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ATC files application for Barnhart-Branch River project

New facilities would strengthen electric grid in eastern Wisconsin

PEWAUKEE, Wis. – American Transmission Co. is seeking approval from state regulators for a project to improve electric system reliability by reconfiguring the 345-kilovolt transmission grid in eastern Wisconsin.

A regulatory application for the proposed Barnhart-Branch River project, which includes two new substations and a new 345-kV transmission line, has been filed with the Public Service Commission of Wisconsin. Permits also are needed from the Wisconsin Department of Natural Resources.

ATC’s preferred alternative is to convert approximately 51 miles of 345-/138-kV double-circuit line in Calumet, Manitowoc and Sheboygan counties to a double-circuit 345-kV line. This alternative would require a new, approximately 18-mile 138-kV line in Sheboygan County to replace the current 138-kV facilities. The other alternative would be to build a new, 40-mile 345-kV line that essentially follows the Interstate 43 corridor in Manitowoc and Sheboygan counties. The preferred alternative maximizes the use of existing ATC facilities while minimizing new right-of-way requirements, associated environmental impacts and project cost. Estimated costs of the project range from $193 million to $262 million, depending on the project alternative, route and substation sites ordered by the PSC.

Additional 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).