Hi Tracey,
During the planning of previous trips, I also relied on the calendar you are referring to but it appears they've currently removed the feature from the site. After speaking with a Cast Member, he confirmed guests should click on, "Things to Do," followed by, "Attractions." As you'll see on the following
Jungle Cruise link, the site will provide you an operational update in red directly on the attraction page.
As a side note, I generally rely on independent sites like allears.net for my one-stop snapshot of what may be closed during my trips. Simply search "Rehabs & Closings." Keep in mind they are always subject to change so be sure to check the "Tip Board" at the central hub of each Theme Park upon arrival for the most up-to-date list.
I hope my answer helped, Tracey, and I wish you a magical vacation! Please visit us again as you trip approaches.
Sherri