Ironstone and coal levels east of Plymouth Ironworks, which by 1876 were recorded by Ordnance Survey as being 'old' (1st edition, Glamorgan XII, 6). The levels were linked to Plymouth Ironworks (NPRNs 34114; 34853) by Coedcae Incline and Clyn-mil Incline (now vanished).

Photographed during aerial reconnaissance by RCAHMW on 16th October 2008.
L. Osborne, 23rd November 2012.