The Tenth Circuit dismissed an environmental group's citizen suit against an Oklahoma power company for CAA violations at a power plant. The group claimed the company modified a coal-fired boiler without first obtaining an emission-regulating permit as required by the CAA.

The D.C. Circuit upheld the dismissal of a community group's lawsuit challenging the construction of a streetcar storage and training facility and the installation of overhead wires along a 2.2-mile stretch of a new streetcar line in Washington, D.C.

The D.C. Circuit upheld the U.S. Forest Service's decision to exclude approximately 8,300 acres of federal land that fall within recreational ski boundaries from the Colorado roadless rule.

The Ninth Circuit dismissed an environmental group's appeal of a preliminary injunction that barred it from interfering with oil exploration activities in the Chukchi Sea. The group challenged the injunction on several jurisdictional bases, as well as on the merits.