President Trump will sign an executive order Tuesday scrapping a controversial Environmental Protection Agency rule that expanded the agency’s jurisdiction over the nation’s waterways during the second term of former President Obama.

The regulation, known as the Waters of the U.S. rule, broadened the definition of the type of water body that would fall under EPA’s formidable clean water enforcement powers, making everything from streams to ditches and watering holes subject to the EPA’s and Army Corps of Engineers’ oversight.