A joint venture of Swiss construction firm Implenia and HOCHTIEF has secured a €580m contract from Deutsche Einheit Fernstrassenplanungs und -bau (DEGES) for the A7 Altona tunnel in Hamburg, Germany.

Under the contract, the JV will be responsible for the construction of a 2.2km-long Altona noise protection tunnel on the A7 motorway in Hamburg.

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Hochtief with a 65% share in the joint venture will take the technical lead, while Implenia will take the commercial lead on the eight-year project, which is scheduled to commence in April this year.

The Swiss company said that the expansion of the motorway to eight lanes between the Hamburg-Othmarschen and Hamburg-Volkspark junctions will close the gap between the current A7 expansion projects north and south of the Elbtunnel.

The upper part of the 2,230m tunnel will be covered with allotments, greenery and parks that will serve to reconnect the neighbouring districts of Othmarschen and Bahrenfeld.

According to Implenia, construction of the new tunnel plays an important role in the renewal and improvement of infrastructure on one of Germany’s main traffic arteries.

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The project, which contributes to significantly reduce the local residents’ noise exposure, will help to improve the quality of life of residents living near the road.

Implenia Division Civil Engineering head Christian Späth said: “We were able to identify numerous optimisation opportunities during the tendering process, which began in November 2019.

“This allowed us, among other things, to bring forward parts of the detailed design work and systematically incorporate the results of more than 30 coordination meetings into the project calculations.

“This meant we could significantly reduce the project risks for everyone involved and create a good basis for working together for the next eight years until the project reaches a successful conclusion.”

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Implenia, Hochtief JV wins €580m contract for German motorway tunnel. (Credit: Implenia AG.)