Missouri Public Service Commission

JEFFERSON CITY, Mo.---The Missouri Public Service Commission (PSC) has granted a certificate of convenience and necessity (CCN) to Ameren Transmission Company of Illinois (ATXI) relating to transmission investments in North Central Missouri.

The Commission authorized ATXI to construct, install, own, operate, control, manage, and maintain slightly over 200 miles of 345 kV transmission lines across the Missouri counties of DeKalb, Daviess, Grundy, Sullivan, Adair, Knox, Lewis, Marion, Macon, and Randolph – referred to as the Denny-Zachary-Thomas Hill – Maywood Project, or DZTM Project.

Commissioners approved ATXI to transfer an undivided 49% interest in certain transmission facilities for the DZTM Project to the Missouri Joint Municipal Electric Utility Commission (MJMEUC) shortly before applicable portions of the DZTM Project are placed into service.

In its order, the Commission approved a double-circuit option for the design and route of the Denny to Zachary segment of the project, which would be co-located with the 161 kV circuit owned by Associated Electric Cooperative, Inc. for the length of the Denny to Zachary segment, requiring significantly less disruption of landowners along the route.

A letter from Senator Rusty Black, which was co-signed by Senate President Pro Tem Cindy O’Laughlin, Representative Mazzie Christensen, Representative Dean Van Schoiack, and Representative Danny Busick, expressed support for the co-location strategies in the project.

“I respectfully encourage the Commission to support Ameren’s request to implement co-location in the DZTM Project. These measures reflect the kind of innovative, cooperating planning that Missouri should continue to promote as we modernize and expand our energy infrastructure,” wrote Senator Black.

The Missouri Public Service Commission regulates investor-owned electric, natural gas, steam, manufactured housing and modular units, water and sewer companies, and has limited authority over telephone providers in the state. The Commission ensures the public has access to safe, reliable and reasonably priced utility service. The Commission must balance the interests of the public – ratepayers – as well as company shareholders. In proceedings before the Commission, rates are set to allow the utility company an opportunity – but not a guarantee – to earn a reasonable return on its investment after recovering its prudently incurred expenses.
 

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Case No. EA-2025-0087