Crossrail awards contract to ship excavated material to Wallasea Island
Crossrail Media Release
Crossrail today (16th December 2011) awarded the contract to ship excavated material arising from Crossrail’s construction to Wallasea Island, Essex to create a new RSPB nature reserve to a joint venture comprising BAM Nuttall Limited / Van Oord UK Ltd.
Wallasea looking east
Image copyright Crossrail
This innovative project aims to combat threats from climate change and coastal flooding by recreating a wetland landscape. It will also help to compensate for the loss of similar tidal habitats elsewhere in England due to rising sea levels. Crossrail will provide around 4.5 million tonnes of excavated material to RSPB generated from the construction of tunnels, shafts and stations.
Andy Mitchell, Crossrail Programme Director said: “We are delighted to be working in partnership with RSPB to create a major new nature reserve that can be enjoyed for generations to come. At least two-thirds of all Crossrail excavated material will be used to create the wetland at Wallasea Island. With the award of the contract to transport excavated material, Crossrail has now awarded the last remaining major contract that will allow tunnelling to commence in spring 2012.”
Crossrail tunnelling will commence at Royal Oak in March with the first ships containing the excavated material arriving at Wallasea Island during summer 2012. The contractor will be responsible for shipping excavated material from Instone Wharf and Barking Riverside in east London and Northfleet, Kent to Wallasea Island.
Up to five ships a day will transport excavated material down the River Thames to Southend–on-Sea. They will then travel north passing Foulness Island before turning west into the River Crouch to reach Wallasea Island. The transfer of excavated material from London and Kent has been planned with the support and assistance of the Port of London Authority and the Crouch Harbour Authority.
Crossrail has also worked with the Crouch Harbour Authority to fund a major improvement to the buoyage in the area to minimise the impact on waterways connecting to Wallasea Island. Navigation buoyage between Whitaker Spit inwards and Burnham Fairway has been increased from 16 to 30 lit buoys. The new larger buoys provide better visibility and increased safety for users of the River Crouch.
Notes to Editors:
Excavated material generated from the tunnelling operations for the western tunnels (Royal Oak to Farringdon) will exit at the Royal Oak Portal and be transported by freight train to Northfleet, Kent. Excavated materials from the eastern running tunnels will be loaded onto ships directly from the tunnel conveyor surfacing at Instone Wharf on the Bow Creek. Material arising from shafts and stations will be brought by road to Crossrail’s Docklands Transfer Site at the Barking Riverside jetty.
The shortlisted bidders for the C807 Marine Transportation contract were:
- Joint Venture comprising BAM Nuttall Limited / Van Oord UK Ltd;
- Carillion Capital Projects Ltd;
- Joint Venture comprising Cemex UK Operations Ltd / Keltbray Ltd;
- Lagan Construction Ltd;
- Port of Sheerness Ltd; and
- VolkerFitzpatrick Ltd.
Tunnelling for Crossrail will produce in the region of 6 million tonnes of excavated material. The RSPB will require 10 million tonnes of excavated material to create the new 1,500 acre nature reserve - one of the largest new wetland nature reserves of its type in Europe for some 50 years. Crossrail will provide close to 4.5 million tonnes of excavated material to the RSPB.
Wallasea Island is located eight miles north of Southend-on-Sea, Essex. The excavated material will be used to raise existing land levels and also create raised areas within the existing island sea walls. These walls will later be opened up at certain locations to allow tidal water to flow in and out of the island, creating natural wetlands over time. The contractor will also be responsible for creating tidal structures within Wallasea Island to enable water levels to be precisely managed in certain areas. The C807 contract is worth in the region of £50m.
The contract (C806) to construct the jetty at Wallasea Island was awarded to BAM Nuttall. Construction of the new jetty is currently underway and will complete next year. The jetty is sized to take two ships of approximately 2,500 tonnes atthe same time.