Zaun flushes out ‘super sewer’ Lee Tunnel security scheme

The official opening of London’s new multi-million pound Lee Tunnel ‘super sewer’ has triggered the installation of high-security perimeter protection for its main access points.

Former Mayor of London Boris Johnson opened Thames Water‘s extension to the Lee Tunnel by flushing a toilet in an underground ceremony, declaring the £678 million project ‘an amazing achievement for British engineering’.

The 4.3 mile-long Lee Tunnel extension took four years to build and is designed to stop sewage flushing into the River Thames and River Lee.  It will be followed by constructing an even larger sewer, the Thames Tideway Tunnel, later this year.

Johnson said: “It is expensive, and I understand people’s concerns about that, but in the end, the real cost, it seems to me, is the cost to our city, to the environment, of not doing it.  The Victorians were very ambitious – our generation should be similarly ambitious.

“This amazing new super sewer is providing the bold infrastructure needed to support the movements of our rapidly growing city.  For years our historic Victorian systems have heaved at the seams, muddling along, battling to cope with the increasing rainfall and waste of a modern population.

“Now the River Thames will benefit from vast improvements to its water quality with less pollution and overflow.”

The access points are secured by perimeter security expert Zaun, with its most intruder-resistant product, ArmaWeave, with double-leaf gates.

It is being installed by Zaun subsidiary Binns Fencing, who are working with main contractor MVB, a joint venture comprising Morgan Sindall, VINCI Construction Grands Projects and Bachy Soletanche.

ArmaWeave’s unique properties add substantial resistance to cutting attacks with hand, powered and non-contact tools. In addition, the tight mesh pattern provides no climbing aids, again limiting the potential for intrusion.

On average, 39 million tonnes of untreated sewage mixed with rainwater gets discharged into the River Thames from overloaded treatment works and combined sewer outfalls every year.

At Abbey Mills pumping station, the biggest of these outfalls has been discharging 16 million tonnes of sewage per year to the River Lee.

The £678 million Lee Tunnel – the largest single project in the history of the privatised water industry in England and Wales, and the deepest ever bored under London at 75 metres deep – will capture this sewage to keep it out the River Lee.

The Lee Tunnel connects the Abbey Mills Water Treatment Centre to Beckton Sewage Treatment Works, Europe’s largest such site, both of which are also secured by Zaun perimeter protection.

The Thames Tideway Tunnel will connect to the Lee Tunnel and capture sewage from the remaining 34 combined sewer overflows, keeping it out of the River Thames.

About Zaun

Zaun is the only in-house British Manufacturer of Woven and Welded Mesh Fencing Systems. For 27 years, they have been the trusted manufacturing partner for sports and physical perimeter security. With a wide range of fencing, gate, and HVM solutions they can offer Protection Through Innovation for your next project.

Located in the West Midlands, they are a privately owned company first formed in 1996 and continuing to promote British manufacturing on the world stage. A proud member of Made in Britain and Made in the West Midlands, Zaun has worked on numerous projects around the world from Border Security and Airports, to Sports and Critical National Infrastructure.

The continued investment in their manufacturing processes and systems has enabled the latest in problem-solving and innovation. At the same time, an approach to ‘The Right People in the Right Places’ puts the customer experience at the heart of their business.

The quality of their wide range of systems is assured through ISO 9001 and third-party certification for high-security and HVM solutions including LPS 1175, Secured by Design, Approved for UK Government Use (NPSA), and PAS 68.

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