#### **EXHIBIT 21**

####  

Washington Group International, Inc.Subsidiaries

 
| **Company Name**                                            | ** ** | **Jurisdiction** | ** ** |
|-------------------------------------------------------------|------------|------------------|------------|
| 21st Century  Rail Corporation                              |       | Delaware         |       |
| Albany  Cogeneration Associates L.P.                        |       | Delaware         |       |
| Badger  Energy, Inc.                                        |       | Delaware         |       |
| Badger  Middle East, Inc.                                   |       | Delaware         |       |
| Badger-SMAS  Ltd.                                           |       | Saudi Arabia     |       |
| Broadway  Insurance Company, Ltd.                           |       | Bermuda          |       |
| Cascadia  Monorail Company LLC                              |       | Delaware         |       |
| 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         |       |
| Harbert-Yeargin  Inc.                                       |       | Delaware         |       |
| Mibrag B.V                                                  |       | Netherlands      |       |
| Middle East  Holdings Limited                               |       | Colorado         |       |
| Mitteldeutsche  Braunkohlengesellschaft mbH                 |       | Germany          |       |
| MK Aviation  Services, Inc.                                 |       | Nevada           |       |
| MK Engineers  and Contractors, S.A. de C.V                  |       | Mexico           |       |
| MK-Ferguson  Engineering Company                            |       | Michigan         |       |
| MK Nevada  LLC                                              |       | Nevada           |       |
| MKF  Facilities Management Ltd.                             |       | Ireland          |       |
| MKK Leasing  General Partnership                            |       | Nevada           |       |
| Morrison  Knudsen Engenharia, S.A.                          |       | Brazil           |       |
| Morrison  Knudsen Fort Knox Project Limited, LLC            |       | Ohio             |       |
| Morrison  Knudsen Leasing Corporation                       |       | Nevada           |       |
| Morrison  Knudsen MISR LLC, a Limited Liability Company     |       | Egypt            |       |
| Morrison  Knudsen Peru Sociedad de Responsabilidad Limitada |       | Peru             |       |

 

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| **Company Name**                                      | ** ** | **Jurisdiction** | ** ** |
|-------------------------------------------------------|------------|------------------|------------|
| Morrison  Knudsen Peru Services S.A.                  |       | Peru             |       |
| Morrison  Knudsen Venezuela S.A.                      |       | Venezuela        |       |
| National  Projects, Inc.                              |       | Nevada           |       |
| Parkway  Group LLC                                    |       | Georgia          |       |
| Platte River  Constructors Ltd.                       |       | Colorado         |       |
| Pomeroy  Corporation                                  |       | California       |       |
| PT Morrison  Knudsen Indonesia                        |       | Indonesia        |       |
| Raytheon-Ebasco  Overseas Ltd.                        |       | Delaware.        |       |
| Raytheon  Engineers & Constructors Germany GmbH   |       | Germany          |       |
| Raytheon  Engineers & Constructors Italy SRL      |       | Italy            |       |
| Raytheon  Engineers & Constructors Mauritius Ltd. |       | Mauritius        |       |
| Rocky  Mountain Remediation Services LLC              |       | Colorado         |       |
| Rust  Constructors Inc.                               |       | Delaware         |       |
| Rust  Constructors Puerto Rico, Inc.                  |       | Nevada           |       |
| SBG-Rust                                              |       | Saudi Arabia     |       |
| Shanghai  Ebasco - ECEPDI Engineering Corporation     |       | Rep. of China    |       |
| The Steam  Generating Team LLC                        |       | Ohio             |       |
| United  Engineers Far East, Ltd.                      |       | Delaware         |       |
| United  Engineers International, Inc.                 |       | Pennsylvania     |       |
| United  Mid-East, Inc.                                |       | Delaware         |       |
| UME/SMAS  LTD.                                        |       | Saudi Arabia     |       |
| WGCI, Inc.                                            |       | Delaware         |       |
| WGI Asia,  Inc.                                       |       | Delaware         |       |
| WGI Asia  Pacific Pte. Ltd.                           |       | Singapore        |       |
| WGI  Industrial Services, Ltd.                        |       | Ohio             |       |
| WGI Middle  East Inc.                                 |       | Nevada           |       |
| WGI  Netherlands B.V.                                 |       | Netherlands      |       |
| Washington  Architects, LLC                           |       | Delaware         |       |
| Washington-Catalytic,  Inc.                           |       | Delaware         |       |
| Washington  Closure LLC                               |       | Delaware         |       |

