MineArchiveUnited National Collieries Ltd
The company into which the Risca collieries were amalgamated in 1892. By that December it employed 1,050 men and 102 horses at the New Pit alone, and the Risca collieries were described as among the largest in South Wales.
Mines operated
| Mine | Region | Years |
|---|---|---|
| Black Vein Colliery | Caerphilly | 1908–1921 |
| Bute Colliery | Rhondda Cynon Taf | ?–? |
| Lady Margaret Colliery | Rhondda Cynon Taf | 1915–1947 |
| Risca New Pit | Caerphilly | 1892–1928 |
| Tylecoch Colliery | Rhondda Cynon Taf | 1917–? |
| Ynyshir Colliery | Rhondda Cynon Taf | 1912–? |
Record created: 3 September 2026 · Last researched: 3 September 2026