

.7

.7 

.7

.7

.7

.7

.7

Apr.

0.7

.6

.5

.4 

.8

.8 

.7 

.5 

.5 

.5

.5 

.6 

.5 

.4 

.2

.2

.'l

.1

.1

.1

May.

i.2 

114

302 

195

57 

27 

14

11 

11 

9.4

5.4 

4.5

3.5 

2.940 

6,320

834 

195

166 

137 

83 

34 

20

4.5 

3.6 

4.7

4.6

4.0

3.7

June.

2.5 

1.0

1.140

29* 

AW

137 

108 

55 

315 

900

374 

250 

96 

1.640 

137

14 

7.0 

6.1 

4.7 

2.5

42 

11 

7.0 

5.6

4.7

4.2 

.6 

.4

.4

July.

0.3

52 

25 

1.3 

1.2

.8

A

, .3

12 

11 

2.3

1.7

1.0

Aog.

0.8

s

.

4.7

1.4

.8

'1 '" '

-t^i'-*- 1

..].....

 ) 

>

i

178

15 

4.7 

4.2 

1.0 

.8

.7 

.5 

.3

NOTE. Discharge determined by sMftlng-control method, Nov. 11 to 20 and Feb. 25 to May 3. No 

How on days for which discharge is not given.

Monthly discharge of Concho River near Paint Rock, Tex., for tht year ending Sept. 30,

1918.

Month,

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

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

MM*..... ...............................................

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

*&........... ...........................................

June......................................:..............

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

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

Discharge in second-feet.

Maximum.

1.0 

.3 

.4 

.1 

.3 

.7 

.8 

6.329 

2,980 

52 

4.7 

178

6,320

Minimum.

0.0 

.0 

.0 

.0 

.0 

.2 

.0 

.0 

.0 

.0 

.0 

.0

.0

Meaa.

0.30 

.11 

.05 

.02 

.03 

.32 

.31 

371 

292 

3.53 

.25 

6.S4

56.5

Runoff 

in 

acre-feet.

,118.4 

6.3$ 

3.07 

1.2S 

!l.67 

32.0 

18.4 

22,800 

17,400 

217 

16.4 

407

40,900
42 SURFACE WATER SUPPLY, 1918, PART VIII.

COHCHO RIVER 8B3EPAOS JATtOHTS,

Seepage investigation on Concho River, including Spring Creek and North and 

South Concho rivers, was made March 27 and 28, 1918. With the exception oi the 

Middle Concho, numerous pumping plants are situated along each of the above streams 

and during the investigation there was a large amount of irrigating. This is the only 

factor that would affect results. Data were insufficient to warrant a correction of 

discharge for time interval, but in all the streams there was a constant stage previous 

to and at the time of the investigation so that correction for time interval was in moat 

cases not necessary.

In Spring Creek there was a gain of 10 second-feet in a distance of 27 miles. Above 

Spring Creek the Middle Concho was dry, but from the mouth of Spring Creek to the 

confluence with South Concho River there was a gain of 2 second-feet in 2 miles. 

The North Concho from a point above Sterling City to Water Valley showed a gain of 

7.5 second-feet, but from Water Valley to the mouth there was a loss of 2.5 secondfeet, making a net gain of 5 second-feet in 77 miles. In the South Concho from Christoval to the confluence with the North Concho there was a gain of 12 second-feet in 20 

miles. .In the main Concho there was a gain of 5 second-feet, but throughout the 

lower half of the river's course the measurements show there was a seepage loss. Prom 

the gaging station near San Angelo to the Paint Bock gage there are 10 dams and 

reservoirs which affect the accuracy of a seepage investigation. Interpretations of 

the measurements on the main Concho are therefore somewhat doubtful.

Seepage measurements, in second-feet, of Concho River from confluence of North and 

South Concho rivers near San Angelo, Tex., to the mouth, in March, 1918.

Stream or diversion.

Concho River......

Do.............

plant. Bed Bank Creek . . .

Pumping plant. ....

Pumping plant.....

Concho River......

Pumping plant.....

CondioBfver......

Lipan Creek. ...

Kickapoo Creek. . . .

Concho Biver ......

Do.............

Location.

Confluence of North and

South Concho rivers.

mile below confluence.

Mouth..................

Mouth..................

Miles.

South of Miles...........

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

Mouth..................

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

west of Paint Bock.

Mouth..................

Ap-.

proximate

tance

(miles).

0

.2

8.8

9.2

12.8

14

16

17

17.1

18

26.5

31.5

32

51.5

Date.

27

27

28

28

28

28

28

28

2828'

28

28

28

28

Discharge

stream.

3.8

5.1

.0

1.5

.7

.0

Inflow.

0.0

.0

.0

.0

Diver2.2

2.0

2.0

2.2

Section 

gain or

loss.

+1.3

+1.1

+3.7

- .8

- .7

Total 

gain or

loss.

+1.3

+2.4

+§«i

+5 & -

+*,*
(3OLOBADO BIVJSR BASIN.

Seepage meomrementi^tnifecorid-feet, of Sovth Concho River from 

""" with North Concho River, in March, 1918

Stream or diversion.

Christoval canal... . South Concho River

Pecan Creek........ South Concho River

Middle C en oho River. 

South Coneho River

Hank pumping

South Concho River 

Do............. Lovelace pumping plant. San Ajogelo Light 

& Power CO»'B pumping plant. South Concho River

Do.............

Location.

Christoval. ..............

300 feet below Christo- val canal diversion. Mouth.................. Just above month of 

Middle Concho River. Mouth..................

| mile below confluence with Middle Concho. i mile above Metcalfe diversion. 3} miles below mouth Middle Concho River. Just below Metcalfe di- version dam. Christoval road crossing. 1 mile below Christoval road crossing. 1 mile above mouth of South Concho River.

Just below San Angelo Liaht & Power Co.'s 

dam. Mouth..................

Approxi- mate' 

distance (miles).

0 

0

9 11.8

12 

12.5 

15 

15.5 

16.5

16.5 

16.8

19.3 

19.3 

19.8

Date.

27 

27

27

28

28 

28 

28 

28

28

28 

28

28 

28 

28

Discharge 

of maui 

stream.

3.4

5.8

11.9

.0 

.4

1.0

3.8

Inflow.

0.0

3.9

,

Diversion.

9.7

2.7

12.0

.9

1.2

Section 

gain or 

loss.

+2.4

4-2.2

+2.8 

+ ,4

+2.7 

+2.8

Total gain or loss.

+ 2.4

+ 4.9

+ 7.4 

+ 7.8

+10,5 

+13.3

Cbeck data, South Concho River, April, 1918.

South Concho River

MlddleConcho River.

Middle Concho River. Mouth........

with Middle Concho River.

11.8

12

12.8

15.5

27

27

27

27

2.0

6.0

' 18

6.2

+2.2

Seepage measurements, in second-feet, of Middle Concho River from San Angelo-Mertzqn 

road crossing to mouth, in March, 1918.

.Stream or diversion.

Eiver.

Do.............

Location.

road crossing near

. .Arden. Mouth..................

Ap- proximate distance in

miles.

0

22

Date.

27

28

Discharge 

of main 

stream.

0.0

3.9

Inflow. Diversions.

Section 

gain or 

loss.

+3.9'

Total 

Pin or, 

loss.

+3.9
44 SURFACE WAOTB SUPPLY, IMS, PART YIII.

StepagA mtasurements, in second-feet, on North Goiteto RiyefJr&m po 

1 City to confluence with South Concho Riter, in March, S

Stream or diversion.

River. 

Do.............

River. 

Do.............

River. 

Do.............

North Concho

River. 

Do.............

H.K.Ray pump...

River. 

Do.............

Do.............

Do.............

North Concho

River. 

Do.............

Do.............

Do.............

Do.............

Do.. ...........

Do.............

Do.............

Do.............

Pump Carlsbad

sanitarium. 

North Concho

River. 

Do.............

Do.............

Do.............

Do.............

Do..'...........

Do.............

Do.............

Location.

 miles above Sterling 

Citv.

City.

City.

City.

City.' 

7 miles above Sterling

City. 

Mrs. Byers dam. ........

City. 

4f miles above Sterling

Citv.

City.

City. 

3 miles above Sterling

City.

City.

Sterling City. ...........

City. 

6 miles below Sterling

City.

City.

City.

City. 

25 miles below Sterling

City.

City. 

Water Valley. ..........

City.

below Water valley. 

Carlsbad................

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

gelo.

gelo.

Approximate distance la 

miles.

0

1

1.0

95

IS

?

41

6i

A3

7J

as

g

O4

cut

in*

12i

131 IB*

ioa

22f

w3

O1 3

003

iaa

45*

51J

55|

55|

60t 64-1

65f

ins

77

78

Date.

25

25

25

25

25

25

25

25

26

25

25

25

25

25

25

25

25

25

25

25

25

25

25

26

26

26

26

26

26

26

26

26

26

26

26

Discharge 

of main 

stream

0.2

1.2

.3

.1

.2

0

.1

.3

,2

.2

.1

.0

0

0

.3

.0

.0

.9

1.8

2.7

1.7

1.5

1.5

1.3

.0

.2

.1

.2

.2

Inflow

0

Diversions,

2.3

.2

: 1.8

.4

.3

.1

Section 

gain or 

loss.

+1.0

+ii

_ 2

+ .3

_ 2

+L9

+ .2

-t .6

.0

- .1

_ j

0'

.0

+ .3

- .3

.0

+ .9

+ .9

+ .9

-1.0

- .1

.0

- .2

-1.3

4- .2

 1

+ .1'

.0

Total 

gsaaar 

loss.

+W>73

 4-2.*:

4-2.1

4.2.5"

+2.3

+42.'

+4.4

+5.0

+5.0

+49

+48

+48

+48

+5.1

+48

+48

+5.7

+6.fl

+7.5

+ft.5

+6.4

+6.4 +&a*

. +4S

+5.1

+5.0

+5.1

+5.1
COUOBADO BASIH. 45

Setpaffe measurements, in second-feet, <m Spring Creek from Seven Spn&$$, 

Tea;., to mowtft, tn March, 1918. ,

Stream or diversion.

Do.............

Mertzoa canal......

Spring Creek../....

Eetnm water from

Mertaon canal. 

Spring Creek .

Bo.;...........

Do.............

Hager pumping

plant. 

Spiring Creek .... ...

Do.............

Mott el canal........

Do.............

Dove Creek.. ......

Location.

Springs, 3 mites above 

Mertzon, 

Just below Seven

Springs, 3 miles above 

Mertzen.

MO feet below Merteon

canal diversion. 

1,500 feet below Mertzoti.

below return water.

road crossing.

ersly.

ing plant.

mouth.

Spring Creek.

diversion.

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

Ap« 

proximate distance 

(miles).

0

0

3

3

3.4

3.4

7

11

16

16

20

25

25

27

20

Date.

27

27

27

27

27

27.

27 ja

27

27

27

27

27

27

27

Discharge 

of main 

stream.

1 9

.0

.2

.5

1.6

I 9

2.1

.8

.8

Inflow..

.2

4.2

J&iTOtsiqa»,

9.3

'

0

\ - 8

5.9

Section 

gain or 

'lost.

4-8.0

 4

.0

+.3

+1.1

+1.1

+.2

+4*

.0

Total 

gain or 

loss*

+8.0

+7.4

 ;

+7.4

+7.7

+&8

+9.9

+10.1

+14.7

+147

PECAN BAYOU AT BROWJSTWOOD, TEX.

1JOCATION. ^Near pumping plant of city of Brownwood, 6(X) feet above lower dam, 

at City Park, 1 mile north of Brownwood/Brown County, 2 miles above moutbt <sf 

Adams Branch, and 30 miles above confluence with Colorado River.

DRAINAGE AREA. 1,560 square miles.

RECORDS AVAILABLE. May 24,1917, to June 30,1918, when station was discontinued?.

GAGE . Vertical staff in two sections attached to trees on right bank about 200 feet below 

pumping plant; read by C. N. Davis. From May 25 to June 3, 1917, readings 

were taken from an inclined and vertical staff gage located at right end of lower 

dam. This gage was destroyed June 4 and present gage installed June 8. 

Present gage referred to datum 1.04 feet lower than original one to avoid negative

DISCHARGE.MEASUREMENTS. Conditions will not allow measurements at low 

' but high and medium stage measurements can be made from upstream side of 

highway bridge 800 feet below lower city dam. ; 

AND CONTROL. Bed composed of mud and clay, free from vegetatlom; 

channel straight above and below station. Banks ara wooded, subject to overflow during extremely high stages. When stream is nearly bank-full there is 

likely to be flow through a slough which leaves the river a short distance above 

the gage and connects with Adams Branch. One channel at all stages ??kea 609 

is confined by banks of main stream. City dam 600 feet below gage serves as a 

control for stages when flow is confined within banks. Dam has opening of 140 

feet, crest regular. Location of control not known when banks are submerged.

68972 22 WSP 478 4
46 SURFACE WATEB SCPEL&, 1918, PABT VIII.

EXTREMES ov DISCHARGE. Maximum stage rec&rded during period of records, 4,40 

feet at 6 p. m. September 3, 1917 (discharge, 3,340 second-feet, determined by 

formula using the dam as a weir; possibly subject to considerable error); no flojw 

from June 13 to August 19, August 26 to September 2, and September 16-30,1917, 

October 1 to May 17, May 24 to June 1 and June 17-30, 1918.'

ICE. None reported.

DIVERSIOKS. The second report of the State Board of Water Engineers shows 590 

acres declared irrigated by use of 1,180 acre-feet of water diverted from Pecan 

Bayou above the station. This report also shows a storage of 2,000 acre-feet for 

waterworks by the city of Brownwood. During 1916 the city of Brownwood reported a consumption of 310 million gallons, which was pumped from the stream 

just above the station. Two pumping plants are operated below the control 

dam near Brownwood. but the quantity pumped is not knowa^. « ,"-'.

REGULATION. Flow at station regulated during normal flow by storage reservoir an,d 

pumping plants above. Two miles above the station the city of Brownwood feas 

constructed a dam to impound water for municipal use. Water is released from 

this reservoir when the supply is short in pond at the gage from which the city 

supply is pumped. Backwater from the lower dam extends to the upper dam.

RECORD OP FLOW. No flow October 1 to May 17, May 24 to June 1, June 17-30. 

Water ran over dam from May 18 to 23, and June 2 to 16. Station discontinued 

on June 30. Not sufficient information available to determine daily discharge.

Discharge measurements of Pecan Bayou at Brownwood, Tex., during the year ending,

Sept. 30, 1918.

[Made by E. P. Cougdon.]

Date.

Feb. 25

Aug. 8

height.

Ftet. 

0.0

JD

Discharge.

Sec.-ft. 

0

0

Daily gage height, in feet, of Pecan Bayou at Brownwood, Tex., for the year ending Sept. SO

1918.

Day.

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

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

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

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

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

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

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

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

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

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

May. June.

4.81

4.86

4.84

4 47

4.44

5.11

5.78

. 5.24

5.71

Day.

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

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

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

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

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

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

17

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

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

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

May.

10.99

June.

4.64

4.48

4.41

4.34

4.28

4.26

Day.

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

22

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

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

25.'.............

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

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

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

29

89..............

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

May.

4'. 28

June.

NOTE. No flow on days for which gage heights are not given except for period May 19 to 22 when gag* heights are missing.
SABA RIVEH AT M2NAHD, TBX. .... . ; |V . ...;,...;, u%;«,

LOCATION. At steel highway bridge in Menard, Menard County, about 80 miles

above mouth of stream. 

DRAINAGE ABBA. 1,140 square miles.

BECORDB AVAILABLE. September 14, 1915, to September 30, 1918. 

GAGE. Chain gage attached to floor on downstream side of highway bridget read

by H. A. Cannon.

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

CHANNEL AND CONTROL. Channel straight 800 feet above and 100 feet below station;

water flows through a series of shoals and ponds; channel,above gage somewhat

obstructed- by reeds and grass, but below gage only slightly obstructed at times.

Banks of gravel and day, wooded; the right sloping, high, and not subject to 

" overflow; the left1 low, and subject to overflow during high stages. A sand, and

gravel ford just below gage forms control dtiring low arid; medium stages; _ shifts

considerably. ; 

EXTREMES OP DISCHARGE. Maximum stage recorded during year^ 8.90 feet at 7*3<j

a. m. June 3 (difcharge not determined); no flow July 12-14 and 19-31; Augult

1-4 and 26-31. 

';' 1915-1918: Maximum stage recorded, 13.6 feet at 2.30 a. m. September 16j

1915 (discharge not-determined); no flow in 1918. 

" Ufa. None reported during year. : C 

DtVERsioNs. Considientblfe land is irrigated above station. Noygs canal diverts a

short distance above gage, and irrigates considerable area of lajad on right side

of river. Several pumping plants are above and below gage. The second report

of tiie State Board of Water Engineers shows 5,807 acres declared irrigated by

11,614 acre-feet of water annually in Schleicher and Menard counties; over hall

of this area is above the station. 

/ BBGTJLATTON. -Flow largely controlled at low stages during irrigation season by

diversion to Noyes canal.

ACCURACY, Stage-discharge relation not permanent. Hating curve fairly, well 

- defined below 90 second-feet. Determinations of discharge, atwve $0 second-feet

subject to considerable error. Gage read to hundredths twice daily; oftener

during high water. Daily discharge ascertained by shifting-control method.

Records fair for low and medium stages.

Dmkwrge measurements of San Saba River at Menard, Tex.t during the year ending

Sept. 30, 1918.

Date.

Ofeftt. 14

Feb. 24

Mar. 29

Made by 

A. K. Gow&ng.. ........

Gage 

height.

Feet. i ssa

2.05

2.17

2.18

Diseharge.

Sec.-ft. *1.0

23.7

31.9

21.7

Date.

May 22

July 12

Aug. 24

Made by 

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

A

Feet. 

1.87

1.45

1.47

Discharge.

Ste.Jt*

, 7,2

.0

, Vfl

'Estimated.

Discharge measurements of Noyes canal 0' at Menard, Tex,+ during the year ending

Sept. SO, 1918. ;-" - '

Date.

Oct. 14

Dec. 10

Feb. 24

Made by- Gage 

height.

Feet.

Discharge.

Sec.-ft. 

0.0

10.9

.0

Date.

May 22

July 12

Ann O.J

Made by 

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

Gage 

height.

Feet.

' Discharge.

See.jt. 

12.4

17.8

7.8

«See description of San Saba River at Meaard, Tex.
SUKFACE SUPPLY, 1&18, PABT VIII.

Daily discharge, in second-feet, bf San Saba River at* Mendr$, f Tex., for the year ending

, Sept. SO, 1918,

Day.

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

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

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

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

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

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

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

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

§..............

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

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

12.............. is:.............

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

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

»'... ...........

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

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

19... ..... .. 

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

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

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

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

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

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

26.............. 27..,...:.......

2g... ...........

2».. ............

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

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

Oct.

1.1

1.8

1.8

1.9

2.0

2.3

2,6

2.0 i it

1.7

1.6

1.5

1.4

1.1

1.1

1.3

1.4

1.4

1.4

1.8

1.8

i o

i 2

i it

t a

2

*

2.9

2.3

2.9

2.9

2.9

Nov.

3.5

4.1

4.1

4.4

4.4

5.0

4 A

5.0

7.1

7.1

as

8,5

0 9

Q a

0 9

o a

a Q

1111

9 Q

11

1211

13

10

14

. 16

99

19

19

Dec.

150

36

23

20

20

18

15

19

22

22

20

22

23

20

26

29

28

28

28

26*>a

OO

28

24

24

OQ

90

24

28

.26

Jan.

28

26

26

OQ

38

32

34

35

35

38

34«wi

4n

40

41

40

404n

on

21

is

14

10

*>A

' 19

14

14

10

14

14

on

Feb.

21

19

23

22

21

21

21

23

OQ

23

324e

43

40

40

38

%

4A

Aft

40

36

34

OO

on

Oft

30

 9O

30

Mar.

34

30

32

30

30

32

35

38

41

44

32

30

30

21

23

21

20

22

21

21

21

91

2£

23

23

24

24

93

22

20

10

Apr.

8.5

9.2

9.2

10 ' W

9.2

2.6

7.8

4.4

1.2

1.3

1.6

1.6

1 ft

130

26

26

2691

35

28 '28

26

IK

16

18

ta

.

May.

IS

16

73

121

91

32

24

24

22

22

19

19

18

18

14

. 16

16

15

15

18

15

11

9.2

8.5

9.2

7.8

9>2

9.9

8.5

8.5

Q Q

June.

9.9

11

60'

30

11

12

11

11

11

20

55

1.4

11

18

11

29

28

22

20

, 20

19

18

14

11

11

11

9.9

July.

11

4.4

2.9

2.6

2.3

2.6

3.6

L8i.r

.9

10

ii'6

4.7

1.7

.6

Aug.

1.3

13

18

16

14

13

Jl

12

I*

4.4

7.1

5.7

7.1

6.0

..8

.8

5.7

3.8

L4

.6

.8

Sept,

0,*

.8

.8

.9

2.0

«4

121

107

104

97

85

78

" 77 ,

72

70

65

62

55

48

40

32

2£

%

20

20

20

20

20

20

20

NOTE. Discharge interpolated or estimated Feb. 12 and 21-33; Mar. 8-10; Aug. 24, and . On Apr. 15*17, and fane 3*5 discharge beyond limits of rating curve; gage heights were as folwws: 1.4 

feet,6.64 feet, 3.78 feet, S.40 feet, 5.49 feet, and 3.SO feet, respectively. During periods of no ftps*at gage 

{July 12-14,19-31, and Aug. 1-4) entire flow of river was diverted into Noyes canal.

Monthly discharge of San Saba River at Menard, T$». t fw ike year ending &ept. SO, 1918.

Month.

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

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

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

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

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

March.. ..I.... ............................. . . .........

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

2.9 

22 

36 

41 

40 

44

121

15 

19 

121

Minimum.

1.1 

3.5 

15 

13 

19 

10 

1.2 

7.8 

1.4 

.0 

.0 

.8

Mean.

1.8S 

9.81 

23.7 

27.1 

30.2 

26.5,

 2i2

L83 

5.18 

47.2

Run-off" 

in acrefeet.

1W

ISM 

1,460

...... ..^

113 

319 

, \®$
CO&GBADO

SAW SABA KIVER NEAR SAN SABA, TEX.

LOCATION. 200 feet above Beveridge highway bridge, 1 mile below mouth of China 

Greek, 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.

BUCOBDS AVAILABLE. December 30,1904, to December 31,1906; September 11,1915, 

to September 30,1918. Miscellaneous discharge measurement^ previous to 1804.

GAGE. Vertical and inclined staff, on right bank; read by G_ M. Pool. From December 30,1904, to December 31,1906, gage heights were obtained by measuring with 

a tape from a reference point on the bridge to the water surface. Relation between 

: datums of the two gages unknown.

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, clay, 

wooded, high, and not subject to overflow; right bank composed of clay and grave}, 

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 is fairly permanent during low and

EXTREMES OF DISCHARGE .-^Maximum stage recorded during year, 28.5 feet 1.30 a. m. 

June 3 (discharge, 10,ft&0 second-feet); no flow July 6, 27^ August 9, and 10. 

1904-1906; 1915-1918: Maximum stage recorded, 31.7 feet August 7, 1906 (discharge not determined); no flow during 1918, as shown above.

ICE. None-reported during year. j.

DIVERSIONS. Considerable water is diverted or pumped from the stream and tributaries above and below station. The second report of the State Board of Water 

Engineers shows approximately 11,000 acres of land declared irrigated, and approximately 23,000 acre-feet of water used each year from San Saba River. A 

' large part Of this water is diverted above the station, flood water from 3rady 

Creek at Brady is stored for municipal uses; capacity of reservoir not known but 

probably smaJL City of Menard uses small amount for waterworks.

REGULATION. None.

A.CCURACY. Stage-discharge relation fairly permanent during low and medium stages. 

.Rating cu*ve well defined between 5 and 6,900 second-feet. Two rating tables 

used, one October 12 to December 17, and one December 18 to September 30. 

Gage read to hundtedths twice daily; oftener during floods. Daily discharge 

ascertained by applying mean daily gage height to rating table except for periods 

of shifting control. Records good above 5 second-feet.

High-water discharge measurements of October, 1918., permit the determination of 

Idischarge omitted from previous publications: September 16 and 17, 1915, 4,150 ajtji 

6,020 second-feet, respectively; ijf

mewwtmtnts of San Sa&a Mv$r near Son Sofa, Tex,,. 

Sept. SO, 1918.

iV»;,.r;

Date.

Oct. 15 B«Sc. 8

Feb. 27

Mar. 30

i «. 

Made by 

"- . ,. .'! '.( j .: j

E. P.Congdon......... n.J.Mtaik.. ..........

A

Feet. 

1 19

1.36

L49

1.30

IMScharge.

8ec.jt. 

27.3

38.5

46.6

33

Bate.

May 20

July 13

Aug. 25

Madeby=^

i. , "- -: :' v.a

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

.Gage 

tKSsbt. (TUT.

Feet. 

1.42

.81

1.10

' Discharge,

Secji. 

36.4

,6.9

13.1
|>0 &TJBFACE.WATIEE SUPPLY, 1918, PAST VIII.

Daily discharge, in second-feet, of-San Sab® River near San Sabsf, Tex.,for the year enMny

Sept. 30,1918.

Day.

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

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

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

"5.. ............

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

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

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

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

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

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

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

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

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

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

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

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

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

19.....:........

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

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

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

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

24.............. 26....:.........

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

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

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

29 .

so...........:..

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

Oct.

25

26

26

24

22

' '24

24

25

25

27

28

28

27

29

29

'29

29.

29

W

27

28

29

29

28

29

29

30

30

29

28

30

Nov.

30

30

01

31

s Ql

30

35

33

33

34

34

33

83

34

35

36

41

40

' 41

40

38

37

37

44

46

48

44

 116

63

50

Dec.

41

40

An

39

OQ

39

42

39

40

45

42

46

1 46

45

45

43

43

45

45

46

44

43

43

45

45

43

43

45

47

45

47

Jan.

47

47

47

47

 '' 48

47

46

47

50

50

66

69

63

§4

64

62

 60-

17

57

57

62

48

43

43

43

40

40

<ao

36

36

36

Feb.

