Northern Powergrid are advising farmers and landowners across the area that work will start later this month.
Each year, the electricity distributor inspects around half its high voltage overhead network, checking for any damage or deterioration.
The first flight will take place on 25th June, with the exercise running though until September, inspecting approximately 120,000 poles and 10,000 kilometres of overhead line.
Gary Bartholomew, network inspections manager for Northern Powergrid said: “Our helicopter will be flying at low level and due to the large area we are inspecting will also be flying at a speed of around 30 kilometres an hour.”
“We are aware that the operation may result in some noise or disruption to livestock and the pilot and the observer will make every effort to avoid this while they are flying.”
“We would therefore like farmers and landowners to be aware of our inspection activity.”
“This aerial inspection of our power lines takes place every year to ensure our electricity network continues to run efficiently.”
“Many of these poles and cables are in isolated areas and subjected to extreme weather conditions, such as strong winds, ice and snow.”
“We are committed to keeping power cuts to a minimum, whatever the weather, and that is why regular inspections like this make sure our network is in good condition.”
Anyone who would like more information is asked to call the Northern Powergrid contact centre on 08450 707172.