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APPENDIX II: PRELIMINARY AIRPORT ASSESSMENT <br />APPENDIX <br />The NPIAS airport service level categories are as follows: <br />scheduled air carrier service for at least 10,000 enplaned passengers per year. <br />scheduled air carrier service for 2,500 to 9,999 enplaned passengers per year. <br />scheduled air carrier service or scheduled air carrier service for less than 2,500 <br />enplaned passengers per year. <br />designated Primary Service Airports by redirecting general aviation aircraft <br />operations from the Primary Service Airports. <br />While 75o/o of major airline flights operate out of less than 65 major metropolitan airports <br />and 99.83% of total commercial service passenger enplanements occur at 380 airports <br />(out of 506 US airports certified for scheduled airline service) - these airports are also <br />used by General Aviation. ln contrast, there are 19,627 public and private use landing <br />facilities in the US that are used by General Aviation of which about 5,080 airports are <br />available for public use. Of the 5,080 public-use airports2o, the FAA's most recent NPIAS <br />identifies 3,310 existing airports (and 6 additional proposed airports) that are important to <br />national air transportation and therefore eligible to receive grants under the FAA Airport <br />lmprovement Program (AlP). <br />Figurel0: N PIAS Overview <br />3,304 Existing <br />3,244 Public Owned <br />60 Private Owned <br />6 Proposed <br />3,310 <br />NPIAS Airports <br />396 Primary <br />Commercial Service 250 GA Relievers <br />123 Nonprimary CS <br />5 Nonprimary <br />3 General Aviation <br />2 Commercial Service <br />5 General Aviatio l Primary <br />20 The word "airport" includes landing areas developed for conventional fixed-wing aircraft, helicopters, <br />and seaplanes. CS = Commercial Service GA = General Aviation <br />Airport Strategic Business Plan, 0712612021 47