EXHIBIT 21



LIST OF SUBSIDIARIES



The following is a list of certain subsidiaries (greater than 50% owned) of the registrant and their respective states or countries of incorporation:



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|1780, LLC (Delaware)                                                 |  | Copiah Storage, LLC (Delaware)                                     
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|280464 Ontario Limited (Canada (Ontario))                            |  | Cornerstone Plaza, LLC (Florida)                                   
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|Advance SC LLC (South Carolina)                                      |  | Cougar Acquisition Corp. (Delaware)                                
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|Aguaytia Energy del Peru S.R. Ltda (Peru)                            |  | Coyanosa Gas Plant, Gathering and Wolfcamp Unit JV                 
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|Algonquin Gas Transmission, LLC (Delaware)                           |  | Crescent/Arizona (North Carolina)                                  
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|American Natural Gas Corporation (Colorado)                          |  | Crescent/Georgia (Georgia)                                         
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|Associated Louisiana Intrastate Pipe Line, LLC (Delaware)            |  | Crescent/RGI Capital, LLC (North Carolina)                         
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|Ballantyne Properties, LLC (North Carolina)                          |  | Crescent Bartram Park, LLC (Florida)                               
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|Bartram Lakes, LLC (Delaware)                                        |  | Crescent Commonwealth Center, LLC (Delaware)                       
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|Beaver Gas Services LLC (Delaware)                                   |  | Crescent Communities N.C., LLC (Delaware)                          
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|Belfort 36, LLC (Delaware)                                           |  | Crescent Communities Realty, LLC (North Carolina)                  
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|Belfort Developers, LLC (Delaware)                                   |  | Crescent Communities S.C., LLC (Delaware)                          
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|Bison Insurance Company Limited (Bermuda)                            |  | Crescent Land & Timber, LLC (Delaware)                             
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|Black Forest on Lake James, LLC (Delaware)                           |  | Crescent Potomac Greens, LLC (Delaware)                            
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|Bridgeport Energy LLC (Delaware)                                     |  | Crescent Potomac Plaza, LLC (Delaware)                             
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|Bridgewater Lakeland Developers, LLC (Delaware)                      |  | Crescent Potomac Properties, LLC (Delaware)                        
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|Brookeland Plant and Gathering System JV                             |  | Crescent Potomac Yard, LLC (Delaware)                              
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|Brookeland Residue Redelivery Facility                               |  | Crescent Potomac Yard Development, LLC (Delaware)                  
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|Caldwell Power Company (North Carolina)                              |  | Crescent Realty, LLC (North Carolina)                              
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|Camp Lake James, LLC (Delaware)                                      |  | Crescent Realty Advisors, LLC (Delaware)                           
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|Carolina Centers, LLC [a Delaware LLC] (Delaware)                    |  | Crescent Resources, LLC (Georgia)                                  
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|Carolina Centers, LLC [a North Carolina LLC] (North Carolina)        |  | Crescent Resources Marketing Services, LLC (Delaware)              
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|Casco Bay Energy Company, LLC (Delaware)                             |  | Crescent Resources Registration Services, LLC (Delaware)           
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|Catawba Manufacturing and Electric Power Company (North Carolina)    |  | Crescent River, LLC (Georgia)                                      
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|Cedar Lake, LLC (Delaware)                                           |  | Crescent Seminole, LLC (Florida)                                   
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|Centana Gathering, LLC (Delaware)                                    |  | Crescent Southeast Club, LLC (Delaware)                            
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|Centana Intrastate Pipeline, LP (Delaware)                           |  | Crescent Twin Creeks, LLC (North Carolina)                         
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|Centana Oil Gathering, LLC (Delaware)                                |  | Crescent Yacht Club, LLC f/k/a Peninsula Yacht Club, LLC (Delaware)
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|Centra Gas Toluca S. De R.L. De D.V. (Mexico)                        |  | Crockett NGL Pipeline JV                                           
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|Chambers County Land Company (Delaware)                              |  | CSCC Holdings Limited Partnership (Canada (British Columbia))      
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|Chaparral Pines Management, LLC (Arizona)                            |  | D/FD Bridgeport Operations, LLC (Delaware)                         
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|Charlotte Cotton Mill, LLC (North Carolina)                          |  | D/FD Cokenergy Operations, LLC (Delaware)                          
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|Claiborne Energy Services, Inc. (Louisiana)                          |  | D/FD Enterprises, LLC (Delaware)                                   
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|Clean Energy Genco, Inc. (Delaware)                                  |  | D/FD Equipment Company LLC (Delaware)                              
