EXHIBIT 21.1 THE SHAW GROUP INC.(R) AND ITS SUBSIDIARIES AND AFFILIATES (UPDATED AS OF OCTOBER 9, 2003) 1. ACL Piping, Inc. 2. Aiton & Co Limited 3. American Eagle Communities, L.L.C. 4. American Eagle Communities - Hawaii, L.L.C. 5. American Eagle Communities Midwest, L.L.C. 6. American Plastic Pipe and Supply, L.L.C. 7. Amikwiche Construction Itee 8. Arlington Avenue E Venture, LLC 9. Associated Valve, Inc. 10. Badger Licensing LLC 11. Badger Technologies, L.L.C. 12. Badger Technology Holdings, L.L.C. 13. Beaulieu Coutu Belanger et Associes Inc. 14. Bellefontaine Gas Producers, LLC 15. Bellefontaine Leachate Services, L.L.C. 16. Benicia North Gateway II, L.L.C. 17. B.F. Shaw, Inc. 18. Bureau d'Evaluation Beaulieu Coutu et Associes Inc. 19. Camden Road Venture, LLC 20. Canora Asia Inc. 21. Canora Brunei Environment Ltd. 22. C.B.P. Engineering Corp. 23. Chimento Wetlands, L.L.C. 24. CIC Environmental Services 25. Clean Horizons, LLC 26. Cojafex B.V. 27. Consortium BPA/Roche Inc. 28. Consortium Cegertech-GCS Inc. 29. Consortium GLD-Roche Inc. 30. Disaster Response Solutions, L.L.C. 31. Eagle Industries, Inc. 32. EMCON/OWT, Inc. 33. EntergyShaw, L.L.C. 34. EntergyShaw General Management, LLC 35. EntergyShaw Investments of Nevada, LLC 36. EntergyShaw Investments of Texas, LLC 37. EntergyShaw Project Management, L.P. 38. Envirogen, Inc. 39. Evimbec Itee 40. Field Services Canada Inc. 41. Field Services, Inc. 42. Gestion TDA Inc. 43. Great Southwest Parkway Venture, LLC 44. Groupe conseil Forchemex Itee 45. Groupe conseil Roche Atlantique Inc. 46. Groupe-conseil TDA Inc. 47. Gulf Coast Equipment Rental, Inc. 48. HL Newhall II, L.L.C. 49. Holdings Manufacturas Shaw South America, C.A. 50. Hydro Power Solutions LLC 51. IRM/NAPTech Joint Venture, L.L.C. 52. IT Holdings Canada, Inc. 53. IT UK Environmental & Infrastructure 54. Jernee Mill Road, L.L.C. 55. JSC International, Ltd. 56. Kato Road II, L.L.C. 57. KIP I, L.L.C. 58. LandBank Baker, L.L.C. 59. LandBank Properties, L.L.C. 60. Les Consultants Roche-Deluc Itee 61. Les Impressions Integrales Inc. 62. LFG Specialties, L.L.C. 63. Little Rock Military Communities, L.L.C. 64. Lone Star Fabricators, Inc. 65. Manufacturas Shaw South America, C.A. 66. Metuchen I, LLC 67. Millstone River Wetland Services, L.L.C. 68. Mississippi Space Services, LLC 69. MWR, Inc. 70. Nortec Construction 71. Northeast Plaza Venture I, LLC 72. Norwood Venture I, L.L.C. 73. Nouvelle Technologie (Tekno) Inc. 74. Ontario Ventures I, LLC 75. Otay Mesa Ventures II, L.L.C. 76. Pacific Support Group LLC 77. PBPAC Alberta 78. PFH Management, LLC 79. Pipework Engineering and Developments Limited 80. Plattsburg Venture, L.L.C. 81. Pluritec Itee 82. Poly-Energie Inc. 83. Power Technologies Asia-Pacific Sdn. Bhd. 84. Prospect Industries (Holdings), Inc. 85. 9080-1499 Quebec Inc. 86. 9092-8573 Quebec Inc. 87. 9093-8242 Quebec Inc. 88. Raritan Venture I, L.L.C. 89. Reseau ECI Inc. 90. Roche Construction Inc. 91. Roche International Inc. 92. Roche Invest SA 93. Roche IT Chile Ltda 94. Roche IT Peru Ltda 95. Roche Ltd., Consulting Group 96. Roche Maloney Desmeules 97. Roche USA Ltd. 98. Rosaire Despres & Associes Inc. 99. SAON Properties, Inc. 100. Satellite Beach Partners, LLC 101. S C Woods, L.L.C. 102. S.E.C. du 585 Charest 103. S.E.C. Sainte-Helene 104. Secorp, Inc. 105. Shaw A/DE, Inc. 106. Shaw Aiton Australia Pty Limited 107. Shaw Alloy Piping Products, Inc. 108. Shaw Asia Company, Limited 109. Shaw Beneco, Inc. 110. Shaw California, L.L.C. 111. Shaw Capital, Inc. 112. Shaw Caribbean (Cayman), Ltd. 113. Shaw CMS, Inc. 114. Shaw Coastal, Inc. 115. Shaw Connex, Inc. 116. Shaw Constructors, Inc. 117. Shaw Dunn Limited 118. Shaw E & I International Ltd. 119. Shaw E & I Investment Holdings, Inc. 120. Shaw E & I Russia, Inc. 121. Shaw Energy Services, Inc. 122. Shaw Environmental, Inc. 123. Shaw Environmental & Infrastructure, Inc. 124. Shaw