Whatcom County

EBDG has designed a diesel-battery hybrid ferry for Whatcom County for operation between Lummi Island and Bellingham, Washington. One vessel of this design is expected to be built. In addition to this vessel design, EBDG has supported Whatcom County with on-call engineering support since 2006. During this time we have supported a variety of projects ranging from analysis and repair specifications to inspections feasibility studies for their fleet of vessels.

EBDG’s Scope

EBDG was contracted by Whatcom County to complete the design of a replacement ferry for the Whatcom Chief. This project consisted of multiple phases. Phase 1 included visits to the vessel and interviews with the staff as to operational and maintenance issues and desires. From this we determined the appropriate capacity (vehicles and passengers) for the new vessel based on projected ridership demands, terminal and environmental constraints, cost considerations and operational characteristics. We then developed a preliminary general arrangement and completed a sizing report.  Phase 2 was the Contract Design which included submission to the USCG for approval. Construction was put on hold pending funding.

EBDG developed a high-level comparison of three replacement vessel alternatives for Whatcom County’s Lummi Island Ferry. Vessel alternatives included different vehicle capacities and propulsion systems, including conventional diesel, diesel battery hybrid and diesel-electric hybrid. Our team analyzed effects of vessel alternatives on sailing schedule, passenger capacity, and crew requirements. We also provided estimated construction and operation costs for each alternative. Whatcom County Public Works reviewed the analysis and decided to move forward with a diesel battery hybrid ferry. EBDG has completed the contract design of the double-ended ferry with the alternative fuel choice.

Vessel Particulars

Whatcom County Public Works

184’

54’

USCG Subchapter T

150 passengers & 34 vehicles

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