SUMMIT COUNTY, Colo. (CBS4)– A semi crash closed all westbound lanes of Interstate 70 at the Eisenhower Tunnel for more than two hours on Sunday afternoon.

The crash happened just before 4 p.m. in Summit County. All lanes reopened just after 6 p.m.

The Colorado State Patrol says the semi rolled over at mile marker 211.

During the closure drivers were urged to take Loveland Pass as an alternate route.

What caused the rollover is being investigated.