Earlier this week, contractor Per Aarsleff could reveal that the company had been chosen by Hofor to supply foundations for the 26 offshore wind turbines that will make up the Aflandshage Offshore Wind Farm.
However, the foundation contract is not only good news for Per Aarsleff, it is also good news for the marine environment in Øresund. In any case, the agreement on the delivery of the foundations includes a so-called Nature Inclusive Design in the form of e.g. a kind of artificial rock reef, which consists of large rocks at the foundations, which form crevices and thus hiding places for fish and small animals.
The hope is that it will help to provide more biodiversity in the marine environment and improve the living conditions for cod in particular, which has been in sharp decline in Danish waters in recent years. The artificial reefs will be established at the foundations where it is relevant, Hofor informs in an announcement.
- It is a strategic goal for us to help strengthen Denmark's green transformation, and the turbines will provide the Øresund region with plenty of renewable energy, but it is not CO2-free to build wind farms, and we have therefore chosen to make demands on sustainability for all our suppliers. In the tender material for the foundations, we have demanded that as far as possible we consider and strengthen the marine environment and also reduce the CO2 footprint where possible, says Henrik Plougmann Olsen, director of HOFOR.
Praise from nature association
The association Clean Sea has long drawn attention to the lack of rock reefs in the sea - especially in Øresund. Here, Clean Sea believes that the industry has collected stones without understanding the consequences for the marine environment, and therefore the association is happy about Hofor's initiative with artificial stone reefs.
- In the fight to restore a healthy Danish marine environment at a high ecological level, reefs are one of the best tools we have. In addition to being able to house entire ecosystems, they also make our sea better able to absorb more of the nutrients that are unfortunately discharged into the sea, says Heine Birk Hansen, Board member of Clean Sea.
The foundations will be between 17 and 25 meters high and weigh up to 4,000 tonnes. Each foundation must support a wind turbine, which is approx. 220 meters high at the top of the wing. The foundations will be established in the first half of 2025. The work will be completed in autumn 2025.
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