USGS Water-Year Summary 2019
14159500 SOUTH FORK MCKENZIE RIVER NEAR RAINBOW, OR
LOCATION - Lat 44°08'10", long 122°14'50" referenced to North American Datum of 1927, in NE 1/4 sec.31, T.16 S., R.5 E., Lane County, OR, Hydrologic Unit 17090004, Willamette National Forest, on right bank, 0.2 mi upstream from Cougar Creek, 0.6 mi downstream from Cougar Dam, 2.1 mi south of Rainbow and at mile 3.9.
DRAINAGE AREA - 208 mi².
REVISIONS HISTORY - WSP 1638: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1947 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,236.42 ft above NGVD of 1929 (Federal Highway Administration bench mark). Oct. 1 to Nov. 4, 1947, nonrecording gage at site 40 ft upstream at datum 0.80 ft higher.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge, 24,500 ft³/s Dec. 28, 1945, gage height, 8.8 ft, from floodmarks, at U.S. Army Corps of Engineers site 40 ft upstream, at datum 0.80 ft higher (computed by U.S. Army Corps of Engineers).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 17,600 ft³/s Dec. 11, 1956, gage height, 8.66 ft, from rating curve extended above 8,100 ft³/s; maximum gage height, 8.90 ft Dec. 22, 1955 (backwater from debris); minimum discharge, 17 ft³/s Nov. 18, 1965; minimum daily, 85 ft³/s Apr. 26-28, 1977.
CLIMATOLOGICAL RECORDS
PERIOD OF RECORD - BAROMETRIC PRESSURE: April 2012 to current year.
INSTRUMENTATION - Meteorological monitor.
EXTREMES FOR PERIOD OF RECORD - BAROMETRIC PRESSURE: Maximum, 746 mmHg Dec. 30, 2014; minimum, 706 mmHg Jan. 20, 2017.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD -
WATER TEMPERATURE: July 1955 to November 1999, December 2000 to current year.
DISSOLVED OXYGEN: December 2000 to September 2006.
TURBIDITY: December 2000 to September 2006, February 2016 to April 2016.
TOTAL DISSOLVED GAS: April 2012 to current year.
INSTRUMENTATION - Water-quality monitor.
EXTREMES FOR PERIOD OF DAILY RECORD -
WATER TEMPERATURE: Maximum, 20.0°C July 28, 1958; minimum, 0.5°C Jan. 20-23, 1962.
DISSOLVED OXYGEN: Maximum, 14.5 mg/L Feb. 23, 2002, result of Cougar Lake tunnel tap; minimum, 7.4 mg/L Sept. 15, 2001.
TURBIDITY: Maximum, 1,410 FNU Feb. 23, 2002, result of Cougar Lake tunnel tap; minimum, <1 FNU on many days each year.
TOTAL DISSOLVED GAS: Maximum, 878 mmHg Dec. 26, 2015; minimum, 710 mmHg Sept. 15, 16, 2015, Jan. 20, 2017.