Trees, transmission lines and your safety

Trees growing near transmission powerline easements are carefully monitored to ensure that they do not pose a risk to the safety of the public, or to maintaining a safe and reliable electricity supply. Protecting the safety of the public, contractors and employees is TransGrid’s highest priority. 

It’s in everyone’s interest to help manage the growth and health of trees near powerlines. Trees growing too close to the high voltage network can cause fires, blackouts and power surges.

Planting wisely

If you have an easement on your property, you can minimise the need to trim or remove trees by choosing a species that will maintain the required clearance from the easement.  

Avoiding planting large trees near powerlines is the best way to protect your local electricity supply and minimise the need for trimming.

Easements can vary in width depending on the operating voltage and design of the infrastructure. Before planting a tree, consider the: 
  • Required distance from an easement.
  • Maximum allowed height in relation to the easement. 

Identifying hazard trees 

Maintenance teams regularly check transmission lines to identify any nearby hazard trees that may need to be trimmed or removed. 

Our maintenance program requires the removal of hazard trees near transmission lines to ensure we continue to deliver a safe and reliable supply of electricity to the network. If these trees are not removed, they have the potential to:
  • Destroy, damage or interfere with the electricity works
  • Make the electricity works become a potential cause of bushfire
  • Make the electricity works become a potential risk to public safety.
Maintenance checks include aerial patrols using a remote sensing method called Light Detection and Ranging (LiDAR). LiDAR is used to identify any trees that could create a safety or bushfire risk.  

Staff may also need to access an easement to maintain, construct, or operate sections of the network. This can include transmission lines, cables, towers, poles, and switching stations. 


If you have any questions, please phone our Community Information Line on 1800 222 537 or email