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Thames Water has completed a 1.2km long tunnel in the Holland Park area of London as part of a £10M scheme to reduce the likelihood of pipe bursts. Lovat tunnel boring machine Helen broke through the wall of a specially built shaft at Campden Hill reservoir last week after driving up to 25m a day. Two new water mains will now be installed inside the 2.9m internal diameter tunnel to replace the 12 existing mains beneath Holland Park Avenue. The scheme is due for completion in December 2001 and should cut leakage in the area by 650,000 litres a day.

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