LEEweigh commissions beltweighers at Cross Rail Facility
Clay, chalk, sand and gravel taken from the construction of Crossrail will be transferred by ship to Wallasea Island, which the RSPB will transform into 1,500 acres - nearly 2.5 square miles - of tidal wildlife habitat.
The agreement links Europe's largest construction project with the continent's biggest wetland creation scheme.
The excavated material is first taken to a depot on the site of the old Barking Power Station where it is weigh loaded onto a 2000 tonne vessel. From here it is transported to Wallasea where it is offloaded and weighed again before being used on the wildlife reserve.