In a significant decision, the United States Supreme Court has narrowed the scope of the National Environmental Policy Act (NEPA). This ruling came from the case Seven County Infrastructure Coalition v. Eagle County.
What is NEPA?
NEPA is a law that requires federal agencies to consider the environmental impact of their actions. For any major federal action that significantly affects the environment, an agency must draft an Environmental Impact Statement (EIS). This report ensures that the agency carefully considers the environmental impacts and makes this information available to the public.
The Case

The case involved the U.S. Surface Transportation Board (the Board), which oversees the construction of new railroad lines. The Board approved an 88-mile railroad line in Utah’s Uinta Basin to transport crude oil. However, a Colorado county and several environmental groups challenged this decision. They argued that the EIS did not adequately consider the environmental effects of increased oil drilling in the Uinta Basin or the greenhouse gas emissions from refining the oil.
The Court’s Decision
The U.S. Court of Appeals for the D.C. Circuit initially agreed with the challengers and vacated the EIS and the Board’s approval. However, the Supreme Court overturned this decision. Justice Kavanaugh, writing for the majority, emphasized that NEPA is a procedural statute. This means that as long as an agency prepares an adequate report, courts should defer to the agency’s decisions.
Justice Kavanaugh explained that agencies make many fact-dependent, context-specific, and policy-laden choices when assessing environmental effects. Courts should not micromanage these choices as long as they are reasonable. This effectively narrows the scope of NEPA.
Implications
The Supreme Court’s decision means that agencies do not need to consider the environmental effects of separate projects during the NEPA process. This ruling aims to prevent citizens from using NEPA to delay or block federal projects based on the environmental effects of unrelated projects.
Justice Sotomayor, joined by Justices Kagan and Jackson, agreed with the decision but wrote a separate opinion. They believed the case should have been decided on narrower grounds, focusing on the Board’s lack of authority to reject the project based on third-party actions.
Conclusion
This decision narrows the scope of review required under NEPA. It will be interesting to see how federal agencies conduct their NEPA analysis going forward.


