Dredging is the process of excavating and removing material from the bottom of an ocean, river, pond, or other large bodies of water. Dredging is mainly used for marine construction projects, mining, sediment removal, environmental remediation, canal deepening, harbor maintenance, and many more.
Most Common Dredging Applications
- Marine Dredging
- Coastal Protection
- Ecosystem Restoration
- Fly Ash Dredging
- Lake Dredging
- Land Reclamation
- Beach Restoration
- Mining Dredge
- Navigation Dredging
- Port and Harbor Dredging
- Reservoir Dredging
- River Dredging
- Sand & Gravel Dredging
- Mine Tailings Dredging
We are one of the few companies who manufactures both our pumps and dredging equipment to ensure optimal support.
What is Dredging?
Industrial dredging is the process of removing sand, silt, and other solid material from the bottom of large bodies of water by using any combination of dredge pumps and material agitators or through mechanical means such as clamshell buckets. Dredging is a major service component in many major underwater construction projects to create a flat and stable foundation on the seabed. In addition, dredging is also used to maintain harbors, canals, rivers, lakes, and other bodies of water to ensure boats and large ships are able to safely pass without getting stuck in sediment build-up which occurs as sand and silt wash downstream, eventually clogging up channels and harbors. Periodically, this accumulation of material must be excavated and transported away by dredging due to large ships requiring a certain depth of water to remain operable.
Dredging Highlight Video
Problems Facing the Dredging Industry Today
There are many problems that face the dredging industry ranging from equipment problems to environmental effects. The main challenges with traditional dredging are:
- The dredge pumps routinely get clogged with sand, silt, and other debris
- The dredge pump and impeller are quickly worn down by abrasive materials
- The dredge pumps fail more often
- Longer downtimes for pump maintenance which halts production and hurts your bottom line
- Ecosystem and environmental damage stemming from high turbidity or mechanical dredging
EDDY Dredge Pump Advantages
- Non-Clog, High Viscosity, High Specific Gravity, High Abrasives, Low pH Pumping Design
- 40-70% Solids Pumping by Volume
- Ability to pump objects of up to 11-inches in diameter
- State-of-the-Art Research and Development Facilities
- 100% American Made
- Low Total Ownership Cost (See PDF)
EDDY Pump Marine Dredging Equipment
EDDY Pump provides the most innovative dredging solutions worldwide. Our team of expert pump engineers developed the EDDY Pump’s open rotor design which allows for far higher tolerances that allow for just about anything that will go into the intake to be passed through the discharge without issues. We also provide modular dredging products that can easily convert to different deployment types to ensure we have a deployment option that matches what you need for your job.
The EDDY Pump Excavator Dredge Attachment easily pins into your existing bucket linkage and is powered off of the excavators’ auxiliary hydraulics or a separate HPU. By using a cutterhead or high-pressure water jetting rings (depending on the dredging application), the patented EDDY Pump technology outperforms all centrifugal pumps in a variety of the most difficult dredging applications. The pump and cutterhead suction dredge work in conjunction to make this the optimal dredging system for handling compact material, highly viscous materials, and for pumping a high volume solids. The excavator pump attachment can easily pump slurries up to 4,500-feet without the need for a booster pump. For larger pump models and pumping distances of more than 2,000-feet, an HPU (Hydraulic Power Unit) is recommended for optimal production rates. All EDDY Pump suction dredges and excavator cutterheads are powered by our field-proven, U.S.A.-built, industrial slurry pumps.
Any excavator operator can be trained to operate the pump in just a couple of hours. In addition, this unit is completely modular and can be converted into a cable hung dredge or a diver operated dredge with little modification necessary.
For mining or construction operations where a crane is already available on site, the EDDY Pump Cable-Deployed Pump can be an ideal solution. Like many of our dredges, this cable deployed pump system comes with an optional water jetting material agitation system to fully optimize production rates. The cable-deployed pump can have an electric or hydraulic power system to meet the needs of the end-user.
