Northwest Notice 26-046

TSP Name: Northwest Pipeline LLC TSP: 67977322

Critical: Y
Notice Stat Desc: INITIATE
Notice Type Desc: MAINTENANCE
Post D/T: 04/13/2026 8:45 AM MCT
Notice Eff D/T: 04/13/2026 8:45 AM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Rsp D/T:

Notice ID: 26-046
Prior Notice:
Subject: Caldwell CS – Unplanned Maintenance

Notice Text:

Northwest is experiencing unplanned maintenance at Caldwell 
Unit 4, located at MP 849.8 in Gem County, Idaho. Initial 
assessments indicate this is expected to result in an extended 
outage, with an estimated duration of 60 to 90 days to 
complete the required repairs.

Northwest is doing everything possible to complete the work as 
quickly and safely as possible to bring in this timeline. We 
will provide updates on our EBB as additional information 
becomes available. 

Effective Gas Day Tuesday, April 14, 2026, the available 
capacity at the Caldwell Compressor Station will be limited to 
438,000 Dth/d northbound and 439,000 Dth/d southbound. 

If primary nomination requests through the Caldwell CS exceeds 
the available capacity of 438,000 Dth/d northbound or 439,000 
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 452,000 Dth/d northbound or 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.