By Mary Holcomb, Digital Editor
(P&GJ) — The Federal Energy Regulatory Commission (FERC) has begun preparing an environmental impact statement (EIS) for two major natural gas pipeline expansions: Tennessee Gas Pipeline’s Mississippi Crossing (MSX) Project and Southern Natural Gas/Elba Express’ South System Expansion 4 (SSE4) Project, according to a Sept. 10 filing.
The review will cover new pipeline construction, compressor station installations, and facility upgrades across Mississippi, Alabama, and Georgia, with the projects designed to deliver more than 3.4 billion cubic feet per day (Bcf/d) of additional transportation capacity to the Southeast.
Project Details
Environmental Scope
FERC staff said the draft EIS will analyze potential impacts on water resources, wetlands, endangered species, cultural sites, and land use. The MSX project would affect 146 acres of wetlands and cross over 1,000 waterbodies, including the Big Black River and the Natchez Trace Parkway. SSE4 would affect 224 acres of wetlands and cross the Flint, Oconee, and Tallapoosa Rivers.
The draft EIS is scheduled for January 2026, with a final EIS expected by June 2026. A federal decision deadline is set for September 2026.
Mary Holcomb is the Digital Editor & Operations Manager at Gulf Energy Information, overseeing the Pipeline & Gas Journal, World Oil, and Underground Infrastructure brands. With over 5 years of experience, she drives digital content strategy and operations for these industry-leading publications.