Who at Disney confirmed that the purpose of this permit is to build a walkway?
The
site/location on this permit - issued by the stormwater department - is, yes,
Grand Floridian to MK Walkway. This does not seem to be a department that would have anything to do with issuing construction permits.
I don't have your inside knowledge, but I agree with your analysis. If we're wrong I'd be happy to share that crow with you. I'll bring the wine.