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Project Title & Location
SR 520 Bridge Replacement and HOV Project
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Project Description
The overall project will replace the SR 520 floating bridge and associated approaches. This project is currently funded to complete the environmental review, including an Environmental Impact Statement through the Record of Decision, early right-of-way acquisitions, and design.
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Contractor/Consultant
EIS - Parametrix Public Involvement - EnviroIssues General Engineering - HDR
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Recent Progress
Environmental and Design:
1. Received award for the Draft EIS and Executive Summary from the Puget Sound chapter of the Society for Technical Communications
2. Evaluating next phase of Environmental Documentation:
Likely a Supplemental Draft EIS to evaluate potential construction effects of building and transporting floating bridge pontoons, responding to DEIS concerns, and evaluating Westside designs (not yet determined)
3. Project design team continuing work on the design of the project alternatives
4. Conducted Expert Review workshop for pontoon construction methods
5. Completed final plans for a Quieter Pavement demonstration project on SR520. Construction in Summer 2007.
For more project information see the project web page at:
www.wsdot.wa.gov/projects/SR520bridge
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Design Construction Impacts
The anticipated start of major construction is 2011. The project has received $52 million from the 2003 Nickel Package and $500 million from the 2005 Transportation Partnership Account. This money will be used for the completion of the Environmental Impact Statement, project design, right of way purchases and to begin construction. Project construction depends on additional funding from tolling, a regional transportation investment, and other sources.
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Environmental Impacts / Compliance
A Draft Environmental Impact Statement with a thorough analysis of the project alternatives and options was issued in August 2006. The goal is to identify a preferred alternative after the public comment period.
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Impacts to Traffic
Traffic impacts in the corridor have not yet been fully determined. Pontoons for the new floating bridge will be constructed offsite and brought in through the Ballard Locks. The new floating bridge will be built to the north of the existing bridge allowing traffic to continue use the exisiting bridge during construction.
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Milestones |
Scheduled |
Attained |
Milestone Outlook |
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Start Right of Way Acquisition
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Spring 2004
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Ongoing
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Appraisals of properties east of Lake Washington are underway
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Start Environmental Permitting Process
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Summer 2005
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Ongoing
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Permitting discussions are continuing with resource agencies. No permits have been applied for or issued at this time.
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Start Project Design
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Spring 2006
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Spring 2006
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Start of project design began in spring of 2006 and will continue through completion of the design phase of the project.
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Issue Draft Environmental Impact Statement
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August 2006
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August 2006
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Draft EIS was issued in August 2006 followed by a public comment period ending in October.
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Start Construction
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Summer 2012
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Project construction is partially funded by the 2005 Transportation Partnership Account. Additional revenue is needed to begin construction. At this time construction is scheduled to being in the summer of 2012.
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