July 2007 - London Ring Main extensions commence

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Construction to extend the London Ring Main started, with works commencing at Honor Oak to construct the first of four shafts.

Ring Main extension tunnel shaft

From May 2008 tunnelling will commence to construct two tunnels - one to the north and one to the south of the River Thames. The northern extension will run from Stoke Newington in Hackney, to New River Head in Islington.

The southern extension will run from Honor Oak to Brixton.

This massive engineering project will not only increase the size of the area served by the Ring Main but will help us meet the capital's growing demand for water.

As with construction of the original Ring Main, work will be completed using underground boring machines, thereby minimising disruption at street level.

Both extensions are due to be commissioned by March 2010.

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