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 Sound on 1170MW and DAB and lastly, the Adult Contemporary-orientated 102.1 Swansea Bay Radio on FM and DAB. The city also has a community radio station Radio Tircoed. It is also served by two regional radio stations: Heart South Wales on its Swansea area frequency (106.0FM) and Nation Radio on its Swansea area frequency (107.3FM) and DAB. The patients and staff at Singleton Hospital can listen to the hospital radio station, Radio City 1386AM and Swansea University also runs its own radio station, Xtreme Radio, on 1431 AM. Providing the DAB service, the local multiplex called Swansea SW Wales is