**EXHIBIT 21**

 

Washington Group International,Inc. Subsidiaries

 

 
| **Company Name**                            |   | **Jurisdiction** |   |
|---------------------------------------------|--------|------------------|--------|
|                                        |   |             |   |
| 21st Century Rail Corporation               |   | Delaware         |   |
|                                        |   |             |   |
| Albany Cogeneration Associates L.P.         |   | Delaware         |   |
|                                        |   |             |   |
| Asia Badger, Inc.                           |   | Delaware         |   |
|                                        |   |             |   |
| Badger Energy, Inc.                         |   | Delaware         |   |
|                                        |   |             |   |
| Badger Middle East, Inc.                    |   | Delaware         |   |
|                                        |   |             |   |
| Badger-SMAS Ltd.                            |   | Saudi Arabia     |   |
|                                        |   |             |   |
| Broadway Insurance Company, Ltd.            |   | Bermuda          |   |
|                                        |   |             |   |
| Catalytic Servicios, C.A.                   |   | Venezuela        |   |
|                                        |   |             |   |
| Constructora MK de Mexico, S.A. de C.V.     |   | Mexico           |   |
|                                        |   |             |   |
| Dulles Transit Partners, LLC                |   | Virginia         |   |
|                                        |   |             |   |
| Ebasco International Corporation            |   | Delaware         |   |
|                                        |   |             |   |
| Energy Overseas International, Inc.         |   | Delaware         |   |
|                                        |   |             |   |
| Grupo Internacional Coahuila, S.A. de C.V.  |   | Mexico           |   |
|                                        |   |             |   |
| Harbert-Yeargin Inc.                        |   | Delaware         |   |
|                                        |   |             |   |
| McBride-Ratcliff and Associates, Inc.       |   | Texas            |   |
|                                        |   |             |   |
| Mibrag B.V                                  |   | Netherlands      |   |
|                                        |   |             |   |
| Middle East Holdings Limited                |   | Colorado         |   |
|                                        |   |             |   |
| Mitteldeutsche Braunkohlengesellschaft GmbH |   | Germany          |   |
|                                        |   |             |   |
| MK Aviation Services, Inc.                  |   | Nevada           |   |
|                                        |   |             |   |
| MK Capital Company                          |   | Nevada           |   |
|                                        |   |             |   |
| MK Engineers and Contractors, S.A. de C.V   |   | Mexico           |   |
|                                        |   |             |   |
| MK Nevada LLC                               |   | Nevada           |   |
|                                        |   |             |   |
| MKF Facilities Management Ltd.              |   | Ireland          |   |
|                                        |   |             |   |
| MK-Ferguson Engineering Company             |   | Michigan         |   |
|                                        |   |             |   |
| MK-Ferguson of Oak Ridge Company            |   | Tennessee        |   |
|                                        |   |             |   |
| MKK Leasing General Partnership             |   | Nevada           |   |
|                                        |   |             |   |
| Morrison Knudsen Deutschland GmbH           |   | Germany          |   |
|                                        |   |             |   |
| Morrison Knudsen Engenharia, S.A.           |   | Brazil           |   |

 

----

 
| Morrison Knudsen Engineering Consulting (Shanghai) Company Ltd. |   | China          |   |
|-----------------------------------------------------------------|--------|----------------|--------|
|                                                            |   |           |   |
| Morrison Knudsen Fort Knox Project Limited, LLC                 |   | Ohio           |   |
|                                                            |   |           |   |
| Morrison Knudsen International Trading (Shanghai) Co. Ltd.      |   | China          |   |
|                                                            |   |           |   |
| Morrison Knudsen Leasing Corporation                            |   | Nevada         |   |
|                                                            |   |           |   |
| Morrison Knudsen MISR LLC, a Limited Liability Company          |   | Egypt          |   |
|                                                            |   |           |   |
| Morrison Knudsen Peru Services S.A.                             |   | Peru           |   |
|                                                            |   |           |   |
| Morrison Knudsen Peru Sociedad de Responsabilidad Limitada      |   | Peru           |   |
|                                                            |   |           |   |
| Morrison Knudsen Umwelt GmbH                                    |   | Germany        |   |
|                                                            |   |           |   |
| Morrison Knudsen Venezuela S.A.                                 |   | Venezuela      |   |
|                                                            |   |           |   |
| National Projects, Inc.                                         |   | Nevada         |   |
|                                                            |   |           |   |
| Platte River Constructors Ltd.                                  |   | Colorado       |   |
|                                                            |   |           |   |
| Pomeroy Corporation                                             |   | California     |   |
|                                                            |   |           |   |
| PT Morrison Knudsen Indonesia                                   |   | Indonesia      |   |
|                                                            |   |           |   |
| Raytheon-Ebasco Overseas Ltd.                                   |   | Delaware.      |   |
|                                                            |   |           |   |
| Rocky Mountain Remediation Services LLC                         |   | Colorado       |   |
|                                                            |   |           |   |
| Rust Constructors Puerto Rico, Inc.                             |   | Nevada         |   |
|                                                            |   |           |   |
| Rust Constructors, Inc.                                         |   | Delaware       |   |
|                                                            |   |           |   |
| Safe Sites of Colorado LLC                                      |   | Delaware       |   |
|                                                            |   |           |   |
| SBG-Rust                                                        |   | Saudi Arabia   |   |
|                                                            |   |           |   |
| SGT LTD.                                                        |   | Ohio           |   |
|                                                            |   |           |   |
| Shanghai Ebasco - ECEPDI Engineering Co. Ltd.                   |   | Rep. of China  |   |
|                                                            |   |           |   |
| Specialty Technical Services, Inc.                              |   | Pennsylvania.  |   |
|                                                            |   |           |   |
| THOR Treatment Technologies, LLC                                |   | Delaware       |   |
|                                                            |   |           |   |
| UME/SMAS LTD.                                                   |   | Saudi Arabia   |   |
|                                                            |   |           |   |
| United Engineers Far East, Ltd.                                 |   | Delaware       |   |
|                                                            |   |           |   |
| United Engineers International, Inc.                            |   | Pennsylvania   |   |
|                                                            |   |           |   |
| United Mid-East, Inc.                                           |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Architects, LLC                                      |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Closure Company LLC                                  |   | Washington     |   |
|                                                            |   |           |   |
| Washington Construction Corporation                             |   | Montana        |   |
|                                                            |   |           |   |
| Washington Demilitarization Company                             |   | Delaware       |   |
|                                                            |   |           |   |
| Washington E & C Limited                                    |   | United Kingdom |   |