38

35

34

36

07

36

3d

40

38

38

40

42

39

42

40

3638

44 44

44

44

44

44

M

50

48

47

46

Mar.

40

38

AQ

47

9A

40

46

42

42

40

32

33

31

34

37

33

37

34

32

25

64

32

36

39

35

31

33

00

3d

38

42

Apr.

34

32

^1

29

64

730

83

45

34

29

28

26

29

2,990

3, 400

1.130

1:160

387.

220

146

111

88

78

7P

66

55

48

52

43

42

May.

36

34

38

46

51

66

100

114

83

63

59

838

703

13683 '

63

5647-

43

36

82

27

22

21

15

19

19

13

10

8.2

6.8

June.

7.3

366

4 41ft

4' 130

1^090'

412

232

160

188

98

77

68

59

5551"

' 68

164

104,

63

52

34

285

142

.70.

42

27

27

22

19

18

My.

12

5.8

5.2

5.1

» 2.4?

.0

j5.-S

6.8 5,'6

5.8

6.0

5.2

6.0

H.2

12

8.5

S.4

5.4,

5.5

5.3

10

. 8.8

5.8

4.9

4 0

1.4.0-

a 4

10

5; 5

4.1

Aug.

13

7.6

6.0

0 7

8 12

6.0

- r-4-6

2.1

.0

.0

2.3

8.8 4'. 8

4.9

1.5

5.3

6.4

9.4

9.1

.13 ,

6.9

, 0 $

8\8

7 a

14

17 ' 12

-10

11

12

11 .

13ept.

27'St'1

T.|

& '

' 12

, 16

15

12

 Jit

- -13 »

16

 15

14 " 15

13

10

12

15

16

1ft

1&

' 17

16

16

is

17

15,

17

18

NOTE. Discharge determined by shifting-control method, Oct. 6 to Dec. 8 imd Mar. 9 to Apr. 5. Otie 

rating table used, Oct. 1 to Dec. 17; new rating table used, Dec. 18 to Sept. 30.

Monthly discharge of San Saba River near San Saba, Tex., for the year ending,Sept. SO,

1918. . ' -

Month.

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

March

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

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

Discharge in second-feet -

Maximum.

30 

116 

47 

69 

56 

64 

3,490 

838 

, 4,430

17

27

4,430

Mlnimmr}

22 

30 

3836 " '

m

6.8 

7.3 

.0 

.0 

7.3

.0

.Mean.

27.4 

40.3 

43.2

50,3

37.8

m

93.2

417 

6.02 

7.74 

14.4

957

- Run-off 

acre-feet.

2*400

478

8&7

69,300 1,.£

NOTE. Discharge for Sept. 16 and 17, 1915, omitted from previous publications, is given cm th« 

preceding page. ,
OOIX>BADO BIVEB BASIN.

SAN SABA SEEPA«UB

The seepage investigation on San Saba River was carried on from Match 29 to 31.- 

FiteM McKavett Springs to the Rector dam aad canal at San,Sab», Tex., matiural conditions were found. Below the Rector dam & correction should be applied, but owing 

to lack of sufficient dajta this correction was not made. Results below the Rector data 

are therefore doubtful. In the Fort McKavett-Menard Valley there was a gfcia of $4 

second-feet, and in the San Saba Valley a gain of 12 second-feet up to the Eector dam, 

i Between these two valleys the stream is confined largely to wide, deep egm^QMS, 

Measurements at the beginning and end of this stretch show that there was a slight 

gain. :

Seepage measurements, in.second-feet, on San Saba River from Fort Mcgayett, Springs, 

above Menard, Tex., to the mouth, in March, 1918-

Stream or diversion

San Saba River

San Saba River...

plant.

-pumpingplant. 

Los Moras Creek. . .

lag plant.

Do.............

Do.............

Brady Creek.......

San Saba River....

let.

A. 3. Harkey

pumping plant. 

Qunter Bros.

pumpingplant.

pumping plant. 

San Saba River....

Mill Creek.. ........

ing plant.

Do...............

Location.

vett Springs.

Month.. . :,»., ..,..;..

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

Clear Creek.

Clear Creek.

Mouth.................

ing.

road crossing.

Brady Creek. 

Mouth..................

Doran's ranch.

crossing. 

Mouth.................:

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

road bridge. 

Half a mile below rait

road.

San Saba. 

If miles northwest of

San Saba.

ofMffi Creek.

version.

low mouth of Mill 

Creek.

Mill Creek.

Mouth..................

Ap-. proximate: distance 

(miles).

0

10

13

13.8

14

18.5

20.5

21

26

31

41

56

76

76

81

83

87

90

91

92

92 1

94

95

97.5

97.6

98

no Q

QQ

104

105

Date.

29

29

9O

9O

29

29

29

90

3ft

30

30

30

30

30

30

30

<m

<m

30

30

30

30

30

30

31

30

30

30

31

31

Discharge 

of mam 

stream

, 8.6

26.7

21.7

30.9

28.0

34.9

34.0

33.0

32.5

55.4

28.0

23.0

i , 

Innow

0.5

n o

,8

1.7

4.7

.0

.0

.0

22.9

jDiver*

sion.

5.2

2.6

4.4

2.4

3.4

2.2

Li

2.6

1.8

-- ,, ,-yT

Seettap 

gam'*^ 

 loss.

 H-5.7

+ 2.0

+ 16.0

- 2.*

+ 6.9

- 2.6

+ 1.0

+ 2.0

.0

-80.6

.0

Total fftiaw

 .low.;;:

+5.7

'' +7.

 4-23.7

H-20.8

4-27.7

4-25.1

f

4-26.1

4-28.1

4-28.1

 2.8

- su
SURFACE WATER'SUPPLY, 1818^ PABT VIII.

WORTH LLAWO K1VBB, JTTWOTIOW, T1X,

LOCATION. 500 feet above remains of old Wilson dam, 1 mile below mouth of Bear 

Creek, 2§ miles above North Llano highway bridge, 3 miles northwest of Junction, 

Kimble County, and 4 miles above confluence with South Llano River.

DRAINAGE ABBA. 803 square miles.

RECORDS AVAILABLE. September 14, 1915, to September 30, 1918.

GAGE. -Cantilever chain gage on left bank; read by J. L. Sparkman. £

DISCHARGE MEASUREMENTS. Made by wading or from highway bridge 2J miles 

> below station, . .

CHANNEL AND CONTROL. Bed composed of solid rock; clean and permanent. Chaan»l 

straight for 400 feet above and below gage, 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 having 2 feet vertical fall at 

site of old dam forms a permanent control for medium and low stages. Growth of 

mass on control affects gage heights during low stages.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 15.2 feet at 7 a. m. 

April 15 (discharge not determined); no flow October 1-24, 26-31, November 1 to 

December 18, July 9-13, July 17 to September 4.

1915-1918: Maximum stage recorded, 18.00 feet during night of September 15r 

1915 (discharge not determined); no flow during periods of 1917 and 1918.

IOE. None reported during year.

DIVERSIONS. No huge irrigated areas above or below station.

REGULATION. No indication that flow at station is regulated.

ACCURACY. Stage-discharge relation permanent during low and medium stages 

except when affected by growth of mass. Rating curve well defined below 10ft 

second-feet, but poorly defined above that point. Gage read to hundredths twice 

daily; oftener during high water. Daily discharge ascertained by applying mean 

daily gage heights to rating table and by shifting-control method. Records 'good 

for medium and low stages but subject to considerable error at high stages.

Discharge measurements of North Llano River near Junction, Tex., during the year

ending Sept. SO, 1918.

Date.

Oct. 14 Dec 10

Fob 24

Made by 

CoHg&m atid Cowans . .

Ga.'oe

Feet. 

0.35

1.23

Discharge.

Sec.-/*. 

0.0

.0

7.6

Date.

Apr. 1

July 11

Made by 

A. K. Gowans... ... ...

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

A

Feet. 

1.18

Discharge.

Secrft. 

£.2

.0
BASIN.

Daily discharge, in second-feet, of North Lfano Rwer near function, Tea;., for the year

. ending Sept. SO, 1918.

r Day.

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

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

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

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

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

....................

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

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

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

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

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

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

I?..... ..............

Mii,«.... ...........

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

16,,.,., .............

n..........;.. ......

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

1ft................

20. .

2S

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

23 .. .

....................

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

26

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

as

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

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

81...................

Get.

o.&

rx».

1.6

2.3

2.3

2.3 ^ o

J5.1

5.1

5.1

6.6

5.7

5.7

5.1

5.7

Jan.

6.0

6.0

6.0

6.0

7.8

7.8

7 S

5.7.

5.7

5.1

5.7

6.7

6.6

6.0

7.2

7.2

6.0

6.0

6.0

6.0

7.2

7.2

'5.77.2

5.7

6.6

6.6

6.6

6.6

5.7

5.7

Feb.

5.1

5.1

5.7

6.0

6.0

6,0

6,0

6.0

6.0

7.2

7.2

7.2

7.2

5.7

5.7

5.7

6.6

6.6

6.6

6.6

6.6

6.6

6.6

7.2

7.2

7.2

7 8

7 &

Mar.

0.0

9.6

0.6

o ft

.9.0

9.0

ao

6.6

6.6

6.6

6.6

6.6

6.6

6.0

6.6

6.6

6.0

6.0

6.0

6.0

5.7

5.7

5.7

5.1

5.1

5.1

5.1

5.1

12

«.o

6.0

Apr.

5.1

4.5

454'5

14

7.8

5.7

5.4

45

45

45

45

45

45

3,860

840

131

73

49

25

23

21

19

IS

17

17

14

14

13

13

Hair.

13

13

14

03

16

15

14

14

13

13

IS

13

13

11

11

11

11

1Q

10

9.0

9.0

7.2

7.2

' 7.2

6.6

6.6

5.7

5.1

5.1

45

45

Jane.

45

4.5

142

14

5.7

4.5

1,080

30

19

16

14

7.8

6.6

5.7

6.6

6.6

5.7

5,7

5.4

46

45

2.8

2.5

2.5

2.3

1.7

1.6

1.5

1.5

1.5

Juii*

1,4 1:3 1.8-

1.0

.0

.9

.6

.7

13 ,

2,5

.5

S?»pt.

f . ;

189

77

11 .

45

3.7 3»ft

L6

1.5

' 1.5

1.4

1.4

1.4

1.3

l.S

1.3

1.8

1.5

1.5

1.5

1.4

1.4

La

1.2

1.2

1.2

1.3

NOTE. Discharge determined by shifting-control method, Jan. 4 to Sept. 30; discharge Apr. 15-16 and 

Jane 7, obtained by extension of rating curve and subject to considerable error. Ho flow on flays for which 

no discharge is given.

Monthly discharge of North Llano River near Junction, Tex.,for the year ending Sept. SO, 

' 1918.

Month.

October.. .............. ................I.... .............

December.... _ ........................................

Jftniianr

February... _ . _ ......... _ .............:............

March..:........... .................... ........u........

April..................................................... May.... ..... ...... . ....

Anjcost * *

September

' The year. .. .... ..

Discharge in second-feet.

Maximum.

as

.0 

6.6 

7.8 

7.6 

12 

3,860 

93 

1.050 

1& 

.0 

180

3,860

Minimum.

0.0 

.0; 

.0 

5.1 &;1 

5.1 

45 

4.5 

1.5 

,0 

.0 

.0

.0

Mean.

0.02 

.00 

1.82 

6.36 

6.51 

6.89 

174 

12.9 

48.0 

. ,.78 

.00 

10.2

21.9

Baa-off in acre-feet.

1 

.0 

112 

391

 862" 

424 

10,400 

793 

2,740 

*8rO 

.0 

607

15,900
54 SURFACE WATER SUPPLY, .4993-, PAKT VIII.

LLANO EIVEE. NEAR jrTWOTIOW, TXX,

LOCATION. 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, 3J miles east of Junction, Kimble County, and 4 miles above creek entering river from south. -

DRAINAGE AREA. 1,700 square miles.

RECORDS AVAILABLE. September 13, 1915, to September 30, 1918.

GAGE. Vertical staff, 0 to 7.5 feet, attached to tree on right bank, and inclined staff, 

7.6 to 19.5 feet, several feet upstream; read by Miss Sadie Oliver.

DISCHARGE MEASUREMENTS. Made by wading at Mason road crossing a quarter of a 

mile above gage or from cable 400 feet above station.

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 watery 

right bank clean, high, and" not subject to overflow. One channel 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; this condition occurs only at intervals 

of 10. to 15 years and will not greatly affect results. Rock ledge about 75 feet 

below gage, having a fall of 3 feet, serves as permanent control for low and medium

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 10.5 feet during, 

night of April 14 (discharge not determined); minimum stage, 1.32 feet August 

23-28 (discharge, 13 second-feet).

191S-1918: Maximum stage recorded, 26.3 feet at 3 a. m. September 16, '1915 

(discharge not determined); minimum stage occurred in 1918.

ICE. None reported during year.

DIVERSIONS. The second report of the State Board of Water Engineers shows 4,741 

acres of land above the station declared irrigated, requiring 9,482 acre-feet of 

water annually from Llano River and tributaries. A large part of this land is in 

the vicinity of Junction, near the confluence of North Llano and South Llano 

rivers. A declared use of 500 second-feet for power by the Junction Gin & Watel 

Co. is also shown.

REGULATION. No apparent regulation of the flow at this point.

ACCURACY. Stage-discharge relation practically permanent. Rating curve well 

defined between 20 and 300 second-feet. Gage read to hundred ths once daily; 

oftener during high water. Daily discharge ascertained by applying mean daily 

gage heights to rating table. Records excellent for medium and low stages; poor

above 400 second-feet. . , ,

i ,

Discharge measurements of Llano River near Junction, Tex., during the year

Sept. 30, 1918. . . . . .

Date.

Oct. 13

Dec. 11

Feb. 23

Made by- Gage 

height.

Feet. 

1.43

1.46 1 44

Discharge.

8ec.-fL 

38.2

52.3

tf) R

 Date.

Apr. 1

July 11

Made by 

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

Gage 

Height.

F&t. 

1.46

1.37

D&- > 

charge.

9ee.-ft. 

42.6

2ft.*
'COLORADO BtVEK BASEST. 55

Daily di&eh<&ge, in second-feet, of Llano Rivvr fcear Junction,

Sept. SO, 19U. , .

D»y.

1....... ....... a...........;..

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

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

§..... .........

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

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

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

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

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

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

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

13-i.U..........

14,..'...........

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

1&..'.'.'... .......

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

18..,.,........,

M-... ............

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

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

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

33

«.:.....'.....:.

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

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

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

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

».»... ..........

30>...... .......

81....... ...j...

Oct.

43

43

43

43

38

38

HA

34

34

34

34

34

?IA

QO

36

36

41

oa

36

36

Oft

Oft

41

41

41

41

41

41

41

41

41

Nov.

41

41

41

41

41

41

41

45,

xe

45

is

41

41

41

41

41

41

41

41*

41

41

41

41

41

4t

" 41

41

38

38 

38

Dfee.

38

41

41

A1

45

4545-

45

45

45

41

41

41 41

41

' 41

41

41

41

41

41

41

, 41

 41'

. 41

41

41

41

41 

41

41

Jan.

41

41

41

41

41

41

41

41

41

41

41

41

- 45

45<i<>

45

AK

45

AK

AK

41

41

41

41

41

41

41

41

41 

41

41

Feb.

41

41

41

41

41

41

41

41

41

41

41

41

AK

AK

45

i>;

45

41

41

41

41

41

41

45

45

AK

AC

45

Mar.

45

AK

45

45

45

&t.

.i45

45

45

45

 .45

<t<;

45

4fi

45

i<>

 41

41

; 4!

41

41

41

41

41

41

41

41

41 56

45ii

Apr.

41 41

41

41

41

41

41

45

AB;

45

45

45

45

1,010

2,100

710

325

249

184

160

144

144

144

 112

105

105

82

82

69 

68

« *.

69

144

224

240

224

200

144

144

144

144

144

136

-13ft

128

1*8

128

128

 128

120

105

45

45

45

46

,45

41

41

41

45 

45

45

Jtme<.

45

45

«50

232

144

41

152

82

76

50

45

32

32

36

36

36

32

32

'240.

152

76

50

45 45

41

- 41

41

41

41 

41

July.

36

82

32

27

27

27

24

24

24

24

24

24

. 24 -22

22

20

20

20

20

20

24

' 2422

' 24

24

20

22

22

20 

20

20

Asf.v

20

20

20

20

20

*

20

20

22

22

24

24

24

24

24

24

24

24

24

24

' - '24

20

17

13

13

13

13

13

13

17 

20

20

Septi

20

20

20

82

105

361

50

32

32

27

32

32

32

38

32

32

, 32

32

36

m

36

36

36

38

36

36

36

36

OD

36

NOTBJ Apr. 14 and 15 discharge determined by extension of rating curve. 

Monthly discharge of Llano River near Junction, Tex., for the year ending Sept. 30, 1918.

Month.

October ........................ ^ .......:........,..... '. ..

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

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

March...............................;....................

April......;.......,......................................

Matr

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

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

Th« year... ......,,.,,.................,........:...

Discharge in second-feet.

Maximum.

43 

45 

48 

45 

45 

56 

2,'190 

240 

«60. 

36 

24 

361

2,100

Minimum.

 ' - 82 

38 

.38 

... 41 

41 

41 

41 

, 41 

32

.1 <-: , 2ft

.18 

29

13

Mean.

38.1 

41.2 

41,8 

42.0 

.42.4 

. 43.8 

212 

111 88. T' 

. 23.7. 

20.0 

47.9

82.5

Run-oflin 

acre-feet.

2,340

2,450 2,870

2,580 

2,350 

2,890 

1%,W 

6,820 

, 5,280 

1,460 

1,230 2,m

46*2QD

ZXJJTO RIVER SIEPAOB IN¥BSTieATIOH. . . '.

The investigation of seepage in the Llano Biver basin included the South Llano 

and Hie main stream from Junction, Tex., to the confluence with the Colorado. From 

the mouth of Big Paint Creek to the eonfluenjCe with tfee North JAwac there w»a practically no gain or loss in the South Llano. In Llano River from the gaging station near 

Junction, Tex., to Beaver Creek there was a loss of 10 second-feet; from Beaver Creek 

to Little Llano Biver there was a gain of 28 second-feet; and a loss of 7 second-feet 

from Little Llano Biver to the confluence with the Colorado, with a net gain of il
56 SUBFACE WATOR PAST

second-feet from the junction of North and South Llano rivers to the confluence with 

Colorado River, a distance of 105 miles.

Data were insufficient to warrant a correction of discharge for time interval, but 

prior to and during the period of each investigation the stage was practically permanent 

so that a correction for time interval was generally not necessary.

Seepage measurements? in second-feet, on South Llano River from Telegraph, Tex., to 

confluence mth North Llano River at Junction, Tex., in April, 1918.-

Stream or diversion.

Big Paint Creek....

South Llano River.

Theo. Hunger diversion...........

Llano Land & Irrigation Co.'s diversion...........

Cedar Creek........

South Llano River.

Location.

Mouth..................

1J miles above Telegraph

2 miles below Telegraph .

6 miles above Junction . . Mouth..................

Just above mouth of

North Llano River.

proximate distance in 

miles.

0

.5

4

13

18.5

19

Date.

,1

1

1

1

1

Discharge 

of maw 

stream.

348

29.2

Inflow.

23.1

,1.0

Diyersjon.

1.9

7.0

Section 

gain or 

loss.

+2.3

Total 

gain«r 

lose.

+2.8

Seepage measurements, in second-feet, on Llano River from Jwn&wn, Tex., to 

at Kingslandi Tex., Jtforcfe SI to April S, 1918.

Stream or diversion

plant.

top plant.

J.W. White (Damtown) diversion.

Do.............

Tfcn

l&aaoRlvieT........

wm«»r!rarfc.i .;...-.

awi*p*k.'*.- .r;.

Location.

River.

Johnson Pork.

Fork. 

Mouth..................

Johnson Fork.

Damtown.

Mdath. .................

lames River. 

Mwith. ........ .........

Beaver Cre«k. 

MtfQth.. ................

An

Ca8teU........v.........

Mouth..................

ler Creek. Mouth:. ................. .....doi.4,...^...,^.,.. .. ..4o..t. ..........,.:.

ApJi proximate distance in 

miles.

0

0

3

6.2

6.5

7

7

19.5

20

35ia

43

51

54

545

55.5

64

72.5

73.5

81.8

»<..-:

90.5

93

' 92

lft ?.

Date.

1

1

1

2

2

2

2

2

2

2

3

3

3

3

3

3

3

3

3

31

n"3ti.

31

3jL

I1

', -IL

Discharge 

of main 

stream

29.2

42.6

47.9

42.5

40.2

42.3

V7 A.

45.3

50.8

56.4

: ftkTS-j

65.7

4 "MT

Inflow

1.8

7.5

.5

.0

.5

.0

.0

i

.0

 ...a:

'.t < -

 L.^_^L

Diversion.

0.5

.8

1.8

,''",""",

, ,. ,

Section 

gain or 

loss.

+11.6

- .9

- 3.6

- 2.3;

+ 1.6

- 4.0

+ =7,4

+ 6.*

+ 5.6

+ i.3

 .. *»:

'Z-ffii

- - -u v

Totai 

gainer 

loss.

+13,9

+13.0

Va* ' ' *

,+,74 ""-:

+ &? ? -" 

"+'P

' " , - 'E

+11.2

+W.7

+22.3 , .

+31.6 ^

+&1.6 v ^

- . ' * -" 'fff

"+*»& ,;~
BASOT. 57

BAHTOW CREEK AT AUSTOT, TXX. . ,.., . ,,*,.,;,; ..^'.T--,

LOCATION. 200 feet below Barton Springs, 1,100 feet above Bee Cave highway bri*%©, 

half a mile above mouth, and half a mile southwest of Austin, Travis County

AREA. -Indetermimate. Normal flew of stream comes from Barton Spriags; 

drainage area of stream not appHcable. ,

AVAILABLE. April 25, 1917, to September 90, 19%8. 5CsceBaae0B»^ y«- 

charge measurements from 1894 to 1906, and during 1916 and 1917.

GAGE. Vertical staff, two sections, reading from 0 to 10.1 feet and 10.2 to 20.3 feet, 

attached to large tree on left bank; read by M. L, Farquhar. April 25 to May 

23, 1917, vertical staff gage located 300 feet downstream. Relation between 

datums not known.

DISCHARGE MEASUREMENTS. Made by wading about 800 feet below gage.

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

and not subject'to overflow. One channel at all stages; composed of rock, gravel, 

and sand. Shoal just below gage forms control during ordinary flow, 1?ut growth, 

of weeds in channel affects stage-discharge relation. Floods of Colorado River 

cause backwater at station.

BXTREMES OF DISCHARGE . Maximum mean daily flow during year, April 20-21 

(discharge, 24 second-feet, or 12,900,000 gallons per day); minimum mean, daily 

flow, February 25 (discharge, 12 second-feet, or 7,760,000 gallons per day).

, 1894-1906 and 1916-4918: Maximum flow recorded August 31,1900, and June, 

1903 (discharge^ 69 second-feet, or 44,600,000 gallons per day);; minimum flow 

occurred in 1918.

ICE. None reported.

DIVERSIONS. None reported above or below station.

REGULATION. -Flow not affected by water-power plants or cpntroUing works. Discharge of Barton Springs governs flow during normal conditions. Flow is perennial at station, but from a point 3 miles northeast of Oak Hill to Barton Springs 

the flow occurs only after heavy precipitation. ., . . >

ACCURACY. Stage-discharge relation affected by growth of weeds in channel. Daily 

discharge determined by interpolation between discharge measurements. Gage 

read to hundredth^ twice daily, October 1 to March 31. Frequent discharge 

measurements increase accuracy of estimates. Records good.

Di&charge measurements of Barton Creek at Austin, Tex., during- the year ending Sept:

SO, 1918. "- "

Bate.

Oct. 6

26 

Vttfr. 16

Dec. 1 

19 

Jan. 2

Feb. 4

23

26

27 Mar. 7

16

Apr. 4

20 

May 4

Made by 

Gowans and Congdon. .

Congdon sttd Gowans. . 

Haflkand Gowans. ....

T*., /, Ttsfi^c , . . ,

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

Congdon and Gowans . .

Gage 

height.

feet. 

1.49

1.47 

1.49

1.47 

1.45

1.47

1.51

L53

1.54

1.52

1.54

1.55

1.66

1.64 

1.62

Discharge.

Sec.-ft. 

16.4

12.9 

15.6

14.0 

14.2

12.7

13.8

to 9

12.1

13.8

13.4

12.6

16.7

23.8 

19.7

Date.

May 20

June 5 

22

July 2 

. 18 

29

31

Aug. 1

10

16

27

Sept. 11

20

30

Made by -

C. E. McCashta.

CongdoriandMcCasMn. 

cTHMcGashin,....-....

Gowans and Congdon. . McCashinand Gowans, 

jffank and KfaiJswi, . . ,

C. E.MeCasbia., ......

H. B. Kinnison........

Gowans snd Congdon. .

&,

. Feet. 

. 1.66

1.73 

1.78

1.76 

. IvtSS 

1.66

1.71

1.70

1.72

1.71

1.73

1.75

1.78

1.80

Dischasge.

8ee.W to 4

13.3 

10. f

15.5 

- 14.7 

13.3

14. 1

14.0

14.3

14.6

13.0

12.7

14.0

12.7
58 SURFACE WATER SUPPLY, *1918r PAST VIII.

Daily discharge, in second-fM, o/JJsrfcm Greek at"Austin,- Iks.,/or

£0, 1918.

Day.

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

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

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

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

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

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

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

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

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

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

11..........^...

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

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

UL». ..........

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

30............. n..............

Oct.

17

17

17

16

16

19

16

16

16

,16

16

15in

15in

15

15

14

14

14

14

14

13

1311

13

13

13

13

NOY.

14

14

14

14

14

in

, 15

15

15

15

16

16

16

16

16

16

16

16

16

16

15

1&

 15

15

15

14

14

14

14

14

D«c,

14

14

14

H

14

14

14

14

14

U

14

14

14

H

14

14

14

14

14

14

14

14.

