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World's First Ocean Ship Tunnel Agreed in Norway

  • Jun 25
  • 2 min read

The Norwegian government has greenlit a project to carve a mile-long tunnel directly through a rocky peninsula.



Rendering of a large vessel emerging from the Stad ship tunnel
Credit: Kystverket / Multiconsult / Link Arkitektur

So why is Norway so keen to bore a world-first tunnel through the mountainous rock of the Stadlandet Peninsula on the country's west coast? And why spend almost $1 billion to connect two fjords across a distance of just 1.7 km (1.06 miles) - or 2.2 km (1.4 miles) including the entrance structures built out into the water to guide ships safely into the portal? On the surface, it seems like an enormous investment for a relatively short stretch of water.


The Stad peninsula projects into the Norwegian Sea, creating treacherous conditions for maritime traffic due to its relentless weather and unpredictable currents. As a result, marine traffic is frequently delayed as fishing vessels and cargo ships have to wait out the storms. To address this problem, the new tunnel will link the two sides of the peninsula and will be large enough to handle regular traffic from vessels ranging from fishing boats to ferries and small cruise ships.



Rendering of the interior of the Stad ship tunnel carved through solid rock
Credit: Norwegian Coastal Administration

The expectation is that the tunnel will boost Norway's fishing and salmon-farming industries, encourage the movement of goods away from roads and rail, and expand tourism in the region. The government also estimates that the project could reduce fuel consumption and emissions by as much as 60 percent.


When finished, the tunnel will have a total height of 50m (164 ft), a clearance from sea level to the ceiling of 33m (108 ft), and a width of 36m (118 ft).


When complete, the Stad ship tunnel will not just be an impressive feat of engineering: It is also poised to become a major tourist attraction, particularly for those traveling on the Norwegian coastal route. With an estimated speed limit of eight knots, it will take vessels approximately ten minutes to pass through the tunnel.

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