TSP Name: Northwest Pipeline LLC TSP: 67977322
Critical: Y
Notice Stat Desc: INITIATE
Notice Type Desc: MAINTENANCE
Post D/T: 05/15/2026 11:47 AM MCT
Notice Eff D/T: 05/15/2026 11:47 AM MCT
Notice End D/T:
Reqrd Rsp Desc: No response required
Rsp D/T:
Notice ID: 26-111
Prior Notice:
Subject: Washougal PLC 5 Upgrade - Maintenance Reminder
Notice Text:
As posted in the maintenance schedule on Northwest Pipeline's website, Northwest will be performing maintenance at the following location next week:
- Oregon City CS: located at MP 21.06 in Clackamas County, Oregon on gas day May 20, 2026, through gas day June 15, 2026.
The Oregon City CS will be limited to 239,000 Dth/d northbound for the duration of the outage.
If primary nomination requests through the Oregon City CS exceeds the available capacity of 239,000 Dth/d northbound (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 250,000 Dth/d northbound. 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.
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