MineArchiveHolywell-Halkyn Mining and Tunnel Company
Began construction of the Milwr Tunnel, a major drainage tunnel, in 1897.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Halkyn Mountain | Flintshire | 1897–? |
| Milwr Tunnel | Flintshire | 1896–1928 |
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