LOCATION.--Lat 44° 16'06", long 114° 43'58" (NAD83), in sec.20, T.1 N., R.15 E. (unsurveyed), Custer County, Sunbeam quad., Hydrologic Unit 17060201, Challis National Forest, on left bank 700 ft downstream from Yankee Fork, 18 mi upstream from Clayton, and at mile 366.9.

DRAINAGE AREA.--807 mi². Mean elevation, 7,790 ft.

PERIOD OF RECORD.--October 1921 to October 1991, May 2000 to current year. Monthly discharge only for some periods, published in WSP 1317. Operated as high-flow station only 1972-76 (discharge for period October 1976 to April 1977 was estimated).

REVISED RECORDS.--WSP 1347: 1931. WSP 1567: Drainage area. WDR ID-77-1: 1974-76(M). WDR-US-2010: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 5,900 ft by barometer. Oct. 3, 1926 to Nov. 5 1934, at site 200 ft downstream at approximately present datum. Prior to Oct. 3, 1926, nonrecording gage at site 200 ft downstream at datum approximately 1.5 ft higher.

REMARKS.--Diversions above station for irrigation of about 10,500 acres (1971 determination).

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 10,400 ft³/s June 17, 1974, gage height, 11.86 ft; minimum, 160 ft³/s, estimated, Nov. 25-30, 1929.