68-587: The Exeter Ship Canal , also known as the Exeter Canal is a canal leading from (and beside) the River Exe to Exeter Quay in the city of Exeter , Devon , England . It was first constructed in the 1560s, predating the " canal mania " period, and is one of the oldest artificial waterways in the UK. At the start of Exeter's history, the River Exe was tidal and navigable up to the city walls enabling it to be
136-547: A caisson of water in which boats float while being moved between two levels; and inclined planes where a caisson is hauled up a steep railway. To cross a stream, road or valley (where the delay caused by a flight of locks at either side would be unacceptable) the valley can be spanned by a navigable aqueduct – a famous example in Wales is the Pontcysyllte Aqueduct (now a UNESCO World Heritage Site ) across
204-510: A drainage divide atop a ridge , generally requiring an external water source above the highest elevation . The best-known example of such a canal is the Panama Canal . Many canals have been built at elevations, above valleys and other waterways. Canals with sources of water at a higher level can deliver water to a destination such as a city where water is needed. The Roman Empire 's aqueducts were such water supply canals. The term
272-415: A "cistern", or depressed area just downstream from the fall, to "cushion" the water by providing a deep pool for its kinetic energy to be diffused in. Vertical falls work for drops of up to 1.5 m in height, and for discharge of up to 15 cubic meters per second. The transport capacity of pack animals and carts is limited. A mule can carry an eighth-ton [250 pounds (113 kg)] maximum load over
340-536: A busy port. In the 1270s or 1280s, the Countess of Devon , Isabella de Fortibus , built a weir across the river to power her mills (this weir is remembered in the name of the nearby suburb Countess Wear ). This had the effect of cutting off Exeter's port from the sea and damaging its salmon fisheries. In 1290, trade with Exeter's port was restored, only to be blocked by a new weir built in 1317 by Hugh de Courtenay, 9th Earl of Devon (Isabella's cousin), who also built
408-496: A canal has a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as slack water levels , often just called levels . A canal can be called a navigation canal when it parallels a natural river and shares part of the latter's discharges and drainage basin , and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its valley . A canal can cut across
476-607: A canal to bypass the weirs and rejoin the River Exe in the centre of the city where a quay would be built. Work began in February 1564, and was completed in Autumn 1566 or early 1567. The canal had three locks with vertical gates – the first pound locks to be built in Britain. They accommodated boats up to 16 tonnes. The original cut was 3 feet (0.91 m) deep and 16 feet (4.9 m) wide (0.9 m by 5 m). It ran one and three and
544-618: A cargo of timber in December 1973. However, the ship Countess Weir continued to use the canal. It had been built in 1963 as a sludge carrier, and was used to take sewage sludge from the Exeter sewage works out to sea, where it was dumped. It was originally named SW2 , but became the Countess Weir in 1974. It was operated by the city council, who owned the treatment works, and had to be modified slightly in 1975, as it would not fit under
612-413: A combination of the three, depending on available water and available path: Smaller transportation canals can carry barges or narrowboats , while ship canals allow seagoing ships to travel to an inland port (e.g., Manchester Ship Canal ), or from one sea or ocean to another (e.g., Caledonian Canal , Panama Canal ). At their simplest, canals consist of a trench filled with water. Depending on
680-549: A journey measured in days and weeks, though much more for shorter distances and periods with appropriate rest. Besides, carts need roads. Transport over water is much more efficient and cost-effective for large cargoes. The oldest known canals were irrigation canals, built in Mesopotamia c. 4000 BC , in what is now Iraq . The Indus Valley civilization of ancient India ( c. 3000 BC ) had sophisticated irrigation and storage systems developed, including
748-430: A mix of Georgian and Victorian buildings, repurposed for modern use, including the custom house which dates from 1681. The basin has seen a lot of redevelopment, including residential buildings in a mock warehouse style, with the older buildings finding new uses as antique shops, cafes, restaurants and studios. The canal basin itself is popular for a range of water sports, including canoeing, rowing and kayaking. Throughout
SECTION 10
