USGS Water-Year Summary 2019
13290450 SNAKE RIVER AT HELLS CANYON DAM, IDAHO-OREGON STATE LINE
LOCATION - Lat 45°15'05", long 116°41'50" referenced to North American Datum of 1927, in SE 1/4 SE 1/4 sec.33, T.3 S., R.49 E., Wallowa County, OR, Hydrologic Unit 17060101, Oregon, Wallowa-Whitman National Forest, Squirrel Prairie quad., on left bank 0.2 mi upstream from Hells Canyon Creek, 0.4 mi downstream from Deep Creek, 0.6 mi downstream from Hells Canyon Dam, 15.5 mi northeast of Homestead, Oregon, and at mile 247.0.
DRAINAGE AREA - 73,300 mi².
- WDR ID-78-2: 1969-70, 1972-76, WDR ID-79-2: 1972-73(m).
PERIOD OF RECORD - July 1965 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,400.00 ft above NGVD of 1929 (levels by Idaho Power Company).
COOPERATION - Discharge records furnished by Idaho Power and reviewed by U.S. Geological Survey beginning October 2001.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 103,000 ft³/s Jan. 2, 1997, gage height, 86.17 ft; minimum, 1,580 ft³/s Mar. 19, 1967, gage height, 59.9 ft; minimum daily, 4,360 ft³/s May 8, 1977.