ADO 1 Office of Airports Airport Geometrics Airports Division, Western Pacific Region

ADO 2 3 Sets of Aviation Standards Airport Imaginary Surfaces - Part 77 Airport Design Standards (A.C.s) Terminal Instrument Procedures (TERPS)

ADO 3 3 Airport Assurances -Assurance 19, Operation and Maintenance: The sponsor will not cause or permit any activity or action on the obligated airport that would interfere with its use for airport purposes. - Assurance 20, Hazard Removal and Mitigation: The sponsor will prevent the establishment or creation of any future airport hazard. - Assurance 29, Airport Layout Plan (ALP): The sponsor will not make or permit any changes to the airport or any of its facilities that are not in conformity with the FAA-approved ALP or which might in the opinion of the FAA adversely affect the safety, utility, or efficiency of the airport.

ADO 4 14 CFR Part 77 Defines “obstructions to air navigation” Requires notice to FAA prior to construction Procedures for studies and determinations Hazards to Air Navigation

ADO 5 Part 77 Imaginary Surfaces Standards for determining obstructions Applies to objects :  natural growth  terrain  permanent or temporary construction or alteration  including temporary equipment used for construction

ADO 6 Obstructions and Hazards Obstruction - any object that penetrates any of the Imaginary Surfaces Hazard - Obstruction that is determined through an airspace study to substantially affect the safe passage of an aircraft All Hazards are Obstructions Not all Obstructions are Hazards

ADO 7 FAR 77 IMAGINARY SURFACES PPrimary AApproach TTransitional HHorizontal CConical

ADO 8 Part 77 Imaginary Surfaces PrimaryApproachTransitionalHorizontalConical

ADO 9 FAR 77 IMAGINARY SURFACES (Cut-Away View) Primary Surface Transitional Surface Conical Surface Approach Surface Transitional Surface Horizontal Surface

ADO FAR 77 IMAGINARY SURFACES (Top View) Transitional Surface Horizontal Surface Primary Surface Approach Surface Conical Surface Transitional Surface

ADO Primary Surface Primary surface - Centered around runway - Extends 200 ft beyond the runway end - Width varies from 250 ft to 1000 ft

ADO Primary Surface  Width ft to 1000 ft  Length - extends 200 ft from runway end

ADO Approach Surface Begins at end of Primary Surface Inner edge - same width as Primary Surface Outer edge varies ft to 16,000ft Length varies - 5,000 or 10,000ft Slope varies - 20:1 34:1 50:1

ADO APPROACH SURFACE 30 W1 W2 length Primary Surface Runway Approach Surface 50:1 200’

ADO Road Interstate Highway Railroad Waterway 15 ft 17 ft 23 ft tallest object In computing obstruction heights, allow: a. Public Roads15 ft b. Interstate Highway 17 ft c. Railroad23 ft d. WaterwayTallest Object

ADO Transitional Surface Extends outward and upward at right angles to runway centerline Starts at outside edge of the Primary Surface Slope is 7:1

ADO Transitional Surface Approach Surface Approach Surface Transitional Surface Primary Surface Transitional Surface 7:1 Primary Surface Runway

ADO Primary Surface Transitional Surface Slope 7:1 Transitional Surfaces Horizontal Surface 150 feet

ADO Airport Design Standards Runway Safety Areas (RSA) Runway Safety Areas (RSA)  Rectangular ground surface around runway Runway Object Free Area (ROFA) Runway Object Free Area (ROFA)  Rectangular ground surface around runway and safety area Obstacle Free Zone (OFZ)Obstacle Free Zone (OFZ)  Volume of airspace above runway

ADO Airport Reference Code (ARC) The ARC is a coding system to relate airport design criteria to the operational and physical characteristics of the aircraft intended to use the airport. The ARC is a coding system to relate airport design criteria to the operational and physical characteristics of the aircraft intended to use the airport. A. Aircraft approach category (relates to aircraft approach speed) B. Airplane design group (relates to airplane wingspan)

ADO STRUCTURALPAVEMENT SHOULDER SHOULDER RUNWAY SAFETY AREA RUNWAY OBJECT FREE AREA RUNWAY AREA CROSS SECTION

ADO Runway Safety Area Width and length based on the ARC (both approach and wingspan) Found in Tables 3-1, 3-2, & 3-3 in AC 150/ AC 150/ Width and length vary (based on ARC) from 60 ft either side of centerline and 240 ft beyond runway end to 250 ft either side of centerline to 1000 ft beyond the runway.

