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    NPRN261161
    Map ReferenceSN96SW
    Grid ReferenceSN9222763475
    Unitary (Local) AuthorityPowys
    Old CountyBrecknockshire
    CommunityLlanwrthwl
    Type Of SiteVALVE TOWER
    PeriodModern
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    Description
    1. Nant Gro reservoir valve tower, as marked on OS map of 1905 (RSJ 2000)