Pennsylvania's highest court held that the $10,000/day civil penalty under the Clean Streams Law does not apply to each day that pollutants leaked from an impoundment remain in the groundwater and then leach into other waters of the Commonwealth. The case arose after the state environmental agency a...

A district court held it could not rule on the merits as to whether EPA violated the APA when it approved Ohio's 2016 impaired water list, but nevertheless remanded the case to EPA so it could approve or disapprove Ohio's incomplete CWA §303 list. Under the CWA, states must submit to EPA a list of ...

The Ninth Circuit upheld the U.S. Army Corps of Engineers' issuance of a CWA §404 permit authorizing the discharge of materials into the Santa Clara River as part of a large-scale residential, commercial, and industrial development project in Los Angeles County. The proposed project would encompass...

The Fifth Circuit affirmed a lower court decision dismissing an environmental restoration company's lawsuit against the U.S. Army Corps of Engineers for building new wetlands without considering whether it should buy mitigation credits from the company. The company, which invests in projects that re...

The Fifth Circuit stayed a preliminary injunction that barred a company from constructing a crude oil pipeline through the environmentally sensitive Atchafalaya Basin. An environmental group claimed that the U.S. Army Corps of Engineers unlawfully issued a permit allowing the construction, and a low...

In a 259-page opinion, a federal claims court held that the U.S. Army Corps of Engineers is responsible for causing recurrent flooding along the Missouri River. Farmers, landowners, and business owners filed takings claims against the government, arguing that the Corps' management of the Missouri Ri...

The U.S. Supreme Court held that the United States may pursue claims against New Mexico for violating the Rio Grande Compact, which Colorado, New Mexico, and Texas entered into in the 1930s to resolve disputes over water rights. Texas filed suit alleging that New Mexico was allowing its residents to...

A district court upheld the U.S. Department of Homeland Security's (DHS') decision to waive the legal requirements of NEPA, ESA, and CZMA for two border wall construction projects in San Diego, California. DHS made its waiver determination under §102 of the Illegal Immigration Reform and Immigrant ...

The U.S. Supreme Court, in an unsigned judgment and decree, ordered Wyoming to pay Montana $20,340 in damages, plus $67,270.87 in costs, for reducing the amount of water available in the Tongue River in violation of the Yellowstone River Compact. The Compact protects pre-1950 appropriative rights to...

The Arizona Court of Appeals held that a tribe may proceed with its nuisance claim against a ski resort for its use of reclaimed wastewater to make artificial snow. In 2002, the ski resort contracted to purchase reclaimed wastewater for the purpose of making artificial snow. In 2005, the Forest Serv...