Northwest Pipeline LLC Notice Detail

TSP Name:  Northwest Pipeline LLC     TSP:  67977322

Critical:  Y
Notice Stat Desc:  INITIATE
Notice Type Desc:  MAINTENANCE
Post D/T:  08/04/2025 8:28 AM MCT
Notice Eff D/T:  08/04/2025 8:28 AM MCT
Notice End D/T:  
Reqrd Rsp Desc:  No response required
Rsp D/T:  

Notice ID:  25-112
Prior Notice:  
Subject:  Chehalis Unplanned Maintenance, Notice of Recall and OFO, and Potential Deficien

Notice Text:

Northwest is experiencing additional unplanned maintenance at 
the Chehalis compressor station. 

Effective Gas Day Tuesday, August 05, 2025, and until further 
notice, Northwest is issuing an OFO Recall Advisory and 
Operational Flow Order (OFO) southbound through the Chehalis
compressor pursuant to Section 14.15(d) of its Tariff to bring 
the station down to design of 672,000 Dth/d southbound. 
Additionally, the available capacity will be 600,000 Dth/d 
southbound.

Under the OFO Recall Advisory, Shippers are required to: (1) 
recall capacity that is subject to an OFO recall provision; or 
(2) take other action that is acceptable to Northwest, to 
satisfy its OFO obligation.

If the southbound scheduled quantities exceed Northwest’s 
design capacity of 672,000 Dth/d at Chehalis Northwest will 
provide Shippers with their specific OFO obligations by 4:00 
p.m. MST. Shippers must comply with their OFO obligations no 
later than the Evening nomination deadline (5:00 p.m. MST).

If an OFO is necessary for a given Gas Day, Northwest will wait 
until the Evening scheduling process to provide notice of a 
Declared Deficiency period and will make deficiency cuts to 
bring the nomination requests at the Chehalis compressor from 
the design capacity of 672,000 Dth/d to the operationally 
available capacity of 600,000 Dth/d. If an OFO is not 
necessary, but a deficiency period is, Northwest will provide 
notice of a Declared Deficiency period and will make deficiency 
cuts in the Timely scheduling process to bring the nomination 
requests at the Chehalis compressor to the operationally 
available capacity of 600,000 Dth/d (or whatever NWP cannot 
mitigate during any day of the unplanned maintenance period), 
all pursuant to Sections 10.2 and 10.3 of Rate Schedule TF-1 in 
Northwest's Tariff. The deficiency period will continue until 
the work is completed. 

Northwest Pipeline will work diligently to bring this station 
back into service as quickly as possible to minimize any 
impacts.

Shippers can monitor throughput quantities and obtain a copy of 
Northwest’s OFO procedures on Northwest’s website at 
www.northwest.williams.com.  

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