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LOCATION.--Lat 43° 56'33", long 116° 11'45", in NE1/4 SE1/4 sec.15, T.7 N., R.2 E.,
Boise County, Hydrologic Unit 17050122, on left bank 0.5, mi downstream from
Porter Creek, 0.6 mi upstream from concrete highway bridge on State Highway 55,
2 mi north of Horseshoe Bend, and at mile 60.8.
DRAINAGE AREA.--2,230 mi2, approximately. Mean elevation, 5,850 ft.
PERIOD OF RECORD.--February 1906 to September 1916, July 1919 to current year.
Monthly discharge only for some periods, published in WSP 1317.
REVISED RECORDS.--WSP 533: Drainage area.
GAGE.--Datum of gage is 2,625.61 ft above NGVD of 1929. Prior to Nov. 23, 1912,
nonrecording gage at site 1.8 mi upstream at different datum. Nov. 23, 1912
to Apr. 16, 1953, water-stage recorder at site 1,000 ft downstream at datum
2.1 ft lower.
REMARKS.--Flow regulated by Deadwood Reservoir beginning November 1930,
Cascade Reservoir, 51.9 mi upstream, beginning November 1947 and other
reservoirs upstream. Diversions above station for irrigation of about
55,100 acres (1966 determination).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 27,000 ft3/s Dec. 23, 1964,
gage height, 16.35 ft; minimum daily, 260 ft3/s Nov. 14, 1979.
Station operated in cooperation with U.S. Bureau of Reclamation
and Idaho Department of Water Resources.
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