Small mine producing slab situated between Cwmorthin and Rhosydd. 2 adits leading to chambering. **

Three chambers open to surface. Also adit above the path leading to one of the chambers. Remains of incline leading to small set of buildings with slate columns as launder supports.

The mill once housed eight saws, two planers, and one slate-dressing machine; although much adapted for agricultural use today, the wheel pit and supports for the launder (water channel) survive. The tramway route serving the quarry remains clearly traceable across the landscape.

Small, compact underground slate quarry operating from 1854 until 1909, primarily producing slab. In its later years, it was run by a local syndicate, but it never achieved large-scale output. Initial production approached four figures, but for most of its life, output was about a quarter of that amount. Employment rarely exceeded 20 workers, eventually declining to just two part-time workers from nearby Rhosydd quarry. Slate blocks were lowered down an incline to a modest water-powered mill. After 1875, finished slate products were transported using an extension of the Cwmorthin Tramway.