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|Clean Energy Partners Limited Partnership (Delaware)                 |  | D/FD Foreign Sales Corporation (Barbados)                          
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|Clean Water of NC, LLC (North Carolina)                              |  | D/FD Grays Harbor, LLC (Delaware)                                  
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|CLT Development, LLC (Delaware)                                      |  | D/FD International Services Brasil Ltda. (Brazil)                  
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|Club Capital, LLC (North Carolina)                                   |  | D/FD Kentucky (Delaware)                                           
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|Club Enterprises LLC (Delaware)                                      |  | D/FD Operating Services LLC (Delaware)                             
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|Colbert Lane Commercial, LLC (Delaware)                              |  | Dauphin Island Gathering Partners                                  
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|Comercializadora Duke Energy de Centro America, Limitada (Guatemala) |  | Dauphin Island Gathering System, LLC (Delaware)                    



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|DCP Assets Holding, LP (Delaware)                              |  | Duke/Fluor Daniel International (Nevada)                                      
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|DCP Assets Holdings GP, LLC (Delaware)                         |  | Duke/Fluor Daniel International Services (Nevada)                             
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|DCP Black Lake Holdings, LP (Delaware)                         |  | Duke/Fluor Daniel International Services (Trinidad) Ltd. (Trinidad And Tobago)
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|DCP LP Holdings, LP (Delaware)                                 |  | Duke/Fluor Daniel LLC (Nevada)                                                
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|DCP Midstream GP, LLC (Delaware)                               |  | Duke/Louis Dreyfus L.L.C. (Nevada)                                            
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|DCP Midstream GP, LP (Delaware)                                |  | Duke Bridgeport Energy, LLC (Delaware)                                        
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|DCP Midstream Operating, LLC (Delaware)                        |  | Duke Canada Ltd. (Alberta, Canada)                                            
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|DCP Midstream Operating, LP (Delaware)                         |  | Duke Capital LLC (Delaware)                                                   
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|Deer Acquisition Corp. (North Carolina)                        |  | Duke Capital Partners, LLC (Delaware)                                         
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|DE Fossil-Hydro Engineering, Inc. (North Carolina)             |  | Duke Communication Services, Inc. (North Carolina)                            
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|DEFS Anadarko Gathering, LP (Delaware)                         |  | Duke Communication Services Caribbean Ltd. (Bermuda)                          
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|DEFS Austin Gathering, LP (Delaware)                           |  | Duke Energy Administrative Services, Inc. (Delaware)                          
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|DEFS Canada Investments L.P. (Canada (Alberta))                |  | Duke Energy Allowance Management, LLC (Delaware)                              
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|DEFS Canada L.P. (Canada (Alberta))                            |  | Duke Energy Americas, LLC (Delaware)                                          
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|DEFS Holding, LLC (Delaware)                                   |  | Duke Energy Arlington Valley, LLC (Delaware)                                  
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|DEFS Holding 1, LLC (Delaware)                                 |  | Duke Energy Business Services LLC (Delaware)                                  
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|DEFS Industrial Gas, LLC (Delaware)                            |  | Duke Energy Canada Call Co. (Canada (Nova Scotia))                            
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|DEFS Interstate Pipeline, LP (Delaware)                        |  | Duke Energy Canada Exchangeco Inc. (Canada)                                   
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|DEFS Raptor Pipeline, LLC (Delaware)                           |  | Duke Energy Capital of Texas, Inc. (Delaware)                                 
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|DEFS Wyoming, LLC (Delaware)                                   |  | Duke Energy County Line, LLC (Delaware)                                       
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|DEGT Empress U.S. Corporation (Delaware)                       |  | Duke Energy Design Supplier, Inc. (Delaware)                                  
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|DEGT Midstream Holdings Corporation (Canada (Nova Scotia ULC)) |  | Duke Energy Development Pty Ltd (Australia)                                   
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|DEGT Midstream Holdings Partnership (Alberta, Canada)          |  | Duke Energy Egenor S. en C. por A. (Peru)                                     
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|DEGT Midstream Management Corporation (Canada (Nova Scotia))   |  | Duke Energy Electroquil Partners (Delaware)                                   
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|DEGT Midstream Partner Corporation (Canada (Nova Scotia ULC))  |  | Duke Energy Empress L.P. (Alberta, Canada)                                    
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|DEHLP Management Inc. (Canada)                                 |  | Duke Energy Empress Management Inc. (Canada)                                  
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|DE Marketing Canada Ltd. (Canadian Federal)                    |  | Duke Energy Enterprises Corporation (Delaware)                                
