Alliant Energy Corporation Subsidiaries Contribute $75 Million to Pension and Retirement Plans

MADISON, Wis., Dec. 22  /PRNewswire-FirstCall/ -- Today, three of Alliant Energy Corporation's (NYSE:LNT) top tier subsidiaries accelerated their planned 2010 contributions to pension and retirement plans.  Wisconsin Power and Light Company, Interstate Power and Light Company and Alliant Energy Corporate Services, Inc. contributed $30 million, $35 million and $10 million, respectively.

(Logo: http://www.newscom.com/cgi-bin/prnh/20020405/LNTLOGO)

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.  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/. 

http://www.newscom.com/cgi-bin/prnh/20020405/LNTLOGO

http://photoarchive.ap.org/

DATASOURCE: Alliant Energy Corporation



CONTACT:  Media, Scott Reigstad, [phone], or Investor Relations,

Sue Gille, [phone], both for Alliant Energy Corporation



Web Site:  http://www.alliantenergy.com/ 

Copyright