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Station operated in cooperation with the U.S. Army Corps of Engineers and funded by
U.S. Geological Survey National Streamflow Information Program (NSIP).
14207740 WILLAMETTE RIVER ABOVE FALLS, AT OREGON CITY, OR
LOCATION.--Lat 45° 20'55", long 122° 37'08", in SW 1/4 SW 1/4 sec.31, T.2 S., R.2 E.,
Clackamas County, Hydrologic Unit 17090007, on right bank 0.2 mi above Willamette
Falls, 1.6 mi downstream from Tualatin River, and at mile 26.8.
DRAINAGE AREA.--10,000 mi2, approximately.
PERIOD OF RECORD.--October 1976 to current year (gage heights only).
GAGE.--Water-stage recorder. Datum of gage is NGVD of 1929.
REMARKS.--Flow regulated by many reservoirs upstream. Gage height elevations possibly
affected by Portland General Electric powerplant operations throughout the year and by
Army Corps of Engineers locks operation during summer months.
EXTREMES FOR PERIOD OF RECORD.--Maximum gage height, 69.47 ft Feb. 9, 1996; minimum,
52.51 ft July 12, 1992.
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