The Cedryn Quarry Tramway (later largely used as the route of the Eigiau Tramway) was an industrial narrow gauge railway that connected the slate quarries at Cedryn and Cwm Eigiau to the quays at Dolgarrog in the Conwy valley.
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The output of this remote site was initially taken by horse pack to the quays on the River Conwy at Dolgarrog.
Ltd., both of Dolgarrog, and a severe drought in this year prompted the decision to increase water reserves by building a much higher dam.
Dr Thomas Williams (1550–1622), rector of St Peter's Church, Llanbedr-y-Cennin, was charged with having papist sympathies.
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In the 1350s the Black Death took a heavy toll in the lower Conwy Valley, particularly among the bond tenants regulated by the King's officers from Aberconwy, Edward I's new English borough.
Controls were also updated, meaning that the plant can be operated from Dolgarrog in Wales.