Got out today and grabbed a few from the UP Clinton Sub. http://easterniarail.blogspot.com/2009/02/clinton-sub.html
I'm trying to recall- As I do not see it in your photos, the Beverly Tower was removed. But when? My memory isn't bringing that info up this morning. Do you remember when that happened? Boxcab E50
Possibly the 80's or after UP bought the CN&W in the 90's. Don't know. I may have to ask the folks at CRARA(Cedar Rapids Area Railfans Association) for the info.