Those logs have been soaking in lake water since the mid 1930's. I doubt
you can pick them out of the water in one piece anymore.

They re pulling up Hundred year old logs in good condition

Underwater Logging
An Eco-Friendly Wood Choice
Using its patented SawfishT technology, Triton's harvesting team
carefully cuts and raises standing trees from the bottom of hydro dam
reservoirs flooded over the past century.In this oxygen-deprived
environment, wood-decaying fungi and microbes are unable to attack the wood,
leaving it in a non-living, but preserved state.

http://www.tritonlogging.com/harvesting.html