449 F.2d 1109 (D.C. Cir. 1971)
Calvert Cliffs is the seminal early case interpreting the National Environmental Policy Act of 1969 (NEPA). Decided by the D.C.
Do the AEC's NEPA-implementing regulations, which postpone and minimize environmental consideration and rely on adversarial presentation and other agencies' approvals, comply with NEPA's requirements that federal agencies integrate environmental factors into decision-making to the fullest extent possible, including through timely and substantive use of environmental impact statements and consideration of alternatives?
NEPA imposes binding, judicially enforceable obligations on all federal agencies to: (1) consider environmental amenities and values alongside economic and technical factors to the fullest extent possible; (2) prepare a detailed environmental impact statement for every major federal action significantly affecting the human environment, addressing environmental impacts, unavoidable adverse effects, alternatives (including those outside the agency's jurisdiction insofar as they inform the decision), and irreversible resource commitments; (3) integrate environmental review at the earliest practicable stage, before irretrievable commitments are made; and (4) ensure that the responsible decision-maker actually considers the EIS and takes a hard, reasoned look at environmental consequences in reaching a fully informed and well-considered decision. Agencies may not avoid NEPA compliance by deferring to other agencies, relegating environmental issues to adversarial parties, or postponing review to later stages where options have been foreclosed.
The D.C. Circuit invalidated substantial portions of the AEC's regulations as inconsistent with NEPA and remanded for revision. The court held that NEPA requires the AEC to consider environmental factors and the EIS at each relevant stage of licensing, including the construction permit stage; to ensure independent, substantive consideration of environmental issues by the agency regardless of whether parties raise them; to evaluate all significant environmental effects even if other agencies also regulate those aspects; and to weigh alternatives meaningfully. The AEC cannot treat the EIS as mere background information or defer environmental review until after major commitments are made.
Calvert Cliffs is the foundational case that operationalized NEPA's action-forcing mechanisms. It establishes that environmental review must occur early, be substantive, and be conducted by the decision-making agency itself. The case anchors the doctrine that courts will require a fully informed and well-considered decision that meaningfully weighs environmental consequences and alternatives. For law students, it illustrates statutory interpretation of open-textured mandates (to the fullest extent possible), the interplay between NEPA and agency-specific statutes, and the contours of judicial review ensuring agency compliance without dictating outcomes. It also sets the stage for later cases like Vermont Yankee, which limited judicially imposed procedures but left intact NEPA's core obligations as enforced in Calvert Cliffs.