ports due to environmental restrictions related to turbidity, marine ecosystems, and sea life. TSHDs are often restricted from working the inner harbors and reaches of U.S. The solid, sandy part of this slurry sinks to the bottom of the hopper while the water separates, rises to the top, and drains overboard creating what is known as water column turbidity. The mix of material and water pulled in by the pumping system is then discharged into the “hopper” of the vessel. TSHDs may have one or two drag-arms that lower to the seafloor and suck up material in much the same fashion as a vacuum cleaner, as the dredge moves through the project area. Trailing suction hopper dredges (TSHDs) operate hydraulically and are well-suited for dredging materials ranging from soft mud and silt to dense sands and clay. No matter what the need, domestic dredgers are meeting the challenge. In addition to design and technical capabilities, environmental restrictions and regulations often dictate whether a trailing suction hopper dredge, cutter suction dredge, or mechanical dredge can respond to the coastal protection, wetland restoration, port deepening, and channel maintenance needs of the Nation. dredging market is complex and relies on the diverse fleet of private dredging companies to get the job done. The reasons for that are many and these realities cater to regulatory, commercial and regional needs.
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