American Transmission Co., LLC


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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