102-677: The Saltash Ferry was a ferry across the River Tamar between Saltash , Cornwall and Plymouth , Devon . It was replaced in 1961 by the Tamar Bridge . There had been a ferry service across this section of the Tamar since the time of the Norman Conquest . At the time, there was no public crossing of the Tamar downstream of Gunnislake , 8 miles (13 km) to the north. Initial ferries were powered by oar and ropes. The service
204-735: A UNESCO World Heritage Site as part of the Cornwall and West Devon Mining Landscape . In November 2013, South West Water was fined £50,000 after it admitted permitting the discharge of sewage from its Camels Head treatment plant into a tributary of the River Tamar for eight years. Together, the Tamar, Tavy and Lynher form the Tamar Valley National Landscape, a designated Area of Outstanding Natural Beauty . The Tamar Valley Area of Outstanding Natural Beauty covers around 195 km (75 sq mi) around
306-478: A floating bridge steam ferry across the Tamar. It was constructed by James Meadows Rendel the following year, and could accommodate up to four horse carriages. The service was unreliable and withdrawn a year later. It was revived by the Saltash Corporation in 1850, with a second boat launched the following year. In 1892, service time was improved to 20 minutes. A new ferry was ordered in 1933, which
408-470: A Roman settlement named Tamaris, but it is unclear to which of those towns along the Tamar this refers. Plymouth , Launceston and the Roman fort at Calstock have been variously suggested. The river (and/or land on its banks) is designated as a Site of Special Scientific Interest (SSSI), a European Special Area of Conservation, and an Area of Outstanding Natural Beauty. A part of it is also designated as
510-498: A canal from there. The project however advanced no further than Gunnislake , with work ceasing in 1808. Barges of up to 30 tons could then proceed as far as Gunnislake New Bridge, bypassing the weir (above Weir Head) via a 500-yard canal to the west of the river. As the only completed work of the original project, this short canal became known as the Tamar Manure (Navigation) Canal. It had one lock allowing vessels to rise from
612-458: A ditch. From here a pipe carries the water under the highway and the infant river Tamar is on its way to the sea at Plymouth." The Upper Tamar Lake and Lower Tamar Lake are two small reservoirs on the Tamar's upper course. The Lower Lake was constructed in the 1820s to feed the Bude Canal ; it is now a nature reserve. The Upper Lake was constructed in the 1970s and supplies fresh water to
714-463: A line running at the centre of the river — where the river is tidal, it is the centre of the low water channel. This "centre of river" arrangement ends just upstream of the Tamar Bridge at Saltash , downstream of which the counties officially extend only to their respective (tidal) bank's low water mark. The river is dammed at two points of its upper course, forming two reservoirs in place of
816-561: A network of creeks. Lying below sea level, it is prone to flooding at exceptional tides, but has nevertheless been inhabited since Roman times. The usually quoted source of the Thames is at Thames Head (at grid reference ST980994 ). This is about 1.5 mi (2.4 km) north of the village of Kemble in southern Gloucestershire , near the town of Cirencester , in the Cotswolds . However, Seven Springs near Cheltenham , where
918-570: A plaque near the old ferry terminal. The plaque is mounted on material salvaged from buildings in Plymouth destroyed during the Blitz . The final crossing of the ferry was at 11:15pm on 23 October 1961. The Tamar Bridge opened for service the following morning. 50°24′25″N 4°12′14″W / 50.407°N 4.204°W / 50.407; -4.204 River Tamar The Tamar ( / ˈ t eɪ m ɑːr / ; Cornish : Dowr Tamar )
1020-614: A rail connection from Plymouth to London was opened, and fresh produce could be landed at the Devonport steamer quays in the evening and be on sale in London by the next morning. The growing city population created a large demand for sightseeing cruises on the river; this was a significant source of traffic from 1823, with the launch of the Cornish steam packet Sir Francis Drake , until the outbreak of World War II . Mineral traffic on
1122-570: A spell on Tamara, turning her into a bubbling spring, which produced the Tamar river and flowed all the way to the sea. Tawradge awoke to find his beloved had become a river; in despair, he sought the advice of a magician, who turned him into a river (the River Torridge and the River Taw ) so that he could hope to reunite with Tamara. Tawradge was never able to find and merge with his beloved Tamara, instead turning north toward Bideford and
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#17327797587751224-586: A summer venue for organised swimming, which is prohibited on safety grounds in a stretch centred on Central London . After the river took its present-day course, many of the banks of the Thames Estuary and the Thames Valley in London were partly covered in marshland , as was the adjoining Lower Lea Valley . Streams and rivers like the River Lea , Tyburn Brook and Bollo Brook drained into
1326-558: A waste product but later offering an important source of revenue as copper and tin extraction declined in profitability. The refined product was exported worldwide, in particular to the southern United States, where it was used as an insecticide in the cotton fields. In the 13th century lead and silver output from the royal mines on the Bere peninsula (between the Tamar and the Tavy ) was significant, and production continued intermittently until
