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Information for potential contractors for the Stad ship tunnel


The Norwegian Coastal Administration is working on the plans for the procurement of a contractor. The plan is to announce the work as a major fixed-price design and construct contract, which will be acquired after a competition with negotiation. In advance, the Norwegian Coastal Administration hosted a supplier conference on in January 2023.

The Norwegian Coastal Administration aims to announce the competition Q2 2024. The aim is to sign a contract Q3 2025, so the construction can start at the end of 2025.

Stad ship tunnel is a fairway, with a tunnel in the form of a long mountain hall and entrance structures as main elements.

This is intended as a major fixed-price design and construct contract, which will be acquired after a competition with negotiation. Simplified, the work includes:

  • Preparation of an appropriate execution plan and detailed design
  • Logistics
  • Establishment of intersections / tunnel mouths
  • Tunneling - similar mountain halls (caverns)
  • Establish structures - similar solutions as for quay and pier facilities
  • Mass handling
  • Technical installations

- The start-up phase for projects of this dimension is defining for the later process. It is very important to do a thorough job in connection with this procurement. That will save us time and problems later in the project, project manager Terje Skjeppestad points out.

Currently, the work with the tender basis includes the preparation of a technical function description, landscape plans with entrance areas and plans for mass handling and more.

We would recommend contractors to follow this website, with the short address kystverket.no/entreprenor. Here we will provide information about the process as soon as we have new informastion.

The Norwegian Coastal Administration held a supplier conference in September 2021, where we presented the project. There we also conducted short dialogue meetings with suppliers who wanted it.



Terje Skjeppestad /

Supplier conference for the construction of Stad Ship Tunnel 2023

On 31 January, the Norwegian Coastal Administration hosted a conference for potential contractors and suppliers to Stad Ship Tunnel at the Radisson Blue Airport Hotel at Gardermoen. The dialogue conference was held in Norwegian and required physical attendance.

“With this conference, we wish to prepare the contractor market for the coming competition, while at the same time receiving useful input to make the basis for competition as good as possible,” says Project Manager Terje Skjeppestad.

Looking for smart technical solutions for the inside of the ship tunnel

 Before the conference, the Norwegian Coastal Administration wished to be in contact with suppliers of technical systems that could have great significance for functionality, uptime and, not least, safety in the tunnel.

Read more abouth the conference

The Stad Ship tunnel project

Stadhavet Sea is the most exposed and treacherous stretch of water along the Norwegian coast. The goal of the project is to ensure a safer passage through Stad.


  • Length: 1700 metres for the tunnel run. 2200 metres from the tip of the lead construction to the tip at the other side. 
  • Height from base to ceiling: 50 metres
  • Width between the walls of the tunnel: 36 metres
  • Height from sea surface to ceiling: 33 metres
  • Cross-sectional area: 1661 m²
  • Volume of rock to be removed: Approx. 3 million m³. Equal to approx. 5,4 million m³ of blasted rock – which is equal to approx. 750 000 lorry loads.
  • Estimated cost of construction: Approx. NOK 2,8 billion (2021)
  • Estimated construction time: Approx. 5 years


Conventional blasting, with tunnel drilling rigs and bench rigs, is planned.

Three different alternatives for the use of rock masses from the tunnel construction are being investigated, including the establishment of a new commercial area locally.


  • The Norwegian Coastal Administration devised a concept study (KVU 2010) covering the following alternatives: ‘The zero alternative’ (with no new measures), ‘Small tunnel’ and ‘Big tunnel’.
  • A quality assurance process (KS1 report) has also been carried out for KVU 2010, commissioned by the Ministry of Trade, Industry and Fisheries and the Ministry of Finance.
  • In the National Transport Plan 2014-2023, the Government said that they wanted to proceed with a preliminary project for KS2, based on the ‘Big tunnel’ alternative. This was considered to have greater potential benefits.
  • Positive effects, such as the value of moving traffic from road to sea, safety and increased tourism, as well as positive effects for the fishing industry and other industries have not been calculated.
  • Stad ship tunnel will be the world’s first full-scale ship tunnel of this size.
  • In 2017 Norconsult AS and Dr. Techn. Olav Olsen AS delivered a technical preliminary project for the ship tunnel. The report includeed the topics lead structures, entrance structures, road bridges, portals, excavation and embankment, sailing through the tunnel, roads, electrical and telecommunications installations, fire and risk, ventilation, landscape designs and the environment
  • In the National Transport Plan 2018-2029, the Stad ship tunnel was included with a cost framework of NOK 2.7 billion. NOK 1.5 billion is included in the first part of the National Transport Plan, for the period 2018 to 2023.
  • The Norwegian Coastal Administration delivered its preliminary project to the Ministry of Transport in the spring of 2017. The project has been through external quality assurance phase 2 (KS2).
  • The Norwegian Coastal Administration carried out a project optimisation, with delivery on 15 June 2019, which resulted in a significant cost reduction.
  • In 2020, an extended quality assurance process (KS2) was carried out on the results of the project optimisation.
  • In February 2021, the Norwegian Coastal Administration received the letter of commission from the Ministry of Transport, which gave the green light to start preparations for construction. In March, the Ministry presented the proposition to the Storting on construction

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