USGS Water-Year Summary for Site 08178800

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	Available Parameters
	00045 Precipitation(Sum)
	00060 Discharge(Mean,Max.,Min.)
	00065 Gage height(Mean)

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

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USGS Water-Year Summary 2023

08178800 Salado Creek at Loop 13, San Antonio, TX

LOCATION - Lat 29°21'25", long 98°24'45" referenced to North American Datum of 1927, Bexar County, TX, Hydrologic Unit 12100301, on right bank at upstream side of bridge on Loop 13 at San Antonio, 1.4 mi east of Brooks Air Force Base, and 3.3 mi upstream from Rosillo Creek.

DRAINAGE AREA - 189 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Sept. 1960 to current year. Prior to Oct. 2000, published as "(Lower Station) at San Antonio". PERIOD OF RECORD, WATER-QUALITY.-- CHEMICAL DATA: Nov. 1968 to Apr. 1979, Dec. 1981 to Sept. 1998, Nov. 2000 to Sept. 2008. BIOCHEMICAL DATA: Nov. 1968 to Apr. 1979, Dec. 1981 to Sept. 1998, Nov. 2000 to Sept. 2008. BIOLOGICAL DATA: Dec. 1975 to Apr. 1979, Dec. 1982 to Dec. 1997, July 2005 to July 2006, July 2008. PESTICIDE DATA: Nov. 1968 to Apr. 1979, July 1982 to June 1995, Jan. 1997 to Sept. 1998, Nov. 2000 to Sept. 2008. SEDIMENT CHEMISTRY DATA: Apr. 1993 to Aug. 1995, June 2001 to Sept. 2001, Dec. 2007. SEDIMENT DATA: Nov. 1971 to Sept. 1973, Apr. 1996 to July 1998, Nov. 2000 to Sept. 2001, Oct. 2003 to Sept. 2008. RADIOCHEMICAL DATA: Feb. 1998 to Mar. 1998.

GAGE - Water-stage recorder. Datum of gage is 526.95 ft above NGVD of 1929. Satellite telemeter at station.

REMARKS - Several small diversions above station. Most of low flow comes from artesian wells and springs within the city of San Antonio. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.

EXTREMES OUTSIDE PERIOD OF RECORD - Floods of Sept. 27, 1946, and Aug. 15, 1960, were about equal magnitude. Flood of Aug. 15, 1960, reached a stage of 26.8 ft, from floodmarks.

CLIMATOLOGICAL RECORDS

PERIOD OF RECORD - Nov. 2009 to current year

INSTRUMENTATION - Rainfall measured by an unshielded, 8-in diameter tipping-bucket raingage, mounted 10 feet above land surface on top of the gage shelter, with satellite telemetry. Datum of gage is 526.95 ft above NGVD of 1929.

WATER-QUALITY RECORDS

PERIOD OF RECORD - CHEMICAL DATA: Nov. 1968 to Apr. 1979, Dec. 1981 to Sept. 1998, Nov. 2000 to Sept. 2008. BIOCHEMICAL DATA: Nov. 1968 to Apr. 1979, Dec. 1981 to Sept. 1998, Nov. 2000 to Sept. 2008. BIOLOGICAL DATA: Dec. 1975 to Apr. 1979, Dec. 1982 to Dec. 1997, July 2005 to July 2006, July 2008. PESTICIDE DATA: Nov. 1968 to Apr. 1979, July 1982 to June 1995, Jan. 1997 to Sept. 1998, Nov. 2000 to Sept. 2008. SEDIMENT CHEMISTRY DATA: Apr. 1993 to Aug. 1995, June 2001 to Sept. 2001, Dec. 2007. SEDIMENT DATA: Nov. 1971 to Sept. 1973, Apr. 1996 to July 1998, Nov. 2000 to Sept. 2001, Oct. 2003 to Sept. 2008. RADIOCHEMICAL DATA: Feb. 1998 to Mar. 1998.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Jan. 1987 to July 2000. pH: Jan. 1987 to July 2000. WATER TEMPERATURE: Jan. 1987 to July 2000. DISSOLVED OXYGEN: Jan. 1987 to July 2000.

EXTREMES FOR PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: Maximum, 1,290 microsiemens/cm, Aug. 23, 1994; minimum, 39 microsiemens/cm, Nov. 9, 1990. pH: Maximum, 9.0 standard units, Apr. 26, 27, 1997; minimum, 7.0 standard units, Aug. 24, 1999. WATER TEMPERATURE: Maximum, 31.0°C, July 17-20, 1988, July 30, 1993, July 17, 19, 1996; minimum, 0.0°C, Dec. 24, 1989. DISSOLVED OXYGEN: Maximum, 16.7 mg/L, Jan. 27, 1988, Mar. 11, 1996; minimum, 0.6 mg/L, July 27, 1996.