Libby Dam
High HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Montana |
| County | Lincoln |
| Nearest City | LIBBY |
| River/Stream | KOOTENAI RIVER |
| Coordinates | 48.41029, -115.31427 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 422 ft |
| Dam Length | 2,890 ft |
| Year Completed | 1973 (53 years old) |
Storage & Hydraulics
| NID Storage | 6,027,000 acre-ft |
| Max Storage | 6,027,000 acre-ft |
| Normal Storage | 5,809,000 acre-ft |
| Surface Area | 46,500 acres |
| Drainage Area | 8,985 sq mi |
| Max Discharge | 150,000 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | USACE - Seattle District |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not Available |
| Last Inspection | 07/16/2025 |
| Emergency Action Plan | Yes |