Exhibit 99.1

		PRESS RELEASE

FOR IMMEDIATE RELEASE

09-16

Contacts:		James Haddox, CFO		Kip Rupp / krupp@drg-e.com
		Reba Reid		Ken Dennard / ksdennard@drg-e.com
		Quanta Services Inc.		DRG&E
		713-629-7600		713-529-6600

QUANTA SERVICES REPORTS 2009 THIRD QUARTER RESULTS
Gross Margins Continued to Improve

HOUSTON — Nov. 4, 2009 — Quanta Services, Inc. (NYSE: PWR) today announced results for the three and nine months ended September 30, 2009.

     Revenues in the third quarter of 2009 were $780.8 million compared to revenues of $1.05 billion in the third quarter of 2008. For the third quarter of 2009, net income attributable to common stock was $63.4 million or $0.32 per diluted share, as compared to $51.9 million or $0.28 per diluted share in the third quarter of 2008. Included in net income attributable to common stock for the third quarter of 2009 is $22.4 million of income, or a benefit of $0.11 per diluted share, from the release of income tax contingencies due to the expiration of various statutes of limitations related to federal and state tax returns. Adjusted diluted earnings per share (a non-GAAP measure) was $0.25 for the third quarter of 2009 compared to $0.32 for the third quarter of 2008. Adjusted diluted earnings per share is GAAP diluted earnings per share before the impact of tax contingency releases and certain non-cash items such as amortization of intangible assets, non-cash interest expense and non-cash compensation expense, all net of tax. See the attached table for a reconciliation of non-GAAP measures to the reported GAAP measures.

     “The slow economy continues to negatively affect the industries we serve and our revenues. However, our gross margins improved 130 basis points over the third quarter of 2008, a quarter during which we achieved $110 million more in higher margin emergency restoration service revenues. This gross margin improvement reflects our successful strategy of not pursuing lower margin work for the sake of revenues,” said John R. Colson, chairman and CEO of Quanta Services. “We believe the most significant effects of the recession are behind us. While the first quarter of 2010 may be challenging, we expect a meaningful recovery in the second half of next year as spending by our customers returns.”

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     Revenues for the first nine months of 2009 were $2.33 billion compared to $2.86 billion for the first nine months of 2008. For the first nine months of 2009, Quanta reported net income attributable to common stock of $118.2 million or $0.59 per diluted share, compared to $111.1 million or $0.63 per diluted share for the first nine months of last year. Included in net income attributable to common stock for the first nine months of 2009 is the previously discussed release of income tax contingencies in the third quarter of 2009. Adjusted diluted earnings per share was $0.59 for the first nine months of 2009 as compared to $0.76 for the first nine months of 2008. See the attached table for a reconciliation of non-GAAP measures to the reported GAAP measures.

     See Note (a) to the attached Consolidated Statements of Operations for an explanation of 2008 amounts that have been retrospectively restated as a result of the adoption of new accounting pronouncements effective Jan. 1, 2009.

