ANR Pipeline (Gulf Coast, Midwest, Canada): 155 active notices, 18 rated severity 4–5; 9 posted in the last 7 days. 4 outages in effect today, 1.395 Bcf/d offline across the 3 with a stated volume; largest 0.890 Bcf/d at Greenville compressor station unit 7, expected back Nov 30. Capacity Offline →
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Force Majeure≈0.890 Bcf/d est. cut vs recent flow (capped at 0.220 Bcf/d)Until Further Notice36 Days
ANR Pipeline has declared a force majeure at Greenville Compressor Station Unit #7 in Washington County, Mississippi, due to unexpected equipment failure, curtailing capacity on the Southeast Mainline at Delhi Southbound (LOC FPDELHSB). On 10/26, no incremental volumes will be scheduled; from 10/27-10/31 and 11/1-11/30, capacity is reduced by 220 MMcf/d leaving 994 MMcf/d and 1,027 MMcf/d respectively. Pre-event flow at DELHI SOUTHBOUND TD2 was running at a median of 1.11 Bcf/d, implying a net cut of approximately 0.89 Bcf/d against the 0.220 Bcf/d cap, with firm primary service estimated at 16% impact through October and 13% in November.
ANR force majeure at Greenville CS Unit 7 cuts Delhi Southbound from a pre-event median of ~1.11 Bcf/d to a 0.220 Bcf/d cap, a net reduction of ~0.89 Bcf/d, with primary firm curtailments of 13-16% -- expect bullish pressure on ANR ML 7 and Midwest/Michigan basis as southbound Gulf Coast throughput is materially reduced through November 30.
Reroute: Moderate: Texas Eastern (TETCO), Trunkline (TGC), and Columbia Gulf Transmission (CGT) serve overlapping Gulf Coast northbound corridors, but with ANR running tight systemwide (multiple OVER and zero-headroom points visible in live data), full reroute of 0.89 Bcf/d displaced volume is unlikely without basis widening.
Force Majeure0.395 Bcf/d cut (capped at 0.930 Bcf/d)Until Further Notice29 Days
ANR Pipeline has extended its Force Majeure at St. John Eastbound (LOC #FPSTJNEB) on the Michigan Leg South through October 31, 2026, pushed back from the prior end date of October 19. The FM was originally declared on October 3 due to an anomaly between MLV 56 and MLV 57, reducing eastbound capacity by 395 MMcf/d (0.395 Bcf/d), leaving 930 MMcf/d available. Firm Primary curtailments of approximately 34% of contracted MDQ remain in effect, with RCC eligibility active under ANR Tariff Section 6.36.
ANR FM at St. John Eastbound removes 0.395 Bcf/d of Michigan Leg South eastbound capacity through Oct 31 (extended from Oct 19); live data shows 0.977 Bcf/d operating capacity with 0.642 Bcf/d scheduled on TD1 against the 0.930 Bcf/d post-FM ceiling, consistent with the stated constraint, and pre-event flow averaged ~0.67 Bcf/d (0.60-0.77 range) on TD1 -- the 0.930 Bcf/d cap sits above recent scheduled flow but well below normal operating capacity, with firm primary shippers taking a ~34% MDQ curtailment signaling real tightness at ANR ML 7 Michigan delivery points.
Reroute: Limited: TETCO, TGT, and PEPL serve overlapping Midwest/Michigan markets but ANR Michigan Leg South is a specific geographic corridor; partial reroute may be possible via TETCO or PEPL for some Michigan deliveries but full offset is unlikely given the firm primary curtailment level.
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ANR Pipeline (TC Energy)
UPDATED CAPACITY REDUCTION Southeast Mainline – Cottage Grove Southbound
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Michigan Leg South - St. John Eastbound
SEV 3/5
Maintenance0.545 Bcf/d cut (capped at 0.780 Bcf/d)Until Further Notice3 Days
ANR Pipeline has planned maintenance on the Michigan Leg South in Will County, IL affecting the St. John Eastbound location (LOC #FPSTJNEB) from November 3-5, 2026 (3 days). Capacity will be reduced by 545 MMcf/d (0.545 Bcf/d), leaving 780 MMcf/d (0.780 Bcf/d) available. ANR explicitly warns of Firm Primary, Firm Secondary, and Interruptible curtailments, estimating a 45% impact to Firm Primary MDQ -- a meaningful firm service impact over the 3-day window.
St. John Eastbound was carrying a median of ~0.64 Bcf/d (TD1) and ~0.20 Bcf/d (TD2) pre-event (range 0.59-0.67 and 0.18-0.35 respectively over the prior 7 days); the 0.780 Bcf/d cap sits above recent TD1 flow alone but combined scheduled throughput across both delivery cycles (~0.84-0.86 Bcf/d) implies a net cut of roughly 0.06-0.08 Bcf/d with firm curtailments at 45% of contracted MDQ, bullish for ANR ML 7 and Michigan/Wisconsin basis November 3-5.
