This is kind of noteworthy.
The screen shot below is the route system for Union Pacific Railroad.
Note that big white empty space where all the Bakken oil, all the Montana and Wyoming coal, and all of America's wheat is located. That big white empty space (from northern Minnesota, across both North and South Dakota, all of Montana, and most of Wyoming ... yeah, that space).
That empty white space has a lot of track, also. Just not Union Pacific.
Burlington Northern Santa Fe, owned by Warren Buffett's Berkshire Hathaway.