     RECENT HIGHLIGHTS

	•		Completed Acquisition of Price Gregory Services, Incorporated — On Oct. 1, 2009, Quanta acquired, through a merger transaction, all of the outstanding common stock of Price Gregory Services, Incorporated. In connection with the merger, Quanta issued approximately 10.9 million shares of its common stock valued at $231.8 million and paid approximately $95.8 million in cash to the stockholders of Price Gregory. As the transaction was effective Oct. 1, 2009, the results of Price Gregory will be included in Quanta’s consolidated financial statements beginning on such date. Price Gregory provides natural gas and oil transmission pipeline infrastructure services in North America, specializing in the construction of large diameter transmission pipelines. The merger significantly expands Quanta’s existing natural gas and pipeline services and, when combined with Quanta’s electric power services, positions Quanta as a leader in the North American energy transmission infrastructure market.
	•		Secured Contract for Transmission Services — American Transmission Co. (ATC) awarded a contract valued at approximately $100 million to Quanta Services as part of the utility’s strategic plan to invest $2.5 billion in infrastructure improvements over the next ten years. Under the agreement, MJ Electric, a Quanta operating unit, will provide transmission line and substation work in the Upper Peninsula of Michigan and northern Wisconsin. The contract builds on Quanta’s long-standing relationship with ATC, which includes the successful completion of more than 100 miles of transmission line in this region.
	•		Hosted 7th Annual Utility Perspectives Symposium — More than 150 industry leaders and policy makers from 33 states convened in Washington, D.C. to participate in Quanta’s annual symposium, which is designed to address the various issues facing utilities and the energy market overall. Discussions regarding federal and state regulatory developments, renewable energy, smart grid and electric transmission infrastructure provided a dynamic forum during which attendees exchanged ideas and collaborated to strengthen the future of power delivery.

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OUTLOOK

     Quanta and its customers continue to operate in a challenging business environment with the economic downturn and weak capital markets. Therefore, management cannot predict the timing or extent of the impact that these conditions may have on demand for Quanta’s services, particularly in the near term. The following forward-looking statements are based on current expectations and actual results may differ materially.

     Quanta expects revenues for the fourth quarter of 2009 to range between $900 million and $950 million. This estimate includes a forecast of emergency restoration service revenues of $11 million versus approximately $47 million in emergency restoration service revenues being earned in the fourth quarter of 2008. It also includes an estimate of the results of Price Gregory for the full quarter. Diluted earnings per share for the fourth quarter of 2009 are estimated to be between $0.16 and $0.17. Quanta expects adjusted diluted earnings per share (a non-GAAP measure calculated on the same basis as the historical adjusted earnings per diluted share presented in this release) for the fourth quarter of 2009 to range from $0.26 to $0.27. Amortization of intangibles, non-cash interest expense and non-cash stock compensation expenses are forecasted to be approximately $34 million for the fourth quarter of 2009.

     Quanta Services has scheduled a conference call for Nov. 4, 2009, at 9:30 a.m. Eastern time. To participate in the call, dial (480) 629-9644 at least ten minutes before the conference call begins and ask for the Quanta Services conference call. Investors, analysts and the general public will also have the opportunity to listen to the conference call over the Internet by visiting the company’s Web site at www.quantaservices.com. To listen to the call live on the Web, please visit the Quanta Services Web site at least fifteen minutes early to register, download and install any necessary audio software. For those who cannot listen to the live webcast, an archive will be available shortly after the call on the company’s Web site at www.quantaservices.com. A replay will also be available through Nov. 11, 2009, and may be accessed at (303) 590-3030 and using the pass code 4178458#. For more information, please contact Karen Roan at DRG&E by calling (713) 529-6600 or email kcroan@drg-e.com.

     The non-GAAP measures in this press release and the attached table are provided to enable investors to evaluate performance excluding the effects of certain items that management believes impact the comparability of operating results between reporting periods. Reconciliations of other GAAP to non-GAAP measures not included in this press release and certain other items to be discussed during the conference call can be found on the company’s Web site at www.quantaservices.com in the “Financial News” section.

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     Quanta Services is a leading specialized contracting services company, delivering infrastructure network solutions for the electric power, natural gas and pipeline and telecommunication industries. The company’s comprehensive services include designing, installing, repairing and maintaining network infrastructure nationwide. Additionally, Quanta licenses point-to-point fiber optic telecommunications infrastructure in select markets and offers related design, procurement, construction and maintenance services. With operations throughout North America, Quanta has the manpower, resources and expertise to complete projects that are local, regional, national or international in scope.

