Strabag awarded contract for Sirius Minerals’ North Yorkshire polyhalite project
The Woodsmith Mine will begin extraction from the world’s largest deposit of polyhalite, a mineral used in the production of fertilizer, in 2021.
The section to be built by Strabag is part of a 37 km tunnel with a diameter of 4.7 m for an environmentally friendly conveyor system to transport the mined polyhalite to Wilton for processing. The Strabag contract also includes the construction of a tunnel ramp as well as the tunnel portal at Wilton.
The actual tunnelling works will cover the distance from the Wilton portal to a shaft at Lockwood Beck, with 150 m to be built via cut-and-cover construction, 800 m through conventional tunnelling and 11,900 m using a tunnel boring machine. Site mobilisation is to begin immediately.
The project is currently the second tunnelling project for Strabag in the United Kingdom. The company is part of a consortium that last year was awarded two lots for the HS2 high-speed rail line. ■