UP 4015 is the SD70M that is frequently assigned the duty of traveling with UP 4014, the Big Boy. However, this is not that same SD70M. When Union Pacific chose an SD70M to repaint as UP 1616 (the Abraham Lincoln unit), they chose to repaint UP 4015. About a year ago, UP decided to renumber UP 4392 as a "new" UP 4015. It received a fresh paint of coat in UP's newest scheme to go along with its new number.
On this Sunday morning, it was sitting amongst a string of half dozen SD70Ms, all waiting to head to Cheyenne. The other SD70Ms are likely headed for long term storage. UP 4015 is probably just headed back to the roundhouse in Cheyenne to serve with UP 4014 again in the future. I always appreciate how good units look in fresh paint!
