The Pyhäsalmi Mine, located in the town of Pyhäjärvi, Finland, is one of the deepest known mines in Europe reaching 1,445 metres underground. As mining will end, a globally unique multidisciplinary operating environment, Callio, will emerge. The mine and the surrounding brownfield area offer a diverse range of opportunities for success for new and innovative projects and established operators seeking new horizons alike. Will your business be one of the first to seize the opportunity?

Latest news »

Sandvik – BEVs on the way to meeting their huge productivity potential in operations. The concept diesel-electric truck is being tested at the Callio mine in Finland. International Mining 18.5.2024. Read more.

European deep mine operators looking into underground energy storage. 14.5.2024. Read more.

Gravitricity plans 2-MW gravity energy store at Finnish mine. Renewables Now 5.2.2024. Read more.

Nokia RXRM: igniting the potential of the industrial metaverse. Nokia 25.1.2024. Read more.

Edzcom, Callio Pyhäjärvi using Nokia private 5G wireless network for Finnish test mine. 5.7.2023. Read more.

And again super big news for Pyhäjärvi. EU Commission approves €26.3 million Finnish measure to support Suomen Energiavarasto Oy in construction of hydroelectric pump storage. 7. December 2022.  Read more. 

Super big news for Pyhäjärvi! The pumped hydro storage plant is going forward. €26.3 million investment support for Finlands Energy Storage Ltd. 2.September 2021.  Read more.

Latest publications »

Press release 3.6.2024: Callio project strengthened as Dovre Group Plc joins the consortium to engage in the 85 MW BESS solution. Read more.

Press release 21.5.2024: SENS signs Principal Agreement with Callio for Pyhäsalmi energy storage project. Read more.

Test environments for Oulu and Pyhäjärvi for the development of robotic tools and heavy drones. Arctic Business Journal 4.4.2024. Read more.

Callio press release 1.11.2022: Callio FutureMINE digital testmine of the future – 2,1 m€ Business Finland funding has been secured. Read more.

Callio press release 18.5.2022: A huge solar power plant to the mine tailing ponds – on green electricity operating concentrator plant is the first of its kind in Finland and in the world. Read more.

Callio press release 10.5.2022: Centria University of Applied Sciences and Pyhäjärvi Callio will commercialize MineTRAIN training for the mining industry and underground construction in the Pyhäsalmi mining area. Read more.

Callio press release 21.12.2020: Better Underground Occupational Safety – first trainings have started in Callio Pyhäjärvi. Read more.

Press Release 19 Dec 2018: FutureMINE – Callio Pyhäjärvi transforms to multi-functional and customized testing environment.

Press Release 27 Feb 2018: The world’s highest hydraulic head in the underground energy storage plant – Pyhäjärvi, Finland.

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