The Lee Valley Reservoir Chain is located in the

Lee Valley The Lea Valley, the valley of the River Lea, has been used as a transport corridor, a source of sand and gravel, an industrial area, a water supply for London, and a recreational area. The London 2012 Summer Olympics were based in Stratford, in ...

, and comprises 13 reservoirs that supply drinking water to

London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...

. The Reservoir Chain is a major geographic constraint; together with the

Thames The River Thames ( ), known alternatively in parts as the River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the R ...

it is one of the two significant topographic features that divide the capital and define the communities on either side. The

Lower Lea Valley The Lower Lea Valley is the southern end of the Lea Valley which surrounds the River Lea. It is part of the Thames Gateway redevelopment area and was the location of the 2012 Summer Olympics. A 2005 documentary ''What Have You Done Today, Mer ...

, downstream of the reservoirs, is more integrated, with better east–west transport connectivity.

Geographic significance

Aerial view of Walthamstow Reservoirs from the north

The Chain separates the London Boroughs of

Haringey The London Borough of Haringey (pronounced , same as Harringay) is a London borough in North London, classified by some definitions as part of Inner London, and by others as part of Outer London. It was created in 1965 by the amalgamation of ...

and

Enfield Enfield may refer to: Places Australia * Enfield, New South Wales * Enfield, South Australia ** Electoral district of Enfield, a state electoral district in South Australia, corresponding to the suburb ** Enfield High School (South Australia) ...

to the west, from

Waltham Forest The London Borough of Waltham Forest () is a London borough in north-east London, England. Its population is estimated to be 276,983 in 2019. It borders five other London boroughs: Enfield to the north-west, Haringey to the west, Hackney to t ...

and

Essex Essex () is a Ceremonial counties of England, county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the Riv ...

in the east. The corridor includes 13 reservoirs, two to three channels of the

Lee Lee may refer to: Name Given name * Lee (given name), a given name in English Surname * Chinese surnames romanized as Li or Lee: ** Li (surname 李) or Lee (Hanzi ), a common Chinese surname ** Li (surname 利) or Lee (Hanzi ), a Chinese ...

, as well as marshes and parkland, up to a mile wide. During WWI, the settlements on both sides of the Lea were badly hit by Germany Army and Navy airship raids. It is believed the crews mistook the Reservoir Chain for the Thames and released their bombs on what they took to be central London. The Boundary Commission treats the Thames and Lea as natural barriers within London. When reviewing the boundaries of London's parliamentary constituencies, it concludes that any constituency spanning either river would be artificial and not reflect local communities or identities. The 2018 review compromised on this, allowing a cross-Lea constituency further south, in the Lower Lea where the communities on each side are more integrated due to greater quantity and quality of the road and rail links across the valley. The corridor is part of the

Metropolitan Green Belt The Metropolitan Green Belt is a statutory green belt around London, England. It comprises parts of Greater London, Berkshire, Buckinghamshire, Essex, Hertfordshire, Kent and Surrey, parts of two of the three districts of Bedfordshire and a s ...

and its national and international significance for wildlife is reflected by SSSI,

Ramsar Ramsar may refer to: * Places so named: ** Ramsar, Mazandaran, city in Iran ** Ramsar, Rajasthan, village in India * Eponyms of the Iranian city: ** Ramsar Convention concerning wetlands, signed in Ramsar, Iran ** Ramsar site, wetland listed i ...

and SPA designations. Lying between some of Londons's most densely populated areas, the Reservoir Chain and associated open land provides a highly valued ecological, landscape and recreational resource for the people of

north North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north ...

and

east East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fac ...

London.

Reservoirs

The following waters are located in the

London Borough of Enfield The London Borough of Enfield () is a London borough in North London. It borders the London boroughs of Barnet to the west, Haringey to the south, and Waltham Forest to the southeast. To the north are the districts of Hertsmere, Welwyn Hat ...

and are known collectively as the

Chingford Reservoirs The Chingford Reservoirs are the King George V Reservoir and the William Girling Reservoir, which form part of the Lee Valley Reservoir Chain in the London Boroughs of London Borough of Enfield, Enfield and London Borough of Waltham Forest, Walt ...

, which are 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 ...

: *

King George V Reservoir The King George V Reservoir, also known as King George's Reservoir, is located in the London Borough of Enfield and is part of the Lee Valley Reservoir Chain that supplies London with drinking water. The storage reservoir is bordered by Sewardsto ...

William Girling Reservoir The William Girling Reservoir is located in the London Borough of Enfield and is part of the Lee Valley Reservoir Chain that supplies London with drinking water. It is named after William Girling OBE, a chairman of the Metropolitan Water Board (M ...

The following waters, together known as the

Walthamstow Reservoirs Walthamstow Wetlands is a nature reserve in Walthamstow, east London, adjacent to the historic Essex-Middlesex border on the River Lea. It is focused on the Walthamstow Reservoirs, built by the East London Waterworks Company between 1853 and ...

, are located in the

London Borough of Waltham Forest The London Borough of Waltham Forest () is a London boroughs, London borough in north-east London, England. Its population is estimated to be 276,983 in 2019. It borders five other London boroughs: London Borough of Enfield, Enfield to the nort ...

and, with the exception of one, form a

: * Lockwood Reservoir * High Maynard Reservoir * Low Maynard Reservoir *

East Warwick Reservoir East Warwick Reservoir is located in the London Borough of Waltham Forest at Walthamstow. The storage reservoir is part of the Lee Valley Reservoir Chain and supplies drinking water to London. The reservoir is owned by Thames Water. History Th ...

West Warwick Reservoir West Warwick Reservoir is located in the London Borough of Waltham Forest at Walthamstow. The storage reservoir is part of the Lee Valley Reservoir Chain, which supplies drinking water to London. It is owned by Thames Water. History The reserv ...

* Unnamed reservoirs numbered 1 to 5 *

Banbury Reservoir Banbury Reservoir is located in the London Borough of Waltham Forest at Walthamstow. It is one of the storage reservoirs in the Lee Valley Reservoir Chain. The reservoir is owned by Thames Water. History The reservoir, which was completed in 1 ...

(The only reservoir that is not part of a SSSI) The reservoirs have the following characteristics:

Water supply

The reservoirs are fed by the following waters: *

River Lee Diversion The River Lee Diversion is located in the Lea Valley, close to Enfield Lock and to the north east corner of the King George V Reservoir. History As its name implies, the River Lea was diverted to accommodate the construction of the Chingfor ...

River Lee Flood Relief Channel The Lee Flood Relief Channel (FRC) is located in the Lea Valley and flows between Ware, Hertfordshire, and Stratford, east London. Work started on the channel in 1947 following major flooding and it was fully operational by 1976. The channel in ...

* New River * The Thames-Lee Water Main

Water treatment

After being stored in the above reservoirs the water is piped to the

Coppermills Water Treatment Works The Coppermills Water Treatment Works is a large water treatment works in the Lea Valley in east London. Completed in 1969 by the Metropolitan Water Board, it is now owned and operated by Thames Water. In 2009, Coppermills was connected to the Th ...

to be treated. In 2006 a smaller water treatment works was also built at Chingford at the edge of the William Girling and King George V reservoirs.

References

{{authority control Thames Water reservoirs Reservoirs in London

Geographic significance

Reservoirs

Water supply

Water treatment

See also

References