Missouri Public Service Commission

JEFFERSON CITY, Mo.---The Missouri Public Service Commission (PSC) approved a unanimous settlement agreement for a large load rate plan for the Union Electric Company d/b/a Ameren Missouri to support the growth of electric customers needing 75 megawatts (MW) or more of monthly peak power demand that provides protections for consumers.

The Commission accepted an agreement signed by Ameren Missouri, Staff of the PSC, Evergy Metro, Inc., Evergy Missouri West, Inc., Google LLC, Renew Missouri, Sierra Club, and Missouri Industrial Energy Consumers. The settlement approved by the Commission meets the needs of large electric users looking to grow in Missouri or locate to the state, including data centers and large manufacturers, ensuring they pay their fair share, and protects current ratepayers from bearing an unfair share of associated costs.

Under the agreement approved by the Commission:
    • The rate plan can be used by large load customers, whether new or existing, who reasonably forecast their expected monthly maximum demand of 75 MW at any time during the contract term with Ameren Missouri. The minimum contract term is 12 years, with an optional load ramp period of 5 years for a potential 17-year total commitment.
    • Large load customers will be required, under the approved agreement, to provide collateral equal to two years of minimum monthly bills.
    • The service agreement will automatically extend for periods of 5 years unless there is at least 36 months’ written notice to end the service. A customer not extending the service will face an exit fee and an early termination fee. An additional fee shall apply if the customer seeks to terminate with less than 36 months of notice.
    • Ensures that all costs incurred to serve large load rate plan customers are fully recovered.
    • Provides that a percentage of excess revenues from large load customers be returned to the benefit of all customers of the utility, with excess revenues above a fixed percentage being exclusively dedicated to low-income customers.
    • Offers large load rate plan customers the option to participate in additional generation and capacity programs, including nuclear and clean energy programs.

This approval of the agreement by the Commission is a significant step forward in implementing Senate Bill 4, passed by the General Assembly in 2025. Senate Bill 4 prevents other customer classes' rates from reflecting any unjust or unreasonable costs arising from service to large load rate plan customers. Efforts were also made to design a plan that was similar to other tariffs throughout the country, and across Missouri, ensuring Missouri can properly compete for the economic development benefits that these loads represent.

 

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Case No. ET-2025-0184