With all that success maybe I'll have to rethink how deep I might need to go. However, the lakes in Michigan are much older, in terms of when people started using them, compared to the relatively new Lakes in Washington State. Had a dive friend who lived across the street from me and was a disabled vet. Diving was the one thing he could do without creating pain for himself. He'd usually burn up two 80s a day and found all kinds of good things just scrounging and swimming the break between shallow and deep. Found five silver ingots. Thought they were lead to start with. Reported the find to the police and in checking the serial numbers they were not reported stolen. He got them back in a month or so. He also found a bunch of cast brass antiques Buddhas. They were worth probably more than the silver ingots. He was the founder of the Lake Washington Braille Divers Club. I was a charter member but he's the one that scrounged all the goodies.
On Lake Union, (connected to Lake Washington via a canal), when Seattle was becoming a city, they had houses of ill-repute (their term not mine) along the lake. The city fathers finally decided that was not the right thing to do for an up and coming city so they outlawed them. When those places and their amenities were being dismantled much of it got thrown into the lake. My friend found a perfect porcelain bidet complete with all the brass fixtures. He brought it home, restored it, placed a circulating electric pump in it, and served punch from it at a Braille Diver picnic at his place. He had at least six 3 ring binders full of pictures of his finds, the dates, the depth, the bottom time and all. He has since passed and I lost contact with his family as they all have moved. If I could get my hands on those books I write a book about him and his finds. It'd be called, Lake Washington Braille Diver. RIP Bill. Jim