A district court denied a commercial fisherman's motion to preliminarily enjoin the Army Corps of Engineers and EPA from enforcing a 2023 rule that revised the definition of "waters of the United States." The fisherman argued the agencies did not faithfully implement the Sackett v. Environmental Pro...

The Sixth Circuit reversed a district court ruling in a lawsuit concerning the Line 5 Pipeline that runs underwater across the Straits of Mackinac between Michigan’s Lower and Upper Peninsulas. Michigan's attorney general (AG) initially sued the pipeline owner in state court, seeking to enjoin con...

The D.C. Circuit, 2-1, affirmed summary judgment for BLM in a challenge to the agency's 2003 final rule withdrawing a proposed rule that would have limited the maximum size of "mill sites" for mining claims on federal lands and instead codifying the agency's historical understanding that the governi...

The D.C. Circuit denied petitions to review FERC's approval of a project that would expand service on a natural gas pipeline running from western Pennsylvania to the New York metropolitan area. A nonprofit group argued FERC's EIS failed to quantify greenhouse gas (GHG) emissions from upstream drilli...

The U.S. Supreme Court, 5-4, denied two states' motion to enter into a consent decree in a lawsuit concerning a 1938 interstate agreement that apportions the waters of the Rio Grande River among Colorado, New Mexico, and Texas. Texas initially sued Colorado and New Mexico, arguing excessive groundwa...