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SR 520 – Portage Bay Bridge and Roanoke Lid Project – Construction effects & resources

What neighbors can expect during construction

Over the Portage Bay project’s six years of construction, neighbors living close to the construction area will experience varying levels of increased noise, vibration, dust, light, and traffic. Because this a design-build contract—meaning the contractor both completes the final design and constructs the project—the construction schedule and sequencing will be determined by the contractor we select next year.

Check out the following pages to learn more about what you can expect and what resources are available to you.

Aerial photo of SR 520 looking east, with the Portage Bay Bridge in the background
Aerial photo of SR 520 looking east, with the Portage Bay Bridge in the background