UP 6815 - UP 6629

A pair of Union Pacific GE AC4400CWs (C44AC according to UP), UP 6815 and UP 6629, head up an empty coal train, prepared to depart the Oak Creek coal yard for the Powder River Basin for another load.  Interestingly, 6815 was ordered by CNW, but was delivered as UP after UP's assimilation of CNW.  Mark W. Hintz photo, 01/16/08, Caledonia WI