Alliant Energy Corporation Announces Second Quarter 2009 Earnings Release and Conference...

Alliant Energy Corporation Announces Second Quarter 2009 Earnings Release and
Conference Call

MADISON, Wis., July 30 /PRNewswire-FirstCall/ -- Alliant Energy Corporation
(NYSE: LNT) has scheduled its second quarter 2009 earnings release for
Thursday, August 6th, before the stock market opens. A conference call to
review the first quarter results is scheduled for the same day at 9:00 a.m.
CT.

Alliant Energy will webcast the event live at
www.alliantenergy.com/investorshttp:///. The call is open to the public and
will be hosted by Bill Harvey, Chairman, President and CEO, and Pat Kampling,
Vice President, CFO and Treasurer. Individuals who would like to participate
in the conference call can do so by dialing (888) 221-9591 (United States &
Canada) or (913) 312-1434 (international), passcode 8244179.

A replay of the call will be available through August 13, 2009, at (888)
203-1112 (United States & Canada) or (719) 457-0820 (international). Callers
should reference passcode 8244179. An archive of the webcast will also be
available on the company's website at www.alliantenergy.com/investors.

Alliant Energy Corporation 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 electricity
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 www.alliantenergy.com.

Media Contact: Rob Crain (608) 458-4469
Investor Relations Contact: Jamie Freeman (608) 458-3274

SOURCE Alliant Energy Corporation

Media, Rob Crain, +1-608-458-4469, Investor Relations, Jamie Freeman,
+1-608-458-3274, both of Alliant Energy Corporation