Barhale chosen for £36m London sewer refurb

The northern outfall sewer passes over the Jubilee Line, DLR and Manor Road

The northern outfall sewer passes over the Jubilee Line, DLR and Manor Road

The northern outfall sewer (NOS) at Manor Road, West Ham, is a a 7.5km-lengthy wastewater pipeline running across East London transferring flows from a 300km3 catchment to Beckton Sewage Remedy Works.

It passes above the Jubilee Line, Dockland Mild Railway and Manor Road.

The NOS is made up of 5 separate parallel sewer ‘barrels’. Three have been on the starting up constructed by Sir Joseph Bazalgette between 1860 and 1865; the totally different two have been added spherical 60 years later. Every of the sewer barrels is 2.7m in diameter.

Works are constrained by the must comprise flows thru the sewer for the length of the programme and to minimise disruption to prepare high-tail.

Destroy water passes thru the pipes at a blended rate of bigger than 22,000 litres per 2d, which manner that over-pumping is now not feasible.

As an different, Barhale will make use of a chain of in moderation-phased isolations with no bigger than two sewers taken out of service at someone time.

Once the sewers are isolated, Barhale will strengthen the unusual construction with a particularly-designed duplex stainless steel pipes.

Barhale’s senior contracts manager Jaimie Lawson explained that the company is working closely with Thames Water to function a phased means:

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“We are shaping the programme to enable sewer flows to proceed for the length of the works whereas averting rail possessions and disruptions to avenue site site visitors,” he talked about.

“Even though the NOS is a most indispensable portion of London’s water infrastructure, it’s miles presumably less neatly acknowledged that it also forms the mattress for the in vogue Greenway footpath and we must make certain that we minimise any impacts on the community.” 

Barhale plans to use stainless steel pipework fabricated offsite to take hold of the necessity for on-establish welding and web distinct the high ranges of quality and precision required.

The contractor will also watch the condition of the solid-iron pipe and hangers that suspend the sewers over Manor Road ahead of change or refurbishment.

Shane Gorman, Barhale’s water director for the southern dwelling, talked about: “The northern outfall sewer affords a necessary move across the capital and guaranteeing it’s miles in a dwelling to proceed to help the communities of North East London is most indispensable.

“We are very chuffed to be working alongside Thames Water to negate this crucial portion of labor, connecting to the Thames Tideway Tunnel and contributing to the total change of the capital’s water infrastructure.”

The project is anticipated to lengthen the lifetime of the sewer for every other 120 years. Completion is anticipated in summer 2027.

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