Columbia Wind Project

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The Towns​ of Columbus, Hampden, Leeds, Fountain Prairie, Lowville, Otsego, Courtland, Springvale and the Village of Doylestown, Columbia County, Wisconsin

Docket ID: 9836-CE-100

Application of Columbia Project, LLC for a Certificate of Public Convenience and Necessity to Construct, Install, and Operate a Wind Electric Generating Facility Capable of Generating Up to 277 MW, Known as the Columbia Wind Project in the Towns of Columbus, Hampden, Leeds, Fountain Prairie, Lowville, Otsego, Courtland, Springvale and the Village of Doylestown, Columbia County, Wisconsin

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Application Summary

Over​view

Columbia Project LLC, an indirect subsidiary of Alliant Energy Finance LLC, is seeking approval to construct a wind energy generating facility with a generating capacity of 277.3 MWac (megawatt alternating current) in the Towns of Columbus, Hampden, Leeds, Fountain Prairie, Lowville, Ostego, Courtland, Springvale, and the Village of Doylestown in Columbia County, Wisconsin. The project area consists of 48,377 acres of mostly agricultural land. Of these 48,377 acres, approximately 779 acres of temporary ground disturbance impacts are expected during construction of the project, and approximately 90 acres will host the long-term operational facilities of the project. The major components of the proposed project include up to 47 wind turbines, approximately 88 miles of underground 34.5 kilovolt (kV) collector circuits, a 345 kV collector substation, up to three meteorological towers, an aircraft detection lighting system tower, access roads, and an operation and maintenance building. The project proposal includes a total of 59 turbine locations, with 47 proposed wind turbine locations and 12 alternative wind turbine locations. Individual wind turbines can be identified by their identification number. View the Interactive Project Map​ or download the Project Map.

Applicant Stated Need

This project is proposed by an affiliate of a public utility. The Commission must grant approval for the affiliate to own and operate the proposed facility, however, if granted the need for the project is not reviewed by the Commission.

Estimated Cost

This project is proposed by an affiliate of a public utility. Therefore, the Commission does not review the project cost. The cost to Wisconsin utilities, and ratepayers, would be reviewed if the facility or power from the facility is purchased by a Wisconsin utility.

Project Location

The applicant proposes to host the long-term operational facilities for this project on 90 acres of land in the Towns of Columbus, Hampden, Leeds, Fountain Prairie, Lowville, Otsego, Courtland, Springvale and the Village of Doylestown, Columbia County, Wisconsin.​

Proposed Schedule

• The applicant submitted the application to the Commission in December 2025.
  
• If approved, the applicant anticipates construction for this project to begin in Q3 2027 with an estimated completion by the end of 2028.