The Federal Energy Regulatory Commission (FERC) granted Clean Line Energy Partners approval to sell transmission service to customers at negotiated rates.
The company wants to build a 750-mile high voltage line that would carry electricity generated by wind turbines from Kansas, across Missouri and Illinois, and into Indiana.
Around 206 miles of the line would cross into eight counties in Missouri, including Buchanan County.
Clean Line says the project would provide enough energy per year for more than 1.4 million homes.
The approval allows Clean Line to sell transmission capacity to potential customers of the project including utilities.
Clean Line has filed an application for the project with the Missouri Public Service Commission.
Landowners and the Missouri Farm Bureau have come out against the project.
A Missouri House committee has also passed a bill that would block the Grain Belt Express from gaining eminent domain status.