SECURITIES AND EXCHANGE COMMISSION

                          Washington, D.C. 20549


********************************************
              In the Matter of
     Alliant Energy Corporation, et al.                    CERTIFICATE
                                                           PURSUANT TO
              File No. 70-10249                               RULE 24

(Public Utility Holding Company Act of 1935)
*********************************************

     This Certificate of Notification  (the  "Certificate")  is filed by Alliant
Energy Corporation  ("Alliant  Energy"),  a registered holding company under the
Public  Utility  Holding  Company Act of 1935,  as amended (the "Act"),  and its
wholly-owned  subsidiary,  Alliant  Energy  Resources,  Inc.  ("Resources"),  in
connection    with    the    transactions    proposed    in   the    Form    U-1
Application-Declaration (the "Application-Declaration"),  as amended, of Alliant
Energy and Resources  (collectively,  the  "Applicants")  in File No.  70-10249.
These  transactions  were  authorized  by order of the  Securities  and Exchange
Commission (the "Commission") dated December 28, 2004 (the "Order").

This Certificate is for the period covering January 1, 2005 -
March 31, 2005 (hereinafter referred to as the "period").

The Applicants hereby certify the matters set forth below
pursuant to Rule 24 of the rules under the Act:

      1.  The sales of any common stock or preferred securities by
      Alliant Energy and the purchase price per share and the
      market price per share at the date of the agreement of sale.

      ANSWER:

      See attached Exhibit A


      2.  The total number of shares of Alliant Energy common
      stock issued or issuable under options granted during the
      quarter under employment benefit plans and dividend
      reinvestment plans including any employee benefit plans or
      dividend reinvestment plans later adopted.

      ANSWER:
 
      See attached Exhibit B
 




      3.  If Common Stock has been transferred to a seller of
      securities of a company being acquired, the number of shares
      so issued, the value per share and whether the shares are
      restricted to the acquirer.

      ANSWER:

      None


      4.  The amount and terms of any Preferred Stock, Preferred
      Securities, and Long-term Debt issued by Alliant Energy or
      IP&L, directly or indirectly through a Financing Subsidiary,
      during the quarter, and the amount and terms of any
      Long-term Debt issued by WRP during the quarter.

      ANSWER:

      None


      5.  The maximum amount of Short-term Debt of Alliant Energy,
      IP&L and WRP outstanding during the quarter and the
      effective cost or range of effective costs for such
      Short-term Debt during the quarter.

      ANSWER:

      The maximum amount of Short-term Debt of Alliant Energy
      outstanding during the quarter was $0.

      The maximum amount of Short-term Debt of IP&L outstanding during
      the quarter was $39 million.  The range of effective costs
      during the quarter was 2.27 to 2.92%.

      The maximum amount of Short-term Debt of WRP outstanding during
      the quarter was $300,000.  The effective cost during the quarter
      was 3.09%.


      6.  The amount of any Alliant Energy Guarantee or
      Non-Utility Subsidiary Guarantee issued during the quarter,
      and the company on whose behalf such guarantee was issued.

      ANSWER:

      See attached Exhibit C

      7.  The notional amount and principal terms of any Interest
      Rate Hedges or Anticipatory Hedges entered into during the
      quarter and the identity of the parties to such instruments.

      ANSWER:

      None






      8.  The amount and terms of any intercompany loan made to a
      less than wholly-owned Non-Utility Subsidiary at interest
      rates and maturities designed to provide a return to the
      lending company of not less than its effective cost of
      capital.

      ANSWER:

      None



      9.  The name, parent company and amount invested in any
      Intermediate Subsidiary during the quarter.

      ANSWER:

      See attached Exhibit D


      10.  With respect to each Financing Subsidiary that has been
      formed during the quarter, a representation that the
      financial statements of the parent of such Financing
      Subsidiary shall account for the Financing Subsidiary in
      accordance with generally accepted accounting principles an
      further, with respect to each such entity, (i) the name of
      the Financing Subsidiary, (ii) the amount invested by the
      parent in such Financing Subsidiary, and (iii) the amount
      and terms of any securities issued by any Financing
      Subsidiary during the reporting period which shall also
      separately show the outstanding balance of all securities
      issued by such Financing Subsidiaries during the
      Authorization Period.

      ANSWER:

      Alliant Energy Corporation did not form any financing
      subsidiaries during the period from January 1, 2005 through
      March 31, 2005.


