| CSL Exploration | CSL Exploration, Lp. | Natural gas | TX | |
| CTX Refined Products | Sunoco Pipeline L.p. | Refined products | TX | |
| Caballo Loco Midstream Infrastructure II | Caballo Loco Midstream Infrastructure II LLC | Natural gas | TX | |
| Caballo Loco Midstrm Inf Ii Hulldale Gathering System | Caballo Loco Midstrm Inf Ii, LLC | Natural gas | TX | |
| Cable Gas Line | Bopco, L.p. | Natural gas | TX | |
| Cabot Oil & Gas ST 228 #1 | Cabot Oil & Gas Corp | Natural gas | TX | |
| Cactus Pipeline | Plains Pipeline, L.p. | Crude oil | | |
| Caddeaux Gathering | Caddeaux Gathering , LLC | Natural gas | LA | |
| Caelus Natural Resources Alaska | Caelus Natural Resources Alaska, LLC | Refined products | AK | |
| Caerus Piceance | Caerus Piceance LLC | Natural gas | CO | |
| Caerus Uinta | Caerus Uinta LLC | Natural gas | UT | |
| Cajun-Sibon I | | NGL | | |
| Calcasieu Refining (refined products) | Calcasieu Refining Company | Refined products | LA | |
| Caldwell Industrial | Wra, Inc. | Natural gas | TX | |
| Caldwell System | Flint Hills Resources, LC | Crude oil | TX | |
| Caliber Bear Den Interconnect | Caliber Bear Den Interconnect LLC | Crude oil | ND | |
| Caliber North Dakota | Caliber North Dakota LLC | Natural gas | ND | |
| Caliber North Dakota (NGL) | Caliber North Dakota LLC | NGL | ND | |
| Caliber North Dakota (crude oil) | Caliber North Dakota LLC | Crude oil | ND | |
| Caliber Spring Creek | Caliber Spring Creek LLC | Crude oil | ND | |
| California Gas Gathering | California Gas Gathering Inc | Natural gas | CA | |
| California Gas Transmission Co | | Natural gas | | |
| California Resources Central Valley (crude oil) | California Resources Central Valley | Crude oil | CA | |
| California Resources Elk Hills (NGL) | California Resources Elk Hills, LLC | NGL | CA | |
| California Resources Elk Hills (refined products) | California Resources Elk Hills, LLC | Refined products | CA | |
| California Resources Ventura Basin | California Resources Ventura Basin | Natural gas | CA | |
| California Resources Ventura Basin (crude oil) | California Resources Ventura Basin | Crude oil | CA | |
| Callaghan | Mitsui E&p USA LLC | Natural gas | TX | |
| Callon (permian) | Callon (permian) LLC | Natural gas | TX | |
| Calnrg Operating | Calnrg Operating, LLC | Natural gas | CA | |
| Calnrg Operating (crude oil) | Calnrg Operating, LLC | Crude oil | CA | |
| Calpine Texas Pipeline Freestone | Calpine Texas Pipeline LP | Natural gas | TX | |
| Calpine Texas Pipeline Magic Valley System | Calpine Texas Pipeline LP | Natural gas | TX | |
| Calpine Texas Pipeline Pasadena | Calpine Texas Pipeline LP | Natural gas | TX | |
| Calumet Cotton Valley Refining | Calumet Cotton Valley Refining, Llc. | Refined products | LA | |
| Calumet Montana Refining | Calumet Montana Refining, LLC | Crude oil | MT | |
| Calumet Princeton Refining | Calumet Princeton Refining, LLC | Crude oil | LA | |
| Calumet San Antonio Refining | Calumet San Antonio Refining, LLC | Crude oil | TX | |
| Calumet Shreveport Refining | Calumet Shreveport Refining, LLC | Crude oil | LA | |
| Camino Natural Resources | Camino Natural Resources, LLC | Natural gas | OK | |
| Camino Real | WTG Bexar Transmission, LLC | Natural gas | TX | |
| Camino Real (RRC 00396412) | Camino Real Gas Gathering Company LLC | Natural gas | TX | |
| Camino Real (RRC 00396413) | Camino Real Gas Gathering Company LLC | Natural gas | TX | |
| Camino Real (RRC 00396414) | Camino Real Gas Gathering Company LLC | Natural gas | TX | |
| Camino Real (RRC 00396416) | Camino Real Gas Gathering Company LLC | Natural gas | TX | |
| Camino Real (RRC 00396417) | Camino Real Gas Gathering Company LLC | Natural gas | TX | |
| Camino Real (RRC 00396418) | Camino Real Gas Gathering Company LLC | Natural gas | TX | |
| Camino Real (RRC 966887) | Camino Real Gas Gathering Company LLC | Natural gas | TX | |
| Camino Real (natural gas) | WTG Bexar Transmission, LLC | Natural gas | TX | |
| Camino Real Gas Gathering | Camino Real Gas Gathering Company LLC | Natural gas | TX | |