As contractors start mobilizing to drive Crossrail’s twin tunnels, work on the railroad’s $795-million station at the Canary Wharf commercial district in east London is powering ahead. The six-floor-deep station is the largest of Crossrail’s nine.
Top-down construction is forming the station along the River Thames. The structure will extend 25 meters below the water level. Construction within a watertight cofferdam is scheduled to greet tunnel-boring machines in summer 2012.