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    NPRN421175
    Map ReferenceSS99SE
    Grid ReferenceSS9905091840
    Unitary (Local) AuthorityRhondda Cynon Taff
    Old CountyGlamorgan
    CommunityPen-y-graig
    Type Of SiteCOLLIERY
    Period19th Century
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    Description
    Nantgwyn Colliery, Pen-y-graig, sunk in 1892 was the third of four the Naval Steam Collieries.

    References:
    Historic OS mapping
    www.welshcoalmines.co.uk

    RCAHMW, 2015.