Transmission line management
In summer 2005, a nature management plan was ordered for the 110-kV high-voltage line corridors. Currently, it is necessary to clear the corridors of high-voltage lines about every five years to prevent the thicket of saplings growing under the lines from getting too close to the power lines. It is also sometimes necessary to cut down high trees at the edges of the line corridors.
The target of the nature management plan is to improve the landscape and to reduce the need for clearing the coppice.
Coppices into meadows
Marianne Kapanen, who studies environmental planning at the Lahti University of Applied Sciences, was engaged to carry out the plans. She surveyed the 55-km long and mainly 30-metre wide high-voltage network in the Helsinki area and made proposals based on the survey for the development of area.
The City of Helsinki owns the line corridors, and the project is based on the City’s nature management and landscaping plans. The areas are classified according to their current state, and observations of the landscape, nature values and species have also been made. The nature values of the area have also been taken into account in the planning.
Transmission line corridors are managed according to a plan that is drawn up each year. Most of the corridors become rapidly overgrown are cleared towards the end of the summer. A minority of line corridors are mown down mechanically late in the summer.