X0202 4 2007-02-28 0 0001050915 QUANTA SERVICES INC PWR 0001079430 COLSON JOHN R 1360 POST OAK BLVD., SUITE 2100 HOUSTON TX 77056-3023 1 1 0 0 Chief Executive Officer Common Stock 2007-02-28 4 F 0 2971 22.68 D 1716267 D Common Stock 2007-02-28 4 F 0 3604 22.68 D 1712663 D Common Stock 2007-02-28 4 F 0 10655 22.68 D 1702008 D Common Stock 13500 I By General Partnership Exhibit 24 - Power of Attorney These shares were withheld to cover taxes associated with vest of shares of restricted stock issued under the Company's 2001 Stock Incentive Plan (as amended and restated March 13, 2003). Share holdings amount reflects an increase of 4,027 shares to previously reported end of period holdings resulting from the prior purchase by Mr. Colson of such shares under the Company?s 1999 Employee Stock Purchase Plan in an exempt transaction pursuant to Rule 16b-3(c) of the Securities Exchange Act of 1934. /s/ John R. Colson 2007-03-01