Constructing a new transfer tunnel

Constructing a new transfer tunnel

The works at Brokke Nord were completed in spring 2014.

Brokke Nord

This project included the structural works for the power plant. This included the construction of a new transfer tunnel, construction of the Sarvsfoss reservoir and Skarg power plant.

Brokke Nord

Project scope. The Bjørnarå river and five other streams have been routed to Sarvsfoss via a 10.6-km long transfer tunnel. The new transfer tunnel has four inlet shafts and the tunnel cross-section is 22 m2. A new 50-metre high dam was constructed at Sarvsfoss to provide damming for the inlet reservoir for the Skarg power plant. The Sarvsfoss dam was constructed using concrete with a volume of 15,500 m3 and a length of 140 metres. The crest of the dam has a dual-cambered design.

New power plant. A 420-metre long tunnel system has been blasted for the construction of Skarg power plant and a complete power station was constructed in the open terrain. The power plant was constructed in the eastern part of Botsvatn where the water is utilised before being stored in Botsvatn. The old transfer tunnel is now used as a drift tunnel. Blasting, mass transport, securing, injection and concrete work were also included in the project.

Project details:

  • Contract type: Prime contract
  • Contract sum: MNOK 472
  • Construction time: From 01/05/2012 to 01/04/2014
  • Developer: Otra Kraft DA
  • Client: Otra Kraft DA

 


The developer Otra Kraft DA har produced this video about the tunnel works at Brokke Nord.