Ship Simulation Study of Grays Harbor Navigation Project, Grays Harbor, Washington

Grays Harbor is a log exporting port on the coast of Washington State. The harbor comprises an outer region, which crosses the bay section of Grays Harbor, and the inner section, which follows the Chehalis River. The navigation channel presently can accommodate lumber ships only up to 85 ft in beam...

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Bibliographic Details
Main Authors: Hewlett, J C, Eagles, Kathren M, Huval, Carl J, Daggett, Larry L
Format: Report
Language:English
Subjects:
BASINS(GEOGRAPHIC)
BAYS
BOAT AND SHIP SAFETY
BRIDGES
CHANNELS(WATERWAYS)
COASTAL REGIONS
DEEP WATER
DESIGN CRITERIA
Fluid Mechanics
GRAYS HARBOR(WASHINGTON STATE)
HARBORS
HYDRAULIC MODELS
INTERNAL
LUMBER
MANEUVERABILITY
NAVIGATION
Physical and Dynamic Oceanography
PILOTS
RAILROADS
REGIONS
SHIPS
SIMULATION
WASHINGTON(STATE)
WATER FLOW
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Description
Summary:Grays Harbor is a log exporting port on the coast of Washington State. The harbor comprises an outer region, which crosses the bay section of Grays Harbor, and the inner section, which follows the Chehalis River. The navigation channel presently can accommodate lumber ships only up to 85 ft in beam and 43 ft in draft because of the very constricted railroad and highway bridge spans that cross the inner part of the harbor. Local economic interests desire to bring wider and deeper lumber ship into the harbor. To accommodate this change, the US Army Engineer District, Seattle, recommended widening and deepening the channel to allow ships up to 100 ft in width and 36.5 ft in draft. The existing 125-ft navigation span through the bridges is to be increased to 185 ft by replacing the railroad bridge with a new design. The proposed changes also call for the construction of a new turning basin at the upstream end of the deepwater project. This report presents results of numerous ship simulation tests in the inner as well as the outer region of the harbor. The primary navigation difficulties experienced by the pilots were the outer region bends and the inner region sharp turns and bridge passage.