Copper was smelted at Penclawdd from some date prior to 1788 until 1811 and again between circa 1848 and 1868 with interruptions. Subsequently the site was used for lead and silver smelting and for tinplate manufacture. One wall of the first smelting works still stands together with an archway that dates from the 1848 rebuilding. The remains of the works own sea-dock also survive (Hughes and Reynolds, entry 31).
Sources:
A Guide to the Industrial Archaeology of the Swansea Region", Association for Industrial Archaeology, 2nd Edition, 1989Site entry by Stephen Hughes for Buildings of Glamorgan, John Newman, 1995
