LOCATION.--Lat 43° 36'33", long 116° 12'27" (NAD27), in NE1/4 SW1/4 sec.10, T.3 N., R.2 E., Ada County, Boise South quad., Hydrologic Unit 17050114, on right bank at Capitol Boulevard Bridge, at Boise, and at mile 52.8.

DRAINAGE AREA.--2,741 mi², revised.

PERIOD OF RECORD.--March 1938 to September 1939 (gage heights only), February 1940 to October 1982 (discontinued).

GAGE.--Water-stage recorder. Datum of gage is 2,675.46 ft, datum of US Corps of Engineers, Boise River Surveys. Prior to Apr. 30, 1943, at site 1 mi upstream at datum 13.69 ft higher. Apr. 30 to July 10, 1943, at site 400 ft downstream at present datum.

REMARKS.--Flow regulated by Anderson Ranch Reservoir (sta 13190000), Arrowrock Reservoir (sta 13194000) and Lucky Peak Lake (sta 13201500). The New York, Ridenbaugh and four small canals (sta 13204500) divert between station "near Boise" ( sta 13202000) and this station. Diversions above station for irrigation of about 203,000 acres of which about 5,000 acres are outside the basin near Mountain Home, about 130,000 acres are inside the basin below station, and about 50,000 acres are outside the basin near Lake Lowell.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 21,000 ft³/s Apr. 20, 1943, gage height, 10.0 ft, site and datum then in use; minimum discharge, 1.3 ft³/s Feb. 3, 1955, gage height, 2.21 ft; minimum daily, 3.5 ft³/s Jan. 19-23, 1961.