| Name | Location | County | Country | Power source | Type | Function | River |
| Felin Newydd, Rhydymain | Rhydymain, Brithdir and Llanfachreth | Merionethshire | United Kingdom | Water | Watermill | Corn mill | Wnion |
| Llwyn Saw Mill, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Saw mill | Wnion |