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Ameren Missouri plans 10.6 GW of new gas as data center demand grows

Ameren Missouri filed a 20-year plan on Sept. 28, 2026 that raises natural gas from about 5% to 60% of its mix by 2045 and adds 10.6 GW of gas, driven by 2.8 GW of large-load demand by 2030, per Utility Dive and Ameren.

By Greener Numbers Editorial Team · Published October 4, 2026 · Updated 10/4/2026

Ameren Missouri filed its 2026 integrated resource plan, a 20-year roadmap, with the Missouri Public Service Commission on September 28, 2026. Utility Dive reported on September 30 that the plan calls for raising natural gas from about 5% of the utility's resource mix to 60% by 2045 while retiring coal. Ameren's own announcement lists 2,100 MW of combined-cycle gas by 2031, another 2,800 MW by 2035 and 1,400 MW more by 2042.

Utility Dive reports the plan adds about 10.6 GW of new gas, 3.6 GW of solar, 1.5 GW of wind, 2.4 GW of storage and 1.2 GW of new nuclear, and that Ameren expects to seek an operating license extension for its Callaway nuclear plant. The utility serves about 1.3 million customers in central and eastern Missouri.

Demand from large customers such as data centers drives the plan. Ameren says it has committed to serve 2.8 GW of large-load demand by 2030, almost double the 1.5 GW in its 2025 expectations. Its base case has large-load deliveries rising from about 1,400 GWh in 2027 to 44,676 GWh by 2046, a 20% compound annual growth rate.

This is a utility planning filing, not an approved build. The Missouri commission still reviews it, and the figures are Ameren's forecasts and plans as reported by Utility Dive and the company.

Official source: Utility Dive ↗