AES Ohio is proposing to construct a single circuit 138 kilovolt (“kV”) transmission line.

The transmission line will be extended from AES Ohio’s Airport substation to Pioneer’s Union substation, located in Monroe Township, within Miami County, Ohio. This project is part of the upgrades to the electric system in this area required to meet the needs of existing and new customers in this developing region near Dayton International Airport.

Frequently asked questions

The Airport-Union 138kV transmission line project is located off North Montgomery County Line Road East in Monroe Townships within Miami County, Ohio.




Estimated project schedule

November 2022
  • File Construction Notice Application with Ohio Power Siting Board (OPSB)
January 2023
  • OPSB approval

May 2023
  • Construction begins
December 2023
  • Project in-service

Bold-italic text indicates the current project stage

During construction, customers should not notice interruption of their electric service. If an outage is required for a short period, the affected customer(s) will be notified before the outage to limit the inconvenience.

Visit the Ohio Siting Board website to view the application and for more information. The case number for the AES Ohio Airport to Union 138kV transmission line project is 22-0946-EL-BLN.

To contact AES Ohio about the project or request an electronic copy or hard copy of the application, please leave a message at 937-331-4314 or email You will receive a response within 1-2 business days.