| Page 1 | Page 2 | Page 3 | Page 4 | Page 5 | Page 6 | Page 7 | Page 8 | Page 9 | Page 10 | Page 11 | Page 12 Aqueducts The Pontcysyllte Aqueduct near Llangollen in North Wales is generally regarded as one of Thomas Telford’s greatest civil engineering achievements. Completed in 1805, it is both the longest and highest aqueduct in Britain, and is a Grade 1 Listed Building. Its construction was revolutionary at the time, as well as its dramatic size and setting, Telford rejected all precedents. 
Pontcysyllte Aqueduct from the northern end in 1954. The aqueduct consists of a cast iron trough supported 126 feet above the river by 19 hollow, tapering masonry piers (pillars). The trough is constructed of wedge shaped and flanged cast iron panels held together and supported by cast iron arches with a span of 45 feet. Each casting dovetails into the next. To seal the ironwork, the joints were caulked with Welsh flannel dipped in boiling sugar, and then sealed with lead. The ironwork for the trough was supplied locally by William Hazeldine from his foundry in Plas Kynaston. 
An early hire cruiser on Pontcysyllte Aqueduct in 1969. Although the navigable channel is only 7 feet wide, the water trough is 12 feet wide with the towpath cantilevered over it. This arrangement prevents boats from piling up water in the channel ahead of them as they move forward through the trough. The construction of the aqueduct took 10 years to complete and cost £47,000. It was a matter of great pride to Telford that only one man was killed in this extraordinary enterprise. The aqueduct was opened on 26th November 1805, in the presence of some 8,000 people. 
Hurleston Junction house on the Ellesmere Canal in 1959. This has since been demolished. Telford also designed many ancillary buildings associated with the aqueduct and canal such as house for the workers and warehouses for the storage of goods.  Warehouses at the end of the Ellesmere Arms in Ellesmere town, 1958. | 
