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Firebrick works at Risca whose owners worked the Darran Colliery's main drift for fireclay and coal for the kilns, into the 1920s.
| Mine | Region | Years |
|---|---|---|
| Darran Colliery, Risca | Caerphilly | ?–1923 |
Record created: 18 October 2026 · Last researched: 18 October 2026
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