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2005-040
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Last modified
3/12/2015 12:10:45 PM
Creation date
4/15/2005 4:55:39 PM
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City Clerk
Doc Type
Resolution
Doc #
2005-040
Date
4/4/2005
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<br />t GENERAL DISCUSSION <br /> <br />This addendum is to expand on the earlier report submitted on November 10, 2004 showing that <br />the Geneva Commons Building project will not adverealy effect the instrument pfOCedurss at SNA. <br />it is to address some concerns that have been expressed about buildings in the location of th$ <br />Geneva Commons project. <br /> <br />Part 11 surfaces are advisory in nature and provide the requirements for submission of NotJcea of <br />Proposed Construction or Alteretion, Form 7460.1. if the object exœeds a height or surface <br />defined in Subpsrt C of FAR Part 77, it would be an obstruction and would of an <br />aeronautical study by the FAA to determine its effect on navigable airspace. Is <br />concluded to have a substantial edverse effect upon the safe and efficient utilization of such <br />airspace, it would be determined to be a ha+ard to air navigation. <br /> <br />for Terminal instrument <br />surfaces are regulatory. <br />adverealy I <br />procedure if such object were a!lowed to be built depending on the amount of penetration and any <br />mitigating factors. <br /> <br />In the preaent cese, thera is neither any impact to any of the Instrument procedures at John Wayne <br />Airport from the Geneva Commons building site nor does the building penetrate any of the <br />regulatory TERPS obstacle clearance surfaces. <br /> <br />In the Obstacle Analysis and Determination of No Hazard1 of the Geneva Commons site, the FAA <br />determined that the building would not constitute a substential adverea effect Upon the safe and <br />efficient utilization of such airspace. Our independent analysis concluded the same. <br /> <br />As pslt of the FAAs aeronautical determination an analysis is mede as to any impsct to Instrument <br />. The for this analysis is that the United Statea Standard <br />rea urfaces is more reatrlctive than Part 77, and TERPS <br />uld <br /> <br /> <br />II, IlS ANALYSIS <br /> <br />There appears to be some concern from the ALCU staff on potential irnpacts of the Geneva <br />building on the ¡LS to Runway 19R at John Wayne Airport. As pointed out in the above discussion, <br />and reedily viewable in diagrams A and 6, the proposed building site is located well outside the ¡LS <br />TERPS surfacas. The proposed Geneva Commons building sits approximately 1300 feat outside <br />the nearest edge of the ILS trapezoid. <br /> <br />Prsclsion (11..8) Final Approach obstruction clearance surfaces are as depicted in Diagram 6. The <br />"Y., "X" and 'W" obstacte clearance surface (OCS) dimensions are as specified in diagram 6. <br />any additional formulae utilized but this page provides the basics, The 'W" OCS is an <br />plane at SNA at iii 1:34 slops beginning 200' from the landing threshold point (I.. TP) and <br />e)(Íeoding along the approach course centerline to the final approach fix. <br /> <br /> <br />The "X" obstecle surfaoe begins at the height of the 'W" surfaca and rieas at a slopa of 1 :4 <br />perp&ndicular to the final approach course. <br /> <br />, 2003 - A1\\I!II>ol~-2~ 912312003 <br />Page 44 of 61 <br /> <br />2 <br />
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