Jurg, Where is that? I've got some side view photos (somewhere) of a similar facility in Tucson, AZ. Randy
I think that you can build the model out of Plastruct shapes easy enough, and use an N Scale sanding tower and other details from the Bachmann N Scale Fuel and Sanding set with great success!
Jürg, I'll send you my pix of UP's Oakland (San Francisco) yard too. Much older I'll post a few in my pix later this weekend.