HOUSTON, July 28 /PRNewswire-FirstCall/ -- Quanta Services, Inc. (NYSE: PWR) announced today that it will release 2009 second quarter results on Wednesday, August 5, 2009, before the market opens. In conjunction with the release, Quanta has scheduled a conference call which will be broadcast live over the Internet on Wednesday, August 5, 2009, at 9:30 a.m. Eastern time. What: Quanta Services 2009 Second Quarter Earnings Conference Call When: Wednesday, August 5, 2009 - 9:30 a.m. Eastern time How: Live via phone - By dialing (480) 629-9642 and asking for the Quanta Services call at least 10 minutes prior to the start time. Live over the Internet - by logging on to the web at the following address: http://quantaservices.com/ For those who cannot listen to the live call, a telephonic replay will be available through August 12, 2009, and may be accessed by calling (303) 590-3030 and using the pass code 4125867#. Also, an archive of the webcast will be available shortly after the call on the company's website at http://www.quantaservices.com/ . For more information, please contact Karen Roan at DRG&E at 713-529-6600 or email . 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 designing, installing, repairing and maintaining network infrastructure nationwide. Additionally, Quanta provides dark fiber construction and leasing 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. Contacts: James Haddox, CFO Ken Dennard / Reba Reid Kip Rupp / Quanta Services Inc. DRG&E 713-629-7600 713-529-6600 DATASOURCE: Quanta Services, Inc. CONTACT: James Haddox, CFO or Reba Reid, both of Quanta Services Inc., +1-713-629-7600; or Ken Dennard, , or Kip Rupp, , or Karen Roan, , all of DRG&E, +1-713-529-6600, for Quanta Services, Inc. Web Site: http://www.quantaservices.com/

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