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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2025
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.
SURFACE-WATER RECORDS
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).
REMARKS - Flow regulated by many reservoirs upstream. Gage out of operation during periods November 1993 to January 1994 and July to September 1994. Precipitation records for period October 2009 to September 2012 have been collected at this location.
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.
WATER-QUALITY RECORDS
PERIOD OF RECORD - WATER TEMPERATURE: October 2023 to current year.
INSTRUMENTATION - Temperature sensor and data logger.
EXTREMES FOR PERIOD OF RECORD - WATER TEMPERATURE: Maximum, 24.8°C July 11, 12, 2024; minimum, 3.7°C Jan. 15, 16, 2025.
