Boise ESD & Hwy 20/26 Expansion LL - Maintenance Reminder

TSP Name: Northwest Pipeline LLC TSP: 67977322

Critical: Y
Notice Stat Desc: INITIATE
Notice Type Desc: MAINTENANCE
Post D/T: 05/21/2026 7:52 AM MCT
Notice Eff D/T: 05/21/2026 7:52 AM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Rsp D/T:

Notice ID: 26-114
Prior Notice:
Subject: Boise ESD & Hwy 20/26 Expansion LL - Maintenance Reminder

Notice Text:

As posted in the maintenance schedule on Northwest Pipeline's 
website, Northwest will be performing maintenance at the 
following locations next week:

 

- Boise CS: located at MP 802.8 in Ada County, Idaho 
        beginning gas day May 26, 2026, through gas day June 22, 
        2026.
- Caldwell CS: located at MP 849.8 in Gem County, Idaho 
        beginning gas day May 27, 2026, through gas day June 22, 
        2026.

The Boise CS will be limited to 438,000 Dth/d southbound 
beginning gas day May 26, 2026, through gas day May 28, 2026, 
and 336,000 Dth/d northbound beginning gas day May 27, 2026, 
through gas day June 22, 2026.

If primary nomination requests through the Boise CS exceeds the 
available capacity of 438,000 Dth/d southbound or 336,000 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 
452,000 Dth/d southbound or 499,000 Dth/d northbound. The 
deficiency period will continue until the work has been 
completed.

The Caldwell CS will be limited to 288,000 Dth/d southbound for 
the duration of the outage.

If primary nomination requests through the Caldwell CS exceeds 
the available capacity of 288,000 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 475,000 Dth/d 
southbound. The deficiency period will continue until the work 
has been completed.

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.