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LOCATION.--Lat 43° 36'45", long 111° 39'36", in SE1/4 SW1/4 sec.5,
T.3 N., R.41 E., Bonneville County, Poplar quad., Hydrologic Unit 17040104,
on left bank 850 ft upstream from Anderson Canal headgate, 2.4 mi upstream
from Heise, 6 mi east of Ririe, 24 mi upstream from Henrys Fork, and
at mile 853.6.
DRAINAGE AREA.--5,752 mi2. Mean elevation, 7,770 ft.
PERIOD OF RECORD.--September 1910 to current year. Monthly discharge only
for some periods, published in WSP 1317. Prior to 1911, published as
"South Fork of Snake River near Heise."
REVISED RECORDS.--WSP 1217: Drainage area. WSP 1347: 1912.
GAGE.--Water-stage recorder. Datum of gage is 5,015.3 ft above NGVD of 1929.
Prior to July 9, 1913, nonrecording gage, and July 9, 1913 to Sept. 29, 1922,
water-stage recorder at datum 2.65 ft higher. Sept. 30, 1922 to Sept. 30, 1933,
water-stage recorder at datum 2.0 ft higher.
REMARKS.--Some diurnal fluctuations occur during winter powerplant operations at
Palisades. Riley Ditch, 1.5 mi upstream, was not in operation during the year.
Diversions from tributaries above station for irrigation in Wyoming and Idaho
of about 104,000 acres (1966 determination).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, about 60,000 ft3/s May 19, 1927,
result of washing out of landslide on Gros Ventre River, gage height, about 16.0 ft,
present datum; minimum, 460 ft3/s Nov. 10, 12, 1956, gage height, -0.18 ft.
Maximum discharge since filling of Palisades Reservoir (Nov. 1956), 43,500 ft3/s
June 13, 1997, gage height, 11.26 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in early June 1894 was estimated as
65,000 ft3/s by U.S. Army Corps of Engineers.
Station operated in cooperation with Water District No.1.
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