Representative Example: A high-voltage substation and backup generator array serving an existing data center in the Sully Square area of Herndon illustrates the scale of power infrastructure supporting data facilities in Fairfax County. The metal framing, insulators, overhead tubular buses, and switching equipment represent classic open-air substation design, positioned in front of a windowless data center building. (Note: Photo shows a Herndon facility and is not the proposed Edsall Road project in Mason District.)