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Seattle Multimodal Terminal at Colman Dock Project

project status: design

Passengers walking at Colman Ferry Terminal 
Approximately 5.1 million foot passengers used the Seattle Ferry Terminal in 2014.

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


February 2016

Project Update 

  • Upcoming fieldwork near Colman Dock: Starting as soon as Jan. 25, riders at Colman Dock will see large construction equipment in the water near the ferry terminal. Crews will be conducting a geotechnical investigation by installing temporary test piles in order to help our team finalize the design and prepare for construction of the Seattle Colman Dock project. This work will occur between 7 a.m. and 6 p.m., Monday-Friday for about three weeks.
  • Environmental process complete: On November 24, the Federal Transit Administration and Federal Highway Administration determined that the project would not result in significant adverse impacts to the environment and published a Finding of No Significant Impact (FONSI). The FONSI is based upon the analysis presented in the environmental assessment (EA) and comments received from the public, regulatory agencies and Tribes. The FONSI is available in the project library. The issuance of the FONSI marks the conclusion of the project’s environmental process and allows final design work to begin.
  • General Contractor/Construction Manager selected: Earlier this fall, WSF selected a General Contractor/Construction Manager for the project, also known as a GC/CM. The selected GC/CM team of Hoffman-Pacific, a Joint Venture, will support WSF during final design and help plan for construction. Project construction is planned to begin in mid-2017 and be completed in early 2023. A reminder that ferry service at Colman Dock will be maintained throughout construction.


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 2014 alone, Colman Dock served over 9.3 million riders, including 5.1 million foot passengers. The Seattle/Bainbridge route is WSF’s busiest passenger route and has the largest annual ridership.

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
The new Seattle Multimodal Terminal at Colman Dock will improve safety by addressing concerns related to seismic vulnerability and conflicts between vehicle, bicycles and pedestrians.

Key project elements include:

  • Replacing and re-configuring the timber trestle portion of the dock;
  • 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;
  • Maintaining a connection to the Marion Street pedestrian overpass;
  • Replacing the passenger-only ferry facility on the southern edge of Colman Dock with local funding from King County;
  • 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 the design process.

*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 Peninsula;
  • Improve safety by addressing seismic vulnerability and reducing conflicts between vehicles and pedestrians;
  • Improve existing pedestrian connections to local transit service;
  • Upgrade terminal facilities to current codes and regulations, including the Americans with Disabilities Act (ADA);
  • 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

The Legislature recently approved funding to complete the project. The project is estimated to cost approximately $326 million and will be funded by a combination of federal and state funds, as well as local funds for King County's replacement passenger-only ferry facility.

How can I get more information?
Genevieve Rucki, P.E.
WSF Project Manager

Elizabeth Faulkner
Project Communications

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