About half of the vehicles involved in the Feb. 14 Green River tunnel fire have now been cleared by the Wyoming Highway Patrol

The crash occurred at 11:37 a.m. under a snow-dusted hill in Green River, Wyo., according to the State Transportation Department. By 5 p.m., the tunnel, which leads traffic west on Interstate 80, had been evacuated and the scene had “been contained,” the department said in a statement.

State authorities say 18 people suffered injuries and received care at a Rock Springs hospital. Meanwhile, recovery efforts continue, and traffic could flow through the unaffected side starting Thursday.