Exhibit (99.1)

   Written Statement of the Chairman, President and Chief Executive Officer
                          Pursuant to 18 U.S.C. Section 1350

       Solely for the purposes of complying with 18 U.S.C. Section 1350, I, the
undersigned Chairman, President and Chief Executive Officer of Alliant Energy
Corporation (the "Company"), hereby certify, based on my knowledge, that the
Quarterly Report on Form 10-Q of the Company for the quarter ended June 30,
2002 (the "Report") fully complies with the requirements of Section 13(a) of
the Securities Exchange Act of 1934 and that information contained in the
Report fairly presents, in all material respects, the financial condition and
results of operations of the Company.




/s/  Erroll B. Davis, Jr.
-------------------------
Erroll B. Davis, Jr.
August 9, 2002