USGS Water-Year Summary for Site 07299840

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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

07299840 Greenbelt Lake near Clarendon, TX

LOCATION - Lat 35°00'02", long 100°53'40" referenced to North American Datum of 1927, Donley County, TX, Hydrologic Unit 11120201, on upstream side near right end of Greenbelt Lake dam on Salt Fork of Red River, 4.3 mi north of Clarendon, TX.

DRAINAGE AREA - 457 mi² of which 191 mi² probably is noncontributing.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Aug. 1967 to Sept. 2002, Oct. 2012 to current year (daily mean contents), Oct. 2002 to Sept. 2012 (daily mean elevation). Prior to Oct. 1973, published as "Greenbelt Reservoir". PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: May 1967 to Oct. 1967, July 1970 to Apr. 1971, Jan. 1973 to Dec. 1982, Jan. 1984 BIOCHEMICAL DATA: May 1967 to Oct. 1967, July 1970 to Apr. 1971, Jan. 1973, July 1975 to Sept. 1975 RADIOCHEMICAL DATA: Feb. 1981

GAGE - Water-stage recorder. Datum of gage is NGVD of 1929. Satellite telemeter at station.

COOPERATION - Capacity table provided by the Texas Water Development Board. The capacity table, dated Oct. 1974, was placed into use beginning Mar. 2015. The vertical datum used to develop the table was NGVD 1929.

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 5,800 ft long. Deliberate impoundment began Dec. 5, 1966, and the dam was completed in Aug. 1967. The dam is the property of Greenbelt Municipal and Industrial Water Authority and was built to impound water for municipal and industrial uses by the cities of Childress, Clarendon, Crowell, Hedley, and Quanah. The spillway is an uncontrolled open cut through natural ground, 1,450 ft wide and located at the left end of dam, designed to discharge 184,000 ft³/s at an elevation of 2,684.0 ft. A morning-glory-type drop inlet with a 26-ft 8.5-inch-diameter opening at crest discharges into a 7- by 7-ft concrete conduit. The outlet works consists of a 36-in pipe that is controlled by two 20-in valves that control the discharge into a stilling basin and to a water treatment plant. Data regarding the dam are given in the following table.

                                              Elevation (feet)
Top of dam........................................    2,686.0
Design flood......................................    2,683.0
Crest of spillway.................................    2,674.0
Crest of morning-glory-type drop inlet............    2,663.7
Lowest gated outlet (invert)......................    2,597.0

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 44,650 acre-ft, June 26-28, 1975, elevation, 2,655.71 ft; minimum contents after initial filling, 7,130 acre-ft, June 16, 2013, elevation, 2,618.22 ft.