ADO Runway Safety Area 9 27 Width varies from 120 ft wide (60 ft either side of Center Line) to 500 ft, depending on aircraft design group. Length = 2 x Width

ADO RSA Object Clearing Criteria Free of objects except those fixed by function:  objects over 3 inches must be frangible at no more than 3 inches  Manholes must be constructed at grade Personnel and Equipment may not be in RSA during aircraft operations

ADO Runway Object Free Area Two dimensional ground area Surrounds runways, taxiways, and taxilanes Clear of Objects except those fixed by function

ADO Runway Object Free Area Width ranges from 250 ft wide (125 ft either side of CL) to 800 ft wide Length ranges from 240 ft long to 1000 ft

ADO ROFA Clearing Criteria Acceptable:  Objects for air navigation  Aircraft ground maneuvering purposes  Taxiing and holding aircraft Not Acceptable :  Objects not essential for air navigation or aircraft maneuvering purposes  Parked aircraft  Agricultural Operations

ADO Comparison of RSA with ROFA ARC C-III, Airplane Design Group III (Wingspan 79 ft to 117 ft) and Approach Category C (121 knots to 140 knots) e.g. B-737 OFA ft wide 1000 ft beyond end of runway RSA ft wide 1000 ft beyond end of runway

ADO Obstacle Free Zone  3 Dimensional Plane - Volume of Airspace  Precludes taxiing and parked planes and object penetration  NAVAIDS fixed by function but frangible  Rnwy OFZ: Inner-approach OFZ: Inner-transitional OFZ

ADO Dimensions of OFZ Extends 200 ft beyond the end of the runway Width varies from 120 ft to 400 ft depending on size of aircraft and approach speed

ADO OFZ Clearing Criteria Not Acceptable:  Taxiing aircraft  Parked aircraft  NavAids that are not frangible

ADO Comparison of RSA, ROFA, OFZ RSAROFA OFZ

ADO Runway Protection Zone W to 1000 W to 1750 L to 2500 W1 W2 200 ft L ROFA

ADO Inner-Transitional OFZ Visual & Runways not lower than 3/4 sm vis 150 ft above airport elev. 50:1 ALS No ALS Rnwy OFZ

ADO Inner-Transitional OFZ Large aircraft and lower than 3/4 mi vis Rnwy OFZ Slope varies: Cat I 6:1 Cat II/III 5:1 then 6:1 H 150 ft

ADO AA B B SECTION A - A SECTION B - B OFZ FOR VISUAL RUNWAYS & RUNWAYS >= 3/4 MILE 150 FEET ABOVE ARPT ELEV

ADO AA B B SECTION A - A SECTION B - B OFZ SERVING SMALL AIRPLANES < 3/4 MILE 150 FEET ABOVE ARPT ELEV 3:1

ADO AA B B SECTION A - A SECTION B - B OFZ SERVING LARGE AIRPLANES < 3/4 MILE 150 FEET ABOVE ARPT ELEV 6:1 H

ADO RUNWAY PROTECTION ZONE CONFIGURATION RUNWAY OBJECT FREE AREA CONTROLLED ACTIVITY AREA

ADO LENGTH W1W1W1W1 W 2 RUNWAY PROTECTION ZONE

ADO RPZ VISUAL & >= 1 MILE CATEGORY C & D W 1 500’, L 1,700’, W 2 1,010’ RPZ < 3/4 MILE ALL AIRCRAFT W1 1,000’, L 2,500’, W2 1,750’ RUNWAY SAFETY AREA RUNWAY OBJECT FREE AREA RPZ, RSA, & ROFA SERVING LARGE AIRCRAFT

ADO Runway 200' PRIMARY SURFACE For Utility Hard Surface Runway 250’ if visual runway 500’ if non- precision instrument runway

ADO Controlling Object Clear 34:1 slope Actual slope of 40:1 Controlling Object that prevents a 50:1 slope

ADO COMMON IMPACTS TO IMAGINARY SURFACES APPROACH SLOPE PRIMARY SURFACE

ADO COMMON IMPACTS TO IMAGINARY SURFACES TRANSITIONAL SLOPE PRIMARY SURFACE 7:1

ADO FILING FAA FORM If first time, register as new user first then log in to file your airspace case proposal -Upload your sketch, in pdf format -Verify your case by mapping -instructions included in the portal site -30 days for FAA to issue determination -Determination good for 18 months -Before case expires, can be extended for another 18 months

ADO Common mistakes -Geographical coordinates are not correct or are not of sufficient accuracy, Lat/Long coordinates need to be to the nearest 0.01 sec -Case filed to late, usually occurs with temporary cranes -Not enough points given for FAA to properly evaluate

ADO Reference Material FAR Part 139 Certification of Land Airports FAA Order , Airport Safety Data Program 14 CFR Part 77, Objects Affecting Navigable Airspace AC 150/ , Airport Design FAA Order , Airport Certification Program Handbook

ADO Reference Material AC 70/7460-2, Proposed Construction or Alteration of Objects that May Affect the Navigable Airspace AC 70/7460-1, Obstruction Marking and Lighting 14 CFR Part 77, Objects Affecting Navigable Airspace