Swiss construction company Implenia, in a joint venture with Hochtief, has won a €90m contract from Svenska Kraftnät (Swedish National Grid) for the Anneberg-Skanstull tunnel as part of the ‘City Link’ project to help improve the electricity supply in the Greater Stockholm region.
Both companies have equal stake in the joint venture and Hochtief will take the technical lead.
The 14km Anneberg-Skanstull tunnel, the second of four phases in the ‘City Link’ project, is expected to help improve electricity supply in the Greater Stockholm region.
The tunnel has a diameter of five metres and is being built 50-100 metres below the Swedish capital using a tunnel boring machine.
As part of the project, six ventilation shafts, elevator systems and technical buildings for electrical equipment near Anneberg and around the shafts will also be constructed.
Construction is scheduled to be completed in 2024.
The ‘City Link’ project is intended to connect the north (Upplands Väsby) and the south (Huddinge) of Stockholm with a new electricity supply.
Experts from the infrastructure sector are working with the Swedish unit, Implenia Sverige, on the project.
Implenia head of business unit infrastructure René Kotacka said: “Winning this order underlines our expertise in challenging infrastructure construction and our excellent local foothold.
“Together with our partner Hochtief, we will soon be embarking on the realisation of this milestone in electricity infrastructure.”
Implenia and Hochtief will construct a 14km tunnel beneath Stockholm city centre over the next four years, which will pass under many buildings, including the University of Stockholm and the Royal Institute of Technology (KTH).
Hochtief Infrastructure Europe West executive vice president Klaus Grüttner said: “We are pleased to be able to demonstrate our tunnelling expertise once again on this new job in Sweden.
“With our partner Implenia, we are helping to expand the local grid and ensure a stable electricity supply for Stockholm.”
Implenia also has operations in the infrastructure markets in Germany, France, Austria, Sweden and Norway, in addition to building construction and civil engineering operations in Germany and Austria.
Image: Implenia, Svenska Kraftnät and Hochtief officials at the signing of contracts. Photo: Courtesy of Implenia AG.