What defines "Extraordinary Circumstances" in the NEPA context?

In the context of the National Environmental Policy Act (NEPA), "Extraordinary Circumstances" refers to situations that may elevate the level of scrutiny for environmental assessments or impact statements. Specifically, this concept encompasses "highly controversial items" or those conditions that are likely to cause significant environmental impacts. Such circumstances often necessitate a more in-depth evaluation of potential environmental consequences, as they indicate that the proposed action may not have predictable outcomes or could lead to significant degradation of environmental quality.

This understanding reinforces the importance of thoroughly assessing the environmental effects of proposed actions, particularly when there is substantial public interest or concern. By identifying and analyzing extraordinary circumstances, agencies can ensure that local communities and stakeholders are adequately informed and considered during the decision-making process. This helps maintain a balance between developmental needs and environmental protection.