Environmental Liability Solutions, L.L.C. 125. Shaw Export Company, S. de R. L. de C.V. 126. Shaw Fabricators, Inc. 127. Shaw Facilities, Inc. 128. Shaw Field Services, Inc. 129. Shaw Fronek Company (FCI), Inc. 130. Shaw Fronek Power Services, Inc. 131. Shaw FVF, Inc. 132. Shaw Global Energy Services, Inc. 133. Shaw Group UK Holdings Limited 134. Shaw Group UK Limited 135. Shaw GRP of California 136. Shaw Heat Treating Service, C.A. 137. Shaw Industrial Supply Co., Inc. 138. Shaw Infrastructure, Inc. 139. Shaw Intellectual Property Holdings, Inc. 140. Shaw International, Inc. 141. Shaw International Management Services One, Inc. 142. Shaw International Management Services Two, Inc. 143. Shaw JV Holdings, L.L.C 144. Shaw-Khudhairy-Dyncorp-Wood, L.L.C. 145. Shaw Lancas, C.A. 146. Shaw Maintenance, Inc. 147. Shaw Managed Services, Inc. 148. Shaw Management Services One, Inc. 149. Shaw Management Services Six, Inc. 150. Shaw Manufacturing and Services, Inc. 151. Shaw Manpower, S. de R.L. de C.V. 152. Shaw Mexican Holdings, S. de R.L. de C.V. 153. Shaw NAPTech, Inc. 154. Shaw Nass Middle East, W.L.L. 155. Shaw Overseas (Far East) Ltd. 156. Shaw Overseas (Middle East) Ltd. 157. Shaw Pipe Shields, Inc. 158. Shaw Pipe Supports, Inc. 159. Shaw Power Services Group, L.L.C. 160. Shaw Power Services, Inc. 161. Shaw Power Technologies, Inc.(TM) (formerly Power Technologies, Inc.(R)) 162. Shaw Power Technologies International Limited(TM) 163. Shaw Process and Industrial Group, Inc. 164. Shaw Process Fabricators, Inc. 165. Shaw Property Holdings, Inc. 166. Shaw Remediation Services, L.L.C. 167. Shaw Services, L.L.C. 168. Shaw SSS Fabricators, Inc. 169. Shaw Stone & Webster Puerto Rico, Inc. 170. Shaw Sunland Fabricators, Inc. 171. Shaw Trading FSC, Ltd. 172. Shaw Waste Solutions, LLC 173. Shaw Word Industries Fabricators, Inc. 174. Shaw-YPC Piping (Nanjing) Co., Ltd. 175. Societe Energie conseil du Quebec Inc. 176. Societe Immobiliere Maizerets, SEC 177. Soderoc Developpement Itee 178. So-Glen Gas Co., LLC 179. Stone & Webster Asia, Inc. 180. Stone & Webster Canada Holding One (N.S.), ULC 181. Stone & Webster Canada Holding Two, Inc. 182. Stone & Webster Canada L.P. 183. Stone & Webster Construction, Inc. 184. Stone & Webster Construction Services, L.L.C. 185. Stone & Webster Consultants Limited 186. Stone & Webster Engineering Projects Private Limited 187. Stone & Webster Engineering Services Sdn. Bdh. 188. Stone & Webster Engineering (Thailand) Ltd. 189. Stone & Webster Holding One, Inc. 190. Stone & Webster Holding Two, Inc. 191. Stone & Webster, Inc. 192. Stone & Webster Insaat ve Muhendislik Limited Sirketi 193. Stone & Webster International B.V. 194. Stone & Webster International, Inc. 195. Stone & Webster International Holdings, Inc. 196. Stone & Webster - JSC Management Consultants, Inc. 197. Stone & Webster Limited 198. Stone & Webster Management Consultants, Inc. 199. Stone & Webster Massachusetts, Inc. 200. Stone & Webster Michigan, Inc. 201. Stone & Webster Purchasing, Inc. 202. Stone & Webster Process Technologies B.V. 203. Stone & Webster Process Technology, Inc. 204. Stone & Webster Services, L.L.C. 205. Sugar Acquisition (NVDIP), Inc. 206. SWINC Acquisition Five, L.L.C. 207. Techanna 208. The LandBank Group, Inc. 209. The Shaw Group Inc.(R) 210. The Shaw Group Inc. Political Action Committee, Inc. 211. The Shaw Group International Inc. 212. The Shaw Group UK Pension Plan Limited 213. The Shaw Group UK 1997 Pension Scheme Limited 214. The Shaw Group UK 2001 Pension Plan Limited 215. Whessoe Piping Systems Limited 216. Whippany Venture I, L.L.C. 217. World Industrial Constructors, Inc. 218. Worldwide Industrial Constructors, Inc. UPDATED AS OF OCTOBER 9, 2003: SHAW DOMESTIC ENTITIES: 56 STONE & WEBSTER DOMESTIC ENTITIES: 24 SHAW E&I DOMESTIC ENTITIES: 53 ALL FOREIGN ENTITIES: 85 TOTAL NUMBER OF ALL (DOMESTIC AND FOREIGN) SHAW RELATED ENTITIES: 218