Alliant Energy Subsidiary Acquires Iowa Wind Farm

Energy Resource, Feb 6, 2008

ENERGY RESOURCE-6 February 2008-Alliant Energy Subsidiary Acquires Iowa Wind Farm(C)2008 JeraOne - http://www.jeraone.com

Interstate Power and Light Company (IPL), a subsidiary of Alliant Energy Corporation, has acquired a 300 megawatt wind power farm located near Hampton, Iowa, from Iowa Winds.

The wind farm is adjacent to a 200 megawatt wind power farm IPL acquired from Wind Capital Group in November 2007.

The Whispering Willow Wind Farm, which consists of the two recent site acquisitions, has the potential to produce up to 500 megawatts of emissions-free energy if completely developed, the company said in a news release.

IPL currently anticipates developing 200 megawatts of wind power on the site beginning in 2009 and expects the first 200 megawatts to be commercially operable in 2010. IPL added that it will still have the ability to develop up to an additional 300 megawatts of potential wind power on the site. A decision regarding the development of the wind farm's additional 300 megawatts has not yet been made.

Currently, approximately four percent of IPL's electric energy is derived from wind power. Upon completion of Whispering Willow Wind Farm's initial 200 megawatts, IPL expects that approximately 6 percent of its electricity will be produced from renewable energy sources through either purchased power agreements or company-owned generation.

"We are preparing for our customers' and Iowa's energy future," said Kim Zuhlke, vice president of new energy resources for Alliant Energy. "The Whispering Willow Wind Farm aligns squarely with Governor Culver's vision that 25 percent of all the energy produced in Iowa comes from renewable sources by 2025. While the Whispering Willow Wind Farm is a great start, we are committed to maximizing Iowa's wind energy potential. We will continue to seek environmentally friendly alternative sources of energy to complement our baseload generation initiatives."

For more information, visit www.alliantenergy.com.

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