The Slough Arm was a short canal branch from the Grand Union Main Line to Slough in Buckinghamshire, England. Its main purpose was to service the brick making industry. It opened in 1882, and carried its last commercial traffic in 1960. Plans to fill it in were opposed locally, and it was re-opened in 1975.
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 the Stoke Poges 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 completed construction of 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 wharfs 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 wharfs.
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.
The route of the canal starts at its junction with the Grand Union Canal, where there are a set of stop gates, and immediately crosses three aqueducts, over the Fray's River and the Colne Brook. Passing under the M25 motorway, it enters the Iver cutting, to emerge near the main line railway from Paddington. The two routes pass along the northern edges of Slough, and then the canal diverges northwards, to end at the Stoke Poges road. Apart from the last mile, it is surprisingly rural in nature.
The route of the canal starts at its junction with the Grand Union Canal, where there are a set of stop gates, and immediately crosses three aqueducts, over the Fray's River and the Colne Brook. Passing under the M25 motorway, it enters the Iver cutting, to emerge near the main line railway from Paddington. The two routes pass along the northern edges of Slough, and then the canal diverges northwards, to end at the Stoke Poges road. Apart from the last mile, it is surprisingly rural in nature.