      11.  If any Financing Subsidiaries are "Variable Interest
      Entities" ("VIEs"), as that term is used in FASB
      Interpretation 46R, "Consolidation of Variable Interest
      Entities", a description of any financing transactions
      conducted during the reporting period that were used to fund
      such VIEs, and, if any financing proceeds are used for VIEs,
      a description of the accounting for such transaction under
      the FASB Interpretation 46R.

      ANSWER:

      None






      12.  The amount and a description of any Energy Assets
      acquired during the quarter.

      ANSWER:

      Alliant Energy did not acquire any "energy assets" during
      the period from January 1, 2005 through March 31, 2005.


      13.  A list of U-6B-2 forms filed with the Commission during
      the quarter, including the name of filing entity and the
      date of the filing.

      ANSWER:

      Alliant Energy Corporate Services, Inc. filed a U-6B-2 on
      February 15, 2005.
      Wisconsin Power and Light Company, Inc. filed a U-6B-2 on
      February 8, 2005.


      14.  Consolidated balance sheets as of the end of the
      quarter and separate balance sheets as of the end of the
      quarter for each company, including Alliant Energy, that has
      engaged in jurisdictional financing transactions authorized
      in this proceeding during the quarter.

      ANSWER:

      Incorporated by reference to Alliant Energy's Form 10-Q for
      the quarter ended March 31, 2005.


      15.  A computation in accordance with rule 53(a) setting
      forth Alliant Energy's aggregate investment in all EWGs
      and FUCOs, its "consolidated retained earnings" and a
      calculation of the amount remaining under the Requested
      EWG/FUCO Investment Authority.
 
      ANSWER:

      See attached  Exhibit E


      16.  A chart showing Alliant Energy's aggregate investment
      in each EWG or FUCO compared to the EWG/FUCO Investment
      Authority.  The chart should also identify any new EWG or
      FUCO, compared to the Requested EWG/FUCO Investment
      Authority, in which Alliant Energy has invested or committed
      to invest during the preceding quarter.

      ANSWER:

      See attached  Exhibit E





      17.  The consolidated capitalization ratio of Alliant
      Energy, with consolidated debt to include all short-term
      debt and all other system debt, both recourse and
      nonrecourse, including debt of EWGs and FUCOs.

      ANSWER:

      See attached Exhibit F


      18.  The market-to-book ratio of Alliant Energy's common stock.

      ANSWER:
 
      See attached Exhibit G


      19.  Analysis of the growth in consolidated retained
      earnings that segregates total earnings growth of EWGs and
      FUCOs from that attributable to other subsidiaries of
      Alliant Energy.

      ANSWER:

      See attached Exhibit H


      20.  A statement of revenues and net income for each EWG and
      FUCO for the twelve months ending as of the end of that
      quarter.

      ANSWER:

      See attached  Exhibit I













                                S I G N A T U R E

     Pursuant to the  requirements  of the Public Utility Holding Company Act of
1935, as amended, the undersigned companies have duly caused this Certificate to
be signed on their behalf by the undersigned thereunto duly authorized.



                               ALLIANT ENERGY CORPORATION

 

                               By:  /s/Thomas L. Hanson
                                    ------------------------
                                    Name:   Thomas L. Hanson
                                    Title:  Vice President and Treasurer


May 27, 2005







Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit A
Report Period:  Jaunuary 1, 2005 - March 31, 2005

Item 1: 
The sales of any common  stock or preferred  securities  by Alliant Energy and 
the  purchase  price per share and the market  price per share at the
date of the agreement of sale.


------------------------------------
       Long-term Equity
       Incentive Plan
------------------------------------
    Date        Exercised    Price
                 Options
------------------------------------
  1/31/2005       49,895     $16.820
------------------------------------
  2/1/2005        4,906      $16.820
------------------------------------
  2/2/2005        3,016      $16.820
------------------------------------
  2/3/2005        8,728      $16.820
------------------------------------
  2/4/2005        7,958      $16.820
------------------------------------
  2/4/2005        1,790      $16.820
------------------------------------
  2/7/2005        3,117      $16.820
------------------------------------
  2/9/2005        1,900      $16.820
------------------------------------
  2/10/2005       3,975      $16.820
------------------------------------
  2/11/2005       5,389      $16.820
------------------------------------
  2/15/2005       4,855      $16.820
------------------------------------
  2/16/2005       10,367     $24.900
------------------------------------
  2/16/2005       17,850     $16.820
------------------------------------

Total            123,746





Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit B
Report Period:  Jaunuary 1, 2005 - March 31, 2005

Item 2: 
The total number of shares of Alliant Energy common stock issued or
issuable under options granted during the quarter under employment benefit plans
and dividend reinvestment plans including any employee benefit plans or dividend
reinvestment plans later adopted.


