What we do

Challenge

The 35 km² Westermost Rough offshore wind farm is located at about eight km off the east coast of England, next to the city of Hull. It was commissioned in the first half of 2015 and was constructed by a subsidiary of the Danish company DONG Energy, the largest operator of offshore wind farms.

Some 35 wind turbine generators (WTG) and one substation are installed at Westermost Rough, providing a total capacity of 210 MW. It is the first full scale commercial application of the Siemens 6 MW turbine. The WTG’s are installed on top of monopiles with a diameter of 6,5 m and weighing between 500 tonnes and 810 tonnes each. Transition pieces weigh around 367 tonnes each.

Manipulating such volumes and weights in offshore conditions is quite challenging. In addition, the 500 miles distance between the fabrication yard and the offshore installation site required thoroughful planning with regard to limiting off-time, decreasing operations cycle time, and economic execution of the project.

Our solution

As the main contractor for the foundations, DEME was responsible for load-out of foundations in Denmark, transportation to the UK, installation and grouting of the monopiles and transition pieces, and secondary works. Extensive preparation and engineering included the design and fabrication of a state-of-the-art gripper and lifting tools were necessary to achieve successful operations.

At Westermost Rough DEME set a new reference in that no onshore storage or marshalling was needed, and the foundations were immediately installed after transport from Aalborg, Denmark. The company assigned its heavy lift jack-up vessel ‘Innovation’, equiped with on on-boad 1.500 tonnes crane. By combining transport and installation in one operation, DEME was able to decrease cycle times and to save valuable time for the client. Shuttling between Aalborg and the east coast of England, ‘Innovation’ took five sets of monopiles and transition pieces in every single sailing. The project was executed without a single Lost Time Injury (LTI).

Used technology

Offshore installation vessels

DEME involved local UK content in the project for the secondary works that were carried out after grouting. A UK project office was established at Grimsby port, and local companies at TeesPort executed vessel preparation, mobilization and demobilization when ‘Innovation’ docked there.

Related jobs

All jobs

Technical Expert - Gearboxes

As a technical expert - Gearboxes, you will play a key role in providing technical support to our internal stakeholders related to all aspects of maintenance activities, troubleshooting & improvement initiatives on the installed gearboxes in our fleet and there direct related systems. Mainly through maintenance plans are set-up and prepared through workorders in our asset management system ensuring equipment is maintained to the highest standard and reliability with a long-term vision. Additionally, extending your external network of suppliers & service providers will be key for expanding your knowledge.

DEME General

Technical

Belgium

See details

Operational Buyer

The Operational Buyer is responsible for the execution, monitoring and aftercare of the purchasing process and managing the purchasing administration, within the guidelines and procedures of the department, in order to support the department and the internal customer(s) for the timely processing of requests and purchase orders. Focuses on account quality, lead time, on time in Full delivery, customer satisfaction, supplier management and optimization of the Total Cost of Ownership

DEME General

Supply Chain / Procurement

Belgium

See details

Contract Manager India

DEME is a global leader in dredging, marine engineering, and environmental remediation, with over 140 years of expertise. Known for its pioneering approach to innovation and technology, DEME has established a strong international presence, working across more than 90 countries worldwide. Although rooted in Belgium, DEME operates in all seas and on all continents.

In an operational environment with complex contract structures, high client expectations, and increasing regulatory constraints, DEME is seeking a Contract Manager to support its operations in India. Based in our Chennai office, you will assist in the execution of the regional projects from a contractual-technical perspective, managing contracts with clients, main contractors, and related subcontracts and supply agreements.

DEME General

Legal & Insurance

See details

HR Specialist

As HR specialist you will provide support for 2 HR business partners in their daily operations which include amongst others recruitment, staffing, training & development, performance monitoring & employee counseling.

There are no direct supervisory responsibilities, and you will report to the HR BP Group Manager.

DEME General

Belgium

See details

Electrical technical expert

As an Electrical Technical Expert at DEME, you will be responsible for designing, developing, and maintaining electrical systems, with a specific focus on maritime navigation and communication equipment. You’ll work closely with internal stakeholders and act as the point of contact for external suppliers and repair facilities. Your role ensures that all activities comply with maritime regulations and safety standards.

DEME General

Technical

Belgium

See details

Technical Expert - Cranes

As a Technical Expert, you will be responsible for providing specialized technical support for our offshore ships, focusing on our fixed cranes. You will work closely with internal stakeholders, ensuring that all technical systems and equipment are maintained to the highest standard. This role involves creating and preparing work orders, developing maintenance plans, and collaborating with external suppliers and service providers to ensure knowledge exchange and optimal system performance.

DEME General

Technical

Belgium

See details

Electrical Expert Engineer

DEME Concessions offers integrated capabilities, bringing together state-of-the-art expertise and top partners to focus on useful and economically viable long-term projects in the ports and maritime, offshore wind, green hydrogen and infrastructure sector that benefit concession owners, users and private-sector partners alike.

Epitomizing DEME’s concession-construction model, DEME Concessions is committed to the DEME Group’s values of social and environmental responsibility towards all its stakeholders, and to its on-going endeavor to make a positive contribution.

To support its expanding activities DEME Concessions is looking to strengthen its team with an Electrical Expert Engineer. The Electrical Expert Engineer is responsible for providing electrical project support and services from his/her expertise throughout the different development phases of Green Hydrogen market and be directly involved with multidisciplinary project development teams for projects around the world.

DEME General

Technical

Belgium

See details

Office Accountant | Lambersart

This position provides accounting support across DEME business entities in France while interacting with the accounting team lead and Finance Manager France.

DEME General

Finance

France

See details