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Iowa and Dane Counties, Wisconsin: 
Jon Callaway
ATC Local Relations
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866-899-3204, ext. 3540

Grant County, Wisconsin and
Clayton and Dubuque Counties, Iowa:

Troy Weary
ITC Midwest Local Government and Community Affairs
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Cardinal-Hickory Creek Transmission Line Project


American Transmission Co., ITC Midwest LLC and Dairyland Power Cooperative have plans for a high-voltage transmission line connecting northeast Iowa and western Wisconsin that would provide economic savings, support renewable energy policy and improve electric system reliability.

A project area from Dubuque County, Iowa, to Dane County, Wisconsin, has been identified for the approximately 102-mile, 345-kilovolt line. Studies indicate that the Cardinal-Hickory Creek Project is a multi-benefit project that would deliver benefits to local communities and the Midwest region by:

  • Improving electric system reliability locally and regionally
  • Delivering economic benefits for utilities and electric consumers
  • Expanding infrastructure to support public policy for greater use of renewables

Project schedule*

Initiated public involvement2014
Project approval, Public Service Commission Wisconsin Fall 2019
Record of Decision, U.S. Dept. of Agriculture – Rural Utilities ServiceWinter 2020
Project decision, Iowa Utilities Board Spring 2020
Authorizations issued, U.S. Army Corps of Engineers and U.S. Fish & Wildlife Service Fall 2020
Initiate construction Fall 2021
Project in service Winter 2023

*For additional details, please see the project schedule. Please also note that construction activities and dates are subject to change.

Project summary

Areas benefited: Iowa, Wisconsin and the Midwest

Length of line: Approximately 102 miles

Voltage: 345,000 volts

End points: The western end point of the line will be in Dubuque County, Iowa. The eastern end point of the line will be the Cardinal Substation in the Town of Middleton, Wisconsin. If approved, the project also will include construction of a new intermediate substation in the Montfort, Wis., area.