4014 Big Boy steam locomotive that rumbled and hissed to ... In 2013 it was moved back to Cheyenne where a multi-year restoration put it back on the rails in time to celebrate the 150th ...

A 1.2-million-pound "Big Boy" locomotive returned Thursday to Fort ... Union Pacific re-acquired it in 2013 and began a multi-year restoration ...

There are steam locomotives, and then there’s “Big Boy.” At 604 tons and 132 feet long and with a 4-8-8-4-wheel arrangement, it is the largest, most powerful steam locomotive in the world.