Madison Dam
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Madison |
| Nearest City | Three Forks, MT |
| River/Stream | Madison River |
| Coordinates | 45.47000, -111.63840 |
Physical Characteristics
| Dam Type | Timber Crib |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 257 ft |
| Year Completed | 1907 (119 years old) |
Storage & Hydraulics
| NID Storage | 42,053 acre-ft |
| Max Storage | 42,053 acre-ft |
| Normal Storage | 41,917 acre-ft |
| Surface Area | 3,900 acres |
| Drainage Area | 2,181 sq mi |
| Max Discharge | 7,700 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | NorthWestern Energy |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/25/2021 |
| Emergency Action Plan | Yes |