USGS Water-Year Summary 2019
14186100 GREEN PETER LAKE NEAR FOSTER, OR
LOCATION - Lat 44°27'00.00", long 122°32'56.40" referenced to North American Datum of 1983, in NE 1/4 SE 1/4 sec.10, T.13 S., R.2 E., Linn County, OR, Hydrologic Unit 17090006, in Green Peter Dam on Middle Santiam River, 7.0 mi northeast of Foster, and at mile 5.4.
DRAINAGE AREA - 273 mi².
PERIOD OF RECORD - October 1966 to September 2003, October 2013 to current year. Prior to October 1971, published as Green Peter Reservoir near 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.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 426,700 acre-ft Apr. 29, 1990, elevation, 1, 014.61 ft; minimum contents, 116,400 acre-ft Oct. 30, 2015, elevation, 898.87 ft.