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

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

Summary

Transco declared force majeure on 9/28/2026 due to a Variable Frequency Drive failure on Main Unit 9 at Compressor Station 50 (MP 517.23), restricting south-to-north mainline flows effective timely gas day 9/29/2026. The TSB at MP 517 shows design capacity of 1.536 Bcf/d with total available quantity of 1.300 Bcf/d, representing a 0.236 Bcf/d reduction (approximately 15% of design capacity) with 5-12% cuts to primary firm service. Repairs are underway and expected to be completed by end of week, but no firm restoration date is given and duration remains UFN.

Trading note

Transco Station 50 force majeure removes approximately 0.236 Bcf/d of south-to-north mainline capacity with 5-12% primary firm cuts, supportive of Transco Zone 4 and downstream zone basis widening vs Henry Hub; monitor CS 60 (already at 100% utilization per live data) and CS 65 South (81.5% loaded) as downstream choke points that could amplify impact if repairs extend beyond week-end.

Reroute potential

Limited: Transco is the dominant pipeline in the Southeast-to-Northeast corridor; Southern Natural Gas provides partial real-world alternative capacity in the Southeast but is unmonitored and cannot be confirmed available. Tennessee Gas Pipeline serves overlapping Northeast markets but cannot fully offset a Transco mainline constraint at this scale.

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View original notice text (as posted by Transco)

Pipeline: Transco
Notice: Update - Notice of Force Majeure Event - Unplanned Outage Station 50 Main Unit 9
Posted: 09/29/2026 16:00:40 CDT
Notice ID: 17328691

TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC

Critical:
 Y

Notice Eff Date:
 09/29/2026

Notice Eff Time:
 16:00:40 CDT

Notice End Date:
 

Notice End Time:
 

Notice ID:
 17328691

Notice Stat Desc:
 Supersede

Notice Type Desc:
 Force Maj

Post Date:
 09/29/2026

Post Time:
 16:00:40 CDT

Prior Notice:
 17324005

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: 
Update - Notice of Force Majeure Event - Unplanned Outage Station 50 Main Unit 9
Transco issued a Force Majeure Event on 9/28/2026 resulting in an unplanned outage at Compressor Station 50 
due to the Variable Frequency Drive on Main Unit 9 failing
.                                                             
Transco immediately restricted scheduled quantities moving south to north through the TSB below 
effective timely gas day 9/29/2026
. 
Repairs are underway and are expected to be completed by the end of the week. Additional updates will be provided as they are available.
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.

Cite this Enercast Pipe Monitor, “Update - Notice of Force Majeure Event - Unplanned Outage Station 50 Main Unit 9” (Transco), posted 2026-09-29. https://enercast.com/notice/transco-transco-17328691-r1.html

ID: TRANSCO-17328691 | Rev. 1 | Posted: 2026-09-29 23:31 | Direction: Bullish All Transco notices · page generated 2026-09-30 04:13 UTC