LOCATION.--Lat 43° 37'35", long 112° 03'56" (NAD27), in SE1/4 SE1/4 sec.35, T.4 N., R.37 E., Jefferson County, Lewisville quad., Hydrologic Unit 17040201, on left bank 15 ft upstream from county line highway bridge, 5.0 mi southwest of Lewisville, and at mile 815.3.

DRAINAGE AREA.--9,100 mi², approximately, excluding nontributary area on Snake River Plain.

PERIOD OF RECORD.--June 1978 to November 1982 (discontinued).

GAGE.--Water-stage recorder. Elevation of gage is 4,750 ft above NGVD of 1929, from topographic map.

REMARKS.--Some regulation by Jackson Lake, Palisades Reservoir, Island Park Reservoir, Henrys Lake (sta 13039000), and Grassy Lake. Diversions above station for irrigation of about 700,000 acres. Considerable water leaks above station into the Snake Plain aquifer.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 24,800 ft³/s June 11, 1981, gage height, 9.04 ft; minimum, 1,130 ft³/s Oct. 28, 1981, gage height, 2.14 ft.