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Implenia lands deep and complex Norwegian tunnel project

The large and complex tunnelling system at approximately 230m below sea surface (Norconsult/Norwegian Public Roads Administration)
Swiss tunnelling specialist Implenia (77%) and Norwegian engineer Stangeland Maskin (23%) have won a $600m road tunnelling project under an island in southern Norway.

The complex Rogfast scheme consists of a two-way tunnel 8.8km long with a 10.5m cross-section some 230m beneath the island municipality of Kvitsøy.

The two companies will provide the complete interior finishing, technical buildings, ventilation shafts and pumping stations for the tunnel. There will also be ramps and roundabouts, 1.6km of road along with two bridges.

Excavated material will be used to create a land extension for a commercial area.   

Implenia is already building the E03 Boknafjord tunnel together with Stangeland Maskin, which means that the two companies will be responsible for around 70% of the Rogfast project.

Erwin Scherer, global head tunnelling at Implenia, commented in a press statement: “We are proud to be chosen for this important project together with our JV partner Stangeland Maskin. E02 Kvitsøy is another complex tunnelling project and therefore fits perfectly with our strategy. We will contribute our vast expertise in tunnelling, concrete as well as water and frost proofing.” 

The contract between Implenia, Stangeland Maskin and the Norwegian Public Roads Administration is scheduled to be signed after the objection period ends on 7 June. The work will start in late summer and is planned to be completed in 2030.

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