Northwest Notice 25-116

TSP Name: Northwest Pipeline LLC TSP: 67977322

Critical: Y
Notice Stat Desc: SUPERSEDE
Notice Type Desc: MAINTENANCE
Post D/T: 08/12/2025 8:28 AM MCT
Notice Eff D/T: 08/11/2025 8:28 AM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Rsp D/T:

Notice ID: 25-116
Prior Notice: 25-112
Subject: Update - Chehalis Outage ISD

Notice Text:

As referenced in Notice ID# 25-112, Northwest is experiencing 
additional unplanned maintenance at the Chehalis Compressor 
Station. The current available capacity is 600,000 Dth/day 
southbound. The in-service date is now expected to be gas day 
August 22, 2025. 

Northwest apologizes for the prolonged disruption at the 
Chehalis Compressor Station. Although the previously completed 
work was done successfully and safely, it is not unexpected to 
experience some residual attention and recalibration in 
adjacent areas as Unit 1 exercises high amounts of run time. 
Northwest’s operational and commercial priority is to bring 
Chehalis back to full and consistent throughputs for an 
uninterrupted remainder of the year.

Northwest will continue to mitigate Operational Flow Orders 
(OFO) and deficiency impacts at the Chehalis compressor station 
on an operationally available basis, as referenced in Notice ID 
25-112. Any changes or updates to the schedule will be promptly 
communicated via the Northwest Pipeline Portal.  

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


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