Impacts of an Overboard Disposal Operation

by Stephen R. DeLoach, US Army Corps of Engineers, Dredging, Management Branch, Norfolk, VA, USA,
Elizabeth G. Waring, US Army Corps of Engineers, Dredging, Management Branch, Norfolk, VA, USA,



Document Type: Proceeding Paper

Part of: Dredging and Dredged Material Disposal

Abstract:

The objective of this study was to establish an acceptable dredge disposal site which would be physically and environmentally suitable for periodic use over the 50-year project life of a small boat harbor on the James River in Virginia. Overboard disposal was investigated because of possible problems with upland disposal, including groundwater intrusion, wetlands destruction, and Kepone contamination. The results from using both a mathematical model of the area and the Chesapeake Bay model convinced the advisory agencies to grant permission to use an overboard site. The Norfolk District surveyed a deep depression in the James River and determined that it could support multiple disposals. Since the area was near a sensitive oyster rock, water quality was monitored before, during, and after the disposal operation to observe the extent and density of the plume.

Subject Headings: Dredged materials | Water quality | Rivers and streams | Mathematical models | Groundwater pollution | Wetlands (fresh water) | Waste sites | Virginia | United States

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