Reykjavik, Iceland – Landsvirkjun, Iceland's National Power Company, has selected the global engineering consultancy firm COWI to spearhead the engineering design for a significant 65-megawatt ( This strategic project, initiated in early 2025, is a key component of Iceland's ambitious green energy transition and is expected to reach completion by late 2028.   

The Sigalda expansion is part of a broader effort to meet the surging domestic demand for sustainable energy. Working in tandem with the 95 MW Hvammsvirkjun project, also under COWI's design purview, the expanded Sigalda plant will play a crucial role in providing reliable, renewable power to Icelandic households and businesses.

COWI's comprehensive mandate encompasses the full spectrum of engineering design, from initial tender preparations and construction document drafting to in-depth design reviews and detailed risk and cost analyses. Furthermore, COWI will manage the complex integration and coordination required to seamlessly merge the expansion with ongoing renovation efforts at the existing Sigalda facility.   

"With the expansion of Sigalda Hydropower Station, we are contributing to Landsvirkjun's mission to secure sustainable power for Iceland's citizens and enterprises," stated Gunnar Sverrir Gunnarsson, managing director at COWI Iceland. "In recent times, we've encountered challenges in new power supply, impacting business growth. We are confident that COWI's expertise will be instrumental in addressing these issues for the betterment of society."

Eysteinn Einarsson, project manager at Landsvirkjun, added, "Upon completion, the expanded 215 MW plant will enhance the flexibility of our energy supply, enabling us to more effectively meet peak demand. By optimizing the utilization of increased water flow, Landsvirkjun is fulfilling its commitment to maximizing the yield of our entrusted energy resources, guided by principles of sustainable utilization, value creation, and efficiency."

The Sigalda Hydropower Station, originally commissioned in 1978, has been a cornerstone of Iceland's energy infrastructure, generating approximately 920 gigawatt-hours (GWh) annually. Its infrastructure includes the Sigalda Dam, the 14 km² Krókslón reservoir, and a 550-meter tailrace canal connecting it to the Hrauneyjafoss hydropower station. This expansion signifies a continued investment in Iceland's renewable energy future.

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