I did my best Carl Lewis impersonation and jumped the divider and ran 30 feet past where the blighter was.
Another hiker saw another water moccasin a week later on a trail 1/2 mile further north from the river.
so yeah, I'm guessing the spring flooding along the Mississippi river region was doing a number on them.
I have those kinds too but the really large hybrids are the ones I fear. The rattleheaded copper moccasin reigns supreme among snakes. I use my fully auto 12 guage shotgun and my pack of trained wolverines to track them to their den.