| Algonquin/TETCO Lambertville Upgrade | | NJ | In service 2001 | |
| Allegheny Storage Project | Dominion Transmission, Inc. | MD, OH, PA | In service 2014 | |
| Allen Compressor Station Modification Project | Enable Gas Transmission, LLC | OK | In service 2018 | |
| Alliance | Alliance Pipeline L.P. | MS | | |
| Alliance Pipeline CP13-21 | Alliance Pipeline L.P. | ND | In service 2013 | |
| Alliance Project (Import Station) | | ND | In service 2000 | |
| Alliant Techsystems Operations CP12-518 | Alliant Techsystems Operations LLC | | | |
| Altamont Green River Pipeline Project | Kinder Morgan Altamont LLC | UT | In service 2025 | |
| Alto Compressor Station Project | Centerpoint Energy Gas Transmission | LA | Started 2010 | |
| Amarillo Expansion | Natural Gas Pipeline Company of America | IL, LA | In service 1998 | |
| Amarillo Project | Natural Gas Pipeline Company of America LLC | TX | | |
| Amend Cert. No. 151, Permit No. 162 & 163 | Dakota Prairie Refining, LLC | ND | | |
| Amend Cert. No. 209, Permit No. 219 | ONEOK Bakken Pipeline, L.L.C. | ND | | |
| Amend Certificate #203 and Route Permit #213 | Oneok Rockies Midstream, LLC | ND | Started 2023 | |
| Amerada Hess coastal use permit P20001836 pipeline | Amerada Hess Corp | LA | | |
| Ameren Delivery Project | Southern Star Central Gas Pipeline, Inc. | MO | | |
| Ameren – EMRT Castle Bluff Project | Enable Mississippi River Transmission, LLC | MO | Started 2026 | |
| American Midstream (louisiana Intrastate) coastal use permit P20101032 pipeline | American Midstream (louisiana Intrastate), LLC | LA | | |
| American Midstream (louisiana Intrastate) coastal use permit P20101060 pipeline | American Midstream (louisiana Intrastate), LLC | LA | | |
| American Midstream (louisiana Intrastate) coastal use permit P20110208 pipeline | American Midstream (louisiana Intrastate), LLC | LA | | |
| American Midstream C/o Jacobs Engineering coastal use permit P20160743 pipeline | American Midstream C/o Jacobs Engineering | LA | | |
| American Midstream Louisiana Intrastate coastal use permit P20120555 pipeline | American Midstream (louisiana Intrastate), LLC | LA | | |
| American Natural Energy coastal use permit P20030790 pipeline | American Natural Energy Corp. | LA | | |
| American Natural Energy coastal use permit P20201085 pipeline | American Natural Energy Corp. | LA | | |
| American Panther coastal use permit P20151013 pipeline | American Panther, LLC | LA | | |
| Amoco Producton coastal use permit P19960742 pipeline | Amoco Producton Company | LA | | |
| Amoco Producton coastal use permit P19970621 pipeline | Amoco Producton Company | LA | | |
| Angleton Compressor Station | | TX | | |
| Annova LNG Common Infrastructure PF15-15 | Annova LNG Common Infrastructure, LLC | | | |
| Anr Pipeline Company, Transcanada coastal use permit P20121278 pipeline | Anr Pipeline Company, Transcanada | LA | | |