Specialist services

Boskalis provides a range of specialist services including underwater rock fragmentation through Rock Fall, environmental services through Boskalis Environmental, soil mechanics and environmental technology through Cofra and explosive ordnance disposal services through Boskalis Hirdes EOD Services.

Underwater rock fragmentation

Boskalis Rock Fall specializes in marine drilling and blasting. The company handles underwater rock fragmentation, which is required when the ground is too hard for dredging, for example in port deepening, shipping channel clearance or pipeline trenching.

Drilling and blasting rock is precision work, certainly in environmentally sensitive areas and places where space is limited, such as in close proximity to quaysides or pipelines. Boskalis Rock Fall has expert technicians and state-of-the-art equipment which it can deploy rapidly anywhere in the world.

Environmental services

Boskalis provides sustainable, cost-competitive solutions for soil remediation on land as well as under water. Our strength lies in our integrated approach to the cleaning process, from precision dredging to re-use.

Boskalis Environmental is our specialist in contaminated sediment remediation. The company processes contaminated dredged material in fraction separation plants and prepares it for re-use.

Mining

Boskalis also provides solutions for entire mining processes – as for example in the Lelydorp bauxite mining project in Surinam. There we provided engineering and overburden removal through to bauxite mining and ore delivery. In addition to using traditional mining techniques, dredging techniques were used for top layer removal, making the use of blasting obsolete, and providing savings of up to 50 per cent compared with open-pit mining. Dredging techniques have been successfully used for the processing of mining products including gold, diamonds, rutile, phosphate, coal, iron ore and uranium.

Immersed tunnels

Boskalis specializes in the realization of immersed tunnels. We dredge building docks, make tunnel trenches, lay foundations and handle the transport, immersion and covering of tunnel elements. We have developed methods and equipment that enable us to perform high-precision work.

Unexploded ordnance solutions

Boskalis Hirdes EOD Services has in-depth knowledge and extensive experience in seabed inspection as well as the clearance, disposal and destruction of unexploded ordnance.

We focus on creating safe conditions for the construction and operation of offshore developments, such as wind farms. Our specialist teams work with the latest technology to locate, classify and recover ordnance in the offshore area and in coastal and shallow water zones.

Ground improvement

Cofra is the ground improvement specialist within Boskalis, specializing in the installation of various consolidation techniques. These are used to minimize construction time and include MebraDrain vertical drain, and the BeauDrain vacuum consolidation techniques. For the compaction of granular soils the company applies its Cofra Dynamic Compaction (CDC) technique.

Gravel and sand trading

Boskalis is widely involved in the production of gravel, sand and clay. We hold concessions for the production of such primary building materials at various sites worldwide.

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More about our activities

Construction
and maintenance
of ports

Boskalis has extensive experience constructing and maintaining ports and waterways worldwide.

Land reclamation

Boskalis is a global expert in sustainable and cost-competitive land reclamation and shore protection. We transport dredged material ashore, improve soil and realize a variety of construction projects.

Coastal defense and
riverbank protection

Boskalis is a leading global player in coastal defense and riverbank protection. We design, construct and maintain dikes, dams, flood barriers, wave-reducing islands and sand motors and replenish beaches and foreshores.

Project

Port and MOF, LNG plant Barrow Island, Gorgon

Design and construction of a new port and materials offloading facility in a class 'A' nature reserve. The project owner is developing LNG process facilities on Barrow Island off the north west coast of Western Australia approximately 140 km west of Dampier and 95 km north east of Onslow. Barrow Island is a Class A Nature Reserve and an internationally important conservation estate.

Project

Port development, Mombasa

The Port of Mombasa is currently the biggest port on the coast of East Africa north of Durban, and the only international port in Kenya. It is now in the throes of a huge expansion drive to both increase cargo handling capacity and accommodate Panamax and Post Panamax vessels. The port is a transit route for, mainly, Uganda, Rwanda, South Sudan and Northern Tanzania. The current container terminal has an installed capacity of 250,000 TEU but handled more than 770,000 TEU in 2011. The port will raise its profile as a regional hub by building a second container terminal with a capacity of 1.2 million TEU. The port authority decided to construct the container terminal in phases.

Project

Onshore co-mining project, Lelydorp

Suralco L.L.C., an indirect joint subsidiary of Alcoa Inc. and Alumina Ltd., has awarded Boskalis a contract for the mining of bauxite in Lelydorp, Suriname. Boskalis is responsible for the entire mining process, from engineering and overburden removal to bauxite mining and ore delivery.

Project

Cleanup sediment treatment, Fox river

As a result of industrialization the riverbed of the Fox River (Wisconsin, USA) had become contaminated with PCBs (polychlorinated biphenyls). Joining together a number of large paper mills based on the banks of the river have established the Fox River Cleanup Group to handle the remediation project. The site is on the federal Superfund program’s National Priorities List.

Project

Port expansion, Balboa

The plans to expand the Panama Canal represent one of the most important infrastructure improvements of the 21^st century. Since its opening in 1913 the Canal has provided the shortest and most economically viable shipping route from Pacific to Atlantic seaports. With the ever-increasing size of modern-day vessels, it was inevitable that the Canal would need to be widened and deepened. The expansion of the Canal has made the extension of the Port of Balboa at the mouth of the canal on the Pacific Ocean a necessity. The Phase 4 projects included Marine Works and Civil Works to improve two existing berths and to build a completely new berth capable of handling not only Post Panamax but also Super Post Panamax ships.

Company profile

Governance & Leadership

Fleet and equipment

Dredging & Inland Infra

Offshore Energy

Ports

Offshore Energy

Infrastructure

Strategy and approach

Contributing to society

Environmental and social

Underwater rock fragmentation

Environmental services

Mining

Immersed tunnels

Unexploded ordnance solutions

Ground improvement

Gravel and sand trading

Selection of brochures

Environmental contracting

Immersed tunnels

Cofra

Unexploded ordnance brochure

Corporate brochure

More about our activities

Construction and maintenance of ports

Land reclamation

Coastal defense andriverbank protection

Related projects

Port and MOF, LNG plant Barrow Island, Gorgon

Port development, Mombasa

Onshore co-mining project, Lelydorp

Cleanup sediment treatment, Fox river

Port expansion, Balboa

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Construction
and maintenance
of ports

Coastal defense and
riverbank protection