Ameren Missouri Proposes Pollution-Heavy Future to Power Data Centers

Ameren Missouri, the utility serving the St. Louis area, has filed a long-range energy plan with state regulators that leans much more heavily on fossil fuels than last year's version. The plan delays the closure of coal-burning power plants, including pushing back two units at the Labadie plant by six years, to 2042, and the Sioux plant to 2035. It also cuts planned solar investment before 2030 nearly in half, from 2,200 megawatts to 1,300, and drops new wind investment before 2030 entirely, while adding 5,400 megawatts of new gas-fired power by 2032. Ameren has also dropped its carbon dioxide reduction goals from the plan's promotional materials.

For homeowners in Ameren Missouri's territory, this matters because it points toward a grid that stays dependent on coal and gas for longer, rather than shifting toward cleaner, often cheaper sources like solar and wind. Gas prices can spike sharply during extreme cold, as happened during Winter Storm Uri, and utilities that lean more on gas can pass those price swings on to customers. Critics, including the Sierra Club, argue the plan is partly driven by rising electricity demand from data centers, and that continued reliance on coal and gas will worsen the extreme weather Ameren cites as a reason for the buildout.

The plan still needs approval from the Missouri Public Service Commission before it takes effect, so nothing changes immediately. Homeowners in Missouri may want to watch how this affects future electricity rates and how much clean energy shows up on the grid in coming years.