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
April 1, 2001 through June 30, 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 April
1, 2001 through June 30, 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             106,885,062          0.00        106,885,062      150,000,000
IPC               67,647,806          0.00         67,647,806      100,000,000
WP&L     (*)      34,848,717          0.00         34,848,717              NA
SERVICES          70,174,303          0.00         70,174,303      100,000,000


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

     2. During the  Reporting  Period,  the weighted  average  interest rate for
borrowings through the Money Pool was 5.98 %.


     3. 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              105,755,543      193,655,457     284,186,000      475,000,000
________________



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


        DATED:  August 8, 2001

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

                                     BY:  ALLIANT ENERGY CORPORATION



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