The D.C. Circuit upheld the dismissal of a CAA citizen suit challenging EPA's failure to take action to prevent the construction of three proposed pollution-emitting facilities in Kentucky. The lower court held that there was no mandatory duty to act and granted EPA's motion to dismiss for lack...

The D.C. Circuit vacated an EPA guidance document addressing obligations of regions still in nonattainment of the 1997 one-hour ozone NAAQS. The guidance binds EPA regional directors and thus qualifies as final agency action. As such, it amounts to a legislative rule issued in violation of the ...

The Ninth Circuit upheld the dismissal of an environmental group's CAA claim challenging an air quality district's method for offsetting emissions increases in its new source review permit program. The district's regulation, contained in the state's EPA-approved SIP, requires that most increase...

A district court held that EPA need not issue endangerment findings under the CAA for marine vessels and nonroad vehicles and engines, but it denied the Agency's motion to dismiss environmental groups' request for an endangerment finding with respect to aircraft engines. EPA argued that the CAA prov...

The Ninth Circuit upheld the denial of animal rights groups' motion to preliminarily enjoin DOI from rounding up, destroying, or auctioning off wild horses and burros in the Twin Peaks Herd Management Area on the California-Nevada border. The groups claimed that the large-scale removal of horses...

A California appellate court reversed a lower court decision certifying residents' class action lawsuit against the state wildlife agency in connection with efforts to eradicate an invasive species of fish, the northern pike, from a lake and its tributaries. The residents argued that the agency's ef...

A district court held that NOAA Fisheries' 2008/2010 biological opinion (BiOp) for the Federal Columbia River Power System is arbitrary and capricious under the ESA. In the BiOp it issued to the U.S. Army Corps of Engineers and the U.S. Bureau of Reclamation, NOAA Fisheries concluded that the op...

A district court upheld the constitutionality of an appropriations rider that reinstated an FWS rule that removed ESA protections for the Northern Rocky Mountain gray wolf in all areas outside of Wyoming. The court previously held that the rule violated the ESA because it protected a listed species ...

A district court denied environmental groups' petition for review challenging BLM's and the U.S. Forest Service's approval of several oil and gas lease sales in the San Juan Basin of northern New Mexico. The groups, who were concerned that the leases would contribute to ozone emissions, impact publi...

The D.C. Circuit held that a single sighting of a protected species is insufficient to render a property "occupied" for purposes of designating critical habitat under the ESA. In 2007, the FWS designated 143 acres of plaintiffs' property as critical habitat for the San Diego fairy shrimp under the E...