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SR 520 Program - Library - Technical Documents

This page contains technical and legislative reports, as well as legislation related to the SR 520 corridor. The documents are listed in chronological order.


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

 

Environmental reports Date
SR 520 Sustainability Report (pdf 5.83 mb) January 2014
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Memorandum on Vibration Impacts on Existing Slopes - Geotechnical Review and Evaluation (pdf 936 kb) October 2013
SR 520 Floating Bridge and Landings Project Annual Sustainability Data Report (pdf 3.26 mb) July 2013
Final Construction Noise and Vibration Report SR 520, I-5 to Medina: Bridge Replacement and HOV Project Final Construction Noise and Vibration Report (pdf 6.9 mb) March 2013
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Final Aquatic Mitigation Report
     Part 1 (pdf 9.0 mb)
     Part 2 (pdf 8.9 mb)
     Part 3 (pdf 14.8 mb)
     Part 4 (pdf 9.7 mb)
December 2011
(Revised February 2012)
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Final Wetland Mitigation Report
     Part 1 (pdf 4.0 mb)
     Part 2 (pdf 3.4 mb)
     Part 3 (pdf 5.9 mb)
December 2011
(Revised February 2012)
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Draft Aquatic Mitigation Report (pdf 15.74 mb) August 2011
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Draft Wetland Mitigation Report (pdf 11.43 mb) August 2011
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Geomorphology and Shoreline History of Lake Washington, Union Bay, and Portage Bay Technical Memorandum
     Part 1 (pdf 7.32 mb)
     Part 2 (pdf 9.41 mb)
August 2011
SR 520, I-5 to Medina Bridge Replacement and HOV Project Record of Decision August 2011
Section 106 Technical Report 

Volume 1 of this report contains sensitive cultural resources information that is exempt from public disclosure pursuant to provisions of the Public Records Act (RCW 42.56.300). The Final EIS Cultural Resources Discipline Report contains all information from Volume 1 of the Section 106 Technical Report that is available for the public.

Summary and Introduction  (pdf 2.79 mb)

Vol. 2 - Built Environment
     Chapter 1 - 5 (pdf 5.76 mb)
     Chapter 6 a (pdf 5.76 mb)
     Chapter 6 b  (pdf 5.51 mb)
     Chapter 6 c - 9  (pdf 1.88 mb)

Technical Report Vol. 2 - Built Environment Appendices Part 1
     Part 1 a  (pdf 2.48 mb)
     Part 1 b  (pdf 6.55 mb)
     Part 1 c  (pdf 4.41 mb)
     Part 1 d  (pdf 5.67 mb)
     Part 1 e  (pdf 3.75 mb)
     Part 1 f  (pdf 5.03 mb)
     Part 1 g  (pdf 4.37 mb)
     Part 1 h  (pdf 4.83 mb)
     Part 1 i  (pdf 5.31 mb)
     Part 1 j (pdf 5.42 mb)
     Part 1 k  (pdf 4.96 mb)
     Part 1 l  (pdf 4.77 mb)
     Part 1 m  (pdf 4.89 mb)
     Part 1 n  (pdf 4.73 mb)
     Part 1 o  (pdf 4.40 mb)

Technical Report Vol. 2 - Built Environment Appendices Part 1
     Part 2 a  (pdf 5.10 mb)
     Part 2 b  (pdf 5.36 mb)
     Part 2 c  (pdf 5.31 mb)
     Part 2 d  (pdf 5.59 mb)
     Part 2 e  (pdf 5.79 mb)
     Part 2 f  (pdf 5.29 mb)
     Part 2 g  (pdf 5.90 mb)
     Part 2 h  (pdf 5.63 mb)
     Part 2 i  (pdf 5.70 mb)
     Part 2 j  (pdf 5.08 mb)
     Part 2 k  (pdf 6.94 mb)
     Part 2 l  (pdf 5.86 mb)
June 2011
I-5 to Medina Final Environmental Impact Statement SR 520, I-5 to Medina: Bridge Replacement and HOV Project Final Environmental Impact Statement June 2011
Appendix E - Standards and Guidance Referenced in the SR 520, I-5 to Medina Bridge Replacement and HOV Project–Section 106 Programmatic Agreement

1. Programmatic agreement among FHWA, ACHP, WSDOT, and DAHP implementing the Federal-Aid Highway program in Washington State  (pdf 155 kb)

