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Gas Transmission Northwest

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Gas Transmission Northwest

UPDATED: CAPACITY REDUCTION: GTN – Station 6 CFTP (Posted: 8/18/26)

SEV 3/5
Informational Until Further Notice

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

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Reroute: Not assessed.
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Notice Category: Critical
Notice Type: Maint
Notice Status: Initiate
Posting Date/Time: 08/18/2026 15:25
Notice Eff Date/Time: 08/18/2026 15:25

Subject: UPDATED: CAPACITY REDUCTION:  GTN – Station 6 CFTP (Posted: 8/18/26)
Posted: 2026-08-22 11:32 UTC  |  Rev. 2  |  ID: 1618 Direction: Neutral
Gas Transmission Northwest

CAPACITY REDUCTION: GTN – Flow Past Kingsgate (Posted: 8/20/26)

SEV 3/5
Informational Until Further Notice

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

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Reroute: Not assessed.
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Notice Category: Critical
Notice Type: Maint
Notice Status: Initiate
Posting Date/Time: 08/20/2026 09:25
Notice Eff Date/Time: 08/21/2026 09:00

Subject: CAPACITY REDUCTION:  GTN – Flow Past Kingsgate (Posted: 8/20/26)
Posted: 2026-08-23 15:48 UTC  |  Rev. 2  |  ID: 1620 Direction: Neutral
Gas Transmission Northwest

CAPACITY REDUCTION: GTN – Flow Past Kingsgate (Posted: 9/10/26)

SEV 3/5
Informational Until Further Notice

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

Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
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Notice Category: Critical
Notice Type: Maint
Notice Status: Initiate
Posting Date/Time: 09/10/2026 09:42
Notice Eff Date/Time: 09/10/2026 09:45

Subject: CAPACITY REDUCTION:  GTN – Flow Past Kingsgate (Posted: 9/10/26)
Posted: 2026-09-13 15:48 UTC  |  Rev. 2  |  ID: 1637 Direction: Neutral
Gas Transmission Northwest

OFO Watch: GTN Low Inventory (Posted 8/1/26)

SEV 2/5
Informational

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

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Reroute: Not assessed.
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Notice Category: Critical
Notice Type: OFO
Notice Status: Initiate
Posting Date/Time: 08/01/2026 17:50
Notice Eff Date/Time: 08/01/2026 17:50

Subject: OFO Watch:  GTN Low Inventory (Posted 8/1/26)
Posted: 2026-08-15 11:32 UTC  |  Rev. 2  |  ID: 1608 Direction: Neutral
Gas Transmission Northwest

MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 8/11/26)

SEV 2/5
Informational

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

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Notice Category: Planned Service Outage
Notice Type: Plnd Outage
Notice Status: Supersede
Posting Date/Time: 08/11/2026 15:50
Notice Eff Date/Time: 08/11/2026 15:50
Prior Notice ID: 1612

Subject: MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 8/11/26)
Posted: 2026-08-21 17:17 UTC  |  Rev. 329  |  ID: 1615 Direction: Neutral
Gas Transmission Northwest

OFO Watch: GTN Low Inventory (Posted 8/1/26)

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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Notice Category: Critical
Notice Type: OFO
Notice Status: Supersede
Posting Date/Time: 08/21/2026 10:10
Notice Eff Date/Time: 08/21/2026 10:10
Prior Notice ID: 1608

Subject: OFO Watch:  GTN Low Inventory (Posted 8/1/26)
Posted: 2026-08-24 15:57 UTC  |  Rev. 2  |  ID: 1621 Direction: Neutral
Gas Transmission Northwest

MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 8/21/26)

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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Notice Category: Planned Service Outage
Notice Type: Plnd Outage
Notice Status: Supersede
Posting Date/Time: 08/21/2026 12:35
Notice Eff Date/Time: 08/21/2026 12:35
Prior Notice ID: 1615

Subject: MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 8/21/26)
Posted: 2026-08-24 23:32 UTC  |  Rev. 9  |  ID: 1622 Direction: Neutral
Gas Transmission Northwest

UPDATED: CAPACITY REDUCTION: GTN – Flow Past Kingsgate (Posted: 8/27/26)

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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Notice Category: Critical
Notice Type: Maint
Notice Status: Supersede
Posting Date/Time: 08/27/2026 13:40
Notice Eff Date/Time: 08/27/2026 13:40
Prior Notice ID: 1623

Subject: UPDATED: CAPACITY REDUCTION:  GTN – Flow Past Kingsgate (Posted: 8/27/26)
Posted: 2026-08-30 21:48 UTC  |  Rev. 2  |  ID: 1626 Direction: Neutral
Gas Transmission Northwest

MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 8/24/26)

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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Notice Category: Planned Service Outage
Notice Type: Plnd Outage
Notice Status: Supersede
Posting Date/Time: 08/24/2026 18:40
Notice Eff Date/Time: 08/24/2026 18:40
Prior Notice ID: 1622

