|08/08/1878||Pontypridd, Caerphilly and Newport Railway|
Act passed. Promoted by J.C. Parkinson of the Alexandra Docks and Railway and Sir George Elliot of Powell Duffryn Collieries. Double track line to run from south of the Taff Vale Railway's Pontypridd station (Pontypool, Caerphilly and Newport Junction Railway) to Caerphilly (Penrhos Upper Junction) on the Rhymney Railway. Running powers over the Brecon and Merthyr Railway's Caerphilly Branch to Machen and on to Bassaleg Junction with the Alexandra Docks and Railway. Engineer Sir James W. Szlumper.
|/ /1884||Pontypridd, Caerphilly and Newport Railway|
Taff Vale Railway works line from Pontypridd to near Alexandra Docks.
|07/07/1884||Pontypridd, Caerphilly and Newport Railway|
First attempt to open new route. Train departs Pontypridd but is blocked by the Great Western Railway at Bassaleg Junction.
|/04/1886||Pontypridd, Caerphilly and Newport Railway|
Owned section of track through Park Mile is opened to West Mendalgief Junction. Route authorised to east of existing lines, but is swapped with Great Western Railway for use of original westernmost route. Great Western Railway moves sideways onto new tracks.
|06/07/1897||Pontypridd, Caerphilly and Newport RailwayAlexandra (Newport and South Wales) Docks and Railway|
Pontypridd, Caerphilly and Newport Railway taken over by Alexandra (Newport and South Wales) Docks and Railway.
|01/01/1899||Great Western Railway|
Takes over the Pontypridd, Caerphilly and Newport Railway's Newport to Pontypridd passenger service.
|01/09/1904||Alexandra (Newport and South Wales) Docks and Railway|
New service from Pontypridd (Tram Road) Halt on the Pontypridd, Caerphilly and Newport Railway, east of the Taff Vale Railway station, to Caerphilly started. Uses two steam railmotors built by the Glasgow Railway Engineering Works (Glasgow Railway and Engineering Company) of Govan. Seven halts opened on route.
|10/07/1922||Pontypridd, Caerphilly and Newport Railway|
Tram Road Motor Halt, Pontypridd, closed when the Great Western Railway arranges for Newport trains to use the Taff Vale Railway's Pontypridd station.
|17/09/1956||Pontypridd, Caerphilly and Newport Railway|
Caerphilly Branch (Brecon and Merthyr Railway)
Passenger service from Pontypridd to Caerphilly and Machen withdrawn.
|29/07/1967||Pontypridd, Caerphilly and Newport Railway|
Pontypridd to Glyntaff goods depot closed.
This line is divided into a number of portions.