Lake Koocanusa Reservoir
| Reservoir Name | Lake Koocanusa |
| Dam Name | Libby |
| River | Kootenai River |
| Administration City | Montana |
| Country | United States |
| Year | 1973 |
| Dam Height | 129 |
| Dam Length | 881 |
| Area(Sqkm) | 97.9 |
| Area(Polygonal) | 97.9 |
| Capital Expenditure | 7434.2 |
| Depth(M) | 75.9 |
| Avg Displacement Of Water | 351216 |
| Catchment Area In Sqkm | 23324 |
| Main Usage | Hydroelectricity |
| Status | 2: Good |
| Longitude | -115.31625 |
| Latitude | 48.412083 |
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