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far_part_77 - FAR Part 77 Obstructions to Navigation Dr A A...

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CEE 4674 - Airport Planning and Design 1 of 28 FAR Part 77 - Obstructions to Navigation Dr. A. A. Trani Associate Professor of Civil Engineering Virginia Tech CEE 4674 Airport Planning and Design
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CEE 4674 - Airport Planning and Design 2 of 28 Outline of this Presentation Obstructions to navigation around airports Discussion of FAR Part 77 Examples Status of airports in NAS
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CEE 4674 - Airport Planning and Design 3 of 28 FAR Part 77 Basics Objects affecting navigable airspace Federal Aviation Regulation Part 77 “Federal Regulation 49 CFR Part 77 establishes standards and notification requirements for objects affecting navigable airspace.” Available on the web at: - http://www.mopilots.org/legislation/Part77.htm
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CEE 4674 - Airport Planning and Design 4 of 28 What is the Issue? Evaluates the effect of the construction or alteration on operating procedures Determines the potential hazardous effect of the proposed construction or alterations on air navigation Identifies mitigating measures to enhance safe air navigation Charts new man-made or natural objects. FAR Part 77 allows the “FAA to identify potential aeronautical hazards in advance thus preventing or minimizing the adverse impacts to the safe and efficient use of navigable airspace”
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CEE 4674 - Airport Planning and Design 5 of 28 FAA Reponses Once the FAA as completed an aeronautical study, a determination is made regarding the impact to air navigation. One of three responses is typically issued: No Objection - “The subject construction did not exceed obstruction standards and marking/lighting is not required. “ Conditional Determination - “The proposed construction/ alteration would be acceptable contingent upon implementing mitigating measures (marking and lighting, etc.) “ Objectionable - “The proposed construction/alteration is determined to be a hazard and is thus objectionable. The reasons for this determination are outlined to the proponent.” Source: FAA Part 77
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CEE 4674 - Airport Planning and Design 6 of 28 Obstructions to Navigation An object constitutes an o bstruction to navigation if: If 200 ft. above ground level or 200 ft. above the airport elevation (whichever is greater) up to 3 miles (for runway lengths > 3200 ft.) from the airport. - Increase 100 ft. every mile up to 500 ft. at 6 miles from the ARP (airport refrence point) Is 500 ft. or more above ground level at the object site If penetrates an imaginary surface (a function of the precision of the runway) If penetrates the terminal obstacle clearance area (includes initial approach segment)
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CEE 4674 - Airport Planning and Design 7 of 28 Obstructions to Navigation If penetrates the enroute obstacle clearance area (includes turn and termination areas of federal airways)
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CEE 4674 - Airport Planning and Design 8 of 28 FAR Part 77 Imaginary Surfaces Primary = aligned (longitudinally) with each runway and extends 200 ft. from each runway end Approach = longitudinally centered with the runway
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