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

HOUSTON, April 26 /PRNewswire-FirstCall/ -- Quanta Services, Inc. (NYSE: PWR) announced today that it will release 2007 first quarter results on Thursday, May 3, 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, May 3, 2007, at 9:30 a.m. Eastern time.

     What:     Quanta Services 2007 First Quarter Earnings Conference Call
     When:     Thursday, May 3, 2007 - 9:30 a.m. Eastern time
     How:      Live via phone - By dialing (303) 262-2200 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 May 10, 2007, and may be accessed by calling (303) 590-3000 and using the pass code 11089143. 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 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 May 2, 2007