PROVISIONAL DATA SUBJECT TO REVISION

LOCATION.--Lat 43° 07'50", long 112° 28'36", (NAD83), near E 1/2 corner, 
   sec.28, T.3 S., R.34 E., Bingham County, Hydrologic Unit 17040207, Moreland quad., 
   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 the bypass channel (sta 13068495) 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.--Maximum discharge prior to Blackfoot River Bypass 
   channel diversion, 1,710 ft3/s Feb. 11, 1962, gage height, 7.68 ft. 

   Since 1964, river only: 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. 

Station operated in cooperation with Idaho Department of Water Resources.

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