------------------------------------------------------------------
                                    Original
                                      Issue
              ----------------------------------------------------
               Shareowner               Long-term Equity
    Date      Direct Plan     401(k)       Incentive        Total
                                            Plan
------------------------------------------------------------------
  1/3/2005                                 74,723           74,723
------------------------------------------------------------------
  1/18/2005      28,016                                     28,016
------------------------------------------------------------------
  1/31/2005                                48,850           48,850
------------------------------------------------------------------
  2/15/2005                   51,585                        51,585
------------------------------------------------------------------
  2/15/2005     118,524                                    118,524
------------------------------------------------------------------
  2/24/2005                               (4,234)          (4,234)
------------------------------------------------------------------
  3/15/2005      13,792                                     13,792
------------------------------------------------------------------
    TOTAL       160,332       51,585      119,339          331,256
------------------------------------------------------------------





Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit C
Report Period:  January 1, 2005 - March 31, 2005


Item  6:  
The  amount  of  any  Alliant  Energy  Guarantee  or  Non-Utility
Subsidiary  Guarantee issued during the quarter, and the company on whose behalf
such guarantee was issued.





                                                                                                           
Guarantor                   On Behalf Of               Purpose             Name of             Date of        Date of        Amount
                                                                       Guaranteed Party   Issue/Amendment   Expiration    Guaranteed
------------------------  --------------------------   -------------   -----------------  ----------------  -----------   ----------
Alliant Energy Resources  Williams Bulk Transfer,Inc.  Coal purchases   COALSALES, Inc.       2/8/2005       12/31/2007     $250,000
                     





Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit C - (continued)
Report Period:  Jaunuary 1, 2005 - March 31, 2005


Item  6:  
The  amount  of  any  Alliant  Energy  Guarantee  or  Non-Utility
Subsidiary  Guarantee issued during the quarter, and the company on whose behalf
such guarantee was issued.





                                                                                                             

                                                                               Name of                                     Amount
Guarantor      On Behalf Of                         Purpose                Guaranteed Party             Period           Guaranteed
------------------------------------------------------------------------------------------------------------------------------------
Bonds:

Alliant Energy    IPL/AECS                 Worker's Compensation Bond    State of Minnesota     1/1/2005-1/1/2006      $     380,000
                                                                                                            
Alliant Energy    RMT                      Right of Way Bond             City of Waco, TX       2/18/2005-2/18/2006    $       4,000

Alliant Energy    Cogenex                  Performance/Payment Bond      New York State DOC     2/11/2005-2/11/2006    $   1,988,356
                                                                         Ossining                                  

Alliant Energy    Alliant Energy EPC LLC   Tax Bond                      State of Nebraska      3/2/2005-3/2/2006      $      33,900

Alliant Energy RMT                         Contractors Bond              State of Oregon        3/27/2005-3/27/200     $      15,000





                                      



Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit D
Report Period:  Jaunuary 1, 2005 - March 31, 2005


Item 9: 
The name,  parent company and amount  invested in any  intermediate
subsidiary or financing  subsidiary  during the quarter and the amount and terms
of any securities issued by those subsidiaries during the quarter.



Alliant Energy Corporation formed the following  intermediate  subsidiaries
during the period from January 1, 2005 through March 31, 2005. The  intermediate
subsidiary is designated with an asterisk while its parent company is designated
as such.  The  amounts in  parenthesis  represent  the amount  (in  millions  of
dollars) of investment in that intermediate subsidiary.

Alliant Energy Corporation
  Alliant Energy Resources, Inc.
    Alliant Energy International, Inc.
      LDM Utility Co., S.A. de C.V. (Parent)
        Laguna del Mar RSC, S.A. de C.V.* - ($-)
          Administradora Laguna del Mar, S.A.de C.V.* - ($-)
          Laguna del Mar LLC* - ($-)
        LDM Electric Supply Co., S.A. de C.V.* - ($-)




                                   


Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit E
Report Period:  Jaunuary 1, 2005 - March 31, 2005

Item 15: 
A computation in accordance  with rule 53(a) setting forth Alliant
Energy's  "aggregate  investment"  in all  EWGs  and  FUCOs,  its  "consolidated
retained  earnings" and a calculation of the amount remaining under the EWG/FUCO
Investment Authority.


