Diphwys Casson quarry
Diphwys Casson quarry (sometimes known as Diphwys quarry or Diffwys quarry) was a major slate quarry in the town of Blaenau Ffestiniog, Gwynedd, North Wales. It was one of the major users of the Ffestiniog Railway.
The remains of the main Diphwys Casson mill | |
| Location | |
|---|---|
Diphwys Casson quarry Location in Gwynedd | |
| Location | Blaenau Ffestiniog |
| County | Gwynedd |
| Country | Wales |
| Coordinates | 52.998°N 3.916°W grid reference SH7142946270 |
| Production | |
| Products | Slate |
| Type | Quarry |
| History | |
| Discovered | 1760s |
| Opened | 1800 |
| Active | 1800-1890; 1920-1927 |
| Closed | 1955 |
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