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Water-Year Summary for Site 08180010

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Available Parameters
00053 Surface area(Mean)  
00054 Reservoir storage(Mean)  
62614 Elevation, lake/res, NGVD29(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
08180010 Diversion Lake near Riomedina, TX
LOCATION - Lat 29°30'36", long 98°54'04" referenced to North American Datum of 1927, Medina County, TX, Hydrologic Unit 12100302, on right wing wall of dam, 0.90 mi north of county road 2615, 4.2 mi downstream of Medina dam, 6.1 mi north of Rio Medina, and 66.2 mi from mouth.
DRAINAGE AREA - 649 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Feb. 2001 to Sept 2004; Dec. 2016 to present.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929. Satellite telemeter at station.
REMARKS - The lake is formed by a gravity-type dam, 440 ft long, built on a radius of 700 ft. It is an overflow type, open spillway, with the spillway in the center of the crest. The dam was completed and impoundment began around May 1912. On the west end of the dam are headgates and control valves for the intakes to Medina Canal. The dam and lake are owned and operated by Bexar-Medina-Atascosa Counties Water Control and Improvement District No. 1. Water is diverted to Medina Canal by the Water District for downstream irrigation. Capacity table based on volumetric survey by the Texas Water Development Board, July 1995. Conservation pool storage is 2,560 acre-ft. Data regarding the dam are given in the following table: 
                                                                                    Elevation (feet)
      Top of dam.............................................................         921.6
      Crest of spillway .....................................................         919.0
EXTREMES FOR PERIOD OF RECORD - Maximum contents 6,570 acre-ft, July 5, 2002, elevation 933.34 ft; minimum contents, 1,760 acre-ft, June 12, 13, 2001, elevation, 913.56 ft.