Alaskan Way Viaduct and Seawall Replacement - Library

Environmental Documents  |  Program History  |  Public Comments  |  Previous Alternatives

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The following documents provide information on the viaduct replacement program. Use the project links to the left to learn more.

Program information

• Moving Forward to Replace the Alaskan Way Viaduct January 2010 (pdf 589 kb)
• Understanding the Program's Cost and Funding January 2010 (pdf 393 kb)
• Updated Cost and Tolling Summary Report January 2010 (pdf 2.4 Mb)
• Comparison of Boston's Big Dig and the Alaskan Way Viaduct and Seawall Replacement Program January 2010 (pdf 311 kb)
• Project History Report September 2009 (pdf 4.5 Mb)

South end viaduct replacement

• Breaking ground in the south end January 2010 (pdf 480 kb)

Central viaduct replacement - bored tunnel alternative

• Learning and listening: How the bored tunnel recommendation was developed January 2010 (pdf 346 kb)
• All tunnels are not the same: SR 99 deep bored tunnel vs. the waterfront tunnel January 2010 (pdf 433 kb)
• Learning from local and international tunnel projects January 2010 (pdf 344 kb)
• Public safety a top priority in bored tunnel January 2010 (pdf 279 kb)

Safety

• Seismic Vulnerability Analysis Report November 2007 (pdf 3.9 Mb)
• Why Replace the Viaduct and Seawall? March 2007 (pdf 264 kb)

Simulations
Note: WMV files require Windows Media Player.

• The July 2009 bored tunnel video shows an early design concept for the proposed tunnel and the access that would be provided at its north and south portals. View on YouTube or download WMV file.
• The July 2009 waterfront boulevard video shows an early concept for the new Alaskan Way, which would be built in the footprint of the viaduct once it's removed. View on YouTube or download WMV file.
• The tunnel boring machine animation explains how a bored tunnel is constructed. View on YouTube or download WMV file.