Why are trees cleared near the electricity network?
Electricity network companies must keep the electricity network in a condition required by electrical safety. That's why we regularly clear and treat trees along the electricity network and at and near primary substations. Thanks to the maintenance measures, power cuts are shorter and fewer and electricity distribution remains safe.
We perform maintenance work throughout the year. We always take into account protected or otherwise valuable natural sites as well as Natura and nature conservation areas.
The aim of maintenance clearance is to ensure electrically safe and high-quality electricity distribution
Clearance needs are highlighted during inspections of the electricity network. Inspections are performed with regular intervals both from the ground and from the air with helicopters. Clearance plans also consider future underground cabling in the area and the height of vegetation, and thus not all overhead lines are always cleared in the same area.
When clearing yard and plot areas, we will inform about the work. Information about clearance is available on our website, and we inform the parties concerned in advance. In addition, information is provided to the work environment through signs on vehicles.
We utilise both machinery and foresters in clearance
Clearing is usually carried out by both machinery and foresters. Foresters also consider felling individual trees from any special sites, such as plots, field edges and protected areas. In addition, individual trees outside the line area that pose a clear risk to the electricity network, such as damaged trees leaning towards the line, can be cleared.
Along the electricity network, vegetation is treated below the line by undergrowth clearance, lopping the edges of the line corridor, or by helicopter. In undergrowth clearance, vegetation under the line is removed and, at the same time, trees that reach the line corridor are lopped from the ground. Helicopters are used especially in lopping tall trees.
Landowners will always be notified of any edge zone logging outside a normal regularly maintained line corridor or, in the case of power lines, outside a line clearing, and the extent of the logging will be agreed separately.
Along power lines, trees may not exceed 10 metres in height in front of the border zone and 20 metres behind it. Trees taller than these are sawed or lopped as part of border zone logging.