There was actually a company that specialized in salvaging sunken logs from old lumber operations in Lake Superior. https://www.nytimes.com/1997/09/24/us/with-

There was actually a company that specialized in salvaging sunken logs from old lumber operations in Lake Superior. https://www.nytimes.com/1997/09/24/us/with-timber-scarce-old-logs-deep-in-a-lake-become-a-sunken-treasure.html https://www.nytimes.com/1997/09/24/us/with-timber-scarce-old... Company went out of business (ran out of logs?) in 2015.