USGS Water-Year Summary for Site 08206600

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	Available Parameters
	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

08206600 Frio River at Tilden, TX

LOCATION - Lat 28°28'02", long 98°32'50" referenced to North American Datum of 1927, McMullen County, TX, Hydrologic Unit 12110108, on left bank 80 ft downstream from bridge on State Highway 16 in Tilden, 300 ft downstream from Leoncita Creek, 1.3 mi upstream from Salt Branch, 1.8 mi downstream from Big Slough, and 44.2 mi upstream from mouth.

DRAINAGE AREA - 4,493 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - July 1978 to current year. PERIOD OF RECORD, Water-Quality.-- CHEMICAL DATA: July 1978 to Oct. 1983, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010. BIOCHEMICAL DATA: July 1978 to Oct. 1983, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010. PESTICIDE DATA: Aug. 1978 to Aug. 1983, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010. RADIOCHEMICAL DATA: Jan. 1981 to May 1981, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010.

GAGE - Water-stage recorder. Datum of gage is 216.04 ft above NGVD of 1929. July 14, 1978, to Sept. 13, 1994, at site 80 ft upstream at same datum. Satellite telemeter at station.

REMARKS - No known regulation. Part of the flow of the Frio River and its headwater tributaries enters the Edwards and associated limestones in the Balcones Fault Zone that crosses the basin upstream from U.S. Highway 90. Considerable flow into various permeable formations also occurs downstream from the Balcones Fault Zone. There are many small diversions above station for irrigation. No flow at times. 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 of July 1932 reached a stage of 38.44 ft, from information by local resident.

WATER-QUALITY RECORDS

PERIOD OF RECORD - CHEMICAL DATA: July 1978 to Oct. 1983, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010. (discontinued). BIOCHEMICAL DATA: July 1978 to Oct. 1983, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010. (discontinued). PESTICIDE DATA: Aug. 1978 to Aug. 1983, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010. (discontinued). RADIOCHEMICAL DATA: Jan. 1981 to May 1981, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010. (discontinued).