EXHIBIT 99.1


     STATEMENT UNDER OATH OF PRINCIPAL EXECUTIVE OFFICER REGARDING FACTS AND
                 CIRCUMSTANCES RELATING TO EXCHANGE ACT FILINGS



I, John R. Colson, state and attest that:


(1) To the best of my knowledge, based upon a review of the covered reports of
Quanta Services, Inc., and, except as corrected or supplemented in a subsequent
covered report:

         o        no covered report contained an untrue statement of a material
                  fact as of the end of the period covered by such report (or in
                  the case of a report on Form 8-K or definitive proxy
                  materials, as of the date on which it was filed); and

         o        no covered report omitted to state a material fact necessary
                  to make the statements in the covered report, in light of the
                  circumstances under which they were made, not misleading as of
                  the end of the period covered by such report (or in the case
                  of a report on Form 8-K or definitive proxy materials, as of
                  the date on which it was filed).


(2) I have reviewed the contents of this statement with the Company's audit
committee.


(3) In this statement under oath, each of the following, if filed on or before
the date of this statement, is a "covered report":

         o        the Annual Report on Form 10-K for the fiscal year ended
                  December 31, 2001 filed with the Commission of Quanta
                  Services, Inc.;


         o        all reports on Form 10-Q, all reports on Form 8-K and all
                  definitive proxy materials of Quanta Services, Inc. filed with
                  the Commission subsequent to the filing of the Form 10-K
                  identified above; and


         o        any amendments to any of the foregoing.



/s/ JOHN R. COLSON                               Subscribed and sworn to
- ------------------                               before me this 14th day of
John R. Colson,                                  August 2002.
Chairman and
Chief Executive Officer                          /S/ MARY ST. MICHEL
August 14, 2002                                  -------------------------------
                                                 Notary Public

                                                 My Commission Expires: 12/21/05