USGS Water-Year Summary for Site 08123850

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	Available Parameters
	00010 Temperature, water(Max.,Min.,Mean)
	00060 Discharge(Mean,Max.,Min.)
	00065 Gage height(Mean)
	00095 Specific cond at 25C(Max.,Min.,Mean)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

08123850 Colorado River above Silver, TX

LOCATION - Lat 32°03'13", long 100°45'42" referenced to North American Datum of 1927, Coke County, TX, Hydrologic Unit 12080008, on right bank 25 ft downstream from Pan American Oil Co. bridge, 4.9 mi west of Silver, and at mile 756.0.

DRAINAGE AREA - 14,910 mi² of which 10,260 mi² probably is noncontributing.

REVISIONS HISTORY - WDR TX-81-3: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Aug. 1967 to current year.

GAGE - Water-stage recorder. Datum of gage is 1,903.43ft above NAVD88 as determined by GNSS survey. Prior to October 11, 2023, the datum of gage was 1,907.66ft above NGVD of 1929. Prior to Oct. 4, 1972, water-stage recorder at site 0.5 mi downstream at same datum. Satellite telemeter at station.

COOPERATION - Colorado River Municipal Water District, CRMWD, & the U.S. Geological Survey, USGS.

REMARKS - Some records listed in the period of record may not be available electronically. Since installation of gage in Aug. 1967, at least 10% of contributing drainage area has been regulated. The Colorado River Municipal Water District diverts low flow into an off channel reservoir 3.0 mi above Colorado River at Colorado City (station 08121000) for brine disposal. There are numerous diversions from Lake J.B. Thomas (station 08118000) for municipal use and for oil field operations. No flow at times.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge: 18,900ft³/s, Sept. 9, 1980 (gage height 22.73ft).

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Oct. 1973 to June 1981 (daily, local observer), June 1981 to current year (continuous). WATER TEMPERATURE: Oct. 1980 to Jan. 1981 (daily, local observer), June 1981 to current year (continuous).

INSTRUMENTATION - Stand-alone specific conductance instrument from Oct. 1973 to June 1981. Stand-alone temperature instrument from Oct. 1980 to Jan. 1981. Continuous two parameter (specific conductance and temperature) water-quality instrument since June 1981.

REMARKS - Specific conductance record is rated good. Temperature record is rated excellent. Interruptions or periods of missing record may be due to instrument failure, no flow conditions or data corrections exceeding allowable criteria, which were deleted. Other than no flow conditions, minimum and maximum extremes may have occurred during period of missing record. Some records listed in the period of record may not be available electronically.

EXTREMES FOR PERIOD OF RECORD - SPECIFIC CONDUCTANCE: Maximum, 19,900 microsiemens/cm, Sept. 10, 1988; minimum, 154 microsiemens/cm, Sept. 21, 1990. WATER TEMPERATURE: Maximum, 36.2°C, June 27, 2008; minimum, 0.0°C, on many days during the winter months of 1983 - 1985, 1987, 1989 - 1991.