Ineco appointed for Spain-Morocco tunnel study

25 November 2025

Spanish engineering firm Ineco has been commissioned to conduct an exploratory tunnel study to validate the feasibility of the railway connection linking Spain and Morocco.

According to reports in Spanish media, the $1m contract will establish a detailed technical roadmap for the project.

Ineco’s scope of work includes the preliminary design of the exploratory tunnel, revisions to previous studies, and a comprehensive update of the route, geology, geotechnical conditions, security systems, terminals and associated installations.

Ineco will validate the critical geological conditions of the Strait, particularly in the areas where the project’s greatest risks are located.

The study is expected to be completed by August next year.

The latest development comes after German company Herrenknecht completed its study in October. Herrenknecht said it found the project feasible to undertake due to the availability of the technology needed to execute it.

The media reports added that clients will further study the project and make a final decision in 2027 regarding tendering.

Recent developments

MEED reported in August that Ineco had secured an estimated €350,000 ($409,000) contract to carry out a financial feasibility study for the proposed infrastructure.

UK-based Vodafone also won a contract to provide advanced telecommunications support to teams working on the project.

These developments followed the appointment of Herrenknecht in January for a €296,400 ($307,483) contract to conduct a drilling feasibility study.

The Spanish government revived the Morocco-Spain undersea rail link in June last year, after allocating about $2.5m for a renewed design study.

Project background

The project, originally launched in 2003, was put on hold following the 2008 financial crisis. It has undergone several rounds of feasibility studies, but remains in the planning phase after nearly two decades of funding-related delays.

The proposed design includes a double-track railway and a service tunnel extending 38.5 kilometres (km) between Tarifa in Spain and Tangier in Morocco. Of this, 28km will run beneath the Mediterranean Sea at a maximum depth of 475 metres.

Each single-track tunnel will have an inner diameter of 7.9 metres, while the service gallery will be 6 metres in diameter.

The project is being jointly developed by Morocco’s National Society for Strait of Gibraltar Studies and Spain’s Sociedad Espanola de Estudios para la Comunicacion Fija a Traves del Estrecho de Gibraltar.

In 2006, Swiss engineering firm Lombardi Engineering was selected to design the tunnel. Preliminary studies were completed two years later.

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Yasir Iqbal
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