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A Tredegar company that owned the Gwrhay level near Argoed by 1908, working it with the Waterloo colliery.
| Mine | Region | Years |
|---|---|---|
| Gwrhay Colliery | Caerphilly | 1908–1918 |
Record created: 2 October 2026 · Last researched: 2 October 2026
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