This is the kind of item that gets a professional surveyor excited.
The DNR's Matt Dontz found this original cedar survey post in a stream near Atlanta, in Montmorency County recently. The General Land Office of the U.S. government did the survey of Michigan's townships in 1850. The post was set to mark a section, or quarter corner and were driven into the ground each half-mile. It was preserved by the water, Forestry and Surveying experts agree the find is extremely rare, even with today's GPS technology.
This got ugly. We're grateful we missed it.