Subject: MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 8/24/26)
Posted: 2026-09-03 18:47 UTC  |  Rev. 239  |  ID: 1624 Direction: Neutral
Gas Transmission Northwest

UPDATED: CAPACITY REDUCTION: GTN – Flow Past Kingsgate (Posted: 9/2/26)

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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Notice Category: Critical
Notice Type: Maint
Notice Status: Supersede
Posting Date/Time: 09/02/2026 16:50
Notice Eff Date/Time: 09/02/2026 16:50
Prior Notice ID: 1626

Subject: UPDATED: CAPACITY REDUCTION:  GTN – Flow Past Kingsgate (Posted: 9/2/26)
Posted: 2026-09-06 00:50 UTC  |  Rev. 2  |  ID: 1630 Direction: Neutral
Gas Transmission Northwest

MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 9/3/26)

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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Notice Category: Planned Service Outage
Notice Type: Plnd Outage
Notice Status: Supersede
Posting Date/Time: 09/03/2026 14:00
Notice Eff Date/Time: 09/03/2026 14:00
Prior Notice ID: 1624

Subject: MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 9/3/26)
Posted: 2026-09-10 18:02 UTC  |  Rev. 213  |  ID: 1631 Direction: Neutral
Gas Transmission Northwest

HIGHER BTU GAS on GTN (Posted: 9/10/26)

SEV 2/5
Informational

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

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Reroute: Not assessed.
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Notice Category: Critical
Notice Type: Gas Qual
Notice Status: Initiate
Posting Date/Time: 09/10/2026 09:03
Notice Eff Date/Time: 09/10/2026 09:10

Subject: HIGHER BTU GAS on GTN (Posted: 9/10/26)
Posted: 2026-09-13 15:48 UTC  |  Rev. 2  |  ID: 1636 Direction: Neutral
Gas Transmission Northwest

MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 9/10/26)

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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Notice Category: Critical
Notice Type: Plnd Outage
Notice Status: Supersede
Posting Date/Time: 09/10/2026 16:11
Notice Eff Date/Time: 09/10/2026 16:15
Prior Notice ID: 1631

Subject: MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 9/10/26)
Posted: 2026-09-22 12:47 UTC  |  Rev. 508  |  ID: 1638 Direction: Neutral
Gas Transmission Northwest

MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 9/22/26)

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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TSP Name: Gas Transmission Northwest LLC
Notice ID: 1644
TSP: 006912885
Notice Type: Plnd Outage
Notice Status: Supersede
Posting Date/Time: 09/22/2026 07:45
Notice Eff Date: 09/22/2026
Notice Eff Time: 07:45
Notice End Date: 11/01/2026
Notice End Time: 08:59
Critical: Yes
Required Response: No response required
Prior Notice ID: 1638

Subject: MAINTENANCE SCHEDULE for Gas Transmission Northwest (Posted: 9/22/26)

Message Text:
Gas Transmission Northwest Maintenance Schedule has been updated. Please refer to the maintenance schedule for the projected capacity impacts. Updated item is as follows: • Completed – Idaho A line 3-1 to 3-2 Hydro test Please note that the information posted is proposed and subject to change. Please refer to the EBB for any additional impacts. Please direct any questions to your Account Coordinator, Customer Service Representative, or the Nominations and Scheduling hotline @ 888-750-6275.

Attachments: GTN Planned Maintenance Schedule 20260921.pdf
Posted: 2026-09-22 12:47 UTC  |  Rev. 1  |  ID: 1644 Direction: Neutral
Gas Transmission Northwest

GTN Open Season for Sep 2026 capacity closes at 12:00 PM CT on August 11, 2026

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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Notice Category: Non-Critical
Notice Type: TSP Cap Offer
Notice Status: Initiate
Posting Date/Time: 08/06/2026 08:44
Notice Eff Date/Time: 08/06/2026 12:00
Response Date/Time: 08/11/2026 12:00

Subject: GTN Open Season for Sep 2026 capacity closes at 12:00 PM CT on August 11, 2026
Posted: 2026-08-15 11:32 UTC  |  Rev. 2  |  ID: 1610 Direction: Neutral
Gas Transmission Northwest

AUGUST 2026 - GTN Fuel and Line Loss Percentage

SEV 1/5
Informational

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

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Reroute: Not assessed.
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Notice Category: Non-Critical
Notice Type: Rates-Chrgs
Notice Status: Initiate
Posting Date/Time: 07/18/2026 06:00
Notice Eff Date/Time: 07/18/2026 06:00

Subject: AUGUST 2026 - GTN Fuel and Line Loss Percentage
Posted: 2026-08-15 11:32 UTC  |  Rev. 2  |  ID: 1603 Direction: Neutral
Gas Transmission Northwest

Rate Summary, Effective June 1, 2026

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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Notice Category: Non-Critical
Notice Type: Rates-Chrgs
Notice Status: Initiate
Posting Date/Time: 05/14/2026 12:10
Notice Eff Date/Time: 05/14/2026 12:30

