FILER:

 COMPANY DATA:
 COMPANY CONFORMED NAME:              ALLIANT ENERGY CORPORATION
 CENTRAL INDEX KEY:
 STANDARD INDUSTRIAL CLASSIFICATION:  ELECTRIC AND OTHER SERVICES COMB. [4931]
 IRS NUMBER:                          391380265
 STATE OF INCORPORATION:              WI
 FISCAL YEAR END:                     12/31

 FILING VALUES:
 FORM TYPE:                           35-CERT
 SEC ACT:
 SEC FILE NUMBER:                     070-10052
 FILM NUMBER:

 BUSINESS ADDRESS:
 STREET 1:                            4902 N Biltmore Lane
 CITY:                                MADISON
 STATE:                               WI
 ZIP:                                 53718
 BUSINESS PHONE:                      608-458-3311

 MAILING ADDRESS
 STREET 1:                            P. O. BOX  77007
 CITY:                                MADISON
 STATE:                               WI
 ZIP:                                 53707





                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington D. C. 20549


PUBLIC UTILITY HOLDING COMPANY ACT OF 1935
File No. 70-10052

REPORT PERIOD
October 1, 2002 through December 31, 2002

In the Matter of

ALLIANT ENERGY CORPORATION, ET AL

     ALLIANT ENERGY  CORPORATION  ("AEC") hereby certifies on behalf of itself ,
Wisconsin Power and Light Company,  Interstate  Power and Light Company ("IPL"),
and Alliant Energy Corporate Services,  Inc.  "Services") that during the period
from October 1, 2002 through December 31, 2002 (the "Reporting Period"):


1(a). Alliant Energy Corporation issued commercial paper as follows:


                                                                     
                      October            November             December           Quarter
                    ----------------------------------------------------------------------------
Beginning Balance    $  76,750,000     $  194,360,000      $    77,232,000      $   76,750,000
Issued               $ 543,500,000     $1,773,500,000      $ 2,514,200,000      $4,827,907,000
Matured              $ 425,890,000     $1,890,628,000      $ 2,455,932,000      $4,769,157,000
Ending Balance       $ 194,360,000     $   77,232,000      $   135,500,000      $  135,500,000



1(b).The weighted  average  interest rate for the period for all short term debt
     was as follows:


                              
                 October         2.199%
                 November        2.012%
                 December        1.917%
                 Quarter         2.0427%


1(c). Alliant Energy Corporation borrowed from Banks as follows:


                                                                    
                      October             November          December             Quarter
                     ---------------------------------------------------------------------------
Beginning Balance    $          0       $   75,000,000     $  445,000,000        $            0
Issued               $ 75,000,000       $  370,000,000     $            0        $  445,000,000
Matured              $          0       $            0     $ (360,000,000)       $ (360,000,000)
Ending Balance       $ 75,000,000       $  445,000,000     $   85,000,000        $   85,000,000


1(d).The weighted  average  interest rate for the period for the bank borrowings
     was as follows:


                              
                 October         4.109%
                 November        2.928%
                 December        2.580%
                 Quarter         3.206%


2(a). Interstate Power and Light Company borrowed from bank as follows:


                                                                    
                      October            November            December            Quarter
                     ---------------------------------------------------------------------------
Beginning Balance    $          0       $ 50,000,000       $ 75,000,000        $          0
Issued               $ 50,000,000       $ 25,000,000       $          0        $ 75,000,000
Matured              $          0       $          0       $ 75,000,000        $ 75,000,000
Ending Balance       $ 50,000,000       $ 75,000,000       $          0        $          0



2(b).Weighted  Average for the interest rate for the period for bank  borrowings
     was as follows:


                                           
                 October         4.841%
                 November        4.129%
                 December        2.552%
                 Quarter         3.8410%


3(a).For each of the  companies  participating  in the Utility Money Pool during
     the Reporting Period, the maximum principal amount of short-term borrowings
     outstanding  from the Utility  Money Pool,  sources  other than the Utility
     Money Pool, and the maximum total short-term borrowings  outstanding during
     the Reporting Period,  and the Securities and Exchange  Commission  ("SEC")
     borrowing limit for each  participant as of the end of the Reporting Period
     were as follows:



                                                      
                                 Maximum
                 Maximum          Other         Maximum
                Money Pool      Short-Term       Total              SEC
Company         Borrowings      Borrowings      Borrowings         Limit
-------------  --------------  -------------- ----------------- ---------------

IPL (*)          56,287,183      75,000,000     75,000,000         250,000,000
WP&L     (**)             0      86,000,000     86,000,000                 NA
SERVICES (***)  127,136,647               0    127,136,647                 NA


     (*) IPL ceased borrowing from the Money Pool as of October 11, 2002.

    (**) All borrowings by WP&L from the Money Pool are exempt under Rule 52(a)
         and are shown here for information purposes only. WPL ceased
         borrowings from the Money Pool as of July 25, 2002.

   (***) Borrowings by Services are exempt under Rule 52(b) and are shown here
         for information purposes only.


4.   During  the  Reporting  Period,  the  weighted  average  interest  rate for
     borrowings through the Money Pool was 2.377%.

5.   The maximum amount of AEC's  short-term  borrowings on behalf of itself and
     the above named participants in the Utility Money Pool during the Reporting
     Period,  and its SEC limit as of the end of the Reporting  Period,  were as
     follows:


                                                      

                Maximum         Maximum         Maximum
                Loans to        Corporate       Short-Term         SEC
                Money Pool      Borrowings      Borrowings         Limit

        AEC    144,305,359      404,094,641     548,400,000     1,000,000,000

________________

Said  transactions  have  been  carried  out in  accordance  with the  terms and
conditions   of,   and  for  the   purpose   represented   in,   the   Form  U-1
Application-Declaration,  as amended,  of AEC, et al, in File  70-10052,  and in
accordance  with the terms and conditions of the SEC's order dated June 21,2002,
permitting said Application-Declaration to become effective.


DATED: February 14, 2003

                                ALLIANT ENERGY CORPORATION
                                INTERSTATE POWER AND LIGHT COMPANY
                                WISCONSIN POWER AND LIGHT COMPANY
                                ALLIANT ENERGY CORPORATE SERVICES INC.

                               BY:  ALLIANT ENERGY CORPORATION



                               BY:   /s/ Thomas L. Hanson
                                   _________________________________
                                   Thomas L. Hanson
                                   Vice President, Treasurer