Poncysyllte Aqueduct was built between 1795 and
1805 to carry the Ellesmere Canal across the valley of the River Dee.
The principal engineer for the canal was William Jessop 1745 -1814. The
General agent was Thomas Telford 1757-1834, then a little known county
surveyor, but to become the most prolific civil engineer of the early
nineteenth century. By the time that Pontcysyllte was completed in 1805,
it was the third iron canal aqueduct to be built in the world.
It is an aqueduct of 19 spans, which crosses the River Dee at a height
of 38m (125ft). It is 307m (987ft) in length. The spans are of cast iron
plates which are bolted at their flanges. The trough containing the water
is constructed of segmental plates with radiating flanges to the outside.
The 18 piers are constructed of finely dressed stone, and hollow in parts.
The four piers in the river Dee have pronounced cutwaters.
Listed Grade I for its important contribution to the development of the
canal engineering and the structural use of cast iron, and as an internationally
renowned monument of the Industrial Revolution. It is located within Trevor
Basin Conservation Area.
Church of St