Could anyone advise operation dates of UP 3985 into Chicago area? It is to pull an excursion to Milwaukee on 15 June, possibly another 16 June. I would like to know what days the train will operate into and out of the Chicago area and whether from the west on the former C&NW line or from the south on the former MoPac (former C&EI) line. Any assistance will be greatly appreciated, for I hope to get to a couple of locations for photography. Thanks