Yard Bridge is a fine stone-built semi-circular span with circular openings in the spandrels at the side of the arch. The bridge was built circa 1824 by Daniel Harper to carry a tramroad over the gorge of the River Tawe, giving access to Lefel Fawr on the south-east bank of the river. Lefel Fawr was opened circa 1796 and was originally intended to be an underground branch of the Swansea Canal.

Source: Stephen Hughes and Paul Reynolds (1989) 'A Guide to the Industrial Archaeology of the Swansea Region' Association for Industrial Archaeology and additional RCAHMW notes by Stephen Hughes,

RCAHMW, 12 October 2011