Mettlen–Lavorgo powerline

The Mettlen–Lavorgo powerline, also called the Lukmanier powerline, is the 400 kV three-phase alternating current high voltage electric power transmission line over the Lukmanier Pass in Switzerland, from Mettlen substation (47°6′55″N 8°20′15″E / 47.11528°N 8.33750°E / 47.11528; 8.33750), next Inwil, about 7-kilometre (4.3 mi) south of Hochdorf, to Lavorgo substation (46°26′28″N 8°50′20″E / 46.44111°N 8.83889°E / 46.44111; 8.83889), next Lavorgo, about 5-kilometre (3.1 mi) south of Faido.

[2] On 28 September 2003, during a storm, two trees hit the powerline in Brunnen causing a major blackout in Italy.

For the 53-kilometre (33 mi) long section between Amsteg and Lavorgo over the Lukmanier Pass 145 pylons for one circuit with one level arrangement of the three conductors are used.

A unique aspect of this line is the 75-metre-high anchor pylon, which stands on 28-metre-high feet of concrete in the artificial lake of Santa Maria, canton Graubünden.

In the Mittelplatten area, the culminating point, the powerline consists of the highest transmission tower in the Swiss power grid, stationed 2,490 metres (8,170 ft) above sea level.