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LOCATION.--Lat 43° 44'07", long 111° 52'41", in NE1/4 SW1/4 sec.28,
T.5 N., R.39 E., Jefferson County, Hydrologic Unit 17040201, on left bank
0.5 mi downstream from bridge on U.S. Highway 191, 0.5 mi north of Lorenzo,
5.5 mi upstream from Henrys Fork, and at mile 837.9.
DRAINAGE AREA.--5,810 mi2.
PERIOD OF RECORD.--January 1978 to current year. Prior to January 1978 monthly
mean discharges for the period April to September for the years 1924 to 1927
published in WSP 1317.
REVISED RECORDS.--WDR ID-81-1: 1980.
GAGE.--Elevation of gage is 4,850 ft above NGVD of 1929, from topographic map.
Prior to January 1978 at site 0.5 mi upstream at different datum.
REMARKS.--Flow partly regulated by Jackson Lake and Palisades Reservoir.
Some diurnal fluctuations during winter from powerplant operations at Palisades.
Diversion above station for irrigation in Wyoming and Idaho of about 111,600 acres
(1966 determination).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 43,000 ft3/s May 19, 1927,
result of landslide washout on Gros Ventre River, gage height, 9.85 ft, site
and datum then in use; maximum discharge excluding 1927, 38,300 ft3/s June 22, 1997,
gage height, 13.79 ft; minimum, 48 ft3/s Nov. 15, 1979, gage height, 2.48 ft.
Station operated in cooperation with U.S. Bureau of Reclamation.
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