Madison Dam
Montana — Madison County
Location
| State | Montana |
| County | Madison |
| Coordinates | 45.47000, -111.63840 |
Physical Characteristics
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 257 ft |
| NID Storage | 42,053 acre-ft |
| Max Storage | 42,053 acre-ft |
| Surface Area | 3,900 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | — |
| Last Inspection | — |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1907 |
| Primary Purpose | Hydroelectric |
| Dam Type | — |
| Owner Type | — |
| Owner | NorthWestern Energy |
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.