New substation supports greater reliability in Jefferson County

Ameren Missouri's Smart Energy Plan upgrade benefits more than 4,500 customers in the area

One of Ameren Missouri’s newest substations is bringing more reliable service to the people of eastern Jefferson County. The original Horine substation served parts of Pevely and Herculaneum for more than 50 years. Since it was first built in the 1970s, the population in the area has more than doubled.

Please click on the above photo to watch a video on Ameren Missouri’s latest Smart Energy Plan upgrade in Jefferson County.

Thanks to Ameren Missouri’s Smart Energy Plan, this aging infrastructure has been replaced with a new, higher-capacity substation equipped with smart technology. This includes upgrades designed to automatically detect problems and reroute power in these instances, often reducing outages from hours to minutes, even seconds. Additionally, this new substation not only meets the existing energy needs of the community but was constructed to handle the area's future growth as well. Overall, the new substation represents a $6.5 million investment in Jefferson County.

The Smart Energy Plan was enabled by the Missouri Legislature's passage of Senate Bill 564 in 2018 and approved for extension and expansion by the General Assembly in 2022. Through the Smart Energy Plan, Ameren Missouri is working to upgrade and modernize the electrical grid, while also improving reliability throughout its service territory.