Cost and tolling summary report, January 2010 (pdf 2.4 Mb)
Environmental review documents - draft and final EIS's, SEPA checklists.
Project history report, September 2009 (pdf 4.5 Mb)
Seismic Vulnerability Analysis Report, November 2007 (pdf 3.9 Mb)
SR 99 Tunnel Project Parking Mitigation Plan, July 2012 (pdf 1.01 mb)