USGS Water-Year Summary 2021
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.
- WDR CA-78-2: 1975 (instantaneous maximum discharge). WSP 1929: Drainage area.
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. Oct. 1, 1931, to Jan. 19, 1940, at site 2 mi upstream at different datum.
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.
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.