SECURITIES & EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             ----------------------

                                  SCHEDULE 13G*
                                 (Rule 13d-102)

                                Amendment No. 1*


             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
                              PURSUANT TO 13d-2(b)

                          Mueller Water Products, Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    624758108
                                 (CUSIP Number)

                                December 31, 2006
             (Date of event which requires filing of this statement)


     Check the appropriate box to designate the rule pursuant to which this
Schedule 13G is filed:
     [ ]  Rule 13d-1(b)
     [x]  Rule 13d-1(c)
     [ ]  Rule 13d-1(d)





                           (Page 1 of 11 Pages)
----------------
     *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

     The information required in the remainder of this cover page shall not be
deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act
of 1934 ("Act") or otherwise subject to the liabilities of that section of the
Act but shall be subject to all other provisions of the Act (however, see the
Notes).






CUSIP No. 624758108                 13G                   Page 2 of 11 Pages

----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                                            Owl Creek I, L.P.
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [ ]
                                                                  (b)  [x]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                             -0-
SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                             17,700
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                             -0-
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                             17,700
-----------------------------------------------------------------------------
     (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED
             BY EACH REPORTING PERSON
                                             17,700
-----------------------------------------------------------------------------
     (10)    CHECK BOX IF THE AGGREGATE AMOUNT
             IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)    PERCENT OF CLASS REPRESENTED
             BY AMOUNT IN ROW (9)
                                             0.1%
-----------------------------------------------------------------------------
     (12)    TYPE OF REPORTING PERSON **
                                             PN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 624758108                 13G                   Page 3 of 11 Pages

----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                                           Owl Creek II, L.P.
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [ ]
                                                                  (b)  [x]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                             -0-
SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                             147,800
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                             -0-
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                             147,800
-----------------------------------------------------------------------------
     (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED
             BY EACH REPORTING PERSON
                                             147,800
-----------------------------------------------------------------------------
     (10)    CHECK BOX IF THE AGGREGATE AMOUNT
             IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)    PERCENT OF CLASS REPRESENTED
             BY AMOUNT IN ROW (9)
                                             0.5%
-----------------------------------------------------------------------------
     (12)    TYPE OF REPORTING PERSON **
                                             PN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 624758108                 13G                   Page 4 of 11 Pages

----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                                      Owl Creek Advisors, LLC
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [ ]
                                                                  (b)  [x]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                             -0-
SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                             165,500
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                             -0-
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                             165,500
-----------------------------------------------------------------------------
     (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED
             BY EACH REPORTING PERSON
                                             165,500
-----------------------------------------------------------------------------
     (10)    CHECK BOX IF THE AGGREGATE AMOUNT
             IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)    PERCENT OF CLASS REPRESENTED
             BY AMOUNT IN ROW (9)
                                             0.6%
-----------------------------------------------------------------------------
     (12)    TYPE OF REPORTING PERSON **
                                             CO
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!




CUSIP No. 624758108                 13G                   Page 5 of 11 Pages

----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                             Owl Creek Asset Management, L.P.
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [ ]
                                                                  (b)  [x]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                             -0-
SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                             283,600
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                             -0-
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                             283,600
-----------------------------------------------------------------------------
     (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED
             BY EACH REPORTING PERSON
                                             283,600
-----------------------------------------------------------------------------
     (10)    CHECK BOX IF THE AGGREGATE AMOUNT
             IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)    PERCENT OF CLASS REPRESENTED
             BY AMOUNT IN ROW (9)
                                             1.0%
-----------------------------------------------------------------------------
     (12)    TYPE OF REPORTING PERSON **
                                             PN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 624758108                 13G                   Page 6 of 11 Pages

