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 October 2009 (pdf 672 kb)
• Understanding the Program's Cost and Funding October 2009 (pdf 361 kb)
• Equal Opportunities in Construction September 2009 (pdf 424 kb)
• Comparison of Boston's Big Dig and the Alaskan Way Viaduct and Seawall Replacement Program June 2009 (pdf 320 kb)
• Project History Report September 2009 (pdf 4.5 Mb)

Safety

• Alaskan Way Viaduct Automated Closure System October 2009 (pdf 487 kb)
• Seismic Vulnerability Analysis Report November 2007 (pdf 3.9 Mb)
• Why Replace the Viaduct and Seawall? March 2007 (pdf 264 kb)

South end viaduct replacement

• Breaking ground in the south end June 2009 (pdf 482 kb)

Central waterfront viaduct replacement - bored tunnel alternative

• Learning and listening: How the bored tunnel recommendation was developed June 2009 (pdf 354 kb)
• Access to northwest Seattle with the bored tunnel February 2009 (pdf 1.7 Mb)
• Access to West Seattle with the bored tunnel February 2009 (pdf 2.1 Mb)
• All tunnels are not the same: SR 99 deep bored tunnel vs. the waterfront tunnel June 2009 (pdf 395 kb)
• Learning from local and international tunnel projects May 2009 (pdf 374 kb)
• Public safety a top priority in bored tunnel June 2009 (pdf 288 kb)