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USGS Water-Year Summary 2024
07344488 Monticello Reservoir near Mount Pleasant, TX
LOCATION - Lat 33°04'52.7", long 95°02'21.1" referenced to North American Datum of 1983, Titus County, TX, Hydrologic Unit 11140305, at left end of dam on center support near gate 2. Prior to Apr. 21, 2021 0.50 mi upstream on old intake structure on Blundell Creek, approximately 11.0 mi southwest of Mount Pleasant, and approximately 16.0 mi southeast of Mount Vernon.
DRAINAGE AREA - 36 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 1998 to Sept. 2002 (contents), Oct. 2002 to current year.
GAGE - Water-stage recorder. Datum of gage is 0.00 ft above NGVD of 1929 and 0.10 ft below NAVD of 1988. To obtain elevation values in NAVD 1988, add 0.10 ft. Satellite telemeter at station.
REMARKS - The lake is formed by a rolled earthfill dam 3,200 ft long, including spillways. Construction began in 1971, and deliberate impoundment began in 1973, with lake at normal pool level in 1974. The spillway is an excavated channel cut through natural ground. The spillway is 1,000 ft wide, and located to the left of the left end of the dam. The service spillway is 204.0 ft wide with flow controlled by four 40.0 by 14.0 ft tainter gates. The dam, owned and operated by Texas Utilities Services, Inc., provides cooling water for electrical generation at the Monticello Steam Electric Station. Data regarding the dam are given in the following table:
Elevation (feet) Top of dam............................................................ 352.0 Crest of uncontrolled spillway........................................ 343.5 Crest of gated spillway............................................... 340.0 Lowest gated outlet (invert).......................................... 328.0
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 37,980 acre-ft, Feb. 16, 2001, elevation, 341.58 ft; minimum contents, 31,910 acre-ft, Jan. 5, 2000, and Jan. 22, 2002, elevation, 338.57 ft; maximum elevation, 344.17 ft, Dec. 28, 2015; minimum elevation, 335.34 ft, Oct. 23-24, 2022.
