LOCATION.--Lat 43° 43'21", long 116° 47'34" (NAD27), in SE1/4 SE1/4 sec.34, T.5 N., R.4 W., Canyon County, Notus quad., Hydrologic Unit 17050114, on right bank 1,100 ft upstream from county road bridge, 0.4 mi southeast of Notus, 7 mi northwest of Caldwell, and at mile 14.0.

DRAINAGE AREA.--3,820 mi², approximately.

PERIOD OF RECORD.--April 1920 to Sept. 1973 (discontinued) (irrigation seasons only 1923-24 water years).

REVISED RECORDS.--WSP 1347: 1930.

GAGE.--Water-stage recorder. Datum of gage is 2,288.55 ft above sea level, levels by US Corps of Engineers, Boise River Surveys. Prior to Aug. 26, 1936, nonrecording gage at site 1,100 ft downstream, at same datum.

REMARKS.--Flow regulated by Anderson Ranch Reservoir (sta 13190000) beginning December 1945, Arrowrock Reservoir (sta 13194000) beginning April 1920, and Lucky Peak Lake (sta 13201500) 49.8 mi upstream beginning October 1954. Diversions above station for irrigation of about 347,000 acres, of which about 4,100 acres are by withdrawals from ground water; and undetermined acreage is below station, and about 5,000 acres near Mountain Home; about 50,000 acres near Lake Lowell, and sizable areas near the mouth of Boise River are outside the basin. About 19,000 acres are irrigated above the station with water diverted from Payette River.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 20,500 ft³/s Apr. 20, 1943, gage height, 10.43 ft; minimum observed, 10 ft³/s Aug. 18, 21, 1920, gage height, 0.78 ft.