Siemens Gamesa offshore wind turbine plant

A very significant contribution to the development of French offshore wind farms

As the main supplier to France’s offshore wind energy programme, Siemens Gamesa has built a 36-hectare production plant for wind turbine blades and nacelle assembly on a site in Le Havre, together with a logistics port facility.

Artelia provided a range of project management services for this major project to develop renewable energies in France.


Launched in 2015, this project was completed in 2022 with the opening of the plant. Located in the port of Le Havre, on a 36-hectare site, the plant consists of three separate units (blade production, nacelle assembly and port logistics). It includes very large production and storage halls (300 to 400 m long and 15 to 30 m high) and various service areas (offices, meeting rooms, changing rooms, toilets). The factory produces blades measuring between 75 and 81 m in length in a single piece and assembles nacelles weighing more than 350 t .

The Siemens Gamesa plant in Le Havre is dedicated to the production of 8 MW offshore wind turbines, and has begun supplying the first machines for the Fécamp (EDF) and Saint-Brieuc (Iberdrola) wind farms. In view of the projects currently underway, it should be involved in equipping more than 1.5 GW of power on the French Atlantic and Channel coasts.

Artelia managed the architectural and technical design of the entire project, including the preparation of applications for planning permission. It covered all aspects of the project (civil engineering, structure, roads, electrical and mechanical installations, water management, fire protection, installation of photovoltaic modules, landscaping, etc.).