The company filed an application with the Missouri Public Service Commission detailing the project, which is slated for completion by 2031. Positioned adjacent to the existing Sioux Energy Center, the new facility is expected to leverage established site infrastructure and equipment to optimize costs. According to Ameren Missouri leadership, the plant will serve as a vital resource for high-demand periods and support the region’s growing economy, including the influx of data centers.
Ameren Missouri Plans 2,100-Megawatt Natural Gas Facility
Ameren Missouri has proposed the construction of the West Alton Energy Center, a 2,100-megawatt natural gas-fired facility designed to bolster grid reliability. The project, which awaits regulatory approval, aims to provide consistent, around-the-clock power to meet rising energy demands across the state as older infrastructure reaches retirement.
Beyond technical capacity, the proposal emphasizes long-term value for ratepayers. Aaron Melda, chairman and president of Ameren Missouri, noted that the company is utilizing a financing strategy that an internal 2024 analysis suggests could reduce project costs by millions. The development is projected to generate over 1,000 construction jobs, contributing to the state's workforce while securing a more balanced and reliable energy mix for the utility's 2.5 million electric customers.
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