As proposed, the "Water of the United States" (WOTUS) rule would dramatically expand the amount of wet areas that would become federally controlled. Given the controversy surrounding it, the Office of Management and Budget's (OMB's) period of review is likely to be impacted.Just over one year ago, the U.S. EPA and the Army Corps of Engineers published a proposed rule known as the "Waters of the United States" (WOTUS) that would define the scope of the environmental regulations under the 1927 Clean Water Act (CWA). This act applies to "navigable waters" of the United States, and the Supreme Court has ruled twice in the last decade that the term implies that some waters (i.e. those that are not navigable) are not covered. The new WOTUS rule e...