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USGS Water-Year Summary 2024
14171600 WILLAMETTE RIVER AT CORVALLIS, OR
LOCATION - Lat 44°33'58.9", long 123°15'24.5" referenced to North American Datum of 1983, Benton County, OR, Hydrologic Unit 17090003, on left bank, at Harrison Street Bridge (Oregon Route 34) and at mile 131.4.
DRAINAGE AREA - 4,420 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2009 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 180 ft above NGVD of 1929, from topographic map. Prior to Aug. 10, 2010, at site 375 ft upstream at datum 10 ft higher.
REMARKS - Flow regulated by several reservoirs upstream from station. Many small diversions for irrigation upstream from station.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Dec. 1, 1861, reached a stage of 52.40 ft, present datum, discharge not determined; flood of Dec. 23, 1964, reached a stage of 46.00 ft, present datum, discharge not determined; information supplied by National Weather Service.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 99,000 ft³/s Apr. 10, 2019, gage height, 32.84 ft; minimum discharge, 3,400 ft³/s Nov. 21, 2018.
