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LOCATION.--Lat 43° 36'03", long 112° 03'43", in NW1/4 SW1/4 SW1/4
sec.12, T.3 N., R.37 E., Bonneville County, Hydrologic Unit 17040201, on
right bank 3.2 mi north of Idaho Falls municipal powerplant and 8 mi north
of Idaho Falls.
PERIOD OF RECORD.--September 1987 to current year, (prior to October 1988,
discharge measurements and gage height record only).
GAGE.--Elevation of gage is 4,750 ft above NGVD of 1929, from topographic map.
REMARKS.--Flow is spillback from the Great Western Canal, which spills back
into the Snake River below gaging station 13057155 Snake River at Eagle Rock,
but above the measuring cableway for that site. Daily discharges from the
Spillback are not included in the flows for 13057155.
EXTREMES FOR PERIOD OF RECORD.--Maximum daily discharge, 761 ft3/s May 19, 1991;
no flow for many days each year.
Station operated in cooperation with Water District No.1.
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