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:                     070-9317
   FILM NUMBER:

   BUSINESS ADDRESS:
   STREET 1:                            222 WEST WASHINGTON AVENUE
   CITY:                                MADISON
   STATE:                               WI
   ZIP:                                 53703
   BUSINESS PHONE:                      608-252-3311

   MAILING ADDRESS
   STREET 1:                            P. O. BOX 192
   CITY:                                MADISON
   STATE:                               WI
   ZIP:                                 53701-0192







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


PUBLIC UTILITY HOLDING COMPANY ACT OF 1935
File No. 70-9317

REPORT PERIOD
October 1, 2001 through December 31, 2001

In the Matter of

ALLIANT ENERGY CORPORATION, ET AL

     ALLIANT ENERGY CORPORATION ("AEC") hereby certifies on behalf of itself and
IES Utilities  Inc.  ("IESU"),  Interstate  Power Company  ("IPC"),  and Alliant
Energy Corporate Services, Inc. ("Services") that during the period from October
1, 2001 through December 31, 2001 (the "Reporting Period"):

     1.   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

  IESU             60,136,564             0.00         60,136,564       150,000,000
  IPC              40,405,615             0.00         40,405,615       100,000,000
  WP&L     (*)    101,351,392             0.00        101,351,392                NA
  SERVICES (*)     69,987,795             0.00         69,987,795                NA


     (*) All borrowings by WP&L and Services from the Utility Money Pool are
     exempt under Rule 52 and are shown here for information purposes only.

     2.   During the Reporting  Period,  the weighted  average interest rate for
          borrowings through the Utility Money Pool was 2.67%.


     3.   During the period  October 1, 2001  through  November  30,  2001,  the
          maximum amount of short-term  borrowings by AEC was  $284,617,000  and
          the weighted  average  interest rate was 2.90%.  The maximum amount of
          loans by AEC to the Utility Money Pool was $174,011,850.

     4.   During the period  December 1, 2001 through  December  31,  2001,  AEC
          relied upon the exemption afforded by Section 6(b) of the Act to issue
          short-term  debt.  AEC is reporting  such activity  separately on Form
          U-6B-2.


     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  70-9317,  and in
accordance  with the terms and  conditions  of the SEC's orders  dated  December
18,1998 and December 15, 2000, permitting said Application-Declaration to become
effective.




    DATED:  February 11, 2002

                         ALLIANT ENERGY CORPORATION
                         INTERSTATE POWER AND LIGHT COMPANY (As successor
                         to IES Utilities Inc. and Interstate Power Company)
                         WISCONSIN POWER AND LIGHT COMPANY
                         ALLIANT ENERGY CORPORATE SERVICES INC.




                         BY: ____________________________________
                                Edward M. Gleason
                                Vice President, Treasurer
                                and Corporate Secretary