SR 520 Construction Corner

The go-to source for information on SR 520 construction

Construction map

Want to know what SR 520 construction activities are underway or coming soon? You’ve come to the right place. The map below allows you to search by date, activity or location for detailed information about current or upcoming construction related to the SR 520 Program.

TODAY: No highway closure in effect

There are no current highway closures on SR 520. Please see the map below for current and upcoming work.

How to use this page:

  1. Select a date range to view scheduled work in any given time period
  2. Zoom in and out or pan over the map to look at SR 520 work scheduled close to your home, business, or travel route
Date range shown: (select to change)

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: