TSP Name: Northwest Pipeline LLC TSP: 67977322
Notice Stat Desc: INITIATE
Notice Type Desc: MAINTENANCE
Post D/T: 09/12/2023 1:13 PM MCT
Notice Eff D/T: 09/12/2023 1:13 PM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Notice ID: 23-187
Subject: Vernal Corridor Hydrotest - Maintenace Update/Reminder
As posted in the maintenance schedule on Northwest Pipeline's
website, Northwest is performing a hydrotest in the Vernal
District beginning September 14, 2023 through September 23,
2023. As a reminder, Clay Basin will also be shut in from
Northwest Pipeline for the duration of this outage.
During this outage, Northwest will not be able to schedule
nominations that are net greater than 0 Dth/d northbound at the
Vernal Compressor Station or net greater than 0 Dth/d
southbound at the Green River South Constraint.
If the primary scheduled quantities during this outage exceed
the operationally available capacity of 0 Dth/d northbound at
the Vernal Compressor Station or 0 Dth/d southbound at the
Green River South Constraint (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 the
Vernal Compressor Station northbound design capacity of 353,000
Dth/d and the Green River South Constraint southbound design
capacity of 378,617. The deficiency period will continue
until the work is completed on September 23, 2023.
Northwest’s balancing flexibility during this period will be
extremely limited and the current Stage II (8%) Underrun
Entitlement North of Kemmerer remains active. Northwest
encourages its shippers to diligently manage natural gas
deliveries to ensure that they are in-line with customers’
takes to avoid leaving excess gas on the system. Northwest
appreciates customer support during this upcoming period and
will provide system updates based on changing operating
conditions as needed.
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.