Tree Trimming

NES crews work to control tree growth in order to prevent power outages.  Since an accelerated program began in 2002, the number of tree-related outages has declined significantly.

How NES Trims Trees

The degree to which a tree is trimmed depends on several factors:  the tree species, voltage of surrounding power lines, and the proximity of those lines to the tree branches.

NES follows a lateral pruning method developed by the International Society of Arboriculture (ISA).  Lateral pruning keeps the overall structure of the tree strong and more resistant to high winds and heavy ice.  At the same time, it directs growth away from power lines. 

NES does not “top” or “round” trees because this practice is discouraged by the National Arbor Day Foundation. Learn About Our Contractors.

• Overhang Removal - For large trees with branches hanging over power lines, we require at least 15 feet of clearance above low voltage lines.  With higher voltage lines, no overhang is allowed.

• “V” Pruning - When utility wires run through a tree, a v-cut is made to allow branches on either side of the wire to grow naturally.

• Side Pruning - Interfering side branches are removed from trees adjacent to power lines.

Power lines at the side and rear of a customer's property that are not accessible from a paved or gravel surface require special clearances of 5 to 10 feet on each side of the pole.

In unmaintained areas, vegetation within the clearance distance will be removed.  It may be necessary to remove vegetation outside of the clearance area, depending on the species and amount of trimming required.  Additionally, no vines are allowed to grow on NES poles or equipment. 

Tree Line USA Certified

The Arbor Day Foundation has certified NES as a Tree Line USA utility for meeting three requirements:  a program of quality tree care, annual worker training in quality tree care practices, and a tree planting and public education program.  NES partners with the Metro Tree Advisory Committee, the Nashville Tree Foundation, and the Tennessee Urban Forestry Council.

Keeping You Informed  

You will receive a notice in the mail before any trimming begins.  Work planners will meet with you personally to explain the work that needs to be done and to discuss your concerns.  If a work planner cannot reach you, a door hanger will be left at your home explaining what trimming or removals will occur. 

Feel free to call our tree trimming hotline number, 615-695-7400, if you have questions or need more information.  Frequently Asked Questions