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Key milestone reached in Thames Water Ring Main extension

Morgan Est has reached a key milestone in its £38M contract to extend the Thames Water Ring Main with a successful tunnel breakthrough at Brixton.

TBM Helen breaks through on Thames Water southern Ring Main extension beneath Brixton

The event happened yesterday when Tunnel Boring Machine (TBM) Helen broke through at the Brixton shaft. The new 4.8km tunnel will link the existing Brixton Thames Water Ring Main pump out shaft with Honor Oak Reservoir, carrying 200Ml of potable drinking water per day.

The project required the construction of two of the deepest jacked caisson shafts ever engineered by Morgan Est. In addition 4,000 tunnel rings were built and approximately 48,500m³ of chalk, clay and sand was excavated, removed from the site and recycled.

Work is scheduled for completion in Spring 2010.



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