AEST & AEDT (Federal Aviation Administration)

Software tools for hierarchical environmental filtering, prescreening, screening and environmental analysis to determine the potential for environmental impacts

The FAA as part of their regulatory requirement to implement the provisions of the National Environmental Policy Act (NEPA) have relied on Metron Aviation to help develop environmental screening and environmental analysis tools to assess the potential for environmental impacts of proposed FAA air traffic actions. These tools have been developed to be able to assess the potential for environmental impacts in a hierarchical process for a number of FAA typical air traffic actions from individual or groups of instrument approach procedural design changes such as RNAV/RNP and PBN procedure changes to full scale airspace redesign projects intended to optimize the flow of air traffic operations in a particular airspace structure.

Along one half of the screening and analysis spectrum, Metron Aviation has developed the Aviation Environmental Screening Tool (AEST) and assisted in the development of the Aviation Environmental Design Tool (AEDT) as environmental screening and analysis tools that fit into a hierarchy of environmental review steps including environmental filtering, environmental prescreening, environmental screening and lastly environmental analysis.

Metron Aviation has worked with the FAA in helping to develop these environmental filtering, prescreening, screening and analysis tools and processes to apply the appropriate level of environmental review for a given FAA action in determining the appropriateness of a Categorical Exclusion (CATEX), Environmental Assessment (EA) or Environmental Impact Statement (EIS) in documenting environmental analysis compliance. This approach is based on meeting particular exit criteria if applicable at each environmental review step to ensure NEPA compliance and that the review process is robust and provides an appropriate level of process adherence in addition to documentation audit trail artifacts relative to these hierarchical environmental review requirement steps.