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|DENA Asset Partners, L.P. (Delaware)                           |  | Duke Energy Equipment Partners, L.P. (Delaware)                               
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|DENA Partners Holding, LLC (Delaware)                          |  | Duke Energy Facilities Holdings Partnership (Alberta, Canada)                 
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|DENA Texas Management, LLC (Delaware)                          |  | Duke Energy Facilities Inc. (Canada)                                          
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|DENA Trading Partners, L.P. (Delaware)                         |  | Duke Energy Facilities LP (Alberta, Canada)                                   
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|DE Nuclear Engineering, Inc. (North Carolina)                  |  | Duke Energy Facilities Management Inc. (Canada)                               
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|DE Operating Services, LLC (Delaware)                          |  | Duke Energy Fayette, LLC (Delaware)                                           
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|DE Power Generating, LLC (Delaware)                            |  | Duke Energy Field Services, LLC (Delaware)                                    
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|DETMI Management, Inc. (Colorado)                              |  | Duke Energy Field Services, LP (Delaware)                                     
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|DETM Marketing Northeast, LLC (Delaware)                       |  | Duke Energy Field Services Canada (Canada (Alberta))                          
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|DFD Operating Plant Services, LLC (Delaware)                   |  | Duke Energy Field Services Canada Holdings, Inc. (Delaware)                   
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|DFD Plant Services, LLC (Delaware)                             |  | Duke Energy Field Services Marketing, LP (Delaware)                           
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|Discovery Gas Transmission LLC (Delaware)                      |  | Duke Energy Finance Canada Limited Partnership (Alberta, Canada)              
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|Dixilyn-Field (Nigeria) Limited (Nigeria)                      |  | Duke Energy Financial Services, LP (Delaware)                                 
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|Dixilyn-Field Drilling Company (Delaware)                      |  | Duke Energy Fossil-Hydro, LLC (Delaware)                                      
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|Dixilyn-Field International Drilling Company, S.A. (Panama)    |  | Duke Energy Fossil-Hydro California (Delaware)                                
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|DTMSI Management Ltd. (Alberta, Canada)                        |  | Duke Energy Gas Services, LLC (Delaware)                                      
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|Duke/Fluor Daniel (North Carolina)                             |  | Duke Energy Gas Transmission, LLC (Delaware)                                  
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|Duke/Fluor Daniel Caribbean, S.E. (Puerto Rico)                |  | Duke Energy Gas Transmission Resources, Inc. (Delaware)                       
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|Duke/Fluor Daniel Development Services LLC (Nevada)            |  | Duke Energy Gas Transmission Resources, LLC (Delaware)                        



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|Duke Energy Gas Transmission Services, LLC (Delaware)                                             |  | Duke Energy International El Salvador Investments No. 1 S.A. de C.V. (El Salvador)           
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|Duke Energy Generating S.A. (Argentina)                                                           |  | Duke Energy International Espana Holdings, S.L. (Spain)                                      
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|Duke Energy Generation Services, LLC (Delaware)                                                   |  | Duke Energy International Finance (UK) Limited (United Kingdom)                              
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|Duke Energy Global Markets, Inc. (Nevada)                                                         |  | Duke Energy International Guatemala Holdings No. 1, Ltd. (Bermuda)                           
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|Duke Energy Greenleaf, LLC (Delaware)                                                             |  | Duke Energy International Guatemala Holdings No. 2, Ltd. (Bermuda)                           
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|Duke Energy Group, LLC (Delaware)                                                                 |  | Duke Energy International Guatemala Holdings No. 3 (Cayman Islands)                          
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|Duke Energy Group Holdings, LLC (Delaware)                                                        |  | Duke Energy International Guatemala Limitada (Guatemala)                                     
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|Duke Energy GS Funding Company (Delaware)                                                         |  | Duke Energy International Guatemala y Compania Sociedad en Comandita por Acciones (Guatemala)
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|Duke Energy Guadalupe Pipeline, LLC (Delaware)                                                    |  | Duke Energy International Investments No. 2 Ltd. (Bermuda)                                   
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|Duke Energy Guadalupe Pipeline Holdings, Inc. (Delaware)                                          |  | Duke Energy International Latin America, Ltd. (Bermuda)                                      
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|Duke Energy Hanging Rock, LLC (Delaware)                                                          |  | Duke Energy International Mexico, S.A. de C.V. (Mexico)                                      
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|Duke Energy Hinshaw Pipeline, LLC (Delaware)                                                      |  | Duke Energy International Netherlands Financial Services B.V. (Netherlands)                  
