I know what you mean-like something on the tip of your tongue.
Could you be thinking of NORAD in Cheyenne Mountain in Colorado Springs?
We had Rocky Flats which was the facility that made nuclear “triggers” and it closed. The Rocky Mountain Arsenal was a storage facility.
LOL yea it’s getting really late and I’m doing this
Found Fitzsimmons army base which was for medical and Lowry but can’t find another
I have to got to bed but will close my eyes thinking it about it
AARRGGHHH
here is a list of all base closings but many of them hjave no link to them so I do not know which might be in CO
http://en.wikipedia.org/wiki/Base_Realignment_and_Closure
LOL