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Tree Pruning The majority of trees pruned along power lines can be safely maintained through directional pruning. Trees that pose hazards to power lines because of ill health, high rate of growth or location must be removed The APS Pruning Specifications are developed using the American National Standards Institute Accredited Standards Committee: A300 Standard (Part I) Pruning for Tree Care Operations. Our pruning practices follow industry Best Management Practices from the International Society of Arboriculture, endorsed by the Tree Care Industry Association, Utility Arborist Association, and the National Arbor Day Foundation Directional pruning involves pruning the tree so the remaining and future branch growth is directed away from the power lines. Entire branches and limbs may be removed back to the main trunk of the tree. To determine the extent of pruning requirements, it is necessary to consider the tree species, location of the tree in relation to the power line, environmental conditions, line voltage and length of the pruning cycle. Even though trees may be pruned to an unnatural shape, proper pruning practices permit the trees' natural defense systems to protect the tree from decay.
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