Public Utility

About Us

American Transmission Co. provides the pathway for power into communities in portions of Wisconsin, Michigan, Minnesota and Illinois.

ATC owns and operates the high-voltage electric transmission system that helps to keep the lights on, businesses running and communities strong.


  • 9,489 circuit miles of transmission line
  • 529 substations (wholly or jointly owned)
  • $3.3 billion in total assets
  • $2.7 billion investment since 2001
  • Reduced energy losses by more than 15 million megawatt hours

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