040405 Jt PH Cond Use, Develpo Agmt, Zoning, etc.-Geneva Commons Proj 200 E. First American Way

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The RNAV procedure to R1 9R could be impacted if the buildings exceed 310' feet MSL. The proposed buildings are located in the primary area of the RNAV, however the current FAA published minimums are adequate and will not require any changes. One consideration that must be addressed is FAR Part 77.15. Part 77.15 does not require a person to notify the Administrator for the construction of any antenna structure of 20 feet or less in height except one that would increase the height of another antenna structure. A 20 foot addition to the building elevation would make the total elevation of the building 287'+20'= 307'. Therefore, the building's maximum elevation including any 20 foot antenna will not exceed 310' feet MSL. The 310' elevation is the maximum altitude permitted in this area by the RNAV approach without requiring a change to the procedures minimum altitudes. The runway 01 L Localizer Back course missed approach procedure will not be impacted by the Geneva Commons Building. The current missed approach calls for a "Climb to 800, then climbing left turn to 2300 via SLI R -120 to SLI VORTAC." The missed approach location is 0.7 nautical miles south of the R01 L threshold at an altitude of 480' MSL. Even a minimally performing aircraft climbing at the minimum rate of 200' per nautical mile will commence their turns within two miles from the missed approach point, more than a mile prior to the Geneva Commons Site. Even if the missed approach aircraft failed to turn but proceeded straight ahead the aircraft would be above 1000' MSL by the time they were abeam Geneva Commons. 2.3.1 Circling Procedures Circling approaches were evaluated for the established Instrument Approach Procedures at SNA. The lowest circling minimums were found on the RNAV (GPS) R19R and RNAV (GPS) R1 L approaches. The minimum descent altitude for the approaches was 640 feet MSL with 1 statute mile visibility for Aircraft categories A & B; 1 '/2 miles for Category C; and 2 miles for Category D aircraft. The FAA used the highest obstacle in the protected circling area to determine the proper minimums. In this case, the 321 foot Center Tower is the controlling obstacle that was used by the FAA, (Source: FAA Form 8260.9 on file at Sacramento Flight Inspection Office). The tower is located 6000 feet North /Northwest of R1 9L. The minimum required obstacle clearance for a circling procedure is 300 feet. In this case the building height of 321 feet MSL plus 300 feet = 621. This figure is then rounded up to the nearest 20' increment therefore providing the 640' MSL circling MDA. A taller structure, 323 feet MSL, is located at South Coast Plaza, (Source; 2002 Obstruction Chart). However, the minimum altitude for circling remains at 640'MSL due to the aforementioned rounding. The proposed Geneva structure at an elevation of 287' feet MSL and 6876' (1.3 SM) feet from RI 9L will not impact the circling procedure. The Center Tower at 321' MSL as well as the South Coast Plaza at 323'MSL are higher and control the MDA for the lowest circling minimums at SNA. 7