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/A
 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
April 1, 2003 through June 30, 2003

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 April 1, 2003 through June 30, 2003 (the "Reporting Period"):


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


                                                                 

                     April              May                June               Quarter
                   ----------------------------------------------------------------------------
Begin Balance      $    35,000,000     $   190,000,000     $    77,000,000     $    35,000,000
CP Issued          $ 3,468,000,000     $ 3,272,000,000     $ 1,772,000,000     $ 8,512,000,000
CP Matured         $ 3,313,000,000     $ 3,385,000,000     $ 1,763,000,000     $ 8,461,000,000
Ending Balance     $   190,000,000     $    77,000,000     $    86,000,000     $    86,000,000



1(b). The weighted average interest rate for the period for all commercial paper
was as follows:

                     

        April           2.000%
        May             2.000%
        June            1.944%
        Quarter         1.991%



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

                                                                     
                     April              May               June                Quarter
                   -------------------------------------------------------------------------
Begin Balance     $    235,000,000    $   83,000,000     $        -        $    235,000,000
CP Issued         $  1,434,000,000    $  617,000,000     $        -        $  2,051,000,000
CP Matured        $ (1,586,000,000)   $ (700,000,000)    $        -        $ (2,286,000,000)
Ending Balance    $     83,000,000    $            -     $        -        $              -




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

                     
        April           4.019%
        May             4.192%
        June            N/A
        Quarter         4.040%



2(a). Interstate Power and Light Company issued commercial paper as follows:

                                                                  
                     April              May                March              Quarter
                   -------------------------------------------------------------------------
Begin Balance      $  75,500,000      $ 109,000,000      $ 120,000,000      $    75,500,000
CP Issued          $ 346,500,000      $ 315,000,000      $ 373,500,000      $ 1,035,000,000
CP Matured         $ 313,000,000      $ 304,000,000      $ 337,600,000      $   954,600,000
Ending Balance     $ 109,000,000      $ 120,000,000      $ 155,900,000      $   155,900,000




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

                     
        April           1.434%
        May             1.427%
        June            1.370%
        Quarter         1.410%


3(a). Interstate Power and Light Company borrowed from Bank as follows:

                                                                  
                     April              May                March              Quarter
                   ---------------------------------------------------------------------------
Begin Balance      $           -      $           -      $  11,000,000      $            -
CP Issued          $  19,000,000      $  41,000,000      $           -      $   60,000,000
CP Matured         $  19,000,000      $  30,000,000      $  11,000,000      $   60,000,000
Ending Balance     $           -      $  11,000,000      $           -      $            -





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

                     
        April           4.192%
        May             4.192%
        June            4.192%
        Quarter         4.211%



4(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 (*)                    0     155,900,000    155,900,000    250,000,000
WP&L     (**)              0      84,500,000     84,500,000            NA
SERVICES (***)   112,479,745               0    112,479,745            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.


5.  During  the  Reporting  Period,  the  weighted  average  interest  rate  for
borrowings through the Money Pool was 2.341%.

6. 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             $112,479,745     $180,520,255     $ 293,000,000     $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:  August 4, 2003

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

                               BY:  ALLIANT ENERGY CORPORATION



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





                BEFORE THE MINNESOTA PUBLIC UTILITIES COMMISSION

               LeRoy Koppendrayer                         Chair
               Gregory Scott                       Commissioner
               Marshall Johnson                    Commissioner
               Phyllis Reha                        Commissioner


Steven F. Price                               SERVICE DATE:   AUG - 7 2003
Assistant Treasurer
Interstate Power and Light Company            DOCKET NO.  E,G-001/S-03-187
P.O. Box 77007
Madison, WI  53707-1007


In the Matter of a Request by Interstate Power and Light Company for Approval of
an Amendment to its Capital  Structure for Calendar Year 2003,  Ending March 31,
2004

The  above  entitled  matter  has  been  considered  by the  Commission  and the
following disposition made:

 The Commission's March 28, 2003 Order is revised as follows:

      Approved Interstate's requested March 31, 2004 capital structure;

      Approved a-/+ 10 percent range around Interstate's Post-Equity Infusion
      Average common equity, preferred equity and long-term debt; and

      Approved Interstate's total capitalization contingency, not to exceed 5
      percent ver its revised projected March 31, 2004 total capitalization,
      including $250 million of short-term debt (i.e. $2,446.3 million).

This decision is issued by the Commission's consent calendar subcommittee, under
a delegation  of authority  granted  under Minn.  State.  216A.03,  subd. 8 (a).
Unless a party,  a  participant,  or a  Commissioner  files an objection to this
decision  within ten days of receiving  it, it will become the Order of the full
Commission under Minn. Stat. 216A.03, subd. 8 (b).

The Commission agrees with and adopts the  recommendations  of the Department of
Commerce which are attached and hereby incorporated in the Order.

