[FORCE MAJEURE] SESH Maint October Escalated to FMJ

SEV 4/5Force Majeure0.061 Bcf/d cut (capped at 0.447 Bcf/d)7 days

Summary

Southern Natural Gas has escalated planned SESH maintenance at the Delhi and Gwinville Compressor Stations to a force majeure event affecting SNG-SESH capacity on Segment 380. Normal capacity of 507,689 Dth/d (0.508 Bcf/d) is reduced on six specific gas days between October 20-29, with the largest single-day reduction occurring October 28 when capacity falls to 447,000 Dth/d (a cut of ~60,689 Dth/d or ~0.061 Bcf/d). Out-of-Path and In-Path services are at risk based on current nominations.

Trading note

SNG Segment 380 force majeure cuts SNG-SESH interconnect capacity by up to 0.061 Bcf/d on the worst day (Oct 28, restricted to 0.447 Bcf/d), with curtailments on six days through Oct 29; expect mild bullish pressure on Southern Natural La. and Southeast basis as out-of-path and in-path services face curtailment risk.

Reroute potential

Moderate: Gulf South and Transco serve overlapping Southeast markets and may absorb some displaced volumes; however, SNG is the dominant Southeast pipeline and SESH is a primary Gulf Coast interconnect, so full reroute is unlikely to offset all affected nominations on constrained days.

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View original notice text (as posted by Southern Natural Gas)

Pipeline: Southern Natural Gas
Notice Type: FORCE MAJEURE
Subject: SESH Maint October Escalated to FMJ
Posted: 10/20/2026 1:05:55PM
Effective: 10/20/2026 1:05:55PM
End Date: 10/21/2026 9:00:00AM

TSP/TSP Name:  6900518-SOUTHERN NATURAL GAS CO. Critical: Y
Notice Type Desc (1):  FORCE MAJEURE Notice Type Desc (2):  FORCE MAJEURE
Notice Eff Date/Time:  10/20/2026 1:05:55PM Notice End Date/Time:  10/21/2026 9:00:00am
Post Date/Time:  10/20/2026 1:05:55 PM Notice ID: 712558
Reqrd Rsp:  1 Rsp Date/Time:  10/20/2026 12:00:00 AM
Notice Stat Desc:  INITIATE Prior Notice: 
Subject:  SESH Maint October Escalated to FMJ
Notice Text:
As previously posted in Southern's Outage Impact Report and in notice ID# 712539, SESH pipeline's operator notified Southern that it will be conducting planned maintenance at their Delhi and Gwinville Compressor Stations which will reduce the available SNG-SESH capacity (Segment 380) to the capacity posted below. This maintenance will result in service reduction of SNG – SESH capacity as follows:
SNG Capacity will be reduced as follows:
 
October 20th – Capacity of 507,689 Dth/d will be reduced to 477,000 Dth/d.
October 21st – October 22nd - Capacity of 507,689 Dth/d will be reduced to 460,000 Dth/d.
October 23rd – Capacity of 507,689 Dth/d will be reduced to 482,000 Dth/d.
October 27th – Capacity of 507,689 Dth/d will be reduced to 470,000 Dth/d.
October 28th – Capacity of 507,689 Dth/d will be reduced to 447,000 Dth/d.
October 29th – Capacity of 507,689 Dth/d will be reduced to 476,000 Dth/d.
 
 
Points impacted in Segment 380 are listed below:
606400 SESH - CENTERPOINT TO SNG
606500 SESH - GULF SOUTH TO SNG
606700 SESH - ETC TIGER TO SNG
 
Based on current nominations and the reduced available capacity, Out-of-Path and In-Path Services are at risk.
This reduction in available capacity constitutes an event of Force Majeure under Section 8.3 of the General Terms and Conditions of the Southern Natural Gas Tariff.
If you have any questions, please contact your Scheduling Representative or Account Manager.

Cite this Enercast Pipe Monitor, “[FORCE MAJEURE] SESH Maint October Escalated to FMJ” (Southern Natural Gas), posted 2026-10-20. https://enercast.com/notice/southern-natural-gas-sng-712558-r1.html

ID: SNG-712558 | Rev. 1 | Posted: 2026-10-20 18:11 | Direction: Bullish — initial posting -- planned SESH maintenance escalated to force majeure, multi-day capacity reductions on Segment 380 All Southern Natural Gas notices · page generated 2026-10-20 18:12 UTC