Johnson (Oscar) Dam
Iowa — Harrison County
Location
| State | Iowa |
| County | Harrison |
| Coordinates | 41.79110, -95.81890 |
Physical Characteristics
| NID Height | 49 ft |
| Dam Height | 49 ft |
| Dam Length | 530 ft |
| NID Storage | 187 acre-ft |
| Max Storage | 187 acre-ft |
| Surface Area | 6 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Not Rated |
| EAP Status | — |
| Last Inspection | — |
| Inspection Frequency | — |
Dam Information
| Year Completed | 2011 |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | — |
| Owner Type | — |
| Owner | Oscar Johnson |
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.