Reroute: Moderate: ANR overlaps with TETCO, NGPL, and ANR's own parallel segments in the Illinois/Michigan corridor, but firm curtailments at 45% of MDQ suggest limited available alternative capacity on competing pipes for affected shippers during this window.
Force Majeure0.395 Bcf/d cut (capped at 0.930 Bcf/d)Until Further Notice17 Days
ANR Pipeline has declared a force majeure on the Michigan Leg South at St. John Eastbound (LOC #FPSTJNEB) due to an anomaly discovered between MLV 56 and MLV 57, restricting capacity by 395 MMcf/d (0.395 Bcf/d) and leaving only 930 MMcf/d available. The constraint, originally set to run from 10/3 through 10/12, has now been extended through 10/19, a total of 17 days. ANR anticipates firm primary curtailments of approximately 34% of contracted MDQ, with firm secondary and interruptible services also affected.
ANR force majeure removes 0.395 Bcf/d of Michigan Leg South eastbound capacity through 10/19; pre-event flow at St. John Eastbound (FPSTJNEB TD1) was running at a median 0.67 Bcf/d (range 0.59-0.75) against the now-constrained 0.977 Bcf/d operating capacity, with the new 0.930 Bcf/d cap implying a modest physical cut relative to recent scheduled flows of ~0.593 Bcf/d currently posted, but firm primary curtailments at 34% of MDQ signal tightening at ANR ML 7 Michigan/Wisconsin delivery markets.
Reroute: Limited: ANR is one of the primary pipelines serving Michigan and Wisconsin markets; NGPL, PEPL, and ANR's own alternative segments provide partial relief but cannot fully replace constrained Michigan Leg South eastbound capacity, particularly for firm primary shippers already facing 34% MDQ curtailments.
Force Majeure0.395 Bcf/dUntil Further Notice10 Days
ANR Pipeline declared force majeure on its Michigan Leg South system effective October 3, 2026, due to an anomaly discovered between MLV 56 and MLV 57. Eastbound capacity at St. John (LOC #FPSTJNEB) is reduced by 395 MMcf/d (0.395 Bcf/d), leaving 930 MMcf/d available, with the constraint expected to run through October 12. ANR warns of firm primary (estimated 34% of contracted MDQ), firm secondary, and interruptible curtailments, with RCCs to be issued per Tariff Section 6.36 if primary firm scheduled quantities cannot be met.
ANR force majeure removes 0.395 Bcf/d of eastbound Michigan Leg South capacity through Oct 12, with 34% of contracted firm primary MDQ at risk; expect bullish pressure on ANR ML 7 and Michigan/Wisconsin basis versus Henry Hub as Midwest supply tightens.
Reroute: Limited: TETCO (monitored), TGT (monitored), and PEPL (monitored) serve overlapping Gulf Coast-to-Midwest corridors but cannot fully replace Michigan-specific ANR Michigan Leg South deliveries; downstream Michigan LDC customers in particular have few practical bypass options.
Force Majeure0.186 Bcf/dUntil Further Notice10 Days
ANR Pipeline has declared a Force Majeure event on the Southwest Mainline Northbound due to a pipeline leak between MLV 22-23 just downstream of Havensville Compressor Station in Pottawatomie County, Kansas. Effective 9/26 intraday with no incremental volumes scheduled, and from 9/27 through 10/5 the SWML Northbound (LOC #226630) is limited to 520 MMcf/d (0.520 Bcf/d), reducing capacity by 186 MMcf/d (0.186 Bcf/d). ANR anticipates Firm Primary curtailments of approximately 6% of current net nominations and 31% of contracted MDQ.
ANR SWML Northbound force majeure removes 0.186 Bcf/d of northbound Gulf Coast-to-Midwest capacity through 10/5, with firm primary curtailments confirmed at up to 31% of contracted MDQ; expect bullish pressure at ANR ML 7 and Midwest delivery points versus Henry Hub, with the live SWML Northbound reading (0.553 Bcf/d scheduled against 0.615 Bcf/d operating capacity, 10.1% headroom) likely to tighten further as the restriction takes full effect.
Reroute: Moderate: TETCO, Trunkline (TGC), and Southern Natural (EGT) serve overlapping Gulf Coast-to-Midwest corridors and may absorb some displaced volumes, but with DEFIANCE WESTBOUND and LAGRANGE WESTBOUND already flagged OVER on the ANR system today, downstream congestion limits the effective reroute offset.
Force Majeure1.403 Bcf/dUntil Further Notice10 Days
ANR Pipeline has declared a Force Majeure at Patterson Compressor Station (Unit 1) in Jefferson Parish, Louisiana due to an unexpected equipment failure, effective September 25, 2026 through October 4, 2026. The outage reduces capacity across multiple interconnects including Shadyside/TGP (443 MMcf/d curtailed, leaving 30 MMcf/d), Weeks ISLA/LIG PL (260 MMcf/d curtailed), Patterson to Col Gulf (143 MMcf/d curtailed, leaving 0 MMcf/d), Shadyside/Sonat (281 MMcf/d curtailed), and others, totaling approximately 1.403 Bcf/d of combined capacity reductions across listed locations. ANR has flagged RCC eligibility per Tariff Section 6.36 if primary firm service cannot be scheduled.
