463 U.S. 29 (1983) Cited 6,657 times 50 Legal Analyses
Holding that " `settled course of behavior embodies the agency's informed judgment that, by pursuing that course, it will carry out the policies [of applicable statutes or regulations]'"
462 U.S. 87 (1983) Cited 1,152 times 4 Legal Analyses
Holding that "a reviewing court must generally be at its most deferential" when examining an agency decision made "within its area of special expertise, at the frontiers of science"
Rejecting agency finding under APA substantial evidence standard where agency failed to "articulate a satisfactory explanation" and agency "ignore[d] evidence contradicting its position"
Faulting IJ for "fail[ing] to distinguish between material lies, on the one hand, and innocent mistakes, trivial inconsistencies, and harmless exaggerations, on the other hand"
Rejecting claim that agency's analysis was inadequate where agency found “the mitigation measures required by the TCEQ as a condition of approval of the WPAP would adequately address any danger that these activities might pose to groundwater and karst features or to the listed karst invertebrates that rely on them.”
Recognizing "the critical importance of restoring and maintaining environmental quality to the overall welfare and development of man," and declaring the federal government’s responsibility to "preserve important historic, cultural, and natural aspects of our national heritage"