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water services


Client: Three Valleys Water, U.K.

Cost: Approximately GBP£2,750,000 (Stg.)

Completion date: 2008/2009

Description: The project incorporates the provision of a new R.C. contact tank, flow chambers (inlet, outlet, splitter, divert), site pipework and ancillary works at Iver Water Treatment Plant near Slough, west of London. The construction of works, which is at commissioning stage, was carried out during the uninterrupted operation of the existing WTP, which produces 195 ml/day, supplying the surrounding areas of Slough, Windsor and Ascot. The provision of the new R.C. tank, designed by Malachy Walsh and Partners and assisted by the Hydraulics and Maritime Research Centre with a Computational Fluid Dynamic Study, when fully integrated into the existing WTP, will accommodate a 20% increased works flow of 247 ml/day. The R.C. and hydraulic design included pipework connections to the existing 1600mm diameter steel pipework to fully integrate the new tank into the works process. The design will allow the entire forward flow to the tank to be diverted back to the work inlet in the event of a disinfection (process) failure and also accommodate the existing plant hydraulic constraints such that the full design flow (247 ml/d) is achieved without causing any overflow at any point within the existing system. The construction of the project has been carried out as a Design Build Contract. The Civil Contractor is J. Coffey, London.


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