![]() ![]() Dredging takes place in shallow water areas of lakes, rivers or ocean for the purpose of land reclamation, desilting, flood prevention, creation of new ports or expansion of existing ports. Dredging is referred to as the process of transport of underwater sediments (usually sand, gravel or rocks) from one region to another (a piece of typical dredging equipment is shown in Figure 1). The fluid mixture by and large consists of water as a liquid with solids being minerals, sand, gravel, human waste, drilling mud or most of the crushed materials.ĭredge pumps are a special category of heavy-duty slurry pumps that are utilized in the process of dredging. Slurry pumps are the mechanical devices utilized for pressure-driven transport of a fluid mixture (aka slurry). This increased length allows the dredge Hurley to dredge up to 75 feet deep.Definition of Dredge Pump and Slurry Pump The vessel hull was also increased by 48 feet from 305 to 353 feet. The ladder was lengthened by 48 feet to a total length of 108 feet. ![]() In 2009, the ladder extension project began at Ensley Engineer Yard in Memphis. Soon, the lengthening project was authorized and funded. The new A-frame and ladder hoist winch was sized for the eventual planned lengthening of the dredge and ladder.Įxtreme high water in 2007 brought the need for a deep digging dredge was re-realized. New azimuth bow thrusters and a new ladder hoist system were installed. In 2000, portions of the project were funded and completed. Not long after entering service, the need to dredge deeper was realized.Ī project to lengthen the dredge and increase its digging depth was authorized in 1997 and concept engineering was completed in 1999. ![]() It was originally built to replace the 1933-built Dredge Burgess and designed to dredge to a maximum depth of 40 feet. The Dredge Hurley was built in 1993 by Halter Marine in Moss Point, Mississippi for the USACE Memphis District. ![]()
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