Grand Union Canal
Grand Union Canal
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Grand Union Canal

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2311560

Grand Union Canal

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Grand Union Canal

The Grand Union Canal in England is part of the British canal system. It is the principal navigable waterway between London and the Midlands. Starting in London, one arm runs to Leicester and another to Birmingham. The Birmingham canal is 137 miles (220 km) with 166 locks. The Birmingham line has a number of short branches to places including Slough, Aylesbury, Wendover, and Northampton. The Leicester line has two short arms of its own, to Market Harborough and Welford.

It has links with other canals and navigable waterways, including the River Thames, the Regent's Canal, the River Nene and River Soar, the Oxford Canal, the Stratford-upon-Avon Canal, the Digbeth Branch Canal and the Birmingham and Fazeley Canal.

The canal south of Braunston to the River Thames at Brentford in London is the original Grand Junction Canal. At Braunston the latter met the Oxford Canal linking back to the Thames to the south and to Coventry to the north via the Coventry Canal. "Grand Union Canal" is also the original name for what is now the Leicester line of the modern Grand Union, running from short east of Braunston to Leicester, and which is now sometimes referred to as the Old Grand Union Canal to avoid ambiguity.

The Grand Union Canal in its current form came into being on 1 January 1929. The Regent's Canal and the Grand Junction Canal agreed that amalgamation and modernisation were the only way to remain competitive against rail and newly developing road transport, and the merger was authorised by the Regent's Canal and Dock Company (Grand Junction Canal Purchase) Act 1928 (18 & 19 Geo. 5. c. xcviii).

A five-mile (eight-km) section of the Oxford Canal forms the main line of the Grand Union between Braunston and Napton-on-the-Hill. Although the Grand Union intended to buy the Oxford Canal and Coventry Canal, these purchases did not take place.

The section of the main line between Brentford and Braunston (formerly the Grand Junction Canal) was built as a 'wide' or 'broad' canal – that is, its locks were wide enough to accommodate two narrowboats abreast (side by side) or a single wide barge up to 14 feet (4.3 m) in beam.

The onward sections from Braunston to Birmingham had been built as 'narrow' canals, that is, the locks could accommodate only a single narrowboat. The Grand Union Canal Act 1931 (21 & 22 Geo. 5. c. xc) was passed authorising a key part of the modernisation scheme of the Grand Union, supported by government grants. The narrow locks (and several bridges) between Napton and Camp Hill Top Lock in Birmingham were rebuilt to take widebeam boats or barges up to 12 feet 6 inches (3.81 m) in beam, or two narrowboats. The canal was dredged and bank improvements carried out: the depth was increased to 5 feet 6 inches (1.68 m) to allow heavier cargoes, and the minimum width increased to 26 feet (7.9 m) to enable two boats of 12 feet 6 inches to pass. Lock works were completed in 1934 when the Duke of Kent opened the new broad locks at Hatton, and other improvements finished by 1937.

These improvements to depth and width were never carried out between Braunston and London. Camp Hill Locks in Birmingham were not widened, as it would have been very expensive and of little point, since they lead only to further flights of locks not in the ownership of the Grand Union. A new basin and warehouse were constructed at Tyseley, above Camp Hill, to deal with this. Although the Grand Union company had a number of broad boats built to take advantage of the improvements, they never really caught on and the canal continued to be operated largely by pairs of narrowboats, whose journeys were facilitated by the newly widened locks in which they could breast up.

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