                                    BY ORDER OF THE COMMISSION

                                      /s/ Burl W Haar
                                    ---------------------------------
                                    Burl W. Haar
                                    Executive Secretary

(S E A L)

     This document can be made  available in alternative  formats  (i.e.,  large
print or audio tape) by calling (651) 297-4596 (voice), (651) 297-1200 (TTY), or
1-800-627-3529 (TTY relay service).



                        Minnesota Department of Commerce
                          85 7th Place East, Suite 500
                         St. Paul, Minnesota 55101-2198
                 651.296.4026 fax 651.297.1959 tty 651.297.3067


August 1, 2003


Burl W. Haar
Executive Secretary
Minnesota Public Utilities Commission
121 7th Place East, Suite 350
St. Paul, Minnesota 55101-2147

RE:      Comments of the Minnesota Department of Commerce
         Docket No. E,G001/S-03-187

Dear Dr. Haar:

Attached are the comments of the Energy  Division of the  Department of Commerce
in the following matter:

     A petition of the  Interstate  Power and Light  Company for  approval of an
amendment  to its capital  structure  for calendar  year 2003,  ending March 31,
2004.

The petition was filed on July 22, 2003 by:

         Steven F. Price
         Assistant Treasurer
         Interstate Power and Light Company
         PO Box 77007
         Madison, Wisconsin  53707-1007

The Department recommends approval as modified and is available to answer any
questions the Commission may have.

Sincerely,

/s/ Dale V Lusti
---------------------
DALE V. LUSTI
Financial Analyst

DVL/jl
Attachment

Market Assurance:      1.800.657.3602     Licensing:  1.800.657.3978
Energy Information:    1.800.657.3710     Unclaimed Property:  1.800.925.5668
 www.commerce.state.mn.us                 An Equal Opportunity Employer




                Before The Minnesota Public Utilities Commission

                                 Comments Of The

                        Minnesota Department Of Commerce

                           Docket No. E,G001/S-03-187

I.       BACKGROUND

On February 10, 2003, Interstate Power and Light Company (Interstate, IPL or the
Company)  petitioned the Minnesota Public  Utilities  Commission for approval of
its March 31, 2004 proposed capital  structure.  More  specifically,  IPL sought
approval of:

o    Interstate's requested March 31, 2004 capital structure with:

       -    Common equity of 45.3 percent,
       -    Preferred equity of 7.5 percent, and
       -    Long-term Debt of 39.0 percent;

o    A contingency  range of -/+25 percent range around  Interstate's  March 31,
     2004 estimated common equity, preferred equity and long term debt;

o    Interstate's  proposed total  capitalization  contingency,  not to exceed 5
     percent over its projected March 31, 2004 total  capitalization,  including
     $250 million of short-term debt (i.e., $2,451.8 million); and

o    Interstate's  proposed  short-term  debt, not to exceed $250 million at any
     time during the fiscal year ending March 31, 2004.

The Department's March 14, 2003 recommendation was as follows:

o    Approve Interstate's requested March 31, 2004 capital structure;

o    Approve  a-/+ 10 percent  range  around  Interstate's  Pre-Equity  Infusion
     Average common equity, preferred equity and long-term debt;



Docket No. E,G001/S-03-187
Analyst assigned:  Dale V. Lusti
Page 2




o    Approve a-/+ 10 percent  range  around  Interstate's  Post-Equity  Infusion
     Average common equity, preferred equity and long-term debt;

o    Approve  Interstate's  total  capitalization  contingency,  not to exceed 5
     percent over its projected March 31, 2004 total  capitalization,  including
     $250 million of short-term debt (i.e., $2,451.8 million);

o    Approve  Interstate's  short-term  debt,  not to exceed $250 million at any
     time during the fiscal year ending March 31, 2004; and

o    Allow the Company not to seek Commission approval before issuing securities
     as long as issuing these securities will not result in a capital  structure
     that is out of compliance with this Order.

On March 28, 2003, the Commission  approved the Department's  recommendation  as
stated above.


II.      SUMMARY OF INTERSTATE'S PROPOSAL

On July 22,  2003,  Interstate  petitioned  the  Commission  for  approval of an
amendment to its March 31, 2004 proposed capital structure,  effective beginning
in August 2003. Due to current market conditions, IPL deems it advisable to move
up its planned $35 million  issuance of preferred  stock from  December  2003 to
August 2003. If the issuance is moved up to August 2003,  the  preferred  equity
ratio in that month would  likely fall outside the allowed  range.  As a result,
IPL is seeking approval of the following new ranges for common equity, preferred
stock and long-term debt:





                                                

                              Post-Equity Infusion

                                                      Revised
                                                  Average August 2003
                                                  Through March 2004
Component                 Proposed Range           Capital Structure
-----------------------------------------------------------------------------
Common Equity             42.0%-  51.4%                  46.7%
Preferred Equity           7.6 -  9.3                     8.5
Long-term Debt            36.8 - 45.0                    40.9


IPL requests that the maximum total  capitalization  and the maximum  short-term
debt limits remain as previously ordered.




