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Costain Civil Engineering has got just a single 24-hour M1 closure to remove an original Sir Owen Williams reinforced concrete bridge over the motorway between Derby and Nottingham.

Work starts in eight days and already abutment embankments have been cut back and most of the bridge concrete removed before piers are hydraulically burst and the final steel cut.

The deck will then be supported on multi-axle trailers supplied by Econofreight. These computer-controlled vehicles will rotate the three section hinge design bridge and move it off site to be broken up.

The whole operation has been planned to the last detail, said Costain project manager Paul Grange this week. 'We had 54 hours in the contract but agreed with the Highways Agency to cut that back.'

The work is part of the £9.6M Derby Southern Bypass Contract B. Owen Williams is the design engineer.

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