The SD70ACe is the latest in the line of EMD's "70" locomotives, an evolution of the SD70MAC,
although its radiator design harkens more to that of the SD80/90 body.
The SD70ACe has been designed to fit the latest EPA standards and
regulations, and sports 4300 horsepower.
The Union Pacific has currently put in the largest
purchase order for these units, and as a display of respect for the
railroads it has incorporated, has produced six "Heritage" style
painted locomotives with road numbers designated by the year they were
merged into the UP.
The UP is one of the largest original buyers of the new SD70ACe units,
and continues to add more to its roster. Locomotive #1989 is painted in
a Denver & Rio Grande Western Heritage paint scheme, sporting the
elegant aspen gold coloring and mountain theme of the railroad as well
as the number 1989, the year the D&RGW was merged into the UP.