Special Column for Successful Gardener
Darrell Blackwelder
January 2, 2003

    After the ice storm of 2002, those that are considering planting trees or tall shrubs under or near power and utility lines should take special precautions. Planting trees directly under overhead utility wires can often become a serious problem as the trees grow to maturity. Many power failures experience during ice or high winds are caused by tree limbs breaking off and becoming entangled in the power lines. Also, trees that have grown up into power lines have the potential to become indirect conductors of electricity, making them harmful or even fatal if they come into contact with people.
    When planting a new tree positioning its difficult to judge how far the tree's branches will spread at maturity. The result is often a beautiful tree that requires expensive pruning which compromises its natural form. The other option, removal, is also expensive and, of course, the whole tree is sacrificed.
    Below are a few criteria to consider when choosing trees to plant under or near power lines.
        * Attractiveness and appropriateness for city neighborhoods
        *A height under 35 feet at maturity
        *Low maintenance requirements
        *Trees that have no serious insect or disease problems
         *Local availability.
    Trees are also much more than just what you see overhead. Many times the root area is larger than the branch spread above ground. Much of the utility service provided today is buried below ground. Tree roots and underground lines often co-exist without problems. However, trees planted near underground lines could have their roots damaged if the lines need to be dug up for repairs.
    The biggest danger to underground lines occurs during planting. Before you plant, be sure to contact local utilities finders to locate underground utilities. Check with your local Cooperative Extension Agent, nurseryman or arborist and discuss tree selection before planting. Many municipalities have tree ordinances with tree boards that have suggestions for planting trees and shrubs under or near utility lines.
   

Darrell Blackwelder is an agricultural agent in charge of horticulture with the North Carolina Cooperative Extension Service in Rowan County.