#1732765576456816-463: A quarter miles (5.2 km) from just below the Countess Weir to the centre of Exeter. This navigation was not very effective; it could not be entered at all states of the tide, and the double transfer of cargo over such a short distance made it uncompetitive with road transport. The weir that maintains the water level in the quay is still named "Trew's Weir" after the canal's builder. In 1677
884-521: A quay at Topsham . Because of the blockages on the river, boats were forced to unload at Topsham and the earls were able to exact large tolls to transport goods to Exeter. For the next 250 years the city petitioned the King to have the waterway reopened, to no avail, until 1550 when Edward VI finally granted permission. However, it was by then too late because the river channel had silted up. In 1563, Exeter traders employed John Trew of Glamorgan to build
952-581: A rather low gradient for its time. The canal is still in use after renovation. In the Middle Ages , water transport was several times cheaper and faster than transport overland. Overland transport by animal drawn conveyances was used around settled areas, but unimproved roads required pack animal trains, usually of mules to carry any degree of mass, and while a mule could carry an eighth ton, it also needed teamsters to tend it and one man could only tend perhaps five mules, meaning overland bulk transport
1020-459: A uniform altitude. Other, generally later, canals took more direct routes requiring the use of various methods to deal with the change in level. Canals have various features to tackle the problem of water supply. In cases, like the Suez Canal, the canal is open to the sea. Where the canal is not at sea level, a number of approaches have been adopted. Taking water from existing rivers or springs
1088-462: A view to transferring responsibility, but the talks were ended in December, with the council unhappy about the cost and likely outcomes of the action. They have since been looking at ways to increase the volume of boat traffic using the canal, but the major obstacles to this are the lifting bridge and swing bridge at Countess Weir, which carry separate carriageways of the A38 road over the canal. Opening
1156-422: Is a channel that cuts across a drainage divide , making a navigable channel connecting two different drainage basins . Both navigations and canals use engineered structures to improve navigation: Since they cut across drainage divides, canals are more difficult to construct and often need additional improvements, like viaducts and aqueducts to bridge waters over streams and roads, and ways to keep water in
1224-635: Is part of the Pennon Group . South West Water was formed in 1989 when the water industry in the United Kingdom was privatised. It is responsible for the supply of the region's drinking water, the treatment and disposal of sewage, and the protection of inland and bathing waters. It is regulated by Ofwat , the Water Services Regulation Authority, being required to conform to United Kingdom standards. Water from
1292-590: Is part of the Pennon Group . The following public utilities were taken over by the South West Water Authority in 1973: † Only the area of the authority which drained into the River Lim. It was the subject of an episode of the fly-on-the-wall documentary Back to the Floor in 1997. The main source of the water supplied by South West Water is the twenty reservoirs they own, with 90% of
1360-701: Is presumed, introduced in Italy by Bertola da Novate in the 16th century. This allowed wider gates and also removed the height restriction of guillotine locks . To break out of the limitations caused by river valleys, the first summit level canals were developed with the Grand Canal of China in 581–617 AD whilst in Europe the first, also using single locks, was the Stecknitz Canal in Germany in 1398. In
1428-599: Is rarely less than 30 metres (98 ft) wide. In the 5th century BC, Achaemenid king Xerxes I of Persia ordered the construction of the Xerxes Canal through the base of Mount Athos peninsula, Chalkidiki , northern Greece. It was constructed as part of his preparations for the Second Persian invasion of Greece , a part of the Greco-Persian Wars . It is one of the few monuments left by
SECTION 20
#17327655764561496-562: Is sited on the south side of the bridges on the east bank. One of the last regular commercial uses of the canal was the tanker Esso Jersey , which served the Esso oil terminal. The ship was known as the Kieler from 1977, and was scrapped in 1984. It was the largest ship to use the canal, and delivered a final load of 244 tons of petrol in July 1971. Commercial traffic ceased after a coaster unloaded
1564-418: Is steeper than the desired canal gradient. They are constructed so the falling water's kinetic energy is dissipated in order to prevent it from scouring the bed and sides of the canal. A canal fall is constructed by cut and fill . It may be combined with a regulator, bridge, or other structure to save costs. There are various types of canal falls, based on their shape. One type is the ogee fall, where
