I just thought that this would be a simple question, not diving into having to lock down the schizo-tech and answer why an evil sorcerer with an army of wolfmen would want coal. When I'm stopped at a railroad crossing, I don't wonder where those coal-cars came from and assume they're going to Michigan City.
Yes that is the level a character would interact thinking "more coal for Michigan city" or "why does Michigan have so many coal deliveries, always in my way" or more informatively "Goodness me Michigan power station is sucking down the coal this week" BUT there needs to be an underlying world design that has a good reason for coal going to Michigan, like having a power station.