| Name | Location | County | Country | Power source | Type | Function | River |
| Felin yr Ynys, Bryn-crug | Bryn-crug | Merionethshire | United Kingdom | Water | Watermill | Corn mill | Fathew |
| Perth-y-cyttiau saw mill, Bryn-crug | Bryn-crug | Merionethshire | United Kingdom | Water | Watermill | Saw mill | Fathew |