To bring electricity over large distances from hydroelectric power stations to Maniitsoq, air transmission lines must be established, just as we already know them from existing hydroelectric power plants - just more powerful and longer.
From the Tasersiaq hydroelectric power plant at Eternity Fjord, the transmission line must run a total of approximately 125 km southwest to Maniitsoq and along the way pass very difficult terrain. Glaciers, avalanches, lakes dammed by ice, extreme wind load, as well as fjord crossings are all factors that must be taken into account when planning the route.
A potential line from Tarsartuup Tasersua will run a total of approximately 169 km northwest of Maniitsoq. On the last 23 km of the stretch, the two lines are expected to meet and run parallel on the final stretch towards Maniitsoq.
The masts to hold the air wires up must be very strong and made of steel. Normally it is preferable to carry the masts overland and set them up with a crane, but due to the difficult terrain, it will more often be necessary to use helicopters.
The transmission line will consist of an aluminium alloy wrapped around a steel core to increase strength. Aluminium is the preferred material for high-voltage power lines as it conducts electricity almost as well as copper, but aluminium is a both a much lighter and cheaper material.
On the map below you can see how, on the basis of field studies from 2007-2009, where a transmission line is envisaged to go.