| Cold Brook Dam | |
| Location Map: | South Dakota |
| Coordinates: | 43.4541°N -103.4891°W |
| Country: | United States |
| Location: | Fall River County, South Dakota |
| Status: | O |
| Opening: | 1953 |
| Owner: | U.S. Army Corps of Engineers, Omaha District |
| Dam Type: | Embankment |
| Dam Height: | 127 feet |
| Dam Width Crest: | 925 feet |
| Dam Crosses: | Cold Brook Creek |
| Res Name: | Cold Brook Lake |
| Res Capacity Total: | 7,200 acre-feet |
| Res Surface: | 36 acres |
| Website: | U.S. Army Corps of Engineers, Omaha District |
Cold Brook Dam is an earthen dam located near Hot Springs, South Dakota, in Fall River County in the southwestern part of the state, in the southern Black Hills.
The earthen dam was constructed in 1953 by the United States Army Corps of Engineers with a height of 127 feet and a length at its crest of 925 feet.[1] It impounds Cold Brook Creek, a tributary of the Cheyenne River for flood control purposes during flash flood events for nearby Hot Springs. The dam is owned and operated by the Corps of Engineers, Omaha District.
The reservoir it creates, Cold Brook Lake, has a water surface of 36 acres and has a maximum capacity of 7200 acre-feet.[2] Year-round recreation is possible and includes canoeing, fishing, swimming, wildlife viewing, camping, and (in the winter) ice fishing, skating, and cross-country skiing.[3] Cold Brook Lake Recreation Area includes a boat ramp, picnic area, swim beach and campground is managed by the Corps of Engineers.
Cottonwood Springs Dam, another Corps of Engineers dam is located about 5 miles to the southwest.