Why does ComEd manage tree growth near power lines?
To ensure safe and reliable electricity service, vegetation must be kept away from power lines. Tree-related outages, due to falling branches and trees, are a major cause of electrical interruptions on the ComEd distribution system. Additionally, following the major East Coast blackout in 2003 that left millions without power, state and federal authorities placed a greater emphasis on distances between trees and high-voltage transmission power lines because electrical outages can occur if a tree branch is near to or touches a high-voltage power line. ComEd trims trees adjacent to high-voltage transmission lines and removes tall-growing trees underneath these facilities because maintaining proper electrical clearances ensures public safety and electrical reliability. What types of trees are compatible with power lines? Trees and bushes that grow to heights less than 20 feet (for example dogwoods or crabapples), may be approved by ComEd for planting near power lines. Trees that grow more
