Underground. Tunnel to chambering.*
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
 
         
    
Jan 1st, 2024 from GWSI by Buddle-Bot
| North Wales | |
| Llan Ffestiniog | |
| 52.954848, -3.8948961 | |
| SH 7280 4140 | |
| Private Land | |
| 260m | |
| #1,549 | 
Underground. Tunnel to chambering.*
 Cwm Cynfal - 65m
Cwm Cynfal - 65m Bryn-Glas - 808m
Bryn-Glas - 808m Bron y Rhiw - 815m
Bron y Rhiw - 815m Cwm Cynfal - 1,138m
Cwm Cynfal - 1,138m Hafod Fawr - 1,203m
Hafod Fawr - 1,203m Y Cefn - 1,651m
Y Cefn - 1,651m Drum - 1,699m
Drum - 1,699m Carters - 1,901m
Carters - 1,901m