Iowa Interstate System Map (from their web site).
Westham could become Cedar Rapids. Eastwick: Peoria. Both on branches off of the mainline. Bailey Yard could be the yard at Rock Island. Norfolk Southern connects at Des Moines and Peoria, not from the yard at Rock Island, but I suppose I could fudge that in my representation. Or, BNSF (another fave) junctions at Rock Island.
Mike Condrens pic of Chinese Steam:
Interesting: from Wikipedia: A spur of the Rock Island Railroad that ran beside a small hotel in Eldon, Missouri owned by the grandmother of Mrs. Paul (Ruth) Henning also inspired the popular television show "Petticoat Junction" in the early 1960's. Ruth Henning is listed as a co-creator of the show, along with her husband Paul, who also created "The Beverly Hillbillies" and "Green Acres."