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The River Dee (, ) flows through
North Wales North Wales ( ) is a Regions of Wales, region of Wales, encompassing its northernmost areas. It borders mid Wales to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, with Snowdon ...
and
Cheshire Cheshire ( ) is a Ceremonial counties of England, ceremonial county in North West England. It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shrop ...
, England. The majority of the river is located in Wales, with the stretch between Aldford and
Saltney Saltney is a town straddling the counties of Flintshire and Cheshire on the England–Wales border. The local government Community (Wales), community of Saltney lies entirely in Wales, while the English areas are Unparished area, unparished. The ...
within England and two other sections forming the border between the two countries. The length of the section from Bala to
Chester Chester is a cathedral city in Cheshire, England, on the River Dee, Wales, River Dee, close to the England–Wales border. With a built-up area population of 92,760 in 2021, it is the most populous settlement in the borough of Cheshire West an ...
is . The river rises on Dduallt in
Snowdonia Snowdonia, or Eryri (), is a mountainous region and National parks of the United Kingdom, national park in North Wales. It contains all 15 mountains in Wales Welsh 3000s, over 3000 feet high, including the country's highest, Snowdon (), which i ...
and flows east through Bala Lake, Corwen, and
Llangollen Llangollen () is a town and community (Wales), community, situated on the River Dee, Wales, River Dee, in Denbighshire, Wales. Its riverside location forms the edge of the Berwyn range, and the Dee Valley section of the Clwydian Range and Dee Val ...
. It turns north near Overton-on-Dee and forms part of the England–Wales border before fully entering England near Aldford, north-east of Wrexham. It flows through Chester then re-enters Wales near Saltney; the final section is canalised and discharges to the
Irish Sea The Irish Sea is a body of water that separates the islands of Ireland and Great Britain. It is linked to the Celtic Sea in the south by St George's Channel and to the Inner Seas off the West Coast of Scotland in the north by the North Ch ...
via an
estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime enviro ...
long.


History

The River Dee was the traditional boundary of the
Kingdom of Gwynedd The Kingdom of Gwynedd (Medieval Latin: ; Middle Welsh: ) was a Wales in the Early Middle Ages, Welsh kingdom and a Roman Empire Succession of states, successor state that emerged in sub-Roman Britain in the 5th century during the Anglo-Saxon ...
in Wales for centuries, possibly since its founding in the 5th century. It was recorded in the 13th century (in mainstream Middle English orthography, lacking the letters v and w) as ''flumen Dubr Duiu''; the name appears to derive from the Brythonic ''dēvā'': "River of the Goddess" or " Holy River". The river is personified as the war and fate goddess Aerfen. The river name inspired the name of Roman fortress ''
Deva Victrix Deva Victrix, or simply Deva, was a legionary castra, fortress and town in the Roman province of Britannia on the site of the modern city of Chester. The fortress was built by the Legio II Adiutrix, Legio II ''Adiutrix'' in the 70s AD as the ...
''. It is the only river in the UK to be subject to a Water Protection Zone along its whole length down to Chester weir.


Statistics

The total catchment area of the River Dee down to Chester Weir is . The estimated average annual rainfall over the catchment area is , yielding an average flow of 37  m3/s. The larger reservoirs in the catchment area are: * Bala Lake (): * Llyn Brenig: *
Llyn Celyn Llyn Celyn () is a reservoir constructed between 1960 and 1965 including the highly controversial Tryweryn flooding in the valley of the River Afon Tryweryn, Tryweryn in Gwynedd, Wales. This included the forcible removal of the Capel Celyn vil ...
:


