LOCATION.-- Lat 45o17'44", long 96o26'38", in NE1/4NW1/4 sec. 16, T.121 N., R.46 W., Big Stone County, Hydrologic Unit 07020001, on left bank 400 ft downstream from bridge on U.S. Highway 12 and 1,300 ft downstream from dam at outlet of Big Stone Lake, at Ortonville. DRAINAGE AREA.-- 1,160 mi2. PERIOD OF RECORD.-- February 1938 to current year.