Åseral Nord


New dam Langevatn, rockfill dam with asphalt core and approx. 400,000 m3 filling mass, with new overflow threshold and retaining walls in concrete. Transfer tunnel from Langevatn to Nåvatn - approx. 8.5 km tunnel in total with a cross section of 30 m2 with constructions for hatches and transverse gates in concrete inside the tunnel. The water flow goes to Øygard power plant, Kvernevatn power plant, Expansion of Skjerka power plant

Area of ​​responsibility

Risk management, Purchasing management, construction management, tender management

Form of contract

Unit price contract



Project value

kr 600 000 000

Year of construction


Project link

Services performed

Personnel with experience on project