14

14

14

13 iq

13

13

13

13

Jan.

10

13

,11

19

13

13

18

13

11

1Q

43

11

13

f Q

-to

13

13

 13

13

13

13

13

13

13

13

13

13

13

13

14

14

Feb.

. 14

14

14

14

14

14

14

14

14

14

"U

14

14

14

14

14

14

13

13

11

13

10

13

13

12

13

14

14

Mar.

14

14

14

14

14

14

1O

13

1311

to

13

13

10

 lo

13

13

1Q

13

13

13

13

13

13

13

15

15

15

15

16

16

Apr,..

17

17

17

17is

ts

|o

19

19

20

20 ' 20

21

91

22

22

23

23

24

24

23

123

23

22

22

22

22

22

21

May,,

21

21

20

20

20

20

20

20

20

20

2010

10

10

19

10

1910

10

is

. 18

18

17

17

17

16

16

16

15

15

June.

15

14

1411

18

is

14

14

14

14

15

16

15

15

15

16

16

16

16

16

17

17

17

17

17

17

16

16

16

16

July.

16

18

1A

16

16

1ft

16

16

1 A

15

15

1615'

15

15

15

15

15

15

15

,15

14

14

14

14

14

13

13

14

14

Aug.

w14

14

14

14

14

14

14

14

14

14

14 V141 ;

15, '15

15

11

IS

IS

.;, IS

 14

1414'

14

14

14

13

1311

13

13

Sept.;

18

' 13

13iais

1311

13

13

1«!

to

13

13

13

13

14

14

14

M

. 14

:. 14

 14

14

14

14

19

13

18

13

13

Monthly discharge of Barton Creek at AnsiAn, Tex., for the year ending Sept. 30, 1918.

Month.

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

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

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

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

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

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

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

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

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

Discharge in second-feet.

Maximum.

17 

16 

14 

14 

14 

16 

24 

21 

17 

16 

15 

14

24

Minimum.

13 

14 

13 

13 

12 

13 

17 

16 

13 

13 

13 

13

12

Mean.

14.5 

15.0 

13.8 

13.1 

13.6 

13.6 

20.6 

I&8 

15.3 

15.0 

, 14.1, 

13.3

. 15.1

Ru^-off 

to acrefeet.

916 

883 

849 

805 

765 

836 

1.230 

1,140 

010

3 W>

10,900
-W^TEB SU**CY# 19L8, PAST VllL 09 

B1VBB BASIN. - ^v-,A\, .y.^,

OUAItALUPE RIVER NEAR COMFORT, TEX.

C5omfort-Kerm^le road 100 feet upstream from Boerner Crossiag, and 

 3| miles west of Comfort, Kjerr County.

(pfeAiNAGfi! AREA. 909 square Bailee. .- '

RECORDS AVAILABLE. December 16, 1917, to September 30, 1918.

GAGE. Vertical staff in two sections oa lejft bank; read by Christoph Flach.

DISCHARGE MEASUREMENTS. Ijtade by wading; no provision has been made for 

making high-water measurements.

CHANNEL AND CONTROL. Bed composed of rock, and forms permanent control. Left 

batik composed of clay, slightly wooded, and not subject to overflow. Right 

bank low, wooded) and subject to overflow. Stage-discharge relation affected 

by moss and weeds during Jow water.

EXTREMES OF DISCHARGE. Maptimum stage recorded during year, 17.5 feet during 

night of April 5 (discharge aot determined): minimum stage, 0.87 foot (discharge, 

- 0.6 second-foot). . j

ICE. None reported. j "

DIVERSIONS. There are some bumping plants about 7 miles above statibn.,, Th© 

second report of the State Board of Water Engineers shows total of 575 acre-feet 

of [water appropriated, but (inly very small amount of land irrigated.

REGULATION. The Kerrville aijid Center Point mill dams have only slight effect on 

the flow. ; 

ACCURACY. Stage-discharge relation permanent except when affected by growth of 

z weeds during low water. Rating curve well denned below 200 second-feet, 

, : Gage read to hundredths once daily except on Sundays. Daily discharge ascertained by applying gage heights to rating table and by shifting-control- method. 

Discharge above 200 second-feet subject to error. Records fair.

Discharge measurements o/Guadalupe River near Comfort, Tex., during the year ending

Sept. 30, 1918.

Date.

Dec. 16

Jan. 8

Mar. 2

May 1

June 11

Made by 

E.J. Hank.;...........

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

C. E.McCasMn........

Gage

height.

Feet. 

L56

1.59

1.49

1.58

1.09

Discharge.

Sec.-ft. 

27.5

28.5

22.2

43.5

7.1

Date.

July 11

Aug. 2

6.

Sept. 19

20

Made by 

A. K. Gowans: ........

Ga*e 

height.

Feet. 

0.90

.80

.87

1.20

2.3S

Discharge.

8ee.-ft. 

1.8

.4

.7

12.0

166
gUBFAGE WATER ' , 1918, PAB£ ¥111.

Daily discharge, in second-feet) o/Gwdalupe Siver ngar Comfort, Tex., for the year ending Sept. SO, 1918.

Day.

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

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

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

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

5.;.................

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

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

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

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

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

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

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

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

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

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

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

18

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

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

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

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

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

34

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

86...................

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

3»... ................

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

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

««

Dec.

28

28

31

34

31

30

97

27

27

30

30

30

30

30

30

30

Jan.

30

30

30

30

30

30

30

30

34

34

34

34

36

14

37

36

36

14

33

32

30

30

30

an

30

on

25

21

34

21

22

Feb.

30

30

26

22

23

24

24

26

30

29

28

28

26

30

27

29

30

30

30

30

33

31

30

30

28

24

25

24

Mar.

24

22

20

10

as

25

23

23

23

21

19

2020

20

22

21

20

21

21

22

22

91

90

22

21

Of}

26

25

48

Oft

29

Apr.

28

31

30

28

51

2,520

1,300

80

77

56

45

43

40

40

321

111

80

54

36

32

32

32*>n

30

30

9Q

30

30

167

66

May.

42

32

30

32

43

54

40

32

32

32

32

35

38

32

32

20

25

20

18i«

 20

17

16

15

15

13

11

10

10

8

7

June.

7.0

7.0

7.0

7.0

7.0

8.0

8.0

8.0

8

n

8.6

4.0

4.0

4.0

4.0

3.6

10

16

17

16

17

13

11

11

11

g 4

4.0

4.0

3.«

3.6

2.0

July.!

1.4

2.0

2.0

2.0

1.4

1.1

1.2

1.4

1.4

1.4

2.0

2.0

1.7

1.6

1.4

1.7

1.4

1.4

2.0

2.0

1.7

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

l.l

1.1

Aug.

1.1

.8

.«

1.2

1.7

.6

.8

1.0

1.0

.8

1.3

1.8

t s

2 4

3.2

2.8

2.8

2.5

2.2

1.7

L4

1.1

1.0

.6

337

1,609

60

33

23

14

16

Sept.;

13aj

Tfc

7,0

3.8

204

1W

68

50,

38

28

23

24

23

23-

16

9.8

12

12

13

138

' 54

43

32

26

27

m

2T

25

18

10

NOTE. Discharge determined by shifting-control method, Dec. 16 to Apr. 5, Aug.6-25, Sept. 5-19. Discharge Apr. 6-7,15, Aug. 25-26 obtained from extension of rating curve and subject to error. Discharge 

Interpolated on Dec. 30-31; Jan. 20,27; Feb. 3,10,17; Mar. 3,10; Apr. 7, 21,28; May 5,12, It, 30; June-1-4, 

16, 25, 30; Jnly 7,14,21,28; Aug. 4,11,18; Sept. 8, IS, 22, and 29.

Monthly discharge of Guadalupe River near Comfort, Tex., for the year ending Sept. SO

1918.

Month.

December 16-31.. ........................................

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

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

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

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

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

Discharge in second-feet.

Maximum.

34 

37 

33 

48 

2,520 

54 

17 

2.0 

1,600 

204

Mjqjnmm.

27 

21 

22 

19 

28 

7.0 

2.0 

1.1 

.6 

3.6

Mban,

29.6 

30.8 

27.8 

23.4 

183 

25.1 

8.13 

1.54 

68.4 

40.2

i

Run-off; 

in

acre-feet.

938 

1,890 

1,940 

1,440 

10,900 

1,540 

484 

94.7 

4,210 

2,390

25,400
BIVEB BAStST. 61

GUABALIFPE BIVEB, AT NEW BBATJlSrFELS, TEX

LOCATION. At highway bridge on San Antonio-Austin post road 700 feet below 

International & Great Northern Railway bridge, 1 mile below mouth of Conaal 

Elver, and I mile northeast of center of New Braunfels, Comal County.

DRAINAGE ABBA. 1,760 square miles.

EBCOBDSAVAHABLI. March 13, 1898, to December 30, 1899; January 27, 1915, to 

September 30, 1918.

GAGE. Stevens water-stage recorder attached to downstream side of middle pier of 

bridge. A vertical staff gage in three sections attached to trees on left bank 200 

feet below Mghway bridge and one section on east side of left pier of highway 

bridge was used from January 27,1915, to September 28,1917, when recorder was 

installed. March 13,1898, to December 30,1899, incHned staff gage near the present highway bridge was used; 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 

ia well of recorder set to read same as vertical staff downstream.

DISCHARGE MEASUREMENTS. Made from downstream side of bridge.

CEEANNEL 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. 

Bock and gravel shoal just below gage serves as control.

BXTKEHES off DISCHARGE, Maximum stage recorded during year, 8.72 feet at 

3 a. m., April 7 (discharge, 7,600 second-feet); minimum mean daily stage, 1.47 

feet, July 20, 22, 24, and 26 (discharge, 270 second-feet). Minimum stage, 1.23 

feet at 6.20 p. m. May 30 (discharge, 188 second-feet).

1898-1899 and 1915-1918: Maximum stage recorded, 27.2 feet at 9.30 p. m., 

September 17, 1915, determined by leveling from flood marks (discharge not 

determined); minimum stage recorded in 1918.

IOB. None reported during year.

DIVERSIONS. Some water diverted for irrigation above station in Kerr and Comal 

counties, and for water power, waterworks, and other municipal uses in Kerr, 

Kendall, and Comal counties; amount not known.

EaotnAMON. Flow at this point slightly regulated by operation of power plants.

ACCTORACT. Stage-discharge relation changes slightly. Eating curve for 1918 well 

defined below 2,500 second-feet. Gage heights from recorder chart determined 

by planimeter. Daily discharge ascertained by applying mean daily gage height 

to rating table except for period during shifting control. Eecords good.

Discharge measurements'of Gwdalupe River at New Braunfels, Tex., during the year.

ending Sept. SO, 1918.

Date.

Oat. 39 

Nwr. 20 Ai*. s

May 17

Made byHank and Gowans.....

E. P. Congdoni. , .......

Gray and McCashin....

Qafp height.

Feet. 

1.62 

1.53

1.64 

2.32

1.65

Dis- 

'charge.

Sec.-ft. 

307 

313

312

609

396

Bate.

July 19 

Aug. 23

Sept. IS 

23

Made by 

Gray and McCasMn. ... 

E. P. Conodon. ........

Gray and Kinnison. . . .

Gage 

height.

>«*., 

L*3 

1.46

1.57

1.88

B|».", 

ehai-ff.

.S»e,'/k. 

288

256

309 

422

69972 22 WSP 478 5
62 STJEFACE WATEE SITFPLY, 1918, PAET VIII.

Daily discharge, in second-feet, of Guadalupe River at New BraunfeU, Tex., for the year

ending Sept. 30,1918. . .

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.

294

298

294

294

290

294

290

298

294

294

294

294

294

298

301

298

301

301

, 294

287 ooi

290

294

301

301

304

308

304

4AR

308

Nov.

. 312

315

312

308

315

315

315

312

312

312

318

Q1K

315

315

322

318

326

354

350

326

318

315

318

322

322

322

322

326

326

326

Dec.

322

49Q

329

326

322

322

326

326

322

326

326

322

322

322

322

322

322

326

326

322

326

329

326

326

326

329

329

332

343

340

336

Jan.

336

336

43ft

329

329

326

329

329

329

332

332

332

332

332

332

332 OOO

326

w>

329

329

329

332

332

332

336

340

329

Q9O

326

329

Feb.

332 oofi

322

322

326

332

329

QQO

332

326

329 319

326

332

336

332 «Mrt

362

QSi

336

336

OKO

346

<M3

336

OOQ

332

336

......

Mar.

350

350

343

336

336

332

332

QQO

340

340

340

336

336

336

326

326

326 Q*>9

326

326

329

322

318

315

0.19

315

312

312

315

9.19

315

Apr.

315

11 **

UK

315

418

1,720

3,250

939

610

493

422

QQO

362

346

143

340

326

430

ma

398

362

336

318

318

qofi

410

Q7<t

343

493

M!Q

May.

560

488

426

386

1,240

1,040

570

480

439

410

398 070

Sfi9

354

346

343

336

qqo

336

332

329

322

318

318

312

312

312

812

308 jme

301

June.

304

308

312

308

304

301

304

301

301

308

304

9QS

294

9fti

294

301

OQft

90S

OQft

290

287

287

287

287

90ft

290

290

290

9JS4

Qfti

July.

287

230

oan

280

287

280

276

287

9.&A.

9Sfi

dan

070

*M

276

284

280 '

Ottn

276

9Sf)

270

270

278

270

273

270

276

273

276

273

Aug.

280

273

280

280

280

284

276

280

280

276

280

280

284

280

276

280

280

280

284

284

287

99i

280

280

wm

380

£47

646

AdS

374

336

Sept.

322

315

9QS

ion.

 KtR

287

422

452

402

354

329

O1O>

308

294

284

tan

987

280

294

290

444

480

870

336

333

346

457

394

362

NOTE. Disctuurge detennined by shifting-control method Oct. 9 to Apr. 5.

Monthly discharge of Guadalupe River at New Braunfels, Tex., for the year ending SepL

30, 1918.

Month.

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

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

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

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

Discharge in second-feet.

U&xixnunu

308 

354 

343 

340 

362 

350 

. 3.250 

1 240 

312 

287 

646 

457

3,250

Minimum.

,287 

308 

322 

326 

322 

312 

312 

301 

284 

270 

273 

280

270

Mean.

297 

320 

327 

331 

335 

328 

542 

420 

297 

277 

318 

339

344

Ban-off 

in 

acre-feet.

18,300 19,000- 

20,100 

20,400 

18,600. 

24200 

3^300 

25,800 IT; 700

17, «W 

10,600 

20,200

249, 00ft
GUABALUPE BASHST. 63

RIVER NEAB GONZALES, TEX .

LOCATION. Just below Guadalupe highway bridge, 1 mile below power house.of 

Gonzales Water Power Co., 1J miles south of Gonzales, Gonzales County, and 2| 

miles below mouth oi San Marcos River.

DRAINAGE AREA. 3,620 square miles (revised).

RECORDS AVAILABLE. July 1, 1915, to September 30, 1918. The United States 

Weather Bureau has records from a gage at a 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 R. Gv 

Wilson. Relation between this gage and United States Weather Bureau gagenot known.

DISCHARGE MEASUREMENTS. Made from cable one-fourth mile below gage or by 

wading below cable.

CHANNEL ANP CONTROL, 'Bed composed of gravel and sand;' channel below station 

is 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 edge on the right and for some distance back on the left; subject to overflow 

only during extremely high stages. Position of control not known.

EXTREMES OP DISCHARGE. Maximum stage recorded during year, 17.8 feet 5.25 p. m. 

April 30 (discharge, 8,640 second-feet); minimum stage, 0.02 foot from 6.40 a. m. 

to 8.30 p. m. August 18 (discharge, 182 second-feet).

1915-19.19: M$ximiu& stage recorded,, 23.25 feet at 7 a. ,m. May 25, JL916 (discharge, 22,800 second-feet, from extension of rating curve and subject to error); 

minimum stage occurred in 1918.

ICE. None reported during year.

DIVERSIONS.- Some water diverted for irrigation abdve, station 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.

REGULATION. Flow regulated to some extent by operation of water-power plants 

above. Power house of Gonzales Water Power Co. is 1 mile above station.

ACCURACY. Stage-discharge relation changed during high water of March 28 and 29. 

Rating curve used before March 28 well defined between 350 and 1,000 secondfeet; rating curve used March 28 to September 30 well defined between 210 and 

800 second-feet and fairly well defined between 800 and 9,510 second-feet. Gage 

read to hundredths twice daily. Mean of two readings daily may not be true 

mean due to power regulation above. Gage-height record prior to May 15 unreliable, but from May 15 to September 30 record is good. Daily discharge determined by applying gage heights to rating table and by shifting-control method. 

Records fair. . '.

'e measurements of Guadalupe River near Gonzales, Tex., during the year ending 

Sept. SO, 1918.

I2>ate;

Get. 3

31

Nov. 28

Jan. 22

Mar. 5

29

Mad«by 

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

E. P;Congdon... ......

&.

Feet. 

0 70

.74

.90

.94

.98

13.20

Discharge.

Stc.-ft. 

420

360

422

436

413

5,710

Date.

Mar. 30

Apr. 7

May 10

Sept. 22

Made by 

R.J.HaSL.. .........

Gaze

height.

Wed,. 

13.98

17.86

1.74

.78

.63

.41

Discharge.

Seejt. 

5,900*

9,180

846

sea

310

254
f4 SURFACE WATER ^SUPPLY, 1918, PAST VIII.

Daily discharge, in second-feet, ofGitaaalupe River near Gonzales, Tex. } for the year endmff

Sept. 30, 1918.

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.

365

368

403

394

3S8

382

382

379

373

376

379

368

370

365

368

362

362

360

358

355

350

352

365

362

355

350

358

421

400

348

345

Nov.

421

418

370

365

368

360

394

352

394

391

397

370

352

350

352

355

355

iKJ

430

467

400

457

352

360

385

474

403

474

403

379

Dec.

362

394

436

439

412

362

388

382

394

391

388

370

376

385

403

433

415

415

427

439

412

403

403

403

409

406

412

406

406

412

382

Jan.

373

360

360

355

370

358

360

365

360

358

352

348

365

382

388

403

418

424

433

483

436

439

436

445 ' '448

451

451

445

445

457

464

Feb.

442

442

442

442

457

451

436

dSfi

451

457

448

448

448

430

430

436

457

436

418

421

424

421

412

412

412

418

424

AAQ

Mar.

436

430

418

415

406

403

400

406

406

406

403

403

397

394

382

376

376

370

368

370

376

544

4R1

4d6

dfK)

409

412

1,400

5,020

5,870

1,200

Apr.

1,340

1,600

2,630

2,210

2,010

4,470

8,610

6.700

1.470

842

790

678

575

554

592

522

502

4X4

477

463

460

456

449

446

442

449

. 456

463

1,050

 7 f QA

May.

6,130

1,660

886

1,110

1,730

4,120

6,740

2* 150

1,230

882

762

742

726

726

575

572

558

BB4

572

572

480'

474

477

463

44fi

dm

400

390

386

4QA

390

June.

362

365

368

488

634

588

435

378

348

348

348

494

502

354

340

36S

ta&

368

390

351

244

354

344

354

327

334

330

334

321

315

July.

306

306

309

324

321

312

309

303

295

309

300

303

303

290

303

298

298

290

298

295

315

280

282

300

290

280

289

280

288

275

280

Aug.

288

281

270

265

278

278

280

365

379

372

208

324

456

407

365

418

376

182

202

185

228

234

424

250

 JftS

290

593

* 234

260

388

Sept.

372

378

37§

' 368

368

893

407

368

337

372

368

.379

407

435

189

306

390

368

363

814

650

300

354

407

376

368 9*7Q

372

334

379

NOTE. Discharge ascertained by shifting-control method Oct. 1 to Mar. 27 and May 1 to June 5.

Monthly discharge of Quadalupe River near Gonzales, Tex., for the year ending Sept

80,1918.

Month.

Octetoer.. ........ ....... ...................;-.......,.....

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

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

MaV. .

July. .................................................... August... . ........ . .. ..... .

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

Discharge in second-feet.

Mftrimnm.

421 

474 

439 

45T 

457 

5,870 

8,610 

6 740 

634 

324 

456 

814

8,610

\finimy|TO

345^, 350' 

362 

348 

412 

368 

442 

386 

315 

275 

182 

180

182

Mean,

370 

394 

402 

: 403 

436 

790 

1.640 

1,220 

388 

287 

307 

386

686

Boo-off 

in acre-feet.

22,800 

28,400 

§4,100 

24930 

2.4,200 

48,600 

97,800

£S

18,300 

18,900 

23,000

«M*>
BIVE& BASEST.

RIVER BELOW CtfKRO,

Bridge;e on Arneckville road, 

Clinton Bridge, 2£ miles southFrom December 26, 

, 1916, a station was 

point. Discharge at two

upstream from gage or by 

station for 1,000 .feet.

Bight bank not subject 

height of 20 feet, for a dfeand gravel rapids 250 feet

LOCATION. Ti-hree-fourthif mile upstream from Heard's

1 mile south of Dietze farmhouse, 2 miles below

east of Cttero, Dewitt County, and 8 miles below power dam 

DRAINAGE AREA. 5^0201 quare miles. 

BECORDS AVAiLA»i&. August 6, 1916, to September 30,

1902, to BfeceMtfer 81,1906, and August 19,1915, to August 6

maintained at Schleicher Bridge, 4 miles above this

sites practically the sane.

<5AGE. Stevens water-sts ge recorder on left bank. 

DISCHARGE MEASUREMENTS. Made from cable 40 feet

wading below low-sta ;e control. 

GfiANN*Ji AN& c<JNT»oi.~-*Chaniiel straight above and below

Bed composed of gra\el and small rock; clean and practically permanent

sand and dirt, covered with brush and open timber, 

"to overflow; left bank subject to overflow above a gage

tance of one-fourth ;Eoile back from river. Rock> 

'; below gage form permanent control during low and medium stages 

EXTREMES OF DISCHARGE, Maximum stage recorded

a. m. March 31 (discharge, 10,200 second-feet); minim

0.58 foot from S to. Ifra. m. November 1 (discharge alout

mined from estensioB of rating curve).

1916-191$; Maximum and minimum stages occurred m 1918 

JOB. None ported during year. 

DIVERSIONS. -Small diversions- for irrigation in upper park

basin do aot greatly affect flow at station. The second

of Water Engineers declares a continuous use of 4,

municipal and manufacturing plants, 730 acre-feet annually for the

2,145 acre-feet annually for New Braunfels, Seguln,

acre-feet storage annually in the drainage basin above i station 

REGULATION. Flow regulated by operation of water-power plants Upstream, df which

one 8 miles above has the greatest effect. 

ACCURACY. Stage-dJSehaige relation changes slightly

curve well defined between 200 and 10,000 second-:

stage recorder unsatisfactory causing breaks in the

discharge ascertained by applying mean daily gage

meter, to rating table, and by shifting-control method.

year, 13.68 feet at 10.30 

um stage recorded, about 

80 second-feet, deterDischarge ifyeamrements of Gt&dalupe River below Cuero, 31 BE., during the gear

Sept. SO, 1918.

Pate.

Oct. 1 

31 

NOT. 28 

Jan. 21 

Mar. 4 

31 

Apr. -"a 

9 

9

' Made Hy-r

K. J. Hank. ...........

Haul: and Gowans . ....

E. J. Hani...... ......

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

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

Gage 

height.

Feet. 

1.49 

.81 

1.6S 

1.83 

1.82 

13.63 

12.91 

11.44 

9.67

Discharge.

Sec.-ft. 

534 

197 

597 

526 

602 

8,340 

9,370 

*,270 

«,370

Bate.

Apr. 10 

10 

10 

May 8 

9 

June 11 

July 9 

Aug. 3 

Sept. 21

Mi

E.J. Hs 

.....do.. 

.....do.. 

Hankar 

.....do.. 

Gray am 

C. E. Me 

A. Z. G( 

E. P. Co

wleby 

ak.. ..........

d'HoC'sisME.'"

; Congdon..;.. 

Cashin. .......

Gagfr 

Wgrt._

#**.,. 

4.66 

4.02 

3.61 

10.78 

5.W 

1.90 

1.25 

1.29 

1.47

Difcharge.

See.-ft, 

2,940 

2,410

428 

465 

587

b of the Guadalupe Biver 

report of the State Board 

second-feet of water for 

city of Cuero,

and Gonzales, and 2,900

during

l&et.

high water. Rating 

Operation of watefgage-height record. Daily 

height determined 

Eecords fair..
,66 SUBFACE SUPPLY, 1M8, PART TOtl.

Daily discharge, in second-feet, ofGuadalwpe River feeftne Cuero, Tes.,for $e year ending

Sept. SO, 19.18.

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.

344

360

372

366

382

355

372

410

4i6

355

316

289

195

416

 344

458

410

360

344

195

428

355

372

322

355

344

440

ojbe

4fU

416

Nov.

262

306

311

165

399

289

422

333

422

306

256

512

294

355

377

350

338

311

602

543

3S8

434

4fU

366

215

ASS

388

382

 422

350

Dec.

382

399

524

382

422

410

355

289

267

476

410

979.

qoo

328

300

816

366

383

vn

388

vxt

434

256

399

416

410

382

sis

308

QOO

AAfi

Jan.

377

394

322

 944

344

366

QQJ2

qoo

416

416

422

OftJ

OAA

602

394

410

qoo

'434

350

322

434

388

ISfi

428

qac

Q*y*>

372

500

ft/Wt

410

 JQO

Peb.

CftA

458

404

482

518

388

CQA

s^ft

t&(\

500

480

470

470

450

430

420

400

380

vjn

qon

tfin

350

380

390

OQfl

oftn

350

360

Mar.

QQA

400

450

*U3

382

355

404

9<U

322

320

320

q*>A

340

3Ttfl

^nn

310

dOA

320

330

330

qnrt)

316

909

986

543

338

1,100

& QQA

7 7^1

9 sun

Apr.

