Part 150 Study Draft Working Paper One July 1998 0001

The Seattle-Tacoma International Airport (Sea-Tac) FAR (Federal Aviation Regulation) Part 150 Study is an update of an existing program adopted by the Port of Seattle in 1994. That Study recommended specific noise abatement and mitigation measures, and resulted in the continuation of several measures developed through a mediation agreement, to reduce noise impacts along with the intrcxiuction of new measures. AnFAR Part 150 Study is a voluntary aircraft noise and land use compatibility study that an airport Sponsor undertakes in an effort to reduce the number of people affected by noise. The purpose of an FAR Part 150 Program is very simple: to assess the noise environment, to prepare forecasts of aviation operations, to identify land uses within the airport environs and to explore ways to mitigate land use compatibility conflicts. In other words, to reduce the number of people affected by noise, consistent with airport operatlons. e FAR Pan 150 requires the development of Noise Exposure Maps that depict the existing aircraft noise levels, expressed in terms of the Day-Night Noise Level (DNL) metric, and the five year future noise levels in terms of DNL. Thus the Study has a five year planning horizon. The threshold DNL used for compatibility purposes is the 65 DNL noise contour. In addition to the Noise Exposure Maps, a Noise Compatibility Program (NCP) is also required. The NCP contains the recommendations for noise mitigation and abatement that the Sponsor is recommending for implementation. A schedule for implementation, along with the parties responsible for…

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Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]