Kosciusko Junction Pipeline Clears Federal Permitting, Construction Set for 2027
The Kosciusko Junction Pipeline Project has cleared federal permitting, the Federal Permitting Improvement Steering Council announced, setting up construction on the 111-mile Mississippi natural gas line for 2027-2028. The Federal Energy Regulatory Commission served as lead permitting agency on the project, sponsored by Gulf South Pipeline Company, LLC and Texas Gas Transmission, LLC, both subsidiaries of Boardwalk Pipelines, LP.
Project scope
According to the Permitting Council, the project consists of approximately 111 miles of new 36-inch-diameter pipeline, six new compressors at new and existing stations, and new receipt or delivery meters at five locations. It will create 1,175 Mdth/d of firm transportation capacity for markets in the Southeast, connecting supply from the Midcontinent, Marcellus and Fayetteville basins.
Boardwalk’s own project page lists the construction detail: 103 miles of new 36-inch pipeline running from Attala County to Clarke County, Mississippi, plus 8 miles of new 36-inch pipeline in Humphreys and Sunflower counties. The company will build new compressor stations in Attala County (the Kosci Compressor Station) and Holmes County (the Holmes Compressor Station), and add compression at its existing Greenville station in Washington County and Isola station in Humphreys County.
FERC accepted the Gulf South and Texas Gas application into formal certificate proceedings in September 2025 under docket numbers CP25-547 and CP25-549, and issued a final environmental impact statement in July 2026 following a public scoping and comment process that began in late 2025.
“Boardwalk is pleased to receive approval to proceed with the Kosciusko Junction Project following a comprehensive federal review,” said Michael McMahon, Senior Vice President, Chief Legal and Regulatory Officer at Boardwalk Pipelines, LP. FERC Chairman Laura V. Swett called the approval a reflection of the commission’s “commitment to expanding the nation’s energy network,” while Sen. Cindy Hyde-Smith (R-Miss.) said expanded pipeline capacity is “necessary to support growth and to ensure secure and reliable energy supplies” in the state.
Timeline
Per Boardwalk’s published project timeline, construction is expected to run 2027-2028, with partial in-service possible as early as April 2028 and full in-service targeted for September 2028.
What It Means for Subcontractors
A 111-mile, 36-inch pipeline with six compressor packages spread across four Mississippi counties, Attala, Holmes, Washington and Humphreys, means a construction bid cycle should open well ahead of the 2027 start date. Boardwalk’s project page currently shows no active job postings or contract solicitations, so pipeline construction firms, civil contractors and compressor station specialists working the Southeast corridor should watch for procurement notices as FERC’s environmental compliance monitoring phase gets underway. The compressed 18-24 month build window for partial in-service points to multiple concurrent spreads rather than a single sequential build, which typically means more subcontract packages up for bid rather than one prime contractor absorbing the full scope.