1428-506: Is a river in south west England that forms most of the border between Devon (to the east) and Cornwall (to the west). A large part of the valley of the Tamar is protected as the Tamar Valley National Landscape (an Area of Outstanding Natural Beauty ), and some is included in the Cornwall and West Devon Mining Landscape (a World Heritage Site ) due to its historic mining activities. The Tamar's source
1530-608: Is a weir just downstream of the village of Gunnislake . Waterborne traffic through the Hamoaze is controlled by the Queen's Harbour Master for Plymouth, who is responsible for managing navigation along the entire tidal Tamar. The Royal Navy has one of its three main naval bases at Devonport , situated on the Hamoaze, upstream of which the river is now used largely by recreational craft. Excursions operate (April to October only) on
1632-471: Is a landmark on the Boat Race course, while Glover's Island forms the centre of a view from Richmond Hill . Islands of historical interest include Magna Carta Island at Runnymede , Fry's Island at Reading, and Pharaoh's Island near Shepperton. In more recent times Platts Eyot at Hampton was the place where Motor Torpedo Boats (MTB)s were built, Tagg's Island near Molesey was associated with
1734-402: Is an important water source, especially in the drier months, so maintaining its quality and quantity is extremely important. Groundwater is vulnerable to surface pollution, especially in highly urbanised areas. Brooks, canals and rivers, within an area of 3,842 sq mi (9,951 km ), combine to form 38 main tributaries feeding the Thames between its source and Teddington Lock . This
1836-474: Is another notable structure on the Tamar, being 120 feet (37 m) high with twelve 60-foot (18 m) wide arches, of which three of the piers stand in the river, and was built between 1904 and 1907. The total length of the tidal river (which, like other tidal waters in England, has public right of navigation) is 19.2 miles (30.9 km). The normal tidal limit (noted on Ordnance Survey maps as 'NTL')
1938-408: Is at Horsebridge (1437), and the next oldest is Greystone Bridge near Lawhitton — this arched stone bridge was built in 1439. Gunnislake New Bridge was built in 1520 by Sir Piers Edgcumbe, the owner of Cotehele and Mount Edgcumbe. The Gunnislake bridge was a main route into south east Cornwall and the lowest bridge over the Tamar until the Tamar Bridge at Saltash was opened in 1962. The lower Tamar
2040-649: Is believed that Tamesubugus' name was derived from that of the river. Tamese was referred to as a place, not a river in the Ravenna Cosmography ( c. AD 700 ). The river's name has always been pronounced with a simple t /t/ ; the Middle English spelling was typically Temese and the Brittonic form Tamesis . A similar spelling from 1210, "Tamisiam" (the accusative case of "Tamisia"; see Kingston upon Thames § Early history ),
2142-572: Is derived from the Brittonic name for the river, Tamesas (from * tamēssa ), recorded in Latin as Tamesis and yielding modern Welsh Tafwys "Thames". The name element Tam may have meant "dark" and can be compared to other cognates such as Russian темно ( Proto-Slavic * tĭmĭnŭ ), Lithuanian tamsi "dark", Latvian tumsa "darkness", Sanskrit tamas and Welsh tywyll "darkness" and Middle Irish teimen "dark grey". The origin
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#17327797587752244-511: Is fed by at least 50 named tributaries . The river contains over 80 islands . With its waters varying from freshwater to almost seawater, the Thames supports a variety of wildlife and has a number of adjoining Sites of Special Scientific Interest , with the largest being in the North Kent Marshes and covering 20.4 sq mi (5,289 ha). According to Mallory and Adams, the Thames, from Middle English Temese ,
2346-604: Is formed for much of its length for shipping and supplies: through the Port of London for international trade, internally along its length and by its connection to the British canal system. The river's position has put it at the centre of many events in British history, leading to it being described by John Burns as "liquid history". Two broad canals link the river to other rivers: the Kennet and Avon Canal ( Reading to Bath ) and
2448-697: Is found in Magna Carta . The Thames through Oxford is sometimes called the Isis . Historically, and especially in Victorian times, gazetteers and cartographers insisted that the entire river was correctly named the Isis from its source down to Dorchester on Thames and that only from this point, where the river meets the Thame and becomes the "Thame-isis" (supposedly subsequently abbreviated to Thames) should it be so called. Ordnance Survey maps still label
2550-479: Is less than 6 km (3.7 mi) from the north Cornish coast, but it flows southward across the peninsula to the south coast. The total length of the river is 61 miles (98 km). At its mouth, the Tamar flows into the Hamoaze before entering Plymouth Sound , a bay in the English Channel . Tributaries of the river include the rivers Inny , Ottery , Kensey and Lynher (or St Germans River ) on
2652-452: Is responsible for managing the flow of water to help prevent and mitigate flooding, and providing for navigation: the volume and speed of water downstream is managed by adjusting the sluices at each of the weirs and, at peak high water, levels are generally dissipated over preferred flood plains adjacent to the river. Occasionally, flooding of inhabited areas is unavoidable and the agency issues flood warnings. Due to stiff penalties applicable on
