Llantrisant and Taff Vale Junction Railway
In time the Canal became overwhelmed by the volume of traffic, and encouraged by the successful opening of railways with more advanced technology than the horse tramways of previous years, the Taff Vale Railway was promoted. It was authorised by Parliament in 1836 and it opened between Merthyr and Cardiff docks in 1841. The line passed close to the Maesmawr workings but did not make a connection.
Rhondda
In conjunction with the sinking of the first colliery at the head of the Rhondda, the second issue of transportation was being tackled at the same time with the extension of the Taff Vale Railway (TVR) line. After Royal Assent was given to construct the railway in 1836, the original line was laid from Cardiff to Abercynon, and by 1841 a branch was opened to link Cardiff with Dinas via Pontypridd. This would allow easier and faster transportation for Walter Coffin's Dinas mine, an unsurprising addition considering Coffin was a director of the TVR. In 1849 the TVR had extended into the Rhondda Fach and by 1856 the railway had reached the furthest areas of both the Fach and Fawr valleys at Maerdy and Treherbert. For the first time the Rhondda Valley was connected by a major transportation route to the rest of Wales and the exploitation of its coalfields could begin.