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Colliery company of Govilon that owned Gwaelod-y-Waun Colliery near Aberbargoed from 1930 until it closed in 1950.
| Mine | Region | Years |
|---|---|---|
| Gwaelod-y-Waun Colliery | Caerphilly | 1930–1950 |
Record created: 10 October 2026 · Last researched: 10 October 2026
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