Midwater Energy Storage Project
Project Details
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.
Project Contact
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 |
|---|---|---|
| February 10, 2025 | Midwater BESS Joint Permit Application | Joint BESS and Transmission Line Permits with Attachments |
| February 9, 2025 | Notice of Public Information and Environmental Assessment Scoping Meetings | 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 |