A district court stayed the Navigable Waters Protection Rule, which substantially narrows the definition of "waters of the United States" that are subject to federal regulation under the CWA, in Colorado. Colorado argued that the Supreme Court's ruling in Rapanos v. United States foreclosed the appr...

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" that are subject to federal regulation under the CWA. California argued that EPA and the Army Corps of Engineers...

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 pipeline operator's response plans for addressing the risk of a potential oil spill. A conservation group ...

A district court remanded back to state court Massachusetts' consumer protection lawsuit concerning an oil company's accounting of climate change risks. The state argued that the company misled and deceived its investors and consumers about the climate risks of fossil fuel products, and moved to rem...

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. Environmental groups argued that the current NCP is dangerous because it continues to permit the use of chemical dispe...

The Ninth Circuit affirmed in part a district court ruling granting California counties' and cities' motions to remand to state court a lawsuit against oil companies alleging nuisance and other causes of action arising from the role of fossil fuel products in global warming. The companies argued the...