I found one place that looked like a possibility:
http://www.ymcaaquaticcenter.com/
I e-mail the aquatic's director several days ago and still have not received a response.
Scott, I have never been to Blue Springs but would defintely be up for going. I am going (scuba) diving at one of the springs tomorrow - just not sure which one yet.
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"Freediving is not a quest for depth or endurance, but rather an experience of communication with our bodies, our breath, and our world" - Emma Farrell, One Breath
Florida Freedivers on DeeperBlue