I'm working to clear a new property boundary through heavy woods on 6 to 20% slopes. I'm impressed that the surveyors got into some of these spots to drive a stake.
I'm using a Topcon grade laser to follow the path. The stakes, some of which I didn't know were placed, all are falling dead-on to the path. You don't know they're there until you're within about 10-15 feet sometimes. I'm using a chainsaw and a large Echo trimmer with a steel, triple-blade head to cut the path. There is LOTS of surface rock around, and the steel trimmer head, though making regular contact with it, is holding up very well. It is incredible how well it cuts small trees and of course the thorns and brush.
Here are a few pictures.
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