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.


Webinar: The Importance of Sustainability in Dredging!

16 June: Join us for the webinar The importance of sustainability in dredging!

11 May

IADC supports Building with Nature project with donation to help rebuilding villages in Indonesia after a large tidal flood

IADC supports Building with Nature project with donation to help rebuilding villages in Indonesia after a large tidal flood

28 April

Join the free IADC Meet the Expert webinars now!

Register now for the free IADC Meet the Expert webinars!

24 March

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Watch IADC's corporate video.

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.

Seminar on Dredging and Reclamation planned for Delft (NL)
Nov 08 - 12
Location Delft, The Netherlands
Period 5 days
Date 08 - 12 November 2021
Level No prior knowledge required
Singapore hosts IADC Seminar on Dredging and Reclamation in April 2022
Apr 04 - 08
Location Singapore
Period 5 days
Date 04 - 08 April 2022
Level No prior knowledge required
Online Course ‘Dredging for Sustainable Infrastructure’
Location 4 half-days online course
Level No prior knowledge required


Dredging in Figures 2019

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

DOWNLOAD PDF Document | 3,16 MB

Annual Report 2019

In this “Annual Report” the Board gives an overview of the state of affairs of IADC and its activities in 2019. The report highlights various projects that the Association has undertaken for the year.

DOWNLOAD PDF Document | 1,12 MB


IADC has over a hundred main and associated members.

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.


Published June 2021
Experimental study on the adhesion factor of clay

Clay is one of the three most commonly encountered soil types in riverbed and seabed, other than sand and silt. A major mechanical property of clay is the adhesion factor that reflects the ratio between its cohesive and adhesive strength under different water content. Currently, this adhesion factor is not exactly known. It is important however, to get a better understanding of the relationship between cohesive and adhesive forces, since large surfaces on dredging tools can generate a lot of resistance, therefore slowing production. In this study, experiments were undertaken to determine the actual relation between adhesion and cohesion. The results can help the implementation of analytical cutting models, in turn, allowing the optimal cutting angle in dredging practice to be calculated.

Interview with Dr Todd Bridges

From an early fascination in oceanography, nature has played a defining role in the career of Dr Todd Bridges. With a decade’s investment in the Engineering With Nature® initiative, he has seen that sustainability and engineering can go hand-in-hand providing economic, environmental and social benefits. His focus now is to build on that foundation – to encourage and facilitate collaboration across sectors, public and private, to advance and accelerate Engineering With Nature practice.

Coastbusters: A nature-based solutions coastal management alternative

Today’s challenges of erosion, flooding and storm surges are primary concerns for coastal communities around the world. Traditional coastal engineering solutions, such as concrete seawalls or rock breakwaters however, will become unsustainable due to their limited resilience, higher costs, societal impacts and unwanted ecological side effects. In response to these challenges, Coastbusters developed a nature-based solutions approach to sustainable coastal management. These solutions will create new habitats based on known ‘biobuilder species’ in the form of biogenic coastal reefs. The purpose of the reefs is to induce natural accretion of sand, attenuate storm waves and reinforce the foreshore against coastal erosion, thus adding to coastal protection.

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