Westminster Mine, Llanarmon was a lead/ silver mine which was in operation from 1873 until 1913. The mine worked the eastern end of the Westminster Vein. The site lies to the east of a small graveyard and plot once occupied by Moriah Chapel. A run of collapsed shafts and waste heaps lie in the fields running north from the Quarry owned by Stoddards Silicon Quarries. Smith (1921) details an engine shaft sunk through stratas of sandstone and chert. The 1st edition OS map details this engine house with its shaft to the south at SJ21605675. No apparent structural evidence remains, although the sett was worked by the Llanarmon District Mining Company until 1913. A second shaft lay to the west of engine shaft.
Source: CPAT [Accessed 12th July 2011].
L. Moore, RCAHMW, 12th July 2011