The time frame is a little off I. I was born in Feb. 1959-and he had been working there for 18 months when i was born-and stuff had been going on there a while. My father was a pipefitting foreman for Peter Kiewit and sons-one of the civilian construction/maintenance contractors.
I've met several other people that were there. I think there was more than one nuclear plant(i.e. they had some redundancy).
The security around this all was pretty serious. The construction workers often had know idea what they were working on-or the layout of the facility. I would be VERY careful about assuming the "whole story" has been told here. Some of the facilities I've heard about were more elaborate than one would anticipate for a 200 man military base-or simply an ICBM base.
If folks are seriously interested-and have questions, I can try to forward them.