Sure, I get what dry means. Ships in dry dock are normally very visible above the ground while they are being worked on. However I'm responding to someone talking about sinking these down lower so you don't see them.
So either we're talking about lowering these down below the water level somehow and then not allowing any other water in, meaning some huge overengineered box with tons of electronics and support infrastructure you'd need to install and maintain, which also would have to be visible above the water to cut down on entry points as well as large enough to hide the barges (good luck there), or you're talking about sinking this like WoC which requires the barges themselves to be able to be resistant to the elements and just. And as we know they didn't even figure out they wouldn't easily fit through the canal until it was late in the game.
Now if the prior poster meant some sort of lock system where they raise up each barge and pull them out to some other giant overengineered structure to pass it outside the lagoon, then that could potentially work. But the likely easier, cheaper, and better looking solution would be to widen the canal a little bit during the 4 month closure and long period of attendance caps. Though it still wouldn't be easy or cheap.
I hope one day we can find out just how early or late it was that someone raised the concern about clearances. It's too late to do anything about it now, but I'd just like somewhere to place my anger moving forward.