A crash involving a military convoy shut down westbound Interstate 90, west of Snoqualmie Pass near Franklin Falls, on Wednesday afternoon.
Troopers said the crash involved two trucks from a military convoy.
One truck rolled and landed on its side, leaving the windshield shattered.
Washington State Patrol troopers said the brakes of one of the trucks failed, but no one was hurt.
The mess is expected to take some time to be cleaned.
Troopers estimated it could take up to an hour and a half until the lanes reopen.
The crash is under investigation.