Answer:
i think it's below the fall line , navigation is nearly impossible.
Step-by-step explanation:
lines of numerous waterfalls, as the edge of a plateau , where streams pass from resistant rocks to a plain of weak ones below. such a line also marks the head of navigation, or the inland limit that ships can reach from a river's mouth; because navigation is interuppted both upstream and downstream, important cities often occur along the fall line . in the eastern United States , a fall line exists between the appalachian , piedmont , and the atlantic coastal plain ; waterfalls or rapids occur on all the principal rivers ( the delaware, schuylkill , patapsco , potomac , james and savannah rivers ) Augusta ga , baltimore , trenton and etc, occur along this fall line. other examples are the fall lines that seperate the narrow coastal plains of Africa, Western Australia , Brazil ,and India from their interior continential shields.