On April 15, 2019, the environmental group Columbia Riverkeeper (Riverkeeper) filed suit against the U.S. Army Corps of Engineers (Corps) in the U.S. District Court for the Eastern District of Washington, alleging that the Corps’ operation of the Chief Joseph Dam is in violation of the Clean Water Act (CWA). Riverkeeper’s complaint raises important questions as to whether certain discharges from hydropower facilities trigger the need for an authorization under the National Pollutant Discharge Elimination System (NPDES) pursuant to section 402 of the CWA, 33 U.S.C. § 1342.
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On April 15, 2019, EPA issued its long-awaited Interpretative Statement addressing the Clean Water Act’s applicability to releases of pollutants from point sources into groundwater that subsequently migrate to jurisdictional surface waters. The question this interpretation addresses stems from the 2018 federal circuit split previously discussed here. On February 19, 2019, the Supreme Court granted certiorari in one of the cases that contributed to the split, County of Maui v. Hawai’i Wildlife Fund. The United States filed its amicus brief in that case, urging the highest court to review County of Maui, but not a similar ruling from the Fourth Circuit. As the question was being reviewed by the federal courts, EPA requested public comment on this issue and received over 50,000 comments. EPA is addressing some of these comments in the Interpretative Statement.
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On Friday, October 7, 2016, several industry trade organizations and associations, as respondents, filed a brief requesting that the U.S. Supreme Court review the fractured decision of the Sixth Circuit to exercise jurisdiction over various challenges to the EPA-Army Corps issued Waters of the United States (”WOTUS”) Rule under the Clean Water Act (“CWA”).

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