Northern MarionTransmission Line Project

Indiana Michigan Power representatives plan power grid upgrades to improve electric reliability for customers in Grant County.

The Northern Marion Transmission Line Project involves rebuilding approximately 5 miles of 69-kilovolt transmission line connecting Marion Plant Substation off North Branson Street to Hummel Creek Substation off North Huntington Road.

The project strengthens the electric transmission system by replacing deteriorating wooden poles from the 1960s with modern steel poles. Most of the existing poles throughout the line have broken equipment. Upgrading the line with modern equipment improves the line's operational performance, reduces the likelihood of extended power outages and the need for frequent equipment repairs.

Crews plan to rebuild most sections of the power line in or near the existing right-of-way, which could require updating or supplementing current easements. Other sections of the project include re-routes that would require new easements. Easements are defined land rights that property owners grant the utility to allow for the safe construction, operation and maintenance of the power line.

Company officials expect construction to begin early 2024 and conclude late 2024.

Project Updates

October 2022:

  • I&M announces the Northern Marion Transmission Line Project.
  • Michiana Land Services, Inc. (MLS) serves as I&M’s right-of-way representative on this project. Landowners can expect to hear from a right-of-way agent to discuss field activities, construction and restoration.


Project Timeline



The project involves installing steel poles.

Typical Pole Height: Approximately 65 FEET
Typical Right-of-Way Width: Approximately 60 FEET*

*Exact structure, height and right-of-way may vary


Project Fact Sheet Project Map Access Roads Field Activities

Indiana Michigan Power serves 575,000 customers in Indiana and Michigan.

Eric Giffey

Project Outreach Specialist

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