Missouri at 2,540 miles
The Nile river is the longest river in the world, though its hard to say if its "navigable" or not given that at two points in the river it has large rapids and waterfalls.
The state of Mississippi is the 32nd largest of the US states. (The Mississippi River is the longest single river in the US. The Jefferson-Missouri-Lower Mississippi combination is the longest combined flowing river, 4th longest in the world, although much of the western Missouri is not navigable.)
The river in Ghana that is not navigable is called the Volta.
Colorado river is the longest river in us(1450 miles)
Navigable rivers in Jamaica include the Black River. The Rio Grande, Martha Brae River and the Great River are also navigable.
Navigable rivers in Jamaica include the Black River. The Rio Grande, Martha Brae River and the Great River are also navigable.
beacuase its water
The longest river in the United States is the Mississippi
mississippi
The Amazon River is not the longest river in the US. It is the longest river in South America.
Dams and cataracts.