In an unpublished opinion, the Ninth Circuit reversed the denial of an environmental group's motion to intervene in a lawsuit challenging EPA and the U.S. Army Corps of Engineers' 2015…

A district court held that a Native American tribe may file its own complaint as an intervenor in another tribe's challenge to U.S. Army Corps of Engineers permits for the Dakota Access…

A district court denied industry groups' motion to intervene in a CAA citizen suit concerning EPA's alleged failure to review the ozone NAAQS in a timely manner. The underlying lawsuit…

A district court granted environmental groups' motion to intervene in a landowner's lawsuit challenging FWS' critical habitat designation for the dusky gopher frog in portions of…

The D.C. Circuit held that a power company may not appeal a lower court decision that USDA's Rural Utilities Service violated NEPA before granting approvals and financial assistance to the…

The Federal Circuit affirmed a lower court decision denying an environmental group's motion to intervene in a takings suit filed by property owners claiming that the government's…

A district court denied environmental groups' motion to intervene in a proposed consent decree resolving the District of Columbia's lawsuit against a power company alleging PCB…

A district court held that environmental groups and water associations may intervene in a lawsuit challenging EPA's TMDL for the Chesapeake Bay and its tributaries. The plaintiffs in the…

The Ninth Circuit held that environmental groups may intervene in a citizen suit against the U.S. Forest Service concerning restricted motorized and mechanized vehicle use in a section of the…

A district court held that a property owner that filed a RCRA, CAA, and CWA citizen suit against a mine may not intervene in the United States' and Missouri's enforcement action against…