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    NPRN505711
    Map ReferenceSH56SE
    Grid ReferenceSH5574560464
    Unitary (Local) AuthorityGwynedd
    Old CountyCaernarfonshire
    CommunityLlanberis
    Type Of SiteTRAMWAY TUNNEL
    PeriodPost Medieval
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    Description
    Tunnel entrance into Chwarel Cefn Du quarry (NPRN 400667). The tunnel is unroofed on the eastern end where it can be accessed and the cutting is mostly filled with spoil. P.J. Schofield, OANorth, 26th June 2007