Slough Arm

Slough Arm
The Slough Arm near Cowley
Specifications
Locks	1 stop gate
Status	navigable
History
Principal engineer	Alfred Walker
Date of act	1879
Date completed	1882
Date closed	1960
Date restored	1975
Geography
Start point	Slough
End point	Cowley Peachey
Connects to	Grand Union Canal

The Slough Arm is a short canal branch from the Grand Union Main Line to Slough in Berkshire (before 1974 in Buckinghamshire), England. It was originally opened to serve the brick-making industry. The last commercial traffic was carried in 1960, but as the plans to fill it in were opposed locally, the stretch was re-opened in 1975 and has remained in-use since.

With the demand for bricks for the buildings of London continuing to increase, a canal branch to Slough was first proposed in 1878 by Hubert Thomas. It would run from Bulls Bridge on the Grand Union Canal (then the Grand Junction Canal) to Slough, where new brickworks would be opened. Thomas completed a survey in 1879, and the route was altered slightly, with the junction moving to Cowley Peachey. An Act of Parliament was sought, which was opposed by the Great Western Railway, but despite this, the Act was passed in July 1879, although the Slough end was truncated back to Stoke Road, as the original terminus would have crossed lands owned by the Duke of Leeds and Eton College.

Construction began at the Cowley Peachey Junction in early 1880, overseen by Alfred Walker, who had recently constructed the Melton Mowbray Canal. The route included a major cutting and embankment at Iver, which were started in February and May respectively. By April 1881, work was also in progress at the Slough end. The major earthworks at Iver were completed in June 1882, and the canal opened throughout on 4 December 1882. It was about 5 miles (8 km) long, and did not require any locks.

Walker remained after the canal opened to oversee the construction of wharves and landing places, to sort out any problems resulting from settlement of the formation, and to ensure that traffic developed in a satisfactory way. This he seemed to achieve, for in 1905 the canal conveyed 192,000 tons of cargo, mainly bricks, sand and gravel, for which the tolls were £7,164. A number of tramways facilitated the carriage of goods to the canal wharves.

From the peak year of 1905, a steady decline set in. Cargoes of bricks and gravel sustained the canal through the 1920s and 1930s but by the 1940s, the deposits of clay and gravel were becoming exhausted. The pits were then used for landfill, which provided some traffic, and there was a trade in timber, which was delivered to Slough Wharf, but the last commercial use of the canal was in March 1960. With the British Waterways Board taking over the canals in the 1960s, the Arm was not considered worth saving.