4 pits with tunnels. Some pits filled with landfill. Prominent S shaped traway leads toward tipping area and Bryngwyn Incline.
Publications (2)
- le Neve Foster, C. (1896); Mines & Quarries Report-North Wales; 57 pages
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Blaen y Cae - 328m
Gallt y Fedw - 390m
Allt Llechi - 398m
Pen y Bryn - 489m
Tal y Sarn - 666m
Dorothea - 694m
Twll Balast - 725m
Cloddfa Lon Twll Mawr - 736m
Pwll Fanog - 785m
Pen yr Orsedd - 851m
Wern Ifan - 853m
Cornwall - 885m
Cloddfa'r Coed - 965m
Coed Madog - 1,184m
Gwernor - 1,391m
Twll John Fowc - 1,394m
Gwernor - 1,402m
Nantlle Vale - 1,505m
Ty Mawr West - 1,547m
Ty Mawr Green - 1,621m
Braich Rhyd - 1,627m
Ty'n y Weirglodd - 1,672m
Braich - 1,695m
Plas Du - 1,787m
Tanrallt - 1,821m
Fron - 1,828m
Singrig - 1,922m