USGS Water-Year Summary for Site 08060500

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	Available Parameters
	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

08060500 Lavon Lake near Lavon, TX

LOCATION - Lat 33°01'54", long 96°28'56" referenced to North American Datum of 1927, Collin County, TX, Hydrologic Unit 12030106, in right abutment of spillway in dam on East Fork Trinity River, 0.7 mi upstream from St. Louis Southwestern Railway Lines bridge, 0.8 mi upstream from bridge on State Highway 78, 2.9 mi west of Lavon, and 55.9 mi upstream from mouth.

DRAINAGE AREA - 770 mi².

REVISIONS HISTORY - WSP 1922: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Oct. 1953 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 "Lavon Reservoir". PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Oct. 1961 to Jan. 1979.

GAGE - Water-stage recorder. Datum of gage is 0.00 ft above NGVD of 1929 and 0.05 ft above NAVD of 1988. To obtain elevations in NAVD of 1988, subtract 0.05 ft. Prior to Jan. 20, 1954, nonrecording gage in the approach channel at same datum. 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 18,860 ft long, including a 568-foot gated spillway with twelve 40.0- by 28.0-foot tainter gates. The original dam was 9,499 ft long, but conservation capacity was increased to present size in Dec. 1975. Deliberate impoundment began Sept. 14, 1953, and the dam was completed in Oct. 1953. Low-flow outlets consist of five 36-inch-diameter controlled sluice gates. Lake was designed for flood control and water conservation. Water for municipal supply can be released down to elevation 453.0 ft. Flow is affected at times by discharge from the flood-detention pools of 149 floodwater-retarding structures with a combined detention capacity of 69,170 acre-ft. These structures control runoff from 242 mi² in the East Fork Trinity River, Pilot Grove, and Sister Grove Creek drainage basins. The dam is owned by the U.S. Army Corps of Engineers. Data regarding the dam are given in the following table:

                                                                                 Elevation (feet)
Top of dam............................................................          514.0
Design flood..........................................................          509.0
Top of tainter gates..................................................          503.5
Crest of spillway (sill of tainter gates).............................          475.5
Lowest gated outlet (invert)..........................................          453.0

Water-quality records available from Jan. 1980 to Aug. 1999 were published separately as:

Site ID                Site name
330203096284901  Lavon Lk Site AC nr Lavon, TX
330205096280001  Lavon Lk Site AL nr Lavon, TX
330654096273201  Lavon Lk Site BC nr Lavon, TX  
330954096261201  Lavon Lk Site CC nr Lavon, TX  
331023096250101  Lavon Lk Site DC nr Lavon, TX  
330448096315601  Lavon Lk Site EC nr Lavon, TX

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 791,000 acre-ft, May 3, 1990, elevation, 504.93 ft; minimum since lake first filled in 1957, 80,150 acre-ft, Apr. 17, 1976, elevation, 465.96 ft.