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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6439076
    Disgrifiad
    View of west elevation of Afon Twrch Aqueduct, showing re-built stepped buttresses on upstream side.
    Enw Casgliad
    NMR Site Files
    Cyfrwng
    Photo.
    Cychwynnwr
    RCAHMW
    Dyddiad
    1970 to 1990