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Portage Bay Bridge and Roanoke Lid Project: Environmental Online Open House

Welcome to our online open house regarding environmental and permitting updates for the SR 520 Portage Bay Bridge and Roanoke Lid Project. The next pages will provide more information on the following:

  • A National Environmental Policy Act (NEPA) reevaluation.
  • Section 4(f) regulations, which relate to project effects on recreational and historical resources and parks.
  • The city of Seattle’s shoreline permit and the recreational mitigation WSDOT will include in its permit application.

The purpose of this open house is to:

  1. Provide SR 520 Program updates and information on upcoming Portage Bay Bridge and Roanoke Lid environmental and permitting processes.
  2. Collect your comments on the project updates analyzed in the Section 4(f) document and NEPA reevaluation. We submitted a draft Section 4(f) evaluation (PDF 8.4 MB) to FHWA in August, and we’d like your comments on the evaluation. We’ve also summarized the key points of our upcoming NEPA reevaluation, and we’d like to hear your feedback. We’ll submit the draft reevaluation with your comments to the Federal Highway Administration (FHWA) later this year.
  3. Solicit your feedback on the potential mitigation measures WSDOT will include in its shoreline permit application to the city of Seattle. Your feedback will inform our application to the city of Seattle later this year. There will be additional opportunities for review and comment of WSDOT’s application during the city’s review period, likely in early 2021.  

We’ll keep this open house online until Sept. 28 to give community members time to review the content and provide feedback.

A design rendering of a new Roanoke freeway lid over SR 520, as viewed from an overlook at 10th Avenue East. People are standing at the paved overlook, with a grassy lawn and trees on lid.
A conceptual illustration of a new Roanoke freeway lid over SR 520,
as viewed from an overlook at 10th Avenue East.

How to navigate this site

Click through the following pages to learn about the project and previous environmental processes, and view updated environmental analysis. There is an opportunity to provide your comments on each specific page along with a short survey at the end.