Exhibit 21.1
QUANTA SERVICES, INC. — SUBSIDIARIES LIST
The following is a list of the significant subsidiaries of Quanta Services, Inc. showing the place of incorporation or organization and the names under which each subsidiary does business. The names of certain subsidiaries are omitted as such subsidiaries, considered as a single subsidiary, would not constitute a significant subsidiary.
     
Subsidiary/Doing Business As   State of Incorporation/Organization
 
   
Advanced Technologies and Installation Corporation
  Washington
     Telecom Network Specialist
   
Allteck Line Contractors (USA), Inc.
  Washington
Allteck Line Contractors, Inc.
  British Columbia
Arby Construction, Inc.
  Delaware
Austin Trencher, Inc.
  Delaware
Blair Park Services, LLC
  Delaware
      Blair Park Services, LLC of Delaware
   
      InfraSource Blair Park Services, LLC
   
Bradford Brothers, Incorporated
  North Carolina
CCLC, Inc.
  Delaware
CMI Services, Inc.
  Florida
CAN-FER Construction Company
  Texas
Conti Communications, Inc.
  Delaware
      DE Conti Communications, Inc.
   
Croce Electric Company, Inc.
  Delaware
Dacon California
  California
Dashiell, LLC
  Delaware
Dashiell California, Inc.
  California
Digco Utility Construction, L.P.
  Delaware
      Brown Engineering
   
      Ranger Field Services
   
Dillard Smith Construction Company
  Delaware
EHV Elecon, Inc.
  Puerto Rico
EHV Power ULC
  Alberta
Fiber Technologies, Inc.
  Virginia
      Crown Fiber Communications
   
      Fiber Technologies, Inc. of Virginia
   
      Myers Cable, Inc.
   
      World Fiber
   
Five Points Construction Co.
  Texas
Global Enercom Management, Inc.
  Delaware
Golden State Utility Co.
  Delaware
H.L. Chapman Pipeline Construction, Inc.
  Delaware
      DB Utilities
   
      Chapman Pipeline Construction, Inc., H.L.
   
      Sullivan Welding
   
InfraSource Corporate Services, LLC
  Delaware
      InfraSource Company Services, LLC
   
      Quanta Technology
   
InfraSource Dacon, LLC
  Delaware

 


 

     
Subsidiary/Doing Business As   State of Incorporation/Organization
 
   
InfraSource Incorporated
  Delaware
InfraSource Maslonka CA, Inc.
  California
InfraSource Maslonka, LLC
  Delaware
InfraSource Power, LLC
  Minnesota
InfraSource Power California, Inc.
  California
InfraSource Services, Inc.
  Delaware
InfraSource Telecommunication Services, LLC
  Delaware
InfraSource Transmission Services Company
  Arizona
InfraSource Underground Construction, Inc.
  Delaware
      IUC Michigan, Inc.
   
      IUC Texas, Inc.
   
InfraSource Underground Construction, LLC
  Delaware
      IUC Illinois, LLC
   
      IUC Missouri, LLC
   
      IUC Montana, LLC
   
      IUC Nebraska, LLC
   
      IUC North Dakota, LLC
   
      IUC Washington, LLC
   
      IUS Wisconsin, LLC
   
InfraSource Underground Construction California, Inc.
  Delaware
InfraSource Underground Construction Services, LLC
  Delaware
InfraSource Underground Installation, LLC
  Delaware
InfraSource Underground Services, LLC
  Georgia
      IUS Underground, LLC
   
InfraSource Underground Services Canada, Inc.
  Delaware
Intermountain Electric, Inc.
  Colorado
      Colorado IM Electric
   
      Grand Electric
   
Irby Construction Company
  Mississippi
Lindsey Electric, L.P.
  Texas
Manuel Bros., Inc.
  Delaware
      Renaissance Construction
   
      Western Directional
   
Mechanical Specialties, Inc.
  Virginia
Mears Canada Corp.
  Nova Scotia
Mears Engineering/LLC
  Michigan
Mears Group, Inc.
  Delaware
Mears Services LLC
  Michigan
Mears/CPG LLC
  Michigan
Mears/HDD, LLC
  Michigan
Mearsmex S. de R.L. de C.V.
  Mexico
Mejia Personnel Services, Inc.
  Texas
Metro Underground Services, Inc. of Illinois
  Illinois
M.J. Electric, LLC
  Delaware
      M.J. Electric, LLC Iron Mountain
   
      M.J. Electric, Iron Mountain
   
      InfraSource M.J. Electric, LLC
   
      Iron Mountain M.J. Electric, LLC
   

 


 

     
Subsidiary/Doing Business As   State of Incorporation/Organization
 
   
M.J. Electric California, Inc.
  California
Network Electric Company
  Delaware
North Houston Pole Line, L.P.
  Delaware
North Sky Communications, Inc.
  Delaware
      Sky Communications
   
Okay Construction Company, LLC
  Delaware
OSP Consultants, Inc.
  Virginia
PAR Electrical Contractors, Inc.
  Missouri
PAR Internacional, S. de R.L. de C.V.
  Mexico
Parkside Site & Utility Company Corporation
  Delaware
Parkside Utility Construction Corp.
  Delaware
Potelco, Inc.
  Washington
Professional Teleconcepts, Inc.
  Illinois
      Professional Teleconcepts of Illinois
   
Professional Teleconcepts, Inc.
  New York
      Professional Teleconcepts of New York
   
      NY Professional Teleconcepts
   
      NY Professional Teleconcepts, Inc.
   
