Officials with Montana Rail Link responding to the second derailment in Montana this year said the company will cover clean-up costs associated with the June 24 incident that sent 10 railcars into the Yellowstone River. Crews disassembled part of the bridge in order to remove the cars still remaining in the Yellowstone. It’s unclear if a bridge collapse led to the derailment, or if the derailment led to Twin Bridge’s collapse.