A district court granted in part an environmental group's request to compel EPA to produce guidelines for commercial or industrial solid waste incinerators (CISWI) and other categories of solid waste incinerators (OSWI). The group argued that the Agency failed to comply with nondiscretionary duties ...

The Ninth Circuit affirmed a summary judgment rejecting a mining association's challenge to an Oregon law that prohibits the use of motorized mining equipment in rivers and streams containing essential salmon habitat. The association argued that the law was field preempted by the federal 1872 Mining...

The Ninth Circuit affirmed the dismissal of oil and trucking industry groups' challenge to Oregon's Clean Fuels Program, which regulates production and sale of transportation fuels based on greenhouse gas emissions. The groups argued that the program violated the dormant Commerce Clause by facially ...

The Ninth Circuit denied an environmental group's petition to review EPA's approval of a Montana SIP revision. The group argued that the approval was arbitrary and capricious because Montana's Department of Environmental Quality interpreted one of the SIP's provisions less stringently than the CAA a...

The D.C. Circuit vacated EPA's rule delaying the 2017 Chemical Disaster Rule, which established safety standards for chemical facilities. The Agency argued that it had authority under CAA §112 to delay the effective date of the Rule beyond the ninety-day limit set forth in CAA §307 because ninety ...

The Fourth Circuit vacated both an incidental take statement issued by FWS and a right-of-way permit issued by the National Park Service (NPS) for construction of a natural gas pipeline that intersects the Blue Ridge Parkway. Environmental groups argued that the take limits set by FWS in its Inciden...