I had mine. In case we needed to go to our blast shelters at North Glastonbury, MT. Ours was called the Capstone Project shelter and had 3 levels. There was 120 people who bought a space. And I was the caretaker and secretary for the shelter, even spending a night alone in it in spring 1990.
It is still there as far as I know, but no one would go down there without having spent probably a million dollars to clean it up.