USGS Water-Year Summary 2023
11525854 Trinity River at Douglas City, CA
LOCATION - Lat 40°38'43", long 122°57'24" referenced to North American Datum of 1983, in SW 1/4 NW 1/4 sec.12, T.32 N., R.10 W., Trinity County, CA, Hydrologic Unit 18010211, on right bank, 0.30 mi downstream of Reading Creek, 1.3 mi downstream from Weaver Creek, and 0.80 mi southwest of Douglas City.
DRAINAGE AREA - 931 mi².
PERIOD OF RECORD - October 2002 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,597 ft above NGVD of 1929. Prior to Aug. 13, 2010, at site 300 ft downstream at same datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 13,350 ft³/s, April 27, 2017, gage height 14.10ft; minimum daily, 277 ft³/s, Nov. 26, 2002.
PERIOD OF RECORD
DISCRETE WATER-QUALITY DATA:
SEDIMENT DATA: Water years 2004-2006.
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years 2019 to current year.
SPECIFIC CONDUCTANCE: Water years 2004-2006.