1632-452: Is the pound lock , which consists of a chamber within which the water level can be raised or lowered connecting either two pieces of canal at a different level or the canal with a river or the sea. When there is a hill to be climbed, flights of many locks in short succession may be used. Prior to the development of the pound lock in 984 AD in China by Chhaio Wei-Yo and later in Europe in
1700-598: The Elbe , Oder and Weser being linked by canals. In post-Roman Britain, the first early modern period canal built appears to have been the Exeter Canal , which was surveyed in 1563, and open in 1566. The oldest canal in the European settlements of North America, technically a mill race built for industrial purposes, is Mother Brook between the Boston, Massachusetts neighbourhoods of Dedham and Hyde Park connecting
1768-543: The Naviglio Grande built between 1127 and 1257 to connect Milan with the river Ticino . The Naviglio Grande is the most important of the lombard " navigli " and the oldest functioning canal in Europe. Later, canals were built in the Netherlands and Flanders to drain the polders and assist transportation of goods and people. Canal building was revived in this age because of commercial expansion from
1836-545: The Phoenix metropolitan area was the most complex in ancient North America. A portion of the ancient canals has been renovated for the Salt River Project and now helps to supply the city's water. The Sinhalese constructed the 87 km (54 mi) Yodha Ela in 459 A.D. as a part of their extensive irrigation network which functioned in a way of a moving reservoir due to its single banking aspect to manage
1904-528: The River Brue at Northover with Glastonbury Abbey , a distance of about 1.75 kilometres (1,900 yd). Its initial purpose is believed to be the transport of building stone for the abbey, but later it was used for delivering produce, including grain, wine and fish, from the abbey's outlying properties. It remained in use until at least the 14th century, but possibly as late as the mid-16th century. More lasting and of more economic impact were canals like
1972-614: The Songhai Empire of West Africa, several canals were constructed under Sunni Ali and Askia Muhammad I between Kabara and Timbuktu in the 15th century. These were used primarily for irrigation and transport. Sunni Ali also attempted to construct a canal from the Niger River to Walata to facilitate conquest of the city but his progress was halted when he went to war with the Mossi Kingdoms . Around 1500–1800
2040-556: The reservoirs built at Girnar in 3000 BC. This is the first time that such planned civil project had taken place in the ancient world. In Egypt , canals date back at least to the time of Pepi I Meryre (reigned 2332–2283 BC), who ordered a canal built to bypass the cataract on the Nile near Aswan . In ancient China , large canals for river transport were established as far back as the Spring and Autumn period (8th–5th centuries BC),
2108-404: The stratum the canal passes through, it may be necessary to line the cut with some form of watertight material such as clay or concrete. When this is done with clay, it is known as puddling . Canals need to be level, and while small irregularities in the lie of the land can be dealt with through cuttings and embankments, for larger deviations other approaches have been adopted. The most common
Exeter Ship Canal - Misplaced Pages Continue
2176-471: The 12th century. River navigations were improved progressively by the use of single, or flash locks . Taking boats through these used large amounts of water leading to conflicts with watermill owners and to correct this, the pound or chamber lock first appeared, in the 10th century in China and in Europe in 1373 in Vreeswijk , Netherlands. Another important development was the mitre gate , which was, it
2244-472: The 15th century, either flash locks consisting of a single gate were used or ramps, sometimes equipped with rollers, were used to change the level. Flash locks were only practical where there was plenty of water available. Locks use a lot of water, so builders have adopted other approaches for situations where little water is available. These include boat lifts , such as the Falkirk Wheel , which use
2312-544: The Friends group have been campaigning for the new bridges to be built with increased headroom. There is a possibility that this could be funded by the government's Major Road Network scheme. Development plans were given a boost in 2021, when Exeter Ship Canal and Basin became the United Kingdom's fourth Heritage Harbour, an award given by the Maritime Heritage Trust and National Historic Ships UK. Increasing
