Osen power station | Agder Energi

Osen power station

Work on Osen power station started in 1963. There is a 2.3 km long water transfer tunnel from the upper reservoir Nespervatn.

Key numbers


Osen power station lies in Sirdal Municipality in Vest-Agder. The municipality has a population of 1,831, and covers an area of 1,554 km², approximately 11% of which is water. Osen is one of seven power stations in the municipality.

The power station makes use of the 67-metre height difference between Nespervatn and Bjørnestadvantnet.

The reservoir has a capacity of 40 million m3.

Tunnel length 2528m
Vertical drop 67m
Operating since 1964
Number Aggregates in operation at the station:1
Agder Engergi owns 100% of power plant
Every second runs the 8m³ water through the plant. Enough to fill 0.8 ten-liter buckets of water every hundredth of a second.

Power producting:

Osen power station supplies 18 GWh to Agder Energi per year, equivalent to 0.22% of the 8200 GWh generated by the group in an average year.
This makes Osen power station the 37th biggest power station in the Agder Energi group.
1000 husstander
Agder Energi’s share of generation covers the annual consumption of approximately 900 households.

Wikipedia, Agder Energi’s own data.