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Allt-fawr

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Mountain
Location type: Mountain
Location address: United Kingdom, Gwynedd
Number of texts: 1
3 stars
Made by wikipedia.org | Reference Nilfanion | © CC 3.0
Made by wikipedia.org | Reference Wikipedia.org | © CC 3.0

It is on the internal border of Snowdonia National Park, and overlooks the town of Blaenau Ffestiniog, with its numerous slate quarries, as well as the Tanygrisiau reservoir and power station. On the northern slope of Allt-fawr is the Oakeley Quarry, the world’s largest underground slate mine. On the southern slope is the large Cwmorthin Quarry. These two mines are joined underneath the summit of Allt-fawr and the extensive chambering and adits are visible on the surface of the mountain where underground workings have collapsed.

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