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SR 520 - Enhancing Parks and Natural Areas

About > Environmental Stewardship > Enhancing Parks

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Parks enhancements
Habitat enhancements
Historical and cultural resource enhancements
Where to learn more

The SR 520 program includes a wide range of projects to protect and enhance parks, fish and wildlife habitat, and sensitive natural, cultural and historical areas across the region. Some of these projects are completed, while others are underway or in the planning stage as part of the program’s phased construction schedule.

Parks enhancements

Within the densely populated SR 520 corridor, we work with communities to mitigate the environmental effects of our construction program, in part by making significant improvements to local parks. Some of our parks enhancements include:

Habitat enhancements

The SR 520 corridor not only includes dense urban and suburban areas, but rich and diverse natural areas as well. We are making substantial enhancements in many of these natural locations to offset the environmental effects of our reconstruction effort, including:


Historical and cultural resource enhancements

WSDOT has worked with the community to carefully assess and protect historic and cultural resources both along the SR 520 construction corridor and at other locations where components for the new floating bridge are built. Our efforts include: 


Where to learn more

Read more about how we’re promoting environmental stewardship

View an interactive map showing many of the SR 520 mitigation projects.
 
Read our complete Arboretum Mitigation Plan (pdf 2 mb) online.

Go to 520History.org to learn more about the early history of the communities along the SR 520 corridor and the later construction of the highway. 

View our SR 520 Environmental Documents library, where you’ll find environmental impact statements, mitigation reports, studies on water quality and fish, and more.