Hillside workings on several levels with a number of inclines. Remains of drumhouses and water power. Some underground extraction.***
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Publications (2)
- BGS - Mine Plans (large, zoomable) - Cwm Machno Slate Quarries Ltd, Cwm Penmachno In The Parish Of Penmachno In The County Of Caernarvonshire Workings In The North Vein Slate; 1 pages
- Richards, Alun John (1991); Gazeteer of the Welsh Slate Industry, A; Gwasg Carreg Gwalch 978-0863811968
