*SPOILERS* (Please avoid viewing this pdf if you don't want to see each scene listed by name over the layout of the ride, animatronic layouts, other schematics, etc.)
Mason redid their whole portal system using OpenGov Citizen Services, which you can access by creating a personal or citizen account. I already have one from past uses. It's much easier to access their monthly reports which are posted and can be access without an account. I assume these will be listed on the December monthly report which should be available soon once we hit January.
SPOILER:
It appears there's many different versions of the plans, in which the most recent version was approved after they omitted some HVAC renovations due to budget constraints. It's not like we know the entire ride itself from these documents, but it does list each scene by name and show a general layout of some figures representing what I assume are the animatronics. By looking at the wiring diagrams and equipment lists, you can generally tell where the screens will be located, as well as a few other certain elements.
If mods want to combine this with another thread or keep it separate, that's find by me. I don't think I'm breaking any rules as I think others have posted documents from the city of Mason, but I understand if this isn't allowed.
Project_Barnum_APPROVED_DWGS.pdf