The Ninth Circuit, in an amended opinion, denied an environmental group's petition challenging EPA's decision to grant two air permits authorizing exploratory drilling operations in the Arctic Ocean by a drillship and its associated fleet of support vessels. The permits require the drillship to comp...

The Federal Circuit reversed the dismissal of landowners "rails to trails" takings claims against the government. The landowners alleged that the government's issuance of a Notice of Interim Trail Use or Abandonment (NITU) in 2006 constituted a compensable Fifth Amendment taking because it operated ...

A district court dismissed as untimely Alaska's lawsuit challenging the 2001 roadless rule, which prohibits roadwork and timber harvesting on 58.5 million acres of national forest, including 14.7 million acres of the Tongass and Chugach National Forests in Alaska. Alaska's cause of action accrued in...

A district court held that EPA has no mandatory or nondiscretionary duty to make a determination as to whether lead emissions from general aviation aircraft engines using aviation gasoline endanger the public health or welfare under CAA §231(a)(2)(A). A finding that emissions cause or contribute to...

The Sixth Circuit held that the CAA does not categorically prevent EPA from challenging preconstruction projections of whether and to what extent emissions will increase following construction. The preconstruction projection determines whether the project constitutes a “major modification” and t...

The Eleventh Circuit vacated EPA's 2011 disapproval of Alabama SIP provisions on opacity, thereby reinstating EPA's 2008 approval of opacity limits. EPA's 2011 disapproval was unauthorized by the CAA because EPA failed to make the statutorily required error determination. Neither the text of the fin...