3 tun

dan

770

9,840

1,220

3,630

6,970

9,110

7,660

3,020

1,320

QQO

ftilfi

712

751

660

634

621

673

410

382

536

562

530

Cfkf}

578

958

640

1 190

n o/in

May;

6,349

7 840

i, 290

2,366

5,210

5,810

5, S5

7,420

3,410

1,330

1,010

916

SV7

686

680

74i

673

692

595 ion

570

560

550 550'

579

540

530

550

560

urn

582

June.

sea

530

595

«4fl

673

699

690

680

660

666

REA

fiTl

718

654

1,100 sis

Tia

530

i>ia

306

458

440

530

1 7ia410.

2S9 7*«7 .

JKQp

Jaiy.

366

382

360

345

340

335

330

325

332

316

316

315

320

QQA

. 330.

MA

340

,; 340,

lit

.340.

350

350

360

360

. 360-

qfln

340

340

14A

340

Auf.

WO jyft

340

8JO

344

333

289 "289

322

294

388

5U4

338

294

338

333

410 440"

288

289

360

20*

190

311

322

 4te

235

377

 294

245

' 518

 Sept.

-MA

agt

410

410

484

404 230

289

3f>

230

350

422 jttffi

' 410

!W9I

 388

205

366

446

366

SIS

1.440

744

488

422

158*

536

NOTE. Discharge determined by shifting-control method Nov. 2 to Mar. 2fe No record Feb* 8 to Mar, 

3, Mar. 10-20, May 20-30,, June 5,8-10, July 5-9,13-31, Aug. 1-4; discharge interpolated; .

Monthly discharge ofGuadalupe River below Cuero, Tex.,for the year ending Sept. SO, 1918.

Month,

October........ ..................... ,., .................

November. ...I...........................................

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

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

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

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

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

Discharge in second-feet.

Maximum.

458 

602 

524 

602 

536 

9,800 

9,110 

7,840 

1.100 

3S2 

518 

1,440

9,800

Mrnl^ni^tin.

195, 

165 

256 

322 

350 

294 

382 

530 

289 

315 

190 

205

165

Mean.

374

1,160 

1,840 

1,960 

596 

341 

326 

499

722

 Ban-off 

in

acre-feet.

, 22,200 

21,900 

23,000

23,800 

71,300 

109,000 

121,000 

35500 

21 000 

20,000 

29,700

523,000
fiUADALTJPE

SAN MABCOS BIVBB AT SAS MABCOS, 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, liquates 

above mouth of Blanco River, and 1£ miles below dam of San Marcos Utilities 

Co. and large springs that furnish a constant flow in the stream.

DRAINAGE AREA. Not determined.

RECORDS AVAILABLE. June 10,1915, to September 30,1918. Miscellaneous measurements from 1894, to 1903.

GAGE. Stevens water-stage recorder on left bank, 300 feet below Cape Ginning Cp.'s 

mill. June 10, 1915, to January 19, 1916, vertical staff gage attached to the 

sewer trestle of San Marcos Utilities Co., 1,000 feet bolow Austin-San Aatonio 

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.

CHANNEL AND CONTROL. Bed composed of gravel and sand. Channel straight for 

200 feet above and below the station. Water very clear 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, aid subject to overflow, the 

water spreading back a short distance to a second bank. Position of control not 

known; discharge measurements indicate that it changes slightly.

EXTREMES o? DISCHARGE. Maximum stage recorded during year, 8.12 feet at 8 p. m. 

April 5 (discharge not determined); minimum stage recorded, 0.34 foot at 12.50 

p. m. September 26 (discharge, 11 second-feet, determined from extension of 

rating curve). 

1915-1918: Maximum and minimum stages occurred iii 1918.

ICE. None reported during year.

DIVERSIONS. A concrete dam just above the San Marcos-] juling road bridge makes 

a pond for Rogers's resort and serves as a diversion dam for an irrigation plant on 

left bank; diversion intermittent, but when used takes about 95 second-feet from 

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. 

A dam about 1,000 feet above the station creates a pond from which water ia 

pumped to the south-bank lands. Only diversion bejtween station and 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 flood stages in 

Blanco River backwater is created at the station. The second report of the 

State Board of Water Engineers declares a continuous use of 1,978 acre-feet of 

water annually diverted from San Marcos River to irrigate 989 acres in Hayes 

County, a large part of which lies above the station, and 1,120 acre-feet annually 

for waterworks by San Marcos Utilities Co.

REGULATION. Flow at station entirely regulated by dams above, the greatest effect 

being that produced by the power dam of San Marco» Utilities Co. in the upper 

part of San Marcos, near the springs. This dam backs water over the springs that 

are the source of supply of the river during ordinary stages; water is stored during 

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 affected by moss and weeds in channel; rating 

curve is fairly well defined between 35 and 200 second-feet. No periods of backwater from Blanco River during the year, and the constant flow of San Marcos 

River allows estimates of the discharge to be made without material reduction 

in accuracy. Gage-height record good. Mean daily gage height determined by 

use of planimeter. Discharge determined by shifting-control method. Records 

good.
68 SURFACE WA!EEB SUPPLY, 1918, PART VIII.

Discharge measurements of San Marcos River at San Marcois, Tex., during the year ending

Sept. SO, 1918.

Date.

Oct. 3

Nov. 1 

20

Dec. 28

Feb. 6

12

16

Mar. 23

Made by 

1 Gray and Watefr. ......

Hank and Gowans .....

..,. .do.. ...............

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

Gray and McCasbin. . . .

 ».

Feet. 

1.02

1.71 

1.5S

1.70

1.64

1.70

1.73

1.80

Discharge.

Sec.-ft.

 47.8

102

87.8

94

88.3

88.3

96

89.5

Date.

6 

May 17

Jiily 19

Aug. 23

Sept. 13

Made by 

E. P. Congdm,. ..*.....

Gray and Congdon,.... 

Gray ana MeCtwMn. . . .

QrayandCoagdon... .

Gray and McCJaSMn. . . .

MeCaflWnfWl Ktnti'flon

Gam 

height.

JPerf. 

1.80

2.98 

1.16

1,57

1.35

1.41

1.40

Discharge.

s*.#r. m.9

194 

116 log

81.5

98.9 93.2

Daily discharge, in second-feet, of San Marcos River at San Morcos, Test., for the

ending Sept, SO, 1918.

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.

fiB

Sfi

90

91

91

at

80

91

Ql

90

80

80

89

so

Sfi

87

86

82

92

Si

96

87

87

84

88

Si.

on

92

84

93

77

Now

O9

90

01

Oft

07

<«

93

96

Cft

91

103

100

99

OR

on

102

91fii

QO

92

96

97

97

104

93

92

92

92

89

Dee.

96

91

95

96

QR

QK

95

95

Q4.

94

94

93

Oft

93

oa

92

O9

96

90

92

92

92

95

89

90

95 inn

92

91

89

ftS

Jan.

Qfi

QC

OJ

83

89

82

SA

QA

71

92

109

Oft o*>

85

86

87

95

O7

96

88

96

91

88

90

on

88

86

88

87

R7

Feb.

CO

fift

Cft

GO

s»

O9

fiR

DO

89

90

Sfi

80

Q9

96

97

Oft

96

91

91

92

94

93

92

98

95

Mar.

97

on

94

OR

98

96

95

93

97

92

era

93

90

89

90

100

100

100

100

100

90

94

92

92

94

166

106

92

92

Apr.

93

92

90

323

329

163

163

164

164

165

165

166

166

16?

159

129

124

122

119

119

120

117

117

118

119

118

119

142

129

May.

in

120

118

118

213

142

134

130

130

128

127

126

124

118

117

119

lit

116

114

115

114

113

112

111

108

109

108

106

101

100

100

June.

101

103

104

102

98,

98

97

96

96

«6

02

95

9304

93

96

95

95

93

92

91

88

88

87

88

87

85

88

84

84

July.

86

86

86

84

sa

as

Oi

ai

78

80

85

80

76

84

84

75

78

80

79

80

83

82

78

78

78

79

77

79

76

79

76

Aug.

. 77

78

. 78T

75

76

75

SI

7R

an

81

SI

84

SA

84

84

85

8600%

88

85

86

ss

89

89

90

89

88

89

88

88

Sept.

88

86

85

$807

86

83

86

81

85

84fii

(U

848&

eg

83

S3

83

ss

83

84

83

84

80

88

84

84

84

83

NOTB* Beporder did sot operate Oct. 1-3,9-14, Dec. 8-1*, Dee. 29 to Jan. 9, Apr. 8-14, Aag. 22-26;. discharge determined by interpolation.
B1TEB BASIN. 69

Monthly dteeharge of San Marcos River at San Marcos, Tax., far tHe yea* enMftg 8i,pf.

30,

Month.

October...................,......................*.......

l*ovembW...............................................

Ifeoaab*. ...... .........................................

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

Mat*............. .......................................

May

June ...

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

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

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

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

Discharge in second-feet.

Maxinnata.

96 

194 

100 

109 

98 

166 

329 

213 

104 

86 

90 

88

329

MinteiuBi.

77

SO 

88 

71 

83 

89 

90 

100 

84 

75 

75 

80

71

MMft, i

, ... ' ,'i. ,

88.1 

93.7 

88.1 

88.7 

91.5 ftio

148 

120 

93.3 

f&6 

8.7 

84.4

96.6

Kun-oSIn 

ftcre-feet.

3,4»

588

5,450 

5,080 

$«0 

$690 

7,380 

5,550 

4,960 

5,150 

5,020

TO, doo

BAST HARCOS SIVSB AT OTTnra, TEJC.

LOCATION. Above highway bridge one-fourtli mile southwest of Ottioe, Gouzal«s

County, 4 miles below mouth of Phim Creek, aad 10 miles above confluence

with Guadalupe Eiver. 

DRAINAGE AREA. Indeterminate.

RECORDS AVAILABLE. June 22,1915, to September 30,1918. 

GAGE. Vertical staff in four sections attached to trees on left bank about 20ft feet

above bridge; read by J. H. Kaine. June 22 to October 12, 1915, vertical staff

under tie highway bridge was used; gage heights have been reduced to datum

of present gage by means of a relation curve. 

DISCHARGE MEASUREMENTS. Made by wading at shoal 100 feet below gage or from

downstream side of highway bridge. 

CHANNEL AND CONTROL. Bed composed of sand, rock, and gravel; slightly shifting.

Banks Mgh and wooded; not overflowed except by extremely high water.

Channel straight above and below the station for 150 feet. Low-stage control

formed by shual 100 feet below gage; during high stages on Guadalupe Eiver

backwater destroys stage-discharge relation. 

EXTRUDES OF DISCHARGE, Maximum stage recorded during year, 29.5 feet at 6 p. nt.

April 6 (discharge, 8,750 second-feet). ]!iinimum stage, 1.06 feet at 6.30 p. m.

July 31 (discharge, 26 second-feet).

1915-1918: Maximum and minimum stages occurred in 1918. 

ICE. None reported during year, 

DIVERSIONS. Small diversions for irrigation above itation use only a small part of

the total run-off. 

REGULATION. Flow regulated by the operation of a small cotton gin a short distance

above station. The operation of several small water-power plants in the upper

basin near Ban Marcos and Martindale does not materially affect the flow at this

station. 

ACCURACY. Stage-discharge relation practically permanent. Gage read twice daily

to hundredth^; the mean of these readings may not be a true indication of tie

flow on account of diurnal fluctuation caused by regulation. Daily discharge

ascertained by applying mean daily gage height to rating table and by shifting*

control method. 

KECORDS. -Good. '
70 SUEFACE WATEB SUPPLY, 1918, PABT VIII.

Discharge measurements of San Marcos River at Ottine, Tex., during .the year endvag

Sept. 30, 1918.

Bate.

Nov. 1

29

Jan. 23

Mar. 6

Apr. 7

Made by 

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

A. K. Gowans..........

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

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

Gage

Fed. 

1.51

1.59

1.6S

1.69

23.38

15.47

Discharge.

Sec.-ft. 

87

95

100

100

5,460

O f\Af\

Date.

Apr. 7

8

May 10

Sept. 22

Made by 

E.J. Hank. .........

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

Gage 

height.

Feel. 

12.78

3.53

2.38

4.06

1.50

1

*M

Discharge.

Sec.-ft. 

1,510

343

220

602

76.4

67.0

Daily discharge, in second-feet, of San Mwcos River a,t Ottine, Tex., for the year ending

Sept. SO, 1918.

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..............

80..............

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

Oct.

71

71

70

87

78

77

74

75

72

70

78

77

77

76

76

77

74

74

77

79

84

87

88

82

. 72

71

81

77

&i

81

78

Nov.

79

82

82

80

A£

79

76

82

76

84

SO

77

96

on

89

so

93

87

84

84

79

82

81

86

oo

97

87

8ft

on

Dec.

93

no

97

98

93

on

96

88

95

Ofi

96

91

07

98

98

Q4

87

S22

ftQ

95

O1

93

107

07

97

ftft

93

OR

92

95

Jan

106

OR

02

95

92

O9

97

91

88

104

124

104

130 too

124

102

07

103

96

101

QS

97

97

102

00

92

99

97

ftS

93

Feb.

92

<M

fi£

107

99

93

93

97

103

104

106

98

104

OK

90

Q1

103

130

19Q

inn

O7

no

O9

98

QO

00

96

97

Mar.

104

95

93

92

102

OT

92

92

93

88

97

97

91

97

Q2

7fi

78

OH

00

91

95

OS

90

83

QO

81

1 480

6,' 750

1450

214

Apr.

175

2.080

2 ISO.

124

113

5,320

3,609

375

273

220

153

t4a

136

124

132

124

114

111

117

116

104

288

148

135

129

134

2,630

5,570

May.

574

288

183

150

536

6,800

975

388

287

215

175

161

154

1AS

145

143

130

132

19ft

116

114

111

110

110

103

102

106

99

101

96

June.

107

93

97

411

186

154

148

114

95

96

93

395

103

92

150

124

96

QQ

102

103

96

ftQ

SO

S3

79

78

83

78

76

74

July.

76

78

81fin

72

Tfi

Tfi

74

71

72

72

76

74

74

TO

71

74

74

flft

70

73

: 71

63

VT

71

77

61

80

62

Aug.

71

68

75

SO

73

71

73

77

80

78,

66

65 iia

156

an

64

74

66

67

62

59

80

ftQ

83

64

69

60

70

70

70

66

Sept.

62

65

78

an

66

89

80

67

79

74

90

S3

84

87

70

88

60

71

71

199

68

77

84

1A4

103

02

80

68

NOTE. Discharge determined by shifting-control method Oct. 1 to Jan. 10 and May 1-31; Aprfl 6-8 and 

May 6-7, discharge determined from current-meter measurements made Apr. 6-8, as stage-discharge relation was destroyed by backwater from Guadalupe River.

Monthly discharge of San Marcos River at Ottine, Tex., for year ending Sept. SO, 1918.

Month.

November.... __ ......................................

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

March.................................................... April.....................................................

May.... ....

Joly ..................................................

August........................... _ ....................

Discharge in second-feet.

Maximum.

88 

97 

107 

130 

130 

6,750 

fi,570 

6,800 

411 

87 

156 

199

6,800

Minimum.

70 

76 

83 

91 

86 

78 

104 

96 

74 

61 

59 

62

59

Mean.

77.3 

84.5 

94.2 

101 

100 

399 

837 

419 

122 

73.8 

76.3 

81.5

206

Run-off 

in 

acre-feet.

4,750 

5030 

5 790 

8,2M 

5650 

24500 

49,800 

25800 

. 7 260 

4,540 

4,690 

4,810

149,000
1TATEB SUPPLY, $8(18,

SAH ANTOSIO Bl^BB BASIN. j S , ^ 

SAH ANTONIO BIVER AT SAN ANTONIO, TBX.

i. At.Presa Street Bridge, just below office of San Antonio Water Supply 

Co., in San Antonio, Bexar County, 3 miles below San Antonio Springe, tie 

source of the river. , ,_ ;

DRAINAGE AREA. Indeterminate. , EBCOKUS AVAILABLE. January 26, 1915, to September 30, 1918. Miscellaneous discharge measurements from 1895 to 1906.

GAGE. Vertical staff attached to upstream side of second bent from right bank; 

installed February 28,1916; read, by G. H. Cumberland. October ^23, 1914, to 

February 28, 1916, vertical staff gage attached t® downstream side of middle 

pier, Commerce Street Bridge; relation of the daturas of these gages not known.

DISCHARGE MEASUREMENTS. Made from downstream side of Market Street Bridge, 

first bridge above station, or by wading just below gage. ' . CHANNEL AND CONTROL. Channel straight for a short distance above and below 

station, but the general course is very crooked. Bed composed of gravel, sandj 

i and silt. Banks high and clean; not subject to overflow except during extremely 

high stages, at which time the river spreads over a wide area. A rock and gravel 

shoal and remains of old concrete dam just below the station form control. Vegetation collects in channel and on control at times and affects stage-discharge 

relation.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 9.90 feet at 2.30 

p. m. May 5 (discharge not determined); minimum stage, 0.60 foot at 5.10 p. m. 

August 10, and at 8.15 a. m. August 21 and 24 (discharge, 10 second-feet).

1914-1918: 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 and 

subject to possible error); minimum stage occurred in 1918.

ICE . None reported during year.

DiVERSioNS.-^Considerable land is irrigated in San Antonio and vicinity south pf the 

city; quantity of water diverted not known.

REGULATION. Flow not regulated by permanent dams or controlling works, but at 

times temporary works constructed in improving channel have regulated the 

flow. Flow at station is dependent on discharge of San Antonio Springs.

ACCURACY. Stage-discharge relation affected by moss and vegetation in stream, and 

occasional cleaning of channel. High water also causes changes. Two rating 

curves used; rating curves, October 1 to February 28 well defined between 20 and 

300 second-feet, rating curve March 1 to September 30 is fairly well defined between 8 and 890 second-feet. Discharge above 900 second-feet subject to considerable error. Gage read to hundredths twice daily and oftener during high 

water, but mean of two readings daily may not be true mean. Discharge ascertained by applying mean daily gage height to rating table or by shifting-contrtl 

method. Records fair.

Discharge measurements of San Antonio River at San Antonio, Tex., dwdng tiie

ending Sept. 30, 1918.

Date.

Oct. 30

Nov. 21

Dec. 14

Feb. 6 

Mar. 1

Apr. 1

 6

Made byHank and Gowaas .....

E.J. Hank...... .......

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

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

Gage

height.

Feet. 

0.84

.80

.72

.81 

1.28

.92

.94

Discharge.

See.-ft. 

17.5

23.3 23.5

23.2

55.8

11.1

33

Date.

Apr. 30 May 5

July 10 

30

Aug. 27

Made by 

C.E.M0C88Mn.. ......

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

SB.

Feet. 

.91

3,68

.70

.74 

.73

.64

Discharge.

Sec.Jt. 

37.8

742

13.1

14.4 

16.1

lfi.2
SURFACE WAtEE STJPPpY, 19-18, FAET YIII.

Daily discharge, in second-feet, of San Antonio Mver at Sim Antonio, HKC., for the year

ending Sept. $0,1918.

Day.

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

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

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

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

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

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

0

S::::::::::::-:

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

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

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

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

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

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

l^.... ..........

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

19

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

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

23............ . at................

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

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

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

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

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

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

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

Oct.

23

23

28

23

23

23

33f

23

23

24

24

24

25

24

24

24

24

27

25

24

24

24

25

24

24

24

24

oo

24

24

Nov.

24

24

23

23

23

23

23

24

24

23

23

23

23

23

28

30

23

28

28

no

OQ

28

23

on

23

23

23

Dec.

23

23

no

23

23

23

23

23

38

23

SH

24

24

24

24

24rfj

24

24

24

54

25

25

25

25

24

24

24

24

24

24

Jan.

23

OQ

28

23

23

*w

24

24

24

24

24

24

24

24

24

oo

24

24

24

23

nn

23

23

23

23 23

23

OQ

23

23

Feb.

23

23

oa

OQ

9$

cv>

oo

OQ

24

23

~2S

28

23

22

25

Ori

23

99

2?

24

OQ

23AD

22

22

OQ

24

Mar,'

4Q

16

16

16

17

17

1A

17

14is

in

is

19

19

21

19

19

21

19

21

21

24

29

29

26

28

47

29

29

Apr.

o-i

38

33

309

155

21

21

19

1Q

18

25

20

26

19

145

22

19

21

24

21

29

19

19

248

26

May.

31

' 30

28

29

46

32

31

38

32

29

29

28

24

24

35

22

22

14

22

21

16

16

16

16

16

15

14

14

12

12

June.

12

32

12

12

13 ' 13

13

13

14

18

12

13

18,

17

46

16

15

14

21

13

14

12

- 14

10

13

14

12

13

-IS

ft

IS

13

IS

13

13

20

14

14

14

14

13

16

14

15

15

16

14

14

19

14

14

14

16

14

14

22ir

16

,Aug.

14

12

12

15

tt

14

12

13

12

12

12

18

13

14

14

14 ' 14

W

20

14

14

15

18

16

513

24

16

16

18

16

Sept.

14

16

16

16

15

14

IS

15

U

13

13

14

13

IS

12

12

13

16

12

12

15

11

12

12

IS

12

12

12

Nora. Discharge deterniined by shifting-control method Dec. 1 to Feb. 28, Mar. 6 to May 4, and July 

16 to Sept. 30. Discharge lot May 5 obtained by extension of rating curve ana subject to error.

Monthly discharge of San Antonio River at San Antonio Tea;., for the ye&r

Sept. SO, 1&18.

Month.

October............^.................................... llovember....... .............. ................ _ ........

December.. _ .................... _ ....................

February.. _ . _ .. _ ..................................

Man*-................... ..................................

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

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

«dy ...................................................

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

Discharge in second-feet.

Maximum.

27 

30 

25 

24 

25 

49 

309 

1,860 

46 

22 

513 

21

1,860

Minimum.

23 

23 

23 

23 

22 

14 

18 

12 

12 

12 

12 

11

11

Mean.

23.9 

23.4 

23.8 

23.4 

219 

22.2 

48.3 

82,9 

16.5 

14.8 

30.9 

14.0

29.0

Eun-oflin 

acre-feet.

i,mf

1.MO 

1.469 

1,440 

1,270 

1,^0 

% 2.SIW ; *B

m

1,900 

833

21,000
SAST A3fTO¥IO, BASIH. -

SAW ANTOHIO B.IVEE AT CALAVEEAS, TEX

LOCATION. One-fourth mile south of San Antonio & Aransas Pass Railway station 

in Calaveras, Wilson County, 1 mile below mouth of Calayeras Creek, and 10 miles 

below;»mouth of Medina River.

DBAEKAGE AREA. 1,870 miles.

RECORDS AVAILABLE,-*-March 12 to September 30,1918.

GAGE. Vertical staff in three sections on left bank near old brick plant; read by 

3. W. Dodson.

DISCHARGE MEASUREMENTS. Made by wading below gage. High-water measurements made from highway bridge half a mile upstream from 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 solid 

bottom, and serve as a control, which is practically permanent. Sand deposits 

on control during low water.

EXTREMES OF DISCHARGE. Maximum stage recorded during the period, 32.8 feet at 

11.45 a, m. May 6 (discharge, 11,200 second-feet); minimum stage recorded, 0.14 

foot, 8.30 a. m. September 14 (discharge, 15 second-feet).

ICE. None reported during period.

DIVERSIONS. Second report of State Board of Water Engineers shows a maximum of 

3,538 acre-feet annually appropriated from San Antonio River above the station. 

The Medina reservoir having a storage capacity of 254,000 acre-feet is situated on 

Medina River about 20 miles above its confluence with San Antonio River and 

regulates the flow through the diversion works about 4 miles below. The project 

has a capacity of 850 second-feet arid served 3,735 acres in 1916.

REGULATION. No power plants above or below station. The normal flow may be 

slightly affected by storage and diversions on MedinaJ&ver.

ACCURACY. Stage-discharge relation changes during high water. Two rating curves 

are used, one applicable March 12 to May 3, well defined between 40 and 300 

second-feet and fairly well defined between 300 and 2,000 second-feet; discharge 

above 2,000 second-feet subject to considerable error; the other applicable 

May 4 to September 30, rating curve fairly well defined between 30 and 5,000 

second-feet; poorly defined above 5,000 second-feet. Gag© read to hundredths 

twice daily and oftener during floods. Daily discharge ascertained by applying 

mean daily gage height to rating table. Records good.

Discharge measurements of San Antonio River at Calaveras, Tex., during the year ewRny

Sept. SO, 1918.

Date.

Mar. 13

Apr. -*- 7

7 

7 

7 

10

10 Hay 2

Made by 

JC. P. Cong^on T. .......

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

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

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

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

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

£&

Feet.

0.88

11.52

10.40

0.76 

9.37 

9.09 

1.54

1.51

3.15

32.58

Discharge.

Sec.-ft. 

50.7

1,500

1 280

1,150 

1,100 

1,060 

on

Hi 7

2$8

11,000

Date.

May 7

7

8 

8 

June 11 

July 10

A T]nr 9

Made by 

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

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

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

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

. ....do.. .,........'.....

O.K. McCashin........

E. P. Congdon. ........

Gage

Feet. 

16,30

13.9*

12.41

6.30 

6.14 

1.04

.84

L17

2.46

Bfe. 

ebarge.

8ec.-ft. 

1.990

1,590

1,350

480 

426 

43.9 

87.8

56.9

161
74 stJBFACE WATEB SUPPLY, 1918, PABT vin.

Daily discharge, in second-feet^ of San Antonio River at Calaveras, Tex., for the year ending

Sept. SO, 1918.

Day.

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

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

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

I..... .....................................

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............................................

Mar.

47

51

47

44

43

46

41

42

33

39

42

44

39

44

37

38

38

40

49

44

Apr.

41

40

37

38

38

1,580

1,290

9Qfl

124

108

77

65

61

61

63

60

cfi

48

174

355

110

69

56

52

222

330

97

71

668

5,200

May.

1,030

224

142

116

2,075

10,700

1,900

470

320

205

203

183

175

159

152

142

133

128

117

114

108

104

105

94

86

80

SO

78

72

65

59

June.

66

98

279

183

90

68

65

56

58

54

56

54

52

52

84

83

267

153

S3

65

55

' ,54

49

47

46

45

45

40ad

39

July.

