Is the yazoo river navigable?

The Yazoo River is called the river of death due to it being the burial ground for individuals during the Civil Rights uprising. After being killed the white men would weigh their victims down with...

Yes. The head of navigation is at Minneapolis.

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.

Black River

Yes. Some parts of the river west of Teddington have been canalised, but the river is navigable beyond Oxford.