WOW, just found this site Sat. Morning, got to looking around, not many caches in my area so looked at the bench marks. There are bunches and bunches of them around. Went out this evening for about 45 min. & found 3 out of 4. Found out I need to get a brush to take along to scrub the dirt off the markers, also need to look into a dig. camera and maybe even taking along my range finder. The one I couldnt find I will go back and look some more. No witness post as stated, looked as though underground phone cable installed recently, along with farmers mowing. With all the measurements involved with this one I think the range finder will work great.