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Case Summary Citation

Seven County Infrastructure Coalition v. Eagle County, 605 U.S. 168 (2025)

Abstract

The National Environmental Policy Act of 1969 is a landmark in United States environmental law. For more than half a century, under its authority, all federal agencies contemplating proposed actions that pose significant environmental impacts have incorporated an analysis of those impacts into their decisions. These analyses provided an avenue for opponents to challenge an agency’s final decision in federal court. Earlier this year, the Supreme Court issued a “course correction” to rein in the disparate approaches that the lower courts had applied to cases challenging federal agency decisions on NEPA grounds. The unambiguous guidance the Court lays out for lower courts to follow when hearing such challenges streamlines the approval process for federal projects while promising to limit the success of challenges to those projects on NEPA-based grounds.

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