A trial copper mine located on the cliffside at Clogwyn Coch. It consists of an open stope working measuring 10m deep by 2.5m wide and extending 20m up the cliffside. There is an associated spoil heap situated to the north which measures 15m long by 8m wide. There is a small miners shelter and test area constructed on top of the spoil heap. The site is marked on the OS 1st Edition mapping. P.J. Schofield, OANorth, 30th January 2008