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USGS Water-Year Summary 2024
11475800 South Fork Eel River at Leggett, CA
LOCATION - Lat 39°52'29", long 123°43'10" referenced to North American Datum of 1927, in NE 1/4 SE 1/4 sec.03, T.23 N., R.17 W., Mendocino County, CA, Hydrologic Unit 18010106, Mt. Diablo Meridian, on right bank, near Standish Hickey State Park, 0.2 mi upstream from Rock Creek, and 0.7 mi northwest of Leggett.
DRAINAGE AREA - 248 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1965 to June 1995, October 1997 to April 1999 (seasonal records only). July 1995 to September 1997, October 2004 to June 2007 (stage only). October 1999 to September 2004, July 2007 to current year.
CHEMICAL ANALYSES: Water year 1977.
WATER TEMPERATURE: Water year 1966 to June 1979.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 684.72 ft above NGVD of 1929 and 687.59 ft above NAVD of 1988. Prior to July 29, 1988, at datum 8.60 ft higher. July 30, 1988, to July 28, 2003, at datum 6.60 ft higher. Datum lowered July 28, 2003 due to channel scour.
REMARKS - No regulation or diversion upstream from station. See schematic diagram of Eel River Basin available from the California Water Science Center.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 22, 1964, reached a stage of 28.13 ft, from floodmarks, present datum, discharge, 78,700 ft³/s, by slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 72,700 ft³/s, Jan. 4, 1966, gage height, 27.4 ft, from floodmarks, present datum, from rating curve extended above 21,000 ft³/s, on basis of slope-area measurement at gage height 28.13 ft; minimum daily, 7.3 ft³/s, Aug. 4-6, 12, 1977, Sept. 14, 2008.
