Before any tree work can be performed on private property, utility contractors must notify tree owners, except under certain easement conditions. Door hanger notifications are provided when tree owners are not home. For work on public property, the appropriate highway official or municipal tree warden generally grants permission.
Eversource and UI undertake two types of tree work:
- Scheduled Maintenance Trimming (SMT) is performed on a regular basis area, with a goal of trimming roughly 15 to 25 percent of circuits every year. The clearance required for SMT is eight feet on sides, 10 below, and 15 feet above the line.
- Enhanced Tree Trimming (ETT) is higher-priority tree trimming and involves work closer to substations that would potentially impact more customers. ETT protects the "backbone" of the electrical distribution system and requires clearances of eight feet on the sides, 10 feet below and removal of all overhanging limbs whenever possible or a minimum of 20 feet above the line.
Trees that are decayed, insect-infested, damaged or structurally weak may be removed.
Small trees and saplings that are capable of growing into the conductors are normally removed before they grow tall enough to interfere with the lines.
Limbs are pruned using a tree-care industry technique known as “target pruning”. Each limb is pruned back to a point where it meets the branch collar so that the pruning cut will callous over and prevent decay of the pruning wound.
If there are any concerns or questions regarding this program please contact our Tree Warden.