| Name | Location | County | Country | Power source | Type | Function | River |
| Fulling mill, Aberllefenni | Aberllefenni, Corris | Merionethshire | United Kingdom | Water | Watermill | Fulling mill | Nant Ceiswyn |
| Slate mill, Aberllefenni | Aberllefenni, Corris | Merionethshire | United Kingdom | Water | Watermill | Quarry mill/wheel, Slate mill | Dulas |