A military structure located near Charleston, South Carolina, United States, at coordinates 32.9532067, -79.9572208. The provided web search results do not contain specific information about this site. The location is within a region with a significant military history, including coastal fortifications from the Civil War and World War II era, but no direct connection to the returned results (which discuss the Cheyenne Mountain Complex in Colorado and general National Archives resources) can be established for this precise coordinate point.
Further localized historical or archaeological research would be required to confirm the nature, purpose, and history of this specific installation.