The floats aren’t the only thing that needs to go through that canal though. The steamboat has to travel through to go around to the dry dock for maintenance and refurbishments. I’ve always heard the steamboat just barely fits under the monorail beam. So it would probably need to be around 60-70 feet tall.
I forgot about that. Disney would have to construct a bridge similar to the one in WS that opens to allow the globe and other barges out into the Lagoon for Illumniations.