Quanta Services Announces Third Quarter 2011 Earnings Release and Conference Call Schedule

HOUSTON, Oct. 25, 2011 /PRNewswire/ -- Quanta Services, Inc. (NYSE: PWR) announced today that it will release third quarter 2011 results on Wednesday, November 2, 2011, before the market opens. In conjunction with the release, Quanta has scheduled a conference call which will be broadcast...