MineArchiveCwm Machno Slate Quarries Ltd
The company under which the Cwm Machno (Penmachno) quarry traded in its later years, working the North Vein slate until closure in 1962.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Penmachno Quarry | Conwy | ?–1962 |
Record created: 9 September 2026 · Last researched: 9 September 2026