SECURITIES AND EXCHANGE COMMISSION
                        Washington D. C. 20549

                              FORM U-6B-2

                      Certificate of Notification

                   WISCONSIN POWER AND LIGHT COMPANY


      This certificate is filed by Wisconsin Power and Light Company
("WPL"). This certificate is notice that WPL, during the period from
April 1, 2005 through June 30, 2005, has issued, renewed or
guaranteed the security or securities described herein, which issue,
renewal or guaranty was exempted from the provisions of Section 6(a)
of the Act and was neither the subject of a declaration or
application on Form U-1 nor included within the exemption provided by
Rule U-48 [Reg. Section 250.48 Paragraph 36,621].

1.     Type of the security - Commercial paper notes issued by WPL.

2.     Issue, renewal or guaranty - New Issues

3.     Principal amount - See Schedule 1

4.     Rate of interest - See Schedule 1

5.     Date of issue, renewal or guaranty - From April 1, 2005 through
       June 30, 2005.

6.     If renewal of security, give date of original issue - Not
       Applicable

7.     Date of maturity of each security - various ranging from 1 day
       to 4 days.

8.     Name of the person to whom each security was issued, renewed or
       guarantied:  Cede & Co.

9.     Collateral given with each security:  None

10.    Consideration received for each security:  See Schedule 1

11.    Application of proceeds of each security:  See Schedule 1

12.    Indicate by a check after the applicable statement below
       whether the issue, renewal or guaranty of each security was
       exempt from the provisions of Section 6(a) because of
       a.  the provisions contained in the first sentence of 6(b),  :
       b.  the provisions contained in the fourth sentence of 6(b),  :
       c.  the provisions contained in any rule of the commission
       other than Rule U-48, :  X



13.    Not Applicable

14.    Not Applicable

15.    Exempt from provisions of 6(a) under Rule 52.


                               WISCONSIN POWER AND LIGHT CO.

Date: August 19, 2005          By:
      ---------------             -------------------------------------------
                                  Thomas L. Hanson
                                  Vice President and
                                  Treasurer



                              Form U-6B-2
                              Schedule 1

                   WISCONSIN POWER AND LIGHT COMPANY

           PERIOD FROM APRIL 1, 2005 THROUGH JUNE 30, 2005.

1.    During the period from April 1, 2005 through June 30, 2005, WPL
      issued commercial paper as follows:

                  April             May           June         Quarter
                ------------------------------------------------------------
Begin Balance    $ 7,000,000   $ 12,000,000    $ 34,000,000   $    7,000,000
CP Issued        $30,000,000   $351,000,000    $687,000,000   $1,068,000,000
CP Matured       $25,000,000   $329,000,000    $675,000,000   $1,029,000,000
Ending Balance   $12,000,000   $34,000,000     $ 46,000,000   $   46,000,000

2.    The weighted average interest rate for the period was as follows:

April           2.9307%
May             3.0521%
June            3.1293%
Quarter         3.0961%