Cardinal Hickory Creek Project | PSC Docket ID: 5-CE-146

 Cardinal-Hickory Creek Project Information

Preliminarily authorized route: view map

Project Summary

    • Applicant's Stated Need: The Applicants state that the proposed project would provide substantial net economic, reliability, and public policy benefits to Wisconsin, Iowa, and the region. The applicants also state that the project would provide flexibility for the regional transmission system to respond to the ever-changing energy markets and generation portfolios.

    • Estimated Cost: The total project cost, including the portions that would be paid for by the entire MISO region, is between $492M and $543M, depending on the route chosen for the transmission line, but the entire cost would not be borne by Wisconsin customers. If the project is approved, Wisconsin customers will pay for approximately $66M to $72M of the total project costs (depending on the route chosen); the rest of the projects costs would be shared by the rest of the MISO region.

    • Project Timeline: ATC anticipates commencing substation construction in October 2020 and transmission line construction in October 2021, and placing the transmission line and substation in service in December 2023.

    • Project Location (see map): ATC has developed a Preferred Route and other route segments for this project. In Wisconsin, the proposed routes would cross the Mississippi River near Cassville, WI, and travel to the existing Cardinal Substation in Middleton, Dane County.

      • Mississippi River Crossing to a new Substation in Hill Valley (Montfort, WI): The Preferred Route is approximately 34 miles in length and passes through Grant County. The Alternate Route is approximately 52 miles in length and passes through Grant, Lafayette, and Iowa counties.

      • From a new Hill Valley Substation (Montfort, WI) to the Cardinal Substation (Middleton, WI): The Preferred Route is approximately 53 miles in length and the Alternate Route is approximately 50.3 miles in length. Both routes pass through Grant, Iowa, and Dane counties.
    Opportunities for Public Participation

    Current opportunities for public involvement in this proceeding are as follows. Members of the public may attend all hearings, and comment at one of the following public hearing sessions:

    For parties to the proceeding:

    ​Monday, June 17, 2019 - 9:30 a.m.
    PSC Hearing Room (S105) – 1st Floor Public Service Commission
    4822 Madison Yards
    Madison, Wisconsin

    ​For a member of the general public:

    Tuesday, June 25, 2019 - 2:00 p.m. & 6:00 p.m.
    Youth & Agriculture Center Auditorium Extension Grant County
    916 E Elm Street Lancaster, Wisconsin

    Wednesday, June 26, 2019 – 2:00 p.m. & 6:00 p.m.
    PSC Hearing Room (S105) – 1st Floor
    Public Service Commission 4822 Madison Yards Way Madison, Wisconsin

    Thursday, June 27, 2019 - 2:00 p.m. & 6:00 p.m.
    Banquet Center
    Dodger Bowl Lanes 318 King Street
    Dodgeville, Wisconsin

    The Commission intends to webcast all hearing sessions live at:

    Instead of commenting at a hearing, a member of the public may, by Friday, June 28, 2019:

    1) comment on-line at, or

    2) by mail a comment to:

    Docket 5-CE-146 Comments

    Public Service Commission

    P.O. Box 7854

    Madison WI 53707-7854




    Statutory Review

    This is a Type I project under Wis. Admin. Code § PSC 4.10(1). The Commission and the Department of Natural Resources will jointly prepare an Environmental Impact Statement (EIS) for this project.

    • A draft EIS will be issued in early 2019.
    • There will be a 45-day comment period after the draft EIS is issued.
    • Comments received will be used to prepare a final EIS, which is anticipated to be issued in Spring, 2019.
    • The final EIS will be one subject of a hearing in the project area to be held later in the review process.

    PSC transmission line review process overview (pdf).

    Project Contacts

    Additional Project Resources: