USGS Water-Year Summary for Site 08144900

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	Available Parameters
	72375 Elevation, lake/res, LMSL(Max.) [LOCAL]
	72375 Elevation, lake/res, LMSL(Min.,Mean) [Local]

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

08144900 Brady Creek Reservoir near Brady, TX

LOCATION - Lat 31°08'17", long 99°23'07" referenced to North American Datum of 1927, McCulloch County, TX, Hydrologic Unit 12090110, at mouth of Bear Creek on Brady Creek, on upstream side and near center of Brady Creek Dam, 10 ft upstream from Farm Road 3022 over Brady Creek Dam, 3.0 mi west of Brady, and 34.1 mi upstream from mouth.

DRAINAGE AREA - 523 mi².

REVISIONS HISTORY - WDR TX-81-3: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - May 1963 to Sept. 1983, Jan. 1999 to Sept. 2002 (contents), Oct. 2002 to current year. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Sept. 1964 to Apr. 1983. BIOCHEMICAL DATA: Sept. 1964 to Apr. 1983. RADIOCHEMICAL DATA: Feb. 1981.

GAGE - Water-stage recorder. Datum of gage determined from Texas Highway Department benchmark. On January 19, 2024, a GNSS survey done by the USGS determined that to convert published values to NAVD88, subtract 0.04ft, to convert published values to NGVD29, subtract 0.27ft. Prior to May 5, 2004, water-stage recorder at site 250 ft upstream at same datum. Satellite telemeter at station.

COOPERATION - Records of diversions may be obtained from the city of Brady.

REMARKS - The reservoir is formed by a compacted earthfill dam 8,400 ft long. The dam was completed and storage began in May 1963. The dam was built by the city of Brady in cooperation with the Natural Resources Conservation Service and the Farmers Home Administration for flood control, municipal, and industrial water supply. The spillway is a cut channel through natural ground 1,000 ft wide located at right end of dam. The service spillway is an uncontrolled concrete drop-inlet structure that discharges through a 7.0- by 7.0-foot concrete box conduit and is designed to discharge 4,000 ft³/s at a 19.4-ft head. The gated outlet is a 36-inch pipe that extends through the embankment and is equipped with three sluice gates for controlled releases downstream. Flow into reservoir is affected at times by discharge from the flood-detention pools of 35 floodwater-retarding structures with a combined detention capacity of 77,950 acre-ft. These structures were built during the period Feb. 1955 to July 1962 and control runoff from 263 mi² in the Brady Creek watershed above this station. Data regarding the dam are given in the following table:

                                                                              Elevation (feet)
Top of dam............................................................         1,783.0
Crest of emergency spillway...........................................         1,762.4
Crest of service spillway.............................................         1,743.0
Lowest gated outlet (invert)..........................................         1,712.0

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 40,880 acre-ft, Sept. 24, 1971, elevation, 1,747.70 ft; minimum contents, 1,030 acre-ft, Sept. 18, 1964, elevation, 1,710.40 ft.