Flooded pit, incline and winch.**
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Pwll Fanog - 137m
Allt Llechi - 301m
Cloddfa'r Coed - 302m
Cornwall - 321m
Blaen y Cae - 362m
Gallt y Fedw - 400m
Dorothea - 495m
Coed Madog - 520m
Cilgwyn - 666m
Twll Balast - 869m
Twll John Fowc - 893m
Ty Mawr West - 950m
Nantlle Vale - 965m
Gwernor - 972m
Cloddfa Lon Twll Mawr - 1,004m
Pen y Bryn - 1,027m
Ty Mawr Green - 1,052m
Ty'n y Weirglodd - 1,058m
Gwernor - 1,067m
Plas Du - 1,133m
Tanrallt - 1,166m
Wern Ifan - 1,180m
Singrig - 1,264m
Pen yr Orsedd - 1,425m
Twll Coed - 1,484m
Twll Llwyd - 1,636m
Taldrwst - 1,668m
Fronlog - 1,764m
Nant y Fron - 1,804m
Ty'n y Llwyn - 1,909m