The D.C. Circuit affirmed in part and reversed in part a lower court's dismissal of a conservation group's suit to block the Department of Homeland Security (DHS) from constructing a border wall near the National Butterfly Center in southern Texas.

The Ninth Circuit affirmed, 2-1, a ruling in a lawsuit concerning the Trump Administration's use of military construction funds to build portions of a border wall along the U.S.-Mexico border.

The Ninth Circuit affirmed a lower court ruling in a lawsuit concerning the U.S. government's and California's recovery of cleanup costs from a hazardous waste spill in the Sierra Nevada foothills that released toxic amounts of arsenic into local groundwater.

A district court dismissed for lack of standing a challenge to the Tennessee Valley Authority's (TVA's) rate change for customers in its seven-state service area.

A district court vacated EPA's 2019 determination that found no jurisdictional waters under the CWA at a salt production complex bordering the southwestern San Francisco Bay.

A district court remanded to NMFS for a third time in a decades-long lawsuit concerning the Service's incidental take statement (ITS) assessing the impact of dredge fishing on loggerhead sea turtles in the Atlantic.

A district court granted the Federal Trade Commission's (FTC's) motion to preliminarily enjoin a proposed joint venture between the United States' two largest coal producers.

A district court dismissed a challenge to FWS' designation of critical habitat for the New Mexico meadow jumping mouse.

A district court denied a steel mill owner's motion to preliminarily enjoin construction of a gas pipeline in Texas. The owner argued that the Army Corps of Engineers authorized the construction in violation of the CWA, the ESA, and NEPA.

A district court denied mine owners' motion to dismiss a lawsuit alleging they were in violation of their NPDES permit.