| Lake Decatur | |
|---|---|
  Lake Decatur  Lake Decatur | |
| Location | Decatur, Illinois |
| Coordinates | 39°49′N 88°56′W / 39.817°N 88.933°W |
| Lake type | Reservoir |
| Primary inflows | north Upper Sangamon watershed |
| Primary outflows | Sangamon River |
| Catchment area | 925 sq mi (2,396 km2) |
| Basin countries | United States |
| Surface area | 4.2 sq mi (11 km2) |
| Average depth | 7.9 ft (2.4 m) |
| Water volume | 21,000 acre⋅ft (0.026 km3) |
| Shore length1 | 30 mi (48 km) (1922) |
| Surface elevation | 613 ft (187 m) |
| 1 Shore length is not a well-defined measure. | |
Lake Decatur is a 2,800-acre (11 km2) reservoir located in the city of Decatur, Illinois, USA, east of downtown. The city and lake both share the name of U.S. Navy Commodore Stephen Decatur. The lake is 613 feet (187 m) above sea level and has a watershed of 925 square miles (2,400 km2) or 592,000 acres (240,000 ha) reaching into parts of seven counties. The largest lake on the Sangamon River, it was created in 1920–1922.[1]
- ^ Illinois Atlas and Gazetteer. Freeport, Maine: DeLorme Mapping. 1991. ISBN 0-89933-213-7.