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Forward-Looking Statements

This press release (and oral statements regarding the subject matter of this release, including those made on the conference call and webcast announced herein) contains forward-looking statements intended to qualify for the “safe harbor” from liability established by the Private Securities Litigation Reform Act of 1995. Forward-looking statements include, but are not limited to, projected revenues and earnings per share and other projections of financial and operating results and capital expenditures; growth or opportunities in particular markets; the impact of the Energy Policy Act of 2005, renewable energy initiatives, the recently enacted economic stimulus package and other potential legislative actions on future spending by customers; the potential benefits from acquisitions, including Price Gregory; the expected value of, and the scope, services, term and results of any related projects awarded under, agreements for services to be provided by Quanta; statements relating to the business plans or financial condition of utilities and our other customers; and Quanta’s strategies and plans, as well as statements reflecting expectations, intentions, assumptions or beliefs about future events, and other statements that do not relate strictly to historical or current facts. Although Quanta’s management believes that the expectations reflected in such forward-looking statements are reasonable, it can give no assurance that such expectations will prove to be correct. These statements can be affected by inaccurate assumptions and by a variety of risks and uncertainties that are difficult to predict or beyond our control, including, among others, quarterly variations in operating results; continuing declines in economic and financial conditions, including volatility in the capital markets; trends and growth opportunities in relevant markets; delays, reductions in scope or cancellations of existing projects, including as a result of capital constraints that may impact our customers; dependence on fixed price contracts and the potential to incur losses with respect to these contracts; estimates relating to the use of percentage-of-completion accounting; the successful negotiation, execution, performance and completion of pending and existing contracts; the ability to generate internal growth; the effect of natural gas and oil prices on Quanta’s operations and growth opportunities; the ability to effectively compete for new projects and market share; the failure of the Energy Policy Act of 2005, renewable energy initiatives, the recently enacted economic stimulus package or other potential legislative actions to result in increased demand for Quanta’s services; cancellation provisions within contracts and the risk that contracts are not renewed or are replaced on less favorable terms; the inability of customers to pay for services; the failure to recover on payment claims against project owners or to obtain adequate compensation for customer-requested change orders; the failure to effectively integrate Price Gregory and its operations or to realize potential synergies, such as cross-selling opportunities, from the acquisition; the ability to attract skilled labor and retain key personnel and qualified employees; potential shortage of skilled employees; estimates and assumptions in determining financial results and backlog; the ability to realize backlog; the ability to successfully identify, complete and integrate acquisitions; the potential adverse impact resulting from uncertainty surrounding acquisitions, including the ability to retain key personnel from the acquired businesses and the potential increase in risks already existing in Quanta’s operations; the adverse impact of goodwill or other intangible asset impairments; growth outpacing infrastructure; unexpected costs or liabilities that may arise from lawsuits or indemnity claims related to the services Quanta performs; liabilities for claims that are self-insured; risks associated with the implementation of an information technology solution; potential liabilities relating to occupational health and safety matters; the potential that participation in joint ventures exposes us to liability and/or harm to our reputation for failures of our partners; risks associated with operating in international markets; risks associated with our dependence on suppliers, subcontractors and equipment manufacturers; risks associated with Quanta’s fiber optic licensing business, including regulatory changes and the potential inability to realize a return on capital investments; beliefs and assumptions about the collectability of receivables; the cost of borrowing, availability of credit, fluctuations in the price and volume of Quanta’s common stock, debt covenant compliance, interest rate fluctuations and other factors affecting financing and investment activities; the ability to obtain performance bonds; the impact of a unionized workforce on operations and the ability to complete future acquisitions; the ability to continue to meet the requirements of the Sarbanes-Oxley Act of 2002; potential exposure to environmental liabilities; requirements relating to governmental regulation and changes thereto; rapid technological and structural changes that could reduce the demand for services; the ability to access sufficient funding to finance desired growth and operations; the potential conversion of Quanta’s outstanding convertible subordinated notes; provisions of our corporate governing documents could make an acquisition of our company more difficult; and other risks detailed in Quanta’s Annual Report on Form 10-K for the year ended December 31, 2008, Quanta’s Quarterly Reports on Form 10-Q for each of the quarters in 2009, and any other documents that Quanta files with the Securities and Exchange Commission (SEC). Should one or more of these risks materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those expressed or implied in any forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements, which are current only as of this date. Quanta does not undertake and expressly disclaims any obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. For a discussion of these risks, uncertainties and assumptions, investors are urged to refer to Quanta’s documents filed with the SEC that are available through the company’s Web site at www.quantaservices.com or through the SEC’s Electronic Data Gathering and Analysis Retrieval System (EDGAR) at www.sec.gov.

