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We prevent power outages from affecting our Chattanooga customers
Why We Trim

Maintaining beautiful trees & preventing outages

Proper pruning ensures healthy trees, and reliable power.

Whether you live in the country or along a shady street, trees and shrubs add tremendous beauty to our neighborhoods. However, they’re also the leading cause of power outages. So we must make sure they don’t grow into power lines and equipment, and potentially disrupt service during storms and severe weather.

EPB partners with hundreds of contracted arborists who properly prune trees year-round to keep them healthy, and clear of power lines – so they’ll continue to be a treasured part of our community for generations to come.

When does EPB trim trees?

Constantly! With thousands of miles of power lines across our service area, we must continually prune in order to keep up with tree growth. In fact, even with dozens of crews working every day, it still takes us 5-6 years to complete a single trimming cycle. Therefore, we must trim tree limbs back far enough so they don’t grow into power lines before we have an opportunity to return to your area.

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Did you know?

EPB trims trees along more than 3,000 miles of overhead power lines? That’s roughly equal the distance from Chattanooga to Phoenix (and back!).

Who trims the trees?

EPB partners with hundreds of Certified Utility Arborists, who are experts at trimming to National Electrical Safety Code (NESC) standards for safety and energy service reliability. We also have ISA-certified arborists on staff to ensure proper pruning practices are adhered to by all contracted Vegetation Management professionals.

How are trees trimmed?

EPB and our contractors use lateral and directional pruning methods, which leave the overall structure of the tree stronger and more resistant to high winds and heavy ice, while directing future growth away from power lines and equipment. These popular trimming methods were developed by the International Society of Arboriculture (ISA), and approved by the National Arborist Association, the National Arbor Day Foundation and the Metro Tree Ordinance.

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Pruning Methods

Overhang Pruning

Used for taller trees if the clearance will be 15 feet above the primary power line.

V Pruning

Employed when high voltage wires run through the middle of a tree’s canopy.

Side Pruning

Employed for pruning trees that are growing closely to adjacent power lines.

EPB's Tree Trimming Guidelines:

  • EPB only trims foliage that poses a potential threat to power service delivery.
  • We trim a minimum of 10 feet away from one-phase primary power lines. We may trim further away from higher voltage lines, and on fast-growing trees.
  • We trim all weak, damaged or dead limbs that hang above conductors.
  • Trimming exceptions include low-growing trees (dogwoods, redbuds, ornamentals) and landscape quality trees less than 6 inches in diameter.
  • If you have a tree growing directly under power lines, we encourage you to let us remove it. We’ll cut the tree down, grind the smaller limbs, and cut the logs into fireplace lengths – all at no charge.
  • As a property owner, you’re responsible for trees that interfere with service lines that run from a transformer pole to your home. But we’ll be happy to lower your service line to allow your tree contractor to trim and remove foliage, and then reinstall service at no charge.

Worried about your trees? Talk to a Pro.

If you see foliage that could potentially interfere with your power service and would like to request a site survey, or you if have questions about your trees and would like an EPB Energy Pro Arborist to contact you, please submit a request below.

Worried about your trees? Talk to a Pro.

If you see foliage that could potentially interfere with your power service and would like to request a site survey, or you if have questions about your trees and would like an EPB Energy Pro Arborist to contact you, please submit a request below.

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