Form: 10-K

Annual report pursuant to Section 13 and 15(d)

March 30, 2000

Documents

SUBSIDIARIES

Published on March 30, 2000




EXHIBIT 21.1


ORGANIZATION AND OWNERSHIP OF SHARES OF SUBSIDIARIES; AFFILIATES



============================================================================================================================
SUBSIDIARY STATE OF STOCKHOLDER
INCORPORATION
- ----------------------------------------------------------------------------------------------------------------------------

Advanced Communication Technologies, Inc. Oregon NorAm Telecommunications, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Arby Construction, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Austin Trencher, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
CCLC, Inc. Delaware Conti Communications, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Coast to Coast, L.L.C. California Environmental Professional
Associates, Limited
- ----------------------------------------------------------------------------------------------------------------------------
Computapole, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Conti Communications, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Crown Fiber Communications, Inc. Virginia Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Dillard Smith Construction Company Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Driftwood Electrical Contractors, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Edwards Pipeline Company, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Environmental Professional Associates, Limited California Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Fiber Technology, Inc. Texas Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Five Points Construction Company Delaware Underground Construction Co., Inc.
- ----------------------------------------------------------------------------------------------------------------------------
GEM Engineering Co., Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Golden State Utility Co. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Grand Electric Company Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
H.L. Chapman Pipeline Construction, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Haines Construction Company Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Harker & Harker, Inc. Nevada Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Intermountain Electric, Inc. Colorado Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Lake Norman Pipeline, LLC North Carolina Edwards Pipeline Company, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Manuel Bros., Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Network Communications Services, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
NorAm Telecommunications, Inc. Oregon Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
North Pacific Construction Company Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
North Sky Communications Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Northern Line Layers, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------



1



============================================================================================================================
SUBSIDIARY STATE OF STOCKHOLDER
INCORPORATION
- ----------------------------------------------------------------------------------------------------------------------------

Pac West Construction, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
PAR Electrical Contractors, Inc. Missouri Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
PDG Electric Company Florida Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Potelco, Inc. Washington Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
QSI, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta Acquisition XLV, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta Delaware, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta L Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta LI Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta LII Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta LIII Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta Services Management Partnership, L.P. Texas
- ----------------------------------------------------------------------------------------------------------------------------
Quanta Utility Installation Co., Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLI Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLII Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLIII Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLIV Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLIX Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLVI Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLVII Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XLVIII Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XVII Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Quanta XXXIX Acquisition, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
R. A. Waffensmith & Co., Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Ranger Directional, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
S.K.S. Pipeliners, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Seaward Corporation Maine Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Spalj Construction Company Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Specialty Drillling, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Sullivan Welding, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Sumter Builders, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Telecom Network Specialists, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
The Ryan Company, Inc. Massachusetts Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Tom Allen Construction Company Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
TRANS TECH Electric, Inc. Indiana Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Trawick Construction Co. Florida Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
TTM, Inc. North Carolina Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------


2




============================================================================================================================
SUBSIDIARY STATE OF STOCKHOLDER
INCORPORATION
- ----------------------------------------------------------------------------------------------------------------------------

TVS Systems, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Underground Construction Co., Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Utilco, Inc. Georgia Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
VCI Telecom, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
W.H.O.M. Corporation California Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
Wade D. Taylor, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
West Coast Communications, Inc. Delaware Quanta Services, Inc.
- ----------------------------------------------------------------------------------------------------------------------------
World Fiber, Inc. Delaware Quanta Services, Inc.
============================================================================================================================



















3