ANR Patterson FM removes approximately 1.403 Bcf/d of aggregate Gulf Coast northbound/interconnect capacity through Oct 4, with Patterson to Col Gulf reduced to zero and Shadyside/TGP slashed from ~473 to 30 MMcf/d; expect bullish pressure at ANR La. and Midwest delivery basis while Henry Hub and Gulf Coast onshore basis softens as northbound takeaway tightens.
Reroute: Moderate: TETCO (monitored), Trunkline/TGC (monitored), and CGT (monitored) serve overlapping Gulf Coast northbound corridors, but the scale of reductions across multiple interconnects -- particularly Patterson to Col Gulf zeroed out and Shadyside/TGP cut to 30 MMcf/d -- will stress available alternative capacity and may not fully offset firm service impacts.
ANR Pipeline has posted a planned maintenance outage at the Wheeler Hidetown meter station (Loc #523099) in Wheeler County, Texas, scheduled September 13-18, 2026 (6 days). Capacity at this location will be reduced from 480 MMcf/d to zero, with ANR explicitly warning of 100% curtailments to Firm Primary service based on both current nominations and contracted MDQ. This is a full capacity elimination at a Southwest Area receipt/delivery point affecting all service classes.
ANR Wheeler Hidetown maintenance removes 0.480 Bcf/d of Southwest Area capacity on September 13-18, with 100% Firm Primary curtailments anticipated; expect tightening at ANR ML 7 (Michigan/Wisconsin) delivery basis and modest bearish pressure at Gulf Coast receipt points as northbound takeaway is reduced, with any unaffected competing pipes (TETCO, TGC) as partial mitigation.
Reroute: Moderate: TETCO (monitored), Trunkline/TGC (monitored), and Southern Star (monitored) serve overlapping Gulf Coast-to-Midwest corridors and may absorb displaced volumes, but the 0.480 Bcf/d full curtailment with advance notice gives shippers time to arrange alternatives before the September 13 effective date.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Southwest Area
SEV 3/5
Maintenance0.125 Bcf/dUntil Further Notice6 Days
ANR Pipeline has posted a planned maintenance outage at the Red River Interconnect meter station in Loving County, Texas (LOC #185837) in its Southwest Area, effective September 13–18, 2026 (6 days). The full 125 MMcf/d (0.125 Bcf/d) of capacity at this location will be reduced to zero, with ANR explicitly anticipating 100% curtailments of Firm Primary nominations based on both current net shipper nominations and contracted MDQ. Reservation charge credits will be issued per tariff Section 6.36 if primary firm scheduled quantities cannot be delivered.
ANR planned outage removes 0.125 Bcf/d at Red River Interconnect (Loving County, TX) for 6 days beginning 9/13; 100% firm primary curtailment is anticipated, watch ANR Southwest Area receipt point pressure and mild tightening at ANR ML 7 / Midwest delivery basis if no reroute is arranged by shippers ahead of the gas days.
Reroute: Moderate: TETCO, Trunkline (TGC), and Southern Star serve overlapping Gulf Coast-to-Midwest corridors and could absorb a portion of the 0.125 Bcf/d affected volume; the relatively small size of this restriction improves reroute feasibility, though firm shippers at this specific interconnect meter have no direct bypass on ANR itself.
ANR Pipeline has planned maintenance at Mermentau Compressor Station in Jefferson Parish, Louisiana, reducing Lake Arthur Southbound (LOC #FPLKARSB) capacity by 0.728 Bcf/d from approximately 1.078 Bcf/d to 0.350 Bcf/d during September 22-24 (3 days). ANR explicitly warns this will likely cause curtailments to Firm Primary (estimated 65-67% based on current nominations/contracted MDQ), Firm Secondary, and Interruptible service, triggering reservation charge credit provisions.
ANR Mermentau CS maintenance removes 0.728 Bcf/d of Lake Arthur Southbound capacity (leaving only 0.350 Bcf/d) Sept 22-24, with 65-67% Firm Primary curtailments expected; live capacity data shows FPLKARSB already running at 93.2% utilization with only 0.078 Bcf/d headroom, confirming the segment is tight pre-event and leaving virtually no buffer to absorb the restriction -- expect significant widening of ANR, La. basis and upward pressure on Midwest/Michigan delivery prices.
Reroute: Moderate: Texas Eastern (TETCO), Columbia Gulf (CGT), and Trunkline (TGC) serve overlapping Gulf Coast northbound corridors and could absorb some displaced volumes, but the scale of firm curtailments (65-67% of primary firm) suggests these alternatives will face strong incremental demand and may lack sufficient spare capacity to fully offset the loss.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
LIFTED: NOTICE OF FORCE MAJEURE ANR Pipeline Company – Southeast Area – Patterson Compressor Station
SEV 2/5
lifted ✓Restoration1 Days
ANR Pipeline has lifted the force majeure declaration at Patterson Compressor Station in the Southeast Area, effective 08/19/26. All constrained capacities are being reinstated to full pre-outage levels across eight interconnect locations including Shadyside/Sonat (481 MMcf/d), Shadyside/TGP (473 MMcf/d), Riverway/Bridgeline (165 MMcf/d), and others. The original FM was declared 08/18/26 due to unexpected equipment failure at Unit 2, with restrictions originally scheduled through 08/27/26.
