Lloyd A Dua
Lloyd A. Dua served as Deputy Director of Engineering and Construction for the US Army Corps of Engineers. In a 1989 speech titled "Underground Facilities for Defense: Experience and Lessons," Dua made public statements that serve as a key official acknowledgment of classified deep underground military construction programs conducted by the Corps.
| Role | Deputy Director of Engineering and Construction, US Army Corps of Engineers |
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The 1989 Speech
In his 1989 address, Dua acknowledged that after World War II, renewed interest in underground construction led the Army Corps of Engineers to become "involved in the design and construction of some very complex and interesting military projects." He directly noted that "several of the most interesting facilities that have been designed and constructed by the Corps are still classified," deviating from the stated topic of the speech to acknowledge their existence without revealing specifics.
Dua also referenced the Cheyenne Mountain NORAD facility — stating the Corps' involvement in its construction in the 1960s — while acknowledging the existence of "other projects of similar scope which I cannot identify but which include multiple chambers up to 50 ft wide and 100 ft high" using the same excavation procedures. This statement confirms that large-scale classified underground military installations comparable in scope to Cheyenne Mountain were built by the Corps and remain classified as of 1989.
This speech is cited by UAP Gerb as one of the most direct official confirmations of a classified DUMB construction program, spanning from at least 1947 to 1989 — a 42-year window during which underground installations of unknown purpose were built for the US military.