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EXHIBIT 21.1
ORGANIZATION AND OWNERSHIP OF SHARES OF SUBSIDIARIES; AFFILIATES
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SUBSIDIARY STATE OF STOCKHOLDER
INCORPORATION
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Advanced Communication Technologies, Inc. Oregon NorAm Telecommunications, Inc.
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Arby Construction, Inc. Delaware Quanta Services, Inc.
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Austin Trencher, Inc. Delaware Quanta Services, Inc.
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CCLC, Inc. Delaware Conti Communications, Inc.
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Coast to Coast, L.L.C. California Environmental Professional
Associates, Limited
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Computapole, Inc. Delaware Quanta Services, Inc.
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Conti Communications, Inc. Delaware Quanta Services, Inc.
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Crown Fiber Communications, Inc. Virginia Quanta Services, Inc.
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Dillard Smith Construction Company Delaware Quanta Services, Inc.
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Driftwood Electrical Contractors, Inc. Delaware Quanta Services, Inc.
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Edwards Pipeline Company, Inc. Delaware Quanta Services, Inc.
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Environmental Professional Associates, Limited California Quanta Services, Inc.
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Fiber Technology, Inc. Texas Quanta Services, Inc.
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Five Points Construction Company Delaware Underground Construction Co., Inc.
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GEM Engineering Co., Inc. Delaware Quanta Services, Inc.
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Golden State Utility Co. Delaware Quanta Services, Inc.
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Grand Electric Company Delaware Quanta Services, Inc.
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H.L. Chapman Pipeline Construction, Inc. Delaware Quanta Services, Inc.
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Haines Construction Company Delaware Quanta Services, Inc.
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Harker & Harker, Inc. Nevada Quanta Services, Inc.
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Intermountain Electric, Inc. Colorado Quanta Services, Inc.
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Lake Norman Pipeline, LLC North Carolina Edwards Pipeline Company, Inc.
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Manuel Bros., Inc. Delaware Quanta Services, Inc.
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Network Communications Services, Inc. Delaware Quanta Services, Inc.
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NorAm Telecommunications, Inc. Oregon Quanta Services, Inc.
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North Pacific Construction Company Delaware Quanta Services, Inc.
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North Sky Communications Delaware Quanta Services, Inc.
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Northern Line Layers, Inc. Delaware Quanta Services, Inc.
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SUBSIDIARY STATE OF STOCKHOLDER
INCORPORATION
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Pac West Construction, Inc. Delaware Quanta Services, Inc.
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PAR Electrical Contractors, Inc. Missouri Quanta Services, Inc.
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PDG Electric Company Florida Quanta Services, Inc.
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Potelco, Inc. Washington Quanta Services, Inc.
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QSI, Inc. Delaware Quanta Services, Inc.
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Quanta Acquisition XLV, Inc. Delaware Quanta Services, Inc.
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Quanta Delaware, Inc. Delaware Quanta Services, Inc.
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Quanta L Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta LI Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta LII Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta LIII Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta Services Management Partnership, L.P. Texas
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Quanta Utility Installation Co., Inc. Delaware Quanta Services, Inc.
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Quanta XLI Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XLII Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XLIII Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XLIV Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XLIX Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XLVI Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XLVII Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XLVIII Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XVII Acquisition, Inc. Delaware Quanta Services, Inc.
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Quanta XXXIX Acquisition, Inc. Delaware Quanta Services, Inc.
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R. A. Waffensmith & Co., Inc. Delaware Quanta Services, Inc.
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Ranger Directional, Inc. Delaware Quanta Services, Inc.
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S.K.S. Pipeliners, Inc. Delaware Quanta Services, Inc.
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Seaward Corporation Maine Quanta Services, Inc.
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Spalj Construction Company Delaware Quanta Services, Inc.
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Specialty Drillling, Inc. Delaware Quanta Services, Inc.
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Sullivan Welding, Inc. Delaware Quanta Services, Inc.
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Sumter Builders, Inc. Delaware Quanta Services, Inc.
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Telecom Network Specialists, Inc. Delaware Quanta Services, Inc.
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The Ryan Company, Inc. Massachusetts Quanta Services, Inc.
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Tom Allen Construction Company Delaware Quanta Services, Inc.
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TRANS TECH Electric, Inc. Indiana Quanta Services, Inc.
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Trawick Construction Co. Florida Quanta Services, Inc.
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TTM, Inc. North Carolina Quanta Services, Inc.
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SUBSIDIARY STATE OF STOCKHOLDER
INCORPORATION
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TVS Systems, Inc. Delaware Quanta Services, Inc.
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Underground Construction Co., Inc. Delaware Quanta Services, Inc.
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Utilco, Inc. Georgia Quanta Services, Inc.
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VCI Telecom, Inc. Delaware Quanta Services, Inc.
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W.H.O.M. Corporation California Quanta Services, Inc.
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Wade D. Taylor, Inc. Delaware Quanta Services, Inc.
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West Coast Communications, Inc. Delaware Quanta Services, Inc.
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World Fiber, Inc. Delaware Quanta Services, Inc.
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