| Nustar Energy El Dorado terminal | Terminal | KS | Nustar Energy LP | |
| Nustar Energy El Paso terminal | Terminal | TX | Nustar Energy LP | |
| Nustar Energy Geneva Terminal | Terminal | NE | Nustar Energy LP | |
| Nustar Energy Harlingen terminal | Terminal | TX | Nustar Energy LP | |
| Nustar Energy Houston Asphalt terminal | Terminal | TX | Nustar Energy LP | |
| Nustar Energy Hutchinson terminal | Terminal | KS | Nustar Energy LP | |
| Nustar Energy Jacksonville terminal | Terminal | FL | Nustar Energy LP | |
| Nustar Energy Jamestown North terminal | Terminal | ND | Nustar Energy LP | |
| Nustar Energy Jamestown Terminal | Terminal | ND | Nustar Energy LP | |
| Nustar Energy Laredo terminal | Terminal | TX | Nustar Energy LP | |
| Nustar Energy Lemars Terminal | Terminal | IA | Nustar Energy LP | |
| Nustar Energy Linden terminal | Terminal | NJ | Nustar Energy LP | |
| Nustar Energy McPherson terminal | Terminal | KS | Nustar Energy LP | |
| Nustar Energy Milford Terminal | Terminal | IA | Nustar Energy LP | |
| Nustar Energy Mitchell Terminal | Terminal | SD | Nustar Energy LP | |
| Nustar Energy Moorhead terminal | Terminal | MN | Nustar Energy LP | |
| Nustar Energy Norfolk Terminal | Terminal | NE | Nustar Energy LP | |
| Nustar Energy North Platte Terminal | Terminal | NE | Nustar Energy LP | |
| Nustar Energy Northville Linden terminal | Terminal | NJ | Nustar Energy LP | |
| Nustar Energy Osceola terminal | Terminal | NE | Nustar Energy LP | |
| Nustar Energy Paulsboro terminal | Terminal | NJ | Nustar Energy LP | |
| Nustar Energy Piney Point terminal | Terminal | MD | Nustar Energy LP | |
| Nustar Energy Pittsburgh Asphalt terminal | Terminal | CA | Nustar Energy LP | |
| Nustar Energy Portland terminal | Terminal | OR | Nustar Energy LP | |
| Nustar Energy Rock Rapids Terminal | Terminal | IA | Nustar Energy LP | |
| Nustar Energy Rosario Asphalt terminal | Terminal | NM | Nustar Energy LP | |
| Nustar Energy Roseville Terminal | Terminal | MN | Nustar Energy LP | |
| Nustar Energy Salina Terminal | Terminal | KS | Nustar Energy LP | |
| Nustar Energy San Antonio East terminal | Terminal | TX | Nustar Energy LP | |
| Nustar Energy San Antonio South terminal | Terminal | TX | Nustar Energy LP | |
| Nustar Energy Sauk Centre Terminal | Terminal | MN | Nustar Energy LP | |
| Nustar Energy Selbycrockett terminal | Terminal | CA | Nustar Energy LP | |
| Nustar Energy Sioux Falls Terminal | Terminal | SD | Nustar Energy LP | |
| Nustar Energy Southlake terminal | Terminal | TX | Nustar Energy LP | |
| Nustar Energy Stockton terminal | Terminal | CA | Nustar Energy LP | |
| Nustar Energy Tacoma terminal | Terminal | WA | Nustar Energy LP | |
| Nustar Energy Vancover Stop terminal | Terminal | WA | Nustar Energy LP | |
| Nustar Energy Virginia Beach terminal | Terminal | VA | Nustar Energy LP | |
| Nustar Energy Wilimington terminal | Terminal | CA | Nustar Energy LP | |
| Nustar Energy Wolsey terminal | Terminal | SD | Nustar Energy LP | |
| Nustar Energy Yankton Terminal | Terminal | SD | Nustar Energy LP | |
| O`Connor | Gas processing plant | Weld County, CO | DCP Operating Company, LP | In service |
| Oahu Gas Plant | Gas processing plant | Pecos County, TX | | |
| Oak 1 Compressor Station | Compressor station | Washington County, OK | Osage Hills Pipeline Company, LLC | |
| Oak 3 Compressor Station | Compressor station | Osage County, OK | Osage Hills Pipeline Company, LLC | |
| Oak Grove | Gas processing plant | Marshall County, WV | Williams Partners LP | In service |
| Oak Midstream, LLC, Ellamore Compressor Station | Compressor station | WV | | |
| Oak Midstream, LLC, Mabie Compressor Station | Compressor station | WV | | |
| Oakford | Underground storage | Westmoreland County, PA | Dominion Energy Transmission Co | In service |
| Oaklawn CP ST Mint-Trif | Compressor station | Culberson County, TX | | |