The Tenth Circuit reversed a district court finding of a CWA violation in a citizen suit brought against the operator of a gold mine in Colorado. Plaintiffs argued the operator violated the CWA because seepage from the mine's settling ponds flowed into the groundwater and then migrated to the Middle...

The Fifth Circuit vacated a district court ruling in a decades-long dispute over whether a property in Louisiana contains federally regulated wetlands. The property owner sued the Army Corps of Engineers, arguing its determination that the property contained federal regulated wetlands was arbitrary ...

The D.C. Circuit affirmed a district court order remanding to state court a climate liability suit brought against oil and gas companies. The District of Columbia initially sued in state court, arguing the companies deceived consumers about the causal link between fossil fuel usage and climate chang...

A district court granted in part summary judgment for environmental groups in a challenge to a National Park Service (NPS) agreement with Miami-Dade County to facilitate development of a waterpark, hotel, and retail area near the Miami Zoo. The groups argued NPS violated NEPA and the ESA by failing ...

The Ninth Circuit granted in part and denied in part environmental and public interest groups' petition to review EPA's amended pesticide registrations of streptomycin sulfate for use in combating citrus diseases. The groups argued EPA's determination that the registration would not cause "unreasona...

A district court denied Indigenous and environmental groups' motion for injunction pending appeal of their challenge to BLM's approval of an oil and gas development project in the National Petroleum Reserve-Alaska. The groups initially sought to preliminarily enjoin construction through the remainde...

The Ninth Circuit affirmed summary judgment for the Forest Service in a challenge to its approval of a logging project in Inyo National Forest. Environmental groups argued the Service failed to adequately consider alternatives, failed to solicit public comments following its 2018 EA, and failed to s...

The Ninth Circuit reversed summary judgment for FWS in a challenge to its biological opinion (BiOp) concerning water pumping impacts on ESA-protected species in Arizona's San Pedro River Basin. An environmental group argued the BiOp, which concluded that a conservation easement proposed to compensat...