Entrance to underground.

Main gate

AUTOVON test board decal.

USGS aerial photo.
 

                From the DISA Manual:   The Dranesville, VA Network Management Center (NMC) supports the
                Global Operations and Security Center (GOSC) in the Western Hemisphere.  This facility, owned
                 and operated by AT&T, maintains near-real-time network information.  Within the constraints
              imposed by the GOSC, the Network Management Center (NMC) directs the implementation of network
                 control procedures in the Western Hemisphere switching centers.  The Dranesville NMC may
                   implement up to 100 percent directionalization and alternate route cancellation without
              consulting the GOSC.  The GOSC must approve other network controls before AT&T implementation.
                The AT&T NMC reports to the GOSC any significant commercial landline cable, carrier system, or
                  other facility failures affecting DSN circuits.  AT&T also reports any condition that could
                 result in major service interruptions.  The GOSC has direct control over the Panama and Alaska
                                switches for network management administration.