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|Duke Energy Holding Corp. (Delaware)                                                              |  | Duke Energy International Operaciones Guatemala Limitada (Guatemala)                         
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|Duke Energy Hydrocarbons Canada Limited Partnership (Canada)                                      |  | Duke Energy International Peru Inversiones No. 1, S.R.L. (Peru)                              
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|Duke Energy Hydrocarbons Investments Ltd. (Alberta, Canada)                                       |  | Duke Energy International Peru Investments No. 1, Ltd. (Bermuda)                             
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|Duke Energy Interamerican Holding Company LDC (Cayman Islands)                                    |  | Duke Energy International PJP (Ireland) Holdings (Ireland)                                   
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|Duke Energy International, Brasil Ltda. (Brazil)                                                  |  | Duke Energy International PJP Holdings, Ltd. (Bermuda)                                       
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|Duke Energy International, Geracao Paranapanema S.A. (Brazil)                                     |  | Duke Energy International PJP Holdings (Mauritius) Ltd. (Republic of Mauritius)              
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|Duke Energy International, Inc. (North Carolina)                                                  |  | Duke Energy International Pty Ltd (Australia)                                                
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|Duke Energy International, LLC (Delaware)                                                         |  | Duke Energy International Services (UK) Limited (United Kingdom)                             
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|Duke Energy International (Europe) GmbH (Germany)                                                 |  | Duke Energy International Southern Cone SRL (Argentina)                                      
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|Duke Energy International (Europe) Holdings ApS (Denmark)                                         |  | Duke Energy International Trading and Marketing (UK) Limited (United Kingdom)                
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|Duke Energy International (Europe) Limited (United Kingdom)                                       |  | Duke Energy International Transmission Guatemala Limitada (Guatemala)                        
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|Duke Energy International Acquisition Vehicle No. 6 Ltd. (Bermuda)                                |  | Duke Energy International Uruguay Holdings, LLC (Delaware)                                   
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|Duke Energy International Argentina Holdings (Cayman Islands)                                     |  | Duke Energy International Uruguay Investments, S.R.L. (Uruguay)                              
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|Duke Energy International Argentina Marketing/Trading (Bermuda) Ltd. (Bermuda)                    |  | Duke Energy Intrastate Network, L.L.C. (Delaware)                                            
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|Duke Energy International Asia Pacific Ltd. (Bermuda)                                             |  | Duke Energy Intrastate Pipeline, LLC (Delaware)                                              
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|Duke Energy International Bolivia Holdings No. 1, LLC (Delaware)                                  |  | Duke Energy Islander East Pipeline Company, L.L.C. (Delaware)                                
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|Duke Energy International Bolivia Investments No. 1 Limited (Cayman Islands)                      |  | Duke Energy Lantana, LLC (Delaware)                                                          
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|Duke Energy International Bolivia Investments No. 2 Limited (Cayman Islands)                      |  | Duke Energy Lavaca, Inc. (Delaware)                                                          
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|Duke Energy International Brasil Commercial, Ltda. (Brazil)                                       |  | Duke Energy Lee, LLC (Delaware)                                                              
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|Duke Energy International Brasil Holdings, LLC (Delaware)                                         |  | Duke Energy Lee Holding, Inc. (Delaware)                                                     
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|Duke Energy International del Ecuador Cia. Ltda. (Ecuador)                                        |  | Duke Energy LNG Sales, Inc. (Delaware)                                                       
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|Duke Energy International Electroquil Holdings, LLC (Delaware)                                    |  | Duke Energy Marketing America, LLC (Delaware)                                                
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|Duke Energy International El Salvador, S en C de CV (El Salvador)                                 |  | Duke Energy Marketing Canada Corp. (Delaware)                                                
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|Duke Energy International El Salvador Comercializadora de El Salvador, S.A. de C.V. (El Salvador) |  | Duke Energy Marketing Corp. (Nevada)                                                         
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|Duke Energy International El Salvador Investments No. 1 Ltd (Bermuda)                             |  | Duke Energy Marketing Limited Partnership (Alberta, Canada)                                  



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|Duke Energy Merchant Finance, LLC (Delaware)                                 |  | Duke Energy Washington, LLC (Delaware)                                             
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|Duke Energy Merchants, LLC (Delaware)                                        |  | Duke Energy Westheimer, LP (Delaware)                                              
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|Duke Energy Merchants Investments (UK) Limited (England and Wales)           |  | Duke Engineering & Services (Europe) Inc. (Delaware)                               