- Tables to follow -

		Quanta Services, Inc. and Subsidiaries Consolidated Statements of Operations For the Three and Nine Months Ended September 30, 2009 and 2008 (In thousands, except per share information) (Unaudited)

		Three Months Ended September 30,								Nine Months Ended September 30,
		2009				2008				2009				2008
						Restated(a)								Restated(a)
Revenues		$	780,794			$	1,053,355			$	2,332,703			$	2,858,679
Cost of services (including depreciation)			633,166				867,789				1,930,162				2,390,546
Gross profit			147,628				185,566				402,541				468,133
Selling, general & administrative expenses			71,018				80,126				217,591				227,134
Amortization of intangible assets			5,448				8,998				15,260				29,464
Operating income			71,162				96,442				169,690				211,535
Interest expense			(2,816	)			(9,837	)			(8,437	)			(29,153	)
Interest income			338				2,022				2,047				8,105
Loss on early extinguishment of debt			—				(2	)			—				(2	)
Other income (expense), net			592				(74	)			826				408
Income before income taxes			69,276				88,551				164,126				190,893
Provision for income taxes			5,320				36,614				45,036				79,817
Net income			63,956				51,937				119,090				111,076
Less: Net income attributable to noncontrolling interest			520				—				873				—
Net income attributable to common stock		$	63,436			$	51,937			$	118,217			$	111,076
Earnings per share attributable to common stock:
Basic earnings per share		$	0.32			$	0.30			$	0.60			$	0.65
Diluted earnings per share		$	0.32			$	0.28			$	0.59			$	0.63
Weighted average shares used in computing earnings per share:
Basic			198,608				173,007				198,618				172,168
Diluted			205,224				203,930				198,815				196,783

		Quanta Services, Inc. and Subsidiaries Calculation of Earnings Per Share For the Three and Nine Months Ended September 30, 2009 and 2008 (In thousands, except per share information) (Unaudited)

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2009				2008				2009				2008
						Restated(1)								Restated(1)
Income for diluted earnings per share:
Net income attributable to common stock		$	63,436			$	51,937			$	118,217			$	111,076
Effect of convertible notes under the “if-converted” method — interest expense addback, net of taxes			1,659				6,180				—				13,579
Net income attributable to common stock for diluted earnings per share		$	65,095			$	58,117			$	118,217			$	124,655
Calculation of weighted average shares for diluted earnings per share:
Weighted average shares outstanding for basic earnings per share			198,608				173,007				198,618				172,168
Effect of dilutive stock options			201				286				197				384
Effect of convertible subordinated notes under the “if-converted” method — weighted convertible shares issuable			6,415				30,637				—				24,231
Weighted average shares outstanding for diluted earnings per share			205,224				203,930				198,815				196,783
Diluted earnings per share:
Net income attributable to common stock		$	0.32			$	0.28			$	0.59			$	0.63

		Quanta Services, Inc. and Subsidiaries Non-GAAP Financial Measures For the Three and Nine Months Ended September 30, 2009 and 2008 (In thousands, except per share information) (Unaudited)

