In July/August 1992, the Corps of Engineers Buffalo District conducted a demonstration of equipment for dredging contaminated sediments. Several thousand cubic yards of sediment were removed from outside the Buffalo River Federal navigation channel limits using three dredge types: (1) open bucket, (2) enclosed bucket, and (3) submersible pump. The effectiveness of a silt screen deployed downstream of the dredge to reduce suspended sediment transport was also evaluated. Extensive sediment ...
Contaminated marine sediments exist in many US waterways. Dredging is often a convenient and economical method of safety removing these sediments. However, significant concern exists over the potential environmental effects resulting from the localized sediment resuspension and contaminant release that may occur during the removal operation. This report synopsizes hydraulic equipment, pneumatic equipment, and mechanical components used for dredging and innovative modifications to their dredgeheads. It also examines previously tested ...
Large mechanical dredges with clamshell buckets are being used for the new-work dredging. Hopper barges are loaded with the dredged material and transported by tug to the disposal site. Mechanical dredging is also the most likely technique for future maintenance. The economic loading of the hopper barges and the potential environmental impact associated with barge overflow during loading are important issues. Keywords: Barge scow, Clamshell, Dredged material, Dredging, Loading, Mechanical ...
This report is the first in a five-phased process designed to locate the most suitable sites for the long-term management of material dredged from three naval bases located in southeastern Virginia. These bases include the Naval Weapons Station, Yorktown, Yorktown, VA; the Naval Supply Center, Norfolk, VA. The long-term management strategy (LTMS) used in this process consists of evaluating existing management options, formulating the alternatives, performing a detailed analysis of ...
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