It is a very interesting (if a bit suburban/parking lot-ish in design) proposition. I genuinely like the idea of a marina that can double as a tourist/entertainment destination. That's a niche that really has yet to be filled on our stretch of the Mississippi.
But this commenter from the NextSTL update has a point:
Justin Wolfe • 20 hours ago wrote:
Who ever thought it is a good idea to put a marina above the chain of rocks hasn't thought this one through.
The Army Core of engineers calls the Chain of Rocks Reach
"a 17 mile series of rock ledges ... extremely difficult and dangerous to navigate."
This is an opportunity for folks to put their boat a few hundred yards upstream from an "extremely difficult and dangerous" water hazard. You'd likely have sufficient clearance in something with a shallow draw like a john boat, but there are very strong currents that a little boat could struggle to deal with. Larger boats are in real danger of bottoming out on some fairly sharp rocks.
They're going to have to make it plainly obvious that it's dangerous to motor downstream, and even then I'm sure there'll be some who launch from the marina and ignore the warnings; they could easily end up in a life-threatening situation.