FAA Obstruction Evaluation

If high mast poles are to be placed within approximately 4 miles of an airport, the Federal Aviation Administration (FAA) may require an Obstruction Evaluation / Airport Airspace Analysis (OE/AAA) to ensure air safety.
Notice must be filed with the FAA if requested by the FAA or when anyone proposes any of the following types of construction or alteration:
  • any construction or alteration exceeding 200 feet above ground level
  • any construction or alteration that exceeds an imaginary surface extending outward and upward at any of the following slopes:
    • 100 to 1 for a horizontal distance of 20,000 ft. from the nearest point of the nearest runway of each airport described in 14 CFR 77.9(d) with its longest runway more than 3,200 ft. in actual length, excluding heliports.
    • 50 to 1 for a horizontal distance of 10,000 ft. from the nearest point of the nearest runway of each airport described in 14 CFR 77.9(d) with its longest runway no more than 3,200 ft. in actual length, excluding heliports.
    • 25 to 1 for a horizontal distance of 5,000 feet from the nearest landing and takeoff area of each heliport described in 14 CFR 77.9(d).
  • any highway, railroad or other traverse way for mobile objects, of a height which, if adjusted upward, as defined in 14 CFR 77.9(c), would exceed a standard of 14 CFR 77.9 (a) or (b).
  • any construction or alteration located on an airport described in 14 CFR 77.9(d).
The notice may be filed electronically online with the FAA on the
FAA website
.
The FAA may request additional information such as a survey signed and sealed by a Registered Professional Licensed Surveyor (RPLS) before making a final determination.