Catchment


Natural course


Source to Corwen

The River Dee has its source on the slopes of Dduallt above Llanuwchllyn in the mountains of
Snowdonia Snowdonia, or Eryri (), is a mountainous region and National parks of the United Kingdom, national park in North Wales. It contains all 15 mountains in Wales Welsh 3000s, over 3000 feet high, including the country's highest, Snowdon (), which i ...
in Meirionydd,
Gwynedd Gwynedd () is a county in the north-west of Wales. It borders Anglesey across the Menai Strait to the north, Conwy, Denbighshire, and Powys to the east, Ceredigion over the Dyfi estuary to the south, and the Irish Sea to the west. The ci ...
, Wales. Between its source and Bala Lake the river is known by its Welsh name, ''Afon Dyfrdwy''. Legend tells that the waters of the river pass through Bala Lake and emerge undiluted and unmixed at the outflow. On leaving Bala the river meets its confluence with Afon Tryweryn and passes through the Bala sluice gates, part of the Dee Regulation System protecting communities further downstream from severe flooding. Skirting the village of Llanfor, the path of the river takes it past Llandderfel and under the Grade II listed Pont Fawr bridge. The river trends generally northeast through the Vale of Edeyrnion, shadowed by the B4401 Bala to Cynwyd road. Leaving Gwynedd and entering Denbighshire the Dee flows beneath other historic bridges at Llandrillo and Cynwyd before arriving at the town of Corwen.


Corwen to Llangollen

From here the river passes the
Iron Age The Iron Age () is the final epoch of the three historical Metal Ages, after the Chalcolithic and Bronze Age. It has also been considered as the final age of the three-age division starting with prehistory (before recorded history) and progre ...
hillfort A hillfort is a type of fortification, fortified refuge or defended settlement located to exploit a rise in elevation for defensive advantage. They are typical of the late Bronze Age Europe, European Bronze Age and Iron Age Europe, Iron Age. So ...
of Caer Drewyn and enters the Clwydian Range and Dee Valley AONB. Through its forested valley the course takes it through Carrog, Glyndyfrdwy and Llantysilio, with the Llangollen Railway following the river on its route between
Llangollen Llangollen () is a town and community (Wales), community, situated on the River Dee, Wales, River Dee, in Denbighshire, Wales. Its riverside location forms the edge of the Berwyn range, and the Dee Valley section of the Clwydian Range and Dee Val ...
and Corwen. At Berwyn the river passes over the manmade Horseshoe Falls, before picking up speed on a downhill gradient past the Chain Bridge Hotel and its historic pedestrian bridge. First built in 1814, and later refurbished by Henry Robertson in 1870, it was considered a marvel of early suspension bridge design. In 1928 the original bridge was destroyed by severe flooding and was rebuilt in its current form from original parts in 1929. The course of the river then takes it through
Llangollen Llangollen () is a town and community (Wales), community, situated on the River Dee, Wales, River Dee, in Denbighshire, Wales. Its riverside location forms the edge of the Berwyn range, and the Dee Valley section of the Clwydian Range and Dee Val ...
and under its 16th-century, Grade I listed bridge. The bridge is also a Scheduled Ancient Monument and considered one of the Seven Wonders of Wales.


Llangollen to Bangor-on-Dee

On leaving Llangollen the river continues east, to the south of the Carboniferous Limestone exposures of Eglwyseg Rocks () and Trevor Rocks. Overlooking the river here is the
medieval In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of World history (field), global history. It began with the fall of the West ...
Castell Dinas Brân, a ruined fortress abandoned by John de Warenne, 6th Earl of Surrey in 1282. The river then enters Wrexham County Borough, passing south of Trevor and under Thomas Telford's
Pontcysyllte Aqueduct The Pontcysyllte Aqueduct (; ) is a navigable aqueduct that carries the Llangollen Canal across the River Dee in the Vale of Llangollen in northeast Wales. The 18-arched stone and cast iron structure is for use by narrowboats and was complet ...
, of 1805, which carries the
Llangollen Canal The Llangollen Canal () is a navigable canals of the United Kingdom, 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, S ...
overhead. Less than a mile east of the aqueduct at Cefn Mawr, the river is crossed by the Cefn Mawr Viaduct, built in 1848 by Thomas Brassey and carrying the Shrewsbury to Chester railway line over the Dee. Beyond this point the river forms the boundary between Wrexham County Borough in Wales and
Shropshire Shropshire (; abbreviated SalopAlso used officially as the name of the county from 1974–1980. The demonym for inhabitants of the county "Salopian" derives from this name.) is a Ceremonial counties of England, ceremonial county in the West M ...
in the West Midlands of England. Passing
Chirk Chirk () is a town and Community (Wales), community in Wrexham County Borough, Wales, south of Wrexham, between it and Oswestry. At the 2011 census, it had a population of 4,468. Historically in the historic counties of Wales, traditional coun ...
and the confluence with the River Ceiriog, the river begins to trace gentle meanders on the level ground at the beginning of the Cheshire Plain. The course continues past Erbistock on the Welsh side, and the 5th-century earthwork of Wat's Dyke on the English, before passing wholly into Wales at Overton bridge. A couple more miles downstream is Bangor-on-Dee, known for its racecourse and its
bridge A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or railway) without blocking the path underneath. It is constructed for the purpose of providing passage over the obstacle, whi ...
. Until 1974 this area was part of an
exclave An enclave is a territory that is entirely surrounded by the territory of only one other state or entity. An enclave can be an independent territory or part of a larger one. Enclaves may also exist within territorial waters. ''Enclave'' is s ...
of historic
Flintshire Flintshire () is a county in the north-east of Wales. It borders the Irish Sea to the north, the Dee Estuary to the north-east, the English county of Cheshire to the east, Wrexham County Borough to the south, and Denbighshire to the west. ...
known as English Maelor ().