2380-651: The Littlehampston treatment works, which serves about 162,000 people in the Torbay area of Devon, has on four separate occasions been contaminated by the dangerous cryptosporidium parasite, most recently in May 2024. In July 1988 the water supply to Camelford , served by the Lowermoor treatment works, was severely contaminated by aluminium sulphate . Many people had medical issues after this and some died. SWW
2448-590: The Persian Empire in Europe . Greek engineers were also among the first to use canal locks , by which they regulated the water flow in the Ancient Suez Canal as early as the 3rd century BC. There was little experience moving bulk loads by carts, while a pack-horse would [i.e. 'could'] carry only an eighth of a ton. On a soft road a horse might be able to draw 5/8ths of a ton. But if
2516-785: The Southwest by 1300 CE. Archaeologists working at a major archaeological dig in the 1990s in the Tucson Basin, along the Santa Cruz River, identified a culture and people that may have been the ancestors of the Hohokam. This prehistoric group occupied southern Arizona as early as 2000 BCE, and in the Early Agricultural period grew corn, lived year-round in sedentary villages, and developed sophisticated irrigation canals. The large-scale Hohokam irrigation network in
2584-627: The air draft of the bridges to 13 feet (4.0 m) would enable many more coastal boats to use the harbour, including those catching fish and shellfish. 50°39′55″N 3°28′04″W / 50.6653°N 3.4678°W / 50.6653; -3.4678 Canal Canals or artificial waterways are waterways or engineered channels built for drainage management (e.g. flood control and irrigation ) or for conveyancing water transport vehicles (e.g. water taxi ). They carry free, calm surface flow under atmospheric pressure , and can be thought of as artificial rivers . In most cases,
2652-448: The bridges is only carried out infrequently, because of the disruption it causes to traffic on the A38, and each opening costs around £800 in administrative and staffing costs. The council and a support group, the Friends of Exeter Ship Canal, are looking at ways this could be overcome. The Countess Weir swing bridge dates from 1936, while the lifting bridge was added in 1972, when the A38 was
2720-436: The canal pressure with the influx of water. It was also designed as an elongated reservoir passing through traps creating 66 mini catchments as it flows from Kala Wewa to Thissa Wawa . The canal was not designed for the quick conveying of water from Kala Wewa to Thissa Wawa but to create a mass of water between the two reservoirs, which would in turn provided for agriculture and the use of humans and animals. They also achieved
2788-418: The canal to form a dam. They are generally placed in pre-existing grooves in the canal bank. On more modern canals, "guard locks" or gates were sometimes placed to allow a section of the canal to be quickly closed off, either for maintenance, or to prevent a major loss of water due to a canal breach. A canal fall , or canal drop, is a vertical drop in the canal bed. These are built when the natural ground slope
Exeter Ship Canal - Misplaced Pages Continue
2856-408: The canal was extended and the entrance was moved downstream to Topsham. In 1701 the canal was deepened and widened to allow the passage of ocean-going ships. At the same time the number of locks on the canal was reduced to one. Floodgates were also fitted to the canal entrance. These improvements led to the canal being highly successful until demand for access declined with the end of the wool trade in
2924-411: The canal was too small to attract the sizeable ocean-going vessels and the canal was taken over by its creditors for sixteen years. Use of the canal has declined gradually ever since. In 1939 the canal was still carrying some 63,000 tons of material annually, and after the war it was still seen as a useful means of transporting goods to and from its basin at Haven Banks, opposite Exeter Quay. Planning for
2992-462: The canal. Where large amounts of goods are loaded or unloaded such as at the end of a canal, a canal basin may be built. This would normally be a section of water wider than the general canal. In some cases, the canal basins contain wharfs and cranes to assist with movement of goods. When a section of the canal needs to be sealed off so it can be drained for maintenance stop planks are frequently used. These consist of planks of wood placed across
3060-538: The canal. In the 1970s, the basin provided the backdrop for the filming of quayside activity in the historical drama The Onedin Line , even though the series was supposed to be set in Liverpool. In 2002 the future of the canal looked brighter when the city basin was included in a £24 million redevelopment scheme by Exeter Quay Developments, a consortium led by the construction company McAlpine . The quay area retains
