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Genoa New Breakwater

Ports and sea works


In progress
Diga Foranea di Genova - Webuild

The largest intervention to strengthen the Italian port sector and the deepest dam in Europe 

The New Breakwater of Genoa is a unique work in the world for complexity, size, and positive effects on the city and on the country system, as well as being the largest intervention ever for the strengthening of Italian ports. Thanks to the realization of this work, Genoa is a candidate to become a center of gravity for large ships and a great logistics hub for trade in Europe.


A look into the depths of the sea: technical innovation and timing

Genoa's New Breakwater is an impressive and one-of-a-kind engineering feat: its foundation will rest on a seabed that reaches a record depth of 50 meters, and in its final configuration will reach an overall length of 6,200 meters. 7 million tons of rock material will be used to build the basement, on which precast concrete elements composed of nearly 100 cellular caissons will be placed. 

The caissons will measure up to 33 meters in height (like a ten-story building), 35 meters wide and 67 meters long.

The new breakwater will allow large container ships, over 400 meters long and 60 meters wide, and "World Class" cruise ships to enter the port of Genoa. 

The work will be divided into two phases: the first will end in 2026: it is the new entrance from the east, more than 300 meters wide, which will be builtallowing the maneuvering space for ships to be extended. In the second phase, to be completed in 2030, the widening of the Sampierdarena Canal to a width of 400 meters will be completed, thus increasing the operability and competitiveness of all terminals in the historic commercial basin.

Genoa New Breakwater project brochure
Genoa's New Breakwater in 3D
Genoa's New Breakwater, the deepest in Europe
La nuova Diga foranea di Genova, la più profonda d'Europa: come sarà costruita e perché - Geopop/Webuild
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New Genoa Breakwater: project's technical data

The biggest renewal of the port’s infrastructure on the Ligurian coast in 25 years. 

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total length, of which 4,125m included in phase A 

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New width of Sampiderna Channel

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Maximum depth

Sustainable just like the sea. The circular economy construction


Environmental impacts of the breakwater's construction are minimized


The innovative construction project involves building a structure designed to protect the docks and port facilities from climate change, a true sea wall. 

A solution has been envisaged to reuse almost all the material from the demolition of the old breakwater, with a circular economy way of seeing things, thus minimizing environmental impacts during construction, while concomitantly significantly reducing material transport and disposal, and thus fuel consumption. 

Waste materials resulting from the processing of marble quarries will be partially reused, again with a circulatory economy view. As for the concretes used for the construction of cellular caissons, a special mixture has been developed to significantly increase their impermeability.

A number of highly specialized manufacturing plants are to be used simultaneously to make the cellular caissons. Once the caissons are built and waterproofed, they are transported by sea to the project location, sunk and filled with inert recycled materials from the demolition of the old breakwater.

An advanced monitoring sensor system will then allow the infrastructure to be monitored both during construction and after its completion.

Genoa, March 25, 2024 – Safeguarding the marine ecosystem in the underwater construction site of the New Genoa Breakwater while promoting an eco-responsible approach in the infrastructure sector: this is why the Webuild-led consortium promoted a partnership with the Genoa Aquarium (Acquario di Genova), to safeguard the sea life taken from the seabed where works are being carried out, moving all species to the structure so that they can subsequently be moved back to their original location, off the Genoa shore, when works are completed.

Read the press note

Videonews New Genoa Breakwater. Protecting the sea

New Genoa Breakwater:


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Consolidation of the seabed 

The pouring of the gravel on the seabed, will stabilise the seabed. Works includes the setting of 70,000 piles measuring between seven and 12 metres in length. Filled with gravel, the piles will provide stability for the base of the breakwater. Their installation involves four pontoons: floating platforms each measuring 600 square metres. Each one has two cranes.

Two vessels transports to the site a total of 3,000 tonnes of gravel a day. The larger of the two vessels completes a delivery every 36 hours from Piombino, where the gravel is loaded. The smaller vessel does one from Genoa in six hours.

Nuova Diga Foranea di Genova, in viaggio con la nave Maria Vittoria

Diga Foranea di Genova - Webuild

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Latest Updates on the Genoa New Breakwater

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The New Genoa Breakwater is a major engineering challenge with which we renew our commitment to work with Liguria. It is an opportunity to put work back at the center, allowing us to bring back to Italy the know-how and skills of the people who have worked with our Group on some of the world's most iconic water projects.


Webuild and Liguria

Our committment to Liguria: iconic works already completed, strategic projects in progress and a model of collaboration for Italy


Terzo Valico dei Giovi - Genova Junction - One Project

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"Genoa’s new breakwater is the dream of a country that thinks of the future, of our children, of how to be competitive in the world, and of how to build quickly the infrastructure that is needed. This project is not a challenge for Webuild or the Government but for the entire country that must have infrastructure that is innovative and strategic.”

Genoa New Breakwater

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