$200 Million Added to Existing Contract to Strengthen New England Transmission Grid HOUSTON, Feb. 23 /PRNewswire-FirstCall/ -- Quanta Services, Inc. (NYSE: PWR) and Northeast Utilities (NYSE:NU) today announced the addition of $200 million in services and an extension of two years to their existing multi-year contract under which Quanta is providing transmission infrastructure services related to NU's transmission build-out through 2015. The anticipated value of the original contract, signed in December 2007, was $750 million and it extended from 2008 to 2013. With this recent expansion, the anticipated value of the contract is now $950 million through 2015. Under the now eight-year contract, Quanta will continue to provide labor, equipment and general project management for NU's transmission projects throughout New England. "A strong transmission grid is vital to New England's safety, security and economic prosperity. Quanta's proven expertise in transmission infrastructure services, nationwide scope and large workforce are key elements in solving the transmission limitations in New England," said Charles W. Shivery, chairman, president and chief executive officer of Northeast Utilities. "This arrangement builds on the ongoing success of the recently energized Middletown-Norwalk project, where Quanta's expertise in providing transmission construction services across 45 miles in Connecticut aided us in completing the major project ahead of schedule by one year and nearly $100 million below budget," Shivery said. "As New England's energy future becomes more complex and demanding, we are continuing efforts to improve the transmission system with infrastructure projects that strengthen the grid and provide benefits to the region's customers. We also see the possibility of renewable-related projects in the future. This extended agreement assures we have the expertise and resources available to meet our future project work." John Colson, chairman and chief executive officer of Quanta Services stated: "We share NU's commitment to strengthening electric reliability and helping New England meet the region's aggressive energy, environmental and economic goals. As a regional and national transmission leader, NU is working to develop New England energy solutions from diverse sources. We are committed to enhancing the transmission infrastructure to improve that access." About Northeast Utilities Northeast Utilities (NYSE:NU), a Fortune 500 energy company based in Connecticut, operates New England's largest energy delivery system. NU is committed to safety, reliability, environmental leadership and stewardship, and expanding energy options for its more than 2 million electricity and natural gas customers. For more information on Northeast Utilities, visit http://www.nu.com/. About Quanta Services Quanta Services is a leading specialized contracting services company, delivering infrastructure network solutions for the electric power, natural gas, telecommunications and cable television industries. The company's comprehensive services include engineering, designing, installing, repairing and maintaining network infrastructure nationwide. With operations in all 50 states and Canada, Quanta has the manpower, resources and expertise to complete projects that are local, regional, national or international in scope. This press release (and any oral statements regarding the subject matter of this press release) 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: the expected value of the agreement, including the additional amount, between Quanta and Northeast Utilities and the scope, services, term and results of any related projects awarded under the agreement, 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, successful performance and completion of the agreement and the projects awarded thereunder; failure to realize the anticipated value of the agreement; adverse changes in economic and financial conditions, including the recent volatility in the capital markets; cancellation and termination provisions present in the agreement; delays or changes in scope of projects awarded under the agreement, including those that may result from future capital constraints; the inability of our customer to pay for services we provide; future growth in the electric utility industry; trends in relevant markets; and other factors affecting the business of the respective parties generally, including risks detailed in Quanta's Annual Report on Form 10-K for the year ended December 31, 2007, Quanta's Quarterly Reports on Form 10-Q for the quarters ended March 31, 2008, June 30, 2008 and September 30, 2008 and any other documents of Quanta filed 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. Quanta further expressly disclaims any written or oral statements made regarding the subject matter of this press release by any third party. 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 http://www.quantaservices.com/ or through the SEC's Electronic Data Gathering and Analysis Retrieval System (EDGAR) at http://www.sec.gov/. Contacts: James Haddox, CFO Frank Poirot Reba Reid Northeast Utilities Quanta Services, Inc. 860-665-3409 713-629-7600 DATASOURCE: Quanta Services, Inc. CONTACT: James Haddox, CFO, or Reba Reid, both of Quanta Services, Inc., +1-713-629-7600; or Frank Poirot of Northeast Utilities, +1-860-665-3409 Web Site: http://www.quantaservices.com/

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