Swansea Vale Railway nineteenth century, when land transport was limited to what pack animals could carry on their backs. At that time the extraction of copper in Cornwall became an important industry, and as a great deal of coal is required to smelt copper, it became the practice to bring the copper to Swansea by ship and smelt it there. This specific sector of the metal industry became so dominant that Swansea was given the nickname "Copperopolis". The works engaged in this industry were located on the banks of the River Tawe at first, but the construction of the Swansea Canal, opened in
Swansea in 1969, which was inherited by the Swansea district when it was formed by the merger of the borough and Gower Rural District in 1974. In 1996, Swansea became one of 22 unitary authorities with the addition of part of the former Lliw Valley Borough. The new authority received the name 'City and County of Swansea' (). Swansea was once a staunch stronghold of the Labour Party which, until 2004, had overall control of the council for 24 years. The Liberal Democrats were the largest group in the administration that took control of Swansea Council in the 2004 local elections