----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                                            Jeffrey A. Altman
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [ ]
                                                                  (b)  [x]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
                            United States
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                                             -0-
SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                                             449,100
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                                             -0-
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                             449,100
-----------------------------------------------------------------------------
     (9)     AGGREGATE AMOUNT BENEFICIALLY OWNED
             BY EACH REPORTING PERSON
                                             449,100
-----------------------------------------------------------------------------
     (10)    CHECK BOX IF THE AGGREGATE AMOUNT
             IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)    PERCENT OF CLASS REPRESENTED
             BY AMOUNT IN ROW (9)
                                             1.6%
-----------------------------------------------------------------------------
     (12)    TYPE OF REPORTING PERSON **
                                             IN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 624758108                 13G                    Page 7 of 11 Pages

Item 1(a).     Name of Issuer:

     The name of the issuer is Mueller Water Products, Inc. (the "Issuer").

Item 1(b).     Address of Issuer's Principal Executive Offices:

     The Issuer's principal executive offices are located at 1200 Abernathy
Road, Atlanta, Georgia 30328.

Item 2(a).     Name of Person Filing:

     This statement is filed by:

                  (i) Owl Creek I, L.P., a Delaware limited partnership, ("Owl
                  Creek I") with respect to the shares of Common Stock directly
                  owned by it;

                  (ii) Owl Creek II, L.P., a Delaware limited partnership, ("Owl
                  Creek II") with respect to the shares of Common Stock directly
                  owned by it;

                  (iii) Owl Creek Advisors, LLC, a Delaware limited liability
                  company (the "General Partner"), with respect to the shares of
                  Common Stock directly owned by Owl Creek I and Owl Creek II;

                  (iv) Owl Creek Asset Management, L.P. a Delaware limited
                  partnership (the "Investment Manager"), with respect to the
                  shares of Common Stock directly owned by Owl Creek Overseas
                  Fund, Ltd., an exempted company organized under the laws of
                  the Cayman Islands ("Owl Creek Overseas"),and Owl Creek
                  Socially Responsible Investment Fund, Ltd., an exempted
                  company organized under the laws of the Cayman Islands
                  ("SRIF"); and

                  (v) Jeffrey A. Altman, with respect to shares of Common Stock
                  owned by Owl Creek I, Owl Creek II, Owl Creek Overseas and
                  SRIF.

         The foregoing persons are hereinafter sometimes collectively referred
to as the "Reporting Persons." Any disclosures herein with respect to persons
other than the Reporting Persons are made on information and belief after making
inquiry to the appropriate party.

Item 2(b).     Address of Principal Business Office or, if None, Residence:

     The address of the principal business office of each of the Reporting
Persons is 640 Fifth Avenue, 20th Floor, New York, NY 10019.





CUSIP No. 624758108                 13G                    Page 8 of 11 Pages

Item 2(c).     Citizenship:

     Each of Owl Creek I, Owl Creek II and the Investment Manager is a limited
partnership organized under the laws of the State of Delaware. The General
Partner is a limited liability company organized under the laws of the State of
Delaware. Mr. Altman is a United States citizen.

Item 2(d).     Title of Class of Securities:
Series A Common Stock, par value $.01 par value per share (the "Common Stock").

Item 2(e).  CUSIP Number:  624758108

Item 3. If this statement is filed pursuant to Rules 13d-1(b) or 13d-2(b) or
(c), check whether the person filing is a:

          (a)   [ ] Broker or dealer registered under Section 15 of the Act,

          (b)   [ ] Bank as defined in Section 3(a)(6) of the Act,

          (c)   [ ] Insurance Company as defined in Section 3(a)(19) of the
                    Act,

          (d)   [ ] Investment Company registered under Section 8 of the
                    Investment Company Act of 1940,

          (e)   [ ] Investment Adviser in accordance with Rule 13d-1
                    (b)(1)(ii)(E),

          (f)   [ ] Employee Benefit Plan or Endowment Fund in accordance
                    with Rule 13d-1 (b)(1)(ii)(F),

          (g)   [ ] Parent Holding Company or control person in accordance
                    with Rule 13d-1 (b)(1)(ii)(G),

          (h)   [ ] Savings Association as defined in Section 3(b) of the
                    Federal Deposit Insurance Act,

          (i)   [ ] Church Plan that is excluded from the definition of an
                    investment company under Section 3(c)(14) of the Investment
                    Company Act of 1940,

          (j)   [ ] Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

     Not applicable





CUSIP No. 624758108                 13G                   Page 9 of 11 Pages

Item 4.   Ownership.

