Corner Stones and Survey Monuments
To property owners, as well as engineers, survey monuments which last forever and can be easily distinguished from surrounding rocks, are of the utmost importance. Expensive re-surveys and legal fights can be avoided by making such monuments easily distinguishable, permanent, and in such a way as to avoid confusion with other marks. The use of concrete for this purpose fills all the requirements better than any other material.
Get from the proper public official (usually the county engineer or surveyor) the exact location of corner stones. Drive four stakes in the ground so that strings stretched between every other stake will cross each other directly over the original monument.
Remove the old monument, and, with a post auger, bore a hole deep enough to reach below the frost line (at least 3 feet deep), where the old monument stood.
Fill the hole with concrete mixed 1: 2: 4, rounding the top with the hands so it will extend 3 or 4 inches above the level of the surrounding ground.
While placing the last foot of concrete, imbed a harrow tooth, iron bolt, or gas pipe, with its top just showing above the finished concrete at a point directly under where the strings cross. Protect the monument from damage by stock for one week, by placing a box over it.