FM lifted at Patterson CS restores aggregate Southeast Area capacity across key interconnects including Shadyside/Sonat at 0.481 Bcf/d and Shadyside/TGP at 0.473 Bcf/d; expect ANR Louisiana basis to ease and any short-term tightness premium in Gulf Coast-to-Midwest corridors to dissipate quickly.
Reroute: High: restoration notice -- reroute no longer relevant; full capacity is being reinstated across all affected Patterson interconnects as of 08/19/26.
Force Majeure1.403 Bcf/dUntil Further Notice10 Days
ANR Pipeline has declared a Force Majeure at Patterson Compressor Station (Southeast Area) due to an unexpected Unit 2 equipment failure, effective 8/18/2026 intraday through 8/27/2026. Eight interconnect locations face curtailed capacity ranging from full elimination (Patterson to Col Gulf, leaving 0 MMcf/d) to partial reductions across Shadyside/TGP, Weeks ISLA, Shadyside/Sonat, and Avalon delivery points. Aggregate stated capacity reductions across the listed locations total approximately 1,403 MMcf/d (1.403 Bcf/d) removed from scheduling, with the Shadyside/TGP (Del) cut of 443 MMcf/d and Weeks ISLA/LIG PL cut of 260 MMcf/d being the largest individual impacts.
ANR Patterson FM removes approximately 1.403 Bcf/d of combined Southeast-area scheduling capacity through 8/27; expect bullish pressure on ANR Louisiana basis and Transco Zone 4 as Gulf Coast northbound flows are curtailed, with the Patterson-to-Col Gulf location going to zero delivery capacity and Shadyside/TGP delivery cut from 473 to 30 MMcf/d -- tightest signal at Southeast and Midwest interconnects receiving from ANR's Louisiana mainline.
Reroute: Moderate: Texas Eastern (TETCO), Trunkline (TGC), and Columbia Gulf Transmission (CGT) serve overlapping Gulf Coast northbound corridors, but the scale of reductions across multiple interconnects -- including a full cut to the Col Gulf interconnect -- limits the ability of any single alternative to absorb displaced volumes. Partial reroute is possible but full offset is unlikely over the 10-day FM window.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION in the Southeast Area – Weeks ISLA/LIG PL
SEV 3/5
Capacity Constraint0.110 Bcf/dUntil Further Notice78 Days
Effective 8/15/26 timely cycle, ANR Pipeline is restricting capacity at Weeks ISLA/LIG PL (LOC#233620) in St. Mary Parish, Louisiana due to incompatible pressures in the Southeast Area. The restriction limits the location to 200 MMcf/d (0.200 Bcf/d), removing 110 MMcf/d (0.110 Bcf/d) of capacity through 10/31/26 -- a 78-day constraint. ANR has flagged potential Firm Secondary and Interruptible curtailments as a result.
ANR removes 0.110 Bcf/d of southbound Gulf Coast receipt capacity at Weeks ISLA/LIG PL through October 31; Firm Secondary and Interruptible curtailments are anticipated, supporting mild bullish pressure at ANR Louisiana and Transco Zone 4 Southeast basis as northbound throughput capacity from this point tightens.
Reroute: Moderate: TETCO (monitored), Trunkline/TGC (monitored), and Gulf South (monitored) provide overlapping Gulf Coast northbound corridors that could absorb some displaced volumes, though these alternatives may not fully offset the restriction if the system area is already running near capacity.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
UPDATED: CAPACITY REDUCTION Michigan Leg South – East Joliet MS
SEV 3/5
Maintenance0.328 Bcf/dUntil Further Notice11 Days
ANR Pipeline has extended planned maintenance on the Michigan Leg South at East Joliet MS (LOC ID #4196, Will County, IL), reducing capacity to zero at that location -- 0.328 Bcf/d offline -- through 8/21 (extended from the prior 8/14 end date). The notice supersedes prior notice 26125010 and warns that Firm Secondary and Interruptible curtailments are anticipated. Live capacity data confirms EAST JOLIET (loc 4196) is posting zero operating capacity and zero scheduled flow as of the 2026-08-13 timely cycle, fully corroborating the outage.
ANR maintenance at East Joliet MS removes 0.328 Bcf/d of Michigan Leg South northbound capacity through 8/21, with Firm Secondary and Interruptible curtailments anticipated; watch for tightening at ANR ML 7 and Chicago Citygate basis as Midwest delivery capacity is reduced, with DEFIANCE WESTBOUND already flagged OVER (120.7% utilization) and LAGRANGE WESTBOUND also OVER (122.2%), signaling system stress on ANR's northern delivery segments.
