Several energy providers launched their plan to provide long-term electric reliability for customers by developing the Upper Midwest’s first 765-kilovolt transmission project, “which will meet the significant growth in electricity use projected in the coming decades and improve access to new energy sources needed to serve communities throughout the region,” they said on Feb. 10.
Great River Energy, ITC Midwest and Xcel Energy have filed Notice of Intent to Construct, Own and Maintain the new 765- kV electric transmission line with the Minnesota Public Utilities Commission.
This notice kicks off the permitting, public outreach and environmental review process overseen by the Commission and is the first step in project development. Similar notices will be filed in other states as part of the development process.
“This transmission line will provide significant benefits to our communities, ensuring we meet the unprecedented growth in their demand for electricity while keeping costs low for homes, farms and businesses,” the companies said. “Some estimates project electric use to double over the coming decades in our region. The 765-kV line is key to maintaining reliability while maximizing the efficient use of land and reducing the overall impact to landowners.”
Great River Energy, a wholesale electric power cooperative, ITC Midwest, an independent transmission developer, and Xcel Energy, an energy company serving 1.8 million electric customers in the Upper Midwest, will develop the 765-kV transmission project in several segments.
The line will connect to the existing transmission grid in eastern South Dakota and travel approximately 410 miles across southern Minnesota to Wisconsin, also connecting into the regional grid in Wisconsin and Iowa. The line will connect the Lakefield, Pleasant Valley and North Rochester substations in Jackson, Mower and Olmstead counties.
The transmission line was one of several approved in December by the region’s grid operator, the Midcontinent Independent System Operator, as part of the second set of projects in its Long Range Transmission Plan.
In this portfolio, MISO approved 24 projects totaling $21.8 billion in transmission investment including several 345-kV projects in Minnesota, North Dakota and South Dakota, as well as this 765-kV transmission backbone infrastructure.
The companies worked with MISO and other stakeholders for several years to develop these transmission solutions as part of a multi-phase plan to bolster the reliability of the region’s electric grid.
While this would be the first 765-kV transmission line in the Upper Midwest, this extra high voltage has been used in other parts of the United States for decades, ITC, Great River Energy and Xcel Energy noted.
A single 765-kV electric transmission line can deliver approximately the same amount of electricity as six 345-kV transmission lines with similar land impacts and structure heights as existing high-voltage transmission lines.
The companies expect to file a Certificate of Need application in Minnesota in early 2026 and will work closely with landowners and communities throughout the project area to help determine the best locations for the route to include in their future Route Permit application.
Each application’s review process takes approximately 12-18 months and includes public information meetings and hearings throughout the project area. The transmission line is anticipated to be in service by 2035.
Additional information on the 765-kV line and 345-kV lines approved by MISO in 2024 is available at gridnorthpartners.com.
