Two sets of four Montana Rail Link EMD SD70ACes, along with a couple of SD45s and yard switcher GP9 No. 120 gather at the engine facility at Helena, Montana, on May 23, 2011. The SD70ACes are used in helper service over the steep grades of Mullan Pass to the west.
There are times when many engines, cars or cabooses are concentrated in a location. Such sites are for storage, economic reasons, active power needs or for rebuilding. For others, wear and tear have brought their usefulness to and end.
