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    Nid oes gennych resi chwilio datblygedig. Ychwanegwch un trwy glicio ar y botwm '+ Ychwanegu Rhes'
    Figure 78. At Pen y Bryn in Nantlle, water wheels on the hillside powered rod-systems operating the pumps in Twll Balast and Old Pen y Bryn pit. The pumps raised the water to the outflows, which took the water through tunnels to where it emptied into the river on the valley floor to the southFurther Information
    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6438463
    Disgrifiad
    Figure 78. At Pen y Bryn in Nantlle, water wheels on the hillside powered rod-systems operating the pumps in Twll Balast and Old Pen y Bryn pit. The pumps raised the water to the outflows, which took the water through tunnels to where it emptied into the river on the valley floor to the south
    Cofnod Casglu
    WSP - Welsh Slate Publication Collection
    Cyfrwng
    Graphic.
    Cychwynnwr
    RCAHMW
    Dyddiad
    2014