USGS Water-Year Summary 2024

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.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 2002 to current year.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,593.30 ft above NAVD of 1988. Prior to Aug. 13, 2010, at site 300 ft downstream at same datum.

REMARKS - Flow regulated by Trinity Lake (station 11525400) and transbasin diversion to Judge Francis Carr powerplant (station 11525430). Small diversion for irrigation upstream from station. See schematic diagram of Klamath River and Trinity River Basins available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 13,350 ft³/s, April 27, 2017, gage height 14.10ft; minimum daily, 273 ft³/s, Oct. 19, 2022.

WATER-QUALITY RECORDS

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.