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Mogden Sewage Treatment Works
Mogden Sewage Treatment Works is a sewage treatment plant in the Ivybridge section of Isleworth, West London, formerly known as Mogden. Built in 1931–36 by Middlesex County Council and now operated by Thames Water, it is one of the largest sewage works in the United Kingdom. It treats the waste water from about 1.9 million people served by three sewers in North and West London. The plant has been extended and upgraded several times, most recently in 2011–13, and now covers .
==History==
The plant was built in 1931–36 for £1.7 million by Middlesex County Council, replacing 28 small sewage treatment facilities as part of the West Middlesex (Mogden-Perry Oaks) Main Drainage Scheme.〔Philip Howard, ''London's River'', London: Hamilton, 1975, ISBN 9780241892374, (p. 223 ).〕〔''Bird Notes'' 26–28 (1954) (144 ).〕 The council purchased Mogden Farm for the purpose after the public objected to the proposed site in Syon Park.〔''The Municipal Journal and Public Works Engineer'', 28 August 1936, (p. 1670 ).〕 of sewers were built to connect to it,〔''Environmental Accomplishments to Date: A Reason for Hope: International Symposium II, July 16-18, 1974'', ed. George M. Dalen and Clyde R. Tipton, Jr., The Environmental symposium series, Columbus, Ohio: Battelle Memorial Institute, (), , (p. 50 ).〕 and the Duke of Northumberland's River was diverted to flow through it as a source of coolant.〔(Mogden ), Hidden London, retrieved 12 November 2013.〕 The plant began operations in late 1935〔"Discussion of the Effect of Synthetic Detergents", The Institution of Civil Engineers, ''Proceedings'' 6 (1957) (398 ).〕 and was formally opened with the rest of the scheme on 23 October 1936 by the then Minister of Health, Sir Kingsley Wood.〔Philip T. Sherwood, ''Heathrow: 2000 Years of History'', Stroud: Sutton, 1999, ISBN 9780750921329, (p. 33 ).〕 In its first year of operation it treated an average of 60,020,000 gallons of sewage per day.〔''Applied Chemistry Reports'' 23 (1938) (774 ).〕
The works were expanded in 1962, 1989 and 1991 and upgraded in 1996–2002. The most recent expansion, in 2011–13, increased the treatment capacity by more than half and increased the plant's size by , as part of the Thames Tideway Scheme to improve water quality in the River Thames. It was completed in summer 2013.〔Alix Culbertson, ("£140m upgrade of Mogden Sewage works complete" ), Get West London, 9 May 2013.〕〔Maureen Gaines, ("Thames Water opens upgraded Mogden STW" ), Water & Wastewater Treatment, 26 June 2013.〕
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