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Feasibility of Nearshore Placement Near the Swinomish Navigation Channel; Puget Sound, Washington

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Army Engineer Rsch Dec Center Vicksburg United States

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This Regional Sediment Management Technical Note RSM-TN discusses the analysis performed to investigate the feasibility of dredged material beneficial use sites BUS located in the nearshore region in Skagit Bay, Puget Sound, Washington. The Swinomish Channel, located adjacent to the North Fork Skagit River, presently has only two deep water placement sites available to accept U.S. Army Corps of Engineers USACE Operations and Maintenance O and M related dredged material. As part of the RSM initiative, the investigation sought to identify a low-cost, technically feasible, and environmentally acceptable alternative for future dredging and placement operations over the project life cycle. In this study, a three-dimensional 3-D hydrodynamic circulation model and a Lagrangian-based Particle Tracking Model PTM were employed to investigate the fate and transport of dredged material placed in the vicinity of the project site. The modeling serves as a basis to support new National Environmental Policy Act documentation for the USACE O and M dredging project over the next 13 years.

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Technical Report




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Approved For Public Release;

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