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USGS Water-Year Summary 2024
08110300 Lake Mexia near Mexia, TX
LOCATION - Lat 31°38'37", long 96°34'43" referenced to North American Datum of 1927, Limestone County, TX, Hydrologic Unit 12070103, 550 ft downstream from Cedar Creek, 610 ft upstream from spillway of dam on Navasota River, 1.0 mi upstream from Echo Dam, 1.6 mi upstream from Jacks Creek, 6.0 mi southwest of Mexia, and 180.0 mi upstream from mouth.
DRAINAGE AREA - 196 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1961 to Sept. 1986, Apr. 1999 to Jan. 2004 (contents). Apr. 2002 to current year.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Jan. 1966 to Oct. 1983.
BIOCHEMICAL DATA: Jan. 1966 to Nov. 1976.
RADIOCHEMICAL DATA: Feb. 1981.
GAGE -
Water-stage recorder. Satellite telemetry at station.
Datum of the Gage: 0 ft NGVD29 via a differential levels circuit in 1961 by USGS personnel from a USGS benchmark stamped: TT 16 FHK 1958.
COOPERATION - Diversions from lake for municipal use were furnished by the Bistone Municipal Water Supply District.
REMARKS - Records good. The lake is formed by an earthfill dam, 1,645 ft long, including a 520-ft uncontrolled concrete ogee-type spillway near the center of dam. The dam was completed and deliberate impoundment of water began June 5, 1961. The dam is owned by the Bistone Municipal Water District. Data regarding the dam and lake are given in the following table:
Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.Elevation (feet) Top of dam............................................................ 462.3 Crest of spillway..................................................... 448.3 Lowest gated outlet (invert).......................................... 442.1
EXTREMES FOR PERIOD OF RECORD - July 1961 to Sept. 1986, Apr. 1999 to Sept. 2002: Maximum contents, 22,460 acre-ft, May 11, 1979; minimum contents, 2,440 acre-ft, Jan. 15, 1964; July 1961 to Sept. 1986, Apr. 1999 to current year: maximum elevation, 455.36 ft, May 11, 1979; minimum elevation, 445.09 ft, Dec. 9 & 10, 2006.
