Hydrographic surveys should be made prior to dredging to determine existing depths within the project area and after dredging to determine the depths that were attained as a result of the dredging operation. Hydrographic surveys are the principal dredged contract management tool of the Corps. Records should be kept of quantities dredged and maintenance interval(s) to forecast future dredging and disposal requirements.ī. Since disposal of dredged material is usually the major dredging problem, it is essential that long-term projections be made for disposal requirements of each project. Dredging locations and the quantities of material to be dredged are two of the most important considerations in planning dredging projects. Identify pertinent social, environmental, and institutional factors.Ī. Evaluate potential disposal alternatives.ĭ. Determine the physical and chemical characteristics of the sediments.Ĭ. Analyze dredging location and quantities to be dredged, considering future needs.ī. In order to gather the data required for a dredging and dredged material disposal project, it is necessary to do the following:Ī. This chapter out lines the design consideration usually needed to meet the objectives of a dredging project. Long-term objectives concern the management and operation of disposal areas to ensure their long-term use. This should be accomplished using the most technically satisfactory, environmentally compatible, and economically feasible dredging and dredged material disposal procedures. The primary short-term objective of a dredging project is to construct or maintain channels for existing navigation needs but not necessarily to authorized project dimensions. For a complete version of this document click here.Ī dredging and dredged material disposal operation requires consideration of both short- and long-term management objectives.
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