Knowledge centre

    Registered Plant Committee

    IADC Registered Plant Committee

    The committee gathers data about the plant of all IADC members and supervises its verification The information is published by Clarksons in its Dredger Register, which is a comprehensive guide to the worldwide dredging fleet Members Mr J...

    A Guide to Cost Standards for Dredging Equipment 2009

    2009 - softcover, 62 pp - CIRIA - ISBN: 978-0-86017-684-8 ESTABLISHING A BASELINE FOR VESSEL VALUATION Dredging is a capital-intensive industry, often involving only a few main pieces of marine equipment on each project It is also a civil...
    Publication
    “Facts About Cutter Suction Dredgers” describes a type of hydraulic dredger that can dredge nearly all kinds of soils, especially hard ground and rock.

    Cutter Suction Dredgers

    “Facts About Cutter Suction Dredgers” describes a type of hydraulic dredger that can dredge nearly all kinds of soils, especially hard ground and rock Cutter suction dredgers (CSDs) are classified as hydraulic dredgers and are the most common...
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    Facts About

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    Choice of Type of Dredger

    Choice of Type of Dredger

    Choosing the appropriate dredger is determined by soil conditions, transport options, dredging location, water depths and placement, and economics Soil conditions The type of soil being dredged is a determining factor for selecting a dredger For...
    Monitoring Equipment - Acoustic Doppler

    Monitoring Equipment

    Monitoring equipment provides ongoing data about the quality of soils, quantities of soil and depths being dredged and environmental issues This specialised equipment is used for quality control of hydraulic fill and beach restorations They...
    “Facts About Dredging Plant and Equipment” describes the specialised equipment that has been developed to perform various and specific dredging operations.

    Dredging Plant and Equipment

    “Facts About Dredging Plant and Equipment” describes the specialised equipment that has been developed to perform various and specific dredging operations Port development, urban expansion, beach replenishment, coastal protection, flood...
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    Facts About

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    “Facts About Backhoe Dredgers” describes how modern backhoes work to excavate a dredging site and when and where they are the appropriate equipment choice.

    Backhoe Dredgers

    “Facts About Backhoe Dredgers” describes how modern backhoes work to excavate a dredging site and when and where they are the appropriate equipment choice A backhoe is a hydraulic excavator with a single digging bucket positioned on the end...
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    Facts About

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    Auger Dredgers

    Auger dredgers

    An auger dredger has an environmentally sound cutting tool that lies horizontally on the seabed, working precisely to loosen thin layers of sediment Work method of auger dredgers An auger suction dredger functions like a cutter suction dredger,...
    Water injection dredgers

    Water Injection Dredgers

    A water injection dredger injects large volumes of water into the waterbed, fluidising the sediment so that it can flow naturally to other deeper areas Work method of Water injection dredgers This is a specially developed vessel that uses pumps...
    Suction dredgers

    Tugs and Tows

    Tugs and tows are used for moving non-propelled dredging equipment over long and short distances for a variety of purposes Tugs or tug boats and tows or tow boats are used for towing or pushing non-propelled equipment: going to and from...
    Trailing suction hopper dredgers

    Trailing Suction Hopper Dredgers

    Trailing suction hopper dredgers or “trailers”, are self-propelled ships with hoppers, which are storage areas in the hull for keeping dredged material Work method of Trailing suction hopper dredgers Trailing suction hopper dredgers are...
    Dustpan

    Suction Dredgers

    Plain suction dredgers are stationary dredgers positioned with wires and with at least one dredge pump connected to a suction pipe and a delivery pipe Types of suction dredgers Suction dredgers can be divided into four types: standard plain...
    Side stone-dumping vessels

    Side Stone-Dumping Vessels

    Side stone-dumping vessels are used for transporting and placing rock and boulders in maritime and fluvial locations Work method of Side stone-dumping vessels The most modern side stone-dumping vessels are sea going and self-propelled They sail...
    Split hopper dredgers

    Split-Hull Hopper Dredgers

    Split-hull hopper dredgers discharge their loads from underneath the vessel by opening up – splitting – their hulls Work method of Split-hull hopper dredgers A split-hull hopper is a dredging vessel whose hull is split in two halves and...

    Ploughs, Beams and Rakes

    Ploughs, beams and rakes are tools that are attached to an A-frame, mounted on the stern of a tug or work boat and dragged across the waterbed Ploughs, beams and rakes are hydronamic dredgers that mobilise material underwater and then use the bed...
    Pontoons

    Pontoons

    Pontoons are floating platforms that can be adapted to function in a multitude of ways during dredging operations Pontoons are used by the dredging industry as heavy-duty work platforms for operations such as drilling, dredging, heavy lifting as...
    Pipelines

    Pipelines

    Pipelines fall into three main categories: floating pipelines, submerged or “sinker” lines and land or “shore” lines Floating pipelines Floating pipelines are either formed of steel pipes supported at regular intervals by buoyancy units or...
    Other high-tech dredging equipment - simulators

    Other High-Tech Dredging Equipment

    Dredging vessels and equipment come in a variety of specialised types, large and small, but nowadays most are equipped with state-of-the-art technologies Enormous trailing suction hopper and cutter suction dredgers attract a great deal of...
    Jack-up pontoons

    Jack-up Pontoons

    Jack-up pontoons are self-elevating platforms used to carry dredging equipment, such as cranes, boosters or soil investigation equipment to work sites Purpose built In recent years, a wide range of sizes of these jack-up platforms have been built...
    Grab or clamshells dredgers