Bangor to Eaton

The Dee continues to meander past Worthenbury where it is joined by the River Clywedog. At this point the border between Wrexham and
Cheshire West and Chester Cheshire West and Chester is a Unitary authorities of England, unitary authority area with Borough status in the United Kingdom, borough status in Cheshire, England. It was established on 1 April 2009 as part of the 2009 structural changes to l ...
follows the course of the river. It passes the
Cheshire Cheshire ( ) is a Ceremonial counties of England, ceremonial county in North West England. It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shrop ...
village of Crewe by Farndon, before cutting between Holt in Wales and Farndon in England beneath the 14th-century, Grade I listed Farndon Bridge. One of the major tributaries of the Dee, the River Alyn (), crosses the Carboniferous Limestone from Mynydd Helygain (a.k.a. Halkyn Mountain) and runs down through the Loggerheads area before making its confluence north of Holt. Throughout the length of the Alyn there are numerous swallow holes and caverns and during the summer months long stretches of the river bed run dry. These caves include Ogof Hesp Alyn and Ogof Hen Ffynhonnau. A significant part of this lost flow reemerges in the Milwr Tunnel, a manmade tunnel, entering the west bank of the Dee estuary and carrying 12 million imperial gallons per day (600 L/s). This tunnel was originally constructed to drain metal mines in Halkyn Mountain. Once the main River Dee approaches the Cheshire border and the
Carboniferous The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...
Coal Measures, it turns sharply northwards before meandering up to
Chester Chester is a cathedral city in Cheshire, England, on the River Dee, Wales, River Dee, close to the England–Wales border. With a built-up area population of 92,760 in 2021, it is the most populous settlement in the borough of Cheshire West an ...
. This long stretch of the river drops in height by only a few feet. The rich adjoining farmland has many remnants of abandoned coal workings and deep
clay pit A clay pit is a quarry or Mining, mine for the extraction of clay, which is generally used for manufacturing pottery, bricks or Portland cement. Quarries where clay is mined to make bricks are sometimes called brick pits. A brickyard or brickwor ...
s used to make
brick A brick is a type of construction material used to build walls, pavements and other elements in masonry construction. Properly, the term ''brick'' denotes a unit primarily composed of clay. But is now also used informally to denote building un ...
s and
tile Tiles are usually thin, square or rectangular coverings manufactured from hard-wearing material such as ceramic, Rock (geology), stone, metal, baked clay, or even glass. They are generally fixed in place in an array to cover roofs, floors, wal ...
s. A number of these pits are now being used as
landfill A landfill is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was ...
sites for domestic and commercial waste. Approaching Churton and Aldford, the river crosses entirely into England, and passes the grand country house of Eaton Hall, seat of the Duke of Westminster.


