UP 4014, the Big Boy is 132 feet and 9 inches in length. It was built by the American Locomotive Company (ALCO) in 1941. A total of 25 Big Boys were built for Union Pacific between 1941 and 1944.
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UP 4014 back up west on the Limon Sub, running around the south leg of the wye, entering into UP's 36th Street Yard. It has to run around this wye so it can head back north to the UP Jct and run west across the Belt Line. Unfortunately, the north leg of the wye at UP Jct is too tight, so the Big Boy cannot run around it.
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Right at Pullman Jct, UP 1616 passes by as UP 4014 and the passenger special make a reverse move from the Limon Subdivision back into 36th Street Yard. The train has wyed so it will be pointed north. UP 1616 was originally UP 4015, which had been paired with UP 4014 since it was restored to operation. Same unit now, just a new number and paint scheme!
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