    Grab or Clamshell Dredgers

    Grab or clamshells dredgers are very commonly used, rather simple and easy to understand stationary vessels, with and without propulsion Work method of Grab or clamshell dredgers Grab or clamshell dredgers have either a rotating cab or fixed...
    Flexible fall pipe vessels

    Fall Pipe Vessels

    Fall pipe vessels operate in deep water covering offshore oil and gas pipelines, levelling the seabed or applying scour protection Work method of Fall pipe vessels Fall pipe vessels (FPV) are equipped for rock installation at great water depths...
    Environmental Equipment

    Environmental Equipment

    Environmental dredging equipment is specially designed or adapted to remediate waterways that contain contaminated sediments Work method of Environmental Equipment The work method of each environmental dredger is specific to the equipment However,...
    Dustpan

    Dustpan Dredgers

    Dustpan dredgers are plain hydraulic suction dredgers that function like giant vacuum cleaners and are primarily used on river systems Work method of Dustpan dredgers Dustpan dredgers are a specialised type suction dredger with a suction head...
    Dipper dredgers

    Dipper Dredgers

    The dipper dredger is a powered bucket mounted on a barge which scoops material with a forward motion like a shovel toward the dredger Work method A bucket is firmly attached to the ladder structure and is forcibly thrust into the material to be...
    Cutter suction dredgers

    Cutter Suction Dredgers

    A cutter suction dredger is a hydraulic dredger that uses centrifugal pumps with a rotating cutter head to loosen, lift and transport dredged material Work method of A cutter suction dredger Cutter suction dredgers may: have a pontoon hull...
    Bucket-wheel dredgers

    Bucket-Wheel Dredgers

    A bucket-wheel dredger has a rotating mechanical device, an excavator, perpendicular to the ship’s axis, mounted in front of the suction head Work method The excavating head of the bucket-wheel contains 10 to 14 open or closed buckets The...
    Bucket ladder dredgers

    Bucket-Ladder Dredgers

    A bucket ladder dredger has a series of buckets mounted on an endless loop that scoop material from the waterbed and deposit it through a chute to a barge Work method of the bucket-ladder dredger The loop of the bucket-ladder dredger is powered...
    Booster stations

    Booster Stations

    Booster stations contain pumps which give a ‘boost’ to the dredger’s pumps making it possible to transport dredged material over longer distances Extra pumping force Booster stations can be used with trailing suction hopper dredgers and...
    Barges

    Barges

    Barges (or scows) are used to transport material that has been excavated by mechanical dredgers or to place other equipment at a dredging site Hopper barges Dredged material is loaded onto barges moored close to the dredger The barges then...

    Backhoe Dredgers

    A backhoe dredger is a mechanical excavator or bucket, mounted on a barge that draws material backwards, towards the dredger Work method of a backhoe dredger “Backhoes” are hydraulic excavators with a single digging bucket positioned on the...
    Auxiliary equipment

    Auxiliary Equipment

    Auxiliary equipment includes a wide variety of equipment that are not dredgers, but are integral to supporting dredging operations For the international dredging contractors, trailing suction hopper dredgers and cutter suction dredgers form the...
    Equipment - Volvox Atalanta rainbowing

    Equipment

    Dredgers and auxiliary equipment come in a variety of types and sizes, and the optimal choice depends on the specifics of a particular project When choosing equipment, contractors, clients and consultants must give careful consideration to the...
    Dredger Register 2017

    The Dredger Register 2018

    2018, hardcover, 572 pp, Clarksons, ISBN: 978-1-909828-80-3 The most complete and up-to-date register of dredging...
    Publication
    Innovative Design, Techniques and Equipment at Maasvlakte 2, Port of Rotterdam

    Innovative Design, Techniques and Equipment at Maasvlakte 2, Port of Rotterdam

    To meet the demands of this massive extension, engineers had to think out of the box – utilising Pleistocene sand, recycling rock from an old block dam and inventing new equipment and survey...
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    Articles

    PDF document | 3 MB

    Vesting and Ownership of Plant on Dredging Projects: A Fair Remedy or a Relic of the Past?

    Vesting and Ownership of Plant on Dredging Projects: A Fair Remedy or a Relic of the Past?

    Dredging contractors should remain vigilant that vesting of plant provisions, that is, transferring ownership of the Contractor’s Equipment to the Employer whilst the Equipment is on the Site, still exists and can have...
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    Articles

    PDF document | 458 KB

    Modification or Conversion of Dredgers

    Small modifications and big conversions can give old vessels new life and younger vessels an additional...
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    Articles

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    Panama Canal Atlantic Entrance Expansion Project

    Panama Canal Atlantic Entrance Expansion Project

    The challenge of widening and deepening the Panama Canal without obstructing the heavy vessel traffic in transit was met by using state-of-the-art, large capacity, self-propelled dredging...
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    Articles

    PDF document | 403 KB

    Irruption of the Trailer Jumbo in the Dredging Industry

    Irruption of the Trailer Jumbo in the Dredging Industry

    The newly built "jumbo" trailing suction hopper dredgers - ranging from 17,000 to 34,000 m3 capacity - have expanded the capabilities of the dredging industry...
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    Articles

    PDF document | 243 KB

    Kazakhstan, Offshore Exploration in the Caspian Sea

    Kazakhstan, Offshore Exploration in the Caspian Sea

    The real challenges of building underwater berms in the Caspian Sea were the sensitive environment, a harsh climate, complex local regulations and deep cultural...
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    Articles

    PDF document | 244 KB