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The intake of Tverråga is difficult to access. Because of this, a choice was made to use a coanda intake with a self-cleaning intake grate. This has reduced the need for maintenance and enabled us to make fewer visits up to the intake.
During construction, a cable railway was established and used to get up the steep hillside of Tverrålia. This solution was chosen because a cable car would entail less encroachment on nature than would otherwise have been the case with a conventional solution. This was also a less expensive solution than traditional operations. From Tverrålia, the penstock continues along with the penstock from Leirelva. This shared trench runs through a relatively easy terrain, but the route also cuts through a farm and had to cross County road 322, which posed a few problems during the construction process.
