South System Expansion 4 Project

Project Overview

On October 31, 2024, Southern Natural Gas, L.L.C. (SNG) and Elba Express Company, L.L.C. submitted a request to the Federal Energy Regulatory Commission (FERC) seeking approval to use the FERC’s pre-filing process for the proposed South System Expansion 4 Project (assigned Docket No. PF25-1-000).  

Preliminary survey work is progressing on the South System Expansion 4 (SSE4) project designed to increase Southern Natural Gas’s (SNG) South Line capacity by approximately 1.3 Bcf/d. Upon completion, the approximately $3 billion project will help meet growing power generation and local distribution company demand in the Southeast. SSE4 will be completed in two phases and is almost entirely comprised of brownfield looping and horsepower compression additions on the SNG and Elba Express (EEC) pipeline systems (KM-share approximately $1.7 billion, including EEC). Subject to all required approvals, KMI expects to place the first phase of the project in service in the fourth quarter of 2028 and the second phase in the fourth quarter of 2029.