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LOCATION.--Lat 43° 07'31", long 112° 31'06", in SE1/4 SE1/4 sec.30,
T.3 S., R.34 E., Bingham County, Hydrologic Unit 17040206, on right bank
0.3 mi downstream from highway bridge, 0.7 mi downstream from Blackfoot River,
10 mi southwest of Blackfoot, and at mile 750.1.
DRAINAGE AREA.--11,310 mi2, approximately, excluding indeterminate
nontributary area on Snake River Plain.
PERIOD OF RECORD.--June 1910 to current year. Monthly discharge only
for some periods, published in WSP 1317. Published as "at Clough ranch,
near Blackfoot", 1924-45.
GAGE.--Datum of gage is 4,399.83 ft above NGVD of 1929. Prior to July 6, 1913,
nonrecording gages; July 6, 1913 to Aug. 19, 1962, water-stage recorder at
site 0.1 mi upstream at datum 1.00 ft higher.
REMARKS.--Flow regulated by Jackson Lake, Palisades Reservoir, Henrys Lake
(see sta 13039000), Grassy Lake, Island Park Reservoir, and Blackfoot Reservoir
(see sta 13065000), having a combined capacity of 2,883,000 acre-ft. Diversions
above station for irrigation of about 121,000 acres below and about 832,000 acres
above station, 155,000 acres of which are irrigated by withdrawals from ground water
(1966 determination). Considerable water leaks above the station into the Snake River
Plain aquifer.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 53,500 ft3/s June 7, 1976,
gage height, 15.44 ft, result of Teton Dam failure; maximum discharge excluding 1976,
46,200 ft3/s June 18, 1918, gage height, 14.80 ft, site and datum then in use;
minimum, 111 ft3/s Nov. 10, 1934, gage height, 0.80 ft, site and datum then in use.
EXTREMES OUTSIDE PERIOD OF RECORD.--Late in summer of 1905 there was no flow in
Snake River for a distance of 10 mi in vicinity of Blackfoot. Aug. 9, 1905,
discharge of Snake River just below mouth of Blackfoot was 39 ft3/s, supplied
by ground-water inflow a short distance upstream.
Station operated in cooperation with Water District No.1.
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