Colder weather means more train time!
The end wall sections for the part of the plant running perpendicular to the original building. Also some parapet wall sections.
Here they are installed. The actual building would have been much deeper than I've built the model. The end section and parapet walls serve as a view break.
The bricked up windows and window variations give the build a sense of time passage. At the side by side brick-ups I plan to add the pre-fab structure you can kind of see in the proto photo. The top part of the brick-up will peek out above the pre-fab. Might look kind of interesting.
In one of the old postcard views there appears to be some garages next to the building and set back a bit. A Maintenance Dept. shop perhaps? I decided to assume the garages were torn down at some point and a brick addition for the Maintenance Dept. was built at the end of the main structure. Cleaner brick, different windows and galvanized steel coping call it out as newer.
I've painted out the dust collection cyclones and some other roof top equipment this evening. The end is in sight.