Need info on a waterslide (in the lake)?

I used to go to this lake with slides that were placed thru out the lake. I remember having to swim out to the big slide. It cant be that far from nile. Maybe over an hour because I went with camp every year. It might not be around anymore. This was in the 80's. I am trying to just figure out the name and place of this lake. Any info you have I would really appreciate. Thnaks