38

40

35^u

34

33

39

36

34

38

37

34

31

27

30

34

35

34

31

33

31

29

32

28

29

29

27

36

36

34

90

Auf.<:

, 128

54

38

38

34

37

36

36

32

29

29

9Q

24

26

23

24

23

27

20

26

125

22

19

21

503

281

135

56

36

34

33

 Sept.

at

' 3ft

22

, 17

17

1ft

21

20

30

20

17

ift

18

16

17

20

20

21

21

671

ISO

' ' 44:

39

89

39

40

, 61

4ft

44

37.

Monthly discharge of San Antonio River at Calaveras, Tex., for the year ending Sept.

30, 1918.

Month.

March 12-31...... ....... ................................

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

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

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

Discharge in second-feet.

Maximum.

51 

5,200 

,10, 700 

1 279 

90 

503 

671

Minimum.

33 

37 

59 

34 

27 

19 

16

Mean.

42.4 

383 

638 

79.3 

35.1 

60.6 

52.5

Run-off in , ..

acre-feet. ;-'_ ;

- : .-M

1,680 v. f 

22,180- ? 

38»9» :

4,720 .'-,-* 2,i60 ;~

3,780; '.J:, 

3,120 >.

* i -

77, ISO-
ANTONIO KIVER BASIN.

SAN PEBRO CREEK AT SAK ANTOOTO, TEX.

LOCATION. Commerce Street Bridge, 1J blocks west of courthouse in San Antonio, 

Bexar County, 1} miles above mouth of Salsamora and Martinez creeks, 1J miles 

below San Pedro Springs, source of creek, and 3 miles above confluence with San 

Antonio River.

DRAIN AGE AREA. Indeterminate.

EECOBDS AVAILABLE. July 20,1916, to September 30,1918.

GAGE. Vertical staff, attached to wall of building No. 713 Commerce Street, on upstream side of bridge on left bank. Read by E. H. Elder and G. H. Cumberland.

DISCHARGE MEASUREMENTS. Made by wading below gage.

CHANNEL AND CONTROL. Bed composed of rock, gravel, and mud; shifting. Channel 

straight above and below station. Banks formed by walls of buildings. City 

improvements have confined the stream to a small channel during low and medium 

stages, but during floods the streets are covered with water for several blocks. 

A shifting shoal about 100 feet below gage serves as control.

EXTREMES OP DISCHARGE. Maximum stage recorded during year, 4.80 feet at 10,30 

p. m. April 5 (discharge, 40 second-feet; determined by extension of rating curve 

and subject to error); minimum discharge October 3-8,2.2 second-feet.

1916-1918: Maximum stage recorded, 6.25 feet at 7.40 a. m. September 25,1916 

(discharge not determined); minimum discharge occurred in 1918.

ICE. None reported during year.

DIVERSIONS . None.

REGULATION. No diurnal regulation of the flow. Fluctuations caused at times by 

improvement works along the channel above and below the gage.

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

Gage read to hundredths twice daily. Daily discharge determined by shifting 

control method. 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 reach 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.

Diatfuxrge measurements of San Pedro Creek at San Antonio, Tex., during the year endingSept. 30,1918.

Date.

Get. 30

NOT. 21

Dec. 14

Feb. 6 Mar. 1

Apr. 1

Made byIt. J. Hank.............

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

&,

Feet. 

1.39

1.39 1 40

1.40 

1.62

1.34

Discharge.

Sec.-ft. 

3.7

3.2 *> a

3.6 

7.6

2 2

Date.

30

July 10 

30

Aug. 27

Made by 

C.E. MeCashta.. ......

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

Gage 

height.

Feet. 

1.34

1.36

1.34

1.32 

1.42

1,30

Discharge*

8ee.-&.- 

'8.$ a,*

&t

3.4 3.7"

;» 3.1
76 SURFACE WATER SUPPLY, X918, BAET VIII.

Daily discharge, in second-feet, of San Pedro Creek at Sm Antonio, Tex., for the year

ending Sept. SO, 1918.

Day.

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

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

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

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

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

6- ........... .

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

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

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

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

li..... .........

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

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

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

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

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

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

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

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

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

21.............. 22........:.....

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

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

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

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

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

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

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

30...1..........

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

Oct.

2.4

2.4

2.2

2.2

2.2

2.2

2.2

2.2

2.5

2.5

2.6

2.8

2.9

2.9

3.0

3.8

3.2

8.2

3.3

3.3

3.4

2.9

2.9

3.0

3.4

3.4

3.3

3.3

3 6

3.6

3.6

Nov.

3.7

3.7

3.7

3.7

3.7

3.4

3.4

3.6

3.5

3.7

3.7

3.7

3.4

3.4

3.4

3.4

3.3

6.4

3.5

3.3

3,0

3.0

3.3

3.3

3.3

3.2

3.2

3.2

3.2

3.2

Dec.

3.2

3.2

3.2

3.0

3.0

3.0

3.0

3.0

3.0

3.0

2.9

2.9

2.9

2.9

2.9

2.9

2.9

2.9

2.9

2.9

2.9

2.9

3.0

3.0

3.0

3.0

3.0

3.0

3.0

3.0

3.0

Jan.

3.2

2.9

2.9

3.2

3.2

3.2

3.4

3.4

3.6

3.7

3.7

3.7

3.7

3.7

3.9

3.9

3.9

3.9

4.2

4.2

4.2

4.2

4.2

4.5

4.5

4.5

4.7

4.8

3.5

8.5

3.5

Feb.

3.5

3.5

3.5

3.5

3.5

3.6

3.6

3.6

4.6

4.2

4.2

4.2

4.2

4.2

4.2

5.4

5.0

4.9

4.9

4.7

6.0

5.6

5.6

5.4

5.4

5.4

5.4

6.4

Mar.

6.4

6.1

5.8

5.7

5.6

5.5

5.4

5.2

5.1

5.0

4 Q

4.8

4. 7

4.6

4.5

4.4

4.2

3.9

3.8

3.7

3.6

3.5

3.4

3.3

3.2

3.0

2.9

2.8

3.7

2.6

2.5

Apr.

2.5

2.4

3.0

2.4

16

2.8

2.6

2.6

2.6

2.6

2.6

2.6

2 6

2.6

3.2

2.7

2.7

2.6

14

2.8

2.7

2.8

2.8

2.8

7.6

3.2

3.0

3.2

15

3.6

May.

3.5

3.S

3.5

3.5

19

4.9

4.4

4.5

4.6

4.4

4.5

4.5

4.2

4.1

4.1

4.2

4.0

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.1

4.0

4.1

4.0

4.0

4.0

4.1

June.

3.9

4.1

6.0

4.0

3.9

4.1

4.0

8.9

3.9

3.7

3.7

3.7

3.7

3.7

3.7

10

3.9

3.9

3.9

3.9

4.0

3.9

4.1

3.9

4.1

4.2

4.5

4.2

4.2

4.2

Jaly.

4.2

4.2

4.4

4.2

4.1

4.0

4.0

4.0

3.9

3.8

3.8

3.7

3.5

3.4

3.4

\ 3.3

3.4

3.2

3.2

3.0

3.3

3.0

3.0

3.2

3.0

3.0

3,0

3.2

8.3

7.1

2.6

Aug.

2.8

2.6

2.6

2.8

2.7

2.7

2.7

2.8

2.8

2.9

2.8

2.9

3.0

2.9

3.0

3.0

4.8

3.0

3.0

3.2

3 2,

3.2

3.2

3.4

3.7

3.4

3.2

3.2

3.2

3.2

3.2

Sept.

3.2

3.2

3.2

3.2

3.4

3.2

3.2

8.2

3.8

3.2

3.0

3.0 3.0<

3.0

3.0

2.9

3.0

2 9

3.0

3.0

3.0

3.0

3. ft

2.9

3.0

0 fl

2.9

2.9

2.»

2.9

Monthly discharge of San Pedro Creek at San Antonio, Tex., for the year ending Sept.

SO, 1918.

Month.

MateJx.... ....... .........................................

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

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

J*ly......................................................

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

Discharge in second-feet.

TtftfgfmnTn8.2 

6.4 

3.2 

4.8 

6.4 

6.4 

16 

19 

10 

7.1 

4.8 

3.4

19

AfjnjmnTn.

2.2 

3.6 

2.9 

2.9 

3.5 

2.5 

2.4 

3.5 

3.7 

2.6 

2.6 

2.9

2.2

Mean.

3.05 

8,52 

2.98 

3.79 

4.58 

4.32 

4.15 

4.59 

423 

3.63 

3.06 

8,«5

3.74

Run-oSin 

acre-feet.

188 

209 

183 

233

S

252 %

223 

18S lit

2, no
SURFACE WATER SUPPLY, 1918, PART VUI. 77-

NUECES BIVEB BASIN.

NUECES RIVER WEAR CINONIA, TEX.

LOCATION. About 250 feet below suspension highway bridge near Oswald's 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.

RECORDS AVAILABLE. July 5, 1915, to September 30, 1918.

GAGE. Dexter water-stage recorder on right bank, 200 feet below highway bridge, 

operated October 1 to May 5 when recorder was removed owing to poor results. 

From May 6 to September 30 vertical staff read by C. C. Oswald.

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 and free from vegetation; 

subject to shift prior to September 23, 1917. Banks high, wooded, and not subject to overflow. Channel straight above and below station. September 23,1917, 

a concrete artificial control was completed at the site of water-stage recorder installation; point of zero flow, 0.85 foot. The stage-discharge relation has been seriously affected at times prior to installation of artificial control by collection of 

logs, leaves, and brush below gage.

EXTREMES OP DISCHARGE. Maximum stage recorded during year, 12.0 feet at 10 

a. m. May 4 (discharge, 920 second-feet obtained by extension of rating curve 

and subject to error); no flow June 29 to August 26 and September 3-30.

1915-1918: Maximum stage recorded, 20.0 feet at 6.30 a. m. September 19, 1915 

(discharge not determined); no flow during periods in 1917 and 1918.

ICE. None reported during year.

DIVERSIONS. Considerable water diverted above station for irrigation; amount not 

known.

REGULATION. Available data indicate no regulation above station.

ACCURACY. Stage-discharge relation permanent. Rating curve well defined below 

400 second-feet. Gage heights from Dexter recorder October 1 to May 5; May 6 

to September 30, staff gage read to hundredth^ twice daily. Mean daily gage 

height for period of recorder record determined by averaging hourly readings 

from recorder charts. Daily discharge ascertained by applying mean daily gage 

height to.rating table. Discharge above 400 second-feet obtained by extension 

of rating curve and subject to error. Records good.

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 seeps into 

the bed just below Uvalde, and returns to the surface just above the station, The 

condition of the underground waters may have an effect on this return water and thua 

help to equalize the flow.

Discharge measurements of Nueces River near Cinonia, Tex., during the year ending Sept.

30, 1918.

Date.

Nov. 22

Jan. 12

12

Mar. 5

May 6

Made by 

R.J.Hani. ...........

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

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

height.

Feet. 

1.19

1.22

1.22

1.20

1.04

3.03

Discharge.

Sec.-ft. 

3.3

4.4

4.8

3.3

1.3

94.9

Date.

May 6

11

July 31

Sept. 17

Made by 

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

E. P. Congdon. ........

Gage 

height.

Feet. 

2.84

1.84

1.32

1.56

Discharge.

Sec.Jt. 

86.3

30.2

6.8

16.8

.0

.0

69972 22 WSP 478 6
.78 STJEFACE WATER SUPPLY, 1918, PAET VIII.

Daily discharge, in second-feet, of Nueces River near Cinonia, Tex., for the year ending

Sept. SO, 1918.

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.

1.0

1.0

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.1

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

1.0

Nov.

1.0

1.1

1.3

1.4

1.5

1.5

1.5

1.5

1.5

1.5

1.4

1.4

1.4

1.4

1.4

1.5

1.5

1

O

2 1

2 A

2.8

3.0

3 0

3.2 i 4

3.4

3.4

3.4

1 4.

1 4.

Dec.

3.7

3.7

3.7

3 7

3.4

3.4

3.4

3 A

a

t

^ 7

3 7

O Q

3 7

4

O

4.4

4.7

4.7

4.7

4.7

4.4

4.4

4 4

4.4

4.4

4.4

4 4

Jan.

4.4

4.7

4.7

4.7

4.4

4.7

4 4

4.4

4.4

4 4

4.4

0 Q

3 Q

3 Q

3 Q

3 7

3 Q

0 Q

^ Q

^ Q

^ Q

3.9

3 0

3.9

3 Q

3 Q

^ Q

0 Q

3 Q

3 Q

^ Q

Feb.

H Q

3.9

3.9

3 Q

4.2

4.2

4. 9

4.2

4.2

4 9

4 2

4.2

4.4

4 4

4.4

4 4

4.4

4.4

i 9

4 9

4.4

4.4

4.4

4.2

4 9

H Q

3.9

o 7

Mar.

3.7

3.7

3.4

3.4

3.4

3.0

3.4

3 7

q n

2

0

2.6

2 1

1 Q

0 1

2.2

2.4

2.4

2 A

2.4

2.4

2.6

2.4

3.4

3.4

3.0

2.4

2.4 2 4

2.6

2.8

2.6

Apr.

2.6

9 4

2.4

2 A

9 4.

1.9

1.3

1.1

1.0

1.0

g

1.0 1.1

1 9

1 ^

1.4

1.5

1.5

1.4

1.3

1.2

1.1

1.0

.8

1.6

3.0

4.4

May.

6 4

8.9

12

Q9A

335

112

83

17

12

9 4

7 9

5.7

5.0

5.0

4.4

4.4

1 Q

3.0

3.0

2.6

2.2

2.2

1.9

1.9

1.4

1.4

1.4

1.2

1.2

1.0

.8

June.

0.8

.6

.5

.5

.5

.4

3

159

11

3 4

14

11

5.4

13

5.0

3.2

1 7

1.6 1 i

1.0

.9

.6

.5

.5

.4

.2

.2

.1

Aug.

32

16

4.7

1.8

.8

Sept.

0.4

.1

NOTE. No record Deer 31 to Jan. 3 and Mar. 1-4; discharge interpolated. No flow on days for which 

no discharge is given.

Monthly discharge of Nueces River near Cinonia, Tex., for the year ending Sept. 30, 1918.

Month.

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

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

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

Discharge in second-feet.

Maximum.

1.1 

3.4 

4.7 

4.7 

4.4 

3.7 

4.4 

920 

159 

.0 

32 

.4

920

Minimum.

» 1.0 

1.0 

3.4 

3.7 

3.7 

1.9 

.8 

.8 

.0 

.0 

.0 

.0

.0

Mean.

1.05 

' 2.09 

4.06 

4.11 

4.18 

2.79 

1.56 

50.9 

7.99 

.00 

1.76 

.02

' 6.77

Run-off 

in 

acre-feet.

64.6 

124 

250 

253 

232 

172 

92.8 

3.130 

475 

0 

108. 

1.2

4,900
NUECES RIVER BASIN. 79

NTJECES RIVER NEAR COTTJLLA, TEX.

LOCATION. At Hargus dam, 4 miles west of Cotulla, La Salle County.

DRAINAGE AREA. 5,030 square miles.

RECORDS AVAILABLE. July 1, 1915, to June 13, 1918, when station was discontinued.

GAGE. Vertical staff attached to trees on right bank just above dam; read by William 

Peoples.

DISCHARGE MEASUREMENTS. Made by wading below dam. No facilities for measurements at medium and high stages, except at highway bridge 4 miles below

CHANNEL AND CONTROL. Bed composed of gravel, rock, and sand; channel straight 

above and below station. Banks wooded, medium in height, and not subject to 

overflow. Long concrete dam just below gage serves as a control; crest of dam 

irregular.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 4.90feet at 5 p. m. 

May 5 (discharge, 7,980 second-feet, based on measurement May 10); no flow 

during a large part of the year.

1915-1918: Maximum stage recorded, 6.50 feet August 22, 1916 (discharge, 

23,000 second-feet, from extension of rating curve and subject to error; no flow 

during large part of each year.

ICE. None reported during year.

DIVERSIONS. Large part of ordinary flow above station pumped or diverted for irrigation. The station is in upper end of an irrigated section near Cotulla. The 

second report of the State Board of Water Engineers shows diversion works of Winter Garden Irrigation Co. and Nueces Valley Irrigation Co., having capacities of 

95 and 66 second-feet, respectively, each system irrigating 10,000 acres in Zavalla 

and Dimmit counties.

REGULATION. Flow regulated by storage reservoirs and pumping plants above.

ACCURACY. Station discontinued on June 13, 1918, on account of poor rating conditions. No section available for medium and high stage discharge measurements. 

No flow from October 1 to June 13, except May 2 to 29, and runoff for that

period estimated at 99,000 acre-feet. Daily discharge not published.

Discharge measurements of Nueces River near Cotulla, Tex., during the year ending Sept.

SO, 1918.

Date.

Nov. 24

Made by Gage 

height.

Feet. 

0.00

.00

Discharge.

Sec.-ft. 

0.0

.0

Date.

Mar H

Made by 

E. P. Congdon.........

Gage 

height.

Feet. 

0.00

4.38

Discharge.

Sec.-ft. 

0.0

6,950
80 SURFACE WATER SUPPLY, 190.8, PART VIII.

NUECES RIVER NEAR THREE RIVERS, TEX.

LOCATION. At San Antonio, Uvalde & Gulf Railroad bridge 1 mile west of Kittie, 

2 miles southeast of Three Rivers, Live Oak County, and half a mile below mouth 

of Frio River.

DRAINAGE AREA. 15,600 square miles.

RECORDS AVAILABLE. July 1, 1915, to September 30, 1918.

GAGE. Vertical staff attached to center pier of railroad bridge; read by A. J. Sharpley 

and F. G. Seckinger.

DISCHARGE MEASUREMENTS. Made by wading 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. Position of high-water control not known; shoal just below gage 

probably forms low-water control.

EXTREMES OF DISCHARGE. Maximum jstage recorded during year, 29.2 feet 12 to 1 

p. m. September 21 (discharge, 14,600 second-feet); no flow, October 7 to November 17, November 28 to. February 10, June 7-10, July 14-26, 28-31, August 4-25, 

September 3-6.

1915-1918: Maximum stage recorded, 30 feet August 25, 1916 (discharge, 15,500 

second-feet); no flow during large part of each year.

ICE. None reported during year.

DIVERSIONS. Considerable land irrigated above station but none in the immediate 

vicinity.

REGULATION. Flow regulated to some extent by storage reservoirs and pumping 

plants above, but the effect is not so pronounced as at the stations in the upper 

part of the basin. Any water-power plants existing in the area above the station 

are probably small.

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

below 7,000 second-feet. Gage read to hundredths twice daily; oftener during 

floods and when flow fluctuates rapidly. Daily discharge ascertained by applying mean daily gage height to rating table except during periods when stagedischarge relation is affected by shifting control. Records fair.

Discharge measurements of Nueces River near Three Rivers, Tex., during the year ending

Sept. 30, 1918.

Date.

Nov. 26

Jan. 18

Mar. 8

May 9

Made by 

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

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

E. P. Congdon.. .......

Gage 

height.

Feet. 

0.33

1.16

9.32

Discharge.

Sec.-ft. 

a 0.2

.0

15.6

1,870

Date.

June 12

29

Made by- Gage 

height.

Feet. 

1.66

.62

1.04

Discharge.

Sec.-ft. 

66.3

6.7

27.3

a Estimated.
NUECES RIVER BASIN. 81

Daily discharge, in second-feet, of Nueces River near Three Rivers, Tex., for the year

ending Sept. SO, 1918.

Day. '

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

181...................

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

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

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

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

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

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

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

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

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

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

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

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

Oct.

0.6

3.6

2.3

1.4

.5

Nov.

110

1,030

278

v>

8.1

3.4

.7

.4

.2

.1

Feb.

68

18

8.4

4.8

2.8

1.5

.5

.3

.2

.1

7.2

18

6.8

4.2

1.5

.6

.2

Mar.

0.2

101

1 340

1 QQft

1 190

53

91

16

12

8.8

7.4

6.4

5.4

4.4

3.2

3.4

ao

9 fi

2.4

2.3

9 n

1.7

1.5

8t

18

-9.5

5.4

3.6

2.9

16

99

Apr.

27

11

6.0

.9

2 300

2^680

566

173

158

9A

94

81

42

25

17

13

11

860

1,570

636

456

189

68

57

896

237

94

52

fi 4Art

May.

6.320

1.370

1,160

1,330

2,940

5,470

5.760

3.590

1,800

2,380

2,500

1,720

2,220

3,650

4,650

5,030

4,390

3 1 *^fl

2,330

1,800

1,140

213

128

81

3S

28

26

22

18

18

10

June.

20

20

19

181

24

.2

452

94

398

288

77

1,610

3,200

1 060 '596

626

636

647

338

213

95

69

42

51

30

24

July.

6.4

4.0

3.4

4.6

6.4

5.2

3.6

3.2

1.8

1.7

1.7

1.2

.2

81

Aug.

7.4

5.2

3.6

18

175

81

13

5.2

3.4

Sept.

1.7

.5

1,480

295-

62:

221

us;

26.

22: is;

14

8.6

4.4

1.8

. 1.2

7,900

14,000

4,390-

555

263,

264

4,140-

2,520

49ft

272

48

NOTE. Discharge determined by shifting-control method, Mar. 6 to Apr. 5; on Sept. 22 from rating 

..urve drawn through measurements made on that date; Sept. 29, interpolated. No flow on days for whicfi 

iio discharge is given.

Monthly discharge of Nueces River near Three Rivers, Tex., for the year ending Sept. SO,

1918.

Month. ,

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

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

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

Discharge in second-feet.

Maximum.

3.6 

1,030 

.0 

.0 

68 

1,890 

6,460 

6,320 

3,200 

81 

175 

14,000

14,000

Minimum.

0.0 

»0 

.0 

.0 

.0 

.2 

.9 

18 

.0 

.0 

.0 

.0

.0

Mean.

. 0.28 

48.4 

.0 

.0 

5.12 

159 

596 

2,110 

360 

4.01 

10.1 

1,240

378

Run-off 

in acrefeet.

17.2 

2,880 

.0 

.0 

284 

9,780 

35,500 

130,000 

21,400 

247 

621 

73,800

275,000
82 SURFACE WATER SUPPLY, 1918, PART VIII.

MTTECES RIVER AT CALALLEN, TEX.

LOCATION. At old pump house for city of Corpus Christi, half a mile northwest of 

Calallen, Nueces County, half a mile above edge of tidewater and breakwater 

dam, 8 miles above Nueces Bay, and 18 miles west of Corpus Christi.

DRAINAGE AREA. 16,700 square miles.

RECORDS AVAILABLE. August 12, 1915, to September 30, 1918.

GAGE. Vertical staff attached to pipe-line support of old pump house; read by Henry 

Wagner.

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, which is a loose rock dam half a mile below, serves 

as control; after each rise rock is piled on dam causing changes in stage-discharge 

relation.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 7.25 feet, June 19 

(discharge, 6,230 second-feet); no flow August 23-28.

1915-1918: Maximum stage recorded, 8.38 feet September 5, 1916 (discharge, 

6,190 second-feet); no flow August 23-28, 1918.

ICE. None reported during year.

DIVERSIONS. Considerable water taken from river for irrigation above station. The 

municipal water supply of Corpus Christi is pumped from the river just below the 

the gage; the report of the State Board of Water Engineers shows a continuous 

use of 0.93 second-foot and a storage of 675 acre-feet annually for this purpose, and 

a consumption of 218,000,000 gallons during 1916. A second small pump for private use installed between city intake and breakwater is seldom operated. The 

quantities pumped are small and do not greatly affect the natural flow during 

ordinary stages.

REGULATION. No regulation of consequence above station.

ACCURACY. Stage-discharge i elation not permanent because of leakage and repairs 

in the breakwater dam. Low-water discharge measurements made at breakwater 

are poor because of leakage through dam. Rating curve is fairly well denned. 

Gage read to hundredths twice daily. ' Daily discharge ascertained by applying 

gage height to rating tables and by shifting-control method. Allowances made 

for rising and falling stages in computing discharge. Records poor.

Discharge measurements of Nueces River at Calallen, Tex., during the year ending Sept. SO,

1918.

Date.

Nov. 27

Jan. 18

Mar. 6

7

7

Made by 

E. P. Congdon.........

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

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

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

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

Gage 

height.

Feet. 

1.45

1.01

3.80

3.41

3.16

Discharge.

Sec.-ft. 

a20.0

a 5.0

1,710

1,220

992

Date.

Mar. 7

8

May 8

23

Made by 

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

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

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

Gage 

height.

Feet. 

2.94

2.35

5.96

6.34

6.56

Discharge.

Sec.-ft. 

833

395

3,240

3,330

3,650

a Estimated.
NUECES RIVER BASIN. 83

Daily discharge, in second-feet, of Nueces River at Calallen, Tex.,for the year ending Sept.

30, 1918.

Day.

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

2...........

3...........

4...........

5...........

6...........

7...........

8...........

9...........

10...........

u. ..........

12...........

13...........

14...........

15...........

16...........

17...........

18...........

19...........

20...........

21...........

22...........

23...........

24...........

25...........

26...........

27...........

28...........

29...........

30...........

31...........

Oct.

8.0

8.0

8.0

8.0

8.0

8.0

8.0

7.0

6.0

6.0

6.0

5.5

5.5

5.5

5.0

4.8

4.2

4.0

4.0

4.0

4.0

3.5

3.2

3.0

3.0

3.0

9 9

2.8

2.5

2.5

2.4

Nov.

2.4

2.2

2.2

2.2

2.2

2.2

2.2

2.2

2.1

2.0

1.8

1.6

1.5

1.4

1.4

1.4

1.4

1.4

1.4

2.4

284

565

284

156

95

i 

82

25

18

17

15

Dec.

14

12

11

10

10

8.0

8.0

6.5

5.0

5.0

5.0

5.0

3.5

3.5

3.5

2.6

2.0

2.0

2.0

2.0

2.0

9 n

2.0

2.0

2 A

2.0

2

n

9 n

2.0

2.0

2 A

Jan.

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

2.0

1.0

1.0

2.6

4.4

5.0

5.0

5.0

5.3

5.3

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

5.0

Feb.

