Idk, but I've heard about stuff like that too. But it was about Hoover Dam. The story was from my uncle who is an ex Marine and now works as a cop in Vegas. He had a friend who went to investigate why divers were disappearing in Lake Mead. Well, they had to dive down into the lake and check for themselves. The water was super murky, visibility was very poor with their high powered lights. Said about 40 ft down, they could barely see in front of them. Then something hit his friend from behind and he turned the light towards it. All he saw was a huge tail, the guy was 6'3" and he said the tail was easily as tall as he was. Needless to say, they freaked out and headed to the surface as quickly as they could. Was about 9 years ago when he told me this. XP