A district court denied a motion for preliminary relief in a challenge to the Navigable Waters Protection Rule, which substantially narrows the definition of "waters of the United States…

The Sixth Circuit reversed, 2-1, a district court ruling that required the Pipeline and Hazardous Materials Safety Administration (PHMSA) to comply with the ESA and NEPA before approving an oil…

A district court denied EPA's motion to dismiss a lawsuit concerning its duty to update its National Contingency Plan (NCP) for addressing oil and hazardous substance contamination.…

The U.S. Supreme Court held, 6-3, that the "functional equivalent of a direct discharge" of pollutants requires a CWA permit, and remanded for consideration of whether a discharge of…

A district court dismissed a challenge to EPA's decision to withdraw proposed restrictions pursuant to CWA §404(c) for the proposed Pebble Mine in Southwest Alaska. Nonprofit groups argued…

A district court dismissed a challenge to a pipeline company's failure to seek a CWA permit for construction of a natural gas pipeline in Pennsylvania. A conservation group argued the company…

A district court upheld a CWA §404 permit the U.S. Army Corps of Engineers granted to authorize the Maryland Transit Administration (MTA) to discharge dredge-and-fill materials into nearby waters…

A district court denied summary judgment to an environmental group challenging the U.S. Army Corp of Engineers' issuance of a CWA §404 permit for development of an additional portion of an…

The Seventh Circuit affirmed dismissal of a challenge to the Michigan Department of Environmental Quality's approval of a CWA §404 permit for a proposed mine along the Menominee River. A…

The Ninth Circuit affirmed judgment for environmental groups in a CWA challenge to compel EPA to develop and issue long-overdue temperature TMDLs for the Columbia and Snake Rivers. The groups…