2754-839: Is shared by many other river names in Britain, such as the River Tamar at the border of Devon and Cornwall , several rivers named Tame in the Midlands and North Yorkshire , the Tavy on Dartmoor , the Team of the North East, the Teifi and Teme of Wales , the Teviot in the Scottish Borders and a Thames tributary, the Thame . Kenneth H. Jackson proposed that the name of
2856-629: Is spanned also by the Royal Albert Bridge (built 1859), a rail bridge now adjacent to the newer Tamar Bridge. Both of these bridges are between Saltash (known as the 'Gateway to Cornwall') and Plymouth. Further downstream, crossing the Hamoaze , is the Torpoint Ferry — a chain ferry connecting Torpoint to Devonport — and at the most downstream part of the Hamoaze there is also the Cremyll Ferry . The Calstock Viaduct
2958-727: Is the final place to turn boats; it was from here that smaller craft could begin their journey on the Tamar Manure Canal . In 1794 the Tamar Manure Navigation Company was formed to extend navigation inland for a further 30 miles, to Tamerton Bridge in North Tamerton . An Act of Parliament of 1796 authorised the works, with the company empowered to improve and manage navigation on the Tamar from Morwellham Quay upstream to Boat Pool, at Blanchdown (just upstream of Gunnislake), and to construct
3060-404: Is the usual tidal limit ; however, high spring tides can raise the head water level in the reach above Teddington and can occasionally reverse the river flow for a short time. In these circumstances, tidal effects can be observed upstream to the next lock beside Molesey weir , which is visible from the towpath and bridge beside Hampton Court Palace . Before Teddington Lock was built in 1810–12,
3162-461: The Baltic , in large baulks for use as pit props in the mines, and coal from Wales to supply the mine pumping engines. Tavistock was one of the three stannary towns of Devon, and large quantities of refined tin ore were exported through Morwellham from the 12th century until 1838, when the requirement to pay duty on the metal at one of the specified towns was relaxed. The opening in 1817 of
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3264-811: The Berwyn Mountains in North Wales . About 450,000 years ago, in the most extreme Ice Age of the Pleistocene , the Anglian , the furthest southern extent of the ice sheet reached Hornchurch in east London, the Vale of St Albans, and the Finchley Gap . It dammed the river in Hertfordshire , resulting in the formation of large ice lakes, which eventually burst their banks and caused
3366-597: The Bristol Channel and is still said to mourn his love, the Tamar. This legend explains why the River Torridge, which rises only 500 metres from the Tamar, veers away from the Tamar and forms a huge arc, eventually flowing to the North Devon coast. The other giant, Tavy, also awoke in despair and sought the aid of his own father, also a powerful magician. His father turned Tavy into a river as well, and
3468-541: The British Geological Survey from the banks of the tidal River Thames contain geochemical information and fossils which provide a 10,000-year record of sea-level change. Combined, this and other studies suggest that the Thames sea-level has risen more than 30 m during the Holocene at a rate of around 5–6 mm per year from 10,000 to 6,000 years ago. The rise of sea level dramatically reduced when
3570-512: The Bude area, as well as having some recreational use. The east bank of the Tamar was fixed as the border of Cornwall by King Athelstan in the year 936. Several villages north of Launceston , to the west of the Tamar, were transferred to Devon at some point in the eleventh century when the border was changed to follow the River Ottery westward, rather than the Tamar. The county boundary
3672-518: The Churn (which feeds into the Thames near Cricklade ) rises, is also sometimes quoted as the Thames' source, as this location is farthest from the mouth and adds some 14 mi (23 km) to the river's length. At Seven Springs above the source is a stone with the Latin hexameter inscription "Hic tuus o Tamesine pater septemgeminus fons", which means "Here, O Father Thames, [is] your sevenfold source". The springs at Seven Springs flow throughout
3774-684: The Grand Union Canal (London to the Midlands). The Grand Union effectively bypassed the earlier, narrow and winding Oxford Canal which remains open as a popular scenic recreational route. Three further cross-basin canals are disused but are in various stages of reconstruction: the Thames and Severn Canal (via Stroud ), which operated until 1927 (to the west coast of England), the Wey and Arun Canal to Littlehampton , which operated until 1871 (to
3876-489: The River Lea can be considered another boundary. Most of the local riverside was also marshland. The land was drained and became farmland; it was built on after the Industrial Revolution . Canvey Island in southern Essex (area 18.45 km , 7.12 sq mi; population 40,000 ) was once marshy, but is now a fully reclaimed island in the Thames estuary, separated from the mainland of south Essex by
3978-662: The Royal Academy , London , in 1785. They are now on show at the River and Rowing Museum in Henley). Richard Coates suggests that while the river was as a whole called the Thames, part of it, where it was too wide to ford, was called * (p)lowonida . This gave the name to a settlement on its banks, which became known as Londinium , from the Indo-European roots * pleu- "flow" and * -nedi "river" meaning something like
