TSP Name: Northwest Pipeline LLC TSP: 67977322
Critical: Y
Notice Stat Desc: INITIATE
Notice Type Desc: MAINTENANCE
Post D/T: 09/01/2025 7:18 PM MCT
Notice Eff D/T: 09/01/2025 7:18 PM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Rsp D/T:
Notice ID: 25-139
Prior Notice:
Subject: Chehalis Unplanned Outage
Notice Text:
Northwest is experiencing additional unplanned maintenance at
the Chehalis compressor station.
Effective Gas Day Wednesday, September 03, 2025, and until
further notice, the available capacity through the Chehalis CS
will be 600,000 Dth/d Southbound.
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.
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 apologizes for this additional disruption
and is working diligently to safely 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.