If you plant your tree too close to power lines, it may have to be trimmed or removed later. Keep the following distances in mind when planting trees:

• Low Zone: The low zone is the area directly under the power line and extends to 4.5 metres (15 feet) on either side. Trees and shrubs planted in this area should have a maximum mature height of 4.5 metres or less.
• Medium Zone: The medium zone extends from the edge of the low zone to a distance of 7.6 metres (25 feet) on either side of the power line. The maximum mature height of trees planted in this zone should be 7.6 metres.
• Tall Zone: The tall zone is the area more than 7.6 metres (25 feet) from the power lines. Virtually any strong, healthy tree may be planted in this zone.
  
  Contact Hydro at 1.888.737.1296 if you have questions or concerns about vegetation near power lines or if you notice a tree that poses a potential hazard.