CEDAR RAPIDS, Iowa, July 31, 2013 /PRNewswire/ -- The Board of Directors of Interstate Power and Light Company (IPL) has declared dividends for its preferred stock shareowners of record on August 30, 2013. The dividends, which are payable on September 16, 2013, are as follows:

(Logo: http://photos.prnewswire.com/prnh/20020405/LNTLOGO)

$0.31875 per share on the 5.1% Series D Cumulative Preferred Stock

About Alliant Energy - IPL

Interstate Power and Light Company (IPL), based in Cedar Rapids, Iowa, provides electric service to 525,000 customers and natural gas service to 233,000 customers in more than 700 communities throughout Iowa and southern Minnesota. IPL is committed to providing the energy and exceptional service its customers and communities expect - safely, reliably, and affordably. IPL is a subsidiary of Alliant Energy Corporation. For more information, visit alliantenergy.com or call 1-800-ALLIANT (800-255-4268).

SOURCE Interstate Power and Light Company