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Design and construction methods had to be vetted by London Underground, Railtrack and the Environment Agency before piling could start for the £26M Hungerford pedestrian bridge across the Thames. Westminster City Council project director Gareth Hardwick explained that river walls, active rail lines and two underground lines cross below the river at this point, some as close as 10m to the work. Some 50 or so bored piles, up to 1.6m in diameter, are being driven both upstream and downstream of the five main piers. Another 50 or so smaller piles will form temporary works and a casting yard for the six-span precast, prestressed concrete launched decks. The scheme will create a cable-stayed footway on either side of the existing Victorian railway crossing into Charing Cross station. The project is being managed by consultant WSP and built by a Costain/Norwest Holst joint venture using Taylor Woodrow's jack-up barge to pile up to 40m below river bed.

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