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|Duke Energy Merchants Trading and Marketing (UK) Limited (England)           |  | Duke Engineering & Services International, Inc. (Cayman Islands)                   
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|Duke Energy Merchants UK LLP (England and Wales)                             |  | Duke Java, Inc. (Nevada)                                                           
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|Duke Energy Midstream Services Canada Corporation (Canada (Nova Scotia ULC)) |  | DukeNet Communications, LLC (Delaware)                                             
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|Duke Energy MNEP Holdings Limited Partnership (Canada (British Columbia))    |  | Duke Project Services, Inc. (North Carolina)                                       
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|Duke Energy Moapa, LLC (Delaware)                                            |  | Duke Project Services Australia Pty Ltd (Australia)                                
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|Duke Energy Mohave, LLC (Delaware)                                           |  | Duke Project Services Funding Corp. (Delaware)                                     
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|Duke Energy Morro Bay LLC (Delaware)                                         |  | Duke Project Services Group, Inc. (Delaware)                                       
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|Duke Energy Moss Landing LLC (Delaware)                                      |  | Duke Project Services Investments, LLC (Delaware)                                  
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|Duke Energy Mulberry, LLC (Delaware)                                         |  | Duke Project Services Texas, LP (Delaware)                                         
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|Duke Energy Murray Operating, LLC (Delaware)                                 |  | DukeSolutions/Evendale, LLC (North Carolina)                                       
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|Duke Energy Natural Gas, LLC (Delaware)                                      |  | Duke Trading Do Brasil Ltda. (Brazil)                                              
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|Duke Energy Natural Gas Corporation (Delaware)                               |  | Duke Ventures, LLC (Nevada)                                                        
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|Duke Energy NGL Operating, LLC (Delaware)                                    |  | East Hampton GP, LLC (Delaware)                                                    
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|Duke Energy NGL Services, LP (Delaware)                                      |  | East Hampton Limited Partnership (Florida)                                         
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|Duke Energy North America, LLC (Delaware)                                    |  | Eastman Whipstock, S.A. (Argentina)                                                
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|Duke Energy Northeast Transmission Company (Delaware)                        |  | Eastman Whipstock do Brasil Ltda. (Brazil)                                         
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|Duke Energy Northern Investments Corporation (Canada (Nova Scotia ULC))      |  | Eastover Land Company (Kentucky)                                                   
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|Duke Energy Nova Scotia Holdings Co. (Canada (Nova Scotia))                  |  | Eastover Mining Company (Kentucky)                                                 
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|Duke Energy Oakland LLC (Delaware)                                           |  | EasTrans Limited Partnership (Texas)                                               
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|Duke Energy Operating Company, LLC (Delaware)                                |  | East Tennessee Natural Gas, LLC (Tennessee)                                        
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|Duke Energy Peru Holdings S.R.L. (Peru)                                      |  | ED Services, LLC (Delaware)                                                        
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|Duke Energy Power Assets Holding, Inc. (Colorado)                            |  | Egan Hub Storage, LLC (Delaware)                                                   
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|Duke Energy Providence, LLC (Delaware)                                       |  | Electroguayas, Inc. (Cayman Islands)                                               
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|Duke Energy Receivables Finance Company, LLC (Delaware)                      |  | Electroquil, S.A. (Guayaquil, Ecuador)                                             
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|Duke Energy Registration Services, Inc. (Delaware)                           |  | Energy Pipelines International Company (Delaware)                                  
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|Duke Energy Risk Services, L.L.C. (Delaware)                                 |  | Engage Energy Canada, L.P. (Alberta, Canada)                                       
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|Duke Energy Royal, LLC (Delaware)                                            |  | Engage Energy Canada Co. (Canada (Nova Scotia))                                    
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|Duke Energy Services, Inc. (Delaware)                                        |  | Entryway Developers, LLC (Delaware)                                                
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|Duke Energy Services Canada Ltd. (Canada (Alberta))                          |  | Eteselva S. R. L. (Peru)                                                           
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|Duke Energy Services Ireland Limited (Republic of Ireland)                   |  | Fort Drum Cogenco, Inc. (New York)                                                 
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|Duke Energy South Bay, LLC (Delaware)                                        |  | Fort Frances Cogeneration L.P. (Ontario)                                           
