Boliden's Garpenberg Mine Shutdown Burns 150 Million Kronor Per Week, No Restart Date Set

• Garpenberg, one of Europe's most productive zinc and silver mines, remains shut with no restart date announced
• Ålandsbanken estimates weekly lost revenue at up to 150 million kronor (~€13 million)
• Three workers were hospitalised after a weekend cave-in that triggered a full evacuation
• A prolonged closure could affect European zinc and silver supply chains and force Boliden to revise full-year guidance

Boliden's Garpenberg mine — one of Europe's largest underground zinc and silver operations — remains shut after a weekend cave-in that hospitalised three workers and forced a full evacuation. The company has offered no timeline for when production might resume, Dagens Industri reports, leaving investors to calculate the damage in real time.

Ålandsbanken, the Finnish bank that covers Boliden, puts the mine's weekly earnings contribution at up to 150 million Swedish kronor — roughly €13 million. If the shutdown stretches beyond a few days, the bank concludes, the impact on Boliden's quarterly results will be clearly visible. At that rate, a two-week closure would wipe out 300 million kronor, and a month-long halt would approach the kind of figure that forces a company to revise full-year guidance.

Garpenberg sits in Dalarna, central Sweden, and has operated in various forms since the 13th century. Under Boliden's ownership it has been expanded into a modern, high-volume operation producing zinc, silver, lead, gold, and copper concentrates. The mine processed roughly 3.3 million tonnes of ore in 2023, making it a significant node in European base metal supply. Zinc is used primarily in galvanising steel, and any sustained disruption at Garpenberg tightens a market that has already seen supply constraints from mine closures elsewhere.

The immediate cause of the shutdown — a ground collapse serious enough to injure three miners — raises questions about conditions underground. The Swedish Work Environment Authority (Arbetsmiljöverket) would typically open an investigation after a workplace incident involving serious injuries, though no formal announcement has been confirmed. Boliden will need to satisfy regulators that the mine is safe before workers return, a process that does not move on corporate timelines.

For Boliden's shareholders, the uncertainty is the expensive part. A known two-week shutdown can be priced; an open-ended closure with regulatory scrutiny cannot. The company's stock had already absorbed the initial news of the cave-in and injuries. The production halt and its compounding financial cost are a separate problem — one that grows by roughly 21 million kronor every day the headframes stay still.

Sources: Dagens Industri