The Power of Partnership

The MariBell Transmission Project is a joint development by American-owned companies, Dairyland Power Cooperative and GridLiance Heartland. As a member-owned generation and transmission electric cooperative, Dairyland Power Cooperative proudly serves 24 electric cooperatives, 27 municipal utilities and power supply customers across Wisconsin, Minnesota, Iowa and Illinois. A subsidiary of NextEra Energy Transmission, GridLiance Heartland and affiliated companies have over 3,100 miles of transmission lines in development and operation across North America. 
 
Together, this team is committed to working closely with communities and citizens to maintain transparent communication and thoughtful planning throughout every stage of this project. 

Project Timeline

The timeline is an estimate and is subject to change as the project develops.
2025 - 2031
Public / Landowner Outreach & Permitting
2031 - 2034
Project Construction
2034
Project In Service

Total Length and Location

The Midcontinent Independent System Operator (MISO) assigned the proposed transmission project to Dairyland Power Cooperative and GridLiance Heartland. We will build and maintain approximately 140 miles of modern, reliable infrastructure that stretches from Marion, Minnesota to Bell Center, Wisconsin.

thumbnail_MariBell - Zoomed In - MN & WI Counties_101325

Minnesota Segment

Located in southeastern Minnesota in Olmsted, Mower, Fillmore and Houston counties

Wisconsin Segment

Located in southwestern Wisconsin in Vernon and Crawford counties

Strengthening Our Community:

Investments in Local Infrastructure Benefits Schools and Roads

The MariBell Transmission Project will generate new tax revenue that supports local initiatives — like schools, roads and emergency response services. Transmission investments like MariBell are carefully planned to deliver value to your community while keeping costs low.

construction-workers-crane

Powering Minnesota's Economy*

Nearly 800 new construction jobs.
$400+ million in local and state property taxes over the life of the project.
$200+ million in annual economic benefit from construction and operations.

Powering Wisconsin's Economy*

Nearly 300 new construction jobs.
$30+ million in state tax revenue over the life of the project.
$70+ million in annual economic benefit from construction and operations.

*Economic analysis by Strategic Economic Research, LLC. 

dunes-mooers-lake

Designing a Line That Fits the Local Landscape

Dairyland Power Cooperative and GridLiance Heartland will limit land impacts by using existing transmission corridors where possible. MariBell will be designed to minimize land use and visual impact. The team continues to conduct detailed environmental analyses to protect wildlife habitats and aquatic resources, as well as cultural, tribal and historic resources across Minnesota and Wisconsin. 

Stay Connected

Sign up for project updates to stay informed about how the MariBell Transmission Project will help power homes, farms and businesses across the Upper Midwest.

Drop us a Line

Do you have questions about the MariBell Transmission Project? Please email the team at connect@maribelltransmission.com.

Terms

Privacy Policy

Safety Policy

©2025 Dairyland Power Cooperative and GridLiance Heartland LLC. All rights reserved.