MineArchiveGreat Western Railway
The railway company bought the Gyfeillion colliery outright from John Calvert in 1854 after a three-month trial, having been its largest customer, and worked it directly and profitably until putting it up for sale in 1864 as part of a wider disposal of non-railway assets.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Avon Colliery | Neath Port Talbot | 1877–1912 |
| Great Western Colliery | Rhondda Cynon Taf | 1854–1865 |
Record created: 3 September 2026 · Last researched: 3 September 2026