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Opened Bryn-y-Garn Colliery on Hirfynydd above Seven Sisters in 1976 and held it until 1979.
| Mine | Region | Years |
|---|---|---|
| Bryn-y-Garn Colliery | Neath Port Talbot | 1976–1979 |
Record created: 10 October 2026 · Last researched: 10 October 2026
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