Working with collapsed tunnels.*

Several pits are still visible across the landscape, alongside collapsed tunnel systems. A network of tramway formations crisscrosses the terrain, accompanied by rubbish runs. The ruins of small ancillary buildings are scattered throughout the site, and the foundations of what may have constituted a small steam-powered mill can still be identified among the remains.

This slate working began its operations from the mid-nineteenth century, initially functioning alongside the Goodmans concern. The two businesses were subsequently brought together in 1878 when they amalgamated with Cefn Du. A tramway system was constructed to connect the various workings to the Ffridd incline. The quarry maintained a steady output of approximately one thousand tons per year, with one of the pits becoming particularly distinguished for its production of red slate.