This is also at the Museum. I know very little about this but this museum has something completely unique and should be preserved...
This is the description given...........
Mating and Demating Missle Training Silo
Built by Boeing, this structure is an almost identical copy of an ICBM missile silo in the field. With the exception of the concrete structure covering an access stairwell, the above-ground components are exact.
This silo was used at Chanute AFB to train maintenance and support personnel, especially in the loading and unloading (mating and demating) of missile guidance systems and warheads. To accomplish this, a specially designed trailer was positioned over the missile hatch. The hatch was then opened to allow access to the bottom of the trailer.
In the field, personnel access to the silo was made through a smaller round hatch with an adjacent locking mechanism.
Plan of Site, Photo 2 is taken from the "you are here sign"
2
3 Photos 3 and 4 show the three sections of the silo, these would all be underground..This is the bottom section.
4 Top section on the left with specially designed trailer on top, middle section on the right
5 Specially designed trailer was positioned over the missile hatch
