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.

A district court struck down BLM's 2016 rule promulgating new regulations to reduce natural gas waste during oil and gas production activities on federal land and Indian leases. States argued that the rule exceeded BLM's statutory authority and was otherwise arbitrary and capricious.

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.