Boskalis Environmental is a global leader in the large-scale treatment of mineral waste streams like soil, sediment, incinerator bottom ash (IBA) and mineral waste materials, from sewers, drains, pumping stations and street sweeping waste. We design and manage the entire integral process, from excavation, transport, treatment, quality control, re-use and disposal of the various material streams.

Company profile

Boskalis Environmental is involved in soil cleaning, the processing of dredged sediment, water and land remediations, resource reuse and depot management. We specialize in the large scale cleaning of contaminated soil and mineral waste. In doing so, we use techniques that we develop ourselves and installations that we design and build ourselves. We also take care of the entire process, including inspection, planning, transport and marketing of the partial flows.

Because we have our own technical service, engineering department and laboratory, we are able to carry out complex projects in full: from the preliminary research, the design and the project management, to the construction of the necessary installations, the implementation and the operations.

Boskalis Environmental works closely with Boskalis Netherlands and Boskalis International. Our products are used as building materials within Boskalis Netherlands (including Beaumix®). The Raw Materials Department takes care of its marketing and reuse in, amongst others, various projects of Boskalis Netherlands.

On this page, you will find information about our activities and our projects.

Contaminated dredged sediment management and remediation

Boskalis Environmental has worldwide experience in the execution of complex, wet remediation works, in ports and rivers. This involves a combination of dredging with the processing, reuse and/or disposal of (contaminated) sludge. We are experts in the field of separation of sand from and the dewatering of sediment. We have developed techniques and installations available for this purpose. Our goal is to recover as much reusable material as possible.

Depot management

In recent decades, Boskalis Environmental has specialised in the operational management and maintenance of large dredging depots. These depots are sometimes used for the temporary storage of dredged sediments before these sediments are processed into building material, or have a definitive character as a landfill.

Soil treatment

One of Boskalis Environmental's most important business activities is the large-scale cleaning of contaminated soil and mineral waste. In doing so, we take care of the entire process of acceptance, cleaning, various inspections, planning, transport and marketing of the sub-flows. Treatment with these plants takes place on the basis of physico-chemical separation, separating clean components from contaminated parts.

Handling of fines

By dosing a polymer suitable for the type of material, the settling of fine particles in water is accelerated. The selection of the right polymer takes place in our own laboratory. For the dosage of the polymer we have designed a polymer dosing unit. It is placed in a 20 ft shipping container, which makes transport to a project location possible. In this unit, polymer is mixed, diluted and dosed after measurement of the incoming density. This process is automated to enable remote control and checks.

Incinerator bottom ash washing

After a period of research and development, Boskalis Environmental has successfully designed a process for washing incinerator bottom ash (IBA) for use as a freely applicable building material. In July 2016, the joint venture Wash (Boskalis Environmental and HVC) started operations in the world's first fully- integrated bottom ash washing plant in Alkmaar.

Land remediation

Boskalis Environmental is (in particular) engaged in complex soil remedial projects in the Netherlands. We employ specialists who ensure that clean-ups are carried out in accordance with the applicable rules and safely. If necessary, we can use mobile treatment plants to clean contaminated soil on site.


Boskalis Environmental has its own dedicated laboratory that undertakes research activities such as sampling, geotechnical and environmental surveys and physical analysis. This is an added value for the client. The surveys carried out by our laboratory enhance the quality of our results, during both the preparation and execution of projects.

Our activities

Boskalis Environmental offers the following activities. Click on a title to learn more about this specific activity:

Video: our history

Given the growth of Boskalis Dolman, Stuyvesant Environmental Contracting LLC and Stuyvesant Projects Realization Inc activities in Europe and North America respectively, a strategic decision was made in 2017 to bring these three organizations under one new label: Boskalis Environmental. The name states the relationship with our parent company, Boskalis, and our core business, environmentally sound and sustainable solutions. In this video, we present the most important milestones in our history.


Our employees are the most important key to the success of Boskalis Environmental. The safety of the people who work for and with us is therefore the highest priority. In order to keep our working environment incident – and accident free, Boskalis has introduced the safety program NINA. Which stands for No Injuries, No Accidents and is a clear vision on safety.

Quality and sustainability
In addition, we are affiliated with the quality system WOW and we have a strong sustainability ambition. This means that we continuously work on reducing CO2 emissions, invest in innovative and sustainable equipment and train our people in responsible use of our equipment and energy efficient use on our installations.

Read more about the CO2 goals at the website of Boskalis Nederland (Dutch only): 

Boskalis Environmental has the necessary process – and product certificates:

  • ISO 9001:2015: Quality
  • ISO 14001: 2015: Environment
  • OHSAS 18001:2007: International standard for health and safety 
  • VCA 2008/5.1
  • CO2 Prestatieladder

To download these cerificates, you can scroll down to the download section below.



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