Eaton to Chester

The river then continues past the village of Eccleston and beneath the A55 North Wales Expressway, tracing northwards past the Roman Eaton Road to the Chester suburbs of Huntington and Handbridge before reaching the centre of Chester. In the city centre the river passes and around the Earl's Eye(s) meadow at Queen's Park. In this vicinity, the riverside is used as a recreation area with a bandstand, benches and boat cruises, being crossed by four bridges. The first is the Queen's Park Suspension Bridge, which forms the only exclusively pedestrian footway across the river in Chester. The second is the Old Dee Bridge, a road bridge and by far the oldest bridge in Chester, being built in about 1387 on the site of a series of wooden predecessors which dated originally from the Roman period. Above the Old Dee Bridge is Chester Weir, which was built by Hugh Lupus to supply power to his corn mills. Throughout the centuries the weir has been used to power corn,
fulling Fulling, also known as tucking or walking ( Scots: ''waukin'', hence often spelt waulking in Scottish English), is a step in woollen clothmaking which involves the cleansing of woven cloth (particularly wool) to eliminate ( lanolin) oils, ...
, needle, snuff and flint mills. The same weir was used as part of a
hydroelectric Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energ ...
scheme in 1911 with the help of a small generator building which is still visible today, used as a pumping station for water since 1951. However the first water pumping station here was set up in 1600 by John Tyrer who pumped water to a square tower built on the city's Bridgegate. It was destroyed in the Civil War but an octagonal tower built in 1690 for the same purpose lasted until the gate was replaced with an arch in the mid-18th century. On this weir is a fish pass and fish counting station to monitor the numbers of
salmon Salmon (; : salmon) are any of several list of commercially important fish species, commercially important species of euryhaline ray-finned fish from the genera ''Salmo'' and ''Oncorhynchus'' of the family (biology), family Salmonidae, native ...
ascending the river, and also a weirgate for navigating the weir at spring tides. A little further downstream stands the Grosvenor Bridge (designed by architect Thomas Harrison of Chester), which was opened in 1833 to ease congestion on the Old Dee Bridge. This bridge was opened by Princess Victoria five years before she became Queen. The other side of the Grosvenor Bridge is the Roodee, Chester's racecourse and the oldest course in the country. This used to be the site of Chester's Roman harbour until, aided by the building of the weir, the River Dee silted up to become the size it is today. The only curiously remaining reminder of this site's maritime past is a stone cross which stands in the middle of the Roodee which exhibits the marks of water ripples. To the end of the Roodee the river is crossed by Chester's fourth bridge which carries the North Wales Coast railway line, before leaving Chester. This was the scene of one of the first serious railway accidents in the country, the Dee bridge disaster.


Canalised section

West of Chester, the river flows along an artificial channel excavated by the between 1732 and 1736. The work was planned and undertaken by engineers from the Netherlands and paid for by local merchants and Chester Corporation. It was an attempt to improve navigation for shipping and reduce silting. Chester's trade had declined steadily since the end of the 17th century as sediment had prevented larger craft reaching the city, spelling the end for the Port of Chester. After four years' work, the river was diverted from its meandering natural course which passed Blacon,
Saughall Saughall is a village in the civil parish of Saughall and Shotwick Park, in the unitary authority area of Cheshire West and Chester and the ceremonial county of Cheshire, England. Located between Shotwick and Blacon, it is approximately nor ...
, Shotwick Castle, Burton and Parkgate and up the west shore of Wirral. Instead, the new canalised section followed the coast along northeast Wales. During this time, Sealand and Shotton were reclaimed from the
estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime enviro ...
. Land reclamation in this area continued until 1916. The river's natural course can still be determined by following the bank and low bluffs that mark the western edge of the Wirral Peninsula. The manmade channel, which runs in a straight line for , passes into Wales and
Flintshire Flintshire () is a county in the north-east of Wales. It borders the Irish Sea to the north, the Dee Estuary to the north-east, the English county of Cheshire to the east, Wrexham County Borough to the south, and Denbighshire to the west. ...
at
Saltney Saltney is a town straddling the counties of Flintshire and Cheshire on the England–Wales border. The local government Community (Wales), community of Saltney lies entirely in Wales, while the English areas are Unparished area, unparished. The ...
. On the west shore is Hawarden Airport and the large
Airbus Airbus SE ( ; ; ; ) is a Pan-European aerospace corporation. The company's primary business is the design and manufacturing of commercial aircraft but it also has separate Airbus Defence and Space, defence and space and Airbus Helicopters, he ...
factory at Broughton. This region is known as Deeside and contains several heavy industries. From here the Dee passes beneath three road bridges. The first two are adjacent to each other at Queensferry. They are a 1960s fixed-arch bridge carrying the A494 Queensferry to Dolgellau
trunk road A trunk road is a major highway with a specific legal classification in some jurisdictions, notably the United Kingdom, Sweden and formerly Ireland. Trunk roads are planned and managed at the national-level, distinguishing them from non-trunk ro ...
and its predecessor the Jubilee Bridge, which is a rolling
bascule bridge A bascule bridge (also referred to as a drawbridge or a lifting bridge) is a moveable bridge with a counterweight that continuously balances a span, or leaf, throughout its upward swing to provide clearance for boat traffic. It may be single- o ...
completed in 1926. The third crossing, and the most recent, is at Connah's Quay. The Flintshire Bridge is a fixed cable-stayed bridge that opened in 1999. Between the second and third road bridges is Hawarden railway bridge at Shotton, originally constructed as a swing bridge but now never opened. It carries the to Borderlands Line over the river. station serves the Deeside Industrial Park, Deeside Power Station and the works at Dee Marsh. A footbridge replaced the passenger ferry at Saltney in the 1970s.