5.0

5.0

5.0

5.0

5.3

5.3

5.3

5.3

5.3

5.3

5.6

5.6

5.6

5.6

6.2

6.2

6.5

6.2

5.9

5.6

5.6

5.6

5.6

5.6

5.6

5.3

5.0

5.0

Mar.

10

53

424

689

1,610

1,580

1,020

284

156

88

73

53

32

26

 20

20

16

16

13

7.4

5.0

5.0

5.0

5.0

5.0

5.0

5.0

3.5

11

26

15

Apr.

14

16

.19

64

73

73

201

1,400

1,780

950

284

164

164

2.0

1.0

1.0

4.4

2.0

182

279

349

305

120

35

90

50

102

305

360

580

May.

857

l',390

2,120

3,420

4,350

4,490

4,190

3,420

3,910

4,440

3,850

2,370

2,070

1,420

1,160

2,190

3,250

3,780

4,410

4,480

3,990

2,310

1,080

454

73

19

18

17

14

13

12

June.

16

15

14

12

11

12

10

8.0

8.0

8.0

8.0

17

82

143

310

588

1,190

5,630

6,230

5,390

2,010

454

625

588

412

284

201

173

143

95

July.

143

82

58

58

32

20

18

16

16.

14

12

10

10

8.0

6.5

6.5

5.0

5.0

5.0

5.0

3.5

3.5

3.5

3.5

3.5

3.5

3.5

3.5

210

234

234

Aug.

210

187

123

116

106

82

32

26

20

20

16

13

12

12

10

10

8.0

6.5

5.6

5.0

4.4

2.0

.0

.0

.0

.0

.0

.0

106

248

210

Sept.

210

173

143

116

88

73

73

58

37

30

73

201

268

338

299

210

173

258

234

550

1,720

2,370

3,560

4,540

2,550

657

418

1,160

1,940

544

NOTE. Discharge determined by shifting-control method Apr. 18to June 15 and Sept. 19 to 30. 

Monthly discharge of Nueces River at Calallen, Tex., for the year ending Sept. 30, 1918.

Month.

October..................................................

March....................................................

April.....................................................

June.....................................................

JAuly.... ........................ ..........................

September...............................................

The year .................. Jm .......................

Discharge in second-feet.

Maximum.

8.0 

565 

14 

'5.0 

6.5 

1,610 

1,780 

4.490 

6,230 

234 

248 

4,540

6,230

Minimum.

2.4 

1.4 

2.0 

1.0 

5.0 

3.5 

1.0 

12 

8.0 

3.5 

.0 

30.

.0

Mean.

5.04 

52.6 

4.6 

3.7 

5.5 

203 

260 

2240 

823 

39.9 

51.3 

769

374

Run-off in 

acre-feet.

310 

3,130 

283 

228 

305 

12,500 

15,500 

138,000 

49,000 

2,450 

3,150 

45,800

271,000

FRIO RIVER NEAR DERBY, TEX.

LOCATION. At International & Great Northern Railway bridge 900 feet below mouth

of Leona River and 4 miles south of Derby, Frio County. 

DRAINAGE AREA. 3,500 square miles.

RECORDS AVAILABLE. August 1, 1915, to September 30, 1918. 

GAOE. Vertical staff attached to pier of railway bridge; read by John Speed. 

DISCHARGE MEASUREMENTS. Made from railway bridge or by wading.
84 SURFACE WATER SUPPLY, 1918, PART VIII.

CHANNEL AND CONTROL. Bed composed of rock, sand, and gravel; channel straight 

at gage for 150 feet. Banks' wooded, high, and not subject to overflow. A concrete dam 50 feet below gage forms control during low and medium stages; position of high-water control not known. Point of zero flow, gage height 0.06 foot.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 10.1 feet at 4 a. m. 

May 7 (discharge, 4,330 second-feet); no flow in stream during several long periods. 

. 1915-1918: Maximum stage recorded, 13.0 feet at 10.30 a. m. April 3, 1916 

(discharge not determined); no flow during parts of each year.

ICE. None reported during year.

DIVERSIONS. Small areas are irrigated by diversions and pumping at the headwaters, 

but available information does not show that water is taken from the stream 

immediately above the station.

REGULATION. None so far as is known.

ACCURACY. Stage-discharge relation practically permanent. Gage read to hundredths once daily; oftener during extreme fluctuations. Rating curve well 

defined below 2,200 second-feet. Daily discharge ascertained by applying gage 

height to rating table. Records good.

Discharge measurements of Frio River near Derby, Tex., during the year ending Sept.

30, 1918.

Date.

Nov. 24

Made by height .

Feet. 

0.07

Discharge.

-Sec. ft. 

0.0

.0

Date.

Mar. 4

Made by Gage 

height.

Feet.

1.61

Discharge.

Sec. ft. 

0.0

260

Daily discharge, in second-feet, of Frio River near Derby, Tex., for the year ending Sept.

30, 1918.

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.............................................................

Nov.

4.6

27

3.8

2.4

.5

Apr.

737

243

38

12

3.5

2.4

.5

.2

2.7

1.0

273

May.

2,200

321

189

52

321

2,480

2,700

289

78

32

12

6.2

2.7

2.7

1.3

1.0

.4

Aug.

46

89

21

5.6

2.4

Sept.

0.5

.1

4.6

26

12

2.0

.5

41

12

3.5

1.7

.2

NOTE. No flow on days and months for which discharge is not given.
NTJECES EIVER BASIN. .85 

Monthly discharge of Frio River near Derby, Tex., for the year ending Sept. SO, 1918.

Month.

October. .................................................

December. ....................................;..........

February.. ...............................................

March... .................................................

July.....................................................

September ...............................................

Discharge in second-feet.

Maximum.

0.0 

27 

.0 

.0 

.0 

.0 

737 

2,700 

.0 

.0 

89 

41

2,700

Minimum.

0.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0

.0

Mean.

. 0.0 

1.28 

.0 

.0 

.0 

.0 

43.8 

280 

.0 

.0 

 5.29 

3.47

28.2

Run-off 

in 

acre-feet.

0.0 

76.2 

.0 

.0 

.0 

.0 

2,610 

17,200 

.0 

.0 

325 

208

20,400

FRIO RIVER AT FOWLERTON, TEX.

LOCATION. At Frio River dam, about half a mile northeast of Fowlerton, La Salle 

County, 1^ miles below diversion for Frio Lake storage reservoir and 8 miles 

below mouth of Jahuey Creek.

DRAINAGE AREA. 4,350 square miles.

RECORDS AVAILABLE. July 1, 1915, to September 30, 1918.

GAGE. Vertical staff attached to tree on right bank about30 feet above dam; read by 

Joe McMains and J. F. Martin.

DISCHARGE MEASUREMENTS. Made by wading below dam or from railroad bridge 

about 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 

right bank cultivated; left bank wooded. Concrete dam about 20 feet below gage 

serves as permanent control at all stages. Point of zero flow, gage height 0.00 

foot.

EXTREMES OF DISCHARGE. Maximum stage recorded durilig year. 2,87 feet May 8 

(discharge, 1,500 second-feet); no flow for extended periods.

1915-1918: Maximum stage recorded, 3.9 feet at 6 a. m. April 19, 1916 (discharge, 4,120 second-feet); no flow during parts of each year.

ICE. None reported during year.

DIVERSIONS. Some water diverted for irrigation above station. A diversion for the 

Frio Lake reservoir is made 1J miles above; other diversions are scattered and 

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 practically permanent. Gage read to hundredths once daily; slight error may be introduced by the assumption that one 

reading gives the mean stage for the day. Rating curves well denned below 

2,000 second-feet. Daily discharge ascertained by applying gage height to rating 

table. Records fair.
86 SURFACE WATER SUPPLY, 1918, PART VIII.

Discharge measurements of Frio River at Fowlerton, Tex., during the year ending Sept.

SO, 1918.

[Made by E. P. Congdon.]

Date.

May 9........................................................... ....................

Aug. 28.............................................................................

Gage 

height.

Feet, 

1.58

Discharge.

Sec.jt. 

449

0

Daily discharge, in second-feet, of Frio River at Fowlerton, Tex., for the year ending Sept.

SO, 1918.

Day.

1. ........

2.........

7. ........

8.........

9.........

10.........

Apr.

252

46

May.

475

825

230

177

500

857

1,500

366

92

Sept. Day.

11.........

12.........

13.........

14.........

15.........

16.........

17.........

18.........

19.........

20.........

Apr.

14

7.0

3 9

.2

May.

30

16

5.8

3.2

2.2

.8

Sept.

25

Day.

21.........

22.........

23.........

24.........

25.........

26.........

27.........

28.........

29.........

30.........

31.........

Apr.

16

5.8

1.5

.2

May. Se.pt.

37

NOTE. No flow on days and months for which discharge is not given. 

Monthly discharge of Frio River at Fowlerton, Tex., for the year ending Sept. 30, 1918.

Month.

October.........................'.........................

November ...............................................

April.....................................................

July.....................................................

Discharge in second-feet.

Maximum.

.0 

.0 

.0 

.0 

.0 

.0 

252 

1,500 

.0 

.0 

.0 

37

1,500

Minimum.

.0 

.0 

.0 

.0 

.0 

.0 

.2 

.8 

.0 

.0 

.0 

.0

.0

Mean.

-0 

.0 

.0 

.0 

.0 

.0 

11.6 

164 

.0 

.0 

.0 

2.07

15.0

Run-off 

in acrefeet.

0.0 

.0 

.0 

.0 

.0 

.0 

690 

10.100 

.0 

.0 

.0 

123

10,900

FRIO LAKE OUTLET NEAR FOWLERTON, TEX.

LOCATION. At Frio Lake dam, 1J miles northeast of gaging station on FriolRiver

and 2 miles northeast of Fowlerton, La Salle County. 

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. July 1, 1915, to September 30, 1918. 

GAGE. Vertical staff attached to post on right bank about 100 feet above dam; read

by Joe McMains and J. F. Martin. 

DISCHARGE MEASUREMENTS. Made by wading below dam or from railroad bridge

about a mile above gage.
NUECES RIVER BASIN. 87

CHANNEL AND CONTROL. Channel straight for some distance abov*e and below station.

Right bank clean, cultivated, about 8 feet high; left bank is wooded and is 5 to 8

feet high; neither bank subject to overflow. Concrete dam about 100 feet below

gage serves as control at all stages. Point of zero flow, gage height 0.00 foot. 

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 1.47 feet at 4.30

p. m. May 8 (discharge, 1,250 second-feet); no flow for extended periods. 

1915-1918: Maximum stage recorded, 3.16 feet from 8.30 a. m. to 10 a. m.

April 19, 1916 (discharge, 4,070 second-feet); no flow for extended periods each

year.

ICE. None reported during year.

DIVERSIONS. Lake is used for storage. Capacity not known. 

REGULATION. Flow controlled at intake on Yrio River, some distance above; flow

of Frio River above this diversion probably not regulated. 

ACCURACY. Stage-discharge relation practically permanent.. Rating curve fairly

well defined below 5,000 second-feet. Gage read to hundredths once daily;

one daily gage reading may not be a true index of the, mean daily discharge.

Daily discharge ascertained by applying the gage height to the rating table.

Records good.

Frio Lake is a storage reservoir fed by a diversion from Frio River. The diversion 

is made 1J miles above the Frio River dam and the gaging station on the river. The 

water 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 Fowkrton, Tex., during the year ending

Sept. 30, 1918.

[Made by E. P. Congdon.]

Date.

May 9......:....................................,.................................

Aug. 28.............................................................................

Gage 

height.

Feet. 

0.83

Discharge.

Sec.-ft. 

376

.0

Daily discharge, in second-feet, of Frio Lake, outlet near Fowlerton, Tex., for the year

ending Sept. 30, 1918.

Day.

1... ......

2.........

3.........

5.........

6.........

7.........

8......... 9.......;.

10.........

Oct.

400

Apr. May.

370

800

128

420

800

1.250

460

Day.

11.........

19

13.........

14.........

15. ........

16.........

17.........

18.........

19.........

20.........

Oct. Apr.

35

28

99

9.0

6.2

2.0

1.6

May.

38

o1;

25

5.5

1.8

1.4

Day.

21.........

22.........

23.........

24.........

25.........

26.........

27.........

28.........

29.........

30.........

31.........

Oct. Apr.

1.6

35

12

6.2

2.0

May.

NOTE. No flow on days and months for which discharge is not 1 given.
88

Monthly di,

SURFACE WATER SUPPLY, 1918, PART VIII.

of Frw Lake outlet near Fowlerton, Tex., for the year ending Sept. 

30, 1918.

Month.

April....................................................

July.....................................................

The year ...........................................

Discharge in second-feet. '

Maximum.

400 

.0 

.0 

.0 

.0 

.0 

41 

1,250 

.0 

.0 

.0 

.0

1,250

Minimum.

.0 

.0 .0' 

.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0 

.0

.0

Mean.

. 12.9 

.0 

.0 

.0 

.0 

.0 

6.72 

149 

.0 

.0 

.0 

.0

14.3

Kiln-off 

in acrefeet.

793 

0 

0 

0 

0 

0 

400 

9,160 

0 

0 

0 

0

10,400

BIO GRANDE BASIN. 

RIO GRANDE AT SAN MARCIAL, N. HEX.

LOCATION. In sec. 19, T. 7 S., R. 1 W., at Atchison, Topeka & Santa Fe Railway 

bridge 1 mile south of San Marcial, Socorro County. No important tributaries 

enter near station.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. January 29, 1895, to September 30, 1918.

GAGE. Inclined staff installed January 29, 1895; destroyed by flood fn 1896. Wire 

gage established in its place, at same datum, was soon abandoned and gage heights 

have since been obtained by measuring with a graduated rod from the bridge 

deck to the water surface. Gage datum unchanged.

DISCHARGE MEASUREMENTS. Made from bridge.

CHANNEL AND CONTROL. Sandy and very shifting; broken by several bridge piers. 

No information on control section.

EXTREMES OF DISCHARGE. Maximum mean daily discharge during year, 3,320 

second-feet on May 12; no flow August 6-15, 21-24, August 28 to September 30. 

1895-1918: Maximum discharge recorded, 33,000 second-feet, on October 11, 

1904; no flow for periods during several years.

DIVERSIONS. Considerable water diverted for irrigation above station.

ACCURACY. Stage-discharge relation not permanent; not affected by ice. Owing 

to shifting control, daily discharges are based almost entirely on frequent currentmeter measurements.

COOPERATION. Records furnished by the United States Reclamation Service and 

reduced to three significant figures by the United States Geological Survey.
RIO GRANDE RIVER BASIN. 89

Daily discharge, in second-feet, of Rio Grande at San Martial, N. Mex.,for the year ending

Sept. 30, 1918.

Day.

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.

14

15

16

18

17

16

15

14

13

12

12

14

14

14

14

14

14

14

14

14

14

15

15

22

22

19

16

12

18

24

24

Nov.

**

25

26

27

39

41

48

55

65

128

164

196

259

9J.S

1QO

219

255

291

358

392

% 425

425

/lOC

d.9^

423

422

421

428

435

443

Dec.

468

493

493

452

452

A.V)

508

546

564

427

427

427

322

356

402

448

448

448

488

528

528

AfiK

405

JQQ

473

506 <W4

526

526

526

Jan.

514

508

499

489

J.7Q

469

485

485

485

469

4fiQ

541

477

477

469

473

485

485

485

485

400

280

OQQ

1QQ

OQQ

300

430

660

580

563

519

Feb.

519

463

407

406

405

404

4YVt

404

390

383

376

369

383

OQ7

J.19

414

418

420

422

420

420

420

420

420

430

430

396

361

Mar.

500

1,100

1,290

810

560

'd.*v\

4.T!

 670

790

848

S7<1

900

926

926

820

744

778

sin

847

769

693

617

625

634

642

628

613

CQQ

651

705

758

Apr.

758

736

. 714

711

707

7ftA

693

682

672

590

508

425

446

467

JQ7

522

557

592

629

577

526

475

420

364

308

310

300

238

165

112

May.

230

620

938

1,240

1,600,

2,180

2,280

2,100

2,040

2,100

3,140

3,320

3,120

2,540

2 nnn

2,000

2,000

2,100

2,160

2,540

2,800

2,320

1 OKA

1,810

1,550

1,520

1,480

1,450

1,430

1,300

1,300

June.

1,260

1,160

1.060

930

800

665

665

740

1,160

1,350

1,350

1.760

930

1 040

1^280

1,350

1.380

1,520

1,530

1,510

1,230

1,300

1 000

I'lOO

1,180

840

920

1,020

995

913

July.

670

455

300

220

280

275

360

1,280

1,310

1,150

640

495

420

345

234

200

250

148

150

14?

142

140

140

. 139

170

140

190

285

230

220

186

Aug.

100

100

21

10

5

180

158

68

20

5

145

25

5

-

NOTE. No flow on days and months for which discharge is not given.

Monthly discharge of Rio Grande at San Martial, N. Mex., for the year ending Sept. 30,

1918.

Month.

October. . ................................................

January. .................................................

February. ...............................................

March....................................................

May......................................................

July......................................................

September...............................................

The year.. ......................... _ .............

Discharge in second-feet.

Maximum.

24 

443 

564 

660 

519 

1,290 

758 

3,320 

1,760 

1,310 

180 

0

3,320

Minimum.

12 

24 

321 

198 

361 

415 

112 

230 

665 

139 

0 

0

0

Mean.

15.8 

244 

462 

456 

411 

742 

513 

1,910 

1,130 

365 

27.2 

0

524

Run-off 

in acrefeet.

972 

14,500 

28,400 

28,000 

22,800 

45,600 

30,500 

117,000 

67,200 

22,400 

1,670 

0

379,000
90 SURFACE WATER SUPPLY, 1918, PART VIII.

RIO GE.ANDE BELOW ELEPHANT BTTTTE DAM, N. MEX.

LOCATION. In T. 13 S., R. 4 W., 1 mile below Elephant Butte dam, Sierra County.

Nearest tributary, Mescal Canyon, enters half a mile downstream. 

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. October 1, 1916, to September 30, 1918.* 

GAGE. Stevens water-stage recorder on left bank. 

DISCHARGE MEASUREMENTS. Made from car and cable at gage. 

CHANNEL AND CONTROL. Channel composed of compact gravel; probably permanent;

control is 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 OP DISCHARGE. No data. 

COOPERATION. Records furnished by the United States Reclamation Service and

reduced to three significant figures by the United States Geological Survey.

Daily discharge, in second-feet, of Rio Grande belorv Elephant Butte dam, ,N. Mex., for 

the year ending Sept. 30, 1918.

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.

1,800

1,800

1,800

1,800 

1,800

1,800

1,800

1,800

1,800

1,800 

1,800

1,800

1,800 

1,800

1,800

1,800

1,800

1,800

1,800 

1,800

1,760 

1,760

1,760 

1,760

1,760

1,750

1,750

1,750

1,750

1,750 

1,750

Nov.

........

630

1,000

1,680

1,830

1,830 

1,800

1,800 

1,800

1,740 

1,720

1,720

1,720

1,720

1,720

1,720

1,720

Dec.

1,740

1,760

1,760

1,760

1,760

1,760

1,760

1,760

1,760 

1 800 1,'soo

1,800 

1,800

1 800

........

........

........

........

Feb.

........

1,250

1,590

1,940

2,020

1,950 

1,940

1,940 

1,860

1,860 

1,940

1,940

1,940

1,940

1,900

........

Mar.

i oftn

1 880

1^880

1,880 

i ssn

1,680

1

KA(\

1,540

1,200 

1,200

1,020

695 

695

770

1,020

1,020

1,020 

1,030

1,020 

1,020

1,030 

1,030

1,140

1,070

1,070

1,070

1,060

1,160 

1,260

Apr.

1 380

1,390

1,390 

1,410

1,480

1,650

1,650

1,650

1,650 

1,630

1,630

1,630 

1,630

1,610

1,610

1,590

1 KQO

1,590 

1,480

1,460 

1,340

1,370 

1,450

1,450

1,450

1,440

1,420

1,420

1,420

May.

1,420

1,500

1,560

1,530 

1,530

1,530

1,530

1,530

1,530

1,540 

1,560

1,560

1,530 

1,530

1,510

1,460

1,470

1,480

1,480 

1,500

1,560 

1,560

1,570 

1,570

1,580

1,590

1,580

1,570

1,570

1,570 

1,560

June.

1,560

1,560

1,560

1,580 

1,570

1,590

1,580

1,570

1,580

1,590 

1,580

1,590

1,560 

1,480

1,590

1,570

1,590

1,610

1,610 

1,660

1,710 

1,710

1,740 

1,740

1,740

1,710

1,740

1,160

1,450

1,740

July.

1,720

1,710

1,710

1,720 

1,710

1,680

1,680

1,660

1,680

1,660 

1,650

1,640

1,620 

1,620

1,590

1,590

1,610

1,590

1,580 

1,570

1,560 

1,530

1,540 

1,520

1,490

338

88

430

1,160

1,460 

1,460

Aug.

1,420

1.400

1,510

1,870 

1,780

1,580

1,540

1,500

1,500

1,500 

1,590

1,460

1,450 

1,270

973

453

453

668

964 

1,150

1,130 

1,280

1,160 

1,140

1,240

1,230

1,220

1,210

1,200

1,180 

1,170

Sept.

1,140

1,120

1,120

1,280 

1,280

1 99ft

1,120

1,100

1,220

1,380 

1,260

1,310

1,470 

1,540

1,500

1,490

1,550

1,620

1,590 

1,550

1,540 

749

100 

100

100

454

1,080

1,030

879

830

NOTE. No flow on days and months for which discharge is not given.
KIO GRANDE EIVEE BASIN. 91

Monthly discharge of RioGrande below Elephant Butte dam, N. Mex.,for the year ending

Sept. 30, 1918.

Month.

October. ................................................

November ..............................................

January ................................................

February ...............................................

March .............................. . . . ....... .

April...................................................

May....................................................

July... .................................................

August..................................................

September. .............................................

The year. .........................................

Discharge in second-feet.

Maximum.

1,800 

1,830 

1,800 

0 

2,020 

1,900 

1,650 

1,590 

1,740 

1,720 

1,870 

1,620

2,020

Minimum.

1,750 

0 

0 

0 

0 

695 

1,320 

1,420 

1,160 

88 

453 

100

0

Mean.

1,780 

. 872 

857 

0 

929 

1,230 

1,510 

1,530 

1,600 

1,470 

1,260 

1,120

1,180

Run-off in 

acre-feet.

 109,000 

51,900 

52,700 

0 

' 51,600 

75,600 

89,800 

94,100 

95/200 

90,400 

77,500 

66,600

854,000

PECOS RIVER NEAR DAYTON, N. MEX.

LOCATION. In sec. 13, T. 18 S., R. 26 E., 3 miles east of Dayton, Eddy County, and 

half a mile above mouth of Penasco River.

DRAINAGE AREA. Not measured.

RECORDS AVAILABLE. March 24, 1905, to September 30, 1918.

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, 

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 subject to overflow during extremely high stages. No well-defined control.

EXTREMES OF DISCHARGE. Maximum stage recorded during year, 10.30 feet August 

10 (discharge, 4,970 second-feet); minimum stage, 3.11 feet, July 4 (discharge, 40 

second-feet).

1905-1918: Maximum discharge, 50,000 second-feet, July 25, 1905 (based on discharge at Lake McMillan and includes flow of Penasco River); minimum stage, 

2.45 feet from 11 p. m. July 26 to 1 a. m. July 27, 1916 (discharge, 23 second-feet).

ICE. None reported during year.

DIVERSIONS. Considerable water is diverted for irrigation above station; quantity 

not known. The Carlsbad project of the United States Reclamation Service, 

serves about 20,000 acres in the vicinity of Carlsbad, below the station, and stores 

part of the water in Lake McMillan, 10 miles below gage.

REGULATION. None.

ACCURACY. Stage-discharge relation not permanent; periods of change are covered 

by discharge measurements. Daily gage heights determined by inspecting gageheight graph, or, for days of considerable fluctuation, by averaging hourly gage 

heights. Discharge determined by shifting-control method, or by applying mean 

gage height to rating table. Records fair.

COOPERATION. Complete records furnished by the United States Reclamation 

Service.
92 SURFACE WATER SUPPLY, 1918, PART VIII.

Discharge measurements of Pecos River near Dayton, N. Mex., during the year ending

Sept. SO, 1918.

[Made by engineers of United States Reclamation Service.]

Date.

Get 17..'......

Nov. 2........

14........

18........

Jan. 19........

Feb. 2........

14........

28........

Mar. 16........

29........

Apr. 20........

Gage

Feet. 

,3.20

3.35

3.50

3.88

4.11

4.25

4.62

4.38

3.95

3.59

3.53

3.55

Discharge.

Sec.-ft. 

74

87

111

160

205

206

272

225

159

107

94

115

Date.

May 1. .......

13........

20........

27........

8........

14........

20........

26........

9Q

July 2........

5........

Gage 

height.

Feet. 

3.37

3.22

3.52

3.78

3

Q7

5.75

4.38

3.71

3.48

3.18-

4.83

Discharge.

Sec.-ft. 

94

85

119

190

556

208

91

75

56

45

355

Date.

July 6........

14........

17........

31........

Aug. 2........

10........

20........

23........

31........

Sept. 8........

21........

30........

&,

Feet. 

4.15

3.15

3.09

3.08

5.07

10.3

5.25

4.35

3.69

5.55

3.55

3.36

Discharge.

Sec.-ft. 

191

56

46

45

-IQQ

4.968

379

200

82

511

96

73

Daily discharge, in second-feet, of Pecos River near Dayton, N. Mex., for the year ending

Sept. SO, 1918.

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.

145

137

122

108

93

85

83

84

91

85

80

75

73

73

81

81

74

70

67

67

73

81

82

77

75

76

75

84

91

93

103

Nov.

103

93

93

101

115

123

127

125

116

107

103

103

108

111

117

133

133

132

132

134

144

146

145

147

150

148

150

154

155

159

Dec.

160

165

166

161

159

158

158

157

160

177

196

204

206

194

170

' 186

196

205

181

181

174

172

172

172

204

216

224

224

218

216

220

Jan.

216

220

225

225

230

235

225

224

222

227

283

299

316

333

378

244

208

203

204

204

283

600

620

610

595

410

366

478

398

355

299

Feb.

