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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News release: Power line boosts reliability in Columbia County

Columbia-Rio transmission line completed under budget and ahead of schedule

MADISON, Wis. – American Transmission Co. placed in service last week a new 69-kilovolt electric transmission line connecting the Columbia Substation, located in the Town of Pacific, with the Rio Substation, located in the Village of Rio. The new line will also connect to a new Alliant Energy substation – the Wyocena Substation, in the Village of Wyocena..

Construction began last spring on the transmission line, which runs from the Columbia Substation along State Hwy. 16 into the Wyocena Substation. Construction was completed last month, ahead of schedule.

The 10-mile transmission line helps meet local electricity needs and backs up other critical facilities on the electric system. “This new transmission line will help accommodate the increase in electricity usage due to population growth,” said John Garvin, ATC local relations representative. “Completion of this line gives us a solution to past network challenges.”

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Formed in 2001 as the nation’s first multi-state transmission-only utility, American Transmission Co. is a Wisconsin-based company that owns and operates 10,081 miles of electric transmission lines and 582 substations in portions of Wisconsin, Michigan, Minnesota and Illinois. Our transmission network enables the movement of electricity produced from all forms of generation resources to areas where it is needed – helping to keep the lights on, businesses running and communities strong. Visit our website at

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