That's funny....but ya never know about these places.
Back in the mid 80's when I was working at an LDS here, a guy came in the shop and told me about a "great quarry in Celina" that I must go dive. So I went, found it, and did a dive. It was most excellent! 40' deep, at least 20' vis maybe more, lots of plant life and tons of fish. There was also some junk piles and 2 vehicles. One was a stripped out mustang, but the other was fully intact and upside down, a Dodge 4x4. I swam around it for a good while before I finally got up the nerve to rub some algae off the windows (which were closed) and look inside. I had to prepare myself for what might be in there...it was empty. I explored the rest of the quarry....and then told a friend...who told a friend, and so on. It only took a month before the land owners came out with bulldozers and mucked it all up, pushing the dry shallow end into the deeper parts. Shame really.
Out of curiosity I looked on Google Earth...that quarry is still there! Looks pretty nice but they've also built houses around it...and it looks like there's a dock on the east wall. I'll bet it's still a nice dive.
Lat: 33.328694
Lon: -96.764670