Northwest Pipeline LLC NOTICE #28845 Supply Shortage OFO Warning posted on Feb 25 2019 4:43PM TSP Name: Northwest Pipeline LLC TSP: 67977322 Critical: Y Notice Stat Desc: INITIATE Notice Type Desc: OTHER Post D/T: 02/25/2019 4:43 PM MCT Notice Eff D/T: 02/25/2019 4:43 PM MCT Notice End D/T: Reqrd Rsp Desc: No response required Rsp D/T: Notice ID: 19-043 Prior Notice: Subject: Supply Shortage OFO Warning Notice Text: Due to the declining deliverability at Jackson Prairie described in Notice # 19-042, and the anticipated reduction of available gas supply at Sumas beginning February 27 as a result of Enbridge work, Shipper compliance with Realignment and Must-Flow OFOs will be critical to avoid issuance of a Supply Shortage OFO. If there is insufficient gas supply physically available to comply with Must-Flow OFOs, Northwest will issue a Supply Shortage OFO. Non-compliance with a Must-Flow OFO will result in penalties, unless Northwest accepts an affidavit, executed by an officer of Shipper, declaring that gas was physically unavailable for OFO compliance. Northwest will not accept such an affidavit if is aware of the physical availability of supply. The OFO Affidavit Instructions and Form are available to download from Northwest's Portal at the following link: http://www.northwest.williams.com/NWP_Portal/file_download?hfFileURL=Files/Northwest/Other/OFOAffidavitInstructionsandForm.pdf If you have any questions, please contact Mike Rasmuson at 801-584-7278 or Gary Venz 801-584-6621. DA/GV/SM/DM