On 5 October 2009, NTE and Østfold Energi announced that they, through their 50–50% joint venture Norsk Vannkraftproduksjon had bought the power stations Siso and Laksola from Elkem for NOK 4.3 billion.
On 5 October 2009, NTE and Østfold Energi announced that they, through their joint venture Norsk Vannkraftproduksjon, acquired the power stations Siso and Laksola from Elkem for NOK 4.3 billion.