3128-469: The channel. There are two broad types of canal: Historically, canals were of immense importance to commerce and the development, growth and vitality of a civilization. In 1855 the Lehigh Canal carried over 1.2 million tons of anthracite coal; by the 1930s the company which built and operated it for over a century ceased operation. The few canals still in operation in our modern age are a fraction of
3196-704: The city after The Blitz recommended that Turf Lock, the canal's junction with the estuary be deepened and enlarged to allow ships of 600 tons to pass. In May 1944 the Countess Weir Road bridge (present day A379) was used in rehearsals for the D-Day attack on the 'Canal de Caen' ( Pegasus Bridge ) and the River Orne ( Horsa Bridge ), by the Second Battalion Oxfordshire and Buckinghamshire Light Infantry . A plaque acknowledging this
3264-399: The drop follows an s-shaped curve to create a smooth transition and reduce turbulence . However, this smooth transition does not dissipate the water's kinetic energy, which leads to heavy scouring. As a result, the canal needs to be reinforced with concrete or masonry to protect it from eroding. Another type of canal fall is the vertical fall, which is "simple and economical". These feature
3332-612: The early 19th century and later with the rise of the railways. There were many notable failures to connect Exeter and the South West to the national canal and rail networks: The Grand Western Canal linking Exeter to Bristol (1796) was never completed; the Bristol & Exeter Railway link to the canal basin was postponed in 1832 and 1844; the South Devon Railway ran services to the canal from 1867, but by this time
3400-670: The first summit level canal to use pound locks in Europe was the Briare Canal connecting the Loire and Seine (1642), followed by the more ambitious Canal du Midi (1683) connecting the Atlantic to the Mediterranean. This included a staircase of 8 locks at Béziers , a 157 metres (515 ft) tunnel, and three major aqueducts. Canal building progressed steadily in Germany in the 17th and 18th centuries with three great rivers,
3468-462: The freedom to make deliveries well away from rail lined road beds or ditches in the dirt which could not operate in the winter. The longest extant canal today, the Grand Canal in northern China, still remains in heavy use, especially the portion south of the Yellow River . It stretches from Beijing to Hangzhou at 1,794 kilometres (1,115 miles). Canals are built in one of three ways, or
SECTION 50
#17327655764563536-717: The higher waters of the Charles River and the mouth of the Neponset River and the sea. It was constructed in 1639 to provide water power for mills. In Russia, the Volga–Baltic Waterway , a nationwide canal system connecting the Baltic Sea and Caspian Sea via the Neva and Volga rivers, was opened in 1718. South West Water South West Water is a British private utility company responsible for
3604-549: The load were carried by a barge on a waterway, then up to 30 tons could be drawn by the same horse. — technology historian Ronald W. Clark referring to transport realities before the industrial revolution and the Canal age . Hohokam was a society in the North American Southwest in what is now part of Arizona , United States, and Sonora , Mexico. Their irrigation systems supported the largest population in
3672-480: The longest canal in the world today and the oldest extant one. It is 1,794 kilometres (1,115 mi) long and was built to carry the Emperor Yang Guang between Zhuodu ( Beijing ) and Yuhang ( Hangzhou ). The project began in 605 and was completed in 609, although much of the work combined older canals, the oldest section of the canal existing since at least 486 BC. Even in its narrowest urban sections it
3740-534: The longest one of that period being the Hong Gou (Canal of the Wild Geese), which according to the ancient historian Sima Qian connected the old states of Song, Zhang, Chen, Cai, Cao, and Wei. The Caoyun System of canals was essential for imperial taxation, which was largely assessed in kind and involved enormous shipments of rice and other grains. By far the longest canal was the Grand Canal of China , still
3808-539: The main route to the West Country, prior to the building of the M5 motorway viaduct in 1977. Options being considered are to replace the two bridges with a single swing bridge or lift bridge , building a new bridge at a higher level to give much more clearance, and the construction of a drop lock, to lower the level of the waterway beneath the bridges. Both bridges were nearing the end of their operational life in 2019, and
3876-456: The newly constructed M5 motorway bridge. Ownership of the treatment works and the vessel passed to South West Water when the water industry was privatised in 1989, and dumping of sludge at sea ceased on 31 December 1998. The ship made a ceremonial visit to the canal in January 1999, after which it was sold. The fall of commercial traffic in the 1960s coincided with the rise of leisure use of
