Document Type



This Article, the third in a series of five, examines the meaning of “navigable waters” under the Clean Water Act. It traces the traditional judicial interpretation of navigable waters and how Congress and EPA attempted to extend its meaning, then examines how the term has been applied in the context of tributaries and wetlands, isolated waters, groundwater, and EPA’s unitary theory of navigable waters. The author then analyzes EPA and the Corps’ 2014 proposed amendments to the definition of “waters of the United States,” and concludes that those amendments may resolve much of the interpretive crisis.