Reconciliation of Non-GAAP Financial Measures

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
Adjusted diluted earnings per share:		2009				2008				2009				2008
						Restated(1)								Restated(1)
Net income attributable to common stock (GAAP as reported)		$	63,436			$	51,937			$	118,217			$	111,076
Adjustments:
Impact of tax contingency releases (2)			(22,446	)			—				(22,446	)			—
Acquisition costs			1,313				—				1,313				—
Adjusted net income attributable to common stock before certain non-cash adjustments			42,303				51,937				97,084				111,076
Non-cash stock-based compensation, net of tax			3,031				2,466				8,927				7,565
Non-cash interest expense, net of tax(1)			711				3,075				2,092				9,010
Amortization of intangible assets, net of tax			3,323				5,489				9,309				17,973
Adjusted net income attributable to common stock after certain non-cash adjustments			49,368				62,967				117,412				145,624
Effect of convertible subordinated notes under the “if-converted” method — interest expense addback, net of tax			949				3,105				2,846				9,350
Adjusted net income attributable to common stock for adjusted diluted earnings per share		$	50,317			$	66,072			$	120,258			$	154,974
Calculation of weighted average shares for adjusted diluted earnings per share:
Weighted average shares outstanding for basic earnings per share			198,608				173,007				198,618				172,168
Effect of dilutive stock options			201				286				197				384
Effect of convertible subordinated notes under the “if converted” method — weighted convertible shares issuable			6,415				30,637				6,415				30,645
Weighted average shares outstanding for adjusted diluted earnings per share			205,224				203,930				205,230				203,197
Adjusted diluted earnings per share		$	0.25			$	0.32			$	0.59			$	0.76

The non-GAAP measures in this press release are provided to enable investors to evaluate quarterly performance excluding the effects of items that management believes impact the comparability of operating results between periods. More particularly, in addition to the adjustments in the third quarter of 2009 relating to certain tax benefits described in Note (2) above and acquisition costs, (i) amortization of intangible assets is impacted by Quanta’s acquisition activity, which can cause the amortization expense to vary period-to-period; (ii) non-cash interest expense results from the requirements of FSP APB 14-1 (FASB ASC 470-20) (see Note (a) to the Consolidated Statements of Operations) and varies from period-to-period depending on the amount of the convertible subordinated notes outstanding during the period, and (iii) non-cash compensation expense may vary due to acquisition activity and factors influencing the estimated fair value of performance-based awards.

		Quanta Services, Inc. and Subsidiaries Condensed Consolidated Balance Sheets (In thousands) (Unaudited)

		September 30,				December 31,
		2009				2008
						Restated(1)
ASSETS
CURRENT ASSETS:
Cash and cash equivalents		$	584,038			$	437,901
Accounts receivable, net			663,277				795,251
Costs and estimated earnings in excess of billings on uncompleted contracts			62,353				54,379
Inventories			31,920				25,813
Prepaid expenses and other current assets			61,372				72,063
Total current assets			1,402,960				1,385,407
PROPERTY AND EQUIPMENT, net			692,543				635,456
OTHER ASSETS, net			31,647				33,479
OTHER INTANGIBLE ASSETS, net			131,053				140,717
GOODWILL			1,375,902				1,363,100
Total assets		$	3,634,105			$	3,558,159
LIABILITIES AND EQUITY
CURRENT LIABILITIES:
Current maturities of long-term debt and notes payable		$	37			$	1,155
Accounts payable and accrued expenses			338,586				400,253
Billings in excess of costs and estimated earnings on uncompleted contracts			51,465				50,390
Total current liabilities			390,088				451,798
CONVERTIBLE SUBORDINATED NOTES, NET			125,493				122,275
DEFERRED INCOME TAXES AND OTHER NON-CURRENT LIABILITIES			294,782				301,712
Total liabilities			810,363				875,785
TOTAL STOCKHOLDERS’ EQUITY			2,822,869				2,682,374
NONCONTROLLING INTEREST			873				—
TOTAL EQUITY			2,823,742				2,682,374
Total liabilities and equity		$	3,634,105			$	3,558,159

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