A canal tunnel is a tunnel for a canal. The building of a canal tunnel is crucial to help a waterway that is normally used for shipping cross a difficult section of terrain. They are also constructed to reduce the dependency on canal locks.
The longest canal tunnel in the world is the Rove Tunnel in France, currently disused. Other notable examples of canal tunnels include the proposed Stad Ship Tunnel in Norway, a proposed tunnel for sea going vessels, Standedge Tunnel, the longest, deepest and highest in the United Kingdom and Harecastle Tunnel, another noteworthy tunnel in the UK.
The oldest canal tunnel in the world is the Malpas Tunnel also in France, built in 1679.
In some canal tunnels the towpath continues through the tunnel. In other cases, especially on English narrow canals, there is no towpath. The horse would be led over the hill and the boat would be propelled by legging.
The term "canal tunnel" is not commonly applied to tunnels used to conduct water (for irrigation, water supply, etc.), such as the 48-kilometre-long Arpa-Sevan tunnel in Armenia (see List of longest tunnels), or a number of tunnels on the Irtysh–Karamay–Ürümqi Canal in China. For those, the term water tunnel is more commonly used.
The Thames and Medway Canal is a disused canal in Kent, south east England, also known as the Gravesend and Rochester Canal. It was originally some 11 km (6.8 mi) long and cut across the neck of the Hoo peninsula, linking the River Thames at Gravesend with the River Medway at Strood. The canal was first mooted in 1778 as a shortcut for military craft from Deptford and Woolwich Dockyards on the Thames to Chatham Dockyard on the Medway, avoiding the 74 km (46 mi) journey round the peninsula and through the Thames estuary. The canal was also intended to take commercial traffic between the two rivers.
A tunnel is an underground passageway, dug through surrounding soil, earth or rock, and enclosed except for the entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods.
The Chesapeake and Ohio Canal, abbreviated as the C&O Canal and occasionally called the "Grand Old Ditch," operated from 1831 until 1924 along the Potomac River between Washington, D.C. and Cumberland, Maryland. It replaced the Potomac Canal, which shut down completely in 1828, and could operate during months in which the water level was too low for the former canal. The canal's principal cargo was coal from the Allegheny Mountains.
The Llangollen Canal is a navigable canal crossing the border between England and Wales. The waterway links Llangollen in Denbighshire, north Wales, with Hurleston in south Cheshire, via the town of Ellesmere, Shropshire. The name, which was coined in the 1980s, is a modern designation for parts of the historic Ellesmere Canal and the Llangollen navigable feeder, both of which became part of the Shropshire Union Canals in 1846.
A horse-drawn boat or tow-boat is a historic boat operating on a canal, pulled by a horse walking beside the canal on a towpath.
The Huddersfield Narrow Canal is an inland waterway in northern England. It runs just under 20 miles (32 km) from Lock 1E at the rear of the University of Huddersfield campus, near Aspley Basin in Huddersfield, to the junction with the Ashton Canal at Whitelands Basin in Ashton-under-Lyne. It crosses the Pennines by means of 74 locks and the Standedge Tunnel.
A canal pound, reach, or level, is the stretch of level water impounded between two canal locks. Canal pounds can vary in length from the non-existent, where two or more immediately adjacent locks form a lock staircase, to many kilometres/miles.
The Standedge Tunnels are four parallel tunnels through the Pennine hills at the Standedge crossing between Marsden in Kirklees, West Yorkshire and Diggle in Oldham, Greater Manchester in northern England. Three are railway tunnels and the other is a canal tunnel. Before boundary changes in 1974, both ends of the tunnels were in the West Riding of Yorkshire.
Dudley Tunnel is a canal tunnel on the Dudley Canal Line No 1, England. At about 3,172 yards (2,900.5 m) long, it is now the second longest canal tunnel on the UK canal network today.. However, since the Dudley Tunnel is not continuous this status is sometimes questioned:.
Harecastle Tunnel is a canal tunnel on the Trent and Mersey Canal in Staffordshire between Kidsgrove and Tunstall. The tunnel, which is 1.6 mi (2.6 km) long, was once one of the longest in the country. Its industrial purpose was for the transport of coal to the kilns in the Staffordshire Potteries. The canal runs under the 195 m (640 ft) Harecastle Hill near Goldenhill, the highest district in Stoke-on-Trent.
The Sapperton Canal Tunnel is a tunnel on the Thames and Severn Canal near Cirencester in Gloucestershire, England. With a length of 3,817 yards (3,490 m), it was the longest tunnel of any kind in England from 1789 to 1811.
Camden Lock is a small part of Camden Town, London Borough of Camden, England, which was formerly a wharf with stables on the Regent's Canal. It is immediately to the north of Hampstead Road Locks, a twin manually operated lock. The twin locks together are "Hampstead Road Lock 1"; each bears a sign so marked. Hawley Lock and Kentish Town Lock are a short distance away to the east; to the west is a long level pound — it is 27 miles (43 km) to the next lock.
A roving bridge, changeline bridge, turnover bridge, or snake bridge is a bridge over a canal constructed to allow a horse towing a boat to cross the canal when the towpath changes sides. This often involved unhitching the tow line, but on some canals they were constructed so that there was no need to do this by placing the two ramps on the same side of the bridge, which turned the horse through 360 degrees. On the Macclesfield Canal this was achieved by building spiral ramps and on the Stratford-upon-Avon Canal and others by constructing roving bridges of iron in two cantilevered halves, leaving a slot in the middle for the tow rope. This was also called a split bridge. For cost reasons many ordinary Stratford bridges were also built in this way as they had no towpath.
The BCN Main Line, or Birmingham Canal Navigations Main Line describes the evolving route of the Birmingham Canal between Birmingham and Wolverhampton in England.
The South Pennine Ring is an English canal ring which crosses the Pennines between Manchester and Huddersfield. It covers parts of five canals, and includes passage through the longest canal tunnel in Britain. It has only been possible to cruise it since 2002, when restoration of the Huddersfield Narrow Canal provided the return route across the Pennines.
Legging is a method of moving a boat through a canal tunnel or adit containing water. This method of navigating through canal tunnels and adits was commonly used in canal tunnels during the 18th and early 19th centuries.
Josiah Clowes (1735–1794) was a noted English civil engineer and canal builder. His early years were spent running a canal carrying company with Hugh Henshall, and although he worked on some canal projects before 1783, that year marked his switch to being an engineer. His first major project included the Sapperton Tunnel on the Thames and Severn Canal, which despite huge engineering difficulties, gained him a reputation which enabled him to become the first great tunnelling engineer, responsible for three of the four longest canal tunnels built.
The Horseboating Society is a national society, with the primary aim being the preservation and promotion of Horseboating on the canals of Great Britain. The Society was founded on 19 January 2001 at the Ellesmere Port Boat Museum, and it is the only organisation in the UK solely dedicated to horseboating.
The Canal & River Trust (CRT), branded as Glandŵr Cymru in Wales, holds the guardianship of 2,000 miles of canals and rivers, together with reservoirs and a wide range of heritage buildings and structures, in England and Wales. Launched on 12 July 2012, the Trust took over the responsibilities of the state-owned British Waterways in those two places.
The Seven Wonders of the Waterways is a list of landmarks on the navigable waterways of the United Kingdom. The list was originally compiled in 1946 by Robert Aickman, co-founder of the Inland Waterways Association (IWA), at a time when the waterways network was largely derelict. Today, the Canal & River Trust—formerly British Waterways—has jurisdiction over all of the sites except for the Barton Swing Aqueduct, which is owned and operated by the Bridgewater Canal Company.
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