Plymouth County supervisors unanimously pledged their support Wednesday morning to the Rock Island Clean Line Electric Transmission Project.
The proposal would move power, generated by future wind farms in the northwest Iowa region, along a 500-mile overhead high voltage direct current transmission line to Illinois.
The project has been in the works since at least 2010.
Plymouth County supervisors hope the line will encourage wind farm growth, locally.
"The plan, as has been laid out by the Clean Line group, is that there would be wind towers generating energy in eastern Plymouth County. Most notably east of the Floyd River Valley," said Don Kass, a Plymouth County supervisor.
Clean Line Energy Partners is behind the line. They anticipate construction to start in 2014, and last about three years.