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 ATC’s Monroe County-Council Creek Project

Plan includes new substation, rebuilding existing transmission line between Sparta and Tomah areas

MADISON, Wis. – American Transmission Co. on Tuesday received approval from the Public Service Commission of Wisconsin to build the new Timberwolf Substation in the Town of Tomah and upgrade an approximately 17-mile, 161- and 69-kilovolt electric transmission line from the Monroe County Substation in the Town of Sparta to the Council Creek Substation in the City of Tomah.  

“The current transmission system that serves the area is aging and susceptible to overloads and severe low voltages,” said ATC Project Manager Andy Schaeve. “Rebuilding the 69-kV line and adding a new 161-kV line will help strengthen electric reliability for the area. The new line also will provide economic savings by reducing line losses and increasing access to lower cost power.”

The project involves replacing the structures and wires of the existing 69-kV transmission line and adding a 161-kV circuit to the new steel structures. Transmission line work will generally be completed within the existing right-of-way area. To allow for flexibility on the 69-kV system, ATC also will build the new Timberwolf Substation approximately 1/2 mile south of Interstate 90 along Highway 131.

ATC in July 2010 filed an application with the PSC to construct the project. The estimated project cost is $48 million. The line is expected to be in-service in late 2014.

Note to editors: A map and additional information about the project 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).