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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
13305000 LEMHI RIVER NEAR LEMHI, ID
LOCATION - Lat 44°56'24", long 113°38'21" referenced to North American Datum of 1983, in NE 1/4 NW 1/4 sec.32, T.19 N., R.24 E., Lemhi County, ID, Hydrologic Unit 17060204, Tendoy quad., on right bank 35 ft upstream from bridge on State Highway 28, 1.4 mi south of Tendoy, 1.8 mi upstream from Agency Creek, 6.2 mi north of Lemhi, and at mile 28.8.
DRAINAGE AREA - 897 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - November 1938 to August 1939, April 1955 to September 1963, water years 1964-67 (annual maximum), August 1967 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 4,899.76 feet above NAVD 1988. Prior to Aug. 25, 1967, at site 1.5 mi upstream at different datum. Nov. 1938 to Aug. 1939, non recording gage; Apr. 29, 1955 to Sept. 30, 1963, non recording gage and supplemental crest-stage gage; Oct. 1, 1963 to Aug. 24, 1967, crest-stage gage only.
REMARKS - Diversions above station for irrigation of about 25,500 acres, of which about 200 acres are irrigated by withdrawals from groundwater (1966 determination).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,430 ft³/s June 21, 1984, gage height, 7.19 ft; minimum discharge, 22 ft³/s Sept. 8, 2008, gage height, 1.37 ft.
