It took the California Department of Transportation 15 years to completely rebuild 423 miles of Interstate 80, from Auburn to the Nevada state line. The renovation project, which cost $820 million, often required sections of road to be completely rebuilt. In addition, high-mountain sections of road that were deeply rutted were covered with 12-inch concrete slabs to give Caltrans "several extra inches of concrete to grind flat when ruts get deep" in the future, according to highway officials.

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