Subject: Rate Summary, Effective June 1, 2026
Posted: 2026-08-15 11:32 UTC  |  Rev. 2  |  ID: 1571 Direction: Neutral
Gas Transmission Northwest

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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Notice Category: Non-Critical
Notice Type: Cap Rel
Notice Status: Initiate
Posting Date/Time: 05/24/2019 14:50
Notice Eff Date/Time: 05/24/2019 14:55

Subject: Supported Price Index Reference
Posted: 2026-08-15 11:32 UTC  |  Rev. 2  |  ID: 466 Direction: Neutral
Gas Transmission Northwest

Credit Contacts/Credit Forms

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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Notice Category: Non-Critical
Notice Type: Cred Contacts
Notice Status: Initiate
Posting Date/Time: 07/29/2016 06:35
Notice Eff Date/Time: 07/29/2016 06:36

Subject: Credit Contacts/Credit Forms
Posted: 2026-08-15 11:32 UTC  |  Rev. 2  |  ID: 113 Direction: Neutral
Gas Transmission Northwest

Open Season: Nov26-Mar27 K-M and Nov26-Jun27 TF-K MC closes 12:00 PM CT 8/20/26

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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Notice Category: Non-Critical
Notice Type: TSP Cap Offer
Notice Status: Initiate
Posting Date/Time: 08/12/2026 09:24
Notice Eff Date/Time: 08/12/2026 12:00
Response Date/Time: 08/20/2026 12:00

Subject: Open Season: Nov26-Mar27 K-M and Nov26-Jun27 TF-K MC closes 12:00 PM CT 8/20/26
Posted: 2026-08-15 15:48 UTC  |  Rev. 2  |  ID: 1616 Direction: Neutral
Gas Transmission Northwest

SEPTEMBER 2026 - GTN Fuel and Line Loss Percentage

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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Notice Category: Non-Critical
Notice Type: Rates-Chrgs
Notice Status: Initiate
Posting Date/Time: 08/20/2026 06:00
Notice Eff Date/Time: 08/20/2026 06:00

Subject: SEPTEMBER 2026 - GTN Fuel and Line Loss Percentage
Posted: 2026-08-23 12:49 UTC  |  Rev. 2  |  ID: 1619 Direction: Neutral
Gas Transmission Northwest

Open Season Dec26-Mar27 K-M and Jan27-April27 TF-K MC closes 12:00 PM CT 9/10/26

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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Notice Category: Non-Critical
Notice Type: TSP Cap Offer
Notice Status: Initiate
Posting Date/Time: 08/26/2026 10:07
Notice Eff Date/Time: 08/26/2026 12:00
Response Date/Time: 09/10/2026 12:00

Subject: Open Season Dec26-Mar27 K-M and Jan27-April27 TF-K MC closes 12:00 PM CT 9/10/26
Posted: 2026-08-29 15:48 UTC  |  Rev. 2  |  ID: 1625 Direction: Neutral
Gas Transmission Northwest

Credit Contacts/Credit Forms

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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Notice Category: Non-Critical
Notice Type: Cred Contacts
Notice Status: Supersede
Posting Date/Time: 08/31/2026 16:25
Notice Eff Date/Time: 09/01/2026 08:00
Prior Notice ID: 113

Subject: Credit Contacts/Credit Forms
Posted: 2026-09-04 02:32 UTC  |  Rev. 2  |  ID: 1629 Direction: Neutral
Gas Transmission Northwest

Open Season for October 2026 capacity closes at 12:00 PM CT on September 17 2026

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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Notice Category: Non-Critical
Notice Type: TSP Cap Offer
Notice Status: Initiate
Posting Date/Time: 09/10/2026 08:26
Notice Eff Date/Time: 09/10/2026 12:00
Response Date/Time: 09/17/2026 12:00

Subject: Open Season for October 2026 capacity closes at 12:00 PM CT on September 17 2026
Posted: 2026-09-13 15:48 UTC  |  Rev. 2  |  ID: 1635 Direction: Neutral
Gas Transmission Northwest

Revised Rate Summary, Effective June 1, 2026

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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Notice Category: Non-Critical
Notice Type: Rates-Chrgs
Notice Status: Initiate
Posting Date/Time: 09/15/2026 10:19
Notice Eff Date/Time: 09/15/2026 10:30

Subject: Revised Rate Summary, Effective June 1, 2026
Posted: 2026-09-18 15:47 UTC  |  Rev. 2  |  ID: 1639 Direction: Neutral
Gas Transmission Northwest

OCTOBER 2026 - GTN Fuel and Line Loss Percentage

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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Notice Category: Non-Critical
Notice Type: Rates-Chrgs
Notice Status: Initiate
Posting Date/Time: 09/18/2026 06:00
Notice Eff Date/Time: 09/18/2026 06:00

Subject: OCTOBER 2026 - GTN Fuel and Line Loss Percentage
Posted: 2026-09-21 12:02 UTC  |  Rev. 2  |  ID: 1640 Direction: Neutral