Alliant Energy Requests Proposals for Sale of Industrial Energy Applications, Inc.

MADISON, Wis., June 18 /PRNewswire-FirstCall/ -- Alliant Energy Corporation (NYSE: LNT) announced today that Alliant Energy Resources, LLC ("AER") is seeking proposals for the sale of Industrial Energy Applications, Inc. (IEA).  IEA is a wholly-owned subsidiary of AER that provides facilities-based energy services to businesses in the Midwest.  IEA currently owns and operates 59 natural gas and diesel fueled generators located in Iowa and South Dakota (aggregate installed capacity of approximately 80 megawatts) which provide reliable power to its customers during unexpected or prolonged power outages.  IEA also owns and operates a steam production facility utilized by a dairy cooperative located in Wisconsin.

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AER has asked for proposals to be received by 2:00 pm EDT on July 14, 2010.  

Additional information regarding IEA is available at www.alliantenergy.com/Non-Utility/IndustrialEnergyApplications.

Alliant Energy is an energy-services provider with subsidiaries serving approximately 1 million electric and over 412,000 natural gas customers. Providing its customers in the Midwest with regulated electric and natural gas service is the company's primary focus. Alliant Energy's utility subsidiaries are Interstate Power and Light and Wisconsin Power and Light companies.  Alliant Energy, headquartered in Madison, Wis., is a Fortune 1000 company traded on the New York Stock Exchange under the symbol LNT. For more information, visit the company's Web site at www.alliantenergy.com.

ANR119-06

SOURCE Alliant Energy Corporation