Well, just to be clear, never say "never"
It clearly remember helping Monroe residents sandbag their homes in 1991, and the Ouachita(Lea Joyner) Bridge having to have planks, sealed with tar and backed with sandbags, affixed to the inside of the railings about 20 feet up the bridge on both sides. So effectively one was driving under the flood peak waters when first entering/exiting the bridge. It was a bit disconcerting.
Due to the flood walls and levees on both sides of the river, downtown Monroe and adjacent neighborhoods were spared, but a lot of other communities up and downstream were flooded, as well as neighborhoods along floodplain and bayous that tied into the Ouachita system.
Some more info on Ouachita Parish flooding:
Ouachita Parish Police Jury
That being said, I agree that it has been many decades since Monroe and West Monroe's downtown/core area has suffered from flooding from the river.
But in some years, like 1991, the river came within inches of the tops of the levees. So it is a possibility one should be aware of.
My parents just live 3 blocks from the river, so it is always something to keep in mind, but not dwell upon.
Al