Lake Oahe & Lake Sharpe

Lake Oahe

Lake Oahe is a large reservoir behind the Oahe Dam on the Missouri River; it begins in central South Dakota and continues north into North Dakota in the United States. The lake has an area of 370,000 acres and a maximum depth of 205 ft. By volume, it is the fourth-largest reservoir in the US. Lake Oahe has a length of approximately 231 mi and has a shoreline of 2,250 mi. 51 recreation areas are located along Lake Oahe, and 1.5 million people visit the reservoir every year. The lake is named for the 1874 Oahe Indian Mission.

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Lake Sharpe

 Lake Sharpe is a large reservoir impounded by Big Bend Dam on the Missouri River in central South Dakota, United States. The lake has an area of 56,884 acres (230.20 km2) and a maximum depth of 78 ft (24 m).[1] Lake Sharpe is approximately 80 mi (130 km) long, with a shoreline of 200 mi (320 km).[1] Lake Sharpe is the 54th largest reservoir in the United States. The lake starts near Ft. Thompson and stretches upstream to Oahe Dam, near Pierre. The lake is located within the following counties: Buffalo, Lyman, Hyde, Hughes, and Stanley. The Big Bend of the Missouri is about 7 miles (11 km) north of the dam. 

Wikipedia