Know of any volunteer opportunities?

[johnstcb]

Hey everyone!
I am a High School Science Teacher in a South Metro suburb. I received my open water certification while an Undergraduate, and I am interested in any volunteer opportunities that would allow me to utilize my dive skills. I have contacted the Minnesota Zoo, but I don't have any other ideas (I'm assuming Emergency Services and Police Departments employ their own personnel with certification and would not accept volunteers-I have heard this from several people I have spoken with).  I would even be interested in diving to inspect boats, docks, etc., anything that gets me back into the water. Does anyone have any ideas?
Thanks!!