416 fire

The Durango and Silverton Narrow Gauge Railroad Co. started the 416 Fire with one of its coal-fired engines, the U.S. Forest Service announced Tuesday. U.S. Attorney Jason Dunn filed a lawsuit on behalf of the Forest Service in the District of Colorado.

June 1 will mark the one-year anniversary of the 416 Fire starting north of Durango in the San Juan National Forest. The fire burned 54,000 acres — an area larger than Mesa Verde National Park — and took two months to be contained.

But even with that one-year anniversary coming up, one question lingers: What started the 416 Fire?