Black Diamond - StillwellTransmission Line Rebuild Project

AEP Ohio representatives plan power grid upgrades to improve electric reliability for customers in Holmes County.

The Black Diamond-Stillwell Transmission Line Project involves:

  • Rebuilding about 17 miles of 69-kilovolt power line in Holmes County.
  • Some segments of the power line are under review as route alternatives. See the enclosed map for more information on the location of the proposed study segments.
  • Building Black Diamond Substation off County Road 103 in Mechanic Township, Holmes County.
  • Building Fort Fizzle Substation off SR-520 in Richland Township, Holmes County.
  • Building Schlegel Substation off SR-754 in Ripley Township, Holmes County.
  • Expanding Millersburg Substation off Deetz Street in Millersburg.
  • Retiring South Millersburg Substation off US-62 in Mechanic Township, Holmes County.

Crews plan to rebuild the power line in or near it's existing right-of-way corridor and may need to supplement or acquire new easements to ensure the safe construction, operation and maintenance of the line. Crews expect to begin construction fall 2023 and continue through summer 2026.

Project Updates

Summer 2023: Company representatives are evaluating feedback from the community to determine a final line route.

August 2022: AEP Ohio representatives invite the community to attend an in-person open house from 5:30 to 7:30 p.m. on Wednesday, August 31, at Killbuck Elementary School gymnasium located at 299 School Street in Killbuck. You can view detailed maps and talk with team members about the proposed study segments. There is no formal presentation, so you can arrive at any time during the event.

At AEP Ohio, safety is our first priority. We encourage social distancing to ensure the safety of you and our staff. Hand sanitizer and masks will be available at the open house. We ask that if you are experiencing fever. cough, body aches or other COVID-19 symptoms, please stay home for the safety of your neighbors and our staff.

If you are feeling unwell, you may visit the virtual open house to access information, view an interactive map, enter our virtual open house and submit comments.


Project Timeline



The project involes the use of single steel poles.

Structure Height: Approximately 60-80 feet*
Right-of-Way Width: Approximately 60-100 feet*

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


Property Easements Project Fact Sheet Access Roads Field Activities

AEP Ohio provides electricity to nearly 1.5 million customers.

Maggie Beggs

Project Outreach Specialist

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