I have to assume that most of the pools were built after the ADA, such as:The attractions at any of the parks built before the ADA came into effect were built for efficiency with people walking on. Most queues were designed to start out large and get smaller and smaller the closer you get to the boarding area (like a funnel). This delivers a single file line for orderly boarding.
They were also designed for efficiency in unloading, so many attractions have boarding from one side of the ride vehicle and unloading at the same spot, but on the other side.
Very efficient for people walking on with no wheelchairs, but causes all sorts of problems for people using wheelchairs.
New rides/attractions have to be built to comply with the guidelines that I posted earlier in the thread. That includes some things about the width of the queues, the size of the wheelchair area and the design of wheelchair accessible ride cars. The 'common wheelchair' that is used in the definition is not necessarily the size or shape of most wheelchairs being used. So, there are some attractions, even with ride cars, where the wheelchair an individual person uses won't fit.
The guidelines are also minimums - the same way the minimum guidelines for wheelchair accessible stalls come up with wheelchair stalls that a wheelchair won't actually fit into.
Whether renovated attractions have to comply depends on what was done.
If they change the actual loading or unloading area, they have to comply. Most things other than that are considered 'cosmetic' and they are not required to comply (at least from my interpretation.
The work that was done recently on Pirates was cosmetic. They did not change the load or unload areas or the design of the boats at all.
The work done on Imagination (when they switched from the original attraction to the first renovation) heavily involved the load and unload area, since the old load/unload area is part of the shop now.
The work changing Mr. Toad's Wild Ride to the Many Adventures of Winnie the Pooh was cosmetic as far as the loading/unloading goes. The ride car was considerably re-designed though (Mr. Toad's cars were more like Snow White's with a different theme. Winnie the Pooh's bounce and do 'extra' things like simulate floating.
The recent renovation on Haunted Mansion was cosmetic. I haven't seen the new ride cars yet, but from what I have heard they have upgrades in the sound system. That would be cosmetic too.
There is also another little clause in there about 'feasibility'. Even if the whole ride is totally renovated, it is not required that they meet the guidelines if it's not feasible.
There are some situations where I don't think they were 'required' to make any changes, but they did. The best example of that is Jungle Cruise.
I haven't read the pool regulations at any detail, so I don't know what kind of changes would 'trigger' the requirement for adding accessibility. I did look at them when OKW got a totally renovated pool with a slide to see whether they would be required to put in a zero entry feature and it appeared to me that they would not (and the pool doesn't have zero entry).
I expect there is some 'cosmetic renovation' clause in there too, so much of the work done on pools is actually cosmetic. I also know that they have added 'bump steps' to most pools over the years. Those are an access method listed in the pool guidelines. They work for some people (not at all for my DD, and many other people). I don't see that it would be that difficult to add pool lifts, but if the law doesn't require them..........
Pop Century
All Star Resorts
Grand Floridian
Board Walk
Animal Kingdom Lodge
Just to name a few, ADA isn't that new of a law, these should indeed be addressed, I am lucky that I can handle the current methods of entry and exit, but I am sure there are many that can't and for them this should be looked into, as well as access at the Water Parks, there is a lot we can do with technology and have it be feasible that we couldn't have done 20, 15, 10 or even 5 years ago. These need to be looked at on an ongoing basis as to what is feasible and what isn't, I have come up with ways to make wheelchair accessible vehicles feasible on Pirates of the Caribbean, Most Roller Coasters and many other attractions that currently do not have one, it would be easy to add to Snow White as well. On Splash mount you could make a log that easier to transfer in and out of, thanks to improved water tight seals that we now have, some of which are being use in waterproof digital cameras, which require that you be able to open and close different compartments, obviously it would have to be on a larger scale, but you get the idea.