The contract for client Nord-Trøndelag Elektrisitetsverk is worth about NOK390m (£36m).
The hydropower plant should produce 382GWh per year, enough to supply 20,000 households with electricity. The project has been designed with a strong environmental focus, with close attention paid to the local salmon both during construction and after completion.
Âé¶¹Éç will begin in March 2019 and is due to be completed in August 2022.