The pit now lies submerged beneath water. Several structures remain standing, though all are in a ruinous state.

Quarrying began here in 1867 on a site with earlier workings dating back to around 1760, traditionally attributed to Cornish copper miners from Drws y Coed. The processing mill was built on a waste bank and served by a Blondin aerial ropeway. In 1882, seventy men worked at the quarry, producing 1,040 tons, with output increasing further as the nineteenth century drew to a close. The operation benefited from a connection to the Nantlle Railway. From 1899 onwards, waste material was transported across the River Llyfni to the south using a timber bridge, which gave way in 1927. The quarry later merged with Tal y Sarn before being absorbed into Dorothea in 1921.