South System Expansion 4 Project

Project Overview

Following the successful pre-filing process on October 2024 (Docket No. PF25-1-000), Southern Natural Gas, L.L.C. (SNG) and Elba Express Company, L.L.C. (EEC), submitted an application to the Federal Energy Regulatory Commission (FERC) on June 30, 2025 seeking a certificate of public convenience and necessity to construct, abandon, install, operate, and maintain pipeline, compression, and associated facilities for SNG's and EEC's proposed South System Expansion 4 Project (SSE4) (Docket No. CP25-517-000).

The approximately $3.5 billion project is designed to increase SNG's South Main Line capacity by approximately 1.3 Bc/d and 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 EEC pipeline systems (KM-share approximately $1.8 billion, including EEC). Assuming the timely receipt of all required permits and 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.