The U.S. Army Corps of Engineers (USACE) and the U.S. Environmental Protection Agency (EPA) jointly announce the availability of the Final National Ordinary High Water Mark Field Delineation Manual for Rivers and Streams (Final National OHWM Manual). The Final National OHWM Manual serves as a non-mandatory technical resource which can be used in appropriate situations to assist with identifying and delineating the ordinary high water mark (OHWM) of rivers and streams located throughout the Nation. A joint public notice announcing the release of the Final Manual is available here: usace.contentdm.oclc.org/utils/getfile/collection/p16021coll9/id/3045.
The Final National OHWM Manual, environmental assessment, response to comments, and other information regarding the OHWM can be found at the following link: https://www.erdc.usace.army.mil/ohwm.