United States of America

Horse Mesa— 129.5 MW Hydroelectric

HydroRenewableVerified: Jul 2026

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Ranked as the 1819th largest power generation facility in the United States, Horse Mesa holds a notable position in the hydroelectric sector, being the 160th largest hydro plant out of 1469 nationwide. With a capacity of 129.5 MW, it contributes significantly to the local grid, particularly in the context of its predominant fuel type—gas—which dominates the national energy landscape. Horse Mesa, commissioned in 1961 and operated by Salt River Project, leverages the natural flow of water to generate electricity, embodying a renewable energy source that helps diversify the region's energy portfolio. Located approximately 50 kilometers from several notable plants, Horse Mesa is part of a diverse energy cluster. Nearby, the Santan plant operates with a robust gas capacity of 1326 MW, presenting a stark contrast to Horse Mesa's hydro output. Other nearby facilities include Mormon Flat and Roosevelt, both hydro plants with capacities of 63.5 MW and 36 MW, respectively. The Poseidon Solar LLC and Queen Creek Solar Farm add to the mix with their solar capacities of 20 MW and 19 MW. This array illustrates the variety of energy sources in the region, showcasing how Horse Mesa complements the existing grid by providing a renewable alternative to gas-dominant generation. Nationally, the United States has a total of 10,047 plants generating an impressive 1,386,385 MW of power, with natural gas being the most prevalent fuel type. Horse Mesa's 129.5 MW capacity represents a small but vital segment of the national grid, particularly in the context of increasing demand for clean energy solutions. Its share of the total capacity, while modest, underscores the importance of hydroelectric power in achieving a balanced energy mix. The Salt River Project operates Horse Mesa, emphasizing its commitment to sustainable energy solutions. Since its commissioning in 1961, the facility has played an integral role in supporting the energy needs of the surrounding communities and the broader grid. Looking ahead, the significance of Horse Mesa is poised to grow as the nation shifts towards greener energy solutions. With increasing emphasis on reducing carbon footprints and enhancing energy security, hydroelectric power will likely remain a crucial component of the energy landscape in the United States, particularly as facilities like Horse Mesa continue to demonstrate the viability and reliability of renewable resources.