Percy Dam, located in Pennington, South Dakota, is a privately-owned earth dam completed in 1956.
Wind
Humidity
With a height of 21 feet and a length of 700 feet, the dam serves the primary purpose of managing water resources along the TR-CHEYENNE river. Managed by the Natural Resources Conservation Service, Percy Dam has a maximum storage capacity of 80 acre-feet and normal storage of 55 acre-feet, with a maximum discharge capacity of 1240 cubic feet per second.
Despite its low hazard potential, Percy Dam is regulated by the South Dakota Department of Environment and Natural Resources. The dam has not been rated for its condition as of yet, but regular inspections, permitting, and enforcement ensure its ongoing safety and functionality. While there are no associated structures or emergency action plans prepared for Percy Dam, its role in water resource management in the region is significant, making it an essential part of the local climate and water resource infrastructure.
Year Completed |
1956 |
Dam Length |
700 |
Dam Height |
21 |
River Or Stream |
TR-CHEYENNE |
Primary Dam Type |
Earth |
Hydraulic Height |
21 |
Nid Storage |
80 |
Hazard Potential |
Low |
Nid Height |
21 |
Cheyenne River Near Wasta
|
190cfs |
Elk Cr Near Elm Springs Sd
|
0cfs |
Rapid Cr Near Farmingdale Sd
|
85cfs |
White R Near Interior Sd
|
50cfs |
Belle Fourche River Near Elm Springs
|
17900cfs |
Battle Cr Below Hermosa Sd
|
8cfs |
| Location | Reservations | Toilets |
|---|---|---|
Sage Creek
|
||
Sage Creek Campground
|
||
Buffalo gap national grassland
|