Item 16: 
A chart showing Alliant Energy's aggregate  investment in each EWG
or FUCO  compared to the EWG/FUCO  Investment  Authority.  The chart should also
identify  any new EWG or FUCO,  compared to the  Requested  EWG/FUCO  Investment
Authority,  in which  Alliant  Energy has invested or committed to invest during
the preceding quarter.

March 31, 2005        


 

                                                                                                 
   
                                     
                                                                                                 
                                                                                                  Aggregate
                                                                 Investments     Commitments      Investment
                                                                 ---------------------------------------------
                                                                             (dollars in millions)
 
Alliant Energy Operaciones de Mexico, S. de R.L. de C.V.         $     -        $      -         $     -
Alliant Energy Servicios de Mexico, S. de R.L. de C.V.                 -               -               -
Anhui New Energy Heat & Power Co. Ltd.                               12.3              -              12.3
Catleo Energia S.A.                                                    -               -               -      
Companhia de Electricidade de Nova Friburgo S.A.                       -               -               -               
Companhia Energetica da Borborema S.A.                                 -               -               -
Companhia Forca e Luz Cataguazes-Leopoldina S.A.                      1.0              -               1.0  
Empresa Energetica de Sergipe S.A.                                    0.2              -               0.2
Hebei Wuan Peak Heat and Power Co. Ltd.                               7.7              -               7.7
Henan Anfeng Electric Power Co. Ltd.                                  9.0              -               9.0 
Henan Yongfeng Electric Power Co. Ltd.                               11.0              -              11.0 
Infratil Ltd.                                                        15.0              -              15.0  
Jiaxing JIES Power & Heat Co. Ltd.                                   13.4              -              13.4 
LDM Utility Co., S.A. de C.V.                                        40.5              -              40.5 
Shijiazhuang Chengfeng Cogeneration Co. Ltd.                         15.3              -              15.3
Sociedade Anonima de Eletrificacao da Paraiba S.A.                   90.2              -              90.2
Tai An Hua Feng Peak Heat and Power Co. Ltd.                          6.3              -               6.3
Tai An Xin Wen Peak Heat and Power Co. Ltd.                            -               -               -  
Tangshan Peak Heat & Power Co. Ltd.                                  48.5              -              48.5
Tongxiang TIES Heat & Power Co. Ltd.                                 10.4              -              10.4 
TrustPower Ltd.                                                      44.1              -              44.1 
Usina Termeletrica de Juiz De Fora S.A.                              13.9              -              13.9 
Zouping Peak CHP Co. Ltd.                                            15.9              -              15.9              
                                                                 ----------------------------------------------
  Aggregate Investments in Foreign Utility Companies (FUCOs)        354.7              -             354.7                        
                                                                 ----------------------------------------------

Alliant Energy Neenah, LLC                                           56.0              -              56.0     
Sheboygan Power, LLC                                                125.2           10.9             136.1     
Guarantee of the debt security of a 6 Mw low Btu gas electric                               
generating facility in Cedar Rapids, Iowa                              -             4.1               4.1
                                                                 ----------------------------------------------    
 Aggregate Investments in Electric Wholesale Generators (EWGs)      181.2           15.0             196.2                         
                                                                 ----------------------------------------------
  Total Aggregate Investments in EWGs and FUCOs                     535.9           15.0             550.9        
                                                                 ----------------------------------------------
   

                                                                                Balance at             Average
                                                                              end of quarter           balance
                                                                            ----------------------------------- 
Alliant Energy's consolidated retained earnings at June 30, 2004                   805.9 
Alliant Energy's consolidated retained earnings at September 30, 2004              859.5
Alliant Energy's consolidated retained earnings at December 31, 2004               871.9  
Alliant Energy's consolidated retained earnings at March 31, 2005                  843.9  
                                                                            --------------
Alliant Energy's "consolidated retained earnings" at March 31, 2005                                      845.3 
(average of ending balance of four previous quarters)                                               ----------- 
                                                                                           
Amount remaining under the Requested EWG/FUCO Investment Authority.                                 $    294.4    
                                                                                                    ===========


                                  



Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit F
Report Period:  Jaunuary 1, 2005 - March 31, 2005


Item 17: 
The  consolidated  capitalization  ratio of Alliant  Energy,  with
consolidated debt to include all short-term debt and all other system debt, both
recourse and nonrecourse, including debt of EWGs and FUCOs.


