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USGS Water-Year Summary 2024
14186600 FOSTER LAKE AT FOSTER, OR
LOCATION - Lat 44°24'53.11", long 122°40'12.81" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 sec.27, T.13 S., R.1 E., Linn County, OR, Hydrologic Unit 17090006, in Foster Dam on South Santiam River, 0.3 mi upstream from Wiley Creek, 0.5 mi north of Foster, and at mile 37.7.
DRAINAGE AREA - 492 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1966 to September 2003, August 2013 to current year. Prior to October 1971, published as Foster Reservoir at Foster.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by U.S. Army Corps of Engineers).
COOPERATION - Capacity table furnished by U.S. Army Corps of Engineers.
REMARKS - Lake is formed by rockfill embankment with an impervious core and ogee spillway completed in 1966 by U.S. Army Corps of Engineers; controlled storage began in November 1966. Total capacity, 60,780 acre-ft and active capacity 33,210 acre-ft between elevations 609.0 ft, proposed lower limit of operation, and 641.0 ft, top of spillway gates. Lake's primary purposes are reregulation of water released from Green Peter Lake, flood risk management, hydropower, water quality improvement, irrigation, fish and wildlife habitat, recreation, and improved navigation. Month-end contents and change in contents discontinued water year 2014.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 60,350 acre-ft Apr. 28, 1990, elevation, 640.66 ft; minimum contents, 26,590 acre-ft Nov. 15, 16, 1971, elevation, 607.85 ft.
