Diffwys Casson steam powered mill.*
Publications (2)
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
- Richards, Alun John, (1999); The Slate Regions of North and Mid Wales and their Railways; Gwasg Carreg Gwalch; 0863815937
Manod Granite Quarry - 551m
Lefel Dwr Oer - 606m
Bowydd - 918m
Diffwys - 948m
Votty - 1,139m
Manod Bach - 1,227m
Maenofferen - 1,299m
Ffestiniog Granite Quarry - 1,463m
Graig Ddu - 1,495m
South Pole - 1,737m
Glan y Don (Tip and Mill) - 1,766m
Llechwedd - 1,897m
Llechwedd Zipworld - 1,911m
Pant yr afon (Sidings) - 1,918m
Owain Goch (Pump site) - 1,963m