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SR 520 Bridge Program - Timeline

There are four main projects in the SR 520 Bridge Replacement and HOV Program. Each has its own design and environmental process. One of the four projects, the I-5 to Medina: Bridge Replacement and HOV Project, includes replacement of the SR 520 floating bridge and upgrades to SR 520 infrastructure in Seattle between I-5 and Lake Washington. 

The schedule for constructing the other segments of the corridor is pending additional funding.

 

I-5 to Medina: Bridge Replacement and HOV Project


   Floating Bridge and Landings Project


  • 2012 - Begin construction of pontoons in Tacoma.
  • 2012 - Begin construction of new floating bridge.
  • 2016 - Anticipated completion of new floating bridge.


   West Connection Bridge Project

  • 2013 - Begin construction of new bridge.
  • 2014 - Complete construction of bridge. 

  
  West Approach Bridge North Project
 

  • 2014 - Begin construction of new bridge.
  • 2017 - Anticipated completion of new bridge.



Medina to SR 202: Eastside Transit and HOV Project

  • 2008 - Conduct environmental scoping.
  • 2009 - Issue environmental assessment.
  • 2010 - Complete environmental process.
  • 2010 - Receive permits.
  • 2011 - Begin construction. 
  • 2014 - Anticipated completion of construction.

 

Pontoon Construction Project

  • 2010 - Publish draft environmental impact statement.
  • 2010 - Complete innovative pontoon construction testing effort.
  • 2010 - Issue final environmental impact statement. 
  • 2011 - Receive Record of Decision from FHWA.
  • 2011 - Begin pontoon construction in Grays Harbor.
  • 2015 - Anticipated completion of pontoon construction.

 

Lake Washington Congestion Management Project

  • 2009 - Variable tolling environmental assessment - issued June 5.
  • 2011 - Variable tolling operational.