The Halt lay between Pontypool Crane Street to the south and Abersychan to the north.
By 1 June 1854 the double line was extended from Pontypool Crane Street to Abersychan.
[note 1] Stations were initially provided at Pontnewynydd, Abersychan, Cwmavon and Blaenavon.
Three trains per day were run, taking one hour to complete the journey.
The lower line track was lifted from Blaenavon to Trevethin Junction shortly afterward.