USGS Water-Year Summary 2020
11468900 Mattole River near Ettersburg, CA
LOCATION - Lat 40°08'22", long 123°59'25" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.06, T.4 S., R.2 E., Humboldt County, CA, Hydrologic Unit 18010107, Humboldt meridian, on left bank, upstream side of Ettersburg Honeydew Road, 0.3 mi east of Ettersburg, 0.4 mi downstream of Bear Creek, and 31.9 mi from Mattole River near Petrolia.
DRAINAGE AREA - 70.9 mi².
- WDR CA-03-2: (peaks above the base).
PERIOD OF RECORD - June 2001 to current year.
GAGE - Water stage recorder and crest-stage gage. Datum of gage is 578.93 ft above NGVD of 1929.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 17,800 ft³/s, Feb. 25, 2019, gage height, 28.11 ft; minimum daily, 2.9 ft³/s, Sept. 20, 2016.
PERIOD OF RECORD
CONTINUOUS WATER-QUALITY DATA:
WATER TEMPERATURE: Water years June 2001 to current year.