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SR 520 - Technical Documents and Legislation

This page contains technical and legislative reports, as well as legislation related to the SR 520 corridor. The documents are listed in reverse chronological order (newest first) by type.

Environmental reports, such as Environmental Impact Statements and many draft design reports, can be found in the Environmental Documents section of the Resource Library.

Jump to a section below: 
Transportation reports
Finance reports
Miscellaneous design and other reports
Catastrophic Failure Plan
Community Construction Management Plans
Legislation related to the SR 520 corridor


Transportation reports Date
High Capacity Transit Plan report cover SR 520 Final High Capacity Transit Plan (pdf 3 mb) December 2008
2878 Final report cover Eastside Transit and HOV - Accelerated improvements to address ESHB 2878 - Final Report (pdf 1.5 mb)

Eastside Transit and HOV - Accelerated improvements to address ESHB 2878 - Technical Report (pdf 4.7 mb)
September 2008
SR 520 Draft High Capacity Transit Plan report cover Draft High Capacity Transit Plan (pdf 3.7 mb) October 2007
SR 520 Transit Station Usage Study report cover SR 520 Transit Station Usage Study
Transit Station Usage Study - Executive Summary (pdf 208 kb)
Transit Station Usage Study (pdf 1.1 mb)
August 2005

 

Finance reports Date
SR 520 Expenditures to Date Summary (1997 to December 2014) (pdf 355 kb) May 2015
SR 520 Expenditures to Date Summary (1997 to December 2013) (pdf 352 kb) May 2014
SR 520 Toll Operations & Traffic Performance Summary Report 2012 (pdf 910 kb) August 2013
SR 520 Expenditures to Date Summary (1997 to December 2012) (pdf 144 kb) March 2013
SR 520 Net Revenue Forecast – September 2012 Update (pdf 388 kb) September 2012
SR 520 Bridge Quarterly Traffic Engineering Report and Revised Traffic and Gross Revenue Forecast (pdf 872 kb) August 2012
SR 520 Expenditures to Date Summary (1997 to December 2011) (pdf 135 kb) February 2012
SR 520 Bridge Net Toll Revenue Report  (pdf 410 kb) September 2011
SR 520 Bridge Investment Grade Traffic and Revenue Study (pdf 8.95 mb) August 2011
SR 520 Expenditures to Date Summary (1997 to January 2011) (pdf 352 kb) March 2011
SR 520 Medina to SR 202: Eastside Transit and HOV Project
TIGER grant application (pdf 1 mb)





Learn more about WSDOT TIGER grants  
September 2009
SR 520 Toll Traffic and Revenue Technical Report - 2008 (pdf 995 kb) April 2009
520 Tolling Implementation Committee
Tolling Report Prepared for the Washington State Legislature
January 28, 2009 (pdf 1.75 mb)
January 2009
2007 Finance Plan report cover 2007 SR 520 Finance Plan   (pdf 621 kb) January 2008
SR 520 Toll traffic and Revenue Technical report cover SR 520 Toll Traffic and Revenue Technical Report - 2007(pdf 1.5 mb) January 2008
SR 520 Toll Feasibility Analysis report cover SR 520 and I-90 Toll Feasibility Analysis: Traffic and Revenue Forecasts Technical Memorandum (pdf 1.8 mb) May 2007
Washington Office of State Treasurer's Report on SR 520 Bridge Replacement and HOV Project Funding Alternatives
Treasurer's Letter – March 30, 2007 (pdf 32 kb)
Final Report – March 28, 2007 (pdf 904 kb)
Governor's Letter – April 3, 2007 (pdf 38 kb)
March -
April 2007
A Path Forward to Action: Findings and Conclusions for the Alaskan Way Viaduct and Seawall replacement and State Route 520 Bridge Replacement Projects (pdf 335 kb)

Governor's press conference December 15, 2006 (video)
December 2006




Miscellaneous design and other reports Date
West Approach Bridge North Project - Neighborhood Traffic Management Plan (pdf 1.3mb) March 2014
West Approach Bridge North Project - Summary of Summer Outreach 2013 (pdf 381 kb) August 2013
Seattle Community Design Process final design report (pdf 17 mb) December 2012
Seattle Community Design Process public comment summary (pdf 2.5 mb) November 2012
SR 520 Memorandum of Understanding with the city of Seattle (pdf 980 kb) October 2011
WSDOT SR 520 Bridge Community Survey (pdf 560 kb) April 2010
SR 520 Legislative Workgroup Final Recommendations Report     December 2009
2009 Fairs and Festivals Report (pdf 151 kb)     December 2009
July 2009 Eastside Consolidated Design Report Eastside Consolidated Urban Design Report (pdf 20.2 mb) July 2009
2008 Fairs and Festivals Report (pdf 598 kb) December 2008
Noise Expert Review Panel thumbnail Noise Reduction Strategies Expert Review Panel Report (pdf 205 kb) September 2008
2008 Montlake Cut Tunnel Expert Review Panel report cover Montlake Cut Tunnel Expert Review Panel Report (pdf 3 mb) June 2008
Proposal K - Tunnels at East Montlake and the Arboretrum
Conceptual Design and Cost Estimate
Part 1 - Report (pdf 1.33 mb)
Part 2 - Figures (pdf 8.76 mb)
March 2008
Corridor Design Aesthetics Handbook report cover Corridor Aesthetics Handbook: Ideas for Urban Corridor Design
Cover of handbook (pdf 1.3 mb)
Chapter 1 - Executive Summary (purpose, need and process) (pdf 1.4 mb)
Chapter 2 - Corridor Unity (pdf 5.0 mb)
Chapter 3 - Thematic Zones (pdf 11.3 mb)
Appendix A: SR 520 Bridge Replacement Project History
(pdf 215 kb)
Appendix B: Design Advisory Meeting Notes (pdf 3.8 mb)
Appendix C: Glossary of Aesthetic Design Elements (pdf 3 mb)
August 2006
I-5 to Floating Bridge Tunnel Concept Review Report Cover I-5 to Floating Bridge Tunnel Concept Review
Executive Summary (pdf 40 kb)
Full report (pdf 5.6 mb)
April 2006



Catastrophic Failure Plan Date
Catastrophic Failure Plan Exec Summary Report Cover Catastrophic Failure Plan - Executive Summary (pdf 567 kb) July 2008
 
 

Community Construction Management Plans Date
West Approach Bridge North Project (pdf 1.17 mb) December 2013
West Connection Bridge (pdf 1.87 mb) August 2013
Floating Bridge and Landings Project  (pdf 2.65 mb) March 2013



Legislation related to the SR 520 corridor Date
Senate Bill 6001 (pdf 402 kb) April 2014
House Bill 2814 (pdf 34 kb) March 2012
Senate Bill 5700 (pdf 29 kb) May 2011
Senate Bill 6392 (pdf 62 kb) March 2010
House Bill 2211 (pdf 42 kb)     May 2009
House Bill 5352 (pdf 1.37 mb)     May 2009
House Bill 1272 (pdf 69 kb)     May 2009
House Bill 2878 (pdf 320 kb) March 2008
House Bill 1773 (pdf 80 kb) March 2008
House Bill 3096 (pdf 20 kb) March 2008
Senate Bill 6099 (pdf 24 kb) April 2007