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FAA notification surface to require the Filing of FAA Form 7460-1. <br />b. The buildings exceeding 200 feet in height in the Specific Plan area <br />are not within the geographic area or sloping, three-dimensional 50:1 <br />FAA precision instrument Approach Surface to JWA Runway 20R <br />(the closest runway to the Project). <br />C. Penetrating a Civil Airport Imaginary Surface, like the Horizontal <br />Surface, does not in itself define a hazard. The Horizontal Surface is <br />not unequivocally airspace reserved for air navigation, it is an <br />imaginary surface used by the FAA to study whether obstructions are <br />potential hazards and whether any mitigation factors can be <br />considered (page 2-3 of FAA AC 150/5190-4B, Airport Land Use <br />Compatibility Planning). These FAA studies determine whether a <br />building poses a public safety issue or will adversely impact the <br />continued operation of the airport and other aeronautical operations. <br />1) Penetrating a Civil Airport Imaginary Surface is a trigger to file <br />a Form 7460 so that the FAA can conduct its aeronautical <br />study. The FAA, through these studies, determines whether a <br />building poses a public safety issue or will adversely impact <br />the continued operation of the airport and other aeronautical <br />operations. This is noted on Page 3-31 of the Caltrans California <br />Airport Land Use Planning Handbook: "By definition, any <br />object that penetrates one of the imaginary surfaces is <br />deemed an obstruction to air navigation. However, not all <br />obstructions are necessarily hazards. The determination of <br />whether an object would be a hazard to air navigation is made <br />as part of an aeronautical study conducted by the FAA..." <br />2) As per 14 CFR Section 77.25, "The purpose of an <br />aeronautical study is to determine whether the aeronautical <br />effects of the specific proposal and, where appropriate, the <br />cumulative impact resulting from the proposed construction or <br />alteration when combined with the effects of other existing or <br />proposed structures, would constitute a hazard to air <br />navigation." <br />3) Further, in 14 CFR Section 77.29, the regulation specifies that <br />these studies include evaluating- <br />(1) The impact on arrival, departure, and en route <br />procedures for aircraft operating under visual flight rules, <br />(2) The impact on arrival, departure, and en route <br />procedures for aircraft operating under instrument flight <br />rules; <br />(3) The impact on existing and planned public use airports <br />Resolution No. 2025-XXX <br />Page 12 of 20 <br />