         A. Owl Creek I, L.P.
              (a) Amount beneficially owned: 17,700
              (b) Percent of class: 0.1%. The percentages used herein and in the
                rest of Item 4 are calculated based upon the 28,781,235 shares
                of Series A Common Stock that are outstanding as of February 9,
                2007 as reported by the Company in its Form 10-Q filed on
                February 9, 2007.
              (c)(i) Sole power to vote or direct the vote: 0
                (ii) Shared power to vote or direct the vote: 17,700
               (iii) Sole power to dispose or direct the disposition: 0
                (iv) Shared power to dispose or direct the disposition: 17,700

         B. Owl Creek II, L.P.
              (a) Amount beneficially owned: 147,800
              (b) Percent of class: 0.5%
              (c)(i) Sole power to vote or direct the vote: 0
                (ii) Shared power to vote or direct the vote: 147,800
               (iii) Sole power to dispose or direct the disposition: 0
                (iv) Shared power to dispose or direct the disposition: 147,800

         C. Owl Creek Advisors, LLC
              (a) Amount beneficially owned: 165,500
              (b) Percent of class: 0.6%
              (c)(i) Sole power to vote or direct the vote: 0
                (ii) Shared power to vote or direct the vote: 165,500
               (iii) Sole power to dispose or direct the disposition: 0
                (iv) Shared power to dispose or direct the disposition: 165,500

         D. Owl Creek Asset Management, L.P.
              (a) Amount beneficially owned:  283,600
              (b) Percent of class: 1.0%
              (c)(i) Sole power to vote or direct the vote: 0
                (ii) Shared power to vote or direct the vote: 283,600
               (iii) Sole power to dispose or direct the disposition: 0
                (iv) Shared power to dispose or direct the disposition: 283,600

         E. Jeffrey A. Altman
              (a) Amount beneficially owned: 449,100
              (b) Percent of class: 1.6%
              (c)(i) Sole power to vote or direct the vote: 0
                (ii) Shared power to vote or direct the vote: 449,100
               (iii) Sole power to dispose or direct the disposition: 0
                (iv) Shared power to dispose or direct the disposition: 449,100

Item 5.     Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof
the reporting person has ceased to be the beneficial owner of more than five
percent of the class of securities, check the following [X].




CUSIP No. 624758108                 13G                   Page 10 of 11 Pages

Item 6.   Ownership of More than Five Percent on Behalf of Another Person.

         Not Applicable.


Item 7.   Identification and Classification of the Subsidiary Which Acquired
the Security Being Reported on by the Parent Holding Company.

     Not Applicable.

Item 8.  Identification and Classification of Members of the Group.

     Not Applicable.

Item 9.  Notice of Dissolution of Group.

     Not Applicable.

Item 10. Certification.

     Each of the Reporting Persons hereby makes the following certification:

          By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.





CUSIP No. 624758108                 13G                   Page 11 of 11 Pages

SIGNATURES

After reasonable inquiry and to the best of our knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.


DATED:  February 14, 2007

                                 /s/ Jeffrey A. Altman
                                 -------------------------
                                 Jeffrey A. Altman, individually, and as
                                 managing member of Owl Creek Advisors, LLC,
                                 for itself and as general partner of
                                 Owl Creek I, L.P. and Owl Creek II L.P.,
                                 and as managing member of the general
                                 partner of Owl Creek Asset Management, L.P.,
                                 for itself and as investment manager to Owl
                                 Creek Overseas Fund, Ltd. and Owl Creek
                                 Socially Responsible Investment Fund, Ltd.