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 44° 56'24", long 113° 38'21"
(NAD83), in NW1/4 NE1/4 sec.32, T.19 N., R.24 E., Lemhi County,
Tendoy quad., Hydrologic Unit 17060204, on right bank 35 ft upstream
from bridge on State Highway 28, 1.4 mi south of Tendoy, l.8 mi
upstream from Agency Creek, 6.2 mi north of Lemhi, and at mile
DRAINAGE AREA.--897 mi2.
PERIOD OF RECORD.--November 1938 to August 1939, April 1955 to
September 1963, water years 1964-67 (annual maximum), August 1967 to
GAGE.--Water-stage recorder and crest-stage gage. Elevation of
gage is 4,960 ft above NGVD of 1929, from topographic map. Prior to
Aug. 25, 1967, at site 1.5 mi upstream at different datum. November
1938 to August 1939, nonrecording gage; Apr. 29, 1955 to Sept. 30,
1963, nonrecording 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
ground water (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