AES Indiana is proposing a new, approximately 10-mile, 345-kilovolt (kV) transmission line: a high-voltage line used to move large amounts of power efficiently over long distances.

 

This line will connect the Antioch Substation near Monrovia to the Blue Bluff Substation near AES Indiana’s Eagle Valley Generating Station. Morgan County is growing. New homes, businesses and community facilities are increasing the amount of electricity the system must deliver. To support that growth and continue providing reliable service, AES Indiana is planning upgrades to strengthen the backbone of the regional electric grid. 

As we move through the project routing and engagement process, please keep the following in mind and visit the FAQ section and additional project information below. 

  • No final route has been selected, dozens of route segments remain under review 

  • Community input is being evaluated and we will have another round of open houses in July 2026 

  • Route evaluation includes engineering, environmental, land use and community considerations among other factors 

  • The project is broader than a single customer and will benefit the region 

Map of proposed Morgan County transmission line routes in Indiana, showing numbered segments and future substations.

Interactive project map and feedback form

We invite you to view the interactive project map and provide your feedback.

Project map

This project covers:

  • Morgan County
  • Town of Monrovia
  • Town of Mooresville
  • Town of Brooklyn
  • Jefferson Township
  • Clay Township
  • Gregg Township
  • Monroe Township
  • Washington Township
  • Brown Township

Details 

What we’re building:

  • Antioch substation
  • An approximately 10-mile, 345 kV transmission line connecting the Antioch substation to the Blue Bluff substation
  • Blue Bluff substation to interconnect with the generation at the Eagle Valley Generating Station

Typical structures 

The project involves the use of steel poles with heights ranging from approximately 115 feet-195 feet and an approximate right of way (ROW) easement width of 200 feet. 

Illustration of a typical 345 kV galvanized steel monopole with multiple crossarms. Labeled details describe approximate height of 115 to 195 feet, span of 700 to 1,000 feet, six to eight structures per mile, minimum conductor clearance of 26.1 feet, foundation width of 6 to 11 feet, and a typical easement width of 200 feet.

Timeline 

Morgan County transmission line upgrade project

Project schedule timeline showing major phases from 2025 through 2030, including planning and siting in winter 2025 through spring 2026, project announcement and open houses in spring through summer 2026, field surveys and engineering from fall 2026 through summer 2028, right‑of‑way communications during the same period, facility construction from fall 2028 through fall 2029, facilities placed in service in fall 2029, and right‑of‑way restoration from fall 2029 through summer 2030.

FAQ

AES Indiana evaluates multiple route alternatives using engineering, environmental, land use, safety, constructability, cost and community input considerations. Feedback from Community Representative Forums, public open houses and landowners is considered before a final route is selected. No single factor determines the final route. 

During AES Indiana’s first round of open houses, held in May 2026, we presented a route segment network of dozens of route sections under consideration. After receiving public comments and advancing our research and analysis, we are in the process of eliminating many of those route segments from further consideration.  During the next round of open houses, to be held in July 2026, we will present several full-length route options for public review and comment. The goal is to select and announce one final route later this summer 2026. 

This project is part of AES Indiana’s long-term planning to ensure the transmission system remains reliable as Morgan County grows and energy needs evolve. While potential large-load customers, including data centers, are evaluated as part of future planning, transmission projects are designed to support the broader electric system. Transmission projects are planned years in advance based on systemwide needs, not to serve a single customer.  

Any large-load customer must complete a separate planning, approval and cost-allocation process before service is provided. 

For major transmission projects like a 345 kV line, AES Indiana installs transmission lines overhead. Overhead lines support reliable delivery of electricity while balancing performance, safety and cost. They allow for efficient inspection, faster access for repairs following storms and the operational flexibility needed to support regional energy needs. Underground lines are typically used for lower-voltage local distribution, but overhead infrastructure remains the most practical solution for long-distance, high-voltage transmission. 

We used publicly available parcel data from Morgan County to collect addresses for property owners along the route segments and one adjacent parcel to those parcels. Once the mailing list was created, we mailed postcard notifications about the project and details about the first round of open houses.  We also placed a newspaper notice about the project and the open houses in the Morgan County Correspondent. AES Indiana will repeat this process prior to the July 2026 open houses.