Estuary

Beyond Connah's Quay the river opens out into the Dee Estuary, forming the northeasternmost section of the
North Wales North Wales ( ) is a Regions of Wales, region of Wales, encompassing its northernmost areas. It borders mid Wales to the south, England to the east, and the Irish Sea to the north and west. The area is highly mountainous and rural, with Snowdon ...
coast and the western coast of the Wirral. Towns along the coast include
Flint Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was widely used to make stone tools and start ...
, Holywell and Mostyn on the Welsh side and Neston, Parkgate, Heswall, West Kirby and Hoylake on the Wirral side. South of Bagillt and Parkgate the Dee Estuary forms the boundary between the local authority areas of
Flintshire Flintshire () is a county in the north-east of Wales. It borders the Irish Sea to the north, the Dee Estuary to the north-east, the English county of Cheshire to the east, Wrexham County Borough to the south, and Denbighshire to the west. ...
and
Cheshire West and Chester Cheshire West and Chester is a Unitary authorities of England, unitary authority area with Borough status in the United Kingdom, borough status in Cheshire, England. It was established on 1 April 2009 as part of the 2009 structural changes to l ...
. Northwards it forms the boundary with the
Metropolitan Borough of Wirral The Metropolitan Borough of Wirral is a metropolitan borough of Merseyside, in North West England. It has a population of (), and encompasses of the northern part of the Wirral Peninsula. Major settlements include Birkenhead, Wallasey, Bebingt ...
in
Merseyside Merseyside ( ) is a ceremonial counties of England, ceremonial and metropolitan county in North West England. It borders Lancashire to the north, Greater Manchester to the east, Cheshire to the south, the Wales, Welsh county of Flintshire across ...
,
North West England North West England is one of nine official regions of England and consists of the ceremonial counties of England, ceremonial counties of Cheshire, Cumbria, Greater Manchester, Lancashire and Merseyside. The North West had a population of 7,4 ...
. The estuary continues to widen until finally entering the
Irish Sea The Irish Sea is a body of water that separates the islands of Ireland and Great Britain. It is linked to the Celtic Sea in the south by St George's Channel and to the Inner Seas off the West Coast of Scotland in the north by the North Ch ...
and Liverpool Bay between the northernmost point of mainland Wales, Point of Ayr at Talacre, Flintshire and Hilbre Point, near Hoylake and West Kirby in Wirral,
Merseyside Merseyside ( ) is a ceremonial counties of England, ceremonial and metropolitan county in North West England. It borders Lancashire to the north, Greater Manchester to the east, Cheshire to the south, the Wales, Welsh county of Flintshire across ...
. Hilbre Island, part of Wirral, straddles the mouth of the estuary at this point. The waters of the Dee then converge with those of the River Mersey and Ribble, producing a notable drop in salinity and increase in sediment which can be tracked a considerable distance along the Sefton and
Lancashire Lancashire ( , ; abbreviated ''Lancs'') is a ceremonial county in North West England. It is bordered by Cumbria to the north, North Yorkshire and West Yorkshire to the east, Greater Manchester and Merseyside to the south, and the Irish Sea to ...
coasts. The estuary is hugely important for birdlife and has been designated both as an SSSI and as a
Ramsar site A Ramsar site is a wetland site designated to be of international importance under the Ramsar Convention,8 ha (O) *** Permanent 8 ha (P) *** Seasonal Intermittent < 8 ha(Ts) **
saltmarsh developed on both sides but principally on the right bank north and south of Neston. The estuary owes its origins to the scouring of a broad channel through the
Triassic The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is t ...
sandstones and
Carboniferous The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...
mudstones by glacial ice during successive
ice age An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages, and g ...
s to form an iceway. The channel continues inland south of Chester but its higher reaches have long since been infilled with sand, gravel and mud. The process of infilling by mud continues to the present day as the rapid growth of the saltmarsh in the last century testifies, pushing the high tide line further out into the estuary.


