A copper mine adit located within the Clogwyn copper mine (NPRN 33768) and situated at the top of an inclined plane. The adit remains partially open and has retaining walls on either side. It measures up to 3m wide by 2m high and the retaining walls extend for at least 4.5m. The site is marked on the OS 1st Edition mapping. P.J. Schofield, OANorth, 30th January 2008