Lake Sharpe is a large reservoir impounded by Big Bend Dam on the Missouri River in central SD. The lake has an area of 230.20 km2 and a maximum depth of 24 m. The lake is about 130 km long, with a shoreline of 320 km. It's the 54th largest reservoir in the country. The lake starts near Ft. Thompson and stretches upstream to Oahe Dam, near Pierre.