Summary
Transwestern Pipeline declared force majeure at the GCX WAHA interconnect (loc 100744) effective Sep 12, 2026 9:00AM through Sep 13, 2026 8:59AM -- a one-day event. The capacity table for the prior gas day (Sep 11) shows GCX WAHA posting zero operating capacity against 0.027 Bcf/d scheduled (vs-design flag), consistent with the constraint already affecting nominations before the FM was formally declared. The stated capacity impact is limited to the scheduled volume at that point (~0.027 Bcf/d), though the force majeure floor sets minimum severity at 4 regardless.
Trading note
Transwestern FM at GCX WAHA removes approximately 0.027 Bcf/d of Permian takeaway at this interconnect for one day; expect bearish pressure at Waha/Permian basis as basin gas backs up, with mild bullish pressure at SoCal Border and Arizona delivery points -- volumes are small relative to TW system scale but force majeure status warrants monitoring for any scope expansion.
Reroute potential
Moderate: EPNG serves overlapping Permian-to-SoCal/Arizona corridors and is the primary reroute alternative; however, if EPNG is simultaneously constrained, no California reroute exists. Volumes affected at this single interconnect are small (~0.027 Bcf/d), limiting market impact absent escalation.
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View original notice text (as posted by Transwestern Pipeline)
Pipeline: Transwestern Pipeline
Notice ID: 120587
Notice Type: Capacity Constraint
Subject: GCX WAHA
Posted: Sep 11 2026 6:35PM
Effective: Sep 12 2026 9:00AM
End Date: Sep 13 2026 8:59AM
Notice Type Description: Capacity Constraint
Notice Identifier: 120587
Critical Notice Description: Critical notice
Posting Date/Time: Sep 11 2026 6:35PM
Notice Status Description: Initiate
Required Response Indicator Description: No response required
TSP: 7933047
TSP Name: TRANSWESTERN PIPELINE COMPANY, LLC
Subject: GCX WAHA
Notice Effective Date/Time: Sep 12 2026 9:00AM
Notice End Date/Time: Sep 13 2026 8:59AM
Reason: Force Majeure
Location: GCX WAHA
POI: 100744
DRN: 79100067
