Form: 4/A

Statement of changes in beneficial ownership of securities

January 15, 2002

4/A: Statement of changes in beneficial ownership of securities

Published on January 15, 2002



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| FORM 4 | UNITED STATES SECURITIES AND EXCHANGE COMMISSION
+--------+ WASHINGTON, D.C. 20549
[_] Check this box if
no longer subject STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP
to Section 16.
Form 4 or Form 5 Filed pursuant to Section 16(a) of the Securities
obligations may Exchange Act of 1934, Section 17(a) of the
continue. See Public Utility Holding Company Act of 1935 or
Instruction 1(b). Section 30(f) of the Investment Company Act of 1940

(Print or Type Responses)

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1. Name and Address of Reporting Person*

Foster, Vincent D.
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(Last) (First) (Middle)

1300 Post Oak Blvd., Suite 800
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(Street)

Houston Texas 77056
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(City) (State) (Zip)


2. Issuer Name and Ticker or Trading Symbol Quanta Services, Inc.; Symbol "PWR"
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3. I.R.S. Identification Number of Reporting Person, if an entity
(voluntary)
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4. Statement for Month/Year 12/01
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5. If Amendment, Date of Original (Month/Year) 01/09/02
---------------------------------


6. Relationship of Reporting Person(s) to Issuer (Check all applicable)


X Director Officer 10% Owner Other
--- --- (give title below) --- ---(specify below)

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7. Individual or Joint/Group Filing (Check Applicable Line)

X Form filed by One Reporting Person
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Form filed by More than One Reporting Person
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Table I--Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned



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1. Title 2. Trans- 3. Trans- 4. Securities Acquired (A) 5. Amount of 6. Owner- 7. Nature
of action action or Disposed of (D) Securities ship of In-
Security Date Code (Instr. 3, 4 and 5) Beneficially Form: direct
(Instr. 3) (Month/ (Instr. 8) Owned at Direct Bene-
Day/ ----------------------------------------------- End of (D) or ficial
Year) Month Indirect Owner-
Code V Amount (A) or Price (Instr. 3 and 4) (I) ship
(D) (Instr. 4) (Instr. 4)
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Main Street
Limited Vote Common Equity Ventures
Stock 12/12/01 J(1) 15,564 D 15.70 0 I II, L.P.(2)
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Limited Vote Common
Stock 191,698 D
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Table II--Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)



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1. Title of Derivative 2. Conver- 3. Trans- 4. Transac- 5. Number of Deriv-
Security (Instr. 3) sion or action tion Code ative Securities
Exercise Date (Instr. 8) Acquired (A) or
Price of (Month/ Disposed of (D)
Deriv- Day/ (Instr. 3, 4, and 5)
ative Year)
Security

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Code V (A) (D)

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Table II--Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)


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6. Date Exer- 7. Title and Amount of 8. Price 9. Number 10. Owner- 11. Nature
cisable and Underlying Securities of of Deriv- ship of In-
Expiration (Instr. 3 and 4) Deriv- ative Form direct
Date ative Secur- of De- Benefi-
(Month/Day/ Secur- ities rivative cial
Year) ity Bene- Security Owner-
(Instr. ficially Direct ship
-------------------------------------------- 5) Owned (D) or (Instr.
Date Expira- Amount or at End Indirect 4)
Exer- tion Title Number of of Month (I)
cisable Date Shares (Instr. 4) (Instr. 4)
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Explanation of Responses:
(1) Exchange for redemption of limited partnership interests in Main Street
Equity Ventures II, L.P.
(2) The reporting person is Managing Director of Main Street Equity Ventures II,
L.P.

/s/ Vincent D. Foster 01/14/02
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Vincent D. Foster Date

Reminder: Report on a separate line for each class of securities beneficially
owned directly or indirectly.

* If the form is filed by more than one reporting person, see
Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal
Criminal Violations.
See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed.
If space is insufficient, see Instruction 6 for procedure.

SEC 1474(3-99)