months, stage and discharge may be affected by ice in the
channel. Data values reported on these pages may be
significantly higher or lower than the actual streamflow.
Adjustments to the data will be done after detailed analyses.
Ice affected values identified on graphs (•) may be viewed by choosing the table
output format. If you have questions about these values,
please contact the
Idaho Water Data Maintainer.
LOCATION.--Lat 45° 11'01", long 113° 53'43"
(NAD83), in NE1/4 NE1/4 sec.6, T.21 N., R.22 E., Lemhi County, Salmon
quad., Hydrologic Unit 17060203, 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. Mean elevation, 7,380
PERIOD OF RECORD.--April 1912 to September 1916, July 1919 to
current year. Monthly discharge only for some periods, published in
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, nonrecording gage at site 700 ft
upstream at different datum.
REMARKS.--Diversions above station for irrigation of about 83,800
acres, of which about 900 acres are irrigated by withdrawals from
groundwater (1966 determination).
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, 242
ft3/s Jan. 8, 1937, gage height, 1.50 ft.