Thanks' for all your comments.
Harry - I will have to see if I can find pictures of the one at Hershey, PA Does it have any connection to the famous chocolate company?
Coloradohirailer - I think that one you are talking about is at Hutchinson, KS. That is the type that I have in mind, but not to that extent of course. They have very large elevators in central Kansas to handle all the wheat harvest. I may call mine CENTRAL KANSAS COOP.
Ricky - I used 1/4 Masonite on the bottom and illustration board or Strathmore board on the tops.
Lee - I had forgotten how dangerous elevators are with the grain dust being so explosive.
Brian - I am pretty happy with the overall looks so far and think that this will work well for this area of my layout. It was meant to be a rural area and what's more rural Midwest than big elevators? This is the country that the real UP and BNSF travel through to the west coast.
Art