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.

• Technical and legislative reports
• Transportation reports
• Environmental reports
• Finance reports
• Design and miscellaneous reports
• Catastrophic Failure Plan
• Legislation related to the SR 520 corridor

Transportation reports		Date
	SR 520 Final High Capacity Transit Plan (pdf 3 mb)	December 2008
	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
	Draft High Capacity Transit Plan (pdf 3.7 mb)	October 2007
	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, 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
	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
	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
	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 (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
	SR 520 Bridge Replacement and HOV Project Draft Environmental Impact Statement	August 2006

 

Finance reports		Date
	SR 520 Net Revenue Forecast – September 2012 Update (pdf 601 kb)	September 2012
	SR 520 Bridge Quarterly Traffic Engineering Report and Revised Traffic and Gross Revenue Forecast (pdf 872 kb)	August 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 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
	2007 SR 520 Finance Plan   (pdf 621 kb)	January 2008
	SR 520 Toll Traffic and Revenue Technical Report - 2007(pdf 1.5 mb)	January 2008
	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
	SR 520 Expenditures to Date Summary (1997 to December 2011) (pdf 135 kb)	February 2012
	SR 520 Memorandum of Understanding with the city of Seattle (pdf 980 kb)	October 2011
	SR 520 Expenditures to Date Summary (1997 to January 2011) (pdf 352 kb)	March 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 Reduction Strategies Expert Review Panel Report (pdf 205 kb)	September 2008
	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 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 Executive Summary (pdf 40 kb) Full report (pdf 5.6 mb)	April 2006

C atastrophic Failure Plan		Date
	Catastrophic Failure Plan - Executive Summary (pdf 567 kb)	July 2008

 

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