That source proves a real mountain complex. It does not prove that the complex connects to every other underground legend attached to DUMBs.
The Raven Rock route works differently. The available Department of Defense instruction is partly redacted, but it still matters. It identifies the Raven Rock Mountain Complex as a managed DoD facility, assigns command responsibilities, discusses space allocation, budgetary resources, capital improvement projects, information technology, telecommunications, tenant support, security, force protection, and common services. The redactions show security limits; the visible text shows institutional reality.
Mount Weather is another continuity receipt. DHS testimony in 2014 described the Mount Weather Emergency Operations Center as a 564-acre DHS facility west of Washington, D.C., providing infrastructure for continuity planning, incident management, classified programs, and all-hazards activities. That is not internet folklore. It is budget testimony.
The Greenbrier route adds a public-history lesson. The National Park Service describes a secret Cold War bunker under the hotel, built so all 535 members of Congress could evacuate there after a nuclear attack on the capital. It remained hidden until a 1992 Washington Post article exposed it, and the government ended its lease in 1995.
The Greenbrier case is why blanket dismissal fails. A secret congressional bunker really did exist under a luxury resort. The fact that it existed does not validate every underground claim. It shows the correct evidentiary standard: a site, a mission, a timeline, records, witnesses, exposure, and eventual public confirmation.