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A vibrant Seattle through transportation excellence Grace Crunican, Director

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SDOT Alaskan Way Viaduct Home
City of Seattle Alaskan Way Viaduct
Alaskan Way Viaduct and Seawall Replacement Project (WSDOT)
Contracting Opportunities
Emergency Traffic Management and Closure Plan
U.S. Army Corps of Engineers
Alaskan Way Viaduct Freight Mobility
Alaskan Way Seawall
Urban Mobility Plan

The Alaskan Way Viaduct

Seattle neighborhoods will have multiple options for getting to and through downtown, as well as to surrounding communities with the bored tunnel hybrid. Click here to learn more about how the bored tunnel solution works for Ballard, Magnolia, Interbay and Queen Anne and here for West Seattle

After an open and transparent central waterfront process, Mayor Greg Nickels, Governor Gregoire and King County Executive Sims announced their recommendation that a bored tunnel, along with improvements to transit, city surface streets and the city’s waterfront, replace the Alaskan Way Viaduct along the central waterfront.

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To learn more about the agreement, please view the Letter of Agreement between the Governor, Executive and Mayor.

The central waterfront process was based on the State of Washington, King County, and the City of Seattle working together to find a solution for the central waterfront section of the viaduct. It included feedback from the Alaskan Way Stakeholder Advisory Committee, public meetings, feedback from various interest groups and nearly 1000 public comments.

To learn more about the central waterfront process, please review our step-by-step guide.

Stakeholder Advisory Committee

As part of this process, A Stakeholder Advisory Committee of 29 people representing various constituencies and community groups, including business, neighborhood, freight, commuter, environmental, and other interests was appointed to provide feedback on the process and potential solutions for the central waterfront replacement of the Alaskan Way Viaduct. The Washington State, King County, and Seattle departments of transportation (WSDOT, KCDOT, and SDOT, respectively) led the committee as a way to engage key stakeholders, listen to ideas, and conduct a transparent public involvement process for the central waterfront project. Materials reviewed at the Stakeholder Advisory Committee meetings are available online.

Stakeholder Advisory Committee Roster March 2008

Moving Forward Projects

The City of Seattle is committed to moving forward to replace the ailing Alaskan Way Viaduct and Seawall. In 2007, Mayor Greg Nickels, along with Governor Christine Gregoire and King County Executive Ron Sims, agreed to six safety and mobility improvements on the north and southern ends of the SR 99 corridor. For up-to-date information on the progress of the projects, please visit: www.wsdot.wa.gov/Projects/Viaduct/default.htm

Urban Mobility Plan

In May 2007, the Seattle City Council requested the Seattle Department of Transportation develop an Urban Mobility Plan as a solution for replacing the Alaskan Way Viaduct. The Urban Mobility Plan will use a systems approach, including enhanced transit service, surface street and highway improvements and other transportation programs and policies, and will focus on the movement of people and goods to and through Downtown, rather than maintaining vehicle capacity of the existing SR99 corridor.

SDOT is leading this effort, in close coordination with King County and WSDOT through the Partnership Process for the Central Waterfront. Click here for more information about the Urban Mobility Plan

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