Oak Ridge National Laboratory Develops Methodology to Convert Abandoned Coal Mines into Energy Storage
Scientists at Oak Ridge National Laboratory (ORNL) have developed a methodology to convert around 500,000 abandoned coal mines in the U.S. into pumped hydro energy storage facilities. This initiative aims to address public health and environmental hazards while supporting energy security and local economies. The Trump administration has allocated $725 million in 2025 for the cleanup of these sites, which could provide jobs and economic growth in declining coal communities. The conversion could stabilize power grids amid increasing energy demands and support decarbonization goals.
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Researchers at Oak Ridge National Laboratory (ORNL) announced a methodology to convert approximately 500,000 abandoned coal mines in the U.S. into pumped hydro energy storage facilities. This conversion aims to mitigate health and environmental risks posed by these sites while enhancing energy security.
The Trump administration has allocated $725 million for cleanup efforts in 2025. The transition could revitalize local economies struggling due to the decline of coal, which is projected to represent less than 1% of the national energy mix by 2035.
ORNL's advanced hydrodynamic and chemical modeling will help assess risks and guide facility design. Converting these mines could also provide stability to stressed power grids as energy demands rise.
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