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|Duke Energy Southeast Pipeline Corporation (Delaware)                        |  | Fort Frances Cogeneration Management Inc. (CanadaFederal Laws)                    
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|Duke Energy St. Francis, LLC (Delaware)                                      |  | Fort Walton Development, LLC (Delaware)                                            
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|Duke Energy Supply Chain Services, LLC (Delaware)                            |  | FP Real Estate One, LLC (Arizona)                                                  
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|Duke Energy Texas Intrastate Pipeline, LLC (Delaware)                        |  | Fuels Acquisition Company Operating LLC (Delaware)                                 
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|Duke Energy Trading and Marketing, L.L.C. (Delaware)                         |  | Fuels Cotton Valley Gathering, LP (Delaware)                                       
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|Duke Energy Trading Exchange, LLC (Delaware)                                 |  | Gardens of Bridgehampton, LLC (Delaware)                                           
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|Duke Energy Transport and Trading Company, LLC (Colorado)                    |  | Gas Integral S.R.L. (Peru)                                                         
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|Duke Energy Trenton, LLC (Delaware)                                          |  | Generadora La Laguna Duke Energy International Guatemala y Cia., S.C.A. (Guatemala)
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|Duke Energy Vermillion, LLC (Delaware)                                       |  | General Gas Company, LP (Texas)                                                    



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|GNE Holdings, L.L.C. (Delaware)                                            |  | Moss Bluff Hub Partners, L.L.C. (Delaware)                
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|Gordondale West Plant                                                      |  | Moss Bluff Hub Partners, L.P. (Delaware)                  
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|Grand Haven Developers, LLC (Delaware)                                     |  | MP Supply, Inc. (North Carolina)                          
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|Grand Haven Golf Club, LLC (Delaware)                                      |  | National Helium, LLC (Delaware)                           
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|Green Fields Investments, LLC (North Carolina)                             |  | NC Development & Design Company, LLC (Delaware)           
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|Greenville Gas and Electric Light and Power Company (South Carolina)       |  | New Riverside, LLC (South Carolina)                       
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|Griffith Energy, LLC (Delaware)                                            |  | North Bank Developers, LLC (Delaware)                     
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|GSRI Transportation LLC (Texas)                                            |  | North Hampton, LLC (Delaware)                             
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|Gulf Coast NGL Pipeline, L.L.C. (Delaware)                                 |  | NorthSouth Insurance Company Limited (Bermuda)            
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|Hampton Ridge Developers LLC (Delaware)                                    |  | Oldfield, LLC (South Carolina)                            
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|Hawks Haven Developers, LLC (Delaware)                                    |  | One Thirty-One Developers, LLC (Delaware)                 
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|Hawks Haven Golf Course Community Developers, LLC (Delaware)              |  | Osprey Cove Realty, LLC (Delaware)                        
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|Hawks Haven Joint Development, LLC (Delaware)                             |  | Osprey Development, LLC (Delaware)                        
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|Hawks Haven Sponsor, LLC (Delaware)                                       |  | Overland Trail Transmission, LLC (Delaware)               
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|Headwaters Development Limited Partnership (South Carolina)                |  | Ozona Gas Processing Plant (Texas)                        
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|Hidroelectrica Cerros Colorado (Argentina)                                 |  | P.I.D.C. Aguaytia, L.L.C. (Delaware)                      
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|Houston Center Corporation (Delaware)                                      |  | Pablo Developers, LLC (Delaware)                          
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|IGC Aguaytia Partners, LLC (Cayman Islands)                                |  | Palmetto Bluff Club, LLC (South Carolina)                 
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|II Tryon Investment Trading Society (North Carolina)                       |  | Palmetto Bluff Development, LLC (South Carolina)          
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|Inversiones Duke Bolivia S.A. (Bolivia)                                    |  | Palmetto Bluff Investments, LLC (South Carolina)          
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|Iowa Plant JV                                                              |  | Palmetto Bluff Lodge, LLC (South Carolina)                
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|iSpheres Corporation (Not a Duke company) (California)                     |  | Palmetto Bluff Real Estate Company, LLC (South Carolina)  
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|LandMar Group, LLC (Delaware)                                              |  | Palmetto Bluff Uplands, LLC (South Carolina)              
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|LandMar Management, LLC (Delaware)                                         |  | Panama City Development, LLC (Delaware)                   
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|Lizacorp S.A. (Ecuador)                                                    |  | PanEnergy Colorado (Delaware)                             
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|M&N Management Company (Delaware)                                          |  | PanEnergy Corp (Delaware)                                 
