(Jerry McBride/The Durango Herald via AP file) Smoke rises from the 416 Fire near Durango, Colo., as the sun sets on June 13, 2018. The U.S. Attorney’s Office filed a lawsuit on Tuesday, July 2, 2019, alleging that the fire was sparked by the Durango & Silverton Narrow Gauge Railroad. The fire burned about 85 square miles making it the sixth largest in state history.