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In the early 1970s, the time when I learnt about industrial archaeology from the Arkwright Society based in Cromford, there was a sense of urgency about witnessing, if not safeguarding, relics of the Industrial Revolution that were deteriorating and going out of use.
The Arkwright Society had among its members Leslie Bradley (1902-2004), formerly headmaster of Derby School from 1942 to 1961, who led a succession of canal day-trips which were themselves an education. Leslie knew his way around the canal system because he had, like Tom Rolt, converted a narrow boat to a leisure craft before many other people took to the idea.
In 1973 Leslie ran a trip including potentially a last chance to experience taking a boat through the Anderton Boat Lift. This unique survivor was built in 1875, rebuilt in 1906-08, and was clearly nearing the end of its useful life.
It was built to provide a more efficient link between the Weaver Navigation which served the Cheshire salt beds and the Trent & Mersey Canal, which connected with the industrial heart of the Midlands and the waterways of northern England.
The Lift replaced the collection of chutes, cranes and inclined planes dating from the end of the eighteenth century that transhipped freight up and down the fifty-foot vertical distance between the two waterways.
It was designed by Sir Edward Leader Williams (1828-1901), the chief engineer of the North Staffordshire Railway which owned the Trent & Mersey Canal, as a development of the lifts designed by James Green (1781-1849) for the Grand Western Canal in Devon. Sir Edward proposed an iron tower containing two caissons, side by side, to lift and lower floating narrow boats, powered by hydraulic rams assisted when necessary by a steam engine.
The Weaver Navigation Act (1872) empowered the river trustees to construct the lift, which opened to canal traffic on July 26th 1875. Boats gain access from the river at the base of the lift which stands on an island in the middle of the river, like Williams’ later Barton Swing Aqueduct (1893). At the top of the structure an iron aqueduct leads vessels into the canal on its embankment.
The polluted canal water that powered the hydraulics repeatedly caused difficulties with the machinery over the following three decades. The trustees were advised by their engineer Colonel John Arthur Saner (1864-1952) to install a system of electric motors and counterweights which would be cheaper and easier to maintain and had the advantage that the caissons could operate independently rather than in tandem. However, the full 252-ton weight of the water-filled caissons was no longer cushioned by the rams, so Colonel Saner reinforced the structure with steel A-girders to support pulleys that led the wire ropes which bore the load.
The conversion from hydraulic to electric power took place within two years, 1906-08, and operated efficiently until the 1970s, despite increasing doubts about the effect of atmospheric pollution on the integrity of the structure. A 1983 inspection revealed such severe corrosion that the Lift was closed immediately.
Fortunately, it had been listed as a Scheduled Monument in 1976, so there was no likelihood it would be dismantled, but it stood idle until an admirable £7,000,000 restoration programme brought it back to life in 2000-02.
The Lift is now once more hydraulic-powered using oil, and the redundant A-frames and pulleys remain to show how the structure looked for most of its working life. The heavy counterweights were not replaced, and now form a maze in the grounds of the two-storey visitor centre.
Now the traffic is no longer salt but people – leisure boaters and day visitors.
I’m glad to think that Leslie Bradley lived long enough to know of the restoration. It was industrial-archaeology pioneers like him who helped to save for future generations a priceless legacy of mementos of British industrial genius.