• Formed in 2001 as the nation’s first multi-state transmission only utility
• Companies that transferred transmission assets or cash to ATC now are equity owners
• A transmission-owning member of the Midwest ISO, Midwest Reliability Organization and Reliability First Corporation.
• Regulated by the Federal Energy Regulatory Commission for rates and tariffs
• Regulated by states for siting transmission infrastructure
• Headquartered in Pewaukee, Wis., with approximately 535 employees working in Wisconsin and Michigan.

• 9,440 circuit miles of transmission line
• 519 substations (wholly or jointly owned)
• $3.1 billion in total assets

• Two system operations centers
• Peak demand: 12,048 MW
• Service area includes portion of Wisconsin, Michigan, Minnesota and Illinois

Construction Program

• $2.7 billion investment in the transmission system since 2001
• Upgraded more than 1,700 miles of lines
• Built 540 miles of new lines
• Improved 140 substations
• Supported 1,100 megawatts of new peak electric usage
• Connected 5,711 megawatts of new generation at 21 sites
• Reduced energy losses by more than 15 million megawatt hours
• $3.4 to $4.4 billion investment planned over the next 10 years based on our 2011 Ten-Year Transmission System Assessment