4080-616: The Tavistock Canal , between Tavistock and Morwellham, facilitated traffic. Later, the East Cornwall Mineral Railway provided an outlet through the quays of Calstock from the Cornish side of the valley. Other significant cargoes exported were quarried granite, and later, copper, lead and manganese ores, with their important by-product of arsenic . Arsenic was extracted from mispickel , once regarded as
4182-482: The Tavy set off in search of the Tamar, eventually finding her and merging with her into a wide and beautiful estuary . River Thames#Etymology The River Thames ( / t ɛ m z / TEMZ ), known alternatively in parts as the River Isis , is a river that flows through southern England including London . At 215 miles (346 km), it is the longest river entirely in England and
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4284-504: The Thames Barrier , which protects central London from flooding by storm surges . Below the barrier, the river passes Woolwich , Thamesmead , Dagenham , Erith , Purfleet , Dartford , West Thurrock , Northfleet , Tilbury and Gravesend before entering the Thames Estuary near Southend-on-Sea . The sea level in the Thames estuary is rising and the rate of rise is increasing. Sediment cores up to 10 m deep collected by
4386-605: The Thanetian stage of the late Palaeocene epoch. Until around 500,000 years ago, the Thames flowed on its existing course through what is now Oxfordshire , before turning to the north-east through Hertfordshire and East Anglia and reaching the North Sea near present-day Ipswich . At this time the river-system headwaters lay in the English West Midlands and may, at times, have received drainage from
4488-413: The estuary narrows into the tidal river, some 8.4 miles (13.5 km) upstream from Plymouth Sound. Vessels of 300 tons sailed as far inland as Morwellham, 17.2 miles (27.7 km) along the river from the sea. A further stretch of 1.8 miles (2.9 km) upstream to Weir Head, near Gunnislake, is accessible to smaller boats. Weir Head is just downstream of the weir at Gunnislake (the tidal limit) and
4590-673: The second-longest in the United Kingdom , after the River Severn . The river rises at Thames Head in Gloucestershire and flows into the North Sea near Tilbury , Essex and Gravesend , Kent, via the Thames Estuary . From the west, it flows through Oxford (where it is sometimes called the Isis), Reading , Henley-on-Thames and Windsor . The Thames also drains the whole of Greater London . The lower reaches of
4692-675: The stannary town of Tavistock was added to the World Heritage List during the 30th Session of the UNESCO World Heritage Committee in Vilnius, July 2006. The Environment Agency measures the water quality of the river systems in England. Each is given an overall ecological status, which may be one of five levels: high, good, moderate, poor and bad. There are several components that are used to determine this, including biological status, which looks at
4794-411: The " Three Towns " (Plymouth, Devonport and Stonehouse ) at the mouth of the river offered an important market for the valley's agricultural produce, needed in particular to serve the victualling requirements of the royal dockyard , and this was always carried by boat. In 1820 or 1821 the first paddle steamer on the Tamar inaugurated a service between Calstock and Devonport to deliver foodstuffs. In 1859
4896-427: The 19th century. The Johnson Matthey smelting works at Weir Quay extracted silver and lead not only from local ore, but also from ore imported by sea from Europe and from as far away as Newfoundland . Fluorspar from the lead mine tailings was exported to France for use in the manufacture of glassware. The old ferry crossings developed into the busy river quays of the 18th and 19th centuries. The development of
4998-464: The Cornish side and the Deer and Tavy on the Devon side. The name Tamar (or Tamare) was mentioned by Ptolemy in the 2nd century AD in his Geography . The name is said to mean "great water". The Tamar is one of several British rivers whose ancient name is assumed by some to be derived from a prehistoric river word apparently meaning "dark flowing" and which it shares with the River Thames . The seventh-century Ravenna Cosmography mentions
5100-411: The North Sea, and the Thames Barrier was built in the 1980s to protect London from this risk. The Nore is the sandbank that marks the mouth of the Thames Estuary , where the outflow from the Thames meets the North Sea . It is roughly halfway between Havengore Creek in Essex and Warden Point on the Isle of Sheppey in Kent. Until 1964 it marked the seaward limit of the Port of London Authority. As
5202-489: The River Thames on the Tideway include the rivers Crane , Brent , Wandle , Ravensbourne (the final part of which is called Deptford Creek ), Lea (the final part of which is called Bow Creek ), Roding (Barking Creek), Darent and Ingrebourne . In London, the water is slightly brackish with sea salt, being a mix of sea and fresh water. This part of the river is managed by the Port of London Authority . The flood threat here comes from high tides and strong winds from
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#17327797587755304-401: The Severn has a discharge almost twice as large on average despite having a smaller drainage basin . In Scotland , the Tay achieves more than double the Thames' average discharge from a drainage basin that is 60% smaller. Along its course are 45 navigation locks with accompanying weirs . Its catchment area covers a large part of south-eastern and a small part of western England; the river
