| Buckeye Gulf Coast Pipe Lines OPSB case 04-1509-GA-BLN | Buckeye Gulf Coast Pipeline LLC | OH | | |
| Buckeye Gulf Coast Pipelines OPSB case 04-1232-GA-BLN | Buckeye Gulf Coast Pipelines,lp | OH | | |
| Buckeye Xpress | Columbia Gas Transmission, LLC | KY, OH, WV | In service 2020 | |
| Buckville Spur Line | | WV | | |
| Buffalo Compressor Station | | PA | In service 2012 | |
| Buffalo Run | Targa Resources | TX | | |
| Bull Run Extension | Targa Resources | TX | | |
| Burch Ridge Station | | | | |
| Burlington Res Oil & Gas coastal use permit P20071796 pipeline | Burlington Res Oil & Gas LP | LA | | |
| Burlington Res Oil & Gas coastal use permit P20080089 pipeline | Burlington Res Oil & Gas LP | LA | | |
| Burlington Res Oil & Gas coastal use permit P20080612 pipeline | Burlington Res Oil & Gas LP | LA | | |
| Burlington Res Oil & Gas coastal use permit P20081473 pipeline | Burlington Res Oil & Gas LP | LA | | |
| Burlington Resources Oil & Gas coastal use permit P20051547 pipeline | Burlington Resources Oil & Gas Company | LA | | |
| Burlington Resources Oil And Gas coastal use permit P20060429 pipeline | Burlington Resources Oil & Gas Company | LA | | |
| Burlington Resources coastal use permit P19981512 pipeline | Burlington Resources, Inc. | LA | | |
| Burlington Resources coastal use permit P20020038 pipeline | Burlington Resources, Inc. | LA | | |
| Bushton Compression Station Project | Northern Natural Gas Company | KS | | |
| Bushton to Clifton A-Line Replacement Project | Northern Natural Gas Company | KS | In service 2020 | |
| Bushy Park Extension Project | Dominion Energy Carolina Gas | SC | 2018 | |
| Butler County Phase 2 Natural Gas Pipeline | Duke Energy Ohio | OH | | |
| C-Line Replacement Project | Northern Natural Gas Company | IA | 2023 | |
| CCPL Expansion Project | Corpus Christi Liquefaction Stage IV, LLC | TX | | |
| CEGT Carthage/Perryville (Line CP) Phase IV | Centerpoint Energy Gas Transmission | LA | In service 2010 | |
| CEGT Cove Compressor Station Project | Centerpoint Energy Gas Transmission | AR | In service 2008 | |
| CEGT Elm Grove Supply Expansion | Centerpoint Energy Gas Transmission | LA | In service 2007 | |
| CEGT Harrison Supply Lateral Expansion | Centerpoint Energy Gas Transmission | TX | In service 2007 | |
| CEGT Line ACT-9 | | OK | In service 2003 | |
| CEGT Line J Expansion | | AR | In service 2002 | |
| CEGT Line2-AD-24 Childes Lateral | Centerpoint Energy Gas Transmission | OK | In service 2005 | |
| CEGT Long Lake Compressor Station Project | Centerpoint Energy Gas Transmission | LA | In service 2009 | |