| Name | Location | County | Country | Power source | Type | Function | River |
| Gro Mill, Elan Valley | Elan Valley, Rhayader | Radnorshire | United Kingdom | Water | Watermill | Corn mill, Saw mill | Elan |
| Nant Gwylt Saw Mill, Elan Valley | Elan Valley, Rhayader | Radnorshire | United Kingdom | Water | Watermill | Saw mill | Nant Gwyllt |