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National Parks Conservation Ass'n v. Tennessee Valley Auth.

A district court held that environmental groups' citizen suit against the Tennessee Valley Authority (TVA) for violating the Clean Air Act, the Tennessee state implementation plan, and related regulations in conjunction with its operation of coal-fired power plant in Bull Run, Tennessee, must procee...

National Parks Conservation Ass'n, Inc. v. Tennessee Valley Auth.

A district court entered judgment for the Tennessee Valley Authority (TVA) with respect to environmental groups’ claims that the TVA violated the CAA and the Tennessee SIP in its operation of a fossil fuel-fired electricity generating facility. The groups argued that two projects, the economiz...

Great Basin Mine Watch v. EPA

The Ninth Circuit held that the U.S. Environmental Protection Agency (EPA) did not act arbitrarily, capriciously, or contrary to law when it granted Nevada's request to split one of its clean air areas into two. Contrary to an environmental group's claim, the presence and operation of a mine in the ...

New York v. EPA

The court remanded portions of a 2002 U.S. Environmental Protection Agency (EPA) rule interpreting when a major stationary source undertakes a "modification," thereby triggering the Clean Air Act's new source review (NSR) requirements. EPA erred in promulgating the clean unit applicability test, whi...

Sierra Club v. Tennessee Valley Auth.

The court affirms a district court's grant of summary judgment to the Tennessee Valley Authority (TVA) on environmental groups' request for civil penalties and on its claim as to violations of the Clean Air Act's (CAA's) 20% opacity limitation occurring before May 20, 1999, but it reversed summary j...

Knox v. Department of Labor

The court reverses the dismissal of an individual's complaint against his employer under the Clean Air Act's (CAA's) whistleblower provision. The U.S. Department of Labor's Administrative Review Board (ARB) dismissed the complaint reasoning that the individual did not engage in a protected activity ...

Environmental Defense v. Duke Energy Corp.

The Court reversed the Fourth Circuit's grant of summary judgment in favor of a coal-fired power plant operator charged with violating the Clean Air Act's (CAA's) prevention of significant deterioration (PSD) regulations. The CAA's PSD and new source performance standards (NSPS) provisions both cove...

Engine Mfrs. Ass'n v. South Coast Air Quality Maintenance Dist.

The Ninth Circuit affirmed a lower court decision that the Clean Air Act (CAA) does not preempt certain provisions of local "fleet rules" requiring operators to meet specified emission standards or engine requirements, but reversed and remanded the court's refusal to consider whether the CAA preempt...

Pacific Merchant Shipping Ass'n v. Goldstene

The Ninth Circuit upheld an injunction enjoining the California Air Resources Board from enforcing state regulations that limit emissions from the auxiliary diesel engines of ocean-going vessels within 24 miles of California's coast. Clean Air Act (CAA) §209(e)(2)(A) requires California to obta...

United States v. Alabama Power Co.

A district court held that the applicable legal test for the "routine maintenance, repair, and replacement" exclusions found in the Clean Air Act (CAA) should be applied to activities that are considered "routine in the industry" rather than "routine at the unit." In a CAA enforcement action filed a...