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 underway on the proposed South System Expansion 4 (SSE4) Project designed to increase SNG’s South Line capacity by approximately 1.2 Bcf/d. Upon completion, the approximately $3 billion project will help meet growing power generation and local distribution company demand in the Southeast markets. SSE4 will be almost entirely comprised of brownfield looping and horsepower compression additions on the SNG and Elba Express pipeline systems. Subject to all required approvals, KMI expects the project to be in service beginning in late 2028.