Transwestern Pipeline (Southwest, Rockies): 11 active notices, 4 rated severity 4–5; 11 posted in the last 7 days. 2 outages in effect today: 0.110 Bcf/d offline at Station 3 Leupp Az, expected back Nov 3; the other has no stated volume. Capacity Offline →
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Transwestern Pipeline has declared a force majeure on the East Mainline effective Gas Day Oct 27 2026 at 9:00 AM, expiring Oct 28 2026 at 8:59 AM -- a single-day event. No specific capacity reduction figure is stated in the notice. The East Mainline carries Permian and San Juan Basin gas westbound toward SoCal and Arizona delivery points.
TW East Mainline force majeure on Oct 27 produces split-direction signal: bearish Waha/Permian as westbound takeaway is cut, bullish SoCal Border and Arizona delivery points as westbound supply is reduced; no capacity volume stated so exact cut is unquantified but duration is short at one gas day.
Reroute: Moderate: EPNG is the primary competing pipeline serving SoCal border and Arizona from the Permian Basin; if EPNG has available capacity, partial reroute is possible, but any simultaneous EPNG constraint would eliminate California reroute entirely.
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Transwestern Pipeline
[Transwestern Pipeline] [Capacity Constraint] M/L THOREAU WEST SYSTEM
SEV 3/5
Force Majeure1 Days
Transwestern Pipeline has posted a new force majeure notice (TW-121571) extending the M/L Thoreau West System constraint by one gas day, now effective Oct 27 9:00 AM through Oct 28 8:59 AM. This is a continuation of the FM originally posted under TW-121566 (Oct 26-27), with the window rolling forward one day. No capacity volume is stated in the notice; pre-event flow past this segment was approximately 1.10 Bcf/d (range 1.04-1.26 Bcf/d) based on the seven days prior to the event.
TW Thoreau West FM extends one more gas day (Oct 27-28) with no stated volume cap -- pre-event westbound flow was ~1.10 Bcf/d (range 1.04-1.26); expect continued bearish pressure at Waha and Transwestern Permian basis as basin gas remains backed up, with sustained bullish pressure at SoCal Border and Arizona delivery points.
Reroute: Moderate: EPNG is the primary competing pipeline for SoCal border deliveries from the Permian Basin, and may absorb some diverted volumes; however, if EPNG is simultaneously constrained, no California reroute exists.
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Transwestern Pipeline
[Transwestern Pipeline] [Capacity Constraint] M/L THOREAU WEST SYSTEM
SEV 3/5
Force Majeure1 Days
Transwestern Pipeline has posted a new notice ID (TW-121566) for the same Thoreau West System force majeure event previously posted as TW-121550, covering Oct 26 9:00 AM through Oct 27 8:59 AM. No new operational information is introduced -- the effective window, location, and reason are identical to the prior posting. Pre-event flow past the Thoreau West mainline (Station 3, Leupp AZ) averaged approximately 1.10 Bcf/d over the prior week (range 1.04-1.26 Bcf/d), but no capacity cap or volume figure is stated in this notice.
TW Thoreau West force majeure (Oct 26-27) cuts westbound Permian/San Juan takeaway with no stated volume -- pre-event flow was ~1.10 Bcf/d (range 1.04-1.26); expect bearish pressure at Waha and Transwestern Permian basis as basin gas backs up, with bullish pressure at SoCal Border and Arizona delivery points; no new information vs TW-121550.
Reroute: Moderate: EPNG serves the same SoCal border and Arizona markets as a competing westbound pipeline, though simultaneous EPNG constraints would eliminate California reroute options entirely.
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Transwestern Pipeline
[Transwestern Pipeline] [Force Majeure] Force Majeure Event - Bloomfield Compressor Station (Valverde Service). 10/28/26.
SEV 3/5
Force Majeure≈0.120 Bcf/d est.1 Days
Transwestern Pipeline has declared a force majeure at the Bloomfield Compressor Station (San Juan Lateral) due to mechanical failure, eliminating all 230,000 MMBtu/d (0.230 Bcf/d stated design capacity) of Harvest Valverde service for Gas Day October 28, 2026 only. The RECENT FLOW CONTEXT shows VALVERDE PLANT (loc_id 56423) had a pre-event median scheduled quantity of 0.12 Bcf/d, and the live capacity table for 10/26 shows 0.120 Bcf/d scheduled against zero operating capacity (vs-design flag), confirming the effective cut is approximately 0.12 Bcf/d. Service is expected to restore on Gas Day October 29, 2026. Only the Harvest Valverde interconnect is affected.
