Flooded pit. Remains of buildings.*
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Gwernor - 191m
Twll John Fowc - 199m
Nantlle Vale - 315m
Ty Mawr Green - 446m
Ty Mawr West - 508m
Ty'n y Weirglodd - 631m
Cornwall - 656m
Dorothea - 700m
Plas Du - 919m
Twll Balast - 933m
Cloddfa'r Coed - 939m
Coed Madog - 943m
Tanrallt - 951m
Tal y Sarn - 972m
Pwll Fanog - 998m
Gallt y Fedw - 1,004m
Twll Coed - 1,026m
Singrig - 1,041m
Blaen y Cae - 1,099m
Cloddfa Lon Twll Mawr - 1,103m
Allt Llechi - 1,204m
Twll Llwyd - 1,218m
Wern Ifan - 1,244m
Fronlog - 1,357m
Cilgwyn - 1,391m
Taldrwst - 1,428m
Pen y Bryn - 1,438m
Nant y Fron - 1,561m
Pen yr Orsedd - 1,756m
Tyddyn Agnes - 1,901m