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The company that took the Snowdon workings on in 1898 and built the crushing mill on the shore of Llyn Llydaw; the mine took its lasting name from it.
| Mine | Region | Years |
|---|---|---|
| Britannia Copper Mine | Gwynedd | 1898–1915 |
Record created: 25 August 2026 · Last researched: 25 August 2026
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