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In one particular embodiment, the dredge comprises a swinging ladder, articulated arm to which the attachment is connected. A wheel assembly located behind the shroud and beneath the suction pipe, and connected to the swinging ladder. A shroud mounted about the gatling plate and beneath the head plate and A gatling plate connected to and in open communication with the head plate and opposite the suction pipe, the gatling plate operated by a hydraulic motor mounted to the head plate opposite the gatling plate and adjacent to the suction pipe A suction assembly comprising a suction pipe one end of which is connected to and is in open communication with the suction hose, and the other end of which is connected to and in open communication with a head plate Means for connecting the attachment to the swinging ladder of the dredge, the swinging ladder comprising a suction hose In another embodiment, the invention is a suction attachment for a swinging ladder dredge, the attachment comprising: The wheel assembly comprises a heavy duty tire and rim assembly to move and position the suction attachment on and about the water body bottom, a wheel mount to connect the wheel assembly to the suction dredge, a load cell for measuring the amount of downward force experienced by the wheel, and a fork assembly comprising a plate on which the load cell is mounted. The wheel assembly is located just behind the shroud and beneath the suction assembly. The suction assembly comprises a length of pipe, or sections of pipe, that begins at a connection with the suction pipe or flexible hose from the suction dredge and terminates forward of the wheel assembly in a connection with the head plate above the shroud.
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Inside the shroud is a gatling plate rotated by a hydraulic motor mounted just above the shroud and centered on the head plate. The shroud is attached to a head plate, and is designed to both enclose the solid particles suspended as a result of the removal operation, and to direct the suspended material to the mouth of the suction pipe. In one embodiment, the invention is a wheel-guided open suction attachment for a swinging ladder suction dredge with articulating capabilities, the attachment comprising a shrouded suction assembly mounted to a guiding wheel assembly.
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However, large materials and debris can be very problematic for an auger due to the large distance materials must travel from the end of the auger to the suction pipe.īoth the cutter head and horizontal auger have difficulties with reducing the turbidity produced through dredging because to remove intended sediments, the sediments must first be agitated. The auger can cover a wide swath of area at any given time, and to some degree, follow contours. The horizontal auger also has its strengths. This is an efficient and effective way to remove material, eliminating the need for dredge swing line anchors.
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The cutter head dredge has advantages over the auger dredge due to its ability to follow contours when possessing articulating and swinging capabilities. This method typically employs a cutter head or a horizontal auger to aid in the removal of these sediments. This is a more efficient means of removing material, but it often requires multiple passes to achieve designated decontamination levels. This method produces good results, but can be and often is time, equipment and manpower intensive.Īnother method is hydraulic dredging which is commonly used in areas of shallow water. These buckets use positioning devices to locate and extract sediment one bucket at a time. One method is mechanical dredging using a modified clamshell bucket. The primary purpose of the former is to create and/or maintain bodies of water open for navigation while the primary purpose of the latter is to remove sediment considered a threat to public health from a body of water.Ĭontaminated sediments can be removed by a number of different methods. Sediment removal from the bottom of natural and artificial bodies of water falls broadly into one of two camps, i.e., navigational and environmental.