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USGS Water-Year Summary 2024
08099100 Leon River near De Leon, TX
LOCATION - Lat 32°10'25", long 98°31'58" referenced to North American Datum of 1927, Comanche County, TX, Hydrologic Unit 12070201, on left bank at downstream end of bridge on State Highway 16, 1.5 mi upstream from Flat Creek, 4.4 mi northeast of De Leon, 6.0 mi downstream from Hog Creek, and 250.1 mi upstream from mouth.
DRAINAGE AREA - 479 mi².
REVISIONS HISTORY - WDR TX-76-2: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Sept. 1960 to Sept. 1986 (daily mean discharge), Oct. 1986 to Sept. 1995 (daily mean discharges greater than 600 ft³/s), Oct. 1995 to Sept. 30, 2007 (peak discharges greater than base discharge 600 ft³/s), Oct. 1, 2007 to current year (daily mean discharge).
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: May 1981 to July 1982, Nov. 1990 to Aug. 1997, Jan. 2005 to Apr. 2006.
BIOCHEMICAL DATA: May 1981 to July 1982, Nov. 1990 to Aug. 1997, Jan. 2005 to Apr. 2006.
RADIOCHEMICAL DATA: May 1981 to June 1981, Jan. 2005 to Apr. 2006.
GAGE - Water-stage recorder. Datum of gage is 1,210.48 ft. above NAVD88 as determined by GNSS survey. Prior to December 12, 2023, the datum of gage was 1,209.93 ft. above NGVD of 1929. Prior to Nov. 22, 1960, non-recording gage at same site and datum. Satellite telemeter at station.
REMARKS - Since installation of gage at least 10% of contributing drainage area has been regulated. There are numerous diversions above station for municipal, steam power plant operation, and other uses. Some records listed in the period of record may not be available electronically.
EXTREMES OUTSIDE PERIOD OF RECORD - A stage of 19.3 ft occurred in May 1908 at a point 2,000 ft downstream from present gage site and is the highest since that time, from information by local resident.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 24,500 ft³/s Apr. 26, 1990 (gage height, 19.00 ft, from floodmarks), from rating curve extended above 17,600 ft³/s; prior to Apr. 26, 1990, maximum discharge, 7,540 ft³/s June 21, 1968, (gage height, 15.50 ft); no flow for many days most years.
