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
	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
	Bridge Replacement and HOV Project Draft Environmental Impact Statement Cover and Table of Contents (pdf 427 kb) View the rest of the Bridge Replacement and HOV Project Draft Environmental Impact Statement.	August 2006

 

Finance reports		Date
	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
	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

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

 

Legislation related to the SR 520 corridor		Date
House Bill 2211 (pdf 42 kb)		April 2009
House Bill 5352 (pdf 1.37 mb)		April 2009
House Bill 1272 (pdf 69 kb)		April 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
Engrossed Substitute Senate Bill 6099 (pdf 24 kb)		April 2007