USGS Water-Year Summary for Site 08177500

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	Available Parameters
	00060 Discharge(Max.,Min.,Mean)
	00065 Gage height(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

08177500 Coleto Creek near Victoria, TX

LOCATION - Lat 28°43'51", long 97°08'18" referenced to North American Datum of 1927, Victoria County, TX, Hydrologic Unit 12100204, on left bank at downstream side of westbound bridge on U.S. Highway 59, 1.6 mi downstream from Coleto Creek dam, 9.0 mi southwest of Victoria, and 11.2 mi upstream from mouth.

DRAINAGE AREA - 500 mi².

REVISIONS HISTORY - WSP 1562: 1939-40. WSP 1732: 1941. WDR US-2006: 2005 (M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - June 1939 to Sept. 1954, June 1978 to current year.

GAGE - Water-stage recorder. Datum of gage is 44.18 ft above NGVD of 1929. Prior to Jan. 17, 1955, at datum 5.0 ft higher. Satellite telemeter at station.

REMARKS -

Since 1981 Water Year, at least 10% of contributing drainage area has been regulated. Beginning on March 6, 1980, water was diverted from the Guadalupe River basin to the Coleto Creek basin upstream from Coleto Creek Reservoir for industrial use. There are no other large diversions above station. No flow at times.

Some records listed in the "Period of Record" for surface water may not be available electronically.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge since at least 1875, 236,000 ft³/s Sept. 22, 1967 (gage height, 42.0 ft, from floodmark), present site and datum, on basis of slope-area measurement of peak flow. Flood of Apr. 20, 1976, reached a stage of 37.85 ft, at site 0.2 mi upstream at present datum. Flood of July 1, 1936, reached a stage of 32.2 ft, present site and datum, from information by railroad company.

EXTREMES FOR PERIOD PRIOR TO REGULATION - WATER YEARS 1939-54, 1979-1980: Maximum discharge, 89,000 ft³/s Oct. 16, 1946 (gage height, 36.64 ft, present datum, from floodmark), on basis of slope-area measurement of peak flow; no flow at times.

AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 16 years (water years 1940-54, 1979-80), 92.7 ft³/s (67,160 acre-ft/yr).