Oakwood Colliery (Pontrhydyfen)
in the Afan Valley, Neath Port Talbot
This undertaking consisted of numerous slants and pits, started c.1848 by the Company of Copper Miners. The first was abandoned in 1851 and the last when the mine closed in 1927.
1853 Accident at No. 13 Pit: Three killed when rubbish fell down the balance pit.
By 1869 the owners were the Governor and Company of Copper Mines.
1884 James Lewis killed in an accident. Mine owners: Cwmavon Estate and House Co.
1896 Owners: Wright, Butler and Co.
By 1908 the owners were Baldwins Ltd
By 1912 owned by the Oakwood Colliery Co.
1920 An explosion occurred on 18 November when three miners were killed and two others were injured.
By 1923 the owners were Tymaen Colliery Co.
1927 Mining ceased.
The above information is mainly drawn from the Welsh Coal Mines website[1] also includes a list of some of the individual slants and the dates when they were abandoned.