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The company that developed Brynkinalt Colliery on the estate of that name at Chirk during the 1860s, the southernmost pit of the North Wales coalfield.
| Mine | Region | Years |
|---|---|---|
| Brynkinalt Colliery | Wrexham | 1860–1880 |
Record created: 9 September 2026 · Last researched: 9 September 2026
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