The dredge’s rotating cutterhead surrounds the suction intake line drawing-in free-flowing materials which can move a slurry of liquid and solids from the suction end through the pump along a discharge pipeline to a disposal site. The Cutter Suction dredge uses a basket cutterhead excavator to loosen material to be dredged and is defined by the diameter of the dredge’s discharge pipe. An Ellicott B590E Bucketwheel Dredge – Canada Bucketwheel dredges can have more expensive upfront purchase prices than most dredge types and is over-built for maintenance digging of fine grain elements. The bucketwheel dredge is efficient and precise, cuts equally well in either direction and offers simplified depth control. Bucketwheel dredges are ideal for aggregate mining and excavation of harder material. However, these dredges are very effective for use in lined ponds as they may be supplied with auger wheels to protect the bottom from being punctured.īucketwheel dredges operate like a cutter suction dredge on spud and anchor systems, typically with the use of a spud carriage. The wide auger dredge heads are less effective on surfaces that contain a rough or hard compacted waterbed. Auger dredges are best utilized in water depths ranging betweenĤ ft. All systems are designed for maximum versatility and transportability and can be customized for specific applications. These vessels can also be used for a marina, lake restoration, or agricultural water projects. Auger dredges are sometimes ideal for unmanned operations in lagoons and wastewater ponds where human access is undesirable or dangerous. They are used for removing specialized solids and remediation. “The McFarland” Hopper dredge – the Mississippi Southwest PassageĪuger dredges utilize a horizontal Archimedes’ screw-shaped excavator and operate by using cables and pully positioning. Hopper dredges often have difficulty operating in shallow locations, excavate with less precision than other types of dredges, and are more costly to purchase and repair. The two most popular methods of discharge for this type of dredge include: 1) Dumping by opening the hopper doors located underneath the dredge and 2) Pumping the sand onto shore using a side caster pump Hopper dredges are typically used for island-building, dredging deep seas, open water applications, and building large ports. The captured sediment is then transported as the dredge travels to the placement area or disposal site. Once the materials have been collected, they are stored inside the “belly” of the dredge, referred to as the hopper. Hopper dredges are self-propelled oceangoing vessels that are designed to gather sediment using drag arms that trail alongside the dredge on the bottom of the waterway. A way to assist with reducing the number of uncertainties upfront is to work with a reputable dredge manufacturer who is interested in helping you to select the right type of dredge designed for your specific dredging application. Regardless of the type of project, dredging is a challenging and complex undertaking. Maintenance, storage costs, wages, benefits, insurance, dredge permits, and other ancillary equipment when not in use.Contamination level of sediment and overall production.Dredging depth and pumping distance to the disposal area.When evaluating a dredge and prior to purchase, contractors, homeowner associations, municipalities, and marina owners, should consider: Having an idea of the project or type of projects you plan to complete will help determine the type of dredging equipment that best meets your requirements. The answer depends on several factors, such as environmental conditions and details of the project. As a prospective dredge owner, perhaps you are most curious about what size of dredge you will need to complete your project.
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