Green Power Express Transmission Line

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Stated Purpose:

The Green Power Express project is designed to address the region's need for transmission infrastructure in an effort  to efficiently integrate vast amounts of wind energy into the electric grid. The existing system is not capable of supporting efforts to meet regional portfolio standards that have been implemented in several states.

Additionally, the project should help alleviate the bottleneck of interconnection requests at the Midwest ISO, many of which are for new wind resources, by creating an outlet for wind generators to deliver their power across the region.

Line Capacity:

765 kV

Route Description:

The Green Power Express is a broad network of 765 kV transmission facilities that is designed to carry 12,000 megawatts of renewable energy from wind-rich areas to demand centers in the Midwest. The project is designed to extend 3,000 miles across North Dakota, South Dakota, Minnesota, Iowa, Wisconsin, Illinois, and Indiana.

Development Time Line:

Construction of the project will begin when all studies have been completed and regulatory approvals received. The route of the project will need to be completed and approved as appropriate. As the large size and scope of the entire Green Power Express project requires various state and federal approvals, ITC hopes to have the transmission lines in service by 2020.

Regulatory Process:

A recent filing with the Federal Energy Regulatory Commission (FERC) of a Federal Power Act Section 205 application, requesting approval of a rate and incentives for the project's construction, was the first of many that ITC anticipates making on behalf of the Green Power Express.

Following these federal approvals, ITC will initiate activities to obtain all state approvals needed for the first stages of the project.


International Transmission Company (ITC)

Community Feedback:

 A major challenge in the development of the Green Power Express is addressing what the line's development will mean for regional cost allocation.

Clean Energy Potential:

The Green Power Express project would transfer 12,000 megawatts of power from the wind-abundant regions of the Upper Midwest, to areas that have a high demand for renewable energy.

The movement of up these 12,000 megawatts of renewable power throughout the Green Power Express has the potential to result in a reduction of up to 34 million metric tons of carbon emissions, which is equal to the yearly emissions of seven to nine 600 megawatt coal plants, or 9 million to 11 million cars.

The project will also facilitate the development of new renewable resources throughout the region.

News Archive:

Rounds' post stirs conflict concerns September 4, 2011

Grid Gurus August 30, 2011

A big day for transmission incentives May 24, 2011

Nation's largest wind farm proposed in Gregory, Tripp counties February 25, 2011

Illinois consumer advocates caution the "Green Power Express" October 19, 2009

Huge "Green Power Express" wind grid gains federal rate incentives April 16, 2009

$10 billion transmission lines for wind power proposed February 10, 2009

Your Thoughts:

We all know that clean energy transmission is vitally important to our energy future. It brings economic opportunity to rural areas, enables wind development and improves the reliability of your grid. But to build it properly - to create projects that work best for you and your community - requires your knowledge and participation. That's why we've created this database.

Is there a way we can improve? Any changes that would make this a more effective tool? Alternatively, do you have more questions about this line? Would you like to receive email updates? Send an email to and let us know!


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