It was located at Corris Uchaf about 5 miles north of Machynlleth, in Gwynedd, north-west Wales.

The 1841 census shows that at least one slate miner was boarding at Craig-y-Fachddu Farm, though he may have been working one of the other local quarries.

Orchard began operations again by 1880 and in 1882 produce 4,173 tons of finished slate, worth £11,600 (equivalent of £1,475,742 in 2019).

[3] A reconstituted Abercorris Slate & Slab Quarry Company was begun in June 1890, again led by J.W.

This operation continued with limited success, and after the turn of the century it began to struggle.