PWR Financial Company
  Delaware
PWR Network, LLC
  Delaware
QDE LLC
  Delaware
QPC, Inc.
  Delaware
QSI, Inc.
  Delaware
Quanta Asset Management LLC
  Delaware
Quanta Associates, L.P.
  Texas
Quanta Delaware, Inc.
  Delaware
Quanta Government Services, Inc.
  Delaware
Quanta Government Solutions, Inc.
  Delaware
Quanta International Limited
  British Virgin Islands
Quanta LX Acquisition, Inc.
  Delaware
Quanta LXI Acquisition, Inc.
  Delaware
Quanta LXII Acquisition, Inc.
  Delaware
Quanta LXIII Acquisition, Inc.
  Delaware
Quanta LXIV Acquisition, Inc.
  Delaware
Quanta LXV Acquisition, Inc.
  Delaware
Quanta LXVI Acquisition, Inc.
  Delaware
Quanta LXVII Acquisition, Inc.
  Delaware
Quanta LXVIII Acquisition, Inc.
  Delaware
Quanta LXIX Acquisition, Inc.
  Delaware
Quanta LXX Acquisition, Inc.
  Delaware
Quanta LXXI Acquisition, Inc.
  Delaware
Quanta LXXII Acquisition, Inc.
  Delaware
Quanta LXXIII Acquisition, Inc
  Delaware
Quanta Receivables, L.P.
  Delaware
Quanta Services Contracting, Inc.
  Delaware
Quanta Services Management Partnership, L.P.
  Texas
Quanta Services of Canada Ltd.
  British Columbia
Quanta Technology, LLC
  Delaware

 


 

     
Subsidiary/Doing Business As   State of Incorporation/Organization
 
   
Quanta Underground Services, Inc.
  Delaware
Quanta Utility Installation Company, Inc.
  Delaware
Quanta Utility Services — Gulf States, Inc.
  Delaware
Quanta Utility Services, LLC
  Delaware
Quanta Wireless Solutions, Inc.
  Delaware
R.A. Waffensmith & Co., Inc.
  Delaware
Realtime Engineers, Inc.
  Delaware
Realtime Utility Engineers, Inc.
  Wisconsin
Servicios Par Electric, S. de R.L. de C.V.
  Mexico
Southwest Trenching Company, Inc.
  Texas
Spalj Construction Company
  Delaware
      Delaware Spalj Construction
   
      Dot 05 Optical Communications
   
      Driftwood Electrical Contractors
   
      Smith Contracting
   
      Span-Con of Deerwood
   
      Tjader & Highstrom
   
      Thorstad Brother Tiling
   
      Wilson Roadbores
   
Spectrum Construction Contracting, L.L.C.
  Colorado
Sumter Utilities, Inc.
  Delaware
Sunesys, LLC
  Delaware
      Sunesys, LLC of Delaware
   
Sunesys of Massachusetts, LLC
  Delaware
Sunesys of Virginia, Inc.
  Virginia
The Ryan Company, Inc.
  Massachusetts
      Eastern Communications
   
      The Ryan Company Inc. of Massachusetts
   
      The Ryan Company of Massachusetts
   
      The Ryan Company Incorporated of Massachusetts
   
      The Ryan Company Incorporated Electrical Contractors
   
      Ryan Company Inc. (The)
   
Tjader, L.L.C.
  Delaware
Tom Allen Construction Company
  Delaware
      TA Construction
   
      Allen Construction Company, Tom
   
Total Quality Management Services, LLC
  Delaware
Trans Tech Electric, L.P.
  Texas
      Trans Tech Electric, Limited Partnership
   
Trawick Construction Company, Inc.
  Florida
TTGP, Inc.
  Delaware
TTLP, Inc.
  Delaware
TTM, Inc.
  North Carolina
Underground Construction Co., Inc.
  Delaware
      Delaware Underground Construction Co.
   
      Maryland Underground Construction Co., Inc.
   
      Underground Construction Co., Inc. (Delaware)
   
Utility Line Management Services, Inc.
  Delaware

 


 

     
Subsidiary/Doing Business As   State of Incorporation/Organization
 
   
Utility Locate & Mapping Services, Inc.
  Virginia
VCI Telcom, Inc.
  Delaware
VCS Sub, Inc.
  California
W.C. Communications, Inc.
  Delaware
      West Coast Communications