[1] The station was opened on 4 August 1852 as the terminus of Monmouthshire Railway and Canal Company's Western Valleys line to Blaina and Ebbw Vale.

[4] By May 1855 the Western Valley line was connected to the Eastern Valley line at Mill Street station,[5] although Dock Street station continued to act as a terminus.

[6] On 12 May 1880, all Western Valley trains were diverted via this new chord to High Street station.

[3] London and North Western Railway services from the Sirhowy branch followed on 1 June 1880.

[3][2] The line between Dock Street and Pill Bank Junction remained open for goods traffic until 1991.