Lake Red Rock (Des Moines River)
| Lake Red Rock | |
|---|---|
| Location | Marion County, Iowa, United States |
| Coordinates | 41°24′19″N 93°02′49″W / 41.40528°N 93.04694°W |
| Type | reservoir |
| Primary inflows | Des Moines River |
| Primary outflows | Des Moines River |
| Catchment area | 12,000 sq mi (31,080 km2) |
| Basin countries | United States |
| Max. length | 11 mi (18 km) |
| Surface area | 15,520 acres (62.81 km2) max: 70,000 acres (283.28 km2) |
| Surface elevation | 742 ft (226 m) |
Lake Red Rock, also referred to as Red Rock Reservoir is a reservoir formed by Red Rock Dam on the Des Moines River, about 41 miles (66 km) southeast of the city of Des Moines, Iowa, U.S. The dam was completed in 1969 as a Flood control project by the United States Army Corps of Engineers, creating the largest lake in Iowa. Lake Red Rock was named after one of the lost towns under the reservoir, Red Rock. The lake is essentially confined to Marion County. The damface is a few miles west and south of Pella, and similarly, a few miles northeast of Knoxville.