Reroute: Moderate: TETCO (monitored), NGPL (monitored), and PEPL (monitored) serve overlapping Gulf Coast-to-Midwest and Chicago-area corridors; however, DEFIANCE WESTBOUND and LAGRANGE WESTBOUND are already oversubscribed on ANR itself, suggesting limited spare absorption capacity on adjacent infrastructure as well.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
UPDATED.CAPACITY REDUCTION Michigan Leg North – Bridgman Northbound
SEV 3/5
Maintenance0.679 Bcf/dUntil Further Notice35 Days
ANR Pipeline has updated the dates for planned maintenance at Hamilton Compressor Station in Allegan County, Michigan, shifting the window from 8/11-9/18 to 8/18-9/21. Northbound capacity at Bridgman (LOC #FPBRGMNB) will be reduced by 0.679 Bcf/d, leaving 0.943 Bcf/d available. ANR anticipates potential Firm Primary, Firm Secondary, and Interruptible curtailments, with firm primary impact estimated at 0% based on current nominations but up to 35% based on contracted MDQ.
ANR planned maintenance removes 0.679 Bcf/d of northbound Michigan capacity for 35 days; watch for tightening Michigan/Midwest basis and potential Firm Primary curtailments if nominations rise toward contracted MDQ.
Reroute: Moderate: TETCO, TGT, and PEPL serve overlapping Gulf Coast-to-Midwest corridors, though Michigan-specific northbound deliveries on this ANR leg have limited direct bypass options.
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ANR Pipeline (TC Energy)
UPDATED: CAPACITY REDUCTION Michigan Leg North – Rabbit River MS
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
UPDATED.CAPACITY REDUCTION Michigan Leg North – Bridgman Northbound
SEV 3/5
Maintenance0.679 Bcf/dUntil Further Notice38 Days
ANR has updated the scheduled maintenance window at Hamilton Compressor Station in Allegan County, Michigan, shifting the dates from August 6 - September 14 to August 11 - September 18, 2026. The Bridgman Northbound location (LOC #FPBRGMNB) will be restricted to 943 MMcf/d, a reduction of 0.679 Bcf/d. ANR explicitly anticipates potential Firm Primary, Firm Secondary, and Interruptible curtailments, with up to 35% of contracted MDQ at risk for firm primary shippers based on contracted volumes.
ANR planned maintenance removes 0.679 Bcf/d of northbound capacity at Bridgman through September 18; with firm primary curtailments possible at 35% of MDQ, expect mild bullish pressure on Michigan/Midwest delivered basis and watch PEPL and TGT as alternative Midwest supply routes.
Reroute: Moderate: TETCO, PEPL, and TGT serve overlapping Gulf Coast-to-Midwest corridors and can absorb some displaced volumes, though a 0.679 Bcf/d northbound restriction on a major Midwest artery may strain available alternatives during late-summer shoulder demand.
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ANR Pipeline (TC Energy)
UPDATED: CAPACITY REDUCTION Michigan Leg North – Rabbit River MS
SEV 4/5
Maintenance0.083 Bcf/dUntil Further Notice39 Days
ANR Pipeline has updated the maintenance window for the Rabbit River Meter Station (LOC #523093) in Allegan County, Michigan on the Michigan Leg North. The outage now runs August 11 through September 18, 2026 (shifted from the original August 6 to September 14 window), reducing capacity to zero MMcf/d and eliminating all 83 MMcf/d of throughput. ANR explicitly warns of 100% curtailment impact on Firm Primary service based on both current nominations and contracted MDQ.
ANR Michigan Leg North maintenance eliminates all 0.083 Bcf/d at Rabbit River MS through September 18, with 100% firm primary curtailment confirmed; watch for tightening Michigan/Midwest basis and potential reservation charge credit activity indicating shipper distress.
Reroute: Limited: the Rabbit River MS is a local Michigan delivery point on the Michigan Leg North, a specific lateral with limited bypass options; TETCO, PEPL, and Southern Star do not serve this same downstream Michigan local distribution market, so full reroute is unlikely for customers directly served by this meter station.
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ANR Pipeline (TC Energy)
UPDATED: CAPACITY REDUCTION Michigan Leg North – Rabbit River MS
SEV 4/5
Maintenance0.083 Bcf/dUntil Further Notice38 Days
ANR Pipeline has updated maintenance dates for the Michigan Leg North at Rabbit River Meter Station (Allegan County, MI), shifting the window from 8/6-9/14 to 8/11-9/18/2026. Capacity at LOC #523093 is reduced to 0 MMcf/d from 83 MMcf/d for the full duration -- a complete shutoff. ANR explicitly warns of 100% curtailment of Firm Primary nominations and contracted MDQ, making this a full firm curtailment event despite being planned maintenance.
Complete 0.083 Bcf/d firm primary curtailment at Rabbit River MS through 9/18 will tighten Michigan/Midwest local delivery basis; shippers should seek alternative ANR receipt paths or competing pipelines (PEPL, TGT) immediately as 100% of contracted MDQ is at risk.
