Pontypridd Graig railway station

Although the line was opened for mineral traffic on 18 July 1889 to take coal from Rhondda to the Docks, the passenger service did not start until 16 March 1896 after much lobbying from local residents along the line.

Train journeys commenced at Pontypridd because the Taff Vale was not willing to allow direct competition with its own services from Porth to Cardiff Queen Street.

[1] Passenger services along the former Barry line north of Tonteg Junction were diverted via Treforest Low Level (also on the former Taff Vale Railway) and Pontypridd Central from 5 May 1930,[2] and Pontypridd Graig station was closed.

The tunnel mouth is situated in the grounds of Dewi Sant Hospital car park, just behind the modern day Pontypridd railway station, on Albert Road, the Graig, Pontypridd.

The other end of the tunnel is in the grounds of the University of South Wales, which is some distance away.