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Reopened Pantdreiniog quarry in 1872 with 50 workers, producing 1,500 tons of slate a year.
| Mine | Region | Years |
|---|---|---|
| Pantdreiniog Quarry | Gwynedd | 1872–1884 |
Record created: 30 August 2026 · Last researched: 30 August 2026
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