299

273

244

237

248

248

286

283

257

244

244

239

235

227

219

214

214

219

208

201

200

203

195

188

190

192

179

162

Mar.

160

160

152

149

145

137

137

138

137

137

136

130

119

110

109

108

108

106

106

106

106

106

105

104

102

101

100

100

100

100

99

Apr.

91

92

93

94

92

85

85

85

95

91

92

95

98

95

96

99

97

100

113

116

116

115

110

103

102

97

97

97

97

96

May.

93

93

101

' 109

110

109

113

113

99

95

83

82

82

80

75

74

70

112

135

128

118

114

106

92

86

106

153

152

160

136

133

June.

152

145

179

187

211

1,278

994

785

505

565

455

264

235

204

186

165

145

131

107

90

84

97

118

118

95

82

72

62

57

52

July.

46

44

42

40

254

190

 155

123

102

84

71

56

55

56

58

51

46

47

67

52

45

76

88

64

63

83

67

55

52

53

44

Aug.

42"

256

 208

137

100

75

60

56

60

3,860

2,242

944

535

359

309

351

1,596

1,410

825

525

316

244

202

235

186

152

128

107

101

88

80

Sept.

75

70

70

70

70

77

928

875

725

333

230

191

160

142

121

111

106

100

90

79

85

90

82

82

75

67

65

65

65

73
j|ftwifcl# dttch&pg&af ftsfcr Jfc&er near Dayton, N. Mex., for the yearendw$ Sept,

 ', ' ' ', ,. ..: -.'-..

, . '

 October - > '' ' November ...............................................

Beeamber....... .........................................

January. ..........;......:............................ ^ ..-

February.....................,..........,........;....,.

March..:.................................................

April.....................................................

May... ...................................................

my.^............ .........................................

August ... .. ...............................................

l>isebai

Maximum.

M6

I®

224

636

299

160

116

160

1,278

384

3,860

928

3,860

pgfcm'secemS

Minimum.

«?

93

157

203

162

99

85

70

52

40

42

65

40

-feetv '

Mem.

86.**

127

 tffluft

330

227

120

97,8

107

261

75.1

509

179

101

*offia

aere-feet.

 i

< - '- - i-fc'330

ll'400

1ST*)

12600

7380

5,820

6,580

15,500

4620

31,300

10,700

138,000

PEOOS RIVER AT CARLSBAD, XT. HEX.

-In SE. i«ec. 6, T» 22 S,, R. 27 E., at Green Street Bridge jiajG 

Eddy County, 300 feet downstream from ,Atehison, Topeka & Santa Fe Railway 

stations, 1,500 feet above mouth of Dark Canyon, 2,000 feet below Hagerman dam.

DRAINAGE ABJEA. Not measured.

RECORDS AVAILABLE. May 28, 1903, to March 31,1908, May 13, 1914, to September 

30,1918.

GAGE. Vertical staff attached to the upstream side of middle bridge pier, installed 

May 18,1914; an inclined staff gage at the present site was used from May 28, 

1903, to October, 1904, October ,1904, to March 31,1908, vertical staff gage at the 

same site was used.

DISCHARGE MEASUREMENTS. Made by wading or from bridge.

CHANNEL AND CONTROL. Bed composed of gravel and rock; changes may occ;ur 

after high stages, and slight changes, caused by deposits of sand, have taken place 

during the lower stages. Banks of medium height; not subject to overflow. 

Position of control not known.

'EXTREMES os DISCHABGB. Maximum stage recorded during year,1.5 feet December 

25, 30, and 31 (discharge, 291 second-feet); minimum stage, 1.00 foot September 30 

(discharge, 30 second-feet).

1903-1908, and 1914-1918: Maximum stage recorded, about 21.0 feet Augafit 

7,1916 (discharge, 86,700 second-feet1 ) jminimum occurred in 1918.

ICE. »Hone reported during year. ",

DIVERSIONS. Large quantities of water are stored a few miles above station in lakee 

McMillan and Avalon by the United States Reclamation Service for irrigatiag 

lands near Carisbad. Water is also diverted for irrigation in valley adjacent to 

river above Lake McMillan. Capacity of storage reservoirs in connection with 

the Carlsbad j»ojectj: 58,500 acre-feet. Considerable water seeps into: the xh^er 

between the storage reservoirs and the gaging station, the quantity depending 

on the quantity being used for irrigation between the two points.

REGULATION. Flow at this point completely controlled by storage reservoirs of the 

Carlsbad project.

1 Discharge ftt Avalon dam; reported by engineers of United States Reclamation Service. 

60972 22 WSP 478 7
SURFACE WATER SUPPLY, PAST VHI.

ACCURACY. Stage*discharge relation not permanent. Standard ratiag ct»ve fairfy 

well defined between 50 and 200 second-feet. Gage read to half-tenths once 

daily. One daily reading may not be a true index of the mean daily discharge 

because of fluctuation due to operation of storage reservoirs. Daily discharge 

ascertained by shifting-control method and interpolated on days of no record. 

Records fair.

-height record furnished by United States Reclamation Service. 

. . fHstikarge m«agurements"of Peco* River at CarUbad, N. Mex., during the year ending iStpt.

SO, IMS. . =

/Date.

Oct. 2

Nov. 4

Dee. 22

Feb. 10

Made by Cage 

height.

Feet. 

0,95

.99

.92

so

Discharge.

Sec.-ft. 

83

76.5

57

47.8

Date.

Mar. 24

May 14

Sept. 10

Made by 

A. K. Gowans.. ........

.....do..................

Gage 

height.

Feet. A at

. 1.10

1.16

fife-: 

charge.

See.ft. 

46.fr

ftft J.

72.1

^ 'in second-feet, of Pecos River'at Carfabdd, N. Me®., 'for ike yea? ending 

- ' - Sept.m, 19t8. ' ! - ' ' -. VK

Day.

1..............

' 2i '. <, 4 . ...... . a.............. t::..v.. :-.'.. i.

5..............

6..............

7..............

8..............

.9.............. -to.... ........ ..

ri.f*....'...'....

12. '..\ ..........

13..............

14..............

 15 ' 1 16.'.... .':. .,.'.*'..

17..............

18..............

'lft.->;;.' - . «.,. ."'' 20..............

21..............

22..............

23...,.,..,..,....

24..............

S6...1. ..',..;...

26.:....:....... <V9

28..............

'29..............

Oct.

82

82 

, '82

' >82

82

78

78

78

787*8

' 75

75

75

75

75

72

72

89

86.

' 88

88

87

87,

8685'

84

«3

82

.81

80

79

Nov.

78

7^

75

75

76

76

76

7777'

77

77

78

78

78

114

78

52

78

78

78

78

, 78,

78

78

' 78

7C

78

78

78

Dec.

149

' 78 

32

52

-78

78

78

78

78

78

78 ' 78

78

78

78

 52

78

78

78

78

78

78

78

78

291

78

7878-

^l

291

Jan.

52

78 

114

78

78

78

78

78

78

 78

78

7S

78

78

78

75

75

75

75

75

75'

75

75

75

75

79

en

50

75

75

110

Feb.

110

75 

75

75

!?

92

75

75

75

92

75

75

75

75

75

110

110

145

110

110

92

110

92

92

110

161

106

161

Mar.

106

124 

106

89

89

89

106

89

89

106

142

72

72

124

T2

U ;89

108

138

4670*

86

103

177

100

68

55 ,68

68

68

65

96

Apr.

65

o* 

42

, 131

62

62

92

145

50

62

60 60

32

32

120

58

103

86

,86

' 86

44

11?

44

117

82

120

,fta '42

114

178

'

'May.

92

no

1W

95!,

., %

110

89 88

72

106

' 89'

, 72

106

7&

103

103

70

70

«. 70

103

70

: -TO *&i m"

ro

TO1

103

103

^108

86

103

June.

8670 ite

66

103

103

82

. 82:

68

109

68

10ft

82 ioe

,82

100

100* 

, -100

100

.82"

^ 82'

loo.

100

. '44! -

160 inn

100

100

82

July.

78

i <S5>

78

m

114

6S

.n

65 65

65-

96

78

 96-'

78

65,.

6596' .. M w

63

62

75

62

62

75

82.

62'

62

50 -" 92*

Aug.

' 62-.

-75 ' 62

 n

75

5 S2'

. 62

75

'50

J *<

*,62

.62 ; m

;,, 62

«, 38

, 60

". 60

.<0 '' ' 38

124 "108

, 89 38

, '«Q!

75

89

 89.

SO.

60

06

Sep%'.

60

$

60

60

., 72

89

. 38

48

 58

' 58

70

86

70

70

55

68

68

82

68

 52

,78

96

78

75

75

75

62

30

' NotEi Oct. 19 to^for. 12 and Aug. 19,25, and 26, discharge iaterpoft*ed.
/B2Q,GBAOT^ jRWERiBASIN* . 

Mwtf at fforbbod, N-.\ Mex,,

 '- = '" - - ' - : - Montb. ' 

 <'

outdber.. .......... ....' ........ ....'..;....:.........'..'..

M*rth.. .................... ......................,........>:

Ami!... ...'...-. ...........................................

May......................................................

July........... ...........................................

i.. The year .^ . <. «,*

Dtedwirg»-lfl seeond-teet. ' *'"

,. .., . i. i',.!.,..!.. ...'.;: .., J

Maximum.

& 

114 

291 

114 

161 

177 

145 

110 

103 

114 

124 

96

.291

Minimum,

72 

52 

32 

50 

75 

46 

32 

70 

44 

50 

38 

30

3»

' Meatu.'*'

*tt 

77.7 

07.7 

76.3 

96.5 

 1,92.8 

80.4 

89.3 

89.6 

76.0 

67.6 

66.2

82.4

}i*Baieffln 

aero-feet.

"*' <V*» *,m

6,010 

4,800 

5,960 &9io

4,7% 

5,490 

6,330 

46MJ 

4130 

3, WO

59,790

PIC06 »IVBR NBAK TE3L

LocA'noN. In T. 26 S., E. 29 E., just below Pecos Valley Railroad bridge creasing 

Delaware Creek at its mouth, 2 miles northr of New Mexico-Texas State line,

miles southeast of RfcdKBluff, Eddy County, N. Mex:, an 

Angeles, Beeves County, Tex.

miles northwest of

EECORDIS AVAILABLE. May 27 j 1914, to Sej^ember ^), 1918.

OAGE. rStev*|is continuoius water-sfe^e recorder installed osrer a vertical float box 

drift-boated to lihe first outcropping of rock on the right bank about 600 feet below 

'< railroad bridge and mouth of Delaware Creek.

DISCHARGE MEASUREMENTS. Made fey wading or from cable hjilf a mile downstream. 

D CONTROL.^ Bed and banks composed 6f sarid, gravel, and rock; 

banks not subject to overflow. Control formed by a seises of rapids about 2§0 

feet below the gage; ahiftsi ',"' ' ' ' ,- * >

of DISCHABOB. ^Maximum stage during year, l.TO feet at 11 p. m. Junfe 

6 (discharge, 1,030 second-feet obtained by extension of rating curve and subject 

to error); minimum mean <JaiIy 'stage 0.31 foot, March 1ft (diek^arge 71 secondfeet). . - 

1914-1918: Maximum stageTecorded, 21 .5 feet 10 a. m. August 8, 1916, measured 

by leveling from flood marks (discharge not determined); minimum occurred in

ICE. Stage-discharge relation; not seriously affected by ice; opea channel r»tia| 

curve assumed applicable.

DIVERSIONS. The Carlsbad project of the United States Recfemation Service, wMfe

- reservoirs of a capacity of §8,500 acre-feet, diverts a large part of- the natural runoff above Carlsbad, N"-' Mex/ During the irrigation season « considerable amount

of <his water is returned to the stareana by seepage. There are also other diversions along the stream above the Carlsbad project.

REGULATION. The operation of a water-power plait of 300 norlfepower capacity above 

station, just below Carlsbad, N. Mex., 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 Hie effect of the regulation is 

decreased by return seepage waters, but during the winter the flow depends on 

water released at the reservoirs.
SUBFACE WAfER StlPBtY, 1018^ S"ABT VIII.

AdeuaAC^, Stage-discharge relation chaas?es durin? high water. Curve w«ll defined

, between 70 and 260 second-feet. Operation of water-stage recorder excellent

throughout year. Daily discharge determined by applying mean daily sra^e

height to rating table, except for periods during which stage-discharge relation

was affected by shifting control. Records good.

Discharge measurements of Peeos River near Angeles, Tex., during the year mdiny $®pt. 30,1918. '' "' ."

Bate.

JfeT. 3

Dec. 21 Feb. 9

Mar. 23

Made by 

. do... , ..

A. K. Gowans. . .......

Gage kftight,

Pfd. 

0.48

.43

.44

.50

Discharge.

Seejt.

t4*>

122

139

150

Date.

May 14

28 July 16

Sept. 11

Made by 

R. J. Hanks...........

Gage 

height.

Feet. 

0.36

.34

.47 .'37

<tt* 

charge.

S&Ji.

 «r

81.7

135

104

Daily di , in semisA-feet, of Pdbm Mver rie&r Ang/eleU, Tex., for the year 

Sept. SO, 191$.

Day.

1..............

2..............

3..............

4..............

5..............

6.. ............

7. .............

8............ f .

...............

10..............

 »;. ............

12..............

13..............

14..............

15..............

16..............

17..............

18..............

19..............

20 ..,

31..............

22..............

2334 f -

26..............

»,-....,...... 

27..............

28......... . ..

29..............

80.... ..........

31. ..... ... .

Oct.

172

166

172

166

161

166

161

166

161

161

151

151

142

137

132

132

132

137

132

142

137

132

132

199

122

137

142

132

156

188

156

NOT,

151

142

146

156

166

161

166

187

172

151

140

151

142

146

142

166

198

161

132

118

118

142

151

187

137

142

166

137

151

Dee.;

172

156

156

203

198

198

166

182

192

161

172

161

198

166

122

132

146

137

156

161

132

177

166

177

166

187

182

177

142

187

243

Jan.

232

226

198

161

£43

220 9ns

187

198

1 TO

118

118

127

232

156

156

127

11R

156

172

166

177

298

203

182

208

203

187

226

243

Feb.

243

249

; 236

298

19*

166

166

161

127

146

151

137

113

122

132

132

142

161

161

166

177

172

192

102

177

255

317

288

. Mar.

208

198

192

187

177

182"'

177

166

101

r 127

, 1S7

132

127

146 113-

127

100

71

75

92

132

156

1AA

161

146

151

146

151

156

161

Apr,

IW.

156

156

161

Ml

166

166

. 1M

tee

173

141

, 172

172

161

151

. 161

life

156

156

ISA

W

146

127

W7

127

113

104

100

104

92

Mas.-

93

104

122

122

108

92

88

79

79

83

83

96

104

92

104

100

198

108

96

96

96'

100

104 '108

127

122

122

79

108

108

104

June.

104

108

108

108

118

156

238

137" 182

132

127

118

118

113

118

122

127

132

, 122

127

127

132

188

118

118

187

132

132

132

July.

127

132

127

122

122

' *127

127

122

122

137

118

132

142

142

137

132

113

168

m

104

132

118

132

172

151

156

186

140

156

232

Aug.,

292

192

182

187

177

172

168

161

10$

lit

 261 .||6 m

137

134

131

129

187

113

100

104

US

118

122

127

142.

151

177

208

214

gas

Sept.

-1*9

' ' 243

r «2

214

*»

in

182

W

151

118

108

137

146

148

142

146

146

146

146

101

141

132

143

187

142

m

122

151

148

151

NOTE. Discharge determined by shifting-control method Oct. 1-20 and Sept, 1-20. No record, Aug. 

15-17; discharge interpolated.
Monthly discharge of Ptco* Itivernegr Anffelee,.Tex. t far the year ewi

 ', , ', > Month. f .

QfA^ixs..^,............... ..............................

Tto0BEdb«t. ...............................................

February.... . .

«S3K::::::::::::::.::::::::::::::::::::: ;:::::::::::

AwU.. .................................................. May.. . . . <".

July...............................................!.:..:

September ..................... ., .........................

Dischai

lif ftylmwn t

19S

^

243

298

317

208

172

127

238

232

292

249

317

rgeinseoon<3

WinfoniTm.

122

113

m

118

113

71

92

79

104

100

100

108

71

_f AflJ. ( WjBlr*

Mean.

14?

1»

w1® ' t§»

146

147

Wt

130

134

MO

1S9

151

- , ;v- > 

Ban-oft to

, 9G!MMp66£»

»«»

8 99^ 10* IK*

11 JHr

10* WOT

8,980

8.7GO

&3»

f,M0

8,»»

9,840

,»,486

110,080

PECOS RIVER 4BOTE BARSTOW, TEX.

LOCATION. ^hree-quarters of a mile below head gate of Biggs irrigation project, 1 

mile east of Patrole aiding on Pecos Valley Railway, l£ miles above head gate 

of Baretow Irrigation Oo.r 10 miles northwest of PecoS, and 14 miles northwest o! 

Barstow, Beeves CouMy.

DJJAINA.GE ABBA, Not measured.

RECORDS AVAH,ABI». ^Febnisiy 1,1916, to September 30,1918. :

GAGE. Stevems waternstage recorder on right bank.

DISCHARGE MBASXJRBMENM. Made by wading or from cable 150 feet below gap!

CHANNEL AN$ CONTROL. -Channel straight 100 feet above and 300 feet below station, 

Bed composed of gravel, clay, and sand; not permanent. Bight bank is clay, 

clean, andfairlypermanentileft banklooseand covered withsaltcedarjboth banks 

are overflowed at gage height about 10 feet. Shoal 250 feet below gage serves as 

control; shifts during high water.

EXTREMES OF I>ISCHAR»E. Maximum stage during year 2.58 feet at 3 a. m. January 

15 (discharge, 176 second-feet); minimum discharge, May 2-5, 25 second-feet.

1916-1918: Maximum stage, 12.1 feet at 6 a. m. August 10,1316 (discharge not 

determined); minimum stage, June 24,1917,0.88 fool (discharge, 22 second-feet),

I<S)B. Nune reported during year!

DIVERSIONS. In addition to water stored and lands irrigated in New Mexico by th* 

Carlsbad project of the United States Reclamation Service, some lands in Texaa 

. are irrigated just above the station. Considerable water is returned.to the river 

by seepage below the reservoirs. Tbe second report of the State board of water 

engineerp fihows 28,800 acres declared irrigated above the station, the quantity 

of water assumed to be 86,400 acre-feet.

REGULATION. 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.

AemrRAeT. Stage-diaeharge relation was not permanent. Bating curve well d0i»*d,

-: below 700 second*-feet and poorly defined above. Mean daily gage

< mined by inspecting the gage-height graph, or, for days of considerable

tion, by averaging the hourly gage height. Breaks is gage-height records caused 

by collection of silt in float box and by clock's stopping; records poor.

 discharge ascertained by shifting-control method.
SURFACE. TOMfcBl ttfRT VIII.

Discharge iktetfittemmte ver^bon Beabtow, Tbx., 

SO, 1918,

Date.

NOT. 2

Fjftb. . 8

tfyftf. 22

May 12

Made by 

E. PtCongdott.........

A. £ Gowans. 1 .......

E. ^Oongdon. . . ......

Gage 

heigfit.

Feet. 

1 93

n 10

2.08

1.20

1.30

Dlacharge.

Sec.-ft. 

91.2

117

117

44.4

W R

Date.

May 29

39

July 6

Sept. BO

Made by*-

E.J.Hank.. ..........

R. 7. Hank.... .........

A. K. Cowans.........

Gage

height.

ftet. 

1 34

1 'l£

1.04

1.20

Discharge.

Sec.-ft.

t

f

*

^.»

e, in second-feet, of Pecos River above Barstow, Tex., for the year 

' ' " Sept. $0, 1918.

ending

! Day.

1... ...........

2..............

3..............

4..............

5..............

7 '

8..............

9..............

10..............

11..............

12........ ....

13..............

14..............

15, ,,,... ...«,.-

16, .....,, ...,, 

17.............. 18. u-J. .....,-.'.-.

19.. ........... 29...:..........

21..............

22..............

23*...:/ ........

25..............

27.. ..,..,....,..

28........!.....

29

30.............. Will.:.. .......

Oct.

102

94

88

86

83.

flft

76

75

77

79

81

83

84

81

on

36

S3

80

77

74

71

69

.68

65

62

60

61

61

62

, 64

f 75

&OV.

84

82

80

82

84

Oft

92

94

95

88

81 .

74

67

60

; gg

ino

166

85

75

94

96

91

Sfi

91

103

90

99

Dec.

OQ

102

-105

111

114

110

106

104

104

104

IfU

111

11S

125

123 

121

 119

117

nr

110

114

108

116

111'

. 107

107

111

106mJan.

S3

114

,, 42S.

«r

116

0*9

101

114

10S

so

63

61

78

147

, 136

<TO4

' 91(W

95

117

11! -.2%

185

127

119

114

Feb.

160

160

i6a

155

140 ifa

112

111

119

119

Iftft

,106 

107

108

110 118'

114

128

127

m

1

123

120

m

90

,

Mar.

156

116

iTO

Oft

9391'

,90"01

84

SO

. . 78

74

70

67

 .(65. 

61

535tf'

4"7

44

44

63

77

7ft

79

70

64

. 62

Apr.

59

61 **- $A3

62

0A

6fi

' ! 65'

65

61,

64

69

72

. 61-

Kft

55

63

m

72

 n

72 " 7ft

65

69

May.

70

25

^25

25

60

66

00

60

60

60

59

49

$0 

49

50

50

' ' '53

 ' -84'

72

* 54

lot

91

; 72

66,

68

48

June.

37

,. 38

' 40

39

' ' *5z

113

96

80

64

: 52,

52

^ 52.

. 52

aa

52

52

52

52

m

51 '51

4B -

42 ! 45

- r 46

46

July.

39

42

44

44

41 "* "44'

, ; 45,

44 it

44

44

. 43-

44

43

49 "'60'

48

48

49

49

6S

;-. SO

48 48

Aug.

45

45

44

44

50

53*

§

.

/ "fly**

' 58*

, 59

59 ' Si

58

58

, . gy

57

"' '56

55

" .-.6R

 , 64'

' '" !^

f

, "

65

Sept.

56

V7

57*&.

5»

 1

61

62

63

^i 6S

57

' g

.,: 68

, 70

' 69

."' 71

71

n,

- 7fr!

, 70

72

76

'' 74

6T

M

JfofS^NoreoooJ Oct. 8-13,17-20, Nov. ,4-17, »«S5. 2-5, 7-*»00~ll» 1&-19, F«b. 1-7 

Aug. 6-li, 13-27, 29-31, Sept. 1-9. Discharge on these 4ates determined by a stti 

BtrM «(t Ang^te and data lurnisiied by engineers and obserrw. .-*,,,,« -

Monthfy discharge of Pecos River above Sarstow, Tex., for the yea,r'<fndin$8^pt, W,

2-11,

I . i t Month,

January

JariL............................................. .......

Vtov ' : i; " .' . i « 

Jmie....... ...................................... :........

July... ..................................................

September...............................................

Discharge in. second-feet.

Matfinium;

. 192 

109 

125 

147

'178 

156. 

76 

101 

; 112 

68 

59 

76

170

Mlninmm.

69- 

60 

87 

61 

99 

44 

55 

23

f .. 37

44

56

25

 Mean.

,. , 76.6

106 124.' 

76,2, 

65.4

53! 2 4T.I ' 

54.2 

64.6

76.4

 4740 

5,180 

8^760

; , , 6» a*>

3^450 

3,170 

2,900 

3,330

55,300
 PXCOS RIVSm HEAR O&AKZ>FAX^8> TEX, - .[-

LOCATION. At site of old highway bridge where Grandfalls-Fort Stocktoa road for- 

,merly crossed Pecos River, 1J miles upstream from present Grandfalls-Fort 

Stocldon road crossing at Iron Bridge, 2 miles below diversion dato for silt-line 

canal of Imperial Irrigation Co., about 3 miles south of Grandfalls, Ward County, 

4& 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, 1918. Records were 

taken at Iron Bridge, 1} miles downstream, from November 6,1915, to August 3, 

1917. Discharge at both points believed to be the same. ' ' v "a

GAGE. Stevens water-stage recorder attached to downstream side of old bridge pier 

near left bank. Prior to August 9, 1917, a Stevens water-stage recorder was 

operated at Iron Bridge, but that site was abandoned because of backwater from 

Zirumerman dam. Relation of gage datums not known.

DISCHARGE MEASUREMENTS. Made from cable 50 feet above gage or by wading;

I during extreme stages from Iron Bridge.

CHANNEL AND CONTROL Bed solid rock, clean, smooth, and permanent. 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, are subject

to overflow. Rock ledge extending diagonally across stream iust below gage

serves as low-water control.

EXTREMES o? DISCHARGE. Maximum stage recorded during the year, 0.96 foot 

8 p. m. April 6 to noon April 7 (discharge, 71 aecond-feet); minimum stage, 0.36 

foot March 30-31 and April 23-24 (discharge, 2.6 second-feet).

1915-1918: Maximum stage, 12.8 feet (old gage datum) at 8 a. m. August 29, 

1916 (discharge, 4,370 second-feet, determined from extension of rating curve and 

subject to error); minimum stage, 0.38 foot (old gage datum) 1 a. m, April 17, 

1916 (discharge not determined, but less than 0.7 second-foot),

ICE, None reported during year.

DIVERSIONS. Station is 2 miles below diversion of silt-line canal of Imperial Irrigation Co., 18J miles below diversion for the Imperial reservoir (17,000 acre-feet 

, capacity), 15} miles below diversion for Grandfalls project, and 4} miles above

f.. diversion for Zimmerman project. Available data show approximately 143,000 

acres are irrigable between,station and lower limits of Carlsbad project of United 

States Reclamation Service. Second report o! State Board of Water Engineefis

- shows total of 58,000 acres declared irrigated in Texas above the station, ttie 

amount of water required assumed to be 174,000 acre-feet. The effect of diversions is to some extent counterbalanced by water returned to* stream by Seepage.

REGULATION. None beyond'that? caused by diversions for irrigatioa.

