Lefel Fawr is a rock-cut level established in about 1796, with a stone-built tramway bridge (nprn 34641) of around 1824 over the River Tawe adjacent, and a manager's house and office (nprn 25714) of the early nineteenth century.
(Source: Collieries of Wales, RCAHMW)
B.A.Malaws, RCAHMW, 26 May 2011.