One more noteworthy tidbit... The e-mail correspondence from the permit application mentioned an "RCID Address Finder" - I'd never heard of that before and it sounded interesting so I went digging to see if I could find it, and sure enough, it's a really snazzy little tool. It already has the information for this project loaded into it and confirms that there will be two new bridges - a stationary bridge crossing the small canal near the Sago Cay GF building, and then a large swing bridge crossing the canal that's used for the water pageant and riverboat maintenance.
Below is a link to the tool.
@danlb_2000, I'm sure you'll have some fun with it, assuming it's new to you. You can zoom and and get the address of basically every structure across Disney property, even all the individual Epcot kiosks, haha.
https://rcid.maps.arcgis.com/apps/Solutions/s2.html?appid=ea296a2e5e274cf2856d5cb450c3a96b