AocuRAcr.-VStage-discharge relation permanent. Rating curve well defined below 

75 second-feet. Gage-height record good. Mean daily gage heights obtained by 

inspecting gage-height graph, or, for days of considerable fluctuations, by use of 

planimeter. Daily discharge ascertained by applying mean daily gage height to 

rating table. Records good. . , I
100 SURFACE

Discharge measurements of P,ee®i Riser

Sept. SO, 1918.

, P^BT Vltf, 

.v Teg*? during the,ymr

Datq.

Nov. 6

Dec. 22

Feb. 11

Mar. 25

Made by 

E. P. Congdon.........

Gage 

height.

Pea. 

0.50

48

.41

OQ

Dischctrge.

O K

A *>

9.3

2 7

Date,

May 12

30

July 17

Made by 

.....4o.. ...............

Gage 

Height.

JW» 

0.38

.41

.«6

Disdwrge.

Vl

4.6

6.2

Daily discharge, in second-feet, of Pecos River near Grandfalls^ Tex.,/or fhe yew 

i Sept. SO, 1918.

Day.

1..............

2;.. ...........

3..............

4... ...........

5.... ..........

: 6....... .......

7.... ........ ..

s........ ......

9..............

10..............

11.............. is...... .........

13..............

14..............

15..............

ie... ...........

17..............

18..............

19.. ...1. .......

20..............

21..............

22..............

at

24..............

25..............

86....,,....,...

yr... ...........

28 ,

29..............

S0....i.........

3JU.... .........

Oct.

8.4

8.4

9.0

9.0

9.0

9.6

9.0

9.6

10

11

9.6

9.0

10

9.6

9.0

S.6

11

11

10

9.6

9.0

9 6

10

9.6

9.0

9.6

9.6

10

10

9.&

9 n

Xov.

8.4

8.4

7.2

8.4

9 0

9.6

11

11

11

10

. 9.0

8.4

7.2

6.0

5.7

5.4

8.4

7.8

5.4

6.6

6.6

7 ft

8.4

6.6

6.6

10

10

11

12

1&

Dec.

9.6

6.0

6.6

6.0

8.4

6.0

7.8

5.7

6.7

5.4

5.1

5.4

5.7

7.2

6.0

6.0

6.0

6.0

6.0

6.6

7.2

6.0

5.7

5.1

5.4

5.1

4.9

5.1

5.1

4.8

5.1

Jan.

4.8

4.8

5.1

5.1

5.1

5.1

5.1

3.6

3.3

4.2

4.5

4.5

4.2

3.6

3.0

3.3

3.3

3;6

3.6

3 9

4.2

3 9

3.6

,,3.3

3.9

4.2

3.9

3.6

3.6

3.6

3.6

Feb.

1 O

4.2

4.2

4.2

A 0

4,2

5.4

4.8

3.9

2.9

3.3

3.0

2.9

2.9

3.0

2.9

3.0

2.9

2.9

2.9

3 A

3.0

3.0

3.0

3.0

3.0

3.0

Mar.

i n

2.8

2.6

2

ft

2 7

, 2.7

2.7

2.8

2.8

2.8

2.8

2,8

2.8

2.8

2.8

2.8

2.8

2.8

9. S

2.9

Q n

2.9'

2.8

2.8

2.8

2.8

9 ft

2.7

2.6.

ft ft

,<pr.

2.8

2.9

3.0

5.1

21

37

45

29

31

31

31

32

31

31

29

29'27

26

16

14

13

11

2.8

2.6

2.9

2.9

2.8

2.6

2.8

2.8-

May.

2.8

3.6

4.2

3.9

2.8

3.9

4.5

5.7

4.8

' 4.8

3.0

2.8

18

2.7

2.7

2.8

2.8

2.8

a. 9

3,$

2.7

2.7

2.8

2,7

2:8

2.8

2,8

2.9

3.0 '-8*0

4.5

June.

3.6

3.0

2.9

3.3

3.6

5.1 f

7.2

9.6

12

11

11

10

9.6

9.0

9.0

9.0

9.6

9.6

&»

8.4

9.0

9.0

9.0

9.0,

«.er

8.4,

8.4

8.4

8.4

July.

8.4

8.4

7.2

7.2

7.2

S.6

6.0

6.6

6,0

&6

6.6 6.6*

, 6(0

'flirt

6.6

6.6

«.o

6.0

6.9

6.6

ft.0

6.0

6.6

7.2

6.6

6.6

«.6.

6.0

5.4

-.5.7

6.0

Aug.

6.0

8.0

6,0

6. ft

7.2

9.0

10

10

»

12

12

11

12 '12

12

12

13

17

18

18

1»

1?

1?

19

IS

1(fV

IB 1

16

16

15,;:

14

Sept.

13

18

14

14

16

 17

. 17

16

18

18

18

" 1«

17

17

17

19

17

16

14

16

»f

17

18

18

18

* 19

20

20

19

19

Monthly tKidwege of Pesos River new Grand/alU,. Tex,, for the year ending Sept. SO, 1918.

Month.,

October. .................................................

March...................................................

April.....................................................

July.....................................................

September ...............................................

Pischarge in second-fleet,. 

Maximum11 

12 

9.6 

5.1 

5.4 

3.0 

45 

5.7 

12 

8.4 

19 

20

45

Minimum.

' - 8,4 5.4' 

4.8 

3.0 

2.9 

2.6 

2.6 

2.7 

2.9 

5.4 

6.0 

13

2.6

Mean,,.

9.56 

8.90 

6.04 

4.04 

3.41 

2.79 

17.3 

3.28 

&08 

6.53 

13.0 

16.9

8.28

Run-off m 

acre-feet.

588 ' '' 608 

371 

248 

188 

172 

1,038 

202 

481 

402 

799 

1,010

6,000
.' v ' T.<MD ,

MOM ELVBB

.Basis.

OOMSTOOK,

LOCATION. At Pecos high bridge of Galveston, Harrisburg & San Antonio Railway 

5 Co., 11 JBofles west of Comstock, Val Verde County, 18 miles east of Langtry, and 

* * *i4 miles by stream above confluence with Eio Grande; below all tributaries. 

DRAINAGE ABBA. Not measured. 

RECORDS A-VAttAMd$.> May 1, 1900, to September 30, 1918. (Also gage heights for

GAGE, Vertical staff' attached to the 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 about 300 feet deep. 

Stage-discharge relation at the lower stages changes slightly. . ,

EXTREMES o# DISCHARGE. Maximum stage recorded during year, 6.90 feet at midnight August 15 (discharge, 7,140 second-feet); minimum stage, t-0,12 foot July: 

29 to August 1 (discharge, 106 second-feet).

1900^-1918: Maximum stage recorded, 35.75 feet April ,6, 1900 (discharge not 

determined); minimum occurred in 1918.

ICE, None reported during year.

DIVERSIONS. Considerable water is diverted and stored above the station for irrigation. Lake McMillan and lake Avalon of the Carlsbad project of the United 

States Reclamation Service, having a combined capacity of 58,800 acre-feet, ar& 

situated 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 Baretow and GraodfaHs, Tex. There are no diversions below the statioa. Return waters tend to equalize effect* of diversions in 

lower part of drainage basin.

REGIOATION. Yearly run-off at this point controlled by storage and diversions rfor 

irrigation above station.

ACCURACY. Stage-discharge relation subject to change. Gage read to hundredths 

twice daily; mean of two readings may not be a true index of mean daily discharge. Rating curve well defined between 100 and 4,000 second-feet. Daily 

discharge ascertained by applying mean daily gage height to rating table and 

by shifting-control method. Records good.

Discharge measurements of Pecos River near Comstock, Tex., dwrmg the year

Sept. SO, 1918.

Date.

NOT, 13

J»a. 16

Mar. m

Made by 

H.T.Dodd.. ..........

.....do... ...............

.....do..................

Gage 

hSght.

Feet. 

0.22

.28

.18

Discharge.

See.-/*. 

167

205

164

Date.

June 1

Made by 

H.T.Dodd............

Gage height.

Feet.

Or 10

.02

DIsefcatge.

Sec.-ft. 

142

196

'Published t&«artter reports as Petes River near Moorehead, Tex.
Daily discharge, in necon&Jbdt,

Sept. SO, 1918,

., for the year en&ng

D»y., r

1. .............

2......:.......

3..............

4..............

5.. .i. .........

6..............

7..............

8.............. 9... l.....:..v.

10..............

11..............

12..............

13..............

14............... is......::......

16..............

17..........:...

18..............

19..............

20..............

2i.,..........:.

22...... j.......

23.............. a*ik . ...........

25..............

26..............

27..............

28..............

29..............

30..............

31..............

P»lj«

152 J l58

158

158

152

158

15$

,158

1SS

158

162

160

155

155

155

160

1«0

155

155

148

152

158

152

162

152

158

158

158,

158

158

158

Nov.

162

1 162

162

162

 JjQg

162

162

168

168

170

168

168

168

168

168

175

170

170

ISO

180

: 'l80

185

illMf

185

190

190

192

102

Dec.

195

195

lQ*i

195

195

1QR

195

1«M

IQfi

. 198,

-ino

198

195

,198

198

198

, 1AQ

198

202

198

300

202

200

" 2ft&

205

200

20$

200

200

290

9nn

Jan.

 200

200

200

200

205

205

200

200

OA£I

OAA

200

200

300

200

202

200

200

200

202

202

202

200

305,

205

205

2ft5

209

200 202.

202

Feb.

, 200

Oflft

(VV)

ortA

fWA'.

200

203

ono

200

20Q

200

200

I)/U\

200

200

200

OAA

202

202

1 200

200

200

300

200

200

200

IQft

.......

"! 

Mar.

toft

lino

1k»S

198

198

IQfi

200

2n<lf

ston

i»

lOft

I Oft

,195.

ISTl

IQft

-*an

IRA

ISO

180

' ISA

178

- 178

175:

175

175

175

175

175

175

17S

Apr.

172 " 170

170

170

172

172 172'

170 175 '

175

175

175

180

1CA

178

175 175'

,172

170

155

155

155

155

155

155

155

155

155

155

156

May.

160

160

QQ7

277

259

O&tk

235

205

200

: 185

178

170

160

155

155'

193

220

1*0

175

162

172

178

17&

175

,165

155

155

155

145

155

Jiine.

, 155

155

155

155

,155

' 158

 202

1' OSft

2; 138 i Tan

516

415

396

, 265 '> 265

253

235

flt^J

205

200

195

192

192

180

175

170

155

155

165

J4t

155

182

150

150

142

142

142,,

142 tio

111

140

135

132

t ttt\

130

130

130

130

130

1OA

 > 114

114

114

114

114

114

114

$T

101

106

'tifo

108

1*4

114,

114

It4

114

U4

111

130

iln

130.

130

132

, 126

6,290

1,390

443

312

256

agfi

208

180

ISO

178 ' iHf

178

175

,175

m

185

155

71 «% 

^eptl

|<|n

1W15$.

155

 155

155-

, 155.

168

395

180

- 15&

155

155.

155-

155-

155-

155-

1S5 155- ies

; 155-

155 130-

,i 165^

155

155 130*

i 130*

" 130-

130-

i

 _, . : ;

NOTE. Oct. 1 to Dec. 20 discharge determined by shifting-control method. *. .. ; '* 

MontMy disehopge-of -Pteos Rwer neat Gamstoek, Tex.,for the year ending Sept. 80, 1918-

Month.

October ..................................................

November ...............................................

February.......... .....

April............. ........................................

May..

June « . . i" »...,

 Discharge in second-feet.

Maximum.

162 

192 

205 

205 

202 

200 

ISO 

397 

3,950 

 155 

6,290 

205

6,290,

Minimum,

148 

162 

192 

200 

198 

175 

155 

155 

155 

106 

106 

130

106

Mean.

156 

174 

198 

201 

300 

187 

167 

190 

456

218,

, Knn-off 

" #n 

acre-feet.

9,590 

10,400. 

12,200'

ujw& 0,940" 

11 TOO

;: .27,100-

I58t000»
 - "* J&feli fcHnfer Mltta* itttf MfefetfMk*' 11/

Prom May 28 t»i3ftoatudy ofloeees and gains from seepage was mad« oa %»$ I$f«rer 

between the Hew Mexico-Texas State line and Giryin, Tex. p A^tQm»l4c j|ige8 ar^ 

maintained .at Angeled (near State line), above Barstow, and near Grandfalls. Although data were insufficient to warrant a correction of discharge ior time interval, 

the gages showed that the river was at a practically constant £tage previous to and 

during the investigation so that few corrections for time interval were necessary.. 

From Angeles gage to the Arno-Porterville highway bridge there was a gain of 25 

second-feet; from Amo-Porterville highway bridge to Barstow gage there was a loss 

of $p second-rfeet, and between Barstow and Girvin a gain of 48 second-feet. Between 

theAmo-Porterville highway bridge and Barstow the river, floors over a bed otdee|f 

sand, the seepage into which, and the natural loss from evaporation might easily 

account for the' loss of 30 second-feet between these points.

Seepage measu?'emends, in geco&d-feet, on Pecos River from New Mexico-Texas State line

 ';.: '..,."."' to beloio Gttrwn, Tex., in May, 1&18.

1 ..<;r ' k,~t

Stwani or diversion.

£«*os River.... ^,..

Do......;,.,...

Do.......' .,

DO..........C..

ent cansd.

Barstow canal. .. . . .

PceoBEiver........

Do.............

Do.............

Do.............

Toyah Creek.......

feeder canal. 

Peeos River........

Do.............

Second Imperial 4 ivwsion. 

Peoos River. .

Do.............

XimTDwrnftTi cftnal

Peoos Eivcr........

Do.............

Peoos RiVer. .

,, ,t. 

Loca^on.

/ . a

'Neir - : ' JUiaefes i stacing ^mtlof^^- ^^ 

Olds raSca, Anieles. ....

'J^rton., ...... .........

Above Barstow gaging

station. 

Head gate......... ......

Below Barstow diversion

Above Margueretta

flume.

ftUPQGL@<

Texas & Pacific Railroad bridge. 

Mouth. .................

Just below Big Valley

dam. 

Mouth..................

Below Imperial feeder

diversion. 

Below Grandfalls diversion, dam. 

Head gate.. ...........

diversion. 

Near Grandfalls gage. .

Head gate.... ...........

version.

Month... . .

A]> proximate distance iti 

miles.

0

22

43

56

75

85

86.5

86.5

90

90

102

112

117

130

134

134

137

150

150

154

160

160

180

1QQ

9H3

Date.

28

29

29

29

29

29

29

29

29

29

29

29

29

29

30

30

29

30

30

30

30

30

30

30

30

Discharge 

of main 

stream.

81.7

78.9

86. 8

107

645

1.7

2.9

4.1

5.0

13. i.

9.0

8 1

3.4

4.6

0

16.0

30.4

Inflow.

 t

0

0

0

Diversion.

12.5

RA A

15.5

4.2

2.5

Section 

gain or 

loss.

-is

4-12.9

+28.2

-30

'+ i:r

+ 1.2

J- 1 9

+ .9

+ 8.1

+11.4

- .6

 a

+ 1.2

- 2.1

+16.0

+14.4

Total 

gftin or

.loss.

: ' 7.8

'+ 5.1 +ISi.r8-

- 4.r

-8.1

- l.»

 T

+ .2-

+ 8.*

+19.7

+19.1

+18.3^

+19,5-

+17.*

+33.4

+47.8
StJHFXCE WATER SUPPLY, 1$9, PABT 

MISCELLANEOUS MEASUBEMEJSTTS.

Measurements at points other than regular gaging stations are 

tinted in the following table:

Miscellaneous discharge measurements in Texas during the year ending'Sept.* 80, IMS.

Date.

Jao. 11................

Feb. 20......;.. .......

27................

Mar. 7................

20................

27................

.Aug. 1. ...............

6................

16................

21................

22................

22................

22................

22................

22................

. 23................

26................

25................

Stream.

Neches River

do............

.....do............

San Bernard River

Little River.......

.....do............

.....do............

.....do............

.....do............

.....do............

.....do............

.....do............

.....do............

.....do............

Riverside canal . . .

Geronimt) Creek. . .

Tributary to 

.....do............

.....do............

.....do............

Locality.

6milesaboveBeattmont.Tex.

Above Aostfe dam..........

.....do......................

.....do......................

5 mUes southwest oiD&moB

oil field, Tex. 

3 miles southeast of Little

River, Tex.

1| miles above Austin gage. 

800 feet below Austin dam. . .

125 feet above Austin data. . .

.....do......................

Tex.

Tex- at Hedwig mill.

125feet above Austin dam. .

4 mites west of Eifle Lake,

Tex.

crossing.

£&..

*"£ 

. 188 * 

128

 188-'

17.0

65.6

73.1

32.7

36.9

15.4

10.2

ftl

<U

5.5

" $i

<»2.0

? $

7sis

Discharge estimated.
INDEX.

A, Page.

Acre-foot, definition of.. ..................... 2

Aoeuracy of data and records, degrees of..... 4-5

Angeles, Tax., P«cos River near............. 95-97

Appropriations, records of.... ............... 1

Austin dam, T«?., Colwado River at ....... 104

Austin, Tex., Barton Creek at........ ....... 57-68

CoktfftdaBivarat. ....................... 28-30

cooperation by. .......................... 5

, evaporation near. ........................ 30-31

Authorization ot work. ....................... 1

B. 

t B8|itoger,Tex., Colorado River at........... 22-23

Barstow, Tex,; Tecos River above. .......... 97-98

Barton Creek at Austin, Tex..., . ..... ....... 57-58

Beaumont, Tex.^'echee River near......... 104

Btaffton, Tex., Colorado SWet, at.... ........ 104

Board of Water Engineers, cooperation by. . 5 

BmosjRiverat Brazos, Tex................. 10-11

at Waeo.Tex.... ......,.....'............ 11-13

Clear Fork of, near EUasville, Tex. ....... 16-17

near College Station, Tex. ............... 14-15

near Graham , Tex ....................... 8-9

Brazos River basin, gaging-station records in 8-19 

Bridgeport, Tex., West Fork of Trinity River

at............................... &-7

Bronte, Tex., Colorado River near. ......... 20-21

Browawood, Tex., Pecan Buoy at. ......... 45-46

Calaveras, Tex., San Antonio River at. ..... 73-74

Callallen, Tex., Noeces River at............ 82-83

Cameron, Tex., Little River at. ............. 18-19

Caflsbad, N. Max., Pecos Kiver at. .......... 93-95

Castell, Tex., Llano River at................. 104

f*adwick,JTex., Colorado Kiver neat........ 24-25

Cinonia, Tex., Nueees River near. . ., ......... 77-78

College Station, Tex., Brazos River near..... 14-15

Colorado River at Austin data, Tex.......... 104

at Austin, Tex.. ......................... 28-30

atBaffinger.Tex.. ...................... 22-23

at Bluffton, Tex., ...................."... 104

at Columbus, Tex........................ 31-33

at Deep Eddy, Tex...................... 104

at Marble Falls, Tex.. ................... 26-28

at Wharton, Tex........................ 38-34

near Bronte, Tex ........................ 20-21

nearChadwick, Tex.............. ....... 24-25

Colorado River basin, gaging-station records

in............................... 20-58

Colorado River seepage investigations. ....... 34^36

Columbus, f ex.jfcolorado Kiver at. .......... 31-33

Comfort, Tex., Guadalupe River near ........ 59-6tf

Computations, results of, accuracy of ........ 4-5*

> Comstock, Tex., Peeos Kiver near. ........ 101-102

Conch.0 Rivet aeai Paint Rock, Tex.......... 40-41

near San Angelo, Tex.................... 38-39

Pa<?e. 

Concho River seepage investigation*........ 42-46-

Congdon, E. P., work of..................... 5-

Control, definition of........................ 2"

Cooperation, reeoid of........................ 5

Corpus Christi, Tex., oooparation by......... A

Cotulla, Tex., Nueees River near............ 79

Cuero, Tex., Guadalupe Rjlver.belojr,.....'.... ,65-ft8

Current meters, Price, plate showing......... -2

D.

Damon oil field, Tex., Ban Bernard Riv«r > 

aear.................i........... 10*

Data, accuracy of.............:... ........ I.; t-6

explanation of.....................,..:.. 3-4

Dayton, N. Mex., Pecos Riveraew. >..-; ........ 91-»»

Deep Eddy, Tex., Colorado Riv«if at......... 104

Definitions of terms......................... Z

Derby, Tex., Frio River near................. 83-S5-

Dodd, W. H., work of....................... 5

Eagle Lake, Tex., Riverside canal neat......

Elephant Butte Sam, W. Hex.; Rio Qrande

EliasviUe, Tex., Clear Fork of Brazos River

near ............................. 16-1T

Ellsworth,C.E.,*ork of... ................. 5

Evaporation near Austin, Tex. ............. 90-81

F.

Fowlerton, Tex., Frio Lake outlet near....

Frio River at............................ 85-86

Friezwa1;er-stagerecorder,plateshowing....." *

Frio Lake outlet near Fowlerton, Tex......1:. 86-88

Frio River at Fowlerton, Tex................ 85-88

near Derby, Tex......................... 83-85

6.

Gaging station, typical, plate showing........ 2

Geronimo Creek at Seguin-Martindale K»d

crossing, Tex. ..............^.... MJ4

Gonzales, Tex., Guadalupe Eiver near....... ®g*6iGowans, A. K., work of........../.........,. &

Graham, Tex., Brazos River-near-.......... 8-fl*

Grandfalls, Tex., Pecos River neaz.,....... 89-100-

Gray, Glenn A., workof..................... 6-

Guadalupe River at New BraonfeSs, Tex.... «l-«2-

below Cuero, Tex,......................-_6H>$-

near Comfort, Tex....................... 69*60-

near Gonzaies, Tex......,.-...,,."...

Guadalupe River basin, gaging-stationrecords 

in...............................

Gulf, Colorado & Santa Fe Railway, cooperation by..........................

Gurley printing water-stage recorder, plate 

showing............. .......

106
106 IND1X.

H.

Hank, Russell J., work of.

I.

Imperial Irrigation Co., cooperation by..... .' .5

International & Great Northern Railway,

cooperation by................. ftJ.

Junction, Tex., Llano River near............ 54-55

North Llano River near........... ....... 52-53

K.

Kansas City, Mexico & Orient Railroad, cooperation by.................... 5

King, W. R., work of.......I................. 5

Klnnison, H. B.; work of.................... 5

L.

Little River at Cameron, Tex................ 18-19

near Little River, Tex................... 104

Uano River afCastell, Tex.................. 104

at White-Littlefleldcrossing,Tex........ 104

near Junction, Tex...................... 54-55

near Mason, T«x........................i. 104

Llano River seepage investigation........... 55-56

M.

Marble Falls, Tex., Colorado River at....... 26-28

Mason, Tex., Llano River near.............. 104

McCashin,C. E.,workof.................... 5

Menard, Tex., SanSaba River at............ 47-48

Miscellaneous measurements, record of....... 104

N.

Nechej River near Beaumont, Tex.......... 104

New Braunfels, Tex., Guadalupe River at.,. 61-02 

North. Concho River at San Angelo, Tex..... 36-38

North Llano River near Junction Tex....... 52-^53

Nueces River at Callallen, Tex............... 82-83

n ear Cinonia, Tex....................... 77-78

near Cotulla, Tex........................ 79

nearThreeRivers,Tex.................. 80-81

Nueces River basin, gaging-station records in 77-87

O. 

Ottine, Tex., San Marcos River at........... 69-70

P.

Pain t Rock, Tex., Concha River near........ 40-41

Pecan Buoy at Brownwood, Tex............ 45-46

Pecos River above Barstow, Tex............ 97-98

at Carlsbad, N.Mex..................... 93-95

near Angeles, Tex....................... 95-97

near Comstook, Tex....:.............. 101-102

near Dayton, N. Mex.................... 91-93

1 near Grandfalls,Tex.................... 99-100

Pecos River seepage investigations.......... 103

Peoos Valley lines, cooperation by........... 5

Price current meters, plate showing. ......... 2

R.

Page. 

Rio Grande at San Maroial, N. Mex......... 88-89

below Elephant Butte dam, N. Mex..... 90-91

Rio Grande basin, gaging-station records in. 88-103 

Rnterside canal near Eagle Lake, Tex....... 104

Run-off in inches, definition of.............. 2

S.

San Angelo, Tex., Concho River near........

North Concho River at..................

San Antonio River at Calavetas, Tex........

at San Antonio, Tex:l.....l..;..::.......

San Antonio River basin, gaging station 

records in.......................

San Antonio, Uvalde '& Gulf Railroad, cooperation by.....................

San Bernard River near I>amon oil field, Tea;: 

San Marcial, N. Mex., Rio Grande at....:..''.

San Marcos River at Ottine^ Tex...;.:....:..

at San Marcos, Tex.....................;

San Marcos Utilities Co., cooperation by.....

San Pedro Creek at San Antonio, Tex r.....

San Saba River at Menard, Tex. ...... . .

near San Saba, Tex........'.",.........1.;

38-39 

36-38 

1S-J4

ZMT6

104

*9-7» 

67-69 

5

TS-76 

47-48 

40-50 

51

.Scope of work........% ............. ....j....;. ^ 1-2

Second-foot, definition of. 1...........,^...."'." '"t

per square mile, definition of............ 2

Seguin-Martindale road crossing, Te^x.,

Geronimo Creek at.............. MML'

Stage-discharge relation, definition' of......... 2

Stevens continuous water-stage recorder,

plate showing-..-.--...".-..... J

T. , -

Terms, definitions of......................... 2

Texas & Pacific Railway, cooperation by.... 5

Texas, cooperation by..................".... 5

Three Rivers, Tex., Nueces River near...... 80-«1

Trinity River, West Fork of, at Bridgeport,

Tex............................. 6-7

17. S. Reclamation Service, cooperation by.. 5 

IT. S. Weather Bureau, cooperation by...... 5

W.

Waco, Tex., Brazos River at................ 11-13

cooperation by.......................... 5

Water-stage recorders, plate showing........ 3

Wharton, Tex., Colorado River at........... 33-34

Wbite-Littlefleld crossing, Tex., liano River

at......................,'........ 104

Williams, E. L., work of... ................... S

Work, authorization of......... f ............ 1

division of............................... 5

scope of..................... f ............ 1-2

Z. ' : 

Zero flow, point of, definition of,,........... v 2

O