2025 March SWS Webinar - Overview of Final Ordinary High Water Mark Field Delineation Manual for Rivers and Streams

12:00 PM - 1:00 PM

Ordinary High-Water Mark (OHWM) delineation has long been a part of identifying aquatic resources that may be subject to federal jurisdiction under Section 404 of the Clean Water Act and Sections 9 and 10 of the Rivers and Harbors Act of 1899.