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

HOUSTON, Oct. 18 /PRNewswire-FirstCall/ -- Quanta Services, Inc. (NYSE: PWR) announced today that it will release 2007 third quarter results on Thursday, November 8, 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, November 8, 2007, at 9:30 a.m. Eastern time.

    What:   Quanta Services 2007 Third Quarter Earnings Conference Call
    When:   Thursday, November 8, 2007 - 9:30 a.m. Eastern time
    How:    Live via phone - By dialing (303) 205-0033 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 November 15, 2007, and may be accessed by calling (303) 590-3000 and using the pass code 11099733#. 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 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.

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

SOURCE Quanta Services, Inc.

Released October 18, 2007