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Sirius Minerals begins excavation on mineral transportation tunnel

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World Fertilizer,

Tunnelling has begun on Sirius Minerals’ 23-mile underground mineral transportation system at Wilton International on Teesside, UK.

The tunnel will convey up to 20 million tpy of polyhalite ore, a natural mineral used as fertilizer, from the company’s new underground mine near Whitby, to a new processing and shipping facility on the River Tees for distribution around the world.

The company expects to export £2.5 billion worth of fertilizer every year at full capacity from a new purpose built processing plant and port in the shadows of the old Redcar Steelworks, creating 1000 direct long term jobs. Sirius expects to strike first polyhalite in 2021 and be producing 10 million tpy by 2024.

“The start of the tunnelling marks another major milestone for this world class project,” said Chris Fraser, CEO of Sirius Minerals. “We’ve made great progress this year already, having broken ground here on Teesside in the summer and made great strides with the construction of Woodsmith Mine.”

The first 125 m of the tunnel will be created with traditional tunnelling methods, before a tunnel boring machine (TBM) takes over for the rest of the 8 mile drive from Wilton. Two more tunnel boring machines will be lowered into the ground at the mine and an intermediate site to drive the remaining 23 miles. The underground transportation system, linked to the mine, was chosen to avoid impacting the surface landscape of the local area.

“We are very proud of our innovative, low impact sustainable design, which has been part of the project’s DNA from day one,” said Fraser. “We are selling a unique, multi-nutrient fertilizer that can make a significant positive difference to farming practices and agricultural sustainability around the world. So it’s important that the project design delivered innovation and sustainability, giving us a world class project that the country can be proud of.”

A small ceremony took place at the site prior to the tunnel portal breakthrough to mark St Barbara’s day, the patron saint of miners and tunnellers. Cllr Sue Jeffrey, Leader of Redcar and Cleveland Borough Council, sounded a horn to mark the start of excavation. Cllr Jeffrey has agreed to act as the patron of the tunnel, a traditional ceremonial role in the industry, which oversees the welfare of all who are working underground.

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