Zachary Substation is a 345/161kV substation located in Zachary, Missouri, US. The construction works on Zachary Substation began in 2018. The project was commissioned in 2019.


The Zachary Substation project is a new substation being operated by Ameren Illinois.

The designed voltage level of the project is 345/161kV, while the operating voltage level is 345/161kV. The step-in voltage of the substation is 345kV and the step-out voltage is 161kV. The substation capacity is 560MVA.

Zachary Substation has received approval from Missouri Public Service Commission to undertake the works on the project. Approximately $27m was financed by the authorities for the construction works of the project.

About Ameren Illinois

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Ameren Illinois Co (Ameren Illinois), a subsidiary of Ameren Corp is engaged in regulated electric and gas distribution related activities to various users residing in central and southern Illinois regions. The company is headquartered in Illinois, the US.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.