LOCATION.--Lat 44° 14'44", long 116° 58'51"
(NAD83), in NW1/4 SE1/4 sec.31, T.11 N., R.5 W., Washington County,
Weiser South quad., Hydrologic Unit 17050201, on right bank at
upstream side of U.S. Highway 30N/95 spur bridge at Weiser, 0.7 mi
downstream from Weiser River, and at mile 351.3.
DRAINAGE AREA.--69,200 mi², approximately. Mean elevation, 5,400
PERIOD OF RECORD.--October 1910 to current year. Fragmentary
gage-height record obtained by U.S. Weather Bureau since 1895.
Monthly discharge only for October 1910, published in WSP 1317.
GAGE.--Water-stage recorder. Datum of gage is 2,086.64 ft above
NGVD of 1929. Prior to Oct. 1, 1914, nonrecording gage 0.2 mi
downstream at different datum. Oct. 1, 1914 to Oct. 11, 1933,
nonrecording gage, and Oct. 12, 1933 to Apr. 13, 1964, water-stage
recorder, at site 0.3 mi upstream at same datum.
REMARKS.--Flow regulated by many reservoirs above station. Diurnal
fluctuation caused by hydroelectric plants upstream. Diversions above
station for irrigation of about 3,650,000 acres, of which about
742,000 acres are irrigated by withdrawals from ground water. In
addition, approximately 7,300 acres are irrigated below station by
diversions from Weiser River (1966 determination).
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 84,500 ft³/s
Apr. 29, 1952, gage height, 14.67 ft, site and datum then in use;
maximum gage height recorded, 15.55 ft, Dec. 20, 1972, backwater from
ice jam; minimum discharge, 4,390 ft³/s June 7, 1992, gage height,
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Mar. 3, 1910, reached
a stage of 17.1 ft, at site and datum 0.3 mi upstream, from reading
on old U.S. Weather Bureau gage, discharge, 120,000 ft³/s. Flood in
June 1894 was considerably higher.
The following water temperature values
represent values at the point of measurement, which is often located
close to the streambank, and do not necessarily represent the average
temperatures of the channel cross section at this site. All data is
provisional and subject to revision.