MineArchiveGlenavon Garw Collieries Limited
Owned by R. McEwen and W. F. Gibb of Port Talbot; opened and operated Glenrhondda Colliery from 1911.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Etna Colliery | Rhondda Cynon Taf | 1923–1928 |
| Glenavon Colliery | Neath Port Talbot | 1907–? |
| Glenrhondda Colliery | Rhondda Cynon Taf | 1911–1947 |
| Glynogwr Colliery | Rhondda Cynon Taf | 1911–1947 |
| Nantewlaeth Colliery | Neath Port Talbot | ?–? |
Record created: 1 September 2026 · Last researched: 1 September 2026