On November 22, 2019, the Army Corps of Engineers (Corps) agreed to obtain a National Pollutant Discharge Elimination System (NPDES) permit for the operation of the federally owned and operated Chief Joseph Dam, the second-largest hydropower producing dam in the United States, as part of a settlement with the Columbia Riverkeeper. The settlement resolves litigation (previously addressed on this blog) brought by the Columbia Riverkeeper, which claimed that the Corps’ dam operations had long been discharging oil, grease, and heated water into the Columbia River without a permit.

Sections 301(a) and 402 of the Clean Water Act (CWA) prohibit anyone, including a federal agency, from discharging “pollutants” through a “point source” into a “water of the United States” except as authorized by a NPDES permit. Section 505 of the CWA provides any citizen, including a citizen group like Columbia Riverkeeper, the ability to bring a civil action against any person, including the United States, that is violating an effluent standard or limitation. As detailed by its complaint, the Columbia Riverkeeper alleged that the Corps has been in violation of CWA standards by allowing oils and grease to accumulate in sumps that drain into the river and utilizing hydro-carbon based lubricants on generation equipment that become discharged with cooling water without a NPDES permit.
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