5406-513: The Tamar Estuary Nature Reserve, owned by the Cornwall Wildlife Trust . The site was designated in 1991 for its biodiversity and varying habitats that support a large number of wader and wildfowl species, as well as the special interest of its marine biology. The site supports a nationally important wintering population of avocet and supports species such as black-tailed godwit , Eurasian whimbrel , greenshank , spotted redshank , green sandpiper and golden plover . Throughout human history
5508-414: The Tamar are very unusual and support species such as the hydroid Cordylophora caspia . The Tamar is one of a few estuaries where zonation of rocky habitats (intertidal and subtidal) can be observed along an estuarine gradient. The Tamar–Tavy Estuary is a Site of Special Scientific Interest (SSSI) covering the tidal estuaries of the River Tamar and the River Tavy . Part of the Tamar estuary also forms
5610-424: The Tamar crossings. In medieval times the transport of goods to supply the Benedictine abbey at Tavistock , four miles by track from the river port of Morwellham, was significant. Sea sand from the coast was imported to spread on farmland, until in the 18th century a dressing of lime was found to be more beneficial. Large quantities of limestone and coal were then imported to burn in the numerous limekilns on
5712-463: The Tamar was an important river for shipping copper from ports such as Morwellham Quay , Calstock and New Quay (Devon) to south Wales where it would be smelted. The valley forms district A10i of the Cornwall and West Devon Mining Landscape . The river has long been famous for the quality of its salmon whilst the valley was known nationally for the high quality, and early, soft fruit and market gardens sheltered by its steeply winding slopes. There
5814-484: The Tavy river as far as Lydford , and burned Ordwulf 's monastery at Tavistock . During the English Civil War , Cornwall was entirely loyal to King Charles I and the Royalist cause. However, Devon was primarily Parliamentarian ; thus the River Tamar became the site of many battles, such as the Battle of Gunnislake New Bridge on 20 July 1664. Each side of the Tamar understood that if they were either to invade or to defend themselves, they had to have control of
5916-416: The Thames Estuary), the river is subject to tidal activity from the North Sea . Before the lock was installed, the river was tidal as far as Staines, about 16 mi (26 km) upstream. London, capital of Roman Britain , was established on two hills, now known as Cornhill and Ludgate Hill . These provided a firm base for a trading centre at the lowest possible point on the Thames. A river crossing
6018-470: The Thames as "River Thames or Isis" down to Dorchester. Since the early 20th century this distinction has been lost in common usage outside of Oxford, and some historians suggest the name Isis is nothing more than a truncation of Tamesis , the Latin name for the Thames. Sculptures titled Tamesis and Isis by Anne Seymour Damer are located on the bridge at Henley-on-Thames , Oxfordshire (the original terracotta and plaster models were exhibited at
6120-439: The Thames is not Indo-European (and of unknown meaning), while Peter Kitson suggested that it is Indo-European but originated before the Britons and has a name indicating "muddiness" from a root *tā- , 'melt'. Early variants of the name include: Indirect evidence for the antiquity of the name "Thames" is provided by a Roman potsherd found at Oxford, bearing the inscription Tamesubugus fecit (Tamesubugus made [this]). It
6222-453: The banks of the river. A traditional Cornish tale claims that the devil would never dare to cross the River Tamar into Cornwall for fear of ending up as a pasty filling. Though unusual landscape features are often named after the devil (e.g. devil's frying pan) it used to be said that the devil never came to Cornwall: he once reached Torpoint and immediately noticed that various kinds of pie were customary; he feared that devilly pie might be
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#17327797587756324-422: The border follows the river (from source to sea) currently exist, all of which are upstream of the confluence of the River Deer , in the upper course of the Tamar. Part of the Cornish civil parish of North Tamerton extends east across the river, whilst parts of the Devon civil parishes of Bridgerule and Pancrasweek extend west across the Tamar. Where the border does follow the Tamar, it is defined as being along
6426-423: The case of the Colne ), and man-made distributaries such as the Longford River . Three canals intersect this stretch: the Oxford Canal , Kennet and Avon Canal and Wey Navigation . Its longest artificial secondary channel (cut), the Jubilee River , was built between Maidenhead and Windsor for flood relief and completed in 2002. The non-tidal section of the river is managed by the Environment Agency , which
6528-423: The confluence, the overall length of the Thames measured from Seven Springs, at 229 mi (369 km), is greater than the Severn's length of 220 mi (350 km). Thus, the "Churn/Thames" river may be regarded as the longest natural river in the United Kingdom. The stream from Seven Springs is joined at Coberley by a longer tributary which could further increase the length of the Thames, with its source in
6630-405: The export of bricks and granite along this short navigation proved profitable for many years. The navigation from Launceston to Tamerton was completed in 1826 as part of a separate project, the Bude Canal . The Tamar Manure Navigation ceased functioning in 1929 and the company was wound up in 1942. In 997 according to the Anglo-Saxon Chronicle , raiding Vikings travelled up the Tamar and then
