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Second, communities were promised that by owning the plant, they would be able to collectively control its costs, yielding them low-cost power for decades. However, the cost of wholesale power from Prairie State will exceed projected.
However as of early 2010 the estimated cost had increased to $4. 4 billion, requiring investors to borrow more money and raising the projected cost of electricity to undesirable levels.  Peabody in response capped construction costs at "approximately $4 billion" excluding some costs such as coal development and transmission lines.  In January 2013, with many municipalities adversely impacted by the high prices, the SEC subpoenaed information from Peabody.  In a bid to exit its share of the Prairie State project.
One of the biggest private capital projects in Illinois, Prairie State Energy Campus provides 1,600 megawatts of power & created 2,700 construction jobs.