Quanta Services to Present at the D.A. Davidson Sixth Annual Engineering & Construction Conference

HOUSTON, Sept. 17 /PRNewswire-FirstCall/ -- Quanta Services, Inc. (NYSE: PWR) today announced that the company will participate in the D.A. Davidson Sixth Annual Engineering & Construction Conference to be held September 20, 2007 at The Fairmont Hotel in San Francisco.

John R. Colson, Chief Executive Officer and James H. Haddox, Chief Financial Officer, are scheduled for a company presentation from 7:55 a.m. to 8:35 a.m. Pacific Daylight Time on September 20, 2007. Quanta's presentation will be broadcast live over the Internet. The live web cast link will be available on the company's website at http://www.quantaservices.com and will also be archived for replay on the website.

Quanta Services, Inc. is a leading provider of specialized contracting services, delivering end-to-end network solutions for the 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         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 September 17, 2007