USGS Water-Year Summary for Site 08046500

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	Available Parameters
	62614 Elevation, lake/res, NGVD29(Max.,Min.,Mean)
	62614 Elevation, lake/res, NGVD29(Max.,Min.,Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

08046500 Benbrook Lake near Benbrook, TX

LOCATION - Lat 32°39'02", long 97°26'54" referenced to North American Datum of 1927, Tarrant County, TX, Hydrologic Unit 12030102, in intake structure of Benbrook Dam on Clear Fork Trinity River, 2.5 mi south of Benbrook, 3.5 mi upstream from Marys Creek and 14.6 mi upstream from mouth.

DRAINAGE AREA - 429 mi².

REVISIONS HISTORY - WSP 1922: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Oct. 1952 to Sept. 2000, (U.S. Army Corps of Engineers furnished contents), Oct. 2000 to Sept. 2002 (contents), Oct. 2002 to current year. Prior to Oct. 1970, published as "Benbrook Reservoir". PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Feb. 1964 to July 1979. BIOCHEMICAL DATA: Feb. 1964 to June 1973.

GAGE - Water-stage recorder. Datum of gage is 0 ft above NGVD of 1929 and 0.39 ft below NAVD of 1988. To obtain elevations in NAVD 1988, add 0.39 ft. Satellite telemeter at station.

REMARKS - Some records listed in the "Period of Record" for surface water and water quality may not be available electronically. The lake is formed by a rolled earthfill dam 9,130 ft long, including a 500-ft uncontrolled off-channel concrete-gravity spillway with a 100-ft notch in center of ogee weir section. The outlet works consist of a 13.0-ft diameter concrete conduit controlled by two 6.5 by 13.0-ft broome-type gates and two 30-in steel pipes controlled by slide gates. Deliberate impoundment began Sept. 29, 1952. From Aug. 1950 to Sept. 28, 1952, the lake was operated as a detention basin only. The lake was built for flood control, navigation and low-flow regulation. Data regarding the dam are given in the following table:

                                                                                  Elevation (feet)
Top of dam............................................................          747.0
Crest of spillway.....................................................          724.0
Crest of notch in spillway............................................          710.0
Top of conservation storage...........................................          694.0
Crest of intake to wet wells (inverts)................................          656.0
Lowest gated outlet (invert)..........................................          622.0

Water-quality records available from Feb. 1980 to Oct. 2006 were published separately as:

Site ID   Site name
323858097265601  Benbrook Lk Site AC nr Benbrook, Tx
323908097273401  Benbrook Lk Site AL nr Benbrook, Tx
323735097274701  Benbrook Lk Site BC nr Benbrook, Tx
323629097280901  Benbrook Lk Site CL nr Benbrook, Tx
323628097275101  Benbrook Lk Site CR nr Benbrook, Tx
323652097291901  Benbrook Lk Site DC nr Benbrook, Tx

EXTREMES FOR PERIOD OF RECORD - Maximum daily contents, 212,200 acre-ft, May 3, 1990, elevation, 717.54 ft; minimum contents since lake first filled in 1957, 57,990 acre-ft, Sept. 30, 1999, elevation, 685.03 ft; minimum elevation, 676.13 ft, Oct. 8, 2011.