Sully Dam
South Dakota — Sully County — OKOBOJO
Location
| State | South Dakota |
| County | Sully |
| River | OKOBOJO |
| Coordinates | 44.70831, -100.19560 |
Physical Characteristics
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 1,470 ft |
| NID Storage | 2,640 acre-ft |
| Max Storage | 2,640 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | — |
| EAP Status | Not Required |
| Last Inspection | October 20, 2022 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1938 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | State |
| Owner | GF&P |
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.