USGS Water-Year Summary for Site 08093350

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

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

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USGS Water-Year Summary 2023

08093350 Aquilla Lake above Aquilla, TX

LOCATION - Lat 31°53'59", long 97°12'09" referenced to North American Datum of 1927, Hill County, TX, Hydrologic Unit 12060202, in outlet structure 450 ft upstream from Farm Road 310 which runs on top of Aquilla Dam on Aquilla Creek, and 3.4 miles north-northeast of Aquilla.

DRAINAGE AREA - 255 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Oct. 1983 to Sept. 2000 (U.S. Army Corps of Engineers furnished contents), Oct. 2000 to Sept. 2002 (contents), Oct. 2002 to current year. PERIOD OF RECORD, Water Quality.-- CHEMICAL DATA: Feb. 1984 to July 1992, Feb. 2004 to Aug. 2005. BIOCHEMICAL DATA: Feb. 1984 to July 1992, Feb. 2004 to Aug. 2005. PESTICIDE DATA: July 1999, Feb. 2004 to Aug. 2005. SEDIMENT CHEMISTRY DATA: Apr. 1992.

GAGE - Water-stage recorder. Datum of gage is 0.00 ft above NGVD of 1929 and 0.58 ft below NAVD of 1988. To obtain elevations in NAVD 1988, add 0.58 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 an earthfill dam with a crest length of 11,890 ft and a top width of 38.0 ft. A reinforced concrete inlet structure, near center of dam, houses the flood-control gates and operating equipment. Closure of the dam began Mar. 20, 1982, and the dam was completed in Jan. 1983. The dam was built and is owned by the U.S. Army Corps of Engineers. Deliberate impoundment began Apr. 29, 1983. The lake was built for water supply, flood control, and recreation purposes. Data regarding the dam are given in the following table:

                                                                              Elevation (feet)
Top of dam............................................................          582.5
Spillway crest (uncontrolled).........................................          564.5
Top of flood-control pool.............................................          556.0
Top of conservation pool..............................................          537.5
Lowest gated outlet (invert)..........................................          503.0

Water-quality records available from Feb. 1984 to July 1992 and Feb. 2004 to Aug. 2005 were published separately as:

Site ID                Site name
315358097122601  Aquilla Lk Site AC nr Aquilla, TX
315402097115401  Aquilla Lk Site AL nr Aquilla, TX
315354097125701  Aquilla Lk Site AR nr Aquilla, TX
315601097111501  Aquilla Lk Site BC nr Aquilla, TX
315649097103701  Aquilla Lk Site CC nr Aquilla, TX
315518097123401  Aquilla Lk Site DC nr Aquilla, TX
315748097144901  Aquilla Lk Site EC nr Aquilla, TX

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 119,000 acre-ft, Dec. 23, 1991, elevation, 551.89 ft; minimum contents after initial filling, 35,080 acre-ft, Feb. 22, Mar. 20, 2000, elevation, 533.73 ft; minimum elevation, 528.79 ft, Dec. 28, 2006.

WATER-QUALITY RECORDS

REMARKS - Pesticide samples are composited from discrete samples collected at the surface, middle, and bottom of the reservoir. Phytoplankton data for this station may be obtained from the U.S. Geological Survey Texas Water Science Center upon request.