Ponca Right Dike
South Dakota — Gregory County — Willow Creek
Location
| State | South Dakota |
| County | Gregory |
| River | Willow Creek |
| Coordinates | 43.06097, -99.14477 |
Physical Characteristics
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 130 ft |
| NID Storage | 828 acre-ft |
| Max Storage | 828 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | August 6, 2020 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1994 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Earth |
| Owner Type | Federal |
| Owner | BIA |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.