Wind turbines
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Alliant Energy applied Thursday to expand its wind power operations in Iowa, adding to a similar application approved last year, the company said in a statement.

The $890 million project, which was submitted to the Iowa Utilities Board through its Iowa-based company Interstate Power and Light, could generate up to 500 megawatts of wind energy. Alliant received approval in 2016 for a different wind power project. The two projects could total up to 1,000 megawatts, which could power up to 430,000 homes a year.

The company's application to the board did not specify where the projects would be located.

A decision on the most recent application is expected sometime in early 2018.

"The customers and communities we serve will benefit from this cost-effective clean energy," Doug Kopp, president of Interstate Power and Light, said in the statement. "Our wind projects will help keep energy cost stable over the long-term for customers."

The company expects more than a third of its Iowa energy will be wind-powered by 2020.

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Logan Wroge has been a general assignment reporter for the Wisconsin State Journal since 2015.