USGS Water-Year Summary for Site 08017400

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	Available Parameters
	00054 Reservoir storage(Max.,Min.,Mean)
	62614 Elevation, lake/res, NGVD29(Max.,Min.,Mean)

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

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USGS Water-Year Summary 2024

08017400 Lake Tawakoni near Wills Point, TX

LOCATION - Lat 32°48'31", long 95°55'10" referenced to North American Datum of 1927, Rains County, TX, Hydrologic Unit 12010001, in stairwell at left end of spillway of Iron Bridge Dam on Sabine River, 750 ft upstream from bridge on Farm Road 47, 3.8 mi upstream from McBee Creek, 9.0 mi northeast of Wills Point, and at mile 514.5.

DRAINAGE AREA - 756 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Oct. 1960 to current year. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Dec. 1961 to Apr. 1984. BIOCHEMICAL DATA: Dec. 1961 to June 1973. RADIOCHEMICAL DATA: May 1981.

GAGE - Water-stage recorder. Datum of gage is 0 ft above NGVD of 1929 and 0.06 ft below NAVD of 1988. To obtain elevations in NAVD 1988, add 0.06 ft. Satellite telemeter at station.

COOPERATION - Capacity Table No. 1, based on a 1984 survey was prepared by Forrest and Cotton, Inc., Consulting Engineers, for Sabine River Authority. Table No. 1 was replaced with Table No. 2, provided by the Texas Water Development Board from a survey conducted in Apr. 1997, and put into use Oct. 1, 2000. Capacity Table No. 3, a 0.61 ft. extension of Capacity Table No. 2 was put into use Feb. 16, 2017. Capacity Table No. 4, based on a survey by the Texas Water Development Board, was put into use Jan. 1, 2021.

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 29,500 ft long, including a 480-foot uncontrolled concrete ogee spillway. Outlet works consist of two 4- by 6-foot sluice gates and two 20-inch steel pipes controlled by service valves. Closure of earthen dam began July 1, 1960, and deliberate impoundment of water began Oct. 7, 1960. Diversions are made for municipal use by the City of Dallas and various other users in the Sabine River basin. The dam is owned by the Sabine River Authority. The lake was built for water conservation. Conservation pool storage is 888,130 acre-ft. Data regarding the dam are given in the following table:

                                                                                Elevation (feet)
Top of dam............................................................          454.0
Design flood..........................................................          446.2
Crest of spillway.....................................................          437.5
Lowest intake to wet well (invert)....................................          416.5
Lowest gated outlet (invert)..........................................          378.0

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 1,130,400 acre-ft, May 1, 1966, elevation, 442.58 ft; minimum contents since lake first filled in May 1965, 489,500 acre-ft, Dec. 28,29, 2006, elevation, 424.88 ft.