Alwen
| Dam Name | Alwen |
| River | Alwen |
| Near City | Denbigh |
| Administration City | Wales |
| Country | United Kingdom |
| Year | 1916 |
| Dam Height | 30 |
| Dam Length | 122 |
| Area(Sqkm) | 0.6 |
| Area(Polygonal) | 0.6 |
| Capital Expenditure | 14.5 |
| Depth(M) | 24.2 |
| Avg Displacement Of Water | 658 |
| Catchment Area In Sqkm | 23 |
| Main Usage | Water supply |
| Status | 2: Good |
| Longitude | -3.562083 |
| Latitude | 53.062917 |
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