33.Cfr 328.3 of the us code defines the OHWM. The USCOE identifies the OHWM as evidence of submersion except for MAJOR FLOODING as per their guidance . The courts usually defer to them in questions of application . You may have file suit in federal court to obtain your rights if you have a county attorney who is in the pocket of the landowners . But the law is that the state holds title to the banks of all navigable rivers and holds these in the public trust for the use of all peoples.