Reroute: Moderate: ANR serves overlapping Michigan/Midwest markets with PEPL and TGT providing partial alternatives, but Rabbit River MS delivers into a specific Allegan County, MI local distribution area where bypass options may be geographically limited.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
UPDATED: CAPACITY REDUCTION Michigan Leg North – Rabbit River MS
SEV 4/5
Maintenance0.083 Bcf/dUntil Further Notice40 Days
ANR Pipeline has rescheduled planned maintenance on the Michigan Leg North at Rabbit River Meter Station (Allegan County, MI), shifting the window from 7/30-8/24 to 8/6-9/14. During this 40-day period, capacity at Loc #523093 is reduced to zero from 83 MMcf/d (0.083 Bcf/d), with 100% curtailment of firm primary service expected based on both current nominations and contracted MDQ. This supersedes prior notice 26116014.
ANR removes 0.083 Bcf/d of firm delivery capacity at Rabbit River MS through 9/14, with 100% firm primary curtailment anticipated; expect tightening of Michigan/Midwest local basis and potential shipper displacement into alternative Midwest supply paths for the extended 40-day window.
Reroute: Moderate: ANR serves overlapping Midwest/Michigan markets alongside PEPL, TGT, and TETCO, which may absorb some displaced volumes, though Rabbit River MS serves specific local Allegan County distribution points that may have limited bypass options within the Michigan Leg North segment.
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ANR Pipeline (TC Energy)
UPDATED: CAPACITY REDUCTION Southeast Mainline – Cottage Grove Southbound
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Michigan Leg South – East Joliet MS
SEV 3/5
Maintenance0.328 Bcf/dUntil Further Notice4 Days
ANR Pipeline has planned maintenance at East Joliet Meter Station (LOC ID#4196) in Will County, IL from August 11-14, 2026. The full 0.328 Bcf/d capacity at this location will be reduced to zero for the four-day window. ANR explicitly anticipates Firm Secondary and Interruptible curtailments as a result.
ANR East Joliet MS goes to zero for 0.328 Bcf/d over Aug 11-14; expect bullish pressure at Chicago Citygate and Midwest basis points as northbound Michigan Leg South deliveries are curtailed, with Firm Secondary and Interruptible shippers at greatest risk.
Reroute: Moderate: TETCO, PEPL, and Southern Star serve overlapping Gulf Coast-to-Midwest corridors and may absorb some displaced volumes, though full replacement of 0.328 Bcf/d at this specific Illinois delivery point is unlikely given localized Michigan Leg South distribution.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Michigan Leg South – Crown Point MS
SEV 3/5
Maintenance0.326 Bcf/dUntil Further Notice5 Days
ANR Pipeline has planned maintenance at Crown Point Meter Station (LOC #138744) in Lake County, Indiana on the Michigan Leg South from August 17-21, 2026. The outage eliminates the full 326 MMcf/d of capacity at this location, leaving 0 MMcf/d available for the 5-day window. ANR explicitly anticipates Firm Secondary and Interruptible curtailments as a result.
ANR Michigan Leg South loses 0.326 Bcf/d at Crown Point MS for five days (8/17-8/21), with firm secondary and interruptible curtailments expected; watch for tightening Chicago Citygate and Midwest basis as Gulf Coast northbound ANR throughput is constrained, with partial reroute pressure onto TETCO and PEPL.
Reroute: Moderate: TETCO, Panhandle Eastern (PEPL), and Trunkline (TGC) serve overlapping Gulf Coast-to-Midwest corridors and can absorb some diverted volumes, though simultaneous summer demand may limit available spare capacity on these alternatives.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Michigan Leg South - St. John Eastbound
SEV 4/5
Maintenance0.750 Bcf/dUntil Further Notice5 Days
ANR Pipeline has planned maintenance on the Michigan Leg South segment at St. John Eastbound (LOC #FPSTJNEB) from 8/30 through 9/3/2026. Capacity is reduced by 545 MMcf/d (leaving 780 MMcf/d) on 8/30-8/31, then by 750 MMcf/d (leaving 575 MMcf/d) on 9/1-9/3. ANR explicitly warns of Firm Primary, Firm Secondary, and Interruptible curtailments, with firm primary impact estimated at 10-45% on 8/30-8/31 and 34-59% on 9/1-9/3 based on contracted MDQ.
ANR Michigan Leg South eastbound reduction of up to 0.750 Bcf/d with confirmed firm primary curtailment risk (up to 59% of contracted MDQ on 9/1-9/3) tightens Gulf Coast-to-Midwest flows and is bullish for Chicago Citygate and Midwest basis versus Henry Hub during the affected gas days.
Reroute: Moderate: TETCO, PEPL, and TGT serve overlapping Gulf Coast-to-Midwest corridors, but the scale of firm primary curtailments (up to 59% of contracted MDQ) may exceed available alternative capacity on those systems, particularly during late-August/early-September shoulder demand.
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ANR Pipeline (TC Energy)
LIFTED CAPACITY REDUCTION Non-Performance at Patterson/Neptune (LOC #505655) - Southeast Area
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
Updated: NOTICE OF FORCE MAJEURE ANRPL – Michigan Leg South – Fallen Timbers (LOC#523086)
SEV 1/5
Informational
Not scored -- last_updated is more than 24h old, treated as historical backlog rather than a live trading signal. No Claude API call was made for this notice.
