Germany and Denmark to Build World’s Longest Immersed Tunnel

By Paul Riegler on 20 October 2020
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Driving in Sønderborg, Denmark

The governments of Denmark and Germany announced that work has begun on the construction of what will be the world’s longest immersed tunnel, the Fehmarnbelt Tunnel, once it is completed.

The tunnel is being constructed across the Fehmarn Belt (Danish: Femern Bælt, Low German, Femernbelt), a strait that connects the Bay of Kiel and the Bay of Mecklenberg and lies between the German island of Fehmarn and the Danish island of Lolland.

The new tunnel will serve as an alternate means of travel between the two countries, now served by a ferry service from Rødby in Denmark to Puttgarden in Germany.   Whereas the crossing currently takes 45 minutes by ferry, it will take seven minutes by train via the tunnel and ten minutes by automobile.

The move follows over a decade of planning.  The tunnel was first proposed in 2007.

The tunnel will be up to 130’ (40 meters) below the surface and will be 11.1 miles (18 kilometers) in length.

The project is expected to cost over €7 billion ($8.28 billion), a sum far less than the cost of constructing the Channel Tunnel, known as the Chunnel, which was $15.5 billion (£12 billion) and which opened in 1993.  The Chunnel was constructed using a boring machine, unlike the Fehmarnbelt Tunnel, which is being constructed by immersing pre-built sections.

(Photo: Accura Media Group)

Accura News

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