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LOCATION.--Lat 43° 07'50", long 112° 28'36", near E1/4 corner, sec.28,
T.3 S., R.34 E., Bingham County, Hydrologic Unit 17040207, Fort Hall
Indian Reservation, on left bank 11 ft upstream from highway bridge,
8 mi southwest of Blackfoot, and at mile 3.4.
DRAINAGE AREA.--1,295 mi2, including that of Sand Creek, flow of which is
diverted to Blackfoot River through the Idaho Canal.
PERIOD OF RECORD.--July 1913 to current year (prior to October 1931, summer
months only). Monthly discharge only for some periods, published in WSP 1317.
REVISED RECORDS.--WSP 1217: Drainage area.
GAGE.--Elevation of gage is 4,420 ft above NGVD of 1929, from river-profile survey.
Prior to May 8, 1926, nonrecording gage, and May 8, 1926 to June 25, 1937,
water-stage recorder at site 0.5 mi upstream at different datum. June 26, 1937
to Aug. 16, 1963, water-stage recorder at site 175 ft downstream at same datum.
REMARKS.--Flow regulated by Blackfoot Reservoir. Diversions above station for
irrigation of about 28,000 acres below and about 32,000 acres above station,
of which about 900 acres are irrigated by withdrawals from ground water (1966
determination). Part of flow is supplied by waste water from Snake River canals.
Diversions to bypass channel 5.5 mi upstream from station began in April 1964.
For records and statistics of combined discharges, see station 13068501.
EXTREMES FOR PERIOD OF RECORD.--River only (since 1964), maximum discharge,
740 ft3/s June 12, 1984, gage height, 5.53 ft; maximum gage height, 6.77 ft,
June 16, 1997, (backwater from the Snake River); no flow at times some years.
Combined flow(1913-2002), maximum discharge, 2,130 ft3/s May 5, 1974;
no flow at times some years.
Station operated in cooperation with Idaho Department of Water Resources.
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