Pit. Several buildings remain.**
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Blaen y Cae - 125m
Dorothea - 316m
Allt Llechi - 321m
Cilgwyn - 390m
Tal y Sarn - 400m
Cornwall - 519m
Twll Balast - 521m
Pwll Fanog - 537m
Cloddfa Lon Twll Mawr - 626m
Pen y Bryn - 635m
Cloddfa'r Coed - 689m
Wern Ifan - 795m
Coed Madog - 897m
Twll John Fowc - 1,004m
Gwernor - 1,004m
Gwernor - 1,028m
Pen yr Orsedd - 1,032m
Nantlle Vale - 1,117m
Ty Mawr West - 1,169m
Ty Mawr Green - 1,236m
Ty'n y Weirglodd - 1,299m
Plas Du - 1,440m
Tanrallt - 1,476m
Singrig - 1,579m
Twll Coed - 1,751m
Braich Rhyd - 1,907m
Twll Llwyd - 1,921m
Taldrwst - 1,997m