LEE TUNNEL – TECHNICAL SUPPORT

Z-Tech has recently worked with the main contractor and a key equipment supplier during the commissioning stage of the Lee Tunnel: the first of two tunnels built to prevent around 39 million tonnes of untreated sewage mixed with rainwater being discharged into the tidal River Thames each year from combined sewer overflows built over 150 years ago in Victorian London.

The 6.9km long tunnel goes beneath London’s Borough of Newham, from Abbey Mills Pumping Station to Beckton Sewage Treatment Works.

Z-Tech commissioned the major pumping systems: optimising performance, analysing instrumentation variables and vibration analysis; while also supplying systems engineers, working on: software, process optimisation and network architecture.

The Lee Tunnel alone represents some £678m investment by Thames Water, and will transfer almost half of London’s storm water overflows.

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"The customer focus and flexibility of Z-Tech makes it easy for a water utility to deal with. When we have a large and complex programme to deliver, planning every detail can be a challenge. Working with Z-Tech means that we can maintain delivery, knowing that resources are available to pick up the loose ends."

Jim Grandison, Thames Water

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