Northwest Pipeline LLC NOTICE #30009 Maintenance conference call posted on Mar 18 2021 7:56AM TSP Name: Northwest Pipeline LLC TSP: 67977322 Critical: N Notice Stat Desc: INITIATE Notice Type Desc: MAINTENANCE Post D/T: 03/18/2021 7:56 AM MCT Notice Eff D/T: 03/18/2021 7:56 AM MCT Notice End D/T: Reqrd Rsp Desc: No response required Rsp D/T: Notice ID: 21-063 Prior Notice: Subject: Maintenance conference call Notice Text:

Northwest will hold the annual maintenance conference call today, Thursday,

March 18, 2021, at 2:00 PM MDT.

The call-in number is 385-355-3006 and the conference ID is 707046842#.

The presentation can be found at

http://www.northwest.williams.com (other/miscellaneous downloads/2021

Maintenance Conference call.)

The 2021 maintenance schedule has been posted on Northwest’s portal under

Maintenance Schedule. Please note that some work is listed as both northbound

and southbound. The impact will be on whatever the direction the gas is

flowing at the time of the work.

Please note that the estimated capacity reductions and project durations

are dependent on many variables and are subject to change. Northwest will

update the schedule as the projects progress and new information becomes

available.

If you have questions please contact your Marketing Services representative or

call the hotline at (713) 215-6301.

NWP

DA