MineArchiveCoedmadoc Slate Company
Worked Coedmadoc Quarry in the Nantlle Valley, acquiring one of the neighbouring Croesor quarry's two De Winton steam locomotives secondhand in the 1870s.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Coedmadoc Quarry | Gwynedd | ?–? |
Record created: 31 August 2026 · Last researched: 31 August 2026