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The City of Portland, Oregon

Portland Trees

Call before you cut

phone: (503) 823-TREE (8733)


1900 SW 4th Avenue, Portland, OR 97201

Identifying High Voltage Power Lines

Wires above trees are categorized as either high voltage or not high voltage wires. High voltage wires often (but not always) run on one side of the street.

Signs that wires are high voltage:

  • Transformers
  • Insulators
  • Trees along the street are pruned away from the wires

Signs that wires at not high voltage:

  • Trees are permitted to grow into wires

High Voltage Wires                                       Not High Voltage Wires

   high-voltage wire with transformer and insulator       overhead communication and service wires

Transformer and insulator present                              Communication and service wires

trees pruned away from overhead wires          trees growing through overhead wires

Tree is pruned away from wires                                    Tree is growing through wires


Contact your electric company

Portland General Electric

Tree Trimming 503-736-5460 or 800-544-1794

Pacific Power

Tree pruning & vegetation management: 1-888-221-7070