All Aqueducts

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Aqueducts that carry the canal over rivers, roads and valleys, with their location and the waterway they’re on.

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Pontcysyllte Aqueduct

Pontcysyllte Aqueduct carries the Llangollen Canal 38 m (about 125 ft) above the River Dee between Froncysyllte and Trevor, near Llangollen in Wrexham County Borough. At 307 m (1,007 ft) it is the longest aqueduct in Great Britain. Boats cross in a cast-iron trough supported on 19 spans and 18 hollow stone piers. The trough takes one boat at a time, and the towpath runs along one side only. It was built for the Ellesmere Canal between 1795 and 1805. William Jessop was the principal engineer and Thomas Telford the general agent, with ironwork by William Hazledine. It is one of the earliest iron canal aqueducts and one of the most influential. The aqueduct is Grade I listed and a Scheduled Monument. It is the centrepiece of the Pontcysyllte Aqueduct and Canal World Heritage Site, inscribed in 2009, which covers 18 km of canal from Horseshoe Falls to Gledrid Bridge, including Chirk Aqueduct. Trevor Basin is at the northern end. The canal is managed by the Canal & River Trust (Glandŵr Cymru). Waterway: Llangollen Canal Opened: 26 November 1805 Length and height: 307 m long, 38 m above the river Heritage: Grade I listed (Cadw 1601); Scheduled Monument; World Heritage