Geology: Silurian Frongoch Formation. The veins trend on a NE-SW strike and are part of an extension of the Castell vein to the west. Mineralisation includes lead, silver and zinc.
Workings: The western workings consist of two shafts at SN82138453,SN82458478 and an adit at SN82468480.
Transport: Short stretches of tramway extend from the shaft to the spoil heaps on the western mine.
Power: The 1869 pumping, winding and sawmill waterwheel was supplied by a leat from the Cyff Brook on the western side of the River Wye. A 30ft wheel powered the crusher. A large reservoir is located at SN83158521 which supplied water to the dressing floors.
Processing: The western dressing floors had the usual range of ore bins, a crusher, jigs and buddles. A small reservoir is present. The present remains are poorly preserved at basal foundation level.
Other features: Four miners cottages were built in 1876 on the western mining area. Traces of the foundations can be seen. There are also remains of a mine office and possible smithy/carpenters shop . R.S. Jones, Cambrian Archaeological Projects, 2004.
