Seven coastal municipalities in eastern Jutland want to end large-scale seabed extraction after a century of removing sand, gravel, and stone from Denmark’s waters. They argue that marine resources are running out and vital seabed ecosystems are being destroyed.
Denmark’s Seabed Under Pressure
Beneath the waters off eastern Jutland lies a hilly landscape of sandbanks and gravel formed during the last Ice Age. For more than a hundred years, these underwater formations have been dredged and transported to support construction projects, harbor expansions, and coastal protection schemes across Denmark.
Today, areas like Aarhus Bugt and Samsø Bælt are still being mined to supply millions of cubic meters of seabed materials for projects such as the new Aarhus wastewater treatment plant, the expansion of Aarhus and Odense harbors, and shoreline protection works in North Zealand.
But now, seven municipalities—Norddjurs, Syddjurs, Aarhus, Odder, Samsø, Horsens, and Hedensted—say enough is enough. Through a joint initiative called the East Jutland Marine Cooperation, they have appealed to Denmark’s ministers for environment and transport to shut down most seabed extraction zones along the coast. The group argues that these seabed formations are irreplaceable natural resources and important habitats where fish take refuge from oxygen depletion in summer.
New Limits on Extraction
The municipalities propose keeping only four extraction sites active for now, mainly because major infrastructure projects already depend on them. They also want to prohibit mining within three nautical miles, roughly five and a half kilometers, of the shoreline. That, they say, is where marine habitats are most vulnerable.
Municipal marine coordinator Torben Tran Ankjærø explains that moving sand extraction farther offshore would make it possible to harvest raw materials in areas with stronger water flow and less ecological sensitivity. He warns that nearshore sandbanks will not reform if removed, and that many fish species rely on these elevated seabed areas when oxygen levels drop.
When dredging levels the seabed and removes nutrient-rich sand, species such as mussels and starfish lose their habitats. The flat bottom areas left behind recover slowly, especially in zones with weak currents. Some may never return to their original condition.
A Struggling Marine Environment
Experts note that Denmark’s marine ecosystem is already under great strain. Excess nutrients from agriculture, chemical pollutants, and repeated oxygen loss events have weakened the ability of coastal habitats to regenerate. Adding seabed extraction to that list risks pushing the system past its limits.
Senior consultants in marine research point out that nearshore areas are critical breeding and feeding grounds for many species, meaning local disturbances can have wide ecological effects.
Because of that, the municipalities’ letter to national authorities calls for a full stop to dredging in sensitive regions so that fish, plants, and seabed organisms can recover.
Major Projects at Stake
The Danish Environmental Protection Agency lists several upcoming projects that depend on seabed resources near Samsø. These include 6 million cubic meters for Aarhus Harbor, 2.3 million for Odense Harbor, 2.1 million for the new Aarhus Water treatment facility, and 140,000 cubic meters for coastal protection in North Zealand.
The mayors of the involved municipalities argue that restoration must now outweigh short-term industrial demand. They emphasize that Denmark’s coastal zones need larger continuous marine reserves to safeguard biodiversity.
Twenty-one regional interest groups and several property owners’ associations have expressed formal support for the municipal proposal. They believe the government should set an example by protecting these last surviving seabed habitats.
Government Response
Denmark’s Minister for the Environment, Magnus Heunicke, has acknowledged that extracting raw materials as if resources were infinite is unsustainable. He also stresses that the country still requires construction materials for roads, housing, and green projects. Therefore, the government plans to introduce a new national raw material strategy that aims for more recycling and environmentally responsible sourcing.
Several existing extraction permits expire on December 1. The municipalities see this as a pivotal moment to adopt a new direction rather than extend current activities. They suggest removing the nearshore extraction zones from Denmark’s national marine plan entirely.
In the end, the debate highlights how Denmark balances economic needs with the urgent task of restoring its fragile coastal ecosystems. For communities along eastern Jutland, the goal is clear: to stop mining the seabed before what remains of these ancient undersea landscapes is gone forever.
Sources and References
The Danish Dream: Denmark Faces Worst Ocean Oxygen Crisis in Decades
The Danish Dream: Best Energy Providers in Denmark for Foreigners
DR: I hundrede år er havbunden blevet suget op ud for den jyske østkyst – nu kræver syv kommuner det skal være slut
