Small Dean Viaduct
The viaduct will take the route across the A413, the Chiltern Railway Line and Small Dean Lane. It will be 350 metres long and take two years to construct. The main compound will be in place for over four years. Road Barn Farm has been demolished along with three associated outbuildings. National Grid overhead power lines have been diverted via three new pylons. PRoW Wen 57/1 will be closed during construction before being reinstated along its original alignment. A conveyor system will take spoil across the A413, the Chiltern Railway and Small Dean Lane.