Willard ESD/DOT S/D's & Mt. Vernon Solar Inspections

TSP Name: Northwest Pipeline LLC TSP: 67977322

Critical: Y
Notice Stat Desc: INITIATE
Notice Type Desc: MAINTENANCE
Post D/T: 04/09/2026 8:39 AM MCT
Notice Eff D/T: 04/09/2026 8:39 AM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Rsp D/T:

Notice ID: 26-045
Prior Notice:
Subject: Willard ESD/DOT S/D's & Mt. Vernon Solar Inspections

Notice Text:

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

- Willard CS: located at MP 1175.2 in Skamania County, 
        Washington on gas day April 14, 2026.

- Mt. Vernon CS: located at MP 1440.18 in Skagit County, 
        Washington beginning gas day April 14, 2026, through 
        gas day April 15, 2026.

The Willard CS will be limited to 380,000 Dth/d northbound and 
383,000 Dth/d southbound for the duration of the outage.

If primary nomination requests through the Willard CS exceeds 
the available capacity of 380,000 Dth/d northbound or 383,000 
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 540,000 Dth/d northbound or 431,000 Dth/d 
southbound. The deficiency period will continue until the work 
has been completed. 

The Mt. Vernon CS will be limited to 1,177,000 Dth/d southbound 
on gas day April 14, 2026, and limited to 1,240,000 Dth/d 
southbound on gas day April 15, 2026.

If primary nomination requests through the Mt. Vernon CS 
exceeds the available capacity of 1,177,000 Dth/d southbound on 
gas day April 14, 2026, or 1,240,000 Dth/d southbound on gas 
day April 15, 2026 (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 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.