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LOCATION.--Lat 43° 24'48", long 112° 08'03", in SE1/4 SW1/4 sec.17,
T.1 N., R.37 E., Bingham County, Hydrologic Unit 17040201, on right bank
0.3 mi southeast of Woodville, 2.5 mi north of Shelley, and at mile 787.8.
DRAINAGE AREA.--9,790 mi2, approximately, excluding indeterminate nontributary
area on Snake River Plain.
PERIOD OF RECORD.--March 1915 to current year (prior to October 1931,
irrigation seasons only).
REVISED RECORDS.--WSP 1317: 1916.
GAGE.--Datum of gage is 4,599.0 ft above NGVD of 1929.
REMARKS.--Some regulation by Jackson Lake, Palisades Reservoir, Henrys Lake
(sta 13039000), Island Park Reservoir, and Grassy Lake. Initial filling of
forebay pool at Gem Power plant 2 mi upstream, occurred during March and
April of 1988. Diversions above station for irrigation of about 39,000 acres
below and about 637,000 acres above station, of which about 100,000 acres are
irrigated by withdrawals from ground water (1966 determination). Considerable
water leaks above station into Snake River Plain aquifer.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 67,300 ft3/s June 6, 1976,
gage height, 19.12 ft, result of Teton Dam failure.
Maximum discharge excluding 1976, 47,800 ft3/s June 17, 1997, gage height,
16.05 ft; maximum gage height, 16.97 ft, June 17, 1918;
minimum, 288 ft3/s Nov. 5, 1934, gage height, 2.22 ft.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of June 6, 1894, reached an
estimated discharge of 75,000 ft3/s at former station (13059000) at
Eagle Rock (now Idaho Falls), 7 mi upstream from present site.
Station operated in cooperation with Water District No.1.
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