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Raised chambers housing flow gauges for London’s new multi-million pound ‘super sewer’ have been secured with Zaun's intruder-resistant turret tops.
On average 39 million tonnes of untreated sewage mixed with rain water gets discharged into the River Thames from overloaded treatment works and combined sewer outfalls every year. The biggest of these outfalls, at Abbey Mills pumping station, has been discharging 16 million tonnes of sewage per year to the River Lee.
The Lee Tunnel, connecting the Abbey Mills Water Treatment Centre to Beckton Sewage Treatment Works, Europe’s largest such site, was designed to stop sewage flushing into the River Thames and River Lee.
It is 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,
The £678 million, 4.3 mile-long tunnel took four years to build and it was opened earlier this year.
Perimeter security expert Zaun designed two bespoke ‘cages’ using ArmaWeave woven mesh high-security fencing with special fixings and topped with 980 razor coil to protect the flow gauge chambers.
Zaun had already secured the access points to the tunnel extension with ArmaWeave, its most intruder-resistant product, which was installed by subsidiary Binns Fencing.
The Tunnel perimeter is also secured by Zaun perimeter protection.
Zaun’s ArmaWeave woven mesh high-security fencing has been designed specifically to be installed on sites of critical national importance (CNI).
ArmaWeave adds substantial resistance to cutting attacks with hand, powered and non-contact tools. The tight mesh pattern provides no climbing aids, again limiting the potential for intrusion.