Pit and tunnels. Powder House.***

The highest level features barracks with tall windows, dressing sheds, and a weighbridge, along with several short investigative tunnels and trial workings. The lower levels retain vestiges of a mill and weighbridge, while the incline has several adits in fair condition and a small reservoir alongside. Only the foundations of the roadside mill remain. The old access track contains a well-preserved powder house.

This early 19th-century quarry was developed in the 1860s with the addition of a steam mill and an incline to the road. It employed over 60 men but produced annual tonnage of less than 1000, leading to its failure. A restart occurred in 1872 with a turbine-powered wooden mill constructed at the foot of the incline, where tracks from adits connected to the pit. The 1875 collapse of the reservoir dam severely impacted operations, which limped on until around 1880. Another attempted restart in 1898 failed, and a planned rail link to Criccieth was never built.