Midwater Energy Storage Project

Project Details

Docket Numbers
Project Name
Midwater Energy Storage Project
Applicant
Midwater BESS, LLC
Location
Freeborn County -- Shell Rock Township
Description

Midwater BESS, LLC, a subsidiary of Spearmint Renewable Development Company, LLC, plans to build and operate a 150-megawatt battery energy storage system (BESS) and a 2,668-foot long 161 kV high voltage transmission line (HVTL) in Shell Rock Township, Freeborn County, Minnesota. The project, called the Midwater Energy Storage Project, will interconnect the BESS to the grid. Construction is expected to start in the first quarter of 2027, with commercial operations set for the end of 2027.
 

Status
active

Project Contact

Contact
James E. Sullivan
Phone

Project Summary

The Midwater Energy Storage Project, consisting of a BESS Facility and a 161 kV high voltage transmission line (HVTL), is planned for construction in Shell Rock Township, Freeborn County, Minnesota, with construction expected to begin in the first quarter of 2027 and commercial operations by the end of 2027. To proceed, Midwater BESS is seeking a Site Permit for the BESS Facility and a Route Permit for the HVTL Facility from the Minnesota Public Utilities Commission (MPUC). The application follows the Minnesota Power Plant Siting Act and relevant administrative rules, with specific exemptions for energy storage systems like the Project. These permits are the only land use approvals required for construction.

Interactive Map

Key Project Documents

Date
Title
Description
02/17/2026
Notice of Public Hearing
03/01/2026
Midwater BESS Environmental Assessment
02/10/2025
Joint BESS and Transmission Line Permits with Attachments
02/09/2025
In the Matter of the Joint Application of Midwater BESS, LLC for a Site Permit and Route Permit for the up to 150 MW Midwater Energy Storage Project and Associated 161 kV Transmission Line in Freeborn County, Minnesota

Docket Documents

View All Project Documents 

Date Document ID On Behalf Of Description
March 31, 2026 20263-229806-01 PUC Leonard Wabasha
March 31, 2026 20263-229806-01 PUC Leonard Wabasha
March 25, 2026 20263-229642-01 Midwater BESS, LLC Response to Hearing Comments with Attachment 1
March 25, 2026 20263-229642-02 Midwater BESS, LLC Filing Letter with Proposed Findings of Fact, Conclusions of Law, and Recommendations
March 25, 2026 20263-229642-01 Midwater BESS, LLC Response to Hearing Comments with Attachment 1
March 25, 2026 20263-229642-02 Midwater BESS, LLC Filing Letter with Proposed Findings of Fact, Conclusions of Law, and Recommendations
March 24, 2026 20263-229596-02 PUC EQB Monitor Notice - Additional Scoping Meeting
March 24, 2026 20263-229598-01 PUC EIP Agricultural Impact Management Plan for the Midwater BESS in Freeborn County
March 24, 2026 20263-229596-03 PUC EQB Monitor Notice - Public Hearings
March 24, 2026 20263-229596-01 PUC EQB Monitor Notice - Scoping Meetings
March 24, 2026 20263-229598-01 PUC EIP Agricultural Impact Management Plan for the Midwater BESS in Freeborn County
March 24, 2026 20263-229596-03 PUC EQB Monitor Notice - Public Hearings
March 24, 2026 20263-229596-01 PUC EQB Monitor Notice - Scoping Meetings
March 24, 2026 20263-229596-02 PUC EQB Monitor Notice - Additional Scoping Meeting
March 16, 2026 20263-229369-01 PUC Tim Kaasa
March 16, 2026 20263-229297-01 PUC EIP EIP Comments
March 16, 2026 20263-229306-01 Minnesota Interagency Vegetation Management Planning Working Group VMPWG Hearing Comments
March 16, 2026 20263-229306-01 Minnesota Interagency Vegetation Management Planning Working Group VMPWG Hearing Comments
March 16, 2026 20263-229342-01 PUC EIP Tim Kaasa Photographs
March 16, 2026 20263-229344-01 Minnesota Department of Natural Resources
March 16, 2026 20263-229345-01 PUC EIP David Irons
March 16, 2026 20263-229342-01 PUC EIP Tim Kaasa Photographs
March 16, 2026 20263-229368-01 PUC Karissa Studier
March 16, 2026 20263-229345-01 PUC EIP David Irons
March 16, 2026 20263-229344-01 Minnesota Department of Natural Resources
March 16, 2026 20263-229367-01 PUC Dawn Knaack
March 16, 2026 20263-229367-01 PUC Dawn Knaack
March 16, 2026 20263-229368-01 PUC Karissa Studier
March 16, 2026 20263-229297-01 PUC EIP EIP Comments
March 16, 2026 20263-229369-01 PUC Tim Kaasa