6732-412: The flowing river or the wide flowing unfordable river. The river gives its name to three informal areas: the Thames Valley , a region of England around the river between Oxford and West London; the Thames Gateway ; and the greatly overlapping Thames Estuary around the tidal Thames to the east of London and including the waterway itself. Thames Valley Police is a formal body that takes its name from
6834-451: The giants on a dance, but never let them touch her, instead darting out of reach whenever they came too close. Tamara's father, who had been out looking for her, located her just as the giants finally caught up with her near Morwenstow . He flew into a rage and used a spell to put Tavy and Tawradge into a deep sleep. This infuriated Tamara, who subsequently refused to return to the underworld with her father. He became even more enraged and cast
6936-533: The grounds of the National Star College at Ullenwood . The Thames flows through or alongside Ashton Keynes , Cricklade , Lechlade , Oxford , Abingdon-on-Thames , Wallingford , Goring-on-Thames and Streatley (at the Goring Gap ), Pangbourne and Whitchurch-on-Thames , Reading , Wargrave , Henley-on-Thames , Marlow , Maidenhead , Windsor and Eton , Staines-upon-Thames and Egham , Chertsey , Shepperton , Weybridge , Sunbury-on-Thames , Walton-on-Thames , Molesey and Thames Ditton . The river
7038-406: The heat of the Earth's core, which gave rise to ores containing tin , copper , tungsten , lead and other minerals in the Valley. The medieval estate of Cotehele , owned by the Edgcumbe family, was a significant producer of silver for the Royal Mint . During the industrial revolution, there was significant mining activity near the river, between Gunnislake and Weir Quay. During this period,
7140-404: The ice melt nearly concluded over the past 4,000 years. Since the beginning of the 20th century, rates of sea level rise range from 1.22 mm per year to 2.14 mm per year. The Thames River Basin District, including the Medway catchment, covers an area of 6,229 sq mi (16,130 km ). The entire river basin is a mixture of urban and rural, with rural landscape predominating in
7242-416: The impresario Fred Karno and Eel Pie Island at Twickenham was the birthplace of the South East's R&B music scene. Westminster Abbey and the Palace of Westminster (commonly known today as the Houses of Parliament ) were built on Thorney Island , which used to be an eyot . Researchers have identified the River Thames as a discrete drainage line flowing as early as 58 million years ago, in
7344-573: The lower Tamar (below Launceston ) and its tributaries the Tavy and the Lynher . It was first proposed in 1963, but was not designated until 1995. The highest point in the AONB is Kit Hill , 334 metres above sea level. The Tamar Discovery Trail is a 35-mile hiking route following the course of the Tamar through the valley. The Plymouth Sound and Estuaries are a Special Area of Conservation . Rocky reefs in low salinity estuarine conditions far inland on
7446-599: The natural river: at Upper Tamar Lake the border follows the line of the river as it was prior to the construction of the reservoir (therefore now within the lake), whilst at the older Lower Tamar Lake the border was re-aligned along a (now disused) re-routing of the river to the reservoir's west side, placing the lake in Devon. List of crossings of the River Tamar The river has 22 road crossings, including some medieval stone bridges. The oldest bridge still extant
7548-554: The next kind so returned to Devon. This legend is set to music in the traditional Cornish folk song Fish and Tin and Copper . The legend behind the name involves a nymph by the name of Tamara, who lived in the underworld. Tamara wanted to wander freely in the mortal world, against the advice of her parents. One day, wandering in Dartmoor , she happened to meet two giants called Tavy and Torridge (or Tawradge). Both giants became smitten with Tamara and vied for her affections. Tamara led
7650-426: The non-tidal river, which is a drinking water source before treatment, sanitary sewer overflow from the many sewage treatment plants covering the upper Thames basin should be rare in the non-tidal Thames. However, storm sewage overflows are still common in almost all the main tributaries of the Thames despite claims by Thames Water to the contrary. Below Teddington Lock (about 55 mi or 89 km upstream of
7752-481: The outside world only through the port of Calstock, was extended to the Plymouth, Devonport and South Western Junction Railway at Bere Alston . Tourist and market traffic on the river, using purpose-built or converted steamers, remained substantial until the Devonport piers were closed and the ships requisitioned on the outbreak of war in 1939. Rocks around the edge of Dartmoor were mineralised by fluids driven by
7854-400: The parish of Bridgerule to Devon and part of the parish of North Tamerton to Cornwall — these latter transfers created two of the present-day 'exceptions' to the river boundary. The modern administrative border between Devon and Cornwall more closely follows the Tamar and Hamoaze than the 'historic' county border (of the 11th to 19th centuries). Only three 'exceptions' to the rule that
