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Seattle Multimodal Terminal at Colman Dock Project

project status: design

Passengers walking at Colman Ferry Terminal 
Over 5 million foot passengers used the Seattle Ferry Terminal in 2015.

A bankia infestation in the Colman Ferry Dock trestle A shipworm infestation in the north trestle.


August 2016

Project Update 
  • The project is currently in the final design stage with construction expected to begin in summer 2017.
  • Check out the project library to view the latest design and construction information shared during spring and summer outreach events.
  • The next rounds of public outreach are planned for later this year and in spring 2017.


Washington State Ferries (WSF), the Federal Highway Administration (FHWA), and the Federal Transit Administration (FTA) are planning a project to replace the aging and seismically vulnerable components of Colman Dock in Seattle in order to maintain ferry service in the future.

Why is WSDOT considering replacing the Seattle Multimodal Terminal at Colman Dock?

Colman Dock in Seattle is WSF’s largest ferry terminal and supports transportation across Puget Sound between downtown Seattle and communities in Kitsap County. It serves general and commercial purpose traffic, high occupancy vehicles, transit, bicyclists and pedestrians. In 2015, more than 9 million total riders traveled through Colman Dock with an additional 500,000 riders using the King County Water Taxi. This total includes over 5 million foot passengers.

The project’s purpose is to preserve the transportation function of an aging, deteriorating and seismically-deficient facility to continue providing safe and reliable service. The project will also address existing safety concerns related to conflicts between vehicles and pedestrian traffic and operational inefficiencies.

The End Result

Key project elements include:

  • Replacing the timber trestle portion of the dock with a new concrete and steel trestle
  • Replacing the main terminal building
  • Reconfiguring the dock layout to provide safer and more efficient operations
  • Replacing the vehicle transfer span and the overhead loading structures of Slip 3
  • Replacing vessel landing aids
  • Constructing a new entry building, upper level pedestrian connections and view platform
  • Maintaining a connection to the Marion Street Bridge
  • Replacing the passenger-only ferry facility on the southern edge of Colman Dock with local funding from King County
  • Adding a new bicycle entry and holding area north of Marion Street
  • Mitigating for additional overwater coverage* 

WSF, FTA and FHWA will continue to coordinate closely with other Seattle waterfront projects, including the Elliott Bay Seawall Replacement project, Waterfront Seattle program, and Alaskan Way Viaduct Replacement Program throughout design and construction.

*While avoidance and minimization of new overwater coverage was a key goal of the project, the new facility will increase the overwater footprint by approximately 5,200 square feet. Mitigation for this increase in overwater coverage will be achieved by removing overwater coverage from a neighboring pier owned by WSDOT.

Project Benefits

The project will:

  • Ensure that the Colman Dock facility can continue to provide, safe, reliable and efficient ferry service between Seattle and communities in Kitsap County and the Olympic Peninsula
  • Improve safety by meeting current seismic standards
  • Reduce conflicts between vehicles, bicycles and pedestrians to improve operational efficiencies
  • Improve pedestrian circulation, connections to Alaskan Way and accessibility
  • Remove 7,400 tons of creosote-treated timber piles from Elliott Bay
  • Open up an area of shoreline and near-shore habitat
  • Provide stormwater treatment for all new and replaced areas of the trestle
  • Provide opportunities for remediation of contaminated sediments

What is the project timeline?

  • 2012-2015 – Environmental process/preliminary design
  • 2015-2017 – Final design and permitting
  • 2017-2023 – Construction

Financial Information

$320 million dollars in federal, state and local funding has been appropriated for the project.

How can I get more information?
Elizabeth Faulkner
Project Communications

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