This quote is showing the large scale expansion and how steam power was a large part of the reason. It was the source of power that made all of this happen. I think without steam none of what happened would have happened for a long time.
Some of the problems that the city ran into while expanding was that there was a lot of rainfall a few times causing a large flood that washed away many bridges and damaged a lot of property. “Eight years later an early thaw and steady rainfall again created a similar problem. Another massive wave washed away the railroad bridges on the rivers surrounding Chicago, again with loss of life” (Pacyga, Dominic A). This quote help shows the hardships that the city encountered while trying to expand these floods both times washed away bridges making it harder for people and trains to enter the city.
“In 1880, Pullman announced the location of a new plant to the south of Chicago in the township of Hyde park.” (Pacyga, Dominic A). This quote shows the large scale expansion that is happening economically for the city. By having large factories like this help to attract the low income families because this is the kind of work they are looking for. Not only does it attract them but it also attracts the wealthy because they have the opportunity to but the factory so that they can make more