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…

A district court denied motions to remand and vacate EPA's decision to allow a no-discharge zone in Puget Sound. A tugboat, towboat, and barge industry group argued that EPA erred in…

A state appellate court reversed the Minnesota Pollution Control Agency's decision to reissue a NPDES permit for an iron ore mine in northeast Minnesota. An environmental group and Indian…

A district court denied summary judgment in a challenge to EPA's approval of Maryland's 2018 water quality report, which reclassified 139 impairment listings based on TMDLs set by the…

A district court upheld EPA's interpretation that the CWA does not regulate discharges into groundwater that is hydrologically connected to navigable waters in a lawsuit concerning a…

A district court held that environmental groups lacked standing in their challenge to EPA's exclusion of certain waste treatment systems from the definition of navigable waters under the CWA…