Alexandria to
Big Oaks

Current status

Xcel Energy has begun construction activities in support of the Alexandria-Big Oaks project - building the Big Oaks substation and adding the second circuit to the existing CapX2020 transmission line.

Big Oaks Substation

Work on the substation has begun and is expected to be completed in late 2027.

2025 and 2026 construction activities

In 2025 the primary work was near the Alexandria Substation area where crews began installing the concrete foundations in areas where new structures are needed. All new foundations and structures will be installed in the existing right of way.

2026 activities

Placement of matting and foundations between the Alexandria Substation and the Riverview Substation is underway and construction for this segment is expected to be completed by late January 2026. Following completion of that work, matting and foundation installation will begin on the segment between the River View Substation and the Quarry Substation near Waite Park. The final segment from the Quarry Substation to the new Big Oaks Substation near Monticello is anticipated to be completed in late 2026.

Helicopter work along I-94

We will work with local officials when helicopter work will occur along I-94 to ensure the safety of drivers along the interstate. That coordination may include brief lane or road closures, and additional traffic control.

Please contact us with questions about the work as it is ongoing.

Project overview

Several Minnesota energy companies that built the CapX2020 Fargo-St. Cloud/Monticello transmission project have proposed a new transmission line that will add new transmission infrastructure to increase reliability, reduce grid congestion, and increase access to new renewable energy in Minnesota and the Dakotas.

The Alexandria-Big Oaks project will mainly involve adding a new transmission line on the existing CapX2020 structures between Alexandria and a new substation to be located on Xcel Energy property near the Sherco power plant in Becker, Minn.

The Alexandria-Big Oaks project is associated with the Big Stone South-Alexandria-Big Oaks project, which submitted a combined Certificate of Need application to the Minnesota Public Utilities Commission. Learn more about the Big Stone South-Alexandria project here, including the status of route development on that western segment of the project.

If the Certificate of Need and eastern segment Route Permit are approved, construction could begin in late 2024 and be complete in 2026.

Project Need

Minnesota's electric grid has served customers reliably for more than a century as our energy system has grown and changed. In recent years, utilities have added new renewable energy, such as wind and solar, and retired aging plants. Additional plant retirements and renewable additions throughout the region require us to build new transmission projects to deliver electricity from where it's generated to where it's used.

Additionally, as the system has changed, the existing system is under stress and experiences congestion, which limits the amount of electricity that can reliably be delivered to customers. The Big Stone South-Alexandria-Big Oaks project will help reduce that congestion, providing benefits to customers throughout the Upper Midwest.

Regulatory Process

Minnesota law requires energy companies proposing high-voltage transmission lines to apply for a Certificate of need and a route permit, which are reviewed by the Public Utilities Commission following a public review process. To view the certificate of need application, eastern segment route permit, and other filings in the proceeding, click here (mn.gov/puc), click on e-dockets, and select 22-538 (22 stands for the year 2022 when information was first filed), and click 'search.' For the eastern segment route permit application and relevant documents, select 23-159.