3944-506: The numbers that once fueled and enabled economic growth, indeed were practically a prerequisite to further urbanization and industrialization. For the movement of bulk raw materials such as coal and ores are difficult and marginally affordable without water transport. Such raw materials fueled the industrial developments and new metallurgy resulting of the spiral of increasing mechanization during 17th–20th century, leading to new research disciplines, new industries and economies of scale, raising
4012-604: The pre-railroad days of the industrial revolution, water transport was the gold standard of fast transportation. The first artificial canal in Western Europe was the Fossa Carolina built at the end of the 8th century under personal supervision of Charlemagne . In Britain, the Glastonbury Canal is believed to be the first post-Roman canal and was built in the middle of the 10th century to link
4080-480: The standard of living for any industrialized society. Most ship canals today primarily service bulk cargo and large ship transportation industries, whereas the once critical smaller inland waterways conceived and engineered as boat and barge canals have largely been supplanted and filled in, abandoned and left to deteriorate, or kept in service and staffed by state employees, where dams and locks are maintained for flood control or pleasure boating. Their replacement
4148-573: The valley of the River Dee . Another option for dealing with hills is to tunnel through them. An example of this approach is the Harecastle Tunnel on the Trent and Mersey Canal . Tunnels are only practical for smaller canals. Some canals attempted to keep changes in level down to a minimum. These canals known as contour canals would take longer, winding routes, along which the land was
SECTION 60
#17327655764564216-446: The water supply and waste water treatment services throughout Devon and Cornwall and in small areas of Dorset and Somerset . South West Water was created in 1989 with the privatisation of the water industry. It was preceded by the South West Water Authority which was formed by the Water Act 1973 as one of ten regional water authorities formed by a merger of various statutory and local authority water undertakings. South West Water
4284-445: The year the Butts Ferry , a small hand powered passenger ferry, operates across the river by Exeter quay and canal basin during the day, though there is a footbridge close at hand. A ferry has been operating here since at least 1641. The canal is owned by Exeter City Council. In 2017, they announced that it runs at a deficit, losing around £110,000 per year. They began negotiations with the Canal and River Trust in September 2016, with
4352-466: Was also expensive, as men expect compensation in the form of wages, room and board. This was because long-haul roads were unpaved, more often than not too narrow for carts, much less wagons, and in poor condition, wending their way through forests, marshy or muddy quagmires as often as unimproved but dry footing. In that era, as today, greater cargoes, especially bulk goods and raw materials , could be transported by ship far more economically than by land; in
4420-458: Was an option in some cases, sometimes supplemented by other methods to deal with seasonal variations in flow. Where such sources were unavailable, reservoirs – either separate from the canal or built into its course – and back pumping were used to provide the required water. In other cases, water pumped from mines was used to feed the canal. In certain cases, extensive "feeder canals" were built to bring water from sources located far from
4488-407: Was gradual, beginning first in the United States in the mid-1850s where canal shipping was first augmented by, then began being replaced by using much faster , less geographically constrained & limited, and generally cheaper to maintain railways . By the early 1880s, canals which had little ability to economically compete with rail transport, were off the map. In the next couple of decades, coal
4556-424: Was increasingly diminished as the heating fuel of choice by oil, and growth of coal shipments leveled off. Later, after World War I when motor-trucks came into their own, the last small U.S. barge canals saw a steady decline in cargo ton-miles alongside many railways, the flexibility and steep slope climbing capability of lorries taking over cargo hauling increasingly as road networks were improved, and which also had
4624-426: Was once used to describe linear features seen on the surface of Mars , Martian canals , an optical illusion. A navigation is a series of channels that run roughly parallel to the valley and stream bed of an unimproved river. A navigation always shares the drainage basin of the river. A vessel uses the calm parts of the river itself as well as improvements, traversing the same changes in height. A true canal
#455544