Northwest Notice 25-052

TSP Name: Northwest Pipeline LLC TSP: 67977322

Critical: Y
Notice Stat Desc: INITIATE
Notice Type Desc: MAINTENANCE
Post D/T: 04/18/2025 9:20 AM MCT
Notice Eff D/T: 04/18/2025 9:20 AM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Rsp D/T:

Notice ID: 25-052
Prior Notice:
Subject: Sumas B Plant Disconnect, Boise CS Generator Install/ESD, Mt. Vernon CS Solar In

Notice Text:

As posted in the maintenance schedule on Northwest Pipeline's 
website, Northwest is performing maintenance at the following 
locations:

- Sumas CS beginning gas day April 21, 2025, through gas day 
April 22, 2025. 

- Boise CS beginning gas day April 21, 2025, through gas day May 
02, 2025.

- Mt. Vernon CS on gas day April 22, 2025.

- Pegram CS beginning on gas day April 22, 2025, through gas day 
April 23, 2025.

- Pocatello CS beginning gas day April 22, 2025, through gas day 
April 23, 2025. 

The Sumas CS will be limited to 1,069,000 Dth/d southbound for 
the duration of the outage. 

If primary nomination requests through the Sumas CS exceeds 
the available capacity of 1,069,000 Dth/d southbound (or 
whatever NWP cannot mitigate during any day of the 
maintenance), pursuant to Sections 10.2 and 10.3 of Rate 
Schedule TF-1 in Northwest's Tariff, Northwest will give notice 
of a Declared Deficiency Period based on a design capacity of 
1,409,000 Dth/d southbound. The deficiency period will continue 
until the work is completed on gas day April 22, 2025. 

The Boise CS will be limited to 437,000 Dth/d northbound and 
438,000 Dth/d southbound for the duration of the outage. 

If primary nomination requests through the Boise CS exceeds 
the available capacity of 437,000 Dth/d northbound or 438,000 
Dth/d southbound (or whatever NWP cannot mitigate during any 
day of the maintenance), pursuant to Sections 10.2 and 10.3 of 
Rate Schedule TF-1 in Northwest's Tariff, Northwest will give 
notice of a Declared Deficiency Period based on a design 
capacity of 499,000 Dth/d northbound or 452,000 Dth/d 
southbound. The deficiency period will continue until the work 
is completed on gas day May 02, 2025. 

The Mt. Vernon CS will be limited to 1,177,000 Dth/d southbound 
for the duration of the outage. 

If primary nomination requests through the Mt. Vernon CS 
exceeds the available capacity of 1,177,000 Dth/d southbound 
(or whatever NWP cannot mitigate during any day of the 
maintenance), pursuant to Sections 10.2 and 10.3 of Rate 
Schedule TF-1 in Northwest's Tariff, Northwest will give notice 
of a Declared Deficiency Period based on a design capacity of 
1,277,000 Dth/d southbound. The deficiency period will continue 
until the work is completed on gas day April 22, 2025. 

The Pegram CS will be limited to 602,000 Dth/d northbound for 
the duration of the outage. 

If primary nomination requests through the Pegram CS exceeds 
the available capacity of 602,000 Dth/d northbound (or whatever 
NWP cannot mitigate during any day of the maintenance), 
pursuant to Sections 10.2 and 10.3 of Rate Schedule TF-1 in 
Northwest's Tariff, Northwest will give notice of a Declared 
Deficiency Period based on a design capacity of 654,000 Dth/d 
northbound. The deficiency period will continue until the work 
is completed on gas day April 23, 2025.

The Pocatello CS will be limited to 499,000 Dth/d northbound 
for the duration of the outage. 

If primary nomination requests through the Pocatello CS exceeds 
the available capacity of 499,000 Dth/d northbound (or whatever 
NWP cannot mitigate during any day of the maintenance), 
pursuant to Sections 10.2 and 10.3 of Rate Schedule TF-1 in 
Northwest's Tariff, Northwest will give notice of a Declared 
Deficiency Period based on a design capacity of 610,000 Dth/d 
northbound. The deficiency period will continue until the work 
is completed on gas day April 23, 2025


Please reference the Maintenance Schedule tab at 
www.northwest.williams.com for more information.


If you have any questions, please call your Commercial Services 
Representative or the hotline at 713-215-6301.