Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Conaway John Michal
 2. Date of Event Requiring Statement (Month/Day/Year)
08/30/2007		 3. Issuer Name and Ticker or Trading Symbol
QUANTA SERVICES INC [PWR]
(Last)
(First)
(Middle)
1360 POST OAK BOULEVARD, SUITE 2100		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

HOUSTON, TX 77056-3023		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock (1) 6,115 (2)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Options (Right to buy) 08/30/2007 02/01/2016 Common Stock 18,265 (3) $ 13.1 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Conaway John Michal
1360 POST OAK BOULEVARD, SUITE 2100
HOUSTON, TX 77056-3023		   X      

Signatures

/s/ Tana L. Pool, Atty-in-Fact 08/31/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) Exhibit 24 - Power of Attorney
(2) Received in exchange for 5,000 shares of InfraSource Services, Inc. ("IFS") common stock in connection with the merger of IFS into Quanta Services, Inc. ("Quanta") (the "Merger") using the exchange ratio of 1.223 shares of Quanta common stock for each share of IFS common stock.
(3) Received in the Merger in exchange for an employee stock option to acquire 14,935 shares of IFS common stock for $16.01 per share. Such options were converted into options to acquire Quanta common stock using the exchange ratio of 1.223 shares of Quanta common stock for each share of IFS common stock. In connection with the change of control of IFS resulting from the Merger, all unvested options became fully vested on August 30, 2007.

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