I’m posting this as a bit of a PSA: the Quarry is only for people who really know how to swim. It’s a good 15 minute walk from your car, there are no life guards, there’s basically nowhere here you can touch the bottom. Depending on how you enter, you might have to swim a good ways to even get a handhold to climb out.
The Quarry has become more popular than ever, and it’s kind of becoming the de-facto recommended swimming hole for newcomers, which I find a bit troubling because it is not for everybody. With its rise in popularity more incidents like this are likely to happen. I love the Quarry, but if you want to go, make sure you are prepared. Even if you are a strong swimmer, you might want to keep a flotation device ready just in case you have trouble.
If you aren’t absolutely certain of your swimming abilities, but want to take a dip, there are other options which are easier to handle.