| Name | Location | County | Country | Power source | Type | Function | River |
| Waterwheels, Blaen y Cwm Quarry, Blaenau Ffestiniog | Blaen y Cwm Quarry, Blaenau Ffestiniog | Caernarfonshire | United Kingdom | Water | Watermill | Quarry mill/wheel |
| Name | Location | County | Country | Power source | Type | Function | River |
| Waterwheels, Blaen y Cwm Quarry, Blaenau Ffestiniog | Blaen y Cwm Quarry, Blaenau Ffestiniog | Caernarfonshire | United Kingdom | Water | Watermill | Quarry mill/wheel |