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Korsnäs commences environmental surveys

By: James Bernthal-Hooker 14/06/2021 Metsähallitus

General Windfarms

Metsähallitus has commenced environmental surveys for its 1.3 GW Korsnäs offshore wind farm, located in the Gulf of Bothnia, 15km off Finland. These surveys are part of the environmental impact assessment, which has been contracted to AFRY Finland. So far, bird surveys have begun.

AFRY subcontracted Alleco Oy to carry out surveys on herring spawning. Simultaneously, bird population surveys have been launched by the University of Vaasa’s Vaasa Energy Business Innovation Centre (VEBIC).

‘We use spawning surveys to identify potential spawning areas for the Baltic herring in the project area and its surroundings. In the sea area, we conduct a diving survey at under 10 metres, where we look for herring eggs,’ Karoliina Jaatinen, a senior specialist at AFRY, stated.

‘Herring eggs attach on hard surfaces or over algae where the diver observes their density and collects the sample for further determination. After the field survey, we determine the degree of development and vitality of the roe.’ In addition to fishing surveys, these diving surveys provide important additional information on the significance of the sea area for the fish population.’

Much has changed since previous project plans emerged, including the planned locations of the 70 to 100 turbines. ‘We have … reviewed new materials and specified the location of the Korsnäs offshore wind farm so that the new project area is located further away from the Kvarken Archipelago World Heritage Site, nature conservation areas and fish spawning areas,’ explained Pertti Tapio, Project Leader for Wind Power Business at Metsähallitus.

‘At the same time, wind power farms can be constructed further out at sea in deeper areas., Tapio continues. In other words, construction projects further out at sea have less impact on the environment than those in the shallow coastal areas.

‘The exact visibility of the planned wind turbines will be modelled as the project progresses, and for this purpose we will capture a video of the area, possibly as early as June.’

Tapio also expressed hope that COVID-19 restrictions will permit in-person public events after the summer.

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Korsnäs commences environmental surveys

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