USGS Water-Year Summary 2020
13302500 SALMON RIVER AT SALMON, ID
LOCATION - Lat 45°11'01", long 113°53'43" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 sec.06, T.21 N., R.22 E., Lemhi County, ID, Hydrologic Unit 17060203, Salmon quad., on left bank, 1,000 ft downstream from island, 0.4 mi upstream from Lemhi River, 0.5 mi downstream from highway bridge at Salmon, and at mile 258.9.
DRAINAGE AREA - 3,737 mi².
PERIOD OF RECORD - April 1912 to September 1916, July 1919 to current year. Monthly discharge only for some periods, published in WSP 1317.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3,911.14 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers). Prior to Oct. 21, 1929, non recording gage at site 700 ft upstream at datum then is use.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 17,700 ft³/s June 17, 1974, gage height, 8.67 ft; maximum gage height, 10.33 ft, Feb. 7, 1985, result of ice jam; minimum discharge, 242 ft³/s Jan. 8, 1937, gage height, 1.50 ft.