The first element of the Fehmarnbelt tunnel successfully immersed

After a multi-day operation, the first of a total of 89 concrete elements for the Fehmarnbelt tunnel is now in place on the seabed. The historic event began late on Monday evening, 4 May 2026. Five tugboats and the special immersion vessel IVY transported the tunnel element from the tunnel factory at Rødbyhavn on the Danish island of Lolland to the immersion point off the Danish coast.

Around noon on Wednesday, the immersion itself began. Approximately 14 hours later, the dedicated position in the Fehmarnbelt had been reached, and the first tunnel element had been positioned precisely in the tunnel trench in front of the Danish tunnel portal. Subsequently, the element was connected to the portal using hydraulic arms. The position was then finally confirmed by precise laser measurements inside the immersed tunnel element. Later in the day, IVY will then be released from the element. 

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Originally published on 7 May

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