Fronhas
| Dam Name | Fronhas |
| River | Alva |
| Near City | Coimbra |
| Administration City | Coimbra |
| Country | Portugal |
| Year | 1984 |
| Dam Height | 62 |
| Dam Length | 250 |
| Area(Sqkm) | 0.9 |
| Area(Polygonal) | 0.9 |
| Capital Expenditure | 89 |
| Depth(M) | 98.9 |
| Avg Displacement Of Water | 6538 |
| Catchment Area In Sqkm | 653 |
| Main Usage | Hydroelectricity |
| Status | 3: Fair |
| Longitude | -8.165417 |
| Latitude | 40.244583 |
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