USGS Water-Year Summary 2020
11522500 Salmon River at Somes Bar, CA
LOCATION - Lat 41°22'36", long 123°28'33" referenced to North American Datum of 1927, Siskiyou County, CA, Hydrologic Unit 18010210, unsurveyed, Humboldt Meridian, in Klamath National Forest, on left bank at Somes Bar, and 1.0 mi upstream from mouth.
DRAINAGE AREA - 751 mi².
- WSP 1285: 1912, 1914, 1915 (instantaneous maximum discharge), 1946 (instantaneous maximum discharge), 1948 (instantaneous maximum discharge). WDR CA-72-1: 1970-71 (peaks above base).
PERIOD OF RECORD - September 1911 to September 1915, October 1927 to current year. Monthly discharge only for some periods, published in WSP 1315-B.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 482.97 ft above NGVD of 1929. Prior to October 1927, nonrecording gage at different datum. October 1927 to Dec. 22, 1964, water-stage recorder at site 0.5 mi upstream at datum 6.54 ft higher.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 133,000 ft³/s, Dec. 22, 1964 (result of failure of upstream debris dam), gage height, 46.6 ft, present site and datum, from floodmarks, from rating curve extended above 33,000 ft³/s; minimum daily, 60 ft³/s, Sept. 21-24, 2001.
PERIOD OF RECORD
DISCRETE WATER-QUALITY DATA:
CHEMICAL ANALYSES: Water years 1959-64.
SEDIMENT DATA: Water years 1955-56.
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years 1966 to May 1979.