Date:  Thursday, November 20, 2008

Contact:
Emily Fishkin, Alaskan Way Viaduct and Seawall Replacement Program, 206-267-6821 (Seattle), 206-437-5061 (cell)
Amy Grotefendt, Alaskan Way Viaduct and Seawall Replacement Program, 206-295-9846 (cell)

SEATTLE – WSDOT, King County, and the City of Seattle released conceptual cost estimates today for the elements that make up the eight scenarios being tested for the central section of the Alaskan Way Viaduct and Seawall. The eight scenarios include three surface options, two elevated options, and three below ground options on SR 99, as well as varying levels of investments in I-5, surface streets, transit, and demand management.

The conceptual estimates are best used to understand the costs associated with the building blocks that were tested in the different scenarios. These cost estimates will be used to repackage the most effective elements into two or three new hybrid scenarios.

“We will use the cost information to assess the affordability and benefits of each proposed scenario. Then, we’ll combine the most promising elements from the eight scenarios into two or three revised scenarios in the next few weeks,” said Paula Hammond, Washington State Transportation Secretary.

Cost estimates for the SR 99 building blocks for the central waterfront segment range from $800 million to $900 million for the three surface options; $1.6 billion to $2.2 billion for the two elevated options; and $1.9 billion to $3.5 billion for the three below ground options. Operating costs range from $3 million to $10 million.

Cost estimates for the other building blocks range from $195 million to $498 million for I-5 improvements; $205 million to $378 million for surface street improvements; and from no investment in streetcars to up to $641 million. Transit improvements range from $135 million to $476 million. Policies and management strategies that encourage alternatives to driving alone range from $4 million to $24 million. There are additional annual operating costs associated with the streetcar, transit, and policies and management building blocks.

“As we work toward an ultimate recommendation for the viaduct, there will be tough choices to be made as we weigh the many costs and benefits of viaduct replacement options,” said King County Department of Transportation Director Harold Taniguchi. “We’re committed to finding a comprehensive solution that improves all modes of transportation, including transit, bikes and walking.”

Scenario costs are not determined by simply adding the building block elements together, because each scenario includes different elements from each type of investment. Cost totals for the two to three hybrid scenarios will be released next month.

Other important data will be released throughout the coming weeks, including the potential economic effects each scenario may have on the region.

“We’re evaluating how well all of these components can be combined to enhance livable and walkable communities, while maintaining our regional economy,” said Seattle Department of Transportation Director Grace Crunican.

Information on historic resources, shading and view blockage, transit connections, air quality, and carbon emissions were recently shared with the Stakeholder Advisory Committee. Details are available at www.alaskanwayviaduct.org.

During the past several months, the project team has studied various aspects of the proposed elements for each scenario according to six guiding principles developed by Gov. Chris Gregoire, King County Executive Ron Sims, and Seattle Mayor Greg Nickels. The three executives will make a joint recommendation on a final alternative at the end of the year. 

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