MineArchiveDavid Williams of Ynyscynon
The Aberdare coal owner known by his bardic name Alaw Goch, who held Ynyscynon, Treaman, Deep Dyffryn and Navigation collieries; Treaman, or Williams' Pit, was sold to Powell Duffryn after his death.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Deep Duffryn Colliery | Rhondda Cynon Taf | 1850–1856 |
| Treaman Colliery | Rhondda Cynon Taf | 1853–? |
Record created: 11 October 2026 · Last researched: 11 October 2026