Kier wins £66m sewage works upgrade

Thames Water has appointed Kier to design and build a £66m upgrade of its Mogden sewage treatment works (STW) in Isleworth, west London.With Aecom as its consulting engineer, Kier will upgrade existing tanks and build new ones, replace mechanical and process equipment and upgrade electrical panels.The project is designed to increase the capacity of preliminary treatment and improve the resilience of the sludge and digester streams at Mogden in preparation for AMP8 works.Mogden, built in the 1930s, is Thames Water’s third largest treatment works, spanning 55 hectares and serving around 2.1 million people.At the 50-year-old Deephams wastewater treatment works in Edmonton, north London, Kier delivered an upgrade without expanding the site footprint or interrupting the daily flow of sewage.Kier secured a place on Thames Water’s £2.6bn AMP7 capital programmes framework last year. It has also provided planned and reactive services through the Infrastructure Alliance.