2. Crime prevention through environmental design  (pdf 68 kb)

3. Seattle Parks and Recreation Olmsted Park Furniture Standard (pdf 567 kb)

4. DAHP recordation standards for structures (pdf 60 kb)

5. Secretary of the Interior's Standards and Guidelines for the Treatment of Historic Properties (pdf 59 kb)

6. Context-sensitive solutions in transportation planning (pdf 27 kb)

7. Seattle Right of Way Manual - City of Seattle standards about street trees (pdf 72 kb)

8. WSDOT Standards Specifications Manual (pdf 5.08 mb)

9. WSDOT Roadside and Site Development - WSDOT revegetation standards (pdf 20 kb)

10. DAHP guidelines on archaeological data collection (pdf 3.56 mb)

11. WSDOT's Unanticipated Discovery Plan - Plan and Procedures for the Unanticipated Discovery of Cultural Resources and Human Skeletal Remains (pdf 29 kb)

12. City of Seattle requirements concerning noise variances (pdf 111 kb)

13. WSDOT policy and procedures on consultation about noise walls (pdf 228 kb)

14. WSDOT Environmental Procedures Manual  (pdf 9.9 mb)

15. WSDOT No idle and fuel conservation policy (pdf 364 kb)

16. WSDOT environmental compliance assurance guidance (pdf 31 kb)

April 2011
SR 520 I-5 to Medina Project Section 6(f) Environmental Evaluation Frequently Asked Questions (pdf 252 kb) February 2011
SR 520 Pontoon Construction Project Record of Decision January 2011
SR 520 Pontoon Construction Project Final Environmental Impact Statement   December 2010
SR 520, I-5 to Medina: Bridge Replacement and HOV Project
Environmental Evaluation of Section 6(f) Replacement Sites
 (2.5 mb)
November 2010
SR 520 Pontoon Construction Project Draft Environmental Impact Statement Summary of Comments (pdf 3.45 mb) July 2010
AKART and Water Quality Studies for SR 520 Replacement Floating Bridge approval letter (pdf 145 kb) June 2010
SR 520 Pontoon Construction Project Draft Environmental Impact Statement     May 2010
SR 520, Medina to SR 202: Eastside Transit and HOV Project
Finding of No Significant Impact
 
May 2010
SR 520, SR 202: Eastside Transit and HOV Project Final Wetland Mitigation Report April 2010
SR 520, SR 202: Eastside Transit and HOV Project Final Wetland Mitigation Report Evans Creek Mitigation Site Addendum April 2010
AKART and Water Quality Studies for SR 520 Replacement Floating Bridge (pdf 7 mb)     April 2010
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Supplemental Draft Environmental Impact Statement Summary of Comments  (pdf 2 mb)



 
April 2010
Eastside Project Environmental Assessment Comment Summary SR 520, Medina to SR 202: Eastside Transit and HOV Project Environmental Assessment Summary of Comments  (pdf 423 kb) February 2010
SR 520, I-5 to Medina: Bridge Replacement and HOV Project Supplemental Draft Environmental Impact Statement          January 2010
SR 520, Medina to SR 202: Eastside Transit and HOV Project Environmental Assessment   December 2009
Pontoon Construction Project EIS Scoping Comments Report Addendum  (pdf 68 kb)
April 2009
Pontoon Construction Project EIS Scoping Comments Report (pdf 57 kb)

Pontoon Construction Project Public Scoping Meeting
March 2009
2008 Fish Tracking Study Report Cover Movement and Habitat Use of Chinook Salmon Smolts,
Northern Pikeminnow, and Smallmouth Bass Near the
SR 520 Bridge
(pdf 6.2 mb)
October 2008
SR 520 Health Impact Assessment report cover SR 520 Health Impact Assessment (pdf 2.6 mb) October 2008
Pontoon Construction Project Public Scoping Meeting Comment Summary (pdf 68 kb) January 2008
SR 520 Bridge Replacement and HOV Project Draft EIS Public Comment Report December 2006
Draft Environmental Impact Statement report cover SR 520 Bridge Replacement and HOV Project Draft Environmental Impact Statement
August 2006

 

Finance reports Date
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




Design and miscellaneous reports Date
West Approach Bridge North Project - Summary of Summer Outreach 2013 (pdf 381 kb) August 2013
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
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



Monthly construction progress reports Date
January 2014 SR 520 Construction Progress Report (pdf 1.25 mb) January 2014
December 2013 SR 520 Construction Progress Report (pdf 1.50 mb) December 2013
November 2013 SR 520 Construction Progress Report (pdf 2.09 mb) November 2013
October 2013 SR 520 Construction Progress Report (pdf 2.06 mb) October 2013
September 2013 SR 520 Construction Progress Report (pdf 1.6 mb) September 2013
August 2013 SR 520 Construction Progress Report (pdf 1.4 mb) August 2013
July 2013 SR 520 Construction Progress Report (pdf 1.4 mb) July 2013
June 2013 SR 520 Construction Progress Report (pdf 1.5 mb) June 2013



Legislation related to the SR 520 corridor Date
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