Property owners are only responsible for their own private powerlines. Private powerlines begin at the point of supply. After the point of supply, all the wires, poles and any other electrical equipment (other than the power company's metering equipment) on the property, are the owners responsibility.

High voltage lines are the responsibility of the power company, even if they cross your property. They should be maintained regularly by your power company. If you are worried that trees have grown too close to the wires, or you are not sure whether your lines are private powerlines or high voltage lines please contact your power company.