Alliant Energy Corporation Consolidated Statement of Capitalization
March 31, 2005
(amounts in millions of dollars)
                                                      Amounts         Percentage
                                                      --------------------------

Common equity                                         $   2,539.9         48.79%
Cumulative preferred stock                                  243.8          4.68%
Consolidated debt (1)                                     2,422.2         46.53%
                                                      --------------------------
                                                      $   5,205.9        100.00%
                                                      ==========================

(1)
Long-term debt, net (excluding current portion)       $   2,204.5
Current maturities                                          102.8
Variable rate demand bonds                                   39.1
Commercial paper                                             36.0
Other short-term borrowings                                  39.8
                                                      ------------
                                                      $   2,422.2
                                                      ============

                                     



Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit G
Report Period:  Jaunuary 1, 2005 - March 31, 2005


Item 18:
The market-to-book ratio of Alliant Energy's common stock.



Market value per share at March 31, 2005                          $        26.78
Common equity at March 31, 2005 (in millions)                     $      2,539.9
Total shares outstanding at March 31, 2005                           116,196,818
Book value per share at March 31, 2005                            $        21.86
Market-to-book ratio of Alliant Energy's common stock                    122.51%
                                                                 ===============

                                      



Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit H
Report Period:  Jaunuary 1, 2005 - March 31, 2005


Item 19:  
Analysis of the growth in  consolidated  retained  earnings  that
segregates  total earnings  growth of EWGs and FUCOs from that  attributable  to
other subsidiaries of Alliant Energy.

Alliant Energy Corporation
Statement of Retained Earnings
For the Three Months Ended March 31, 2005
(amounts in millions of dollars)

Beginning balance (December 31, 2004)                           $   871.9
Net income/(loss):
  From EWGs and FUCOs (*)                          (9.6)
  Other                                             12.0
                                          --------------
     Total net income/(loss)                                          2.4
Common stock dividends                                             (30.4)
                                                               ----------
Ending balance (March 31, 2005)                                 $   843.9
                                                               ==========

(*)Amount does not include the allocation of interest,tax or corporate expenses.


                                    


Alliant Energy Corporation
Certificate Pursuant to Rule 24
Exhibit I
Report Period:  Jaunuary 1, 2005 - March 31, 2005


Item 20: 
A statement  of revenues  and net income for each EWG and FUCO for
the twelve months ending as of the end of that quarter.







                                                                                               
                                                                    For the twelve months ended March 31, 2005
                                                             ----------------------------------------------------
                                                                  
                                                                     Revenues                   Net Income/(Loss)
                                                             -----------------------       -----------------------
                                                                             (dollars in millions)
Alliant Energy Neenah, LLC                                   $         14.6                  $       1.6
Alliant Energy Operaciones de Mexico, S. de R.L. de C.V.                0.6                         (0.3)
Alliant Energy Servicios de Mexico, S. de R.L. de C.V.                  0.5                          0.0
Anhui New Energy Heat & Power Co. Ltd.                                 26.2                          1.0
Catleo Energia S.A.                                                    15.6                         10.3
Companhia de Electricidade de Nova Friburgo S.A.                       24.0                          2.6
Companhia Energetica da Borborema S.A.                                 29.7                          3.9
Companhia Forca e Luz Cataguazes-Leopoldina S.A.                       88.2                         (4.2)
Empresa Energetica de Sergipe S.A.                                    121.6                          6.0
Hebei Wuan Peak Heat and Power Co. Ltd.                                 5.8                         (2.2)
Henan Anfeng Electric Power Co. Ltd.                                   11.1                          0.2
Henan Yongfeng Electric Power Co. Ltd.                                 11.0                          0.4
Infratil Ltd. (*)                                                     111.1                         32.9
Jiaxing JIES Power & Heat Co. Ltd.                                     27.8                          0.5
LDM Utility Co., S.A. de C.V.                                           0.2                         (2.0)
Sheboygan Power, LLC.                                                     -                         (0.3)
Shijiazhuang Chengfeng Cogeneration Co. Ltd.                           12.7                          0.5
Sociedade Anonima de Eletrificacao da Paraiba S.A.                    151.9                          8.4
Tai An Hua Feng Peak Heat and Power Co. Ltd.                            9.4                          2.9
Tai An Xin Wen Peak Heat and Power Co. Ltd.                             7.1                          0.7
Tangshan Peak Heat and Power Co. Ltd.                                  29.2                          5.3
Tongxiang TIES Heat & Power Co. Ltd.                                   13.2                          0.5
TrustPower Ltd. (*)                                                   388.7                         47.2
Usina Termeletrica de Juiz De Fora S.A.                                33.6                          7.8
Zouping Peak CHP Co. Ltd.                                              21.2                          1.3




(*)The most recently available information for Alliant Energy's FUCOs in 
New Zealand is the twelve months ended December 31, 2004.