The Manchester Ship Canal is a 36-mile-long inland waterway in the North West of England linking Manchester to the Irish Sea. Starting at the Mersey Estuary near Liverpool, it generally follows the original routes of the rivers Mersey and Irwell through the historic counties of Cheshire and Lancashire. Several sets of locks lift vessels about 60 feet to the canal's terminus in Manchester. Landmarks along its route include the Barton Swing Aqueduct, the world's only swing aqueduct, and Trafford Park, the world's first planned industrial estate and still the largest in Europe.
The rivers Mersey and Irwell were first made navigable in the early 18th century. Goods were also transported on the Runcorn extension of the Bridgewater Canal and the Liverpool and Manchester Railway, but by the late 19th century the Mersey and Irwell Navigation had fallen into disrepair and was often unusable. In addition, Manchester's business community viewed the charges imposed by Liverpool's docks and the railway companies as excessive. A ship canal was therefore proposed to give ocean-going vessels direct access to Manchester.