Lake Francis Case
Lake Francis Case is a large reservoir impounded by Fort Randall Dam on the Missouri River in south-central South Dakota, United States. The lake has an area of 102,000 acres (410 km2) and a maximum depth of 140 ft (43 m). Lake Francis Case has a length of approximately 107 mi (172 km) and has a shoreline of 540 mi (870 km). The lake is the eleventh-largest reservoir in the United States and is located within the counties of: Charles Mix, Gregory, Lyman, Brule, and Buffalo. The lake stretches from Pickstown, South Dakota upstream to Big Bend Dam.
| Lake Francis Case | |
|---|---|
Fort Randall Dam, with Lake Francis Case in the background | |
Lake Francis Case Lake Francis Case | |
| Location | South Dakota, United States |
| Coordinates | 43°03′35″N 98°33′43″W |
| Type | Reservoir |
| Primary inflows | Missouri River, White River |
| Primary outflows | Missouri River |
| Catchment area | 263,480 sq mi (682,400 km2) |
| Basin countries | United States |
| Max. length | 107 mi (172 km) |
| Surface area | 102,000 acres (41,000 ha) |
| Max. depth | 140 ft (43 m) |
| Water volume | 5,700,000 acre⋅ft (7.0 km3) |
| Shore length1 | 540 mi (870 km) |
| Surface elevation | 1,355 ft (413 m) |
| Settlements | Pickstown, Oacoma, and Chamberlain |
| 1 Shore length is not a well-defined measure. | |
The reservoir is named for former United States Senator Francis Higbee Case, of South Dakota.
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