The International Association of Dredging Companies (IADC) is the global umbrella organisation for contractors in the private dredging industry: an industry that makes the world a safer, better and more sustainable place to live. IADC is driven to help that industry move forward with a variety of activities and publications, all of which can be found on this website.

News

IADC Fleet list 2023

As a service to the dredging community, IADC releases an updated version of the IADC Fleet List each year.

05 April

Out now: Terra et Aqua #169

The spring issue includes articles on applying early contractor involvement in marine infrastructure procurement, the importance of flocculation in dredge plume modelling and reinforced soil – the quay wall structure for the future?

22 March

Registration open for the Seminar on Dredging & Reclamation in Delft: 3-7 July 2023

Learn the basics of dredging from experienced lecturers and complete a tender process from start to finish!

21 March

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Latest issue

Terra et Aqua is a quarterly publication which aims to disseminate knowledge accrued by global dredging professionals as well as solutions to issues facing the industry. Issues of Terra et Aqua feature articles covering dredging projects as well as the topics of safety, socio-economics, technical innovations and the environment.

 

169
Published March 2023
Applying early contractor involvement in marine infrastructure procurement

Complex construction projects that use traditional procurement practices are often impacted by significant cost overruns and delays. Early contractor involvement (ECI) is a concept that strives to involve the contractor collaboratively at an early stage of a project’s development to mitigate or otherwise eliminate those risks. In August 2022, PIANC published the report “A framework for early contractor involvement in infrastructure projects” to help industry practitioners in choosing and best implementing ECI. This article is intended to develop on key aspects of the PIANC report and look at the factors that can lead to a successful maritime ECI project.

The importance of flocculation in dredge plume modelling

Numerical models are often used to predict the magnitude and behaviour of dredge plumes to help assess and manage any environmental risks. To provide a realistic prediction of plumes resulting from dredging, numerical models require information on the rate at which sediment is suspended by the dredging, along with the characteristics of the suspended sediment. Previous investigations have shown that in the marine environment, fine-grained sediment suspended by natural processes and dredge-related activities are typically present as aggregated particles known as flocs. This article considers the importance of including the process of flocculation in dredge plume models.

Reinforced soil – the quay wall structure for the future?

Steel and concrete are the most common materials used in quay wall structures. The application of these materials contributes to a high emission of greenhouse gasses such as CO2 and the materials make up a large part of the construction costs. This graduate research examines whether alternative quay wall structures have the potential to be more cost effective and more sustainable compared to conventional structures for inland ports. An innovative quay wall of reinforced soil was designed and quay elements implemented to make a quay wall structure. A comparison was then made based on the criteria costs and sustainability between the innovative quay design and two conventional quays.

Seminars & Courses

To optimise the chances of the successful completion of a project, contracting parties should, from the start, fully understand the requirements of a dredging project. IADC’s seminar strives to provide an understanding of the basics of dredging through lectures and workshops which are given by industry experts in a classroom setting for a hands-on experience.

MEMBERS

IADC has over a hundred main and associated members.

Publications

Dredging in Figures 2021

Dredging in Figures is an annual review of the global dredging market.

DOWNLOAD PDF Document | 4,58 MB

Annual Report 2021

In this “Annual Report” the Board gives an overview of the state of affairs of IADC and its activities in 2021. The report highlights various projects that the Association has undertaken for the year.

DOWNLOAD PDF Document | 2,57 MB

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