Not scored -- notice too old to be actionable.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
NOTICE OF FORCE MAJEURE ANRPL – Michigan Leg South – Fallen Timbers (LOC#523086)
SEV 1/5
Informational
Not scored -- last_updated is more than 24h old, treated as historical backlog rather than a live trading signal. No Claude API call was made for this notice.
Not scored -- notice too old to be actionable.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
ICE Measurement Application Access Issue
SEV 1/5
Informational
Not scored -- last_updated is more than 24h old, treated as historical backlog rather than a live trading signal. No Claude API call was made for this notice.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
UPDATED.CAPACITY REDUCTION Michigan Leg North – Bridgman Northbound
SEV 3/5
Maintenance0.679 Bcf/dUntil Further Notice26 Days
ANR Pipeline has updated planned maintenance at Hamilton Compressor Station in Allegan County, Michigan, shifting the start date to July 30 from July 28 and confirming a 0.679 Bcf/d capacity reduction on the Bridgman Northbound segment (LOC #FPBRGMNB), leaving 0.943 Bcf/d available. The outage runs July 30 through August 24, 2026 (26 days). ANR warns of potential Firm Primary, Firm Secondary, and Interruptible curtailments, estimating up to 35% impact on contracted MDQ though current nominations show 0% firm impact.
ANR Bridgman Northbound reduction of 0.679 Bcf/d through August 24 tightens northbound Gulf Coast-to-Midwest takeaway; watch for mild bearish pressure at Henry Hub and Gulf Coast origin points with modest bullish signal at Michigan/Chicago Citygate basis, though zero current firm nomination impact limits near-term price effect.
Reroute: Moderate: TETCO, Trunkline (TGC), and Panhandle Eastern (PEPL) serve overlapping Gulf Coast-to-Midwest corridors and can absorb some displaced volumes, though a 0.679 Bcf/d reduction is material and may not be fully offset if those pipes are running near capacity in summer.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Michigan Leg North – Rabbit River MS
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Non-Performance at Patterson/Neptune (LOC #505655) - Southeast Area
SEV 5/5
Capacity Constraint0.500 Bcf/dUntil Further Notice
ANR Pipeline has declared a critical capacity restriction effective immediately at the Patterson/Neptune receipt location (LOC #505655) in St. Mary Parish, Louisiana, due to non-performance. Starting 7/23 and until further notice, scheduled capacity is reduced by 0.500 Bcf/d, leaving only 0.100 Bcf/d available at this location. ANR explicitly anticipates Firm Primary, Firm Secondary, and Interruptible curtailments -- all service classes are at risk.
ANR restricts 0.500 Bcf/d at Patterson/Neptune (SE Louisiana) with firm primary curtailments anticipated and no restoration timeline; expect bearish Henry Hub pressure as Gulf Coast northbound takeaway backs up, with potential bullish signal at Midwest/Chicago markets losing this supply.
Reroute: Moderate: TETCO, Trunkline (TGC), and Southern Natural (EGT) serve overlapping Gulf Coast northbound corridors, but the 0.500 Bcf/d reduction at a single receipt point is large relative to typical spare capacity and firm curtailments across all service classes suggest limited ability to absorb volumes at alternative paths without congestion.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION - Southeast Area – Eunice Compressor Station
SEV 4/5
Maintenance2.265 Bcf/dUntil Further Notice7 Days
ANR Pipeline has planned maintenance at Eunice Compressor Station in Acadia Parish, Louisiana (Southeast Area) from August 4-10, 2026, resulting in firm primary, firm secondary, and interruptible curtailments. Nine delivery and interconnect locations face full or near-full capacity reductions totaling approximately 2.265 Bcf/d of constrained capacity, with Pine Prairie South Del completely shut (0.6 Bcf/d) and major curtailments at Shadyside/Sonat (0.431 Bcf/d to 0.150 remaining) and Shadyside/TGP (0.443 Bcf/d to 0.030 remaining). ANR estimates firm primary impact at 10% of current net nominations and 27% of contracted MDQ.
ANR Eunice CS maintenance removes approximately 2.265 Bcf/d of Southeast Area delivery capacity for 7 days (8/4-8/10), with firm primary curtailments affecting key interconnects to CGT (Columbia Gulf), TGP, Sonat/SNG, and Trunkline; expect bullish pressure at Henry Hub and Transco Zone 4 as Gulf Coast supply access tightens, with widening ANR Southeast-to-Midwest basis.
Reroute: Moderate: TETCO (monitored), Trunkline/TGC (monitored), and Southern Natural/SNG (EGT, monitored) serve overlapping Gulf Coast northbound corridors, but the scale of curtailments across multiple interconnects simultaneously -- including the Patterson/Trunkline and Patterson/Col Gulf links -- significantly limits the ability of alternatives to absorb the full volume; partial reroute possible but not sufficient to fully offset 2.265 Bcf/d of constrained capacity.
