Quanta Services Announces 2007 Second Quarter Earnings Release and Conference Call Schedule

HOUSTON, July 24 /PRNewswire-FirstCall/ -- Quanta Services, Inc. (NYSE: PWR) announced today that it will release 2007 second quarter results on Thursday, Aug. 2, 2007, before the market opens. In conjunction with the release, Quanta has scheduled a conference call which will be broadcast live over the Internet on Thursday, Aug. 2, 2007, at 9:30 a.m. Eastern time.

    What:   Quanta Services 2007 Second Quarter Earnings Conference Call
    When:   Thursday, Aug. 2, 2007 - 9:30 a.m. Eastern time
    How:    Live via phone - by dialing (303) 262-2139 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 address
             below.
    Where:  http://www.quantaservices.com

For those who cannot listen to the live call, a telephonic replay will be available through Aug. 9, 2007, and may be accessed by calling (303) 590-3000 and using the pass code 11094322. Also, an archive of the webcast will be available shortly after the call on the company's Web site at www.quantaservices.com. For more information, please contact Karen Roan at DRG&E at 713-529-6600 or email kcroan@drg-e.com.

Quanta Services, Inc. is a leading provider of specialized contracting services, delivering end-to-end network solutions for electric power, gas, telecommunications and cable television industries. The company's comprehensive services include designing, installing, repairing and maintaining network infrastructure nationwide.

     Contacts:  James Haddox, CFO
                Reba Reid
                Quanta Services, Inc.
                713-629-7600

                Ken Dennard / ksdennard@drg-e.com
                Kip Rupp / krupp@drg-e.com
                DRG&E
                713-529-6600

SOURCE Quanta Services, Inc.

Released July 24, 2007