I just caught an episode of Secret Passages: The Cold War on the History International channel. One of the cold war bomb shelters profiled was a hand-made, four level, fully stocked shelter built by a Blaine, Washington Trinity Western University Professor, Kenley Snyder.
Here's an excerpt from the web link following:
Part of the plausibility conundrum inherent in describing Kenley's masterpiece is the sheer scale of the project. When most people think of a bomb shelter, they envision grainy black and white U.S. government videos of nonplussed nuclear families scurrying into a basement room the size of Amelda Marcos' walk-in shoe closet. Kenley's 2,000 square foot, four storey subterranean hangout is replete with concrete walls and floors that are one metre thick, secret passages, 13 ventilation systems, an "electromagnetic, pulse wave protected" computer room, 1,000 gallon water tank, radiation proof paint, spacious living and storage areas and two "secret" rooms—simply too big to fit the construct of the average Jane and Joe's mind without a little visual help.
If you have a chance to see a rerun, it's worth the time!
Here are a couple of pics: