Heavy steel doors to isolate the underground magnetic separation mill from Eagle Mine’s main tunnel.
“Ballistite is a smokeless propellant made from two high explosives, nitrocellulose and nitroglycerine. It was developed and patented by Alfred Nobel in the late 19th century.” -Wikipedia.
On the second floor of the kettle building where corn mash was boiled, holes where tanks once sat were everywhere.
Would you wait and risk getting flooded out, or intentionally get minor burns?
The lower door is where the rocket exhaust would flow into the blast pit during initial launch. The upper doors would vent the rocket so the erector and other equipment in the building would not be (as) damaged.
One of the few doors.
The large domed rooms were surreal.
In the ward for the criminally insane, this door was the most-worn. Nail scratches mark the area around the peep hole, the wood is gouged everywhere from thrown chairs and hard kicks, and a ominous blood-colored stain is visible where it dripped in the second inset from the bottom. Aside from the damage, the coloring in this section was very vibrant, though it was probably little reprieve for those who had to work here.