The world’s largest operating steam engine, Union Pacific Big Boy 4014, is on the East Coast of the United States for the first time in history.
It is passing through Westmoreland and Allegheny counties Saturday.
The locomotive traveled through Western Pennsylvania as it journeys westward from Philadelphia back to its home rail yard in Cheyenne, Wyo. It’s traveling along the Norfolk Southern tracks through Westmoreland and Allegheny counties…