Dairyland Power and GridLiance Heartland form joint venture for MariBell Transmission Project
By Global Infrastructure Sherpa · Feb 21, 2026
MariBell Transmission Project
Project
Dairyland Power and GridLiance Heartland are forming a joint venture to build the MariBell Transmission Project, an approximately 140-mile double circuit transmission line carrying 765 kilovolts and 161 kilovolts of electricity from Marion, Minnesota, to Bell Center, Wisconsin.
Deal Analysis
Dairyland Power Cooperative and GridLiance Heartland have announced a joint venture to develop the MariBell Transmission Project, a significant undertaking involving the construction of a 140-mile double circuit transmission line across Minnesota and Wisconsin. This partnership aims to enhance electricity transmission capacity, carrying 765 kilovolts and 161 kilovolts of electricity, likely addressing growing energy demands and improving grid reliability in the region. The project underscores the increasing need for investment in modernizing and expanding transmission infrastructure to support evolving energy landscapes.
The involvement of GridLiance Heartland, backed by Blackstone through GridLiance West, adds a layer of financial strength and development expertise to the project. While the financial details remain undisclosed, the scale of the infrastructure suggests a substantial investment. This deal highlights the trend of partnerships between established utilities like Dairyland Power and private equity-backed developers to tackle large-scale transmission projects, leveraging the strengths of both parties to navigate complex regulatory environments and secure necessary funding.
- Joint venture between Dairyland Power Cooperative and GridLiance Heartland.
- Involves construction of a 140-mile double circuit transmission line.
- GridLiance Heartland is backed by Blackstone through GridLiance West.
- Project aims to enhance electricity transmission capacity across Minnesota and Wisconsin.
Market Context: The transmission sector in the US is experiencing significant growth driven by the need to modernize aging infrastructure, integrate renewable energy sources, and improve grid resilience. Partnerships between utilities and private equity firms are becoming increasingly common to finance and execute these large-scale projects.
Source Intelligence
KEY DETAILS
The transmission line is approximately 140 miles long. "The MariBell Transmission Project is a joint venture between Dairyland Power and GridLiance Heartland to build an approximately 140 mile double circuit transmission line carrying 765 kilovolts and 161 kilovolts of electricity."
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Location
The proposed line would run from Marion, Minnesota, to a substation in Bell Center, Wisconsin, crossing the Mississippi River near Genoa and traversing Vernon and Crawford counties.
PARTIES MENTIONED IN SOURCE
D
Dairyland Power
developer
"The MariBell Transmission Project is a joint venture between Dairyland Power and GridLiance Heartland to build an approximately 140 mile double circuit transmission line carrying 765 kilovolts and 161 kilovolts of electricity."
G
GridLiance Heartland
developer
"The MariBell Transmission Project is a joint venture between Dairyland Power and GridLiance Heartland to build an approximately 140 mile double circuit transmission line carrying 765 kilovolts and 161 kilovolts of electricity."
N
NextEra Energy
"In a recent interview , Jessica Hewitt, a project manager with one of the partners NextEra Energy explained that using the interstate as a corridor for the line is not that simple."
T
Transource Inc.
"Sarah Bratnober of Viroqua warned the board about the next segment of the transmission project managed by a different developer called Transource Inc."
high quality
Enriched Feb 24, 2026
Market Context
This deal is part of the Transmission sector in USA.
1 of 139 Transmission deals tracked this month · Updated daily