A district court denied summary judgment for Native American tribes in a challenge to EPA's approval of Minnesota's 2021 revised water quality standards. The revisions replaced quantitative standards with qualitative narrative standards that describe the characteristics Minnesota waters must have to...

A district court granted summary judgment for a conservation group in a challenge to the Natural Resource Conservation Service's (NRCS') 2020 rule regarding certification of maps delineating wetlands. The group argued NRCS changed its policy regarding pre-1996 wetland certifications without exercisi...

A district court granted in part environmental groups' motion for summary judgment in a challenge to various agency actions relating to EPA's approval of the state of Florida's application to assume permitting authority under §404 of the CWA. The groups argued EPA and FWS violated the ESA because n...

The Tenth Circuit reversed a district court finding of a CWA violation in a citizen suit brought against the operator of a gold mine in Colorado. Plaintiffs argued the operator violated the CWA because seepage from the mine's settling ponds flowed into the groundwater and then migrated to the Middle...

The Fifth Circuit vacated a district court ruling in a decades-long dispute over whether a property in Louisiana contains federally regulated wetlands. The property owner sued the Army Corps of Engineers, arguing its determination that the property contained federal regulated wetlands was arbitrary ...

The Ninth Circuit affirmed summary judgment for an environmental group in a suit against a California resident who engaged in instream suction dredge mining in Idaho’s South Fork Clearwater River without an NPDES permit. The group argued the resident violated the CWA each time he operated a suctio...

A district court denied the city of New Orleans' motion to remand to state court its lawsuit against oil companies for allegedly damaging coastal wetlands with their operations. The city initially sued the companies in state court, arguing they violated the Louisiana State and Local Coastal Resource...

A district court granted DOI's motion to dismiss a lawsuit concerning tribal water rights on the Crow Reservation in Montana. Tribal members who hold property on the reservation challenged the 2010 Crow Tribe Water Rights Settlement Act (Settlement Act), which provided benefits to the tribe in excha...

The Fifth Circuit reversed a district court ruling upholding the Army Corps of Engineers' decision to issue a CWA §404 permit to fill wetlands for a commercial and residential development project in St. Tammany Parish, Louisiana. Parish residents and environmental groups argued the Corps' decision ...

A district court granted in part and denied in part summary judgment for environmental groups in a CWA/SMCRA citizen suit concerning the discharge of pollutants from surface coal mines in West Virginia. The groups argued a coal mining company violated the CWA by discharging mining pollutants at Rush...