Docket No. E,G001/S-03-187
Analyst assigned:  Dale V. Lusti
Page 3


III.     DEPARTMENT ANALYSIS

The Department believes that IPL has requested the revision to allow for the $35
million  issuance of preferred  stock during August 2003 rather than in December
2003 for the following two reasons:

o    First,  IPL's parent  (Alliant)  infused only $119 million of common equity
     into IPL during July 2003 versus the anticipated $150 million identified in
     the initial  petition  which was the basis for the  Commission's  March 28,
     2003 Order; and

o    Second, although IPL has not specifically identified the amount of savings,
     it expects that the interest  rates will have  increased by December  2003,
     thus making the issuance more costly.

After  discussion  with the utility,  the Department  has determined  that IPL's
liquidity would not be detrimentally  affected if the Commission  determines not
to approve IPL's requested revision.                                         ---


The Department  agrees with Interstate that, absent a revision to the Commission
approved capital structure,  the Company would be outside its approved range for
preferred  equity  beginning  in August 2003.  However,  it should be noted that
neither the common  equity nor the  long-term  debt ratios  would be outside the
approved ranges.

Similar to the  Department's  discussion  in its March 14,  2003  Comments,  the
Department  notes that the timing of a single  equity  issuance can have a large
impact  on the debt and  equity  ratios,  resulting  in a  utility  being out of
compliance with its contingency  ranges.  Therefore,  the Department agrees with
Interstate that it is reasonable to modify the capital structure to reflect both
the change in the timing of the  preferred  stock  issuance  as well as the most
recent actual information and currently projected data.

From a regulatory  point of view,  the use of a tightened  contingency  range as
recommended  by the  Department  and approved by the Commission in its Match 28,
2003 Order creates the occasional  need for revisions such as this.  This allows
the Department  and the Commission the  opportunity to be fully aware of changes
as they occur, and how the may affect ratepayers.

As a result, the Department  recommends that the Commission approve Interstate's
proposed  post-equity capital structure for the months August 2003 through March
2004. It should be noted that the month of August 2003, as compared to the month
of July 2003 (as identified in the Commission's March 28, 2003 Order), should be
the first month of the revised  capital  structure in that the  preferred  stock
issuance will occur during the month of August 2003.



Docket No. E,G001/S-03-187
Analyst assigned:  Dale V. Lusti
Page 4



One minor  modification  that the  Department  recommends is that  Interstate be
allowed a maximum  capitalization  contingency  of  $2,446.3  million (5 percent
above its revised  March 31,  2004 total  capitalization  of  $2,329.8  million,
including  $250 million of short-term  debt).  The  Department's  calculation is
based on the revised  capitalization  proposed in the filing rather than the one
previously approved in the March 28, 2003 Order.


IV.      SUMMARY AND RECOMMENDATION

The Department  summarizes its  recommendations to revise the Commission's March
28, 2003 Order as follows:

o    Approve Interstate's requested March 31, 2004 capital structure;

o    Approve  a-/+10  percent  range around  Interstate's  Post-Equity  Infusion
     Average common equity, preferred equity and long-term debt; and

o    Approve  Interstate's  total  capitalization  contingency,  not to exceed 5
     percent  over its revised  projected  March 31, 2004 total  capitalization,
     including $250 million of short- term debt (i.e., $2,446.3 million).




/jl



             RECEIVED                        Interstate Power and Light Co.
                                             An Alliant Energy Company
            AUG - 4 2003                     Corporate Headquarters
      MN PUBLIC UTILITIES COMMISSON          Alliant Tower
                                             200 First Street SE
                                             Box 351
                                             Cedar Rapids, IA  52406-0351

                                             Office: 1.800.822.4348
                                             www.alliantenergy.com


August 1, 2003

Dr. Burl W. Haar
Executive Secretary
State of Minnesota Public Utilities Commission
121 7th Place East, Ste. 350                   Legal Dept. Fax:608/458-4820
St. Paul, MN  55101                            Writer's direct line:608/458-3951

RE:  Interstate  Power and Light Company's  Request to Modify Capital  Structure
     Order Issued on March 28, 2003 in Docket No. E,G001/S-03-187

Dear Dr. Haar:

Interstate Power and Light Company (IPL) agrees with the  recommendations  filed
by the  Department  of  Commerce  (DOC)  in this  matter.  IPL will not file any
further reply and respectfully requests that the Commission approve its Petition
in the manner recommended by the DOC.

IPL  appreciates  the  efforts  and  consideration  of the  DOC  and  Commission
regarding this docket.

Very truly yours,



/s/ Ritchie J. Sturgeon
--------------------------
Ritchie J. Sturgeon
Senior Regulatory Attorney
Enclosures

cc:      Attached service list