USGS Water-Year Summary 2023

08063010 Cedar Creek Reservoir near Trinidad, TX

LOCATION - Lat 32°14'35", long 96°08'26" referenced to North American Datum of 1927, Henderson County, TX, Hydrologic Unit 12030107, inside pumphouse on lower level, 1,000 ft north of spillway, 5.5 mi upstream from Joe B. Hogsett Dam on Cedar Creek, and 8.0 mi northwest of Trinidad.

DRAINAGE AREA - 1,007 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Jan. 1965 to current year. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: Dec. 1969 to Sept. 1977. BIOCHEMICAL DATA: Dec. 1969 to Sept. 1977.

GAGE - Water-stage recorder. Datum of gage is 0.00 ft above NGVD of 1929 and 0.16 ft below NAVD of 1988. To obtain elevations in NAVD of 1988, add 0.16 ft. Prior to May 15, 1972, at unfinished pumphouse at same site and datum. May 16, 1972 to Sept. 8, 1975, at site 0.25 mi north and upstream from pumphouse at same datum. Satellite telemeter at station.

COOPERATION - Records of diversions are maintained by the Tarrant Regional Water District. Capacity Table 1-C was provided by Freese and Nichols, consulting engineers for the Tarrant Regional Water District. A new capacity table, Table 2-C, provided by the Texas Water Development Board was put in effect Oct. 1, 1995. Capacity Table 3, based on a volumetric survey performed by the Texas Water Development Board, was put into effect on Oct. 1, 2013. Capacity Table 4, based on a volumetric survey performed by the Texas Water Development Board, was put into effect on Mar. 1, 2021.

REMARKS - Some records listed in the "Period of Record" for surface water and water quality may not be available electronically. The reservoir is formed by a rolled earthfill dam 17,539 ft long. The spillway is located on the right bank 5.5 mi upstream from the dam and discharges into the Trinity River through a cut channel 2.0 mi long. Deliberate impoundment began July 2, 1965, and the dam was completed in Feb. 1966. The spillway is 474 ft long and has eight 40 by 24 ft radial gates and two automatically operated 40 by 8.5 ft hinged gates. Low-flow releases may be made downstream through a 5.0 foot diameter conduit through the dam. The dam is the property of Tarrant Regional Water District and was built for municipal and industrial supply and for recreational purposes. Water is diverted from the reservoir for municipal and industrial uses by lakeside developments and by the cities of Arlington, Fort Worth, Mansfield, Kemp, Trinidad, and Mabank. Conservation pool storage is 637,050 acre-ft. Data regarding the dam are given in the following table:

                                                                              Elevation (feet)
Top of dam............................................................          340.0
Top of radial gates...................................................          325.0
Top of automatic gates................................................          322.5
Crest of spillway (automatic gates)...................................          314.0
Crest of spillway (radial gates)......................................          302.0
Lowest gated outlet (invert)..........................................          263.5

Water-quality records available from Jan. 1977 to Aug. 1985, June 1998 and July 2006 were published separately as:

Site ID                Site name
321113096041201  Cedar Ck Res Site AC nr Trinidad, TX
321116096035301  Cedar Ck Res Site AL nr Trinidad, TX
321111096042901  Cedar Ck Res Site AR nr Trinidad, TX
321227096032701  Cedar Ck Res Site BC nr Trinidad, TX
321403096060601  Cedar Ck Res Site CC nr Trinidad, TX
321548096082301  Cedar Ck Res Site DC nr Trinidad, TX
321818096064301  Cedar Ck Res Site EC nr Trinidad, TX
321843096101701  Cedar Ck Res Site FC nr Trinidad, TX
322119096095401  Cedar Ck Res Site GC nr Trinidad, TX
322119096104901  Cedar Ck Res Site GR nr Trinidad, TX

EXTREMES FOR PERIOD OF RECORD - Maximum contents, 722,000 acre-ft, June 4, 1973, elevation, 323.24 ft; minimum contents since first appreciable storage in 1966, 332,900 acre-ft, Mar. 19, 1967, elevation, 309.42 ft. Maximum elevation, 323.30 ft, 680,800 acre-ft, June 10, 2010.