So, I don't know where to post this but, I can't seem to find the powder river basin route. I have seen it online for railworks. I'm from Europe so I don't know if there's a region restriction because of BNSF logos. I assume its mostly UP, no?
From the info I have the route was by Railworks America not DTG http://railworksamerica.com/forum/viewtopic.php?f=7&t=19386 It uses BNSF locos so you would not be able to purchase it from DTG Peter