Hi to all. This is my first post. The property that my house is on has a row of tree stumps (about 12 of them) that are about 10" to 14" in diameter along the property line. This was supposed to have been hedges but was neglected for several years. The trees actually grew to about 30 to 40 feet high by the time I finally had them cut down to about 3 feet high. They still grow rapidly! What I would like to do is remove all of these (healthy) stumps and install a 6 ft privacy fence. Do I need to remove all roots of these trees with a back hoe, then back fill with several loads of top soil before going ahead with the fence, or is it sufficient to cut the stumps to the ground? If I were to simply cut the stumps to the ground, what would I use to kill them so they don't grow back? Then, what would happen when the roots began to decompose? Would this create a dangerous soft spot along the fence line that would eventually cause the ground to sink? Also, would a large number of dying roots result in some kind of bug infestation? I would appreciate any advice on this matter. Thanks, Scott.