[OldDave]

I know nothing beyond the posting as Asian pointed out. The one thing I found odd, at least to my near ignorance about sink holes, is these house are on top of a bit of a rise. I keep trying to think if you stay away from water, find a higher place, you might be safer. Proves what I know. I also should point out this is really pretty close to the edge of Lake Miona, which is not only the largest body of water around that area, but surrounded by an extensive wetland.