Transmission line

The routes of the transmission line (source: Alcoa / PB Power)

In order to transport electricity across the large distances from the hydroelectric power plants to Maniitsoq, overhead transmission lines must be established, just like those we are familiar with from existing hydroelectric power plants - just larger and longer. From the Tasersiaq hydroelectric power plant near the Fjord of Eternity, the transmission line must run a total of approx. 80 miles southwest to Maniitsoq, and must run through very difficult terrain en route. Glaciers, avalanches, lakes isolated by ice, extreme winds and fjord crossings are all factors that need to be taken into account when planning the route.

From Tarsartuup Tasersua the transmission line will run a total of approx. 105 miles northwest to Maniitsoq. It is expected that for the last 14 miles of the route the two lines will be joined and run parallel on the approach to Maniitsoq.

The masts that are designed to support the overhead transmission lines must be very robust and made of steel. Normally it would be preferable to transport the masts by road and erect them using a crane, but due to the difficult terrain it will often be necessary to use a helicopter.

The transmission cable will consist of an aluminum alloy wound round a steel core in order to increase strength. Aluminum is preferred as a material in high-voltage cables since it conducts electricity almost as well as copper, but is both much lighter and cheaper.

On the map below you can see the preliminary path of the transmission line on the basis of the field studies from 2007 - 2009.