CROSSRAIL � WEST DRAYTON STATION Client: Hochtief Value: £700,000 Location: West Drayton Groundworks � Pile excavation and breakdown for northern staircase and footbridge. � Excavation, temporary works, and reinforced concrete works for lift pit, retaining walls, pile caps and slabs. � Installation of subsurface drainage and ducting � Construction of concrete stairs between northern extension and link � All brickwork and blockwork cavity wall to the southern façade of the northern extension building. � All blockwork cavity wall to stone rainscreen clad walkway to northern lift � All internal blockwork walls including in plant rooms and existing ticket hall. � All movement joints, DPC, waterproofing, insulation, and sealants to complete the above walling systems. � Installation of attenuation tank � Platform subsurface drainage installation and connection to existing (nightshift work)