The U.S. Army Corps of Engineers and EPA jointly announce the availability of the Interim Draft of the National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams (National OHWM Manual) and its accompanying data sheet, and are requesting comments and feedback from the public and practitioners via the public notice available at https://usace.contentdm.oclc.org/utils/getfile/collection/p16021coll15/id/756.