Pit with mill and collapsed Blondin masts.***
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Gallt y Fedw - 125m
Allt Llechi - 204m
Cilgwyn - 328m
Tal y Sarn - 362m
Dorothea - 428m
Pwll Fanog - 493m
Cornwall - 557m
Twll Balast - 637m
Cloddfa'r Coed - 663m
Pen y Bryn - 672m
Cloddfa Lon Twll Mawr - 727m
Coed Madog - 879m
Wern Ifan - 890m
Pen yr Orsedd - 1,069m
Twll John Fowc - 1,081m
Gwernor - 1,099m
Gwernor - 1,135m
Nantlle Vale - 1,186m
Ty Mawr West - 1,220m
Ty Mawr Green - 1,298m
Ty'n y Weirglodd - 1,344m
Plas Du - 1,462m
Tanrallt - 1,496m
Singrig - 1,598m
Twll Coed - 1,790m
Braich Rhyd - 1,915m
Twll Llwyd - 1,954m