The Army Corp gives guidance on what defines a navigable waterway: http://www.nap.usace.army.mil/Portals/39/docs/regulatory/regs/33cfr329.pdf http://www.nap.usa

The Army Corp gives guidance on what defines a navigable waterway: http://www.nap.usace.army.mil/Portals/39/docs/regulatory/regs/33cfr329.pdf http://www.nap.usace.army.mil/Portals/39/docs/regulatory/reg... It should be noted that rivers and streams shift over time and so there is no comprehensive list of navigable waterways.