May 31, 2024

Replacement of Aging Transformers to Benefit Jefferson County Residents

A new substation upgrade will support increased reliability for customers in Jefferson County.


The Plattin substation’s existing transformers, which have been in service since the 1960s and 70s, were operating at or near full capacity. These factors increased the potential for overloading and outages, particularly during the cold winter months.

The aging transformers are being replaced with units better equipped to handle the current electricity demands of the community, with room for additional load growth in the future. This Smart Energy Plan upgrade will benefit 2,700 customers in southern Jefferson County, including nearby schools. “We know our customers expect and depend on reliable service,” said Jay Garrett, Meramec division senior manager for Ameren Missouri. “Smart Energy Plan projects like this allow us to address aging equipment and modernize and strengthen the electric grid throughout our service territory.”

The transformers installed at the Plattin substation were manufactured by WEG Transformers USA in Washington, Missouri. This partnership continues Ameren Missouri’s commitment to support local communities by using Missouri-based suppliers. The transformers were placed into service in early May 2024.

Upgrades support growing energy demand at Lake of the Ozarks

June 17, 2026

New transformers to support reliability for more than 20,000 Ameren Missouri customers
New circuit breakers benefit 8,000 Ameren Missouri customers

June 16, 2026

Upgrades will reduce costs and support greater reliability at Lake of the Ozarks
New substation energized in Cape Girardeau

May 27, 2026

The Glenwood project is designed to reduce outages and support future growth