In order to prevent obstructions to safe aircraft navigation, the Airport Authority regulates the maximum height of all structures within the Airport Overlay District. In accordance with this provision, those wishing to obtain building permits within the Airport Overlay District may be required by Metro Government's Department of Codes and Building Safety to contact the Airport Authority (615-275-1446) for sign-off.

In addition, Federal Aviation Regulation Part 77, Objects Affecting Navigable Airspace, establishes standards and notification requirements for objects affecting navigable airspace. Examples of objects that may affect navigable airspace include buildings, communication towers, antenna structures, temporary construction cranes, etc.

Notification as required by Part 77 serves as the basis for:

• Evaluating the effect of the construction or alteration on operating procedures
• Determining the potential hazardous effect of the proposed construction on air navigation
• Identifying mitigating measures to enhance safe air navigation
• Charting of new objects

Notification allows the Federal Aviation Administration (FAA) to identify potential aeronautical hazards in advance, thus preventing or minimizing the adverse impacts to the safe and efficient use of navigable airspace. Notification, if required, is accomplished by completing and submitting an FAA Form 7460-1, Notice of Proposed Construction or Alteration.

All On-Airport construction should be directly coordinated with the Airport Authority.

FAA Advisory Circular 70/7460-2K, Proposed Construction or Alteration of Objects that May Affect the Navigable Airspace, is a publication that provides information to persons proposing to erect or alter an object that may affect the navigable airspace. The publication explains and illustrates the requirement to notify the FAA before construction begins and the FAA's responsibility to respond to these notices in accordance with the requirements of Federal Aviation Regulation Part 77.