Powys Metal Mines Survey
lies in the community of Llanidloes Without in the county of Powys. It is located at Ordnance Survey national grid reference SN98008400.
The mine is recorded in the CPAT Historic Environment Record as number 5939 and this number should be quoted in all correspondence.
The vein trends east-west and outcropped on the eastern slopes of Gorn Hill in Silurian rocks of the Frongoch formation. Mineralisation includes galena with zincblende with barytes.
Stoping up to the surface is drained by a deep adit from the east. A ventilation shaft is situated at the top of the hill at SN98138403.
A water powered air pump distributed air by means of wooden pipes. A single covered waterwheel drove the crushing machinery. The wheel is described as a 20ft diameter overshot type driving a single pair of smooth rolls. A leat runs up the valley to a now
Ore bins, jiggers, a crusher, slimes pits and a washing/picking floor were present. The dressing floors are poorly preserved at the foot of the hill in an overgrown area close to the deep adit at SN98108410.
A counting house, smithy, mine office and storesheds were formerly in existence but only low rubble platforms remain where the buildings stood. Barracks are believed to have been situated either at Cwm or Newchapel but these were almost certainly
prefabricated structures and no surviving remains could be found.
Overall the preservation of the dressing floors and ancillary buildings is poor.
This HTML page is reproduced from the Powys and Clwyd Metal Mine Surveys which were undertaken between May 1992 and December 1993 by Mark Walters and Pat Frost of the Clwyd Powys Archaeological Trust with financial support from Powys County Council, Clwyd County Council and Cadw: Welsh Historic Monuments. Further information about this site is available in CPAT's Regional Historic Environment Record.
Page produced by Rachel Stebbings and Chris Martin.