I can confirm the existence of the long-rumored Federal Rectangle Research Institute labs.
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...based on the tags: clones, doors, hallways, radiators, reflections, windows...
Found in one of the rooms that hosted an inpatient chemical dependency unit in its later years. Connect the dots yourself.
Water turned the taconite powder into a rusty, slippery paste… everywhere the water pooled up, doubling the beauty from certain special angles.
The Barker turning around before it backed into Tac Harbor to unload coal for Minnesota Power.
This old ward, not a victim of remodeling, still has metal screens over the open windows of the doors. It should be obvious why glass were not used.
The Blacksmith Shop (right) was connected to the Bunk House (left) via this narrow walkway. This is likely due to the fire risk in each building. The left building had a cooking stove and furnace for heat and the right building had a small industrial furnace to repair mining equipment. A little walkway would mean that a fire on one side would be easier to fight from the other.
The pits have long since been filled so the roundhouse could be used for storage.
An observation room, possibly for children, has drapes around a 2-way mirror. You know, to dress up the fact that someone could be watching anonymously on the other side.
The north side of the plant is modern 60s industrial architecture, meaning massive open spaces with no personality. This mirror is the most interesting thing I could find.