Bangor P990 Wharf Impacts Modeling

cbec performed detailed 2-dimensional hydrodynamic and sediment transport modeling of tidal flux and currents in the Hood Canal, a sub-basin within the Puget Sound inlet system, Washington.

cbec has been assisting the prime contractor to NAVFAC (U.S. Navy) with mitigation assessment and planning services in association with implementation of a new facility at the Bangor Submarine Base in the Hood Canal.

Field data collection in the Hood Canal included installation of several stage (water level) recorders, grab sediment sampling of ocean bed sediments, detailed single beam and multi-beam bathymetric surveys, extensive topographic surveys using RTK GPS in intertidal areas, and multiple Acoustic Doppler Current Profiler (ADCP) transects across the Hood Canal and in the nearshore littoral zone proximate to the proposed new wharf site.

The Delft 3D modeling platform was then utilized, previously developed in detail for this region of the Hood Canal, to investigate potential changes to the hydrodynamic flux patterns in the vicinity of the new P990 wharf, and the resultant potential changes in littoral sediment transport along the shoreline of the Hood Canal. This was a critical piece of the environmental impact assessment. It was concluded that the wharf should not significantly effect nearshore physical processes.

Details

River/Watershed: Hood Canal
Project: 11-1005