WEC Energy Group announced that the company has agreed to acquire a 90% ownership interest in the Sapphire Sky Wind Energy Center. Located in McLean County, Illinois, the project is being developed by Invenergy — a leading global developer and operator of sustainable energy solutions. The Sapphire Sky site will consist of 64 wind turbines with a combined capacity of 250 megawatts. Commercial operation is expected by the end of 2022. Sapphire Sky will generate renewable energy that will be sold under a long-term power purchase agreement with a Fortune 100 global, high-tech company.  WEC Energy Group's investment is expected to total $412 million for the 90% ownership interest. With this project, the company's Infrastructure segment has planned investments in eight major wind farms totaling more than 1.5 gigawatts of capacity.