Rubble revetment walls with six bastions at irregular intervals which gave access to coaling stages.
(Source: "A Guide to the Industrial Archaeology of the Swansea Region", Association for Industrial Archaeology, 1989)
Most of the stone revetment walls, built in 1863 to carry the Great Western Railway's high-level South Dock Branch alongside South Dock, are believed to survive.
See nprn 34813: Victoria Road Viaduct and nprn 34894: Wind Street Railway Station.
B.A.Malaws, RCAHMW, 08 October 2009.