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

                                 SCHEDULE 13G/A*
                                 (Rule 13d-102)

                                 Amendment No. 4

             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)

                                Tetra Tech, Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                    88162G103
                                 (CUSIP Number)

                                December 31, 2008
             (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 12 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. 88162G103                13G/A                   Page 2 of 12 Pages

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

BENEFICIALLY   (6)  SHARED VOTING POWER
                                              -0-
OWNED BY       --------------------------------------------------------------

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

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                              -0-
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                              -0-
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                              0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                              IA
-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!




CUSIP No. 88162G103                13G/A                   Page 3 of 12 Pages

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

BENEFICIALLY   (6)  SHARED VOTING POWER
                                              -0-
OWNED BY       --------------------------------------------------------------

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

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                              -0-
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                              -0-
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                              0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                              PN
-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!




CUSIP No. 88162G103                13G/A                   Page 4 of 12 Pages

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

BENEFICIALLY   (6)  SHARED VOTING POWER
                                              -0-
OWNED BY       --------------------------------------------------------------

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

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                              -0-
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                              -0-
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                              0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                              OO
-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 88162G103                13G/A                   Page 5 of 12 Pages

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

BENEFICIALLY   (6)  SHARED VOTING POWER
                                              -0-
OWNED BY       --------------------------------------------------------------

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

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                              -0-
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                              -0-
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                              0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                              PN
-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!




CUSIP No. 88162G103                13G/A                   Page 6 of 12 Pages

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

BENEFICIALLY   (6)  SHARED VOTING POWER
                                              -0-
OWNED BY       --------------------------------------------------------------

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

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                              -0-
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                              -0-
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                              0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                              OO
-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!




CUSIP No. 88162G103                13G/A                   Page 7 of 12 Pages

-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            I.R.S. IDENTIFICATION NO.
            OF ABOVE PERSONS (ENTITIES ONLY)
                                                          Jeffrey L. Gendell
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (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
                                              -0-
OWNED BY       --------------------------------------------------------------

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

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                                              -0-
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
                                              -0-
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
                                              0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
                                              IN
-----------------------------------------------------------------------------
                    ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 88162G103                13G/A                   Page 8 of 12 Pages

The Schedule 13G/A filed on February 12, 2008, is hereby amended and restated by
this Amendment No. 4 to the Schedule 13G.

Item 1(a).     Name of Issuer:

     The name of the issuer is Tetra Tech, Inc. (the "Company").

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

     The Company's principal executive offices are located at 3475 East Foothill
Boulevard, Pasadena, California 91107.

Item 2(a).     Name of Person Filing:

     This statement is filed by:

          (i) Tontine Overseas Associates, L.L.C., a limited liability company
              organized under the laws of the State of Delaware ("TOA"), which
              serves as investment manager to Tontine Capital Overseas Master
              Fund, L.P., a Cayman Islands partnership ("TCO"), and Tontine
              Overseas Fund Ltd., a Cayman Islands Corporation ("TO") with
              respect to the shares of Common Stock directly owned by TCO
              and TO;

         (ii) Tontine Capital Partners, L.P., a Delaware limited partnership
              ("TCP") with respect to the shares of Common Stock directly owned
              by it;

        (iii) Tontine Capital Management, L.L.C., a Delaware limited liability
              company organized under the laws of the State of Delaware ("TCM"),
              with respect to the shares of Common Stock directly owned by TCP;

         (iv) Tontine Partners, L.P., a Delaware limited partnership
              ("TP") with respect to the shares of Common Stock directly
              owned by it;

          (v) Tontine Management, L.L.C., a Delaware limited liability
              company organized under the laws of the State of Delaware
              ("TM"), with respect to the shares of Common Stock directly
              owned by TP; and

         (vi) Jeffrey L. Gendell, a United States citizen ("Mr. Gendell")
              with respect to the shares of Common Stock directly owned by
              each of TCO, TO, TCP and TP.

              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.






CUSIP No. 88162G103                  13G/A                 Page 9 of 12 Pages

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

     The address of the business office of each of the Reporting Persons is 55
Railroad Avenue, Greenwich, Connecticut 06830.

Item 2(c).     Citizenship:

     See Item 2(a) above.

Item 2(d).     Title of Class of Securities:

     Common Stock, $0.01 par value (the "Common Stock")

Item 2(e).  CUSIP Number:

     88162G103

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 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. 88162G103               13G/A                  Page 10 of 12 Pages

Item 4.   Ownership.

         TCM, the general partner of TCP, has the power to direct the affairs of
TCP, including decisions respecting the disposition of the proceeds from the
sale of the shares of the Company. TM, the general partner of TP, has the power
to direct the affairs of TP, including decisions respecting the disposition of
the proceeds from the sale of the shares of the Company. Mr. Gendell is the
managing member of TCM, TM and TOA, and in that capacity directs their
operations. Each of the clients of TOA has the power to direct the receipt of
dividends from or the proceeds of sale of such shares.

         A.   Tontine Overseas Associates, L.L.C.
              (a) Amount beneficially owned: -0-
              (b) Percent of class: 0%  The percentages used herein and in the
rest of Item 4 are calculated based upon the 59,875,662 shares of Common Stock
issued and outstanding as of November 10, 2008 as reflected in the Company's
Form 10-K for the fiscal year ended September 28, 2008.
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: -0-
               (iii) Sole power to dispose or direct the disposition: -0-
              (iv) Shared power to dispose or direct the disposition: -0-

         B.   Tontine Capital Partners, L.P.
              (a) Amount beneficially owned: -0-
              (b) Percent of class: 0%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: -0-
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: -0-

         C.   Tontine Capital Management, L.L.C.
              (a) Amount beneficially owned: -0-
              (b) Percent of class: 0%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: -0-
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: -0-

         D.   Tontine Partners, L.P.
              (a) Amount beneficially owned: -0-
              (b) Percent of class: 0%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: -0-
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: -0-

         E.   Tontine Management, L.L.C.
              (a) Amount beneficially owned: -0-
              (b) Percent of class: 0%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: -0-
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: -0-

         D.   Jeffrey L. Gendell
              (a) Amount beneficially owned: -0-
              (b) Percent of class: 0%
              (c)(i) Sole power to vote or direct the vote: -0-
                (ii) Shared power to vote or direct the vote: -0-
               (iii) Sole power to dispose or direct the disposition: -0-
                (iv) Shared power to dispose or direct the disposition: -0-





CUSIP No. 88162G103                  13G/A                Page 11 of 12 Pages

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]

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.

         See Item 2.

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. 88162G103                 13G/A                 Page 12 of 12 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:  January 23, 2009

                                    /s/ Jeffrey L. Gendell
                                    -----------------------------
                                    Jeffrey L. Gendell, individually, and as
                                    managing member of
                                    Tontine Capital Management, L.L.C.,
                                    general partner of
                                    Tontine Capital Partners, L.P.
                                    and as managing member of
                                    Tontine Management L.L.C.,
                                    general partner of
                                    Tontine Partners, L.P.
                                    and as managing member of
                                    Tontine Overseas Associates, L.L.C.