USGS Water-Year Summary 2019
11516530 Klamath River below Iron Gate Dam, CA
LOCATION - Lat 41°55'41", long 122°26'35" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 sec.17, T.47 N., R.5 W., Siskiyou County, CA, Hydrologic Unit 18010206, Mt. Diablo Meridian, on left bank, 0.1 mi downstream from Bogus Creek, 0.5 mi downstream from Iron Gate Dam, and 6 mi northeast of Hornbrook.
DRAINAGE AREA - 4,630 mi². approximately (not including Lost River, Butte Creek, or Lower Klamath Lake Basins).
PERIOD OF RECORD - October 1960 to current year.
PRECIPITATION: Water years 1999-2001
CHEMICAL DATA: Water years 1962-81, 2002-04 (seasonal records only).
DISSOLVED OXYGEN: Water years 1999-2001, 2002-03 (seasonal records only).
pH: Water years 1999-2001, 2002-03 (seasonal records only).
SPECIFIC CONDUCTANCE: Water years 1999-2001, 2002-03 (seasonal records only).
AIR TEMPERATURE: Water years 1999-2001.
WATER TEMPERATURE: Water years 1962-80, 1999-2001, 2002-03 (seasonal records only).
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 2,162.44 ft above NGVD of 1929 (levels by PacifiCorp, formerly Pacific Power and Light Co.).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 29,400 ft³/s, Dec. 22, 1964, gage height, 13.63 ft, from rating curve extended above 15,000 ft³/s on basis of slope-area measurement of peak flow; minimum daily, 389 ft³/s, Aug. 25-28, 1992.