On April 21, 2020 the U.S. Environmental Protection Agency (“EPA”) and U.S. Army Corps of Engineers (“Corps”) (collectively, the “Agencies”) published the final rule narrowing the meaning of the Clean Water Act (“CWA”) term “waters of the United States,” which represents the culmination of one of President Trump’s key environmental agenda items. The Trump Administration’s repeal and replace approach clears up years of uncertainty in the wake of the Obama Administration’s 2015 rule. The final rule, called the “Navigable Waters Protection Rule,” will become effective on June 22, 2020.