DEME Invests in New Generation of Trailing Suction Hopper Dredgers

With the order of the ‘Bonny River’ at Royal IHC, the Belgian dredging, environmental and marine engineering group DEME is investing in a new generation of trailing suction hopper dredgers which will be trendsetting in coastal protection and dredging hard soils.

With this dredger, DEME is responding to the macroeconomic trend of maritime sand extraction at greater depths and further offshore.

A long suction pipe with a built-in submersible pump facilitates sand extraction from more than 100 meters deep.

Thanks to the hull’s optimized design, the ‘Bonny River’, with its transport capacity of 24,000 tonnes, has a limited depth when loaded, making the ship highly suitable for coastal protection assignments, even in regions with shallow beaches.

An additional asset is the second, shorter suction pipe for dredging works on a harder seabed. By equipping the vessel with a 75 tonnes draghead, the ‘Bonny River’ is multidisciplinary: as a trailing suction hopper dredger, the ship can also remove hard soil which wasn’t dredgeable in the past.

Environmental optimization

The ‘Bonny River’ will be able to minimize the turbidity generated by process water and enables dredging in environmentally vulnerable areas.

Moreover, the hydrodynamic hull and the dual-fuel engines (diesel and LNG) ensure further optimization of the fuel consumption and a minimal CO2 footprint.

The ‘Bonny River’ will carry a ‘Green Passport’ and a ‘Clean Design’ classification, a certification for owners and contractors which make the conscious decision to build and operate their ships in an environmentally friendly way.

Modern and efficient fleet

The ‘Bonny River’ – named after the Nigerian river of the same name – is the sixth ship that DEME has on order, besides the multipurpose ship the ‘Living Stone’, the self-propelled jack-up vessel ‘Apollo’, the heavy lift crane vessel ‘RAMBIZ 4000’ and two additional trailing suction hopper dredgers.

The order for the ‘Bonny River’ has been placed at Royal IHC.

The dredger will be built by Cosco at its shipyard in Guangdong, China.

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews ( holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee:

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