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LOCATION.--Lat 42° 31'41", long 114° 01'04", in SW1/4 NE1/4 sec.29,
T.10 S., R.21 E., Twin Falls County, Hydrologic Unit 17040212, on left bank
200 ft downstream from highway bridge at Milner, 0.4 mi downstream from
Milner Dam, and at mile 638.7.
PERIOD OF RECORD.--November 1992 to current year.
GAGE.--Datum of gage is 4,062.9 ft above NGVD of 1929.
REMARKS.--Flow regulated by American Falls Reservoir, Lake Walcott, Milner Lake,
and other reservoirs having a combined usable capacity of about 4,700,000 acre-ft.
The flow at this site represents discharge to Snake River passing through Milner Dam.
Former station number for this gaging station, 13088000, represents combined flow to
Snake River from this site and from 13087505 Lower Milner Power Plant, which began
operation November 1992. Considerable water leaks into the Snake River Plain aquifer
above station. Diversions above station for irrigation of about 1,990,000 acres, of
which about 504,000 acres are irrigated by withdrawals from ground water, and about
436,000 acres are irrigated below station. Return flow in large part enters Snake
River between Milner and King Hill stations. Prior to 1993 water year, at times,
practically entire flow was diverted during irrigation season.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 26,300 ft3/s June 22, 1997,
gage height, 21.14 ft; minimum daily, 0.34 ft3/s Mar. 6, 2002.
Station operated in cooperation with Water District No.1.
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