SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* FIRST RESERVE GP IX INC (Last) (First) (Middle) ONE LAFAYETTE PLACE THIRD FLOOR (Street) GREENWICH CT 06830 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol QUANTA SERVICES INC [ PWR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 03/14/2005
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/14/2005		S		3,544,400(1)	D	$7.16	11,616,652(2)	I(3)	See FN(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* FIRST RESERVE GP IX INC (Last) (First) (Middle) ONE LAFAYETTE PLACE THIRD FLOOR (Street) GREENWICH CT 06830 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* FIRST RESERVE FUND IX L P (Last) (First) (Middle) ONE LAFAYETTE PLACE (Street) GREENWICH CT 06830 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* FIRST RESERVE GP IX L P (Last) (First) (Middle) ONE LAFAYETTE PLACE (Street) GREENWICH CT 06830 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. The sale of shares as reported on this Form 4 were made by First Reserve Fund IX, L.P.

2. Consists of (i) 11,554,804 shares of Common Stock held directly by First Reserve Fund IX, L.P.; (ii) 45,187 shares of Common Stock issued to Ben A. Guill in his capacity as a director of the Issuer; and (iii) 16,661 shares of Common Stock held of record by Thomas Sikorski, a former director of the Issuer, for an aggregate of 11,616,652 shares of Common Stock. The Fund Entities (as defined in Footnote 3) have an interest in a portion of the proceeds from the aforementioned common stock issued to Messrs. Guill and Sikorski. Messrs. Guill and Sikorski disclaim beneficial ownership of any securities of the Issuer held by the Fund Entities.

3. This Form 4 is being filed on behalf of First Reserve GP IX, Inc. ("GP IX Inc."), First Reserve GP IX, L.P. ("GP IX"), and First Reserve Fund IX, L.P. ("Fund IX"), each as 10% beneficial owners (collectively the "Fund Entities"). GP IX is the general partner of Fund IX and may be deemed to beneficially own all of the shares of Common Stock owned by Fund IX. GP IX Inc., as the general partner of GP IX, may be deemed to beneficially own all of the shares of Common Stock owned by Fund IX.

Remarks:

First Reserve GP IX, Inc., by Anne E. Gold, is signing for itself as the designated filer, as well as in its capacity as the general partner of GP IX. GP IX is signing for Fund IX, as its general partner.

	Anne E. Gold, Assistant Secretary to First Reserve GP IX, Inc.	03/15/2005
	Anne E. Gold	03/15/2005
	Anne E. Gold	03/15/2005
	** Signature of Reporting Person	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).
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