USGS Water-Year Summary 2022
08126380 Colorado River near Ballinger, TX
LOCATION - Lat 31°42'55", long 100°01'34" referenced to North American Datum of 1927, Runnels County, TX, Hydrologic Unit 12090101, at right downstream end of bridge on Farm Road 2111, 0.4 mi upstream from Rocky Creek, 5.0 mi northwest of Ballinger, and at mile 665.8.
DRAINAGE AREA - 16,358 mi² of which 10,260 mi² probably is noncontributing.
- WSP 1118: Drainage area. WSP 1512: 1916-17, 1919-20, 1921(M), 1922-25, 1928(M), 1930(M). WSP 1712: 1935, 1954- 55(M). WDR TX-78-3: 1975-77.
PERIOD OF RECORD - June 1907 to Sept. 1979 (published as "at Ballinger", station 08126500), Oct. 1979 to current year. Monthly discharge only for some periods published in WSP 1312. Gage-height records collected in this vicinity from 1903-29 are contained in reports of the National Weather Service.
GAGE - Water-stage recorder. Datum of gage is 1,606.51 ft above NGVD of 1929. Prior to Nov. 29, 1930, non-recording gages at several sites and at various datums near site 5.4 mi downstream. Nov. 29, 1930, to May 1, 1975, water-stage recorder at site 6.2 mi downstream and May 1, 1975, to Sept. 30, 1979, water-stage recorder at site 5.4 mi downstream, both at datum 12.77 ft lower. Oct. 1, 1979 to June 20, 2001, water-stage recorder at site 300 ft left at same datum. Satellite telemeter at station.
COOPERATION - Colorado River Municipal Water District, CRMWD and the U.S. Geological Survey, USGS
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1882, about 36 ft sometime in 1884, at former site and datum, from information by local residents. Flood of Aug. 6, 1906, reached a stage of about 32.0 ft, at former site and datum, from floodmarks (backwater from Elm Creek).
EXTREMES FOR PERIOD PRIOR TO REGULATION - WATER YEARS 1908-1952: Maximum discharge, 75,400 ft³/s, Sept. 18, 1936, gage height, 28.6 ft, at former site and datum; no flow at times.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 45 years (water years 1908-52) prior to completion of Lake J.B. Thomas, 387 ft³/s (280,300 acre-ft/yr).
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Oct. 1961 to Sept. 1997 (local observer), Feb. 2001 to current year. (continuous).
WATER TEMPERATURE: Oct. 1961 to Sept. 1997 (local observer), Feb. 2001 to current year. (continuous).
SUSPENDED SEDIMENT DISCHARGE: Jan. 1978 to Sept. 1981 (local observer).
INSTRUMENTATION - A two parameter continuous water-quality instrument since Feb. 2001.