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    NPRN276207
    Map ReferenceSH76NW
    Grid ReferenceSH7003066510
    Unitary (Local) AuthorityGwynedd
    Old CountyCaernarfonshire
    CommunityCaerhun
    Type Of SiteRESERVOIR
    PeriodPost Medieval
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    Description
    Llyn Dulyn reservoir, natural feature but adapted for hydro-electric use in late 19th century. Work started on a dam in 1878 which was finished in 1881(JONES.RS/CAP/2003).