Another option RSI has developed is the use of 2 types of amphibious dredges. Barge mounted machinery must load material into a hopper barge for transport to land. Long reach excavators can reach from 50-70 feet and draglines a little further but less accurately. Mechanical dredging is quick and accurate but is often limited to reach from the shoreline or barge.
Dewatering technology has improved with the use of dewatering systems or geotextile tubes but the amount of water demands some area to work within. Hydraulic dredging is very cost effective if the sediment is being placed nearby (within a few thousand feet) and there is an area large enough to dewater the slurry and return the clean water. We realize that to be efficient and effective in the market there is a demand to employ more than one type of dredging method. Both can be very practical and efficient depending on the material type, depth, and location of its destination.ĭredging contractors often try to emphasize one method or the other based on the services they offer and equipment in their inventory. The most common types are an excavator or clamshell bucket. Hydraulic dredging includes the use of a pump, usually barge mounted, to move material in a slurry via a pipeline. There are basically two approaches to dredging, mechanical and hydraulic. Mechanical dredging involves removing sediment with machinery usually with a bucket of some type. Hydraulic Dredges versus Mechanical Dredges Over the past 3 decades River Sand has built and acquired a fleet of equipment and trucks to allow us to specialize in dredging. Projects involve different approaches to limit impact and associated costs. The dredging method and equipment are never exactly the same on projects. We have multiple long-term projects and always an array of short-term projects but regardless each project has various factors. Having the right piece of equipment is key to being effective and efficient in our industry.
River Sand’s toolbox is full of options for dredging. Amphibious excavators can travel and dig on land, mud, and water.Hydraulic dredge sizes are determined by the inside diameter of the discharge side of the pump.There are 2 basic methods of dredging – hydraulic dredging and mechanical dredging.
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