American Transmission Co. projects

Project website for a Wisconsin-based company that owns and operates the high-voltage electric transmission system that powers communities in portions of the Upper Midwest.

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PSC approves new transmission line project, issues order for rebuild project

Projects support local distribution networks and improve electric reliability

PEWAUKEE, Wis. – The Public Service Commission of Wisconsin yesterday approved a new electric reliability transmission line project near the village of Eden. At an open meeting, the commissioners agreed on the need for the Creekview Interconnection Project and approved the north route proposed by ATC in its application filed earlier this year.

“This 138,000-volt transmission line will support the low-voltage distribution system in the region by connecting to a new We Energies substation,” said Barbara Mikolajczyk, ATC project manager.

The project was announced in spring 2014 and includes a new We Energies substation, called Creekview, located on the north side of County Highway F, east of Greenway Road, and a new, 9-mile, 138-kV transmission line to provide service to the new substation. The new transmission line will be co-located with an existing 345-kV line.

The estimated project cost is $25 million to $26 million; a more refined cost estimate will be included in the PSC’s final order for the project, which is anticipated to be issued within the month. Construction is projected to begin in fall 2016, with an in-service date of January 2018.

On Tuesday, the PSC issued an order to rebuild a 14-mile, 138-kV transmission line in southeastern Wisconsin. The St. Martins-Edgewood-Mukwonago Rebuild Project runs from the St. Martins Substation in Franklin to the Edgewood Substation in Big Bend, and continues on to the Mukwonago Substation in Mukwonago.

“The lattice tower structures on this line are approximately 90 years old and are at the end of their useful life,” said Andy Ehlert, ATC project manager. “Replacing the aging structures will help maintain the reliability of the area electric transmission system.”

One hundred fifty aging lattice structures will be replaced with 126 steel, single-pole structures, and the wires also will be replaced. No new right-of-way is needed for this project. Construction is anticipated to begin in fall 2017 to meet an in-service date of June 2018. The estimated cost of this project is $24.7 million.

Note to editors: A map of the projects’ routes, along with other information, is available at

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ATC is a Wisconsin-based company that moves energy along the regional electric grid in parts of Wisconsin, Michigan, Minnesota and Illinois, serving more than 5 million electric consumers. We are experts at what we do: planning, maintaining, operating and protecting the grid. As the electric industry moves toward renewable generation sources, we are transforming our system to continue delivering energy reliably and safely. We proudly support STEM education programs that empower youth with the skills needed to succeed in tomorrow’s energy workforce. For more information, visit and follow us on LinkedIn and X (Twitter).