A pump storage station for Pyhäsalmi Mine

Pyhäsalmi Mine is more than 1,445 metres deep and located in the town of Pyhäjärvi. Underground mining there will come to an end in 2022. One plan for the further utilisation of the mine is to use it as an energy reserve and pump storage station. EPV Energy joined this interesting project at the beginning of 2021 and decided to explore this storage solution further.