USGS Water-Year Summary for Site 08183500

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

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Water year 2024: 2024-10-01 to 2025-09-30

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USGS Water-Year Summary 2024

08183500 San Antonio River near Falls City, TX

LOCATION - Lat 28°57'05", long 98°03'50" referenced to North American Datum of 1927, Karnes County, TX, Hydrologic Unit 12100303, at left downstream end of bridge on Farm Road 791, 0.9 mi upstream from Scared Dog Creek, 3.6 mi southwest of Falls City, and at mile 150.5.

DRAINAGE AREA - 2,113 mi².

REVISIONS HISTORY - WSP 1732: 1947(M). WSP 1923: Drainage area. WDR TX-87-3: 1983-84. WDR TX-02-5: 1999(M).

SURFACE-WATER RECORDS

PERIOD OF RECORD - Apr. 1925 to current year. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: May 1965 to Oct. 1966, Apr. 1970 to Sept. 1981, Dec. 1986 to Sept. 1994. BIOCHEMICAL DATA: May 1965 to Oct. 1966, Jan. 1968 to Sept. 1969, Feb. 1974 to Feb. 1981, Oct. 1990 to Sept. 1994. SEDIMENT DATA: Feb. 1966 to Sept. 1975. PERIOD OF DAILY RECORD, Water-Quality.-- SPECIFIC CONDUCTANCE: Jan. 1987 to Sept. 1996. pH: Jan. 1987 to Sept. 1996. WATER TEMPERATURE: Jan. 1987 to Sept. 1996. DISSOLVED OXYGEN: Jan. 1987 to Sept. 1996.

GAGE - Water-stage recorder. Datum of gage is 285.49 ft above NGVD of 1929. Satellite telemeter at station.

REMARKS - Since installation of gage in Apr. 1925, at least 10% of contributing drainage area has been regulated. Flow is also regulated by eleven Natural Resources Conservation Service floodwater-retarding structures. Floodwater-retarding structures were completed in 1972. Some diversions for municipal uses and irrigation above station (amount unknown). Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood in Oct. 1913 reached a stage of 28.4 ft, from floodmark, from information by local residents. Maximum stage since at least 1875 reached 33.8 ft on Sept. 29, 1946.

WATER-QUALITY RECORDS

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Jan. 1987 to Sept. 1996. WATER TEMPERATURE: Jan. 1987 to Sept. 1996. pH: Jan. 1987 to Sept. 1996. DISSOLVED OXYGEN: Jan. 1987 to Sept. 1996.