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OSS Map displays the Future (2011) noise contours as instructed by Phil Gwiner, planning and noise specialist at columbus airports. These contours more accurately reflect current conditions at the airport.Rickenbacker Noise Study: http://columbusairports.com/files/noise-program/rickenbacker/appendixg-1-42.pdf Bolton Field Airport noise study completed in 2002, with contours representing future 2006 noise conditions. 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