Union Pacific No. 4015 (SD70M)

Union Pacific No. 4015 is an SD70M type diesel locomotive built by Electro-Motive Diesel (EMD) in June 2000 for the Union Pacific Railroad. It is one of several SD70M type diesels built for the UP between April 2000 and December 2004. It is used in regular freight service with the UP. As of July 2021, it has temporarily been assigned to the UP's steam excursion program to be used as a diesel helper mostly with UP 4-8-8-4 No. 4014, but also with UP 4-8-4 No. 844 on occasion as well. It is used behind both steam locomotives for both dynamic braking and Positive Train Control (PTC) with the UP's heritage fleet on mainline excursion runs.
Category:EMD locomotives
Category:Union Pacific locomotives
Category:Built in 2000
Category:Standard gauge locomotives
Category:Diesel locomotives
Category:Diesel-electric locomotives
Category:Freight locomotives
Category:American locomotives
Category:United States