Gloucester and Sharpness Canal
The Gloucester and Sharpness Canal or Gloucester and Berkeley Canal is a canal in the west of England, between Gloucester and Sharpness; for much of its length it runs close to the tidal River Severn, but cuts off a significant loop in the river, at a once-dangerous bend near Arlingham. It was once the broadest and deepest canal in the world. The canal is 26.5km (16.5 miles) long.
18th century conception 
Conceived in the Canal Mania period of the late 18th century, the Gloucester and Berkeley Ship Canal scheme (as it was originally named) was started by architect and civil engineer Robert Mylne. In 1793 an Act of Parliament was obtained authorising the raising of a total of £200,000. The project rapidly encountered financial difficulties - to such an extent that Mylne left the project in 1798. By half way through 1799 costs had reached £112,000 but only 5½ miles of the canal had been completed. Robert Mylne's role was taken over by James Dadford who had originally been engaged as resident engineer on the project in 1795. Lack of funds resulted in the company ceasing to employ Dadford in 1800.
Decade of capital raising 
Between 1800 and 1810 various attempts were made to raise money to allow further building but they came to nothing. Moneys from tolls and rents allowed for some improvements to be made to the basin at Gloucester in 1813.
Eventual completion 
From 1817 onwards the Poor Employment Act meant it was possible for the company to loan money from the Exchequer Bill Loan Commission. This along with further share issues provided enough money to bring the scheme to completion. After these significant delays, the canal opened in April 1827. In the course of its construction the canal had cost £440,000. As opened the canal was 86½ feet wide, 18 feet (5.5 m) deep and could take craft of up to 600 tons. The longer of the two locks onto the canal proper was 115 feet (35 m) long.
Eventual dividends 
By the middle of the nineteenth century it proved possible to pay a small dividend, the debt to the Exchequer Bill Loan Commission having been repaid with the help of a loan of £60,000 from the Pelican Life Assurance Company. In 1871 the last of the debts incurred in the course of funding the canal including the Pelican Life Assurance Company loan were paid off. Where the Severn Railway Bridge (completed in 1879) passed over the canal a swing section was constructed  to avoid restricting headroom.
Early 20th century 
In 1905 traffic exceeded 1 million tons for the first time. Oil was added to the list of cargoes carried by the canal, with bulk oil carriers taking fuel to storage tanks sited to the south of Gloucester. In 1937 the canal was navigated by the submarines HMS H33 and HMS H49.
The canal was nationalized in 1948. At the same time the Sharpness Dock Police which had policed the dock since 1874 were absorbed into the British Transport Police. In 1955 the Board of Survey of Canals and Inland Waterways released a report that, among other things, described the Gloucester and Sharpness Canal as carrying substantial traffic and offering scope for commercial development.
The Purton Hulks 
In 1909, following a collapse in the bank of the river, the canal company's chief engineer Mr A. J. Cullis called for old vessels to be run aground along the bank of the Severn, near Purton, to create a makeshift tidal erosion barrier to reinforce the narrow strip of land between the river and canal. Barges, trows and schooners were "hulked" at high tide, and have since filled with silt. More boats have been added, including the schooner "Katherine Ellen" which was impounded in 1921 for running guns to the IRA, the Kennet Canal barge "Harriett", and ferrocement barges built in World War II. 1999 saw Paul Barnett commence a privately funded research project which saw the site's 81 vessels recorded and recognized as the largest ships' graveyard in mainland Britain. In 2010 British Waterways took control of the site in an attempt to protect it.
Recent history 
Today the canal can be used by boats up to 64m in length, 9.6m in beam and 32m in height. The maximum draft is 3.5 m. By the mid 1980s commercial traffic had largely come to a halt with the canal being given over to pleasure cruisers with the exception of a few passages by grain barges. The oil trade ceased in 1985 with the closure of the petroleum depot at Quedgeley. In order to allow the A430 south-west bypass to be built the canal had to be diverted. The new section of channel was opened on 6 May 2006. In January 2009 a project began to replace the Patch Bridge swing bridge with a motor powered design instead of the current hand cranked system.
See also 
- "Inland Waterways Association: Gloucester and Sharpness Canal". Retrieved 2013-04-24.
- Hadfield (1969), p.342
- Hadfield (1969), p.344
- Hadfield (1969), p.343
- Hadfield (1969), p.345
- Hadfield (1969), p.346
- Hadfield (1969), p.348
- Hadfield (1969), p.351
- Paget-Tomlinson (2006), pp.124–125
- Hadfield (1969), p.352
- Green (1999), p.27
- Tall and Kemp (1996), p.64
- "Waterways Virtual Archive Catalogue". Retrieved 2007-08-28.
- "Sharpness Dock Police (1874 - 1948)". Archived from the original on 2007-09-27. Retrieved 2007-08-28.
- "Uneconomic Canals Use Of 771 Miles "Not Justified"". The Times. April 21, 1955. p. 7.
- "The Purton Hulks". morturn.com - Legacy from the past. Retrieved 2008-10-19.
- "Purton Hulks - maritime history sunk by neglect". telegraph.co.uk (London). 2008-10-18. Retrieved 2008-10-19.
- "The Friends of Purton".
- "Purton Hulks taken over by British Waterways". BBC News. 2010-09-22. Retrieved 2010-10-06.
- "Canal's new channel section opens". BBC News. 2006-05-06. Retrieved 2007-08-25.
- Clare, Rachel (6 January 2009). "Wardens at bird sanctuary travel by boat". stroud news and journal. Retrieved 7 January 2009.
- Colin Green (1999). Severn Traders. Black Dwarf Publications. ISBN 0-9533028-2-2.
- Charles Hadfield (1969). The Canals of South and South East England. David and Charles. ISBN 0-7153-4693-8.
- Edward Paget-Tomlinson (2006). The Illustrated History of Canal & River Navigations (3rd edition). Landmark Publishing Ltd. ISBN 1-84306-207-0.
- J.J. Tall; Paul Kemp (1996). HM Submarines in Camera An Illustrated History of British Submarines. Sutton Publishing. ISBN 0-7509-0875-0.
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