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

9/29/2023 - 10/2/2023

Next highway closure: SR 520 closed across Lake Washington 9/29 - 10/2; SR 520 Trail open more...

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.

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