United States of America

Dion R Holm— 156.8 MW Hydroelectric

HydroRenewableVerified: Jul 2026

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Dion R Holm stands as a noteworthy hydroelectric power generation facility in the United States, ranked 1622nd among the country's 10,047 power plants. With a capacity of 156.8 MW, it contributes a mere 0.01% to the national energy grid, which boasts a staggering total capacity of 1,386,385 MW, primarily fueled by natural gas. This position highlights the relative scale of this plant within the broader U.S. energy context, where hydroelectric power, while significant, is outpaced by gas-driven generation. The technology utilized at Dion R Holm focuses on hydroelectric generation, leveraging the kinetic energy of flowing water to produce electricity. This method is not only renewable but also offers a lower carbon footprint compared to fossil fuels. Commissioned in 1959, this facility has provided decades of reliable energy, showcasing the longevity and sustainability potential of hydroelectric power. Dion R Holm is situated in a region rich in hydroelectric resources, with several neighboring plants enhancing the local energy landscape. Nearby facilities include the Collierville Powerhouse (253 MW), R C Kirkwood (115.5 MW), and Moccasin Powerhouse (100 MW), among others. This concentration of hydroelectric plants underscores a regional commitment to harnessing renewable resources, promoting energy resilience and sustainability. On a national scale, the United States is characterized by a diverse mix of energy sources, with natural gas being the dominant fuel. Hydro plants like Dion R Holm contribute to diversifying this mix, providing not only energy security but also a pathway toward reduced greenhouse gas emissions. While the share of Dion R Holm in the national capacity is small, its operational stability and contribution to the local grid are significant. Operated by the City & County of San Francisco, Dion R Holm exemplifies municipal investment in renewable energy infrastructure. The facility's long operational history indicates a commitment to maintaining and improving hydroelectric capabilities, which are vital as the country seeks to transition away from fossil fuels. As the U.S. moves towards a more sustainable energy future, the role of plants like Dion R Holm will be increasingly important. They represent not only a commitment to renewable energy but also a necessary component of the broader strategy to mitigate climate change impacts. The future of hydroelectric power in this region may hinge on innovations and investments that enhance efficiency and expand capacity while preserving the environmental integrity of water resources.