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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
11527000 Trinity River near Burnt Ranch, CA
LOCATION - Lat 40°47'20", long 123°26'20" referenced to North American Datum of 1927, Trinity County, CA, Hydrologic Unit 18010211, unsurveyed, Humboldt meridian, in Trinity National Forest, on left bank, 500 ft upstream from Cedar Flat Creek, 700 ft upstream from Highway 299 bridge at Cedar Flat, and 2.3 mi southeast of Burnt Ranch.
DRAINAGE AREA - 1,439 mi².
REVISIONS HISTORY - WDR CA-78-2: 1975 (instantaneous maximum discharge). WSP 1929: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1931 to September 1940, October 1956 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 944.05 ft above NGVD of 1929 and 947.85 ft above NAVD of 1988. Oct. 1, 1931, to Jan. 19, 1940, at site 2 mi upstream at different datum.
REMARKS - Flow regulated since November 1960 by Trinity Lake (station 11525400), 64 mi upstream, and by transbasin diversion to Judge Francis Carr Powerplant (station 11525430) since April 1963. Small diversions upstream from station for irrigation. See schematic diagram of Klamath River and Trinity River Basins available from the California Water Science Center.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 22, 1955, reached a stage of 43.2 ft, from floodmarks, discharge, 172,000 ft³/s, on basis of slope-area measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 81,500 ft³/s, Feb. 25, 1958, gage height, 30.50 ft, from rating curve extended above 40,000 ft³/s, on basis of slope-area measurement at gage height 43.2 ft; minimum daily, 93 ft³/s, Sept. 13, 1939.
WATER-QUALITY RECORDS
PERIOD OF RECORD -
DISCRETE WATER-QUALITY DATA:
CHEMICAL ANALYSES: Water years 1959-66.
SEDIMENT DATA: Water years 1968 (partial-record station).
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years 1962-64, 1967, 1969-83.