Single-day TW force majeure at Bloomfield CS removes approximately 0.12 Bcf/d of San Juan Basin receipt capacity on Gas Day 10/28 only; expect minor bearish pressure at San Juan basis and a negligible bullish signal at SoCal Border and Arizona delivery points given the limited scale and one-day duration.
Reroute: Moderate: EPNG serves overlapping SoCal border and Arizona markets and likely has sufficient spare capacity to absorb the modest 0.12 Bcf/d loss from this single interconnect; however, San Juan production tied specifically to Harvest Valverde has no direct bypass.
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Transwestern Pipeline
[Transwestern Pipeline] [Force Majeure] Force Majeure - East Mainline- Compressor Station mechanical Failure 10/27/26
SEV 3/5
Force Majeure0.120 Bcf/d cut (capped at 0.630 Bcf/d)7 Days
Transwestern Pipeline has declared a force majeure due to a compressor station mechanical failure on the East Mainline, effective Gas Day October 27, 2026 through Gas Day November 3, 2026. East Mainline capacity is reduced from 750,000 MMBtu/d (0.750 Bcf/d) to 630,000 MMBtu/d (0.630 Bcf/d), a net reduction of 120,000 MMBtu/d (0.120 Bcf/d). Transwestern reserves the right to revise the schedule; restoration to full capacity is scheduled for November 3.
TW East Mainline FM removes 0.120 Bcf/d of westbound capacity through Nov 3; bearish Permian/San Juan basis as basin gas backs up, bullish SoCal Border and Arizona delivery points -- net cut is below 0.15 Bcf/d so physical impact is modest but the FM is binding with a known end date.
Reroute: Moderate: EPNG serves overlapping SoCal Border and Arizona markets and is the primary alternative for affected westbound volumes; however, if EPNG is simultaneously constrained, no California reroute exists.
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Transwestern Pipeline
[Transwestern Pipeline] [Force Majeure] Force Majeure - Station 3 (Leupp, AZ.) - Compressor Station mechanical Failure. 10/24/26 Revision 1
SEV 3/5
Force Majeure≈0.110 Bcf/d est. cut vs recent flow (capped at 1.000 Bcf/d)10 Days
Transwestern Pipeline declared a force majeure at Station 3 (Leupp, AZ) due to a compressor station mechanical failure effective Gas Day October 24, 2026. This Revision 1 provides a stepped capacity reduction schedule: Thoreau West System capacity is reduced from 1.240 Bcf/d to ~1.100 Bcf/d through October 26, then further to ~1.000 Bcf/d from October 27 through November 2, before restoring to 1.240 Bcf/d on November 3. Pre-event flow on the Thoreau West mainline past Station 3 was approximately 1.11 Bcf/d (median, range 1.04-1.26 Bcf/d), meaning the deeper Oct 27 cap of 1.000 Bcf/d implies a net reduction of roughly 0.11 Bcf/d against recent flow.
TW Station 3 FM steps Thoreau West capacity down to 1.000 Bcf/d by Oct 27 (vs ~1.11 Bcf/d pre-event median, net cut ~0.11 Bcf/d); expect modest bullish pressure at SoCal Border and Arizona delivery points, bearish Permian/Waha as westbound takeaway tightens, with EPNG as the primary reroute alternative through November 3.
Reroute: Moderate: El Paso Natural Gas (EPNG) is the primary competing pipeline serving SoCal Border and Arizona from the Permian/San Juan basin corridor; however, a simultaneous EPNG constraint would leave California with no reroute options.
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Transwestern Pipeline
[Transwestern Pipeline] [Operational Alert] CRITICAL NOTICE - SAME DAY - OVERAGE ALERT - PHOENIX AREA
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Transwestern Pipeline
[Transwestern Pipeline] [Capacity Constraint] M/L THOREAU WEST SYSTEM
SEV 3/5
Force Majeure1 Days
Transwestern Pipeline has declared a force majeure on the M/L Thoreau West System effective Oct 26 9:00AM through Oct 27 8:59AM -- a one-day constraint window. This posting (TW-121550) shifts the effective window one day later relative to the prior notice TW-121552, which covered Oct 25-26; no capacity volume is stated. Pre-event flow past the Thoreau West mainline (Station 3/Leupp, AZ) was running at a median of approximately 1.10 Bcf/d (range 1.04-1.26 Bcf/d over Oct 19-25), but no cap or reduction figure is provided in the notice.
TW Thoreau West force majeure (Oct 26-27) cuts westbound Permian/San Juan takeaway with no stated volume -- pre-event flow was ~1.10 Bcf/d; expect bearish pressure at Waha and bullish pressure at SoCal Border and Arizona delivery points, with the window now shifted one day later than the prior notice indicated.
