| Name | Location | County | Country | Power source | Type | Function | River |
| Pandy, Cefn-ddwysarn, Bala | Bala, Llandderfel | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Nant Cefn-Coch |
| Woollen Factory, Cefn-ddwysarn, Bala | Bala, Llandderfel | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Mynach |