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.

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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.

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What caused the rollover is being investigated.