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23 CHAPTER SEVEN CASE STUDIES The two case studies presented in this section demonstrate that mately 1,400; a 24-hour ban on Stage 2 operations would there is a need for airports to have continued flexibility in reduce this to approximately 130. The Part 161 study was pub- addressing noise outside DNL 65--whether because commu- lished in June 2000 and recommended the total ban on Stage 2 nities have demanded it (Naples Municipal Airport) or because aircraft operations as the most reasonable and cost-effective the airport has conducted proactive planning (Dallas/Ft. Worth measure to minimize incompatible land use. On January 1, International Airport). 2001, the Stage 2 restriction went into effect. NAPLES MUNICIPAL AIRPORT Implementation of DNL 60 Land Use Compatibility Criteria by City of Naples and Collier County The Naples Municipal Airport (APF) is the only airport in the United States with an approved Part 161 study; it has no resi- The city of Naples Comprehensive Plan contained specific dents living within the DNL 65 contour. A key factor in the information regarding rezoning of areas affected or poten- success of the Part 161 study was Naples Airport Authority's tially affected by the airport for the first time in 1984. In 1989, diligence working with local land use planning jurisdictions the city updated the Comprehensive Plan to establish an to implement land use policies that were aimed at residential Airport High Noise Special Overlay District (City Special land uses to DNL 60 dB. District), depicted in the 1989 Comprehensive Plan as the area of land exposed to noise in excess of DNL 65 accord- ing to the five-year forecast case (1991) in the 1987 APF Part 150/161 Background FAR Part 150 Study. Any applicant proposing to develop or significantly redevelop land in the City Special District was-- In 1987, the Naples Airport Authority (NAA) conducted its and is today--required to first obtain a rezoning of the prop- first FAR Part 150 study. As a result, in 1989, an Airport High erty to Planned Development. To obtain the rezoning, the pro- Noise Special Overlay District was established that required posed development or redevelopment must conform to rezoning for any new development or major redevelopment existing zoning standards and must, after specific review for of land within the 65 dB DNL contour. In 1997, the NAA sub- this purpose, be deemed compatible with the airport in terms mitted a revised Part 150, which adopted DNL 60 dB as its of safety and noise. threshold of compatibility for land use planning to preclude the development of incompatible uses in the vicinity of the Airport In 1997, the city revised the map of the City Special District (Figure 12). The FAA approved 14 of 15 measures; perhaps in the Comprehensive Plan to reflect the five-year forecast case most importantly, the FAA approved a ban on nonemergency (2001) 60 contour. In February 2001, the city and the NAA night operations in Stage 1 jet aircraft. In 1998, the NAA sub- executed an interlocal agreement to update the District and mitted a second Part 150 update, which included a single mea- Comprehensive Plan to reflect the 2005 forecast case DNL 60 sure: a 24-hour ban on nonemergency Stage 1 jet operations. contour. In 1999, the FAA approved this measure. The implementation of this measure essentially eliminated any population within In 1986, Collier County developed zoning maps indicat- the DNL 65 dB contour. ing aircraft noise boundaries. In 1987, the Collier County planning department began referencing standards for sound Despite diligent--and successful--NAA efforts to imple- control. In 1991, Collier County approved Ordinance 91-102 ment the approved measures, including the Stage 1 ban, the that redesigned aircraft noise zones using the five-year forecast NAA continued to receive community pressure regarding case (1991) 65 dB DNL contour (County Special District), noise exposure. In August 1999, the NAA initiated a Part 161 added land use restrictions, and implemented notification and study to identify potential operational restrictions that would sound level requirements for buildings and structures. These be appropriate for addressing these community concerns. The requirements are contained in the county's Land Development Part 161 study determined that Stage 2 jets were the principal Code. source of the noise impact that caused community concern. The number of people estimated to live within the 60 dB DNL In June 1999, the NAA requested that the county adopt the contour if there were no restrictions in 2000 was approxi- five-year forecast case (2003) 60 dB DNL contour from the