Phase 1B: Millcreek Expansion Project
The Phase 1B: Millcreek Expansion Project is part of the necessary upgrades to support the increased capacity requirements driven by load growth from large customer projects in the Sidney, Ohio area. The project involves the expansion of an existing 138 kV substation, and the relocation of five existing 138 kV transmission lines, totaling 1-mile, to accommodate the substation expansion.
In addition, AES Ohio will need to construct two 0.8-mile 138 kV transmission lines, and one 8-mile double-circuit 138 kV transmission line. These associated projects will have separate project websites and applications to the Ohio Power Siting Board.
Why is this project needed?
AES Ohio is investing in network enhancements driven by large customer projects in the Sidney, Ohio area. To meet this need, AES Ohio is proposing the expansion of the existing AES 138 kV Millcreek Substation in Sidney, Ohio. This network enhancement will serve the new load and provide increased capacity, flexibility, and resiliency to the northeast region of AES Ohio’s service territory.
Project map
Visit the Phase1B: Millcreek Expansion Project map, where you can also leave your project feedback.
This project covers:
- Shelby County
- City of Sidney
- Clinton Township
Details
The project includes:
- Building a new 345kV transmission line between Atlanta and Fayette substations
- Expanding the existing Fayette transmission substation (associated project*)
- Expanding the existing Atlanta transmission substation (associated project*)
Associated projects have separate Ohio Power Siting Board (OPSB) filings and project websites.
Typical structures
The project involves the use of self-supporting steel poles on foundations with above-ground heights ranging from approximately 115 ft. to 195 ft. with an approximate ROW easement width of 200 ft.
Atlanta-Fayette 345kV transmission line project timeline:
Where can I get more information?
AES Ohio submitted an application for a “Certificate of Environmental Compatibility and Public Need” to the Ohio Power Siting Board (OPSB) in the fall of 2025 and is submitting Amendment 1 to the application in the summer of 2026. The Public Utility Commission has assigned case number 25-0810-EL-BLN to the project and 26-0800-EL-BLN to the amendment. Visit the PUC website at https://dis.puc.state.oh.us/ and enter 25-0810 or 26-0800 into the “Case Lookup” space for additional information about the project.
To contact AES Ohio about the project or request an electronic copy or hard copy of the applications, please leave a message at 937-701-0674 or email aesohionewprojectoutreach@aes.com.
About AES Ohio
- Serving 539,000 customers across 24 counties
- Approximately 19,000 miles of transmission, distribution and underground lines
- 6,000 square mile service territory
AES Ohio invests in our equipment and technology to create a stronger, safer and more efficient electrical system. We know our customers depend on us to provide the electricity they need to power their lives.