## **EXHIBIT 21**

 

## **WGISubsidiaries**

 
| **Company Name**                            |   | **Jurisdiction** |
|---------------------------------------------|--------|------------------|
| 21st Century Rail Corporation               |   | Delaware         |
|                                        |   |             |
| Albany Cogeneration Associates L.P.         |   | Delaware         |
|                                        |   |             |
| Asia Badger, Inc.                           |   | Delaware         |
|                                        |   |             |
| Badger Energy, 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         |
|                                        |   |             |
| Industrial Constructors Corp.               |   | Montana          |
|                                        |   |             |
| 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 do Brasil Ltda.            |   | Brazil           |

 

----

 
| 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 Overseas PTE LTD                               |   | Singapore     |
|                                                            |   |          |
| 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        |
|                                                            |   |          |
| Northern Construction Company Ltd.                              |   | Canada        |
|                                                            |   |          |
| 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  |
|                                                            |   |          |
| Secore, LLC                                                     |   | Georgia       |
|                                                            |   |          |
| 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  |
|                                                            |   |          |
| Union County Rail, LLC                                          |   | New Jersey    |
|                                                            |   |          |
| United Engineers Far East, Ltd.                                 |   | Delaware      |
|                                                            |   |          |
| United Engineers International, Inc.                            |   | Pennsylvania  |
|                                                            |   |          |
| United Mid-East, Inc.                                           |   | Delaware      |

 

2

----

 
| Washington Architects, LLC                                      |   | Delaware       |
|-----------------------------------------------------------------|--------|----------------|
|                                                            |   |           |
| Washington Closure Company LLC                                  |   | Washington     |
|                                                            |   |           |
| Washington Construction Corporation                             |   | Montana        |
|                                                            |   |           |
| Washington Contractors Group, Inc.                              |   | Montana        |
|                                                            |   |           |
| Washington Demilitarization Company                             |   | Delaware       |
|                                                            |   |           |
| Washington E & C Limited                                    |   | United Kingdom |
|                                                            |   |           |
| Washington Electrical, Inc.                                     |   | Nevada         |
|                                                            |   |           |
| Washington Engineering Quality Services Corporation             |   | Delaware       |
|                                                            |   |           |
| Washington Engineers PSC                                        |   | Puerto Rico    |
|                                                            |   |           |
| 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 Hungary Kft                      |   | Hungary        |
|                                                            |   |           |
| Washington Group International, Inc.                            |   | Ohio           |
|                                                            |   |           |
| Washington Group Ireland Ltd.                                   |   | Delaware.      |
|                                                            |   |           |
| Washington Group Latin America, Inc                             |   | Delaware.      |
|                                                            |   |           |
| 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 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       |

 

3

----

 
| Washington-Framatome ANP DE&S Decontamination &  Decommissioning, LLC |   | New Mexico  |
|-------------------------------------------------------------------------------|--------|-------------|
|                                                                          |   |        |
| WCG Holdings, Inc.                                                            |   | Montana     |
|                                                                          |   |        |
| WCG Leasing, Inc.                                                             |   | Montana     |
|                                                                          |   |        |
| West Valley Nuclear Services Company LLC                                      |   | Delaware    |
|                                                                          |   |        |
| Westinghouse Government Environmental Services Company LLC                    |   | Delaware    |
|                                                                          |   |        |
| Westinghouse Government Services Company LLC                                  |   | Delaware    |
|                                                                          |   |        |
| Westinghouse KAPL LLC                                                         |   | Delaware    |
|                                                                          |   |        |
| Westinghouse Safety Management Solutions LLC                                  |   | Delaware    |
|                                                                          |   |        |
| Westinghouse Savannah River Company LLC                                       |   | Delaware    |
|                                                                          |   |        |
| WGCI, Inc.                                                                    |   | Delaware    |
|                                                                          |   |        |
| WGI Industrial Services, Ltd.                                                 |   | Ohio        |
|                                                                          |   |        |
| WGI Netherlands B.V.                                                          |   | Netherlands |
|                                                                          |   |        |
| WGI Middle East                                                               |   | Nevada      |
|                                                                          |   |        |
| WGNH Acquisition, L.L.C.                                                      |   | Delaware    |
|                                                                          |   |        |
| Wisconsin Power Constructors, LLC                                             |   | Wisconsin   |
|                                                                          |   |        |
| WME, Inc.                                                                     |   | Delaware    |
|                                                                          |   |        |
| WSMS Mid-America LLC                                                          |   | Delaware    |
|                                                                          |   |        |
| WSMS-MK LLC                                                                   |   | Tennessee   |
|                                                                          |   |        |
| Yampa Mining Co.                                                              |   | Nevada      |

 

4

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