Premier Construction

Deephams Sewage Works London

Written by Roma Publications

Deephams Sewage Works

Work is now complete on an award-winning £250 million sewage treatment works upgrade designed to boost river quality, reduce odour and cater for predicted population growth.

Deephams sewage works, in Picketts Lock Lane, north London, treats the wastewater from around one million customers in the area and the three-year upgrade had to be carried out without disrupting essential day-to-day operations.

Earlier this year the works won the prestigious ‘Greatest Contribution to London’ trophy at the ICE London Civil Engineering Awards last night. Thames Water’s £250 million Deephams upgrade was recognised for its creative, sustainable and innovative thinking at the capital’s Institution of Civil Engineers Awards, which celebrate outstanding civil engineering achievement and ingenuity in London.

Each day, Deephams deals with more than 200,000 tonnes of waste water, although this can rise to above one million tonnes during periods of heavy rain.

The upgrade to the works, which serves one million people, has increased renewable energy generation on site from a new combined heat and power plant and reduced the carbon footprint of the works by a third. During the three-year project there was no impact on service to Thames Water’s customers or treated effluent to the environment.

The changes have seen the quality of treated water returned to the River Lea, a tributary of the Thames, significantly improved while there is also a 99 per cent reduction in odour emissions, achieved by covering key parts of the works.
Martin Hoff, Thames Water’s head of major projects, said:

“We’re all incredibly proud of the upgrade to Deephams. While many of the customers it serves may not have noticed anything while the work was taking place, it is going to make a big difference now and for the future.
“As a result of our investment, the site is now more sustainable and ready for the future challenges of population growth and climate change.”

Reflecting on the award success, he added:
“We’re delighted and honoured that our complex engineering work has been recognised by the ICE and this prestigious award. Rebuilding and upgrading a live works could not have been achieved without the teamwork and collaboration developed and honed with our partners AMK throughout the project.

“Our aim was always to contribute a sustainable and innovative upgrade for the benefit of Londoners and we’re very proud to have achieved this.”

Deephams won ahead of Chiswick Park footbridge, Coal Drops Yard, Hackney Wick station redevelopment, Meridian Water Station, Terminal 3 Flight Connections Centre, Heathrow Airport, Thames Estuary Asset Management 2100, University College London Student Centre, Victoria Station upgrade and Woolwich Ferry new berths.

Judges were impressed by the emphasis on sustainability practises, including the reuse of clay and gravel in earthworks and the recycling of demolished concrete to help support new structures, and “exceptional” level of teamwork to deliver complex technical solutions.

Jonathan Baggs, ICE London director, commented:
“In a year which the ICE is highlighting the need to protect water and improve our resilience as a society, I am delighted that the Deephams project team were recognised with the Greatest Contribution to London.
“The project shows the exceptional work of civil engineers, using innovative design and construction, to overcome the complexity of upgrading this important piece of infrastructure and safeguarding it for future generations.”

The Deephams project was delivered by Thames Water’s collaborative relationship with the AMK Joint Venture comprising of AECOM, J Murphy and Sons and Kier Infrastructure, on time and to budget.

Addressing the importance of the project for the local area Councillor Nesil Caliskan, leader of Enfield Council, said:
“Thames Water’s investment in this incredibly important plant not only supports Enfield’s residents and businesses, but will continue to support the ongoing growth and future demand we expect to see in the borough. In addition, the significant modernisation to the infrastructure will, in short, improve the environment and quality of life for those living in the immediate catchment area.

“I would also like to applaud the close cooperation of Thames Water and the Enfield Council (Development Management Team) throughout the planning of this key infrastructure improvement project.

“It’s my desire that all Enfield residents have decent, well-connected places to live in and this investment of £250m by Thames Water will make a marked contribution to this aim.”


Alpha Plus Limited

Alpha Plus Ltd specialises in the 3D design, manufacture and installation of pipework systems and structural steelwork. The company has been providing these services to the utility, waste management, industrial, commercial and manufacturing sectors since 1988.

Alpha Plus Ltd is committed to providing clients with innovative, cost effective and high-quality solutions. It works closely with clients providing design, fabrication and installation to a high-quality using approved standards and up-to-date technologies.

During its time in operation Alpha Plus Limited has built a strong industry reputation and has worked with a number of respected clients, including AECOM, Laing O’Rourke, Morgan Sindall, Galliford Try and JN Bentley. Previous projects include Davyhulme STW, Newark STW, Frankley WTW and Failsworth WTW.

The company was recently involved with phases 1 and 2 of the upgrade to Deephams sewage works. It was also involved with the site’s Tertiary Treatment Plant as the mechanical contractor for AMK.

Gareth Lindley, Alpha Plus Ltd, commented:
“It was important to be involved with this project to showcase our capabilities and experience. As a company we take great pride in the quality of our service, our 3D modelling and design capabilities and our collaboration and co-operation with clients.”

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