528 U.S. 167 (2000) Cited 7,153 times 25 Legal Analyses
Holding that plaintiffs who curtailed their recreational activities on a river due to reasonable concerns about the effect of pollutant discharges into that river had standing
463 U.S. 29 (1983) Cited 6,634 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]'"
529 U.S. 576 (2000) Cited 1,893 times 18 Legal Analyses
Holding that agency interpretations contained in "policy statements, agency manuals, and enforcement guidelines, all of which lack the force of law do not warrant Chevron-style deference"
Holding that conflicting evidence on the effects of ecological intervention in post-fire landscapes made a proposed project highly uncertain, thus requiring an EIS
Holding an agency's exclusion of three documents that the plaintiffs had identified through a FOIA request is "not strong evidence of bad faith or an incomplete record"
Finding interstate widening project was not improperly segmented from interchange improvements because improvements served legitimate purposes “in the absence of the I–270 expansion, and thus are sufficiently independent. They are expected to result in less congestion at interchanges, facilitate local traffic, and provide access to mass transit.”
Finding the FAA's cumulative impacts analysis of noise to be inadequate where the agency “had not evaluated existing noise impacts [or] those planned impacts that will exist by the time the new facility is constructed and in operation”
Finding the economies of "[m]any coastal areas . . . have been badly damaged by the overfishing of fishery resources," particularly by "[t]he activities of massive foreign fishing fleets"
Requiring the councils to conduct public hearings "to allow all interested persons an opportunity to be heard in the development of fishery management plans"
Allowing fee "to recover the actual costs directly related to the management, data collection, and enforcement of any limited access privilege program," without limiting fee to payment for observers