Tunnel to pit. Produced green slate.*
Publications (1)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
Hendre Eirian
Slate Quarry
Jan 1st, 2024 from GWSI by Buddle-Bot
| North Wales | |
| Dyffryn Ardudwy | |
| 52.764932, -4.0689528 | |
| SH 6050 2060 | |
| Private Land | |
| 150m | |
| #1,594 |
Egryn - 100m
Egryn - 1,518m- Ffridd Olchfa - 1,538m