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|M&N Operating Company, LLC (Delaware)                                      |  | PanEnergy Dauphin Island, LLC (Delaware)                  
|                                                                           | 
|Maritimes & Northeast Pipeline, L.L.C. (Delaware)                          |  | PanEnergy Development Company (Delaware)                  
|                                                                           | 
|Maritimes & Northeast Pipeline Limited Partnership (Canada (New Brunswick) |  | PanEnergy Exploration and Production (Peru) Ltd. (Bermuda)
|                                                                           | 
|Maritimes & Northeast Pipeline Management Ltd. (Canada - Federal Laws)     |  | PanEnergy Louisiana Intrastate, LLC (Delaware)            
|                                                                           | 
|Market Hub Partners Canada L.P. (Canada (Ontario))                         |  | PanEnergy Mobile Bay Processing, LLC (Delaware)           
|                                                                           | 
|Market Hub Partners Holding, LLC (Delaware)                                |  | PanEnergy Services, Limited Partnership (Louisiana)       
|                                                                           | 
|Market Hub Partners Management Inc. (Canada - Federal Laws)                |  | Panhandle Acquisition Three, Inc. (Delaware)              
|                                                                           | 
|Masters Creek Louisiana Pipeline, LLC (Delaware)                           |  | Panhandle Four, Inc. (Delaware)                           
|                                                                           | 
|Masters Creek Plant and Gathering JV                                       |  | Pan Service Company (Delaware)                            
|                                                                           | 
|Masters Creek Residue Line JV                                              |  | Parkside Development, LLC (Florida)                       
|                                                                           | 
|May River Forest, LLC (South Carolina)                                     |  | PCCD, LLC (Delaware)                                      
|                                                                           | 
|May River Golf Club, LLC (South Carolina)                                  |  | PEC Midwest, Inc. (Delaware)                              
|                                                                           | 
|McMahon Power Holdings Inc. (Canada (British Columbia))                    |  | Pegasus Gas Plant & Gathering JV                          
|                                                                           | 
|McMahon Power Holdings Limited Partnership (Canada (British Columbia))     |  | Pelmar Company (Delaware)                                 
|                                                                           | 
|McNinch-Hill Investments, LLC (North Carolina)                             |  | Peru Energy Holdings, LLC (Delaware)                      
|                                                                           | 
|MCP, LLC (South Carolina)                                                  |  | Peru Energy Holdings Corporation (Cayman Islands)         
|                                                                           | 
|Midcontinent Pipeline Operating, LLC (Delaware)                            |  | Petroleum Transmission Company (Canada)                   
|                                                                           | 
|Milford Estates, LLC (North Carolina)                                      |  | Piedmont Row Development, LLC (Delaware)                  



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|                                                        |  |                                                                
|------------------------------------------------------- |  | ---------------------------------------------------------------
|Ponce Developers, LLC (Delaware)                        |  | The Arlington Potomac Yard TMP Association (Virginia)          
|                                                        | 
|Potomac Yard Holding Company, LLC (Delaware)            |  | The Club at Osprey Cove, LLC (Delaware)                        
|                                                        | 
|Provident City Pipeline System P/S                      |  | The Farms, LLC (North Carolina)                                
|                                                        | 
|Rim Chaparral Pines Real Estate Services, LLC (Arizona) |  | The Golf Club at Chaparral Pines, LLC (Arizona)                
|                                                        | 
|Rio Bravo Gas Systems, LLC (Delaware)                   |  | The Golf Club at North Hampton, LLC (Delaware)                 
|                                                        | 
|River Paradise, LLC (Delaware)                          |  | The Golf Club at South Hampton, LLC                            
|                                                        | 
|Roberts Road, LLC (Delaware)                            |  | The Grand Club, LLC (Delaware)                                 
|                                                        | 
|Sailview Properties, LLC (North Carolina)               |  | The Oldfield Realty Company, LLC (South Carolina)              
|                                                        | 
|Saltville Gas Storage Company L.L.C. (Virginia)         |  | The Parks at Meadowview, LLC (Delaware)                        
|                                                        | 
|San Jacinto Gas Transmission Company (Texas)            |  | The Parks of Berkeley, LLC (Delaware)                          
|                                                        | 
|Seahorse do Brasil Servicos Maritimos Ltda. (Brazil)    |  | The Point on Norman, LLC (North Carolina)                      
|                                                        | 
|Seddon Place Development, LLC (Delaware)                |  | The Reserve, LLC (Delaware)                                    
|                                                        | 
|Seven Corporate Centre Holding Company, LLC (Delaware)  |  | The River Club Realty, LLC (Georgia)                           
|                                                        | 
|Six Mile Creek Ventures, LLC (Delaware)                 |  | The Sanctuary at Lake Wylie, LLC (Delaware)                    
|                                                        | 
