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USGS Water-Year Summary 2024
14165500 MCKENZIE RIVER NEAR COBURG, OR
LOCATION - Lat 44°06'47.0", long 123°02'49.1" referenced to North American Datum of 1983, Lane County, OR, Hydrologic Unit 17090004, on right bank, at upstream side of Armitage Bridge, 2 mi southeast of Coburg and at mile 7.2.
DRAINAGE AREA - 1,337 mi².
REVISIONS HISTORY - WSP 1638: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1944 to September 1972, November 2010 to September 2011 (gage heights only), October 2011 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 386.08 ft above NAVD of 1988 (levels by U.S. Army Corps of Engineers). Prior to Nov. 24, 1944, nonrecording gage and Nov. 25, 1944 to Sept. 30, 1972, at site 30 ft downstream at different datums.
REMARKS - Flow regulated since 1963 by Smith River Reservoir (active capacity, 9,900 acre-ft) and Cougar Lake (active capacity, 164,800 acre-ft), and since 1968 by Blue River Lake (active capacity, 85,550 acre-ft). Slight diurnal fluctuation caused by logponds and powerplants upstream. Diversions upstream from station.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood stage of 22.2 ft was reached in December 1861, 21.8 ft in February 1890, and 20.1 ft in January 1943 (information from U.S. Army Corps of Engineers), all at different datum.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 88,200 ft³/s Dec. 29, 1945, gage height, 21.36 ft, site and datum then in use, from rating curve extended above 59,000 ft³/s; minimum discharge, 1,080 ft³/s Aug. 19, 1966.
WATER-QUALITY RECORDS
PERIOD OF RECORD - WATER TEMPERATURE: October 1963 to September 1974, April 1983 to September 1984, October 2020 to current year.
INSTRUMENTATION - Temperature probe and data logger.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 22.3°C July 29, 2022; minimum, 1.9°C Jan. 31, 2023.
