Yesterday, the U.S. Environmental Protection Agency and the U.S. Army Corps of Engineers proposed a rule to rescind the 2015 Clean Water Rule and recodify the definition of “waters of the United States,” known as WOTUS, that existed before 2015. EPA and the Corps intend to re-evaluate and revise the WOTUS definition consistent with the Executive Order issued on February 28, 2017. In the meantime, EPA states that the proposed rule will be implemented consistent with “Supreme Court decisions, agency guidance, and longstanding practice.”