The U.S. Supreme Court held, 5-4, that an 1868 peace treaty between the Navajo Nation and the United States establishing the Navajo Reservation reserved necessary water to accomplish the purpose of the reservation, but did not require the U.S. government to take affirmative steps to secure water for...

A district court vacated BLM's final EIS and 2019 record of decision (ROD) that approved an open-pit phosphate mine in southeast Idaho. Environmental groups had argued the ROD and final EIS upon which it was based violated NEPA, FLPMA, and the CWA. The court granted summary judgment in part for the ...

The Ninth Circuit, 2-1, denied a municipal irrigation district's request to compel a district court to remand to state court its motion for preliminary injunction in a suit concerning water allocation in the Klamath Basin. The district initially sought to stop the Bureau of Reclamation from releasin...

A district court granted in part and denied in part an environmental group's motion for summary judgment in a CWA citizen suit concerning the Forest Service's discharge of aerially deployed fire retardant into navigable waters of the United States without an NPDES permit. The group argued the Servic...

The D.C. Circuit granted in part environmental groups' petitions to review FERC orders allowing the Mountain Valley Pipeline project to proceed. The groups argued FERC erred by allowing construction to resume before the pipeline owner reacquired all its other permits, that constructing segments of t...

The U.S. Supreme Court held that the CWA extends to only those "wetlands with a continuous surface connection to bodies that are 'waters of the United States' in their own right," such that they are indistinguishable from those waters, in a challenge to an EPA compliance order stating that landowner...

The Ninth Circuit vacated two district court rulings in challenges to the Forest Service's approval of a logging project in the Idaho Panhandle National Forest. An environmental group sued the Forest Service in two separate suits, arguing it violated the Healthy Forest Restoration Act (HFRA) and NEP...

The D.C. Circuit dismissed in part and denied in part environmental groups' petition to review FERC's approval of a liquefied natural gas project in Alaska. The groups argued the approval violated NEPA and the Natural Gas Act. The court found that FERC considered and reasonably rejected no-action al...

In an unpublished opinion, the Ninth Circuit reversed summary judgment for the Forest Service in a challenge to its authorization of cattle grazing on allotments in Tonto National Forest. A group representing property owners in the area challenged the authorization on NEPA and National Forest Manage...

The Sixth Circuit granted the Commonwealth of Kentucky's and business groups' motions to preliminarily enjoin EPA's and the Army Corps of Engineers' 2023 rule revising the definition of "waters of the United States" under the CWA. A district court had denied the motions, concluding plaintiffs lacked...