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    Clinton 345kV Substation Extension Project

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    Clinton 345kV substation extension project

    AES Ohio plans to install a second 345/69kV transformer at the Clinton Substation, located in Wilmington, Ohio.

    This will also require the addition of three 345kV breakers to establish a ring bus, 69kV circuit breakers, and associated equipment. The project is needed to relieve operational loading and reliability concerns on the 69kV system in the area. Also, the project will help improve operational flexibility through the addition of the second transformer and line allowing AES Ohio to take outages in the area for maintenance while keeping a source into the Wilmington area. This project is also needed to help ensure deliverability of the planned solar generation expansions along the Stuart-Clinton 345kV corridor.

    Frequently asked questions
    Where is the Clinton Substation located?

    The Clinton Substation is located on 46 E Dalton Rd, east of SR-68, Wilmington, Clinton County, Ohio.

    Clinton Project Map
    When will the work take place?

    Estimated project schedule

    July 2021
    • File Letter of Notification Application with Ohio Power Siting Board (OPSB)

    August 2021
    • OPSB approval
    October 2021
    • Construction begins
    June 2022
    • Project in-service

    Indicates the current project stage.

    Will electric service be interrupted?

    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.

    Where can I get more information?

    Visit the Ohio Siting Board website to view the application and for more information. The Case Number for AES Ohio’s Clinton 345 kV Extension Project is 21-0679-EL-BNR.

    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.

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