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Opened Cwmciwc Colliery at Brynna, near Llanharan, in 1904 and employed 19 men there in 1907.
| Mine | Region | Years |
|---|---|---|
| Cwmciwc Colliery | Rhondda Cynon Taf | 1904–1907 |
Record created: 11 October 2026 · Last researched: 11 October 2026
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