CHINOOK PASS – Starting July 21 through October, crews will close State Route 410 for 30 to 40 minutes to remove loose rock from the slopes east of Chinook Pass. Drivers will experience delays from 6 a.m. to 4:30 p.m. Mondays through Thursdays and from 6 a.m. to noon Fridays. No work is scheduled Saturdays and Sundays. Drivers can access US 12 and SR 123 as alternate routes.
The Washington State Department of Transportation originally planned to close the highway for up to four hours during the week. However, the contractor, KC Equipment of Seattle, proposed shorter closures to minimize impacts to drivers.
Currently, a chip seal project along SR 410 east of Enumclaw is causing a 30-minute delay that will conclude by the end of July.
It’s a busy construction season on Chinook Pass and WSDOT offers a number of ways to be informed: