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Skanska JV wins Humber power tunnel deal

National Grid has awarded the contract for construction of the Humber Tunnel gas pipeline to a joint venture of Skanska, Porr and A Hak.

The £100M contract will see the partners construct what is believed to be the longest gas pipeline tunnel in the world.

The 5km tunnel beneath the River Humber will run from Paull to Goxhill and carry a high pressure gas pipeline which will replace an existing immersed pipeline. Skanska has said that design and construction of the tunnel will take three years to complete.

“This pipeline will be the longest gas pipeline in a tunnel, inserted in a single string in the world,” said National Grid senior project manager Phil Croft. “To do this we need partners with experience and a proven track record and Skanska, Porr and A Hak were able to demonstrate their expertise and knowledge throughout the tender process, giving us the confidence that this was the right company to build this tunnel and pipeline in such an environmentally sensitive and commercially busy river.”

The new tunnel is needed to replace the existing immersed pipeline because tidal patterns of the River Humber have eroded the river bed covering the existing pipeline, leading to parts of it being at risk of being exposed.

The River Humber pipeline is part of the national transmission system – connecting the import terminal at Easington, on the East Yorkshire coast, to the wider network and delivering gas to millions of customers throughout the UK. Planning consent for the scheme has yet to be awarded but is expected in September.

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