USGS Water-Year Summary 2021
08179500 Medina Lake near San Antonio, TX
LOCATION - Lat 29°32'24", long 98°56'01" referenced to North American Datum of 1927, Medina County, TX, Hydrologic Unit 12100302, at gate-operating platform, 576 ft from the left end of Medina Dam on Medina River, 4.2 mi upstream from Medina diversion dam, 13 mi north of Castroville, 28 mi west of San Antonio, and 70.4 mi from mouth.
DRAINAGE AREA - 634 mi².
- WSP 1923: 1953(M), Drainage area.
PERIOD OF RECORD - May 1913 to Sept. 1994, Aug. 1997 to current year. Prior to Oct. 1965, end of month contents only from records provided by Bexar-Medina-Atascosa Counties Water Control and Improvement District No. 1.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Oct. 1969 to Sept. 1984.
GAGE - Water-stage recorder. Datum of the gage is NGVD of 1929. Prior to Oct. 1999, datum of gage was 7.81 ft higher. Satellite telemetry at station.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 322,700 acre-ft July 5, 2002, elevation, 1074.65 ft; minimum contents, 780 acre-ft, Apr. 11, 1948, elevation, 936.2 ft (present datum).