Langdon Mills Solar Project

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Towns of Courtland and Springvale, Columbia County​, Wisconsin

Docket ID: 9818-CE-100

Ursa Solar, LLC seeks a Certificate of Public Convenience and Necessity from the Commission to construct a 200-MW solar energy generating facility called the Langdon Mills Solar Project. 

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Application Summary

Overview: Ursa Solar, LLC seeks a Certificate of Public Convenience and Necessity from the Commission to construct a 200-MW solar energy generating facility called the Langdon Mills Solar Project. The project also includes an on-site substation, an operations and maintenance building (O&M), a Battery Energy Storage System (BESS), and a 20-40 foot long electric generation tie line to connect with the existing electric grid.

Applicant stated need: Ursa Solar, LLC is an independent power producer. Therefore, the need for the project is not reviewed by the Commission.

Estimated cost: Ursa Solar, LLC is an independent power producer. Therefore, the cost for the project is not reviewed by the Commission.

Project Location: Ursa Solar, LLC proposes to construct this project on 1,201 acres of land in the townships of Springvale and Courtland in Columbia County, Wisconsin.

Proposed schedule: 

  • Ursa Solar, LLC submitted the application to the Commission in October 2022. 
  • Ursa Solar, LLC estimates the project would start construction in Q4 2024.​
Statutory Review

The solar electric generation facility is a Type III​ action under Wis. Admin. Code § PSC 4.10(3). The battery energy storage system (BESS) is a Type II​ action under Wis. Admin. Code § PSC 4.10(2)​. ​The Commission will prepare an Environmental Assessment (EA) for this project that will evaluate the location of the project and its potential environmental, community, and private property impacts. There will be a preliminary determination when the EA is complete that will determine whether the preparation of an Environmental Impact Statement is necessary. Comments on this preliminary determination will be accepted and considered before a final determination is made. At the time of the preliminary determination, the Commission shall make copies of the EA available to those persons that request it.


Key Application Documents


Case Contacts and Additional Information

Access Docket 9818​-CE-100 in the PSC Case Management System to view​ additional information.

Utilize the Staff Involved tab for contact details for PSC staff assigned to the docket, including the case coordinator and the environmental review coordinator.

Click the Documents tab for a complete list of docket documents categorized by document type.​

Access Doc​ket 9818​-CE-100

Opportunities for Public Participation

The Commission offers several opportunities for public participation in its proceedings. For construction projects, these opportunities may include providing input regarding the scope of environmental impact documents, attending public hearings sessions, and signing up for emails for updates related to a particular case.


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