The pump can be mounted off a cable, hanging off a crane and the water jetting ring is attached to the pump. It can be dropped onto the seabed as a diver operated unit and also be pinned to an excavator to become the Excavator Pump Attachment.
For ultra-precision dredging which requires diver visibility and mobility, we offer the Diver Operated Dredge Pump. This unit is completely submerged and rests on the lake bed or ocean floor and can support up to 1-3 divers at once. These diver units can be powered via electric or hydraulic depending on our client’s needs.
Our diver dredge comes equipped with over 300-ft of a suction hose that can be added to the suction inlet of the pump, providing increased versatility not commonly found in conventional diver operated dredges. This also allows for far more mobility, allowing for divers to dredge in precise locations without disrupting the pipeline. Additionally, this unit can be easily converted to a Cable-Deployed Dredge or an Excavator Pump Attachment with little modification.
Dredging Case Study
The following is a real-life case study using the EDDY Excavator Dredge Attachment. We are here to help you identify your application and learn more about the ideal equipment solution to meet your needs. We are the OEM for all the tools shown.
Application: Harbor Dredging
Material: Sand, silt, wood, and other foreign debris
Equipment Used: EDDY Pump 10-inch Excavator Dredge Attachment (More Info)
The Mississippi River Dredging Challenge
Because of the strong current of the Mississippi River, a company using a self-propelled dredge was not working effectively as they’d hoped to dredge a harbor in Granite City, Illinois, located just across the water from St. Louis, Missouri. Two years ago, Budrovich, a St. Louis-based construction company, began using a 10-inch EDDY dredge pump with an excavator pump attachment to efficiently extract river material, which includes a mixture of sand, silt, wood, and other materials—the concentration and density of which varies.
The Mississippi River is one of the world’s major river systems in size, habitat diversity, and biological productivity. Barges and their tows move approximately 175 million tons of freight each year on the upper Mississippi through a system of 29 locks and dams. At the headwaters of the Mississippi, the average surface speed is about 1.2 miles per hour—roughly one-half as fast as people walk.
“Before we installed the EDDY pump, our customer was using a self-propelled dredge, which was not appropriate for the application,” said the client. “A self-propelled dredge shouldn’t be used in a body of water that has current, so it was unsafe to use it in the Mississippi River. We were looking for a different solution for the customer, and that’s when we started researching EDDY Pumps.”
The EDDY Pump Dredging Solution
The EDDY Pump and Excavator Attachment was installed on a Caterpillar 350 material handler. “The cutter head goes on the end of the boom, and we use a 700 horsepower power pack to power the effort,” Brundick explained. “We average anywhere from 180 to 200 cubic yards per hour.”
Using the equipment for about two years, the company has faced only minor issues.
“We’ve had some challenges, for example, with the seals,” she said. “But the EDDY pump team is very good on the service end of things and helped to identify and troubleshoot the problem. They asked a lot of questions about our application and about the dredge pipe, so they really know how to take a very informative effort to ensure that their equipment is right for the customer.”
The client mentioned the agility of the equipment is its best feature.
“I like that because it’s on the boom of an excavator you have some room to play with the pump placement,” she explained. “You can also hook it to a crane. The EDDY Pump can go into areas where a large dredge could not fit. In order for it to be effective, it always needs to have a constant source of water. If you are dredging in a pond, you just have to make sure you keep a constant source of water. We don’t have this issue while dredging a river.”
Environmental Dredging and Remediation
Environmental dredging generally refers to remediation dredging or removing contaminated materials from specific underwater areas. Environmental dredges are built to be as precise as possible with extremely low turbidity to prevent material agitation of the surrounding ecosystem. A low turbidity dredge will greatly help keep the contaminated material from resuspension, which would allow the dangerous material to spread over a wider area, making things worse. Environmental dredges are typically equipped with video cameras, GPS, RTK for precise positioning, and/or sonar monitoring instruments to oversee the entire dredging process. This allows the process to be much more controlled over a navigational or construction dredging, ensuring the contaminated material is captured as safely as possible.