SDC had a GREAT concrete waterslide located just across the road from the campground (wilderness) they only had it there for a few years, maybe late 70s through about 80 or 81. Tore it out when Whitewater went in. It's too bad, 'cause it was a wonderful waterslide, themed with the fake "rocks" like you see at SDC. Nice and shady. At the top of the slide was a big concrete area that looked like a cave with a waterfall splashing down on your head before you went down the slide. I don't know if RUBE has any pictures of it or not. I don't even think I have any pictures of it in the promotional stuff I kept from that period. Now, if the water slide you are talking about is the "cool off, ride the giant water chute" concrete water slide in Branson, yeah, I think it's still there. it has had many owners over the years, and was even closed for a season or two, but, as far as I know, is still there and operates each summer.