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Great Lakes Gas Transmission

20 active notices · AI-scored for market impact

How Critical Notices work →

Great Lakes Gas Transmission (U.S.): 20 active notices, none rated severity 4–5 (highest 3/5); 3 posted in the last 7 days. 1 outage in effect today (no volume stated) at Richfield Loc 482605, expected back Dec 1. Capacity Offline →

Active Notices Showing 20 notices

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Great Lakes Gas Transmission

December 2026 Transporter's Use Schedule Notice

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-11-12 20:43 UTC  |  Rev. 3  |  ID: 1264 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 11/12/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-11-12 19:22 UTC  |  Rev. 1  |  ID: 1265 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 11/6/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-11-06 14:51 UTC  |  Rev. 1  |  ID: 1263 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 11/2/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-11-02 15:46 UTC  |  Rev. 1  |  ID: 1261 Direction: Neutral
Great Lakes Gas Transmission

UPDATED: CAPACITY REDUCTION GLGT – Emerson Eastbound (Posted: 10/28/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-11-02 14:33 UTC  |  Rev. 1  |  ID: 1260 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 10/26/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-10-26 15:55 UTC  |  Rev. 1  |  ID: 1258 Direction: Neutral
Great Lakes Gas Transmission

Seasonal Rates April 2026 – March 2027 - Updated Pursuant to Settlement

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-10-20 18:10 UTC  |  Rev. 1  |  ID: 1256 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 10/20/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-10-20 14:45 UTC  |  Rev. 1  |  ID: 1255 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 10/20/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-10-20 14:35 UTC  |  Rev. 1  |  ID: 1254 Direction: Neutral
Great Lakes Gas Transmission

November 2026 Transporter's Use Schedule

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-10-18 12:47 UTC  |  Rev. 1  |  ID: 1252 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 10/12/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-10-15 12:45 UTC  |  Rev. 3  |  ID: 1245 Direction: Neutral
Great Lakes Gas Transmission

November 2026 Transporter's Use Schedule Notice

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
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Posted: 2026-10-14 17:30 UTC  |  Rev. 1  |  ID: 1251 Direction: Neutral
Great Lakes Gas Transmission

November 2026 Transporter's Use Schedule Notice

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
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Posted: 2026-10-12 23:30 UTC  |  Rev. 1  |  ID: 1248 Direction: Neutral
Great Lakes Gas Transmission

MAINTENANCE SCHEDULE for Great Lakes Gas Transmission (Posted: 10/5/26)

SEV 2/5
Informational

Pre-screen severity 2 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
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Posted: 2026-10-08 15:31 UTC  |  Rev. 3  |  ID: 1244 Direction: Neutral
Great Lakes Gas Transmission

CAPACITY REDUCTION at Richfield

SEV 3/5
Capacity Constraint 0.029 Bcf/d

Great Lakes Gas Transmission has declared a Critical Notice effective 10/1/2026 intraday, restricting capacity at Richfield (LOC#482605) to 0 MMcf/d due to gas quality tariff compliance issues, until further notice. The operating capacity at this receipt point is 0.029 Bcf/d, now fully curtailed, with GLGT warning of potential Firm Secondary and Interruptible curtailments. Duration is indeterminate with no restoration timeline given.

GLGT Richfield receipt point (0.029 Bcf/d) is restricted to zero capacity for gas quality compliance on an until-further-notice basis, tightening Canadian import flows into the Upper Midwest and pressuring Emerson/Viking GL and Chicago basis mildly higher, though the small absolute volume limits broader HH impact.
Reroute: Moderate: ANR and TransCanada Mainline interconnects serve overlapping Upper Midwest and Dawn markets, but rerouting depends on available capacity at those interconnects and shipper access; the small volume involved (0.029 Bcf/d) limits systemic reroute urgency.
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Posted: 2026-10-01 17:41 UTC  |  Rev. 1  |  ID: 1241 Capacity: 0.029 Bcf/d  |  Direction: Bullish
Great Lakes Gas Transmission

UPDATED: CAPACITY REDUCTION GLGT – Emerson Eastbound (Posted: 9/23/26)

SEV 3/5
Informational

Pre-screen severity 3 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-09-23 13:46 UTC  |  Rev. 1  |  ID: 1234 Direction: Neutral
Great Lakes Gas Transmission

CAPACITY REDUCTION GLGT – Shevlin CS3 (Posted: 9/23/26)

SEV 3/5
Informational

Pre-screen severity 3 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-09-23 13:01 UTC  |  Rev. 1  |  ID: 1233 Direction: Neutral
Great Lakes Gas Transmission

Supported Price Index Reference

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-08-11 15:56 UTC  |  Rev. 1  |  ID: 180 Direction: Neutral
Great Lakes Gas Transmission

Seasonal Rates April 2026 – March 2027

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
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Posted: 2026-08-11 15:56 UTC  |  Rev. 1  |  ID: 1184 Direction: Neutral
Great Lakes Gas Transmission

Great Lakes Stipulation and Agreement of Settlement Filed

SEV 1/5
Informational

Pre-screen severity 1 -- below full-score threshold.

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Posted: 2026-08-11 15:56 UTC  |  Rev. 1  |  ID: 1196 Direction: Neutral

About Great Lakes Gas Transmission

Carries Canadian gas across the Upper Midwest and into Michigan, and links Western Canadian supply to the Dawn hub in Ontario.

Operated by
TC Energy
Runs
The Manitoba border at Emerson across Minnesota, Wisconsin and Michigan to the Ontario border at St. Clair
Trading points
Emerson, Michigan Consolidated, Dawn
Mapped facilities
Rapid River, Thief River
Great Lakes Gas TransmissionRapid RiverThief River

Line from EIA pipeline data; dots are facilities named in this pipeline’s notices (HIFLD locations). Dashed lines are schematic.

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