Washington State Ferries
Since 1992, EBDG has supported WSF with naval architecture and marine engineering services for a variety of large and small projects on their vessels. This includes design of the three vessel, Jumbo Mark II Class of 202-vehicle ferries, the three vessel, Kwa-Di-Tabil Class of 64-vehicle ferries and the four vessel, Olympic Class of 144-vehicle ferries. EBDG's contributions extend beyond design, as we have also been integral to the hybridization initiatives within the WSF fleet.
Hybridization of the Fleet
EBDG has supported WSF with their hybridization efforts through various strategic aspects, such as: (1) developing the Long Range Plan, which identified opportunities and benefits of fleet electrification and the costs associated, (2) preparing the System Electrification Plan, which detailed a plan for the fleet-wide deployment of hybrid electric vessels, (3) developing the initial cost-benefit analysis and comprehensive feasibility study of converting the Jumbo Mark II Class to hybrid propulsion, (4) developing a feasibility study and lifecycle cost analysis for the hybridization of the Olympic Class, and (5) supporting Vigor with functional design engineering services for the Hybrid Electric Olympic Class.
Olympic Class
EBDG was part of the owner's design team for the 144-car, 362-foot double-ended ferry for WSF. EBDG's scope of work included preparing the vessel profile and arrangements, fire zoning and insulation plans, structural analysis using finite element methodology, weight and cost estimates, fire safety analysis, and specification work. EBDG was also responsible for reviewing construction cost and completing the State Environmental Protection Analysis for the design. Four vessels have been delivered to this design, the CHIMACUM, SAMISH, SUQUAMISH, and TOKITAE.
Kwa-Di-Tabil Class
EBDG was retained by WSF to modify our previously designed ferry, ISLAND HOME, operated by The Steamship Authority in Massachusetts to fit their system needs. The hoistable car decks were eliminated and the vessel length was increased. EBDG completed the contract design for the new 64-car class and provided construction liaison during production. The propulsion system consists of two main engines with a fixed-pitch propeller and high-lift rudder, one at each end. Three vessels have been delivered to this design, the CHETZEMOKA, SALISH and KENNEWICK.
Jumbo Mark II Class
EBDG assisted in the design of the 460' Jumbo Mk II class. We modeled the lines, prepared stability calculations, examined structural vibration, and detailed the pilothouse control consoles. Three vessels have been delivered to this design, the PUYALLUP, TACOMA and WENATCHEE.