Notice of Force Majeure Event - Unplanned Outage Station 50 Main Unit 9

SEV 4/5Force Majeure0.236 Bcf/dUntil further notice

Summary

Transco has declared a force majeure event due to an unplanned equipment failure on Main Unit 9 at Compressor Station 50 (MP 517.23), effective timely gas day 9/29/2026 with no end date provided. The outage restricts south-to-north mainline flows through the TSB at MP 517, reducing total available capacity from 1,536 Mdt/d design capacity to 1,300 Mdt/d available -- a loss of approximately 236 MMdt/d (0.236 Bcf/d) -- with primary firm shippers facing potential cuts of 5-12% based on historical utilization. An updated posting with an estimated return-to-service date is expected no later than September 30, 2026.

Trading note

Transco CS 50 force majeure removes approximately 0.236 Bcf/d of south-to-north mainline capacity effective 9/29 UFN, expect bullish pressure at Transco Zone 4 and Zone 5/6 as northbound supply tightens, with primary firm shippers at 5-12% cut risk and no restoration timeline yet available.

Reroute potential

Limited: Transco is the dominant south-to-north mainline in this corridor; Southern Natural Gas (not monitored for live conditions) provides partial Southeast alternative capacity but cannot fully replace Transco mainline throughput for Mid-Atlantic and Northeast deliveries. Tennessee Gas Pipeline offers some competing capacity for Northeast markets but is unlikely to absorb the full constraint volume.

Get alerts like this, free

Enercast Pipe Monitor tracks critical notices on 190+ U.S. interstate pipelines and scores each one for severity, capacity impact and basis direction. Free subscribers get Severity 4–5 notices by email or Telegram; Pro subscribers get every notice in real time.

Get free alerts See Pro real-time → Today’s critical notices

View original notice text (as posted by Transco)

Pipeline: Transco
Notice: Notice of Force Majeure Event - Unplanned Outage Station 50 Main Unit 9
Posted: 09/28/2026 13:27:51 CDT
Notice ID: 17324005

TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC

Critical:
 Y

Notice Eff Date:
 09/28/2026

Notice Eff Time:
 13:27:51 CDT

Notice End Date:
 

Notice End Time:
 

Notice ID:
 17324005

Notice Stat Desc:
 Initiate

Notice Type Desc:
 Force Maj

Post Date:
 09/28/2026

Post Time:
 13:27:51 CDT

Prior Notice:
 

Reqrd Rsp Desc:
 Immediate response required of an operational nature may be required of impacted shippers

Rsp Date:
 

Rsp Time:
 

TSP:
 007933021

TSP Name:
 TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC

Notice Text: 
Subject: 
Notice of Force Majeure Event - Unplanned Outage Station 50 Main Unit 9
Transcontinental Gas Pipe Line Company, LLC ("Transco"), pursuant to Section 11 of the General Terms and Conditions of its FERC Gas Tariff, hereby provides notice of a Force Majeure event resulting in an unplanned outage at Compressor Station 50 due to equipment failure on Main Unit 9.
Transco must immediately restrict scheduled quantities moving south to north through the TSB below. 
The constraint
 
will be effective timely gas day 9/29/2026
. 
An updated posting with an estimated return to service date will be provided no later than Wednesday, September 30, 2026. 
All efforts are being made to return Main Unit 9 to service as quickly as possible.
The receipt-based Throughput Section Boundary (TSB) at mainline MP 517 (Station 50) will be used to manage capacity availability during this outage. An updated Market and Production Area constraint notice will include the location and the available quantity of all transportation services during the indicated period.
TSB Name Location
Location ID
Flow Direction
COMPRESSOR STATION W 50 MP 517.23 
9013363
South to North
 
Estimated Outage
Design Capacity (Mdt/d)
Total Qty Available (Mdt/d)
% Available Total Primary-Firm vs Design Capacity
% Cuts (Primary)Potential Shipper Impact (Based on Historical Utilization) 
  
9/29 Timely - UFN
1,536
1,300
85%
5-12%
 
If you have any questions, please contact your Transportation Services Representative.

ID: TRANSCO-17324005 | Rev. 1 | Posted: 2026-09-28 18:31 | Direction: Bullish All Transco notices · page generated 2026-09-28 18:35 UTC