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Trimming Clearance
Clearance
Use this drawing to determine the best location and height for planting trees near distribution (lower voltages) power lines.

Mature Height means the maximum height of the species when it reaches maturity. Distances from utility poles or lines are measured to the edge of the tree canopy, not the trunk.

  • Under 20 Feet Tall- ideal for planting near overhead distribution lines.
  • 20-40 Feet Tall - should be planted so that the edge of the tree canopy is a minimum 20 feet away from overhead distribution lines.
  • Over 40 Feet Tall - should be planted so that the edge of the tree canopy is a minimum 50 feet away from overhead distribution lines.
  • For transmission voltages (greater than 69kv), clearances are different than the drawing shown above. Below are the guidelines to be used:
  • Under 15 Feet Tall - ideal for planting near overhead transmission lines or within the utility easement.
  • 15-40 Feet Tall - should be planted so that the edge of the tree canopy is a minimum of 30 feet away from overhead transmission lines.
  • Over 40 Feet Tall - should be planted so that the edge of the tree canopy is a minimum of 60 feet away from overhead transmission lines.
Some trees may appear to be a safe distance from power lines. However, that may not be the case during a storm or when the lines are carrying a heavy demand. Clearance distances are based on industry guidelines.