Uses


Industry

Large parts of the catchment are devoted to agriculture and there a number of abstractions made from the river for summer irrigation. The volumes involved are not however significant. From Chirk downstream, the river valley has supported a wide range of industries that were initially drawn to the area by the presence of coal mines and later by the deep deposits of
Carboniferous The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...
clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolinite, ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impuriti ...
s used to make
brick A brick is a type of construction material used to build walls, pavements and other elements in masonry construction. Properly, the term ''brick'' denotes a unit primarily composed of clay. But is now also used informally to denote building un ...
s and
tile Tiles are usually thin, square or rectangular coverings manufactured from hard-wearing material such as ceramic, Rock (geology), stone, metal, baked clay, or even glass. They are generally fixed in place in an array to cover roofs, floors, wal ...
s. The coal industry in particular gave rise to a number of chemical industries some of which survive to this day and which both take water from the river and discharge their cleaned up effluent back into the river. Industries in the valley include commercial chemicals manufacture, wood chip and MDF fabrication, cocoa milling, fibreglass manufacture,
waste disposal Waste management or waste disposal includes the processes and actions required to manage waste from its inception to its final Waste disposal, disposal. This includes the Waste collection, collection, transport, Sewage treatment, treatm ...
(in old
clay pit A clay pit is a quarry or Mining, mine for the extraction of clay, which is generally used for manufacturing pottery, bricks or Portland cement. Quarries where clay is mined to make bricks are sometimes called brick pits. A brickyard or brickwor ...
s) and a great variety of smaller industries concentrated around
Wrexham Wrexham ( ; ) is a city status in the United Kingdom, city in the North East Wales, north-east of Wales. It lies between the Cambrian Mountains, Welsh mountains and the lower River Dee, Wales, Dee Valley, near the England–Wales border, borde ...
. The main impact on the river of these industries is their thirst for a dependable good quality water supply. Previously the wings for the
Airbus A380 The Airbus A380 is a very large wide-body airliner, developed and produced by Airbus until 2021. It is the world's largest passenger airliner and the only full-length double-deck jet airliner. Airbus studies started in 1988, and the pr ...
, which were made at Airbus's manufacturing factory in Broughton, were taken downriver by barge to the Port of Mostyn because they were too large to be shipped in an Airbus Beluga. However, the dredging of the river for the barge may be responsible for a weakening of the tidal bore.


Abstractions

There are a number of direct water abstractions upstream of Chester by three water companies and by the canal. The size of the abstraction is very large compared to the summer flow and the flow in the river is very highly regulated through the use of reservoirs to store water in the winter and release it in the summer. The whole system is managed as the Dee Regulation Scheme. Below Chester water is also abstracted as cooling water by the gas-fired power station at Connah's Quay. Process and cooling water is also abstracted for the
paper mill A paper mill is a factory devoted to making paper from vegetable fibres such as wood pulp, old rags, and other ingredients. Prior to the invention and adoption of the Fourdrinier machine and other types of paper machine that use an endless belt ...
and power station at Shotton.


