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