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The Penrhyn Quarry Railway first opened in 1798 as the Llandegai Tramway; it became the Penrhyn Railway in 1801 although on a different route. Constructed to transport slate from Lord Penrhyn's slate quarries at Bethesda to Port Penrhyn at Bangor, Wales. The railway was around six miles long and used a gauge of 1 ft 10 3 4 in (578 mm). It is one of the oldest narrow gauge railways in the world; and it was closed in 1962.