CONSENT OF JOSEPH DECOSIMO

Published on June 23, 1999



EXHIBIT 23.4

CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation by
reference in this Registration Statement on Form S-3 of our report, dated August
24, 1998, on the financial statements of Dillard Smith Construction Company
included in the Current Report on Form 8-K of Quanta Services, Inc. filed on
June 17, 1999.

/s/ Joseph Decosimo and Company, LLP
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JOSEPH DECOSIMO AND COMPANY, LLP

Chattanooga, Tennessee
June 22, 1999