Ports, Marine Facilities & Dredging

IMDC offers a full range of integrated solutions for ports, marine facilities, dredging and reclamations. Our services span the whole lifecycle from site selection and feasibility through concept development, FEED, EPC and site supervision during construction. We provide value to our clients and help them to achieve their goals.

A Fully integrated approach

Overall, through our partnership with Tractebel Engineering Ports and Waterways, we can offer clients advice throughout the whole process as part of an integrated service package or deal with specific tasks. Our multidisciplinary teams can provide consultancy in every project stage. As part of Engie group, we can draw upon the experience of other companies within the group, in addition to our own expertise. These synergies provide us with detailed feedback, enabling us to provide specific solutions to our clients’ needs.

Port and terminal planning - IMDC works together with you to define and develop strategic plans for ports and terminals around the world. We can offer, together with our affiliate Tractebel, the full range of technical, economic, operational and environmental issues that need to be considered in any development.

Access channel design and navigation - IMDC has a long history in the design of navigation channels, manoeuvring areas, turning circles and port basins. An important element in our approach is the data collection and the surveys we carry out in order to gather all the necessary information. The obtained results are used, in combination with the latest numerical modelling tools, to define the orientation and alignment of the approach channel.

Protective structures - Breakwaters are often needed to provide shelter for vessels against wave and current action. Thanks to its strong knowledge of hydrodynamics and morphodynamics, IMDC is able to provide an integrated design for any type of breakwaters. Throughout our services the focus is to find a concept that can be realised, not only in terms of technicality, but also in terms of cost-benefit ratio and social and legal acceptance. For its design processes IMDC relies on the widely used standards for breakwater design, applying its knowledge on current and wave climate, geotechnics and morphodynamics.

Intake and outfall design - Discharges and outlet structures may give rise to a number of adverse effects on the operation of the system and on the coastal environment if they are constructed of inappropriate materials and/or are poorly sited. IMDC use state-of the art modelling techniques and expert knowledge to find the ideal location for an intake or outfall that minimises any adverse effects.

Waves, currents, and sediments - Using a combination of desk assessment and state-of-the-art computation modelling we predict the we predict wave and currents to assess ship handling and mooring design, navigation, breakwater design, sedimentation, coastal impacts and recirculation.

Metocean data collection - IMDC is specialised in tailor-made measurement campaigns to provide answers to specific questions of the client. These monitoring campaigns are the basis for the in depth analysis of the Environmental Impact projects.    

Workability/downtime assessments - Downtime studies are used extensively to assess the availability of LNG offloading operations providing key input for assessing the economic viability and reliability of LNG projects. Using a range of techniques IMDC provides an assessment of the percentage of time in which operations can continue as well as expert advice to resolve any downtime issues.

Coastal impact assessment - Any shoreline development requires consideration of its impact on the coastline. IMDC uses a range of computational modelling tools to ensure these impacts are appropriately assessed for the individual projects.  

Environmental impact assessment - The environmental aspects of any port development have become increasingly important. Both clients (project owners) and contractors are confronted with environmental requirements becoming ever more stringent. With a thorough knowledge of relevant international legislation IMDC can provide assistance for a wide range of application areas. 

Dredging Consultancy
Ever since its foundation, more than 30 years ago, dredging consultancy forms the heart of IMDC’s business. We can provide consultancy for just about any stage of your dredging project, ranging from master plan to detailed designing efforts, drawing up tender documents and budget estimates, to supervision and expert missions. Besides this, IMDC can also be your partner in assessing and recommendations for dredging techniques and equipment technology.

We investigate the disposal and treatment options of the dredged material and assess the environmental impact of the dredging operations, proposing mitigating measures where necessary. In short, our multidisciplinary team, many of them with substantial experience with worldwide-operating dredging contractors, can offer valuable help to our clients that want to create new or deeper ports and waterways (capital dredging),maintain the existing ones (maintenance dredging) or reclaim land on the water (reclamation dredging) in the most efficient way. 

Dredging equipment 
Using appropriate dredging equipment for the job is of utmost importance for the successful execution of a project. IMDC assists clients in choosing the appropriate dredge equipment and dredging methodology. Whether a client prefers to buy a new dredger or hire one, or maybe wants to modify and adapt one of their own existing dredgers, IMDC writes the specifications for the tender documents so that the optimal dredger is obtained for the job that has to be done. Our expertise also lies in evaluating and optimizing where possible the operational and technical performance of the clients’ dredgers and, on a larger scale, provide them with advice on their fleet composition. 

From feasibility study to execution 
From a project idea until the realization is a long and difficult process. IMDC supports their client in this design process from start to finish: 

    • The feasibility study in which the idea is translated into an actual project and the general outlines are evaluated ;
    • The basic design in which the parameters of the project are further elaborated ; 
    • The detailed design in which the dredging volumes, cost estimation, project planning and phasing are determined in depth ; 
    • Writing of the tender documents ; 
    • Assisting the Client in the selection of the winning bid, in order to make sure he receives best value for his money. This process can include technical offer evaluation, answering bidder’s queries, active involvement in negotiations with candidate-contractors, etc. 

After this process, the project is ready to be executed and the works can start. 

Site supervision and control 
The IMDC dredging engineers all have ample practical experience with working on dredging projects. Therefore we can supply client representatives to supervise the contractor with expert knowledge, so that the works are executed and completed in full compliance with the client’s needs and expectations. This includes among other things: accurate progress monitoring, relevant quality checks and technical and practical advice on the job with the support of an experienced multi-disciplinary back-office team where needed. 

Disposal of dredged material and environmental impact
The environmental aspects related to dredging projects are becoming increasingly important. Not only the final destination of the dredged material, whether or not contaminated, might be an issue, also the turbidity created during the dredging operations turns to be a major point of attention. Therefore IMDC can assess for its clients the different disposal and, if necessary, treatment options available so that an efficient and environmental friendly process can be guaranteed. IMDC has extensive experience in the assessment of the impact of turbidity-generating activities. Through intensive monitoring and modelling of sediment plumes the behaviour and impact of head, overflow, spoil placement, reclamation area run off, propeller wash has been studied numerously for near-field (a few hundred meters) and far-field (1-100 km) impacts in various metocean conditions and for various soil types and project areas. IMDC even has developed an online Sediment Plume forecasting system, EcoPAM that supports clients in mana-ging the dredge works environmentally. IMDC has specialized equipment to perform both stationary or vessel-based measurements of the turbidity and sediment plumes as well as 10- years of experience together with partner VITO-TAP in providing sediment maps based on remote sensing images (satellite, airplane or drone platforms).