|SLCD (Delaware)                                         |  | Third & Fourth South Developers, LLC (Delaware)                
|                                                        | 
|Southeastern Energy Services, Inc. (Delaware)           |  | TPC Storage Holding Corp. (Delaware)                           
|                                                        | 
|Southern Hills Plantation Golf Club, LLC (Delaware)     |  | Trout Creek Developers, LLC (Delaware)                         
|                                                        | 
|Southern Hills Realty, LLC (Delaware)                   |  | Trunkline Oil Pipeline Company (Delaware)                      
|                                                        | 
|Southern Power Company (North Carolina)                 |  | Turbine Fleet Management, LLC (Delaware)                       
|                                                        | 
|South Hampton GP, LLC (Delaware)                        |  | Tussahaw Development, LLC (Georgia)                            
|                                                        | 
|South Village Developers, LLC (Delaware)                |  | Twin Creeks Holdings, Ltd. (Texas)                             
|                                                        | 
|Springfield Crescent, LLC (Delaware)                    |  | Twin Creeks Management LLC (Delaware)                          
|                                                        | 
|St. Clair Pipelines (1996) Ltd. (Canada)                |  | Twin Creeks Operating Company, LP (Texas)                      
|                                                        | 
|St. Clair Pipelines L.P. (Canada)                       |  | Twin Creeks Property, Ltd. (Texas)                             
|                                                        | 
|St. Clair Pipelines Management Inc. (Canada)            |  | Two Lake Pony Farm, LLC (North Carolina)                       
|                                                        | 
|Stanton Gathering System                                |  | Tyvola Crossing Associates Limited Partnership (North Carolina)
|                                                        | 
|StoneWater Bay Properties, LLC (North Carolina)         |  | UEI Holdings (New Brunswick) Inc. (Canada)                     
|                                                        | 
|Stratford on Howard Development, LLC (Delaware)         |  | Union Gas Limited (Canada (Ontario))                           
|                                                        | 
|Sugarloaf Country Club, LLC (Georgia)                   |  | Union Services Inc. (Ontario)                                  
|                                                        | 
|Sugarloaf Properties, LLC (Georgia)                     |  | Union Utilities Inc. (Ontario)                                 
|                                                        | 
|Sugarloaf Realty, LLC (Georgia)                         |  | Union Water Inc. (Canada (Ontario))                            
|                                                        | 
|TEC Aguaytia, Ltd. (Bermuda)                            |  | United LP Gas, LLC (Oklahoma)                                  
|                                                        | 
|TEPPCO Holdings, Inc. (Delaware)                        |  | Upstate Land Co. LLC (South Carolina)                          
|                                                        | 
|Termoselva S. R. L. (Peru)                              |  | Wateree Power Company (South Carolina)                         
|                                                        | 
|Texas Eastern (Bermuda) Ltd. (Bermuda)                  |  | Webb Duval Gatherers Holding, LP (Delaware)                    
|                                                        | 
|Texas Eastern Aircraft Holdings, LLC (Delaware)         |  | WEI Financial Services LLC (Delaware)                          
|                                                        | 
|Texas Eastern Arabian Ltd. (Bermuda)                    |  | WEI Management Holdings LLC (Delaware)                         
|                                                        | 
|Texas Eastern Communications, Inc. (Delaware)           |  | WEI Nova Scotia Holdings Inc. (Canada (Nova Scotia))           
|                                                        | 
|Texas Eastern Cross Bay Company (Delaware)              |  | Weld County EP Properties, L.L.C. (Colorado)                   
|                                                        | 
|Texas Eastern Cryogenics, Inc. (Delaware)               |  | Westcoast Energy (U.S.) LLC (Delaware)                         
|                                                        | 
|Texas Eastern Oil Company (Delaware)                    |  | Westcoast Energy Enterprises (U.S.) Inc. (Delaware)            
|                                                        | 
|Texas Eastern Slurry Transport Company (Delaware)       |  | Westcoast Energy Inc. (Canada)                                 
|                                                        | 
|Texas Eastern Terminal Company (Delaware)               |  | Westcoast Energy International Inc. (Canadian Federal)         
|                                                        | 
|Texas Eastern Transmission, LP (Delaware)               |  | Westcoast Energy Ventures Inc. (CanadaFederal Laws)           
|                                                        | 
|Texas-Louisiana Pipeline Company (Delaware)             |  | Westcoast Gas Services (U.S.A.) LLC (Delaware)                 
|                                                        | 
|Texas-Louisiana Pipeline L.L.C. (Delaware)              |  | Westcoast Gas Services Inc. (Canadian Federal)                 



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|                                                                   |  | 
|------------------------------------------------------------------ |  | 
|Westcoast Indemnity Company Limited (Canada (British Columbia))    |  | 
|                                                                   | 
|Westcoast Transmission Company (Alberta) Ltd. (Canada (Alberta))   |  | 
|                                                                   | 
|Westcoast Transmission Company Limited (Canada (British Columbia)) |  | 
|                                                                   | 
|Western Carolina Power Company (North Carolina)                    |  | 
|                                                                   | 
|Winding River, LLC (Delaware)                                      |  | 
|                                                                   | 
|Wolfcamp Gathering & Comp.                                         |  |