Your go-to resource for SR 520 highway construction updates and community construction management information.
No closure of the SR 520 mainline currently scheduled.
How to use this page:
Note: This tool is presented for planning purposes only. Construction work is inherently dependent on weather and other factors, and activities are subject to change.
Community Construction Management Plans
Our Community Construction Management Plans (CCMP) outline how the public can provide ongoing input into construction decisions that help to avoid, minimize, and/or mitigate the effects of construction activities on historic and other properties. The plans also guide the actions of our hired construction contractors, describe best management practices they are to follow, and provide opportunities for WSDOT to keep the public informed and gather input that improves our construction practices.
Click on these links to read our CCMPs for individual SR 520 construction projects: