The project comprises five breakwater sections with a total length of approximately 2.4 kilometers, with Thomas Beton responsible for 45 percent of the concrete deliveries. The breakwaters are designed as submersible reinforced concrete structures approximately 50 meters long, just over 13 meters wide and up to 16.5 meters high. They are constructed using large reinforced concrete caissons, which are cast on a specially designed floating platform before being launched and completed in the water.
“This is a major and technically demanding project where the quality of the concrete and reliable deliveries is crucial,” says Hans Karlander, President and CEO of Thomas Concrete Group.
The first caisson was launched in July 2026 and weighed approximately 3,700 metric tons. In total, close to 50 caissons are expected to be launched as part of the construction of the new breakwaters.
The marine environment places high demands on the durability of the concrete. The concrete must withstand long-term exposure to salt water, moisture and frost. The deliveries include concrete for base slabs, walls and prefabricated components such as superstructure slabs and concrete breakwater elements.
“Thomas Concrete Group has extensive experience of complex infrastructure projects. We are pleased that our expertise is contributing to an investment that will play an important role in the continued development of the Port of Gdynia,” says Hans Karlander.
The new breakwaters are an important first step in the development of Gdynia’s future Outer Port. In the longer term, the planned expansion is expected to create approximately 150 hectares of new port area.
The expansion will also create the conditions for a future logistics terminal for offshore wind power. The breakwaters will therefore play a central role in creating the protected water area required for the port’s continued expansion. Deliveries are expected to continue until the third quarter of 2027.
