USGS Water-Year Summary for Site 08086215

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	Available Parameters
	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

08086215 Lake Cisco near Cisco, TX

LOCATION - Lat 32°26'16", long 98°59'07" referenced to North American Datum of 1927, Eastland County, TX, Hydrologic Unit 12060105, on right bank 58 ft upstream from Williamson Dam on Sandy Creek, 0.2 mi west of State Highway 6, 1.4 mi north of Cisco Airport, and 4.0 mi north of Cisco.

DRAINAGE AREA - 26.7 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Feb. 1999 to Sept. 2002 (contents), Oct. 2002 to current year.

GAGE - Water-stage recorder. Datum of gage is NGVD of 1929. To get elevation values in NAVD88 add 0.16 ft. to current values. Satellite telemeter at station.

COOPERATION - Texas Water Development Board, TWDB, and the U.S. Geological Survey, USGS.

REMARKS - The lake is formed by a 1,064-ft-long Ambursen-type, slab and buttress, all concrete dam structure. A 270-ft long, uncontrolled, ogee-type spillway with a hollow core is an integral part of the dam. The outlet works consist of two 8.0- by 8.0-ft steel sluice gates that are inoperative and four cast-iron pipes through the upstream slab at different elevations that are permanently open to inflow. Reportedly, a 30-inch line extends from the water intake arrangement to the nearby pumphouse and filtration/treatment plant. A 12-inch low-flow outlet connected to the primary water-supply line will discharge into a concrete sluice box and enters the old abandoned swimming pool below the dam through an underground concrete conduit. The dam, owned by the city of Cisco, was completed Sept. 7, 1923. Water is impounded for municipal use by city of Cisco, records of diversions may be obtained from the City of Cisco, TX. The city of Cisco has a permit to divert 1,000 acre-ft. annually from Battle Creek. The capacity curve is based on 10 ft. contours by the Henry Exall Elrod Company in May 24, 1920. Data regarding the dam are given below in the following table, and with the exception of the top of the dam, which was shot in by USGS personnel, they appear to be old reservoir design datum elevations (non-NGVD29). The USGS is not responsible for potentially erroneous reported elevations that were provided by other entities.

                                                                              Elevation (feet)
Top of dam............................................................         1,531.6
Crest of spillway(reported)...........................................         1,520.0
Lowest gated outlet (invert, reported)...................................      1,444.5

EXTREMES FOR PERIOD OF RECORD - Feb. 1999 to Sept. 2002: Maximum contents, 18,080 acre-ft, June 26, 1999; minimum estimated daily contents, 10,500 acre-ft, July 2, 2002; Feb. 1999 to current year: Maximum elevation, 1,525.84 ft, Jun. 02, 2016; minimum elevation, 1,496.14 ft, July. 14, 2013.