7956-483: The quantity and varieties of invertebrates , angiosperms and fish. Chemical status, which compares the concentrations of various chemicals against known safe concentrations, is rated good or fail. According to Ordnance Survey mapping, the source of the Tamar is at Woolley Moor, approximately 3.5 miles (5.6 km) from the north Cornish coast, at 50°55′06″N 4°27′48″W / 50.9184°N 4.4633°W / 50.9184; -4.4633 . The location of
8058-495: The river are called the Tideway , derived from its long tidal reach up to Teddington Lock . Its tidal section includes most of its London stretch and has a rise and fall of 23 ft (7 m). From Oxford to the estuary, the Thames drops by 55 metres (180 ft). Running through some of the drier parts of mainland Britain and heavily abstracted for drinking water, the Thames' discharge is low considering its length and breadth:
8160-516: The river between Plymouth and Calstock ; excursions used to operate as far as Morwellham Quay , but were suspended indefinitely in 2016. A passenger ferry also operates April to October between Cotehele Quay and Calstock. A typical Tamar vessel was a sailing barge , built on the open river bank, of up to 60 tons, with a peaked, gaff-rigged mainsail and a fore staysail . The Tamar was navigable by seagoing ships of up to 400 register tons as far inland as Weir Quay , near Bere Alston , where
8262-490: The river diminished towards the end of the 19th century, after the Plymouth, Devonport and South Western Junction Railway reached Tavistock in 1859 (so making the Tavistock Canal to Morwellham redundant for transport, although it remains in use as a source of hydropower ) and as the copper and tin mines became exhausted. The decline accelerated from 1894, when the East Cornwall Mineral Railway , until then linked to
8364-637: The river passes Pimlico and Vauxhall , and then forms one of the principal axes of the city, from the Palace of Westminster to the Tower of London . At this point, it historically formed the southern boundary of the medieval city, with Southwark , on the opposite bank, then being part of Surrey . Beyond central London, the river passes Bermondsey , Wapping , Shadwell , Limehouse , Rotherhithe , Millwall , Deptford , Greenwich , Cubitt Town , Blackwall , New Charlton and Silvertown , before flowing through
8466-403: The river quays; the lime had to be made locally as it was not slaked before application, and was too chemically reactive for transport by water after burning. Later, street sweepings and other refuse from Plymouth and Devonport , together with bones for the newly discovered bone fertiliser , were carried inland to manure the fields. Other regular imports were timber from British Columbia and
8568-439: The river was tidal at peak spring tides as far as Staines upon Thames . In descending order, non-related tributaries of the non-tidal Thames, with river status, are the Churn , Leach , Cole , Ray , Coln , Windrush , Evenlode , Cherwell , Ock , Thame , Pang , Kennet , Loddon , Colne , Wey and Mole . In addition, there are occasional backwaters and artificial cuts that form islands, distributaries (most numerous in
8670-596: The river, covering three counties . In non-administrative use, the river's name is used in those of Thames Valley University , Thames Water , Thames Television , publishing company Thames & Hudson , Thameslink (north–south rail service passing through central London ) and South Thames College . An example of its use in the names of historic entities is the Thames Ironworks and Shipbuilding Company . Marks of human activity, in some cases dating back to Pre-Roman Britain , are visible at various points along
8772-517: The river, while some islands, e.g. Thorney Island , formed over the ages. The northern tip of the ancient parish of Lambeth , for example, was marshland known as Lambeth Marshe , but it was drained in the 18th century; the street names Lower Marsh and Upper Marsh preserve a memory. Until the middle of the Victorian era, malaria was commonplace beside the River Thames, even in London, and
8874-467: The river. These include a variety of structures connected with use of the river, such as navigations, bridges and watermills , as well as prehistoric burial mounds . The lower Thames in the Roman era was a shallow waterway winding through marshes. But centuries of human intervention have transformed it into a deep tidal canal flowing between 200 miles of solid walls; these defend a floodplain where 1.5 million people work and live. A major maritime route
8976-661: The sandbank was a major hazard for shipping coming in and out of London, in 1732 it received the world's first lightship . This became a major landmark, and was used as an assembly point for shipping. Today it is marked by Sea Reach No. 1 Buoy. The River Thames contains over 80 islands ranging from the large estuarial marshlands of the Isle of Sheppey and Canvey Island to small tree-covered islets like Rose Isle in Oxfordshire and Headpile Eyot in Berkshire. They are found all
9078-541: The south coast), and the Wilts & Berks Canal . Rowing and sailing clubs are common along the Thames, which is navigable to such vessels. Kayaking and canoeing also take place. Major annual events include the Henley Royal Regatta and the Boat Race , while the Thames has been used during two Summer Olympic Games : 1908 ( rowing ) and 1948 ( rowing and canoeing ). Safe headwaters and reaches are
9180-403: The spring is a "high windswept plateau largely devoid of farmland, and inhabited by stunted trees and wiry undergrowth." The exact source of the river is difficult to pinpoint, because it arises "from a boggy morass . . . behind a hedge near some willow trees at Woolley Barrows . . . A small square stone culvert drains the first tentative trickle of water away from the bog, through a hedge and into