Reroute: Moderate: EPNG serves the same SoCal border and Arizona delivery markets and is the primary competing pipeline for Transwestern; however, EPNG spare capacity on this date is unknown, and simultaneous EPNG + TW constraints would eliminate California reroute entirely.
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Transwestern Pipeline
[Transwestern Pipeline] [Capacity Constraint] M/L THOREAU WEST SYSTEM
SEV 4/5
Force Majeure1 Days
Transwestern Pipeline has extended a force majeure on the Thoreau West mainline by one gas day, now covering Oct 26 9:00 AM through Oct 27 8:59 AM (previously Oct 25-26). The notice states no specific capacity volume, but pre-event flow data shows the Thoreau West mainline was moving a median of approximately 1.11 Bcf/d westbound (range 1.04-1.26 Bcf/d over the prior week). No new cap is stated, so the net reduction remains unquantified but reflects a full or substantial interruption of that flow.
TW force majeure on Thoreau West mainline extended to gas day Oct 26-27, tightening westbound San Juan/Permian-to-California capacity for a second consecutive day; pre-event throughput past Station 3 (Leupp, AZ) was approximately 1.11 Bcf/d westbound -- expect continued bullish pressure at SoCal Border and Arizona delivery points, with bearish pressure at Transwestern Permian and San Juan basis, and note EPNG is the only reroute alternative for California-bound volumes.
Reroute: Moderate: El Paso Natural Gas (EPNG) is the primary competing pipeline for SoCal border deliveries; however, EPNG is the sole realistic alternative and may lack sufficient spare capacity to fully absorb a mainline Thoreau West constraint. A simultaneous EPNG constraint would leave California with no reroute.
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Transwestern Pipeline
[Transwestern Pipeline] [Force Majeure] Force Majeure - Station 3 (Leupp, AZ.) - Compressor Station mechanical Failure - Gas Day 10/24/26 (Until Further Notice)
SEV 4/5
Force Majeurecapped at 1.100 Bcf/d, cut unknown
Transwestern Pipeline declared force majeure at Station 3 (Leupp, AZ) due to a compressor station mechanical failure, effective Gas Day October 24, 2026 until further notice. The Mainline Thoreau West System capacity is restricted to approximately 1.1 Bcf/d with no stated restoration timeline. No pre-event baseline is available in the notice itself to quantify the net reduction, but the 1.1 Bcf/d ceiling on a major westbound segment represents a material capacity constraint on Permian/San Juan outbound flows toward SoCal and Arizona.
TW force majeure at Station 3 caps Mainline Thoreau West at 1.1 Bcf/d UFN; expect bearish pressure at Waha/Permian as westbound takeaway tightens, with bullish pressure at SoCal Border and Arizona delivery points -- EPNG is the only remaining major California-bound alternative.
Reroute: Moderate: EPNG serves the same SoCal border and Arizona markets and is the primary competing pipeline, but a simultaneous EPNG constraint would leave California with no reroute option. At current TW capacity restriction levels, some westbound reroute via EPNG is possible but may not fully offset the constrained volumes.
Force Majeurecapped at 1.100 Bcf/d, cut unknown9 Days
Transwestern Pipeline has declared a Force Majeure effective Gas Day October 24, 2026 due to a compressor station mechanical failure at Station 3 in Leupp, AZ. The Mainline Thoreau West System capacity is reduced to approximately 1.1 Bcf/d until further notice, with a currently stated end date of November 2, 2026. This is an unplanned event on a major westbound supply artery serving Arizona and California SoCal border markets.
Transwestern FM at Station 3 (Leupp, AZ) caps Thoreau West System at 1.1 Bcf/d; expect bullish pressure at SoCal Border and Arizona delivery points as westbound capacity is constrained, while Permian/Waha and San Juan basin points face bearish pressure from backed-up supply -- no pre-event baseline available to quantify the net reduction from the stated 1.1 Bcf/d ceiling, and EPNG is the only partial reroute for California markets.
Reroute: Moderate: EPNG serves overlapping SoCal border and Arizona markets and is the primary competing pipeline; however, if EPNG is simultaneously constrained, California supply reroute drops to none. TW and EPNG together represent the two dominant westbound arteries from the Permian and San Juan basins.
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About Transwestern Pipeline
Takes West Texas, New Mexico and Panhandle supply west to the Phoenix area and the California border.
Operated by
Energy Transfer
Runs
The Permian, San Juan and Anadarko basins west to Arizona and the California border
Trading points
Waha, Permian, San Juan, SoCal Border (Topock / Needles)
Mapped facilities
Atoka 2, Station P-3, Station 8
Line from EIA pipeline data; dots are facilities named in this pipeline’s notices (HIFLD locations). Dashed lines are schematic.