Water sport

The Dee used to be a popular
whitewater kayaking Whitewater kayaking is an outdoor adventure sport where paddlers navigate a river in a specially designed kayak. Whitewater kayaking includes several styles: river running, creeking, slalom, playboating, and squirt boating. Each style offers ...
and touring river (particularly the grade III/IV whitewater section upstream of Llangollen). It stays high after rain for longer than most British rivers and is paddleable year-round (thanks to the Dee Regulation Scheme). Canoeing used to be allowed on about twelve weekends per year, and tens of thousands of canoeists descended on Llangollen for recreational paddling (several Dee tours were held every winter), slalom competitions, and wild water races. In 2003, negotiations with the
angling Angling (from Old English ''angol'', meaning "hook") is a fishing technique that uses a fish hook attached to a fishing line to tether individual fish in the mouth. The fishing line is usually manipulated with a fishing rod, although rodless te ...
associations owning fishing rights on the Dee broke down. The anglers wanted to restrict the numbers of paddlers on the river when paddling was allowed but the Welsh Canoe Association wanted to renew the previous agreement. In November 2004, a protest about the lack of access on the Dee, and to rivers across England and Wales, was held in Llangollen. Following the failure of the access agreement, the Welsh Canoeing Association advises canoeists to use their own judgement about using the river, which in practice means many canoeists use the river at will from the numerous access points along its banks. Canoeing is permitted on one 100 m long rapid, 1 km upstream of Llangollen. Wildwater and slalom races are still held at Serpent's Tail rapid upstream of Llangollen. A major tributary of the Dee, the River Tryweryn, supports a wide range of water sports and hosts the Canolfan Tryweryn - the national white water centre for Wales. Each July the Chester Raft Race is held on the Dee in aid of charity. The Deva (Chester) Triathlon uses the Dee for the swim leg of the race. The rowing clubs on the Dee are Royal Chester Rowing Club (hosting also Chester University Rowing Club) and Grosvenor Rowing Club. King's School Rowing Club and Queens Park High School are school-dedicated rowing clubs. All these share the slightly meandering Chester/lower reach above the weir.


Fishing

The river has been famed as a mixed fishery with salmon and trout fishing, mostly in the upper waters and a good coarse fishery in the lower reaches. A major pollution incident in the middle reaches in the late 1990s did extensive damage to the fishery from which it is now largely recovered.


Site of Special Scientific Interest

Afon Dyfrdwy (River Dee) is a
Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...
(SSSI) in the preserved county of
Clwyd Clwyd ( , ) is a preserved counties of Wales, preserved county of Wales, situated in the north-east corner of the country; it is named after the River Clwyd, which runs through the area. To the north lies the Irish Sea, with the English cerem ...
, along the River Dee, as is the nearby River Dee (England) SSSI in England. The Dee Cliffs at Farndon, Cheshire, are designated as a separate SSSI, as are the Dee Marshes on the northern (English) side of the estuary. The river has been designated as a Special Area of Conservation because of its role as a habitat for
Atlantic salmon The Atlantic salmon (''Salmo salar'') is a species of ray-finned fish in the family Salmonidae. It is the third largest of the Salmonidae, behind Hucho taimen, Siberian taimen and Pacific Chinook salmon, growing up to a meter in length. Atlan ...
and floating water plantain.


See also

* Aerfen, the Celtic Goddess of the river. * List of crossings of the River Dee, Wales * List of SSSIs in Clwyd * " Miller of Dee", a traditional folk song


References


References

* * * * * * * * *


External links


River Dee guideDee Estuary bird lifeDee Estuary photos"The adventures of a salmon in the river Dee"
(1853) {{DEFAULTSORT:Dee Rivers of Cheshire Rivers of Denbighshire Rivers of Flintshire Rivers of Gwynedd Rivers of Merseyside Rivers of Shropshire Rivers of Snowdonia Rivers of Wrexham County Borough River navigations in the United Kingdom Sites of Special Scientific Interest in Clwyd