| Gibson Lake | |
|---|---|
&sq=Qlik&lang=&file=File:USA_Indiana_relief_location_map.svg)  Gibson Lake &sq=Qlik&lang=&file=File:Usa_edcp_relief_location_map.png) Gibson Lake | |
| Location | Gibson Generating Station, Montgomery Township, Indiana |
| Coordinates | 38°21′N 87°46′W / 38.35°N 87.76°W |
| Type | reservoir (cooling pond) |
| Primary inflows | Lake Fill Pumps, Plant Water Discharges, Mc Carthy Ditch |
| Primary outflows | Patoka River, Plant Water Intakes |
| Basin countries | United States |
| Max. length | 1.5 mi (2.4 km) |
| Max. width | 2 mi (3.2 km) |
| Surface area | 2,900 acres (1,200 ha) |
| Average depth | 15 ft (4.6 m) |
| Max. depth | 24 ft (7.3 m) |
| Water volume | 7,100,000,000 US gal (0.027 km3) |
| Residence time | 2 weeks |
| Shore length1 | 6 mi (9.7 km) (includes the central splitter dike) |
| Surface elevation | 350 ft (110 m) |
| Frozen | never |
| Islands | none |
| Settlements | Mount Carmel, Illinois (2 miles NW of the lake) |
| 1 Shore length is not a well-defined measure. | |
Gibson Lake is the cooling pond for Duke Energy Indiana's Gibson Generating Station. Measuring at around 3,500 acres (14 km2), it is the largest lake in Indiana built completely above ground, its shores consisting of rock levees on all but two of the lake's six sides both of which were also built up to build the power plant. Opened to fishing in 1978, Gibson Lake had been a prime source of bass and several types of catfish, bluegill, and carp. The lake was closed to fishing in 2007, due to elevated levels of selenium found in the water of the lake.[1] The only entrance to Gibson Lake is the lake's boat ramp, located due southeast of the plant on Gibson County Road 975 South.
Gibson Lake, due to it never getting colder than 40 °F (4 °C), caused by the hot outflows from the plant's condensers, is known to produce a little dusting of snow every now and then.