The railroads that go through Altoona have made Altoona, once known as Eastern Eau Claire, a small city.  Here are a few links to more information about Altoona and the railroads.

When and why was Altoona made to be a terminal?   Link
What were the railroads used for in Altoona? Link
How did the railroads help Altoona in its development as a city? Link