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  • Norhard AS

Tunnel for the new Risvollelva Hydro Power Plant is completed

Updated: Sep 26, 2021

Length: 800 m

Drilled diameter: 1200 mm

Diameter steel lining: 1067 mm.


The tunnel has been completed in three separate operations:

  1. Directional drilling diameter 400 mm

  2. Reaming to 1200 mm

  3. Installation of lining


More clean renewable energy is now available from the owner of the plant – Sunnhordland Kraftlag.




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