The left tunnel goes to the opposite side of the car elevator seen on the right. There was a time when Fords were shipped by barge on the Mississippi. This freight elevator brought them from the assembly floor to river level. A separate elevator was for moving men and silica up and down.
This is what it might have looked like if a new Ford descended in the elevator with its headlights on. As seen from the Mississippi side–the opposite portal faces the sand mine.
An ajar car elevator car afar, technically.
The bottom of the elevator in the new foundry.
The only way to get to the second floor–since demolition crews punched-out the staircases and ladders leading upwards–was to climb this elevator shaft. In the lower-left corner is a blower for the foundry furnaces.