Hebgen Dam
Montana — Gallatin County — Madison River
Location
| State | Montana |
| County | Gallatin |
| River | Madison River |
| Coordinates | 44.86370, -111.33580 |
Physical Characteristics
| NID Height | 120 ft |
| Dam Height | 88 ft |
| Dam Length | 721 ft |
| NID Storage | 525,620 acre-ft |
| Max Storage | 525,620 acre-ft |
| Surface Area | 13,000 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | August 25, 2021 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1915 |
| Primary Purpose | Hydroelectric |
| Dam Type | Earth |
| Owner Type | Private |
| 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.