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First Connection to Main Tunnel Complete

First Connection to Main Tunnel Complete

The outer edge of London's new super sewer is visible for the first time after a connection tunnel to the main tunnel was completed. 

The 10m tunnel was built between Tideway's site along Albert Embankment using a sprayed concrete lining method from within the site's 50m deep shaft.

The exterior of the segments being used to line the main tunnel are now visible; however the team will not break through into the main tunnel until the tunnel boring machine (TBM) being used to dig the main tunnel, Ursula, has completed her journey to Tideway's Chambers Wharf site in Bermondsey. 

The Albert Embankment site is the first site to connect to the main tunnel through its own permanent structures. 

The 25km main tunnel is being dug underneath the River Thames by four giant tunnelling machines. Ursula, named after Dr Audrey 'Ursula' Smith, was launched eastbound from Tideway's Kirtling Street site in Battersea early last year and is currently approaching Blackfriars.