Underground workings into side of cliff on 6 levels. Various remains including cut & cover tunnel.***
External Links
Publications (3)
- (1993); CATMHS - Newsletter 034-April; 56 pages
- GCPC (1997); Ogofa 5; pp. 10
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Hafod Arthen - 200m
Glangeirionydd Mine - 618m
Klondyke gorge - 673m
Bryn Cenhadon - 690m
Klondyke - 698m
Gilvyn Ddu - 762m
North Willoughby - 1,208m
Cae'r Gwair - 1,367m
Chwythlyn - 1,441m
Pandora Pontifex Deep Adit - 1,461m
L Beck Trial - 1,654m
Cae'r Hegle - 1,656m
3 Way Beck - 1,685m
Tal y Llyn Mine - 1,699m
Pandora - 1,744m
Pen y Ffridd - 1,799m
Cynllyd - 1,877m
Cornel - 1,919m