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A tractor-trailer rig hauling hazardous materials rolled on Interstate 80 near Coalville in Summit County on Wednesday morning.

Utah Highway Patrol spokesman Todd Johnson said the truck's driver sustained only minor injuries and was treated at the scene. However, the 7:30 a.m. crash temporarily closed both directions of travel near mile post 179 — and one of the truck's fuel tanks ruptured.

Additionally, an estimated 50 pounds of hydrogen chloride spilled, Johnson said. Hazmat personnel were dispatched to the scene near Echo Reservoir. By 6 p.m., the chemicals had been cleaned up, UHP reported.

However, traffic through the area was diverted to alternative routes until early Wednesday afternoon, when all but one lane was reopened. At 6 p.m., workers were still fixing the guardrail, which required the lane to remain closed, Johnson said.

The cause of the accident was under investigation, Johnson said.