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ANR Pipeline (TC Energy)
Assessment of Extreme Condition 7/14/26 – 7/16/26 with Extreme Condition Penalty Waiver
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
UPDATED CAPACITY REDUCTION Michigan Leg South – Joliet (NGPL)
SEV 4/5
Maintenance0.025 Bcf/dUntil Further Notice24 Days
ANR Pipeline has extended unplanned maintenance on the Michigan Leg South at the Joliet NGPL interconnect (LOC #2610) in Will County, Illinois, now running from 7/8 through 7/31 (extended from the prior 7/12 end date). Capacity at Joliet NGPL is reduced to 0 MMcf/d from 25 MMcf/d, a complete elimination of deliveries at this location. ANR explicitly anticipates 100% curtailments of Firm Primary, Firm Secondary, and Interruptible service based on both current nominations and contracted MDQ.
ANR unplanned outage eliminates all 0.025 Bcf/d of Joliet NGPL deliveries through 7/31 with 100% firm primary curtailments confirmed; expect bullish pressure at Chicago Citygate and NGPL Midcontinent basis as this supply point goes fully dark for the remainder of the month.
Reroute: Moderate: NGPL, PEPL, and TETCO serve overlapping Gulf Coast-to-Midwest corridors and may absorb some displaced volume, though 100% firm primary curtailments at this specific Joliet interconnect point mean affected shippers must actively seek alternative paths and may face higher basis costs.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION Michigan Leg South – Joliet (NGPL)
SEV 4/5
Maintenance0.025 Bcf/dUntil Further Notice5 Days
ANR Pipeline has declared an unplanned maintenance event on the Michigan Leg South at the Joliet NGPL interconnect (LOC #2610), effective intraday 7/8/2026 through 7/12/2026. The full 25 MMcf/d (0.025 Bcf/d) capacity at this location is reduced to zero, with 100% curtailment of Firm Primary service based on both current net shipper nominations and contracted MDQ. ANR is cutting previously scheduled volumes beginning Gas Day 7/8/2026 and will issue reservation charge credits per tariff Section 6.36 if firm capacity cannot be delivered.
Unplanned ANR Michigan Leg South outage eliminates 0.025 Bcf/d at the Joliet NGPL interconnect with 100% firm primary curtailments through 7/12, tightening NGPL Chicago/Midwest receipts from ANR and widening Chicago Citygate basis vs Henry Hub.
Reroute: Moderate: NGPL, PEPL, and TETCO serve overlapping Gulf Coast-to-Midwest corridors and may absorb some displaced volumes, though the complete elimination of this specific ANR-to-NGPL interconnect point limits direct substitution for shippers relying on this delivery location.
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ANR Pipeline (TC Energy)
Notice of Phase 1 Warm Weather Operational Conditions (Posted: 7/8/26)
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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ANR Pipeline (TC Energy)
CAPACITY REDUCTION - Southeast Area – Eunice Compressor Station
SEV 4/5
Maintenance1.611 Bcf/dUntil Further Notice2 Days
ANR Pipeline has planned maintenance at Eunice Compressor Station in the Southeast Area on 3/18-3/19, resulting in curtailments across eight interconnect locations totaling approximately 1.611 Bcf/d of reduced capacity. Affected locations include major interconnects with TGP (443 MMcf/d reduced to 30 MMcf/d), Sonat/SNG (377 MMcf/d reduced to 110 MMcf/d), Weeks Island/LIG (270 MMcf/d reduced to 40 MMcf/d), and Col Gulf (143 MMcf/d reduced to 0 MMcf/d). ANR explicitly anticipates Firm Primary, Firm Secondary, and Interruptible curtailments, meaning all service classes are at risk.
ANR Eunice CS planned outage removes approximately 1.611 Bcf/d of Southeast Area capacity for 3/18-3/19, with firm primary curtailments explicitly anticipated; expect tightening at Transco Zone 4, SNG/Sonat, and TGP Southeast interconnects, with bullish basis pressure across Gulf Coast-to-Southeast delivery corridors.
Reroute: Limited: the Eunice CS constraint simultaneously affects ANR interconnects with both SNG/Sonat and TGP -- the two primary competing Southeast pipelines -- reducing the ability of shippers to reroute curtailed volumes; TETCO and CGT provide partial Gulf Coast northbound alternatives but are unlikely to absorb the full 1.6 Bcf/d reduction.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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About ANR Pipeline
Serves Upper Midwest utilities with one of the largest storage portfolios in the U.S., in Michigan; its Southeast leg can also carry gas south to the Gulf Coast.
Operated by
TC Energy
Runs
Louisiana and the Midcontinent (Oklahoma, Texas, Kansas) to Wisconsin, Michigan and Illinois
Trading points
ANR SE, ANR SW, Michigan, Chicago
Mapped facilities
Havensville, Eunice, Lake Arthur, Patterson, St. John, Hamilton, Crystal Falls
Line from EIA pipeline data; dots are facilities named in this pipeline’s notices (HIFLD locations). Dashed lines are schematic.