 

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| **Company Name**                                                              | ** ** | **Jurisdiction**    |   |
|-------------------------------------------------------------------------------|------------|---------------------|--------|
| Washington  Closure Company LLC                                               |       | Washington          |   |
| Washington  Construction Corporation                                          |       | Montana             |   |
| Washington  Demilitarization Company                                          |       | Delaware            |   |
| Washington E  & C Limited                                                 |       | England & Wales |   |
| Washington E  & C Romania S.R.L.                                          |       | Romania             |   |
| 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                                               |       | England & Wales |   |
| Washington-Framatome  ANP DE&S Decontamination & Decommissioning, LLC |       | New Mexico          |   |
| Washington  Group Argentina, Inc.                                             |       | Nevada              |   |
| Washington  Group Bolivia S.R.L.                                              |       | Bolivia             |   |
| Washington  Group BWXT Operating Services, LLC                                |       | Delaware            |   |
| Washington  Group Deutschland GmbH                                            |       | Germany             |   |
| Washington  Group Engineering Consulting (Shanghai) Company Ltd.              |       | China               |   |
| Washington  Group Industrial GmbH                                             |       | Germany             |   |
| Washington  Group International do Brasil Ltda.                               |       | Brazil              |   |
| Washington  Group International Hungary Kft                                   |       | Hungary             |   |
| Washington  Group International, Inc.                                         |       | Ohio                |   |
| Washington  Group International Trading (Shanghai) Co. Ltd.                   |       | China               |   |
| Washington  Group Ireland Ltd.                                                |       | Delaware            |   |
| Washington  Group Latin America, Inc.                                         |       | Delaware            |   |
| Washington  Group (Malaysia) Sdn Bhd                                          |       | Malaysia            |   |
| 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            |   |

 

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| **Company Name**                                              | ** ** | **Jurisdiction**    |   |
|---------------------------------------------------------------|------------|---------------------|--------|
| Washington  International B.V.                                |       | Netherlands         |   |
| Washington  International Holding Limited                     |       | England & Wales |   |
| Washington  International, Inc.                               |       | Nevada corp.        |   |
| Washington  International, LLC                                |       | Delaware            |   |
| Washington  Senggara Sdn Bhd                                  |       | Malaysia            |   |
| Washington  Zander Global Services GmbH                       |       | Germany             |   |
| Washington  Midwest LLC                                       |       | Ohio                |   |
| Washington Ohio  Services, LLC                                |       | Nevada              |   |
| Washington  Quality Inspection Company                        |       | Delaware            |   |
| Washington  Quality Programs Company                          |       | Delaware            |   |
| Washington  Services (Thailand) Ltd.                          |       | Thailand            |   |
| Washington/SNC-Lavalin  LLC                                   |       | Delaware            |   |
| Washington  Transportation Partners Limited Liability Company |       | Washington          |   |
| Westinghouse  Government Services Company LLC                 |       | Delaware            |   |
| Westinghouse  Government Environmental Services Company LLC   |       | Delaware            |   |
| Safe Sites  of Colorado LLC                                   |       | Delaware            |   |
| THOR  Treatment Technologies, LLC                             |       | Delaware            |   |
| Washington  TRU Solutions LLC                                 |       | New Mexico          |   |
| West Valley  Nuclear Services Company LLC                     |       | Delaware            |   |
| Westinghouse  Savannah River Company LLC                      |       | Delaware            |   |
| Washington  Safety Management Solutions LLC                   |       | Delaware            |   |
| WSMS  Mid-America LLC                                         |       | Delaware            |   |
| WSMS-MK LLC                                                   |       | Tennessee           |   |
| Wisconsin  Power Constructors, LLC                            |       | Wisconsin           |   |
| W.Z.S  Limited                                                |       | England & Wales |   |
| Yampa Mining  Co.                                             |       | Nevada              |   |

 

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*****Owned by PuertoRico-licensed engineer employee for the benefit of Washington GroupInternational.

 

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