I think Kennecott did that intentionally... talk about a really good punishment to swimmers! A nice parasite will teach them a lesson... haha! In all seriousness, the bubblers could drown someone, not to mention swimmers could very easily get tangeled in the plants growing at the bottom of the lake. Many kayaks (the pedals at least) were broken because of the plants getting wrapped up in them last summer. I don't think people understand the dangers that exist in the lake and why there is no swimming. Obviously the security guards don't care to enlighten them either.