• Ameren Missouri plans to build the West Alton Energy Center, a new 2,100-megawatt facility designed to provide dependable energy at all times of day for customers across Missouri.
• The project will support reliable service during periods of high demand, extreme weather and changing grid conditions.
• By expanding in-state energy production, the West Alton Energy Center will help power Missouri's growing economy while ensuring communities have the electricity they need for the future.

ST. LOUIS, July 27, 2026 /PRNewswire/ -- Ameren Missouri, a subsidiary of Ameren Corporation (NYSE:AEE), announced plans to build the West Alton Energy Center, a new combined-cycle natural gas facility. It is designed to provide reliable, around-the-clock baseload power for customers while keeping costs as low as possible, supporting economic development in the region and strengthening the company's balanced mix of energy.

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