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Dredging can be done to recover materials of commercial value; these may be high value minerals or sediments such as sand and gravel that are used by the construction industry. [2] Dredging is a four-part process: loosening the material, bringing the material to the surface (together extraction), transportation and disposal. [1]
One or more, Dredging pumps to create an under pressure in order to suck the substance into the hopper; Transportation tubes to transport the substance from the pipes to the hopper; An overflow to discharge the redundant water overboard; Degassing installation to extract any possible gas from the substance in order to reduce damage and increase ...
Dredging contaminated sediment in New Bedford Harbor, Massachusetts. The harbor is contaminated with polychlorinated biphenyls (PCBs).. Environmental remediation is the cleanup of hazardous substances dealing with the removal, treatment and containment of pollution or contaminants from environmental media such as soil, groundwater, sediment. [1]
The dredge could process over 10,000 short tons (9,100 t) of sand per day, and had a 141-foot (43 m) suction pipe that could work in 115 feet (35 m) of water. [2] The dredge is currently sunk into shallow water, and canted over to one side. [4] Most of the superstructure and the large boom are visible above the waterline. [4]
The company was founded in 1890 as the partnership of William A. Lydon & Fred C. Drews and was named Lydon & Drews dredging company. Early projects included the shoreline structures for the Chicago's Columbian Exposition. The company soon had satellite operations throughout the Great Lakes. It was renamed the Great Lakes Dredge and Dock Company ...
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A new NOAA study confirms that PortMiami dredging killed nearly 300 acres of precious coral. Urge Congress to force restoration projects.
Weeks Marine is a marine construction and dredging contractor based in Cranford, NJ. [1] It was founded by Francis Weeks and his son Richard B. Weeks in 1919 as the Weeks Stevedoring Company . [ 2 ]