The U.S. Army Corps of Engineers, Omaha District, (USACE) is evaluating a prospectus by Westervelt Ecological Services for a new Yellowstone River Mitigation Bank Site (YRMBS). The bank would provide compensatory mitigation credits within the Upper Yellowstone (HUC 100700) watershed that are fully compliant with the Compensatory Mitigation for Losses of Aquatic Resources. This notice is to inform interested parties of the proposed activity and to solicit comments.