In 1967, my uncle (in the Air Force) was knew he would have a duty cycle in Thailand, doing missions into N Viet Nam. So he got everything set up, bought a new Caprice for them, etc. so she would be "set" in case he didn't come back. One of his "psych-up" deals was that he got us a private tour of an active "bunker" near where he was stationed at the time. So we all had to have a security clearance in order to go, which he arranged.
We drove to where he was stationed on a Friday. On Saturday morning, we went to the base, picked-up the "officer with the map book", and then proceeded to "the silo", which looks like the one pictured. Once there, the officer had to contact the base to contact the officers in the silo, so one could come up to open the door and gate. That officer said they were prohibited from going "up" to check anything out that happened to trip the alarm, even if it was a bird flying by, somebody from the base had to come out and check it out for them.
We went down the elevator to their office and such. Looked like everything had 15 coats of paint on it! One of their periodic maintenance items, it seemed. All electronics had redundancy in the room. Except the Red Buttons to set things off. There was a laser beam which had to be maintained to a window on the side of the rocket. If it was interrupted, automatic deployment, no matter what. Those massive coil springs are really BIG, as they are supposed to cushion everything from the shock of the rocket leaving. After enjoying their excellent hospitality, we took the officer back to base and were requested to not tell anybody where it was. Of course, the map had many turns in it to follow the prescribed route to get there. Of course, since we weren't from that area and had no other interest in it (than my uncle being based up there for a while), we agreed.
It was a pretty neat tour, especially back then! I think that many "target material" metro areas had a cluster of these places around them. In the DFW area, we had/have many defense contractors, so there were some down here, too. A friend moved into a then-new area (farm land, formerly). I went to visit one day years ago. When I was driving around the area, I noticed some de-commissioned silo areas. Chain link fence, "guard shack", crushed stone, just like what we'd seen "back then" and like the picture above. On a manufactured hill of sorts. I think that after they removed the rockets, they filled the whole "hole" with crushed stone?
Thanks for posting and the pictures!
CBODY67