TSP Name: Northern Natural Gas Company TSP: 784158214 Notice ID: 101472 Notice Type: Over-Under Performance Subject: UPDATE 2: UNDERPERFORMANCE - FIELD AREA RECEIPT POINTS Location: FIELD AREA Critical: N Post Date/Time: 01/25/2026 08:56 AM Notice Status: Supersede Prior Notice: 101400 For Gas Day(s): 01/24/2026 - 01/26/2026 Notice Effective Date/Time: 01/25/2026 08:56 AM Notice End Date/Time: 01/27/2026 08:59 AM Required Response Indicator Description: 5-No response required Notice Text: Update 2: Northern isno longerexperiencing underperformance at the previously mentioned Field Area receipt points. Northern will continue to monitorreceiptpoint performance and provide further updates, if necessary. Update 1: Kinder Morgan Keystone Storage Winkler (POI 78353) has been added to the list of underperforming receipt points. Northern is currently experiencing underperformance at the following Field Area receipt Points: POI Field Area Receipt Points 78353 Kinder Morgan Keystone Storage Winkler 78949 ETC Martin County As a result, Northern may be required to allocate the underperforming receipt points to actual flowing volumes during an intraday nomination cycle to protect pipeline integrity. As performance improves at the receipt Points, allocations may be lifted. If you have any questions, contact your customer service or marketing representative.