The Fourth Circuit, 2-1, vacated a district court ruling in a lawsuit concerning the Army Corps of Engineers' plan for maintaining a dam on the Savannah River. The state of South Carolina argued the Corps' plan violated the Water Infrastructure Improvements for the Nation (WIIN) Act because it would...

A district court granted 24 states' motion 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. The states argued the rule violated the APA, the Commerce Clause, the Tenth Amendment, the Due Process Clause, a...