How were population counts determined?
U.S. census data was used to prepare population counts for contours and flight tracks in the Part 150 Study. This data counts individuals and is based on the overall Sound Exposure Levels (SEL), not jurisdictions. Counts for large gathering spaces, such as school or churches, were not included, as this data would inflate and possibly double the number of residents already included in the census population counts. The methodology used was consistent with FAA guidelines.
