1 EXHIBIT 21.1 Subsidiaries of Duke Energy Field Services, LLC State or other Jurisdiction of Name of Subsidiary Subsidiary Incorporation or Organization - ------------------ ---------------------------------------- AIM Pipeline, LLC Delaware Associated Louisiana Intrastate Pipe Line, LLC Delaware Atchafalaya Pipeline System, LLC Delaware Aurora Centana Gathering, LLC Louisiana Belle Rose NGL Pipeline, LLC Delaware Brigham-Duke (Delaware) LLC Delaware Centana Gathering, LLC Delaware Centana Intrastate Pipeline, LLC Delaware Centana Oil Gathering, LLC Delaware Duke Energy Canada Investments Ltd. Canadian Federal Entity Duke Energy Canada Pipeline Ltd. Canadian Federal Entity Duke Energy Comite, LLC Delaware Duke Energy Field Services Assets, LLC Delaware Duke Energy Field Services Canada Holdings, Inc. Delaware Duke Energy Field Services LP Acquisition, LLC Delaware Duke Energy Field Services Marketing, LLC Delaware Duke Energy Field Services Southwest, LLC Delaware Duke Energy Financial Services, LLC Delaware Duke Energy Fuels Operating LLC Delaware Duke Energy Gathering and Processing, L.P. Delaware Duke Energy Hinshaw Pipeline, LLC Delaware Duke Energy Intrastate Network, LLC Delaware Duke Energy Intrastate Pipeline, LLC Delaware Duke Energy Midstream Services Canada Ltd. Canadian Federal Entity Duke Energy NGL Services, LLC Delaware Duke Energy Oklahoma II, LLC Delaware Duke Energy Oklahoma Midstream, LLC Delaware Duke Energy Ozona Condensate, LLC Delaware Duke Energy Southwest Ozona Plant, LLC Delaware Duke Energy Stratton Liquid Pipeline, LLC Delaware Duke Energy Texas Intrastate Pipeline, LLC Delaware East Texas Regulated, LLC Delaware EasTrans Limited Partnership Texas Edwards Cotton Valley, LLC Delaware Fox Plant, LLC Delaware Fuels Acquisition Company Operating, LLC Delaware Fuels Cotton Valley Gathering, LLC Delaware Fuels Storage, LLC Delaware GPM Anadarko Gathering Company, LLC Delaware GPM Austin Gathering Company, LLC Delaware 2 GPM Eddy Gathering Company, LLC Delaware GPM Gas Company, LLC Delaware GPM Gas Gathering LLC Delaware GPM Gas Trading Company, LLC Delaware GPM Panhandle Gathering Company, LLC Delaware GPM Pipeline Company, LLC Delaware Gulf Coast NGL Pipeline, LLC Delaware Gulf Cotton Valley, LLC Delaware Highlands Gas, LLC Delaware Highlands NGL Pipeline, LLC Delaware Laverne Pipeline Company, LLC Delaware Laverne Pipeline Holding Company LLC Delaware Lubrication Services, LLC Delaware Masters Creek Louisiana Pipeline, LLC Delaware Midcontinent Pipeline Operating, LLC Delaware National Helium, LLC Delaware Ouachita River Gas Storage Co., LLC Louisiana Overland Trail Transmission, LLC Delaware PanEnergy Dauphin Island, LLC Delaware PanEnergy Louisiana Intrastate, LLC Delaware PanEnergy Mobile Bay Processing, LLC Delaware Panhandle Field Services, LLC Delaware Panhandle Gathering, LLC Delaware Panola Pipe Line, LP Delaware Peach Ridge Pipeline, LP Delaware Philips Gas Company Delaware Rio Bravo Gas Systems, LLC Delaware TEA Canada Ltd. Alberta Province, Canada TCE Flour Bluff, L.P. Texas TCTM, L.P. Delaware TEPPCO Colorado, LLC Delaware TEPPCO Crude Oil, LLC Delaware TEPPCO Crude Pipeline, LLC Delaware TEPPCO Investments, LLC Delaware TEPPCO Partners, L.P. Delaware TE Products Pipeline Company, Limited Partnership Delaware Texas Eastern Products Pipeline Company, LLC Delaware TPP Services, LLC Delaware Tri-States NGL Pipeline, LLC Delaware United L.P. Gas, LLC Oklahoma Weld County EP Properties, LLC Colorado