MineArchiveW. H. Owen and Sons
Proprietors of the Vulcan Foundry, Caernarfon, recorded as operators of Glanrafon slate quarry, Rhyd Ddu, from 1879, the years in which it grew with the North Wales Narrow Gauge Railway into the largest quarry in Cwm Gwyrfai.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Glanrafon Quarry | Gwynedd | 1879–? |
Record created: 21 October 2026 · Last researched: 21 October 2026