Photographic postcard. Swing bridges are hydraulically operated bridges which can be moved laterally through 90 degrees so as to give unobstructed acces to shipping. Nine road bridges were built acros the Manchester Ship Canal, seven of which were swing bridges. The Trafford Road Swing Bridge which was built acros the canal between Manchester Docks and Pomona Docks in 1892. It is the largest and heaviest of the ship canal's swing bridges, weighing 1800 tonnes. In 1998 the Trafford Road Swing Bridge was refurbished and fixed in place as part of a scheme to widen the road crosing to a dual carriageway, with a new bridge built alongside.
© Science Museum / Science & Society Picture Library