USGS Water-Year Summary 2021
14207770 WILLAMETTE RIVER BELOW FALLS, AT OREGON CITY, OR
LOCATION - Lat 45°21'28", long 122°36'35" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.31, T.2 S., R.2 E., Clackamas County, OR, Hydrologic Unit 17090007, on right bank, 0.5 mi downstream from Willamette Falls, 1.4 mi upstream from Clackamas River and at mile 26.2.
DRAINAGE AREA - 10,000 mi². approximately.
PERIOD OF RECORD - November 1976 to current year (gage heights only).
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (Oregon Department of Transportation bench mark).
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum gage height, 48.10 ft Dec. 25, 1964, from National Weather Service database.
EXTREMES FOR PERIOD OF RECORD - Maximum gage height, 46.04 ft Feb. 9, 1996, from high-water mark; minimum gage height, 1.24 ft July 14, 2001.