Down in the Underground – The roots of a tree are going to grow as big as, if not bigger than, the tree. Planting the tree over underground powerlines, sewer pipes, etc., could end up damaging those lines. Roots are very strong and nature will do anything to make sure it grows. This means damaging any man-made units. This goes for utility lines on poles as well. The tree can’t be underneath or even close to the utility wires in case the limbs and branches get too long. The utility workers will cut down any branches that might affect their lines for safety.