While these types of facilities are not new, they are significant when one considers the proliferation of nuclear, chemical, and biological weapons.

The problem is that deeply buried facilities can be used by rogue governments to manufacture and store weapons of mass destruction (WMD), as well as house the critical command and control and governmental functions that are central to the successful prosecution of a war.

It is unfortunate that, with the exception of nuclear weapons, the current technologies for locating and neutralizing these types of facilities may not be sufficient for holding these facilities at risk.

The purpose of this study is to outline the difficulties that are involved in locating and neutralizing deeply buried facilities, and suggest alternate methods and technologies, other than nuclear weapons or advanced conventional weapons, for holding these targets at risk.

This study describes deeply buried facilities and their typical functions, assesses their vulnerability, and presents ideas for neutralizing these facilities with non-conventional means.

The broad objective of this study is to ensure that U S national and military objectives can be achieved in contingencies that involve deeply buried facilities.

This concept was successfully tested by through an experiment that used untrained families, who built expedient shelters during winter in Colorado, summer in Utah, and spring in Florida. Their efforts are presented in this report primarily by the captioned photographs showing these typical American families evacuating their homes, driving to rural, shelter building sites, and then, with hand tools, constructing their shelters.

These average, mostly urban, American families were guided only by step–by–step, well illustrated, written instructions given to them at the start of each experiment. Crisis conditions were simulated, and adequate motivation was provided by the promise of a cash bonus for completion of the shelter within 36 or 48 hours, depending on the difficulty of construction. All families, or groups of families, succeeded in winning the bonus, with one exception.

The shelters built by the families included the Door–Covered Trench Shelter, the Log–Covered Trench Shelter (which the family occupied for 77 hours without emerging), and the Car–Over–Trench shelter. Also, families are pictured while building four above–ground shelters designed for high–water–table or shallow–soil areas: the Above–Ground Door–Covered Shelter, the Crib–Walled Shelter, the Ridge–Pole Shelter, and the A–Frame Pole Shelter. These four above–ground shelters have protection factors in the range of 250 to 500.

The building in Alabama of a 50–occupant Log–Covered Trench Shelter, with 22ft logs roofing a bulldozed trench, is illustrated and described, an the delays and inefficiencies of mechanized shelter–building during a rainy spell are noted.

This article makes for some, not only interesting  but extremely valuable reading. You never know when you may need this information.