Thompson Falls - Main Channel Dam
Montana — Sanders County — Clark Fork River, Pend Oreille
Location
| State | Montana |
| County | Sanders |
| River | Clark Fork River, Pend Oreille |
| Coordinates | 47.59160, -115.35100 |
Physical Characteristics
| NID Height | 54 ft |
| Dam Height | 50 ft |
| Dam Length | 1,016 ft |
| NID Storage | 24,450 acre-ft |
| Max Storage | 24,450 acre-ft |
| Surface Area | 1,580 acres |
Safety Classification
| Hazard Potential | Low |
| Condition Assessment | Satisfactory |
| EAP Status | Yes |
| Last Inspection | August 31, 2021 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1915 |
| Primary Purpose | Hydroelectric |
| Dam Type | Gravity |
| 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.