9282-591: The tidal Tamar to the water level above the weir. A salmon ladder bypassed the lock. The navigable route along the Tamar and the Manure Canal that was managed by the company (from Morwellham Quay upstream to Blanchdown) was known as the Tamar Manure Navigation and was 3.0 miles (4.8 km) in length. The import of fertilizer (at the time of the construction of the canal all types of which were typically referred to as "manure") and coal and
9384-625: The valley has been almost continuously exploited for its rich mineral and metal deposits including silver, tin, lead and arsenic leaving a unique archaeological landscape which forms a significant part of the Cornwall and West Devon Mining Landscape. Remains include wheal or engine houses, deep and open cast mines dating from the Bronze Age through to the medieval and modern era, the export docks at Morwellham Quay were once an international centre of trade in copper, lead and arsenic. The valley, with
9486-756: The way from Fiddler's Island in Oxfordshire to the Isle of Sheppey in Kent. Some of the largest inland islands, for example Formosa Island near Cookham and Andersey Island at Abingdon, were created naturally when the course of the river divided into separate streams. In the Oxford area the river splits into several streams across the floodplain ( Seacourt Stream , Castle Mill Stream , Bulstake Stream and others), creating several islands ( Fiddler's Island , Osney and others). Desborough Island , Ham Island at Old Windsor and Penton Hook Island were artificially created by lock cuts and navigation channels. Chiswick Eyot
9588-412: The western part. The area is among the driest in the United Kingdom. Water resources consist of groundwater from aquifers and water taken from the Thames and its tributaries, much of it stored in large bank-side reservoirs . The Thames itself provides two-thirds of London's drinking water, while groundwater supplies about 40 per cent of public water supplies in the overall catchment area. Groundwater
9690-580: The year, while those at Thames Head are seasonal (a winterbourne ). With a length of 215 mi (346 km), the Thames is the longest river entirely in England. (The longest river in the United Kingdom, the Severn , flows partly in Wales .) However, as the River Churn, sourced at Seven Springs, is 14 mi (23 km) longer than the section of the Thames from its traditional source at Thames Head to
9792-580: Was 73 feet (22 m) long and 42 feet (13 m) wide, allowing transport for 24 cars per journey. The ferry passage played a significant part in the Normandy Landings during World War II . A temporary training camp for 2,000 soldiers was set up at St Budeaux , to the east. Troops from the V and VII Corps of the US Army left from the Saltash passage towards Normandy, who are commemorated in
9894-479: Was built at the site of London Bridge . London Bridge is now used as the basis for published tide tables giving the times of high tide . High tide reaches Putney about 30 minutes later than London Bridge, and Teddington about an hour later. The tidal stretch of the river is known as "the Tideway ". Tide tables are published by the Port of London Authority and are available online. Times of high and low tides are also posted on Twitter. The principal tributaries of
9996-463: Was frequently lethal. Some cases continued to occur into the early 20th century. Draining of the marshes helped with its eradication, but the causes are complex and unclear. The East End of London , also known simply as the East End , was the area of London east of the medieval walled City of London and north of the River Thames, although it is not defined by universally accepted formal boundaries;
10098-651: Was owned by the Valletort family in the 12th and early 13th centuries before being sold in 1270. In 1385, the Burgesses of Saltash were granted a lease to run the ferry for 200 years. In 1733, it capsized and sank, with the loss of 20 lives. The ferry was revived in 1832 by John Parker, 1st Earl of Morley and Sir William Molesworth , who obtain an act of Parliament, the Saltash Floating Bridge Act 1832 ( 2 & 3 Will. 4 . c. vii) authorising
10200-489: Was restored to the Tamar in 1966, when the civil parishes of North Petherwin and Werrington were transferred from Devon to Cornwall. The Counties (Detached Parts) Act 1844 ensured parishes were entirely within one county. It transferred a part of the Rame Peninsula (on the west side of the Hamoaze ) from Devon to Cornwall (namely, parts of the parishes of Maker and St John ). The Act also transferred part of
10302-617: Was subject to minor redefining and widening of the main channel around Oxford, Abingdon and Marlow before 1850, when further cuts to ease navigation reduced distances further. Molesey faces Hampton , and in Greater London the Thames passes Hampton Court Palace , Surbiton , Kingston upon Thames , Teddington , Twickenham , Richmond (with a famous view of the Thames from Richmond Hill), Syon House , Kew , Brentford , Chiswick , Barnes , Hammersmith , Fulham , Putney , Wandsworth , Battersea and Chelsea . In central London ,
10404-457: Was the speedy Tamar, which divides The Cornish and the Devonish confines; Through both whose borders swiftly downe it glides. And, meeting Plim, to Plimmouth thence declines: And Dart, nigh chockt with sands of tinny mines; From "Rivers of England" by Edmund Spenser The Alliterative Morte Arthure states that the mortal combat of King Arthur and Mordred took place close to
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