[Transwestern Pipeline] [Capacity Constraint] M/L THOREAU WEST SYSTEM

SEV 4/5Force Majeure1 days

Summary

Transwestern Pipeline has declared a Force Majeure on the M/L Thoreau West System effective Oct 27, 2026 at 9:00 AM through Oct 28, 2026 at 8:59 AM -- a one-day window. This is a continuation/shift of the event previously posted as TW-121585, which covered Oct 26-27; no capacity reduction volume is stated in the notice. Pre-event flow past the Thoreau West mainline (Station 3, Leupp AZ) was running at a median of approximately 1.08 Bcf/d over the prior week (range 1.04-1.11 Bcf/d); without a stated cap, the net reduction is unquantified.

Trading note

TW force majeure on the Thoreau West mainline (pre-event flow ~1.08 Bcf/d westbound) cuts unquantified westbound capacity for Oct 27-28 gas days; expect bullish pressure at SoCal Gas and Arizona delivery points with bearish pressure at Transwestern Permian and San Juan basin-side prices as volumes back up upstream.

Reroute potential

Moderate: El Paso Natural Gas (EPNG) serves the same SoCal border and Arizona delivery markets and is the primary competing pipeline; however, simultaneous EPNG constraints would eliminate California reroute entirely, so available EPNG spare capacity should be confirmed before assuming full offset.

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 Transwestern Pipeline)

Pipeline: Transwestern Pipeline
Notice ID: 121583
Notice Type: Capacity Constraint
Subject: M/L THOREAU WEST SYSTEM
Posted: Oct 26 2026 6:38PM
Effective: Oct 27 2026 9:00AM
End Date: Oct 28 2026 8:59AM

Notice Type Description: Capacity Constraint
Notice Identifier: 121583
Critical Notice Description: Critical notice
Posting Date/Time: Oct 26 2026 6:38PM
Notice Status Description: Initiate
Required Response Indicator Description: No response required
TSP: 7933047
TSP Name: TRANSWESTERN PIPELINE COMPANY, LLC
Subject: M/L THOREAU WEST SYSTEM
Notice Effective Date/Time: Oct 27 2026 9:00AM
Notice End Date/Time: Oct 28 2026 8:59AM
Reason: Force Majeure
Location: M/L THOREAU WEST SYSTEM

Cite this Enercast Pipe Monitor, “[Transwestern Pipeline] [Capacity Constraint] M/L THOREAU WEST SYSTEM” (Transwestern Pipeline), posted 2026-10-27. https://enercast.com/notice/transwestern-pipeline-tw-121583-r1.html

ID: TW-121583 | Rev. 1 | Posted: 2026-10-27 02:31 | Direction: Bullish — Window shifted forward one day (Oct 27-28 vs Oct 26-27 in prior posting TW-121585); force majeure on Thoreau West mainline persists into next gas day All Transwestern Pipeline notices · page generated 2026-10-27 02:33 UTC