The Prescott Channel was built in 1930–35 as part of a flood relief scheme for the

River Lee Navigation The Lee Navigation is a canalised river incorporating the River Lea (also called the River Lee along the sections that are navigable). It flows from Hertford Castle Weir to the River Thames at Bow Creek; its first lock is Hertford Lock and i ...

in the

East End of London The East End of London, often referred to within the London area simply as the East End, is the historic core of wider East London, east of the Roman and medieval walls of the City of London and north of the River Thames. It does not have un ...

, England, and was named after Sir William Prescott, the then chairman of the Lee Conservancy Board.''Notes and News''
(April 2007) (Greater London Industrial Archaeology Society) Rubble from the demolished

Euston Arch The Euston Arch, built in 1837 (and demolished in 1962), was the original entrance to Euston station, facing onto Drummond Street, London. The arch was demolished when the station was rebuilt in the 1960s, but much of the original stone was later ...

was used in 1962 to improve the channel, which forms part of the Bow Back Rivers.

Details

Three Mills Lock Three Mills Lock, also known as the Prescott Lock is a lock on the Prescott Channel on the River Lea in London. The project was led by British Waterways and the lock officially opened on 5 June 2009. The lock cuts off this section of the ...

is a lock in the channel to allow passage of freight for the London 2012 Olympics by a process of canalisation (with the result of stopping the tidal flow) on the channel and the River Lee northwards. It was constructed between March 2007 and June 2009. The project was credited with offering additional benefits:- "As well as helping barges carrying construction materials and recyclables between Stratford and the River Thames, the lock will also create new opportunities for leisure boats, water taxis, trip boats and floating restaurants." A major benefit for British Waterways was the increased value of the land which it holds in areas no longer subject to flooding, which it was expected would exceed the cost of the project. The lock is 62 metres long, 8 metres wide and 2.4 metres deep, and can hold two 350 tonne barges (other locks on the Lower Lee limited barges to about 120 tonnes). It was designed by Tony Gee and Partners and built by Volker Stevin. On 2 June 2008, work on the channel brought up a '' Hermann''

Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

time bomb. Residents were evacuated, tube and rail services were disrupted, and flights from

London City Airport London City Airport is a regional airport in London, England. It is located in the Royal Docks in the Borough of Newham, approximately east of the City of London and east of Canary Wharf. These are the twin centres of London's financial ...

were curtailed during the emergency. The 67-year-old, booby-trapped bomb was finally made safe, after five days, in a controlled explosion that threw 400 tonnes of sand into the air. Major Matt Davies, of the Army Bomb disposal unit said "If it had gone off in wartime there would have been large fragments up to a mile away which could have destroyed buildings and sewers". He added "This is the biggest unexploded bomb we have found in central London." In 2009, again as part of the project to build the lock, 29 stones from the Euston Arch were raised from the river bed and presented to the Euston Arch Trust. One stone had already been salvaged in 1994 by Dan Cruickshank, as part of a

BBC Television BBC Television is a service of the BBC. The corporation has operated a Public service broadcasting in the United Kingdom, public broadcast television service in the United Kingdom, under the terms of a royal charter, since 1927. It produced t ...

programme called ' One Foot in the Past'.

Criticisms of Canalisation

Three Mills Lock was delivered ten months behind the planned schedule, which severely limited its usefulness to the builders of the various Olympic Park venues. A further planned use was for the delivery of materials for the

Crossrail Crossrail is a railway construction project mainly in central London. Its aim is to provide a high-frequency hybrid commuter rail and rapid transit system crossing the capital from suburbs on the west to east, by connecting two major railway ...

project. However the lock has in fact rarely been used by freight barges. In August 2013, a long period of hot dry weather followed by heavy rain washed polluted road run-off water into the Lower Lea, causing deoxygenation of the water. The role of the canalisation of the Bow Back Rivers in and around the Olympic Park, with its consequences for tidal flow have been implicated in the considerable levels of fish kill which resulted from the incident.Fish killed in the River Lea. Pushed to their limits by environmental mismanagement
(Martin Slavin, Gamesmonitor, July 2013) accessed 11 August 2013.

References

Other sources

* East London Record. No. 18 (1996)

External links

British Waterways Prescott Channel FLICKR group £15m sluice system is Prescott's watergate

Geo Links for Prescott Channel