Gas Giants Plan Hundreds of Miles of New Pipelines
Published Date: 7/18/2025
Notice
Summary
Tennessee Gas Pipeline and Southern Natural Gas are planning big pipeline projects to boost natural gas flow across Mississippi, Alabama, and Georgia. These projects include building hundreds of miles of new pipelines, compressor stations, and safety upgrades, costing around $1.7 billion. If you’re affected or interested, you’ve got until a set deadline to speak up or get involved!
Analyzed Economic Effects
3 provisions identified: 1 benefits, 0 costs, 2 mixed.
Mississippi Crossing Project Planned
Tennessee Gas Pipeline Company plans the Mississippi Crossing (MSX) Project to build about 199 miles of 36- and 42-inch pipeline, additional laterals, three new gas-fired compressor stations, four meter stations, and overpressure protection facilities in Mississippi and Choctaw County, Alabama. The project is designed to add 2.1 billion cubic feet per day of firm capacity, is about 90% subscribed, and is estimated to cost approximately $1.7 billion.
South System Expansion 4 Planned
Southern Natural Gas and Elba Express propose the South System Expansion 4 (SSE4) Project to build about 291 miles of pipeline loops, add or expand compression at 12 stations, abandon nine compressor units and ~2.2 miles of lateral, and add/modify meter stations across Mississippi, Alabama, and Georgia. The project is designed to add 1.323 billion cubic feet per day of firm capacity, is fully subscribed, and is estimated to cost approximately $3.458 billion.
Deadline to Intervene or Comment
Any person who wants to be a party in these pipeline cases must file a motion to intervene by 5:00 p.m. Eastern Time on August 5, 2025. There is no fee to file comments, protests, or motions to intervene, and the Commission provides eComment, eFiling, and paper filing options and help from the Office of Public Participation.
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Key Dates
Department and Agencies
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