Statnett originally applied for two projects in connection with this power line: Namsos-Storheia and Storheia-Trollheim. In 2010, the Norwegian Water Resources and Energy Directorate (NVE) granted Statnett a licence for development of Namsos-Storheia and in 2012 for the section from Storheia to Trollheim. In the MPE's final decision the two projects were merged into a single project, which will be part of the main grid.
The new 420 kV power line from Storheia to Trollheim will be constructed to realise wind power projects in the Snillfjord area, as the current grid north and south of the Trondheimsfjord does not have sufficient capacity to absorb the new energy production. The MPE has granted a licence to develop just under 510 MW of wind power in the Snillfjord area.