What is the lowest level of NEPA analysis?

Introduction: The National Environmental Policy Act (NEPA) mandates a specific level of analysis for various environmental projects, including those categorized as CATEXs. CATEX, an acronym for various designations such as CX, CatEx, or CatX, falls under a specific tier of NEPA analysis.

NEPA Analysis Tiers: NEPA outlines multiple tiers of analysis, with each tier determining the depth and scope of environmental review required. The lowest tier of analysis applies specifically to CATEXs, which necessitates a unique approach.

CATEX Definition: CATEX stands for various designations related to categorical exclusions, which are types of projects that typically have minimal environmental impacts and are therefore exempt from more extensive environmental reviews.

"Extraordinary Circumstances": A key aspect of CATEX analysis involves identifying "extraordinary circumstances" that may render a project ineligible for categorical exclusion status. These circumstances essentially mean that the project, though initially classified as a CATEX, requires further analysis due to unforeseen environmental impacts.

Necessity of "Extraordinary Circumstances" Provision: The "extraordinary circumstances" provision in CATEX analysis ensures that environmental concerns are not overlooked, even for projects initially deemed low-impact. It serves as a safeguard against potential negative environmental impacts that may arise unexpectedly.