Lake Elwell Reservoir
| Reservoir Name | Lake Elwell |
| Dam Name | Tiber Dike |
| River | Marias River |
| Administration City | Montana |
| Country | United States |
| Year | 1956 |
| Dam Height | 20 |
| Dam Length | 595 |
| Area(Sqkm) | 65.2 |
| Area(Polygonal) | 65.2 |
| Capital Expenditure | 1757.1 |
| Depth(M) | 26.9 |
| Avg Displacement Of Water | 15378 |
| Catchment Area In Sqkm | 12370 |
| Main Usage | Irrigation |
| Status | 3: Fair |
| Longitude | -111.10375 |
| Latitude | 48.324583 |
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