D: Dock Street Goods   Maindee Junctions The Rumney Railway in Wales was a 4 ft 2 in (1,270 mm) plateway built to connect the ironworks at Rhymney to the Monmouthshire Canal Company's tramroad near Newport, providing a connection the wharves at the Newport Docks.

It made a junction with the Monmouthshire line at the top end of that part of the company's route, known as the Park Mile, on its way to the shipping places on the River Usk at Newport.

Sir Charles Morgan built and maintained the section where it ran through the park of his Tredegar House.

[2] The line operated in a similar way to a toll road and traders introduced steam locomotives in the 1840s.

However, little was done to improve the line and it remained a plateway until it was acquired by the Brecon and Merthyr Railway by its Act of 28 July 1863.