Form: SC 13G/A

Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

February 9, 2004

SC 13G/A: Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions

Published on February 9, 2004






SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549



SCHEDULE 13G/A
(AMENDMENT NO. 4)

UNDER THE SECURITIES EXCHANGE ACT OF 1934


QUANTA SERVICES, INC.
------------------------------------------------------
(NAME OF ISSUER)


COMMON STOCK, $.00001 PAR VALUE PER SHARE
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(TITLE OF CLASS OF SECURITIES)


74762E102
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(CUSIP NUMBER)

Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

[X] Rule 13d-1(b)

[ ] Rule 13d-1(c)

[ ] Rule 13d-1(d)


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 the purpose 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).





- - ------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

THIRD AVENUE MANAGEMENT LLC

(EIN 01-0690900)

- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) [ ]
(b) [ ]
- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
3 SEC USE ONLY

- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION

DELAWARE LIMITED LIABILITY COMPANY

- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
5 SOLE VOTING POWER

6,652,200
NUMBER OF ---------------------------------------------------------------
---------------------------------------------------------------
SHARES 6 SHARED VOTING POWER
BENEFICIALLY
OWNED BY NONE
---------------------------------------------------------------
---------------------------------------------------------------
EACH 7 SOLE DISPOSITIVE POWER
REPORTING
PERSON 7,117,900

---------------------------------------------------------------
---------------------------------------------------------------
WITH 8 SHARED DISPOSITIVE POWER

NONE
- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON

7,117,900
- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
CERTAIN SHARES*
[ ]

- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

6.1%
- - ------------------------------------------------------------------------------
- - ------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*

IA
- - ------------------------------------------------------------------------------

ITEM 1.

(A) NAME OF ISSUER:

Quanta Services, Inc. (the "Issuer").

(B) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES OR,IF NONE, RESIDENCE:

1360 Post Oak Blvd, Suite 2100, Houston, TX 77056

ITEM 2.

(A) NAME OF PERSON FILING:

This schedule is being filed by Third Avenue Management LLC ("TAM").
(TAM is sometimes referred to hereinafter as "Filer").

(B) ADDRESS OF PRINCIPAL BUSINESS OFFICE:

The address of the principal executive office of TAM is:
622 Third Avenue, 32nd Floor, New York, New York 10017.

(C) CITIZENSHIP:

The citizenship or place of organization of the reporting person is as
follows:

Delaware Limited Liability Company.

(D) TITLE OF CLASS OF SECURITIES:

Common Stock, $.00001 par value per share.

(E) CUSIP NUMBER:

74762E102

ITEM 3. IF THIS STATEMENT IS BEING FILED PURSUANT TO RULES 13D-1(B), OR
13D-2(B), CHECK WHETHER THE PERSON FILING IS A:

(E) Investment Adviser. TAM is registered under Section 203 of the
Investment Advisers Act Of 1940.

ITEM 4. OWNERSHIP.

(a) & (b) TAM beneficially owns 7,117,900 shares, or 6.1% of the class of
securities of the issuer.

(c) (i) TAM: 6,652,200

(ii) Not applicable.

(iii) TAM: 7,117,900

(iv) Not applicable.

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 [ ].

ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

Third Avenue Value Fund, an investment company registered under the
Investment Company Act of 1940, has the right to receive dividends from, and the
proceeds from the sale of, 4,847,600 of the shares reported by TAM, and
Various separately managed accounts for whom TAM acts as investment advisor
have the right to receive dividends from, and the proceeds of the sale of
149,200 shares reported by TAM.

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.

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


SIGNATURE

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

February 9, 2004
---------------------------
(Date)




THIRD AVENUE MANAGEMENT LLC

BY:/S/ MARTIN J. WHITMAN
------------------------
Martin J. Whitman
Chairman and Co-Chief Investment Officer