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Part 77 Obstruction Surfaces <br /> �• ■ Horizontal Surface:183'AMSL <br /> • � <br /> �• � y o\ ■ Conical Surface:l83'-383'AMSL <br /> ♦ j <br /> ♦�A �? o <br /> o S TH INF L <br /> �So ti <br /> X40 <br /> c � <br /> Q <br /> 0 <br /> 'moo0 ti <br /> 700 <br /> ' 90 80 70 60 <br /> 50 <br /> Figure 4 - Overview of Obstruction Criteria for South Infill <br /> Conclusion:At the study location, the proposed 190'AMSL Northeast Infill will not penetrate <br /> SCK obstruction criteria and the proposed 180.7'AMSL South Infill will not penetrate SCK <br /> ' obstruction criteria. <br /> Terminal Instrument Procedures (TERPS) <br /> An analysis of the Terminal Instrument Procedures(TERPS) criteria was completed to determine <br /> the maximum elevation to which a structure could be erected without impacting SCK instrument <br /> ' approach and departure procedures. <br /> Instrument Approach Procedures <br /> A penetration to the Obstacle Clearance Surfaces (OCS) by a proposed structure would result in <br /> the need to increase the procedure's Minimum Descent Altitude (MDA) (the lowest altitude that <br /> a pilot can descend on an approach) and would likely receive a Hazard Determination from the <br /> FAA. <br /> SCK Instrument Arrival Procedures <br /> A review of SCK's Instrument Approach Procedures (IAP) revealed that approaches for aircraft <br /> landing on Runway 29R has the lowest Obstacle Clearance Surfaces (OCS) over the proposed <br /> location. <br /> Figures 5 through 10 display an overview of the OCS associated with IAP's to Runway 29R. <br /> ' S <br /> ZViCCiamsAviation Consultants,Inc. <br /> 1 <br />