State Regulators Allow New Plant Permitting Process to Move Forward

Nelson Dewey Generating Station will have capacity to burn multiple, renewable resource fuels

MADISON, Wis., Dec. 20 /PRNewswire-FirstCall/ — State regulators have determined the Certificate of Public Convenience and Necessity (CPCN) application of Wisconsin Power and Light Company (WPL), a subsidiary of Alliant Energy Corporation (NYSE:LNT) is “complete,” thereby initiating the construction permitting process. The Public Service Commission of Wisconsin (PSCW), working closely with the Wisconsin Department of Natural Resources, is responsible for conducting a thorough analysis of the project plan. The CPCN permitting process involves months of extensive environmental review, technical assessments, public input and further analysis before a CPCN is issued by the PSCW.

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“This represents another step forward on the path to meeting the future energy needs of Wisconsin,” said Barbara Swan, President of WPL. “It is also our opportunity to showcase our commitment to a greener future through new technology, renewable fuels and our significant investment in wind power.”

The proposed project is a planned expansion of the existing Nelson Dewey facility, located in Cassville, WI — on the shores of the Mississippi River. The circulating fluidized bed system will be unique in the state, for a project of its size, because it will have the flexibility to not only utilize coal as a fuel source, but also renewable resource fuels, such as switchgrass, corn stalks (stover), and wood. The plant is designed to generate 300 megawatts of electricity, or enough to power 300,000 homes. Swan said the flexible fuels capability will allow Alliant Energy to help develop new agricultural and forestry supply markets in the state.

“We have been working with area farmers and foresters to make sure the prices are fair and the markets are sustainable,” said Bill Johnson, Manager-Biofuels Development for Alliant Energy. “It’s very exciting to think we can grow a future energy source right here in Wisconsin.”

WPL has selected Washington Group International to provide engineering, procurement, and construction services for the proposed expansion.

By law, the PSCW has up to 360 days (180 days plus an optional 180 day extension) to make a final ruling on the proposed expansion. Public input is encouraged throughout the process. “This plan addresses our responsibility to provide reliable and affordable electricity, while protecting the environment for us all to enjoy,” said Bill Harvey, Chairman, President and CEO for Alliant Energy. “We look forward to discussing this plan in greater detail as the process unfolds, and encourage people to get involved and have their voices heard.”

Alliant Energy is an energy-services provider with subsidiaries serving approximately 1 million electric and over 400,000 natural gas customers. Providing its customers in the Midwest with regulated electric and natural gas service is the company’s primary focus. Wisconsin Power and Light, the company’s Wisconsin utility subsidiary, serves 453,000 electric and 175,000 natural gas customers. 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 http://www.alliantenergy.com/.

This press release includes forward-looking statements. These forward- looking statements can be identified as such because the statements include words such as “planned,” “designed,” or other words of similar import. Similarly, statements that describe future plans or strategies are also forward-looking statements. Such statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those currently anticipated. Actual results could be affected by such factors as: state regulatory actions or local government actions which revise the project or delay or prevent the new generation construction, including inability to obtain all necessary approvals and permits; current or future litigation, regulatory investigations, proceedings or inquiries that could impede the permitting process or implementation of WPL’s plans; failure of equipment and technology to perform as expected; and economic and political conditions in WPL’s service territory. These factors should be considered when evaluating the forward- looking statements and undue reliance should not be placed on such statements. The forward-looking statements included herein are made as of the date hereof and Alliant Energy and WPL undertake no obligation to update publicly such statements to reflect subsequent events or circumstances.

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Source: Alliant Energy Corporation