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    NPRN413496
    Map ReferenceSH55NE
    Grid ReferenceSH5596555040
    Unitary (Local) AuthorityGwynedd
    Old CountyCaernarfonshire
    CommunityDolbenmaen
    Type Of SiteRESERVOIR
    PeriodPost Medieval, 20th Century
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    Description
    Llyn Cwellyn is a large reservoir that supplies drinking water to parts of Gwynedd and Anglesey. It is located near Snowdon and the the village of Rhydd Du, adjacent to the A4085.

    Claire Parry, RCAHMW, 29 March 2011

    SOURCE: www.snowdoniaguide.com