 

----

 
| Washington Earth Tech Disposal Cell (WEDC) LLC                  |   | Tennessee      |   |
|-----------------------------------------------------------------|--------|----------------|--------|
|                                                            |   |           |   |
| Washington Electrical, Inc.                                     |   | Nevada         |   |
|                                                            |   |           |   |
| Washington Engineering Quality Services Corporation             |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Engineers PSC                                        |   | Puerto Rico    |   |
|                                                            |   |           |   |
| Washington FM Holdings Limited                                  |   | U.K.           |   |
|                                                            |   |           |   |
| Washington Group BWXT Operating Services, LLC                   |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Group (Malaysia) Sdn Bhd                             |   | Malaysia       |   |
|                                                            |   |           |   |
| Washington Group Industrial GmbH                                |   | Germany        |   |
|                                                            |   |           |   |
| Washington Group Integrated Services of Northern New Mexico LLC |   | New Mexico     |   |
|                                                            |   |           |   |
| Washington Group International do Brasil Ltda.                  |   | Brazil         |   |
|                                                            |   |           |   |
| Washington Group International Hungary Kft                      |   | Hungary        |   |
|                                                            |   |           |   |
| Washington Group International, Inc.                            |   | Ohio           |   |
|                                                            |   |           |   |
| Washington Group Ireland Ltd.                                   |   | Delaware.      |   |
|                                                            |   |           |   |
| Washington Group Latin America, Inc                             |   | Delaware.      |   |
|                                                            |   |           |   |
| Washington Group Northern Ltd.                                  |   | Canada         |   |
|                                                            |   |           |   |
| Washington Group Polska Sp.zo.o.                                |   | Poland         |   |
|                                                            |   |           |   |
| Washington Group Romania S.R.L.                                 |   | Romania        |   |
|                                                            |   |           |   |
| Washington Infrastructure Corporation                           |   | New York       |   |
|                                                            |   |           |   |
| Washington Infrastructure Services, Inc*.*                      |   | Colorado       |   |
|                                                            |   |           |   |
| Washington International Holding Limited                        |   | United Kingdom |   |
|                                                            |   |           |   |
| Washington International, Inc.                                  |   | Nevada         |   |
|                                                            |   |           |   |
| Washington International, LLC                                   |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Midwest LLC                                          |   | Ohio           |   |
|                                                            |   |           |   |
| Washington Ohio Services, LLC                                   |   | Nevada         |   |
|                                                            |   |           |   |
| Washington Quality Inspection Company                           |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Quality Programs Company                             |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Safety Management Solutions LLC                      |   | Delaware       |   |
|                                                            |   |           |   |
| Washington Services (Thailand) Ltd.                             |   | Thailand       |   |
|                                                            |   |           |   |
| Washington Transportation Partners Limited Liability Company    |   | Washington     |   |
|                                                            |   |           |   |
| Washington TRU Solutions LLC                                    |   | New Mexico     |   |
|                                                            |   |           |   |
| Washington/SNC-Lavalin LLC                                      |   | Delaware       |   |
|                                                            |   |           |   |
| Washington-Catalytic, Inc.                                      |   | Delaware       |   |

 

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| Washington-Framatome ANP DE&S Decontamination &  Decommissioning, LLC |   | New Mexico  |   |
|-------------------------------------------------------------------------------|--------|-------------|--------|
|                                                                          |   |        |   |
| West Valley Nuclear Services Company LLC                                      |   | Delaware    |   |
|                                                                          |   |        |   |
| Westinghouse Government Environmental Services Company LLC                    |   | Delaware    |   |
|                                                                          |   |        |   |
| Westinghouse Government Services Company LLC                                  |   | Delaware    |   |
|                                                                          |   |        |   |
| Westinghouse Savannah River Company LLC                                       |   | Delaware    |   |
|                                                                          |   |        |   |
| WGCI, Inc.                                                                    |   | Delaware    |   |
|                                                                          |   |        |   |
| WGI Asia Pacific Pte. Ltd.                                                    |   | Singapore   |   |
|                                                                          |   |        |   |
| WGI Industrial Services, Ltd.                                                 |   | Ohio        |   |
|                                                                          |   |        |   |
| WGI Middle East                                                               |   | Nevada      |   |
|                                                                          |   |        |   |
| WGI Netherlands B.V.                                                          |   | Netherlands |   |
|                                                                          |   |        |   |
| Wisconsin Power Constructors, LLC                                             |   | Wisconsin   |   |
|                                                                          |   |        |   |
| WSMS Mid-America LLC                                                          |   | Delaware    |   |
|                                                                          |   |        |   |
| WSMS-MK LLC                                                                   |   | Tennessee   |   |
|                                                                          |   |        |   |
| W.Z.S. Limited                                                                |   | U.K.        |   |
|                                                                          |   |        |   |
| Yampa Mining Co.                                                              |   | Nevada      |   |

 

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