Voivis Reservoir
| Reservoir Name | Voivis |
| Dam Name | Polyphyto |
| River | Aliakmon Polyphyto |
| Near City | Kozani |
| Administration City | West Macedonia |
| Country | Greece |
| Year | 1974 |
| Dam Height | 112 |
| Dam Length | 296 |
| Area(Sqkm) | 56.2 |
| Area(Polygonal) | 56.2 |
| Capital Expenditure | 2244 |
| Depth(M) | 39.9 |
| Avg Displacement Of Water | 46493 |
| Catchment Area In Sqkm | 5844 |
| Main Usage | Hydroelectricity |
| Status | 3: Fair |
| Longitude | 22.100417 |
| Latitude | 40.30125 |
List all Dams and Reservoirs