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USGS Water-Year Summary 2024
08124000 Colorado River at Robert Lee, TX
LOCATION - Lat 31°53'07", long 100°28'49" referenced to North American Datum of 1927, Coke County, TX, Hydrologic Unit 12080008, on left bank 190 ft upstream from bridge on State Highway 208 in Robert Lee, 0.4 mi upstream from Mountain Creek, 2.7 mi downstream from Messbox Creek, 3.6 mi downstream from Robert Lee Dam, and at mile 712.4.
DRAINAGE AREA - 15,307 mi² of which 10,260 mi² probably is noncontributing.
REVISIONS HISTORY - WSP 1732: 1925(M). WDR TX-81-3: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Oct. 1923 to Dec. 1927, Apr. 1939 to May 1956, Oct. 1968 to current year. Prior to Dec. 1927, published as "near Robert Lee".
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Oct. 1947 to Sept. 1957.
GAGE - Water-stage recorder. Datum of gage is 1,772.21ft above NAVD88. Prior to July 26, 2023, the datum of gage was 1,771.70ft above NGVD of 1929. Prior to Dec. 31, 1927, nonrecording gage at site 9.0 mi downstream at different datum. Apr. 18 to Sept. 26, 1939, nonrecording gage, and Sept. 27, 1939 to May 9, 1956, water-stage recorder at site 200ft downstream at same datum. Satellite telemeter at station.
COOPERATION - Colorado River Municipal Water District, CRMWD and the U.S. Geological Survey, USGS
REMARKS - Since July 1952, at least 10% of contributing drainage area has been regulated. There are many diversions above station for municipal, mining, agricultural, and industrial uses. No flow at times.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1907, 26.7 ft, Oct. 13, 1957, from floodmarks. Flood in Apr. 1922 reached a stage of 25.5 ft, present datum, from information by local resident.
EXTREMES FOR PERIOD PRIOR TO REGULATION -
WATER YEARS, 1924-1927, 1940-1951: Maximum discharge, 32,500 ft³/s, Sept. 6, 1926, gage height, 20.20 ft, site and datum then in use, from rating curve extended above 15,000 ft³/s; no flow at times.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 16 years (water years 1924-27, 1940-51) prior to completion of Lake J.B. Thomas, 234 ft³/s (169,400 acre-ft/yr).
